Re: IR./PF support for index or palette texture

Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Tue, 25 Feb 1997 08:17:03 +0000

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You mean 8 bit giving 256 entries.

> texture and have also seen the palette texture extension for OGL. Does

I think this is only implemented in Cosmo OpenGL, (the recently available
software only pentium PC OpenGL 1.1 implementation for Windows ), at this
time.

> anyone have any suggestions for how I can activate this mode and animate
> my texture based palette etc. on an IR.? Thank You.
>

You have several options.

You could use an intensity map and use a colour look up table but you
may encounter interpolation problems if you use mipmapping of bilinear
filtering due to the lookup happening after the texture interpolation.

You could story the animation in texture memory and use a different
texture each frame, you have a lot of texture memory on iR.

You could download one texture image from an animated sequence each frame
each frame and store the animation in system RAM, you have a lot of
bandwidth to texture memory on iR.

Cheers,
Angus.

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