Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!isl1.ri.cmu.edu!cycy
From: cycy@isl1.ri.cmu.edu (Scum)
Newsgroups: comp.sys.sgi
Subject: Re: Another SGI graphics problem/solution to last one
Summary: that's it!
Message-ID: <7269@pt.cs.cmu.edu>
Date: 8 Dec 89 07:46:59 GMT
References: <7254@pt.cs.cmu.edu> <45948@sgi.sgi.com>
Organization: Carnegie-Mellon University, CS/RI
Lines: 45

In article <45948@sgi.sgi.com>, tarolli@riva.esd.sgi.com (Gary Tarolli) writes:
> In article <7254@pt.cs.cmu.edu>, cycy@isl1.ri.cmu.edu (Scum) writes:
> > We want to use dgl (Distributed Graphics Library) and have things appear
> > on another monitor's screen. That works; however, on the local screen there
> > is a problem with lighting in one of the windows, and it's pretty weird. The
> > objects appear, and they appear in the correct material colour. However, the
> > lighting model or the lights seem to be screwed up. The objects are just
> > coloured flat now. No shadows, no shading, no perspective, nothing. This worked
> > in gl, but it seems there is something missing in dgl. By the way, normals are
> 
> I think you stumbled across one of the commands that behave slightly differentlyin the GL than in the DGL.  The command is lmdef, and the GL ignores the third
> parameter whereas the DGL requires it. People normally, by habit, put 0 as 
> the 3rd parameter and the GL works fine.  If you read the man page , the 3rd
> parameter is supposed to be the number of floats in the 4th argument.  The
> DGL looks at this value to determine how many floats to send.  Thus if you
> are like most people and set it to 0, the DGL will send 0 floats and thus

> Check the 3rd parameter and make sure it is set correctly, that should fix
> your problem.
> 						Gary Tarolli

That was it! Actually, I had miscounted the parameters (I skipped a line in
when I was counting the elements in the array) and had used 10 instead of 14
for the third parameter. Thanks a million!!!!!!!!!

					-- Chris.
















-- 
					-- Chris. (cycy@isl1.ri.cmu.edu)
"People make me pro-nuclear." -- Margarette Smith