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+import { B3DMLoader } from '../src/index.js';
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+import {
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+ Scene,
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+ DirectionalLight,
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+ AmbientLight,
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+ WebGLRenderer,
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+ PerspectiveCamera,
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+ Box3,
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+ OrthographicCamera,
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+ sRGBEncoding,
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+ Group,
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+ PCFSoftShadowMap,
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+} from 'three';
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+import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
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+import * as dat from 'three/examples/jsm/libs/dat.gui.module.js';
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+
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+let camera, controls, scene, renderer, tiles, orthoCamera;
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+let offsetParent, box, dirLight;
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+let stats;
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+
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+const params = {
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+
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+};
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+
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+init();
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+animate();
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+
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+function init() {
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+
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+ scene = new Scene();
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+
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+ // primary camera view
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+ renderer = new WebGLRenderer( { antialias: true } );
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ renderer.setClearColor( 0x151c1f );
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+ renderer.shadowMap.enabled = true;
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+ renderer.shadowMap.type = PCFSoftShadowMap;
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+ renderer.outputEncoding = sRGBEncoding;
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+
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+ document.body.appendChild( renderer.domElement );
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+
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+ camera = new PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 4000 );
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+ camera.position.set( 400, 400, 400 );
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+
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+ orthoCamera = new OrthographicCamera();
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+
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+ // controls
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+ controls = new OrbitControls( camera, renderer.domElement );
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+ controls.screenSpacePanning = false;
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+ controls.minDistance = 1;
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+ controls.maxDistance = 2000;
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+
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+ // lights
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+ dirLight = new DirectionalLight( 0xffffff, 1.25 );
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+ dirLight.position.set( 1, 2, 3 ).multiplyScalar( 40 );
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+ dirLight.castShadow = true;
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+ dirLight.shadow.bias = - 0.01;
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+ dirLight.shadow.mapSize.setScalar( 2048 );
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+
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+ const shadowCam = dirLight.shadow.camera;
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+ shadowCam.left = - 200;
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+ shadowCam.bottom = - 200;
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+ shadowCam.right = 200;
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+ shadowCam.top = 200;
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+ shadowCam.updateProjectionMatrix();
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+
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+ scene.add( dirLight );
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+
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+ const ambLight = new AmbientLight( 0xffffff, 0.05 );
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+ scene.add( ambLight );
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+
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+ box = new Box3();
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+
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+ new B3DMLoader()
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+ .load( 'https://raw.githubusercontent.com/CesiumGS/3d-tiles-samples/master/tilesets/TilesetWithRequestVolume/city/lr.b3dm' )
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+ .then( res => {
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+
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+ console.log( res );
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+ scene.add( res.scene );
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+
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+ } );
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+
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+ onWindowResize();
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ // GUI
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+ const gui = new dat.GUI();
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+ gui.width = 300;
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+ gui.open();
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+
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+}
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+
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+function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ camera.updateProjectionMatrix();
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+
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+ updateOrthoCamera();
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+
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+}
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+
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+function updateOrthoCamera() {
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+
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+ orthoCamera.position.copy( camera.position );
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+ orthoCamera.rotation.copy( camera.rotation );
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+
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+ const scale = camera.position.distanceTo( controls.target ) / 2.0;
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+ let aspect = window.innerWidth / window.innerHeight;
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+ orthoCamera.left = - aspect * scale;
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+ orthoCamera.right = aspect * scale;
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+ orthoCamera.bottom = - scale;
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+ orthoCamera.top = scale;
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+ orthoCamera.near = camera.near;
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+ orthoCamera.far = camera.far;
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+ orthoCamera.updateProjectionMatrix();
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+
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+}
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+
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+function animate() {
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+
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+ requestAnimationFrame( animate );
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+
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+ render();
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+
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+}
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+
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+function render() {
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+
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+ updateOrthoCamera();
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+
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+ renderer.render( scene, params.orthographic ? orthoCamera : camera );
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+
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+}
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Garrett Johnson