javascript
/
three.js
zrkadlo https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - lines - colors</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;
			}

			a {
				color:#0078ff;
			}

			#info {
				position: absolute;
				top: 10px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: center;
				z-index:100;
			}

			a {
				color: orange;
				text-decoration: none;
			}

			a:hover {
				color: #0080ff;
			}

		</style>
	</head>
	<body>

		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - colors WebGL demo
			[<a href="http://en.wikipedia.org/wiki/Hilbert_curve">Hilbert curve</a> thanks to <a href="http://www.openprocessing.org/visuals/?visualID=15599">Thomas Diewald</a>]
		</div>

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

		<script src="js/geometries/hilbert3D.js"></script>

		<script src="js/Detector.js"></script>

		<script>

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

			var mouseX = 0, mouseY = 0,

			windowHalfX = window.innerWidth / 2,
			windowHalfY = window.innerHeight / 2,

			camera, scene, renderer, material;

			init();
			animate();

			function init() {

				var i, container;

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

				camera = new THREE.PerspectiveCamera( 33, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.appendChild( renderer.domElement );

				var hilbertPoints = hilbert3D( new THREE.Vector3( 0,0,0 ), 200.0, 1, 0, 1, 2, 3, 4, 5, 6, 7 );

				// Colors with BufferGeometry

				var buffGeometry0 = new THREE.BufferGeometry(),
					buffGeometry1 = new THREE.BufferGeometry(),
					buffGeometry2 = new THREE.BufferGeometry();

				var subdivisions = 6;

				var position = [],
					colorArray0 = [],
					colorArray1 = [],
					colorArray2 = [];

				var point = new THREE.Vector3();
				var color = new THREE.Color();

				var spline = new THREE.CatmullRomCurve3( hilbertPoints );

				for ( i = 0; i < hilbertPoints.length * subdivisions; i++ ) {

					var t = i / ( hilbertPoints.length * subdivisions );
					spline.getPoint( t, point );

					position.push( point.x, point.y, point.z );

					color.setHSL( 0.6, 1.0, Math.max( 0, - point.x / 200 ) + 0.5 );
					colorArray0.push( color.r, color.g, color.b );

					color.setHSL( 0.9, 1.0, Math.max( 0, - point.y / 200 ) + 0.5 );
					colorArray1.push( color.r, color.g, color.b );

					color.setHSL( i / ( hilbertPoints.length * subdivisions ), 1.0, 0.5 );
					colorArray2.push( color.r, color.g, color.b );

				}

				buffGeometry0.addAttribute( 'position', new THREE.Float32BufferAttribute( position, 3 ) );
				buffGeometry1.addAttribute( 'position', new THREE.Float32BufferAttribute( position, 3 ) );
				buffGeometry2.addAttribute( 'position', new THREE.Float32BufferAttribute( position, 3 ) );

				buffGeometry0.addAttribute( 'color', new THREE.Float32BufferAttribute( colorArray0, 3 ) );
				buffGeometry1.addAttribute( 'color', new THREE.Float32BufferAttribute( colorArray1, 3 ) );
				buffGeometry2.addAttribute( 'color', new THREE.Float32BufferAttribute( colorArray2, 3 ) );

				// Colors with Geometry

				var geometry0 = new THREE.Geometry(),
					geometry2 = new THREE.Geometry(),
					geometry3 = new THREE.Geometry();

				var colors0 = [],
					colors1 = [],
					colors2 = [];

				for ( i = 0; i < hilbertPoints.length; i++ ) {

					geometry0.vertices.push( hilbertPoints[ i ] );

					colors0[ i ] = new THREE.Color( 0xffffff );
					colors0[ i ].setHSL( 0.6, 1.0, Math.max( 0, ( 200 - hilbertPoints[ i ].x ) / 400 ) * 0.5 + 0.5 );

					colors1[ i ] = new THREE.Color( 0xffffff );
					colors1[ i ].setHSL( 0.3, 1.0, Math.max( 0, ( 200 + hilbertPoints[ i ].x ) / 400 ) * 0.5 );

					colors2[ i ] = new THREE.Color( 0xffffff );
					colors2[ i ].setHSL( i / hilbertPoints.length, 1.0, 0.5 );

				}

				geometry2.vertices = geometry3.vertices = geometry0.vertices;

				geometry0.colors = colors0;
				geometry2.colors = colors1;
				geometry3.colors = colors2;

				// Create lines and add to scene

				material = new THREE.LineBasicMaterial( { color: 0xffffff, opacity: 1, linewidth: 3, vertexColors: THREE.VertexColors } );

				var line, p, scale = 0.3, d = 225;
				var parameters =  [
					[ material, scale * 1.5, [ - d, - d / 2, 0 ], buffGeometry0 ],
					[ material, scale * 1.5, [   0, - d / 2, 0 ], buffGeometry1 ],
					[ material, scale * 1.5, [   d, - d / 2, 0 ], buffGeometry2 ],

					[ material, scale * 1.5, [ - d, d / 2, 0 ], geometry0 ],
					[ material, scale * 1.5, [   0, d / 2, 0 ], geometry2 ],
					[ material, scale * 1.5, [   d, d / 2, 0 ], geometry3 ],
				];

				for ( i = 0; i < parameters.length; i++ ) {

					p = parameters[ i ];
					line = new THREE.Line( p[ 3 ],  p[ 0 ] );
					line.scale.x = line.scale.y = line.scale.z =  p[ 1 ];
					line.position.x = p[ 2 ][ 0 ];
					line.position.y = p[ 2 ][ 1 ];
					line.position.z = p[ 2 ][ 2 ];
					scene.add( line );

				}

				// Input Event Listeners

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );

				// Resize Event Listener

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

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

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

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

			}

			//

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;
			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length > 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}

			}

			//

			function animate() {

				requestAnimationFrame( animate );
				render();

			}

			function render() {

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY + 200 - camera.position.y ) * .05;

				camera.lookAt( scene.position );

				var time = Date.now() * 0.0005;

				for ( var i = 0; i < scene.children.length; i ++ ) {

					var object = scene.children[ i ];

					if ( object instanceof THREE.Line ) {

						object.rotation.y = time * ( i % 2 ? 1 : -1 );

					}

				}

				renderer.render( scene, camera );

			}

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