Best way to draw circle!!??

I'm creating mod's for this game and I need to know some things about 3D math...

TRIGONOMETRY

namely, the best way to draw a CIRCLE in a 3D game --

Is it just a rotation about the X axis?? or is there a better way..

If it is a rotation can u give me the best way as I would have to create a loop and calculate for 360 degrees or do I have to even do more than 360 calculations to make it more beleivable??

These links will help what I'm talking about -- the 2nd deals more with the actual game im working with.

Basic 3D math

http://toadlife.net/ofp/downloads/tu...trigguide.html