From: Phil Keslin (philk++at++cthulhu.engr.sgi.com)
Date: 02/02/2000 08:49:19
Intensity textures should work on OCTANE. They don't work on the Indigo2
version though.
- Phil
Angus Dorbie wrote:
>
> I thought you'd said you used a different internal format in your post.
>
> An ALPHA texture will obviously modify the alpha component of the
> fragment but the main difference between an INTENSITY texture and a
> LUMINANCE texture is their behaviour w.r.t. the fragments alpha value.
>
> If you need this bahaviour on IMPACT you can work around the limitation
> by using LUMINANCE_ALPHA texture instead of the single component texture
> formats.
>
> CHeers,Angus.
>
> ramey wrote:
> >
> > Well I solved my own problem, thanks to those who commented though. The
> > real problem is that GL_INTENSITY and GL_ALPHA just are not supported on
> > an impact. This is not documented anywhere I found in performer but in
> > reading over some of Mark J. Kilgards code he had a comment to himself
> > about this. So I took by code over to our Origin2000 with and IR and low
> > and behold, I had everything right the first time around.
> > --
> > "Haven't you heard? We come in six packs now." -Zaphod Beeblebrox
> > Larry E. Ramey
> > ramey++at++de-solutions.com
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> --
> For Performer+OpenGL tutorials http://www.dorbie.com/
> My comment on the abuse of Jon Johanson's rights;
> After giving up raiding their neighboring countries the Norse men
> have taken to raiding 16 year old kids in their bedrooms. Very sad.
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-- Phil Keslin <philk++at++engr.sgi.com>
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