Ogre에서 화면에 2D 오브젝트 그리기

Ogre::Overlay*                 mMyOverlay;

Ogre::OverlayContainer*     mMyOverlayContainer;

mMyOverlay = Ogre::OverlayManager::getSingleton().create("MyOverlay");

mMyOverlayContainer = static_cast<Ogre::OverlayContainer*>(Ogre::OverlayManager::getSingleton().createOverlayElement("Panel", "MyOverlayElement"));

mMyOverlayContainer->setMetricsMode(Ogre::GMM_PIXELS);

mMyOverlayContainer->setPosition(100,100);

mMyOverlayContainer->setDimensions(30,30);

mMyOverlayContainer->setMaterialName("Examples/Rockwall");

mMyOverlay->add2D(mMyOverlayContainer);

mMyOverlay->show();