[info-performer] setNodeTravFuncs

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From: Daniela Rainer (dr++at++vircinity.com)
Date: 06/16/2004 07:43:09

Hi all,

I found a strange behaviour of pfNode::setTravFuncs:

I use a pre traversal callback to prevent intersection testing of a part of
the scenegraph (the callback contains only "return PFTRAV_PRUNE"), because
I don't want to modify the isect mask of the node.

I remove the traversal callback with setTravFuncs(PFTRAV_ISECT,NULL,NULL). The
traversal callback is set for a group node. This procedure works well if the
group node has geode children.

If the traversal callback is set when the DCS has no children, it is not
called, but it seems that intersection testing is skipped, because if geodes
are added later, they are not intersected. If the traversal callback is
removed now, intersection is enabled.

If the TravFunc is first set and then removed before geodes are added, it
seems that intersection testing is still skipped although there is no
traversal callback anymore. Can anybody explain this behaviour?

As workaround I set/remove the traversal callback again when geodes are added
but I hope there is a simpler solution.

Thanks for any help.

Best Regards
Daniela 

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Daniela Rainer                       | email: dr++at++vircinity.com
Vircinity GmbH                       | http://www.vircinity.com
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