Re: Perf drawing order

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Kowsik Guruswamy (kowsik++at++coryphaeus.com)
Thu, 25 Jul 1996 13:26:28 -0700

On Jul 25, 12:14pm, Dewey Anderson wrote:
> Subject: Perf drawing order
>
> Does anybody know what determines the drawing order for Performer, and if
> there's any way to control it? We're looking for a way to get around not
> having a Z-buffer in some applications.

[snip]

> I was hoping that the statement in the manual that traversal happens
> left-to-right would apply to drawing as well but my example seems to indicate
> that the drawing order can change.
>
> Is there any way to control this? I can imagine that no one ever expected
> performer to be used in a situation where there is no depth buffer so I
> wouldn't be surprised to hear that it's not consistent or controllable.

This is just a thought and haven't tried it. The left-to-right traversal
definitely happens, but the cull process sorts the pfGeoSets based on minimal
state changes. What I am getting at is that you might want to try disabling
sorting for the pfChannel to guarantee the order. [use
pfChanTravMode (PFCULL_GSET | PFCULL_VIEW)]

K.

K.

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