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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - postprocessing - pixel shader</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="container"></div>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - pixel shader by <a href="http://wongbryan.github.io">wongbryan</a>
- </div>
- <script type="module">
- import * as THREE from '../build/three.module.js';
- import { GUI } from './jsm/libs/dat.gui.module.js';
- import { TrackballControls } from './jsm/controls/TrackballControls.js';
- import { EffectComposer } from './jsm/postprocessing/EffectComposer.js';
- import { RenderPass } from './jsm/postprocessing/RenderPass.js';
- import { ShaderPass } from './jsm/postprocessing/ShaderPass.js';
- import { PixelShader } from './jsm/shaders/PixelShader.js';
- var camera, scene, renderer, gui, composer, controls;
- var pixelPass, params;
- var group;
- init();
- animate();
- function updateGUI() {
- pixelPass.uniforms[ "pixelSize" ].value = params.pixelSize;
- }
- function resize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- pixelPass.uniforms[ "resolution" ].value.set( window.innerWidth, window.innerHeight ).multiplyScalar( window.devicePixelRatio );
- }
- function init() {
- var container = document.getElementById( 'container' );
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- container.appendChild( renderer.domElement );
- camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 10000 );
- camera.position.set( 0, 0, 30 );
- controls = new TrackballControls( camera, renderer.domElement );
- controls.rotateSpeed = 2.0;
- controls.panSpeed = 0.8;
- controls.zoomSpeed = 1.5;
- scene = new THREE.Scene();
- var hemisphereLight = new THREE.HemisphereLight( 0xfceafc, 0x000000, .8 );
- scene.add( hemisphereLight );
- var dirLight = new THREE.DirectionalLight( 0xffffff, .5 );
- dirLight.position.set( 150, 75, 150 );
- scene.add( dirLight );
- var dirLight2 = new THREE.DirectionalLight( 0xffffff, .2 );
- dirLight2.position.set( - 150, 75, - 150 );
- scene.add( dirLight2 );
- var dirLight3 = new THREE.DirectionalLight( 0xffffff, .1 );
- dirLight3.position.set( 0, 125, 0 );
- scene.add( dirLight3 );
- var geometries = [
- new THREE.SphereBufferGeometry( 1, 64, 64 ),
- new THREE.BoxBufferGeometry( 1, 1, 1 ),
- new THREE.ConeBufferGeometry( 1, 1, 32 ),
- new THREE.TetrahedronBufferGeometry( 1 ),
- new THREE.TorusKnotBufferGeometry( 1, .4 )
- ];
- group = new THREE.Group();
- for ( var i = 0; i < 25; i ++ ) {
- var geom = geometries[ Math.floor( Math.random() * geometries.length ) ];
- var color = new THREE.Color();
- color.setHSL( Math.random(), .7 + .2 * Math.random(), .5 + .1 * Math.random() );
- var mat = new THREE.MeshPhongMaterial( { color: color, shininess: 200 } );
- var mesh = new THREE.Mesh( geom, mat );
- var s = 4 + Math.random() * 10;
- mesh.scale.set( s, s, s );
- mesh.position.set( Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 ).normalize();
- mesh.position.multiplyScalar( Math.random() * 200 );
- mesh.rotation.set( Math.random() * 2, Math.random() * 2, Math.random() * 2 );
- group.add( mesh );
- }
- scene.add( group );
- composer = new EffectComposer( renderer );
- composer.addPass( new RenderPass( scene, camera ) );
- pixelPass = new ShaderPass( PixelShader );
- pixelPass.uniforms[ "resolution" ].value = new THREE.Vector2( window.innerWidth, window.innerHeight );
- pixelPass.uniforms[ "resolution" ].value.multiplyScalar( window.devicePixelRatio );
- composer.addPass( pixelPass );
- window.addEventListener( 'resize', resize );
- params = {
- pixelSize: 16,
- postprocessing: true
- };
- gui = new GUI();
- gui.add( params, 'pixelSize' ).min( 2 ).max( 32 ).step( 2 );
- gui.add( params, 'postprocessing' );
- }
- function update() {
- controls.update();
- updateGUI();
- group.rotation.y += .0015;
- group.rotation.z += .001;
- }
- function animate() {
- update();
- if ( params.postprocessing ) {
- composer.render();
- } else {
- renderer.render( scene, camera );
- }
- window.requestAnimationFrame( animate );
- }
- </script>
- </body>
- </html>
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