Hi users,
I have a problem to traverse a graph.
There's an example of how to traverse a graph calling a class method
at the end of the Traversal tutorial.
I want to do the same but calling the traverse function within a method of
the class.
// This is some method within the class CLattice:
traverse( _root,
osgTypedMethodFunctor1ObjPtrCPtrRef
<Action::ResultE, CLattice, NodePtr>
(this, &CLattice::extendVolume) );
The difference to the example on opensg.org is the 'this' pointer
// Following is the method that should be processed when entering a node:
Action::ResultE CLattice::extendVolume( NodePtr& nod )
{
// this tests if the core is derived from geometry
if( nod->getCore()->getType().isDerivedFrom(Geometry::getClassType()) )
{
//...
}
return Action::Continue;
}
When testing whether the node has a geometry core, I get a null pointer
exception.
Somebody see my mistake?
Sven
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