Depth-map textures on IR

New Message Reply Date view Thread view Subject view Author view

Robert Doyle (doyle++at++coralsea.ait.nrl.navy.mil)
Fri, 4 Apr 1997 13:31:50 -0500

I posted the following question to the Open_GL newsgroup and received several
commiserations from people who suffered the same problem but no solutions. The
OpenGL calls are made in a Performer draw callback so perhaps some Performers
have experience with the problem:

The use of:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_SGIX, GL_TRUE) on our Onyx1
Infinite Reality (patch 1699) causes a screen freeze followed by a system
crash. The machine supports GL_SGIX_shadow_ambient, GL_SGIX_shadow, and
GL_SGIX_depth_texture. Is anyone aware of a patch or a workaround to avoid the
problem?

The problem can be duplicated with shadowmap.c found at
http://www.sgi.com/Technology/openGL/advanced/programs.html. The typo in line
363: strstr(extensions, "GL_SGIS_depth_texture")) needs to corrected, however.

Thanks,
Bob Doyle

-- 
=======================================================================
List Archives, FAQ, FTP:  http://www.sgi.com/Technology/Performer/
            Submissions:  info-performer++at++sgi.com
        Admin. requests:  info-performer-request++at++sgi.com

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:55:01 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.