Re: pfLightSource and performance ?!

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Mario Veraart (rioj7++at++fel.tno.nl)
Wed, 7 May 1997 11:07:38 +0200 (MET DST)

Remi Arnaud wrote:
> Local light source use a projective texture, alpha blending multipass algorithm.
> The whole database is send twice to the pipe, resulting in a nearly 50%
> drop of for performance.

> Global lightning is done through OpenGL lights. The performance hit
> depends on the number of lights that are turned on.
I didn't knew that the OpenGL lights where capable of generating so much
energy in the scene that there is a spontaneous electrical discharge
in the database or the computer. Maybe the damage of these lightnings is the
cause of the performance drop 8-).

> You may want to try different number of light on your system to
> see the difference in performance.
How much can a SGI workstation indure?

Mario
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