examples/webgl_custom_attributes_lines.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - custom attributes [lines]</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: #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 src="js/Detector.js"></script>
		<script src="js/Stats.js"></script>

		<script src="../build/three.min.js"></script>

		<script src="fonts/helvetiker_bold.typeface.js"></script>

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

			uniform float amplitude;

			attribute vec3 displacement;
			attribute vec3 customColor;

			varying vec3 vColor;

			void main() {

				vec3 newPosition = position + amplitude * displacement;

				vColor = customColor;

				gl_Position = projectionMatrix * modelViewMatrix * vec4( newPosition, 1.0 );

			}

		</script>

		<script type="x-shader/x-fragment" id="fragmentshader">

			uniform vec3 color;
			uniform float opacity;

			varying vec3 vColor;

			void main() {

				gl_FragColor = vec4( vColor * color, opacity );

			}

		</script>


		<script>

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

		var renderer, scene, camera, stats;

		var object, uniforms, attributes;

		var text = "three.js",

			height = 15,
			size = 50,

			curveSegments = 10,
			steps = 40,

			bevelThickness = 5,
			bevelSize = 1.5,
			bevelSegments = 10,
			bevelEnabled = true,

			font = "helvetiker", 		// helvetiker, optimer, gentilis, droid sans, droid serif
			weight = "bold",		// normal bold
			style = "normal";		// normal italic

		var WIDTH = window.innerWidth,
			HEIGHT = window.innerHeight;

		init();
		animate();

		function init() {

			camera = new THREE.PerspectiveCamera( 30, WIDTH / HEIGHT, 1, 10000 );
			camera.position.z = 400;

			scene = new THREE.Scene();

			attributes = {

				displacement: {	type: 'v3', value: [] },
				customColor: {	type: 'c', value: [] }

			};

			uniforms = {

				amplitude: { type: "f", value: 5.0 },
				opacity:   { type: "f", value: 0.3 },
				color:     { type: "c", value: new THREE.Color( 0xff0000 ) }

			};

			var shaderMaterial = new THREE.ShaderMaterial( {

				uniforms:       uniforms,
				attributes:     attributes,
				vertexShader:   document.getElementById( 'vertexshader' ).textContent,
				fragmentShader: document.getElementById( 'fragmentshader' ).textContent,
				blending:       THREE.AdditiveBlending,
				depthTest:      false,
				transparent:    true

			});

			shaderMaterial.linewidth = 1;

			geometry = new THREE.TextGeometry( text, {

				size: size,
				height: height,
				curveSegments: curveSegments,

				font: font,
				weight: weight,
				style: style,

				bevelThickness: bevelThickness,
				bevelSize: bevelSize,
				bevelEnabled: bevelEnabled,
				bevelSegments: bevelSegments,

				steps: steps

			});

			geometry.dynamic = true;

			THREE.GeometryUtils.center( geometry );

			object = new THREE.Line( geometry, shaderMaterial, THREE.LineStrip );

			var vertices = object.geometry.vertices;

			var displacement = attributes.displacement.value;
			var color = attributes.customColor.value;

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

				displacement[ v ] = new THREE.Vector3( 0, 0, 0 );

				color[ v ] = new THREE.Color( 0xffffff );
				color[ v ].setHSV( v / vertices.length, 0.9, 0.9 );

			}

			object.rotation.x = 0.2;

			scene.add( object );

			renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1, antialias: true } );
			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 );

			//

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

		}

		function onWindowResize() {

			camera.aspect = window.innerWidth / window.innerHeight;
			camera.updateProjectionMatrix();

			renderer.setSize( window.innerWidth, window.innerHeight );

		}

		function animate() {

			requestAnimationFrame( animate );

			render();
			stats.update();

		}

		function render() {

			var time = Date.now() * 0.001;

			object.rotation.y = 0.25 * time;

			uniforms.amplitude.value = 0.5 * Math.sin( 0.5 * time );
			THREE.ColorUtils.adjustHSV( uniforms.color.value, 0.0005, 0, 0 );

			var nx, ny, nz, value;

			for( var i = 0, il = attributes.displacement.value.length; i < il; i ++ ) {

				nx = 0.3 * ( 0.5 - Math.random() );
				ny = 0.3 * ( 0.5 - Math.random() );
				nz = 0.3 * ( 0.5 - Math.random() );

				value = attributes.displacement.value[ i ];

				value.x += nx;
				value.y += ny;
				value.z += nz;

			}

			attributes.displacement.needsUpdate = true;

			renderer.render( scene, camera );

		}


	</script>

</body>

</html>