what do you want to use them for exactly - they fit many purposes.

if you point me to the doc, i will explain.

i guess you're interested in the 3D stuff, right? - the

wikipedia article gives a good introduction. come back with more concrete question and we will see

i also thought about the camera path - you will have to work with the partial derivatives. derivatives of polymones and sine/cosine aren't quite hard, but it's still a lot of math. I don't find too much time and pleasure in delving into math these days ...but i'm subconsciously working on it