Re: Infinite Reality, Colour matrix and pfTexEnv Component

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Graham Jones (graham.jones++at++sharp.co.uk)
Wed, 22 Jan 1997 16:40:47 +0000

Angus Dorbie wrote:
>
> On Jan 22, 10:02am, Graham Jones wrote:
> > So I wouldn't be able to render the same object three times with
> > three different colour matrices without downloading the texture
> > three times (I'm trying to avoid all that data flying around the
> > place).
>
> You want to use glColorTableSGI for this kind of thing.

Angus,

I could be barking up the wrong billboard but from a read of the manual
and book on the colour table extension it would appear that I wouldn't
be able to map Green to Red (for example), as I would if the colour
matrix worked for texturing operations, but only remap, say, Green to a
different Green.

Useful as the extension may be I don't think I quite does what I need -
please correct me if I'm wrong.

Presumably if I can get the QUAD_TEXTURE_SELECT extension working for me
and it extracts a component as an intensity texture, the extracted
texture will render in to R, G and B.

Graham.
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