--- /dev/null
+import { VectorKeyframeTrack } from './tracks/VectorKeyframeTrack';
+import { QuaternionKeyframeTrack } from './tracks/QuaternionKeyframeTrack';
+import { NumberKeyframeTrack } from './tracks/NumberKeyframeTrack';
+import { AnimationUtils } from './AnimationUtils';
+import { KeyframeTrack } from './KeyframeTrack';
+import { _Math } from '../math/Math';
+
+/**
+ *
+ * Reusable set of Tracks that represent an animation.
+ *
+ * @author Ben Houston / http://clara.io/
+ * @author David Sarno / http://lighthaus.us/
+ */
+
+function AnimationClip( name, duration, tracks ) {
+
+ this.name = name;
+ this.tracks = tracks;
+ this.duration = ( duration !== undefined ) ? duration : - 1;
+
+ this.uuid = _Math.generateUUID();
+
+ // this means it should figure out its duration by scanning the tracks
+ if ( this.duration < 0 ) {
+
+ this.resetDuration();
+
+ }
+
+ this.optimize();
+
+}
+
+Object.assign( AnimationClip, {
+
+ parse: function ( json ) {
+
+ var tracks = [],
+ jsonTracks = json.tracks,
+ frameTime = 1.0 / ( json.fps || 1.0 );
+
+ for ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {
+
+ tracks.push( KeyframeTrack.parse( jsonTracks[ i ] ).scale( frameTime ) );
+
+ }
+
+ return new AnimationClip( json.name, json.duration, tracks );
+
+ },
+
+ toJSON: function ( clip ) {
+
+ var tracks = [],
+ clipTracks = clip.tracks;
+
+ var json = {
+
+ 'name': clip.name,
+ 'duration': clip.duration,
+ 'tracks': tracks
+
+ };
+
+ for ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {
+
+ tracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );
+
+ }
+
+ return json;
+
+ },
+
+ CreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {
+
+ var numMorphTargets = morphTargetSequence.length;
+ var tracks = [];
+
+ for ( var i = 0; i < numMorphTargets; i ++ ) {
+
+ var times = [];
+ var values = [];
+
+ times.push(
+ ( i + numMorphTargets - 1 ) % numMorphTargets,
+ i,
+ ( i + 1 ) % numMorphTargets );
+
+ values.push( 0, 1, 0 );
+
+ var order = AnimationUtils.getKeyframeOrder( times );
+ times = AnimationUtils.sortedArray( times, 1, order );
+ values = AnimationUtils.sortedArray( values, 1, order );
+
+ // if there is a key at the first frame, duplicate it as the
+ // last frame as well for perfect loop.
+ if ( ! noLoop && times[ 0 ] === 0 ) {
+
+ times.push( numMorphTargets );
+ values.push( values[ 0 ] );
+
+ }
+
+ tracks.push(
+ new NumberKeyframeTrack(
+ '.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',
+ times, values
+ ).scale( 1.0 / fps ) );
+
+ }
+
+ return new AnimationClip( name, - 1, tracks );
+
+ },
+
+ findByName: function ( objectOrClipArray, name ) {
+
+ var clipArray = objectOrClipArray;
+
+ if ( ! Array.isArray( objectOrClipArray ) ) {
+
+ var o = objectOrClipArray;
+ clipArray = o.geometry && o.geometry.animations || o.animations;
+
+ }
+
+ for ( var i = 0; i < clipArray.length; i ++ ) {
+
+ if ( clipArray[ i ].name === name ) {
+
+ return clipArray[ i ];
+
+ }
+
+ }
+
+ return null;
+
+ },
+
+ CreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {
+
+ var animationToMorphTargets = {};
+
+ // tested with https://regex101.com/ on trick sequences
+ // such flamingo_flyA_003, flamingo_run1_003, crdeath0059
+ var pattern = /^([\w-]*?)([\d]+)$/;
+
+ // sort morph target names into animation groups based
+ // patterns like Walk_001, Walk_002, Run_001, Run_002
+ for ( var i = 0, il = morphTargets.length; i < il; i ++ ) {
+
+ var morphTarget = morphTargets[ i ];
+ var parts = morphTarget.name.match( pattern );
+
+ if ( parts && parts.length > 1 ) {
+
+ var name = parts[ 1 ];
+
+ var animationMorphTargets = animationToMorphTargets[ name ];
+ if ( ! animationMorphTargets ) {
+
+ animationToMorphTargets[ name ] = animationMorphTargets = [];
+
+ }
+
+ animationMorphTargets.push( morphTarget );
+
+ }
+
+ }
+
+ var clips = [];
+
+ for ( var name in animationToMorphTargets ) {
+
+ clips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );
+
+ }
+
+ return clips;
+
+ },
+
+ // parse the animation.hierarchy format
+ parseAnimation: function ( animation, bones ) {
+
+ if ( ! animation ) {
+
+ console.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );
+ return null;
+
+ }
+
+ var addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {
+
+ // only return track if there are actually keys.
