Path: utzoo!utgpu!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!agate!bionet!apple!rutgers!mit-eddie!bu-cs!purdue!decwrl!sgi!dunlap@bombadl.SGI.COM
From: dunlap@bombadl.SGI.COM (D. Christopher Dunlap)
Newsgroups: comp.sys.sgi
Subject: Re: videotaping from the iris
Summary: quick note...
Message-ID: <21706@sgi.SGI.COM>
Date: 7 Nov 88 18:37:29 GMT
References: <8811020355.aa14353@SPARK.BRL.MIL> <1173@client2.dciem.dnd.ca>
Sender: daemon@sgi.SGI.COM
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 27

In article <1173@client2.dciem.dnd.ca>, king@client2.dciem.dnd.ca (Stephen King) writes:
> In article <8811020355.aa14353@SPARK.BRL.MIL> phil@BRL.MIL (Phil Dykstra) writes:
> > [...] You get the lower left hand corner of the screen
> >(~640x480 pixels).
> 
> I must confess, I am somewhat confused by this. Admittedly, we have not run
> our IRIS at NTSC rates for some time, but I am sure that such S/W as the
> ARCH demo produced a full screen. Could it depend on the model ? (ours is
> an old 2400)
> 
> -- 
>   {utzoo|mnetor}!dciem!zorac!dretor!king  or  king%dretor@zorac.dciem.dnd.ca
>   Stephen J King   =-=   DCIEM Human Factors Division   =-=   (416) 635-2149


It's the software. Has to do with the projection of the 3D objects
onto the screen space. If you only switch to NTSC, then you get the
"lower-third-of-the-screen" phenomenon. If you do a complete job with
the software, then you get a correct image, just lower resolution. 
I'll have one of the Graphoids post a followup with more detail.

chris


D. Christopher Dunlap

Hardware Product Support
Silicon Graphics