createFromMorphTargetSequence static method

AnimationClip createFromMorphTargetSequence(String name, List<MorphTarget> morphTargetSequence, int fps, bool noLoop,)

Returns an array of new AnimationClips created from the morph target sequences of a geometry, trying to sort morph target names into animation-group-based patterns like "Walk_001, Walk_002, Run_001, Run_002...".

Implementation

/// sequences of a geometry, trying to sort morph target names into
	/// animation-group-based patterns like "Walk_001, Walk_002, Run_001, Run_002...".
static AnimationClip createFromMorphTargetSequence(
  String name,
  List<MorphTarget> morphTargetSequence,
  int fps,
  bool noLoop
) {
  final numMorphTargets = morphTargetSequence.length;
  final List<KeyframeTrack> tracks = [];

  for (int i = 0; i < numMorphTargets; i++) {
    List<num> times = [];
    List<num> values = [];

    times.addAll([
      (i + numMorphTargets - 1) % numMorphTargets,
      i,
      (i + 1) % numMorphTargets
    ]);

    values.addAll([0, 1, 0]);

    final 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.add(numMorphTargets);
      values.add(values[0]);
    }

    tracks.add(NumberKeyframeTrack('.morphTargetInfluences[${morphTargetSequence[i].name}]',times,values).scale(1.0 / fps));
  }

  return AnimationClip(name, -1, tracks);
}