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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 geometry - csg</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: #eeeeee;
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+ color: #333;
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+ }
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+
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+ a {
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+ color: #009688;
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+ text-decoration: underline;
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+ }
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+ </style>
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+ </head>
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+
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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> bvh csg - <a href="https://github.com/gkjohnson/three-bvh-csg" target="_blank" rel="noopener">three-bvh-csg</a><br/>
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+ 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.
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+ </div>
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+
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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/[email protected]/dist/es-module-shims.js"></script>
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+
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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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+ "three-mesh-bvh": "https://unpkg.com/three-mesh-bvh@^0.5.22/build/index.module.js",
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+ "three-bvh-csg": "https://unpkg.com/three-bvh-csg@^0.0.3/build/index.module.js"
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+ }
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+ }
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+ </script>
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+
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+ <script type="module">
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+
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+ import * as THREE from 'three';
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+ import Stats from 'three/addons/libs/stats.module.js';
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+ import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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+ import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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+ import { SUBTRACTION, INTERSECTION, ADDITION, Brush, Evaluator } from 'three-bvh-csg';
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+
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+ let stats;
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+ let camera, scene, renderer;
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+ let baseBrush, brush;
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+ let core;
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+ let result, evaluator, wireframe;
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+
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+ const params = {
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+
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+ operation: SUBTRACTION,
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+ useGroups: true,
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+ wireframe: false,
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+
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+ };
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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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+ // environment
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+ camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 100 );
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+ camera.position.set( - 1, 1, 1 ).normalize().multiplyScalar( 10 );
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+
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+ scene = new THREE.Scene();
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+ scene.background = new THREE.Color( 0xfce4ec );
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+
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+ // lights
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+ const ambient = new THREE.HemisphereLight( 0xffffff, 0xbfd4d2, 0.9 );
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+ scene.add( ambient );
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+
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+ const directionalLight = new THREE.DirectionalLight( 0xffffff, 0.1 );
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+ directionalLight.position.set( 1, 4, 3 ).multiplyScalar( 3 );
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+ directionalLight.castShadow = true;
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+ directionalLight.shadow.mapSize.setScalar( 2048 );
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+ directionalLight.shadow.bias = - 1e-4;
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+ directionalLight.shadow.normalBias = 1e-4;
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+ scene.add( directionalLight );
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+
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+ // renderer
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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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+ renderer.shadowMap.enabled = true;
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+ renderer.shadowMap.type = THREE.PCFSoftShadow;
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+ document.body.appendChild( renderer.domElement );
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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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+ // add shadow plane
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+ const plane = new THREE.Mesh(
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+ new THREE.PlaneGeometry(),
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+ new THREE.ShadowMaterial( {
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+ color: 0xd81b60,
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+ transparent: true,
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+ opacity: 0.075,
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+ side: THREE.DoubleSide,
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+ } ),
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+ );
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+ plane.position.y = - 3;
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+ plane.rotation.x = - Math.PI / 2;
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+ plane.scale.setScalar( 10 );
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+ plane.receiveShadow = true;
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+ scene.add( plane );
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+
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+ // create brushes
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+ evaluator = new Evaluator();
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+
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+ baseBrush = new Brush(
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+ new THREE.IcosahedronGeometry( 2, 3 ),
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+ new THREE.MeshStandardMaterial( {
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+ flatShading: true,
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+
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+ polygonOffset: true,
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+ polygonOffsetUnits: 1,
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+ polygonOffsetFactor: 1,
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+ } ),
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+ );
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+
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+ brush = new Brush(
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+ new THREE.CylinderGeometry( 1, 1, 5, 45 ),
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+ new THREE.MeshStandardMaterial( {
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+ color: 0x80cbc4,
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+
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+ polygonOffset: true,
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+ polygonOffsetUnits: 1,
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+ polygonOffsetFactor: 1,
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+
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+ } ),
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+ );
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+
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+ core = new Brush(
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+ new THREE.IcosahedronGeometry( 0.1, 1 ),
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+ new THREE.MeshStandardMaterial( {
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+ flatShading: true,
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+ color: 0xff9800,
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+ emissive: 0xff9800,
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+ emissiveIntensity: 0.35,
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+
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+ polygonOffset: true,
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+ polygonOffsetUnits: 1,
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+ polygonOffsetFactor: 1,
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+
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+ } ),
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+ );
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+ scene.add( core );
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+
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+ // create wireframe
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+ wireframe = new THREE.Mesh(
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+ undefined,
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+ new THREE.MeshBasicMaterial( { color: 0x009688, wireframe: true } ),
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+ );
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+ scene.add( wireframe );
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+
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+ // controls
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+ const controls = new OrbitControls( camera, renderer.domElement );
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+ controls.minDistance = 5;
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+ controls.maxDistance = 75;
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+
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+ // set up gui
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+ const gui = new GUI();
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+ gui.add( params, 'operation', { SUBTRACTION, INTERSECTION, ADDITION } );
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+
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+ // disabling wireframe until next CSG release. See mrdoob/three.js#25299
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+ // gui.add( params, 'wireframe' );
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+ gui.add( params, 'useGroups' );
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+
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+ window.addEventListener( 'resize', onWindowResize );
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+ onWindowResize();
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+
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+ }
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+
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+ function updateCSG() {
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+
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+ evaluator.useGroups = params.useGroups;
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+ result = evaluator.evaluate( baseBrush, brush, params.operation, result );
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+
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+ result.castShadow = true;
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+ result.receiveShadow = true;
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+ scene.add( result );
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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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+
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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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+ // update the transforms
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+ const t = window.performance.now() + 9000;
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+ baseBrush.rotation.x = t * 0.0001;
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+ baseBrush.rotation.y = t * 0.00025;
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+ baseBrush.rotation.z = t * 0.0005;
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+ baseBrush.updateMatrixWorld();
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+
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+ brush.rotation.x = t * - 0.0002;
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+ brush.rotation.y = t * - 0.0005;
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+ brush.rotation.z = t * - 0.001;
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+
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+ const s = 0.5 + 0.5 * ( 1 + Math.sin( t * 0.001 ) );
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+ brush.scale.set( s, 1, s );
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+ brush.updateMatrixWorld();
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+
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+ // update the csg
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+ updateCSG();
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+
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+ wireframe.geometry = result.geometry;
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+ wireframe.visible = params.wireframe;
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+
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+ renderer.render( scene, camera );
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+ stats.update();
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+
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+ }
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+
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+ </script>
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+
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+ </body>
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+</html>
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Garrett Johnson
