Subject:
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Re: *** LDView Version 1.9.5 Released ***
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Newsgroups:
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lugnet.cad
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Date:
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Sun, 4 Aug 2002 21:58:12 GMT
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Viewed:
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1020 times
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In lugnet.cad, Martijn Zwaal writes:
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> spatially. I also discovered in a document in the nvidia sdk that 2 sided
> lighting is almost for free on geforce3 products or higher in the case of
> 'infinite viewer/light source'. Another advantage of using 'infinite
...
Well, I just checked at home, and two sided lighting is a relatively
expensive operation on my GeForce3, even when the viewer is treated as an
infinite viewer. (As I mentioned in my other post, all my light sources are
infinite.) In a complex model, one-sided lighting is approximately 20%
faster than two-sided lighting. (I determined this by changing my code to
use one-sided lighting, which produced incorrect output, but showed me the
speed.) Now they might consider a 15% slowdown to be "almost for free", but
I certainly don't.
--Travis Cobbs (tcobbs@REMOVE.halibut.com)
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Message is in Reply To:
 | | Re: *** LDView Version 1.9.5 Released ***
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| Nice to see that everything is ok. Those arms need to be fixed anyway. In the mean time I tried to speed up rendering using the vertex array range and fences extension on a geforce3. This seems to be about as fast as display lists but uses less (...) (22 years ago, 1-Aug-02, to lugnet.cad)
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