Alex,
I was able to set up a Cave like environment with a single PC and 2
graphics cards using
the DirectX version of Java3D, the OpenGL version was not able to handle
the multiple frame
buffers from the cards. Note I did this with Windows2000 because of the
multiple cards.
Under NT the OpenGL version may work with mutiple cards which allow me to use
the hardware acceleration from my Tornado 3000 and Wildcat 3400 cards, note
that
one is AGP and one is PCI. The performance is less than what I get with the
OpenGL
version, but I was more concerned with setting the CAVE environment with
Java3D.
The environment is 2 screens at a right angle with head tracking. The
Tornado card
even works in stereo with Java3D, but not the Wildcat.
At 08:51 AM 10/9/2000 -0700, you wrote:
>I am still attempting to run a Cave from a single PC using 3 PCI cards and
>Java3D. My PCI cards are VOODOO3 3000s with 16MB on board. I have a
>comparison machine available with a TNT 2 Ultra AGP card under Windows NT.
>Also, I am using jdk1.3 and J3D 1.2 for OpenGL.
>
>The sample environment is mostly boxes with big textures.
>
>Here are some diagnostics:
>
>If my canvas remains completely on the primary PCI card, things run pretty
>smoothly. When I put any tiny part of the canvas on the second monitor,
>performance goes way down on BOTH SCREENS. This situation is not rectified
>when I remove all objects with textures. Even with 4 simple cubes,
>performance is totally whacked when I crossover to the second screen.
>
>I am assuming that I no longer get hardware acceleration when I have any
>canvas on the second or third monitor. John Wright had sent an email
>warning that this might be the case. Could this also be a limitation of the
>PCI bus? Would moving to Direct X offer any solution? If one used one AGP
>card and one multimonitor PCI, for example, how would that affect
>performance?
>
>As always, thanks for the help.
>
>Alex Terrazas
>[EMAIL PROTECTED]
>
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Jack S. Gundrum
Visualization Group
Center for Academic Computing
Penn State University
Email:[EMAIL PROTECTED]
Phone:(814)865-1863
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