public void AddAnimationTrack(string layer)
{
var track = CreateInstance <AnimationTrack>();
USUndoManager.RegisterCreatedObjectUndo(track, "Add New Track");
track.Layer = MecanimAnimationUtility.LayerNameToIndex(AnimationTimeline.AffectedObject.gameObject, layer);
USUndoManager.RegisterCompleteObjectUndo(AnimationTimeline, "Add New Track");
AnimationTimeline.AddTrack(track);
var hierarchyItem = CreateInstance(typeof(USAnimationTimelineTrackHierarchyItem)) as USAnimationTimelineTrackHierarchyItem;
USUndoManager.RegisterCreatedObjectUndo(hierarchyItem, "Add New Track");
hierarchyItem.AnimationTrack = track;
hierarchyItem.AnimationTimelineHierarchy = this;
hierarchyItem.AnimationTimeline = AnimationTimeline;
hierarchyItem.Initialize(AnimationTimeline);
USUndoManager.RegisterCompleteObjectUndo(USHierarchy, "Add New Track");
USHierarchy.RootItems.Add(hierarchyItem as IUSHierarchyItem);
if (AnimationTimeline.AnimationTracks.Count == 1)
{
IsExpanded = true;
}
}
