Erik Hofman said:

> Dave Martin wrote:
> > On Monday 24 Jan 2005 14:01, Oliver C. wrote:
> >>I assume that this feature is not supported by the hardware on the consumer
> >>video cards.
> >>So OpenGL falls back to software mode.
> >>That's why we get 1-3 fps here.
> >>
> > 
> > Well, thats interesting; would that also explain why the normal 'point' 
> > lighting has such a crippling effect on the frame-rate?
> To be honest, I don't exactly know why it has this effect on framerate 
> (or why it isn't supported very well).
> An alternative might be to use pentagonal vertex-fans and alpha blending 
> which supposedly should perform quite well on all modern hardware.

That might work quite well.  I've kind of wondered myself what the deal is. 
It does not seem logical that adding that property should cause the driver to
drop into software rendering.  It ought to just ignore it.

Just out of curiosity, is anyone getting this slowdown with ATI cards?



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