laser_v1/js/THREE.MeshLine.js

function MeshLine_plugin() {

    ;(function () {

        "use strict";

        var root = this

        var has_require = typeof require !== 'undefined'

        var THREE = root.IV.THREE || has_require && require('three')
        if (!THREE)
            throw new Error('MeshLine requires three.js')

        function MeshLine() {

            this.positions = [];

            this.previous = [];
            this.next = [];
            this.side = [];
            this.width = [];
            this.indices_array = [];
            this.uvs = [];
            this.counters = [];
            this.geometry = new THREE.BufferGeometry();

            this.widthCallback = null;

            // Used to raycast
            this.matrixWorld = new THREE.Matrix4();
        }

        MeshLine.prototype.setMatrixWorld = function (matrixWorld) {
            this.matrixWorld = matrixWorld;
        }


        MeshLine.prototype.setGeometry = function (g, c) {

            this.widthCallback = c;

            this.positions = [];
            this.counters = [];
            // g.computeBoundingBox();
            // g.computeBoundingSphere();

            // set the normals
            // g.computeVertexNormals();
            if (g instanceof THREE.Geometry) {
                for (var j = 0; j < g.vertices.length; j++) {
                    var v = g.vertices[j];
                    var c = j / g.vertices.length;
                    this.positions.push(v.x, v.y, v.z);
                    this.positions.push(v.x, v.y, v.z);
                    this.counters.push(c);
                    this.counters.push(c);
                }
            }

            if (g instanceof THREE.BufferGeometry) {
                // read attribute positions ?
            }

            if (g instanceof Float32Array || g instanceof Array) {
                for (var j = 0; j < g.length; j += 3) {
                    var c = j / g.length;
                    this.positions.push(g[j], g[j + 1], g[j + 2]);
                    this.positions.push(g[j], g[j + 1], g[j + 2]);
                    this.counters.push(c);
                    this.counters.push(c);
                }
            }

            this.process();

        }

        MeshLine.prototype.raycast = (function () {

            var inverseMatrix = new THREE.Matrix4();
            var ray = new THREE.Ray();
            var sphere = new THREE.Sphere();

            return function raycast(raycaster, intersects) {

                var precision = raycaster.linePrecision;
                var precisionSq = precision * precision;

                var geometry = this.geometry;

                if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

                // Checking boundingSphere distance to ray

                sphere.copy(geometry.boundingSphere);
                sphere.applyMatrix4(this.matrixWorld);

                if (raycaster.ray.intersectSphere(sphere) === false) {

                    return;

                }

                inverseMatrix.getInverse(this.matrixWorld);
                ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);

                var vStart = new THREE.Vector3();
                var vEnd = new THREE.Vector3();
                var interSegment = new THREE.Vector3();
                var interRay = new THREE.Vector3();
                var step = this instanceof THREE.LineSegments ? 2 : 1;

                if (geometry instanceof THREE.BufferGeometry) {

                    var index = geometry.index;
                    var attributes = geometry.attributes;

                    if (index !== null) {

                        var indices = index.array;
                        var positions = attributes.position.array;

                        for (var i = 0, l = indices.length - 1; i < l; i += step) {

                            var a = indices[i];
                            var b = indices[i + 1];

                            vStart.fromArray(positions, a * 3);
                            vEnd.fromArray(positions, b * 3);

                            var distSq = ray.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

                            if (distSq > precisionSq) continue;

                            interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

                            var distance = raycaster.ray.origin.distanceTo(interRay);

                            if (distance < raycaster.near || distance > raycaster.far) continue;

                            intersects.push({

                                distance: distance,
                                // What do we want? intersection point on the ray or on the segment??
                                // point: raycaster.ray.at( distance ),
                                point: interSegment.clone().applyMatrix4(this.matrixWorld),
                                index: i,
                                face: null,
                                faceIndex: null,
                                object: this

                            });

                        }

                    } else {

                        var positions = attributes.position.array;

                        for (var i = 0, l = positions.length / 3 - 1; i < l; i += step) {

                            vStart.fromArray(positions, 3 * i);
                            vEnd.fromArray(positions, 3 * i + 3);

                            var distSq = ray.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

                            if (distSq > precisionSq) continue;

                            interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

                            var distance = raycaster.ray.origin.distanceTo(interRay);

                            if (distance < raycaster.near || distance > raycaster.far) continue;

