Added support for handling a user define CoordinateFrame in the flight

and trackball manipulators with API access via the MatrixManipulator
base class

include/osgGA/KeySwitchMatrixManipulator

@@ -64,6 +64,8 @@ public:
 
         // Overrides from MatrixManipulator...
 
+        /** set the coordinate frame which tells the manipulator which way is up, east and north.*/
+        virtual void setCoordinateFrame(const osg::CoordinateFrame& cf) { _coordinateFrame = cf; _current->setCoordinateFrame(cf); }
 
         /** set the position of the matrix manipulator using a 4x4 Matrix.*/
         virtual void setByMatrix(const osg::Matrixd& matrix) { _current->setByMatrix(matrix); }