[ODE] More speed???
Aras Pranckevicius
nearaz at interamotion.com
Wed Nov 5 12:55:36 MST 2003
> The "system" is LCP A*x = b+w with certain conditions. Solve such
> system require many math skills (which I don't have :( ), you can
> read the famous Barraff's paper about it.
Ah, right... I got confused by those extra conditions :)
> 2) Change it-> use iterative methods : theoritically faster
> but may break ODE stability. (But actually, I prefer this way)
If that's plain Ax=b, some sort of Conjugate Gradient might actually be
better. For CG, A must be symmetric and positive definite (I don't know what
that means :)), though. If A is also sparse, that can be exploited
efficiently.
Some nice stuff for all kinds of these things is in Iterative Template
Library - http://www.osl.iu.edu/research/itl/ and Matrix Template Library -
http://www.osl.iu.edu/research/mtl/
Aras Pranckevicius aka NeARAZ
http://www.gim.ktu.lt/nesnausk/nearaz/
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