I'm afraid I just don't have the background to
understand this yet. But I have need to know
the angles for x,y and z of a tangent to a sphere
that has been rotated on all axes. From what I
have read, quaternions are the answer to this.
Could someone point me to a way to implement
this in Pov? Maybe someone has already made
a set of macros?
Thanks for all your kind help!
=Bob=
