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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js geometry - csg</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">
- <style>
- body {
- background-color: #eeeeee;
- color: #333;
- }
- a {
- color: #009688;
- text-decoration: underline;
- }
- </style>
- </head>
- <body>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> bvh csg - <a href="https://github.com/gkjohnson/three-bvh-csg" target="_blank" rel="noopener">three-bvh-csg</a><br/>
- See <a href="https://github.com/gkjohnson/three-bvh-csg" target="_blank" rel="noopener">main project repository</a> for more information and examples on constructive solid geometry.
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/",
- "three-mesh-bvh": "https://cdn.jsdelivr.net/npm/three-mesh-bvh@0.7.3/build/index.module.js",
- "three-bvh-csg": "https://cdn.jsdelivr.net/npm/three-bvh-csg@0.0.16/build/index.module.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import Stats from 'three/addons/libs/stats.module.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { SUBTRACTION, INTERSECTION, ADDITION, Brush, Evaluator } from 'three-bvh-csg';
- let stats;
- let camera, scene, renderer;
- let baseBrush, brush;
- let core;
- let result, evaluator, wireframe;
- const params = {
- operation: SUBTRACTION,
- useGroups: true,
- wireframe: false,
- };
- init();
- function init() {
- // environment
- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 100 );
- camera.position.set( - 1, 1, 1 ).normalize().multiplyScalar( 10 );
- scene = new THREE.Scene();
- scene.background = new THREE.Color( 0xfce4ec );
- // lights
- const ambient = new THREE.HemisphereLight( 0xffffff, 0xbfd4d2, 3 );
- scene.add( ambient );
- const directionalLight = new THREE.DirectionalLight( 0xffffff, 0.3 );
- directionalLight.position.set( 1, 4, 3 ).multiplyScalar( 3 );
- directionalLight.castShadow = true;
- directionalLight.shadow.mapSize.setScalar( 2048 );
- directionalLight.shadow.bias = - 1e-4;
- directionalLight.shadow.normalBias = 1e-4;
- scene.add( directionalLight );
- // renderer
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- renderer.shadowMap.enabled = true;
- renderer.shadowMap.type = THREE.PCFSoftShadowMap;
- document.body.appendChild( renderer.domElement );
- stats = new Stats();
- document.body.appendChild( stats.dom );
- // add shadow plane
- const plane = new THREE.Mesh(
- new THREE.PlaneGeometry(),
- new THREE.ShadowMaterial( {
- color: 0xd81b60,
- transparent: true,
- opacity: 0.075,
- side: THREE.DoubleSide,
- } ),
- );
- plane.position.y = - 3;
- plane.rotation.x = - Math.PI / 2;
- plane.scale.setScalar( 10 );
- plane.receiveShadow = true;
- scene.add( plane );
- // create brushes
- evaluator = new Evaluator();
- baseBrush = new Brush(
- new THREE.IcosahedronGeometry( 2, 3 ),
- new THREE.MeshStandardMaterial( {
- flatShading: true,
- polygonOffset: true,
- polygonOffsetUnits: 1,
- polygonOffsetFactor: 1,
- } ),
- );
- brush = new Brush(
- new THREE.CylinderGeometry( 1, 1, 5, 45 ),
- new THREE.MeshStandardMaterial( {
- color: 0x80cbc4,
- polygonOffset: true,
- polygonOffsetUnits: 1,
- polygonOffsetFactor: 1,
- } ),
- );
- core = new Brush(
- new THREE.IcosahedronGeometry( 0.15, 1 ),
- new THREE.MeshStandardMaterial( {
- flatShading: true,
- color: 0xff9800,
- emissive: 0xff9800,
- emissiveIntensity: 0.35,
- polygonOffset: true,
- polygonOffsetUnits: 1,
- polygonOffsetFactor: 1,
- } ),
- );
- core.castShadow = true;
- scene.add( core );
- // create wireframe
- wireframe = new THREE.Mesh(
- undefined,
- new THREE.MeshBasicMaterial( { color: 0x009688, wireframe: true } ),
- );
- scene.add( wireframe );
- // controls
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 5;
- controls.maxDistance = 75;
- // set up gui
- const gui = new GUI();
- gui.add( params, 'operation', { SUBTRACTION, INTERSECTION, ADDITION } );
- gui.add( params, 'wireframe' );
- gui.add( params, 'useGroups' );
- window.addEventListener( 'resize', onWindowResize );
- onWindowResize();
- }
- function updateCSG() {
- evaluator.useGroups = params.useGroups;
- result = evaluator.evaluate( baseBrush, brush, params.operation, result );
- result.castShadow = true;
- result.receiveShadow = true;
- scene.add( result );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- // update the transforms
- const t = window.performance.now() + 9000;
- baseBrush.rotation.x = t * 0.0001;
- baseBrush.rotation.y = t * 0.00025;
- baseBrush.rotation.z = t * 0.0005;
- baseBrush.updateMatrixWorld();
- brush.rotation.x = t * - 0.0002;
- brush.rotation.y = t * - 0.0005;
- brush.rotation.z = t * - 0.001;
- const s = 0.5 + 0.5 * ( 1 + Math.sin( t * 0.001 ) );
- brush.scale.set( s, 1, s );
- brush.updateMatrixWorld();
- // update the csg
- updateCSG();
- wireframe.geometry = result.geometry;
- wireframe.visible = params.wireframe;
- renderer.render( scene, camera );
- stats.update();
- }
- </script>
- </body>
- </html>
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