function _mergeNamespaces(n, m) {
    m.forEach(function (e) {
        e && typeof e !== 'string' && !Array.isArray(e) && Object.keys(e).forEach(function (k) {
            if (k !== 'default' && !(k in n)) {
                var d = Object.getOwnPropertyDescriptor(e, k);
                Object.defineProperty(n, k, d.get ? d : {
                    enumerable: true,
                    get: function () { return e[k]; }
                });
            }
        });
    });
    return Object.freeze(n);
}

/******************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */

function __awaiter(thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
}

/**
 * @license
 * Copyright 2010-2022 Three.js Authors
 * SPDX-License-Identifier: MIT
 */
const REVISION = "137";
const MOUSE = {LEFT: 0, MIDDLE: 1, RIGHT: 2, ROTATE: 0, DOLLY: 1, PAN: 2};
const TOUCH = {ROTATE: 0, PAN: 1, DOLLY_PAN: 2, DOLLY_ROTATE: 3};
const CullFaceNone = 0;
const CullFaceBack = 1;
const CullFaceFront = 2;
const PCFShadowMap = 1;
const PCFSoftShadowMap = 2;
const VSMShadowMap = 3;
const FrontSide = 0;
const BackSide = 1;
const DoubleSide = 2;
const FlatShading = 1;
const NoBlending = 0;
const NormalBlending = 1;
const AdditiveBlending = 2;
const SubtractiveBlending = 3;
const MultiplyBlending = 4;
const CustomBlending = 5;
const AddEquation = 100;
const SubtractEquation = 101;
const ReverseSubtractEquation = 102;
const MinEquation = 103;
const MaxEquation = 104;
const ZeroFactor = 200;
const OneFactor = 201;
const SrcColorFactor = 202;
const OneMinusSrcColorFactor = 203;
const SrcAlphaFactor = 204;
const OneMinusSrcAlphaFactor = 205;
const DstAlphaFactor = 206;
const OneMinusDstAlphaFactor = 207;
const DstColorFactor = 208;
const OneMinusDstColorFactor = 209;
const SrcAlphaSaturateFactor = 210;
const NeverDepth = 0;
const AlwaysDepth = 1;
const LessDepth = 2;
const LessEqualDepth = 3;
const EqualDepth = 4;
const GreaterEqualDepth = 5;
const GreaterDepth = 6;
const NotEqualDepth = 7;
const MultiplyOperation = 0;
const MixOperation = 1;
const AddOperation = 2;
const NoToneMapping = 0;
const LinearToneMapping = 1;
const ReinhardToneMapping = 2;
const CineonToneMapping = 3;
const ACESFilmicToneMapping = 4;
const CustomToneMapping = 5;
const UVMapping = 300;
const CubeReflectionMapping = 301;
const CubeRefractionMapping = 302;
const EquirectangularReflectionMapping = 303;
const EquirectangularRefractionMapping = 304;
const CubeUVReflectionMapping = 306;
const CubeUVRefractionMapping = 307;
const RepeatWrapping = 1e3;
const ClampToEdgeWrapping = 1001;
const MirroredRepeatWrapping = 1002;
const NearestFilter = 1003;
const NearestMipmapNearestFilter = 1004;
const NearestMipmapLinearFilter = 1005;
const LinearFilter = 1006;
const LinearMipmapNearestFilter = 1007;
const LinearMipmapLinearFilter = 1008;
const UnsignedByteType = 1009;
const ByteType = 1010;
const ShortType = 1011;
const UnsignedShortType = 1012;
const IntType = 1013;
const UnsignedIntType = 1014;
const FloatType = 1015;
const HalfFloatType = 1016;
const UnsignedShort4444Type = 1017;
const UnsignedShort5551Type = 1018;
const UnsignedInt248Type = 1020;
const AlphaFormat = 1021;
const RGBAFormat = 1023;
const LuminanceFormat = 1024;
const LuminanceAlphaFormat = 1025;
const DepthFormat = 1026;
const DepthStencilFormat = 1027;
const RedFormat = 1028;
const RedIntegerFormat = 1029;
const RGFormat = 1030;
const RGIntegerFormat = 1031;
const RGBAIntegerFormat = 1033;
const RGB_S3TC_DXT1_Format = 33776;
const RGBA_S3TC_DXT1_Format = 33777;
const RGBA_S3TC_DXT3_Format = 33778;
const RGBA_S3TC_DXT5_Format = 33779;
const RGB_PVRTC_4BPPV1_Format = 35840;
const RGB_PVRTC_2BPPV1_Format = 35841;
const RGBA_PVRTC_4BPPV1_Format = 35842;
const RGBA_PVRTC_2BPPV1_Format = 35843;
const RGB_ETC1_Format = 36196;
const RGB_ETC2_Format = 37492;
const RGBA_ETC2_EAC_Format = 37496;
const RGBA_ASTC_4x4_Format = 37808;
const RGBA_ASTC_5x4_Format = 37809;
const RGBA_ASTC_5x5_Format = 37810;
const RGBA_ASTC_6x5_Format = 37811;
const RGBA_ASTC_6x6_Format = 37812;
const RGBA_ASTC_8x5_Format = 37813;
const RGBA_ASTC_8x6_Format = 37814;
const RGBA_ASTC_8x8_Format = 37815;
const RGBA_ASTC_10x5_Format = 37816;
const RGBA_ASTC_10x6_Format = 37817;
const RGBA_ASTC_10x8_Format = 37818;
const RGBA_ASTC_10x10_Format = 37819;
const RGBA_ASTC_12x10_Format = 37820;
const RGBA_ASTC_12x12_Format = 37821;
const RGBA_BPTC_Format = 36492;
const LoopOnce = 2200;
const LoopRepeat = 2201;
const LoopPingPong = 2202;
const InterpolateDiscrete = 2300;
const InterpolateLinear = 2301;
const InterpolateSmooth = 2302;
const ZeroCurvatureEnding = 2400;
const ZeroSlopeEnding = 2401;
const WrapAroundEnding = 2402;
const NormalAnimationBlendMode = 2500;
const AdditiveAnimationBlendMode = 2501;
const TrianglesDrawMode = 0;
const TriangleStripDrawMode = 1;
const TriangleFanDrawMode = 2;
const LinearEncoding = 3e3;
const sRGBEncoding = 3001;
const BasicDepthPacking = 3200;
const RGBADepthPacking = 3201;
const TangentSpaceNormalMap = 0;
const ObjectSpaceNormalMap = 1;
const KeepStencilOp = 7680;
const AlwaysStencilFunc = 519;
const StaticDrawUsage = 35044;
const DynamicDrawUsage = 35048;
const GLSL3 = "300 es";
const _SRGBAFormat = 1035;
class EventDispatcher {
  addEventListener(type, listener) {
    if (this._listeners === void 0)
      this._listeners = {};
    const listeners = this._listeners;
    if (listeners[type] === void 0) {
      listeners[type] = [];
    }
    if (listeners[type].indexOf(listener) === -1) {
      listeners[type].push(listener);
    }
  }
  hasEventListener(type, listener) {
    if (this._listeners === void 0)
      return false;
    const listeners = this._listeners;
    return listeners[type] !== void 0 && listeners[type].indexOf(listener) !== -1;
  }
  removeEventListener(type, listener) {
    if (this._listeners === void 0)
      return;
    const listeners = this._listeners;
    const listenerArray = listeners[type];
    if (listenerArray !== void 0) {
      const index = listenerArray.indexOf(listener);
      if (index !== -1) {
        listenerArray.splice(index, 1);
      }
    }
  }
  dispatchEvent(event) {
    if (this._listeners === void 0)
      return;
    const listeners = this._listeners;
    const listenerArray = listeners[event.type];
    if (listenerArray !== void 0) {
      event.target = this;
      const array = listenerArray.slice(0);
      for (let i = 0, l = array.length; i < l; i++) {
        array[i].call(this, event);
      }
      event.target = null;
    }
  }
}
const _lut = [];
for (let i = 0; i < 256; i++) {
  _lut[i] = (i < 16 ? "0" : "") + i.toString(16);
}
let _seed = 1234567;
const DEG2RAD = Math.PI / 180;
const RAD2DEG = 180 / Math.PI;
function generateUUID() {
  const d0 = Math.random() * 4294967295 | 0;
  const d1 = Math.random() * 4294967295 | 0;
  const d2 = Math.random() * 4294967295 | 0;
  const d3 = Math.random() * 4294967295 | 0;
  const uuid = _lut[d0 & 255] + _lut[d0 >> 8 & 255] + _lut[d0 >> 16 & 255] + _lut[d0 >> 24 & 255] + "-" + _lut[d1 & 255] + _lut[d1 >> 8 & 255] + "-" + _lut[d1 >> 16 & 15 | 64] + _lut[d1 >> 24 & 255] + "-" + _lut[d2 & 63 | 128] + _lut[d2 >> 8 & 255] + "-" + _lut[d2 >> 16 & 255] + _lut[d2 >> 24 & 255] + _lut[d3 & 255] + _lut[d3 >> 8 & 255] + _lut[d3 >> 16 & 255] + _lut[d3 >> 24 & 255];
  return uuid.toUpperCase();
}
function clamp$2(value, min, max) {
  return Math.max(min, Math.min(max, value));
}
function euclideanModulo(n, m) {
  return (n % m + m) % m;
}
function mapLinear(x, a1, a2, b1, b2) {
  return b1 + (x - a1) * (b2 - b1) / (a2 - a1);
}
function inverseLerp(x, y, value) {
  if (x !== y) {
    return (value - x) / (y - x);
  } else {
    return 0;
  }
}
function lerp$2(x, y, t) {
  return (1 - t) * x + t * y;
}
function damp(x, y, lambda, dt) {
  return lerp$2(x, y, 1 - Math.exp(-lambda * dt));
}
function pingpong(x, length = 1) {
  return length - Math.abs(euclideanModulo(x, length * 2) - length);
}
function smoothstep(x, min, max) {
  if (x <= min)
    return 0;
  if (x >= max)
    return 1;
  x = (x - min) / (max - min);
  return x * x * (3 - 2 * x);
}
function smootherstep(x, min, max) {
  if (x <= min)
    return 0;
  if (x >= max)
    return 1;
  x = (x - min) / (max - min);
  return x * x * x * (x * (x * 6 - 15) + 10);
}
function randInt(low, high) {
  return low + Math.floor(Math.random() * (high - low + 1));
}
function randFloat(low, high) {
  return low + Math.random() * (high - low);
}
function randFloatSpread(range) {
  return range * (0.5 - Math.random());
}
function seededRandom(s) {
  if (s !== void 0)
    _seed = s % 2147483647;
  _seed = _seed * 16807 % 2147483647;
  return (_seed - 1) / 2147483646;
}
function degToRad(degrees) {
  return degrees * DEG2RAD;
}
function radToDeg(radians) {
  return radians * RAD2DEG;
}
function isPowerOfTwo(value) {
  return (value & value - 1) === 0 && value !== 0;
}
function ceilPowerOfTwo(value) {
  return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));
}
function floorPowerOfTwo(value) {
  return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));
}
function setQuaternionFromProperEuler(q, a, b, c, order) {
  const cos = Math.cos;
  const sin = Math.sin;
  const c2 = cos(b / 2);
  const s2 = sin(b / 2);
  const c13 = cos((a + c) / 2);
  const s13 = sin((a + c) / 2);
  const c1_3 = cos((a - c) / 2);
  const s1_3 = sin((a - c) / 2);
  const c3_1 = cos((c - a) / 2);
  const s3_1 = sin((c - a) / 2);
  switch (order) {
    case "XYX":
      q.set(c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13);
      break;
    case "YZY":
      q.set(s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13);
      break;
    case "ZXZ":
      q.set(s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13);
      break;
    case "XZX":
      q.set(c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13);
      break;
    case "YXY":
      q.set(s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13);
      break;
    case "ZYZ":
      q.set(s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13);
      break;
    default:
      console.warn("THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: " + order);
  }
}
var MathUtils = /* @__PURE__ */ Object.freeze({
  __proto__: null,
  DEG2RAD,
  RAD2DEG,
  generateUUID,
  clamp: clamp$2,
  euclideanModulo,
  mapLinear,
  inverseLerp,
  lerp: lerp$2,
  damp,
  pingpong,
  smoothstep,
  smootherstep,
  randInt,
  randFloat,
  randFloatSpread,
  seededRandom,
  degToRad,
  radToDeg,
  isPowerOfTwo,
  ceilPowerOfTwo,
  floorPowerOfTwo,
  setQuaternionFromProperEuler
});
class Vector2$1 {
  constructor(x = 0, y = 0) {
    this.x = x;
    this.y = y;
  }
  get width() {
    return this.x;
  }
  set width(value) {
    this.x = value;
  }
  get height() {
    return this.y;
  }
  set height(value) {
    this.y = value;
  }
  set(x, y) {
    this.x = x;
    this.y = y;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    return this;
  }
  add(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.");
      return this.addVectors(v, w);
    }
    this.x += v.x;
    this.y += v.y;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    return this;
  }
  sub(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.");
      return this.subVectors(v, w);
    }
    this.x -= v.x;
    this.y -= v.y;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    return this;
  }
  multiply(v) {
    this.x *= v.x;
    this.y *= v.y;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    return this;
  }
  divide(v) {
    this.x /= v.x;
    this.y /= v.y;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  applyMatrix3(m) {
    const x = this.x, y = this.y;
    const e = m.elements;
    this.x = e[0] * x + e[3] * y + e[6];
    this.y = e[1] * x + e[4] * y + e[7];
    return this;
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    return this;
  }
  clamp(min, max) {
    this.x = Math.max(min.x, Math.min(max.x, this.x));
    this.y = Math.max(min.y, Math.min(max.y, this.y));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    return this;
  }
  clampLength(min, max) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    return this;
  }
  roundToZero() {
    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y;
  }
  cross(v) {
    return this.x * v.y - this.y * v.x;
  }
  lengthSq() {
    return this.x * this.x + this.y * this.y;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  angle() {
    const angle = Math.atan2(-this.y, -this.x) + Math.PI;
    return angle;
  }
  distanceTo(v) {
    return Math.sqrt(this.distanceToSquared(v));
  }
  distanceToSquared(v) {
    const dx = this.x - v.x, dy = this.y - v.y;
    return dx * dx + dy * dy;
  }
  manhattanDistanceTo(v) {
    return Math.abs(this.x - v.x) + Math.abs(this.y - v.y);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    return this;
  }
  equals(v) {
    return v.x === this.x && v.y === this.y;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    return array;
  }
  fromBufferAttribute(attribute, index, offset) {
    if (offset !== void 0) {
      console.warn("THREE.Vector2: offset has been removed from .fromBufferAttribute().");
    }
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    return this;
  }
  rotateAround(center, angle) {
    const c = Math.cos(angle), s = Math.sin(angle);
    const x = this.x - center.x;
    const y = this.y - center.y;
    this.x = x * c - y * s + center.x;
    this.y = x * s + y * c + center.y;
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
  }
}
Vector2$1.prototype.isVector2 = true;
class Matrix3$1 {
  constructor() {
    this.elements = [
      1,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      1
    ];
    if (arguments.length > 0) {
      console.error("THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.");
    }
  }
  set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {
    const te = this.elements;
    te[0] = n11;
    te[1] = n21;
    te[2] = n31;
    te[3] = n12;
    te[4] = n22;
    te[5] = n32;
    te[6] = n13;
    te[7] = n23;
    te[8] = n33;
    return this;
  }
  identity() {
    this.set(1, 0, 0, 0, 1, 0, 0, 0, 1);
    return this;
  }
  copy(m) {
    const te = this.elements;
    const me = m.elements;
    te[0] = me[0];
    te[1] = me[1];
    te[2] = me[2];
    te[3] = me[3];
    te[4] = me[4];
    te[5] = me[5];
    te[6] = me[6];
    te[7] = me[7];
    te[8] = me[8];
    return this;
  }
  extractBasis(xAxis, yAxis, zAxis) {
    xAxis.setFromMatrix3Column(this, 0);
    yAxis.setFromMatrix3Column(this, 1);
    zAxis.setFromMatrix3Column(this, 2);
    return this;
  }
  setFromMatrix4(m) {
    const me = m.elements;
    this.set(me[0], me[4], me[8], me[1], me[5], me[9], me[2], me[6], me[10]);
    return this;
  }
  multiply(m) {
    return this.multiplyMatrices(this, m);
  }
  premultiply(m) {
    return this.multiplyMatrices(m, this);
  }
  multiplyMatrices(a, b) {
    const ae = a.elements;
    const be = b.elements;
    const te = this.elements;
    const a11 = ae[0], a12 = ae[3], a13 = ae[6];
    const a21 = ae[1], a22 = ae[4], a23 = ae[7];
    const a31 = ae[2], a32 = ae[5], a33 = ae[8];
    const b11 = be[0], b12 = be[3], b13 = be[6];
    const b21 = be[1], b22 = be[4], b23 = be[7];
    const b31 = be[2], b32 = be[5], b33 = be[8];
    te[0] = a11 * b11 + a12 * b21 + a13 * b31;
    te[3] = a11 * b12 + a12 * b22 + a13 * b32;
    te[6] = a11 * b13 + a12 * b23 + a13 * b33;
    te[1] = a21 * b11 + a22 * b21 + a23 * b31;
    te[4] = a21 * b12 + a22 * b22 + a23 * b32;
    te[7] = a21 * b13 + a22 * b23 + a23 * b33;
    te[2] = a31 * b11 + a32 * b21 + a33 * b31;
    te[5] = a31 * b12 + a32 * b22 + a33 * b32;
    te[8] = a31 * b13 + a32 * b23 + a33 * b33;
    return this;
  }
  multiplyScalar(s) {
    const te = this.elements;
    te[0] *= s;
    te[3] *= s;
    te[6] *= s;
    te[1] *= s;
    te[4] *= s;
    te[7] *= s;
    te[2] *= s;
    te[5] *= s;
    te[8] *= s;
    return this;
  }
  determinant() {
    const te = this.elements;
    const a = te[0], b = te[1], c = te[2], d = te[3], e = te[4], f = te[5], g = te[6], h = te[7], i = te[8];
    return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;
  }
  invert() {
    const te = this.elements, n11 = te[0], n21 = te[1], n31 = te[2], n12 = te[3], n22 = te[4], n32 = te[5], n13 = te[6], n23 = te[7], n33 = te[8], t11 = n33 * n22 - n32 * n23, t12 = n32 * n13 - n33 * n12, t13 = n23 * n12 - n22 * n13, det = n11 * t11 + n21 * t12 + n31 * t13;
    if (det === 0)
      return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0);
    const detInv = 1 / det;
    te[0] = t11 * detInv;
    te[1] = (n31 * n23 - n33 * n21) * detInv;
    te[2] = (n32 * n21 - n31 * n22) * detInv;
    te[3] = t12 * detInv;
    te[4] = (n33 * n11 - n31 * n13) * detInv;
    te[5] = (n31 * n12 - n32 * n11) * detInv;
    te[6] = t13 * detInv;
    te[7] = (n21 * n13 - n23 * n11) * detInv;
    te[8] = (n22 * n11 - n21 * n12) * detInv;
    return this;
  }
  transpose() {
    let tmp2;
    const m = this.elements;
    tmp2 = m[1];
    m[1] = m[3];
    m[3] = tmp2;
    tmp2 = m[2];
    m[2] = m[6];
    m[6] = tmp2;
    tmp2 = m[5];
    m[5] = m[7];
    m[7] = tmp2;
    return this;
  }
  getNormalMatrix(matrix4) {
    return this.setFromMatrix4(matrix4).invert().transpose();
  }
  transposeIntoArray(r) {
    const m = this.elements;
    r[0] = m[0];
    r[1] = m[3];
    r[2] = m[6];
    r[3] = m[1];
    r[4] = m[4];
    r[5] = m[7];
    r[6] = m[2];
    r[7] = m[5];
    r[8] = m[8];
    return this;
  }
  setUvTransform(tx, ty, sx, sy, rotation, cx, cy) {
    const c = Math.cos(rotation);
    const s = Math.sin(rotation);
    this.set(sx * c, sx * s, -sx * (c * cx + s * cy) + cx + tx, -sy * s, sy * c, -sy * (-s * cx + c * cy) + cy + ty, 0, 0, 1);
    return this;
  }
  scale(sx, sy) {
    const te = this.elements;
    te[0] *= sx;
    te[3] *= sx;
    te[6] *= sx;
    te[1] *= sy;
    te[4] *= sy;
    te[7] *= sy;
    return this;
  }
  rotate(theta) {
    const c = Math.cos(theta);
    const s = Math.sin(theta);
    const te = this.elements;
    const a11 = te[0], a12 = te[3], a13 = te[6];
    const a21 = te[1], a22 = te[4], a23 = te[7];
    te[0] = c * a11 + s * a21;
    te[3] = c * a12 + s * a22;
    te[6] = c * a13 + s * a23;
    te[1] = -s * a11 + c * a21;
    te[4] = -s * a12 + c * a22;
    te[7] = -s * a13 + c * a23;
    return this;
  }
  translate(tx, ty) {
    const te = this.elements;
    te[0] += tx * te[2];
    te[3] += tx * te[5];
    te[6] += tx * te[8];
    te[1] += ty * te[2];
    te[4] += ty * te[5];
    te[7] += ty * te[8];
    return this;
  }
  equals(matrix) {
    const te = this.elements;
    const me = matrix.elements;
    for (let i = 0; i < 9; i++) {
      if (te[i] !== me[i])
        return false;
    }
    return true;
  }
  fromArray(array, offset = 0) {
    for (let i = 0; i < 9; i++) {
      this.elements[i] = array[i + offset];
    }
    return this;
  }
  toArray(array = [], offset = 0) {
    const te = this.elements;
    array[offset] = te[0];
    array[offset + 1] = te[1];
    array[offset + 2] = te[2];
    array[offset + 3] = te[3];
    array[offset + 4] = te[4];
    array[offset + 5] = te[5];
    array[offset + 6] = te[6];
    array[offset + 7] = te[7];
    array[offset + 8] = te[8];
    return array;
  }
  clone() {
    return new this.constructor().fromArray(this.elements);
  }
}
Matrix3$1.prototype.isMatrix3 = true;
function arrayNeedsUint32(array) {
  for (let i = array.length - 1; i >= 0; --i) {
    if (array[i] > 65535)
      return true;
  }
  return false;
}
function createElementNS(name) {
  return document.createElementNS("http://www.w3.org/1999/xhtml", name);
}
const _colorKeywords = {
  aliceblue: 15792383,
  antiquewhite: 16444375,
  aqua: 65535,
  aquamarine: 8388564,
  azure: 15794175,
  beige: 16119260,
  bisque: 16770244,
  black: 0,
  blanchedalmond: 16772045,
  blue: 255,
  blueviolet: 9055202,
  brown: 10824234,
  burlywood: 14596231,
  cadetblue: 6266528,
  chartreuse: 8388352,
  chocolate: 13789470,
  coral: 16744272,
  cornflowerblue: 6591981,
  cornsilk: 16775388,
  crimson: 14423100,
  cyan: 65535,
  darkblue: 139,
  darkcyan: 35723,
  darkgoldenrod: 12092939,
  darkgray: 11119017,
  darkgreen: 25600,
  darkgrey: 11119017,
  darkkhaki: 12433259,
  darkmagenta: 9109643,
  darkolivegreen: 5597999,
  darkorange: 16747520,
  darkorchid: 10040012,
  darkred: 9109504,
  darksalmon: 15308410,
  darkseagreen: 9419919,
  darkslateblue: 4734347,
  darkslategray: 3100495,
  darkslategrey: 3100495,
  darkturquoise: 52945,
  darkviolet: 9699539,
  deeppink: 16716947,
  deepskyblue: 49151,
  dimgray: 6908265,
  dimgrey: 6908265,
  dodgerblue: 2003199,
  firebrick: 11674146,
  floralwhite: 16775920,
  forestgreen: 2263842,
  fuchsia: 16711935,
  gainsboro: 14474460,
  ghostwhite: 16316671,
  gold: 16766720,
  goldenrod: 14329120,
  gray: 8421504,
  green: 32768,
  greenyellow: 11403055,
  grey: 8421504,
  honeydew: 15794160,
  hotpink: 16738740,
  indianred: 13458524,
  indigo: 4915330,
  ivory: 16777200,
  khaki: 15787660,
  lavender: 15132410,
  lavenderblush: 16773365,
  lawngreen: 8190976,
  lemonchiffon: 16775885,
  lightblue: 11393254,
  lightcoral: 15761536,
  lightcyan: 14745599,
  lightgoldenrodyellow: 16448210,
  lightgray: 13882323,
  lightgreen: 9498256,
  lightgrey: 13882323,
  lightpink: 16758465,
  lightsalmon: 16752762,
  lightseagreen: 2142890,
  lightskyblue: 8900346,
  lightslategray: 7833753,
  lightslategrey: 7833753,
  lightsteelblue: 11584734,
  lightyellow: 16777184,
  lime: 65280,
  limegreen: 3329330,
  linen: 16445670,
  magenta: 16711935,
  maroon: 8388608,
  mediumaquamarine: 6737322,
  mediumblue: 205,
  mediumorchid: 12211667,
  mediumpurple: 9662683,
  mediumseagreen: 3978097,
  mediumslateblue: 8087790,
  mediumspringgreen: 64154,
  mediumturquoise: 4772300,
  mediumvioletred: 13047173,
  midnightblue: 1644912,
  mintcream: 16121850,
  mistyrose: 16770273,
  moccasin: 16770229,
  navajowhite: 16768685,
  navy: 128,
  oldlace: 16643558,
  olive: 8421376,
  olivedrab: 7048739,
  orange: 16753920,
  orangered: 16729344,
  orchid: 14315734,
  palegoldenrod: 15657130,
  palegreen: 10025880,
  paleturquoise: 11529966,
  palevioletred: 14381203,
  papayawhip: 16773077,
  peachpuff: 16767673,
  peru: 13468991,
  pink: 16761035,
  plum: 14524637,
  powderblue: 11591910,
  purple: 8388736,
  rebeccapurple: 6697881,
  red: 16711680,
  rosybrown: 12357519,
  royalblue: 4286945,
  saddlebrown: 9127187,
  salmon: 16416882,
  sandybrown: 16032864,
  seagreen: 3050327,
  seashell: 16774638,
  sienna: 10506797,
  silver: 12632256,
  skyblue: 8900331,
  slateblue: 6970061,
  slategray: 7372944,
  slategrey: 7372944,
  snow: 16775930,
  springgreen: 65407,
  steelblue: 4620980,
  tan: 13808780,
  teal: 32896,
  thistle: 14204888,
  tomato: 16737095,
  turquoise: 4251856,
  violet: 15631086,
  wheat: 16113331,
  white: 16777215,
  whitesmoke: 16119285,
  yellow: 16776960,
  yellowgreen: 10145074
};
const _hslA = {h: 0, s: 0, l: 0};
const _hslB = {h: 0, s: 0, l: 0};
function hue2rgb(p, q, t) {
  if (t < 0)
    t += 1;
  if (t > 1)
    t -= 1;
  if (t < 1 / 6)
    return p + (q - p) * 6 * t;
  if (t < 1 / 2)
    return q;
  if (t < 2 / 3)
    return p + (q - p) * 6 * (2 / 3 - t);
  return p;
}
function SRGBToLinear(c) {
  return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);
}
function LinearToSRGB(c) {
  return c < 31308e-7 ? c * 12.92 : 1.055 * Math.pow(c, 0.41666) - 0.055;
}
class Color {
  constructor(r, g, b) {
    if (g === void 0 && b === void 0) {
      return this.set(r);
    }
    return this.setRGB(r, g, b);
  }
  set(value) {
    if (value && value.isColor) {
      this.copy(value);
    } else if (typeof value === "number") {
      this.setHex(value);
    } else if (typeof value === "string") {
      this.setStyle(value);
    }
    return this;
  }
  setScalar(scalar) {
    this.r = scalar;
    this.g = scalar;
    this.b = scalar;
    return this;
  }
  setHex(hex) {
    hex = Math.floor(hex);
    this.r = (hex >> 16 & 255) / 255;
    this.g = (hex >> 8 & 255) / 255;
    this.b = (hex & 255) / 255;
    return this;
  }
  setRGB(r, g, b) {
    this.r = r;
    this.g = g;
    this.b = b;
    return this;
  }
  setHSL(h, s, l) {
    h = euclideanModulo(h, 1);
    s = clamp$2(s, 0, 1);
    l = clamp$2(l, 0, 1);
    if (s === 0) {
      this.r = this.g = this.b = l;
    } else {
      const p = l <= 0.5 ? l * (1 + s) : l + s - l * s;
      const q = 2 * l - p;
      this.r = hue2rgb(q, p, h + 1 / 3);
      this.g = hue2rgb(q, p, h);
      this.b = hue2rgb(q, p, h - 1 / 3);
    }
    return this;
  }
  setStyle(style) {
    function handleAlpha(string) {
      if (string === void 0)
        return;
      if (parseFloat(string) < 1) {
        console.warn("THREE.Color: Alpha component of " + style + " will be ignored.");
      }
    }
    let m;
    if (m = /^((?:rgb|hsl)a?)\(([^\)]*)\)/.exec(style)) {
      let color;
      const name = m[1];
      const components = m[2];
      switch (name) {
        case "rgb":
        case "rgba":
          if (color = /^\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            this.r = Math.min(255, parseInt(color[1], 10)) / 255;
            this.g = Math.min(255, parseInt(color[2], 10)) / 255;
            this.b = Math.min(255, parseInt(color[3], 10)) / 255;
            handleAlpha(color[4]);
            return this;
          }
          if (color = /^\s*(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            this.r = Math.min(100, parseInt(color[1], 10)) / 100;
            this.g = Math.min(100, parseInt(color[2], 10)) / 100;
            this.b = Math.min(100, parseInt(color[3], 10)) / 100;
            handleAlpha(color[4]);
            return this;
          }
          break;
        case "hsl":
        case "hsla":
          if (color = /^\s*(\d*\.?\d+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            const h = parseFloat(color[1]) / 360;
            const s = parseInt(color[2], 10) / 100;
            const l = parseInt(color[3], 10) / 100;
            handleAlpha(color[4]);
            return this.setHSL(h, s, l);
          }
          break;
      }
    } else if (m = /^\#([A-Fa-f\d]+)$/.exec(style)) {
      const hex = m[1];
      const size = hex.length;
      if (size === 3) {
        this.r = parseInt(hex.charAt(0) + hex.charAt(0), 16) / 255;
        this.g = parseInt(hex.charAt(1) + hex.charAt(1), 16) / 255;
        this.b = parseInt(hex.charAt(2) + hex.charAt(2), 16) / 255;
        return this;
      } else if (size === 6) {
        this.r = parseInt(hex.charAt(0) + hex.charAt(1), 16) / 255;
        this.g = parseInt(hex.charAt(2) + hex.charAt(3), 16) / 255;
        this.b = parseInt(hex.charAt(4) + hex.charAt(5), 16) / 255;
        return this;
      }
    }
    if (style && style.length > 0) {
      return this.setColorName(style);
    }
    return this;
  }
  setColorName(style) {
    const hex = _colorKeywords[style.toLowerCase()];
    if (hex !== void 0) {
      this.setHex(hex);
    } else {
      console.warn("THREE.Color: Unknown color " + style);
    }
    return this;
  }
  clone() {
    return new this.constructor(this.r, this.g, this.b);
  }
  copy(color) {
    this.r = color.r;
    this.g = color.g;
    this.b = color.b;
    return this;
  }
  copySRGBToLinear(color) {
    this.r = SRGBToLinear(color.r);
    this.g = SRGBToLinear(color.g);
    this.b = SRGBToLinear(color.b);
    return this;
  }
  copyLinearToSRGB(color) {
    this.r = LinearToSRGB(color.r);
    this.g = LinearToSRGB(color.g);
    this.b = LinearToSRGB(color.b);
    return this;
  }
  convertSRGBToLinear() {
    this.copySRGBToLinear(this);
    return this;
  }
  convertLinearToSRGB() {
    this.copyLinearToSRGB(this);
    return this;
  }
  getHex() {
    return this.r * 255 << 16 ^ this.g * 255 << 8 ^ this.b * 255 << 0;
  }
  getHexString() {
    return ("000000" + this.getHex().toString(16)).slice(-6);
  }
  getHSL(target) {
    const r = this.r, g = this.g, b = this.b;
    const max = Math.max(r, g, b);
    const min = Math.min(r, g, b);
    let hue, saturation;
    const lightness = (min + max) / 2;
    if (min === max) {
      hue = 0;
      saturation = 0;
    } else {
      const delta = max - min;
      saturation = lightness <= 0.5 ? delta / (max + min) : delta / (2 - max - min);
      switch (max) {
        case r:
          hue = (g - b) / delta + (g < b ? 6 : 0);
          break;
        case g:
          hue = (b - r) / delta + 2;
          break;
        case b:
          hue = (r - g) / delta + 4;
          break;
      }
      hue /= 6;
    }
    target.h = hue;
    target.s = saturation;
    target.l = lightness;
    return target;
  }
  getStyle() {
    return "rgb(" + (this.r * 255 | 0) + "," + (this.g * 255 | 0) + "," + (this.b * 255 | 0) + ")";
  }
  offsetHSL(h, s, l) {
    this.getHSL(_hslA);
    _hslA.h += h;
    _hslA.s += s;
    _hslA.l += l;
    this.setHSL(_hslA.h, _hslA.s, _hslA.l);
    return this;
  }
  add(color) {
    this.r += color.r;
    this.g += color.g;
    this.b += color.b;
    return this;
  }
  addColors(color1, color2) {
    this.r = color1.r + color2.r;
    this.g = color1.g + color2.g;
    this.b = color1.b + color2.b;
    return this;
  }
  addScalar(s) {
    this.r += s;
    this.g += s;
    this.b += s;
    return this;
  }
  sub(color) {
    this.r = Math.max(0, this.r - color.r);
    this.g = Math.max(0, this.g - color.g);
    this.b = Math.max(0, this.b - color.b);
    return this;
  }
  multiply(color) {
    this.r *= color.r;
    this.g *= color.g;
    this.b *= color.b;
    return this;
  }
  multiplyScalar(s) {
    this.r *= s;
    this.g *= s;
    this.b *= s;
    return this;
  }
  lerp(color, alpha) {
    this.r += (color.r - this.r) * alpha;
    this.g += (color.g - this.g) * alpha;
    this.b += (color.b - this.b) * alpha;
    return this;
  }
  lerpColors(color1, color2, alpha) {
    this.r = color1.r + (color2.r - color1.r) * alpha;
    this.g = color1.g + (color2.g - color1.g) * alpha;
    this.b = color1.b + (color2.b - color1.b) * alpha;
    return this;
  }
  lerpHSL(color, alpha) {
    this.getHSL(_hslA);
    color.getHSL(_hslB);
    const h = lerp$2(_hslA.h, _hslB.h, alpha);
    const s = lerp$2(_hslA.s, _hslB.s, alpha);
    const l = lerp$2(_hslA.l, _hslB.l, alpha);
    this.setHSL(h, s, l);
    return this;
  }
  equals(c) {
    return c.r === this.r && c.g === this.g && c.b === this.b;
  }
  fromArray(array, offset = 0) {
    this.r = array[offset];
    this.g = array[offset + 1];
    this.b = array[offset + 2];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.r;
    array[offset + 1] = this.g;
    array[offset + 2] = this.b;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this.r = attribute.getX(index);
    this.g = attribute.getY(index);
    this.b = attribute.getZ(index);
    if (attribute.normalized === true) {
      this.r /= 255;
      this.g /= 255;
      this.b /= 255;
    }
    return this;
  }
  toJSON() {
    return this.getHex();
  }
}
Color.NAMES = _colorKeywords;
Color.prototype.isColor = true;
Color.prototype.r = 1;
Color.prototype.g = 1;
Color.prototype.b = 1;
let _canvas;
class ImageUtils {
  static getDataURL(image) {
    if (/^data:/i.test(image.src)) {
      return image.src;
    }
    if (typeof HTMLCanvasElement == "undefined") {
      return image.src;
    }
    let canvas;
    if (image instanceof HTMLCanvasElement) {
      canvas = image;
    } else {
      if (_canvas === void 0)
        _canvas = createElementNS("canvas");
      _canvas.width = image.width;
      _canvas.height = image.height;
      const context = _canvas.getContext("2d");
      if (image instanceof ImageData) {
        context.putImageData(image, 0, 0);
      } else {
        context.drawImage(image, 0, 0, image.width, image.height);
      }
      canvas = _canvas;
    }
    if (canvas.width > 2048 || canvas.height > 2048) {
      console.warn("THREE.ImageUtils.getDataURL: Image converted to jpg for performance reasons", image);
      return canvas.toDataURL("image/jpeg", 0.6);
    } else {
      return canvas.toDataURL("image/png");
    }
  }
  static sRGBToLinear(image) {
    if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap) {
      const canvas = createElementNS("canvas");
      canvas.width = image.width;
      canvas.height = image.height;
      const context = canvas.getContext("2d");
      context.drawImage(image, 0, 0, image.width, image.height);
      const imageData = context.getImageData(0, 0, image.width, image.height);
      const data = imageData.data;
      for (let i = 0; i < data.length; i++) {
        data[i] = SRGBToLinear(data[i] / 255) * 255;
      }
      context.putImageData(imageData, 0, 0);
      return canvas;
    } else if (image.data) {
      const data = image.data.slice(0);
      for (let i = 0; i < data.length; i++) {
        if (data instanceof Uint8Array || data instanceof Uint8ClampedArray) {
          data[i] = Math.floor(SRGBToLinear(data[i] / 255) * 255);
        } else {
          data[i] = SRGBToLinear(data[i]);
        }
      }
      return {
        data,
        width: image.width,
        height: image.height
      };
    } else {
      console.warn("THREE.ImageUtils.sRGBToLinear(): Unsupported image type. No color space conversion applied.");
      return image;
    }
  }
}
let textureId = 0;
class Texture extends EventDispatcher {
  constructor(image = Texture.DEFAULT_IMAGE, mapping = Texture.DEFAULT_MAPPING, wrapS = ClampToEdgeWrapping, wrapT = ClampToEdgeWrapping, magFilter = LinearFilter, minFilter = LinearMipmapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = 1, encoding = LinearEncoding) {
    super();
    Object.defineProperty(this, "id", {value: textureId++});
    this.uuid = generateUUID();
    this.name = "";
    this.image = image;
    this.mipmaps = [];
    this.mapping = mapping;
    this.wrapS = wrapS;
    this.wrapT = wrapT;
    this.magFilter = magFilter;
    this.minFilter = minFilter;
    this.anisotropy = anisotropy;
    this.format = format;
    this.internalFormat = null;
    this.type = type;
    this.offset = new Vector2$1(0, 0);
    this.repeat = new Vector2$1(1, 1);
    this.center = new Vector2$1(0, 0);
    this.rotation = 0;
    this.matrixAutoUpdate = true;
    this.matrix = new Matrix3$1();
    this.generateMipmaps = true;
    this.premultiplyAlpha = false;
    this.flipY = true;
    this.unpackAlignment = 4;
    this.encoding = encoding;
    this.userData = {};
    this.version = 0;
    this.onUpdate = null;
    this.isRenderTargetTexture = false;
    this.needsPMREMUpdate = false;
  }
  updateMatrix() {
    this.matrix.setUvTransform(this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.name = source.name;
    this.image = source.image;
    this.mipmaps = source.mipmaps.slice(0);
    this.mapping = source.mapping;
    this.wrapS = source.wrapS;
    this.wrapT = source.wrapT;
    this.magFilter = source.magFilter;
    this.minFilter = source.minFilter;
    this.anisotropy = source.anisotropy;
    this.format = source.format;
    this.internalFormat = source.internalFormat;
    this.type = source.type;
    this.offset.copy(source.offset);
    this.repeat.copy(source.repeat);
    this.center.copy(source.center);
    this.rotation = source.rotation;
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    this.matrix.copy(source.matrix);
    this.generateMipmaps = source.generateMipmaps;
    this.premultiplyAlpha = source.premultiplyAlpha;
    this.flipY = source.flipY;
    this.unpackAlignment = source.unpackAlignment;
    this.encoding = source.encoding;
    this.userData = JSON.parse(JSON.stringify(source.userData));
    return this;
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    if (!isRootObject && meta.textures[this.uuid] !== void 0) {
      return meta.textures[this.uuid];
    }
    const output = {
      metadata: {
        version: 4.5,
        type: "Texture",
        generator: "Texture.toJSON"
      },
      uuid: this.uuid,
      name: this.name,
      mapping: this.mapping,
      repeat: [this.repeat.x, this.repeat.y],
      offset: [this.offset.x, this.offset.y],
      center: [this.center.x, this.center.y],
      rotation: this.rotation,
      wrap: [this.wrapS, this.wrapT],
      format: this.format,
      type: this.type,
      encoding: this.encoding,
      minFilter: this.minFilter,
      magFilter: this.magFilter,
      anisotropy: this.anisotropy,
      flipY: this.flipY,
      premultiplyAlpha: this.premultiplyAlpha,
      unpackAlignment: this.unpackAlignment
    };
    if (this.image !== void 0) {
      const image = this.image;
      if (image.uuid === void 0) {
        image.uuid = generateUUID();
      }
      if (!isRootObject && meta.images[image.uuid] === void 0) {
        let url;
        if (Array.isArray(image)) {
          url = [];
          for (let i = 0, l = image.length; i < l; i++) {
            if (image[i].isDataTexture) {
              url.push(serializeImage(image[i].image));
            } else {
              url.push(serializeImage(image[i]));
            }
          }
        } else {
          url = serializeImage(image);
        }
        meta.images[image.uuid] = {
          uuid: image.uuid,
          url
        };
      }
      output.image = image.uuid;
    }
    if (JSON.stringify(this.userData) !== "{}")
      output.userData = this.userData;
    if (!isRootObject) {
      meta.textures[this.uuid] = output;
    }
    return output;
  }
  dispose() {
    this.dispatchEvent({type: "dispose"});
  }
  transformUv(uv) {
    if (this.mapping !== UVMapping)
      return uv;
    uv.applyMatrix3(this.matrix);
    if (uv.x < 0 || uv.x > 1) {
      switch (this.wrapS) {
        case RepeatWrapping:
          uv.x = uv.x - Math.floor(uv.x);
          break;
        case ClampToEdgeWrapping:
          uv.x = uv.x < 0 ? 0 : 1;
          break;
        case MirroredRepeatWrapping:
          if (Math.abs(Math.floor(uv.x) % 2) === 1) {
            uv.x = Math.ceil(uv.x) - uv.x;
          } else {
            uv.x = uv.x - Math.floor(uv.x);
          }
          break;
      }
    }
    if (uv.y < 0 || uv.y > 1) {
      switch (this.wrapT) {
        case RepeatWrapping:
          uv.y = uv.y - Math.floor(uv.y);
          break;
        case ClampToEdgeWrapping:
          uv.y = uv.y < 0 ? 0 : 1;
          break;
        case MirroredRepeatWrapping:
          if (Math.abs(Math.floor(uv.y) % 2) === 1) {
            uv.y = Math.ceil(uv.y) - uv.y;
          } else {
            uv.y = uv.y - Math.floor(uv.y);
          }
          break;
      }
    }
    if (this.flipY) {
      uv.y = 1 - uv.y;
    }
    return uv;
  }
  set needsUpdate(value) {
    if (value === true)
      this.version++;
  }
}
Texture.DEFAULT_IMAGE = void 0;
Texture.DEFAULT_MAPPING = UVMapping;
Texture.prototype.isTexture = true;
function serializeImage(image) {
  if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap) {
    return ImageUtils.getDataURL(image);
  } else {
    if (image.data) {
      return {
        data: Array.prototype.slice.call(image.data),
        width: image.width,
        height: image.height,
        type: image.data.constructor.name
      };
    } else {
      console.warn("THREE.Texture: Unable to serialize Texture.");
      return {};
    }
  }
}
class Vector4$1 {
  constructor(x = 0, y = 0, z = 0, w = 1) {
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
  }
  get width() {
    return this.z;
  }
  set width(value) {
    this.z = value;
  }
  get height() {
    return this.w;
  }
  set height(value) {
    this.w = value;
  }
  set(x, y, z, w) {
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    this.z = scalar;
    this.w = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setZ(z) {
    this.z = z;
    return this;
  }
  setW(w) {
    this.w = w;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      case 2:
        this.z = value;
        break;
      case 3:
        this.w = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      case 2:
        return this.z;
      case 3:
        return this.w;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y, this.z, this.w);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    this.w = v.w !== void 0 ? v.w : 1;
    return this;
  }
  add(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.");
      return this.addVectors(v, w);
    }
    this.x += v.x;
    this.y += v.y;
    this.z += v.z;
    this.w += v.w;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    this.z += s;
    this.w += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    this.z = a.z + b.z;
    this.w = a.w + b.w;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    this.z += v.z * s;
    this.w += v.w * s;
    return this;
  }
  sub(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.");
      return this.subVectors(v, w);
    }
    this.x -= v.x;
    this.y -= v.y;
    this.z -= v.z;
    this.w -= v.w;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    this.z -= s;
    this.w -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    this.z = a.z - b.z;
    this.w = a.w - b.w;
    return this;
  }
  multiply(v) {
    this.x *= v.x;
    this.y *= v.y;
    this.z *= v.z;
    this.w *= v.w;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    this.z *= scalar;
    this.w *= scalar;
    return this;
  }
  applyMatrix4(m) {
    const x = this.x, y = this.y, z = this.z, w = this.w;
    const e = m.elements;
    this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;
    this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;
    this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;
    this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  setAxisAngleFromQuaternion(q) {
    this.w = 2 * Math.acos(q.w);
    const s = Math.sqrt(1 - q.w * q.w);
    if (s < 1e-4) {
      this.x = 1;
      this.y = 0;
      this.z = 0;
    } else {
      this.x = q.x / s;
      this.y = q.y / s;
      this.z = q.z / s;
    }
    return this;
  }
  setAxisAngleFromRotationMatrix(m) {
    let angle, x, y, z;
    const epsilon = 0.01, epsilon2 = 0.1, te = m.elements, m11 = te[0], m12 = te[4], m13 = te[8], m21 = te[1], m22 = te[5], m23 = te[9], m31 = te[2], m32 = te[6], m33 = te[10];
    if (Math.abs(m12 - m21) < epsilon && Math.abs(m13 - m31) < epsilon && Math.abs(m23 - m32) < epsilon) {
      if (Math.abs(m12 + m21) < epsilon2 && Math.abs(m13 + m31) < epsilon2 && Math.abs(m23 + m32) < epsilon2 && Math.abs(m11 + m22 + m33 - 3) < epsilon2) {
        this.set(1, 0, 0, 0);
        return this;
      }
      angle = Math.PI;
      const xx = (m11 + 1) / 2;
      const yy = (m22 + 1) / 2;
      const zz = (m33 + 1) / 2;
      const xy = (m12 + m21) / 4;
      const xz = (m13 + m31) / 4;
      const yz = (m23 + m32) / 4;
      if (xx > yy && xx > zz) {
        if (xx < epsilon) {
          x = 0;
          y = 0.707106781;
          z = 0.707106781;
        } else {
          x = Math.sqrt(xx);
          y = xy / x;
          z = xz / x;
        }
      } else if (yy > zz) {
        if (yy < epsilon) {
          x = 0.707106781;
          y = 0;
          z = 0.707106781;
        } else {
          y = Math.sqrt(yy);
          x = xy / y;
          z = yz / y;
        }
      } else {
        if (zz < epsilon) {
          x = 0.707106781;
          y = 0.707106781;
          z = 0;
        } else {
          z = Math.sqrt(zz);
          x = xz / z;
          y = yz / z;
        }
      }
      this.set(x, y, z, angle);
      return this;
    }
    let s = Math.sqrt((m32 - m23) * (m32 - m23) + (m13 - m31) * (m13 - m31) + (m21 - m12) * (m21 - m12));
    if (Math.abs(s) < 1e-3)
      s = 1;
    this.x = (m32 - m23) / s;
    this.y = (m13 - m31) / s;
    this.z = (m21 - m12) / s;
    this.w = Math.acos((m11 + m22 + m33 - 1) / 2);
    return this;
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    this.z = Math.min(this.z, v.z);
    this.w = Math.min(this.w, v.w);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    this.z = Math.max(this.z, v.z);
    this.w = Math.max(this.w, v.w);
    return this;
  }
  clamp(min, max) {
    this.x = Math.max(min.x, Math.min(max.x, this.x));
    this.y = Math.max(min.y, Math.min(max.y, this.y));
    this.z = Math.max(min.z, Math.min(max.z, this.z));
    this.w = Math.max(min.w, Math.min(max.w, this.w));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    this.z = Math.max(minVal, Math.min(maxVal, this.z));
    this.w = Math.max(minVal, Math.min(maxVal, this.w));
    return this;
  }
  clampLength(min, max) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    this.z = Math.floor(this.z);
    this.w = Math.floor(this.w);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    this.z = Math.ceil(this.z);
    this.w = Math.ceil(this.w);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    this.z = Math.round(this.z);
    this.w = Math.round(this.w);
    return this;
  }
  roundToZero() {
    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
    this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
    this.w = this.w < 0 ? Math.ceil(this.w) : Math.floor(this.w);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    this.z = -this.z;
    this.w = -this.w;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
  }
  lengthSq() {
    return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z) + Math.abs(this.w);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    this.z += (v.z - this.z) * alpha;
    this.w += (v.w - this.w) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    this.z = v1.z + (v2.z - v1.z) * alpha;
    this.w = v1.w + (v2.w - v1.w) * alpha;
    return this;
  }
  equals(v) {
    return v.x === this.x && v.y === this.y && v.z === this.z && v.w === this.w;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    this.z = array[offset + 2];
    this.w = array[offset + 3];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    array[offset + 2] = this.z;
    array[offset + 3] = this.w;
    return array;
  }
  fromBufferAttribute(attribute, index, offset) {
    if (offset !== void 0) {
      console.warn("THREE.Vector4: offset has been removed from .fromBufferAttribute().");
    }
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    this.z = attribute.getZ(index);
    this.w = attribute.getW(index);
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    this.z = Math.random();
    this.w = Math.random();
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
    yield this.z;
    yield this.w;
  }
}
Vector4$1.prototype.isVector4 = true;
class WebGLRenderTarget extends EventDispatcher {
  constructor(width, height, options = {}) {
    super();
    this.width = width;
    this.height = height;
    this.depth = 1;
    this.scissor = new Vector4$1(0, 0, width, height);
    this.scissorTest = false;
    this.viewport = new Vector4$1(0, 0, width, height);
    this.texture = new Texture(void 0, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding);
    this.texture.isRenderTargetTexture = true;
    this.texture.image = {width, height, depth: 1};
    this.texture.generateMipmaps = options.generateMipmaps !== void 0 ? options.generateMipmaps : false;
    this.texture.internalFormat = options.internalFormat !== void 0 ? options.internalFormat : null;
    this.texture.minFilter = options.minFilter !== void 0 ? options.minFilter : LinearFilter;
    this.depthBuffer = options.depthBuffer !== void 0 ? options.depthBuffer : true;
    this.stencilBuffer = options.stencilBuffer !== void 0 ? options.stencilBuffer : false;
    this.depthTexture = options.depthTexture !== void 0 ? options.depthTexture : null;
  }
  setTexture(texture) {
    texture.image = {
      width: this.width,
      height: this.height,
      depth: this.depth
    };
    this.texture = texture;
  }
  setSize(width, height, depth = 1) {
    if (this.width !== width || this.height !== height || this.depth !== depth) {
      this.width = width;
      this.height = height;
      this.depth = depth;
      this.texture.image.width = width;
      this.texture.image.height = height;
      this.texture.image.depth = depth;
      this.dispose();
    }
    this.viewport.set(0, 0, width, height);
    this.scissor.set(0, 0, width, height);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.width = source.width;
    this.height = source.height;
    this.depth = source.depth;
    this.viewport.copy(source.viewport);
    this.texture = source.texture.clone();
    this.texture.image = Object.assign({}, source.texture.image);
    this.depthBuffer = source.depthBuffer;
    this.stencilBuffer = source.stencilBuffer;
    this.depthTexture = source.depthTexture;
    return this;
  }
  dispose() {
    this.dispatchEvent({type: "dispose"});
  }
}
WebGLRenderTarget.prototype.isWebGLRenderTarget = true;
class WebGLMultipleRenderTargets extends WebGLRenderTarget {
  constructor(width, height, count) {
    super(width, height);
    const texture = this.texture;
    this.texture = [];
    for (let i = 0; i < count; i++) {
      this.texture[i] = texture.clone();
    }
  }
  setSize(width, height, depth = 1) {
    if (this.width !== width || this.height !== height || this.depth !== depth) {
      this.width = width;
      this.height = height;
      this.depth = depth;
      for (let i = 0, il = this.texture.length; i < il; i++) {
        this.texture[i].image.width = width;
        this.texture[i].image.height = height;
        this.texture[i].image.depth = depth;
      }
      this.dispose();
    }
    this.viewport.set(0, 0, width, height);
    this.scissor.set(0, 0, width, height);
    return this;
  }
  copy(source) {
    this.dispose();
    this.width = source.width;
    this.height = source.height;
    this.depth = source.depth;
    this.viewport.set(0, 0, this.width, this.height);
    this.scissor.set(0, 0, this.width, this.height);
    this.depthBuffer = source.depthBuffer;
    this.stencilBuffer = source.stencilBuffer;
    this.depthTexture = source.depthTexture;
    this.texture.length = 0;
    for (let i = 0, il = source.texture.length; i < il; i++) {
      this.texture[i] = source.texture[i].clone();
    }
    return this;
  }
}
WebGLMultipleRenderTargets.prototype.isWebGLMultipleRenderTargets = true;
class WebGLMultisampleRenderTarget extends WebGLRenderTarget {
  constructor(width, height, options = {}) {
    super(width, height, options);
    this.samples = 4;
    this.ignoreDepthForMultisampleCopy = options.ignoreDepth !== void 0 ? options.ignoreDepth : true;
    this.useRenderToTexture = options.useRenderToTexture !== void 0 ? options.useRenderToTexture : false;
    this.useRenderbuffer = this.useRenderToTexture === false;
  }
  copy(source) {
    super.copy.call(this, source);
    this.samples = source.samples;
    this.useRenderToTexture = source.useRenderToTexture;
    this.useRenderbuffer = source.useRenderbuffer;
    return this;
  }
}
WebGLMultisampleRenderTarget.prototype.isWebGLMultisampleRenderTarget = true;
class Quaternion$1 {
  constructor(x = 0, y = 0, z = 0, w = 1) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._w = w;
  }
  static slerp(qa, qb, qm, t) {
    console.warn("THREE.Quaternion: Static .slerp() has been deprecated. Use qm.slerpQuaternions( qa, qb, t ) instead.");
    return qm.slerpQuaternions(qa, qb, t);
  }
  static slerpFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t) {
    let x0 = src0[srcOffset0 + 0], y0 = src0[srcOffset0 + 1], z0 = src0[srcOffset0 + 2], w0 = src0[srcOffset0 + 3];
    const x1 = src1[srcOffset1 + 0], y1 = src1[srcOffset1 + 1], z1 = src1[srcOffset1 + 2], w1 = src1[srcOffset1 + 3];
    if (t === 0) {
      dst[dstOffset + 0] = x0;
      dst[dstOffset + 1] = y0;
      dst[dstOffset + 2] = z0;
      dst[dstOffset + 3] = w0;
      return;
    }
    if (t === 1) {
      dst[dstOffset + 0] = x1;
      dst[dstOffset + 1] = y1;
      dst[dstOffset + 2] = z1;
      dst[dstOffset + 3] = w1;
      return;
    }
    if (w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1) {
      let s = 1 - t;
      const cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1, dir = cos >= 0 ? 1 : -1, sqrSin = 1 - cos * cos;
      if (sqrSin > Number.EPSILON) {
        const sin = Math.sqrt(sqrSin), len = Math.atan2(sin, cos * dir);
        s = Math.sin(s * len) / sin;
        t = Math.sin(t * len) / sin;
      }
      const tDir = t * dir;
      x0 = x0 * s + x1 * tDir;
      y0 = y0 * s + y1 * tDir;
      z0 = z0 * s + z1 * tDir;
      w0 = w0 * s + w1 * tDir;
      if (s === 1 - t) {
        const f = 1 / Math.sqrt(x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0);
        x0 *= f;
        y0 *= f;
        z0 *= f;
        w0 *= f;
      }
    }
    dst[dstOffset] = x0;
    dst[dstOffset + 1] = y0;
    dst[dstOffset + 2] = z0;
    dst[dstOffset + 3] = w0;
  }
  static multiplyQuaternionsFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1) {
    const x0 = src0[srcOffset0];
    const y0 = src0[srcOffset0 + 1];
    const z0 = src0[srcOffset0 + 2];
    const w0 = src0[srcOffset0 + 3];
    const x1 = src1[srcOffset1];
    const y1 = src1[srcOffset1 + 1];
    const z1 = src1[srcOffset1 + 2];
    const w1 = src1[srcOffset1 + 3];
    dst[dstOffset] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;
    dst[dstOffset + 1] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;
    dst[dstOffset + 2] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;
    dst[dstOffset + 3] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;
    return dst;
  }
  get x() {
    return this._x;
  }
  set x(value) {
    this._x = value;
    this._onChangeCallback();
  }
  get y() {
    return this._y;
  }
  set y(value) {
    this._y = value;
    this._onChangeCallback();
  }
  get z() {
    return this._z;
  }
  set z(value) {
    this._z = value;
    this._onChangeCallback();
  }
  get w() {
    return this._w;
  }
  set w(value) {
    this._w = value;
    this._onChangeCallback();
  }
  set(x, y, z, w) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._w = w;
    this._onChangeCallback();
    return this;
  }
  clone() {
    return new this.constructor(this._x, this._y, this._z, this._w);
  }
  copy(quaternion) {
    this._x = quaternion.x;
    this._y = quaternion.y;
    this._z = quaternion.z;
    this._w = quaternion.w;
    this._onChangeCallback();
    return this;
  }
  setFromEuler(euler, update) {
    if (!(euler && euler.isEuler)) {
      throw new Error("THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.");
    }
    const x = euler._x, y = euler._y, z = euler._z, order = euler._order;
    const cos = Math.cos;
    const sin = Math.sin;
    const c1 = cos(x / 2);
    const c2 = cos(y / 2);
    const c3 = cos(z / 2);
    const s1 = sin(x / 2);
    const s2 = sin(y / 2);
    const s3 = sin(z / 2);
    switch (order) {
      case "XYZ":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "YXZ":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      case "ZXY":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "ZYX":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      case "YZX":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "XZY":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      default:
        console.warn("THREE.Quaternion: .setFromEuler() encountered an unknown order: " + order);
    }
    if (update !== false)
      this._onChangeCallback();
    return this;
  }
  setFromAxisAngle(axis, angle) {
    const halfAngle = angle / 2, s = Math.sin(halfAngle);
    this._x = axis.x * s;
    this._y = axis.y * s;
    this._z = axis.z * s;
    this._w = Math.cos(halfAngle);
    this._onChangeCallback();
    return this;
  }
  setFromRotationMatrix(m) {
    const te = m.elements, m11 = te[0], m12 = te[4], m13 = te[8], m21 = te[1], m22 = te[5], m23 = te[9], m31 = te[2], m32 = te[6], m33 = te[10], trace = m11 + m22 + m33;
    if (trace > 0) {
      const s = 0.5 / Math.sqrt(trace + 1);
      this._w = 0.25 / s;
      this._x = (m32 - m23) * s;
      this._y = (m13 - m31) * s;
      this._z = (m21 - m12) * s;
    } else if (m11 > m22 && m11 > m33) {
      const s = 2 * Math.sqrt(1 + m11 - m22 - m33);
      this._w = (m32 - m23) / s;
      this._x = 0.25 * s;
      this._y = (m12 + m21) / s;
      this._z = (m13 + m31) / s;
    } else if (m22 > m33) {
      const s = 2 * Math.sqrt(1 + m22 - m11 - m33);
      this._w = (m13 - m31) / s;
      this._x = (m12 + m21) / s;
      this._y = 0.25 * s;
      this._z = (m23 + m32) / s;
    } else {
      const s = 2 * Math.sqrt(1 + m33 - m11 - m22);
      this._w = (m21 - m12) / s;
      this._x = (m13 + m31) / s;
      this._y = (m23 + m32) / s;
      this._z = 0.25 * s;
    }
    this._onChangeCallback();
    return this;
  }
  setFromUnitVectors(vFrom, vTo) {
    let r = vFrom.dot(vTo) + 1;
    if (r < Number.EPSILON) {
      r = 0;
      if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
        this._x = -vFrom.y;
        this._y = vFrom.x;
        this._z = 0;
        this._w = r;
      } else {
        this._x = 0;
        this._y = -vFrom.z;
        this._z = vFrom.y;
        this._w = r;
      }
    } else {
      this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;
      this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;
      this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;
      this._w = r;
    }
    return this.normalize();
  }
  angleTo(q) {
    return 2 * Math.acos(Math.abs(clamp$2(this.dot(q), -1, 1)));
  }
  rotateTowards(q, step) {
    const angle = this.angleTo(q);
    if (angle === 0)
      return this;
    const t = Math.min(1, step / angle);
    this.slerp(q, t);
    return this;
  }
  identity() {
    return this.set(0, 0, 0, 1);
  }
  invert() {
    return this.conjugate();
  }
  conjugate() {
    this._x *= -1;
    this._y *= -1;
    this._z *= -1;
    this._onChangeCallback();
    return this;
  }
  dot(v) {
    return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;
  }
  lengthSq() {
    return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;
  }
  length() {
    return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);
  }
  normalize() {
    let l = this.length();
    if (l === 0) {
      this._x = 0;
      this._y = 0;
      this._z = 0;
      this._w = 1;
    } else {
      l = 1 / l;
      this._x = this._x * l;
      this._y = this._y * l;
      this._z = this._z * l;
      this._w = this._w * l;
    }
    this._onChangeCallback();
    return this;
  }
  multiply(q, p) {
    if (p !== void 0) {
      console.warn("THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.");
      return this.multiplyQuaternions(q, p);
    }
    return this.multiplyQuaternions(this, q);
  }
  premultiply(q) {
    return this.multiplyQuaternions(q, this);
  }
  multiplyQuaternions(a, b) {
    const qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
    const qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;
    this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
    this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
    this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
    this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;
    this._onChangeCallback();
    return this;
  }
  slerp(qb, t) {
    if (t === 0)
      return this;
    if (t === 1)
      return this.copy(qb);
    const x = this._x, y = this._y, z = this._z, w = this._w;
    let cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;
    if (cosHalfTheta < 0) {
      this._w = -qb._w;
      this._x = -qb._x;
      this._y = -qb._y;
      this._z = -qb._z;
      cosHalfTheta = -cosHalfTheta;
    } else {
      this.copy(qb);
    }
    if (cosHalfTheta >= 1) {
      this._w = w;
      this._x = x;
      this._y = y;
      this._z = z;
      return this;
    }
    const sqrSinHalfTheta = 1 - cosHalfTheta * cosHalfTheta;
    if (sqrSinHalfTheta <= Number.EPSILON) {
      const s = 1 - t;
      this._w = s * w + t * this._w;
      this._x = s * x + t * this._x;
      this._y = s * y + t * this._y;
      this._z = s * z + t * this._z;
      this.normalize();
      this._onChangeCallback();
      return this;
    }
    const sinHalfTheta = Math.sqrt(sqrSinHalfTheta);
    const halfTheta = Math.atan2(sinHalfTheta, cosHalfTheta);
    const ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta, ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
    this._w = w * ratioA + this._w * ratioB;
    this._x = x * ratioA + this._x * ratioB;
    this._y = y * ratioA + this._y * ratioB;
    this._z = z * ratioA + this._z * ratioB;
    this._onChangeCallback();
    return this;
  }
  slerpQuaternions(qa, qb, t) {
    return this.copy(qa).slerp(qb, t);
  }
  random() {
    const u1 = Math.random();
    const sqrt1u1 = Math.sqrt(1 - u1);
    const sqrtu1 = Math.sqrt(u1);
    const u2 = 2 * Math.PI * Math.random();
    const u3 = 2 * Math.PI * Math.random();
    return this.set(sqrt1u1 * Math.cos(u2), sqrtu1 * Math.sin(u3), sqrtu1 * Math.cos(u3), sqrt1u1 * Math.sin(u2));
  }
  equals(quaternion) {
    return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;
  }
  fromArray(array, offset = 0) {
    this._x = array[offset];
    this._y = array[offset + 1];
    this._z = array[offset + 2];
    this._w = array[offset + 3];
    this._onChangeCallback();
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this._x;
    array[offset + 1] = this._y;
    array[offset + 2] = this._z;
    array[offset + 3] = this._w;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this._x = attribute.getX(index);
    this._y = attribute.getY(index);
    this._z = attribute.getZ(index);
    this._w = attribute.getW(index);
    return this;
  }
  _onChange(callback) {
    this._onChangeCallback = callback;
    return this;
  }
  _onChangeCallback() {
  }
}
Quaternion$1.prototype.isQuaternion = true;
class Vector3$1 {
  constructor(x = 0, y = 0, z = 0) {
    this.x = x;
    this.y = y;
    this.z = z;
  }
  set(x, y, z) {
    if (z === void 0)
      z = this.z;
    this.x = x;
    this.y = y;
    this.z = z;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    this.z = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setZ(z) {
    this.z = z;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      case 2:
        this.z = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      case 2:
        return this.z;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y, this.z);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    return this;
  }
  add(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.");
      return this.addVectors(v, w);
    }
    this.x += v.x;
    this.y += v.y;
    this.z += v.z;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    this.z += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    this.z = a.z + b.z;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    this.z += v.z * s;
    return this;
  }
  sub(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.");
      return this.subVectors(v, w);
    }
    this.x -= v.x;
    this.y -= v.y;
    this.z -= v.z;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    this.z -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    this.z = a.z - b.z;
    return this;
  }
  multiply(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.");
      return this.multiplyVectors(v, w);
    }
    this.x *= v.x;
    this.y *= v.y;
    this.z *= v.z;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    this.z *= scalar;
    return this;
  }
  multiplyVectors(a, b) {
    this.x = a.x * b.x;
    this.y = a.y * b.y;
    this.z = a.z * b.z;
    return this;
  }
  applyEuler(euler) {
    if (!(euler && euler.isEuler)) {
      console.error("THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.");
    }
    return this.applyQuaternion(_quaternion$4.setFromEuler(euler));
  }
  applyAxisAngle(axis, angle) {
    return this.applyQuaternion(_quaternion$4.setFromAxisAngle(axis, angle));
  }
  applyMatrix3(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    this.x = e[0] * x + e[3] * y + e[6] * z;
    this.y = e[1] * x + e[4] * y + e[7] * z;
    this.z = e[2] * x + e[5] * y + e[8] * z;
    return this;
  }
  applyNormalMatrix(m) {
    return this.applyMatrix3(m).normalize();
  }
  applyMatrix4(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    const w = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]);
    this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * w;
    this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * w;
    this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * w;
    return this;
  }
  applyQuaternion(q) {
    const x = this.x, y = this.y, z = this.z;
    const qx = q.x, qy = q.y, qz = q.z, qw = q.w;
    const ix = qw * x + qy * z - qz * y;
    const iy = qw * y + qz * x - qx * z;
    const iz = qw * z + qx * y - qy * x;
    const iw = -qx * x - qy * y - qz * z;
    this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
    this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
    this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
    return this;
  }
  project(camera) {
    return this.applyMatrix4(camera.matrixWorldInverse).applyMatrix4(camera.projectionMatrix);
  }
  unproject(camera) {
    return this.applyMatrix4(camera.projectionMatrixInverse).applyMatrix4(camera.matrixWorld);
  }
  transformDirection(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    this.x = e[0] * x + e[4] * y + e[8] * z;
    this.y = e[1] * x + e[5] * y + e[9] * z;
    this.z = e[2] * x + e[6] * y + e[10] * z;
    return this.normalize();
  }
  divide(v) {
    this.x /= v.x;
    this.y /= v.y;
    this.z /= v.z;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    this.z = Math.min(this.z, v.z);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    this.z = Math.max(this.z, v.z);
    return this;
  }
  clamp(min, max) {
    this.x = Math.max(min.x, Math.min(max.x, this.x));
    this.y = Math.max(min.y, Math.min(max.y, this.y));
    this.z = Math.max(min.z, Math.min(max.z, this.z));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    this.z = Math.max(minVal, Math.min(maxVal, this.z));
    return this;
  }
  clampLength(min, max) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    this.z = Math.floor(this.z);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    this.z = Math.ceil(this.z);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    this.z = Math.round(this.z);
    return this;
  }
  roundToZero() {
    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
    this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    this.z = -this.z;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y + this.z * v.z;
  }
  lengthSq() {
    return this.x * this.x + this.y * this.y + this.z * this.z;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    this.z += (v.z - this.z) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    this.z = v1.z + (v2.z - v1.z) * alpha;
    return this;
  }
  cross(v, w) {
    if (w !== void 0) {
      console.warn("THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.");
      return this.crossVectors(v, w);
    }
    return this.crossVectors(this, v);
  }
  crossVectors(a, b) {
    const ax = a.x, ay = a.y, az = a.z;
    const bx = b.x, by = b.y, bz = b.z;
    this.x = ay * bz - az * by;
    this.y = az * bx - ax * bz;
    this.z = ax * by - ay * bx;
    return this;
  }
  projectOnVector(v) {
    const denominator = v.lengthSq();
    if (denominator === 0)
      return this.set(0, 0, 0);
    const scalar = v.dot(this) / denominator;
    return this.copy(v).multiplyScalar(scalar);
  }
  projectOnPlane(planeNormal) {
    _vector$c.copy(this).projectOnVector(planeNormal);
    return this.sub(_vector$c);
  }
  reflect(normal) {
    return this.sub(_vector$c.copy(normal).multiplyScalar(2 * this.dot(normal)));
  }
  angleTo(v) {
    const denominator = Math.sqrt(this.lengthSq() * v.lengthSq());
    if (denominator === 0)
      return Math.PI / 2;
    const theta = this.dot(v) / denominator;
    return Math.acos(clamp$2(theta, -1, 1));
  }
  distanceTo(v) {
    return Math.sqrt(this.distanceToSquared(v));
  }
  distanceToSquared(v) {
    const dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;
    return dx * dx + dy * dy + dz * dz;
  }
  manhattanDistanceTo(v) {
    return Math.abs(this.x - v.x) + Math.abs(this.y - v.y) + Math.abs(this.z - v.z);
  }
  setFromSpherical(s) {
    return this.setFromSphericalCoords(s.radius, s.phi, s.theta);
  }
  setFromSphericalCoords(radius, phi, theta) {
    const sinPhiRadius = Math.sin(phi) * radius;
    this.x = sinPhiRadius * Math.sin(theta);
    this.y = Math.cos(phi) * radius;
    this.z = sinPhiRadius * Math.cos(theta);
    return this;
  }
  setFromCylindrical(c) {
    return this.setFromCylindricalCoords(c.radius, c.theta, c.y);
  }
  setFromCylindricalCoords(radius, theta, y) {
    this.x = radius * Math.sin(theta);
    this.y = y;
    this.z = radius * Math.cos(theta);
    return this;
  }
  setFromMatrixPosition(m) {
    const e = m.elements;
    this.x = e[12];
    this.y = e[13];
    this.z = e[14];
    return this;
  }
  setFromMatrixScale(m) {
    const sx = this.setFromMatrixColumn(m, 0).length();
    const sy = this.setFromMatrixColumn(m, 1).length();
    const sz = this.setFromMatrixColumn(m, 2).length();
    this.x = sx;
    this.y = sy;
    this.z = sz;
    return this;
  }
  setFromMatrixColumn(m, index) {
    return this.fromArray(m.elements, index * 4);
  }
  setFromMatrix3Column(m, index) {
    return this.fromArray(m.elements, index * 3);
  }
  equals(v) {
    return v.x === this.x && v.y === this.y && v.z === this.z;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    this.z = array[offset + 2];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    array[offset + 2] = this.z;
    return array;
  }
  fromBufferAttribute(attribute, index, offset) {
    if (offset !== void 0) {
      console.warn("THREE.Vector3: offset has been removed from .fromBufferAttribute().");
    }
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    this.z = attribute.getZ(index);
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    this.z = Math.random();
    return this;
  }
  randomDirection() {
    const u = (Math.random() - 0.5) * 2;
    const t = Math.random() * Math.PI * 2;
    const f = Math.sqrt(1 - u ** 2);
    this.x = f * Math.cos(t);
    this.y = f * Math.sin(t);
    this.z = u;
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
    yield this.z;
  }
}
Vector3$1.prototype.isVector3 = true;
const _vector$c = /* @__PURE__ */ new Vector3$1();
const _quaternion$4 = /* @__PURE__ */ new Quaternion$1();
class Box3 {
  constructor(min = new Vector3$1(Infinity, Infinity, Infinity), max = new Vector3$1(-Infinity, -Infinity, -Infinity)) {
    this.min = min;
    this.max = max;
  }
  set(min, max) {
    this.min.copy(min);
    this.max.copy(max);
    return this;
  }
  setFromArray(array) {
    let minX = Infinity;
    let minY = Infinity;
    let minZ = Infinity;
    let maxX = -Infinity;
    let maxY = -Infinity;
    let maxZ = -Infinity;
    for (let i = 0, l = array.length; i < l; i += 3) {
      const x = array[i];
      const y = array[i + 1];
      const z = array[i + 2];
      if (x < minX)
        minX = x;
      if (y < minY)
        minY = y;
      if (z < minZ)
        minZ = z;
      if (x > maxX)
        maxX = x;
      if (y > maxY)
        maxY = y;
      if (z > maxZ)
        maxZ = z;
    }
    this.min.set(minX, minY, minZ);
    this.max.set(maxX, maxY, maxZ);
    return this;
  }
  setFromBufferAttribute(attribute) {
    let minX = Infinity;
    let minY = Infinity;
    let minZ = Infinity;
    let maxX = -Infinity;
    let maxY = -Infinity;
    let maxZ = -Infinity;
    for (let i = 0, l = attribute.count; i < l; i++) {
      const x = attribute.getX(i);
      const y = attribute.getY(i);
      const z = attribute.getZ(i);
      if (x < minX)
        minX = x;
      if (y < minY)
        minY = y;
      if (z < minZ)
        minZ = z;
      if (x > maxX)
        maxX = x;
      if (y > maxY)
        maxY = y;
      if (z > maxZ)
        maxZ = z;
    }
    this.min.set(minX, minY, minZ);
    this.max.set(maxX, maxY, maxZ);
    return this;
  }
  setFromPoints(points) {
    this.makeEmpty();
    for (let i = 0, il = points.length; i < il; i++) {
      this.expandByPoint(points[i]);
    }
    return this;
  }
  setFromCenterAndSize(center, size) {
    const halfSize = _vector$b.copy(size).multiplyScalar(0.5);
    this.min.copy(center).sub(halfSize);
    this.max.copy(center).add(halfSize);
    return this;
  }
  setFromObject(object, precise = false) {
    this.makeEmpty();
    return this.expandByObject(object, precise);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(box) {
    this.min.copy(box.min);
    this.max.copy(box.max);
    return this;
  }
  makeEmpty() {
    this.min.x = this.min.y = this.min.z = Infinity;
    this.max.x = this.max.y = this.max.z = -Infinity;
    return this;
  }
  isEmpty() {
    return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;
  }
  getCenter(target) {
    return this.isEmpty() ? target.set(0, 0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
  }
  getSize(target) {
    return this.isEmpty() ? target.set(0, 0, 0) : target.subVectors(this.max, this.min);
  }
  expandByPoint(point) {
    this.min.min(point);
    this.max.max(point);
    return this;
  }
  expandByVector(vector) {
    this.min.sub(vector);
    this.max.add(vector);
    return this;
  }
  expandByScalar(scalar) {
    this.min.addScalar(-scalar);
    this.max.addScalar(scalar);
    return this;
  }
  expandByObject(object, precise = false) {
    object.updateWorldMatrix(false, false);
    const geometry = object.geometry;
    if (geometry !== void 0) {
      if (precise && geometry.attributes != void 0 && geometry.attributes.position !== void 0) {
        const position = geometry.attributes.position;
        for (let i = 0, l = position.count; i < l; i++) {
          _vector$b.fromBufferAttribute(position, i).applyMatrix4(object.matrixWorld);
          this.expandByPoint(_vector$b);
        }
      } else {
        if (geometry.boundingBox === null) {
          geometry.computeBoundingBox();
        }
        _box$3.copy(geometry.boundingBox);
        _box$3.applyMatrix4(object.matrixWorld);
        this.union(_box$3);
      }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      this.expandByObject(children[i], precise);
    }
    return this;
  }
  containsPoint(point) {
    return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y || point.z < this.min.z || point.z > this.max.z ? false : true;
  }
  containsBox(box) {
    return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y && this.min.z <= box.min.z && box.max.z <= this.max.z;
  }
  getParameter(point, target) {
    return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y), (point.z - this.min.z) / (this.max.z - this.min.z));
  }
  intersectsBox(box) {
    return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y || box.max.z < this.min.z || box.min.z > this.max.z ? false : true;
  }
  intersectsSphere(sphere) {
    this.clampPoint(sphere.center, _vector$b);
    return _vector$b.distanceToSquared(sphere.center) <= sphere.radius * sphere.radius;
  }
  intersectsPlane(plane) {
    let min, max;
    if (plane.normal.x > 0) {
      min = plane.normal.x * this.min.x;
      max = plane.normal.x * this.max.x;
    } else {
      min = plane.normal.x * this.max.x;
      max = plane.normal.x * this.min.x;
    }
    if (plane.normal.y > 0) {
      min += plane.normal.y * this.min.y;
      max += plane.normal.y * this.max.y;
    } else {
      min += plane.normal.y * this.max.y;
      max += plane.normal.y * this.min.y;
    }
    if (plane.normal.z > 0) {
      min += plane.normal.z * this.min.z;
      max += plane.normal.z * this.max.z;
    } else {
      min += plane.normal.z * this.max.z;
      max += plane.normal.z * this.min.z;
    }
    return min <= -plane.constant && max >= -plane.constant;
  }
  intersectsTriangle(triangle) {
    if (this.isEmpty()) {
      return false;
    }
    this.getCenter(_center);
    _extents.subVectors(this.max, _center);
    _v0$2.subVectors(triangle.a, _center);
    _v1$7.subVectors(triangle.b, _center);
    _v2$3.subVectors(triangle.c, _center);
    _f0.subVectors(_v1$7, _v0$2);
    _f1.subVectors(_v2$3, _v1$7);
    _f2.subVectors(_v0$2, _v2$3);
    let axes = [
      0,
      -_f0.z,
      _f0.y,
      0,
      -_f1.z,
      _f1.y,
      0,
      -_f2.z,
      _f2.y,
      _f0.z,
      0,
      -_f0.x,
      _f1.z,
      0,
      -_f1.x,
      _f2.z,
      0,
      -_f2.x,
      -_f0.y,
      _f0.x,
      0,
      -_f1.y,
      _f1.x,
      0,
      -_f2.y,
      _f2.x,
      0
    ];
    if (!satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents)) {
      return false;
    }
    axes = [1, 0, 0, 0, 1, 0, 0, 0, 1];
    if (!satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents)) {
      return false;
    }
    _triangleNormal.crossVectors(_f0, _f1);
    axes = [_triangleNormal.x, _triangleNormal.y, _triangleNormal.z];
    return satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents);
  }
  clampPoint(point, target) {
    return target.copy(point).clamp(this.min, this.max);
  }
  distanceToPoint(point) {
    const clampedPoint = _vector$b.copy(point).clamp(this.min, this.max);
    return clampedPoint.sub(point).length();
  }
  getBoundingSphere(target) {
    this.getCenter(target.center);
    target.radius = this.getSize(_vector$b).length() * 0.5;
    return target;
  }
  intersect(box) {
    this.min.max(box.min);
    this.max.min(box.max);
    if (this.isEmpty())
      this.makeEmpty();
    return this;
  }
  union(box) {
    this.min.min(box.min);
    this.max.max(box.max);
    return this;
  }
  applyMatrix4(matrix) {
    if (this.isEmpty())
      return this;
    _points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix);
    _points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix);
    _points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix);
    _points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix);
    _points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix);
    _points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix);
    _points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix);
    _points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix);
    this.setFromPoints(_points);
    return this;
  }
  translate(offset) {
    this.min.add(offset);
    this.max.add(offset);
    return this;
  }
  equals(box) {
    return box.min.equals(this.min) && box.max.equals(this.max);
  }
}
Box3.prototype.isBox3 = true;
const _points = [
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1(),
  /* @__PURE__ */ new Vector3$1()
];
const _vector$b = /* @__PURE__ */ new Vector3$1();
const _box$3 = /* @__PURE__ */ new Box3();
const _v0$2 = /* @__PURE__ */ new Vector3$1();
const _v1$7 = /* @__PURE__ */ new Vector3$1();
const _v2$3 = /* @__PURE__ */ new Vector3$1();
const _f0 = /* @__PURE__ */ new Vector3$1();
const _f1 = /* @__PURE__ */ new Vector3$1();
const _f2 = /* @__PURE__ */ new Vector3$1();
const _center = /* @__PURE__ */ new Vector3$1();
const _extents = /* @__PURE__ */ new Vector3$1();
const _triangleNormal = /* @__PURE__ */ new Vector3$1();
const _testAxis = /* @__PURE__ */ new Vector3$1();
function satForAxes(axes, v0, v1, v2, extents) {
  for (let i = 0, j = axes.length - 3; i <= j; i += 3) {
    _testAxis.fromArray(axes, i);
    const r = extents.x * Math.abs(_testAxis.x) + extents.y * Math.abs(_testAxis.y) + extents.z * Math.abs(_testAxis.z);
    const p0 = v0.dot(_testAxis);
    const p1 = v1.dot(_testAxis);
    const p2 = v2.dot(_testAxis);
    if (Math.max(-Math.max(p0, p1, p2), Math.min(p0, p1, p2)) > r) {
      return false;
    }
  }
  return true;
}
const _box$2 = /* @__PURE__ */ new Box3();
const _v1$6 = /* @__PURE__ */ new Vector3$1();
const _toFarthestPoint = /* @__PURE__ */ new Vector3$1();
const _toPoint = /* @__PURE__ */ new Vector3$1();
class Sphere {
  constructor(center = new Vector3$1(), radius = -1) {
    this.center = center;
    this.radius = radius;
  }
  set(center, radius) {
    this.center.copy(center);
    this.radius = radius;
    return this;
  }
  setFromPoints(points, optionalCenter) {
    const center = this.center;
    if (optionalCenter !== void 0) {
      center.copy(optionalCenter);
    } else {
      _box$2.setFromPoints(points).getCenter(center);
    }
    let maxRadiusSq = 0;
    for (let i = 0, il = points.length; i < il; i++) {
      maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(points[i]));
    }
    this.radius = Math.sqrt(maxRadiusSq);
    return this;
  }
  copy(sphere) {
    this.center.copy(sphere.center);
    this.radius = sphere.radius;
    return this;
  }
  isEmpty() {
    return this.radius < 0;
  }
  makeEmpty() {
    this.center.set(0, 0, 0);
    this.radius = -1;
    return this;
  }
  containsPoint(point) {
    return point.distanceToSquared(this.center) <= this.radius * this.radius;
  }
  distanceToPoint(point) {
    return point.distanceTo(this.center) - this.radius;
  }
  intersectsSphere(sphere) {
    const radiusSum = this.radius + sphere.radius;
    return sphere.center.distanceToSquared(this.center) <= radiusSum * radiusSum;
  }
  intersectsBox(box) {
    return box.intersectsSphere(this);
  }
  intersectsPlane(plane) {
    return Math.abs(plane.distanceToPoint(this.center)) <= this.radius;
  }
  clampPoint(point, target) {
    const deltaLengthSq = this.center.distanceToSquared(point);
    target.copy(point);
    if (deltaLengthSq > this.radius * this.radius) {
      target.sub(this.center).normalize();
      target.multiplyScalar(this.radius).add(this.center);
    }
    return target;
  }
  getBoundingBox(target) {
    if (this.isEmpty()) {
      target.makeEmpty();
      return target;
    }
    target.set(this.center, this.center);
    target.expandByScalar(this.radius);
    return target;
  }
  applyMatrix4(matrix) {
    this.center.applyMatrix4(matrix);
    this.radius = this.radius * matrix.getMaxScaleOnAxis();
    return this;
  }
  translate(offset) {
    this.center.add(offset);
    return this;
  }
  expandByPoint(point) {
    _toPoint.subVectors(point, this.center);
    const lengthSq = _toPoint.lengthSq();
    if (lengthSq > this.radius * this.radius) {
      const length = Math.sqrt(lengthSq);
      const missingRadiusHalf = (length - this.radius) * 0.5;
      this.center.add(_toPoint.multiplyScalar(missingRadiusHalf / length));
      this.radius += missingRadiusHalf;
    }
    return this;
  }
  union(sphere) {
    if (this.center.equals(sphere.center) === true) {
      _toFarthestPoint.set(0, 0, 1).multiplyScalar(sphere.radius);
    } else {
      _toFarthestPoint.subVectors(sphere.center, this.center).normalize().multiplyScalar(sphere.radius);
    }
    this.expandByPoint(_v1$6.copy(sphere.center).add(_toFarthestPoint));
    this.expandByPoint(_v1$6.copy(sphere.center).sub(_toFarthestPoint));
    return this;
  }
  equals(sphere) {
    return sphere.center.equals(this.center) && sphere.radius === this.radius;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
const _vector$a = /* @__PURE__ */ new Vector3$1();
const _segCenter = /* @__PURE__ */ new Vector3$1();
const _segDir = /* @__PURE__ */ new Vector3$1();
const _diff = /* @__PURE__ */ new Vector3$1();
const _edge1 = /* @__PURE__ */ new Vector3$1();
const _edge2 = /* @__PURE__ */ new Vector3$1();
const _normal$1 = /* @__PURE__ */ new Vector3$1();
class Ray {
  constructor(origin = new Vector3$1(), direction = new Vector3$1(0, 0, -1)) {
    this.origin = origin;
    this.direction = direction;
  }
  set(origin, direction) {
    this.origin.copy(origin);
    this.direction.copy(direction);
    return this;
  }
  copy(ray) {
    this.origin.copy(ray.origin);
    this.direction.copy(ray.direction);
    return this;
  }
  at(t, target) {
    return target.copy(this.direction).multiplyScalar(t).add(this.origin);
  }
  lookAt(v) {
    this.direction.copy(v).sub(this.origin).normalize();
    return this;
  }
  recast(t) {
    this.origin.copy(this.at(t, _vector$a));
    return this;
  }
  closestPointToPoint(point, target) {
    target.subVectors(point, this.origin);
    const directionDistance = target.dot(this.direction);
    if (directionDistance < 0) {
      return target.copy(this.origin);
    }
    return target.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);
  }
  distanceToPoint(point) {
    return Math.sqrt(this.distanceSqToPoint(point));
  }
  distanceSqToPoint(point) {
    const directionDistance = _vector$a.subVectors(point, this.origin).dot(this.direction);
    if (directionDistance < 0) {
      return this.origin.distanceToSquared(point);
    }
    _vector$a.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);
    return _vector$a.distanceToSquared(point);
  }
  distanceSqToSegment(v0, v1, optionalPointOnRay, optionalPointOnSegment) {
    _segCenter.copy(v0).add(v1).multiplyScalar(0.5);
    _segDir.copy(v1).sub(v0).normalize();
    _diff.copy(this.origin).sub(_segCenter);
    const segExtent = v0.distanceTo(v1) * 0.5;
    const a01 = -this.direction.dot(_segDir);
    const b0 = _diff.dot(this.direction);
    const b1 = -_diff.dot(_segDir);
    const c = _diff.lengthSq();
    const det = Math.abs(1 - a01 * a01);
    let s0, s1, sqrDist, extDet;
    if (det > 0) {
      s0 = a01 * b1 - b0;
      s1 = a01 * b0 - b1;
      extDet = segExtent * det;
      if (s0 >= 0) {
        if (s1 >= -extDet) {
          if (s1 <= extDet) {
            const invDet = 1 / det;
            s0 *= invDet;
            s1 *= invDet;
            sqrDist = s0 * (s0 + a01 * s1 + 2 * b0) + s1 * (a01 * s0 + s1 + 2 * b1) + c;
          } else {
            s1 = segExtent;
            s0 = Math.max(0, -(a01 * s1 + b0));
            sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
          }
        } else {
          s1 = -segExtent;
          s0 = Math.max(0, -(a01 * s1 + b0));
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        }
      } else {
        if (s1 <= -extDet) {
          s0 = Math.max(0, -(-a01 * segExtent + b0));
          s1 = s0 > 0 ? -segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        } else if (s1 <= extDet) {
          s0 = 0;
          s1 = Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = s1 * (s1 + 2 * b1) + c;
        } else {
          s0 = Math.max(0, -(a01 * segExtent + b0));
          s1 = s0 > 0 ? segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        }
      }
    } else {
      s1 = a01 > 0 ? -segExtent : segExtent;
      s0 = Math.max(0, -(a01 * s1 + b0));
      sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
    }
    if (optionalPointOnRay) {
      optionalPointOnRay.copy(this.direction).multiplyScalar(s0).add(this.origin);
    }
    if (optionalPointOnSegment) {
      optionalPointOnSegment.copy(_segDir).multiplyScalar(s1).add(_segCenter);
    }
    return sqrDist;
  }
  intersectSphere(sphere, target) {
    _vector$a.subVectors(sphere.center, this.origin);
    const tca = _vector$a.dot(this.direction);
    const d2 = _vector$a.dot(_vector$a) - tca * tca;
    const radius2 = sphere.radius * sphere.radius;
    if (d2 > radius2)
      return null;
    const thc = Math.sqrt(radius2 - d2);
    const t0 = tca - thc;
    const t1 = tca + thc;
    if (t0 < 0 && t1 < 0)
      return null;
    if (t0 < 0)
      return this.at(t1, target);
    return this.at(t0, target);
  }
  intersectsSphere(sphere) {
    return this.distanceSqToPoint(sphere.center) <= sphere.radius * sphere.radius;
  }
  distanceToPlane(plane) {
    const denominator = plane.normal.dot(this.direction);
    if (denominator === 0) {
      if (plane.distanceToPoint(this.origin) === 0) {
        return 0;
      }
      return null;
    }
    const t = -(this.origin.dot(plane.normal) + plane.constant) / denominator;
    return t >= 0 ? t : null;
  }
  intersectPlane(plane, target) {
    const t = this.distanceToPlane(plane);
    if (t === null) {
      return null;
    }
    return this.at(t, target);
  }
  intersectsPlane(plane) {
    const distToPoint = plane.distanceToPoint(this.origin);
    if (distToPoint === 0) {
      return true;
    }
    const denominator = plane.normal.dot(this.direction);
    if (denominator * distToPoint < 0) {
      return true;
    }
    return false;
  }
  intersectBox(box, target) {
    let tmin, tmax, tymin, tymax, tzmin, tzmax;
    const invdirx = 1 / this.direction.x, invdiry = 1 / this.direction.y, invdirz = 1 / this.direction.z;
    const origin = this.origin;
    if (invdirx >= 0) {
      tmin = (box.min.x - origin.x) * invdirx;
      tmax = (box.max.x - origin.x) * invdirx;
    } else {
      tmin = (box.max.x - origin.x) * invdirx;
      tmax = (box.min.x - origin.x) * invdirx;
    }
    if (invdiry >= 0) {
      tymin = (box.min.y - origin.y) * invdiry;
      tymax = (box.max.y - origin.y) * invdiry;
    } else {
      tymin = (box.max.y - origin.y) * invdiry;
      tymax = (box.min.y - origin.y) * invdiry;
    }
    if (tmin > tymax || tymin > tmax)
      return null;
    if (tymin > tmin || tmin !== tmin)
      tmin = tymin;
    if (tymax < tmax || tmax !== tmax)
      tmax = tymax;
    if (invdirz >= 0) {
      tzmin = (box.min.z - origin.z) * invdirz;
      tzmax = (box.max.z - origin.z) * invdirz;
    } else {
      tzmin = (box.max.z - origin.z) * invdirz;
      tzmax = (box.min.z - origin.z) * invdirz;
    }
    if (tmin > tzmax || tzmin > tmax)
      return null;
    if (tzmin > tmin || tmin !== tmin)
      tmin = tzmin;
    if (tzmax < tmax || tmax !== tmax)
      tmax = tzmax;
    if (tmax < 0)
      return null;
    return this.at(tmin >= 0 ? tmin : tmax, target);
  }
  intersectsBox(box) {
    return this.intersectBox(box, _vector$a) !== null;
  }
  intersectTriangle(a, b, c, backfaceCulling, target) {
    _edge1.subVectors(b, a);
    _edge2.subVectors(c, a);
    _normal$1.crossVectors(_edge1, _edge2);
    let DdN = this.direction.dot(_normal$1);
    let sign2;
    if (DdN > 0) {
      if (backfaceCulling)
        return null;
      sign2 = 1;
    } else if (DdN < 0) {
      sign2 = -1;
      DdN = -DdN;
    } else {
      return null;
    }
    _diff.subVectors(this.origin, a);
    const DdQxE2 = sign2 * this.direction.dot(_edge2.crossVectors(_diff, _edge2));
    if (DdQxE2 < 0) {
      return null;
    }
    const DdE1xQ = sign2 * this.direction.dot(_edge1.cross(_diff));
    if (DdE1xQ < 0) {
      return null;
    }
    if (DdQxE2 + DdE1xQ > DdN) {
      return null;
    }
    const QdN = -sign2 * _diff.dot(_normal$1);
    if (QdN < 0) {
      return null;
    }
    return this.at(QdN / DdN, target);
  }
  applyMatrix4(matrix4) {
    this.origin.applyMatrix4(matrix4);
    this.direction.transformDirection(matrix4);
    return this;
  }
  equals(ray) {
    return ray.origin.equals(this.origin) && ray.direction.equals(this.direction);
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
class Matrix4$1 {
  constructor() {
    this.elements = [
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1
    ];
    if (arguments.length > 0) {
      console.error("THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.");
    }
  }
  set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
    const te = this.elements;
    te[0] = n11;
    te[4] = n12;
    te[8] = n13;
    te[12] = n14;
    te[1] = n21;
    te[5] = n22;
    te[9] = n23;
    te[13] = n24;
    te[2] = n31;
    te[6] = n32;
    te[10] = n33;
    te[14] = n34;
    te[3] = n41;
    te[7] = n42;
    te[11] = n43;
    te[15] = n44;
    return this;
  }
  identity() {
    this.set(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
    return this;
  }
  clone() {
    return new Matrix4$1().fromArray(this.elements);
  }
  copy(m) {
    const te = this.elements;
    const me = m.elements;
    te[0] = me[0];
    te[1] = me[1];
    te[2] = me[2];
    te[3] = me[3];
    te[4] = me[4];
    te[5] = me[5];
    te[6] = me[6];
    te[7] = me[7];
    te[8] = me[8];
    te[9] = me[9];
    te[10] = me[10];
    te[11] = me[11];
    te[12] = me[12];
    te[13] = me[13];
    te[14] = me[14];
    te[15] = me[15];
    return this;
  }
  copyPosition(m) {
    const te = this.elements, me = m.elements;
    te[12] = me[12];
    te[13] = me[13];
    te[14] = me[14];
    return this;
  }
  setFromMatrix3(m) {
    const me = m.elements;
    this.set(me[0], me[3], me[6], 0, me[1], me[4], me[7], 0, me[2], me[5], me[8], 0, 0, 0, 0, 1);
    return this;
  }
  extractBasis(xAxis, yAxis, zAxis) {
    xAxis.setFromMatrixColumn(this, 0);
    yAxis.setFromMatrixColumn(this, 1);
    zAxis.setFromMatrixColumn(this, 2);
    return this;
  }
  makeBasis(xAxis, yAxis, zAxis) {
    this.set(xAxis.x, yAxis.x, zAxis.x, 0, xAxis.y, yAxis.y, zAxis.y, 0, xAxis.z, yAxis.z, zAxis.z, 0, 0, 0, 0, 1);
    return this;
  }
  extractRotation(m) {
    const te = this.elements;
    const me = m.elements;
    const scaleX = 1 / _v1$5.setFromMatrixColumn(m, 0).length();
    const scaleY = 1 / _v1$5.setFromMatrixColumn(m, 1).length();
    const scaleZ = 1 / _v1$5.setFromMatrixColumn(m, 2).length();
    te[0] = me[0] * scaleX;
    te[1] = me[1] * scaleX;
    te[2] = me[2] * scaleX;
    te[3] = 0;
    te[4] = me[4] * scaleY;
    te[5] = me[5] * scaleY;
    te[6] = me[6] * scaleY;
    te[7] = 0;
    te[8] = me[8] * scaleZ;
    te[9] = me[9] * scaleZ;
    te[10] = me[10] * scaleZ;
    te[11] = 0;
    te[12] = 0;
    te[13] = 0;
    te[14] = 0;
    te[15] = 1;
    return this;
  }
  makeRotationFromEuler(euler) {
    if (!(euler && euler.isEuler)) {
      console.error("THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.");
    }
    const te = this.elements;
    const x = euler.x, y = euler.y, z = euler.z;
    const a = Math.cos(x), b = Math.sin(x);
    const c = Math.cos(y), d = Math.sin(y);
    const e = Math.cos(z), f = Math.sin(z);
    if (euler.order === "XYZ") {
      const ae = a * e, af = a * f, be = b * e, bf = b * f;
      te[0] = c * e;
      te[4] = -c * f;
      te[8] = d;
      te[1] = af + be * d;
      te[5] = ae - bf * d;
      te[9] = -b * c;
      te[2] = bf - ae * d;
      te[6] = be + af * d;
      te[10] = a * c;
    } else if (euler.order === "YXZ") {
      const ce = c * e, cf = c * f, de = d * e, df = d * f;
      te[0] = ce + df * b;
      te[4] = de * b - cf;
      te[8] = a * d;
      te[1] = a * f;
      te[5] = a * e;
      te[9] = -b;
      te[2] = cf * b - de;
      te[6] = df + ce * b;
      te[10] = a * c;
    } else if (euler.order === "ZXY") {
      const ce = c * e, cf = c * f, de = d * e, df = d * f;
      te[0] = ce - df * b;
      te[4] = -a * f;
      te[8] = de + cf * b;
      te[1] = cf + de * b;
      te[5] = a * e;
      te[9] = df - ce * b;
      te[2] = -a * d;
      te[6] = b;
      te[10] = a * c;
    } else if (euler.order === "ZYX") {
      const ae = a * e, af = a * f, be = b * e, bf = b * f;
      te[0] = c * e;
      te[4] = be * d - af;
      te[8] = ae * d + bf;
      te[1] = c * f;
      te[5] = bf * d + ae;
      te[9] = af * d - be;
      te[2] = -d;
      te[6] = b * c;
      te[10] = a * c;
    } else if (euler.order === "YZX") {
      const ac = a * c, ad = a * d, bc = b * c, bd = b * d;
      te[0] = c * e;
      te[4] = bd - ac * f;
      te[8] = bc * f + ad;
      te[1] = f;
      te[5] = a * e;
      te[9] = -b * e;
      te[2] = -d * e;
      te[6] = ad * f + bc;
      te[10] = ac - bd * f;
    } else if (euler.order === "XZY") {
      const ac = a * c, ad = a * d, bc = b * c, bd = b * d;
      te[0] = c * e;
      te[4] = -f;
      te[8] = d * e;
      te[1] = ac * f + bd;
      te[5] = a * e;
      te[9] = ad * f - bc;
      te[2] = bc * f - ad;
      te[6] = b * e;
      te[10] = bd * f + ac;
    }
    te[3] = 0;
    te[7] = 0;
    te[11] = 0;
    te[12] = 0;
    te[13] = 0;
    te[14] = 0;
    te[15] = 1;
    return this;
  }
  makeRotationFromQuaternion(q) {
    return this.compose(_zero, q, _one);
  }
  lookAt(eye, target, up) {
    const te = this.elements;
    _z.subVectors(eye, target);
    if (_z.lengthSq() === 0) {
      _z.z = 1;
    }
    _z.normalize();
    _x.crossVectors(up, _z);
    if (_x.lengthSq() === 0) {
      if (Math.abs(up.z) === 1) {
        _z.x += 1e-4;
      } else {
        _z.z += 1e-4;
      }
      _z.normalize();
      _x.crossVectors(up, _z);
    }
    _x.normalize();
    _y.crossVectors(_z, _x);
    te[0] = _x.x;
    te[4] = _y.x;
    te[8] = _z.x;
    te[1] = _x.y;
    te[5] = _y.y;
    te[9] = _z.y;
    te[2] = _x.z;
    te[6] = _y.z;
    te[10] = _z.z;
    return this;
  }
  multiply(m, n) {
    if (n !== void 0) {
      console.warn("THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.");
      return this.multiplyMatrices(m, n);
    }
    return this.multiplyMatrices(this, m);
  }
  premultiply(m) {
    return this.multiplyMatrices(m, this);
  }
  multiplyMatrices(a, b) {
    const ae = a.elements;
    const be = b.elements;
    const te = this.elements;
    const a11 = ae[0], a12 = ae[4], a13 = ae[8], a14 = ae[12];
    const a21 = ae[1], a22 = ae[5], a23 = ae[9], a24 = ae[13];
    const a31 = ae[2], a32 = ae[6], a33 = ae[10], a34 = ae[14];
    const a41 = ae[3], a42 = ae[7], a43 = ae[11], a44 = ae[15];
    const b11 = be[0], b12 = be[4], b13 = be[8], b14 = be[12];
    const b21 = be[1], b22 = be[5], b23 = be[9], b24 = be[13];
    const b31 = be[2], b32 = be[6], b33 = be[10], b34 = be[14];
    const b41 = be[3], b42 = be[7], b43 = be[11], b44 = be[15];
    te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
    te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
    te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
    te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
    te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
    te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
    te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
    te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
    te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
    te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
    te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
    te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
    te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
    te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
    te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
    te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
    return this;
  }
  multiplyScalar(s) {
    const te = this.elements;
    te[0] *= s;
    te[4] *= s;
    te[8] *= s;
    te[12] *= s;
    te[1] *= s;
    te[5] *= s;
    te[9] *= s;
    te[13] *= s;
    te[2] *= s;
    te[6] *= s;
    te[10] *= s;
    te[14] *= s;
    te[3] *= s;
    te[7] *= s;
    te[11] *= s;
    te[15] *= s;
    return this;
  }
  determinant() {
    const te = this.elements;
    const n11 = te[0], n12 = te[4], n13 = te[8], n14 = te[12];
    const n21 = te[1], n22 = te[5], n23 = te[9], n24 = te[13];
    const n31 = te[2], n32 = te[6], n33 = te[10], n34 = te[14];
    const n41 = te[3], n42 = te[7], n43 = te[11], n44 = te[15];
    return n41 * (+n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34) + n42 * (+n11 * n23 * n34 - n11 * n24 * n33 + n14 * n21 * n33 - n13 * n21 * n34 + n13 * n24 * n31 - n14 * n23 * n31) + n43 * (+n11 * n24 * n32 - n11 * n22 * n34 - n14 * n21 * n32 + n12 * n21 * n34 + n14 * n22 * n31 - n12 * n24 * n31) + n44 * (-n13 * n22 * n31 - n11 * n23 * n32 + n11 * n22 * n33 + n13 * n21 * n32 - n12 * n21 * n33 + n12 * n23 * n31);
  }
  transpose() {
    const te = this.elements;
    let tmp2;
    tmp2 = te[1];
    te[1] = te[4];
    te[4] = tmp2;
    tmp2 = te[2];
    te[2] = te[8];
    te[8] = tmp2;
    tmp2 = te[6];
    te[6] = te[9];
    te[9] = tmp2;
    tmp2 = te[3];
    te[3] = te[12];
    te[12] = tmp2;
    tmp2 = te[7];
    te[7] = te[13];
    te[13] = tmp2;
    tmp2 = te[11];
    te[11] = te[14];
    te[14] = tmp2;
    return this;
  }
  setPosition(x, y, z) {
    const te = this.elements;
    if (x.isVector3) {
      te[12] = x.x;
      te[13] = x.y;
      te[14] = x.z;
    } else {
      te[12] = x;
      te[13] = y;
      te[14] = z;
    }
    return this;
  }
  invert() {
    const te = this.elements, n11 = te[0], n21 = te[1], n31 = te[2], n41 = te[3], n12 = te[4], n22 = te[5], n32 = te[6], n42 = te[7], n13 = te[8], n23 = te[9], n33 = te[10], n43 = te[11], n14 = te[12], n24 = te[13], n34 = te[14], n44 = te[15], t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44, t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44, t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44, t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
    const det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;
    if (det === 0)
      return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    const detInv = 1 / det;
    te[0] = t11 * detInv;
    te[1] = (n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44) * detInv;
    te[2] = (n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44) * detInv;
    te[3] = (n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43) * detInv;
    te[4] = t12 * detInv;
    te[5] = (n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44) * detInv;
    te[6] = (n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44) * detInv;
    te[7] = (n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43) * detInv;
    te[8] = t13 * detInv;
    te[9] = (n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44) * detInv;
    te[10] = (n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44) * detInv;
    te[11] = (n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43) * detInv;
    te[12] = t14 * detInv;
    te[13] = (n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34) * detInv;
    te[14] = (n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34) * detInv;
    te[15] = (n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33) * detInv;
    return this;
  }
  scale(v) {
    const te = this.elements;
    const x = v.x, y = v.y, z = v.z;
    te[0] *= x;
    te[4] *= y;
    te[8] *= z;
    te[1] *= x;
    te[5] *= y;
    te[9] *= z;
    te[2] *= x;
    te[6] *= y;
    te[10] *= z;
    te[3] *= x;
    te[7] *= y;
    te[11] *= z;
    return this;
  }
  getMaxScaleOnAxis() {
    const te = this.elements;
    const scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];
    const scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];
    const scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];
    return Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
  }
  makeTranslation(x, y, z) {
    this.set(1, 0, 0, x, 0, 1, 0, y, 0, 0, 1, z, 0, 0, 0, 1);
    return this;
  }
  makeRotationX(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(1, 0, 0, 0, 0, c, -s, 0, 0, s, c, 0, 0, 0, 0, 1);
    return this;
  }
  makeRotationY(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(c, 0, s, 0, 0, 1, 0, 0, -s, 0, c, 0, 0, 0, 0, 1);
    return this;
  }
  makeRotationZ(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(c, -s, 0, 0, s, c, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
    return this;
  }
  makeRotationAxis(axis, angle) {
    const c = Math.cos(angle);
    const s = Math.sin(angle);
    const t = 1 - c;
    const x = axis.x, y = axis.y, z = axis.z;
    const tx = t * x, ty = t * y;
    this.set(tx * x + c, tx * y - s * z, tx * z + s * y, 0, tx * y + s * z, ty * y + c, ty * z - s * x, 0, tx * z - s * y, ty * z + s * x, t * z * z + c, 0, 0, 0, 0, 1);
    return this;
  }
  makeScale(x, y, z) {
    this.set(x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, 0, 0, 0, 1);
    return this;
  }
  makeShear(xy, xz, yx, yz, zx, zy) {
    this.set(1, yx, zx, 0, xy, 1, zy, 0, xz, yz, 1, 0, 0, 0, 0, 1);
    return this;
  }
  compose(position, quaternion, scale) {
    const te = this.elements;
    const x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;
    const x2 = x + x, y2 = y + y, z2 = z + z;
    const xx = x * x2, xy = x * y2, xz = x * z2;
    const yy = y * y2, yz = y * z2, zz = z * z2;
    const wx = w * x2, wy = w * y2, wz = w * z2;
    const sx = scale.x, sy = scale.y, sz = scale.z;
    te[0] = (1 - (yy + zz)) * sx;
    te[1] = (xy + wz) * sx;
    te[2] = (xz - wy) * sx;
    te[3] = 0;
    te[4] = (xy - wz) * sy;
    te[5] = (1 - (xx + zz)) * sy;
    te[6] = (yz + wx) * sy;
    te[7] = 0;
    te[8] = (xz + wy) * sz;
    te[9] = (yz - wx) * sz;
    te[10] = (1 - (xx + yy)) * sz;
    te[11] = 0;
    te[12] = position.x;
    te[13] = position.y;
    te[14] = position.z;
    te[15] = 1;
    return this;
  }
  decompose(position, quaternion, scale) {
    const te = this.elements;
    let sx = _v1$5.set(te[0], te[1], te[2]).length();
    const sy = _v1$5.set(te[4], te[5], te[6]).length();
    const sz = _v1$5.set(te[8], te[9], te[10]).length();
    const det = this.determinant();
    if (det < 0)
      sx = -sx;
    position.x = te[12];
    position.y = te[13];
    position.z = te[14];
    _m1$2.copy(this);
    const invSX = 1 / sx;
    const invSY = 1 / sy;
    const invSZ = 1 / sz;
    _m1$2.elements[0] *= invSX;
    _m1$2.elements[1] *= invSX;
    _m1$2.elements[2] *= invSX;
    _m1$2.elements[4] *= invSY;
    _m1$2.elements[5] *= invSY;
    _m1$2.elements[6] *= invSY;
    _m1$2.elements[8] *= invSZ;
    _m1$2.elements[9] *= invSZ;
    _m1$2.elements[10] *= invSZ;
    quaternion.setFromRotationMatrix(_m1$2);
    scale.x = sx;
    scale.y = sy;
    scale.z = sz;
    return this;
  }
  makePerspective(left, right, top, bottom, near, far) {
    if (far === void 0) {
      console.warn("THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.");
    }
    const te = this.elements;
    const x = 2 * near / (right - left);
    const y = 2 * near / (top - bottom);
    const a = (right + left) / (right - left);
    const b = (top + bottom) / (top - bottom);
    const c = -(far + near) / (far - near);
    const d = -2 * far * near / (far - near);
    te[0] = x;
    te[4] = 0;
    te[8] = a;
    te[12] = 0;
    te[1] = 0;
    te[5] = y;
    te[9] = b;
    te[13] = 0;
    te[2] = 0;
    te[6] = 0;
    te[10] = c;
    te[14] = d;
    te[3] = 0;
    te[7] = 0;
    te[11] = -1;
    te[15] = 0;
    return this;
  }
  makeOrthographic(left, right, top, bottom, near, far) {
    const te = this.elements;
    const w = 1 / (right - left);
    const h = 1 / (top - bottom);
    const p = 1 / (far - near);
    const x = (right + left) * w;
    const y = (top + bottom) * h;
    const z = (far + near) * p;
    te[0] = 2 * w;
    te[4] = 0;
    te[8] = 0;
    te[12] = -x;
    te[1] = 0;
    te[5] = 2 * h;
    te[9] = 0;
    te[13] = -y;
    te[2] = 0;
    te[6] = 0;
    te[10] = -2 * p;
    te[14] = -z;
    te[3] = 0;
    te[7] = 0;
    te[11] = 0;
    te[15] = 1;
    return this;
  }
  equals(matrix) {
    const te = this.elements;
    const me = matrix.elements;
    for (let i = 0; i < 16; i++) {
      if (te[i] !== me[i])
        return false;
    }
    return true;
  }
  fromArray(array, offset = 0) {
    for (let i = 0; i < 16; i++) {
      this.elements[i] = array[i + offset];
    }
    return this;
  }
  toArray(array = [], offset = 0) {
    const te = this.elements;
    array[offset] = te[0];
    array[offset + 1] = te[1];
    array[offset + 2] = te[2];
    array[offset + 3] = te[3];
    array[offset + 4] = te[4];
    array[offset + 5] = te[5];
    array[offset + 6] = te[6];
    array[offset + 7] = te[7];
    array[offset + 8] = te[8];
    array[offset + 9] = te[9];
    array[offset + 10] = te[10];
    array[offset + 11] = te[11];
    array[offset + 12] = te[12];
    array[offset + 13] = te[13];
    array[offset + 14] = te[14];
    array[offset + 15] = te[15];
    return array;
  }
}
Matrix4$1.prototype.isMatrix4 = true;
const _v1$5 = /* @__PURE__ */ new Vector3$1();
const _m1$2 = /* @__PURE__ */ new Matrix4$1();
const _zero = /* @__PURE__ */ new Vector3$1(0, 0, 0);
const _one = /* @__PURE__ */ new Vector3$1(1, 1, 1);
const _x = /* @__PURE__ */ new Vector3$1();
const _y = /* @__PURE__ */ new Vector3$1();
const _z = /* @__PURE__ */ new Vector3$1();
const _matrix$1 = /* @__PURE__ */ new Matrix4$1();
const _quaternion$3 = /* @__PURE__ */ new Quaternion$1();
class Euler {
  constructor(x = 0, y = 0, z = 0, order = Euler.DefaultOrder) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._order = order;
  }
  get x() {
    return this._x;
  }
  set x(value) {
    this._x = value;
    this._onChangeCallback();
  }
  get y() {
    return this._y;
  }
  set y(value) {
    this._y = value;
    this._onChangeCallback();
  }
  get z() {
    return this._z;
  }
  set z(value) {
    this._z = value;
    this._onChangeCallback();
  }
  get order() {
    return this._order;
  }
  set order(value) {
    this._order = value;
    this._onChangeCallback();
  }
  set(x, y, z, order = this._order) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._order = order;
    this._onChangeCallback();
    return this;
  }
  clone() {
    return new this.constructor(this._x, this._y, this._z, this._order);
  }
  copy(euler) {
    this._x = euler._x;
    this._y = euler._y;
    this._z = euler._z;
    this._order = euler._order;
    this._onChangeCallback();
    return this;
  }
  setFromRotationMatrix(m, order = this._order, update = true) {
    const te = m.elements;
    const m11 = te[0], m12 = te[4], m13 = te[8];
    const m21 = te[1], m22 = te[5], m23 = te[9];
    const m31 = te[2], m32 = te[6], m33 = te[10];
    switch (order) {
      case "XYZ":
        this._y = Math.asin(clamp$2(m13, -1, 1));
        if (Math.abs(m13) < 0.9999999) {
          this._x = Math.atan2(-m23, m33);
          this._z = Math.atan2(-m12, m11);
        } else {
          this._x = Math.atan2(m32, m22);
          this._z = 0;
        }
        break;
      case "YXZ":
        this._x = Math.asin(-clamp$2(m23, -1, 1));
        if (Math.abs(m23) < 0.9999999) {
          this._y = Math.atan2(m13, m33);
          this._z = Math.atan2(m21, m22);
        } else {
          this._y = Math.atan2(-m31, m11);
          this._z = 0;
        }
        break;
      case "ZXY":
        this._x = Math.asin(clamp$2(m32, -1, 1));
        if (Math.abs(m32) < 0.9999999) {
          this._y = Math.atan2(-m31, m33);
          this._z = Math.atan2(-m12, m22);
        } else {
          this._y = 0;
          this._z = Math.atan2(m21, m11);
        }
        break;
      case "ZYX":
        this._y = Math.asin(-clamp$2(m31, -1, 1));
        if (Math.abs(m31) < 0.9999999) {
          this._x = Math.atan2(m32, m33);
          this._z = Math.atan2(m21, m11);
        } else {
          this._x = 0;
          this._z = Math.atan2(-m12, m22);
        }
        break;
      case "YZX":
        this._z = Math.asin(clamp$2(m21, -1, 1));
        if (Math.abs(m21) < 0.9999999) {
          this._x = Math.atan2(-m23, m22);
          this._y = Math.atan2(-m31, m11);
        } else {
          this._x = 0;
          this._y = Math.atan2(m13, m33);
        }
        break;
      case "XZY":
        this._z = Math.asin(-clamp$2(m12, -1, 1));
        if (Math.abs(m12) < 0.9999999) {
          this._x = Math.atan2(m32, m22);
          this._y = Math.atan2(m13, m11);
        } else {
          this._x = Math.atan2(-m23, m33);
          this._y = 0;
        }
        break;
      default:
        console.warn("THREE.Euler: .setFromRotationMatrix() encountered an unknown order: " + order);
    }
    this._order = order;
    if (update === true)
      this._onChangeCallback();
    return this;
  }
  setFromQuaternion(q, order, update) {
    _matrix$1.makeRotationFromQuaternion(q);
    return this.setFromRotationMatrix(_matrix$1, order, update);
  }
  setFromVector3(v, order = this._order) {
    return this.set(v.x, v.y, v.z, order);
  }
  reorder(newOrder) {
    _quaternion$3.setFromEuler(this);
    return this.setFromQuaternion(_quaternion$3, newOrder);
  }
  equals(euler) {
    return euler._x === this._x && euler._y === this._y && euler._z === this._z && euler._order === this._order;
  }
  fromArray(array) {
    this._x = array[0];
    this._y = array[1];
    this._z = array[2];
    if (array[3] !== void 0)
      this._order = array[3];
    this._onChangeCallback();
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this._x;
    array[offset + 1] = this._y;
    array[offset + 2] = this._z;
    array[offset + 3] = this._order;
    return array;
  }
  toVector3(optionalResult) {
    if (optionalResult) {
      return optionalResult.set(this._x, this._y, this._z);
    } else {
      return new Vector3$1(this._x, this._y, this._z);
    }
  }
  _onChange(callback) {
    this._onChangeCallback = callback;
    return this;
  }
  _onChangeCallback() {
  }
}
Euler.prototype.isEuler = true;
Euler.DefaultOrder = "XYZ";
Euler.RotationOrders = ["XYZ", "YZX", "ZXY", "XZY", "YXZ", "ZYX"];
class Layers {
  constructor() {
    this.mask = 1 | 0;
  }
  set(channel) {
    this.mask = (1 << channel | 0) >>> 0;
  }
  enable(channel) {
    this.mask |= 1 << channel | 0;
  }
  enableAll() {
    this.mask = 4294967295 | 0;
  }
  toggle(channel) {
    this.mask ^= 1 << channel | 0;
  }
  disable(channel) {
    this.mask &= ~(1 << channel | 0);
  }
  disableAll() {
    this.mask = 0;
  }
  test(layers) {
    return (this.mask & layers.mask) !== 0;
  }
  isEnabled(channel) {
    return (this.mask & (1 << channel | 0)) !== 0;
  }
}
let _object3DId = 0;
const _v1$4 = /* @__PURE__ */ new Vector3$1();
const _q1 = /* @__PURE__ */ new Quaternion$1();
const _m1$1 = /* @__PURE__ */ new Matrix4$1();
const _target = /* @__PURE__ */ new Vector3$1();
const _position$3 = /* @__PURE__ */ new Vector3$1();
const _scale$2 = /* @__PURE__ */ new Vector3$1();
const _quaternion$2 = /* @__PURE__ */ new Quaternion$1();
const _xAxis = /* @__PURE__ */ new Vector3$1(1, 0, 0);
const _yAxis = /* @__PURE__ */ new Vector3$1(0, 1, 0);
const _zAxis = /* @__PURE__ */ new Vector3$1(0, 0, 1);
const _addedEvent = {type: "added"};
const _removedEvent = {type: "removed"};
class Object3D extends EventDispatcher {
  constructor() {
    super();
    Object.defineProperty(this, "id", {value: _object3DId++});
    this.uuid = generateUUID();
    this.name = "";
    this.type = "Object3D";
    this.parent = null;
    this.children = [];
    this.up = Object3D.DefaultUp.clone();
    const position = new Vector3$1();
    const rotation = new Euler();
    const quaternion = new Quaternion$1();
    const scale = new Vector3$1(1, 1, 1);
    function onRotationChange() {
      quaternion.setFromEuler(rotation, false);
    }
    function onQuaternionChange() {
      rotation.setFromQuaternion(quaternion, void 0, false);
    }
    rotation._onChange(onRotationChange);
    quaternion._onChange(onQuaternionChange);
    Object.defineProperties(this, {
      position: {
        configurable: true,
        enumerable: true,
        value: position
      },
      rotation: {
        configurable: true,
        enumerable: true,
        value: rotation
      },
      quaternion: {
        configurable: true,
        enumerable: true,
        value: quaternion
      },
      scale: {
        configurable: true,
        enumerable: true,
        value: scale
      },
      modelViewMatrix: {
        value: new Matrix4$1()
      },
      normalMatrix: {
        value: new Matrix3$1()
      }
    });
    this.matrix = new Matrix4$1();
    this.matrixWorld = new Matrix4$1();
    this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
    this.matrixWorldNeedsUpdate = false;
    this.layers = new Layers();
    this.visible = true;
    this.castShadow = false;
    this.receiveShadow = false;
    this.frustumCulled = true;
    this.renderOrder = 0;
    this.animations = [];
    this.userData = {};
  }
  onBeforeRender() {
  }
  onAfterRender() {
  }
  applyMatrix4(matrix) {
    if (this.matrixAutoUpdate)
      this.updateMatrix();
    this.matrix.premultiply(matrix);
    this.matrix.decompose(this.position, this.quaternion, this.scale);
  }
  applyQuaternion(q) {
    this.quaternion.premultiply(q);
    return this;
  }
  setRotationFromAxisAngle(axis, angle) {
    this.quaternion.setFromAxisAngle(axis, angle);
  }
  setRotationFromEuler(euler) {
    this.quaternion.setFromEuler(euler, true);
  }
  setRotationFromMatrix(m) {
    this.quaternion.setFromRotationMatrix(m);
  }
  setRotationFromQuaternion(q) {
    this.quaternion.copy(q);
  }
  rotateOnAxis(axis, angle) {
    _q1.setFromAxisAngle(axis, angle);
    this.quaternion.multiply(_q1);
    return this;
  }
  rotateOnWorldAxis(axis, angle) {
    _q1.setFromAxisAngle(axis, angle);
    this.quaternion.premultiply(_q1);
    return this;
  }
  rotateX(angle) {
    return this.rotateOnAxis(_xAxis, angle);
  }
  rotateY(angle) {
    return this.rotateOnAxis(_yAxis, angle);
  }
  rotateZ(angle) {
    return this.rotateOnAxis(_zAxis, angle);
  }
  translateOnAxis(axis, distance) {
    _v1$4.copy(axis).applyQuaternion(this.quaternion);
    this.position.add(_v1$4.multiplyScalar(distance));
    return this;
  }
  translateX(distance) {
    return this.translateOnAxis(_xAxis, distance);
  }
  translateY(distance) {
    return this.translateOnAxis(_yAxis, distance);
  }
  translateZ(distance) {
    return this.translateOnAxis(_zAxis, distance);
  }
  localToWorld(vector) {
    return vector.applyMatrix4(this.matrixWorld);
  }
  worldToLocal(vector) {
    return vector.applyMatrix4(_m1$1.copy(this.matrixWorld).invert());
  }
  lookAt(x, y, z) {
    if (x.isVector3) {
      _target.copy(x);
    } else {
      _target.set(x, y, z);
    }
    const parent = this.parent;
    this.updateWorldMatrix(true, false);
    _position$3.setFromMatrixPosition(this.matrixWorld);
    if (this.isCamera || this.isLight) {
      _m1$1.lookAt(_position$3, _target, this.up);
    } else {
      _m1$1.lookAt(_target, _position$3, this.up);
    }
    this.quaternion.setFromRotationMatrix(_m1$1);
    if (parent) {
      _m1$1.extractRotation(parent.matrixWorld);
      _q1.setFromRotationMatrix(_m1$1);
      this.quaternion.premultiply(_q1.invert());
    }
  }
  add(object) {
    if (arguments.length > 1) {
      for (let i = 0; i < arguments.length; i++) {
        this.add(arguments[i]);
      }
      return this;
    }
    if (object === this) {
      console.error("THREE.Object3D.add: object can't be added as a child of itself.", object);
      return this;
    }
    if (object && object.isObject3D) {
      if (object.parent !== null) {
        object.parent.remove(object);
      }
      object.parent = this;
      this.children.push(object);
      object.dispatchEvent(_addedEvent);
    } else {
      console.error("THREE.Object3D.add: object not an instance of THREE.Object3D.", object);
    }
    return this;
  }
  remove(object) {
    if (arguments.length > 1) {
      for (let i = 0; i < arguments.length; i++) {
        this.remove(arguments[i]);
      }
      return this;
    }
    const index = this.children.indexOf(object);
    if (index !== -1) {
      object.parent = null;
      this.children.splice(index, 1);
      object.dispatchEvent(_removedEvent);
    }
    return this;
  }
  removeFromParent() {
    const parent = this.parent;
    if (parent !== null) {
      parent.remove(this);
    }
    return this;
  }
  clear() {
    for (let i = 0; i < this.children.length; i++) {
      const object = this.children[i];
      object.parent = null;
      object.dispatchEvent(_removedEvent);
    }
    this.children.length = 0;
    return this;
  }
  attach(object) {
    this.updateWorldMatrix(true, false);
    _m1$1.copy(this.matrixWorld).invert();
    if (object.parent !== null) {
      object.parent.updateWorldMatrix(true, false);
      _m1$1.multiply(object.parent.matrixWorld);
    }
    object.applyMatrix4(_m1$1);
    this.add(object);
    object.updateWorldMatrix(false, true);
    return this;
  }
  getObjectById(id) {
    return this.getObjectByProperty("id", id);
  }
  getObjectByName(name) {
    return this.getObjectByProperty("name", name);
  }
  getObjectByProperty(name, value) {
    if (this[name] === value)
      return this;
    for (let i = 0, l = this.children.length; i < l; i++) {
      const child = this.children[i];
      const object = child.getObjectByProperty(name, value);
      if (object !== void 0) {
        return object;
      }
    }
    return void 0;
  }
  getWorldPosition(target) {
    this.updateWorldMatrix(true, false);
    return target.setFromMatrixPosition(this.matrixWorld);
  }
  getWorldQuaternion(target) {
    this.updateWorldMatrix(true, false);
    this.matrixWorld.decompose(_position$3, target, _scale$2);
    return target;
  }
  getWorldScale(target) {
    this.updateWorldMatrix(true, false);
    this.matrixWorld.decompose(_position$3, _quaternion$2, target);
    return target;
  }
  getWorldDirection(target) {
    this.updateWorldMatrix(true, false);
    const e = this.matrixWorld.elements;
    return target.set(e[8], e[9], e[10]).normalize();
  }
  raycast() {
  }
  traverse(callback) {
    callback(this);
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].traverse(callback);
    }
  }
  traverseVisible(callback) {
    if (this.visible === false)
      return;
    callback(this);
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].traverseVisible(callback);
    }
  }
  traverseAncestors(callback) {
    const parent = this.parent;
    if (parent !== null) {
      callback(parent);
      parent.traverseAncestors(callback);
    }
  }
  updateMatrix() {
    this.matrix.compose(this.position, this.quaternion, this.scale);
    this.matrixWorldNeedsUpdate = true;
  }
  updateMatrixWorld(force) {
    if (this.matrixAutoUpdate)
      this.updateMatrix();
    if (this.matrixWorldNeedsUpdate || force) {
      if (this.parent === null) {
        this.matrixWorld.copy(this.matrix);
      } else {
        this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
      }
      this.matrixWorldNeedsUpdate = false;
      force = true;
    }
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].updateMatrixWorld(force);
    }
  }
  updateWorldMatrix(updateParents, updateChildren) {
    const parent = this.parent;
    if (updateParents === true && parent !== null) {
      parent.updateWorldMatrix(true, false);
    }
    if (this.matrixAutoUpdate)
      this.updateMatrix();
    if (this.parent === null) {
      this.matrixWorld.copy(this.matrix);
    } else {
      this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
    }
    if (updateChildren === true) {
      const children = this.children;
      for (let i = 0, l = children.length; i < l; i++) {
        children[i].updateWorldMatrix(false, true);
      }
    }
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    const output = {};
    if (isRootObject) {
      meta = {
        geometries: {},
        materials: {},
        textures: {},
        images: {},
        shapes: {},
        skeletons: {},
        animations: {}
      };
      output.metadata = {
        version: 4.5,
        type: "Object",
        generator: "Object3D.toJSON"
      };
    }
    const object = {};
    object.uuid = this.uuid;
    object.type = this.type;
    if (this.name !== "")
      object.name = this.name;
    if (this.castShadow === true)
      object.castShadow = true;
    if (this.receiveShadow === true)
      object.receiveShadow = true;
    if (this.visible === false)
      object.visible = false;
    if (this.frustumCulled === false)
      object.frustumCulled = false;
    if (this.renderOrder !== 0)
      object.renderOrder = this.renderOrder;
    if (JSON.stringify(this.userData) !== "{}")
      object.userData = this.userData;
    object.layers = this.layers.mask;
    object.matrix = this.matrix.toArray();
    if (this.matrixAutoUpdate === false)
      object.matrixAutoUpdate = false;
    if (this.isInstancedMesh) {
      object.type = "InstancedMesh";
      object.count = this.count;
      object.instanceMatrix = this.instanceMatrix.toJSON();
      if (this.instanceColor !== null)
        object.instanceColor = this.instanceColor.toJSON();
    }
    function serialize(library, element) {
      if (library[element.uuid] === void 0) {
        library[element.uuid] = element.toJSON(meta);
      }
      return element.uuid;
    }
    if (this.isScene) {
      if (this.background) {
        if (this.background.isColor) {
          object.background = this.background.toJSON();
        } else if (this.background.isTexture) {
          object.background = this.background.toJSON(meta).uuid;
        }
      }
      if (this.environment && this.environment.isTexture) {
        object.environment = this.environment.toJSON(meta).uuid;
      }
    } else if (this.isMesh || this.isLine || this.isPoints) {
      object.geometry = serialize(meta.geometries, this.geometry);
      const parameters = this.geometry.parameters;
      if (parameters !== void 0 && parameters.shapes !== void 0) {
        const shapes = parameters.shapes;
        if (Array.isArray(shapes)) {
          for (let i = 0, l = shapes.length; i < l; i++) {
            const shape = shapes[i];
            serialize(meta.shapes, shape);
          }
        } else {
          serialize(meta.shapes, shapes);
        }
      }
    }
    if (this.isSkinnedMesh) {
      object.bindMode = this.bindMode;
      object.bindMatrix = this.bindMatrix.toArray();
      if (this.skeleton !== void 0) {
        serialize(meta.skeletons, this.skeleton);
        object.skeleton = this.skeleton.uuid;
      }
    }
    if (this.material !== void 0) {
      if (Array.isArray(this.material)) {
        const uuids = [];
        for (let i = 0, l = this.material.length; i < l; i++) {
          uuids.push(serialize(meta.materials, this.material[i]));
        }
        object.material = uuids;
      } else {
        object.material = serialize(meta.materials, this.material);
      }
    }
    if (this.children.length > 0) {
      object.children = [];
      for (let i = 0; i < this.children.length; i++) {
        object.children.push(this.children[i].toJSON(meta).object);
      }
    }
    if (this.animations.length > 0) {
      object.animations = [];
      for (let i = 0; i < this.animations.length; i++) {
        const animation = this.animations[i];
        object.animations.push(serialize(meta.animations, animation));
      }
    }
    if (isRootObject) {
      const geometries = extractFromCache(meta.geometries);
      const materials = extractFromCache(meta.materials);
      const textures = extractFromCache(meta.textures);
      const images = extractFromCache(meta.images);
      const shapes = extractFromCache(meta.shapes);
      const skeletons = extractFromCache(meta.skeletons);
      const animations = extractFromCache(meta.animations);
      if (geometries.length > 0)
        output.geometries = geometries;
      if (materials.length > 0)
        output.materials = materials;
      if (textures.length > 0)
        output.textures = textures;
      if (images.length > 0)
        output.images = images;
      if (shapes.length > 0)
        output.shapes = shapes;
      if (skeletons.length > 0)
        output.skeletons = skeletons;
      if (animations.length > 0)
        output.animations = animations;
    }
    output.object = object;
    return output;
    function extractFromCache(cache) {
      const values = [];
      for (const key in cache) {
        const data = cache[key];
        delete data.metadata;
        values.push(data);
      }
      return values;
    }
  }
  clone(recursive) {
    return new this.constructor().copy(this, recursive);
  }
  copy(source, recursive = true) {
    this.name = source.name;
    this.up.copy(source.up);
    this.position.copy(source.position);
    this.rotation.order = source.rotation.order;
    this.quaternion.copy(source.quaternion);
    this.scale.copy(source.scale);
    this.matrix.copy(source.matrix);
    this.matrixWorld.copy(source.matrixWorld);
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;
    this.layers.mask = source.layers.mask;
    this.visible = source.visible;
    this.castShadow = source.castShadow;
    this.receiveShadow = source.receiveShadow;
    this.frustumCulled = source.frustumCulled;
    this.renderOrder = source.renderOrder;
    this.userData = JSON.parse(JSON.stringify(source.userData));
    if (recursive === true) {
      for (let i = 0; i < source.children.length; i++) {
        const child = source.children[i];
        this.add(child.clone());
      }
    }
    return this;
  }
}
Object3D.DefaultUp = new Vector3$1(0, 1, 0);
Object3D.DefaultMatrixAutoUpdate = true;
Object3D.prototype.isObject3D = true;
const _v0$1 = /* @__PURE__ */ new Vector3$1();
const _v1$3 = /* @__PURE__ */ new Vector3$1();
const _v2$2 = /* @__PURE__ */ new Vector3$1();
const _v3$1 = /* @__PURE__ */ new Vector3$1();
const _vab = /* @__PURE__ */ new Vector3$1();
const _vac = /* @__PURE__ */ new Vector3$1();
const _vbc = /* @__PURE__ */ new Vector3$1();
const _vap = /* @__PURE__ */ new Vector3$1();
const _vbp = /* @__PURE__ */ new Vector3$1();
const _vcp = /* @__PURE__ */ new Vector3$1();
class Triangle {
  constructor(a = new Vector3$1(), b = new Vector3$1(), c = new Vector3$1()) {
    this.a = a;
    this.b = b;
    this.c = c;
  }
  static getNormal(a, b, c, target) {
    target.subVectors(c, b);
    _v0$1.subVectors(a, b);
    target.cross(_v0$1);
    const targetLengthSq = target.lengthSq();
    if (targetLengthSq > 0) {
      return target.multiplyScalar(1 / Math.sqrt(targetLengthSq));
    }
    return target.set(0, 0, 0);
  }
  static getBarycoord(point, a, b, c, target) {
    _v0$1.subVectors(c, a);
    _v1$3.subVectors(b, a);
    _v2$2.subVectors(point, a);
    const dot00 = _v0$1.dot(_v0$1);
    const dot01 = _v0$1.dot(_v1$3);
    const dot02 = _v0$1.dot(_v2$2);
    const dot11 = _v1$3.dot(_v1$3);
    const dot12 = _v1$3.dot(_v2$2);
    const denom = dot00 * dot11 - dot01 * dot01;
    if (denom === 0) {
      return target.set(-2, -1, -1);
    }
    const invDenom = 1 / denom;
    const u = (dot11 * dot02 - dot01 * dot12) * invDenom;
    const v = (dot00 * dot12 - dot01 * dot02) * invDenom;
    return target.set(1 - u - v, v, u);
  }
  static containsPoint(point, a, b, c) {
    this.getBarycoord(point, a, b, c, _v3$1);
    return _v3$1.x >= 0 && _v3$1.y >= 0 && _v3$1.x + _v3$1.y <= 1;
  }
  static getUV(point, p1, p2, p3, uv1, uv2, uv3, target) {
    this.getBarycoord(point, p1, p2, p3, _v3$1);
    target.set(0, 0);
    target.addScaledVector(uv1, _v3$1.x);
    target.addScaledVector(uv2, _v3$1.y);
    target.addScaledVector(uv3, _v3$1.z);
    return target;
  }
  static isFrontFacing(a, b, c, direction) {
    _v0$1.subVectors(c, b);
    _v1$3.subVectors(a, b);
    return _v0$1.cross(_v1$3).dot(direction) < 0 ? true : false;
  }
  set(a, b, c) {
    this.a.copy(a);
    this.b.copy(b);
    this.c.copy(c);
    return this;
  }
  setFromPointsAndIndices(points, i0, i1, i2) {
    this.a.copy(points[i0]);
    this.b.copy(points[i1]);
    this.c.copy(points[i2]);
    return this;
  }
  setFromAttributeAndIndices(attribute, i0, i1, i2) {
    this.a.fromBufferAttribute(attribute, i0);
    this.b.fromBufferAttribute(attribute, i1);
    this.c.fromBufferAttribute(attribute, i2);
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(triangle) {
    this.a.copy(triangle.a);
    this.b.copy(triangle.b);
    this.c.copy(triangle.c);
    return this;
  }
  getArea() {
    _v0$1.subVectors(this.c, this.b);
    _v1$3.subVectors(this.a, this.b);
    return _v0$1.cross(_v1$3).length() * 0.5;
  }
  getMidpoint(target) {
    return target.addVectors(this.a, this.b).add(this.c).multiplyScalar(1 / 3);
  }
  getNormal(target) {
    return Triangle.getNormal(this.a, this.b, this.c, target);
  }
  getPlane(target) {
    return target.setFromCoplanarPoints(this.a, this.b, this.c);
  }
  getBarycoord(point, target) {
    return Triangle.getBarycoord(point, this.a, this.b, this.c, target);
  }
  getUV(point, uv1, uv2, uv3, target) {
    return Triangle.getUV(point, this.a, this.b, this.c, uv1, uv2, uv3, target);
  }
  containsPoint(point) {
    return Triangle.containsPoint(point, this.a, this.b, this.c);
  }
  isFrontFacing(direction) {
    return Triangle.isFrontFacing(this.a, this.b, this.c, direction);
  }
  intersectsBox(box) {
    return box.intersectsTriangle(this);
  }
  closestPointToPoint(p, target) {
    const a = this.a, b = this.b, c = this.c;
    let v, w;
    _vab.subVectors(b, a);
    _vac.subVectors(c, a);
    _vap.subVectors(p, a);
    const d1 = _vab.dot(_vap);
    const d2 = _vac.dot(_vap);
    if (d1 <= 0 && d2 <= 0) {
      return target.copy(a);
    }
    _vbp.subVectors(p, b);
    const d3 = _vab.dot(_vbp);
    const d4 = _vac.dot(_vbp);
    if (d3 >= 0 && d4 <= d3) {
      return target.copy(b);
    }
    const vc = d1 * d4 - d3 * d2;
    if (vc <= 0 && d1 >= 0 && d3 <= 0) {
      v = d1 / (d1 - d3);
      return target.copy(a).addScaledVector(_vab, v);
    }
    _vcp.subVectors(p, c);
    const d5 = _vab.dot(_vcp);
    const d6 = _vac.dot(_vcp);
    if (d6 >= 0 && d5 <= d6) {
      return target.copy(c);
    }
    const vb = d5 * d2 - d1 * d6;
    if (vb <= 0 && d2 >= 0 && d6 <= 0) {
      w = d2 / (d2 - d6);
      return target.copy(a).addScaledVector(_vac, w);
    }
    const va = d3 * d6 - d5 * d4;
    if (va <= 0 && d4 - d3 >= 0 && d5 - d6 >= 0) {
      _vbc.subVectors(c, b);
      w = (d4 - d3) / (d4 - d3 + (d5 - d6));
      return target.copy(b).addScaledVector(_vbc, w);
    }
    const denom = 1 / (va + vb + vc);
    v = vb * denom;
    w = vc * denom;
    return target.copy(a).addScaledVector(_vab, v).addScaledVector(_vac, w);
  }
  equals(triangle) {
    return triangle.a.equals(this.a) && triangle.b.equals(this.b) && triangle.c.equals(this.c);
  }
}
let materialId = 0;
class Material extends EventDispatcher {
  constructor() {
    super();
    Object.defineProperty(this, "id", {value: materialId++});
    this.uuid = generateUUID();
    this.name = "";
    this.type = "Material";
    this.fog = true;
    this.blending = NormalBlending;
    this.side = FrontSide;
    this.vertexColors = false;
    this.opacity = 1;
    this.transparent = false;
    this.blendSrc = SrcAlphaFactor;
    this.blendDst = OneMinusSrcAlphaFactor;
    this.blendEquation = AddEquation;
    this.blendSrcAlpha = null;
    this.blendDstAlpha = null;
    this.blendEquationAlpha = null;
    this.depthFunc = LessEqualDepth;
    this.depthTest = true;
    this.depthWrite = true;
    this.stencilWriteMask = 255;
    this.stencilFunc = AlwaysStencilFunc;
    this.stencilRef = 0;
    this.stencilFuncMask = 255;
    this.stencilFail = KeepStencilOp;
    this.stencilZFail = KeepStencilOp;
    this.stencilZPass = KeepStencilOp;
    this.stencilWrite = false;
    this.clippingPlanes = null;
    this.clipIntersection = false;
    this.clipShadows = false;
    this.shadowSide = null;
    this.colorWrite = true;
    this.alphaWrite = true;
    this.precision = null;
    this.polygonOffset = false;
    this.polygonOffsetFactor = 0;
    this.polygonOffsetUnits = 0;
    this.dithering = false;
    this.alphaToCoverage = false;
    this.premultipliedAlpha = false;
    this.visible = true;
    this.toneMapped = true;
    this.userData = {};
    this.version = 0;
    this._alphaTest = 0;
  }
  get alphaTest() {
    return this._alphaTest;
  }
  set alphaTest(value) {
    if (this._alphaTest > 0 !== value > 0) {
      this.version++;
    }
    this._alphaTest = value;
  }
  onBuild() {
  }
  onBeforeRender() {
  }
  onBeforeCompile() {
  }
  customProgramCacheKey() {
    return this.onBeforeCompile.toString();
  }
  setValues(values) {
    if (values === void 0)
      return;
    for (const key in values) {
      const newValue = values[key];
      if (newValue === void 0) {
        console.warn("THREE.Material: '" + key + "' parameter is undefined.");
        continue;
      }
      if (key === "shading") {
        console.warn("THREE." + this.type + ": .shading has been removed. Use the boolean .flatShading instead.");
        this.flatShading = newValue === FlatShading ? true : false;
        continue;
      }
      const currentValue = this[key];
      if (currentValue === void 0) {
        console.warn("THREE." + this.type + ": '" + key + "' is not a property of this material.");
        continue;
      }
      if (currentValue && currentValue.isColor) {
        currentValue.set(newValue);
      } else if (currentValue && currentValue.isVector3 && (newValue && newValue.isVector3)) {
        currentValue.copy(newValue);
      } else {
        this[key] = newValue;
      }
    }
  }
  toJSON(meta) {
    const isRoot = meta === void 0 || typeof meta === "string";
    if (isRoot) {
      meta = {
        textures: {},
        images: {}
      };
    }
    const data = {
      metadata: {
        version: 4.5,
        type: "Material",
        generator: "Material.toJSON"
      }
    };
    data.uuid = this.uuid;
    data.type = this.type;
    if (this.name !== "")
      data.name = this.name;
    if (this.color && this.color.isColor)
      data.color = this.color.getHex();
    if (this.roughness !== void 0)
      data.roughness = this.roughness;
    if (this.metalness !== void 0)
      data.metalness = this.metalness;
    if (this.sheen !== void 0)
      data.sheen = this.sheen;
    if (this.sheenColor && this.sheenColor.isColor)
      data.sheenColor = this.sheenColor.getHex();
    if (this.sheenRoughness !== void 0)
      data.sheenRoughness = this.sheenRoughness;
    if (this.emissive && this.emissive.isColor)
      data.emissive = this.emissive.getHex();
    if (this.emissiveIntensity && this.emissiveIntensity !== 1)
      data.emissiveIntensity = this.emissiveIntensity;
    if (this.specular && this.specular.isColor)
      data.specular = this.specular.getHex();
    if (this.specularIntensity !== void 0)
      data.specularIntensity = this.specularIntensity;
    if (this.specularColor && this.specularColor.isColor)
      data.specularColor = this.specularColor.getHex();
    if (this.shininess !== void 0)
      data.shininess = this.shininess;
    if (this.clearcoat !== void 0)
      data.clearcoat = this.clearcoat;
    if (this.clearcoatRoughness !== void 0)
      data.clearcoatRoughness = this.clearcoatRoughness;
    if (this.clearcoatMap && this.clearcoatMap.isTexture) {
      data.clearcoatMap = this.clearcoatMap.toJSON(meta).uuid;
    }
    if (this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture) {
      data.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON(meta).uuid;
    }
    if (this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture) {
      data.clearcoatNormalMap = this.clearcoatNormalMap.toJSON(meta).uuid;
      data.clearcoatNormalScale = this.clearcoatNormalScale.toArray();
    }
    if (this.map && this.map.isTexture)
      data.map = this.map.toJSON(meta).uuid;
    if (this.matcap && this.matcap.isTexture)
      data.matcap = this.matcap.toJSON(meta).uuid;
    if (this.alphaMap && this.alphaMap.isTexture)
      data.alphaMap = this.alphaMap.toJSON(meta).uuid;
    if (this.lightMap && this.lightMap.isTexture) {
      data.lightMap = this.lightMap.toJSON(meta).uuid;
      data.lightMapIntensity = this.lightMapIntensity;
    }
    if (this.aoMap && this.aoMap.isTexture) {
      data.aoMap = this.aoMap.toJSON(meta).uuid;
      data.aoMapIntensity = this.aoMapIntensity;
    }
    if (this.bumpMap && this.bumpMap.isTexture) {
      data.bumpMap = this.bumpMap.toJSON(meta).uuid;
      data.bumpScale = this.bumpScale;
    }
    if (this.normalMap && this.normalMap.isTexture) {
      data.normalMap = this.normalMap.toJSON(meta).uuid;
      data.normalMapType = this.normalMapType;
      data.normalScale = this.normalScale.toArray();
    }
    if (this.displacementMap && this.displacementMap.isTexture) {
      data.displacementMap = this.displacementMap.toJSON(meta).uuid;
      data.displacementScale = this.displacementScale;
      data.displacementBias = this.displacementBias;
    }
    if (this.roughnessMap && this.roughnessMap.isTexture)
      data.roughnessMap = this.roughnessMap.toJSON(meta).uuid;
    if (this.metalnessMap && this.metalnessMap.isTexture)
      data.metalnessMap = this.metalnessMap.toJSON(meta).uuid;
    if (this.emissiveMap && this.emissiveMap.isTexture)
      data.emissiveMap = this.emissiveMap.toJSON(meta).uuid;
    if (this.specularMap && this.specularMap.isTexture)
      data.specularMap = this.specularMap.toJSON(meta).uuid;
    if (this.specularIntensityMap && this.specularIntensityMap.isTexture)
      data.specularIntensityMap = this.specularIntensityMap.toJSON(meta).uuid;
    if (this.specularColorMap && this.specularColorMap.isTexture)
      data.specularColorMap = this.specularColorMap.toJSON(meta).uuid;
    if (this.envMap && this.envMap.isTexture) {
      data.envMap = this.envMap.toJSON(meta).uuid;
      if (this.combine !== void 0)
        data.combine = this.combine;
    }
    if (this.envMapIntensity !== void 0)
      data.envMapIntensity = this.envMapIntensity;
    if (this.reflectivity !== void 0)
      data.reflectivity = this.reflectivity;
    if (this.refractionRatio !== void 0)
      data.refractionRatio = this.refractionRatio;
    if (this.gradientMap && this.gradientMap.isTexture) {
      data.gradientMap = this.gradientMap.toJSON(meta).uuid;
    }
    if (this.transmission !== void 0)
      data.transmission = this.transmission;
    if (this.transmissionMap && this.transmissionMap.isTexture)
      data.transmissionMap = this.transmissionMap.toJSON(meta).uuid;
    if (this.thickness !== void 0)
      data.thickness = this.thickness;
    if (this.thicknessMap && this.thicknessMap.isTexture)
      data.thicknessMap = this.thicknessMap.toJSON(meta).uuid;
    if (this.attenuationDistance !== void 0)
      data.attenuationDistance = this.attenuationDistance;
    if (this.attenuationColor !== void 0)
      data.attenuationColor = this.attenuationColor.getHex();
    if (this.size !== void 0)
      data.size = this.size;
    if (this.shadowSide !== null)
      data.shadowSide = this.shadowSide;
    if (this.sizeAttenuation !== void 0)
      data.sizeAttenuation = this.sizeAttenuation;
    if (this.blending !== NormalBlending)
      data.blending = this.blending;
    if (this.side !== FrontSide)
      data.side = this.side;
    if (this.vertexColors)
      data.vertexColors = true;
    if (this.opacity < 1)
      data.opacity = this.opacity;
    if (this.transparent === true)
      data.transparent = this.transparent;
    data.depthFunc = this.depthFunc;
    data.depthTest = this.depthTest;
    data.depthWrite = this.depthWrite;
    data.colorWrite = this.colorWrite;
    data.alphaWrite = this.alphaWrite;
    data.stencilWrite = this.stencilWrite;
    data.stencilWriteMask = this.stencilWriteMask;
    data.stencilFunc = this.stencilFunc;
    data.stencilRef = this.stencilRef;
    data.stencilFuncMask = this.stencilFuncMask;
    data.stencilFail = this.stencilFail;
    data.stencilZFail = this.stencilZFail;
    data.stencilZPass = this.stencilZPass;
    if (this.rotation && this.rotation !== 0)
      data.rotation = this.rotation;
    if (this.polygonOffset === true)
      data.polygonOffset = true;
    if (this.polygonOffsetFactor !== 0)
      data.polygonOffsetFactor = this.polygonOffsetFactor;
    if (this.polygonOffsetUnits !== 0)
      data.polygonOffsetUnits = this.polygonOffsetUnits;
    if (this.linewidth && this.linewidth !== 1)
      data.linewidth = this.linewidth;
    if (this.dashSize !== void 0)
      data.dashSize = this.dashSize;
    if (this.gapSize !== void 0)
      data.gapSize = this.gapSize;
    if (this.scale !== void 0)
      data.scale = this.scale;
    if (this.dithering === true)
      data.dithering = true;
    if (this.alphaTest > 0)
      data.alphaTest = this.alphaTest;
    if (this.alphaToCoverage === true)
      data.alphaToCoverage = this.alphaToCoverage;
    if (this.premultipliedAlpha === true)
      data.premultipliedAlpha = this.premultipliedAlpha;
    if (this.wireframe === true)
      data.wireframe = this.wireframe;
    if (this.wireframeLinewidth > 1)
      data.wireframeLinewidth = this.wireframeLinewidth;
    if (this.wireframeLinecap !== "round")
      data.wireframeLinecap = this.wireframeLinecap;
    if (this.wireframeLinejoin !== "round")
      data.wireframeLinejoin = this.wireframeLinejoin;
    if (this.flatShading === true)
      data.flatShading = this.flatShading;
    if (this.visible === false)
      data.visible = false;
    if (this.toneMapped === false)
      data.toneMapped = false;
    if (JSON.stringify(this.userData) !== "{}")
      data.userData = this.userData;
    function extractFromCache(cache) {
      const values = [];
      for (const key in cache) {
        const data2 = cache[key];
        delete data2.metadata;
        values.push(data2);
      }
      return values;
    }
    if (isRoot) {
      const textures = extractFromCache(meta.textures);
      const images = extractFromCache(meta.images);
      if (textures.length > 0)
        data.textures = textures;
      if (images.length > 0)
        data.images = images;
    }
    return data;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.name = source.name;
    this.fog = source.fog;
    this.blending = source.blending;
    this.side = source.side;
    this.vertexColors = source.vertexColors;
    this.opacity = source.opacity;
    this.transparent = source.transparent;
    this.blendSrc = source.blendSrc;
    this.blendDst = source.blendDst;
    this.blendEquation = source.blendEquation;
    this.blendSrcAlpha = source.blendSrcAlpha;
    this.blendDstAlpha = source.blendDstAlpha;
    this.blendEquationAlpha = source.blendEquationAlpha;
    this.depthFunc = source.depthFunc;
    this.depthTest = source.depthTest;
    this.depthWrite = source.depthWrite;
    this.stencilWriteMask = source.stencilWriteMask;
    this.stencilFunc = source.stencilFunc;
    this.stencilRef = source.stencilRef;
    this.stencilFuncMask = source.stencilFuncMask;
    this.stencilFail = source.stencilFail;
    this.stencilZFail = source.stencilZFail;
    this.stencilZPass = source.stencilZPass;
    this.stencilWrite = source.stencilWrite;
    const srcPlanes = source.clippingPlanes;
    let dstPlanes = null;
    if (srcPlanes !== null) {
      const n = srcPlanes.length;
      dstPlanes = new Array(n);
      for (let i = 0; i !== n; ++i) {
        dstPlanes[i] = srcPlanes[i].clone();
      }
    }
    this.clippingPlanes = dstPlanes;
    this.clipIntersection = source.clipIntersection;
    this.clipShadows = source.clipShadows;
    this.shadowSide = source.shadowSide;
    this.colorWrite = source.colorWrite;
    this.alphaWrite = source.alphaWrite;
    this.precision = source.precision;
    this.polygonOffset = source.polygonOffset;
    this.polygonOffsetFactor = source.polygonOffsetFactor;
    this.polygonOffsetUnits = source.polygonOffsetUnits;
    this.dithering = source.dithering;
    this.alphaTest = source.alphaTest;
    this.alphaToCoverage = source.alphaToCoverage;
    this.premultipliedAlpha = source.premultipliedAlpha;
    this.visible = source.visible;
    this.toneMapped = source.toneMapped;
    this.userData = JSON.parse(JSON.stringify(source.userData));
    return this;
  }
  dispose() {
    this.dispatchEvent({type: "dispose"});
  }
  set needsUpdate(value) {
    if (value === true)
      this.version++;
  }
}
Material.prototype.isMaterial = true;
class MeshBasicMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshBasicMaterial";
    this.color = new Color(16777215);
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    return this;
  }
}
MeshBasicMaterial.prototype.isMeshBasicMaterial = true;
const _vector$9 = /* @__PURE__ */ new Vector3$1();
const _vector2$1 = /* @__PURE__ */ new Vector2$1();
class BufferAttribute {
  constructor(array, itemSize, normalized) {
    if (Array.isArray(array)) {
      throw new TypeError("THREE.BufferAttribute: array should be a Typed Array.");
    }
    this.name = "";
    this.array = array;
    this.itemSize = itemSize;
    this.count = array !== void 0 ? array.length / itemSize : 0;
    this.normalized = normalized === true;
    this.usage = StaticDrawUsage;
    this.updateRange = {offset: 0, count: -1};
    this.version = 0;
  }
  onUploadCallback() {
  }
  set needsUpdate(value) {
    if (value === true)
      this.version++;
  }
  setUsage(value) {
    this.usage = value;
    return this;
  }
  copy(source) {
    this.name = source.name;
    this.array = new source.array.constructor(source.array);
    this.itemSize = source.itemSize;
    this.count = source.count;
    this.normalized = source.normalized;
    this.usage = source.usage;
    return this;
  }
  copyAt(index1, attribute, index2) {
    index1 *= this.itemSize;
    index2 *= attribute.itemSize;
    for (let i = 0, l = this.itemSize; i < l; i++) {
      this.array[index1 + i] = attribute.array[index2 + i];
    }
    return this;
  }
  copyArray(array) {
    this.array.set(array);
    return this;
  }
  copyColorsArray(colors) {
    const array = this.array;
    let offset = 0;
    for (let i = 0, l = colors.length; i < l; i++) {
      let color = colors[i];
      if (color === void 0) {
        console.warn("THREE.BufferAttribute.copyColorsArray(): color is undefined", i);
        color = new Color();
      }
      array[offset++] = color.r;
      array[offset++] = color.g;
      array[offset++] = color.b;
    }
    return this;
  }
  copyVector2sArray(vectors) {
    const array = this.array;
    let offset = 0;
    for (let i = 0, l = vectors.length; i < l; i++) {
      let vector = vectors[i];
      if (vector === void 0) {
        console.warn("THREE.BufferAttribute.copyVector2sArray(): vector is undefined", i);
        vector = new Vector2$1();
      }
      array[offset++] = vector.x;
      array[offset++] = vector.y;
    }
    return this;
  }
  copyVector3sArray(vectors) {
    const array = this.array;
    let offset = 0;
    for (let i = 0, l = vectors.length; i < l; i++) {
      let vector = vectors[i];
      if (vector === void 0) {
        console.warn("THREE.BufferAttribute.copyVector3sArray(): vector is undefined", i);
        vector = new Vector3$1();
      }
      array[offset++] = vector.x;
      array[offset++] = vector.y;
      array[offset++] = vector.z;
    }
    return this;
  }
  copyVector4sArray(vectors) {
    const array = this.array;
    let offset = 0;
    for (let i = 0, l = vectors.length; i < l; i++) {
      let vector = vectors[i];
      if (vector === void 0) {
        console.warn("THREE.BufferAttribute.copyVector4sArray(): vector is undefined", i);
        vector = new Vector4$1();
      }
      array[offset++] = vector.x;
      array[offset++] = vector.y;
      array[offset++] = vector.z;
      array[offset++] = vector.w;
    }
    return this;
  }
  applyMatrix3(m) {
    if (this.itemSize === 2) {
      for (let i = 0, l = this.count; i < l; i++) {
        _vector2$1.fromBufferAttribute(this, i);
        _vector2$1.applyMatrix3(m);
        this.setXY(i, _vector2$1.x, _vector2$1.y);
      }
    } else if (this.itemSize === 3) {
      for (let i = 0, l = this.count; i < l; i++) {
        _vector$9.fromBufferAttribute(this, i);
        _vector$9.applyMatrix3(m);
        this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
      }
    }
    return this;
  }
  applyMatrix4(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.x = this.getX(i);
      _vector$9.y = this.getY(i);
      _vector$9.z = this.getZ(i);
      _vector$9.applyMatrix4(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  applyNormalMatrix(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.x = this.getX(i);
      _vector$9.y = this.getY(i);
      _vector$9.z = this.getZ(i);
      _vector$9.applyNormalMatrix(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  transformDirection(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.x = this.getX(i);
      _vector$9.y = this.getY(i);
      _vector$9.z = this.getZ(i);
      _vector$9.transformDirection(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  set(value, offset = 0) {
    this.array.set(value, offset);
    return this;
  }
  getX(index) {
    return this.array[index * this.itemSize];
  }
  setX(index, x) {
    this.array[index * this.itemSize] = x;
    return this;
  }
  getY(index) {
    return this.array[index * this.itemSize + 1];
  }
  setY(index, y) {
    this.array[index * this.itemSize + 1] = y;
    return this;
  }
  getZ(index) {
    return this.array[index * this.itemSize + 2];
  }
  setZ(index, z) {
    this.array[index * this.itemSize + 2] = z;
    return this;
  }
  getW(index) {
    return this.array[index * this.itemSize + 3];
  }
  setW(index, w) {
    this.array[index * this.itemSize + 3] = w;
    return this;
  }
  setXY(index, x, y) {
    index *= this.itemSize;
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    return this;
  }
  setXYZ(index, x, y, z) {
    index *= this.itemSize;
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    this.array[index + 2] = z;
    return this;
  }
  setXYZW(index, x, y, z, w) {
    index *= this.itemSize;
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    this.array[index + 2] = z;
    this.array[index + 3] = w;
    return this;
  }
  onUpload(callback) {
    this.onUploadCallback = callback;
    return this;
  }
  clone() {
    return new this.constructor(this.array, this.itemSize).copy(this);
  }
  toJSON() {
    const data = {
      itemSize: this.itemSize,
      type: this.array.constructor.name,
      array: Array.prototype.slice.call(this.array),
      normalized: this.normalized
    };
    if (this.name !== "")
      data.name = this.name;
    if (this.usage !== StaticDrawUsage)
      data.usage = this.usage;
    if (this.updateRange.offset !== 0 || this.updateRange.count !== -1)
      data.updateRange = this.updateRange;
    return data;
  }
}
BufferAttribute.prototype.isBufferAttribute = true;
class Uint8BufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized) {
    super(new Uint8Array(array), itemSize, normalized);
  }
}
class Uint16BufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized) {
    super(new Uint16Array(array), itemSize, normalized);
  }
}
class Uint32BufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized) {
    super(new Uint32Array(array), itemSize, normalized);
  }
}
class Float16BufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized) {
    super(new Uint16Array(array), itemSize, normalized);
  }
}
Float16BufferAttribute.prototype.isFloat16BufferAttribute = true;
class Float32BufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized) {
    super(new Float32Array(array), itemSize, normalized);
  }
}
let _id$1 = 0;
const _m1 = /* @__PURE__ */ new Matrix4$1();
const _obj = /* @__PURE__ */ new Object3D();
const _offset = /* @__PURE__ */ new Vector3$1();
const _box$1 = /* @__PURE__ */ new Box3();
const _boxMorphTargets = /* @__PURE__ */ new Box3();
const _vector$8 = /* @__PURE__ */ new Vector3$1();
class BufferGeometry extends EventDispatcher {
  constructor() {
    super();
    Object.defineProperty(this, "id", {value: _id$1++});
    this.uuid = generateUUID();
    this.name = "";
    this.type = "BufferGeometry";
    this.index = null;
    this.attributes = {};
    this.morphAttributes = {};
    this.morphTargetsRelative = false;
    this.groups = [];
    this.boundingBox = null;
    this.boundingSphere = null;
    this.drawRange = {start: 0, count: Infinity};
    this.userData = {};
  }
  getIndex() {
    return this.index;
  }
  setIndex(index) {
    if (Array.isArray(index)) {
      this.index = new (arrayNeedsUint32(index) ? Uint32BufferAttribute : Uint16BufferAttribute)(index, 1);
    } else {
      this.index = index;
    }
    return this;
  }
  getAttribute(name) {
    return this.attributes[name];
  }
  setAttribute(name, attribute) {
    this.attributes[name] = attribute;
    return this;
  }
  deleteAttribute(name) {
    delete this.attributes[name];
    return this;
  }
  hasAttribute(name) {
    return this.attributes[name] !== void 0;
  }
  addGroup(start, count, materialIndex = 0) {
    this.groups.push({
      start,
      count,
      materialIndex
    });
  }
  clearGroups() {
    this.groups = [];
  }
  setDrawRange(start, count) {
    this.drawRange.start = start;
    this.drawRange.count = count;
  }
  applyMatrix4(matrix) {
    const position = this.attributes.position;
    if (position !== void 0) {
      position.applyMatrix4(matrix);
      position.needsUpdate = true;
    }
    const normal = this.attributes.normal;
    if (normal !== void 0) {
      const normalMatrix = new Matrix3$1().getNormalMatrix(matrix);
      normal.applyNormalMatrix(normalMatrix);
      normal.needsUpdate = true;
    }
    const tangent = this.attributes.tangent;
    if (tangent !== void 0) {
      tangent.transformDirection(matrix);
      tangent.needsUpdate = true;
    }
    if (this.boundingBox !== null) {
      this.computeBoundingBox();
    }
    if (this.boundingSphere !== null) {
      this.computeBoundingSphere();
    }
    return this;
  }
  applyQuaternion(q) {
    _m1.makeRotationFromQuaternion(q);
    this.applyMatrix4(_m1);
    return this;
  }
  rotateX(angle) {
    _m1.makeRotationX(angle);
    this.applyMatrix4(_m1);
    return this;
  }
  rotateY(angle) {
    _m1.makeRotationY(angle);
    this.applyMatrix4(_m1);
    return this;
  }
  rotateZ(angle) {
    _m1.makeRotationZ(angle);
    this.applyMatrix4(_m1);
    return this;
  }
  translate(x, y, z) {
    _m1.makeTranslation(x, y, z);
    this.applyMatrix4(_m1);
    return this;
  }
  scale(x, y, z) {
    _m1.makeScale(x, y, z);
    this.applyMatrix4(_m1);
    return this;
  }
  lookAt(vector) {
    _obj.lookAt(vector);
    _obj.updateMatrix();
    this.applyMatrix4(_obj.matrix);
    return this;
  }
  center() {
    this.computeBoundingBox();
    this.boundingBox.getCenter(_offset).negate();
    this.translate(_offset.x, _offset.y, _offset.z);
    return this;
  }
  setFromPoints(points) {
    const position = [];
    for (let i = 0, l = points.length; i < l; i++) {
      const point = points[i];
      position.push(point.x, point.y, point.z || 0);
    }
    this.setAttribute("position", new Float32BufferAttribute(position, 3));
    return this;
  }
  computeBoundingBox() {
    if (this.boundingBox === null) {
      this.boundingBox = new Box3();
    }
    const position = this.attributes.position;
    const morphAttributesPosition = this.morphAttributes.position;
    if (position && position.isGLBufferAttribute) {
      console.error('THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set "mesh.frustumCulled" to "false".', this);
      this.boundingBox.set(new Vector3$1(-Infinity, -Infinity, -Infinity), new Vector3$1(Infinity, Infinity, Infinity));
      return;
    }
    if (position !== void 0) {
      this.boundingBox.setFromBufferAttribute(position);
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          _box$1.setFromBufferAttribute(morphAttribute);
          if (this.morphTargetsRelative) {
            _vector$8.addVectors(this.boundingBox.min, _box$1.min);
            this.boundingBox.expandByPoint(_vector$8);
            _vector$8.addVectors(this.boundingBox.max, _box$1.max);
            this.boundingBox.expandByPoint(_vector$8);
          } else {
            this.boundingBox.expandByPoint(_box$1.min);
            this.boundingBox.expandByPoint(_box$1.max);
          }
        }
      }
    } else {
      this.boundingBox.makeEmpty();
    }
    if (isNaN(this.boundingBox.min.x) || isNaN(this.boundingBox.min.y) || isNaN(this.boundingBox.min.z)) {
      console.error('THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this);
    }
  }
  computeBoundingSphere() {
    if (this.boundingSphere === null) {
      this.boundingSphere = new Sphere();
    }
    const position = this.attributes.position;
    const morphAttributesPosition = this.morphAttributes.position;
    if (position && position.isGLBufferAttribute) {
      console.error('THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere. Alternatively set "mesh.frustumCulled" to "false".', this);
      this.boundingSphere.set(new Vector3$1(), Infinity);
      return;
    }
    if (position) {
      const center = this.boundingSphere.center;
      _box$1.setFromBufferAttribute(position);
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          _boxMorphTargets.setFromBufferAttribute(morphAttribute);
          if (this.morphTargetsRelative) {
            _vector$8.addVectors(_box$1.min, _boxMorphTargets.min);
            _box$1.expandByPoint(_vector$8);
            _vector$8.addVectors(_box$1.max, _boxMorphTargets.max);
            _box$1.expandByPoint(_vector$8);
          } else {
            _box$1.expandByPoint(_boxMorphTargets.min);
            _box$1.expandByPoint(_boxMorphTargets.max);
          }
        }
      }
      _box$1.getCenter(center);
      let maxRadiusSq = 0;
      for (let i = 0, il = position.count; i < il; i++) {
        _vector$8.fromBufferAttribute(position, i);
        maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
      }
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          const morphTargetsRelative = this.morphTargetsRelative;
          for (let j = 0, jl = morphAttribute.count; j < jl; j++) {
            _vector$8.fromBufferAttribute(morphAttribute, j);
            if (morphTargetsRelative) {
              _offset.fromBufferAttribute(position, j);
              _vector$8.add(_offset);
            }
            maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
          }
        }
      }
      this.boundingSphere.radius = Math.sqrt(maxRadiusSq);
      if (isNaN(this.boundingSphere.radius)) {
        console.error('THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this);
      }
    }
  }
  computeTangents() {
    const index = this.index;
    const attributes = this.attributes;
    if (index === null || attributes.position === void 0 || attributes.normal === void 0 || attributes.uv === void 0) {
      console.error("THREE.BufferGeometry: .computeTangents() failed. Missing required attributes (index, position, normal or uv)");
      return;
    }
    const indices = index.array;
    const positions = attributes.position.array;
    const normals = attributes.normal.array;
    const uvs = attributes.uv.array;
    const nVertices = positions.length / 3;
    if (attributes.tangent === void 0) {
      this.setAttribute("tangent", new BufferAttribute(new Float32Array(4 * nVertices), 4));
    }
    const tangents = attributes.tangent.array;
    const tan1 = [], tan2 = [];
    for (let i = 0; i < nVertices; i++) {
      tan1[i] = new Vector3$1();
      tan2[i] = new Vector3$1();
    }
    const vA = new Vector3$1(), vB = new Vector3$1(), vC = new Vector3$1(), uvA = new Vector2$1(), uvB = new Vector2$1(), uvC = new Vector2$1(), sdir = new Vector3$1(), tdir = new Vector3$1();
    function handleTriangle(a, b, c) {
      vA.fromArray(positions, a * 3);
      vB.fromArray(positions, b * 3);
      vC.fromArray(positions, c * 3);
      uvA.fromArray(uvs, a * 2);
      uvB.fromArray(uvs, b * 2);
      uvC.fromArray(uvs, c * 2);
      vB.sub(vA);
      vC.sub(vA);
      uvB.sub(uvA);
      uvC.sub(uvA);
      const r = 1 / (uvB.x * uvC.y - uvC.x * uvB.y);
      if (!isFinite(r))
        return;
      sdir.copy(vB).multiplyScalar(uvC.y).addScaledVector(vC, -uvB.y).multiplyScalar(r);
      tdir.copy(vC).multiplyScalar(uvB.x).addScaledVector(vB, -uvC.x).multiplyScalar(r);
      tan1[a].add(sdir);
      tan1[b].add(sdir);
      tan1[c].add(sdir);
      tan2[a].add(tdir);
      tan2[b].add(tdir);
      tan2[c].add(tdir);
    }
    let groups = this.groups;
    if (groups.length === 0) {
      groups = [{
        start: 0,
        count: indices.length
      }];
    }
    for (let i = 0, il = groups.length; i < il; ++i) {
      const group = groups[i];
      const start = group.start;
      const count = group.count;
      for (let j = start, jl = start + count; j < jl; j += 3) {
        handleTriangle(indices[j + 0], indices[j + 1], indices[j + 2]);
      }
    }
    const tmp2 = new Vector3$1(), tmp22 = new Vector3$1();
    const n = new Vector3$1(), n2 = new Vector3$1();
    function handleVertex(v) {
      n.fromArray(normals, v * 3);
      n2.copy(n);
      const t = tan1[v];
      tmp2.copy(t);
      tmp2.sub(n.multiplyScalar(n.dot(t))).normalize();
      tmp22.crossVectors(n2, t);
      const test = tmp22.dot(tan2[v]);
      const w = test < 0 ? -1 : 1;
      tangents[v * 4] = tmp2.x;
      tangents[v * 4 + 1] = tmp2.y;
      tangents[v * 4 + 2] = tmp2.z;
      tangents[v * 4 + 3] = w;
    }
    for (let i = 0, il = groups.length; i < il; ++i) {
      const group = groups[i];
      const start = group.start;
      const count = group.count;
      for (let j = start, jl = start + count; j < jl; j += 3) {
        handleVertex(indices[j + 0]);
        handleVertex(indices[j + 1]);
        handleVertex(indices[j + 2]);
      }
    }
  }
  computeVertexNormals() {
    const index = this.index;
    const positionAttribute = this.getAttribute("position");
    if (positionAttribute !== void 0) {
      let normalAttribute = this.getAttribute("normal");
      if (normalAttribute === void 0) {
        normalAttribute = new BufferAttribute(new Float32Array(positionAttribute.count * 3), 3);
        this.setAttribute("normal", normalAttribute);
      } else {
        for (let i = 0, il = normalAttribute.count; i < il; i++) {
          normalAttribute.setXYZ(i, 0, 0, 0);
        }
      }
      const pA = new Vector3$1(), pB = new Vector3$1(), pC = new Vector3$1();
      const nA = new Vector3$1(), nB = new Vector3$1(), nC = new Vector3$1();
      const cb = new Vector3$1(), ab = new Vector3$1();
      if (index) {
        for (let i = 0, il = index.count; i < il; i += 3) {
          const vA = index.getX(i + 0);
          const vB = index.getX(i + 1);
          const vC = index.getX(i + 2);
          pA.fromBufferAttribute(positionAttribute, vA);
          pB.fromBufferAttribute(positionAttribute, vB);
          pC.fromBufferAttribute(positionAttribute, vC);
          cb.subVectors(pC, pB);
          ab.subVectors(pA, pB);
          cb.cross(ab);
          nA.fromBufferAttribute(normalAttribute, vA);
          nB.fromBufferAttribute(normalAttribute, vB);
          nC.fromBufferAttribute(normalAttribute, vC);
          nA.add(cb);
          nB.add(cb);
          nC.add(cb);
          normalAttribute.setXYZ(vA, nA.x, nA.y, nA.z);
          normalAttribute.setXYZ(vB, nB.x, nB.y, nB.z);
          normalAttribute.setXYZ(vC, nC.x, nC.y, nC.z);
        }
      } else {
        for (let i = 0, il = positionAttribute.count; i < il; i += 3) {
          pA.fromBufferAttribute(positionAttribute, i + 0);
          pB.fromBufferAttribute(positionAttribute, i + 1);
          pC.fromBufferAttribute(positionAttribute, i + 2);
          cb.subVectors(pC, pB);
          ab.subVectors(pA, pB);
          cb.cross(ab);
          normalAttribute.setXYZ(i + 0, cb.x, cb.y, cb.z);
          normalAttribute.setXYZ(i + 1, cb.x, cb.y, cb.z);
          normalAttribute.setXYZ(i + 2, cb.x, cb.y, cb.z);
        }
      }
      this.normalizeNormals();
      normalAttribute.needsUpdate = true;
    }
  }
  merge(geometry, offset) {
    if (!(geometry && geometry.isBufferGeometry)) {
      console.error("THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.", geometry);
      return;
    }
    if (offset === void 0) {
      offset = 0;
      console.warn("THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.");
    }
    const attributes = this.attributes;
    for (const key in attributes) {
      if (geometry.attributes[key] === void 0)
        continue;
      const attribute1 = attributes[key];
      const attributeArray1 = attribute1.array;
      const attribute2 = geometry.attributes[key];
      const attributeArray2 = attribute2.array;
      const attributeOffset = attribute2.itemSize * offset;
      const length = Math.min(attributeArray2.length, attributeArray1.length - attributeOffset);
      for (let i = 0, j = attributeOffset; i < length; i++, j++) {
        attributeArray1[j] = attributeArray2[i];
      }
    }
    return this;
  }
  normalizeNormals() {
    const normals = this.attributes.normal;
    for (let i = 0, il = normals.count; i < il; i++) {
      _vector$8.fromBufferAttribute(normals, i);
      _vector$8.normalize();
      normals.setXYZ(i, _vector$8.x, _vector$8.y, _vector$8.z);
    }
  }
  toNonIndexed() {
    function convertBufferAttribute(attribute, indices2) {
      const array = attribute.array;
      const itemSize = attribute.itemSize;
      const normalized = attribute.normalized;
      const array2 = new array.constructor(indices2.length * itemSize);
      let index = 0, index2 = 0;
      for (let i = 0, l = indices2.length; i < l; i++) {
        if (attribute.isInterleavedBufferAttribute) {
          index = indices2[i] * attribute.data.stride + attribute.offset;
        } else {
          index = indices2[i] * itemSize;
        }
        for (let j = 0; j < itemSize; j++) {
          array2[index2++] = array[index++];
        }
      }
      return new BufferAttribute(array2, itemSize, normalized);
    }
    if (this.index === null) {
      console.warn("THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed.");
      return this;
    }
    const geometry2 = new BufferGeometry();
    const indices = this.index.array;
    const attributes = this.attributes;
    for (const name in attributes) {
      const attribute = attributes[name];
      const newAttribute = convertBufferAttribute(attribute, indices);
      geometry2.setAttribute(name, newAttribute);
    }
    const morphAttributes = this.morphAttributes;
    for (const name in morphAttributes) {
      const morphArray = [];
      const morphAttribute = morphAttributes[name];
      for (let i = 0, il = morphAttribute.length; i < il; i++) {
        const attribute = morphAttribute[i];
        const newAttribute = convertBufferAttribute(attribute, indices);
        morphArray.push(newAttribute);
      }
      geometry2.morphAttributes[name] = morphArray;
    }
    geometry2.morphTargetsRelative = this.morphTargetsRelative;
    const groups = this.groups;
    for (let i = 0, l = groups.length; i < l; i++) {
      const group = groups[i];
      geometry2.addGroup(group.start, group.count, group.materialIndex);
    }
    return geometry2;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.5,
        type: "BufferGeometry",
        generator: "BufferGeometry.toJSON"
      }
    };
    data.uuid = this.uuid;
    data.type = this.type;
    if (this.name !== "")
      data.name = this.name;
    if (Object.keys(this.userData).length > 0)
      data.userData = this.userData;
    if (this.parameters !== void 0) {
      const parameters = this.parameters;
      for (const key in parameters) {
        if (parameters[key] !== void 0)
          data[key] = parameters[key];
      }
      return data;
    }
    data.data = {attributes: {}};
    const index = this.index;
    if (index !== null) {
      data.data.index = {
        type: index.array.constructor.name,
        array: Array.prototype.slice.call(index.array)
      };
    }
    const attributes = this.attributes;
    for (const key in attributes) {
      const attribute = attributes[key];
      data.data.attributes[key] = attribute.toJSON(data.data);
    }
    const morphAttributes = {};
    let hasMorphAttributes = false;
    for (const key in this.morphAttributes) {
      const attributeArray = this.morphAttributes[key];
      const array = [];
      for (let i = 0, il = attributeArray.length; i < il; i++) {
        const attribute = attributeArray[i];
        array.push(attribute.toJSON(data.data));
      }
      if (array.length > 0) {
        morphAttributes[key] = array;
        hasMorphAttributes = true;
      }
    }
    if (hasMorphAttributes) {
      data.data.morphAttributes = morphAttributes;
      data.data.morphTargetsRelative = this.morphTargetsRelative;
    }
    const groups = this.groups;
    if (groups.length > 0) {
      data.data.groups = JSON.parse(JSON.stringify(groups));
    }
    const boundingSphere = this.boundingSphere;
    if (boundingSphere !== null) {
      data.data.boundingSphere = {
        center: boundingSphere.center.toArray(),
        radius: boundingSphere.radius
      };
    }
    return data;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.index = null;
    this.attributes = {};
    this.morphAttributes = {};
    this.groups = [];
    this.boundingBox = null;
    this.boundingSphere = null;
    const data = {};
    this.name = source.name;
    const index = source.index;
    if (index !== null) {
      this.setIndex(index.clone(data));
    }
    const attributes = source.attributes;
    for (const name in attributes) {
      const attribute = attributes[name];
      this.setAttribute(name, attribute.clone(data));
    }
    const morphAttributes = source.morphAttributes;
    for (const name in morphAttributes) {
      const array = [];
      const morphAttribute = morphAttributes[name];
      for (let i = 0, l = morphAttribute.length; i < l; i++) {
        array.push(morphAttribute[i].clone(data));
      }
      this.morphAttributes[name] = array;
    }
    this.morphTargetsRelative = source.morphTargetsRelative;
    const groups = source.groups;
    for (let i = 0, l = groups.length; i < l; i++) {
      const group = groups[i];
      this.addGroup(group.start, group.count, group.materialIndex);
    }
    const boundingBox = source.boundingBox;
    if (boundingBox !== null) {
      this.boundingBox = boundingBox.clone();
    }
    const boundingSphere = source.boundingSphere;
    if (boundingSphere !== null) {
      this.boundingSphere = boundingSphere.clone();
    }
    this.drawRange.start = source.drawRange.start;
    this.drawRange.count = source.drawRange.count;
    this.userData = source.userData;
    if (source.parameters !== void 0)
      this.parameters = Object.assign({}, source.parameters);
    return this;
  }
  dispose() {
    this.dispatchEvent({type: "dispose"});
  }
}
BufferGeometry.prototype.isBufferGeometry = true;
const _inverseMatrix$2 = /* @__PURE__ */ new Matrix4$1();
const _ray$2 = /* @__PURE__ */ new Ray();
const _sphere$3 = /* @__PURE__ */ new Sphere();
const _vA$1 = /* @__PURE__ */ new Vector3$1();
const _vB$1 = /* @__PURE__ */ new Vector3$1();
const _vC$1 = /* @__PURE__ */ new Vector3$1();
const _tempA = /* @__PURE__ */ new Vector3$1();
const _tempB = /* @__PURE__ */ new Vector3$1();
const _tempC = /* @__PURE__ */ new Vector3$1();
const _morphA = /* @__PURE__ */ new Vector3$1();
const _morphB = /* @__PURE__ */ new Vector3$1();
const _morphC = /* @__PURE__ */ new Vector3$1();
const _uvA$1 = /* @__PURE__ */ new Vector2$1();
const _uvB$1 = /* @__PURE__ */ new Vector2$1();
const _uvC$1 = /* @__PURE__ */ new Vector2$1();
const _intersectionPoint = /* @__PURE__ */ new Vector3$1();
const _intersectionPointWorld = /* @__PURE__ */ new Vector3$1();
class Mesh extends Object3D {
  constructor(geometry = new BufferGeometry(), material = new MeshBasicMaterial()) {
    super();
    this.type = "Mesh";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source) {
    super.copy(source);
    if (source.morphTargetInfluences !== void 0) {
      this.morphTargetInfluences = source.morphTargetInfluences.slice();
    }
    if (source.morphTargetDictionary !== void 0) {
      this.morphTargetDictionary = Object.assign({}, source.morphTargetDictionary);
    }
    this.material = source.material;
    this.geometry = source.geometry;
    return this;
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    if (geometry.isBufferGeometry) {
      const morphAttributes = geometry.morphAttributes;
      const keys = Object.keys(morphAttributes);
      if (keys.length > 0) {
        const morphAttribute = morphAttributes[keys[0]];
        if (morphAttribute !== void 0) {
          this.morphTargetInfluences = [];
          this.morphTargetDictionary = {};
          for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
            const name = morphAttribute[m].name || String(m);
            this.morphTargetInfluences.push(0);
            this.morphTargetDictionary[name] = m;
          }
        }
      }
    } else {
      const morphTargets = geometry.morphTargets;
      if (morphTargets !== void 0 && morphTargets.length > 0) {
        console.error("THREE.Mesh.updateMorphTargets() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
      }
    }
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const material = this.material;
    const matrixWorld = this.matrixWorld;
    if (material === void 0)
      return;
    if (geometry.boundingSphere === null)
      geometry.computeBoundingSphere();
    _sphere$3.copy(geometry.boundingSphere);
    _sphere$3.applyMatrix4(matrixWorld);
    if (raycaster.ray.intersectsSphere(_sphere$3) === false)
      return;
    _inverseMatrix$2.copy(matrixWorld).invert();
    _ray$2.copy(raycaster.ray).applyMatrix4(_inverseMatrix$2);
    if (geometry.boundingBox !== null) {
      if (_ray$2.intersectsBox(geometry.boundingBox) === false)
        return;
    }
    let intersection;
    if (geometry.isBufferGeometry) {
      const index = geometry.index;
      const position = geometry.attributes.position;
      const morphPosition = geometry.morphAttributes.position;
      const morphTargetsRelative = geometry.morphTargetsRelative;
      const uv = geometry.attributes.uv;
      const uv2 = geometry.attributes.uv2;
      const groups = geometry.groups;
      const drawRange = geometry.drawRange;
      if (index !== null) {
        if (Array.isArray(material)) {
          for (let i = 0, il = groups.length; i < il; i++) {
            const group = groups[i];
            const groupMaterial = material[group.materialIndex];
            const start = Math.max(group.start, drawRange.start);
            const end = Math.min(index.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));
            for (let j = start, jl = end; j < jl; j += 3) {
              const a = index.getX(j);
              const b = index.getX(j + 1);
              const c = index.getX(j + 2);
              intersection = checkBufferGeometryIntersection(this, groupMaterial, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);
              if (intersection) {
                intersection.faceIndex = Math.floor(j / 3);
                intersection.face.materialIndex = group.materialIndex;
                intersects2.push(intersection);
              }
            }
          }
        } else {
          const start = Math.max(0, drawRange.start);
          const end = Math.min(index.count, drawRange.start + drawRange.count);
          for (let i = start, il = end; i < il; i += 3) {
            const a = index.getX(i);
            const b = index.getX(i + 1);
            const c = index.getX(i + 2);
            intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);
            if (intersection) {
              intersection.faceIndex = Math.floor(i / 3);
              intersects2.push(intersection);
            }
          }
        }
      } else if (position !== void 0) {
        if (Array.isArray(material)) {
          for (let i = 0, il = groups.length; i < il; i++) {
            const group = groups[i];
            const groupMaterial = material[group.materialIndex];
            const start = Math.max(group.start, drawRange.start);
            const end = Math.min(position.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));
            for (let j = start, jl = end; j < jl; j += 3) {
              const a = j;
              const b = j + 1;
              const c = j + 2;
              intersection = checkBufferGeometryIntersection(this, groupMaterial, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);
              if (intersection) {
                intersection.faceIndex = Math.floor(j / 3);
                intersection.face.materialIndex = group.materialIndex;
                intersects2.push(intersection);
              }
            }
          }
        } else {
          const start = Math.max(0, drawRange.start);
          const end = Math.min(position.count, drawRange.start + drawRange.count);
          for (let i = start, il = end; i < il; i += 3) {
            const a = i;
            const b = i + 1;
            const c = i + 2;
            intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);
            if (intersection) {
              intersection.faceIndex = Math.floor(i / 3);
              intersects2.push(intersection);
            }
          }
        }
      }
    } else if (geometry.isGeometry) {
      console.error("THREE.Mesh.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
    }
  }
}
Mesh.prototype.isMesh = true;
function checkIntersection(object, material, raycaster, ray, pA, pB, pC, point) {
  let intersect;
  if (material.side === BackSide) {
    intersect = ray.intersectTriangle(pC, pB, pA, true, point);
  } else {
    intersect = ray.intersectTriangle(pA, pB, pC, material.side !== DoubleSide, point);
  }
  if (intersect === null)
    return null;
  _intersectionPointWorld.copy(point);
  _intersectionPointWorld.applyMatrix4(object.matrixWorld);
  const distance = raycaster.ray.origin.distanceTo(_intersectionPointWorld);
  if (distance < raycaster.near || distance > raycaster.far)
    return null;
  return {
    distance,
    point: _intersectionPointWorld.clone(),
    object
  };
}
function checkBufferGeometryIntersection(object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c) {
  _vA$1.fromBufferAttribute(position, a);
  _vB$1.fromBufferAttribute(position, b);
  _vC$1.fromBufferAttribute(position, c);
  const morphInfluences = object.morphTargetInfluences;
  if (morphPosition && morphInfluences) {
    _morphA.set(0, 0, 0);
    _morphB.set(0, 0, 0);
    _morphC.set(0, 0, 0);
    for (let i = 0, il = morphPosition.length; i < il; i++) {
      const influence = morphInfluences[i];
      const morphAttribute = morphPosition[i];
      if (influence === 0)
        continue;
      _tempA.fromBufferAttribute(morphAttribute, a);
      _tempB.fromBufferAttribute(morphAttribute, b);
      _tempC.fromBufferAttribute(morphAttribute, c);
      if (morphTargetsRelative) {
        _morphA.addScaledVector(_tempA, influence);
        _morphB.addScaledVector(_tempB, influence);
        _morphC.addScaledVector(_tempC, influence);
      } else {
        _morphA.addScaledVector(_tempA.sub(_vA$1), influence);
        _morphB.addScaledVector(_tempB.sub(_vB$1), influence);
        _morphC.addScaledVector(_tempC.sub(_vC$1), influence);
      }
    }
    _vA$1.add(_morphA);
    _vB$1.add(_morphB);
    _vC$1.add(_morphC);
  }
  if (object.isSkinnedMesh) {
    object.boneTransform(a, _vA$1);
    object.boneTransform(b, _vB$1);
    object.boneTransform(c, _vC$1);
  }
  const intersection = checkIntersection(object, material, raycaster, ray, _vA$1, _vB$1, _vC$1, _intersectionPoint);
  if (intersection) {
    if (uv) {
      _uvA$1.fromBufferAttribute(uv, a);
      _uvB$1.fromBufferAttribute(uv, b);
      _uvC$1.fromBufferAttribute(uv, c);
      intersection.uv = Triangle.getUV(_intersectionPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2$1());
    }
    if (uv2) {
      _uvA$1.fromBufferAttribute(uv2, a);
      _uvB$1.fromBufferAttribute(uv2, b);
      _uvC$1.fromBufferAttribute(uv2, c);
      intersection.uv2 = Triangle.getUV(_intersectionPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2$1());
    }
    const face = {
      a,
      b,
      c,
      normal: new Vector3$1(),
      materialIndex: 0
    };
    Triangle.getNormal(_vA$1, _vB$1, _vC$1, face.normal);
    intersection.face = face;
  }
  return intersection;
}
class BoxGeometry extends BufferGeometry {
  constructor(width = 1, height = 1, depth = 1, widthSegments = 1, heightSegments = 1, depthSegments = 1) {
    super();
    this.type = "BoxGeometry";
    this.parameters = {
      width,
      height,
      depth,
      widthSegments,
      heightSegments,
      depthSegments
    };
    const scope = this;
    widthSegments = Math.floor(widthSegments);
    heightSegments = Math.floor(heightSegments);
    depthSegments = Math.floor(depthSegments);
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    let numberOfVertices = 0;
    let groupStart = 0;
    buildPlane("z", "y", "x", -1, -1, depth, height, width, depthSegments, heightSegments, 0);
    buildPlane("z", "y", "x", 1, -1, depth, height, -width, depthSegments, heightSegments, 1);
    buildPlane("x", "z", "y", 1, 1, width, depth, height, widthSegments, depthSegments, 2);
    buildPlane("x", "z", "y", 1, -1, width, depth, -height, widthSegments, depthSegments, 3);
    buildPlane("x", "y", "z", 1, -1, width, height, depth, widthSegments, heightSegments, 4);
    buildPlane("x", "y", "z", -1, -1, width, height, -depth, widthSegments, heightSegments, 5);
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
    function buildPlane(u, v, w, udir, vdir, width2, height2, depth2, gridX, gridY, materialIndex) {
      const segmentWidth = width2 / gridX;
      const segmentHeight = height2 / gridY;
      const widthHalf = width2 / 2;
      const heightHalf = height2 / 2;
      const depthHalf = depth2 / 2;
      const gridX1 = gridX + 1;
      const gridY1 = gridY + 1;
      let vertexCounter = 0;
      let groupCount = 0;
      const vector = new Vector3$1();
      for (let iy = 0; iy < gridY1; iy++) {
        const y = iy * segmentHeight - heightHalf;
        for (let ix = 0; ix < gridX1; ix++) {
          const x = ix * segmentWidth - widthHalf;
          vector[u] = x * udir;
          vector[v] = y * vdir;
          vector[w] = depthHalf;
          vertices.push(vector.x, vector.y, vector.z);
          vector[u] = 0;
          vector[v] = 0;
          vector[w] = depth2 > 0 ? 1 : -1;
          normals.push(vector.x, vector.y, vector.z);
          uvs.push(ix / gridX);
          uvs.push(1 - iy / gridY);
          vertexCounter += 1;
        }
      }
      for (let iy = 0; iy < gridY; iy++) {
        for (let ix = 0; ix < gridX; ix++) {
          const a = numberOfVertices + ix + gridX1 * iy;
          const b = numberOfVertices + ix + gridX1 * (iy + 1);
          const c = numberOfVertices + (ix + 1) + gridX1 * (iy + 1);
          const d = numberOfVertices + (ix + 1) + gridX1 * iy;
          indices.push(a, b, d);
          indices.push(b, c, d);
          groupCount += 6;
        }
      }
      scope.addGroup(groupStart, groupCount, materialIndex);
      groupStart += groupCount;
      numberOfVertices += vertexCounter;
    }
  }
  static fromJSON(data) {
    return new BoxGeometry(data.width, data.height, data.depth, data.widthSegments, data.heightSegments, data.depthSegments);
  }
}
function cloneUniforms(src) {
  const dst = {};
  for (const u in src) {
    dst[u] = {};
    for (const p in src[u]) {
      const property = src[u][p];
      if (property && (property.isColor || property.isMatrix3 || property.isMatrix4 || property.isVector2 || property.isVector3 || property.isVector4 || property.isTexture || property.isQuaternion)) {
        dst[u][p] = property.clone();
      } else if (Array.isArray(property)) {
        dst[u][p] = property.slice();
      } else {
        dst[u][p] = property;
      }
    }
  }
  return dst;
}
function mergeUniforms(uniforms) {
  const merged = {};
  for (let u = 0; u < uniforms.length; u++) {
    const tmp2 = cloneUniforms(uniforms[u]);
    for (const p in tmp2) {
      merged[p] = tmp2[p];
    }
  }
  return merged;
}
const UniformsUtils = {clone: cloneUniforms, merge: mergeUniforms};
var default_vertex = "void main() {\n	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}";
var default_fragment = "void main() {\n	gl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}";
class ShaderMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "ShaderMaterial";
    this.defines = {};
    this.uniforms = {};
    this.vertexShader = default_vertex;
    this.fragmentShader = default_fragment;
    this.linewidth = 1;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.fog = false;
    this.lights = false;
    this.clipping = false;
    this.extensions = {
      derivatives: false,
      fragDepth: false,
      drawBuffers: false,
      shaderTextureLOD: false
    };
    this.defaultAttributeValues = {
      color: [1, 1, 1],
      uv: [0, 0],
      uv2: [0, 0]
    };
    this.index0AttributeName = void 0;
    this.uniformsNeedUpdate = false;
    this.glslVersion = null;
    if (parameters !== void 0) {
      if (parameters.attributes !== void 0) {
        console.error("THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.");
      }
      this.setValues(parameters);
    }
  }
  copy(source) {
    super.copy(source);
    this.fragmentShader = source.fragmentShader;
    this.vertexShader = source.vertexShader;
    this.uniforms = cloneUniforms(source.uniforms);
    this.defines = Object.assign({}, source.defines);
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.lights = source.lights;
    this.clipping = source.clipping;
    this.extensions = Object.assign({}, source.extensions);
    this.glslVersion = source.glslVersion;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.glslVersion = this.glslVersion;
    data.uniforms = {};
    for (const name in this.uniforms) {
      const uniform = this.uniforms[name];
      const value = uniform.value;
      if (value && value.isTexture) {
        data.uniforms[name] = {
          type: "t",
          value: value.toJSON(meta).uuid
        };
      } else if (value && value.isColor) {
        data.uniforms[name] = {
          type: "c",
          value: value.getHex()
        };
      } else if (value && value.isVector2) {
        data.uniforms[name] = {
          type: "v2",
          value: value.toArray()
        };
      } else if (value && value.isVector3) {
        data.uniforms[name] = {
          type: "v3",
          value: value.toArray()
        };
      } else if (value && value.isVector4) {
        data.uniforms[name] = {
          type: "v4",
          value: value.toArray()
        };
      } else if (value && value.isMatrix3) {
        data.uniforms[name] = {
          type: "m3",
          value: value.toArray()
        };
      } else if (value && value.isMatrix4) {
        data.uniforms[name] = {
          type: "m4",
          value: value.toArray()
        };
      } else {
        data.uniforms[name] = {
          value
        };
      }
    }
    if (Object.keys(this.defines).length > 0)
      data.defines = this.defines;
    data.vertexShader = this.vertexShader;
    data.fragmentShader = this.fragmentShader;
    const extensions = {};
    for (const key in this.extensions) {
      if (this.extensions[key] === true)
        extensions[key] = true;
    }
    if (Object.keys(extensions).length > 0)
      data.extensions = extensions;
    return data;
  }
}
ShaderMaterial.prototype.isShaderMaterial = true;
class Camera extends Object3D {
  constructor() {
    super();
    this.type = "Camera";
    this.matrixWorldInverse = new Matrix4$1();
    this.projectionMatrix = new Matrix4$1();
    this.projectionMatrixInverse = new Matrix4$1();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.matrixWorldInverse.copy(source.matrixWorldInverse);
    this.projectionMatrix.copy(source.projectionMatrix);
    this.projectionMatrixInverse.copy(source.projectionMatrixInverse);
    return this;
  }
  getWorldDirection(target) {
    this.updateWorldMatrix(true, false);
    const e = this.matrixWorld.elements;
    return target.set(-e[8], -e[9], -e[10]).normalize();
  }
  updateMatrixWorld(force) {
    super.updateMatrixWorld(force);
    this.matrixWorldInverse.copy(this.matrixWorld).invert();
  }
  updateWorldMatrix(updateParents, updateChildren) {
    super.updateWorldMatrix(updateParents, updateChildren);
    this.matrixWorldInverse.copy(this.matrixWorld).invert();
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
Camera.prototype.isCamera = true;
class PerspectiveCamera extends Camera {
  constructor(fov2 = 50, aspect2 = 1, near = 0.1, far = 2e3) {
    super();
    this.type = "PerspectiveCamera";
    this.fov = fov2;
    this.zoom = 1;
    this.near = near;
    this.far = far;
    this.focus = 10;
    this.aspect = aspect2;
    this.view = null;
    this.filmGauge = 35;
    this.filmOffset = 0;
    this.updateProjectionMatrix();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.fov = source.fov;
    this.zoom = source.zoom;
    this.near = source.near;
    this.far = source.far;
    this.focus = source.focus;
    this.aspect = source.aspect;
    this.view = source.view === null ? null : Object.assign({}, source.view);
    this.filmGauge = source.filmGauge;
    this.filmOffset = source.filmOffset;
    return this;
  }
  setFocalLength(focalLength) {
    const vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;
    this.fov = RAD2DEG * 2 * Math.atan(vExtentSlope);
    this.updateProjectionMatrix();
  }
  getFocalLength() {
    const vExtentSlope = Math.tan(DEG2RAD * 0.5 * this.fov);
    return 0.5 * this.getFilmHeight() / vExtentSlope;
  }
  getEffectiveFOV() {
    return RAD2DEG * 2 * Math.atan(Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom);
  }
  getFilmWidth() {
    return this.filmGauge * Math.min(this.aspect, 1);
  }
  getFilmHeight() {
    return this.filmGauge / Math.max(this.aspect, 1);
  }
  setViewOffset(fullWidth, fullHeight, x, y, width, height) {
    this.aspect = fullWidth / fullHeight;
    if (this.view === null) {
      this.view = {
        enabled: true,
        fullWidth: 1,
        fullHeight: 1,
        offsetX: 0,
        offsetY: 0,
        width: 1,
        height: 1
      };
    }
    this.view.enabled = true;
    this.view.fullWidth = fullWidth;
    this.view.fullHeight = fullHeight;
    this.view.offsetX = x;
    this.view.offsetY = y;
    this.view.width = width;
    this.view.height = height;
    this.updateProjectionMatrix();
  }
  clearViewOffset() {
    if (this.view !== null) {
      this.view.enabled = false;
    }
    this.updateProjectionMatrix();
  }
  updateProjectionMatrix() {
    const near = this.near;
    let top = near * Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom;
    let height = 2 * top;
    let width = this.aspect * height;
    let left = -0.5 * width;
    const view = this.view;
    if (this.view !== null && this.view.enabled) {
      const fullWidth = view.fullWidth, fullHeight = view.fullHeight;
      left += view.offsetX * width / fullWidth;
      top -= view.offsetY * height / fullHeight;
      width *= view.width / fullWidth;
      height *= view.height / fullHeight;
    }
    const skew = this.filmOffset;
    if (skew !== 0)
      left += near * skew / this.getFilmWidth();
    this.projectionMatrix.makePerspective(left, left + width, top, top - height, near, this.far);
    this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.fov = this.fov;
    data.object.zoom = this.zoom;
    data.object.near = this.near;
    data.object.far = this.far;
    data.object.focus = this.focus;
    data.object.aspect = this.aspect;
    if (this.view !== null)
      data.object.view = Object.assign({}, this.view);
    data.object.filmGauge = this.filmGauge;
    data.object.filmOffset = this.filmOffset;
    return data;
  }
}
PerspectiveCamera.prototype.isPerspectiveCamera = true;
const fov = 90, aspect = 1;
class CubeCamera extends Object3D {
  constructor(near, far, renderTarget) {
    super();
    this.type = "CubeCamera";
    if (renderTarget.isWebGLCubeRenderTarget !== true) {
      console.error("THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.");
      return;
    }
    this.renderTarget = renderTarget;
    const cameraPX = new PerspectiveCamera(fov, aspect, near, far);
    cameraPX.layers = this.layers;
    cameraPX.up.set(0, -1, 0);
    cameraPX.lookAt(new Vector3$1(1, 0, 0));
    this.add(cameraPX);
    const cameraNX = new PerspectiveCamera(fov, aspect, near, far);
    cameraNX.layers = this.layers;
    cameraNX.up.set(0, -1, 0);
    cameraNX.lookAt(new Vector3$1(-1, 0, 0));
    this.add(cameraNX);
    const cameraPY = new PerspectiveCamera(fov, aspect, near, far);
    cameraPY.layers = this.layers;
    cameraPY.up.set(0, 0, 1);
    cameraPY.lookAt(new Vector3$1(0, 1, 0));
    this.add(cameraPY);
    const cameraNY = new PerspectiveCamera(fov, aspect, near, far);
    cameraNY.layers = this.layers;
    cameraNY.up.set(0, 0, -1);
    cameraNY.lookAt(new Vector3$1(0, -1, 0));
    this.add(cameraNY);
    const cameraPZ = new PerspectiveCamera(fov, aspect, near, far);
    cameraPZ.layers = this.layers;
    cameraPZ.up.set(0, -1, 0);
    cameraPZ.lookAt(new Vector3$1(0, 0, 1));
    this.add(cameraPZ);
    const cameraNZ = new PerspectiveCamera(fov, aspect, near, far);
    cameraNZ.layers = this.layers;
    cameraNZ.up.set(0, -1, 0);
    cameraNZ.lookAt(new Vector3$1(0, 0, -1));
    this.add(cameraNZ);
  }
  update(renderer, scene) {
    if (this.parent === null)
      this.updateMatrixWorld();
    const renderTarget = this.renderTarget;
    const [cameraPX, cameraNX, cameraPY, cameraNY, cameraPZ, cameraNZ] = this.children;
    const currentXrEnabled = renderer.xr.enabled;
    const currentRenderTarget = renderer.getRenderTarget();
    renderer.xr.enabled = false;
    const generateMipmaps = renderTarget.texture.generateMipmaps;
    renderTarget.texture.generateMipmaps = false;
    renderer.setRenderTarget(renderTarget, 0);
    renderer.render(scene, cameraPX);
    renderer.setRenderTarget(renderTarget, 1);
    renderer.render(scene, cameraNX);
    renderer.setRenderTarget(renderTarget, 2);
    renderer.render(scene, cameraPY);
    renderer.setRenderTarget(renderTarget, 3);
    renderer.render(scene, cameraNY);
    renderer.setRenderTarget(renderTarget, 4);
    renderer.render(scene, cameraPZ);
    renderTarget.texture.generateMipmaps = generateMipmaps;
    renderer.setRenderTarget(renderTarget, 5);
    renderer.render(scene, cameraNZ);
    renderer.setRenderTarget(currentRenderTarget);
    renderer.xr.enabled = currentXrEnabled;
    renderTarget.texture.needsPMREMUpdate = true;
  }
}
class CubeTexture extends Texture {
  constructor(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding) {
    images = images !== void 0 ? images : [];
    mapping = mapping !== void 0 ? mapping : CubeReflectionMapping;
    super(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
    this.flipY = false;
  }
  get images() {
    return this.image;
  }
  set images(value) {
    this.image = value;
  }
}
CubeTexture.prototype.isCubeTexture = true;
class WebGLCubeRenderTarget extends WebGLRenderTarget {
  constructor(size, options, dummy) {
    if (Number.isInteger(options)) {
      console.warn("THREE.WebGLCubeRenderTarget: constructor signature is now WebGLCubeRenderTarget( size, options )");
      options = dummy;
    }
    super(size, size, options);
    options = options || {};
    this.texture = new CubeTexture(void 0, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding);
    this.texture.isRenderTargetTexture = true;
    this.texture.generateMipmaps = options.generateMipmaps !== void 0 ? options.generateMipmaps : false;
    this.texture.minFilter = options.minFilter !== void 0 ? options.minFilter : LinearFilter;
  }
  fromEquirectangularTexture(renderer, texture) {
    this.texture.type = texture.type;
    this.texture.format = RGBAFormat;
    this.texture.encoding = texture.encoding;
    this.texture.generateMipmaps = texture.generateMipmaps;
    this.texture.minFilter = texture.minFilter;
    this.texture.magFilter = texture.magFilter;
    const shader = {
      uniforms: {
        tEquirect: {value: null}
      },
      vertexShader: `

				varying vec3 vWorldDirection;

				vec3 transformDirection( in vec3 dir, in mat4 matrix ) {

					return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );

				}

				void main() {

					vWorldDirection = transformDirection( position, modelMatrix );

					#include <begin_vertex>
					#include <project_vertex>

				}
			`,
      fragmentShader: `

				uniform sampler2D tEquirect;

				varying vec3 vWorldDirection;

				#include <common>

				void main() {

					vec3 direction = normalize( vWorldDirection );

					vec2 sampleUV = equirectUv( direction );

					gl_FragColor = texture2D( tEquirect, sampleUV );

