From: Dan Johnston (dan.johnston++at++nrc.ca)
Date: 02/26/2003 05:33:31
Vicente de Miguel Soria wrote:
> Hello everybody.
>
> I'm trying to implement a 3D stereo Performer application.
>
> I'm trying now to do the stereo IN the Performer application, with
> PFFB_STEREO, glDrawBuffer (LEFT and RIGHT), etc... It seems to work, but
> the synch between the Performer refresh and the glasses it's not correct
> and I don't know how to fix it.
>
> Anyone has any idea or has tested this?
>
>
I have recently done active stereo on MS-Windows using Performer3.0.
See my recent postings on pfAPC for details (anonymous ftp mars.imti.nrc.ca,
cd public/downloads).
We had the same problem with stereo on PC hardware on both Linux
and MS-Windows. We solved it with a small, inexpensive circuit and a
couple of connectors.
Connected in-line with the video out, and powered from most video out
connections, we placed a circuit to divide the refresh rate in half. Find
the
signal which runs at your refresh rate - say 120Hz - and divide it down to
60Hz. Use this 1/2 rate to drive your Crystaleyes emitter. We put a switch
in the circuit to select either the normal or inverted output from the
divider
so that we could swap left and right eye sync. Works good!
Of course, my pfAPC library has a feature where you can swap left and
right eyes in any stereo mode - all done in software with a single key
press.
Good luck!
--
___|__ |
/ | \ ||\ Daniel (Dan) Johnston
/___|___\ || \ Dan.Johnston++at++nrc.gc.ca
_____|____ || \ National Research Council of Canada, London, ON
| | | || \ Integrated Manufacturing Technologies Institute
\___| | | ||____\ Tel: (519) 430-7081 Fax: (519) 430-7090
\_o_\___|____|_|______\_ Inst: http://www.nrc.ca/imti
\ o / These opinions are my own! Not those of NRC.
\________________/ Virtual Reality:
http://www.nrc.ca/imti/vetc/home.html
More Tall Ships - Fewer Computers!
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