[negfrequency]

alright i admit that explanation was rather lame.

transitional constraints allow an object to roll or follow a surface, kind of like how you shift from second to third in a standard car. The stick being one object, the track being the other.

by creating a chain, you are making several pieces that can bend on only one plane. constraining this chain to an extruded suface shaped similar to a belt with transitional constraints allows this chain to "roll" along the surface in a continual circle.

As far as i can tell, the large downside of this is the actual construction of the chain itself. Even with iMates, the file size can get annoyingly large and laggy if you dont have an average computer (yea mines below average).

if i get the chance, i will post a picture of this sometime.