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From: thant@horus.esd.sgi.com (Thant Tessman)
Newsgroups: comp.sys.sgi
Subject: Re: Graphics library examples
Message-ID: <5074@odin.SGI.COM>
Date: 9 Mar 90 15:47:03 GMT
References: <9003082054.aa06458@VMB.BRL.MIL>
Sender: news@odin.SGI.COM
Reply-To: thant@horus.esd.sgi.com (Thant Tessman)
Organization: Silicon Graphics, Entry Systems Division
Lines: 37

In article <9003082054.aa06458@VMB.BRL.MIL>, butler@BRL.MIL ("Lee A.
Butler") writes:
> This evening I sat down at the IRIS to start learning to use the graphics
> library. On page 1-5 of the "Graphics Library Programming Guide" is the
> program "red.c" which I typed in verbatim:
> 
> #include <gl/gl.h>
> 
> main()
> {
>         prefposition(100, 500, 200, 600);
>         shademodel(FLAT);
>         winopen("red");
>         color(RED);
>         clear();
>         sleep(5);
> }
> 
...
> 
> I noticed that if you leave out the call to "shademodel" the program works
> as advertised.
> 
> Lee A. Butler
> SLCBR-VL-V					Internet: butler@brl.mil
> Ballistic Research Laboratory			   Phone: (301) 278-8740
> Aberdeen Proving Grounds, MD 21005-5066

There is an error in the program.  The 'winopen' needs to happen
befor the 'shademodel' command.  I think (hope) the manual has been 
fixed by now. 

Some commands (like prefposition) are hints, and go before the
winopen.  All the rest need to happen after the graphics have 
been initialized.

thant