Ampere K. Hardraade wrote:
On July 28, 2005 12:36 pm, Vivian Meazza wrote:
There was a theory going the rounds that it was the PAPI/VASI lights which
were/are the cause of the significant drop of frame rate around airports.
Vivian
Why can't just model them?
It is ridiculous to see each light taken only 4 pixels when the camera is only
a few meters away.
Well, come up with a way where we can adjust the light color/intensity
based on relative view angle, and the light is not visible (or barely
visible) when viewed from behind. Our current approach is carefully
crafted to do this pretty well, but depends on using "glPoints" for the
lights. Smooth points is not implimented in hardware on "game" cards
that I'm aware of. But we are only using a few of them in any scene so
we get away with software rendered points just fine. Except nvidia
rolls out their next driver version and these software rendered points
have gotten excruciatingly slow on some cards ... but that now seems
fixed in the latest driver.
Curt.
--
Curtis Olson http://www.flightgear.org/~curt
HumanFIRST Program http://www.humanfirst.umn.edu/
FlightGear Project http://www.flightgear.org
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