Re: Onyx RE2 to Onyx2 iR

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Brian Kramer (brian++at++eideticscorp.com)
Mon, 28 Jul 1997 08:48:40 -0800

>On Jul 26, 7:05pm, Simon Bennett wrote:
>> Subject: Re: Onyx RE2 to Onyx2 iR
>> On Thu, 24 Jul 1997, Kaylor, Brett wrote:
>>
>> > - We currently have 2 pipes on our Onyx. We set each pipe to
>> > 1280x1024_180qi for input to our nVision HMD. We use one pipe for each
>> > eye for stereo display. How do we set up the iR to do the same? Looking
>> > at ircombine, we don't quite understand it. When using the ircombine gui,
>> > are the channels supposed to be on top of each other?
>>
>> No. I think you'll find that your problem is that you need to "Edit
>> Globals" and make the total display size larger. For two 1280x1024 size
>> windows you'll need a total managed area of 2560x1024. (Assuming you have
>> the RM's to do this)
>
>Yep, just make sure you "save to eeprom" instead of trying to "download
>format". You then have to restart graphics for the managed area size changes
>to take effect.

We have had good results using the nVision DataVisor 80 and the iR in a
different configuration. Originally I set up ircombine as described above
and had bad syncronization between the two channels. Instead, try using the
iR in true stereo mode where the left and right eye sit on top of each
other in the frame buffer. The ircombine setup is simple. Select Ch0 and
the then the video format (1280x1024_180qi). Then select Ch1 and the same
format. Both channels should use pixels 0 to 1280 and 0 to 1024. The only
other difference is select both sync on red _and_ green (two check boxes)
in the "Channel Attributes" panel. The physical connection needed is to
connect the right eye to the red wire on channel 0 and the left to green.
Then you will also have to modify your code slightly. We don't currently
use Performer :( (sorry folks), but for GVS and OpenGL the changes are
limited to reqesting an X-Window visual with stereo (GLX_STEREO) and then
choosing the left or right eye's buffer with glDrawBuffer() set to either
GL_BACK_LEFT or GL_BACK_RIGHT. Sorry, I don't know the appropriate "pf"
calls. This setup works with a single RM system. If you have another
machine networked with your iR you may also want to run ircombine from
there so you can just "download format" back and forth as often as you need
without restarting the pipe... same managed area ("./ircombine -target
ir:0.0 -display indy:0.0"). Good luck!

Brian

____________________________________________________________________________

Brian R. Kramer Eidetics Corporation
Director 3425 Lomita Blvd.
Advanced Technology Development Torrance CA 90505 USA
(310) 326-8228 ext 22 (310) 326-9358 fax

                       mailto:brian++at++eideticscorp.com
____________________________________________________________________________

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