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#5 Raytrace Issue
I had the systems administrator load BRL-CAD 7.6.4 on
one of our 8 node linux servers running Red Hat
Enterprise Linux AS release 3 (Taroon Update 6). My
client is a Dell PC (Windows XP) running X32 version
6 Build 1. Since BRL-CAD is new, I have been running
the tutorial in volume II. In lessons 4 and 5, it
appears the raytrace does not work since, nothing
appears to be happening when I press the button. I
have tried to change the background but again, it
appears nothing happens in the GUI window. The
command line window states "..RayTracing Complete" or
something along those lines. Please help.
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There could be several causes for what seems to be "nothing happening" in
the GUI window. Start out with a quick test of the raytracer by itself first,
going to a plain X11 window. Run this in the mged command window:
rt -F/dev/Xl -s800
(That's dev ex-ell, not dev ex-one)
That rt line should render to an 800x800 lingering X11 framebuffer window.
If it does work, try this next:
rt -F/dev/ogll -s800
That should render to a lingering OpenGL X11 framebuffer window. The
mged graphics window is OpenGL by default for 7.6.4 under Linux, so I
suspect that's what's failing. There can, however, be many causes for it to
fail.
Let me know how those two tests turn out. If anything, the first should
provide a means forward while the issue can be looked into. If either fails, it
would also help if you run "fbhelp" from outside of mged and provide the
output here as well.
Cheers!
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Thank you for all of your help. The rt -F/dev/Xl -s800
worked. Attached please find the bmp file with that
rendering.... apparently the ogll (Open GL) did not work.
Attached you will find another file that has that
rendering. It had the framebuffer with no object in it.
I ran fbhelp and included it as well in the Wordpad file.
The Wordpad file provides the response with each entry
after it ran. I also ran ./sierpinski3d with response
Xlib: connection to ":0.0" refused by server, Xlib: No
protocol specified but it renders the 3d screensaver.
I would appreciate any suggestions or fixes that you may
have. I am not very Open GL savy...
Thanks and Cheers,
James
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I could not include the two bmp files...
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When I started looking around on the server, I discovered
that the OpenGL libraries were missing. Once they were
downloaded from MESA at this site... the tool works great.
Thanks for pointing me in the right direction.
Regards,
James
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Glad to hear it was able to be resolved! Please feel free to report any other
issues, bugs, or feature requests that come to mind.