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

[gl]

I should also mention that you would also automatically get support for
AMD's 3DNow.
--
gl

----- Original Message -----
From: "gl" <gl@ntlworld.com>
To: <ode@q12.org>
Sent: Monday, March 24, 2003 11:13 AM
Subject: Re: [ODE] Particle/cloth/skeleton (was: Re: Choleski factorization)


> > 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.
>
> Be nice for all us win guys, that's for sure : ).  There is some processor
> specific optimisation going on in D3DX (the DX utility library that
provides
> quat, matrix and various vector classes/functions, amongst others), and
yes,
> you do get it transparently and its updated over time.  Using that library
> doesn't tie you to any other parts of DX in any way (eg. there are no
> rendering dependencies).
>
> It's not clear though exactly what they've optimised - their vec3
> equivialent doesn't use padding, so they probably only accelerate a few
> complex operations.  Matrices should be (you can use an aligned version),
> not sure about quats.  They do intend to keep adding optimisations in key
> areas though.
> --
> gl
>