javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>threejs webgl - materials - hdr environment mapping</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				color: #fff;
				font-family:Monospace;
				font-size:13px;
				text-align:center;

				background-color: #000;

				margin: 0px;
				overflow: hidden;
			}
			a { color: #00f }

			#info {
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">threejs</a> - High dynamic range (RGBE) Image-based Lighting (IBL)<br />using run-time generated pre-filtered roughness mipmaps (PMREM)<br/>
			Created by Prashant Sharma and <a href="http://clara.io/" target="_blank" rel="noopener">Ben Houston</a>.</div>

		<script src="../build/three.js"></script>
		<script src="js/controls/OrbitControls.js"></script>

		<script src="js/loaders/RGBELoader.js"></script>
		<script src="js/loaders/HDRCubeTextureLoader.js"></script>

		<script src="js/Detector.js"></script>
		<script src="js/libs/stats.min.js"></script>

		<script src="js/pmrem/PMREMGenerator.js"></script>
		<script src="js/pmrem/PMREMCubeUVPacker.js"></script>
		<script src="js/libs/dat.gui.min.js"></script>

		<script>

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var container, stats;
			var params = {
				envMap: 'HDR',
				roughness: 0.0,
				metalness: 0.0,
				exposure: 1.0
			};
			var camera, scene, renderer, controls, objects = [];
			var standardMaterial, floorMaterial;
			var ldrCubeRenderTarget, hdrCubeRenderTarget, rgbmCubeRenderTarget;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 0, 120 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x000000 );

				renderer = new THREE.WebGLRenderer();
				renderer.toneMapping = THREE.LinearToneMapping;

				standardMaterial = new THREE.MeshStandardMaterial( {
					color: 0xffffff,
					metalness: params.metalness,
					roughness: params.roughness
				} );

				var geometry = new THREE.TorusKnotBufferGeometry( 18, 8, 150, 20 );

				var torusMesh1 = new THREE.Mesh( geometry, standardMaterial );

				scene.add( torusMesh1 );
				objects.push( torusMesh1 );

				floorMaterial = new THREE.MeshBasicMaterial( {
					color: 0xffffff,
				} );

				var planeGeometry = new THREE.PlaneBufferGeometry( 200, 200 );
				var planeMesh1 = new THREE.Mesh( planeGeometry, floorMaterial );
				planeMesh1.position.y = - 50;
				planeMesh1.rotation.x = - Math.PI * 0.5;
				scene.add( planeMesh1 );

				var genCubeUrls = function( prefix, postfix ) {
					return [
						prefix + 'px' + postfix, prefix + 'nx' + postfix,
						prefix + 'py' + postfix, prefix + 'ny' + postfix,
						prefix + 'pz' + postfix, prefix + 'nz' + postfix
					];
				};

				var hdrUrls = genCubeUrls( './textures/cube/pisaHDR/', '.hdr' );
				new THREE.HDRCubeTextureLoader().load( THREE.UnsignedByteType, hdrUrls, function ( hdrCubeMap ) {

					var pmremGenerator = new THREE.PMREMGenerator( hdrCubeMap );
					pmremGenerator.update( renderer );

					var pmremCubeUVPacker = new THREE.PMREMCubeUVPacker( pmremGenerator.cubeLods );
					pmremCubeUVPacker.update( renderer );

					hdrCubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;

					hdrCubeMap.dispose();
					pmremGenerator.dispose();
					pmremCubeUVPacker.dispose();

				} );

				var ldrUrls = genCubeUrls( './textures/cube/pisa/', '.png' );
				new THREE.CubeTextureLoader().load( ldrUrls, function ( ldrCubeMap ) {

					ldrCubeMap.encoding = THREE.GammaEncoding;

					var pmremGenerator = new THREE.PMREMGenerator( ldrCubeMap );
					pmremGenerator.update( renderer );

					var pmremCubeUVPacker = new THREE.PMREMCubeUVPacker( pmremGenerator.cubeLods );
					pmremCubeUVPacker.update( renderer );

					ldrCubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;

					ldrCubeMap.dispose();
					pmremGenerator.dispose();
					pmremCubeUVPacker.dispose();

				} );


				var rgbmUrls = genCubeUrls( './textures/cube/pisaRGBM16/', '.png' );
				new THREE.CubeTextureLoader().load( rgbmUrls, function ( rgbmCubeMap ) {

					rgbmCubeMap.encoding = THREE.RGBM16Encoding;

					var pmremGenerator = new THREE.PMREMGenerator( rgbmCubeMap );
					pmremGenerator.update( renderer );

					var pmremCubeUVPacker = new THREE.PMREMCubeUVPacker( pmremGenerator.cubeLods );
					pmremCubeUVPacker.update( renderer );

					rgbmCubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;

					rgbmCubeMap.dispose();
					pmremGenerator.dispose();
					pmremCubeUVPacker.dispose();

				} );

				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				//renderer.toneMapping = THREE.ReinhardToneMapping;
				renderer.gammaInput = true; // ???
				renderer.gammaOutput = true;

				stats = new Stats();
				container.appendChild( stats.dom );

				controls = new THREE.OrbitControls( camera, renderer.domElement );
				controls.minDistance = 50;
				controls.maxDistance = 300;

				window.addEventListener( 'resize', onWindowResize, false );

				var gui = new dat.GUI();

				gui.add( params, 'envMap', [ 'LDR', 'HDR', 'RGBM16' ] );
				gui.add( params, 'roughness', 0, 1 );
				gui.add( params, 'metalness', 0, 1 );
				gui.add( params, 'exposure', 0, 2 );
				gui.open();

			}

			function onWindowResize() {

				var width = window.innerWidth;
				var height = window.innerHeight;

				camera.aspect = width / height;
				camera.updateProjectionMatrix();

				renderer.setSize( width, height );

			}

			function animate() {

				requestAnimationFrame( animate );

				stats.begin();
				render();
				stats.end();

			}

			function render() {

				if ( standardMaterial !== undefined ) {

					standardMaterial.roughness = params.roughness;
					standardMaterial.metalness = params.metalness;

					var newEnvMap = standardMaterial.envMap;

					switch( params.envMap ) {

						case 'LDR': newEnvMap = ldrCubeRenderTarget ? ldrCubeRenderTarget.texture : null; break;
						case 'HDR': newEnvMap = hdrCubeRenderTarget ? hdrCubeRenderTarget.texture : null; break;
						case 'RGBM16': newEnvMap = rgbmCubeRenderTarget ? rgbmCubeRenderTarget.texture : null; break;

					}

					if ( newEnvMap !== standardMaterial.envMap ) {

						standardMaterial.envMap = newEnvMap;
						standardMaterial.needsUpdate = true;

						floorMaterial.map = newEnvMap;
						floorMaterial.needsUpdate = true;

					}

				}

				renderer.toneMappingExposure = params.exposure;

				for ( var i = 0, l = objects.length; i < l; i ++ ) {

					var object = objects[ i ];
					object.rotation.y += 0.005;

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>