Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cunixf.cc.columbia.edu!shenkin
From: shenkin@cunixf.cc.columbia.edu (Peter S. Shenkin)
Newsgroups: comp.graphics.visualization
Subject: Re: Crystal Eyes
Message-ID: <1990Nov15.163535.9115@cunixf.cc.columbia.edu>
Date: 15 Nov 90 16:35:35 GMT
References: <1990Nov14.201940.23433@batcomputer.tn.cornell.edu> <1185@red.qtp.ufl.edu>
Organization: Columbia University
Lines: 35

In article <1990Nov14.201940.23433@batcomputer.tn.cornell.edu> andyrose@batcomputer.tn.cornell.edu (Andy Rose) writes:
>
>... I heard (SIGGRAPH) that powerstation SGIs have been shipped with
>stereo ready monitors for some time now.  I think that means they 
>can display 120HZ.

The way SGI's stereo-ready monitors work is that in stereo mode, the "upper 
half" of the raster gets displayed not on the upper half of the screen but
rather interlaced with the lower half.  Thus, if the screen only had 8
raster lines the display would put them out as follows in stereo and
mono mode:

	mono	stereo
	0	0
	1	4
	2	1
	3	5
	4	2
	5	6
	6	3
	7	7

Thus, you lose half your vertical resolution in stereo mode, but the screen
refreshes at the same rate.  An IR LED emitter sends signals to a receiver
in the goggles to sync liquid crystal shutters in the goggle lenses with the
refresh rate.  

I have this on my personal iris, and I love it.  It does work with anti-
aliasing.

	-P.
************************f*u*cn*rd*ths*u*cn*gt*a*gd*jb**************************
Peter S. Shenkin, Department of Chemistry, Barnard College, New York, NY  10027
(212)854-1418  shenkin@cunixc.cc.columbia.edu(Internet)  shenkin@cunixc(Bitnet)
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