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227 lines
6.2 KiB
227 lines
6.2 KiB
2 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 - post processing - pixelation</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="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Pixelation pass with optional single pixel outlines by
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<a href="https://github.com/KodyJKing" target="_blank" rel="noopener">Kody King</a><br /><br />
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</div>
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<div id="container"></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 { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
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import { RenderPixelatedPass } from 'three/addons/postprocessing/RenderPixelatedPass.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let camera, scene, renderer, composer, crystalMesh, clock;
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let gui, params;
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init();
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animate();
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function init() {
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const aspectRatio = window.innerWidth / window.innerHeight;
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camera = new THREE.OrthographicCamera( - aspectRatio, aspectRatio, 1, - 1, 0.1, 10 );
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camera.position.y = 2 * Math.tan( Math.PI / 6 );
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camera.position.z = 2;
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x151729 );
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clock = new THREE.Clock();
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renderer = new THREE.WebGLRenderer();
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renderer.shadowMap.enabled = 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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composer = new EffectComposer( renderer );
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const renderPixelatedPass = new RenderPixelatedPass( 6, scene, camera );
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composer.addPass( renderPixelatedPass );
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window.addEventListener( 'resize', onWindowResize );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.maxZoom = 2;
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// gui
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gui = new GUI();
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params = { pixelSize: 6, normalEdgeStrength: .3, depthEdgeStrength: .4 };
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gui.add( params, 'pixelSize' ).min( 1 ).max( 16 ).step( 1 )
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.onChange( () => {
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renderPixelatedPass.setPixelSize( params.pixelSize );
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} );
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gui.add( renderPixelatedPass, 'normalEdgeStrength' ).min( 0 ).max( 2 ).step( .05 );
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gui.add( renderPixelatedPass, 'depthEdgeStrength' ).min( 0 ).max( 1 ).step( .05 );
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// textures
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const loader = new THREE.TextureLoader();
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const texChecker = pixelTexture( loader.load( 'textures/checker.png' ) );
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const texChecker2 = pixelTexture( loader.load( 'textures/checker.png' ) );
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texChecker.repeat.set( 3, 3 );
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texChecker2.repeat.set( 1.5, 1.5 );
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// meshes
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const boxMaterial = new THREE.MeshPhongMaterial( { map: texChecker2 } );
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function addBox( boxSideLength, x, z, rotation ) {
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const mesh = new THREE.Mesh( new THREE.BoxGeometry( boxSideLength, boxSideLength, boxSideLength ), boxMaterial );
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mesh.castShadow = true;
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mesh.receiveShadow = true;
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mesh.rotation.y = rotation;
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mesh.position.y = boxSideLength / 2;
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mesh.position.set( x, boxSideLength / 2 + .0001, z );
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scene.add( mesh );
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return mesh;
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}
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addBox( .4, 0, 0, Math.PI / 4 );
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addBox( .5, - .5, - .5, Math.PI / 4 );
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const planeSideLength = 2;
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const planeMesh = new THREE.Mesh(
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new THREE.PlaneGeometry( planeSideLength, planeSideLength ),
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new THREE.MeshPhongMaterial( { map: texChecker } )
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);
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planeMesh.receiveShadow = true;
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planeMesh.rotation.x = - Math.PI / 2;
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scene.add( planeMesh );
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const radius = .2;
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const geometry = new THREE.IcosahedronGeometry( radius );
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crystalMesh = new THREE.Mesh(
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geometry,
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new THREE.MeshPhongMaterial( {
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color: 0x2379cf,
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emissive: 0x143542,
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shininess: 10,
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specular: 0xffffff
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} )
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);
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crystalMesh.receiveShadow = true;
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crystalMesh.castShadow = true;
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scene.add( crystalMesh );
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// lights
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scene.add( new THREE.AmbientLight( 0x2d3645, 1.5 ) );
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const directionalLight = new THREE.DirectionalLight( 0xfffc9c, .5 );
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directionalLight.position.set( 100, 100, 100 );
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directionalLight.castShadow = true;
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directionalLight.shadow.mapSize.set( 2048, 2048 );
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scene.add( directionalLight );
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const spotLight = new THREE.SpotLight( 0xff8800, 1, 10, Math.PI / 16, .02, 2 );
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spotLight.position.set( 2, 2, 0 );
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const target = spotLight.target;
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scene.add( target );
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target.position.set( 0, 0, 0 );
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spotLight.castShadow = true;
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scene.add( spotLight );
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}
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function onWindowResize() {
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const aspectRatio = window.innerWidth / window.innerHeight;
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camera.left = - aspectRatio;
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camera.right = aspectRatio;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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composer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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const t = clock.getElapsedTime();
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crystalMesh.material.emissiveIntensity = Math.sin( t * 3 ) * .5 + .5;
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crystalMesh.position.y = .7 + Math.sin( t * 2 ) * .05;
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crystalMesh.rotation.y = stopGoEased( t, 2, 4 ) * 2 * Math.PI;
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composer.render();
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}
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// Helper functions
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function pixelTexture( texture ) {
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texture.minFilter = THREE.NearestFilter;
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texture.magFilter = THREE.NearestFilter;
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texture.generateMipmaps = false;
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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return texture;
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}
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function easeInOutCubic( x ) {
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return x ** 2 * 3 - x ** 3 * 2;
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}
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function linearStep( x, edge0, edge1 ) {
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const w = edge1 - edge0;
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const m = 1 / w;
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const y0 = - m * edge0;
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return THREE.MathUtils.clamp( y0 + m * x, 0, 1 );
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}
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function stopGoEased( x, downtime, period ) {
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const cycle = ( x / period ) | 0;
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const tween = x - cycle * period;
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const linStep = easeInOutCubic( linearStep( tween, downtime, period ) );
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return cycle + linStep;
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}
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</script>
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</body>
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</html>
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