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368 lines
9.1 KiB
368 lines
9.1 KiB
3 years ago
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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 - marching cubes</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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<div id="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> -
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marching cubes<br/>
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based on greggman's <a href="https://webglsamples.org/blob/blob.html">blob</a>, original code by Henrik Rydgård
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</div>
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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/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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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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}
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}
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</script>
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<script type="module">
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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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { MarchingCubes } from 'three/addons/objects/MarchingCubes.js';
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import { ToonShader1, ToonShader2, ToonShaderHatching, ToonShaderDotted } from 'three/addons/shaders/ToonShader.js';
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let container, stats;
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let camera, scene, renderer;
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let materials, current_material;
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let light, pointLight, ambientLight;
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let effect, resolution;
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let effectController;
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let time = 0;
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const clock = new THREE.Clock();
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init();
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animate();
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function init() {
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container = document.getElementById( 'container' );
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// CAMERA
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.set( - 500, 500, 1500 );
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// SCENE
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x050505 );
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// LIGHTS
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light = new THREE.DirectionalLight( 0xffffff );
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light.position.set( 0.5, 0.5, 1 );
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scene.add( light );
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pointLight = new THREE.PointLight( 0xff3300 );
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pointLight.position.set( 0, 0, 100 );
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scene.add( pointLight );
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ambientLight = new THREE.AmbientLight( 0x080808 );
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scene.add( ambientLight );
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// MATERIALS
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materials = generateMaterials();
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current_material = 'shiny';
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// MARCHING CUBES
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resolution = 28;
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effect = new MarchingCubes( resolution, materials[ current_material ], true, true, 100000 );
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effect.position.set( 0, 0, 0 );
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effect.scale.set( 700, 700, 700 );
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effect.enableUvs = false;
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effect.enableColors = false;
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scene.add( effect );
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// RENDERER
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renderer = new THREE.WebGLRenderer();
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renderer.outputEncoding = THREE.sRGBEncoding;
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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// CONTROLS
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.minDistance = 500;
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controls.maxDistance = 5000;
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// STATS
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stats = new Stats();
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container.appendChild( stats.dom );
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// GUI
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setupGui();
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// EVENTS
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window.addEventListener( 'resize', onWindowResize );
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}
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//
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function generateMaterials() {
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// environment map
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const path = 'textures/cube/SwedishRoyalCastle/';
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const format = '.jpg';
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const urls = [
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path + 'px' + format, path + 'nx' + format,
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path + 'py' + format, path + 'ny' + format,
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path + 'pz' + format, path + 'nz' + format
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];
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const cubeTextureLoader = new THREE.CubeTextureLoader();
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const reflectionCube = cubeTextureLoader.load( urls );
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const refractionCube = cubeTextureLoader.load( urls );
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refractionCube.mapping = THREE.CubeRefractionMapping;
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// toons
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const toonMaterial1 = createShaderMaterial( ToonShader1, light, ambientLight );
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const toonMaterial2 = createShaderMaterial( ToonShader2, light, ambientLight );
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const hatchingMaterial = createShaderMaterial( ToonShaderHatching, light, ambientLight );
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const dottedMaterial = createShaderMaterial( ToonShaderDotted, light, ambientLight );
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const texture = new THREE.TextureLoader().load( 'textures/uv_grid_opengl.jpg' );
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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const materials = {
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'shiny': new THREE.MeshStandardMaterial( { color: 0x550000, envMap: reflectionCube, roughness: 0.1, metalness: 1.0 } ),
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'chrome': new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: reflectionCube } ),
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'liquid': new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: refractionCube, refractionRatio: 0.85 } ),
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'matte': new THREE.MeshPhongMaterial( { specular: 0x111111, shininess: 1 } ),
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'flat': new THREE.MeshLambertMaterial( { /*TODO flatShading: true */ } ),
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'textured': new THREE.MeshPhongMaterial( { color: 0xffffff, specular: 0x111111, shininess: 1, map: texture } ),
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'colors': new THREE.MeshPhongMaterial( { color: 0xffffff, specular: 0xffffff, shininess: 2, vertexColors: true } ),
