From: jan p. springer (jsd++at++igroup.org)
Date: 02/28/2003 06:06:49
Dan Johnston wrote:
> "jan p. springer" wrote:
>
>
>>from my understanding since the 32.21 drivers of nvidia a fake stereo w/ any
>>geforce4 should be possible. one can specify Option "Stereo" "4" and
>>twinview
>>in clone mode. this will get you stereo visuals for you application and a
>>left/right eye output on the left/right outlet of the card for passive
>>stereo.
>>
>>short on resources we couldn't verify this yet. can you?
>>
>> j.
>>
>
>
> Yes. you are right in that you should be able to create a passive stereo
> output on any twin view compatible graphics card. You just create
> a pfChannel to show to each view window. I had forgotten that option
> in my discussion. I know it was done a few years ago using
> the Matrox twin view board (which was very slow (then) in 3D).
> It should work well for any dual output GForce3 or GForce4.
>
> I have not tried to 'fake' any system parameters like you suggest.
> Also, I have a GForce3 twin view, but no GF4. The high end
> PC cards we have here are Wildcats, and their driver does support
> quad buffered modes directly (in Linux and MS-Windows)
>
> BTW. We rairly use passive stereo here. HMD displays have
> a very small field-of-view, and multiple projectors are
> expensive and hard to keep in alignment. Your experience
> may vary - especially with the new digital projectors which
> should be more stable.
>
> Thanks for your input!
correction: not any geforce 4 is supported by this.
the nvidia driver insists on enabling stereo (visuals) only on quadro 4 boards.
i've re-read the doc more carefully and it seems the driver is right:
[from /usr/share/doc/NVIDIA_GLX-1.0/README installed by the 41.91 glx rpm]
<quote>
Stereo is only available on Quadro cards, and is not
supported in TwinView (with the exception of TwinView
clone mode stereo, option #4 above). Currently, stereo
operation may be "quirky" on the original Quadro (NV10)
chip and left-right flipping may be erratic. We are
trying to resolve this issue for a future release.
Default: Stereo is not enabled.
</quote>
j.
-- +------------------------------------+--------------------------------------+ | jan p. springer | jsd++at++igroup.org | | computer science, buw.media.vrsys | jan.springer++at++medien.uni-weimar.de | +------------------------------------+--------------------------------------+
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