Re: [info-performer] pfGeoSetCB: copy and setDrawCB problem

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From: Yair Kurzion (yair++at++polygon.engr.sgi.com)
Date: 07/29/2002 18:42:03

Hi Alex,

Try calling gsetCB->setCBIndex() right after gsetCB->setDrawCB().

I think you found a bug (Thanks). The call to pfGeoSet::copy overrides some
internal pfGeoSet flags, and it fails to behave like a pfGeoSetCB.
The call to setCBIndex resets these flags.

Please let me know whether the fix works for you. If it does, I'll incorporate
it in the next pf release.

Thanks,
-yair

> I would like to use my own draw callback function for pfGeode geometry of a subpart
> of my scene graph (to use NVidia Cg compiler).
>
> For that I traverse the scene graph and I try to replace all pfGeoSet by pfGeoSetCB
> like that:
>
> pfGeoSet *oldgset = geode->getGSet(i);
> pfGeoSetCB *gsetCB = new pfGeoSetCB();
> gsetCB->copy(oldgset);
> gsetCB->setDrawCB( drawCB, NULL);
> geode->replaceGSet( oldgset, gsetCB);
>
> but it doesn't work, my DrawCB is not used, ?
> If I comment the line with the copy it works, my callback is used.
> There is something that I don't understand in the copy function but what?
>
> I could write a new copy function that copy a pfGeoSet to a pfGeoSetCB but
> I would like to understand what is the problem with the standard copy
> function here, if someone knows ...
>
> Thanks,
> Alex
>
>
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-- 
\_________  \_____  \__    \__  \_____        
\_________  \_____   \__   \__  \_____         Yair Kurzion
       \__     \__   \____\__      \__         yair++at++sgi.com
       \__          \__  \__                  (650) 933-6502
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