🚀 go-pugleaf

The following are a couple of irritatingly specific GL questions,
primarily directed towards the GL development engineers at SGI:

FIRST QUESTION:

I'm guessing it's not possible right now, but it seems to me that it would
be really nice to somehow automatically generate high-frequency noise.

This would allow you to get close to textures (even low-resolution ones)
without getting the annoying "out-of-focus" viewer phenomenon.

Someone said that there are plans for allowing for combinations of two
textures at the same time.  Is this true?  This would be a nice general
solution for the high-freq noise problem and would also work well for
times when you want to have (for example) a shiny reflection-mapped wooden
sphere.

SECOND QUESTION:

Is there anyway to do TX_POINT texture interpolation on the alpha channel
(I want 0's and 255's, but nothing in-between) and TX_BILINEAR interpolation
for RGB components of a texture map?  I'm generating a field of trees using
tree textures mapped onto polygons.  I'm using afunction() to disable the
drawing of pixels with alpha of zero.  (Please don't tell me to sort the 
forest in back-to-front-order -- that's cheating!)

It would be nice if you could do a afunction(255,AF_EQUAL) or
afunction(0,AF_GREATER), but you can't.  The only real options
are afunction(0,AF_NOTEQUAL) (don't draw 0-alpha pixels) and
afunction(0,ALWAYS) (the default).


Thanks a million-lighted-z-buffered-textured-polygons-per-second,

Narret J. Nalyob


P.S.  Still waiting for the hardware support for FFD's (Or was it
FFT's?), jpeg_lrectwrite(), and Phong-shaded bump-maps.  ;^)

-- 
Terran J. Boylan, Sr. Artist/Programmer | "It's better to have loved
Engineering Animation, Inc.,  Ames, IA  | and lost than just to have
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