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@@ -7,6 +7,12 @@
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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> webgl - instancing - dynamic<br/>
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+ Based on <a href="https://web.archive.org/web/20210101053442/http://oos.moxiecode.com/js_webgl/cubescape/" target="_blank" rel="noopener">Cubescape</a>
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+ by <a href="https://github.com/oosmoxiecode" target="_blank" rel="noopener">oosmoxiecode</a>
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+ </div>
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+
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<script type="importmap">
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{
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"imports": {
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@@ -20,64 +26,119 @@
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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 { Timer } from 'three/addons/misc/Timer.js';
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+ import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';
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+ import TWEEN from 'three/addons/libs/tween.module.js';
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+
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+ let camera, scene, renderer, timer, mesh;
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- let camera, scene, renderer, stats;
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+ const amount = 100;
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- let mesh;
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- const amount = parseInt( window.location.search.slice( 1 ) ) || 10;
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- const count = Math.pow( amount, 3 );
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+ const count = Math.pow( amount, 2 );
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const dummy = new THREE.Object3D();
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+ const seeds = [];
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+ const baseColors = [];
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+
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+ const color = new THREE.Color();
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+ const colors = [ new THREE.Color( 0x00ffff ), new THREE.Color( 0xffff00 ), new THREE.Color( 0xff00ff ) ];
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+ const animation = { t: 0 };
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+ let currentColorIndex = 0;
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+ let nextColorIndex = 1;
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+
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+ const maxDistance = 75;
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+ const cameraTarget = new THREE.Vector3();
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+
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init();
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function init() {
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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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+ renderer.toneMapping = THREE.NeutralToneMapping;
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+ renderer.setAnimationLoop( animate );
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+ document.body.appendChild( renderer.domElement );
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+
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camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
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- camera.position.set( amount * 0.9, amount * 0.9, amount * 0.9 );
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+ camera.position.set( 10, 10, 10 );
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camera.lookAt( 0, 0, 0 );
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+ const pmremGenerator = new THREE.PMREMGenerator( renderer );
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+
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scene = new THREE.Scene();
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+ scene.background = new THREE.Color( 0xadd8e6 );
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+ scene.environment = pmremGenerator.fromScene( new RoomEnvironment(), 0.04 ).texture;
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- const loader = new THREE.BufferGeometryLoader();
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- loader.load( 'models/json/suzanne_buffergeometry.json', function ( geometry ) {
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+ timer = new Timer();
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+ timer.connect( document );
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- geometry.computeVertexNormals();
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- geometry.scale( 0.5, 0.5, 0.5 );
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+ const loader = new THREE.TextureLoader();
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+ const texture = loader.load( 'textures/edge3.jpg' );
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+ texture.colorSpace = THREE.SRGBColorSpace;
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- const material = new THREE.MeshNormalMaterial();
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- // check overdraw
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- // let material = new THREE.MeshBasicMaterial( { color: 0xff0000, opacity: 0.1, transparent: true } );
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+ const geometry = new THREE.BoxGeometry();
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+ const material = new THREE.MeshStandardMaterial( { map: texture } );
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- mesh = new THREE.InstancedMesh( geometry, material, count );
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- mesh.instanceMatrix.setUsage( THREE.DynamicDrawUsage ); // will be updated every frame
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- scene.add( mesh );
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+ mesh = new THREE.InstancedMesh( geometry, material, count );
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+ mesh.instanceMatrix.setUsage( THREE.DynamicDrawUsage ); // will be updated every frame
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+ scene.add( mesh );
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- //
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+ let i = 0;
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+ const offset = ( amount - 1 ) / 2;
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- const gui = new GUI();
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- gui.add( mesh, 'count', 0, count );
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+ for ( let x = 0; x < amount; x ++ ) {
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- } );
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+ for ( let z = 0; z < amount; z ++ ) {
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- //
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+ dummy.position.set( offset - x, 0, offset - z );
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+ dummy.scale.set( 1, 2, 1 );
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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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- renderer.setAnimationLoop( animate );
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- document.body.appendChild( renderer.domElement );
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+ dummy.updateMatrix();
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- //
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+ color.setHSL( 1, 0.5 + ( Math.random() * 0.5 ), 0.5 + ( Math.random() * 0.5 ) );
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+ baseColors.push( color.getHex() );
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+
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+ mesh.setMatrixAt( i, dummy.matrix );
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+ mesh.setColorAt( i, color.multiply( colors[ 0 ] ) );
