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 - splines</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://github.com/mrdoob/three.js" target="_blank">three.js</a> - splines 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/Detector.js"></script>
		<script src="js/RequestAnimationFrame.js"></script>
		<script src="js/Stats.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, n_sub, container;

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

				camera = new THREE.Camera( 33, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 700;
				camera.useTarget = true;

				scene = new THREE.Scene();

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

				container.appendChild( renderer.domElement );

				var geometry = new THREE.Geometry(),
					geometry2 = new THREE.Geometry(),
					geometry3 = new THREE.Geometry(),
					points = hilbert3D( new THREE.Vector3( 0,0,0 ), 200.0, 1, 0, 1, 2, 3, 4, 5, 6, 7 ),
					colors = [], colors2 = [], colors3 = [];

				n_sub = 6;

				var position, index;

				var spline = new THREE.Spline( points );

				for ( i = 0; i < points.length * n_sub; i ++ ) {

					index = i / ( points.length * n_sub );
					position = spline.getPoint( index );

					geometry.vertices[ i ] = new THREE.Vertex( new THREE.Vector3( position.x, position.y, position.z ) );

					colors[ i ] = new THREE.Color( 0xffffff );
					colors[ i ].setHSV( 0.6, ( 200 + position.x ) / 400, 1.0 );

					colors2[ i ] = new THREE.Color( 0xffffff );
					//colors2[ i ].setHSV( 0.1, 1.0, ( 200 + position.x ) / 400 );
					colors2[ i ].setHSV( 0.9, ( 200 + position.y ) / 400, 1.0 );

					colors3[ i ] = new THREE.Color( 0xffffff );
					colors3[ i ].setHSV( i / ( points.length * n_sub ), 1.0, 1.0 );


				}

				geometry2.vertices = geometry3.vertices = geometry.vertices;

				geometry.colors = colors;
				geometry2.colors = colors2;
				geometry3.colors = colors3;

				// lines

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

				var line, p, scale = 0.3, d = 225,
					parameters =  [ [ material, scale*1.5, [-d,0,0],  geometry ],
									[ material, scale*1.5, [0,0,0],  geometry2 ],
									[ material, scale*1.5, [d,0,0],  geometry3 ] ];

				material.vertexColors = true;

				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 );

				}


				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				//container.appendChild(stats.domElement);


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

			}

			// port of Processing Java code by Thomas Diewald
			// http://www.openprocessing.org/visuals/?visualID=15599

			function hilbert3D( center, side, iterations, v0, v1, v2, v3, v4, v5, v6, v7 ) {

				var half = side/2,

					vec_s = [

					new THREE.Vector3( center.x - half, center.y + half, center.z - half ),
					new THREE.Vector3( center.x - half, center.y + half, center.z + half ),
					new THREE.Vector3( center.x - half, center.y - half, center.z + half ),
					new THREE.Vector3( center.x - half, center.y - half, center.z - half ),
					new THREE.Vector3( center.x + half, center.y - half, center.z - half ),
					new THREE.Vector3( center.x + half, center.y - half, center.z + half ),
					new THREE.Vector3( center.x + half, center.y + half, center.z + half ),
					new THREE.Vector3( center.x + half, center.y + half, center.z - half )

					],

					vec = [ vec_s[ v0 ], vec_s[ v1 ], vec_s[ v2 ], vec_s[ v3 ], vec_s[ v4 ], vec_s[ v5 ], vec_s[ v6 ], vec_s[ v7 ] ];

				if( --iterations >= 0 ) {

					var tmp = [];
					
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 0 ], half, iterations, v0, v3, v4, v7, v6, v5, v2, v1 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 1 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 2 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 3 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 4 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 5 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 6 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
					Array.prototype.push.apply( tmp, hilbert3D ( vec[ 7 ], half, iterations, v6, v5, v2, v1, v0, v3, v4, v7 ) );
					
					return tmp;

				}

				return vec;

			}

			//

			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;

				var time = new Date().getTime() * 0.0005;

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

					scene.objects[ i ].rotation.y = time * ( i % 2 ? 1 : -1);

				}

				renderer.render( scene, camera );

			}


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