1 /**
  2  * @author alteredq / http://alteredqualia.com/
  3  */
  4 
  5 /**@constructor*/
  6 THREE.MorphAnimMesh = function ( geometry, material ) {
  7 
  8 	THREE.Mesh.call( this, geometry, material );
  9 
 10 	// API
 11 
 12 	this.duration = 1000; // milliseconds
 13 	this.mirroredLoop = false;
 14 	this.time = 0;
 15 
 16 	// internals
 17 
 18 	this.lastKeyframe = 0;
 19 	this.currentKeyframe = 0;
 20 
 21 	this.direction = 1;
 22 	this.directionBackwards = false;
 23 
 24 	this.setFrameRange( 0, this.geometry.morphTargets.length - 1 );
 25 
 26 };
 27 
 28 THREE.MorphAnimMesh.prototype = Object.create( THREE.Mesh.prototype );
 29 
 30 THREE.MorphAnimMesh.prototype.setFrameRange = function ( start, end ) {
 31 
 32 	this.startKeyframe = start;
 33 	this.endKeyframe = end;
 34 
 35 	this.length = this.endKeyframe - this.startKeyframe + 1;
 36 
 37 };
 38 
 39 THREE.MorphAnimMesh.prototype.setDirectionForward = function () {
 40 
 41 	this.direction = 1;
 42 	this.directionBackwards = false;
 43 
 44 };
 45 
 46 THREE.MorphAnimMesh.prototype.setDirectionBackward = function () {
 47 
 48 	this.direction = -1;
 49 	this.directionBackwards = true;
 50 
 51 };
 52 
 53 THREE.MorphAnimMesh.prototype.parseAnimations = function () {
 54 
 55 	var geometry = this.geometry;
 56 
 57 	if ( ! geometry.animations ) geometry.animations = {};
 58 
 59 	var firstAnimation, animations = geometry.animations;
 60 
 61 	var pattern = /([a-z]+)(\d+)/;
 62 
 63 	for ( var i = 0, il = geometry.morphTargets.length; i < il; i ++ ) {
 64 
 65 		var morph = geometry.morphTargets[ i ];
 66 		var parts = morph.name.match( pattern );
 67 
 68 		if ( parts && parts.length > 1 ) {
 69 
 70 			var label = parts[ 1 ];
 71 			var num = parts[ 2 ];
 72 
 73 			if ( ! animations[ label ] ) animations[ label ] = { start: Infinity, end: -Infinity };
 74 
 75 			var animation = animations[ label ];
 76 
 77 			if ( i < animation.start ) animation.start = i;
 78 			if ( i > animation.end ) animation.end = i;
 79 
 80 			if ( ! firstAnimation ) firstAnimation = label;
 81 
 82 		}
 83 
 84 	}
 85 
 86 	geometry.firstAnimation = firstAnimation;
 87 
 88 };
 89 
 90 THREE.MorphAnimMesh.prototype.setAnimationLabel = function ( label, start, end ) {
 91 
 92 	if ( ! this.geometry.animations ) this.geometry.animations = {};
 93 
 94 	this.geometry.animations[ label ] = { start: start, end: end };
 95 
 96 };
 97 
 98 THREE.MorphAnimMesh.prototype.playAnimation = function ( label, fps ) {
 99 
100 	var animation = this.geometry.animations[ label ];
101 
102 	if ( animation ) {
103 
104 		this.setFrameRange( animation.start, animation.end );
105 		this.duration = 1000 * ( ( animation.end - animation.start ) / fps );
106 		this.time = 0;
107 
108 	} else {
109 
110 		console.warn( "animation[" + label + "] undefined" );
111 
112 	}
113 
114 };
115 
116 THREE.MorphAnimMesh.prototype.updateAnimation = function ( delta ) {
117 
118 	var frameTime = this.duration / this.length;
119 
120 	this.time += this.direction * delta;
121 
122 	if ( this.mirroredLoop ) {
123 
124 		if ( this.time > this.duration || this.time < 0 ) {
125 
126 			this.direction *= -1;
127 
128 			if ( this.time > this.duration ) {
129 
130 				this.time = this.duration;
131 				this.directionBackwards = true;
132 
133 			}
134 
135 			if ( this.time < 0 ) {
136 
137 				this.time = 0;
138 				this.directionBackwards = false;
139 
140 			}
141 
142 		}
143 
144 	} else {
145 
146 		this.time = this.time % this.duration;
147 
148 		if ( this.time < 0 ) this.time += this.duration;
149 
150 	}
151 
152 	var keyframe = this.startKeyframe + THREE.Math.clamp( Math.floor( this.time / frameTime ), 0, this.length - 1 );
153 
154 	if ( keyframe !== this.currentKeyframe ) {
155 
156 		this.morphTargetInfluences[ this.lastKeyframe ] = 0;
157 		this.morphTargetInfluences[ this.currentKeyframe ] = 1;
158 
159 		this.morphTargetInfluences[ keyframe ] = 0;
160 
161 		this.lastKeyframe = this.currentKeyframe;
162 		this.currentKeyframe = keyframe;
163 
164 	}
165 
166 	var mix = ( this.time % frameTime ) / frameTime;
167 
168 	if ( this.directionBackwards ) {
169 
170 		mix = 1 - mix;
171 
172 	}
173 
174 	this.morphTargetInfluences[ this.currentKeyframe ] = mix;
175 	this.morphTargetInfluences[ this.lastKeyframe ] = 1 - mix;
176 
177 };
178 
179 THREE.MorphAnimMesh.prototype.clone = function ( object ) {
180 
181 	if ( object === undefined ) object = new THREE.MorphAnimMesh( this.geometry, this.material );
182 
183 	object.duration = this.duration;
184 	object.mirroredLoop = this.mirroredLoop;
185 	object.time = this.time;
186 
187 	object.lastKeyframe = this.lastKeyframe;
188 	object.currentKeyframe = this.currentKeyframe;
189 
190 	object.direction = this.direction;
191 	object.directionBackwards = this.directionBackwards;
192 
193 	THREE.Mesh.prototype.clone.call( this, object );
194 
195 	return object;
196 
197 };
198 

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