Initial revision

include/osgUtil/DriveManipulator

@@ -0,0 +1,68 @@
+#ifndef OSGUTIL_DRIVEMANIPULATOR
+#define OSGUTIL_DRIVEMANIPULATOR 1 
+
+#include <osgUtil/CameraManipulator>
+
+namespace osgUtil{
+
+class OSGUTIL_EXPORT DriveManipulator : public CameraManipulator
+{
+    public:
+
+	DriveManipulator();
+	virtual ~DriveManipulator();
+
+        /** Attach a node to the manipulator. 
+            Automatically detaches previously attached node.
+            setNode(NULL) detaches previously nodes.
+            Is ignored by manipulators which do not require a reference model.*/
+        virtual void setNode(osg::Node*);
+
+        /** Return node if attached.*/
+        virtual osg::Node* getNode() const;
+
+        /** Move the camera to the default position. 
+            May be ignored by manipulators if home functionality is not appropriate.*/
+        virtual void home(GUIEventAdapter& ea,GUIActionAdapter& us);
+        
+        /** Start/restart the manipulator.*/
+        virtual void init(GUIEventAdapter& ea,GUIActionAdapter& us);
+
+        /** handle events, return true if handled, false otherwise.*/
+	virtual bool update(GUIEventAdapter& ea,GUIActionAdapter& us);
+
+    private:
+
+        /** Reset the internal GUIEvent stack.*/
+        void flushMouseEventStack();
+        /** Add the current mouse GUIEvent to internal stack.*/
+        void addMouseEvent(GUIEventAdapter& ea);
+
+        /** For the give mouse movement calculate the movement of the camera.
+            Return true is camera has moved and a redraw is required.*/
+        bool calcMovement();
+
+        // Internal event stack comprising last three mouse events.
+        osg::ref_ptr<GUIEventAdapter> _ga_t1;
+        osg::ref_ptr<GUIEventAdapter> _ga_t0;
+
+        osg::ref_ptr<osg::Node>       _node;
+
+        float _modelScale;
+        float _velocity;
+        float _height;
+        float _buffer;
+
+        enum SpeedControlMode {
+            USE_MOUSE_Y_FOR_SPEED,
+            USE_MOUSE_BUTTONS_FOR_SPEED
+        };
+
+        SpeedControlMode _speedMode;
+
+};
+
+}
+
+#endif
+