2009

The structure on the left has the arms and torso linked to the neck. The
structure on the right links the arms and neck to the torso, a more realistic
approach.
WARNING Be sure to avoid using non-uniform scaling on objects in a hierarchy
that will be animated using IK. You will see stretching and skewing if you do.
Instead do all non-uniform scaling at the sub-object level, to avoid this problem.
Use Reset XForm if you have objects that exhibit this behavior.
Linking Objects After Animation
When you link an object to another, the link relationship between the child
and its parent is determined by the position, rotation and scale of the parent
and child objects when the link is made.
Imagine linking a stationary sphere to an animated box.
■ At frame 0 the box is beside the sphere.
■ At frame 50 the box is 20 units away.
Original animation, with ball unlinked and stationary while the box moves.
Hierarchies | 3339