[Bf-committers] GSOC - Math Library Project
Campbell Barton
ideasman42 at gmail.com
Sat Mar 29 16:46:28 CET 2008
On Sat, Mar 29, 2008 at 3:57 PM, Konstantinos Margaritis
<markos at codex.gr> wrote:
> On Σαβ 29 Μαρ 2008, Daniel Barbeau wrote:
> > Hello,
> >
> > Has there been any investigation to find out if this wouldn't be
> > duplicating efforts? I think there are already some libraries out
> > there. Such an approach has the big advantage of not duplicating
> > efforts. Relying on a third party library does create some
> > trouble, but it has the big advantage of not creating fresh
> > untested code.
> >
> > I'm thinking of Blitz++ or GSL.
> > http://www.oonumerics.org/blitz/
> > http://www.gnu.org/software/gsl/
> >
> > Blitz++ has a reputation of being fast by using templates. There
> > already are C++ libraries in Blender. Blitz++ could be part of it
> > no in the "lib" directory? It seems to be stable so you would need
> > to sync every month with the main code.
>
> How would you use C code with a C++ template library? Blender renderer
> (which is the time consuming module) is written in C, Blitz++ is
> written in C++.
>
> Personally, I would choose SIMDx86 (http://simdx86.sourceforge.net),
> which provides optimized versions of each arch (SSE/3dNow, and I'm
> working on the AltiVec/Cell parts myself, check
> http://freevec.org/category/simd/algorithms/algebra/matrix_multiplication)
> and includes both C and C++ interfaces, but that would require a
> fundamental change in Blender. Such a thing has been discouraged
> (from discussions in #blendercoders), so unless you're prepared to
> redo most of Blender code only to have a rejected patch of ~3MB, I'd
> suggest you help in reworking the existing infrastructure instead.
> Same goes for GSL and other math libraries.
>
>
> --
> Konstantinos Margaritis
> CODEX
> http://www.codex.gr
> markos at codex.gr
>
GSL only has matrix and vector functions, the matrix functions use a
gsl_matrix struct that has stuff blender dosnt need in it. and there
are no quat/euler rotation support.
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