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


			
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							<!DOCTYPE html>

<!--Reference:
SSAO algo: http://devlog-martinsh.blogspot.tw/2011/12/ssao-shader-update-v12.html?showComment=1398158188712#c1563204765906693531
log depth http://outerra.blogspot.tw/2013/07/logarithmic-depth-buffer-optimizations.html
convert the exponential depth to a linear value: http://www.ozone3d.net/blogs/lab/20090206/how-to-linearize-the-depth-value/
Spiral sampling http://web.archive.org/web/20120421191837/http://www.cgafaq.info/wiki/Evenly_distributed_points_on_sphere-->

<html lang="en">
	<head>
		<title>three.js webgl - postprocessing - Screen Space Ambient Occlusion</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 {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
				font-weight: bold;
			}

			a {
				color:#00ff78;
			}

			#info {
				color: #fff;
				position: absolute;
				top: 0px;
				width: 100%;
				padding: 5px;
			}
			.dg.ac {
				z-index: 1 !important; /* FIX DAT.GUI */
			}
		</style>
	</head>
	<body>
		<script src="../build/three.js"></script>

		<script src="js/shaders/SSAOShader.js"></script>
		<script src="js/shaders/CopyShader.js"></script>

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/RenderPass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>
		<script src="js/postprocessing/MaskPass.js"></script>
		<script src="js/postprocessing/SSAOPass.js"></script>

		<script src="js/WebGL.js"></script>
		<script src="js/libs/stats.min.js"></script>
		<script src='js/libs/dat.gui.min.js'></script>

		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl screen space ambient occlusion example<br/>
			shader by <a href="http://alteredqualia.com">alteredq</a>
		</div>

		<script>

			if ( WEBGL.isWebGLAvailable() === false ) {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			var container, stats;
			var camera, scene, renderer;
			var effectComposer;
			var ssaoPass;
			var group;

			var postprocessing = { enabled: true, onlyAO: false, radius: 32, aoClamp: 0.25, lumInfluence: 0.7 };

			init();
			animate();

			function init() {

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

				renderer = new THREE.WebGLRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 100, 700 );
				camera.position.z = 500;

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xa0a0a0 );

				group = new THREE.Object3D();
				scene.add( group );

				var geometry = new THREE.BoxBufferGeometry( 10, 10, 10 );
				for ( var i = 0; i < 200; i ++ ) {

					var material = new THREE.MeshBasicMaterial();
					material.color.r = Math.random();
					material.color.g = Math.random();
					material.color.b = Math.random();

					var mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = Math.random() * 400 - 200;
					mesh.position.y = Math.random() * 400 - 200;
					mesh.position.z = Math.random() * 400 - 200;
					mesh.rotation.x = Math.random();
					mesh.rotation.y = Math.random();
					mesh.rotation.z = Math.random();

					mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 10 + 1;
					group.add( mesh );

				}

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

				// Init postprocessing
				initPostprocessing();

				// Init gui
				var gui = new dat.GUI();
				gui.add( postprocessing, 'enabled' );

				gui.add( postprocessing, 'onlyAO', false ).onChange( function( value ) { ssaoPass.onlyAO = value; } );
				gui.add( postprocessing, 'radius' ).min( 0 ).max( 64 ).onChange( function( value ) { ssaoPass.radius = value; } );
				gui.add( postprocessing, 'aoClamp' ).min( 0 ).max( 1 ).onChange( function( value ) { ssaoPass.aoClamp = value; } );
				gui.add( postprocessing, 'lumInfluence' ).min( 0 ).max( 1 ).onChange( function( value ) { ssaoPass.lumInfluence = value; } );

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

				onWindowResize();

			}


			function onWindowResize() {

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

				camera.aspect = width / height;
				camera.updateProjectionMatrix();
				renderer.setSize( width, height );

				// Resize renderTargets
				ssaoPass.setSize( width, height );

				var pixelRatio = renderer.getPixelRatio();
				var newWidth  = Math.floor( width / pixelRatio ) || 1;
				var newHeight = Math.floor( height / pixelRatio ) || 1;
				effectComposer.setSize( newWidth, newHeight );

			}

			function initPostprocessing() {

				// Setup render pass
				var renderPass = new THREE.RenderPass( scene, camera );

				// Setup SSAO pass
				ssaoPass = new THREE.SSAOPass( scene, camera );
				ssaoPass.renderToScreen = true;

				// Add pass to effect composer
				effectComposer = new THREE.EffectComposer( renderer );
				effectComposer.addPass( renderPass );
				effectComposer.addPass( ssaoPass );

			}

			function animate() {

				requestAnimationFrame( animate );

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

			}

			function render() {

				var timer = performance.now();
				group.rotation.x = timer * 0.0002;
				group.rotation.y = timer * 0.0001;

				if ( postprocessing.enabled ) {

					effectComposer.render();

				} else {

					renderer.render( scene, camera );

				}

			}

		</script>
	</body>
</html>