mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-16 19:17:57 +01:00
174 lines
3.5 KiB
HTML
174 lines
3.5 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - buffergeometry [particles]</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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color: #cccccc;
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font-family:Monospace;
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font-size:13px;
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text-align:center;
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background-color: #050505;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px; width: 100%;
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padding: 5px;
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}
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a {
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color: #0080ff;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry - particles</div>
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<script src="../build/three.min.js"></script>
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<script src="js/Detector.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script>
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if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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var container, stats;
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var camera, scene, renderer;
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var mesh;
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init();
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animate();
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function init() {
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container = document.getElementById( 'container' );
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//
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camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 5, 3500 );
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camera.position.z = 2750;
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scene = new THREE.Scene();
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scene.fog = new THREE.Fog( 0x050505, 2000, 3500 );
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//
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var particles = 500000;
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var geometry = new THREE.BufferGeometry();
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var positions = new Float32Array( particles * 3 );
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var colors = new Float32Array( particles * 3 );
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var color = new THREE.Color();
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var n = 1000, n2 = n / 2; // particles spread in the cube
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for ( var i = 0; i < positions.length; i += 3 ) {
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// positions
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var x = Math.random() * n - n2;
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var y = Math.random() * n - n2;
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var z = Math.random() * n - n2;
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positions[ i ] = x;
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positions[ i + 1 ] = y;
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positions[ i + 2 ] = z;
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// colors
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var vx = ( x / n ) + 0.5;
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var vy = ( y / n ) + 0.5;
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var vz = ( z / n ) + 0.5;
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color.setRGB( vx, vy, vz );
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colors[ i ] = color.r;
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colors[ i + 1 ] = color.g;
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colors[ i + 2 ] = color.b;
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}
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geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
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geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3 ) );
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geometry.computeBoundingSphere();
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//
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var material = new THREE.PointCloudMaterial( { size: 15, vertexColors: THREE.VertexColors } );
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particleSystem = new THREE.PointCloud( geometry, material );
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scene.add( particleSystem );
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//
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renderer = new THREE.WebGLRenderer( { antialias: false } );
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renderer.setClearColor( scene.fog.color );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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//
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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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container.appendChild( stats.domElement );
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//
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window.addEventListener( 'resize', onWindowResize, false );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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var time = Date.now() * 0.001;
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particleSystem.rotation.x = time * 0.25;
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particleSystem.rotation.y = time * 0.5;
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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