Get the current positions of the transformation hierarchy fromTargetDeformationSkeleton_, deformed by the tetrahedral mesh. Results can be in world space postions/deltas, component space positions/deltas, or bone space positions/deltas. If a bone space is desiredTargetBone_ must indicate which bone to use. TargetDeformationSkeletonOffset is an offset transform that moves the `TargetDeformationSkeleton_ to be co-located with the flesh mesh.