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From: sabbagh@acf5.NYU.EDU (sabbagh)
Newsgroups: comp.sys.sgi
Subject: Re: Reply to "I think I'm going to go insane!"
Message-ID: <1611@acf5.NYU.EDU>
Date: 6 Jun 91 19:22:22 GMT
References: <9105311806.AA22621@mwunix.mitre.org>
Organization: New York University
Lines: 40

m19730@MWVM.MITRE.ORG ("Carla X. Gladstone") writes:

>Ranjan, Even though I don't have C++ experience on the iris, I do know what
>ERR_BADWINDOW signifies: it usually means that when calling ortho one or more
>of the left-right, bottom-top, or near-far pairs has been switched.

>There exists a list from the SG Customer Support Division which gives a
>cryptic listing of all the GL error messages.  I recommend trying to get hold
>of a copy.
>*                                                               *
>|      Carla                                     (703) 883-6861 |
>*---------------------------------------------------------------*

This is usually the problem when calling from C, but from C++ the real
problem is that you must provide

	-acpp -prototypes

as flags to CC (which then passes them on to cc).

There are some ramifications once you start doing this, which you must do
for all C++ programs. I have found that iostream operators break with
floats; you must cast them to double like this:

	float aFloatVar = 1.0e0;
	cout << (double) aFloatVar;

I believe that you must recompile the libraries when you have provided
these flags.

Hadil G. Sabbagh
E-mail:		sabbagh@cs.nyu.edu
Voice:		(212) 998-3125
Snail:		Courant Institute of Math. Sci.
		251 Mercer St.
		New York,NY 10012

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