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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - buffer geometry constructed from geometry</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;
- background-color: #000000;
- margin: 0px;
- overflow: hidden;
- }
- #info {
- position: absolute;
- top: 0px;
- width: 100%;
- padding: 5px;
- font-family: Monospace;
- font-size: 13px;
- text-align: center;
- }
- a {
- color: #0080ff;
- }
- </style>
- <script type="text/javascript" src="../build/three.js"></script>
- <script type="text/javascript" src="js/Detector.js"></script>
- <script type="text/javascript" src="js/libs/stats.min.js"></script>
- <script type="text/javascript" src="js/controls/TrackballControls.js"></script>
- </head>
- <body>
- <div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - buffer geometry constructed from geometry - (<a target="_blank" href="http://callum.com">author</a>)</div>
- <script>
- if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
- var camera, scene, renderer, controls, stats;
- init();
- animate();
- function init() {
- renderer = new THREE.WebGLRenderer( {
- antialias: true
- } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 45.0, window.innerWidth / window.innerHeight, 100, 1500.0 );
- camera.position.z = 480.0;
- scene.add( new THREE.AmbientLight( 0x444444 ) );
- var light1 = new THREE.DirectionalLight( 0x999999, 0.1 );
- light1.position.set( 1, 1, 1 );
- scene.add( light1 );
- var light2 = new THREE.DirectionalLight( 0x999999, 1.5 );
- light2.position.set( 0, -1, 0 );
- scene.add( light2 );
- controls = new THREE.TrackballControls( camera, renderer.domElement );
- controls.minDistance = 100.0;
- controls.maxDistance = 800.0;
- controls.dynamicDampingFactor = 0.1;
- stats = new Stats();
- document.body.appendChild( stats.dom );
- window.addEventListener( 'resize', onWindowResize, false );
- createScene();
- }
- function createGeometry() {
- var heartShape = new THREE.Shape(); // From http://blog.burlock.org/html5/130-paths
- var x = 0, y = 0;
- heartShape.moveTo( x + 25, y + 25 );
- heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
- heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35, x - 30, y + 35 );
- heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
- heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
- heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
- heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
- var extrudeSettings = {
- amount: 16,
- bevelEnabled: true,
- bevelSegments: 1,
- steps: 2,
- bevelSize: 1,
- bevelThickness: 1
- };
- var geometry = new THREE.ExtrudeGeometry( heartShape, extrudeSettings );
- geometry.rotateX( Math.PI );
- geometry.scale( 0.4, 0.4, 0.4 );
- return geometry;
- }
- function createScene() {
- var bufferGeometry = new THREE.BufferGeometry();
- var radius = 125;
- var count = 80;
- var positions = [];
- var normals = [];
- var colors = [];
- var spherical = new THREE.Spherical();
- var vector = new THREE.Vector3();
- for ( var i = 1, l = count; i <= l; i ++ ) {
- var phi = Math.acos( -1 + ( 2 * i ) / l );
- var theta = Math.sqrt( l * Math.PI ) * phi;
- spherical.set( radius, phi, theta );
- vector.setFromSpherical( spherical );
- var geometry = createGeometry();
- geometry.lookAt( vector );
- geometry.translate( vector.x, vector.y, vector.z );
- var color = new THREE.Color( 0xffffff );
- color.setHSL( ( i / l ), 1.0, 0.7 );
- geometry.faces.forEach( function ( face, index ) {
- positions.push( geometry.vertices[ face.a ].x );
- positions.push( geometry.vertices[ face.a ].y );
- positions.push( geometry.vertices[ face.a ].z );
- positions.push( geometry.vertices[ face.b ].x );
- positions.push( geometry.vertices[ face.b ].y );
- positions.push( geometry.vertices[ face.b ].z );
- positions.push( geometry.vertices[ face.c ].x );
- positions.push( geometry.vertices[ face.c ].y );
- positions.push( geometry.vertices[ face.c ].z );
- normals.push( face.normal.x );
- normals.push( face.normal.y );
- normals.push( face.normal.z );
- normals.push( face.normal.x );
- normals.push( face.normal.y );
- normals.push( face.normal.z );
- normals.push( face.normal.x );
- normals.push( face.normal.y );
- normals.push( face.normal.z );
- colors.push( color.r );
- colors.push( color.g );
- colors.push( color.b );
- colors.push( color.r );
- colors.push( color.g );
- colors.push( color.b );
- colors.push( color.r );
- colors.push( color.g );
- colors.push( color.b );
- } );
- }
- bufferGeometry.addAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
- bufferGeometry.addAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
- bufferGeometry.addAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
- var material = new THREE.MeshPhongMaterial( {
- shininess: 80,
- vertexColors: THREE.VertexColors
- } );
- var mesh = new THREE.Mesh( bufferGeometry, material );
- scene.add( mesh );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate( time ) {
- requestAnimationFrame( animate );
- controls.update();
- stats.update();
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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