Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!husc6!bu-cs!tjh
From: tjh@bu-cs.BU.EDU (Timothy Hall)
Newsgroups: comp.sys.sgi
Subject: mmode and patch
Message-ID: <37519@bu-cs.BU.EDU>
Date: 4 Sep 89 19:20:17 GMT
Reply-To: tjh@bu-pub.bu.edu
Organization: Boston Univ.
Lines: 20

Does the 'patch' routine work while in 'mmode( MVIEWING )' ?  When I tried
this I got a singular matrix error from invert matrix.  (Yes, one of my patch
matricies is singular)  When I replaced the patch routine with moves and draws
it worked fine.

Granted using the patch routine and mmode( MVIEWING ) doesn't normally make
much sense but I was playing around with stereo viewing and using two different
projection matricies.  It would be easiest to just load these into the 
graphics engine projection matrix rather than saving the transformation matrix
and applying the projection each time I want to render a scene.

While on the subject of 3-D viewing.  Has anybody out there tried the LCD
glasses?  (I'm just using colored lenses)  A figuere of $2k seems to stick
in my mind for them - is that right?  If so, has anybody tried going to 
Toys R' Us and getting Sega or Nintendo glasses and hooking them up to the SGI?
(These run about $100)

-Tim Hall
Boston Univ. Computer Graphics Lab
tjh@bu-pub.bu.edu