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488 lines
13 KiB
488 lines
13 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - three-gpu-pathtracer</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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color: #444;
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background-color: white;
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}
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a {
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color: #fb8c00;
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}
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.checkerboard {
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background-image:
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linear-gradient(45deg, #ddd 25%, transparent 25%),
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linear-gradient(-45deg, #ddd 25%, transparent 25%),
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linear-gradient(45deg, transparent 75%, #ddd 75%),
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linear-gradient(-45deg, transparent 75%, #ddd 75%);
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background-size: 20px 20px;
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background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
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}
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.lil-gui .gui-render {
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line-height: var(--widget-height);
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padding: var(--padding);
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}
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</style>
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> pathtracer - <a href="https://github.com/gkjohnson/three-gpu-pathtracer" target="_blank" rel="noopener">three-gpu-pathtracer</a><br/>
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See <a href="https://github.com/gkjohnson/three-gpu-pathtracer" target="_blank" rel="noopener">main project repository</a> for more information and examples on high fidelity path tracing.
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/",
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"three/examples/": "./",
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"three-gpu-pathtracer": "https://unpkg.com/three-gpu-pathtracer@0.0.7/build/index.module.js",
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"three-mesh-bvh": "https://unpkg.com/three-mesh-bvh@^0.5.10/build/index.module.js"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
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import { LDrawLoader } from 'three/addons/loaders/LDrawLoader.js';
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import { LDrawUtils } from 'three/addons/utils/LDrawUtils.js';
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import { FullScreenQuad } from 'three/addons/postprocessing/Pass.js';
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import { PhysicalPathTracingMaterial, PathTracingRenderer, MaterialReducer, BlurredEnvMapGenerator, PathTracingSceneGenerator } from 'three-gpu-pathtracer';
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let progressBarDiv, samplesEl;
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let camera, scene, renderer, controls, gui;
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let pathTracer, sceneInfo, fsQuad, floor;
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let delaySamples = 0;
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const params = {
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enable: true,
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toneMapping: true,
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pause: false,
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tiles: 3,
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transparentBackground: false,
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resolutionScale: 1,
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download: () => {
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const link = document.createElement( 'a' );
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link.download = 'pathtraced-render.png';
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link.href = renderer.domElement.toDataURL().replace( 'image/png', 'image/octet-stream' );
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link.click();
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},
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roughness: 0.15,
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metalness: 0.9,
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};
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init();
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render();
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function init() {
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.set( 150, 200, 250 );
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// initialize the renderer
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renderer = new THREE.WebGLRenderer( { antialias: true, preserveDrawingBuffer: true, premultipliedAlpha: false } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.outputEncoding = THREE.sRGBEncoding;
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renderer.toneMapping = THREE.ACESFilmicToneMapping;
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renderer.setClearColor( 0xdddddd );
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document.body.appendChild( renderer.domElement );
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// initialize the pathtracer
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pathTracer = new PathTracingRenderer( renderer );
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pathTracer.alpha = true;
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pathTracer.tiles.set( params.tiles, params.tiles );
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pathTracer.material = new PhysicalPathTracingMaterial();
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pathTracer.material.setDefine( 'FEATURE_GRADIENT_BG', 1 );
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pathTracer.material.setDefine( 'FEATURE_MIS', 1 );
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pathTracer.material.bgGradientTop.set( 0xeeeeee );
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pathTracer.material.bgGradientBottom.set( 0xeaeaea );
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pathTracer.camera = camera;
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fsQuad = new FullScreenQuad( new THREE.MeshBasicMaterial( {
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map: pathTracer.target.texture,
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blending: THREE.CustomBlending
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} ) );
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// scene
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scene = new THREE.Scene();
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controls = new OrbitControls( camera, renderer.domElement );
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controls.addEventListener( 'change', () => {
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delaySamples = 5;
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pathTracer.reset();
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} );
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window.addEventListener( 'resize', onWindowResize );
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onWindowResize();
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progressBarDiv = document.createElement( 'div' );
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progressBarDiv.innerText = 'Loading...';
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progressBarDiv.style.fontSize = '3em';
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progressBarDiv.style.color = '#888';
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progressBarDiv.style.display = 'block';
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progressBarDiv.style.position = 'absolute';
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progressBarDiv.style.top = '50%';
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progressBarDiv.style.width = '100%';
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progressBarDiv.style.textAlign = 'center';
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// load materials and then the model
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createGUI();
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loadModel();
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}
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async function loadModel() {
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progressBarDiv.innerText = 'Loading...';
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let model = null;
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let envMap = null;
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updateProgressBar( 0 );
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showProgressBar();