				}
			`
    };
    const geometry = new BoxGeometry(5, 5, 5);
    const material = new ShaderMaterial({
      name: "CubemapFromEquirect",
      uniforms: cloneUniforms(shader.uniforms),
      vertexShader: shader.vertexShader,
      fragmentShader: shader.fragmentShader,
      side: BackSide,
      blending: NoBlending
    });
    material.uniforms.tEquirect.value = texture;
    const mesh = new Mesh(geometry, material);
    const currentMinFilter = texture.minFilter;
    if (texture.minFilter === LinearMipmapLinearFilter)
      texture.minFilter = LinearFilter;
    const camera = new CubeCamera(1, 10, this);
    camera.update(renderer, mesh);
    texture.minFilter = currentMinFilter;
    mesh.geometry.dispose();
    mesh.material.dispose();
    return this;
  }
  clear(renderer, color, depth, stencil) {
    const currentRenderTarget = renderer.getRenderTarget();
    for (let i = 0; i < 6; i++) {
      renderer.setRenderTarget(this, i);
      renderer.clear(color, depth, stencil);
    }
    renderer.setRenderTarget(currentRenderTarget);
  }
}
WebGLCubeRenderTarget.prototype.isWebGLCubeRenderTarget = true;
const _vector1 = /* @__PURE__ */ new Vector3$1();
const _vector2 = /* @__PURE__ */ new Vector3$1();
const _normalMatrix = /* @__PURE__ */ new Matrix3$1();
class Plane$1 {
  constructor(normal = new Vector3$1(1, 0, 0), constant = 0) {
    this.normal = normal;
    this.constant = constant;
  }
  set(normal, constant) {
    this.normal.copy(normal);
    this.constant = constant;
    return this;
  }
  setComponents(x, y, z, w) {
    this.normal.set(x, y, z);
    this.constant = w;
    return this;
  }
  setFromNormalAndCoplanarPoint(normal, point) {
    this.normal.copy(normal);
    this.constant = -point.dot(this.normal);
    return this;
  }
  setFromCoplanarPoints(a, b, c) {
    const normal = _vector1.subVectors(c, b).cross(_vector2.subVectors(a, b)).normalize();
    this.setFromNormalAndCoplanarPoint(normal, a);
    return this;
  }
  copy(plane) {
    this.normal.copy(plane.normal);
    this.constant = plane.constant;
    return this;
  }
  normalize() {
    const inverseNormalLength = 1 / this.normal.length();
    this.normal.multiplyScalar(inverseNormalLength);
    this.constant *= inverseNormalLength;
    return this;
  }
  negate() {
    this.constant *= -1;
    this.normal.negate();
    return this;
  }
  distanceToPoint(point) {
    return this.normal.dot(point) + this.constant;
  }
  distanceToSphere(sphere) {
    return this.distanceToPoint(sphere.center) - sphere.radius;
  }
  projectPoint(point, target) {
    return target.copy(this.normal).multiplyScalar(-this.distanceToPoint(point)).add(point);
  }
  intersectLine(line, target) {
    const direction = line.delta(_vector1);
    const denominator = this.normal.dot(direction);
    if (denominator === 0) {
      if (this.distanceToPoint(line.start) === 0) {
        return target.copy(line.start);
      }
      return null;
    }
    const t = -(line.start.dot(this.normal) + this.constant) / denominator;
    if (t < 0 || t > 1) {
      return null;
    }
    return target.copy(direction).multiplyScalar(t).add(line.start);
  }
  intersectsLine(line) {
    const startSign = this.distanceToPoint(line.start);
    const endSign = this.distanceToPoint(line.end);
    return startSign < 0 && endSign > 0 || endSign < 0 && startSign > 0;
  }
  intersectsBox(box) {
    return box.intersectsPlane(this);
  }
  intersectsSphere(sphere) {
    return sphere.intersectsPlane(this);
  }
  coplanarPoint(target) {
    return target.copy(this.normal).multiplyScalar(-this.constant);
  }
  applyMatrix4(matrix, optionalNormalMatrix) {
    const normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix(matrix);
    const referencePoint = this.coplanarPoint(_vector1).applyMatrix4(matrix);
    const normal = this.normal.applyMatrix3(normalMatrix).normalize();
    this.constant = -referencePoint.dot(normal);
    return this;
  }
  translate(offset) {
    this.constant -= offset.dot(this.normal);
    return this;
  }
  equals(plane) {
    return plane.normal.equals(this.normal) && plane.constant === this.constant;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
Plane$1.prototype.isPlane = true;
const _sphere$2 = /* @__PURE__ */ new Sphere();
const _vector$7 = /* @__PURE__ */ new Vector3$1();
class Frustum {
  constructor(p0 = new Plane$1(), p1 = new Plane$1(), p2 = new Plane$1(), p3 = new Plane$1(), p4 = new Plane$1(), p5 = new Plane$1()) {
    this.planes = [p0, p1, p2, p3, p4, p5];
  }
  set(p0, p1, p2, p3, p4, p5) {
    const planes = this.planes;
    planes[0].copy(p0);
    planes[1].copy(p1);
    planes[2].copy(p2);
    planes[3].copy(p3);
    planes[4].copy(p4);
    planes[5].copy(p5);
    return this;
  }
  copy(frustum) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      planes[i].copy(frustum.planes[i]);
    }
    return this;
  }
  setFromProjectionMatrix(m) {
    const planes = this.planes;
    const me = m.elements;
    const me0 = me[0], me1 = me[1], me2 = me[2], me3 = me[3];
    const me4 = me[4], me5 = me[5], me6 = me[6], me7 = me[7];
    const me8 = me[8], me9 = me[9], me10 = me[10], me11 = me[11];
    const me12 = me[12], me13 = me[13], me14 = me[14], me15 = me[15];
    planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();
    planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();
    planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();
    planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();
    planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();
    planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();
    return this;
  }
  intersectsObject(object) {
    const geometry = object.geometry;
    if (geometry.boundingSphere === null)
      geometry.computeBoundingSphere();
    _sphere$2.copy(geometry.boundingSphere).applyMatrix4(object.matrixWorld);
    return this.intersectsSphere(_sphere$2);
  }
  intersectsSprite(sprite) {
    _sphere$2.center.set(0, 0, 0);
    _sphere$2.radius = 0.7071067811865476;
    _sphere$2.applyMatrix4(sprite.matrixWorld);
    return this.intersectsSphere(_sphere$2);
  }
  intersectsSphere(sphere) {
    const planes = this.planes;
    const center = sphere.center;
    const negRadius = -sphere.radius;
    for (let i = 0; i < 6; i++) {
      const distance = planes[i].distanceToPoint(center);
      if (distance < negRadius) {
        return false;
      }
    }
    return true;
  }
  intersectsBox(box) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      const plane = planes[i];
      _vector$7.x = plane.normal.x > 0 ? box.max.x : box.min.x;
      _vector$7.y = plane.normal.y > 0 ? box.max.y : box.min.y;
      _vector$7.z = plane.normal.z > 0 ? box.max.z : box.min.z;
      if (plane.distanceToPoint(_vector$7) < 0) {
        return false;
      }
    }
    return true;
  }
  containsPoint(point) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      if (planes[i].distanceToPoint(point) < 0) {
        return false;
      }
    }
    return true;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
function WebGLAnimation() {
  let context = null;
  let isAnimating = false;
  let animationLoop = null;
  let requestId = null;
  function onAnimationFrame(time, frame) {
    animationLoop(time, frame);
    requestId = context.requestAnimationFrame(onAnimationFrame);
  }
  return {
    start: function() {
      if (isAnimating === true)
        return;
      if (animationLoop === null)
        return;
      requestId = context.requestAnimationFrame(onAnimationFrame);
      isAnimating = true;
    },
    stop: function() {
      context.cancelAnimationFrame(requestId);
      isAnimating = false;
    },
    setAnimationLoop: function(callback) {
      animationLoop = callback;
    },
    setContext: function(value) {
      context = value;
    }
  };
}
function WebGLAttributes(gl, capabilities) {
  const isWebGL2 = capabilities.isWebGL2;
  const buffers = new WeakMap();
  function createBuffer(attribute, bufferType) {
    const array = attribute.array;
    const usage = attribute.usage;
    const buffer = gl.createBuffer();
    gl.bindBuffer(bufferType, buffer);
    gl.bufferData(bufferType, array, usage);
    attribute.onUploadCallback();
    let type = 5126;
    if (array instanceof Float32Array) {
      type = 5126;
    } else if (array instanceof Float64Array) {
      console.warn("THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.");
    } else if (array instanceof Uint16Array) {
      if (attribute.isFloat16BufferAttribute) {
        if (isWebGL2) {
          type = 5131;
        } else {
          console.warn("THREE.WebGLAttributes: Usage of Float16BufferAttribute requires WebGL2.");
        }
      } else {
        type = 5123;
      }
    } else if (array instanceof Int16Array) {
      type = 5122;
    } else if (array instanceof Uint32Array) {
      type = 5125;
    } else if (array instanceof Int32Array) {
      type = 5124;
    } else if (array instanceof Int8Array) {
      type = 5120;
    } else if (array instanceof Uint8Array) {
      type = 5121;
    } else if (array instanceof Uint8ClampedArray) {
      type = 5121;
    }
    return {
      buffer,
      type,
      bytesPerElement: array.BYTES_PER_ELEMENT,
      version: attribute.version
    };
  }
  function updateBuffer(buffer, attribute, bufferType) {
    const array = attribute.array;
    const updateRange = attribute.updateRange;
    gl.bindBuffer(bufferType, buffer);
    if (updateRange.count === -1) {
      gl.bufferSubData(bufferType, 0, array);
    } else {
      if (isWebGL2) {
        gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array, updateRange.offset, updateRange.count);
      } else {
        gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array.subarray(updateRange.offset, updateRange.offset + updateRange.count));
      }
      updateRange.count = -1;
    }
  }
  function get(attribute) {
    if (attribute.isInterleavedBufferAttribute)
      attribute = attribute.data;
    return buffers.get(attribute);
  }
  function remove(attribute) {
    if (attribute.isInterleavedBufferAttribute)
      attribute = attribute.data;
    const data = buffers.get(attribute);
    if (data) {
      gl.deleteBuffer(data.buffer);
      buffers.delete(attribute);
    }
  }
  function update(attribute, bufferType) {
    if (attribute.isGLBufferAttribute) {
      const cached = buffers.get(attribute);
      if (!cached || cached.version < attribute.version) {
        buffers.set(attribute, {
          buffer: attribute.buffer,
          type: attribute.type,
          bytesPerElement: attribute.elementSize,
          version: attribute.version
        });
      }
      return;
    }
    if (attribute.isInterleavedBufferAttribute)
      attribute = attribute.data;
    const data = buffers.get(attribute);
    if (data === void 0) {
      buffers.set(attribute, createBuffer(attribute, bufferType));
    } else if (data.version < attribute.version) {
      updateBuffer(data.buffer, attribute, bufferType);
      data.version = attribute.version;
    }
  }
  return {
    get,
    remove,
    update
  };
}
class PlaneGeometry extends BufferGeometry {
  constructor(width = 1, height = 1, widthSegments = 1, heightSegments = 1) {
    super();
    this.type = "PlaneGeometry";
    this.parameters = {
      width,
      height,
      widthSegments,
      heightSegments
    };
    const width_half = width / 2;
    const height_half = height / 2;
    const gridX = Math.floor(widthSegments);
    const gridY = Math.floor(heightSegments);
    const gridX1 = gridX + 1;
    const gridY1 = gridY + 1;
    const segment_width = width / gridX;
    const segment_height = height / gridY;
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    for (let iy = 0; iy < gridY1; iy++) {
      const y = iy * segment_height - height_half;
      for (let ix = 0; ix < gridX1; ix++) {
        const x = ix * segment_width - width_half;
        vertices.push(x, -y, 0);
        normals.push(0, 0, 1);
        uvs.push(ix / gridX);
        uvs.push(1 - iy / gridY);
      }
    }
    for (let iy = 0; iy < gridY; iy++) {
      for (let ix = 0; ix < gridX; ix++) {
        const a = ix + gridX1 * iy;
        const b = ix + gridX1 * (iy + 1);
        const c = ix + 1 + gridX1 * (iy + 1);
        const d = ix + 1 + gridX1 * iy;
        indices.push(a, b, d);
        indices.push(b, c, d);
      }
    }
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
  }
  static fromJSON(data) {
    return new PlaneGeometry(data.width, data.height, data.widthSegments, data.heightSegments);
  }
}
var alphamap_fragment = "#ifdef USE_ALPHAMAP\n	diffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif";
var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n	uniform sampler2D alphaMap;\n#endif";
var alphatest_fragment = "#ifdef USE_ALPHATEST\n	if ( diffuseColor.a < alphaTest ) discard;\n#endif";
var alphatest_pars_fragment = "#ifdef USE_ALPHATEST\n	uniform float alphaTest;\n#endif";
var aomap_fragment = "#ifdef USE_AOMAP\n	float ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n	reflectedLight.indirectDiffuse *= ambientOcclusion;\n	#if defined( USE_ENVMAP ) && defined( STANDARD )\n		float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n		reflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.roughness );\n	#endif\n#endif";
var aomap_pars_fragment = "#ifdef USE_AOMAP\n	uniform sampler2D aoMap;\n	uniform float aoMapIntensity;\n#endif";
var begin_vertex = "vec3 transformed = vec3( position );";
var beginnormal_vertex = "vec3 objectNormal = vec3( normal );\n#ifdef USE_TANGENT\n	vec3 objectTangent = vec3( tangent.xyz );\n#endif";
var bsdfs = "vec3 BRDF_Lambert( const in vec3 diffuseColor ) {\n	return RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 f0, const in float f90, const in float dotVH ) {\n	float fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );\n	return f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );\n}\nfloat V_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n	float a2 = pow2( alpha );\n	float gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n	float gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n	return 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n	float a2 = pow2( alpha );\n	float denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n	return RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_GGX( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 f0, const in float f90, const in float roughness ) {\n	float alpha = pow2( roughness );\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNL = saturate( dot( normal, lightDir ) );\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float dotVH = saturate( dot( viewDir, halfDir ) );\n	vec3 F = F_Schlick( f0, f90, dotVH );\n	float V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n	float D = D_GGX( alpha, dotNH );\n	return F * ( V * D );\n}\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n	const float LUT_SIZE = 64.0;\n	const float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n	const float LUT_BIAS = 0.5 / LUT_SIZE;\n	float dotNV = saturate( dot( N, V ) );\n	vec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n	uv = uv * LUT_SCALE + LUT_BIAS;\n	return uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n	float l = length( f );\n	return max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n	float x = dot( v1, v2 );\n	float y = abs( x );\n	float a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n	float b = 3.4175940 + ( 4.1616724 + y ) * y;\n	float v = a / b;\n	float theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n	return cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n	vec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n	vec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n	vec3 lightNormal = cross( v1, v2 );\n	if( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n	vec3 T1, T2;\n	T1 = normalize( V - N * dot( V, N ) );\n	T2 = - cross( N, T1 );\n	mat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n	vec3 coords[ 4 ];\n	coords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n	coords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n	coords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n	coords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n	coords[ 0 ] = normalize( coords[ 0 ] );\n	coords[ 1 ] = normalize( coords[ 1 ] );\n	coords[ 2 ] = normalize( coords[ 2 ] );\n	coords[ 3 ] = normalize( coords[ 3 ] );\n	vec3 vectorFormFactor = vec3( 0.0 );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n	float result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n	return vec3( result );\n}\nfloat G_BlinnPhong_Implicit( ) {\n	return 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n	return RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_BlinnPhong( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float shininess ) {\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float dotVH = saturate( dot( viewDir, halfDir ) );\n	vec3 F = F_Schlick( specularColor, 1.0, dotVH );\n	float G = G_BlinnPhong_Implicit( );\n	float D = D_BlinnPhong( shininess, dotNH );\n	return F * ( G * D );\n}\n#if defined( USE_SHEEN )\nfloat D_Charlie( float roughness, float dotNH ) {\n	float alpha = pow2( roughness );\n	float invAlpha = 1.0 / alpha;\n	float cos2h = dotNH * dotNH;\n	float sin2h = max( 1.0 - cos2h, 0.0078125 );\n	return ( 2.0 + invAlpha ) * pow( sin2h, invAlpha * 0.5 ) / ( 2.0 * PI );\n}\nfloat V_Neubelt( float dotNV, float dotNL ) {\n	return saturate( 1.0 / ( 4.0 * ( dotNL + dotNV - dotNL * dotNV ) ) );\n}\nvec3 BRDF_Sheen( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, vec3 sheenColor, const in float sheenRoughness ) {\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNL = saturate( dot( normal, lightDir ) );\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float D = D_Charlie( sheenRoughness, dotNH );\n	float V = V_Neubelt( dotNV, dotNL );\n	return sheenColor * ( D * V );\n}\n#endif";
var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n	uniform sampler2D bumpMap;\n	uniform float bumpScale;\n	vec2 dHdxy_fwd() {\n		vec2 dSTdx = dFdx( vUv );\n		vec2 dSTdy = dFdy( vUv );\n		float Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n		float dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n		float dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n		return vec2( dBx, dBy );\n	}\n	vec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy, float faceDirection ) {\n		vec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\n		vec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\n		vec3 vN = surf_norm;\n		vec3 R1 = cross( vSigmaY, vN );\n		vec3 R2 = cross( vN, vSigmaX );\n		float fDet = dot( vSigmaX, R1 ) * faceDirection;\n		vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n		return normalize( abs( fDet ) * surf_norm - vGrad );\n	}\n#endif";
var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n	vec4 plane;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n		plane = clippingPlanes[ i ];\n		if ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\n	}\n	#pragma unroll_loop_end\n	#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n		bool clipped = true;\n		#pragma unroll_loop_start\n		for ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n			plane = clippingPlanes[ i ];\n			clipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\n		}\n		#pragma unroll_loop_end\n		if ( clipped ) discard;\n	#endif\n#endif";
var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n	varying vec3 vClipPosition;\n	uniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif";
var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0\n	varying vec3 vClipPosition;\n#endif";
var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0\n	vClipPosition = - mvPosition.xyz;\n#endif";
var color_fragment = "#if defined( USE_COLOR_ALPHA )\n	diffuseColor *= vColor;\n#elif defined( USE_COLOR )\n	diffuseColor.rgb *= vColor;\n#endif";
var color_pars_fragment = "#if defined( USE_COLOR_ALPHA )\n	varying vec4 vColor;\n#elif defined( USE_COLOR )\n	varying vec3 vColor;\n#endif";
var color_pars_vertex = "#if defined( USE_COLOR_ALPHA )\n	varying vec4 vColor;\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n	varying vec3 vColor;\n#endif";
var color_vertex = "#if defined( USE_COLOR_ALPHA )\n	vColor = vec4( 1.0 );\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n	vColor = vec3( 1.0 );\n#endif\n#ifdef USE_COLOR\n	vColor *= color;\n#endif\n#ifdef USE_INSTANCING_COLOR\n	vColor.xyz *= instanceColor.xyz;\n#endif";
var common = "#define PI 3.141592653589793\n#define PI2 6.283185307179586\n#define PI_HALF 1.5707963267948966\n#define RECIPROCAL_PI 0.3183098861837907\n#define RECIPROCAL_PI2 0.15915494309189535\n#define EPSILON 1e-6\n#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\n#define whiteComplement( a ) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat max3( const in vec3 v ) { return max( max( v.x, v.y ), v.z ); }\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\nhighp float rand( const in vec2 uv ) {\n	const highp float a = 12.9898, b = 78.233, c = 43758.5453;\n	highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n	return fract( sin( sn ) * c );\n}\n#ifdef HIGH_PRECISION\n	float precisionSafeLength( vec3 v ) { return length( v ); }\n#else\n	float precisionSafeLength( vec3 v ) {\n		float maxComponent = max3( abs( v ) );\n		return length( v / maxComponent ) * maxComponent;\n	}\n#endif\nstruct IncidentLight {\n	vec3 color;\n	vec3 direction;\n	bool visible;\n};\nstruct ReflectedLight {\n	vec3 directDiffuse;\n	vec3 directSpecular;\n	vec3 indirectDiffuse;\n	vec3 indirectSpecular;\n};\nstruct GeometricContext {\n	vec3 position;\n	vec3 normal;\n	vec3 viewDir;\n#ifdef USE_CLEARCOAT\n	vec3 clearcoatNormal;\n#endif\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n	return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n	return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nmat3 transposeMat3( const in mat3 m ) {\n	mat3 tmp;\n	tmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n	tmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n	tmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n	return tmp;\n}\nfloat linearToRelativeLuminance( const in vec3 color ) {\n	vec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\n	return dot( weights, color.rgb );\n}\nbool isPerspectiveMatrix( mat4 m ) {\n	return m[ 2 ][ 3 ] == - 1.0;\n}\nvec2 equirectUv( in vec3 dir ) {\n	float u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\n	float v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n	return vec2( u, v );\n}";
var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n	#define cubeUV_maxMipLevel 8.0\n	#define cubeUV_minMipLevel 4.0\n	#define cubeUV_maxTileSize 256.0\n	#define cubeUV_minTileSize 16.0\n	float getFace( vec3 direction ) {\n		vec3 absDirection = abs( direction );\n		float face = - 1.0;\n		if ( absDirection.x > absDirection.z ) {\n			if ( absDirection.x > absDirection.y )\n				face = direction.x > 0.0 ? 0.0 : 3.0;\n			else\n				face = direction.y > 0.0 ? 1.0 : 4.0;\n		} else {\n			if ( absDirection.z > absDirection.y )\n				face = direction.z > 0.0 ? 2.0 : 5.0;\n			else\n				face = direction.y > 0.0 ? 1.0 : 4.0;\n		}\n		return face;\n	}\n	vec2 getUV( vec3 direction, float face ) {\n		vec2 uv;\n		if ( face == 0.0 ) {\n			uv = vec2( direction.z, direction.y ) / abs( direction.x );\n		} else if ( face == 1.0 ) {\n			uv = vec2( - direction.x, - direction.z ) / abs( direction.y );\n		} else if ( face == 2.0 ) {\n			uv = vec2( - direction.x, direction.y ) / abs( direction.z );\n		} else if ( face == 3.0 ) {\n			uv = vec2( - direction.z, direction.y ) / abs( direction.x );\n		} else if ( face == 4.0 ) {\n			uv = vec2( - direction.x, direction.z ) / abs( direction.y );\n		} else {\n			uv = vec2( direction.x, direction.y ) / abs( direction.z );\n		}\n		return 0.5 * ( uv + 1.0 );\n	}\n	vec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\n		float face = getFace( direction );\n		float filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\n		mipInt = max( mipInt, cubeUV_minMipLevel );\n		float faceSize = exp2( mipInt );\n		float texelSize = 1.0 / ( 3.0 * cubeUV_maxTileSize );\n		vec2 uv = getUV( direction, face ) * ( faceSize - 1.0 ) + 0.5;\n		if ( face > 2.0 ) {\n			uv.y += faceSize;\n			face -= 3.0;\n		}\n		uv.x += face * faceSize;\n		if ( mipInt < cubeUV_maxMipLevel ) {\n			uv.y += 2.0 * cubeUV_maxTileSize;\n		}\n		uv.y += filterInt * 2.0 * cubeUV_minTileSize;\n		uv.x += 3.0 * max( 0.0, cubeUV_maxTileSize - 2.0 * faceSize );\n		uv *= texelSize;\n		return texture2D( envMap, uv ).rgb;\n	}\n	#define r0 1.0\n	#define v0 0.339\n	#define m0 - 2.0\n	#define r1 0.8\n	#define v1 0.276\n	#define m1 - 1.0\n	#define r4 0.4\n	#define v4 0.046\n	#define m4 2.0\n	#define r5 0.305\n	#define v5 0.016\n	#define m5 3.0\n	#define r6 0.21\n	#define v6 0.0038\n	#define m6 4.0\n	float roughnessToMip( float roughness ) {\n		float mip = 0.0;\n		if ( roughness >= r1 ) {\n			mip = ( r0 - roughness ) * ( m1 - m0 ) / ( r0 - r1 ) + m0;\n		} else if ( roughness >= r4 ) {\n			mip = ( r1 - roughness ) * ( m4 - m1 ) / ( r1 - r4 ) + m1;\n		} else if ( roughness >= r5 ) {\n			mip = ( r4 - roughness ) * ( m5 - m4 ) / ( r4 - r5 ) + m4;\n		} else if ( roughness >= r6 ) {\n			mip = ( r5 - roughness ) * ( m6 - m5 ) / ( r5 - r6 ) + m5;\n		} else {\n			mip = - 2.0 * log2( 1.16 * roughness );		}\n		return mip;\n	}\n	vec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\n		float mip = clamp( roughnessToMip( roughness ), m0, cubeUV_maxMipLevel );\n		float mipF = fract( mip );\n		float mipInt = floor( mip );\n		vec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\n		if ( mipF == 0.0 ) {\n			return vec4( color0, 1.0 );\n		} else {\n			vec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\n			return vec4( mix( color0, color1, mipF ), 1.0 );\n		}\n	}\n#endif";
var defaultnormal_vertex = "vec3 transformedNormal = objectNormal;\n#ifdef USE_INSTANCING\n	mat3 m = mat3( instanceMatrix );\n	transformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\n	transformedNormal = m * transformedNormal;\n#endif\ntransformedNormal = normalMatrix * transformedNormal;\n#ifdef FLIP_SIDED\n	transformedNormal = - transformedNormal;\n#endif\n#ifdef USE_TANGENT\n	vec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n	#ifdef FLIP_SIDED\n		transformedTangent = - transformedTangent;\n	#endif\n#endif";
var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n	uniform sampler2D displacementMap;\n	uniform float displacementScale;\n	uniform float displacementBias;\n#endif";
var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n	transformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\n#endif";
var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n	vec4 emissiveColor = texture2D( emissiveMap, vUv );\n	totalEmissiveRadiance *= emissiveColor.rgb;\n#endif";
var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n	uniform sampler2D emissiveMap;\n#endif";
var encodings_fragment = "gl_FragColor = linearToOutputTexel( gl_FragColor );";
var encodings_pars_fragment = "vec4 LinearToLinear( in vec4 value ) {\n	return value;\n}\nvec4 LinearTosRGB( in vec4 value ) {\n	return vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\n}";
var envmap_fragment = "#ifdef USE_ENVMAP\n	#ifdef ENV_WORLDPOS\n		vec3 cameraToFrag;\n		if ( isOrthographic ) {\n			cameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n		} else {\n			cameraToFrag = normalize( vWorldPosition - cameraPosition );\n		}\n		vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n		#ifdef ENVMAP_MODE_REFLECTION\n			vec3 reflectVec = reflect( cameraToFrag, worldNormal );\n		#else\n			vec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\n		#endif\n	#else\n		vec3 reflectVec = vReflect;\n	#endif\n	#ifdef ENVMAP_TYPE_CUBE\n		vec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n	#elif defined( ENVMAP_TYPE_CUBE_UV )\n		vec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\n	#else\n		vec4 envColor = vec4( 0.0 );\n	#endif\n	#ifdef ENVMAP_BLENDING_MULTIPLY\n		outgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n	#elif defined( ENVMAP_BLENDING_MIX )\n		outgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n	#elif defined( ENVMAP_BLENDING_ADD )\n		outgoingLight += envColor.xyz * specularStrength * reflectivity;\n	#endif\n#endif";
var envmap_common_pars_fragment = "#ifdef USE_ENVMAP\n	uniform float envMapIntensity;\n	uniform float flipEnvMap;\n	#ifdef ENVMAP_TYPE_CUBE\n		uniform samplerCube envMap;\n	#else\n		uniform sampler2D envMap;\n	#endif\n	\n#endif";
var envmap_pars_fragment = "#ifdef USE_ENVMAP\n	uniform float reflectivity;\n	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n		#define ENV_WORLDPOS\n	#endif\n	#ifdef ENV_WORLDPOS\n		varying vec3 vWorldPosition;\n		uniform float refractionRatio;\n	#else\n		varying vec3 vReflect;\n	#endif\n#endif";
var envmap_pars_vertex = "#ifdef USE_ENVMAP\n	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\n		#define ENV_WORLDPOS\n	#endif\n	#ifdef ENV_WORLDPOS\n		\n		varying vec3 vWorldPosition;\n	#else\n		varying vec3 vReflect;\n		uniform float refractionRatio;\n	#endif\n#endif";
var envmap_vertex = "#ifdef USE_ENVMAP\n	#ifdef ENV_WORLDPOS\n		vWorldPosition = worldPosition.xyz;\n	#else\n		vec3 cameraToVertex;\n		if ( isOrthographic ) {\n			cameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n		} else {\n			cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n		}\n		vec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n		#ifdef ENVMAP_MODE_REFLECTION\n			vReflect = reflect( cameraToVertex, worldNormal );\n		#else\n			vReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n		#endif\n	#endif\n#endif";
var fog_vertex = "#ifdef USE_FOG\n	vFogDepth = - mvPosition.z;\n#endif";
var fog_pars_vertex = "#ifdef USE_FOG\n	varying float vFogDepth;\n#endif";
var fog_fragment = "#ifdef USE_FOG\n	#ifdef FOG_EXP2\n		float fogFactor = 1.0 - exp( - fogDensity * fogDensity * vFogDepth * vFogDepth );\n	#else\n		float fogFactor = smoothstep( fogNear, fogFar, vFogDepth );\n	#endif\n	gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif";
var fog_pars_fragment = "#ifdef USE_FOG\n	uniform vec3 fogColor;\n	varying float vFogDepth;\n	#ifdef FOG_EXP2\n		uniform float fogDensity;\n	#else\n		uniform float fogNear;\n		uniform float fogFar;\n	#endif\n#endif";
var gradientmap_pars_fragment = "#ifdef USE_GRADIENTMAP\n	uniform sampler2D gradientMap;\n#endif\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n	float dotNL = dot( normal, lightDirection );\n	vec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n	#ifdef USE_GRADIENTMAP\n		return vec3( texture2D( gradientMap, coord ).r );\n	#else\n		return ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\n	#endif\n}";
var lightmap_fragment = "#ifdef USE_LIGHTMAP\n	vec4 lightMapTexel = texture2D( lightMap, vUv2 );\n	vec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;\n	#ifndef PHYSICALLY_CORRECT_LIGHTS\n		lightMapIrradiance *= PI;\n	#endif\n	reflectedLight.indirectDiffuse += lightMapIrradiance;\n#endif";
var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n	uniform sampler2D lightMap;\n	uniform float lightMapIntensity;\n#endif";
var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\nvIndirectFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n	vLightBack = vec3( 0.0 );\n	vIndirectBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\nvIndirectFront += getAmbientLightIrradiance( ambientLightColor );\nvIndirectFront += getLightProbeIrradiance( lightProbe, geometry.normal );\n#ifdef DOUBLE_SIDED\n	vIndirectBack += getAmbientLightIrradiance( ambientLightColor );\n	vIndirectBack += getLightProbeIrradiance( lightProbe, backGeometry.normal );\n#endif\n#if NUM_POINT_LIGHTS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n		getPointLightInfo( pointLights[ i ], geometry, directLight );\n		dotNL = dot( geometry.normal, directLight.direction );\n		directLightColor_Diffuse = directLight.color;\n		vLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n		#ifdef DOUBLE_SIDED\n			vLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n		#endif\n	}\n	#pragma unroll_loop_end\n#endif\n#if NUM_SPOT_LIGHTS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n		getSpotLightInfo( spotLights[ i ], geometry, directLight );\n		dotNL = dot( geometry.normal, directLight.direction );\n		directLightColor_Diffuse = directLight.color;\n		vLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n		#ifdef DOUBLE_SIDED\n			vLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n		#endif\n	}\n	#pragma unroll_loop_end\n#endif\n#if NUM_DIR_LIGHTS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n		getDirectionalLightInfo( directionalLights[ i ], geometry, directLight );\n		dotNL = dot( geometry.normal, directLight.direction );\n		directLightColor_Diffuse = directLight.color;\n		vLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n		#ifdef DOUBLE_SIDED\n			vLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n		#endif\n	}\n	#pragma unroll_loop_end\n#endif\n#if NUM_HEMI_LIGHTS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n		vIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry.normal );\n		#ifdef DOUBLE_SIDED\n			vIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry.normal );\n		#endif\n	}\n	#pragma unroll_loop_end\n#endif";
var lights_pars_begin = "uniform bool receiveShadow;\nuniform vec3 ambientLightColor;\nuniform vec3 lightProbe[ 9 ];\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\n	float x = normal.x, y = normal.y, z = normal.z;\n	vec3 result = shCoefficients[ 0 ] * 0.886227;\n	result += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\n	result += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\n	result += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\n	result += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\n	result += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\n	result += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\n	result += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\n	result += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\n	return result;\n}\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in vec3 normal ) {\n	vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n	vec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\n	return irradiance;\n}\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n	vec3 irradiance = ambientLightColor;\n	return irradiance;\n}\nfloat getDistanceAttenuation( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n	#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n		float distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n		if ( cutoffDistance > 0.0 ) {\n			distanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n		}\n		return distanceFalloff;\n	#else\n		if ( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\n			return pow( saturate( - lightDistance / cutoffDistance + 1.0 ), decayExponent );\n		}\n		return 1.0;\n	#endif\n}\nfloat getSpotAttenuation( const in float coneCosine, const in float penumbraCosine, const in float angleCosine ) {\n	return smoothstep( coneCosine, penumbraCosine, angleCosine );\n}\n#if NUM_DIR_LIGHTS > 0\n	struct DirectionalLight {\n		vec3 direction;\n		vec3 color;\n	};\n	uniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n	void getDirectionalLightInfo( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight light ) {\n		light.color = directionalLight.color;\n		light.direction = directionalLight.direction;\n		light.visible = true;\n	}\n#endif\n#if NUM_POINT_LIGHTS > 0\n	struct PointLight {\n		vec3 position;\n		vec3 color;\n		float distance;\n		float decay;\n	};\n	uniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n	void getPointLightInfo( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight light ) {\n		vec3 lVector = pointLight.position - geometry.position;\n		light.direction = normalize( lVector );\n		float lightDistance = length( lVector );\n		light.color = pointLight.color;\n		light.color *= getDistanceAttenuation( lightDistance, pointLight.distance, pointLight.decay );\n		light.visible = ( light.color != vec3( 0.0 ) );\n	}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n	struct SpotLight {\n		vec3 position;\n		vec3 direction;\n		vec3 color;\n		float distance;\n		float decay;\n		float coneCos;\n		float penumbraCos;\n	};\n	uniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n	void getSpotLightInfo( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight light ) {\n		vec3 lVector = spotLight.position - geometry.position;\n		light.direction = normalize( lVector );\n		float angleCos = dot( light.direction, spotLight.direction );\n		float spotAttenuation = getSpotAttenuation( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n		if ( spotAttenuation > 0.0 ) {\n			float lightDistance = length( lVector );\n			light.color = spotLight.color * spotAttenuation;\n			light.color *= getDistanceAttenuation( lightDistance, spotLight.distance, spotLight.decay );\n			light.visible = ( light.color != vec3( 0.0 ) );\n		} else {\n			light.color = vec3( 0.0 );\n			light.visible = false;\n		}\n	}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n	struct RectAreaLight {\n		vec3 color;\n		vec3 position;\n		vec3 halfWidth;\n		vec3 halfHeight;\n	};\n	uniform sampler2D ltc_1;	uniform sampler2D ltc_2;\n	uniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n	struct HemisphereLight {\n		vec3 direction;\n		vec3 skyColor;\n		vec3 groundColor;\n	};\n	uniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n	vec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in vec3 normal ) {\n		float dotNL = dot( normal, hemiLight.direction );\n		float hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n		vec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n		return irradiance;\n	}\n#endif";
var envmap_physical_pars_fragment = "#if defined( USE_ENVMAP )\n	#ifdef ENVMAP_MODE_REFRACTION\n		uniform float refractionRatio;\n	#endif\n	vec3 getIBLIrradiance( const in vec3 normal ) {\n		#if defined( ENVMAP_TYPE_CUBE_UV )\n			vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n			vec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\n			return PI * envMapColor.rgb * envMapIntensity;\n		#else\n			return vec3( 0.0 );\n		#endif\n	}\n	vec3 getIBLRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness ) {\n		#if defined( ENVMAP_TYPE_CUBE_UV )\n			vec3 reflectVec;\n			#ifdef ENVMAP_MODE_REFLECTION\n				reflectVec = reflect( - viewDir, normal );\n				reflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\n			#else\n				reflectVec = refract( - viewDir, normal, refractionRatio );\n			#endif\n			reflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n			vec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\n			return envMapColor.rgb * envMapIntensity;\n		#else\n			return vec3( 0.0 );\n		#endif\n	}\n#endif";
var lights_toon_fragment = "ToonMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;";
var lights_toon_pars_fragment = "varying vec3 vViewPosition;\nstruct ToonMaterial {\n	vec3 diffuseColor;\n};\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n	vec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct				RE_Direct_Toon\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_Toon\n#define Material_LightProbeLOD( material )	(0)";
var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;";
var lights_phong_pars_fragment = "varying vec3 vViewPosition;\nstruct BlinnPhongMaterial {\n	vec3 diffuseColor;\n	vec3 specularColor;\n	float specularShininess;\n	float specularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n	float dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n	vec3 irradiance = dotNL * directLight.color;\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n	reflectedLight.directSpecular += irradiance * BRDF_BlinnPhong( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct				RE_Direct_BlinnPhong\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )	(0)";
var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\nmaterial.roughness = max( roughnessFactor, 0.0525 );material.roughness += geometryRoughness;\nmaterial.roughness = min( material.roughness, 1.0 );\n#ifdef IOR\n	#ifdef SPECULAR\n		float specularIntensityFactor = specularIntensity;\n		vec3 specularColorFactor = specularColor;\n		#ifdef USE_SPECULARINTENSITYMAP\n			specularIntensityFactor *= texture2D( specularIntensityMap, vUv ).a;\n		#endif\n		#ifdef USE_SPECULARCOLORMAP\n			specularColorFactor *= texture2D( specularColorMap, vUv ).rgb;\n		#endif\n		material.specularF90 = mix( specularIntensityFactor, 1.0, metalnessFactor );\n	#else\n		float specularIntensityFactor = 1.0;\n		vec3 specularColorFactor = vec3( 1.0 );\n		material.specularF90 = 1.0;\n	#endif\n	material.specularColor = mix( min( pow2( ( ior - 1.0 ) / ( ior + 1.0 ) ) * specularColorFactor, vec3( 1.0 ) ) * specularIntensityFactor, diffuseColor.rgb, metalnessFactor );\n#else\n	material.specularColor = mix( vec3( 0.04 ), diffuseColor.rgb, metalnessFactor );\n	material.specularF90 = 1.0;\n#endif\n#ifdef USE_CLEARCOAT\n	material.clearcoat = clearcoat;\n	material.clearcoatRoughness = clearcoatRoughness;\n	material.clearcoatF0 = vec3( 0.04 );\n	material.clearcoatF90 = 1.0;\n	#ifdef USE_CLEARCOATMAP\n		material.clearcoat *= texture2D( clearcoatMap, vUv ).x;\n	#endif\n	#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n		material.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;\n	#endif\n	material.clearcoat = saturate( material.clearcoat );	material.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\n	material.clearcoatRoughness += geometryRoughness;\n	material.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\n#endif\n#ifdef USE_SHEEN\n	material.sheenColor = sheenColor;\n	#ifdef USE_SHEENCOLORMAP\n		material.sheenColor *= texture2D( sheenColorMap, vUv ).rgb;\n	#endif\n	material.sheenRoughness = clamp( sheenRoughness, 0.07, 1.0 );\n	#ifdef USE_SHEENROUGHNESSMAP\n		material.sheenRoughness *= texture2D( sheenRoughnessMap, vUv ).a;\n	#endif\n#endif";
var lights_physical_pars_fragment = "struct PhysicalMaterial {\n	vec3 diffuseColor;\n	float roughness;\n	vec3 specularColor;\n	float specularF90;\n	#ifdef USE_CLEARCOAT\n		float clearcoat;\n		float clearcoatRoughness;\n		vec3 clearcoatF0;\n		float clearcoatF90;\n	#endif\n	#ifdef USE_SHEEN\n		vec3 sheenColor;\n		float sheenRoughness;\n	#endif\n};\nvec3 clearcoatSpecular = vec3( 0.0 );\nvec3 sheenSpecular = vec3( 0.0 );\nfloat IBLSheenBRDF( const in vec3 normal, const in vec3 viewDir, const in float roughness) {\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float r2 = roughness * roughness;\n	float a = roughness < 0.25 ? -339.2 * r2 + 161.4 * roughness - 25.9 : -8.48 * r2 + 14.3 * roughness - 9.95;\n	float b = roughness < 0.25 ? 44.0 * r2 - 23.7 * roughness + 3.26 : 1.97 * r2 - 3.27 * roughness + 0.72;\n	float DG = exp( a * dotNV + b ) + ( roughness < 0.25 ? 0.0 : 0.1 * ( roughness - 0.25 ) );\n	return saturate( DG * RECIPROCAL_PI );\n}\nvec2 DFGApprox( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {\n	float dotNV = saturate( dot( normal, viewDir ) );\n	const vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n	const vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n	vec4 r = roughness * c0 + c1;\n	float a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n	vec2 fab = vec2( - 1.04, 1.04 ) * a004 + r.zw;\n	return fab;\n}\nvec3 EnvironmentBRDF( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness ) {\n	vec2 fab = DFGApprox( normal, viewDir, roughness );\n	return specularColor * fab.x + specularF90 * fab.y;\n}\nvoid computeMultiscattering( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n	vec2 fab = DFGApprox( normal, viewDir, roughness );\n	vec3 FssEss = specularColor * fab.x + specularF90 * fab.y;\n	float Ess = fab.x + fab.y;\n	float Ems = 1.0 - Ess;\n	vec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619;	vec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\n	singleScatter += FssEss;\n	multiScatter += Fms * Ems;\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n	void RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n		vec3 normal = geometry.normal;\n		vec3 viewDir = geometry.viewDir;\n		vec3 position = geometry.position;\n		vec3 lightPos = rectAreaLight.position;\n		vec3 halfWidth = rectAreaLight.halfWidth;\n		vec3 halfHeight = rectAreaLight.halfHeight;\n		vec3 lightColor = rectAreaLight.color;\n		float roughness = material.roughness;\n		vec3 rectCoords[ 4 ];\n		rectCoords[ 0 ] = lightPos + halfWidth - halfHeight;		rectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\n		rectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\n		rectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\n		vec2 uv = LTC_Uv( normal, viewDir, roughness );\n		vec4 t1 = texture2D( ltc_1, uv );\n		vec4 t2 = texture2D( ltc_2, uv );\n		mat3 mInv = mat3(\n			vec3( t1.x, 0, t1.y ),\n			vec3(    0, 1,    0 ),\n			vec3( t1.z, 0, t1.w )\n		);\n		vec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n		reflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n		reflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n	}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n	float dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n	vec3 irradiance = dotNL * directLight.color;\n	#ifdef USE_CLEARCOAT\n		float dotNLcc = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\n		vec3 ccIrradiance = dotNLcc * directLight.color;\n		clearcoatSpecular += ccIrradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.clearcoatNormal, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );\n	#endif\n	#ifdef USE_SHEEN\n		sheenSpecular += irradiance * BRDF_Sheen( directLight.direction, geometry.viewDir, geometry.normal, material.sheenColor, material.sheenRoughness );\n	#endif\n	reflectedLight.directSpecular += irradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularF90, material.roughness );\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\n	#ifdef USE_CLEARCOAT\n		clearcoatSpecular += clearcoatRadiance * EnvironmentBRDF( geometry.clearcoatNormal, geometry.viewDir, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );\n	#endif\n	#ifdef USE_SHEEN\n		sheenSpecular += irradiance * material.sheenColor * IBLSheenBRDF( geometry.normal, geometry.viewDir, material.sheenRoughness );\n	#endif\n	vec3 singleScattering = vec3( 0.0 );\n	vec3 multiScattering = vec3( 0.0 );\n	vec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\n	computeMultiscattering( geometry.normal, geometry.viewDir, material.specularColor, material.specularF90, material.roughness, singleScattering, multiScattering );\n	vec3 diffuse = material.diffuseColor * ( 1.0 - ( singleScattering + multiScattering ) );\n	reflectedLight.indirectSpecular += radiance * singleScattering;\n	reflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\n	reflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\n}\n#define RE_Direct				RE_Direct_Physical\n#define RE_Direct_RectArea		RE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular		RE_IndirectSpecular_Physical\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n	return saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}";
var lights_fragment_begin = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\n#ifdef USE_CLEARCOAT\n	geometry.clearcoatNormal = clearcoatNormal;\n#endif\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n	PointLight pointLight;\n	#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\n	PointLightShadow pointLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n		pointLight = pointLights[ i ];\n		getPointLightInfo( pointLight, geometry, directLight );\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\n		pointLightShadow = pointLightShadows[ i ];\n		directLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometry, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n	SpotLight spotLight;\n	#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\n	SpotLightShadow spotLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n		spotLight = spotLights[ i ];\n		getSpotLightInfo( spotLight, geometry, directLight );\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n		spotLightShadow = spotLightShadows[ i ];\n		directLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometry, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n	DirectionalLight directionalLight;\n	#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\n	DirectionalLightShadow directionalLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n		directionalLight = directionalLights[ i ];\n		getDirectionalLightInfo( directionalLight, geometry, directLight );\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\n		directionalLightShadow = directionalLightShadows[ i ];\n		directLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometry, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n	RectAreaLight rectAreaLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n		rectAreaLight = rectAreaLights[ i ];\n		RE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if defined( RE_IndirectDiffuse )\n	vec3 iblIrradiance = vec3( 0.0 );\n	vec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n	irradiance += getLightProbeIrradiance( lightProbe, geometry.normal );\n	#if ( NUM_HEMI_LIGHTS > 0 )\n		#pragma unroll_loop_start\n		for ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n			irradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry.normal );\n		}\n		#pragma unroll_loop_end\n	#endif\n#endif\n#if defined( RE_IndirectSpecular )\n	vec3 radiance = vec3( 0.0 );\n	vec3 clearcoatRadiance = vec3( 0.0 );\n#endif";
var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n	#ifdef USE_LIGHTMAP\n		vec4 lightMapTexel = texture2D( lightMap, vUv2 );\n		vec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;\n		#ifndef PHYSICALLY_CORRECT_LIGHTS\n			lightMapIrradiance *= PI;\n		#endif\n		irradiance += lightMapIrradiance;\n	#endif\n	#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\n		iblIrradiance += getIBLIrradiance( geometry.normal );\n	#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n	radiance += getIBLRadiance( geometry.viewDir, geometry.normal, material.roughness );\n	#ifdef USE_CLEARCOAT\n		clearcoatRadiance += getIBLRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness );\n	#endif\n#endif";
var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n	RE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n	RE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\n#endif";
var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n	gl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";
var logdepthbuf_pars_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n	uniform float logDepthBufFC;\n	varying float vFragDepth;\n	varying float vIsPerspective;\n#endif";
var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n	#ifdef USE_LOGDEPTHBUF_EXT\n		varying float vFragDepth;\n		varying float vIsPerspective;\n	#else\n		uniform float logDepthBufFC;\n	#endif\n#endif";
var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n	#ifdef USE_LOGDEPTHBUF_EXT\n		vFragDepth = 1.0 + gl_Position.w;\n		vIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\n	#else\n		if ( isPerspectiveMatrix( projectionMatrix ) ) {\n			gl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\n			gl_Position.z *= gl_Position.w;\n		}\n	#endif\n#endif";
var map_fragment = "#ifdef USE_MAP\n	vec4 sampledDiffuseColor = texture2D( map, vUv );\n	#ifdef DECODE_VIDEO_TEXTURE\n		sampledDiffuseColor = vec4( mix( pow( sampledDiffuseColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), sampledDiffuseColor.rgb * 0.0773993808, vec3( lessThanEqual( sampledDiffuseColor.rgb, vec3( 0.04045 ) ) ) ), sampledDiffuseColor.w );\n	#endif\n	diffuseColor *= sampledDiffuseColor;\n#endif";
var map_pars_fragment = "#ifdef USE_MAP\n	uniform sampler2D map;\n#endif";
var map_particle_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n	vec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n#endif\n#ifdef USE_MAP\n	diffuseColor *= texture2D( map, uv );\n#endif\n#ifdef USE_ALPHAMAP\n	diffuseColor.a *= texture2D( alphaMap, uv ).g;\n#endif";
var map_particle_pars_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n	uniform mat3 uvTransform;\n#endif\n#ifdef USE_MAP\n	uniform sampler2D map;\n#endif\n#ifdef USE_ALPHAMAP\n	uniform sampler2D alphaMap;\n#endif";
var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n	vec4 texelMetalness = texture2D( metalnessMap, vUv );\n	metalnessFactor *= texelMetalness.b;\n#endif";
var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n	uniform sampler2D metalnessMap;\n#endif";
var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n	objectNormal *= morphTargetBaseInfluence;\n	#ifdef MORPHTARGETS_TEXTURE\n		for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n			if ( morphTargetInfluences[ i ] != 0.0 ) objectNormal += getMorph( gl_VertexID, i, 1, 2 ) * morphTargetInfluences[ i ];\n		}\n	#else\n		objectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\n		objectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\n		objectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\n		objectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\n	#endif\n#endif";
var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n	uniform float morphTargetBaseInfluence;\n	#ifdef MORPHTARGETS_TEXTURE\n		uniform float morphTargetInfluences[ MORPHTARGETS_COUNT ];\n		uniform sampler2DArray morphTargetsTexture;\n		uniform vec2 morphTargetsTextureSize;\n		vec3 getMorph( const in int vertexIndex, const in int morphTargetIndex, const in int offset, const in int stride ) {\n			float texelIndex = float( vertexIndex * stride + offset );\n			float y = floor( texelIndex / morphTargetsTextureSize.x );\n			float x = texelIndex - y * morphTargetsTextureSize.x;\n			vec3 morphUV = vec3( ( x + 0.5 ) / morphTargetsTextureSize.x, y / morphTargetsTextureSize.y, morphTargetIndex );\n			return texture( morphTargetsTexture, morphUV ).xyz;\n		}\n	#else\n		#ifndef USE_MORPHNORMALS\n			uniform float morphTargetInfluences[ 8 ];\n		#else\n			uniform float morphTargetInfluences[ 4 ];\n		#endif\n	#endif\n#endif";
var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n	transformed *= morphTargetBaseInfluence;\n	#ifdef MORPHTARGETS_TEXTURE\n		for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n			#ifndef USE_MORPHNORMALS\n				if ( morphTargetInfluences[ i ] != 0.0 ) transformed += getMorph( gl_VertexID, i, 0, 1 ) * morphTargetInfluences[ i ];\n			#else\n				if ( morphTargetInfluences[ i ] != 0.0 ) transformed += getMorph( gl_VertexID, i, 0, 2 ) * morphTargetInfluences[ i ];\n			#endif\n		}\n	#else\n		transformed += morphTarget0 * morphTargetInfluences[ 0 ];\n		transformed += morphTarget1 * morphTargetInfluences[ 1 ];\n		transformed += morphTarget2 * morphTargetInfluences[ 2 ];\n		transformed += morphTarget3 * morphTargetInfluences[ 3 ];\n		#ifndef USE_MORPHNORMALS\n			transformed += morphTarget4 * morphTargetInfluences[ 4 ];\n			transformed += morphTarget5 * morphTargetInfluences[ 5 ];\n			transformed += morphTarget6 * morphTargetInfluences[ 6 ];\n			transformed += morphTarget7 * morphTargetInfluences[ 7 ];\n		#endif\n	#endif\n#endif";
var normal_fragment_begin = "float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;\n#ifdef FLAT_SHADED\n	vec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n	vec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n	vec3 normal = normalize( cross( fdx, fdy ) );\n#else\n	vec3 normal = normalize( vNormal );\n	#ifdef DOUBLE_SIDED\n		normal = normal * faceDirection;\n	#endif\n	#ifdef USE_TANGENT\n		vec3 tangent = normalize( vTangent );\n		vec3 bitangent = normalize( vBitangent );\n		#ifdef DOUBLE_SIDED\n			tangent = tangent * faceDirection;\n			bitangent = bitangent * faceDirection;\n		#endif\n		#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\n			mat3 vTBN = mat3( tangent, bitangent, normal );\n		#endif\n	#endif\n#endif\nvec3 geometryNormal = normal;";
var normal_fragment_maps = "#ifdef OBJECTSPACE_NORMALMAP\n	normal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n	#ifdef FLIP_SIDED\n		normal = - normal;\n	#endif\n	#ifdef DOUBLE_SIDED\n		normal = normal * faceDirection;\n	#endif\n	normal = normalize( normalMatrix * normal );\n#elif defined( TANGENTSPACE_NORMALMAP )\n	vec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n	mapN.xy *= normalScale;\n	#ifdef USE_TANGENT\n		normal = normalize( vTBN * mapN );\n	#else\n		normal = perturbNormal2Arb( - vViewPosition, normal, mapN, faceDirection );\n	#endif\n#elif defined( USE_BUMPMAP )\n	normal = perturbNormalArb( - vViewPosition, normal, dHdxy_fwd(), faceDirection );\n#endif";
var normal_pars_fragment = "#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n	#ifdef USE_TANGENT\n		varying vec3 vTangent;\n		varying vec3 vBitangent;\n	#endif\n#endif";
var normal_pars_vertex = "#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n	#ifdef USE_TANGENT\n		varying vec3 vTangent;\n		varying vec3 vBitangent;\n	#endif\n#endif";
var normal_vertex = "#ifndef FLAT_SHADED\n	vNormal = normalize( transformedNormal );\n	#ifdef USE_TANGENT\n		vTangent = normalize( transformedTangent );\n		vBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n	#endif\n#endif";
var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n	uniform sampler2D normalMap;\n	uniform vec2 normalScale;\n#endif\n#ifdef OBJECTSPACE_NORMALMAP\n	uniform mat3 normalMatrix;\n#endif\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\n	vec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN, float faceDirection ) {\n		vec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\n		vec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\n		vec2 st0 = dFdx( vUv.st );\n		vec2 st1 = dFdy( vUv.st );\n		vec3 N = surf_norm;\n		vec3 q1perp = cross( q1, N );\n		vec3 q0perp = cross( N, q0 );\n		vec3 T = q1perp * st0.x + q0perp * st1.x;\n		vec3 B = q1perp * st0.y + q0perp * st1.y;\n		float det = max( dot( T, T ), dot( B, B ) );\n		float scale = ( det == 0.0 ) ? 0.0 : faceDirection * inversesqrt( det );\n		return normalize( T * ( mapN.x * scale ) + B * ( mapN.y * scale ) + N * mapN.z );\n	}\n#endif";
var clearcoat_normal_fragment_begin = "#ifdef USE_CLEARCOAT\n	vec3 clearcoatNormal = geometryNormal;\n#endif";
var clearcoat_normal_fragment_maps = "#ifdef USE_CLEARCOAT_NORMALMAP\n	vec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\n	clearcoatMapN.xy *= clearcoatNormalScale;\n	#ifdef USE_TANGENT\n		clearcoatNormal = normalize( vTBN * clearcoatMapN );\n	#else\n		clearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN, faceDirection );\n	#endif\n#endif";
var clearcoat_pars_fragment = "#ifdef USE_CLEARCOATMAP\n	uniform sampler2D clearcoatMap;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n	uniform sampler2D clearcoatRoughnessMap;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	uniform sampler2D clearcoatNormalMap;\n	uniform vec2 clearcoatNormalScale;\n#endif";
var output_fragment = "#ifdef OPAQUE\ndiffuseColor.a = 1.0;\n#endif\n#ifdef USE_TRANSMISSION\ndiffuseColor.a *= transmissionAlpha + 0.1;\n#endif\ngl_FragColor = vec4( outgoingLight, diffuseColor.a );";
var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n	return normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n	return 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n	vec4 r = vec4( fract( v * PackFactors ), v );\n	r.yzw -= r.xyz * ShiftRight8;	return r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n	return dot( v, UnpackFactors );\n}\nvec4 pack2HalfToRGBA( vec2 v ) {\n	vec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ) );\n	return vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w );\n}\nvec2 unpackRGBATo2Half( vec4 v ) {\n	return vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n	return ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n	return linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n	return ( ( near + viewZ ) * far ) / ( ( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n	return ( near * far ) / ( ( far - near ) * invClipZ - far );\n}";
var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n	gl_FragColor.rgb *= gl_FragColor.a;\n#endif";
var project_vertex = "vec4 mvPosition = vec4( transformed, 1.0 );\n#ifdef USE_INSTANCING\n	mvPosition = instanceMatrix * mvPosition;\n#endif\nmvPosition = modelViewMatrix * mvPosition;\ngl_Position = projectionMatrix * mvPosition;";
var dithering_fragment = "#ifdef DITHERING\n	gl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif";
var dithering_pars_fragment = "#ifdef DITHERING\n	vec3 dithering( vec3 color ) {\n		float grid_position = rand( gl_FragCoord.xy );\n		vec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n		dither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n		return color + dither_shift_RGB;\n	}\n#endif";
var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n	vec4 texelRoughness = texture2D( roughnessMap, vUv );\n	roughnessFactor *= texelRoughness.g;\n#endif";
var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n	uniform sampler2D roughnessMap;\n#endif";
var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n		uniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\n		varying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n		struct DirectionalLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n		uniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\n		varying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n		struct SpotLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n		uniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\n		varying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n		struct PointLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n			float shadowCameraNear;\n			float shadowCameraFar;\n		};\n		uniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n	#endif\n	float texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n		return step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n	}\n	vec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\n		return unpackRGBATo2Half( texture2D( shadow, uv ) );\n	}\n	float VSMShadow (sampler2D shadow, vec2 uv, float compare ){\n		float occlusion = 1.0;\n		vec2 distribution = texture2DDistribution( shadow, uv );\n		float hard_shadow = step( compare , distribution.x );\n		if (hard_shadow != 1.0 ) {\n			float distance = compare - distribution.x ;\n			float variance = max( 0.00000, distribution.y * distribution.y );\n			float softness_probability = variance / (variance + distance * distance );			softness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );			occlusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\n		}\n		return occlusion;\n	}\n	float getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n		float shadow = 1.0;\n		shadowCoord.xyz /= shadowCoord.w;\n		shadowCoord.z += shadowBias;\n		bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n		bool inFrustum = all( inFrustumVec );\n		bvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n		bool frustumTest = all( frustumTestVec );\n		if ( frustumTest ) {\n		#if defined( SHADOWMAP_TYPE_PCF )\n			vec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n			float dx0 = - texelSize.x * shadowRadius;\n			float dy0 = - texelSize.y * shadowRadius;\n			float dx1 = + texelSize.x * shadowRadius;\n			float dy1 = + texelSize.y * shadowRadius;\n			float dx2 = dx0 / 2.0;\n			float dy2 = dy0 / 2.0;\n			float dx3 = dx1 / 2.0;\n			float dy3 = dy1 / 2.0;\n			shadow = (\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n			) * ( 1.0 / 17.0 );\n		#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n			vec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n			float dx = texelSize.x;\n			float dy = texelSize.y;\n			vec2 uv = shadowCoord.xy;\n			vec2 f = fract( uv * shadowMapSize + 0.5 );\n			uv -= f * texelSize;\n			shadow = (\n				texture2DCompare( shadowMap, uv, shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \n					 texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\n					 f.x ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \n					 texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\n					 f.x ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \n					 texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\n					 f.y ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \n					 texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\n					 f.y ) +\n				mix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \n						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\n						  f.x ),\n					 mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \n						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\n						  f.x ),\n					 f.y )\n			) * ( 1.0 / 9.0 );\n		#elif defined( SHADOWMAP_TYPE_VSM )\n			shadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\n		#else\n			shadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n		#endif\n		}\n		return shadow;\n	}\n	vec2 cubeToUV( vec3 v, float texelSizeY ) {\n		vec3 absV = abs( v );\n		float scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n		absV *= scaleToCube;\n		v *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n		vec2 planar = v.xy;\n		float almostATexel = 1.5 * texelSizeY;\n		float almostOne = 1.0 - almostATexel;\n		if ( absV.z >= almostOne ) {\n			if ( v.z > 0.0 )\n				planar.x = 4.0 - v.x;\n		} else if ( absV.x >= almostOne ) {\n			float signX = sign( v.x );\n			planar.x = v.z * signX + 2.0 * signX;\n		} else if ( absV.y >= almostOne ) {\n			float signY = sign( v.y );\n			planar.x = v.x + 2.0 * signY + 2.0;\n			planar.y = v.z * signY - 2.0;\n		}\n		return vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n	}\n	float getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n		vec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n		vec3 lightToPosition = shadowCoord.xyz;\n		float dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );		dp += shadowBias;\n		vec3 bd3D = normalize( lightToPosition );\n		#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\n			vec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n			return (\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n				texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n			) * ( 1.0 / 9.0 );\n		#else\n			return texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n		#endif\n	}\n#endif";
var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n		uniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\n		varying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n		struct DirectionalLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n		uniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\n		varying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n		struct SpotLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n		uniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\n		varying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n		struct PointLightShadow {\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n			float shadowCameraNear;\n			float shadowCameraFar;\n		};\n		uniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n	#endif\n#endif";
var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0 || NUM_SPOT_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0\n		vec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n		vec4 shadowWorldPosition;\n	#endif\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n		shadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\n		vDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n		shadowWorldPosition = worldPosition + vec4( shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias, 0 );\n		vSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * shadowWorldPosition;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n		shadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\n		vPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\n	}\n	#pragma unroll_loop_end\n	#endif\n#endif";
var shadowmask_pars_fragment = "float getShadowMask() {\n	float shadow = 1.0;\n	#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n	DirectionalLightShadow directionalLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n		directionalLight = directionalLightShadows[ i ];\n		shadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n	SpotLightShadow spotLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n		spotLight = spotLightShadows[ i ];\n		shadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n	PointLightShadow pointLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n		pointLight = pointLightShadows[ i ];\n		shadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#endif\n	return shadow;\n}";
var skinbase_vertex = "#ifdef USE_SKINNING\n	mat4 boneMatX = getBoneMatrix( skinIndex.x );\n	mat4 boneMatY = getBoneMatrix( skinIndex.y );\n	mat4 boneMatZ = getBoneMatrix( skinIndex.z );\n	mat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";
var skinning_pars_vertex = "#ifdef USE_SKINNING\n	uniform mat4 bindMatrix;\n	uniform mat4 bindMatrixInverse;\n	#ifdef BONE_TEXTURE\n		uniform highp sampler2D boneTexture;\n		uniform int boneTextureSize;\n		mat4 getBoneMatrix( const in float i ) {\n			float j = i * 4.0;\n			float x = mod( j, float( boneTextureSize ) );\n			float y = floor( j / float( boneTextureSize ) );\n			float dx = 1.0 / float( boneTextureSize );\n			float dy = 1.0 / float( boneTextureSize );\n			y = dy * ( y + 0.5 );\n			vec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n			vec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n			vec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n			vec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n			mat4 bone = mat4( v1, v2, v3, v4 );\n			return bone;\n		}\n	#else\n		uniform mat4 boneMatrices[ MAX_BONES ];\n		mat4 getBoneMatrix( const in float i ) {\n			mat4 bone = boneMatrices[ int(i) ];\n			return bone;\n		}\n	#endif\n#endif";
var skinning_vertex = "#ifdef USE_SKINNING\n	vec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n	vec4 skinned = vec4( 0.0 );\n	skinned += boneMatX * skinVertex * skinWeight.x;\n	skinned += boneMatY * skinVertex * skinWeight.y;\n	skinned += boneMatZ * skinVertex * skinWeight.z;\n	skinned += boneMatW * skinVertex * skinWeight.w;\n	transformed = ( bindMatrixInverse * skinned ).xyz;\n#endif";
var skinnormal_vertex = "#ifdef USE_SKINNING\n	mat4 skinMatrix = mat4( 0.0 );\n	skinMatrix += skinWeight.x * boneMatX;\n	skinMatrix += skinWeight.y * boneMatY;\n	skinMatrix += skinWeight.z * boneMatZ;\n	skinMatrix += skinWeight.w * boneMatW;\n	skinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\n	objectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n	#ifdef USE_TANGENT\n		objectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n	#endif\n#endif";
var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n	vec4 texelSpecular = texture2D( specularMap, vUv );\n	specularStrength = texelSpecular.r;\n#else\n	specularStrength = 1.0;\n#endif";
var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n	uniform sampler2D specularMap;\n#endif";
var tonemapping_fragment = "#if defined( TONE_MAPPING )\n	gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif";
var tonemapping_pars_fragment = "#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nvec3 LinearToneMapping( vec3 color ) {\n	return toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n	color *= toneMappingExposure;\n	return saturate( color / ( vec3( 1.0 ) + color ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n	color *= toneMappingExposure;\n	color = max( vec3( 0.0 ), color - 0.004 );\n	return pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\nvec3 RRTAndODTFit( vec3 v ) {\n	vec3 a = v * ( v + 0.0245786 ) - 0.000090537;\n	vec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\n	return a / b;\n}\nvec3 ACESFilmicToneMapping( vec3 color ) {\n	const mat3 ACESInputMat = mat3(\n		vec3( 0.59719, 0.07600, 0.02840 ),		vec3( 0.35458, 0.90834, 0.13383 ),\n		vec3( 0.04823, 0.01566, 0.83777 )\n	);\n	const mat3 ACESOutputMat = mat3(\n		vec3(  1.60475, -0.10208, -0.00327 ),		vec3( -0.53108,  1.10813, -0.07276 ),\n		vec3( -0.07367, -0.00605,  1.07602 )\n	);\n	color *= toneMappingExposure / 0.6;\n	color = ACESInputMat * color;\n	color = RRTAndODTFit( color );\n	color = ACESOutputMat * color;\n	return saturate( color );\n}\nvec3 CustomToneMapping( vec3 color ) { return color; }";
var transmission_fragment = "#ifdef USE_TRANSMISSION\n	float transmissionAlpha = 1.0;\n	float transmissionFactor = transmission;\n	float thicknessFactor = thickness;\n	#ifdef USE_TRANSMISSIONMAP\n		transmissionFactor *= texture2D( transmissionMap, vUv ).r;\n	#endif\n	#ifdef USE_THICKNESSMAP\n		thicknessFactor *= texture2D( thicknessMap, vUv ).g;\n	#endif\n	vec3 pos = vWorldPosition;\n	vec3 v = normalize( cameraPosition - pos );\n	vec3 n = inverseTransformDirection( normal, viewMatrix );\n	vec4 transmission = getIBLVolumeRefraction(\n		n, v, roughnessFactor, material.diffuseColor, material.specularColor, material.specularF90,\n		pos, modelMatrix, viewMatrix, projectionMatrix, ior, thicknessFactor,\n		attenuationColor, attenuationDistance );\n	totalDiffuse = mix( totalDiffuse, transmission.rgb, transmissionFactor );\n	transmissionAlpha = mix( transmissionAlpha, transmission.a, transmissionFactor );\n#endif";
var transmission_pars_fragment = "#ifdef USE_TRANSMISSION\n	uniform float transmission;\n	uniform float thickness;\n	uniform float attenuationDistance;\n	uniform vec3 attenuationColor;\n	#ifdef USE_TRANSMISSIONMAP\n		uniform sampler2D transmissionMap;\n	#endif\n	#ifdef USE_THICKNESSMAP\n		uniform sampler2D thicknessMap;\n	#endif\n	uniform vec2 transmissionSamplerSize;\n	uniform sampler2D transmissionSamplerMap;\n	uniform mat4 modelMatrix;\n	uniform mat4 projectionMatrix;\n	varying vec3 vWorldPosition;\n	vec3 getVolumeTransmissionRay( const in vec3 n, const in vec3 v, const in float thickness, const in float ior, const in mat4 modelMatrix ) {\n		vec3 refractionVector = refract( - v, normalize( n ), 1.0 / ior );\n		vec3 modelScale;\n		modelScale.x = length( vec3( modelMatrix[ 0 ].xyz ) );\n		modelScale.y = length( vec3( modelMatrix[ 1 ].xyz ) );\n		modelScale.z = length( vec3( modelMatrix[ 2 ].xyz ) );\n		return normalize( refractionVector ) * thickness * modelScale;\n	}\n	float applyIorToRoughness( const in float roughness, const in float ior ) {\n		return roughness * clamp( ior * 2.0 - 2.0, 0.0, 1.0 );\n	}\n	vec4 getTransmissionSample( const in vec2 fragCoord, const in float roughness, const in float ior ) {\n		float framebufferLod = log2( transmissionSamplerSize.x ) * applyIorToRoughness( roughness, ior );\n		#ifdef TEXTURE_LOD_EXT\n			return texture2DLodEXT( transmissionSamplerMap, fragCoord.xy, framebufferLod );\n		#else\n			return texture2D( transmissionSamplerMap, fragCoord.xy, framebufferLod );\n		#endif\n	}\n	vec3 applyVolumeAttenuation( const in vec3 radiance, const in float transmissionDistance, const in vec3 attenuationColor, const in float attenuationDistance ) {\n		if ( attenuationDistance == 0.0 ) {\n			return radiance;\n		} else {\n			vec3 attenuationCoefficient = -log( attenuationColor ) / attenuationDistance;\n			vec3 transmittance = exp( - attenuationCoefficient * transmissionDistance );			return transmittance * radiance;\n		}\n	}\n	vec4 getIBLVolumeRefraction( const in vec3 n, const in vec3 v, const in float roughness, const in vec3 diffuseColor,\n		const in vec3 specularColor, const in float specularF90, const in vec3 position, const in mat4 modelMatrix,\n		const in mat4 viewMatrix, const in mat4 projMatrix, const in float ior, const in float thickness,\n		const in vec3 attenuationColor, const in float attenuationDistance ) {\n		vec3 transmissionRay = getVolumeTransmissionRay( n, v, thickness, ior, modelMatrix );\n		vec3 refractedRayExit = position + transmissionRay;\n		vec4 ndcPos = projMatrix * viewMatrix * vec4( refractedRayExit, 1.0 );\n		vec2 refractionCoords = ndcPos.xy / ndcPos.w;\n		refractionCoords += 1.0;\n		refractionCoords /= 2.0;\n		vec4 transmittedLight = getTransmissionSample( refractionCoords, roughness, ior );\n		vec3 attenuatedColor = applyVolumeAttenuation( transmittedLight.rgb, length( transmissionRay ), attenuationColor, attenuationDistance );\n		vec3 F = EnvironmentBRDF( n, v, specularColor, specularF90, roughness );\n		return vec4( ( 1.0 - F ) * attenuatedColor * diffuseColor, transmittedLight.a );\n	}\n#endif";
var uv_pars_fragment = "#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\n	varying vec2 vUv;\n#endif";
var uv_pars_vertex = "#ifdef USE_UV\n	#ifdef UVS_VERTEX_ONLY\n		vec2 vUv;\n	#else\n		varying vec2 vUv;\n	#endif\n	uniform mat3 uvTransform;\n#endif";
var uv_vertex = "#ifdef USE_UV\n	vUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n#endif";
var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n	varying vec2 vUv2;\n#endif";
var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n	attribute vec2 uv2;\n	varying vec2 vUv2;\n	uniform mat3 uv2Transform;\n#endif";
var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n	vUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\n#endif";
var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP ) || defined ( USE_TRANSMISSION )\n	vec4 worldPosition = vec4( transformed, 1.0 );\n	#ifdef USE_INSTANCING\n		worldPosition = instanceMatrix * worldPosition;\n	#endif\n	worldPosition = modelMatrix * worldPosition;\n#endif";
const vertex$g = "varying vec2 vUv;\nuniform mat3 uvTransform;\nvoid main() {\n	vUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n	gl_Position = vec4( position.xy, 1.0, 1.0 );\n}";
const fragment$g = "uniform sampler2D t2D;\nvarying vec2 vUv;\nvoid main() {\n	gl_FragColor = texture2D( t2D, vUv );\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n}";
const vertex$f = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vWorldDirection = transformDirection( position, modelMatrix );\n	#include <begin_vertex>\n	#include <project_vertex>\n	gl_Position.z = gl_Position.w;\n}";
const fragment$f = "#include <envmap_common_pars_fragment>\nuniform float opacity;\nvarying vec3 vWorldDirection;\n#include <cube_uv_reflection_fragment>\nvoid main() {\n	vec3 vReflect = vWorldDirection;\n	#include <envmap_fragment>\n	gl_FragColor = envColor;\n	gl_FragColor.a *= opacity;\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n}";
const vertex$e = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n	#include <uv_vertex>\n	#include <skinbase_vertex>\n	#ifdef USE_DISPLACEMENTMAP\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vHighPrecisionZW = gl_Position.zw;\n}";
const fragment$e = "#if DEPTH_PACKING == 3200\n	uniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( 1.0 );\n	#if DEPTH_PACKING == 3200\n		diffuseColor.a = opacity;\n	#endif\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <logdepthbuf_fragment>\n	float fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\n	#if DEPTH_PACKING == 3200\n		gl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\n	#elif DEPTH_PACKING == 3201\n		gl_FragColor = packDepthToRGBA( fragCoordZ );\n	#endif\n}";
const vertex$d = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <skinbase_vertex>\n	#ifdef USE_DISPLACEMENTMAP\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <worldpos_vertex>\n	#include <clipping_planes_vertex>\n	vWorldPosition = worldPosition.xyz;\n}";
const fragment$d = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( 1.0 );\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	float dist = length( vWorldPosition - referencePosition );\n	dist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n	dist = saturate( dist );\n	gl_FragColor = packDepthToRGBA( dist );\n}";
const vertex$c = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vWorldDirection = transformDirection( position, modelMatrix );\n	#include <begin_vertex>\n	#include <project_vertex>\n}";
const fragment$c = "uniform sampler2D tEquirect;\nvarying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vec3 direction = normalize( vWorldDirection );\n	vec2 sampleUV = equirectUv( direction );\n	gl_FragColor = texture2D( tEquirect, sampleUV );\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n}";
const vertex$b = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	vLineDistance = scale * lineDistance;\n	#include <color_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n}";
const fragment$b = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	if ( mod( vLineDistance, totalSize ) > dashSize ) {\n		discard;\n	}\n	vec3 outgoingLight = vec3( 0.0 );\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <logdepthbuf_fragment>\n	#include <color_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n}";
const vertex$a = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <uv2_vertex>\n	#include <color_vertex>\n	#if defined ( USE_ENVMAP ) || defined ( USE_SKINNING )\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinbase_vertex>\n		#include <skinnormal_vertex>\n		#include <defaultnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$a = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <specularmap_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	#ifdef USE_LIGHTMAP\n		vec4 lightMapTexel= texture2D( lightMap, vUv2 );\n		reflectedLight.indirectDiffuse += lightMapTexel.rgb * lightMapIntensity;\n	#else\n		reflectedLight.indirectDiffuse += vec3( 1.0 );\n	#endif\n	#include <aomap_fragment>\n	reflectedLight.indirectDiffuse *= diffuseColor.rgb;\n	vec3 outgoingLight = reflectedLight.indirectDiffuse;\n	#include <envmap_fragment>\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$9 = "#define LAMBERT\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n	varying vec3 vLightBack;\n	varying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <uv2_vertex>\n	#include <color_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <lights_lambert_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$9 = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n	varying vec3 vLightBack;\n	varying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <specularmap_fragment>\n	#include <emissivemap_fragment>\n	#ifdef DOUBLE_SIDED\n		reflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\n	#else\n		reflectedLight.indirectDiffuse += vIndirectFront;\n	#endif\n	#include <lightmap_fragment>\n	reflectedLight.indirectDiffuse *= BRDF_Lambert( diffuseColor.rgb );\n	#ifdef DOUBLE_SIDED\n		reflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n	#else\n		reflectedLight.directDiffuse = vLightFront;\n	#endif\n	reflectedLight.directDiffuse *= BRDF_Lambert( diffuseColor.rgb ) * getShadowMask();\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n	#include <envmap_fragment>\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$8 = "#define MATCAP\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n	vViewPosition = - mvPosition.xyz;\n}";
const fragment$8 = "#define MATCAP\nuniform vec3 diffuse;\nuniform float opacity;\nuniform sampler2D matcap;\nvarying vec3 vViewPosition;\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	vec3 viewDir = normalize( vViewPosition );\n	vec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\n	vec3 y = cross( viewDir, x );\n	vec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\n	#ifdef USE_MATCAP\n		vec4 matcapColor = texture2D( matcap, uv );\n	#else\n		vec4 matcapColor = vec4( vec3( mix( 0.2, 0.8, uv.y ) ), 1.0 );\n	#endif\n	vec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$7 = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n	varying vec3 vViewPosition;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n	vViewPosition = - mvPosition.xyz;\n#endif\n}";
const fragment$7 = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n	varying vec3 vViewPosition;\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	#include <logdepthbuf_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	gl_FragColor = vec4( packNormalToRGB( normal ), opacity );\n}";
const vertex$6 = "#define PHONG\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <uv2_vertex>\n	#include <color_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$6 = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <specularmap_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_phong_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n	#include <envmap_fragment>\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$5 = "#define STANDARD\nvarying vec3 vViewPosition;\n#ifdef USE_TRANSMISSION\n	varying vec3 vWorldPosition;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <uv2_vertex>\n	#include <color_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n#ifdef USE_TRANSMISSION\n	vWorldPosition = worldPosition.xyz;\n#endif\n}";
const fragment$5 = "#define STANDARD\n#ifdef PHYSICAL\n	#define IOR\n	#define SPECULAR\n#endif\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifdef IOR\n	uniform float ior;\n#endif\n#ifdef SPECULAR\n	uniform float specularIntensity;\n	uniform vec3 specularColor;\n	#ifdef USE_SPECULARINTENSITYMAP\n		uniform sampler2D specularIntensityMap;\n	#endif\n	#ifdef USE_SPECULARCOLORMAP\n		uniform sampler2D specularColorMap;\n	#endif\n#endif\n#ifdef USE_CLEARCOAT\n	uniform float clearcoat;\n	uniform float clearcoatRoughness;\n#endif\n#ifdef USE_SHEEN\n	uniform vec3 sheenColor;\n	uniform float sheenRoughness;\n	#ifdef USE_SHEENCOLORMAP\n		uniform sampler2D sheenColorMap;\n	#endif\n	#ifdef USE_SHEENROUGHNESSMAP\n		uniform sampler2D sheenRoughnessMap;\n	#endif\n#endif\nvarying vec3 vViewPosition;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <bsdfs>\n#include <cube_uv_reflection_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_physical_pars_fragment>\n#include <fog_pars_fragment>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_physical_pars_fragment>\n#include <transmission_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <clearcoat_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <roughnessmap_fragment>\n	#include <metalnessmap_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <clearcoat_normal_fragment_begin>\n	#include <clearcoat_normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_physical_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 totalDiffuse = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse;\n	vec3 totalSpecular = reflectedLight.directSpecular + reflectedLight.indirectSpecular;\n	#include <transmission_fragment>\n	vec3 outgoingLight = totalDiffuse + totalSpecular + totalEmissiveRadiance;\n	#ifdef USE_SHEEN\n		float sheenEnergyComp = 1.0 - 0.157 * max3( material.sheenColor );\n		outgoingLight = outgoingLight * sheenEnergyComp + sheenSpecular;\n	#endif\n	#ifdef USE_CLEARCOAT\n		float dotNVcc = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\n		vec3 Fcc = F_Schlick( material.clearcoatF0, material.clearcoatF90, dotNVcc );\n		outgoingLight = outgoingLight * ( 1.0 - material.clearcoat * Fcc ) + clearcoatSpecular * material.clearcoat;\n	#endif\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$4 = "#define TOON\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <uv2_vertex>\n	#include <color_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$4 = "#define TOON\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_toon_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_toon_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$3 = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <color_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <project_vertex>\n	gl_PointSize = size;\n	#ifdef USE_SIZEATTENUATION\n		bool isPerspective = isPerspectiveMatrix( projectionMatrix );\n		if ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\n	#endif\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <worldpos_vertex>\n	#include <fog_vertex>\n}";
const fragment$3 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec3 outgoingLight = vec3( 0.0 );\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <logdepthbuf_fragment>\n	#include <map_particle_fragment>\n	#include <color_fragment>\n	#include <alphatest_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n}";
const vertex$2 = "#include <common>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <project_vertex>\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$2 = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n	gl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n}";
const vertex$1 = "uniform float rotation;\nuniform vec2 center;\n#include <common>\n#include <uv_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	vec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\n	vec2 scale;\n	scale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\n	scale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\n	#ifndef USE_SIZEATTENUATION\n		bool isPerspective = isPerspectiveMatrix( projectionMatrix );\n		if ( isPerspective ) scale *= - mvPosition.z;\n	#endif\n	vec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\n	vec2 rotatedPosition;\n	rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\n	rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\n	mvPosition.xy += rotatedPosition;\n	gl_Position = projectionMatrix * mvPosition;\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n}";
const fragment$1 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	#include <clipping_planes_fragment>\n	vec3 outgoingLight = vec3( 0.0 );\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <output_fragment>\n	#include <tonemapping_fragment>\n	#include <encodings_fragment>\n	#include <fog_fragment>\n}";
const ShaderChunk = {
  alphamap_fragment,
  alphamap_pars_fragment,
  alphatest_fragment,
  alphatest_pars_fragment,
  aomap_fragment,
  aomap_pars_fragment,
  begin_vertex,
  beginnormal_vertex,
  bsdfs,
  bumpmap_pars_fragment,
  clipping_planes_fragment,
  clipping_planes_pars_fragment,
  clipping_planes_pars_vertex,
  clipping_planes_vertex,
  color_fragment,
  color_pars_fragment,
  color_pars_vertex,
  color_vertex,
  common,
  cube_uv_reflection_fragment,
  defaultnormal_vertex,
  displacementmap_pars_vertex,
  displacementmap_vertex,
  emissivemap_fragment,
  emissivemap_pars_fragment,
  encodings_fragment,
  encodings_pars_fragment,
  envmap_fragment,
  envmap_common_pars_fragment,
  envmap_pars_fragment,
  envmap_pars_vertex,
  envmap_physical_pars_fragment,
  envmap_vertex,
  fog_vertex,
  fog_pars_vertex,
  fog_fragment,
  fog_pars_fragment,
  gradientmap_pars_fragment,
  lightmap_fragment,
  lightmap_pars_fragment,
  lights_lambert_vertex,
  lights_pars_begin,
  lights_toon_fragment,
  lights_toon_pars_fragment,
  lights_phong_fragment,
  lights_phong_pars_fragment,
  lights_physical_fragment,
  lights_physical_pars_fragment,
  lights_fragment_begin,
  lights_fragment_maps,
  lights_fragment_end,
  logdepthbuf_fragment,
  logdepthbuf_pars_fragment,
  logdepthbuf_pars_vertex,
  logdepthbuf_vertex,
  map_fragment,
  map_pars_fragment,
  map_particle_fragment,
  map_particle_pars_fragment,
  metalnessmap_fragment,
  metalnessmap_pars_fragment,
  morphnormal_vertex,
  morphtarget_pars_vertex,
  morphtarget_vertex,
  normal_fragment_begin,
  normal_fragment_maps,
  normal_pars_fragment,
  normal_pars_vertex,
  normal_vertex,
  normalmap_pars_fragment,
  clearcoat_normal_fragment_begin,
  clearcoat_normal_fragment_maps,
  clearcoat_pars_fragment,
  output_fragment,
  packing,
  premultiplied_alpha_fragment,
  project_vertex,
  dithering_fragment,
  dithering_pars_fragment,
  roughnessmap_fragment,
  roughnessmap_pars_fragment,
  shadowmap_pars_fragment,
  shadowmap_pars_vertex,
  shadowmap_vertex,
  shadowmask_pars_fragment,
  skinbase_vertex,
  skinning_pars_vertex,
  skinning_vertex,
  skinnormal_vertex,
  specularmap_fragment,
  specularmap_pars_fragment,
  tonemapping_fragment,
  tonemapping_pars_fragment,
  transmission_fragment,
  transmission_pars_fragment,
  uv_pars_fragment,
  uv_pars_vertex,
  uv_vertex,
  uv2_pars_fragment,
  uv2_pars_vertex,
  uv2_vertex,
  worldpos_vertex,
  background_vert: vertex$g,
  background_frag: fragment$g,
  cube_vert: vertex$f,
  cube_frag: fragment$f,
  depth_vert: vertex$e,
  depth_frag: fragment$e,
  distanceRGBA_vert: vertex$d,
  distanceRGBA_frag: fragment$d,
  equirect_vert: vertex$c,
  equirect_frag: fragment$c,
  linedashed_vert: vertex$b,
  linedashed_frag: fragment$b,
  meshbasic_vert: vertex$a,
  meshbasic_frag: fragment$a,
  meshlambert_vert: vertex$9,
  meshlambert_frag: fragment$9,
  meshmatcap_vert: vertex$8,
  meshmatcap_frag: fragment$8,
  meshnormal_vert: vertex$7,
  meshnormal_frag: fragment$7,
  meshphong_vert: vertex$6,
  meshphong_frag: fragment$6,
  meshphysical_vert: vertex$5,
  meshphysical_frag: fragment$5,
  meshtoon_vert: vertex$4,
  meshtoon_frag: fragment$4,
  points_vert: vertex$3,
  points_frag: fragment$3,
  shadow_vert: vertex$2,
  shadow_frag: fragment$2,
  sprite_vert: vertex$1,
  sprite_frag: fragment$1
};
const UniformsLib = {
  common: {
    diffuse: {value: new Color(16777215)},
    opacity: {value: 1},
    map: {value: null},
    uvTransform: {value: new Matrix3$1()},
    uv2Transform: {value: new Matrix3$1()},
    alphaMap: {value: null},
    alphaTest: {value: 0}
  },
  specularmap: {
    specularMap: {value: null}
  },
  envmap: {
    envMap: {value: null},
    flipEnvMap: {value: -1},
    reflectivity: {value: 1},
    ior: {value: 1.5},
    refractionRatio: {value: 0.98}
  },
  aomap: {
    aoMap: {value: null},
    aoMapIntensity: {value: 1}
  },
  lightmap: {
    lightMap: {value: null},
    lightMapIntensity: {value: 1}
  },
  emissivemap: {
    emissiveMap: {value: null}
  },
  bumpmap: {
    bumpMap: {value: null},
    bumpScale: {value: 1}
  },
  normalmap: {
    normalMap: {value: null},
    normalScale: {value: new Vector2$1(1, 1)}
  },
  displacementmap: {
    displacementMap: {value: null},
    displacementScale: {value: 1},
    displacementBias: {value: 0}
  },
  roughnessmap: {
    roughnessMap: {value: null}
  },
  metalnessmap: {
    metalnessMap: {value: null}
  },
  gradientmap: {
    gradientMap: {value: null}
  },
  fog: {
    fogDensity: {value: 25e-5},
    fogNear: {value: 1},
    fogFar: {value: 2e3},
    fogColor: {value: new Color(16777215)}
  },
  lights: {
    ambientLightColor: {value: []},
    lightProbe: {value: []},
    directionalLights: {value: [], properties: {
      direction: {},
      color: {}
    }},
    directionalLightShadows: {value: [], properties: {
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {}
    }},
    directionalShadowMap: {value: []},
    directionalShadowMatrix: {value: []},
    spotLights: {value: [], properties: {
      color: {},
      position: {},
      direction: {},
      distance: {},
      coneCos: {},
      penumbraCos: {},
      decay: {}
    }},
    spotLightShadows: {value: [], properties: {
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {}
    }},
    spotShadowMap: {value: []},
    spotShadowMatrix: {value: []},
    pointLights: {value: [], properties: {
      color: {},
      position: {},
      decay: {},
      distance: {}
    }},
    pointLightShadows: {value: [], properties: {
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {},
      shadowCameraNear: {},
      shadowCameraFar: {}
    }},
    pointShadowMap: {value: []},
    pointShadowMatrix: {value: []},
    hemisphereLights: {value: [], properties: {
      direction: {},
      skyColor: {},
      groundColor: {}
    }},
    rectAreaLights: {value: [], properties: {
      color: {},
      position: {},
      width: {},
      height: {}
    }},
    ltc_1: {value: null},
    ltc_2: {value: null}
  },
  points: {
    diffuse: {value: new Color(16777215)},
    opacity: {value: 1},
    size: {value: 1},
    scale: {value: 1},
    map: {value: null},
    alphaMap: {value: null},
    alphaTest: {value: 0},
    uvTransform: {value: new Matrix3$1()}
  },
  sprite: {
    diffuse: {value: new Color(16777215)},
    opacity: {value: 1},
    center: {value: new Vector2$1(0.5, 0.5)},
    rotation: {value: 0},
    map: {value: null},
    alphaMap: {value: null},
    alphaTest: {value: 0},
    uvTransform: {value: new Matrix3$1()}
  }
};
const ShaderLib = {
  basic: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.meshbasic_vert,
    fragmentShader: ShaderChunk.meshbasic_frag
  },
  lambert: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: {value: new Color(0)}
      }
    ]),
    vertexShader: ShaderChunk.meshlambert_vert,
    fragmentShader: ShaderChunk.meshlambert_frag
  },
  phong: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: {value: new Color(0)},
        specular: {value: new Color(1118481)},
        shininess: {value: 30}
      }
    ]),
    vertexShader: ShaderChunk.meshphong_vert,
    fragmentShader: ShaderChunk.meshphong_frag
  },
  standard: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.roughnessmap,
      UniformsLib.metalnessmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: {value: new Color(0)},
        roughness: {value: 1},
        metalness: {value: 0},
        envMapIntensity: {value: 1}
      }
    ]),
    vertexShader: ShaderChunk.meshphysical_vert,
    fragmentShader: ShaderChunk.meshphysical_frag
  },
  toon: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.gradientmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: {value: new Color(0)}
      }
    ]),
    vertexShader: ShaderChunk.meshtoon_vert,
    fragmentShader: ShaderChunk.meshtoon_frag
  },
  matcap: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.fog,
      {
        matcap: {value: null}
      }
    ]),
    vertexShader: ShaderChunk.meshmatcap_vert,
    fragmentShader: ShaderChunk.meshmatcap_frag
  },
  points: {
    uniforms: mergeUniforms([
      UniformsLib.points,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.points_vert,
    fragmentShader: ShaderChunk.points_frag
  },
  dashed: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.fog,
      {
        scale: {value: 1},
        dashSize: {value: 1},
        totalSize: {value: 2}
      }
    ]),
    vertexShader: ShaderChunk.linedashed_vert,
    fragmentShader: ShaderChunk.linedashed_frag
  },
  depth: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.displacementmap
    ]),
    vertexShader: ShaderChunk.depth_vert,
    fragmentShader: ShaderChunk.depth_frag
  },
  normal: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      {
        opacity: {value: 1}
      }
    ]),
    vertexShader: ShaderChunk.meshnormal_vert,
    fragmentShader: ShaderChunk.meshnormal_frag
  },
  sprite: {
    uniforms: mergeUniforms([
      UniformsLib.sprite,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.sprite_vert,
    fragmentShader: ShaderChunk.sprite_frag
  },
  background: {
    uniforms: {
      uvTransform: {value: new Matrix3$1()},
      t2D: {value: null}
    },
    vertexShader: ShaderChunk.background_vert,
    fragmentShader: ShaderChunk.background_frag
  },
  cube: {
    uniforms: mergeUniforms([
      UniformsLib.envmap,
      {
        opacity: {value: 1}
      }
    ]),
    vertexShader: ShaderChunk.cube_vert,
    fragmentShader: ShaderChunk.cube_frag
  },
  equirect: {
    uniforms: {
      tEquirect: {value: null}
    },
    vertexShader: ShaderChunk.equirect_vert,
    fragmentShader: ShaderChunk.equirect_frag
  },
  distanceRGBA: {
    uniforms: mergeUniforms([
      UniformsLib.common,
      UniformsLib.displacementmap,
      {
        referencePosition: {value: new Vector3$1()},
        nearDistance: {value: 1},
        farDistance: {value: 1e3}
      }
    ]),
    vertexShader: ShaderChunk.distanceRGBA_vert,
    fragmentShader: ShaderChunk.distanceRGBA_frag
  },
  shadow: {
    uniforms: mergeUniforms([
      UniformsLib.lights,
      UniformsLib.fog,
      {
        color: {value: new Color(0)},
        opacity: {value: 1}
      }
    ]),
    vertexShader: ShaderChunk.shadow_vert,
    fragmentShader: ShaderChunk.shadow_frag
  }
};
ShaderLib.physical = {
  uniforms: mergeUniforms([
    ShaderLib.standard.uniforms,
    {
      clearcoat: {value: 0},
      clearcoatMap: {value: null},
      clearcoatRoughness: {value: 0},
      clearcoatRoughnessMap: {value: null},
      clearcoatNormalScale: {value: new Vector2$1(1, 1)},
      clearcoatNormalMap: {value: null},
      sheen: {value: 0},
      sheenColor: {value: new Color(0)},
      sheenColorMap: {value: null},
      sheenRoughness: {value: 1},
      sheenRoughnessMap: {value: null},
      transmission: {value: 0},
      transmissionMap: {value: null},
      transmissionSamplerSize: {value: new Vector2$1()},
      transmissionSamplerMap: {value: null},
      thickness: {value: 0},
      thicknessMap: {value: null},
      attenuationDistance: {value: 0},
      attenuationColor: {value: new Color(0)},
      specularIntensity: {value: 1},
      specularIntensityMap: {value: null},
      specularColor: {value: new Color(1, 1, 1)},
      specularColorMap: {value: null}
    }
  ]),
  vertexShader: ShaderChunk.meshphysical_vert,
  fragmentShader: ShaderChunk.meshphysical_frag
};
function WebGLBackground(renderer, cubemaps, state, objects, alpha, premultipliedAlpha) {
  const clearColor = new Color(0);
  let clearAlpha = alpha === true ? 0 : 1;
  let planeMesh;
  let boxMesh;
  let currentBackground = null;
  let currentBackgroundVersion = 0;
  let currentTonemapping = null;
  function render(renderList, scene) {
    let forceClear = false;
    let background = scene.isScene === true ? scene.background : null;
    if (background && background.isTexture) {
      background = cubemaps.get(background);
    }
    const xr = renderer.xr;
    const session = xr.getSession && xr.getSession();
    if (session && session.environmentBlendMode === "additive") {
      background = null;
    }
    if (background === null) {
      setClear(clearColor, clearAlpha);
    } else if (background && background.isColor) {
      setClear(background, 1);
      forceClear = true;
    }
    if (renderer.autoClear || forceClear) {
      renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil);
    }
    if (background && (background.isCubeTexture || background.mapping === CubeUVReflectionMapping)) {
      if (boxMesh === void 0) {
        boxMesh = new Mesh(new BoxGeometry(1, 1, 1), new ShaderMaterial({
          name: "BackgroundCubeMaterial",
          uniforms: cloneUniforms(ShaderLib.cube.uniforms),
          vertexShader: ShaderLib.cube.vertexShader,
          fragmentShader: ShaderLib.cube.fragmentShader,
          side: BackSide,
          depthTest: false,
          depthWrite: false,
          fog: false
        }));
        boxMesh.geometry.deleteAttribute("normal");
        boxMesh.geometry.deleteAttribute("uv");
        boxMesh.onBeforeRender = function(renderer2, scene2, camera) {
          this.matrixWorld.copyPosition(camera.matrixWorld);
        };
        Object.defineProperty(boxMesh.material, "envMap", {
          get: function() {
            return this.uniforms.envMap.value;
          }
        });
        objects.update(boxMesh);
      }
      boxMesh.material.uniforms.envMap.value = background;
      boxMesh.material.uniforms.flipEnvMap.value = background.isCubeTexture && background.isRenderTargetTexture === false ? -1 : 1;
      if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
        boxMesh.material.needsUpdate = true;
        currentBackground = background;
        currentBackgroundVersion = background.version;
        currentTonemapping = renderer.toneMapping;
      }
      renderList.unshift(boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null);
    } else if (background && background.isTexture) {
      if (planeMesh === void 0) {
        planeMesh = new Mesh(new PlaneGeometry(2, 2), new ShaderMaterial({
          name: "BackgroundMaterial",
          uniforms: cloneUniforms(ShaderLib.background.uniforms),
          vertexShader: ShaderLib.background.vertexShader,
          fragmentShader: ShaderLib.background.fragmentShader,
          side: FrontSide,
          depthTest: false,
          depthWrite: false,
          fog: false
        }));
        planeMesh.geometry.deleteAttribute("normal");
        Object.defineProperty(planeMesh.material, "map", {
          get: function() {
            return this.uniforms.t2D.value;
          }
        });
        objects.update(planeMesh);
      }
      planeMesh.material.uniforms.t2D.value = background;
      if (background.matrixAutoUpdate === true) {
        background.updateMatrix();
      }
      planeMesh.material.uniforms.uvTransform.value.copy(background.matrix);
      if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
        planeMesh.material.needsUpdate = true;
        currentBackground = background;
        currentBackgroundVersion = background.version;
        currentTonemapping = renderer.toneMapping;
      }
      renderList.unshift(planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null);
    }
  }
  function setClear(color, alpha2) {
    state.buffers.color.setClear(color.r, color.g, color.b, alpha2, premultipliedAlpha);
  }
  return {
    getClearColor: function() {
      return clearColor;
    },
    setClearColor: function(color, alpha2 = 1) {
      clearColor.set(color);
      clearAlpha = alpha2;
      setClear(clearColor, clearAlpha);
    },
    getClearAlpha: function() {
      return clearAlpha;
    },
    setClearAlpha: function(alpha2) {
      clearAlpha = alpha2;
      setClear(clearColor, clearAlpha);
    },
    render
  };
}
function WebGLBindingStates(gl, extensions, attributes, capabilities) {
  const maxVertexAttributes = gl.getParameter(34921);
  const extension = capabilities.isWebGL2 ? null : extensions.get("OES_vertex_array_object");
  const vaoAvailable = capabilities.isWebGL2 || extension !== null;
  const bindingStates = {};
  const defaultState = createBindingState(null);
  let currentState = defaultState;
  function setup(object, material, program, geometry, index) {
    let updateBuffers = false;
    if (vaoAvailable) {
      const state = getBindingState(geometry, program, material);
      if (currentState !== state) {
        currentState = state;
        bindVertexArrayObject(currentState.object);
      }
      updateBuffers = needsUpdate(geometry, index);
      if (updateBuffers)
        saveCache(geometry, index);
    } else {
      const wireframe = material.wireframe === true;
      if (currentState.geometry !== geometry.id || currentState.program !== program.id || currentState.wireframe !== wireframe) {
        currentState.geometry = geometry.id;
        currentState.program = program.id;
        currentState.wireframe = wireframe;
        updateBuffers = true;
      }
    }
    if (object.isInstancedMesh === true) {
      updateBuffers = true;
    }
    if (index !== null) {
      attributes.update(index, 34963);
    }
    if (updateBuffers) {
      setupVertexAttributes(object, material, program, geometry);
      if (index !== null) {
        gl.bindBuffer(34963, attributes.get(index).buffer);
      }
    }
  }
  function createVertexArrayObject() {
    if (capabilities.isWebGL2)
      return gl.createVertexArray();
    return extension.createVertexArrayOES();
  }
  function bindVertexArrayObject(vao) {
    if (capabilities.isWebGL2)
      return gl.bindVertexArray(vao);
    return extension.bindVertexArrayOES(vao);
  }
  function deleteVertexArrayObject(vao) {
    if (capabilities.isWebGL2)
      return gl.deleteVertexArray(vao);
    return extension.deleteVertexArrayOES(vao);
  }
  function getBindingState(geometry, program, material) {
    const wireframe = material.wireframe === true;
    let programMap = bindingStates[geometry.id];
    if (programMap === void 0) {
      programMap = {};
      bindingStates[geometry.id] = programMap;
    }
    let stateMap = programMap[program.id];
    if (stateMap === void 0) {
      stateMap = {};
      programMap[program.id] = stateMap;
    }
    let state = stateMap[wireframe];
    if (state === void 0) {
      state = createBindingState(createVertexArrayObject());
      stateMap[wireframe] = state;
    }
    return state;
  }
  function createBindingState(vao) {
    const newAttributes = [];
    const enabledAttributes = [];
    const attributeDivisors = [];
    for (let i = 0; i < maxVertexAttributes; i++) {
      newAttributes[i] = 0;
      enabledAttributes[i] = 0;
      attributeDivisors[i] = 0;
    }
    return {
      geometry: null,
      program: null,
      wireframe: false,
      newAttributes,
      enabledAttributes,
      attributeDivisors,
      object: vao,
      attributes: {},
      index: null
    };
  }
  function needsUpdate(geometry, index) {
    const cachedAttributes = currentState.attributes;
    const geometryAttributes = geometry.attributes;
    let attributesNum = 0;
    for (const key in geometryAttributes) {
      const cachedAttribute = cachedAttributes[key];
      const geometryAttribute = geometryAttributes[key];
      if (cachedAttribute === void 0)
        return true;
      if (cachedAttribute.attribute !== geometryAttribute)
        return true;
      if (cachedAttribute.data !== geometryAttribute.data)
        return true;
      attributesNum++;
    }
    if (currentState.attributesNum !== attributesNum)
      return true;
    if (currentState.index !== index)
      return true;
    return false;
  }
  function saveCache(geometry, index) {
    const cache = {};
    const attributes2 = geometry.attributes;
    let attributesNum = 0;
    for (const key in attributes2) {
      const attribute = attributes2[key];
      const data = {};
      data.attribute = attribute;
      if (attribute.data) {
        data.data = attribute.data;
      }
      cache[key] = data;
      attributesNum++;
    }
    currentState.attributes = cache;
    currentState.attributesNum = attributesNum;
    currentState.index = index;
  }
  function initAttributes() {
    const newAttributes = currentState.newAttributes;
    for (let i = 0, il = newAttributes.length; i < il; i++) {
      newAttributes[i] = 0;
    }
  }
  function enableAttribute(attribute) {
    enableAttributeAndDivisor(attribute, 0);
  }
  function enableAttributeAndDivisor(attribute, meshPerAttribute) {
    const newAttributes = currentState.newAttributes;
    const enabledAttributes = currentState.enabledAttributes;
    const attributeDivisors = currentState.attributeDivisors;
    newAttributes[attribute] = 1;
    if (enabledAttributes[attribute] === 0) {
      gl.enableVertexAttribArray(attribute);
      enabledAttributes[attribute] = 1;
    }
    if (attributeDivisors[attribute] !== meshPerAttribute) {
      const extension2 = capabilities.isWebGL2 ? gl : extensions.get("ANGLE_instanced_arrays");
      extension2[capabilities.isWebGL2 ? "vertexAttribDivisor" : "vertexAttribDivisorANGLE"](attribute, meshPerAttribute);
      attributeDivisors[attribute] = meshPerAttribute;
    }
  }
  function disableUnusedAttributes() {
    const newAttributes = currentState.newAttributes;
    const enabledAttributes = currentState.enabledAttributes;
    for (let i = 0, il = enabledAttributes.length; i < il; i++) {
      if (enabledAttributes[i] !== newAttributes[i]) {
        gl.disableVertexAttribArray(i);
        enabledAttributes[i] = 0;
      }
    }
  }
  function vertexAttribPointer(index, size, type, normalized, stride, offset) {
    if (capabilities.isWebGL2 === true && (type === 5124 || type === 5125)) {
      gl.vertexAttribIPointer(index, size, type, stride, offset);
    } else {
      gl.vertexAttribPointer(index, size, type, normalized, stride, offset);
    }
  }
  function setupVertexAttributes(object, material, program, geometry) {
    if (capabilities.isWebGL2 === false && (object.isInstancedMesh || geometry.isInstancedBufferGeometry)) {
      if (extensions.get("ANGLE_instanced_arrays") === null)
        return;
    }
    initAttributes();
    const geometryAttributes = geometry.attributes;
    const programAttributes = program.getAttributes();
    const materialDefaultAttributeValues = material.defaultAttributeValues;
    for (const name in programAttributes) {
      const programAttribute = programAttributes[name];
      if (programAttribute.location >= 0) {
        let geometryAttribute = geometryAttributes[name];
        if (geometryAttribute === void 0) {
          if (name === "instanceMatrix" && object.instanceMatrix)
            geometryAttribute = object.instanceMatrix;
          if (name === "instanceColor" && object.instanceColor)
            geometryAttribute = object.instanceColor;
        }
        if (geometryAttribute !== void 0) {
          const normalized = geometryAttribute.normalized;
          const size = geometryAttribute.itemSize;
          const attribute = attributes.get(geometryAttribute);
          if (attribute === void 0)
            continue;
          const buffer = attribute.buffer;
          const type = attribute.type;
          const bytesPerElement = attribute.bytesPerElement;
          if (geometryAttribute.isInterleavedBufferAttribute) {
            const data = geometryAttribute.data;
            const stride = data.stride;
            const offset = geometryAttribute.offset;
            if (data && data.isInstancedInterleavedBuffer) {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttributeAndDivisor(programAttribute.location + i, data.meshPerAttribute);
              }
              if (object.isInstancedMesh !== true && geometry._maxInstanceCount === void 0) {
                geometry._maxInstanceCount = data.meshPerAttribute * data.count;
              }
            } else {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttribute(programAttribute.location + i);
              }
            }
            gl.bindBuffer(34962, buffer);
            for (let i = 0; i < programAttribute.locationSize; i++) {
              vertexAttribPointer(programAttribute.location + i, size / programAttribute.locationSize, type, normalized, stride * bytesPerElement, (offset + size / programAttribute.locationSize * i) * bytesPerElement);
            }
          } else {
            if (geometryAttribute.isInstancedBufferAttribute) {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttributeAndDivisor(programAttribute.location + i, geometryAttribute.meshPerAttribute);
              }
              if (object.isInstancedMesh !== true && geometry._maxInstanceCount === void 0) {
                geometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;
              }
            } else {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttribute(programAttribute.location + i);
              }
            }
            gl.bindBuffer(34962, buffer);
            for (let i = 0; i < programAttribute.locationSize; i++) {
              vertexAttribPointer(programAttribute.location + i, size / programAttribute.locationSize, type, normalized, size * bytesPerElement, size / programAttribute.locationSize * i * bytesPerElement);
            }
          }
        } else if (materialDefaultAttributeValues !== void 0) {
          const value = materialDefaultAttributeValues[name];
          if (value !== void 0) {
            switch (value.length) {
              case 2:
                gl.vertexAttrib2fv(programAttribute.location, value);
                break;
              case 3:
                gl.vertexAttrib3fv(programAttribute.location, value);
                break;
              case 4:
                gl.vertexAttrib4fv(programAttribute.location, value);
                break;
              default:
                gl.vertexAttrib1fv(programAttribute.location, value);
            }
          }
        }
      }
    }
    disableUnusedAttributes();
  }
  function dispose() {
    reset();
    for (const geometryId in bindingStates) {
      const programMap = bindingStates[geometryId];
      for (const programId in programMap) {
        const stateMap = programMap[programId];
        for (const wireframe in stateMap) {
          deleteVertexArrayObject(stateMap[wireframe].object);
          delete stateMap[wireframe];
        }
        delete programMap[programId];
      }
      delete bindingStates[geometryId];
    }
  }
  function releaseStatesOfGeometry(geometry) {
    if (bindingStates[geometry.id] === void 0)
      return;
    const programMap = bindingStates[geometry.id];
    for (const programId in programMap) {
      const stateMap = programMap[programId];
      for (const wireframe in stateMap) {
        deleteVertexArrayObject(stateMap[wireframe].object);
        delete stateMap[wireframe];
      }
      delete programMap[programId];
    }
    delete bindingStates[geometry.id];
  }
  function releaseStatesOfProgram(program) {
    for (const geometryId in bindingStates) {
      const programMap = bindingStates[geometryId];
      if (programMap[program.id] === void 0)
        continue;
      const stateMap = programMap[program.id];
      for (const wireframe in stateMap) {
        deleteVertexArrayObject(stateMap[wireframe].object);
        delete stateMap[wireframe];
      }
      delete programMap[program.id];
    }
  }
  function reset() {
    resetDefaultState();
    if (currentState === defaultState)
      return;
    currentState = defaultState;
    bindVertexArrayObject(currentState.object);
  }
  function resetDefaultState() {
    defaultState.geometry = null;
    defaultState.program = null;
    defaultState.wireframe = false;
  }
  return {
    setup,
    reset,
    resetDefaultState,
    dispose,
    releaseStatesOfGeometry,
    releaseStatesOfProgram,
    initAttributes,
    enableAttribute,
    disableUnusedAttributes
  };
}
function WebGLBufferRenderer(gl, extensions, info, capabilities) {
  const isWebGL2 = capabilities.isWebGL2;
  let mode;
  function setMode(value) {
    mode = value;
  }
  function render(start, count) {
    gl.drawArrays(mode, start, count);
    info.update(count, mode, 1);
  }
  function renderInstances(start, count, primcount) {
    if (primcount === 0)
      return;
    let extension, methodName;
    if (isWebGL2) {
      extension = gl;
      methodName = "drawArraysInstanced";
    } else {
      extension = extensions.get("ANGLE_instanced_arrays");
      methodName = "drawArraysInstancedANGLE";
      if (extension === null) {
        console.error("THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.");
        return;
      }
    }
    extension[methodName](mode, start, count, primcount);
    info.update(count, mode, primcount);
  }
  this.setMode = setMode;
  this.render = render;
  this.renderInstances = renderInstances;
}
function WebGLCapabilities(gl, extensions, parameters) {
  let maxAnisotropy;
  function getMaxAnisotropy() {
    if (maxAnisotropy !== void 0)
      return maxAnisotropy;
    if (extensions.has("EXT_texture_filter_anisotropic") === true) {
      const extension = extensions.get("EXT_texture_filter_anisotropic");
      maxAnisotropy = gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT);
    } else {
      maxAnisotropy = 0;
    }
    return maxAnisotropy;
  }
  function getMaxPrecision(precision2) {
    if (precision2 === "highp") {
      if (gl.getShaderPrecisionFormat(35633, 36338).precision > 0 && gl.getShaderPrecisionFormat(35632, 36338).precision > 0) {
        return "highp";
      }
      precision2 = "mediump";
    }
    if (precision2 === "mediump") {
      if (gl.getShaderPrecisionFormat(35633, 36337).precision > 0 && gl.getShaderPrecisionFormat(35632, 36337).precision > 0) {
        return "mediump";
      }
    }
    return "lowp";
  }
  const isWebGL2 = typeof WebGL2RenderingContext !== "undefined" && gl instanceof WebGL2RenderingContext || typeof WebGL2ComputeRenderingContext !== "undefined" && gl instanceof WebGL2ComputeRenderingContext;
  let precision = parameters.precision !== void 0 ? parameters.precision : "highp";
  const maxPrecision = getMaxPrecision(precision);
  if (maxPrecision !== precision) {
    console.warn("THREE.WebGLRenderer:", precision, "not supported, using", maxPrecision, "instead.");
    precision = maxPrecision;
  }
  const drawBuffers = isWebGL2 || extensions.has("WEBGL_draw_buffers");
  const logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;
  const maxTextures = gl.getParameter(34930);
  const maxVertexTextures = gl.getParameter(35660);
  const maxTextureSize = gl.getParameter(3379);
  const maxCubemapSize = gl.getParameter(34076);
  const maxAttributes = gl.getParameter(34921);
  const maxVertexUniforms = gl.getParameter(36347);
  const maxVaryings = gl.getParameter(36348);
  const maxFragmentUniforms = gl.getParameter(36349);
  const vertexTextures = maxVertexTextures > 0;
  const floatFragmentTextures = isWebGL2 || extensions.has("OES_texture_float");
  const floatVertexTextures = vertexTextures && floatFragmentTextures;
  const maxSamples = isWebGL2 ? gl.getParameter(36183) : 0;
  return {
    isWebGL2,
    drawBuffers,
    getMaxAnisotropy,
    getMaxPrecision,
    precision,
    logarithmicDepthBuffer,
    maxTextures,
    maxVertexTextures,
    maxTextureSize,
    maxCubemapSize,
    maxAttributes,
    maxVertexUniforms,
    maxVaryings,
    maxFragmentUniforms,
    vertexTextures,
    floatFragmentTextures,
    floatVertexTextures,
    maxSamples
  };
}
function WebGLClipping(properties) {
  const scope = this;
  let globalState = null, numGlobalPlanes = 0, localClippingEnabled = false, renderingShadows = false;
  const plane = new Plane$1(), viewNormalMatrix = new Matrix3$1(), uniform = {value: null, needsUpdate: false};
  this.uniform = uniform;
  this.numPlanes = 0;
  this.numIntersection = 0;
  this.init = function(planes, enableLocalClipping, camera) {
    const enabled = planes.length !== 0 || enableLocalClipping || numGlobalPlanes !== 0 || localClippingEnabled;
    localClippingEnabled = enableLocalClipping;
    globalState = projectPlanes(planes, camera, 0);
    numGlobalPlanes = planes.length;
    return enabled;
  };
  this.beginShadows = function() {
    renderingShadows = true;
    projectPlanes(null);
  };
  this.endShadows = function() {
    renderingShadows = false;
    resetGlobalState();
  };
  this.setState = function(material, camera, useCache) {
    const planes = material.clippingPlanes, clipIntersection = material.clipIntersection, clipShadows = material.clipShadows;
    const materialProperties = properties.get(material);
    if (!localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && !clipShadows) {
      if (renderingShadows) {
        projectPlanes(null);
      } else {
        resetGlobalState();
      }
    } else {
      const nGlobal = renderingShadows ? 0 : numGlobalPlanes, lGlobal = nGlobal * 4;
      let dstArray = materialProperties.clippingState || null;
      uniform.value = dstArray;
      dstArray = projectPlanes(planes, camera, lGlobal, useCache);
      for (let i = 0; i !== lGlobal; ++i) {
        dstArray[i] = globalState[i];
      }
      materialProperties.clippingState = dstArray;
      this.numIntersection = clipIntersection ? this.numPlanes : 0;
      this.numPlanes += nGlobal;
    }
  };
  function resetGlobalState() {
    if (uniform.value !== globalState) {
      uniform.value = globalState;
      uniform.needsUpdate = numGlobalPlanes > 0;
    }
    scope.numPlanes = numGlobalPlanes;
    scope.numIntersection = 0;
  }
  function projectPlanes(planes, camera, dstOffset, skipTransform) {
    const nPlanes = planes !== null ? planes.length : 0;
    let dstArray = null;
    if (nPlanes !== 0) {
      dstArray = uniform.value;
      if (skipTransform !== true || dstArray === null) {
        const flatSize = dstOffset + nPlanes * 4, viewMatrix = camera.matrixWorldInverse;
        viewNormalMatrix.getNormalMatrix(viewMatrix);
        if (dstArray === null || dstArray.length < flatSize) {
          dstArray = new Float32Array(flatSize);
        }
        for (let i = 0, i4 = dstOffset; i !== nPlanes; ++i, i4 += 4) {
          plane.copy(planes[i]).applyMatrix4(viewMatrix, viewNormalMatrix);
          plane.normal.toArray(dstArray, i4);
          dstArray[i4 + 3] = plane.constant;
        }
      }
      uniform.value = dstArray;
      uniform.needsUpdate = true;
    }
    scope.numPlanes = nPlanes;
    scope.numIntersection = 0;
    return dstArray;
  }
}
function WebGLCubeMaps(renderer) {
  let cubemaps = new WeakMap();
  function mapTextureMapping(texture, mapping) {
    if (mapping === EquirectangularReflectionMapping) {
      texture.mapping = CubeReflectionMapping;
    } else if (mapping === EquirectangularRefractionMapping) {
      texture.mapping = CubeRefractionMapping;
    }
    return texture;
  }
  function get(texture) {
    if (texture && texture.isTexture && texture.isRenderTargetTexture === false) {
      const mapping = texture.mapping;
      if (mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping) {
        if (cubemaps.has(texture)) {
          const cubemap = cubemaps.get(texture).texture;
          return mapTextureMapping(cubemap, texture.mapping);
        } else {
          const image = texture.image;
          if (image && image.height > 0) {
            const renderTarget = new WebGLCubeRenderTarget(image.height / 2);
            renderTarget.fromEquirectangularTexture(renderer, texture);
            cubemaps.set(texture, renderTarget);
            texture.addEventListener("dispose", onTextureDispose);
            return mapTextureMapping(renderTarget.texture, texture.mapping);
          } else {
            return null;
          }
        }
      }
    }
    return texture;
  }
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    const cubemap = cubemaps.get(texture);
    if (cubemap !== void 0) {
      cubemaps.delete(texture);
      cubemap.dispose();
    }
  }
  function dispose() {
    cubemaps = new WeakMap();
  }
  return {
    get,
    dispose
  };
}
class OrthographicCamera extends Camera {
  constructor(left = -1, right = 1, top = 1, bottom = -1, near = 0.1, far = 2e3) {
    super();
    this.type = "OrthographicCamera";
    this.zoom = 1;
    this.view = null;
    this.left = left;
    this.right = right;
    this.top = top;
    this.bottom = bottom;
    this.near = near;
    this.far = far;
    this.updateProjectionMatrix();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.left = source.left;
    this.right = source.right;
    this.top = source.top;
    this.bottom = source.bottom;
    this.near = source.near;
    this.far = source.far;
    this.zoom = source.zoom;
    this.view = source.view === null ? null : Object.assign({}, source.view);
    return this;
  }
  setViewOffset(fullWidth, fullHeight, x, y, width, height) {
    if (this.view === null) {
      this.view = {
        enabled: true,
        fullWidth: 1,
        fullHeight: 1,
        offsetX: 0,
        offsetY: 0,
        width: 1,
        height: 1
      };
    }
    this.view.enabled = true;
    this.view.fullWidth = fullWidth;
    this.view.fullHeight = fullHeight;
    this.view.offsetX = x;
    this.view.offsetY = y;
    this.view.width = width;
    this.view.height = height;
    this.updateProjectionMatrix();
  }
  clearViewOffset() {
    if (this.view !== null) {
      this.view.enabled = false;
    }
    this.updateProjectionMatrix();
  }
  updateProjectionMatrix() {
    const dx = (this.right - this.left) / (2 * this.zoom);
    const dy = (this.top - this.bottom) / (2 * this.zoom);
    const cx = (this.right + this.left) / 2;
    const cy = (this.top + this.bottom) / 2;
    let left = cx - dx;
    let right = cx + dx;
    let top = cy + dy;
    let bottom = cy - dy;
    if (this.view !== null && this.view.enabled) {
      const scaleW = (this.right - this.left) / this.view.fullWidth / this.zoom;
      const scaleH = (this.top - this.bottom) / this.view.fullHeight / this.zoom;
      left += scaleW * this.view.offsetX;
      right = left + scaleW * this.view.width;
      top -= scaleH * this.view.offsetY;
      bottom = top - scaleH * this.view.height;
    }
    this.projectionMatrix.makeOrthographic(left, right, top, bottom, this.near, this.far);
    this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.zoom = this.zoom;
    data.object.left = this.left;
    data.object.right = this.right;
    data.object.top = this.top;
    data.object.bottom = this.bottom;
    data.object.near = this.near;
    data.object.far = this.far;
    if (this.view !== null)
      data.object.view = Object.assign({}, this.view);
    return data;
  }
}
OrthographicCamera.prototype.isOrthographicCamera = true;
class RawShaderMaterial extends ShaderMaterial {
  constructor(parameters) {
    super(parameters);
    this.type = "RawShaderMaterial";
  }
}
RawShaderMaterial.prototype.isRawShaderMaterial = true;
const LOD_MIN = 4;
const LOD_MAX = 8;
const SIZE_MAX = Math.pow(2, LOD_MAX);
const EXTRA_LOD_SIGMA = [0.125, 0.215, 0.35, 0.446, 0.526, 0.582];
const TOTAL_LODS = LOD_MAX - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;
const MAX_SAMPLES = 20;
const _flatCamera = /* @__PURE__ */ new OrthographicCamera();
const {_lodPlanes, _sizeLods, _sigmas} = /* @__PURE__ */ _createPlanes();
const _clearColor = /* @__PURE__ */ new Color();
let _oldTarget = null;
const PHI = (1 + Math.sqrt(5)) / 2;
const INV_PHI = 1 / PHI;
const _axisDirections = [
  /* @__PURE__ */ new Vector3$1(1, 1, 1),
  /* @__PURE__ */ new Vector3$1(-1, 1, 1),
  /* @__PURE__ */ new Vector3$1(1, 1, -1),
  /* @__PURE__ */ new Vector3$1(-1, 1, -1),
  /* @__PURE__ */ new Vector3$1(0, PHI, INV_PHI),
  /* @__PURE__ */ new Vector3$1(0, PHI, -INV_PHI),
  /* @__PURE__ */ new Vector3$1(INV_PHI, 0, PHI),
  /* @__PURE__ */ new Vector3$1(-INV_PHI, 0, PHI),
  /* @__PURE__ */ new Vector3$1(PHI, INV_PHI, 0),
  /* @__PURE__ */ new Vector3$1(-PHI, INV_PHI, 0)
];
class PMREMGenerator {
  constructor(renderer) {
    this._renderer = renderer;
    this._pingPongRenderTarget = null;
    this._blurMaterial = _getBlurShader(MAX_SAMPLES);
    this._equirectShader = null;
    this._cubemapShader = null;
    this._compileMaterial(this._blurMaterial);
  }
  fromScene(scene, sigma = 0, near = 0.1, far = 100) {
    _oldTarget = this._renderer.getRenderTarget();
    const cubeUVRenderTarget = this._allocateTargets();
    this._sceneToCubeUV(scene, near, far, cubeUVRenderTarget);
    if (sigma > 0) {
      this._blur(cubeUVRenderTarget, 0, 0, sigma);
    }
    this._applyPMREM(cubeUVRenderTarget);
    this._cleanup(cubeUVRenderTarget);
    return cubeUVRenderTarget;
  }
  fromEquirectangular(equirectangular, renderTarget = null) {
    return this._fromTexture(equirectangular, renderTarget);
  }
  fromCubemap(cubemap, renderTarget = null) {
    return this._fromTexture(cubemap, renderTarget);
  }
  compileCubemapShader() {
    if (this._cubemapShader === null) {
      this._cubemapShader = _getCubemapShader();
      this._compileMaterial(this._cubemapShader);
    }
  }
  compileEquirectangularShader() {
    if (this._equirectShader === null) {
      this._equirectShader = _getEquirectShader();
      this._compileMaterial(this._equirectShader);
    }
  }
  dispose() {
    this._blurMaterial.dispose();
    if (this._pingPongRenderTarget !== null)
      this._pingPongRenderTarget.dispose();
    if (this._cubemapShader !== null)
      this._cubemapShader.dispose();
    if (this._equirectShader !== null)
      this._equirectShader.dispose();
    for (let i = 0; i < _lodPlanes.length; i++) {
      _lodPlanes[i].dispose();
    }
  }
  _cleanup(outputTarget) {
    this._renderer.setRenderTarget(_oldTarget);
    outputTarget.scissorTest = false;
    _setViewport(outputTarget, 0, 0, outputTarget.width, outputTarget.height);
  }
  _fromTexture(texture, renderTarget) {
    _oldTarget = this._renderer.getRenderTarget();
    const cubeUVRenderTarget = renderTarget || this._allocateTargets(texture);
    this._textureToCubeUV(texture, cubeUVRenderTarget);
    this._applyPMREM(cubeUVRenderTarget);
    this._cleanup(cubeUVRenderTarget);
    return cubeUVRenderTarget;
  }
  _allocateTargets(texture) {
    const params = {
      magFilter: LinearFilter,
      minFilter: LinearFilter,
      generateMipmaps: false,
      type: HalfFloatType,
      format: RGBAFormat,
      encoding: LinearEncoding,
      depthBuffer: false
    };
    const cubeUVRenderTarget = _createRenderTarget(params);
    cubeUVRenderTarget.depthBuffer = texture ? false : true;
    if (this._pingPongRenderTarget === null) {
      this._pingPongRenderTarget = _createRenderTarget(params);
    }
    return cubeUVRenderTarget;
  }
  _compileMaterial(material) {
    const tmpMesh = new Mesh(_lodPlanes[0], material);
    this._renderer.compile(tmpMesh, _flatCamera);
  }
  _sceneToCubeUV(scene, near, far, cubeUVRenderTarget) {
    const fov2 = 90;
    const aspect2 = 1;
    const cubeCamera = new PerspectiveCamera(fov2, aspect2, near, far);
    const upSign = [1, -1, 1, 1, 1, 1];
    const forwardSign = [1, 1, 1, -1, -1, -1];
    const renderer = this._renderer;
    const originalAutoClear = renderer.autoClear;
    const toneMapping = renderer.toneMapping;
    renderer.getClearColor(_clearColor);
    renderer.toneMapping = NoToneMapping;
    renderer.autoClear = false;
    const backgroundMaterial = new MeshBasicMaterial({
      name: "PMREM.Background",
      side: BackSide,
      depthWrite: false,
      depthTest: false
    });
    const backgroundBox = new Mesh(new BoxGeometry(), backgroundMaterial);
    let useSolidColor = false;
    const background = scene.background;
    if (background) {
      if (background.isColor) {
        backgroundMaterial.color.copy(background);
        scene.background = null;
        useSolidColor = true;
      }
    } else {
      backgroundMaterial.color.copy(_clearColor);
      useSolidColor = true;
    }
    for (let i = 0; i < 6; i++) {
      const col = i % 3;
      if (col === 0) {
        cubeCamera.up.set(0, upSign[i], 0);
        cubeCamera.lookAt(forwardSign[i], 0, 0);
      } else if (col === 1) {
        cubeCamera.up.set(0, 0, upSign[i]);
        cubeCamera.lookAt(0, forwardSign[i], 0);
      } else {
        cubeCamera.up.set(0, upSign[i], 0);
        cubeCamera.lookAt(0, 0, forwardSign[i]);
      }
      _setViewport(cubeUVRenderTarget, col * SIZE_MAX, i > 2 ? SIZE_MAX : 0, SIZE_MAX, SIZE_MAX);
      renderer.setRenderTarget(cubeUVRenderTarget);
      if (useSolidColor) {
        renderer.render(backgroundBox, cubeCamera);
      }
      renderer.render(scene, cubeCamera);
    }
    backgroundBox.geometry.dispose();
    backgroundBox.material.dispose();
    renderer.toneMapping = toneMapping;
    renderer.autoClear = originalAutoClear;
    scene.background = background;
  }
  _textureToCubeUV(texture, cubeUVRenderTarget) {
    const renderer = this._renderer;
    const isCubeTexture = texture.mapping === CubeReflectionMapping || texture.mapping === CubeRefractionMapping;
    if (isCubeTexture) {
      if (this._cubemapShader === null) {
        this._cubemapShader = _getCubemapShader();
      }
      this._cubemapShader.uniforms.flipEnvMap.value = texture.isRenderTargetTexture === false ? -1 : 1;
    } else {
      if (this._equirectShader === null) {
        this._equirectShader = _getEquirectShader();
      }
    }
    const material = isCubeTexture ? this._cubemapShader : this._equirectShader;
    const mesh = new Mesh(_lodPlanes[0], material);
    const uniforms = material.uniforms;
    uniforms["envMap"].value = texture;
    if (!isCubeTexture) {
      uniforms["texelSize"].value.set(1 / texture.image.width, 1 / texture.image.height);
    }
    _setViewport(cubeUVRenderTarget, 0, 0, 3 * SIZE_MAX, 2 * SIZE_MAX);
    renderer.setRenderTarget(cubeUVRenderTarget);
    renderer.render(mesh, _flatCamera);
  }
  _applyPMREM(cubeUVRenderTarget) {
    const renderer = this._renderer;
    const autoClear = renderer.autoClear;
    renderer.autoClear = false;
    for (let i = 1; i < TOTAL_LODS; i++) {
      const sigma = Math.sqrt(_sigmas[i] * _sigmas[i] - _sigmas[i - 1] * _sigmas[i - 1]);
      const poleAxis = _axisDirections[(i - 1) % _axisDirections.length];
      this._blur(cubeUVRenderTarget, i - 1, i, sigma, poleAxis);
    }
    renderer.autoClear = autoClear;
  }
  _blur(cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis) {
    const pingPongRenderTarget = this._pingPongRenderTarget;
    this._halfBlur(cubeUVRenderTarget, pingPongRenderTarget, lodIn, lodOut, sigma, "latitudinal", poleAxis);
    this._halfBlur(pingPongRenderTarget, cubeUVRenderTarget, lodOut, lodOut, sigma, "longitudinal", poleAxis);
  }
  _halfBlur(targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis) {
    const renderer = this._renderer;
    const blurMaterial = this._blurMaterial;
    if (direction !== "latitudinal" && direction !== "longitudinal") {
      console.error("blur direction must be either latitudinal or longitudinal!");
    }
    const STANDARD_DEVIATIONS = 3;
    const blurMesh = new Mesh(_lodPlanes[lodOut], blurMaterial);
    const blurUniforms = blurMaterial.uniforms;
    const pixels = _sizeLods[lodIn] - 1;
    const radiansPerPixel = isFinite(sigmaRadians) ? Math.PI / (2 * pixels) : 2 * Math.PI / (2 * MAX_SAMPLES - 1);
    const sigmaPixels = sigmaRadians / radiansPerPixel;
    const samples = isFinite(sigmaRadians) ? 1 + Math.floor(STANDARD_DEVIATIONS * sigmaPixels) : MAX_SAMPLES;
    if (samples > MAX_SAMPLES) {
      console.warn(`sigmaRadians, ${sigmaRadians}, is too large and will clip, as it requested ${samples} samples when the maximum is set to ${MAX_SAMPLES}`);
    }
    const weights = [];
    let sum = 0;
    for (let i = 0; i < MAX_SAMPLES; ++i) {
      const x2 = i / sigmaPixels;
      const weight = Math.exp(-x2 * x2 / 2);
      weights.push(weight);
      if (i === 0) {
        sum += weight;
      } else if (i < samples) {
        sum += 2 * weight;
      }
    }
    for (let i = 0; i < weights.length; i++) {
      weights[i] = weights[i] / sum;
    }
    blurUniforms["envMap"].value = targetIn.texture;
    blurUniforms["samples"].value = samples;
    blurUniforms["weights"].value = weights;
    blurUniforms["latitudinal"].value = direction === "latitudinal";
    if (poleAxis) {
      blurUniforms["poleAxis"].value = poleAxis;
    }
    blurUniforms["dTheta"].value = radiansPerPixel;
    blurUniforms["mipInt"].value = LOD_MAX - lodIn;
    const outputSize = _sizeLods[lodOut];
    const x = 3 * Math.max(0, SIZE_MAX - 2 * outputSize);
    const y = (lodOut === 0 ? 0 : 2 * SIZE_MAX) + 2 * outputSize * (lodOut > LOD_MAX - LOD_MIN ? lodOut - LOD_MAX + LOD_MIN : 0);
    _setViewport(targetOut, x, y, 3 * outputSize, 2 * outputSize);
    renderer.setRenderTarget(targetOut);
    renderer.render(blurMesh, _flatCamera);
  }
}
function _createPlanes() {
  const _lodPlanes2 = [];
  const _sizeLods2 = [];
  const _sigmas2 = [];
  let lod = LOD_MAX;
  for (let i = 0; i < TOTAL_LODS; i++) {
    const sizeLod = Math.pow(2, lod);
    _sizeLods2.push(sizeLod);
    let sigma = 1 / sizeLod;
    if (i > LOD_MAX - LOD_MIN) {
      sigma = EXTRA_LOD_SIGMA[i - LOD_MAX + LOD_MIN - 1];
    } else if (i === 0) {
      sigma = 0;
    }
    _sigmas2.push(sigma);
    const texelSize = 1 / (sizeLod - 1);
    const min = -texelSize / 2;
    const max = 1 + texelSize / 2;
    const uv1 = [min, min, max, min, max, max, min, min, max, max, min, max];
    const cubeFaces = 6;
    const vertices = 6;
    const positionSize = 3;
    const uvSize = 2;
    const faceIndexSize = 1;
    const position = new Float32Array(positionSize * vertices * cubeFaces);
    const uv = new Float32Array(uvSize * vertices * cubeFaces);
    const faceIndex = new Float32Array(faceIndexSize * vertices * cubeFaces);
    for (let face = 0; face < cubeFaces; face++) {
      const x = face % 3 * 2 / 3 - 1;
      const y = face > 2 ? 0 : -1;
      const coordinates = [
        x,
        y,
        0,
        x + 2 / 3,
        y,
        0,
        x + 2 / 3,
        y + 1,
        0,
        x,
        y,
        0,
        x + 2 / 3,
        y + 1,
        0,
        x,
        y + 1,
        0
      ];
      position.set(coordinates, positionSize * vertices * face);
      uv.set(uv1, uvSize * vertices * face);
      const fill = [face, face, face, face, face, face];
      faceIndex.set(fill, faceIndexSize * vertices * face);
    }
    const planes = new BufferGeometry();
    planes.setAttribute("position", new BufferAttribute(position, positionSize));
    planes.setAttribute("uv", new BufferAttribute(uv, uvSize));
    planes.setAttribute("faceIndex", new BufferAttribute(faceIndex, faceIndexSize));
    _lodPlanes2.push(planes);
    if (lod > LOD_MIN) {
      lod--;
    }
  }
  return {_lodPlanes: _lodPlanes2, _sizeLods: _sizeLods2, _sigmas: _sigmas2};
}
function _createRenderTarget(params) {
  const cubeUVRenderTarget = new WebGLRenderTarget(3 * SIZE_MAX, 3 * SIZE_MAX, params);
  cubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;
  cubeUVRenderTarget.texture.name = "PMREM.cubeUv";
  cubeUVRenderTarget.scissorTest = true;
  return cubeUVRenderTarget;
}
function _setViewport(target, x, y, width, height) {
  target.viewport.set(x, y, width, height);
  target.scissor.set(x, y, width, height);
}
function _getBlurShader(maxSamples) {
  const weights = new Float32Array(maxSamples);
  const poleAxis = new Vector3$1(0, 1, 0);
  const shaderMaterial = new RawShaderMaterial({
    name: "SphericalGaussianBlur",
    defines: {n: maxSamples},
    uniforms: {
      envMap: {value: null},
      samples: {value: 1},
      weights: {value: weights},
      latitudinal: {value: false},
      dTheta: {value: 0},
      mipInt: {value: 0},
      poleAxis: {value: poleAxis}
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: `

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;
			uniform int samples;
			uniform float weights[ n ];
			uniform bool latitudinal;
			uniform float dTheta;
			uniform float mipInt;
			uniform vec3 poleAxis;

			#define ENVMAP_TYPE_CUBE_UV
			#include <cube_uv_reflection_fragment>

			vec3 getSample( float theta, vec3 axis ) {

				float cosTheta = cos( theta );
				// Rodrigues' axis-angle rotation
				vec3 sampleDirection = vOutputDirection * cosTheta
					+ cross( axis, vOutputDirection ) * sin( theta )
					+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );

				return bilinearCubeUV( envMap, sampleDirection, mipInt );

			}

			void main() {

				vec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );

				if ( all( equal( axis, vec3( 0.0 ) ) ) ) {

					axis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );

				}

				axis = normalize( axis );

				gl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );
				gl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );

				for ( int i = 1; i < n; i++ ) {

					if ( i >= samples ) {

						break;

					}

					float theta = dTheta * float( i );
					gl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );
					gl_FragColor.rgb += weights[ i ] * getSample( theta, axis );

				}

			}
		`,
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
  return shaderMaterial;
}
function _getEquirectShader() {
  const texelSize = new Vector2$1(1, 1);
  const shaderMaterial = new RawShaderMaterial({
    name: "EquirectangularToCubeUV",
    uniforms: {
      envMap: {value: null},
      texelSize: {value: texelSize}
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: `

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;
			uniform vec2 texelSize;

			#include <common>

			void main() {

				gl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );

				vec3 outputDirection = normalize( vOutputDirection );
				vec2 uv = equirectUv( outputDirection );

				vec2 f = fract( uv / texelSize - 0.5 );
				uv -= f * texelSize;
				vec3 tl = texture2D ( envMap, uv ).rgb;
				uv.x += texelSize.x;
				vec3 tr = texture2D ( envMap, uv ).rgb;
				uv.y += texelSize.y;
				vec3 br = texture2D ( envMap, uv ).rgb;
				uv.x -= texelSize.x;
				vec3 bl = texture2D ( envMap, uv ).rgb;

				vec3 tm = mix( tl, tr, f.x );
				vec3 bm = mix( bl, br, f.x );
				gl_FragColor.rgb = mix( tm, bm, f.y );

			}
		`,
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
  return shaderMaterial;
}
function _getCubemapShader() {
  const shaderMaterial = new RawShaderMaterial({
    name: "CubemapToCubeUV",
    uniforms: {
      envMap: {value: null},
      flipEnvMap: {value: -1}
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: `

			precision mediump float;
			precision mediump int;

			uniform float flipEnvMap;

			varying vec3 vOutputDirection;

			uniform samplerCube envMap;

			void main() {

				gl_FragColor = textureCube( envMap, vec3( flipEnvMap * vOutputDirection.x, vOutputDirection.yz ) );

			}
		`,
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
  return shaderMaterial;
}
function _getCommonVertexShader() {
  return `

		precision mediump float;
		precision mediump int;

		attribute vec3 position;
		attribute vec2 uv;
		attribute float faceIndex;

		varying vec3 vOutputDirection;

		// RH coordinate system; PMREM face-indexing convention
		vec3 getDirection( vec2 uv, float face ) {

			uv = 2.0 * uv - 1.0;

			vec3 direction = vec3( uv, 1.0 );

			if ( face == 0.0 ) {

				direction = direction.zyx; // ( 1, v, u ) pos x

			} else if ( face == 1.0 ) {

				direction = direction.xzy;
				direction.xz *= -1.0; // ( -u, 1, -v ) pos y

			} else if ( face == 2.0 ) {

				direction.x *= -1.0; // ( -u, v, 1 ) pos z

			} else if ( face == 3.0 ) {

				direction = direction.zyx;
				direction.xz *= -1.0; // ( -1, v, -u ) neg x

			} else if ( face == 4.0 ) {

				direction = direction.xzy;
				direction.xy *= -1.0; // ( -u, -1, v ) neg y

			} else if ( face == 5.0 ) {

				direction.z *= -1.0; // ( u, v, -1 ) neg z

			}

			return direction;

		}

		void main() {

			vOutputDirection = getDirection( uv, faceIndex );
			gl_Position = vec4( position, 1.0 );

