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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - convex geometry</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - convex geometry</div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { ConvexGeometry } from 'three/addons/geometries/ConvexGeometry.js';
- import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
- let group, camera, scene, renderer;
- init();
- function init() {
- scene = new THREE.Scene();
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- // camera
- camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
- camera.position.set( 15, 20, 30 );
- scene.add( camera );
- // controls
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 20;
- controls.maxDistance = 50;
- controls.maxPolarAngle = Math.PI / 2;
- // ambient light
- scene.add( new THREE.AmbientLight( 0x666666 ) );
- // point light
- const light = new THREE.PointLight( 0xffffff, 3, 0, 0 );
- camera.add( light );
- // helper
- scene.add( new THREE.AxesHelper( 20 ) );
- // textures
- const loader = new THREE.TextureLoader();
- const texture = loader.load( 'textures/sprites/disc.png' );
- texture.colorSpace = THREE.SRGBColorSpace;
- group = new THREE.Group();
- scene.add( group );
- // points
- let dodecahedronGeometry = new THREE.DodecahedronGeometry( 10 );
- // if normal and uv attributes are not removed, mergeVertices() can't consolidate indentical vertices with different normal/uv data
- dodecahedronGeometry.deleteAttribute( 'normal' );
- dodecahedronGeometry.deleteAttribute( 'uv' );
- dodecahedronGeometry = BufferGeometryUtils.mergeVertices( dodecahedronGeometry );
- const vertices = [];
- const positionAttribute = dodecahedronGeometry.getAttribute( 'position' );
- for ( let i = 0; i < positionAttribute.count; i ++ ) {
- const vertex = new THREE.Vector3();
- vertex.fromBufferAttribute( positionAttribute, i );
- vertices.push( vertex );
- }
- const pointsMaterial = new THREE.PointsMaterial( {
- color: 0x0080ff,
- map: texture,
- size: 1,
- alphaTest: 0.5
- } );
- const pointsGeometry = new THREE.BufferGeometry().setFromPoints( vertices );
- const points = new THREE.Points( pointsGeometry, pointsMaterial );
- group.add( points );
- // convex hull
- const meshMaterial = new THREE.MeshLambertMaterial( {
- color: 0xffffff,
- opacity: 0.5,
- side: THREE.DoubleSide,
- transparent: true
- } );
- const meshGeometry = new ConvexGeometry( vertices );
- const mesh = new THREE.Mesh( meshGeometry, meshMaterial );
- group.add( mesh );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- group.rotation.y += 0.005;
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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