                            intersects.push({

                                distance: distance,
                                // What do we want? intersection point on the ray or on the segment??
                                // point: raycaster.ray.at( distance ),
                                point: interSegment.clone().applyMatrix4(this.matrixWorld),
                                index: i,
                                face: null,
                                faceIndex: null,
                                object: this

                            });

                        }

                    }

                } else if (geometry instanceof THREE.Geometry) {

                    var vertices = geometry.vertices;
                    var nbVertices = vertices.length;

                    for (var i = 0; i < nbVertices - 1; i += step) {

                        var distSq = ray.distanceSqToSegment(vertices[i], vertices[i + 1], interRay, interSegment);

                        if (distSq > precisionSq) continue;

                        interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

                        var distance = raycaster.ray.origin.distanceTo(interRay);

                        if (distance < raycaster.near || distance > raycaster.far) continue;

                        intersects.push({

                            distance: distance,
                            // What do we want? intersection point on the ray or on the segment??
                            // point: raycaster.ray.at( distance ),
                            point: interSegment.clone().applyMatrix4(this.matrixWorld),
                            index: i,
                            face: null,
                            faceIndex: null,
                            object: this

                        });

                    }

                }

            };

        }());


        MeshLine.prototype.compareV3 = function (a, b) {

            var aa = a * 6;
            var ab = b * 6;
            return (this.positions[aa] === this.positions[ab]) && (this.positions[aa + 1] === this.positions[ab + 1]) && (this.positions[aa + 2] === this.positions[ab + 2]);

        }

        MeshLine.prototype.copyV3 = function (a) {

            var aa = a * 6;
            return [this.positions[aa], this.positions[aa + 1], this.positions[aa + 2]];

        }

        MeshLine.prototype.process = function () {

            var l = this.positions.length / 6;

            this.previous = [];
            this.next = [];
            this.side = [];
            this.width = [];
            this.indices_array = [];
            this.uvs = [];

            for (var j = 0; j < l; j++) {
                this.side.push(1);
                this.side.push(-1);
            }

            var w;
            for (var j = 0; j < l; j++) {
                if (this.widthCallback) w = this.widthCallback(j / (l - 1));
                else w = 1;
                this.width.push(w);
                this.width.push(w);
            }

            for (var j = 0; j < l; j++) {
                this.uvs.push(j / (l - 1), 0);
                this.uvs.push(j / (l - 1), 1);
            }

            var v;

            if (this.compareV3(0, l - 1)) {
                v = this.copyV3(l - 2);
            } else {
                v = this.copyV3(0);
            }
            this.previous.push(v[0], v[1], v[2]);
            this.previous.push(v[0], v[1], v[2]);
            for (var j = 0; j < l - 1; j++) {
                v = this.copyV3(j);
                this.previous.push(v[0], v[1], v[2]);
                this.previous.push(v[0], v[1], v[2]);
            }

            for (var j = 1; j < l; j++) {
                v = this.copyV3(j);
                this.next.push(v[0], v[1], v[2]);
                this.next.push(v[0], v[1], v[2]);
            }

            if (this.compareV3(l - 1, 0)) {
                v = this.copyV3(1);
            } else {
                v = this.copyV3(l - 1);
            }
            this.next.push(v[0], v[1], v[2]);
            this.next.push(v[0], v[1], v[2]);

            for (var j = 0; j < l - 1; j++) {
                var n = j * 2;
                this.indices_array.push(n, n + 1, n + 2);
                this.indices_array.push(n + 2, n + 1, n + 3);
            }

            if (!this.attributes) {
                this.attributes = {
                    position: new THREE.BufferAttribute(new Float32Array(this.positions), 3),
                    previous: new THREE.BufferAttribute(new Float32Array(this.previous), 3),
                    next: new THREE.BufferAttribute(new Float32Array(this.next), 3),
                    side: new THREE.BufferAttribute(new Float32Array(this.side), 1),
                    width: new THREE.BufferAttribute(new Float32Array(this.width), 1),
                    uv: new THREE.BufferAttribute(new Float32Array(this.uvs), 2),
                    index: new THREE.BufferAttribute(new Uint16Array(this.indices_array), 1),
                    counters: new THREE.BufferAttribute(new Float32Array(this.counters), 1)
                }
            } else {
                this.attributes.position.copyArray(new Float32Array(this.positions));
                this.attributes.position.needsUpdate = true;
                this.attributes.previous.copyArray(new Float32Array(this.previous));
                this.attributes.previous.needsUpdate = true;
                this.attributes.next.copyArray(new Float32Array(this.next));
                this.attributes.next.needsUpdate = true;
                this.attributes.side.copyArray(new Float32Array(this.side));
                this.attributes.side.needsUpdate = true;
                this.attributes.width.copyArray(new Float32Array(this.width));
                this.attributes.width.needsUpdate = true;
                this.attributes.uv.copyArray(new Float32Array(this.uvs));
                this.attributes.uv.needsUpdate = true;
                this.attributes.index.copyArray(new Uint16Array(this.indices_array));
                this.attributes.index.needsUpdate = true;
            }

