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


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - dashed 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://threejs.org" target="_blank">three.js</a> - dashed lines example</div>
		<div id="container"></div>

		<script src="js/Detector.js"></script>
		<script src="js/libs/stats.min.js"></script>

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


		<script>

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

			var renderer, scene, camera, stats;
			var objects = [];


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

			init();
			animate();

			function init() {

				camera = new THREE.PerspectiveCamera( 60, WIDTH / HEIGHT, 1, 200 );
				camera.position.z = 150;

				scene = new THREE.Scene();

				scene.fog = new THREE.Fog( 0x111111, 150, 200 );

				root = new THREE.Object3D();

				var subdivisions = 6;
				var recursion = 1;

				var points = hilbert3D( new THREE.Vector3( 0,0,0 ), 25.0, recursion, 0, 1, 2, 3, 4, 5, 6, 7 );

				var spline = new THREE.Spline( points );
				var geometrySpline = new THREE.Geometry();

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

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

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

				}

				var geometryCube = cube( 50 );

				geometryCube.computeLineDistances();
				geometrySpline.computeLineDistances();

				var object = new THREE.Line( geometrySpline, new THREE.LineDashedMaterial( { color: 0xffffff, dashSize: 1, gapSize: 0.5 } ), THREE.LineStrip );

				objects.push( object );
				scene.add( object );

				var object = new THREE.Line( geometryCube, new THREE.LineDashedMaterial( { color: 0xffaa00, dashSize: 3, gapSize: 1, linewidth: 2 } ), THREE.LinePieces );

				objects.push( object );
				scene.add( object );

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setClearColor( 0x111111, 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 );

				//

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

			}

			function cube( size ) {

				var h = size * 0.5;

				var geometry = new THREE.Geometry();

				geometry.vertices.push( new THREE.Vector3( -h, -h, -h ) );
				geometry.vertices.push( new THREE.Vector3( -h, h, -h ) );

				geometry.vertices.push( new THREE.Vector3( -h, h, -h ) );
				geometry.vertices.push( new THREE.Vector3( h, h, -h ) );

				geometry.vertices.push( new THREE.Vector3( h, h, -h ) );
				geometry.vertices.push( new THREE.Vector3( h, -h, -h ) );

				geometry.vertices.push( new THREE.Vector3( h, -h, -h ) );
				geometry.vertices.push( new THREE.Vector3( -h, -h, -h ) );


				geometry.vertices.push( new THREE.Vector3( -h, -h, h ) );
				geometry.vertices.push( new THREE.Vector3( -h, h, h ) );

				geometry.vertices.push( new THREE.Vector3( -h, h, h ) );
				geometry.vertices.push( new THREE.Vector3( h, h, h ) );

				geometry.vertices.push( new THREE.Vector3( h, h, h ) );
				geometry.vertices.push( new THREE.Vector3( h, -h, h ) );

				geometry.vertices.push( new THREE.Vector3( h, -h, h ) );
				geometry.vertices.push( new THREE.Vector3( -h, -h, h ) );

				geometry.vertices.push( new THREE.Vector3( -h, -h, -h ) );
				geometry.vertices.push( new THREE.Vector3( -h, -h, h ) );

				geometry.vertices.push( new THREE.Vector3( -h, h, -h ) );
				geometry.vertices.push( new THREE.Vector3( -h, h, h ) );

				geometry.vertices.push( new THREE.Vector3( h, h, -h ) );
				geometry.vertices.push( new THREE.Vector3( h, h, h ) );

				geometry.vertices.push( new THREE.Vector3( h, -h, -h ) );
				geometry.vertices.push( new THREE.Vector3( h, -h, h ) );

				return geometry;

			}

			// 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 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;

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

					var object = objects[ i ];

					//object.rotation.x = 0.25 * time * ( i%2 == 1 ? 1 : -1);
					object.rotation.x = 0.25 * time;
					object.rotation.y = 0.25 * time;

				}

				renderer.render( scene, camera );

			}

	</script>

</body>

</html>