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173 lines
4.3 KiB
173 lines
4.3 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - animation - basic</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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<style>
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body {
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color: #fff;
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font-family:Monospace;
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font-size:13px;
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text-align:center;
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background-color: #000;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px; width: 100%;
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padding: 5px;
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}
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a {
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color: #f00;
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}
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</style>
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</head>
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<body>
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<div id="info">
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<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - animation - basic use
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</div>
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<script src="../build/three.js"></script>
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<script src="js/WebGL.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script>
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if ( WEBGL.isWebGLAvailable() === false ) {
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document.body.appendChild( WEBGL.getWebGLErrorMessage() );
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}
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var stats, clock;
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var scene, camera, renderer, mixer;
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init();
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animate();
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function init() {
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scene = new THREE.Scene();
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//
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 50, 50, 100 );
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camera.lookAt( scene.position );
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//
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var axesHelper = new THREE.AxesHelper( 10 );
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scene.add( axesHelper );
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//
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var geometry = new THREE.BoxBufferGeometry( 5, 5, 5 );
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var material = new THREE.MeshBasicMaterial( { color: 0xffffff, transparent: true } );
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var mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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// create a keyframe track (i.e. a timed sequence of keyframes) for each animated property
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// Note: the keyframe track type should correspond to the type of the property being animated
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// POSITION
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var positionKF = new THREE.VectorKeyframeTrack( '.position', [ 0, 1, 2 ], [ 0, 0, 0, 30, 0, 0, 0, 0, 0 ] );
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// SCALE
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var scaleKF = new THREE.VectorKeyframeTrack( '.scale', [ 0, 1, 2 ], [ 1, 1, 1, 2, 2, 2, 1, 1, 1 ] );
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// ROTATION
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// Rotation should be performed using quaternions, using a QuaternionKeyframeTrack
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// Interpolating Euler angles (.rotation property) can be problematic and is currently not supported
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// set up rotation about x axis
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var xAxis = new THREE.Vector3( 1, 0, 0 );
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var qInitial = new THREE.Quaternion().setFromAxisAngle( xAxis, 0 );
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var qFinal = new THREE.Quaternion().setFromAxisAngle( xAxis, Math.PI );
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var 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 ] );
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// COLOR
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var colorKF = new THREE.ColorKeyframeTrack( '.material.color', [ 0, 1, 2 ], [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ], THREE.InterpolateDiscrete );
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// OPACITY
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var opacityKF = new THREE.NumberKeyframeTrack( '.material.opacity', [ 0, 1, 2 ], [ 1, 0, 1 ] );
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// create an animation sequence with the tracks
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// If a negative time value is passed, the duration will be calculated from the times of the passed tracks array
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var clip = new THREE.AnimationClip( 'Action', 3, [ scaleKF, positionKF, quaternionKF, colorKF, opacityKF ] );
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// setup the AnimationMixer
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mixer = new THREE.AnimationMixer( mesh );
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// create a ClipAction and set it to play
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var clipAction = mixer.clipAction( clip );
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clipAction.play();
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//
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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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document.body.appendChild( renderer.domElement );
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//
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stats = new Stats();
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document.body.appendChild( stats.dom );
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//
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clock = new THREE.Clock();
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//
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window.addEventListener( 'resize', onWindowResize, false );
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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 animate() {
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requestAnimationFrame( animate );
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render();
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}
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function render() {
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var delta = clock.getDelta();
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if ( mixer ) {
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mixer.update( delta );
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}
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renderer.render( scene, camera );
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stats.update();
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}
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</script>
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</body>
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</html>
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