javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
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							<!doctype html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>three.js webgl - custom attributes</title>
		<style>
			body {
				color: #ffffff;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
				font-weight: bold;

				background-color: #000000;
				margin: 0px;
				overflow: hidden;
			}
			#info {
				color: #fff;
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
				z-index:100;
			}
			
		</style>
	</head>

	<body>
		<div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - custom attributes example</div>
		<div id="container"></div>

		<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
		<script type="text/javascript" src="js/Stats.js"></script>

		<script src="../build/Three.js"></script>


		<script type="x-shader/x-vertex" id="vertexshader">

			uniform float amplitude;

			attribute float displacement;

			varying vec3 vNormal;
			varying vec2 vUv;
			
			void main() {

				vNormal = normal;	
				vUv = ( 0.5 + amplitude ) * uv + vec2( amplitude );

				vec3 newPosition = position + amplitude * normal * vec3( displacement );
				gl_Position = projectionMatrix * modelViewMatrix * vec4( newPosition, 1.0 );

			}

		</script>
	
		<script type="x-shader/x-fragment" id="fragmentshader">
	
			varying vec3 vNormal;
			varying vec2 vUv;
			
			uniform vec3 color;
			uniform sampler2D texture;

			void main() {

				vec3 light = vec3( 0.5, 0.2, 1.0 );
				light = normalize( light );
			
				float dProd = dot( vNormal, light ) * 0.5 + 0.5;

				vec4 tcolor = texture2D( texture, vUv );
				vec4 gray = vec4( vec3( tcolor.r * 0.3 + tcolor.g * 0.59 + tcolor.b * 0.11 ), 1.0 );
				
				gl_FragColor = gray * vec4( vec3( dProd ) * vec3( color ), 1.0 );

			}

		</script>
		
		
		<script type="text/javascript">
	
		var renderer, scene, camera, stats;

		var sphere, uniforms, attributes;

		var WIDTH = window.innerWidth,
			HEIGHT = window.innerHeight;	
		
		init();
		animate();

		function init() {

			camera = new THREE.Camera( 30, WIDTH / HEIGHT, 1, 10000 );
			camera.position.z = 300;
			
			scene = new THREE.Scene();	
		
			attributes = {

				displacement: {	type: 'f', value: [] }

			};
			
			uniforms = {
				
				amplitude: { type: "f", value: 1.0 },
				color:     { type: "c", value: new THREE.Color( 0xff2200 ) },
				texture:   { type: "t", value: 0, texture: THREE.ImageUtils.loadTexture( "textures/water.jpg" ) },

			};

			uniforms.texture.texture.wrapS = uniforms.texture.texture.wrapT = THREE.RepeatWrapping;

			var shaderMaterial = new THREE.MeshShaderMaterial( {
			
				uniforms: 		uniforms,
				attributes:     attributes,
				vertexShader:   document.getElementById( 'vertexshader' ).textContent,
				fragmentShader: document.getElementById( 'fragmentshader' ).textContent			

			});
		
		
			var radius = 50, segments = 128, rings = 64;
			var geometry = new THREE.SphereGeometry( radius, segments, rings );
			
			sphere = new THREE.Mesh( geometry, shaderMaterial );
			sphere.dynamic = true;

			var vertices = sphere.geometry.vertices;
			var values = attributes.displacement.value;

			for( var v = 0; v < vertices.length; v++ ) {

				values[ v ] = Math.random() * 5;

			}
		
			scene.addChild( sphere );
		
			renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1 } );
			renderer.setSize( WIDTH, HEIGHT );
			
			var container = document.getElementById( 'container' );
			container.appendChild( renderer.domElement );
		
			stats = new Stats();
			stats.domElement.style.position = 'absolute';
			stats.domElement.style.top = '0px';
			container.appendChild( stats.domElement );
			
		}
	
		var i, value;
	
		function animate() {

			requestAnimationFrame( animate );

			render();
			stats.update();

		}

		function render() {
		
			sphere.rotation.y += 0.01;
			sphere.rotation.z += 0.01;
			
			uniforms.amplitude.value = 2.5 * Math.sin( sphere.rotation.y * 0.125 );
			THREE.ColorUtils.adjustHSV( uniforms.color.value, 0.0005, 0, 0 );
			
			for( i = 0; i < attributes.displacement.value.length; i++ ) {

				value = attributes.displacement.value[ i ];
				value[ i ] += 0.5 * ( 0.5 - Math.random() );
				if ( value[ i ] < -5 ) value[ i ] = -5;
				if ( value[ i ] > 5 ) value[ i ] = 5;

			}
			attributes.displacement.needsUpdate = true;

			renderer.render( scene, camera );

		}


	</script>

</body>

</html>