Path: utzoo!attcan!uunet!ogicse!milton!mkwan@mullauna.cs.mu.OZ.AU
From: mkwan@mullauna.cs.mu.OZ.AU (Matthew Kwan)
Newsgroups: sci.virtual-worlds
Subject: Re: Stereoglasses, active technology
Message-ID: <7649@milton.u.washington.edu>
Date: 16 Sep 90 07:11:02 GMT
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cphoenix@csli.Stanford.EDU (Chris Phoenix) writes:

>>It was running off a Personal Iris with a special 3-D adaptor. Basically
>>you draw the left picture in the top half of the screen, the right in
>>the bottom, and the hardware does the rest.

>You mean that if you looked at the screen without any glasses you'd see 
>a picture on the top half of the screen and a different version of it on
>the bottom half of the screen? 

Sorry if I didn't make myself clear. I mean that you write in the
top and bottom halves of the screen, and the adaptor takes those
images, makes them full-sized, and alternates them.

When you look at the screen without glasses you get the 2 images
superimposed.

The advantage of this system is that you only need one double-buffer,
and you can use the existing z-buffering hardware. The only difference
is that it runs at half speed - which on a Silicon Graphics is still
approx 15000 polygons/sec.

Is there anyone from Silicon Graphics who can confirm this? I may
have got some of the details wrong.

---------------------------------------------------------------------
Matthew Kwan
        - The man with no .signature