- _interactorstylemprview = new vtkInteractorStyleMPRView();
- ((vtkInteractorStyleBaseView*)GetInteractorStyleBaseView())->AddInteractorStyleMaracas( _interactorstylemprview );
+ if(_interactorstylemprview==NULL)
+ {
+ _interactorstylemprview = new vtkInteractorStyleMPRView();
+ ((vtkInteractorStyleBaseView*)GetInteractorStyleBaseView())->AddInteractorStyleMaracas( _interactorstylemprview );
+ }
+
+