Just a little addition:
For all programming in 3D which didn't have the needed math already in college, I can really advice the book "3D Math Primer for Graphics and Game Developement" by Dunn & Parberry.
It covers most of all common math you need for 3D dev
@halo: You still have not really answered the question at the top but that is normal as you ignore me. On the other hand you should already know the answer as you wrote a map exporter for CS and texture coords in map format are familiar with what you are asking for here.
For all programming in 3D which didn't have the needed math already in college, I can really advice the book "3D Math Primer for Graphics and Game Developement" by Dunn & Parberry.
It covers most of all common math you need for 3D dev
@halo: You still have not really answered the question at the top but that is normal as you ignore me. On the other hand you should already know the answer as you wrote a map exporter for CS and texture coords in map format are familiar with what you are asking for here.