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'multiColors': new THREE.MeshPhongMaterial( { shininess: 2, vertexColors: true } ),
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'plastic': new THREE.MeshPhongMaterial( { specular: 0x888888, shininess: 250 } ),
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'toon1': toonMaterial1,
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'toon2': toonMaterial2,
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'hatching': hatchingMaterial,
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'dotted': dottedMaterial
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};
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return materials;
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}
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function createShaderMaterial( shader, light, ambientLight ) {
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const u = THREE.UniformsUtils.clone( shader.uniforms );
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const vs = shader.vertexShader;
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const fs = shader.fragmentShader;
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const material = new THREE.ShaderMaterial( { uniforms: u, vertexShader: vs, fragmentShader: fs } );
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material.uniforms[ 'uDirLightPos' ].value = light.position;
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material.uniforms[ 'uDirLightColor' ].value = light.color;
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material.uniforms[ 'uAmbientLightColor' ].value = ambientLight.color;
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return material;
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}
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//
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function setupGui() {
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const createHandler = function ( id ) {
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return function () {
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current_material = id;
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effect.material = materials[ id ];
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effect.enableUvs = ( current_material === 'textured' ) ? true : false;
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effect.enableColors = ( current_material === 'colors' || current_material === 'multiColors' ) ? true : false;
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};
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};
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effectController = {
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material: 'shiny',
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speed: 1.0,
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numBlobs: 10,
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resolution: 28,
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isolation: 80,
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floor: true,
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wallx: false,
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wallz: false,
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dummy: function () {}
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};
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let h;
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const gui = new GUI();
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// material (type)
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h = gui.addFolder( 'Materials' );
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for ( const m in materials ) {
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effectController[ m ] = createHandler( m );
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h.add( effectController, m ).name( m );
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}
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// simulation
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h = gui.addFolder( 'Simulation' );
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h.add( effectController, 'speed', 0.1, 8.0, 0.05 );
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h.add( effectController, 'numBlobs', 1, 50, 1 );
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h.add( effectController, 'resolution', 14, 100, 1 );
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h.add( effectController, 'isolation', 10, 300, 1 );
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h.add( effectController, 'floor' );
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h.add( effectController, 'wallx' );
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h.add( effectController, 'wallz' );
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}
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// this controls content of marching cubes voxel field
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function updateCubes( object, time, numblobs, floor, wallx, wallz ) {
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object.reset();
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// fill the field with some metaballs
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const rainbow = [
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new THREE.Color( 0xff0000 ),
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new THREE.Color( 0xff7f00 ),
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new THREE.Color( 0xffff00 ),
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new THREE.Color( 0x00ff00 ),
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new THREE.Color( 0x0000ff ),
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new THREE.Color( 0x4b0082 ),
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new THREE.Color( 0x9400d3 )
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];
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const subtract = 12;
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const strength = 1.2 / ( ( Math.sqrt( numblobs ) - 1 ) / 4 + 1 );
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for ( let i = 0; i < numblobs; i ++ ) {
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const ballx = Math.sin( i + 1.26 * time * ( 1.03 + 0.5 * Math.cos( 0.21 * i ) ) ) * 0.27 + 0.5;
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const bally = Math.abs( Math.cos( i + 1.12 * time * Math.cos( 1.22 + 0.1424 * i ) ) ) * 0.77; // dip into the floor
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const ballz = Math.cos( i + 1.32 * time * 0.1 * Math.sin( ( 0.92 + 0.53 * i ) ) ) * 0.27 + 0.5;
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if ( current_material === 'multiColors' ) {
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object.addBall( ballx, bally, ballz, strength, subtract, rainbow[ i % 7 ] );
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} else {
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object.addBall( ballx, bally, ballz, strength, subtract );
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}
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}
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if ( floor ) object.addPlaneY( 2, 12 );
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if ( wallz ) object.addPlaneZ( 2, 12 );
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if ( wallx ) object.addPlaneX( 2, 12 );
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object.update();
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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const delta = clock.getDelta();
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time += delta * effectController.speed * 0.5;
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// marching cubes
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if ( effectController.resolution !== resolution ) {
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resolution = effectController.resolution;
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effect.init( Math.floor( resolution ) );
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}
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if ( effectController.isolation !== effect.isolation ) {
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effect.isolation = effectController.isolation;
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}
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updateCubes( effect, time, effectController.numBlobs, effectController.floor, effectController.wallx, effectController.wallz );
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// render
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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