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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - animation - groups</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 - animation - groups
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import Stats from 'three/addons/libs/stats.module.js';
- let stats, clock;
- let scene, camera, renderer, mixer;
- init();
- function init() {
- scene = new THREE.Scene();
- //
- camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
- camera.position.set( 50, 50, 100 );
- camera.lookAt( scene.position );
- // all objects of this animation group share a common animation state
- const animationGroup = new THREE.AnimationObjectGroup();
- //
- const geometry = new THREE.BoxGeometry( 5, 5, 5 );
- const material = new THREE.MeshBasicMaterial( { transparent: true } );
- //
- for ( let i = 0; i < 5; i ++ ) {
- for ( let j = 0; j < 5; j ++ ) {
- const mesh = new THREE.Mesh( geometry, material );
- mesh.position.x = 32 - ( 16 * i );
- mesh.position.y = 0;
- mesh.position.z = 32 - ( 16 * j );
- scene.add( mesh );
- animationGroup.add( mesh );
- }
- }
- // create some keyframe tracks
- const xAxis = new THREE.Vector3( 1, 0, 0 );
- const qInitial = new THREE.Quaternion().setFromAxisAngle( xAxis, 0 );
- const qFinal = new THREE.Quaternion().setFromAxisAngle( xAxis, Math.PI );
- const quaternionKF = new THREE.QuaternionKeyframeTrack( '.quaternion', [ 0, 1, 2 ], [ qInitial.x, qInitial.y, qInitial.z, qInitial.w, qFinal.x, qFinal.y, qFinal.z, qFinal.w, qInitial.x, qInitial.y, qInitial.z, qInitial.w ] );
- const colorKF = new THREE.ColorKeyframeTrack( '.material.color', [ 0, 1, 2 ], [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ], THREE.InterpolateDiscrete );
- const opacityKF = new THREE.NumberKeyframeTrack( '.material.opacity', [ 0, 1, 2 ], [ 1, 0, 1 ] );
- // create clip
- const clip = new THREE.AnimationClip( 'default', 3, [ quaternionKF, colorKF, opacityKF ] );
- // apply the animation group to the mixer as the root object
- mixer = new THREE.AnimationMixer( animationGroup );
- const clipAction = mixer.clipAction( clip );
- clipAction.play();
- //
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- //
- stats = new Stats();
- document.body.appendChild( stats.dom );
- //
- clock = new THREE.Clock();
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- const delta = clock.getDelta();
- if ( mixer ) {
- mixer.update( delta );
- }
- renderer.render( scene, camera );
- stats.update();
- }
- </script>
- </body>
- </html>
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