+ void AddObserver(int eventNumber, vtkCommand *observer);
+ bool GetInterpolate();
+ void SetInterpolate(bool value);
+ bool GetFixAxis2D();
+ void SetFixAxis2D(bool value);
+ double GetOpacityAxis();
+ void SetOpacityAxis(double value);
+ double GetCameraParallelScale();
+ void SetCameraParallelScale(double value);
+