From: Angus Dorbie (dorbie++at++sgi.com)
Date: 05/24/2000 13:52:06
This cannot work with a single app right now.
It might be possible by running two copies of Performer as separate
applications but you need DRI based drivers to handle the dispatch of
OpenGL to the right card with this type of config and the nVidia drivers
don't use that framework but use their own fast dispatch method so you'd
need to mess around with which different version of OpenGL libs that the
two copies of Performer linked to so that the nvidia display got
hardware acceleration via the SGI nVidia drivers and the voodoo's (SLI I
assume) worked via the DRI drivers.
This is my best guess as to what you need to do, I haven't tried this, I
expect you'll be the pioneer if you proceed with your plan.
The stereo will be horrid since there will be no sync of refresh, swaps
or update. You could do a little bit in software through shared memory
but you's will at least like to block on frame completion before the
swap probably just after pfDraw and that will slow you down. There will
also inevitably be some subtle and perhaps not so subtle differences in
rendering outbut between the eyes with this kind of heterogeneous
solution.
This all kind of assumes that you are aiming for a GeForce + voodoo3 SLI
combo. A more homogeneous 2X voodoo3 solution would be less troublesome
but slower.
Cheers,ANgus.
Jason Daly wrote:
>
> Has anyone had any success getting a multipipe configuration working under
> Linux? Does Performer 2.3 for Linux even support it?
>
> I'm looking to drive a stereo HMD with a Linux box. If anyone has
> any pointers on how this might be done I'd appreciate it.
>
> My configuration is a P2-300 with an Nvidia GeForce DDR card in the AGP
> slot and two 3dfx Voodoo3 3000's in PCI slots. I'm running Redhat 6.2
> with XFree86 4.0.
>
> Thanks,
>
> --"J"
>
> Jason Daly
> jdaly++at++ist.ucf.edu
>
> "I'm a castaway stranded in a desolate land,
> I can see the footprints in the virtual sand."
> --Neil Peart
>
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