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// only smooth when not rendering with flat colors to improve processing time
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const ldrawPromise =
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new LDrawLoader()
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.setPath( 'models/ldraw/officialLibrary/' )
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.loadAsync( 'models/7140-1-X-wingFighter.mpd_Packed.mpd', onProgress )
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.then( function ( legoGroup ) {
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legoGroup = LDrawUtils.mergeObject( legoGroup );
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legoGroup.rotation.x = Math.PI;
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model = new THREE.Group();
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model.add( legoGroup );
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// Convert from LDraw coordinates: rotate 180 degrees around OX
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model.updateMatrixWorld();
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} )
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.catch( onError );
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const envMapPromise =
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new RGBELoader()
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.setPath( 'textures/equirectangular/' )
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.loadAsync( 'royal_esplanade_1k.hdr' )
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.then( tex => {
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const envMapGenerator = new BlurredEnvMapGenerator( renderer );
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const blurredEnvMap = envMapGenerator.generate( tex, 0 );
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scene.environment = blurredEnvMap;
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envMap = blurredEnvMap;
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} );
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await Promise.all( [ envMapPromise, ldrawPromise ] );
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hideProgressBar();
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document.body.classList.add( 'checkerboard' );
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// Adjust camera
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const bbox = new THREE.Box3().setFromObject( model );
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const size = bbox.getSize( new THREE.Vector3() );
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const radius = Math.max( size.x, Math.max( size.y, size.z ) ) * 0.4;
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controls.target0.copy( bbox.getCenter( new THREE.Vector3() ) );
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controls.position0.set( 2.3, 1, 2 ).multiplyScalar( radius ).add( controls.target0 );
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controls.reset();
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// add floor
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floor = new THREE.Mesh(
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new THREE.PlaneGeometry(),
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new THREE.MeshStandardMaterial( {
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side: THREE.DoubleSide,
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roughness: 0.01,
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metalness: 1,
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map: generateRadialFloorTexture( 1024 ),
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transparent: true,
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} ),
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);
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floor.scale.setScalar( 2500 );
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floor.rotation.x = - Math.PI / 2;
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floor.position.y = bbox.min.y;
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model.add( floor );
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model.updateMatrixWorld();
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// de-duplicate and reduce the number of materials used in place
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const reducer = new MaterialReducer();
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reducer.process( model );
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// reset the progress bar to display bvh generation
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progressBarDiv.innerText = 'Generating BVH...';
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updateProgressBar( 0 );
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const generator = new PathTracingSceneGenerator();
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const result = generator.generate( model );
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// add the model to the scene
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sceneInfo = result;
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sceneInfo.scene.traverse( c => {
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if ( c.isLineSegments ) {
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c.visible = false;
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}
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} );
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scene.add( sceneInfo.scene );
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// update the material
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const { bvh, textures, materials } = result;
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const geometry = bvh.geometry;
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const material = pathTracer.material;
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material.bvh.updateFrom( bvh );
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material.normalAttribute.updateFrom( geometry.attributes.normal );
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material.tangentAttribute.updateFrom( geometry.attributes.tangent );
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material.uvAttribute.updateFrom( geometry.attributes.uv );
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material.materialIndexAttribute.updateFrom( geometry.attributes.materialIndex );
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// material.colorAttribute.updateFrom( geometry.attributes.color );
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material.textures.setTextures( renderer, 2048, 2048, textures );
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material.materials.updateFrom( materials, textures );
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pathTracer.material.envMapInfo.updateFrom( envMap );
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pathTracer.reset();
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}
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function onWindowResize() {
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const w = window.innerWidth;
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const h = window.innerHeight;
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const scale = params.resolutionScale;
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const dpr = window.devicePixelRatio;
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pathTracer.setSize( w * scale * dpr, h * scale * dpr );
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pathTracer.reset();
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renderer.setSize( w, h );
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renderer.setPixelRatio( window.devicePixelRatio * scale );
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const aspect = w / h;
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camera.aspect = aspect;
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camera.updateProjectionMatrix();
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}
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function createGUI() {
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if ( gui ) {
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gui.destroy();
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}
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gui = new GUI();
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gui.add( params, 'enable' );
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gui.add( params, 'pause' );
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gui.add( params, 'toneMapping' );
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gui.add( params, 'transparentBackground' ).onChange( v => {
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pathTracer.material.backgroundAlpha = v ? 0 : 1;
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renderer.setClearAlpha( v ? 0 : 1 );
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pathTracer.reset();
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} );