		}
	`;
}
function WebGLCubeUVMaps(renderer) {
  let cubeUVmaps = new WeakMap();
  let pmremGenerator = null;
  function get(texture) {
    if (texture && texture.isTexture) {
      const mapping = texture.mapping;
      const isEquirectMap = mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping;
      const isCubeMap = mapping === CubeReflectionMapping || mapping === CubeRefractionMapping;
      if (isEquirectMap || isCubeMap) {
        if (texture.isRenderTargetTexture && texture.needsPMREMUpdate === true) {
          texture.needsPMREMUpdate = false;
          let renderTarget = cubeUVmaps.get(texture);
          if (pmremGenerator === null)
            pmremGenerator = new PMREMGenerator(renderer);
          renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture, renderTarget) : pmremGenerator.fromCubemap(texture, renderTarget);
          cubeUVmaps.set(texture, renderTarget);
          return renderTarget.texture;
        } else {
          if (cubeUVmaps.has(texture)) {
            return cubeUVmaps.get(texture).texture;
          } else {
            const image = texture.image;
            if (isEquirectMap && image && image.height > 0 || isCubeMap && image && isCubeTextureComplete(image)) {
              if (pmremGenerator === null)
                pmremGenerator = new PMREMGenerator(renderer);
              const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture) : pmremGenerator.fromCubemap(texture);
              cubeUVmaps.set(texture, renderTarget);
              texture.addEventListener("dispose", onTextureDispose);
              return renderTarget.texture;
            } else {
              return null;
            }
          }
        }
      }
    }
    return texture;
  }
  function isCubeTextureComplete(image) {
    let count = 0;
    const length = 6;
    for (let i = 0; i < length; i++) {
      if (image[i] !== void 0)
        count++;
    }
    return count === length;
  }
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    const cubemapUV = cubeUVmaps.get(texture);
    if (cubemapUV !== void 0) {
      cubeUVmaps.delete(texture);
      cubemapUV.dispose();
    }
  }
  function dispose() {
    cubeUVmaps = new WeakMap();
    if (pmremGenerator !== null) {
      pmremGenerator.dispose();
      pmremGenerator = null;
    }
  }
  return {
    get,
    dispose
  };
}
function WebGLExtensions(gl) {
  const extensions = {};
  function getExtension(name) {
    if (extensions[name] !== void 0) {
      return extensions[name];
    }
    let extension;
    switch (name) {
      case "WEBGL_depth_texture":
        extension = gl.getExtension("WEBGL_depth_texture") || gl.getExtension("MOZ_WEBGL_depth_texture") || gl.getExtension("WEBKIT_WEBGL_depth_texture");
        break;
      case "EXT_texture_filter_anisotropic":
        extension = gl.getExtension("EXT_texture_filter_anisotropic") || gl.getExtension("MOZ_EXT_texture_filter_anisotropic") || gl.getExtension("WEBKIT_EXT_texture_filter_anisotropic");
        break;
      case "WEBGL_compressed_texture_s3tc":
        extension = gl.getExtension("WEBGL_compressed_texture_s3tc") || gl.getExtension("MOZ_WEBGL_compressed_texture_s3tc") || gl.getExtension("WEBKIT_WEBGL_compressed_texture_s3tc");
        break;
      case "WEBGL_compressed_texture_pvrtc":
        extension = gl.getExtension("WEBGL_compressed_texture_pvrtc") || gl.getExtension("WEBKIT_WEBGL_compressed_texture_pvrtc");
        break;
      default:
        extension = gl.getExtension(name);
    }
    extensions[name] = extension;
    return extension;
  }
  return {
    has: function(name) {
      return getExtension(name) !== null;
    },
    init: function(capabilities) {
      if (capabilities.isWebGL2) {
        getExtension("EXT_color_buffer_float");
      } else {
        getExtension("WEBGL_depth_texture");
        getExtension("OES_texture_float");
        getExtension("OES_texture_half_float");
        getExtension("OES_texture_half_float_linear");
        getExtension("OES_standard_derivatives");
        getExtension("OES_element_index_uint");
        getExtension("OES_vertex_array_object");
        getExtension("ANGLE_instanced_arrays");
      }
      getExtension("OES_texture_float_linear");
      getExtension("EXT_color_buffer_half_float");
      getExtension("WEBGL_multisampled_render_to_texture");
    },
    get: function(name) {
      const extension = getExtension(name);
      if (extension === null) {
        console.warn("THREE.WebGLRenderer: " + name + " extension not supported.");
      }
      return extension;
    }
  };
}
function WebGLGeometries(gl, attributes, info, bindingStates) {
  const geometries = {};
  const wireframeAttributes = new WeakMap();
  function onGeometryDispose(event) {
    const geometry = event.target;
    if (geometry.index !== null) {
      attributes.remove(geometry.index);
    }
    for (const name in geometry.attributes) {
      attributes.remove(geometry.attributes[name]);
    }
    geometry.removeEventListener("dispose", onGeometryDispose);
    delete geometries[geometry.id];
    const attribute = wireframeAttributes.get(geometry);
    if (attribute) {
      attributes.remove(attribute);
      wireframeAttributes.delete(geometry);
    }
    bindingStates.releaseStatesOfGeometry(geometry);
    if (geometry.isInstancedBufferGeometry === true) {
      delete geometry._maxInstanceCount;
    }
    info.memory.geometries--;
  }
  function get(object, geometry) {
    if (geometries[geometry.id] === true)
      return geometry;
    geometry.addEventListener("dispose", onGeometryDispose);
    geometries[geometry.id] = true;
    info.memory.geometries++;
    return geometry;
  }
  function update(geometry) {
    const geometryAttributes = geometry.attributes;
    for (const name in geometryAttributes) {
      attributes.update(geometryAttributes[name], 34962);
    }
    const morphAttributes = geometry.morphAttributes;
    for (const name in morphAttributes) {
      const array = morphAttributes[name];
      for (let i = 0, l = array.length; i < l; i++) {
        attributes.update(array[i], 34962);
      }
    }
  }
  function updateWireframeAttribute(geometry) {
    const indices = [];
    const geometryIndex = geometry.index;
    const geometryPosition = geometry.attributes.position;
    let version = 0;
    if (geometryIndex !== null) {
      const array = geometryIndex.array;
      version = geometryIndex.version;
      for (let i = 0, l = array.length; i < l; i += 3) {
        const a = array[i + 0];
        const b = array[i + 1];
        const c = array[i + 2];
        indices.push(a, b, b, c, c, a);
      }
    } else {
      const array = geometryPosition.array;
      version = geometryPosition.version;
      for (let i = 0, l = array.length / 3 - 1; i < l; i += 3) {
        const a = i + 0;
        const b = i + 1;
        const c = i + 2;
        indices.push(a, b, b, c, c, a);
      }
    }
    const attribute = new (arrayNeedsUint32(indices) ? Uint32BufferAttribute : Uint16BufferAttribute)(indices, 1);
    attribute.version = version;
    const previousAttribute = wireframeAttributes.get(geometry);
    if (previousAttribute)
      attributes.remove(previousAttribute);
    wireframeAttributes.set(geometry, attribute);
  }
  function getWireframeAttribute(geometry) {
    const currentAttribute = wireframeAttributes.get(geometry);
    if (currentAttribute) {
      const geometryIndex = geometry.index;
      if (geometryIndex !== null) {
        if (currentAttribute.version < geometryIndex.version) {
          updateWireframeAttribute(geometry);
        }
      }
    } else {
      updateWireframeAttribute(geometry);
    }
    return wireframeAttributes.get(geometry);
  }
  return {
    get,
    update,
    getWireframeAttribute
  };
}
function WebGLIndexedBufferRenderer(gl, extensions, info, capabilities) {
  const isWebGL2 = capabilities.isWebGL2;
  let mode;
  function setMode(value) {
    mode = value;
  }
  let type, bytesPerElement;
  function setIndex(value) {
    type = value.type;
    bytesPerElement = value.bytesPerElement;
  }
  function render(start, count) {
    gl.drawElements(mode, count, type, start * bytesPerElement);
    info.update(count, mode, 1);
  }
  function renderInstances(start, count, primcount) {
    if (primcount === 0)
      return;
    let extension, methodName;
    if (isWebGL2) {
      extension = gl;
      methodName = "drawElementsInstanced";
    } else {
      extension = extensions.get("ANGLE_instanced_arrays");
      methodName = "drawElementsInstancedANGLE";
      if (extension === null) {
        console.error("THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.");
        return;
      }
    }
    extension[methodName](mode, count, type, start * bytesPerElement, primcount);
    info.update(count, mode, primcount);
  }
  this.setMode = setMode;
  this.setIndex = setIndex;
  this.render = render;
  this.renderInstances = renderInstances;
}
function WebGLInfo(gl) {
  const memory = {
    geometries: 0,
    textures: 0
  };
  const render = {
    frame: 0,
    calls: 0,
    triangles: 0,
    points: 0,
    lines: 0
  };
  function update(count, mode, instanceCount) {
    render.calls++;
    switch (mode) {
      case 4:
        render.triangles += instanceCount * (count / 3);
        break;
      case 1:
        render.lines += instanceCount * (count / 2);
        break;
      case 3:
        render.lines += instanceCount * (count - 1);
        break;
      case 2:
        render.lines += instanceCount * count;
        break;
      case 0:
        render.points += instanceCount * count;
        break;
      default:
        console.error("THREE.WebGLInfo: Unknown draw mode:", mode);
        break;
    }
  }
  function reset() {
    render.frame++;
    render.calls = 0;
    render.triangles = 0;
    render.points = 0;
    render.lines = 0;
  }
  return {
    memory,
    render,
    programs: null,
    autoReset: true,
    reset,
    update
  };
}
class DataTexture2DArray extends Texture {
  constructor(data = null, width = 1, height = 1, depth = 1) {
    super(null);
    this.image = {data, width, height, depth};
    this.magFilter = NearestFilter;
    this.minFilter = NearestFilter;
    this.wrapR = ClampToEdgeWrapping;
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
  }
}
DataTexture2DArray.prototype.isDataTexture2DArray = true;
function numericalSort(a, b) {
  return a[0] - b[0];
}
function absNumericalSort(a, b) {
  return Math.abs(b[1]) - Math.abs(a[1]);
}
function denormalize(morph, attribute) {
  let denominator = 1;
  const array = attribute.isInterleavedBufferAttribute ? attribute.data.array : attribute.array;
  if (array instanceof Int8Array)
    denominator = 127;
  else if (array instanceof Int16Array)
    denominator = 32767;
  else if (array instanceof Int32Array)
    denominator = 2147483647;
  else
    console.error("THREE.WebGLMorphtargets: Unsupported morph attribute data type: ", array);
  morph.divideScalar(denominator);
}
function WebGLMorphtargets(gl, capabilities, textures) {
  const influencesList = {};
  const morphInfluences = new Float32Array(8);
  const morphTextures = new WeakMap();
  const morph = new Vector3$1();
  const workInfluences = [];
  for (let i = 0; i < 8; i++) {
    workInfluences[i] = [i, 0];
  }
  function update(object, geometry, material, program) {
    const objectInfluences = object.morphTargetInfluences;
    if (capabilities.isWebGL2 === true) {
      const numberOfMorphTargets = geometry.morphAttributes.position.length;
      let entry = morphTextures.get(geometry);
      if (entry === void 0 || entry.count !== numberOfMorphTargets) {
        if (entry !== void 0)
          entry.texture.dispose();
        const hasMorphNormals = geometry.morphAttributes.normal !== void 0;
        const morphTargets = geometry.morphAttributes.position;
        const morphNormals = geometry.morphAttributes.normal || [];
        const numberOfVertices = geometry.attributes.position.count;
        const numberOfVertexData = hasMorphNormals === true ? 2 : 1;
        let width = numberOfVertices * numberOfVertexData;
        let height = 1;
        if (width > capabilities.maxTextureSize) {
          height = Math.ceil(width / capabilities.maxTextureSize);
          width = capabilities.maxTextureSize;
        }
        const buffer = new Float32Array(width * height * 4 * numberOfMorphTargets);
        const texture = new DataTexture2DArray(buffer, width, height, numberOfMorphTargets);
        texture.format = RGBAFormat;
        texture.type = FloatType;
        texture.needsUpdate = true;
        const vertexDataStride = numberOfVertexData * 4;
        for (let i = 0; i < numberOfMorphTargets; i++) {
          const morphTarget = morphTargets[i];
          const morphNormal = morphNormals[i];
          const offset = width * height * 4 * i;
          for (let j = 0; j < morphTarget.count; j++) {
            morph.fromBufferAttribute(morphTarget, j);
            if (morphTarget.normalized === true)
              denormalize(morph, morphTarget);
            const stride = j * vertexDataStride;
            buffer[offset + stride + 0] = morph.x;
            buffer[offset + stride + 1] = morph.y;
            buffer[offset + stride + 2] = morph.z;
            buffer[offset + stride + 3] = 0;
            if (hasMorphNormals === true) {
              morph.fromBufferAttribute(morphNormal, j);
              if (morphNormal.normalized === true)
                denormalize(morph, morphNormal);
              buffer[offset + stride + 4] = morph.x;
              buffer[offset + stride + 5] = morph.y;
              buffer[offset + stride + 6] = morph.z;
              buffer[offset + stride + 7] = 0;
            }
          }
        }
        entry = {
          count: numberOfMorphTargets,
          texture,
          size: new Vector2$1(width, height)
        };
        morphTextures.set(geometry, entry);
        function disposeTexture() {
          texture.dispose();
          morphTextures.delete(geometry);
          geometry.removeEventListener("dispose", disposeTexture);
        }
        geometry.addEventListener("dispose", disposeTexture);
      }
      let morphInfluencesSum = 0;
      for (let i = 0; i < objectInfluences.length; i++) {
        morphInfluencesSum += objectInfluences[i];
      }
      const morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
      program.getUniforms().setValue(gl, "morphTargetBaseInfluence", morphBaseInfluence);
      program.getUniforms().setValue(gl, "morphTargetInfluences", objectInfluences);
      program.getUniforms().setValue(gl, "morphTargetsTexture", entry.texture, textures);
      program.getUniforms().setValue(gl, "morphTargetsTextureSize", entry.size);
    } else {
      const length = objectInfluences === void 0 ? 0 : objectInfluences.length;
      let influences = influencesList[geometry.id];
      if (influences === void 0 || influences.length !== length) {
        influences = [];
        for (let i = 0; i < length; i++) {
          influences[i] = [i, 0];
        }
        influencesList[geometry.id] = influences;
      }
      for (let i = 0; i < length; i++) {
        const influence = influences[i];
        influence[0] = i;
        influence[1] = objectInfluences[i];
      }
      influences.sort(absNumericalSort);
      for (let i = 0; i < 8; i++) {
        if (i < length && influences[i][1]) {
          workInfluences[i][0] = influences[i][0];
          workInfluences[i][1] = influences[i][1];
        } else {
          workInfluences[i][0] = Number.MAX_SAFE_INTEGER;
          workInfluences[i][1] = 0;
        }
      }
      workInfluences.sort(numericalSort);
      const morphTargets = geometry.morphAttributes.position;
      const morphNormals = geometry.morphAttributes.normal;
      let morphInfluencesSum = 0;
      for (let i = 0; i < 8; i++) {
        const influence = workInfluences[i];
        const index = influence[0];
        const value = influence[1];
        if (index !== Number.MAX_SAFE_INTEGER && value) {
          if (morphTargets && geometry.getAttribute("morphTarget" + i) !== morphTargets[index]) {
            geometry.setAttribute("morphTarget" + i, morphTargets[index]);
          }
          if (morphNormals && geometry.getAttribute("morphNormal" + i) !== morphNormals[index]) {
            geometry.setAttribute("morphNormal" + i, morphNormals[index]);
          }
          morphInfluences[i] = value;
          morphInfluencesSum += value;
        } else {
          if (morphTargets && geometry.hasAttribute("morphTarget" + i) === true) {
            geometry.deleteAttribute("morphTarget" + i);
          }
          if (morphNormals && geometry.hasAttribute("morphNormal" + i) === true) {
            geometry.deleteAttribute("morphNormal" + i);
          }
          morphInfluences[i] = 0;
        }
      }
      const morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
      program.getUniforms().setValue(gl, "morphTargetBaseInfluence", morphBaseInfluence);
      program.getUniforms().setValue(gl, "morphTargetInfluences", morphInfluences);
    }
  }
  return {
    update
  };
}
function WebGLObjects(gl, geometries, attributes, info) {
  let updateMap = new WeakMap();
  function update(object) {
    const frame = info.render.frame;
    const geometry = object.geometry;
    const buffergeometry = geometries.get(object, geometry);
    if (updateMap.get(buffergeometry) !== frame) {
      geometries.update(buffergeometry);
      updateMap.set(buffergeometry, frame);
    }
    if (object.isInstancedMesh) {
      if (object.hasEventListener("dispose", onInstancedMeshDispose) === false) {
        object.addEventListener("dispose", onInstancedMeshDispose);
      }
      attributes.update(object.instanceMatrix, 34962);
      if (object.instanceColor !== null) {
        attributes.update(object.instanceColor, 34962);
      }
    }
    return buffergeometry;
  }
  function dispose() {
    updateMap = new WeakMap();
  }
  function onInstancedMeshDispose(event) {
    const instancedMesh = event.target;
    instancedMesh.removeEventListener("dispose", onInstancedMeshDispose);
    attributes.remove(instancedMesh.instanceMatrix);
    if (instancedMesh.instanceColor !== null)
      attributes.remove(instancedMesh.instanceColor);
  }
  return {
    update,
    dispose
  };
}
class DataTexture3D extends Texture {
  constructor(data = null, width = 1, height = 1, depth = 1) {
    super(null);
    this.image = {data, width, height, depth};
    this.magFilter = NearestFilter;
    this.minFilter = NearestFilter;
    this.wrapR = ClampToEdgeWrapping;
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
  }
}
DataTexture3D.prototype.isDataTexture3D = true;
const emptyTexture = new Texture();
const emptyTexture2dArray = new DataTexture2DArray();
const emptyTexture3d = new DataTexture3D();
const emptyCubeTexture = new CubeTexture();
const arrayCacheF32 = [];
const arrayCacheI32 = [];
const mat4array = new Float32Array(16);
const mat3array = new Float32Array(9);
const mat2array = new Float32Array(4);
function flatten(array, nBlocks, blockSize) {
  const firstElem = array[0];
  if (firstElem <= 0 || firstElem > 0)
    return array;
  const n = nBlocks * blockSize;
  let r = arrayCacheF32[n];
  if (r === void 0) {
    r = new Float32Array(n);
    arrayCacheF32[n] = r;
  }
  if (nBlocks !== 0) {
    firstElem.toArray(r, 0);
    for (let i = 1, offset = 0; i !== nBlocks; ++i) {
      offset += blockSize;
      array[i].toArray(r, offset);
    }
  }
  return r;
}
function arraysEqual(a, b) {
  if (a.length !== b.length)
    return false;
  for (let i = 0, l = a.length; i < l; i++) {
    if (a[i] !== b[i])
      return false;
  }
  return true;
}
function copyArray(a, b) {
  for (let i = 0, l = b.length; i < l; i++) {
    a[i] = b[i];
  }
}
function allocTexUnits(textures, n) {
  let r = arrayCacheI32[n];
  if (r === void 0) {
    r = new Int32Array(n);
    arrayCacheI32[n] = r;
  }
  for (let i = 0; i !== n; ++i) {
    r[i] = textures.allocateTextureUnit();
  }
  return r;
}
function setValueV1f(gl, v) {
  const cache = this.cache;
  if (cache[0] === v)
    return;
  gl.uniform1f(this.addr, v);
  cache[0] = v;
}
function setValueV2f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2f(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v))
      return;
    gl.uniform2fv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV3f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3f(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else if (v.r !== void 0) {
    if (cache[0] !== v.r || cache[1] !== v.g || cache[2] !== v.b) {
      gl.uniform3f(this.addr, v.r, v.g, v.b);
      cache[0] = v.r;
      cache[1] = v.g;
      cache[2] = v.b;
    }
  } else {
    if (arraysEqual(cache, v))
      return;
    gl.uniform3fv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV4f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4f(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v))
      return;
    gl.uniform4fv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueM2(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v))
      return;
    gl.uniformMatrix2fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements))
      return;
    mat2array.set(elements);
    gl.uniformMatrix2fv(this.addr, false, mat2array);
    copyArray(cache, elements);
  }
}
function setValueM3(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v))
      return;
    gl.uniformMatrix3fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements))
      return;
    mat3array.set(elements);
    gl.uniformMatrix3fv(this.addr, false, mat3array);
    copyArray(cache, elements);
  }
}
function setValueM4(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v))
      return;
    gl.uniformMatrix4fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements))
      return;
    mat4array.set(elements);
    gl.uniformMatrix4fv(this.addr, false, mat4array);
    copyArray(cache, elements);
  }
}
function setValueV1i(gl, v) {
  const cache = this.cache;
  if (cache[0] === v)
    return;
  gl.uniform1i(this.addr, v);
  cache[0] = v;
}
function setValueV2i(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform2iv(this.addr, v);
  copyArray(cache, v);
}
function setValueV3i(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform3iv(this.addr, v);
  copyArray(cache, v);
}
function setValueV4i(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform4iv(this.addr, v);
  copyArray(cache, v);
}
function setValueV1ui(gl, v) {
  const cache = this.cache;
  if (cache[0] === v)
    return;
  gl.uniform1ui(this.addr, v);
  cache[0] = v;
}
function setValueV2ui(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform2uiv(this.addr, v);
  copyArray(cache, v);
}
function setValueV3ui(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform3uiv(this.addr, v);
  copyArray(cache, v);
}
function setValueV4ui(gl, v) {
  const cache = this.cache;
  if (arraysEqual(cache, v))
    return;
  gl.uniform4uiv(this.addr, v);
  copyArray(cache, v);
}
function setValueT1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.safeSetTexture2D(v || emptyTexture, unit);
}
function setValueT3D1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture3D(v || emptyTexture3d, unit);
}
function setValueT6(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.safeSetTextureCube(v || emptyCubeTexture, unit);
}
function setValueT2DArray1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture2DArray(v || emptyTexture2dArray, unit);
}
function getSingularSetter(type) {
  switch (type) {
    case 5126:
      return setValueV1f;
    case 35664:
      return setValueV2f;
    case 35665:
      return setValueV3f;
    case 35666:
      return setValueV4f;
    case 35674:
      return setValueM2;
    case 35675:
      return setValueM3;
    case 35676:
      return setValueM4;
    case 5124:
    case 35670:
      return setValueV1i;
    case 35667:
    case 35671:
      return setValueV2i;
    case 35668:
    case 35672:
      return setValueV3i;
    case 35669:
    case 35673:
      return setValueV4i;
    case 5125:
      return setValueV1ui;
    case 36294:
      return setValueV2ui;
    case 36295:
      return setValueV3ui;
    case 36296:
      return setValueV4ui;
    case 35678:
    case 36198:
    case 36298:
    case 36306:
    case 35682:
      return setValueT1;
    case 35679:
    case 36299:
    case 36307:
      return setValueT3D1;
    case 35680:
    case 36300:
    case 36308:
    case 36293:
      return setValueT6;
    case 36289:
    case 36303:
    case 36311:
    case 36292:
      return setValueT2DArray1;
  }
}
function setValueV1fArray(gl, v) {
  gl.uniform1fv(this.addr, v);
}
function setValueV2fArray(gl, v) {
  const data = flatten(v, this.size, 2);
  gl.uniform2fv(this.addr, data);
}
function setValueV3fArray(gl, v) {
  const data = flatten(v, this.size, 3);
  gl.uniform3fv(this.addr, data);
}
function setValueV4fArray(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniform4fv(this.addr, data);
}
function setValueM2Array(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniformMatrix2fv(this.addr, false, data);
}
function setValueM3Array(gl, v) {
  const data = flatten(v, this.size, 9);
  gl.uniformMatrix3fv(this.addr, false, data);
}
function setValueM4Array(gl, v) {
  const data = flatten(v, this.size, 16);
  gl.uniformMatrix4fv(this.addr, false, data);
}
function setValueV1iArray(gl, v) {
  gl.uniform1iv(this.addr, v);
}
function setValueV2iArray(gl, v) {
  gl.uniform2iv(this.addr, v);
}
function setValueV3iArray(gl, v) {
  gl.uniform3iv(this.addr, v);
}
function setValueV4iArray(gl, v) {
  gl.uniform4iv(this.addr, v);
}
function setValueV1uiArray(gl, v) {
  gl.uniform1uiv(this.addr, v);
}
function setValueV2uiArray(gl, v) {
  gl.uniform2uiv(this.addr, v);
}
function setValueV3uiArray(gl, v) {
  gl.uniform3uiv(this.addr, v);
}
function setValueV4uiArray(gl, v) {
  gl.uniform4uiv(this.addr, v);
}
function setValueT1Array(gl, v, textures) {
  const n = v.length;
  const units = allocTexUnits(textures, n);
  gl.uniform1iv(this.addr, units);
  for (let i = 0; i !== n; ++i) {
    textures.safeSetTexture2D(v[i] || emptyTexture, units[i]);
  }
}
function setValueT3DArray(gl, v, textures) {
  const n = v.length;
  const units = allocTexUnits(textures, n);
  gl.uniform1iv(this.addr, units);
  for (let i = 0; i !== n; ++i) {
    textures.setTexture3D(v[i] || emptyTexture3d, units[i]);
  }
}
function setValueT6Array(gl, v, textures) {
  const n = v.length;
  const units = allocTexUnits(textures, n);
  gl.uniform1iv(this.addr, units);
  for (let i = 0; i !== n; ++i) {
    textures.safeSetTextureCube(v[i] || emptyCubeTexture, units[i]);
  }
}
function setValueT2DArrayArray(gl, v, textures) {
  const n = v.length;
  const units = allocTexUnits(textures, n);
  gl.uniform1iv(this.addr, units);
  for (let i = 0; i !== n; ++i) {
    textures.setTexture2DArray(v[i] || emptyTexture2dArray, units[i]);
  }
}
function getPureArraySetter(type) {
  switch (type) {
    case 5126:
      return setValueV1fArray;
    case 35664:
      return setValueV2fArray;
    case 35665:
      return setValueV3fArray;
    case 35666:
      return setValueV4fArray;
    case 35674:
      return setValueM2Array;
    case 35675:
      return setValueM3Array;
    case 35676:
      return setValueM4Array;
    case 5124:
    case 35670:
      return setValueV1iArray;
    case 35667:
    case 35671:
      return setValueV2iArray;
    case 35668:
    case 35672:
      return setValueV3iArray;
    case 35669:
    case 35673:
      return setValueV4iArray;
    case 5125:
      return setValueV1uiArray;
    case 36294:
      return setValueV2uiArray;
    case 36295:
      return setValueV3uiArray;
    case 36296:
      return setValueV4uiArray;
    case 35678:
    case 36198:
    case 36298:
    case 36306:
    case 35682:
      return setValueT1Array;
    case 35679:
    case 36299:
    case 36307:
      return setValueT3DArray;
    case 35680:
    case 36300:
    case 36308:
    case 36293:
      return setValueT6Array;
    case 36289:
    case 36303:
    case 36311:
    case 36292:
      return setValueT2DArrayArray;
  }
}
function SingleUniform(id, activeInfo, addr) {
  this.id = id;
  this.addr = addr;
  this.cache = [];
  this.setValue = getSingularSetter(activeInfo.type);
}
function PureArrayUniform(id, activeInfo, addr) {
  this.id = id;
  this.addr = addr;
  this.cache = [];
  this.size = activeInfo.size;
  this.setValue = getPureArraySetter(activeInfo.type);
}
PureArrayUniform.prototype.updateCache = function(data) {
  const cache = this.cache;
  if (data instanceof Float32Array && cache.length !== data.length) {
    this.cache = new Float32Array(data.length);
  }
  copyArray(cache, data);
};
function StructuredUniform(id) {
  this.id = id;
  this.seq = [];
  this.map = {};
}
StructuredUniform.prototype.setValue = function(gl, value, textures) {
  const seq = this.seq;
  for (let i = 0, n = seq.length; i !== n; ++i) {
    const u = seq[i];
    u.setValue(gl, value[u.id], textures);
  }
};
const RePathPart = /(\w+)(\])?(\[|\.)?/g;
function addUniform(container, uniformObject) {
  container.seq.push(uniformObject);
  container.map[uniformObject.id] = uniformObject;
}
function parseUniform(activeInfo, addr, container) {
  const path = activeInfo.name, pathLength = path.length;
  RePathPart.lastIndex = 0;
  while (true) {
    const match = RePathPart.exec(path), matchEnd = RePathPart.lastIndex;
    let id = match[1];
    const idIsIndex = match[2] === "]", subscript = match[3];
    if (idIsIndex)
      id = id | 0;
    if (subscript === void 0 || subscript === "[" && matchEnd + 2 === pathLength) {
      addUniform(container, subscript === void 0 ? new SingleUniform(id, activeInfo, addr) : new PureArrayUniform(id, activeInfo, addr));
      break;
    } else {
      const map = container.map;
      let next = map[id];
      if (next === void 0) {
        next = new StructuredUniform(id);
        addUniform(container, next);
      }
      container = next;
    }
  }
}
function WebGLUniforms(gl, program) {
  this.seq = [];
  this.map = {};
  const n = gl.getProgramParameter(program, 35718);
  for (let i = 0; i < n; ++i) {
    const info = gl.getActiveUniform(program, i), addr = gl.getUniformLocation(program, info.name);
    parseUniform(info, addr, this);
  }
}
WebGLUniforms.prototype.setValue = function(gl, name, value, textures) {
  const u = this.map[name];
  if (u !== void 0)
    u.setValue(gl, value, textures);
};
WebGLUniforms.prototype.setOptional = function(gl, object, name) {
  const v = object[name];
  if (v !== void 0)
    this.setValue(gl, name, v);
};
WebGLUniforms.upload = function(gl, seq, values, textures) {
  for (let i = 0, n = seq.length; i !== n; ++i) {
    const u = seq[i], v = values[u.id];
    if (v.needsUpdate !== false) {
      u.setValue(gl, v.value, textures);
    }
  }
};
WebGLUniforms.seqWithValue = function(seq, values) {
  const r = [];
  for (let i = 0, n = seq.length; i !== n; ++i) {
    const u = seq[i];
    if (u.id in values)
      r.push(u);
  }
  return r;
};
function WebGLShader(gl, type, string) {
  const shader = gl.createShader(type);
  gl.shaderSource(shader, string);
  gl.compileShader(shader);
  return shader;
}
let programIdCount = 0;
function addLineNumbers(string) {
  const lines = string.split("\n");
  for (let i = 0; i < lines.length; i++) {
    lines[i] = i + 1 + ": " + lines[i];
  }
  return lines.join("\n");
}
function getEncodingComponents(encoding) {
  switch (encoding) {
    case LinearEncoding:
      return ["Linear", "( value )"];
    case sRGBEncoding:
      return ["sRGB", "( value )"];
    default:
      console.warn("THREE.WebGLProgram: Unsupported encoding:", encoding);
      return ["Linear", "( value )"];
  }
}
function getShaderErrors(gl, shader, type) {
  const status = gl.getShaderParameter(shader, 35713);
  const errors = gl.getShaderInfoLog(shader).trim();
  if (status && errors === "")
    return "";
  return type.toUpperCase() + "\n\n" + errors + "\n\n" + addLineNumbers(gl.getShaderSource(shader));
}
function getTexelEncodingFunction(functionName, encoding) {
  const components = getEncodingComponents(encoding);
  return "vec4 " + functionName + "( vec4 value ) { return LinearTo" + components[0] + components[1] + "; }";
}
function getToneMappingFunction(functionName, toneMapping) {
  let toneMappingName;
  switch (toneMapping) {
    case LinearToneMapping:
      toneMappingName = "Linear";
      break;
    case ReinhardToneMapping:
      toneMappingName = "Reinhard";
      break;
    case CineonToneMapping:
      toneMappingName = "OptimizedCineon";
      break;
    case ACESFilmicToneMapping:
      toneMappingName = "ACESFilmic";
      break;
    case CustomToneMapping:
      toneMappingName = "Custom";
      break;
    default:
      console.warn("THREE.WebGLProgram: Unsupported toneMapping:", toneMapping);
      toneMappingName = "Linear";
  }
  return "vec3 " + functionName + "( vec3 color ) { return " + toneMappingName + "ToneMapping( color ); }";
}
function generateExtensions(parameters) {
  const chunks = [
    parameters.extensionDerivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === "physical" ? "#extension GL_OES_standard_derivatives : enable" : "",
    (parameters.extensionFragDepth || parameters.logarithmicDepthBuffer) && parameters.rendererExtensionFragDepth ? "#extension GL_EXT_frag_depth : enable" : "",
    parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ? "#extension GL_EXT_draw_buffers : require" : "",
    (parameters.extensionShaderTextureLOD || parameters.envMap || parameters.transmission) && parameters.rendererExtensionShaderTextureLod ? "#extension GL_EXT_shader_texture_lod : enable" : ""
  ];
  return chunks.filter(filterEmptyLine).join("\n");
}
function generateDefines(defines) {
  const chunks = [];
  for (const name in defines) {
    const value = defines[name];
    if (value === false)
      continue;
    chunks.push("#define " + name + " " + value);
  }
  return chunks.join("\n");
}
function fetchAttributeLocations(gl, program) {
  const attributes = {};
  const n = gl.getProgramParameter(program, 35721);
  for (let i = 0; i < n; i++) {
    const info = gl.getActiveAttrib(program, i);
    const name = info.name;
    let locationSize = 1;
    if (info.type === 35674)
      locationSize = 2;
    if (info.type === 35675)
      locationSize = 3;
    if (info.type === 35676)
      locationSize = 4;
    attributes[name] = {
      type: info.type,
      location: gl.getAttribLocation(program, name),
      locationSize
    };
  }
  return attributes;
}
function filterEmptyLine(string) {
  return string !== "";
}
function replaceLightNums(string, parameters) {
  return string.replace(/NUM_DIR_LIGHTS/g, parameters.numDirLights).replace(/NUM_SPOT_LIGHTS/g, parameters.numSpotLights).replace(/NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights).replace(/NUM_POINT_LIGHTS/g, parameters.numPointLights).replace(/NUM_HEMI_LIGHTS/g, parameters.numHemiLights).replace(/NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows).replace(/NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows).replace(/NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows);
}
function replaceClippingPlaneNums(string, parameters) {
  return string.replace(/NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes).replace(/UNION_CLIPPING_PLANES/g, parameters.numClippingPlanes - parameters.numClipIntersection);
}
const includePattern = /^[ \t]*#include +<([\w\d./]+)>/gm;
function resolveIncludes(string) {
  return string.replace(includePattern, includeReplacer);
}
function includeReplacer(match, include) {
  const string = ShaderChunk[include];
  if (string === void 0) {
    throw new Error("Can not resolve #include <" + include + ">");
  }
  return resolveIncludes(string);
}
const deprecatedUnrollLoopPattern = /#pragma unroll_loop[\s]+?for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;
const unrollLoopPattern = /#pragma unroll_loop_start\s+for\s*\(\s*int\s+i\s*=\s*(\d+)\s*;\s*i\s*<\s*(\d+)\s*;\s*i\s*\+\+\s*\)\s*{([\s\S]+?)}\s+#pragma unroll_loop_end/g;
function unrollLoops(string) {
  return string.replace(unrollLoopPattern, loopReplacer).replace(deprecatedUnrollLoopPattern, deprecatedLoopReplacer);
}
function deprecatedLoopReplacer(match, start, end, snippet) {
  console.warn("WebGLProgram: #pragma unroll_loop shader syntax is deprecated. Please use #pragma unroll_loop_start syntax instead.");
  return loopReplacer(match, start, end, snippet);
}
function loopReplacer(match, start, end, snippet) {
  let string = "";
  for (let i = parseInt(start); i < parseInt(end); i++) {
    string += snippet.replace(/\[\s*i\s*\]/g, "[ " + i + " ]").replace(/UNROLLED_LOOP_INDEX/g, i);
  }
  return string;
}
function generatePrecision(parameters) {
  let precisionstring = "precision " + parameters.precision + " float;\nprecision " + parameters.precision + " int;";
  if (parameters.precision === "highp") {
    precisionstring += "\n#define HIGH_PRECISION";
  } else if (parameters.precision === "mediump") {
    precisionstring += "\n#define MEDIUM_PRECISION";
  } else if (parameters.precision === "lowp") {
    precisionstring += "\n#define LOW_PRECISION";
  }
  return precisionstring;
}
function generateShadowMapTypeDefine(parameters) {
  let shadowMapTypeDefine = "SHADOWMAP_TYPE_BASIC";
  if (parameters.shadowMapType === PCFShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_PCF";
  } else if (parameters.shadowMapType === PCFSoftShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_PCF_SOFT";
  } else if (parameters.shadowMapType === VSMShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_VSM";
  }
  return shadowMapTypeDefine;
}
function generateEnvMapTypeDefine(parameters) {
  let envMapTypeDefine = "ENVMAP_TYPE_CUBE";
  if (parameters.envMap) {
    switch (parameters.envMapMode) {
      case CubeReflectionMapping:
      case CubeRefractionMapping:
        envMapTypeDefine = "ENVMAP_TYPE_CUBE";
        break;
      case CubeUVReflectionMapping:
      case CubeUVRefractionMapping:
        envMapTypeDefine = "ENVMAP_TYPE_CUBE_UV";
        break;
    }
  }
  return envMapTypeDefine;
}
function generateEnvMapModeDefine(parameters) {
  let envMapModeDefine = "ENVMAP_MODE_REFLECTION";
  if (parameters.envMap) {
    switch (parameters.envMapMode) {
      case CubeRefractionMapping:
      case CubeUVRefractionMapping:
        envMapModeDefine = "ENVMAP_MODE_REFRACTION";
        break;
    }
  }
  return envMapModeDefine;
}
function generateEnvMapBlendingDefine(parameters) {
  let envMapBlendingDefine = "ENVMAP_BLENDING_NONE";
  if (parameters.envMap) {
    switch (parameters.combine) {
      case MultiplyOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_MULTIPLY";
        break;
      case MixOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_MIX";
        break;
      case AddOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_ADD";
        break;
    }
  }
  return envMapBlendingDefine;
}
function WebGLProgram(renderer, cacheKey, parameters, bindingStates) {
  const gl = renderer.getContext();
  const defines = parameters.defines;
  let vertexShader = parameters.vertexShader;
  let fragmentShader = parameters.fragmentShader;
  const shadowMapTypeDefine = generateShadowMapTypeDefine(parameters);
  const envMapTypeDefine = generateEnvMapTypeDefine(parameters);
  const envMapModeDefine = generateEnvMapModeDefine(parameters);
  const envMapBlendingDefine = generateEnvMapBlendingDefine(parameters);
  const customExtensions = parameters.isWebGL2 ? "" : generateExtensions(parameters);
  const customDefines = generateDefines(defines);
  const program = gl.createProgram();
  let prefixVertex, prefixFragment;
  let versionString = parameters.glslVersion ? "#version " + parameters.glslVersion + "\n" : "";
  if (parameters.isRawShaderMaterial) {
    prefixVertex = [
      customDefines
    ].filter(filterEmptyLine).join("\n");
    if (prefixVertex.length > 0) {
      prefixVertex += "\n";
    }
    prefixFragment = [
      customExtensions,
      customDefines
    ].filter(filterEmptyLine).join("\n");
    if (prefixFragment.length > 0) {
      prefixFragment += "\n";
    }
  } else {
    prefixVertex = [
      generatePrecision(parameters),
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines,
      parameters.instancing ? "#define USE_INSTANCING" : "",
      parameters.instancingColor ? "#define USE_INSTANCING_COLOR" : "",
      parameters.supportsVertexTextures ? "#define VERTEX_TEXTURES" : "",
      "#define MAX_BONES " + parameters.maxBones,
      parameters.useFog && parameters.fog ? "#define USE_FOG" : "",
      parameters.useFog && parameters.fogExp2 ? "#define FOG_EXP2" : "",
      parameters.map ? "#define USE_MAP" : "",
      parameters.envMap ? "#define USE_ENVMAP" : "",
      parameters.envMap ? "#define " + envMapModeDefine : "",
      parameters.lightMap ? "#define USE_LIGHTMAP" : "",
      parameters.aoMap ? "#define USE_AOMAP" : "",
      parameters.emissiveMap ? "#define USE_EMISSIVEMAP" : "",
      parameters.bumpMap ? "#define USE_BUMPMAP" : "",
      parameters.normalMap ? "#define USE_NORMALMAP" : "",
      parameters.normalMap && parameters.objectSpaceNormalMap ? "#define OBJECTSPACE_NORMALMAP" : "",
      parameters.normalMap && parameters.tangentSpaceNormalMap ? "#define TANGENTSPACE_NORMALMAP" : "",
      parameters.clearcoatMap ? "#define USE_CLEARCOATMAP" : "",
      parameters.clearcoatRoughnessMap ? "#define USE_CLEARCOAT_ROUGHNESSMAP" : "",
      parameters.clearcoatNormalMap ? "#define USE_CLEARCOAT_NORMALMAP" : "",
      parameters.displacementMap && parameters.supportsVertexTextures ? "#define USE_DISPLACEMENTMAP" : "",
      parameters.specularMap ? "#define USE_SPECULARMAP" : "",
      parameters.specularIntensityMap ? "#define USE_SPECULARINTENSITYMAP" : "",
      parameters.specularColorMap ? "#define USE_SPECULARCOLORMAP" : "",
      parameters.roughnessMap ? "#define USE_ROUGHNESSMAP" : "",
      parameters.metalnessMap ? "#define USE_METALNESSMAP" : "",
      parameters.alphaMap ? "#define USE_ALPHAMAP" : "",
      parameters.transmission ? "#define USE_TRANSMISSION" : "",
      parameters.transmissionMap ? "#define USE_TRANSMISSIONMAP" : "",
      parameters.thicknessMap ? "#define USE_THICKNESSMAP" : "",
      parameters.sheenColorMap ? "#define USE_SHEENCOLORMAP" : "",
      parameters.sheenRoughnessMap ? "#define USE_SHEENROUGHNESSMAP" : "",
      parameters.vertexTangents ? "#define USE_TANGENT" : "",
      parameters.vertexColors ? "#define USE_COLOR" : "",
      parameters.vertexAlphas ? "#define USE_COLOR_ALPHA" : "",
      parameters.vertexUvs ? "#define USE_UV" : "",
      parameters.uvsVertexOnly ? "#define UVS_VERTEX_ONLY" : "",
      parameters.flatShading ? "#define FLAT_SHADED" : "",
      parameters.skinning ? "#define USE_SKINNING" : "",
      parameters.useVertexTexture ? "#define BONE_TEXTURE" : "",
      parameters.morphTargets ? "#define USE_MORPHTARGETS" : "",
      parameters.morphNormals && parameters.flatShading === false ? "#define USE_MORPHNORMALS" : "",
      parameters.morphTargets && parameters.isWebGL2 ? "#define MORPHTARGETS_TEXTURE" : "",
      parameters.morphTargets && parameters.isWebGL2 ? "#define MORPHTARGETS_COUNT " + parameters.morphTargetsCount : "",
      parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
      parameters.flipSided ? "#define FLIP_SIDED" : "",
      parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
      parameters.shadowMapEnabled ? "#define " + shadowMapTypeDefine : "",
      parameters.sizeAttenuation ? "#define USE_SIZEATTENUATION" : "",
      parameters.logarithmicDepthBuffer ? "#define USE_LOGDEPTHBUF" : "",
      parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? "#define USE_LOGDEPTHBUF_EXT" : "",
      "uniform mat4 modelMatrix;",
      "uniform mat4 modelViewMatrix;",
      "uniform mat4 projectionMatrix;",
      "uniform mat4 viewMatrix;",
      "uniform mat3 normalMatrix;",
      "uniform vec3 cameraPosition;",
      "uniform bool isOrthographic;",
      "#ifdef USE_INSTANCING",
      "	attribute mat4 instanceMatrix;",
      "#endif",
      "#ifdef USE_INSTANCING_COLOR",
      "	attribute vec3 instanceColor;",
      "#endif",
      "attribute vec3 position;",
      "attribute vec3 normal;",
      "attribute vec2 uv;",
      "#ifdef USE_TANGENT",
      "	attribute vec4 tangent;",
      "#endif",
      "#if defined( USE_COLOR_ALPHA )",
      "	attribute vec4 color;",
      "#elif defined( USE_COLOR )",
      "	attribute vec3 color;",
      "#endif",
      "#if ( defined( USE_MORPHTARGETS ) && ! defined( MORPHTARGETS_TEXTURE ) )",
      "	attribute vec3 morphTarget0;",
      "	attribute vec3 morphTarget1;",
      "	attribute vec3 morphTarget2;",
      "	attribute vec3 morphTarget3;",
      "	#ifdef USE_MORPHNORMALS",
      "		attribute vec3 morphNormal0;",
      "		attribute vec3 morphNormal1;",
      "		attribute vec3 morphNormal2;",
      "		attribute vec3 morphNormal3;",
      "	#else",
      "		attribute vec3 morphTarget4;",
      "		attribute vec3 morphTarget5;",
      "		attribute vec3 morphTarget6;",
      "		attribute vec3 morphTarget7;",
      "	#endif",
      "#endif",
      "#ifdef USE_SKINNING",
      "	attribute vec4 skinIndex;",
      "	attribute vec4 skinWeight;",
      "#endif",
      "\n"
    ].filter(filterEmptyLine).join("\n");
    prefixFragment = [
      customExtensions,
      generatePrecision(parameters),
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines,
      parameters.useFog && parameters.fog ? "#define USE_FOG" : "",
      parameters.useFog && parameters.fogExp2 ? "#define FOG_EXP2" : "",
      parameters.map ? "#define USE_MAP" : "",
      parameters.matcap ? "#define USE_MATCAP" : "",
      parameters.envMap ? "#define USE_ENVMAP" : "",
      parameters.envMap ? "#define " + envMapTypeDefine : "",
      parameters.envMap ? "#define " + envMapModeDefine : "",
      parameters.envMap ? "#define " + envMapBlendingDefine : "",
      parameters.lightMap ? "#define USE_LIGHTMAP" : "",
      parameters.aoMap ? "#define USE_AOMAP" : "",
      parameters.emissiveMap ? "#define USE_EMISSIVEMAP" : "",
      parameters.bumpMap ? "#define USE_BUMPMAP" : "",
      parameters.normalMap ? "#define USE_NORMALMAP" : "",
      parameters.normalMap && parameters.objectSpaceNormalMap ? "#define OBJECTSPACE_NORMALMAP" : "",
      parameters.normalMap && parameters.tangentSpaceNormalMap ? "#define TANGENTSPACE_NORMALMAP" : "",
      parameters.clearcoat ? "#define USE_CLEARCOAT" : "",
      parameters.clearcoatMap ? "#define USE_CLEARCOATMAP" : "",
      parameters.clearcoatRoughnessMap ? "#define USE_CLEARCOAT_ROUGHNESSMAP" : "",
      parameters.clearcoatNormalMap ? "#define USE_CLEARCOAT_NORMALMAP" : "",
      parameters.specularMap ? "#define USE_SPECULARMAP" : "",
      parameters.specularIntensityMap ? "#define USE_SPECULARINTENSITYMAP" : "",
      parameters.specularColorMap ? "#define USE_SPECULARCOLORMAP" : "",
      parameters.roughnessMap ? "#define USE_ROUGHNESSMAP" : "",
      parameters.metalnessMap ? "#define USE_METALNESSMAP" : "",
      parameters.alphaMap ? "#define USE_ALPHAMAP" : "",
      parameters.alphaTest ? "#define USE_ALPHATEST" : "",
      parameters.sheen ? "#define USE_SHEEN" : "",
      parameters.sheenColorMap ? "#define USE_SHEENCOLORMAP" : "",
      parameters.sheenRoughnessMap ? "#define USE_SHEENROUGHNESSMAP" : "",
      parameters.transmission ? "#define USE_TRANSMISSION" : "",
      parameters.transmissionMap ? "#define USE_TRANSMISSIONMAP" : "",
      parameters.thicknessMap ? "#define USE_THICKNESSMAP" : "",
      parameters.decodeVideoTexture ? "#define DECODE_VIDEO_TEXTURE" : "",
      parameters.vertexTangents ? "#define USE_TANGENT" : "",
      parameters.vertexColors || parameters.instancingColor ? "#define USE_COLOR" : "",
      parameters.vertexAlphas ? "#define USE_COLOR_ALPHA" : "",
      parameters.vertexUvs ? "#define USE_UV" : "",
      parameters.uvsVertexOnly ? "#define UVS_VERTEX_ONLY" : "",
      parameters.gradientMap ? "#define USE_GRADIENTMAP" : "",
      parameters.flatShading ? "#define FLAT_SHADED" : "",
      parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
      parameters.flipSided ? "#define FLIP_SIDED" : "",
      parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
      parameters.shadowMapEnabled ? "#define " + shadowMapTypeDefine : "",
      parameters.premultipliedAlpha ? "#define PREMULTIPLIED_ALPHA" : "",
      parameters.physicallyCorrectLights ? "#define PHYSICALLY_CORRECT_LIGHTS" : "",
      parameters.logarithmicDepthBuffer ? "#define USE_LOGDEPTHBUF" : "",
      parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? "#define USE_LOGDEPTHBUF_EXT" : "",
      (parameters.extensionShaderTextureLOD || parameters.envMap) && parameters.rendererExtensionShaderTextureLod ? "#define TEXTURE_LOD_EXT" : "",
      "uniform mat4 viewMatrix;",
      "uniform vec3 cameraPosition;",
      "uniform bool isOrthographic;",
      parameters.toneMapping !== NoToneMapping ? "#define TONE_MAPPING" : "",
      parameters.toneMapping !== NoToneMapping ? ShaderChunk["tonemapping_pars_fragment"] : "",
      parameters.toneMapping !== NoToneMapping ? getToneMappingFunction("toneMapping", parameters.toneMapping) : "",
      parameters.dithering ? "#define DITHERING" : "",
      parameters.alphaWrite ? "" : "#define OPAQUE",
      ShaderChunk["encodings_pars_fragment"],
      getTexelEncodingFunction("linearToOutputTexel", parameters.outputEncoding),
      parameters.depthPacking ? "#define DEPTH_PACKING " + parameters.depthPacking : "",
      "\n"
    ].filter(filterEmptyLine).join("\n");
  }
  vertexShader = resolveIncludes(vertexShader);
  vertexShader = replaceLightNums(vertexShader, parameters);
  vertexShader = replaceClippingPlaneNums(vertexShader, parameters);
  fragmentShader = resolveIncludes(fragmentShader);
  fragmentShader = replaceLightNums(fragmentShader, parameters);
  fragmentShader = replaceClippingPlaneNums(fragmentShader, parameters);
  vertexShader = unrollLoops(vertexShader);
  fragmentShader = unrollLoops(fragmentShader);
  if (parameters.isWebGL2 && parameters.isRawShaderMaterial !== true) {
    versionString = "#version 300 es\n";
    prefixVertex = [
      "precision mediump sampler2DArray;",
      "#define attribute in",
      "#define varying out",
      "#define texture2D texture"
    ].join("\n") + "\n" + prefixVertex;
    prefixFragment = [
      "#define varying in",
      parameters.glslVersion === GLSL3 ? "" : "layout(location = 0) out highp vec4 pc_fragColor;",
      parameters.glslVersion === GLSL3 ? "" : "#define gl_FragColor pc_fragColor",
      "#define gl_FragDepthEXT gl_FragDepth",
      "#define texture2D texture",
      "#define textureCube texture",
      "#define texture2DProj textureProj",
      "#define texture2DLodEXT textureLod",
      "#define texture2DProjLodEXT textureProjLod",
      "#define textureCubeLodEXT textureLod",
      "#define texture2DGradEXT textureGrad",
      "#define texture2DProjGradEXT textureProjGrad",
      "#define textureCubeGradEXT textureGrad"
    ].join("\n") + "\n" + prefixFragment;
  }
  const vertexGlsl = versionString + prefixVertex + vertexShader;
  const fragmentGlsl = versionString + prefixFragment + fragmentShader;
  const glVertexShader = WebGLShader(gl, 35633, vertexGlsl);
  const glFragmentShader = WebGLShader(gl, 35632, fragmentGlsl);
  gl.attachShader(program, glVertexShader);
  gl.attachShader(program, glFragmentShader);
  if (parameters.index0AttributeName !== void 0) {
    gl.bindAttribLocation(program, 0, parameters.index0AttributeName);
  } else if (parameters.morphTargets === true) {
    gl.bindAttribLocation(program, 0, "position");
  }
  gl.linkProgram(program);
  if (renderer.debug.checkShaderErrors) {
    const programLog = gl.getProgramInfoLog(program).trim();
    const vertexLog = gl.getShaderInfoLog(glVertexShader).trim();
    const fragmentLog = gl.getShaderInfoLog(glFragmentShader).trim();
    let runnable = true;
    let haveDiagnostics = true;
    if (gl.getProgramParameter(program, 35714) === false) {
      runnable = false;
      const vertexErrors = getShaderErrors(gl, glVertexShader, "vertex");
      const fragmentErrors = getShaderErrors(gl, glFragmentShader, "fragment");
      console.error("THREE.WebGLProgram: Shader Error " + gl.getError() + " - VALIDATE_STATUS " + gl.getProgramParameter(program, 35715) + "\n\nProgram Info Log: " + programLog + "\n" + vertexErrors + "\n" + fragmentErrors);
    } else if (programLog !== "") {
      console.warn("THREE.WebGLProgram: Program Info Log:", programLog);
    } else if (vertexLog === "" || fragmentLog === "") {
      haveDiagnostics = false;
    }
    if (haveDiagnostics) {
      this.diagnostics = {
        runnable,
        programLog,
        vertexShader: {
          log: vertexLog,
          prefix: prefixVertex
        },
        fragmentShader: {
          log: fragmentLog,
          prefix: prefixFragment
        }
      };
    }
  }
  gl.deleteShader(glVertexShader);
  gl.deleteShader(glFragmentShader);
  let cachedUniforms;
  this.getUniforms = function() {
    if (cachedUniforms === void 0) {
      cachedUniforms = new WebGLUniforms(gl, program);
    }
    return cachedUniforms;
  };
  let cachedAttributes;
  this.getAttributes = function() {
    if (cachedAttributes === void 0) {
      cachedAttributes = fetchAttributeLocations(gl, program);
    }
    return cachedAttributes;
  };
  this.destroy = function() {
    bindingStates.releaseStatesOfProgram(this);
    gl.deleteProgram(program);
    this.program = void 0;
  };
  this.name = parameters.shaderName;
  this.id = programIdCount++;
  this.cacheKey = cacheKey;
  this.usedTimes = 1;
  this.program = program;
  this.vertexShader = glVertexShader;
  this.fragmentShader = glFragmentShader;
  return this;
}
let _id = 0;
class WebGLShaderCache {
  constructor() {
    this.shaderCache = new Map();
    this.materialCache = new Map();
  }
  update(material) {
    const vertexShader = material.vertexShader;
    const fragmentShader = material.fragmentShader;
    const vertexShaderStage = this._getShaderStage(vertexShader);
    const fragmentShaderStage = this._getShaderStage(fragmentShader);
    const materialShaders = this._getShaderCacheForMaterial(material);
    if (materialShaders.has(vertexShaderStage) === false) {
      materialShaders.add(vertexShaderStage);
      vertexShaderStage.usedTimes++;
    }
    if (materialShaders.has(fragmentShaderStage) === false) {
      materialShaders.add(fragmentShaderStage);
      fragmentShaderStage.usedTimes++;
    }
    return this;
  }
  remove(material) {
    const materialShaders = this.materialCache.get(material);
    for (const shaderStage of materialShaders) {
      shaderStage.usedTimes--;
      if (shaderStage.usedTimes === 0)
        this.shaderCache.delete(shaderStage);
    }
    this.materialCache.delete(material);
    return this;
  }
  getVertexShaderID(material) {
    return this._getShaderStage(material.vertexShader).id;
  }
  getFragmentShaderID(material) {
    return this._getShaderStage(material.fragmentShader).id;
  }
  dispose() {
    this.shaderCache.clear();
    this.materialCache.clear();
  }
  _getShaderCacheForMaterial(material) {
    const cache = this.materialCache;
    if (cache.has(material) === false) {
      cache.set(material, new Set());
    }
    return cache.get(material);
  }
  _getShaderStage(code) {
    const cache = this.shaderCache;
    if (cache.has(code) === false) {
      const stage = new WebGLShaderStage();
      cache.set(code, stage);
    }
    return cache.get(code);
  }
}
class WebGLShaderStage {
  constructor() {
    this.id = _id++;
    this.usedTimes = 0;
  }
}
function WebGLPrograms(renderer, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping) {
  const _programLayers = new Layers();
  const _customShaders = new WebGLShaderCache();
  const programs = [];
  const isWebGL2 = capabilities.isWebGL2;
  const logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;
  const floatVertexTextures = capabilities.floatVertexTextures;
  const maxVertexUniforms = capabilities.maxVertexUniforms;
  const vertexTextures = capabilities.vertexTextures;
  let precision = capabilities.precision;
  const shaderIDs = {
    MeshDepthMaterial: "depth",
    MeshDistanceMaterial: "distanceRGBA",
    MeshNormalMaterial: "normal",
    MeshBasicMaterial: "basic",
    MeshLambertMaterial: "lambert",
    MeshPhongMaterial: "phong",
    MeshToonMaterial: "toon",
    MeshStandardMaterial: "physical",
    MeshPhysicalMaterial: "physical",
    MeshMatcapMaterial: "matcap",
    LineBasicMaterial: "basic",
    LineDashedMaterial: "dashed",
    PointsMaterial: "points",
    ShadowMaterial: "shadow",
    SpriteMaterial: "sprite"
  };
  function getMaxBones(object) {
    const skeleton = object.skeleton;
    const bones = skeleton.bones;
    if (floatVertexTextures) {
      return 1024;
    } else {
      const nVertexUniforms = maxVertexUniforms;
      const nVertexMatrices = Math.floor((nVertexUniforms - 20) / 4);
      const maxBones = Math.min(nVertexMatrices, bones.length);
      if (maxBones < bones.length) {
        console.warn("THREE.WebGLRenderer: Skeleton has " + bones.length + " bones. This GPU supports " + maxBones + ".");
        return 0;
      }
      return maxBones;
    }
  }
  function getParameters(material, lights, shadows, scene, object) {
    const fog = scene.fog;
    const environment = material.isMeshStandardMaterial ? scene.environment : null;
    const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
    const shaderID = shaderIDs[material.type];
    const maxBones = object.isSkinnedMesh ? getMaxBones(object) : 0;
    if (material.precision !== null) {
      precision = capabilities.getMaxPrecision(material.precision);
      if (precision !== material.precision) {
        console.warn("THREE.WebGLProgram.getParameters:", material.precision, "not supported, using", precision, "instead.");
      }
    }
    let vertexShader, fragmentShader;
    let customVertexShaderID, customFragmentShaderID;
    if (shaderID) {
      const shader = ShaderLib[shaderID];
      vertexShader = shader.vertexShader;
      fragmentShader = shader.fragmentShader;
    } else {
      vertexShader = material.vertexShader;
      fragmentShader = material.fragmentShader;
      _customShaders.update(material);
      customVertexShaderID = _customShaders.getVertexShaderID(material);
      customFragmentShaderID = _customShaders.getFragmentShaderID(material);
    }
    const currentRenderTarget = renderer.getRenderTarget();
    const useAlphaTest = material.alphaTest > 0;
    const useClearcoat = material.clearcoat > 0;
    const parameters = {
      isWebGL2,
      shaderID,
      shaderName: material.type,
      vertexShader,
      fragmentShader,
      defines: material.defines,
      customVertexShaderID,
      customFragmentShaderID,
      isRawShaderMaterial: material.isRawShaderMaterial === true,
      glslVersion: material.glslVersion,
      precision,
      instancing: object.isInstancedMesh === true,
      instancingColor: object.isInstancedMesh === true && object.instanceColor !== null,
      supportsVertexTextures: vertexTextures,
      outputEncoding: currentRenderTarget === null ? renderer.outputEncoding : currentRenderTarget.isXRRenderTarget === true ? currentRenderTarget.texture.encoding : LinearEncoding,
      map: !!material.map,
      matcap: !!material.matcap,
      envMap: !!envMap,
      envMapMode: envMap && envMap.mapping,
      envMapCubeUV: !!envMap && (envMap.mapping === CubeUVReflectionMapping || envMap.mapping === CubeUVRefractionMapping),
      lightMap: !!material.lightMap,
      aoMap: !!material.aoMap,
      emissiveMap: !!material.emissiveMap,
      bumpMap: !!material.bumpMap,
      normalMap: !!material.normalMap,
      objectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,
      tangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,
      decodeVideoTexture: !!material.map && material.map.isVideoTexture === true && material.map.encoding === sRGBEncoding,
      clearcoat: useClearcoat,
      clearcoatMap: useClearcoat && !!material.clearcoatMap,
      clearcoatRoughnessMap: useClearcoat && !!material.clearcoatRoughnessMap,
      clearcoatNormalMap: useClearcoat && !!material.clearcoatNormalMap,
      displacementMap: !!material.displacementMap,
      roughnessMap: !!material.roughnessMap,
      metalnessMap: !!material.metalnessMap,
      specularMap: !!material.specularMap,
      specularIntensityMap: !!material.specularIntensityMap,
      specularColorMap: !!material.specularColorMap,
      alphaMap: !!material.alphaMap,
      alphaTest: useAlphaTest,
      alphaWrite: material.alphaWrite || material.transparent,
      gradientMap: !!material.gradientMap,
      sheen: material.sheen > 0,
      sheenColorMap: !!material.sheenColorMap,
      sheenRoughnessMap: !!material.sheenRoughnessMap,
      transmission: material.transmission > 0,
      transmissionMap: !!material.transmissionMap,
      thicknessMap: !!material.thicknessMap,
      combine: material.combine,
      vertexTangents: !!material.normalMap && !!object.geometry && !!object.geometry.attributes.tangent,
      vertexColors: material.vertexColors,
      vertexAlphas: material.vertexColors === true && !!object.geometry && !!object.geometry.attributes.color && object.geometry.attributes.color.itemSize === 4,
      vertexUvs: !!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatMap || !!material.clearcoatRoughnessMap || !!material.clearcoatNormalMap || !!material.displacementMap || !!material.transmissionMap || !!material.thicknessMap || !!material.specularIntensityMap || !!material.specularColorMap || !!material.sheenColorMap || !!material.sheenRoughnessMap,
      uvsVertexOnly: !(!!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatNormalMap || material.transmission > 0 || !!material.transmissionMap || !!material.thicknessMap || !!material.specularIntensityMap || !!material.specularColorMap || material.sheen > 0 || !!material.sheenColorMap || !!material.sheenRoughnessMap) && !!material.displacementMap,
      fog: !!fog,
      useFog: material.fog,
      fogExp2: fog && fog.isFogExp2,
      flatShading: !!material.flatShading,
      sizeAttenuation: material.sizeAttenuation,
      logarithmicDepthBuffer,
      skinning: object.isSkinnedMesh === true && maxBones > 0,
      maxBones,
      useVertexTexture: floatVertexTextures,
      morphTargets: !!object.geometry && !!object.geometry.morphAttributes.position,
      morphNormals: !!object.geometry && !!object.geometry.morphAttributes.normal,
      morphTargetsCount: !!object.geometry && !!object.geometry.morphAttributes.position ? object.geometry.morphAttributes.position.length : 0,
      numDirLights: lights.directional.length,
      numPointLights: lights.point.length,
      numSpotLights: lights.spot.length,
      numRectAreaLights: lights.rectArea.length,
      numHemiLights: lights.hemi.length,
      numDirLightShadows: lights.directionalShadowMap.length,
      numPointLightShadows: lights.pointShadowMap.length,
      numSpotLightShadows: lights.spotShadowMap.length,
      numClippingPlanes: clipping.numPlanes,
      numClipIntersection: clipping.numIntersection,
      dithering: material.dithering,
      shadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,
      shadowMapType: renderer.shadowMap.type,
      toneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,
      physicallyCorrectLights: renderer.physicallyCorrectLights,
      premultipliedAlpha: material.premultipliedAlpha,
      doubleSided: material.side === DoubleSide,
      flipSided: material.side === BackSide,
      depthPacking: material.depthPacking !== void 0 ? material.depthPacking : false,
      index0AttributeName: material.index0AttributeName,
      extensionDerivatives: material.extensions && material.extensions.derivatives,
      extensionFragDepth: material.extensions && material.extensions.fragDepth,
      extensionDrawBuffers: material.extensions && material.extensions.drawBuffers,
      extensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,
      rendererExtensionFragDepth: isWebGL2 || extensions.has("EXT_frag_depth"),
      rendererExtensionDrawBuffers: isWebGL2 || extensions.has("WEBGL_draw_buffers"),
      rendererExtensionShaderTextureLod: isWebGL2 || extensions.has("EXT_shader_texture_lod"),
      customProgramCacheKey: material.customProgramCacheKey()
    };
    return parameters;
  }
  function getProgramCacheKey(parameters) {
    const array = [];
    if (parameters.shaderID) {
      array.push(parameters.shaderID);
    } else {
      array.push(parameters.customVertexShaderID);
      array.push(parameters.customFragmentShaderID);
    }
    if (parameters.defines !== void 0) {
      for (const name in parameters.defines) {
        array.push(name);
        array.push(parameters.defines[name]);
      }
    }
    if (parameters.isRawShaderMaterial === false) {
      getProgramCacheKeyParameters(array, parameters);
      getProgramCacheKeyBooleans(array, parameters);
      array.push(renderer.outputEncoding);
    }
    array.push(parameters.customProgramCacheKey);
    return array.join();
  }
  function getProgramCacheKeyParameters(array, parameters) {
    array.push(parameters.precision);
    array.push(parameters.outputEncoding);
    array.push(parameters.envMapMode);
    array.push(parameters.combine);
    array.push(parameters.vertexUvs);
    array.push(parameters.fogExp2);
    array.push(parameters.sizeAttenuation);
    array.push(parameters.maxBones);
    array.push(parameters.morphTargetsCount);
    array.push(parameters.numDirLights);
    array.push(parameters.numPointLights);
    array.push(parameters.numSpotLights);
    array.push(parameters.numHemiLights);
    array.push(parameters.numRectAreaLights);
    array.push(parameters.numDirLightShadows);
    array.push(parameters.numPointLightShadows);
    array.push(parameters.numSpotLightShadows);
    array.push(parameters.shadowMapType);
    array.push(parameters.toneMapping);
    array.push(parameters.numClippingPlanes);
    array.push(parameters.numClipIntersection);
    array.push(parameters.alphaWrite);
  }
  function getProgramCacheKeyBooleans(array, parameters) {
    _programLayers.disableAll();
    if (parameters.isWebGL2)
      _programLayers.enable(0);
    if (parameters.supportsVertexTextures)
      _programLayers.enable(1);
    if (parameters.instancing)
      _programLayers.enable(2);
    if (parameters.instancingColor)
      _programLayers.enable(3);
    if (parameters.map)
      _programLayers.enable(4);
    if (parameters.matcap)
      _programLayers.enable(5);
    if (parameters.envMap)
      _programLayers.enable(6);
    if (parameters.envMapCubeUV)
      _programLayers.enable(7);
    if (parameters.lightMap)
      _programLayers.enable(8);
    if (parameters.aoMap)
      _programLayers.enable(9);
    if (parameters.emissiveMap)
      _programLayers.enable(10);
    if (parameters.bumpMap)
      _programLayers.enable(11);
    if (parameters.normalMap)
      _programLayers.enable(12);
    if (parameters.objectSpaceNormalMap)
      _programLayers.enable(13);
    if (parameters.tangentSpaceNormalMap)
      _programLayers.enable(14);
    if (parameters.clearcoat)
      _programLayers.enable(15);
    if (parameters.clearcoatMap)
      _programLayers.enable(16);
    if (parameters.clearcoatRoughnessMap)
      _programLayers.enable(17);
    if (parameters.clearcoatNormalMap)
      _programLayers.enable(18);
    if (parameters.displacementMap)
      _programLayers.enable(19);
    if (parameters.specularMap)
      _programLayers.enable(20);
    if (parameters.roughnessMap)
      _programLayers.enable(21);
    if (parameters.metalnessMap)
      _programLayers.enable(22);
    if (parameters.gradientMap)
      _programLayers.enable(23);
    if (parameters.alphaMap)
      _programLayers.enable(24);
    if (parameters.alphaTest)
      _programLayers.enable(25);
    if (parameters.vertexColors)
      _programLayers.enable(26);
    if (parameters.vertexAlphas)
      _programLayers.enable(27);
    if (parameters.vertexUvs)
      _programLayers.enable(28);
    if (parameters.vertexTangents)
      _programLayers.enable(29);
    if (parameters.uvsVertexOnly)
      _programLayers.enable(30);
    if (parameters.fog)
      _programLayers.enable(31);
    array.push(_programLayers.mask);
    _programLayers.disableAll();
    if (parameters.useFog)
      _programLayers.enable(0);
    if (parameters.flatShading)
      _programLayers.enable(1);
    if (parameters.logarithmicDepthBuffer)
      _programLayers.enable(2);
    if (parameters.skinning)
      _programLayers.enable(3);
    if (parameters.useVertexTexture)
      _programLayers.enable(4);
    if (parameters.morphTargets)
      _programLayers.enable(5);
    if (parameters.morphNormals)
      _programLayers.enable(6);
    if (parameters.premultipliedAlpha)
      _programLayers.enable(7);
    if (parameters.shadowMapEnabled)
      _programLayers.enable(8);
    if (parameters.physicallyCorrectLights)
      _programLayers.enable(9);
    if (parameters.doubleSided)
      _programLayers.enable(10);
    if (parameters.flipSided)
      _programLayers.enable(11);
    if (parameters.depthPacking)
      _programLayers.enable(12);
    if (parameters.dithering)
      _programLayers.enable(13);
    if (parameters.specularIntensityMap)
      _programLayers.enable(14);
    if (parameters.specularColorMap)
      _programLayers.enable(15);
    if (parameters.transmission)
      _programLayers.enable(16);
    if (parameters.transmissionMap)
      _programLayers.enable(17);
    if (parameters.thicknessMap)
      _programLayers.enable(18);
    if (parameters.sheen)
      _programLayers.enable(19);
    if (parameters.sheenColorMap)
      _programLayers.enable(20);
    if (parameters.sheenRoughnessMap)
      _programLayers.enable(21);
    if (parameters.decodeVideoTexture)
      _programLayers.enable(22);
    array.push(_programLayers.mask);
  }
  function getUniforms(material) {
    const shaderID = shaderIDs[material.type];
    let uniforms;
    if (shaderID) {
      const shader = ShaderLib[shaderID];
      uniforms = UniformsUtils.clone(shader.uniforms);
    } else {
      uniforms = material.uniforms;
    }
    return uniforms;
  }
  function acquireProgram(parameters, cacheKey) {
    let program;
    for (let p = 0, pl = programs.length; p < pl; p++) {
      const preexistingProgram = programs[p];
      if (preexistingProgram.cacheKey === cacheKey) {
        program = preexistingProgram;
        ++program.usedTimes;
        break;
      }
    }
    if (program === void 0) {
      program = new WebGLProgram(renderer, cacheKey, parameters, bindingStates);
      programs.push(program);
    }
    return program;
  }
  function releaseProgram(program) {
    if (--program.usedTimes === 0) {
      const i = programs.indexOf(program);
      programs[i] = programs[programs.length - 1];
      programs.pop();
      program.destroy();
    }
  }
  function releaseShaderCache(material) {
    _customShaders.remove(material);
  }
  function dispose() {
    _customShaders.dispose();
  }
  return {
    getParameters,
    getProgramCacheKey,
    getUniforms,
    acquireProgram,
    releaseProgram,
    releaseShaderCache,
    programs,
    dispose
  };
}
function WebGLProperties() {
  let properties = new WeakMap();
  function get(object) {
    let map = properties.get(object);
    if (map === void 0) {
      map = {};
      properties.set(object, map);
    }
    return map;
  }
  function remove(object) {
    properties.delete(object);
  }
  function update(object, key, value) {
    properties.get(object)[key] = value;
  }
  function dispose() {
    properties = new WeakMap();
  }
  return {
    get,
    remove,
    update,
    dispose
  };
}
function painterSortStable(a, b) {
  if (a.groupOrder !== b.groupOrder) {
    return a.groupOrder - b.groupOrder;
  } else if (a.renderOrder !== b.renderOrder) {
    return a.renderOrder - b.renderOrder;
  } else if (a.material.id !== b.material.id) {
    return a.material.id - b.material.id;
  } else if (a.z !== b.z) {
    return a.z - b.z;
  } else {
    return a.id - b.id;
  }
}
function reversePainterSortStable(a, b) {
  if (a.groupOrder !== b.groupOrder) {
    return a.groupOrder - b.groupOrder;
  } else if (a.renderOrder !== b.renderOrder) {
    return a.renderOrder - b.renderOrder;
  } else if (a.z !== b.z) {
    return b.z - a.z;
  } else {
    return a.id - b.id;
  }
}
function WebGLRenderList() {
  const renderItems = [];
  let renderItemsIndex = 0;
  const opaque = [];
  const transmissive = [];
  const transparent = [];
  function init() {
    renderItemsIndex = 0;
    opaque.length = 0;
    transmissive.length = 0;
    transparent.length = 0;
  }
  function getNextRenderItem(object, geometry, material, groupOrder, z, group) {
    let renderItem = renderItems[renderItemsIndex];
    if (renderItem === void 0) {
      renderItem = {
        id: object.id,
        object,
        geometry,
        material,
        groupOrder,
        renderOrder: object.renderOrder,
        z,
        group
      };
      renderItems[renderItemsIndex] = renderItem;
    } else {
      renderItem.id = object.id;
      renderItem.object = object;
      renderItem.geometry = geometry;
      renderItem.material = material;
      renderItem.groupOrder = groupOrder;
      renderItem.renderOrder = object.renderOrder;
      renderItem.z = z;
      renderItem.group = group;
    }
    renderItemsIndex++;
    return renderItem;
  }
  function push(object, geometry, material, groupOrder, z, group) {
    const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
    if (material.transmission > 0) {
      transmissive.push(renderItem);
    } else if (material.transparent === true) {
      transparent.push(renderItem);
    } else {
      opaque.push(renderItem);
    }
  }
  function unshift(object, geometry, material, groupOrder, z, group) {
    const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
    if (material.transmission > 0) {
      transmissive.unshift(renderItem);
    } else if (material.transparent === true) {
      transparent.unshift(renderItem);
    } else {
      opaque.unshift(renderItem);
    }
  }
  function sort(customOpaqueSort, customTransparentSort) {
    if (opaque.length > 1)
      opaque.sort(customOpaqueSort || painterSortStable);
    if (transmissive.length > 1)
      transmissive.sort(customTransparentSort || reversePainterSortStable);
    if (transparent.length > 1)
      transparent.sort(customTransparentSort || reversePainterSortStable);
  }
  function finish() {
    for (let i = renderItemsIndex, il = renderItems.length; i < il; i++) {
      const renderItem = renderItems[i];
      if (renderItem.id === null)
        break;
      renderItem.id = null;
      renderItem.object = null;
      renderItem.geometry = null;
      renderItem.material = null;
      renderItem.group = null;
    }
  }
  return {
    opaque,
    transmissive,
    transparent,
    init,
    push,
    unshift,
    finish,
    sort
  };
}
function WebGLRenderLists() {
  let lists = new WeakMap();
  function get(scene, renderCallDepth) {
    let list;
    if (lists.has(scene) === false) {
      list = new WebGLRenderList();
      lists.set(scene, [list]);
    } else {
      if (renderCallDepth >= lists.get(scene).length) {
        list = new WebGLRenderList();
        lists.get(scene).push(list);
      } else {
        list = lists.get(scene)[renderCallDepth];
      }
    }
    return list;
  }
  function dispose() {
    lists = new WeakMap();
  }
  return {
    get,
    dispose
  };
}
function UniformsCache() {
  const lights = {};
  return {
    get: function(light) {
      if (lights[light.id] !== void 0) {
        return lights[light.id];
      }
      let uniforms;
      switch (light.type) {
        case "DirectionalLight":
          uniforms = {
            direction: new Vector3$1(),
            color: new Color()
          };
          break;
        case "SpotLight":
          uniforms = {
            position: new Vector3$1(),
            direction: new Vector3$1(),
            color: new Color(),
            distance: 0,
            coneCos: 0,
            penumbraCos: 0,
            decay: 0
          };
          break;
        case "PointLight":
          uniforms = {
            position: new Vector3$1(),
            color: new Color(),
            distance: 0,
            decay: 0
          };
          break;
        case "HemisphereLight":
          uniforms = {
            direction: new Vector3$1(),
            skyColor: new Color(),
            groundColor: new Color()
          };
          break;
        case "RectAreaLight":
          uniforms = {
            color: new Color(),
            position: new Vector3$1(),
            halfWidth: new Vector3$1(),
            halfHeight: new Vector3$1()
          };
          break;
      }
      lights[light.id] = uniforms;
      return uniforms;
    }
  };
}
function ShadowUniformsCache() {
  const lights = {};
  return {
    get: function(light) {
      if (lights[light.id] !== void 0) {
        return lights[light.id];
      }
      let uniforms;
      switch (light.type) {
        case "DirectionalLight":
          uniforms = {
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2$1()
          };
          break;
        case "SpotLight":
          uniforms = {
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2$1()
          };
          break;
        case "PointLight":
          uniforms = {
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2$1(),
            shadowCameraNear: 1,
            shadowCameraFar: 1e3
          };
          break;
      }
      lights[light.id] = uniforms;
      return uniforms;
    }
  };
}
let nextVersion = 0;
function shadowCastingLightsFirst(lightA, lightB) {
  return (lightB.castShadow ? 1 : 0) - (lightA.castShadow ? 1 : 0);
}
function WebGLLights(extensions, capabilities) {
  const cache = new UniformsCache();
  const shadowCache = ShadowUniformsCache();
  const state = {
    version: 0,
    hash: {
      directionalLength: -1,
      pointLength: -1,
      spotLength: -1,
      rectAreaLength: -1,
      hemiLength: -1,
      numDirectionalShadows: -1,
      numPointShadows: -1,
      numSpotShadows: -1
    },
    ambient: [0, 0, 0],
    probe: [],
    directional: [],
    directionalShadow: [],
    directionalShadowMap: [],
    directionalShadowMatrix: [],
    spot: [],
    spotShadow: [],
    spotShadowMap: [],
    spotShadowMatrix: [],
    rectArea: [],
    rectAreaLTC1: null,
    rectAreaLTC2: null,
    point: [],
    pointShadow: [],
    pointShadowMap: [],
    pointShadowMatrix: [],
    hemi: []
  };
  for (let i = 0; i < 9; i++)
    state.probe.push(new Vector3$1());
  const vector3 = new Vector3$1();
  const matrix4 = new Matrix4$1();
  const matrix42 = new Matrix4$1();
  function setup(lights, physicallyCorrectLights) {
    let r = 0, g = 0, b = 0;
    for (let i = 0; i < 9; i++)
      state.probe[i].set(0, 0, 0);
    let directionalLength = 0;
    let pointLength = 0;
    let spotLength = 0;
    let rectAreaLength = 0;
    let hemiLength = 0;
    let numDirectionalShadows = 0;
    let numPointShadows = 0;
    let numSpotShadows = 0;
    lights.sort(shadowCastingLightsFirst);
    const scaleFactor = physicallyCorrectLights !== true ? Math.PI : 1;
    for (let i = 0, l = lights.length; i < l; i++) {
      const light = lights[i];
      const color = light.color;
      const intensity = light.intensity;
      const distance = light.distance;
      const shadowMap = light.shadow && light.shadow.map ? light.shadow.map.texture : null;
      if (light.isAmbientLight) {
        r += color.r * intensity * scaleFactor;
        g += color.g * intensity * scaleFactor;
        b += color.b * intensity * scaleFactor;
      } else if (light.isLightProbe) {
        for (let j = 0; j < 9; j++) {
          state.probe[j].addScaledVector(light.sh.coefficients[j], intensity);
        }
      } else if (light.isDirectionalLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(light.color).multiplyScalar(light.intensity * scaleFactor);
        if (light.castShadow) {
          const shadow = light.shadow;
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          state.directionalShadow[directionalLength] = shadowUniforms;
          state.directionalShadowMap[directionalLength] = shadowMap;
          state.directionalShadowMatrix[directionalLength] = light.shadow.matrix;
          numDirectionalShadows++;
        }
        state.directional[directionalLength] = uniforms;
        directionalLength++;
      } else if (light.isSpotLight) {
        const uniforms = cache.get(light);
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.color.copy(color).multiplyScalar(intensity * scaleFactor);
        uniforms.distance = distance;
        uniforms.coneCos = Math.cos(light.angle);
        uniforms.penumbraCos = Math.cos(light.angle * (1 - light.penumbra));
        uniforms.decay = light.decay;
        if (light.castShadow) {
          const shadow = light.shadow;
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          state.spotShadow[spotLength] = shadowUniforms;
          state.spotShadowMap[spotLength] = shadowMap;
          state.spotShadowMatrix[spotLength] = light.shadow.matrix;
          numSpotShadows++;
        }
        state.spot[spotLength] = uniforms;
        spotLength++;
      } else if (light.isRectAreaLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(color).multiplyScalar(intensity);
        uniforms.halfWidth.set(light.width * 0.5, 0, 0);
        uniforms.halfHeight.set(0, light.height * 0.5, 0);
        state.rectArea[rectAreaLength] = uniforms;
        rectAreaLength++;
      } else if (light.isPointLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(light.color).multiplyScalar(light.intensity * scaleFactor);
        uniforms.distance = light.distance;
        uniforms.decay = light.decay;
        if (light.castShadow) {
          const shadow = light.shadow;
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          shadowUniforms.shadowCameraNear = shadow.camera.near;
          shadowUniforms.shadowCameraFar = shadow.camera.far;
          state.pointShadow[pointLength] = shadowUniforms;
          state.pointShadowMap[pointLength] = shadowMap;
          state.pointShadowMatrix[pointLength] = light.shadow.matrix;
          numPointShadows++;
        }
        state.point[pointLength] = uniforms;
        pointLength++;
      } else if (light.isHemisphereLight) {
        const uniforms = cache.get(light);
        uniforms.skyColor.copy(light.color).multiplyScalar(intensity * scaleFactor);
        uniforms.groundColor.copy(light.groundColor).multiplyScalar(intensity * scaleFactor);
        state.hemi[hemiLength] = uniforms;
        hemiLength++;
      }
    }
    if (rectAreaLength > 0) {
      if (capabilities.isWebGL2) {
        state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
        state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
      } else {
        if (extensions.has("OES_texture_float_linear") === true) {
          state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
          state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
        } else if (extensions.has("OES_texture_half_float_linear") === true) {
          state.rectAreaLTC1 = UniformsLib.LTC_HALF_1;
          state.rectAreaLTC2 = UniformsLib.LTC_HALF_2;
        } else {
          console.error("THREE.WebGLRenderer: Unable to use RectAreaLight. Missing WebGL extensions.");
        }
      }
    }
    state.ambient[0] = r;
    state.ambient[1] = g;
    state.ambient[2] = b;
    const hash = state.hash;
    if (hash.directionalLength !== directionalLength || hash.pointLength !== pointLength || hash.spotLength !== spotLength || hash.rectAreaLength !== rectAreaLength || hash.hemiLength !== hemiLength || hash.numDirectionalShadows !== numDirectionalShadows || hash.numPointShadows !== numPointShadows || hash.numSpotShadows !== numSpotShadows) {
      state.directional.length = directionalLength;
      state.spot.length = spotLength;
      state.rectArea.length = rectAreaLength;
      state.point.length = pointLength;
      state.hemi.length = hemiLength;
      state.directionalShadow.length = numDirectionalShadows;
      state.directionalShadowMap.length = numDirectionalShadows;
      state.pointShadow.length = numPointShadows;
      state.pointShadowMap.length = numPointShadows;
      state.spotShadow.length = numSpotShadows;
      state.spotShadowMap.length = numSpotShadows;
      state.directionalShadowMatrix.length = numDirectionalShadows;
      state.pointShadowMatrix.length = numPointShadows;
      state.spotShadowMatrix.length = numSpotShadows;
      hash.directionalLength = directionalLength;
      hash.pointLength = pointLength;
      hash.spotLength = spotLength;
      hash.rectAreaLength = rectAreaLength;
      hash.hemiLength = hemiLength;
      hash.numDirectionalShadows = numDirectionalShadows;
      hash.numPointShadows = numPointShadows;
      hash.numSpotShadows = numSpotShadows;
      state.version = nextVersion++;
    }
  }
  function setupView(lights, camera) {
    let directionalLength = 0;
    let pointLength = 0;
    let spotLength = 0;
    let rectAreaLength = 0;
    let hemiLength = 0;
    const viewMatrix = camera.matrixWorldInverse;
    for (let i = 0, l = lights.length; i < l; i++) {
      const light = lights[i];
      if (light.isDirectionalLight) {
        const uniforms = state.directional[directionalLength];
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        vector3.setFromMatrixPosition(light.target.matrixWorld);
        uniforms.direction.sub(vector3);
        uniforms.direction.transformDirection(viewMatrix);
        directionalLength++;
      } else if (light.isSpotLight) {
        const uniforms = state.spot[spotLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        vector3.setFromMatrixPosition(light.target.matrixWorld);
        uniforms.direction.sub(vector3);
        uniforms.direction.transformDirection(viewMatrix);
        spotLength++;
      } else if (light.isRectAreaLight) {
        const uniforms = state.rectArea[rectAreaLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        matrix42.identity();
        matrix4.copy(light.matrixWorld);
        matrix4.premultiply(viewMatrix);
        matrix42.extractRotation(matrix4);
        uniforms.halfWidth.set(light.width * 0.5, 0, 0);
        uniforms.halfHeight.set(0, light.height * 0.5, 0);
        uniforms.halfWidth.applyMatrix4(matrix42);
        uniforms.halfHeight.applyMatrix4(matrix42);
        rectAreaLength++;
      } else if (light.isPointLight) {
        const uniforms = state.point[pointLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        pointLength++;
      } else if (light.isHemisphereLight) {
        const uniforms = state.hemi[hemiLength];
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        uniforms.direction.transformDirection(viewMatrix);
        uniforms.direction.normalize();
        hemiLength++;
      }
    }
  }
  return {
    setup,
    setupView,
    state
  };
}
function WebGLRenderState(extensions, capabilities) {
  const lights = new WebGLLights(extensions, capabilities);
  const lightsArray = [];
  const shadowsArray = [];
  function init() {
    lightsArray.length = 0;
    shadowsArray.length = 0;
  }
  function pushLight(light) {
    lightsArray.push(light);
  }
  function pushShadow(shadowLight) {
    shadowsArray.push(shadowLight);
  }
  function setupLights(physicallyCorrectLights) {
    lights.setup(lightsArray, physicallyCorrectLights);
  }
  function setupLightsView(camera) {
    lights.setupView(lightsArray, camera);
  }
  const state = {
    lightsArray,
    shadowsArray,
    lights
  };
  return {
    init,
    state,
    setupLights,
    setupLightsView,
    pushLight,
    pushShadow
  };
}
function WebGLRenderStates(extensions, capabilities) {
  let renderStates = new WeakMap();
  function get(scene, renderCallDepth = 0) {
    let renderState;
    if (renderStates.has(scene) === false) {
      renderState = new WebGLRenderState(extensions, capabilities);
      renderStates.set(scene, [renderState]);
    } else {
      if (renderCallDepth >= renderStates.get(scene).length) {
        renderState = new WebGLRenderState(extensions, capabilities);
        renderStates.get(scene).push(renderState);
      } else {
        renderState = renderStates.get(scene)[renderCallDepth];
      }
    }
    return renderState;
  }
  function dispose() {
    renderStates = new WeakMap();
  }
  return {
    get,
    dispose
  };
}
class MeshDepthMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshDepthMaterial";
    this.depthPacking = BasicDepthPacking;
    this.map = null;
    this.alphaMap = null;
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.fog = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.depthPacking = source.depthPacking;
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    return this;
  }
}
MeshDepthMaterial.prototype.isMeshDepthMaterial = true;
class MeshDistanceMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshDistanceMaterial";
    this.referencePosition = new Vector3$1();
    this.nearDistance = 1;
    this.farDistance = 1e3;
    this.map = null;
    this.alphaMap = null;
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.fog = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.referencePosition.copy(source.referencePosition);
    this.nearDistance = source.nearDistance;
    this.farDistance = source.farDistance;
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    return this;
  }
}
MeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;
const vertex = "void main() {\n	gl_Position = vec4( position, 1.0 );\n}";
const fragment = "uniform sampler2D shadow_pass;\nuniform vec2 resolution;\nuniform float radius;\n#include <packing>\nvoid main() {\n	const float samples = float( VSM_SAMPLES );\n	float mean = 0.0;\n	float squared_mean = 0.0;\n	float uvStride = samples <= 1.0 ? 0.0 : 2.0 / ( samples - 1.0 );\n	float uvStart = samples <= 1.0 ? 0.0 : - 1.0;\n	for ( float i = 0.0; i < samples; i ++ ) {\n		float uvOffset = uvStart + i * uvStride;\n		#ifdef HORIZONTAL_PASS\n			vec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( uvOffset, 0.0 ) * radius ) / resolution ) );\n			mean += distribution.x;\n			squared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\n		#else\n			float depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, uvOffset ) * radius ) / resolution ) );\n			mean += depth;\n			squared_mean += depth * depth;\n		#endif\n	}\n	mean = mean / samples;\n	squared_mean = squared_mean / samples;\n	float std_dev = sqrt( squared_mean - mean * mean );\n	gl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\n}";
function WebGLShadowMap(_renderer, _objects, _capabilities) {
  let _frustum = new Frustum();
  const _shadowMapSize = new Vector2$1(), _viewportSize = new Vector2$1(), _viewport = new Vector4$1(), _depthMaterial = new MeshDepthMaterial({depthPacking: RGBADepthPacking}), _distanceMaterial = new MeshDistanceMaterial(), _materialCache = {}, _maxTextureSize = _capabilities.maxTextureSize;
  const shadowSide = {0: BackSide, 1: FrontSide, 2: DoubleSide};
  const shadowMaterialVertical = new ShaderMaterial({
    defines: {
      VSM_SAMPLES: 8
    },
    uniforms: {
      shadow_pass: {value: null},
      resolution: {value: new Vector2$1()},
      radius: {value: 4}
    },
    vertexShader: vertex,
    fragmentShader: fragment
  });
  const shadowMaterialHorizontal = shadowMaterialVertical.clone();
  shadowMaterialHorizontal.defines.HORIZONTAL_PASS = 1;
  const fullScreenTri = new BufferGeometry();
  fullScreenTri.setAttribute("position", new BufferAttribute(new Float32Array([-1, -1, 0.5, 3, -1, 0.5, -1, 3, 0.5]), 3));
  const fullScreenMesh = new Mesh(fullScreenTri, shadowMaterialVertical);
  const scope = this;
  this.enabled = false;
  this.autoUpdate = true;
  this.needsUpdate = false;
  this.type = PCFShadowMap;
  this.render = function(lights, scene, camera) {
    if (scope.enabled === false)
      return;
    if (scope.autoUpdate === false && scope.needsUpdate === false)
      return;
    if (lights.length === 0)
      return;
    const currentRenderTarget = _renderer.getRenderTarget();
    const activeCubeFace = _renderer.getActiveCubeFace();
    const activeMipmapLevel = _renderer.getActiveMipmapLevel();
    const _state = _renderer.state;
    _state.setBlending(NoBlending);
    _state.buffers.color.setClear(1, 1, 1, 1);
    _state.buffers.depth.setTest(true);
    _state.setScissorTest(false);
    for (let i = 0, il = lights.length; i < il; i++) {
      const light = lights[i];
      const shadow = light.shadow;
      if (shadow === void 0) {
        console.warn("THREE.WebGLShadowMap:", light, "has no shadow.");
        continue;
      }
      if (shadow.autoUpdate === false && shadow.needsUpdate === false)
        continue;
      _shadowMapSize.copy(shadow.mapSize);
      const shadowFrameExtents = shadow.getFrameExtents();
      _shadowMapSize.multiply(shadowFrameExtents);
      _viewportSize.copy(shadow.mapSize);
      if (_shadowMapSize.x > _maxTextureSize || _shadowMapSize.y > _maxTextureSize) {
        if (_shadowMapSize.x > _maxTextureSize) {
          _viewportSize.x = Math.floor(_maxTextureSize / shadowFrameExtents.x);
          _shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;
          shadow.mapSize.x = _viewportSize.x;
        }
        if (_shadowMapSize.y > _maxTextureSize) {
          _viewportSize.y = Math.floor(_maxTextureSize / shadowFrameExtents.y);
          _shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;
          shadow.mapSize.y = _viewportSize.y;
        }
      }
      if (shadow.map === null && !shadow.isPointLightShadow && this.type === VSMShadowMap) {
        const pars = {minFilter: LinearFilter, magFilter: LinearFilter, format: RGBAFormat};
        shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
        shadow.map.texture.name = light.name + ".shadowMap";
        shadow.mapPass = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
        shadow.camera.updateProjectionMatrix();
      }
      if (shadow.map === null) {
        const pars = {minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat};
        shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
        shadow.map.texture.name = light.name + ".shadowMap";
        shadow.camera.updateProjectionMatrix();
      }
      _renderer.setRenderTarget(shadow.map);
      _renderer.clear();
      const viewportCount = shadow.getViewportCount();
      for (let vp = 0; vp < viewportCount; vp++) {
        const viewport = shadow.getViewport(vp);
        _viewport.set(_viewportSize.x * viewport.x, _viewportSize.y * viewport.y, _viewportSize.x * viewport.z, _viewportSize.y * viewport.w);
        _state.viewport(_viewport);
        shadow.updateMatrices(light, vp);
        _frustum = shadow.getFrustum();
        renderObject(scene, camera, shadow.camera, light, this.type);
      }
      if (!shadow.isPointLightShadow && this.type === VSMShadowMap) {
        VSMPass(shadow, camera);
      }
      shadow.needsUpdate = false;
    }
    scope.needsUpdate = false;
    _renderer.setRenderTarget(currentRenderTarget, activeCubeFace, activeMipmapLevel);
  };
  function VSMPass(shadow, camera) {
    const geometry = _objects.update(fullScreenMesh);
    if (shadowMaterialVertical.defines.VSM_SAMPLES !== shadow.blurSamples) {
      shadowMaterialVertical.defines.VSM_SAMPLES = shadow.blurSamples;
      shadowMaterialHorizontal.defines.VSM_SAMPLES = shadow.blurSamples;
      shadowMaterialVertical.needsUpdate = true;
      shadowMaterialHorizontal.needsUpdate = true;
    }
    shadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;
    shadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;
    shadowMaterialVertical.uniforms.radius.value = shadow.radius;
    _renderer.setRenderTarget(shadow.mapPass);
    _renderer.clear();
    _renderer.renderBufferDirect(camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null);
    shadowMaterialHorizontal.uniforms.shadow_pass.value = shadow.mapPass.texture;
    shadowMaterialHorizontal.uniforms.resolution.value = shadow.mapSize;
    shadowMaterialHorizontal.uniforms.radius.value = shadow.radius;
    _renderer.setRenderTarget(shadow.map);
    _renderer.clear();
    _renderer.renderBufferDirect(camera, null, geometry, shadowMaterialHorizontal, fullScreenMesh, null);
  }
  function getDepthMaterial(object, geometry, material, light, shadowCameraNear, shadowCameraFar, type) {
    let result = null;
    const customMaterial = light.isPointLight === true ? object.customDistanceMaterial : object.customDepthMaterial;
    if (customMaterial !== void 0) {
      result = customMaterial;
    } else {
      result = light.isPointLight === true ? _distanceMaterial : _depthMaterial;
    }
    if (_renderer.localClippingEnabled && material.clipShadows === true && material.clippingPlanes.length !== 0 || material.displacementMap && material.displacementScale !== 0 || material.alphaMap && material.alphaTest > 0) {
      const keyA = result.uuid, keyB = material.uuid;
      let materialsForVariant = _materialCache[keyA];
      if (materialsForVariant === void 0) {
        materialsForVariant = {};
        _materialCache[keyA] = materialsForVariant;
      }
      let cachedMaterial = materialsForVariant[keyB];
      if (cachedMaterial === void 0) {
        cachedMaterial = result.clone();
        materialsForVariant[keyB] = cachedMaterial;
      }
      result = cachedMaterial;
    }
    result.visible = material.visible;
    result.wireframe = material.wireframe;
    if (type === VSMShadowMap) {
      result.side = material.shadowSide !== null ? material.shadowSide : material.side;
    } else {
      result.side = material.shadowSide !== null ? material.shadowSide : shadowSide[material.side];
    }
    result.alphaMap = material.alphaMap;
    result.alphaTest = material.alphaTest;
    result.clipShadows = material.clipShadows;
    result.clippingPlanes = material.clippingPlanes;
    result.clipIntersection = material.clipIntersection;
    result.displacementMap = material.displacementMap;
    result.displacementScale = material.displacementScale;
    result.displacementBias = material.displacementBias;
    result.wireframeLinewidth = material.wireframeLinewidth;
    result.linewidth = material.linewidth;
    if (light.isPointLight === true && result.isMeshDistanceMaterial === true) {
      result.referencePosition.setFromMatrixPosition(light.matrixWorld);
      result.nearDistance = shadowCameraNear;
      result.farDistance = shadowCameraFar;
    }
    return result;
  }
  function renderObject(object, camera, shadowCamera, light, type) {
    if (object.visible === false)
      return;
    const visible = object.layers.test(camera.layers);
    if (visible && (object.isMesh || object.isLine || object.isPoints)) {
      if ((object.castShadow || object.receiveShadow && type === VSMShadowMap) && (!object.frustumCulled || _frustum.intersectsObject(object))) {
        object.modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);
        const geometry = _objects.update(object);
        const material = object.material;
        if (Array.isArray(material)) {
          const groups = geometry.groups;
          for (let k = 0, kl = groups.length; k < kl; k++) {
            const group = groups[k];
            const groupMaterial = material[group.materialIndex];
            if (groupMaterial && groupMaterial.visible) {
              const depthMaterial = getDepthMaterial(object, geometry, groupMaterial, light, shadowCamera.near, shadowCamera.far, type);
              _renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, group);
            }
          }
        } else if (material.visible) {
          const depthMaterial = getDepthMaterial(object, geometry, material, light, shadowCamera.near, shadowCamera.far, type);
          _renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, null);
        }
      }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      renderObject(children[i], camera, shadowCamera, light, type);
    }
  }
}
function WebGLState(gl, extensions, capabilities) {
  const isWebGL2 = capabilities.isWebGL2;
  function ColorBuffer() {
    let locked = false;
    const color = new Vector4$1();
    let currentColorMask = null;
    const currentColorClear = new Vector4$1(0, 0, 0, 0);
    return {
      setMask: function(colorMask) {
        if (currentColorMask !== colorMask && !locked) {
          gl.colorMask(colorMask, colorMask, colorMask, colorMask);
          currentColorMask = colorMask;
        }
      },
      setLocked: function(lock) {
        locked = lock;
      },
      setClear: function(r, g, b, a, premultipliedAlpha) {
        if (premultipliedAlpha === true) {
          r *= a;
          g *= a;
          b *= a;
        }
        color.set(r, g, b, a);
        if (currentColorClear.equals(color) === false) {
          gl.clearColor(r, g, b, a);
          currentColorClear.copy(color);
        }
      },
      reset: function() {
        locked = false;
        currentColorMask = null;
        currentColorClear.set(-1, 0, 0, 0);
      }
    };
  }
  function DepthBuffer() {
    let locked = false;
    let currentDepthMask = null;
    let currentDepthFunc = null;
    let currentDepthClear = null;
    return {
      setTest: function(depthTest) {
        if (depthTest) {
          enable(2929);
        } else {
          disable(2929);
        }
      },
      setMask: function(depthMask) {
        if (currentDepthMask !== depthMask && !locked) {
          gl.depthMask(depthMask);
          currentDepthMask = depthMask;
        }
      },
      setFunc: function(depthFunc) {
        if (currentDepthFunc !== depthFunc) {
          if (depthFunc) {
            switch (depthFunc) {
              case NeverDepth:
                gl.depthFunc(512);
                break;
              case AlwaysDepth:
                gl.depthFunc(519);
                break;
              case LessDepth:
                gl.depthFunc(513);
                break;
              case LessEqualDepth:
                gl.depthFunc(515);
                break;
              case EqualDepth:
                gl.depthFunc(514);
                break;
              case GreaterEqualDepth:
                gl.depthFunc(518);
                break;
              case GreaterDepth:
                gl.depthFunc(516);
                break;
              case NotEqualDepth:
                gl.depthFunc(517);
                break;
              default:
                gl.depthFunc(515);
            }
          } else {
            gl.depthFunc(515);
          }
          currentDepthFunc = depthFunc;
        }
      },
      setLocked: function(lock) {
        locked = lock;
      },
      setClear: function(depth) {
        if (currentDepthClear !== depth) {
          gl.clearDepth(depth);
          currentDepthClear = depth;
        }
      },
      reset: function() {
        locked = false;
        currentDepthMask = null;
        currentDepthFunc = null;
        currentDepthClear = null;
      }
    };
  }
  function StencilBuffer() {
    let locked = false;
    let currentStencilMask = null;
    let currentStencilFunc = null;
    let currentStencilRef = null;
    let currentStencilFuncMask = null;
    let currentStencilFail = null;
    let currentStencilZFail = null;
    let currentStencilZPass = null;
    let currentStencilClear = null;
    return {
      setTest: function(stencilTest) {
        if (!locked) {
          if (stencilTest) {
            enable(2960);
          } else {
            disable(2960);
          }
        }
      },
      setMask: function(stencilMask) {
        if (currentStencilMask !== stencilMask && !locked) {
          gl.stencilMask(stencilMask);
          currentStencilMask = stencilMask;
        }
      },
      setFunc: function(stencilFunc, stencilRef, stencilMask) {
        if (currentStencilFunc !== stencilFunc || currentStencilRef !== stencilRef || currentStencilFuncMask !== stencilMask) {
          gl.stencilFunc(stencilFunc, stencilRef, stencilMask);
          currentStencilFunc = stencilFunc;
          currentStencilRef = stencilRef;
          currentStencilFuncMask = stencilMask;
        }
      },
      setOp: function(stencilFail, stencilZFail, stencilZPass) {
        if (currentStencilFail !== stencilFail || currentStencilZFail !== stencilZFail || currentStencilZPass !== stencilZPass) {
          gl.stencilOp(stencilFail, stencilZFail, stencilZPass);
          currentStencilFail = stencilFail;
          currentStencilZFail = stencilZFail;
          currentStencilZPass = stencilZPass;
        }
      },
      setLocked: function(lock) {
        locked = lock;
      },
      setClear: function(stencil) {
        if (currentStencilClear !== stencil) {
          gl.clearStencil(stencil);
          currentStencilClear = stencil;
        }
      },
      reset: function() {
        locked = false;
        currentStencilMask = null;
        currentStencilFunc = null;
        currentStencilRef = null;
        currentStencilFuncMask = null;
        currentStencilFail = null;
        currentStencilZFail = null;
        currentStencilZPass = null;
        currentStencilClear = null;
      }
    };
  }
  const colorBuffer = new ColorBuffer();
  const depthBuffer = new DepthBuffer();
  const stencilBuffer = new StencilBuffer();
  let enabledCapabilities = {};
  let currentBoundFramebuffers = {};
  let currentDrawbuffers = new WeakMap();
  let defaultDrawbuffers = [];
  let currentProgram = null;
  let currentBlendingEnabled = false;
  let currentBlending = null;
  let currentBlendEquation = null;
  let currentBlendSrc = null;
  let currentBlendDst = null;
  let currentBlendEquationAlpha = null;
  let currentBlendSrcAlpha = null;
  let currentBlendDstAlpha = null;
  let currentPremultipledAlpha = false;
  let currentFlipSided = null;
  let currentCullFace = null;
  let currentLineWidth = null;
  let currentPolygonOffsetFactor = null;
  let currentPolygonOffsetUnits = null;
  const maxTextures = gl.getParameter(35661);
  let lineWidthAvailable = false;
  let version = 0;
  const glVersion = gl.getParameter(7938);
  if (glVersion.indexOf("WebGL") !== -1) {
    version = parseFloat(/^WebGL (\d)/.exec(glVersion)[1]);
    lineWidthAvailable = version >= 1;
  } else if (glVersion.indexOf("OpenGL ES") !== -1) {
    version = parseFloat(/^OpenGL ES (\d)/.exec(glVersion)[1]);
    lineWidthAvailable = version >= 2;
  }
  let currentTextureSlot = null;
  let currentBoundTextures = {};
  const scissorParam = gl.getParameter(3088);
  const viewportParam = gl.getParameter(2978);
  const currentScissor = new Vector4$1().fromArray(scissorParam);
  const currentViewport = new Vector4$1().fromArray(viewportParam);
  function createTexture(type, target, count) {
    const data = new Uint8Array(4);
    const texture = gl.createTexture();
    gl.bindTexture(type, texture);
    gl.texParameteri(type, 10241, 9728);
    gl.texParameteri(type, 10240, 9728);
    for (let i = 0; i < count; i++) {
      gl.texImage2D(target + i, 0, 6408, 1, 1, 0, 6408, 5121, data);
    }
    return texture;
  }
  const emptyTextures = {};
  emptyTextures[3553] = createTexture(3553, 3553, 1);
  emptyTextures[34067] = createTexture(34067, 34069, 6);
  colorBuffer.setClear(0, 0, 0, 1);
  depthBuffer.setClear(1);
  stencilBuffer.setClear(0);
  enable(2929);
  depthBuffer.setFunc(LessEqualDepth);
  setFlipSided(false);
  setCullFace(CullFaceBack);
  enable(2884);
  setBlending(NoBlending);
  function enable(id) {
    if (enabledCapabilities[id] !== true) {
      gl.enable(id);
      enabledCapabilities[id] = true;
    }
  }
  function disable(id) {
    if (enabledCapabilities[id] !== false) {
      gl.disable(id);
      enabledCapabilities[id] = false;
    }
  }
  function bindFramebuffer(target, framebuffer) {
    if (currentBoundFramebuffers[target] !== framebuffer) {
      gl.bindFramebuffer(target, framebuffer);
      currentBoundFramebuffers[target] = framebuffer;
      if (isWebGL2) {
        if (target === 36009) {
          currentBoundFramebuffers[36160] = framebuffer;
        }
        if (target === 36160) {
          currentBoundFramebuffers[36009] = framebuffer;
        }
      }
      return true;
    }
    return false;
  }
  function drawBuffers(renderTarget, framebuffer) {
    let drawBuffers2 = defaultDrawbuffers;
    let needsUpdate = false;
    if (renderTarget) {
      drawBuffers2 = currentDrawbuffers.get(framebuffer);
      if (drawBuffers2 === void 0) {
        drawBuffers2 = [];
        currentDrawbuffers.set(framebuffer, drawBuffers2);
      }
      if (renderTarget.isWebGLMultipleRenderTargets) {
        const textures = renderTarget.texture;
        if (drawBuffers2.length !== textures.length || drawBuffers2[0] !== 36064) {
          for (let i = 0, il = textures.length; i < il; i++) {
            drawBuffers2[i] = 36064 + i;
          }
          drawBuffers2.length = textures.length;
          needsUpdate = true;
        }
      } else {
        if (drawBuffers2[0] !== 36064) {
          drawBuffers2[0] = 36064;
          needsUpdate = true;
        }
      }
    } else {
      if (drawBuffers2[0] !== 1029) {
        drawBuffers2[0] = 1029;
        needsUpdate = true;
      }
    }
    if (needsUpdate) {
      if (capabilities.isWebGL2) {
        gl.drawBuffers(drawBuffers2);
      } else {
        extensions.get("WEBGL_draw_buffers").drawBuffersWEBGL(drawBuffers2);
      }
    }
  }
  function useProgram(program) {
    if (currentProgram !== program) {
      gl.useProgram(program);
      currentProgram = program;
      return true;
    }
    return false;
  }
  const equationToGL = {
    [AddEquation]: 32774,
    [SubtractEquation]: 32778,
    [ReverseSubtractEquation]: 32779
  };
  if (isWebGL2) {
    equationToGL[MinEquation] = 32775;
    equationToGL[MaxEquation] = 32776;
  } else {
    const extension = extensions.get("EXT_blend_minmax");
    if (extension !== null) {
      equationToGL[MinEquation] = extension.MIN_EXT;
      equationToGL[MaxEquation] = extension.MAX_EXT;
    }
  }
  const factorToGL = {
    [ZeroFactor]: 0,
    [OneFactor]: 1,
    [SrcColorFactor]: 768,
    [SrcAlphaFactor]: 770,
    [SrcAlphaSaturateFactor]: 776,
    [DstColorFactor]: 774,
    [DstAlphaFactor]: 772,
    [OneMinusSrcColorFactor]: 769,
    [OneMinusSrcAlphaFactor]: 771,
    [OneMinusDstColorFactor]: 775,
    [OneMinusDstAlphaFactor]: 773
  };
  function setBlending(blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha) {
    if (blending === NoBlending) {
      if (currentBlendingEnabled === true) {
        disable(3042);
        currentBlendingEnabled = false;
      }
      return;
    }
    if (currentBlendingEnabled === false) {
      enable(3042);
      currentBlendingEnabled = true;
    }
    if (blending !== CustomBlending) {
      if (blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha) {
        if (currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation) {
          gl.blendEquation(32774);
          currentBlendEquation = AddEquation;
          currentBlendEquationAlpha = AddEquation;
        }
        if (premultipliedAlpha) {
          switch (blending) {
            case NormalBlending:
              gl.blendFuncSeparate(1, 771, 1, 771);
              break;
            case AdditiveBlending:
              gl.blendFunc(1, 1);
              break;
            case SubtractiveBlending:
              gl.blendFuncSeparate(0, 769, 0, 1);
              break;
            case MultiplyBlending:
              gl.blendFuncSeparate(0, 768, 0, 770);
              break;
            default:
              console.error("THREE.WebGLState: Invalid blending: ", blending);
              break;
          }
        } else {
          switch (blending) {
            case NormalBlending:
              gl.blendFuncSeparate(770, 771, 1, 771);
              break;
            case AdditiveBlending:
              gl.blendFunc(770, 1);
              break;
            case SubtractiveBlending:
              gl.blendFuncSeparate(0, 769, 0, 1);
              break;
            case MultiplyBlending:
              gl.blendFunc(0, 768);
              break;
            default:
              console.error("THREE.WebGLState: Invalid blending: ", blending);
              break;
          }
        }
        currentBlendSrc = null;
        currentBlendDst = null;
        currentBlendSrcAlpha = null;
        currentBlendDstAlpha = null;
        currentBlending = blending;
        currentPremultipledAlpha = premultipliedAlpha;
      }
      return;
    }
    blendEquationAlpha = blendEquationAlpha || blendEquation;
    blendSrcAlpha = blendSrcAlpha || blendSrc;
    blendDstAlpha = blendDstAlpha || blendDst;
    if (blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha) {
      gl.blendEquationSeparate(equationToGL[blendEquation], equationToGL[blendEquationAlpha]);
      currentBlendEquation = blendEquation;
      currentBlendEquationAlpha = blendEquationAlpha;
    }
    if (blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha) {
      gl.blendFuncSeparate(factorToGL[blendSrc], factorToGL[blendDst], factorToGL[blendSrcAlpha], factorToGL[blendDstAlpha]);
      currentBlendSrc = blendSrc;
      currentBlendDst = blendDst;
      currentBlendSrcAlpha = blendSrcAlpha;
      currentBlendDstAlpha = blendDstAlpha;
    }
    currentBlending = blending;
    currentPremultipledAlpha = null;
  }
  function setMaterial(material, frontFaceCW) {
    material.side === DoubleSide ? disable(2884) : enable(2884);
    let flipSided = material.side === BackSide;
    if (frontFaceCW)
      flipSided = !flipSided;
    setFlipSided(flipSided);
    material.blending === NormalBlending && material.transparent === false ? setBlending(NoBlending) : setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha);
    depthBuffer.setFunc(material.depthFunc);
    depthBuffer.setTest(material.depthTest);
    depthBuffer.setMask(material.depthWrite);
    colorBuffer.setMask(material.colorWrite);
    const stencilWrite = material.stencilWrite;
    stencilBuffer.setTest(stencilWrite);
    if (stencilWrite) {
      stencilBuffer.setMask(material.stencilWriteMask);
      stencilBuffer.setFunc(material.stencilFunc, material.stencilRef, material.stencilFuncMask);
      stencilBuffer.setOp(material.stencilFail, material.stencilZFail, material.stencilZPass);
    }
    setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);
    material.alphaToCoverage === true ? enable(32926) : disable(32926);
  }
  function setFlipSided(flipSided) {
    if (currentFlipSided !== flipSided) {
      if (flipSided) {
        gl.frontFace(2304);
      } else {
        gl.frontFace(2305);
      }
      currentFlipSided = flipSided;
    }
  }
  function setCullFace(cullFace) {
    if (cullFace !== CullFaceNone) {
      enable(2884);
      if (cullFace !== currentCullFace) {
        if (cullFace === CullFaceBack) {
          gl.cullFace(1029);
        } else if (cullFace === CullFaceFront) {
          gl.cullFace(1028);
        } else {
          gl.cullFace(1032);
        }
      }
    } else {
      disable(2884);
    }
    currentCullFace = cullFace;
  }
  function setLineWidth(width) {
    if (width !== currentLineWidth) {
      if (lineWidthAvailable)
        gl.lineWidth(width);
      currentLineWidth = width;
    }
  }
  function setPolygonOffset(polygonOffset, factor, units) {
    if (polygonOffset) {
      enable(32823);
      if (currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units) {
        gl.polygonOffset(factor, units);
        currentPolygonOffsetFactor = factor;
        currentPolygonOffsetUnits = units;
      }
    } else {
      disable(32823);
    }
  }
  function setScissorTest(scissorTest) {
    if (scissorTest) {
      enable(3089);
    } else {
      disable(3089);
    }
  }
  function activeTexture(webglSlot) {
    if (webglSlot === void 0)
      webglSlot = 33984 + maxTextures - 1;
    if (currentTextureSlot !== webglSlot) {
      gl.activeTexture(webglSlot);
      currentTextureSlot = webglSlot;
    }
  }
  function bindTexture(webglType, webglTexture) {
    if (currentTextureSlot === null) {
      activeTexture();
    }
    let boundTexture = currentBoundTextures[currentTextureSlot];
    if (boundTexture === void 0) {
      boundTexture = {type: void 0, texture: void 0};
      currentBoundTextures[currentTextureSlot] = boundTexture;
    }
    if (boundTexture.type !== webglType || boundTexture.texture !== webglTexture) {
      gl.bindTexture(webglType, webglTexture || emptyTextures[webglType]);
      boundTexture.type = webglType;
      boundTexture.texture = webglTexture;
    }
  }
  function unbindTexture() {
    const boundTexture = currentBoundTextures[currentTextureSlot];
    if (boundTexture !== void 0 && boundTexture.type !== void 0) {
      gl.bindTexture(boundTexture.type, null);
      boundTexture.type = void 0;
      boundTexture.texture = void 0;
    }
  }
  function compressedTexImage2D() {
    try {
      gl.compressedTexImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texSubImage2D() {
    try {
      gl.texSubImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texSubImage3D() {
    try {
      gl.texSubImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function compressedTexSubImage2D() {
    try {
      gl.compressedTexSubImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texStorage2D() {
    try {
      gl.texStorage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texStorage3D() {
    try {
      gl.texStorage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texImage2D() {
    try {
      gl.texImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function texImage3D() {
    try {
      gl.texImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  function scissor(scissor2) {
    if (currentScissor.equals(scissor2) === false) {
      gl.scissor(scissor2.x, scissor2.y, scissor2.z, scissor2.w);
      currentScissor.copy(scissor2);
    }
  }
  function viewport(viewport2) {
    if (currentViewport.equals(viewport2) === false) {
      gl.viewport(viewport2.x, viewport2.y, viewport2.z, viewport2.w);
      currentViewport.copy(viewport2);
    }
  }
  function reset() {
    gl.disable(3042);
    gl.disable(2884);
    gl.disable(2929);
    gl.disable(32823);
    gl.disable(3089);
    gl.disable(2960);
    gl.disable(32926);
    gl.blendEquation(32774);
    gl.blendFunc(1, 0);
    gl.blendFuncSeparate(1, 0, 1, 0);
    gl.colorMask(true, true, true, true);
    gl.clearColor(0, 0, 0, 0);
    gl.depthMask(true);
    gl.depthFunc(513);
    gl.clearDepth(1);
    gl.stencilMask(4294967295);
    gl.stencilFunc(519, 0, 4294967295);
    gl.stencilOp(7680, 7680, 7680);
    gl.clearStencil(0);
    gl.cullFace(1029);
    gl.frontFace(2305);
    gl.polygonOffset(0, 0);
    gl.activeTexture(33984);
    gl.bindFramebuffer(36160, null);
    if (isWebGL2 === true) {
      gl.bindFramebuffer(36009, null);
      gl.bindFramebuffer(36008, null);
    }
    gl.useProgram(null);
    gl.lineWidth(1);
    gl.scissor(0, 0, gl.canvas.width, gl.canvas.height);
    gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
    enabledCapabilities = {};
    currentTextureSlot = null;
    currentBoundTextures = {};
    currentBoundFramebuffers = {};
    currentDrawbuffers = new WeakMap();
    defaultDrawbuffers = [];
    currentProgram = null;
    currentBlendingEnabled = false;
    currentBlending = null;
    currentBlendEquation = null;
    currentBlendSrc = null;
    currentBlendDst = null;
    currentBlendEquationAlpha = null;
    currentBlendSrcAlpha = null;
    currentBlendDstAlpha = null;
    currentPremultipledAlpha = false;
    currentFlipSided = null;
    currentCullFace = null;
    currentLineWidth = null;
    currentPolygonOffsetFactor = null;
    currentPolygonOffsetUnits = null;
    currentScissor.set(0, 0, gl.canvas.width, gl.canvas.height);
    currentViewport.set(0, 0, gl.canvas.width, gl.canvas.height);
    colorBuffer.reset();
    depthBuffer.reset();
    stencilBuffer.reset();
  }
  return {
    buffers: {
      color: colorBuffer,
      depth: depthBuffer,
      stencil: stencilBuffer
    },
    enable,
    disable,
    bindFramebuffer,
    drawBuffers,
    useProgram,
    setBlending,
    setMaterial,
    setFlipSided,
    setCullFace,
    setLineWidth,
    setPolygonOffset,
    setScissorTest,
    activeTexture,
    bindTexture,
    unbindTexture,
    compressedTexImage2D,
    texImage2D,
    texImage3D,
    texStorage2D,
    texStorage3D,
    texSubImage2D,
    texSubImage3D,
    compressedTexSubImage2D,
    scissor,
    viewport,
    reset
  };
}
function WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info) {
  const isWebGL2 = capabilities.isWebGL2;
  const maxTextures = capabilities.maxTextures;
  const maxCubemapSize = capabilities.maxCubemapSize;
  const maxTextureSize = capabilities.maxTextureSize;
  const maxSamples = capabilities.maxSamples;
  const hasMultisampledRenderToTexture = extensions.has("WEBGL_multisampled_render_to_texture");
  const MultisampledRenderToTextureExtension = hasMultisampledRenderToTexture ? extensions.get("WEBGL_multisampled_render_to_texture") : void 0;
  const _videoTextures = new WeakMap();
  let _canvas2;
  let useOffscreenCanvas = false;
  try {
    useOffscreenCanvas = typeof OffscreenCanvas !== "undefined" && new OffscreenCanvas(1, 1).getContext("2d") !== null;
  } catch (err) {
  }
  function createCanvas(width, height) {
    return useOffscreenCanvas ? new OffscreenCanvas(width, height) : createElementNS("canvas");
  }
  function resizeImage(image, needsPowerOfTwo, needsNewCanvas, maxSize) {
    let scale = 1;
    if (image.width > maxSize || image.height > maxSize) {
      scale = maxSize / Math.max(image.width, image.height);
    }
    if (scale < 1 || needsPowerOfTwo === true) {
      if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap) {
        const floor = needsPowerOfTwo ? floorPowerOfTwo : Math.floor;
        const width = floor(scale * image.width);
        const height = floor(scale * image.height);
        if (_canvas2 === void 0)
          _canvas2 = createCanvas(width, height);
        const canvas = needsNewCanvas ? createCanvas(width, height) : _canvas2;
        canvas.width = width;
        canvas.height = height;
        const context = canvas.getContext("2d");
        context.drawImage(image, 0, 0, width, height);
        console.warn("THREE.WebGLRenderer: Texture has been resized from (" + image.width + "x" + image.height + ") to (" + width + "x" + height + ").");
        return canvas;
      } else {
        if ("data" in image) {
          console.warn("THREE.WebGLRenderer: Image in DataTexture is too big (" + image.width + "x" + image.height + ").");
        }
        return image;
      }
    }
    return image;
  }
  function isPowerOfTwo$1(image) {
    return isPowerOfTwo(image.width) && isPowerOfTwo(image.height);
  }
  function textureNeedsPowerOfTwo(texture) {
    if (isWebGL2)
      return false;
    return texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping || texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
  }
  function textureNeedsGenerateMipmaps(texture, supportsMips) {
    return texture.generateMipmaps && supportsMips && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
  }
  function generateMipmap(target) {
    _gl.generateMipmap(target);
  }
  function getInternalFormat(internalFormatName, glFormat, glType, encoding, isVideoTexture = false) {
    if (isWebGL2 === false)
      return glFormat;
    if (internalFormatName !== null) {
      if (_gl[internalFormatName] !== void 0)
        return _gl[internalFormatName];
      console.warn("THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format '" + internalFormatName + "'");
    }
    let internalFormat = glFormat;
    if (glFormat === 6403) {
      if (glType === 5126)
        internalFormat = 33326;
      if (glType === 5131)
        internalFormat = 33325;
      if (glType === 5121)
        internalFormat = 33321;
    }
    if (glFormat === 33319) {
      if (glType === 5126)
        internalFormat = 33328;
      if (glType === 5131)
        internalFormat = 33327;
      if (glType === 5121)
        internalFormat = 33323;
    }
    if (glFormat === 6408) {
      if (glType === 5126)
        internalFormat = 34836;
      if (glType === 5131)
        internalFormat = 34842;
      if (glType === 5121)
        internalFormat = encoding === sRGBEncoding && isVideoTexture === false ? 35907 : 32856;
      if (glType === 32819)
        internalFormat = 32854;
      if (glType === 32820)
        internalFormat = 32855;
    }
    if (internalFormat === 33325 || internalFormat === 33326 || internalFormat === 33327 || internalFormat === 33328 || internalFormat === 34842 || internalFormat === 34836) {
      extensions.get("EXT_color_buffer_float");
    }
    return internalFormat;
  }
  function getMipLevels(texture, image, supportsMips) {
    if (textureNeedsGenerateMipmaps(texture, supportsMips) === true || texture.isFramebufferTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
      return Math.log2(Math.max(image.width, image.height)) + 1;
    } else if (texture.mipmaps !== void 0 && texture.mipmaps.length > 0) {
      return texture.mipmaps.length;
    } else if (texture.isCompressedTexture && Array.isArray(texture.image)) {
      return image.mipmaps.length;
    } else {
      return 1;
    }
  }
  function filterFallback(f) {
    if (f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter) {
      return 9728;
    }
    return 9729;
  }
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    deallocateTexture(texture);
    if (texture.isVideoTexture) {
      _videoTextures.delete(texture);
    }
    info.memory.textures--;
  }
  function onRenderTargetDispose(event) {
    const renderTarget = event.target;
    renderTarget.removeEventListener("dispose", onRenderTargetDispose);
    deallocateRenderTarget(renderTarget);
  }
  function deallocateTexture(texture) {
    const textureProperties = properties.get(texture);
    if (textureProperties.__webglInit === void 0)
      return;
    _gl.deleteTexture(textureProperties.__webglTexture);
    properties.remove(texture);
  }
  function deallocateRenderTarget(renderTarget) {
    const texture = renderTarget.texture;
    const renderTargetProperties = properties.get(renderTarget);
    const textureProperties = properties.get(texture);
    if (!renderTarget)
      return;
    if (textureProperties.__webglTexture !== void 0) {
      _gl.deleteTexture(textureProperties.__webglTexture);
      info.memory.textures--;
    }
    if (renderTarget.depthTexture) {
      renderTarget.depthTexture.dispose();
    }
    if (renderTarget.isWebGLCubeRenderTarget) {
      for (let i = 0; i < 6; i++) {
        _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[i]);
        if (renderTargetProperties.__webglDepthbuffer)
          _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer[i]);
      }
    } else {
      _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer);
      if (renderTargetProperties.__webglDepthbuffer)
        _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer);
      if (renderTargetProperties.__webglMultisampledFramebuffer)
        _gl.deleteFramebuffer(renderTargetProperties.__webglMultisampledFramebuffer);
      if (renderTargetProperties.__webglColorRenderbuffer)
        _gl.deleteRenderbuffer(renderTargetProperties.__webglColorRenderbuffer);
      if (renderTargetProperties.__webglDepthRenderbuffer)
        _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthRenderbuffer);
    }
    if (renderTarget.isWebGLMultipleRenderTargets) {
      for (let i = 0, il = texture.length; i < il; i++) {
        const attachmentProperties = properties.get(texture[i]);
        if (attachmentProperties.__webglTexture) {
          _gl.deleteTexture(attachmentProperties.__webglTexture);
          info.memory.textures--;
        }
        properties.remove(texture[i]);
      }
    }
    properties.remove(texture);
    properties.remove(renderTarget);
  }
  let textureUnits = 0;
  function resetTextureUnits() {
    textureUnits = 0;
  }
  function allocateTextureUnit() {
    const textureUnit = textureUnits;
    if (textureUnit >= maxTextures) {
      console.warn("THREE.WebGLTextures: Trying to use " + textureUnit + " texture units while this GPU supports only " + maxTextures);
    }
    textureUnits += 1;
    return textureUnit;
  }
  function setTexture2D(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.isVideoTexture)
      updateVideoTexture(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      const image = texture.image;
      if (image === void 0) {
        console.warn("THREE.WebGLRenderer: Texture marked for update but image is undefined");
      } else if (image.complete === false) {
        console.warn("THREE.WebGLRenderer: Texture marked for update but image is incomplete");
      } else {
        uploadTexture(textureProperties, texture, slot);
        return;
      }
    }
    state.activeTexture(33984 + slot);
    state.bindTexture(3553, textureProperties.__webglTexture);
  }
  function setTexture2DArray(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadTexture(textureProperties, texture, slot);
      return;
    }
    state.activeTexture(33984 + slot);
    state.bindTexture(35866, textureProperties.__webglTexture);
  }
  function setTexture3D(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadTexture(textureProperties, texture, slot);
      return;
    }
    state.activeTexture(33984 + slot);
    state.bindTexture(32879, textureProperties.__webglTexture);
  }
  function setTextureCube(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadCubeTexture(textureProperties, texture, slot);
      return;
    }
    state.activeTexture(33984 + slot);
    state.bindTexture(34067, textureProperties.__webglTexture);
  }
  const wrappingToGL = {
    [RepeatWrapping]: 10497,
    [ClampToEdgeWrapping]: 33071,
    [MirroredRepeatWrapping]: 33648
  };
  const filterToGL = {
    [NearestFilter]: 9728,
    [NearestMipmapNearestFilter]: 9984,
    [NearestMipmapLinearFilter]: 9986,
    [LinearFilter]: 9729,
    [LinearMipmapNearestFilter]: 9985,
    [LinearMipmapLinearFilter]: 9987
  };
  function setTextureParameters(textureType, texture, supportsMips) {
    if (supportsMips) {
      _gl.texParameteri(textureType, 10242, wrappingToGL[texture.wrapS]);
      _gl.texParameteri(textureType, 10243, wrappingToGL[texture.wrapT]);
      if (textureType === 32879 || textureType === 35866) {
        _gl.texParameteri(textureType, 32882, wrappingToGL[texture.wrapR]);
      }
      _gl.texParameteri(textureType, 10240, filterToGL[texture.magFilter]);
      _gl.texParameteri(textureType, 10241, filterToGL[texture.minFilter]);
    } else {
      _gl.texParameteri(textureType, 10242, 33071);
      _gl.texParameteri(textureType, 10243, 33071);
      if (textureType === 32879 || textureType === 35866) {
        _gl.texParameteri(textureType, 32882, 33071);
      }
      if (texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping) {
        console.warn("THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.");
      }
      _gl.texParameteri(textureType, 10240, filterFallback(texture.magFilter));
      _gl.texParameteri(textureType, 10241, filterFallback(texture.minFilter));
      if (texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
        console.warn("THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.");
      }
    }
    if (extensions.has("EXT_texture_filter_anisotropic") === true) {
      const extension = extensions.get("EXT_texture_filter_anisotropic");
      if (texture.type === FloatType && extensions.has("OES_texture_float_linear") === false)
        return;
      if (isWebGL2 === false && (texture.type === HalfFloatType && extensions.has("OES_texture_half_float_linear") === false))
        return;
      if (texture.anisotropy > 1 || properties.get(texture).__currentAnisotropy) {
        _gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, capabilities.getMaxAnisotropy()));
        properties.get(texture).__currentAnisotropy = texture.anisotropy;
      }
    }
  }
  function initTexture(textureProperties, texture) {
    if (textureProperties.__webglInit === void 0) {
      textureProperties.__webglInit = true;
      texture.addEventListener("dispose", onTextureDispose);
      textureProperties.__webglTexture = _gl.createTexture();
      info.memory.textures++;
    }
  }
  function uploadTexture(textureProperties, texture, slot) {
    let textureType = 3553;
    if (texture.isDataTexture2DArray)
      textureType = 35866;
    if (texture.isDataTexture3D)
      textureType = 32879;
    initTexture(textureProperties, texture);
    state.activeTexture(33984 + slot);
    state.bindTexture(textureType, textureProperties.__webglTexture);
    _gl.pixelStorei(37440, texture.flipY);
    _gl.pixelStorei(37441, texture.premultiplyAlpha);
    _gl.pixelStorei(3317, texture.unpackAlignment);
    _gl.pixelStorei(37443, 0);
    const needsPowerOfTwo = textureNeedsPowerOfTwo(texture) && isPowerOfTwo$1(texture.image) === false;
    let image = resizeImage(texture.image, needsPowerOfTwo, false, maxTextureSize);
    image = verifyColorSpace(texture, image);
    const supportsMips = isPowerOfTwo$1(image) || isWebGL2, glFormat = utils.convert(texture.format, texture.encoding);
    let glType = utils.convert(texture.type), glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding, texture.isVideoTexture);
    setTextureParameters(textureType, texture, supportsMips);
    let mipmap;
    const mipmaps = texture.mipmaps;
    const useTexStorage = isWebGL2 && texture.isVideoTexture !== true;
    const allocateMemory = textureProperties.__version === void 0;
    const levels = getMipLevels(texture, image, supportsMips);
    if (texture.isDepthTexture) {
      glInternalFormat = 6402;
      if (isWebGL2) {
        if (texture.type === FloatType) {
          glInternalFormat = 36012;
        } else if (texture.type === UnsignedIntType) {
          glInternalFormat = 33190;
        } else if (texture.type === UnsignedInt248Type) {
          glInternalFormat = 35056;
        } else {
          glInternalFormat = 33189;
        }
      } else {
        if (texture.type === FloatType) {
          console.error("WebGLRenderer: Floating point depth texture requires WebGL2.");
        }
      }
      if (texture.format === DepthFormat && glInternalFormat === 6402) {
        if (texture.type !== UnsignedShortType && texture.type !== UnsignedIntType) {
          console.warn("THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.");
          texture.type = UnsignedShortType;
          glType = utils.convert(texture.type);
        }
      }
      if (texture.format === DepthStencilFormat && glInternalFormat === 6402) {
        glInternalFormat = 34041;
        if (texture.type !== UnsignedInt248Type) {
          console.warn("THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.");
          texture.type = UnsignedInt248Type;
          glType = utils.convert(texture.type);
        }
      }
      if (useTexStorage && allocateMemory) {
        state.texStorage2D(3553, 1, glInternalFormat, image.width, image.height);
      } else {
        state.texImage2D(3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null);
      }
    } else if (texture.isDataTexture) {
      if (mipmaps.length > 0 && supportsMips) {
        if (useTexStorage && allocateMemory) {
          state.texStorage2D(3553, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
        }
        for (let i = 0, il = mipmaps.length; i < il; i++) {
          mipmap = mipmaps[i];
          if (useTexStorage) {
            state.texSubImage2D(3553, 0, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
          } else {
            state.texImage2D(3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
          }
        }
        texture.generateMipmaps = false;
      } else {
        if (useTexStorage) {
          if (allocateMemory) {
            state.texStorage2D(3553, levels, glInternalFormat, image.width, image.height);
          }
          state.texSubImage2D(3553, 0, 0, 0, image.width, image.height, glFormat, glType, image.data);
        } else {
          state.texImage2D(3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data);
        }
      }
    } else if (texture.isCompressedTexture) {
      if (useTexStorage && allocateMemory) {
        state.texStorage2D(3553, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
      }
      for (let i = 0, il = mipmaps.length; i < il; i++) {
        mipmap = mipmaps[i];
        if (texture.format !== RGBAFormat) {
          if (glFormat !== null) {
            if (useTexStorage) {
              state.compressedTexSubImage2D(3553, i, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
            } else {
              state.compressedTexImage2D(3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
            }
          } else {
            console.warn("THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()");
          }
        } else {
          if (useTexStorage) {
            state.texSubImage2D(3553, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
          } else {
            state.texImage2D(3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
          }
        }
      }
    } else if (texture.isDataTexture2DArray) {
      if (useTexStorage) {
        if (allocateMemory) {
          state.texStorage3D(35866, levels, glInternalFormat, image.width, image.height, image.depth);
        }
        state.texSubImage3D(35866, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
      } else {
        state.texImage3D(35866, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
      }
    } else if (texture.isDataTexture3D) {
      if (useTexStorage) {
        if (allocateMemory) {
          state.texStorage3D(32879, levels, glInternalFormat, image.width, image.height, image.depth);
        }
        state.texSubImage3D(32879, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
      } else {
        state.texImage3D(32879, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
      }
    } else if (texture.isFramebufferTexture) {
      if (useTexStorage && allocateMemory) {
        state.texStorage2D(3553, levels, glInternalFormat, image.width, image.height);
      } else {
        state.texImage2D(3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null);
      }
    } else {
      if (mipmaps.length > 0 && supportsMips) {
        if (useTexStorage && allocateMemory) {
          state.texStorage2D(3553, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
        }
        for (let i = 0, il = mipmaps.length; i < il; i++) {
          mipmap = mipmaps[i];
          if (useTexStorage) {
            state.texSubImage2D(3553, i, 0, 0, glFormat, glType, mipmap);
          } else {
            state.texImage2D(3553, i, glInternalFormat, glFormat, glType, mipmap);
          }
        }
        texture.generateMipmaps = false;
      } else {
        if (useTexStorage) {
          if (allocateMemory) {
            state.texStorage2D(3553, levels, glInternalFormat, image.width, image.height);
          }
          state.texSubImage2D(3553, 0, 0, 0, glFormat, glType, image);
        } else {
          state.texImage2D(3553, 0, glInternalFormat, glFormat, glType, image);
        }
      }
    }
    if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
      generateMipmap(textureType);
    }
    textureProperties.__version = texture.version;
    if (texture.onUpdate)
      texture.onUpdate(texture);
  }
  function uploadCubeTexture(textureProperties, texture, slot) {
    if (texture.image.length !== 6)
      return;
    initTexture(textureProperties, texture);
    state.activeTexture(33984 + slot);
    state.bindTexture(34067, textureProperties.__webglTexture);
    _gl.pixelStorei(37440, texture.flipY);
    _gl.pixelStorei(37441, texture.premultiplyAlpha);
    _gl.pixelStorei(3317, texture.unpackAlignment);
    _gl.pixelStorei(37443, 0);
    const isCompressed = texture && (texture.isCompressedTexture || texture.image[0].isCompressedTexture);
    const isDataTexture = texture.image[0] && texture.image[0].isDataTexture;
    const cubeImage = [];
    for (let i = 0; i < 6; i++) {
      if (!isCompressed && !isDataTexture) {
        cubeImage[i] = resizeImage(texture.image[i], false, true, maxCubemapSize);
      } else {
        cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];
      }
      cubeImage[i] = verifyColorSpace(texture, cubeImage[i]);
    }
    const image = cubeImage[0], supportsMips = isPowerOfTwo$1(image) || isWebGL2, glFormat = utils.convert(texture.format, texture.encoding), glType = utils.convert(texture.type), glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
    const useTexStorage = isWebGL2 && texture.isVideoTexture !== true;
    const allocateMemory = textureProperties.__version === void 0;
    let levels = getMipLevels(texture, image, supportsMips);
    setTextureParameters(34067, texture, supportsMips);
    let mipmaps;
    if (isCompressed) {
      if (useTexStorage && allocateMemory) {
        state.texStorage2D(34067, levels, glInternalFormat, image.width, image.height);
      }
      for (let i = 0; i < 6; i++) {
        mipmaps = cubeImage[i].mipmaps;
        for (let j = 0; j < mipmaps.length; j++) {
          const mipmap = mipmaps[j];
          if (texture.format !== RGBAFormat) {
            if (glFormat !== null) {
              if (useTexStorage) {
                state.compressedTexSubImage2D(34069 + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
              } else {
                state.compressedTexImage2D(34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
              }
            } else {
              console.warn("THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()");
            }
          } else {
            if (useTexStorage) {
              state.texSubImage2D(34069 + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
            } else {
              state.texImage2D(34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
            }
          }
        }
      }
    } else {
      mipmaps = texture.mipmaps;
      if (useTexStorage && allocateMemory) {
        if (mipmaps.length > 0)
          levels++;
        state.texStorage2D(34067, levels, glInternalFormat, cubeImage[0].width, cubeImage[0].height);
      }
      for (let i = 0; i < 6; i++) {
        if (isDataTexture) {
          if (useTexStorage) {
            state.texSubImage2D(34069 + i, 0, 0, 0, cubeImage[i].width, cubeImage[i].height, glFormat, glType, cubeImage[i].data);
          } else {
            state.texImage2D(34069 + i, 0, glInternalFormat, cubeImage[i].width, cubeImage[i].height, 0, glFormat, glType, cubeImage[i].data);
          }
          for (let j = 0; j < mipmaps.length; j++) {
            const mipmap = mipmaps[j];
            const mipmapImage = mipmap.image[i].image;
            if (useTexStorage) {
              state.texSubImage2D(34069 + i, j + 1, 0, 0, mipmapImage.width, mipmapImage.height, glFormat, glType, mipmapImage.data);
            } else {
              state.texImage2D(34069 + i, j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data);
            }
          }
        } else {
          if (useTexStorage) {
            state.texSubImage2D(34069 + i, 0, 0, 0, glFormat, glType, cubeImage[i]);
          } else {
            state.texImage2D(34069 + i, 0, glInternalFormat, glFormat, glType, cubeImage[i]);
          }
          for (let j = 0; j < mipmaps.length; j++) {
            const mipmap = mipmaps[j];
            if (useTexStorage) {
              state.texSubImage2D(34069 + i, j + 1, 0, 0, glFormat, glType, mipmap.image[i]);
            } else {
              state.texImage2D(34069 + i, j + 1, glInternalFormat, glFormat, glType, mipmap.image[i]);
            }
          }
        }
      }
    }
    if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
      generateMipmap(34067);
    }
    textureProperties.__version = texture.version;
    if (texture.onUpdate)
      texture.onUpdate(texture);
  }
  function setupFrameBufferTexture(framebuffer, renderTarget, texture, attachment, textureTarget) {
    const glFormat = utils.convert(texture.format, texture.encoding);
    const glType = utils.convert(texture.type);
    const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
    const renderTargetProperties = properties.get(renderTarget);
    if (!renderTargetProperties.__hasExternalTextures) {
      if (textureTarget === 32879 || textureTarget === 35866) {
        state.texImage3D(textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, renderTarget.depth, 0, glFormat, glType, null);
      } else {
        state.texImage2D(textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null);
      }
    }
    state.bindFramebuffer(36160, framebuffer);
    if (renderTarget.useRenderToTexture) {
      MultisampledRenderToTextureExtension.framebufferTexture2DMultisampleEXT(36160, attachment, textureTarget, properties.get(texture).__webglTexture, 0, getRenderTargetSamples(renderTarget));
    } else {
      _gl.framebufferTexture2D(36160, attachment, textureTarget, properties.get(texture).__webglTexture, 0);
    }
    state.bindFramebuffer(36160, null);
  }
  function setupRenderBufferStorage(renderbuffer, renderTarget, isMultisample) {
    _gl.bindRenderbuffer(36161, renderbuffer);
    if (renderTarget.depthBuffer && !renderTarget.stencilBuffer) {
      let glInternalFormat = 33189;
      if (isMultisample || renderTarget.useRenderToTexture) {
        const depthTexture = renderTarget.depthTexture;
        if (depthTexture && depthTexture.isDepthTexture) {
          if (depthTexture.type === FloatType) {
            glInternalFormat = 36012;
          } else if (depthTexture.type === UnsignedIntType) {
            glInternalFormat = 33190;
          }
        }
        const samples = getRenderTargetSamples(renderTarget);
        if (renderTarget.useRenderToTexture) {
          MultisampledRenderToTextureExtension.renderbufferStorageMultisampleEXT(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
        } else {
          _gl.renderbufferStorageMultisample(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
        }
      } else {
        _gl.renderbufferStorage(36161, glInternalFormat, renderTarget.width, renderTarget.height);
      }
      _gl.framebufferRenderbuffer(36160, 36096, 36161, renderbuffer);
    } else if (renderTarget.depthBuffer && renderTarget.stencilBuffer) {
      const samples = getRenderTargetSamples(renderTarget);
      if (isMultisample && renderTarget.useRenderbuffer) {
        _gl.renderbufferStorageMultisample(36161, samples, 35056, renderTarget.width, renderTarget.height);
      } else if (renderTarget.useRenderToTexture) {
        MultisampledRenderToTextureExtension.renderbufferStorageMultisampleEXT(36161, samples, 35056, renderTarget.width, renderTarget.height);
      } else {
        _gl.renderbufferStorage(36161, 34041, renderTarget.width, renderTarget.height);
      }
      _gl.framebufferRenderbuffer(36160, 33306, 36161, renderbuffer);
    } else {
      const texture = renderTarget.isWebGLMultipleRenderTargets === true ? renderTarget.texture[0] : renderTarget.texture;
      const glFormat = utils.convert(texture.format, texture.encoding);
      const glType = utils.convert(texture.type);
      const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
      const samples = getRenderTargetSamples(renderTarget);
      if (isMultisample && renderTarget.useRenderbuffer) {
        _gl.renderbufferStorageMultisample(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
      } else if (renderTarget.useRenderToTexture) {
        MultisampledRenderToTextureExtension.renderbufferStorageMultisampleEXT(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
      } else {
        _gl.renderbufferStorage(36161, glInternalFormat, renderTarget.width, renderTarget.height);
      }
    }
    _gl.bindRenderbuffer(36161, null);
  }
  function setupDepthTexture(framebuffer, renderTarget) {
    const isCube = renderTarget && renderTarget.isWebGLCubeRenderTarget;
    if (isCube)
      throw new Error("Depth Texture with cube render targets is not supported");
    state.bindFramebuffer(36160, framebuffer);
    if (!(renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture)) {
      throw new Error("renderTarget.depthTexture must be an instance of THREE.DepthTexture");
    }
    if (!properties.get(renderTarget.depthTexture).__webglTexture || renderTarget.depthTexture.image.width !== renderTarget.width || renderTarget.depthTexture.image.height !== renderTarget.height) {
      renderTarget.depthTexture.image.width = renderTarget.width;
      renderTarget.depthTexture.image.height = renderTarget.height;
      renderTarget.depthTexture.needsUpdate = true;
    }
    setTexture2D(renderTarget.depthTexture, 0);
    const webglDepthTexture = properties.get(renderTarget.depthTexture).__webglTexture;
    const samples = getRenderTargetSamples(renderTarget);
    if (renderTarget.depthTexture.format === DepthFormat) {
      if (renderTarget.useRenderToTexture) {
        MultisampledRenderToTextureExtension.framebufferTexture2DMultisampleEXT(36160, 36096, 3553, webglDepthTexture, 0, samples);
      } else {
        _gl.framebufferTexture2D(36160, 36096, 3553, webglDepthTexture, 0);
      }
    } else if (renderTarget.depthTexture.format === DepthStencilFormat) {
      if (renderTarget.useRenderToTexture) {
        MultisampledRenderToTextureExtension.framebufferTexture2DMultisampleEXT(36160, 33306, 3553, webglDepthTexture, 0, samples);
      } else {
        _gl.framebufferTexture2D(36160, 33306, 3553, webglDepthTexture, 0);
      }
    } else {
      throw new Error("Unknown depthTexture format");
    }
  }
  function setupDepthRenderbuffer(renderTarget) {
    const renderTargetProperties = properties.get(renderTarget);
    const isCube = renderTarget.isWebGLCubeRenderTarget === true;
    if (renderTarget.depthTexture && !renderTargetProperties.__autoAllocateDepthBuffer) {
      if (isCube)
        throw new Error("target.depthTexture not supported in Cube render targets");
      setupDepthTexture(renderTargetProperties.__webglFramebuffer, renderTarget);
    } else {
      if (isCube) {
        renderTargetProperties.__webglDepthbuffer = [];
        for (let i = 0; i < 6; i++) {
          state.bindFramebuffer(36160, renderTargetProperties.__webglFramebuffer[i]);
          renderTargetProperties.__webglDepthbuffer[i] = _gl.createRenderbuffer();
          setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer[i], renderTarget, false);
        }
      } else {
        state.bindFramebuffer(36160, renderTargetProperties.__webglFramebuffer);
        renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
        setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer, renderTarget, false);
      }
    }
    state.bindFramebuffer(36160, null);
  }
  function rebindTextures(renderTarget, colorTexture, depthTexture) {
    const renderTargetProperties = properties.get(renderTarget);
    if (colorTexture !== void 0) {
      setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, renderTarget.texture, 36064, 3553);
    }
    if (depthTexture !== void 0) {
      setupDepthRenderbuffer(renderTarget);
    }
  }
  function setupRenderTarget(renderTarget) {
    const texture = renderTarget.texture;
    const renderTargetProperties = properties.get(renderTarget);
    const textureProperties = properties.get(texture);
    renderTarget.addEventListener("dispose", onRenderTargetDispose);
    if (renderTarget.isWebGLMultipleRenderTargets !== true) {
      if (textureProperties.__webglTexture === void 0) {
        textureProperties.__webglTexture = _gl.createTexture();
      }
      textureProperties.__version = texture.version;
      info.memory.textures++;
    }
    const isCube = renderTarget.isWebGLCubeRenderTarget === true;
    const isMultipleRenderTargets = renderTarget.isWebGLMultipleRenderTargets === true;
    const isRenderTarget3D = texture.isDataTexture3D || texture.isDataTexture2DArray;
    const supportsMips = isPowerOfTwo$1(renderTarget) || isWebGL2;
    if (isCube) {
      renderTargetProperties.__webglFramebuffer = [];
      for (let i = 0; i < 6; i++) {
        renderTargetProperties.__webglFramebuffer[i] = _gl.createFramebuffer();
      }
    } else {
      renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();
      if (isMultipleRenderTargets) {
        if (capabilities.drawBuffers) {
          const textures = renderTarget.texture;
          for (let i = 0, il = textures.length; i < il; i++) {
            const attachmentProperties = properties.get(textures[i]);
            if (attachmentProperties.__webglTexture === void 0) {
              attachmentProperties.__webglTexture = _gl.createTexture();
              info.memory.textures++;
            }
          }
        } else {
          console.warn("THREE.WebGLRenderer: WebGLMultipleRenderTargets can only be used with WebGL2 or WEBGL_draw_buffers extension.");
        }
      } else if (renderTarget.useRenderbuffer) {
        if (isWebGL2) {
          renderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();
          renderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();
          _gl.bindRenderbuffer(36161, renderTargetProperties.__webglColorRenderbuffer);
          const glFormat = utils.convert(texture.format, texture.encoding);
          const glType = utils.convert(texture.type);
          const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
          const samples = getRenderTargetSamples(renderTarget);
          _gl.renderbufferStorageMultisample(36161, samples, glInternalFormat, renderTarget.width, renderTarget.height);
          state.bindFramebuffer(36160, renderTargetProperties.__webglMultisampledFramebuffer);
          _gl.framebufferRenderbuffer(36160, 36064, 36161, renderTargetProperties.__webglColorRenderbuffer);
          _gl.bindRenderbuffer(36161, null);
          if (renderTarget.depthBuffer) {
            renderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();
            setupRenderBufferStorage(renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true);
          }
          state.bindFramebuffer(36160, null);
        } else {
          console.warn("THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.");
        }
      }
    }
    if (isCube) {
      state.bindTexture(34067, textureProperties.__webglTexture);
      setTextureParameters(34067, texture, supportsMips);
      for (let i = 0; i < 6; i++) {
        setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[i], renderTarget, texture, 36064, 34069 + i);
      }
      if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
        generateMipmap(34067);
      }
      state.unbindTexture();
    } else if (isMultipleRenderTargets) {
      const textures = renderTarget.texture;
      for (let i = 0, il = textures.length; i < il; i++) {
        const attachment = textures[i];
        const attachmentProperties = properties.get(attachment);
        state.bindTexture(3553, attachmentProperties.__webglTexture);
        setTextureParameters(3553, attachment, supportsMips);
        setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, attachment, 36064 + i, 3553);
        if (textureNeedsGenerateMipmaps(attachment, supportsMips)) {
          generateMipmap(3553);
        }
      }
      state.unbindTexture();
    } else {
      let glTextureType = 3553;
      if (isRenderTarget3D) {
        if (isWebGL2) {
          const isTexture3D = texture.isDataTexture3D;
          glTextureType = isTexture3D ? 32879 : 35866;
        } else {
          console.warn("THREE.DataTexture3D and THREE.DataTexture2DArray only supported with WebGL2.");
        }
      }
      state.bindTexture(glTextureType, textureProperties.__webglTexture);
      setTextureParameters(glTextureType, texture, supportsMips);
      setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, texture, 36064, glTextureType);
      if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
        generateMipmap(glTextureType);
      }
      state.unbindTexture();
    }
    if (renderTarget.depthBuffer) {
      setupDepthRenderbuffer(renderTarget);
    }
  }
  function updateRenderTargetMipmap(renderTarget) {
    const supportsMips = isPowerOfTwo$1(renderTarget) || isWebGL2;
    const textures = renderTarget.isWebGLMultipleRenderTargets === true ? renderTarget.texture : [renderTarget.texture];
    for (let i = 0, il = textures.length; i < il; i++) {
      const texture = textures[i];
      if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
        const target = renderTarget.isWebGLCubeRenderTarget ? 34067 : 3553;
        const webglTexture = properties.get(texture).__webglTexture;
        state.bindTexture(target, webglTexture);
        generateMipmap(target);
        state.unbindTexture();
      }
    }
  }
  function updateMultisampleRenderTarget(renderTarget) {
    if (renderTarget.useRenderbuffer) {
      if (isWebGL2) {
        const width = renderTarget.width;
        const height = renderTarget.height;
        let mask = 16384;
        const invalidationArray = [36064];
        const depthStyle = renderTarget.stencilBuffer ? 33306 : 36096;
        if (renderTarget.depthBuffer) {
          invalidationArray.push(depthStyle);
        }
        if (!renderTarget.ignoreDepthForMultisampleCopy) {
          if (renderTarget.depthBuffer)
            mask |= 256;
          if (renderTarget.stencilBuffer)
            mask |= 1024;
        }
        const renderTargetProperties = properties.get(renderTarget);
        state.bindFramebuffer(36008, renderTargetProperties.__webglMultisampledFramebuffer);
        state.bindFramebuffer(36009, renderTargetProperties.__webglFramebuffer);
        if (renderTarget.ignoreDepthForMultisampleCopy) {
          _gl.invalidateFramebuffer(36008, [depthStyle]);
          _gl.invalidateFramebuffer(36009, [depthStyle]);
        }
        _gl.blitFramebuffer(0, 0, width, height, 0, 0, width, height, mask, 9728);
        _gl.invalidateFramebuffer(36008, invalidationArray);
        state.bindFramebuffer(36008, null);
        state.bindFramebuffer(36009, renderTargetProperties.__webglMultisampledFramebuffer);
      } else {
        console.warn("THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.");
      }
    }
  }
  function getRenderTargetSamples(renderTarget) {
    return isWebGL2 && (renderTarget.useRenderbuffer || renderTarget.useRenderToTexture) ? Math.min(maxSamples, renderTarget.samples) : 0;
  }
  function updateVideoTexture(texture) {
    const frame = info.render.frame;
    if (_videoTextures.get(texture) !== frame) {
      _videoTextures.set(texture, frame);
      texture.update();
    }
  }
  function verifyColorSpace(texture, image) {
    const encoding = texture.encoding;
    const format = texture.format;
    const type = texture.type;
    if (texture.isCompressedTexture === true || texture.isVideoTexture === true || texture.format === _SRGBAFormat)
      return image;
    if (encoding !== LinearEncoding) {
      if (encoding === sRGBEncoding) {
        if (isWebGL2 === false) {
          if (extensions.has("EXT_sRGB") === true && format === RGBAFormat) {
            texture.format = _SRGBAFormat;
            texture.minFilter = LinearFilter;
            texture.generateMipmaps = false;
          } else {
            image = ImageUtils.sRGBToLinear(image);
          }
        } else {
          if (format !== RGBAFormat || type !== UnsignedByteType) {
            console.warn("THREE.WebGLTextures: sRGB encoded textures have to use RGBAFormat and UnsignedByteType.");
          }
        }
      } else {
        console.error("THREE.WebGLTextures: Unsupported texture encoding:", encoding);
      }
    }
    return image;
  }
  let warnedTexture2D = false;
  let warnedTextureCube = false;
  function safeSetTexture2D(texture, slot) {
    if (texture && texture.isWebGLRenderTarget) {
      if (warnedTexture2D === false) {
        console.warn("THREE.WebGLTextures.safeSetTexture2D: don't use render targets as textures. Use their .texture property instead.");
        warnedTexture2D = true;
      }
      texture = texture.texture;
    }
    setTexture2D(texture, slot);
  }
  function safeSetTextureCube(texture, slot) {
    if (texture && texture.isWebGLCubeRenderTarget) {
      if (warnedTextureCube === false) {
        console.warn("THREE.WebGLTextures.safeSetTextureCube: don't use cube render targets as textures. Use their .texture property instead.");
        warnedTextureCube = true;
      }
      texture = texture.texture;
    }
    setTextureCube(texture, slot);
  }
  this.allocateTextureUnit = allocateTextureUnit;
  this.resetTextureUnits = resetTextureUnits;
  this.setTexture2D = setTexture2D;
  this.setTexture2DArray = setTexture2DArray;
  this.setTexture3D = setTexture3D;
  this.setTextureCube = setTextureCube;
  this.rebindTextures = rebindTextures;
  this.setupRenderTarget = setupRenderTarget;
  this.updateRenderTargetMipmap = updateRenderTargetMipmap;
  this.updateMultisampleRenderTarget = updateMultisampleRenderTarget;
  this.setupDepthRenderbuffer = setupDepthRenderbuffer;
  this.setupFrameBufferTexture = setupFrameBufferTexture;
  this.safeSetTexture2D = safeSetTexture2D;
  this.safeSetTextureCube = safeSetTextureCube;
}
function WebGLUtils(gl, extensions, capabilities) {
  const isWebGL2 = capabilities.isWebGL2;
  function convert(p, encoding = null) {
    let extension;
    if (p === UnsignedByteType)
      return 5121;
    if (p === UnsignedShort4444Type)
      return 32819;
    if (p === UnsignedShort5551Type)
      return 32820;
    if (p === ByteType)
      return 5120;
    if (p === ShortType)
      return 5122;
    if (p === UnsignedShortType)
      return 5123;
    if (p === IntType)
      return 5124;
    if (p === UnsignedIntType)
      return 5125;
    if (p === FloatType)
      return 5126;
    if (p === HalfFloatType) {
      if (isWebGL2)
        return 5131;
      extension = extensions.get("OES_texture_half_float");
      if (extension !== null) {
        return extension.HALF_FLOAT_OES;
      } else {
        return null;
      }
    }
    if (p === AlphaFormat)
      return 6406;
    if (p === RGBAFormat)
      return 6408;
    if (p === LuminanceFormat)
      return 6409;
    if (p === LuminanceAlphaFormat)
      return 6410;
    if (p === DepthFormat)
      return 6402;
    if (p === DepthStencilFormat)
      return 34041;
    if (p === RedFormat)
      return 6403;
    if (p === _SRGBAFormat) {
      extension = extensions.get("EXT_sRGB");
      if (extension !== null) {
        return extension.SRGB_ALPHA_EXT;
      } else {
        return null;
      }
    }
    if (p === RedIntegerFormat)
      return 36244;
    if (p === RGFormat)
      return 33319;
    if (p === RGIntegerFormat)
      return 33320;
    if (p === RGBAIntegerFormat)
      return 36249;
    if (p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format) {
      if (encoding === sRGBEncoding) {
        extension = extensions.get("WEBGL_compressed_texture_s3tc_srgb");
        if (extension !== null) {
          if (p === RGB_S3TC_DXT1_Format)
            return extension.COMPRESSED_SRGB_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT1_Format)
            return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT3_Format)
            return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
          if (p === RGBA_S3TC_DXT5_Format)
            return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
        } else {
          return null;
        }
      } else {
        extension = extensions.get("WEBGL_compressed_texture_s3tc");
        if (extension !== null) {
          if (p === RGB_S3TC_DXT1_Format)
            return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT1_Format)
            return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT3_Format)
            return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
          if (p === RGBA_S3TC_DXT5_Format)
            return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
        } else {
          return null;
        }
      }
    }
    if (p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format) {
      extension = extensions.get("WEBGL_compressed_texture_pvrtc");
      if (extension !== null) {
        if (p === RGB_PVRTC_4BPPV1_Format)
          return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
        if (p === RGB_PVRTC_2BPPV1_Format)
          return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
        if (p === RGBA_PVRTC_4BPPV1_Format)
          return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
        if (p === RGBA_PVRTC_2BPPV1_Format)
          return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
      } else {
        return null;
      }
    }
    if (p === RGB_ETC1_Format) {
      extension = extensions.get("WEBGL_compressed_texture_etc1");
      if (extension !== null) {
        return extension.COMPRESSED_RGB_ETC1_WEBGL;
      } else {
        return null;
      }
    }
    if (p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format) {
      extension = extensions.get("WEBGL_compressed_texture_etc");
      if (extension !== null) {
        if (p === RGB_ETC2_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2;
        if (p === RGBA_ETC2_EAC_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC;
      } else {
        return null;
      }
    }
    if (p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format || p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format || p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format || p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format || p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format) {
      extension = extensions.get("WEBGL_compressed_texture_astc");
      if (extension !== null) {
        if (p === RGBA_ASTC_4x4_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR;
        if (p === RGBA_ASTC_5x4_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR;
        if (p === RGBA_ASTC_5x5_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR;
        if (p === RGBA_ASTC_6x5_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR;
        if (p === RGBA_ASTC_6x6_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR;
        if (p === RGBA_ASTC_8x5_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR;
        if (p === RGBA_ASTC_8x6_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR;
        if (p === RGBA_ASTC_8x8_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR;
        if (p === RGBA_ASTC_10x5_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR;
        if (p === RGBA_ASTC_10x6_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR;
        if (p === RGBA_ASTC_10x8_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR;
        if (p === RGBA_ASTC_10x10_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR;
        if (p === RGBA_ASTC_12x10_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR;
        if (p === RGBA_ASTC_12x12_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR : extension.COMPRESSED_RGBA_ASTC_12x12_KHR;
      } else {
        return null;
      }
    }
    if (p === RGBA_BPTC_Format) {
      extension = extensions.get("EXT_texture_compression_bptc");
      if (extension !== null) {
        if (p === RGBA_BPTC_Format)
          return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT;
      } else {
        return null;
      }
    }
    if (p === UnsignedInt248Type) {
      if (isWebGL2)
        return 34042;
      extension = extensions.get("WEBGL_depth_texture");
      if (extension !== null) {
        return extension.UNSIGNED_INT_24_8_WEBGL;
      } else {
        return null;
      }
    }
  }
  return {convert};
}
class ArrayCamera extends PerspectiveCamera {
  constructor(array = []) {
    super();
    this.cameras = array;
  }
}
ArrayCamera.prototype.isArrayCamera = true;
class Group extends Object3D {
  constructor() {
    super();
    this.type = "Group";
  }
}
Group.prototype.isGroup = true;
const _moveEvent = {type: "move"};
class WebXRController {
  constructor() {
    this._targetRay = null;
    this._grip = null;
    this._hand = null;
  }
  getHandSpace() {
    if (this._hand === null) {
      this._hand = new Group();
      this._hand.matrixAutoUpdate = false;
      this._hand.visible = false;
      this._hand.joints = {};
      this._hand.inputState = {pinching: false};
    }
    return this._hand;
  }
  getTargetRaySpace() {
    if (this._targetRay === null) {
      this._targetRay = new Group();
      this._targetRay.matrixAutoUpdate = false;
      this._targetRay.visible = false;
      this._targetRay.hasLinearVelocity = false;
      this._targetRay.linearVelocity = new Vector3$1();
      this._targetRay.hasAngularVelocity = false;
      this._targetRay.angularVelocity = new Vector3$1();
    }
    return this._targetRay;
  }
  getGripSpace() {
    if (this._grip === null) {
      this._grip = new Group();
      this._grip.matrixAutoUpdate = false;
      this._grip.visible = false;
      this._grip.hasLinearVelocity = false;
      this._grip.linearVelocity = new Vector3$1();
      this._grip.hasAngularVelocity = false;
      this._grip.angularVelocity = new Vector3$1();
    }
    return this._grip;
  }
  dispatchEvent(event) {
    if (this._targetRay !== null) {
      this._targetRay.dispatchEvent(event);
    }
    if (this._grip !== null) {
      this._grip.dispatchEvent(event);
    }
    if (this._hand !== null) {
      this._hand.dispatchEvent(event);
    }
    return this;
  }
  disconnect(inputSource) {
    this.dispatchEvent({type: "disconnected", data: inputSource});
    if (this._targetRay !== null) {
      this._targetRay.visible = false;
    }
    if (this._grip !== null) {
      this._grip.visible = false;
    }
    if (this._hand !== null) {
      this._hand.visible = false;
    }
    return this;
  }
  update(inputSource, frame, referenceSpace) {
    let inputPose = null;
    let gripPose = null;
    let handPose = null;
    const targetRay = this._targetRay;
    const grip = this._grip;
    const hand = this._hand;
    if (inputSource && frame.session.visibilityState !== "visible-blurred") {
      if (targetRay !== null) {
        inputPose = frame.getPose(inputSource.targetRaySpace, referenceSpace);
        if (inputPose !== null) {
          targetRay.matrix.fromArray(inputPose.transform.matrix);
          targetRay.matrix.decompose(targetRay.position, targetRay.rotation, targetRay.scale);
          if (inputPose.linearVelocity) {
            targetRay.hasLinearVelocity = true;
            targetRay.linearVelocity.copy(inputPose.linearVelocity);
          } else {
            targetRay.hasLinearVelocity = false;
          }
          if (inputPose.angularVelocity) {
            targetRay.hasAngularVelocity = true;
            targetRay.angularVelocity.copy(inputPose.angularVelocity);
          } else {
            targetRay.hasAngularVelocity = false;
          }
          this.dispatchEvent(_moveEvent);
        }
      }
      if (hand && inputSource.hand) {
        handPose = true;
        for (const inputjoint of inputSource.hand.values()) {
          const jointPose = frame.getJointPose(inputjoint, referenceSpace);
          if (hand.joints[inputjoint.jointName] === void 0) {
            const joint2 = new Group();
            joint2.matrixAutoUpdate = false;
            joint2.visible = false;
            hand.joints[inputjoint.jointName] = joint2;
            hand.add(joint2);
          }
          const joint = hand.joints[inputjoint.jointName];
          if (jointPose !== null) {
            joint.matrix.fromArray(jointPose.transform.matrix);
            joint.matrix.decompose(joint.position, joint.rotation, joint.scale);
            joint.jointRadius = jointPose.radius;
          }
          joint.visible = jointPose !== null;
        }
        const indexTip = hand.joints["index-finger-tip"];
        const thumbTip = hand.joints["thumb-tip"];
        const distance = indexTip.position.distanceTo(thumbTip.position);
        const distanceToPinch = 0.02;
        const threshold = 5e-3;
        if (hand.inputState.pinching && distance > distanceToPinch + threshold) {
          hand.inputState.pinching = false;
          this.dispatchEvent({
            type: "pinchend",
            handedness: inputSource.handedness,
            target: this
          });
        } else if (!hand.inputState.pinching && distance <= distanceToPinch - threshold) {
          hand.inputState.pinching = true;
          this.dispatchEvent({
            type: "pinchstart",
            handedness: inputSource.handedness,
            target: this
          });
        }
      } else {
        if (grip !== null && inputSource.gripSpace) {
          gripPose = frame.getPose(inputSource.gripSpace, referenceSpace);
          if (gripPose !== null) {
            grip.matrix.fromArray(gripPose.transform.matrix);
            grip.matrix.decompose(grip.position, grip.rotation, grip.scale);
            if (gripPose.linearVelocity) {
              grip.hasLinearVelocity = true;
              grip.linearVelocity.copy(gripPose.linearVelocity);
            } else {
              grip.hasLinearVelocity = false;
            }
            if (gripPose.angularVelocity) {
              grip.hasAngularVelocity = true;
              grip.angularVelocity.copy(gripPose.angularVelocity);
            } else {
              grip.hasAngularVelocity = false;
            }
          }
        }
      }
    }
    if (targetRay !== null) {
      targetRay.visible = inputPose !== null;
    }
    if (grip !== null) {
      grip.visible = gripPose !== null;
    }
    if (hand !== null) {
      hand.visible = handPose !== null;
    }
    return this;
  }
}
class DepthTexture extends Texture {
  constructor(width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format) {
    format = format !== void 0 ? format : DepthFormat;
    if (format !== DepthFormat && format !== DepthStencilFormat) {
      throw new Error("DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat");
    }
    if (type === void 0 && format === DepthFormat)
      type = UnsignedShortType;
    if (type === void 0 && format === DepthStencilFormat)
      type = UnsignedInt248Type;
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
    this.image = {width, height};
    this.magFilter = magFilter !== void 0 ? magFilter : NearestFilter;
    this.minFilter = minFilter !== void 0 ? minFilter : NearestFilter;
    this.flipY = false;
    this.generateMipmaps = false;
  }
}
DepthTexture.prototype.isDepthTexture = true;
class WebXRManager extends EventDispatcher {
  constructor(renderer, gl) {
    super();
    const scope = this;
    let session = null;
    let framebufferScaleFactor = 1;
    let referenceSpace = null;
    let referenceSpaceType = "local-floor";
    const hasMultisampledRenderToTexture = renderer.extensions.has("WEBGL_multisampled_render_to_texture");
    let pose = null;
    let glBinding = null;
    let glProjLayer = null;
    let glBaseLayer = null;
    let isMultisample = false;
    let xrFrame = null;
    const attributes = gl.getContextAttributes();
    let initialRenderTarget = null;
    let newRenderTarget = null;
    const controllers = [];
    const inputSourcesMap = new Map();
    const cameraL = new PerspectiveCamera();
    cameraL.layers.enable(1);
    cameraL.viewport = new Vector4$1();
    const cameraR = new PerspectiveCamera();
    cameraR.layers.enable(2);
    cameraR.viewport = new Vector4$1();
    const cameras = [cameraL, cameraR];
    const cameraVR = new ArrayCamera();
    cameraVR.layers.enable(1);
    cameraVR.layers.enable(2);
    let _currentDepthNear = null;
    let _currentDepthFar = null;
    this.cameraAutoUpdate = true;
    this.enabled = false;
    this.isPresenting = false;
    this.getController = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getTargetRaySpace();
    };
    this.getControllerGrip = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getGripSpace();
    };
    this.getHand = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getHandSpace();
    };
    function onSessionEvent(event) {
      const controller = inputSourcesMap.get(event.inputSource);
      if (controller) {
        controller.dispatchEvent({type: event.type, data: event.inputSource});
      }
    }
    function onSessionEnd() {
      inputSourcesMap.forEach(function(controller, inputSource) {
        controller.disconnect(inputSource);
      });
      inputSourcesMap.clear();
      _currentDepthNear = null;
      _currentDepthFar = null;
      renderer.setRenderTarget(initialRenderTarget);
      glBaseLayer = null;
      glProjLayer = null;
      glBinding = null;
      session = null;
      newRenderTarget = null;
      animation.stop();
      scope.isPresenting = false;
      scope.dispatchEvent({type: "sessionend"});
    }
    this.setFramebufferScaleFactor = function(value) {
      framebufferScaleFactor = value;
      if (scope.isPresenting === true) {
        console.warn("THREE.WebXRManager: Cannot change framebuffer scale while presenting.");
      }
    };
    this.setReferenceSpaceType = function(value) {
      referenceSpaceType = value;
      if (scope.isPresenting === true) {
        console.warn("THREE.WebXRManager: Cannot change reference space type while presenting.");
      }
    };
    this.getReferenceSpace = function() {
      return referenceSpace;
    };
    this.getBaseLayer = function() {
      return glProjLayer !== null ? glProjLayer : glBaseLayer;
    };
    this.getBinding = function() {
      return glBinding;
    };
    this.getFrame = function() {
      return xrFrame;
    };
    this.getSession = function() {
      return session;
    };
    this.setSession = async function(value) {
      session = value;
      if (session !== null) {
        initialRenderTarget = renderer.getRenderTarget();
        session.addEventListener("select", onSessionEvent);
        session.addEventListener("selectstart", onSessionEvent);
        session.addEventListener("selectend", onSessionEvent);
        session.addEventListener("squeeze", onSessionEvent);
        session.addEventListener("squeezestart", onSessionEvent);
        session.addEventListener("squeezeend", onSessionEvent);
        session.addEventListener("end", onSessionEnd);
        session.addEventListener("inputsourceschange", onInputSourcesChange);
        if (attributes.xrCompatible !== true) {
          await gl.makeXRCompatible();
        }
        if (session.renderState.layers === void 0 || renderer.capabilities.isWebGL2 === false) {
          const layerInit = {
            antialias: session.renderState.layers === void 0 ? attributes.antialias : true,
            alpha: attributes.alpha,
            depth: attributes.depth,
            stencil: attributes.stencil,
            framebufferScaleFactor
          };
          glBaseLayer = new XRWebGLLayer(session, gl, layerInit);
          session.updateRenderState({baseLayer: glBaseLayer});
          newRenderTarget = new WebGLRenderTarget(glBaseLayer.framebufferWidth, glBaseLayer.framebufferHeight, {
            format: RGBAFormat,
            type: UnsignedByteType,
            encoding: renderer.outputEncoding
          });
        } else {
          isMultisample = attributes.antialias;
          let depthFormat = null;
          let depthType = null;
          let glDepthFormat = null;
          if (attributes.depth) {
            glDepthFormat = attributes.stencil ? 35056 : 33190;
            depthFormat = attributes.stencil ? DepthStencilFormat : DepthFormat;
            depthType = attributes.stencil ? UnsignedInt248Type : UnsignedShortType;
          }
          const projectionlayerInit = {
            colorFormat: renderer.outputEncoding === sRGBEncoding ? 35907 : 32856,
            depthFormat: glDepthFormat,
            scaleFactor: framebufferScaleFactor
          };
          glBinding = new XRWebGLBinding(session, gl);
          glProjLayer = glBinding.createProjectionLayer(projectionlayerInit);
          session.updateRenderState({layers: [glProjLayer]});
          if (isMultisample) {
            newRenderTarget = new WebGLMultisampleRenderTarget(glProjLayer.textureWidth, glProjLayer.textureHeight, {
              format: RGBAFormat,
              type: UnsignedByteType,
              depthTexture: new DepthTexture(glProjLayer.textureWidth, glProjLayer.textureHeight, depthType, void 0, void 0, void 0, void 0, void 0, void 0, depthFormat),
              stencilBuffer: attributes.stencil,
              ignoreDepth: glProjLayer.ignoreDepthValues,
              useRenderToTexture: hasMultisampledRenderToTexture,
              encoding: renderer.outputEncoding
            });
          } else {
            newRenderTarget = new WebGLRenderTarget(glProjLayer.textureWidth, glProjLayer.textureHeight, {
              format: RGBAFormat,
              type: UnsignedByteType,
              depthTexture: new DepthTexture(glProjLayer.textureWidth, glProjLayer.textureHeight, depthType, void 0, void 0, void 0, void 0, void 0, void 0, depthFormat),
              stencilBuffer: attributes.stencil,
              ignoreDepth: glProjLayer.ignoreDepthValues,
              encoding: renderer.outputEncoding
            });
          }
        }
        newRenderTarget.isXRRenderTarget = true;
        this.setFoveation(1);
        referenceSpace = await session.requestReferenceSpace(referenceSpaceType);
        animation.setContext(session);
        animation.start();
        scope.isPresenting = true;
        scope.dispatchEvent({type: "sessionstart"});
      }
    };
    function onInputSourcesChange(event) {
      const inputSources = session.inputSources;
      for (let i = 0; i < controllers.length; i++) {
        inputSourcesMap.set(inputSources[i], controllers[i]);
      }
      for (let i = 0; i < event.removed.length; i++) {
        const inputSource = event.removed[i];
        const controller = inputSourcesMap.get(inputSource);
        if (controller) {
          controller.dispatchEvent({type: "disconnected", data: inputSource});
          inputSourcesMap.delete(inputSource);
        }
      }
      for (let i = 0; i < event.added.length; i++) {
        const inputSource = event.added[i];
        const controller = inputSourcesMap.get(inputSource);
        if (controller) {
          controller.dispatchEvent({type: "connected", data: inputSource});
        }
      }
    }
    const cameraLPos = new Vector3$1();
    const cameraRPos = new Vector3$1();
    function setProjectionFromUnion(camera, cameraL2, cameraR2) {
      cameraLPos.setFromMatrixPosition(cameraL2.matrixWorld);
      cameraRPos.setFromMatrixPosition(cameraR2.matrixWorld);
      const ipd = cameraLPos.distanceTo(cameraRPos);
      const projL = cameraL2.projectionMatrix.elements;
      const projR = cameraR2.projectionMatrix.elements;
      const near = projL[14] / (projL[10] - 1);
      const far = projL[14] / (projL[10] + 1);
      const topFov = (projL[9] + 1) / projL[5];
      const bottomFov = (projL[9] - 1) / projL[5];
      const leftFov = (projL[8] - 1) / projL[0];
      const rightFov = (projR[8] + 1) / projR[0];
      const left = near * leftFov;
      const right = near * rightFov;
      const zOffset = ipd / (-leftFov + rightFov);
      const xOffset = zOffset * -leftFov;
      cameraL2.matrixWorld.decompose(camera.position, camera.quaternion, camera.scale);
      camera.translateX(xOffset);
      camera.translateZ(zOffset);
      camera.matrixWorld.compose(camera.position, camera.quaternion, camera.scale);
      camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
      const near2 = near + zOffset;
      const far2 = far + zOffset;
      const left2 = left - xOffset;
      const right2 = right + (ipd - xOffset);
      const top2 = topFov * far / far2 * near2;
      const bottom2 = bottomFov * far / far2 * near2;
      camera.projectionMatrix.makePerspective(left2, right2, top2, bottom2, near2, far2);
    }
    function updateCamera(camera, parent) {
      if (parent === null) {
        camera.matrixWorld.copy(camera.matrix);
      } else {
        camera.matrixWorld.multiplyMatrices(parent.matrixWorld, camera.matrix);
      }
      camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
    }
    this.updateCamera = function(camera) {
      if (session === null)
        return;
      cameraVR.near = cameraR.near = cameraL.near = camera.near;
      cameraVR.far = cameraR.far = cameraL.far = camera.far;
      if (_currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far) {
        session.updateRenderState({
          depthNear: cameraVR.near,
          depthFar: cameraVR.far
        });
        _currentDepthNear = cameraVR.near;
        _currentDepthFar = cameraVR.far;
      }
      const parent = camera.parent;
      const cameras2 = cameraVR.cameras;
      updateCamera(cameraVR, parent);
      for (let i = 0; i < cameras2.length; i++) {
        updateCamera(cameras2[i], parent);
      }
      cameraVR.matrixWorld.decompose(cameraVR.position, cameraVR.quaternion, cameraVR.scale);
      camera.position.copy(cameraVR.position);
      camera.quaternion.copy(cameraVR.quaternion);
      camera.scale.copy(cameraVR.scale);
      camera.matrix.copy(cameraVR.matrix);
      camera.matrixWorld.copy(cameraVR.matrixWorld);
      const children = camera.children;
      for (let i = 0, l = children.length; i < l; i++) {
        children[i].updateMatrixWorld(true);
      }
      if (cameras2.length === 2) {
        setProjectionFromUnion(cameraVR, cameraL, cameraR);
      } else {
        cameraVR.projectionMatrix.copy(cameraL.projectionMatrix);
      }
    };
    this.getCamera = function() {
      return cameraVR;
    };
    this.getFoveation = function() {
      if (glProjLayer !== null) {
        return glProjLayer.fixedFoveation;
      }
      if (glBaseLayer !== null) {
        return glBaseLayer.fixedFoveation;
      }
      return void 0;
    };
    this.setFoveation = function(foveation) {
      if (glProjLayer !== null) {
        glProjLayer.fixedFoveation = foveation;
      }
      if (glBaseLayer !== null && glBaseLayer.fixedFoveation !== void 0) {
        glBaseLayer.fixedFoveation = foveation;
      }
    };
    let onAnimationFrameCallback = null;
    function onAnimationFrame(time, frame) {
      pose = frame.getViewerPose(referenceSpace);
      xrFrame = frame;
      if (pose !== null) {
        const views = pose.views;
        if (glBaseLayer !== null) {
          renderer.setRenderTargetFramebuffer(newRenderTarget, glBaseLayer.framebuffer);
          renderer.setRenderTarget(newRenderTarget);
        }
        let cameraVRNeedsUpdate = false;
        if (views.length !== cameraVR.cameras.length) {
          cameraVR.cameras.length = 0;
          cameraVRNeedsUpdate = true;
        }
        for (let i = 0; i < views.length; i++) {
          const view = views[i];
          let viewport = null;
          if (glBaseLayer !== null) {
            viewport = glBaseLayer.getViewport(view);
          } else {
            const glSubImage = glBinding.getViewSubImage(glProjLayer, view);
            viewport = glSubImage.viewport;
            if (i === 0) {
              renderer.setRenderTargetTextures(newRenderTarget, glSubImage.colorTexture, glProjLayer.ignoreDepthValues ? void 0 : glSubImage.depthStencilTexture);
              renderer.setRenderTarget(newRenderTarget);
            }
          }
          const camera = cameras[i];
          camera.matrix.fromArray(view.transform.matrix);
          camera.projectionMatrix.fromArray(view.projectionMatrix);
          camera.viewport.set(viewport.x, viewport.y, viewport.width, viewport.height);
          if (i === 0) {
            cameraVR.matrix.copy(camera.matrix);
          }
          if (cameraVRNeedsUpdate === true) {
            cameraVR.cameras.push(camera);
          }
        }
      }
      const inputSources = session.inputSources;
      for (let i = 0; i < controllers.length; i++) {
        const controller = controllers[i];
        const inputSource = inputSources[i];
        controller.update(inputSource, frame, referenceSpace);
      }
      if (onAnimationFrameCallback)
        onAnimationFrameCallback(time, frame);
      xrFrame = null;
    }
    const animation = new WebGLAnimation();
    animation.setAnimationLoop(onAnimationFrame);
    this.setAnimationLoop = function(callback) {
      onAnimationFrameCallback = callback;
    };
    this.dispose = function() {
    };
  }
}
function WebGLMaterials(properties) {
  function refreshFogUniforms(uniforms, fog) {
    uniforms.fogColor.value.copy(fog.color);
    if (fog.isFog) {
      uniforms.fogNear.value = fog.near;
      uniforms.fogFar.value = fog.far;
    } else if (fog.isFogExp2) {
      uniforms.fogDensity.value = fog.density;
    }
  }
  function refreshMaterialUniforms(uniforms, material, pixelRatio, height, transmissionRenderTarget) {
    if (material.isMeshBasicMaterial) {
      refreshUniformsCommon(uniforms, material);
    } else if (material.isMeshLambertMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsLambert(uniforms, material);
    } else if (material.isMeshToonMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsToon(uniforms, material);
    } else if (material.isMeshPhongMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsPhong(uniforms, material);
    } else if (material.isMeshStandardMaterial) {
      refreshUniformsCommon(uniforms, material);
      if (material.isMeshPhysicalMaterial) {
        refreshUniformsPhysical(uniforms, material, transmissionRenderTarget);
      } else {
        refreshUniformsStandard(uniforms, material);
      }
    } else if (material.isMeshMatcapMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsMatcap(uniforms, material);
    } else if (material.isMeshDepthMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsDepth(uniforms, material);
    } else if (material.isMeshDistanceMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsDistance(uniforms, material);
    } else if (material.isMeshNormalMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsNormal(uniforms, material);
    } else if (material.isLineBasicMaterial) {
      refreshUniformsLine(uniforms, material);
      if (material.isLineDashedMaterial) {
        refreshUniformsDash(uniforms, material);
      }
    } else if (material.isPointsMaterial) {
      refreshUniformsPoints(uniforms, material, pixelRatio, height);
    } else if (material.isSpriteMaterial) {
      refreshUniformsSprites(uniforms, material);
    } else if (material.isShadowMaterial) {
      uniforms.color.value.copy(material.color);
      uniforms.opacity.value = material.opacity;
    } else if (material.isShaderMaterial) {
      material.uniformsNeedUpdate = false;
    }
  }
  function refreshUniformsCommon(uniforms, material) {
    uniforms.opacity.value = material.opacity;
    if (material.color) {
      uniforms.diffuse.value.copy(material.color);
    }
    if (material.emissive) {
      uniforms.emissive.value.copy(material.emissive).multiplyScalar(material.emissiveIntensity);
    }
    if (material.map) {
      uniforms.map.value = material.map;
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
    }
    if (material.specularMap) {
      uniforms.specularMap.value = material.specularMap;
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
    const envMap = properties.get(material).envMap;
    if (envMap) {
      uniforms.envMap.value = envMap;
      uniforms.flipEnvMap.value = envMap.isCubeTexture && envMap.isRenderTargetTexture === false ? -1 : 1;
      uniforms.reflectivity.value = material.reflectivity;
      uniforms.ior.value = material.ior;
      uniforms.refractionRatio.value = material.refractionRatio;
    }
    if (material.lightMap) {
      uniforms.lightMap.value = material.lightMap;
      uniforms.lightMapIntensity.value = material.lightMapIntensity;
    }
    if (material.aoMap) {
      uniforms.aoMap.value = material.aoMap;
      uniforms.aoMapIntensity.value = material.aoMapIntensity;
    }
    let uvScaleMap;
    if (material.map) {
      uvScaleMap = material.map;
    } else if (material.specularMap) {
      uvScaleMap = material.specularMap;
    } else if (material.displacementMap) {
      uvScaleMap = material.displacementMap;
    } else if (material.normalMap) {
      uvScaleMap = material.normalMap;
    } else if (material.bumpMap) {
      uvScaleMap = material.bumpMap;
    } else if (material.roughnessMap) {
      uvScaleMap = material.roughnessMap;
    } else if (material.metalnessMap) {
      uvScaleMap = material.metalnessMap;
    } else if (material.alphaMap) {
      uvScaleMap = material.alphaMap;
    } else if (material.emissiveMap) {
      uvScaleMap = material.emissiveMap;
    } else if (material.clearcoatMap) {
      uvScaleMap = material.clearcoatMap;
    } else if (material.clearcoatNormalMap) {
      uvScaleMap = material.clearcoatNormalMap;
    } else if (material.clearcoatRoughnessMap) {
      uvScaleMap = material.clearcoatRoughnessMap;
    } else if (material.specularIntensityMap) {
      uvScaleMap = material.specularIntensityMap;
    } else if (material.specularColorMap) {
      uvScaleMap = material.specularColorMap;
    } else if (material.transmissionMap) {
      uvScaleMap = material.transmissionMap;
    } else if (material.thicknessMap) {
      uvScaleMap = material.thicknessMap;
    } else if (material.sheenColorMap) {
      uvScaleMap = material.sheenColorMap;
    } else if (material.sheenRoughnessMap) {
      uvScaleMap = material.sheenRoughnessMap;
    }
    if (uvScaleMap !== void 0) {
      if (uvScaleMap.isWebGLRenderTarget) {
        uvScaleMap = uvScaleMap.texture;
      }
      if (uvScaleMap.matrixAutoUpdate === true) {
        uvScaleMap.updateMatrix();
      }
      uniforms.uvTransform.value.copy(uvScaleMap.matrix);
    }
    let uv2ScaleMap;
    if (material.aoMap) {
      uv2ScaleMap = material.aoMap;
    } else if (material.lightMap) {
      uv2ScaleMap = material.lightMap;
    }
    if (uv2ScaleMap !== void 0) {
      if (uv2ScaleMap.isWebGLRenderTarget) {
        uv2ScaleMap = uv2ScaleMap.texture;
      }
      if (uv2ScaleMap.matrixAutoUpdate === true) {
        uv2ScaleMap.updateMatrix();
      }
      uniforms.uv2Transform.value.copy(uv2ScaleMap.matrix);
    }
  }
  function refreshUniformsLine(uniforms, material) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
  }
  function refreshUniformsDash(uniforms, material) {
    uniforms.dashSize.value = material.dashSize;
    uniforms.totalSize.value = material.dashSize + material.gapSize;
    uniforms.scale.value = material.scale;
  }
  function refreshUniformsPoints(uniforms, material, pixelRatio, height) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
    uniforms.size.value = material.size * pixelRatio;
    uniforms.scale.value = height * 0.5;
    if (material.map) {
      uniforms.map.value = material.map;
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
    let uvScaleMap;
    if (material.map) {
      uvScaleMap = material.map;
    } else if (material.alphaMap) {
      uvScaleMap = material.alphaMap;
    }
    if (uvScaleMap !== void 0) {
      if (uvScaleMap.matrixAutoUpdate === true) {
        uvScaleMap.updateMatrix();
      }
      uniforms.uvTransform.value.copy(uvScaleMap.matrix);
    }
  }
  function refreshUniformsSprites(uniforms, material) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
    uniforms.rotation.value = material.rotation;
    if (material.map) {
      uniforms.map.value = material.map;
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
    let uvScaleMap;
    if (material.map) {
      uvScaleMap = material.map;
    } else if (material.alphaMap) {
      uvScaleMap = material.alphaMap;
    }
    if (uvScaleMap !== void 0) {
      if (uvScaleMap.matrixAutoUpdate === true) {
        uvScaleMap.updateMatrix();
      }
      uniforms.uvTransform.value.copy(uvScaleMap.matrix);
    }
  }
  function refreshUniformsLambert(uniforms, material) {
    if (material.emissiveMap) {
      uniforms.emissiveMap.value = material.emissiveMap;
    }
  }
  function refreshUniformsPhong(uniforms, material) {
    uniforms.specular.value.copy(material.specular);
    uniforms.shininess.value = Math.max(material.shininess, 1e-4);
    if (material.emissiveMap) {
      uniforms.emissiveMap.value = material.emissiveMap;
    }
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide)
        uniforms.bumpScale.value *= -1;
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide)
        uniforms.normalScale.value.negate();
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
  }
  function refreshUniformsToon(uniforms, material) {
    if (material.gradientMap) {
      uniforms.gradientMap.value = material.gradientMap;
    }
    if (material.emissiveMap) {
      uniforms.emissiveMap.value = material.emissiveMap;
    }
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide)
        uniforms.bumpScale.value *= -1;
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide)
        uniforms.normalScale.value.negate();
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
  }
  function refreshUniformsStandard(uniforms, material) {
    uniforms.roughness.value = material.roughness;
    uniforms.metalness.value = material.metalness;
    if (material.roughnessMap) {
      uniforms.roughnessMap.value = material.roughnessMap;
    }
    if (material.metalnessMap) {
      uniforms.metalnessMap.value = material.metalnessMap;
    }
    if (material.emissiveMap) {
      uniforms.emissiveMap.value = material.emissiveMap;
    }
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide)
        uniforms.bumpScale.value *= -1;
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide)
        uniforms.normalScale.value.negate();
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
    const envMap = properties.get(material).envMap;
    if (envMap) {
      uniforms.envMapIntensity.value = material.envMapIntensity;
    }
  }
  function refreshUniformsPhysical(uniforms, material, transmissionRenderTarget) {
    refreshUniformsStandard(uniforms, material);
    uniforms.ior.value = material.ior;
    if (material.sheen > 0) {
      uniforms.sheenColor.value.copy(material.sheenColor).multiplyScalar(material.sheen);
      uniforms.sheenRoughness.value = material.sheenRoughness;
      if (material.sheenColorMap) {
        uniforms.sheenColorMap.value = material.sheenColorMap;
      }
      if (material.sheenRoughnessMap) {
        uniforms.sheenRoughnessMap.value = material.sheenRoughnessMap;
      }
    }
    if (material.clearcoat > 0) {
      uniforms.clearcoat.value = material.clearcoat;
      uniforms.clearcoatRoughness.value = material.clearcoatRoughness;
      if (material.clearcoatMap) {
        uniforms.clearcoatMap.value = material.clearcoatMap;
      }
      if (material.clearcoatRoughnessMap) {
        uniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;
      }
      if (material.clearcoatNormalMap) {
        uniforms.clearcoatNormalScale.value.copy(material.clearcoatNormalScale);
        uniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;
        if (material.side === BackSide) {
          uniforms.clearcoatNormalScale.value.negate();
        }
      }
    }
    if (material.transmission > 0) {
      uniforms.transmission.value = material.transmission;
      uniforms.transmissionSamplerMap.value = transmissionRenderTarget.texture;
      uniforms.transmissionSamplerSize.value.set(transmissionRenderTarget.width, transmissionRenderTarget.height);
      if (material.transmissionMap) {
        uniforms.transmissionMap.value = material.transmissionMap;
      }
      uniforms.thickness.value = material.thickness;
      if (material.thicknessMap) {
        uniforms.thicknessMap.value = material.thicknessMap;
      }
      uniforms.attenuationDistance.value = material.attenuationDistance;
      uniforms.attenuationColor.value.copy(material.attenuationColor);
    }
    uniforms.specularIntensity.value = material.specularIntensity;
    uniforms.specularColor.value.copy(material.specularColor);
    if (material.specularIntensityMap) {
      uniforms.specularIntensityMap.value = material.specularIntensityMap;
    }
    if (material.specularColorMap) {
      uniforms.specularColorMap.value = material.specularColorMap;
    }
  }
  function refreshUniformsMatcap(uniforms, material) {
    if (material.matcap) {
      uniforms.matcap.value = material.matcap;
    }
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide)
        uniforms.bumpScale.value *= -1;
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide)
        uniforms.normalScale.value.negate();
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
  }
  function refreshUniformsDepth(uniforms, material) {
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
  }
  function refreshUniformsDistance(uniforms, material) {
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
    uniforms.referencePosition.value.copy(material.referencePosition);
    uniforms.nearDistance.value = material.nearDistance;
    uniforms.farDistance.value = material.farDistance;
  }
  function refreshUniformsNormal(uniforms, material) {
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide)
        uniforms.bumpScale.value *= -1;
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide)
        uniforms.normalScale.value.negate();
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
  }
  return {
    refreshFogUniforms,
    refreshMaterialUniforms
  };
}
function createCanvasElement() {
  const canvas = createElementNS("canvas");
  canvas.style.display = "block";
  return canvas;
}
function WebGLRenderer(parameters = {}) {
  const _canvas2 = parameters.canvas !== void 0 ? parameters.canvas : createCanvasElement(), _context2 = parameters.context !== void 0 ? parameters.context : null, _alpha = parameters.alpha !== void 0 ? parameters.alpha : false, _depth = parameters.depth !== void 0 ? parameters.depth : true, _stencil = parameters.stencil !== void 0 ? parameters.stencil : true, _antialias = parameters.antialias !== void 0 ? parameters.antialias : false, _premultipliedAlpha = parameters.premultipliedAlpha !== void 0 ? parameters.premultipliedAlpha : true, _preserveDrawingBuffer = parameters.preserveDrawingBuffer !== void 0 ? parameters.preserveDrawingBuffer : false, _powerPreference = parameters.powerPreference !== void 0 ? parameters.powerPreference : "default", _failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== void 0 ? parameters.failIfMajorPerformanceCaveat : false;
  let currentRenderList = null;
  let currentRenderState = null;
  const renderListStack = [];
  const renderStateStack = [];
  this.domElement = _canvas2;
  this.debug = {
    checkShaderErrors: true
  };
  this.autoClear = true;
  this.autoClearColor = true;
  this.autoClearDepth = true;
  this.autoClearStencil = true;
  this.sortObjects = true;
  this.clippingPlanes = [];
  this.localClippingEnabled = false;
  this.outputEncoding = LinearEncoding;
  this.physicallyCorrectLights = false;
  this.toneMapping = NoToneMapping;
  this.toneMappingExposure = 1;
  const _this = this;
  let _isContextLost = false;
  let _currentActiveCubeFace = 0;
  let _currentActiveMipmapLevel = 0;
  let _currentRenderTarget = null;
  let _currentMaterialId = -1;
  let _currentCamera = null;
  const _currentViewport = new Vector4$1();
  const _currentScissor = new Vector4$1();
  let _currentScissorTest = null;
  let _width = _canvas2.width;
  let _height = _canvas2.height;
  let _pixelRatio = 1;
  let _opaqueSort = null;
  let _transparentSort = null;
  const _viewport = new Vector4$1(0, 0, _width, _height);
  const _scissor = new Vector4$1(0, 0, _width, _height);
  let _scissorTest = false;
  const _frustum = new Frustum();
  let _clippingEnabled = false;
  let _localClippingEnabled = false;
  let _transmissionRenderTarget = null;
  const _projScreenMatrix2 = new Matrix4$1();
  const _vector3 = new Vector3$1();
  const _emptyScene = {background: null, fog: null, environment: null, overrideMaterial: null, isScene: true};
  function getTargetPixelRatio() {
    return _currentRenderTarget === null ? _pixelRatio : 1;
  }
  let _gl = _context2;
  function getContext(contextNames, contextAttributes) {
    for (let i = 0; i < contextNames.length; i++) {
      const contextName = contextNames[i];
      const context = _canvas2.getContext(contextName, contextAttributes);
      if (context !== null)
        return context;
    }
    return null;
  }
  try {
    const contextAttributes = {
      alpha: true,
      depth: _depth,
      stencil: _stencil,
      antialias: _antialias,
      premultipliedAlpha: _premultipliedAlpha,
      preserveDrawingBuffer: _preserveDrawingBuffer,
      powerPreference: _powerPreference,
      failIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat
    };
    if ("setAttribute" in _canvas2)
      _canvas2.setAttribute("data-engine", `three.js r${REVISION}`);
    _canvas2.addEventListener("webglcontextlost", onContextLost, false);
    _canvas2.addEventListener("webglcontextrestored", onContextRestore, false);
    if (_gl === null) {
      const contextNames = ["webgl2", "webgl", "experimental-webgl"];
      if (_this.isWebGL1Renderer === true) {
        contextNames.shift();
      }
      _gl = getContext(contextNames, contextAttributes);
      if (_gl === null) {
        if (getContext(contextNames)) {
          throw new Error("Error creating WebGL context with your selected attributes.");
        } else {
          throw new Error("Error creating WebGL context.");
        }
      }
    }
    if (_gl.getShaderPrecisionFormat === void 0) {
      _gl.getShaderPrecisionFormat = function() {
        return {rangeMin: 1, rangeMax: 1, precision: 1};
      };
    }
  } catch (error) {
    console.error("THREE.WebGLRenderer: " + error.message);
    throw error;
  }
  let extensions, capabilities, state, info;
  let properties, textures, cubemaps, cubeuvmaps, attributes, geometries, objects;
  let programCache, materials, renderLists, renderStates, clipping, shadowMap;
  let background, morphtargets, bufferRenderer, indexedBufferRenderer;
  let utils, bindingStates;
  function initGLContext() {
    extensions = new WebGLExtensions(_gl);
    capabilities = new WebGLCapabilities(_gl, extensions, parameters);
    extensions.init(capabilities);
    utils = new WebGLUtils(_gl, extensions, capabilities);
    state = new WebGLState(_gl, extensions, capabilities);
    info = new WebGLInfo();
    properties = new WebGLProperties();
    textures = new WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info);
    cubemaps = new WebGLCubeMaps(_this);
    cubeuvmaps = new WebGLCubeUVMaps(_this);
    attributes = new WebGLAttributes(_gl, capabilities);
    bindingStates = new WebGLBindingStates(_gl, extensions, attributes, capabilities);
    geometries = new WebGLGeometries(_gl, attributes, info, bindingStates);
    objects = new WebGLObjects(_gl, geometries, attributes, info);
    morphtargets = new WebGLMorphtargets(_gl, capabilities, textures);
    clipping = new WebGLClipping(properties);
    programCache = new WebGLPrograms(_this, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping);
    materials = new WebGLMaterials(properties);
    renderLists = new WebGLRenderLists();
    renderStates = new WebGLRenderStates(extensions, capabilities);
    background = new WebGLBackground(_this, cubemaps, state, objects, _alpha, _premultipliedAlpha);
    shadowMap = new WebGLShadowMap(_this, objects, capabilities);
    bufferRenderer = new WebGLBufferRenderer(_gl, extensions, info, capabilities);
    indexedBufferRenderer = new WebGLIndexedBufferRenderer(_gl, extensions, info, capabilities);
    info.programs = programCache.programs;
    _this.capabilities = capabilities;
    _this.extensions = extensions;
    _this.properties = properties;
    _this.renderLists = renderLists;
    _this.shadowMap = shadowMap;
    _this.state = state;
    _this.info = info;
  }
  initGLContext();
  const xr = new WebXRManager(_this, _gl);
  this.xr = xr;
  this.getContext = function() {
    return _gl;
  };
  this.getContextAttributes = function() {
    return _gl.getContextAttributes();
  };
  this.forceContextLoss = function() {
    const extension = extensions.get("WEBGL_lose_context");
    if (extension)
      extension.loseContext();
  };
  this.forceContextRestore = function() {
    const extension = extensions.get("WEBGL_lose_context");
    if (extension)
      extension.restoreContext();
  };
  this.getPixelRatio = function() {
    return _pixelRatio;
  };
  this.setPixelRatio = function(value) {
    if (value === void 0)
      return;
    _pixelRatio = value;
    this.setSize(_width, _height, false);
  };
  this.getSize = function(target) {
    return target.set(_width, _height);
  };
  this.setSize = function(width, height, updateStyle) {
    if (xr.isPresenting) {
      console.warn("THREE.WebGLRenderer: Can't change size while VR device is presenting.");
      return;
    }
    _width = width;
    _height = height;
    _canvas2.width = Math.floor(width * _pixelRatio);
    _canvas2.height = Math.floor(height * _pixelRatio);
    if (updateStyle !== false) {
      _canvas2.style.width = width + "px";
      _canvas2.style.height = height + "px";
    }
    this.setViewport(0, 0, width, height);
  };
  this.getDrawingBufferSize = function(target) {
    return target.set(_width * _pixelRatio, _height * _pixelRatio).floor();
  };
  this.setDrawingBufferSize = function(width, height, pixelRatio) {
    _width = width;
    _height = height;
    _pixelRatio = pixelRatio;
    _canvas2.width = Math.floor(width * pixelRatio);
    _canvas2.height = Math.floor(height * pixelRatio);
    this.setViewport(0, 0, width, height);
  };
  this.getCurrentViewport = function(target) {
    return target.copy(_currentViewport);
  };
  this.getViewport = function(target) {
    return target.copy(_viewport);
  };
  this.setViewport = function(x, y, width, height) {
    if (x.isVector4) {
      _viewport.set(x.x, x.y, x.z, x.w);
    } else {
      _viewport.set(x, y, width, height);
    }
    state.viewport(_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor());
  };
  this.getScissor = function(target) {
    return target.copy(_scissor);
  };
  this.setScissor = function(x, y, width, height) {
    if (x.isVector4) {
      _scissor.set(x.x, x.y, x.z, x.w);
    } else {
      _scissor.set(x, y, width, height);
    }
    state.scissor(_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor());
  };
  this.getScissorTest = function() {
    return _scissorTest;
  };
  this.setScissorTest = function(boolean) {
    state.setScissorTest(_scissorTest = boolean);
  };
  this.setOpaqueSort = function(method) {
    _opaqueSort = method;
  };
  this.setTransparentSort = function(method) {
    _transparentSort = method;
  };
  this.getClearColor = function(target) {
    return target.copy(background.getClearColor());
  };
  this.setClearColor = function() {
    background.setClearColor.apply(background, arguments);
  };
  this.getClearAlpha = function() {
    return background.getClearAlpha();
  };
  this.setClearAlpha = function() {
    background.setClearAlpha.apply(background, arguments);
  };
  this.clear = function(color, depth, stencil) {
    let bits = 0;
    if (color === void 0 || color)
      bits |= 16384;
    if (depth === void 0 || depth)
      bits |= 256;
    if (stencil === void 0 || stencil)
      bits |= 1024;
    _gl.clear(bits);
  };
  this.clearColor = function() {
    this.clear(true, false, false);
  };
  this.clearDepth = function() {
    this.clear(false, true, false);
  };
  this.clearStencil = function() {
    this.clear(false, false, true);
  };
  this.dispose = function() {
    _canvas2.removeEventListener("webglcontextlost", onContextLost, false);
    _canvas2.removeEventListener("webglcontextrestored", onContextRestore, false);
    renderLists.dispose();
    renderStates.dispose();
    properties.dispose();
    cubemaps.dispose();
    cubeuvmaps.dispose();
    objects.dispose();
    bindingStates.dispose();
    programCache.dispose();
    xr.dispose();
    xr.removeEventListener("sessionstart", onXRSessionStart);
    xr.removeEventListener("sessionend", onXRSessionEnd);
    if (_transmissionRenderTarget) {
      _transmissionRenderTarget.dispose();
      _transmissionRenderTarget = null;
    }
    animation.stop();
  };
  function onContextLost(event) {
    event.preventDefault();
    console.log("THREE.WebGLRenderer: Context Lost.");
    _isContextLost = true;
  }
  function onContextRestore() {
    console.log("THREE.WebGLRenderer: Context Restored.");
    _isContextLost = false;
    const infoAutoReset = info.autoReset;
    const shadowMapEnabled = shadowMap.enabled;
    const shadowMapAutoUpdate = shadowMap.autoUpdate;
    const shadowMapNeedsUpdate = shadowMap.needsUpdate;
    const shadowMapType = shadowMap.type;
    initGLContext();
    info.autoReset = infoAutoReset;
    shadowMap.enabled = shadowMapEnabled;
    shadowMap.autoUpdate = shadowMapAutoUpdate;
    shadowMap.needsUpdate = shadowMapNeedsUpdate;
    shadowMap.type = shadowMapType;
  }
  function onMaterialDispose(event) {
    const material = event.target;
    material.removeEventListener("dispose", onMaterialDispose);
    deallocateMaterial(material);
  }
  function deallocateMaterial(material) {
    releaseMaterialProgramReferences(material);
    properties.remove(material);
  }
  function releaseMaterialProgramReferences(material) {
    const programs = properties.get(material).programs;
    if (programs !== void 0) {
      programs.forEach(function(program) {
        programCache.releaseProgram(program);
      });
      if (material.isShaderMaterial) {
        programCache.releaseShaderCache(material);
      }
    }
  }
  this.renderBufferDirect = function(camera, scene, geometry, material, object, group) {
    if (scene === null)
      scene = _emptyScene;
    const frontFaceCW = object.isMesh && object.matrixWorld.determinant() < 0;
    const program = setProgram(camera, scene, geometry, material, object);
    state.setMaterial(material, frontFaceCW);
    let index = geometry.index;
    const position = geometry.attributes.position;
    if (index === null) {
      if (position === void 0 || position.count === 0)
        return;
    } else if (index.count === 0) {
      return;
    }
    let rangeFactor = 1;
    if (material.wireframe === true) {
      index = geometries.getWireframeAttribute(geometry);
      rangeFactor = 2;
    }
    bindingStates.setup(object, material, program, geometry, index);
    let attribute;
    let renderer = bufferRenderer;
    if (index !== null) {
      attribute = attributes.get(index);
      renderer = indexedBufferRenderer;
      renderer.setIndex(attribute);
    }
    const dataCount = index !== null ? index.count : position.count;
    const rangeStart = geometry.drawRange.start * rangeFactor;
    const rangeCount = geometry.drawRange.count * rangeFactor;
    const groupStart = group !== null ? group.start * rangeFactor : 0;
    const groupCount = group !== null ? group.count * rangeFactor : Infinity;
    const drawStart = Math.max(rangeStart, groupStart);
    const drawEnd = Math.min(dataCount, rangeStart + rangeCount, groupStart + groupCount) - 1;
    const drawCount = Math.max(0, drawEnd - drawStart + 1);
    if (drawCount === 0)
      return;
    if (object.isMesh) {
      if (material.wireframe === true) {
        state.setLineWidth(material.wireframeLinewidth * getTargetPixelRatio());
        renderer.setMode(1);
      } else {
        renderer.setMode(4);
      }
    } else if (object.isLine) {
      let lineWidth = material.linewidth;
      if (lineWidth === void 0)
        lineWidth = 1;
      state.setLineWidth(lineWidth * getTargetPixelRatio());
      if (object.isLineSegments) {
        renderer.setMode(1);
      } else if (object.isLineLoop) {
        renderer.setMode(2);
      } else {
        renderer.setMode(3);
      }
    } else if (object.isPoints) {
      renderer.setMode(0);
    } else if (object.isSprite) {
      renderer.setMode(4);
    }
    if (object.isInstancedMesh) {
      renderer.renderInstances(drawStart, drawCount, object.count);
    } else if (geometry.isInstancedBufferGeometry) {
      const instanceCount = Math.min(geometry.instanceCount, geometry._maxInstanceCount);
      renderer.renderInstances(drawStart, drawCount, instanceCount);
    } else {
      renderer.render(drawStart, drawCount);
    }
  };
  this.compile = function(scene, camera) {
    currentRenderState = renderStates.get(scene);
    currentRenderState.init();
    renderStateStack.push(currentRenderState);
    scene.traverseVisible(function(object) {
      if (object.isLight && object.layers.test(camera.layers)) {
        currentRenderState.pushLight(object);
        if (object.castShadow) {
          currentRenderState.pushShadow(object);
        }
      }
    });
    currentRenderState.setupLights(_this.physicallyCorrectLights);
    scene.traverse(function(object) {
      const material = object.material;
      if (material) {
        if (Array.isArray(material)) {
          for (let i = 0; i < material.length; i++) {
            const material2 = material[i];
            getProgram(material2, scene, object);
          }
        } else {
          getProgram(material, scene, object);
        }
      }
    });
    renderStateStack.pop();
    currentRenderState = null;
  };
  let onAnimationFrameCallback = null;
  function onAnimationFrame(time) {
    if (onAnimationFrameCallback)
      onAnimationFrameCallback(time);
  }
  function onXRSessionStart() {
    animation.stop();
  }
  function onXRSessionEnd() {
    animation.start();
  }
  const animation = new WebGLAnimation();
  animation.setAnimationLoop(onAnimationFrame);
  if (typeof window !== "undefined")
    animation.setContext(window);
  this.setAnimationLoop = function(callback) {
    onAnimationFrameCallback = callback;
    xr.setAnimationLoop(callback);
    callback === null ? animation.stop() : animation.start();
  };
  xr.addEventListener("sessionstart", onXRSessionStart);
  xr.addEventListener("sessionend", onXRSessionEnd);
  this.render = function(scene, camera) {
    if (camera !== void 0 && camera.isCamera !== true) {
      console.error("THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.");
      return;
    }
    if (_isContextLost === true)
      return;
    if (scene.autoUpdate === true)
      scene.updateMatrixWorld();
    if (camera.parent === null)
      camera.updateMatrixWorld();
    if (xr.enabled === true && xr.isPresenting === true) {
      if (xr.cameraAutoUpdate === true)
        xr.updateCamera(camera);
      camera = xr.getCamera();
    }
    if (scene.isScene === true)
      scene.onBeforeRender(_this, scene, camera, _currentRenderTarget);
    currentRenderState = renderStates.get(scene, renderStateStack.length);
    currentRenderState.init();
    renderStateStack.push(currentRenderState);
    _projScreenMatrix2.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
    _frustum.setFromProjectionMatrix(_projScreenMatrix2);
    _localClippingEnabled = this.localClippingEnabled;
    _clippingEnabled = clipping.init(this.clippingPlanes, _localClippingEnabled, camera);
    currentRenderList = renderLists.get(scene, renderListStack.length);
    currentRenderList.init();
    renderListStack.push(currentRenderList);
    projectObject(scene, camera, 0, _this.sortObjects);
    currentRenderList.finish();
    if (_this.sortObjects === true) {
      currentRenderList.sort(_opaqueSort, _transparentSort);
    }
    if (_clippingEnabled === true)
      clipping.beginShadows();
    const shadowsArray = currentRenderState.state.shadowsArray;
    shadowMap.render(shadowsArray, scene, camera);
    if (_clippingEnabled === true)
      clipping.endShadows();
    if (this.info.autoReset === true)
      this.info.reset();
    background.render(currentRenderList, scene);
    currentRenderState.setupLights(_this.physicallyCorrectLights);
    if (camera.isArrayCamera) {
      const cameras = camera.cameras;
      for (let i = 0, l = cameras.length; i < l; i++) {
        const camera2 = cameras[i];
        renderScene(currentRenderList, scene, camera2, camera2.viewport);
      }
    } else {
      renderScene(currentRenderList, scene, camera);
    }
    if (_currentRenderTarget !== null) {
      textures.updateMultisampleRenderTarget(_currentRenderTarget);
      textures.updateRenderTargetMipmap(_currentRenderTarget);
    }
    if (scene.isScene === true)
      scene.onAfterRender(_this, scene, camera);
    state.buffers.depth.setTest(true);
    state.buffers.depth.setMask(true);
    state.buffers.color.setMask(true);
    state.setPolygonOffset(false);
    bindingStates.resetDefaultState();
    _currentMaterialId = -1;
    _currentCamera = null;
    renderStateStack.pop();
    if (renderStateStack.length > 0) {
      currentRenderState = renderStateStack[renderStateStack.length - 1];
    } else {
      currentRenderState = null;
    }
    renderListStack.pop();
    if (renderListStack.length > 0) {
      currentRenderList = renderListStack[renderListStack.length - 1];
    } else {
      currentRenderList = null;
    }
  };
  function projectObject(object, camera, groupOrder, sortObjects) {
    if (object.visible === false)
      return;
    const visible = object.layers.test(camera.layers);
    if (visible) {
      if (object.isGroup) {
        groupOrder = object.renderOrder;
      } else if (object.isLOD) {
        if (object.autoUpdate === true)
          object.update(camera);
      } else if (object.isLight) {
        currentRenderState.pushLight(object);
        if (object.castShadow) {
          currentRenderState.pushShadow(object);
        }
      } else if (object.isSprite) {
        if (!object.frustumCulled || _frustum.intersectsSprite(object)) {
          if (sortObjects) {
            _vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix2);
          }
          const geometry = objects.update(object);
          const material = object.material;
          if (material.visible) {
            currentRenderList.push(object, geometry, material, groupOrder, _vector3.z, null);
          }
        }
      } else if (object.isMesh || object.isLine || object.isPoints) {
        if (object.isSkinnedMesh) {
          if (object.skeleton.frame !== info.render.frame) {
            object.skeleton.update();
            object.skeleton.frame = info.render.frame;
          }
        }
        if (!object.frustumCulled || _frustum.intersectsObject(object)) {
          if (sortObjects) {
            _vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix2);
          }
          const geometry = objects.update(object);
          const material = object.material;
          if (Array.isArray(material)) {
            const groups = geometry.groups;
            for (let i = 0, l = groups.length; i < l; i++) {
              const group = groups[i];
              const groupMaterial = material[group.materialIndex];
              if (groupMaterial && groupMaterial.visible) {
                currentRenderList.push(object, geometry, groupMaterial, groupOrder, _vector3.z, group);
              }
            }
          } else if (material.visible) {
            currentRenderList.push(object, geometry, material, groupOrder, _vector3.z, null);
          }
        }
      }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      projectObject(children[i], camera, groupOrder, sortObjects);
    }
  }
  function renderScene(currentRenderList2, scene, camera, viewport) {
    const opaqueObjects = currentRenderList2.opaque;
    const transmissiveObjects = currentRenderList2.transmissive;
    const transparentObjects = currentRenderList2.transparent;
    currentRenderState.setupLightsView(camera);
    if (transmissiveObjects.length > 0)
      renderTransmissionPass(opaqueObjects, scene, camera);
    if (viewport)
      state.viewport(_currentViewport.copy(viewport));
    if (opaqueObjects.length > 0)
      renderObjects(opaqueObjects, scene, camera);
    if (transmissiveObjects.length > 0)
      renderObjects(transmissiveObjects, scene, camera);
    if (transparentObjects.length > 0)
      renderObjects(transparentObjects, scene, camera);
  }
  function renderTransmissionPass(opaqueObjects, scene, camera) {
    if (_transmissionRenderTarget === null) {
      const needsAntialias = _antialias === true && capabilities.isWebGL2 === true;
      const renderTargetType = needsAntialias ? WebGLMultisampleRenderTarget : WebGLRenderTarget;
      _transmissionRenderTarget = new renderTargetType(1024, 1024, {
        generateMipmaps: true,
        type: utils.convert(HalfFloatType) !== null ? HalfFloatType : UnsignedByteType,
        minFilter: LinearMipmapLinearFilter,
        magFilter: NearestFilter,
        wrapS: ClampToEdgeWrapping,
        wrapT: ClampToEdgeWrapping,
        useRenderToTexture: extensions.has("WEBGL_multisampled_render_to_texture")
      });
    }
    const currentRenderTarget = _this.getRenderTarget();
    _this.setRenderTarget(_transmissionRenderTarget);
    _this.clear();
    const currentToneMapping = _this.toneMapping;
    _this.toneMapping = NoToneMapping;
    renderObjects(opaqueObjects, scene, camera);
    _this.toneMapping = currentToneMapping;
    textures.updateMultisampleRenderTarget(_transmissionRenderTarget);
    textures.updateRenderTargetMipmap(_transmissionRenderTarget);
    _this.setRenderTarget(currentRenderTarget);
  }
  function renderObjects(renderList, scene, camera) {
    const overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;
    for (let i = 0, l = renderList.length; i < l; i++) {
      const renderItem = renderList[i];
      const object = renderItem.object;
      const geometry = renderItem.geometry;
      const material = overrideMaterial === null ? renderItem.material : overrideMaterial;
      const group = renderItem.group;
      if (object.layers.test(camera.layers)) {
        renderObject(object, scene, camera, geometry, material, group);
      }
    }
  }
  function renderObject(object, scene, camera, geometry, material, group) {
    object.onBeforeRender(_this, scene, camera, geometry, material, group);
    object.modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);
    object.normalMatrix.getNormalMatrix(object.modelViewMatrix);
    material.onBeforeRender(_this, scene, camera, geometry, object, group);
    if (material.transparent === true && material.side === DoubleSide) {
      material.side = BackSide;
      material.needsUpdate = true;
      _this.renderBufferDirect(camera, scene, geometry, material, object, group);
      material.side = FrontSide;
      material.needsUpdate = true;
      _this.renderBufferDirect(camera, scene, geometry, material, object, group);
      material.side = DoubleSide;
    } else {
      _this.renderBufferDirect(camera, scene, geometry, material, object, group);
    }
    object.onAfterRender(_this, scene, camera, geometry, material, group);
  }
  function getProgram(material, scene, object) {
    if (scene.isScene !== true)
      scene = _emptyScene;
    const materialProperties = properties.get(material);
    const lights = currentRenderState.state.lights;
    const shadowsArray = currentRenderState.state.shadowsArray;
    const lightsStateVersion = lights.state.version;
    const parameters2 = programCache.getParameters(material, lights.state, shadowsArray, scene, object);
    const programCacheKey = programCache.getProgramCacheKey(parameters2);
    let programs = materialProperties.programs;
    materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
    materialProperties.fog = scene.fog;
    materialProperties.envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || materialProperties.environment);
    if (programs === void 0) {
      material.addEventListener("dispose", onMaterialDispose);
      programs = new Map();
      materialProperties.programs = programs;
    }
    let program = programs.get(programCacheKey);
    if (program !== void 0) {
      if (materialProperties.currentProgram === program && materialProperties.lightsStateVersion === lightsStateVersion) {
        updateCommonMaterialProperties(material, parameters2);
        return program;
      }
    } else {
      parameters2.uniforms = programCache.getUniforms(material);
      material.onBuild(object, parameters2, _this);
      material.onBeforeCompile(parameters2, _this);
      program = programCache.acquireProgram(parameters2, programCacheKey);
      programs.set(programCacheKey, program);
      materialProperties.uniforms = parameters2.uniforms;
    }
    const uniforms = materialProperties.uniforms;
    if (!material.isShaderMaterial && !material.isRawShaderMaterial || material.clipping === true) {
      uniforms.clippingPlanes = clipping.uniform;
    }
    updateCommonMaterialProperties(material, parameters2);
    materialProperties.needsLights = materialNeedsLights(material);
    materialProperties.lightsStateVersion = lightsStateVersion;
    if (materialProperties.needsLights) {
      uniforms.ambientLightColor.value = lights.state.ambient;
      uniforms.lightProbe.value = lights.state.probe;
      uniforms.directionalLights.value = lights.state.directional;
      uniforms.directionalLightShadows.value = lights.state.directionalShadow;
      uniforms.spotLights.value = lights.state.spot;
      uniforms.spotLightShadows.value = lights.state.spotShadow;
      uniforms.rectAreaLights.value = lights.state.rectArea;
      uniforms.ltc_1.value = lights.state.rectAreaLTC1;
      uniforms.ltc_2.value = lights.state.rectAreaLTC2;
      uniforms.pointLights.value = lights.state.point;
      uniforms.pointLightShadows.value = lights.state.pointShadow;
      uniforms.hemisphereLights.value = lights.state.hemi;
      uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
      uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
      uniforms.spotShadowMap.value = lights.state.spotShadowMap;
      uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
      uniforms.pointShadowMap.value = lights.state.pointShadowMap;
      uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;
    }
    const progUniforms = program.getUniforms();
    const uniformsList = WebGLUniforms.seqWithValue(progUniforms.seq, uniforms);
    materialProperties.currentProgram = program;
    materialProperties.uniformsList = uniformsList;
    return program;
  }
  function updateCommonMaterialProperties(material, parameters2) {
    const materialProperties = properties.get(material);
    materialProperties.outputEncoding = parameters2.outputEncoding;
    materialProperties.instancing = parameters2.instancing;
    materialProperties.skinning = parameters2.skinning;
    materialProperties.morphTargets = parameters2.morphTargets;
    materialProperties.morphNormals = parameters2.morphNormals;
    materialProperties.morphTargetsCount = parameters2.morphTargetsCount;
    materialProperties.numClippingPlanes = parameters2.numClippingPlanes;
    materialProperties.numIntersection = parameters2.numClipIntersection;
    materialProperties.vertexAlphas = parameters2.vertexAlphas;
    materialProperties.vertexTangents = parameters2.vertexTangents;
    materialProperties.toneMapping = parameters2.toneMapping;
  }
  function setProgram(camera, scene, geometry, material, object) {
    if (scene.isScene !== true)
      scene = _emptyScene;
    textures.resetTextureUnits();
    const fog = scene.fog;
    const environment = material.isMeshStandardMaterial ? scene.environment : null;
    const encoding = _currentRenderTarget === null ? _this.outputEncoding : _currentRenderTarget.isXRRenderTarget === true ? _currentRenderTarget.texture.encoding : LinearEncoding;
    const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
    const vertexAlphas = material.vertexColors === true && !!geometry.attributes.color && geometry.attributes.color.itemSize === 4;
    const vertexTangents = !!material.normalMap && !!geometry.attributes.tangent;
    const morphTargets = !!geometry.morphAttributes.position;
    const morphNormals = !!geometry.morphAttributes.normal;
    const morphTargetsCount = !!geometry.morphAttributes.position ? geometry.morphAttributes.position.length : 0;
    const toneMapping = material.toneMapped ? _this.toneMapping : NoToneMapping;
    const materialProperties = properties.get(material);
    const lights = currentRenderState.state.lights;
    if (_clippingEnabled === true) {
      if (_localClippingEnabled === true || camera !== _currentCamera) {
        const useCache = camera === _currentCamera && material.id === _currentMaterialId;
        clipping.setState(material, camera, useCache);
      }
    }
    let needsProgramChange = false;
    if (material.version === materialProperties.__version) {
      if (materialProperties.needsLights && materialProperties.lightsStateVersion !== lights.state.version) {
        needsProgramChange = true;
      } else if (materialProperties.outputEncoding !== encoding) {
        needsProgramChange = true;
      } else if (object.isInstancedMesh && materialProperties.instancing === false) {
        needsProgramChange = true;
      } else if (!object.isInstancedMesh && materialProperties.instancing === true) {
        needsProgramChange = true;
      } else if (object.isSkinnedMesh && materialProperties.skinning === false) {
        needsProgramChange = true;
      } else if (!object.isSkinnedMesh && materialProperties.skinning === true) {
        needsProgramChange = true;
      } else if (materialProperties.envMap !== envMap) {
        needsProgramChange = true;
      } else if (material.fog && materialProperties.fog !== fog) {
        needsProgramChange = true;
      } else if (materialProperties.numClippingPlanes !== void 0 && (materialProperties.numClippingPlanes !== clipping.numPlanes || materialProperties.numIntersection !== clipping.numIntersection)) {
        needsProgramChange = true;
      } else if (materialProperties.vertexAlphas !== vertexAlphas) {
        needsProgramChange = true;
      } else if (materialProperties.vertexTangents !== vertexTangents) {
        needsProgramChange = true;
      } else if (materialProperties.morphTargets !== morphTargets) {
        needsProgramChange = true;
      } else if (materialProperties.morphNormals !== morphNormals) {
        needsProgramChange = true;
      } else if (materialProperties.toneMapping !== toneMapping) {
        needsProgramChange = true;
      } else if (capabilities.isWebGL2 === true && materialProperties.morphTargetsCount !== morphTargetsCount) {
        needsProgramChange = true;
      }
    } else {
      needsProgramChange = true;
      materialProperties.__version = material.version;
    }
    let program = materialProperties.currentProgram;
    if (needsProgramChange === true) {
      program = getProgram(material, scene, object);
    }
    let refreshProgram = false;
    let refreshMaterial = false;
    let refreshLights = false;
    const p_uniforms = program.getUniforms(), m_uniforms = materialProperties.uniforms;
    if (state.useProgram(program.program)) {
      refreshProgram = true;
      refreshMaterial = true;
      refreshLights = true;
    }
    if (material.id !== _currentMaterialId) {
      _currentMaterialId = material.id;
      refreshMaterial = true;
    }
    if (refreshProgram || _currentCamera !== camera) {
      p_uniforms.setValue(_gl, "projectionMatrix", camera.projectionMatrix);
      if (capabilities.logarithmicDepthBuffer) {
        p_uniforms.setValue(_gl, "logDepthBufFC", 2 / (Math.log(camera.far + 1) / Math.LN2));
      }
      if (_currentCamera !== camera) {
        _currentCamera = camera;
        refreshMaterial = true;
        refreshLights = true;
      }
      if (material.isShaderMaterial || material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshStandardMaterial || material.envMap) {
        const uCamPos = p_uniforms.map.cameraPosition;
        if (uCamPos !== void 0) {
          uCamPos.setValue(_gl, _vector3.setFromMatrixPosition(camera.matrixWorld));
        }
      }
      if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial) {
        p_uniforms.setValue(_gl, "isOrthographic", camera.isOrthographicCamera === true);
      }
      if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial || material.isShadowMaterial || object.isSkinnedMesh) {
        p_uniforms.setValue(_gl, "viewMatrix", camera.matrixWorldInverse);
      }
    }
    if (object.isSkinnedMesh) {
      p_uniforms.setOptional(_gl, object, "bindMatrix");
      p_uniforms.setOptional(_gl, object, "bindMatrixInverse");
      const skeleton = object.skeleton;
      if (skeleton) {
        if (capabilities.floatVertexTextures) {
          if (skeleton.boneTexture === null)
            skeleton.computeBoneTexture();
          p_uniforms.setValue(_gl, "boneTexture", skeleton.boneTexture, textures);
          p_uniforms.setValue(_gl, "boneTextureSize", skeleton.boneTextureSize);
        } else {
          p_uniforms.setOptional(_gl, skeleton, "boneMatrices");
        }
      }
    }
    if (!!geometry && (geometry.morphAttributes.position !== void 0 || geometry.morphAttributes.normal !== void 0)) {
      morphtargets.update(object, geometry, material, program);
    }
    if (refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow) {
      materialProperties.receiveShadow = object.receiveShadow;
      p_uniforms.setValue(_gl, "receiveShadow", object.receiveShadow);
    }
    if (refreshMaterial) {
      p_uniforms.setValue(_gl, "toneMappingExposure", _this.toneMappingExposure);
      if (materialProperties.needsLights) {
        markUniformsLightsNeedsUpdate(m_uniforms, refreshLights);
      }
      if (fog && material.fog) {
        materials.refreshFogUniforms(m_uniforms, fog);
      }
      materials.refreshMaterialUniforms(m_uniforms, material, _pixelRatio, _height, _transmissionRenderTarget);
      WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
    }
    if (material.isShaderMaterial && material.uniformsNeedUpdate === true) {
      WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
      material.uniformsNeedUpdate = false;
    }
    if (material.isSpriteMaterial) {
      p_uniforms.setValue(_gl, "center", object.center);
    }
    p_uniforms.setValue(_gl, "modelViewMatrix", object.modelViewMatrix);
    p_uniforms.setValue(_gl, "normalMatrix", object.normalMatrix);
    p_uniforms.setValue(_gl, "modelMatrix", object.matrixWorld);
    return program;
  }
  function markUniformsLightsNeedsUpdate(uniforms, value) {
    uniforms.ambientLightColor.needsUpdate = value;
    uniforms.lightProbe.needsUpdate = value;
    uniforms.directionalLights.needsUpdate = value;
    uniforms.directionalLightShadows.needsUpdate = value;
    uniforms.pointLights.needsUpdate = value;
    uniforms.pointLightShadows.needsUpdate = value;
    uniforms.spotLights.needsUpdate = value;
    uniforms.spotLightShadows.needsUpdate = value;
    uniforms.rectAreaLights.needsUpdate = value;
    uniforms.hemisphereLights.needsUpdate = value;
  }
  function materialNeedsLights(material) {
    return material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial || material.isMeshStandardMaterial || material.isShadowMaterial || material.isShaderMaterial && material.lights === true;
  }
  this.getActiveCubeFace = function() {
    return _currentActiveCubeFace;
  };
  this.getActiveMipmapLevel = function() {
    return _currentActiveMipmapLevel;
  };
  this.getRenderTarget = function() {
    return _currentRenderTarget;
  };
  this.setRenderTargetTextures = function(renderTarget, colorTexture, depthTexture) {
    properties.get(renderTarget.texture).__webglTexture = colorTexture;
    properties.get(renderTarget.depthTexture).__webglTexture = depthTexture;
    const renderTargetProperties = properties.get(renderTarget);
    renderTargetProperties.__hasExternalTextures = true;
    if (renderTargetProperties.__hasExternalTextures) {
      renderTargetProperties.__autoAllocateDepthBuffer = depthTexture === void 0;
      if (!renderTargetProperties.__autoAllocateDepthBuffer) {
        if (renderTarget.useRenderToTexture) {
          console.warn("render-to-texture extension was disabled because an external texture was provided");
          renderTarget.useRenderToTexture = false;
          renderTarget.useRenderbuffer = true;
        }
      }
    }
  };
  this.setRenderTargetFramebuffer = function(renderTarget, defaultFramebuffer) {
    const renderTargetProperties = properties.get(renderTarget);
    renderTargetProperties.__webglFramebuffer = defaultFramebuffer;
    renderTargetProperties.__useDefaultFramebuffer = defaultFramebuffer === void 0;
  };
  this.setRenderTarget = function(renderTarget, activeCubeFace = 0, activeMipmapLevel = 0) {
    _currentRenderTarget = renderTarget;
    _currentActiveCubeFace = activeCubeFace;
    _currentActiveMipmapLevel = activeMipmapLevel;
    let useDefaultFramebuffer = true;
    if (renderTarget) {
      const renderTargetProperties = properties.get(renderTarget);
      if (renderTargetProperties.__useDefaultFramebuffer !== void 0) {
        state.bindFramebuffer(36160, null);
        useDefaultFramebuffer = false;
      } else if (renderTargetProperties.__webglFramebuffer === void 0) {
        textures.setupRenderTarget(renderTarget);
      } else if (renderTargetProperties.__hasExternalTextures) {
        textures.rebindTextures(renderTarget, properties.get(renderTarget.texture).__webglTexture, properties.get(renderTarget.depthTexture).__webglTexture);
      }
    }
    let framebuffer = null;
    let isCube = false;
    let isRenderTarget3D = false;
    if (renderTarget) {
      const texture = renderTarget.texture;
      if (texture.isDataTexture3D || texture.isDataTexture2DArray) {
        isRenderTarget3D = true;
      }
      const __webglFramebuffer = properties.get(renderTarget).__webglFramebuffer;
      if (renderTarget.isWebGLCubeRenderTarget) {
        framebuffer = __webglFramebuffer[activeCubeFace];
        isCube = true;
      } else if (renderTarget.useRenderbuffer) {
        framebuffer = properties.get(renderTarget).__webglMultisampledFramebuffer;
      } else {
        framebuffer = __webglFramebuffer;
      }
      _currentViewport.copy(renderTarget.viewport);
      _currentScissor.copy(renderTarget.scissor);
      _currentScissorTest = renderTarget.scissorTest;
    } else {
      _currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor();
      _currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor();
      _currentScissorTest = _scissorTest;
    }
    const framebufferBound = state.bindFramebuffer(36160, framebuffer);
    if (framebufferBound && capabilities.drawBuffers && useDefaultFramebuffer) {
      state.drawBuffers(renderTarget, framebuffer);
    }
    state.viewport(_currentViewport);
    state.scissor(_currentScissor);
    state.setScissorTest(_currentScissorTest);
    if (isCube) {
      const textureProperties = properties.get(renderTarget.texture);
      _gl.framebufferTexture2D(36160, 36064, 34069 + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel);
    } else if (isRenderTarget3D) {
      const textureProperties = properties.get(renderTarget.texture);
      const layer = activeCubeFace || 0;
      _gl.framebufferTextureLayer(36160, 36064, textureProperties.__webglTexture, activeMipmapLevel || 0, layer);
    }
    _currentMaterialId = -1;
  };
  this.readRenderTargetPixels = function(renderTarget, x, y, width, height, buffer, activeCubeFaceIndex) {
    if (!(renderTarget && renderTarget.isWebGLRenderTarget)) {
      console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.");
      return;
    }
    let framebuffer = properties.get(renderTarget).__webglFramebuffer;
    if (renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== void 0) {
      framebuffer = framebuffer[activeCubeFaceIndex];
    }
    if (framebuffer) {
      state.bindFramebuffer(36160, framebuffer);
      try {
        const texture = renderTarget.texture;
        const textureFormat = texture.format;
        const textureType = texture.type;
        if (textureFormat !== RGBAFormat && utils.convert(textureFormat) !== _gl.getParameter(35739)) {
          console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.");
          return;
        }
        const halfFloatSupportedByExt = textureType === HalfFloatType && (extensions.has("EXT_color_buffer_half_float") || capabilities.isWebGL2 && extensions.has("EXT_color_buffer_float"));
        if (textureType !== UnsignedByteType && utils.convert(textureType) !== _gl.getParameter(35738) && !(textureType === FloatType && (capabilities.isWebGL2 || extensions.has("OES_texture_float") || extensions.has("WEBGL_color_buffer_float"))) && !halfFloatSupportedByExt) {
          console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.");
          return;
        }
        if (_gl.checkFramebufferStatus(36160) === 36053) {
          if (x >= 0 && x <= renderTarget.width - width && (y >= 0 && y <= renderTarget.height - height)) {
            _gl.readPixels(x, y, width, height, utils.convert(textureFormat), utils.convert(textureType), buffer);
          }
        } else {
          console.error("THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.");
        }
      } finally {
        const framebuffer2 = _currentRenderTarget !== null ? properties.get(_currentRenderTarget).__webglFramebuffer : null;
        state.bindFramebuffer(36160, framebuffer2);
      }
    }
  };
  this.copyFramebufferToTexture = function(position, texture, level = 0) {
    if (texture.isFramebufferTexture !== true) {
      console.error("THREE.WebGLRenderer: copyFramebufferToTexture() can only be used with FramebufferTexture.");
      return;
    }
    const levelScale = Math.pow(2, -level);
    const width = Math.floor(texture.image.width * levelScale);
    const height = Math.floor(texture.image.height * levelScale);
    textures.setTexture2D(texture, 0);
    _gl.copyTexSubImage2D(3553, level, 0, 0, position.x, position.y, width, height);
    state.unbindTexture();
  };
  this.copyTextureToTexture = function(position, srcTexture, dstTexture, level = 0) {
    const width = srcTexture.image.width;
    const height = srcTexture.image.height;
    const glFormat = utils.convert(dstTexture.format);
    const glType = utils.convert(dstTexture.type);
    textures.setTexture2D(dstTexture, 0);
    _gl.pixelStorei(37440, dstTexture.flipY);
    _gl.pixelStorei(37441, dstTexture.premultiplyAlpha);
    _gl.pixelStorei(3317, dstTexture.unpackAlignment);
    if (srcTexture.isDataTexture) {
      _gl.texSubImage2D(3553, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data);
    } else {
      if (srcTexture.isCompressedTexture) {
        _gl.compressedTexSubImage2D(3553, level, position.x, position.y, srcTexture.mipmaps[0].width, srcTexture.mipmaps[0].height, glFormat, srcTexture.mipmaps[0].data);
      } else {
        _gl.texSubImage2D(3553, level, position.x, position.y, glFormat, glType, srcTexture.image);
      }
    }
    if (level === 0 && dstTexture.generateMipmaps)
      _gl.generateMipmap(3553);
    state.unbindTexture();
  };
  this.copyTextureToTexture3D = function(sourceBox, position, srcTexture, dstTexture, level = 0) {
    if (_this.isWebGL1Renderer) {
      console.warn("THREE.WebGLRenderer.copyTextureToTexture3D: can only be used with WebGL2.");
      return;
    }
    const width = sourceBox.max.x - sourceBox.min.x + 1;
    const height = sourceBox.max.y - sourceBox.min.y + 1;
    const depth = sourceBox.max.z - sourceBox.min.z + 1;
    const glFormat = utils.convert(dstTexture.format);
    const glType = utils.convert(dstTexture.type);
    let glTarget;
    if (dstTexture.isDataTexture3D) {
      textures.setTexture3D(dstTexture, 0);
      glTarget = 32879;
    } else if (dstTexture.isDataTexture2DArray) {
      textures.setTexture2DArray(dstTexture, 0);
      glTarget = 35866;
    } else {
      console.warn("THREE.WebGLRenderer.copyTextureToTexture3D: only supports THREE.DataTexture3D and THREE.DataTexture2DArray.");
      return;
    }
    _gl.pixelStorei(37440, dstTexture.flipY);
    _gl.pixelStorei(37441, dstTexture.premultiplyAlpha);
    _gl.pixelStorei(3317, dstTexture.unpackAlignment);
    const unpackRowLen = _gl.getParameter(3314);
    const unpackImageHeight = _gl.getParameter(32878);
    const unpackSkipPixels = _gl.getParameter(3316);
    const unpackSkipRows = _gl.getParameter(3315);
    const unpackSkipImages = _gl.getParameter(32877);
    const image = srcTexture.isCompressedTexture ? srcTexture.mipmaps[0] : srcTexture.image;
    _gl.pixelStorei(3314, image.width);
    _gl.pixelStorei(32878, image.height);
    _gl.pixelStorei(3316, sourceBox.min.x);
    _gl.pixelStorei(3315, sourceBox.min.y);
    _gl.pixelStorei(32877, sourceBox.min.z);
    if (srcTexture.isDataTexture || srcTexture.isDataTexture3D) {
      _gl.texSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, glType, image.data);
    } else {
      if (srcTexture.isCompressedTexture) {
        console.warn("THREE.WebGLRenderer.copyTextureToTexture3D: untested support for compressed srcTexture.");
        _gl.compressedTexSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, image.data);
      } else {
        _gl.texSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, glType, image);
      }
    }
    _gl.pixelStorei(3314, unpackRowLen);
    _gl.pixelStorei(32878, unpackImageHeight);
    _gl.pixelStorei(3316, unpackSkipPixels);
    _gl.pixelStorei(3315, unpackSkipRows);
    _gl.pixelStorei(32877, unpackSkipImages);
    if (level === 0 && dstTexture.generateMipmaps)
      _gl.generateMipmap(glTarget);
    state.unbindTexture();
  };
  this.initTexture = function(texture) {
    textures.setTexture2D(texture, 0);
    state.unbindTexture();
  };
  this.resetState = function() {
    _currentActiveCubeFace = 0;
    _currentActiveMipmapLevel = 0;
    _currentRenderTarget = null;
    state.reset();
    bindingStates.reset();
  };
  if (typeof __THREE_DEVTOOLS__ !== "undefined") {
    __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("observe", {detail: this}));
  }
}
WebGLRenderer.prototype.isWebGLRenderer = true;
class WebGL1Renderer extends WebGLRenderer {
}
WebGL1Renderer.prototype.isWebGL1Renderer = true;
class Scene extends Object3D {
  constructor() {
    super();
    this.type = "Scene";
    this.background = null;
    this.environment = null;
    this.fog = null;
    this.overrideMaterial = null;
    this.autoUpdate = true;
    if (typeof __THREE_DEVTOOLS__ !== "undefined") {
      __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("observe", {detail: this}));
    }
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    if (source.background !== null)
      this.background = source.background.clone();
    if (source.environment !== null)
      this.environment = source.environment.clone();
    if (source.fog !== null)
      this.fog = source.fog.clone();
    if (source.overrideMaterial !== null)
      this.overrideMaterial = source.overrideMaterial.clone();
    this.autoUpdate = source.autoUpdate;
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    if (this.fog !== null)
      data.object.fog = this.fog.toJSON();
    return data;
  }
}
Scene.prototype.isScene = true;
class InterleavedBuffer {
  constructor(array, stride) {
    this.array = array;
    this.stride = stride;
    this.count = array !== void 0 ? array.length / stride : 0;
    this.usage = StaticDrawUsage;
    this.updateRange = {offset: 0, count: -1};
    this.version = 0;
    this.uuid = generateUUID();
  }
  onUploadCallback() {
  }
  set needsUpdate(value) {
    if (value === true)
      this.version++;
  }
  setUsage(value) {
    this.usage = value;
    return this;
  }
  copy(source) {
    this.array = new source.array.constructor(source.array);
    this.count = source.count;
    this.stride = source.stride;
    this.usage = source.usage;
    return this;
  }
  copyAt(index1, attribute, index2) {
    index1 *= this.stride;
    index2 *= attribute.stride;
    for (let i = 0, l = this.stride; i < l; i++) {
      this.array[index1 + i] = attribute.array[index2 + i];
    }
    return this;
  }
  set(value, offset = 0) {
    this.array.set(value, offset);
    return this;
  }
  clone(data) {
    if (data.arrayBuffers === void 0) {
      data.arrayBuffers = {};
    }
    if (this.array.buffer._uuid === void 0) {
      this.array.buffer._uuid = generateUUID();
    }
    if (data.arrayBuffers[this.array.buffer._uuid] === void 0) {
      data.arrayBuffers[this.array.buffer._uuid] = this.array.slice(0).buffer;
    }
    const array = new this.array.constructor(data.arrayBuffers[this.array.buffer._uuid]);
    const ib = new this.constructor(array, this.stride);
    ib.setUsage(this.usage);
    return ib;
  }
  onUpload(callback) {
    this.onUploadCallback = callback;
    return this;
  }
  toJSON(data) {
    if (data.arrayBuffers === void 0) {
      data.arrayBuffers = {};
    }
    if (this.array.buffer._uuid === void 0) {
      this.array.buffer._uuid = generateUUID();
    }
    if (data.arrayBuffers[this.array.buffer._uuid] === void 0) {
      data.arrayBuffers[this.array.buffer._uuid] = Array.prototype.slice.call(new Uint32Array(this.array.buffer));
    }
    return {
      uuid: this.uuid,
      buffer: this.array.buffer._uuid,
      type: this.array.constructor.name,
      stride: this.stride
    };
  }
}
InterleavedBuffer.prototype.isInterleavedBuffer = true;
const _vector$6 = /* @__PURE__ */ new Vector3$1();
class InterleavedBufferAttribute {
  constructor(interleavedBuffer, itemSize, offset, normalized = false) {
    this.name = "";
    this.data = interleavedBuffer;
    this.itemSize = itemSize;
    this.offset = offset;
    this.normalized = normalized === true;
  }
  get count() {
    return this.data.count;
  }
  get array() {
    return this.data.array;
  }
  set needsUpdate(value) {
    this.data.needsUpdate = value;
  }
  applyMatrix4(m) {
    for (let i = 0, l = this.data.count; i < l; i++) {
      _vector$6.x = this.getX(i);
      _vector$6.y = this.getY(i);
      _vector$6.z = this.getZ(i);
      _vector$6.applyMatrix4(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  applyNormalMatrix(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$6.x = this.getX(i);
      _vector$6.y = this.getY(i);
      _vector$6.z = this.getZ(i);
      _vector$6.applyNormalMatrix(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  transformDirection(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$6.x = this.getX(i);
      _vector$6.y = this.getY(i);
      _vector$6.z = this.getZ(i);
      _vector$6.transformDirection(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  setX(index, x) {
    this.data.array[index * this.data.stride + this.offset] = x;
    return this;
  }
  setY(index, y) {
    this.data.array[index * this.data.stride + this.offset + 1] = y;
    return this;
  }
  setZ(index, z) {
    this.data.array[index * this.data.stride + this.offset + 2] = z;
    return this;
  }
  setW(index, w) {
    this.data.array[index * this.data.stride + this.offset + 3] = w;
    return this;
  }
  getX(index) {
    return this.data.array[index * this.data.stride + this.offset];
  }
  getY(index) {
    return this.data.array[index * this.data.stride + this.offset + 1];
  }
  getZ(index) {
    return this.data.array[index * this.data.stride + this.offset + 2];
  }
  getW(index) {
    return this.data.array[index * this.data.stride + this.offset + 3];
  }
  setXY(index, x, y) {
    index = index * this.data.stride + this.offset;
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    return this;
  }
  setXYZ(index, x, y, z) {
    index = index * this.data.stride + this.offset;
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    this.data.array[index + 2] = z;
    return this;
  }
  setXYZW(index, x, y, z, w) {
    index = index * this.data.stride + this.offset;
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    this.data.array[index + 2] = z;
    this.data.array[index + 3] = w;
    return this;
  }
  clone(data) {
    if (data === void 0) {
      console.log("THREE.InterleavedBufferAttribute.clone(): Cloning an interlaved buffer attribute will deinterleave buffer data.");
      const array = [];
      for (let i = 0; i < this.count; i++) {
        const index = i * this.data.stride + this.offset;
        for (let j = 0; j < this.itemSize; j++) {
          array.push(this.data.array[index + j]);
        }
      }
      return new BufferAttribute(new this.array.constructor(array), this.itemSize, this.normalized);
    } else {
      if (data.interleavedBuffers === void 0) {
        data.interleavedBuffers = {};
      }
      if (data.interleavedBuffers[this.data.uuid] === void 0) {
        data.interleavedBuffers[this.data.uuid] = this.data.clone(data);
      }
      return new InterleavedBufferAttribute(data.interleavedBuffers[this.data.uuid], this.itemSize, this.offset, this.normalized);
    }
  }
  toJSON(data) {
    if (data === void 0) {
      console.log("THREE.InterleavedBufferAttribute.toJSON(): Serializing an interlaved buffer attribute will deinterleave buffer data.");
      const array = [];
      for (let i = 0; i < this.count; i++) {
        const index = i * this.data.stride + this.offset;
        for (let j = 0; j < this.itemSize; j++) {
          array.push(this.data.array[index + j]);
        }
      }
      return {
        itemSize: this.itemSize,
        type: this.array.constructor.name,
        array,
        normalized: this.normalized
      };
    } else {
      if (data.interleavedBuffers === void 0) {
        data.interleavedBuffers = {};
      }
      if (data.interleavedBuffers[this.data.uuid] === void 0) {
        data.interleavedBuffers[this.data.uuid] = this.data.toJSON(data);
      }
      return {
        isInterleavedBufferAttribute: true,
        itemSize: this.itemSize,
        data: this.data.uuid,
        offset: this.offset,
        normalized: this.normalized
      };
    }
  }
}
InterleavedBufferAttribute.prototype.isInterleavedBufferAttribute = true;
class SpriteMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "SpriteMaterial";
    this.color = new Color(16777215);
    this.map = null;
    this.alphaMap = null;
    this.rotation = 0;
    this.sizeAttenuation = true;
    this.transparent = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.rotation = source.rotation;
    this.sizeAttenuation = source.sizeAttenuation;
    return this;
  }
}
SpriteMaterial.prototype.isSpriteMaterial = true;
let _geometry;
const _intersectPoint = /* @__PURE__ */ new Vector3$1();
const _worldScale = /* @__PURE__ */ new Vector3$1();
const _mvPosition = /* @__PURE__ */ new Vector3$1();
const _alignedPosition = /* @__PURE__ */ new Vector2$1();
const _rotatedPosition = /* @__PURE__ */ new Vector2$1();
const _viewWorldMatrix = /* @__PURE__ */ new Matrix4$1();
const _vA = /* @__PURE__ */ new Vector3$1();
const _vB = /* @__PURE__ */ new Vector3$1();
const _vC = /* @__PURE__ */ new Vector3$1();
const _uvA = /* @__PURE__ */ new Vector2$1();
const _uvB = /* @__PURE__ */ new Vector2$1();
const _uvC = /* @__PURE__ */ new Vector2$1();
class Sprite extends Object3D {
  constructor(material) {
    super();
    this.type = "Sprite";
    if (_geometry === void 0) {
      _geometry = new BufferGeometry();
      const float32Array = new Float32Array([
        -0.5,
        -0.5,
        0,
        0,
        0,
        0.5,
        -0.5,
        0,
        1,
        0,
        0.5,
        0.5,
        0,
        1,
        1,
        -0.5,
        0.5,
        0,
        0,
        1
      ]);
      const interleavedBuffer = new InterleavedBuffer(float32Array, 5);
      _geometry.setIndex([0, 1, 2, 0, 2, 3]);
      _geometry.setAttribute("position", new InterleavedBufferAttribute(interleavedBuffer, 3, 0, false));
      _geometry.setAttribute("uv", new InterleavedBufferAttribute(interleavedBuffer, 2, 3, false));
    }
    this.geometry = _geometry;
    this.material = material !== void 0 ? material : new SpriteMaterial();
    this.center = new Vector2$1(0.5, 0.5);
  }
  raycast(raycaster, intersects2) {
    if (raycaster.camera === null) {
      console.error('THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.');
    }
    _worldScale.setFromMatrixScale(this.matrixWorld);
    _viewWorldMatrix.copy(raycaster.camera.matrixWorld);
    this.modelViewMatrix.multiplyMatrices(raycaster.camera.matrixWorldInverse, this.matrixWorld);
    _mvPosition.setFromMatrixPosition(this.modelViewMatrix);
    if (raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false) {
      _worldScale.multiplyScalar(-_mvPosition.z);
    }
    const rotation = this.material.rotation;
    let sin, cos;
    if (rotation !== 0) {
      cos = Math.cos(rotation);
      sin = Math.sin(rotation);
    }
    const center = this.center;
    transformVertex(_vA.set(-0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    transformVertex(_vB.set(0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    transformVertex(_vC.set(0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    _uvA.set(0, 0);
    _uvB.set(1, 0);
    _uvC.set(1, 1);
    let intersect = raycaster.ray.intersectTriangle(_vA, _vB, _vC, false, _intersectPoint);
    if (intersect === null) {
      transformVertex(_vB.set(-0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);
      _uvB.set(0, 1);
      intersect = raycaster.ray.intersectTriangle(_vA, _vC, _vB, false, _intersectPoint);
      if (intersect === null) {
        return;
      }
    }
    const distance = raycaster.ray.origin.distanceTo(_intersectPoint);
    if (distance < raycaster.near || distance > raycaster.far)
      return;
    intersects2.push({
      distance,
      point: _intersectPoint.clone(),
      uv: Triangle.getUV(_intersectPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2$1()),
      face: null,
      object: this
    });
  }
  copy(source) {
    super.copy(source);
    if (source.center !== void 0)
      this.center.copy(source.center);
    this.material = source.material;
    return this;
  }
}
Sprite.prototype.isSprite = true;
function transformVertex(vertexPosition, mvPosition, center, scale, sin, cos) {
  _alignedPosition.subVectors(vertexPosition, center).addScalar(0.5).multiply(scale);
  if (sin !== void 0) {
    _rotatedPosition.x = cos * _alignedPosition.x - sin * _alignedPosition.y;
    _rotatedPosition.y = sin * _alignedPosition.x + cos * _alignedPosition.y;
  } else {
    _rotatedPosition.copy(_alignedPosition);
  }
  vertexPosition.copy(mvPosition);
  vertexPosition.x += _rotatedPosition.x;
  vertexPosition.y += _rotatedPosition.y;
  vertexPosition.applyMatrix4(_viewWorldMatrix);
}
const _basePosition = /* @__PURE__ */ new Vector3$1();
const _skinIndex = /* @__PURE__ */ new Vector4$1();
const _skinWeight = /* @__PURE__ */ new Vector4$1();
const _vector$5 = /* @__PURE__ */ new Vector3$1();
const _matrix = /* @__PURE__ */ new Matrix4$1();
class SkinnedMesh extends Mesh {
  constructor(geometry, material) {
    super(geometry, material);
    this.type = "SkinnedMesh";
    this.bindMode = "attached";
    this.bindMatrix = new Matrix4$1();
    this.bindMatrixInverse = new Matrix4$1();
  }
  copy(source) {
    super.copy(source);
    this.bindMode = source.bindMode;
    this.bindMatrix.copy(source.bindMatrix);
    this.bindMatrixInverse.copy(source.bindMatrixInverse);
    this.skeleton = source.skeleton;
    return this;
  }
  bind(skeleton, bindMatrix) {
    this.skeleton = skeleton;
    if (bindMatrix === void 0) {
      this.updateMatrixWorld(true);
      this.skeleton.calculateInverses();
      bindMatrix = this.matrixWorld;
    }
    this.bindMatrix.copy(bindMatrix);
    this.bindMatrixInverse.copy(bindMatrix).invert();
  }
  pose() {
    this.skeleton.pose();
  }
  normalizeSkinWeights() {
    const vector = new Vector4$1();
    const skinWeight = this.geometry.attributes.skinWeight;
    for (let i = 0, l = skinWeight.count; i < l; i++) {
      vector.x = skinWeight.getX(i);
      vector.y = skinWeight.getY(i);
      vector.z = skinWeight.getZ(i);
      vector.w = skinWeight.getW(i);
      const scale = 1 / vector.manhattanLength();
      if (scale !== Infinity) {
        vector.multiplyScalar(scale);
      } else {
        vector.set(1, 0, 0, 0);
      }
      skinWeight.setXYZW(i, vector.x, vector.y, vector.z, vector.w);
    }
  }
  updateMatrixWorld(force) {
    super.updateMatrixWorld(force);
    if (this.bindMode === "attached") {
      this.bindMatrixInverse.copy(this.matrixWorld).invert();
    } else if (this.bindMode === "detached") {
      this.bindMatrixInverse.copy(this.bindMatrix).invert();
    } else {
      console.warn("THREE.SkinnedMesh: Unrecognized bindMode: " + this.bindMode);
    }
  }
  boneTransform(index, target) {
    const skeleton = this.skeleton;
    const geometry = this.geometry;
    _skinIndex.fromBufferAttribute(geometry.attributes.skinIndex, index);
    _skinWeight.fromBufferAttribute(geometry.attributes.skinWeight, index);
    _basePosition.copy(target).applyMatrix4(this.bindMatrix);
    target.set(0, 0, 0);
    for (let i = 0; i < 4; i++) {
      const weight = _skinWeight.getComponent(i);
      if (weight !== 0) {
        const boneIndex = _skinIndex.getComponent(i);
        _matrix.multiplyMatrices(skeleton.bones[boneIndex].matrixWorld, skeleton.boneInverses[boneIndex]);
        target.addScaledVector(_vector$5.copy(_basePosition).applyMatrix4(_matrix), weight);
      }
    }
    return target.applyMatrix4(this.bindMatrixInverse);
  }
}
SkinnedMesh.prototype.isSkinnedMesh = true;
class Bone extends Object3D {
  constructor() {
    super();
    this.type = "Bone";
  }
}
Bone.prototype.isBone = true;
class DataTexture extends Texture {
  constructor(data = null, width = 1, height = 1, format, type, mapping, wrapS, wrapT, magFilter = NearestFilter, minFilter = NearestFilter, anisotropy, encoding) {
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
    this.image = {data, width, height};
    this.magFilter = magFilter;
    this.minFilter = minFilter;
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
  }
}
DataTexture.prototype.isDataTexture = true;
const _offsetMatrix = /* @__PURE__ */ new Matrix4$1();
const _identityMatrix = /* @__PURE__ */ new Matrix4$1();
class Skeleton {
  constructor(bones = [], boneInverses = []) {
    this.uuid = generateUUID();
    this.bones = bones.slice(0);
    this.boneInverses = boneInverses;
    this.boneMatrices = null;
    this.boneTexture = null;
    this.boneTextureSize = 0;
    this.frame = -1;
    this.init();
  }
  init() {
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    this.boneMatrices = new Float32Array(bones.length * 16);
    if (boneInverses.length === 0) {
      this.calculateInverses();
    } else {
      if (bones.length !== boneInverses.length) {
        console.warn("THREE.Skeleton: Number of inverse bone matrices does not match amount of bones.");
        this.boneInverses = [];
        for (let i = 0, il = this.bones.length; i < il; i++) {
          this.boneInverses.push(new Matrix4$1());
        }
      }
    }
  }
  calculateInverses() {
    this.boneInverses.length = 0;
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const inverse = new Matrix4$1();
      if (this.bones[i]) {
        inverse.copy(this.bones[i].matrixWorld).invert();
      }
      this.boneInverses.push(inverse);
    }
  }
  pose() {
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone) {
        bone.matrixWorld.copy(this.boneInverses[i]).invert();
      }
    }
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone) {
        if (bone.parent && bone.parent.isBone) {
          bone.matrix.copy(bone.parent.matrixWorld).invert();
          bone.matrix.multiply(bone.matrixWorld);
        } else {
          bone.matrix.copy(bone.matrixWorld);
        }
        bone.matrix.decompose(bone.position, bone.quaternion, bone.scale);
      }
    }
  }
  update() {
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    const boneMatrices = this.boneMatrices;
    const boneTexture = this.boneTexture;
    for (let i = 0, il = bones.length; i < il; i++) {
      const matrix = bones[i] ? bones[i].matrixWorld : _identityMatrix;
      _offsetMatrix.multiplyMatrices(matrix, boneInverses[i]);
      _offsetMatrix.toArray(boneMatrices, i * 16);
    }
    if (boneTexture !== null) {
      boneTexture.needsUpdate = true;
    }
  }
  clone() {
    return new Skeleton(this.bones, this.boneInverses);
  }
  computeBoneTexture() {
    let size = Math.sqrt(this.bones.length * 4);
    size = ceilPowerOfTwo(size);
    size = Math.max(size, 4);
    const boneMatrices = new Float32Array(size * size * 4);
    boneMatrices.set(this.boneMatrices);
    const boneTexture = new DataTexture(boneMatrices, size, size, RGBAFormat, FloatType);
    boneTexture.needsUpdate = true;
    this.boneMatrices = boneMatrices;
    this.boneTexture = boneTexture;
    this.boneTextureSize = size;
    return this;
  }
  getBoneByName(name) {
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone.name === name) {
        return bone;
      }
    }
    return void 0;
  }
  dispose() {
    if (this.boneTexture !== null) {
      this.boneTexture.dispose();
      this.boneTexture = null;
    }
  }
  fromJSON(json, bones) {
    this.uuid = json.uuid;
    for (let i = 0, l = json.bones.length; i < l; i++) {
      const uuid = json.bones[i];
      let bone = bones[uuid];
      if (bone === void 0) {
        console.warn("THREE.Skeleton: No bone found with UUID:", uuid);
        bone = new Bone();
      }
      this.bones.push(bone);
      this.boneInverses.push(new Matrix4$1().fromArray(json.boneInverses[i]));
    }
    this.init();
    return this;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.5,
        type: "Skeleton",
        generator: "Skeleton.toJSON"
      },
      bones: [],
      boneInverses: []
    };
    data.uuid = this.uuid;
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    for (let i = 0, l = bones.length; i < l; i++) {
      const bone = bones[i];
      data.bones.push(bone.uuid);
      const boneInverse = boneInverses[i];
      data.boneInverses.push(boneInverse.toArray());
    }
    return data;
  }
}
class InstancedBufferAttribute extends BufferAttribute {
  constructor(array, itemSize, normalized, meshPerAttribute = 1) {
    if (typeof normalized === "number") {
      meshPerAttribute = normalized;
      normalized = false;
      console.error("THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.");
    }
    super(array, itemSize, normalized);
    this.meshPerAttribute = meshPerAttribute;
  }
  copy(source) {
    super.copy(source);
    this.meshPerAttribute = source.meshPerAttribute;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.meshPerAttribute = this.meshPerAttribute;
    data.isInstancedBufferAttribute = true;
    return data;
  }
}
InstancedBufferAttribute.prototype.isInstancedBufferAttribute = true;
const _instanceLocalMatrix = /* @__PURE__ */ new Matrix4$1();
const _instanceWorldMatrix = /* @__PURE__ */ new Matrix4$1();
const _instanceIntersects = [];
const _mesh = /* @__PURE__ */ new Mesh();
class InstancedMesh extends Mesh {
  constructor(geometry, material, count) {
    super(geometry, material);
    this.instanceMatrix = new InstancedBufferAttribute(new Float32Array(count * 16), 16);
    this.instanceColor = null;
    this.count = count;
    this.frustumCulled = false;
  }
  copy(source) {
    super.copy(source);
    this.instanceMatrix.copy(source.instanceMatrix);
    if (source.instanceColor !== null)
      this.instanceColor = source.instanceColor.clone();
    this.count = source.count;
    return this;
  }
  getColorAt(index, color) {
    color.fromArray(this.instanceColor.array, index * 3);
  }
  getMatrixAt(index, matrix) {
    matrix.fromArray(this.instanceMatrix.array, index * 16);
  }
  raycast(raycaster, intersects2) {
    const matrixWorld = this.matrixWorld;
    const raycastTimes = this.count;
    _mesh.geometry = this.geometry;
    _mesh.material = this.material;
    if (_mesh.material === void 0)
      return;
    for (let instanceId = 0; instanceId < raycastTimes; instanceId++) {
      this.getMatrixAt(instanceId, _instanceLocalMatrix);
      _instanceWorldMatrix.multiplyMatrices(matrixWorld, _instanceLocalMatrix);
      _mesh.matrixWorld = _instanceWorldMatrix;
      _mesh.raycast(raycaster, _instanceIntersects);
      for (let i = 0, l = _instanceIntersects.length; i < l; i++) {
        const intersect = _instanceIntersects[i];
        intersect.instanceId = instanceId;
        intersect.object = this;
        intersects2.push(intersect);
      }
      _instanceIntersects.length = 0;
    }
  }
  setColorAt(index, color) {
    if (this.instanceColor === null) {
      this.instanceColor = new InstancedBufferAttribute(new Float32Array(this.instanceMatrix.count * 3), 3);
    }
    color.toArray(this.instanceColor.array, index * 3);
  }
  setMatrixAt(index, matrix) {
    matrix.toArray(this.instanceMatrix.array, index * 16);
  }
  updateMorphTargets() {
  }
  dispose() {
    this.dispatchEvent({type: "dispose"});
  }
}
InstancedMesh.prototype.isInstancedMesh = true;
class LineBasicMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "LineBasicMaterial";
    this.color = new Color(16777215);
    this.linewidth = 1;
    this.linecap = "round";
    this.linejoin = "round";
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.linewidth = source.linewidth;
    this.linecap = source.linecap;
    this.linejoin = source.linejoin;
    return this;
  }
}
LineBasicMaterial.prototype.isLineBasicMaterial = true;
const _start$1 = /* @__PURE__ */ new Vector3$1();
const _end$1 = /* @__PURE__ */ new Vector3$1();
const _inverseMatrix$1 = /* @__PURE__ */ new Matrix4$1();
const _ray$1 = /* @__PURE__ */ new Ray();
const _sphere$1 = /* @__PURE__ */ new Sphere();
class Line extends Object3D {
  constructor(geometry = new BufferGeometry(), material = new LineBasicMaterial()) {
    super();
    this.type = "Line";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source) {
    super.copy(source);
    this.material = source.material;
    this.geometry = source.geometry;
    return this;
  }
  computeLineDistances() {
    const geometry = this.geometry;
    if (geometry.isBufferGeometry) {
      if (geometry.index === null) {
        const positionAttribute = geometry.attributes.position;
        const lineDistances = [0];
        for (let i = 1, l = positionAttribute.count; i < l; i++) {
          _start$1.fromBufferAttribute(positionAttribute, i - 1);
          _end$1.fromBufferAttribute(positionAttribute, i);
          lineDistances[i] = lineDistances[i - 1];
          lineDistances[i] += _start$1.distanceTo(_end$1);
        }
        geometry.setAttribute("lineDistance", new Float32BufferAttribute(lineDistances, 1));
      } else {
        console.warn("THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.");
      }
    } else if (geometry.isGeometry) {
      console.error("THREE.Line.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
    }
    return this;
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const matrixWorld = this.matrixWorld;
    const threshold = raycaster.params.Line.threshold;
    const drawRange = geometry.drawRange;
    if (geometry.boundingSphere === null)
      geometry.computeBoundingSphere();
    _sphere$1.copy(geometry.boundingSphere);
    _sphere$1.applyMatrix4(matrixWorld);
    _sphere$1.radius += threshold;
    if (raycaster.ray.intersectsSphere(_sphere$1) === false)
      return;
    _inverseMatrix$1.copy(matrixWorld).invert();
    _ray$1.copy(raycaster.ray).applyMatrix4(_inverseMatrix$1);
    const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
    const localThresholdSq = localThreshold * localThreshold;
    const vStart = new Vector3$1();
    const vEnd = new Vector3$1();
    const interSegment = new Vector3$1();
    const interRay = new Vector3$1();
    const step = this.isLineSegments ? 2 : 1;
    if (geometry.isBufferGeometry) {
      const index = geometry.index;
      const attributes = geometry.attributes;
      const positionAttribute = attributes.position;
      if (index !== null) {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(index.count, drawRange.start + drawRange.count);
        for (let i = start, l = end - 1; i < l; i += step) {
          const a = index.getX(i);
          const b = index.getX(i + 1);
          vStart.fromBufferAttribute(positionAttribute, a);
          vEnd.fromBufferAttribute(positionAttribute, b);
          const distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);
          if (distSq > localThresholdSq)
            continue;
          interRay.applyMatrix4(this.matrixWorld);
          const distance = raycaster.ray.origin.distanceTo(interRay);
          if (distance < raycaster.near || distance > raycaster.far)
            continue;
          intersects2.push({
            distance,
            point: interSegment.clone().applyMatrix4(this.matrixWorld),
            index: i,
            face: null,
            faceIndex: null,
            object: this
          });
        }
      } else {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);
        for (let i = start, l = end - 1; i < l; i += step) {
          vStart.fromBufferAttribute(positionAttribute, i);
          vEnd.fromBufferAttribute(positionAttribute, i + 1);
          const distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);
          if (distSq > localThresholdSq)
            continue;
          interRay.applyMatrix4(this.matrixWorld);
          const distance = raycaster.ray.origin.distanceTo(interRay);
          if (distance < raycaster.near || distance > raycaster.far)
            continue;
          intersects2.push({
            distance,
            point: interSegment.clone().applyMatrix4(this.matrixWorld),
            index: i,
            face: null,
            faceIndex: null,
            object: this
          });
        }
      }
    } else if (geometry.isGeometry) {
      console.error("THREE.Line.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
    }
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    if (geometry.isBufferGeometry) {
      const morphAttributes = geometry.morphAttributes;
      const keys = Object.keys(morphAttributes);
      if (keys.length > 0) {
        const morphAttribute = morphAttributes[keys[0]];
        if (morphAttribute !== void 0) {
          this.morphTargetInfluences = [];
          this.morphTargetDictionary = {};
          for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
            const name = morphAttribute[m].name || String(m);
            this.morphTargetInfluences.push(0);
            this.morphTargetDictionary[name] = m;
          }
        }
      }
    } else {
      const morphTargets = geometry.morphTargets;
      if (morphTargets !== void 0 && morphTargets.length > 0) {
        console.error("THREE.Line.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.");
      }
    }
  }
}
Line.prototype.isLine = true;
const _start = /* @__PURE__ */ new Vector3$1();
const _end = /* @__PURE__ */ new Vector3$1();
class LineSegments extends Line {
  constructor(geometry, material) {
    super(geometry, material);
    this.type = "LineSegments";
  }
  computeLineDistances() {
    const geometry = this.geometry;
    if (geometry.isBufferGeometry) {
      if (geometry.index === null) {
        const positionAttribute = geometry.attributes.position;
        const lineDistances = [];
        for (let i = 0, l = positionAttribute.count; i < l; i += 2) {
          _start.fromBufferAttribute(positionAttribute, i);
          _end.fromBufferAttribute(positionAttribute, i + 1);
          lineDistances[i] = i === 0 ? 0 : lineDistances[i - 1];
          lineDistances[i + 1] = lineDistances[i] + _start.distanceTo(_end);
        }
        geometry.setAttribute("lineDistance", new Float32BufferAttribute(lineDistances, 1));
      } else {
        console.warn("THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.");
      }
    } else if (geometry.isGeometry) {
      console.error("THREE.LineSegments.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
    }
    return this;
  }
}
LineSegments.prototype.isLineSegments = true;
class LineLoop extends Line {
  constructor(geometry, material) {
    super(geometry, material);
    this.type = "LineLoop";
  }
}
LineLoop.prototype.isLineLoop = true;
class PointsMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "PointsMaterial";
    this.color = new Color(16777215);
    this.map = null;
    this.alphaMap = null;
    this.size = 1;
    this.sizeAttenuation = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.size = source.size;
    this.sizeAttenuation = source.sizeAttenuation;
    return this;
  }
}
PointsMaterial.prototype.isPointsMaterial = true;
const _inverseMatrix = /* @__PURE__ */ new Matrix4$1();
const _ray = /* @__PURE__ */ new Ray();
const _sphere = /* @__PURE__ */ new Sphere();
const _position$2 = /* @__PURE__ */ new Vector3$1();
class Points extends Object3D {
  constructor(geometry = new BufferGeometry(), material = new PointsMaterial()) {
    super();
    this.type = "Points";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source) {
    super.copy(source);
    this.material = source.material;
    this.geometry = source.geometry;
    return this;
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const matrixWorld = this.matrixWorld;
    const threshold = raycaster.params.Points.threshold;
    const drawRange = geometry.drawRange;
    if (geometry.boundingSphere === null)
      geometry.computeBoundingSphere();
    _sphere.copy(geometry.boundingSphere);
    _sphere.applyMatrix4(matrixWorld);
    _sphere.radius += threshold;
    if (raycaster.ray.intersectsSphere(_sphere) === false)
      return;
    _inverseMatrix.copy(matrixWorld).invert();
    _ray.copy(raycaster.ray).applyMatrix4(_inverseMatrix);
    const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
    const localThresholdSq = localThreshold * localThreshold;
    if (geometry.isBufferGeometry) {
      const index = geometry.index;
      const attributes = geometry.attributes;
      const positionAttribute = attributes.position;
      if (index !== null) {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(index.count, drawRange.start + drawRange.count);
        for (let i = start, il = end; i < il; i++) {
          const a = index.getX(i);
          _position$2.fromBufferAttribute(positionAttribute, a);
          testPoint(_position$2, a, localThresholdSq, matrixWorld, raycaster, intersects2, this);
        }
      } else {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);
        for (let i = start, l = end; i < l; i++) {
          _position$2.fromBufferAttribute(positionAttribute, i);
          testPoint(_position$2, i, localThresholdSq, matrixWorld, raycaster, intersects2, this);
        }
      }
    } else {
      console.error("THREE.Points.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.");
    }
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    if (geometry.isBufferGeometry) {
      const morphAttributes = geometry.morphAttributes;
      const keys = Object.keys(morphAttributes);
      if (keys.length > 0) {
        const morphAttribute = morphAttributes[keys[0]];
        if (morphAttribute !== void 0) {
          this.morphTargetInfluences = [];
          this.morphTargetDictionary = {};
          for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
            const name = morphAttribute[m].name || String(m);
            this.morphTargetInfluences.push(0);
            this.morphTargetDictionary[name] = m;
          }
        }
      }
    } else {
      const morphTargets = geometry.morphTargets;
      if (morphTargets !== void 0 && morphTargets.length > 0) {
        console.error("THREE.Points.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.");
      }
    }
  }
}
Points.prototype.isPoints = true;
function testPoint(point, index, localThresholdSq, matrixWorld, raycaster, intersects2, object) {
  const rayPointDistanceSq = _ray.distanceSqToPoint(point);
  if (rayPointDistanceSq < localThresholdSq) {
    const intersectPoint = new Vector3$1();
    _ray.closestPointToPoint(point, intersectPoint);
    intersectPoint.applyMatrix4(matrixWorld);
    const distance = raycaster.ray.origin.distanceTo(intersectPoint);
    if (distance < raycaster.near || distance > raycaster.far)
      return;
    intersects2.push({
      distance,
      distanceToRay: Math.sqrt(rayPointDistanceSq),
      point: intersectPoint,
      index,
      face: null,
      object
    });
  }
}
class VideoTexture extends Texture {
  constructor(video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
    super(video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
    this.minFilter = minFilter !== void 0 ? minFilter : LinearFilter;
    this.magFilter = magFilter !== void 0 ? magFilter : LinearFilter;
    this.generateMipmaps = false;
    const scope = this;
    function updateVideo() {
      scope.needsUpdate = true;
      video.requestVideoFrameCallback(updateVideo);
    }
    if ("requestVideoFrameCallback" in video) {
      video.requestVideoFrameCallback(updateVideo);
    }
  }
  clone() {
    return new this.constructor(this.image).copy(this);
  }
  update() {
    const video = this.image;
    const hasVideoFrameCallback = "requestVideoFrameCallback" in video;
    if (hasVideoFrameCallback === false && video.readyState >= video.HAVE_CURRENT_DATA) {
      this.needsUpdate = true;
    }
  }
}
VideoTexture.prototype.isVideoTexture = true;
class FramebufferTexture extends Texture {
  constructor(width, height, format) {
    super({width, height});
    this.format = format;
    this.magFilter = NearestFilter;
    this.minFilter = NearestFilter;
    this.generateMipmaps = false;
    this.needsUpdate = true;
  }
}
FramebufferTexture.prototype.isFramebufferTexture = true;
class CompressedTexture extends Texture {
  constructor(mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding) {
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
    this.image = {width, height};
    this.mipmaps = mipmaps;
    this.flipY = false;
    this.generateMipmaps = false;
  }
}
CompressedTexture.prototype.isCompressedTexture = true;
class CanvasTexture extends Texture {
  constructor(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
    super(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
    this.needsUpdate = true;
  }
}
CanvasTexture.prototype.isCanvasTexture = true;
class CylinderGeometry extends BufferGeometry {
  constructor(radiusTop = 1, radiusBottom = 1, height = 1, radialSegments = 8, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2) {
    super();
    this.type = "CylinderGeometry";
    this.parameters = {
      radiusTop,
      radiusBottom,
      height,
      radialSegments,
      heightSegments,
      openEnded,
      thetaStart,
      thetaLength
    };
    const scope = this;
    radialSegments = Math.floor(radialSegments);
    heightSegments = Math.floor(heightSegments);
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    let index = 0;
    const indexArray = [];
    const halfHeight = height / 2;
    let groupStart = 0;
    generateTorso();
    if (openEnded === false) {
      if (radiusTop > 0)
        generateCap(true);
      if (radiusBottom > 0)
        generateCap(false);
    }
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
    function generateTorso() {
      const normal = new Vector3$1();
      const vertex2 = new Vector3$1();
      let groupCount = 0;
      const slope = (radiusBottom - radiusTop) / height;
      for (let y = 0; y <= heightSegments; y++) {
        const indexRow = [];
        const v = y / heightSegments;
        const radius = v * (radiusBottom - radiusTop) + radiusTop;
        for (let x = 0; x <= radialSegments; x++) {
          const u = x / radialSegments;
          const theta = u * thetaLength + thetaStart;
          const sinTheta = Math.sin(theta);
          const cosTheta = Math.cos(theta);
          vertex2.x = radius * sinTheta;
          vertex2.y = -v * height + halfHeight;
          vertex2.z = radius * cosTheta;
          vertices.push(vertex2.x, vertex2.y, vertex2.z);
          normal.set(sinTheta, slope, cosTheta).normalize();
          normals.push(normal.x, normal.y, normal.z);
          uvs.push(u, 1 - v);
          indexRow.push(index++);
        }
        indexArray.push(indexRow);
      }
      for (let x = 0; x < radialSegments; x++) {
        for (let y = 0; y < heightSegments; y++) {
          const a = indexArray[y][x];
          const b = indexArray[y + 1][x];
          const c = indexArray[y + 1][x + 1];
          const d = indexArray[y][x + 1];
          indices.push(a, b, d);
          indices.push(b, c, d);
          groupCount += 6;
        }
      }
      scope.addGroup(groupStart, groupCount, 0);
      groupStart += groupCount;
    }
    function generateCap(top) {
      const centerIndexStart = index;
      const uv = new Vector2$1();
      const vertex2 = new Vector3$1();
      let groupCount = 0;
      const radius = top === true ? radiusTop : radiusBottom;
      const sign2 = top === true ? 1 : -1;
      for (let x = 1; x <= radialSegments; x++) {
        vertices.push(0, halfHeight * sign2, 0);
        normals.push(0, sign2, 0);
        uvs.push(0.5, 0.5);
        index++;
      }
      const centerIndexEnd = index;
      for (let x = 0; x <= radialSegments; x++) {
        const u = x / radialSegments;
        const theta = u * thetaLength + thetaStart;
        const cosTheta = Math.cos(theta);
        const sinTheta = Math.sin(theta);
        vertex2.x = radius * sinTheta;
        vertex2.y = halfHeight * sign2;
        vertex2.z = radius * cosTheta;
        vertices.push(vertex2.x, vertex2.y, vertex2.z);
        normals.push(0, sign2, 0);
        uv.x = cosTheta * 0.5 + 0.5;
        uv.y = sinTheta * 0.5 * sign2 + 0.5;
        uvs.push(uv.x, uv.y);
        index++;
      }
      for (let x = 0; x < radialSegments; x++) {
        const c = centerIndexStart + x;
        const i = centerIndexEnd + x;
        if (top === true) {
          indices.push(i, i + 1, c);
        } else {
          indices.push(i + 1, i, c);
        }
        groupCount += 3;
      }
      scope.addGroup(groupStart, groupCount, top === true ? 1 : 2);
      groupStart += groupCount;
    }
  }
  static fromJSON(data) {
    return new CylinderGeometry(data.radiusTop, data.radiusBottom, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
  }
}
const _v0 = new Vector3$1();
const _v1$1 = new Vector3$1();
const _normal = new Vector3$1();
const _triangle = new Triangle();
class EdgesGeometry extends BufferGeometry {
  constructor(geometry = null, thresholdAngle = 1) {
    super();
    this.type = "EdgesGeometry";
    this.parameters = {
      geometry,
      thresholdAngle
    };
    if (geometry !== null) {
      const precisionPoints = 4;
      const precision = Math.pow(10, precisionPoints);
      const thresholdDot = Math.cos(DEG2RAD * thresholdAngle);
      const indexAttr = geometry.getIndex();
      const positionAttr = geometry.getAttribute("position");
      const indexCount = indexAttr ? indexAttr.count : positionAttr.count;
      const indexArr = [0, 0, 0];
      const vertKeys = ["a", "b", "c"];
      const hashes = new Array(3);
      const edgeData = {};
      const vertices = [];
      for (let i = 0; i < indexCount; i += 3) {
        if (indexAttr) {
          indexArr[0] = indexAttr.getX(i);
          indexArr[1] = indexAttr.getX(i + 1);
          indexArr[2] = indexAttr.getX(i + 2);
        } else {
          indexArr[0] = i;
          indexArr[1] = i + 1;
          indexArr[2] = i + 2;
        }
        const {a, b, c} = _triangle;
        a.fromBufferAttribute(positionAttr, indexArr[0]);
        b.fromBufferAttribute(positionAttr, indexArr[1]);
        c.fromBufferAttribute(positionAttr, indexArr[2]);
        _triangle.getNormal(_normal);
        hashes[0] = `${Math.round(a.x * precision)},${Math.round(a.y * precision)},${Math.round(a.z * precision)}`;
        hashes[1] = `${Math.round(b.x * precision)},${Math.round(b.y * precision)},${Math.round(b.z * precision)}`;
        hashes[2] = `${Math.round(c.x * precision)},${Math.round(c.y * precision)},${Math.round(c.z * precision)}`;
        if (hashes[0] === hashes[1] || hashes[1] === hashes[2] || hashes[2] === hashes[0]) {
          continue;
        }
        for (let j = 0; j < 3; j++) {
          const jNext = (j + 1) % 3;
          const vecHash0 = hashes[j];
          const vecHash1 = hashes[jNext];
          const v0 = _triangle[vertKeys[j]];
          const v1 = _triangle[vertKeys[jNext]];
          const hash = `${vecHash0}_${vecHash1}`;
          const reverseHash = `${vecHash1}_${vecHash0}`;
          if (reverseHash in edgeData && edgeData[reverseHash]) {
            if (_normal.dot(edgeData[reverseHash].normal) <= thresholdDot) {
              vertices.push(v0.x, v0.y, v0.z);
              vertices.push(v1.x, v1.y, v1.z);
            }
            edgeData[reverseHash] = null;
          } else if (!(hash in edgeData)) {
            edgeData[hash] = {
              index0: indexArr[j],
              index1: indexArr[jNext],
              normal: _normal.clone()
            };
          }
        }
      }
      for (const key in edgeData) {
        if (edgeData[key]) {
          const {index0, index1} = edgeData[key];
          _v0.fromBufferAttribute(positionAttr, index0);
          _v1$1.fromBufferAttribute(positionAttr, index1);
          vertices.push(_v0.x, _v0.y, _v0.z);
          vertices.push(_v1$1.x, _v1$1.y, _v1$1.z);
        }
      }
      this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    }
  }
}
class Curve {
  constructor() {
    this.type = "Curve";
    this.arcLengthDivisions = 200;
  }
  getPoint() {
    console.warn("THREE.Curve: .getPoint() not implemented.");
    return null;
  }
  getPointAt(u, optionalTarget) {
    const t = this.getUtoTmapping(u);
    return this.getPoint(t, optionalTarget);
  }
  getPoints(divisions = 5) {
    const points = [];
    for (let d = 0; d <= divisions; d++) {
      points.push(this.getPoint(d / divisions));
    }
    return points;
  }
  getSpacedPoints(divisions = 5) {
    const points = [];
    for (let d = 0; d <= divisions; d++) {
      points.push(this.getPointAt(d / divisions));
    }
    return points;
  }
  getLength() {
    const lengths = this.getLengths();
    return lengths[lengths.length - 1];
  }
  getLengths(divisions = this.arcLengthDivisions) {
    if (this.cacheArcLengths && this.cacheArcLengths.length === divisions + 1 && !this.needsUpdate) {
      return this.cacheArcLengths;
    }
    this.needsUpdate = false;
    const cache = [];
    let current, last = this.getPoint(0);
    let sum = 0;
    cache.push(0);
    for (let p = 1; p <= divisions; p++) {
      current = this.getPoint(p / divisions);
      sum += current.distanceTo(last);
      cache.push(sum);
      last = current;
    }
    this.cacheArcLengths = cache;
    return cache;
  }
  updateArcLengths() {
    this.needsUpdate = true;
    this.getLengths();
  }
  getUtoTmapping(u, distance) {
    const arcLengths = this.getLengths();
    let i = 0;
    const il = arcLengths.length;
    let targetArcLength;
    if (distance) {
      targetArcLength = distance;
    } else {
      targetArcLength = u * arcLengths[il - 1];
    }
    let low = 0, high = il - 1, comparison;
    while (low <= high) {
      i = Math.floor(low + (high - low) / 2);
      comparison = arcLengths[i] - targetArcLength;
      if (comparison < 0) {
        low = i + 1;
      } else if (comparison > 0) {
        high = i - 1;
      } else {
        high = i;
        break;
      }
    }
    i = high;
    if (arcLengths[i] === targetArcLength) {
      return i / (il - 1);
    }
    const lengthBefore = arcLengths[i];
    const lengthAfter = arcLengths[i + 1];
    const segmentLength = lengthAfter - lengthBefore;
    const segmentFraction = (targetArcLength - lengthBefore) / segmentLength;
    const t = (i + segmentFraction) / (il - 1);
    return t;
  }
  getTangent(t, optionalTarget) {
    const delta = 1e-4;
    let t1 = t - delta;
    let t2 = t + delta;
    if (t1 < 0)
      t1 = 0;
    if (t2 > 1)
      t2 = 1;
    const pt1 = this.getPoint(t1);
    const pt2 = this.getPoint(t2);
    const tangent = optionalTarget || (pt1.isVector2 ? new Vector2$1() : new Vector3$1());
    tangent.copy(pt2).sub(pt1).normalize();
    return tangent;
  }
  getTangentAt(u, optionalTarget) {
    const t = this.getUtoTmapping(u);
    return this.getTangent(t, optionalTarget);
  }
  computeFrenetFrames(segments, closed) {
    const normal = new Vector3$1();
    const tangents = [];
    const normals = [];
    const binormals = [];
    const vec = new Vector3$1();
    const mat = new Matrix4$1();
    for (let i = 0; i <= segments; i++) {
      const u = i / segments;
      tangents[i] = this.getTangentAt(u, new Vector3$1());
    }
    normals[0] = new Vector3$1();
    binormals[0] = new Vector3$1();
    let min = Number.MAX_VALUE;
    const tx = Math.abs(tangents[0].x);
    const ty = Math.abs(tangents[0].y);
    const tz = Math.abs(tangents[0].z);
    if (tx <= min) {
      min = tx;
      normal.set(1, 0, 0);
    }
    if (ty <= min) {
      min = ty;
      normal.set(0, 1, 0);
    }
    if (tz <= min) {
      normal.set(0, 0, 1);
    }
    vec.crossVectors(tangents[0], normal).normalize();
    normals[0].crossVectors(tangents[0], vec);
    binormals[0].crossVectors(tangents[0], normals[0]);
    for (let i = 1; i <= segments; i++) {
      normals[i] = normals[i - 1].clone();
      binormals[i] = binormals[i - 1].clone();
      vec.crossVectors(tangents[i - 1], tangents[i]);
      if (vec.length() > Number.EPSILON) {
        vec.normalize();
        const theta = Math.acos(clamp$2(tangents[i - 1].dot(tangents[i]), -1, 1));
        normals[i].applyMatrix4(mat.makeRotationAxis(vec, theta));
      }
      binormals[i].crossVectors(tangents[i], normals[i]);
    }
    if (closed === true) {
      let theta = Math.acos(clamp$2(normals[0].dot(normals[segments]), -1, 1));
      theta /= segments;
      if (tangents[0].dot(vec.crossVectors(normals[0], normals[segments])) > 0) {
        theta = -theta;
      }
      for (let i = 1; i <= segments; i++) {
        normals[i].applyMatrix4(mat.makeRotationAxis(tangents[i], theta * i));
        binormals[i].crossVectors(tangents[i], normals[i]);
      }
    }
    return {
      tangents,
      normals,
      binormals
    };
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.arcLengthDivisions = source.arcLengthDivisions;
    return this;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.5,
        type: "Curve",
        generator: "Curve.toJSON"
      }
    };
    data.arcLengthDivisions = this.arcLengthDivisions;
    data.type = this.type;
    return data;
  }
  fromJSON(json) {
    this.arcLengthDivisions = json.arcLengthDivisions;
    return this;
  }
}
class EllipseCurve extends Curve {
  constructor(aX = 0, aY = 0, xRadius = 1, yRadius = 1, aStartAngle = 0, aEndAngle = Math.PI * 2, aClockwise = false, aRotation = 0) {
    super();
    this.type = "EllipseCurve";
    this.aX = aX;
    this.aY = aY;
    this.xRadius = xRadius;
    this.yRadius = yRadius;
    this.aStartAngle = aStartAngle;
    this.aEndAngle = aEndAngle;
    this.aClockwise = aClockwise;
    this.aRotation = aRotation;
  }
  getPoint(t, optionalTarget) {
    const point = optionalTarget || new Vector2$1();
    const twoPi = Math.PI * 2;
    let deltaAngle = this.aEndAngle - this.aStartAngle;
    const samePoints = Math.abs(deltaAngle) < Number.EPSILON;
    while (deltaAngle < 0)
      deltaAngle += twoPi;
    while (deltaAngle > twoPi)
      deltaAngle -= twoPi;
    if (deltaAngle < Number.EPSILON) {
      if (samePoints) {
        deltaAngle = 0;
      } else {
        deltaAngle = twoPi;
      }
    }
    if (this.aClockwise === true && !samePoints) {
      if (deltaAngle === twoPi) {
        deltaAngle = -twoPi;
      } else {
        deltaAngle = deltaAngle - twoPi;
      }
    }
    const angle = this.aStartAngle + t * deltaAngle;
    let x = this.aX + this.xRadius * Math.cos(angle);
    let y = this.aY + this.yRadius * Math.sin(angle);
    if (this.aRotation !== 0) {
      const cos = Math.cos(this.aRotation);
      const sin = Math.sin(this.aRotation);
      const tx = x - this.aX;
      const ty = y - this.aY;
      x = tx * cos - ty * sin + this.aX;
      y = tx * sin + ty * cos + this.aY;
    }
    return point.set(x, y);
  }
  copy(source) {
    super.copy(source);
    this.aX = source.aX;
    this.aY = source.aY;
    this.xRadius = source.xRadius;
    this.yRadius = source.yRadius;
    this.aStartAngle = source.aStartAngle;
    this.aEndAngle = source.aEndAngle;
    this.aClockwise = source.aClockwise;
    this.aRotation = source.aRotation;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.aX = this.aX;
    data.aY = this.aY;
    data.xRadius = this.xRadius;
    data.yRadius = this.yRadius;
    data.aStartAngle = this.aStartAngle;
    data.aEndAngle = this.aEndAngle;
    data.aClockwise = this.aClockwise;
    data.aRotation = this.aRotation;
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.aX = json.aX;
    this.aY = json.aY;
    this.xRadius = json.xRadius;
    this.yRadius = json.yRadius;
    this.aStartAngle = json.aStartAngle;
    this.aEndAngle = json.aEndAngle;
    this.aClockwise = json.aClockwise;
    this.aRotation = json.aRotation;
    return this;
  }
}
EllipseCurve.prototype.isEllipseCurve = true;
class ArcCurve extends EllipseCurve {
  constructor(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
    super(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
    this.type = "ArcCurve";
  }
}
ArcCurve.prototype.isArcCurve = true;
function CubicPoly() {
  let c0 = 0, c1 = 0, c2 = 0, c3 = 0;
  function init(x0, x1, t0, t1) {
    c0 = x0;
    c1 = t0;
    c2 = -3 * x0 + 3 * x1 - 2 * t0 - t1;
    c3 = 2 * x0 - 2 * x1 + t0 + t1;
  }
  return {
    initCatmullRom: function(x0, x1, x2, x3, tension) {
      init(x1, x2, tension * (x2 - x0), tension * (x3 - x1));
    },
    initNonuniformCatmullRom: function(x0, x1, x2, x3, dt0, dt1, dt2) {
      let t1 = (x1 - x0) / dt0 - (x2 - x0) / (dt0 + dt1) + (x2 - x1) / dt1;
      let t2 = (x2 - x1) / dt1 - (x3 - x1) / (dt1 + dt2) + (x3 - x2) / dt2;
      t1 *= dt1;
      t2 *= dt1;
      init(x1, x2, t1, t2);
    },
    calc: function(t) {
      const t2 = t * t;
      const t3 = t2 * t;
      return c0 + c1 * t + c2 * t2 + c3 * t3;
    }
  };
}
const tmp = new Vector3$1();
const px = new CubicPoly(), py = new CubicPoly(), pz = new CubicPoly();
class CatmullRomCurve3 extends Curve {
  constructor(points = [], closed = false, curveType = "centripetal", tension = 0.5) {
    super();
    this.type = "CatmullRomCurve3";
    this.points = points;
    this.closed = closed;
    this.curveType = curveType;
    this.tension = tension;
  }
  getPoint(t, optionalTarget = new Vector3$1()) {
    const point = optionalTarget;
    const points = this.points;
    const l = points.length;
    const p = (l - (this.closed ? 0 : 1)) * t;
    let intPoint = Math.floor(p);
    let weight = p - intPoint;
    if (this.closed) {
      intPoint += intPoint > 0 ? 0 : (Math.floor(Math.abs(intPoint) / l) + 1) * l;
    } else if (weight === 0 && intPoint === l - 1) {
      intPoint = l - 2;
      weight = 1;
    }
    let p0, p3;
    if (this.closed || intPoint > 0) {
      p0 = points[(intPoint - 1) % l];
    } else {
      tmp.subVectors(points[0], points[1]).add(points[0]);
      p0 = tmp;
    }
    const p1 = points[intPoint % l];
    const p2 = points[(intPoint + 1) % l];
    if (this.closed || intPoint + 2 < l) {
      p3 = points[(intPoint + 2) % l];
    } else {
      tmp.subVectors(points[l - 1], points[l - 2]).add(points[l - 1]);
      p3 = tmp;
    }
    if (this.curveType === "centripetal" || this.curveType === "chordal") {
      const pow = this.curveType === "chordal" ? 0.5 : 0.25;
      let dt0 = Math.pow(p0.distanceToSquared(p1), pow);
      let dt1 = Math.pow(p1.distanceToSquared(p2), pow);
      let dt2 = Math.pow(p2.distanceToSquared(p3), pow);
      if (dt1 < 1e-4)
        dt1 = 1;
      if (dt0 < 1e-4)
        dt0 = dt1;
      if (dt2 < 1e-4)
        dt2 = dt1;
      px.initNonuniformCatmullRom(p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2);
      py.initNonuniformCatmullRom(p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2);
      pz.initNonuniformCatmullRom(p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2);
    } else if (this.curveType === "catmullrom") {
      px.initCatmullRom(p0.x, p1.x, p2.x, p3.x, this.tension);
      py.initCatmullRom(p0.y, p1.y, p2.y, p3.y, this.tension);
      pz.initCatmullRom(p0.z, p1.z, p2.z, p3.z, this.tension);
    }
    point.set(px.calc(weight), py.calc(weight), pz.calc(weight));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.points = [];
    for (let i = 0, l = source.points.length; i < l; i++) {
      const point = source.points[i];
      this.points.push(point.clone());
    }
    this.closed = source.closed;
    this.curveType = source.curveType;
    this.tension = source.tension;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.points = [];
    for (let i = 0, l = this.points.length; i < l; i++) {
      const point = this.points[i];
      data.points.push(point.toArray());
    }
    data.closed = this.closed;
    data.curveType = this.curveType;
    data.tension = this.tension;
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.points = [];
    for (let i = 0, l = json.points.length; i < l; i++) {
      const point = json.points[i];
      this.points.push(new Vector3$1().fromArray(point));
    }
    this.closed = json.closed;
    this.curveType = json.curveType;
    this.tension = json.tension;
    return this;
  }
}
CatmullRomCurve3.prototype.isCatmullRomCurve3 = true;
function CatmullRom(t, p0, p1, p2, p3) {
  const v0 = (p2 - p0) * 0.5;
  const v1 = (p3 - p1) * 0.5;
  const t2 = t * t;
  const t3 = t * t2;
  return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;
}
function QuadraticBezierP0(t, p) {
  const k = 1 - t;
  return k * k * p;
}
function QuadraticBezierP1(t, p) {
  return 2 * (1 - t) * t * p;
}
function QuadraticBezierP2(t, p) {
  return t * t * p;
}
function QuadraticBezier(t, p0, p1, p2) {
  return QuadraticBezierP0(t, p0) + QuadraticBezierP1(t, p1) + QuadraticBezierP2(t, p2);
}
function CubicBezierP0(t, p) {
  const k = 1 - t;
  return k * k * k * p;
}
function CubicBezierP1(t, p) {
  const k = 1 - t;
  return 3 * k * k * t * p;
}
function CubicBezierP2(t, p) {
  return 3 * (1 - t) * t * t * p;
}
function CubicBezierP3(t, p) {
  return t * t * t * p;
}
function CubicBezier(t, p0, p1, p2, p3) {
  return CubicBezierP0(t, p0) + CubicBezierP1(t, p1) + CubicBezierP2(t, p2) + CubicBezierP3(t, p3);
}
class CubicBezierCurve extends Curve {
  constructor(v0 = new Vector2$1(), v1 = new Vector2$1(), v2 = new Vector2$1(), v3 = new Vector2$1()) {
    super();
    this.type = "CubicBezierCurve";
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
    this.v3 = v3;
  }
  getPoint(t, optionalTarget = new Vector2$1()) {
    const point = optionalTarget;
    const v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;
    point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.v0.copy(source.v0);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    this.v3.copy(source.v3);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v0 = this.v0.toArray();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    data.v3 = this.v3.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v0.fromArray(json.v0);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    this.v3.fromArray(json.v3);
    return this;
  }
}
CubicBezierCurve.prototype.isCubicBezierCurve = true;
class CubicBezierCurve3 extends Curve {
  constructor(v0 = new Vector3$1(), v1 = new Vector3$1(), v2 = new Vector3$1(), v3 = new Vector3$1()) {
    super();
    this.type = "CubicBezierCurve3";
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
    this.v3 = v3;
  }
  getPoint(t, optionalTarget = new Vector3$1()) {
    const point = optionalTarget;
    const v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;
    point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y), CubicBezier(t, v0.z, v1.z, v2.z, v3.z));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.v0.copy(source.v0);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    this.v3.copy(source.v3);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v0 = this.v0.toArray();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    data.v3 = this.v3.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v0.fromArray(json.v0);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    this.v3.fromArray(json.v3);
    return this;
  }
}
CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;
class LineCurve extends Curve {
  constructor(v1 = new Vector2$1(), v2 = new Vector2$1()) {
    super();
    this.type = "LineCurve";
    this.v1 = v1;
    this.v2 = v2;
  }
  getPoint(t, optionalTarget = new Vector2$1()) {
    const point = optionalTarget;
    if (t === 1) {
      point.copy(this.v2);
    } else {
      point.copy(this.v2).sub(this.v1);
      point.multiplyScalar(t).add(this.v1);
    }
    return point;
  }
  getPointAt(u, optionalTarget) {
    return this.getPoint(u, optionalTarget);
  }
  getTangent(t, optionalTarget) {
    const tangent = optionalTarget || new Vector2$1();
    tangent.copy(this.v2).sub(this.v1).normalize();
    return tangent;
  }
  copy(source) {
    super.copy(source);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    return this;
  }
}
LineCurve.prototype.isLineCurve = true;
class LineCurve3 extends Curve {
  constructor(v1 = new Vector3$1(), v2 = new Vector3$1()) {
    super();
    this.type = "LineCurve3";
    this.isLineCurve3 = true;
    this.v1 = v1;
    this.v2 = v2;
  }
  getPoint(t, optionalTarget = new Vector3$1()) {
    const point = optionalTarget;
    if (t === 1) {
      point.copy(this.v2);
    } else {
      point.copy(this.v2).sub(this.v1);
      point.multiplyScalar(t).add(this.v1);
    }
    return point;
  }
  getPointAt(u, optionalTarget) {
    return this.getPoint(u, optionalTarget);
  }
  copy(source) {
    super.copy(source);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    return this;
  }
}
class QuadraticBezierCurve extends Curve {
  constructor(v0 = new Vector2$1(), v1 = new Vector2$1(), v2 = new Vector2$1()) {
    super();
    this.type = "QuadraticBezierCurve";
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
  }
  getPoint(t, optionalTarget = new Vector2$1()) {
    const point = optionalTarget;
    const v0 = this.v0, v1 = this.v1, v2 = this.v2;
    point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.v0.copy(source.v0);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v0 = this.v0.toArray();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v0.fromArray(json.v0);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    return this;
  }
}
QuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;
class QuadraticBezierCurve3 extends Curve {
  constructor(v0 = new Vector3$1(), v1 = new Vector3$1(), v2 = new Vector3$1()) {
    super();
    this.type = "QuadraticBezierCurve3";
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
  }
  getPoint(t, optionalTarget = new Vector3$1()) {
    const point = optionalTarget;
    const v0 = this.v0, v1 = this.v1, v2 = this.v2;
    point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y), QuadraticBezier(t, v0.z, v1.z, v2.z));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.v0.copy(source.v0);
    this.v1.copy(source.v1);
    this.v2.copy(source.v2);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.v0 = this.v0.toArray();
    data.v1 = this.v1.toArray();
    data.v2 = this.v2.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.v0.fromArray(json.v0);
    this.v1.fromArray(json.v1);
    this.v2.fromArray(json.v2);
    return this;
  }
}
QuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;
class SplineCurve extends Curve {
  constructor(points = []) {
    super();
    this.type = "SplineCurve";
    this.points = points;
  }
  getPoint(t, optionalTarget = new Vector2$1()) {
    const point = optionalTarget;
    const points = this.points;
    const p = (points.length - 1) * t;
    const intPoint = Math.floor(p);
    const weight = p - intPoint;
    const p0 = points[intPoint === 0 ? intPoint : intPoint - 1];
    const p1 = points[intPoint];
    const p2 = points[intPoint > points.length - 2 ? points.length - 1 : intPoint + 1];
    const p3 = points[intPoint > points.length - 3 ? points.length - 1 : intPoint + 2];
    point.set(CatmullRom(weight, p0.x, p1.x, p2.x, p3.x), CatmullRom(weight, p0.y, p1.y, p2.y, p3.y));
    return point;
  }
  copy(source) {
    super.copy(source);
    this.points = [];
    for (let i = 0, l = source.points.length; i < l; i++) {
      const point = source.points[i];
      this.points.push(point.clone());
    }
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.points = [];
    for (let i = 0, l = this.points.length; i < l; i++) {
      const point = this.points[i];
      data.points.push(point.toArray());
    }
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.points = [];
    for (let i = 0, l = json.points.length; i < l; i++) {
      const point = json.points[i];
      this.points.push(new Vector2$1().fromArray(point));
    }
    return this;
  }
}
SplineCurve.prototype.isSplineCurve = true;
var Curves = /* @__PURE__ */ Object.freeze({
  __proto__: null,
  ArcCurve,
  CatmullRomCurve3,
  CubicBezierCurve,
  CubicBezierCurve3,
  EllipseCurve,
  LineCurve,
  LineCurve3,
  QuadraticBezierCurve,
  QuadraticBezierCurve3,
  SplineCurve
});
class CurvePath extends Curve {
  constructor() {
    super();
    this.type = "CurvePath";
    this.curves = [];
    this.autoClose = false;
  }
  add(curve) {
    this.curves.push(curve);
  }
  closePath() {
    const startPoint = this.curves[0].getPoint(0);
    const endPoint = this.curves[this.curves.length - 1].getPoint(1);
    if (!startPoint.equals(endPoint)) {
      this.curves.push(new LineCurve(endPoint, startPoint));
    }
  }
  getPoint(t, optionalTarget) {
    const d = t * this.getLength();
    const curveLengths = this.getCurveLengths();
    let i = 0;
    while (i < curveLengths.length) {
      if (curveLengths[i] >= d) {
        const diff = curveLengths[i] - d;
        const curve = this.curves[i];
        const segmentLength = curve.getLength();
        const u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;
        return curve.getPointAt(u, optionalTarget);
      }
      i++;
    }
    return null;
  }
  getLength() {
    const lens = this.getCurveLengths();
    return lens[lens.length - 1];
  }
  updateArcLengths() {
    this.needsUpdate = true;
    this.cacheLengths = null;
    this.getCurveLengths();
  }
  getCurveLengths() {
    if (this.cacheLengths && this.cacheLengths.length === this.curves.length) {
      return this.cacheLengths;
    }
    const lengths = [];
    let sums = 0;
    for (let i = 0, l = this.curves.length; i < l; i++) {
      sums += this.curves[i].getLength();
      lengths.push(sums);
    }
    this.cacheLengths = lengths;
    return lengths;
  }
  getSpacedPoints(divisions = 40) {
    const points = [];
    for (let i = 0; i <= divisions; i++) {
      points.push(this.getPoint(i / divisions));
    }
    if (this.autoClose) {
      points.push(points[0]);
    }
    return points;
  }
  getPoints(divisions = 12) {
    const points = [];
    let last;
    for (let i = 0, curves = this.curves; i < curves.length; i++) {
      const curve = curves[i];
      const resolution = curve && curve.isEllipseCurve ? divisions * 2 : curve && (curve.isLineCurve || curve.isLineCurve3) ? 1 : curve && curve.isSplineCurve ? divisions * curve.points.length : divisions;
      const pts = curve.getPoints(resolution);
      for (let j = 0; j < pts.length; j++) {
        const point = pts[j];
        if (last && last.equals(point))
          continue;
        points.push(point);
        last = point;
      }
    }
    if (this.autoClose && points.length > 1 && !points[points.length - 1].equals(points[0])) {
      points.push(points[0]);
    }
    return points;
  }
  copy(source) {
    super.copy(source);
    this.curves = [];
    for (let i = 0, l = source.curves.length; i < l; i++) {
      const curve = source.curves[i];
      this.curves.push(curve.clone());
    }
    this.autoClose = source.autoClose;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.autoClose = this.autoClose;
    data.curves = [];
    for (let i = 0, l = this.curves.length; i < l; i++) {
      const curve = this.curves[i];
      data.curves.push(curve.toJSON());
    }
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.autoClose = json.autoClose;
    this.curves = [];
    for (let i = 0, l = json.curves.length; i < l; i++) {
      const curve = json.curves[i];
      this.curves.push(new Curves[curve.type]().fromJSON(curve));
    }
    return this;
  }
}
class Path extends CurvePath {
  constructor(points) {
    super();
    this.type = "Path";
    this.currentPoint = new Vector2$1();
    if (points) {
      this.setFromPoints(points);
    }
  }
  setFromPoints(points) {
    this.moveTo(points[0].x, points[0].y);
    for (let i = 1, l = points.length; i < l; i++) {
      this.lineTo(points[i].x, points[i].y);
    }
    return this;
  }
  moveTo(x, y) {
    this.currentPoint.set(x, y);
    return this;
  }
  lineTo(x, y) {
    const curve = new LineCurve(this.currentPoint.clone(), new Vector2$1(x, y));
    this.curves.push(curve);
    this.currentPoint.set(x, y);
    return this;
  }
  quadraticCurveTo(aCPx, aCPy, aX, aY) {
    const curve = new QuadraticBezierCurve(this.currentPoint.clone(), new Vector2$1(aCPx, aCPy), new Vector2$1(aX, aY));
    this.curves.push(curve);
    this.currentPoint.set(aX, aY);
    return this;
  }
  bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY) {
    const curve = new CubicBezierCurve(this.currentPoint.clone(), new Vector2$1(aCP1x, aCP1y), new Vector2$1(aCP2x, aCP2y), new Vector2$1(aX, aY));
    this.curves.push(curve);
    this.currentPoint.set(aX, aY);
    return this;
  }
  splineThru(pts) {
    const npts = [this.currentPoint.clone()].concat(pts);
    const curve = new SplineCurve(npts);
    this.curves.push(curve);
    this.currentPoint.copy(pts[pts.length - 1]);
    return this;
  }
  arc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
    const x0 = this.currentPoint.x;
    const y0 = this.currentPoint.y;
    this.absarc(aX + x0, aY + y0, aRadius, aStartAngle, aEndAngle, aClockwise);
    return this;
  }
  absarc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
    this.absellipse(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
    return this;
  }
  ellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
    const x0 = this.currentPoint.x;
    const y0 = this.currentPoint.y;
    this.absellipse(aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);
    return this;
  }
  absellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
    const curve = new EllipseCurve(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);
    if (this.curves.length > 0) {
      const firstPoint = curve.getPoint(0);
      if (!firstPoint.equals(this.currentPoint)) {
        this.lineTo(firstPoint.x, firstPoint.y);
      }
    }
    this.curves.push(curve);
    const lastPoint = curve.getPoint(1);
    this.currentPoint.copy(lastPoint);
    return this;
  }
  copy(source) {
    super.copy(source);
    this.currentPoint.copy(source.currentPoint);
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.currentPoint = this.currentPoint.toArray();
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.currentPoint.fromArray(json.currentPoint);
    return this;
  }
}
class Shape extends Path {
  constructor(points) {
    super(points);
    this.uuid = generateUUID();
    this.type = "Shape";
    this.holes = [];
  }
  getPointsHoles(divisions) {
    const holesPts = [];
    for (let i = 0, l = this.holes.length; i < l; i++) {
      holesPts[i] = this.holes[i].getPoints(divisions);
    }
    return holesPts;
  }
  extractPoints(divisions) {
    return {
      shape: this.getPoints(divisions),
      holes: this.getPointsHoles(divisions)
    };
  }
  copy(source) {
    super.copy(source);
    this.holes = [];
    for (let i = 0, l = source.holes.length; i < l; i++) {
      const hole = source.holes[i];
      this.holes.push(hole.clone());
    }
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.uuid = this.uuid;
    data.holes = [];
    for (let i = 0, l = this.holes.length; i < l; i++) {
      const hole = this.holes[i];
      data.holes.push(hole.toJSON());
    }
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.uuid = json.uuid;
    this.holes = [];
    for (let i = 0, l = json.holes.length; i < l; i++) {
      const hole = json.holes[i];
      this.holes.push(new Path().fromJSON(hole));
    }
    return this;
  }
}
const Earcut = {
  triangulate: function(data, holeIndices, dim = 2) {
    const hasHoles = holeIndices && holeIndices.length;
    const outerLen = hasHoles ? holeIndices[0] * dim : data.length;
    let outerNode = linkedList(data, 0, outerLen, dim, true);
    const triangles = [];
    if (!outerNode || outerNode.next === outerNode.prev)
      return triangles;
    let minX, minY, maxX, maxY, x, y, invSize;
    if (hasHoles)
      outerNode = eliminateHoles(data, holeIndices, outerNode, dim);
    if (data.length > 80 * dim) {
      minX = maxX = data[0];
      minY = maxY = data[1];
      for (let i = dim; i < outerLen; i += dim) {
        x = data[i];
        y = data[i + 1];
        if (x < minX)
          minX = x;
        if (y < minY)
          minY = y;
        if (x > maxX)
          maxX = x;
        if (y > maxY)
          maxY = y;
      }
      invSize = Math.max(maxX - minX, maxY - minY);
      invSize = invSize !== 0 ? 1 / invSize : 0;
    }
    earcutLinked(outerNode, triangles, dim, minX, minY, invSize);
    return triangles;
  }
};
function linkedList(data, start, end, dim, clockwise) {
  let i, last;
  if (clockwise === signedArea(data, start, end, dim) > 0) {
    for (i = start; i < end; i += dim)
      last = insertNode(i, data[i], data[i + 1], last);
  } else {
    for (i = end - dim; i >= start; i -= dim)
      last = insertNode(i, data[i], data[i + 1], last);
  }
  if (last && equals$1(last, last.next)) {
    removeNode(last);
    last = last.next;
  }
  return last;
}
function filterPoints(start, end) {
  if (!start)
    return start;
  if (!end)
    end = start;
  let p = start, again;
  do {
    again = false;
    if (!p.steiner && (equals$1(p, p.next) || area(p.prev, p, p.next) === 0)) {
      removeNode(p);
      p = end = p.prev;
      if (p === p.next)
        break;
      again = true;
    } else {
      p = p.next;
    }
  } while (again || p !== end);
  return end;
}
function earcutLinked(ear, triangles, dim, minX, minY, invSize, pass) {
  if (!ear)
    return;
  if (!pass && invSize)
    indexCurve(ear, minX, minY, invSize);
  let stop = ear, prev, next;
  while (ear.prev !== ear.next) {
    prev = ear.prev;
    next = ear.next;
    if (invSize ? isEarHashed(ear, minX, minY, invSize) : isEar(ear)) {
      triangles.push(prev.i / dim);
      triangles.push(ear.i / dim);
      triangles.push(next.i / dim);
      removeNode(ear);
      ear = next.next;
      stop = next.next;
      continue;
    }
    ear = next;
    if (ear === stop) {
      if (!pass) {
        earcutLinked(filterPoints(ear), triangles, dim, minX, minY, invSize, 1);
      } else if (pass === 1) {
        ear = cureLocalIntersections(filterPoints(ear), triangles, dim);
        earcutLinked(ear, triangles, dim, minX, minY, invSize, 2);
      } else if (pass === 2) {
        splitEarcut(ear, triangles, dim, minX, minY, invSize);
      }
      break;
    }
  }
}
function isEar(ear) {
  const a = ear.prev, b = ear, c = ear.next;
  if (area(a, b, c) >= 0)
    return false;
  let p = ear.next.next;
  while (p !== ear.prev) {
    if (pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0)
      return false;
    p = p.next;
  }
  return true;
}
function isEarHashed(ear, minX, minY, invSize) {
  const a = ear.prev, b = ear, c = ear.next;
  if (area(a, b, c) >= 0)
    return false;
  const minTX = a.x < b.x ? a.x < c.x ? a.x : c.x : b.x < c.x ? b.x : c.x, minTY = a.y < b.y ? a.y < c.y ? a.y : c.y : b.y < c.y ? b.y : c.y, maxTX = a.x > b.x ? a.x > c.x ? a.x : c.x : b.x > c.x ? b.x : c.x, maxTY = a.y > b.y ? a.y > c.y ? a.y : c.y : b.y > c.y ? b.y : c.y;
  const minZ = zOrder(minTX, minTY, minX, minY, invSize), maxZ = zOrder(maxTX, maxTY, minX, minY, invSize);
  let p = ear.prevZ, n = ear.nextZ;
  while (p && p.z >= minZ && n && n.z <= maxZ) {
    if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0)
      return false;
    p = p.prevZ;
    if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0)
      return false;
    n = n.nextZ;
  }
  while (p && p.z >= minZ) {
    if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0)
      return false;
    p = p.prevZ;
  }
  while (n && n.z <= maxZ) {
    if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0)
      return false;
    n = n.nextZ;
  }
  return true;
}
function cureLocalIntersections(start, triangles, dim) {
  let p = start;
  do {
    const a = p.prev, b = p.next.next;
    if (!equals$1(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {
      triangles.push(a.i / dim);
      triangles.push(p.i / dim);
      triangles.push(b.i / dim);
      removeNode(p);
      removeNode(p.next);
      p = start = b;
    }
    p = p.next;
  } while (p !== start);
  return filterPoints(p);
}
function splitEarcut(start, triangles, dim, minX, minY, invSize) {
  let a = start;
  do {
    let b = a.next.next;
    while (b !== a.prev) {
      if (a.i !== b.i && isValidDiagonal(a, b)) {
        let c = splitPolygon(a, b);
        a = filterPoints(a, a.next);
        c = filterPoints(c, c.next);
        earcutLinked(a, triangles, dim, minX, minY, invSize);
        earcutLinked(c, triangles, dim, minX, minY, invSize);
        return;
      }
      b = b.next;
    }
    a = a.next;
  } while (a !== start);
}
function eliminateHoles(data, holeIndices, outerNode, dim) {
  const queue = [];
  let i, len, start, end, list;
  for (i = 0, len = holeIndices.length; i < len; i++) {
    start = holeIndices[i] * dim;
    end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
    list = linkedList(data, start, end, dim, false);
    if (list === list.next)
      list.steiner = true;
    queue.push(getLeftmost(list));
  }
  queue.sort(compareX);
  for (i = 0; i < queue.length; i++) {
    eliminateHole(queue[i], outerNode);
    outerNode = filterPoints(outerNode, outerNode.next);
  }
  return outerNode;
}
function compareX(a, b) {
  return a.x - b.x;
}
function eliminateHole(hole, outerNode) {
  outerNode = findHoleBridge(hole, outerNode);
  if (outerNode) {
    const b = splitPolygon(outerNode, hole);
    filterPoints(outerNode, outerNode.next);
    filterPoints(b, b.next);
  }
}
function findHoleBridge(hole, outerNode) {
  let p = outerNode;
  const hx = hole.x;
  const hy = hole.y;
  let qx = -Infinity, m;
  do {
    if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
      const x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);
      if (x <= hx && x > qx) {
        qx = x;
        if (x === hx) {
          if (hy === p.y)
            return p;
          if (hy === p.next.y)
            return p.next;
        }
        m = p.x < p.next.x ? p : p.next;
      }
    }
    p = p.next;
  } while (p !== outerNode);
  if (!m)
    return null;
  if (hx === qx)
    return m;
  const stop = m, mx = m.x, my = m.y;
  let tanMin = Infinity, tan;
  p = m;
  do {
    if (hx >= p.x && p.x >= mx && hx !== p.x && pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {
      tan = Math.abs(hy - p.y) / (hx - p.x);
      if (locallyInside(p, hole) && (tan < tanMin || tan === tanMin && (p.x > m.x || p.x === m.x && sectorContainsSector(m, p)))) {
        m = p;
        tanMin = tan;
      }
    }
    p = p.next;
  } while (p !== stop);
  return m;
}
function sectorContainsSector(m, p) {
  return area(m.prev, m, p.prev) < 0 && area(p.next, m, m.next) < 0;
}
function indexCurve(start, minX, minY, invSize) {
  let p = start;
  do {
    if (p.z === null)
      p.z = zOrder(p.x, p.y, minX, minY, invSize);
    p.prevZ = p.prev;
    p.nextZ = p.next;
    p = p.next;
  } while (p !== start);
  p.prevZ.nextZ = null;
  p.prevZ = null;
  sortLinked(p);
}
function sortLinked(list) {
  let i, p, q, e, tail, numMerges, pSize, qSize, inSize = 1;
  do {
    p = list;
    list = null;
    tail = null;
    numMerges = 0;
    while (p) {
      numMerges++;
      q = p;
      pSize = 0;
      for (i = 0; i < inSize; i++) {
        pSize++;
        q = q.nextZ;
        if (!q)
          break;
      }
      qSize = inSize;
      while (pSize > 0 || qSize > 0 && q) {
        if (pSize !== 0 && (qSize === 0 || !q || p.z <= q.z)) {
          e = p;
          p = p.nextZ;
          pSize--;
        } else {
          e = q;
          q = q.nextZ;
          qSize--;
        }
        if (tail)
          tail.nextZ = e;
        else
          list = e;
        e.prevZ = tail;
        tail = e;
      }
      p = q;
    }
    tail.nextZ = null;
    inSize *= 2;
  } while (numMerges > 1);
  return list;
}
function zOrder(x, y, minX, minY, invSize) {
  x = 32767 * (x - minX) * invSize;
  y = 32767 * (y - minY) * invSize;
  x = (x | x << 8) & 16711935;
  x = (x | x << 4) & 252645135;
  x = (x | x << 2) & 858993459;
  x = (x | x << 1) & 1431655765;
  y = (y | y << 8) & 16711935;
  y = (y | y << 4) & 252645135;
  y = (y | y << 2) & 858993459;
  y = (y | y << 1) & 1431655765;
  return x | y << 1;
}
function getLeftmost(start) {
  let p = start, leftmost = start;
  do {
    if (p.x < leftmost.x || p.x === leftmost.x && p.y < leftmost.y)
      leftmost = p;
    p = p.next;
  } while (p !== start);
  return leftmost;
}
function pointInTriangle(ax, ay, bx, by, cx, cy, px2, py2) {
  return (cx - px2) * (ay - py2) - (ax - px2) * (cy - py2) >= 0 && (ax - px2) * (by - py2) - (bx - px2) * (ay - py2) >= 0 && (bx - px2) * (cy - py2) - (cx - px2) * (by - py2) >= 0;
}
function isValidDiagonal(a, b) {
  return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && (locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b) && (area(a.prev, a, b.prev) || area(a, b.prev, b)) || equals$1(a, b) && area(a.prev, a, a.next) > 0 && area(b.prev, b, b.next) > 0);
}
function area(p, q, r) {
  return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);
}
function equals$1(p1, p2) {
  return p1.x === p2.x && p1.y === p2.y;
}
function intersects(p1, q1, p2, q2) {
  const o1 = sign(area(p1, q1, p2));
  const o2 = sign(area(p1, q1, q2));
  const o3 = sign(area(p2, q2, p1));
  const o4 = sign(area(p2, q2, q1));
  if (o1 !== o2 && o3 !== o4)
    return true;
  if (o1 === 0 && onSegment(p1, p2, q1))
    return true;
  if (o2 === 0 && onSegment(p1, q2, q1))
    return true;
  if (o3 === 0 && onSegment(p2, p1, q2))
    return true;
  if (o4 === 0 && onSegment(p2, q1, q2))
    return true;
  return false;
}
function onSegment(p, q, r) {
  return q.x <= Math.max(p.x, r.x) && q.x >= Math.min(p.x, r.x) && q.y <= Math.max(p.y, r.y) && q.y >= Math.min(p.y, r.y);
}
function sign(num) {
  return num > 0 ? 1 : num < 0 ? -1 : 0;
}
function intersectsPolygon(a, b) {
  let p = a;
  do {
    if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i && intersects(p, p.next, a, b))
      return true;
    p = p.next;
  } while (p !== a);
  return false;
}
function locallyInside(a, b) {
  return area(a.prev, a, a.next) < 0 ? area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 : area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;
}
function middleInside(a, b) {
  let p = a, inside = false;
  const px2 = (a.x + b.x) / 2, py2 = (a.y + b.y) / 2;
  do {
    if (p.y > py2 !== p.next.y > py2 && p.next.y !== p.y && px2 < (p.next.x - p.x) * (py2 - p.y) / (p.next.y - p.y) + p.x)
      inside = !inside;
    p = p.next;
  } while (p !== a);
  return inside;
}
function splitPolygon(a, b) {
  const a2 = new Node(a.i, a.x, a.y), b2 = new Node(b.i, b.x, b.y), an = a.next, bp = b.prev;
  a.next = b;
  b.prev = a;
  a2.next = an;
  an.prev = a2;
  b2.next = a2;
  a2.prev = b2;
  bp.next = b2;
  b2.prev = bp;
  return b2;
}
function insertNode(i, x, y, last) {
  const p = new Node(i, x, y);
  if (!last) {
    p.prev = p;
    p.next = p;
  } else {
    p.next = last.next;
    p.prev = last;
    last.next.prev = p;
    last.next = p;
  }
  return p;
}
function removeNode(p) {
  p.next.prev = p.prev;
  p.prev.next = p.next;
  if (p.prevZ)
    p.prevZ.nextZ = p.nextZ;
  if (p.nextZ)
    p.nextZ.prevZ = p.prevZ;
}
function Node(i, x, y) {
  this.i = i;
  this.x = x;
  this.y = y;
  this.prev = null;
  this.next = null;
  this.z = null;
  this.prevZ = null;
  this.nextZ = null;
  this.steiner = false;
}
function signedArea(data, start, end, dim) {
  let sum = 0;
  for (let i = start, j = end - dim; i < end; i += dim) {
    sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);
    j = i;
  }
  return sum;
}
class ShapeUtils {
  static area(contour) {
    const n = contour.length;
    let a = 0;
    for (let p = n - 1, q = 0; q < n; p = q++) {
      a += contour[p].x * contour[q].y - contour[q].x * contour[p].y;
    }
    return a * 0.5;
  }
  static isClockWise(pts) {
    return ShapeUtils.area(pts) < 0;
  }
  static triangulateShape(contour, holes) {
    const vertices = [];
    const holeIndices = [];
    const faces = [];
    removeDupEndPts(contour);
    addContour(vertices, contour);
    let holeIndex = contour.length;
    holes.forEach(removeDupEndPts);
    for (let i = 0; i < holes.length; i++) {
      holeIndices.push(holeIndex);
      holeIndex += holes[i].length;
      addContour(vertices, holes[i]);
    }
    const triangles = Earcut.triangulate(vertices, holeIndices);
    for (let i = 0; i < triangles.length; i += 3) {
      faces.push(triangles.slice(i, i + 3));
    }
    return faces;
  }
}
function removeDupEndPts(points) {
  const l = points.length;
  if (l > 2 && points[l - 1].equals(points[0])) {
    points.pop();
  }
}
function addContour(vertices, contour) {
  for (let i = 0; i < contour.length; i++) {
    vertices.push(contour[i].x);
    vertices.push(contour[i].y);
  }
}
class ExtrudeGeometry extends BufferGeometry {
  constructor(shapes = new Shape([new Vector2$1(0.5, 0.5), new Vector2$1(-0.5, 0.5), new Vector2$1(-0.5, -0.5), new Vector2$1(0.5, -0.5)]), options = {}) {
    super();
    this.type = "ExtrudeGeometry";
    this.parameters = {
      shapes,
      options
    };
    shapes = Array.isArray(shapes) ? shapes : [shapes];
    const scope = this;
    const verticesArray = [];
    const uvArray = [];
    for (let i = 0, l = shapes.length; i < l; i++) {
      const shape = shapes[i];
      addShape(shape);
    }
    this.setAttribute("position", new Float32BufferAttribute(verticesArray, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvArray, 2));
    this.computeVertexNormals();
    function addShape(shape) {
      const placeholder = [];
      const curveSegments = options.curveSegments !== void 0 ? options.curveSegments : 12;
      const steps = options.steps !== void 0 ? options.steps : 1;
      let depth = options.depth !== void 0 ? options.depth : 1;
      let bevelEnabled = options.bevelEnabled !== void 0 ? options.bevelEnabled : true;
      let bevelThickness = options.bevelThickness !== void 0 ? options.bevelThickness : 0.2;
      let bevelSize = options.bevelSize !== void 0 ? options.bevelSize : bevelThickness - 0.1;
      let bevelOffset = options.bevelOffset !== void 0 ? options.bevelOffset : 0;
      let bevelSegments = options.bevelSegments !== void 0 ? options.bevelSegments : 3;
      const extrudePath = options.extrudePath;
      const uvgen = options.UVGenerator !== void 0 ? options.UVGenerator : WorldUVGenerator;
      if (options.amount !== void 0) {
        console.warn("THREE.ExtrudeBufferGeometry: amount has been renamed to depth.");
        depth = options.amount;
      }
      let extrudePts, extrudeByPath = false;
      let splineTube, binormal, normal, position2;
      if (extrudePath) {
        extrudePts = extrudePath.getSpacedPoints(steps);
        extrudeByPath = true;
        bevelEnabled = false;
        splineTube = extrudePath.computeFrenetFrames(steps, false);
        binormal = new Vector3$1();
        normal = new Vector3$1();
        position2 = new Vector3$1();
      }
      if (!bevelEnabled) {
        bevelSegments = 0;
        bevelThickness = 0;
        bevelSize = 0;
        bevelOffset = 0;
      }
      const shapePoints = shape.extractPoints(curveSegments);
      let vertices = shapePoints.shape;
      const holes = shapePoints.holes;
      const reverse = !ShapeUtils.isClockWise(vertices);
      if (reverse) {
        vertices = vertices.reverse();
        for (let h = 0, hl = holes.length; h < hl; h++) {
          const ahole = holes[h];
          if (ShapeUtils.isClockWise(ahole)) {
            holes[h] = ahole.reverse();
          }
        }
      }
      const faces = ShapeUtils.triangulateShape(vertices, holes);
      const contour = vertices;
      for (let h = 0, hl = holes.length; h < hl; h++) {
        const ahole = holes[h];
        vertices = vertices.concat(ahole);
      }
      function scalePt2(pt, vec, size) {
        if (!vec)
          console.error("THREE.ExtrudeGeometry: vec does not exist");
        return vec.clone().multiplyScalar(size).add(pt);
      }
      const vlen = vertices.length, flen = faces.length;
      function getBevelVec(inPt, inPrev, inNext) {
        let v_trans_x, v_trans_y, shrink_by;
        const v_prev_x = inPt.x - inPrev.x, v_prev_y = inPt.y - inPrev.y;
        const v_next_x = inNext.x - inPt.x, v_next_y = inNext.y - inPt.y;
        const v_prev_lensq = v_prev_x * v_prev_x + v_prev_y * v_prev_y;
        const collinear0 = v_prev_x * v_next_y - v_prev_y * v_next_x;
        if (Math.abs(collinear0) > Number.EPSILON) {
          const v_prev_len = Math.sqrt(v_prev_lensq);
          const v_next_len = Math.sqrt(v_next_x * v_next_x + v_next_y * v_next_y);
          const ptPrevShift_x = inPrev.x - v_prev_y / v_prev_len;
          const ptPrevShift_y = inPrev.y + v_prev_x / v_prev_len;
          const ptNextShift_x = inNext.x - v_next_y / v_next_len;
          const ptNextShift_y = inNext.y + v_next_x / v_next_len;
          const sf = ((ptNextShift_x - ptPrevShift_x) * v_next_y - (ptNextShift_y - ptPrevShift_y) * v_next_x) / (v_prev_x * v_next_y - v_prev_y * v_next_x);
          v_trans_x = ptPrevShift_x + v_prev_x * sf - inPt.x;
          v_trans_y = ptPrevShift_y + v_prev_y * sf - inPt.y;
          const v_trans_lensq = v_trans_x * v_trans_x + v_trans_y * v_trans_y;
          if (v_trans_lensq <= 2) {
            return new Vector2$1(v_trans_x, v_trans_y);
          } else {
            shrink_by = Math.sqrt(v_trans_lensq / 2);
          }
        } else {
          let direction_eq = false;
          if (v_prev_x > Number.EPSILON) {
            if (v_next_x > Number.EPSILON) {
              direction_eq = true;
            }
          } else {
            if (v_prev_x < -Number.EPSILON) {
              if (v_next_x < -Number.EPSILON) {
                direction_eq = true;
              }
            } else {
              if (Math.sign(v_prev_y) === Math.sign(v_next_y)) {
                direction_eq = true;
              }
            }
          }
          if (direction_eq) {
            v_trans_x = -v_prev_y;
            v_trans_y = v_prev_x;
            shrink_by = Math.sqrt(v_prev_lensq);
          } else {
            v_trans_x = v_prev_x;
            v_trans_y = v_prev_y;
            shrink_by = Math.sqrt(v_prev_lensq / 2);
          }
        }
        return new Vector2$1(v_trans_x / shrink_by, v_trans_y / shrink_by);
      }
      const contourMovements = [];
      for (let i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {
        if (j === il)
          j = 0;
        if (k === il)
          k = 0;
        contourMovements[i] = getBevelVec(contour[i], contour[j], contour[k]);
      }
      const holesMovements = [];
      let oneHoleMovements, verticesMovements = contourMovements.concat();
      for (let h = 0, hl = holes.length; h < hl; h++) {
        const ahole = holes[h];
        oneHoleMovements = [];
        for (let i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {
          if (j === il)
            j = 0;
          if (k === il)
            k = 0;
          oneHoleMovements[i] = getBevelVec(ahole[i], ahole[j], ahole[k]);
        }
        holesMovements.push(oneHoleMovements);
        verticesMovements = verticesMovements.concat(oneHoleMovements);
      }
      for (let b = 0; b < bevelSegments; b++) {
        const t = b / bevelSegments;
        const z = bevelThickness * Math.cos(t * Math.PI / 2);
        const bs2 = bevelSize * Math.sin(t * Math.PI / 2) + bevelOffset;
        for (let i = 0, il = contour.length; i < il; i++) {
          const vert = scalePt2(contour[i], contourMovements[i], bs2);
          v(vert.x, vert.y, -z);
        }
        for (let h = 0, hl = holes.length; h < hl; h++) {
          const ahole = holes[h];
          oneHoleMovements = holesMovements[h];
          for (let i = 0, il = ahole.length; i < il; i++) {
            const vert = scalePt2(ahole[i], oneHoleMovements[i], bs2);
            v(vert.x, vert.y, -z);
          }
        }
      }
      const bs = bevelSize + bevelOffset;
      for (let i = 0; i < vlen; i++) {
        const vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];
        if (!extrudeByPath) {
          v(vert.x, vert.y, 0);
        } else {
          normal.copy(splineTube.normals[0]).multiplyScalar(vert.x);
          binormal.copy(splineTube.binormals[0]).multiplyScalar(vert.y);
          position2.copy(extrudePts[0]).add(normal).add(binormal);
          v(position2.x, position2.y, position2.z);
        }
      }
      for (let s = 1; s <= steps; s++) {
        for (let i = 0; i < vlen; i++) {
          const vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];
          if (!extrudeByPath) {
            v(vert.x, vert.y, depth / steps * s);
          } else {
            normal.copy(splineTube.normals[s]).multiplyScalar(vert.x);
            binormal.copy(splineTube.binormals[s]).multiplyScalar(vert.y);
            position2.copy(extrudePts[s]).add(normal).add(binormal);
            v(position2.x, position2.y, position2.z);
          }
        }
      }
      for (let b = bevelSegments - 1; b >= 0; b--) {
        const t = b / bevelSegments;
        const z = bevelThickness * Math.cos(t * Math.PI / 2);
        const bs2 = bevelSize * Math.sin(t * Math.PI / 2) + bevelOffset;
        for (let i = 0, il = contour.length; i < il; i++) {
          const vert = scalePt2(contour[i], contourMovements[i], bs2);
          v(vert.x, vert.y, depth + z);
        }
        for (let h = 0, hl = holes.length; h < hl; h++) {
          const ahole = holes[h];
          oneHoleMovements = holesMovements[h];
          for (let i = 0, il = ahole.length; i < il; i++) {
            const vert = scalePt2(ahole[i], oneHoleMovements[i], bs2);
            if (!extrudeByPath) {
              v(vert.x, vert.y, depth + z);
            } else {
              v(vert.x, vert.y + extrudePts[steps - 1].y, extrudePts[steps - 1].x + z);
            }
          }
        }
      }
      buildLidFaces();
      buildSideFaces();
      function buildLidFaces() {
        const start = verticesArray.length / 3;
        if (bevelEnabled) {
          let layer = 0;
          let offset = vlen * layer;
          for (let i = 0; i < flen; i++) {
            const face = faces[i];
            f3(face[2] + offset, face[1] + offset, face[0] + offset);
          }
          layer = steps + bevelSegments * 2;
          offset = vlen * layer;
          for (let i = 0; i < flen; i++) {
            const face = faces[i];
            f3(face[0] + offset, face[1] + offset, face[2] + offset);
          }
        } else {
          for (let i = 0; i < flen; i++) {
            const face = faces[i];
            f3(face[2], face[1], face[0]);
          }
          for (let i = 0; i < flen; i++) {
            const face = faces[i];
            f3(face[0] + vlen * steps, face[1] + vlen * steps, face[2] + vlen * steps);
          }
        }
        scope.addGroup(start, verticesArray.length / 3 - start, 0);
      }
      function buildSideFaces() {
        const start = verticesArray.length / 3;
        let layeroffset = 0;
        sidewalls(contour, layeroffset);
        layeroffset += contour.length;
        for (let h = 0, hl = holes.length; h < hl; h++) {
          const ahole = holes[h];
          sidewalls(ahole, layeroffset);
          layeroffset += ahole.length;
        }
        scope.addGroup(start, verticesArray.length / 3 - start, 1);
      }
      function sidewalls(contour2, layeroffset) {
        let i = contour2.length;
        while (--i >= 0) {
          const j = i;
          let k = i - 1;
          if (k < 0)
            k = contour2.length - 1;
          for (let s = 0, sl = steps + bevelSegments * 2; s < sl; s++) {
            const slen1 = vlen * s;
            const slen2 = vlen * (s + 1);
            const a = layeroffset + j + slen1, b = layeroffset + k + slen1, c = layeroffset + k + slen2, d = layeroffset + j + slen2;
            f4(a, b, c, d);
          }
        }
      }
      function v(x, y, z) {
        placeholder.push(x);
        placeholder.push(y);
        placeholder.push(z);
      }
      function f3(a, b, c) {
        addVertex(a);
        addVertex(b);
        addVertex(c);
        const nextIndex = verticesArray.length / 3;
        const uvs = uvgen.generateTopUV(scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1);
        addUV(uvs[0]);
        addUV(uvs[1]);
        addUV(uvs[2]);
      }
      function f4(a, b, c, d) {
        addVertex(a);
        addVertex(b);
        addVertex(d);
        addVertex(b);
        addVertex(c);
        addVertex(d);
        const nextIndex = verticesArray.length / 3;
        const uvs = uvgen.generateSideWallUV(scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1);
        addUV(uvs[0]);
        addUV(uvs[1]);
        addUV(uvs[3]);
        addUV(uvs[1]);
        addUV(uvs[2]);
        addUV(uvs[3]);
      }
      function addVertex(index) {
        verticesArray.push(placeholder[index * 3 + 0]);
        verticesArray.push(placeholder[index * 3 + 1]);
        verticesArray.push(placeholder[index * 3 + 2]);
      }
      function addUV(vector2) {
        uvArray.push(vector2.x);
        uvArray.push(vector2.y);
      }
    }
  }
  toJSON() {
    const data = super.toJSON();
    const shapes = this.parameters.shapes;
    const options = this.parameters.options;
    return toJSON$1(shapes, options, data);
  }
  static fromJSON(data, shapes) {
    const geometryShapes = [];
    for (let j = 0, jl = data.shapes.length; j < jl; j++) {
      const shape = shapes[data.shapes[j]];
      geometryShapes.push(shape);
    }
    const extrudePath = data.options.extrudePath;
    if (extrudePath !== void 0) {
      data.options.extrudePath = new Curves[extrudePath.type]().fromJSON(extrudePath);
    }
    return new ExtrudeGeometry(geometryShapes, data.options);
  }
}
const WorldUVGenerator = {
  generateTopUV: function(geometry, vertices, indexA, indexB, indexC) {
    const a_x = vertices[indexA * 3];
    const a_y = vertices[indexA * 3 + 1];
    const b_x = vertices[indexB * 3];
    const b_y = vertices[indexB * 3 + 1];
    const c_x = vertices[indexC * 3];
    const c_y = vertices[indexC * 3 + 1];
    return [
      new Vector2$1(a_x, a_y),
      new Vector2$1(b_x, b_y),
      new Vector2$1(c_x, c_y)
    ];
  },
  generateSideWallUV: function(geometry, vertices, indexA, indexB, indexC, indexD) {
    const a_x = vertices[indexA * 3];
    const a_y = vertices[indexA * 3 + 1];
    const a_z = vertices[indexA * 3 + 2];
    const b_x = vertices[indexB * 3];
    const b_y = vertices[indexB * 3 + 1];
    const b_z = vertices[indexB * 3 + 2];
    const c_x = vertices[indexC * 3];
    const c_y = vertices[indexC * 3 + 1];
    const c_z = vertices[indexC * 3 + 2];
    const d_x = vertices[indexD * 3];
    const d_y = vertices[indexD * 3 + 1];
    const d_z = vertices[indexD * 3 + 2];
    if (Math.abs(a_y - b_y) < Math.abs(a_x - b_x)) {
      return [
        new Vector2$1(a_x, 1 - a_z),
        new Vector2$1(b_x, 1 - b_z),
        new Vector2$1(c_x, 1 - c_z),
        new Vector2$1(d_x, 1 - d_z)
      ];
    } else {
      return [
        new Vector2$1(a_y, 1 - a_z),
        new Vector2$1(b_y, 1 - b_z),
        new Vector2$1(c_y, 1 - c_z),
        new Vector2$1(d_y, 1 - d_z)
      ];
    }
  }
};
function toJSON$1(shapes, options, data) {
  data.shapes = [];
  if (Array.isArray(shapes)) {
    for (let i = 0, l = shapes.length; i < l; i++) {
      const shape = shapes[i];
      data.shapes.push(shape.uuid);
    }
  } else {
    data.shapes.push(shapes.uuid);
  }
  if (options.extrudePath !== void 0)
    data.options.extrudePath = options.extrudePath.toJSON();
  return data;
}
class ShapeGeometry extends BufferGeometry {
  constructor(shapes = new Shape([new Vector2$1(0, 0.5), new Vector2$1(-0.5, -0.5), new Vector2$1(0.5, -0.5)]), curveSegments = 12) {
    super();
    this.type = "ShapeGeometry";
    this.parameters = {
      shapes,
      curveSegments
    };
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    let groupStart = 0;
    let groupCount = 0;
    if (Array.isArray(shapes) === false) {
      addShape(shapes);
    } else {
      for (let i = 0; i < shapes.length; i++) {
        addShape(shapes[i]);
        this.addGroup(groupStart, groupCount, i);
        groupStart += groupCount;
        groupCount = 0;
      }
    }
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
    function addShape(shape) {
      const indexOffset = vertices.length / 3;
      const points = shape.extractPoints(curveSegments);
      let shapeVertices = points.shape;
      const shapeHoles = points.holes;
      if (ShapeUtils.isClockWise(shapeVertices) === false) {
        shapeVertices = shapeVertices.reverse();
      }
      for (let i = 0, l = shapeHoles.length; i < l; i++) {
        const shapeHole = shapeHoles[i];
        if (ShapeUtils.isClockWise(shapeHole) === true) {
          shapeHoles[i] = shapeHole.reverse();
        }
      }
      const faces = ShapeUtils.triangulateShape(shapeVertices, shapeHoles);
      for (let i = 0, l = shapeHoles.length; i < l; i++) {
        const shapeHole = shapeHoles[i];
        shapeVertices = shapeVertices.concat(shapeHole);
      }
      for (let i = 0, l = shapeVertices.length; i < l; i++) {
        const vertex2 = shapeVertices[i];
        vertices.push(vertex2.x, vertex2.y, 0);
        normals.push(0, 0, 1);
        uvs.push(vertex2.x, vertex2.y);
      }
      for (let i = 0, l = faces.length; i < l; i++) {
        const face = faces[i];
        const a = face[0] + indexOffset;
        const b = face[1] + indexOffset;
        const c = face[2] + indexOffset;
        indices.push(a, b, c);
        groupCount += 3;
      }
    }
  }
  toJSON() {
    const data = super.toJSON();
    const shapes = this.parameters.shapes;
    return toJSON(shapes, data);
  }
  static fromJSON(data, shapes) {
    const geometryShapes = [];
    for (let j = 0, jl = data.shapes.length; j < jl; j++) {
      const shape = shapes[data.shapes[j]];
      geometryShapes.push(shape);
    }
    return new ShapeGeometry(geometryShapes, data.curveSegments);
  }
}
function toJSON(shapes, data) {
  data.shapes = [];
  if (Array.isArray(shapes)) {
    for (let i = 0, l = shapes.length; i < l; i++) {
      const shape = shapes[i];
      data.shapes.push(shape.uuid);
    }
  } else {
    data.shapes.push(shapes.uuid);
  }
  return data;
}
class ShadowMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "ShadowMaterial";
    this.color = new Color(0);
    this.transparent = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    return this;
  }
}
ShadowMaterial.prototype.isShadowMaterial = true;
class MeshStandardMaterial extends Material {
  constructor(parameters) {
    super();
    this.defines = {STANDARD: ""};
    this.type = "MeshStandardMaterial";
    this.color = new Color(16777215);
    this.roughness = 1;
    this.metalness = 0;
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2$1(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.roughnessMap = null;
    this.metalnessMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.envMapIntensity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.flatShading = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.defines = {STANDARD: ""};
    this.color.copy(source.color);
    this.roughness = source.roughness;
    this.metalness = source.metalness;
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.roughnessMap = source.roughnessMap;
    this.metalnessMap = source.metalnessMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.envMapIntensity = source.envMapIntensity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.flatShading = source.flatShading;
    return this;
  }
}
MeshStandardMaterial.prototype.isMeshStandardMaterial = true;
class MeshPhysicalMaterial extends MeshStandardMaterial {
  constructor(parameters) {
    super();
    this.defines = {
      STANDARD: "",
      PHYSICAL: ""
    };
    this.type = "MeshPhysicalMaterial";
    this.clearcoatMap = null;
    this.clearcoatRoughness = 0;
    this.clearcoatRoughnessMap = null;
    this.clearcoatNormalScale = new Vector2$1(1, 1);
    this.clearcoatNormalMap = null;
    this.ior = 1.5;
    Object.defineProperty(this, "reflectivity", {
      get: function() {
        return clamp$2(2.5 * (this.ior - 1) / (this.ior + 1), 0, 1);
      },
      set: function(reflectivity) {
        this.ior = (1 + 0.4 * reflectivity) / (1 - 0.4 * reflectivity);
      }
    });
    this.sheenColor = new Color(0);
    this.sheenColorMap = null;
    this.sheenRoughness = 1;
    this.sheenRoughnessMap = null;
    this.transmissionMap = null;
    this.thickness = 0;
    this.thicknessMap = null;
    this.attenuationDistance = 0;
    this.attenuationColor = new Color(1, 1, 1);
    this.specularIntensity = 1;
    this.specularIntensityMap = null;
    this.specularColor = new Color(1, 1, 1);
    this.specularColorMap = null;
    this._sheen = 0;
    this._clearcoat = 0;
    this._transmission = 0;
    this.setValues(parameters);
  }
  get sheen() {
    return this._sheen;
  }
  set sheen(value) {
    if (this._sheen > 0 !== value > 0) {
      this.version++;
    }
    this._sheen = value;
  }
  get clearcoat() {
    return this._clearcoat;
  }
  set clearcoat(value) {
    if (this._clearcoat > 0 !== value > 0) {
      this.version++;
    }
    this._clearcoat = value;
  }
  get transmission() {
    return this._transmission;
  }
  set transmission(value) {
    if (this._transmission > 0 !== value > 0) {
      this.version++;
    }
    this._transmission = value;
  }
  copy(source) {
    super.copy(source);
    this.defines = {
      STANDARD: "",
      PHYSICAL: ""
    };
    this.clearcoat = source.clearcoat;
    this.clearcoatMap = source.clearcoatMap;
    this.clearcoatRoughness = source.clearcoatRoughness;
    this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
    this.clearcoatNormalMap = source.clearcoatNormalMap;
    this.clearcoatNormalScale.copy(source.clearcoatNormalScale);
    this.ior = source.ior;
    this.sheen = source.sheen;
    this.sheenColor.copy(source.sheenColor);
    this.sheenColorMap = source.sheenColorMap;
    this.sheenRoughness = source.sheenRoughness;
    this.sheenRoughnessMap = source.sheenRoughnessMap;
    this.transmission = source.transmission;
    this.transmissionMap = source.transmissionMap;
    this.thickness = source.thickness;
    this.thicknessMap = source.thicknessMap;
    this.attenuationDistance = source.attenuationDistance;
    this.attenuationColor.copy(source.attenuationColor);
    this.specularIntensity = source.specularIntensity;
    this.specularIntensityMap = source.specularIntensityMap;
    this.specularColor.copy(source.specularColor);
    this.specularColorMap = source.specularColorMap;
    return this;
  }
}
MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;
class MeshPhongMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshPhongMaterial";
    this.color = new Color(16777215);
    this.specular = new Color(1118481);
    this.shininess = 30;
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2$1(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.flatShading = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.specular.copy(source.specular);
    this.shininess = source.shininess;
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.flatShading = source.flatShading;
    return this;
  }
}
MeshPhongMaterial.prototype.isMeshPhongMaterial = true;
class MeshToonMaterial extends Material {
  constructor(parameters) {
    super();
    this.defines = {TOON: ""};
    this.type = "MeshToonMaterial";
    this.color = new Color(16777215);
    this.map = null;
    this.gradientMap = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2$1(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.alphaMap = null;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.gradientMap = source.gradientMap;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.alphaMap = source.alphaMap;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    return this;
  }
}
MeshToonMaterial.prototype.isMeshToonMaterial = true;
class MeshNormalMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshNormalMaterial";
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2$1(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.fog = false;
    this.flatShading = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.flatShading = source.flatShading;
    return this;
  }
}
MeshNormalMaterial.prototype.isMeshNormalMaterial = true;
class MeshLambertMaterial extends Material {
  constructor(parameters) {
    super();
    this.type = "MeshLambertMaterial";
    this.color = new Color(16777215);
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    return this;
  }
}
MeshLambertMaterial.prototype.isMeshLambertMaterial = true;
class MeshMatcapMaterial extends Material {
  constructor(parameters) {
    super();
    this.defines = {MATCAP: ""};
    this.type = "MeshMatcapMaterial";
    this.color = new Color(16777215);
    this.matcap = null;
    this.map = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2$1(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.alphaMap = null;
    this.flatShading = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.defines = {MATCAP: ""};
    this.color.copy(source.color);
    this.matcap = source.matcap;
    this.map = source.map;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.alphaMap = source.alphaMap;
    this.flatShading = source.flatShading;
    return this;
  }
}
MeshMatcapMaterial.prototype.isMeshMatcapMaterial = true;
class LineDashedMaterial extends LineBasicMaterial {
  constructor(parameters) {
    super();
    this.type = "LineDashedMaterial";
    this.scale = 1;
    this.dashSize = 3;
    this.gapSize = 1;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.scale = source.scale;
    this.dashSize = source.dashSize;
    this.gapSize = source.gapSize;
    return this;
  }
}
LineDashedMaterial.prototype.isLineDashedMaterial = true;
const AnimationUtils = {
  arraySlice: function(array, from, to) {
    if (AnimationUtils.isTypedArray(array)) {
      return new array.constructor(array.subarray(from, to !== void 0 ? to : array.length));
    }
    return array.slice(from, to);
  },
  convertArray: function(array, type, forceClone) {
    if (!array || !forceClone && array.constructor === type)
      return array;
    if (typeof type.BYTES_PER_ELEMENT === "number") {
      return new type(array);
    }
    return Array.prototype.slice.call(array);
  },
  isTypedArray: function(object) {
    return ArrayBuffer.isView(object) && !(object instanceof DataView);
  },
  getKeyframeOrder: function(times) {
    function compareTime(i, j) {
      return times[i] - times[j];
    }
    const n = times.length;
    const result = new Array(n);
    for (let i = 0; i !== n; ++i)
      result[i] = i;
    result.sort(compareTime);
    return result;
  },
  sortedArray: function(values, stride, order) {
    const nValues = values.length;
    const result = new values.constructor(nValues);
    for (let i = 0, dstOffset = 0; dstOffset !== nValues; ++i) {
      const srcOffset = order[i] * stride;
      for (let j = 0; j !== stride; ++j) {
        result[dstOffset++] = values[srcOffset + j];
      }
    }
    return result;
  },
  flattenJSON: function(jsonKeys, times, values, valuePropertyName) {
    let i = 1, key = jsonKeys[0];
    while (key !== void 0 && key[valuePropertyName] === void 0) {
      key = jsonKeys[i++];
    }
    if (key === void 0)
      return;
    let value = key[valuePropertyName];
    if (value === void 0)
      return;
    if (Array.isArray(value)) {
      do {
        value = key[valuePropertyName];
        if (value !== void 0) {
          times.push(key.time);
          values.push.apply(values, value);
        }
        key = jsonKeys[i++];
      } while (key !== void 0);
    } else if (value.toArray !== void 0) {
      do {
        value = key[valuePropertyName];
        if (value !== void 0) {
          times.push(key.time);
          value.toArray(values, values.length);
        }
        key = jsonKeys[i++];
      } while (key !== void 0);
    } else {
      do {
        value = key[valuePropertyName];
        if (value !== void 0) {
          times.push(key.time);
          values.push(value);
        }
        key = jsonKeys[i++];
      } while (key !== void 0);
    }
  },
  subclip: function(sourceClip, name, startFrame, endFrame, fps = 30) {
    const clip = sourceClip.clone();
    clip.name = name;
    const tracks = [];
    for (let i = 0; i < clip.tracks.length; ++i) {
      const track = clip.tracks[i];
      const valueSize = track.getValueSize();
      const times = [];
      const values = [];
      for (let j = 0; j < track.times.length; ++j) {
        const frame = track.times[j] * fps;
        if (frame < startFrame || frame >= endFrame)
          continue;
        times.push(track.times[j]);
        for (let k = 0; k < valueSize; ++k) {
          values.push(track.values[j * valueSize + k]);
        }
      }
      if (times.length === 0)
        continue;
      track.times = AnimationUtils.convertArray(times, track.times.constructor);
      track.values = AnimationUtils.convertArray(values, track.values.constructor);
      tracks.push(track);
    }
    clip.tracks = tracks;
    let minStartTime = Infinity;
    for (let i = 0; i < clip.tracks.length; ++i) {
      if (minStartTime > clip.tracks[i].times[0]) {
        minStartTime = clip.tracks[i].times[0];
      }
    }
    for (let i = 0; i < clip.tracks.length; ++i) {
      clip.tracks[i].shift(-1 * minStartTime);
    }
    clip.resetDuration();
    return clip;
  },
  makeClipAdditive: function(targetClip, referenceFrame = 0, referenceClip = targetClip, fps = 30) {
    if (fps <= 0)
      fps = 30;
    const numTracks = referenceClip.tracks.length;
    const referenceTime = referenceFrame / fps;
    for (let i = 0; i < numTracks; ++i) {
      const referenceTrack = referenceClip.tracks[i];
      const referenceTrackType = referenceTrack.ValueTypeName;
      if (referenceTrackType === "bool" || referenceTrackType === "string")
        continue;
      const targetTrack = targetClip.tracks.find(function(track) {
        return track.name === referenceTrack.name && track.ValueTypeName === referenceTrackType;
      });
      if (targetTrack === void 0)
        continue;
      let referenceOffset = 0;
      const referenceValueSize = referenceTrack.getValueSize();
      if (referenceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
        referenceOffset = referenceValueSize / 3;
      }
      let targetOffset = 0;
      const targetValueSize = targetTrack.getValueSize();
      if (targetTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
        targetOffset = targetValueSize / 3;
      }
      const lastIndex = referenceTrack.times.length - 1;
      let referenceValue;
      if (referenceTime <= referenceTrack.times[0]) {
        const startIndex = referenceOffset;
        const endIndex = referenceValueSize - referenceOffset;
        referenceValue = AnimationUtils.arraySlice(referenceTrack.values, startIndex, endIndex);
      } else if (referenceTime >= referenceTrack.times[lastIndex]) {
        const startIndex = lastIndex * referenceValueSize + referenceOffset;
        const endIndex = startIndex + referenceValueSize - referenceOffset;
        referenceValue = AnimationUtils.arraySlice(referenceTrack.values, startIndex, endIndex);
      } else {
        const interpolant = referenceTrack.createInterpolant();
        const startIndex = referenceOffset;
        const endIndex = referenceValueSize - referenceOffset;
        interpolant.evaluate(referenceTime);
        referenceValue = AnimationUtils.arraySlice(interpolant.resultBuffer, startIndex, endIndex);
      }
      if (referenceTrackType === "quaternion") {
        const referenceQuat = new Quaternion$1().fromArray(referenceValue).normalize().conjugate();
        referenceQuat.toArray(referenceValue);
      }
      const numTimes = targetTrack.times.length;
      for (let j = 0; j < numTimes; ++j) {
        const valueStart = j * targetValueSize + targetOffset;
        if (referenceTrackType === "quaternion") {
          Quaternion$1.multiplyQuaternionsFlat(targetTrack.values, valueStart, referenceValue, 0, targetTrack.values, valueStart);
        } else {
          const valueEnd = targetValueSize - targetOffset * 2;
          for (let k = 0; k < valueEnd; ++k) {
            targetTrack.values[valueStart + k] -= referenceValue[k];
          }
        }
      }
    }
    targetClip.blendMode = AdditiveAnimationBlendMode;
    return targetClip;
  }
};
class Interpolant {
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    this.parameterPositions = parameterPositions;
    this._cachedIndex = 0;
    this.resultBuffer = resultBuffer !== void 0 ? resultBuffer : new sampleValues.constructor(sampleSize);
    this.sampleValues = sampleValues;
    this.valueSize = sampleSize;
    this.settings = null;
    this.DefaultSettings_ = {};
  }
  evaluate(t) {
    const pp = this.parameterPositions;
    let i1 = this._cachedIndex, t1 = pp[i1], t0 = pp[i1 - 1];
    validate_interval: {
      seek: {
        let right;
        linear_scan: {
          forward_scan:
            if (!(t < t1)) {
              for (let giveUpAt = i1 + 2; ; ) {
                if (t1 === void 0) {
                  if (t < t0)
                    break forward_scan;
                  i1 = pp.length;
                  this._cachedIndex = i1;
                  return this.afterEnd_(i1 - 1, t, t0);
                }
                if (i1 === giveUpAt)
                  break;
                t0 = t1;
                t1 = pp[++i1];
                if (t < t1) {
                  break seek;
                }
              }
              right = pp.length;
              break linear_scan;
            }
          if (!(t >= t0)) {
            const t1global = pp[1];
            if (t < t1global) {
              i1 = 2;
              t0 = t1global;
            }
            for (let giveUpAt = i1 - 2; ; ) {
              if (t0 === void 0) {
                this._cachedIndex = 0;
                return this.beforeStart_(0, t, t1);
              }
              if (i1 === giveUpAt)
                break;
              t1 = t0;
              t0 = pp[--i1 - 1];
              if (t >= t0) {
                break seek;
              }
            }
            right = i1;
            i1 = 0;
            break linear_scan;
          }
          break validate_interval;
        }
        while (i1 < right) {
          const mid = i1 + right >>> 1;
          if (t < pp[mid]) {
            right = mid;
          } else {
            i1 = mid + 1;
          }
        }
        t1 = pp[i1];
        t0 = pp[i1 - 1];
        if (t0 === void 0) {
          this._cachedIndex = 0;
          return this.beforeStart_(0, t, t1);
        }
        if (t1 === void 0) {
          i1 = pp.length;
          this._cachedIndex = i1;
          return this.afterEnd_(i1 - 1, t0, t);
        }
      }
      this._cachedIndex = i1;
      this.intervalChanged_(i1, t0, t1);
    }
    return this.interpolate_(i1, t0, t, t1);
  }
  getSettings_() {
    return this.settings || this.DefaultSettings_;
  }
  copySampleValue_(index) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, offset = index * stride;
    for (let i = 0; i !== stride; ++i) {
      result[i] = values[offset + i];
    }
    return result;
  }
  interpolate_() {
    throw new Error("call to abstract method");
  }
  intervalChanged_() {
  }
}
Interpolant.prototype.beforeStart_ = Interpolant.prototype.copySampleValue_;
Interpolant.prototype.afterEnd_ = Interpolant.prototype.copySampleValue_;
class CubicInterpolant extends Interpolant {
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
    this._weightPrev = -0;
    this._offsetPrev = -0;
    this._weightNext = -0;
    this._offsetNext = -0;
    this.DefaultSettings_ = {
      endingStart: ZeroCurvatureEnding,
      endingEnd: ZeroCurvatureEnding
    };
  }
  intervalChanged_(i1, t0, t1) {
    const pp = this.parameterPositions;
    let iPrev = i1 - 2, iNext = i1 + 1, tPrev = pp[iPrev], tNext = pp[iNext];
    if (tPrev === void 0) {
      switch (this.getSettings_().endingStart) {
        case ZeroSlopeEnding:
          iPrev = i1;
          tPrev = 2 * t0 - t1;
          break;
        case WrapAroundEnding:
          iPrev = pp.length - 2;
          tPrev = t0 + pp[iPrev] - pp[iPrev + 1];
          break;
        default:
          iPrev = i1;
          tPrev = t1;
      }
    }
    if (tNext === void 0) {
      switch (this.getSettings_().endingEnd) {
        case ZeroSlopeEnding:
          iNext = i1;
          tNext = 2 * t1 - t0;
          break;
        case WrapAroundEnding:
          iNext = 1;
          tNext = t1 + pp[1] - pp[0];
          break;
        default:
          iNext = i1 - 1;
          tNext = t0;
      }
    }
    const halfDt = (t1 - t0) * 0.5, stride = this.valueSize;
    this._weightPrev = halfDt / (t0 - tPrev);
    this._weightNext = halfDt / (tNext - t1);
    this._offsetPrev = iPrev * stride;
    this._offsetNext = iNext * stride;
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, o1 = i1 * stride, o0 = o1 - stride, oP = this._offsetPrev, oN = this._offsetNext, wP = this._weightPrev, wN = this._weightNext, p = (t - t0) / (t1 - t0), pp = p * p, ppp = pp * p;
    const sP = -wP * ppp + 2 * wP * pp - wP * p;
    const s0 = (1 + wP) * ppp + (-1.5 - 2 * wP) * pp + (-0.5 + wP) * p + 1;
    const s1 = (-1 - wN) * ppp + (1.5 + wN) * pp + 0.5 * p;
    const sN = wN * ppp - wN * pp;
    for (let i = 0; i !== stride; ++i) {
      result[i] = sP * values[oP + i] + s0 * values[o0 + i] + s1 * values[o1 + i] + sN * values[oN + i];
    }
    return result;
  }
}
class LinearInterpolant extends Interpolant {
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, offset1 = i1 * stride, offset0 = offset1 - stride, weight1 = (t - t0) / (t1 - t0), weight0 = 1 - weight1;
    for (let i = 0; i !== stride; ++i) {
      result[i] = values[offset0 + i] * weight0 + values[offset1 + i] * weight1;
    }
    return result;
  }
}
class DiscreteInterpolant extends Interpolant {
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1) {
    return this.copySampleValue_(i1 - 1);
  }
}
class KeyframeTrack {
  constructor(name, times, values, interpolation) {
    if (name === void 0)
      throw new Error("THREE.KeyframeTrack: track name is undefined");
    if (times === void 0 || times.length === 0)
      throw new Error("THREE.KeyframeTrack: no keyframes in track named " + name);
    this.name = name;
    this.times = AnimationUtils.convertArray(times, this.TimeBufferType);
    this.values = AnimationUtils.convertArray(values, this.ValueBufferType);
    this.setInterpolation(interpolation || this.DefaultInterpolation);
  }
  static toJSON(track) {
    const trackType = track.constructor;
    let json;
    if (trackType.toJSON !== this.toJSON) {
      json = trackType.toJSON(track);
    } else {
      json = {
        name: track.name,
        times: AnimationUtils.convertArray(track.times, Array),
        values: AnimationUtils.convertArray(track.values, Array)
      };
      const interpolation = track.getInterpolation();
      if (interpolation !== track.DefaultInterpolation) {
        json.interpolation = interpolation;
      }
    }
    json.type = track.ValueTypeName;
    return json;
  }
  InterpolantFactoryMethodDiscrete(result) {
    return new DiscreteInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  InterpolantFactoryMethodLinear(result) {
    return new LinearInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  InterpolantFactoryMethodSmooth(result) {
    return new CubicInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  setInterpolation(interpolation) {
    let factoryMethod;
    switch (interpolation) {
      case InterpolateDiscrete:
        factoryMethod = this.InterpolantFactoryMethodDiscrete;
        break;
      case InterpolateLinear:
        factoryMethod = this.InterpolantFactoryMethodLinear;
        break;
      case InterpolateSmooth:
        factoryMethod = this.InterpolantFactoryMethodSmooth;
        break;
    }
    if (factoryMethod === void 0) {
      const message = "unsupported interpolation for " + this.ValueTypeName + " keyframe track named " + this.name;
      if (this.createInterpolant === void 0) {
        if (interpolation !== this.DefaultInterpolation) {
          this.setInterpolation(this.DefaultInterpolation);
        } else {
          throw new Error(message);
        }
      }
      console.warn("THREE.KeyframeTrack:", message);
      return this;
    }
    this.createInterpolant = factoryMethod;
    return this;
  }
  getInterpolation() {
    switch (this.createInterpolant) {
      case this.InterpolantFactoryMethodDiscrete:
        return InterpolateDiscrete;
      case this.InterpolantFactoryMethodLinear:
        return InterpolateLinear;
      case this.InterpolantFactoryMethodSmooth:
        return InterpolateSmooth;
    }
  }
  getValueSize() {
    return this.values.length / this.times.length;
  }
  shift(timeOffset) {
    if (timeOffset !== 0) {
      const times = this.times;
      for (let i = 0, n = times.length; i !== n; ++i) {
        times[i] += timeOffset;
      }
    }
    return this;
  }
  scale(timeScale) {
    if (timeScale !== 1) {
      const times = this.times;
      for (let i = 0, n = times.length; i !== n; ++i) {
        times[i] *= timeScale;
      }
    }
    return this;
  }
  trim(startTime, endTime) {
    const times = this.times, nKeys = times.length;
    let from = 0, to = nKeys - 1;
    while (from !== nKeys && times[from] < startTime) {
      ++from;
    }
    while (to !== -1 && times[to] > endTime) {
      --to;
    }
    ++to;
    if (from !== 0 || to !== nKeys) {
      if (from >= to) {
        to = Math.max(to, 1);
        from = to - 1;
      }
      const stride = this.getValueSize();
      this.times = AnimationUtils.arraySlice(times, from, to);
      this.values = AnimationUtils.arraySlice(this.values, from * stride, to * stride);
    }
    return this;
  }
  validate() {
    let valid = true;
    const valueSize = this.getValueSize();
    if (valueSize - Math.floor(valueSize) !== 0) {
      console.error("THREE.KeyframeTrack: Invalid value size in track.", this);
      valid = false;
    }
    const times = this.times, values = this.values, nKeys = times.length;
    if (nKeys === 0) {
      console.error("THREE.KeyframeTrack: Track is empty.", this);
      valid = false;
    }
    let prevTime = null;
    for (let i = 0; i !== nKeys; i++) {
      const currTime = times[i];
      if (typeof currTime === "number" && isNaN(currTime)) {
        console.error("THREE.KeyframeTrack: Time is not a valid number.", this, i, currTime);
        valid = false;
        break;
      }
      if (prevTime !== null && prevTime > currTime) {
        console.error("THREE.KeyframeTrack: Out of order keys.", this, i, currTime, prevTime);
        valid = false;
        break;
      }
      prevTime = currTime;
    }
    if (values !== void 0) {
      if (AnimationUtils.isTypedArray(values)) {
        for (let i = 0, n = values.length; i !== n; ++i) {
          const value = values[i];
          if (isNaN(value)) {
            console.error("THREE.KeyframeTrack: Value is not a valid number.", this, i, value);
            valid = false;
            break;
          }
        }
      }
    }
    return valid;
  }
  optimize() {
    const times = AnimationUtils.arraySlice(this.times), values = AnimationUtils.arraySlice(this.values), stride = this.getValueSize(), smoothInterpolation = this.getInterpolation() === InterpolateSmooth, lastIndex = times.length - 1;
    let writeIndex = 1;
    for (let i = 1; i < lastIndex; ++i) {
      let keep = false;
      const time = times[i];
      const timeNext = times[i + 1];
      if (time !== timeNext && (i !== 1 || time !== times[0])) {
        if (!smoothInterpolation) {
          const offset = i * stride, offsetP = offset - stride, offsetN = offset + stride;
          for (let j = 0; j !== stride; ++j) {
            const value = values[offset + j];
            if (value !== values[offsetP + j] || value !== values[offsetN + j]) {
              keep = true;
              break;
            }
          }
        } else {
          keep = true;
        }
      }
      if (keep) {
        if (i !== writeIndex) {
          times[writeIndex] = times[i];
          const readOffset = i * stride, writeOffset = writeIndex * stride;
          for (let j = 0; j !== stride; ++j) {
            values[writeOffset + j] = values[readOffset + j];
          }
        }
        ++writeIndex;
      }
    }
    if (lastIndex > 0) {
      times[writeIndex] = times[lastIndex];
      for (let readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++j) {
        values[writeOffset + j] = values[readOffset + j];
      }
      ++writeIndex;
    }
    if (writeIndex !== times.length) {
      this.times = AnimationUtils.arraySlice(times, 0, writeIndex);
      this.values = AnimationUtils.arraySlice(values, 0, writeIndex * stride);
    } else {
      this.times = times;
      this.values = values;
    }
    return this;
  }
  clone() {
    const times = AnimationUtils.arraySlice(this.times, 0);
    const values = AnimationUtils.arraySlice(this.values, 0);
    const TypedKeyframeTrack = this.constructor;
    const track = new TypedKeyframeTrack(this.name, times, values);
    track.createInterpolant = this.createInterpolant;
    return track;
  }
}
KeyframeTrack.prototype.TimeBufferType = Float32Array;
KeyframeTrack.prototype.ValueBufferType = Float32Array;
KeyframeTrack.prototype.DefaultInterpolation = InterpolateLinear;
class BooleanKeyframeTrack extends KeyframeTrack {
}
BooleanKeyframeTrack.prototype.ValueTypeName = "bool";
BooleanKeyframeTrack.prototype.ValueBufferType = Array;
BooleanKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
BooleanKeyframeTrack.prototype.InterpolantFactoryMethodLinear = void 0;
BooleanKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class ColorKeyframeTrack extends KeyframeTrack {
}
ColorKeyframeTrack.prototype.ValueTypeName = "color";
class NumberKeyframeTrack extends KeyframeTrack {
}
NumberKeyframeTrack.prototype.ValueTypeName = "number";
class QuaternionLinearInterpolant extends Interpolant {
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, alpha = (t - t0) / (t1 - t0);
    let offset = i1 * stride;
    for (let end = offset + stride; offset !== end; offset += 4) {
      Quaternion$1.slerpFlat(result, 0, values, offset - stride, values, offset, alpha);
    }
    return result;
  }
}
class QuaternionKeyframeTrack extends KeyframeTrack {
  InterpolantFactoryMethodLinear(result) {
    return new QuaternionLinearInterpolant(this.times, this.values, this.getValueSize(), result);
  }
}
QuaternionKeyframeTrack.prototype.ValueTypeName = "quaternion";
QuaternionKeyframeTrack.prototype.DefaultInterpolation = InterpolateLinear;
QuaternionKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class StringKeyframeTrack extends KeyframeTrack {
}
StringKeyframeTrack.prototype.ValueTypeName = "string";
StringKeyframeTrack.prototype.ValueBufferType = Array;
StringKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
StringKeyframeTrack.prototype.InterpolantFactoryMethodLinear = void 0;
StringKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class VectorKeyframeTrack extends KeyframeTrack {
}
VectorKeyframeTrack.prototype.ValueTypeName = "vector";
class AnimationClip {
  constructor(name, duration = -1, tracks, blendMode = NormalAnimationBlendMode) {
    this.name = name;
    this.tracks = tracks;
    this.duration = duration;
    this.blendMode = blendMode;
    this.uuid = generateUUID();
    if (this.duration < 0) {
      this.resetDuration();
    }
  }
  static parse(json) {
    const tracks = [], jsonTracks = json.tracks, frameTime = 1 / (json.fps || 1);
    for (let i = 0, n = jsonTracks.length; i !== n; ++i) {
      tracks.push(parseKeyframeTrack(jsonTracks[i]).scale(frameTime));
    }
    const clip = new this(json.name, json.duration, tracks, json.blendMode);
    clip.uuid = json.uuid;
    return clip;
  }
  static toJSON(clip) {
    const tracks = [], clipTracks = clip.tracks;
    const json = {
      name: clip.name,
      duration: clip.duration,
      tracks,
      uuid: clip.uuid,
      blendMode: clip.blendMode
    };
    for (let i = 0, n = clipTracks.length; i !== n; ++i) {
      tracks.push(KeyframeTrack.toJSON(clipTracks[i]));
    }
    return json;
  }
  static CreateFromMorphTargetSequence(name, morphTargetSequence, fps, noLoop) {
    const numMorphTargets = morphTargetSequence.length;
    const tracks = [];
    for (let i = 0; i < numMorphTargets; i++) {
      let times = [];
      let values = [];
      times.push((i + numMorphTargets - 1) % numMorphTargets, i, (i + 1) % numMorphTargets);
      values.push(0, 1, 0);
      const order = AnimationUtils.getKeyframeOrder(times);
      times = AnimationUtils.sortedArray(times, 1, order);
      values = AnimationUtils.sortedArray(values, 1, order);
      if (!noLoop && times[0] === 0) {
        times.push(numMorphTargets);
        values.push(values[0]);
      }
      tracks.push(new NumberKeyframeTrack(".morphTargetInfluences[" + morphTargetSequence[i].name + "]", times, values).scale(1 / fps));
    }
    return new this(name, -1, tracks);
  }
  static findByName(objectOrClipArray, name) {
    let clipArray = objectOrClipArray;
    if (!Array.isArray(objectOrClipArray)) {
      const o = objectOrClipArray;
      clipArray = o.geometry && o.geometry.animations || o.animations;
    }
    for (let i = 0; i < clipArray.length; i++) {
      if (clipArray[i].name === name) {
        return clipArray[i];
      }
    }
    return null;
  }
  static CreateClipsFromMorphTargetSequences(morphTargets, fps, noLoop) {
    const animationToMorphTargets = {};
    const pattern = /^([\w-]*?)([\d]+)$/;
    for (let i = 0, il = morphTargets.length; i < il; i++) {
      const morphTarget = morphTargets[i];
      const parts = morphTarget.name.match(pattern);
      if (parts && parts.length > 1) {
        const name = parts[1];
        let animationMorphTargets = animationToMorphTargets[name];
        if (!animationMorphTargets) {
          animationToMorphTargets[name] = animationMorphTargets = [];
        }
        animationMorphTargets.push(morphTarget);
      }
    }
    const clips = [];
    for (const name in animationToMorphTargets) {
      clips.push(this.CreateFromMorphTargetSequence(name, animationToMorphTargets[name], fps, noLoop));
    }
    return clips;
  }
  static parseAnimation(animation, bones) {
    if (!animation) {
      console.error("THREE.AnimationClip: No animation in JSONLoader data.");
      return null;
    }
    const addNonemptyTrack = function(trackType, trackName, animationKeys, propertyName, destTracks) {
      if (animationKeys.length !== 0) {
        const times = [];
        const values = [];
        AnimationUtils.flattenJSON(animationKeys, times, values, propertyName);
        if (times.length !== 0) {
          destTracks.push(new trackType(trackName, times, values));
        }
      }
    };
    const tracks = [];
    const clipName = animation.name || "default";
    const fps = animation.fps || 30;
    const blendMode = animation.blendMode;
    let duration = animation.length || -1;
    const hierarchyTracks = animation.hierarchy || [];
    for (let h = 0; h < hierarchyTracks.length; h++) {
      const animationKeys = hierarchyTracks[h].keys;
      if (!animationKeys || animationKeys.length === 0)
        continue;
      if (animationKeys[0].morphTargets) {
        const morphTargetNames = {};
        let k;
        for (k = 0; k < animationKeys.length; k++) {
          if (animationKeys[k].morphTargets) {
            for (let m = 0; m < animationKeys[k].morphTargets.length; m++) {
              morphTargetNames[animationKeys[k].morphTargets[m]] = -1;
            }
          }
        }
        for (const morphTargetName in morphTargetNames) {
          const times = [];
          const values = [];
          for (let m = 0; m !== animationKeys[k].morphTargets.length; ++m) {
            const animationKey = animationKeys[k];
            times.push(animationKey.time);
            values.push(animationKey.morphTarget === morphTargetName ? 1 : 0);
          }
          tracks.push(new NumberKeyframeTrack(".morphTargetInfluence[" + morphTargetName + "]", times, values));
        }
        duration = morphTargetNames.length * (fps || 1);
      } else {
        const boneName = ".bones[" + bones[h].name + "]";
        addNonemptyTrack(VectorKeyframeTrack, boneName + ".position", animationKeys, "pos", tracks);
        addNonemptyTrack(QuaternionKeyframeTrack, boneName + ".quaternion", animationKeys, "rot", tracks);
        addNonemptyTrack(VectorKeyframeTrack, boneName + ".scale", animationKeys, "scl", tracks);
      }
    }
    if (tracks.length === 0) {
      return null;
    }
    const clip = new this(clipName, duration, tracks, blendMode);
    return clip;
  }
  resetDuration() {
    const tracks = this.tracks;
    let duration = 0;
    for (let i = 0, n = tracks.length; i !== n; ++i) {
      const track = this.tracks[i];
      duration = Math.max(duration, track.times[track.times.length - 1]);
    }
    this.duration = duration;
    return this;
  }
  trim() {
    for (let i = 0; i < this.tracks.length; i++) {
      this.tracks[i].trim(0, this.duration);
    }
    return this;
  }
  validate() {
    let valid = true;
    for (let i = 0; i < this.tracks.length; i++) {
      valid = valid && this.tracks[i].validate();
    }
    return valid;
  }
  optimize() {
    for (let i = 0; i < this.tracks.length; i++) {
      this.tracks[i].optimize();
    }
    return this;
  }
  clone() {
    const tracks = [];
    for (let i = 0; i < this.tracks.length; i++) {
      tracks.push(this.tracks[i].clone());
    }
    return new this.constructor(this.name, this.duration, tracks, this.blendMode);
  }
  toJSON() {
    return this.constructor.toJSON(this);
  }
}
function getTrackTypeForValueTypeName(typeName) {
  switch (typeName.toLowerCase()) {
    case "scalar":
    case "double":
    case "float":
    case "number":
    case "integer":
      return NumberKeyframeTrack;
    case "vector":
    case "vector2":
    case "vector3":
    case "vector4":
      return VectorKeyframeTrack;
    case "color":
      return ColorKeyframeTrack;
    case "quaternion":
      return QuaternionKeyframeTrack;
    case "bool":
    case "boolean":
      return BooleanKeyframeTrack;
    case "string":
      return StringKeyframeTrack;
  }
  throw new Error("THREE.KeyframeTrack: Unsupported typeName: " + typeName);
}
function parseKeyframeTrack(json) {
  if (json.type === void 0) {
    throw new Error("THREE.KeyframeTrack: track type undefined, can not parse");
  }
  const trackType = getTrackTypeForValueTypeName(json.type);
  if (json.times === void 0) {
    const times = [], values = [];
    AnimationUtils.flattenJSON(json.keys, times, values, "value");
    json.times = times;
    json.values = values;
  }
  if (trackType.parse !== void 0) {
    return trackType.parse(json);
  } else {
    return new trackType(json.name, json.times, json.values, json.interpolation);
  }
}
const Cache = {
  enabled: false,
  files: {},
  add: function(key, file) {
    if (this.enabled === false)
      return;
    this.files[key] = file;
  },
  get: function(key) {
    if (this.enabled === false)
      return;
    return this.files[key];
  },
  remove: function(key) {
    delete this.files[key];
  },
  clear: function() {
    this.files = {};
  }
};
class LoadingManager {
  constructor(onLoad, onProgress, onError) {
    const scope = this;
    let isLoading = false;
    let itemsLoaded = 0;
    let itemsTotal = 0;
    let urlModifier = void 0;
    const handlers = [];
    this.onStart = void 0;
    this.onLoad = onLoad;
    this.onProgress = onProgress;
    this.onError = onError;
    this.itemStart = function(url) {
      itemsTotal++;
      if (isLoading === false) {
        if (scope.onStart !== void 0) {
          scope.onStart(url, itemsLoaded, itemsTotal);
        }
      }
      isLoading = true;
    };
    this.itemEnd = function(url) {
      itemsLoaded++;
      if (scope.onProgress !== void 0) {
        scope.onProgress(url, itemsLoaded, itemsTotal);
      }
      if (itemsLoaded === itemsTotal) {
        isLoading = false;
        if (scope.onLoad !== void 0) {
          scope.onLoad();
        }
      }
    };
    this.itemError = function(url) {
      if (scope.onError !== void 0) {
        scope.onError(url);
      }
    };
    this.resolveURL = function(url) {
      if (urlModifier) {
        return urlModifier(url);
      }
      return url;
    };
    this.setURLModifier = function(transform) {
      urlModifier = transform;
      return this;
    };
    this.addHandler = function(regex, loader) {
      handlers.push(regex, loader);
      return this;
    };
    this.removeHandler = function(regex) {
      const index = handlers.indexOf(regex);
      if (index !== -1) {
        handlers.splice(index, 2);
      }
      return this;
    };
    this.getHandler = function(file) {
      for (let i = 0, l = handlers.length; i < l; i += 2) {
        const regex = handlers[i];
        const loader = handlers[i + 1];
        if (regex.global)
          regex.lastIndex = 0;
        if (regex.test(file)) {
          return loader;
        }
      }
      return null;
    };
  }
}
const DefaultLoadingManager = new LoadingManager();
class Loader {
  constructor(manager) {
    this.manager = manager !== void 0 ? manager : DefaultLoadingManager;
    this.crossOrigin = "anonymous";
    this.withCredentials = false;
    this.path = "";
    this.resourcePath = "";
    this.requestHeader = {};
  }
  load() {
  }
  loadAsync(url, onProgress) {
    const scope = this;
    return new Promise(function(resolve, reject) {
      scope.load(url, resolve, onProgress, reject);
    });
  }
  parse() {
  }
  setCrossOrigin(crossOrigin) {
    this.crossOrigin = crossOrigin;
    return this;
  }
  setWithCredentials(value) {
    this.withCredentials = value;
    return this;
  }
  setPath(path) {
    this.path = path;
    return this;
  }
  setResourcePath(resourcePath) {
    this.resourcePath = resourcePath;
    return this;
  }
  setRequestHeader(requestHeader) {
    this.requestHeader = requestHeader;
    return this;
  }
}
const loading = {};
class FileLoader extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    if (url === void 0)
      url = "";
    if (this.path !== void 0)
      url = this.path + url;
    url = this.manager.resolveURL(url);
    const cached = Cache.get(url);
    if (cached !== void 0) {
      this.manager.itemStart(url);
      setTimeout(() => {
        if (onLoad)
          onLoad(cached);
        this.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    if (loading[url] !== void 0) {
      loading[url].push({
        onLoad,
        onProgress,
        onError
      });
      return;
    }
    loading[url] = [];
    loading[url].push({
      onLoad,
      onProgress,
      onError
    });
    const req = new Request(url, {
      headers: new Headers(this.requestHeader),
      credentials: this.withCredentials ? "include" : "same-origin"
    });
    const mimeType = this.mimeType;
    const responseType = this.responseType;
    fetch(req).then((response) => {
      if (response.status === 200 || response.status === 0) {
        if (response.status === 0) {
          console.warn("THREE.FileLoader: HTTP Status 0 received.");
        }
        if (typeof ReadableStream === "undefined" || response.body.getReader === void 0) {
          return response;
        }
        const callbacks = loading[url];
        const reader = response.body.getReader();
        const contentLength = response.headers.get("Content-Length");
        const total = contentLength ? parseInt(contentLength) : 0;
        const lengthComputable = total !== 0;
        let loaded = 0;
        const stream = new ReadableStream({
          start(controller) {
            readData();
            function readData() {
              reader.read().then(({done, value}) => {
                if (done) {
                  controller.close();
                } else {
                  loaded += value.byteLength;
                  const event = new ProgressEvent("progress", {lengthComputable, loaded, total});
                  for (let i = 0, il = callbacks.length; i < il; i++) {
                    const callback = callbacks[i];
                    if (callback.onProgress)
                      callback.onProgress(event);
                  }
                  controller.enqueue(value);
                  readData();
                }
              });
            }
          }
        });
        return new Response(stream);
      } else {
        throw Error(`fetch for "${response.url}" responded with ${response.status}: ${response.statusText}`);
      }
    }).then((response) => {
      switch (responseType) {
        case "arraybuffer":
          return response.arrayBuffer();
        case "blob":
          return response.blob();
        case "document":
          return response.text().then((text) => {
            const parser = new DOMParser();
            return parser.parseFromString(text, mimeType);
          });
        case "json":
          return response.json();
        default:
          if (mimeType === void 0) {
            return response.text();
          } else {
            const re = /charset="?([^;"\s]*)"?/i;
            const exec = re.exec(mimeType);
            const label = exec && exec[1] ? exec[1].toLowerCase() : void 0;
            const decoder = new TextDecoder(label);
            return response.arrayBuffer().then((ab) => decoder.decode(ab));
          }
      }
    }).then((data) => {
      Cache.add(url, data);
      const callbacks = loading[url];
      delete loading[url];
      for (let i = 0, il = callbacks.length; i < il; i++) {
        const callback = callbacks[i];
        if (callback.onLoad)
          callback.onLoad(data);
      }
    }).catch((err) => {
      const callbacks = loading[url];
      if (callbacks === void 0) {
        this.manager.itemError(url);
        throw err;
      }
      delete loading[url];
      for (let i = 0, il = callbacks.length; i < il; i++) {
        const callback = callbacks[i];
        if (callback.onError)
          callback.onError(err);
      }
      this.manager.itemError(url);
    }).finally(() => {
      this.manager.itemEnd(url);
    });
    this.manager.itemStart(url);
  }
  setResponseType(value) {
    this.responseType = value;
    return this;
  }
  setMimeType(value) {
    this.mimeType = value;
    return this;
  }
}
class ImageLoader$1 extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    if (this.path !== void 0)
      url = this.path + url;
    url = this.manager.resolveURL(url);
    const scope = this;
    const cached = Cache.get(url);
    if (cached !== void 0) {
      scope.manager.itemStart(url);
      setTimeout(function() {
        if (onLoad)
          onLoad(cached);
        scope.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    const image = createElementNS("img");
    function onImageLoad() {
      removeEventListeners();
      Cache.add(url, this);
      if (onLoad)
        onLoad(this);
      scope.manager.itemEnd(url);
    }
    function onImageError(event) {
      removeEventListeners();
      if (onError)
        onError(event);
      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    }
    function removeEventListeners() {
      image.removeEventListener("load", onImageLoad, false);
      image.removeEventListener("error", onImageError, false);
    }
    image.addEventListener("load", onImageLoad, false);
    image.addEventListener("error", onImageError, false);
    if (url.substr(0, 5) !== "data:") {
      if (this.crossOrigin !== void 0)
        image.crossOrigin = this.crossOrigin;
    }
    scope.manager.itemStart(url);
    image.src = url;
    return image;
  }
}
class CubeTextureLoader extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(urls, onLoad, onProgress, onError) {
    const texture = new CubeTexture();
    const loader = new ImageLoader$1(this.manager);
    loader.setCrossOrigin(this.crossOrigin);
    loader.setPath(this.path);
    let loaded = 0;
    function loadTexture(i) {
      loader.load(urls[i], function(image) {
        texture.images[i] = image;
        loaded++;
        if (loaded === 6) {
          texture.needsUpdate = true;
          if (onLoad)
            onLoad(texture);
        }
      }, void 0, onError);
    }
    for (let i = 0; i < urls.length; ++i) {
      loadTexture(i);
    }
    return texture;
  }
}
class TextureLoader extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const texture = new Texture();
    const loader = new ImageLoader$1(this.manager);
    loader.setCrossOrigin(this.crossOrigin);
    loader.setPath(this.path);
    loader.load(url, function(image) {
      texture.image = image;
      texture.needsUpdate = true;
      if (onLoad !== void 0) {
        onLoad(texture);
      }
    }, onProgress, onError);
    return texture;
  }
}
class Light extends Object3D {
  constructor(color, intensity = 1) {
    super();
    this.type = "Light";
    this.color = new Color(color);
    this.intensity = intensity;
  }
  dispose() {
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.intensity = source.intensity;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.color = this.color.getHex();
    data.object.intensity = this.intensity;
    if (this.groundColor !== void 0)
      data.object.groundColor = this.groundColor.getHex();
    if (this.distance !== void 0)
      data.object.distance = this.distance;
    if (this.angle !== void 0)
      data.object.angle = this.angle;
    if (this.decay !== void 0)
      data.object.decay = this.decay;
    if (this.penumbra !== void 0)
      data.object.penumbra = this.penumbra;
    if (this.shadow !== void 0)
      data.object.shadow = this.shadow.toJSON();
    return data;
  }
}
Light.prototype.isLight = true;
class HemisphereLight extends Light {
  constructor(skyColor, groundColor, intensity) {
    super(skyColor, intensity);
    this.type = "HemisphereLight";
    this.position.copy(Object3D.DefaultUp);
    this.updateMatrix();
    this.groundColor = new Color(groundColor);
  }
  copy(source) {
    Light.prototype.copy.call(this, source);
    this.groundColor.copy(source.groundColor);
    return this;
  }
}
HemisphereLight.prototype.isHemisphereLight = true;
const _projScreenMatrix$1 = /* @__PURE__ */ new Matrix4$1();
const _lightPositionWorld$1 = /* @__PURE__ */ new Vector3$1();
const _lookTarget$1 = /* @__PURE__ */ new Vector3$1();
class LightShadow {
  constructor(camera) {
    this.camera = camera;
    this.bias = 0;
    this.normalBias = 0;
    this.radius = 1;
    this.blurSamples = 8;
    this.mapSize = new Vector2$1(512, 512);
    this.map = null;
    this.mapPass = null;
    this.matrix = new Matrix4$1();
    this.autoUpdate = true;
    this.needsUpdate = false;
    this._frustum = new Frustum();
    this._frameExtents = new Vector2$1(1, 1);
    this._viewportCount = 1;
    this._viewports = [
      new Vector4$1(0, 0, 1, 1)
    ];
  }
  getViewportCount() {
    return this._viewportCount;
  }
  getFrustum() {
    return this._frustum;
  }
  updateMatrices(light) {
    const shadowCamera = this.camera;
    const shadowMatrix = this.matrix;
    _lightPositionWorld$1.setFromMatrixPosition(light.matrixWorld);
    shadowCamera.position.copy(_lightPositionWorld$1);
    _lookTarget$1.setFromMatrixPosition(light.target.matrixWorld);
    shadowCamera.lookAt(_lookTarget$1);
    shadowCamera.updateMatrixWorld();
    _projScreenMatrix$1.multiplyMatrices(shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse);
    this._frustum.setFromProjectionMatrix(_projScreenMatrix$1);
    shadowMatrix.set(0.5, 0, 0, 0.5, 0, 0.5, 0, 0.5, 0, 0, 0.5, 0.5, 0, 0, 0, 1);
    shadowMatrix.multiply(shadowCamera.projectionMatrix);
    shadowMatrix.multiply(shadowCamera.matrixWorldInverse);
  }
  getViewport(viewportIndex) {
    return this._viewports[viewportIndex];
  }
  getFrameExtents() {
    return this._frameExtents;
  }
  dispose() {
    if (this.map) {
      this.map.dispose();
    }
    if (this.mapPass) {
      this.mapPass.dispose();
    }
  }
  copy(source) {
    this.camera = source.camera.clone();
    this.bias = source.bias;
    this.radius = source.radius;
    this.mapSize.copy(source.mapSize);
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  toJSON() {
    const object = {};
    if (this.bias !== 0)
      object.bias = this.bias;
    if (this.normalBias !== 0)
      object.normalBias = this.normalBias;
    if (this.radius !== 1)
      object.radius = this.radius;
    if (this.mapSize.x !== 512 || this.mapSize.y !== 512)
      object.mapSize = this.mapSize.toArray();
    object.camera = this.camera.toJSON(false).object;
    delete object.camera.matrix;
    return object;
  }
}
class SpotLightShadow extends LightShadow {
  constructor() {
    super(new PerspectiveCamera(50, 1, 0.5, 500));
    this.focus = 1;
  }
  updateMatrices(light) {
    const camera = this.camera;
    const fov2 = RAD2DEG * 2 * light.angle * this.focus;
    const aspect2 = this.mapSize.width / this.mapSize.height;
    const far = light.distance || camera.far;
    if (fov2 !== camera.fov || aspect2 !== camera.aspect || far !== camera.far) {
      camera.fov = fov2;
      camera.aspect = aspect2;
      camera.far = far;
      camera.updateProjectionMatrix();
    }
    super.updateMatrices(light);
  }
  copy(source) {
    super.copy(source);
    this.focus = source.focus;
    return this;
  }
}
SpotLightShadow.prototype.isSpotLightShadow = true;
class SpotLight extends Light {
  constructor(color, intensity, distance = 0, angle = Math.PI / 3, penumbra = 0, decay = 1) {
    super(color, intensity);
    this.type = "SpotLight";
    this.position.copy(Object3D.DefaultUp);
    this.updateMatrix();
    this.target = new Object3D();
    this.distance = distance;
    this.angle = angle;
    this.penumbra = penumbra;
    this.decay = decay;
    this.shadow = new SpotLightShadow();
  }
  get power() {
    return this.intensity * Math.PI;
  }
  set power(power) {
    this.intensity = power / Math.PI;
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source) {
    super.copy(source);
    this.distance = source.distance;
    this.angle = source.angle;
    this.penumbra = source.penumbra;
    this.decay = source.decay;
    this.target = source.target.clone();
    this.shadow = source.shadow.clone();
    return this;
  }
}
SpotLight.prototype.isSpotLight = true;
const _projScreenMatrix = /* @__PURE__ */ new Matrix4$1();
const _lightPositionWorld = /* @__PURE__ */ new Vector3$1();
const _lookTarget = /* @__PURE__ */ new Vector3$1();
class PointLightShadow extends LightShadow {
  constructor() {
    super(new PerspectiveCamera(90, 1, 0.5, 500));
    this._frameExtents = new Vector2$1(4, 2);
    this._viewportCount = 6;
    this._viewports = [
      new Vector4$1(2, 1, 1, 1),
      new Vector4$1(0, 1, 1, 1),
      new Vector4$1(3, 1, 1, 1),
      new Vector4$1(1, 1, 1, 1),
      new Vector4$1(3, 0, 1, 1),
      new Vector4$1(1, 0, 1, 1)
    ];
    this._cubeDirections = [
      new Vector3$1(1, 0, 0),
      new Vector3$1(-1, 0, 0),
      new Vector3$1(0, 0, 1),
      new Vector3$1(0, 0, -1),
      new Vector3$1(0, 1, 0),
      new Vector3$1(0, -1, 0)
    ];
    this._cubeUps = [
      new Vector3$1(0, 1, 0),
      new Vector3$1(0, 1, 0),
      new Vector3$1(0, 1, 0),
      new Vector3$1(0, 1, 0),
      new Vector3$1(0, 0, 1),
      new Vector3$1(0, 0, -1)
    ];
  }
  updateMatrices(light, viewportIndex = 0) {
    const camera = this.camera;
    const shadowMatrix = this.matrix;
    const far = light.distance || camera.far;
    if (far !== camera.far) {
      camera.far = far;
      camera.updateProjectionMatrix();
    }
    _lightPositionWorld.setFromMatrixPosition(light.matrixWorld);
    camera.position.copy(_lightPositionWorld);
    _lookTarget.copy(camera.position);
    _lookTarget.add(this._cubeDirections[viewportIndex]);
    camera.up.copy(this._cubeUps[viewportIndex]);
    camera.lookAt(_lookTarget);
    camera.updateMatrixWorld();
    shadowMatrix.makeTranslation(-_lightPositionWorld.x, -_lightPositionWorld.y, -_lightPositionWorld.z);
    _projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
    this._frustum.setFromProjectionMatrix(_projScreenMatrix);
  }
}
PointLightShadow.prototype.isPointLightShadow = true;
class PointLight extends Light {
  constructor(color, intensity, distance = 0, decay = 1) {
    super(color, intensity);
    this.type = "PointLight";
    this.distance = distance;
    this.decay = decay;
    this.shadow = new PointLightShadow();
  }
  get power() {
    return this.intensity * 4 * Math.PI;
  }
  set power(power) {
    this.intensity = power / (4 * Math.PI);
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source) {
    super.copy(source);
    this.distance = source.distance;
    this.decay = source.decay;
    this.shadow = source.shadow.clone();
    return this;
  }
}
PointLight.prototype.isPointLight = true;
class DirectionalLightShadow extends LightShadow {
  constructor() {
    super(new OrthographicCamera(-5, 5, 5, -5, 0.5, 500));
  }
}
DirectionalLightShadow.prototype.isDirectionalLightShadow = true;
class DirectionalLight extends Light {
  constructor(color, intensity) {
    super(color, intensity);
    this.type = "DirectionalLight";
    this.position.copy(Object3D.DefaultUp);
    this.updateMatrix();
    this.target = new Object3D();
    this.shadow = new DirectionalLightShadow();
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source) {
    super.copy(source);
    this.target = source.target.clone();
    this.shadow = source.shadow.clone();
    return this;
  }
}
DirectionalLight.prototype.isDirectionalLight = true;
class AmbientLight extends Light {
  constructor(color, intensity) {
    super(color, intensity);
    this.type = "AmbientLight";
  }
}
AmbientLight.prototype.isAmbientLight = true;
class RectAreaLight extends Light {
  constructor(color, intensity, width = 10, height = 10) {
    super(color, intensity);
    this.type = "RectAreaLight";
    this.width = width;
    this.height = height;
  }
  get power() {
    return this.intensity * this.width * this.height * Math.PI;
  }
  set power(power) {
    this.intensity = power / (this.width * this.height * Math.PI);
  }
  copy(source) {
    super.copy(source);
    this.width = source.width;
    this.height = source.height;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.width = this.width;
    data.object.height = this.height;
    return data;
  }
}
RectAreaLight.prototype.isRectAreaLight = true;
class SphericalHarmonics3 {
  constructor() {
    this.coefficients = [];
    for (let i = 0; i < 9; i++) {
      this.coefficients.push(new Vector3$1());
    }
  }
  set(coefficients) {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].copy(coefficients[i]);
    }
    return this;
  }
  zero() {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].set(0, 0, 0);
    }
    return this;
  }
  getAt(normal, target) {
    const x = normal.x, y = normal.y, z = normal.z;
    const coeff = this.coefficients;
    target.copy(coeff[0]).multiplyScalar(0.282095);
    target.addScaledVector(coeff[1], 0.488603 * y);
    target.addScaledVector(coeff[2], 0.488603 * z);
    target.addScaledVector(coeff[3], 0.488603 * x);
    target.addScaledVector(coeff[4], 1.092548 * (x * y));
    target.addScaledVector(coeff[5], 1.092548 * (y * z));
    target.addScaledVector(coeff[6], 0.315392 * (3 * z * z - 1));
    target.addScaledVector(coeff[7], 1.092548 * (x * z));
    target.addScaledVector(coeff[8], 0.546274 * (x * x - y * y));
    return target;
  }
  getIrradianceAt(normal, target) {
    const x = normal.x, y = normal.y, z = normal.z;
    const coeff = this.coefficients;
    target.copy(coeff[0]).multiplyScalar(0.886227);
    target.addScaledVector(coeff[1], 2 * 0.511664 * y);
    target.addScaledVector(coeff[2], 2 * 0.511664 * z);
    target.addScaledVector(coeff[3], 2 * 0.511664 * x);
    target.addScaledVector(coeff[4], 2 * 0.429043 * x * y);
    target.addScaledVector(coeff[5], 2 * 0.429043 * y * z);
    target.addScaledVector(coeff[6], 0.743125 * z * z - 0.247708);
    target.addScaledVector(coeff[7], 2 * 0.429043 * x * z);
    target.addScaledVector(coeff[8], 0.429043 * (x * x - y * y));
    return target;
  }
  add(sh) {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].add(sh.coefficients[i]);
    }
    return this;
  }
  addScaledSH(sh, s) {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].addScaledVector(sh.coefficients[i], s);
    }
    return this;
  }
  scale(s) {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].multiplyScalar(s);
    }
    return this;
  }
  lerp(sh, alpha) {
    for (let i = 0; i < 9; i++) {
      this.coefficients[i].lerp(sh.coefficients[i], alpha);
    }
    return this;
  }
  equals(sh) {
    for (let i = 0; i < 9; i++) {
      if (!this.coefficients[i].equals(sh.coefficients[i])) {
        return false;
      }
    }
    return true;
  }
  copy(sh) {
    return this.set(sh.coefficients);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  fromArray(array, offset = 0) {
    const coefficients = this.coefficients;
    for (let i = 0; i < 9; i++) {
      coefficients[i].fromArray(array, offset + i * 3);
    }
    return this;
  }
  toArray(array = [], offset = 0) {
    const coefficients = this.coefficients;
    for (let i = 0; i < 9; i++) {
      coefficients[i].toArray(array, offset + i * 3);
    }
    return array;
  }
  static getBasisAt(normal, shBasis) {
    const x = normal.x, y = normal.y, z = normal.z;
    shBasis[0] = 0.282095;
    shBasis[1] = 0.488603 * y;
    shBasis[2] = 0.488603 * z;
    shBasis[3] = 0.488603 * x;
    shBasis[4] = 1.092548 * x * y;
    shBasis[5] = 1.092548 * y * z;
    shBasis[6] = 0.315392 * (3 * z * z - 1);
    shBasis[7] = 1.092548 * x * z;
    shBasis[8] = 0.546274 * (x * x - y * y);
  }
}
SphericalHarmonics3.prototype.isSphericalHarmonics3 = true;
class LightProbe extends Light {
  constructor(sh = new SphericalHarmonics3(), intensity = 1) {
    super(void 0, intensity);
    this.sh = sh;
  }
  copy(source) {
    super.copy(source);
    this.sh.copy(source.sh);
    return this;
  }
  fromJSON(json) {
    this.intensity = json.intensity;
    this.sh.fromArray(json.sh);
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.sh = this.sh.toArray();
    return data;
  }
}
LightProbe.prototype.isLightProbe = true;
class LoaderUtils {
  static decodeText(array) {
    if (typeof TextDecoder !== "undefined") {
      return new TextDecoder().decode(array);
    }
    let s = "";
    for (let i = 0, il = array.length; i < il; i++) {
      s += String.fromCharCode(array[i]);
    }
    try {
      return decodeURIComponent(escape(s));
    } catch (e) {
      return s;
    }
  }
  static extractUrlBase(url) {
    const index = url.lastIndexOf("/");
    if (index === -1)
      return "./";
    return url.substr(0, index + 1);
  }
  static resolveURL(url, path) {
    if (typeof url !== "string" || url === "")
      return "";
    if (/^https?:\/\//i.test(path) && /^\//.test(url)) {
      path = path.replace(/(^https?:\/\/[^\/]+).*/i, "$1");
    }
    if (/^(https?:)?\/\//i.test(url))
      return url;
    if (/^data:.*,.*$/i.test(url))
      return url;
    if (/^blob:.*$/i.test(url))
      return url;
    return path + url;
  }
}
class InstancedBufferGeometry extends BufferGeometry {
  constructor() {
    super();
    this.type = "InstancedBufferGeometry";
    this.instanceCount = Infinity;
  }
  copy(source) {
    super.copy(source);
    this.instanceCount = source.instanceCount;
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  toJSON() {
    const data = super.toJSON(this);
    data.instanceCount = this.instanceCount;
    data.isInstancedBufferGeometry = true;
    return data;
  }
}
InstancedBufferGeometry.prototype.isInstancedBufferGeometry = true;
class ImageBitmapLoader extends Loader {
  constructor(manager) {
    super(manager);
    if (typeof createImageBitmap === "undefined") {
      console.warn("THREE.ImageBitmapLoader: createImageBitmap() not supported.");
    }
    if (typeof fetch === "undefined") {
      console.warn("THREE.ImageBitmapLoader: fetch() not supported.");
    }
    this.options = {premultiplyAlpha: "none"};
  }
  setOptions(options) {
    this.options = options;
    return this;
  }
  load(url, onLoad, onProgress, onError) {
    if (url === void 0)
      url = "";
    if (this.path !== void 0)
      url = this.path + url;
    url = this.manager.resolveURL(url);
    const scope = this;
    const cached = Cache.get(url);
    if (cached !== void 0) {
      scope.manager.itemStart(url);
      setTimeout(function() {
        if (onLoad)
          onLoad(cached);
        scope.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    const fetchOptions = {};
    fetchOptions.credentials = this.crossOrigin === "anonymous" ? "same-origin" : "include";
    fetchOptions.headers = this.requestHeader;
    fetch(url, fetchOptions).then(function(res) {
      return res.blob();
    }).then(function(blob) {
      return createImageBitmap(blob, Object.assign(scope.options, {colorSpaceConversion: "none"}));
    }).then(function(imageBitmap) {
      Cache.add(url, imageBitmap);
      if (onLoad)
        onLoad(imageBitmap);
      scope.manager.itemEnd(url);
    }).catch(function(e) {
      if (onError)
        onError(e);
      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    });
    scope.manager.itemStart(url);
  }
}
ImageBitmapLoader.prototype.isImageBitmapLoader = true;
let _context;
const AudioContext = {
  getContext: function() {
    if (_context === void 0) {
      _context = new (window.AudioContext || window.webkitAudioContext)();
    }
    return _context;
  },
  setContext: function(value) {
    _context = value;
  }
};
class AudioLoader extends Loader {
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new FileLoader(this.manager);
    loader.setResponseType("arraybuffer");
    loader.setPath(this.path);
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(buffer) {
      try {
        const bufferCopy = buffer.slice(0);
        const context = AudioContext.getContext();
        context.decodeAudioData(bufferCopy, function(audioBuffer) {
          onLoad(audioBuffer);
        });
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
}
class HemisphereLightProbe extends LightProbe {
  constructor(skyColor, groundColor, intensity = 1) {
    super(void 0, intensity);
    const color1 = new Color().set(skyColor);
    const color2 = new Color().set(groundColor);
    const sky = new Vector3$1(color1.r, color1.g, color1.b);
    const ground = new Vector3$1(color2.r, color2.g, color2.b);
    const c0 = Math.sqrt(Math.PI);
    const c1 = c0 * Math.sqrt(0.75);
    this.sh.coefficients[0].copy(sky).add(ground).multiplyScalar(c0);
    this.sh.coefficients[1].copy(sky).sub(ground).multiplyScalar(c1);
  }
}
HemisphereLightProbe.prototype.isHemisphereLightProbe = true;
class AmbientLightProbe extends LightProbe {
  constructor(color, intensity = 1) {
    super(void 0, intensity);
    const color1 = new Color().set(color);
    this.sh.coefficients[0].set(color1.r, color1.g, color1.b).multiplyScalar(2 * Math.sqrt(Math.PI));
  }
}
AmbientLightProbe.prototype.isAmbientLightProbe = true;
class Clock {
  constructor(autoStart = true) {
    this.autoStart = autoStart;
    this.startTime = 0;
    this.oldTime = 0;
    this.elapsedTime = 0;
    this.running = false;
  }
  start() {
    this.startTime = now();
    this.oldTime = this.startTime;
    this.elapsedTime = 0;
    this.running = true;
  }
  stop() {
    this.getElapsedTime();
    this.running = false;
    this.autoStart = false;
  }
  getElapsedTime() {
    this.getDelta();
    return this.elapsedTime;
  }
  getDelta() {
    let diff = 0;
    if (this.autoStart && !this.running) {
      this.start();
      return 0;
    }
    if (this.running) {
      const newTime = now();
      diff = (newTime - this.oldTime) / 1e3;
      this.oldTime = newTime;
      this.elapsedTime += diff;
    }
    return diff;
  }
}
function now() {
  return (typeof performance === "undefined" ? Date : performance).now();
}
class Audio extends Object3D {
  constructor(listener) {
    super();
    this.type = "Audio";
    this.listener = listener;
    this.context = listener.context;
    this.gain = this.context.createGain();
    this.gain.connect(listener.getInput());
    this.autoplay = false;
    this.buffer = null;
    this.detune = 0;
    this.loop = false;
    this.loopStart = 0;
    this.loopEnd = 0;
    this.offset = 0;
    this.duration = void 0;
    this.playbackRate = 1;
    this.isPlaying = false;
    this.hasPlaybackControl = true;
    this.source = null;
    this.sourceType = "empty";
    this._startedAt = 0;
    this._progress = 0;
    this._connected = false;
    this.filters = [];
  }
  getOutput() {
    return this.gain;
  }
  setNodeSource(audioNode) {
    this.hasPlaybackControl = false;
    this.sourceType = "audioNode";
    this.source = audioNode;
    this.connect();
    return this;
  }
  setMediaElementSource(mediaElement) {
    this.hasPlaybackControl = false;
    this.sourceType = "mediaNode";
    this.source = this.context.createMediaElementSource(mediaElement);
    this.connect();
    return this;
  }
  setMediaStreamSource(mediaStream) {
    this.hasPlaybackControl = false;
    this.sourceType = "mediaStreamNode";
    this.source = this.context.createMediaStreamSource(mediaStream);
    this.connect();
    return this;
  }
  setBuffer(audioBuffer) {
    this.buffer = audioBuffer;
    this.sourceType = "buffer";
    if (this.autoplay)
      this.play();
    return this;
  }
  play(delay = 0) {
    if (this.isPlaying === true) {
      console.warn("THREE.Audio: Audio is already playing.");
      return;
    }
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return;
    }
    this._startedAt = this.context.currentTime + delay;
    const source = this.context.createBufferSource();
    source.buffer = this.buffer;
    source.loop = this.loop;
    source.loopStart = this.loopStart;
    source.loopEnd = this.loopEnd;
    source.onended = this.onEnded.bind(this);
    source.start(this._startedAt, this._progress + this.offset, this.duration);
    this.isPlaying = true;
    this.source = source;
    this.setDetune(this.detune);
    this.setPlaybackRate(this.playbackRate);
    return this.connect();
  }
  pause() {
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return;
    }
    if (this.isPlaying === true) {
      this._progress += Math.max(this.context.currentTime - this._startedAt, 0) * this.playbackRate;
      if (this.loop === true) {
        this._progress = this._progress % (this.duration || this.buffer.duration);
      }
      this.source.stop();
      this.source.onended = null;
      this.isPlaying = false;
    }
    return this;
  }
  stop() {
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return;
    }
    this._progress = 0;
    this.source.stop();
    this.source.onended = null;
    this.isPlaying = false;
    return this;
  }
  connect() {
    if (this.filters.length > 0) {
      this.source.connect(this.filters[0]);
      for (let i = 1, l = this.filters.length; i < l; i++) {
        this.filters[i - 1].connect(this.filters[i]);
      }
      this.filters[this.filters.length - 1].connect(this.getOutput());
    } else {
      this.source.connect(this.getOutput());
    }
    this._connected = true;
    return this;
  }
  disconnect() {
    if (this.filters.length > 0) {
      this.source.disconnect(this.filters[0]);
      for (let i = 1, l = this.filters.length; i < l; i++) {
        this.filters[i - 1].disconnect(this.filters[i]);
      }
      this.filters[this.filters.length - 1].disconnect(this.getOutput());
    } else {
      this.source.disconnect(this.getOutput());
    }
    this._connected = false;
    return this;
  }
  getFilters() {
    return this.filters;
  }
  setFilters(value) {
    if (!value)
      value = [];
    if (this._connected === true) {
      this.disconnect();
      this.filters = value.slice();
      this.connect();
    } else {
      this.filters = value.slice();
    }
    return this;
  }
  setDetune(value) {
    this.detune = value;
    if (this.source.detune === void 0)
      return;
    if (this.isPlaying === true) {
      this.source.detune.setTargetAtTime(this.detune, this.context.currentTime, 0.01);
    }
    return this;
  }
  getDetune() {
    return this.detune;
  }
  getFilter() {
    return this.getFilters()[0];
  }
  setFilter(filter) {
    return this.setFilters(filter ? [filter] : []);
  }
  setPlaybackRate(value) {
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return;
    }
    this.playbackRate = value;
    if (this.isPlaying === true) {
      this.source.playbackRate.setTargetAtTime(this.playbackRate, this.context.currentTime, 0.01);
    }
    return this;
  }
  getPlaybackRate() {
    return this.playbackRate;
  }
  onEnded() {
    this.isPlaying = false;
  }
  getLoop() {
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return false;
    }
    return this.loop;
  }
  setLoop(value) {
    if (this.hasPlaybackControl === false) {
      console.warn("THREE.Audio: this Audio has no playback control.");
      return;
    }
    this.loop = value;
    if (this.isPlaying === true) {
      this.source.loop = this.loop;
    }
    return this;
  }
  setLoopStart(value) {
    this.loopStart = value;
    return this;
  }
  setLoopEnd(value) {
    this.loopEnd = value;
    return this;
  }
  getVolume() {
    return this.gain.gain.value;
  }
  setVolume(value) {
    this.gain.gain.setTargetAtTime(value, this.context.currentTime, 0.01);
    return this;
  }
}
class PropertyMixer {
  constructor(binding, typeName, valueSize) {
    this.binding = binding;
    this.valueSize = valueSize;
    let mixFunction, mixFunctionAdditive, setIdentity;
    switch (typeName) {
      case "quaternion":
        mixFunction = this._slerp;
        mixFunctionAdditive = this._slerpAdditive;
        setIdentity = this._setAdditiveIdentityQuaternion;
        this.buffer = new Float64Array(valueSize * 6);
        this._workIndex = 5;
        break;
      case "string":
      case "bool":
        mixFunction = this._select;
        mixFunctionAdditive = this._select;
        setIdentity = this._setAdditiveIdentityOther;
        this.buffer = new Array(valueSize * 5);
        break;
      default:
        mixFunction = this._lerp;
        mixFunctionAdditive = this._lerpAdditive;
        setIdentity = this._setAdditiveIdentityNumeric;
        this.buffer = new Float64Array(valueSize * 5);
    }
    this._mixBufferRegion = mixFunction;
    this._mixBufferRegionAdditive = mixFunctionAdditive;
    this._setIdentity = setIdentity;
    this._origIndex = 3;
    this._addIndex = 4;
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
    this.useCount = 0;
    this.referenceCount = 0;
  }
  accumulate(accuIndex, weight) {
    const buffer = this.buffer, stride = this.valueSize, offset = accuIndex * stride + stride;
    let currentWeight = this.cumulativeWeight;
    if (currentWeight === 0) {
      for (let i = 0; i !== stride; ++i) {
        buffer[offset + i] = buffer[i];
      }
      currentWeight = weight;
    } else {
      currentWeight += weight;
      const mix = weight / currentWeight;
      this._mixBufferRegion(buffer, offset, 0, mix, stride);
    }
    this.cumulativeWeight = currentWeight;
  }
  accumulateAdditive(weight) {
    const buffer = this.buffer, stride = this.valueSize, offset = stride * this._addIndex;
    if (this.cumulativeWeightAdditive === 0) {
      this._setIdentity();
    }
    this._mixBufferRegionAdditive(buffer, offset, 0, weight, stride);
    this.cumulativeWeightAdditive += weight;
  }
  apply(accuIndex) {
    const stride = this.valueSize, buffer = this.buffer, offset = accuIndex * stride + stride, weight = this.cumulativeWeight, weightAdditive = this.cumulativeWeightAdditive, binding = this.binding;
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
    if (weight < 1) {
      const originalValueOffset = stride * this._origIndex;
      this._mixBufferRegion(buffer, offset, originalValueOffset, 1 - weight, stride);
    }
    if (weightAdditive > 0) {
      this._mixBufferRegionAdditive(buffer, offset, this._addIndex * stride, 1, stride);
    }
    for (let i = stride, e = stride + stride; i !== e; ++i) {
      if (buffer[i] !== buffer[i + stride]) {
        binding.setValue(buffer, offset);
        break;
      }
    }
  }
  saveOriginalState() {
    const binding = this.binding;
    const buffer = this.buffer, stride = this.valueSize, originalValueOffset = stride * this._origIndex;
    binding.getValue(buffer, originalValueOffset);
    for (let i = stride, e = originalValueOffset; i !== e; ++i) {
      buffer[i] = buffer[originalValueOffset + i % stride];
    }
    this._setIdentity();
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
  }
  restoreOriginalState() {
    const originalValueOffset = this.valueSize * 3;
    this.binding.setValue(this.buffer, originalValueOffset);
  }
  _setAdditiveIdentityNumeric() {
    const startIndex = this._addIndex * this.valueSize;
    const endIndex = startIndex + this.valueSize;
    for (let i = startIndex; i < endIndex; i++) {
      this.buffer[i] = 0;
    }
  }
  _setAdditiveIdentityQuaternion() {
    this._setAdditiveIdentityNumeric();
    this.buffer[this._addIndex * this.valueSize + 3] = 1;
  }
  _setAdditiveIdentityOther() {
    const startIndex = this._origIndex * this.valueSize;
    const targetIndex = this._addIndex * this.valueSize;
    for (let i = 0; i < this.valueSize; i++) {
      this.buffer[targetIndex + i] = this.buffer[startIndex + i];
    }
  }
  _select(buffer, dstOffset, srcOffset, t, stride) {
    if (t >= 0.5) {
      for (let i = 0; i !== stride; ++i) {
        buffer[dstOffset + i] = buffer[srcOffset + i];
      }
    }
  }
  _slerp(buffer, dstOffset, srcOffset, t) {
    Quaternion$1.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t);
  }
  _slerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
    const workOffset = this._workIndex * stride;
    Quaternion$1.multiplyQuaternionsFlat(buffer, workOffset, buffer, dstOffset, buffer, srcOffset);
    Quaternion$1.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t);
  }
  _lerp(buffer, dstOffset, srcOffset, t, stride) {
    const s = 1 - t;
    for (let i = 0; i !== stride; ++i) {
      const j = dstOffset + i;
      buffer[j] = buffer[j] * s + buffer[srcOffset + i] * t;
    }
  }
  _lerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
    for (let i = 0; i !== stride; ++i) {
      const j = dstOffset + i;
      buffer[j] = buffer[j] + buffer[srcOffset + i] * t;
    }
  }
}
const _RESERVED_CHARS_RE = "\\[\\]\\.:\\/";
const _reservedRe = new RegExp("[" + _RESERVED_CHARS_RE + "]", "g");
const _wordChar = "[^" + _RESERVED_CHARS_RE + "]";
const _wordCharOrDot = "[^" + _RESERVED_CHARS_RE.replace("\\.", "") + "]";
const _directoryRe = /((?:WC+[\/:])*)/.source.replace("WC", _wordChar);
const _nodeRe = /(WCOD+)?/.source.replace("WCOD", _wordCharOrDot);
const _objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace("WC", _wordChar);
const _propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace("WC", _wordChar);
const _trackRe = new RegExp("^" + _directoryRe + _nodeRe + _objectRe + _propertyRe + "$");
const _supportedObjectNames = ["material", "materials", "bones"];
class Composite {
  constructor(targetGroup, path, optionalParsedPath) {
    const parsedPath = optionalParsedPath || PropertyBinding.parseTrackName(path);
    this._targetGroup = targetGroup;
    this._bindings = targetGroup.subscribe_(path, parsedPath);
  }
  getValue(array, offset) {
    this.bind();
    const firstValidIndex = this._targetGroup.nCachedObjects_, binding = this._bindings[firstValidIndex];
    if (binding !== void 0)
      binding.getValue(array, offset);
  }
  setValue(array, offset) {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].setValue(array, offset);
    }
  }
  bind() {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].bind();
    }
  }
  unbind() {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].unbind();
    }
  }
}
class PropertyBinding {
  constructor(rootNode, path, parsedPath) {
    this.path = path;
    this.parsedPath = parsedPath || PropertyBinding.parseTrackName(path);
    this.node = PropertyBinding.findNode(rootNode, this.parsedPath.nodeName) || rootNode;
    this.rootNode = rootNode;
    this.getValue = this._getValue_unbound;
    this.setValue = this._setValue_unbound;
  }
  static create(root, path, parsedPath) {
    if (!(root && root.isAnimationObjectGroup)) {
      return new PropertyBinding(root, path, parsedPath);
    } else {
      return new PropertyBinding.Composite(root, path, parsedPath);
    }
  }
  static sanitizeNodeName(name) {
    return name.replace(/\s/g, "_").replace(_reservedRe, "");
  }
  static parseTrackName(trackName) {
    const matches = _trackRe.exec(trackName);
    if (!matches) {
      throw new Error("PropertyBinding: Cannot parse trackName: " + trackName);
    }
    const results = {
      nodeName: matches[2],
      objectName: matches[3],
      objectIndex: matches[4],
      propertyName: matches[5],
      propertyIndex: matches[6]
    };
    const lastDot = results.nodeName && results.nodeName.lastIndexOf(".");
    if (lastDot !== void 0 && lastDot !== -1) {
      const objectName = results.nodeName.substring(lastDot + 1);
      if (_supportedObjectNames.indexOf(objectName) !== -1) {
        results.nodeName = results.nodeName.substring(0, lastDot);
        results.objectName = objectName;
      }
    }
    if (results.propertyName === null || results.propertyName.length === 0) {
      throw new Error("PropertyBinding: can not parse propertyName from trackName: " + trackName);
    }
    return results;
  }
  static findNode(root, nodeName) {
    if (!nodeName || nodeName === "" || nodeName === "." || nodeName === -1 || nodeName === root.name || nodeName === root.uuid) {
      return root;
    }
    if (root.skeleton) {
      const bone = root.skeleton.getBoneByName(nodeName);
      if (bone !== void 0) {
        return bone;
      }
    }
    if (root.children) {
      const searchNodeSubtree = function(children) {
        for (let i = 0; i < children.length; i++) {
          const childNode = children[i];
          if (childNode.name === nodeName || childNode.uuid === nodeName) {
            return childNode;
          }
          const result = searchNodeSubtree(childNode.children);
          if (result)
            return result;
        }
        return null;
      };
      const subTreeNode = searchNodeSubtree(root.children);
      if (subTreeNode) {
        return subTreeNode;
      }
    }
    return null;
  }
  _getValue_unavailable() {
  }
  _setValue_unavailable() {
  }
  _getValue_direct(buffer, offset) {
    buffer[offset] = this.targetObject[this.propertyName];
  }
  _getValue_array(buffer, offset) {
    const source = this.resolvedProperty;
    for (let i = 0, n = source.length; i !== n; ++i) {
      buffer[offset++] = source[i];
    }
  }
  _getValue_arrayElement(buffer, offset) {
    buffer[offset] = this.resolvedProperty[this.propertyIndex];
  }
  _getValue_toArray(buffer, offset) {
    this.resolvedProperty.toArray(buffer, offset);
  }
  _setValue_direct(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
  }
  _setValue_direct_setNeedsUpdate(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
    this.targetObject.needsUpdate = true;
  }
  _setValue_direct_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  _setValue_array(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
  }
  _setValue_array_setNeedsUpdate(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
    this.targetObject.needsUpdate = true;
  }
  _setValue_array_setMatrixWorldNeedsUpdate(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  _setValue_arrayElement(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
  }
  _setValue_arrayElement_setNeedsUpdate(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
    this.targetObject.needsUpdate = true;
  }
  _setValue_arrayElement_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  _setValue_fromArray(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
  }
  _setValue_fromArray_setNeedsUpdate(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
    this.targetObject.needsUpdate = true;
  }
  _setValue_fromArray_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  _getValue_unbound(targetArray, offset) {
    this.bind();
    this.getValue(targetArray, offset);
  }
  _setValue_unbound(sourceArray, offset) {
    this.bind();
    this.setValue(sourceArray, offset);
  }
  bind() {
    let targetObject = this.node;
    const parsedPath = this.parsedPath;
    const objectName = parsedPath.objectName;
    const propertyName = parsedPath.propertyName;
    let propertyIndex = parsedPath.propertyIndex;
    if (!targetObject) {
      targetObject = PropertyBinding.findNode(this.rootNode, parsedPath.nodeName) || this.rootNode;
      this.node = targetObject;
    }
    this.getValue = this._getValue_unavailable;
    this.setValue = this._setValue_unavailable;
    if (!targetObject) {
      console.error("THREE.PropertyBinding: Trying to update node for track: " + this.path + " but it wasn't found.");
      return;
    }
    if (objectName) {
      let objectIndex = parsedPath.objectIndex;
      switch (objectName) {
        case "materials":
          if (!targetObject.material) {
            console.error("THREE.PropertyBinding: Can not bind to material as node does not have a material.", this);
            return;
          }
          if (!targetObject.material.materials) {
            console.error("THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.", this);
            return;
          }
          targetObject = targetObject.material.materials;
          break;
        case "bones":
          if (!targetObject.skeleton) {
            console.error("THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.", this);
            return;
          }
          targetObject = targetObject.skeleton.bones;
          for (let i = 0; i < targetObject.length; i++) {
            if (targetObject[i].name === objectIndex) {
              objectIndex = i;
              break;
            }
          }
          break;
        default:
          if (targetObject[objectName] === void 0) {
            console.error("THREE.PropertyBinding: Can not bind to objectName of node undefined.", this);
            return;
          }
          targetObject = targetObject[objectName];
      }
      if (objectIndex !== void 0) {
        if (targetObject[objectIndex] === void 0) {
          console.error("THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.", this, targetObject);
          return;
        }
        targetObject = targetObject[objectIndex];
      }
    }
    const nodeProperty = targetObject[propertyName];
    if (nodeProperty === void 0) {
      const nodeName = parsedPath.nodeName;
      console.error("THREE.PropertyBinding: Trying to update property for track: " + nodeName + "." + propertyName + " but it wasn't found.", targetObject);
      return;
    }
    let versioning = this.Versioning.None;
    this.targetObject = targetObject;
    if (targetObject.needsUpdate !== void 0) {
      versioning = this.Versioning.NeedsUpdate;
    } else if (targetObject.matrixWorldNeedsUpdate !== void 0) {
      versioning = this.Versioning.MatrixWorldNeedsUpdate;
    }
    let bindingType = this.BindingType.Direct;
    if (propertyIndex !== void 0) {
      if (propertyName === "morphTargetInfluences") {
        if (!targetObject.geometry) {
          console.error("THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.", this);
          return;
        }
        if (targetObject.geometry.isBufferGeometry) {
          if (!targetObject.geometry.morphAttributes) {
            console.error("THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.", this);
            return;
          }
          if (targetObject.morphTargetDictionary[propertyIndex] !== void 0) {
            propertyIndex = targetObject.morphTargetDictionary[propertyIndex];
          }
        } else {
          console.error("THREE.PropertyBinding: Can not bind to morphTargetInfluences on THREE.Geometry. Use THREE.BufferGeometry instead.", this);
          return;
        }
      }
      bindingType = this.BindingType.ArrayElement;
      this.resolvedProperty = nodeProperty;
      this.propertyIndex = propertyIndex;
    } else if (nodeProperty.fromArray !== void 0 && nodeProperty.toArray !== void 0) {
      bindingType = this.BindingType.HasFromToArray;
      this.resolvedProperty = nodeProperty;
    } else if (Array.isArray(nodeProperty)) {
      bindingType = this.BindingType.EntireArray;
      this.resolvedProperty = nodeProperty;
    } else {
      this.propertyName = propertyName;
    }
    this.getValue = this.GetterByBindingType[bindingType];
    this.setValue = this.SetterByBindingTypeAndVersioning[bindingType][versioning];
  }
  unbind() {
    this.node = null;
    this.getValue = this._getValue_unbound;
    this.setValue = this._setValue_unbound;
  }
}
PropertyBinding.Composite = Composite;
PropertyBinding.prototype.BindingType = {
  Direct: 0,
  EntireArray: 1,
  ArrayElement: 2,
  HasFromToArray: 3
};
PropertyBinding.prototype.Versioning = {
  None: 0,
  NeedsUpdate: 1,
  MatrixWorldNeedsUpdate: 2
};
PropertyBinding.prototype.GetterByBindingType = [
  PropertyBinding.prototype._getValue_direct,
  PropertyBinding.prototype._getValue_array,
  PropertyBinding.prototype._getValue_arrayElement,
  PropertyBinding.prototype._getValue_toArray
];
PropertyBinding.prototype.SetterByBindingTypeAndVersioning = [
  [
    PropertyBinding.prototype._setValue_direct,
    PropertyBinding.prototype._setValue_direct_setNeedsUpdate,
    PropertyBinding.prototype._setValue_direct_setMatrixWorldNeedsUpdate
  ],
  [
    PropertyBinding.prototype._setValue_array,
    PropertyBinding.prototype._setValue_array_setNeedsUpdate,
    PropertyBinding.prototype._setValue_array_setMatrixWorldNeedsUpdate
  ],
  [
    PropertyBinding.prototype._setValue_arrayElement,
    PropertyBinding.prototype._setValue_arrayElement_setNeedsUpdate,
    PropertyBinding.prototype._setValue_arrayElement_setMatrixWorldNeedsUpdate
  ],
  [
    PropertyBinding.prototype._setValue_fromArray,
    PropertyBinding.prototype._setValue_fromArray_setNeedsUpdate,
    PropertyBinding.prototype._setValue_fromArray_setMatrixWorldNeedsUpdate
  ]
];
class AnimationAction {
  constructor(mixer, clip, localRoot = null, blendMode = clip.blendMode) {
    this._mixer = mixer;
    this._clip = clip;
    this._localRoot = localRoot;
    this.blendMode = blendMode;
    const tracks = clip.tracks, nTracks = tracks.length, interpolants = new Array(nTracks);
    const interpolantSettings = {
      endingStart: ZeroCurvatureEnding,
      endingEnd: ZeroCurvatureEnding
    };
    for (let i = 0; i !== nTracks; ++i) {
      const interpolant = tracks[i].createInterpolant(null);
      interpolants[i] = interpolant;
      interpolant.settings = interpolantSettings;
    }
    this._interpolantSettings = interpolantSettings;
    this._interpolants = interpolants;
    this._propertyBindings = new Array(nTracks);
    this._cacheIndex = null;
    this._byClipCacheIndex = null;
    this._timeScaleInterpolant = null;
    this._weightInterpolant = null;
    this.loop = LoopRepeat;
    this._loopCount = -1;
    this._startTime = null;
    this.time = 0;
    this.timeScale = 1;
    this._effectiveTimeScale = 1;
    this.weight = 1;
    this._effectiveWeight = 1;
    this.repetitions = Infinity;
    this.paused = false;
    this.enabled = true;
    this.clampWhenFinished = false;
    this.zeroSlopeAtStart = true;
    this.zeroSlopeAtEnd = true;
  }
  play() {
    this._mixer._activateAction(this);
    return this;
  }
  stop() {
    this._mixer._deactivateAction(this);
    return this.reset();
  }
  reset() {
    this.paused = false;
    this.enabled = true;
    this.time = 0;
    this._loopCount = -1;
    this._startTime = null;
    return this.stopFading().stopWarping();
  }
  isRunning() {
    return this.enabled && !this.paused && this.timeScale !== 0 && this._startTime === null && this._mixer._isActiveAction(this);
  }
  isScheduled() {
    return this._mixer._isActiveAction(this);
  }
  startAt(time) {
    this._startTime = time;
    return this;
  }
  setLoop(mode, repetitions) {
    this.loop = mode;
    this.repetitions = repetitions;
    return this;
  }
  setEffectiveWeight(weight) {
    this.weight = weight;
    this._effectiveWeight = this.enabled ? weight : 0;
    return this.stopFading();
  }
  getEffectiveWeight() {
    return this._effectiveWeight;
  }
  fadeIn(duration) {
    return this._scheduleFading(duration, 0, 1);
  }
  fadeOut(duration) {
    return this._scheduleFading(duration, 1, 0);
  }
  crossFadeFrom(fadeOutAction, duration, warp) {
    fadeOutAction.fadeOut(duration);
    this.fadeIn(duration);
    if (warp) {
      const fadeInDuration = this._clip.duration, fadeOutDuration = fadeOutAction._clip.duration, startEndRatio = fadeOutDuration / fadeInDuration, endStartRatio = fadeInDuration / fadeOutDuration;
      fadeOutAction.warp(1, startEndRatio, duration);
      this.warp(endStartRatio, 1, duration);
    }
    return this;
  }
  crossFadeTo(fadeInAction, duration, warp) {
    return fadeInAction.crossFadeFrom(this, duration, warp);
  }
  stopFading() {
    const weightInterpolant = this._weightInterpolant;
    if (weightInterpolant !== null) {
      this._weightInterpolant = null;
      this._mixer._takeBackControlInterpolant(weightInterpolant);
    }
    return this;
  }
  setEffectiveTimeScale(timeScale) {
    this.timeScale = timeScale;
    this._effectiveTimeScale = this.paused ? 0 : timeScale;
    return this.stopWarping();
  }
  getEffectiveTimeScale() {
    return this._effectiveTimeScale;
  }
  setDuration(duration) {
    this.timeScale = this._clip.duration / duration;
    return this.stopWarping();
  }
  syncWith(action) {
    this.time = action.time;
    this.timeScale = action.timeScale;
    return this.stopWarping();
  }
  halt(duration) {
    return this.warp(this._effectiveTimeScale, 0, duration);
  }
  warp(startTimeScale, endTimeScale, duration) {
    const mixer = this._mixer, now2 = mixer.time, timeScale = this.timeScale;
    let interpolant = this._timeScaleInterpolant;
    if (interpolant === null) {
      interpolant = mixer._lendControlInterpolant();
      this._timeScaleInterpolant = interpolant;
    }
    const times = interpolant.parameterPositions, values = interpolant.sampleValues;
    times[0] = now2;
    times[1] = now2 + duration;
    values[0] = startTimeScale / timeScale;
    values[1] = endTimeScale / timeScale;
    return this;
  }
  stopWarping() {
    const timeScaleInterpolant = this._timeScaleInterpolant;
    if (timeScaleInterpolant !== null) {
      this._timeScaleInterpolant = null;
      this._mixer._takeBackControlInterpolant(timeScaleInterpolant);
    }
    return this;
  }
  getMixer() {
    return this._mixer;
  }
  getClip() {
    return this._clip;
  }
  getRoot() {
    return this._localRoot || this._mixer._root;
  }
  _update(time, deltaTime, timeDirection, accuIndex) {
    if (!this.enabled) {
      this._updateWeight(time);
      return;
    }
    const startTime = this._startTime;
    if (startTime !== null) {
      const timeRunning = (time - startTime) * timeDirection;
      if (timeRunning < 0 || timeDirection === 0) {
        return;
      }
      this._startTime = null;
      deltaTime = timeDirection * timeRunning;
    }
    deltaTime *= this._updateTimeScale(time);
    const clipTime = this._updateTime(deltaTime);
    const weight = this._updateWeight(time);
    if (weight > 0) {
      const interpolants = this._interpolants;
      const propertyMixers = this._propertyBindings;
      switch (this.blendMode) {
        case AdditiveAnimationBlendMode:
          for (let j = 0, m = interpolants.length; j !== m; ++j) {
            interpolants[j].evaluate(clipTime);
            propertyMixers[j].accumulateAdditive(weight);
          }
          break;
        case NormalAnimationBlendMode:
        default:
          for (let j = 0, m = interpolants.length; j !== m; ++j) {
            interpolants[j].evaluate(clipTime);
            propertyMixers[j].accumulate(accuIndex, weight);
          }
      }
    }
  }
  _updateWeight(time) {
    let weight = 0;
    if (this.enabled) {
      weight = this.weight;
      const interpolant = this._weightInterpolant;
      if (interpolant !== null) {
        const interpolantValue = interpolant.evaluate(time)[0];
        weight *= interpolantValue;
        if (time > interpolant.parameterPositions[1]) {
          this.stopFading();
          if (interpolantValue === 0) {
            this.enabled = false;
          }
        }
      }
    }
    this._effectiveWeight = weight;
    return weight;
  }
  _updateTimeScale(time) {
    let timeScale = 0;
    if (!this.paused) {
      timeScale = this.timeScale;
      const interpolant = this._timeScaleInterpolant;
      if (interpolant !== null) {
        const interpolantValue = interpolant.evaluate(time)[0];
        timeScale *= interpolantValue;
        if (time > interpolant.parameterPositions[1]) {
          this.stopWarping();
          if (timeScale === 0) {
            this.paused = true;
          } else {
            this.timeScale = timeScale;
          }
        }
      }
    }
    this._effectiveTimeScale = timeScale;
    return timeScale;
  }
  _updateTime(deltaTime) {
    const duration = this._clip.duration;
    const loop = this.loop;
    let time = this.time + deltaTime;
    let loopCount = this._loopCount;
    const pingPong = loop === LoopPingPong;
    if (deltaTime === 0) {
      if (loopCount === -1)
        return time;
      return pingPong && (loopCount & 1) === 1 ? duration - time : time;
    }
    if (loop === LoopOnce) {
      if (loopCount === -1) {
        this._loopCount = 0;
        this._setEndings(true, true, false);
      }
      handle_stop: {
        if (time >= duration) {
          time = duration;
        } else if (time < 0) {
          time = 0;
        } else {
          this.time = time;
          break handle_stop;
        }
        if (this.clampWhenFinished)
          this.paused = true;
        else
          this.enabled = false;
        this.time = time;
        this._mixer.dispatchEvent({
          type: "finished",
          action: this,
          direction: deltaTime < 0 ? -1 : 1
        });
      }
    } else {
      if (loopCount === -1) {
        if (deltaTime >= 0) {
          loopCount = 0;
          this._setEndings(true, this.repetitions === 0, pingPong);
        } else {
          this._setEndings(this.repetitions === 0, true, pingPong);
        }
      }
      if (time >= duration || time < 0) {
        const loopDelta = Math.floor(time / duration);
        time -= duration * loopDelta;
        loopCount += Math.abs(loopDelta);
        const pending = this.repetitions - loopCount;
        if (pending <= 0) {
          if (this.clampWhenFinished)
            this.paused = true;
          else
            this.enabled = false;
          time = deltaTime > 0 ? duration : 0;
          this.time = time;
          this._mixer.dispatchEvent({
            type: "finished",
            action: this,
            direction: deltaTime > 0 ? 1 : -1
          });
        } else {
          if (pending === 1) {
            const atStart = deltaTime < 0;
            this._setEndings(atStart, !atStart, pingPong);
          } else {
            this._setEndings(false, false, pingPong);
          }
          this._loopCount = loopCount;
          this.time = time;
          this._mixer.dispatchEvent({
            type: "loop",
            action: this,
            loopDelta
          });
        }
      } else {
        this.time = time;
      }
      if (pingPong && (loopCount & 1) === 1) {
        return duration - time;
      }
    }
    return time;
  }
  _setEndings(atStart, atEnd, pingPong) {
    const settings = this._interpolantSettings;
    if (pingPong) {
      settings.endingStart = ZeroSlopeEnding;
      settings.endingEnd = ZeroSlopeEnding;
    } else {
      if (atStart) {
        settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;
      } else {
        settings.endingStart = WrapAroundEnding;
      }
      if (atEnd) {
        settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;
      } else {
        settings.endingEnd = WrapAroundEnding;
      }
    }
  }
  _scheduleFading(duration, weightNow, weightThen) {
    const mixer = this._mixer, now2 = mixer.time;
    let interpolant = this._weightInterpolant;
    if (interpolant === null) {
      interpolant = mixer._lendControlInterpolant();
      this._weightInterpolant = interpolant;
    }
    const times = interpolant.parameterPositions, values = interpolant.sampleValues;
    times[0] = now2;
    values[0] = weightNow;
    times[1] = now2 + duration;
    values[1] = weightThen;
    return this;
  }
}
class AnimationMixer extends EventDispatcher {
  constructor(root) {
    super();
    this._root = root;
    this._initMemoryManager();
    this._accuIndex = 0;
    this.time = 0;
    this.timeScale = 1;
  }
  _bindAction(action, prototypeAction) {
    const root = action._localRoot || this._root, tracks = action._clip.tracks, nTracks = tracks.length, bindings = action._propertyBindings, interpolants = action._interpolants, rootUuid = root.uuid, bindingsByRoot = this._bindingsByRootAndName;
    let bindingsByName = bindingsByRoot[rootUuid];
    if (bindingsByName === void 0) {
      bindingsByName = {};
      bindingsByRoot[rootUuid] = bindingsByName;
    }
    for (let i = 0; i !== nTracks; ++i) {
      const track = tracks[i], trackName = track.name;
      let binding = bindingsByName[trackName];
      if (binding !== void 0) {
        ++binding.referenceCount;
        bindings[i] = binding;
      } else {
        binding = bindings[i];
        if (binding !== void 0) {
          if (binding._cacheIndex === null) {
            ++binding.referenceCount;
            this._addInactiveBinding(binding, rootUuid, trackName);
          }
          continue;
        }
        const path = prototypeAction && prototypeAction._propertyBindings[i].binding.parsedPath;
        binding = new PropertyMixer(PropertyBinding.create(root, trackName, path), track.ValueTypeName, track.getValueSize());
        ++binding.referenceCount;
        this._addInactiveBinding(binding, rootUuid, trackName);
        bindings[i] = binding;
      }
      interpolants[i].resultBuffer = binding.buffer;
    }
  }
  _activateAction(action) {
    if (!this._isActiveAction(action)) {
      if (action._cacheIndex === null) {
        const rootUuid = (action._localRoot || this._root).uuid, clipUuid = action._clip.uuid, actionsForClip = this._actionsByClip[clipUuid];
        this._bindAction(action, actionsForClip && actionsForClip.knownActions[0]);
        this._addInactiveAction(action, clipUuid, rootUuid);
      }
      const bindings = action._propertyBindings;
      for (let i = 0, n = bindings.length; i !== n; ++i) {
        const binding = bindings[i];
        if (binding.useCount++ === 0) {
          this._lendBinding(binding);
          binding.saveOriginalState();
        }
      }
      this._lendAction(action);
    }
  }
  _deactivateAction(action) {
    if (this._isActiveAction(action)) {
      const bindings = action._propertyBindings;
      for (let i = 0, n = bindings.length; i !== n; ++i) {
        const binding = bindings[i];
        if (--binding.useCount === 0) {
          binding.restoreOriginalState();
          this._takeBackBinding(binding);
        }
      }
      this._takeBackAction(action);
    }
  }
  _initMemoryManager() {
    this._actions = [];
    this._nActiveActions = 0;
    this._actionsByClip = {};
    this._bindings = [];
    this._nActiveBindings = 0;
    this._bindingsByRootAndName = {};
    this._controlInterpolants = [];
    this._nActiveControlInterpolants = 0;
    const scope = this;
    this.stats = {
      actions: {
        get total() {
          return scope._actions.length;
        },
        get inUse() {
          return scope._nActiveActions;
        }
      },
      bindings: {
        get total() {
          return scope._bindings.length;
        },
        get inUse() {
          return scope._nActiveBindings;
        }
      },
      controlInterpolants: {
        get total() {
          return scope._controlInterpolants.length;
        },
        get inUse() {
          return scope._nActiveControlInterpolants;
        }
      }
    };
  }
  _isActiveAction(action) {
    const index = action._cacheIndex;
    return index !== null && index < this._nActiveActions;
  }
  _addInactiveAction(action, clipUuid, rootUuid) {
    const actions = this._actions, actionsByClip = this._actionsByClip;
    let actionsForClip = actionsByClip[clipUuid];
    if (actionsForClip === void 0) {
      actionsForClip = {
        knownActions: [action],
        actionByRoot: {}
      };
      action._byClipCacheIndex = 0;
      actionsByClip[clipUuid] = actionsForClip;
    } else {
      const knownActions = actionsForClip.knownActions;
      action._byClipCacheIndex = knownActions.length;
      knownActions.push(action);
    }
    action._cacheIndex = actions.length;
    actions.push(action);
    actionsForClip.actionByRoot[rootUuid] = action;
  }
  _removeInactiveAction(action) {
    const actions = this._actions, lastInactiveAction = actions[actions.length - 1], cacheIndex = action._cacheIndex;
    lastInactiveAction._cacheIndex = cacheIndex;
    actions[cacheIndex] = lastInactiveAction;
    actions.pop();
    action._cacheIndex = null;
    const clipUuid = action._clip.uuid, actionsByClip = this._actionsByClip, actionsForClip = actionsByClip[clipUuid], knownActionsForClip = actionsForClip.knownActions, lastKnownAction = knownActionsForClip[knownActionsForClip.length - 1], byClipCacheIndex = action._byClipCacheIndex;
    lastKnownAction._byClipCacheIndex = byClipCacheIndex;
    knownActionsForClip[byClipCacheIndex] = lastKnownAction;
    knownActionsForClip.pop();
    action._byClipCacheIndex = null;
    const actionByRoot = actionsForClip.actionByRoot, rootUuid = (action._localRoot || this._root).uuid;
    delete actionByRoot[rootUuid];
    if (knownActionsForClip.length === 0) {
      delete actionsByClip[clipUuid];
    }
    this._removeInactiveBindingsForAction(action);
  }
  _removeInactiveBindingsForAction(action) {
    const bindings = action._propertyBindings;
    for (let i = 0, n = bindings.length; i !== n; ++i) {
      const binding = bindings[i];
      if (--binding.referenceCount === 0) {
        this._removeInactiveBinding(binding);
      }
    }
  }
  _lendAction(action) {
    const actions = this._actions, prevIndex = action._cacheIndex, lastActiveIndex = this._nActiveActions++, firstInactiveAction = actions[lastActiveIndex];
    action._cacheIndex = lastActiveIndex;
    actions[lastActiveIndex] = action;
    firstInactiveAction._cacheIndex = prevIndex;
    actions[prevIndex] = firstInactiveAction;
  }
  _takeBackAction(action) {
    const actions = this._actions, prevIndex = action._cacheIndex, firstInactiveIndex = --this._nActiveActions, lastActiveAction = actions[firstInactiveIndex];
    action._cacheIndex = firstInactiveIndex;
    actions[firstInactiveIndex] = action;
    lastActiveAction._cacheIndex = prevIndex;
    actions[prevIndex] = lastActiveAction;
  }
  _addInactiveBinding(binding, rootUuid, trackName) {
    const bindingsByRoot = this._bindingsByRootAndName, bindings = this._bindings;
    let bindingByName = bindingsByRoot[rootUuid];
    if (bindingByName === void 0) {
      bindingByName = {};
      bindingsByRoot[rootUuid] = bindingByName;
    }
    bindingByName[trackName] = binding;
    binding._cacheIndex = bindings.length;
    bindings.push(binding);
  }
  _removeInactiveBinding(binding) {
    const bindings = this._bindings, propBinding = binding.binding, rootUuid = propBinding.rootNode.uuid, trackName = propBinding.path, bindingsByRoot = this._bindingsByRootAndName, bindingByName = bindingsByRoot[rootUuid], lastInactiveBinding = bindings[bindings.length - 1], cacheIndex = binding._cacheIndex;
    lastInactiveBinding._cacheIndex = cacheIndex;
    bindings[cacheIndex] = lastInactiveBinding;
    bindings.pop();
    delete bindingByName[trackName];
    if (Object.keys(bindingByName).length === 0) {
      delete bindingsByRoot[rootUuid];
    }
  }
  _lendBinding(binding) {
    const bindings = this._bindings, prevIndex = binding._cacheIndex, lastActiveIndex = this._nActiveBindings++, firstInactiveBinding = bindings[lastActiveIndex];
    binding._cacheIndex = lastActiveIndex;
    bindings[lastActiveIndex] = binding;
    firstInactiveBinding._cacheIndex = prevIndex;
    bindings[prevIndex] = firstInactiveBinding;
  }
  _takeBackBinding(binding) {
    const bindings = this._bindings, prevIndex = binding._cacheIndex, firstInactiveIndex = --this._nActiveBindings, lastActiveBinding = bindings[firstInactiveIndex];
    binding._cacheIndex = firstInactiveIndex;
    bindings[firstInactiveIndex] = binding;
    lastActiveBinding._cacheIndex = prevIndex;
    bindings[prevIndex] = lastActiveBinding;
  }
  _lendControlInterpolant() {
    const interpolants = this._controlInterpolants, lastActiveIndex = this._nActiveControlInterpolants++;
    let interpolant = interpolants[lastActiveIndex];
    if (interpolant === void 0) {
      interpolant = new LinearInterpolant(new Float32Array(2), new Float32Array(2), 1, this._controlInterpolantsResultBuffer);
      interpolant.__cacheIndex = lastActiveIndex;
      interpolants[lastActiveIndex] = interpolant;
    }
    return interpolant;
  }
  _takeBackControlInterpolant(interpolant) {
    const interpolants = this._controlInterpolants, prevIndex = interpolant.__cacheIndex, firstInactiveIndex = --this._nActiveControlInterpolants, lastActiveInterpolant = interpolants[firstInactiveIndex];
    interpolant.__cacheIndex = firstInactiveIndex;
    interpolants[firstInactiveIndex] = interpolant;
    lastActiveInterpolant.__cacheIndex = prevIndex;
    interpolants[prevIndex] = lastActiveInterpolant;
  }
  clipAction(clip, optionalRoot, blendMode) {
    const root = optionalRoot || this._root, rootUuid = root.uuid;
    let clipObject = typeof clip === "string" ? AnimationClip.findByName(root, clip) : clip;
    const clipUuid = clipObject !== null ? clipObject.uuid : clip;
    const actionsForClip = this._actionsByClip[clipUuid];
    let prototypeAction = null;
    if (blendMode === void 0) {
      if (clipObject !== null) {
        blendMode = clipObject.blendMode;
      } else {
        blendMode = NormalAnimationBlendMode;
      }
    }
    if (actionsForClip !== void 0) {
      const existingAction = actionsForClip.actionByRoot[rootUuid];
      if (existingAction !== void 0 && existingAction.blendMode === blendMode) {
        return existingAction;
      }
      prototypeAction = actionsForClip.knownActions[0];
      if (clipObject === null)
        clipObject = prototypeAction._clip;
    }
    if (clipObject === null)
      return null;
    const newAction = new AnimationAction(this, clipObject, optionalRoot, blendMode);
    this._bindAction(newAction, prototypeAction);
    this._addInactiveAction(newAction, clipUuid, rootUuid);
    return newAction;
  }
  existingAction(clip, optionalRoot) {
    const root = optionalRoot || this._root, rootUuid = root.uuid, clipObject = typeof clip === "string" ? AnimationClip.findByName(root, clip) : clip, clipUuid = clipObject ? clipObject.uuid : clip, actionsForClip = this._actionsByClip[clipUuid];
    if (actionsForClip !== void 0) {
      return actionsForClip.actionByRoot[rootUuid] || null;
    }
    return null;
  }
  stopAllAction() {
    const actions = this._actions, nActions = this._nActiveActions;
    for (let i = nActions - 1; i >= 0; --i) {
      actions[i].stop();
    }
    return this;
  }
  update(deltaTime) {
    deltaTime *= this.timeScale;
    const actions = this._actions, nActions = this._nActiveActions, time = this.time += deltaTime, timeDirection = Math.sign(deltaTime), accuIndex = this._accuIndex ^= 1;
    for (let i = 0; i !== nActions; ++i) {
      const action = actions[i];
      action._update(time, deltaTime, timeDirection, accuIndex);
    }
    const bindings = this._bindings, nBindings = this._nActiveBindings;
    for (let i = 0; i !== nBindings; ++i) {
      bindings[i].apply(accuIndex);
    }
    return this;
  }
  setTime(timeInSeconds) {
    this.time = 0;
    for (let i = 0; i < this._actions.length; i++) {
      this._actions[i].time = 0;
    }
    return this.update(timeInSeconds);
  }
  getRoot() {
    return this._root;
  }
  uncacheClip(clip) {
    const actions = this._actions, clipUuid = clip.uuid, actionsByClip = this._actionsByClip, actionsForClip = actionsByClip[clipUuid];
    if (actionsForClip !== void 0) {
      const actionsToRemove = actionsForClip.knownActions;
      for (let i = 0, n = actionsToRemove.length; i !== n; ++i) {
        const action = actionsToRemove[i];
        this._deactivateAction(action);
        const cacheIndex = action._cacheIndex, lastInactiveAction = actions[actions.length - 1];
        action._cacheIndex = null;
        action._byClipCacheIndex = null;
        lastInactiveAction._cacheIndex = cacheIndex;
        actions[cacheIndex] = lastInactiveAction;
        actions.pop();
        this._removeInactiveBindingsForAction(action);
      }
      delete actionsByClip[clipUuid];
    }
  }
  uncacheRoot(root) {
    const rootUuid = root.uuid, actionsByClip = this._actionsByClip;
    for (const clipUuid in actionsByClip) {
      const actionByRoot = actionsByClip[clipUuid].actionByRoot, action = actionByRoot[rootUuid];
      if (action !== void 0) {
        this._deactivateAction(action);
        this._removeInactiveAction(action);
      }
    }
    const bindingsByRoot = this._bindingsByRootAndName, bindingByName = bindingsByRoot[rootUuid];
    if (bindingByName !== void 0) {
      for (const trackName in bindingByName) {
        const binding = bindingByName[trackName];
        binding.restoreOriginalState();
        this._removeInactiveBinding(binding);
      }
    }
  }
  uncacheAction(clip, optionalRoot) {
    const action = this.existingAction(clip, optionalRoot);
    if (action !== null) {
      this._deactivateAction(action);
      this._removeInactiveAction(action);
    }
  }
}
AnimationMixer.prototype._controlInterpolantsResultBuffer = new Float32Array(1);
class InstancedInterleavedBuffer extends InterleavedBuffer {
  constructor(array, stride, meshPerAttribute = 1) {
    super(array, stride);
    this.meshPerAttribute = meshPerAttribute;
  }
  copy(source) {
    super.copy(source);
    this.meshPerAttribute = source.meshPerAttribute;
    return this;
  }
  clone(data) {
    const ib = super.clone(data);
    ib.meshPerAttribute = this.meshPerAttribute;
    return ib;
  }
  toJSON(data) {
    const json = super.toJSON(data);
    json.isInstancedInterleavedBuffer = true;
    json.meshPerAttribute = this.meshPerAttribute;
    return json;
  }
}
InstancedInterleavedBuffer.prototype.isInstancedInterleavedBuffer = true;
class Spherical {
  constructor(radius = 1, phi = 0, theta = 0) {
    this.radius = radius;
    this.phi = phi;
    this.theta = theta;
    return this;
  }
  set(radius, phi, theta) {
    this.radius = radius;
    this.phi = phi;
    this.theta = theta;
    return this;
  }
  copy(other) {
    this.radius = other.radius;
    this.phi = other.phi;
    this.theta = other.theta;
    return this;
  }
  makeSafe() {
    const EPS = 1e-6;
    this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));
    return this;
  }
  setFromVector3(v) {
    return this.setFromCartesianCoords(v.x, v.y, v.z);
  }
  setFromCartesianCoords(x, y, z) {
    this.radius = Math.sqrt(x * x + y * y + z * z);
    if (this.radius === 0) {
      this.theta = 0;
      this.phi = 0;
    } else {
      this.theta = Math.atan2(x, z);
      this.phi = Math.acos(clamp$2(y / this.radius, -1, 1));
    }
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
const _vector$2 = /* @__PURE__ */ new Vector3$1();
const _boneMatrix = /* @__PURE__ */ new Matrix4$1();
const _matrixWorldInv = /* @__PURE__ */ new Matrix4$1();
class SkeletonHelper extends LineSegments {
  constructor(object) {
    const bones = getBoneList(object);
    const geometry = new BufferGeometry();
    const vertices = [];
    const colors = [];
    const color1 = new Color(0, 0, 1);
    const color2 = new Color(0, 1, 0);
    for (let i = 0; i < bones.length; i++) {
      const bone = bones[i];
      if (bone.parent && bone.parent.isBone) {
        vertices.push(0, 0, 0);
        vertices.push(0, 0, 0);
        colors.push(color1.r, color1.g, color1.b);
        colors.push(color2.r, color2.g, color2.b);
      }
    }
    geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    geometry.setAttribute("color", new Float32BufferAttribute(colors, 3));
    const material = new LineBasicMaterial({vertexColors: true, depthTest: false, depthWrite: false, toneMapped: false, transparent: true});
    super(geometry, material);
    this.type = "SkeletonHelper";
    this.isSkeletonHelper = true;
    this.root = object;
    this.bones = bones;
    this.matrix = object.matrixWorld;
    this.matrixAutoUpdate = false;
  }
  updateMatrixWorld(force) {
    const bones = this.bones;
    const geometry = this.geometry;
    const position = geometry.getAttribute("position");
    _matrixWorldInv.copy(this.root.matrixWorld).invert();
    for (let i = 0, j = 0; i < bones.length; i++) {
      const bone = bones[i];
      if (bone.parent && bone.parent.isBone) {
        _boneMatrix.multiplyMatrices(_matrixWorldInv, bone.matrixWorld);
        _vector$2.setFromMatrixPosition(_boneMatrix);
        position.setXYZ(j, _vector$2.x, _vector$2.y, _vector$2.z);
        _boneMatrix.multiplyMatrices(_matrixWorldInv, bone.parent.matrixWorld);
        _vector$2.setFromMatrixPosition(_boneMatrix);
        position.setXYZ(j + 1, _vector$2.x, _vector$2.y, _vector$2.z);
        j += 2;
      }
    }
    geometry.getAttribute("position").needsUpdate = true;
    super.updateMatrixWorld(force);
  }
}
function getBoneList(object) {
  const boneList = [];
  if (object && object.isBone) {
    boneList.push(object);
  }
  for (let i = 0; i < object.children.length; i++) {
    boneList.push.apply(boneList, getBoneList(object.children[i]));
  }
  return boneList;
}
class GridHelper extends LineSegments {
  constructor(size = 10, divisions = 10, color1 = 4473924, color2 = 8947848) {
    color1 = new Color(color1);
    color2 = new Color(color2);
    const center = divisions / 2;
    const step = size / divisions;
    const halfSize = size / 2;
    const vertices = [], colors = [];
    for (let i = 0, j = 0, k = -halfSize; i <= divisions; i++, k += step) {
      vertices.push(-halfSize, 0, k, halfSize, 0, k);
      vertices.push(k, 0, -halfSize, k, 0, halfSize);
      const color = i === center ? color1 : color2;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
    }
    const geometry = new BufferGeometry();
    geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    geometry.setAttribute("color", new Float32BufferAttribute(colors, 3));
    const material = new LineBasicMaterial({vertexColors: true, toneMapped: false});
    super(geometry, material);
    this.type = "GridHelper";
  }
}
const _axis = /* @__PURE__ */ new Vector3$1();
let _lineGeometry, _coneGeometry;
class ArrowHelper extends Object3D {
  constructor(dir = new Vector3$1(0, 0, 1), origin = new Vector3$1(0, 0, 0), length = 1, color = 16776960, headLength = length * 0.2, headWidth = headLength * 0.2) {
    super();
    this.type = "ArrowHelper";
    if (_lineGeometry === void 0) {
      _lineGeometry = new BufferGeometry();
      _lineGeometry.setAttribute("position", new Float32BufferAttribute([0, 0, 0, 0, 1, 0], 3));
      _coneGeometry = new CylinderGeometry(0, 0.5, 1, 5, 1);
      _coneGeometry.translate(0, -0.5, 0);
    }
    this.position.copy(origin);
    this.line = new Line(_lineGeometry, new LineBasicMaterial({color, toneMapped: false}));
    this.line.matrixAutoUpdate = false;
    this.add(this.line);
    this.cone = new Mesh(_coneGeometry, new MeshBasicMaterial({color, toneMapped: false}));
    this.cone.matrixAutoUpdate = false;
    this.add(this.cone);
    this.setDirection(dir);
    this.setLength(length, headLength, headWidth);
  }
  setDirection(dir) {
    if (dir.y > 0.99999) {
      this.quaternion.set(0, 0, 0, 1);
    } else if (dir.y < -0.99999) {
      this.quaternion.set(1, 0, 0, 0);
    } else {
      _axis.set(dir.z, 0, -dir.x).normalize();
      const radians = Math.acos(dir.y);
      this.quaternion.setFromAxisAngle(_axis, radians);
    }
  }
  setLength(length, headLength = length * 0.2, headWidth = headLength * 0.2) {
    this.line.scale.set(1, Math.max(1e-4, length - headLength), 1);
    this.line.updateMatrix();
    this.cone.scale.set(headWidth, headLength, headWidth);
    this.cone.position.y = length;
    this.cone.updateMatrix();
  }
  setColor(color) {
    this.line.material.color.set(color);
    this.cone.material.color.set(color);
  }
  copy(source) {
    super.copy(source, false);
    this.line.copy(source.line);
    this.cone.copy(source.cone);
    return this;
  }
}
const _floatView = new Float32Array(1);
new Int32Array(_floatView.buffer);
Curve.create = function(construct, getPoint) {
  console.log("THREE.Curve.create() has been deprecated");
  construct.prototype = Object.create(Curve.prototype);
  construct.prototype.constructor = construct;
  construct.prototype.getPoint = getPoint;
  return construct;
};
Path.prototype.fromPoints = function(points) {
  console.warn("THREE.Path: .fromPoints() has been renamed to .setFromPoints().");
  return this.setFromPoints(points);
};
GridHelper.prototype.setColors = function() {
  console.error("THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.");
};
SkeletonHelper.prototype.update = function() {
  console.error("THREE.SkeletonHelper: update() no longer needs to be called.");
};
Loader.prototype.extractUrlBase = function(url) {
  console.warn("THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.");
  return LoaderUtils.extractUrlBase(url);
};
Loader.Handlers = {
  add: function() {
    console.error("THREE.Loader: Handlers.add() has been removed. Use LoadingManager.addHandler() instead.");
  },
  get: function() {
    console.error("THREE.Loader: Handlers.get() has been removed. Use LoadingManager.getHandler() instead.");
  }
};
Box3.prototype.center = function(optionalTarget) {
  console.warn("THREE.Box3: .center() has been renamed to .getCenter().");
  return this.getCenter(optionalTarget);
};
Box3.prototype.empty = function() {
  console.warn("THREE.Box3: .empty() has been renamed to .isEmpty().");
  return this.isEmpty();
};
Box3.prototype.isIntersectionBox = function(box) {
  console.warn("THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().");
  return this.intersectsBox(box);
};
Box3.prototype.isIntersectionSphere = function(sphere) {
  console.warn("THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().");
  return this.intersectsSphere(sphere);
};
Box3.prototype.size = function(optionalTarget) {
  console.warn("THREE.Box3: .size() has been renamed to .getSize().");
  return this.getSize(optionalTarget);
};
Sphere.prototype.empty = function() {
  console.warn("THREE.Sphere: .empty() has been renamed to .isEmpty().");
  return this.isEmpty();
};
Frustum.prototype.setFromMatrix = function(m) {
  console.warn("THREE.Frustum: .setFromMatrix() has been renamed to .setFromProjectionMatrix().");
  return this.setFromProjectionMatrix(m);
};
Matrix3$1.prototype.flattenToArrayOffset = function(array, offset) {
  console.warn("THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.");
  return this.toArray(array, offset);
};
Matrix3$1.prototype.multiplyVector3 = function(vector) {
  console.warn("THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.");
  return vector.applyMatrix3(this);
};
Matrix3$1.prototype.multiplyVector3Array = function() {
  console.error("THREE.Matrix3: .multiplyVector3Array() has been removed.");
};
Matrix3$1.prototype.applyToBufferAttribute = function(attribute) {
  console.warn("THREE.Matrix3: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix3( matrix ) instead.");
  return attribute.applyMatrix3(this);
};
Matrix3$1.prototype.applyToVector3Array = function() {
  console.error("THREE.Matrix3: .applyToVector3Array() has been removed.");
};
Matrix3$1.prototype.getInverse = function(matrix) {
  console.warn("THREE.Matrix3: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.");
  return this.copy(matrix).invert();
};
Matrix4$1.prototype.extractPosition = function(m) {
  console.warn("THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().");
  return this.copyPosition(m);
};
Matrix4$1.prototype.flattenToArrayOffset = function(array, offset) {
  console.warn("THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.");
  return this.toArray(array, offset);
};
Matrix4$1.prototype.getPosition = function() {
  console.warn("THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.");
  return new Vector3$1().setFromMatrixColumn(this, 3);
};
Matrix4$1.prototype.setRotationFromQuaternion = function(q) {
  console.warn("THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().");
  return this.makeRotationFromQuaternion(q);
};
Matrix4$1.prototype.multiplyToArray = function() {
  console.warn("THREE.Matrix4: .multiplyToArray() has been removed.");
};
Matrix4$1.prototype.multiplyVector3 = function(vector) {
  console.warn("THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.");
  return vector.applyMatrix4(this);
};
Matrix4$1.prototype.multiplyVector4 = function(vector) {
  console.warn("THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.");
  return vector.applyMatrix4(this);
};
Matrix4$1.prototype.multiplyVector3Array = function() {
  console.error("THREE.Matrix4: .multiplyVector3Array() has been removed.");
};
Matrix4$1.prototype.rotateAxis = function(v) {
  console.warn("THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.");
  v.transformDirection(this);
};
Matrix4$1.prototype.crossVector = function(vector) {
  console.warn("THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.");
  return vector.applyMatrix4(this);
};
Matrix4$1.prototype.translate = function() {
  console.error("THREE.Matrix4: .translate() has been removed.");
};
Matrix4$1.prototype.rotateX = function() {
  console.error("THREE.Matrix4: .rotateX() has been removed.");
};
Matrix4$1.prototype.rotateY = function() {
  console.error("THREE.Matrix4: .rotateY() has been removed.");
};
Matrix4$1.prototype.rotateZ = function() {
  console.error("THREE.Matrix4: .rotateZ() has been removed.");
};
Matrix4$1.prototype.rotateByAxis = function() {
  console.error("THREE.Matrix4: .rotateByAxis() has been removed.");
};
Matrix4$1.prototype.applyToBufferAttribute = function(attribute) {
  console.warn("THREE.Matrix4: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix4( matrix ) instead.");
  return attribute.applyMatrix4(this);
};
Matrix4$1.prototype.applyToVector3Array = function() {
  console.error("THREE.Matrix4: .applyToVector3Array() has been removed.");
};
Matrix4$1.prototype.makeFrustum = function(left, right, bottom, top, near, far) {
  console.warn("THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.");
  return this.makePerspective(left, right, top, bottom, near, far);
};
Matrix4$1.prototype.getInverse = function(matrix) {
  console.warn("THREE.Matrix4: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.");
  return this.copy(matrix).invert();
};
Plane$1.prototype.isIntersectionLine = function(line) {
  console.warn("THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().");
  return this.intersectsLine(line);
};
Quaternion$1.prototype.multiplyVector3 = function(vector) {
  console.warn("THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.");
  return vector.applyQuaternion(this);
};
Quaternion$1.prototype.inverse = function() {
  console.warn("THREE.Quaternion: .inverse() has been renamed to invert().");
  return this.invert();
};
Ray.prototype.isIntersectionBox = function(box) {
  console.warn("THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().");
  return this.intersectsBox(box);
};
Ray.prototype.isIntersectionPlane = function(plane) {
  console.warn("THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().");
  return this.intersectsPlane(plane);
};
Ray.prototype.isIntersectionSphere = function(sphere) {
  console.warn("THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().");
  return this.intersectsSphere(sphere);
};
Triangle.prototype.area = function() {
  console.warn("THREE.Triangle: .area() has been renamed to .getArea().");
  return this.getArea();
};
Triangle.prototype.barycoordFromPoint = function(point, target) {
  console.warn("THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().");
  return this.getBarycoord(point, target);
};
Triangle.prototype.midpoint = function(target) {
  console.warn("THREE.Triangle: .midpoint() has been renamed to .getMidpoint().");
  return this.getMidpoint(target);
};
Triangle.prototypenormal = function(target) {
  console.warn("THREE.Triangle: .normal() has been renamed to .getNormal().");
  return this.getNormal(target);
};
Triangle.prototype.plane = function(target) {
  console.warn("THREE.Triangle: .plane() has been renamed to .getPlane().");
  return this.getPlane(target);
};
Triangle.barycoordFromPoint = function(point, a, b, c, target) {
  console.warn("THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().");
  return Triangle.getBarycoord(point, a, b, c, target);
};
Triangle.normal = function(a, b, c, target) {
  console.warn("THREE.Triangle: .normal() has been renamed to .getNormal().");
  return Triangle.getNormal(a, b, c, target);
};
Shape.prototype.extractAllPoints = function(divisions) {
  console.warn("THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.");
  return this.extractPoints(divisions);
};
Shape.prototype.extrude = function(options) {
  console.warn("THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.");
  return new ExtrudeGeometry(this, options);
};
Shape.prototype.makeGeometry = function(options) {
  console.warn("THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.");
  return new ShapeGeometry(this, options);
};
Vector2$1.prototype.fromAttribute = function(attribute, index, offset) {
  console.warn("THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().");
  return this.fromBufferAttribute(attribute, index, offset);
};
Vector2$1.prototype.distanceToManhattan = function(v) {
  console.warn("THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().");
  return this.manhattanDistanceTo(v);
};
Vector2$1.prototype.lengthManhattan = function() {
  console.warn("THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().");
  return this.manhattanLength();
};
Vector3$1.prototype.setEulerFromRotationMatrix = function() {
  console.error("THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.");
};
Vector3$1.prototype.setEulerFromQuaternion = function() {
  console.error("THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.");
};
Vector3$1.prototype.getPositionFromMatrix = function(m) {
  console.warn("THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().");
  return this.setFromMatrixPosition(m);
};
Vector3$1.prototype.getScaleFromMatrix = function(m) {
  console.warn("THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().");
  return this.setFromMatrixScale(m);
};
Vector3$1.prototype.getColumnFromMatrix = function(index, matrix) {
  console.warn("THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().");
  return this.setFromMatrixColumn(matrix, index);
};
Vector3$1.prototype.applyProjection = function(m) {
  console.warn("THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.");
  return this.applyMatrix4(m);
};
Vector3$1.prototype.fromAttribute = function(attribute, index, offset) {
  console.warn("THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().");
  return this.fromBufferAttribute(attribute, index, offset);
};
Vector3$1.prototype.distanceToManhattan = function(v) {
  console.warn("THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().");
  return this.manhattanDistanceTo(v);
};
Vector3$1.prototype.lengthManhattan = function() {
  console.warn("THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().");
  return this.manhattanLength();
};
Vector4$1.prototype.fromAttribute = function(attribute, index, offset) {
  console.warn("THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().");
  return this.fromBufferAttribute(attribute, index, offset);
};
Vector4$1.prototype.lengthManhattan = function() {
  console.warn("THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().");
  return this.manhattanLength();
};
Object3D.prototype.getChildByName = function(name) {
  console.warn("THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().");
  return this.getObjectByName(name);
};
Object3D.prototype.renderDepth = function() {
  console.warn("THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.");
};
Object3D.prototype.translate = function(distance, axis) {
  console.warn("THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.");
  return this.translateOnAxis(axis, distance);
};
Object3D.prototype.getWorldRotation = function() {
  console.error("THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.");
};
Object3D.prototype.applyMatrix = function(matrix) {
  console.warn("THREE.Object3D: .applyMatrix() has been renamed to .applyMatrix4().");
  return this.applyMatrix4(matrix);
};
Object.defineProperties(Object3D.prototype, {
  eulerOrder: {
    get: function() {
      console.warn("THREE.Object3D: .eulerOrder is now .rotation.order.");
      return this.rotation.order;
    },
    set: function(value) {
      console.warn("THREE.Object3D: .eulerOrder is now .rotation.order.");
      this.rotation.order = value;
    }
  },
  useQuaternion: {
    get: function() {
      console.warn("THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.");
    },
    set: function() {
      console.warn("THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.");
    }
  }
});
Mesh.prototype.setDrawMode = function() {
  console.error("THREE.Mesh: .setDrawMode() has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.");
};
Object.defineProperties(Mesh.prototype, {
  drawMode: {
    get: function() {
      console.error("THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode.");
      return TrianglesDrawMode;
    },
    set: function() {
      console.error("THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.");
    }
  }
});
SkinnedMesh.prototype.initBones = function() {
  console.error("THREE.SkinnedMesh: initBones() has been removed.");
};
PerspectiveCamera.prototype.setLens = function(focalLength, filmGauge) {
  console.warn("THREE.PerspectiveCamera.setLens is deprecated. Use .setFocalLength and .filmGauge for a photographic setup.");
  if (filmGauge !== void 0)
    this.filmGauge = filmGauge;
  this.setFocalLength(focalLength);
};
Object.defineProperties(Light.prototype, {
  onlyShadow: {
    set: function() {
      console.warn("THREE.Light: .onlyShadow has been removed.");
    }
  },
  shadowCameraFov: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraFov is now .shadow.camera.fov.");
      this.shadow.camera.fov = value;
    }
  },
  shadowCameraLeft: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraLeft is now .shadow.camera.left.");
      this.shadow.camera.left = value;
    }
  },
  shadowCameraRight: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraRight is now .shadow.camera.right.");
      this.shadow.camera.right = value;
    }
  },
  shadowCameraTop: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraTop is now .shadow.camera.top.");
      this.shadow.camera.top = value;
    }
  },
  shadowCameraBottom: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.");
      this.shadow.camera.bottom = value;
    }
  },
  shadowCameraNear: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraNear is now .shadow.camera.near.");
      this.shadow.camera.near = value;
    }
  },
  shadowCameraFar: {
    set: function(value) {
      console.warn("THREE.Light: .shadowCameraFar is now .shadow.camera.far.");
      this.shadow.camera.far = value;
    }
  },
  shadowCameraVisible: {
    set: function() {
      console.warn("THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.");
    }
  },
  shadowBias: {
    set: function(value) {
      console.warn("THREE.Light: .shadowBias is now .shadow.bias.");
      this.shadow.bias = value;
    }
  },
  shadowDarkness: {
    set: function() {
      console.warn("THREE.Light: .shadowDarkness has been removed.");
    }
  },
  shadowMapWidth: {
    set: function(value) {
      console.warn("THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.");
      this.shadow.mapSize.width = value;
    }
  },
  shadowMapHeight: {
    set: function(value) {
      console.warn("THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.");
      this.shadow.mapSize.height = value;
    }
  }
});
Object.defineProperties(BufferAttribute.prototype, {
  length: {
    get: function() {
      console.warn("THREE.BufferAttribute: .length has been deprecated. Use .count instead.");
      return this.array.length;
    }
  },
  dynamic: {
    get: function() {
      console.warn("THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.");
      return this.usage === DynamicDrawUsage;
    },
    set: function() {
      console.warn("THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.");
      this.setUsage(DynamicDrawUsage);
    }
  }
});
BufferAttribute.prototype.setDynamic = function(value) {
  console.warn("THREE.BufferAttribute: .setDynamic() has been deprecated. Use .setUsage() instead.");
  this.setUsage(value === true ? DynamicDrawUsage : StaticDrawUsage);
  return this;
};
BufferAttribute.prototype.copyIndicesArray = function() {
  console.error("THREE.BufferAttribute: .copyIndicesArray() has been removed.");
}, BufferAttribute.prototype.setArray = function() {
  console.error("THREE.BufferAttribute: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers");
};
BufferGeometry.prototype.addIndex = function(index) {
  console.warn("THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().");
  this.setIndex(index);
};
BufferGeometry.prototype.addAttribute = function(name, attribute) {
  console.warn("THREE.BufferGeometry: .addAttribute() has been renamed to .setAttribute().");
  if (!(attribute && attribute.isBufferAttribute) && !(attribute && attribute.isInterleavedBufferAttribute)) {
    console.warn("THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).");
    return this.setAttribute(name, new BufferAttribute(arguments[1], arguments[2]));
  }
  if (name === "index") {
    console.warn("THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.");
    this.setIndex(attribute);
    return this;
  }
  return this.setAttribute(name, attribute);
};
BufferGeometry.prototype.addDrawCall = function(start, count, indexOffset) {
  if (indexOffset !== void 0) {
    console.warn("THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.");
  }
  console.warn("THREE.BufferGeometry: .addDrawCall() is now .addGroup().");
  this.addGroup(start, count);
};
BufferGeometry.prototype.clearDrawCalls = function() {
  console.warn("THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().");
  this.clearGroups();
};
BufferGeometry.prototype.computeOffsets = function() {
  console.warn("THREE.BufferGeometry: .computeOffsets() has been removed.");
};
BufferGeometry.prototype.removeAttribute = function(name) {
  console.warn("THREE.BufferGeometry: .removeAttribute() has been renamed to .deleteAttribute().");
  return this.deleteAttribute(name);
};
BufferGeometry.prototype.applyMatrix = function(matrix) {
  console.warn("THREE.BufferGeometry: .applyMatrix() has been renamed to .applyMatrix4().");
  return this.applyMatrix4(matrix);
};
Object.defineProperties(BufferGeometry.prototype, {
  drawcalls: {
    get: function() {
      console.error("THREE.BufferGeometry: .drawcalls has been renamed to .groups.");
      return this.groups;
    }
  },
  offsets: {
    get: function() {
      console.warn("THREE.BufferGeometry: .offsets has been renamed to .groups.");
      return this.groups;
    }
  }
});
InterleavedBuffer.prototype.setDynamic = function(value) {
  console.warn("THREE.InterleavedBuffer: .setDynamic() has been deprecated. Use .setUsage() instead.");
  this.setUsage(value === true ? DynamicDrawUsage : StaticDrawUsage);
  return this;
};
InterleavedBuffer.prototype.setArray = function() {
  console.error("THREE.InterleavedBuffer: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers");
};
ExtrudeGeometry.prototype.getArrays = function() {
  console.error("THREE.ExtrudeGeometry: .getArrays() has been removed.");
};
ExtrudeGeometry.prototype.addShapeList = function() {
  console.error("THREE.ExtrudeGeometry: .addShapeList() has been removed.");
};
ExtrudeGeometry.prototype.addShape = function() {
  console.error("THREE.ExtrudeGeometry: .addShape() has been removed.");
};
Scene.prototype.dispose = function() {
  console.error("THREE.Scene: .dispose() has been removed.");
};
Object.defineProperties(Material.prototype, {
  wrapAround: {
    get: function() {
      console.warn("THREE.Material: .wrapAround has been removed.");
    },
    set: function() {
      console.warn("THREE.Material: .wrapAround has been removed.");
    }
  },
  overdraw: {
    get: function() {
      console.warn("THREE.Material: .overdraw has been removed.");
    },
    set: function() {
      console.warn("THREE.Material: .overdraw has been removed.");
    }
  },
  wrapRGB: {
    get: function() {
      console.warn("THREE.Material: .wrapRGB has been removed.");
      return new Color();
    }
  },
  shading: {
    get: function() {
      console.error("THREE." + this.type + ": .shading has been removed. Use the boolean .flatShading instead.");
    },
    set: function(value) {
      console.warn("THREE." + this.type + ": .shading has been removed. Use the boolean .flatShading instead.");
      this.flatShading = value === FlatShading;
    }
  },
  stencilMask: {
    get: function() {
      console.warn("THREE." + this.type + ": .stencilMask has been removed. Use .stencilFuncMask instead.");
      return this.stencilFuncMask;
    },
    set: function(value) {
      console.warn("THREE." + this.type + ": .stencilMask has been removed. Use .stencilFuncMask instead.");
      this.stencilFuncMask = value;
    }
  },
  vertexTangents: {
    get: function() {
      console.warn("THREE." + this.type + ": .vertexTangents has been removed.");
    },
    set: function() {
      console.warn("THREE." + this.type + ": .vertexTangents has been removed.");
    }
  }
});
Object.defineProperties(ShaderMaterial.prototype, {
  derivatives: {
    get: function() {
      console.warn("THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.");
      return this.extensions.derivatives;
    },
    set: function(value) {
      console.warn("THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.");
      this.extensions.derivatives = value;
    }
  }
});
WebGLRenderer.prototype.clearTarget = function(renderTarget, color, depth, stencil) {
  console.warn("THREE.WebGLRenderer: .clearTarget() has been deprecated. Use .setRenderTarget() and .clear() instead.");
  this.setRenderTarget(renderTarget);
  this.clear(color, depth, stencil);
};
WebGLRenderer.prototype.animate = function(callback) {
  console.warn("THREE.WebGLRenderer: .animate() is now .setAnimationLoop().");
  this.setAnimationLoop(callback);
};
WebGLRenderer.prototype.getCurrentRenderTarget = function() {
  console.warn("THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().");
  return this.getRenderTarget();
};
WebGLRenderer.prototype.getMaxAnisotropy = function() {
  console.warn("THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().");
  return this.capabilities.getMaxAnisotropy();
};
WebGLRenderer.prototype.getPrecision = function() {
  console.warn("THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.");
  return this.capabilities.precision;
};
WebGLRenderer.prototype.resetGLState = function() {
  console.warn("THREE.WebGLRenderer: .resetGLState() is now .state.reset().");
  return this.state.reset();
};
WebGLRenderer.prototype.supportsFloatTextures = function() {
  console.warn("THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( 'OES_texture_float' ).");
  return this.extensions.get("OES_texture_float");
};
WebGLRenderer.prototype.supportsHalfFloatTextures = function() {
  console.warn("THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( 'OES_texture_half_float' ).");
  return this.extensions.get("OES_texture_half_float");
};
WebGLRenderer.prototype.supportsStandardDerivatives = function() {
  console.warn("THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( 'OES_standard_derivatives' ).");
  return this.extensions.get("OES_standard_derivatives");
};
WebGLRenderer.prototype.supportsCompressedTextureS3TC = function() {
  console.warn("THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( 'WEBGL_compressed_texture_s3tc' ).");
  return this.extensions.get("WEBGL_compressed_texture_s3tc");
};
WebGLRenderer.prototype.supportsCompressedTexturePVRTC = function() {
  console.warn("THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( 'WEBGL_compressed_texture_pvrtc' ).");
  return this.extensions.get("WEBGL_compressed_texture_pvrtc");
};
WebGLRenderer.prototype.supportsBlendMinMax = function() {
  console.warn("THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( 'EXT_blend_minmax' ).");
  return this.extensions.get("EXT_blend_minmax");
};
WebGLRenderer.prototype.supportsVertexTextures = function() {
  console.warn("THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.");
  return this.capabilities.vertexTextures;
};
WebGLRenderer.prototype.supportsInstancedArrays = function() {
  console.warn("THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( 'ANGLE_instanced_arrays' ).");
  return this.extensions.get("ANGLE_instanced_arrays");
};
WebGLRenderer.prototype.enableScissorTest = function(boolean) {
  console.warn("THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().");
  this.setScissorTest(boolean);
};
WebGLRenderer.prototype.initMaterial = function() {
  console.warn("THREE.WebGLRenderer: .initMaterial() has been removed.");
};
WebGLRenderer.prototype.addPrePlugin = function() {
  console.warn("THREE.WebGLRenderer: .addPrePlugin() has been removed.");
};
WebGLRenderer.prototype.addPostPlugin = function() {
  console.warn("THREE.WebGLRenderer: .addPostPlugin() has been removed.");
};
WebGLRenderer.prototype.updateShadowMap = function() {
  console.warn("THREE.WebGLRenderer: .updateShadowMap() has been removed.");
};
WebGLRenderer.prototype.setFaceCulling = function() {
  console.warn("THREE.WebGLRenderer: .setFaceCulling() has been removed.");
};
WebGLRenderer.prototype.allocTextureUnit = function() {
  console.warn("THREE.WebGLRenderer: .allocTextureUnit() has been removed.");
};
WebGLRenderer.prototype.setTexture = function() {
  console.warn("THREE.WebGLRenderer: .setTexture() has been removed.");
};
WebGLRenderer.prototype.setTexture2D = function() {
  console.warn("THREE.WebGLRenderer: .setTexture2D() has been removed.");
};
WebGLRenderer.prototype.setTextureCube = function() {
  console.warn("THREE.WebGLRenderer: .setTextureCube() has been removed.");
};
WebGLRenderer.prototype.getActiveMipMapLevel = function() {
  console.warn("THREE.WebGLRenderer: .getActiveMipMapLevel() is now .getActiveMipmapLevel().");
  return this.getActiveMipmapLevel();
};
Object.defineProperties(WebGLRenderer.prototype, {
  shadowMapEnabled: {
    get: function() {
      return this.shadowMap.enabled;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.");
      this.shadowMap.enabled = value;
    }
  },
  shadowMapType: {
    get: function() {
      return this.shadowMap.type;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.");
      this.shadowMap.type = value;
    }
  },
  shadowMapCullFace: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.");
      return void 0;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.");
    }
  },
  context: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .context has been removed. Use .getContext() instead.");
      return this.getContext();
    }
  },
  vr: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .vr has been renamed to .xr");
      return this.xr;
    }
  },
  gammaInput: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.");
      return false;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.");
    }
  },
  gammaOutput: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.");
      return false;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.");
      this.outputEncoding = value === true ? sRGBEncoding : LinearEncoding;
    }
  },
  toneMappingWhitePoint: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.");
      return 1;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.");
    }
  },
  gammaFactor: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .gammaFactor has been removed.");
      return 2;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .gammaFactor has been removed.");
    }
  }
});
Object.defineProperties(WebGLShadowMap.prototype, {
  cullFace: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.");
      return void 0;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.");
    }
  },
  renderReverseSided: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.");
      return void 0;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.");
    }
  },
  renderSingleSided: {
    get: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.");
      return void 0;
    },
    set: function() {
      console.warn("THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.");
    }
  }
});
Object.defineProperties(WebGLRenderTarget.prototype, {
  wrapS: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.");
      return this.texture.wrapS;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.");
      this.texture.wrapS = value;
    }
  },
  wrapT: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.");
      return this.texture.wrapT;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.");
      this.texture.wrapT = value;
    }
  },
  magFilter: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.");
      return this.texture.magFilter;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.");
      this.texture.magFilter = value;
    }
  },
  minFilter: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.");
      return this.texture.minFilter;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.");
      this.texture.minFilter = value;
    }
  },
  anisotropy: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.");
      return this.texture.anisotropy;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.");
      this.texture.anisotropy = value;
    }
  },
  offset: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .offset is now .texture.offset.");
      return this.texture.offset;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .offset is now .texture.offset.");
      this.texture.offset = value;
    }
  },
  repeat: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .repeat is now .texture.repeat.");
      return this.texture.repeat;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .repeat is now .texture.repeat.");
      this.texture.repeat = value;
    }
  },
  format: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .format is now .texture.format.");
      return this.texture.format;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .format is now .texture.format.");
      this.texture.format = value;
    }
  },
  type: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .type is now .texture.type.");
      return this.texture.type;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .type is now .texture.type.");
      this.texture.type = value;
    }
  },
  generateMipmaps: {
    get: function() {
      console.warn("THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.");
      return this.texture.generateMipmaps;
    },
    set: function(value) {
      console.warn("THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.");
      this.texture.generateMipmaps = value;
    }
  }
});
Audio.prototype.load = function(file) {
  console.warn("THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.");
  const scope = this;
  const audioLoader = new AudioLoader();
  audioLoader.load(file, function(buffer) {
    scope.setBuffer(buffer);
  });
  return this;
};
CubeCamera.prototype.updateCubeMap = function(renderer, scene) {
  console.warn("THREE.CubeCamera: .updateCubeMap() is now .update().");
  return this.update(renderer, scene);
};
CubeCamera.prototype.clear = function(renderer, color, depth, stencil) {
  console.warn("THREE.CubeCamera: .clear() is now .renderTarget.clear().");
  return this.renderTarget.clear(renderer, color, depth, stencil);
};
ImageUtils.crossOrigin = void 0;
ImageUtils.loadTexture = function(url, mapping, onLoad, onError) {
  console.warn("THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.");
  const loader = new TextureLoader();
  loader.setCrossOrigin(this.crossOrigin);
  const texture = loader.load(url, onLoad, void 0, onError);
  if (mapping)
    texture.mapping = mapping;
  return texture;
};
ImageUtils.loadTextureCube = function(urls, mapping, onLoad, onError) {
  console.warn("THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.");
  const loader = new CubeTextureLoader();
  loader.setCrossOrigin(this.crossOrigin);
  const texture = loader.load(urls, onLoad, void 0, onError);
  if (mapping)
    texture.mapping = mapping;
  return texture;
};
ImageUtils.loadCompressedTexture = function() {
  console.error("THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.");
};
ImageUtils.loadCompressedTextureCube = function() {
  console.error("THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.");
};
if (typeof __THREE_DEVTOOLS__ !== "undefined") {
  __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("register", {detail: {
    revision: REVISION
  }}));
}
if (typeof window !== "undefined") {
  if (window.__THREE__) {
    console.warn("WARNING: Multiple instances of Three.js being imported.");
  } else {
    window.__THREE__ = REVISION;
  }
}

