javascript
/
three.js
kopia lustrzana https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webvr - Lorenz attractor</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
		<!-- Origin Trial Token, feature = WebVR (For Chrome M62+), origin = https://threejs.org, expires = 2018-06-19 -->
		<meta http-equiv="origin-trial" data-feature="WebVR (For Chrome M62+)" data-expires="2018-06-19" content="Alxt96tYGgIr9l6EXU0eeI360zcmzOY6Kuo3kcTfBGIRDOQbgFIZKRQ1joExQ74WZr1einsE+cUMHgSclNHCQQ4AAABQeyJvcmlnaW4iOiJodHRwczovL3RocmVlanMub3JnOjQ0MyIsImZlYXR1cmUiOiJXZWJWUjEuMU02MiIsImV4cGlyeSI6MTUyOTM5NzgyOH0=">
		<!-- Origin Trial Token, feature = WebXR Device API, origin = https://threejs.org, expires = 2018-06-15 -->
		<meta http-equiv="origin-trial" data-feature="WebXR Device API" data-expires="2018-06-15" content="AtJH9g6nn0B87bnjJt+9m1joZXEYDmLSlRvtMr5qJD52hMcm3S86S7jg5I7y2I5cgQglE0rzsXzti5DECQLb8QkAAABQeyJvcmlnaW4iOiJodHRwczovL3RocmVlanMub3JnOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZSIsImV4cGlyeSI6MTUyOTA4NDY2OH0=">
		<!-- Origin Trial Token, feature = WebXR Gamepad Support, origin = https://threejs.org, expires = 2018-06-15 -->
		<meta http-equiv="origin-trial" data-feature="WebXR Gamepad Support" data-expires="2018-06-15" content="Aihhr0yXkVlCKF0DIpTbH8WX7ZmEexUhI/95+t8aoLfvBkePMiZ/iOoDPU3xefyfuczkDahH1L6eiPvRsuzITAAAAABYeyJvcmlnaW4iOiJodHRwczovL3RocmVlanMub3JnOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkdhbWVwYWRTdXBwb3J0IiwiZXhwaXJ5IjoxNTI5MDg0NjY4fQ==">
		<style>
			body {
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

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

		<script src="js/vr/WebVR.js"></script>

		<script>

			var camera, scene, renderer, x, y, z, c, geometry;

			var scale = .015; // for reducing overall displayed size
			var multiplier = 5; // integer, increase for faster visualization

			var steps = 100000;
			var current = 1;
			var shown = 10000;

			var beta = 8 / 3;
			var rho = 28;
			var sigma = 10;

			var dt = .005;

			init();
			animate();

			function move() {

				geometry.attributes.position.array.copyWithin( 3 );
				geometry.attributes.color.array.copyWithin( 3 );

				if ( current < steps ) {

					var dx = sigma * ( y - x ) * dt;
					var dy = ( x * ( rho - z ) - y ) * dt;
					var dz = ( x * y - beta * z ) * dt;

					x += dx;
					y += dy;
					z += dz;

					geometry.attributes.position.set( [ scale * x, scale * y, scale * z ], 0 );

					c.setHSL( current / steps, 1, .5 );
					geometry.attributes.color.set( [ c.r, c.g, c.b ], 0 );

				}

				if ( current < steps + shown ) {

					current ++;

				} else {

					current = 0;

				}

			}

			function init() {

				scene = new THREE.Scene();
				scene.position.set( 0, 1.5, - 1 );

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 2 );
				camera.lookAt( 0, 1.5, - 1 );

				//

				x = 15 * Math.random();
				y = 15 * Math.random();
				z = 15 * Math.random();

				c = new THREE.Color();

				geometry = new THREE.BufferGeometry();

				var positions = new Float32Array( 3 * shown );
				for ( var i = 0; i < positions.length; i += 3 ) {

					positions.set( [ scale * x, scale * y, scale * z ], i );

				}
				geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );

				var colors = new Float32Array( 3 * shown );
				for ( var i = 0; i < positions.length; i += 3 ) {

					colors.set( [ 1, 0, 0 ], i );

				}
				geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3 ) );

				var material = new THREE.LineBasicMaterial( { vertexColors: THREE.VertexColors } );

				var line = new THREE.Line( geometry, material );
				line.frustumCulled = false; // critical to avoid blackouts!
				scene.add( line );

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.autoClear = false;
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.shadowMap.enabled = true;
				renderer.vr.enabled = true;
				document.body.appendChild( renderer.domElement );

				document.body.appendChild( WEBVR.createButton( renderer ) );

				//

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

			}

			function onWindowResize() {

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

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

			}

			function animate() {

				renderer.setAnimationLoop( render );

			}

			function render() {

				scene.rotation.z += .001;

				for ( var i = 0; i < multiplier; i ++ ) {

					move();

				}

				geometry.attributes.position.needsUpdate = true;
				geometry.attributes.color.needsUpdate = true;

				renderer.render( scene, camera );

			}

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