[ODE] Particle/cloth/skeleton (was: Re: Choleski factorization)

[david@csworkbench.com]

Well, the iterated solver is basically finished, but I was hoping to get
an answer from Russ about changing the order of contact constraints and
whether that will mess anything up in the old solver first....  In the
meantime, I'm testing some SIMD functions in the worst sections of the
algorithm, to see if I can eek out just a tad more speed from it.  I'm
also performing some tests to make sure I didn't break anything (like
adding arbitrary forces each timestep).

David

>> SIMD: I wasn't considering rewriting all of the code with SIMD
>> alternatives, but just rewriting Vector and Matrix multiplication and
>> dot product functions with a SIMD alternative.
>
> I've always wondered if it would make any sense to use Windows' Direct3D
> vector and matrix operations on Win32 platforms.  If they by chance use
> SIMD instructions etc, you'd get that for free, and in the distant
> future, when the Pentium XXIV has single-cycle matrix multiplies, you'd
> get that for free with no code changes.
>
> Just a thought.  I'm giddy with anticipation wrt the iterated solver!
> Thanks for the hard work David!
>
> --
> Gary R. Van Sickle
> Brewer.  Patriot.
>
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