Re: [Boost-users] NURBS curves/surfaces

Hello, as far as I know Blender has a NURBS-library based on NURBS++ (or Nurbana?), maybe It is possible to start from there, just thinking aloud... -------- Original-Nachricht --------

Datum: Sun, 8 Feb 2009 11:23:15 +0000 Von: Peter Barker An: boost-users@lists.boost.org Betreff: Re: [Boost-users] NURBS curves/surfaces

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We have the same interest and need for boost. What applications do you plan to use NURBS?

B/Rgds Max

Hi Max,

I currently work for a CAD company in the footwear industry and our curves/surfaces are implemented using splines from code home-grown in the 70s. Manning and/or Ferguson I believe they're called. This is making interchange between other CAD applications difficult. If our company used NURBS internally it would help.

There is a project called Nurbs++ (http://sourceforge.net/projects/libnurbs/) but it's not seen any activity for almost 7 years. I've looked at the code and it's not the best. Header files including .cpp files and other strange stuff. Trying to get it compiled and link with it means rewriting a lot of the code.

There is a commercially available library called NLib available from Solid Modeling Solutions (http://www.smlib.com/nlib.html). It's quite pricey to buy.

The NURBS Book (http://www.amazon.co.uk/Nurbs-Book-Monographs-Visual-Communication/dp/3540615458/ref=sr_1_1?ie=UTF8&s=books&qid=1234091419&sr=8-1) contains a lot of maths and pseudocode for NURBS algorithms. These algorithms are what NLib is based upon, but the latest NLib has more functionality I understand. The authors of this book are the original authors of NLib before Solid Modeling Solutions bought the rights to the library.

Currently the book is far beyond me mathematically! I'm making a real effort to learn maths so implementing the algorithms from the book might be a good exercise. Then again it might be something I will never finish.

Have you done much research on what's available? Would be interested in hearing what paths you're looking at taking.

Regards,

Pete _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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