RE: [Algorithms] Flipped UV coordinates and bump mapping

[Tom F. <tom...@ee...>]

Converting a quaternion to a 3x3 matrix isn't crazy in a VS - I believe some
people do exactly this for skinning so they can store their bones as quats.
And that's the same opertaion - a 3x3 matrix is the normal, tangent and
binormal vectors. If you are limited by the memory size of your vertices,
but have lots of vertex-shader power available (for example, on consoles),
then it's definately worth looking at.

TomF.

> -----Original Message-----
> From: gda...@li... 
> [mailto:gda...@li...] On 
> Behalf Of John Paquin
> Sent: 29 June 2004 11:30
> To: gda...@li...
> Subject: Re: [Algorithms] Flipped UV coordinates and bump mapping
> 
> 
> David Whatley wrote:
> 
> > moment).  Exotic solutions include storing the tangent space as a 
> > quaternion.
> 
> 
> hmmm, that's interesting.  That would allow for all sorts of 
> things.  I 
> bet the vs code for this is u.g.l.y. though.  Has anyone 
> implemented it?