Re: [boost] Geometry/Vector Lib

From: Olivier Grant (olivier.grant_at_[hidden])
Date: 2006-09-21 10:11:01

Hi,

I would like to read the thread you're talking about, but I can't seem to
find it. Would you have a direct link or its name ?

Thanks,

Olivier.

On 9/21/06, Martin Slater < mslater_at_[hidden]> wrote:
>
>
> > created. The other advantage is that the resulting assembly code is just
> as
> > fast as if the functions had all been explicitly written.
> >
>
> even if that assembly is optimised sse?
> >    vector2d v1(1.0f, 2.0f);
> >    vector3d v2(-1.0f, 3.0f, 2.0f);
> >    vector4d res;
> >
> >    vector_add(v1, v2, res);
> >    /* res now contains (0.0f, 5.0f, 2.0f, 1.0f) */
> >
>
> I've been bitten too many times using a library that does just this, if
> I want to change a n dimensional vector to any other dimension the added
> values should be explicitly provided.   Optimised versions that
> implicitly assume a value should be named accordingly so their use is
> obvious. Also using a c style interface to make the actual maths even
> more impenetrable seems like a bad idea.
>
> There was a very long discussion about a vector library aimed towards
> game development on the sweng mailing list recently
> (http://lists.midnightryder.com/pipermail/sweng-gamedev-midnightryder.com/
> )
> which you may find useful.
>
> cheers
>
> Martin
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