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webgl_modifier_subdivision.html
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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>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/",
"three-subdivide": "https://unpkg.com/[email protected]/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, 1 ) );
const frontLight = new THREE.DirectionalLight( 0xffffff, 0.5 );
const backLight = new THREE.DirectionalLight( 0xffffff, 0.5 );
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;
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>