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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <title>three.js white furnace test</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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+ <style>
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+ body {
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+ background:#777;
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+ padding:0;
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+ margin:0;
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+ font-weight: bold;
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+ overflow:hidden;
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+ }
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+
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+ #info {
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+ position: absolute;
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+ top: 0px;
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+ min-width: 60%;
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+ margin: 0 20%;
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+ color: #ffffff;
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+ padding: 15px;
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+ font-family:Monospace;
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+ font-size:13px;
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+ text-align:center;
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+ background-color: black;
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+ color: white;
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+ }
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+
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+ a {
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+ color: #ffffff;
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+ }
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+ </style>
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+
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+ <script src="../build/three.js"></script>
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+ <script src="js/WebGL.js"></script>
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+ <script src="js/loaders/EquirectangularToCubeGenerator.js"></script>
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+ <script src="js/pmrem/PMREMGenerator.js"></script>
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+ <script src="js/pmrem/PMREMCubeUVPacker.js"></script>
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+
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+ </head>
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+ <body>
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+
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+ <div id="container">
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+ <div id="info">
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+ <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> -
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+ <a href="https://google.github.io/filament/Filament.md.html#toc4.7.2" target="_blank" rel="noopener">White Furnace</a> energy conservation test.<br />
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+ There are 11 fully metal spheres with full white specular color and increasing roughness values rendered here. A metal object, no matter how rough, fully reflects all energy. If uniformly lit, the spheres should be indistinguishable from the environment. If spheres are visible, then some energy has been lost or gained after reflection.<br />
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+ <a href="https://jsantell.com/" target="_blank" rel="noopener">by Jordan Santell</a><br/><br/></div>
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+ </div>
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+
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+ <script>
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+
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+if ( WEBGL.isWebGLAvailable() === false ) {
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+
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+ document.body.appendChild( WEBGL.getWebGLErrorMessage() );
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+
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+}
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+
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+var scene, camera, renderer, envMap, radianceMap, gui;
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+var right = 6;
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+var config = {
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+ preserveEnergy: true,
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+};
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+
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+function init() {
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+
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+ var width = window.innerWidth;
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+ var height = window.innerHeight;
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+ var aspect = width / height;
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+
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+ // renderer
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+
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+ renderer = new THREE.WebGLRenderer( { antialias: true } );
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+ renderer.setSize( width, height );
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ document.body.appendChild( renderer.domElement );
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+
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+ window.addEventListener( 'resize', onResize, false );
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+
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+ // scene
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+
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+ scene = new THREE.Scene();
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+
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+ // camera
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+
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+ camera = new THREE.OrthographicCamera( - right, right, right / aspect, - right / aspect, 1, 30 );
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+ camera.position.set( 0, 0, 9 );
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+
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+}
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+
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+function createObjects() {
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+
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+ var geo = new THREE.SphereBufferGeometry( 0.4, 32, 32 );
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+ var count = 10;
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+ for ( var x = 0; x <= count; x ++ ) {
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+
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+ var mesh = new THREE.Mesh( geo, new THREE.MeshPhysicalMaterial( {
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+ roughness: x / count,
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+ metalness: 1,
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+ color: 0xffffff,
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+ envMap: radianceMap,
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+ envMapIntensity: 1,
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+ reflectivity: 1,
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+ } ) );
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+ mesh.position.x = x - ( Math.floor( count / 2 ) );
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+ scene.add( mesh );
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+
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+ }
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+
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+}
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+
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+function createEnvironment() {
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+
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+ var color = new THREE.Color( 0xcccccc );
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+ var sky = new THREE.Mesh( new THREE.SphereBufferGeometry( 1, 32, 32 ), new THREE.MeshBasicMaterial( {
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+ color: color,
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+ side: THREE.DoubleSide,
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+ } ) );
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+ sky.scale.setScalar( 100 );
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+
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+ var envScene = new THREE.Scene();
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+ envScene.add( sky );
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+ envScene.background = color;
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+ var cubeCamera = new THREE.CubeCamera( 1, 100, 256, 256 );
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+ cubeCamera.update( renderer, envScene );
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+
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+ envMap = cubeCamera.renderTarget.texture;
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+
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+ scene.background = color;
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+
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+}
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+
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+function getRadiance() {
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+
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+ return new Promise( function ( resolve, reject ) {
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+
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+ var pmremGenerator = new THREE.PMREMGenerator( envMap );
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+ pmremGenerator.update( renderer );
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+ var pmremCubeUVPacker = new THREE.PMREMCubeUVPacker( pmremGenerator.cubeLods );
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+ pmremCubeUVPacker.update( renderer );
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+ var cubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;
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+
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+ pmremGenerator.dispose();
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+ pmremCubeUVPacker.dispose();
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+ radianceMap = cubeRenderTarget.texture;
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+ resolve();
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+
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+ } );
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+
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+}
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+
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+function onResize() {
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+
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+ var aspect = window.innerWidth / window.innerHeight;
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+ camera.top = right / aspect;
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+ camera.bottom = - camera.top;
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+ camera.updateProjectionMatrix();
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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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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+ renderer.render( scene, camera );
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+
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+}
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+
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+Promise.resolve()
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+ .then( init )
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+ .then( createEnvironment )
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+ .then( getRadiance )
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+ .then( createObjects )
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+ .then( render );
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+
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+ </script>
|
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+ </body>
|
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+</html>
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Jordan Santell