            this.geometry.addAttribute('position', this.attributes.position);
            this.geometry.addAttribute('previous', this.attributes.previous);
            this.geometry.addAttribute('next', this.attributes.next);
            this.geometry.addAttribute('side', this.attributes.side);
            this.geometry.addAttribute('width', this.attributes.width);
            this.geometry.addAttribute('uv', this.attributes.uv);
            this.geometry.addAttribute('counters', this.attributes.counters);

            this.geometry.setIndex(this.attributes.index);

        }

        function memcpy(src, srcOffset, dst, dstOffset, length) {
            var i

            src = src.subarray || src.slice ? src : src.buffer
            dst = dst.subarray || dst.slice ? dst : dst.buffer

            src = srcOffset ? src.subarray ?
                src.subarray(srcOffset, length && srcOffset + length) :
                src.slice(srcOffset, length && srcOffset + length) : src

            if (dst.set) {
                dst.set(src, dstOffset)
            } else {
                for (i = 0; i < src.length; i++) {
                    dst[i + dstOffset] = src[i]
                }
            }

            return dst
        }

        /**
         * Fast method to advance the line by one position.  The oldest position is removed.
         * @param position
         */
        MeshLine.prototype.advance = function (position) {

            var positions = this.attributes.position.array;
            var previous = this.attributes.previous.array;
            var next = this.attributes.next.array;
            var l = positions.length;

            // PREVIOUS
            memcpy(positions, 0, previous, 0, l);

            // POSITIONS
            memcpy(positions, 6, positions, 0, l - 6);

            positions[l - 6] = position.x;
            positions[l - 5] = position.y;
            positions[l - 4] = position.z;
            positions[l - 3] = position.x;
            positions[l - 2] = position.y;
            positions[l - 1] = position.z;

            // NEXT
            memcpy(positions, 6, next, 0, l - 6);

            next[l - 6] = position.x;
            next[l - 5] = position.y;
            next[l - 4] = position.z;
            next[l - 3] = position.x;
            next[l - 2] = position.y;
            next[l - 1] = position.z;

            this.attributes.position.needsUpdate = true;
            this.attributes.previous.needsUpdate = true;
            this.attributes.next.needsUpdate = true;

        };