// This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
//
//    Orbit - left mouse / touch: one-finger move
//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

const _changeEvent = { type: 'change' };
const _startEvent = { type: 'start' };
const _endEvent = { type: 'end' };

class OrbitControls extends EventDispatcher {

	constructor( object, domElement ) {

		super();

		if ( domElement === undefined ) console.warn( 'THREE.OrbitControls: The second parameter "domElement" is now mandatory.' );
		if ( domElement === document ) console.error( 'THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );

		this.object = object;
		this.domElement = domElement;
		this.domElement.style.touchAction = 'none'; // disable touch scroll

		// Set to false to disable this control
		this.enabled = true;

		// "target" sets the location of focus, where the object orbits around
		this.target = new Vector3$1();

		// How far you can dolly in and out ( PerspectiveCamera only )
		this.minDistance = 0;
		this.maxDistance = Infinity;

		// How far you can zoom in and out ( OrthographicCamera only )
		this.minZoom = 0;
		this.maxZoom = Infinity;

		// How far you can orbit vertically, upper and lower limits.
		// Range is 0 to Math.PI radians.
		this.minPolarAngle = 0; // radians
		this.maxPolarAngle = Math.PI; // radians

		// How far you can orbit horizontally, upper and lower limits.
		// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
		this.minAzimuthAngle = - Infinity; // radians
		this.maxAzimuthAngle = Infinity; // radians

		// Set to true to enable damping (inertia)
		// If damping is enabled, you must call controls.update() in your animation loop
		this.enableDamping = false;
		this.dampingFactor = 0.05;

		// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
		// Set to false to disable zooming
		this.enableZoom = true;
		this.zoomSpeed = 1.0;

		// Set to false to disable rotating
		this.enableRotate = true;
		this.rotateSpeed = 1.0;

		// Set to false to disable panning
		this.enablePan = true;
		this.panSpeed = 1.0;
		this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
		this.keyPanSpeed = 7.0;	// pixels moved per arrow key push

		// Set to true to automatically rotate around the target
		// If auto-rotate is enabled, you must call controls.update() in your animation loop
		this.autoRotate = false;
		this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60

		// The four arrow keys
		this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown' };

		// Mouse buttons
		this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };

		// Touch fingers
		this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };

		// for reset
		this.target0 = this.target.clone();
		this.position0 = this.object.position.clone();
		this.zoom0 = this.object.zoom;

		// the target DOM element for key events
		this._domElementKeyEvents = null;

		//
		// public methods
		//

		this.getPolarAngle = function () {

			return spherical.phi;

		};

		this.getAzimuthalAngle = function () {

			return spherical.theta;

		};

		this.getDistance = function () {

			return this.object.position.distanceTo( this.target );

		};

		this.listenToKeyEvents = function ( domElement ) {

			domElement.addEventListener( 'keydown', onKeyDown );
			this._domElementKeyEvents = domElement;

		};

		this.saveState = function () {

			scope.target0.copy( scope.target );
			scope.position0.copy( scope.object.position );
			scope.zoom0 = scope.object.zoom;

		};

		this.reset = function () {

			scope.target.copy( scope.target0 );
			scope.object.position.copy( scope.position0 );
			scope.object.zoom = scope.zoom0;

			scope.object.updateProjectionMatrix();
			scope.dispatchEvent( _changeEvent );

			scope.update();

			state = STATE.NONE;

		};

		// this method is exposed, but perhaps it would be better if we can make it private...
		this.update = function () {

			const offset = new Vector3$1();

			// so camera.up is the orbit axis
			const quat = new Quaternion$1().setFromUnitVectors( object.up, new Vector3$1( 0, 1, 0 ) );
			const quatInverse = quat.clone().invert();

			const lastPosition = new Vector3$1();
			const lastQuaternion = new Quaternion$1();

			const twoPI = 2 * Math.PI;

			return function update() {

				const position = scope.object.position;

				offset.copy( position ).sub( scope.target );

				// rotate offset to "y-axis-is-up" space
				offset.applyQuaternion( quat );

				// angle from z-axis around y-axis
				spherical.setFromVector3( offset );

				if ( scope.autoRotate && state === STATE.NONE ) {

					rotateLeft( getAutoRotationAngle() );

				}

				if ( scope.enableDamping ) {

					spherical.theta += sphericalDelta.theta * scope.dampingFactor;
					spherical.phi += sphericalDelta.phi * scope.dampingFactor;

				} else {

					spherical.theta += sphericalDelta.theta;
					spherical.phi += sphericalDelta.phi;

				}

				// restrict theta to be between desired limits

				let min = scope.minAzimuthAngle;
				let max = scope.maxAzimuthAngle;

				if ( isFinite( min ) && isFinite( max ) ) {

					if ( min < - Math.PI ) min += twoPI; else if ( min > Math.PI ) min -= twoPI;

					if ( max < - Math.PI ) max += twoPI; else if ( max > Math.PI ) max -= twoPI;

					if ( min <= max ) {

						spherical.theta = Math.max( min, Math.min( max, spherical.theta ) );

					} else {

						spherical.theta = ( spherical.theta > ( min + max ) / 2 ) ?
							Math.max( min, spherical.theta ) :
							Math.min( max, spherical.theta );

					}

				}

				// restrict phi to be between desired limits
				spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );

				spherical.makeSafe();


				spherical.radius *= scale;

				// restrict radius to be between desired limits
				spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );

				// move target to panned location

				if ( scope.enableDamping === true ) {

					scope.target.addScaledVector( panOffset, scope.dampingFactor );

				} else {

					scope.target.add( panOffset );

				}

				offset.setFromSpherical( spherical );

				// rotate offset back to "camera-up-vector-is-up" space
				offset.applyQuaternion( quatInverse );

				position.copy( scope.target ).add( offset );

				scope.object.lookAt( scope.target );

				if ( scope.enableDamping === true ) {

					sphericalDelta.theta *= ( 1 - scope.dampingFactor );
					sphericalDelta.phi *= ( 1 - scope.dampingFactor );

					panOffset.multiplyScalar( 1 - scope.dampingFactor );

				} else {

					sphericalDelta.set( 0, 0, 0 );

					panOffset.set( 0, 0, 0 );

				}

				scale = 1;

				// update condition is:
				// min(camera displacement, camera rotation in radians)^2 > EPS
				// using small-angle approximation cos(x/2) = 1 - x^2 / 8

				if ( zoomChanged ||
					lastPosition.distanceToSquared( scope.object.position ) > EPS ||
					8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {

					scope.dispatchEvent( _changeEvent );

					lastPosition.copy( scope.object.position );
					lastQuaternion.copy( scope.object.quaternion );
					zoomChanged = false;

					return true;

				}

				return false;

			};

		}();

		this.dispose = function () {

			scope.domElement.removeEventListener( 'contextmenu', onContextMenu );

			scope.domElement.removeEventListener( 'pointerdown', onPointerDown );
			scope.domElement.removeEventListener( 'pointercancel', onPointerCancel );
			scope.domElement.removeEventListener( 'wheel', onMouseWheel );

			scope.domElement.removeEventListener( 'pointermove', onPointerMove );
			scope.domElement.removeEventListener( 'pointerup', onPointerUp );


			if ( scope._domElementKeyEvents !== null ) {

				scope._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );

			}

			//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?

