Bjørn Blaabjerg Sørensen shows how to write a script that can constrain an object to any polygonal surface in Maya. Bjørn has been posting some tutorials recently on using Python in Maya for simple rigging tasks.
using Maya Python to demonstrate how you can write a very useful tool for rigging
Here, he shows how you can make a follicle connection script, that will constrain any 3D object to any polygonal surface.
The resulting tool can be used in a variety of rigging tasks, such as sticking a button on a character’s clothes, or eyebrows to a face — you can use it any time you want something to stick to a surface without rotating in strange ways.