Hi all,
I'm running into an interesting bug in my code which manifests as behaviour
that works on one platform (Windows) and not on another (OS X) with the same
OSG code. (Using OSG trunk, around 3.1.4)
I am using the following node visitor to reset animations attached to transform
nodes:
class ResetAnimationNodesVisitor : public osg::NodeVisitor
{
public:
ResetAnimationNodesVisitor():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
virtual void apply(osg::Transform& transform)
{
osg::NodeCallback *nc = transform.getUpdateCallback();
osg::AnimationPathCallback* apc =
dynamic_cast<osg::AnimationPathCallback*>(nc);
if (apc) {
apc->reset();
apc->update(transform);
}
traverse(transform);
}
};
This visitor is instantiated on a node thus:
void resetAnimationTime(osg::ref_ptr<osg::Node> modelNode)
{
ResetAnimationNodesVisitor ranv;
modelNode->accept(ranv);
}
When compiled and run on an animated model under Windows (compiled with Visual
Studio 2010 SP1) all works as expected. When the exact same code is compiled
and run under OS X (using Xcode 4.5.2, with LLVM 4.2.1) the dynamic cast to
osg::AnimationPathCallback* is always NULL.
I have checked that RTTI is not disabled (it's on by default, and no errors are
produced by the dynamic_cast<>, and that indeed things are as expected with
this snippet inside apply():
if (nc) osg::notify(osg::NOTICE) << "UpdateCallback: className is " <<
std::string(transform.getUpdateCallback()->className()) << " and type_id.name()
is " typeid(transform.getUpdateCallback()).name() << std::endl;
which produces the output:
UpdateCallback: className is AnimationPathCallback and type_id.name() is
PN3osg12NodeCallbackE
So it looks like a failure somewhere in RTTI. Both typeid and the
dynamic_cast<> fail to convert the osg::NodeCallback* to an
osg::AnimationPathCallback*. Yet clearly, the callback IS the right type, as
evidenced by OSG's className() function's output.
Any ideas about where this kind of issue might be coming from?
Regards,
Phil._______________________________________________
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