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From: thant@horus.esd.sgi.com (Thant Tessman)
Newsgroups: comp.graphics
Subject: Re: SGI NTSC Mode
Message-ID: <1990Oct11.154921.20677@odin.corp.sgi.com>
Date: 11 Oct 90 15:49:21 GMT
References: <12000@medusa.cs.purdue.edu>
Sender: news@odin.corp.sgi.com (Net News)
Reply-To: thant@horus.esd.sgi.com (Thant Tessman)
Distribution: usa
Organization: Silicon Graphics Inc.
Lines: 24

In article <12000@medusa.cs.purdue.edu>, bouma@cs.purdue.EDU (William J.
Bouma) writes:
> Help, can someone tell me how to throw a personal iris into NTSC
> monitor mode?  There is a function called "setmonitor" which is
> supposed to do this, but it either core dumps or gives an error
> whenever I call it.  What the crap is "immediate mode" on an iris
> anyway?  The manuals with this machine are junk! Thanks.


Immediate mode means not within a display list.  (See 'makeobj,' etc.)
Historically, people are used to thinking about computer graphics
in terms of display lists.  Hence the note about "immediate mode."

This is just a guess, but:

Most graphics commands need the graphics initialized.  The way to
initialize graphics is to open a graphics window with the 'winopen'
command.  If you want to use gl commands without actually opening
a window, for example to change monitor modes or the colormap, 
precede the 'winopen' with a 'noport.'

Hope this helps,

thant