Path: utzoo!attcan!uunet!decwrl!sdd.hp.com!cs.utexas.edu!uwm.edu!ogicse!milton!tomw%orac.esd.sgi.com@sgi.com From: tomw%orac.esd.sgi.com@sgi.com (Tom Weinstein) Newsgroups: sci.virtual-worlds Subject: Re: Stereoglasses, active technology Message-ID: <7654@milton.u.washington.edu> Date: 16 Sep 90 07:20:41 GMT References: <7545@milton.u.washington.edu> <7571@milton.u.washington.edu> Sender: hlab@milton.u.washington.edu Organization: Silicon Graphics Inc. Lines: 39 Approved: hitl@hardy.u.washington.edu In article <7622@milton.u.washington.edu> cphoenix@csli.Stanford.EDU (Chris Phoe nix) writes: > In article <7609@milton.u.washington.edu> mkwan@mullauna.cs.mu.OZ.AU (Matthew Kw > an) writes: >>I went to the AUSGRAPH trade show this week in Melbourne, and Silicon >>Graphics had a 3-D setup running with wireless glasses. >>The glasses were synchronized with an IR transmitter mounted on the >>top of the monitor, and were completely separate (i.e. had batteries >>built-in). >>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? > This sounds like it wants prism glasses to merge the picture, not fancy > $2500 wireless LCD glasses. I thought the point of LCD glasses was so you > could put a picture on the full screen... > Some people have told me that you actually do get a good 3-D view with > simple prism glasses (molded plastic, *cheap*) and drawing on two halves > of the screen. This is another possibility for cheap 3-D effects. There are two modes that the monitor can be in. It can be in normal 1280x1024 mode, or it can be in stero 1280x512 mode which looks to the software like 1280x1024 mode, but the top half of the screen is one stereo buffer and the bottom half is the other stereo buffer. The video hardware then alternates between the buffers, sending out sync signals through a little IR box that you can sit on top of your monitor. -- Tom Weinstein Silicon Graphics, Inc., Entry Systems Division, Window Systems tomw@orac.esd.sgi.com Any opinions expressed above are mine, not sgi's.