        THREE.ShaderChunk['meshline_vert'] = [
            '',
            THREE.ShaderChunk.logdepthbuf_pars_vertex,
            THREE.ShaderChunk.fog_pars_vertex,
            '',
            'attribute vec3 previous;',
            'attribute vec3 next;',
            'attribute float side;',
            'attribute float width;',
            'attribute float counters;',
            '',
            'uniform vec2 resolution;',
            'uniform float lineWidth;',
            'uniform vec3 color;',
            'uniform float opacity;',
            'uniform float near;',
            'uniform float far;',
            'uniform float sizeAttenuation;',
            '',
            'varying vec2 vUV;',
            'varying vec4 vColor;',
            'varying float vCounters;',
            '',
            'vec2 fix( vec4 i, float aspect ) {',
            '',
            '    vec2 res = i.xy / i.w;',
            '    res.x *= aspect;',
            '	 vCounters = counters;',
            '    return res;',
            '',
            '}',
            '',
            'void main() {',
            '',
            '    float aspect = resolution.x / resolution.y;',
            '    float pixelWidthRatio = 1. / (resolution.x * projectionMatrix[0][0]);',
            '',
            '    vColor = vec4( color, opacity );',
            '    vUV = uv;',
            '',
            '    mat4 m = projectionMatrix * modelViewMatrix;',
            '    vec4 finalPosition = m * vec4( position, 1.0 );',
            '    vec4 prevPos = m * vec4( previous, 1.0 );',
            '    vec4 nextPos = m * vec4( next, 1.0 );',
            '',
            '    vec2 currentP = fix( finalPosition, aspect );',
            '    vec2 prevP = fix( prevPos, aspect );',
            '    vec2 nextP = fix( nextPos, aspect );',
            '',
            '    float pixelWidth = finalPosition.w * pixelWidthRatio;',
            '    float w = 1.8 * pixelWidth * lineWidth * width;',
            '',
            '    if( sizeAttenuation == 1. ) {',
            '        w = 1.8 * lineWidth * width;',
            '    }',
            '',
            '    vec2 dir;',
            '    if( nextP == currentP ) dir = normalize( currentP - prevP );',
            '    else if( prevP == currentP ) dir = normalize( nextP - currentP );',
            '    else {',
            '        vec2 dir1 = normalize( currentP - prevP );',
            '        vec2 dir2 = normalize( nextP - currentP );',
            '        dir = normalize( dir1 + dir2 );',
            '',
            '        vec2 perp = vec2( -dir1.y, dir1.x );',
            '        vec2 miter = vec2( -dir.y, dir.x );',
            '        //w = clamp( w / dot( miter, perp ), 0., 4. * lineWidth * width );',
            '',
            '    }',
            '',
            '    //vec2 normal = ( cross( vec3( dir, 0. ), vec3( 0., 0., 1. ) ) ).xy;',
            '    vec2 normal = vec2( -dir.y, dir.x );',
            '    normal.x /= aspect;',
            '    normal *= .5 * w;',
            '',
            '    vec4 offset = vec4( normal * side, 0.0, 1.0 );',
            '    finalPosition.xy += offset.xy;',
            '',
            '    gl_Position = finalPosition;',
            '',
            THREE.ShaderChunk.logdepthbuf_vertex,
            THREE.ShaderChunk.fog_vertex && '    vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );',
            THREE.ShaderChunk.fog_vertex,
            '}'
        ].join('\r\n');

        THREE.ShaderChunk['meshline_frag'] = [
            '',
            THREE.ShaderChunk.fog_pars_fragment,
            THREE.ShaderChunk.logdepthbuf_pars_fragment,
            '',
            'uniform sampler2D map;',
            'uniform sampler2D alphaMap;',
            'uniform float useMap;',
            'uniform float useAlphaMap;',
            'uniform float useDash;',
            'uniform float dashArray;',
            'uniform float dashOffset;',
            'uniform float dashRatio;',
            'uniform float visibility;',
            'uniform float alphaTest;',
            'uniform vec2 repeat;',
            '',
            'varying vec2 vUV;',
            'varying vec4 vColor;',
            'varying float vCounters;',
            '',
            'void main() {',
            '',
            THREE.ShaderChunk.logdepthbuf_fragment,
            '',
            '    vec4 c = vColor;',
            '    if( useMap == 1. ) c *= texture2D( map, vUV * repeat );',
            '    if( useAlphaMap == 1. ) c.a *= texture2D( alphaMap, vUV * repeat ).a;',
            '    if( c.a < alphaTest ) discard;',
            '    if( useDash == 1. ){',
            '        c.a *= ceil(mod(vCounters + dashOffset, dashArray) - (dashArray * dashRatio));',
            '    }',
            '    gl_FragColor = c;',
            '    gl_FragColor.a *= step(vCounters, visibility);',
            '',
            THREE.ShaderChunk.fog_fragment,
            '}'
        ].join('\r\n');

        function MeshLineMaterial(parameters) {

            THREE.ShaderMaterial.call(this, {
                uniforms: Object.assign({},
                    THREE.UniformsLib.fog,
                    {
                        lineWidth: {value: 1},
                        map: {value: null},
                        useMap: {value: 0},
                        alphaMap: {value: null},
                        useAlphaMap: {value: 0},
                        color: {value: new THREE.Color(0xffffff)},
                        opacity: {value: 1},
                        resolution: {value: new THREE.Vector2(1, 1)},
                        sizeAttenuation: {value: 1},
                        near: {value: 1},
                        far: {value: 1},
                        dashArray: {value: 0},
                        dashOffset: {value: 0},
                        dashRatio: {value: 0.5},
                        useDash: {value: 0},
                        visibility: {value: 1},
                        alphaTest: {value: 0},
                        repeat: {value: new THREE.Vector2(1, 1)},
                    }
                ),

                vertexShader: THREE.ShaderChunk.meshline_vert,

                fragmentShader: THREE.ShaderChunk.meshline_frag,

            });

            this.type = 'MeshLineMaterial';

