Classes derived from NodeCallback are attached to nodes in the scene graph and operated during a scene graph traversal. Since the class you've posted is named CameraUpdateCallback, I'm guessing it is added using the setUpdateCallback method. During the update traversal of the scene, the update visitor calls the operator()(osg::Node* n, osg::NodeVisitor* nv) method. Since the callback is attached to a Camera node, n can be cast to a pointer to the Camera. The view and projection matrices of the camera are set based on the view and projection matrices of some other camera (mOtherCamera).
So to answer your final questions, it is operated during the update traversal (until it is removed from the Camera node, if that ever happens), and it operates on whichever node in the scene graph that it is attached to. Cheers, Tom ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=41765#41765 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
