From: hibbett@prcs3.decnet.philips.be Subject: More exciting "Garage VR"! Date: Sat, 11 May 91 11:17:48 +0200 Chris writes, in reply to Greg ?'s article:- >>It seems to me that a powerglove could be used for the position sensor >>(just aim it backwards, and put the receivers behind you) and still >>let you use a power glove for a glove. > >The noisiness of the data given by the ultrasound sensors will drive you wild. I agree with Chris, but I wonder if a simpler (or rather, cheaper!) system would be possible given a less complex working environment, say a box room with just a desk and perhaps a chair. In this kind of environment I am mostly going to be sitting still, moving my head up & down, left to right and using a glove to define directions of movement etc. Personally for something as simple as this, I would use a combination of ultra-sonic transducers for head location/orientation, but the problem comes with the glove. It may be possible to use ultra-sonics on the glove too, using time-multiplexing, but this will of course result in a very low sampling rate. How about frequency-multiplexing? Are ultra-sonic transducers available at higher frequencies tahn the standard 40KHz? As for eye-phones, I am still playing with a pair of Citizen M329 colour LCD monitors. Not very good, they have twisted-nematic (TN) glass with colour filters which results in a very tight viewing angle. However they are cheap (115 pounds each at Dixons) which is very important when justifying the purchase to my wife! > >The rest of the post is on the right track. See Randy Pausch's paper in >CHI 91, "Virtual Reality on Five Dollars a Day". > Sounds interesting. I'd like to read it, but I've never heard of CHI. What is it Chris, or where is it? ____ /\ /\ \ \ / \ / \/ \ \ \/_ \___ / \ \ \ -_ \____ -------------------------------------------------------------------------------- Mike Hibbett Software engineer | Philips Radio Communication Systems Ltd Tel: INT + 44 223 358985 Ext.3310 | St Andrews Road, Cambridge, CB4 1DP, England ----------------------------------+--------------------------------------------- Philips DECnet: PRCS3::HIBBETT | EUnet: hibbett@prcs3.decnet.philips.be -------------------------------------------------------------------------------- [MODERATOR'S NOTE: CHI is the conference for SIGCHI, the computer-human interaction special interest group of the Assn. for Computing Machinery (ACM), the American overarching professional group. Randy Pausch spoke on "VR on $5 a Day" at the New Orleans CHI, just concluded. You can reach Randy Paucsch (I think) at pausch@cs.uva.edu. Anyway, he's online here, so maybe he'll reply directly to these posts. He put up a "$5/day VR" paper here; it's in the archives (pointers, anyone?). -- Bob Jacobson]