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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - modifier - subdivision</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> webgl - modifier - <a href="https://github.com/stevinz/three-subdivide" target="_blank" rel="noopener">subdivision</a><br/>
- See external <a href="https://github.com/stevinz/three-subdivide" target="_blank" rel="noopener">three-subdivide</a> for more information on subdivision surfaces.
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/",
- "three-subdivide": "https://cdn.jsdelivr.net/npm/three-subdivide@1.1.2/build/index.module.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { LoopSubdivision } from 'three-subdivide';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- let renderer, scene, camera;
- let texture;
- let meshNormal, meshSmooth;
- let wireNormal, wireSmooth;
- let wireMaterial;
- const params = {
- geometry: 'Box',
- iterations: 3,
- split: true,
- uvSmooth: false,
- preserveEdges: false,
- flatOnly: false,
- maxTriangles: 25000,
- flatShading: false,
- textured: true,
- wireframe: false
- };
- init();
- function init() {
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight );
- camera.position.set( 0, 0.7, 2.1 );
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.addEventListener( 'change', render ); // use if there is no animation loop
- controls.rotateSpeed = 0.5;
- controls.minZoom = 1;
- controls.target.set( 0, 0, 0 );
- controls.update();
- scene.add( new THREE.HemisphereLight( 0xffffff, 0x737373, 3 ) );
- const frontLight = new THREE.DirectionalLight( 0xffffff, 1.5 );
- const backLight = new THREE.DirectionalLight( 0xffffff, 1.5 );
- frontLight.position.set( 0, 1, 1 );
- backLight.position.set( 0, 1, - 1 );
- scene.add( frontLight, backLight );
- texture = new THREE.TextureLoader().load( './textures/uv_grid_opengl.jpg', () => {
- texture.wrapS = THREE.RepeatWrapping;
- texture.wrapT = THREE.RepeatWrapping;
- texture.colorSpace = THREE.SRGBColorSpace;
- render();
- } );
- meshNormal = new THREE.Mesh( new THREE.BufferGeometry(), new THREE.MeshBasicMaterial() );
- meshSmooth = new THREE.Mesh( new THREE.BufferGeometry(), new THREE.MeshBasicMaterial() );
- meshNormal.position.set( - 0.7, 0, 0 );
- meshSmooth.position.set( 0.7, 0, 0 );
- scene.add( meshNormal, meshSmooth );
- wireMaterial = new THREE.MeshBasicMaterial( { color: 0xffffff, depthTest: true, wireframe: true } );
- wireNormal = new THREE.Mesh( new THREE.BufferGeometry(), wireMaterial );
- wireSmooth = new THREE.Mesh( new THREE.BufferGeometry(), wireMaterial );
- wireNormal.visible = false;
- wireSmooth.visible = false;
- wireNormal.position.copy( meshNormal.position );
- wireSmooth.position.copy( meshSmooth.position );
- scene.add( wireNormal, wireSmooth );
- updateMeshes();
- window.addEventListener( 'resize', onWindowResize );
- const geomTypes = [ 'Box', 'Capsule', 'Circle', 'Cone', 'Cylinder', 'Dodecahedron', 'Icosahedron', 'Lathe', 'Octahedron', 'Plane', 'Ring', 'Sphere', 'Tetrahedron', 'Torus', 'TorusKnot' ];
- const gui = new GUI();
- const folder1 = gui.addFolder( 'Subdivide Params' );
- const geomController = folder1.add( params, 'geometry', geomTypes ).onFinishChange( () => {
- const geom = params.geometry.toLowerCase();
- params.split = geom === 'box' || geom === 'ring' || geom === 'plane';
- params.uvSmooth = geom === 'circle' || geom === 'plane' || geom === 'ring';
- refreshDisplay();
- } );
- folder1.add( params, 'iterations' ).min( 0 ).max( 5 ).step( 1 ).onFinishChange( updateMeshes );
- const splitController = folder1.add( params, 'split' ).onFinishChange( updateMeshes );
- const uvSmoothController = folder1.add( params, 'uvSmooth' ).onFinishChange( updateMeshes );
- const preserveController = folder1.add( params, 'preserveEdges' ).onFinishChange( updateMeshes );
- folder1.add( params, 'flatOnly' ).onFinishChange( updateMeshes );
