VRS - The Virtual Rendering System

version 3.3

groundplatenavigation.h

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/******************************************************************************
* VRS - The Virtual Rendering System
* Copyright (C) 2000-2006 Computer Graphics Systems Group at the 
* Hasso-Plattner-Institute (HPI), Potsdam, Germany.
*
* This  library  is  free  software; you can redistribute it and/or  modify it
* under the terms of the GNU Lesser General Public  License  as  published  by
* the  Free  Software  Foundation;  either  version 2.1 of the License, or (at
* your option) any later version. This library  is  distributed  in  the  hope
* that  it will be useful, but  WITHOUT ANY WARRANTY; without even the implied
* warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.  See  the
* GNU Lesser General Public License for more details. You should have received
* a copy of the GNU Lesser+ General Public License along with this library; if
* not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA, 02111-1307, USA.
******************************************************************************/

// $Id: groundplatenavigation.h 6014 2007-08-09 07:51:16Z Konstantin_Baumann $
//
// $Log$
// Revision 1.1  2006/04/21 12:35:37  bohnet
// added navigationtechniques compatible with new interaction concept:
// spheregroundplatenavigation, zoomgroundplatenavigation, movefocusgroundplatenavigation
//

#ifndef VRS_SG_GROUNDPLATENAVIGATION_H
#define VRS_SG_GROUNDPLATENAVIGATION_H

#include <vrs/sg/interactiontechnique.h>
#include <vrs/engine.h>
#include <vrs/rayrequest.h>
#include <vrs/sg/canvas.h>

namespace VRS {
    
    class VRS_CORE_API GroundPlateNavigation : public InteractionTechnique {                          

        public:
                static Vector polar2Cartesian(const Vector& v);

                static VRS::Vector cartesian2Polar(const VRS::Vector& v);

                static Vector getUp();

                static double getMaxAltitude();

                static double visualFlow2horizontalMovement(double screens, double fov = 45.0);

                static double horizontalMovement2visualFlow(double units, double fov = 45.0);

                static bool performRayRequest(int x, int y, SO<Canvas> canvas, SO<RayRequest> request);


        VRS_TYPEINFO(GroundPlateNavigation, InteractionTechnique);

        protected:
                GroundPlateNavigation(double yValOfGroundPlate = 0.0);

                void setYValOfGroundPlate(double yVal = 0.0);

                double getYValOfGroundPlate() const;

                double getHeightAboveGroundPlate(const Vector& pos) const;

                bool performRayRequest(int x, int y, SO<Canvas> canv, Vector& hitPoint);

    private:
        double yValOfGroundPlate_;
                SO<RayRequest> request_;                
    };

} // namespace VRS

#endif // VRS_SG_GROUNDPLATENAVIGATION_H

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