Re: [info-performer] transparency bin - sorting

From: MLM Veraart (veraart++at++fel.tno.nl)
Date: 12/16/2002 09:02:37

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Florian Berger wrote:
>
> hi performer friends!
>
> in my applications the transparency bin doesnt seem to work properly.
> i did an initial
> setBinSort(PFSORT_TRANSP_BIN,PFSORT_BACK_TO_FRONT,NULL)
> on the channel.
> and i was careful not to use overlapping primitives, but still some objects
> behind e.g. a transparent window texture are not drawn sometimes, because the
> window is drawn first and sets the z-buffer.
>
> how in detail is sorting performed?
> by the balance point of the primitives?
> or is the sorting not even performed on primitive level?
>

As far as I know the sorting is done on a pfGeoset level.
>From the pfGeoset you take the center of the bounding box and they are
range sorted from back to front from the eye point

Mario

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