OsgCameraManipulator.h

#pragma once

namespace OsgAnimatSim
{
        namespace Visualization
        {

                class OsgCameraManipulator : public osgGA::TrackballManipulator
                {
                        private:
                                bool m_bShiftDown;
                                bool m_bControlDown;    
                                bool m_bInDrag;

                                float m_fltPrevX;
                                float m_fltPrevY;

                                Simulator *m_lpSim;
                OsgSimulator *m_lpOsgSim;

                                osg::Vec3 m_vPickPoint;
                                osg::Vec3 m_vPickNormal;
                                MovableItem *m_lpPicked;
                                osg::Vec3 m_vSelectedVertex;

                                osg::Quat m_quatRotation;
                                osg::Vec3 m_v3Eye;

                                osg::ref_ptr<osgViewer::Viewer> m_osgViewer;
                                osg::ref_ptr<osg::Viewport> m_osgViewport;

                                virtual const osg::Camera *GetCamera(float x, float y, float &local_x, float &local_y);
                                virtual const osg::Camera *GetCamera(float x, float y);

                                virtual osg::Vec3 FindSelectedVertex(osgUtil::LineSegmentIntersector::Intersections::iterator &hitr);

                        protected:
                                bool CanDoMouseSpring();
                                bool DoMouseSpring(const GUIEventAdapter& ea, float x, float y);
                                void DoPan(const GUIEventAdapter& ea, float x, float y);
                                void DoZoom(const GUIEventAdapter& ea, float x, float y);
                                void DoRotate(const GUIEventAdapter& ea, float x, float y);

                                osg::Vec3 ConvertMouseTo3D(const GUIEventAdapter& ea, int x, int y, osg::Vec3 vGrabPos);

                                void pick(const osgGA::GUIEventAdapter& ea, GUIActionAdapter& aa);
                                float tb_project_to_sphere(float r, float x, float y);

                        public:
                                OsgCameraManipulator(Simulator *lpSim, osgViewer::Viewer *osgViewer, osg::Viewport *osgViewport = NULL);
                                ~OsgCameraManipulator(void);

                                virtual bool handle(const GUIEventAdapter& ea,GUIActionAdapter& us);

                };

        }// end Visualization
}// end OsgAnimatSim