		};

		//
		// internals
		//

		const scope = this;

		const STATE = {
			NONE: - 1,
			ROTATE: 0,
			DOLLY: 1,
			PAN: 2,
			TOUCH_ROTATE: 3,
			TOUCH_PAN: 4,
			TOUCH_DOLLY_PAN: 5,
			TOUCH_DOLLY_ROTATE: 6
		};

		let state = STATE.NONE;

		const EPS = 0.000001;

		// current position in spherical coordinates
		const spherical = new Spherical();
		const sphericalDelta = new Spherical();

		let scale = 1;
		const panOffset = new Vector3$1();
		let zoomChanged = false;

		const rotateStart = new Vector2$1();
		const rotateEnd = new Vector2$1();
		const rotateDelta = new Vector2$1();

		const panStart = new Vector2$1();
		const panEnd = new Vector2$1();
		const panDelta = new Vector2$1();

		const dollyStart = new Vector2$1();
		const dollyEnd = new Vector2$1();
		const dollyDelta = new Vector2$1();

		const pointers = [];
		const pointerPositions = {};

		function getAutoRotationAngle() {

			return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

		}

		function getZoomScale() {

			return Math.pow( 0.95, scope.zoomSpeed );

		}

		function rotateLeft( angle ) {

			sphericalDelta.theta -= angle;

		}

		function rotateUp( angle ) {

			sphericalDelta.phi -= angle;

		}

		const panLeft = function () {

			const v = new Vector3$1();

			return function panLeft( distance, objectMatrix ) {

				v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
				v.multiplyScalar( - distance );

				panOffset.add( v );

			};

		}();

		const panUp = function () {

			const v = new Vector3$1();

			return function panUp( distance, objectMatrix ) {

				if ( scope.screenSpacePanning === true ) {

					v.setFromMatrixColumn( objectMatrix, 1 );

				} else {

					v.setFromMatrixColumn( objectMatrix, 0 );
					v.crossVectors( scope.object.up, v );

				}

				v.multiplyScalar( distance );

				panOffset.add( v );

			};

		}();

		// deltaX and deltaY are in pixels; right and down are positive
		const pan = function () {

			const offset = new Vector3$1();

			return function pan( deltaX, deltaY ) {

				const element = scope.domElement;

				if ( scope.object.isPerspectiveCamera ) {

					// perspective
					const position = scope.object.position;
					offset.copy( position ).sub( scope.target );
					let targetDistance = offset.length();

					// half of the fov is center to top of screen
					targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );

					// we use only clientHeight here so aspect ratio does not distort speed
					panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
					panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );

				} else if ( scope.object.isOrthographicCamera ) {

					// orthographic
					panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
					panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );

				} else {

					// camera neither orthographic nor perspective
					console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );
					scope.enablePan = false;

				}

			};

		}();

		function dollyOut( dollyScale ) {

			if ( scope.object.isPerspectiveCamera ) {

				scale /= dollyScale;

			} else if ( scope.object.isOrthographicCamera ) {

				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;

			} else {

				console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;

			}

		}

		function dollyIn( dollyScale ) {

			if ( scope.object.isPerspectiveCamera ) {

				scale *= dollyScale;

			} else if ( scope.object.isOrthographicCamera ) {

				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;

			} else {

				console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;

			}

		}

		//
		// event callbacks - update the object state
		//

		function handleMouseDownRotate( event ) {

			rotateStart.set( event.clientX, event.clientY );

		}

		function handleMouseDownDolly( event ) {

			dollyStart.set( event.clientX, event.clientY );

		}

		function handleMouseDownPan( event ) {

			panStart.set( event.clientX, event.clientY );

		}

		function handleMouseMoveRotate( event ) {

			rotateEnd.set( event.clientX, event.clientY );

			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );

			const element = scope.domElement;

			rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height

			rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );

			rotateStart.copy( rotateEnd );

			scope.update();

		}

		function handleMouseMoveDolly( event ) {

			dollyEnd.set( event.clientX, event.clientY );

			dollyDelta.subVectors( dollyEnd, dollyStart );

			if ( dollyDelta.y > 0 ) {

				dollyOut( getZoomScale() );

			} else if ( dollyDelta.y < 0 ) {

				dollyIn( getZoomScale() );

			}

			dollyStart.copy( dollyEnd );

			scope.update();

		}

		function handleMouseMovePan( event ) {

			panEnd.set( event.clientX, event.clientY );

			panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );

			pan( panDelta.x, panDelta.y );

			panStart.copy( panEnd );

			scope.update();

		}

		function handleMouseWheel( event ) {

			if ( event.deltaY < 0 ) {

				dollyIn( getZoomScale() );

			} else if ( event.deltaY > 0 ) {

				dollyOut( getZoomScale() );

			}

			scope.update();

		}

		function handleKeyDown( event ) {

			let needsUpdate = false;

			switch ( event.code ) {

				case scope.keys.UP:
					pan( 0, scope.keyPanSpeed );
					needsUpdate = true;
					break;

				case scope.keys.BOTTOM:
					pan( 0, - scope.keyPanSpeed );
					needsUpdate = true;
					break;

				case scope.keys.LEFT:
					pan( scope.keyPanSpeed, 0 );
					needsUpdate = true;
					break;

				case scope.keys.RIGHT:
					pan( - scope.keyPanSpeed, 0 );
					needsUpdate = true;
					break;

			}

			if ( needsUpdate ) {

				// prevent the browser from scrolling on cursor keys
				event.preventDefault();

				scope.update();

			}


		}

		function handleTouchStartRotate() {

			if ( pointers.length === 1 ) {

				rotateStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );

			} else {

				const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
				const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );

				rotateStart.set( x, y );

			}

		}

		function handleTouchStartPan() {

			if ( pointers.length === 1 ) {

				panStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );

			} else {

				const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
				const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );

				panStart.set( x, y );

			}

		}

		function handleTouchStartDolly() {

			const dx = pointers[ 0 ].pageX - pointers[ 1 ].pageX;
			const dy = pointers[ 0 ].pageY - pointers[ 1 ].pageY;

			const distance = Math.sqrt( dx * dx + dy * dy );

			dollyStart.set( 0, distance );

		}

		function handleTouchStartDollyPan() {

			if ( scope.enableZoom ) handleTouchStartDolly();

			if ( scope.enablePan ) handleTouchStartPan();

		}

		function handleTouchStartDollyRotate() {

			if ( scope.enableZoom ) handleTouchStartDolly();

			if ( scope.enableRotate ) handleTouchStartRotate();

		}

		function handleTouchMoveRotate( event ) {

			if ( pointers.length == 1 ) {

				rotateEnd.set( event.pageX, event.pageY );

			} else {

				const position = getSecondPointerPosition( event );

				const x = 0.5 * ( event.pageX + position.x );
				const y = 0.5 * ( event.pageY + position.y );

				rotateEnd.set( x, y );

			}

			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );

			const element = scope.domElement;

			rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height

			rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );

			rotateStart.copy( rotateEnd );

		}

		function handleTouchMovePan( event ) {

			if ( pointers.length === 1 ) {

				panEnd.set( event.pageX, event.pageY );

			} else {

				const position = getSecondPointerPosition( event );

				const x = 0.5 * ( event.pageX + position.x );
				const y = 0.5 * ( event.pageY + position.y );

				panEnd.set( x, y );

			}

			panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );

			pan( panDelta.x, panDelta.y );

			panStart.copy( panEnd );

		}

		function handleTouchMoveDolly( event ) {

			const position = getSecondPointerPosition( event );

			const dx = event.pageX - position.x;
			const dy = event.pageY - position.y;

			const distance = Math.sqrt( dx * dx + dy * dy );

			dollyEnd.set( 0, distance );

			dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );

			dollyOut( dollyDelta.y );

			dollyStart.copy( dollyEnd );

		}

		function handleTouchMoveDollyPan( event ) {

			if ( scope.enableZoom ) handleTouchMoveDolly( event );

			if ( scope.enablePan ) handleTouchMovePan( event );

		}

		function handleTouchMoveDollyRotate( event ) {

			if ( scope.enableZoom ) handleTouchMoveDolly( event );

			if ( scope.enableRotate ) handleTouchMoveRotate( event );

		}

		//
		// event handlers - FSM: listen for events and reset state
		//

		function onPointerDown( event ) {

			if ( scope.enabled === false ) return;

			if ( pointers.length === 0 ) {

				scope.domElement.setPointerCapture( event.pointerId );

				scope.domElement.addEventListener( 'pointermove', onPointerMove );
				scope.domElement.addEventListener( 'pointerup', onPointerUp );

			}

			//

			addPointer( event );

			if ( event.pointerType === 'touch' ) {

				onTouchStart( event );

			} else {

				onMouseDown( event );

			}

		}

		function onPointerMove( event ) {

			if ( scope.enabled === false ) return;

			if ( event.pointerType === 'touch' ) {

				onTouchMove( event );

			} else {

				onMouseMove( event );

			}

		}

		function onPointerUp( event ) {

		    removePointer( event );

		    if ( pointers.length === 0 ) {

		        scope.domElement.releasePointerCapture( event.pointerId );

		        scope.domElement.removeEventListener( 'pointermove', onPointerMove );
		        scope.domElement.removeEventListener( 'pointerup', onPointerUp );

		    }

		    scope.dispatchEvent( _endEvent );

		    state = STATE.NONE;

		}

		function onPointerCancel( event ) {

			removePointer( event );

		}

		function onMouseDown( event ) {

			let mouseAction;

			switch ( event.button ) {

				case 0:

					mouseAction = scope.mouseButtons.LEFT;
					break;

				case 1:

					mouseAction = scope.mouseButtons.MIDDLE;
					break;

				case 2:

					mouseAction = scope.mouseButtons.RIGHT;
					break;

				default:

					mouseAction = - 1;

			}

			switch ( mouseAction ) {

				case MOUSE.DOLLY:

					if ( scope.enableZoom === false ) return;

					handleMouseDownDolly( event );

					state = STATE.DOLLY;

					break;

				case MOUSE.ROTATE:

					if ( event.ctrlKey || event.metaKey || event.shiftKey ) {

						if ( scope.enablePan === false ) return;

						handleMouseDownPan( event );

						state = STATE.PAN;

					} else {

						if ( scope.enableRotate === false ) return;

						handleMouseDownRotate( event );

						state = STATE.ROTATE;

					}

					break;

				case MOUSE.PAN:

					if ( event.ctrlKey || event.metaKey || event.shiftKey ) {

						if ( scope.enableRotate === false ) return;

						handleMouseDownRotate( event );

						state = STATE.ROTATE;

					} else {

						if ( scope.enablePan === false ) return;

						handleMouseDownPan( event );

						state = STATE.PAN;

					}

					break;

				default:

					state = STATE.NONE;

			}

			if ( state !== STATE.NONE ) {

				scope.dispatchEvent( _startEvent );

			}

		}

		function onMouseMove( event ) {

			if ( scope.enabled === false ) return;

			switch ( state ) {

				case STATE.ROTATE:

					if ( scope.enableRotate === false ) return;

					handleMouseMoveRotate( event );

					break;

				case STATE.DOLLY:

					if ( scope.enableZoom === false ) return;

					handleMouseMoveDolly( event );

					break;

				case STATE.PAN:

					if ( scope.enablePan === false ) return;

					handleMouseMovePan( event );

					break;

			}

		}

		function onMouseWheel( event ) {

			if ( scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE ) return;

			event.preventDefault();

			scope.dispatchEvent( _startEvent );

			handleMouseWheel( event );

			scope.dispatchEvent( _endEvent );

		}

		function onKeyDown( event ) {

			if ( scope.enabled === false || scope.enablePan === false ) return;

			handleKeyDown( event );

		}

		function onTouchStart( event ) {

			trackPointer( event );

			switch ( pointers.length ) {

				case 1:

					switch ( scope.touches.ONE ) {

						case TOUCH.ROTATE:

							if ( scope.enableRotate === false ) return;

							handleTouchStartRotate();

							state = STATE.TOUCH_ROTATE;

							break;

						case TOUCH.PAN:

							if ( scope.enablePan === false ) return;

							handleTouchStartPan();

							state = STATE.TOUCH_PAN;

							break;

						default:

							state = STATE.NONE;

					}

					break;

				case 2:

					switch ( scope.touches.TWO ) {

						case TOUCH.DOLLY_PAN:

							if ( scope.enableZoom === false && scope.enablePan === false ) return;

							handleTouchStartDollyPan();

							state = STATE.TOUCH_DOLLY_PAN;

							break;

						case TOUCH.DOLLY_ROTATE:

							if ( scope.enableZoom === false && scope.enableRotate === false ) return;

							handleTouchStartDollyRotate();

							state = STATE.TOUCH_DOLLY_ROTATE;

							break;

						default:

							state = STATE.NONE;

					}

					break;

				default:

					state = STATE.NONE;

			}

			if ( state !== STATE.NONE ) {

				scope.dispatchEvent( _startEvent );

			}

		}

		function onTouchMove( event ) {

			trackPointer( event );

			switch ( state ) {

				case STATE.TOUCH_ROTATE:

					if ( scope.enableRotate === false ) return;

					handleTouchMoveRotate( event );

					scope.update();

					break;

				case STATE.TOUCH_PAN:

					if ( scope.enablePan === false ) return;

					handleTouchMovePan( event );

					scope.update();

					break;

				case STATE.TOUCH_DOLLY_PAN:

					if ( scope.enableZoom === false && scope.enablePan === false ) return;

					handleTouchMoveDollyPan( event );

					scope.update();

					break;

				case STATE.TOUCH_DOLLY_ROTATE:

					if ( scope.enableZoom === false && scope.enableRotate === false ) return;

					handleTouchMoveDollyRotate( event );

					scope.update();

					break;

				default:

					state = STATE.NONE;

			}

		}

		function onContextMenu( event ) {

			if ( scope.enabled === false ) return;

			event.preventDefault();

		}

		function addPointer( event ) {

			pointers.push( event );

		}

		function removePointer( event ) {

			delete pointerPositions[ event.pointerId ];

			for ( let i = 0; i < pointers.length; i ++ ) {

				if ( pointers[ i ].pointerId == event.pointerId ) {

					pointers.splice( i, 1 );
					return;

				}

			}

		}

		function trackPointer( event ) {

			let position = pointerPositions[ event.pointerId ];

			if ( position === undefined ) {

				position = new Vector2$1();
				pointerPositions[ event.pointerId ] = position;

			}

			position.set( event.pageX, event.pageY );

		}

		function getSecondPointerPosition( event ) {

			const pointer = ( event.pointerId === pointers[ 0 ].pointerId ) ? pointers[ 1 ] : pointers[ 0 ];

			return pointerPositions[ pointer.pointerId ];

		}

		//

		scope.domElement.addEventListener( 'contextmenu', onContextMenu );

		scope.domElement.addEventListener( 'pointerdown', onPointerDown );
		scope.domElement.addEventListener( 'pointercancel', onPointerCancel );
		scope.domElement.addEventListener( 'wheel', onMouseWheel, { passive: false } );

		// force an update at start

		this.update();

	}

}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }
  return self;
}
function _inheritsLoose(subClass, superClass) {
  subClass.prototype = Object.create(superClass.prototype);
  subClass.prototype.constructor = subClass;
  subClass.__proto__ = superClass;
}
/*!
 * GSAP 3.10.4
 * https://greensock.com
 *
 * @license Copyright 2008-2022, GreenSock. All rights reserved.
 * Subject to the terms at https://greensock.com/standard-license or for
 * Club GreenSock members, the agreement issued with that membership.
 * @author: Jack Doyle, jack@greensock.com
*/
var _config = {
  autoSleep: 120,
  force3D: "auto",
  nullTargetWarn: 1,
  units: {
    lineHeight: ""
  }
}, _defaults = {
  duration: 0.5,
  overwrite: false,
  delay: 0
}, _suppressOverwrites, _bigNum = 1e8, _tinyNum = 1 / _bigNum, _2PI = Math.PI * 2, _HALF_PI = _2PI / 4, _gsID = 0, _sqrt = Math.sqrt, _cos = Math.cos, _sin = Math.sin, _isString = function _isString2(value) {
  return typeof value === "string";
}, _isFunction = function _isFunction2(value) {
  return typeof value === "function";
}, _isNumber = function _isNumber2(value) {
  return typeof value === "number";
}, _isUndefined = function _isUndefined2(value) {
  return typeof value === "undefined";
}, _isObject = function _isObject2(value) {
  return typeof value === "object";
}, _isNotFalse = function _isNotFalse2(value) {
  return value !== false;
}, _windowExists = function _windowExists2() {
  return typeof window !== "undefined";
}, _isFuncOrString = function _isFuncOrString2(value) {
  return _isFunction(value) || _isString(value);
}, _isTypedArray = typeof ArrayBuffer === "function" && ArrayBuffer.isView || function() {
}, _isArray = Array.isArray, _strictNumExp = /(?:-?\.?\d|\.)+/gi, _numExp = /[-+=.]*\d+[.e\-+]*\d*[e\-+]*\d*/g, _numWithUnitExp = /[-+=.]*\d+[.e-]*\d*[a-z%]*/g, _complexStringNumExp = /[-+=.]*\d+\.?\d*(?:e-|e\+)?\d*/gi, _relExp = /[+-]=-?[.\d]+/, _delimitedValueExp = /[^,'"\[\]\s]+/gi, _unitExp = /^[+\-=e\s\d]*\d+[.\d]*([a-z]*|%)\s*$/i, _globalTimeline, _win, _coreInitted, _doc, _globals = {}, _installScope = {}, _coreReady, _install = function _install2(scope) {
  return (_installScope = _merge(scope, _globals)) && gsap;
}, _missingPlugin = function _missingPlugin2(property, value) {
  return console.warn("Invalid property", property, "set to", value, "Missing plugin? gsap.registerPlugin()");
}, _warn = function _warn2(message, suppress) {
  return !suppress && console.warn(message);
}, _addGlobal = function _addGlobal2(name, obj) {
  return name && (_globals[name] = obj) && _installScope && (_installScope[name] = obj) || _globals;
}, _emptyFunc = function _emptyFunc2() {
  return 0;
}, _reservedProps = {}, _lazyTweens = [], _lazyLookup = {}, _lastRenderedFrame, _plugins = {}, _effects = {}, _nextGCFrame = 30, _harnessPlugins = [], _callbackNames = "", _harness = function _harness2(targets) {
  var target = targets[0], harnessPlugin, i;
  _isObject(target) || _isFunction(target) || (targets = [targets]);
  if (!(harnessPlugin = (target._gsap || {}).harness)) {
    i = _harnessPlugins.length;
    while (i-- && !_harnessPlugins[i].targetTest(target)) {
    }
    harnessPlugin = _harnessPlugins[i];
  }
  i = targets.length;
  while (i--) {
    targets[i] && (targets[i]._gsap || (targets[i]._gsap = new GSCache(targets[i], harnessPlugin))) || targets.splice(i, 1);
  }
  return targets;
}, _getCache = function _getCache2(target) {
  return target._gsap || _harness(toArray(target))[0]._gsap;
}, _getProperty = function _getProperty2(target, property, v) {
  return (v = target[property]) && _isFunction(v) ? target[property]() : _isUndefined(v) && target.getAttribute && target.getAttribute(property) || v;
}, _forEachName = function _forEachName2(names, func) {
  return (names = names.split(",")).forEach(func) || names;
}, _round = function _round2(value) {
  return Math.round(value * 1e5) / 1e5 || 0;
}, _roundPrecise = function _roundPrecise2(value) {
  return Math.round(value * 1e7) / 1e7 || 0;
}, _parseRelative = function _parseRelative2(start, value) {
  var operator = value.charAt(0), end = parseFloat(value.substr(2));
  start = parseFloat(start);
  return operator === "+" ? start + end : operator === "-" ? start - end : operator === "*" ? start * end : start / end;
}, _arrayContainsAny = function _arrayContainsAny2(toSearch, toFind) {
  var l = toFind.length, i = 0;
  for (; toSearch.indexOf(toFind[i]) < 0 && ++i < l; ) {
  }
  return i < l;
}, _lazyRender = function _lazyRender2() {
  var l = _lazyTweens.length, a = _lazyTweens.slice(0), i, tween;
  _lazyLookup = {};
  _lazyTweens.length = 0;
  for (i = 0; i < l; i++) {
    tween = a[i];
    tween && tween._lazy && (tween.render(tween._lazy[0], tween._lazy[1], true)._lazy = 0);
  }
}, _lazySafeRender = function _lazySafeRender2(animation, time, suppressEvents, force) {
  _lazyTweens.length && _lazyRender();
  animation.render(time, suppressEvents, force);
  _lazyTweens.length && _lazyRender();
}, _numericIfPossible = function _numericIfPossible2(value) {
  var n = parseFloat(value);
  return (n || n === 0) && (value + "").match(_delimitedValueExp).length < 2 ? n : _isString(value) ? value.trim() : value;
}, _passThrough = function _passThrough2(p) {
  return p;
}, _setDefaults = function _setDefaults2(obj, defaults2) {
  for (var p in defaults2) {
    p in obj || (obj[p] = defaults2[p]);
  }
  return obj;
}, _setKeyframeDefaults = function _setKeyframeDefaults2(excludeDuration) {
  return function(obj, defaults2) {
    for (var p in defaults2) {
      p in obj || p === "duration" && excludeDuration || p === "ease" || (obj[p] = defaults2[p]);
    }
  };
}, _merge = function _merge2(base, toMerge) {
  for (var p in toMerge) {
    base[p] = toMerge[p];
  }
  return base;
}, _mergeDeep = function _mergeDeep2(base, toMerge) {
  for (var p in toMerge) {
    p !== "__proto__" && p !== "constructor" && p !== "prototype" && (base[p] = _isObject(toMerge[p]) ? _mergeDeep2(base[p] || (base[p] = {}), toMerge[p]) : toMerge[p]);
  }
  return base;
}, _copyExcluding = function _copyExcluding2(obj, excluding) {
  var copy = {}, p;
  for (p in obj) {
    p in excluding || (copy[p] = obj[p]);
  }
  return copy;
}, _inheritDefaults = function _inheritDefaults2(vars) {
  var parent = vars.parent || _globalTimeline, func = vars.keyframes ? _setKeyframeDefaults(_isArray(vars.keyframes)) : _setDefaults;
  if (_isNotFalse(vars.inherit)) {
    while (parent) {
      func(vars, parent.vars.defaults);
      parent = parent.parent || parent._dp;
    }
  }
  return vars;
}, _arraysMatch = function _arraysMatch2(a1, a2) {
  var i = a1.length, match = i === a2.length;
  while (match && i-- && a1[i] === a2[i]) {
  }
  return i < 0;
}, _addLinkedListItem = function _addLinkedListItem2(parent, child, firstProp, lastProp, sortBy) {
  if (firstProp === void 0) {
    firstProp = "_first";
  }
  if (lastProp === void 0) {
    lastProp = "_last";
  }
  var prev = parent[lastProp], t;
  if (sortBy) {
    t = child[sortBy];
    while (prev && prev[sortBy] > t) {
      prev = prev._prev;
    }
  }
  if (prev) {
    child._next = prev._next;
    prev._next = child;
  } else {
    child._next = parent[firstProp];
    parent[firstProp] = child;
  }
  if (child._next) {
    child._next._prev = child;
  } else {
    parent[lastProp] = child;
  }
  child._prev = prev;
  child.parent = child._dp = parent;
  return child;
}, _removeLinkedListItem = function _removeLinkedListItem2(parent, child, firstProp, lastProp) {
  if (firstProp === void 0) {
    firstProp = "_first";
  }
  if (lastProp === void 0) {
    lastProp = "_last";
  }
  var prev = child._prev, next = child._next;
  if (prev) {
    prev._next = next;
  } else if (parent[firstProp] === child) {
    parent[firstProp] = next;
  }
  if (next) {
    next._prev = prev;
  } else if (parent[lastProp] === child) {
    parent[lastProp] = prev;
  }
  child._next = child._prev = child.parent = null;
}, _removeFromParent = function _removeFromParent2(child, onlyIfParentHasAutoRemove) {
  child.parent && (!onlyIfParentHasAutoRemove || child.parent.autoRemoveChildren) && child.parent.remove(child);
  child._act = 0;
}, _uncache = function _uncache2(animation, child) {
  if (animation && (!child || child._end > animation._dur || child._start < 0)) {
    var a = animation;
    while (a) {
      a._dirty = 1;
      a = a.parent;
    }
  }
  return animation;
}, _recacheAncestors = function _recacheAncestors2(animation) {
  var parent = animation.parent;
  while (parent && parent.parent) {
    parent._dirty = 1;
    parent.totalDuration();
    parent = parent.parent;
  }
  return animation;
}, _hasNoPausedAncestors = function _hasNoPausedAncestors2(animation) {
  return !animation || animation._ts && _hasNoPausedAncestors2(animation.parent);
}, _elapsedCycleDuration = function _elapsedCycleDuration2(animation) {
  return animation._repeat ? _animationCycle(animation._tTime, animation = animation.duration() + animation._rDelay) * animation : 0;
}, _animationCycle = function _animationCycle2(tTime, cycleDuration) {
  var whole = Math.floor(tTime /= cycleDuration);
  return tTime && whole === tTime ? whole - 1 : whole;
}, _parentToChildTotalTime = function _parentToChildTotalTime2(parentTime, child) {
  return (parentTime - child._start) * child._ts + (child._ts >= 0 ? 0 : child._dirty ? child.totalDuration() : child._tDur);
}, _setEnd = function _setEnd2(animation) {
  return animation._end = _roundPrecise(animation._start + (animation._tDur / Math.abs(animation._ts || animation._rts || _tinyNum) || 0));
}, _alignPlayhead = function _alignPlayhead2(animation, totalTime) {
  var parent = animation._dp;
  if (parent && parent.smoothChildTiming && animation._ts) {
    animation._start = _roundPrecise(parent._time - (animation._ts > 0 ? totalTime / animation._ts : ((animation._dirty ? animation.totalDuration() : animation._tDur) - totalTime) / -animation._ts));
    _setEnd(animation);
    parent._dirty || _uncache(parent, animation);
  }
  return animation;
}, _postAddChecks = function _postAddChecks2(timeline2, child) {
  var t;
  if (child._time || child._initted && !child._dur) {
    t = _parentToChildTotalTime(timeline2.rawTime(), child);
    if (!child._dur || _clamp(0, child.totalDuration(), t) - child._tTime > _tinyNum) {
      child.render(t, true);
    }
  }
  if (_uncache(timeline2, child)._dp && timeline2._initted && timeline2._time >= timeline2._dur && timeline2._ts) {
    if (timeline2._dur < timeline2.duration()) {
      t = timeline2;
      while (t._dp) {
        t.rawTime() >= 0 && t.totalTime(t._tTime);
        t = t._dp;
      }
    }
    timeline2._zTime = -_tinyNum;
  }
}, _addToTimeline = function _addToTimeline2(timeline2, child, position, skipChecks) {
  child.parent && _removeFromParent(child);
  child._start = _roundPrecise((_isNumber(position) ? position : position || timeline2 !== _globalTimeline ? _parsePosition(timeline2, position, child) : timeline2._time) + child._delay);
  child._end = _roundPrecise(child._start + (child.totalDuration() / Math.abs(child.timeScale()) || 0));
  _addLinkedListItem(timeline2, child, "_first", "_last", timeline2._sort ? "_start" : 0);
  _isFromOrFromStart(child) || (timeline2._recent = child);
  skipChecks || _postAddChecks(timeline2, child);
  return timeline2;
}, _scrollTrigger = function _scrollTrigger2(animation, trigger) {
  return (_globals.ScrollTrigger || _missingPlugin("scrollTrigger", trigger)) && _globals.ScrollTrigger.create(trigger, animation);
}, _attemptInitTween = function _attemptInitTween2(tween, totalTime, force, suppressEvents) {
  _initTween(tween, totalTime);
  if (!tween._initted) {
    return 1;
  }
  if (!force && tween._pt && (tween._dur && tween.vars.lazy !== false || !tween._dur && tween.vars.lazy) && _lastRenderedFrame !== _ticker.frame) {
    _lazyTweens.push(tween);
    tween._lazy = [totalTime, suppressEvents];
    return 1;
  }
}, _parentPlayheadIsBeforeStart = function _parentPlayheadIsBeforeStart2(_ref) {
  var parent = _ref.parent;
  return parent && parent._ts && parent._initted && !parent._lock && (parent.rawTime() < 0 || _parentPlayheadIsBeforeStart2(parent));
}, _isFromOrFromStart = function _isFromOrFromStart2(_ref2) {
  var data = _ref2.data;
  return data === "isFromStart" || data === "isStart";
}, _renderZeroDurationTween = function _renderZeroDurationTween2(tween, totalTime, suppressEvents, force) {
  var prevRatio = tween.ratio, ratio = totalTime < 0 || !totalTime && (!tween._start && _parentPlayheadIsBeforeStart(tween) && !(!tween._initted && _isFromOrFromStart(tween)) || (tween._ts < 0 || tween._dp._ts < 0) && !_isFromOrFromStart(tween)) ? 0 : 1, repeatDelay = tween._rDelay, tTime = 0, pt, iteration, prevIteration;
  if (repeatDelay && tween._repeat) {
    tTime = _clamp(0, tween._tDur, totalTime);
    iteration = _animationCycle(tTime, repeatDelay);
    tween._yoyo && iteration & 1 && (ratio = 1 - ratio);
    if (iteration !== _animationCycle(tween._tTime, repeatDelay)) {
      prevRatio = 1 - ratio;
      tween.vars.repeatRefresh && tween._initted && tween.invalidate();
    }
  }
  if (ratio !== prevRatio || force || tween._zTime === _tinyNum || !totalTime && tween._zTime) {
    if (!tween._initted && _attemptInitTween(tween, totalTime, force, suppressEvents)) {
      return;
    }
    prevIteration = tween._zTime;
    tween._zTime = totalTime || (suppressEvents ? _tinyNum : 0);
    suppressEvents || (suppressEvents = totalTime && !prevIteration);
    tween.ratio = ratio;
    tween._from && (ratio = 1 - ratio);
    tween._time = 0;
    tween._tTime = tTime;
    pt = tween._pt;
    while (pt) {
      pt.r(ratio, pt.d);
      pt = pt._next;
    }
    tween._startAt && totalTime < 0 && tween._startAt.render(totalTime, true, true);
    tween._onUpdate && !suppressEvents && _callback(tween, "onUpdate");
    tTime && tween._repeat && !suppressEvents && tween.parent && _callback(tween, "onRepeat");
    if ((totalTime >= tween._tDur || totalTime < 0) && tween.ratio === ratio) {
      ratio && _removeFromParent(tween, 1);
      if (!suppressEvents) {
        _callback(tween, ratio ? "onComplete" : "onReverseComplete", true);
        tween._prom && tween._prom();
      }
    }
  } else if (!tween._zTime) {
    tween._zTime = totalTime;
  }
}, _findNextPauseTween = function _findNextPauseTween2(animation, prevTime, time) {
  var child;
  if (time > prevTime) {
    child = animation._first;
    while (child && child._start <= time) {
      if (child.data === "isPause" && child._start > prevTime) {
        return child;
      }
      child = child._next;
    }
  } else {
    child = animation._last;
    while (child && child._start >= time) {
      if (child.data === "isPause" && child._start < prevTime) {
        return child;
      }
      child = child._prev;
    }
  }
}, _setDuration = function _setDuration2(animation, duration, skipUncache, leavePlayhead) {
  var repeat = animation._repeat, dur = _roundPrecise(duration) || 0, totalProgress = animation._tTime / animation._tDur;
  totalProgress && !leavePlayhead && (animation._time *= dur / animation._dur);
  animation._dur = dur;
  animation._tDur = !repeat ? dur : repeat < 0 ? 1e10 : _roundPrecise(dur * (repeat + 1) + animation._rDelay * repeat);
  totalProgress > 0 && !leavePlayhead ? _alignPlayhead(animation, animation._tTime = animation._tDur * totalProgress) : animation.parent && _setEnd(animation);
  skipUncache || _uncache(animation.parent, animation);
  return animation;
}, _onUpdateTotalDuration = function _onUpdateTotalDuration2(animation) {
  return animation instanceof Timeline ? _uncache(animation) : _setDuration(animation, animation._dur);
}, _zeroPosition = {
  _start: 0,
  endTime: _emptyFunc,
  totalDuration: _emptyFunc
}, _parsePosition = function _parsePosition2(animation, position, percentAnimation) {
  var labels = animation.labels, recent = animation._recent || _zeroPosition, clippedDuration = animation.duration() >= _bigNum ? recent.endTime(false) : animation._dur, i, offset, isPercent;
  if (_isString(position) && (isNaN(position) || position in labels)) {
    offset = position.charAt(0);
    isPercent = position.substr(-1) === "%";
    i = position.indexOf("=");
    if (offset === "<" || offset === ">") {
      i >= 0 && (position = position.replace(/=/, ""));
      return (offset === "<" ? recent._start : recent.endTime(recent._repeat >= 0)) + (parseFloat(position.substr(1)) || 0) * (isPercent ? (i < 0 ? recent : percentAnimation).totalDuration() / 100 : 1);
    }
    if (i < 0) {
      position in labels || (labels[position] = clippedDuration);
      return labels[position];
    }
    offset = parseFloat(position.charAt(i - 1) + position.substr(i + 1));
    if (isPercent && percentAnimation) {
      offset = offset / 100 * (_isArray(percentAnimation) ? percentAnimation[0] : percentAnimation).totalDuration();
    }
    return i > 1 ? _parsePosition2(animation, position.substr(0, i - 1), percentAnimation) + offset : clippedDuration + offset;
  }
  return position == null ? clippedDuration : +position;
}, _createTweenType = function _createTweenType2(type, params, timeline2) {
  var isLegacy = _isNumber(params[1]), varsIndex = (isLegacy ? 2 : 1) + (type < 2 ? 0 : 1), vars = params[varsIndex], irVars, parent;
  isLegacy && (vars.duration = params[1]);
  vars.parent = timeline2;
  if (type) {
    irVars = vars;
    parent = timeline2;
    while (parent && !("immediateRender" in irVars)) {
      irVars = parent.vars.defaults || {};
      parent = _isNotFalse(parent.vars.inherit) && parent.parent;
    }
    vars.immediateRender = _isNotFalse(irVars.immediateRender);
    type < 2 ? vars.runBackwards = 1 : vars.startAt = params[varsIndex - 1];
  }
  return new Tween(params[0], vars, params[varsIndex + 1]);
}, _conditionalReturn = function _conditionalReturn2(value, func) {
  return value || value === 0 ? func(value) : func;
}, _clamp = function _clamp2(min, max, value) {
  return value < min ? min : value > max ? max : value;
}, getUnit = function getUnit2(value, v) {
  return !_isString(value) || !(v = _unitExp.exec(value)) ? "" : v[1];
}, clamp$1 = function clamp2(min, max, value) {
  return _conditionalReturn(value, function(v) {
    return _clamp(min, max, v);
  });
}, _slice = [].slice, _isArrayLike = function _isArrayLike2(value, nonEmpty) {
  return value && _isObject(value) && "length" in value && (!nonEmpty && !value.length || value.length - 1 in value && _isObject(value[0])) && !value.nodeType && value !== _win;
}, _flatten = function _flatten2(ar, leaveStrings, accumulator) {
  if (accumulator === void 0) {
    accumulator = [];
  }
  return ar.forEach(function(value) {
    var _accumulator;
    return _isString(value) && !leaveStrings || _isArrayLike(value, 1) ? (_accumulator = accumulator).push.apply(_accumulator, toArray(value)) : accumulator.push(value);
  }) || accumulator;
}, toArray = function toArray2(value, scope, leaveStrings) {
  return _isString(value) && !leaveStrings && (_coreInitted || !_wake()) ? _slice.call((scope || _doc).querySelectorAll(value), 0) : _isArray(value) ? _flatten(value, leaveStrings) : _isArrayLike(value) ? _slice.call(value, 0) : value ? [value] : [];
}, selector = function selector2(value) {
  value = toArray(value)[0] || _warn("Invalid scope") || {};
  return function(v) {
    var el = value.current || value.nativeElement || value;
    return toArray(v, el.querySelectorAll ? el : el === value ? _warn("Invalid scope") || _doc.createElement("div") : value);
  };
}, shuffle = function shuffle2(a) {
  return a.sort(function() {
    return 0.5 - Math.random();
  });
}, distribute = function distribute2(v) {
  if (_isFunction(v)) {
    return v;
  }
  var vars = _isObject(v) ? v : {
    each: v
  }, ease = _parseEase(vars.ease), from = vars.from || 0, base = parseFloat(vars.base) || 0, cache = {}, isDecimal = from > 0 && from < 1, ratios = isNaN(from) || isDecimal, axis = vars.axis, ratioX = from, ratioY = from;
  if (_isString(from)) {
    ratioX = ratioY = {
      center: 0.5,
      edges: 0.5,
      end: 1
    }[from] || 0;
  } else if (!isDecimal && ratios) {
    ratioX = from[0];
    ratioY = from[1];
  }
  return function(i, target, a) {
    var l = (a || vars).length, distances = cache[l], originX, originY, x, y, d, j, max, min, wrapAt;
    if (!distances) {
      wrapAt = vars.grid === "auto" ? 0 : (vars.grid || [1, _bigNum])[1];
      if (!wrapAt) {
        max = -_bigNum;
        while (max < (max = a[wrapAt++].getBoundingClientRect().left) && wrapAt < l) {
        }
        wrapAt--;
      }
      distances = cache[l] = [];
      originX = ratios ? Math.min(wrapAt, l) * ratioX - 0.5 : from % wrapAt;
      originY = wrapAt === _bigNum ? 0 : ratios ? l * ratioY / wrapAt - 0.5 : from / wrapAt | 0;
      max = 0;
      min = _bigNum;
      for (j = 0; j < l; j++) {
        x = j % wrapAt - originX;
        y = originY - (j / wrapAt | 0);
        distances[j] = d = !axis ? _sqrt(x * x + y * y) : Math.abs(axis === "y" ? y : x);
        d > max && (max = d);
        d < min && (min = d);
      }
      from === "random" && shuffle(distances);
      distances.max = max - min;
      distances.min = min;
      distances.v = l = (parseFloat(vars.amount) || parseFloat(vars.each) * (wrapAt > l ? l - 1 : !axis ? Math.max(wrapAt, l / wrapAt) : axis === "y" ? l / wrapAt : wrapAt) || 0) * (from === "edges" ? -1 : 1);
      distances.b = l < 0 ? base - l : base;
      distances.u = getUnit(vars.amount || vars.each) || 0;
      ease = ease && l < 0 ? _invertEase(ease) : ease;
    }
    l = (distances[i] - distances.min) / distances.max || 0;
    return _roundPrecise(distances.b + (ease ? ease(l) : l) * distances.v) + distances.u;
  };
}, _roundModifier = function _roundModifier2(v) {
  var p = Math.pow(10, ((v + "").split(".")[1] || "").length);
  return function(raw) {
    var n = Math.round(parseFloat(raw) / v) * v * p;
    return (n - n % 1) / p + (_isNumber(raw) ? 0 : getUnit(raw));
  };
}, snap = function snap2(snapTo, value) {
  var isArray = _isArray(snapTo), radius, is2D;
  if (!isArray && _isObject(snapTo)) {
    radius = isArray = snapTo.radius || _bigNum;
    if (snapTo.values) {
      snapTo = toArray(snapTo.values);
      if (is2D = !_isNumber(snapTo[0])) {
        radius *= radius;
      }
    } else {
      snapTo = _roundModifier(snapTo.increment);
    }
  }
  return _conditionalReturn(value, !isArray ? _roundModifier(snapTo) : _isFunction(snapTo) ? function(raw) {
    is2D = snapTo(raw);
    return Math.abs(is2D - raw) <= radius ? is2D : raw;
  } : function(raw) {
    var x = parseFloat(is2D ? raw.x : raw), y = parseFloat(is2D ? raw.y : 0), min = _bigNum, closest = 0, i = snapTo.length, dx, dy;
    while (i--) {
      if (is2D) {
        dx = snapTo[i].x - x;
        dy = snapTo[i].y - y;
        dx = dx * dx + dy * dy;
      } else {
        dx = Math.abs(snapTo[i] - x);
      }
      if (dx < min) {
        min = dx;
        closest = i;
      }
    }
    closest = !radius || min <= radius ? snapTo[closest] : raw;
    return is2D || closest === raw || _isNumber(raw) ? closest : closest + getUnit(raw);
  });
}, random = function random2(min, max, roundingIncrement, returnFunction) {
  return _conditionalReturn(_isArray(min) ? !max : roundingIncrement === true ? !!(roundingIncrement = 0) : !returnFunction, function() {
    return _isArray(min) ? min[~~(Math.random() * min.length)] : (roundingIncrement = roundingIncrement || 1e-5) && (returnFunction = roundingIncrement < 1 ? Math.pow(10, (roundingIncrement + "").length - 2) : 1) && Math.floor(Math.round((min - roundingIncrement / 2 + Math.random() * (max - min + roundingIncrement * 0.99)) / roundingIncrement) * roundingIncrement * returnFunction) / returnFunction;
  });
}, pipe = function pipe2() {
  for (var _len = arguments.length, functions = new Array(_len), _key = 0; _key < _len; _key++) {
    functions[_key] = arguments[_key];
  }
  return function(value) {
    return functions.reduce(function(v, f) {
      return f(v);
    }, value);
  };
}, unitize = function unitize2(func, unit) {
  return function(value) {
    return func(parseFloat(value)) + (unit || getUnit(value));
  };
}, normalize$3 = function normalize2(min, max, value) {
  return mapRange(min, max, 0, 1, value);
}, _wrapArray = function _wrapArray2(a, wrapper, value) {
  return _conditionalReturn(value, function(index) {
    return a[~~wrapper(index)];
  });
}, wrap = function wrap2(min, max, value) {
  var range = max - min;
  return _isArray(min) ? _wrapArray(min, wrap2(0, min.length), max) : _conditionalReturn(value, function(value2) {
    return (range + (value2 - min) % range) % range + min;
  });
}, wrapYoyo = function wrapYoyo2(min, max, value) {
  var range = max - min, total = range * 2;
  return _isArray(min) ? _wrapArray(min, wrapYoyo2(0, min.length - 1), max) : _conditionalReturn(value, function(value2) {
    value2 = (total + (value2 - min) % total) % total || 0;
    return min + (value2 > range ? total - value2 : value2);
  });
}, _replaceRandom = function _replaceRandom2(value) {
  var prev = 0, s = "", i, nums, end, isArray;
  while (~(i = value.indexOf("random(", prev))) {
    end = value.indexOf(")", i);
    isArray = value.charAt(i + 7) === "[";
    nums = value.substr(i + 7, end - i - 7).match(isArray ? _delimitedValueExp : _strictNumExp);
    s += value.substr(prev, i - prev) + random(isArray ? nums : +nums[0], isArray ? 0 : +nums[1], +nums[2] || 1e-5);
    prev = end + 1;
  }
  return s + value.substr(prev, value.length - prev);
}, mapRange = function mapRange2(inMin, inMax, outMin, outMax, value) {
  var inRange = inMax - inMin, outRange = outMax - outMin;
  return _conditionalReturn(value, function(value2) {
    return outMin + ((value2 - inMin) / inRange * outRange || 0);
  });
}, interpolate = function interpolate2(start, end, progress, mutate) {
  var func = isNaN(start + end) ? 0 : function(p2) {
    return (1 - p2) * start + p2 * end;
  };
  if (!func) {
    var isString = _isString(start), master = {}, p, i, interpolators, l, il;
    progress === true && (mutate = 1) && (progress = null);
    if (isString) {
      start = {
        p: start
      };
      end = {
        p: end
      };
    } else if (_isArray(start) && !_isArray(end)) {
      interpolators = [];
      l = start.length;
      il = l - 2;
      for (i = 1; i < l; i++) {
        interpolators.push(interpolate2(start[i - 1], start[i]));
      }
      l--;
      func = function func2(p2) {
        p2 *= l;
        var i2 = Math.min(il, ~~p2);
        return interpolators[i2](p2 - i2);
      };
      progress = end;
    } else if (!mutate) {
      start = _merge(_isArray(start) ? [] : {}, start);
    }
    if (!interpolators) {
      for (p in end) {
        _addPropTween.call(master, start, p, "get", end[p]);
      }
      func = function func2(p2) {
        return _renderPropTweens(p2, master) || (isString ? start.p : start);
      };
    }
  }
  return _conditionalReturn(progress, func);
}, _getLabelInDirection = function _getLabelInDirection2(timeline2, fromTime, backward) {
  var labels = timeline2.labels, min = _bigNum, p, distance, label;
  for (p in labels) {
    distance = labels[p] - fromTime;
    if (distance < 0 === !!backward && distance && min > (distance = Math.abs(distance))) {
      label = p;
      min = distance;
    }
  }
  return label;
}, _callback = function _callback2(animation, type, executeLazyFirst) {
  var v = animation.vars, callback = v[type], params, scope;
  if (!callback) {
    return;
  }
  params = v[type + "Params"];
  scope = v.callbackScope || animation;
  executeLazyFirst && _lazyTweens.length && _lazyRender();
  return params ? callback.apply(scope, params) : callback.call(scope);
}, _interrupt = function _interrupt2(animation) {
  _removeFromParent(animation);
  animation.scrollTrigger && animation.scrollTrigger.kill(false);
  animation.progress() < 1 && _callback(animation, "onInterrupt");
  return animation;
}, _quickTween, _createPlugin = function _createPlugin2(config3) {
  config3 = !config3.name && config3["default"] || config3;
  var name = config3.name, isFunc = _isFunction(config3), Plugin = name && !isFunc && config3.init ? function() {
    this._props = [];
  } : config3, instanceDefaults = {
    init: _emptyFunc,
    render: _renderPropTweens,
    add: _addPropTween,
    kill: _killPropTweensOf,
    modifier: _addPluginModifier,
    rawVars: 0
  }, statics = {
    targetTest: 0,
    get: 0,
    getSetter: _getSetter,
    aliases: {},
    register: 0
  };
  _wake();
  if (config3 !== Plugin) {
    if (_plugins[name]) {
      return;
    }
    _setDefaults(Plugin, _setDefaults(_copyExcluding(config3, instanceDefaults), statics));
    _merge(Plugin.prototype, _merge(instanceDefaults, _copyExcluding(config3, statics)));
    _plugins[Plugin.prop = name] = Plugin;
    if (config3.targetTest) {
      _harnessPlugins.push(Plugin);
      _reservedProps[name] = 1;
    }
    name = (name === "css" ? "CSS" : name.charAt(0).toUpperCase() + name.substr(1)) + "Plugin";
  }
  _addGlobal(name, Plugin);
  config3.register && config3.register(gsap, Plugin, PropTween);
}, _255 = 255, _colorLookup = {
  aqua: [0, _255, _255],
  lime: [0, _255, 0],
  silver: [192, 192, 192],
  black: [0, 0, 0],
  maroon: [128, 0, 0],
  teal: [0, 128, 128],
  blue: [0, 0, _255],
  navy: [0, 0, 128],
  white: [_255, _255, _255],
  olive: [128, 128, 0],
  yellow: [_255, _255, 0],
  orange: [_255, 165, 0],
  gray: [128, 128, 128],
  purple: [128, 0, 128],
  green: [0, 128, 0],
  red: [_255, 0, 0],
  pink: [_255, 192, 203],
  cyan: [0, _255, _255],
  transparent: [_255, _255, _255, 0]
}, _hue = function _hue2(h, m1, m2) {
  h += h < 0 ? 1 : h > 1 ? -1 : 0;
  return (h * 6 < 1 ? m1 + (m2 - m1) * h * 6 : h < 0.5 ? m2 : h * 3 < 2 ? m1 + (m2 - m1) * (2 / 3 - h) * 6 : m1) * _255 + 0.5 | 0;
}, splitColor = function splitColor2(v, toHSL, forceAlpha) {
  var a = !v ? _colorLookup.black : _isNumber(v) ? [v >> 16, v >> 8 & _255, v & _255] : 0, r, g, b, h, s, l, max, min, d, wasHSL;
  if (!a) {
    if (v.substr(-1) === ",") {
      v = v.substr(0, v.length - 1);
    }
    if (_colorLookup[v]) {
      a = _colorLookup[v];
    } else if (v.charAt(0) === "#") {
      if (v.length < 6) {
        r = v.charAt(1);
        g = v.charAt(2);
        b = v.charAt(3);
        v = "#" + r + r + g + g + b + b + (v.length === 5 ? v.charAt(4) + v.charAt(4) : "");
      }
      if (v.length === 9) {
        a = parseInt(v.substr(1, 6), 16);
        return [a >> 16, a >> 8 & _255, a & _255, parseInt(v.substr(7), 16) / 255];
      }
      v = parseInt(v.substr(1), 16);
      a = [v >> 16, v >> 8 & _255, v & _255];
    } else if (v.substr(0, 3) === "hsl") {
      a = wasHSL = v.match(_strictNumExp);
      if (!toHSL) {
        h = +a[0] % 360 / 360;
        s = +a[1] / 100;
        l = +a[2] / 100;
        g = l <= 0.5 ? l * (s + 1) : l + s - l * s;
        r = l * 2 - g;
        a.length > 3 && (a[3] *= 1);
        a[0] = _hue(h + 1 / 3, r, g);
        a[1] = _hue(h, r, g);
        a[2] = _hue(h - 1 / 3, r, g);
      } else if (~v.indexOf("=")) {
        a = v.match(_numExp);
        forceAlpha && a.length < 4 && (a[3] = 1);
        return a;
      }
    } else {
      a = v.match(_strictNumExp) || _colorLookup.transparent;
    }
    a = a.map(Number);
  }
  if (toHSL && !wasHSL) {
    r = a[0] / _255;
    g = a[1] / _255;
    b = a[2] / _255;
    max = Math.max(r, g, b);
    min = Math.min(r, g, b);
    l = (max + min) / 2;
    if (max === min) {
      h = s = 0;
    } else {
      d = max - min;
      s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
      h = max === r ? (g - b) / d + (g < b ? 6 : 0) : max === g ? (b - r) / d + 2 : (r - g) / d + 4;
      h *= 60;
    }
    a[0] = ~~(h + 0.5);
    a[1] = ~~(s * 100 + 0.5);
    a[2] = ~~(l * 100 + 0.5);
  }
  forceAlpha && a.length < 4 && (a[3] = 1);
  return a;
}, _colorOrderData = function _colorOrderData2(v) {
  var values = [], c = [], i = -1;
  v.split(_colorExp).forEach(function(v2) {
    var a = v2.match(_numWithUnitExp) || [];
    values.push.apply(values, a);
    c.push(i += a.length + 1);
  });
  values.c = c;
  return values;
}, _formatColors = function _formatColors2(s, toHSL, orderMatchData) {
  var result = "", colors = (s + result).match(_colorExp), type = toHSL ? "hsla(" : "rgba(", i = 0, c, shell, d, l;
  if (!colors) {
    return s;
  }
  colors = colors.map(function(color) {
    return (color = splitColor(color, toHSL, 1)) && type + (toHSL ? color[0] + "," + color[1] + "%," + color[2] + "%," + color[3] : color.join(",")) + ")";
  });
  if (orderMatchData) {
    d = _colorOrderData(s);
    c = orderMatchData.c;
    if (c.join(result) !== d.c.join(result)) {
      shell = s.replace(_colorExp, "1").split(_numWithUnitExp);
      l = shell.length - 1;
      for (; i < l; i++) {
        result += shell[i] + (~c.indexOf(i) ? colors.shift() || type + "0,0,0,0)" : (d.length ? d : colors.length ? colors : orderMatchData).shift());
      }
    }
  }
  if (!shell) {
    shell = s.split(_colorExp);
    l = shell.length - 1;
    for (; i < l; i++) {
      result += shell[i] + colors[i];
    }
  }
  return result + shell[l];
}, _colorExp = function() {
  var s = "(?:\\b(?:(?:rgb|rgba|hsl|hsla)\\(.+?\\))|\\B#(?:[0-9a-f]{3,4}){1,2}\\b", p;
  for (p in _colorLookup) {
    s += "|" + p + "\\b";
  }
  return new RegExp(s + ")", "gi");
}(), _hslExp = /hsl[a]?\(/, _colorStringFilter = function _colorStringFilter2(a) {
  var combined = a.join(" "), toHSL;
  _colorExp.lastIndex = 0;
  if (_colorExp.test(combined)) {
    toHSL = _hslExp.test(combined);
    a[1] = _formatColors(a[1], toHSL);
    a[0] = _formatColors(a[0], toHSL, _colorOrderData(a[1]));
    return true;
  }
}, _tickerActive, _ticker = function() {
  var _getTime = Date.now, _lagThreshold = 500, _adjustedLag = 33, _startTime = _getTime(), _lastUpdate = _startTime, _gap = 1e3 / 240, _nextTime = _gap, _listeners = [], _id, _req, _raf, _self, _delta, _i, _tick = function _tick2(v) {
    var elapsed = _getTime() - _lastUpdate, manual = v === true, overlap, dispatch, time, frame;
    elapsed > _lagThreshold && (_startTime += elapsed - _adjustedLag);
    _lastUpdate += elapsed;
    time = _lastUpdate - _startTime;
    overlap = time - _nextTime;
    if (overlap > 0 || manual) {
      frame = ++_self.frame;
      _delta = time - _self.time * 1e3;
      _self.time = time = time / 1e3;
      _nextTime += overlap + (overlap >= _gap ? 4 : _gap - overlap);
      dispatch = 1;
    }
    manual || (_id = _req(_tick2));
    if (dispatch) {
      for (_i = 0; _i < _listeners.length; _i++) {
        _listeners[_i](time, _delta, frame, v);
      }
    }
  };
  _self = {
    time: 0,
    frame: 0,
    tick: function tick() {
      _tick(true);
    },
    deltaRatio: function deltaRatio(fps) {
      return _delta / (1e3 / (fps || 60));
    },
    wake: function wake() {
      if (_coreReady) {
        if (!_coreInitted && _windowExists()) {
          _win = _coreInitted = window;
          _doc = _win.document || {};
          _globals.gsap = gsap;
          (_win.gsapVersions || (_win.gsapVersions = [])).push(gsap.version);
          _install(_installScope || _win.GreenSockGlobals || !_win.gsap && _win || {});
          _raf = _win.requestAnimationFrame;
        }
        _id && _self.sleep();
        _req = _raf || function(f) {
          return setTimeout(f, _nextTime - _self.time * 1e3 + 1 | 0);
        };
        _tickerActive = 1;
        _tick(2);
      }
    },
    sleep: function sleep() {
      (_raf ? _win.cancelAnimationFrame : clearTimeout)(_id);
      _tickerActive = 0;
      _req = _emptyFunc;
    },
    lagSmoothing: function lagSmoothing(threshold, adjustedLag) {
      _lagThreshold = threshold || 1 / _tinyNum;
      _adjustedLag = Math.min(adjustedLag, _lagThreshold, 0);
    },
    fps: function fps(_fps) {
      _gap = 1e3 / (_fps || 240);
      _nextTime = _self.time * 1e3 + _gap;
    },
    add: function add(callback, once, prioritize) {
      var func = once ? function(t, d, f, v) {
        callback(t, d, f, v);
        _self.remove(func);
      } : callback;
      _self.remove(callback);
      _listeners[prioritize ? "unshift" : "push"](func);
      _wake();
      return func;
    },
    remove: function remove(callback, i) {
      ~(i = _listeners.indexOf(callback)) && _listeners.splice(i, 1) && _i >= i && _i--;
    },
    _listeners
  };
  return _self;
}(), _wake = function _wake2() {
  return !_tickerActive && _ticker.wake();
}, _easeMap = {}, _customEaseExp = /^[\d.\-M][\d.\-,\s]/, _quotesExp = /["']/g, _parseObjectInString = function _parseObjectInString2(value) {
  var obj = {}, split = value.substr(1, value.length - 3).split(":"), key = split[0], i = 1, l = split.length, index, val, parsedVal;
  for (; i < l; i++) {
    val = split[i];
    index = i !== l - 1 ? val.lastIndexOf(",") : val.length;
    parsedVal = val.substr(0, index);
    obj[key] = isNaN(parsedVal) ? parsedVal.replace(_quotesExp, "").trim() : +parsedVal;
    key = val.substr(index + 1).trim();
  }
  return obj;
}, _valueInParentheses = function _valueInParentheses2(value) {
  var open = value.indexOf("(") + 1, close = value.indexOf(")"), nested = value.indexOf("(", open);
  return value.substring(open, ~nested && nested < close ? value.indexOf(")", close + 1) : close);
}, _configEaseFromString = function _configEaseFromString2(name) {
  var split = (name + "").split("("), ease = _easeMap[split[0]];
  return ease && split.length > 1 && ease.config ? ease.config.apply(null, ~name.indexOf("{") ? [_parseObjectInString(split[1])] : _valueInParentheses(name).split(",").map(_numericIfPossible)) : _easeMap._CE && _customEaseExp.test(name) ? _easeMap._CE("", name) : ease;
}, _invertEase = function _invertEase2(ease) {
  return function(p) {
    return 1 - ease(1 - p);
  };
}, _propagateYoyoEase = function _propagateYoyoEase2(timeline2, isYoyo) {
  var child = timeline2._first, ease;
  while (child) {
    if (child instanceof Timeline) {
      _propagateYoyoEase2(child, isYoyo);
    } else if (child.vars.yoyoEase && (!child._yoyo || !child._repeat) && child._yoyo !== isYoyo) {
      if (child.timeline) {
        _propagateYoyoEase2(child.timeline, isYoyo);
      } else {
        ease = child._ease;
        child._ease = child._yEase;
        child._yEase = ease;
        child._yoyo = isYoyo;
      }
    }
    child = child._next;
  }
}, _parseEase = function _parseEase2(ease, defaultEase) {
  return !ease ? defaultEase : (_isFunction(ease) ? ease : _easeMap[ease] || _configEaseFromString(ease)) || defaultEase;
}, _insertEase = function _insertEase2(names, easeIn, easeOut, easeInOut) {
  if (easeOut === void 0) {
    easeOut = function easeOut2(p) {
      return 1 - easeIn(1 - p);
    };
  }
  if (easeInOut === void 0) {
    easeInOut = function easeInOut2(p) {
      return p < 0.5 ? easeIn(p * 2) / 2 : 1 - easeIn((1 - p) * 2) / 2;
    };
  }
  var ease = {
    easeIn,
    easeOut,
    easeInOut
  }, lowercaseName;
  _forEachName(names, function(name) {
    _easeMap[name] = _globals[name] = ease;
    _easeMap[lowercaseName = name.toLowerCase()] = easeOut;
    for (var p in ease) {
      _easeMap[lowercaseName + (p === "easeIn" ? ".in" : p === "easeOut" ? ".out" : ".inOut")] = _easeMap[name + "." + p] = ease[p];
    }
  });
  return ease;
}, _easeInOutFromOut = function _easeInOutFromOut2(easeOut) {
  return function(p) {
    return p < 0.5 ? (1 - easeOut(1 - p * 2)) / 2 : 0.5 + easeOut((p - 0.5) * 2) / 2;
  };
}, _configElastic = function _configElastic2(type, amplitude, period) {
  var p1 = amplitude >= 1 ? amplitude : 1, p2 = (period || (type ? 0.3 : 0.45)) / (amplitude < 1 ? amplitude : 1), p3 = p2 / _2PI * (Math.asin(1 / p1) || 0), easeOut = function easeOut2(p) {
    return p === 1 ? 1 : p1 * Math.pow(2, -10 * p) * _sin((p - p3) * p2) + 1;
  }, ease = type === "out" ? easeOut : type === "in" ? function(p) {
    return 1 - easeOut(1 - p);
  } : _easeInOutFromOut(easeOut);
  p2 = _2PI / p2;
  ease.config = function(amplitude2, period2) {
    return _configElastic2(type, amplitude2, period2);
  };
  return ease;
}, _configBack = function _configBack2(type, overshoot) {
  if (overshoot === void 0) {
    overshoot = 1.70158;
  }
  var easeOut = function easeOut2(p) {
    return p ? --p * p * ((overshoot + 1) * p + overshoot) + 1 : 0;
  }, ease = type === "out" ? easeOut : type === "in" ? function(p) {
    return 1 - easeOut(1 - p);
  } : _easeInOutFromOut(easeOut);
  ease.config = function(overshoot2) {
    return _configBack2(type, overshoot2);
  };
  return ease;
};
_forEachName("Linear,Quad,Cubic,Quart,Quint,Strong", function(name, i) {
  var power = i < 5 ? i + 1 : i;
  _insertEase(name + ",Power" + (power - 1), i ? function(p) {
    return Math.pow(p, power);
  } : function(p) {
    return p;
  }, function(p) {
    return 1 - Math.pow(1 - p, power);
  }, function(p) {
    return p < 0.5 ? Math.pow(p * 2, power) / 2 : 1 - Math.pow((1 - p) * 2, power) / 2;
  });
});
_easeMap.Linear.easeNone = _easeMap.none = _easeMap.Linear.easeIn;
_insertEase("Elastic", _configElastic("in"), _configElastic("out"), _configElastic());
(function(n, c) {
  var n1 = 1 / c, n2 = 2 * n1, n3 = 2.5 * n1, easeOut = function easeOut2(p) {
    return p < n1 ? n * p * p : p < n2 ? n * Math.pow(p - 1.5 / c, 2) + 0.75 : p < n3 ? n * (p -= 2.25 / c) * p + 0.9375 : n * Math.pow(p - 2.625 / c, 2) + 0.984375;
  };
  _insertEase("Bounce", function(p) {
    return 1 - easeOut(1 - p);
  }, easeOut);
})(7.5625, 2.75);
_insertEase("Expo", function(p) {
  return p ? Math.pow(2, 10 * (p - 1)) : 0;
});
_insertEase("Circ", function(p) {
  return -(_sqrt(1 - p * p) - 1);
});
_insertEase("Sine", function(p) {
  return p === 1 ? 1 : -_cos(p * _HALF_PI) + 1;
});
_insertEase("Back", _configBack("in"), _configBack("out"), _configBack());
_easeMap.SteppedEase = _easeMap.steps = _globals.SteppedEase = {
  config: function config(steps, immediateStart) {
    if (steps === void 0) {
      steps = 1;
    }
    var p1 = 1 / steps, p2 = steps + (immediateStart ? 0 : 1), p3 = immediateStart ? 1 : 0, max = 1 - _tinyNum;
    return function(p) {
      return ((p2 * _clamp(0, max, p) | 0) + p3) * p1;
    };
  }
};
_defaults.ease = _easeMap["quad.out"];
_forEachName("onComplete,onUpdate,onStart,onRepeat,onReverseComplete,onInterrupt", function(name) {
  return _callbackNames += name + "," + name + "Params,";
});
var GSCache = function GSCache2(target, harness) {
  this.id = _gsID++;
  target._gsap = this;
  this.target = target;
  this.harness = harness;
  this.get = harness ? harness.get : _getProperty;
  this.set = harness ? harness.getSetter : _getSetter;
};
var Animation = /* @__PURE__ */ function() {
  function Animation2(vars) {
    this.vars = vars;
    this._delay = +vars.delay || 0;
    if (this._repeat = vars.repeat === Infinity ? -2 : vars.repeat || 0) {
      this._rDelay = vars.repeatDelay || 0;
      this._yoyo = !!vars.yoyo || !!vars.yoyoEase;
    }
    this._ts = 1;
    _setDuration(this, +vars.duration, 1, 1);
    this.data = vars.data;
    _tickerActive || _ticker.wake();
  }
  var _proto = Animation2.prototype;
  _proto.delay = function delay(value) {
    if (value || value === 0) {
      this.parent && this.parent.smoothChildTiming && this.startTime(this._start + value - this._delay);
      this._delay = value;
      return this;
    }
    return this._delay;
  };
  _proto.duration = function duration(value) {
    return arguments.length ? this.totalDuration(this._repeat > 0 ? value + (value + this._rDelay) * this._repeat : value) : this.totalDuration() && this._dur;
  };
  _proto.totalDuration = function totalDuration(value) {
    if (!arguments.length) {
      return this._tDur;
    }
    this._dirty = 0;
    return _setDuration(this, this._repeat < 0 ? value : (value - this._repeat * this._rDelay) / (this._repeat + 1));
  };
  _proto.totalTime = function totalTime(_totalTime, suppressEvents) {
    _wake();
    if (!arguments.length) {
      return this._tTime;
    }
    var parent = this._dp;
    if (parent && parent.smoothChildTiming && this._ts) {
      _alignPlayhead(this, _totalTime);
      !parent._dp || parent.parent || _postAddChecks(parent, this);
      while (parent && parent.parent) {
        if (parent.parent._time !== parent._start + (parent._ts >= 0 ? parent._tTime / parent._ts : (parent.totalDuration() - parent._tTime) / -parent._ts)) {
          parent.totalTime(parent._tTime, true);
        }
        parent = parent.parent;
      }
      if (!this.parent && this._dp.autoRemoveChildren && (this._ts > 0 && _totalTime < this._tDur || this._ts < 0 && _totalTime > 0 || !this._tDur && !_totalTime)) {
        _addToTimeline(this._dp, this, this._start - this._delay);
      }
    }
    if (this._tTime !== _totalTime || !this._dur && !suppressEvents || this._initted && Math.abs(this._zTime) === _tinyNum || !_totalTime && !this._initted && (this.add || this._ptLookup)) {
      this._ts || (this._pTime = _totalTime);
      _lazySafeRender(this, _totalTime, suppressEvents);
    }
    return this;
  };
  _proto.time = function time(value, suppressEvents) {
    return arguments.length ? this.totalTime(Math.min(this.totalDuration(), value + _elapsedCycleDuration(this)) % (this._dur + this._rDelay) || (value ? this._dur : 0), suppressEvents) : this._time;
  };
  _proto.totalProgress = function totalProgress(value, suppressEvents) {
    return arguments.length ? this.totalTime(this.totalDuration() * value, suppressEvents) : this.totalDuration() ? Math.min(1, this._tTime / this._tDur) : this.ratio;
  };
  _proto.progress = function progress(value, suppressEvents) {
    return arguments.length ? this.totalTime(this.duration() * (this._yoyo && !(this.iteration() & 1) ? 1 - value : value) + _elapsedCycleDuration(this), suppressEvents) : this.duration() ? Math.min(1, this._time / this._dur) : this.ratio;
  };
  _proto.iteration = function iteration(value, suppressEvents) {
    var cycleDuration = this.duration() + this._rDelay;
    return arguments.length ? this.totalTime(this._time + (value - 1) * cycleDuration, suppressEvents) : this._repeat ? _animationCycle(this._tTime, cycleDuration) + 1 : 1;
  };
  _proto.timeScale = function timeScale(value) {
    if (!arguments.length) {
      return this._rts === -_tinyNum ? 0 : this._rts;
    }
    if (this._rts === value) {
      return this;
    }
    var tTime = this.parent && this._ts ? _parentToChildTotalTime(this.parent._time, this) : this._tTime;
    this._rts = +value || 0;
    this._ts = this._ps || value === -_tinyNum ? 0 : this._rts;
    this.totalTime(_clamp(-this._delay, this._tDur, tTime), true);
    _setEnd(this);
    return _recacheAncestors(this);
  };
  _proto.paused = function paused(value) {
    if (!arguments.length) {
      return this._ps;
    }
    if (this._ps !== value) {
      this._ps = value;
      if (value) {
        this._pTime = this._tTime || Math.max(-this._delay, this.rawTime());
        this._ts = this._act = 0;
      } else {
        _wake();
        this._ts = this._rts;
        this.totalTime(this.parent && !this.parent.smoothChildTiming ? this.rawTime() : this._tTime || this._pTime, this.progress() === 1 && Math.abs(this._zTime) !== _tinyNum && (this._tTime -= _tinyNum));
      }
    }
    return this;
  };
  _proto.startTime = function startTime(value) {
    if (arguments.length) {
      this._start = value;
      var parent = this.parent || this._dp;
      parent && (parent._sort || !this.parent) && _addToTimeline(parent, this, value - this._delay);
      return this;
    }
    return this._start;
  };
  _proto.endTime = function endTime(includeRepeats) {
    return this._start + (_isNotFalse(includeRepeats) ? this.totalDuration() : this.duration()) / Math.abs(this._ts || 1);
  };
  _proto.rawTime = function rawTime(wrapRepeats) {
    var parent = this.parent || this._dp;
    return !parent ? this._tTime : wrapRepeats && (!this._ts || this._repeat && this._time && this.totalProgress() < 1) ? this._tTime % (this._dur + this._rDelay) : !this._ts ? this._tTime : _parentToChildTotalTime(parent.rawTime(wrapRepeats), this);
  };
  _proto.globalTime = function globalTime(rawTime) {
    var animation = this, time = arguments.length ? rawTime : animation.rawTime();
    while (animation) {
      time = animation._start + time / (animation._ts || 1);
      animation = animation._dp;
    }
    return time;
  };
  _proto.repeat = function repeat(value) {
    if (arguments.length) {
      this._repeat = value === Infinity ? -2 : value;
      return _onUpdateTotalDuration(this);
    }
    return this._repeat === -2 ? Infinity : this._repeat;
  };
  _proto.repeatDelay = function repeatDelay(value) {
    if (arguments.length) {
      var time = this._time;
      this._rDelay = value;
      _onUpdateTotalDuration(this);
      return time ? this.time(time) : this;
    }
    return this._rDelay;
  };
  _proto.yoyo = function yoyo(value) {
    if (arguments.length) {
      this._yoyo = value;
      return this;
    }
    return this._yoyo;
  };
  _proto.seek = function seek(position, suppressEvents) {
    return this.totalTime(_parsePosition(this, position), _isNotFalse(suppressEvents));
  };
  _proto.restart = function restart(includeDelay, suppressEvents) {
    return this.play().totalTime(includeDelay ? -this._delay : 0, _isNotFalse(suppressEvents));
  };
  _proto.play = function play(from, suppressEvents) {
    from != null && this.seek(from, suppressEvents);
    return this.reversed(false).paused(false);
  };
  _proto.reverse = function reverse(from, suppressEvents) {
    from != null && this.seek(from || this.totalDuration(), suppressEvents);
    return this.reversed(true).paused(false);
  };
  _proto.pause = function pause(atTime, suppressEvents) {
    atTime != null && this.seek(atTime, suppressEvents);
    return this.paused(true);
  };
  _proto.resume = function resume() {
    return this.paused(false);
  };
  _proto.reversed = function reversed(value) {
    if (arguments.length) {
      !!value !== this.reversed() && this.timeScale(-this._rts || (value ? -_tinyNum : 0));
      return this;
    }
    return this._rts < 0;
  };
  _proto.invalidate = function invalidate() {
    this._initted = this._act = 0;
    this._zTime = -_tinyNum;
    return this;
  };
  _proto.isActive = function isActive() {
    var parent = this.parent || this._dp, start = this._start, rawTime;
    return !!(!parent || this._ts && this._initted && parent.isActive() && (rawTime = parent.rawTime(true)) >= start && rawTime < this.endTime(true) - _tinyNum);
  };
  _proto.eventCallback = function eventCallback(type, callback, params) {
    var vars = this.vars;
    if (arguments.length > 1) {
      if (!callback) {
        delete vars[type];
      } else {
        vars[type] = callback;
        params && (vars[type + "Params"] = params);
        type === "onUpdate" && (this._onUpdate = callback);
      }
      return this;
    }
    return vars[type];
  };
  _proto.then = function then(onFulfilled) {
    var self = this;
    return new Promise(function(resolve) {
      var f = _isFunction(onFulfilled) ? onFulfilled : _passThrough, _resolve = function _resolve2() {
        var _then = self.then;
        self.then = null;
        _isFunction(f) && (f = f(self)) && (f.then || f === self) && (self.then = _then);
        resolve(f);
        self.then = _then;
      };
      if (self._initted && self.totalProgress() === 1 && self._ts >= 0 || !self._tTime && self._ts < 0) {
        _resolve();
      } else {
        self._prom = _resolve;
      }
    });
  };
  _proto.kill = function kill() {
    _interrupt(this);
  };
  return Animation2;
}();
_setDefaults(Animation.prototype, {
  _time: 0,
  _start: 0,
  _end: 0,
  _tTime: 0,
  _tDur: 0,
  _dirty: 0,
  _repeat: 0,
  _yoyo: false,
  parent: null,
  _initted: false,
  _rDelay: 0,
  _ts: 1,
  _dp: 0,
  ratio: 0,
  _zTime: -_tinyNum,
  _prom: 0,
  _ps: false,
  _rts: 1
});
var Timeline = /* @__PURE__ */ function(_Animation) {
  _inheritsLoose(Timeline2, _Animation);
  function Timeline2(vars, position) {
    var _this;
    if (vars === void 0) {
      vars = {};
    }
    _this = _Animation.call(this, vars) || this;
    _this.labels = {};
    _this.smoothChildTiming = !!vars.smoothChildTiming;
    _this.autoRemoveChildren = !!vars.autoRemoveChildren;
    _this._sort = _isNotFalse(vars.sortChildren);
    _globalTimeline && _addToTimeline(vars.parent || _globalTimeline, _assertThisInitialized(_this), position);
    vars.reversed && _this.reverse();
    vars.paused && _this.paused(true);
    vars.scrollTrigger && _scrollTrigger(_assertThisInitialized(_this), vars.scrollTrigger);
    return _this;
  }
  var _proto2 = Timeline2.prototype;
  _proto2.to = function to(targets, vars, position) {
    _createTweenType(0, arguments, this);
    return this;
  };
  _proto2.from = function from(targets, vars, position) {
    _createTweenType(1, arguments, this);
    return this;
  };
  _proto2.fromTo = function fromTo(targets, fromVars, toVars, position) {
    _createTweenType(2, arguments, this);
    return this;
  };
  _proto2.set = function set(targets, vars, position) {
    vars.duration = 0;
    vars.parent = this;
    _inheritDefaults(vars).repeatDelay || (vars.repeat = 0);
    vars.immediateRender = !!vars.immediateRender;
    new Tween(targets, vars, _parsePosition(this, position), 1);
    return this;
  };
  _proto2.call = function call(callback, params, position) {
    return _addToTimeline(this, Tween.delayedCall(0, callback, params), position);
  };
  _proto2.staggerTo = function staggerTo(targets, duration, vars, stagger, position, onCompleteAll, onCompleteAllParams) {
    vars.duration = duration;
    vars.stagger = vars.stagger || stagger;
    vars.onComplete = onCompleteAll;
    vars.onCompleteParams = onCompleteAllParams;
    vars.parent = this;
    new Tween(targets, vars, _parsePosition(this, position));
    return this;
  };
  _proto2.staggerFrom = function staggerFrom(targets, duration, vars, stagger, position, onCompleteAll, onCompleteAllParams) {
    vars.runBackwards = 1;
    _inheritDefaults(vars).immediateRender = _isNotFalse(vars.immediateRender);
    return this.staggerTo(targets, duration, vars, stagger, position, onCompleteAll, onCompleteAllParams);
  };
  _proto2.staggerFromTo = function staggerFromTo(targets, duration, fromVars, toVars, stagger, position, onCompleteAll, onCompleteAllParams) {
    toVars.startAt = fromVars;
    _inheritDefaults(toVars).immediateRender = _isNotFalse(toVars.immediateRender);
    return this.staggerTo(targets, duration, toVars, stagger, position, onCompleteAll, onCompleteAllParams);
  };
  _proto2.render = function render(totalTime, suppressEvents, force) {
    var prevTime = this._time, tDur = this._dirty ? this.totalDuration() : this._tDur, dur = this._dur, tTime = totalTime <= 0 ? 0 : _roundPrecise(totalTime), crossingStart = this._zTime < 0 !== totalTime < 0 && (this._initted || !dur), time, child, next, iteration, cycleDuration, prevPaused, pauseTween, timeScale, prevStart, prevIteration, yoyo, isYoyo;
    this !== _globalTimeline && tTime > tDur && totalTime >= 0 && (tTime = tDur);
    if (tTime !== this._tTime || force || crossingStart) {
      if (prevTime !== this._time && dur) {
        tTime += this._time - prevTime;
        totalTime += this._time - prevTime;
      }
      time = tTime;
      prevStart = this._start;
      timeScale = this._ts;
      prevPaused = !timeScale;
      if (crossingStart) {
        dur || (prevTime = this._zTime);
        (totalTime || !suppressEvents) && (this._zTime = totalTime);
      }
      if (this._repeat) {
        yoyo = this._yoyo;
        cycleDuration = dur + this._rDelay;
        if (this._repeat < -1 && totalTime < 0) {
          return this.totalTime(cycleDuration * 100 + totalTime, suppressEvents, force);
        }
        time = _roundPrecise(tTime % cycleDuration);
        if (tTime === tDur) {
          iteration = this._repeat;
          time = dur;
        } else {
          iteration = ~~(tTime / cycleDuration);
          if (iteration && iteration === tTime / cycleDuration) {
            time = dur;
            iteration--;
          }
          time > dur && (time = dur);
        }
        prevIteration = _animationCycle(this._tTime, cycleDuration);
        !prevTime && this._tTime && prevIteration !== iteration && (prevIteration = iteration);
        if (yoyo && iteration & 1) {
          time = dur - time;
          isYoyo = 1;
        }
        if (iteration !== prevIteration && !this._lock) {
          var rewinding = yoyo && prevIteration & 1, doesWrap = rewinding === (yoyo && iteration & 1);
          iteration < prevIteration && (rewinding = !rewinding);
          prevTime = rewinding ? 0 : dur;
          this._lock = 1;
          this.render(prevTime || (isYoyo ? 0 : _roundPrecise(iteration * cycleDuration)), suppressEvents, !dur)._lock = 0;
          this._tTime = tTime;
          !suppressEvents && this.parent && _callback(this, "onRepeat");
          this.vars.repeatRefresh && !isYoyo && (this.invalidate()._lock = 1);
          if (prevTime && prevTime !== this._time || prevPaused !== !this._ts || this.vars.onRepeat && !this.parent && !this._act) {
            return this;
          }
          dur = this._dur;
          tDur = this._tDur;
          if (doesWrap) {
            this._lock = 2;
            prevTime = rewinding ? dur : -1e-4;
            this.render(prevTime, true);
            this.vars.repeatRefresh && !isYoyo && this.invalidate();
          }
          this._lock = 0;
          if (!this._ts && !prevPaused) {
            return this;
          }
          _propagateYoyoEase(this, isYoyo);
        }
      }
      if (this._hasPause && !this._forcing && this._lock < 2) {
        pauseTween = _findNextPauseTween(this, _roundPrecise(prevTime), _roundPrecise(time));
        if (pauseTween) {
          tTime -= time - (time = pauseTween._start);
        }
      }
      this._tTime = tTime;
      this._time = time;
      this._act = !timeScale;
      if (!this._initted) {
        this._onUpdate = this.vars.onUpdate;
        this._initted = 1;
        this._zTime = totalTime;
        prevTime = 0;
      }
      if (!prevTime && time && !suppressEvents) {
        _callback(this, "onStart");
        if (this._tTime !== tTime) {
          return this;
        }
      }
      if (time >= prevTime && totalTime >= 0) {
        child = this._first;
        while (child) {
          next = child._next;
          if ((child._act || time >= child._start) && child._ts && pauseTween !== child) {
            if (child.parent !== this) {
              return this.render(totalTime, suppressEvents, force);
            }
            child.render(child._ts > 0 ? (time - child._start) * child._ts : (child._dirty ? child.totalDuration() : child._tDur) + (time - child._start) * child._ts, suppressEvents, force);
            if (time !== this._time || !this._ts && !prevPaused) {
              pauseTween = 0;
              next && (tTime += this._zTime = -_tinyNum);
              break;
            }
          }
          child = next;
        }
      } else {
        child = this._last;
        var adjustedTime = totalTime < 0 ? totalTime : time;
        while (child) {
          next = child._prev;
          if ((child._act || adjustedTime <= child._end) && child._ts && pauseTween !== child) {
            if (child.parent !== this) {
              return this.render(totalTime, suppressEvents, force);
            }
            child.render(child._ts > 0 ? (adjustedTime - child._start) * child._ts : (child._dirty ? child.totalDuration() : child._tDur) + (adjustedTime - child._start) * child._ts, suppressEvents, force);
            if (time !== this._time || !this._ts && !prevPaused) {
              pauseTween = 0;
              next && (tTime += this._zTime = adjustedTime ? -_tinyNum : _tinyNum);
              break;
            }
          }
          child = next;
        }
      }
      if (pauseTween && !suppressEvents) {
        this.pause();
        pauseTween.render(time >= prevTime ? 0 : -_tinyNum)._zTime = time >= prevTime ? 1 : -1;
        if (this._ts) {
          this._start = prevStart;
          _setEnd(this);
          return this.render(totalTime, suppressEvents, force);
        }
      }
      this._onUpdate && !suppressEvents && _callback(this, "onUpdate", true);
      if (tTime === tDur && this._tTime >= this.totalDuration() || !tTime && prevTime) {
        if (prevStart === this._start || Math.abs(timeScale) !== Math.abs(this._ts)) {
          if (!this._lock) {
            (totalTime || !dur) && (tTime === tDur && this._ts > 0 || !tTime && this._ts < 0) && _removeFromParent(this, 1);
            if (!suppressEvents && !(totalTime < 0 && !prevTime) && (tTime || prevTime || !tDur)) {
              _callback(this, tTime === tDur && totalTime >= 0 ? "onComplete" : "onReverseComplete", true);
              this._prom && !(tTime < tDur && this.timeScale() > 0) && this._prom();
            }
          }
        }
      }
    }
    return this;
  };
  _proto2.add = function add(child, position) {
    var _this2 = this;
    _isNumber(position) || (position = _parsePosition(this, position, child));
    if (!(child instanceof Animation)) {
      if (_isArray(child)) {
        child.forEach(function(obj) {
          return _this2.add(obj, position);
        });
        return this;
      }
      if (_isString(child)) {
        return this.addLabel(child, position);
      }
      if (_isFunction(child)) {
        child = Tween.delayedCall(0, child);
      } else {
        return this;
      }
    }
    return this !== child ? _addToTimeline(this, child, position) : this;
  };
  _proto2.getChildren = function getChildren(nested, tweens, timelines, ignoreBeforeTime) {
    if (nested === void 0) {
      nested = true;
    }
    if (tweens === void 0) {
      tweens = true;
    }
    if (timelines === void 0) {
      timelines = true;
    }
    if (ignoreBeforeTime === void 0) {
      ignoreBeforeTime = -_bigNum;
    }
    var a = [], child = this._first;
    while (child) {
      if (child._start >= ignoreBeforeTime) {
        if (child instanceof Tween) {
          tweens && a.push(child);
        } else {
          timelines && a.push(child);
          nested && a.push.apply(a, child.getChildren(true, tweens, timelines));
        }
      }
      child = child._next;
    }
    return a;
  };
  _proto2.getById = function getById2(id) {
    var animations = this.getChildren(1, 1, 1), i = animations.length;
    while (i--) {
      if (animations[i].vars.id === id) {
        return animations[i];
      }
    }
  };
  _proto2.remove = function remove(child) {
    if (_isString(child)) {
      return this.removeLabel(child);
    }
    if (_isFunction(child)) {
      return this.killTweensOf(child);
    }
    _removeLinkedListItem(this, child);
    if (child === this._recent) {
      this._recent = this._last;
    }
    return _uncache(this);
  };
  _proto2.totalTime = function totalTime(_totalTime2, suppressEvents) {
    if (!arguments.length) {
      return this._tTime;
    }
    this._forcing = 1;
    if (!this._dp && this._ts) {
      this._start = _roundPrecise(_ticker.time - (this._ts > 0 ? _totalTime2 / this._ts : (this.totalDuration() - _totalTime2) / -this._ts));
    }
    _Animation.prototype.totalTime.call(this, _totalTime2, suppressEvents);
    this._forcing = 0;
    return this;
  };
  _proto2.addLabel = function addLabel(label, position) {
    this.labels[label] = _parsePosition(this, position);
    return this;
  };
  _proto2.removeLabel = function removeLabel(label) {
    delete this.labels[label];
    return this;
  };
  _proto2.addPause = function addPause(position, callback, params) {
    var t = Tween.delayedCall(0, callback || _emptyFunc, params);
    t.data = "isPause";
    this._hasPause = 1;
    return _addToTimeline(this, t, _parsePosition(this, position));
  };
  _proto2.removePause = function removePause(position) {
    var child = this._first;
    position = _parsePosition(this, position);
    while (child) {
      if (child._start === position && child.data === "isPause") {
        _removeFromParent(child);
      }
      child = child._next;
    }
  };
  _proto2.killTweensOf = function killTweensOf(targets, props, onlyActive) {
    var tweens = this.getTweensOf(targets, onlyActive), i = tweens.length;
    while (i--) {
      _overwritingTween !== tweens[i] && tweens[i].kill(targets, props);
    }
    return this;
  };
  _proto2.getTweensOf = function getTweensOf2(targets, onlyActive) {
    var a = [], parsedTargets = toArray(targets), child = this._first, isGlobalTime = _isNumber(onlyActive), children;
    while (child) {
      if (child instanceof Tween) {
        if (_arrayContainsAny(child._targets, parsedTargets) && (isGlobalTime ? (!_overwritingTween || child._initted && child._ts) && child.globalTime(0) <= onlyActive && child.globalTime(child.totalDuration()) > onlyActive : !onlyActive || child.isActive())) {
          a.push(child);
        }
      } else if ((children = child.getTweensOf(parsedTargets, onlyActive)).length) {
        a.push.apply(a, children);
      }
      child = child._next;
    }
    return a;
  };
  _proto2.tweenTo = function tweenTo(position, vars) {
    vars = vars || {};
    var tl = this, endTime = _parsePosition(tl, position), _vars = vars, startAt = _vars.startAt, _onStart = _vars.onStart, onStartParams = _vars.onStartParams, immediateRender = _vars.immediateRender, initted, tween = Tween.to(tl, _setDefaults({
      ease: vars.ease || "none",
      lazy: false,
      immediateRender: false,
      time: endTime,
      overwrite: "auto",
      duration: vars.duration || Math.abs((endTime - (startAt && "time" in startAt ? startAt.time : tl._time)) / tl.timeScale()) || _tinyNum,
      onStart: function onStart() {
        tl.pause();
        if (!initted) {
          var duration = vars.duration || Math.abs((endTime - (startAt && "time" in startAt ? startAt.time : tl._time)) / tl.timeScale());
          tween._dur !== duration && _setDuration(tween, duration, 0, 1).render(tween._time, true, true);
          initted = 1;
        }
        _onStart && _onStart.apply(tween, onStartParams || []);
      }
    }, vars));
    return immediateRender ? tween.render(0) : tween;
  };
  _proto2.tweenFromTo = function tweenFromTo(fromPosition, toPosition, vars) {
    return this.tweenTo(toPosition, _setDefaults({
      startAt: {
        time: _parsePosition(this, fromPosition)
      }
    }, vars));
  };
  _proto2.recent = function recent() {
    return this._recent;
  };
  _proto2.nextLabel = function nextLabel(afterTime) {
    if (afterTime === void 0) {
      afterTime = this._time;
    }
    return _getLabelInDirection(this, _parsePosition(this, afterTime));
  };
  _proto2.previousLabel = function previousLabel(beforeTime) {
    if (beforeTime === void 0) {
      beforeTime = this._time;
    }
    return _getLabelInDirection(this, _parsePosition(this, beforeTime), 1);
  };
  _proto2.currentLabel = function currentLabel(value) {
    return arguments.length ? this.seek(value, true) : this.previousLabel(this._time + _tinyNum);
  };
  _proto2.shiftChildren = function shiftChildren(amount, adjustLabels, ignoreBeforeTime) {
    if (ignoreBeforeTime === void 0) {
      ignoreBeforeTime = 0;
    }
    var child = this._first, labels = this.labels, p;
    while (child) {
      if (child._start >= ignoreBeforeTime) {
        child._start += amount;
        child._end += amount;
      }
      child = child._next;
    }
    if (adjustLabels) {
      for (p in labels) {
        if (labels[p] >= ignoreBeforeTime) {
          labels[p] += amount;
        }
      }
    }
    return _uncache(this);
  };
  _proto2.invalidate = function invalidate() {
    var child = this._first;
    this._lock = 0;
    while (child) {
      child.invalidate();
      child = child._next;
    }
    return _Animation.prototype.invalidate.call(this);
  };
  _proto2.clear = function clear(includeLabels) {
    if (includeLabels === void 0) {
      includeLabels = true;
    }
    var child = this._first, next;
    while (child) {
      next = child._next;
      this.remove(child);
      child = next;
    }
    this._dp && (this._time = this._tTime = this._pTime = 0);
    includeLabels && (this.labels = {});
    return _uncache(this);
  };
  _proto2.totalDuration = function totalDuration(value) {
    var max = 0, self = this, child = self._last, prevStart = _bigNum, prev, start, parent;
    if (arguments.length) {
      return self.timeScale((self._repeat < 0 ? self.duration() : self.totalDuration()) / (self.reversed() ? -value : value));
    }
    if (self._dirty) {
      parent = self.parent;
      while (child) {
        prev = child._prev;
        child._dirty && child.totalDuration();
        start = child._start;
        if (start > prevStart && self._sort && child._ts && !self._lock) {
          self._lock = 1;
          _addToTimeline(self, child, start - child._delay, 1)._lock = 0;
        } else {
          prevStart = start;
        }
        if (start < 0 && child._ts) {
          max -= start;
          if (!parent && !self._dp || parent && parent.smoothChildTiming) {
            self._start += start / self._ts;
            self._time -= start;
            self._tTime -= start;
          }
          self.shiftChildren(-start, false, -Infinity);
          prevStart = 0;
        }
        child._end > max && child._ts && (max = child._end);
        child = prev;
      }
      _setDuration(self, self === _globalTimeline && self._time > max ? self._time : max, 1, 1);
      self._dirty = 0;
    }
    return self._tDur;
  };
  Timeline2.updateRoot = function updateRoot(time) {
    if (_globalTimeline._ts) {
      _lazySafeRender(_globalTimeline, _parentToChildTotalTime(time, _globalTimeline));
      _lastRenderedFrame = _ticker.frame;
    }
    if (_ticker.frame >= _nextGCFrame) {
      _nextGCFrame += _config.autoSleep || 120;
      var child = _globalTimeline._first;
      if (!child || !child._ts) {
        if (_config.autoSleep && _ticker._listeners.length < 2) {
          while (child && !child._ts) {
            child = child._next;
          }
          child || _ticker.sleep();
        }
      }
    }
  };
  return Timeline2;
}(Animation);
_setDefaults(Timeline.prototype, {
  _lock: 0,
  _hasPause: 0,
  _forcing: 0
});
var _addComplexStringPropTween = function _addComplexStringPropTween2(target, prop, start, end, setter, stringFilter, funcParam) {
  var pt = new PropTween(this._pt, target, prop, 0, 1, _renderComplexString, null, setter), index = 0, matchIndex = 0, result, startNums, color, endNum, chunk, startNum, hasRandom, a;
  pt.b = start;
  pt.e = end;
  start += "";
  end += "";
  if (hasRandom = ~end.indexOf("random(")) {
    end = _replaceRandom(end);
  }
  if (stringFilter) {
    a = [start, end];
    stringFilter(a, target, prop);
    start = a[0];
    end = a[1];
  }
  startNums = start.match(_complexStringNumExp) || [];
  while (result = _complexStringNumExp.exec(end)) {
    endNum = result[0];
    chunk = end.substring(index, result.index);
    if (color) {
      color = (color + 1) % 5;
    } else if (chunk.substr(-5) === "rgba(") {
      color = 1;
    }
    if (endNum !== startNums[matchIndex++]) {
      startNum = parseFloat(startNums[matchIndex - 1]) || 0;
      pt._pt = {
        _next: pt._pt,
        p: chunk || matchIndex === 1 ? chunk : ",",
        s: startNum,
        c: endNum.charAt(1) === "=" ? _parseRelative(startNum, endNum) - startNum : parseFloat(endNum) - startNum,
        m: color && color < 4 ? Math.round : 0
      };
      index = _complexStringNumExp.lastIndex;
    }
  }
  pt.c = index < end.length ? end.substring(index, end.length) : "";
  pt.fp = funcParam;
  if (_relExp.test(end) || hasRandom) {
    pt.e = 0;
  }
  this._pt = pt;
  return pt;
}, _addPropTween = function _addPropTween2(target, prop, start, end, index, targets, modifier, stringFilter, funcParam) {
  _isFunction(end) && (end = end(index || 0, target, targets));
  var currentValue = target[prop], parsedStart = start !== "get" ? start : !_isFunction(currentValue) ? currentValue : funcParam ? target[prop.indexOf("set") || !_isFunction(target["get" + prop.substr(3)]) ? prop : "get" + prop.substr(3)](funcParam) : target[prop](), setter = !_isFunction(currentValue) ? _setterPlain : funcParam ? _setterFuncWithParam : _setterFunc, pt;
  if (_isString(end)) {
    if (~end.indexOf("random(")) {
      end = _replaceRandom(end);
    }
    if (end.charAt(1) === "=") {
      pt = _parseRelative(parsedStart, end) + (getUnit(parsedStart) || 0);
      if (pt || pt === 0) {
        end = pt;
      }
    }
  }
  if (parsedStart !== end || _forceAllPropTweens) {
    if (!isNaN(parsedStart * end) && end !== "") {
      pt = new PropTween(this._pt, target, prop, +parsedStart || 0, end - (parsedStart || 0), typeof currentValue === "boolean" ? _renderBoolean : _renderPlain, 0, setter);
      funcParam && (pt.fp = funcParam);
      modifier && pt.modifier(modifier, this, target);
      return this._pt = pt;
    }
    !currentValue && !(prop in target) && _missingPlugin(prop, end);
    return _addComplexStringPropTween.call(this, target, prop, parsedStart, end, setter, stringFilter || _config.stringFilter, funcParam);
  }
}, _processVars = function _processVars2(vars, index, target, targets, tween) {
  _isFunction(vars) && (vars = _parseFuncOrString(vars, tween, index, target, targets));
  if (!_isObject(vars) || vars.style && vars.nodeType || _isArray(vars) || _isTypedArray(vars)) {
    return _isString(vars) ? _parseFuncOrString(vars, tween, index, target, targets) : vars;
  }
  var copy = {}, p;
  for (p in vars) {
    copy[p] = _parseFuncOrString(vars[p], tween, index, target, targets);
  }
  return copy;
}, _checkPlugin = function _checkPlugin2(property, vars, tween, index, target, targets) {
  var plugin, pt, ptLookup, i;
  if (_plugins[property] && (plugin = new _plugins[property]()).init(target, plugin.rawVars ? vars[property] : _processVars(vars[property], index, target, targets, tween), tween, index, targets) !== false) {
    tween._pt = pt = new PropTween(tween._pt, target, property, 0, 1, plugin.render, plugin, 0, plugin.priority);
    if (tween !== _quickTween) {
      ptLookup = tween._ptLookup[tween._targets.indexOf(target)];
      i = plugin._props.length;
      while (i--) {
        ptLookup[plugin._props[i]] = pt;
      }
    }
  }
  return plugin;
}, _overwritingTween, _forceAllPropTweens, _initTween = function _initTween2(tween, time) {
  var vars = tween.vars, ease = vars.ease, startAt = vars.startAt, immediateRender = vars.immediateRender, lazy = vars.lazy, onUpdate = vars.onUpdate, onUpdateParams = vars.onUpdateParams, callbackScope = vars.callbackScope, runBackwards = vars.runBackwards, yoyoEase = vars.yoyoEase, keyframes = vars.keyframes, autoRevert = vars.autoRevert, dur = tween._dur, prevStartAt = tween._startAt, targets = tween._targets, parent = tween.parent, fullTargets = parent && parent.data === "nested" ? parent.parent._targets : targets, autoOverwrite = tween._overwrite === "auto" && !_suppressOverwrites, tl = tween.timeline, cleanVars, i, p, pt, target, hasPriority, gsData, harness, plugin, ptLookup, index, harnessVars, overwritten;
  tl && (!keyframes || !ease) && (ease = "none");
  tween._ease = _parseEase(ease, _defaults.ease);
  tween._yEase = yoyoEase ? _invertEase(_parseEase(yoyoEase === true ? ease : yoyoEase, _defaults.ease)) : 0;
  if (yoyoEase && tween._yoyo && !tween._repeat) {
    yoyoEase = tween._yEase;
    tween._yEase = tween._ease;
    tween._ease = yoyoEase;
  }
  tween._from = !tl && !!vars.runBackwards;
  if (!tl || keyframes && !vars.stagger) {
    harness = targets[0] ? _getCache(targets[0]).harness : 0;
    harnessVars = harness && vars[harness.prop];
    cleanVars = _copyExcluding(vars, _reservedProps);
    if (prevStartAt) {
      _removeFromParent(prevStartAt.render(-1, true));
      prevStartAt._lazy = 0;
    }
    if (startAt) {
      _removeFromParent(tween._startAt = Tween.set(targets, _setDefaults({
        data: "isStart",
        overwrite: false,
        parent,
        immediateRender: true,
        lazy: _isNotFalse(lazy),
        startAt: null,
        delay: 0,
        onUpdate,
        onUpdateParams,
        callbackScope,
        stagger: 0
      }, startAt)));
      time < 0 && !immediateRender && !autoRevert && tween._startAt.render(-1, true);
      if (immediateRender) {
        time > 0 && !autoRevert && (tween._startAt = 0);
        if (dur && time <= 0) {
          time && (tween._zTime = time);
          return;
        }
      } else if (autoRevert === false) {
        tween._startAt = 0;
      }
    } else if (runBackwards && dur) {
      if (prevStartAt) {
        !autoRevert && (tween._startAt = 0);
      } else {
        time && (immediateRender = false);
        p = _setDefaults({
          overwrite: false,
          data: "isFromStart",
          lazy: immediateRender && _isNotFalse(lazy),
          immediateRender,
          stagger: 0,
          parent
        }, cleanVars);
        harnessVars && (p[harness.prop] = harnessVars);
        _removeFromParent(tween._startAt = Tween.set(targets, p));
        time < 0 && tween._startAt.render(-1, true);
        tween._zTime = time;
        if (!immediateRender) {
          _initTween2(tween._startAt, _tinyNum);
        } else if (!time) {
          return;
        }
      }
    }
    tween._pt = tween._ptCache = 0;
    lazy = dur && _isNotFalse(lazy) || lazy && !dur;
    for (i = 0; i < targets.length; i++) {
      target = targets[i];
      gsData = target._gsap || _harness(targets)[i]._gsap;
      tween._ptLookup[i] = ptLookup = {};
      _lazyLookup[gsData.id] && _lazyTweens.length && _lazyRender();
      index = fullTargets === targets ? i : fullTargets.indexOf(target);
      if (harness && (plugin = new harness()).init(target, harnessVars || cleanVars, tween, index, fullTargets) !== false) {
        tween._pt = pt = new PropTween(tween._pt, target, plugin.name, 0, 1, plugin.render, plugin, 0, plugin.priority);
        plugin._props.forEach(function(name) {
          ptLookup[name] = pt;
        });
        plugin.priority && (hasPriority = 1);
      }
      if (!harness || harnessVars) {
        for (p in cleanVars) {
          if (_plugins[p] && (plugin = _checkPlugin(p, cleanVars, tween, index, target, fullTargets))) {
            plugin.priority && (hasPriority = 1);
          } else {
            ptLookup[p] = pt = _addPropTween.call(tween, target, p, "get", cleanVars[p], index, fullTargets, 0, vars.stringFilter);
          }
        }
      }
      tween._op && tween._op[i] && tween.kill(target, tween._op[i]);
      if (autoOverwrite && tween._pt) {
        _overwritingTween = tween;
        _globalTimeline.killTweensOf(target, ptLookup, tween.globalTime(time));
        overwritten = !tween.parent;
        _overwritingTween = 0;
      }
      tween._pt && lazy && (_lazyLookup[gsData.id] = 1);
    }
    hasPriority && _sortPropTweensByPriority(tween);
    tween._onInit && tween._onInit(tween);
  }
  tween._onUpdate = onUpdate;
  tween._initted = (!tween._op || tween._pt) && !overwritten;
  keyframes && time <= 0 && tl.render(_bigNum, true, true);
}, _updatePropTweens = function _updatePropTweens2(tween, property, value, start, startIsRelative, ratio, time) {
  var ptCache = (tween._pt && tween._ptCache || (tween._ptCache = {}))[property], pt, lookup, i;
  if (!ptCache) {
    ptCache = tween._ptCache[property] = [];
    lookup = tween._ptLookup;
    i = tween._targets.length;
    while (i--) {
      pt = lookup[i][property];
      if (pt && pt.d && pt.d._pt) {
        pt = pt.d._pt;
        while (pt && pt.p !== property) {
          pt = pt._next;
        }
      }
      if (!pt) {
        _forceAllPropTweens = 1;
        tween.vars[property] = "+=0";
        _initTween(tween, time);
        _forceAllPropTweens = 0;
        return 1;
      }
      ptCache.push(pt);
    }
  }
  i = ptCache.length;
  while (i--) {
    pt = ptCache[i];
    pt.s = (start || start === 0) && !startIsRelative ? start : pt.s + (start || 0) + ratio * pt.c;
    pt.c = value - pt.s;
    pt.e && (pt.e = _round(value) + getUnit(pt.e));
    pt.b && (pt.b = pt.s + getUnit(pt.b));
  }
}, _addAliasesToVars = function _addAliasesToVars2(targets, vars) {
  var harness = targets[0] ? _getCache(targets[0]).harness : 0, propertyAliases = harness && harness.aliases, copy, p, i, aliases;
  if (!propertyAliases) {
    return vars;
  }
  copy = _merge({}, vars);
  for (p in propertyAliases) {
    if (p in copy) {
      aliases = propertyAliases[p].split(",");
      i = aliases.length;
      while (i--) {
        copy[aliases[i]] = copy[p];
      }
    }
  }
  return copy;
}, _parseKeyframe = function _parseKeyframe2(prop, obj, allProps, easeEach) {
  var ease = obj.ease || easeEach || "power1.inOut", p, a;
  if (_isArray(obj)) {
    a = allProps[prop] || (allProps[prop] = []);
    obj.forEach(function(value, i) {
      return a.push({
        t: i / (obj.length - 1) * 100,
        v: value,
        e: ease
      });
    });
  } else {
    for (p in obj) {
      a = allProps[p] || (allProps[p] = []);
      p === "ease" || a.push({
        t: parseFloat(prop),
        v: obj[p],
        e: ease
      });
    }
  }
}, _parseFuncOrString = function _parseFuncOrString2(value, tween, i, target, targets) {
  return _isFunction(value) ? value.call(tween, i, target, targets) : _isString(value) && ~value.indexOf("random(") ? _replaceRandom(value) : value;
}, _staggerTweenProps = _callbackNames + "repeat,repeatDelay,yoyo,repeatRefresh,yoyoEase,autoRevert", _staggerPropsToSkip = {};
_forEachName(_staggerTweenProps + ",id,stagger,delay,duration,paused,scrollTrigger", function(name) {
  return _staggerPropsToSkip[name] = 1;
});
var Tween = /* @__PURE__ */ function(_Animation2) {
  _inheritsLoose(Tween2, _Animation2);
  function Tween2(targets, vars, position, skipInherit) {
    var _this3;
    if (typeof vars === "number") {
      position.duration = vars;
      vars = position;
      position = null;
    }
    _this3 = _Animation2.call(this, skipInherit ? vars : _inheritDefaults(vars)) || this;
    var _this3$vars = _this3.vars, duration = _this3$vars.duration, delay = _this3$vars.delay, immediateRender = _this3$vars.immediateRender, stagger = _this3$vars.stagger, overwrite = _this3$vars.overwrite, keyframes = _this3$vars.keyframes, defaults2 = _this3$vars.defaults, scrollTrigger = _this3$vars.scrollTrigger, yoyoEase = _this3$vars.yoyoEase, parent = vars.parent || _globalTimeline, parsedTargets = (_isArray(targets) || _isTypedArray(targets) ? _isNumber(targets[0]) : "length" in vars) ? [targets] : toArray(targets), tl, i, copy, l, p, curTarget, staggerFunc, staggerVarsToMerge;
    _this3._targets = parsedTargets.length ? _harness(parsedTargets) : _warn("GSAP target " + targets + " not found. https://greensock.com", !_config.nullTargetWarn) || [];
    _this3._ptLookup = [];
    _this3._overwrite = overwrite;
    if (keyframes || stagger || _isFuncOrString(duration) || _isFuncOrString(delay)) {
      vars = _this3.vars;
      tl = _this3.timeline = new Timeline({
        data: "nested",
        defaults: defaults2 || {}
      });
      tl.kill();
      tl.parent = tl._dp = _assertThisInitialized(_this3);
      tl._start = 0;
      if (stagger || _isFuncOrString(duration) || _isFuncOrString(delay)) {
        l = parsedTargets.length;
        staggerFunc = stagger && distribute(stagger);
        if (_isObject(stagger)) {
          for (p in stagger) {
            if (~_staggerTweenProps.indexOf(p)) {
              staggerVarsToMerge || (staggerVarsToMerge = {});
              staggerVarsToMerge[p] = stagger[p];
            }
          }
        }
        for (i = 0; i < l; i++) {
          copy = _copyExcluding(vars, _staggerPropsToSkip);
          copy.stagger = 0;
          yoyoEase && (copy.yoyoEase = yoyoEase);
          staggerVarsToMerge && _merge(copy, staggerVarsToMerge);
          curTarget = parsedTargets[i];
          copy.duration = +_parseFuncOrString(duration, _assertThisInitialized(_this3), i, curTarget, parsedTargets);
          copy.delay = (+_parseFuncOrString(delay, _assertThisInitialized(_this3), i, curTarget, parsedTargets) || 0) - _this3._delay;
          if (!stagger && l === 1 && copy.delay) {
            _this3._delay = delay = copy.delay;
            _this3._start += delay;
            copy.delay = 0;
          }
          tl.to(curTarget, copy, staggerFunc ? staggerFunc(i, curTarget, parsedTargets) : 0);
          tl._ease = _easeMap.none;
        }
        tl.duration() ? duration = delay = 0 : _this3.timeline = 0;
      } else if (keyframes) {
        _inheritDefaults(_setDefaults(tl.vars.defaults, {
          ease: "none"
        }));
        tl._ease = _parseEase(keyframes.ease || vars.ease || "none");
        var time = 0, a, kf, v;
        if (_isArray(keyframes)) {
          keyframes.forEach(function(frame) {
            return tl.to(parsedTargets, frame, ">");
          });
        } else {
          copy = {};
          for (p in keyframes) {
            p === "ease" || p === "easeEach" || _parseKeyframe(p, keyframes[p], copy, keyframes.easeEach);
          }
          for (p in copy) {
            a = copy[p].sort(function(a2, b) {
              return a2.t - b.t;
            });
            time = 0;
            for (i = 0; i < a.length; i++) {
              kf = a[i];
              v = {
                ease: kf.e,
                duration: (kf.t - (i ? a[i - 1].t : 0)) / 100 * duration
              };
              v[p] = kf.v;
              tl.to(parsedTargets, v, time);
              time += v.duration;
            }
          }
          tl.duration() < duration && tl.to({}, {
            duration: duration - tl.duration()
          });
        }
      }
      duration || _this3.duration(duration = tl.duration());
    } else {
      _this3.timeline = 0;
    }
    if (overwrite === true && !_suppressOverwrites) {
      _overwritingTween = _assertThisInitialized(_this3);
      _globalTimeline.killTweensOf(parsedTargets);
      _overwritingTween = 0;
    }
    _addToTimeline(parent, _assertThisInitialized(_this3), position);
    vars.reversed && _this3.reverse();
    vars.paused && _this3.paused(true);
    if (immediateRender || !duration && !keyframes && _this3._start === _roundPrecise(parent._time) && _isNotFalse(immediateRender) && _hasNoPausedAncestors(_assertThisInitialized(_this3)) && parent.data !== "nested") {
      _this3._tTime = -_tinyNum;
      _this3.render(Math.max(0, -delay));
    }
    scrollTrigger && _scrollTrigger(_assertThisInitialized(_this3), scrollTrigger);
    return _this3;
  }
  var _proto3 = Tween2.prototype;
  _proto3.render = function render(totalTime, suppressEvents, force) {
    var prevTime = this._time, tDur = this._tDur, dur = this._dur, tTime = totalTime > tDur - _tinyNum && totalTime >= 0 ? tDur : totalTime < _tinyNum ? 0 : totalTime, time, pt, iteration, cycleDuration, prevIteration, isYoyo, ratio, timeline2, yoyoEase;
    if (!dur) {
      _renderZeroDurationTween(this, totalTime, suppressEvents, force);
    } else if (tTime !== this._tTime || !totalTime || force || !this._initted && this._tTime || this._startAt && this._zTime < 0 !== totalTime < 0) {
      time = tTime;
      timeline2 = this.timeline;
      if (this._repeat) {
        cycleDuration = dur + this._rDelay;
        if (this._repeat < -1 && totalTime < 0) {
          return this.totalTime(cycleDuration * 100 + totalTime, suppressEvents, force);
        }
        time = _roundPrecise(tTime % cycleDuration);
        if (tTime === tDur) {
          iteration = this._repeat;
          time = dur;
        } else {
          iteration = ~~(tTime / cycleDuration);
          if (iteration && iteration === tTime / cycleDuration) {
            time = dur;
            iteration--;
          }
          time > dur && (time = dur);
        }
        isYoyo = this._yoyo && iteration & 1;
        if (isYoyo) {
          yoyoEase = this._yEase;
          time = dur - time;
        }
        prevIteration = _animationCycle(this._tTime, cycleDuration);
        if (time === prevTime && !force && this._initted) {
          this._tTime = tTime;
          return this;
        }
        if (iteration !== prevIteration) {
          timeline2 && this._yEase && _propagateYoyoEase(timeline2, isYoyo);
          if (this.vars.repeatRefresh && !isYoyo && !this._lock) {
            this._lock = force = 1;
            this.render(_roundPrecise(cycleDuration * iteration), true).invalidate()._lock = 0;
          }
        }
      }
      if (!this._initted) {
        if (_attemptInitTween(this, totalTime < 0 ? totalTime : time, force, suppressEvents)) {
          this._tTime = 0;
          return this;
        }
        if (prevTime !== this._time) {
          return this;
        }
        if (dur !== this._dur) {
          return this.render(totalTime, suppressEvents, force);
        }
      }
      this._tTime = tTime;
      this._time = time;
      if (!this._act && this._ts) {
        this._act = 1;
        this._lazy = 0;
      }
      this.ratio = ratio = (yoyoEase || this._ease)(time / dur);
      if (this._from) {
        this.ratio = ratio = 1 - ratio;
      }
      if (time && !prevTime && !suppressEvents) {
        _callback(this, "onStart");
        if (this._tTime !== tTime) {
          return this;
        }
      }
      pt = this._pt;
      while (pt) {
        pt.r(ratio, pt.d);
        pt = pt._next;
      }
      timeline2 && timeline2.render(totalTime < 0 ? totalTime : !time && isYoyo ? -_tinyNum : timeline2._dur * timeline2._ease(time / this._dur), suppressEvents, force) || this._startAt && (this._zTime = totalTime);
      if (this._onUpdate && !suppressEvents) {
        totalTime < 0 && this._startAt && this._startAt.render(totalTime, true, force);
        _callback(this, "onUpdate");
      }
      this._repeat && iteration !== prevIteration && this.vars.onRepeat && !suppressEvents && this.parent && _callback(this, "onRepeat");
      if ((tTime === this._tDur || !tTime) && this._tTime === tTime) {
        totalTime < 0 && this._startAt && !this._onUpdate && this._startAt.render(totalTime, true, true);
        (totalTime || !dur) && (tTime === this._tDur && this._ts > 0 || !tTime && this._ts < 0) && _removeFromParent(this, 1);
        if (!suppressEvents && !(totalTime < 0 && !prevTime) && (tTime || prevTime)) {
          _callback(this, tTime === tDur ? "onComplete" : "onReverseComplete", true);
          this._prom && !(tTime < tDur && this.timeScale() > 0) && this._prom();
        }
      }
    }
    return this;
  };
  _proto3.targets = function targets() {
    return this._targets;
  };
  _proto3.invalidate = function invalidate() {
    this._pt = this._op = this._startAt = this._onUpdate = this._lazy = this.ratio = 0;
    this._ptLookup = [];
    this.timeline && this.timeline.invalidate();
    return _Animation2.prototype.invalidate.call(this);
  };
  _proto3.resetTo = function resetTo(property, value, start, startIsRelative) {
    _tickerActive || _ticker.wake();
    this._ts || this.play();
    var time = Math.min(this._dur, (this._dp._time - this._start) * this._ts), ratio;
    this._initted || _initTween(this, time);
    ratio = this._ease(time / this._dur);
    if (_updatePropTweens(this, property, value, start, startIsRelative, ratio, time)) {
      return this.resetTo(property, value, start, startIsRelative);
    }
    _alignPlayhead(this, 0);
    this.parent || _addLinkedListItem(this._dp, this, "_first", "_last", this._dp._sort ? "_start" : 0);
    return this.render(0);
  };
  _proto3.kill = function kill(targets, vars) {
    if (vars === void 0) {
      vars = "all";
    }
    if (!targets && (!vars || vars === "all")) {
      this._lazy = this._pt = 0;
      return this.parent ? _interrupt(this) : this;
    }
    if (this.timeline) {
      var tDur = this.timeline.totalDuration();
      this.timeline.killTweensOf(targets, vars, _overwritingTween && _overwritingTween.vars.overwrite !== true)._first || _interrupt(this);
      this.parent && tDur !== this.timeline.totalDuration() && _setDuration(this, this._dur * this.timeline._tDur / tDur, 0, 1);
      return this;
    }
    var parsedTargets = this._targets, killingTargets = targets ? toArray(targets) : parsedTargets, propTweenLookup = this._ptLookup, firstPT = this._pt, overwrittenProps, curLookup, curOverwriteProps, props, p, pt, i;
    if ((!vars || vars === "all") && _arraysMatch(parsedTargets, killingTargets)) {
      vars === "all" && (this._pt = 0);
      return _interrupt(this);
    }
    overwrittenProps = this._op = this._op || [];
    if (vars !== "all") {
      if (_isString(vars)) {
        p = {};
        _forEachName(vars, function(name) {
          return p[name] = 1;
        });
        vars = p;
      }
      vars = _addAliasesToVars(parsedTargets, vars);
    }
    i = parsedTargets.length;
    while (i--) {
      if (~killingTargets.indexOf(parsedTargets[i])) {
        curLookup = propTweenLookup[i];
        if (vars === "all") {
          overwrittenProps[i] = vars;
          props = curLookup;
          curOverwriteProps = {};
        } else {
          curOverwriteProps = overwrittenProps[i] = overwrittenProps[i] || {};
          props = vars;
        }
        for (p in props) {
          pt = curLookup && curLookup[p];
          if (pt) {
            if (!("kill" in pt.d) || pt.d.kill(p) === true) {
              _removeLinkedListItem(this, pt, "_pt");
            }
            delete curLookup[p];
          }
          if (curOverwriteProps !== "all") {
            curOverwriteProps[p] = 1;
          }
        }
      }
    }
    this._initted && !this._pt && firstPT && _interrupt(this);
    return this;
  };
  Tween2.to = function to(targets, vars) {
    return new Tween2(targets, vars, arguments[2]);
  };
  Tween2.from = function from(targets, vars) {
    return _createTweenType(1, arguments);
  };
  Tween2.delayedCall = function delayedCall(delay, callback, params, scope) {
    return new Tween2(callback, 0, {
      immediateRender: false,
      lazy: false,
      overwrite: false,
      delay,
      onComplete: callback,
      onReverseComplete: callback,
      onCompleteParams: params,
      onReverseCompleteParams: params,
      callbackScope: scope
    });
  };
  Tween2.fromTo = function fromTo(targets, fromVars, toVars) {
    return _createTweenType(2, arguments);
  };
  Tween2.set = function set(targets, vars) {
    vars.duration = 0;
    vars.repeatDelay || (vars.repeat = 0);
    return new Tween2(targets, vars);
  };
  Tween2.killTweensOf = function killTweensOf(targets, props, onlyActive) {
    return _globalTimeline.killTweensOf(targets, props, onlyActive);
  };
  return Tween2;
}(Animation);
_setDefaults(Tween.prototype, {
  _targets: [],
  _lazy: 0,
  _startAt: 0,
  _op: 0,
  _onInit: 0
});
_forEachName("staggerTo,staggerFrom,staggerFromTo", function(name) {
  Tween[name] = function() {
    var tl = new Timeline(), params = _slice.call(arguments, 0);
    params.splice(name === "staggerFromTo" ? 5 : 4, 0, 0);
    return tl[name].apply(tl, params);
  };
});
var _setterPlain = function _setterPlain2(target, property, value) {
  return target[property] = value;
}, _setterFunc = function _setterFunc2(target, property, value) {
  return target[property](value);
}, _setterFuncWithParam = function _setterFuncWithParam2(target, property, value, data) {
  return target[property](data.fp, value);
}, _setterAttribute = function _setterAttribute2(target, property, value) {
  return target.setAttribute(property, value);
}, _getSetter = function _getSetter2(target, property) {
  return _isFunction(target[property]) ? _setterFunc : _isUndefined(target[property]) && target.setAttribute ? _setterAttribute : _setterPlain;
}, _renderPlain = function _renderPlain2(ratio, data) {
  return data.set(data.t, data.p, Math.round((data.s + data.c * ratio) * 1e6) / 1e6, data);
}, _renderBoolean = function _renderBoolean2(ratio, data) {
  return data.set(data.t, data.p, !!(data.s + data.c * ratio), data);
}, _renderComplexString = function _renderComplexString2(ratio, data) {
  var pt = data._pt, s = "";
  if (!ratio && data.b) {
    s = data.b;
  } else if (ratio === 1 && data.e) {
    s = data.e;
  } else {
    while (pt) {
      s = pt.p + (pt.m ? pt.m(pt.s + pt.c * ratio) : Math.round((pt.s + pt.c * ratio) * 1e4) / 1e4) + s;
      pt = pt._next;
    }
    s += data.c;
  }
  data.set(data.t, data.p, s, data);
}, _renderPropTweens = function _renderPropTweens2(ratio, data) {
  var pt = data._pt;
  while (pt) {
    pt.r(ratio, pt.d);
    pt = pt._next;
  }
}, _addPluginModifier = function _addPluginModifier2(modifier, tween, target, property) {
  var pt = this._pt, next;
  while (pt) {
    next = pt._next;
    pt.p === property && pt.modifier(modifier, tween, target);
    pt = next;
  }
}, _killPropTweensOf = function _killPropTweensOf2(property) {
  var pt = this._pt, hasNonDependentRemaining, next;
  while (pt) {
    next = pt._next;
    if (pt.p === property && !pt.op || pt.op === property) {
      _removeLinkedListItem(this, pt, "_pt");
    } else if (!pt.dep) {
      hasNonDependentRemaining = 1;
    }
    pt = next;
  }
  return !hasNonDependentRemaining;
}, _setterWithModifier = function _setterWithModifier2(target, property, value, data) {
  data.mSet(target, property, data.m.call(data.tween, value, data.mt), data);
}, _sortPropTweensByPriority = function _sortPropTweensByPriority2(parent) {
  var pt = parent._pt, next, pt2, first, last;
  while (pt) {
    next = pt._next;
    pt2 = first;
    while (pt2 && pt2.pr > pt.pr) {
      pt2 = pt2._next;
    }
    if (pt._prev = pt2 ? pt2._prev : last) {
      pt._prev._next = pt;
    } else {
      first = pt;
    }
    if (pt._next = pt2) {
      pt2._prev = pt;
    } else {
      last = pt;
    }
    pt = next;
  }
  parent._pt = first;
};
var PropTween = /* @__PURE__ */ function() {
  function PropTween2(next, target, prop, start, change, renderer, data, setter, priority) {
    this.t = target;
    this.s = start;
    this.c = change;
    this.p = prop;
    this.r = renderer || _renderPlain;
    this.d = data || this;
    this.set = setter || _setterPlain;
    this.pr = priority || 0;
    this._next = next;
    if (next) {
      next._prev = this;
    }
  }
  var _proto4 = PropTween2.prototype;
  _proto4.modifier = function modifier(func, tween, target) {
    this.mSet = this.mSet || this.set;
    this.set = _setterWithModifier;
    this.m = func;
    this.mt = target;
    this.tween = tween;
  };
  return PropTween2;
}();
_forEachName(_callbackNames + "parent,duration,ease,delay,overwrite,runBackwards,startAt,yoyo,immediateRender,repeat,repeatDelay,data,paused,reversed,lazy,callbackScope,stringFilter,id,yoyoEase,stagger,inherit,repeatRefresh,keyframes,autoRevert,scrollTrigger", function(name) {
  return _reservedProps[name] = 1;
});
_globals.TweenMax = _globals.TweenLite = Tween;
_globals.TimelineLite = _globals.TimelineMax = Timeline;
_globalTimeline = new Timeline({
  sortChildren: false,
  defaults: _defaults,
  autoRemoveChildren: true,
  id: "root",
  smoothChildTiming: true
});
_config.stringFilter = _colorStringFilter;
var _gsap = {
  registerPlugin: function registerPlugin() {
    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }
    args.forEach(function(config3) {
      return _createPlugin(config3);
    });
  },
  timeline: function timeline(vars) {
    return new Timeline(vars);
  },
  getTweensOf: function getTweensOf(targets, onlyActive) {
    return _globalTimeline.getTweensOf(targets, onlyActive);
  },
  getProperty: function getProperty(target, property, unit, uncache) {
    _isString(target) && (target = toArray(target)[0]);
    var getter = _getCache(target || {}).get, format = unit ? _passThrough : _numericIfPossible;
    unit === "native" && (unit = "");
    return !target ? target : !property ? function(property2, unit2, uncache2) {
      return format((_plugins[property2] && _plugins[property2].get || getter)(target, property2, unit2, uncache2));
    } : format((_plugins[property] && _plugins[property].get || getter)(target, property, unit, uncache));
  },
  quickSetter: function quickSetter(target, property, unit) {
    target = toArray(target);
    if (target.length > 1) {
      var setters = target.map(function(t) {
        return gsap.quickSetter(t, property, unit);
      }), l = setters.length;
      return function(value) {
        var i = l;
        while (i--) {
          setters[i](value);
        }
      };
    }
    target = target[0] || {};
    var Plugin = _plugins[property], cache = _getCache(target), p = cache.harness && (cache.harness.aliases || {})[property] || property, setter = Plugin ? function(value) {
      var p2 = new Plugin();
      _quickTween._pt = 0;
      p2.init(target, unit ? value + unit : value, _quickTween, 0, [target]);
      p2.render(1, p2);
      _quickTween._pt && _renderPropTweens(1, _quickTween);
    } : cache.set(target, p);
    return Plugin ? setter : function(value) {
      return setter(target, p, unit ? value + unit : value, cache, 1);
    };
  },
  quickTo: function quickTo(target, property, vars) {
    var _merge22;
    var tween = gsap.to(target, _merge((_merge22 = {}, _merge22[property] = "+=0.1", _merge22.paused = true, _merge22), vars || {})), func = function func2(value, start, startIsRelative) {
      return tween.resetTo(property, value, start, startIsRelative);
    };
    func.tween = tween;
    return func;
  },
  isTweening: function isTweening(targets) {
    return _globalTimeline.getTweensOf(targets, true).length > 0;
  },
  defaults: function defaults(value) {
    value && value.ease && (value.ease = _parseEase(value.ease, _defaults.ease));
    return _mergeDeep(_defaults, value || {});
  },
  config: function config2(value) {
    return _mergeDeep(_config, value || {});
  },
  registerEffect: function registerEffect(_ref3) {
    var name = _ref3.name, effect = _ref3.effect, plugins = _ref3.plugins, defaults2 = _ref3.defaults, extendTimeline = _ref3.extendTimeline;
    (plugins || "").split(",").forEach(function(pluginName) {
      return pluginName && !_plugins[pluginName] && !_globals[pluginName] && _warn(name + " effect requires " + pluginName + " plugin.");
    });
    _effects[name] = function(targets, vars, tl) {
      return effect(toArray(targets), _setDefaults(vars || {}, defaults2), tl);
    };
    if (extendTimeline) {
      Timeline.prototype[name] = function(targets, vars, position) {
        return this.add(_effects[name](targets, _isObject(vars) ? vars : (position = vars) && {}, this), position);
      };
    }
  },
  registerEase: function registerEase(name, ease) {
    _easeMap[name] = _parseEase(ease);
  },
  parseEase: function parseEase(ease, defaultEase) {
    return arguments.length ? _parseEase(ease, defaultEase) : _easeMap;
  },
  getById: function getById(id) {
    return _globalTimeline.getById(id);
  },
  exportRoot: function exportRoot(vars, includeDelayedCalls) {
    if (vars === void 0) {
      vars = {};
    }
    var tl = new Timeline(vars), child, next;
    tl.smoothChildTiming = _isNotFalse(vars.smoothChildTiming);
    _globalTimeline.remove(tl);
    tl._dp = 0;
    tl._time = tl._tTime = _globalTimeline._time;
    child = _globalTimeline._first;
    while (child) {
      next = child._next;
      if (includeDelayedCalls || !(!child._dur && child instanceof Tween && child.vars.onComplete === child._targets[0])) {
        _addToTimeline(tl, child, child._start - child._delay);
      }
      child = next;
    }
    _addToTimeline(_globalTimeline, tl, 0);
    return tl;
  },
  utils: {
    wrap,
    wrapYoyo,
    distribute,
    random,
    snap,
    normalize: normalize$3,
    getUnit,
    clamp: clamp$1,
    splitColor,
    toArray,
    selector,
    mapRange,
    pipe,
    unitize,
    interpolate,
    shuffle
  },
  install: _install,
  effects: _effects,
  ticker: _ticker,
  updateRoot: Timeline.updateRoot,
  plugins: _plugins,
  globalTimeline: _globalTimeline,
  core: {
    PropTween,
    globals: _addGlobal,
    Tween,
    Timeline,
    Animation,
    getCache: _getCache,
    _removeLinkedListItem,
    suppressOverwrites: function suppressOverwrites(value) {
      return _suppressOverwrites = value;
    }
  }
};
_forEachName("to,from,fromTo,delayedCall,set,killTweensOf", function(name) {
  return _gsap[name] = Tween[name];
});
_ticker.add(Timeline.updateRoot);
_quickTween = _gsap.to({}, {
  duration: 0
});
var _getPluginPropTween = function _getPluginPropTween2(plugin, prop) {
  var pt = plugin._pt;
  while (pt && pt.p !== prop && pt.op !== prop && pt.fp !== prop) {
    pt = pt._next;
  }
  return pt;
}, _addModifiers = function _addModifiers2(tween, modifiers) {
  var targets = tween._targets, p, i, pt;
  for (p in modifiers) {
    i = targets.length;
    while (i--) {
      pt = tween._ptLookup[i][p];
      if (pt && (pt = pt.d)) {
        if (pt._pt) {
          pt = _getPluginPropTween(pt, p);
        }
        pt && pt.modifier && pt.modifier(modifiers[p], tween, targets[i], p);
      }
    }
  }
}, _buildModifierPlugin = function _buildModifierPlugin2(name, modifier) {
  return {
    name,
    rawVars: 1,
    init: function init4(target, vars, tween) {
      tween._onInit = function(tween2) {
        var temp, p;
        if (_isString(vars)) {
          temp = {};
          _forEachName(vars, function(name2) {
            return temp[name2] = 1;
          });
          vars = temp;
        }
        if (modifier) {
          temp = {};
          for (p in vars) {
            temp[p] = modifier(vars[p]);
          }
          vars = temp;
        }
        _addModifiers(tween2, vars);
      };
    }
  };
};
var gsap = _gsap.registerPlugin({
  name: "attr",
  init: function init(target, vars, tween, index, targets) {
    var p, pt;
    for (p in vars) {
      pt = this.add(target, "setAttribute", (target.getAttribute(p) || 0) + "", vars[p], index, targets, 0, 0, p);
      pt && (pt.op = p);
      this._props.push(p);
    }
  }
}, {
  name: "endArray",
  init: function init2(target, value) {
    var i = value.length;
    while (i--) {
      this.add(target, i, target[i] || 0, value[i]);
    }
  }
}, _buildModifierPlugin("roundProps", _roundModifier), _buildModifierPlugin("modifiers"), _buildModifierPlugin("snap", snap)) || _gsap;
Tween.version = Timeline.version = gsap.version = "3.10.4";
_coreReady = 1;
_windowExists() && _wake();
_easeMap.Power0; _easeMap.Power1; _easeMap.Power2; _easeMap.Power3; _easeMap.Power4; _easeMap.Linear; _easeMap.Quad; _easeMap.Cubic; _easeMap.Quart; _easeMap.Quint; _easeMap.Strong; _easeMap.Elastic; _easeMap.Back; _easeMap.SteppedEase; _easeMap.Bounce; _easeMap.Sine; _easeMap.Expo; _easeMap.Circ;
/*!
 * CSSPlugin 3.10.4
 * https://greensock.com
 *
 * Copyright 2008-2022, GreenSock. All rights reserved.
 * Subject to the terms at https://greensock.com/standard-license or for
 * Club GreenSock members, the agreement issued with that membership.
 * @author: Jack Doyle, jack@greensock.com
*/
var _win$1, _doc$1, _docElement, _pluginInitted, _tempDiv, _recentSetterPlugin, _windowExists$1 = function _windowExists3() {
  return typeof window !== "undefined";
}, _transformProps = {}, _RAD2DEG = 180 / Math.PI, _DEG2RAD = Math.PI / 180, _atan2 = Math.atan2, _bigNum$1 = 1e8, _capsExp = /([A-Z])/g, _horizontalExp = /(left|right|width|margin|padding|x)/i, _complexExp = /[\s,\(]\S/, _propertyAliases = {
  autoAlpha: "opacity,visibility",
  scale: "scaleX,scaleY",
  alpha: "opacity"
}, _renderCSSProp = function _renderCSSProp2(ratio, data) {
  return data.set(data.t, data.p, Math.round((data.s + data.c * ratio) * 1e4) / 1e4 + data.u, data);
}, _renderPropWithEnd = function _renderPropWithEnd2(ratio, data) {
  return data.set(data.t, data.p, ratio === 1 ? data.e : Math.round((data.s + data.c * ratio) * 1e4) / 1e4 + data.u, data);
}, _renderCSSPropWithBeginning = function _renderCSSPropWithBeginning2(ratio, data) {
  return data.set(data.t, data.p, ratio ? Math.round((data.s + data.c * ratio) * 1e4) / 1e4 + data.u : data.b, data);
}, _renderRoundedCSSProp = function _renderRoundedCSSProp2(ratio, data) {
  var value = data.s + data.c * ratio;
  data.set(data.t, data.p, ~~(value + (value < 0 ? -0.5 : 0.5)) + data.u, data);
}, _renderNonTweeningValue = function _renderNonTweeningValue2(ratio, data) {
  return data.set(data.t, data.p, ratio ? data.e : data.b, data);
}, _renderNonTweeningValueOnlyAtEnd = function _renderNonTweeningValueOnlyAtEnd2(ratio, data) {
  return data.set(data.t, data.p, ratio !== 1 ? data.b : data.e, data);
}, _setterCSSStyle = function _setterCSSStyle2(target, property, value) {
  return target.style[property] = value;
}, _setterCSSProp = function _setterCSSProp2(target, property, value) {
  return target.style.setProperty(property, value);
}, _setterTransform = function _setterTransform2(target, property, value) {
  return target._gsap[property] = value;
}, _setterScale = function _setterScale2(target, property, value) {
  return target._gsap.scaleX = target._gsap.scaleY = value;
}, _setterScaleWithRender = function _setterScaleWithRender2(target, property, value, data, ratio) {
  var cache = target._gsap;
  cache.scaleX = cache.scaleY = value;
  cache.renderTransform(ratio, cache);
}, _setterTransformWithRender = function _setterTransformWithRender2(target, property, value, data, ratio) {
  var cache = target._gsap;
  cache[property] = value;
  cache.renderTransform(ratio, cache);
}, _transformProp = "transform", _transformOriginProp = _transformProp + "Origin", _supports3D, _createElement = function _createElement2(type, ns) {
  var e = _doc$1.createElementNS ? _doc$1.createElementNS((ns || "http://www.w3.org/1999/xhtml").replace(/^https/, "http"), type) : _doc$1.createElement(type);
  return e.style ? e : _doc$1.createElement(type);
}, _getComputedProperty = function _getComputedProperty2(target, property, skipPrefixFallback) {
  var cs = getComputedStyle(target);
  return cs[property] || cs.getPropertyValue(property.replace(_capsExp, "-$1").toLowerCase()) || cs.getPropertyValue(property) || !skipPrefixFallback && _getComputedProperty2(target, _checkPropPrefix(property) || property, 1) || "";
}, _prefixes = "O,Moz,ms,Ms,Webkit".split(","), _checkPropPrefix = function _checkPropPrefix2(property, element, preferPrefix) {
  var e = element || _tempDiv, s = e.style, i = 5;
  if (property in s && !preferPrefix) {
    return property;
  }
  property = property.charAt(0).toUpperCase() + property.substr(1);
  while (i-- && !(_prefixes[i] + property in s)) {
  }
  return i < 0 ? null : (i === 3 ? "ms" : i >= 0 ? _prefixes[i] : "") + property;
}, _initCore = function _initCore2() {
  if (_windowExists$1() && window.document) {
    _win$1 = window;
    _doc$1 = _win$1.document;
    _docElement = _doc$1.documentElement;
    _tempDiv = _createElement("div") || {
      style: {}
    };
    _createElement("div");
    _transformProp = _checkPropPrefix(_transformProp);
    _transformOriginProp = _transformProp + "Origin";
    _tempDiv.style.cssText = "border-width:0;line-height:0;position:absolute;padding:0";
    _supports3D = !!_checkPropPrefix("perspective");
    _pluginInitted = 1;
  }
}, _getBBoxHack = function _getBBoxHack2(swapIfPossible) {
  var svg = _createElement("svg", this.ownerSVGElement && this.ownerSVGElement.getAttribute("xmlns") || "http://www.w3.org/2000/svg"), oldParent = this.parentNode, oldSibling = this.nextSibling, oldCSS = this.style.cssText, bbox;
  _docElement.appendChild(svg);
  svg.appendChild(this);
  this.style.display = "block";
  if (swapIfPossible) {
    try {
      bbox = this.getBBox();
      this._gsapBBox = this.getBBox;
      this.getBBox = _getBBoxHack2;
    } catch (e) {
    }
  } else if (this._gsapBBox) {
    bbox = this._gsapBBox();
  }
  if (oldParent) {
    if (oldSibling) {
      oldParent.insertBefore(this, oldSibling);
    } else {
      oldParent.appendChild(this);
    }
  }
  _docElement.removeChild(svg);
  this.style.cssText = oldCSS;
  return bbox;
}, _getAttributeFallbacks = function _getAttributeFallbacks2(target, attributesArray) {
  var i = attributesArray.length;
  while (i--) {
    if (target.hasAttribute(attributesArray[i])) {
      return target.getAttribute(attributesArray[i]);
    }
  }
}, _getBBox = function _getBBox2(target) {
  var bounds;
  try {
    bounds = target.getBBox();
  } catch (error) {
    bounds = _getBBoxHack.call(target, true);
  }
  bounds && (bounds.width || bounds.height) || target.getBBox === _getBBoxHack || (bounds = _getBBoxHack.call(target, true));
  return bounds && !bounds.width && !bounds.x && !bounds.y ? {
    x: +_getAttributeFallbacks(target, ["x", "cx", "x1"]) || 0,
    y: +_getAttributeFallbacks(target, ["y", "cy", "y1"]) || 0,
    width: 0,
    height: 0
  } : bounds;
}, _isSVG = function _isSVG2(e) {
  return !!(e.getCTM && (!e.parentNode || e.ownerSVGElement) && _getBBox(e));
}, _removeProperty = function _removeProperty2(target, property) {
  if (property) {
    var style = target.style;
    if (property in _transformProps && property !== _transformOriginProp) {
      property = _transformProp;
    }
    if (style.removeProperty) {
      if (property.substr(0, 2) === "ms" || property.substr(0, 6) === "webkit") {
        property = "-" + property;
      }
      style.removeProperty(property.replace(_capsExp, "-$1").toLowerCase());
    } else {
      style.removeAttribute(property);
    }
  }
}, _addNonTweeningPT = function _addNonTweeningPT2(plugin, target, property, beginning, end, onlySetAtEnd) {
  var pt = new PropTween(plugin._pt, target, property, 0, 1, onlySetAtEnd ? _renderNonTweeningValueOnlyAtEnd : _renderNonTweeningValue);
  plugin._pt = pt;
  pt.b = beginning;
  pt.e = end;
  plugin._props.push(property);
  return pt;
}, _nonConvertibleUnits = {
  deg: 1,
  rad: 1,
  turn: 1
}, _convertToUnit = function _convertToUnit2(target, property, value, unit) {
  var curValue = parseFloat(value) || 0, curUnit = (value + "").trim().substr((curValue + "").length) || "px", style = _tempDiv.style, horizontal = _horizontalExp.test(property), isRootSVG = target.tagName.toLowerCase() === "svg", measureProperty = (isRootSVG ? "client" : "offset") + (horizontal ? "Width" : "Height"), amount = 100, toPixels = unit === "px", toPercent = unit === "%", px, parent, cache, isSVG;
  if (unit === curUnit || !curValue || _nonConvertibleUnits[unit] || _nonConvertibleUnits[curUnit]) {
    return curValue;
  }
  curUnit !== "px" && !toPixels && (curValue = _convertToUnit2(target, property, value, "px"));
  isSVG = target.getCTM && _isSVG(target);
  if ((toPercent || curUnit === "%") && (_transformProps[property] || ~property.indexOf("adius"))) {
    px = isSVG ? target.getBBox()[horizontal ? "width" : "height"] : target[measureProperty];
    return _round(toPercent ? curValue / px * amount : curValue / 100 * px);
  }
  style[horizontal ? "width" : "height"] = amount + (toPixels ? curUnit : unit);
  parent = ~property.indexOf("adius") || unit === "em" && target.appendChild && !isRootSVG ? target : target.parentNode;
  if (isSVG) {
    parent = (target.ownerSVGElement || {}).parentNode;
  }
  if (!parent || parent === _doc$1 || !parent.appendChild) {
    parent = _doc$1.body;
  }
  cache = parent._gsap;
  if (cache && toPercent && cache.width && horizontal && cache.time === _ticker.time) {
    return _round(curValue / cache.width * amount);
  } else {
    (toPercent || curUnit === "%") && (style.position = _getComputedProperty(target, "position"));
    parent === target && (style.position = "static");
    parent.appendChild(_tempDiv);
    px = _tempDiv[measureProperty];
    parent.removeChild(_tempDiv);
    style.position = "absolute";
    if (horizontal && toPercent) {
      cache = _getCache(parent);
      cache.time = _ticker.time;
      cache.width = parent[measureProperty];
    }
  }
  return _round(toPixels ? px * curValue / amount : px && curValue ? amount / px * curValue : 0);
}, _get = function _get2(target, property, unit, uncache) {
  var value;
  _pluginInitted || _initCore();
  if (property in _propertyAliases && property !== "transform") {
    property = _propertyAliases[property];
    if (~property.indexOf(",")) {
      property = property.split(",")[0];
    }
  }
  if (_transformProps[property] && property !== "transform") {
    value = _parseTransform(target, uncache);
    value = property !== "transformOrigin" ? value[property] : value.svg ? value.origin : _firstTwoOnly(_getComputedProperty(target, _transformOriginProp)) + " " + value.zOrigin + "px";
  } else {
    value = target.style[property];
    if (!value || value === "auto" || uncache || ~(value + "").indexOf("calc(")) {
      value = _specialProps[property] && _specialProps[property](target, property, unit) || _getComputedProperty(target, property) || _getProperty(target, property) || (property === "opacity" ? 1 : 0);
    }
  }
  return unit && !~(value + "").trim().indexOf(" ") ? _convertToUnit(target, property, value, unit) + unit : value;
}, _tweenComplexCSSString = function _tweenComplexCSSString2(target, prop, start, end) {
  if (!start || start === "none") {
    var p = _checkPropPrefix(prop, target, 1), s = p && _getComputedProperty(target, p, 1);
    if (s && s !== start) {
      prop = p;
      start = s;
    } else if (prop === "borderColor") {
      start = _getComputedProperty(target, "borderTopColor");
    }
  }
  var pt = new PropTween(this._pt, target.style, prop, 0, 1, _renderComplexString), index = 0, matchIndex = 0, a, result, startValues, startNum, color, startValue, endValue, endNum, chunk, endUnit, startUnit, endValues;
  pt.b = start;
  pt.e = end;
  start += "";
  end += "";
  if (end === "auto") {
    target.style[prop] = end;
    end = _getComputedProperty(target, prop) || end;
    target.style[prop] = start;
  }
  a = [start, end];
  _colorStringFilter(a);
  start = a[0];
  end = a[1];
  startValues = start.match(_numWithUnitExp) || [];
  endValues = end.match(_numWithUnitExp) || [];
  if (endValues.length) {
    while (result = _numWithUnitExp.exec(end)) {
      endValue = result[0];
      chunk = end.substring(index, result.index);
      if (color) {
        color = (color + 1) % 5;
      } else if (chunk.substr(-5) === "rgba(" || chunk.substr(-5) === "hsla(") {
        color = 1;
      }
      if (endValue !== (startValue = startValues[matchIndex++] || "")) {
        startNum = parseFloat(startValue) || 0;
        startUnit = startValue.substr((startNum + "").length);
        endValue.charAt(1) === "=" && (endValue = _parseRelative(startNum, endValue) + startUnit);
        endNum = parseFloat(endValue);
        endUnit = endValue.substr((endNum + "").length);
        index = _numWithUnitExp.lastIndex - endUnit.length;
        if (!endUnit) {
          endUnit = endUnit || _config.units[prop] || startUnit;
          if (index === end.length) {
            end += endUnit;
            pt.e += endUnit;
          }
        }
        if (startUnit !== endUnit) {
          startNum = _convertToUnit(target, prop, startValue, endUnit) || 0;
        }
        pt._pt = {
          _next: pt._pt,
          p: chunk || matchIndex === 1 ? chunk : ",",
          s: startNum,
          c: endNum - startNum,
          m: color && color < 4 || prop === "zIndex" ? Math.round : 0
        };
      }
    }
    pt.c = index < end.length ? end.substring(index, end.length) : "";
  } else {
    pt.r = prop === "display" && end === "none" ? _renderNonTweeningValueOnlyAtEnd : _renderNonTweeningValue;
  }
  _relExp.test(end) && (pt.e = 0);
  this._pt = pt;
  return pt;
}, _keywordToPercent = {
  top: "0%",
  bottom: "100%",
  left: "0%",
  right: "100%",
  center: "50%"
}, _convertKeywordsToPercentages = function _convertKeywordsToPercentages2(value) {
  var split = value.split(" "), x = split[0], y = split[1] || "50%";
  if (x === "top" || x === "bottom" || y === "left" || y === "right") {
    value = x;
    x = y;
    y = value;
  }
  split[0] = _keywordToPercent[x] || x;
  split[1] = _keywordToPercent[y] || y;
  return split.join(" ");
}, _renderClearProps = function _renderClearProps2(ratio, data) {
  if (data.tween && data.tween._time === data.tween._dur) {
    var target = data.t, style = target.style, props = data.u, cache = target._gsap, prop, clearTransforms, i;
    if (props === "all" || props === true) {
      style.cssText = "";
      clearTransforms = 1;
    } else {
      props = props.split(",");
      i = props.length;
      while (--i > -1) {
        prop = props[i];
        if (_transformProps[prop]) {
          clearTransforms = 1;
          prop = prop === "transformOrigin" ? _transformOriginProp : _transformProp;
        }
        _removeProperty(target, prop);
      }
    }
    if (clearTransforms) {
      _removeProperty(target, _transformProp);
      if (cache) {
        cache.svg && target.removeAttribute("transform");
        _parseTransform(target, 1);
        cache.uncache = 1;
      }
    }
  }
}, _specialProps = {
  clearProps: function clearProps(plugin, target, property, endValue, tween) {
    if (tween.data !== "isFromStart") {
      var pt = plugin._pt = new PropTween(plugin._pt, target, property, 0, 0, _renderClearProps);
      pt.u = endValue;
      pt.pr = -10;
      pt.tween = tween;
      plugin._props.push(property);
      return 1;
    }
  }
}, _identity2DMatrix = [1, 0, 0, 1, 0, 0], _rotationalProperties = {}, _isNullTransform = function _isNullTransform2(value) {
  return value === "matrix(1, 0, 0, 1, 0, 0)" || value === "none" || !value;
}, _getComputedTransformMatrixAsArray = function _getComputedTransformMatrixAsArray2(target) {
  var matrixString = _getComputedProperty(target, _transformProp);
  return _isNullTransform(matrixString) ? _identity2DMatrix : matrixString.substr(7).match(_numExp).map(_round);
}, _getMatrix = function _getMatrix2(target, force2D) {
  var cache = target._gsap || _getCache(target), style = target.style, matrix = _getComputedTransformMatrixAsArray(target), parent, nextSibling, temp, addedToDOM;
  if (cache.svg && target.getAttribute("transform")) {
    temp = target.transform.baseVal.consolidate().matrix;
    matrix = [temp.a, temp.b, temp.c, temp.d, temp.e, temp.f];
    return matrix.join(",") === "1,0,0,1,0,0" ? _identity2DMatrix : matrix;
  } else if (matrix === _identity2DMatrix && !target.offsetParent && target !== _docElement && !cache.svg) {
    temp = style.display;
    style.display = "block";
    parent = target.parentNode;
    if (!parent || !target.offsetParent) {
      addedToDOM = 1;
      nextSibling = target.nextSibling;
      _docElement.appendChild(target);
    }
    matrix = _getComputedTransformMatrixAsArray(target);
    temp ? style.display = temp : _removeProperty(target, "display");
    if (addedToDOM) {
      nextSibling ? parent.insertBefore(target, nextSibling) : parent ? parent.appendChild(target) : _docElement.removeChild(target);
    }
  }
  return force2D && matrix.length > 6 ? [matrix[0], matrix[1], matrix[4], matrix[5], matrix[12], matrix[13]] : matrix;
}, _applySVGOrigin = function _applySVGOrigin2(target, origin, originIsAbsolute, smooth, matrixArray, pluginToAddPropTweensTo) {
  var cache = target._gsap, matrix = matrixArray || _getMatrix(target, true), xOriginOld = cache.xOrigin || 0, yOriginOld = cache.yOrigin || 0, xOffsetOld = cache.xOffset || 0, yOffsetOld = cache.yOffset || 0, a = matrix[0], b = matrix[1], c = matrix[2], d = matrix[3], tx = matrix[4], ty = matrix[5], originSplit = origin.split(" "), xOrigin = parseFloat(originSplit[0]) || 0, yOrigin = parseFloat(originSplit[1]) || 0, bounds, determinant, x, y;
  if (!originIsAbsolute) {
    bounds = _getBBox(target);
    xOrigin = bounds.x + (~originSplit[0].indexOf("%") ? xOrigin / 100 * bounds.width : xOrigin);
    yOrigin = bounds.y + (~(originSplit[1] || originSplit[0]).indexOf("%") ? yOrigin / 100 * bounds.height : yOrigin);
  } else if (matrix !== _identity2DMatrix && (determinant = a * d - b * c)) {
    x = xOrigin * (d / determinant) + yOrigin * (-c / determinant) + (c * ty - d * tx) / determinant;
    y = xOrigin * (-b / determinant) + yOrigin * (a / determinant) - (a * ty - b * tx) / determinant;
    xOrigin = x;
    yOrigin = y;
  }
  if (smooth || smooth !== false && cache.smooth) {
    tx = xOrigin - xOriginOld;
    ty = yOrigin - yOriginOld;
    cache.xOffset = xOffsetOld + (tx * a + ty * c) - tx;
    cache.yOffset = yOffsetOld + (tx * b + ty * d) - ty;
  } else {
    cache.xOffset = cache.yOffset = 0;
  }
  cache.xOrigin = xOrigin;
  cache.yOrigin = yOrigin;
  cache.smooth = !!smooth;
  cache.origin = origin;
  cache.originIsAbsolute = !!originIsAbsolute;
  target.style[_transformOriginProp] = "0px 0px";
  if (pluginToAddPropTweensTo) {
    _addNonTweeningPT(pluginToAddPropTweensTo, cache, "xOrigin", xOriginOld, xOrigin);
    _addNonTweeningPT(pluginToAddPropTweensTo, cache, "yOrigin", yOriginOld, yOrigin);
    _addNonTweeningPT(pluginToAddPropTweensTo, cache, "xOffset", xOffsetOld, cache.xOffset);
    _addNonTweeningPT(pluginToAddPropTweensTo, cache, "yOffset", yOffsetOld, cache.yOffset);
  }
  target.setAttribute("data-svg-origin", xOrigin + " " + yOrigin);
}, _parseTransform = function _parseTransform2(target, uncache) {
  var cache = target._gsap || new GSCache(target);
  if ("x" in cache && !uncache && !cache.uncache) {
    return cache;
  }
  var style = target.style, invertedScaleX = cache.scaleX < 0, px = "px", deg = "deg", origin = _getComputedProperty(target, _transformOriginProp) || "0", x, y, z, scaleX, scaleY, rotation, rotationX, rotationY, skewX, skewY, perspective, xOrigin, yOrigin, matrix, angle, cos, sin, a, b, c, d, a12, a22, t1, t2, t3, a13, a23, a33, a42, a43, a32;
  x = y = z = rotation = rotationX = rotationY = skewX = skewY = perspective = 0;
  scaleX = scaleY = 1;
  cache.svg = !!(target.getCTM && _isSVG(target));
  matrix = _getMatrix(target, cache.svg);
  if (cache.svg) {
    t1 = (!cache.uncache || origin === "0px 0px") && !uncache && target.getAttribute("data-svg-origin");
    _applySVGOrigin(target, t1 || origin, !!t1 || cache.originIsAbsolute, cache.smooth !== false, matrix);
  }
  xOrigin = cache.xOrigin || 0;
  yOrigin = cache.yOrigin || 0;
  if (matrix !== _identity2DMatrix) {
    a = matrix[0];
    b = matrix[1];
    c = matrix[2];
    d = matrix[3];
    x = a12 = matrix[4];
    y = a22 = matrix[5];
    if (matrix.length === 6) {
      scaleX = Math.sqrt(a * a + b * b);
      scaleY = Math.sqrt(d * d + c * c);
      rotation = a || b ? _atan2(b, a) * _RAD2DEG : 0;
      skewX = c || d ? _atan2(c, d) * _RAD2DEG + rotation : 0;
      skewX && (scaleY *= Math.abs(Math.cos(skewX * _DEG2RAD)));
      if (cache.svg) {
        x -= xOrigin - (xOrigin * a + yOrigin * c);
        y -= yOrigin - (xOrigin * b + yOrigin * d);
      }
    } else {
      a32 = matrix[6];
      a42 = matrix[7];
      a13 = matrix[8];
      a23 = matrix[9];
      a33 = matrix[10];
      a43 = matrix[11];
      x = matrix[12];
      y = matrix[13];
      z = matrix[14];
      angle = _atan2(a32, a33);
      rotationX = angle * _RAD2DEG;
      if (angle) {
        cos = Math.cos(-angle);
        sin = Math.sin(-angle);
        t1 = a12 * cos + a13 * sin;
        t2 = a22 * cos + a23 * sin;
        t3 = a32 * cos + a33 * sin;
        a13 = a12 * -sin + a13 * cos;
        a23 = a22 * -sin + a23 * cos;
        a33 = a32 * -sin + a33 * cos;
        a43 = a42 * -sin + a43 * cos;
        a12 = t1;
        a22 = t2;
        a32 = t3;
      }
      angle = _atan2(-c, a33);
      rotationY = angle * _RAD2DEG;
      if (angle) {
        cos = Math.cos(-angle);
        sin = Math.sin(-angle);
        t1 = a * cos - a13 * sin;
        t2 = b * cos - a23 * sin;
        t3 = c * cos - a33 * sin;
        a43 = d * sin + a43 * cos;
        a = t1;
        b = t2;
        c = t3;
      }
      angle = _atan2(b, a);
      rotation = angle * _RAD2DEG;
      if (angle) {
        cos = Math.cos(angle);
        sin = Math.sin(angle);
        t1 = a * cos + b * sin;
        t2 = a12 * cos + a22 * sin;
        b = b * cos - a * sin;
        a22 = a22 * cos - a12 * sin;
        a = t1;
        a12 = t2;
      }
      if (rotationX && Math.abs(rotationX) + Math.abs(rotation) > 359.9) {
        rotationX = rotation = 0;
        rotationY = 180 - rotationY;
      }
      scaleX = _round(Math.sqrt(a * a + b * b + c * c));
      scaleY = _round(Math.sqrt(a22 * a22 + a32 * a32));
      angle = _atan2(a12, a22);
      skewX = Math.abs(angle) > 2e-4 ? angle * _RAD2DEG : 0;
      perspective = a43 ? 1 / (a43 < 0 ? -a43 : a43) : 0;
    }
    if (cache.svg) {
      t1 = target.getAttribute("transform");
      cache.forceCSS = target.setAttribute("transform", "") || !_isNullTransform(_getComputedProperty(target, _transformProp));
      t1 && target.setAttribute("transform", t1);
    }
  }
  if (Math.abs(skewX) > 90 && Math.abs(skewX) < 270) {
    if (invertedScaleX) {
      scaleX *= -1;
      skewX += rotation <= 0 ? 180 : -180;
      rotation += rotation <= 0 ? 180 : -180;
    } else {
      scaleY *= -1;
      skewX += skewX <= 0 ? 180 : -180;
    }
  }
  uncache = uncache || cache.uncache;
  cache.x = x - ((cache.xPercent = x && (!uncache && cache.xPercent || (Math.round(target.offsetWidth / 2) === Math.round(-x) ? -50 : 0))) ? target.offsetWidth * cache.xPercent / 100 : 0) + px;
  cache.y = y - ((cache.yPercent = y && (!uncache && cache.yPercent || (Math.round(target.offsetHeight / 2) === Math.round(-y) ? -50 : 0))) ? target.offsetHeight * cache.yPercent / 100 : 0) + px;
  cache.z = z + px;
  cache.scaleX = _round(scaleX);
  cache.scaleY = _round(scaleY);
  cache.rotation = _round(rotation) + deg;
  cache.rotationX = _round(rotationX) + deg;
  cache.rotationY = _round(rotationY) + deg;
  cache.skewX = skewX + deg;
  cache.skewY = skewY + deg;
  cache.transformPerspective = perspective + px;
  if (cache.zOrigin = parseFloat(origin.split(" ")[2]) || 0) {
    style[_transformOriginProp] = _firstTwoOnly(origin);
  }
  cache.xOffset = cache.yOffset = 0;
  cache.force3D = _config.force3D;
  cache.renderTransform = cache.svg ? _renderSVGTransforms : _supports3D ? _renderCSSTransforms : _renderNon3DTransforms;
  cache.uncache = 0;
  return cache;
}, _firstTwoOnly = function _firstTwoOnly2(value) {
  return (value = value.split(" "))[0] + " " + value[1];
}, _addPxTranslate = function _addPxTranslate2(target, start, value) {
  var unit = getUnit(start);
  return _round(parseFloat(start) + parseFloat(_convertToUnit(target, "x", value + "px", unit))) + unit;
}, _renderNon3DTransforms = function _renderNon3DTransforms2(ratio, cache) {
  cache.z = "0px";
  cache.rotationY = cache.rotationX = "0deg";
  cache.force3D = 0;
  _renderCSSTransforms(ratio, cache);
}, _zeroDeg = "0deg", _zeroPx = "0px", _endParenthesis = ") ", _renderCSSTransforms = function _renderCSSTransforms2(ratio, cache) {
  var _ref = cache || this, xPercent = _ref.xPercent, yPercent = _ref.yPercent, x = _ref.x, y = _ref.y, z = _ref.z, rotation = _ref.rotation, rotationY = _ref.rotationY, rotationX = _ref.rotationX, skewX = _ref.skewX, skewY = _ref.skewY, scaleX = _ref.scaleX, scaleY = _ref.scaleY, transformPerspective = _ref.transformPerspective, force3D = _ref.force3D, target = _ref.target, zOrigin = _ref.zOrigin, transforms = "", use3D = force3D === "auto" && ratio && ratio !== 1 || force3D === true;
  if (zOrigin && (rotationX !== _zeroDeg || rotationY !== _zeroDeg)) {
    var angle = parseFloat(rotationY) * _DEG2RAD, a13 = Math.sin(angle), a33 = Math.cos(angle), cos;
    angle = parseFloat(rotationX) * _DEG2RAD;
    cos = Math.cos(angle);
    x = _addPxTranslate(target, x, a13 * cos * -zOrigin);
    y = _addPxTranslate(target, y, -Math.sin(angle) * -zOrigin);
    z = _addPxTranslate(target, z, a33 * cos * -zOrigin + zOrigin);
  }
  if (transformPerspective !== _zeroPx) {
    transforms += "perspective(" + transformPerspective + _endParenthesis;
  }
  if (xPercent || yPercent) {
    transforms += "translate(" + xPercent + "%, " + yPercent + "%) ";
  }
  if (use3D || x !== _zeroPx || y !== _zeroPx || z !== _zeroPx) {
    transforms += z !== _zeroPx || use3D ? "translate3d(" + x + ", " + y + ", " + z + ") " : "translate(" + x + ", " + y + _endParenthesis;
  }
  if (rotation !== _zeroDeg) {
    transforms += "rotate(" + rotation + _endParenthesis;
  }
  if (rotationY !== _zeroDeg) {
    transforms += "rotateY(" + rotationY + _endParenthesis;
  }
  if (rotationX !== _zeroDeg) {
    transforms += "rotateX(" + rotationX + _endParenthesis;
  }
  if (skewX !== _zeroDeg || skewY !== _zeroDeg) {
    transforms += "skew(" + skewX + ", " + skewY + _endParenthesis;
  }
  if (scaleX !== 1 || scaleY !== 1) {
    transforms += "scale(" + scaleX + ", " + scaleY + _endParenthesis;
  }
  target.style[_transformProp] = transforms || "translate(0, 0)";
}, _renderSVGTransforms = function _renderSVGTransforms2(ratio, cache) {
  var _ref2 = cache || this, xPercent = _ref2.xPercent, yPercent = _ref2.yPercent, x = _ref2.x, y = _ref2.y, rotation = _ref2.rotation, skewX = _ref2.skewX, skewY = _ref2.skewY, scaleX = _ref2.scaleX, scaleY = _ref2.scaleY, target = _ref2.target, xOrigin = _ref2.xOrigin, yOrigin = _ref2.yOrigin, xOffset = _ref2.xOffset, yOffset = _ref2.yOffset, forceCSS = _ref2.forceCSS, tx = parseFloat(x), ty = parseFloat(y), a11, a21, a12, a22, temp;
  rotation = parseFloat(rotation);
  skewX = parseFloat(skewX);
  skewY = parseFloat(skewY);
  if (skewY) {
    skewY = parseFloat(skewY);
    skewX += skewY;
    rotation += skewY;
  }
  if (rotation || skewX) {
    rotation *= _DEG2RAD;
    skewX *= _DEG2RAD;
    a11 = Math.cos(rotation) * scaleX;
    a21 = Math.sin(rotation) * scaleX;
    a12 = Math.sin(rotation - skewX) * -scaleY;
    a22 = Math.cos(rotation - skewX) * scaleY;
    if (skewX) {
      skewY *= _DEG2RAD;
      temp = Math.tan(skewX - skewY);
      temp = Math.sqrt(1 + temp * temp);
      a12 *= temp;
      a22 *= temp;
      if (skewY) {
        temp = Math.tan(skewY);
        temp = Math.sqrt(1 + temp * temp);
        a11 *= temp;
        a21 *= temp;
      }
    }
    a11 = _round(a11);
    a21 = _round(a21);
    a12 = _round(a12);
    a22 = _round(a22);
  } else {
    a11 = scaleX;
    a22 = scaleY;
    a21 = a12 = 0;
  }
  if (tx && !~(x + "").indexOf("px") || ty && !~(y + "").indexOf("px")) {
    tx = _convertToUnit(target, "x", x, "px");
    ty = _convertToUnit(target, "y", y, "px");
  }
  if (xOrigin || yOrigin || xOffset || yOffset) {
    tx = _round(tx + xOrigin - (xOrigin * a11 + yOrigin * a12) + xOffset);
    ty = _round(ty + yOrigin - (xOrigin * a21 + yOrigin * a22) + yOffset);
  }
  if (xPercent || yPercent) {
    temp = target.getBBox();
    tx = _round(tx + xPercent / 100 * temp.width);
    ty = _round(ty + yPercent / 100 * temp.height);
  }
  temp = "matrix(" + a11 + "," + a21 + "," + a12 + "," + a22 + "," + tx + "," + ty + ")";
  target.setAttribute("transform", temp);
  forceCSS && (target.style[_transformProp] = temp);
}, _addRotationalPropTween = function _addRotationalPropTween2(plugin, target, property, startNum, endValue) {
  var cap = 360, isString = _isString(endValue), endNum = parseFloat(endValue) * (isString && ~endValue.indexOf("rad") ? _RAD2DEG : 1), change = endNum - startNum, finalValue = startNum + change + "deg", direction, pt;
  if (isString) {
    direction = endValue.split("_")[1];
    if (direction === "short") {
      change %= cap;
      if (change !== change % (cap / 2)) {
        change += change < 0 ? cap : -cap;
      }
    }
    if (direction === "cw" && change < 0) {
      change = (change + cap * _bigNum$1) % cap - ~~(change / cap) * cap;
    } else if (direction === "ccw" && change > 0) {
      change = (change - cap * _bigNum$1) % cap - ~~(change / cap) * cap;
    }
  }
  plugin._pt = pt = new PropTween(plugin._pt, target, property, startNum, change, _renderPropWithEnd);
  pt.e = finalValue;
  pt.u = "deg";
  plugin._props.push(property);
  return pt;
}, _assign = function _assign2(target, source) {
  for (var p in source) {
    target[p] = source[p];
  }
  return target;
}, _addRawTransformPTs = function _addRawTransformPTs2(plugin, transforms, target) {
  var startCache = _assign({}, target._gsap), exclude = "perspective,force3D,transformOrigin,svgOrigin", style = target.style, endCache, p, startValue, endValue, startNum, endNum, startUnit, endUnit;
  if (startCache.svg) {
    startValue = target.getAttribute("transform");
    target.setAttribute("transform", "");
    style[_transformProp] = transforms;
    endCache = _parseTransform(target, 1);
    _removeProperty(target, _transformProp);
    target.setAttribute("transform", startValue);
  } else {
    startValue = getComputedStyle(target)[_transformProp];
    style[_transformProp] = transforms;
    endCache = _parseTransform(target, 1);
    style[_transformProp] = startValue;
  }
  for (p in _transformProps) {
    startValue = startCache[p];
    endValue = endCache[p];
    if (startValue !== endValue && exclude.indexOf(p) < 0) {
      startUnit = getUnit(startValue);
      endUnit = getUnit(endValue);
      startNum = startUnit !== endUnit ? _convertToUnit(target, p, startValue, endUnit) : parseFloat(startValue);
      endNum = parseFloat(endValue);
      plugin._pt = new PropTween(plugin._pt, endCache, p, startNum, endNum - startNum, _renderCSSProp);
      plugin._pt.u = endUnit || 0;
      plugin._props.push(p);
    }
  }
  _assign(endCache, startCache);
};
_forEachName("padding,margin,Width,Radius", function(name, index) {
  var t = "Top", r = "Right", b = "Bottom", l = "Left", props = (index < 3 ? [t, r, b, l] : [t + l, t + r, b + r, b + l]).map(function(side) {
    return index < 2 ? name + side : "border" + side + name;
  });
  _specialProps[index > 1 ? "border" + name : name] = function(plugin, target, property, endValue, tween) {
    var a, vars;
    if (arguments.length < 4) {
      a = props.map(function(prop) {
        return _get(plugin, prop, property);
      });
      vars = a.join(" ");
      return vars.split(a[0]).length === 5 ? a[0] : vars;
    }
    a = (endValue + "").split(" ");
    vars = {};
    props.forEach(function(prop, i) {
      return vars[prop] = a[i] = a[i] || a[(i - 1) / 2 | 0];
    });
    plugin.init(target, vars, tween);
  };
});
var CSSPlugin = {
  name: "css",
  register: _initCore,
  targetTest: function targetTest(target) {
    return target.style && target.nodeType;
  },
  init: function init3(target, vars, tween, index, targets) {
    var props = this._props, style = target.style, startAt = tween.vars.startAt, startValue, endValue, endNum, startNum, type, specialProp, p, startUnit, endUnit, relative, isTransformRelated, transformPropTween, cache, smooth, hasPriority;
    _pluginInitted || _initCore();
    for (p in vars) {
      if (p === "autoRound") {
        continue;
      }
      endValue = vars[p];
      if (_plugins[p] && _checkPlugin(p, vars, tween, index, target, targets)) {
        continue;
      }
      type = typeof endValue;
      specialProp = _specialProps[p];
      if (type === "function") {
        endValue = endValue.call(tween, index, target, targets);
        type = typeof endValue;
      }
      if (type === "string" && ~endValue.indexOf("random(")) {
        endValue = _replaceRandom(endValue);
      }
      if (specialProp) {
        specialProp(this, target, p, endValue, tween) && (hasPriority = 1);
      } else if (p.substr(0, 2) === "--") {
        startValue = (getComputedStyle(target).getPropertyValue(p) + "").trim();
        endValue += "";
        _colorExp.lastIndex = 0;
        if (!_colorExp.test(startValue)) {
          startUnit = getUnit(startValue);
          endUnit = getUnit(endValue);
        }
        endUnit ? startUnit !== endUnit && (startValue = _convertToUnit(target, p, startValue, endUnit) + endUnit) : startUnit && (endValue += startUnit);
        this.add(style, "setProperty", startValue, endValue, index, targets, 0, 0, p);
        props.push(p);
      } else if (type !== "undefined") {
        if (startAt && p in startAt) {
          startValue = typeof startAt[p] === "function" ? startAt[p].call(tween, index, target, targets) : startAt[p];
          _isString(startValue) && ~startValue.indexOf("random(") && (startValue = _replaceRandom(startValue));
          getUnit(startValue + "") || (startValue += _config.units[p] || getUnit(_get(target, p)) || "");
          (startValue + "").charAt(1) === "=" && (startValue = _get(target, p));
        } else {
          startValue = _get(target, p);
        }
        startNum = parseFloat(startValue);
        relative = type === "string" && endValue.charAt(1) === "=" && endValue.substr(0, 2);
        relative && (endValue = endValue.substr(2));
        endNum = parseFloat(endValue);
        if (p in _propertyAliases) {
          if (p === "autoAlpha") {
            if (startNum === 1 && _get(target, "visibility") === "hidden" && endNum) {
              startNum = 0;
            }
            _addNonTweeningPT(this, style, "visibility", startNum ? "inherit" : "hidden", endNum ? "inherit" : "hidden", !endNum);
          }
          if (p !== "scale" && p !== "transform") {
            p = _propertyAliases[p];
            ~p.indexOf(",") && (p = p.split(",")[0]);
          }
        }
        isTransformRelated = p in _transformProps;
        if (isTransformRelated) {
          if (!transformPropTween) {
            cache = target._gsap;
            cache.renderTransform && !vars.parseTransform || _parseTransform(target, vars.parseTransform);
            smooth = vars.smoothOrigin !== false && cache.smooth;
            transformPropTween = this._pt = new PropTween(this._pt, style, _transformProp, 0, 1, cache.renderTransform, cache, 0, -1);
            transformPropTween.dep = 1;
          }
          if (p === "scale") {
            this._pt = new PropTween(this._pt, cache, "scaleY", cache.scaleY, (relative ? _parseRelative(cache.scaleY, relative + endNum) : endNum) - cache.scaleY || 0);
            props.push("scaleY", p);
            p += "X";
          } else if (p === "transformOrigin") {
            endValue = _convertKeywordsToPercentages(endValue);
            if (cache.svg) {
              _applySVGOrigin(target, endValue, 0, smooth, 0, this);
            } else {
              endUnit = parseFloat(endValue.split(" ")[2]) || 0;
              endUnit !== cache.zOrigin && _addNonTweeningPT(this, cache, "zOrigin", cache.zOrigin, endUnit);
              _addNonTweeningPT(this, style, p, _firstTwoOnly(startValue), _firstTwoOnly(endValue));
            }
            continue;
          } else if (p === "svgOrigin") {
            _applySVGOrigin(target, endValue, 1, smooth, 0, this);
            continue;
          } else if (p in _rotationalProperties) {
            _addRotationalPropTween(this, cache, p, startNum, relative ? _parseRelative(startNum, relative + endValue) : endValue);
            continue;
          } else if (p === "smoothOrigin") {
            _addNonTweeningPT(this, cache, "smooth", cache.smooth, endValue);
            continue;
          } else if (p === "force3D") {
            cache[p] = endValue;
            continue;
          } else if (p === "transform") {
            _addRawTransformPTs(this, endValue, target);
            continue;
          }
        } else if (!(p in style)) {
          p = _checkPropPrefix(p) || p;
        }
        if (isTransformRelated || (endNum || endNum === 0) && (startNum || startNum === 0) && !_complexExp.test(endValue) && p in style) {
          startUnit = (startValue + "").substr((startNum + "").length);
          endNum || (endNum = 0);
          endUnit = getUnit(endValue) || (p in _config.units ? _config.units[p] : startUnit);
          startUnit !== endUnit && (startNum = _convertToUnit(target, p, startValue, endUnit));
          this._pt = new PropTween(this._pt, isTransformRelated ? cache : style, p, startNum, (relative ? _parseRelative(startNum, relative + endNum) : endNum) - startNum, !isTransformRelated && (endUnit === "px" || p === "zIndex") && vars.autoRound !== false ? _renderRoundedCSSProp : _renderCSSProp);
          this._pt.u = endUnit || 0;
          if (startUnit !== endUnit && endUnit !== "%") {
            this._pt.b = startValue;
            this._pt.r = _renderCSSPropWithBeginning;
          }
        } else if (!(p in style)) {
          if (p in target) {
            this.add(target, p, startValue || target[p], relative ? relative + endValue : endValue, index, targets);
          } else {
            _missingPlugin(p, endValue);
            continue;
          }
        } else {
          _tweenComplexCSSString.call(this, target, p, startValue, relative ? relative + endValue : endValue);
        }
        props.push(p);
      }
    }
    hasPriority && _sortPropTweensByPriority(this);
  },
  get: _get,
  aliases: _propertyAliases,
  getSetter: function getSetter(target, property, plugin) {
    var p = _propertyAliases[property];
    p && p.indexOf(",") < 0 && (property = p);
    return property in _transformProps && property !== _transformOriginProp && (target._gsap.x || _get(target, "x")) ? plugin && _recentSetterPlugin === plugin ? property === "scale" ? _setterScale : _setterTransform : (_recentSetterPlugin = plugin || {}) && (property === "scale" ? _setterScaleWithRender : _setterTransformWithRender) : target.style && !_isUndefined(target.style[property]) ? _setterCSSStyle : ~property.indexOf("-") ? _setterCSSProp : _getSetter(target, property);
  },
  core: {
    _removeProperty,
    _getMatrix
  }
};
gsap.utils.checkPrefix = _checkPropPrefix;
(function(positionAndScale, rotation, others, aliases) {
  var all = _forEachName(positionAndScale + "," + rotation + "," + others, function(name) {
    _transformProps[name] = 1;
  });
  _forEachName(rotation, function(name) {
    _config.units[name] = "deg";
    _rotationalProperties[name] = 1;
  });
  _propertyAliases[all[13]] = positionAndScale + "," + rotation;
  _forEachName(aliases, function(name) {
    var split = name.split(":");
    _propertyAliases[split[1]] = all[split[0]];
  });
})("x,y,z,scale,scaleX,scaleY,xPercent,yPercent", "rotation,rotationX,rotationY,skewX,skewY", "transform,transformOrigin,svgOrigin,force3D,smoothOrigin,transformPerspective", "0:translateX,1:translateY,2:translateZ,8:rotate,8:rotationZ,8:rotateZ,9:rotateX,10:rotateY");
_forEachName("x,y,z,top,right,bottom,left,width,height,fontSize,padding,margin,perspective", function(name) {
  _config.units[name] = "px";
});
gsap.registerPlugin(CSSPlugin);
var gsapWithCSS = gsap.registerPlugin(CSSPlugin) || gsap, TweenMaxWithCSS = gsapWithCSS.core.Tween;

class p {
  constructor(t) {
    this.epsilon = 1e-3, this.values = {}, this.targetValues = {}, this.deltaValues = {}, Object.assign(this.values, t.values), Object.assign(this.targetValues, t.values), this.deltaValues = {};
    for (const t2 in this.values)
      this.deltaValues[t2] = 0;
    this.dampingFactor = t.dampingFactor, t.epsilon && (this.epsilon = t.epsilon), this.hasReached = true;
  }
  update() {
    const t = {};
    let e = true;
    for (const i in this.values)
      t[i] = this.targetValues[i] - this.values[i], e = e && Math.abs(t[i]) < this.epsilon;
    if (e) {
      for (const e2 in this.values)
        this.deltaValues[e2] = t[e2], this.values[e2] = this.targetValues[e2];
      this.hasReached = true;
    } else
      for (const e2 in this.values)
        this.deltaValues[e2] = this.dampingFactor * t[e2], this.values[e2] += this.deltaValues[e2];
  }
  setTarget(t) {
    for (const e in t)
      this.targetValues[e] = t[e];
    this.hasReached = false;
  }
  addToTarget(t, e) {
    this.targetValues[t] += e, this.hasReached = false;
  }
  resetAll(t) {
    for (const e in this.values)
      this.targetValues[e] = t, this.values[e] = t, this.deltaValues[e] = 0;
    this.hasReached = true;
  }
  resetData(t) {
    for (const e in t)
      this.targetValues[e] = t[e], this.values[e] = t[e], this.deltaValues[e] = 0;
    this.hasReached = true;
  }
  getCurrentValues() {
    return Object.assign({}, this.values);
  }
  getDeltaValues() {
    return Object.assign({}, this.deltaValues);
  }
  reachedTarget() {
    return this.hasReached;
  }
}
var m, u, g;
!function(t) {
  t.Pan = "Pan", t.Tilt = "Tilt", t.Roll = "Roll", t.Truck = "Truck", t.Pedestal = "Pedestal", t.Dolly = "Dolly", t.Zoom = "Zoom";
}(m || (m = {})), function(t) {
  t.Body = "body", t.Head = "head", t.Eyes = "eyes";
}(u || (u = {})), function(t) {
  t.X = "x", t.Y = "y", t.Z = "z";
}(g || (g = {}));
const b = {[g.X]: new Vector3$1(1, 0, 0), [g.Y]: new Vector3$1(0, 1, 0), [g.Z]: new Vector3$1(0, 0, 1)}, y = {[g.X]: {[m.Pan]: g.X, [m.Tilt]: g.Z, [m.Roll]: g.Y}, [g.Y]: {[m.Pan]: g.Y, [m.Tilt]: g.X, [m.Roll]: g.Z}, [g.Z]: {[m.Pan]: g.Z, [m.Tilt]: g.Y, [m.Roll]: g.X}};
class v extends EventDispatcher {
  constructor(t, e) {
    super(), this.inTransit = false, this.upAxis = g.Y, this.actionAxes = y[this.upAxis], this.hasAnimation = false, this.animationTranslationObjectName = "Translation", this.animationRotationObjectName = "Rotation", this.translateAlong = {[m.Tilt]: false, [m.Pan]: true, [m.Roll]: false}, this.camera = t, this.scene = e, this.body = new Object3D(), this.head = new Object3D(), this.eyes = new Object3D(), this.head.name = this.animationRotationObjectName, this.body.name = this.animationTranslationObjectName, this.body.rotation.order = this.getRotationOrder(), this.head.rotation.order = this.getRotationOrder(), this.eyes.rotation.order = this.getRotationOrder(), this.scene.add(this.body.add(this.head.add(this.eyes.add(this.camera)))), this.cameraIsInRig = true, this.unpackTransform();
  }
  getAxisFor(t) {
    return this.actionAxes[t];
  }
  getAxisVectorFor(t) {
    return b[this.actionAxes[t]];
  }
  do(t, e, i) {
    const n = this[i];
    switch (t) {
      case m.Pan:
      case m.Tilt:
      case m.Roll: {
        const i2 = this.getAxisVectorFor(t);
        n ? n.rotateOnAxis(i2, e) : this.translateAlong[t] ? this.body.rotateOnAxis(i2, e) : this.eyes.rotateOnAxis(i2, e);
        break;
      }
      case m.Truck: {
        const t2 = this.getAxisVectorFor(m.Tilt);
        (n || this.body).translateOnAxis(t2, e);
        break;
      }
      case m.Pedestal: {
        const t2 = this.getAxisVectorFor(m.Pan);
        (n || this.body).translateOnAxis(t2, e);
        break;
      }
      case m.Dolly: {
        const t2 = this.getAxisVectorFor(m.Roll);
        (n || this.body).translateOnAxis(t2, e);
        break;
      }
      case m.Zoom:
        this.camera instanceof PerspectiveCamera && (this.camera.fov = e, this.camera.updateProjectionMatrix());
    }
  }
  getWorldCoordinates() {
    const e = new Vector3$1();
    this.camera.getWorldPosition(e);
    const i = new Quaternion$1();
    return this.camera.getWorldQuaternion(i), {position: e, quaternion: i};
  }
  setWorldCoordinates({position: t, quaternion: e}) {
    const i = new Euler().setFromQuaternion(e, this.getRotationOrder()), s = [m.Pan, m.Tilt, m.Roll];
    this.eyes.position.set(0, 0, 0), this.eyes.rotation.set(0, 0, 0), this.head.position.set(0, 0, 0), this.head.rotation.set(0, 0, 0), this.body.position.copy(t), s.forEach((t2) => {
      const e2 = this.getAxisFor(t2);
      this.translateAlong[t2] ? this.body.rotation[e2] = i[e2] : this.eyes.rotation[e2] = i[e2];
    }), this.camera.rotation.set(0, 0, 0), this.camera.position.set(0, 0, 0);
  }
  packTransform() {
    const {position: t, quaternion: e} = this.getWorldCoordinates();
    this.body.position.copy(t), this.body.rotation.set(0, 0, 0), this.head.quaternion.copy(e), this.head.position.set(0, 0, 0), this.eyes.position.set(0, 0, 0), this.eyes.rotation.set(0, 0, 0);
  }
  unpackTransform() {
    const {position: t, quaternion: e} = this.getWorldCoordinates();
    this.setWorldCoordinates({position: t, quaternion: e});
  }
  disassemble() {
    this.cameraIsInRig && (this.scene.attach(this.camera), this.cameraIsInRig = false);
  }
  assemble() {
    this.cameraIsInRig || (this.eyes.attach(this.camera), this.unpackTransform(), this.cameraIsInRig = true);
  }
  getRotationOrder() {
    return Object.values(this.actionAxes).join("").toUpperCase();
  }
  isInRig() {
    return this.cameraIsInRig;
  }
  isMoving() {
    return this.inTransit;
  }
  setUpAxis(t) {
    this.upAxis = t, this.actionAxes = y[this.upAxis], this.body.rotation.order = this.getRotationOrder();
  }
  setAnimationClip(t, e, i) {
    this.animationClip = t, e && (this.animationTranslationObjectName = e), i && (this.animationRotationObjectName = i), this.hasAnimation = true, this.animationClip.duration += 0.01, this.mixer = new AnimationMixer(this.body);
    const s = this.mixer.clipAction(this.animationClip);
    s.clampWhenFinished = true, s.play();
  }
  flyTo(t, e, i = 1, s = "power1", n = true) {
    if (!this.isMoving()) {
      const a = this.getWorldCoordinates(), o = {px: a.position.x, py: a.position.y, pz: a.position.z, qx: a.quaternion.x, qy: a.quaternion.y, qz: a.quaternion.z, qw: a.quaternion.w, slerpAmt: 0}, r = {px: t.x, py: t.y, pz: t.z, qx: e.x, qy: e.y, qz: e.z, qw: e.w, slerpAmt: 1}, h = () => {
        this.inTransit = true, this.packTransform(), this.dispatchEvent({type: "CameraMoveStart"});
      }, d = (t2) => {
        this.body.position.set(o.px, o.py, o.pz), n ? this.head.quaternion.slerp(e, o.slerpAmt) : this.head.quaternion.set(o.qx, o.qy, o.qz, o.qw), this.dispatchEvent({type: "CameraMoveUpdate", progress: t2.progress()});
      }, l = () => {
        this.inTransit = false, this.unpackTransform(), this.dispatchEvent({type: "CameraMoveEnd"});
      };
      TweenMaxWithCSS.to(o, Object.assign(Object.assign({duration: i, ease: s}, r), {onStart: h, onUpdate: function() {
        d(this);
      }, onComplete: l}));
    }
  }
  flyToKeyframe(t, e = 1, i = "power1") {
    if (this.hasAnimation && !this.isMoving()) {
      const s = {time: this.mixer.time}, n = {time: this.animationClip.tracks[0].times[t]}, a = () => {
        this.inTransit = true, this.dispatchEvent({type: "CameraMoveStart"});
      }, o = (t2) => {
        this.mixer.setTime(s.time), this.dispatchEvent({type: "CameraMoveUpdate", progress: t2.progress()});
      }, r = () => {
        this.inTransit = false, this.dispatchEvent({type: "CameraMoveEnd"});
      };
      TweenMaxWithCSS.to(s, Object.assign(Object.assign({duration: e, ease: i}, n), {onStart: a, onUpdate: function() {
        o(this);
      }, onComplete: r}));
    }
  }
  setAnimationPercentage(t) {
    if (this.hasAnimation) {
      const e = Math.max(0, Math.min(t * this.animationClip.duration, this.animationClip.duration - 1e-4));
      this.mixer.setTime(e);
    }
  }
  setAnimationTime(t) {
    this.hasAnimation && this.mixer.setTime(t);
  }
  setAnimationKeyframe(t) {
    this.hasAnimation && this.mixer.setTime(this.animationClip.tracks[0].times[t]);
  }
}
class x extends EventDispatcher {
  constructor() {
    super();
  }
}
const f$1 = {keyMapping: {forward: ["ArrowUp", "w", "W"], backward: ["ArrowDown", "s", "S"], left: ["ArrowLeft", "a", "A"], right: ["ArrowRight", "d", "D"], up: ["u", "U"], down: ["n", "N"]}, dampingFactor: 0.5, incrementor: 1, preventBubbling: true};
class E extends x {
  constructor(t) {
    super(), Object.assign(this, f$1, t);
    const e = {};
    for (const t2 in this.keyMapping)
      e[t2] = 0;
    this.damper = new p({values: e, dampingFactor: this.dampingFactor}), this.onKeyUp = this.onKeyUp.bind(this), this.onKeyDown = this.onKeyDown.bind(this);
  }
  connect() {
    document.addEventListener("keyup", this.onKeyUp, true), document.addEventListener("keydown", this.onKeyDown, true), this.connected = true;
  }
  disconnect() {
    document.removeEventListener("keyup", this.onKeyUp, true), document.removeEventListener("keydown", this.onKeyDown, true), this.connected = false;
  }
  update() {
    this.type !== "continuous" || this.damper.reachedTarget() || (this.damper.update(), this.dispatchEvent({type: "update", values: this.damper.getCurrentValues(), deltas: this.damper.getDeltaValues()}), this.damper.reachedTarget() && (this.damper.resetAll(0), this.dispatchEvent({type: "inertiacomplete"})));
  }
  isEnabled() {
    return this.connected;
  }
  onKeyUp(t) {
    if (this.type === "discrete") {
      for (const e in this.keyMapping)
        if (this.keyMapping[e].includes(t.key)) {
          this.preventBubbling && t.preventDefault(), this.dispatchEvent({type: "trigger", trigger: e});
          break;
        }
    }
  }
  onKeyDown(t) {
    if (this.type === "continuous") {
      for (const e in this.keyMapping)
        if (this.keyMapping[e].includes(t.key)) {
          this.preventBubbling && t.preventDefault(), this.damper.addToTarget(e, this.incrementor);
          break;
        }
    }
  }
}
const w = {domElement: document.body, dampingFactor: 0.5, shouldNormalize: true, normalizeAroundZero: true, multipointerThreshold: 100};
class P extends x {
  constructor(t) {
    super(), this.domElement = document.body, this.shouldNormalize = true, this.normalizeAroundZero = true, this.pointerCount = 0, this.recordedPosition = false, this.cache = [], this.lastDownTime = 0, this.lastUpTime = 0, Object.assign(this, w, t), this.damper = new p({values: {x: null, y: null}, dampingFactor: this.dampingFactor}), this.setDimensions(), this.onPointerMove = this.onPointerMove.bind(this), this.onPointerUp = this.onPointerUp.bind(this), this.onPointerDown = this.onPointerDown.bind(this), this.onResize = this.onResize.bind(this);
  }
  connect() {
    this.domElement.addEventListener("pointermove", this.onPointerMove, {passive: true}), this.domElement.addEventListener("pointerdown", this.onPointerDown, {passive: true}), this.domElement.addEventListener("pointerleave", this.onPointerUp, {passive: true}), this.domElement.addEventListener("pointerup", this.onPointerUp, {passive: true}), window.addEventListener("resize", this.onResize), this.connected = true;
  }
  disconnect() {
    this.domElement.removeEventListener("pointermove", this.onPointerMove), this.domElement.removeEventListener("pointerdown", this.onPointerDown), this.domElement.removeEventListener("pointerleave", this.onPointerUp), this.domElement.removeEventListener("pointerup", this.onPointerUp), this.connected = false;
  }
  update(t) {
    this.pointerCount !== this.cache.length && t - this.lastDownTime > this.multipointerThreshold && t - this.lastUpTime > this.multipointerThreshold && (this.pointerCount = this.cache.length, this.pointerCount === 0 ? (this.damper.resetAll(null), this.recordedPosition = false) : (this.damper.resetData(this.getPointerPosition(this.cache[0])), this.recordedPosition = true)), this.damper.reachedTarget() || (this.damper.update(), this.dispatchEvent({type: "update", values: this.shouldNormalize ? this.normalize(this.damper.getCurrentValues(), this.normalizeAroundZero) : this.damper.getCurrentValues(), deltas: this.shouldNormalize ? this.normalize(this.damper.getDeltaValues(), false) : this.damper.getDeltaValues(), pointerCount: this.pointerCount}), this.damper.reachedTarget() && this.dispatchEvent({type: "inertiacomplete"}));
  }
  isEnabled() {
    return this.connected;
  }
  setDimensions() {
    this.width = this.domElement.getBoundingClientRect().width, this.height = this.domElement.getBoundingClientRect().height;
  }
  getPointerPosition(t) {
    return {x: Math.max(0, Math.min(this.width, t.x - this.domElement.offsetLeft)), y: Math.max(0, Math.min(this.height, t.y - this.domElement.offsetTop))};
  }
  normalize(t, e) {
    let i = t.x / this.width, s = t.y / this.height;
    return e && (i = 2 * i - 1, s = 2 * s - 1), {x: i, y: s};
  }
  onPointerMove(t) {
    this.pointerCount === this.cache.length && (this.cache.length === 0 ? this.recordedPosition ? this.damper.setTarget(this.getPointerPosition(t)) : (this.damper.resetData(this.getPointerPosition(t)), this.recordedPosition = true) : t.pointerId === this.cache[0].pointerId && this.damper.setTarget(this.getPointerPosition(t)));
  }
  onPointerDown(t) {
    t.button === 0 && (this.cache.push(t), this.lastDownTime = window.performance.now());
  }
  onPointerUp(t) {
    if (t.button === 0 || t.type === "pointerleave") {
      for (let e = 0; e < this.cache.length; e++)
        if (this.cache[e].pointerId == t.pointerId) {
          this.cache.splice(e, 1);
          break;
        }
      this.lastUpTime = window.performance.now();
    }
  }
  onResize() {
    this.setDimensions();
  }
}
const S = {dampingFactor: 0.5, thresholdX: 15, thresholdY: 15, debounceDuration: 700};
class F extends x {
  constructor(t) {
    super(), this.lastThresholdTrigger = 0, Object.assign(this, S, t), this.damper = new p({values: {x: 0, y: 0}, dampingFactor: this.dampingFactor}), this.onWheel = this.onWheel.bind(this);
  }
  connect() {
    (this.domElement || window).addEventListener("wheel", this.onWheel, {passive: true}), this.connected = true;
  }
  disconnect() {
    (this.domElement || window).removeEventListener("wheel", this.onWheel), this.connected = false;
  }
  update() {
    this.type !== "continuous" || this.damper.reachedTarget() || (this.damper.update(), this.dispatchEvent({type: "update", values: this.damper.getCurrentValues(), deltas: this.damper.getDeltaValues()}), this.damper.reachedTarget() && (this.damper.resetAll(0), this.dispatchEvent({type: "inertiacomplete"})));
  }
  isEnabled() {
    return this.connected;
  }
  onWheel(t) {
    if (this.type === "continuous")
      this.damper.addToTarget("x", t.deltaX), this.damper.addToTarget("y", t.deltaY);
    else if (this.type === "discrete" && (Math.abs(t.deltaX) >= this.thresholdX || Math.abs(t.deltaY) >= this.thresholdY)) {
      const e = window.performance.now();
      e - this.lastThresholdTrigger > this.debounceDuration && (this.lastThresholdTrigger = e, this.dispatchEvent({type: "trigger", x: Math.abs(t.deltaX) >= this.thresholdX ? Math.sign(t.deltaX) : 0, y: Math.abs(t.deltaY) >= this.thresholdY ? Math.sign(t.deltaY) : 0}));
    }
  }
}
const R = {domElement: document.body, pointerDampFactor: 0.3, pointerScaleFactor: 4, keyboardDampFactor: 0.5, keyboardScaleFactor: 0.5, wheelDampFactor: 0.25, wheelScaleFactor: 0.05, panDegreeFactor: Math.PI / 4, tiltDegreeFactor: Math.PI / 10};
class k {
  constructor(t, e = {}) {
    this.enabled = false, this.cameraRig = t, this.wheelScaleFactor = e.wheelScaleFactor || R.wheelScaleFactor, this.pointerScaleFactor = e.pointerScaleFactor || R.pointerScaleFactor, this.panDegreeFactor = e.panDegreeFactor || R.panDegreeFactor, this.tiltDegreeFactor = e.tiltDegreeFactor || R.tiltDegreeFactor, this.keyboardAdaptor = new E({type: "continuous", dampingFactor: e.keyboardDampFactor || R.keyboardDampFactor, incrementor: e.keyboardScaleFactor || R.keyboardScaleFactor}), this.wheelAdaptor = new F({type: "continuous", dampingFactor: e.wheelDampFactor || R.wheelDampFactor, domElement: e.domElement || R.domElement}), this.pointerAdaptor = new P({domElement: e.domElement || R.domElement, dampingFactor: e.pointerDampFactor || R.pointerDampFactor}), this.onWheel = this.onWheel.bind(this), this.onKey = this.onKey.bind(this), this.onPointer = this.onPointer.bind(this);
  }
  isEnabled() {
    return this.enabled;
  }
  enable() {
    this.wheelAdaptor.connect(), this.keyboardAdaptor.connect(), this.pointerAdaptor.connect(), this.wheelAdaptor.addEventListener("update", this.onWheel), this.keyboardAdaptor.addEventListener("update", this.onKey), this.pointerAdaptor.addEventListener("update", this.onPointer), this.enabled = true;
  }
  disable() {
    this.wheelAdaptor.disconnect(), this.keyboardAdaptor.disconnect(), this.pointerAdaptor.disconnect(), this.wheelAdaptor.removeEventListener("update", this.onWheel), this.keyboardAdaptor.removeEventListener("update", this.onKey), this.pointerAdaptor.removeEventListener("update", this.onPointer), this.enabled = false;
  }
  onWheel(t) {
    this.cameraRig.do(m.Dolly, t.deltas.y * this.wheelScaleFactor), this.cameraRig.do(m.Truck, t.deltas.x * this.wheelScaleFactor);
  }
  onKey(t) {
    this.cameraRig.do(m.Dolly, t.values.backward - t.values.forward), this.cameraRig.do(m.Truck, t.values.right - t.values.left), this.cameraRig.do(m.Pedestal, t.values.up - t.values.down);
  }
  onPointer(t) {
    switch (t.pointerCount) {
      case 1:
        this.cameraRig.do(m.Pan, t.deltas.x * this.panDegreeFactor), this.cameraRig.do(m.Tilt, t.deltas.y * this.tiltDegreeFactor);
        break;
      case 2:
        this.cameraRig.do(m.Dolly, -t.deltas.y * this.pointerScaleFactor), this.cameraRig.do(m.Truck, -t.deltas.x * this.pointerScaleFactor);
    }
  }
  update(t) {
    this.enabled && (this.keyboardAdaptor.update(), this.wheelAdaptor.update(), this.pointerAdaptor.update(t));
  }
}
!function(t, e) {
  e === void 0 && (e = {});
  var i = e.insertAt;
  if (t && typeof document != "undefined") {
    var s = document.head || document.getElementsByTagName("head")[0], n = document.createElement("style");
    n.type = "text/css", i === "top" && s.firstChild ? s.insertBefore(n, s.firstChild) : s.appendChild(n), n.styleSheet ? n.styleSheet.cssText = t : n.appendChild(document.createTextNode(t));
  }
}(".tb-ch {\n  width: 350px;\n  height: 100%;\n  position: fixed;\n  top: 0;\n  left: 0;\n  z-index: 99999;\n  background-color: rgba(255, 255, 255, 0.8);\n  box-sizing: border-box;\n  overflow-x: visible;\n  transition: all 0.2s ease-in-out;\n}\n  .tb-ch.collapsed {\n    left: -350px;\n  }\n  .tb-ch * {\n    box-sizing: border-box;\n  }\n  .tb-ch button {\n    text-transform: capitalize;\n    cursor: pointer;\n  }\n  .tb-ch .btn-round {\n    font-size: 1.8rem;\n    line-height: 1;\n    width: 2.5rem;\n    height: 2.5rem;\n    position: absolute;\n    right: -3rem;\n    bottom: 0.5rem;\n  }\n  .tb-ch .btn-round.collapse {\n      bottom: 3.5rem;\n    }\n  .tb-ch .controls {\n    position: absolute;\n    bottom: 0;\n    height: 185px;\n    border-top: 1px solid black;\n    padding: 0.5rem;\n    width: 100%;\n    display: flex;\n    flex-direction: column;\n    justify-content: space-between;\n  }\n  .tb-ch .btn-text {\n    padding: 0.5rem;\n    text-align: center;\n    width: 100%;\n  }\n  .tb-ch input[type='range'] {\n    width: 100%;\n  }\n  .tb-ch .pois {\n    height: calc(100vh - 185px - 1rem);\n    overflow: scroll;\n    padding: 1rem 1rem 0;\n  }\n  .tb-ch .poi {\n    margin-bottom: 1rem;\n  }\n  .tb-ch .poi h2 {\n      font-size: 1rem;\n    }\n  .tb-ch .poi .wrapper {\n      display: flex;\n      flex-direction: row;\n    }\n  .tb-ch .poi img {\n      display: block;\n      max-width: 100%;\n      min-width: 0;\n      margin-right: 0.5rem;\n    }\n  .tb-ch .poi .poi-controls {\n      display: flex;\n      flex-direction: column;\n    }\n  .tb-ch .poi .poi-controls button {\n        padding: 0.5rem;\n        width: 2rem;\n        height: 2rem;\n        margin-bottom: 0.25rem;\n      }\n  .tb-ch .poi .poi-params {\n      display: flex;\n      flex-direction: row;\n      flex-wrap: wrap;\n      width: calc(100% - 2.5rem);\n    }\n  .tb-ch .poi label,\n    .tb-ch .poi input,\n    .tb-ch .poi select {\n      width: 50%;\n      font-size: 0.7rem;\n      font-family: monospace;\n      margin: 0.25rem 0;\n    }\n  .tb-ch .poi input {\n      text-align: center;\n    }\n");

var Stats$2 = function () {

	var mode = 0;

	var container = document.createElement( 'div' );
	container.style.cssText = 'position:fixed;top:0;left:0;cursor:pointer;opacity:0.9;z-index:10000';
	container.addEventListener( 'click', function ( event ) {

		event.preventDefault();
		showPanel( ++ mode % container.children.length );

	}, false );

	//

	function addPanel( panel ) {

		container.appendChild( panel.dom );
		return panel;

	}

	function showPanel( id ) {

		for ( var i = 0; i < container.children.length; i ++ ) {

			container.children[ i ].style.display = i === id ? 'block' : 'none';

		}

		mode = id;

	}

	//

	var beginTime = ( performance || Date ).now(), prevTime = beginTime, frames = 0;

	var fpsPanel = addPanel( new Stats$2.Panel( 'FPS', '#0ff', '#002' ) );
	var msPanel = addPanel( new Stats$2.Panel( 'MS', '#0f0', '#020' ) );

	if ( self.performance && self.performance.memory ) {

		var memPanel = addPanel( new Stats$2.Panel( 'MB', '#f08', '#201' ) );

	}

	showPanel( 0 );

	return {

		REVISION: 16,

		dom: container,

		addPanel: addPanel,
		showPanel: showPanel,

		begin: function () {

			beginTime = ( performance || Date ).now();

		},

		end: function () {

			frames ++;

			var time = ( performance || Date ).now();

			msPanel.update( time - beginTime, 200 );

			if ( time >= prevTime + 1000 ) {

				fpsPanel.update( ( frames * 1000 ) / ( time - prevTime ), 100 );

				prevTime = time;
				frames = 0;

				if ( memPanel ) {

					var memory = performance.memory;
					memPanel.update( memory.usedJSHeapSize / 1048576, memory.jsHeapSizeLimit / 1048576 );

				}

			}

			return time;

		},

		update: function () {

			beginTime = this.end();

		},

		// Backwards Compatibility

		domElement: container,
		setMode: showPanel

	};

};

Stats$2.Panel = function ( name, fg, bg ) {

	var min = Infinity, max = 0, round = Math.round;
	var PR = round( window.devicePixelRatio || 1 );

	var WIDTH = 80 * PR, HEIGHT = 48 * PR,
		TEXT_X = 3 * PR, TEXT_Y = 2 * PR,
		GRAPH_X = 3 * PR, GRAPH_Y = 15 * PR,
		GRAPH_WIDTH = 74 * PR, GRAPH_HEIGHT = 30 * PR;

	var canvas = document.createElement( 'canvas' );
	canvas.width = WIDTH;
	canvas.height = HEIGHT;
	canvas.style.cssText = 'width:80px;height:48px';

	var context = canvas.getContext( '2d' );
	context.font = 'bold ' + ( 9 * PR ) + 'px Helvetica,Arial,sans-serif';
	context.textBaseline = 'top';

	context.fillStyle = bg;
	context.fillRect( 0, 0, WIDTH, HEIGHT );

	context.fillStyle = fg;
	context.fillText( name, TEXT_X, TEXT_Y );
	context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );

	context.fillStyle = bg;
	context.globalAlpha = 0.9;
	context.fillRect( GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT );

	return {

		dom: canvas,

		update: function ( value, maxValue ) {

			min = Math.min( min, value );
			max = Math.max( max, value );

			context.fillStyle = bg;
			context.globalAlpha = 1;
			context.fillRect( 0, 0, WIDTH, GRAPH_Y );
			context.fillStyle = fg;
			context.fillText( round( value ) + ' ' + name + ' (' + round( min ) + '-' + round( max ) + ')', TEXT_X, TEXT_Y );

			context.drawImage( canvas, GRAPH_X + PR, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT, GRAPH_X, GRAPH_Y, GRAPH_WIDTH - PR, GRAPH_HEIGHT );

			context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, GRAPH_HEIGHT );

			context.fillStyle = bg;
			context.globalAlpha = 0.9;
			context.fillRect( GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, round( ( 1 - ( value / maxValue ) ) * GRAPH_HEIGHT ) );

		}

	};

};

function _defineProperty$2(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}
function defaultSetTimout() {
  throw new Error("setTimeout has not been defined");
}
function defaultClearTimeout() {
  throw new Error("clearTimeout has not been defined");
}
var cachedSetTimeout = defaultSetTimout;
var cachedClearTimeout = defaultClearTimeout;
var globalContext;
if (typeof window !== "undefined") {
  globalContext = window;
} else if (typeof self !== "undefined") {
  globalContext = self;
} else {
  globalContext = {};
}
if (typeof globalContext.setTimeout === "function") {
  cachedSetTimeout = setTimeout;
}
if (typeof globalContext.clearTimeout === "function") {
  cachedClearTimeout = clearTimeout;
}
function runTimeout(fun) {
  if (cachedSetTimeout === setTimeout) {
    return setTimeout(fun, 0);
  }
  if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
    cachedSetTimeout = setTimeout;
    return setTimeout(fun, 0);
  }
  try {
    return cachedSetTimeout(fun, 0);
  } catch (e) {
    try {
      return cachedSetTimeout.call(null, fun, 0);
    } catch (e2) {
      return cachedSetTimeout.call(this, fun, 0);
    }
  }
}
function runClearTimeout(marker) {
  if (cachedClearTimeout === clearTimeout) {
    return clearTimeout(marker);
  }
  if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
    cachedClearTimeout = clearTimeout;
    return clearTimeout(marker);
  }
  try {
    return cachedClearTimeout(marker);
  } catch (e) {
    try {
      return cachedClearTimeout.call(null, marker);
    } catch (e2) {
      return cachedClearTimeout.call(this, marker);
    }
  }
}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;
function cleanUpNextTick() {
  if (!draining || !currentQueue) {
    return;
  }
  draining = false;
  if (currentQueue.length) {
    queue = currentQueue.concat(queue);
  } else {
    queueIndex = -1;
  }
  if (queue.length) {
    drainQueue();
  }
}
function drainQueue() {
  if (draining) {
    return;
  }
  var timeout = runTimeout(cleanUpNextTick);
  draining = true;
  var len = queue.length;
  while (len) {
    currentQueue = queue;
    queue = [];
    while (++queueIndex < len) {
      if (currentQueue) {
        currentQueue[queueIndex].run();
      }
    }
    queueIndex = -1;
    len = queue.length;
  }
  currentQueue = null;
  draining = false;
  runClearTimeout(timeout);
}
function nextTick(fun) {
  var args = new Array(arguments.length - 1);
  if (arguments.length > 1) {
    for (var i = 1; i < arguments.length; i++) {
      args[i - 1] = arguments[i];
    }
  }
  queue.push(new Item(fun, args));
  if (queue.length === 1 && !draining) {
    runTimeout(drainQueue);
  }
}
function Item(fun, array) {
  this.fun = fun;
  this.array = array;
}
Item.prototype.run = function() {
  this.fun.apply(null, this.array);
};
var title = "browser";
var platform = "browser";
var browser = true;
var argv = [];
var version = "";
var versions = {};
var release = {};
var config$1 = {};
function noop$1() {
}
var on = noop$1;
var addListener = noop$1;
var once = noop$1;
var off = noop$1;
var removeListener = noop$1;
var removeAllListeners = noop$1;
var emit = noop$1;
function binding(name) {
  throw new Error("process.binding is not supported");
}
function cwd() {
  return "/";
}
function chdir(dir) {
  throw new Error("process.chdir is not supported");
}
function umask() {
  return 0;
}
var performance$1 = globalContext.performance || {};
var performanceNow = performance$1.now || performance$1.mozNow || performance$1.msNow || performance$1.oNow || performance$1.webkitNow || function() {
  return new Date().getTime();
};
function hrtime(previousTimestamp) {
  var clocktime = performanceNow.call(performance$1) * 1e-3;
  var seconds = Math.floor(clocktime);
  var nanoseconds = Math.floor(clocktime % 1 * 1e9);
  if (previousTimestamp) {
    seconds = seconds - previousTimestamp[0];
    nanoseconds = nanoseconds - previousTimestamp[1];
    if (nanoseconds < 0) {
      seconds--;
      nanoseconds += 1e9;
    }
  }
  return [seconds, nanoseconds];
}
var startTime = new Date();
function uptime() {
  var currentTime = new Date();
  var dif = currentTime - startTime;
  return dif / 1e3;
}
var process$1 = {
  nextTick,
  title,
  browser,
  env: {NODE_ENV: "production"},
  argv,
  version,
  versions,
  on,
  addListener,
  once,
  off,
  removeListener,
  removeAllListeners,
  emit,
  binding,
  cwd,
  chdir,
  umask,
  hrtime,
  platform,
  release,
  config: config$1,
  uptime
};
function getHiResTimestamp$2() {
  let timestamp;
  if (typeof window !== "undefined" && window.performance) {
    timestamp = window.performance.now();
  } else if (typeof process$1 !== "undefined" && process$1.hrtime) {
    const timeParts = process$1.hrtime();
    timestamp = timeParts[0] * 1e3 + timeParts[1] / 1e6;
  } else {
    timestamp = Date.now();
  }
  return timestamp;
}
class Stat$1 {
  constructor(name, type) {
    _defineProperty$2(this, "name", void 0);
    _defineProperty$2(this, "type", void 0);
    _defineProperty$2(this, "sampleSize", 1);
    _defineProperty$2(this, "time", void 0);
    _defineProperty$2(this, "count", void 0);
    _defineProperty$2(this, "samples", void 0);
    _defineProperty$2(this, "lastTiming", void 0);
    _defineProperty$2(this, "lastSampleTime", void 0);
    _defineProperty$2(this, "lastSampleCount", void 0);
    _defineProperty$2(this, "_count", 0);
    _defineProperty$2(this, "_time", 0);
    _defineProperty$2(this, "_samples", 0);
    _defineProperty$2(this, "_startTime", 0);
    _defineProperty$2(this, "_timerPending", false);
    this.name = name;
    this.type = type;
    this.reset();
  }
  setSampleSize(samples) {
    this.sampleSize = samples;
    return this;
  }
  incrementCount() {
    this.addCount(1);
    return this;
  }
  decrementCount() {
    this.subtractCount(1);
    return this;
  }
  addCount(value) {
    this._count += value;
    this._samples++;
    this._checkSampling();
    return this;
  }
  subtractCount(value) {
    this._count -= value;
    this._samples++;
    this._checkSampling();
    return this;
  }
  addTime(time) {
    this._time += time;
    this.lastTiming = time;
    this._samples++;
    this._checkSampling();
    return this;
  }
  timeStart() {
    this._startTime = getHiResTimestamp$2();
    this._timerPending = true;
    return this;
  }
  timeEnd() {
    if (!this._timerPending) {
      return this;
    }
    this.addTime(getHiResTimestamp$2() - this._startTime);
    this._timerPending = false;
    this._checkSampling();
    return this;
  }
  getSampleAverageCount() {
    return this.sampleSize > 0 ? this.lastSampleCount / this.sampleSize : 0;
  }
  getSampleAverageTime() {
    return this.sampleSize > 0 ? this.lastSampleTime / this.sampleSize : 0;
  }
  getSampleHz() {
    return this.lastSampleTime > 0 ? this.sampleSize / (this.lastSampleTime / 1e3) : 0;
  }
  getAverageCount() {
    return this.samples > 0 ? this.count / this.samples : 0;
  }
  getAverageTime() {
    return this.samples > 0 ? this.time / this.samples : 0;
  }
  getHz() {
    return this.time > 0 ? this.samples / (this.time / 1e3) : 0;
  }
  reset() {
    this.time = 0;
    this.count = 0;
    this.samples = 0;
    this.lastTiming = 0;
    this.lastSampleTime = 0;
    this.lastSampleCount = 0;
    this._count = 0;
    this._time = 0;
    this._samples = 0;
    this._startTime = 0;
    this._timerPending = false;
    return this;
  }
  _checkSampling() {
    if (this._samples === this.sampleSize) {
      this.lastSampleTime = this._time;
      this.lastSampleCount = this._count;
      this.count += this._count;
      this.time += this._time;
      this.samples += this._samples;
      this._time = 0;
      this._count = 0;
      this._samples = 0;
    }
  }
}
class Stats$1 {
  constructor(options) {
    _defineProperty$2(this, "id", void 0);
    _defineProperty$2(this, "stats", {});
    this.id = options.id;
    this.stats = {};
    this._initializeStats(options.stats);
    Object.seal(this);
  }
  get(name, type = "count") {
    return this._getOrCreate({
      name,
      type
    });
  }
  get size() {
    return Object.keys(this.stats).length;
  }
  reset() {
    for (const key in this.stats) {
      this.stats[key].reset();
    }
    return this;
  }
  forEach(fn) {
    for (const key in this.stats) {
      fn(this.stats[key]);
    }
  }
  getTable() {
    const table = {};
    this.forEach((stat) => {
      table[stat.name] = {
        time: stat.time || 0,
        count: stat.count || 0,
        average: stat.getAverageTime() || 0,
        hz: stat.getHz() || 0
      };
    });
    return table;
  }
  _initializeStats(stats = []) {
    stats.forEach((stat) => this._getOrCreate(stat));
  }
  _getOrCreate(stat) {
    if (!stat || !stat.name) {
      return null;
    }
    const {
      name,
      type
    } = stat;
    if (!this.stats[name]) {
      if (stat instanceof Stat$1) {
        this.stats[name] = stat;
      } else {
        this.stats[name] = new Stat$1(name, type);
      }
    }
    return this.stats[name];
  }
}

function _defineProperty$1(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}
const KB = 1024;
const MB = 1024 * KB;
const GB = 1024 * MB;
function formatTime$1(t) {
  let value;
  let unit;
  let precision;
  if (t < 1) {
    value = t * 1e3;
    unit = "\u03BCs";
    precision = 0;
  } else if (t < 1e3) {
    value = t;
    unit = "ms";
    precision = 2;
  } else {
    value = t / 1e3;
    unit = "s";
    precision = 2;
  }
  return "".concat(value.toFixed(precision)).concat(unit);
}
function formatMemory(b) {
  let value;
  let unit;
  let precision;
  if (b < KB) {
    value = b;
    unit = " bytes";
    precision = 0;
  } else if (b < MB) {
    value = b / KB;
    unit = "kB";
    precision = 2;
  } else if (b < GB) {
    value = b / MB;
    unit = "MB";
    precision = 2;
  } else {
    value = b / GB;
    unit = "GB";
    precision = 2;
  }
  return "".concat(value.toFixed(precision)).concat(unit);
}
const RIGHT_ARROW = "\u25B6";
const DOWN_ARROW = "\u2B07";
const DEFAULT_CSS = {
  css: {
    position: "fixed",
    zIndex: 1e4,
    color: "#ccc",
    background: "#000",
    fontFamily: "Helvetica,Arial,sans-serif",
    padding: "8px",
    fontSize: "12px",
    lineSpacing: 6
  },
  headerCSS: {
    fontSize: "16px",
    cursor: "pointer"
  },
  itemCSS: {
    paddingLeft: "8px"
  }
};
const DEFAULT_FORMATTERS = {
  count: (stat) => "".concat(stat.name, ": ").concat(stat.count),
  averageTime: (stat) => "".concat(stat.name, ": ").concat(formatTime$1(stat.getAverageTime())),
  totalTime: (stat) => "".concat(stat.name, ": ").concat(formatTime$1(stat.time)),
  fps: (stat) => "".concat(stat.name, ": ").concat(Math.round(stat.getHz()), "fps"),
  memory: (stat) => "".concat(stat.name, ": ").concat(formatMemory(stat.count))
};
class StatsWidget {
  constructor(stats2, options) {
    _defineProperty$1(this, "stats", void 0);
    _defineProperty$1(this, "title", void 0);
    _defineProperty$1(this, "collapsed", false);
    _defineProperty$1(this, "_framesPerUpdate", void 0);
    _defineProperty$1(this, "_formatters", DEFAULT_FORMATTERS);
    _defineProperty$1(this, "_css", void 0);
    _defineProperty$1(this, "_headerCSS", void 0);
    _defineProperty$1(this, "_itemCSS", void 0);
    _defineProperty$1(this, "_container", null);
    _defineProperty$1(this, "_innerContainer", null);
    _defineProperty$1(this, "_statsContainer", null);
    _defineProperty$1(this, "_header", null);
    _defineProperty$1(this, "_resetOnUpdate", {});
    _defineProperty$1(this, "_counter", 0);
    _defineProperty$1(this, "_items", {});
    _defineProperty$1(this, "_added", false);
    this.stats = stats2;
    this.title = options === null || options === void 0 ? void 0 : options.title;
    this._framesPerUpdate = Math.round(Math.max((options === null || options === void 0 ? void 0 : options.framesPerUpdate) || 1, 1));
    this._initializeFormatters(options);
    this._initializeUpdateConfigs(options);
    this._css = Object.assign({}, DEFAULT_CSS.css, options === null || options === void 0 ? void 0 : options.css);
    this._headerCSS = Object.assign({}, DEFAULT_CSS.headerCSS, this._css.header);
    this._itemCSS = Object.assign({}, DEFAULT_CSS.itemCSS, this._css.item);
    delete this._css.header;
    delete this._css.item;
    this._createDOM(options === null || options === void 0 ? void 0 : options.container);
    this._createDOMStats();
  }
  setStats(stats2) {
    this.stats = stats2;
    this._createDOMStats();
    this._setHeaderContent();
    this.update();
  }
  update() {
    const stats2 = this.stats && this.stats.stats;
    if (!stats2 || Object.keys(stats2).length === 0) {
      return;
    }
    if (this._counter++ % this._framesPerUpdate !== 0) {
      return;
    }
    this._update();
  }
  remove() {
    this._container.removeChild(this._innerContainer);
  }
  setCollapsed(collapsed) {
    this.collapsed = collapsed;
    if (this._statsContainer) {
      this._statsContainer.style.display = this.collapsed ? "none" : "block";
    }
    this._setHeaderContent();
  }
  _update() {
    this.stats.forEach((stat) => {
      this._createDOMItem(stat.name);
      this._items[stat.name].innerHTML = this._getLines(stat).join("<BR>");
      if (this._resetOnUpdate[stat.name]) {
        stat.reset();
      }
    });
  }
  _initializeFormatters(options) {
    if (options !== null && options !== void 0 && options.formatters) {
      for (const name in options.formatters) {
        let formatter = options.formatters[name];
        if (typeof formatter === "string") {
          formatter = DEFAULT_FORMATTERS[formatter];
        }
        this._formatters[name] = formatter;
      }
    }
  }
  _initializeUpdateConfigs(options) {
    if (options !== null && options !== void 0 && options.resetOnUpdate) {
      for (const name in options.resetOnUpdate) {
        this._resetOnUpdate[name] = options.resetOnUpdate[name];
      }
    }
  }
  _createDOM(container) {
    if (typeof document === "undefined" || !document) {
      return;
    }
    this._container = container;
    if (!this._container) {
      this._container = document.createElement("div");
      for (const name in this._css) {
        this._container.style[name] = this._css[name];
      }
      document.body.appendChild(this._container);
    }
    this._innerContainer = document.createElement("div");
    this._container.appendChild(this._innerContainer);
    this._createDOMHeader();
    this._statsContainer = document.createElement("div");
    this._statsContainer.style.display = "block";
    this._innerContainer.appendChild(this._statsContainer);
  }
  _createDOMHeader() {
    if (!this._header) {
      this._header = document.createElement("div");
      for (const name in this._headerCSS) {
        this._header.style[name] = this._headerCSS[name];
      }
      this._header.onclick = this._toggleCollapsed.bind(this);
      this._innerContainer.appendChild(this._header);
    }
    this._setHeaderContent();
  }
  _setHeaderContent() {
    if (this._header) {
      const collapsedState = this.collapsed ? RIGHT_ARROW : DOWN_ARROW;
      const title = this.title || this.stats && this.stats.id || "Stats";
      this._header.innerText = "".concat(collapsedState, " ").concat(title);
    }
  }
  _toggleCollapsed() {
    this.setCollapsed(!this.collapsed);
  }
  _createDOMStats() {
    if (this.stats instanceof Stats$1) {
      this.stats.forEach((stat) => {
        this._createDOMItem(stat.name);
      });
    }
  }
  _createDOMItem(statName) {
    if (!this._statsContainer) {
      return;
    }
    if (this._items[statName]) {
      return;
    }
    this._items[statName] = document.createElement("div");
    for (const name in this._itemCSS) {
      this._items[statName].style[name] = this._itemCSS[name];
    }
    this._statsContainer.appendChild(this._items[statName]);
  }
  _getLines(stat) {
    const formatter = this._formatters[stat.name] || this._formatters[stat.type] || DEFAULT_FORMATTERS.count;
    return formatter(this.stats.get(stat.name)).split("\n");
  }
}

function assert$7(condition, message) {
  if (!condition) {
    throw new Error(message || 'loader assertion failed.');
  }
}

const isBrowser$2 = Boolean(typeof process !== 'object' || String(process) !== '[object process]' || process.browser);
const matches$1 = typeof process !== 'undefined' && process.version && /v([0-9]*)/.exec(process.version);
matches$1 && parseFloat(matches$1[1]) || 0;

const VERSION$8 = "3.2.12" ;

function assert$6(condition, message) {
  if (!condition) {
    throw new Error(message || 'loaders.gl assertion failed.');
  }
}

const globals$1 = {
  self: typeof self !== 'undefined' && self,
  window: typeof window !== 'undefined' && window,
  global: typeof global !== 'undefined' && global,
  document: typeof document !== 'undefined' && document
};
const global_ = globals$1.global || globals$1.self || globals$1.window || {};
const isBrowser$1 = typeof process !== 'object' || String(process) !== '[object process]' || process.browser;
const isWorker = typeof importScripts === 'function';
const isMobile = typeof window !== 'undefined' && typeof window.orientation !== 'undefined';
const matches = typeof process !== 'undefined' && process.version && /v([0-9]*)/.exec(process.version);
matches && parseFloat(matches[1]) || 0;

function _typeof(obj) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  }, _typeof(obj);
}

function _toPrimitive(input, hint) {
  if (_typeof(input) !== "object" || input === null) return input;
  var prim = input[Symbol.toPrimitive];
  if (prim !== undefined) {
    var res = prim.call(input, hint || "default");
    if (_typeof(res) !== "object") return res;
    throw new TypeError("@@toPrimitive must return a primitive value.");
  }
  return (hint === "string" ? String : Number)(input);
}

function _toPropertyKey(arg) {
  var key = _toPrimitive(arg, "string");
  return _typeof(key) === "symbol" ? key : String(key);
}

function _defineProperty(obj, key, value) {
  key = _toPropertyKey(key);
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}

class WorkerJob {
  constructor(jobName, workerThread) {
    _defineProperty(this, "name", void 0);