- folder1.add( params, 'maxTriangles' ).onFinishChange( updateMeshes );
- const folder2 = gui.addFolder( 'Material' );
- folder2.add( params, 'flatShading' ).onFinishChange( updateMaterial );
- folder2.add( params, 'textured' ).onFinishChange( updateMaterial );
- folder2.add( params, 'wireframe' ).onFinishChange( updateWireframe );
- function refreshDisplay() {
- geomController.updateDisplay();
- splitController.updateDisplay();
- uvSmoothController.updateDisplay();
- preserveController.updateDisplay();
- updateMeshes();
- }
- }
- function getGeometry() {
- switch ( params.geometry.toLowerCase() ) {
- case 'box':
- return new THREE.BoxGeometry();
- case 'capsule':
- return new THREE.CapsuleGeometry( 0.5, 0.5, 3, 5 );
- case 'circle':
- return new THREE.CircleGeometry( 0.6, 10 );
- case 'cone':
- return new THREE.ConeGeometry( 0.6, 1.5, 5, 3 );
- case 'cylinder':
- return new THREE.CylinderGeometry( 0.5, 0.5, 1, 5, 4 );
- case 'dodecahedron':
- return new THREE.DodecahedronGeometry( 0.6 );
- case 'icosahedron':
- return new THREE.IcosahedronGeometry( 0.6 );
- case 'lathe':
- // Sine Wave
- const points = [];
- for ( let i = 0; i < 65; i += 5 ) {
- const x = ( Math.sin( i * 0.2 ) * Math.sin( i * 0.1 ) * 15 + 50 ) * 1.2;
- const y = ( i - 5 ) * 3;
- points.push( new THREE.Vector2( x * 0.0075, y * 0.005 ) );
- }
- const latheGeometry = new THREE.LatheGeometry( points, 4 );
- latheGeometry.center();
- return latheGeometry;
- case 'octahedron':
- return new THREE.OctahedronGeometry( 0.7 );
- case 'plane':
- return new THREE.PlaneGeometry();
- case 'ring':
- return new THREE.RingGeometry( 0.3, 0.6, 10 );
- case 'sphere':
- return new THREE.SphereGeometry( 0.6, 8, 4 );
- case 'tetrahedron':
- return new THREE.TetrahedronGeometry( 0.8 );
- case 'torus':
- return new THREE.TorusGeometry( 0.48, 0.24, 4, 6 );
- case 'torusknot':
- return new THREE.TorusKnotGeometry( 0.38, 0.18, 20, 4 );
- }
- }
- function updateMeshes() {
- const normalGeometry = getGeometry();
- const smoothGeometry = LoopSubdivision.modify( normalGeometry, params.iterations, params );
- meshNormal.geometry.dispose();
- meshSmooth.geometry.dispose();
- meshNormal.geometry = normalGeometry;
- meshSmooth.geometry = smoothGeometry;
- wireNormal.geometry.dispose();
- wireSmooth.geometry.dispose();
- wireNormal.geometry = normalGeometry.clone();
- wireSmooth.geometry = smoothGeometry.clone();
- updateMaterial();
- }
- function disposeMaterial( material ) {
- const materials = Array.isArray( material ) ? material : [ material ];
- for ( let i = 0; i < materials.length; i ++ ) {
- if ( materials[ i ].dispose ) materials[ i ].dispose();
- }
- }
- function updateMaterial() {
- disposeMaterial( meshNormal.material );
- disposeMaterial( meshSmooth.material );
- const materialParams = {
- color: ( params.textured ) ? 0xffffff : 0x808080,
- flatShading: params.flatShading,
- map: ( params.textured ) ? texture : null,
- polygonOffset: true,
- polygonOffsetFactor: 1, // positive value pushes polygon further away
- polygonOffsetUnits: 1
- };
- switch ( params.geometry.toLowerCase() ) {
- case 'circle':
- case 'lathe':
- case 'plane':
- case 'ring':
- materialParams.side = THREE.DoubleSide;
- break;
- case 'box':
- case 'capsule':
- case 'cone':
- case 'cylinder':
- case 'dodecahedron':
- case 'icosahedron':
- case 'octahedron':
- case 'sphere':
- case 'tetrahedron':
- case 'torus':
- case 'torusknot':
- materialParams.side = THREE.FrontSide;
- break;
- }
- meshNormal.material = meshSmooth.material = new THREE.MeshStandardMaterial( materialParams );
- render();
- }
- function updateWireframe() {
- wireNormal.visible = wireSmooth.visible = params.wireframe;
- render();
- }
- function onWindowResize() {
- renderer.setSize( window.innerWidth, window.innerHeight );
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- render();
- }
- function render() {
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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