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+
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+ i ++;
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+
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+ seeds.push( Math.random() );
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- stats = new Stats();
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- document.body.appendChild( stats.dom );
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+ }
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+
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+ }
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//
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window.addEventListener( 'resize', onWindowResize );
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+ setInterval( startTween, 3000 );
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+
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+ }
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+
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+ function startTween() {
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+
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+ // tween for animating color transition
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+
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+ new TWEEN.Tween( animation )
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+ .to( {
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+ t: 1
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+ }, 2000 )
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+ .easing( TWEEN.Easing.Sinusoidal.In )
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+ .onComplete( () => {
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+
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+ animation.t = 0;
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+
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+ currentColorIndex = nextColorIndex;
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+ nextColorIndex ++;
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+
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+ if ( nextColorIndex >= colors.length ) nextColorIndex = 0;
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+
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+ } )
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+ .start();
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+
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}
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function onWindowResize() {
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@@ -93,49 +154,68 @@
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function animate() {
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- render();
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+ timer.update();
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- stats.update();
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+ const time = timer.getElapsed();
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- }
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+ TWEEN.update();
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+
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+ // animate camera
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+
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+ camera.position.x = Math.sin( time / 4 ) * 10;
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+ camera.position.z = Math.cos( time / 4 ) * 10;
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+ camera.position.y = 8 + Math.cos( time / 2 ) * 2;
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+
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+ cameraTarget.x = Math.sin( time / 4 ) * - 8;
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+ cameraTarget.z = Math.cos( time / 2 ) * - 8;
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+
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+ camera.lookAt( cameraTarget );
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- function render() {
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+ camera.up.x = Math.sin( time / 400 );
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- if ( mesh ) {
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+ // animate instance positions and colors
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- const time = Date.now() * 0.001;
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+ for ( let i = 0; i < mesh.count; i ++ ) {
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- mesh.rotation.x = Math.sin( time / 4 );
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- mesh.rotation.y = Math.sin( time / 2 );
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+ mesh.getMatrixAt( i, dummy.matrix );
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+ dummy.matrix.decompose( dummy.position, dummy.quaternion, dummy.scale );
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- let i = 0;
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- const offset = ( amount - 1 ) / 2;
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+ dummy.position.y = Math.abs( Math.sin( ( time + seeds[ i ] ) * 2 + seeds[ i ] ) );
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- for ( let x = 0; x < amount; x ++ ) {
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+ dummy.updateMatrix();
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- for ( let y = 0; y < amount; y ++ ) {
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+ mesh.setMatrixAt( i, dummy.matrix );
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- for ( let z = 0; z < amount; z ++ ) {
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+ // colors
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- dummy.position.set( offset - x, offset - y, offset - z );
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- dummy.rotation.y = ( Math.sin( x / 4 + time ) + Math.sin( y / 4 + time ) + Math.sin( z / 4 + time ) );
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- dummy.rotation.z = dummy.rotation.y * 2;
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+ if ( animation.t > 0 ) {
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- dummy.updateMatrix();
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+ const currentColor = colors[ currentColorIndex ];
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+ const nextColor = colors[ nextColorIndex ];
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+
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+ const f = dummy.position.length() / maxDistance;
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- mesh.setMatrixAt( i ++, dummy.matrix );
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+ if ( f <= animation.t ) {
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- }
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+ color.set( baseColors[ i ] ).multiply( nextColor );
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+
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+ } else {
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+
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+ color.set( baseColors[ i ] ).multiply( currentColor );
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}
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- }
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+ mesh.setColorAt( i, color );
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- mesh.instanceMatrix.needsUpdate = true;
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- mesh.computeBoundingSphere();
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+ }
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}
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+ mesh.instanceMatrix.needsUpdate = true;
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+ if ( animation.t > 0 ) mesh.instanceColor.needsUpdate = true;
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+
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+ mesh.computeBoundingSphere();
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+
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renderer.render( scene, camera );
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}
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Michael Herzog
