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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 - modifier - subdivision</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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+ </head>
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+ <body>
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+
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+ <div id="info">
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+ <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/>
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+ See external <a href="https://github.com/stevinz/three-subdivide" target="_blank" rel="noopener">three-subdivide</a> for more information on subdivision surfaces.
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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-subdivide": "https://unpkg.com/[email protected]/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 { LoopSubdivision } from 'three-subdivide';
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+ import { OrbitControls } from './jsm/controls/OrbitControls.js';
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+ import { GUI } from './jsm/libs/lil-gui.module.min.js';
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+
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+ let renderer, scene, camera;
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+ let texture;
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+ let meshMaterial, meshNormal, meshSmooth;
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+ let wireMaterial, wireNormal, wireSmooth;
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+
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+ const params = {
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+ geometry: 'Box',
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+ iterations: 3,
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+ split: true,
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+ uvSmooth: false,
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+ flatOnly: false,
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+ maxTriangles: 25000,
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+ wireframe: false
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+ };
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+
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+ init();
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+
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+ function init() {
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+
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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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+ document.body.appendChild( renderer.domElement );
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+
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+ scene = new THREE.Scene();
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+
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+ camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight );
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+ camera.position.set( 0, 0.7, 2.1 );
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+
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+ const controls = new OrbitControls( camera, renderer.domElement );
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+ controls.addEventListener( 'change', render ); // use if there is no animation loop
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+ controls.rotateSpeed = 0.5;
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+ controls.minZoom = 1;
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+ controls.target.set( 0, 0, 0 );
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+ controls.update();
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+
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+ texture = new THREE.TextureLoader().load( './textures/uv_grid_opengl.jpg', () => {
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+
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+ texture.wrapS = THREE.RepeatWrapping;
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+ texture.wrapT = THREE.RepeatWrapping;
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+
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+ render();
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+
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+ } );
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+
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+ meshMaterial = new THREE.MeshBasicMaterial( {
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+ map: texture,
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+ polygonOffset: true,
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+ polygonOffsetFactor: 1, // positive value pushes polygon further away
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+ polygonOffsetUnits: 1,
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+ side: THREE.DoubleSide
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+ } );
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+ meshNormal = new THREE.Mesh( new THREE.BufferGeometry(), meshMaterial );
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+ meshSmooth = new THREE.Mesh( new THREE.BufferGeometry(), meshMaterial );
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+ meshNormal.position.set( - 0.7, 0, 0 );
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+ meshSmooth.position.set( 0.7, 0, 0 );
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+ scene.add( meshNormal, meshSmooth );
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+
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+ wireMaterial = new THREE.MeshBasicMaterial( { color: 0xffffff, depthTest: true, wireframe: true } );
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+ wireNormal = new THREE.Mesh( new THREE.BufferGeometry(), wireMaterial );
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+ wireSmooth = new THREE.Mesh( new THREE.BufferGeometry(), wireMaterial );
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+ wireNormal.visible = false;
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+ wireSmooth.visible = false;
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+ wireNormal.position.copy( meshNormal.position );
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+ wireSmooth.position.copy( meshSmooth.position );
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+ scene.add( wireNormal, wireSmooth );
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+
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+ updateMeshes();
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+
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+ window.addEventListener( 'resize', onWindowResize );
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+
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+ const geomTypes = [ 'Box', 'Capsule', 'Circle', 'Cone', 'Cylinder', 'Dodecahedron', 'Icosahedron', 'Lathe', 'Octahedron', 'Plane', 'Ring', 'Sphere', 'Tetrahedron', 'Torus', 'TorusKnot' ];
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+
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+ const gui = new GUI();
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+
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+ const folder1 = gui.addFolder( 'Subdivide Params' );
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+ const geomController = folder1.add( params, 'geometry', geomTypes ).onFinishChange( () => {
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+
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+ const geom = params.geometry.toLowerCase();
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+
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+ params.split = geom === 'box' || geom === 'ring';
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+ params.uvSmooth = geom === 'circle' || geom === 'plane' || geom === 'ring';
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+
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+ refreshDisplay();
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+
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+ } );
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+
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+ folder1.add( params, 'iterations' ).min( 0 ).max( 5 ).step( 1 ).onFinishChange( updateMeshes );
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+ const splitController = folder1.add( params, 'split' ).onFinishChange( updateMeshes );
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+ const smoothController = folder1.add( params, 'uvSmooth' ).onFinishChange( updateMeshes );
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+ folder1.add( params, 'flatOnly' ).onFinishChange ( updateMeshes );
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+ folder1.add( params, 'maxTriangles' ).onFinishChange( updateMeshes );
