Good quaternion (math) library

[{MSX}]

Hi all! i'm looking for a good unit that implement common 3d math data structure and operation.
In particular i'm looking for quaternion implementation. I've found some but no one seem to be complete..

Thanks for help!

[lucky]

GlScene's Geometry.pas units has several procedures dealing with quaternions, I haven't used them in detail myself though.
Just a pointer, not sure if it is what you need.

luck