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From: Jason Kraftcheck (kraftche_at_[hidden])
Date: 20061108 12:06:21
Jason Hise wrote:
> I did something very much like this a while back, which was submitted
> as a potential jumping off point for a boost geometry library. It is
> in the boost vault under Math  Geometry (http://tinyurl.com/ymjsoz),
> along with two other submissions. (Mine is geometryJH_01.zip).
>
I looked at your matrix implementation briefly, and have a few suggestions:
o specialized implementations of inverse and determinant for common sizes
(2x2, 3x3, maybe 4x4) will probably give better performance.
o I got substantially better performance for matrix multiplies by
explicitly unrolling the innermost loop. but I only tested on one
platform, so that my not be a universal improvement.
I think that if Boost includes such a matrix implementation, it should be in
some general math primitives library, because it is applicable to more than just
geometry.
I think that my design of the matrix class is a little better because a vector
is defined as a Nx1 matrix, rather than the matrix being defined as an array of
vectors. This avoids the need for special operators for vectormatrix
multiplication, is closer to the underlying mathematical concept, and makes the
equivalency of a vector and column matrix explicit.
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