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+
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+ const folder2 = gui.addFolder( 'View' );
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+ folder2.add( params, 'wireframe' ).onFinishChange( updateMeshes );
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+
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+ function refreshDisplay() {
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+
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+ geomController.updateDisplay();
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+ splitController.updateDisplay();
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+ smoothController.updateDisplay();
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+
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+ updateMeshes();
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+
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+ }
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+
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+ }
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+
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+ function getGeometry() {
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+
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+ switch ( params.geometry.toLowerCase() ) {
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+
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+ case 'box':
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+ return new THREE.BoxGeometry();
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+
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+ case 'capsule':
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+ return new THREE.CapsuleGeometry( 0.5, 0.5, 3, 5 );
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+
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+ case 'circle':
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+ return new THREE.CircleGeometry( 0.6, 10 );
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+
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+ case 'cone':
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+ return new THREE.ConeGeometry( 0.6, 1.5, 5, 3 );
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+
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+ case 'cylinder':
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+ return new THREE.CylinderGeometry( 0.5, 0.5, 1, 5, 5 );
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+
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+ case 'dodecahedron':
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+ return new THREE.DodecahedronGeometry( 0.6 );
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+
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+ case 'icosahedron':
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+ return new THREE.IcosahedronGeometry( 0.6 );
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+
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+ case 'lathe':
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+
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+ // Sine Wave
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+
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+ const points = [];
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+
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+ for ( let i = 0; i < 65; i += 5 ) {
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+
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+ let x = ( Math.sin( i * 0.2 ) * Math.sin( i * 0.1 ) * 15 + 50 ) * 1.2;
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+ let y = ( i - 5 ) * 3;
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+ points.push( new THREE.Vector2( x * 0.0075, y * 0.005 ) );
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+
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+ }
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+
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+ const latheGeometry = new THREE.LatheGeometry( points, 4 );
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+ latheGeometry.center();
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+
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+ return latheGeometry;
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+
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+ case 'octahedron':
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+ return new THREE.OctahedronGeometry( 0.7 );
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+
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+ case 'plane':
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+ return new THREE.PlaneGeometry();
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+
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+ case 'ring':
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+ return new THREE.RingGeometry( 0.3, 0.6, 10 );
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+
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+ case 'sphere':
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+ return new THREE.SphereGeometry( 0.6, 8, 4 );
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+
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+ case 'tetrahedron':
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+ return new THREE.TetrahedronGeometry( 0.8 );
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+
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+ case 'torus':
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+ return new THREE.TorusGeometry( 0.48, 0.24, 4, 6 );
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+
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+ case 'torusknot':
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+ return new THREE.TorusKnotGeometry( 0.38, 0.18, 20, 4 );
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+
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+ }
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+
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+ }
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+
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+ function updateMeshes() {
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+
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+ const normalGeometry = getGeometry();
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+ const smoothGeometry = LoopSubdivision.modify(
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+ normalGeometry,
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+ params.iterations,
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+ params.split,
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+ params.uvSmooth,
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+ params.flatOnly,
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+ params.maxTriangles
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+ );
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+
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+ meshNormal.geometry.dispose();
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+ meshSmooth.geometry.dispose();
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+ meshNormal.geometry = normalGeometry;
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+ meshSmooth.geometry = smoothGeometry;
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+
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+ wireNormal.geometry.dispose();
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+ wireSmooth.geometry.dispose();
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+ wireNormal.geometry = normalGeometry.clone();
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+ wireSmooth.geometry = smoothGeometry.clone();
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+
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+ wireNormal.visible = wireSmooth.visible = params.wireframe;
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+
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+ render();
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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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+ renderer.setSize( window.innerWidth, window.innerHeight );
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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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+ render();
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+
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+ }
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+
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+ function render() {
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+
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+ renderer.render( scene, camera );
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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>
|
Stephens Nunnally
