Draws arrows showing camera orientation in the overlay. X, Y position is in range 0, 1.
| void | TGLOverlayElement::ProjectionMatrixPushIdentity() |
| TGLCameraGuide& | operator=(const TGLCameraGuide&) |
| TGLCameraGuide(const TGLCameraGuide&) |
| static TGLOverlayElement::EState | TGLOverlayElement::kActive | |
| static TGLOverlayElement::ERole | TGLOverlayElement::kAll | |
| static TGLOverlayElement::EState | TGLOverlayElement::kAllVisible | |
| static TGLOverlayElement::ERole | TGLOverlayElement::kAnnotation | |
| static TGLOverlayElement::EState | TGLOverlayElement::kDisabled | |
| static TGLOverlayElement::EState | TGLOverlayElement::kInvisible | |
| static TGLOverlayElement::ERole | TGLOverlayElement::kUser | |
| static TGLOverlayElement::ERole | TGLOverlayElement::kViewer |
| Bool_t | fInDrag | |
| TGLOverlayElement::ERole | TGLOverlayElement::fRole | |
| Int_t | fSelAxis | |
| Float_t | fSize | |
| TGLOverlayElement::EState | TGLOverlayElement::fState | |
| Float_t | fXPos | |
| Float_t | fYPos |

Constructor.
Handle overlay event. Return TRUE if event was handled.