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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 - buffer geometry constructed from geometry</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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- <link type="text/css" rel="stylesheet" href="main.css">
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- </head>
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- <body>
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- <div id="info">
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- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - buffergeometry constructed from geometry<br/>
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- by <a target="_blank" href="http://callum.com">Callum Prentice</a>
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- </div>
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-
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- <script type="module">
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-
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- import * as THREE from '../build/three.module.js';
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-
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- import Stats from './jsm/libs/stats.module.js';
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-
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- import { TrackballControls } from './jsm/controls/TrackballControls.js';
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-
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- let camera, scene, renderer, controls, stats;
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-
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- init();
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- animate();
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-
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- function init() {
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-
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- renderer = new THREE.WebGLRenderer( { antialias: true } );
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- renderer.setPixelRatio( window.devicePixelRatio );
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- renderer.setSize( window.innerWidth, window.innerHeight );
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- document.body.appendChild( renderer.domElement );
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-
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- scene = new THREE.Scene();
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-
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- camera = new THREE.PerspectiveCamera( 45.0, window.innerWidth / window.innerHeight, 100, 1500.0 );
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- camera.position.z = 480.0;
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- scene.add( camera );
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-
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- controls = new TrackballControls( camera, renderer.domElement );
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- controls.minDistance = 100.0;
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- controls.maxDistance = 800.0;
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- controls.dynamicDampingFactor = 0.1;
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-
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- scene.add( new THREE.AmbientLight( 0xffffff, 0.2 ) );
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-
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- const light = new THREE.PointLight( 0xffffff, 0.7 );
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- camera.add( light );
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-
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- createScene();
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-
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- stats = new Stats();
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- document.body.appendChild( stats.dom );
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-
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- window.addEventListener( 'resize', onWindowResize, false );
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-
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- }
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-
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- function createGeometry() {
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-
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- const heartShape = new THREE.Shape(); // From http://blog.burlock.org/html5/130-paths
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- const x = 0, y = 0;
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-
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- heartShape.moveTo( x + 25, y + 25 );
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- heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
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- heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35, x - 30, y + 35 );
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- heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
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- heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
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- heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
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- heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
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-
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- const extrudeSettings = {
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- depth: 16,
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- bevelEnabled: true,
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- bevelSegments: 1,
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- steps: 2,
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- bevelSize: 1,
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- bevelThickness: 1
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- };
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-
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- const geometry = new THREE.ExtrudeGeometry( heartShape, extrudeSettings );
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- geometry.rotateX( Math.PI );
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- geometry.scale( 0.4, 0.4, 0.4 );
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-
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- return geometry;
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-
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- }
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-
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- function createScene() {
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-
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- const bufferGeometry = new THREE.BufferGeometry();
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-
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- const radius = 125;
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- const count = 80;
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-
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- const positions = [];
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- const normals = [];
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- const colors = [];
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-
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- const vector = new THREE.Vector3();
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-
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- const color = new THREE.Color( 0xffffff );
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- const heartGeometry = createGeometry();
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- const geometry = new THREE.Geometry();
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-
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- for ( let i = 1, l = count; i <= l; i ++ ) {
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-
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- const phi = Math.acos( - 1 + ( 2 * i ) / l );
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- const theta = Math.sqrt( l * Math.PI ) * phi;
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-
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- vector.setFromSphericalCoords( radius, phi, theta );
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-
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- geometry.copy( heartGeometry );
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- geometry.lookAt( vector );
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- geometry.translate( vector.x, vector.y, vector.z );
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-
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- color.setHSL( ( i / l ), 1.0, 0.7 );
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-
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- geometry.faces.forEach( function ( face ) {
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-
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- positions.push( geometry.vertices[ face.a ].x );
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- positions.push( geometry.vertices[ face.a ].y );
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- positions.push( geometry.vertices[ face.a ].z );
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- positions.push( geometry.vertices[ face.b ].x );
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- positions.push( geometry.vertices[ face.b ].y );
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- positions.push( geometry.vertices[ face.b ].z );
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- positions.push( geometry.vertices[ face.c ].x );
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- positions.push( geometry.vertices[ face.c ].y );
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- positions.push( geometry.vertices[ face.c ].z );
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-
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- normals.push( face.normal.x );
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- normals.push( face.normal.y );
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- normals.push( face.normal.z );
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- normals.push( face.normal.x );
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- normals.push( face.normal.y );
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- normals.push( face.normal.z );
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- normals.push( face.normal.x );
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- normals.push( face.normal.y );
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- normals.push( face.normal.z );
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-
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- colors.push( color.r );
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- colors.push( color.g );
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- colors.push( color.b );
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- colors.push( color.r );
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- colors.push( color.g );
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- colors.push( color.b );
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- colors.push( color.r );
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- colors.push( color.g );
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- colors.push( color.b );
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-
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- } );
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-
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- }
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-
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- bufferGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
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- bufferGeometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
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- bufferGeometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
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-
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- const material = new THREE.MeshPhongMaterial( { shininess: 80, vertexColors: true } );
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-
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- const mesh = new THREE.Mesh( bufferGeometry, material );
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- scene.add( mesh );
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-
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- }
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-
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- function onWindowResize() {
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-
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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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-
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- function animate() {
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-
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- requestAnimationFrame( animate );
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-
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- controls.update();
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- stats.update();
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-
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- renderer.render( scene, camera );
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-
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- }
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-
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- </script>
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- </body>
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-</html>
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Mr.doob
