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From: crum@alicudi.usc.edu (Gary L. Crum)
Newsgroups: comp.sys.sgi
Subject: environment mapping with Silicon Graphics IRIX 3.3.2 GL
Keywords: Silicon Graphics VGX, environment map, texture, texgen, TG_SPHERICAL
Message-ID: <33320@usc>
Date: 4 Jun 91 05:15:14 GMT
Sender: news@usc
Organization: University of Southern California
Lines: 14
Nntp-Posting-Host: alicudi.usc.edu

Quick:  Is it possible to compile a program using IRIX 3.3.2 GL that
uses the "environment mapping" (a.k.a. "reflection mapping",
a.k.a. "spherical texture mapping", I think) capabilities of Silicon
Graphics VGX hardware?

Do I need only know the token value for TG_SPHERICAL to use with the texgen()
call?  That token isn't defined in my 3.3.2 gl.h file.

I wonder if the /usr/demos/bin/envmap binary was produced using pre-4.0 IRIX.

I am going to ask Silicon Graphics about this tomorrow, but it's often
quite instructive to ask USENET about these things.  Thanks!

Gary