>Is it reasonable to assume that the offloading of some OpenGL processing to the
>video card will improve the frame rates in GPL?
Don't assume that T&L processing will be offloaded without a patch. I
did a "strings rastOGL.DLL | grep gl" to see which OpenGL functions are
being called. To my inexpert eye, it looks like Papy wrote their own
T&L code rather than using the OpenGL functions that the GeForce
will accelerate.
When supported, hardware T&L will help a lot when you're CPU-bound and
a lot of those CPU cycles are dedicated to T&L. It won't help much if
fill rate or the drivers are the main bottleneck. OpenGL GPL with mirrors
seems mostly driver-bound on my system (TNT1, Celeron 366 at 539 MHz) up
to 1024x768. Beyond that, the TNT1 starts to run out of fill rate. A
GeForce should help a lot when running at higher resolutions, merely
because of the higher fill rate. But 1152/1280/1600 with laggy mirrors
and reduced frame rates at the start of the race still wouldn't be ideal.
I asked Nick Triantos at Nvidia if he was aware of the GPL / TNT mirror
issue. He said that he'd try to talk to Papyrus and figure out the
problem. No guarantee that we'll see a fix anytime soon, but a good
sign.
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