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202 lines
4.6 KiB
202 lines
4.6 KiB
2 years ago
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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 - geometry - extrude shapes</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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<style>
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body {
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background-color: #222;
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}
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a {
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color: #f80;
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}
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</style>
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</head>
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<body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { TrackballControls } from 'three/addons/controls/TrackballControls.js';
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let camera, scene, renderer, controls;
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init();
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animate();
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function init() {
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const info = document.createElement( 'div' );
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info.style.position = 'absolute';
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info.style.top = '10px';
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info.style.width = '100%';
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info.style.textAlign = 'center';
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info.style.color = '#fff';
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info.style.link = '#f80';
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info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - geometry extrude shapes';
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document.body.appendChild( info );
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renderer = new THREE.WebGLRenderer();
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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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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x222222 );
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 0, 500 );
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controls = new TrackballControls( camera, renderer.domElement );
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controls.minDistance = 200;
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controls.maxDistance = 500;
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scene.add( new THREE.AmbientLight( 0x222222 ) );
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const light = new THREE.PointLight( 0xffffff );
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light.position.copy( camera.position );
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scene.add( light );
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//
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const closedSpline = new THREE.CatmullRomCurve3( [
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new THREE.Vector3( - 60, - 100, 60 ),
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new THREE.Vector3( - 60, 20, 60 ),
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new THREE.Vector3( - 60, 120, 60 ),
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new THREE.Vector3( 60, 20, - 60 ),
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new THREE.Vector3( 60, - 100, - 60 )
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] );
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closedSpline.curveType = 'catmullrom';
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closedSpline.closed = true;
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const extrudeSettings1 = {
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steps: 100,
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bevelEnabled: false,
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extrudePath: closedSpline
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};
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const pts1 = [], count = 3;
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for ( let i = 0; i < count; i ++ ) {
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const l = 20;
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const a = 2 * i / count * Math.PI;
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pts1.push( new THREE.Vector2( Math.cos( a ) * l, Math.sin( a ) * l ) );
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}
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const shape1 = new THREE.Shape( pts1 );
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const geometry1 = new THREE.ExtrudeGeometry( shape1, extrudeSettings1 );
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const material1 = new THREE.MeshLambertMaterial( { color: 0xb00000, wireframe: false } );
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const mesh1 = new THREE.Mesh( geometry1, material1 );
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scene.add( mesh1 );
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//
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const randomPoints = [];
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for ( let i = 0; i < 10; i ++ ) {
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randomPoints.push( new THREE.Vector3( ( i - 4.5 ) * 50, THREE.MathUtils.randFloat( - 50, 50 ), THREE.MathUtils.randFloat( - 50, 50 ) ) );
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}
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const randomSpline = new THREE.CatmullRomCurve3( randomPoints );
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//
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const extrudeSettings2 = {
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steps: 200,
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bevelEnabled: false,
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extrudePath: randomSpline
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};
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const pts2 = [], numPts = 5;
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for ( let i = 0; i < numPts * 2; i ++ ) {
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const l = i % 2 == 1 ? 10 : 20;
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const a = i / numPts * Math.PI;
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pts2.push( new THREE.Vector2( Math.cos( a ) * l, Math.sin( a ) * l ) );
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}
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const shape2 = new THREE.Shape( pts2 );
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const geometry2 = new THREE.ExtrudeGeometry( shape2, extrudeSettings2 );
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const material2 = new THREE.MeshLambertMaterial( { color: 0xff8000, wireframe: false } );
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const mesh2 = new THREE.Mesh( geometry2, material2 );
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scene.add( mesh2 );
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//
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const materials = [ material1, material2 ];
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const extrudeSettings3 = {
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depth: 20,
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steps: 1,
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bevelEnabled: true,
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bevelThickness: 2,
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bevelSize: 4,
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bevelSegments: 1
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};
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const geometry3 = new THREE.ExtrudeGeometry( shape2, extrudeSettings3 );
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const mesh3 = new THREE.Mesh( geometry3, materials );
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mesh3.position.set( 50, 100, 50 );
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scene.add( mesh3 );
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}
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function animate() {
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requestAnimationFrame( animate );
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controls.update();
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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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