Hi,
I have problems with understanding the use of a NodeCallback.
Can anyone explain me what a Nodecallback is doing?
Another concrete question:
I have some code with a class that derives from osg::Nodecallback. This class
implements operator():
Code:
class CameraUpdateCallback : public osg::NodeCallback {
private:
osg::ref_ptr<osg::Camera> mOtherCam;
public:
CameraUpdateCallback(osg::Camera* otherCam) : mOtherCam(otherCam) { }
osg::ref_ptr<osg::Camera> m_sourceCamera;
void operator()(osg::Node* node, osg::NodeVisitor* nv) {
osg::Camera* cam = static_cast<osg::Camera*>( node );
cam->setViewMatrix(mOtherCam->getViewMatrix() );
cam->setProjectionMatrix(mOtherCam->getProjectionMatrix() );
traverse(node , nv);
}
...
camera->setUpdateCallback( new CameraUpdateCallback( currentView->getCamera() )
);
Does anyone understand this code? It adds a CameraUpdateCallback to the camera.
When is this operator() called? Is this called only for the camera or for every
node in the graph?
Thanks for any help!
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=41762#41762
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