            Object.defineProperties(this, {
                lineWidth: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.lineWidth.value;
                    },
                    set: function (value) {
                        this.uniforms.lineWidth.value = value;
                    }
                },
                map: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.map.value;
                    },
                    set: function (value) {
                        this.uniforms.map.value = value;
                    }
                },
                useMap: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.useMap.value;
                    },
                    set: function (value) {
                        this.uniforms.useMap.value = value;
                    }
                },
                alphaMap: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.alphaMap.value;
                    },
                    set: function (value) {
                        this.uniforms.alphaMap.value = value;
                    }
                },
                useAlphaMap: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.useAlphaMap.value;
                    },
                    set: function (value) {
                        this.uniforms.useAlphaMap.value = value;
                    }
                },
                color: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.color.value;
                    },
                    set: function (value) {
                        this.uniforms.color.value = value;
                    }
                },
                opacity: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.opacity.value;
                    },
                    set: function (value) {
                        this.uniforms.opacity.value = value;
                    }
                },
                resolution: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.resolution.value;
                    },
                    set: function (value) {
                        this.uniforms.resolution.value.copy(value);
                    }
                },
                sizeAttenuation: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.sizeAttenuation.value;
                    },
                    set: function (value) {
                        this.uniforms.sizeAttenuation.value = value;
                    }
                },
                near: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.near.value;
                    },
                    set: function (value) {
                        this.uniforms.near.value = value;
                    }
                },
                far: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.far.value;
                    },
                    set: function (value) {
                        this.uniforms.far.value = value;
                    }
                },
                dashArray: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.dashArray.value;
                    },
                    set: function (value) {
                        this.uniforms.dashArray.value = value;
                        this.useDash = (value !== 0) ? 1 : 0
                    }
                },
                dashOffset: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.dashOffset.value;
                    },
                    set: function (value) {
                        this.uniforms.dashOffset.value = value;
                    }
                },
                dashRatio: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.dashRatio.value;
                    },
                    set: function (value) {
                        this.uniforms.dashRatio.value = value;
                    }
                },
                useDash: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.useDash.value;
                    },
                    set: function (value) {
                        this.uniforms.useDash.value = value;
                    }
                },
                visibility: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.visibility.value;
                    },
                    set: function (value) {
                        this.uniforms.visibility.value = value;
                    }
                },
                alphaTest: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.alphaTest.value;
                    },
                    set: function (value) {
                        this.uniforms.alphaTest.value = value;
                    }
                },
                repeat: {
                    enumerable: true,
                    get: function () {
                        return this.uniforms.repeat.value;
                    },
                    set: function (value) {
                        this.uniforms.repeat.value.copy(value);
                    }
                },
            });

            this.setValues(parameters);
        }

        MeshLineMaterial.prototype = Object.create(THREE.ShaderMaterial.prototype);
        MeshLineMaterial.prototype.constructor = MeshLineMaterial;
        MeshLineMaterial.prototype.isMeshLineMaterial = true;

        MeshLineMaterial.prototype.copy = function (source) {

            THREE.ShaderMaterial.prototype.copy.call(this, source);

            this.lineWidth = source.lineWidth;
            this.map = source.map;
            this.useMap = source.useMap;
            this.alphaMap = source.alphaMap;
            this.useAlphaMap = source.useAlphaMap;
            this.color.copy(source.color);
            this.opacity = source.opacity;
            this.resolution.copy(source.resolution);
            this.sizeAttenuation = source.sizeAttenuation;
            this.near = source.near;
            this.far = source.far;
            this.dashArray.copy(source.dashArray);
            this.dashOffset.copy(source.dashOffset);
            this.dashRatio.copy(source.dashRatio);
            this.useDash = source.useDash;
            this.visibility = source.visibility;
            this.alphaTest = source.alphaTest;
            this.repeat.copy(source.repeat);

            return this;

        };

        if (typeof exports !== 'undefined') {
            if (typeof module !== 'undefined' && module.exports) {
                exports = module.exports = {MeshLine: MeshLine, MeshLineMaterial: MeshLineMaterial};
            }
            exports.MeshLine = MeshLine;
            exports.MeshLineMaterial = MeshLineMaterial;
        }
        else {
            root.MeshLine = MeshLine;
            root.MeshLineMaterial = MeshLineMaterial;
        }

    }).call(this);
}