Newsgroups: comp.sys.sgi
Path: utzoo!utgpu!news-server.csri.toronto.edu!me!ecf!xiaoyan
From: xiaoyan@ecf.toronto.edu (Yan Xiao)
Subject: Re: Stereo sync
Message-ID: <1990Dec3.200040.27633@ecf.utoronto.ca>
Keywords: stereo
Sender: news@ecf.utoronto.ca (News Administrator)
Organization: University of Toronto, Engineering Computing Facility
References: <17848@thorin.cs.unc.edu> <1990Nov30.172515.26299@ecf.utoronto.ca> <17895@thorin.cs.unc.edu>
Date: Mon, 3 Dec 90 20:00:40 GMT

In article <17895@thorin.cs.unc.edu> certain@hatteras.cs.unc.edu (Andrew Certain) writes:
>
>We have a passive-glass system, so that there is a plate that we put in front
>of the monitor which polarizes the light coming from the screen, switching
>directions at 60Hz.  The glasses are just polarized lenses so that each eye
>only gets light every other cycle.  So I need to know when the buffers have
>swapped (and, hence, the plate has flipped eyes), so that I can start drawing
>the other eye.
>
>Andrew

I don't quite understand your system.  Can't you just draw two dots on
the screen, each representing an eye's view?  Whenever the buffer swaps,
you light up a cooresponding dot?

xiao