+ if ( animationKeys.length !== 0 ) {
+
+ var times = [];
+ var values = [];
+
+ AnimationUtils.flattenJSON( animationKeys, times, values, propertyName );
+
+ // empty keys are filtered out, so check again
+ if ( times.length !== 0 ) {
+
+ destTracks.push( new trackType( trackName, times, values ) );
+
+ }
+
+ }
+
+ };
+
+ var tracks = [];
+
+ var clipName = animation.name || 'default';
+ // automatic length determination in AnimationClip.
+ var duration = animation.length || - 1;
+ var fps = animation.fps || 30;
+
+ var hierarchyTracks = animation.hierarchy || [];
+
+ for ( var h = 0; h < hierarchyTracks.length; h ++ ) {
+
+ var animationKeys = hierarchyTracks[ h ].keys;
+
+ // skip empty tracks
+ if ( ! animationKeys || animationKeys.length === 0 ) continue;
+
+ // process morph targets
+ if ( animationKeys[ 0 ].morphTargets ) {
+
+ // figure out all morph targets used in this track
+ var morphTargetNames = {};
+
+ for ( var k = 0; k < animationKeys.length; k ++ ) {
+
+ if ( animationKeys[ k ].morphTargets ) {
+
+ for ( var m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {
+
+ morphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;
+
+ }
+
+ }
+
+ }
+
+ // create a track for each morph target with all zero
+ // morphTargetInfluences except for the keys in which
+ // the morphTarget is named.
+ for ( var morphTargetName in morphTargetNames ) {
+
+ var times = [];
+ var values = [];
+
+ for ( var m = 0; m !== animationKeys[ k ].morphTargets.length; ++ m ) {
+
+ var animationKey = animationKeys[ k ];
+
+ times.push( animationKey.time );
+ values.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );
+
+ }
+
+ tracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );
+
+ }
+
+ duration = morphTargetNames.length * ( fps || 1.0 );
+
+ } else {
+
+ // ...assume skeletal animation
+
+ var boneName = '.bones[' + bones[ h ].name + ']';
+
+ addNonemptyTrack(
+ VectorKeyframeTrack, boneName + '.position',
+ animationKeys, 'pos', tracks );
+
+ addNonemptyTrack(
+ QuaternionKeyframeTrack, boneName + '.quaternion',
+ animationKeys, 'rot', tracks );
+
+ addNonemptyTrack(
+ VectorKeyframeTrack, boneName + '.scale',
+ animationKeys, 'scl', tracks );
+
+ }
+
+ }
+
+ if ( tracks.length === 0 ) {
+
+ return null;
+
+ }
+
+ var clip = new AnimationClip( clipName, duration, tracks );
+
+ return clip;
+
+ }
+
+} );
+
+Object.assign( AnimationClip.prototype, {
+
+ resetDuration: function () {
+
+ var tracks = this.tracks, duration = 0;
+
+ for ( var i = 0, n = tracks.length; i !== n; ++ i ) {
+
+ var track = this.tracks[ i ];
+
+ duration = Math.max( duration, track.times[ track.times.length - 1 ] );
+
+ }
+
+ this.duration = duration;
+
+ },
+
+ trim: function () {
+
+ for ( var i = 0; i < this.tracks.length; i ++ ) {
+
+ this.tracks[ i ].trim( 0, this.duration );
+
+ }
+
+ return this;
+
+ },
+
+ optimize: function () {
+
+ for ( var i = 0; i < this.tracks.length; i ++ ) {
+
+ this.tracks[ i ].optimize();
+
+ }
+
+ return this;
+
+ }
+
+} );
+
+
+export { AnimationClip };
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