    _defineProperty(this, "workerThread", void 0);

    _defineProperty(this, "isRunning", true);

    _defineProperty(this, "result", void 0);

    _defineProperty(this, "_resolve", () => {});

    _defineProperty(this, "_reject", () => {});

    this.name = jobName;
    this.workerThread = workerThread;
    this.result = new Promise((resolve, reject) => {
      this._resolve = resolve;
      this._reject = reject;
    });
  }

  postMessage(type, payload) {
    this.workerThread.postMessage({
      source: 'loaders.gl',
      type,
      payload
    });
  }

  done(value) {
    assert$6(this.isRunning);
    this.isRunning = false;

    this._resolve(value);
  }

  error(error) {
    assert$6(this.isRunning);
    this.isRunning = false;

    this._reject(error);
  }

}

class Worker$1 {}

const workerURLCache = new Map();
function getLoadableWorkerURL(props) {
  assert$6(props.source && !props.url || !props.source && props.url);
  let workerURL = workerURLCache.get(props.source || props.url);

  if (!workerURL) {
    if (props.url) {
      workerURL = getLoadableWorkerURLFromURL(props.url);
      workerURLCache.set(props.url, workerURL);
    }

    if (props.source) {
      workerURL = getLoadableWorkerURLFromSource(props.source);
      workerURLCache.set(props.source, workerURL);
    }
  }

  assert$6(workerURL);
  return workerURL;
}

function getLoadableWorkerURLFromURL(url) {
  if (!url.startsWith('http')) {
    return url;
  }

  const workerSource = buildScriptSource(url);
  return getLoadableWorkerURLFromSource(workerSource);
}

function getLoadableWorkerURLFromSource(workerSource) {
  const blob = new Blob([workerSource], {
    type: 'application/javascript'
  });
  return URL.createObjectURL(blob);
}

function buildScriptSource(workerUrl) {
  return "try {\n  importScripts('".concat(workerUrl, "');\n} catch (error) {\n  console.error(error);\n  throw error;\n}");
}

function getTransferList(object, recursive = true, transfers) {
  const transfersSet = transfers || new Set();

  if (!object) ; else if (isTransferable(object)) {
    transfersSet.add(object);
  } else if (isTransferable(object.buffer)) {
    transfersSet.add(object.buffer);
  } else if (ArrayBuffer.isView(object)) ; else if (recursive && typeof object === 'object') {
    for (const key in object) {
      getTransferList(object[key], recursive, transfersSet);
    }
  }

  return transfers === undefined ? Array.from(transfersSet) : [];
}

function isTransferable(object) {
  if (!object) {
    return false;
  }

  if (object instanceof ArrayBuffer) {
    return true;
  }

  if (typeof MessagePort !== 'undefined' && object instanceof MessagePort) {
    return true;
  }

  if (typeof ImageBitmap !== 'undefined' && object instanceof ImageBitmap) {
    return true;
  }

  if (typeof OffscreenCanvas !== 'undefined' && object instanceof OffscreenCanvas) {
    return true;
  }

  return false;
}

const NOOP = () => {};

class WorkerThread {
  static isSupported() {
    return typeof Worker !== 'undefined' && isBrowser$1 || typeof Worker$1 !== 'undefined' && !isBrowser$1;
  }

  constructor(props) {
    _defineProperty(this, "name", void 0);

    _defineProperty(this, "source", void 0);

    _defineProperty(this, "url", void 0);

    _defineProperty(this, "terminated", false);

    _defineProperty(this, "worker", void 0);

    _defineProperty(this, "onMessage", void 0);

    _defineProperty(this, "onError", void 0);

    _defineProperty(this, "_loadableURL", '');

    const {
      name,
      source,
      url
    } = props;
    assert$6(source || url);
    this.name = name;
    this.source = source;
    this.url = url;
    this.onMessage = NOOP;

    this.onError = error => console.log(error);

    this.worker = isBrowser$1 ? this._createBrowserWorker() : this._createNodeWorker();
  }

  destroy() {
    this.onMessage = NOOP;
    this.onError = NOOP;
    this.worker.terminate();
    this.terminated = true;
  }

  get isRunning() {
    return Boolean(this.onMessage);
  }

  postMessage(data, transferList) {
    transferList = transferList || getTransferList(data);
    this.worker.postMessage(data, transferList);
  }

  _getErrorFromErrorEvent(event) {
    let message = 'Failed to load ';
    message += "worker ".concat(this.name, " from ").concat(this.url, ". ");

    if (event.message) {
      message += "".concat(event.message, " in ");
    }

    if (event.lineno) {
      message += ":".concat(event.lineno, ":").concat(event.colno);
    }

    return new Error(message);
  }

  _createBrowserWorker() {
    this._loadableURL = getLoadableWorkerURL({
      source: this.source,
      url: this.url
    });
    const worker = new Worker(this._loadableURL, {
      name: this.name
    });

    worker.onmessage = event => {
      if (!event.data) {
        this.onError(new Error('No data received'));
      } else {
        this.onMessage(event.data);
      }
    };

    worker.onerror = error => {
      this.onError(this._getErrorFromErrorEvent(error));
      this.terminated = true;
    };

    worker.onmessageerror = event => console.error(event);

    return worker;
  }

  _createNodeWorker() {
    let worker;

    if (this.url) {
      const absolute = this.url.includes(':/') || this.url.startsWith('/');
      const url = absolute ? this.url : "./".concat(this.url);
      worker = new Worker$1(url, {
        eval: false
      });
    } else if (this.source) {
      worker = new Worker$1(this.source, {
        eval: true
      });
    } else {
      throw new Error('no worker');
    }

    worker.on('message', data => {
      this.onMessage(data);
    });
    worker.on('error', error => {
      this.onError(error);
    });
    worker.on('exit', code => {});
    return worker;
  }

}

class WorkerPool$1 {
  static isSupported() {
    return WorkerThread.isSupported();
  }

  constructor(props) {
    _defineProperty(this, "name", 'unnamed');

    _defineProperty(this, "source", void 0);

    _defineProperty(this, "url", void 0);

    _defineProperty(this, "maxConcurrency", 1);

    _defineProperty(this, "maxMobileConcurrency", 1);

    _defineProperty(this, "onDebug", () => {});

    _defineProperty(this, "reuseWorkers", true);

    _defineProperty(this, "props", {});

    _defineProperty(this, "jobQueue", []);

    _defineProperty(this, "idleQueue", []);

    _defineProperty(this, "count", 0);

    _defineProperty(this, "isDestroyed", false);

    this.source = props.source;
    this.url = props.url;
    this.setProps(props);
  }

  destroy() {
    this.idleQueue.forEach(worker => worker.destroy());
    this.isDestroyed = true;
  }

  setProps(props) {
    this.props = { ...this.props,
      ...props
    };

    if (props.name !== undefined) {
      this.name = props.name;
    }

    if (props.maxConcurrency !== undefined) {
      this.maxConcurrency = props.maxConcurrency;
    }

    if (props.maxMobileConcurrency !== undefined) {
      this.maxMobileConcurrency = props.maxMobileConcurrency;
    }

    if (props.reuseWorkers !== undefined) {
      this.reuseWorkers = props.reuseWorkers;
    }

    if (props.onDebug !== undefined) {
      this.onDebug = props.onDebug;
    }
  }

  async startJob(name, onMessage = (job, type, data) => job.done(data), onError = (job, error) => job.error(error)) {
    const startPromise = new Promise(onStart => {
      this.jobQueue.push({
        name,
        onMessage,
        onError,
        onStart
      });
      return this;
    });

    this._startQueuedJob();

    return await startPromise;
  }

  async _startQueuedJob() {
    if (!this.jobQueue.length) {
      return;
    }

    const workerThread = this._getAvailableWorker();

    if (!workerThread) {
      return;
    }

    const queuedJob = this.jobQueue.shift();

    if (queuedJob) {
      this.onDebug({
        message: 'Starting job',
        name: queuedJob.name,
        workerThread,
        backlog: this.jobQueue.length
      });
      const job = new WorkerJob(queuedJob.name, workerThread);

      workerThread.onMessage = data => queuedJob.onMessage(job, data.type, data.payload);

      workerThread.onError = error => queuedJob.onError(job, error);

      queuedJob.onStart(job);

      try {
        await job.result;
      } finally {
        this.returnWorkerToQueue(workerThread);
      }
    }
  }

  returnWorkerToQueue(worker) {
    const shouldDestroyWorker = this.isDestroyed || !this.reuseWorkers || this.count > this._getMaxConcurrency();

    if (shouldDestroyWorker) {
      worker.destroy();
      this.count--;
    } else {
      this.idleQueue.push(worker);
    }

    if (!this.isDestroyed) {
      this._startQueuedJob();
    }
  }

  _getAvailableWorker() {
    if (this.idleQueue.length > 0) {
      return this.idleQueue.shift() || null;
    }

    if (this.count < this._getMaxConcurrency()) {
      this.count++;
      const name = "".concat(this.name.toLowerCase(), " (#").concat(this.count, " of ").concat(this.maxConcurrency, ")");
      return new WorkerThread({
        name,
        source: this.source,
        url: this.url
      });
    }

    return null;
  }

  _getMaxConcurrency() {
    return isMobile ? this.maxMobileConcurrency : this.maxConcurrency;
  }

}

const DEFAULT_PROPS$3 = {
  maxConcurrency: 3,
  maxMobileConcurrency: 1,
  reuseWorkers: true,
  onDebug: () => {}
};
class WorkerFarm {
  static isSupported() {
    return WorkerThread.isSupported();
  }

  static getWorkerFarm(props = {}) {
    WorkerFarm._workerFarm = WorkerFarm._workerFarm || new WorkerFarm({});

    WorkerFarm._workerFarm.setProps(props);

    return WorkerFarm._workerFarm;
  }

  constructor(props) {
    _defineProperty(this, "props", void 0);

    _defineProperty(this, "workerPools", new Map());

    this.props = { ...DEFAULT_PROPS$3
    };
    this.setProps(props);
    this.workerPools = new Map();
  }

  destroy() {
    for (const workerPool of this.workerPools.values()) {
      workerPool.destroy();
    }

    this.workerPools = new Map();
  }

  setProps(props) {
    this.props = { ...this.props,
      ...props
    };

    for (const workerPool of this.workerPools.values()) {
      workerPool.setProps(this._getWorkerPoolProps());
    }
  }

  getWorkerPool(options) {
    const {
      name,
      source,
      url
    } = options;
    let workerPool = this.workerPools.get(name);

    if (!workerPool) {
      workerPool = new WorkerPool$1({
        name,
        source,
        url
      });
      workerPool.setProps(this._getWorkerPoolProps());
      this.workerPools.set(name, workerPool);
    }

    return workerPool;
  }

  _getWorkerPoolProps() {
    return {
      maxConcurrency: this.props.maxConcurrency,
      maxMobileConcurrency: this.props.maxMobileConcurrency,
      reuseWorkers: this.props.reuseWorkers,
      onDebug: this.props.onDebug
    };
  }

}

_defineProperty(WorkerFarm, "_workerFarm", void 0);

const NPM_TAG = 'latest';
function getWorkerURL(worker, options = {}) {
  const workerOptions = options[worker.id] || {};
  const workerFile = "".concat(worker.id, "-worker.js");
  let url = workerOptions.workerUrl;

  if (!url && worker.id === 'compression') {
    url = options.workerUrl;
  }

  if (options._workerType === 'test') {
    url = "modules/".concat(worker.module, "/dist/").concat(workerFile);
  }

  if (!url) {
    let version = worker.version;

    if (version === 'latest') {
      version = NPM_TAG;
    }

    const versionTag = version ? "@".concat(version) : '';
    url = "https://unpkg.com/@loaders.gl/".concat(worker.module).concat(versionTag, "/dist/").concat(workerFile);
  }

  assert$6(url);
  return url;
}

function validateWorkerVersion(worker, coreVersion = VERSION$8) {
  assert$6(worker, 'no worker provided');
  const workerVersion = worker.version;

  if (!coreVersion || !workerVersion) {
    return false;
  }

  return true;
}

var ChildProcessProxy = {};

var node = /*#__PURE__*/_mergeNamespaces({
    __proto__: null,
    'default': ChildProcessProxy
}, [ChildProcessProxy]);

const VERSION$7 = "3.2.12" ;
const loadLibraryPromises = {};
async function loadLibrary(libraryUrl, moduleName = null, options = {}) {
  if (moduleName) {
    libraryUrl = getLibraryUrl(libraryUrl, moduleName, options);
  }

  loadLibraryPromises[libraryUrl] = loadLibraryPromises[libraryUrl] || loadLibraryFromFile(libraryUrl);
  return await loadLibraryPromises[libraryUrl];
}
function getLibraryUrl(library, moduleName, options) {
  if (library.startsWith('http')) {
    return library;
  }

  const modules = options.modules || {};

  if (modules[library]) {
    return modules[library];
  }

  if (!isBrowser$1) {
    return "modules/".concat(moduleName, "/dist/libs/").concat(library);
  }

  if (options.CDN) {
    assert$6(options.CDN.startsWith('http'));
    return "".concat(options.CDN, "/").concat(moduleName, "@").concat(VERSION$7, "/dist/libs/").concat(library);
  }

  if (isWorker) {
    return "../src/libs/".concat(library);
  }

  return "modules/".concat(moduleName, "/src/libs/").concat(library);
}

async function loadLibraryFromFile(libraryUrl) {
  if (libraryUrl.endsWith('wasm')) {
    const response = await fetch(libraryUrl);
    return await response.arrayBuffer();
  }

  if (!isBrowser$1) {
    try {
      return node && ChildProcessProxy.requireFromFile && (await ChildProcessProxy.requireFromFile(libraryUrl));
    } catch {
      return null;
    }
  }

  if (isWorker) {
    return importScripts(libraryUrl);
  }

  const response = await fetch(libraryUrl);
  const scriptSource = await response.text();
  return loadLibraryFromString(scriptSource, libraryUrl);
}

function loadLibraryFromString(scriptSource, id) {
  if (!isBrowser$1) {
    return ChildProcessProxy.requireFromString && ChildProcessProxy.requireFromString(scriptSource, id);
  }

  if (isWorker) {
    eval.call(global_, scriptSource);
    return null;
  }

  const script = document.createElement('script');
  script.id = id;

  try {
    script.appendChild(document.createTextNode(scriptSource));
  } catch (e) {
    script.text = scriptSource;
  }

  document.body.appendChild(script);
  return null;
}

function canParseWithWorker(loader, options) {
  if (!WorkerFarm.isSupported()) {
    return false;
  }

  if (!isBrowser$1 && !(options !== null && options !== void 0 && options._nodeWorkers)) {
    return false;
  }

  return loader.worker && (options === null || options === void 0 ? void 0 : options.worker);
}
async function parseWithWorker(loader, data, options, context, parseOnMainThread) {
  const name = loader.id;
  const url = getWorkerURL(loader, options);
  const workerFarm = WorkerFarm.getWorkerFarm(options);
  const workerPool = workerFarm.getWorkerPool({
    name,
    url
  });
  options = JSON.parse(JSON.stringify(options));
  context = JSON.parse(JSON.stringify(context || {}));
  const job = await workerPool.startJob('process-on-worker', onMessage.bind(null, parseOnMainThread));
  job.postMessage('process', {
    input: data,
    options,
    context
  });
  const result = await job.result;
  return await result.result;
}

async function onMessage(parseOnMainThread, job, type, payload) {
  switch (type) {
    case 'done':
      job.done(payload);
      break;

    case 'error':
      job.error(new Error(payload.error));
      break;

    case 'process':
      const {
        id,
        input,
        options
      } = payload;

      try {
        const result = await parseOnMainThread(input, options);
        job.postMessage('done', {
          id,
          result
        });
      } catch (error) {
        const message = error instanceof Error ? error.message : 'unknown error';
        job.postMessage('error', {
          id,
          error: message
        });
      }

      break;

    default:
      console.warn("parse-with-worker unknown message ".concat(type));
  }
}

function getFirstCharacters$1(data, length = 5) {
  if (typeof data === 'string') {
    return data.slice(0, length);
  } else if (ArrayBuffer.isView(data)) {
    return getMagicString$3(data.buffer, data.byteOffset, length);
  } else if (data instanceof ArrayBuffer) {
    const byteOffset = 0;
    return getMagicString$3(data, byteOffset, length);
  }

  return '';
}
function getMagicString$3(arrayBuffer, byteOffset, length) {
  if (arrayBuffer.byteLength <= byteOffset + length) {
    return '';
  }

  const dataView = new DataView(arrayBuffer);
  let magic = '';

  for (let i = 0; i < length; i++) {
    magic += String.fromCharCode(dataView.getUint8(byteOffset + i));
  }

  return magic;
}

function parseJSON(string) {
  try {
    return JSON.parse(string);
  } catch (_) {
    throw new Error("Failed to parse JSON from data starting with \"".concat(getFirstCharacters$1(string), "\""));
  }
}

function isBuffer$1(value) {
  return value && typeof value === 'object' && value.isBuffer;
}
function bufferToArrayBuffer(buffer) {
  if (isBuffer$1(buffer)) {
    const typedArray = new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.length);
    return typedArray.slice().buffer;
  }

  return buffer;
}

function toArrayBuffer(data) {
  if (isBuffer$1(data)) {
    return bufferToArrayBuffer(data);
  }

  if (data instanceof ArrayBuffer) {
    return data;
  }

  if (ArrayBuffer.isView(data)) {
    if (data.byteOffset === 0 && data.byteLength === data.buffer.byteLength) {
      return data.buffer;
    }

    return data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
  }

  if (typeof data === 'string') {
    const text = data;
    const uint8Array = new TextEncoder().encode(text);
    return uint8Array.buffer;
  }

  if (data && typeof data === 'object' && data._toArrayBuffer) {
    return data._toArrayBuffer();
  }

  throw new Error('toArrayBuffer');
}
function compareArrayBuffers(arrayBuffer1, arrayBuffer2, byteLength) {
  byteLength = byteLength || arrayBuffer1.byteLength;

  if (arrayBuffer1.byteLength < byteLength || arrayBuffer2.byteLength < byteLength) {
    return false;
  }

  const array1 = new Uint8Array(arrayBuffer1);
  const array2 = new Uint8Array(arrayBuffer2);

  for (let i = 0; i < array1.length; ++i) {
    if (array1[i] !== array2[i]) {
      return false;
    }
  }

  return true;
}
function concatenateArrayBuffers(...sources) {
  const sourceArrays = sources.map(source2 => source2 instanceof ArrayBuffer ? new Uint8Array(source2) : source2);
  const byteLength = sourceArrays.reduce((length, typedArray) => length + typedArray.byteLength, 0);
  const result = new Uint8Array(byteLength);
  let offset = 0;

  for (const sourceArray of sourceArrays) {
    result.set(sourceArray, offset);
    offset += sourceArray.byteLength;
  }

  return result.buffer;
}
function sliceArrayBuffer(arrayBuffer, byteOffset, byteLength) {
  const subArray = byteLength !== undefined ? new Uint8Array(arrayBuffer).subarray(byteOffset, byteOffset + byteLength) : new Uint8Array(arrayBuffer).subarray(byteOffset);
  const arrayCopy = new Uint8Array(subArray);
  return arrayCopy.buffer;
}

function padToNBytes(byteLength, padding) {
  assert$7(byteLength >= 0);
  assert$7(padding > 0);
  return byteLength + (padding - 1) & ~(padding - 1);
}
function copyToArray(source, target, targetOffset) {
  let sourceArray;

  if (source instanceof ArrayBuffer) {
    sourceArray = new Uint8Array(source);
  } else {
    const srcByteOffset = source.byteOffset;
    const srcByteLength = source.byteLength;
    sourceArray = new Uint8Array(source.buffer || source.arrayBuffer, srcByteOffset, srcByteLength);
  }

  target.set(sourceArray, targetOffset);
  return targetOffset + padToNBytes(sourceArray.byteLength, 4);
}

async function concatenateArrayBuffersAsync(asyncIterator) {
  const arrayBuffers = [];

  for await (const chunk of asyncIterator) {
    arrayBuffers.push(chunk);
  }

  return concatenateArrayBuffers(...arrayBuffers);
}

function getHiResTimestamp$1() {
  let timestamp;

  if (typeof window !== 'undefined' && window.performance) {
    timestamp = window.performance.now();
  } else if (typeof process !== 'undefined' && process.hrtime) {
    const timeParts = process.hrtime();
    timestamp = timeParts[0] * 1000 + timeParts[1] / 1e6;
  } else {
    timestamp = Date.now();
  }

  return timestamp;
}

class Stat {
  constructor(name, type) {
    _defineProperty(this, "name", void 0);

    _defineProperty(this, "type", void 0);

    _defineProperty(this, "sampleSize", 1);

    _defineProperty(this, "time", void 0);

    _defineProperty(this, "count", void 0);

    _defineProperty(this, "samples", void 0);

    _defineProperty(this, "lastTiming", void 0);

    _defineProperty(this, "lastSampleTime", void 0);

    _defineProperty(this, "lastSampleCount", void 0);

    _defineProperty(this, "_count", 0);

    _defineProperty(this, "_time", 0);

    _defineProperty(this, "_samples", 0);

    _defineProperty(this, "_startTime", 0);

    _defineProperty(this, "_timerPending", false);

    this.name = name;
    this.type = type;
    this.reset();
  }

  setSampleSize(samples) {
    this.sampleSize = samples;
    return this;
  }

  incrementCount() {
    this.addCount(1);
    return this;
  }

  decrementCount() {
    this.subtractCount(1);
    return this;
  }

  addCount(value) {
    this._count += value;
    this._samples++;

    this._checkSampling();

    return this;
  }

  subtractCount(value) {
    this._count -= value;
    this._samples++;

    this._checkSampling();

    return this;
  }

  addTime(time) {
    this._time += time;
    this.lastTiming = time;
    this._samples++;

    this._checkSampling();

    return this;
  }

  timeStart() {
    this._startTime = getHiResTimestamp$1();
    this._timerPending = true;
    return this;
  }

  timeEnd() {
    if (!this._timerPending) {
      return this;
    }

    this.addTime(getHiResTimestamp$1() - this._startTime);
    this._timerPending = false;

    this._checkSampling();

    return this;
  }

  getSampleAverageCount() {
    return this.sampleSize > 0 ? this.lastSampleCount / this.sampleSize : 0;
  }

  getSampleAverageTime() {
    return this.sampleSize > 0 ? this.lastSampleTime / this.sampleSize : 0;
  }

  getSampleHz() {
    return this.lastSampleTime > 0 ? this.sampleSize / (this.lastSampleTime / 1000) : 0;
  }

  getAverageCount() {
    return this.samples > 0 ? this.count / this.samples : 0;
  }

  getAverageTime() {
    return this.samples > 0 ? this.time / this.samples : 0;
  }

  getHz() {
    return this.time > 0 ? this.samples / (this.time / 1000) : 0;
  }

  reset() {
    this.time = 0;
    this.count = 0;
    this.samples = 0;
    this.lastTiming = 0;
    this.lastSampleTime = 0;
    this.lastSampleCount = 0;
    this._count = 0;
    this._time = 0;
    this._samples = 0;
    this._startTime = 0;
    this._timerPending = false;
    return this;
  }

  _checkSampling() {
    if (this._samples === this.sampleSize) {
      this.lastSampleTime = this._time;
      this.lastSampleCount = this._count;
      this.count += this._count;
      this.time += this._time;
      this.samples += this._samples;
      this._time = 0;
      this._count = 0;
      this._samples = 0;
    }
  }

}

class Stats {
  constructor(options) {
    _defineProperty(this, "id", void 0);

    _defineProperty(this, "stats", {});

    this.id = options.id;
    this.stats = {};

    this._initializeStats(options.stats);

    Object.seal(this);
  }

  get(name) {
    let type = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'count';
    return this._getOrCreate({
      name,
      type
    });
  }

  get size() {
    return Object.keys(this.stats).length;
  }

  reset() {
    for (const key in this.stats) {
      this.stats[key].reset();
    }

    return this;
  }

  forEach(fn) {
    for (const key in this.stats) {
      fn(this.stats[key]);
    }
  }

  getTable() {
    const table = {};
    this.forEach(stat => {
      table[stat.name] = {
        time: stat.time || 0,
        count: stat.count || 0,
        average: stat.getAverageTime() || 0,
        hz: stat.getHz() || 0
      };
    });
    return table;
  }

  _initializeStats() {
    let stats = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    stats.forEach(stat => this._getOrCreate(stat));
  }

  _getOrCreate(stat) {
    if (!stat || !stat.name) {
      return null;
    }

    const {
      name,
      type
    } = stat;

    if (!this.stats[name]) {
      if (stat instanceof Stat) {
        this.stats[name] = stat;
      } else {
        this.stats[name] = new Stat(name, type);
      }
    }

    return this.stats[name];
  }

}

const STAT_QUEUED_REQUESTS = 'Queued Requests';
const STAT_ACTIVE_REQUESTS = 'Active Requests';
const STAT_CANCELLED_REQUESTS = 'Cancelled Requests';
const STAT_QUEUED_REQUESTS_EVER = 'Queued Requests Ever';
const STAT_ACTIVE_REQUESTS_EVER = 'Active Requests Ever';
const DEFAULT_PROPS$2 = {
  id: 'request-scheduler',
  throttleRequests: true,
  maxRequests: 6
};
class RequestScheduler {
  constructor(props = {}) {
    _defineProperty(this, "props", void 0);

    _defineProperty(this, "stats", void 0);

    _defineProperty(this, "activeRequestCount", 0);

    _defineProperty(this, "requestQueue", []);

    _defineProperty(this, "requestMap", new Map());

    _defineProperty(this, "deferredUpdate", null);

    this.props = { ...DEFAULT_PROPS$2,
      ...props
    };
    this.stats = new Stats({
      id: this.props.id
    });
    this.stats.get(STAT_QUEUED_REQUESTS);
    this.stats.get(STAT_ACTIVE_REQUESTS);
    this.stats.get(STAT_CANCELLED_REQUESTS);
    this.stats.get(STAT_QUEUED_REQUESTS_EVER);
    this.stats.get(STAT_ACTIVE_REQUESTS_EVER);
  }

  scheduleRequest(handle, getPriority = () => 0) {
    if (!this.props.throttleRequests) {
      return Promise.resolve({
        done: () => {}
      });
    }

    if (this.requestMap.has(handle)) {
      return this.requestMap.get(handle);
    }

    const request = {
      handle,
      priority: 0,
      getPriority
    };
    const promise = new Promise(resolve => {
      request.resolve = resolve;
      return request;
    });
    this.requestQueue.push(request);
    this.requestMap.set(handle, promise);

    this._issueNewRequests();

    return promise;
  }

  _issueRequest(request) {
    const {
      handle,
      resolve
    } = request;
    let isDone = false;

    const done = () => {
      if (!isDone) {
        isDone = true;
        this.requestMap.delete(handle);
        this.activeRequestCount--;

        this._issueNewRequests();
      }
    };

    this.activeRequestCount++;
    return resolve ? resolve({
      done
    }) : Promise.resolve({
      done
    });
  }

  _issueNewRequests() {
    if (!this.deferredUpdate) {
      this.deferredUpdate = setTimeout(() => this._issueNewRequestsAsync(), 0);
    }
  }

  _issueNewRequestsAsync() {
    this.deferredUpdate = null;
    const freeSlots = Math.max(this.props.maxRequests - this.activeRequestCount, 0);

    if (freeSlots === 0) {
      return;
    }

    this._updateAllRequests();

    for (let i = 0; i < freeSlots; ++i) {
      const request = this.requestQueue.shift();

      if (request) {
        this._issueRequest(request);
      }
    }
  }

  _updateAllRequests() {
    const requestQueue = this.requestQueue;

    for (let i = 0; i < requestQueue.length; ++i) {
      const request = requestQueue[i];

      if (!this._updateRequest(request)) {
        requestQueue.splice(i, 1);
        this.requestMap.delete(request.handle);
        i--;
      }
    }

    requestQueue.sort((a, b) => a.priority - b.priority);
  }

  _updateRequest(request) {
    request.priority = request.getPriority(request.handle);

    if (request.priority < 0) {
      request.resolve(null);
      return false;
    }

    return true;
  }

}

let pathPrefix = '';
const fileAliases = {};
function resolvePath(filename) {
  for (const alias in fileAliases) {
    if (filename.startsWith(alias)) {
      const replacement = fileAliases[alias];
      filename = filename.replace(alias, replacement);
    }
  }

  if (!filename.startsWith('http://') && !filename.startsWith('https://')) {
    filename = "".concat(pathPrefix).concat(filename);
  }

  return filename;
}

function filename(url) {
  const slashIndex = url && url.lastIndexOf('/');
  return slashIndex >= 0 ? url.substr(slashIndex + 1) : '';
}
function dirname(url) {
  const slashIndex = url && url.lastIndexOf('/');
  return slashIndex >= 0 ? url.substr(0, slashIndex) : '';
}

const isBoolean = x => typeof x === 'boolean';

const isFunction = x => typeof x === 'function';

const isObject = x => x !== null && typeof x === 'object';
const isPureObject = x => isObject(x) && x.constructor === {}.constructor;
const isIterable = x => x && typeof x[Symbol.iterator] === 'function';
const isAsyncIterable = x => x && typeof x[Symbol.asyncIterator] === 'function';
const isResponse = x => typeof Response !== 'undefined' && x instanceof Response || x && x.arrayBuffer && x.text && x.json;
const isBlob = x => typeof Blob !== 'undefined' && x instanceof Blob;
const isBuffer = x => x && typeof x === 'object' && x.isBuffer;
const isReadableDOMStream = x => typeof ReadableStream !== 'undefined' && x instanceof ReadableStream || isObject(x) && isFunction(x.tee) && isFunction(x.cancel) && isFunction(x.getReader);
const isReadableNodeStream = x => isObject(x) && isFunction(x.read) && isFunction(x.pipe) && isBoolean(x.readable);
const isReadableStream = x => isReadableDOMStream(x) || isReadableNodeStream(x);

const DATA_URL_PATTERN = /^data:([-\w.]+\/[-\w.+]+)(;|,)/;
const MIME_TYPE_PATTERN = /^([-\w.]+\/[-\w.+]+)/;
function parseMIMEType(mimeString) {
  const matches = MIME_TYPE_PATTERN.exec(mimeString);

  if (matches) {
    return matches[1];
  }

  return mimeString;
}
function parseMIMETypeFromURL(url) {
  const matches = DATA_URL_PATTERN.exec(url);

  if (matches) {
    return matches[1];
  }

  return '';
}

const QUERY_STRING_PATTERN = /\?.*/;
function getResourceUrlAndType(resource) {
  if (isResponse(resource)) {
    const url = stripQueryString(resource.url || '');
    const contentTypeHeader = resource.headers.get('content-type') || '';
    return {
      url,
      type: parseMIMEType(contentTypeHeader) || parseMIMETypeFromURL(url)
    };
  }

  if (isBlob(resource)) {
    return {
      url: stripQueryString(resource.name || ''),
      type: resource.type || ''
    };
  }

  if (typeof resource === 'string') {
    return {
      url: stripQueryString(resource),
      type: parseMIMETypeFromURL(resource)
    };
  }

  return {
    url: '',
    type: ''
  };
}
function getResourceContentLength(resource) {
  if (isResponse(resource)) {
    return resource.headers['content-length'] || -1;
  }

  if (isBlob(resource)) {
    return resource.size;
  }

  if (typeof resource === 'string') {
    return resource.length;
  }

  if (resource instanceof ArrayBuffer) {
    return resource.byteLength;
  }

  if (ArrayBuffer.isView(resource)) {
    return resource.byteLength;
  }

  return -1;
}

function stripQueryString(url) {
  return url.replace(QUERY_STRING_PATTERN, '');
}

async function makeResponse(resource) {
  if (isResponse(resource)) {
    return resource;
  }

  const headers = {};
  const contentLength = getResourceContentLength(resource);

  if (contentLength >= 0) {
    headers['content-length'] = String(contentLength);
  }

  const {
    url,
    type
  } = getResourceUrlAndType(resource);

  if (type) {
    headers['content-type'] = type;
  }

  const initialDataUrl = await getInitialDataUrl(resource);

  if (initialDataUrl) {
    headers['x-first-bytes'] = initialDataUrl;
  }

  if (typeof resource === 'string') {
    resource = new TextEncoder().encode(resource);
  }

  const response = new Response(resource, {
    headers
  });
  Object.defineProperty(response, 'url', {
    value: url
  });
  return response;
}
async function checkResponse(response) {
  if (!response.ok) {
    const message = await getResponseError(response);
    throw new Error(message);
  }
}

async function getResponseError(response) {
  let message = "Failed to fetch resource ".concat(response.url, " (").concat(response.status, "): ");

  try {
    const contentType = response.headers.get('Content-Type');
    let text = response.statusText;

    if (contentType.includes('application/json')) {
      text += " ".concat(await response.text());
    }

    message += text;
    message = message.length > 60 ? "".concat(message.slice(0, 60), "...") : message;
  } catch (error) {}

  return message;
}

async function getInitialDataUrl(resource) {
  const INITIAL_DATA_LENGTH = 5;

  if (typeof resource === 'string') {
    return "data:,".concat(resource.slice(0, INITIAL_DATA_LENGTH));
  }

  if (resource instanceof Blob) {
    const blobSlice = resource.slice(0, 5);
    return await new Promise(resolve => {
      const reader = new FileReader();

      reader.onload = event => {
        var _event$target;

        return resolve(event === null || event === void 0 ? void 0 : (_event$target = event.target) === null || _event$target === void 0 ? void 0 : _event$target.result);
      };

      reader.readAsDataURL(blobSlice);
    });
  }

  if (resource instanceof ArrayBuffer) {
    const slice = resource.slice(0, INITIAL_DATA_LENGTH);
    const base64 = arrayBufferToBase64(slice);
    return "data:base64,".concat(base64);
  }

  return null;
}

function arrayBufferToBase64(buffer) {
  let binary = '';
  const bytes = new Uint8Array(buffer);

  for (let i = 0; i < bytes.byteLength; i++) {
    binary += String.fromCharCode(bytes[i]);
  }

  return btoa(binary);
}

async function fetchFile(url, options) {
  if (typeof url === 'string') {
    url = resolvePath(url);
    let fetchOptions = options;

    if (options !== null && options !== void 0 && options.fetch && typeof (options === null || options === void 0 ? void 0 : options.fetch) !== 'function') {
      fetchOptions = options.fetch;
    }

    return await fetch(url, fetchOptions);
  }

  return await makeResponse(url);
}

function isElectron(mockUserAgent) {
  if (typeof window !== 'undefined' && typeof window.process === 'object' && window.process.type === 'renderer') {
    return true;
  }

  if (typeof process !== 'undefined' && typeof process.versions === 'object' && Boolean(process.versions['electron'])) {
    return true;
  }

  const realUserAgent = typeof navigator === 'object' && typeof navigator.userAgent === 'string' && navigator.userAgent;
  const userAgent = mockUserAgent || realUserAgent;

  if (userAgent && userAgent.indexOf('Electron') >= 0) {
    return true;
  }

  return false;
}

function isBrowser() {
  const isNode = typeof process === 'object' && String(process) === '[object process]' && !process.browser;
  return !isNode || isElectron();
}

const globals = {
  self: typeof self !== 'undefined' && self,
  window: typeof window !== 'undefined' && window,
  global: typeof global !== 'undefined' && global,
  document: typeof document !== 'undefined' && document,
  process: typeof process === 'object' && process
};
const window_ = globals.window || globals.self || globals.global;
const process_ = globals.process || {};

const VERSION$6 = typeof __VERSION__ !== 'undefined' ? __VERSION__ : 'untranspiled source';
isBrowser();

function getStorage(type) {
  try {
    const storage = window[type];
    const x = '__storage_test__';
    storage.setItem(x, x);
    storage.removeItem(x);
    return storage;
  } catch (e) {
    return null;
  }
}

class LocalStorage {
  constructor(id, defaultConfig) {
    let type = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'sessionStorage';

    _defineProperty(this, "storage", void 0);

    _defineProperty(this, "id", void 0);

    _defineProperty(this, "config", void 0);

    this.storage = getStorage(type);
    this.id = id;
    this.config = defaultConfig;

    this._loadConfiguration();
  }

  getConfiguration() {
    return this.config;
  }

  setConfiguration(configuration) {
    Object.assign(this.config, configuration);

    if (this.storage) {
      const serialized = JSON.stringify(this.config);
      this.storage.setItem(this.id, serialized);
    }
  }

  _loadConfiguration() {
    let configuration = {};

    if (this.storage) {
      const serializedConfiguration = this.storage.getItem(this.id);
      configuration = serializedConfiguration ? JSON.parse(serializedConfiguration) : {};
    }

    Object.assign(this.config, configuration);
    return this;
  }

}

function formatTime(ms) {
  let formatted;

  if (ms < 10) {
    formatted = "".concat(ms.toFixed(2), "ms");
  } else if (ms < 100) {
    formatted = "".concat(ms.toFixed(1), "ms");
  } else if (ms < 1000) {
    formatted = "".concat(ms.toFixed(0), "ms");
  } else {
    formatted = "".concat((ms / 1000).toFixed(2), "s");
  }

  return formatted;
}
function leftPad(string) {
  let length = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 8;
  const padLength = Math.max(length - string.length, 0);
  return "".concat(' '.repeat(padLength)).concat(string);
}

function formatImage(image, message, scale) {
  let maxWidth = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 600;
  const imageUrl = image.src.replace(/\(/g, '%28').replace(/\)/g, '%29');

  if (image.width > maxWidth) {
    scale = Math.min(scale, maxWidth / image.width);
  }

  const width = image.width * scale;
  const height = image.height * scale;
  const style = ['font-size:1px;', "padding:".concat(Math.floor(height / 2), "px ").concat(Math.floor(width / 2), "px;"), "line-height:".concat(height, "px;"), "background:url(".concat(imageUrl, ");"), "background-size:".concat(width, "px ").concat(height, "px;"), 'color:transparent;'].join('');
  return ["".concat(message, " %c+"), style];
}

let COLOR;

(function (COLOR) {
  COLOR[COLOR["BLACK"] = 30] = "BLACK";
  COLOR[COLOR["RED"] = 31] = "RED";
  COLOR[COLOR["GREEN"] = 32] = "GREEN";
  COLOR[COLOR["YELLOW"] = 33] = "YELLOW";
  COLOR[COLOR["BLUE"] = 34] = "BLUE";
  COLOR[COLOR["MAGENTA"] = 35] = "MAGENTA";
  COLOR[COLOR["CYAN"] = 36] = "CYAN";
  COLOR[COLOR["WHITE"] = 37] = "WHITE";
  COLOR[COLOR["BRIGHT_BLACK"] = 90] = "BRIGHT_BLACK";
  COLOR[COLOR["BRIGHT_RED"] = 91] = "BRIGHT_RED";
  COLOR[COLOR["BRIGHT_GREEN"] = 92] = "BRIGHT_GREEN";
  COLOR[COLOR["BRIGHT_YELLOW"] = 93] = "BRIGHT_YELLOW";
  COLOR[COLOR["BRIGHT_BLUE"] = 94] = "BRIGHT_BLUE";
  COLOR[COLOR["BRIGHT_MAGENTA"] = 95] = "BRIGHT_MAGENTA";
  COLOR[COLOR["BRIGHT_CYAN"] = 96] = "BRIGHT_CYAN";
  COLOR[COLOR["BRIGHT_WHITE"] = 97] = "BRIGHT_WHITE";
})(COLOR || (COLOR = {}));

function getColor(color) {
  return typeof color === 'string' ? COLOR[color.toUpperCase()] || COLOR.WHITE : color;
}

function addColor(string, color, background) {
  if (!isBrowser && typeof string === 'string') {
    if (color) {
      color = getColor(color);
      string = "\x1B[".concat(color, "m").concat(string, "\x1B[39m");
    }

    if (background) {
      color = getColor(background);
      string = "\x1B[".concat(background + 10, "m").concat(string, "\x1B[49m");
    }
  }

  return string;
}

function autobind(obj) {
  let predefined = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : ['constructor'];
  const proto = Object.getPrototypeOf(obj);
  const propNames = Object.getOwnPropertyNames(proto);

  for (const key of propNames) {
    if (typeof obj[key] === 'function') {
      if (!predefined.find(name => key === name)) {
        obj[key] = obj[key].bind(obj);
      }
    }
  }
}

function assert$5(condition, message) {
  if (!condition) {
    throw new Error(message || 'Assertion failed');
  }
}

function getHiResTimestamp() {
  let timestamp;

  if (isBrowser && 'performance' in window_) {
    var _window$performance, _window$performance$n;

    timestamp = window_ === null || window_ === void 0 ? void 0 : (_window$performance = window_.performance) === null || _window$performance === void 0 ? void 0 : (_window$performance$n = _window$performance.now) === null || _window$performance$n === void 0 ? void 0 : _window$performance$n.call(_window$performance);
  } else if ('hrtime' in process_) {
    var _process$hrtime;

    const timeParts = process_ === null || process_ === void 0 ? void 0 : (_process$hrtime = process_.hrtime) === null || _process$hrtime === void 0 ? void 0 : _process$hrtime.call(process_);
    timestamp = timeParts[0] * 1000 + timeParts[1] / 1e6;
  } else {
    timestamp = Date.now();
  }

  return timestamp;
}

const originalConsole = {
  debug: isBrowser ? console.debug || console.log : console.log,
  log: console.log,
  info: console.info,
  warn: console.warn,
  error: console.error
};
const DEFAULT_SETTINGS = {
  enabled: true,
  level: 0
};

function noop() {}

const cache = {};
const ONCE = {
  once: true
};
class Log {
  constructor() {
    let {
      id
    } = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {
      id: ''
    };

    _defineProperty(this, "id", void 0);

    _defineProperty(this, "VERSION", VERSION$6);

    _defineProperty(this, "_startTs", getHiResTimestamp());

    _defineProperty(this, "_deltaTs", getHiResTimestamp());

    _defineProperty(this, "_storage", void 0);

    _defineProperty(this, "userData", {});

    _defineProperty(this, "LOG_THROTTLE_TIMEOUT", 0);

    this.id = id;
    this.userData = {};
    this._storage = new LocalStorage("__probe-".concat(this.id, "__"), DEFAULT_SETTINGS);
    this.timeStamp("".concat(this.id, " started"));
    autobind(this);
    Object.seal(this);
  }

  set level(newLevel) {
    this.setLevel(newLevel);
  }

  get level() {
    return this.getLevel();
  }

  isEnabled() {
    return this._storage.config.enabled;
  }

  getLevel() {
    return this._storage.config.level;
  }

  getTotal() {
    return Number((getHiResTimestamp() - this._startTs).toPrecision(10));
  }

  getDelta() {
    return Number((getHiResTimestamp() - this._deltaTs).toPrecision(10));
  }

  set priority(newPriority) {
    this.level = newPriority;
  }

  get priority() {
    return this.level;
  }

  getPriority() {
    return this.level;
  }

  enable() {
    let enabled = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true;

    this._storage.setConfiguration({
      enabled
    });

    return this;
  }

  setLevel(level) {
    this._storage.setConfiguration({
      level
    });

    return this;
  }

  get(setting) {
    return this._storage.config[setting];
  }

  set(setting, value) {
    this._storage.setConfiguration({
      [setting]: value
    });
  }

  settings() {
    if (console.table) {
      console.table(this._storage.config);
    } else {
      console.log(this._storage.config);
    }
  }

  assert(condition, message) {
    assert$5(condition, message);
  }

  warn(message) {
    return this._getLogFunction(0, message, originalConsole.warn, arguments, ONCE);
  }

  error(message) {
    return this._getLogFunction(0, message, originalConsole.error, arguments);
  }

  deprecated(oldUsage, newUsage) {
    return this.warn("`".concat(oldUsage, "` is deprecated and will be removed in a later version. Use `").concat(newUsage, "` instead"));
  }

  removed(oldUsage, newUsage) {
    return this.error("`".concat(oldUsage, "` has been removed. Use `").concat(newUsage, "` instead"));
  }

  probe(logLevel, message) {
    return this._getLogFunction(logLevel, message, originalConsole.log, arguments, {
      time: true,
      once: true
    });
  }

  log(logLevel, message) {
    return this._getLogFunction(logLevel, message, originalConsole.debug, arguments);
  }

  info(logLevel, message) {
    return this._getLogFunction(logLevel, message, console.info, arguments);
  }

  once(logLevel, message) {
    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    return this._getLogFunction(logLevel, message, originalConsole.debug || originalConsole.info, arguments, ONCE);
  }

  table(logLevel, table, columns) {
    if (table) {
      return this._getLogFunction(logLevel, table, console.table || noop, columns && [columns], {
        tag: getTableHeader(table)
      });
    }

    return noop;
  }

  image(_ref) {
    let {
      logLevel,
      priority,
      image,
      message = '',
      scale = 1
    } = _ref;

    if (!this._shouldLog(logLevel || priority)) {
      return noop;
    }

    return isBrowser ? logImageInBrowser({
      image,
      message,
      scale
    }) : logImageInNode();
  }

  time(logLevel, message) {
    return this._getLogFunction(logLevel, message, console.time ? console.time : console.info);
  }

  timeEnd(logLevel, message) {
    return this._getLogFunction(logLevel, message, console.timeEnd ? console.timeEnd : console.info);
  }

  timeStamp(logLevel, message) {
    return this._getLogFunction(logLevel, message, console.timeStamp || noop);
  }

  group(logLevel, message) {
    let opts = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {
      collapsed: false
    };
    const options = normalizeArguments({
      logLevel,
      message,
      opts
    });
    const {
      collapsed
    } = opts;
    options.method = (collapsed ? console.groupCollapsed : console.group) || console.info;
    return this._getLogFunction(options);
  }

  groupCollapsed(logLevel, message) {
    let opts = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
    return this.group(logLevel, message, Object.assign({}, opts, {
      collapsed: true
    }));
  }

  groupEnd(logLevel) {
    return this._getLogFunction(logLevel, '', console.groupEnd || noop);
  }

  withGroup(logLevel, message, func) {
    this.group(logLevel, message)();

    try {
      func();
    } finally {
      this.groupEnd(logLevel)();
    }
  }

  trace() {
    if (console.trace) {
      console.trace();
    }
  }

  _shouldLog(logLevel) {
    return this.isEnabled() && this.getLevel() >= normalizeLogLevel(logLevel);
  }

  _getLogFunction(logLevel, message, method, args, opts) {
    if (this._shouldLog(logLevel)) {
      opts = normalizeArguments({
        logLevel,
        message,
        args,
        opts
      });
      method = method || opts.method;
      assert$5(method);
      opts.total = this.getTotal();
      opts.delta = this.getDelta();
      this._deltaTs = getHiResTimestamp();
      const tag = opts.tag || opts.message;

      if (opts.once) {
        if (!cache[tag]) {
          cache[tag] = getHiResTimestamp();
        } else {
          return noop;
        }
      }

      message = decorateMessage(this.id, opts.message, opts);
      return method.bind(console, message, ...opts.args);
    }

    return noop;
  }

}

_defineProperty(Log, "VERSION", VERSION$6);

function normalizeLogLevel(logLevel) {
  if (!logLevel) {
    return 0;
  }

  let resolvedLevel;

  switch (typeof logLevel) {
    case 'number':
      resolvedLevel = logLevel;
      break;

    case 'object':
      resolvedLevel = logLevel.logLevel || logLevel.priority || 0;
      break;

    default:
      return 0;
  }

  assert$5(Number.isFinite(resolvedLevel) && resolvedLevel >= 0);
  return resolvedLevel;
}

function normalizeArguments(opts) {
  const {
    logLevel,
    message
  } = opts;
  opts.logLevel = normalizeLogLevel(logLevel);
  const args = opts.args ? Array.from(opts.args) : [];

  while (args.length && args.shift() !== message) {}

  switch (typeof logLevel) {
    case 'string':
    case 'function':
      if (message !== undefined) {
        args.unshift(message);
      }

      opts.message = logLevel;
      break;

    case 'object':
      Object.assign(opts, logLevel);
      break;
  }

  if (typeof opts.message === 'function') {
    opts.message = opts.message();
  }

  const messageType = typeof opts.message;
  assert$5(messageType === 'string' || messageType === 'object');
  return Object.assign(opts, {
    args
  }, opts.opts);
}

function decorateMessage(id, message, opts) {
  if (typeof message === 'string') {
    const time = opts.time ? leftPad(formatTime(opts.total)) : '';
    message = opts.time ? "".concat(id, ": ").concat(time, "  ").concat(message) : "".concat(id, ": ").concat(message);
    message = addColor(message, opts.color, opts.background);
  }

  return message;
}

function logImageInNode(_ref2) {
  console.warn('removed');
  return noop;
}

function logImageInBrowser(_ref3) {
  let {
    image,
    message = '',
    scale = 1
  } = _ref3;

  if (typeof image === 'string') {
    const img = new Image();

    img.onload = () => {
      const args = formatImage(img, message, scale);
      console.log(...args);
    };

    img.src = image;
    return noop;
  }

  const element = image.nodeName || '';

  if (element.toLowerCase() === 'img') {
    console.log(...formatImage(image, message, scale));
    return noop;
  }

  if (element.toLowerCase() === 'canvas') {
    const img = new Image();

    img.onload = () => console.log(...formatImage(img, message, scale));

    img.src = image.toDataURL();
    return noop;
  }

  return noop;
}

function getTableHeader(table) {
  for (const key in table) {
    for (const title in table[key]) {
      return title || 'untitled';
    }
  }

  return 'empty';
}

const probeLog = new Log({
  id: 'loaders.gl'
});
class NullLog {
  log() {
    return () => {};
  }

  info() {
    return () => {};
  }

  warn() {
    return () => {};
  }

  error() {
    return () => {};
  }

}
class ConsoleLog {
  constructor() {
    _defineProperty(this, "console", void 0);

    this.console = console;
  }

  log(...args) {
    return this.console.log.bind(this.console, ...args);
  }

  info(...args) {
    return this.console.info.bind(this.console, ...args);
  }

  warn(...args) {
    return this.console.warn.bind(this.console, ...args);
  }

  error(...args) {
    return this.console.error.bind(this.console, ...args);
  }

}

const DEFAULT_LOADER_OPTIONS = {
  fetch: null,
  mimeType: undefined,
  nothrow: false,
  log: new ConsoleLog(),
  CDN: 'https://unpkg.com/@loaders.gl',
  worker: true,
  maxConcurrency: 3,
  maxMobileConcurrency: 1,
  reuseWorkers: isBrowser$2,
  _nodeWorkers: false,
  _workerType: '',
  limit: 0,
  _limitMB: 0,
  batchSize: 'auto',
  batchDebounceMs: 0,
  metadata: false,
  transforms: []
};
const REMOVED_LOADER_OPTIONS = {
  throws: 'nothrow',
  dataType: '(no longer used)',
  uri: 'baseUri',
  method: 'fetch.method',
  headers: 'fetch.headers',
  body: 'fetch.body',
  mode: 'fetch.mode',
  credentials: 'fetch.credentials',
  cache: 'fetch.cache',
  redirect: 'fetch.redirect',
  referrer: 'fetch.referrer',
  referrerPolicy: 'fetch.referrerPolicy',
  integrity: 'fetch.integrity',
  keepalive: 'fetch.keepalive',
  signal: 'fetch.signal'
};

function getGlobalLoaderState() {
  globalThis.loaders = globalThis.loaders || {};
  const {
    loaders
  } = globalThis;
  loaders._state = loaders._state || {};
  return loaders._state;
}
const getGlobalLoaderOptions = () => {
  const state = getGlobalLoaderState();
  state.globalOptions = state.globalOptions || { ...DEFAULT_LOADER_OPTIONS
  };
  return state.globalOptions;
};
function normalizeOptions(options, loader, loaders, url) {
  loaders = loaders || [];
  loaders = Array.isArray(loaders) ? loaders : [loaders];
  validateOptions(options, loaders);
  return normalizeOptionsInternal(loader, options, url);
}
function getFetchFunction(options, context) {
  const globalOptions = getGlobalLoaderOptions();
  const fetchOptions = options || globalOptions;

  if (typeof fetchOptions.fetch === 'function') {
    return fetchOptions.fetch;
  }

  if (isObject(fetchOptions.fetch)) {
    return url => fetchFile(url, fetchOptions);
  }

  if (context !== null && context !== void 0 && context.fetch) {
    return context === null || context === void 0 ? void 0 : context.fetch;
  }

  return fetchFile;
}

function validateOptions(options, loaders) {
  validateOptionsObject(options, null, DEFAULT_LOADER_OPTIONS, REMOVED_LOADER_OPTIONS, loaders);

  for (const loader of loaders) {
    const idOptions = options && options[loader.id] || {};
    const loaderOptions = loader.options && loader.options[loader.id] || {};
    const deprecatedOptions = loader.deprecatedOptions && loader.deprecatedOptions[loader.id] || {};
    validateOptionsObject(idOptions, loader.id, loaderOptions, deprecatedOptions, loaders);
  }
}

function validateOptionsObject(options, id, defaultOptions, deprecatedOptions, loaders) {
  const loaderName = id || 'Top level';
  const prefix = id ? "".concat(id, ".") : '';

  for (const key in options) {
    const isSubOptions = !id && isObject(options[key]);
    const isBaseUriOption = key === 'baseUri' && !id;
    const isWorkerUrlOption = key === 'workerUrl' && id;

    if (!(key in defaultOptions) && !isBaseUriOption && !isWorkerUrlOption) {
      if (key in deprecatedOptions) {
        probeLog.warn("".concat(loaderName, " loader option '").concat(prefix).concat(key, "' no longer supported, use '").concat(deprecatedOptions[key], "'"))();
      } else if (!isSubOptions) {
        const suggestion = findSimilarOption(key, loaders);
        probeLog.warn("".concat(loaderName, " loader option '").concat(prefix).concat(key, "' not recognized. ").concat(suggestion))();
      }
    }
  }
}

function findSimilarOption(optionKey, loaders) {
  const lowerCaseOptionKey = optionKey.toLowerCase();
  let bestSuggestion = '';

  for (const loader of loaders) {
    for (const key in loader.options) {
      if (optionKey === key) {
        return "Did you mean '".concat(loader.id, ".").concat(key, "'?");
      }

      const lowerCaseKey = key.toLowerCase();
      const isPartialMatch = lowerCaseOptionKey.startsWith(lowerCaseKey) || lowerCaseKey.startsWith(lowerCaseOptionKey);

      if (isPartialMatch) {
        bestSuggestion = bestSuggestion || "Did you mean '".concat(loader.id, ".").concat(key, "'?");
      }
    }
  }

  return bestSuggestion;
}

function normalizeOptionsInternal(loader, options, url) {
  const loaderDefaultOptions = loader.options || {};
  const mergedOptions = { ...loaderDefaultOptions
  };
  addUrlOptions(mergedOptions, url);

  if (mergedOptions.log === null) {
    mergedOptions.log = new NullLog();
  }

  mergeNestedFields(mergedOptions, getGlobalLoaderOptions());
  mergeNestedFields(mergedOptions, options);
  return mergedOptions;
}

function mergeNestedFields(mergedOptions, options) {
  for (const key in options) {
    if (key in options) {
      const value = options[key];

      if (isPureObject(value) && isPureObject(mergedOptions[key])) {
        mergedOptions[key] = { ...mergedOptions[key],
          ...options[key]
        };
      } else {
        mergedOptions[key] = options[key];
      }
    }
  }
}

function addUrlOptions(options, url) {
  if (url && !('baseUri' in options)) {
    options.baseUri = url;
  }
}

function isLoaderObject(loader) {
  var _loader;

  if (!loader) {
    return false;
  }

  if (Array.isArray(loader)) {
    loader = loader[0];
  }

  const hasExtensions = Array.isArray((_loader = loader) === null || _loader === void 0 ? void 0 : _loader.extensions);
  return hasExtensions;
}
function normalizeLoader(loader) {
  var _loader2, _loader3;

  assert$7(loader, 'null loader');
  assert$7(isLoaderObject(loader), 'invalid loader');
  let options;

  if (Array.isArray(loader)) {
    options = loader[1];
    loader = loader[0];
    loader = { ...loader,
      options: { ...loader.options,
        ...options
      }
    };
  }

  if ((_loader2 = loader) !== null && _loader2 !== void 0 && _loader2.parseTextSync || (_loader3 = loader) !== null && _loader3 !== void 0 && _loader3.parseText) {
    loader.text = true;
  }

  if (!loader.text) {
    loader.binary = true;
  }

  return loader;
}

const getGlobalLoaderRegistry = () => {
  const state = getGlobalLoaderState();
  state.loaderRegistry = state.loaderRegistry || [];
  return state.loaderRegistry;
};
function getRegisteredLoaders() {
  return getGlobalLoaderRegistry();
}

const log = new Log({
  id: 'loaders.gl'
});

const EXT_PATTERN = /\.([^.]+)$/;
async function selectLoader(data, loaders = [], options, context) {
  if (!validHTTPResponse(data)) {
    return null;
  }

  let loader = selectLoaderSync(data, loaders, { ...options,
    nothrow: true
  }, context);

  if (loader) {
    return loader;
  }

  if (isBlob(data)) {
    data = await data.slice(0, 10).arrayBuffer();
    loader = selectLoaderSync(data, loaders, options, context);
  }

  if (!loader && !(options !== null && options !== void 0 && options.nothrow)) {
    throw new Error(getNoValidLoaderMessage(data));
  }

  return loader;
}
function selectLoaderSync(data, loaders = [], options, context) {
  if (!validHTTPResponse(data)) {
    return null;
  }

  if (loaders && !Array.isArray(loaders)) {
    return normalizeLoader(loaders);
  }

  let candidateLoaders = [];

  if (loaders) {
    candidateLoaders = candidateLoaders.concat(loaders);
  }

  if (!(options !== null && options !== void 0 && options.ignoreRegisteredLoaders)) {
    candidateLoaders.push(...getRegisteredLoaders());
  }

  normalizeLoaders(candidateLoaders);
  const loader = selectLoaderInternal(data, candidateLoaders, options, context);

  if (!loader && !(options !== null && options !== void 0 && options.nothrow)) {
    throw new Error(getNoValidLoaderMessage(data));
  }

  return loader;
}

function selectLoaderInternal(data, loaders, options, context) {
  const {
    url,
    type
  } = getResourceUrlAndType(data);
  const testUrl = url || (context === null || context === void 0 ? void 0 : context.url);
  let loader = null;
  let reason = '';

  if (options !== null && options !== void 0 && options.mimeType) {
    loader = findLoaderByMIMEType(loaders, options === null || options === void 0 ? void 0 : options.mimeType);
    reason = "match forced by supplied MIME type ".concat(options === null || options === void 0 ? void 0 : options.mimeType);
  }

  loader = loader || findLoaderByUrl(loaders, testUrl);
  reason = reason || (loader ? "matched url ".concat(testUrl) : '');
  loader = loader || findLoaderByMIMEType(loaders, type);
  reason = reason || (loader ? "matched MIME type ".concat(type) : '');
  loader = loader || findLoaderByInitialBytes(loaders, data);
  reason = reason || (loader ? "matched initial data ".concat(getFirstCharacters(data)) : '');
  loader = loader || findLoaderByMIMEType(loaders, options === null || options === void 0 ? void 0 : options.fallbackMimeType);
  reason = reason || (loader ? "matched fallback MIME type ".concat(type) : '');

  if (reason) {
    var _loader;

    log.log(1, "selectLoader selected ".concat((_loader = loader) === null || _loader === void 0 ? void 0 : _loader.name, ": ").concat(reason, "."));
  }

  return loader;
}

function validHTTPResponse(data) {
  if (data instanceof Response) {
    if (data.status === 204) {
      return false;
    }
  }

  return true;
}

function getNoValidLoaderMessage(data) {
  const {
    url,
    type
  } = getResourceUrlAndType(data);
  let message = 'No valid loader found (';
  message += url ? "".concat(filename(url), ", ") : 'no url provided, ';
  message += "MIME type: ".concat(type ? "\"".concat(type, "\"") : 'not provided', ", ");
  const firstCharacters = data ? getFirstCharacters(data) : '';
  message += firstCharacters ? " first bytes: \"".concat(firstCharacters, "\"") : 'first bytes: not available';
  message += ')';
  return message;
}

function normalizeLoaders(loaders) {
  for (const loader of loaders) {
    normalizeLoader(loader);
  }
}

function findLoaderByUrl(loaders, url) {
  const match = url && EXT_PATTERN.exec(url);
  const extension = match && match[1];
  return extension ? findLoaderByExtension(loaders, extension) : null;
}

function findLoaderByExtension(loaders, extension) {
  extension = extension.toLowerCase();

  for (const loader of loaders) {
    for (const loaderExtension of loader.extensions) {
      if (loaderExtension.toLowerCase() === extension) {
        return loader;
      }
    }
  }

  return null;
}

function findLoaderByMIMEType(loaders, mimeType) {
  for (const loader of loaders) {
    if (loader.mimeTypes && loader.mimeTypes.includes(mimeType)) {
      return loader;
    }

    if (mimeType === "application/x.".concat(loader.id)) {
      return loader;
    }
  }

  return null;
}

function findLoaderByInitialBytes(loaders, data) {
  if (!data) {
    return null;
  }

  for (const loader of loaders) {
    if (typeof data === 'string') {
      if (testDataAgainstText(data, loader)) {
        return loader;
      }
    } else if (ArrayBuffer.isView(data)) {
      if (testDataAgainstBinary(data.buffer, data.byteOffset, loader)) {
        return loader;
      }
    } else if (data instanceof ArrayBuffer) {
      const byteOffset = 0;

      if (testDataAgainstBinary(data, byteOffset, loader)) {
        return loader;
      }
    }
  }

  return null;
}

function testDataAgainstText(data, loader) {
  if (loader.testText) {
    return loader.testText(data);
  }

  const tests = Array.isArray(loader.tests) ? loader.tests : [loader.tests];
  return tests.some(test => data.startsWith(test));
}

function testDataAgainstBinary(data, byteOffset, loader) {
  const tests = Array.isArray(loader.tests) ? loader.tests : [loader.tests];
  return tests.some(test => testBinary(data, byteOffset, loader, test));
}

function testBinary(data, byteOffset, loader, test) {
  if (test instanceof ArrayBuffer) {
    return compareArrayBuffers(test, data, test.byteLength);
  }

  switch (typeof test) {
    case 'function':
      return test(data, loader);

    case 'string':
      const magic = getMagicString$2(data, byteOffset, test.length);
      return test === magic;

    default:
      return false;
  }
}

function getFirstCharacters(data, length = 5) {
  if (typeof data === 'string') {
    return data.slice(0, length);
  } else if (ArrayBuffer.isView(data)) {
    return getMagicString$2(data.buffer, data.byteOffset, length);
  } else if (data instanceof ArrayBuffer) {
    const byteOffset = 0;
    return getMagicString$2(data, byteOffset, length);
  }

  return '';
}

function getMagicString$2(arrayBuffer, byteOffset, length) {
  if (arrayBuffer.byteLength < byteOffset + length) {
    return '';
  }

  const dataView = new DataView(arrayBuffer);
  let magic = '';

  for (let i = 0; i < length; i++) {
    magic += String.fromCharCode(dataView.getUint8(byteOffset + i));
  }

  return magic;
}

const DEFAULT_CHUNK_SIZE$2 = 256 * 1024;
function* makeStringIterator(string, options) {
  const chunkSize = (options === null || options === void 0 ? void 0 : options.chunkSize) || DEFAULT_CHUNK_SIZE$2;
  let offset = 0;
  const textEncoder = new TextEncoder();

  while (offset < string.length) {
    const chunkLength = Math.min(string.length - offset, chunkSize);
    const chunk = string.slice(offset, offset + chunkLength);
    offset += chunkLength;
    yield textEncoder.encode(chunk);
  }
}

const DEFAULT_CHUNK_SIZE$1 = 256 * 1024;
function* makeArrayBufferIterator(arrayBuffer, options = {}) {
  const {
    chunkSize = DEFAULT_CHUNK_SIZE$1
  } = options;
  let byteOffset = 0;

  while (byteOffset < arrayBuffer.byteLength) {
    const chunkByteLength = Math.min(arrayBuffer.byteLength - byteOffset, chunkSize);
    const chunk = new ArrayBuffer(chunkByteLength);
    const sourceArray = new Uint8Array(arrayBuffer, byteOffset, chunkByteLength);
    const chunkArray = new Uint8Array(chunk);
    chunkArray.set(sourceArray);
    byteOffset += chunkByteLength;
    yield chunk;
  }
}

const DEFAULT_CHUNK_SIZE = 1024 * 1024;
async function* makeBlobIterator(blob, options) {
  const chunkSize = (options === null || options === void 0 ? void 0 : options.chunkSize) || DEFAULT_CHUNK_SIZE;
  let offset = 0;

  while (offset < blob.size) {
    const end = offset + chunkSize;
    const chunk = await blob.slice(offset, end).arrayBuffer();
    offset = end;
    yield chunk;
  }
}

function makeStreamIterator(stream, options) {
  return isBrowser$2 ? makeBrowserStreamIterator(stream, options) : makeNodeStreamIterator(stream);
}

async function* makeBrowserStreamIterator(stream, options) {
  const reader = stream.getReader();
  let nextBatchPromise;

  try {
    while (true) {
      const currentBatchPromise = nextBatchPromise || reader.read();

      if (options !== null && options !== void 0 && options._streamReadAhead) {
        nextBatchPromise = reader.read();
      }

      const {
        done,
        value
      } = await currentBatchPromise;

      if (done) {
        return;
      }

      yield toArrayBuffer(value);
    }
  } catch (error) {
    reader.releaseLock();
  }
}

async function* makeNodeStreamIterator(stream, options) {
  for await (const chunk of stream) {
    yield toArrayBuffer(chunk);
  }
}

function makeIterator(data, options) {
  if (typeof data === 'string') {
    return makeStringIterator(data, options);
  }

  if (data instanceof ArrayBuffer) {
    return makeArrayBufferIterator(data, options);
  }

  if (isBlob(data)) {
    return makeBlobIterator(data, options);
  }

  if (isReadableStream(data)) {
    return makeStreamIterator(data, options);
  }

  if (isResponse(data)) {
    const response = data;
    return makeStreamIterator(response.body, options);
  }

  throw new Error('makeIterator');
}

const ERR_DATA = 'Cannot convert supplied data type';
function getArrayBufferOrStringFromDataSync(data, loader, options) {
  if (loader.text && typeof data === 'string') {
    return data;
  }

  if (isBuffer(data)) {
    data = data.buffer;
  }

  if (data instanceof ArrayBuffer) {
    const arrayBuffer = data;

    if (loader.text && !loader.binary) {
      const textDecoder = new TextDecoder('utf8');
      return textDecoder.decode(arrayBuffer);
    }

    return arrayBuffer;
  }

  if (ArrayBuffer.isView(data)) {
    if (loader.text && !loader.binary) {
      const textDecoder = new TextDecoder('utf8');
      return textDecoder.decode(data);
    }

    let arrayBuffer = data.buffer;
    const byteLength = data.byteLength || data.length;

    if (data.byteOffset !== 0 || byteLength !== arrayBuffer.byteLength) {
      arrayBuffer = arrayBuffer.slice(data.byteOffset, data.byteOffset + byteLength);
    }

    return arrayBuffer;
  }

  throw new Error(ERR_DATA);
}
async function getArrayBufferOrStringFromData(data, loader, options) {
  const isArrayBuffer = data instanceof ArrayBuffer || ArrayBuffer.isView(data);

  if (typeof data === 'string' || isArrayBuffer) {
    return getArrayBufferOrStringFromDataSync(data, loader);
  }

  if (isBlob(data)) {
    data = await makeResponse(data);
  }

  if (isResponse(data)) {
    const response = data;
    await checkResponse(response);
    return loader.binary ? await response.arrayBuffer() : await response.text();
  }

  if (isReadableStream(data)) {
    data = makeIterator(data, options);
  }

  if (isIterable(data) || isAsyncIterable(data)) {
    return concatenateArrayBuffersAsync(data);
  }

  throw new Error(ERR_DATA);
}

function getLoaderContext(context, options, previousContext = null) {
  if (previousContext) {
    return previousContext;
  }

  const resolvedContext = {
    fetch: getFetchFunction(options, context),
    ...context
  };

  if (!Array.isArray(resolvedContext.loaders)) {
    resolvedContext.loaders = null;
  }

  return resolvedContext;
}
function getLoadersFromContext(loaders, context) {
  if (!context && loaders && !Array.isArray(loaders)) {
    return loaders;
  }

  let candidateLoaders;

  if (loaders) {
    candidateLoaders = Array.isArray(loaders) ? loaders : [loaders];
  }

  if (context && context.loaders) {
    const contextLoaders = Array.isArray(context.loaders) ? context.loaders : [context.loaders];
    candidateLoaders = candidateLoaders ? [...candidateLoaders, ...contextLoaders] : contextLoaders;
  }

  return candidateLoaders && candidateLoaders.length ? candidateLoaders : null;
}

async function parse$3(data, loaders, options, context) {
  assert$6(!context || typeof context === 'object');

  if (loaders && !Array.isArray(loaders) && !isLoaderObject(loaders)) {
    context = undefined;
    options = loaders;
    loaders = undefined;
  }

  data = await data;
  options = options || {};
  const {
    url
  } = getResourceUrlAndType(data);
  const typedLoaders = loaders;
  const candidateLoaders = getLoadersFromContext(typedLoaders, context);
  const loader = await selectLoader(data, candidateLoaders, options);

  if (!loader) {
    return null;
  }

  options = normalizeOptions(options, loader, candidateLoaders, url);
  context = getLoaderContext({
    url,
    parse: parse$3,
    loaders: candidateLoaders
  }, options, context);
  return await parseWithLoader(loader, data, options, context);
}

async function parseWithLoader(loader, data, options, context) {
  validateWorkerVersion(loader);

  if (isResponse(data)) {
    const response = data;
    const {
      ok,
      redirected,
      status,
      statusText,
      type,
      url
    } = response;
    const headers = Object.fromEntries(response.headers.entries());
    context.response = {
      headers,
      ok,
      redirected,
      status,
      statusText,
      type,
      url
    };
  }

  data = await getArrayBufferOrStringFromData(data, loader, options);

  if (loader.parseTextSync && typeof data === 'string') {
    options.dataType = 'text';
    return loader.parseTextSync(data, options, context, loader);
  }

  if (canParseWithWorker(loader, options)) {
    return await parseWithWorker(loader, data, options, context, parse$3);
  }

  if (loader.parseText && typeof data === 'string') {
    return await loader.parseText(data, options, context, loader);
  }

  if (loader.parse) {
    return await loader.parse(data, options, context, loader);
  }

  assert$6(!loader.parseSync);
  throw new Error("".concat(loader.id, " loader - no parser found and worker is disabled"));
}

async function load(url, loaders, options, context) {
  if (!Array.isArray(loaders) && !isLoaderObject(loaders)) {
    options = loaders;
    loaders = undefined;
  }

  const fetch = getFetchFunction(options);
  let data = url;

  if (typeof url === 'string') {
    data = await fetch(url);
  }

  if (isBlob(url)) {
    data = await fetch(url);
  }

  return await parse$3(data, loaders, options);
}

function assert$4(condition, message) {
  if (!condition) {
    throw new Error("math.gl assertion ".concat(message));
  }
}

const RADIANS_TO_DEGREES = 1 / Math.PI * 180;
const DEGREES_TO_RADIANS = 1 / 180 * Math.PI;
const config = {
  EPSILON: 1e-12,
  debug: false,
  precision: 4,
  printTypes: false,
  printDegrees: false,
  printRowMajor: true
};
function formatValue(value, {
  precision = config.precision
} = {}) {
  value = round(value);
  return "".concat(parseFloat(value.toPrecision(precision)));
}
function isArray(value) {
  return Array.isArray(value) || ArrayBuffer.isView(value) && !(value instanceof DataView);
}
function toRadians(degrees) {
  return radians(degrees);
}
function toDegrees(radians) {
  return degrees(radians);
}
function radians(degrees, result) {
  return map(degrees, degrees => degrees * DEGREES_TO_RADIANS, result);
}
function degrees(radians, result) {
  return map(radians, radians => radians * RADIANS_TO_DEGREES, result);
}
function clamp(value, min, max) {
  return map(value, value => Math.max(min, Math.min(max, value)));
}
function equals(a, b, epsilon) {
  const oldEpsilon = config.EPSILON;

  if (epsilon) {
    config.EPSILON = epsilon;
  }

  try {
    if (a === b) {
      return true;
    }

    if (isArray(a) && isArray(b)) {
      if (a.length !== b.length) {
        return false;
      }

      for (let i = 0; i < a.length; ++i) {
        if (!equals(a[i], b[i])) {
          return false;
        }
      }

      return true;
    }

    if (a && a.equals) {
      return a.equals(b);
    }

    if (b && b.equals) {
      return b.equals(a);
    }

    if (typeof a === 'number' && typeof b === 'number') {
      return Math.abs(a - b) <= config.EPSILON * Math.max(1, Math.abs(a), Math.abs(b));
    }

    return false;
  } finally {
    config.EPSILON = oldEpsilon;
  }
}

function round(value) {
  return Math.round(value / config.EPSILON) * config.EPSILON;
}

function duplicateArray(array) {
  return array.clone ? array.clone() : new Array(array.length);
}

function map(value, func, result) {
  if (isArray(value)) {
    const array = value;
    result = result || duplicateArray(array);

    for (let i = 0; i < result.length && i < array.length; ++i) {
      result[i] = func(value[i], i, result);
    }

    return result;
  }

  return func(value);
}

function _extendableBuiltin(cls) {
  function ExtendableBuiltin() {
    var instance = Reflect.construct(cls, Array.from(arguments));
    Object.setPrototypeOf(instance, Object.getPrototypeOf(this));
    return instance;
  }

  ExtendableBuiltin.prototype = Object.create(cls.prototype, {
    constructor: {
      value: cls,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });

  if (Object.setPrototypeOf) {
    Object.setPrototypeOf(ExtendableBuiltin, cls);
  } else {
    ExtendableBuiltin.__proto__ = cls;
  }

  return ExtendableBuiltin;
}
class MathArray extends _extendableBuiltin(Array) {
  clone() {
    return new this.constructor().copy(this);
  }

  fromArray(array, offset = 0) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = array[i + offset];
    }

    return this.check();
  }

  toArray(targetArray = [], offset = 0) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      targetArray[offset + i] = this[i];
    }

    return targetArray;
  }

  from(arrayOrObject) {
    return Array.isArray(arrayOrObject) ? this.copy(arrayOrObject) : this.fromObject(arrayOrObject);
  }

  to(arrayOrObject) {
    if (arrayOrObject === this) {
      return this;
    }

    return isArray(arrayOrObject) ? this.toArray(arrayOrObject) : this.toObject(arrayOrObject);
  }

  toTarget(target) {
    return target ? this.to(target) : this;
  }

  toFloat32Array() {
    return new Float32Array(this);
  }

  toString() {
    return this.formatString(config);
  }

  formatString(opts) {
    let string = '';

    for (let i = 0; i < this.ELEMENTS; ++i) {
      string += (i > 0 ? ', ' : '') + formatValue(this[i], opts);
    }

    return "".concat(opts.printTypes ? this.constructor.name : '', "[").concat(string, "]");
  }

  equals(array) {
    if (!array || this.length !== array.length) {
      return false;
    }

    for (let i = 0; i < this.ELEMENTS; ++i) {
      if (!equals(this[i], array[i])) {
        return false;
      }
    }

    return true;
  }

  exactEquals(array) {
    if (!array || this.length !== array.length) {
      return false;
    }

    for (let i = 0; i < this.ELEMENTS; ++i) {
      if (this[i] !== array[i]) {
        return false;
      }
    }

    return true;
  }

  negate() {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = -this[i];
    }

    return this.check();
  }

  lerp(a, b, t) {
    if (t === undefined) {
      return this.lerp(this, a, b);
    }

    for (let i = 0; i < this.ELEMENTS; ++i) {
      const ai = a[i];
      this[i] = ai + t * (b[i] - ai);
    }

    return this.check();
  }

  min(vector) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = Math.min(vector[i], this[i]);
    }

    return this.check();
  }

  max(vector) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = Math.max(vector[i], this[i]);
    }

    return this.check();
  }

  clamp(minVector, maxVector) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = Math.min(Math.max(this[i], minVector[i]), maxVector[i]);
    }

    return this.check();
  }

  add(...vectors) {
    for (const vector of vectors) {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] += vector[i];
      }
    }

    return this.check();
  }

  subtract(...vectors) {
    for (const vector of vectors) {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] -= vector[i];
      }
    }

    return this.check();
  }

  scale(scale) {
    if (typeof scale === 'number') {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] *= scale;
      }
    } else {
      for (let i = 0; i < this.ELEMENTS && i < scale.length; ++i) {
        this[i] *= scale[i];
      }
    }

    return this.check();
  }

  multiplyByScalar(scalar) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] *= scalar;
    }

    return this.check();
  }

  check() {
    if (config.debug && !this.validate()) {
      throw new Error("math.gl: ".concat(this.constructor.name, " some fields set to invalid numbers'"));
    }

    return this;
  }

  validate() {
    let valid = this.length === this.ELEMENTS;

    for (let i = 0; i < this.ELEMENTS; ++i) {
      valid = valid && Number.isFinite(this[i]);
    }

    return valid;
  }

  sub(a) {
    return this.subtract(a);
  }

  setScalar(a) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = a;
    }

    return this.check();
  }

  addScalar(a) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] += a;
    }

    return this.check();
  }

  subScalar(a) {
    return this.addScalar(-a);
  }

  multiplyScalar(scalar) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] *= scalar;
    }

    return this.check();
  }

  divideScalar(a) {
    return this.multiplyByScalar(1 / a);
  }

  clampScalar(min, max) {
    for (let i = 0; i < this.ELEMENTS; ++i) {
      this[i] = Math.min(Math.max(this[i], min), max);
    }

    return this.check();
  }

  get elements() {
    return this;
  }

}

function validateVector(v, length) {
  if (v.length !== length) {
    return false;
  }

  for (let i = 0; i < v.length; ++i) {
    if (!Number.isFinite(v[i])) {
      return false;
    }
  }

  return true;
}
function checkNumber(value) {
  if (!Number.isFinite(value)) {
    throw new Error("Invalid number ".concat(value));
  }

  return value;
}
function checkVector(v, length, callerName = '') {
  if (config.debug && !validateVector(v, length)) {
    throw new Error("math.gl: ".concat(callerName, " some fields set to invalid numbers'"));
  }

  return v;
}

class Vector extends MathArray {
  get x() {
    return this[0];
  }

  set x(value) {
    this[0] = checkNumber(value);
  }

  get y() {
    return this[1];
  }

  set y(value) {
    this[1] = checkNumber(value);
  }

  len() {
    return Math.sqrt(this.lengthSquared());
  }

  magnitude() {
    return this.len();
  }

  lengthSquared() {
    let length = 0;

    for (let i = 0; i < this.ELEMENTS; ++i) {
      length += this[i] * this[i];
    }

    return length;
  }

  magnitudeSquared() {
    return this.lengthSquared();
  }

  distance(mathArray) {
    return Math.sqrt(this.distanceSquared(mathArray));
  }

  distanceSquared(mathArray) {
    let length = 0;

    for (let i = 0; i < this.ELEMENTS; ++i) {
      const dist = this[i] - mathArray[i];
      length += dist * dist;
    }

    return checkNumber(length);
  }

  dot(mathArray) {
    let product = 0;

    for (let i = 0; i < this.ELEMENTS; ++i) {
      product += this[i] * mathArray[i];
    }

    return checkNumber(product);
  }

  normalize() {
    const length = this.magnitude();

    if (length !== 0) {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] /= length;
      }
    }

    return this.check();
  }

  multiply(...vectors) {
    for (const vector of vectors) {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] *= vector[i];
      }
    }

    return this.check();
  }

  divide(...vectors) {
    for (const vector of vectors) {
      for (let i = 0; i < this.ELEMENTS; ++i) {
        this[i] /= vector[i];
      }
    }

    return this.check();
  }

  lengthSq() {
    return this.lengthSquared();
  }

  distanceTo(vector) {
    return this.distance(vector);
  }

  distanceToSquared(vector) {
    return this.distanceSquared(vector);
  }

  getComponent(i) {
    assert$4(i >= 0 && i < this.ELEMENTS, 'index is out of range');
    return checkNumber(this[i]);
  }

  setComponent(i, value) {
    assert$4(i >= 0 && i < this.ELEMENTS, 'index is out of range');
    this[i] = value;
    return this.check();
  }

  addVectors(a, b) {
    return this.copy(a).add(b);
  }

  subVectors(a, b) {
    return this.copy(a).subtract(b);
  }

  multiplyVectors(a, b) {
    return this.copy(a).multiply(b);
  }

  addScaledVector(a, b) {
    return this.add(new this.constructor(a).multiplyScalar(b));
  }

}

/**
 * Common utilities
 * @module glMatrix
 */
// Configuration Constants
var EPSILON = 0.000001;
var ARRAY_TYPE = typeof Float32Array !== 'undefined' ? Float32Array : Array;
if (!Math.hypot) Math.hypot = function () {
  var y = 0,
      i = arguments.length;

  while (i--) {
    y += arguments[i] * arguments[i];
  }

  return Math.sqrt(y);
};

/**
 * 2 Dimensional Vector
 * @module vec2
 */

/**
 * Creates a new, empty vec2
 *
 * @returns {vec2} a new 2D vector
 */

function create$4() {
  var out = new ARRAY_TYPE(2);

  if (ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
  }

  return out;
}
/**
 * Transforms the vec2 with a mat2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat2} m matrix to transform with
 * @returns {vec2} out
 */

function transformMat2(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[2] * y;
  out[1] = m[1] * x + m[3] * y;
  return out;
}
/**
 * Transforms the vec2 with a mat2d
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat2d} m matrix to transform with
 * @returns {vec2} out
 */

function transformMat2d(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[2] * y + m[4];
  out[1] = m[1] * x + m[3] * y + m[5];
  return out;
}
/**
 * Transforms the vec2 with a mat3
 * 3rd vector component is implicitly '1'
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat3} m matrix to transform with
 * @returns {vec2} out
 */

function transformMat3$1(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[3] * y + m[6];
  out[1] = m[1] * x + m[4] * y + m[7];
  return out;
}
/**
 * Transforms the vec2 with a mat4
 * 3rd vector component is implicitly '0'
 * 4th vector component is implicitly '1'
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec2} out
 */

function transformMat4$2(out, a, m) {
  var x = a[0];
  var y = a[1];
  out[0] = m[0] * x + m[4] * y + m[12];
  out[1] = m[1] * x + m[5] * y + m[13];
  return out;
}
/**
 * Perform some operation over an array of vec2s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec2. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec2s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

(function () {
  var vec = create$4();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 2;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
    }

    return a;
  };
})();

function vec2_transformMat4AsVector(out, a, m) {
  const x = a[0];
  const y = a[1];
  const w = m[3] * x + m[7] * y || 1.0;
  out[0] = (m[0] * x + m[4] * y) / w;
  out[1] = (m[1] * x + m[5] * y) / w;
  return out;
}
function vec3_transformMat4AsVector(out, a, m) {
  const x = a[0];
  const y = a[1];
  const z = a[2];
  const w = m[3] * x + m[7] * y + m[11] * z || 1.0;
  out[0] = (m[0] * x + m[4] * y + m[8] * z) / w;
  out[1] = (m[1] * x + m[5] * y + m[9] * z) / w;
  out[2] = (m[2] * x + m[6] * y + m[10] * z) / w;
  return out;
}
function vec3_transformMat2(out, a, m) {
  const x = a[0];
  const y = a[1];
  out[0] = m[0] * x + m[2] * y;
  out[1] = m[1] * x + m[3] * y;
  out[2] = a[2];
  return out;
}
function vec4_transformMat2(out, a, m) {
  const x = a[0];
  const y = a[1];
  out[0] = m[0] * x + m[2] * y;
  out[1] = m[1] * x + m[3] * y;
  out[2] = a[2];
  out[3] = a[3];
  return out;
}
function vec4_transformMat3(out, a, m) {
  const x = a[0];
  const y = a[1];
  const z = a[2];
  out[0] = m[0] * x + m[3] * y + m[6] * z;
  out[1] = m[1] * x + m[4] * y + m[7] * z;
  out[2] = m[2] * x + m[5] * y + m[8] * z;
  out[3] = a[3];
  return out;
}

class Vector2 extends Vector {
  constructor(x = 0, y = 0) {
    super(2);

    if (isArray(x) && arguments.length === 1) {
      this.copy(x);
    } else {
      if (config.debug) {
        checkNumber(x);
        checkNumber(y);
      }

      this[0] = x;
      this[1] = y;
    }
  }

  set(x, y) {
    this[0] = x;
    this[1] = y;
    return this.check();
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    return this.check();
  }

  fromObject(object) {
    if (config.debug) {
      checkNumber(object.x);
      checkNumber(object.y);
    }

    this[0] = object.x;
    this[1] = object.y;
    return this.check();
  }

  toObject(object) {
    object.x = this[0];
    object.y = this[1];
    return object;
  }

  get ELEMENTS() {
    return 2;
  }

  horizontalAngle() {
    return Math.atan2(this.y, this.x);
  }

  verticalAngle() {
    return Math.atan2(this.x, this.y);
  }

  transform(matrix4) {
    return this.transformAsPoint(matrix4);
  }

  transformAsPoint(matrix4) {
    transformMat4$2(this, this, matrix4);
    return this.check();
  }

  transformAsVector(matrix4) {
    vec2_transformMat4AsVector(this, this, matrix4);
    return this.check();
  }

  transformByMatrix3(matrix3) {
    transformMat3$1(this, this, matrix3);
    return this.check();
  }

  transformByMatrix2x3(matrix2x3) {
    transformMat2d(this, this, matrix2x3);
    return this.check();
  }

  transformByMatrix2(matrix2) {
    transformMat2(this, this, matrix2);
    return this.check();
  }

}

/**
 * 3 Dimensional Vector
 * @module vec3
 */

/**
 * Creates a new, empty vec3
 *
 * @returns {vec3} a new 3D vector
 */

function create$3() {
  var out = new ARRAY_TYPE(3);

  if (ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
  }

  return out;
}
/**
 * Calculates the length of a vec3
 *
 * @param {ReadonlyVec3} a vector to calculate length of
 * @returns {Number} length of a
 */

function length$2(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  return Math.hypot(x, y, z);
}
/**
 * Creates a new vec3 initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @returns {vec3} a new 3D vector
 */

function fromValues(x, y, z) {
  var out = new ARRAY_TYPE(3);
  out[0] = x;
  out[1] = y;
  out[2] = z;
  return out;
}
/**
 * Normalize a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to normalize
 * @returns {vec3} out
 */

function normalize$2(out, a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var len = x * x + y * y + z * z;

  if (len > 0) {
    //TODO: evaluate use of glm_invsqrt here?
    len = 1 / Math.sqrt(len);
  }

  out[0] = a[0] * len;
  out[1] = a[1] * len;
  out[2] = a[2] * len;
  return out;
}
/**
 * Calculates the dot product of two vec3's
 *
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {Number} dot product of a and b
 */

function dot$2(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
/**
 * Computes the cross product of two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */

function cross(out, a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2];
  var bx = b[0],
      by = b[1],
      bz = b[2];
  out[0] = ay * bz - az * by;
  out[1] = az * bx - ax * bz;
  out[2] = ax * by - ay * bx;
  return out;
}
/**
 * Transforms the vec3 with a mat4.
 * 4th vector component is implicitly '1'
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec3} out
 */

function transformMat4$1(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2];
  var w = m[3] * x + m[7] * y + m[11] * z + m[15];
  w = w || 1.0;
  out[0] = (m[0] * x + m[4] * y + m[8] * z + m[12]) / w;
  out[1] = (m[1] * x + m[5] * y + m[9] * z + m[13]) / w;
  out[2] = (m[2] * x + m[6] * y + m[10] * z + m[14]) / w;
  return out;
}
/**
 * Transforms the vec3 with a mat3.
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyMat3} m the 3x3 matrix to transform with
 * @returns {vec3} out
 */

function transformMat3(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2];
  out[0] = x * m[0] + y * m[3] + z * m[6];
  out[1] = x * m[1] + y * m[4] + z * m[7];
  out[2] = x * m[2] + y * m[5] + z * m[8];
  return out;
}
/**
 * Transforms the vec3 with a quat
 * Can also be used for dual quaternions. (Multiply it with the real part)
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyQuat} q quaternion to transform with
 * @returns {vec3} out
 */

function transformQuat$1(out, a, q) {
  // benchmarks: https://jsperf.com/quaternion-transform-vec3-implementations-fixed
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3];
  var x = a[0],
      y = a[1],
      z = a[2]; // var qvec = [qx, qy, qz];
  // var uv = vec3.cross([], qvec, a);

  var uvx = qy * z - qz * y,
      uvy = qz * x - qx * z,
      uvz = qx * y - qy * x; // var uuv = vec3.cross([], qvec, uv);

  var uuvx = qy * uvz - qz * uvy,
      uuvy = qz * uvx - qx * uvz,
      uuvz = qx * uvy - qy * uvx; // vec3.scale(uv, uv, 2 * w);

  var w2 = qw * 2;
  uvx *= w2;
  uvy *= w2;
  uvz *= w2; // vec3.scale(uuv, uuv, 2);

  uuvx *= 2;
  uuvy *= 2;
  uuvz *= 2; // return vec3.add(out, a, vec3.add(out, uv, uuv));

  out[0] = x + uvx + uuvx;
  out[1] = y + uvy + uuvy;
  out[2] = z + uvz + uuvz;
  return out;
}
/**
 * Rotate a 3D vector around the x-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */

function rotateX$2(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[0];
  r[1] = p[1] * Math.cos(rad) - p[2] * Math.sin(rad);
  r[2] = p[1] * Math.sin(rad) + p[2] * Math.cos(rad); //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Rotate a 3D vector around the y-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */

function rotateY$2(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[2] * Math.sin(rad) + p[0] * Math.cos(rad);
  r[1] = p[1];
  r[2] = p[2] * Math.cos(rad) - p[0] * Math.sin(rad); //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Rotate a 3D vector around the z-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */

function rotateZ$2(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[0] * Math.cos(rad) - p[1] * Math.sin(rad);
  r[1] = p[0] * Math.sin(rad) + p[1] * Math.cos(rad);
  r[2] = p[2]; //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Get the angle between two 3D vectors
 * @param {ReadonlyVec3} a The first operand
 * @param {ReadonlyVec3} b The second operand
 * @returns {Number} The angle in radians
 */

function angle(a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2],
      bx = b[0],
      by = b[1],
      bz = b[2],
      mag1 = Math.sqrt(ax * ax + ay * ay + az * az),
      mag2 = Math.sqrt(bx * bx + by * by + bz * bz),
      mag = mag1 * mag2,
      cosine = mag && dot$2(a, b) / mag;
  return Math.acos(Math.min(Math.max(cosine, -1), 1));
}
/**
 * Alias for {@link vec3.length}
 * @function
 */

var len = length$2;
/**
 * Perform some operation over an array of vec3s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec3. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec3s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

(function () {
  var vec = create$3();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 3;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      vec[2] = a[i + 2];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
      a[i + 2] = vec[2];
    }

    return a;
  };
})();

const ORIGIN = [0, 0, 0];
let ZERO$2;
class Vector3 extends Vector {
  static get ZERO() {
    if (!ZERO$2) {
      ZERO$2 = new Vector3(0, 0, 0);
      Object.freeze(ZERO$2);
    }

    return ZERO$2;
  }

  constructor(x = 0, y = 0, z = 0) {
    super(-0, -0, -0);

    if (arguments.length === 1 && isArray(x)) {
      this.copy(x);
    } else {
      if (config.debug) {
        checkNumber(x);
        checkNumber(y);
        checkNumber(z);
      }

      this[0] = x;
      this[1] = y;
      this[2] = z;
    }
  }

  set(x, y, z) {
    this[0] = x;
    this[1] = y;
    this[2] = z;
    return this.check();
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    this[2] = array[2];
    return this.check();
  }

  fromObject(object) {
    if (config.debug) {
      checkNumber(object.x);
      checkNumber(object.y);
      checkNumber(object.z);
    }

    this[0] = object.x;
    this[1] = object.y;
    this[2] = object.z;
    return this.check();
  }

  toObject(object) {
    object.x = this[0];
    object.y = this[1];
    object.z = this[2];
    return object;
  }

  get ELEMENTS() {
    return 3;
  }

  get z() {
    return this[2];
  }

  set z(value) {
    this[2] = checkNumber(value);
  }

  angle(vector) {
    return angle(this, vector);
  }

  cross(vector) {
    cross(this, this, vector);
    return this.check();
  }

  rotateX({
    radians,
    origin = ORIGIN
  }) {
    rotateX$2(this, this, origin, radians);
    return this.check();
  }

  rotateY({
    radians,
    origin = ORIGIN
  }) {
    rotateY$2(this, this, origin, radians);
    return this.check();
  }

  rotateZ({
    radians,
    origin = ORIGIN
  }) {
    rotateZ$2(this, this, origin, radians);
    return this.check();
  }

  transform(matrix4) {
    return this.transformAsPoint(matrix4);
  }

  transformAsPoint(matrix4) {
    transformMat4$1(this, this, matrix4);
    return this.check();
  }

  transformAsVector(matrix4) {
    vec3_transformMat4AsVector(this, this, matrix4);
    return this.check();
  }

  transformByMatrix3(matrix3) {
    transformMat3(this, this, matrix3);
    return this.check();
  }

  transformByMatrix2(matrix2) {
    vec3_transformMat2(this, this, matrix2);
    return this.check();
  }

  transformByQuaternion(quaternion) {
    transformQuat$1(this, this, quaternion);
    return this.check();
  }

}

let ZERO$1;
class Vector4 extends Vector {
  static get ZERO() {
    if (!ZERO$1) {
      ZERO$1 = new Vector4(0, 0, 0, 0);
      Object.freeze(ZERO$1);
    }

    return ZERO$1;
  }

  constructor(x = 0, y = 0, z = 0, w = 0) {
    super(-0, -0, -0, -0);

    if (isArray(x) && arguments.length === 1) {
      this.copy(x);
    } else {
      if (config.debug) {
        checkNumber(x);
        checkNumber(y);
        checkNumber(z);
        checkNumber(w);
      }

      this[0] = x;
      this[1] = y;
      this[2] = z;
      this[3] = w;
    }
  }

  set(x, y, z, w) {
    this[0] = x;
    this[1] = y;
    this[2] = z;
    this[3] = w;
    return this.check();
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    this[2] = array[2];
    this[3] = array[3];
    return this.check();
  }

  fromObject(object) {
    if (config.debug) {
      checkNumber(object.x);
      checkNumber(object.y);
      checkNumber(object.z);
      checkNumber(object.w);
    }

    this[0] = object.x;
    this[1] = object.y;
    this[2] = object.z;
    this[3] = object.w;
    return this;
  }

  toObject(object) {
    object.x = this[0];
    object.y = this[1];
    object.z = this[2];
    object.w = this[3];
    return object;
  }

  get ELEMENTS() {
    return 4;
  }

  get z() {
    return this[2];
  }

  set z(value) {
    this[2] = checkNumber(value);
  }

  get w() {
    return this[3];
  }

  set w(value) {
    this[3] = checkNumber(value);
  }

  transform(matrix4) {
    transformMat4$1(this, this, matrix4);
    return this.check();
  }

  transformByMatrix3(matrix3) {
    vec4_transformMat3(this, this, matrix3);
    return this.check();
  }

  transformByMatrix2(matrix2) {
    vec4_transformMat2(this, this, matrix2);
    return this.check();
  }

  transformByQuaternion(quaternion) {
    transformQuat$1(this, this, quaternion);
    return this.check();
  }

  applyMatrix4(m) {
    m.transform(this, this);
    return this;
  }

}

class Matrix extends MathArray {
  toString() {
    let string = '[';

    if (config.printRowMajor) {
      string += 'row-major:';

      for (let row = 0; row < this.RANK; ++row) {
        for (let col = 0; col < this.RANK; ++col) {
          string += " ".concat(this[col * this.RANK + row]);
        }
      }
    } else {
      string += 'column-major:';

      for (let i = 0; i < this.ELEMENTS; ++i) {
        string += " ".concat(this[i]);
      }
    }

    string += ']';
    return string;
  }

  getElementIndex(row, col) {
    return col * this.RANK + row;
  }

  getElement(row, col) {
    return this[col * this.RANK + row];
  }

  setElement(row, col, value) {
    this[col * this.RANK + row] = checkNumber(value);
    return this;
  }

  getColumn(columnIndex, result = new Array(this.RANK).fill(-0)) {
    const firstIndex = columnIndex * this.RANK;

    for (let i = 0; i < this.RANK; ++i) {
      result[i] = this[firstIndex + i];
    }

    return result;
  }

  setColumn(columnIndex, columnVector) {
    const firstIndex = columnIndex * this.RANK;

    for (let i = 0; i < this.RANK; ++i) {
      this[firstIndex + i] = columnVector[i];
    }

    return this;
  }

}

/**
 * 3x3 Matrix
 * @module mat3
 */

/**
 * Creates a new identity mat3
 *
 * @returns {mat3} a new 3x3 matrix
 */

function create$2() {
  var out = new ARRAY_TYPE(9);

  if (ARRAY_TYPE != Float32Array) {
    out[1] = 0;
    out[2] = 0;
    out[3] = 0;
    out[5] = 0;
    out[6] = 0;
    out[7] = 0;
  }

  out[0] = 1;
  out[4] = 1;
  out[8] = 1;
  return out;
}
/**
 * Transpose the values of a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */

function transpose$1(out, a) {
  // If we are transposing ourselves we can skip a few steps but have to cache some values
  if (out === a) {
    var a01 = a[1],
        a02 = a[2],
        a12 = a[5];
    out[1] = a[3];
    out[2] = a[6];
    out[3] = a01;
    out[5] = a[7];
    out[6] = a02;
    out[7] = a12;
  } else {
    out[0] = a[0];
    out[1] = a[3];
    out[2] = a[6];
    out[3] = a[1];
    out[4] = a[4];
    out[5] = a[7];
    out[6] = a[2];
    out[7] = a[5];
    out[8] = a[8];
  }

  return out;
}
/**
 * Inverts a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */

function invert$2(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  var b01 = a22 * a11 - a12 * a21;
  var b11 = -a22 * a10 + a12 * a20;
  var b21 = a21 * a10 - a11 * a20; // Calculate the determinant

  var det = a00 * b01 + a01 * b11 + a02 * b21;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = b01 * det;
  out[1] = (-a22 * a01 + a02 * a21) * det;
  out[2] = (a12 * a01 - a02 * a11) * det;
  out[3] = b11 * det;
  out[4] = (a22 * a00 - a02 * a20) * det;
  out[5] = (-a12 * a00 + a02 * a10) * det;
  out[6] = b21 * det;
  out[7] = (-a21 * a00 + a01 * a20) * det;
  out[8] = (a11 * a00 - a01 * a10) * det;
  return out;
}
/**
 * Calculates the determinant of a mat3
 *
 * @param {ReadonlyMat3} a the source matrix
 * @returns {Number} determinant of a
 */

function determinant$1(a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  return a00 * (a22 * a11 - a12 * a21) + a01 * (-a22 * a10 + a12 * a20) + a02 * (a21 * a10 - a11 * a20);
}
/**
 * Multiplies two mat3's
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the first operand
 * @param {ReadonlyMat3} b the second operand
 * @returns {mat3} out
 */

function multiply$2(out, a, b) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  var b00 = b[0],
      b01 = b[1],
      b02 = b[2];
  var b10 = b[3],
      b11 = b[4],
      b12 = b[5];
  var b20 = b[6],
      b21 = b[7],
      b22 = b[8];
  out[0] = b00 * a00 + b01 * a10 + b02 * a20;
  out[1] = b00 * a01 + b01 * a11 + b02 * a21;
  out[2] = b00 * a02 + b01 * a12 + b02 * a22;
  out[3] = b10 * a00 + b11 * a10 + b12 * a20;
  out[4] = b10 * a01 + b11 * a11 + b12 * a21;
  out[5] = b10 * a02 + b11 * a12 + b12 * a22;
  out[6] = b20 * a00 + b21 * a10 + b22 * a20;
  out[7] = b20 * a01 + b21 * a11 + b22 * a21;
  out[8] = b20 * a02 + b21 * a12 + b22 * a22;
  return out;
}
/**
 * Translate a mat3 by the given vector
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to translate
 * @param {ReadonlyVec2} v vector to translate by
 * @returns {mat3} out
 */

function translate$1(out, a, v) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a10 = a[3],
      a11 = a[4],
      a12 = a[5],
      a20 = a[6],
      a21 = a[7],
      a22 = a[8],
      x = v[0],
      y = v[1];
  out[0] = a00;
  out[1] = a01;
  out[2] = a02;
  out[3] = a10;
  out[4] = a11;
  out[5] = a12;
  out[6] = x * a00 + y * a10 + a20;
  out[7] = x * a01 + y * a11 + a21;
  out[8] = x * a02 + y * a12 + a22;
  return out;
}
/**
 * Rotates a mat3 by the given angle
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat3} out
 */

function rotate$1(out, a, rad) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a10 = a[3],
      a11 = a[4],
      a12 = a[5],
      a20 = a[6],
      a21 = a[7],
      a22 = a[8],
      s = Math.sin(rad),
      c = Math.cos(rad);
  out[0] = c * a00 + s * a10;
  out[1] = c * a01 + s * a11;
  out[2] = c * a02 + s * a12;
  out[3] = c * a10 - s * a00;
  out[4] = c * a11 - s * a01;
  out[5] = c * a12 - s * a02;
  out[6] = a20;
  out[7] = a21;
  out[8] = a22;
  return out;
}
/**
 * Scales the mat3 by the dimensions in the given vec2
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to rotate
 * @param {ReadonlyVec2} v the vec2 to scale the matrix by
 * @returns {mat3} out
 **/

function scale$3(out, a, v) {
  var x = v[0],
      y = v[1];
  out[0] = x * a[0];
  out[1] = x * a[1];
  out[2] = x * a[2];
  out[3] = y * a[3];
  out[4] = y * a[4];
  out[5] = y * a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  return out;
}
/**
 * Calculates a 3x3 matrix from the given quaternion
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {ReadonlyQuat} q Quaternion to create matrix from
 *
 * @returns {mat3} out
 */

function fromQuat$1(out, q) {
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var yx = y * x2;
  var yy = y * y2;
  var zx = z * x2;
  var zy = z * y2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  out[0] = 1 - yy - zz;
  out[3] = yx - wz;
  out[6] = zx + wy;
  out[1] = yx + wz;
  out[4] = 1 - xx - zz;
  out[7] = zy - wx;
  out[2] = zx - wy;
  out[5] = zy + wx;
  out[8] = 1 - xx - yy;
  return out;
}

var INDICES$1;

(function (INDICES) {
  INDICES[INDICES["COL0ROW0"] = 0] = "COL0ROW0";
  INDICES[INDICES["COL0ROW1"] = 1] = "COL0ROW1";
  INDICES[INDICES["COL0ROW2"] = 2] = "COL0ROW2";
  INDICES[INDICES["COL1ROW0"] = 3] = "COL1ROW0";
  INDICES[INDICES["COL1ROW1"] = 4] = "COL1ROW1";
  INDICES[INDICES["COL1ROW2"] = 5] = "COL1ROW2";
  INDICES[INDICES["COL2ROW0"] = 6] = "COL2ROW0";
  INDICES[INDICES["COL2ROW1"] = 7] = "COL2ROW1";
  INDICES[INDICES["COL2ROW2"] = 8] = "COL2ROW2";
})(INDICES$1 || (INDICES$1 = {}));

const IDENTITY_MATRIX$1 = Object.freeze([1, 0, 0, 0, 1, 0, 0, 0, 1]);
class Matrix3 extends Matrix {
  static get IDENTITY() {
    return getIdentityMatrix$1();
  }

  static get ZERO() {
    return getZeroMatrix$1();
  }

  get ELEMENTS() {
    return 9;
  }

  get RANK() {
    return 3;
  }

  get INDICES() {
    return INDICES$1;
  }

  constructor(array, ...args) {
    super(-0, -0, -0, -0, -0, -0, -0, -0, -0);

    if (arguments.length === 1 && Array.isArray(array)) {
      this.copy(array);
    } else if (args.length > 0) {
      this.copy([array, ...args]);
    } else {
      this.identity();
    }
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    this[2] = array[2];
    this[3] = array[3];
    this[4] = array[4];
    this[5] = array[5];
    this[6] = array[6];
    this[7] = array[7];
    this[8] = array[8];
    return this.check();
  }

  identity() {
    return this.copy(IDENTITY_MATRIX$1);
  }

  fromObject(object) {
    return this.check();
  }

  fromQuaternion(q) {
    fromQuat$1(this, q);
    return this.check();
  }

  set(m00, m10, m20, m01, m11, m21, m02, m12, m22) {
    this[0] = m00;
    this[1] = m10;
    this[2] = m20;
    this[3] = m01;
    this[4] = m11;
    this[5] = m21;
    this[6] = m02;
    this[7] = m12;
    this[8] = m22;
    return this.check();
  }

  setRowMajor(m00, m01, m02, m10, m11, m12, m20, m21, m22) {
    this[0] = m00;
    this[1] = m10;
    this[2] = m20;
    this[3] = m01;
    this[4] = m11;
    this[5] = m21;
    this[6] = m02;
    this[7] = m12;
    this[8] = m22;
    return this.check();
  }

  determinant() {
    return determinant$1(this);
  }

  transpose() {
    transpose$1(this, this);
    return this.check();
  }

  invert() {
    invert$2(this, this);
    return this.check();
  }

  multiplyLeft(a) {
    multiply$2(this, a, this);
    return this.check();
  }

  multiplyRight(a) {
    multiply$2(this, this, a);
    return this.check();
  }

  rotate(radians) {
    rotate$1(this, this, radians);
    return this.check();
  }

  scale(factor) {
    if (Array.isArray(factor)) {
      scale$3(this, this, factor);
    } else {
      scale$3(this, this, [factor, factor]);
    }

    return this.check();
  }

  translate(vec) {
    translate$1(this, this, vec);
    return this.check();
  }

  transform(vector, result) {
    let out;

    switch (vector.length) {
      case 2:
        out = transformMat3$1(result || [-0, -0], vector, this);
        break;

      case 3:
        out = transformMat3(result || [-0, -0, -0], vector, this);
        break;

      case 4:
        out = vec4_transformMat3(result || [-0, -0, -0, -0], vector, this);
        break;

      default:
        throw new Error('Illegal vector');
    }

    checkVector(out, vector.length);
    return out;
  }

  transformVector(vector, result) {
    return this.transform(vector, result);
  }

  transformVector2(vector, result) {
    return this.transform(vector, result);
  }

  transformVector3(vector, result) {
    return this.transform(vector, result);
  }

}
let ZERO_MATRIX3;
let IDENTITY_MATRIX3;

function getZeroMatrix$1() {
  if (!ZERO_MATRIX3) {
    ZERO_MATRIX3 = new Matrix3([0, 0, 0, 0, 0, 0, 0, 0, 0]);
    Object.freeze(ZERO_MATRIX3);
  }

  return ZERO_MATRIX3;
}

function getIdentityMatrix$1() {
  if (!IDENTITY_MATRIX3) {
    IDENTITY_MATRIX3 = new Matrix3();
    Object.freeze(IDENTITY_MATRIX3);
  }

  return IDENTITY_MATRIX3;
}

/**
 * Set a mat4 to the identity matrix
 *
 * @param {mat4} out the receiving matrix
 * @returns {mat4} out
 */

function identity$2(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = 1;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 1;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Transpose the values of a mat4
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */

function transpose(out, a) {
  // If we are transposing ourselves we can skip a few steps but have to cache some values
  if (out === a) {
    var a01 = a[1],
        a02 = a[2],
        a03 = a[3];
    var a12 = a[6],
        a13 = a[7];
    var a23 = a[11];
    out[1] = a[4];
    out[2] = a[8];
    out[3] = a[12];
    out[4] = a01;
    out[6] = a[9];
    out[7] = a[13];
    out[8] = a02;
    out[9] = a12;
    out[11] = a[14];
    out[12] = a03;
    out[13] = a13;
    out[14] = a23;
  } else {
    out[0] = a[0];
    out[1] = a[4];
    out[2] = a[8];
    out[3] = a[12];
    out[4] = a[1];
    out[5] = a[5];
    out[6] = a[9];
    out[7] = a[13];
    out[8] = a[2];
    out[9] = a[6];
    out[10] = a[10];
    out[11] = a[14];
    out[12] = a[3];
    out[13] = a[7];
    out[14] = a[11];
    out[15] = a[15];
  }

  return out;
}
/**
 * Inverts a mat4
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */

function invert$1(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  var b00 = a00 * a11 - a01 * a10;
  var b01 = a00 * a12 - a02 * a10;
  var b02 = a00 * a13 - a03 * a10;
  var b03 = a01 * a12 - a02 * a11;
  var b04 = a01 * a13 - a03 * a11;
  var b05 = a02 * a13 - a03 * a12;
  var b06 = a20 * a31 - a21 * a30;
  var b07 = a20 * a32 - a22 * a30;
  var b08 = a20 * a33 - a23 * a30;
  var b09 = a21 * a32 - a22 * a31;
  var b10 = a21 * a33 - a23 * a31;
  var b11 = a22 * a33 - a23 * a32; // Calculate the determinant

  var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
  out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
  out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
  out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;
  out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
  out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
  out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
  out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;
  out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
  out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
  out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
  out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;
  out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;
  out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;
  out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;
  out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;
  return out;
}
/**
 * Calculates the determinant of a mat4
 *
 * @param {ReadonlyMat4} a the source matrix
 * @returns {Number} determinant of a
 */

function determinant(a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  var b00 = a00 * a11 - a01 * a10;
  var b01 = a00 * a12 - a02 * a10;
  var b02 = a00 * a13 - a03 * a10;
  var b03 = a01 * a12 - a02 * a11;
  var b04 = a01 * a13 - a03 * a11;
  var b05 = a02 * a13 - a03 * a12;
  var b06 = a20 * a31 - a21 * a30;
  var b07 = a20 * a32 - a22 * a30;
  var b08 = a20 * a33 - a23 * a30;
  var b09 = a21 * a32 - a22 * a31;
  var b10 = a21 * a33 - a23 * a31;
  var b11 = a22 * a33 - a23 * a32; // Calculate the determinant

  return b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
}
/**
 * Multiplies two mat4s
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the first operand
 * @param {ReadonlyMat4} b the second operand
 * @returns {mat4} out
 */

function multiply$1(out, a, b) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15]; // Cache only the current line of the second matrix

  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  out[0] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[1] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[2] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[3] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[4];
  b1 = b[5];
  b2 = b[6];
  b3 = b[7];
  out[4] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[5] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[6] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[7] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[8];
  b1 = b[9];
  b2 = b[10];
  b3 = b[11];
  out[8] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[9] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[10] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[11] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[12];
  b1 = b[13];
  b2 = b[14];
  b3 = b[15];
  out[12] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[13] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[14] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[15] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  return out;
}
/**
 * Translate a mat4 by the given vector
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to translate
 * @param {ReadonlyVec3} v vector to translate by
 * @returns {mat4} out
 */

function translate(out, a, v) {
  var x = v[0],
      y = v[1],
      z = v[2];
  var a00, a01, a02, a03;
  var a10, a11, a12, a13;
  var a20, a21, a22, a23;

  if (a === out) {
    out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
    out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
    out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
    out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
  } else {
    a00 = a[0];
    a01 = a[1];
    a02 = a[2];
    a03 = a[3];
    a10 = a[4];
    a11 = a[5];
    a12 = a[6];
    a13 = a[7];
    a20 = a[8];
    a21 = a[9];
    a22 = a[10];
    a23 = a[11];
    out[0] = a00;
    out[1] = a01;
    out[2] = a02;
    out[3] = a03;
    out[4] = a10;
    out[5] = a11;
    out[6] = a12;
    out[7] = a13;
    out[8] = a20;
    out[9] = a21;
    out[10] = a22;
    out[11] = a23;
    out[12] = a00 * x + a10 * y + a20 * z + a[12];
    out[13] = a01 * x + a11 * y + a21 * z + a[13];
    out[14] = a02 * x + a12 * y + a22 * z + a[14];
    out[15] = a03 * x + a13 * y + a23 * z + a[15];
  }

  return out;
}
/**
 * Scales the mat4 by the dimensions in the given vec3 not using vectorization
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to scale
 * @param {ReadonlyVec3} v the vec3 to scale the matrix by
 * @returns {mat4} out
 **/

function scale$2(out, a, v) {
  var x = v[0],
      y = v[1],
      z = v[2];
  out[0] = a[0] * x;
  out[1] = a[1] * x;
  out[2] = a[2] * x;
  out[3] = a[3] * x;
  out[4] = a[4] * y;
  out[5] = a[5] * y;
  out[6] = a[6] * y;
  out[7] = a[7] * y;
  out[8] = a[8] * z;
  out[9] = a[9] * z;
  out[10] = a[10] * z;
  out[11] = a[11] * z;
  out[12] = a[12];
  out[13] = a[13];
  out[14] = a[14];
  out[15] = a[15];
  return out;
}
/**
 * Rotates a mat4 by the given angle around the given axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @param {ReadonlyVec3} axis the axis to rotate around
 * @returns {mat4} out
 */

function rotate(out, a, rad, axis) {
  var x = axis[0],
      y = axis[1],
      z = axis[2];
  var len = Math.hypot(x, y, z);
  var s, c, t;
  var a00, a01, a02, a03;
  var a10, a11, a12, a13;
  var a20, a21, a22, a23;
  var b00, b01, b02;
  var b10, b11, b12;
  var b20, b21, b22;

  if (len < EPSILON) {
    return null;
  }

  len = 1 / len;
  x *= len;
  y *= len;
  z *= len;
  s = Math.sin(rad);
  c = Math.cos(rad);
  t = 1 - c;
  a00 = a[0];
  a01 = a[1];
  a02 = a[2];
  a03 = a[3];
  a10 = a[4];
  a11 = a[5];
  a12 = a[6];
  a13 = a[7];
  a20 = a[8];
  a21 = a[9];
  a22 = a[10];
  a23 = a[11]; // Construct the elements of the rotation matrix

  b00 = x * x * t + c;
  b01 = y * x * t + z * s;
  b02 = z * x * t - y * s;
  b10 = x * y * t - z * s;
  b11 = y * y * t + c;
  b12 = z * y * t + x * s;
  b20 = x * z * t + y * s;
  b21 = y * z * t - x * s;
  b22 = z * z * t + c; // Perform rotation-specific matrix multiplication

  out[0] = a00 * b00 + a10 * b01 + a20 * b02;
  out[1] = a01 * b00 + a11 * b01 + a21 * b02;
  out[2] = a02 * b00 + a12 * b01 + a22 * b02;
  out[3] = a03 * b00 + a13 * b01 + a23 * b02;
  out[4] = a00 * b10 + a10 * b11 + a20 * b12;
  out[5] = a01 * b10 + a11 * b11 + a21 * b12;
  out[6] = a02 * b10 + a12 * b11 + a22 * b12;
  out[7] = a03 * b10 + a13 * b11 + a23 * b12;
  out[8] = a00 * b20 + a10 * b21 + a20 * b22;
  out[9] = a01 * b20 + a11 * b21 + a21 * b22;
  out[10] = a02 * b20 + a12 * b21 + a22 * b22;
  out[11] = a03 * b20 + a13 * b21 + a23 * b22;

  if (a !== out) {
    // If the source and destination differ, copy the unchanged last row
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  }

  return out;
}
/**
 * Rotates a matrix by the given angle around the X axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */

function rotateX$1(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a10 = a[4];
  var a11 = a[5];
  var a12 = a[6];
  var a13 = a[7];
  var a20 = a[8];
  var a21 = a[9];
  var a22 = a[10];
  var a23 = a[11];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged rows
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    out[3] = a[3];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[4] = a10 * c + a20 * s;
  out[5] = a11 * c + a21 * s;
  out[6] = a12 * c + a22 * s;
  out[7] = a13 * c + a23 * s;
  out[8] = a20 * c - a10 * s;
  out[9] = a21 * c - a11 * s;
  out[10] = a22 * c - a12 * s;
  out[11] = a23 * c - a13 * s;
  return out;
}
/**
 * Rotates a matrix by the given angle around the Y axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */

function rotateY$1(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a00 = a[0];
  var a01 = a[1];
  var a02 = a[2];
  var a03 = a[3];
  var a20 = a[8];
  var a21 = a[9];
  var a22 = a[10];
  var a23 = a[11];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged rows
    out[4] = a[4];
    out[5] = a[5];
    out[6] = a[6];
    out[7] = a[7];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[0] = a00 * c - a20 * s;
  out[1] = a01 * c - a21 * s;
  out[2] = a02 * c - a22 * s;
  out[3] = a03 * c - a23 * s;
  out[8] = a00 * s + a20 * c;
  out[9] = a01 * s + a21 * c;
  out[10] = a02 * s + a22 * c;
  out[11] = a03 * s + a23 * c;
  return out;
}
/**
 * Rotates a matrix by the given angle around the Z axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */

function rotateZ$1(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a00 = a[0];
  var a01 = a[1];
  var a02 = a[2];
  var a03 = a[3];
  var a10 = a[4];
  var a11 = a[5];
  var a12 = a[6];
  var a13 = a[7];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged last row
    out[8] = a[8];
    out[9] = a[9];
    out[10] = a[10];
    out[11] = a[11];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[0] = a00 * c + a10 * s;
  out[1] = a01 * c + a11 * s;
  out[2] = a02 * c + a12 * s;
  out[3] = a03 * c + a13 * s;
  out[4] = a10 * c - a00 * s;
  out[5] = a11 * c - a01 * s;
  out[6] = a12 * c - a02 * s;
  out[7] = a13 * c - a03 * s;
  return out;
}
/**
 * Returns the scaling factor component of a transformation
 *  matrix. If a matrix is built with fromRotationTranslationScale
 *  with a normalized Quaternion paramter, the returned vector will be
 *  the same as the scaling vector
 *  originally supplied.
 * @param  {vec3} out Vector to receive scaling factor component
 * @param  {ReadonlyMat4} mat Matrix to be decomposed (input)
 * @return {vec3} out
 */

function getScaling(out, mat) {
  var m11 = mat[0];
  var m12 = mat[1];
  var m13 = mat[2];
  var m21 = mat[4];
  var m22 = mat[5];
  var m23 = mat[6];
  var m31 = mat[8];
  var m32 = mat[9];
  var m33 = mat[10];
  out[0] = Math.hypot(m11, m12, m13);
  out[1] = Math.hypot(m21, m22, m23);
  out[2] = Math.hypot(m31, m32, m33);
  return out;
}
/**
 * Calculates a 4x4 matrix from the given quaternion
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {ReadonlyQuat} q Quaternion to create matrix from
 *
 * @returns {mat4} out
 */

function fromQuat(out, q) {
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var yx = y * x2;
  var yy = y * y2;
  var zx = z * x2;
  var zy = z * y2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  out[0] = 1 - yy - zz;
  out[1] = yx + wz;
  out[2] = zx - wy;
  out[3] = 0;
  out[4] = yx - wz;
  out[5] = 1 - xx - zz;
  out[6] = zy + wx;
  out[7] = 0;
  out[8] = zx + wy;
  out[9] = zy - wx;
  out[10] = 1 - xx - yy;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Generates a frustum matrix with the given bounds
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {Number} left Left bound of the frustum
 * @param {Number} right Right bound of the frustum
 * @param {Number} bottom Bottom bound of the frustum
 * @param {Number} top Top bound of the frustum
 * @param {Number} near Near bound of the frustum
 * @param {Number} far Far bound of the frustum
 * @returns {mat4} out
 */

function frustum(out, left, right, bottom, top, near, far) {
  var rl = 1 / (right - left);
  var tb = 1 / (top - bottom);
  var nf = 1 / (near - far);
  out[0] = near * 2 * rl;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = near * 2 * tb;
  out[6] = 0;
  out[7] = 0;
  out[8] = (right + left) * rl;
  out[9] = (top + bottom) * tb;
  out[10] = (far + near) * nf;
  out[11] = -1;
  out[12] = 0;
  out[13] = 0;
  out[14] = far * near * 2 * nf;
  out[15] = 0;
  return out;
}
/**
 * Generates a perspective projection matrix with the given bounds.
 * The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1],
 * which matches WebGL/OpenGL's clip volume.
 * Passing null/undefined/no value for far will generate infinite projection matrix.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {number} fovy Vertical field of view in radians
 * @param {number} aspect Aspect ratio. typically viewport width/height
 * @param {number} near Near bound of the frustum
 * @param {number} far Far bound of the frustum, can be null or Infinity
 * @returns {mat4} out
 */

function perspectiveNO(out, fovy, aspect, near, far) {
  var f = 1.0 / Math.tan(fovy / 2),
      nf;
  out[0] = f / aspect;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = f;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[11] = -1;
  out[12] = 0;
  out[13] = 0;
  out[15] = 0;

  if (far != null && far !== Infinity) {
    nf = 1 / (near - far);
    out[10] = (far + near) * nf;
    out[14] = 2 * far * near * nf;
  } else {
    out[10] = -1;
    out[14] = -2 * near;
  }

  return out;
}
/**
 * Alias for {@link mat4.perspectiveNO}
 * @function
 */

var perspective = perspectiveNO;
/**
 * Generates a orthogonal projection matrix with the given bounds.
 * The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1],
 * which matches WebGL/OpenGL's clip volume.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {number} left Left bound of the frustum
 * @param {number} right Right bound of the frustum
 * @param {number} bottom Bottom bound of the frustum
 * @param {number} top Top bound of the frustum
 * @param {number} near Near bound of the frustum
 * @param {number} far Far bound of the frustum
 * @returns {mat4} out
 */

function orthoNO(out, left, right, bottom, top, near, far) {
  var lr = 1 / (left - right);
  var bt = 1 / (bottom - top);
  var nf = 1 / (near - far);
  out[0] = -2 * lr;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = -2 * bt;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 2 * nf;
  out[11] = 0;
  out[12] = (left + right) * lr;
  out[13] = (top + bottom) * bt;
  out[14] = (far + near) * nf;
  out[15] = 1;
  return out;
}
/**
 * Alias for {@link mat4.orthoNO}
 * @function
 */

var ortho = orthoNO;
/**
 * Generates a look-at matrix with the given eye position, focal point, and up axis.
 * If you want a matrix that actually makes an object look at another object, you should use targetTo instead.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {ReadonlyVec3} eye Position of the viewer
 * @param {ReadonlyVec3} center Point the viewer is looking at
 * @param {ReadonlyVec3} up vec3 pointing up
 * @returns {mat4} out
 */

function lookAt(out, eye, center, up) {
  var x0, x1, x2, y0, y1, y2, z0, z1, z2, len;
  var eyex = eye[0];
  var eyey = eye[1];
  var eyez = eye[2];
  var upx = up[0];
  var upy = up[1];
  var upz = up[2];
  var centerx = center[0];
  var centery = center[1];
  var centerz = center[2];

  if (Math.abs(eyex - centerx) < EPSILON && Math.abs(eyey - centery) < EPSILON && Math.abs(eyez - centerz) < EPSILON) {
    return identity$2(out);
  }

  z0 = eyex - centerx;
  z1 = eyey - centery;
  z2 = eyez - centerz;
  len = 1 / Math.hypot(z0, z1, z2);
  z0 *= len;
  z1 *= len;
  z2 *= len;
  x0 = upy * z2 - upz * z1;
  x1 = upz * z0 - upx * z2;
  x2 = upx * z1 - upy * z0;
  len = Math.hypot(x0, x1, x2);

  if (!len) {
    x0 = 0;
    x1 = 0;
    x2 = 0;
  } else {
    len = 1 / len;
    x0 *= len;
    x1 *= len;
    x2 *= len;
  }

  y0 = z1 * x2 - z2 * x1;
  y1 = z2 * x0 - z0 * x2;
  y2 = z0 * x1 - z1 * x0;
  len = Math.hypot(y0, y1, y2);

  if (!len) {
    y0 = 0;
    y1 = 0;
    y2 = 0;
  } else {
    len = 1 / len;
    y0 *= len;
    y1 *= len;
    y2 *= len;
  }

  out[0] = x0;
  out[1] = y0;
  out[2] = z0;
  out[3] = 0;
  out[4] = x1;
  out[5] = y1;
  out[6] = z1;
  out[7] = 0;
  out[8] = x2;
  out[9] = y2;
  out[10] = z2;
  out[11] = 0;
  out[12] = -(x0 * eyex + x1 * eyey + x2 * eyez);
  out[13] = -(y0 * eyex + y1 * eyey + y2 * eyez);
  out[14] = -(z0 * eyex + z1 * eyey + z2 * eyez);
  out[15] = 1;
  return out;
}

/**
 * 4 Dimensional Vector
 * @module vec4
 */

/**
 * Creates a new, empty vec4
 *
 * @returns {vec4} a new 4D vector
 */

function create$1() {
  var out = new ARRAY_TYPE(4);

  if (ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
    out[3] = 0;
  }

  return out;
}
/**
 * Adds two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */

function add$1(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  return out;
}
/**
 * Scales a vec4 by a scalar number
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {vec4} out
 */

function scale$1(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  return out;
}
/**
 * Calculates the length of a vec4
 *
 * @param {ReadonlyVec4} a vector to calculate length of
 * @returns {Number} length of a
 */

function length$1(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  return Math.hypot(x, y, z, w);
}
/**
 * Calculates the squared length of a vec4
 *
 * @param {ReadonlyVec4} a vector to calculate squared length of
 * @returns {Number} squared length of a
 */

function squaredLength$1(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  return x * x + y * y + z * z + w * w;
}
/**
 * Normalize a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to normalize
 * @returns {vec4} out
 */

function normalize$1(out, a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  var len = x * x + y * y + z * z + w * w;

  if (len > 0) {
    len = 1 / Math.sqrt(len);
  }

  out[0] = x * len;
  out[1] = y * len;
  out[2] = z * len;
  out[3] = w * len;
  return out;
}
/**
 * Calculates the dot product of two vec4's
 *
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {Number} dot product of a and b
 */

function dot$1(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
}
/**
 * Performs a linear interpolation between two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec4} out
 */

function lerp$1(out, a, b, t) {
  var ax = a[0];
  var ay = a[1];
  var az = a[2];
  var aw = a[3];
  out[0] = ax + t * (b[0] - ax);
  out[1] = ay + t * (b[1] - ay);
  out[2] = az + t * (b[2] - az);
  out[3] = aw + t * (b[3] - aw);
  return out;
}
/**
 * Transforms the vec4 with a mat4.
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec4} out
 */

function transformMat4(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  out[0] = m[0] * x + m[4] * y + m[8] * z + m[12] * w;
  out[1] = m[1] * x + m[5] * y + m[9] * z + m[13] * w;
  out[2] = m[2] * x + m[6] * y + m[10] * z + m[14] * w;
  out[3] = m[3] * x + m[7] * y + m[11] * z + m[15] * w;
  return out;
}
/**
 * Transforms the vec4 with a quat
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to transform
 * @param {ReadonlyQuat} q quaternion to transform with
 * @returns {vec4} out
 */

function transformQuat(out, a, q) {
  var x = a[0],
      y = a[1],
      z = a[2];
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3]; // calculate quat * vec

  var ix = qw * x + qy * z - qz * y;
  var iy = qw * y + qz * x - qx * z;
  var iz = qw * z + qx * y - qy * x;
  var iw = -qx * x - qy * y - qz * z; // calculate result * inverse quat

  out[0] = ix * qw + iw * -qx + iy * -qz - iz * -qy;
  out[1] = iy * qw + iw * -qy + iz * -qx - ix * -qz;
  out[2] = iz * qw + iw * -qz + ix * -qy - iy * -qx;
  out[3] = a[3];
  return out;
}
/**
 * Perform some operation over an array of vec4s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

(function () {
  var vec = create$1();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 4;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      vec[2] = a[i + 2];
      vec[3] = a[i + 3];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
      a[i + 2] = vec[2];
      a[i + 3] = vec[3];
    }

    return a;
  };
})();

var INDICES;

(function (INDICES) {
  INDICES[INDICES["COL0ROW0"] = 0] = "COL0ROW0";
  INDICES[INDICES["COL0ROW1"] = 1] = "COL0ROW1";
  INDICES[INDICES["COL0ROW2"] = 2] = "COL0ROW2";
  INDICES[INDICES["COL0ROW3"] = 3] = "COL0ROW3";
  INDICES[INDICES["COL1ROW0"] = 4] = "COL1ROW0";
  INDICES[INDICES["COL1ROW1"] = 5] = "COL1ROW1";
  INDICES[INDICES["COL1ROW2"] = 6] = "COL1ROW2";
  INDICES[INDICES["COL1ROW3"] = 7] = "COL1ROW3";
  INDICES[INDICES["COL2ROW0"] = 8] = "COL2ROW0";
  INDICES[INDICES["COL2ROW1"] = 9] = "COL2ROW1";
  INDICES[INDICES["COL2ROW2"] = 10] = "COL2ROW2";
  INDICES[INDICES["COL2ROW3"] = 11] = "COL2ROW3";
  INDICES[INDICES["COL3ROW0"] = 12] = "COL3ROW0";
  INDICES[INDICES["COL3ROW1"] = 13] = "COL3ROW1";
  INDICES[INDICES["COL3ROW2"] = 14] = "COL3ROW2";
  INDICES[INDICES["COL3ROW3"] = 15] = "COL3ROW3";
})(INDICES || (INDICES = {}));

const DEFAULT_FOVY = 45 * Math.PI / 180;
const DEFAULT_ASPECT = 1;
const DEFAULT_NEAR = 0.1;
const DEFAULT_FAR = 500;
const IDENTITY_MATRIX = Object.freeze([1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]);
class Matrix4 extends Matrix {
  static get IDENTITY() {
    return getIdentityMatrix();
  }

  static get ZERO() {
    return getZeroMatrix();
  }

  get ELEMENTS() {
    return 16;
  }

  get RANK() {
    return 4;
  }

  get INDICES() {
    return INDICES;
  }

  constructor(array) {
    super(-0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0);

    if (arguments.length === 1 && Array.isArray(array)) {
      this.copy(array);
    } else {
      this.identity();
    }
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    this[2] = array[2];
    this[3] = array[3];
    this[4] = array[4];
    this[5] = array[5];
    this[6] = array[6];
    this[7] = array[7];
    this[8] = array[8];
    this[9] = array[9];
    this[10] = array[10];
    this[11] = array[11];
    this[12] = array[12];
    this[13] = array[13];
    this[14] = array[14];
    this[15] = array[15];
    return this.check();
  }

  set(m00, m10, m20, m30, m01, m11, m21, m31, m02, m12, m22, m32, m03, m13, m23, m33) {
    this[0] = m00;
    this[1] = m10;
    this[2] = m20;
    this[3] = m30;
    this[4] = m01;
    this[5] = m11;
    this[6] = m21;
    this[7] = m31;
    this[8] = m02;
    this[9] = m12;
    this[10] = m22;
    this[11] = m32;
    this[12] = m03;
    this[13] = m13;
    this[14] = m23;
    this[15] = m33;
    return this.check();
  }

  setRowMajor(m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33) {
    this[0] = m00;
    this[1] = m10;
    this[2] = m20;
    this[3] = m30;
    this[4] = m01;
    this[5] = m11;
    this[6] = m21;
    this[7] = m31;
    this[8] = m02;
    this[9] = m12;
    this[10] = m22;
    this[11] = m32;
    this[12] = m03;
    this[13] = m13;
    this[14] = m23;
    this[15] = m33;
    return this.check();
  }

  toRowMajor(result) {
    result[0] = this[0];
    result[1] = this[4];
    result[2] = this[8];
    result[3] = this[12];
    result[4] = this[1];
    result[5] = this[5];
    result[6] = this[9];
    result[7] = this[13];
    result[8] = this[2];
    result[9] = this[6];
    result[10] = this[10];
    result[11] = this[14];
    result[12] = this[3];
    result[13] = this[7];
    result[14] = this[11];
    result[15] = this[15];
    return result;
  }

  identity() {
    return this.copy(IDENTITY_MATRIX);
  }

  fromObject(object) {
    return this.check();
  }

  fromQuaternion(quaternion) {
    fromQuat(this, quaternion);
    return this.check();
  }

  frustum(view) {
    const {
      left,
      right,
      bottom,
      top,
      near = DEFAULT_NEAR,
      far = DEFAULT_FAR
    } = view;

    if (far === Infinity) {
      computeInfinitePerspectiveOffCenter(this, left, right, bottom, top, near);
    } else {
      frustum(this, left, right, bottom, top, near, far);
    }

    return this.check();
  }

  lookAt(view) {
    const {
      eye,
      center = [0, 0, 0],
      up = [0, 1, 0]
    } = view;
    lookAt(this, eye, center, up);
    return this.check();
  }

  ortho(view) {
    const {
      left,
      right,
      bottom,
      top,
      near = DEFAULT_NEAR,
      far = DEFAULT_FAR
    } = view;
    ortho(this, left, right, bottom, top, near, far);
    return this.check();
  }

  orthographic(view) {
    const {
      fovy = DEFAULT_FOVY,
      aspect = DEFAULT_ASPECT,
      focalDistance = 1,
      near = DEFAULT_NEAR,
      far = DEFAULT_FAR
    } = view;
    checkRadians(fovy);
    const halfY = fovy / 2;
    const top = focalDistance * Math.tan(halfY);
    const right = top * aspect;
    return this.ortho({
      left: -right,
      right,
      bottom: -top,
      top,
      near,
      far
    });
  }

  perspective(view) {
    const {
      fovy = 45 * Math.PI / 180,
      aspect = 1,
      near = 0.1,
      far = 500
    } = view;
    checkRadians(fovy);
    perspective(this, fovy, aspect, near, far);
    return this.check();
  }

  determinant() {
    return determinant(this);
  }

  getScale(result = [-0, -0, -0]) {
    result[0] = Math.sqrt(this[0] * this[0] + this[1] * this[1] + this[2] * this[2]);
    result[1] = Math.sqrt(this[4] * this[4] + this[5] * this[5] + this[6] * this[6]);
    result[2] = Math.sqrt(this[8] * this[8] + this[9] * this[9] + this[10] * this[10]);
    return result;
  }

  getTranslation(result = [-0, -0, -0]) {
    result[0] = this[12];
    result[1] = this[13];
    result[2] = this[14];
    return result;
  }

  getRotation(result, scaleResult) {
    result = result || [-0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0];
    scaleResult = scaleResult || [-0, -0, -0];
    const scale = this.getScale(scaleResult);
    const inverseScale0 = 1 / scale[0];
    const inverseScale1 = 1 / scale[1];
    const inverseScale2 = 1 / scale[2];
    result[0] = this[0] * inverseScale0;
    result[1] = this[1] * inverseScale1;
    result[2] = this[2] * inverseScale2;
    result[3] = 0;
    result[4] = this[4] * inverseScale0;
    result[5] = this[5] * inverseScale1;
    result[6] = this[6] * inverseScale2;
    result[7] = 0;
    result[8] = this[8] * inverseScale0;
    result[9] = this[9] * inverseScale1;
    result[10] = this[10] * inverseScale2;
    result[11] = 0;
    result[12] = 0;
    result[13] = 0;
    result[14] = 0;
    result[15] = 1;
    return result;
  }

  getRotationMatrix3(result, scaleResult) {
    result = result || [-0, -0, -0, -0, -0, -0, -0, -0, -0];
    scaleResult = scaleResult || [-0, -0, -0];
    const scale = this.getScale(scaleResult);
    const inverseScale0 = 1 / scale[0];
    const inverseScale1 = 1 / scale[1];
    const inverseScale2 = 1 / scale[2];
    result[0] = this[0] * inverseScale0;
    result[1] = this[1] * inverseScale1;
    result[2] = this[2] * inverseScale2;
    result[3] = this[4] * inverseScale0;
    result[4] = this[5] * inverseScale1;
    result[5] = this[6] * inverseScale2;
    result[6] = this[8] * inverseScale0;
    result[7] = this[9] * inverseScale1;
    result[8] = this[10] * inverseScale2;
    return result;
  }

  transpose() {
    transpose(this, this);
    return this.check();
  }

  invert() {
    invert$1(this, this);
    return this.check();
  }

  multiplyLeft(a) {
    multiply$1(this, a, this);
    return this.check();
  }

  multiplyRight(a) {
    multiply$1(this, this, a);
    return this.check();
  }

  rotateX(radians) {
    rotateX$1(this, this, radians);
    return this.check();
  }

  rotateY(radians) {
    rotateY$1(this, this, radians);
    return this.check();
  }

  rotateZ(radians) {
    rotateZ$1(this, this, radians);
    return this.check();
  }

  rotateXYZ(angleXYZ) {
    return this.rotateX(angleXYZ[0]).rotateY(angleXYZ[1]).rotateZ(angleXYZ[2]);
  }

  rotateAxis(radians, axis) {
    rotate(this, this, radians, axis);
    return this.check();
  }

  scale(factor) {
    scale$2(this, this, Array.isArray(factor) ? factor : [factor, factor, factor]);
    return this.check();
  }

  translate(vector) {
    translate(this, this, vector);
    return this.check();
  }

  transform(vector, result) {
    if (vector.length === 4) {
      result = transformMat4(result || [-0, -0, -0, -0], vector, this);
      checkVector(result, 4);
      return result;
    }

    return this.transformAsPoint(vector, result);
  }

  transformAsPoint(vector, result) {
    const {
      length
    } = vector;
    let out;

    switch (length) {
      case 2:
        out = transformMat4$2(result || [-0, -0], vector, this);
        break;

      case 3:
        out = transformMat4$1(result || [-0, -0, -0], vector, this);
        break;

      default:
        throw new Error('Illegal vector');
    }

    checkVector(out, vector.length);
    return out;
  }

  transformAsVector(vector, result) {
    let out;

    switch (vector.length) {
      case 2:
        out = vec2_transformMat4AsVector(result || [-0, -0], vector, this);
        break;

      case 3:
        out = vec3_transformMat4AsVector(result || [-0, -0, -0], vector, this);
        break;

      default:
        throw new Error('Illegal vector');
    }

    checkVector(out, vector.length);
    return out;
  }

  transformPoint(vector, result) {
    return this.transformAsPoint(vector, result);
  }

  transformVector(vector, result) {
    return this.transformAsPoint(vector, result);
  }

  transformDirection(vector, result) {
    return this.transformAsVector(vector, result);
  }

  makeRotationX(radians) {
    return this.identity().rotateX(radians);
  }

  makeTranslation(x, y, z) {
    return this.identity().translate([x, y, z]);
  }

}
let ZERO;
let IDENTITY;

function getZeroMatrix() {
  if (!ZERO) {
    ZERO = new Matrix4([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
    Object.freeze(ZERO);
  }

  return ZERO;
}

function getIdentityMatrix() {
  if (!IDENTITY) {
    IDENTITY = new Matrix4();
    Object.freeze(IDENTITY);
  }

  return IDENTITY;
}

function checkRadians(possiblyDegrees) {
  if (possiblyDegrees > Math.PI * 2) {
    throw Error('expected radians');
  }
}

function computeInfinitePerspectiveOffCenter(result, left, right, bottom, top, near) {
  const column0Row0 = 2 * near / (right - left);
  const column1Row1 = 2 * near / (top - bottom);
  const column2Row0 = (right + left) / (right - left);
  const column2Row1 = (top + bottom) / (top - bottom);
  const column2Row2 = -1;
  const column2Row3 = -1;
  const column3Row2 = -2 * near;
  result[0] = column0Row0;
  result[1] = 0;
  result[2] = 0;
  result[3] = 0;
  result[4] = 0;
  result[5] = column1Row1;
  result[6] = 0;
  result[7] = 0;
  result[8] = column2Row0;
  result[9] = column2Row1;
  result[10] = column2Row2;
  result[11] = column2Row3;
  result[12] = 0;
  result[13] = 0;
  result[14] = column3Row2;
  result[15] = 0;
  return result;
}

/**
 * Quaternion
 * @module quat
 */

/**
 * Creates a new identity quat
 *
 * @returns {quat} a new quaternion
 */

function create() {
  var out = new ARRAY_TYPE(4);

  if (ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
  }

  out[3] = 1;
  return out;
}
/**
 * Set a quat to the identity quaternion
 *
 * @param {quat} out the receiving quaternion
 * @returns {quat} out
 */

function identity$1(out) {
  out[0] = 0;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
}
/**
 * Sets a quat from the given angle and rotation axis,
 * then returns it.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyVec3} axis the axis around which to rotate
 * @param {Number} rad the angle in radians
 * @returns {quat} out
 **/

function setAxisAngle(out, axis, rad) {
  rad = rad * 0.5;
  var s = Math.sin(rad);
  out[0] = s * axis[0];
  out[1] = s * axis[1];
  out[2] = s * axis[2];
  out[3] = Math.cos(rad);
  return out;
}
/**
 * Multiplies two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 */

function multiply(out, a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  out[0] = ax * bw + aw * bx + ay * bz - az * by;
  out[1] = ay * bw + aw * by + az * bx - ax * bz;
  out[2] = az * bw + aw * bz + ax * by - ay * bx;
  out[3] = aw * bw - ax * bx - ay * by - az * bz;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the X axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */

function rotateX(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + aw * bx;
  out[1] = ay * bw + az * bx;
  out[2] = az * bw - ay * bx;
  out[3] = aw * bw - ax * bx;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Y axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */

function rotateY(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var by = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw - az * by;
  out[1] = ay * bw + aw * by;
  out[2] = az * bw + ax * by;
  out[3] = aw * bw - ay * by;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Z axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */

function rotateZ(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bz = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + ay * bz;
  out[1] = ay * bw - ax * bz;
  out[2] = az * bw + aw * bz;
  out[3] = aw * bw - az * bz;
  return out;
}
/**
 * Calculates the W component of a quat from the X, Y, and Z components.
 * Assumes that quaternion is 1 unit in length.
 * Any existing W component will be ignored.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate W component of
 * @returns {quat} out
 */

function calculateW(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2];
  out[0] = x;
  out[1] = y;
  out[2] = z;
  out[3] = Math.sqrt(Math.abs(1.0 - x * x - y * y - z * z));
  return out;
}
/**
 * Performs a spherical linear interpolation between two quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */

function slerp(out, a, b, t) {
  // benchmarks:
  //    http://jsperf.com/quaternion-slerp-implementations
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  var omega, cosom, sinom, scale0, scale1; // calc cosine

  cosom = ax * bx + ay * by + az * bz + aw * bw; // adjust signs (if necessary)

  if (cosom < 0.0) {
    cosom = -cosom;
    bx = -bx;
    by = -by;
    bz = -bz;
    bw = -bw;
  } // calculate coefficients


  if (1.0 - cosom > EPSILON) {
    // standard case (slerp)
    omega = Math.acos(cosom);
    sinom = Math.sin(omega);
    scale0 = Math.sin((1.0 - t) * omega) / sinom;
    scale1 = Math.sin(t * omega) / sinom;
  } else {
    // "from" and "to" quaternions are very close
    //  ... so we can do a linear interpolation
    scale0 = 1.0 - t;
    scale1 = t;
  } // calculate final values


  out[0] = scale0 * ax + scale1 * bx;
  out[1] = scale0 * ay + scale1 * by;
  out[2] = scale0 * az + scale1 * bz;
  out[3] = scale0 * aw + scale1 * bw;
  return out;
}
/**
 * Calculates the inverse of a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate inverse of
 * @returns {quat} out
 */

function invert(out, a) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var dot = a0 * a0 + a1 * a1 + a2 * a2 + a3 * a3;
  var invDot = dot ? 1.0 / dot : 0; // TODO: Would be faster to return [0,0,0,0] immediately if dot == 0

  out[0] = -a0 * invDot;
  out[1] = -a1 * invDot;
  out[2] = -a2 * invDot;
  out[3] = a3 * invDot;
  return out;
}
/**
 * Calculates the conjugate of a quat
 * If the quaternion is normalized, this function is faster than quat.inverse and produces the same result.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate conjugate of
 * @returns {quat} out
 */

function conjugate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a[3];
  return out;
}
/**
 * Creates a quaternion from the given 3x3 rotation matrix.
 *
 * NOTE: The resultant quaternion is not normalized, so you should be sure
 * to renormalize the quaternion yourself where necessary.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyMat3} m rotation matrix
 * @returns {quat} out
 * @function
 */

function fromMat3(out, m) {
  // Algorithm in Ken Shoemake's article in 1987 SIGGRAPH course notes
  // article "Quaternion Calculus and Fast Animation".
  var fTrace = m[0] + m[4] + m[8];
  var fRoot;

  if (fTrace > 0.0) {
    // |w| > 1/2, may as well choose w > 1/2
    fRoot = Math.sqrt(fTrace + 1.0); // 2w

    out[3] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot; // 1/(4w)

    out[0] = (m[5] - m[7]) * fRoot;
    out[1] = (m[6] - m[2]) * fRoot;
    out[2] = (m[1] - m[3]) * fRoot;
  } else {
    // |w| <= 1/2
    var i = 0;
    if (m[4] > m[0]) i = 1;
    if (m[8] > m[i * 3 + i]) i = 2;
    var j = (i + 1) % 3;
    var k = (i + 2) % 3;
    fRoot = Math.sqrt(m[i * 3 + i] - m[j * 3 + j] - m[k * 3 + k] + 1.0);
    out[i] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot;
    out[3] = (m[j * 3 + k] - m[k * 3 + j]) * fRoot;
    out[j] = (m[j * 3 + i] + m[i * 3 + j]) * fRoot;
    out[k] = (m[k * 3 + i] + m[i * 3 + k]) * fRoot;
  }

  return out;
}
/**
 * Adds two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 * @function
 */

var add = add$1;
/**
 * Scales a quat by a scalar number
 *
 * @param {quat} out the receiving vector
 * @param {ReadonlyQuat} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {quat} out
 * @function
 */

var scale = scale$1;
/**
 * Calculates the dot product of two quat's
 *
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {Number} dot product of a and b
 * @function
 */

var dot = dot$1;
/**
 * Performs a linear interpolation between two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 * @function
 */

var lerp = lerp$1;
/**
 * Calculates the length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate length of
 * @returns {Number} length of a
 */

var length = length$1;
/**
 * Calculates the squared length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate squared length of
 * @returns {Number} squared length of a
 * @function
 */

var squaredLength = squaredLength$1;
/**
 * Normalize a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quaternion to normalize
 * @returns {quat} out
 * @function
 */

var normalize = normalize$1;
/**
 * Sets a quaternion to represent the shortest rotation from one
 * vector to another.
 *
 * Both vectors are assumed to be unit length.
 *
 * @param {quat} out the receiving quaternion.
 * @param {ReadonlyVec3} a the initial vector
 * @param {ReadonlyVec3} b the destination vector
 * @returns {quat} out
 */

var rotationTo = function () {
  var tmpvec3 = create$3();
  var xUnitVec3 = fromValues(1, 0, 0);
  var yUnitVec3 = fromValues(0, 1, 0);
  return function (out, a, b) {
    var dot = dot$2(a, b);

    if (dot < -0.999999) {
      cross(tmpvec3, xUnitVec3, a);
      if (len(tmpvec3) < 0.000001) cross(tmpvec3, yUnitVec3, a);
      normalize$2(tmpvec3, tmpvec3);
      setAxisAngle(out, tmpvec3, Math.PI);
      return out;
    } else if (dot > 0.999999) {
      out[0] = 0;
      out[1] = 0;
      out[2] = 0;
      out[3] = 1;
      return out;
    } else {
      cross(tmpvec3, a, b);
      out[0] = tmpvec3[0];
      out[1] = tmpvec3[1];
      out[2] = tmpvec3[2];
      out[3] = 1 + dot;
      return normalize(out, out);
    }
  };
}();
/**
 * Performs a spherical linear interpolation with two control points
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {ReadonlyQuat} c the third operand
 * @param {ReadonlyQuat} d the fourth operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */

(function () {
  var temp1 = create();
  var temp2 = create();
  return function (out, a, b, c, d, t) {
    slerp(temp1, a, d, t);
    slerp(temp2, b, c, t);
    slerp(out, temp1, temp2, 2 * t * (1 - t));
    return out;
  };
})();
/**
 * Sets the specified quaternion with values corresponding to the given
 * axes. Each axis is a vec3 and is expected to be unit length and
 * perpendicular to all other specified axes.
 *
 * @param {ReadonlyVec3} view  the vector representing the viewing direction
 * @param {ReadonlyVec3} right the vector representing the local "right" direction
 * @param {ReadonlyVec3} up    the vector representing the local "up" direction
 * @returns {quat} out
 */

(function () {
  var matr = create$2();
  return function (out, view, right, up) {
    matr[0] = right[0];
    matr[3] = right[1];
    matr[6] = right[2];
    matr[1] = up[0];
    matr[4] = up[1];
    matr[7] = up[2];
    matr[2] = -view[0];
    matr[5] = -view[1];
    matr[8] = -view[2];
    return normalize(out, fromMat3(out, matr));
  };
})();

const IDENTITY_QUATERNION = [0, 0, 0, 1];
class Quaternion extends MathArray {
  constructor(x = 0, y = 0, z = 0, w = 1) {
    super(-0, -0, -0, -0);

    if (Array.isArray(x) && arguments.length === 1) {
      this.copy(x);
    } else {
      this.set(x, y, z, w);
    }
  }

  copy(array) {
    this[0] = array[0];
    this[1] = array[1];
    this[2] = array[2];
    this[3] = array[3];
    return this.check();
  }

  set(x, y, z, w) {
    this[0] = x;
    this[1] = y;
    this[2] = z;
    this[3] = w;
    return this.check();
  }

  fromObject(object) {
    this[0] = object.x;
    this[1] = object.y;
    this[2] = object.z;
    this[3] = object.w;
    return this.check();
  }

  fromMatrix3(m) {
    fromMat3(this, m);
    return this.check();
  }

  fromAxisRotation(axis, rad) {
    setAxisAngle(this, axis, rad);
    return this.check();
  }

  identity() {
    identity$1(this);
    return this.check();
  }

  setAxisAngle(axis, rad) {
    return this.fromAxisRotation(axis, rad);
  }

  get ELEMENTS() {
    return 4;
  }

  get x() {
    return this[0];
  }

  set x(value) {
    this[0] = checkNumber(value);
  }

  get y() {
    return this[1];
  }

  set y(value) {
    this[1] = checkNumber(value);
  }

  get z() {
    return this[2];
  }

  set z(value) {
    this[2] = checkNumber(value);
  }

  get w() {
    return this[3];
  }

  set w(value) {
    this[3] = checkNumber(value);
  }

  len() {
    return length(this);
  }

  lengthSquared() {
    return squaredLength(this);
  }

  dot(a) {
    return dot(this, a);
  }

  rotationTo(vectorA, vectorB) {
    rotationTo(this, vectorA, vectorB);
    return this.check();
  }

  add(a) {
    add(this, this, a);
    return this.check();
  }

  calculateW() {
    calculateW(this, this);
    return this.check();
  }

  conjugate() {
    conjugate(this, this);
    return this.check();
  }

  invert() {
    invert(this, this);
    return this.check();
  }

  lerp(a, b, t) {
    if (t === undefined) {
      return this.lerp(this, a, b);
    }

    lerp(this, a, b, t);
    return this.check();
  }

  multiplyRight(a) {
    multiply(this, this, a);
    return this.check();
  }

  multiplyLeft(a) {
    multiply(this, a, this);
    return this.check();
  }

  normalize() {
    const length = this.len();
    const l = length > 0 ? 1 / length : 0;
    this[0] = this[0] * l;
    this[1] = this[1] * l;
    this[2] = this[2] * l;
    this[3] = this[3] * l;

    if (length === 0) {
      this[3] = 1;
    }

    return this.check();
  }

  rotateX(rad) {
    rotateX(this, this, rad);
    return this.check();
  }

  rotateY(rad) {
    rotateY(this, this, rad);
    return this.check();
  }

  rotateZ(rad) {
    rotateZ(this, this, rad);
    return this.check();
  }

  scale(b) {
    scale(this, this, b);
    return this.check();
  }

  slerp(arg0, arg1, arg2) {
    let start;
    let target;
    let ratio;

    switch (arguments.length) {
      case 1:
        ({
          start = IDENTITY_QUATERNION,
          target,
          ratio
        } = arg0);
        break;

      case 2:
        start = this;
        target = arg0;
        ratio = arg1;
        break;

      default:
        start = arg0;
        target = arg1;
        ratio = arg2;
    }

    slerp(this, start, target, ratio);
    return this.check();
  }

  transformVector4(vector, result = new Vector4()) {
    transformQuat(result, vector, this);
    return checkVector(result, 4);
  }

  lengthSq() {
    return this.lengthSquared();
  }

  setFromAxisAngle(axis, rad) {
    return this.setAxisAngle(axis, rad);
  }

  premultiply(a) {
    return this.multiplyLeft(a);
  }

  multiply(a) {
    return this.multiplyRight(a);
  }

}

var _MathUtils = {
  EPSILON1: 1e-1,
  EPSILON2: 1e-2,
  EPSILON3: 1e-3,
  EPSILON4: 1e-4,
  EPSILON5: 1e-5,
  EPSILON6: 1e-6,
  EPSILON7: 1e-7,
  EPSILON8: 1e-8,
  EPSILON9: 1e-9,
  EPSILON10: 1e-10,
  EPSILON11: 1e-11,
  EPSILON12: 1e-12,
  EPSILON13: 1e-13,
  EPSILON14: 1e-14,
  EPSILON15: 1e-15,
  EPSILON16: 1e-16,
  EPSILON17: 1e-17,
  EPSILON18: 1e-18,
  EPSILON19: 1e-19,
  EPSILON20: 1e-20,
  PI_OVER_TWO: Math.PI / 2,
  PI_OVER_FOUR: Math.PI / 4,
  PI_OVER_SIX: Math.PI / 6,
  TWO_PI: Math.PI * 2
};

const WGS84_RADIUS_X$1 = 6378137.0;
const WGS84_RADIUS_Y$1 = 6378137.0;
const WGS84_RADIUS_Z$1 = 6356752.3142451793;

function identity(x) {
  return x;
}

new Vector3();
function fromCartographic(cartographic, result = [], map = identity) {
  if ('longitude' in cartographic) {
    result[0] = map(cartographic.longitude);
    result[1] = map(cartographic.latitude);
    result[2] = cartographic.height;
  } else if ('x' in cartographic) {
    result[0] = map(cartographic.x);
    result[1] = map(cartographic.y);
    result[2] = cartographic.z;
  } else {
    result[0] = map(cartographic[0]);
    result[1] = map(cartographic[1]);
    result[2] = cartographic[2];
  }

  return result;
}
function fromCartographicToRadians(cartographic, vector = []) {
  return fromCartographic(cartographic, vector, config._cartographicRadians ? identity : toRadians);
}
function toCartographic(vector, cartographic, map = identity) {
  if ('longitude' in cartographic) {
    cartographic.longitude = map(vector[0]);
    cartographic.latitude = map(vector[1]);
    cartographic.height = vector[2];
  } else if ('x' in cartographic) {
    cartographic.x = map(vector[0]);
    cartographic.y = map(vector[1]);
    cartographic.z = vector[2];
  } else {
    cartographic[0] = map(vector[0]);
    cartographic[1] = map(vector[1]);
    cartographic[2] = vector[2];
  }

  return cartographic;
}
function toCartographicFromRadians(vector, cartographic) {
  return toCartographic(vector, cartographic, config._cartographicRadians ? identity : toDegrees);
}

const scratchVector$5 = new Vector3();
const scaleToGeodeticSurfaceIntersection = new Vector3();
const scaleToGeodeticSurfaceGradient = new Vector3();
function scaleToGeodeticSurface(cartesian, ellipsoid, result = []) {
  const {
    oneOverRadii,
    oneOverRadiiSquared,
    centerToleranceSquared
  } = ellipsoid;
  scratchVector$5.from(cartesian);
  const positionX = scratchVector$5.x;
  const positionY = scratchVector$5.y;
  const positionZ = scratchVector$5.z;
  const oneOverRadiiX = oneOverRadii.x;
  const oneOverRadiiY = oneOverRadii.y;
  const oneOverRadiiZ = oneOverRadii.z;
  const x2 = positionX * positionX * oneOverRadiiX * oneOverRadiiX;
  const y2 = positionY * positionY * oneOverRadiiY * oneOverRadiiY;
  const z2 = positionZ * positionZ * oneOverRadiiZ * oneOverRadiiZ;
  const squaredNorm = x2 + y2 + z2;
  const ratio = Math.sqrt(1.0 / squaredNorm);

  if (!Number.isFinite(ratio)) {
    return undefined;
  }

  const intersection = scaleToGeodeticSurfaceIntersection;
  intersection.copy(cartesian).scale(ratio);

  if (squaredNorm < centerToleranceSquared) {
    return intersection.to(result);
  }

  const oneOverRadiiSquaredX = oneOverRadiiSquared.x;
  const oneOverRadiiSquaredY = oneOverRadiiSquared.y;
  const oneOverRadiiSquaredZ = oneOverRadiiSquared.z;
  const gradient = scaleToGeodeticSurfaceGradient;
  gradient.set(intersection.x * oneOverRadiiSquaredX * 2.0, intersection.y * oneOverRadiiSquaredY * 2.0, intersection.z * oneOverRadiiSquaredZ * 2.0);
  let lambda = (1.0 - ratio) * scratchVector$5.len() / (0.5 * gradient.len());
  let correction = 0.0;
  let xMultiplier;
  let yMultiplier;
  let zMultiplier;
  let func;

  do {
    lambda -= correction;
    xMultiplier = 1.0 / (1.0 + lambda * oneOverRadiiSquaredX);
    yMultiplier = 1.0 / (1.0 + lambda * oneOverRadiiSquaredY);
    zMultiplier = 1.0 / (1.0 + lambda * oneOverRadiiSquaredZ);
    const xMultiplier2 = xMultiplier * xMultiplier;
    const yMultiplier2 = yMultiplier * yMultiplier;
    const zMultiplier2 = zMultiplier * zMultiplier;
    const xMultiplier3 = xMultiplier2 * xMultiplier;
    const yMultiplier3 = yMultiplier2 * yMultiplier;
    const zMultiplier3 = zMultiplier2 * zMultiplier;
    func = x2 * xMultiplier2 + y2 * yMultiplier2 + z2 * zMultiplier2 - 1.0;
    const denominator = x2 * xMultiplier3 * oneOverRadiiSquaredX + y2 * yMultiplier3 * oneOverRadiiSquaredY + z2 * zMultiplier3 * oneOverRadiiSquaredZ;
    const derivative = -2.0 * denominator;
    correction = func / derivative;
  } while (Math.abs(func) > _MathUtils.EPSILON12);

  return scratchVector$5.scale([xMultiplier, yMultiplier, zMultiplier]).to(result);
}

const EPSILON14 = 1e-14;
const scratchOrigin = new Vector3();
const VECTOR_PRODUCT_LOCAL_FRAME = {
  up: {
    south: 'east',
    north: 'west',
    west: 'south',
    east: 'north'
  },
  down: {
    south: 'west',
    north: 'east',
    west: 'north',
    east: 'south'
  },
  south: {
    up: 'west',
    down: 'east',
    west: 'down',
    east: 'up'
  },
  north: {
    up: 'east',
    down: 'west',
    west: 'up',
    east: 'down'
  },
  west: {
    up: 'north',
    down: 'south',
    north: 'down',
    south: 'up'
  },
  east: {
    up: 'south',
    down: 'north',
    north: 'up',
    south: 'down'
  }
};
const degeneratePositionLocalFrame = {
  north: [-1, 0, 0],
  east: [0, 1, 0],
  up: [0, 0, 1],
  south: [1, 0, 0],
  west: [0, -1, 0],
  down: [0, 0, -1]
};
const scratchAxisVectors = {
  east: new Vector3(),
  north: new Vector3(),
  up: new Vector3(),
  west: new Vector3(),
  south: new Vector3(),
  down: new Vector3()
};
const scratchVector1 = new Vector3();
const scratchVector2$1 = new Vector3();
const scratchVector3$1 = new Vector3();
function localFrameToFixedFrame(ellipsoid, firstAxis, secondAxis, thirdAxis, cartesianOrigin, result) {
  const thirdAxisInferred = VECTOR_PRODUCT_LOCAL_FRAME[firstAxis] && VECTOR_PRODUCT_LOCAL_FRAME[firstAxis][secondAxis];
  assert$4(thirdAxisInferred && (!thirdAxis || thirdAxis === thirdAxisInferred));
  let firstAxisVector;
  let secondAxisVector;
  let thirdAxisVector;
  const origin = scratchOrigin.copy(cartesianOrigin);
  const atPole = equals(origin.x, 0.0, EPSILON14) && equals(origin.y, 0.0, EPSILON14);

  if (atPole) {
    const sign = Math.sign(origin.z);
    firstAxisVector = scratchVector1.fromArray(degeneratePositionLocalFrame[firstAxis]);

    if (firstAxis !== 'east' && firstAxis !== 'west') {
      firstAxisVector.scale(sign);
    }

    secondAxisVector = scratchVector2$1.fromArray(degeneratePositionLocalFrame[secondAxis]);

    if (secondAxis !== 'east' && secondAxis !== 'west') {
      secondAxisVector.scale(sign);
    }

    thirdAxisVector = scratchVector3$1.fromArray(degeneratePositionLocalFrame[thirdAxis]);

    if (thirdAxis !== 'east' && thirdAxis !== 'west') {
      thirdAxisVector.scale(sign);
    }
  } else {
    const {
      up,
      east,
      north
    } = scratchAxisVectors;
    east.set(-origin.y, origin.x, 0.0).normalize();
    ellipsoid.geodeticSurfaceNormal(origin, up);
    north.copy(up).cross(east);
    const {
      down,
      west,
      south
    } = scratchAxisVectors;
    down.copy(up).scale(-1);
    west.copy(east).scale(-1);
    south.copy(north).scale(-1);
    firstAxisVector = scratchAxisVectors[firstAxis];
    secondAxisVector = scratchAxisVectors[secondAxis];
    thirdAxisVector = scratchAxisVectors[thirdAxis];
  }

  result[0] = firstAxisVector.x;
  result[1] = firstAxisVector.y;
  result[2] = firstAxisVector.z;
  result[3] = 0.0;
  result[4] = secondAxisVector.x;
  result[5] = secondAxisVector.y;
  result[6] = secondAxisVector.z;
  result[7] = 0.0;
  result[8] = thirdAxisVector.x;
  result[9] = thirdAxisVector.y;
  result[10] = thirdAxisVector.z;
  result[11] = 0.0;
  result[12] = origin.x;
  result[13] = origin.y;
  result[14] = origin.z;
  result[15] = 1.0;
  return result;
}

const scratchVector$4 = new Vector3();
const scratchNormal$2 = new Vector3();
const scratchK = new Vector3();
const scratchPosition$2 = new Vector3();
const scratchHeight = new Vector3();
const scratchCartesian = new Vector3();
class Ellipsoid {
  constructor(x = 0.0, y = 0.0, z = 0.0) {
    _defineProperty(this, "radii", void 0);

    _defineProperty(this, "radiiSquared", void 0);

    _defineProperty(this, "radiiToTheFourth", void 0);

    _defineProperty(this, "oneOverRadii", void 0);

    _defineProperty(this, "oneOverRadiiSquared", void 0);

    _defineProperty(this, "minimumRadius", void 0);

    _defineProperty(this, "maximumRadius", void 0);

    _defineProperty(this, "centerToleranceSquared", _MathUtils.EPSILON1);

    _defineProperty(this, "squaredXOverSquaredZ", void 0);

    assert$4(x >= 0.0);
    assert$4(y >= 0.0);
    assert$4(z >= 0.0);
    this.radii = new Vector3(x, y, z);
    this.radiiSquared = new Vector3(x * x, y * y, z * z);
    this.radiiToTheFourth = new Vector3(x * x * x * x, y * y * y * y, z * z * z * z);
    this.oneOverRadii = new Vector3(x === 0.0 ? 0.0 : 1.0 / x, y === 0.0 ? 0.0 : 1.0 / y, z === 0.0 ? 0.0 : 1.0 / z);
    this.oneOverRadiiSquared = new Vector3(x === 0.0 ? 0.0 : 1.0 / (x * x), y === 0.0 ? 0.0 : 1.0 / (y * y), z === 0.0 ? 0.0 : 1.0 / (z * z));
    this.minimumRadius = Math.min(x, y, z);
    this.maximumRadius = Math.max(x, y, z);

    if (this.radiiSquared.z !== 0) {
      this.squaredXOverSquaredZ = this.radiiSquared.x / this.radiiSquared.z;
    }

    Object.freeze(this);
  }

  equals(right) {
    return this === right || Boolean(right && this.radii.equals(right.radii));
  }

  toString() {
    return this.radii.toString();
  }

  cartographicToCartesian(cartographic, result = [0, 0, 0]) {
    const normal = scratchNormal$2;
    const k = scratchK;
    const [,, height] = cartographic;
    this.geodeticSurfaceNormalCartographic(cartographic, normal);
    k.copy(this.radiiSquared).scale(normal);
    const gamma = Math.sqrt(normal.dot(k));
    k.scale(1 / gamma);
    normal.scale(height);
    k.add(normal);
    return k.to(result);
  }

  cartesianToCartographic(cartesian, result = [0, 0, 0]) {
    scratchCartesian.from(cartesian);
    const point = this.scaleToGeodeticSurface(scratchCartesian, scratchPosition$2);

    if (!point) {
      return undefined;
    }

    const normal = this.geodeticSurfaceNormal(point, scratchNormal$2);
    const h = scratchHeight;
    h.copy(scratchCartesian).subtract(point);
    const longitude = Math.atan2(normal.y, normal.x);
    const latitude = Math.asin(normal.z);
    const height = Math.sign(dot$2(h, scratchCartesian)) * length$2(h);
    return toCartographicFromRadians([longitude, latitude, height], result);
  }

  eastNorthUpToFixedFrame(origin, result = new Matrix4()) {
    return localFrameToFixedFrame(this, 'east', 'north', 'up', origin, result);
  }

  localFrameToFixedFrame(firstAxis, secondAxis, thirdAxis, origin, result = new Matrix4()) {
    return localFrameToFixedFrame(this, firstAxis, secondAxis, thirdAxis, origin, result);
  }

  geocentricSurfaceNormal(cartesian, result = [0, 0, 0]) {
    return scratchVector$4.from(cartesian).normalize().to(result);
  }

  geodeticSurfaceNormalCartographic(cartographic, result = [0, 0, 0]) {
    const cartographicVectorRadians = fromCartographicToRadians(cartographic);
    const longitude = cartographicVectorRadians[0];
    const latitude = cartographicVectorRadians[1];
    const cosLatitude = Math.cos(latitude);
    scratchVector$4.set(cosLatitude * Math.cos(longitude), cosLatitude * Math.sin(longitude), Math.sin(latitude)).normalize();
    return scratchVector$4.to(result);
  }

  geodeticSurfaceNormal(cartesian, result = [0, 0, 0]) {
    return scratchVector$4.from(cartesian).scale(this.oneOverRadiiSquared).normalize().to(result);
  }

  scaleToGeodeticSurface(cartesian, result) {
    return scaleToGeodeticSurface(cartesian, this, result);
  }

  scaleToGeocentricSurface(cartesian, result = [0, 0, 0]) {
    scratchPosition$2.from(cartesian);
    const positionX = scratchPosition$2.x;
    const positionY = scratchPosition$2.y;
    const positionZ = scratchPosition$2.z;
    const oneOverRadiiSquared = this.oneOverRadiiSquared;
    const beta = 1.0 / Math.sqrt(positionX * positionX * oneOverRadiiSquared.x + positionY * positionY * oneOverRadiiSquared.y + positionZ * positionZ * oneOverRadiiSquared.z);
    return scratchPosition$2.multiplyScalar(beta).to(result);
  }

  transformPositionToScaledSpace(position, result = [0, 0, 0]) {
    return scratchPosition$2.from(position).scale(this.oneOverRadii).to(result);
  }

  transformPositionFromScaledSpace(position, result = [0, 0, 0]) {
    return scratchPosition$2.from(position).scale(this.radii).to(result);
  }

  getSurfaceNormalIntersectionWithZAxis(position, buffer = 0, result = [0, 0, 0]) {
    assert$4(equals(this.radii.x, this.radii.y, _MathUtils.EPSILON15));
    assert$4(this.radii.z > 0);
    scratchPosition$2.from(position);
    const z = scratchPosition$2.z * (1 - this.squaredXOverSquaredZ);

    if (Math.abs(z) >= this.radii.z - buffer) {
      return undefined;
    }

    return scratchPosition$2.set(0.0, 0.0, z).to(result);
  }

}

_defineProperty(Ellipsoid, "WGS84", new Ellipsoid(WGS84_RADIUS_X$1, WGS84_RADIUS_Y$1, WGS84_RADIUS_Z$1));

class DoublyLinkedListNode {
  constructor(item, previous, next) {
    _defineProperty(this, "item", void 0);

    _defineProperty(this, "previous", void 0);

    _defineProperty(this, "next", void 0);

    this.item = item;
    this.previous = previous;
    this.next = next;
  }

}

class DoublyLinkedList {
  constructor() {
    _defineProperty(this, "head", null);

    _defineProperty(this, "tail", null);

    _defineProperty(this, "_length", 0);
  }

  get length() {
    return this._length;
  }

  add(item) {
    const node = new DoublyLinkedListNode(item, this.tail, null);

    if (this.tail) {
      this.tail.next = node;
      this.tail = node;
    } else {
      this.head = node;
      this.tail = node;
    }

    ++this._length;
    return node;
  }

  remove(node) {
    if (!node) {
      return;
    }

    if (node.previous && node.next) {
      node.previous.next = node.next;
      node.next.previous = node.previous;
    } else if (node.previous) {
      node.previous.next = null;
      this.tail = node.previous;
    } else if (node.next) {
      node.next.previous = null;
      this.head = node.next;
    } else {
      this.head = null;
      this.tail = null;
    }

    node.next = null;
    node.previous = null;
    --this._length;
  }

  splice(node, nextNode) {
    if (node === nextNode) {
      return;
    }

    this.remove(nextNode);

    this._insert(node, nextNode);
  }

  _insert(node, nextNode) {
    const oldNodeNext = node.next;
    node.next = nextNode;

    if (this.tail === node) {
      this.tail = nextNode;
    } else {
      oldNodeNext.previous = nextNode;
    }

    nextNode.next = oldNodeNext;
    nextNode.previous = node;
    ++this._length;
  }

}

function defined$5(x) {
  return x !== undefined && x !== null;
}

class TilesetCache {
  constructor() {
    _defineProperty(this, "_list", void 0);

    _defineProperty(this, "_sentinel", void 0);

    _defineProperty(this, "_trimTiles", void 0);

    this._list = new DoublyLinkedList();
    this._sentinel = this._list.add('sentinel');
    this._trimTiles = false;
  }

  reset() {
    this._list.splice(this._list.tail, this._sentinel);
  }

  touch(tile) {
    const node = tile._cacheNode;

    if (defined$5(node)) {
      this._list.splice(this._sentinel, node);
    }
  }

  add(tileset, tile, addCallback) {
    if (!defined$5(tile._cacheNode)) {
      tile._cacheNode = this._list.add(tile);

      if (addCallback) {
        addCallback(tileset, tile);
      }
    }
  }

  unloadTile(tileset, tile, unloadCallback) {
    const node = tile._cacheNode;

    if (!defined$5(node)) {
      return;
    }

    this._list.remove(node);

    tile._cacheNode = undefined;

    if (unloadCallback) {
      unloadCallback(tileset, tile);
    }
  }

  unloadTiles(tileset, unloadCallback) {
    const trimTiles = this._trimTiles;
    this._trimTiles = false;
    const list = this._list;
    const maximumMemoryUsageInBytes = tileset.maximumMemoryUsage * 1024 * 1024;
    const sentinel = this._sentinel;
    let node = list.head;

    while (node !== sentinel && (tileset.gpuMemoryUsageInBytes > maximumMemoryUsageInBytes || trimTiles)) {
      const tile = node.item;
      node = node.next;
      this.unloadTile(tileset, tile, unloadCallback);
    }
  }

  trim() {
    this._trimTiles = true;
  }

}

function calculateTransformProps(tileHeader, tile) {
  assert$7(tileHeader);
  assert$7(tile);
  const {
    rtcCenter,
    gltfUpAxis
  } = tile;
  const {
    computedTransform,
    boundingVolume: {
      center
    }
  } = tileHeader;
  let modelMatrix = new Matrix4(computedTransform);

  if (rtcCenter) {
    modelMatrix.translate(rtcCenter);
  }

  switch (gltfUpAxis) {
    case 'Z':
      break;

    case 'Y':
      const rotationY = new Matrix4().rotateX(Math.PI / 2);
      modelMatrix = modelMatrix.multiplyRight(rotationY);
      break;

    case 'X':
      const rotationX = new Matrix4().rotateY(-Math.PI / 2);
      modelMatrix = modelMatrix.multiplyRight(rotationX);
      break;
  }

  if (tile.isQuantized) {
    modelMatrix.translate(tile.quantizedVolumeOffset).scale(tile.quantizedVolumeScale);
  }

  const cartesianOrigin = new Vector3(center);
  tile.cartesianModelMatrix = modelMatrix;
  tile.cartesianOrigin = cartesianOrigin;
  const cartographicOrigin = Ellipsoid.WGS84.cartesianToCartographic(cartesianOrigin, new Vector3());
  const fromFixedFrameMatrix = Ellipsoid.WGS84.eastNorthUpToFixedFrame(cartesianOrigin);
  const toFixedFrameMatrix = fromFixedFrameMatrix.invert();
  tile.cartographicModelMatrix = toFixedFrameMatrix.multiplyRight(modelMatrix);
  tile.cartographicOrigin = cartographicOrigin;

  if (!tile.coordinateSystem) {
    tile.modelMatrix = tile.cartographicModelMatrix;
  }
}

const INTERSECTION = {
  OUTSIDE: -1,
  INTERSECTING: 0,
  INSIDE: 1
};

new Vector3();
new Vector3();

const scratchVector$3 = new Vector3();
const scratchVector2 = new Vector3();
class BoundingSphere {
  constructor(center = [0, 0, 0], radius = 0.0) {
    _defineProperty(this, "center", void 0);

    _defineProperty(this, "radius", void 0);

    this.radius = -0;
    this.center = new Vector3();
    this.fromCenterRadius(center, radius);
  }

  fromCenterRadius(center, radius) {
    this.center.from(center);
    this.radius = radius;
    return this;
  }

  fromCornerPoints(corner, oppositeCorner) {
    oppositeCorner = scratchVector$3.from(oppositeCorner);
    this.center = new Vector3().from(corner).add(oppositeCorner).scale(0.5);
    this.radius = this.center.distance(oppositeCorner);
    return this;
  }

  equals(right) {
    return this === right || Boolean(right) && this.center.equals(right.center) && this.radius === right.radius;
  }

  clone() {
    return new BoundingSphere(this.center, this.radius);
  }

  union(boundingSphere) {
    const leftCenter = this.center;
    const leftRadius = this.radius;
    const rightCenter = boundingSphere.center;
    const rightRadius = boundingSphere.radius;
    const toRightCenter = scratchVector$3.copy(rightCenter).subtract(leftCenter);
    const centerSeparation = toRightCenter.magnitude();

    if (leftRadius >= centerSeparation + rightRadius) {
      return this.clone();
    }

    if (rightRadius >= centerSeparation + leftRadius) {
      return boundingSphere.clone();
    }

    const halfDistanceBetweenTangentPoints = (leftRadius + centerSeparation + rightRadius) * 0.5;
    scratchVector2.copy(toRightCenter).scale((-leftRadius + halfDistanceBetweenTangentPoints) / centerSeparation).add(leftCenter);
    this.center.copy(scratchVector2);
    this.radius = halfDistanceBetweenTangentPoints;
    return this;
  }

  expand(point) {
    const scratchPoint = scratchVector$3.from(point);
    const radius = scratchPoint.subtract(this.center).magnitude();

    if (radius > this.radius) {
      this.radius = radius;
    }

    return this;
  }

  transform(transform) {
    this.center.transform(transform);
    const scale = getScaling(scratchVector$3, transform);
    this.radius = Math.max(scale[0], Math.max(scale[1], scale[2])) * this.radius;
    return this;
  }

  distanceSquaredTo(point) {
    const d = this.distanceTo(point);
    return d * d;
  }

  distanceTo(point) {
    const scratchPoint = scratchVector$3.from(point);
    const delta = scratchPoint.subtract(this.center);
    return Math.max(0, delta.len() - this.radius);
  }

  intersectPlane(plane) {
    const center = this.center;
    const radius = this.radius;
    const normal = plane.normal;
    const distanceToPlane = normal.dot(center) + plane.distance;

    if (distanceToPlane < -radius) {
      return INTERSECTION.OUTSIDE;
    }

    if (distanceToPlane < radius) {
      return INTERSECTION.INTERSECTING;
    }

    return INTERSECTION.INSIDE;
  }

}

const scratchVector3 = new Vector3();
const scratchOffset = new Vector3();
const scratchVectorU = new Vector3();
const scratchVectorV = new Vector3();
const scratchVectorW = new Vector3();
const scratchCorner = new Vector3();
const scratchToCenter = new Vector3();
const MATRIX3 = {
  COLUMN0ROW0: 0,
  COLUMN0ROW1: 1,
  COLUMN0ROW2: 2,
  COLUMN1ROW0: 3,
  COLUMN1ROW1: 4,
  COLUMN1ROW2: 5,
  COLUMN2ROW0: 6,
  COLUMN2ROW1: 7,
  COLUMN2ROW2: 8
};
class OrientedBoundingBox {
  constructor(center = [0, 0, 0], halfAxes = [0, 0, 0, 0, 0, 0, 0, 0, 0]) {
    _defineProperty(this, "center", void 0);

    _defineProperty(this, "halfAxes", void 0);

    this.center = new Vector3().from(center);
    this.halfAxes = new Matrix3(halfAxes);
  }

  get halfSize() {
    const xAxis = this.halfAxes.getColumn(0);
    const yAxis = this.halfAxes.getColumn(1);
    const zAxis = this.halfAxes.getColumn(2);
    return [new Vector3(xAxis).len(), new Vector3(yAxis).len(), new Vector3(zAxis).len()];
  }

  get quaternion() {
    const xAxis = this.halfAxes.getColumn(0);
    const yAxis = this.halfAxes.getColumn(1);
    const zAxis = this.halfAxes.getColumn(2);
    const normXAxis = new Vector3(xAxis).normalize();
    const normYAxis = new Vector3(yAxis).normalize();
    const normZAxis = new Vector3(zAxis).normalize();
    return new Quaternion().fromMatrix3(new Matrix3([...normXAxis, ...normYAxis, ...normZAxis]));
  }

  fromCenterHalfSizeQuaternion(center, halfSize, quaternion) {
    const quaternionObject = new Quaternion(quaternion);
    const directionsMatrix = new Matrix3().fromQuaternion(quaternionObject);
    directionsMatrix[0] = directionsMatrix[0] * halfSize[0];
    directionsMatrix[1] = directionsMatrix[1] * halfSize[0];
    directionsMatrix[2] = directionsMatrix[2] * halfSize[0];
    directionsMatrix[3] = directionsMatrix[3] * halfSize[1];
    directionsMatrix[4] = directionsMatrix[4] * halfSize[1];
    directionsMatrix[5] = directionsMatrix[5] * halfSize[1];
    directionsMatrix[6] = directionsMatrix[6] * halfSize[2];
    directionsMatrix[7] = directionsMatrix[7] * halfSize[2];
    directionsMatrix[8] = directionsMatrix[8] * halfSize[2];
    this.center = new Vector3().from(center);
    this.halfAxes = directionsMatrix;
    return this;
  }

  clone() {
    return new OrientedBoundingBox(this.center, this.halfAxes);
  }

  equals(right) {
    return this === right || Boolean(right) && this.center.equals(right.center) && this.halfAxes.equals(right.halfAxes);
  }

  getBoundingSphere(result = new BoundingSphere()) {
    const halfAxes = this.halfAxes;
    const u = halfAxes.getColumn(0, scratchVectorU);
    const v = halfAxes.getColumn(1, scratchVectorV);
    const w = halfAxes.getColumn(2, scratchVectorW);
    const cornerVector = scratchVector3.copy(u).add(v).add(w);
    result.center.copy(this.center);
    result.radius = cornerVector.magnitude();
    return result;
  }

  intersectPlane(plane) {
    const center = this.center;
    const normal = plane.normal;
    const halfAxes = this.halfAxes;
    const normalX = normal.x;
    const normalY = normal.y;
    const normalZ = normal.z;
    const radEffective = Math.abs(normalX * halfAxes[MATRIX3.COLUMN0ROW0] + normalY * halfAxes[MATRIX3.COLUMN0ROW1] + normalZ * halfAxes[MATRIX3.COLUMN0ROW2]) + Math.abs(normalX * halfAxes[MATRIX3.COLUMN1ROW0] + normalY * halfAxes[MATRIX3.COLUMN1ROW1] + normalZ * halfAxes[MATRIX3.COLUMN1ROW2]) + Math.abs(normalX * halfAxes[MATRIX3.COLUMN2ROW0] + normalY * halfAxes[MATRIX3.COLUMN2ROW1] + normalZ * halfAxes[MATRIX3.COLUMN2ROW2]);
    const distanceToPlane = normal.dot(center) + plane.distance;

    if (distanceToPlane <= -radEffective) {
      return INTERSECTION.OUTSIDE;
    } else if (distanceToPlane >= radEffective) {
      return INTERSECTION.INSIDE;
    }

    return INTERSECTION.INTERSECTING;
  }

  distanceTo(point) {
    return Math.sqrt(this.distanceSquaredTo(point));
  }

  distanceSquaredTo(point) {
    const offset = scratchOffset.from(point).subtract(this.center);
    const halfAxes = this.halfAxes;
    const u = halfAxes.getColumn(0, scratchVectorU);
    const v = halfAxes.getColumn(1, scratchVectorV);
    const w = halfAxes.getColumn(2, scratchVectorW);
    const uHalf = u.magnitude();
    const vHalf = v.magnitude();
    const wHalf = w.magnitude();
    u.normalize();
    v.normalize();
    w.normalize();
    let distanceSquared = 0.0;
    let d;
    d = Math.abs(offset.dot(u)) - uHalf;

    if (d > 0) {
      distanceSquared += d * d;
    }

    d = Math.abs(offset.dot(v)) - vHalf;

    if (d > 0) {
      distanceSquared += d * d;
    }

    d = Math.abs(offset.dot(w)) - wHalf;

    if (d > 0) {
      distanceSquared += d * d;
    }

    return distanceSquared;
  }

  computePlaneDistances(position, direction, result = [-0, -0]) {
    let minDist = Number.POSITIVE_INFINITY;
    let maxDist = Number.NEGATIVE_INFINITY;
    const center = this.center;
    const halfAxes = this.halfAxes;
    const u = halfAxes.getColumn(0, scratchVectorU);
    const v = halfAxes.getColumn(1, scratchVectorV);
    const w = halfAxes.getColumn(2, scratchVectorW);
    const corner = scratchCorner.copy(u).add(v).add(w).add(center);
    const toCenter = scratchToCenter.copy(corner).subtract(position);
    let mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    corner.copy(center).add(u).add(v).subtract(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    corner.copy(center).add(u).subtract(v).add(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    corner.copy(center).add(u).subtract(v).subtract(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    center.copy(corner).subtract(u).add(v).add(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    center.copy(corner).subtract(u).add(v).subtract(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    center.copy(corner).subtract(u).subtract(v).add(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    center.copy(corner).subtract(u).subtract(v).subtract(w);
    toCenter.copy(corner).subtract(position);
    mag = direction.dot(toCenter);
    minDist = Math.min(mag, minDist);
    maxDist = Math.max(mag, maxDist);
    result[0] = minDist;
    result[1] = maxDist;
    return result;
  }

  transform(transformation) {
    this.center.transformAsPoint(transformation);
    const xAxis = this.halfAxes.getColumn(0, scratchVectorU);
    xAxis.transformAsPoint(transformation);
    const yAxis = this.halfAxes.getColumn(1, scratchVectorV);
    yAxis.transformAsPoint(transformation);
    const zAxis = this.halfAxes.getColumn(2, scratchVectorW);
    zAxis.transformAsPoint(transformation);
    this.halfAxes = new Matrix3([...xAxis, ...yAxis, ...zAxis]);
    return this;
  }

  getTransform() {
    throw new Error('not implemented');
  }

}

const scratchPosition$1 = new Vector3();
const scratchNormal$1 = new Vector3();
class Plane {
  constructor(normal = [0, 0, 1], distance = 0) {
    _defineProperty(this, "normal", void 0);

    _defineProperty(this, "distance", void 0);

    this.normal = new Vector3();
    this.distance = -0;
    this.fromNormalDistance(normal, distance);
  }

  fromNormalDistance(normal, distance) {
    assert$4(Number.isFinite(distance));
    this.normal.from(normal).normalize();
    this.distance = distance;
    return this;
  }

  fromPointNormal(point, normal) {
    point = scratchPosition$1.from(point);
    this.normal.from(normal).normalize();
    const distance = -this.normal.dot(point);
    this.distance = distance;
    return this;
  }

  fromCoefficients(a, b, c, d) {
    this.normal.set(a, b, c);
    assert$4(equals(this.normal.len(), 1));
    this.distance = d;
    return this;
  }

  clone() {
    return new Plane(this.normal, this.distance);
  }

  equals(right) {
    return equals(this.distance, right.distance) && equals(this.normal, right.normal);
  }

  getPointDistance(point) {
    return this.normal.dot(point) + this.distance;
  }

  transform(matrix4) {
    const normal = scratchNormal$1.copy(this.normal).transformAsVector(matrix4).normalize();
    const point = this.normal.scale(-this.distance).transform(matrix4);
    return this.fromPointNormal(point, normal);
  }

  projectPointOntoPlane(point, result = [0, 0, 0]) {
    point = scratchPosition$1.from(point);
    const pointDistance = this.getPointDistance(point);
    const scaledNormal = scratchNormal$1.copy(this.normal).scale(pointDistance);
    return point.subtract(scaledNormal).to(result);
  }

}

const faces = [new Vector3([1, 0, 0]), new Vector3([0, 1, 0]), new Vector3([0, 0, 1])];
const scratchPlaneCenter = new Vector3();
const scratchPlaneNormal$1 = new Vector3();
new Plane(new Vector3(1.0, 0.0, 0.0), 0.0);
class CullingVolume {
  constructor(planes = []) {
    _defineProperty(this, "planes", void 0);

    this.planes = planes;
  }

  fromBoundingSphere(boundingSphere) {
    this.planes.length = 2 * faces.length;
    const center = boundingSphere.center;
    const radius = boundingSphere.radius;
    let planeIndex = 0;

    for (const faceNormal of faces) {
      let plane0 = this.planes[planeIndex];
      let plane1 = this.planes[planeIndex + 1];

      if (!plane0) {
        plane0 = this.planes[planeIndex] = new Plane();
      }

      if (!plane1) {
        plane1 = this.planes[planeIndex + 1] = new Plane();
      }

      const plane0Center = scratchPlaneCenter.copy(faceNormal).scale(-radius).add(center);
      -faceNormal.dot(plane0Center);
      plane0.fromPointNormal(plane0Center, faceNormal);
      const plane1Center = scratchPlaneCenter.copy(faceNormal).scale(radius).add(center);
      const negatedFaceNormal = scratchPlaneNormal$1.copy(faceNormal).negate();
      -negatedFaceNormal.dot(plane1Center);
      plane1.fromPointNormal(plane1Center, negatedFaceNormal);
      planeIndex += 2;
    }

    return this;
  }

  computeVisibility(boundingVolume) {
    let intersect = INTERSECTION.INSIDE;

    for (const plane of this.planes) {
      const result = boundingVolume.intersectPlane(plane);

      switch (result) {
        case INTERSECTION.OUTSIDE:
          return INTERSECTION.OUTSIDE;

        case INTERSECTION.INTERSECTING:
          intersect = INTERSECTION.INTERSECTING;
          break;
      }
    }

    return intersect;
  }

  computeVisibilityWithPlaneMask(boundingVolume, parentPlaneMask) {
    assert$4(Number.isFinite(parentPlaneMask), 'parentPlaneMask is required.');

    if (parentPlaneMask === CullingVolume.MASK_OUTSIDE || parentPlaneMask === CullingVolume.MASK_INSIDE) {
      return parentPlaneMask;
    }

    let mask = CullingVolume.MASK_INSIDE;
    const planes = this.planes;

    for (let k = 0; k < this.planes.length; ++k) {
      const flag = k < 31 ? 1 << k : 0;

      if (k < 31 && (parentPlaneMask & flag) === 0) {
        continue;
      }

      const plane = planes[k];
      const result = boundingVolume.intersectPlane(plane);

      if (result === INTERSECTION.OUTSIDE) {
        return CullingVolume.MASK_OUTSIDE;
      } else if (result === INTERSECTION.INTERSECTING) {
        mask |= flag;
      }
    }

    return mask;
  }

}

_defineProperty(CullingVolume, "MASK_OUTSIDE", 0xffffffff);

_defineProperty(CullingVolume, "MASK_INSIDE", 0x00000000);

_defineProperty(CullingVolume, "MASK_INDETERMINATE", 0x7fffffff);

const scratchPlaneUpVector = new Vector3();
const scratchPlaneRightVector = new Vector3();
const scratchPlaneNearCenter = new Vector3();
const scratchPlaneFarCenter = new Vector3();
const scratchPlaneNormal = new Vector3();
class PerspectiveOffCenterFrustum {
  constructor(options = {}) {
    _defineProperty(this, "left", void 0);

    _defineProperty(this, "_left", void 0);

    _defineProperty(this, "right", void 0);

    _defineProperty(this, "_right", void 0);

    _defineProperty(this, "top", void 0);

    _defineProperty(this, "_top", void 0);

    _defineProperty(this, "bottom", void 0);

    _defineProperty(this, "_bottom", void 0);

    _defineProperty(this, "near", void 0);

    _defineProperty(this, "_near", void 0);

    _defineProperty(this, "far", void 0);

    _defineProperty(this, "_far", void 0);

    _defineProperty(this, "_cullingVolume", new CullingVolume([new Plane(), new Plane(), new Plane(), new Plane(), new Plane(), new Plane()]));

    _defineProperty(this, "_perspectiveMatrix", new Matrix4());

    _defineProperty(this, "_infinitePerspective", new Matrix4());

    const {
      near = 1.0,
      far = 500000000.0
    } = options;
    this.left = options.left;
    this._left = undefined;
    this.right = options.right;
    this._right = undefined;
    this.top = options.top;
    this._top = undefined;
    this.bottom = options.bottom;
    this._bottom = undefined;
    this.near = near;
    this._near = near;
    this.far = far;
    this._far = far;
  }

  clone() {
    return new PerspectiveOffCenterFrustum({
      right: this.right,
      left: this.left,
      top: this.top,
      bottom: this.bottom,
      near: this.near,
      far: this.far
    });
  }

  equals(other) {
    return other && other instanceof PerspectiveOffCenterFrustum && this.right === other.right && this.left === other.left && this.top === other.top && this.bottom === other.bottom && this.near === other.near && this.far === other.far;
  }

  get projectionMatrix() {
    this._update();

    return this._perspectiveMatrix;
  }

  get infiniteProjectionMatrix() {
    this._update();

    return this._infinitePerspective;
  }

  computeCullingVolume(position, direction, up) {
    assert$4(position, 'position is required.');
    assert$4(direction, 'direction is required.');
    assert$4(up, 'up is required.');
    const planes = this._cullingVolume.planes;
    up = scratchPlaneUpVector.copy(up).normalize();
    const right = scratchPlaneRightVector.copy(direction).cross(up).normalize();
    const nearCenter = scratchPlaneNearCenter.copy(direction).multiplyByScalar(this.near).add(position);
    const farCenter = scratchPlaneFarCenter.copy(direction).multiplyByScalar(this.far).add(position);
    let normal = scratchPlaneNormal;
    normal.copy(right).multiplyByScalar(this.left).add(nearCenter).subtract(position).cross(up);
    planes[0].fromPointNormal(position, normal);
    normal.copy(right).multiplyByScalar(this.right).add(nearCenter).subtract(position).cross(up).negate();
    planes[1].fromPointNormal(position, normal);
    normal.copy(up).multiplyByScalar(this.bottom).add(nearCenter).subtract(position).cross(right).negate();
    planes[2].fromPointNormal(position, normal);
    normal.copy(up).multiplyByScalar(this.top).add(nearCenter).subtract(position).cross(right);
    planes[3].fromPointNormal(position, normal);
    normal = new Vector3().copy(direction);
    planes[4].fromPointNormal(nearCenter, normal);
    normal.negate();
    planes[5].fromPointNormal(farCenter, normal);
    return this._cullingVolume;
  }

  getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) {
    this._update();

    assert$4(Number.isFinite(drawingBufferWidth) && Number.isFinite(drawingBufferHeight));
    assert$4(drawingBufferWidth > 0);
    assert$4(drawingBufferHeight > 0);
    assert$4(distance > 0);
    assert$4(result);
    const inverseNear = 1.0 / this.near;
    let tanTheta = this.top * inverseNear;
    const pixelHeight = 2.0 * distance * tanTheta / drawingBufferHeight;
    tanTheta = this.right * inverseNear;
    const pixelWidth = 2.0 * distance * tanTheta / drawingBufferWidth;
    result.x = pixelWidth;
    result.y = pixelHeight;
    return result;
  }

  _update() {
    assert$4(Number.isFinite(this.right) && Number.isFinite(this.left) && Number.isFinite(this.top) && Number.isFinite(this.bottom) && Number.isFinite(this.near) && Number.isFinite(this.far));
    const {
      top,
      bottom,
      right,
      left,
      near,
      far
    } = this;

    if (top !== this._top || bottom !== this._bottom || left !== this._left || right !== this._right || near !== this._near || far !== this._far) {
      assert$4(this.near > 0 && this.near < this.far, 'near must be greater than zero and less than far.');
      this._left = left;
      this._right = right;
      this._top = top;
      this._bottom = bottom;
      this._near = near;
      this._far = far;
      this._perspectiveMatrix = new Matrix4().frustum({
        left,
        right,
        bottom,
        top,
        near,
        far
      });
      this._infinitePerspective = new Matrix4().frustum({
        left,
        right,
        bottom,
        top,
        near,
        far: Infinity
      });
    }
  }

}

const defined$4 = val => val !== null && typeof val !== 'undefined';

class PerspectiveFrustum {
  constructor(options = {}) {
    _defineProperty(this, "_offCenterFrustum", new PerspectiveOffCenterFrustum());

    _defineProperty(this, "fov", void 0);

    _defineProperty(this, "_fov", void 0);

    _defineProperty(this, "_fovy", void 0);

    _defineProperty(this, "_sseDenominator", void 0);

    _defineProperty(this, "aspectRatio", void 0);

    _defineProperty(this, "_aspectRatio", void 0);

    _defineProperty(this, "near", void 0);

    _defineProperty(this, "_near", void 0);

    _defineProperty(this, "far", void 0);

    _defineProperty(this, "_far", void 0);

    _defineProperty(this, "xOffset", void 0);

    _defineProperty(this, "_xOffset", void 0);

    _defineProperty(this, "yOffset", void 0);

    _defineProperty(this, "_yOffset", void 0);

    const {
      fov,
      aspectRatio,
      near = 1.0,
      far = 500000000.0,
      xOffset = 0.0,
      yOffset = 0.0
    } = options;
    this.fov = fov;
    this.aspectRatio = aspectRatio;
    this.near = near;
    this.far = far;
    this.xOffset = xOffset;
    this.yOffset = yOffset;
  }

  clone() {
    return new PerspectiveFrustum({
      aspectRatio: this.aspectRatio,
      fov: this.fov,
      near: this.near,
      far: this.far
    });
  }

  equals(other) {
    if (!defined$4(other) || !(other instanceof PerspectiveFrustum)) {
      return false;
    }

    this._update();

    other._update();

    return this.fov === other.fov && this.aspectRatio === other.aspectRatio && this.near === other.near && this.far === other.far && this._offCenterFrustum.equals(other._offCenterFrustum);
  }

  get projectionMatrix() {
    this._update();

    return this._offCenterFrustum.projectionMatrix;
  }

  get infiniteProjectionMatrix() {
    this._update();

    return this._offCenterFrustum.infiniteProjectionMatrix;
  }

  get fovy() {
    this._update();

    return this._fovy;
  }

  get sseDenominator() {
    this._update();

    return this._sseDenominator;
  }

  computeCullingVolume(position, direction, up) {
    this._update();

    return this._offCenterFrustum.computeCullingVolume(position, direction, up);
  }

  getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) {
    this._update();

    return this._offCenterFrustum.getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result || new Vector2());
  }

  _update() {
    assert$4(Number.isFinite(this.fov) && Number.isFinite(this.aspectRatio) && Number.isFinite(this.near) && Number.isFinite(this.far));
    const f = this._offCenterFrustum;

    if (this.fov !== this._fov || this.aspectRatio !== this._aspectRatio || this.near !== this._near || this.far !== this._far || this.xOffset !== this._xOffset || this.yOffset !== this._yOffset) {
      assert$4(this.fov >= 0 && this.fov < Math.PI);
      assert$4(this.aspectRatio > 0);
      assert$4(this.near >= 0 && this.near < this.far);
      this._aspectRatio = this.aspectRatio;
      this._fov = this.fov;
      this._fovy = this.aspectRatio <= 1 ? this.fov : Math.atan(Math.tan(this.fov * 0.5) / this.aspectRatio) * 2.0;
      this._near = this.near;
      this._far = this.far;
      this._sseDenominator = 2.0 * Math.tan(0.5 * this._fovy);
      this._xOffset = this.xOffset;
      this._yOffset = this.yOffset;
      f.top = this.near * Math.tan(0.5 * this._fovy);
      f.bottom = -f.top;
      f.right = this.aspectRatio * f.top;
      f.left = -f.right;
      f.near = this.near;
      f.far = this.far;
      f.right += this.xOffset;
      f.left += this.xOffset;
      f.top += this.yOffset;
      f.bottom += this.yOffset;
    }
  }

}

new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();

new Matrix3();
new Matrix3();
new Matrix3();
new Matrix3();
new Matrix3();

new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Vector3();
new Matrix3();
({
  diagonal: new Matrix3(),
  unitary: new Matrix3()
});

const scratchVector$2 = new Vector3();
const scratchPosition = new Vector3();
const cullingVolume = new CullingVolume([new Plane(), new Plane(), new Plane(), new Plane(), new Plane(), new Plane()]);
function getFrameState(viewport, frameNumber) {
  const {
    cameraDirection,
    cameraUp,
    height
  } = viewport;
  const {
    metersPerUnit
  } = viewport.distanceScales;
  const viewportCenterCartesian = worldToCartesian(viewport, viewport.center);
  const enuToFixedTransform = Ellipsoid.WGS84.eastNorthUpToFixedFrame(viewportCenterCartesian);
  const cameraPositionCartographic = viewport.unprojectPosition(viewport.cameraPosition);
  const cameraPositionCartesian = Ellipsoid.WGS84.cartographicToCartesian(cameraPositionCartographic, new Vector3());
  const cameraDirectionCartesian = new Vector3(enuToFixedTransform.transformAsVector(new Vector3(cameraDirection).scale(metersPerUnit))).normalize();
  const cameraUpCartesian = new Vector3(enuToFixedTransform.transformAsVector(new Vector3(cameraUp).scale(metersPerUnit))).normalize();
  commonSpacePlanesToWGS84(viewport);
  const ViewportClass = viewport.constructor;
  const {
    longitude,
    latitude,
    width,
    bearing,
    zoom
  } = viewport;
  const topDownViewport = new ViewportClass({
    longitude,
    latitude,
    height,
    width,
    bearing,
    zoom,
    pitch: 0
  });
  return {
    camera: {
      position: cameraPositionCartesian,
      direction: cameraDirectionCartesian,
      up: cameraUpCartesian
    },
    viewport,
    topDownViewport,
    height,
    cullingVolume,
    frameNumber,
    sseDenominator: 1.15
  };
}
function limitSelectedTiles(tiles, frameState, maximumTilesSelected) {
  if (maximumTilesSelected === 0 || tiles.length <= maximumTilesSelected) {
    return [tiles, []];
  }

  const tuples = [];
  const {
    longitude: viewportLongitude,
    latitude: viewportLatitude
  } = frameState.viewport;

  for (const [index, tile] of tiles.entries()) {
    const [longitude, latitude] = tile.header.mbs;
    const deltaLon = Math.abs(viewportLongitude - longitude);
    const deltaLat = Math.abs(viewportLatitude - latitude);
    const distance = Math.sqrt(deltaLat * deltaLat + deltaLon * deltaLon);
    tuples.push([index, distance]);
  }

  const tuplesSorted = tuples.sort((a, b) => a[1] - b[1]);
  const selectedTiles = [];

  for (let i = 0; i < maximumTilesSelected; i++) {
    selectedTiles.push(tiles[tuplesSorted[i][0]]);
  }

  const unselectedTiles = [];

  for (let i = maximumTilesSelected; i < tuplesSorted.length; i++) {
    unselectedTiles.push(tiles[tuplesSorted[i][0]]);
  }

  return [selectedTiles, unselectedTiles];
}

function commonSpacePlanesToWGS84(viewport) {
  const frustumPlanes = viewport.getFrustumPlanes();
  const nearCenterCommon = closestPointOnPlane(frustumPlanes.near, viewport.cameraPosition);
  const nearCenterCartesian = worldToCartesian(viewport, nearCenterCommon);
  const cameraCartesian = worldToCartesian(viewport, viewport.cameraPosition, scratchPosition);
  let i = 0;
  cullingVolume.planes[i++].fromPointNormal(nearCenterCartesian, scratchVector$2.copy(nearCenterCartesian).subtract(cameraCartesian));

  for (const dir in frustumPlanes) {
    if (dir === 'near') {
      continue;
    }

    const plane = frustumPlanes[dir];
    const posCommon = closestPointOnPlane(plane, nearCenterCommon, scratchPosition);
    const cartesianPos = worldToCartesian(viewport, posCommon, scratchPosition);
    cullingVolume.planes[i++].fromPointNormal(cartesianPos, scratchVector$2.copy(nearCenterCartesian).subtract(cartesianPos));
  }
}

function closestPointOnPlane(plane, refPoint, out = new Vector3()) {
  const distanceToRef = plane.normal.dot(refPoint);
  out.copy(plane.normal).scale(plane.distance - distanceToRef).add(refPoint);
  return out;
}

function worldToCartesian(viewport, point, out = new Vector3()) {
  const cartographicPos = viewport.unprojectPosition(point);
  return Ellipsoid.WGS84.cartographicToCartesian(cartographicPos, out);
}

const WGS84_RADIUS_X = 6378137.0;
const WGS84_RADIUS_Y = 6378137.0;
const WGS84_RADIUS_Z = 6356752.3142451793;
const scratchVector$1 = new Vector3();
function getZoomFromBoundingVolume(boundingVolume, cartorgraphicCenter) {
  if (boundingVolume instanceof OrientedBoundingBox) {
    const {
      halfAxes
    } = boundingVolume;
    const obbSize = getObbSize(halfAxes);
    return Math.log2(WGS84_RADIUS_Z / (obbSize + cartorgraphicCenter[2]));
  } else if (boundingVolume instanceof BoundingSphere) {
    const {
      radius
    } = boundingVolume;
    return Math.log2(WGS84_RADIUS_Z / (radius + cartorgraphicCenter[2]));
  } else if (boundingVolume.width && boundingVolume.height) {
    const {
      width,
      height
    } = boundingVolume;
    const zoomX = Math.log2(WGS84_RADIUS_X / width);
    const zoomY = Math.log2(WGS84_RADIUS_Y / height);
    return (zoomX + zoomY) / 2;
  }

  return 1;
}
function getZoomFromFullExtent(fullExtent, cartorgraphicCenter, cartesianCenter) {
  const extentVertex = Ellipsoid.WGS84.cartographicToCartesian([fullExtent.xmax, fullExtent.ymax, fullExtent.zmax], new Vector3());
  const extentSize = Math.sqrt(Math.pow(extentVertex[0] - cartesianCenter[0], 2) + Math.pow(extentVertex[1] - cartesianCenter[1], 2) + Math.pow(extentVertex[2] - cartesianCenter[2], 2));
  return Math.log2(WGS84_RADIUS_Z / (extentSize + cartorgraphicCenter[2]));
}
function getZoomFromExtent(extent, cartorgraphicCenter, cartesianCenter) {
  const [xmin, ymin, xmax, ymax] = extent;
  return getZoomFromFullExtent({
    xmin,
    xmax,
    ymin,
    ymax,
    zmin: 0,
    zmax: 0
  }, cartorgraphicCenter, cartesianCenter);
}

function getObbSize(halfAxes) {
  halfAxes.getColumn(0, scratchVector$1);
  const axeY = halfAxes.getColumn(1);
  const axeZ = halfAxes.getColumn(2);
  const farthestVertex = scratchVector$1.add(axeY).add(axeZ);
  const size = farthestVertex.len();
  return size;
}

const TILE_CONTENT_STATE = {
  UNLOADED: 0,
  LOADING: 1,
  PROCESSING: 2,
  READY: 3,
  EXPIRED: 4,
  FAILED: 5
};
const TILE_REFINEMENT = {
  ADD: 1,
  REPLACE: 2
};
const TILE_TYPE = {
  EMPTY: 'empty',
  SCENEGRAPH: 'scenegraph',
  POINTCLOUD: 'pointcloud',
  MESH: 'mesh'
};
const TILESET_TYPE = {
  I3S: 'I3S',
  TILES3D: 'TILES3D'
};
const LOD_METRIC_TYPE = {
  GEOMETRIC_ERROR: 'geometricError',
  MAX_SCREEN_THRESHOLD: 'maxScreenThreshold'
};
const TILE3D_OPTIMIZATION_HINT = {
  NOT_COMPUTED: -1,
  USE_OPTIMIZATION: 1,
  SKIP_OPTIMIZATION: 0
};

function defined$3(x) {
  return x !== undefined && x !== null;
}

const scratchScale = new Vector3();
const scratchNorthWest = new Vector3();
const scratchSouthEast = new Vector3();
function createBoundingVolume(boundingVolumeHeader, transform, result) {
  assert$7(boundingVolumeHeader, '3D Tile: boundingVolume must be defined');

  if (boundingVolumeHeader.box) {
    return createBox(boundingVolumeHeader.box, transform, result);
  }

  if (boundingVolumeHeader.region) {
    const [west, south, east, north, minHeight, maxHeight] = boundingVolumeHeader.region;
    const northWest = Ellipsoid.WGS84.cartographicToCartesian([degrees(west), degrees(north), minHeight], scratchNorthWest);
    const southEast = Ellipsoid.WGS84.cartographicToCartesian([degrees(east), degrees(south), maxHeight], scratchSouthEast);
    const centerInCartesian = new Vector3().addVectors(northWest, southEast).multiplyScalar(0.5);
    const radius = new Vector3().subVectors(northWest, southEast).len() / 2.0;
    return createSphere([centerInCartesian[0], centerInCartesian[1], centerInCartesian[2], radius], new Matrix4());
  }

  if (boundingVolumeHeader.sphere) {
    return createSphere(boundingVolumeHeader.sphere, transform, result);
  }

  throw new Error('3D Tile: boundingVolume must contain a sphere, region, or box');
}

function createBox(box, transform, result) {
  const center = new Vector3(box[0], box[1], box[2]);
  transform.transform(center, center);
  let origin = [];

  if (box.length === 10) {
    const halfSize = box.slice(3, 6);
    const quaternion = new Quaternion();
    quaternion.fromArray(box, 6);
    const x = new Vector3([1, 0, 0]);
    const y = new Vector3([0, 1, 0]);
    const z = new Vector3([0, 0, 1]);
    x.transformByQuaternion(quaternion);
    x.scale(halfSize[0]);
    y.transformByQuaternion(quaternion);
    y.scale(halfSize[1]);
    z.transformByQuaternion(quaternion);
    z.scale(halfSize[2]);
    origin = [...x.toArray(), ...y.toArray(), ...z.toArray()];
  } else {
    origin = [...box.slice(3, 6), ...box.slice(6, 9), ...box.slice(9, 12)];
  }

  const xAxis = transform.transformAsVector(origin.slice(0, 3));
  const yAxis = transform.transformAsVector(origin.slice(3, 6));
  const zAxis = transform.transformAsVector(origin.slice(6, 9));
  const halfAxes = new Matrix3([xAxis[0], xAxis[1], xAxis[2], yAxis[0], yAxis[1], yAxis[2], zAxis[0], zAxis[1], zAxis[2]]);

  if (defined$3(result)) {
    result.center = center;
    result.halfAxes = halfAxes;
    return result;
  }

  return new OrientedBoundingBox(center, halfAxes);
}

function createSphere(sphere, transform, result) {
  const center = new Vector3(sphere[0], sphere[1], sphere[2]);
  transform.transform(center, center);
  const scale = transform.getScale(scratchScale);
  const uniformScale = Math.max(Math.max(scale[0], scale[1]), scale[2]);
  const radius = sphere[3] * uniformScale;

  if (defined$3(result)) {
    result.center = center;
    result.radius = radius;
    return result;
  }

  return new BoundingSphere(center, radius);
}

new Vector3();
new Vector3();
new Matrix4();
new Vector3();
new Vector3();
new Vector3();
function fog(distanceToCamera, density) {
  const scalar = distanceToCamera * density;
  return 1.0 - Math.exp(-(scalar * scalar));
}
function getDynamicScreenSpaceError(tileset, distanceToCamera) {
  if (tileset.dynamicScreenSpaceError && tileset.dynamicScreenSpaceErrorComputedDensity) {
    const density = tileset.dynamicScreenSpaceErrorComputedDensity;
    const factor = tileset.dynamicScreenSpaceErrorFactor;
    const dynamicError = fog(distanceToCamera, density) * factor;
    return dynamicError;
  }

  return 0;
}
function getTiles3DScreenSpaceError(tile, frameState, useParentLodMetric) {
  const tileset = tile.tileset;
  const parentLodMetricValue = tile.parent && tile.parent.lodMetricValue || tile.lodMetricValue;
  const lodMetricValue = useParentLodMetric ? parentLodMetricValue : tile.lodMetricValue;

  if (lodMetricValue === 0.0) {
    return 0.0;
  }

  const distance = Math.max(tile._distanceToCamera, 1e-7);
  const {
    height,
    sseDenominator
  } = frameState;
  const {
    viewDistanceScale
  } = tileset.options;
  let error = lodMetricValue * height * (viewDistanceScale || 1.0) / (distance * sseDenominator);
  error -= getDynamicScreenSpaceError(tileset, distance);
  return error;
}

const cameraPositionCartesian = new Vector3();
const toEye = new Vector3();
const cameraPositionEnu = new Vector3();
const extraVertexEnu = new Vector3();
const projectedOriginVector = new Vector3();
const enuToCartesianMatrix = new Matrix4();
const cartesianToEnuMatrix = new Matrix4();
function getLodStatus(tile, frameState) {
  if (tile.lodMetricValue === 0 || isNaN(tile.lodMetricValue)) {
    return 'DIG';
  }

  const screenSize = 2 * getProjectedRadius(tile, frameState);

  if (screenSize < 2) {
    return 'OUT';
  }

  if (!tile.header.children || screenSize <= tile.lodMetricValue) {
    return 'DRAW';
  } else if (tile.header.children) {
    return 'DIG';
  }

  return 'OUT';
}
function getProjectedRadius(tile, frameState) {
  const {
    topDownViewport: viewport
  } = frameState;
  const mbsLat = tile.header.mbs[1];
  const mbsLon = tile.header.mbs[0];
  const mbsZ = tile.header.mbs[2];
  const mbsR = tile.header.mbs[3];
  const mbsCenterCartesian = [...tile.boundingVolume.center];
  const cameraPositionCartographic = viewport.unprojectPosition(viewport.cameraPosition);
  Ellipsoid.WGS84.cartographicToCartesian(cameraPositionCartographic, cameraPositionCartesian);
  toEye.copy(cameraPositionCartesian).subtract(mbsCenterCartesian).normalize();
  Ellipsoid.WGS84.eastNorthUpToFixedFrame(mbsCenterCartesian, enuToCartesianMatrix);
  cartesianToEnuMatrix.copy(enuToCartesianMatrix).invert();
  cameraPositionEnu.copy(cameraPositionCartesian).transform(cartesianToEnuMatrix);
  const projection = Math.sqrt(cameraPositionEnu[0] * cameraPositionEnu[0] + cameraPositionEnu[1] * cameraPositionEnu[1]);
  const extraZ = projection * projection / cameraPositionEnu[2];
  extraVertexEnu.copy([cameraPositionEnu[0], cameraPositionEnu[1], extraZ]);
  const extraVertexCartesian = extraVertexEnu.transform(enuToCartesianMatrix);
  const extraVectorCartesian = extraVertexCartesian.subtract(mbsCenterCartesian).normalize();
  const radiusVector = toEye.cross(extraVectorCartesian).normalize().scale(mbsR);
  const sphereMbsBorderVertexCartesian = radiusVector.add(mbsCenterCartesian);
  const sphereMbsBorderVertexCartographic = Ellipsoid.WGS84.cartesianToCartographic(sphereMbsBorderVertexCartesian);
  const projectedOrigin = viewport.project([mbsLon, mbsLat, mbsZ]);
  const projectedMbsBorderVertex = viewport.project(sphereMbsBorderVertexCartographic);
  const projectedRadius = projectedOriginVector.copy(projectedOrigin).subtract(projectedMbsBorderVertex).magnitude();
  return projectedRadius;
}

function get3dTilesOptions(tileset) {
  return {
    assetGltfUpAxis: tileset.asset && tileset.asset.gltfUpAxis || 'Y'
  };
}

class ManagedArray {
  constructor(length = 0) {
    _defineProperty(this, "_map", new Map());

