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73 lines
1.3 KiB
73 lines
1.3 KiB
/**
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* @author mrdoob / http://mrdoob.com
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* @author willy-vvu / http://willy-vvu.github.io
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*/
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THREE.MorphAnimation = function ( mesh ) {
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this.mesh = mesh;
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this.frames = mesh.morphTargetInfluences.length;
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this.currentTime = 0;
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this.duration = 1000;
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this.loop = true;
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this.lastFrame = 0;
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this.currentFrame = 0;
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this.isPlaying = false;
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};
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THREE.MorphAnimation.prototype = {
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constructor: THREE.MorphAnimation,
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play: function () {
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this.isPlaying = true;
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},
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pause: function () {
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this.isPlaying = false;
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},
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update: function ( delta ) {
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if ( this.isPlaying === false ) return;
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this.currentTime += delta;
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if ( this.loop === true && this.currentTime > this.duration ) {
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this.currentTime %= this.duration;
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}
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this.currentTime = Math.min( this.currentTime, this.duration );
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var frameTime = this.duration / this.frames;
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var frame = Math.floor( this.currentTime / frameTime );
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var influences = this.mesh.morphTargetInfluences;
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if ( frame !== this.currentFrame ) {
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influences[ this.lastFrame ] = 0;
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influences[ this.currentFrame ] = 1;
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influences[ frame ] = 0;
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this.lastFrame = this.currentFrame;
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this.currentFrame = frame;
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}
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var mix = ( this.currentTime % frameTime ) / frameTime;
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influences[ frame ] = mix;
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influences[ this.lastFrame ] = 1 - mix;
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}
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};
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