nurbs and curves modeling

Can anyone point me some good link to nurbs-related stuff? I’m trying to do curved surfaces modeling, and I figured out how to use bezier patches but I soon stopped. How can I model a spike with bezier patches? Or a morphable sphere? I tried, but I think it’s not possible because I need more control points to keep continuity on the edges. I’d like math stuff too. I looked around but I only found notes about bezier curves and just some cryptic hint about nurbs. Thanx!

Hey, noone know some good stuff about this ?

I may suggest you to go for Gerald Farin’s book “Curves and Surfaces in CAGD”. It is one of the best textbooks in the area. G. Farin’s home page is:

Hope this helps

Hi Martin,

By the way witch is the meaning of CAGD ???

Best regards