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gui.add( params, 'resolutionScale', 0.1, 1.0 ).onChange( onWindowResize );
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gui.add( params, 'tiles', 1, 3, 1 ).onChange( v => {
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pathTracer.tiles.set( v, v );
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} );
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gui.add( params, 'roughness', 0, 1 ).name( 'floor roughness' ).onChange( () => {
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pathTracer.reset();
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} );
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gui.add( params, 'metalness', 0, 1 ).name( 'floor metalness' ).onChange( () => {
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pathTracer.reset();
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} );
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gui.add( params, 'download' ).name( 'download image' );
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const renderFolder = gui.addFolder( 'Render' );
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samplesEl = document.createElement( 'div' );
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samplesEl.classList.add( 'gui-render' );
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samplesEl.innerText = 'samples: 0';
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renderFolder.$children.appendChild( samplesEl );
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renderFolder.open();
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}
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//
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function render() {
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requestAnimationFrame( render );
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if ( ! sceneInfo ) {
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return;
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}
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renderer.toneMapping = params.toneMapping ? THREE.ACESFilmicToneMapping : THREE.NoToneMapping;
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if ( pathTracer.samples < 1.0 || ! params.enable ) {
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renderer.render( scene, camera );
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}
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if ( params.enable && delaySamples === 0 ) {
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const samples = Math.floor( pathTracer.samples );
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samplesEl.innerText = `samples: ${ samples }`;
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floor.material.roughness = params.roughness;
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floor.material.metalness = params.metalness;
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pathTracer.material.materials.updateFrom( sceneInfo.materials, sceneInfo.textures );
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pathTracer.material.filterGlossyFactor = 0.5;
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pathTracer.material.physicalCamera.updateFrom( camera );
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camera.updateMatrixWorld();
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if ( ! params.pause || pathTracer.samples < 1 ) {
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pathTracer.update();
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}
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renderer.autoClear = false;
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fsQuad.render( renderer );
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renderer.autoClear = true;
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} else if ( delaySamples > 0 ) {
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delaySamples --;
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}
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samplesEl.innerText = `samples: ${ Math.floor( pathTracer.samples ) }`;
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}
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function onProgress( xhr ) {
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if ( xhr.lengthComputable ) {
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updateProgressBar( xhr.loaded / xhr.total );
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console.log( Math.round( xhr.loaded / xhr.total * 100, 2 ) + '% downloaded' );
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}
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}
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function onError( error ) {
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const message = 'Error loading model';
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progressBarDiv.innerText = message;
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console.log( message );
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console.error( error );
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}
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function showProgressBar() {
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document.body.appendChild( progressBarDiv );
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}
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function hideProgressBar() {
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document.body.removeChild( progressBarDiv );
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}
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function updateProgressBar( fraction ) {
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progressBarDiv.innerText = 'Loading... ' + Math.round( fraction * 100, 2 ) + '%';
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}
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function generateRadialFloorTexture( dim ) {
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const data = new Uint8Array( dim * dim * 4 );
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for ( let x = 0; x < dim; x ++ ) {
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for ( let y = 0; y < dim; y ++ ) {
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const xNorm = x / ( dim - 1 );
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const yNorm = y / ( dim - 1 );
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const xCent = 2.0 * ( xNorm - 0.5 );
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const yCent = 2.0 * ( yNorm - 0.5 );
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let a = Math.max( Math.min( 1.0 - Math.sqrt( xCent ** 2 + yCent ** 2 ), 1.0 ), 0.0 );
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a = a ** 1.5;
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a = a * 1.5;
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a = Math.min( a, 1.0 );
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const i = y * dim + x;
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data[ i * 4 + 0 ] = 255;
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data[ i * 4 + 1 ] = 255;
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data[ i * 4 + 2 ] = 255;
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data[ i * 4 + 3 ] = a * 255;
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}
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}
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const tex = new THREE.DataTexture( data, dim, dim );
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tex.format = THREE.RGBAFormat;
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tex.type = THREE.UnsignedByteType;
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tex.minFilter = THREE.LinearFilter;
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tex.magFilter = THREE.LinearFilter;
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tex.wrapS = THREE.RepeatWrapping;
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tex.wrapT = THREE.RepeatWrapping;
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tex.needsUpdate = true;
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return tex;
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}
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</script>
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<!-- LDraw.org CC BY 2.0 Parts Library attribution -->
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<div style="display: block; position: absolute; bottom: 8px; left: 8px; width: 160px; padding: 10px; background-color: #F3F7F8;">
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<center>
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<a href="http://www.ldraw.org"><img style="width: 145px" src="models/ldraw/ldraw_org_logo/Stamp145.png"></a>
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<br />
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<a href="http://www.ldraw.org/">This software uses the LDraw Parts Library</a>
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</center>
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</div>
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</body>
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</html>
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