    _defineProperty(this, "_array", void 0);

    _defineProperty(this, "_length", void 0);

    this._array = new Array(length);
    this._length = length;
  }

  get length() {
    return this._length;
  }

  set length(length) {
    this._length = length;

    if (length > this._array.length) {
      this._array.length = length;
    }
  }

  get values() {
    return this._array;
  }

  get(index) {
    assert$7(index < this._array.length);
    return this._array[index];
  }

  set(index, element) {
    assert$7(index >= 0);

    if (index >= this.length) {
      this.length = index + 1;
    }

    if (this._map.has(this._array[index])) {
      this._map.delete(this._array[index]);
    }

    this._array[index] = element;

    this._map.set(element, index);
  }

  delete(element) {
    const index = this._map.get(element);

    if (index >= 0) {
      this._array.splice(index, 1);

      this._map.delete(element);

      this.length--;
    }
  }

  peek() {
    return this._array[this._length - 1];
  }

  push(element) {
    if (!this._map.has(element)) {
      const index = this.length++;
      this._array[index] = element;

      this._map.set(element, index);
    }
  }

  pop() {
    const element = this._array[--this.length];

    this._map.delete(element);

    return element;
  }

  reserve(length) {
    assert$7(length >= 0);

    if (length > this._array.length) {
      this._array.length = length;
    }
  }

  resize(length) {
    assert$7(length >= 0);
    this.length = length;
  }

  trim(length) {
    if (length === null || length === undefined) {
      length = this.length;
    }

    this._array.length = length;
  }

  reset() {
    this._array = [];
    this._map = new Map();
    this._length = 0;
  }

  find(target) {
    return this._map.has(target);
  }

}

const DEFAULT_PROPS$1 = {
  loadSiblings: false,
  skipLevelOfDetail: false,
  maximumScreenSpaceError: 2,
  updateTransforms: true,
  onTraversalEnd: () => {},
  viewportTraversersMap: {},
  basePath: ''
};
class TilesetTraverser {
  traversalFinished(frameState) {
    return true;
  }

  constructor(options) {
    _defineProperty(this, "options", void 0);

    _defineProperty(this, "root", void 0);

    _defineProperty(this, "requestedTiles", void 0);

    _defineProperty(this, "selectedTiles", void 0);

    _defineProperty(this, "emptyTiles", void 0);

    _defineProperty(this, "lastUpdate", new Date().getTime());

    _defineProperty(this, "updateDebounceTime", 1000);

    _defineProperty(this, "_traversalStack", void 0);

    _defineProperty(this, "_emptyTraversalStack", void 0);

    _defineProperty(this, "_frameNumber", void 0);

    this.options = { ...DEFAULT_PROPS$1,
      ...options
    };
    this._traversalStack = new ManagedArray();
    this._emptyTraversalStack = new ManagedArray();
    this._frameNumber = null;
    this.root = null;
    this.selectedTiles = {};
    this.requestedTiles = {};
    this.emptyTiles = {};
  }

  traverse(root, frameState, options) {
    this.root = root;
    this.options = { ...this.options,
      ...options
    };
    this.reset();
    this.updateTile(root, frameState);
    this._frameNumber = frameState.frameNumber;
    this.executeTraversal(root, frameState);
  }

  reset() {
    this.requestedTiles = {};
    this.selectedTiles = {};
    this.emptyTiles = {};

    this._traversalStack.reset();

    this._emptyTraversalStack.reset();
  }

  executeTraversal(root, frameState) {
    const stack = this._traversalStack;
    root._selectionDepth = 1;
    stack.push(root);

    while (stack.length > 0) {
      const tile = stack.pop();
      let shouldRefine = false;

      if (this.canTraverse(tile, frameState)) {
        this.updateChildTiles(tile, frameState);
        shouldRefine = this.updateAndPushChildren(tile, frameState, stack, tile.hasRenderContent ? tile._selectionDepth + 1 : tile._selectionDepth);
      }

      const parent = tile.parent;
      const parentRefines = Boolean(!parent || parent._shouldRefine);
      const stoppedRefining = !shouldRefine;

      if (!tile.hasRenderContent) {
        this.emptyTiles[tile.id] = tile;
        this.loadTile(tile, frameState);

        if (stoppedRefining) {
          this.selectTile(tile, frameState);
        }
      } else if (tile.refine === TILE_REFINEMENT.ADD) {
        this.loadTile(tile, frameState);
        this.selectTile(tile, frameState);
      } else if (tile.refine === TILE_REFINEMENT.REPLACE) {
        this.loadTile(tile, frameState);

        if (stoppedRefining) {
          this.selectTile(tile, frameState);
        }
      }

      this.touchTile(tile, frameState);
      tile._shouldRefine = shouldRefine && parentRefines;
    }

    const newTime = new Date().getTime();

    if (this.traversalFinished(frameState) || newTime - this.lastUpdate > this.updateDebounceTime) {
      this.lastUpdate = newTime;
      this.options.onTraversalEnd(frameState);
    }
  }

  updateChildTiles(tile, frameState) {
    const children = tile.children;

    for (const child of children) {
      this.updateTile(child, frameState);
    }

    return true;
  }

  updateAndPushChildren(tile, frameState, stack, depth) {
    const {
      loadSiblings,
      skipLevelOfDetail
    } = this.options;
    const children = tile.children;
    children.sort(this.compareDistanceToCamera.bind(this));
    const checkRefines = tile.refine === TILE_REFINEMENT.REPLACE && tile.hasRenderContent && !skipLevelOfDetail;
    let hasVisibleChild = false;
    let refines = true;

    for (const child of children) {
      child._selectionDepth = depth;

      if (child.isVisibleAndInRequestVolume) {
        if (stack.find(child)) {
          stack.delete(child);
        }

        stack.push(child);
        hasVisibleChild = true;
      } else if (checkRefines || loadSiblings) {
        this.loadTile(child, frameState);
        this.touchTile(child, frameState);
      }

      if (checkRefines) {
        let childRefines;

        if (!child._inRequestVolume) {
          childRefines = false;
        } else if (!child.hasRenderContent) {
          childRefines = this.executeEmptyTraversal(child, frameState);
        } else {
          childRefines = child.contentAvailable;
        }

        refines = refines && childRefines;

        if (!refines) {
          return false;
        }
      }
    }

    if (!hasVisibleChild) {
      refines = false;
    }

    return refines;
  }

  updateTile(tile, frameState) {
    this.updateTileVisibility(tile, frameState);
  }

  selectTile(tile, frameState) {
    if (this.shouldSelectTile(tile)) {
      tile._selectedFrame = frameState.frameNumber;
      this.selectedTiles[tile.id] = tile;
    }
  }

  loadTile(tile, frameState) {
    if (this.shouldLoadTile(tile)) {
      tile._requestedFrame = frameState.frameNumber;
      tile._priority = tile._getPriority();
      this.requestedTiles[tile.id] = tile;
    }
  }

  touchTile(tile, frameState) {
    tile.tileset._cache.touch(tile);

    tile._touchedFrame = frameState.frameNumber;
  }

  canTraverse(tile, frameState, useParentMetric = false, ignoreVisibility = false) {
    if (!tile.hasChildren) {
      return false;
    }

    if (tile.hasTilesetContent) {
      return !tile.contentExpired;
    }

    if (!ignoreVisibility && !tile.isVisibleAndInRequestVolume) {
      return false;
    }

    return this.shouldRefine(tile, frameState, useParentMetric);
  }

  shouldLoadTile(tile) {
    return tile.hasUnloadedContent || tile.contentExpired;
  }

  shouldSelectTile(tile) {
    return tile.contentAvailable && !this.options.skipLevelOfDetail;
  }

  shouldRefine(tile, frameState, useParentMetric) {
    let screenSpaceError = tile._screenSpaceError;

    if (useParentMetric) {
      screenSpaceError = tile.getScreenSpaceError(frameState, true);
    }

    return screenSpaceError > this.options.maximumScreenSpaceError;
  }

  updateTileVisibility(tile, frameState) {
    const viewportIds = [];

    if (this.options.viewportTraversersMap) {
      for (const key in this.options.viewportTraversersMap) {
        const value = this.options.viewportTraversersMap[key];

        if (value === frameState.viewport.id) {
          viewportIds.push(key);
        }
      }
    } else {
      viewportIds.push(frameState.viewport.id);
    }

    tile.updateVisibility(frameState, viewportIds);
  }

  compareDistanceToCamera(b, a) {
    return b._distanceToCamera - a._distanceToCamera;
  }

  anyChildrenVisible(tile, frameState) {
    let anyVisible = false;

    for (const child of tile.children) {
      child.updateVisibility(frameState);
      anyVisible = anyVisible || child.isVisibleAndInRequestVolume;
    }

    return anyVisible;
  }

  executeEmptyTraversal(root, frameState) {
    let allDescendantsLoaded = true;
    const stack = this._emptyTraversalStack;
    stack.push(root);

    while (stack.length > 0 && allDescendantsLoaded) {
      const tile = stack.pop();
      this.updateTile(tile, frameState);

      if (!tile.isVisibleAndInRequestVolume) {
        this.loadTile(tile, frameState);
      }

      this.touchTile(tile, frameState);
      const traverse = !tile.hasRenderContent && this.canTraverse(tile, frameState, false, true);

      if (traverse) {
        const children = tile.children;

        for (const child of children) {
          if (stack.find(child)) {
            stack.delete(child);
          }

          stack.push(child);
        }
      } else if (!tile.contentAvailable) {
        allDescendantsLoaded = false;
      }
    }

    return allDescendantsLoaded;
  }

}

const scratchVector = new Vector3();

function defined$2(x) {
  return x !== undefined && x !== null;
}

class TileHeader {
  constructor(tileset, header, parentHeader, extendedId = '') {
    _defineProperty(this, "tileset", void 0);

    _defineProperty(this, "header", void 0);

    _defineProperty(this, "id", void 0);

    _defineProperty(this, "url", void 0);

    _defineProperty(this, "parent", void 0);

    _defineProperty(this, "refine", void 0);

    _defineProperty(this, "type", void 0);

    _defineProperty(this, "contentUrl", void 0);

    _defineProperty(this, "lodMetricType", void 0);

    _defineProperty(this, "lodMetricValue", void 0);

    _defineProperty(this, "boundingVolume", void 0);

    _defineProperty(this, "content", void 0);

    _defineProperty(this, "contentState", void 0);

    _defineProperty(this, "gpuMemoryUsageInBytes", void 0);

    _defineProperty(this, "children", void 0);

    _defineProperty(this, "depth", void 0);

    _defineProperty(this, "viewportIds", void 0);

    _defineProperty(this, "transform", void 0);

    _defineProperty(this, "extensions", void 0);

    _defineProperty(this, "userData", void 0);

    _defineProperty(this, "computedTransform", void 0);

    _defineProperty(this, "hasEmptyContent", void 0);

    _defineProperty(this, "hasTilesetContent", void 0);

    _defineProperty(this, "traverser", void 0);

    _defineProperty(this, "_cacheNode", void 0);

    _defineProperty(this, "_frameNumber", void 0);

    _defineProperty(this, "_lodJudge", void 0);

    _defineProperty(this, "_expireDate", void 0);

    _defineProperty(this, "_expiredContent", void 0);

    _defineProperty(this, "_shouldRefine", void 0);

    _defineProperty(this, "_distanceToCamera", void 0);

    _defineProperty(this, "_centerZDepth", void 0);

    _defineProperty(this, "_screenSpaceError", void 0);

    _defineProperty(this, "_visibilityPlaneMask", void 0);

    _defineProperty(this, "_visible", void 0);

    _defineProperty(this, "_inRequestVolume", void 0);

    _defineProperty(this, "_stackLength", void 0);

    _defineProperty(this, "_selectionDepth", void 0);

    _defineProperty(this, "_touchedFrame", void 0);

    _defineProperty(this, "_visitedFrame", void 0);

    _defineProperty(this, "_selectedFrame", void 0);

    _defineProperty(this, "_requestedFrame", void 0);

    _defineProperty(this, "_priority", void 0);

    _defineProperty(this, "_contentBoundingVolume", void 0);

    _defineProperty(this, "_viewerRequestVolume", void 0);

    _defineProperty(this, "_initialTransform", void 0);

    this.header = header;
    this.tileset = tileset;
    this.id = extendedId || header.id;
    this.url = header.url;
    this.parent = parentHeader;
    this.refine = this._getRefine(header.refine);
    this.type = header.type;
    this.contentUrl = header.contentUrl;
    this.lodMetricType = 'geometricError';
    this.lodMetricValue = 0;
    this.boundingVolume = null;
    this.content = null;
    this.contentState = TILE_CONTENT_STATE.UNLOADED;
    this.gpuMemoryUsageInBytes = 0;
    this.children = [];
    this.hasEmptyContent = false;
    this.hasTilesetContent = false;
    this.depth = 0;
    this.viewportIds = [];
    this.userData = {};
    this.extensions = null;
    this._priority = 0;
    this._touchedFrame = 0;
    this._visitedFrame = 0;
    this._selectedFrame = 0;
    this._requestedFrame = 0;
    this._screenSpaceError = 0;
    this._cacheNode = null;
    this._frameNumber = null;
    this._cacheNode = null;
    this.traverser = new TilesetTraverser({});
    this._shouldRefine = false;
    this._distanceToCamera = 0;
    this._centerZDepth = 0;
    this._visible = undefined;
    this._inRequestVolume = false;
    this._stackLength = 0;
    this._selectionDepth = 0;
    this._initialTransform = new Matrix4();
    this.transform = new Matrix4();

    this._initializeLodMetric(header);

    this._initializeTransforms(header);

    this._initializeBoundingVolumes(header);

    this._initializeContent(header);

    this._initializeRenderingState(header);

    this._lodJudge = null;
    this._expireDate = null;
    this._expiredContent = null;
    Object.seal(this);
  }

  destroy() {
    this.header = null;
  }

  isDestroyed() {
    return this.header === null;
  }

  get selected() {
    return this._selectedFrame === this.tileset._frameNumber;
  }

  get isVisible() {
    return this._visible;
  }

  get isVisibleAndInRequestVolume() {
    return this._visible && this._inRequestVolume;
  }

  get hasRenderContent() {
    return !this.hasEmptyContent && !this.hasTilesetContent;
  }

  get hasChildren() {
    return this.children.length > 0 || this.header.children && this.header.children.length > 0;
  }

  get contentReady() {
    return this.contentState === TILE_CONTENT_STATE.READY || this.hasEmptyContent;
  }

  get contentAvailable() {
    return Boolean(this.contentReady && this.hasRenderContent || this._expiredContent && !this.contentFailed);
  }

  get hasUnloadedContent() {
    return this.hasRenderContent && this.contentUnloaded;
  }

  get contentUnloaded() {
    return this.contentState === TILE_CONTENT_STATE.UNLOADED;
  }

  get contentExpired() {
    return this.contentState === TILE_CONTENT_STATE.EXPIRED;
  }

  get contentFailed() {
    return this.contentState === TILE_CONTENT_STATE.FAILED;
  }

  getScreenSpaceError(frameState, useParentLodMetric) {
    switch (this.tileset.type) {
      case TILESET_TYPE.I3S:
        return getProjectedRadius(this, frameState);

      case TILESET_TYPE.TILES3D:
        return getTiles3DScreenSpaceError(this, frameState, useParentLodMetric);

      default:
        throw new Error('Unsupported tileset type');
    }
  }

  unselect() {
    this._selectedFrame = 0;
  }

  _getPriority() {
    const traverser = this.tileset._traverser;
    const {
      skipLevelOfDetail
    } = traverser.options;
    const maySkipTile = this.refine === TILE_REFINEMENT.ADD || skipLevelOfDetail;

    if (maySkipTile && !this.isVisible && this._visible !== undefined) {
      return -1;
    }

    if (this.tileset._frameNumber - this._touchedFrame >= 1) {
      return -1;
    }

    if (this.contentState === TILE_CONTENT_STATE.UNLOADED) {
      return -1;
    }

    const parent = this.parent;
    const useParentScreenSpaceError = parent && (!maySkipTile || this._screenSpaceError === 0.0 || parent.hasTilesetContent);
    const screenSpaceError = useParentScreenSpaceError ? parent._screenSpaceError : this._screenSpaceError;
    const rootScreenSpaceError = traverser.root ? traverser.root._screenSpaceError : 0.0;
    return Math.max(rootScreenSpaceError - screenSpaceError, 0);
  }

  async loadContent() {
    if (this.hasEmptyContent) {
      return false;
    }

    if (this.content) {
      return true;
    }

    const expired = this.contentExpired;

    if (expired) {
      this._expireDate = null;
    }

    this.contentState = TILE_CONTENT_STATE.LOADING;
    const requestToken = await this.tileset._requestScheduler.scheduleRequest(this.id, this._getPriority.bind(this));

    if (!requestToken) {
      this.contentState = TILE_CONTENT_STATE.UNLOADED;
      return false;
    }

    try {
      const contentUrl = this.tileset.getTileUrl(this.contentUrl);
      const loader = this.tileset.loader;
      const options = { ...this.tileset.loadOptions,
        [loader.id]: { ...this.tileset.loadOptions[loader.id],
          isTileset: this.type === 'json',
          ...this._getLoaderSpecificOptions(loader.id)
        }
      };
      this.content = await load(contentUrl, loader, options);

      if (this.tileset.options.contentLoader) {
        await this.tileset.options.contentLoader(this);
      }

      if (this._isTileset()) {
        this.tileset._initializeTileHeaders(this.content, this);
      }

      this.contentState = TILE_CONTENT_STATE.READY;

      this._onContentLoaded();

      return true;
    } catch (error) {
      this.contentState = TILE_CONTENT_STATE.FAILED;
      throw error;
    } finally {
      requestToken.done();
    }
  }

  unloadContent() {
    if (this.content && this.content.destroy) {
      this.content.destroy();
    }

    this.content = null;

    if (this.header.content && this.header.content.destroy) {
      this.header.content.destroy();
    }

    this.header.content = null;
    this.contentState = TILE_CONTENT_STATE.UNLOADED;
    return true;
  }

  updateVisibility(frameState, viewportIds) {
    if (this._frameNumber === frameState.frameNumber) {
      return;
    }

    const parent = this.parent;
    const parentVisibilityPlaneMask = parent ? parent._visibilityPlaneMask : CullingVolume.MASK_INDETERMINATE;

    if (this.tileset._traverser.options.updateTransforms) {
      const parentTransform = parent ? parent.computedTransform : this.tileset.modelMatrix;

      this._updateTransform(parentTransform);
    }

    this._distanceToCamera = this.distanceToTile(frameState);
    this._screenSpaceError = this.getScreenSpaceError(frameState, false);
    this._visibilityPlaneMask = this.visibility(frameState, parentVisibilityPlaneMask);
    this._visible = this._visibilityPlaneMask !== CullingVolume.MASK_OUTSIDE;
    this._inRequestVolume = this.insideViewerRequestVolume(frameState);
    this._frameNumber = frameState.frameNumber;
    this.viewportIds = viewportIds;
  }

  visibility(frameState, parentVisibilityPlaneMask) {
    const {
      cullingVolume
    } = frameState;
    const {
      boundingVolume
    } = this;
    return cullingVolume.computeVisibilityWithPlaneMask(boundingVolume, parentVisibilityPlaneMask);
  }

  contentVisibility() {
    return true;
  }

  distanceToTile(frameState) {
    const boundingVolume = this.boundingVolume;
    return Math.sqrt(Math.max(boundingVolume.distanceSquaredTo(frameState.camera.position), 0));
  }

  cameraSpaceZDepth({
    camera
  }) {
    const boundingVolume = this.boundingVolume;
    scratchVector.subVectors(boundingVolume.center, camera.position);
    return camera.direction.dot(scratchVector);
  }

  insideViewerRequestVolume(frameState) {
    const viewerRequestVolume = this._viewerRequestVolume;
    return !viewerRequestVolume || viewerRequestVolume.distanceSquaredTo(frameState.camera.position) <= 0;
  }

  updateExpiration() {
    if (defined$2(this._expireDate) && this.contentReady && !this.hasEmptyContent) {
      const now = Date.now();

      if (Date.lessThan(this._expireDate, now)) {
        this.contentState = TILE_CONTENT_STATE.EXPIRED;
        this._expiredContent = this.content;
      }
    }
  }

  get extras() {
    return this.header.extras;
  }

  _initializeLodMetric(header) {
    if ('lodMetricType' in header) {
      this.lodMetricType = header.lodMetricType;
    } else {
      this.lodMetricType = this.parent && this.parent.lodMetricType || this.tileset.lodMetricType;
      console.warn("3D Tile: Required prop lodMetricType is undefined. Using parent lodMetricType");
    }

    if ('lodMetricValue' in header) {
      this.lodMetricValue = header.lodMetricValue;
    } else {
      this.lodMetricValue = this.parent && this.parent.lodMetricValue || this.tileset.lodMetricValue;
      console.warn('3D Tile: Required prop lodMetricValue is undefined. Using parent lodMetricValue');
    }
  }

  _initializeTransforms(tileHeader) {
    this.transform = tileHeader.transform ? new Matrix4(tileHeader.transform) : new Matrix4();
    const parent = this.parent;
    const tileset = this.tileset;
    const parentTransform = parent && parent.computedTransform ? parent.computedTransform.clone() : tileset.modelMatrix.clone();
    this.computedTransform = new Matrix4(parentTransform).multiplyRight(this.transform);
    const parentInitialTransform = parent && parent._initialTransform ? parent._initialTransform.clone() : new Matrix4();
    this._initialTransform = new Matrix4(parentInitialTransform).multiplyRight(this.transform);
  }

  _initializeBoundingVolumes(tileHeader) {
    this._contentBoundingVolume = null;
    this._viewerRequestVolume = null;

    this._updateBoundingVolume(tileHeader);
  }

  _initializeContent(tileHeader) {
    this.content = {
      _tileset: this.tileset,
      _tile: this
    };
    this.hasEmptyContent = true;
    this.contentState = TILE_CONTENT_STATE.UNLOADED;
    this.hasTilesetContent = false;

    if (tileHeader.contentUrl) {
      this.content = null;
      this.hasEmptyContent = false;
    }
  }

  _initializeRenderingState(header) {
    this.depth = header.level || (this.parent ? this.parent.depth + 1 : 0);
    this._shouldRefine = false;
    this._distanceToCamera = 0;
    this._centerZDepth = 0;
    this._screenSpaceError = 0;
    this._visibilityPlaneMask = CullingVolume.MASK_INDETERMINATE;
    this._visible = undefined;
    this._inRequestVolume = false;
    this._stackLength = 0;
    this._selectionDepth = 0;
    this._frameNumber = 0;
    this._touchedFrame = 0;
    this._visitedFrame = 0;
    this._selectedFrame = 0;
    this._requestedFrame = 0;
    this._priority = 0.0;
  }

  _getRefine(refine) {
    return refine || this.parent && this.parent.refine || TILE_REFINEMENT.REPLACE;
  }

  _isTileset() {
    return this.contentUrl.indexOf('.json') !== -1;
  }

  _onContentLoaded() {
    switch (this.content && this.content.type) {
      case 'vctr':
      case 'geom':
        this.tileset._traverser.disableSkipLevelOfDetail = true;
        break;
    }

    if (this._isTileset()) {
      this.hasTilesetContent = true;
    }
  }

  _updateBoundingVolume(header) {
    this.boundingVolume = createBoundingVolume(header.boundingVolume, this.computedTransform, this.boundingVolume);
    const content = header.content;

    if (!content) {
      return;
    }

    if (content.boundingVolume) {
      this._contentBoundingVolume = createBoundingVolume(content.boundingVolume, this.computedTransform, this._contentBoundingVolume);
    }

    if (header.viewerRequestVolume) {
      this._viewerRequestVolume = createBoundingVolume(header.viewerRequestVolume, this.computedTransform, this._viewerRequestVolume);
    }
  }

  _updateTransform(parentTransform = new Matrix4()) {
    const computedTransform = parentTransform.clone().multiplyRight(this.transform);
    const didTransformChange = !computedTransform.equals(this.computedTransform);

    if (!didTransformChange) {
      return;
    }

    this.computedTransform = computedTransform;

    this._updateBoundingVolume(this.header);
  }

  _getLoaderSpecificOptions(loaderId) {
    switch (loaderId) {
      case 'i3s':
        return { ...this.tileset.options.i3s,
          tile: this.header,
          tileset: this.tileset.tileset,
          isTileHeader: false
        };

      case '3d-tiles':
      case 'cesium-ion':
      default:
        return get3dTilesOptions(this.tileset.tileset);
    }
  }

}

class Tileset3DTraverser extends TilesetTraverser {
  compareDistanceToCamera(a, b) {
    return b._distanceToCamera === 0 && a._distanceToCamera === 0 ? b._centerZDepth - a._centerZDepth : b._distanceToCamera - a._distanceToCamera;
  }

  updateTileVisibility(tile, frameState) {
    super.updateTileVisibility(tile, frameState);

    if (!tile.isVisibleAndInRequestVolume) {
      return;
    }

    const hasChildren = tile.children.length > 0;

    if (tile.hasTilesetContent && hasChildren) {
      const firstChild = tile.children[0];
      this.updateTileVisibility(firstChild, frameState);
      tile._visible = firstChild._visible;
      return;
    }

    if (this.meetsScreenSpaceErrorEarly(tile, frameState)) {
      tile._visible = false;
      return;
    }

    const replace = tile.refine === TILE_REFINEMENT.REPLACE;
    const useOptimization = tile._optimChildrenWithinParent === TILE3D_OPTIMIZATION_HINT.USE_OPTIMIZATION;

    if (replace && useOptimization && hasChildren) {
      if (!this.anyChildrenVisible(tile, frameState)) {
        tile._visible = false;
        return;
      }
    }
  }

  meetsScreenSpaceErrorEarly(tile, frameState) {
    const {
      parent
    } = tile;

    if (!parent || parent.hasTilesetContent || parent.refine !== TILE_REFINEMENT.ADD) {
      return false;
    }

    return !this.shouldRefine(tile, frameState, true);
  }

}

class I3SPendingTilesRegister {
  constructor() {
    _defineProperty(this, "frameNumberMap", new Map());
  }

  register(viewportId, frameNumber) {
    const viewportMap = this.frameNumberMap.get(viewportId) || new Map();
    const oldCount = viewportMap.get(frameNumber) || 0;
    viewportMap.set(frameNumber, oldCount + 1);
    this.frameNumberMap.set(viewportId, viewportMap);
  }

  deregister(viewportId, frameNumber) {
    const viewportMap = this.frameNumberMap.get(viewportId);

    if (!viewportMap) {
      return;
    }

    const oldCount = viewportMap.get(frameNumber) || 1;
    viewportMap.set(frameNumber, oldCount - 1);
  }

  isZero(viewportId, frameNumber) {
    var _this$frameNumberMap$;

    const count = ((_this$frameNumberMap$ = this.frameNumberMap.get(viewportId)) === null || _this$frameNumberMap$ === void 0 ? void 0 : _this$frameNumberMap$.get(frameNumber)) || 0;
    return count === 0;
  }

}

const STATUS = {
  REQUESTED: 'REQUESTED',
  COMPLETED: 'COMPLETED',
  ERROR: 'ERROR'
};
class I3STileManager {
  constructor() {
    _defineProperty(this, "_statusMap", void 0);

    _defineProperty(this, "pendingTilesRegister", new I3SPendingTilesRegister());

    this._statusMap = {};
  }

  add(request, key, callback, frameState) {
    if (!this._statusMap[key]) {
      const {
        frameNumber,
        viewport: {
          id
        }
      } = frameState;
      this._statusMap[key] = {
        request,
        callback,
        key,
        frameState,
        status: STATUS.REQUESTED
      };
      this.pendingTilesRegister.register(id, frameNumber);
      request().then(data => {
        this._statusMap[key].status = STATUS.COMPLETED;
        const {
          frameNumber: actualFrameNumber,
          viewport: {
            id
          }
        } = this._statusMap[key].frameState;
        this.pendingTilesRegister.deregister(id, actualFrameNumber);

        this._statusMap[key].callback(data, frameState);
      }).catch(error => {
        this._statusMap[key].status = STATUS.ERROR;
        const {
          frameNumber: actualFrameNumber,
          viewport: {
            id
          }
        } = this._statusMap[key].frameState;
        this.pendingTilesRegister.deregister(id, actualFrameNumber);
        callback(error);
      });
    }
  }

  update(key, frameState) {
    if (this._statusMap[key]) {
      const {
        frameNumber,
        viewport: {
          id
        }
      } = this._statusMap[key].frameState;
      this.pendingTilesRegister.deregister(id, frameNumber);
      const {
        frameNumber: newFrameNumber,
        viewport: {
          id: newViewportId
        }
      } = frameState;
      this.pendingTilesRegister.register(newViewportId, newFrameNumber);
      this._statusMap[key].frameState = frameState;
    }
  }

  find(key) {
    return this._statusMap[key];
  }

  hasPendingTiles(viewportId, frameNumber) {
    return !this.pendingTilesRegister.isZero(viewportId, frameNumber);
  }

}

class I3STilesetTraverser extends TilesetTraverser {
  traversalFinished(frameState) {
    return !this._tileManager.hasPendingTiles(frameState.viewport.id, this._frameNumber || 0);
  }

  constructor(options) {
    super(options);

    _defineProperty(this, "_tileManager", void 0);

    this._tileManager = new I3STileManager();
  }

  shouldRefine(tile, frameState) {
    tile._lodJudge = getLodStatus(tile, frameState);
    return tile._lodJudge === 'DIG';
  }

  updateChildTiles(tile, frameState) {
    const children = tile.header.children || [];
    const childTiles = tile.children;
    const tileset = tile.tileset;

    for (const child of children) {
      const extendedId = "".concat(child.id, "-").concat(frameState.viewport.id);
      const childTile = childTiles && childTiles.find(t => t.id === extendedId);

      if (!childTile) {
        let request = () => this._loadTile(child.id, tileset);

        const cachedRequest = this._tileManager.find(extendedId);

        if (!cachedRequest) {
          if (tileset.tileset.nodePages) {
            request = () => tileset.tileset.nodePagesTile.formTileFromNodePages(child.id);
          }

          this._tileManager.add(request, extendedId, header => this._onTileLoad(header, tile, extendedId), frameState);
        } else {
          this._tileManager.update(extendedId, frameState);
        }
      } else if (childTile) {
        this.updateTile(childTile, frameState);
      }
    }

    return false;
  }

  async _loadTile(nodeId, tileset) {
    const {
      loader
    } = tileset;
    const nodeUrl = tileset.getTileUrl("".concat(tileset.url, "/nodes/").concat(nodeId));
    const options = { ...tileset.loadOptions,
      i3s: { ...tileset.loadOptions.i3s,
        isTileHeader: true,
        loadContent: false
      }
    };
    return await load(nodeUrl, loader, options);
  }

  _onTileLoad(header, tile, extendedId) {
    const childTile = new TileHeader(tile.tileset, header, tile, extendedId);
    tile.children.push(childTile);

    const frameState = this._tileManager.find(childTile.id).frameState;

    this.updateTile(childTile, frameState);

    if (this._frameNumber === frameState.frameNumber && (this.traversalFinished(frameState) || new Date().getTime() - this.lastUpdate > this.updateDebounceTime)) {
      this.executeTraversal(childTile, frameState);
    }
  }

}

const DEFAULT_PROPS = {
  description: '',
  ellipsoid: Ellipsoid.WGS84,
  modelMatrix: new Matrix4(),
  throttleRequests: true,
  maxRequests: 64,
  maximumMemoryUsage: 32,
  maximumTilesSelected: 0,
  debounceTime: 0,
  onTileLoad: () => {},
  onTileUnload: () => {},
  onTileError: () => {},
  onTraversalComplete: selectedTiles => selectedTiles,
  contentLoader: undefined,
  viewDistanceScale: 1.0,
  maximumScreenSpaceError: 8,
  loadTiles: true,
  updateTransforms: true,
  viewportTraversersMap: null,
  loadOptions: {
    fetch: {}
  },
  attributions: [],
  basePath: '',
  i3s: {}
};
const TILES_TOTAL = 'Tiles In Tileset(s)';
const TILES_IN_MEMORY = 'Tiles In Memory';
const TILES_IN_VIEW = 'Tiles In View';
const TILES_RENDERABLE = 'Tiles To Render';
const TILES_LOADED = 'Tiles Loaded';
const TILES_LOADING = 'Tiles Loading';
const TILES_UNLOADED = 'Tiles Unloaded';
const TILES_LOAD_FAILED = 'Failed Tile Loads';
const POINTS_COUNT = 'Points/Vertices';
const TILES_GPU_MEMORY = 'Tile Memory Use';
class Tileset3D {
  constructor(json, options) {
    _defineProperty(this, "options", void 0);

    _defineProperty(this, "loadOptions", void 0);

    _defineProperty(this, "type", void 0);

    _defineProperty(this, "tileset", void 0);

    _defineProperty(this, "loader", void 0);

    _defineProperty(this, "url", void 0);

    _defineProperty(this, "basePath", void 0);

    _defineProperty(this, "modelMatrix", void 0);

    _defineProperty(this, "ellipsoid", void 0);

    _defineProperty(this, "lodMetricType", void 0);

    _defineProperty(this, "lodMetricValue", void 0);

    _defineProperty(this, "refine", void 0);

    _defineProperty(this, "root", void 0);

    _defineProperty(this, "roots", void 0);

    _defineProperty(this, "asset", void 0);

    _defineProperty(this, "description", void 0);

    _defineProperty(this, "properties", void 0);

    _defineProperty(this, "extras", void 0);

    _defineProperty(this, "attributions", void 0);

    _defineProperty(this, "credits", void 0);

    _defineProperty(this, "stats", void 0);

    _defineProperty(this, "traverseCounter", void 0);

    _defineProperty(this, "geometricError", void 0);

    _defineProperty(this, "selectedTiles", void 0);

    _defineProperty(this, "updatePromise", null);

    _defineProperty(this, "tilesetInitializationPromise", void 0);

    _defineProperty(this, "cartographicCenter", void 0);

    _defineProperty(this, "cartesianCenter", void 0);

    _defineProperty(this, "zoom", void 0);

    _defineProperty(this, "boundingVolume", void 0);

    _defineProperty(this, "gpuMemoryUsageInBytes", void 0);

    _defineProperty(this, "dynamicScreenSpaceErrorComputedDensity", void 0);

    _defineProperty(this, "_traverser", void 0);

    _defineProperty(this, "_cache", void 0);

    _defineProperty(this, "_requestScheduler", void 0);

    _defineProperty(this, "_frameNumber", void 0);

    _defineProperty(this, "_queryParamsString", void 0);

    _defineProperty(this, "_queryParams", void 0);

    _defineProperty(this, "_extensionsUsed", void 0);

    _defineProperty(this, "_tiles", void 0);

    _defineProperty(this, "_pendingCount", void 0);

    _defineProperty(this, "lastUpdatedVieports", void 0);

    _defineProperty(this, "_requestedTiles", void 0);

    _defineProperty(this, "_emptyTiles", void 0);

    _defineProperty(this, "frameStateData", void 0);

    _defineProperty(this, "maximumMemoryUsage", void 0);

    assert$7(json);
    this.options = { ...DEFAULT_PROPS,
      ...options
    };
    this.tileset = json;
    this.loader = json.loader;
    this.type = json.type;
    this.url = json.url;
    this.basePath = json.basePath || dirname(this.url);
    this.modelMatrix = this.options.modelMatrix;
    this.ellipsoid = this.options.ellipsoid;
    this.lodMetricType = json.lodMetricType;
    this.lodMetricValue = json.lodMetricValue;
    this.refine = json.root.refine;
    this.loadOptions = this.options.loadOptions || {};
    this.root = null;
    this.roots = {};
    this.cartographicCenter = null;
    this.cartesianCenter = null;
    this.zoom = 1;
    this.boundingVolume = null;
    this.traverseCounter = 0;
    this.geometricError = 0;
    this._traverser = this._initializeTraverser();
    this._cache = new TilesetCache();
    this._requestScheduler = new RequestScheduler({
      throttleRequests: this.options.throttleRequests,
      maxRequests: this.options.maxRequests
    });
    this._frameNumber = 0;
    this._pendingCount = 0;
    this._tiles = {};
    this.selectedTiles = [];
    this._emptyTiles = [];
    this._requestedTiles = [];
    this.frameStateData = {};
    this.lastUpdatedVieports = null;
    this._queryParams = {};
    this._queryParamsString = '';
    this.maximumMemoryUsage = this.options.maximumMemoryUsage || 32;
    this.gpuMemoryUsageInBytes = 0;
    this.stats = new Stats({
      id: this.url
    });

    this._initializeStats();

    this._extensionsUsed = undefined;
    this.dynamicScreenSpaceErrorComputedDensity = 0.0;
    this.extras = null;
    this.asset = {};
    this.credits = {};
    this.description = this.options.description || '';
    this.tilesetInitializationPromise = this._initializeTileSet(json);
  }

  destroy() {
    this._destroy();
  }

  isLoaded() {
    return this._pendingCount === 0 && this._frameNumber !== 0 && this._requestedTiles.length === 0;
  }

  get tiles() {
    return Object.values(this._tiles);
  }

  get frameNumber() {
    return this._frameNumber;
  }

  get queryParams() {
    if (!this._queryParamsString) {
      this._queryParamsString = getQueryParamString(this._queryParams);
    }

    return this._queryParamsString;
  }

  setProps(props) {
    this.options = { ...this.options,
      ...props
    };
  }

  setOptions(options) {
    this.options = { ...this.options,
      ...options
    };
  }

  getTileUrl(tilePath) {
    const isDataUrl = tilePath.startsWith('data:');

    if (isDataUrl) {
      return tilePath;
    }

    return "".concat(tilePath).concat(this.queryParams);
  }

  hasExtension(extensionName) {
    return Boolean(this._extensionsUsed && this._extensionsUsed.indexOf(extensionName) > -1);
  }

  update(viewports = null) {
    this.tilesetInitializationPromise.then(() => {
      if (!viewports && this.lastUpdatedVieports) {
        viewports = this.lastUpdatedVieports;
      } else {
        this.lastUpdatedVieports = viewports;
      }

      if (viewports) {
        this.doUpdate(viewports);
      }
    });
  }

  async selectTiles(viewports = null) {
    await this.tilesetInitializationPromise;

    if (viewports) {
      this.lastUpdatedVieports = viewports;
    }

    if (!this.updatePromise) {
      this.updatePromise = new Promise(resolve => {
        setTimeout(() => {
          if (this.lastUpdatedVieports) {
            this.doUpdate(this.lastUpdatedVieports);
          }

          resolve(this._frameNumber);
          this.updatePromise = null;
        }, this.options.debounceTime);
      });
    }

    return this.updatePromise;
  }

  doUpdate(viewports) {
    if ('loadTiles' in this.options && !this.options.loadTiles) {
      return;
    }

    if (this.traverseCounter > 0) {
      return;
    }

    const preparedViewports = viewports instanceof Array ? viewports : [viewports];

    this._cache.reset();

    this._frameNumber++;
    this.traverseCounter = preparedViewports.length;
    const viewportsToTraverse = [];

    for (const viewport of preparedViewports) {
      const id = viewport.id;

      if (this._needTraverse(id)) {
        viewportsToTraverse.push(id);
      } else {
        this.traverseCounter--;
      }
    }

    for (const viewport of preparedViewports) {
      const id = viewport.id;

      if (!this.roots[id]) {
        this.roots[id] = this._initializeTileHeaders(this.tileset, null);
      }

      if (!viewportsToTraverse.includes(id)) {
        continue;
      }

      const frameState = getFrameState(viewport, this._frameNumber);

      this._traverser.traverse(this.roots[id], frameState, this.options);
    }
  }

  _needTraverse(viewportId) {
    let traverserId = viewportId;

    if (this.options.viewportTraversersMap) {
      traverserId = this.options.viewportTraversersMap[viewportId];
    }

    if (traverserId !== viewportId) {
      return false;
    }

    return true;
  }

  _onTraversalEnd(frameState) {
    const id = frameState.viewport.id;

    if (!this.frameStateData[id]) {
      this.frameStateData[id] = {
        selectedTiles: [],
        _requestedTiles: [],
        _emptyTiles: []
      };
    }

    const currentFrameStateData = this.frameStateData[id];
    const selectedTiles = Object.values(this._traverser.selectedTiles);
    const [filteredSelectedTiles, unselectedTiles] = limitSelectedTiles(selectedTiles, frameState, this.options.maximumTilesSelected);
    currentFrameStateData.selectedTiles = filteredSelectedTiles;

    for (const tile of unselectedTiles) {
      tile.unselect();
    }

    currentFrameStateData._requestedTiles = Object.values(this._traverser.requestedTiles);
    currentFrameStateData._emptyTiles = Object.values(this._traverser.emptyTiles);
    this.traverseCounter--;

    if (this.traverseCounter > 0) {
      return;
    }

    this._updateTiles();
  }

  _updateTiles() {
    this.selectedTiles = [];
    this._requestedTiles = [];
    this._emptyTiles = [];

    for (const frameStateKey in this.frameStateData) {
      const frameStateDataValue = this.frameStateData[frameStateKey];
      this.selectedTiles = this.selectedTiles.concat(frameStateDataValue.selectedTiles);
      this._requestedTiles = this._requestedTiles.concat(frameStateDataValue._requestedTiles);
      this._emptyTiles = this._emptyTiles.concat(frameStateDataValue._emptyTiles);
    }

    this.selectedTiles = this.options.onTraversalComplete(this.selectedTiles);

    for (const tile of this.selectedTiles) {
      this._tiles[tile.id] = tile;
    }

    this._loadTiles();

    this._unloadTiles();

    this._updateStats();
  }

  _tilesChanged(oldSelectedTiles, selectedTiles) {
    if (oldSelectedTiles.length !== selectedTiles.length) {
      return true;
    }

    const set1 = new Set(oldSelectedTiles.map(t => t.id));
    const set2 = new Set(selectedTiles.map(t => t.id));
    let changed = oldSelectedTiles.filter(x => !set2.has(x.id)).length > 0;
    changed = changed || selectedTiles.filter(x => !set1.has(x.id)).length > 0;
    return changed;
  }

  _loadTiles() {
    for (const tile of this._requestedTiles) {
      if (tile.contentUnloaded) {
        this._loadTile(tile);
      }
    }
  }

  _unloadTiles() {
    this._cache.unloadTiles(this, (tileset, tile) => tileset._unloadTile(tile));
  }

  _updateStats() {
    let tilesRenderable = 0;
    let pointsRenderable = 0;

    for (const tile of this.selectedTiles) {
      if (tile.contentAvailable && tile.content) {
        tilesRenderable++;

        if (tile.content.pointCount) {
          pointsRenderable += tile.content.pointCount;
        } else {
          pointsRenderable += tile.content.vertexCount;
        }
      }
    }

    this.stats.get(TILES_IN_VIEW).count = this.selectedTiles.length;
    this.stats.get(TILES_RENDERABLE).count = tilesRenderable;
    this.stats.get(POINTS_COUNT).count = pointsRenderable;
  }

  async _initializeTileSet(tilesetJson) {
    if (this.type === TILESET_TYPE.I3S) {
      this.calculateViewPropsI3S();
      tilesetJson.root = await tilesetJson.root;
    }

    this.root = this._initializeTileHeaders(tilesetJson, null);

    if (this.type === TILESET_TYPE.TILES3D) {
      this._initializeTiles3DTileset(tilesetJson);

      this.calculateViewPropsTiles3D();
    }

    if (this.type === TILESET_TYPE.I3S) {
      this._initializeI3STileset();
    }
  }

  calculateViewPropsI3S() {
    var _this$tileset$store;

    const fullExtent = this.tileset.fullExtent;

    if (fullExtent) {
      const {
        xmin,
        xmax,
        ymin,
        ymax,
        zmin,
        zmax
      } = fullExtent;
      this.cartographicCenter = new Vector3(xmin + (xmax - xmin) / 2, ymin + (ymax - ymin) / 2, zmin + (zmax - zmin) / 2);
      this.cartesianCenter = Ellipsoid.WGS84.cartographicToCartesian(this.cartographicCenter, new Vector3());
      this.zoom = getZoomFromFullExtent(fullExtent, this.cartographicCenter, this.cartesianCenter);
      return;
    }

    const extent = (_this$tileset$store = this.tileset.store) === null || _this$tileset$store === void 0 ? void 0 : _this$tileset$store.extent;

    if (extent) {
      const [xmin, ymin, xmax, ymax] = extent;
      this.cartographicCenter = new Vector3(xmin + (xmax - xmin) / 2, ymin + (ymax - ymin) / 2, 0);
      this.cartesianCenter = Ellipsoid.WGS84.cartographicToCartesian(this.cartographicCenter, new Vector3());
      this.zoom = getZoomFromExtent(extent, this.cartographicCenter, this.cartesianCenter);
      return;
    }

    console.warn('Extent is not defined in the tileset header');
    this.cartographicCenter = new Vector3();
    this.zoom = 1;
    return;
  }

  calculateViewPropsTiles3D() {
    const root = this.root;
    assert$7(root);
    const {
      center
    } = root.boundingVolume;

    if (!center) {
      console.warn('center was not pre-calculated for the root tile');
      this.cartographicCenter = new Vector3();
      this.zoom = 1;
      return;
    }

    if (center[0] !== 0 || center[1] !== 0 || center[2] !== 0) {
      this.cartographicCenter = Ellipsoid.WGS84.cartesianToCartographic(center, new Vector3());
    } else {
      this.cartographicCenter = new Vector3(0, 0, -Ellipsoid.WGS84.radii[0]);
    }

    this.cartesianCenter = center;
    this.zoom = getZoomFromBoundingVolume(root.boundingVolume, this.cartographicCenter);
  }

  _initializeStats() {
    this.stats.get(TILES_TOTAL);
    this.stats.get(TILES_LOADING);
    this.stats.get(TILES_IN_MEMORY);
    this.stats.get(TILES_IN_VIEW);
    this.stats.get(TILES_RENDERABLE);
    this.stats.get(TILES_LOADED);
    this.stats.get(TILES_UNLOADED);
    this.stats.get(TILES_LOAD_FAILED);
    this.stats.get(POINTS_COUNT);
    this.stats.get(TILES_GPU_MEMORY, 'memory');
  }

  _initializeTileHeaders(tilesetJson, parentTileHeader) {
    const rootTile = new TileHeader(this, tilesetJson.root, parentTileHeader);

    if (parentTileHeader) {
      parentTileHeader.children.push(rootTile);
      rootTile.depth = parentTileHeader.depth + 1;
    }

    if (this.type === TILESET_TYPE.TILES3D) {
      const stack = [];
      stack.push(rootTile);

      while (stack.length > 0) {
        const tile = stack.pop();
        this.stats.get(TILES_TOTAL).incrementCount();
        const children = tile.header.children || [];

        for (const childHeader of children) {
          const childTile = new TileHeader(this, childHeader, tile);
          tile.children.push(childTile);
          childTile.depth = tile.depth + 1;
          stack.push(childTile);
        }
      }
    }

    return rootTile;
  }

  _initializeTraverser() {
    let TraverserClass;
    const type = this.type;

    switch (type) {
      case TILESET_TYPE.TILES3D:
        TraverserClass = Tileset3DTraverser;
        break;

      case TILESET_TYPE.I3S:
        TraverserClass = I3STilesetTraverser;
        break;

      default:
        TraverserClass = TilesetTraverser;
    }

    return new TraverserClass({
      basePath: this.basePath,
      onTraversalEnd: this._onTraversalEnd.bind(this)
    });
  }

  _destroyTileHeaders(parentTile) {
    this._destroySubtree(parentTile);
  }

  async _loadTile(tile) {
    let loaded;

    try {
      this._onStartTileLoading();

      loaded = await tile.loadContent();
    } catch (error) {
      this._onTileLoadError(tile, error);
    } finally {
      this._onEndTileLoading();

      this._onTileLoad(tile, loaded);
    }
  }

  _onTileLoadError(tile, error) {
    this.stats.get(TILES_LOAD_FAILED).incrementCount();
    const message = error.message || error.toString();
    const url = tile.url;
    console.error("A 3D tile failed to load: ".concat(tile.url, " ").concat(message));
    this.options.onTileError(tile, message, url);
  }

  _onTileLoad(tile, loaded) {
    if (!loaded) {
      return;
    }

    if (this.type === TILESET_TYPE.I3S) {
      var _this$tileset, _this$tileset$nodePag;

      const nodesInNodePages = ((_this$tileset = this.tileset) === null || _this$tileset === void 0 ? void 0 : (_this$tileset$nodePag = _this$tileset.nodePagesTile) === null || _this$tileset$nodePag === void 0 ? void 0 : _this$tileset$nodePag.nodesInNodePages) || 0;
      this.stats.get(TILES_TOTAL).reset();
      this.stats.get(TILES_TOTAL).addCount(nodesInNodePages);
    }

    if (tile && tile.content) {
      calculateTransformProps(tile, tile.content);
    }

    this._addTileToCache(tile);

    this.options.onTileLoad(tile);
  }

  _onStartTileLoading() {
    this._pendingCount++;
    this.stats.get(TILES_LOADING).incrementCount();
  }

  _onEndTileLoading() {
    this._pendingCount--;
    this.stats.get(TILES_LOADING).decrementCount();
  }

  _addTileToCache(tile) {
    this._cache.add(this, tile, tileset => tileset._updateCacheStats(tile));
  }

  _updateCacheStats(tile) {
    this.stats.get(TILES_LOADED).incrementCount();
    this.stats.get(TILES_IN_MEMORY).incrementCount();
    this.gpuMemoryUsageInBytes += tile.content.byteLength || 0;
    this.stats.get(TILES_GPU_MEMORY).count = this.gpuMemoryUsageInBytes;
  }

  _unloadTile(tile) {
    this.gpuMemoryUsageInBytes -= tile.content && tile.content.byteLength || 0;
    this.stats.get(TILES_IN_MEMORY).decrementCount();
    this.stats.get(TILES_UNLOADED).incrementCount();
    this.stats.get(TILES_GPU_MEMORY).count = this.gpuMemoryUsageInBytes;
    this.options.onTileUnload(tile);
    tile.unloadContent();
  }

  _destroy() {
    const stack = [];

    if (this.root) {
      stack.push(this.root);
    }

    while (stack.length > 0) {
      const tile = stack.pop();

      for (const child of tile.children) {
        stack.push(child);
      }

      this._destroyTile(tile);
    }

    this.root = null;
  }

  _destroySubtree(tile) {
    const root = tile;
    const stack = [];
    stack.push(root);

    while (stack.length > 0) {
      tile = stack.pop();

      for (const child of tile.children) {
        stack.push(child);
      }

      if (tile !== root) {
        this._destroyTile(tile);
      }
    }

    root.children = [];
  }

  _destroyTile(tile) {
    this._cache.unloadTile(this, tile);

    this._unloadTile(tile);

    tile.destroy();
  }

  _initializeTiles3DTileset(tilesetJson) {
    this.asset = tilesetJson.asset;

    if (!this.asset) {
      throw new Error('Tileset must have an asset property.');
    }

    if (this.asset.version !== '0.0' && this.asset.version !== '1.0') {
      throw new Error('The tileset must be 3D Tiles version 0.0 or 1.0.');
    }

    if ('tilesetVersion' in this.asset) {
      this._queryParams.v = this.asset.tilesetVersion;
    }

    this.credits = {
      attributions: this.options.attributions || []
    };
    this.description = this.options.description || '';
    this.properties = tilesetJson.properties;
    this.geometricError = tilesetJson.geometricError;
    this._extensionsUsed = tilesetJson.extensionsUsed;
    this.extras = tilesetJson.extras;
  }

  _initializeI3STileset() {
    if (this.loadOptions.i3s && 'token' in this.loadOptions.i3s) {
      this._queryParams.token = this.loadOptions.i3s.token;
    }
  }

}

function getQueryParamString(queryParams) {
  const queryParamStrings = [];

  for (const key of Object.keys(queryParams)) {
    queryParamStrings.push("".concat(key, "=").concat(queryParams[key]));
  }

  switch (queryParamStrings.length) {
    case 0:
      return '';

    case 1:
      return "?".concat(queryParamStrings[0]);

    default:
      return "?".concat(queryParamStrings.join('&'));
  }
}

const VERSION$5 = "3.2.12" ;

const TILE3D_TYPE = {
  COMPOSITE: 'cmpt',
  POINT_CLOUD: 'pnts',
  BATCHED_3D_MODEL: 'b3dm',
  INSTANCED_3D_MODEL: 'i3dm',
  GEOMETRY: 'geom',
  VECTOR: 'vect',
  GLTF: 'glTF'
};

function getStringFromArrayBuffer(arrayBuffer, byteOffset, byteLength) {
  assert$7(arrayBuffer instanceof ArrayBuffer);
  const textDecoder = new TextDecoder('utf8');
  const typedArray = new Uint8Array(arrayBuffer, byteOffset, byteLength);
  const string = textDecoder.decode(typedArray);
  return string;
}
function getMagicString$1(arrayBuffer, byteOffset = 0) {
  const dataView = new DataView(arrayBuffer);
  return "".concat(String.fromCharCode(dataView.getUint8(byteOffset + 0))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 1))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 2))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 3)));
}

const VERSION$4 = "3.2.12" ;

const DEFAULT_DRACO_OPTIONS = {
  draco: {
    decoderType: typeof WebAssembly === 'object' ? 'wasm' : 'js',
    libraryPath: 'libs/',
    extraAttributes: {},
    attributeNameEntry: undefined
  }
};
const DracoLoader$1 = {
  name: 'Draco',
  id: 'draco',
  module: 'draco',
  shapes: ['mesh'],
  version: VERSION$4,
  worker: true,
  extensions: ['drc'],
  mimeTypes: ['application/octet-stream'],
  binary: true,
  tests: ['DRACO'],
  options: DEFAULT_DRACO_OPTIONS
};

function getMeshBoundingBox(attributes) {
  let minX = Infinity;
  let minY = Infinity;
  let minZ = Infinity;
  let maxX = -Infinity;
  let maxY = -Infinity;
  let maxZ = -Infinity;
  const positions = attributes.POSITION ? attributes.POSITION.value : [];
  const len = positions && positions.length;

  for (let i = 0; i < len; i += 3) {
    const x = positions[i];
    const y = positions[i + 1];
    const z = positions[i + 2];
    minX = x < minX ? x : minX;
    minY = y < minY ? y : minY;
    minZ = z < minZ ? z : minZ;
    maxX = x > maxX ? x : maxX;
    maxY = y > maxY ? y : maxY;
    maxZ = z > maxZ ? z : maxZ;
  }

  return [[minX, minY, minZ], [maxX, maxY, maxZ]];
}

function assert$3(condition, message) {
  if (!condition) {
    throw new Error(message || 'loader assertion failed.');
  }
}

class Schema {
  constructor(fields, metadata) {
    _defineProperty(this, "fields", void 0);

    _defineProperty(this, "metadata", void 0);

    assert$3(Array.isArray(fields));
    checkNames(fields);
    this.fields = fields;
    this.metadata = metadata || new Map();
  }

  compareTo(other) {
    if (this.metadata !== other.metadata) {
      return false;
    }

    if (this.fields.length !== other.fields.length) {
      return false;
    }

    for (let i = 0; i < this.fields.length; ++i) {
      if (!this.fields[i].compareTo(other.fields[i])) {
        return false;
      }
    }

    return true;
  }

  select(...columnNames) {
    const nameMap = Object.create(null);

    for (const name of columnNames) {
      nameMap[name] = true;
    }

    const selectedFields = this.fields.filter(field => nameMap[field.name]);
    return new Schema(selectedFields, this.metadata);
  }

  selectAt(...columnIndices) {
    const selectedFields = columnIndices.map(index => this.fields[index]).filter(Boolean);
    return new Schema(selectedFields, this.metadata);
  }

  assign(schemaOrFields) {
    let fields;
    let metadata = this.metadata;

    if (schemaOrFields instanceof Schema) {
      const otherSchema = schemaOrFields;
      fields = otherSchema.fields;
      metadata = mergeMaps(mergeMaps(new Map(), this.metadata), otherSchema.metadata);
    } else {
      fields = schemaOrFields;
    }

    const fieldMap = Object.create(null);

    for (const field of this.fields) {
      fieldMap[field.name] = field;
    }

    for (const field of fields) {
      fieldMap[field.name] = field;
    }

    const mergedFields = Object.values(fieldMap);
    return new Schema(mergedFields, metadata);
  }

}

function checkNames(fields) {
  const usedNames = {};

  for (const field of fields) {
    if (usedNames[field.name]) {
      console.warn('Schema: duplicated field name', field.name, field);
    }

    usedNames[field.name] = true;
  }
}

function mergeMaps(m1, m2) {
  return new Map([...(m1 || new Map()), ...(m2 || new Map())]);
}

class Field {
  constructor(name, type, nullable = false, metadata = new Map()) {
    _defineProperty(this, "name", void 0);

    _defineProperty(this, "type", void 0);

    _defineProperty(this, "nullable", void 0);

    _defineProperty(this, "metadata", void 0);

    this.name = name;
    this.type = type;
    this.nullable = nullable;
    this.metadata = metadata;
  }

  get typeId() {
    return this.type && this.type.typeId;
  }

  clone() {
    return new Field(this.name, this.type, this.nullable, this.metadata);
  }

  compareTo(other) {
    return this.name === other.name && this.type === other.type && this.nullable === other.nullable && this.metadata === other.metadata;
  }

  toString() {
    return "".concat(this.type).concat(this.nullable ? ', nullable' : '').concat(this.metadata ? ", metadata: ".concat(this.metadata) : '');
  }

}

let Type;

(function (Type) {
  Type[Type["NONE"] = 0] = "NONE";
  Type[Type["Null"] = 1] = "Null";
  Type[Type["Int"] = 2] = "Int";
  Type[Type["Float"] = 3] = "Float";
  Type[Type["Binary"] = 4] = "Binary";
  Type[Type["Utf8"] = 5] = "Utf8";
  Type[Type["Bool"] = 6] = "Bool";
  Type[Type["Decimal"] = 7] = "Decimal";
  Type[Type["Date"] = 8] = "Date";
  Type[Type["Time"] = 9] = "Time";
  Type[Type["Timestamp"] = 10] = "Timestamp";
  Type[Type["Interval"] = 11] = "Interval";
  Type[Type["List"] = 12] = "List";
  Type[Type["Struct"] = 13] = "Struct";
  Type[Type["Union"] = 14] = "Union";
  Type[Type["FixedSizeBinary"] = 15] = "FixedSizeBinary";
  Type[Type["FixedSizeList"] = 16] = "FixedSizeList";
  Type[Type["Map"] = 17] = "Map";
  Type[Type["Dictionary"] = -1] = "Dictionary";
  Type[Type["Int8"] = -2] = "Int8";
  Type[Type["Int16"] = -3] = "Int16";
  Type[Type["Int32"] = -4] = "Int32";
  Type[Type["Int64"] = -5] = "Int64";
  Type[Type["Uint8"] = -6] = "Uint8";
  Type[Type["Uint16"] = -7] = "Uint16";
  Type[Type["Uint32"] = -8] = "Uint32";
  Type[Type["Uint64"] = -9] = "Uint64";
  Type[Type["Float16"] = -10] = "Float16";
  Type[Type["Float32"] = -11] = "Float32";
  Type[Type["Float64"] = -12] = "Float64";
  Type[Type["DateDay"] = -13] = "DateDay";
  Type[Type["DateMillisecond"] = -14] = "DateMillisecond";
  Type[Type["TimestampSecond"] = -15] = "TimestampSecond";
  Type[Type["TimestampMillisecond"] = -16] = "TimestampMillisecond";
  Type[Type["TimestampMicrosecond"] = -17] = "TimestampMicrosecond";
  Type[Type["TimestampNanosecond"] = -18] = "TimestampNanosecond";
  Type[Type["TimeSecond"] = -19] = "TimeSecond";
  Type[Type["TimeMillisecond"] = -20] = "TimeMillisecond";
  Type[Type["TimeMicrosecond"] = -21] = "TimeMicrosecond";
  Type[Type["TimeNanosecond"] = -22] = "TimeNanosecond";
  Type[Type["DenseUnion"] = -23] = "DenseUnion";
  Type[Type["SparseUnion"] = -24] = "SparseUnion";
  Type[Type["IntervalDayTime"] = -25] = "IntervalDayTime";
  Type[Type["IntervalYearMonth"] = -26] = "IntervalYearMonth";
})(Type || (Type = {}));

let _Symbol$toStringTag, _Symbol$toStringTag2, _Symbol$toStringTag7;
class DataType {
  static isNull(x) {
    return x && x.typeId === Type.Null;
  }

  static isInt(x) {
    return x && x.typeId === Type.Int;
  }

  static isFloat(x) {
    return x && x.typeId === Type.Float;
  }

  static isBinary(x) {
    return x && x.typeId === Type.Binary;
  }

  static isUtf8(x) {
    return x && x.typeId === Type.Utf8;
  }

  static isBool(x) {
    return x && x.typeId === Type.Bool;
  }

  static isDecimal(x) {
    return x && x.typeId === Type.Decimal;
  }

  static isDate(x) {
    return x && x.typeId === Type.Date;
  }

  static isTime(x) {
    return x && x.typeId === Type.Time;
  }

  static isTimestamp(x) {
    return x && x.typeId === Type.Timestamp;
  }

  static isInterval(x) {
    return x && x.typeId === Type.Interval;
  }

  static isList(x) {
    return x && x.typeId === Type.List;
  }

  static isStruct(x) {
    return x && x.typeId === Type.Struct;
  }

  static isUnion(x) {
    return x && x.typeId === Type.Union;
  }

  static isFixedSizeBinary(x) {
    return x && x.typeId === Type.FixedSizeBinary;
  }

  static isFixedSizeList(x) {
    return x && x.typeId === Type.FixedSizeList;
  }

  static isMap(x) {
    return x && x.typeId === Type.Map;
  }

  static isDictionary(x) {
    return x && x.typeId === Type.Dictionary;
  }

  get typeId() {
    return Type.NONE;
  }

  compareTo(other) {
    return this === other;
  }

}
_Symbol$toStringTag = Symbol.toStringTag;
class Int extends DataType {
  constructor(isSigned, bitWidth) {
    super();

    _defineProperty(this, "isSigned", void 0);

    _defineProperty(this, "bitWidth", void 0);

    this.isSigned = isSigned;
    this.bitWidth = bitWidth;
  }

  get typeId() {
    return Type.Int;
  }

  get [_Symbol$toStringTag]() {
    return 'Int';
  }

  toString() {
    return "".concat(this.isSigned ? 'I' : 'Ui', "nt").concat(this.bitWidth);
  }

}
class Int8 extends Int {
  constructor() {
    super(true, 8);
  }

}
class Int16 extends Int {
  constructor() {
    super(true, 16);
  }

}
class Int32 extends Int {
  constructor() {
    super(true, 32);
  }

}
class Uint8 extends Int {
  constructor() {
    super(false, 8);
  }

}
class Uint16 extends Int {
  constructor() {
    super(false, 16);
  }

}
class Uint32 extends Int {
  constructor() {
    super(false, 32);
  }

}
const Precision = {
  HALF: 16,
  SINGLE: 32,
  DOUBLE: 64
};
_Symbol$toStringTag2 = Symbol.toStringTag;
class Float extends DataType {
  constructor(precision) {
    super();

    _defineProperty(this, "precision", void 0);

    this.precision = precision;
  }

  get typeId() {
    return Type.Float;
  }

  get [_Symbol$toStringTag2]() {
    return 'Float';
  }

  toString() {
    return "Float".concat(this.precision);
  }

}
class Float32 extends Float {
  constructor() {
    super(Precision.SINGLE);
  }

}
class Float64 extends Float {
  constructor() {
    super(Precision.DOUBLE);
  }

}
_Symbol$toStringTag7 = Symbol.toStringTag;
class FixedSizeList extends DataType {
  constructor(listSize, child) {
    super();

    _defineProperty(this, "listSize", void 0);

    _defineProperty(this, "children", void 0);

    this.listSize = listSize;
    this.children = [child];
  }

  get typeId() {
    return Type.FixedSizeList;
  }

  get valueType() {
    return this.children[0].type;
  }

  get valueField() {
    return this.children[0];
  }

  get [_Symbol$toStringTag7]() {
    return 'FixedSizeList';
  }

  toString() {
    return "FixedSizeList[".concat(this.listSize, "]<").concat(this.valueType, ">");
  }

}

function getArrowTypeFromTypedArray(array) {
  switch (array.constructor) {
    case Int8Array:
      return new Int8();

    case Uint8Array:
      return new Uint8();

    case Int16Array:
      return new Int16();

    case Uint16Array:
      return new Uint16();

    case Int32Array:
      return new Int32();

    case Uint32Array:
      return new Uint32();

    case Float32Array:
      return new Float32();

    case Float64Array:
      return new Float64();

    default:
      throw new Error('array type not supported');
  }
}

function deduceMeshField(attributeName, attribute, optionalMetadata) {
  const type = getArrowTypeFromTypedArray(attribute.value);
  const metadata = optionalMetadata ? optionalMetadata : makeMeshAttributeMetadata(attribute);
  const field = new Field(attributeName, new FixedSizeList(attribute.size, new Field('value', type)), false, metadata);
  return field;
}

function makeMeshAttributeMetadata(attribute) {
  const result = new Map();

  if ('byteOffset' in attribute) {
    result.set('byteOffset', attribute.byteOffset.toString(10));
  }

  if ('byteStride' in attribute) {
    result.set('byteStride', attribute.byteStride.toString(10));
  }

  if ('normalized' in attribute) {
    result.set('normalized', attribute.normalized.toString());
  }

  return result;
}

function getDracoSchema(attributes, loaderData, indices) {
  const metadataMap = makeMetadata(loaderData.metadata);
  const fields = [];
  const namedLoaderDataAttributes = transformAttributesLoaderData(loaderData.attributes);

  for (const attributeName in attributes) {
    const attribute = attributes[attributeName];
    const field = getArrowFieldFromAttribute(attributeName, attribute, namedLoaderDataAttributes[attributeName]);
    fields.push(field);
  }

  if (indices) {
    const indicesField = getArrowFieldFromAttribute('indices', indices);
    fields.push(indicesField);
  }

  return new Schema(fields, metadataMap);
}

function transformAttributesLoaderData(loaderData) {
  const result = {};

  for (const key in loaderData) {
    const dracoAttribute = loaderData[key];
    result[dracoAttribute.name || 'undefined'] = dracoAttribute;
  }

  return result;
}

function getArrowFieldFromAttribute(attributeName, attribute, loaderData) {
  const metadataMap = loaderData ? makeMetadata(loaderData.metadata) : undefined;
  const field = deduceMeshField(attributeName, attribute, metadataMap);
  return field;
}

function makeMetadata(metadata) {
  const metadataMap = new Map();

  for (const key in metadata) {
    metadataMap.set("".concat(key, ".string"), JSON.stringify(metadata[key]));
  }

  return metadataMap;
}

const DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP = {
  POSITION: 'POSITION',
  NORMAL: 'NORMAL',
  COLOR: 'COLOR_0',
  TEX_COORD: 'TEXCOORD_0'
};
const DRACO_DATA_TYPE_TO_TYPED_ARRAY_MAP = {
  1: Int8Array,
  2: Uint8Array,
  3: Int16Array,
  4: Uint16Array,
  5: Int32Array,
  6: Uint32Array,
  9: Float32Array
};
const INDEX_ITEM_SIZE = 4;
class DracoParser {
  constructor(draco) {
    _defineProperty(this, "draco", void 0);

    _defineProperty(this, "decoder", void 0);

    _defineProperty(this, "metadataQuerier", void 0);

    this.draco = draco;
    this.decoder = new this.draco.Decoder();
    this.metadataQuerier = new this.draco.MetadataQuerier();
  }

  destroy() {
    this.draco.destroy(this.decoder);
    this.draco.destroy(this.metadataQuerier);
  }

  parseSync(arrayBuffer, options = {}) {
    const buffer = new this.draco.DecoderBuffer();
    buffer.Init(new Int8Array(arrayBuffer), arrayBuffer.byteLength);

    this._disableAttributeTransforms(options);

    const geometry_type = this.decoder.GetEncodedGeometryType(buffer);
    const dracoGeometry = geometry_type === this.draco.TRIANGULAR_MESH ? new this.draco.Mesh() : new this.draco.PointCloud();

    try {
      let dracoStatus;

      switch (geometry_type) {
        case this.draco.TRIANGULAR_MESH:
          dracoStatus = this.decoder.DecodeBufferToMesh(buffer, dracoGeometry);
          break;

        case this.draco.POINT_CLOUD:
          dracoStatus = this.decoder.DecodeBufferToPointCloud(buffer, dracoGeometry);
          break;

        default:
          throw new Error('DRACO: Unknown geometry type.');
      }

      if (!dracoStatus.ok() || !dracoGeometry.ptr) {
        const message = "DRACO decompression failed: ".concat(dracoStatus.error_msg());
        throw new Error(message);
      }

      const loaderData = this._getDracoLoaderData(dracoGeometry, geometry_type, options);

      const geometry = this._getMeshData(dracoGeometry, loaderData, options);

      const boundingBox = getMeshBoundingBox(geometry.attributes);
      const schema = getDracoSchema(geometry.attributes, loaderData, geometry.indices);
      const data = {
        loader: 'draco',
        loaderData,
        header: {
          vertexCount: dracoGeometry.num_points(),
          boundingBox
        },
        ...geometry,
        schema
      };
      return data;
    } finally {
      this.draco.destroy(buffer);

      if (dracoGeometry) {
        this.draco.destroy(dracoGeometry);
      }
    }
  }

  _getDracoLoaderData(dracoGeometry, geometry_type, options) {
    const metadata = this._getTopLevelMetadata(dracoGeometry);

    const attributes = this._getDracoAttributes(dracoGeometry, options);

    return {
      geometry_type,
      num_attributes: dracoGeometry.num_attributes(),
      num_points: dracoGeometry.num_points(),
      num_faces: dracoGeometry instanceof this.draco.Mesh ? dracoGeometry.num_faces() : 0,
      metadata,
      attributes
    };
  }

  _getDracoAttributes(dracoGeometry, options) {
    const dracoAttributes = {};

    for (let attributeId = 0; attributeId < dracoGeometry.num_attributes(); attributeId++) {
      const dracoAttribute = this.decoder.GetAttribute(dracoGeometry, attributeId);

      const metadata = this._getAttributeMetadata(dracoGeometry, attributeId);

      dracoAttributes[dracoAttribute.unique_id()] = {
        unique_id: dracoAttribute.unique_id(),
        attribute_type: dracoAttribute.attribute_type(),
        data_type: dracoAttribute.data_type(),
        num_components: dracoAttribute.num_components(),
        byte_offset: dracoAttribute.byte_offset(),
        byte_stride: dracoAttribute.byte_stride(),
        normalized: dracoAttribute.normalized(),
        attribute_index: attributeId,
        metadata
      };

      const quantization = this._getQuantizationTransform(dracoAttribute, options);

      if (quantization) {
        dracoAttributes[dracoAttribute.unique_id()].quantization_transform = quantization;
      }

      const octahedron = this._getOctahedronTransform(dracoAttribute, options);

      if (octahedron) {
        dracoAttributes[dracoAttribute.unique_id()].octahedron_transform = octahedron;
      }
    }

    return dracoAttributes;
  }

  _getMeshData(dracoGeometry, loaderData, options) {
    const attributes = this._getMeshAttributes(loaderData, dracoGeometry, options);

    const positionAttribute = attributes.POSITION;

    if (!positionAttribute) {
      throw new Error('DRACO: No position attribute found.');
    }

    if (dracoGeometry instanceof this.draco.Mesh) {
      switch (options.topology) {
        case 'triangle-strip':
          return {
            topology: 'triangle-strip',
            mode: 4,
            attributes,
            indices: {
              value: this._getTriangleStripIndices(dracoGeometry),
              size: 1
            }
          };

        case 'triangle-list':
        default:
          return {
            topology: 'triangle-list',
            mode: 5,
            attributes,
            indices: {
              value: this._getTriangleListIndices(dracoGeometry),
              size: 1
            }
          };
      }
    }

    return {
      topology: 'point-list',
      mode: 0,
      attributes
    };
  }

  _getMeshAttributes(loaderData, dracoGeometry, options) {
    const attributes = {};

    for (const loaderAttribute of Object.values(loaderData.attributes)) {
      const attributeName = this._deduceAttributeName(loaderAttribute, options);

      loaderAttribute.name = attributeName;

      const {
        value,
        size
      } = this._getAttributeValues(dracoGeometry, loaderAttribute);

      attributes[attributeName] = {
        value,
        size,
        byteOffset: loaderAttribute.byte_offset,
        byteStride: loaderAttribute.byte_stride,
        normalized: loaderAttribute.normalized
      };
    }

    return attributes;
  }

  _getTriangleListIndices(dracoGeometry) {
    const numFaces = dracoGeometry.num_faces();
    const numIndices = numFaces * 3;
    const byteLength = numIndices * INDEX_ITEM_SIZE;

    const ptr = this.draco._malloc(byteLength);

    try {
      this.decoder.GetTrianglesUInt32Array(dracoGeometry, byteLength, ptr);
      return new Uint32Array(this.draco.HEAPF32.buffer, ptr, numIndices).slice();
    } finally {
      this.draco._free(ptr);
    }
  }

  _getTriangleStripIndices(dracoGeometry) {
    const dracoArray = new this.draco.DracoInt32Array();

    try {
      this.decoder.GetTriangleStripsFromMesh(dracoGeometry, dracoArray);
      return getUint32Array(dracoArray);
    } finally {
      this.draco.destroy(dracoArray);
    }
  }

  _getAttributeValues(dracoGeometry, attribute) {
    const TypedArrayCtor = DRACO_DATA_TYPE_TO_TYPED_ARRAY_MAP[attribute.data_type];
    const numComponents = attribute.num_components;
    const numPoints = dracoGeometry.num_points();
    const numValues = numPoints * numComponents;
    const byteLength = numValues * TypedArrayCtor.BYTES_PER_ELEMENT;
    const dataType = getDracoDataType(this.draco, TypedArrayCtor);
    let value;

    const ptr = this.draco._malloc(byteLength);

    try {
      const dracoAttribute = this.decoder.GetAttribute(dracoGeometry, attribute.attribute_index);
      this.decoder.GetAttributeDataArrayForAllPoints(dracoGeometry, dracoAttribute, dataType, byteLength, ptr);
      value = new TypedArrayCtor(this.draco.HEAPF32.buffer, ptr, numValues).slice();
    } finally {
      this.draco._free(ptr);
    }

    return {
      value,
      size: numComponents
    };
  }

  _deduceAttributeName(attribute, options) {
    const uniqueId = attribute.unique_id;

    for (const [attributeName, attributeUniqueId] of Object.entries(options.extraAttributes || {})) {
      if (attributeUniqueId === uniqueId) {
        return attributeName;
      }
    }

    const thisAttributeType = attribute.attribute_type;

    for (const dracoAttributeConstant in DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP) {
      const attributeType = this.draco[dracoAttributeConstant];

      if (attributeType === thisAttributeType) {
        return DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP[dracoAttributeConstant];
      }
    }

    const entryName = options.attributeNameEntry || 'name';

    if (attribute.metadata[entryName]) {
      return attribute.metadata[entryName].string;
    }

    return "CUSTOM_ATTRIBUTE_".concat(uniqueId);
  }

  _getTopLevelMetadata(dracoGeometry) {
    const dracoMetadata = this.decoder.GetMetadata(dracoGeometry);
    return this._getDracoMetadata(dracoMetadata);
  }

  _getAttributeMetadata(dracoGeometry, attributeId) {
    const dracoMetadata = this.decoder.GetAttributeMetadata(dracoGeometry, attributeId);
    return this._getDracoMetadata(dracoMetadata);
  }

  _getDracoMetadata(dracoMetadata) {
    if (!dracoMetadata || !dracoMetadata.ptr) {
      return {};
    }

    const result = {};
    const numEntries = this.metadataQuerier.NumEntries(dracoMetadata);

    for (let entryIndex = 0; entryIndex < numEntries; entryIndex++) {
      const entryName = this.metadataQuerier.GetEntryName(dracoMetadata, entryIndex);
      result[entryName] = this._getDracoMetadataField(dracoMetadata, entryName);
    }

    return result;
  }

  _getDracoMetadataField(dracoMetadata, entryName) {
    const dracoArray = new this.draco.DracoInt32Array();

    try {
      this.metadataQuerier.GetIntEntryArray(dracoMetadata, entryName, dracoArray);
      const intArray = getInt32Array(dracoArray);
      return {
        int: this.metadataQuerier.GetIntEntry(dracoMetadata, entryName),
        string: this.metadataQuerier.GetStringEntry(dracoMetadata, entryName),
        double: this.metadataQuerier.GetDoubleEntry(dracoMetadata, entryName),
        intArray
      };
    } finally {
      this.draco.destroy(dracoArray);
    }
  }

  _disableAttributeTransforms(options) {
    const {
      quantizedAttributes = [],
      octahedronAttributes = []
    } = options;
    const skipAttributes = [...quantizedAttributes, ...octahedronAttributes];

    for (const dracoAttributeName of skipAttributes) {
      this.decoder.SkipAttributeTransform(this.draco[dracoAttributeName]);
    }
  }

  _getQuantizationTransform(dracoAttribute, options) {
    const {
      quantizedAttributes = []
    } = options;
    const attribute_type = dracoAttribute.attribute_type();
    const skip = quantizedAttributes.map(type => this.decoder[type]).includes(attribute_type);

    if (skip) {
      const transform = new this.draco.AttributeQuantizationTransform();

      try {
        if (transform.InitFromAttribute(dracoAttribute)) {
          return {
            quantization_bits: transform.quantization_bits(),
            range: transform.range(),
            min_values: new Float32Array([1, 2, 3]).map(i => transform.min_value(i))
          };
        }
      } finally {
        this.draco.destroy(transform);
      }
    }

    return null;
  }

  _getOctahedronTransform(dracoAttribute, options) {
    const {
      octahedronAttributes = []
    } = options;
    const attribute_type = dracoAttribute.attribute_type();
    const octahedron = octahedronAttributes.map(type => this.decoder[type]).includes(attribute_type);

    if (octahedron) {
      const transform = new this.draco.AttributeQuantizationTransform();

      try {
        if (transform.InitFromAttribute(dracoAttribute)) {
          return {
            quantization_bits: transform.quantization_bits()
          };
        }
      } finally {
        this.draco.destroy(transform);
      }
    }

    return null;
  }

}

function getDracoDataType(draco, attributeType) {
  switch (attributeType) {
    case Float32Array:
      return draco.DT_FLOAT32;

    case Int8Array:
      return draco.DT_INT8;

    case Int16Array:
      return draco.DT_INT16;

    case Int32Array:
      return draco.DT_INT32;

    case Uint8Array:
      return draco.DT_UINT8;

    case Uint16Array:
      return draco.DT_UINT16;

    case Uint32Array:
      return draco.DT_UINT32;

    default:
      return draco.DT_INVALID;
  }
}

function getInt32Array(dracoArray) {
  const numValues = dracoArray.size();
  const intArray = new Int32Array(numValues);

  for (let i = 0; i < numValues; i++) {
    intArray[i] = dracoArray.GetValue(i);
  }

  return intArray;
}

function getUint32Array(dracoArray) {
  const numValues = dracoArray.size();
  const intArray = new Int32Array(numValues);

  for (let i = 0; i < numValues; i++) {
    intArray[i] = dracoArray.GetValue(i);
  }

  return intArray;
}

const DRACO_VERSION = '1.4.1';
const DRACO_JS_DECODER_URL = "https://www.gstatic.com/draco/versioned/decoders/".concat(DRACO_VERSION, "/draco_decoder.js");
const DRACO_WASM_WRAPPER_URL = "https://www.gstatic.com/draco/versioned/decoders/".concat(DRACO_VERSION, "/draco_wasm_wrapper.js");
const DRACO_WASM_DECODER_URL = "https://www.gstatic.com/draco/versioned/decoders/".concat(DRACO_VERSION, "/draco_decoder.wasm");
let loadDecoderPromise;
async function loadDracoDecoderModule(options) {
  const modules = options.modules || {};

  if (modules.draco3d) {
    loadDecoderPromise = loadDecoderPromise || modules.draco3d.createDecoderModule({}).then(draco => {
      return {
        draco
      };
    });
  } else {
    loadDecoderPromise = loadDecoderPromise || loadDracoDecoder(options);
  }

  return await loadDecoderPromise;
}

async function loadDracoDecoder(options) {
  let DracoDecoderModule;
  let wasmBinary;

  switch (options.draco && options.draco.decoderType) {
    case 'js':
      DracoDecoderModule = await loadLibrary(DRACO_JS_DECODER_URL, 'draco', options);
      break;

    case 'wasm':
    default:
      [DracoDecoderModule, wasmBinary] = await Promise.all([await loadLibrary(DRACO_WASM_WRAPPER_URL, 'draco', options), await loadLibrary(DRACO_WASM_DECODER_URL, 'draco', options)]);
  }

  DracoDecoderModule = DracoDecoderModule || globalThis.DracoDecoderModule;
  return await initializeDracoDecoder(DracoDecoderModule, wasmBinary);
}

function initializeDracoDecoder(DracoDecoderModule, wasmBinary) {
  const options = {};

  if (wasmBinary) {
    options.wasmBinary = wasmBinary;
  }

  return new Promise(resolve => {
    DracoDecoderModule({ ...options,
      onModuleLoaded: draco => resolve({
        draco
      })
    });
  });
}

({
  id: isBrowser$1 ? 'draco-writer' : 'draco-writer-nodejs',
  name: 'Draco compressed geometry writer',
  module: 'draco',
  version: VERSION$4,
  worker: true,
  options: {
    draco: {},
    source: null
  }
});
const DracoLoader = { ...DracoLoader$1,
  parse: parse$2
};

async function parse$2(arrayBuffer, options) {
  const {
    draco
  } = await loadDracoDecoderModule(options);
  const dracoParser = new DracoParser(draco);

  try {
    return dracoParser.parseSync(arrayBuffer, options === null || options === void 0 ? void 0 : options.draco);
  } finally {
    dracoParser.destroy();
  }
}

const GL_PRIMITIVE_MODE = {
  POINTS: 0x0000,
  LINES: 0x0001,
  LINE_LOOP: 0x0002,
  LINE_STRIP: 0x0003,
  TRIANGLES: 0x0004,
  TRIANGLE_STRIP: 0x0005,
  TRIANGLE_FAN: 0x0006
};
const GL_TYPE = {
  BYTE: 5120,
  UNSIGNED_BYTE: 5121,
  SHORT: 5122,
  UNSIGNED_SHORT: 5123,
  INT: 5124,
  UNSIGNED_INT: 5125,
  FLOAT: 5126,
  DOUBLE: 5130
};
const GL$1 = { ...GL_PRIMITIVE_MODE,
  ...GL_TYPE
};

const GL_TYPE_TO_ARRAY_TYPE = {
  [GL_TYPE.DOUBLE]: Float64Array,
  [GL_TYPE.FLOAT]: Float32Array,
  [GL_TYPE.UNSIGNED_SHORT]: Uint16Array,
  [GL_TYPE.UNSIGNED_INT]: Uint32Array,
  [GL_TYPE.UNSIGNED_BYTE]: Uint8Array,
  [GL_TYPE.BYTE]: Int8Array,
  [GL_TYPE.SHORT]: Int16Array,
  [GL_TYPE.INT]: Int32Array
};
const NAME_TO_GL_TYPE = {
  DOUBLE: GL_TYPE.DOUBLE,
  FLOAT: GL_TYPE.FLOAT,
  UNSIGNED_SHORT: GL_TYPE.UNSIGNED_SHORT,
  UNSIGNED_INT: GL_TYPE.UNSIGNED_INT,
  UNSIGNED_BYTE: GL_TYPE.UNSIGNED_BYTE,
  BYTE: GL_TYPE.BYTE,
  SHORT: GL_TYPE.SHORT,
  INT: GL_TYPE.INT
};
const ERR_TYPE_CONVERSION = 'Failed to convert GL type';
class GLType {
  static fromTypedArray(arrayOrType) {
    arrayOrType = ArrayBuffer.isView(arrayOrType) ? arrayOrType.constructor : arrayOrType;

    for (const glType in GL_TYPE_TO_ARRAY_TYPE) {
      const ArrayType = GL_TYPE_TO_ARRAY_TYPE[glType];

      if (ArrayType === arrayOrType) {
        return glType;
      }
    }

    throw new Error(ERR_TYPE_CONVERSION);
  }

  static fromName(name) {
    const glType = NAME_TO_GL_TYPE[name];

    if (!glType) {
      throw new Error(ERR_TYPE_CONVERSION);
    }

    return glType;
  }

  static getArrayType(glType) {
    switch (glType) {
      case GL_TYPE.UNSIGNED_SHORT_5_6_5:
      case GL_TYPE.UNSIGNED_SHORT_4_4_4_4:
      case GL_TYPE.UNSIGNED_SHORT_5_5_5_1:
        return Uint16Array;

      default:
        const ArrayType = GL_TYPE_TO_ARRAY_TYPE[glType];

        if (!ArrayType) {
          throw new Error(ERR_TYPE_CONVERSION);
        }

        return ArrayType;
    }
  }

  static getByteSize(glType) {
    const ArrayType = GLType.getArrayType(glType);
    return ArrayType.BYTES_PER_ELEMENT;
  }

  static validate(glType) {
    return Boolean(GLType.getArrayType(glType));
  }

  static createTypedArray(glType, buffer, byteOffset = 0, length) {
    if (length === undefined) {
      length = (buffer.byteLength - byteOffset) / GLType.getByteSize(glType);
    }

    const ArrayType = GLType.getArrayType(glType);
    return new ArrayType(buffer, byteOffset, length);
  }

}

function assert$2(condition, message) {
  if (!condition) {
    throw new Error("math.gl assertion failed. ".concat(message));
  }
}

function decodeRGB565(rgb565, target = [0, 0, 0]) {
  const r5 = rgb565 >> 11 & 31;
  const g6 = rgb565 >> 5 & 63;
  const b5 = rgb565 & 31;
  target[0] = r5 << 3;
  target[1] = g6 << 2;
  target[2] = b5 << 3;
  return target;
}

new Vector2();
new Vector3();
new Vector2();
new Vector2();

function fromSNorm(value, rangeMaximum = 255) {
  return clamp(value, 0.0, rangeMaximum) / rangeMaximum * 2.0 - 1.0;
}

function signNotZero(value) {
  return value < 0.0 ? -1.0 : 1.0;
}
function octDecodeInRange(x, y, rangeMax, result) {
  assert$2(result);

  if (x < 0 || x > rangeMax || y < 0 || y > rangeMax) {
    throw new Error("x and y must be unsigned normalized integers between 0 and ".concat(rangeMax));
  }

  result.x = fromSNorm(x, rangeMax);
  result.y = fromSNorm(y, rangeMax);
  result.z = 1.0 - (Math.abs(result.x) + Math.abs(result.y));

  if (result.z < 0.0) {
    const oldVX = result.x;
    result.x = (1.0 - Math.abs(result.y)) * signNotZero(oldVX);
    result.y = (1.0 - Math.abs(oldVX)) * signNotZero(result.y);
  }

  return result.normalize();
}
function octDecode(x, y, result) {
  return octDecodeInRange(x, y, 255, result);
}

class Tile3DFeatureTable {
  constructor(featureTableJson, featureTableBinary) {
    _defineProperty(this, "json", void 0);

    _defineProperty(this, "buffer", void 0);

    _defineProperty(this, "featuresLength", 0);

    _defineProperty(this, "_cachedTypedArrays", {});

    this.json = featureTableJson;
    this.buffer = featureTableBinary;
  }

  getExtension(extensionName) {
    return this.json.extensions && this.json.extensions[extensionName];
  }

  hasProperty(propertyName) {
    return Boolean(this.json[propertyName]);
  }

  getGlobalProperty(propertyName, componentType = GL$1.UNSIGNED_INT, componentLength = 1) {
    const jsonValue = this.json[propertyName];

    if (jsonValue && Number.isFinite(jsonValue.byteOffset)) {
      return this._getTypedArrayFromBinary(propertyName, componentType, componentLength, 1, jsonValue.byteOffset);
    }

    return jsonValue;
  }

  getPropertyArray(propertyName, componentType, componentLength) {
    const jsonValue = this.json[propertyName];

    if (jsonValue && Number.isFinite(jsonValue.byteOffset)) {
      if ('componentType' in jsonValue) {
        componentType = GLType.fromName(jsonValue.componentType);
      }

      return this._getTypedArrayFromBinary(propertyName, componentType, componentLength, this.featuresLength, jsonValue.byteOffset);
    }

    return this._getTypedArrayFromArray(propertyName, componentType, jsonValue);
  }

  getProperty(propertyName, componentType, componentLength, featureId, result) {
    const jsonValue = this.json[propertyName];

    if (!jsonValue) {
      return jsonValue;
    }

    const typedArray = this.getPropertyArray(propertyName, componentType, componentLength);

    if (componentLength === 1) {
      return typedArray[featureId];
    }

    for (let i = 0; i < componentLength; ++i) {
      result[i] = typedArray[componentLength * featureId + i];
    }

    return result;
  }

  _getTypedArrayFromBinary(propertyName, componentType, componentLength, count, byteOffset) {
    const cachedTypedArrays = this._cachedTypedArrays;
    let typedArray = cachedTypedArrays[propertyName];

    if (!typedArray) {
      typedArray = GLType.createTypedArray(componentType, this.buffer.buffer, this.buffer.byteOffset + byteOffset, count * componentLength);
      cachedTypedArrays[propertyName] = typedArray;
    }

    return typedArray;
  }

  _getTypedArrayFromArray(propertyName, componentType, array) {
    const cachedTypedArrays = this._cachedTypedArrays;
    let typedArray = cachedTypedArrays[propertyName];

    if (!typedArray) {
      typedArray = GLType.createTypedArray(componentType, array);
      cachedTypedArrays[propertyName] = typedArray;
    }

    return typedArray;
  }

}

const COMPONENTS_PER_ATTRIBUTE = {
  SCALAR: 1,
  VEC2: 2,
  VEC3: 3,
  VEC4: 4,
  MAT2: 4,
  MAT3: 9,
  MAT4: 16
};
const UNPACKER = {
  SCALAR: (values, i) => values[i],
  VEC2: (values, i) => [values[2 * i + 0], values[2 * i + 1]],
  VEC3: (values, i) => [values[3 * i + 0], values[3 * i + 1], values[3 * i + 2]],
  VEC4: (values, i) => [values[4 * i + 0], values[4 * i + 1], values[4 * i + 2], values[4 * i + 3]],
  MAT2: (values, i) => [values[4 * i + 0], values[4 * i + 1], values[4 * i + 2], values[4 * i + 3]],
  MAT3: (values, i) => [values[9 * i + 0], values[9 * i + 1], values[9 * i + 2], values[9 * i + 3], values[9 * i + 4], values[9 * i + 5], values[9 * i + 6], values[9 * i + 7], values[9 * i + 8]],
  MAT4: (values, i) => [values[16 * i + 0], values[16 * i + 1], values[16 * i + 2], values[16 * i + 3], values[16 * i + 4], values[16 * i + 5], values[16 * i + 6], values[16 * i + 7], values[16 * i + 8], values[16 * i + 9], values[16 * i + 10], values[16 * i + 11], values[16 * i + 12], values[16 * i + 13], values[16 * i + 14], values[16 * i + 15]]
};
const PACKER = {
  SCALAR: (x, values, i) => {
    values[i] = x;
  },
  VEC2: (x, values, i) => {
    values[2 * i + 0] = x[0];
    values[2 * i + 1] = x[1];
  },
  VEC3: (x, values, i) => {
    values[3 * i + 0] = x[0];
    values[3 * i + 1] = x[1];
    values[3 * i + 2] = x[2];
  },
  VEC4: (x, values, i) => {
    values[4 * i + 0] = x[0];
    values[4 * i + 1] = x[1];
    values[4 * i + 2] = x[2];
    values[4 * i + 3] = x[3];
  },
  MAT2: (x, values, i) => {
    values[4 * i + 0] = x[0];
    values[4 * i + 1] = x[1];
    values[4 * i + 2] = x[2];
    values[4 * i + 3] = x[3];
  },
  MAT3: (x, values, i) => {
    values[9 * i + 0] = x[0];
    values[9 * i + 1] = x[1];
    values[9 * i + 2] = x[2];
    values[9 * i + 3] = x[3];
    values[9 * i + 4] = x[4];
    values[9 * i + 5] = x[5];
    values[9 * i + 6] = x[6];
    values[9 * i + 7] = x[7];
    values[9 * i + 8] = x[8];
    values[9 * i + 9] = x[9];
  },
  MAT4: (x, values, i) => {
    values[16 * i + 0] = x[0];
    values[16 * i + 1] = x[1];
    values[16 * i + 2] = x[2];
    values[16 * i + 3] = x[3];
    values[16 * i + 4] = x[4];
    values[16 * i + 5] = x[5];
    values[16 * i + 6] = x[6];
    values[16 * i + 7] = x[7];
    values[16 * i + 8] = x[8];
    values[16 * i + 9] = x[9];
    values[16 * i + 10] = x[10];
    values[16 * i + 11] = x[11];
    values[16 * i + 12] = x[12];
    values[16 * i + 13] = x[13];
    values[16 * i + 14] = x[14];
    values[16 * i + 15] = x[15];
  }
};
function createTypedArrayFromAccessor(tile3DAccessor, buffer, byteOffset, length) {
  const {
    componentType
  } = tile3DAccessor;
  assert$7(tile3DAccessor.componentType);
  const type = typeof componentType === 'string' ? GLType.fromName(componentType) : componentType;
  const size = COMPONENTS_PER_ATTRIBUTE[tile3DAccessor.type];
  const unpacker = UNPACKER[tile3DAccessor.type];
  const packer = PACKER[tile3DAccessor.type];
  byteOffset += tile3DAccessor.byteOffset;
  const values = GLType.createTypedArray(type, buffer, byteOffset, size * length);
  return {
    values,
    type,
    size,
    unpacker,
    packer
  };
}

const defined$1 = x => x !== undefined;

function initializeHierarchy(batchTable, jsonHeader, binaryBody) {
  if (!jsonHeader) {
    return null;
  }

  let hierarchy = batchTable.getExtension('3DTILES_batch_table_hierarchy');
  const legacyHierarchy = jsonHeader.HIERARCHY;

  if (legacyHierarchy) {
    console.warn('3D Tile Parser: HIERARCHY is deprecated. Use 3DTILES_batch_table_hierarchy.');
    jsonHeader.extensions = jsonHeader.extensions || {};
    jsonHeader.extensions['3DTILES_batch_table_hierarchy'] = legacyHierarchy;
    hierarchy = legacyHierarchy;
  }

  if (!hierarchy) {
    return null;
  }

  return initializeHierarchyValues(hierarchy, binaryBody);
}

function initializeHierarchyValues(hierarchyJson, binaryBody) {
  let i;
  let classId;
  let binaryAccessor;
  const instancesLength = hierarchyJson.instancesLength;
  const classes = hierarchyJson.classes;
  let classIds = hierarchyJson.classIds;
  let parentCounts = hierarchyJson.parentCounts;
  let parentIds = hierarchyJson.parentIds;
  let parentIdsLength = instancesLength;

  if (defined$1(classIds.byteOffset)) {
    classIds.componentType = defaultValue(classIds.componentType, GL.UNSIGNED_SHORT);
    classIds.type = AttributeType.SCALAR;
    binaryAccessor = getBinaryAccessor(classIds);
    classIds = binaryAccessor.createArrayBufferView(binaryBody.buffer, binaryBody.byteOffset + classIds.byteOffset, instancesLength);
  }

  let parentIndexes;

  if (defined$1(parentCounts)) {
    if (defined$1(parentCounts.byteOffset)) {
      parentCounts.componentType = defaultValue(parentCounts.componentType, GL.UNSIGNED_SHORT);
      parentCounts.type = AttributeType.SCALAR;
      binaryAccessor = getBinaryAccessor(parentCounts);
      parentCounts = binaryAccessor.createArrayBufferView(binaryBody.buffer, binaryBody.byteOffset + parentCounts.byteOffset, instancesLength);
    }

    parentIndexes = new Uint16Array(instancesLength);
    parentIdsLength = 0;

    for (i = 0; i < instancesLength; ++i) {
      parentIndexes[i] = parentIdsLength;
      parentIdsLength += parentCounts[i];
    }
  }

  if (defined$1(parentIds) && defined$1(parentIds.byteOffset)) {
    parentIds.componentType = defaultValue(parentIds.componentType, GL.UNSIGNED_SHORT);
    parentIds.type = AttributeType.SCALAR;
    binaryAccessor = getBinaryAccessor(parentIds);
    parentIds = binaryAccessor.createArrayBufferView(binaryBody.buffer, binaryBody.byteOffset + parentIds.byteOffset, parentIdsLength);
  }

  const classesLength = classes.length;

  for (i = 0; i < classesLength; ++i) {
    const classInstancesLength = classes[i].length;
    const properties = classes[i].instances;
    const binaryProperties = getBinaryProperties(classInstancesLength, properties, binaryBody);
    classes[i].instances = combine(binaryProperties, properties);
  }

  const classCounts = new Array(classesLength).fill(0);
  const classIndexes = new Uint16Array(instancesLength);

  for (i = 0; i < instancesLength; ++i) {
    classId = classIds[i];
    classIndexes[i] = classCounts[classId];
    ++classCounts[classId];
  }

  const hierarchy = {
    classes,
    classIds,
    classIndexes,
    parentCounts,
    parentIndexes,
    parentIds
  };
  validateHierarchy(hierarchy);
  return hierarchy;
}

function traverseHierarchy(hierarchy, instanceIndex, endConditionCallback) {
  if (!hierarchy) {
    return;
  }

  const parentCounts = hierarchy.parentCounts;
  const parentIds = hierarchy.parentIds;

  if (parentIds) {
    return endConditionCallback(hierarchy, instanceIndex);
  }

  if (parentCounts > 0) {
    return traverseHierarchyMultipleParents(hierarchy, instanceIndex, endConditionCallback);
  }

  return traverseHierarchySingleParent(hierarchy, instanceIndex, endConditionCallback);
}

function traverseHierarchyMultipleParents(hierarchy, instanceIndex, endConditionCallback) {
  const classIds = hierarchy.classIds;
  const parentCounts = hierarchy.parentCounts;
  const parentIds = hierarchy.parentIds;
  const parentIndexes = hierarchy.parentIndexes;
  const instancesLength = classIds.length;
  const visited = scratchVisited;
  visited.length = Math.max(visited.length, instancesLength);
  const visitedMarker = ++marker;
  const stack = scratchStack;
  stack.length = 0;
  stack.push(instanceIndex);

  while (stack.length > 0) {
    instanceIndex = stack.pop();

    if (visited[instanceIndex] === visitedMarker) {
      continue;
    }

    visited[instanceIndex] = visitedMarker;
    const result = endConditionCallback(hierarchy, instanceIndex);

    if (defined$1(result)) {
      return result;
    }

    const parentCount = parentCounts[instanceIndex];
    const parentIndex = parentIndexes[instanceIndex];

    for (let i = 0; i < parentCount; ++i) {
      const parentId = parentIds[parentIndex + i];

      if (parentId !== instanceIndex) {
        stack.push(parentId);
      }
    }
  }

  return null;
}

function traverseHierarchySingleParent(hierarchy, instanceIndex, endConditionCallback) {
  let hasParent = true;

  while (hasParent) {
    const result = endConditionCallback(hierarchy, instanceIndex);

    if (defined$1(result)) {
      return result;
    }

    const parentId = hierarchy.parentIds[instanceIndex];
    hasParent = parentId !== instanceIndex;
    instanceIndex = parentId;
  }

  throw new Error('traverseHierarchySingleParent');
}

function validateHierarchy(hierarchy) {
  const classIds = hierarchy.classIds;
  const instancesLength = classIds.length;

  for (let i = 0; i < instancesLength; ++i) {
    validateInstance(hierarchy, i, stack);
  }
}

function validateInstance(hierarchy, instanceIndex, stack) {
  const parentCounts = hierarchy.parentCounts;
  const parentIds = hierarchy.parentIds;
  const parentIndexes = hierarchy.parentIndexes;
  const classIds = hierarchy.classIds;
  const instancesLength = classIds.length;

  if (!defined$1(parentIds)) {
    return;
  }

  assert(instanceIndex < instancesLength, "Parent index ".concat(instanceIndex, " exceeds the total number of instances: ").concat(instancesLength));
  assert(stack.indexOf(instanceIndex) === -1, 'Circular dependency detected in the batch table hierarchy.');
  stack.push(instanceIndex);
  const parentCount = defined$1(parentCounts) ? parentCounts[instanceIndex] : 1;
  const parentIndex = defined$1(parentCounts) ? parentIndexes[instanceIndex] : instanceIndex;

  for (let i = 0; i < parentCount; ++i) {
    const parentId = parentIds[parentIndex + i];

    if (parentId !== instanceIndex) {
      validateInstance(hierarchy, parentId, stack);
    }
  }

  stack.pop(instanceIndex);
}

function defined(x) {
  return x !== undefined && x !== null;
}

const clone = (x, y) => x;

const IGNORED_PROPERTY_FIELDS = {
  HIERARCHY: true,
  extensions: true,
  extras: true
};
class Tile3DBatchTableParser {
  constructor(json, binary, featureCount, options = {}) {
    var _this$json;

    _defineProperty(this, "json", void 0);

    _defineProperty(this, "binary", void 0);

    _defineProperty(this, "featureCount", void 0);

    _defineProperty(this, "_extensions", void 0);

    _defineProperty(this, "_properties", void 0);

    _defineProperty(this, "_binaryProperties", void 0);

    _defineProperty(this, "_hierarchy", void 0);

    assert$7(featureCount >= 0);
    this.json = json || {};
    this.binary = binary;
    this.featureCount = featureCount;
    this._extensions = ((_this$json = this.json) === null || _this$json === void 0 ? void 0 : _this$json.extensions) || {};
    this._properties = {};

    for (const propertyName in this.json) {
      if (!IGNORED_PROPERTY_FIELDS[propertyName]) {
        this._properties[propertyName] = this.json[propertyName];
      }
    }

    this._binaryProperties = this._initializeBinaryProperties();

    if (options['3DTILES_batch_table_hierarchy']) {
      this._hierarchy = initializeHierarchy(this, this.json, this.binary);
    }
  }

  getExtension(extensionName) {
    return this.json && this.json.extensions && this.json.extensions[extensionName];
  }

  memorySizeInBytes() {
    return 0;
  }

  isClass(batchId, className) {
    this._checkBatchId(batchId);

    assert$7(typeof className === 'string', className);

    if (this._hierarchy) {
      const result = traverseHierarchy(this._hierarchy, batchId, (hierarchy, instanceIndex) => {
        const classId = hierarchy.classIds[instanceIndex];
        const instanceClass = hierarchy.classes[classId];
        return instanceClass.name === className;
      });
      return defined(result);
    }

    return false;
  }

  isExactClass(batchId, className) {
    assert$7(typeof className === 'string', className);
    return this.getExactClassName(batchId) === className;
  }

  getExactClassName(batchId) {
    this._checkBatchId(batchId);

    if (this._hierarchy) {
      const classId = this._hierarchy.classIds[batchId];
      const instanceClass = this._hierarchy.classes[classId];
      return instanceClass.name;
    }

    return undefined;
  }

  hasProperty(batchId, name) {
    this._checkBatchId(batchId);

    assert$7(typeof name === 'string', name);
    return defined(this._properties[name]) || this._hasPropertyInHierarchy(batchId, name);
  }

  getPropertyNames(batchId, results) {
    this._checkBatchId(batchId);

    results = defined(results) ? results : [];
    results.length = 0;
    const propertyNames = Object.keys(this._properties);
    results.push(...propertyNames);

    if (this._hierarchy) {
      this._getPropertyNamesInHierarchy(batchId, results);
    }

    return results;
  }

  getProperty(batchId, name) {
    this._checkBatchId(batchId);

    assert$7(typeof name === 'string', name);

    if (this._binaryProperties) {
      const binaryProperty = this._binaryProperties[name];

      if (defined(binaryProperty)) {
        return this._getBinaryProperty(binaryProperty, batchId);
      }
    }

    const propertyValues = this._properties[name];

    if (defined(propertyValues)) {
      return clone(propertyValues[batchId]);
    }

    if (this._hierarchy) {
      const hierarchyProperty = this._getHierarchyProperty(batchId, name);

      if (defined(hierarchyProperty)) {
        return hierarchyProperty;
      }
    }

    return undefined;
  }

  setProperty(batchId, name, value) {
    const featureCount = this.featureCount;

    this._checkBatchId(batchId);

    assert$7(typeof name === 'string', name);

    if (this._binaryProperties) {
      const binaryProperty = this._binaryProperties[name];

      if (binaryProperty) {
        this._setBinaryProperty(binaryProperty, batchId, value);

        return;
      }
    }

    if (this._hierarchy) {
      if (this._setHierarchyProperty(this, batchId, name, value)) {
        return;
      }
    }

    let propertyValues = this._properties[name];

    if (!defined(propertyValues)) {
      this._properties[name] = new Array(featureCount);
      propertyValues = this._properties[name];
    }

    propertyValues[batchId] = clone(value);
  }

  _checkBatchId(batchId) {
    const valid = batchId >= 0 && batchId < this.featureCount;

    if (!valid) {
      throw new Error('batchId not in range [0, featureCount - 1].');
    }
  }

  _getBinaryProperty(binaryProperty, index) {
    return binaryProperty.unpack(binaryProperty.typedArray, index);
  }

  _setBinaryProperty(binaryProperty, index, value) {
    binaryProperty.pack(value, binaryProperty.typedArray, index);
  }

  _initializeBinaryProperties() {
    let binaryProperties = null;

    for (const name in this._properties) {
      const property = this._properties[name];

      const binaryProperty = this._initializeBinaryProperty(name, property);

      if (binaryProperty) {
        binaryProperties = binaryProperties || {};
        binaryProperties[name] = binaryProperty;
      }
    }

    return binaryProperties;
  }

  _initializeBinaryProperty(name, property) {
    if ('byteOffset' in property) {
      const tile3DAccessor = property;
      assert$7(this.binary, "Property ".concat(name, " requires a batch table binary."));
      assert$7(tile3DAccessor.type, "Property ".concat(name, " requires a type."));
      const accessor = createTypedArrayFromAccessor(tile3DAccessor, this.binary.buffer, this.binary.byteOffset | 0, this.featureCount);
      return {
        typedArray: accessor.values,
        componentCount: accessor.size,
        unpack: accessor.unpacker,
        pack: accessor.packer
      };
    }

    return null;
  }

  _hasPropertyInHierarchy(batchId, name) {
    if (!this._hierarchy) {
      return false;
    }

    const result = traverseHierarchy(this._hierarchy, batchId, (hierarchy, instanceIndex) => {
      const classId = hierarchy.classIds[instanceIndex];
      const instances = hierarchy.classes[classId].instances;
      return defined(instances[name]);
    });
    return defined(result);
  }

  _getPropertyNamesInHierarchy(batchId, results) {
    traverseHierarchy(this._hierarchy, batchId, (hierarchy, instanceIndex) => {
      const classId = hierarchy.classIds[instanceIndex];
      const instances = hierarchy.classes[classId].instances;

      for (const name in instances) {
        if (instances.hasOwnProperty(name)) {
          if (results.indexOf(name) === -1) {
            results.push(name);
          }
        }
      }
    });
  }

  _getHierarchyProperty(batchId, name) {
    return traverseHierarchy(this._hierarchy, batchId, (hierarchy, instanceIndex) => {
      const classId = hierarchy.classIds[instanceIndex];
      const instanceClass = hierarchy.classes[classId];
      const indexInClass = hierarchy.classIndexes[instanceIndex];
      const propertyValues = instanceClass.instances[name];

      if (defined(propertyValues)) {
        if (defined(propertyValues.typedArray)) {
          return this._getBinaryProperty(propertyValues, indexInClass);
        }

        return clone(propertyValues[indexInClass]);
      }

      return null;
    });
  }

  _setHierarchyProperty(batchTable, batchId, name, value) {
    const result = traverseHierarchy(this._hierarchy, batchId, (hierarchy, instanceIndex) => {
      const classId = hierarchy.classIds[instanceIndex];
      const instanceClass = hierarchy.classes[classId];
      const indexInClass = hierarchy.classIndexes[instanceIndex];
      const propertyValues = instanceClass.instances[name];

      if (defined(propertyValues)) {
        assert$7(instanceIndex === batchId, "Inherited property \"".concat(name, "\" is read-only."));

        if (defined(propertyValues.typedArray)) {
          this._setBinaryProperty(propertyValues, indexInClass, value);
        } else {
          propertyValues[indexInClass] = clone(value);
        }

        return true;
      }

      return false;
    });
    return defined(result);
  }

}

const SIZEOF_UINT32$1 = 4;
function parse3DTileHeaderSync(tile, arrayBuffer, byteOffset = 0) {
  const view = new DataView(arrayBuffer);
  tile.magic = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32$1;
  tile.version = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32$1;
  tile.byteLength = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32$1;

  if (tile.version !== 1) {
    throw new Error("3D Tile Version ".concat(tile.version, " not supported"));
  }

  return byteOffset;
}

const SIZEOF_UINT32 = 4;
const DEPRECATION_WARNING = 'b3dm tile in legacy format.';
function parse3DTileTablesHeaderSync(tile, arrayBuffer, byteOffset) {
  const view = new DataView(arrayBuffer);
  let batchLength;
  tile.header = tile.header || {};
  let featureTableJsonByteLength = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32;
  let featureTableBinaryByteLength = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32;
  let batchTableJsonByteLength = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32;
  let batchTableBinaryByteLength = view.getUint32(byteOffset, true);
  byteOffset += SIZEOF_UINT32;

  if (batchTableJsonByteLength >= 570425344) {
    byteOffset -= SIZEOF_UINT32 * 2;
    batchLength = featureTableJsonByteLength;
    batchTableJsonByteLength = featureTableBinaryByteLength;
    batchTableBinaryByteLength = 0;
    featureTableJsonByteLength = 0;
    featureTableBinaryByteLength = 0;
    console.warn(DEPRECATION_WARNING);
  } else if (batchTableBinaryByteLength >= 570425344) {
    byteOffset -= SIZEOF_UINT32;
    batchLength = batchTableJsonByteLength;
    batchTableJsonByteLength = featureTableJsonByteLength;
    batchTableBinaryByteLength = featureTableBinaryByteLength;
    featureTableJsonByteLength = 0;
    featureTableBinaryByteLength = 0;
    console.warn(DEPRECATION_WARNING);
  }

  tile.header.featureTableJsonByteLength = featureTableJsonByteLength;
  tile.header.featureTableBinaryByteLength = featureTableBinaryByteLength;
  tile.header.batchTableJsonByteLength = batchTableJsonByteLength;
  tile.header.batchTableBinaryByteLength = batchTableBinaryByteLength;
  tile.header.batchLength = batchLength;
  return byteOffset;
}
function parse3DTileTablesSync(tile, arrayBuffer, byteOffset, options) {
  byteOffset = parse3DTileFeatureTable(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileBatchTable(tile, arrayBuffer, byteOffset);
  return byteOffset;
}

function parse3DTileFeatureTable(tile, arrayBuffer, byteOffset, options) {
  const {
    featureTableJsonByteLength,
    featureTableBinaryByteLength,
    batchLength
  } = tile.header;
  tile.featureTableJson = {
    BATCH_LENGTH: batchLength || 0
  };

  if (featureTableJsonByteLength > 0) {
    const featureTableString = getStringFromArrayBuffer(arrayBuffer, byteOffset, featureTableJsonByteLength);
    tile.featureTableJson = JSON.parse(featureTableString);
  }

  byteOffset += featureTableJsonByteLength;
  tile.featureTableBinary = new Uint8Array(arrayBuffer, byteOffset, featureTableBinaryByteLength);
  byteOffset += featureTableBinaryByteLength;
  return byteOffset;
}

function parse3DTileBatchTable(tile, arrayBuffer, byteOffset, options) {
  const {
    batchTableJsonByteLength,
    batchTableBinaryByteLength
  } = tile.header;

  if (batchTableJsonByteLength > 0) {
    const batchTableString = getStringFromArrayBuffer(arrayBuffer, byteOffset, batchTableJsonByteLength);
    tile.batchTableJson = JSON.parse(batchTableString);
    byteOffset += batchTableJsonByteLength;

    if (batchTableBinaryByteLength > 0) {
      tile.batchTableBinary = new Uint8Array(arrayBuffer, byteOffset, batchTableBinaryByteLength);
      tile.batchTableBinary = new Uint8Array(tile.batchTableBinary);
      byteOffset += batchTableBinaryByteLength;
    }
  }

  return byteOffset;
}

function normalize3DTileColorAttribute(tile, colors, batchTable) {
  if (!colors && (!tile || !tile.batchIds || !batchTable)) {
    return null;
  }

  const {
    batchIds,
    isRGB565,
    pointCount
  } = tile;

  if (batchIds && batchTable) {
    const colorArray = new Uint8ClampedArray(pointCount * 3);

    for (let i = 0; i < pointCount; i++) {
      const batchId = batchIds[i];
      const dimensions = batchTable.getProperty(batchId, 'dimensions');
      const color = dimensions.map(d => d * 255);
      colorArray[i * 3] = color[0];
      colorArray[i * 3 + 1] = color[1];
      colorArray[i * 3 + 2] = color[2];
    }

    return {
      type: GL$1.UNSIGNED_BYTE,
      value: colorArray,
      size: 3,
      normalized: true
    };
  }

  if (isRGB565) {
    const colorArray = new Uint8ClampedArray(pointCount * 3);

    for (let i = 0; i < pointCount; i++) {
      const color = decodeRGB565(colors[i]);
      colorArray[i * 3] = color[0];
      colorArray[i * 3 + 1] = color[1];
      colorArray[i * 3 + 2] = color[2];
    }

    return {
      type: GL$1.UNSIGNED_BYTE,
      value: colorArray,
      size: 3,
      normalized: true
    };
  }

  if (colors && colors.length === pointCount * 3) {
    return {
      type: GL$1.UNSIGNED_BYTE,
      value: colors,
      size: 3,
      normalized: true
    };
  }

  return {
    type: GL$1.UNSIGNED_BYTE,
    value: colors,
    size: 4,
    normalized: true
  };
}

const scratchNormal = new Vector3();
function normalize3DTileNormalAttribute(tile, normals) {
  if (!normals) {
    return null;
  }

  if (tile.isOctEncoded16P) {
    const decodedArray = new Float32Array(tile.pointsLength * 3);

    for (let i = 0; i < tile.pointsLength; i++) {
      octDecode(normals[i * 2], normals[i * 2 + 1], scratchNormal);
      scratchNormal.toArray(decodedArray, i * 3);
    }

    return {
      type: GL$1.FLOAT,
      size: 2,
      value: decodedArray
    };
  }

  return {
    type: GL$1.FLOAT,
    size: 2,
    value: normals
  };
}

function normalize3DTilePositionAttribute(tile, positions, options) {
  if (!tile.isQuantized) {
    return positions;
  }

  if (options['3d-tiles'] && options['3d-tiles'].decodeQuantizedPositions) {
    tile.isQuantized = false;
    return decodeQuantizedPositions(tile, positions);
  }

  return {
    type: GL$1.UNSIGNED_SHORT,
    value: positions,
    size: 3,
    normalized: true
  };
}

function decodeQuantizedPositions(tile, positions) {
  const scratchPosition = new Vector3();
  const decodedArray = new Float32Array(tile.pointCount * 3);

  for (let i = 0; i < tile.pointCount; i++) {
    scratchPosition.set(positions[i * 3], positions[i * 3 + 1], positions[i * 3 + 2]).scale(1 / tile.quantizedRange).multiply(tile.quantizedVolumeScale).add(tile.quantizedVolumeOffset).toArray(decodedArray, i * 3);
  }

  return decodedArray;
}

async function parsePointCloud3DTile(tile, arrayBuffer, byteOffset, options, context) {
  byteOffset = parse3DTileHeaderSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileTablesHeaderSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileTablesSync(tile, arrayBuffer, byteOffset);
  initializeTile(tile);
  const {
    featureTable,
    batchTable
  } = parsePointCloudTables(tile);
  await parseDraco(tile, featureTable, batchTable, options, context);
  parsePositions(tile, featureTable, options);
  parseColors(tile, featureTable, batchTable);
  parseNormals(tile, featureTable);
  return byteOffset;
}

function initializeTile(tile) {
  tile.attributes = {
    positions: null,
    colors: null,
    normals: null,
    batchIds: null
  };
  tile.isQuantized = false;
  tile.isTranslucent = false;
  tile.isRGB565 = false;
  tile.isOctEncoded16P = false;
}

function parsePointCloudTables(tile) {
  const featureTable = new Tile3DFeatureTable(tile.featureTableJson, tile.featureTableBinary);
  const pointsLength = featureTable.getGlobalProperty('POINTS_LENGTH');

  if (!Number.isFinite(pointsLength)) {
    throw new Error('POINTS_LENGTH must be defined');
  }

  featureTable.featuresLength = pointsLength;
  tile.featuresLength = pointsLength;
  tile.pointsLength = pointsLength;
  tile.pointCount = pointsLength;
  tile.rtcCenter = featureTable.getGlobalProperty('RTC_CENTER', GL$1.FLOAT, 3);
  const batchTable = parseBatchIds(tile, featureTable);
  return {
    featureTable,
    batchTable
  };
}

function parsePositions(tile, featureTable, options) {
  if (!tile.attributes.positions) {
    if (featureTable.hasProperty('POSITION')) {
      tile.attributes.positions = featureTable.getPropertyArray('POSITION', GL$1.FLOAT, 3);
    } else if (featureTable.hasProperty('POSITION_QUANTIZED')) {
      const positions = featureTable.getPropertyArray('POSITION_QUANTIZED', GL$1.UNSIGNED_SHORT, 3);
      tile.isQuantized = true;
      tile.quantizedRange = (1 << 16) - 1;
      tile.quantizedVolumeScale = featureTable.getGlobalProperty('QUANTIZED_VOLUME_SCALE', GL$1.FLOAT, 3);

      if (!tile.quantizedVolumeScale) {
        throw new Error('QUANTIZED_VOLUME_SCALE must be defined for quantized positions.');
      }

      tile.quantizedVolumeOffset = featureTable.getGlobalProperty('QUANTIZED_VOLUME_OFFSET', GL$1.FLOAT, 3);

      if (!tile.quantizedVolumeOffset) {
        throw new Error('QUANTIZED_VOLUME_OFFSET must be defined for quantized positions.');
      }

      tile.attributes.positions = normalize3DTilePositionAttribute(tile, positions, options);
    }
  }

  if (!tile.attributes.positions) {
    throw new Error('Either POSITION or POSITION_QUANTIZED must be defined.');
  }
}

function parseColors(tile, featureTable, batchTable) {
  if (!tile.attributes.colors) {
    let colors = null;

    if (featureTable.hasProperty('RGBA')) {
      colors = featureTable.getPropertyArray('RGBA', GL$1.UNSIGNED_BYTE, 4);
      tile.isTranslucent = true;
    } else if (featureTable.hasProperty('RGB')) {
      colors = featureTable.getPropertyArray('RGB', GL$1.UNSIGNED_BYTE, 3);
    } else if (featureTable.hasProperty('RGB565')) {
      colors = featureTable.getPropertyArray('RGB565', GL$1.UNSIGNED_SHORT, 1);
      tile.isRGB565 = true;
    }

    tile.attributes.colors = normalize3DTileColorAttribute(tile, colors, batchTable);
  }

  if (featureTable.hasProperty('CONSTANT_RGBA')) {
    tile.constantRGBA = featureTable.getGlobalProperty('CONSTANT_RGBA', GL$1.UNSIGNED_BYTE, 4);
  }
}

function parseNormals(tile, featureTable) {
  if (!tile.attributes.normals) {
    let normals = null;

    if (featureTable.hasProperty('NORMAL')) {
      normals = featureTable.getPropertyArray('NORMAL', GL$1.FLOAT, 3);
    } else if (featureTable.hasProperty('NORMAL_OCT16P')) {
      normals = featureTable.getPropertyArray('NORMAL_OCT16P', GL$1.UNSIGNED_BYTE, 2);
      tile.isOctEncoded16P = true;
    }

    tile.attributes.normals = normalize3DTileNormalAttribute(tile, normals);
  }
}

function parseBatchIds(tile, featureTable) {
  let batchTable = null;

  if (!tile.batchIds && featureTable.hasProperty('BATCH_ID')) {
    tile.batchIds = featureTable.getPropertyArray('BATCH_ID', GL$1.UNSIGNED_SHORT, 1);

    if (tile.batchIds) {
      const batchFeatureLength = featureTable.getGlobalProperty('BATCH_LENGTH');

      if (!batchFeatureLength) {
        throw new Error('Global property: BATCH_LENGTH must be defined when BATCH_ID is defined.');
      }

      const {
        batchTableJson,
        batchTableBinary
      } = tile;
      batchTable = new Tile3DBatchTableParser(batchTableJson, batchTableBinary, batchFeatureLength);
    }
  }

  return batchTable;
}

async function parseDraco(tile, featureTable, batchTable, options, context) {
  let dracoBuffer;
  let dracoFeatureTableProperties;
  let dracoBatchTableProperties;
  const batchTableDraco = tile.batchTableJson && tile.batchTableJson.extensions && tile.batchTableJson.extensions['3DTILES_draco_point_compression'];

  if (batchTableDraco) {
    dracoBatchTableProperties = batchTableDraco.properties;
  }

  const featureTableDraco = featureTable.getExtension('3DTILES_draco_point_compression');

  if (featureTableDraco) {
    dracoFeatureTableProperties = featureTableDraco.properties;
    const dracoByteOffset = featureTableDraco.byteOffset;
    const dracoByteLength = featureTableDraco.byteLength;

    if (!dracoFeatureTableProperties || !Number.isFinite(dracoByteOffset) || !dracoByteLength) {
      throw new Error('Draco properties, byteOffset, and byteLength must be defined');
    }

    dracoBuffer = tile.featureTableBinary.slice(dracoByteOffset, dracoByteOffset + dracoByteLength);
    tile.hasPositions = Number.isFinite(dracoFeatureTableProperties.POSITION);
    tile.hasColors = Number.isFinite(dracoFeatureTableProperties.RGB) || Number.isFinite(dracoFeatureTableProperties.RGBA);
    tile.hasNormals = Number.isFinite(dracoFeatureTableProperties.NORMAL);
    tile.hasBatchIds = Number.isFinite(dracoFeatureTableProperties.BATCH_ID);
    tile.isTranslucent = Number.isFinite(dracoFeatureTableProperties.RGBA);
  }

  if (!dracoBuffer) {
    return true;
  }

  const dracoData = {
    buffer: dracoBuffer,
    properties: { ...dracoFeatureTableProperties,
      ...dracoBatchTableProperties
    },
    featureTableProperties: dracoFeatureTableProperties,
    batchTableProperties: dracoBatchTableProperties,
    dequantizeInShader: false
  };
  return await loadDraco(tile, dracoData, options, context);
}

async function loadDraco(tile, dracoData, options, context) {
  const {
    parse
  } = context;
  const dracoOptions = { ...options,
    draco: { ...options.draco,
      extraAttributes: dracoData.batchTableProperties || {}
    }
  };
  delete dracoOptions['3d-tiles'];
  const data = await parse(dracoData.buffer, DracoLoader, dracoOptions);
  const decodedPositions = data.attributes.POSITION && data.attributes.POSITION.value;
  const decodedColors = data.attributes.COLOR_0 && data.attributes.COLOR_0.value;
  const decodedNormals = data.attributes.NORMAL && data.attributes.NORMAL.value;
  const decodedBatchIds = data.attributes.BATCH_ID && data.attributes.BATCH_ID.value;
  const isQuantizedDraco = decodedPositions && data.attributes.POSITION.value.quantization;
  const isOctEncodedDraco = decodedNormals && data.attributes.NORMAL.value.quantization;

  if (isQuantizedDraco) {
    const quantization = data.POSITION.data.quantization;
    const range = quantization.range;
    tile.quantizedVolumeScale = new Vector3(range, range, range);
    tile.quantizedVolumeOffset = new Vector3(quantization.minValues);
    tile.quantizedRange = (1 << quantization.quantizationBits) - 1.0;
    tile.isQuantizedDraco = true;
  }

  if (isOctEncodedDraco) {
    tile.octEncodedRange = (1 << data.NORMAL.data.quantization.quantizationBits) - 1.0;
    tile.isOctEncodedDraco = true;
  }

  const batchTableAttributes = {};

  if (dracoData.batchTableProperties) {
    for (const attributeName of Object.keys(dracoData.batchTableProperties)) {
      if (data.attributes[attributeName] && data.attributes[attributeName].value) {
        batchTableAttributes[attributeName.toLowerCase()] = data.attributes[attributeName].value;
      }
    }
  }

  tile.attributes = {
    positions: decodedPositions,
    colors: normalize3DTileColorAttribute(tile, decodedColors, undefined),
    normals: decodedNormals,
    batchIds: decodedBatchIds,
    ...batchTableAttributes
  };
}

const VERSION$3 = "3.2.12" ;

const VERSION$2 = "3.2.12" ;

const VERSION$1 = "3.2.12" ;
const BASIS_CDN_ENCODER_WASM = "https://unpkg.com/@loaders.gl/textures@".concat(VERSION$1, "/dist/libs/basis_encoder.wasm");
const BASIS_CDN_ENCODER_JS = "https://unpkg.com/@loaders.gl/textures@".concat(VERSION$1, "/dist/libs/basis_encoder.js");
let loadBasisTranscoderPromise;
async function loadBasisTrascoderModule(options) {
  const modules = options.modules || {};

  if (modules.basis) {
    return modules.basis;
  }

  loadBasisTranscoderPromise = loadBasisTranscoderPromise || loadBasisTrascoder(options);
  return await loadBasisTranscoderPromise;
}

async function loadBasisTrascoder(options) {
  let BASIS = null;
  let wasmBinary = null;
  [BASIS, wasmBinary] = await Promise.all([await loadLibrary('basis_transcoder.js', 'textures', options), await loadLibrary('basis_transcoder.wasm', 'textures', options)]);
  BASIS = BASIS || globalThis.BASIS;
  return await initializeBasisTrascoderModule(BASIS, wasmBinary);
}

function initializeBasisTrascoderModule(BasisModule, wasmBinary) {
  const options = {};

  if (wasmBinary) {
    options.wasmBinary = wasmBinary;
  }

  return new Promise(resolve => {
    BasisModule(options).then(module => {
      const {
        BasisFile,
        initializeBasis
      } = module;
      initializeBasis();
      resolve({
        BasisFile
      });
    });
  });
}

let loadBasisEncoderPromise;
async function loadBasisEncoderModule(options) {
  const modules = options.modules || {};

  if (modules.basisEncoder) {
    return modules.basisEncoder;
  }

  loadBasisEncoderPromise = loadBasisEncoderPromise || loadBasisEncoder(options);
  return await loadBasisEncoderPromise;
}

async function loadBasisEncoder(options) {
  let BASIS_ENCODER = null;
  let wasmBinary = null;
  [BASIS_ENCODER, wasmBinary] = await Promise.all([await loadLibrary(BASIS_CDN_ENCODER_JS, 'textures', options), await loadLibrary(BASIS_CDN_ENCODER_WASM, 'textures', options)]);
  BASIS_ENCODER = BASIS_ENCODER || globalThis.BASIS;
  return await initializeBasisEncoderModule(BASIS_ENCODER, wasmBinary);
}

function initializeBasisEncoderModule(BasisEncoderModule, wasmBinary) {
  const options = {};

  if (wasmBinary) {
    options.wasmBinary = wasmBinary;
  }

  return new Promise(resolve => {
    BasisEncoderModule(options).then(module => {
      const {
        BasisFile,
        KTX2File,
        initializeBasis,
        BasisEncoder
      } = module;
      initializeBasis();
      resolve({
        BasisFile,
        KTX2File,
        BasisEncoder
      });
    });
  });
}

const GL_EXTENSIONS_CONSTANTS = {
  COMPRESSED_RGB_S3TC_DXT1_EXT: 0x83f0,
  COMPRESSED_RGBA_S3TC_DXT1_EXT: 0x83f1,
  COMPRESSED_RGBA_S3TC_DXT3_EXT: 0x83f2,
  COMPRESSED_RGBA_S3TC_DXT5_EXT: 0x83f3,
  COMPRESSED_R11_EAC: 0x9270,
  COMPRESSED_SIGNED_R11_EAC: 0x9271,
  COMPRESSED_RG11_EAC: 0x9272,
  COMPRESSED_SIGNED_RG11_EAC: 0x9273,
  COMPRESSED_RGB8_ETC2: 0x9274,
  COMPRESSED_RGBA8_ETC2_EAC: 0x9275,
  COMPRESSED_SRGB8_ETC2: 0x9276,
  COMPRESSED_SRGB8_ALPHA8_ETC2_EAC: 0x9277,
  COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2: 0x9278,
  COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2: 0x9279,
  COMPRESSED_RGB_PVRTC_4BPPV1_IMG: 0x8c00,
  COMPRESSED_RGBA_PVRTC_4BPPV1_IMG: 0x8c02,
  COMPRESSED_RGB_PVRTC_2BPPV1_IMG: 0x8c01,
  COMPRESSED_RGBA_PVRTC_2BPPV1_IMG: 0x8c03,
  COMPRESSED_RGB_ETC1_WEBGL: 0x8d64,
  COMPRESSED_RGB_ATC_WEBGL: 0x8c92,
  COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL: 0x8c93,
  COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL: 0x87ee,
  COMPRESSED_RGBA_ASTC_4X4_KHR: 0x93b0,
  COMPRESSED_RGBA_ASTC_5X4_KHR: 0x93b1,
  COMPRESSED_RGBA_ASTC_5X5_KHR: 0x93b2,
  COMPRESSED_RGBA_ASTC_6X5_KHR: 0x93b3,
  COMPRESSED_RGBA_ASTC_6X6_KHR: 0x93b4,
  COMPRESSED_RGBA_ASTC_8X5_KHR: 0x93b5,
  COMPRESSED_RGBA_ASTC_8X6_KHR: 0x93b6,
  COMPRESSED_RGBA_ASTC_8X8_KHR: 0x93b7,
  COMPRESSED_RGBA_ASTC_10X5_KHR: 0x93b8,
  COMPRESSED_RGBA_ASTC_10X6_KHR: 0x93b9,
  COMPRESSED_RGBA_ASTC_10X8_KHR: 0x93ba,
  COMPRESSED_RGBA_ASTC_10X10_KHR: 0x93bb,
  COMPRESSED_RGBA_ASTC_12X10_KHR: 0x93bc,
  COMPRESSED_RGBA_ASTC_12X12_KHR: 0x93bd,
  COMPRESSED_SRGB8_ALPHA8_ASTC_4X4_KHR: 0x93d0,
  COMPRESSED_SRGB8_ALPHA8_ASTC_5X4_KHR: 0x93d1,
  COMPRESSED_SRGB8_ALPHA8_ASTC_5X5_KHR: 0x93d2,
  COMPRESSED_SRGB8_ALPHA8_ASTC_6X5_KHR: 0x93d3,
  COMPRESSED_SRGB8_ALPHA8_ASTC_6X6_KHR: 0x93d4,
  COMPRESSED_SRGB8_ALPHA8_ASTC_8X5_KHR: 0x93d5,
  COMPRESSED_SRGB8_ALPHA8_ASTC_8X6_KHR: 0x93d6,
  COMPRESSED_SRGB8_ALPHA8_ASTC_8X8_KHR: 0x93d7,
  COMPRESSED_SRGB8_ALPHA8_ASTC_10X5_KHR: 0x93d8,
  COMPRESSED_SRGB8_ALPHA8_ASTC_10X6_KHR: 0x93d9,
  COMPRESSED_SRGB8_ALPHA8_ASTC_10X8_KHR: 0x93da,
  COMPRESSED_SRGB8_ALPHA8_ASTC_10X10_KHR: 0x93db,
  COMPRESSED_SRGB8_ALPHA8_ASTC_12X10_KHR: 0x93dc,
  COMPRESSED_SRGB8_ALPHA8_ASTC_12X12_KHR: 0x93dd,
  COMPRESSED_RED_RGTC1_EXT: 0x8dbb,
  COMPRESSED_SIGNED_RED_RGTC1_EXT: 0x8dbc,
  COMPRESSED_RED_GREEN_RGTC2_EXT: 0x8dbd,
  COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT: 0x8dbe,
  COMPRESSED_SRGB_S3TC_DXT1_EXT: 0x8c4c,
  COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: 0x8c4d,
  COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: 0x8c4e,
  COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: 0x8c4f
};

const BROWSER_PREFIXES = ['', 'WEBKIT_', 'MOZ_'];
const WEBGL_EXTENSIONS = {
  WEBGL_compressed_texture_s3tc: 'dxt',
  WEBGL_compressed_texture_s3tc_srgb: 'dxt-srgb',
  WEBGL_compressed_texture_etc1: 'etc1',
  WEBGL_compressed_texture_etc: 'etc2',
  WEBGL_compressed_texture_pvrtc: 'pvrtc',
  WEBGL_compressed_texture_atc: 'atc',
  WEBGL_compressed_texture_astc: 'astc',
  EXT_texture_compression_rgtc: 'rgtc'
};
let formats = null;
function getSupportedGPUTextureFormats(gl) {
  if (!formats) {
    gl = gl || getWebGLContext() || undefined;
    formats = new Set();

    for (const prefix of BROWSER_PREFIXES) {
      for (const extension in WEBGL_EXTENSIONS) {
        if (gl && gl.getExtension("".concat(prefix).concat(extension))) {
          const gpuTextureFormat = WEBGL_EXTENSIONS[extension];
          formats.add(gpuTextureFormat);
        }
      }
    }
  }

  return formats;
}

function getWebGLContext() {
  try {
    const canvas = document.createElement('canvas');
    return canvas.getContext('webgl');
  } catch (error) {
    return null;
  }
}

var n,i,s,a,r,o,l,f;!function(t){t[t.NONE=0]="NONE",t[t.BASISLZ=1]="BASISLZ",t[t.ZSTD=2]="ZSTD",t[t.ZLIB=3]="ZLIB";}(n||(n={})),function(t){t[t.BASICFORMAT=0]="BASICFORMAT";}(i||(i={})),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.ETC1S=163]="ETC1S",t[t.UASTC=166]="UASTC";}(s||(s={})),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.SRGB=1]="SRGB";}(a||(a={})),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.LINEAR=1]="LINEAR",t[t.SRGB=2]="SRGB",t[t.ITU=3]="ITU",t[t.NTSC=4]="NTSC",t[t.SLOG=5]="SLOG",t[t.SLOG2=6]="SLOG2";}(r||(r={})),function(t){t[t.ALPHA_STRAIGHT=0]="ALPHA_STRAIGHT",t[t.ALPHA_PREMULTIPLIED=1]="ALPHA_PREMULTIPLIED";}(o||(o={})),function(t){t[t.RGB=0]="RGB",t[t.RRR=3]="RRR",t[t.GGG=4]="GGG",t[t.AAA=15]="AAA";}(l||(l={})),function(t){t[t.RGB=0]="RGB",t[t.RGBA=3]="RGBA",t[t.RRR=4]="RRR",t[t.RRRG=5]="RRRG";}(f||(f={}));

const KTX2_ID = [0xab, 0x4b, 0x54, 0x58, 0x20, 0x32, 0x30, 0xbb, 0x0d, 0x0a, 0x1a, 0x0a];
function isKTX(data) {
  const id = new Uint8Array(data);
  const notKTX = id.byteLength < KTX2_ID.length || id[0] !== KTX2_ID[0] || id[1] !== KTX2_ID[1] || id[2] !== KTX2_ID[2] || id[3] !== KTX2_ID[3] || id[4] !== KTX2_ID[4] || id[5] !== KTX2_ID[5] || id[6] !== KTX2_ID[6] || id[7] !== KTX2_ID[7] || id[8] !== KTX2_ID[8] || id[9] !== KTX2_ID[9] || id[10] !== KTX2_ID[10] || id[11] !== KTX2_ID[11];
  return !notKTX;
}

const OutputFormat = {
  etc1: {
    basisFormat: 0,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGB_ETC1_WEBGL
  },
  etc2: {
    basisFormat: 1,
    compressed: true
  },
  bc1: {
    basisFormat: 2,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGB_S3TC_DXT1_EXT
  },
  bc3: {
    basisFormat: 3,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGBA_S3TC_DXT5_EXT
  },
  bc4: {
    basisFormat: 4,
    compressed: true
  },
  bc5: {
    basisFormat: 5,
    compressed: true
  },
  'bc7-m6-opaque-only': {
    basisFormat: 6,
    compressed: true
  },
  'bc7-m5': {
    basisFormat: 7,
    compressed: true
  },
  'pvrtc1-4-rgb': {
    basisFormat: 8,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGB_PVRTC_4BPPV1_IMG
  },
  'pvrtc1-4-rgba': {
    basisFormat: 9,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
  },
  'astc-4x4': {
    basisFormat: 10,
    compressed: true,
    format: GL_EXTENSIONS_CONSTANTS.COMPRESSED_RGBA_ASTC_4X4_KHR
  },
  'atc-rgb': {
    basisFormat: 11,
    compressed: true
  },
  'atc-rgba-interpolated-alpha': {
    basisFormat: 12,
    compressed: true
  },
  rgba32: {
    basisFormat: 13,
    compressed: false
  },
  rgb565: {
    basisFormat: 14,
    compressed: false
  },
  bgr565: {
    basisFormat: 15,
    compressed: false
  },
  rgba4444: {
    basisFormat: 16,
    compressed: false
  }
};
async function parseBasis(data, options) {
  if (options.basis.containerFormat === 'auto') {
    if (isKTX(data)) {
      const fileConstructors = await loadBasisEncoderModule(options);
      return parseKTX2File(fileConstructors.KTX2File, data, options);
    }

    const {
      BasisFile
    } = await loadBasisTrascoderModule(options);
    return parseBasisFile(BasisFile, data, options);
  }

  switch (options.basis.module) {
    case 'encoder':
      const fileConstructors = await loadBasisEncoderModule(options);

      switch (options.basis.containerFormat) {
        case 'ktx2':
          return parseKTX2File(fileConstructors.KTX2File, data, options);

        case 'basis':
        default:
          return parseBasisFile(fileConstructors.BasisFile, data, options);
      }

    case 'transcoder':
    default:
      const {
        BasisFile
      } = await loadBasisTrascoderModule(options);
      return parseBasisFile(BasisFile, data, options);
  }
}

function parseBasisFile(BasisFile, data, options) {
  const basisFile = new BasisFile(new Uint8Array(data));

  try {
    if (!basisFile.startTranscoding()) {
      throw new Error('Failed to start basis transcoding');
    }

    const imageCount = basisFile.getNumImages();
    const images = [];

    for (let imageIndex = 0; imageIndex < imageCount; imageIndex++) {
      const levelsCount = basisFile.getNumLevels(imageIndex);
      const levels = [];

      for (let levelIndex = 0; levelIndex < levelsCount; levelIndex++) {
        levels.push(transcodeImage(basisFile, imageIndex, levelIndex, options));
      }

      images.push(levels);
    }

    return images;
  } finally {
    basisFile.close();
    basisFile.delete();
  }
}

function transcodeImage(basisFile, imageIndex, levelIndex, options) {
  const width = basisFile.getImageWidth(imageIndex, levelIndex);
  const height = basisFile.getImageHeight(imageIndex, levelIndex);
  const hasAlpha = basisFile.getHasAlpha();
  const {
    compressed,
    format,
    basisFormat
  } = getBasisOptions(options, hasAlpha);
  const decodedSize = basisFile.getImageTranscodedSizeInBytes(imageIndex, levelIndex, basisFormat);
  const decodedData = new Uint8Array(decodedSize);

  if (!basisFile.transcodeImage(decodedData, imageIndex, levelIndex, basisFormat, 0, 0)) {
    throw new Error('failed to start Basis transcoding');
  }

  return {
    width,
    height,
    data: decodedData,
    compressed,
    format,
    hasAlpha
  };
}

function parseKTX2File(KTX2File, data, options) {
  const ktx2File = new KTX2File(new Uint8Array(data));

  try {
    if (!ktx2File.startTranscoding()) {
      throw new Error('failed to start KTX2 transcoding');
    }

    const levelsCount = ktx2File.getLevels();
    const levels = [];

    for (let levelIndex = 0; levelIndex < levelsCount; levelIndex++) {
      levels.push(transcodeKTX2Image(ktx2File, levelIndex, options));
      break;
    }

    return [levels];
  } finally {
    ktx2File.close();
    ktx2File.delete();
  }
}

function transcodeKTX2Image(ktx2File, levelIndex, options) {
  const {
    alphaFlag,
    height,
    width
  } = ktx2File.getImageLevelInfo(levelIndex, 0, 0);
  const {
    compressed,
    format,
    basisFormat
  } = getBasisOptions(options, alphaFlag);
  const decodedSize = ktx2File.getImageTranscodedSizeInBytes(levelIndex, 0, 0, basisFormat);
  const decodedData = new Uint8Array(decodedSize);

  if (!ktx2File.transcodeImage(decodedData, levelIndex, 0, 0, basisFormat, 0, -1, -1)) {
    throw new Error('Failed to transcode KTX2 image');
  }

  return {
    width,
    height,
    data: decodedData,
    compressed,
    hasAlpha: alphaFlag,
    format
  };
}

function getBasisOptions(options, hasAlpha) {
  let format = options && options.basis && options.basis.format;

  if (format === 'auto') {
    format = selectSupportedBasisFormat();
  }

  if (typeof format === 'object') {
    format = hasAlpha ? format.alpha : format.noAlpha;
  }

  format = format.toLowerCase();
  return OutputFormat[format];
}

function selectSupportedBasisFormat() {
  const supportedFormats = getSupportedGPUTextureFormats();

  if (supportedFormats.has('astc')) {
    return 'astc-4x4';
  } else if (supportedFormats.has('dxt')) {
    return {
      alpha: 'bc3',
      noAlpha: 'bc1'
    };
  } else if (supportedFormats.has('pvrtc')) {
    return {
      alpha: 'pvrtc1-4-rgba',
      noAlpha: 'pvrtc1-4-rgb'
    };
  } else if (supportedFormats.has('etc1')) {
    return 'etc1';
  } else if (supportedFormats.has('etc2')) {
    return 'etc2';
  }

  return 'rgb565';
}

const BasisWorkerLoader = {
  name: 'Basis',
  id: 'basis',
  module: 'textures',
  version: VERSION$2,
  worker: true,
  extensions: ['basis', 'ktx2'],
  mimeTypes: ['application/octet-stream', 'image/ktx2'],
  tests: ['sB'],
  binary: true,
  options: {
    basis: {
      format: 'auto',
      libraryPath: 'libs/',
      containerFormat: 'auto',
      module: 'transcoder'
    }
  }
};
const BasisLoader = { ...BasisWorkerLoader,
  parse: parseBasis
};

const VERSION = "3.2.12" ;

const {
  _parseImageNode
} = globalThis;
const IMAGE_SUPPORTED = typeof Image !== 'undefined';
const IMAGE_BITMAP_SUPPORTED = typeof ImageBitmap !== 'undefined';
const NODE_IMAGE_SUPPORTED = Boolean(_parseImageNode);
const DATA_SUPPORTED = isBrowser$2 ? true : NODE_IMAGE_SUPPORTED;
function isImageTypeSupported(type) {
  switch (type) {
    case 'auto':
      return IMAGE_BITMAP_SUPPORTED || IMAGE_SUPPORTED || DATA_SUPPORTED;

    case 'imagebitmap':
      return IMAGE_BITMAP_SUPPORTED;

    case 'image':
      return IMAGE_SUPPORTED;

    case 'data':
      return DATA_SUPPORTED;

    default:
      throw new Error("@loaders.gl/images: image ".concat(type, " not supported in this environment"));
  }
}
function getDefaultImageType() {
  if (IMAGE_BITMAP_SUPPORTED) {
    return 'imagebitmap';
  }

  if (IMAGE_SUPPORTED) {
    return 'image';
  }

  if (DATA_SUPPORTED) {
    return 'data';
  }

  throw new Error('Install \'@loaders.gl/polyfills\' to parse images under Node.js');
}

function getImageType(image) {
  const format = getImageTypeOrNull(image);

  if (!format) {
    throw new Error('Not an image');
  }

  return format;
}
function getImageData(image) {
  switch (getImageType(image)) {
    case 'data':
      return image;

    case 'image':
    case 'imagebitmap':
      const canvas = document.createElement('canvas');
      const context = canvas.getContext('2d');

      if (!context) {
        throw new Error('getImageData');
      }

      canvas.width = image.width;
      canvas.height = image.height;
      context.drawImage(image, 0, 0);
      return context.getImageData(0, 0, image.width, image.height);

    default:
      throw new Error('getImageData');
  }
}

function getImageTypeOrNull(image) {
  if (typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
    return 'imagebitmap';
  }

  if (typeof Image !== 'undefined' && image instanceof Image) {
    return 'image';
  }

  if (image && typeof image === 'object' && image.data && image.width && image.height) {
    return 'data';
  }

  return null;
}

const SVG_DATA_URL_PATTERN = /^data:image\/svg\+xml/;
const SVG_URL_PATTERN = /\.svg((\?|#).*)?$/;
function isSVG(url) {
  return url && (SVG_DATA_URL_PATTERN.test(url) || SVG_URL_PATTERN.test(url));
}
function getBlobOrSVGDataUrl(arrayBuffer, url) {
  if (isSVG(url)) {
    const textDecoder = new TextDecoder();
    let xmlText = textDecoder.decode(arrayBuffer);

    try {
      if (typeof unescape === 'function' && typeof encodeURIComponent === 'function') {
        xmlText = unescape(encodeURIComponent(xmlText));
      }
    } catch (error) {
      throw new Error(error.message);
    }

    const src = "data:image/svg+xml;base64,".concat(btoa(xmlText));
    return src;
  }

  return getBlob(arrayBuffer, url);
}
function getBlob(arrayBuffer, url) {
  if (isSVG(url)) {
    throw new Error('SVG cannot be parsed directly to imagebitmap');
  }

  return new Blob([new Uint8Array(arrayBuffer)]);
}

async function parseToImage(arrayBuffer, options, url) {
  const blobOrDataUrl = getBlobOrSVGDataUrl(arrayBuffer, url);
  const URL = self.URL || self.webkitURL;
  const objectUrl = typeof blobOrDataUrl !== 'string' && URL.createObjectURL(blobOrDataUrl);

  try {
    return await loadToImage(objectUrl || blobOrDataUrl, options);
  } finally {
    if (objectUrl) {
      URL.revokeObjectURL(objectUrl);
    }
  }
}
async function loadToImage(url, options) {
  const image = new Image();
  image.src = url;

  if (options.image && options.image.decode && image.decode) {
    await image.decode();
    return image;
  }

  return await new Promise((resolve, reject) => {
    try {
      image.onload = () => resolve(image);

      image.onerror = err => reject(new Error("Could not load image ".concat(url, ": ").concat(err)));
    } catch (error) {
      reject(error);
    }
  });
}

const EMPTY_OBJECT = {};
let imagebitmapOptionsSupported = true;
async function parseToImageBitmap(arrayBuffer, options, url) {
  let blob;

  if (isSVG(url)) {
    const image = await parseToImage(arrayBuffer, options, url);
    blob = image;
  } else {
    blob = getBlob(arrayBuffer, url);
  }

  const imagebitmapOptions = options && options.imagebitmap;
  return await safeCreateImageBitmap(blob, imagebitmapOptions);
}

async function safeCreateImageBitmap(blob, imagebitmapOptions = null) {
  if (isEmptyObject(imagebitmapOptions) || !imagebitmapOptionsSupported) {
    imagebitmapOptions = null;
  }

  if (imagebitmapOptions) {
    try {
      return await createImageBitmap(blob, imagebitmapOptions);
    } catch (error) {
      console.warn(error);
      imagebitmapOptionsSupported = false;
    }
  }

  return await createImageBitmap(blob);
}

function isEmptyObject(object) {
  for (const key in object || EMPTY_OBJECT) {
    return false;
  }

  return true;
}

const BIG_ENDIAN = false;
const LITTLE_ENDIAN = true;
function getBinaryImageMetadata(binaryData) {
  const dataView = toDataView(binaryData);
  return getPngMetadata(dataView) || getJpegMetadata(dataView) || getGifMetadata(dataView) || getBmpMetadata(dataView);
}

function getPngMetadata(binaryData) {
  const dataView = toDataView(binaryData);
  const isPng = dataView.byteLength >= 24 && dataView.getUint32(0, BIG_ENDIAN) === 0x89504e47;

  if (!isPng) {
    return null;
  }

  return {
    mimeType: 'image/png',
    width: dataView.getUint32(16, BIG_ENDIAN),
    height: dataView.getUint32(20, BIG_ENDIAN)
  };
}

function getGifMetadata(binaryData) {
  const dataView = toDataView(binaryData);
  const isGif = dataView.byteLength >= 10 && dataView.getUint32(0, BIG_ENDIAN) === 0x47494638;

  if (!isGif) {
    return null;
  }

  return {
    mimeType: 'image/gif',
    width: dataView.getUint16(6, LITTLE_ENDIAN),
    height: dataView.getUint16(8, LITTLE_ENDIAN)
  };
}

function getBmpMetadata(binaryData) {
  const dataView = toDataView(binaryData);
  const isBmp = dataView.byteLength >= 14 && dataView.getUint16(0, BIG_ENDIAN) === 0x424d && dataView.getUint32(2, LITTLE_ENDIAN) === dataView.byteLength;

  if (!isBmp) {
    return null;
  }

  return {
    mimeType: 'image/bmp',
    width: dataView.getUint32(18, LITTLE_ENDIAN),
    height: dataView.getUint32(22, LITTLE_ENDIAN)
  };
}

function getJpegMetadata(binaryData) {
  const dataView = toDataView(binaryData);
  const isJpeg = dataView.byteLength >= 3 && dataView.getUint16(0, BIG_ENDIAN) === 0xffd8 && dataView.getUint8(2) === 0xff;

  if (!isJpeg) {
    return null;
  }

  const {
    tableMarkers,
    sofMarkers
  } = getJpegMarkers();
  let i = 2;

  while (i + 9 < dataView.byteLength) {
    const marker = dataView.getUint16(i, BIG_ENDIAN);

    if (sofMarkers.has(marker)) {
      return {
        mimeType: 'image/jpeg',
        height: dataView.getUint16(i + 5, BIG_ENDIAN),
        width: dataView.getUint16(i + 7, BIG_ENDIAN)
      };
    }

    if (!tableMarkers.has(marker)) {
      return null;
    }

    i += 2;
    i += dataView.getUint16(i, BIG_ENDIAN);
  }

  return null;
}

function getJpegMarkers() {
  const tableMarkers = new Set([0xffdb, 0xffc4, 0xffcc, 0xffdd, 0xfffe]);

  for (let i = 0xffe0; i < 0xfff0; ++i) {
    tableMarkers.add(i);
  }

  const sofMarkers = new Set([0xffc0, 0xffc1, 0xffc2, 0xffc3, 0xffc5, 0xffc6, 0xffc7, 0xffc9, 0xffca, 0xffcb, 0xffcd, 0xffce, 0xffcf, 0xffde]);
  return {
    tableMarkers,
    sofMarkers
  };
}

function toDataView(data) {
  if (data instanceof DataView) {
    return data;
  }

  if (ArrayBuffer.isView(data)) {
    return new DataView(data.buffer);
  }

  if (data instanceof ArrayBuffer) {
    return new DataView(data);
  }

  throw new Error('toDataView');
}

async function parseToNodeImage(arrayBuffer, options) {
  const {
    mimeType
  } = getBinaryImageMetadata(arrayBuffer) || {};
  const _parseImageNode = globalThis._parseImageNode;
  assert$7(_parseImageNode);
  return await _parseImageNode(arrayBuffer, mimeType);
}

async function parseImage(arrayBuffer, options, context) {
  options = options || {};
  const imageOptions = options.image || {};
  const imageType = imageOptions.type || 'auto';
  const {
    url
  } = context || {};
  const loadType = getLoadableImageType(imageType);
  let image;

  switch (loadType) {
    case 'imagebitmap':
      image = await parseToImageBitmap(arrayBuffer, options, url);
      break;

    case 'image':
      image = await parseToImage(arrayBuffer, options, url);
      break;

    case 'data':
      image = await parseToNodeImage(arrayBuffer);
      break;

    default:
      assert$7(false);
  }

  if (imageType === 'data') {
    image = getImageData(image);
  }

  return image;
}

function getLoadableImageType(type) {
  switch (type) {
    case 'auto':
    case 'data':
      return getDefaultImageType();

    default:
      isImageTypeSupported(type);
      return type;
  }
}

const EXTENSIONS$2 = ['png', 'jpg', 'jpeg', 'gif', 'webp', 'bmp', 'ico', 'svg'];
const MIME_TYPES = ['image/png', 'image/jpeg', 'image/gif', 'image/webp', 'image/bmp', 'image/vnd.microsoft.icon', 'image/svg+xml'];
const DEFAULT_IMAGE_LOADER_OPTIONS = {
  image: {
    type: 'auto',
    decode: true
  }
};
const ImageLoader = {
  id: 'image',
  module: 'images',
  name: 'Images',
  version: VERSION,
  mimeTypes: MIME_TYPES,
  extensions: EXTENSIONS$2,
  parse: parseImage,
  tests: [arrayBuffer => Boolean(getBinaryImageMetadata(new DataView(arrayBuffer)))],
  options: DEFAULT_IMAGE_LOADER_OPTIONS
};

const NODE_FORMAT_SUPPORT = ['image/png', 'image/jpeg', 'image/gif'];
const mimeTypeSupported = {};
function _isImageFormatSupported(mimeType) {
  if (mimeTypeSupported[mimeType] === undefined) {
    mimeTypeSupported[mimeType] = checkFormatSupport(mimeType);
  }

  return mimeTypeSupported[mimeType];
}

function checkFormatSupport(mimeType) {
  switch (mimeType) {
    case 'image/webp':
      return checkWebPSupport();

    case 'image/svg':
      return isBrowser$2;

    default:
      if (!isBrowser$2) {
        const {
          _parseImageNode
        } = globalThis;
        return Boolean(_parseImageNode) && NODE_FORMAT_SUPPORT.includes(mimeType);
      }

      return true;
  }
}

function checkWebPSupport() {
  if (!isBrowser$2) {
    return false;
  }

  try {
    const element = document.createElement('canvas');
    return element.toDataURL('image/webp').indexOf('data:image/webp') === 0;
  } catch {
    return false;
  }
}

function assert$1(condition, message) {
  if (!condition) {
    throw new Error(message || 'assert failed: gltf');
  }
}

function resolveUrl(url, options) {
  const absolute = url.startsWith('data:') || url.startsWith('http:') || url.startsWith('https:');

  if (absolute) {
    return url;
  }

  const baseUrl = options.baseUri || options.uri;

  if (!baseUrl) {
    throw new Error("'baseUri' must be provided to resolve relative url ".concat(url));
  }

  return baseUrl.substr(0, baseUrl.lastIndexOf('/') + 1) + url;
}

function getTypedArrayForBufferView(json, buffers, bufferViewIndex) {
  const bufferView = json.bufferViews[bufferViewIndex];
  assert$1(bufferView);
  const bufferIndex = bufferView.buffer;
  const binChunk = buffers[bufferIndex];
  assert$1(binChunk);
  const byteOffset = (bufferView.byteOffset || 0) + binChunk.byteOffset;
  return new Uint8Array(binChunk.arrayBuffer, byteOffset, bufferView.byteLength);
}

const TYPES = ['SCALAR', 'VEC2', 'VEC3', 'VEC4'];
const ARRAY_CONSTRUCTOR_TO_WEBGL_CONSTANT = [[Int8Array, 5120], [Uint8Array, 5121], [Int16Array, 5122], [Uint16Array, 5123], [Uint32Array, 5125], [Float32Array, 5126], [Float64Array, 5130]];
const ARRAY_TO_COMPONENT_TYPE = new Map(ARRAY_CONSTRUCTOR_TO_WEBGL_CONSTANT);
const ATTRIBUTE_TYPE_TO_COMPONENTS = {
  SCALAR: 1,
  VEC2: 2,
  VEC3: 3,
  VEC4: 4,
  MAT2: 4,
  MAT3: 9,
  MAT4: 16
};
const ATTRIBUTE_COMPONENT_TYPE_TO_BYTE_SIZE = {
  5120: 1,
  5121: 1,
  5122: 2,
  5123: 2,
  5125: 4,
  5126: 4
};
const ATTRIBUTE_COMPONENT_TYPE_TO_ARRAY = {
  5120: Int8Array,
  5121: Uint8Array,
  5122: Int16Array,
  5123: Uint16Array,
  5125: Uint32Array,
  5126: Float32Array
};
function getAccessorTypeFromSize(size) {
  const type = TYPES[size - 1];
  return type || TYPES[0];
}
function getComponentTypeFromArray(typedArray) {
  const componentType = ARRAY_TO_COMPONENT_TYPE.get(typedArray.constructor);

  if (!componentType) {
    throw new Error('Illegal typed array');
  }

  return componentType;
}
function getAccessorArrayTypeAndLength(accessor, bufferView) {
  const ArrayType = ATTRIBUTE_COMPONENT_TYPE_TO_ARRAY[accessor.componentType];
  const components = ATTRIBUTE_TYPE_TO_COMPONENTS[accessor.type];
  const bytesPerComponent = ATTRIBUTE_COMPONENT_TYPE_TO_BYTE_SIZE[accessor.componentType];
  const length = accessor.count * components;
  const byteLength = accessor.count * components * bytesPerComponent;
  assert$1(byteLength >= 0 && byteLength <= bufferView.byteLength);
  return {
    ArrayType,
    length,
    byteLength
  };
}

const DEFAULT_GLTF_JSON = {
  asset: {
    version: '2.0',
    generator: 'loaders.gl'
  },
  buffers: []
};
class GLTFScenegraph {
  constructor(gltf) {
    _defineProperty(this, "gltf", void 0);

    _defineProperty(this, "sourceBuffers", void 0);

    _defineProperty(this, "byteLength", void 0);

    this.gltf = gltf || {
      json: { ...DEFAULT_GLTF_JSON
      },
      buffers: []
    };
    this.sourceBuffers = [];
    this.byteLength = 0;

    if (this.gltf.buffers && this.gltf.buffers[0]) {
      this.byteLength = this.gltf.buffers[0].byteLength;
      this.sourceBuffers = [this.gltf.buffers[0]];
    }
  }

  get json() {
    return this.gltf.json;
  }

  getApplicationData(key) {
    const data = this.json[key];
    return data;
  }

  getExtraData(key) {
    const extras = this.json.extras || {};
    return extras[key];
  }

  getExtension(extensionName) {
    const isExtension = this.getUsedExtensions().find(name => name === extensionName);
    const extensions = this.json.extensions || {};
    return isExtension ? extensions[extensionName] || true : null;
  }

  getRequiredExtension(extensionName) {
    const isRequired = this.getRequiredExtensions().find(name => name === extensionName);
    return isRequired ? this.getExtension(extensionName) : null;
  }

  getRequiredExtensions() {
    return this.json.extensionsRequired || [];
  }

  getUsedExtensions() {
    return this.json.extensionsUsed || [];
  }

  getObjectExtension(object, extensionName) {
    const extensions = object.extensions || {};
    return extensions[extensionName];
  }

  getScene(index) {
    return this.getObject('scenes', index);
  }

  getNode(index) {
    return this.getObject('nodes', index);
  }

  getSkin(index) {
    return this.getObject('skins', index);
  }

  getMesh(index) {
    return this.getObject('meshes', index);
  }

  getMaterial(index) {
    return this.getObject('materials', index);
  }

  getAccessor(index) {
    return this.getObject('accessors', index);
  }

  getTexture(index) {
    return this.getObject('textures', index);
  }

  getSampler(index) {
    return this.getObject('samplers', index);
  }

  getImage(index) {
    return this.getObject('images', index);
  }

  getBufferView(index) {
    return this.getObject('bufferViews', index);
  }

  getBuffer(index) {
    return this.getObject('buffers', index);
  }

  getObject(array, index) {
    if (typeof index === 'object') {
      return index;
    }

    const object = this.json[array] && this.json[array][index];

    if (!object) {
      throw new Error("glTF file error: Could not find ".concat(array, "[").concat(index, "]"));
    }

    return object;
  }

  getTypedArrayForBufferView(bufferView) {
    bufferView = this.getBufferView(bufferView);
    const bufferIndex = bufferView.buffer;
    const binChunk = this.gltf.buffers[bufferIndex];
    assert$1(binChunk);
    const byteOffset = (bufferView.byteOffset || 0) + binChunk.byteOffset;
    return new Uint8Array(binChunk.arrayBuffer, byteOffset, bufferView.byteLength);
  }

  getTypedArrayForAccessor(accessor) {
    accessor = this.getAccessor(accessor);
    const bufferView = this.getBufferView(accessor.bufferView);
    const buffer = this.getBuffer(bufferView.buffer);
    const arrayBuffer = buffer.data;
    const {
      ArrayType,
      length
    } = getAccessorArrayTypeAndLength(accessor, bufferView);
    const byteOffset = bufferView.byteOffset + accessor.byteOffset;
    return new ArrayType(arrayBuffer, byteOffset, length);
  }

  getTypedArrayForImageData(image) {
    image = this.getAccessor(image);
    const bufferView = this.getBufferView(image.bufferView);
    const buffer = this.getBuffer(bufferView.buffer);
    const arrayBuffer = buffer.data;
    const byteOffset = bufferView.byteOffset || 0;
    return new Uint8Array(arrayBuffer, byteOffset, bufferView.byteLength);
  }

  addApplicationData(key, data) {
    this.json[key] = data;
    return this;
  }

  addExtraData(key, data) {
    this.json.extras = this.json.extras || {};
    this.json.extras[key] = data;
    return this;
  }

  addObjectExtension(object, extensionName, data) {
    object.extensions = object.extensions || {};
    object.extensions[extensionName] = data;
    this.registerUsedExtension(extensionName);
    return this;
  }

  setObjectExtension(object, extensionName, data) {
    const extensions = object.extensions || {};
    extensions[extensionName] = data;
  }

  removeObjectExtension(object, extensionName) {
    const extensions = object.extensions || {};
    const extension = extensions[extensionName];
    delete extensions[extensionName];
    return extension;
  }

  addExtension(extensionName, extensionData = {}) {
    assert$1(extensionData);
    this.json.extensions = this.json.extensions || {};
    this.json.extensions[extensionName] = extensionData;
    this.registerUsedExtension(extensionName);
    return extensionData;
  }

  addRequiredExtension(extensionName, extensionData = {}) {
    assert$1(extensionData);
    this.addExtension(extensionName, extensionData);
    this.registerRequiredExtension(extensionName);
    return extensionData;
  }

  registerUsedExtension(extensionName) {
    this.json.extensionsUsed = this.json.extensionsUsed || [];

    if (!this.json.extensionsUsed.find(ext => ext === extensionName)) {
      this.json.extensionsUsed.push(extensionName);
    }
  }

  registerRequiredExtension(extensionName) {
    this.registerUsedExtension(extensionName);
    this.json.extensionsRequired = this.json.extensionsRequired || [];

    if (!this.json.extensionsRequired.find(ext => ext === extensionName)) {
      this.json.extensionsRequired.push(extensionName);
    }
  }

  removeExtension(extensionName) {
    if (this.json.extensionsRequired) {
      this._removeStringFromArray(this.json.extensionsRequired, extensionName);
    }

    if (this.json.extensionsUsed) {
      this._removeStringFromArray(this.json.extensionsUsed, extensionName);
    }

    if (this.json.extensions) {
      delete this.json.extensions[extensionName];
    }
  }

  setDefaultScene(sceneIndex) {
    this.json.scene = sceneIndex;
  }

  addScene(scene) {
    const {
      nodeIndices
    } = scene;
    this.json.scenes = this.json.scenes || [];
    this.json.scenes.push({
      nodes: nodeIndices
    });
    return this.json.scenes.length - 1;
  }

  addNode(node) {
    const {
      meshIndex,
      matrix
    } = node;
    this.json.nodes = this.json.nodes || [];
    const nodeData = {
      mesh: meshIndex
    };

    if (matrix) {
      nodeData.matrix = matrix;
    }

    this.json.nodes.push(nodeData);
    return this.json.nodes.length - 1;
  }

  addMesh(mesh) {
    const {
      attributes,
      indices,
      material,
      mode = 4
    } = mesh;

    const accessors = this._addAttributes(attributes);

    const glTFMesh = {
      primitives: [{
        attributes: accessors,
        mode
      }]
    };

    if (indices) {
      const indicesAccessor = this._addIndices(indices);

      glTFMesh.primitives[0].indices = indicesAccessor;
    }

    if (Number.isFinite(material)) {
      glTFMesh.primitives[0].material = material;
    }

    this.json.meshes = this.json.meshes || [];
    this.json.meshes.push(glTFMesh);
    return this.json.meshes.length - 1;
  }

  addPointCloud(attributes) {
    const accessorIndices = this._addAttributes(attributes);

    const glTFMesh = {
      primitives: [{
        attributes: accessorIndices,
        mode: 0
      }]
    };
    this.json.meshes = this.json.meshes || [];
    this.json.meshes.push(glTFMesh);
    return this.json.meshes.length - 1;
  }

  addImage(imageData, mimeTypeOpt) {
    const metadata = getBinaryImageMetadata(imageData);
    const mimeType = mimeTypeOpt || (metadata === null || metadata === void 0 ? void 0 : metadata.mimeType);
    const bufferViewIndex = this.addBufferView(imageData);
    const glTFImage = {
      bufferView: bufferViewIndex,
      mimeType
    };
    this.json.images = this.json.images || [];
    this.json.images.push(glTFImage);
    return this.json.images.length - 1;
  }

  addBufferView(buffer) {
    const byteLength = buffer.byteLength;
    assert$1(Number.isFinite(byteLength));
    this.sourceBuffers = this.sourceBuffers || [];
    this.sourceBuffers.push(buffer);
    const glTFBufferView = {
      buffer: 0,
      byteOffset: this.byteLength,
      byteLength
    };
    this.byteLength += padToNBytes(byteLength, 4);
    this.json.bufferViews = this.json.bufferViews || [];
    this.json.bufferViews.push(glTFBufferView);
    return this.json.bufferViews.length - 1;
  }

  addAccessor(bufferViewIndex, accessor) {
    const glTFAccessor = {
      bufferView: bufferViewIndex,
      type: getAccessorTypeFromSize(accessor.size),
      componentType: accessor.componentType,
      count: accessor.count,
      max: accessor.max,
      min: accessor.min
    };
    this.json.accessors = this.json.accessors || [];
    this.json.accessors.push(glTFAccessor);
    return this.json.accessors.length - 1;
  }

  addBinaryBuffer(sourceBuffer, accessor = {
    size: 3
  }) {
    const bufferViewIndex = this.addBufferView(sourceBuffer);
    let minMax = {
      min: accessor.min,
      max: accessor.max
    };

    if (!minMax.min || !minMax.max) {
      minMax = this._getAccessorMinMax(sourceBuffer, accessor.size);
    }

    const accessorDefaults = {
      size: accessor.size,
      componentType: getComponentTypeFromArray(sourceBuffer),
      count: Math.round(sourceBuffer.length / accessor.size),
      min: minMax.min,
      max: minMax.max
    };
    return this.addAccessor(bufferViewIndex, Object.assign(accessorDefaults, accessor));
  }

  addTexture(texture) {
    const {
      imageIndex
    } = texture;
    const glTFTexture = {
      source: imageIndex
    };
    this.json.textures = this.json.textures || [];
    this.json.textures.push(glTFTexture);
    return this.json.textures.length - 1;
  }

  addMaterial(pbrMaterialInfo) {
    this.json.materials = this.json.materials || [];
    this.json.materials.push(pbrMaterialInfo);
    return this.json.materials.length - 1;
  }

  createBinaryChunk() {
    var _this$json, _this$json$buffers;

    this.gltf.buffers = [];
    const totalByteLength = this.byteLength;
    const arrayBuffer = new ArrayBuffer(totalByteLength);
    const targetArray = new Uint8Array(arrayBuffer);
    let dstByteOffset = 0;

    for (const sourceBuffer of this.sourceBuffers || []) {
      dstByteOffset = copyToArray(sourceBuffer, targetArray, dstByteOffset);
    }

    if ((_this$json = this.json) !== null && _this$json !== void 0 && (_this$json$buffers = _this$json.buffers) !== null && _this$json$buffers !== void 0 && _this$json$buffers[0]) {
      this.json.buffers[0].byteLength = totalByteLength;
    } else {
      this.json.buffers = [{
        byteLength: totalByteLength
      }];
    }

    this.gltf.binary = arrayBuffer;
    this.sourceBuffers = [arrayBuffer];
  }

  _removeStringFromArray(array, string) {
    let found = true;

    while (found) {
      const index = array.indexOf(string);

      if (index > -1) {
        array.splice(index, 1);
      } else {
        found = false;
      }
    }
  }

  _addAttributes(attributes = {}) {
    const result = {};

    for (const attributeKey in attributes) {
      const attributeData = attributes[attributeKey];

      const attrName = this._getGltfAttributeName(attributeKey);

      const accessor = this.addBinaryBuffer(attributeData.value, attributeData);
      result[attrName] = accessor;
    }

    return result;
  }

  _addIndices(indices) {
    return this.addBinaryBuffer(indices, {
      size: 1
    });
  }

  _getGltfAttributeName(attributeName) {
    switch (attributeName.toLowerCase()) {
      case 'position':
      case 'positions':
      case 'vertices':
        return 'POSITION';

      case 'normal':
      case 'normals':
        return 'NORMAL';

      case 'color':
      case 'colors':
        return 'COLOR_0';

      case 'texcoord':
      case 'texcoords':
        return 'TEXCOORD_0';

      default:
        return attributeName;
    }
  }

  _getAccessorMinMax(buffer, size) {
    const result = {
      min: null,
      max: null
    };

    if (buffer.length < size) {
      return result;
    }

    result.min = [];
    result.max = [];
    const initValues = buffer.subarray(0, size);

    for (const value of initValues) {
      result.min.push(value);
      result.max.push(value);
    }

    for (let index = size; index < buffer.length; index += size) {
      for (let componentIndex = 0; componentIndex < size; componentIndex++) {
        result.min[0 + componentIndex] = Math.min(result.min[0 + componentIndex], buffer[index + componentIndex]);
        result.max[0 + componentIndex] = Math.max(result.max[0 + componentIndex], buffer[index + componentIndex]);
      }
    }

    return result;
  }

}

const wasm_base = '[encoded data, 7357 characters]';
const wasm_simd = '[encoded data, 10658 characters]';
const detector = new Uint8Array([0, 97, 115, 109, 1, 0, 0, 0, 1, 4, 1, 96, 0, 0, 3, 3, 2, 0, 0, 5, 3, 1, 0, 1, 12, 1, 0, 10, 22, 2, 12, 0, 65, 0, 65, 0, 65, 0, 252, 10, 0, 0, 11, 7, 0, 65, 0, 253, 15, 26, 11]);
const wasmpack = new Uint8Array([32, 0, 65, 253, 3, 1, 2, 34, 4, 106, 6, 5, 11, 8, 7, 20, 13, 33, 12, 16, 128, 9, 116, 64, 19, 113, 127, 15, 10, 21, 22, 14, 255, 66, 24, 54, 136, 107, 18, 23, 192, 26, 114, 118, 132, 17, 77, 101, 130, 144, 27, 87, 131, 44, 45, 74, 156, 154, 70, 167]);
const FILTERS = {
  0: '',
  1: 'meshopt_decodeFilterOct',
  2: 'meshopt_decodeFilterQuat',
  3: 'meshopt_decodeFilterExp',
  NONE: '',
  OCTAHEDRAL: 'meshopt_decodeFilterOct',
  QUATERNION: 'meshopt_decodeFilterQuat',
  EXPONENTIAL: 'meshopt_decodeFilterExp'
};
const DECODERS = {
  0: 'meshopt_decodeVertexBuffer',
  1: 'meshopt_decodeIndexBuffer',
  2: 'meshopt_decodeIndexSequence',
  ATTRIBUTES: 'meshopt_decodeVertexBuffer',
  TRIANGLES: 'meshopt_decodeIndexBuffer',
  INDICES: 'meshopt_decodeIndexSequence'
};
async function meshoptDecodeGltfBuffer(target, count, size, source, mode, filter = 'NONE') {
  const instance = await loadWasmInstance();
  decode$5(instance, instance.exports[DECODERS[mode]], target, count, size, source, instance.exports[FILTERS[filter || 'NONE']]);
}
let wasmPromise;

async function loadWasmInstance() {
  if (!wasmPromise) {
    wasmPromise = loadWasmModule();
  }

  return wasmPromise;
}

async function loadWasmModule() {
  let wasm = wasm_base;

  if (WebAssembly.validate(detector)) {
    wasm = wasm_simd;
    console.log('Warning: meshopt_decoder is using experimental SIMD support');
  }

  const result = await WebAssembly.instantiate(unpack(wasm), {});
  await result.instance.exports.__wasm_call_ctors();
  return result.instance;
}

function unpack(data) {
  const result = new Uint8Array(data.length);

  for (let i = 0; i < data.length; ++i) {
    const ch = data.charCodeAt(i);
    result[i] = ch > 96 ? ch - 71 : ch > 64 ? ch - 65 : ch > 47 ? ch + 4 : ch > 46 ? 63 : 62;
  }

  let write = 0;

  for (let i = 0; i < data.length; ++i) {
    result[write++] = result[i] < 60 ? wasmpack[result[i]] : (result[i] - 60) * 64 + result[++i];
  }

  return result.buffer.slice(0, write);
}

function decode$5(instance, fun, target, count, size, source, filter) {
  const sbrk = instance.exports.sbrk;
  const count4 = count + 3 & ~3;
  const tp = sbrk(count4 * size);
  const sp = sbrk(source.length);
  const heap = new Uint8Array(instance.exports.memory.buffer);
  heap.set(source, sp);
  const res = fun(tp, count, size, sp, source.length);

  if (res === 0 && filter) {
    filter(tp, count4, size);
  }

  target.set(heap.subarray(tp, tp + count * size));
  sbrk(tp - sbrk(0));

  if (res !== 0) {
    throw new Error("Malformed buffer data: ".concat(res));
  }
}

const EXT_MESHOPT_COMPRESSION = 'EXT_meshopt_compression';
const name$6 = EXT_MESHOPT_COMPRESSION;
async function decode$4(gltfData, options) {
  var _options$gltf;

  const scenegraph = new GLTFScenegraph(gltfData);

  if (!(options !== null && options !== void 0 && (_options$gltf = options.gltf) !== null && _options$gltf !== void 0 && _options$gltf.decompressMeshes)) {
    return;
  }

  const promises = [];

  for (const bufferViewIndex of gltfData.json.bufferViews || []) {
    promises.push(decodeMeshoptBufferView(scenegraph, bufferViewIndex));
  }

  await Promise.all(promises);
  scenegraph.removeExtension(EXT_MESHOPT_COMPRESSION);
}

async function decodeMeshoptBufferView(scenegraph, bufferView) {
  const meshoptExtension = scenegraph.getObjectExtension(bufferView, EXT_MESHOPT_COMPRESSION);

  if (meshoptExtension) {
    const {
      byteOffset = 0,
      byteLength = 0,
      byteStride,
      count,
      mode,
      filter = 'NONE',
      buffer: bufferIndex
    } = meshoptExtension;
    const buffer = scenegraph.gltf.buffers[bufferIndex];
    const source = new Uint8Array(buffer.arrayBuffer, buffer.byteOffset + byteOffset, byteLength);
    const result = new Uint8Array(scenegraph.gltf.buffers[bufferView.buffer].arrayBuffer, bufferView.byteOffset, bufferView.byteLength);
    await meshoptDecodeGltfBuffer(result, count, byteStride, source, mode, filter);
    return result;
  }

  return null;
}

var EXT_meshopt_compression = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$6,
    decode: decode$4
});

const EXT_TEXTURE_WEBP = 'EXT_texture_webp';
const name$5 = EXT_TEXTURE_WEBP;
function preprocess$3(gltfData, options) {
  const scenegraph = new GLTFScenegraph(gltfData);

  if (!_isImageFormatSupported('image/webp')) {
    if (scenegraph.getRequiredExtensions().includes(EXT_TEXTURE_WEBP)) {
      throw new Error("gltf: Required extension ".concat(EXT_TEXTURE_WEBP, " not supported by browser"));
    }

    return;
  }

  const {
    json
  } = scenegraph;

  for (const texture of json.textures || []) {
    const extension = scenegraph.getObjectExtension(texture, EXT_TEXTURE_WEBP);

    if (extension) {
      texture.source = extension.source;
    }

    scenegraph.removeObjectExtension(texture, EXT_TEXTURE_WEBP);
  }

  scenegraph.removeExtension(EXT_TEXTURE_WEBP);
}

var EXT_texture_webp = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$5,
    preprocess: preprocess$3
});

const KHR_TEXTURE_BASISU = 'KHR_texture_basisu';
const name$4 = KHR_TEXTURE_BASISU;
function preprocess$2(gltfData, options) {
  const scene = new GLTFScenegraph(gltfData);
  const {
    json
  } = scene;

  for (const texture of json.textures || []) {
    const extension = scene.getObjectExtension(texture, KHR_TEXTURE_BASISU);

    if (extension) {
      texture.source = extension.source;
    }

    scene.removeObjectExtension(texture, KHR_TEXTURE_BASISU);
  }

  scene.removeExtension(KHR_TEXTURE_BASISU);
}

var KHR_texture_basisu = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$4,
    preprocess: preprocess$2
});

function getGLTFAccessors(attributes) {
  const accessors = {};

  for (const name in attributes) {
    const attribute = attributes[name];

    if (name !== 'indices') {
      const glTFAccessor = getGLTFAccessor(attribute);
      accessors[name] = glTFAccessor;
    }
  }

  return accessors;
}
function getGLTFAccessor(attribute) {
  const {
    buffer,
    size,
    count
  } = getAccessorData(attribute);
  const glTFAccessor = {
    value: buffer,
    size,
    byteOffset: 0,
    count,
    type: getAccessorTypeFromSize(size),
    componentType: getComponentTypeFromArray(buffer)
  };
  return glTFAccessor;
}

function getAccessorData(attribute) {
  let buffer = attribute;
  let size = 1;
  let count = 0;

  if (attribute && attribute.value) {
    buffer = attribute.value;
    size = attribute.size || 1;
  }

  if (buffer) {
    if (!ArrayBuffer.isView(buffer)) {
      buffer = toTypedArray(buffer, Float32Array);
    }

    count = buffer.length / size;
  }

  return {
    buffer,
    size,
    count
  };
}

function toTypedArray(array, ArrayType, convertTypedArrays = false) {
  if (!array) {
    return null;
  }

  if (Array.isArray(array)) {
    return new ArrayType(array);
  }

  if (convertTypedArrays && !(array instanceof ArrayType)) {
    return new ArrayType(array);
  }

  return array;
}

const KHR_DRACO_MESH_COMPRESSION = 'KHR_draco_mesh_compression';
const name$3 = KHR_DRACO_MESH_COMPRESSION;
function preprocess$1(gltfData, options, context) {
  const scenegraph = new GLTFScenegraph(gltfData);

  for (const primitive of makeMeshPrimitiveIterator(scenegraph)) {
    if (scenegraph.getObjectExtension(primitive, KHR_DRACO_MESH_COMPRESSION)) ;
  }
}
async function decode$3(gltfData, options, context) {
  var _options$gltf;

  if (!(options !== null && options !== void 0 && (_options$gltf = options.gltf) !== null && _options$gltf !== void 0 && _options$gltf.decompressMeshes)) {
    return;
  }

  const scenegraph = new GLTFScenegraph(gltfData);
  const promises = [];

  for (const primitive of makeMeshPrimitiveIterator(scenegraph)) {
    if (scenegraph.getObjectExtension(primitive, KHR_DRACO_MESH_COMPRESSION)) {
      promises.push(decompressPrimitive(scenegraph, primitive, options, context));
    }
  }

  await Promise.all(promises);
  scenegraph.removeExtension(KHR_DRACO_MESH_COMPRESSION);
}
function encode$3(gltfData, options = {}) {
  const scenegraph = new GLTFScenegraph(gltfData);

  for (const mesh of scenegraph.json.meshes || []) {
    compressMesh(mesh);
    scenegraph.addRequiredExtension(KHR_DRACO_MESH_COMPRESSION);
  }
}

async function decompressPrimitive(scenegraph, primitive, options, context) {
  const dracoExtension = scenegraph.getObjectExtension(primitive, KHR_DRACO_MESH_COMPRESSION);

  if (!dracoExtension) {
    return;
  }

  const buffer = scenegraph.getTypedArrayForBufferView(dracoExtension.bufferView);
  const bufferCopy = sliceArrayBuffer(buffer.buffer, buffer.byteOffset);
  const {
    parse
  } = context;
  const dracoOptions = { ...options
  };
  delete dracoOptions['3d-tiles'];
  const decodedData = await parse(bufferCopy, DracoLoader, dracoOptions, context);
  const decodedAttributes = getGLTFAccessors(decodedData.attributes);

  for (const [attributeName, decodedAttribute] of Object.entries(decodedAttributes)) {
    if (attributeName in primitive.attributes) {
      const accessorIndex = primitive.attributes[attributeName];
      const accessor = scenegraph.getAccessor(accessorIndex);

      if (accessor !== null && accessor !== void 0 && accessor.min && accessor !== null && accessor !== void 0 && accessor.max) {
        decodedAttribute.min = accessor.min;
        decodedAttribute.max = accessor.max;
      }
    }
  }

  primitive.attributes = decodedAttributes;

  if (decodedData.indices) {
    primitive.indices = getGLTFAccessor(decodedData.indices);
  }

  checkPrimitive(primitive);
}

function compressMesh(attributes, indices, mode = 4, options, context) {
  var _context$parseSync;

  if (!options.DracoWriter) {
    throw new Error('options.gltf.DracoWriter not provided');
  }

  const compressedData = options.DracoWriter.encodeSync({
    attributes
  });
  const decodedData = context === null || context === void 0 ? void 0 : (_context$parseSync = context.parseSync) === null || _context$parseSync === void 0 ? void 0 : _context$parseSync.call(context, {
    attributes
  });

  const fauxAccessors = options._addFauxAttributes(decodedData.attributes);

  const bufferViewIndex = options.addBufferView(compressedData);
  const glTFMesh = {
    primitives: [{
      attributes: fauxAccessors,
      mode,
      extensions: {
        [KHR_DRACO_MESH_COMPRESSION]: {
          bufferView: bufferViewIndex,
          attributes: fauxAccessors
        }
      }
    }]
  };
  return glTFMesh;
}

function checkPrimitive(primitive) {
  if (!primitive.attributes && Object.keys(primitive.attributes).length > 0) {
    throw new Error('glTF: Empty primitive detected: Draco decompression failure?');
  }
}

function* makeMeshPrimitiveIterator(scenegraph) {
  for (const mesh of scenegraph.json.meshes || []) {
    for (const primitive of mesh.primitives) {
      yield primitive;
    }
  }
}

var KHR_draco_mesh_compression = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$3,
    preprocess: preprocess$1,
    decode: decode$3,
    encode: encode$3
});

const KHR_LIGHTS_PUNCTUAL = 'KHR_lights_punctual';
const name$2 = KHR_LIGHTS_PUNCTUAL;
async function decode$2(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;
  const extension = gltfScenegraph.getExtension(KHR_LIGHTS_PUNCTUAL);

  if (extension) {
    gltfScenegraph.json.lights = extension.lights;
    gltfScenegraph.removeExtension(KHR_LIGHTS_PUNCTUAL);
  }

  for (const node of json.nodes || []) {
    const nodeExtension = gltfScenegraph.getObjectExtension(node, KHR_LIGHTS_PUNCTUAL);

    if (nodeExtension) {
      node.light = nodeExtension.light;
    }

    gltfScenegraph.removeObjectExtension(node, KHR_LIGHTS_PUNCTUAL);
  }
}
async function encode$2(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;

  if (json.lights) {
    const extension = gltfScenegraph.addExtension(KHR_LIGHTS_PUNCTUAL);
    assert$1(!extension.lights);
    extension.lights = json.lights;
    delete json.lights;
  }

  if (gltfScenegraph.json.lights) {
    for (const light of gltfScenegraph.json.lights) {
      const node = light.node;
      gltfScenegraph.addObjectExtension(node, KHR_LIGHTS_PUNCTUAL, light);
    }

    delete gltfScenegraph.json.lights;
  }
}

var KHR_lights_punctual = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$2,
    decode: decode$2,
    encode: encode$2
});

const KHR_MATERIALS_UNLIT = 'KHR_materials_unlit';
const name$1 = KHR_MATERIALS_UNLIT;
async function decode$1(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;
  gltfScenegraph.removeExtension(KHR_MATERIALS_UNLIT);

  for (const material of json.materials || []) {
    const extension = material.extensions && material.extensions.KHR_materials_unlit;

    if (extension) {
      material.unlit = true;
    }

    gltfScenegraph.removeObjectExtension(material, KHR_MATERIALS_UNLIT);
  }
}
function encode$1(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;

  if (gltfScenegraph.materials) {
    for (const material of json.materials || []) {
      if (material.unlit) {
        delete material.unlit;
        gltfScenegraph.addObjectExtension(material, KHR_MATERIALS_UNLIT, {});
        gltfScenegraph.addExtension(KHR_MATERIALS_UNLIT);
      }
    }
  }
}

var KHR_materials_unlit = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name$1,
    decode: decode$1,
    encode: encode$1
});

const KHR_TECHNIQUES_WEBGL = 'KHR_techniques_webgl';
const name = KHR_TECHNIQUES_WEBGL;
async function decode(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;
  const extension = gltfScenegraph.getExtension(KHR_TECHNIQUES_WEBGL);

  if (extension) {
    const techniques = resolveTechniques(extension, gltfScenegraph);

    for (const material of json.materials || []) {
      const materialExtension = gltfScenegraph.getObjectExtension(material, KHR_TECHNIQUES_WEBGL);

      if (materialExtension) {
        material.technique = Object.assign({}, materialExtension, techniques[materialExtension.technique]);
        material.technique.values = resolveValues(material.technique, gltfScenegraph);
      }

      gltfScenegraph.removeObjectExtension(material, KHR_TECHNIQUES_WEBGL);
    }

    gltfScenegraph.removeExtension(KHR_TECHNIQUES_WEBGL);
  }
}
async function encode(gltfData, options) {}

function resolveTechniques(techniquesExtension, gltfScenegraph) {
  const {
    programs = [],
    shaders = [],
    techniques = []
  } = techniquesExtension;
  const textDecoder = new TextDecoder();
  shaders.forEach(shader => {
    if (Number.isFinite(shader.bufferView)) {
      shader.code = textDecoder.decode(gltfScenegraph.getTypedArrayForBufferView(shader.bufferView));
    } else {
      throw new Error('KHR_techniques_webgl: no shader code');
    }
  });
  programs.forEach(program => {
    program.fragmentShader = shaders[program.fragmentShader];
    program.vertexShader = shaders[program.vertexShader];
  });
  techniques.forEach(technique => {
    technique.program = programs[technique.program];
  });
  return techniques;
}

function resolveValues(technique, gltfScenegraph) {
  const values = Object.assign({}, technique.values);
  Object.keys(technique.uniforms || {}).forEach(uniform => {
    if (technique.uniforms[uniform].value && !(uniform in values)) {
      values[uniform] = technique.uniforms[uniform].value;
    }
  });
  Object.keys(values).forEach(uniform => {
    if (typeof values[uniform] === 'object' && values[uniform].index !== undefined) {
      values[uniform].texture = gltfScenegraph.getTexture(values[uniform].index);
    }
  });
  return values;
}

var KHR_techniques_webgl = /*#__PURE__*/Object.freeze({
    __proto__: null,
    name: name,
    decode: decode,
    encode: encode
});

const EXTENSIONS$1 = [EXT_meshopt_compression, EXT_texture_webp, KHR_texture_basisu, KHR_draco_mesh_compression, KHR_lights_punctual, KHR_materials_unlit, KHR_techniques_webgl];
function preprocessExtensions(gltf, options = {}, context) {
  const extensions = EXTENSIONS$1.filter(extension => useExtension(extension.name, options));

  for (const extension of extensions) {
    var _extension$preprocess;

    (_extension$preprocess = extension.preprocess) === null || _extension$preprocess === void 0 ? void 0 : _extension$preprocess.call(extension, gltf, options, context);
  }
}
async function decodeExtensions(gltf, options = {}, context) {
  const extensions = EXTENSIONS$1.filter(extension => useExtension(extension.name, options));

  for (const extension of extensions) {
    var _extension$decode;

    await ((_extension$decode = extension.decode) === null || _extension$decode === void 0 ? void 0 : _extension$decode.call(extension, gltf, options, context));
  }
}

function useExtension(extensionName, options) {
  var _options$gltf;

  const excludes = (options === null || options === void 0 ? void 0 : (_options$gltf = options.gltf) === null || _options$gltf === void 0 ? void 0 : _options$gltf.excludeExtensions) || {};
  const exclude = extensionName in excludes && !excludes[extensionName];
  return !exclude;
}

const KHR_BINARY_GLTF = 'KHR_binary_glTF';
function preprocess(gltfData) {
  const gltfScenegraph = new GLTFScenegraph(gltfData);
  const {
    json
  } = gltfScenegraph;

  for (const image of json.images || []) {
    const extension = gltfScenegraph.getObjectExtension(image, KHR_BINARY_GLTF);

    if (extension) {
      Object.assign(image, extension);
    }

    gltfScenegraph.removeObjectExtension(image, KHR_BINARY_GLTF);
  }

  if (json.buffers && json.buffers[0]) {
    delete json.buffers[0].uri;
  }

  gltfScenegraph.removeExtension(KHR_BINARY_GLTF);
}

const GLTF_ARRAYS = {
  accessors: 'accessor',
  animations: 'animation',
  buffers: 'buffer',
  bufferViews: 'bufferView',
  images: 'image',
  materials: 'material',
  meshes: 'mesh',
  nodes: 'node',
  samplers: 'sampler',
  scenes: 'scene',
  skins: 'skin',
  textures: 'texture'
};
const GLTF_KEYS = {
  accessor: 'accessors',
  animations: 'animation',
  buffer: 'buffers',
  bufferView: 'bufferViews',
  image: 'images',
  material: 'materials',
  mesh: 'meshes',
  node: 'nodes',
  sampler: 'samplers',
  scene: 'scenes',
  skin: 'skins',
  texture: 'textures'
};

class GLTFV1Normalizer {
  constructor() {
    _defineProperty(this, "idToIndexMap", {
      animations: {},
      accessors: {},
      buffers: {},
      bufferViews: {},
      images: {},
      materials: {},
      meshes: {},
      nodes: {},
      samplers: {},
      scenes: {},
      skins: {},
      textures: {}
    });

    _defineProperty(this, "json", void 0);
  }

  normalize(gltf, options) {
    this.json = gltf.json;
    const json = gltf.json;

    switch (json.asset && json.asset.version) {
      case '2.0':
        return;

      case undefined:
      case '1.0':
        break;

      default:
        console.warn("glTF: Unknown version ".concat(json.asset.version));
        return;
    }

    if (!options.normalize) {
      throw new Error('glTF v1 is not supported.');
    }

    console.warn('Converting glTF v1 to glTF v2 format. This is experimental and may fail.');

    this._addAsset(json);

    this._convertTopLevelObjectsToArrays(json);

    preprocess(gltf);

    this._convertObjectIdsToArrayIndices(json);

    this._updateObjects(json);

    this._updateMaterial(json);
  }

  _addAsset(json) {
    json.asset = json.asset || {};
    json.asset.version = '2.0';
    json.asset.generator = json.asset.generator || 'Normalized to glTF 2.0 by loaders.gl';
  }

  _convertTopLevelObjectsToArrays(json) {
    for (const arrayName in GLTF_ARRAYS) {
      this._convertTopLevelObjectToArray(json, arrayName);
    }
  }

  _convertTopLevelObjectToArray(json, mapName) {
    const objectMap = json[mapName];

    if (!objectMap || Array.isArray(objectMap)) {
      return;
    }

    json[mapName] = [];

    for (const id in objectMap) {
      const object = objectMap[id];
      object.id = object.id || id;
      const index = json[mapName].length;
      json[mapName].push(object);
      this.idToIndexMap[mapName][id] = index;
    }
  }

  _convertObjectIdsToArrayIndices(json) {
    for (const arrayName in GLTF_ARRAYS) {
      this._convertIdsToIndices(json, arrayName);
    }

    if ('scene' in json) {
      json.scene = this._convertIdToIndex(json.scene, 'scene');
    }

    for (const texture of json.textures) {
      this._convertTextureIds(texture);
    }

    for (const mesh of json.meshes) {
      this._convertMeshIds(mesh);
    }

    for (const node of json.nodes) {
      this._convertNodeIds(node);
    }

    for (const node of json.scenes) {
      this._convertSceneIds(node);
    }
  }

  _convertTextureIds(texture) {
    if (texture.source) {
      texture.source = this._convertIdToIndex(texture.source, 'image');
    }
  }

  _convertMeshIds(mesh) {
    for (const primitive of mesh.primitives) {
      const {
        attributes,
        indices,
        material
      } = primitive;

      for (const attributeName in attributes) {
        attributes[attributeName] = this._convertIdToIndex(attributes[attributeName], 'accessor');
      }

      if (indices) {
        primitive.indices = this._convertIdToIndex(indices, 'accessor');
      }

      if (material) {
        primitive.material = this._convertIdToIndex(material, 'material');
      }
    }
  }

  _convertNodeIds(node) {
    if (node.children) {
      node.children = node.children.map(child => this._convertIdToIndex(child, 'node'));
    }

    if (node.meshes) {
      node.meshes = node.meshes.map(mesh => this._convertIdToIndex(mesh, 'mesh'));
    }
  }

  _convertSceneIds(scene) {
    if (scene.nodes) {
      scene.nodes = scene.nodes.map(node => this._convertIdToIndex(node, 'node'));
    }
  }

  _convertIdsToIndices(json, topLevelArrayName) {
    if (!json[topLevelArrayName]) {
      console.warn("gltf v1: json doesn't contain attribute ".concat(topLevelArrayName));
      json[topLevelArrayName] = [];
    }

    for (const object of json[topLevelArrayName]) {
      for (const key in object) {
        const id = object[key];

        const index = this._convertIdToIndex(id, key);

        object[key] = index;
      }
    }
  }

  _convertIdToIndex(id, key) {
    const arrayName = GLTF_KEYS[key];

    if (arrayName in this.idToIndexMap) {
      const index = this.idToIndexMap[arrayName][id];

      if (!Number.isFinite(index)) {
        throw new Error("gltf v1: failed to resolve ".concat(key, " with id ").concat(id));
      }

      return index;
    }

    return id;
  }

  _updateObjects(json) {
    for (const buffer of this.json.buffers) {
      delete buffer.type;
    }
  }

  _updateMaterial(json) {
    for (const material of json.materials) {
      var _material$values, _material$values2, _material$values3;

      material.pbrMetallicRoughness = {
        baseColorFactor: [1, 1, 1, 1],
        metallicFactor: 1,
        roughnessFactor: 1
      };
      const textureId = ((_material$values = material.values) === null || _material$values === void 0 ? void 0 : _material$values.tex) || ((_material$values2 = material.values) === null || _material$values2 === void 0 ? void 0 : _material$values2.texture2d_0) || ((_material$values3 = material.values) === null || _material$values3 === void 0 ? void 0 : _material$values3.diffuseTex);
      const textureIndex = json.textures.findIndex(texture => texture.id === textureId);

      if (textureIndex !== -1) {
        material.pbrMetallicRoughness.baseColorTexture = {
          index: textureIndex
        };
      }
    }
  }

}

function normalizeGLTFV1(gltf, options = {}) {
  return new GLTFV1Normalizer().normalize(gltf, options);
}

const COMPONENTS = {
  SCALAR: 1,
  VEC2: 2,
  VEC3: 3,
  VEC4: 4,
  MAT2: 4,
  MAT3: 9,
  MAT4: 16
};
const BYTES = {
  5120: 1,
  5121: 1,
  5122: 2,
  5123: 2,
  5125: 4,
  5126: 4
};
const GL_SAMPLER = {
  TEXTURE_MAG_FILTER: 0x2800,
  TEXTURE_MIN_FILTER: 0x2801,
  TEXTURE_WRAP_S: 0x2802,
  TEXTURE_WRAP_T: 0x2803,
  REPEAT: 0x2901,
  LINEAR: 0x2601,
  NEAREST_MIPMAP_LINEAR: 0x2702
};
const SAMPLER_PARAMETER_GLTF_TO_GL = {
  magFilter: GL_SAMPLER.TEXTURE_MAG_FILTER,
  minFilter: GL_SAMPLER.TEXTURE_MIN_FILTER,
  wrapS: GL_SAMPLER.TEXTURE_WRAP_S,
  wrapT: GL_SAMPLER.TEXTURE_WRAP_T
};
const DEFAULT_SAMPLER = {
  [GL_SAMPLER.TEXTURE_MAG_FILTER]: GL_SAMPLER.LINEAR,
  [GL_SAMPLER.TEXTURE_MIN_FILTER]: GL_SAMPLER.NEAREST_MIPMAP_LINEAR,
  [GL_SAMPLER.TEXTURE_WRAP_S]: GL_SAMPLER.REPEAT,
  [GL_SAMPLER.TEXTURE_WRAP_T]: GL_SAMPLER.REPEAT
};

function getBytesFromComponentType(componentType) {
  return BYTES[componentType];
}

function getSizeFromAccessorType(type) {
  return COMPONENTS[type];
}

class GLTFPostProcessor {
  constructor() {
    _defineProperty(this, "baseUri", '');

    _defineProperty(this, "json", {});

    _defineProperty(this, "buffers", []);

    _defineProperty(this, "images", []);
  }

  postProcess(gltf, options = {}) {
    const {
      json,
      buffers = [],
      images = [],
      baseUri = ''
    } = gltf;
    assert$1(json);
    this.baseUri = baseUri;
    this.json = json;
    this.buffers = buffers;
    this.images = images;

    this._resolveTree(this.json, options);

    return this.json;
  }

  _resolveTree(json, options = {}) {
    if (json.bufferViews) {
      json.bufferViews = json.bufferViews.map((bufView, i) => this._resolveBufferView(bufView, i));
    }

    if (json.images) {
      json.images = json.images.map((image, i) => this._resolveImage(image, i));
    }

    if (json.samplers) {
      json.samplers = json.samplers.map((sampler, i) => this._resolveSampler(sampler, i));
    }

    if (json.textures) {
      json.textures = json.textures.map((texture, i) => this._resolveTexture(texture, i));
    }

    if (json.accessors) {
      json.accessors = json.accessors.map((accessor, i) => this._resolveAccessor(accessor, i));
    }

    if (json.materials) {
      json.materials = json.materials.map((material, i) => this._resolveMaterial(material, i));
    }

    if (json.meshes) {
      json.meshes = json.meshes.map((mesh, i) => this._resolveMesh(mesh, i));
    }

    if (json.nodes) {
      json.nodes = json.nodes.map((node, i) => this._resolveNode(node, i));
    }

    if (json.skins) {
      json.skins = json.skins.map((skin, i) => this._resolveSkin(skin, i));
    }

    if (json.scenes) {
      json.scenes = json.scenes.map((scene, i) => this._resolveScene(scene, i));
    }

    if (json.scene !== undefined) {
      json.scene = json.scenes[this.json.scene];
    }
  }

  getScene(index) {
    return this._get('scenes', index);
  }

  getNode(index) {
    return this._get('nodes', index);
  }

  getSkin(index) {
    return this._get('skins', index);
  }

  getMesh(index) {
    return this._get('meshes', index);
  }

  getMaterial(index) {
    return this._get('materials', index);
  }

  getAccessor(index) {
    return this._get('accessors', index);
  }

  getCamera(index) {
    return null;
  }

  getTexture(index) {
    return this._get('textures', index);
  }

  getSampler(index) {
    return this._get('samplers', index);
  }

  getImage(index) {
    return this._get('images', index);
  }

  getBufferView(index) {
    return this._get('bufferViews', index);
  }

  getBuffer(index) {
    return this._get('buffers', index);
  }

  _get(array, index) {
    if (typeof index === 'object') {
      return index;
    }

    const object = this.json[array] && this.json[array][index];

    if (!object) {
      console.warn("glTF file error: Could not find ".concat(array, "[").concat(index, "]"));
    }

    return object;
  }

  _resolveScene(scene, index) {
    scene.id = scene.id || "scene-".concat(index);
    scene.nodes = (scene.nodes || []).map(node => this.getNode(node));
    return scene;
  }

  _resolveNode(node, index) {
    node.id = node.id || "node-".concat(index);

    if (node.children) {
      node.children = node.children.map(child => this.getNode(child));
    }

    if (node.mesh !== undefined) {
      node.mesh = this.getMesh(node.mesh);
    } else if (node.meshes !== undefined && node.meshes.length) {
      node.mesh = node.meshes.reduce((accum, meshIndex) => {
        const mesh = this.getMesh(meshIndex);
        accum.id = mesh.id;
        accum.primitives = accum.primitives.concat(mesh.primitives);
        return accum;
      }, {
        primitives: []
      });
    }

    if (node.camera !== undefined) {
      node.camera = this.getCamera(node.camera);
    }

    if (node.skin !== undefined) {
      node.skin = this.getSkin(node.skin);
    }

    return node;
  }

  _resolveSkin(skin, index) {
    skin.id = skin.id || "skin-".concat(index);
    skin.inverseBindMatrices = this.getAccessor(skin.inverseBindMatrices);
    return skin;
  }

