Stephane Lamoliatte wrote on Wednesday, December 19, 2007 11:32 AM:
> Hello,
>
> I created a new node, MyGroup, which extends osg::Group.
> I want to visit it in the scene graph with a NodeVisitor. So, I wrote
> MyNodeVisitor which extends osg::NodeVisitor. MyVisitor contains an
> apply function which takes MyGroup in parameter :
> MyVisitor::apply(osg::MyGroup &).
>
> The problem is that this function is never called : The application
> call MyVisitor::apply(osg::Group&) instead.
>
> Does somebdy know why ?
It's because of the way C++ works; the only visitor apply() functions
that can be called are the ones defined in osg::NodeVisitor.
Unfortunately, the only way to handle your node specially is to check
for it in apply(osg::Group):
MyVisitor::apply(osg::Group& group)
{
...
MyGroup* mgrp = dynamic_cast<MyGroup*>(&group);
if (mgrp)
{
// do your special stuff here
}
...
}
--
Bryan Thrall
FlightSafety International
[EMAIL PROTECTED]
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