cmm@creare.UUCP (Chris Morley) (01/09/90)
Hi - I'm implementing a solid modelling system using non-uniform rational b-splines, and need to take derivatives of these curves & surfaces for various reasons. The straight forward approach of applying the quotient rule to the definition of rational curves produces a pretty horrible result - does anyone know of faster/easier algorithms to do this? Thanks for any help you can offer - Chris Morley ...dartvax!creare!cmm ps - is anyone else out there using nurbs for anything interesting?