Hello,
For the answer, I suggest you revise the C++ docs about dynamic_cast<>
and also check the class hierarchy of OSG's node types.
dynamic_cast<A*> succeeds for any pointer to an object of class A or any
pointer to an object of a derived class of A. So even if you don't have
a proper Group at the root, if you have any object of a derived class of
Group (like osg::MatrixTransform, osg::Switch, etc.) it will succeed.
Check out Node::asGroup() (reimplemented in osg::Group) for an
alternative to dynamic_cast (trades a dynamic_cast which is pretty
costly for a virtual method call which is much less costly).
Hope this helps,
J-S
On 21/08/2012 3:49 PM, Peterakos wrote:
Hello.
I forgot to mention that i check it. That's why i posted it. Cause it
is very strange to run even though there is no group as root..
osg::ref_ptr<osg::Group> node =
dynamic_cast<osg::Group*>(osgDB::readNodeFile( "astroboy_walk.dae" ));
if(!node) {
std::cout << "Model could not be loaded " << std::endl;
return 1;
}
thank you.
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