Mark Baranowski (baranowski++at++marklynn.demon.co.uk)
Wed, 07 May 1997 07:59:21 GMT
>Hi,
>
>I've got a question on the subject of pfLightSources.
>
>I noticed a performance drop of nearly 50% in using either a local or global
>lightsource. Is this normal ??
>
>I think its quite a lot. I mean there's nothing in the manual pages on this
>performance drop (yes there is something in there like that local lightsource
>"incur a performance penalty" but not 50%). So either I so something wrong (most
>likely scenario) or this is normal behaviour.
How are you measuring performance? If you are just looking at the
framerate figure, you may find that for example your framerate has
gone from 60Hz to 30Hz by just adding lightsources. If this is the
case, your draw time was previously only just within the 1/60th second
required for 60Hz update and the extra millisecond(s) required for the
lightsources has just pushed you over.
Mark.
--
Mark Baranowski at work (baranowski++at++marklynn.demon.co.uk)
Pera, VR Division. Melton Mowbray, Leics. LE13 0PB. UK.
Tel: +44 (0)1664 501501, Fax: +44 (0)1664 501553
All opinions expressed are my own and should not be viewed
as representing my employer unless stated otherwise.
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