Re: Infinite Reality, Colour matrix and pfTexEnv Component

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Wed, 22 Jan 1997 11:51:44 +0000

On Jan 22, 10:02am, Graham Jones wrote:
> Subject: Re: Infinite Reality, Colour matrix and pfTexEnv Component
> Thanks to those who replied to my question (Ran, Brian and Angus)
>
> Ran Yakir wrote:
> > Color matrix (and also colour matrix) can be applied to texture loads
> > on InfiniteReality, Impact and O2. On RE, RE2 and VTX it is applied
> > only to pixel transfers (glCopyPixels, glDrawPixels).
>
> Would I be right in thinking that, on InfiniteReality, the colour matrix
> is not applied when an object is rendered with a texture, but only when
> the texture is sent to the hardware then?

Yes.

>
> 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.

Cheers,
Angus.

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