  _resolveMesh(mesh, index) {
    mesh.id = mesh.id || "mesh-".concat(index);

    if (mesh.primitives) {
      mesh.primitives = mesh.primitives.map(primitive => {
        primitive = { ...primitive
        };
        const attributes = primitive.attributes;
        primitive.attributes = {};

        for (const attribute in attributes) {
          primitive.attributes[attribute] = this.getAccessor(attributes[attribute]);
        }

        if (primitive.indices !== undefined) {
          primitive.indices = this.getAccessor(primitive.indices);
        }

        if (primitive.material !== undefined) {
          primitive.material = this.getMaterial(primitive.material);
        }

        return primitive;
      });
    }

    return mesh;
  }

  _resolveMaterial(material, index) {
    material.id = material.id || "material-".concat(index);

    if (material.normalTexture) {
      material.normalTexture = { ...material.normalTexture
      };
      material.normalTexture.texture = this.getTexture(material.normalTexture.index);
    }

    if (material.occlusionTexture) {
      material.occlustionTexture = { ...material.occlustionTexture
      };
      material.occlusionTexture.texture = this.getTexture(material.occlusionTexture.index);
    }

    if (material.emissiveTexture) {
      material.emmisiveTexture = { ...material.emmisiveTexture
      };
      material.emissiveTexture.texture = this.getTexture(material.emissiveTexture.index);
    }

    if (!material.emissiveFactor) {
      material.emissiveFactor = material.emmisiveTexture ? [1, 1, 1] : [0, 0, 0];
    }

    if (material.pbrMetallicRoughness) {
      material.pbrMetallicRoughness = { ...material.pbrMetallicRoughness
      };
      const mr = material.pbrMetallicRoughness;

      if (mr.baseColorTexture) {
        mr.baseColorTexture = { ...mr.baseColorTexture
        };
        mr.baseColorTexture.texture = this.getTexture(mr.baseColorTexture.index);
      }

      if (mr.metallicRoughnessTexture) {
        mr.metallicRoughnessTexture = { ...mr.metallicRoughnessTexture
        };
        mr.metallicRoughnessTexture.texture = this.getTexture(mr.metallicRoughnessTexture.index);
      }
    }

    return material;
  }

  _resolveAccessor(accessor, index) {
    accessor.id = accessor.id || "accessor-".concat(index);

    if (accessor.bufferView !== undefined) {
      accessor.bufferView = this.getBufferView(accessor.bufferView);
    }

    accessor.bytesPerComponent = getBytesFromComponentType(accessor.componentType);
    accessor.components = getSizeFromAccessorType(accessor.type);
    accessor.bytesPerElement = accessor.bytesPerComponent * accessor.components;

    if (accessor.bufferView) {
      const buffer = accessor.bufferView.buffer;
      const {
        ArrayType,
        byteLength
      } = getAccessorArrayTypeAndLength(accessor, accessor.bufferView);
      const byteOffset = (accessor.bufferView.byteOffset || 0) + (accessor.byteOffset || 0) + buffer.byteOffset;
      let cutBuffer = buffer.arrayBuffer.slice(byteOffset, byteOffset + byteLength);

      if (accessor.bufferView.byteStride) {
        cutBuffer = this._getValueFromInterleavedBuffer(buffer, byteOffset, accessor.bufferView.byteStride, accessor.bytesPerElement, accessor.count);
      }

      accessor.value = new ArrayType(cutBuffer);
    }

    return accessor;
  }

  _getValueFromInterleavedBuffer(buffer, byteOffset, byteStride, bytesPerElement, count) {
    const result = new Uint8Array(count * bytesPerElement);

    for (let i = 0; i < count; i++) {
      const elementOffset = byteOffset + i * byteStride;
      result.set(new Uint8Array(buffer.arrayBuffer.slice(elementOffset, elementOffset + bytesPerElement)), i * bytesPerElement);
    }

    return result.buffer;
  }

  _resolveTexture(texture, index) {
    texture.id = texture.id || "texture-".concat(index);
    texture.sampler = 'sampler' in texture ? this.getSampler(texture.sampler) : DEFAULT_SAMPLER;
    texture.source = this.getImage(texture.source);
    return texture;
  }

  _resolveSampler(sampler, index) {
    sampler.id = sampler.id || "sampler-".concat(index);
    sampler.parameters = {};

    for (const key in sampler) {
      const glEnum = this._enumSamplerParameter(key);

      if (glEnum !== undefined) {
        sampler.parameters[glEnum] = sampler[key];
      }
    }

    return sampler;
  }

  _enumSamplerParameter(key) {
    return SAMPLER_PARAMETER_GLTF_TO_GL[key];
  }

  _resolveImage(image, index) {
    image.id = image.id || "image-".concat(index);

    if (image.bufferView !== undefined) {
      image.bufferView = this.getBufferView(image.bufferView);
    }

    const preloadedImage = this.images[index];

    if (preloadedImage) {
      image.image = preloadedImage;
    }

    return image;
  }

  _resolveBufferView(bufferView, index) {
    const bufferIndex = bufferView.buffer;
    const result = {
      id: "bufferView-".concat(index),
      ...bufferView,
      buffer: this.buffers[bufferIndex]
    };
    const arrayBuffer = this.buffers[bufferIndex].arrayBuffer;
    let byteOffset = this.buffers[bufferIndex].byteOffset || 0;

    if ('byteOffset' in bufferView) {
      byteOffset += bufferView.byteOffset;
    }

    result.data = new Uint8Array(arrayBuffer, byteOffset, bufferView.byteLength);
    return result;
  }

  _resolveCamera(camera, index) {
    camera.id = camera.id || "camera-".concat(index);

    if (camera.perspective) ;

    if (camera.orthographic) ;

    return camera;
  }

}

function postProcessGLTF(gltf, options) {
  return new GLTFPostProcessor().postProcess(gltf, options);
}

const MAGIC_glTF = 0x676c5446;
const GLB_FILE_HEADER_SIZE = 12;
const GLB_CHUNK_HEADER_SIZE = 8;
const GLB_CHUNK_TYPE_JSON = 0x4e4f534a;
const GLB_CHUNK_TYPE_BIN = 0x004e4942;
const GLB_CHUNK_TYPE_JSON_XVIZ_DEPRECATED = 0;
const GLB_CHUNK_TYPE_BIX_XVIZ_DEPRECATED = 1;
const GLB_V1_CONTENT_FORMAT_JSON = 0x0;
const LE = true;

function getMagicString(dataView, byteOffset = 0) {
  return "".concat(String.fromCharCode(dataView.getUint8(byteOffset + 0))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 1))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 2))).concat(String.fromCharCode(dataView.getUint8(byteOffset + 3)));
}

function isGLB(arrayBuffer, byteOffset = 0, options = {}) {
  const dataView = new DataView(arrayBuffer);
  const {
    magic = MAGIC_glTF
  } = options;
  const magic1 = dataView.getUint32(byteOffset, false);
  return magic1 === magic || magic1 === MAGIC_glTF;
}
function parseGLBSync(glb, arrayBuffer, byteOffset = 0, options = {}) {
  const dataView = new DataView(arrayBuffer);
  const type = getMagicString(dataView, byteOffset + 0);
  const version = dataView.getUint32(byteOffset + 4, LE);
  const byteLength = dataView.getUint32(byteOffset + 8, LE);
  Object.assign(glb, {
    header: {
      byteOffset,
      byteLength,
      hasBinChunk: false
    },
    type,
    version,
    json: {},
    binChunks: []
  });
  byteOffset += GLB_FILE_HEADER_SIZE;

  switch (glb.version) {
    case 1:
      return parseGLBV1(glb, dataView, byteOffset);

    case 2:
      return parseGLBV2(glb, dataView, byteOffset, options = {});

    default:
      throw new Error("Invalid GLB version ".concat(glb.version, ". Only supports v1 and v2."));
  }
}

function parseGLBV1(glb, dataView, byteOffset) {
  assert$7(glb.header.byteLength > GLB_FILE_HEADER_SIZE + GLB_CHUNK_HEADER_SIZE);
  const contentLength = dataView.getUint32(byteOffset + 0, LE);
  const contentFormat = dataView.getUint32(byteOffset + 4, LE);
  byteOffset += GLB_CHUNK_HEADER_SIZE;
  assert$7(contentFormat === GLB_V1_CONTENT_FORMAT_JSON);
  parseJSONChunk(glb, dataView, byteOffset, contentLength);
  byteOffset += contentLength;
  byteOffset += parseBINChunk(glb, dataView, byteOffset, glb.header.byteLength);
  return byteOffset;
}

function parseGLBV2(glb, dataView, byteOffset, options) {
  assert$7(glb.header.byteLength > GLB_FILE_HEADER_SIZE + GLB_CHUNK_HEADER_SIZE);
  parseGLBChunksSync(glb, dataView, byteOffset, options);
  return byteOffset + glb.header.byteLength;
}

function parseGLBChunksSync(glb, dataView, byteOffset, options) {
  while (byteOffset + 8 <= glb.header.byteLength) {
    const chunkLength = dataView.getUint32(byteOffset + 0, LE);
    const chunkFormat = dataView.getUint32(byteOffset + 4, LE);
    byteOffset += GLB_CHUNK_HEADER_SIZE;

    switch (chunkFormat) {
      case GLB_CHUNK_TYPE_JSON:
        parseJSONChunk(glb, dataView, byteOffset, chunkLength);
        break;

      case GLB_CHUNK_TYPE_BIN:
        parseBINChunk(glb, dataView, byteOffset, chunkLength);
        break;

      case GLB_CHUNK_TYPE_JSON_XVIZ_DEPRECATED:
        if (!options.strict) {
          parseJSONChunk(glb, dataView, byteOffset, chunkLength);
        }

        break;

      case GLB_CHUNK_TYPE_BIX_XVIZ_DEPRECATED:
        if (!options.strict) {
          parseBINChunk(glb, dataView, byteOffset, chunkLength);
        }

        break;
    }

    byteOffset += padToNBytes(chunkLength, 4);
  }

  return byteOffset;
}

function parseJSONChunk(glb, dataView, byteOffset, chunkLength) {
  const jsonChunk = new Uint8Array(dataView.buffer, byteOffset, chunkLength);
  const textDecoder = new TextDecoder('utf8');
  const jsonText = textDecoder.decode(jsonChunk);
  glb.json = JSON.parse(jsonText);
  return padToNBytes(chunkLength, 4);
}

function parseBINChunk(glb, dataView, byteOffset, chunkLength) {
  glb.header.hasBinChunk = true;
  glb.binChunks.push({
    byteOffset,
    byteLength: chunkLength,
    arrayBuffer: dataView.buffer
  });
  return padToNBytes(chunkLength, 4);
}

async function parseGLTF(gltf, arrayBufferOrString, byteOffset = 0, options, context) {
  var _options$gltf, _options$gltf2, _options$gltf3, _options$gltf4;

  parseGLTFContainerSync(gltf, arrayBufferOrString, byteOffset, options);
  normalizeGLTFV1(gltf, {
    normalize: options === null || options === void 0 ? void 0 : (_options$gltf = options.gltf) === null || _options$gltf === void 0 ? void 0 : _options$gltf.normalize
  });
  preprocessExtensions(gltf, options, context);
  const promises = [];

  if (options !== null && options !== void 0 && (_options$gltf2 = options.gltf) !== null && _options$gltf2 !== void 0 && _options$gltf2.loadBuffers && gltf.json.buffers) {
    await loadBuffers(gltf, options, context);
  }

  if (options !== null && options !== void 0 && (_options$gltf3 = options.gltf) !== null && _options$gltf3 !== void 0 && _options$gltf3.loadImages) {
    const promise = loadImages(gltf, options, context);
    promises.push(promise);
  }

  const promise = decodeExtensions(gltf, options, context);
  promises.push(promise);
  await Promise.all(promises);
  return options !== null && options !== void 0 && (_options$gltf4 = options.gltf) !== null && _options$gltf4 !== void 0 && _options$gltf4.postProcess ? postProcessGLTF(gltf, options) : gltf;
}

function parseGLTFContainerSync(gltf, data, byteOffset, options) {
  if (options.uri) {
    gltf.baseUri = options.uri;
  }

  if (data instanceof ArrayBuffer && !isGLB(data, byteOffset, options)) {
    const textDecoder = new TextDecoder();
    data = textDecoder.decode(data);
  }

  if (typeof data === 'string') {
    gltf.json = parseJSON(data);
  } else if (data instanceof ArrayBuffer) {
    const glb = {};
    byteOffset = parseGLBSync(glb, data, byteOffset, options.glb);
    assert$1(glb.type === 'glTF', "Invalid GLB magic string ".concat(glb.type));
    gltf._glb = glb;
    gltf.json = glb.json;
  } else {
    assert$1(false, 'GLTF: must be ArrayBuffer or string');
  }

  const buffers = gltf.json.buffers || [];
  gltf.buffers = new Array(buffers.length).fill(null);

  if (gltf._glb && gltf._glb.header.hasBinChunk) {
    const {
      binChunks
    } = gltf._glb;
    gltf.buffers[0] = {
      arrayBuffer: binChunks[0].arrayBuffer,
      byteOffset: binChunks[0].byteOffset,
      byteLength: binChunks[0].byteLength
    };
  }

  const images = gltf.json.images || [];
  gltf.images = new Array(images.length).fill({});
}

async function loadBuffers(gltf, options, context) {
  const buffers = gltf.json.buffers || [];

  for (let i = 0; i < buffers.length; ++i) {
    const buffer = buffers[i];

    if (buffer.uri) {
      var _context$fetch, _response$arrayBuffer;

      const {
        fetch
      } = context;
      assert$1(fetch);
      const uri = resolveUrl(buffer.uri, options);
      const response = await (context === null || context === void 0 ? void 0 : (_context$fetch = context.fetch) === null || _context$fetch === void 0 ? void 0 : _context$fetch.call(context, uri));
      const arrayBuffer = await (response === null || response === void 0 ? void 0 : (_response$arrayBuffer = response.arrayBuffer) === null || _response$arrayBuffer === void 0 ? void 0 : _response$arrayBuffer.call(response));
      gltf.buffers[i] = {
        arrayBuffer,
        byteOffset: 0,
        byteLength: arrayBuffer.byteLength
      };
      delete buffer.uri;
    } else if (gltf.buffers[i] === null) {
      gltf.buffers[i] = {
        arrayBuffer: new ArrayBuffer(buffer.byteLength),
        byteOffset: 0,
        byteLength: buffer.byteLength
      };
    }
  }
}

async function loadImages(gltf, options, context) {
  const imageIndices = getReferencesImageIndices(gltf);
  const images = gltf.json.images || [];
  const promises = [];

  for (const imageIndex of imageIndices) {
    promises.push(loadImage(gltf, images[imageIndex], imageIndex, options, context));
  }

  return await Promise.all(promises);
}

function getReferencesImageIndices(gltf) {
  const imageIndices = new Set();
  const textures = gltf.json.textures || [];

  for (const texture of textures) {
    if (texture.source !== undefined) {
      imageIndices.add(texture.source);
    }
  }

  return Array.from(imageIndices).sort();
}

async function loadImage(gltf, image, index, options, context) {
  const {
    fetch,
    parse
  } = context;
  let arrayBuffer;

  if (image.uri && !image.hasOwnProperty('bufferView')) {
    const uri = resolveUrl(image.uri, options);
    const response = await fetch(uri);
    arrayBuffer = await response.arrayBuffer();
  }

  if (Number.isFinite(image.bufferView)) {
    const array = getTypedArrayForBufferView(gltf.json, gltf.buffers, image.bufferView);
    arrayBuffer = sliceArrayBuffer(array.buffer, array.byteOffset, array.byteLength);
  }

  assert$1(arrayBuffer, 'glTF image has no data');
  let parsedImage = await parse(arrayBuffer, [ImageLoader, BasisLoader], {
    mimeType: image.mimeType,
    basis: options.basis || {
      format: selectSupportedBasisFormat()
    }
  }, context);

  if (parsedImage && parsedImage[0]) {
    parsedImage = {
      compressed: true,
      mipmaps: false,
      width: parsedImage[0].width,
      height: parsedImage[0].height,
      data: parsedImage[0]
    };
  }

  gltf.images = gltf.images || [];
  gltf.images[index] = parsedImage;
}

const GLTFLoader$1 = {
  name: 'glTF',
  id: 'gltf',
  module: 'gltf',
  version: VERSION$3,
  extensions: ['gltf', 'glb'],
  mimeTypes: ['model/gltf+json', 'model/gltf-binary'],
  text: true,
  binary: true,
  tests: ['glTF'],
  parse: parse$1,
  options: {
    gltf: {
      normalize: true,
      loadBuffers: true,
      loadImages: true,
      decompressMeshes: true,
      postProcess: true
    },
    log: console
  },
  deprecatedOptions: {
    fetchImages: 'gltf.loadImages',
    createImages: 'gltf.loadImages',
    decompress: 'gltf.decompressMeshes',
    postProcess: 'gltf.postProcess',
    gltf: {
      decompress: 'gltf.decompressMeshes'
    }
  }
};
async function parse$1(arrayBuffer, options = {}, context) {
  options = { ...GLTFLoader$1.options,
    ...options
  };
  options.gltf = { ...GLTFLoader$1.options.gltf,
    ...options.gltf
  };
  const {
    byteOffset = 0
  } = options;
  const gltf = {};
  return await parseGLTF(gltf, arrayBuffer, byteOffset, options, context);
}

const GLTF_FORMAT = {
  URI: 0,
  EMBEDDED: 1
};
function parse3DTileGLTFViewSync(tile, arrayBuffer, byteOffset, options) {
  tile.rotateYtoZ = true;
  const gltfByteLength = tile.byteOffset + tile.byteLength - byteOffset;

  if (gltfByteLength === 0) {
    throw new Error('glTF byte length must be greater than 0.');
  }

  tile.gltfUpAxis = options['3d-tiles'] && options['3d-tiles'].assetGltfUpAxis ? options['3d-tiles'].assetGltfUpAxis : 'Y';
  tile.gltfArrayBuffer = sliceArrayBuffer(arrayBuffer, byteOffset, gltfByteLength);
  tile.gltfByteOffset = 0;
  tile.gltfByteLength = gltfByteLength;

  if (byteOffset % 4 === 0) ; else {
    console.warn("".concat(tile.type, ": embedded glb is not aligned to a 4-byte boundary."));
  }

  return tile.byteOffset + tile.byteLength;
}
async function extractGLTF(tile, gltfFormat, options, context) {
  const tile3DOptions = options['3d-tiles'] || {};
  extractGLTFBufferOrURL(tile, gltfFormat);

  if (tile3DOptions.loadGLTF) {
    const {
      parse,
      fetch
    } = context;

    if (tile.gltfUrl) {
      tile.gltfArrayBuffer = await fetch(tile.gltfUrl, options);
      tile.gltfByteOffset = 0;
    }

    if (tile.gltfArrayBuffer) {
      tile.gltf = await parse(tile.gltfArrayBuffer, GLTFLoader$1, options, context);
      delete tile.gltfArrayBuffer;
      delete tile.gltfByteOffset;
      delete tile.gltfByteLength;
    }
  }
}

function extractGLTFBufferOrURL(tile, gltfFormat, options) {
  switch (gltfFormat) {
    case GLTF_FORMAT.URI:
      const gltfUrlBytes = new Uint8Array(tile.gltfArrayBuffer, tile.gltfByteOffset);
      const textDecoder = new TextDecoder();
      const gltfUrl = textDecoder.decode(gltfUrlBytes);
      tile.gltfUrl = gltfUrl.replace(/[\s\0]+$/, '');
      delete tile.gltfArrayBuffer;
      delete tile.gltfByteOffset;
      delete tile.gltfByteLength;
      break;

    case GLTF_FORMAT.EMBEDDED:
      break;

    default:
      throw new Error('b3dm: Illegal glTF format field');
  }
}

async function parseBatchedModel3DTile(tile, arrayBuffer, byteOffset, options, context) {
  var _tile$gltf;

  byteOffset = parseBatchedModel(tile, arrayBuffer, byteOffset, options);
  await extractGLTF(tile, GLTF_FORMAT.EMBEDDED, options, context);
  const extensions = tile === null || tile === void 0 ? void 0 : (_tile$gltf = tile.gltf) === null || _tile$gltf === void 0 ? void 0 : _tile$gltf.extensions;

  if (extensions && extensions.CESIUM_RTC) {
    tile.rtcCenter = extensions.CESIUM_RTC.center;
  }

  return byteOffset;
}

function parseBatchedModel(tile, arrayBuffer, byteOffset, options, context) {
  byteOffset = parse3DTileHeaderSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileTablesHeaderSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileTablesSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileGLTFViewSync(tile, arrayBuffer, byteOffset, options);
  const featureTable = new Tile3DFeatureTable(tile.featureTableJson, tile.featureTableBinary);
  tile.rtcCenter = featureTable.getGlobalProperty('RTC_CENTER', GL$1.FLOAT, 3);
  return byteOffset;
}

async function parseInstancedModel3DTile(tile, arrayBuffer, byteOffset, options, context) {
  byteOffset = parseInstancedModel(tile, arrayBuffer, byteOffset, options);
  await extractGLTF(tile, tile.gltfFormat, options, context);
  return byteOffset;
}

function parseInstancedModel(tile, arrayBuffer, byteOffset, options, context) {
  byteOffset = parse3DTileHeaderSync(tile, arrayBuffer, byteOffset);

  if (tile.version !== 1) {
    throw new Error("Instanced 3D Model version ".concat(tile.version, " is not supported"));
  }

  byteOffset = parse3DTileTablesHeaderSync(tile, arrayBuffer, byteOffset);
  const view = new DataView(arrayBuffer);
  tile.gltfFormat = view.getUint32(byteOffset, true);
  byteOffset += 4;
  byteOffset = parse3DTileTablesSync(tile, arrayBuffer, byteOffset);
  byteOffset = parse3DTileGLTFViewSync(tile, arrayBuffer, byteOffset, options);

  if (tile.featureTableJsonByteLength === 0) {
    throw new Error('i3dm parser: featureTableJsonByteLength is zero.');
  }

  const featureTable = new Tile3DFeatureTable(tile.featureTableJson, tile.featureTableBinary);
  const instancesLength = featureTable.getGlobalProperty('INSTANCES_LENGTH');
  featureTable.featuresLength = instancesLength;

  if (!Number.isFinite(instancesLength)) {
    throw new Error('i3dm parser: INSTANCES_LENGTH must be defined');
  }

  tile.eastNorthUp = featureTable.getGlobalProperty('EAST_NORTH_UP');
  tile.rtcCenter = featureTable.getGlobalProperty('RTC_CENTER', GL$1.FLOAT, 3);
  const batchTable = new Tile3DBatchTableParser(tile.batchTableJson, tile.batchTableBinary, instancesLength);
  extractInstancedAttributes(tile, featureTable, batchTable, instancesLength);
  return byteOffset;
}

function extractInstancedAttributes(tile, featureTable, batchTable, instancesLength) {
  const collectionOptions = {
    instances: new Array(instancesLength),
    batchTable: tile._batchTable,
    cull: false,
    url: undefined,
    gltf: undefined,
    basePath: undefined,
    incrementallyLoadTextures: false,
    forwardAxis: [1, 0, 0]
  };
  const instances = collectionOptions.instances;
  const instancePosition = new Vector3();
  new Vector3();
  new Vector3();
  new Vector3();
  const instanceRotation = new Matrix3();
  const instanceQuaternion = new Quaternion();
  const instanceScale = new Vector3();
  const instanceTranslationRotationScale = {};
  const instanceTransform = new Matrix4();
  const scratch1 = [];
  const scratch2 = [];
  const scratchVector1 = new Vector3();
  const scratchVector2 = new Vector3();

  for (let i = 0; i < instancesLength; i++) {
    let position;

    if (featureTable.hasProperty('POSITION')) {
      position = featureTable.getProperty('POSITION', GL$1.FLOAT, 3, i, instancePosition);
    } else if (featureTable.hasProperty('POSITION_QUANTIZED')) {
      position = featureTable.getProperty('POSITION_QUANTIZED', GL$1.UNSIGNED_SHORT, 3, i, instancePosition);
      const quantizedVolumeOffset = featureTable.getGlobalProperty('QUANTIZED_VOLUME_OFFSET', GL$1.FLOAT, 3, scratchVector1);

      if (!quantizedVolumeOffset) {
        throw new Error('i3dm parser: QUANTIZED_VOLUME_OFFSET must be defined for quantized positions.');
      }

      const quantizedVolumeScale = featureTable.getGlobalProperty('QUANTIZED_VOLUME_SCALE', GL$1.FLOAT, 3, scratchVector2);

      if (!quantizedVolumeScale) {
        throw new Error('i3dm parser: QUANTIZED_VOLUME_SCALE must be defined for quantized positions.');
      }

      const MAX_UNSIGNED_SHORT = 65535.0;

      for (let j = 0; j < 3; j++) {
        position[j] = position[j] / MAX_UNSIGNED_SHORT * quantizedVolumeScale[j] + quantizedVolumeOffset[j];
      }
    }

    if (!position) {
      throw new Error('i3dm: POSITION or POSITION_QUANTIZED must be defined for each instance.');
    }

    instancePosition.copy(position);
    instanceTranslationRotationScale.translation = instancePosition;
    tile.normalUp = featureTable.getProperty('NORMAL_UP', GL$1.FLOAT, 3, i, scratch1);
    tile.normalRight = featureTable.getProperty('NORMAL_RIGHT', GL$1.FLOAT, 3, i, scratch2);

    if (tile.normalUp) {
      if (!tile.normalRight) {
        throw new Error('i3dm: Custom orientation requires both NORMAL_UP and NORMAL_RIGHT.');
      }

      tile.hasCustomOrientation = true;
    } else {
      tile.octNormalUp = featureTable.getProperty('NORMAL_UP_OCT32P', GL$1.UNSIGNED_SHORT, 2, scratch1);
      tile.octNormalRight = featureTable.getProperty('NORMAL_RIGHT_OCT32P', GL$1.UNSIGNED_SHORT, 2, scratch2);

      if (tile.octNormalUp) {
        if (!tile.octNormalRight) {
          throw new Error('i3dm: oct-encoded orientation requires NORMAL_UP_OCT32P and NORMAL_RIGHT_OCT32P');
        }

        throw new Error('i3dm: oct-encoded orientation not implemented');
      } else if (tile.eastNorthUp) {
        Ellipsoid.WGS84.eastNorthUpToFixedFrame(instancePosition, instanceTransform);
        instanceTransform.getRotationMatrix3(instanceRotation);
      } else {
        instanceRotation.identity();
      }
    }

    instanceQuaternion.fromMatrix3(instanceRotation);
    instanceTranslationRotationScale.rotation = instanceQuaternion;
    instanceScale.set(1.0, 1.0, 1.0);
    const scale = featureTable.getProperty('SCALE', GL$1.FLOAT, 1, i);

    if (Number.isFinite(scale)) {
      instanceScale.multiplyByScalar(scale);
    }

    const nonUniformScale = featureTable.getProperty('SCALE_NON_UNIFORM', GL$1.FLOAT, 3, i, scratch1);

    if (nonUniformScale) {
      instanceScale.scale(nonUniformScale);
    }

    instanceTranslationRotationScale.scale = instanceScale;
    let batchId = featureTable.getProperty('BATCH_ID', GL$1.UNSIGNED_SHORT, 1, i);

    if (batchId === undefined) {
      batchId = i;
    }

    const rotationMatrix = new Matrix4().fromQuaternion(instanceTranslationRotationScale.rotation);
    instanceTransform.identity();
    instanceTransform.translate(instanceTranslationRotationScale.translation);
    instanceTransform.multiplyRight(rotationMatrix);
    instanceTransform.scale(instanceTranslationRotationScale.scale);
    const modelMatrix = instanceTransform.clone();
    instances[i] = {
      modelMatrix,
      batchId
    };
  }

  tile.instances = instances;
}

async function parseComposite3DTile(tile, arrayBuffer, byteOffset, options, context, parse3DTile) {
  byteOffset = parse3DTileHeaderSync(tile, arrayBuffer, byteOffset);
  const view = new DataView(arrayBuffer);
  tile.tilesLength = view.getUint32(byteOffset, true);
  byteOffset += 4;
  tile.tiles = [];

  while (tile.tiles.length < tile.tilesLength && tile.byteLength - byteOffset > 12) {
    const subtile = {};
    tile.tiles.push(subtile);
    byteOffset = await parse3DTile(arrayBuffer, byteOffset, options, context, subtile);
  }

  return byteOffset;
}

async function parseGltf3DTile(tile, arrayBuffer, options, context) {
  tile.rotateYtoZ = true;
  tile.gltfUpAxis = options['3d-tiles'] && options['3d-tiles'].assetGltfUpAxis ? options['3d-tiles'].assetGltfUpAxis : 'Y';
  const {
    parse
  } = context;
  tile.gltf = await parse(arrayBuffer, GLTFLoader$1, options, context);
}

async function parse3DTile(arrayBuffer, byteOffset = 0, options, context, tile = {}) {
  tile.byteOffset = byteOffset;
  tile.type = getMagicString$1(arrayBuffer, byteOffset);

  switch (tile.type) {
    case TILE3D_TYPE.COMPOSITE:
      return await parseComposite3DTile(tile, arrayBuffer, byteOffset, options, context, parse3DTile);

    case TILE3D_TYPE.BATCHED_3D_MODEL:
      return await parseBatchedModel3DTile(tile, arrayBuffer, byteOffset, options, context);

    case TILE3D_TYPE.GLTF:
      return await parseGltf3DTile(tile, arrayBuffer, options, context);

    case TILE3D_TYPE.INSTANCED_3D_MODEL:
      return await parseInstancedModel3DTile(tile, arrayBuffer, byteOffset, options, context);

    case TILE3D_TYPE.POINT_CLOUD:
      return await parsePointCloud3DTile(tile, arrayBuffer, byteOffset, options, context);

    default:
      throw new Error("3DTileLoader: unknown type ".concat(tile.type));
  }
}

const SUBTREE_FILE_MAGIC = 0x74627573;
const SUBTREE_FILE_VERSION = 1;
async function parse3DTilesSubtree(data) {
  const magic = new Uint32Array(data.slice(0, 4));

  if (magic[0] !== SUBTREE_FILE_MAGIC) {
    throw new Error('Wrong subtree file magic number');
  }

  const version = new Uint32Array(data.slice(4, 8));

  if (version[0] !== SUBTREE_FILE_VERSION) {
    throw new Error('Wrong subtree file verson, must be 1');
  }

  const jsonByteLength = parseUint64Value(data.slice(8, 16));
  const stringAttribute = new Uint8Array(data, 24, jsonByteLength);
  const textDecoder = new TextDecoder('utf8');
  const string = textDecoder.decode(stringAttribute);
  const subtree = JSON.parse(string);
  const binaryByteLength = parseUint64Value(data.slice(16, 24));
  let internalBinaryBuffer = new ArrayBuffer(0);

  if (binaryByteLength) {
    internalBinaryBuffer = data.slice(24 + jsonByteLength);
  }

  if ('bufferView' in subtree.tileAvailability) {
    subtree.tileAvailability.explicitBitstream = await getExplicitBitstream(subtree, 'tileAvailability', internalBinaryBuffer);
  }

  if ('bufferView' in subtree.contentAvailability) {
    subtree.contentAvailability.explicitBitstream = await getExplicitBitstream(subtree, 'contentAvailability', internalBinaryBuffer);
  }

  if ('bufferView' in subtree.childSubtreeAvailability) {
    subtree.childSubtreeAvailability.explicitBitstream = await getExplicitBitstream(subtree, 'childSubtreeAvailability', internalBinaryBuffer);
  }

  return subtree;
}

async function getExplicitBitstream(subtree, name, internalBinaryBuffer) {
  const bufferViewIndex = subtree[name].bufferView;
  const bufferView = subtree.bufferViews[bufferViewIndex];
  const buffer = subtree.buffers[bufferView.buffer];

  if (buffer.uri) {
    const response = await fetchFile(buffer.uri);
    const data = await response.arrayBuffer();
    return new Uint8Array(data, bufferView.byteOffset, bufferView.byteLength);
  }

  return new Uint8Array(internalBinaryBuffer, bufferView.byteOffset, bufferView.byteLength);
}

function parseUint64Value(buffer) {
  const dataView = new DataView(buffer);
  const left = dataView.getUint32(0, true);
  const right = dataView.getUint32(4, true);
  return left + 2 ** 32 * right;
}

const Tile3DSubtreeLoader = {
  id: '3d-tiles-subtree',
  name: '3D Tiles Subtree',
  module: '3d-tiles',
  version: VERSION$5,
  extensions: ['subtree'],
  mimeTypes: ['application/octet-stream'],
  tests: ['subtree'],
  parse: parse3DTilesSubtree,
  options: {}
};

const QUADTREE_DEVISION_COUNT = 4;
const OCTREE_DEVISION_COUNT = 8;
const SUBDIVISION_COUNT_MAP = {
  QUADTREE: QUADTREE_DEVISION_COUNT,
  OCTREE: OCTREE_DEVISION_COUNT
};
async function parseImplicitTiles(params) {
  const {
    options,
    parentData = {
      mortonIndex: 0,
      x: 0,
      y: 0,
      z: 0
    },
    childIndex = 0,
    globalData = {
      level: 0,
      mortonIndex: 0,
      x: 0,
      y: 0,
      z: 0
    }
  } = params;
  let {
    subtree,
    level = 0
  } = params;
  const {
    subdivisionScheme,
    subtreeLevels,
    maximumLevel,
    contentUrlTemplate,
    subtreesUriTemplate,
    basePath
  } = options;
  const tile = {
    children: [],
    lodMetricValue: 0,
    contentUrl: ''
  };
  const childrenPerTile = SUBDIVISION_COUNT_MAP[subdivisionScheme];
  const childX = childIndex & 0b01;
  const childY = childIndex >> 1 & 0b01;
  const childZ = childIndex >> 2 & 0b01;
  const levelOffset = (childrenPerTile ** level - 1) / (childrenPerTile - 1);
  let childTileMortonIndex = concatBits(parentData.mortonIndex, childIndex);
  let tileAvailabilityIndex = levelOffset + childTileMortonIndex;
  let childTileX = concatBits(parentData.x, childX);
  let childTileY = concatBits(parentData.y, childY);
  let childTileZ = concatBits(parentData.z, childZ);
  let isChildSubtreeAvailable = false;

  if (level + 1 > subtreeLevels) {
    isChildSubtreeAvailable = getAvailabilityResult(subtree.childSubtreeAvailability, childTileMortonIndex);
  }

  const x = concatBits(globalData.x, childTileX);
  const y = concatBits(globalData.y, childTileY);
  const z = concatBits(globalData.z, childTileZ);
  const lev = level + globalData.level;

  if (isChildSubtreeAvailable) {
    const subtreePath = "".concat(basePath, "/").concat(subtreesUriTemplate);
    const childSubtreeUrl = replaceContentUrlTemplate(subtreePath, lev, x, y, z);
    const childSubtree = await load(childSubtreeUrl, Tile3DSubtreeLoader);
    subtree = childSubtree;
    globalData.mortonIndex = childTileMortonIndex;
    globalData.x = childTileX;
    globalData.y = childTileY;
    globalData.z = childTileZ;
    globalData.level = level;
    childTileMortonIndex = 0;
    tileAvailabilityIndex = 0;
    childTileX = 0;
    childTileY = 0;
    childTileZ = 0;
    level = 0;
  }

  const isTileAvailable = getAvailabilityResult(subtree.tileAvailability, tileAvailabilityIndex);

  if (!isTileAvailable || level > maximumLevel) {
    return tile;
  }

  const isContentAvailable = getAvailabilityResult(subtree.contentAvailability, tileAvailabilityIndex);

  if (isContentAvailable) {
    tile.contentUrl = replaceContentUrlTemplate(contentUrlTemplate, lev, x, y, z);
  }

  const childTileLevel = level + 1;
  const pData = {
    mortonIndex: childTileMortonIndex,
    x: childTileX,
    y: childTileY,
    z: childTileZ
  };

  for (let index = 0; index < childrenPerTile; index++) {
    const currentTile = await parseImplicitTiles({
      subtree,
      options,
      parentData: pData,
      childIndex: index,
      level: childTileLevel,
      globalData
    });

    if (currentTile.contentUrl || currentTile.children.length) {
      const globalLevel = lev + 1;
      const childCoordinates = {
        childTileX,
        childTileY,
        childTileZ
      };
      const formattedTile = formatTileData(currentTile, globalLevel, childCoordinates, options);
      tile.children.push(formattedTile);
    }
  }

  return tile;
}

function getAvailabilityResult(availabilityData, index) {
  if ('constant' in availabilityData) {
    return Boolean(availabilityData.constant);
  }

  if (availabilityData.explicitBitstream) {
    return getBooleanValueFromBitstream(index, availabilityData.explicitBitstream);
  }

  return false;
}

function formatTileData(tile, level, childCoordinates, options) {
  const {
    basePath,
    refine,
    getRefine,
    lodMetricType,
    getTileType,
    rootLodMetricValue,
    rootBoundingVolume
  } = options;
  const uri = tile.contentUrl && tile.contentUrl.replace("".concat(basePath, "/"), '');
  const lodMetricValue = rootLodMetricValue / 2 ** level;
  const boundingVolume = calculateBoundingVolumeForChildTile(level, rootBoundingVolume, childCoordinates);
  return {
    children: tile.children,
    contentUrl: tile.contentUrl,
    content: {
      uri
    },
    id: tile.contentUrl,
    refine: getRefine(refine),
    type: getTileType(tile),
    lodMetricType,
    lodMetricValue,
    boundingVolume
  };
}

function calculateBoundingVolumeForChildTile(level, rootBoundingVolume, childCoordinates) {
  if (rootBoundingVolume.region) {
    const {
      childTileX,
      childTileY,
      childTileZ
    } = childCoordinates;
    const [west, south, east, north, minimumHeight, maximumHeight] = rootBoundingVolume.region;
    const boundingVolumesCount = 2 ** level;
    const sizeX = (east - west) / boundingVolumesCount;
    const sizeY = (north - south) / boundingVolumesCount;
    const sizeZ = (maximumHeight - minimumHeight) / boundingVolumesCount;
    const [childWest, childEast] = [west + sizeX * childTileX, west + sizeX * (childTileX + 1)];
    const [childSouth, childNorth] = [south + sizeY * childTileY, south + sizeY * (childTileY + 1)];
    const [childMinimumHeight, childMaximumHeight] = [minimumHeight + sizeZ * childTileZ, minimumHeight + sizeZ * (childTileZ + 1)];
    return {
      region: [childWest, childSouth, childEast, childNorth, childMinimumHeight, childMaximumHeight]
    };
  }

  console.warn('Unsupported bounding volume type: ', rootBoundingVolume);
  return null;
}

function concatBits(first, second) {
  return parseInt(first.toString(2) + second.toString(2), 2);
}

function replaceContentUrlTemplate(templateUrl, level, x, y, z) {
  const mapUrl = generateMapUrl({
    level,
    x,
    y,
    z
  });
  return templateUrl.replace(/{level}|{x}|{y}|{z}/gi, matched => mapUrl[matched]);
}

function generateMapUrl(items) {
  const mapUrl = {};

  for (const key in items) {
    mapUrl["{".concat(key, "}")] = items[key];
  }

  return mapUrl;
}

function getBooleanValueFromBitstream(availabilityIndex, availabilityBuffer) {
  const byteIndex = Math.floor(availabilityIndex / 8);
  const bitIndex = availabilityIndex % 8;
  const bitValue = availabilityBuffer[byteIndex] >> bitIndex & 1;
  return bitValue === 1;
}

function getTileType(tile) {
  if (!tile.contentUrl) {
    return TILE_TYPE.EMPTY;
  }

  const contentUrl = tile.contentUrl;
  const fileExtension = contentUrl.split('.').pop();

  switch (fileExtension) {
    case 'pnts':
      return TILE_TYPE.POINTCLOUD;

    case 'i3dm':
    case 'b3dm':
    case 'glb':
    case 'gltf':
      return TILE_TYPE.SCENEGRAPH;

    default:
      return fileExtension;
  }
}

function getRefine(refine) {
  switch (refine) {
    case 'REPLACE':
    case 'replace':
      return TILE_REFINEMENT.REPLACE;

    case 'ADD':
    case 'add':
      return TILE_REFINEMENT.ADD;

    default:
      return refine;
  }
}

function resolveUri(uri, basePath) {
  const urlSchemeRegex = /^[a-z][0-9a-z+.-]*:/i;

  if (urlSchemeRegex.test(basePath)) {
    const url = new URL(uri, "".concat(basePath, "/"));
    return decodeURI(url.toString());
  } else if (uri.startsWith('/')) {
    return uri;
  }

  return "".concat(basePath, "/").concat(uri);
}

function normalizeTileData(tile, options) {
  if (!tile) {
    return null;
  }

  if (tile.content) {
    const contentUri = tile.content.uri || tile.content.url;
    tile.contentUrl = resolveUri(contentUri, options.basePath);
  }

  tile.id = tile.contentUrl;
  tile.lodMetricType = LOD_METRIC_TYPE.GEOMETRIC_ERROR;
  tile.lodMetricValue = tile.geometricError;
  tile.transformMatrix = tile.transform;
  tile.type = getTileType(tile);
  tile.refine = getRefine(tile.refine);
  return tile;
}
function normalizeTileHeaders(tileset) {
  const basePath = tileset.basePath;
  const root = normalizeTileData(tileset.root, tileset);
  const stack = [];
  stack.push(root);

  while (stack.length > 0) {
    const tile = stack.pop() || {};
    const children = tile.children || [];

    for (const childHeader of children) {
      normalizeTileData(childHeader, {
        basePath
      });
      stack.push(childHeader);
    }
  }

  return root;
}
async function normalizeImplicitTileHeaders(tileset) {
  if (!tileset.root) {
    return null;
  }

  const basePath = tileset.basePath;
  const implicitTilingExtension = tileset.root.extensions['3DTILES_implicit_tiling'];
  const {
    subdivisionScheme,
    maximumLevel,
    subtreeLevels,
    subtrees: {
      uri: subtreesUriTemplate
    }
  } = implicitTilingExtension;
  const subtreeUrl = replaceContentUrlTemplate(subtreesUriTemplate, 0, 0, 0, 0);
  const rootSubtreeUrl = resolveUri(subtreeUrl, basePath);
  const rootSubtree = await load(rootSubtreeUrl, Tile3DSubtreeLoader);
  const contentUrlTemplate = resolveUri(tileset.root.content.uri, basePath);
  const refine = tileset.root.refine;
  const rootLodMetricValue = tileset.root.geometricError;
  const rootBoundingVolume = tileset.root.boundingVolume;
  const options = {
    contentUrlTemplate,
    subtreesUriTemplate,
    subdivisionScheme,
    subtreeLevels,
    maximumLevel,
    refine,
    basePath,
    lodMetricType: LOD_METRIC_TYPE.GEOMETRIC_ERROR,
    rootLodMetricValue,
    rootBoundingVolume,
    getTileType,
    getRefine
  };
  return await normalizeImplicitTileData(tileset.root, rootSubtree, options);
}
async function normalizeImplicitTileData(tile, rootSubtree, options) {
  if (!tile) {
    return null;
  }

  tile.lodMetricType = LOD_METRIC_TYPE.GEOMETRIC_ERROR;
  tile.lodMetricValue = tile.geometricError;
  tile.transformMatrix = tile.transform;
  const {
    children,
    contentUrl
  } = await parseImplicitTiles({
    subtree: rootSubtree,
    options
  });

  if (contentUrl) {
    tile.contentUrl = contentUrl;
    tile.content = {
      uri: contentUrl.replace("".concat(options.basePath, "/"), '')
    };
  }

  tile.refine = getRefine(tile.refine);
  tile.type = getTileType(tile);
  tile.children = children;
  tile.id = tile.contentUrl;
  return tile;
}

const IMPLICIT_TILING_EXTENSION_NAME = '3DTILES_implicit_tiling';
const Tiles3DLoader = {
  id: '3d-tiles',
  name: '3D Tiles',
  module: '3d-tiles',
  version: VERSION$5,
  extensions: ['cmpt', 'pnts', 'b3dm', 'i3dm'],
  mimeTypes: ['application/octet-stream'],
  tests: ['cmpt', 'pnts', 'b3dm', 'i3dm'],
  parse,
  options: {
    '3d-tiles': {
      loadGLTF: true,
      decodeQuantizedPositions: false,
      isTileset: 'auto',
      assetGltfUpAxis: null
    }
  }
};

function getBaseUri(tileset) {
  return dirname(tileset.url);
}

async function parseTile(arrayBuffer, options, context) {
  const tile = {
    content: {
      featureIds: null
    }
  };
  const byteOffset = 0;
  await parse3DTile(arrayBuffer, byteOffset, options, context, tile.content);
  return tile.content;
}

async function parseTileset(data, options, context) {
  var _tilesetJson$root;

  const tilesetJson = JSON.parse(new TextDecoder().decode(data));
  tilesetJson.loader = options.loader || Tiles3DLoader;
  tilesetJson.url = context.url;
  tilesetJson.basePath = getBaseUri(tilesetJson);
  tilesetJson.root = hasImplicitTilingExtension(tilesetJson) ? await normalizeImplicitTileHeaders(tilesetJson) : normalizeTileHeaders(tilesetJson);
  tilesetJson.type = TILESET_TYPE.TILES3D;
  tilesetJson.lodMetricType = LOD_METRIC_TYPE.GEOMETRIC_ERROR;
  tilesetJson.lodMetricValue = ((_tilesetJson$root = tilesetJson.root) === null || _tilesetJson$root === void 0 ? void 0 : _tilesetJson$root.lodMetricValue) || 0;
  return tilesetJson;
}

async function parse(data, options, context) {
  const loaderOptions = options['3d-tiles'] || {};
  let isTileset;

  if (loaderOptions.isTileset === 'auto') {
    isTileset = context.url && context.url.indexOf('.json') !== -1;
  } else {
    isTileset = loaderOptions.isTileset;
  }

  if (isTileset) {
    data = await parseTileset(data, options, context);
  } else {
    data = await parseTile(data, options, context);
  }

  return data;
}

function hasImplicitTilingExtension(tilesetJson) {
  var _tilesetJson$extensio, _tilesetJson$extensio2;

  return (tilesetJson === null || tilesetJson === void 0 ? void 0 : (_tilesetJson$extensio = tilesetJson.extensionsRequired) === null || _tilesetJson$extensio === void 0 ? void 0 : _tilesetJson$extensio.includes(IMPLICIT_TILING_EXTENSION_NAME)) && (tilesetJson === null || tilesetJson === void 0 ? void 0 : (_tilesetJson$extensio2 = tilesetJson.extensionsUsed) === null || _tilesetJson$extensio2 === void 0 ? void 0 : _tilesetJson$extensio2.includes(IMPLICIT_TILING_EXTENSION_NAME));
}

const CESIUM_ION_URL = 'https://api.cesium.com/v1/assets';
async function getIonTilesetMetadata(accessToken, assetId) {
  if (!assetId) {
    const assets = await getIonAssets(accessToken);

    for (const item of assets.items) {
      if (item.type === '3DTILES') {
        assetId = item.id;
      }
    }
  }

  const ionAssetMetadata = await getIonAssetMetadata(accessToken, assetId);
  const {
    type,
    url
  } = ionAssetMetadata;
  assert$7(type === '3DTILES' && url);
  ionAssetMetadata.headers = {
    Authorization: "Bearer ".concat(ionAssetMetadata.accessToken)
  };
  return ionAssetMetadata;
}
async function getIonAssets(accessToken) {
  assert$7(accessToken);
  const url = CESIUM_ION_URL;
  const headers = {
    Authorization: "Bearer ".concat(accessToken)
  };
  const response = await fetchFile(url, {
    fetch: {
      headers
    }
  });

  if (!response.ok) {
    throw new Error(response.statusText);
  }

  return await response.json();
}
async function getIonAssetMetadata(accessToken, assetId) {
  assert$7(accessToken, assetId);
  const headers = {
    Authorization: "Bearer ".concat(accessToken)
  };
  const url = "".concat(CESIUM_ION_URL, "/").concat(assetId);
  let response = await fetchFile("".concat(url), {
    fetch: {
      headers
    }
  });

  if (!response.ok) {
    throw new Error(response.statusText);
  }

  let metadata = await response.json();
  response = await fetchFile("".concat(url, "/endpoint"), {
    fetch: {
      headers
    }
  });

  if (!response.ok) {
    throw new Error(response.statusText);
  }

  const tilesetInfo = await response.json();
  metadata = { ...metadata,
    ...tilesetInfo
  };
  return metadata;
}

async function preload(url, options = {}) {
  options = options['cesium-ion'] || {};
  const {
    accessToken
  } = options;
  let assetId = options.assetId;

  if (!Number.isFinite(assetId)) {
    const matched = url.match(/\/([0-9]+)\/tileset.json/);
    assetId = matched && matched[1];
  }

  return getIonTilesetMetadata(accessToken, assetId);
}

const CesiumIonLoader = { ...Tiles3DLoader,
  id: 'cesium-ion',
  name: 'Cesium Ion',
  preload,
  parse: async (data, options, context) => {
    options = { ...options
    };
    options['3d-tiles'] = options['cesium-ion'];
    options.loader = CesiumIonLoader;
    return Tiles3DLoader.parse(data, options, context);
  },
  options: {
    'cesium-ion': { ...Tiles3DLoader.options['3d-tiles'],
      accessToken: null
    }
  }
};

// From https://github.com/potree/potree/blob/master/src/materials/PointCloudMaterial.js
function generateGradientTexture(gradient) {
    const size = 64;
    // create canvas
    const canvas = document.createElement('canvas');
    canvas.width = size;
    canvas.height = size;
    // get context
    const context = canvas.getContext('2d');
    // draw gradient
    context.rect(0, 0, size, size);
    const ctxGradient = context.createLinearGradient(0, 0, size, size);
    for (let i = 0; i < gradient.length; i++) {
        const step = gradient[i];
        ctxGradient.addColorStop(step[0], '#' + step[1].getHexString());
    }
    context.fillStyle = ctxGradient;
    context.fill();
    //let texture = new THREE.Texture(canvas);
    const texture = new CanvasTexture(canvas);
    texture.needsUpdate = true;
    texture.minFilter = LinearFilter;
    texture.wrapS = RepeatWrapping;
    texture.wrapT = RepeatWrapping;
    texture.repeat.set(2, 2);
    // textureImage = texture.image;
    return texture;
}
function getCameraFrustum(camera) {
    camera.updateMatrix(); // make sure camera's local matrix is updated
    camera.updateMatrixWorld(); // make sure camera's world matrix is updated
    camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
    const frustum = new Frustum();
    frustum.setFromProjectionMatrix(new Matrix4$1().multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse));
    return frustum;
}
function loadersPlaneToMesh(plane) {
    const group = new Group();
    // Create a basic rectangle geometry from math.gl plane
    const planeGeometry = new PlaneGeometry(10, 5);
    // Align the geometry to the plane
    const coplanarPoint = new Vector3$1(...plane.projectPointOntoPlane([0, 0, 0]));
    const normal = new Vector3$1(plane.normal.x, plane.normal.y, plane.normal.z);
    const focalPoint = new Vector3$1().copy(coplanarPoint).add(normal);
    planeGeometry.lookAt(focalPoint);
    planeGeometry.translate(coplanarPoint.x, coplanarPoint.y, coplanarPoint.z);
    // Edges
    /*
    const edges = new EdgesGeometry(planeGeometry)
    var dispPlane = new LineSegments(edges, new LineBasicMaterial({ color: 0x00ffff }))*/
    //plane
    const material = new MeshBasicMaterial({ color: 0x00ffff, side: DoubleSide });
    const mesh = new Mesh(planeGeometry, material);
    const arrowHelper = new ArrowHelper(normal, coplanarPoint, 5, 0xffff00);
    group.add(arrowHelper);
    group.add(mesh);
    return group;
}
function loadersBoundingBoxToMesh(tile) {
    // Create a basic rectangle geometry from math.gl half-axes
    const { boundingVolume } = tile;
    let redColor = 0;
    if (tile.content) {
        redColor = Math.min(tile.content.byteLength / 500000, 1.0);
    }
    const boxColor = new Color(redColor, 1.0, 0.0);
    const boxGeometry = new BoxGeometry(1, 1, 1);
    const boxTransform = new Matrix4$1();
    if (boundingVolume.halfAxes) {
        boxTransform.copy(getMatrix4FromHalfAxes(boundingVolume.halfAxes));
    }
    else if (boundingVolume.radius) {
        boxGeometry.scale(boundingVolume.radius * 2, boundingVolume.radius * 2, boundingVolume.radius * 2);
    }
    boxGeometry.applyMatrix4(boxTransform);
    const edges = new EdgesGeometry(boxGeometry);
    const dispPlane = new LineSegments(edges, new LineBasicMaterial({ color: boxColor }));
    dispPlane.position.copy(new Vector3$1(...boundingVolume.center));
    return dispPlane;
}
function getMatrix4FromHalfAxes(halfAxes) {
    const m = halfAxes;
    const rotateMatrix = new Matrix4$1().fromArray([
        m[0] * 2,
        m[1] * 2,
        m[2] * 2,
        0,
        m[3] * 2,
        m[4] * 2,
        m[5] * 2,
        0,
        m[6] * 2,
        m[7] * 2,
        m[8] * 2,
        0,
        0,
        0,
        0,
        1,
    ]);
    return rotateMatrix;
}
/*
 * from https://github.com/tentone/geo-three
 * Tree-shaking did not work, probably due to static class methods
*/
function datumsToSpherical(latitude, longitude) {
    const EARTH_RADIUS = 6378137;
    const EARTH_PERIMETER = 2 * Math.PI * EARTH_RADIUS;
    const EARTH_ORIGIN = EARTH_PERIMETER / 2.0;
    const x = longitude * EARTH_ORIGIN / 180.0;
    let y = Math.log(Math.tan((90 + latitude) * Math.PI / 360.0)) / (Math.PI / 180.0);
    y = y * EARTH_ORIGIN / 180.0;
    return new Vector2$1(x, y);
}

class GLTFLoader extends Loader {

	constructor( manager ) {

		super( manager );

		this.dracoLoader = null;
		this.ktx2Loader = null;
		this.meshoptDecoder = null;

		this.pluginCallbacks = [];

		this.register( function ( parser ) {

			return new GLTFMaterialsClearcoatExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFTextureBasisUExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFTextureWebPExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsSheenExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsTransmissionExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsVolumeExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsIorExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMaterialsSpecularExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFLightsExtension( parser );

		} );

		this.register( function ( parser ) {

			return new GLTFMeshoptCompression( parser );

		} );

	}

	load( url, onLoad, onProgress, onError ) {

		const scope = this;

		let resourcePath;

		if ( this.resourcePath !== '' ) {

			resourcePath = this.resourcePath;

		} else if ( this.path !== '' ) {

			resourcePath = this.path;

		} else {

			resourcePath = LoaderUtils.extractUrlBase( url );

		}

		// Tells the LoadingManager to track an extra item, which resolves after
		// the model is fully loaded. This means the count of items loaded will
		// be incorrect, but ensures manager.onLoad() does not fire early.
		this.manager.itemStart( url );

		const _onError = function ( e ) {

			if ( onError ) {

				onError( e );

			} else {

				console.error( e );

			}

			scope.manager.itemError( url );
			scope.manager.itemEnd( url );

		};

		const loader = new FileLoader( this.manager );

		loader.setPath( this.path );
		loader.setResponseType( 'arraybuffer' );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );

		loader.load( url, function ( data ) {

			try {

				scope.parse( data, resourcePath, function ( gltf ) {

					onLoad( gltf );

					scope.manager.itemEnd( url );

				}, _onError );

			} catch ( e ) {

				_onError( e );

			}

		}, onProgress, _onError );

	}

	setDRACOLoader( dracoLoader ) {

		this.dracoLoader = dracoLoader;
		return this;

	}

	setDDSLoader() {

		throw new Error(

			'THREE.GLTFLoader: "MSFT_texture_dds" no longer supported. Please update to "KHR_texture_basisu".'

		);

	}

	setKTX2Loader( ktx2Loader ) {

		this.ktx2Loader = ktx2Loader;
		return this;

	}

	setMeshoptDecoder( meshoptDecoder ) {

		this.meshoptDecoder = meshoptDecoder;
		return this;

	}

	register( callback ) {

		if ( this.pluginCallbacks.indexOf( callback ) === - 1 ) {

			this.pluginCallbacks.push( callback );

		}

		return this;

	}

	unregister( callback ) {

		if ( this.pluginCallbacks.indexOf( callback ) !== - 1 ) {

			this.pluginCallbacks.splice( this.pluginCallbacks.indexOf( callback ), 1 );

		}

		return this;

	}

	parse( data, path, onLoad, onError ) {

		let content;
		const extensions = {};
		const plugins = {};

		if ( typeof data === 'string' ) {

			content = data;

		} else {

			const magic = LoaderUtils.decodeText( new Uint8Array( data, 0, 4 ) );

			if ( magic === BINARY_EXTENSION_HEADER_MAGIC ) {

				try {

					extensions[ EXTENSIONS.KHR_BINARY_GLTF ] = new GLTFBinaryExtension( data );

				} catch ( error ) {

					if ( onError ) onError( error );
					return;

				}

				content = extensions[ EXTENSIONS.KHR_BINARY_GLTF ].content;

			} else {

				content = LoaderUtils.decodeText( new Uint8Array( data ) );

			}

		}

		const json = JSON.parse( content );

		if ( json.asset === undefined || json.asset.version[ 0 ] < 2 ) {

			if ( onError ) onError( new Error( 'THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.' ) );
			return;

		}

		const parser = new GLTFParser( json, {

			path: path || this.resourcePath || '',
			crossOrigin: this.crossOrigin,
			requestHeader: this.requestHeader,
			manager: this.manager,
			ktx2Loader: this.ktx2Loader,
			meshoptDecoder: this.meshoptDecoder

		} );

		parser.fileLoader.setRequestHeader( this.requestHeader );

		for ( let i = 0; i < this.pluginCallbacks.length; i ++ ) {

			const plugin = this.pluginCallbacks[ i ]( parser );
			plugins[ plugin.name ] = plugin;

			// Workaround to avoid determining as unknown extension
			// in addUnknownExtensionsToUserData().
			// Remove this workaround if we move all the existing
			// extension handlers to plugin system
			extensions[ plugin.name ] = true;

		}

		if ( json.extensionsUsed ) {

			for ( let i = 0; i < json.extensionsUsed.length; ++ i ) {

				const extensionName = json.extensionsUsed[ i ];
				const extensionsRequired = json.extensionsRequired || [];

				switch ( extensionName ) {

					case EXTENSIONS.KHR_MATERIALS_UNLIT:
						extensions[ extensionName ] = new GLTFMaterialsUnlitExtension();
						break;

					case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
						extensions[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
						break;

					case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
						extensions[ extensionName ] = new GLTFDracoMeshCompressionExtension( json, this.dracoLoader );
						break;

					case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
						extensions[ extensionName ] = new GLTFTextureTransformExtension();
						break;

					case EXTENSIONS.KHR_MESH_QUANTIZATION:
						extensions[ extensionName ] = new GLTFMeshQuantizationExtension();
						break;

					default:

						if ( extensionsRequired.indexOf( extensionName ) >= 0 && plugins[ extensionName ] === undefined ) {

							console.warn( 'THREE.GLTFLoader: Unknown extension "' + extensionName + '".' );

						}

				}

			}

		}

		parser.setExtensions( extensions );
		parser.setPlugins( plugins );
		parser.parse( onLoad, onError );

	}

	parseAsync( data, path ) {

		const scope = this;

		return new Promise( function ( resolve, reject ) {

			scope.parse( data, path, resolve, reject );

		} );

	}

}

/* GLTFREGISTRY */

function GLTFRegistry() {

	let objects = {};

	return	{

		get: function ( key ) {

			return objects[ key ];

		},

		add: function ( key, object ) {

			objects[ key ] = object;

		},

		remove: function ( key ) {

			delete objects[ key ];

		},

		removeAll: function () {

			objects = {};

		}

	};

}

/*********************************/
/********** EXTENSIONS ***********/
/*********************************/

const EXTENSIONS = {
	KHR_BINARY_GLTF: 'KHR_binary_glTF',
	KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',
	KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',
	KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat',
	KHR_MATERIALS_IOR: 'KHR_materials_ior',
	KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
	KHR_MATERIALS_SHEEN: 'KHR_materials_sheen',
	KHR_MATERIALS_SPECULAR: 'KHR_materials_specular',
	KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
	KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
	KHR_MATERIALS_VOLUME: 'KHR_materials_volume',
	KHR_TEXTURE_BASISU: 'KHR_texture_basisu',
	KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
	KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
	EXT_TEXTURE_WEBP: 'EXT_texture_webp',
	EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression'
};

/**
 * Punctual Lights Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
 */
class GLTFLightsExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;

		// Object3D instance caches
		this.cache = { refs: {}, uses: {} };

	}

	_markDefs() {

		const parser = this.parser;
		const nodeDefs = this.parser.json.nodes || [];

		for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

			const nodeDef = nodeDefs[ nodeIndex ];

			if ( nodeDef.extensions
					&& nodeDef.extensions[ this.name ]
					&& nodeDef.extensions[ this.name ].light !== undefined ) {

				parser._addNodeRef( this.cache, nodeDef.extensions[ this.name ].light );

			}

		}

	}

	_loadLight( lightIndex ) {

		const parser = this.parser;
		const cacheKey = 'light:' + lightIndex;
		let dependency = parser.cache.get( cacheKey );

		if ( dependency ) return dependency;

		const json = parser.json;
		const extensions = ( json.extensions && json.extensions[ this.name ] ) || {};
		const lightDefs = extensions.lights || [];
		const lightDef = lightDefs[ lightIndex ];
		let lightNode;

		const color = new Color( 0xffffff );

		if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );

		const range = lightDef.range !== undefined ? lightDef.range : 0;

		switch ( lightDef.type ) {

			case 'directional':
				lightNode = new DirectionalLight( color );
				lightNode.target.position.set( 0, 0, - 1 );
				lightNode.add( lightNode.target );
				break;

			case 'point':
				lightNode = new PointLight( color );
				lightNode.distance = range;
				break;

			case 'spot':
				lightNode = new SpotLight( color );
				lightNode.distance = range;
				// Handle spotlight properties.
				lightDef.spot = lightDef.spot || {};
				lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;
				lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0;
				lightNode.angle = lightDef.spot.outerConeAngle;
				lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle;
				lightNode.target.position.set( 0, 0, - 1 );
				lightNode.add( lightNode.target );
				break;

			default:
				throw new Error( 'THREE.GLTFLoader: Unexpected light type: ' + lightDef.type );

		}

		// Some lights (e.g. spot) default to a position other than the origin. Reset the position
		// here, because node-level parsing will only override position if explicitly specified.
		lightNode.position.set( 0, 0, 0 );

		lightNode.decay = 2;

		if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;

		lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );

		dependency = Promise.resolve( lightNode );

		parser.cache.add( cacheKey, dependency );

		return dependency;

	}

	createNodeAttachment( nodeIndex ) {

		const self = this;
		const parser = this.parser;
		const json = parser.json;
		const nodeDef = json.nodes[ nodeIndex ];
		const lightDef = ( nodeDef.extensions && nodeDef.extensions[ this.name ] ) || {};
		const lightIndex = lightDef.light;

		if ( lightIndex === undefined ) return null;

		return this._loadLight( lightIndex ).then( function ( light ) {

			return parser._getNodeRef( self.cache, lightIndex, light );

		} );

	}

}

/**
 * Unlit Materials Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
 */
class GLTFMaterialsUnlitExtension {

	constructor() {

		this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;

	}

	getMaterialType() {

		return MeshBasicMaterial;

	}

	extendParams( materialParams, materialDef, parser ) {

		const pending = [];

		materialParams.color = new Color( 1.0, 1.0, 1.0 );
		materialParams.opacity = 1.0;

		const metallicRoughness = materialDef.pbrMetallicRoughness;

		if ( metallicRoughness ) {

			if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

				const array = metallicRoughness.baseColorFactor;

				materialParams.color.fromArray( array );
				materialParams.opacity = array[ 3 ];

			}

			if ( metallicRoughness.baseColorTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

			}

		}

		return Promise.all( pending );

	}

}

/**
 * Clearcoat Materials Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
 */
class GLTFMaterialsClearcoatExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const pending = [];

		const extension = materialDef.extensions[ this.name ];

		if ( extension.clearcoatFactor !== undefined ) {

			materialParams.clearcoat = extension.clearcoatFactor;

		}

		if ( extension.clearcoatTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );

		}

		if ( extension.clearcoatRoughnessFactor !== undefined ) {

			materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;

		}

		if ( extension.clearcoatRoughnessTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );

		}

		if ( extension.clearcoatNormalTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );

			if ( extension.clearcoatNormalTexture.scale !== undefined ) {

				const scale = extension.clearcoatNormalTexture.scale;

				materialParams.clearcoatNormalScale = new Vector2$1( scale, scale );

			}

		}

		return Promise.all( pending );

	}

}

/**
 * Sheen Materials Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_sheen
 */
class GLTFMaterialsSheenExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_SHEEN;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const pending = [];

		materialParams.sheenColor = new Color( 0, 0, 0 );
		materialParams.sheenRoughness = 0;
		materialParams.sheen = 1;

		const extension = materialDef.extensions[ this.name ];

		if ( extension.sheenColorFactor !== undefined ) {

			materialParams.sheenColor.fromArray( extension.sheenColorFactor );

		}

		if ( extension.sheenRoughnessFactor !== undefined ) {

			materialParams.sheenRoughness = extension.sheenRoughnessFactor;

		}

		if ( extension.sheenColorTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'sheenColorMap', extension.sheenColorTexture ) );

		}

		if ( extension.sheenRoughnessTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'sheenRoughnessMap', extension.sheenRoughnessTexture ) );

		}

		return Promise.all( pending );

	}

}

/**
 * Transmission Materials Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
 * Draft: https://github.com/KhronosGroup/glTF/pull/1698
 */
class GLTFMaterialsTransmissionExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const pending = [];

		const extension = materialDef.extensions[ this.name ];

		if ( extension.transmissionFactor !== undefined ) {

			materialParams.transmission = extension.transmissionFactor;

		}

		if ( extension.transmissionTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );

		}

		return Promise.all( pending );

	}

}

/**
 * Materials Volume Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_volume
 */
class GLTFMaterialsVolumeExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_VOLUME;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const pending = [];

		const extension = materialDef.extensions[ this.name ];

		materialParams.thickness = extension.thicknessFactor !== undefined ? extension.thicknessFactor : 0;

		if ( extension.thicknessTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'thicknessMap', extension.thicknessTexture ) );

		}

		materialParams.attenuationDistance = extension.attenuationDistance || 0;

		const colorArray = extension.attenuationColor || [ 1, 1, 1 ];
		materialParams.attenuationColor = new Color( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ] );

		return Promise.all( pending );

	}

}

/**
 * Materials ior Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_ior
 */
class GLTFMaterialsIorExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_IOR;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const extension = materialDef.extensions[ this.name ];

		materialParams.ior = extension.ior !== undefined ? extension.ior : 1.5;

		return Promise.resolve();

	}

}

/**
 * Materials specular Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_specular
 */
class GLTFMaterialsSpecularExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_MATERIALS_SPECULAR;

	}

	getMaterialType( materialIndex ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

		return MeshPhysicalMaterial;

	}

	extendMaterialParams( materialIndex, materialParams ) {

		const parser = this.parser;
		const materialDef = parser.json.materials[ materialIndex ];

		if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

			return Promise.resolve();

		}

		const pending = [];

		const extension = materialDef.extensions[ this.name ];

		materialParams.specularIntensity = extension.specularFactor !== undefined ? extension.specularFactor : 1.0;

		if ( extension.specularTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'specularIntensityMap', extension.specularTexture ) );

		}

		const colorArray = extension.specularColorFactor || [ 1, 1, 1 ];
		materialParams.specularColor = new Color( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ] );

		if ( extension.specularColorTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'specularColorMap', extension.specularColorTexture ).then( function ( texture ) {

				texture.encoding = sRGBEncoding;

			} ) );

		}

		return Promise.all( pending );

	}

}

/**
 * BasisU Texture Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
 */
class GLTFTextureBasisUExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.KHR_TEXTURE_BASISU;

	}

	loadTexture( textureIndex ) {

		const parser = this.parser;
		const json = parser.json;

		const textureDef = json.textures[ textureIndex ];

		if ( ! textureDef.extensions || ! textureDef.extensions[ this.name ] ) {

			return null;

		}

		const extension = textureDef.extensions[ this.name ];
		const source = json.images[ extension.source ];
		const loader = parser.options.ktx2Loader;

		if ( ! loader ) {

			if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

				throw new Error( 'THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures' );

			} else {

				// Assumes that the extension is optional and that a fallback texture is present
				return null;

			}

		}

		return parser.loadTextureImage( textureIndex, source, loader );

	}

}

/**
 * WebP Texture Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
 */
class GLTFTextureWebPExtension {

	constructor( parser ) {

		this.parser = parser;
		this.name = EXTENSIONS.EXT_TEXTURE_WEBP;
		this.isSupported = null;

	}

	loadTexture( textureIndex ) {

		const name = this.name;
		const parser = this.parser;
		const json = parser.json;

		const textureDef = json.textures[ textureIndex ];

		if ( ! textureDef.extensions || ! textureDef.extensions[ name ] ) {

			return null;

		}

		const extension = textureDef.extensions[ name ];
		const source = json.images[ extension.source ];

		let loader = parser.textureLoader;
		if ( source.uri ) {

			const handler = parser.options.manager.getHandler( source.uri );
			if ( handler !== null ) loader = handler;

		}

		return this.detectSupport().then( function ( isSupported ) {

			if ( isSupported ) return parser.loadTextureImage( textureIndex, source, loader );

			if ( json.extensionsRequired && json.extensionsRequired.indexOf( name ) >= 0 ) {

				throw new Error( 'THREE.GLTFLoader: WebP required by asset but unsupported.' );

			}

			// Fall back to PNG or JPEG.
			return parser.loadTexture( textureIndex );

		} );

	}

	detectSupport() {

		if ( ! this.isSupported ) {

			this.isSupported = new Promise( function ( resolve ) {

				const image = new Image();

				// Lossy test image. Support for lossy images doesn't guarantee support for all
				// WebP images, unfortunately.
				image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA';

				image.onload = image.onerror = function () {

					resolve( image.height === 1 );

				};

			} );

		}

		return this.isSupported;

	}

}

/**
 * meshopt BufferView Compression Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
 */
class GLTFMeshoptCompression {

	constructor( parser ) {

		this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION;
		this.parser = parser;

	}

	loadBufferView( index ) {

		const json = this.parser.json;
		const bufferView = json.bufferViews[ index ];

		if ( bufferView.extensions && bufferView.extensions[ this.name ] ) {

			const extensionDef = bufferView.extensions[ this.name ];

			const buffer = this.parser.getDependency( 'buffer', extensionDef.buffer );
			const decoder = this.parser.options.meshoptDecoder;

			if ( ! decoder || ! decoder.supported ) {

				if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

					throw new Error( 'THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files' );

				} else {

					// Assumes that the extension is optional and that fallback buffer data is present
					return null;

				}

			}

			return Promise.all( [ buffer, decoder.ready ] ).then( function ( res ) {

				const byteOffset = extensionDef.byteOffset || 0;
				const byteLength = extensionDef.byteLength || 0;

				const count = extensionDef.count;
				const stride = extensionDef.byteStride;

				const result = new ArrayBuffer( count * stride );
				const source = new Uint8Array( res[ 0 ], byteOffset, byteLength );

				decoder.decodeGltfBuffer( new Uint8Array( result ), count, stride, source, extensionDef.mode, extensionDef.filter );
				return result;

			} );

		} else {

			return null;

		}

	}

}

/* BINARY EXTENSION */
const BINARY_EXTENSION_HEADER_MAGIC = 'glTF';
const BINARY_EXTENSION_HEADER_LENGTH = 12;
const BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };

class GLTFBinaryExtension {

	constructor( data ) {

		this.name = EXTENSIONS.KHR_BINARY_GLTF;
		this.content = null;
		this.body = null;

		const headerView = new DataView( data, 0, BINARY_EXTENSION_HEADER_LENGTH );

		this.header = {
			magic: LoaderUtils.decodeText( new Uint8Array( data.slice( 0, 4 ) ) ),
			version: headerView.getUint32( 4, true ),
			length: headerView.getUint32( 8, true )
		};

		if ( this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC ) {

			throw new Error( 'THREE.GLTFLoader: Unsupported glTF-Binary header.' );

		} else if ( this.header.version < 2.0 ) {

			throw new Error( 'THREE.GLTFLoader: Legacy binary file detected.' );

		}

		const chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH;
		const chunkView = new DataView( data, BINARY_EXTENSION_HEADER_LENGTH );
		let chunkIndex = 0;

		while ( chunkIndex < chunkContentsLength ) {

			const chunkLength = chunkView.getUint32( chunkIndex, true );
			chunkIndex += 4;

			const chunkType = chunkView.getUint32( chunkIndex, true );
			chunkIndex += 4;

			if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON ) {

				const contentArray = new Uint8Array( data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength );
				this.content = LoaderUtils.decodeText( contentArray );

			} else if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN ) {

				const byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex;
				this.body = data.slice( byteOffset, byteOffset + chunkLength );

			}

			// Clients must ignore chunks with unknown types.

			chunkIndex += chunkLength;

		}

		if ( this.content === null ) {

			throw new Error( 'THREE.GLTFLoader: JSON content not found.' );

		}

	}

}

/**
 * DRACO Mesh Compression Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression
 */
class GLTFDracoMeshCompressionExtension {

	constructor( json, dracoLoader ) {

		if ( ! dracoLoader ) {

			throw new Error( 'THREE.GLTFLoader: No DRACOLoader instance provided.' );

		}

		this.name = EXTENSIONS.KHR_DRACO_MESH_COMPRESSION;
		this.json = json;
		this.dracoLoader = dracoLoader;
		this.dracoLoader.preload();

	}

	decodePrimitive( primitive, parser ) {

		const json = this.json;
		const dracoLoader = this.dracoLoader;
		const bufferViewIndex = primitive.extensions[ this.name ].bufferView;
		const gltfAttributeMap = primitive.extensions[ this.name ].attributes;
		const threeAttributeMap = {};
		const attributeNormalizedMap = {};
		const attributeTypeMap = {};

		for ( const attributeName in gltfAttributeMap ) {

			const threeAttributeName = ATTRIBUTES[ attributeName ] || attributeName.toLowerCase();

			threeAttributeMap[ threeAttributeName ] = gltfAttributeMap[ attributeName ];

		}

		for ( const attributeName in primitive.attributes ) {

			const threeAttributeName = ATTRIBUTES[ attributeName ] || attributeName.toLowerCase();

			if ( gltfAttributeMap[ attributeName ] !== undefined ) {

				const accessorDef = json.accessors[ primitive.attributes[ attributeName ] ];
				const componentType = WEBGL_COMPONENT_TYPES[ accessorDef.componentType ];

				attributeTypeMap[ threeAttributeName ] = componentType;
				attributeNormalizedMap[ threeAttributeName ] = accessorDef.normalized === true;

			}

		}

		return parser.getDependency( 'bufferView', bufferViewIndex ).then( function ( bufferView ) {

			return new Promise( function ( resolve ) {

				dracoLoader.decodeDracoFile( bufferView, function ( geometry ) {

					for ( const attributeName in geometry.attributes ) {

						const attribute = geometry.attributes[ attributeName ];
						const normalized = attributeNormalizedMap[ attributeName ];

						if ( normalized !== undefined ) attribute.normalized = normalized;

					}

					resolve( geometry );

				}, threeAttributeMap, attributeTypeMap );

			} );

		} );

	}

}

/**
 * Texture Transform Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_transform
 */
class GLTFTextureTransformExtension {

	constructor() {

		this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM;

	}

	extendTexture( texture, transform ) {

		if ( transform.texCoord !== undefined ) {

			console.warn( 'THREE.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.' );

		}

		if ( transform.offset === undefined && transform.rotation === undefined && transform.scale === undefined ) {

			// See https://github.com/mrdoob/three.js/issues/21819.
			return texture;

		}

		texture = texture.clone();

		if ( transform.offset !== undefined ) {

			texture.offset.fromArray( transform.offset );

		}

		if ( transform.rotation !== undefined ) {

			texture.rotation = transform.rotation;

		}

		if ( transform.scale !== undefined ) {

			texture.repeat.fromArray( transform.scale );

		}

		texture.needsUpdate = true;

		return texture;

	}

}

/**
 * Specular-Glossiness Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Archived/KHR_materials_pbrSpecularGlossiness
 */

/**
 * A sub class of StandardMaterial with some of the functionality
 * changed via the `onBeforeCompile` callback
 * @pailhead
 */
class GLTFMeshStandardSGMaterial extends MeshStandardMaterial {

	constructor( params ) {

		super();

		this.isGLTFSpecularGlossinessMaterial = true;

		//various chunks that need replacing
		const specularMapParsFragmentChunk = [
			'#ifdef USE_SPECULARMAP',
			'	uniform sampler2D specularMap;',
			'#endif'
		].join( '\n' );

		const glossinessMapParsFragmentChunk = [
			'#ifdef USE_GLOSSINESSMAP',
			'	uniform sampler2D glossinessMap;',
			'#endif'
		].join( '\n' );

		const specularMapFragmentChunk = [
			'vec3 specularFactor = specular;',
			'#ifdef USE_SPECULARMAP',
			'	vec4 texelSpecular = texture2D( specularMap, vUv );',
			'	// reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
			'	specularFactor *= texelSpecular.rgb;',
			'#endif'
		].join( '\n' );

		const glossinessMapFragmentChunk = [
			'float glossinessFactor = glossiness;',
			'#ifdef USE_GLOSSINESSMAP',
			'	vec4 texelGlossiness = texture2D( glossinessMap, vUv );',
			'	// reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture',
			'	glossinessFactor *= texelGlossiness.a;',
			'#endif'
		].join( '\n' );

		const lightPhysicalFragmentChunk = [
			'PhysicalMaterial material;',
			'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );',
			'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );',
			'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );',
			'material.roughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.',
			'material.roughness += geometryRoughness;',
			'material.roughness = min( material.roughness, 1.0 );',
			'material.specularColor = specularFactor;',
		].join( '\n' );

		const uniforms = {
			specular: { value: new Color().setHex( 0xffffff ) },
			glossiness: { value: 1 },
			specularMap: { value: null },
			glossinessMap: { value: null }
		};

		this._extraUniforms = uniforms;

		this.onBeforeCompile = function ( shader ) {

			for ( const uniformName in uniforms ) {

				shader.uniforms[ uniformName ] = uniforms[ uniformName ];

			}

			shader.fragmentShader = shader.fragmentShader
				.replace( 'uniform float roughness;', 'uniform vec3 specular;' )
				.replace( 'uniform float metalness;', 'uniform float glossiness;' )
				.replace( '#include <roughnessmap_pars_fragment>', specularMapParsFragmentChunk )
				.replace( '#include <metalnessmap_pars_fragment>', glossinessMapParsFragmentChunk )
				.replace( '#include <roughnessmap_fragment>', specularMapFragmentChunk )
				.replace( '#include <metalnessmap_fragment>', glossinessMapFragmentChunk )
				.replace( '#include <lights_physical_fragment>', lightPhysicalFragmentChunk );

		};

		Object.defineProperties( this, {

			specular: {
				get: function () {

					return uniforms.specular.value;

				},
				set: function ( v ) {

					uniforms.specular.value = v;

				}
			},

			specularMap: {
				get: function () {

					return uniforms.specularMap.value;

				},
				set: function ( v ) {

					uniforms.specularMap.value = v;

					if ( v ) {

						this.defines.USE_SPECULARMAP = ''; // USE_UV is set by the renderer for specular maps

					} else {

						delete this.defines.USE_SPECULARMAP;

					}

				}
			},

			glossiness: {
				get: function () {

					return uniforms.glossiness.value;

				},
				set: function ( v ) {

					uniforms.glossiness.value = v;

				}
			},

			glossinessMap: {
				get: function () {

					return uniforms.glossinessMap.value;

				},
				set: function ( v ) {

					uniforms.glossinessMap.value = v;

					if ( v ) {

						this.defines.USE_GLOSSINESSMAP = '';
						this.defines.USE_UV = '';

					} else {

						delete this.defines.USE_GLOSSINESSMAP;
						delete this.defines.USE_UV;

					}

				}
			}

		} );

		delete this.metalness;
		delete this.roughness;
		delete this.metalnessMap;
		delete this.roughnessMap;

		this.setValues( params );

	}

	copy( source ) {

		super.copy( source );

		this.specularMap = source.specularMap;
		this.specular.copy( source.specular );
		this.glossinessMap = source.glossinessMap;
		this.glossiness = source.glossiness;
		delete this.metalness;
		delete this.roughness;
		delete this.metalnessMap;
		delete this.roughnessMap;
		return this;

	}

}


class GLTFMaterialsPbrSpecularGlossinessExtension {

	constructor() {

		this.name = EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS;

		this.specularGlossinessParams = [
			'color',
			'map',
			'lightMap',
			'lightMapIntensity',
			'aoMap',
			'aoMapIntensity',
			'emissive',
			'emissiveIntensity',
			'emissiveMap',
			'bumpMap',
			'bumpScale',
			'normalMap',
			'normalMapType',
			'displacementMap',
			'displacementScale',
			'displacementBias',
			'specularMap',
			'specular',
			'glossinessMap',
			'glossiness',
			'alphaMap',
			'envMap',
			'envMapIntensity',
			'refractionRatio',
		];

	}

	getMaterialType() {

		return GLTFMeshStandardSGMaterial;

	}

	extendParams( materialParams, materialDef, parser ) {

		const pbrSpecularGlossiness = materialDef.extensions[ this.name ];

		materialParams.color = new Color( 1.0, 1.0, 1.0 );
		materialParams.opacity = 1.0;

		const pending = [];

		if ( Array.isArray( pbrSpecularGlossiness.diffuseFactor ) ) {

			const array = pbrSpecularGlossiness.diffuseFactor;

			materialParams.color.fromArray( array );
			materialParams.opacity = array[ 3 ];

		}

		if ( pbrSpecularGlossiness.diffuseTexture !== undefined ) {

			pending.push( parser.assignTexture( materialParams, 'map', pbrSpecularGlossiness.diffuseTexture ) );

		}

		materialParams.emissive = new Color( 0.0, 0.0, 0.0 );
		materialParams.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0;
		materialParams.specular = new Color( 1.0, 1.0, 1.0 );

		if ( Array.isArray( pbrSpecularGlossiness.specularFactor ) ) {

			materialParams.specular.fromArray( pbrSpecularGlossiness.specularFactor );

		}

		if ( pbrSpecularGlossiness.specularGlossinessTexture !== undefined ) {

			const specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture;
			pending.push( parser.assignTexture( materialParams, 'glossinessMap', specGlossMapDef ) );
			pending.push( parser.assignTexture( materialParams, 'specularMap', specGlossMapDef ) );

		}

		return Promise.all( pending );

	}

	createMaterial( materialParams ) {

		const material = new GLTFMeshStandardSGMaterial( materialParams );
		material.fog = true;

		material.color = materialParams.color;

		material.map = materialParams.map === undefined ? null : materialParams.map;

		material.lightMap = null;
		material.lightMapIntensity = 1.0;

		material.aoMap = materialParams.aoMap === undefined ? null : materialParams.aoMap;
		material.aoMapIntensity = 1.0;

		material.emissive = materialParams.emissive;
		material.emissiveIntensity = 1.0;
		material.emissiveMap = materialParams.emissiveMap === undefined ? null : materialParams.emissiveMap;

		material.bumpMap = materialParams.bumpMap === undefined ? null : materialParams.bumpMap;
		material.bumpScale = 1;

		material.normalMap = materialParams.normalMap === undefined ? null : materialParams.normalMap;
		material.normalMapType = TangentSpaceNormalMap;

		if ( materialParams.normalScale ) material.normalScale = materialParams.normalScale;

		material.displacementMap = null;
		material.displacementScale = 1;
		material.displacementBias = 0;

		material.specularMap = materialParams.specularMap === undefined ? null : materialParams.specularMap;
		material.specular = materialParams.specular;

		material.glossinessMap = materialParams.glossinessMap === undefined ? null : materialParams.glossinessMap;
		material.glossiness = materialParams.glossiness;

		material.alphaMap = null;

		material.envMap = materialParams.envMap === undefined ? null : materialParams.envMap;
		material.envMapIntensity = 1.0;

		material.refractionRatio = 0.98;

		return material;

	}

}

/**
 * Mesh Quantization Extension
 *
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization
 */
class GLTFMeshQuantizationExtension {

	constructor() {

		this.name = EXTENSIONS.KHR_MESH_QUANTIZATION;

	}

}

/*********************************/
/********** INTERPOLATION ********/
/*********************************/

// Spline Interpolation
// Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-c-spline-interpolation
class GLTFCubicSplineInterpolant extends Interpolant {

	constructor( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		super( parameterPositions, sampleValues, sampleSize, resultBuffer );

	}

	copySampleValue_( index ) {

		// Copies a sample value to the result buffer. See description of glTF
		// CUBICSPLINE values layout in interpolate_() function below.

		const result = this.resultBuffer,
			values = this.sampleValues,
			valueSize = this.valueSize,
			offset = index * valueSize * 3 + valueSize;

		for ( let i = 0; i !== valueSize; i ++ ) {

			result[ i ] = values[ offset + i ];

		}

		return result;

	}

}

GLTFCubicSplineInterpolant.prototype.beforeStart_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;

GLTFCubicSplineInterpolant.prototype.afterEnd_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;

GLTFCubicSplineInterpolant.prototype.interpolate_ = function ( i1, t0, t, t1 ) {

	const result = this.resultBuffer;
	const values = this.sampleValues;
	const stride = this.valueSize;

	const stride2 = stride * 2;
	const stride3 = stride * 3;

	const td = t1 - t0;

	const p = ( t - t0 ) / td;
	const pp = p * p;
	const ppp = pp * p;

	const offset1 = i1 * stride3;
	const offset0 = offset1 - stride3;

	const s2 = - 2 * ppp + 3 * pp;
	const s3 = ppp - pp;
	const s0 = 1 - s2;
	const s1 = s3 - pp + p;

	// Layout of keyframe output values for CUBICSPLINE animations:
	//   [ inTangent_1, splineVertex_1, outTangent_1, inTangent_2, splineVertex_2, ... ]
	for ( let i = 0; i !== stride; i ++ ) {

		const p0 = values[ offset0 + i + stride ]; // splineVertex_k
		const m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k)
		const p1 = values[ offset1 + i + stride ]; // splineVertex_k+1
		const m1 = values[ offset1 + i ] * td; // inTangent_k+1 * (t_k+1 - t_k)

		result[ i ] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;

	}

	return result;

};

const _q = new Quaternion$1();

class GLTFCubicSplineQuaternionInterpolant extends GLTFCubicSplineInterpolant {

	interpolate_( i1, t0, t, t1 ) {

		const result = super.interpolate_( i1, t0, t, t1 );

		_q.fromArray( result ).normalize().toArray( result );

		return result;

	}

}


/*********************************/
/********** INTERNALS ************/
/*********************************/

/* CONSTANTS */

const WEBGL_CONSTANTS = {
	FLOAT: 5126,
	//FLOAT_MAT2: 35674,
	FLOAT_MAT3: 35675,
	FLOAT_MAT4: 35676,
	FLOAT_VEC2: 35664,
	FLOAT_VEC3: 35665,
	FLOAT_VEC4: 35666,
	LINEAR: 9729,
	REPEAT: 10497,
	SAMPLER_2D: 35678,
	POINTS: 0,
	LINES: 1,
	LINE_LOOP: 2,
	LINE_STRIP: 3,
	TRIANGLES: 4,
	TRIANGLE_STRIP: 5,
	TRIANGLE_FAN: 6,
	UNSIGNED_BYTE: 5121,
	UNSIGNED_SHORT: 5123
};

const WEBGL_COMPONENT_TYPES = {
	5120: Int8Array,
	5121: Uint8Array,
	5122: Int16Array,
	5123: Uint16Array,
	5125: Uint32Array,
	5126: Float32Array
};

const WEBGL_FILTERS = {
	9728: NearestFilter,
	9729: LinearFilter,
	9984: NearestMipmapNearestFilter,
	9985: LinearMipmapNearestFilter,
	9986: NearestMipmapLinearFilter,
	9987: LinearMipmapLinearFilter
};

const WEBGL_WRAPPINGS = {
	33071: ClampToEdgeWrapping,
	33648: MirroredRepeatWrapping,
	10497: RepeatWrapping
};

const WEBGL_TYPE_SIZES = {
	'SCALAR': 1,
	'VEC2': 2,
	'VEC3': 3,
	'VEC4': 4,
	'MAT2': 4,
	'MAT3': 9,
	'MAT4': 16
};

const ATTRIBUTES = {
	POSITION: 'position',
	NORMAL: 'normal',
	TANGENT: 'tangent',
	TEXCOORD_0: 'uv',
	TEXCOORD_1: 'uv2',
	COLOR_0: 'color',
	WEIGHTS_0: 'skinWeight',
	JOINTS_0: 'skinIndex',
};

const PATH_PROPERTIES = {
	scale: 'scale',
	translation: 'position',
	rotation: 'quaternion',
	weights: 'morphTargetInfluences'
};

const INTERPOLATION = {
	CUBICSPLINE: undefined, // We use a custom interpolant (GLTFCubicSplineInterpolation) for CUBICSPLINE tracks. Each
		                        // keyframe track will be initialized with a default interpolation type, then modified.
	LINEAR: InterpolateLinear,
	STEP: InterpolateDiscrete
};

const ALPHA_MODES = {
	OPAQUE: 'OPAQUE',
	MASK: 'MASK',
	BLEND: 'BLEND'
};

/**
 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#default-material
 */
function createDefaultMaterial( cache ) {

	if ( cache[ 'DefaultMaterial' ] === undefined ) {

		cache[ 'DefaultMaterial' ] = new MeshStandardMaterial( {
			color: 0xFFFFFF,
			emissive: 0x000000,
			metalness: 1,
			roughness: 1,
			transparent: false,
			depthTest: true,
			side: FrontSide
		} );

	}

	return cache[ 'DefaultMaterial' ];

}

function addUnknownExtensionsToUserData( knownExtensions, object, objectDef ) {

	// Add unknown glTF extensions to an object's userData.

	for ( const name in objectDef.extensions ) {

		if ( knownExtensions[ name ] === undefined ) {

			object.userData.gltfExtensions = object.userData.gltfExtensions || {};
			object.userData.gltfExtensions[ name ] = objectDef.extensions[ name ];

		}

	}

}

/**
 * @param {Object3D|Material|BufferGeometry} object
 * @param {GLTF.definition} gltfDef
 */
function assignExtrasToUserData( object, gltfDef ) {

	if ( gltfDef.extras !== undefined ) {

		if ( typeof gltfDef.extras === 'object' ) {

			Object.assign( object.userData, gltfDef.extras );

		} else {

			console.warn( 'THREE.GLTFLoader: Ignoring primitive type .extras, ' + gltfDef.extras );

		}

	}

}

/**
 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#morph-targets
 *
 * @param {BufferGeometry} geometry
 * @param {Array<GLTF.Target>} targets
 * @param {GLTFParser} parser
 * @return {Promise<BufferGeometry>}
 */
function addMorphTargets( geometry, targets, parser ) {

	let hasMorphPosition = false;
	let hasMorphNormal = false;

	for ( let i = 0, il = targets.length; i < il; i ++ ) {

		const target = targets[ i ];

		if ( target.POSITION !== undefined ) hasMorphPosition = true;
		if ( target.NORMAL !== undefined ) hasMorphNormal = true;

		if ( hasMorphPosition && hasMorphNormal ) break;

	}

	if ( ! hasMorphPosition && ! hasMorphNormal ) return Promise.resolve( geometry );

	const pendingPositionAccessors = [];
	const pendingNormalAccessors = [];

	for ( let i = 0, il = targets.length; i < il; i ++ ) {

		const target = targets[ i ];

		if ( hasMorphPosition ) {

			const pendingAccessor = target.POSITION !== undefined
				? parser.getDependency( 'accessor', target.POSITION )
				: geometry.attributes.position;

			pendingPositionAccessors.push( pendingAccessor );

		}

		if ( hasMorphNormal ) {

			const pendingAccessor = target.NORMAL !== undefined
				? parser.getDependency( 'accessor', target.NORMAL )
				: geometry.attributes.normal;

			pendingNormalAccessors.push( pendingAccessor );

		}

	}

	return Promise.all( [
		Promise.all( pendingPositionAccessors ),
		Promise.all( pendingNormalAccessors )
	] ).then( function ( accessors ) {

		const morphPositions = accessors[ 0 ];
		const morphNormals = accessors[ 1 ];

		if ( hasMorphPosition ) geometry.morphAttributes.position = morphPositions;
		if ( hasMorphNormal ) geometry.morphAttributes.normal = morphNormals;
		geometry.morphTargetsRelative = true;

		return geometry;

	} );

}

/**
 * @param {Mesh} mesh
 * @param {GLTF.Mesh} meshDef
 */
function updateMorphTargets( mesh, meshDef ) {

	mesh.updateMorphTargets();

	if ( meshDef.weights !== undefined ) {

		for ( let i = 0, il = meshDef.weights.length; i < il; i ++ ) {

			mesh.morphTargetInfluences[ i ] = meshDef.weights[ i ];

		}

	}

	// .extras has user-defined data, so check that .extras.targetNames is an array.
	if ( meshDef.extras && Array.isArray( meshDef.extras.targetNames ) ) {

		const targetNames = meshDef.extras.targetNames;

		if ( mesh.morphTargetInfluences.length === targetNames.length ) {

			mesh.morphTargetDictionary = {};

			for ( let i = 0, il = targetNames.length; i < il; i ++ ) {

				mesh.morphTargetDictionary[ targetNames[ i ] ] = i;

			}

		} else {

			console.warn( 'THREE.GLTFLoader: Invalid extras.targetNames length. Ignoring names.' );

		}

	}

}

function createPrimitiveKey( primitiveDef ) {

	const dracoExtension = primitiveDef.extensions && primitiveDef.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ];
	let geometryKey;

	if ( dracoExtension ) {

		geometryKey = 'draco:' + dracoExtension.bufferView
				+ ':' + dracoExtension.indices
				+ ':' + createAttributesKey( dracoExtension.attributes );

	} else {

		geometryKey = primitiveDef.indices + ':' + createAttributesKey( primitiveDef.attributes ) + ':' + primitiveDef.mode;

	}

	return geometryKey;

}

function createAttributesKey( attributes ) {

	let attributesKey = '';

	const keys = Object.keys( attributes ).sort();

	for ( let i = 0, il = keys.length; i < il; i ++ ) {

		attributesKey += keys[ i ] + ':' + attributes[ keys[ i ] ] + ';';

	}

	return attributesKey;

}

function getNormalizedComponentScale( constructor ) {

	// Reference:
	// https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization#encoding-quantized-data

	switch ( constructor ) {

		case Int8Array:
			return 1 / 127;

		case Uint8Array:
			return 1 / 255;

		case Int16Array:
			return 1 / 32767;

		case Uint16Array:
			return 1 / 65535;

		default:
			throw new Error( 'THREE.GLTFLoader: Unsupported normalized accessor component type.' );

	}

}

/* GLTF PARSER */

class GLTFParser {

	constructor( json = {}, options = {} ) {

		this.json = json;
		this.extensions = {};
		this.plugins = {};
		this.options = options;

		// loader object cache
		this.cache = new GLTFRegistry();

		// associations between Three.js objects and glTF elements
		this.associations = new Map();

		// BufferGeometry caching
		this.primitiveCache = {};

		// Object3D instance caches
		this.meshCache = { refs: {}, uses: {} };
		this.cameraCache = { refs: {}, uses: {} };
		this.lightCache = { refs: {}, uses: {} };

		this.textureCache = {};

		// Track node names, to ensure no duplicates
		this.nodeNamesUsed = {};

		// Use an ImageBitmapLoader if imageBitmaps are supported. Moves much of the
		// expensive work of uploading a texture to the GPU off the main thread.
		if ( typeof createImageBitmap !== 'undefined' && /Firefox|^((?!chrome|android).)*safari/i.test( navigator.userAgent ) === false ) {

			this.textureLoader = new ImageBitmapLoader( this.options.manager );

		} else {

			this.textureLoader = new TextureLoader( this.options.manager );

		}

		this.textureLoader.setCrossOrigin( this.options.crossOrigin );
		this.textureLoader.setRequestHeader( this.options.requestHeader );

		this.fileLoader = new FileLoader( this.options.manager );
		this.fileLoader.setResponseType( 'arraybuffer' );

		if ( this.options.crossOrigin === 'use-credentials' ) {

			this.fileLoader.setWithCredentials( true );

		}

	}

	setExtensions( extensions ) {

		this.extensions = extensions;

	}

	setPlugins( plugins ) {

		this.plugins = plugins;

	}

	parse( onLoad, onError ) {

		const parser = this;
		const json = this.json;
		const extensions = this.extensions;

		// Clear the loader cache
		this.cache.removeAll();

		// Mark the special nodes/meshes in json for efficient parse
		this._invokeAll( function ( ext ) {

			return ext._markDefs && ext._markDefs();

		} );

		Promise.all( this._invokeAll( function ( ext ) {

			return ext.beforeRoot && ext.beforeRoot();

		} ) ).then( function () {

			return Promise.all( [

				parser.getDependencies( 'scene' ),
				parser.getDependencies( 'animation' ),
				parser.getDependencies( 'camera' ),

			] );

		} ).then( function ( dependencies ) {

			const result = {
				scene: dependencies[ 0 ][ json.scene || 0 ],
				scenes: dependencies[ 0 ],
				animations: dependencies[ 1 ],
				cameras: dependencies[ 2 ],
				asset: json.asset,
				parser: parser,
				userData: {}
			};

			addUnknownExtensionsToUserData( extensions, result, json );

			assignExtrasToUserData( result, json );

			Promise.all( parser._invokeAll( function ( ext ) {

				return ext.afterRoot && ext.afterRoot( result );

			} ) ).then( function () {

				onLoad( result );

			} );

		} ).catch( onError );

	}

	/**
	 * Marks the special nodes/meshes in json for efficient parse.
	 */
	_markDefs() {

		const nodeDefs = this.json.nodes || [];
		const skinDefs = this.json.skins || [];
		const meshDefs = this.json.meshes || [];

		// Nothing in the node definition indicates whether it is a Bone or an
		// Object3D. Use the skins' joint references to mark bones.
		for ( let skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex ++ ) {

			const joints = skinDefs[ skinIndex ].joints;

			for ( let i = 0, il = joints.length; i < il; i ++ ) {

				nodeDefs[ joints[ i ] ].isBone = true;

			}

		}

		// Iterate over all nodes, marking references to shared resources,
		// as well as skeleton joints.
		for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

			const nodeDef = nodeDefs[ nodeIndex ];

			if ( nodeDef.mesh !== undefined ) {

				this._addNodeRef( this.meshCache, nodeDef.mesh );

				// Nothing in the mesh definition indicates whether it is
				// a SkinnedMesh or Mesh. Use the node's mesh reference
				// to mark SkinnedMesh if node has skin.
				if ( nodeDef.skin !== undefined ) {

					meshDefs[ nodeDef.mesh ].isSkinnedMesh = true;

				}

			}

			if ( nodeDef.camera !== undefined ) {

				this._addNodeRef( this.cameraCache, nodeDef.camera );

			}

		}

	}

	/**
	 * Counts references to shared node / Object3D resources. These resources
	 * can be reused, or "instantiated", at multiple nodes in the scene
	 * hierarchy. Mesh, Camera, and Light instances are instantiated and must
	 * be marked. Non-scenegraph resources (like Materials, Geometries, and
	 * Textures) can be reused directly and are not marked here.
	 *
	 * Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
	 */
	_addNodeRef( cache, index ) {

		if ( index === undefined ) return;

		if ( cache.refs[ index ] === undefined ) {

			cache.refs[ index ] = cache.uses[ index ] = 0;

		}

		cache.refs[ index ] ++;

	}

	/** Returns a reference to a shared resource, cloning it if necessary. */
	_getNodeRef( cache, index, object ) {

		if ( cache.refs[ index ] <= 1 ) return object;

		const ref = object.clone();

		// Propagates mappings to the cloned object, prevents mappings on the
		// original object from being lost.
		const updateMappings = ( original, clone ) => {

			const mappings = this.associations.get( original );
			if ( mappings != null ) {

				this.associations.set( clone, mappings );

			}

			for ( const [ i, child ] of original.children.entries() ) {

				updateMappings( child, clone.children[ i ] );

			}

		};

		updateMappings( object, ref );

		ref.name += '_instance_' + ( cache.uses[ index ] ++ );

		return ref;

	}

	_invokeOne( func ) {

		const extensions = Object.values( this.plugins );
		extensions.push( this );

		for ( let i = 0; i < extensions.length; i ++ ) {

			const result = func( extensions[ i ] );

			if ( result ) return result;

		}

		return null;

	}

	_invokeAll( func ) {

		const extensions = Object.values( this.plugins );
		extensions.unshift( this );

		const pending = [];

		for ( let i = 0; i < extensions.length; i ++ ) {

			const result = func( extensions[ i ] );

			if ( result ) pending.push( result );

		}

		return pending;

	}

	/**
	 * Requests the specified dependency asynchronously, with caching.
	 * @param {string} type
	 * @param {number} index
	 * @return {Promise<Object3D|Material|THREE.Texture|AnimationClip|ArrayBuffer|Object>}
	 */
	getDependency( type, index ) {

		const cacheKey = type + ':' + index;
		let dependency = this.cache.get( cacheKey );

		if ( ! dependency ) {

			switch ( type ) {

				case 'scene':
					dependency = this.loadScene( index );
					break;

				case 'node':
					dependency = this.loadNode( index );
					break;

				case 'mesh':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadMesh && ext.loadMesh( index );

					} );
					break;

				case 'accessor':
					dependency = this.loadAccessor( index );
					break;

				case 'bufferView':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadBufferView && ext.loadBufferView( index );

					} );
					break;

				case 'buffer':
					dependency = this.loadBuffer( index );
					break;

				case 'material':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadMaterial && ext.loadMaterial( index );

					} );
					break;

				case 'texture':
					dependency = this._invokeOne( function ( ext ) {

						return ext.loadTexture && ext.loadTexture( index );

					} );
					break;

				case 'skin':
					dependency = this.loadSkin( index );
					break;

				case 'animation':
					dependency = this.loadAnimation( index );
					break;

				case 'camera':
					dependency = this.loadCamera( index );
					break;

				default:
					throw new Error( 'Unknown type: ' + type );

			}

			this.cache.add( cacheKey, dependency );

		}

		return dependency;

	}

	/**
	 * Requests all dependencies of the specified type asynchronously, with caching.
	 * @param {string} type
	 * @return {Promise<Array<Object>>}
	 */
	getDependencies( type ) {

		let dependencies = this.cache.get( type );

		if ( ! dependencies ) {

			const parser = this;
			const defs = this.json[ type + ( type === 'mesh' ? 'es' : 's' ) ] || [];

			dependencies = Promise.all( defs.map( function ( def, index ) {

				return parser.getDependency( type, index );

			} ) );

			this.cache.add( type, dependencies );

		}

		return dependencies;

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
	 * @param {number} bufferIndex
	 * @return {Promise<ArrayBuffer>}
	 */
	loadBuffer( bufferIndex ) {

		const bufferDef = this.json.buffers[ bufferIndex ];
		const loader = this.fileLoader;

		if ( bufferDef.type && bufferDef.type !== 'arraybuffer' ) {

			throw new Error( 'THREE.GLTFLoader: ' + bufferDef.type + ' buffer type is not supported.' );

		}

		// If present, GLB container is required to be the first buffer.
		if ( bufferDef.uri === undefined && bufferIndex === 0 ) {

			return Promise.resolve( this.extensions[ EXTENSIONS.KHR_BINARY_GLTF ].body );

		}

		const options = this.options;

		return new Promise( function ( resolve, reject ) {

			loader.load( LoaderUtils.resolveURL( bufferDef.uri, options.path ), resolve, undefined, function () {

				reject( new Error( 'THREE.GLTFLoader: Failed to load buffer "' + bufferDef.uri + '".' ) );

			} );

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
	 * @param {number} bufferViewIndex
	 * @return {Promise<ArrayBuffer>}
	 */
	loadBufferView( bufferViewIndex ) {

		const bufferViewDef = this.json.bufferViews[ bufferViewIndex ];

		return this.getDependency( 'buffer', bufferViewDef.buffer ).then( function ( buffer ) {

			const byteLength = bufferViewDef.byteLength || 0;
			const byteOffset = bufferViewDef.byteOffset || 0;
			return buffer.slice( byteOffset, byteOffset + byteLength );

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#accessors
	 * @param {number} accessorIndex
	 * @return {Promise<BufferAttribute|InterleavedBufferAttribute>}
	 */
	loadAccessor( accessorIndex ) {

		const parser = this;
		const json = this.json;

		const accessorDef = this.json.accessors[ accessorIndex ];

		if ( accessorDef.bufferView === undefined && accessorDef.sparse === undefined ) {

			// Ignore empty accessors, which may be used to declare runtime
			// information about attributes coming from another source (e.g. Draco
			// compression extension).
			return Promise.resolve( null );

		}

		const pendingBufferViews = [];

		if ( accessorDef.bufferView !== undefined ) {

			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.bufferView ) );

		} else {

			pendingBufferViews.push( null );

		}

		if ( accessorDef.sparse !== undefined ) {

			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.sparse.indices.bufferView ) );
			pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.sparse.values.bufferView ) );

		}

		return Promise.all( pendingBufferViews ).then( function ( bufferViews ) {

			const bufferView = bufferViews[ 0 ];

			const itemSize = WEBGL_TYPE_SIZES[ accessorDef.type ];
			const TypedArray = WEBGL_COMPONENT_TYPES[ accessorDef.componentType ];

			// For VEC3: itemSize is 3, elementBytes is 4, itemBytes is 12.
			const elementBytes = TypedArray.BYTES_PER_ELEMENT;
			const itemBytes = elementBytes * itemSize;
			const byteOffset = accessorDef.byteOffset || 0;
			const byteStride = accessorDef.bufferView !== undefined ? json.bufferViews[ accessorDef.bufferView ].byteStride : undefined;
			const normalized = accessorDef.normalized === true;
			let array, bufferAttribute;

			// The buffer is not interleaved if the stride is the item size in bytes.
			if ( byteStride && byteStride !== itemBytes ) {

				// Each "slice" of the buffer, as defined by 'count' elements of 'byteStride' bytes, gets its own InterleavedBuffer
				// This makes sure that IBA.count reflects accessor.count properly
				const ibSlice = Math.floor( byteOffset / byteStride );
				const ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count;
				let ib = parser.cache.get( ibCacheKey );

				if ( ! ib ) {

					array = new TypedArray( bufferView, ibSlice * byteStride, accessorDef.count * byteStride / elementBytes );

					// Integer parameters to IB/IBA are in array elements, not bytes.
					ib = new InterleavedBuffer( array, byteStride / elementBytes );

					parser.cache.add( ibCacheKey, ib );

				}

				bufferAttribute = new InterleavedBufferAttribute( ib, itemSize, ( byteOffset % byteStride ) / elementBytes, normalized );

			} else {

				if ( bufferView === null ) {

					array = new TypedArray( accessorDef.count * itemSize );

				} else {

					array = new TypedArray( bufferView, byteOffset, accessorDef.count * itemSize );

				}

				bufferAttribute = new BufferAttribute( array, itemSize, normalized );

			}

			// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors
			if ( accessorDef.sparse !== undefined ) {

				const itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR;
				const TypedArrayIndices = WEBGL_COMPONENT_TYPES[ accessorDef.sparse.indices.componentType ];

				const byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0;
				const byteOffsetValues = accessorDef.sparse.values.byteOffset || 0;

				const sparseIndices = new TypedArrayIndices( bufferViews[ 1 ], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices );
				const sparseValues = new TypedArray( bufferViews[ 2 ], byteOffsetValues, accessorDef.sparse.count * itemSize );

				if ( bufferView !== null ) {

					// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
					bufferAttribute = new BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );

				}

				for ( let i = 0, il = sparseIndices.length; i < il; i ++ ) {

					const index = sparseIndices[ i ];

					bufferAttribute.setX( index, sparseValues[ i * itemSize ] );
					if ( itemSize >= 2 ) bufferAttribute.setY( index, sparseValues[ i * itemSize + 1 ] );
					if ( itemSize >= 3 ) bufferAttribute.setZ( index, sparseValues[ i * itemSize + 2 ] );
					if ( itemSize >= 4 ) bufferAttribute.setW( index, sparseValues[ i * itemSize + 3 ] );
					if ( itemSize >= 5 ) throw new Error( 'THREE.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.' );

				}

			}

			return bufferAttribute;

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
	 * @param {number} textureIndex
	 * @return {Promise<THREE.Texture>}
	 */
	loadTexture( textureIndex ) {

		const json = this.json;
		const options = this.options;
		const textureDef = json.textures[ textureIndex ];
		const source = json.images[ textureDef.source ];

		let loader = this.textureLoader;

		if ( source.uri ) {

			const handler = options.manager.getHandler( source.uri );
			if ( handler !== null ) loader = handler;

		}

		return this.loadTextureImage( textureIndex, source, loader );

	}

	loadTextureImage( textureIndex, source, loader ) {

		const parser = this;
		const json = this.json;
		const options = this.options;

		const textureDef = json.textures[ textureIndex ];

		const cacheKey = ( source.uri || source.bufferView ) + ':' + textureDef.sampler;

		if ( this.textureCache[ cacheKey ] ) {

			// See https://github.com/mrdoob/three.js/issues/21559.
			return this.textureCache[ cacheKey ];

		}

		const URL = self.URL || self.webkitURL;

		let sourceURI = source.uri || '';
		let isObjectURL = false;

		if ( source.bufferView !== undefined ) {

			// Load binary image data from bufferView, if provided.

			sourceURI = parser.getDependency( 'bufferView', source.bufferView ).then( function ( bufferView ) {

				isObjectURL = true;
				const blob = new Blob( [ bufferView ], { type: source.mimeType } );
				sourceURI = URL.createObjectURL( blob );
				return sourceURI;

			} );

		} else if ( source.uri === undefined ) {

			throw new Error( 'THREE.GLTFLoader: Image ' + textureIndex + ' is missing URI and bufferView' );

		}

		const promise = Promise.resolve( sourceURI ).then( function ( sourceURI ) {

			return new Promise( function ( resolve, reject ) {

				let onLoad = resolve;

				if ( loader.isImageBitmapLoader === true ) {

					onLoad = function ( imageBitmap ) {

						const texture = new Texture( imageBitmap );
						texture.needsUpdate = true;

						resolve( texture );

					};

				}

				loader.load( LoaderUtils.resolveURL( sourceURI, options.path ), onLoad, undefined, reject );

			} );

		} ).then( function ( texture ) {

			// Clean up resources and configure Texture.

			if ( isObjectURL === true ) {

				URL.revokeObjectURL( sourceURI );

			}

			texture.flipY = false;

			if ( textureDef.name ) texture.name = textureDef.name;

			const samplers = json.samplers || {};
			const sampler = samplers[ textureDef.sampler ] || {};

			texture.magFilter = WEBGL_FILTERS[ sampler.magFilter ] || LinearFilter;
			texture.minFilter = WEBGL_FILTERS[ sampler.minFilter ] || LinearMipmapLinearFilter;
			texture.wrapS = WEBGL_WRAPPINGS[ sampler.wrapS ] || RepeatWrapping;
			texture.wrapT = WEBGL_WRAPPINGS[ sampler.wrapT ] || RepeatWrapping;

			parser.associations.set( texture, { textures: textureIndex } );

			return texture;

		} ).catch( function () {

			console.error( 'THREE.GLTFLoader: Couldn\'t load texture', sourceURI );
			return null;

		} );

		this.textureCache[ cacheKey ] = promise;

		return promise;

	}

	/**
	 * Asynchronously assigns a texture to the given material parameters.
	 * @param {Object} materialParams
	 * @param {string} mapName
	 * @param {Object} mapDef
	 * @return {Promise<Texture>}
	 */
	assignTexture( materialParams, mapName, mapDef ) {

		const parser = this;

		return this.getDependency( 'texture', mapDef.index ).then( function ( texture ) {

			// Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured
			// However, we will copy UV set 0 to UV set 1 on demand for aoMap
			if ( mapDef.texCoord !== undefined && mapDef.texCoord != 0 && ! ( mapName === 'aoMap' && mapDef.texCoord == 1 ) ) {

				console.warn( 'THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.' );

			}

			if ( parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] ) {

				const transform = mapDef.extensions !== undefined ? mapDef.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] : undefined;

				if ( transform ) {

					const gltfReference = parser.associations.get( texture );
					texture = parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ].extendTexture( texture, transform );
					parser.associations.set( texture, gltfReference );

				}

			}

			materialParams[ mapName ] = texture;

			return texture;

		} );

	}

	/**
	 * Assigns final material to a Mesh, Line, or Points instance. The instance
	 * already has a material (generated from the glTF material options alone)
	 * but reuse of the same glTF material may require multiple threejs materials
	 * to accommodate different primitive types, defines, etc. New materials will
	 * be created if necessary, and reused from a cache.
	 * @param  {Object3D} mesh Mesh, Line, or Points instance.
	 */
	assignFinalMaterial( mesh ) {

		const geometry = mesh.geometry;
		let material = mesh.material;

		const useDerivativeTangents = geometry.attributes.tangent === undefined;
		const useVertexColors = geometry.attributes.color !== undefined;
		const useFlatShading = geometry.attributes.normal === undefined;

		if ( mesh.isPoints ) {

			const cacheKey = 'PointsMaterial:' + material.uuid;

			let pointsMaterial = this.cache.get( cacheKey );

			if ( ! pointsMaterial ) {

				pointsMaterial = new PointsMaterial();
				Material.prototype.copy.call( pointsMaterial, material );
				pointsMaterial.color.copy( material.color );
				pointsMaterial.map = material.map;
				pointsMaterial.sizeAttenuation = false; // glTF spec says points should be 1px

				this.cache.add( cacheKey, pointsMaterial );

			}

			material = pointsMaterial;

		} else if ( mesh.isLine ) {

			const cacheKey = 'LineBasicMaterial:' + material.uuid;

			let lineMaterial = this.cache.get( cacheKey );

			if ( ! lineMaterial ) {

				lineMaterial = new LineBasicMaterial();
				Material.prototype.copy.call( lineMaterial, material );
				lineMaterial.color.copy( material.color );

				this.cache.add( cacheKey, lineMaterial );

			}

			material = lineMaterial;

		}

		// Clone the material if it will be modified
		if ( useDerivativeTangents || useVertexColors || useFlatShading ) {

			let cacheKey = 'ClonedMaterial:' + material.uuid + ':';

			if ( material.isGLTFSpecularGlossinessMaterial ) cacheKey += 'specular-glossiness:';
			if ( useDerivativeTangents ) cacheKey += 'derivative-tangents:';
			if ( useVertexColors ) cacheKey += 'vertex-colors:';
			if ( useFlatShading ) cacheKey += 'flat-shading:';

			let cachedMaterial = this.cache.get( cacheKey );

			if ( ! cachedMaterial ) {

				cachedMaterial = material.clone();

				if ( useVertexColors ) cachedMaterial.vertexColors = true;
				if ( useFlatShading ) cachedMaterial.flatShading = true;

				if ( useDerivativeTangents ) {

					// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
					if ( cachedMaterial.normalScale ) cachedMaterial.normalScale.y *= - 1;
					if ( cachedMaterial.clearcoatNormalScale ) cachedMaterial.clearcoatNormalScale.y *= - 1;

				}

				this.cache.add( cacheKey, cachedMaterial );

				this.associations.set( cachedMaterial, this.associations.get( material ) );

			}

			material = cachedMaterial;

		}

		// workarounds for mesh and geometry

		if ( material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined ) {

			geometry.setAttribute( 'uv2', geometry.attributes.uv );

		}

		mesh.material = material;

	}

	getMaterialType( /* materialIndex */ ) {

		return MeshStandardMaterial;

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
	 * @param {number} materialIndex
	 * @return {Promise<Material>}
	 */
	loadMaterial( materialIndex ) {

		const parser = this;
		const json = this.json;
		const extensions = this.extensions;
		const materialDef = json.materials[ materialIndex ];

		let materialType;
		const materialParams = {};
		const materialExtensions = materialDef.extensions || {};

		const pending = [];

		if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ] ) {

			const sgExtension = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ];
			materialType = sgExtension.getMaterialType();
			pending.push( sgExtension.extendParams( materialParams, materialDef, parser ) );

		} else if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ] ) {

			const kmuExtension = extensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ];
			materialType = kmuExtension.getMaterialType();
			pending.push( kmuExtension.extendParams( materialParams, materialDef, parser ) );

		} else {

			// Specification:
			// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#metallic-roughness-material

			const metallicRoughness = materialDef.pbrMetallicRoughness || {};

			materialParams.color = new Color( 1.0, 1.0, 1.0 );
			materialParams.opacity = 1.0;

			if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

				const array = metallicRoughness.baseColorFactor;

				materialParams.color.fromArray( array );
				materialParams.opacity = array[ 3 ];

			}

			if ( metallicRoughness.baseColorTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

			}

			materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0;
			materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0;

			if ( metallicRoughness.metallicRoughnessTexture !== undefined ) {

				pending.push( parser.assignTexture( materialParams, 'metalnessMap', metallicRoughness.metallicRoughnessTexture ) );
				pending.push( parser.assignTexture( materialParams, 'roughnessMap', metallicRoughness.metallicRoughnessTexture ) );

			}

			materialType = this._invokeOne( function ( ext ) {

				return ext.getMaterialType && ext.getMaterialType( materialIndex );

			} );

			pending.push( Promise.all( this._invokeAll( function ( ext ) {

				return ext.extendMaterialParams && ext.extendMaterialParams( materialIndex, materialParams );

			} ) ) );

		}

		if ( materialDef.doubleSided === true ) {

			materialParams.side = DoubleSide;

		}

		const alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE;

		if ( alphaMode === ALPHA_MODES.BLEND ) {

			materialParams.transparent = true;

			// See: https://github.com/mrdoob/three.js/issues/17706
			materialParams.depthWrite = false;

		} else {

			materialParams.transparent = false;
			materialParams.alphaWrite = false;

			if ( alphaMode === ALPHA_MODES.MASK ) {

				materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5;

			}

		}

		if ( materialDef.normalTexture !== undefined && materialType !== MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) );

			materialParams.normalScale = new Vector2$1( 1, 1 );

			if ( materialDef.normalTexture.scale !== undefined ) {

				const scale = materialDef.normalTexture.scale;

				materialParams.normalScale.set( scale, scale );

			}

		}

		if ( materialDef.occlusionTexture !== undefined && materialType !== MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'aoMap', materialDef.occlusionTexture ) );

			if ( materialDef.occlusionTexture.strength !== undefined ) {

				materialParams.aoMapIntensity = materialDef.occlusionTexture.strength;

			}

		}

		if ( materialDef.emissiveFactor !== undefined && materialType !== MeshBasicMaterial ) {

			materialParams.emissive = new Color().fromArray( materialDef.emissiveFactor );

		}

		if ( materialDef.emissiveTexture !== undefined && materialType !== MeshBasicMaterial ) {

			pending.push( parser.assignTexture( materialParams, 'emissiveMap', materialDef.emissiveTexture ) );

		}

		return Promise.all( pending ).then( function () {

			let material;

			if ( materialType === GLTFMeshStandardSGMaterial ) {

				material = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ].createMaterial( materialParams );

			} else {

				material = new materialType( materialParams );

			}

			if ( materialDef.name ) material.name = materialDef.name;

			// baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding.
			if ( material.map ) material.map.encoding = sRGBEncoding;
			if ( material.emissiveMap ) material.emissiveMap.encoding = sRGBEncoding;

			assignExtrasToUserData( material, materialDef );

			parser.associations.set( material, { materials: materialIndex } );

			if ( materialDef.extensions ) addUnknownExtensionsToUserData( extensions, material, materialDef );

			return material;

		} );

	}

	/** When Object3D instances are targeted by animation, they need unique names. */
	createUniqueName( originalName ) {

		const sanitizedName = PropertyBinding.sanitizeNodeName( originalName || '' );

		let name = sanitizedName;

		for ( let i = 1; this.nodeNamesUsed[ name ]; ++ i ) {

			name = sanitizedName + '_' + i;

		}

		this.nodeNamesUsed[ name ] = true;

		return name;

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry
	 *
	 * Creates BufferGeometries from primitives.
	 *
	 * @param {Array<GLTF.Primitive>} primitives
	 * @return {Promise<Array<BufferGeometry>>}
	 */
	loadGeometries( primitives ) {

		const parser = this;
		const extensions = this.extensions;
		const cache = this.primitiveCache;

		function createDracoPrimitive( primitive ) {

			return extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ]
				.decodePrimitive( primitive, parser )
				.then( function ( geometry ) {

					return addPrimitiveAttributes( geometry, primitive, parser );

				} );

		}

		const pending = [];

		for ( let i = 0, il = primitives.length; i < il; i ++ ) {

			const primitive = primitives[ i ];
			const cacheKey = createPrimitiveKey( primitive );

			// See if we've already created this geometry
			const cached = cache[ cacheKey ];

			if ( cached ) {

				// Use the cached geometry if it exists
				pending.push( cached.promise );

			} else {

				let geometryPromise;

				if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {

					// Use DRACO geometry if available
					geometryPromise = createDracoPrimitive( primitive );

				} else {

					// Otherwise create a new geometry
					geometryPromise = addPrimitiveAttributes( new BufferGeometry(), primitive, parser );

				}

				// Cache this geometry
				cache[ cacheKey ] = { primitive: primitive, promise: geometryPromise };

				pending.push( geometryPromise );

			}

		}

		return Promise.all( pending );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
	 * @param {number} meshIndex
	 * @return {Promise<Group|Mesh|SkinnedMesh>}
	 */
	loadMesh( meshIndex ) {

		const parser = this;
		const json = this.json;
		const extensions = this.extensions;

		const meshDef = json.meshes[ meshIndex ];
		const primitives = meshDef.primitives;

		const pending = [];

		for ( let i = 0, il = primitives.length; i < il; i ++ ) {

			const material = primitives[ i ].material === undefined
				? createDefaultMaterial( this.cache )
				: this.getDependency( 'material', primitives[ i ].material );

			pending.push( material );

		}

		pending.push( parser.loadGeometries( primitives ) );

		return Promise.all( pending ).then( function ( results ) {

			const materials = results.slice( 0, results.length - 1 );
			const geometries = results[ results.length - 1 ];

			const meshes = [];

			for ( let i = 0, il = geometries.length; i < il; i ++ ) {

				const geometry = geometries[ i ];
				const primitive = primitives[ i ];

				// 1. create Mesh

				let mesh;

				const material = materials[ i ];

				if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLES ||
						primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ||
						primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ||
						primitive.mode === undefined ) {

					// .isSkinnedMesh isn't in glTF spec. See ._markDefs()
					mesh = meshDef.isSkinnedMesh === true
						? new SkinnedMesh( geometry, material )
						: new Mesh( geometry, material );

					if ( mesh.isSkinnedMesh === true && ! mesh.geometry.attributes.skinWeight.normalized ) {

						// we normalize floating point skin weight array to fix malformed assets (see #15319)
						// it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs
						mesh.normalizeSkinWeights();

					}

					if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ) {

						mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleStripDrawMode );

					} else if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ) {

						mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleFanDrawMode );

					}

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINES ) {

					mesh = new LineSegments( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_STRIP ) {

					mesh = new Line( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_LOOP ) {

					mesh = new LineLoop( geometry, material );

				} else if ( primitive.mode === WEBGL_CONSTANTS.POINTS ) {

					mesh = new Points( geometry, material );

				} else {

					throw new Error( 'THREE.GLTFLoader: Primitive mode unsupported: ' + primitive.mode );

				}

				if ( Object.keys( mesh.geometry.morphAttributes ).length > 0 ) {

					updateMorphTargets( mesh, meshDef );

				}

				mesh.name = parser.createUniqueName( meshDef.name || ( 'mesh_' + meshIndex ) );

				assignExtrasToUserData( mesh, meshDef );

				if ( primitive.extensions ) addUnknownExtensionsToUserData( extensions, mesh, primitive );

				parser.assignFinalMaterial( mesh );

				meshes.push( mesh );

			}

			for ( let i = 0, il = meshes.length; i < il; i ++ ) {

				parser.associations.set( meshes[ i ], {
					meshes: meshIndex,
					primitives: i
				} );

			}

			if ( meshes.length === 1 ) {

				return meshes[ 0 ];

			}

			const group = new Group();

			parser.associations.set( group, { meshes: meshIndex } );

			for ( let i = 0, il = meshes.length; i < il; i ++ ) {

				group.add( meshes[ i ] );

			}

			return group;

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#cameras
	 * @param {number} cameraIndex
	 * @return {Promise<THREE.Camera>}
	 */
	loadCamera( cameraIndex ) {

		let camera;
		const cameraDef = this.json.cameras[ cameraIndex ];
		const params = cameraDef[ cameraDef.type ];

		if ( ! params ) {

			console.warn( 'THREE.GLTFLoader: Missing camera parameters.' );
			return;

		}

		if ( cameraDef.type === 'perspective' ) {

			camera = new PerspectiveCamera( MathUtils.radToDeg( params.yfov ), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6 );

		} else if ( cameraDef.type === 'orthographic' ) {

			camera = new OrthographicCamera( - params.xmag, params.xmag, params.ymag, - params.ymag, params.znear, params.zfar );

		}

		if ( cameraDef.name ) camera.name = this.createUniqueName( cameraDef.name );

		assignExtrasToUserData( camera, cameraDef );

		return Promise.resolve( camera );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins
	 * @param {number} skinIndex
	 * @return {Promise<Object>}
	 */
	loadSkin( skinIndex ) {

		const skinDef = this.json.skins[ skinIndex ];

		const skinEntry = { joints: skinDef.joints };

		if ( skinDef.inverseBindMatrices === undefined ) {

			return Promise.resolve( skinEntry );

		}

		return this.getDependency( 'accessor', skinDef.inverseBindMatrices ).then( function ( accessor ) {

			skinEntry.inverseBindMatrices = accessor;

			return skinEntry;

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations
	 * @param {number} animationIndex
	 * @return {Promise<AnimationClip>}
	 */
	loadAnimation( animationIndex ) {

		const json = this.json;

		const animationDef = json.animations[ animationIndex ];

		const pendingNodes = [];
		const pendingInputAccessors = [];
		const pendingOutputAccessors = [];
		const pendingSamplers = [];
		const pendingTargets = [];

		for ( let i = 0, il = animationDef.channels.length; i < il; i ++ ) {

			const channel = animationDef.channels[ i ];
			const sampler = animationDef.samplers[ channel.sampler ];
			const target = channel.target;
			const name = target.node !== undefined ? target.node : target.id; // NOTE: target.id is deprecated.
			const input = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.input ] : sampler.input;
			const output = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.output ] : sampler.output;

			pendingNodes.push( this.getDependency( 'node', name ) );
			pendingInputAccessors.push( this.getDependency( 'accessor', input ) );
			pendingOutputAccessors.push( this.getDependency( 'accessor', output ) );
			pendingSamplers.push( sampler );
			pendingTargets.push( target );

		}

		return Promise.all( [

			Promise.all( pendingNodes ),
			Promise.all( pendingInputAccessors ),
			Promise.all( pendingOutputAccessors ),
			Promise.all( pendingSamplers ),
			Promise.all( pendingTargets )

		] ).then( function ( dependencies ) {

			const nodes = dependencies[ 0 ];
			const inputAccessors = dependencies[ 1 ];
			const outputAccessors = dependencies[ 2 ];
			const samplers = dependencies[ 3 ];
			const targets = dependencies[ 4 ];

			const tracks = [];

			for ( let i = 0, il = nodes.length; i < il; i ++ ) {

				const node = nodes[ i ];
				const inputAccessor = inputAccessors[ i ];
				const outputAccessor = outputAccessors[ i ];
				const sampler = samplers[ i ];
				const target = targets[ i ];

				if ( node === undefined ) continue;

				node.updateMatrix();
				node.matrixAutoUpdate = true;

				let TypedKeyframeTrack;

				switch ( PATH_PROPERTIES[ target.path ] ) {

					case PATH_PROPERTIES.weights:

						TypedKeyframeTrack = NumberKeyframeTrack;
						break;

					case PATH_PROPERTIES.rotation:

						TypedKeyframeTrack = QuaternionKeyframeTrack;
						break;

					case PATH_PROPERTIES.position:
					case PATH_PROPERTIES.scale:
					default:

						TypedKeyframeTrack = VectorKeyframeTrack;
						break;

				}

				const targetName = node.name ? node.name : node.uuid;

				const interpolation = sampler.interpolation !== undefined ? INTERPOLATION[ sampler.interpolation ] : InterpolateLinear;

				const targetNames = [];

				if ( PATH_PROPERTIES[ target.path ] === PATH_PROPERTIES.weights ) {

					node.traverse( function ( object ) {

						if ( object.morphTargetInfluences ) {

							targetNames.push( object.name ? object.name : object.uuid );

						}

					} );

				} else {

					targetNames.push( targetName );

				}

				let outputArray = outputAccessor.array;

				if ( outputAccessor.normalized ) {

					const scale = getNormalizedComponentScale( outputArray.constructor );
					const scaled = new Float32Array( outputArray.length );

					for ( let j = 0, jl = outputArray.length; j < jl; j ++ ) {

						scaled[ j ] = outputArray[ j ] * scale;

					}

					outputArray = scaled;

				}

				for ( let j = 0, jl = targetNames.length; j < jl; j ++ ) {

					const track = new TypedKeyframeTrack(
						targetNames[ j ] + '.' + PATH_PROPERTIES[ target.path ],
						inputAccessor.array,
						outputArray,
						interpolation
					);

					// Override interpolation with custom factory method.
					if ( sampler.interpolation === 'CUBICSPLINE' ) {

						track.createInterpolant = function InterpolantFactoryMethodGLTFCubicSpline( result ) {

							// A CUBICSPLINE keyframe in glTF has three output values for each input value,
							// representing inTangent, splineVertex, and outTangent. As a result, track.getValueSize()
							// must be divided by three to get the interpolant's sampleSize argument.

							const interpolantType = ( this instanceof QuaternionKeyframeTrack ) ? GLTFCubicSplineQuaternionInterpolant : GLTFCubicSplineInterpolant;

							return new interpolantType( this.times, this.values, this.getValueSize() / 3, result );

						};

						// Mark as CUBICSPLINE. `track.getInterpolation()` doesn't support custom interpolants.
						track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline = true;

					}

					tracks.push( track );

				}

			}

			const name = animationDef.name ? animationDef.name : 'animation_' + animationIndex;

			return new AnimationClip( name, undefined, tracks );

		} );

	}

	createNodeMesh( nodeIndex ) {

		const json = this.json;
		const parser = this;
		const nodeDef = json.nodes[ nodeIndex ];

		if ( nodeDef.mesh === undefined ) return null;

		return parser.getDependency( 'mesh', nodeDef.mesh ).then( function ( mesh ) {

			const node = parser._getNodeRef( parser.meshCache, nodeDef.mesh, mesh );

			// if weights are provided on the node, override weights on the mesh.
			if ( nodeDef.weights !== undefined ) {

				node.traverse( function ( o ) {

					if ( ! o.isMesh ) return;

					for ( let i = 0, il = nodeDef.weights.length; i < il; i ++ ) {

						o.morphTargetInfluences[ i ] = nodeDef.weights[ i ];

					}

				} );

			}

			return node;

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
	 * @param {number} nodeIndex
	 * @return {Promise<Object3D>}
	 */
	loadNode( nodeIndex ) {

		const json = this.json;
		const extensions = this.extensions;
		const parser = this;

		const nodeDef = json.nodes[ nodeIndex ];

		// reserve node's name before its dependencies, so the root has the intended name.
		const nodeName = nodeDef.name ? parser.createUniqueName( nodeDef.name ) : '';

		return ( function () {

			const pending = [];

			const meshPromise = parser._invokeOne( function ( ext ) {

				return ext.createNodeMesh && ext.createNodeMesh( nodeIndex );

			} );

			if ( meshPromise ) {

				pending.push( meshPromise );

			}

			if ( nodeDef.camera !== undefined ) {

				pending.push( parser.getDependency( 'camera', nodeDef.camera ).then( function ( camera ) {

					return parser._getNodeRef( parser.cameraCache, nodeDef.camera, camera );

				} ) );

			}

			parser._invokeAll( function ( ext ) {

				return ext.createNodeAttachment && ext.createNodeAttachment( nodeIndex );

			} ).forEach( function ( promise ) {

				pending.push( promise );

			} );

			return Promise.all( pending );

		}() ).then( function ( objects ) {

			let node;

			// .isBone isn't in glTF spec. See ._markDefs
			if ( nodeDef.isBone === true ) {

				node = new Bone();

			} else if ( objects.length > 1 ) {

				node = new Group();

			} else if ( objects.length === 1 ) {

				node = objects[ 0 ];

			} else {

				node = new Object3D();

			}

			if ( node !== objects[ 0 ] ) {

				for ( let i = 0, il = objects.length; i < il; i ++ ) {

					node.add( objects[ i ] );

				}

			}

			if ( nodeDef.name ) {

				node.userData.name = nodeDef.name;
				node.name = nodeName;

			}

			assignExtrasToUserData( node, nodeDef );

			if ( nodeDef.extensions ) addUnknownExtensionsToUserData( extensions, node, nodeDef );

			if ( nodeDef.matrix !== undefined ) {

				const matrix = new Matrix4$1();
				matrix.fromArray( nodeDef.matrix );
				node.applyMatrix4( matrix );

			} else {

				if ( nodeDef.translation !== undefined ) {

					node.position.fromArray( nodeDef.translation );

				}

				if ( nodeDef.rotation !== undefined ) {

					node.quaternion.fromArray( nodeDef.rotation );

				}

				if ( nodeDef.scale !== undefined ) {

					node.scale.fromArray( nodeDef.scale );

				}

			}

			if ( ! parser.associations.has( node ) ) {

				parser.associations.set( node, {} );

			}

			parser.associations.get( node ).nodes = nodeIndex;

			return node;

		} );

	}

	/**
	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
	 * @param {number} sceneIndex
	 * @return {Promise<Group>}
	 */
	loadScene( sceneIndex ) {

		const json = this.json;
		const extensions = this.extensions;
		const sceneDef = this.json.scenes[ sceneIndex ];
		const parser = this;

		// Loader returns Group, not Scene.
		// See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172
		const scene = new Group();
		if ( sceneDef.name ) scene.name = parser.createUniqueName( sceneDef.name );

		assignExtrasToUserData( scene, sceneDef );

		if ( sceneDef.extensions ) addUnknownExtensionsToUserData( extensions, scene, sceneDef );

		const nodeIds = sceneDef.nodes || [];

		const pending = [];

		for ( let i = 0, il = nodeIds.length; i < il; i ++ ) {

			pending.push( buildNodeHierarchy( nodeIds[ i ], scene, json, parser ) );

		}

		return Promise.all( pending ).then( function () {

			// Removes dangling associations, associations that reference a node that
			// didn't make it into the scene.
			const reduceAssociations = ( node ) => {

				const reducedAssociations = new Map();

				for ( const [ key, value ] of parser.associations ) {

					if ( key instanceof Material || key instanceof Texture ) {

						reducedAssociations.set( key, value );

					}

				}

				node.traverse( ( node ) => {

					const mappings = parser.associations.get( node );

					if ( mappings != null ) {

						reducedAssociations.set( node, mappings );

					}

				} );

				return reducedAssociations;

			};

			parser.associations = reduceAssociations( scene );

			return scene;

		} );

	}

}

function buildNodeHierarchy( nodeId, parentObject, json, parser ) {

	const nodeDef = json.nodes[ nodeId ];

	return parser.getDependency( 'node', nodeId ).then( function ( node ) {

		if ( nodeDef.skin === undefined ) return node;

		// build skeleton here as well

		let skinEntry;

		return parser.getDependency( 'skin', nodeDef.skin ).then( function ( skin ) {

			skinEntry = skin;

			const pendingJoints = [];

			for ( let i = 0, il = skinEntry.joints.length; i < il; i ++ ) {

				pendingJoints.push( parser.getDependency( 'node', skinEntry.joints[ i ] ) );

			}

			return Promise.all( pendingJoints );

		} ).then( function ( jointNodes ) {

			node.traverse( function ( mesh ) {

				if ( ! mesh.isMesh ) return;

				const bones = [];
				const boneInverses = [];

				for ( let j = 0, jl = jointNodes.length; j < jl; j ++ ) {

					const jointNode = jointNodes[ j ];

					if ( jointNode ) {

						bones.push( jointNode );

						const mat = new Matrix4$1();

						if ( skinEntry.inverseBindMatrices !== undefined ) {

							mat.fromArray( skinEntry.inverseBindMatrices.array, j * 16 );

						}

						boneInverses.push( mat );

					} else {

						console.warn( 'THREE.GLTFLoader: Joint "%s" could not be found.', skinEntry.joints[ j ] );

					}

				}

				mesh.bind( new Skeleton( bones, boneInverses ), mesh.matrixWorld );

			} );

			return node;

		} );

	} ).then( function ( node ) {

		// build node hierachy

		parentObject.add( node );

		const pending = [];

		if ( nodeDef.children ) {

			const children = nodeDef.children;

			for ( let i = 0, il = children.length; i < il; i ++ ) {

				const child = children[ i ];
				pending.push( buildNodeHierarchy( child, node, json, parser ) );

			}

		}

		return Promise.all( pending );

	} );

}

/**
 * @param {BufferGeometry} geometry
 * @param {GLTF.Primitive} primitiveDef
 * @param {GLTFParser} parser
 */
function computeBounds( geometry, primitiveDef, parser ) {

	const attributes = primitiveDef.attributes;

	const box = new Box3();

	if ( attributes.POSITION !== undefined ) {

		const accessor = parser.json.accessors[ attributes.POSITION ];

		const min = accessor.min;
		const max = accessor.max;

		// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

		if ( min !== undefined && max !== undefined ) {

			box.set(
				new Vector3$1( min[ 0 ], min[ 1 ], min[ 2 ] ),
				new Vector3$1( max[ 0 ], max[ 1 ], max[ 2 ] )
			);

			if ( accessor.normalized ) {

				const boxScale = getNormalizedComponentScale( WEBGL_COMPONENT_TYPES[ accessor.componentType ] );
				box.min.multiplyScalar( boxScale );
				box.max.multiplyScalar( boxScale );

			}

		} else {

			console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );

			return;

		}

	} else {

		return;

	}

	const targets = primitiveDef.targets;

	if ( targets !== undefined ) {

		const maxDisplacement = new Vector3$1();
		const vector = new Vector3$1();

		for ( let i = 0, il = targets.length; i < il; i ++ ) {

			const target = targets[ i ];

			if ( target.POSITION !== undefined ) {

				const accessor = parser.json.accessors[ target.POSITION ];
				const min = accessor.min;
				const max = accessor.max;

				// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

				if ( min !== undefined && max !== undefined ) {

					// we need to get max of absolute components because target weight is [-1,1]
					vector.setX( Math.max( Math.abs( min[ 0 ] ), Math.abs( max[ 0 ] ) ) );
					vector.setY( Math.max( Math.abs( min[ 1 ] ), Math.abs( max[ 1 ] ) ) );
					vector.setZ( Math.max( Math.abs( min[ 2 ] ), Math.abs( max[ 2 ] ) ) );


					if ( accessor.normalized ) {

						const boxScale = getNormalizedComponentScale( WEBGL_COMPONENT_TYPES[ accessor.componentType ] );
						vector.multiplyScalar( boxScale );

					}

					// Note: this assumes that the sum of all weights is at most 1. This isn't quite correct - it's more conservative
					// to assume that each target can have a max weight of 1. However, for some use cases - notably, when morph targets
					// are used to implement key-frame animations and as such only two are active at a time - this results in very large
					// boxes. So for now we make a box that's sometimes a touch too small but is hopefully mostly of reasonable size.
					maxDisplacement.max( vector );

				} else {

					console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );

				}

			}

		}

		// As per comment above this box isn't conservative, but has a reasonable size for a very large number of morph targets.
		box.expandByVector( maxDisplacement );

	}

	geometry.boundingBox = box;

	const sphere = new Sphere();

	box.getCenter( sphere.center );
	sphere.radius = box.min.distanceTo( box.max ) / 2;

	geometry.boundingSphere = sphere;

}

/**
 * @param {BufferGeometry} geometry
 * @param {GLTF.Primitive} primitiveDef
 * @param {GLTFParser} parser
 * @return {Promise<BufferGeometry>}
 */
function addPrimitiveAttributes( geometry, primitiveDef, parser ) {

	const attributes = primitiveDef.attributes;

	const pending = [];

	function assignAttributeAccessor( accessorIndex, attributeName ) {

		return parser.getDependency( 'accessor', accessorIndex )
			.then( function ( accessor ) {

				geometry.setAttribute( attributeName, accessor );

			} );

	}

	for ( const gltfAttributeName in attributes ) {

		const threeAttributeName = ATTRIBUTES[ gltfAttributeName ] || gltfAttributeName.toLowerCase();

		// Skip attributes already provided by e.g. Draco extension.
		if ( threeAttributeName in geometry.attributes ) continue;

		pending.push( assignAttributeAccessor( attributes[ gltfAttributeName ], threeAttributeName ) );

	}

	if ( primitiveDef.indices !== undefined && ! geometry.index ) {

		const accessor = parser.getDependency( 'accessor', primitiveDef.indices ).then( function ( accessor ) {

			geometry.setIndex( accessor );

		} );

		pending.push( accessor );

	}

	assignExtrasToUserData( geometry, primitiveDef );

	computeBounds( geometry, primitiveDef, parser );

	return Promise.all( pending ).then( function () {

		return primitiveDef.targets !== undefined
			? addMorphTargets( geometry, primitiveDef.targets, parser )
			: geometry;

	} );

}

/**
 * @param {BufferGeometry} geometry
 * @param {Number} drawMode
 * @return {BufferGeometry}
 */
function toTrianglesDrawMode( geometry, drawMode ) {

	let index = geometry.getIndex();

	// generate index if not present

	if ( index === null ) {

		const indices = [];

		const position = geometry.getAttribute( 'position' );

		if ( position !== undefined ) {

			for ( let i = 0; i < position.count; i ++ ) {

				indices.push( i );

			}

			geometry.setIndex( indices );
			index = geometry.getIndex();

		} else {

			console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );
			return geometry;

		}

	}

	//

	const numberOfTriangles = index.count - 2;
	const newIndices = [];

	if ( drawMode === TriangleFanDrawMode ) {

		// gl.TRIANGLE_FAN

		for ( let i = 1; i <= numberOfTriangles; i ++ ) {

			newIndices.push( index.getX( 0 ) );
			newIndices.push( index.getX( i ) );
			newIndices.push( index.getX( i + 1 ) );

		}

	} else {

		// gl.TRIANGLE_STRIP

		for ( let i = 0; i < numberOfTriangles; i ++ ) {

			if ( i % 2 === 0 ) {

				newIndices.push( index.getX( i ) );
				newIndices.push( index.getX( i + 1 ) );
				newIndices.push( index.getX( i + 2 ) );


			} else {

				newIndices.push( index.getX( i + 2 ) );
				newIndices.push( index.getX( i + 1 ) );
				newIndices.push( index.getX( i ) );

			}

		}

	}

	if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {

		console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );

	}

	// build final geometry

	const newGeometry = geometry.clone();
	newGeometry.setIndex( newIndices );

	return newGeometry;

}

const _taskCache$1 = new WeakMap();

class DRACOLoader extends Loader {

	constructor( manager ) {

		super( manager );

		this.decoderPath = '';
		this.decoderConfig = {};
		this.decoderBinary = null;
		this.decoderPending = null;

		this.workerLimit = 4;
		this.workerPool = [];
		this.workerNextTaskID = 1;
		this.workerSourceURL = '';

		this.defaultAttributeIDs = {
			position: 'POSITION',
			normal: 'NORMAL',
			color: 'COLOR',
			uv: 'TEX_COORD'
		};
		this.defaultAttributeTypes = {
			position: 'Float32Array',
			normal: 'Float32Array',
			color: 'Float32Array',
			uv: 'Float32Array'
		};

	}

	setDecoderPath( path ) {

		this.decoderPath = path;

		return this;

	}

	setDecoderConfig( config ) {

		this.decoderConfig = config;

		return this;

	}

	setWorkerLimit( workerLimit ) {

		this.workerLimit = workerLimit;

		return this;

	}

	load( url, onLoad, onProgress, onError ) {

		const loader = new FileLoader( this.manager );

		loader.setPath( this.path );
		loader.setResponseType( 'arraybuffer' );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );

		loader.load( url, ( buffer ) => {

			const taskConfig = {
				attributeIDs: this.defaultAttributeIDs,
				attributeTypes: this.defaultAttributeTypes,
				useUniqueIDs: false
			};

			this.decodeGeometry( buffer, taskConfig )
				.then( onLoad )
				.catch( onError );

		}, onProgress, onError );

	}

	/** @deprecated Kept for backward-compatibility with previous DRACOLoader versions. */
	decodeDracoFile( buffer, callback, attributeIDs, attributeTypes ) {

		const taskConfig = {
			attributeIDs: attributeIDs || this.defaultAttributeIDs,
			attributeTypes: attributeTypes || this.defaultAttributeTypes,
			useUniqueIDs: !! attributeIDs
		};

		this.decodeGeometry( buffer, taskConfig ).then( callback );

	}

	decodeGeometry( buffer, taskConfig ) {

		// TODO: For backward-compatibility, support 'attributeTypes' objects containing
		// references (rather than names) to typed array constructors. These must be
		// serialized before sending them to the worker.
		for ( const attribute in taskConfig.attributeTypes ) {

			const type = taskConfig.attributeTypes[ attribute ];

			if ( type.BYTES_PER_ELEMENT !== undefined ) {

				taskConfig.attributeTypes[ attribute ] = type.name;

			}

		}

		//

		const taskKey = JSON.stringify( taskConfig );

		// Check for an existing task using this buffer. A transferred buffer cannot be transferred
		// again from this thread.
		if ( _taskCache$1.has( buffer ) ) {

			const cachedTask = _taskCache$1.get( buffer );

			if ( cachedTask.key === taskKey ) {

				return cachedTask.promise;

			} else if ( buffer.byteLength === 0 ) {

				// Technically, it would be possible to wait for the previous task to complete,
				// transfer the buffer back, and decode again with the second configuration. That
				// is complex, and I don't know of any reason to decode a Draco buffer twice in
				// different ways, so this is left unimplemented.
				throw new Error(

					'THREE.DRACOLoader: Unable to re-decode a buffer with different ' +
					'settings. Buffer has already been transferred.'

				);

			}

		}

		//

		let worker;
		const taskID = this.workerNextTaskID ++;
		const taskCost = buffer.byteLength;

		// Obtain a worker and assign a task, and construct a geometry instance
		// when the task completes.
		const geometryPending = this._getWorker( taskID, taskCost )
			.then( ( _worker ) => {

				worker = _worker;

				return new Promise( ( resolve, reject ) => {

					worker._callbacks[ taskID ] = { resolve, reject };

					worker.postMessage( { type: 'decode', id: taskID, taskConfig, buffer }, [ buffer ] );

					// this.debug();

				} );

			} )
			.then( ( message ) => this._createGeometry( message.geometry ) );

		// Remove task from the task list.
		// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
		geometryPending
			.catch( () => true )
			.then( () => {

				if ( worker && taskID ) {

					this._releaseTask( worker, taskID );

					// this.debug();

				}

			} );

		// Cache the task result.
		_taskCache$1.set( buffer, {

			key: taskKey,
			promise: geometryPending

		} );

		return geometryPending;

	}

	_createGeometry( geometryData ) {

		const geometry = new BufferGeometry();

		if ( geometryData.index ) {

			geometry.setIndex( new BufferAttribute( geometryData.index.array, 1 ) );

		}

		for ( let i = 0; i < geometryData.attributes.length; i ++ ) {

			const attribute = geometryData.attributes[ i ];
			const name = attribute.name;
			const array = attribute.array;
			const itemSize = attribute.itemSize;

			geometry.setAttribute( name, new BufferAttribute( array, itemSize ) );

		}

		return geometry;

	}

	_loadLibrary( url, responseType ) {

		const loader = new FileLoader( this.manager );
		loader.setPath( this.decoderPath );
		loader.setResponseType( responseType );
		loader.setWithCredentials( this.withCredentials );

		return new Promise( ( resolve, reject ) => {

			loader.load( url, resolve, undefined, reject );

		} );

	}

	preload() {

		this._initDecoder();

		return this;

	}

	_initDecoder() {

		if ( this.decoderPending ) return this.decoderPending;

		const useJS = typeof WebAssembly !== 'object' || this.decoderConfig.type === 'js';
		const librariesPending = [];

		if ( useJS ) {

			librariesPending.push( this._loadLibrary( 'draco_decoder.js', 'text' ) );

		} else {

			librariesPending.push( this._loadLibrary( 'draco_wasm_wrapper.js', 'text' ) );
			librariesPending.push( this._loadLibrary( 'draco_decoder.wasm', 'arraybuffer' ) );

		}

		this.decoderPending = Promise.all( librariesPending )
			.then( ( libraries ) => {

				const jsContent = libraries[ 0 ];

				if ( ! useJS ) {

					this.decoderConfig.wasmBinary = libraries[ 1 ];

				}

				const fn = DRACOWorker.toString();

				const body = [
					'/* draco decoder */',
					jsContent,
					'',
					'/* worker */',
					fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
				].join( '\n' );

				this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );

			} );

		return this.decoderPending;

	}

	_getWorker( taskID, taskCost ) {

		return this._initDecoder().then( () => {

			if ( this.workerPool.length < this.workerLimit ) {

				const worker = new Worker( this.workerSourceURL );

				worker._callbacks = {};
				worker._taskCosts = {};
				worker._taskLoad = 0;

				worker.postMessage( { type: 'init', decoderConfig: this.decoderConfig } );

				worker.onmessage = function ( e ) {

					const message = e.data;

					switch ( message.type ) {

						case 'decode':
							worker._callbacks[ message.id ].resolve( message );
							break;

						case 'error':
							worker._callbacks[ message.id ].reject( message );
							break;

						default:
							console.error( 'THREE.DRACOLoader: Unexpected message, "' + message.type + '"' );

					}

				};

				this.workerPool.push( worker );

			} else {

				this.workerPool.sort( function ( a, b ) {

					return a._taskLoad > b._taskLoad ? - 1 : 1;

				} );

			}

			const worker = this.workerPool[ this.workerPool.length - 1 ];
			worker._taskCosts[ taskID ] = taskCost;
			worker._taskLoad += taskCost;
			return worker;

		} );

	}

	_releaseTask( worker, taskID ) {

		worker._taskLoad -= worker._taskCosts[ taskID ];
		delete worker._callbacks[ taskID ];
		delete worker._taskCosts[ taskID ];

	}

	debug() {

		console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );

	}

	dispose() {

		for ( let i = 0; i < this.workerPool.length; ++ i ) {

			this.workerPool[ i ].terminate();

		}

		this.workerPool.length = 0;

		return this;

	}

}

/* WEB WORKER */

function DRACOWorker() {

	let decoderConfig;
	let decoderPending;

	onmessage = function ( e ) {

		const message = e.data;

		switch ( message.type ) {

			case 'init':
				decoderConfig = message.decoderConfig;
				decoderPending = new Promise( function ( resolve/*, reject*/ ) {

					decoderConfig.onModuleLoaded = function ( draco ) {

						// Module is Promise-like. Wrap before resolving to avoid loop.
						resolve( { draco: draco } );

					};

					DracoDecoderModule( decoderConfig ); // eslint-disable-line no-undef

				} );
				break;

			case 'decode':
				const buffer = message.buffer;
				const taskConfig = message.taskConfig;
				decoderPending.then( ( module ) => {

					const draco = module.draco;
					const decoder = new draco.Decoder();
					const decoderBuffer = new draco.DecoderBuffer();
					decoderBuffer.Init( new Int8Array( buffer ), buffer.byteLength );

					try {

						const geometry = decodeGeometry( draco, decoder, decoderBuffer, taskConfig );

						const buffers = geometry.attributes.map( ( attr ) => attr.array.buffer );

						if ( geometry.index ) buffers.push( geometry.index.array.buffer );

						self.postMessage( { type: 'decode', id: message.id, geometry }, buffers );

					} catch ( error ) {

						console.error( error );

						self.postMessage( { type: 'error', id: message.id, error: error.message } );

					} finally {

						draco.destroy( decoderBuffer );
						draco.destroy( decoder );

					}

				} );
				break;

		}

	};

	function decodeGeometry( draco, decoder, decoderBuffer, taskConfig ) {

		const attributeIDs = taskConfig.attributeIDs;
		const attributeTypes = taskConfig.attributeTypes;

		let dracoGeometry;
		let decodingStatus;

		const geometryType = decoder.GetEncodedGeometryType( decoderBuffer );

		if ( geometryType === draco.TRIANGULAR_MESH ) {

			dracoGeometry = new draco.Mesh();
			decodingStatus = decoder.DecodeBufferToMesh( decoderBuffer, dracoGeometry );

		} else if ( geometryType === draco.POINT_CLOUD ) {

			dracoGeometry = new draco.PointCloud();
			decodingStatus = decoder.DecodeBufferToPointCloud( decoderBuffer, dracoGeometry );

		} else {

			throw new Error( 'THREE.DRACOLoader: Unexpected geometry type.' );

		}

		if ( ! decodingStatus.ok() || dracoGeometry.ptr === 0 ) {

			throw new Error( 'THREE.DRACOLoader: Decoding failed: ' + decodingStatus.error_msg() );

		}

		const geometry = { index: null, attributes: [] };

		// Gather all vertex attributes.
		for ( const attributeName in attributeIDs ) {

			const attributeType = self[ attributeTypes[ attributeName ] ];

			let attribute;
			let attributeID;

			// A Draco file may be created with default vertex attributes, whose attribute IDs
			// are mapped 1:1 from their semantic name (POSITION, NORMAL, ...). Alternatively,
			// a Draco file may contain a custom set of attributes, identified by known unique
			// IDs. glTF files always do the latter, and `.drc` files typically do the former.
			if ( taskConfig.useUniqueIDs ) {

				attributeID = attributeIDs[ attributeName ];
				attribute = decoder.GetAttributeByUniqueId( dracoGeometry, attributeID );

			} else {

				attributeID = decoder.GetAttributeId( dracoGeometry, draco[ attributeIDs[ attributeName ] ] );

				if ( attributeID === - 1 ) continue;

				attribute = decoder.GetAttribute( dracoGeometry, attributeID );

			}

			geometry.attributes.push( decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) );

		}

		// Add index.
		if ( geometryType === draco.TRIANGULAR_MESH ) {

			geometry.index = decodeIndex( draco, decoder, dracoGeometry );

		}

		draco.destroy( dracoGeometry );

		return geometry;

	}

	function decodeIndex( draco, decoder, dracoGeometry ) {

		const numFaces = dracoGeometry.num_faces();
		const numIndices = numFaces * 3;
		const byteLength = numIndices * 4;

		const ptr = draco._malloc( byteLength );
		decoder.GetTrianglesUInt32Array( dracoGeometry, byteLength, ptr );
		const index = new Uint32Array( draco.HEAPF32.buffer, ptr, numIndices ).slice();
		draco._free( ptr );

		return { array: index, itemSize: 1 };

	}

	function decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) {

		const numComponents = attribute.num_components();
		const numPoints = dracoGeometry.num_points();
		const numValues = numPoints * numComponents;
		const byteLength = numValues * attributeType.BYTES_PER_ELEMENT;
		const dataType = getDracoDataType( draco, attributeType );

		const ptr = draco._malloc( byteLength );
		decoder.GetAttributeDataArrayForAllPoints( dracoGeometry, attribute, dataType, byteLength, ptr );
		const array = new attributeType( draco.HEAPF32.buffer, ptr, numValues ).slice();
		draco._free( ptr );

		return {
			name: attributeName,
			array: array,
			itemSize: numComponents
		};

	}

	function getDracoDataType( draco, attributeType ) {

		switch ( attributeType ) {

			case Float32Array: return draco.DT_FLOAT32;
			case Int8Array: return draco.DT_INT8;
			case Int16Array: return draco.DT_INT16;
			case Int32Array: return draco.DT_INT32;
			case Uint8Array: return draco.DT_UINT8;
			case Uint16Array: return draco.DT_UINT16;
			case Uint32Array: return draco.DT_UINT32;

		}

	}

}

/**
 * @author Deepkolos / https://github.com/deepkolos
 */

class WorkerPool {

	constructor( pool = 4 ) {

		this.pool = pool;
		this.queue = [];
		this.workers = [];
		this.workersResolve = [];
		this.workerStatus = 0;

	}

	_initWorker( workerId ) {

		if ( ! this.workers[ workerId ] ) {

			const worker = this.workerCreator();
			worker.addEventListener( 'message', this._onMessage.bind( this, workerId ) );
			this.workers[ workerId ] = worker;

		}

	}

	_getIdleWorker() {

		for ( let i = 0; i < this.pool; i ++ )
			if ( ! ( this.workerStatus & ( 1 << i ) ) ) return i;

		return - 1;

	}

	_onMessage( workerId, msg ) {

		const resolve = this.workersResolve[ workerId ];
		resolve && resolve( msg );

		if ( this.queue.length ) {

			const { resolve, msg, transfer } = this.queue.shift();
			this.workersResolve[ workerId ] = resolve;
			this.workers[ workerId ].postMessage( msg, transfer );

		} else {

			this.workerStatus ^= 1 << workerId;

		}

	}

	setWorkerCreator( workerCreator ) {

		this.workerCreator = workerCreator;

	}

	setWorkerLimit( pool ) {

		this.pool = pool;

	}

	postMessage( msg, transfer ) {

		return new Promise( ( resolve ) => {

			const workerId = this._getIdleWorker();

			if ( workerId !== - 1 ) {

				this._initWorker( workerId );
				this.workerStatus |= 1 << workerId;
				this.workersResolve[ workerId ] = resolve;
				this.workers[ workerId ].postMessage( msg, transfer );

			} else {

				this.queue.push( { resolve, msg, transfer } );

			}

		} );

	}

	dispose() {

		this.workers.forEach( ( worker ) => worker.terminate() );
		this.workersResolve.length = 0;
		this.workers.length = 0;
		this.queue.length = 0;
		this.workerStatus = 0;

	}

}

/**
 * Loader for KTX 2.0 GPU Texture containers.
 *
 * KTX 2.0 is a container format for various GPU texture formats. The loader
 * supports Basis Universal GPU textures, which can be quickly transcoded to
 * a wide variety of GPU texture compression formats. While KTX 2.0 also allows
 * other hardware-specific formats, this loader does not yet parse them.
 *
 * References:
 * - KTX: http://github.khronos.org/KTX-Specification/
 * - DFD: https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#basicdescriptor
 */

const KTX2TransferSRGB = 2;
const KTX2_ALPHA_PREMULTIPLIED = 1;
const _taskCache = new WeakMap();

let _activeLoaders = 0;

class KTX2Loader extends Loader {

	constructor( manager ) {

		super( manager );

		this.transcoderPath = '';
		this.transcoderBinary = null;
		this.transcoderPending = null;

		this.workerPool = new WorkerPool();
		this.workerSourceURL = '';
		this.workerConfig = null;

		if ( typeof MSC_TRANSCODER !== 'undefined' ) {

			console.warn(

				'THREE.KTX2Loader: Please update to latest "basis_transcoder".'
				+ ' "msc_basis_transcoder" is no longer supported in three.js r125+.'

			);

		}

	}

	setTranscoderPath( path ) {

		this.transcoderPath = path;

		return this;

	}

	setWorkerLimit( num ) {

		this.workerPool.setWorkerLimit( num );

		return this;

	}

	detectSupport( renderer ) {

		this.workerConfig = {
			astcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_astc' ),
			etc1Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc1' ),
			etc2Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc' ),
			dxtSupported: renderer.extensions.has( 'WEBGL_compressed_texture_s3tc' ),
			bptcSupported: renderer.extensions.has( 'EXT_texture_compression_bptc' ),
			pvrtcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_pvrtc' )
				|| renderer.extensions.has( 'WEBKIT_WEBGL_compressed_texture_pvrtc' )
		};


		if ( renderer.capabilities.isWebGL2 ) {

			// https://github.com/mrdoob/three.js/pull/22928
			this.workerConfig.etc1Supported = false;

		}

		return this;

	}

	dispose() {

		this.workerPool.dispose();
		if ( this.workerSourceURL ) URL.revokeObjectURL( this.workerSourceURL );

		return this;

	}

	init() {

		if ( ! this.transcoderPending ) {

			// Load transcoder wrapper.
			const jsLoader = new FileLoader( this.manager );
			jsLoader.setPath( this.transcoderPath );
			jsLoader.setWithCredentials( this.withCredentials );
			const jsContent = jsLoader.loadAsync( 'basis_transcoder.js' );

			// Load transcoder WASM binary.
			const binaryLoader = new FileLoader( this.manager );
			binaryLoader.setPath( this.transcoderPath );
			binaryLoader.setResponseType( 'arraybuffer' );
			binaryLoader.setWithCredentials( this.withCredentials );
			const binaryContent = binaryLoader.loadAsync( 'basis_transcoder.wasm' );

			this.transcoderPending = Promise.all( [ jsContent, binaryContent ] )
				.then( ( [ jsContent, binaryContent ] ) => {

					const fn = KTX2Loader.BasisWorker.toString();

					const body = [
						'/* constants */',
						'let _EngineFormat = ' + JSON.stringify( KTX2Loader.EngineFormat ),
						'let _TranscoderFormat = ' + JSON.stringify( KTX2Loader.TranscoderFormat ),
						'let _BasisFormat = ' + JSON.stringify( KTX2Loader.BasisFormat ),
						'/* basis_transcoder.js */',
						jsContent,
						'/* worker */',
						fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
					].join( '\n' );

					this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
					this.transcoderBinary = binaryContent;

					this.workerPool.setWorkerCreator( () => {

						const worker = new Worker( this.workerSourceURL );
						const transcoderBinary = this.transcoderBinary.slice( 0 );

						worker.postMessage( { type: 'init', config: this.workerConfig, transcoderBinary }, [ transcoderBinary ] );

						return worker;

					} );

				} );

			if ( _activeLoaders > 0 ) {

				// Each instance loads a transcoder and allocates workers, increasing network and memory cost.

				console.warn(

					'THREE.KTX2Loader: Multiple active KTX2 loaders may cause performance issues.'
					+ ' Use a single KTX2Loader instance, or call .dispose() on old instances.'

				);

			}

			_activeLoaders ++;

		}

		return this.transcoderPending;

	}

	load( url, onLoad, onProgress, onError ) {

		if ( this.workerConfig === null ) {

			throw new Error( 'THREE.KTX2Loader: Missing initialization with `.detectSupport( renderer )`.' );

		}

		const loader = new FileLoader( this.manager );

		loader.setResponseType( 'arraybuffer' );
		loader.setWithCredentials( this.withCredentials );

		const texture = new CompressedTexture();

		loader.load( url, ( buffer ) => {

			// Check for an existing task using this buffer. A transferred buffer cannot be transferred
			// again from this thread.
			if ( _taskCache.has( buffer ) ) {

				const cachedTask = _taskCache.get( buffer );

				return cachedTask.promise.then( onLoad ).catch( onError );

			}

			this._createTexture( [ buffer ] )
				.then( function ( _texture ) {

					texture.copy( _texture );
					texture.needsUpdate = true;

					if ( onLoad ) onLoad( texture );

				} )
				.catch( onError );

		}, onProgress, onError );

		return texture;

	}

	_createTextureFrom( transcodeResult ) {

		const { mipmaps, width, height, format, type, error, dfdTransferFn, dfdFlags } = transcodeResult;

		if ( type === 'error' ) return Promise.reject( error );

		const texture = new CompressedTexture( mipmaps, width, height, format, UnsignedByteType );
		texture.minFilter = mipmaps.length === 1 ? LinearFilter : LinearMipmapLinearFilter;
		texture.magFilter = LinearFilter;
		texture.generateMipmaps = false;
		texture.needsUpdate = true;
		texture.encoding = dfdTransferFn === KTX2TransferSRGB ? sRGBEncoding : LinearEncoding;
		texture.premultiplyAlpha = !! ( dfdFlags & KTX2_ALPHA_PREMULTIPLIED );

		return texture;

	}

	/**
	 * @param {ArrayBuffer[]} buffers
	 * @param {object?} config
	 * @return {Promise<CompressedTexture>}
	 */
	_createTexture( buffers, config = {} ) {

		const taskConfig = config;
		const texturePending = this.init().then( () => {

			return this.workerPool.postMessage( { type: 'transcode', buffers, taskConfig: taskConfig }, buffers );

		} ).then( ( e ) => this._createTextureFrom( e.data ) );

		// Cache the task result.
		_taskCache.set( buffers[ 0 ], { promise: texturePending } );

		return texturePending;

	}

	dispose() {

		URL.revokeObjectURL( this.workerSourceURL );
		this.workerPool.dispose();

		_activeLoaders --;

		return this;

	}

}


/* CONSTANTS */

KTX2Loader.BasisFormat = {
	ETC1S: 0,
	UASTC_4x4: 1,
};

KTX2Loader.TranscoderFormat = {
	ETC1: 0,
	ETC2: 1,
	BC1: 2,
	BC3: 3,
	BC4: 4,
	BC5: 5,
	BC7_M6_OPAQUE_ONLY: 6,
	BC7_M5: 7,
	PVRTC1_4_RGB: 8,
	PVRTC1_4_RGBA: 9,
	ASTC_4x4: 10,
	ATC_RGB: 11,
	ATC_RGBA_INTERPOLATED_ALPHA: 12,
	RGBA32: 13,
	RGB565: 14,
	BGR565: 15,
	RGBA4444: 16,
};

KTX2Loader.EngineFormat = {
	RGBAFormat: RGBAFormat,
	RGBA_ASTC_4x4_Format: RGBA_ASTC_4x4_Format,
	RGBA_BPTC_Format: RGBA_BPTC_Format,
	RGBA_ETC2_EAC_Format: RGBA_ETC2_EAC_Format,
	RGBA_PVRTC_4BPPV1_Format: RGBA_PVRTC_4BPPV1_Format,
	RGBA_S3TC_DXT5_Format: RGBA_S3TC_DXT5_Format,
	RGB_ETC1_Format: RGB_ETC1_Format,
	RGB_ETC2_Format: RGB_ETC2_Format,
	RGB_PVRTC_4BPPV1_Format: RGB_PVRTC_4BPPV1_Format,
	RGB_S3TC_DXT1_Format: RGB_S3TC_DXT1_Format,
};


/* WEB WORKER */

KTX2Loader.BasisWorker = function () {

	let config;
	let transcoderPending;
	let BasisModule;

	const EngineFormat = _EngineFormat; // eslint-disable-line no-undef
	const TranscoderFormat = _TranscoderFormat; // eslint-disable-line no-undef
	const BasisFormat = _BasisFormat; // eslint-disable-line no-undef

	self.addEventListener( 'message', function ( e ) {

		const message = e.data;

		switch ( message.type ) {

			case 'init':
				config = message.config;
				init( message.transcoderBinary );
				break;

			case 'transcode':
				transcoderPending.then( () => {

					try {

						const { width, height, hasAlpha, mipmaps, format, dfdTransferFn, dfdFlags } = transcode( message.buffers[ 0 ] );

						const buffers = [];

						for ( let i = 0; i < mipmaps.length; ++ i ) {

							buffers.push( mipmaps[ i ].data.buffer );

						}

						self.postMessage( { type: 'transcode', id: message.id, width, height, hasAlpha, mipmaps, format, dfdTransferFn, dfdFlags }, buffers );

					} catch ( error ) {

						console.error( error );

						self.postMessage( { type: 'error', id: message.id, error: error.message } );

					}

				} );
				break;

		}

	} );

	function init( wasmBinary ) {

		transcoderPending = new Promise( ( resolve ) => {

			BasisModule = { wasmBinary, onRuntimeInitialized: resolve };
			BASIS( BasisModule ); // eslint-disable-line no-undef

		} ).then( () => {

			BasisModule.initializeBasis();

			if ( BasisModule.KTX2File === undefined ) {

				console.warn( 'THREE.KTX2Loader: Please update Basis Universal transcoder.' );

			}

		} );

	}

	function transcode( buffer ) {

		const ktx2File = new BasisModule.KTX2File( new Uint8Array( buffer ) );

		function cleanup() {

			ktx2File.close();
			ktx2File.delete();

		}

		if ( ! ktx2File.isValid() ) {

			cleanup();
			throw new Error( 'THREE.KTX2Loader:	Invalid or unsupported .ktx2 file' );

		}

		const basisFormat = ktx2File.isUASTC() ? BasisFormat.UASTC_4x4 : BasisFormat.ETC1S;
		const width = ktx2File.getWidth();
		const height = ktx2File.getHeight();
		const levels = ktx2File.getLevels();
		const hasAlpha = ktx2File.getHasAlpha();
		const dfdTransferFn = ktx2File.getDFDTransferFunc();
		const dfdFlags = ktx2File.getDFDFlags();

		const { transcoderFormat, engineFormat } = getTranscoderFormat( basisFormat, width, height, hasAlpha );

		if ( ! width || ! height || ! levels ) {

			cleanup();
			throw new Error( 'THREE.KTX2Loader:	Invalid texture' );

		}

		if ( ! ktx2File.startTranscoding() ) {

			cleanup();
			throw new Error( 'THREE.KTX2Loader: .startTranscoding failed' );

		}

		const mipmaps = [];

		for ( let mip = 0; mip < levels; mip ++ ) {

			const levelInfo = ktx2File.getImageLevelInfo( mip, 0, 0 );
			const mipWidth = levelInfo.origWidth;
			const mipHeight = levelInfo.origHeight;
			const dst = new Uint8Array( ktx2File.getImageTranscodedSizeInBytes( mip, 0, 0, transcoderFormat ) );

			const status = ktx2File.transcodeImage(
				dst,
				mip,
				0,
				0,
				transcoderFormat,
				0,
				- 1,
				- 1,
			);

			if ( ! status ) {

				cleanup();
				throw new Error( 'THREE.KTX2Loader: .transcodeImage failed.' );

			}

			mipmaps.push( { data: dst, width: mipWidth, height: mipHeight } );

		}

		cleanup();

		return { width, height, hasAlpha, mipmaps, format: engineFormat, dfdTransferFn, dfdFlags };

	}

	//

	// Optimal choice of a transcoder target format depends on the Basis format (ETC1S or UASTC),
	// device capabilities, and texture dimensions. The list below ranks the formats separately
	// for ETC1S and UASTC.
	//
	// In some cases, transcoding UASTC to RGBA32 might be preferred for higher quality (at
	// significant memory cost) compared to ETC1/2, BC1/3, and PVRTC. The transcoder currently
	// chooses RGBA32 only as a last resort and does not expose that option to the caller.
	const FORMAT_OPTIONS = [
		{
			if: 'astcSupported',
			basisFormat: [ BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.ASTC_4x4, TranscoderFormat.ASTC_4x4 ],
			engineFormat: [ EngineFormat.RGBA_ASTC_4x4_Format, EngineFormat.RGBA_ASTC_4x4_Format ],
			priorityETC1S: Infinity,
			priorityUASTC: 1,
			needsPowerOfTwo: false,
		},
		{
			if: 'bptcSupported',
			basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.BC7_M5, TranscoderFormat.BC7_M5 ],
			engineFormat: [ EngineFormat.RGBA_BPTC_Format, EngineFormat.RGBA_BPTC_Format ],
			priorityETC1S: 3,
			priorityUASTC: 2,
			needsPowerOfTwo: false,
		},
		{
			if: 'dxtSupported',
			basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.BC1, TranscoderFormat.BC3 ],
			engineFormat: [ EngineFormat.RGB_S3TC_DXT1_Format, EngineFormat.RGBA_S3TC_DXT5_Format ],
			priorityETC1S: 4,
			priorityUASTC: 5,
			needsPowerOfTwo: false,
		},
		{
			if: 'etc2Supported',
			basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC2 ],
			engineFormat: [ EngineFormat.RGB_ETC2_Format, EngineFormat.RGBA_ETC2_EAC_Format ],
			priorityETC1S: 1,
			priorityUASTC: 3,
			needsPowerOfTwo: false,
		},
		{
			if: 'etc1Supported',
			basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.ETC1 ],
			engineFormat: [ EngineFormat.RGB_ETC1_Format ],
			priorityETC1S: 2,
			priorityUASTC: 4,
			needsPowerOfTwo: false,
		},
		{
			if: 'pvrtcSupported',
			basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
			transcoderFormat: [ TranscoderFormat.PVRTC1_4_RGB, TranscoderFormat.PVRTC1_4_RGBA ],
			engineFormat: [ EngineFormat.RGB_PVRTC_4BPPV1_Format, EngineFormat.RGBA_PVRTC_4BPPV1_Format ],
			priorityETC1S: 5,
			priorityUASTC: 6,
			needsPowerOfTwo: true,
		},
	];

	const ETC1S_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {

		return a.priorityETC1S - b.priorityETC1S;

	} );
	const UASTC_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {

		return a.priorityUASTC - b.priorityUASTC;

	} );

	function getTranscoderFormat( basisFormat, width, height, hasAlpha ) {

		let transcoderFormat;
		let engineFormat;

		const options = basisFormat === BasisFormat.ETC1S ? ETC1S_OPTIONS : UASTC_OPTIONS;

		for ( let i = 0; i < options.length; i ++ ) {

			const opt = options[ i ];

			if ( ! config[ opt.if ] ) continue;
			if ( ! opt.basisFormat.includes( basisFormat ) ) continue;
			if ( hasAlpha && opt.transcoderFormat.length < 2 ) continue;
			if ( opt.needsPowerOfTwo && ! ( isPowerOfTwo( width ) && isPowerOfTwo( height ) ) ) continue;

			transcoderFormat = opt.transcoderFormat[ hasAlpha ? 1 : 0 ];
			engineFormat = opt.engineFormat[ hasAlpha ? 1 : 0 ];

			return { transcoderFormat, engineFormat };

		}

		console.warn( 'THREE.KTX2Loader: No suitable compressed texture format found. Decoding to RGBA32.' );

		transcoderFormat = TranscoderFormat.RGBA32;
		engineFormat = EngineFormat.RGBAFormat;

		return { transcoderFormat, engineFormat };

	}

	function isPowerOfTwo( value ) {

		if ( value <= 2 ) return true;

		return ( value & ( value - 1 ) ) === 0 && value !== 0;

	}

};

const Gradients = {
    // From chroma spectral http://gka.github.io/chroma.js/
    SPECTRAL: [
        [0, new Color(0.3686, 0.3098, 0.6353)],
        [0.1, new Color(0.1961, 0.5333, 0.7412)],
        [0.2, new Color(0.4, 0.7608, 0.6471)],
        [0.3, new Color(0.6706, 0.8667, 0.6431)],
        [0.4, new Color(0.902, 0.9608, 0.5961)],
        [0.5, new Color(1.0, 1.0, 0.749)],
        [0.6, new Color(0.9961, 0.8784, 0.5451)],
        [0.7, new Color(0.9922, 0.6824, 0.3804)],
        [0.8, new Color(0.9569, 0.4275, 0.2627)],
        [0.9, new Color(0.8353, 0.2431, 0.3098)],
        [1, new Color(0.6196, 0.0039, 0.2588)],
    ],
    PLASMA: [
        [0.0, new Color(0.241, 0.015, 0.61)],
        [0.1, new Color(0.387, 0.001, 0.654)],
        [0.2, new Color(0.524, 0.025, 0.653)],
        [0.3, new Color(0.651, 0.125, 0.596)],
        [0.4, new Color(0.752, 0.227, 0.513)],
        [0.5, new Color(0.837, 0.329, 0.431)],
        [0.6, new Color(0.907, 0.435, 0.353)],
        [0.7, new Color(0.963, 0.554, 0.272)],
        [0.8, new Color(0.992, 0.681, 0.195)],
        [0.9, new Color(0.987, 0.822, 0.144)],
        [1.0, new Color(0.94, 0.975, 0.131)],
    ],
    YELLOW_GREEN: [
        [0, new Color(0.1647, 0.2824, 0.3451)],
        [0.1, new Color(0.1338, 0.3555, 0.4227)],
        [0.2, new Color(0.061, 0.4319, 0.4864)],
        [0.3, new Color(0.0, 0.5099, 0.5319)],
        [0.4, new Color(0.0, 0.5881, 0.5569)],
        [0.5, new Color(0.137, 0.665, 0.5614)],
        [0.6, new Color(0.2906, 0.7395, 0.5477)],
        [0.7, new Color(0.4453, 0.8099, 0.5201)],
        [0.8, new Color(0.6102, 0.8748, 0.485)],
        [0.9, new Color(0.7883, 0.9323, 0.4514)],
        [1, new Color(0.9804, 0.9804, 0.4314)],
    ],
    VIRIDIS: [
        [0.0, new Color(0.267, 0.005, 0.329)],
        [0.1, new Color(0.283, 0.141, 0.458)],
        [0.2, new Color(0.254, 0.265, 0.53)],
        [0.3, new Color(0.207, 0.372, 0.553)],
        [0.4, new Color(0.164, 0.471, 0.558)],
        [0.5, new Color(0.128, 0.567, 0.551)],
        [0.6, new Color(0.135, 0.659, 0.518)],
        [0.7, new Color(0.267, 0.749, 0.441)],
        [0.8, new Color(0.478, 0.821, 0.318)],
        [0.9, new Color(0.741, 0.873, 0.15)],
        [1.0, new Color(0.993, 0.906, 0.144)],
    ],
    INFERNO: [
        [0.0, new Color(0.077, 0.042, 0.206)],
        [0.1, new Color(0.225, 0.036, 0.388)],
        [0.2, new Color(0.373, 0.074, 0.432)],
        [0.3, new Color(0.522, 0.128, 0.42)],
        [0.4, new Color(0.665, 0.182, 0.37)],
        [0.5, new Color(0.797, 0.255, 0.287)],
        [0.6, new Color(0.902, 0.364, 0.184)],
        [0.7, new Color(0.969, 0.516, 0.063)],
        [0.8, new Color(0.988, 0.683, 0.072)],
        [0.9, new Color(0.961, 0.859, 0.298)],
        [1.0, new Color(0.988, 0.998, 0.645)],
    ],
    GRAYSCALE: [
        [0, new Color(0, 0, 0)],
        [1, new Color(1, 1, 1)],
    ],
    // 16 samples of the TURBU color scheme
    // values taken from: https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f
    // original file licensed under Apache-2.0
    TURBO: [
        [0.0, new Color(0.18995, 0.07176, 0.23217)],
        [0.07, new Color(0.25107, 0.25237, 0.63374)],
        [0.13, new Color(0.27628, 0.42118, 0.89123)],
        [0.2, new Color(0.25862, 0.57958, 0.99876)],
        [0.27, new Color(0.15844, 0.73551, 0.92305)],
        [0.33, new Color(0.09267, 0.86554, 0.7623)],
        [0.4, new Color(0.19659, 0.94901, 0.59466)],
        [0.47, new Color(0.42778, 0.99419, 0.38575)],
        [0.53, new Color(0.64362, 0.98999, 0.23356)],
        [0.6, new Color(0.80473, 0.92452, 0.20459)],
        [0.67, new Color(0.93301, 0.81236, 0.22667)],
        [0.73, new Color(0.99314, 0.67408, 0.20348)],
        [0.8, new Color(0.9836, 0.49291, 0.12849)],
        [0.87, new Color(0.92105, 0.31489, 0.05475)],
        [0.93, new Color(0.81608, 0.18462, 0.01809)],
        [1.0, new Color(0.66449, 0.08436, 0.00424)],
    ],
    RAINBOW: [
        [0, new Color(0.278, 0, 0.714)],
        [1 / 6, new Color(0, 0, 1)],
        [2 / 6, new Color(0, 1, 1)],
        [3 / 6, new Color(0, 1, 0)],
        [4 / 6, new Color(1, 1, 0)],
        [5 / 6, new Color(1, 0.64, 0)],
        [1, new Color(1, 0, 0)],
    ],
    CONTOUR: [
        [0.0, new Color(0, 0, 0)],
        [0.03, new Color(0, 0, 0)],
        [0.04, new Color(1, 1, 1)],
        [1.0, new Color(1, 1, 1)],
    ],
};

const PointCloudFS = `
  varying vec3 vColor;
  uniform float alpha;

  void main() {
    if (vColor == vec3(0.0, 0.0, 0.0)) {
      discard;
    } else {
      gl_FragColor = vec4( vColor, alpha);
    }
  }
`;
const PointCloudVS = `
  varying vec3 vColor;
  uniform sampler2D gradient;
  uniform sampler2D grayscale;
  attribute float intensity;
  attribute float classification;
  uniform vec3 rootCenter;
  uniform vec3 rootNormal;
  uniform vec2 elevationRange;
  uniform int coloring;
  uniform bool hideGround;
  uniform float maxIntensity;
  uniform float intensityContrast;
  uniform float pointSize;

  #ifdef USE_COLOR
  vec3 getRGB() {
      vec3 rgb = color;
      return rgb;
  }
  #endif

  vec3 getElevation(){
    vec4 world = modelMatrix * vec4( position, 1.0 );
    float diff = abs(dot(rootNormal, (vec3(world) - rootCenter)));
    float w = max(diff - elevationRange.x,0.0) / max(elevationRange.y - elevationRange.x,1.0);
    vec3 cElevation = texture2D(gradient, vec2(w,1.0-w)).rgb;

    return cElevation;
  }

  vec3 getIntensity(){
    // TODO: real contrast enhancement. Check https://github.com/yuki-koyama/enhancer/blob/master/shaders/enhancer.fs
    float intmod = pow(intensity, intensityContrast);
    vec3 cIntensity = texture2D(grayscale, vec2(intmod / maxIntensity ,1.0-(intmod / maxIntensity))).rgb;
    return cIntensity;
  }

  vec3 getClassification(){
    float classNormalized = classification / 255.0;
    vec3 cClassification = texture2D(gradient, vec2(classNormalized * 5.0,1.0-classNormalized * 5.0)).rgb;
    return cClassification;
  }

  vec3 getColor(){
      vec3 color;
      if (hideGround && classification == 2.0) {
         return vec3(0.0, 0.0, 0.0);               
      }

      if (coloring == 1) {
        color = getIntensity();
      }
      else if (coloring == 2) {
        color = getClassification();
      } else if (coloring == 3) {
        color = getElevation();
      } 
      #ifdef USE_COLOR
      else if (coloring == 4) {
        color = getRGB();
      }
      #endif
      else {
        color = vec3(1.0, 1.0, 1.0);
      }
      return color;
  }

  void main() {
      vColor = getColor();

      gl_PointSize = pointSize;
      gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
  }
`;

/** Types of coloring used when viewing point cloud tiles */
var PointCloudColoring;
(function (PointCloudColoring) {
    PointCloudColoring[PointCloudColoring["Intensity"] = 1] = "Intensity";
    PointCloudColoring[PointCloudColoring["Classification"] = 2] = "Classification";
    PointCloudColoring[PointCloudColoring["Elevation"] = 3] = "Elevation";
    PointCloudColoring[PointCloudColoring["RGB"] = 4] = "RGB";
    PointCloudColoring[PointCloudColoring["White"] = 5] = "White";
})(PointCloudColoring || (PointCloudColoring = {}));
/** Types of shading used when viewing b3dm (mesh) tiles */
var Shading;
(function (Shading) {
    Shading[Shading["FlatTexture"] = 1] = "FlatTexture";
    Shading[Shading["ShadedTexture"] = 2] = "ShadedTexture";
    Shading[Shading["ShadedNoTexture"] = 3] = "ShadedNoTexture";
})(Shading || (Shading = {}));
var GeoTransform;
(function (GeoTransform) {
    GeoTransform[GeoTransform["Reset"] = 1] = "Reset";
    GeoTransform[GeoTransform["Mercator"] = 2] = "Mercator";
    GeoTransform[GeoTransform["WGS84Cartesian"] = 3] = "WGS84Cartesian";
})(GeoTransform || (GeoTransform = {}));

const gradient = Gradients.RAINBOW;
const gradientTexture = typeof document != 'undefined' ? generateGradientTexture(gradient) : null;
const grayscale = Gradients.GRAYSCALE;
const grayscaleTexture = typeof document != 'undefined' ? generateGradientTexture(grayscale) : null;
const defaultOptions = {
    throttleRequests: true,
    maxRequests: 64,
    updateInterval: 0.1,
    maxConcurrency: 1,
    maximumScreenSpaceError: 16,
    maximumMemoryUsage: 32,
    viewDistanceScale: 1.0,
    skipLevelOfDetail: false,
    updateTransforms: true,
    shading: Shading.FlatTexture,
    transparent: false,
    pointCloudColoring: PointCloudColoring.White,
    pointSize: 1.0,
    worker: true,
    wireframe: false,
    debug: false,
    basisTranscoderPath: null,
    dracoDecoderPath: null,
    material: null,
    computeNormals: false,
    shaderCallback: null,
    geoTransform: GeoTransform.Reset,
    preloadTilesCount: null
};
/** 3D Tiles Loader */
class Loader3DTiles {
    /**
    * Loads a tileset of 3D Tiles according to the given {@link LoaderProps}
    * @public
    *
    * @param props - Properties for this load call {@link LoaderProps}.
    * @returns An object containing the 3D Model to be added to the scene
    * and a runtime engine to be updated every frame.
    */
    static load(props) {
        return __awaiter(this, void 0, void 0, function* () {
            const options = Object.assign(Object.assign({}, defaultOptions), props.options);
            const { url } = props;
            const UPDATE_INTERVAL = options.updateInterval;
            const MAX_DEPTH_FOR_ORIENTATION = 5;
            const loadersGLOptions = {};
            if (options.cesiumIONToken) {
                loadersGLOptions['cesium-ion'] = {
                    accessToken: options.cesiumIONToken,
                };
                const metadata = yield CesiumIonLoader.preload(url, loadersGLOptions);
                loadersGLOptions['fetch'] = { headers: metadata.headers };
            }
            if (props.loadingManager) {
                props.loadingManager.itemStart(url);
            }
            const tilesetJson = yield load(url, Tiles3DLoader, Object.assign({}, loadersGLOptions));
            const renderMap = {};
            const boxMap = {};
            const unloadQueue = [];
            const root = new Group();
            const tileBoxes = new Group();
            if (!options.debug) {
                tileBoxes.visible = false;
            }
            const pointcloudUniforms = {
                pointSize: { type: 'f', value: options.pointSize },
                gradient: { type: 't', value: gradientTexture },
                grayscale: { type: 't', value: grayscaleTexture },
                rootCenter: { type: 'vec3', value: new Vector3$1() },
                rootNormal: { type: 'vec3', value: new Vector3$1() },
                coloring: { type: 'i', value: options.pointCloudColoring },
                hideGround: { type: 'b', value: true },
                elevationRange: { type: 'vec2', value: new Vector2$1(0, 400) },
                maxIntensity: { type: 'f', value: 1.0 },
                intensityContrast: { type: 'f', value: 1.0 },
                alpha: { type: 'f', value: 1.0 },
            };
            const pointcloudMaterial = new ShaderMaterial({
                uniforms: pointcloudUniforms,
                vertexShader: PointCloudVS,
                fragmentShader: PointCloudFS,
                transparent: options.transparent,
                vertexColors: true
            });
            let cameraReference = null;
            let rendererReference = null;
            const gltfLoader = new GLTFLoader();
            let ktx2Loader = undefined;
            let dracoLoader = undefined;
            if (options.basisTranscoderPath) {
                ktx2Loader = new KTX2Loader();
                ktx2Loader.detectSupport(props.renderer);
                ktx2Loader.setTranscoderPath(options.basisTranscoderPath + '/');
                ktx2Loader.setWorkerLimit(1);
                gltfLoader.setKTX2Loader(ktx2Loader);
            }
            if (options.dracoDecoderPath) {
                dracoLoader = new DRACOLoader();
                dracoLoader.setDecoderPath(options.dracoDecoderPath + '/');
                dracoLoader.setWorkerLimit(options.maxConcurrency);
                gltfLoader.setDRACOLoader(dracoLoader);
            }
            const unlitMaterial = new MeshBasicMaterial({ transparent: options.transparent });
            const tileOptions = {
                maximumMemoryUsage: options.maximumMemoryUsage,
                maximumScreenSpaceError: options.maximumScreenSpaceError,
                viewDistanceScale: options.viewDistanceScale,
                skipLevelOfDetail: options.skipLevelOfDetail,
                updateTransforms: options.updateTransforms,
                throttleRequests: options.throttleRequests,
                maxRequests: options.maxRequests,
                contentLoader: (tile) => __awaiter(this, void 0, void 0, function* () {
                    let tileContent = null;
                    switch (tile.type) {
                        case TILE_TYPE.POINTCLOUD: {
                            tileContent = createPointNodes(tile, pointcloudMaterial, options, rootTransformInverse);
                            break;
                        }
                        case TILE_TYPE.SCENEGRAPH:
                        case TILE_TYPE.MESH: {
                            tileContent = yield createGLTFNodes(gltfLoader, tile, unlitMaterial, options, rootTransformInverse);
                            break;
                        }
                    }
                    if (tileContent) {
                        tileContent.visible = false;
                        renderMap[tile.id] = tileContent;
                        root.add(renderMap[tile.id]);
                        if (options.debug) {
                            const box = loadersBoundingBoxToMesh(tile);
                            tileBoxes.add(box);
                            boxMap[tile.id] = box;
                        }
                    }
                }),
                onTileLoad: (tile) => __awaiter(this, void 0, void 0, function* () {
                    if (tileset) {
                        if (!orientationDetected && (tile === null || tile === void 0 ? void 0 : tile.depth) <= MAX_DEPTH_FOR_ORIENTATION) {
                            detectOrientation(tile);
                        }
                        tileset._frameNumber++;
                        tilesetUpdate(tileset, renderMap, rendererReference, cameraReference);
                    }
                }),
                onTileUnload: (tile) => {
                    unloadQueue.push(tile);
                },
                onTileError: (tile, message) => {
                    console.error('Tile error', tile.id, message);
                },
            };
            const tileset = new Tileset3D(tilesetJson, Object.assign(Object.assign({}, tileOptions), { loadOptions: Object.assign(Object.assign({}, loadersGLOptions), { maxConcurrency: options.maxConcurrency, worker: options.worker, gltf: {
                        loadImages: false,
                    }, '3d-tiles': {
                        loadGLTF: false
                    } }) }));
            //
            // transformations
            const threeMat = new Matrix4$1();
            const tileTrasnform = new Matrix4$1();
            const rootCenter = new Vector3$1();
            let orientationDetected = false;
            if (tileset.root.boundingVolume) {
                if (tileset.root.header.boundingVolume.region) {
                    // TODO: Handle region type bounding volumes
                    // https://github.com/visgl/loaders.gl/issues/1994
                    console.warn("Cannot apply a model matrix to bounding volumes of type region. Tileset stays in original geo-coordinates.");
                    options.geoTransform = GeoTransform.WGS84Cartesian;
                }
                tileTrasnform.setPosition(tileset.root.boundingVolume.center[0], tileset.root.boundingVolume.center[1], tileset.root.boundingVolume.center[2]);
            }
            else {
                console.warn("Bounding volume not found, no transformations applied");
            }
            if (options.debug) {
                const box = loadersBoundingBoxToMesh(tileset.root);
                tileBoxes.add(box);
                boxMap[tileset.root.id] = box;
            }
            let disposeFlag = false;
            let loadingEnded = false;
            pointcloudUniforms.rootCenter.value.copy(rootCenter);
            pointcloudUniforms.rootNormal.value.copy(new Vector3$1(0, 0, 1).normalize());
            // Extra stats
            tileset.stats.get('Loader concurrency').count = options.maxConcurrency;
            tileset.stats.get('Maximum SSE').count = options.maximumScreenSpaceError;
            tileset.stats.get('Maximum mem usage').count = options.maximumMemoryUsage;
            let timer = 0;
            let lastCameraTransform = null;
            let lastCameraAspect = null;
            const lastCameraPosition = new Vector3$1(Infinity, Infinity, Infinity);
            let sseDenominator = null;
            root.updateMatrixWorld(true);
            const lastRootTransform = new Matrix4$1().copy(root.matrixWorld);
            const rootTransformInverse = new Matrix4$1().copy(lastRootTransform).invert();
            detectOrientation(tileset.root);
            updateResetTransform();
            if (options.debug) {
                boxMap[tileset.root.id].applyMatrix4(threeMat);
                tileBoxes.matrixWorld.copy(root.matrixWorld);
            }
            if (options.geoTransform == GeoTransform.Mercator) {
                const coords = datumsToSpherical(tileset.cartographicCenter[1], tileset.cartographicCenter[0]);
                rootCenter.set(coords.x, 0, -coords.y);
                root.position.copy(rootCenter);
                root.rotation.set(-Math.PI / 2, 0, 0);
                root.updateMatrixWorld(true);
            }
            else if (options.geoTransform == GeoTransform.WGS84Cartesian) {
                root.applyMatrix4(tileTrasnform);
                root.updateMatrixWorld(true);
                rootCenter.copy(root.position);
            }
            function detectOrientation(tile) {
                if (!tile.boundingVolume.halfAxes) {
                    return;
                }
                const halfAxes = tile.boundingVolume.halfAxes;
                const orientationMatrix = new Matrix4$1()
                    .extractRotation(getMatrix4FromHalfAxes(halfAxes))
                    .premultiply(new Matrix4$1().extractRotation(rootTransformInverse));
                const rotation = new Euler().setFromRotationMatrix(orientationMatrix);
                if (!rotation.equals(new Euler())) {
                    orientationDetected = true;
                    const pos = new Vector3$1(tileTrasnform.elements[12], tileTrasnform.elements[13], tileTrasnform.elements[14]);
                    tileTrasnform.extractRotation(orientationMatrix);
                    tileTrasnform.setPosition(pos);
                    updateResetTransform();
                }
            }
            function updateResetTransform() {
                if (options.geoTransform != GeoTransform.WGS84Cartesian) {
                    // Reset the current model matrix and apply our own transformation
                    threeMat.copy(tileTrasnform).invert();
                    threeMat.premultiply(lastRootTransform);
                    threeMat.copy(lastRootTransform).multiply(new Matrix4$1().copy(tileTrasnform).invert());
                    tileset.modelMatrix = new Matrix4(threeMat.toArray());
                }
            }
            function tilesetUpdate(tileset, renderMap, renderer, camera) {
                if (disposeFlag) {
                    return;
                }
                // Assumes camera fov, near and far are not changing
                if (!sseDenominator || camera.aspect != lastCameraAspect) {
                    const loadersFrustum = new PerspectiveFrustum({
                        fov: (camera.fov / 180) * Math.PI,
                        aspectRatio: camera.aspect,
                        near: camera.near,
                        far: camera.far,
                    });
                    sseDenominator = loadersFrustum.sseDenominator;
                    lastCameraAspect = camera.aspect;
                    if (options.debug) {
                        console.log('Updated sse denonimator:', sseDenominator);
                    }
                }
                const frustum = getCameraFrustum(camera);
                const planes = frustum.planes.map((plane) => new Plane(plane.normal.toArray(), plane.constant));
                const cullingVolume = new CullingVolume(planes);
                const rendererSize = new Vector2$1();
                renderer.getSize(rendererSize);
                const frameState = {
                    camera: {
                        position: lastCameraPosition.toArray(),
                    },
                    height: rendererSize.y,
                    frameNumber: tileset._frameNumber,
                    sseDenominator: sseDenominator,
                    cullingVolume: cullingVolume,
                    viewport: {
                        id: 0,
                    },
                };
                tileset._cache.reset();
                tileset._traverser.traverse(tileset.root, frameState, tileset.options);
                for (const tile of tileset.tiles) {
                    if (tile.selected) {
                        if (!renderMap[tile.id]) {
                            console.error('TILE SELECTED BUT NOT LOADED!!', tile.id);
                        }
                        else {
                            // Make sure it's visible
                            renderMap[tile.id].visible = true;
                        }
                    }
                    else {
                        if (renderMap[tile.id]) {
                            renderMap[tile.id].visible = false;
                        }
                    }
                }
                while (unloadQueue.length > 0) {
                    const tile = unloadQueue.pop();
                    if (renderMap[tile.id] && tile.contentState == TILE_CONTENT_STATE.UNLOADED) {
                        root.remove(renderMap[tile.id]);
                        disposeNode(renderMap[tile.id]);
                        delete renderMap[tile.id];
                    }
                    if (boxMap[tile.id]) {
                        disposeNode(boxMap[tile.id]);
                        tileBoxes.remove(boxMap[tile.id]);
                        delete boxMap[tile.id];
                    }
                }
                const tilesLoaded = tileset.stats.get('Tiles Loaded').count;
                const tilesLoading = tileset.stats.get('Tiles Loading').count;
                if (props.onProgress) {
                    props.onProgress(tilesLoaded, tilesLoaded + tilesLoading);
                }
                if (props.loadingManager && !loadingEnded) {
                    if (tilesLoading == 0 &&
                        (options.preloadTilesCount == null ||
                            tilesLoaded >= options.preloadTilesCount)) {
                        loadingEnded = true;
                        props.loadingManager.itemEnd(props.url);
                    }
                }
                return frameState;
            }
            return {
                model: root,
                runtime: {
                    getTileset: () => {
                        return tileset;
                    },
                    getStats: () => {
                        return tileset.stats;
                    },
                    showTiles: (visible) => {
                        tileBoxes.visible = visible;
                    },
                    setWireframe: (wireframe) => {
                        options.wireframe = wireframe;
                        root.traverse((object) => {
                            if (object instanceof Mesh) {
                                object.material.wireframe = wireframe;
                            }
                        });
                    },
                    setDebug: (debug) => {
                        options.debug = debug;
                        tileBoxes.visible = debug;
                    },
                    setShading: (shading) => {
                        options.shading = shading;
                    },
                    getTileBoxes: () => {
                        return tileBoxes;
                    },
                    setViewDistanceScale: (scale) => {
                        tileset.options.viewDistanceScale = scale;
                        tileset._frameNumber++;
                        tilesetUpdate(tileset, renderMap, rendererReference, cameraReference);
                    },
                    setHideGround: (enabled) => {
                        pointcloudUniforms.hideGround.value = enabled;
                    },
                    setPointCloudColoring: (selection) => {
                        pointcloudUniforms.coloring.value = selection;
                    },
                    setElevationRange: (range) => {
                        pointcloudUniforms.elevationRange.value.set(range[0], range[1]);
                    },
                    setMaxIntensity: (intensity) => {
                        pointcloudUniforms.maxIntensity.value = intensity;
                    },
                    setIntensityContrast: (contrast) => {
                        pointcloudUniforms.intensityContrast.value = contrast;
                    },
                    setPointAlpha: (alpha) => {
                        pointcloudUniforms.alpha.value = alpha;
                    },
                    getLatLongHeightFromPosition: (position) => {
                        const cartographicPosition = tileset.ellipsoid.cartesianToCartographic(new Vector3$1().copy(position).applyMatrix4(new Matrix4$1().copy(threeMat).invert()).toArray());
                        return {
                            lat: cartographicPosition[1],
                            long: cartographicPosition[0],
                            height: cartographicPosition[2],
                        };
                    },
                    getPositionFromLatLongHeight: (coord) => {
                        const cartesianPosition = tileset.ellipsoid.cartographicToCartesian([coord.long, coord.lat, coord.height]);
                        return new Vector3$1(...cartesianPosition).applyMatrix4(threeMat);
                    },
                    getCameraFrustum: (camera) => {
                        const frustum = getCameraFrustum(camera);
                        const meshes = frustum.planes
                            .map((plane) => new Plane(plane.normal.toArray(), plane.constant))
                            .map((loadersPlane) => loadersPlaneToMesh(loadersPlane));
                        const model = new Group();
                        for (const mesh of meshes)
                            model.add(mesh);
                        return model;
                    },
                    update: function (dt, renderer, camera) {
                        cameraReference = camera;
                        rendererReference = renderer;
                        timer += dt;
                        if (tileset && timer >= UPDATE_INTERVAL) {
                            if (!lastRootTransform.equals(root.matrixWorld)) {
                                timer = 0;
                                lastRootTransform.copy(root.matrixWorld);
                                updateResetTransform();
                                const rootCenter = new Vector3$1().setFromMatrixPosition(lastRootTransform);
                                pointcloudUniforms.rootCenter.value.copy(rootCenter);
                                pointcloudUniforms.rootNormal.value.copy(new Vector3$1(0, 0, 1).applyMatrix4(lastRootTransform).normalize());
                                rootTransformInverse.copy(lastRootTransform).invert();
                                if (options.debug) {
                                    boxMap[tileset.root.id].matrixWorld.copy(threeMat);
                                    boxMap[tileset.root.id].applyMatrix4(lastRootTransform);
                                }
                            }
                            if (lastCameraTransform == null) {
                                lastCameraTransform = new Matrix4$1().copy(camera.matrixWorld);
                            }
                            else {
                                const cameraChanged = !camera.matrixWorld.equals(lastCameraTransform) ||
                                    !(camera.aspect == lastCameraAspect);
                                if (cameraChanged) {
                                    timer = 0;
                                    tileset._frameNumber++;
                                    camera.getWorldPosition(lastCameraPosition);
                                    lastCameraTransform.copy(camera.matrixWorld);
                                    tilesetUpdate(tileset, renderMap, renderer, camera);
                                }
                            }
                        }
                    },
                    dispose: function () {
                        disposeFlag = true;
                        tileset._destroy();
                        while (root.children.length > 0) {
                            const obj = root.children[0];
                            disposeNode(obj);
                            root.remove(obj);
                        }
                        while (tileBoxes.children.length > 0) {
                            const obj = tileBoxes.children[0];
                            tileBoxes.remove(obj);
                            obj.geometry.dispose();
                            obj.material.dispose();
                        }
                        if (ktx2Loader) {
                            ktx2Loader.dispose();
                        }
                        if (dracoLoader) {
                            dracoLoader.dispose();
                        }
                    },
                },
            };
        });
    }
}
function createGLTFNodes(gltfLoader, tile, unlitMaterial, options, rootTransformInverse) {
    return __awaiter(this, void 0, void 0, function* () {
        return new Promise((resolve, reject) => {
            var _a;
            const rotateX = new Matrix4$1().makeRotationAxis(new Vector3$1(1, 0, 0), Math.PI / 2);
            const shouldRotate = ((_a = tile.tileset.asset) === null || _a === void 0 ? void 0 : _a.gltfUpAxis) !== "Z";
            // The computed trasnform already contains the root's transform, so we have to invert it
            const contentTransform = new Matrix4$1().fromArray(tile.computedTransform).premultiply(rootTransformInverse);
            if (shouldRotate) {
                contentTransform.multiply(rotateX); // convert from GLTF Y-up to Z-up
            }
            gltfLoader.parse(tile.content.gltfArrayBuffer, tile.contentUrl ? tile.contentUrl.substr(0, tile.contentUrl.lastIndexOf('/') + 1) : '', (gltf) => {
                const tileContent = gltf.scenes[0];
                tileContent.applyMatrix4(contentTransform);
                tileContent.traverse((object) => {
                    if (object.type == "Mesh") {
                        const mesh = object;
                        const originalMaterial = mesh.material;
                        const originalMap = originalMaterial.map;
                        if (options.material) {
                            mesh.material = options.material.clone();
                            originalMaterial.dispose();
                        }
                        else if (options.shading == Shading.FlatTexture) {
                            mesh.material = unlitMaterial.clone();
                            originalMaterial.dispose();
                        }
                        if (options.shading != Shading.ShadedNoTexture) {
                            if (mesh.material.type == "ShaderMaterial") {
                                mesh.material.uniforms.map = { value: originalMap };
                            }
                            else {
                                mesh.material.map = originalMap;
                            }
                        }
                        else {
                            if (originalMap) {
                                originalMap.dispose();
                            }
                            mesh.material.map = null;
                        }
                        if (options.shaderCallback) {
                            mesh.onBeforeRender = options.shaderCallback;
                        }
                        mesh.material.wireframe = options.wireframe;
                        if (options.computeNormals) {
                            mesh.geometry.computeVertexNormals();
                        }
                    }
                });
                resolve(tileContent);
            }, (e) => {
                reject(new Error(`error parsing gltf in tile ${tile.id}: ${e}`));
            });
        });
    });
}
function createPointNodes(tile, pointcloudMaterial, options, rootTransformInverse) {
    const d = {
        rtc_center: tile.content.rtcCenter,
        points: tile.content.attributes.positions,
        intensities: tile.content.attributes.intensity,
        classifications: tile.content.attributes.classification,
        rgb: null,
        rgba: null,
    };
    const { colors } = tile.content.attributes;
    if (colors && colors.size === 3) {
        d.rgb = colors.value;
    }
    if (colors && colors.size === 4) {
        d.rgba = colors.value;
    }
    const geometry = new BufferGeometry();
    geometry.setAttribute('position', new Float32BufferAttribute(d.points, 3));
    const contentTransform = new Matrix4$1().fromArray(tile.computedTransform).premultiply(rootTransformInverse);
    if (d.rgba) {
        geometry.setAttribute('color', new Float32BufferAttribute(d.rgba, 4));
    }
    else if (d.rgb) {
        geometry.setAttribute('color', new Uint8BufferAttribute(d.rgb, 3, true));
    }
    if (d.intensities) {
        geometry.setAttribute('intensity', 
        // Handles both 16bit or 8bit intensity values
        new BufferAttribute(d.intensities, 1, true));
    }
    if (d.classifications) {
        geometry.setAttribute('classification', new Uint8BufferAttribute(d.classifications, 1, false));
    }
    const tileContent = new Points(geometry, options.material || pointcloudMaterial);
    if (d.rtc_center) {
        const c = d.rtc_center;
        contentTransform.multiply(new Matrix4$1().makeTranslation(c[0], c[1], c[2]));
    }
    tileContent.applyMatrix4(contentTransform);
    return tileContent;
}
function disposeMaterial(material) {
    var _a, _b, _c, _d;
    if ((_a = material === null || material === void 0 ? void 0 : material.uniforms) === null || _a === void 0 ? void 0 : _a.map) {
        (_c = (_b = material === null || material === void 0 ? void 0 : material.uniforms) === null || _b === void 0 ? void 0 : _b.map.value) === null || _c === void 0 ? void 0 : _c.dispose();
    }
    else if (material.map) {
        (_d = material.map) === null || _d === void 0 ? void 0 : _d.dispose();
    }
    material.dispose();
}
function disposeNode(node) {
    node.traverse((object) => {
        if (object.isMesh) {
            object.geometry.dispose();
            if (object.material.isMaterial) {
                disposeMaterial(object.material);
            }
            else {
                // an array of materials
                for (const material of object.material) {
                    disposeMaterial(material);
                }
            }
        }
    });
    for (let i = node.children.length - 1; i >= 0; i--) {
        const obj = node.children[i];
        node.remove(obj);
    }
}
//------------------------------------------------------test
const queryParams = new URLSearchParams(document.location.search);
const canvasParent = document.querySelector('#canvas-parent');
const statsParent = document.querySelector('#stats-widget');
const scene = new Scene();
const camera = new PerspectiveCamera(35, 1, 0.01, 1000);
const renderer = new WebGLRenderer();
renderer.outputEncoding = sRGBEncoding;
const clock = new Clock();
const rig = new v(camera, scene);
let controls = undefined;
if (queryParams.get('orbit')) {
    controls = new OrbitControls(camera, canvasParent);
    controls.listenToKeyEvents(document.body);
    camera.position.set(0, 200, 0);
    controls.update();
}
else {
    controls = new k(rig, {
        panDegreeFactor: 2,
        wheelScaleFactor: 0.01,
        keyboardScaleFactor: 0.015,
        keyboardDampFactor: 0
    });
    controls.enable();
}
canvasParent.appendChild(renderer.domElement);
const threeJsStats = new Stats$2();
threeJsStats.domElement.style.position = 'absolute';
threeJsStats.domElement.style.top = '10px';
threeJsStats.domElement.style.left = '10px';
canvasParent.appendChild(threeJsStats.domElement);
let tilesRuntime = undefined;
let statsRuntime = undefined;
if (queryParams.get('tilesetUrl')) {
    document.querySelector('#example-desc').style.display = 'none';
}
loadTileset();
function loadTileset() {
    var _a;
    return __awaiter(this, void 0, void 0, function* () {
        const result = yield Loader3DTiles.load({
            url: (_a = queryParams.get('tilesetUrl')) !== null && _a !== void 0 ? _a : 
            //'https://int.nyt.com/data/3dscenes/ONA360/TILESET/0731_FREEMAN_ALLEY_10M_A_36x8K__10K-PN_50P_DB/tileset_tileset.json',
            'https://testgis.4dage.com/LVBADUI_qp/tileset.json',
            renderer: renderer,
            options: {
                dracoDecoderPath: 'https://cdn.jsdelivr.net/npm/three@0.137.0/examples/js/libs/draco',
                basisTranscoderPath: 'https://cdn.jsdelivr.net/npm/three@0.137.0/examples/js/libs/basis',
                maximumScreenSpaceError: 48 //queryParams.get('sse') ?? 48,
            }
        });
        const { model, runtime } = result;
        model.rotation.set(-Math.PI / 2, 0, Math.PI / 2);
        if (!queryParams.get('tilesetUrl')) {
            model.position.set(-1, 4, -16);
        }
        tilesRuntime = runtime;
        scene.add(model);
        statsRuntime = new StatsWidget(runtime.getStats(), { container: statsParent });
        statsParent.style.visibility = 'visible';
    });
}
function render(t) {
    const dt = clock.getDelta();
    controls.update(t);
    if (tilesRuntime) {
        tilesRuntime.update(dt, renderer, camera);
    }
    if (statsRuntime) {
        statsRuntime.update();
    }
    renderer.render(scene, camera);
    threeJsStats.update();
    window.requestAnimationFrame(render);
}
onWindowResize();
function onWindowResize() {
    renderer.setSize(canvasParent.clientWidth, canvasParent.clientHeight);
    camera.aspect = canvasParent.clientWidth / canvasParent.clientHeight;
    camera.updateProjectionMatrix();
}
window.addEventListener('resize', onWindowResize);
render(undefined);

export { GeoTransform, Loader3DTiles, PointCloudColoring, Shading };
//# sourceMappingURL=three-loader-3dtiles.esm.js.map
