internal Influence? TransformFor(Bone b)
{
var track = coreAnimation.GetTrack(b.CoreBone);
return (track != null && weight > 0)
? new Influence(weight, track.GetTransformAt(time))
: default(Influence?);
}
internal IEnumerable<Influence> GetInfluencesFor(Bone b)
{
return animations.Select(x => x.TransformFor(b)).
Where(x => x != null).
Cast<Influence>();
}