VRS - The Virtual Rendering System

version 3.3

pathnavigation.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2004 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: pathnavigation.h 6014 2007-08-09 07:51:16Z Konstantin_Baumann $
// $Date: 2007-08-09 09:51:16 +0200 (Thu, 09 Aug 2007) $
// $Revision: 6014 $
// $State$
// $Author: Konstantin_Baumann $
//
// $Log$
// Revision 1.7  2005/09/09 13:53:45  lorenz
// Added method playing()
//
// Revision 1.6  2005/01/03 01:43:10  klimetschek
// - modified win32 project layout, splitted vrs.vcproj into vrs_container, vrs_core, vrs_sg, vrs_image, vrs_opengl and vrs_io
// - removed vrs.vcproj
// minor things:
// - added all glutexamples to vrs4glut.sln
// - fixed some problems in glutexamples
// - removed all project references from all VS projects (using solution wide project dependencies instead)
//
// Revision 1.5  2004/10/28 14:16:01  basch
// Class comment changed (Doxygen style)
//
// Revision 1.4  2004/10/07 16:57:08  buchholz
//  - ascii-pathfile export added
//
// Revision 1.3  2004/06/16 18:08:57  buchholz
// timing adapted to support non-realtime clocks
//
// Revision 1.2  2004/03/12 16:28:41  baumann
// macros VRS_NAMESPACE_BEGIN/_END expanded and removed
//
// Revision 1.1  2004/02/24 16:17:22  buchholz
// initial check-in
//

#ifndef VRS_SG_PATHNAVIGATION_H
#define VRS_SG_PATHNAVIGATION_H

#include <vrs/sg/navigation.h>
#include <vrs/vector.h>

namespace VRS {

class DirectionInterpolator;
class JumpNavigation;
class ButtonEvent;
class MotionEvent;
class TimeEvent;
class Event;
class Bezier;
class LookAt;

class VRS_CORE_API PathNavigation : public Navigation {

public:
    
    PathNavigation(Vector onPlane, LookAt* lookAt);
    virtual ~PathNavigation();
    
        void setPath(Iterator<Vector>* keyPositions, Iterator<Vector>* keyDirections);
    bool startPossible() const;
        void gotoStart();
    void startPath();
    bool playing();
    void setJumpNavigation(JumpNavigation* jumpNav);
    void setSpeedParameters(double accel, double maxSpeed);
    void setTangentLength(double tangentLength);
    void enableKeys(unsigned char recordKey, unsigned char startKey, unsigned char clearKey);
    void disableKeys();
    virtual BehaviorNode::InvalidationHint handle(Event*);    
    void setLoopEnable(bool enabled);
    void savePath(const std::string& fileName);
    void loadPath(const std::string& fileName);
    void enableLoadSaveKeys(const std::string& filename, unsigned char loadKey, unsigned char saveKey);
    void disableLoadSaveKeys();
    VRS_SERIALIZABLE(PathNavigation);
    VRS_TYPEINFO(PathNavigation, Navigation);
  
private:

    PathNavigation();

    BehaviorNode::InvalidationHint onTimer(TimeEvent* e);
    
    SO<JumpNavigation> jumper_;
    SO<Array<SO<Bezier> > > path_;
    SO<LookAt> lookAt_;
        SO<DirectionInterpolator> interpol_;
        SO<Iterator<Vector> > dirs_;

    SO<Array<Vector> > arrayPos_;
    SO<Array<Vector> > arrayDir_;

    UINT section_;
        double localParam_;
    double speed_;          // units per cycle
    double acceleration_;   // units per cycle^2
    double maxSpeed_;   
    double rotationSpeed_;  // degrees per cycle
    double tangentLength_;

    bool jumping_;
    bool pathActive_;
    bool enableLoop_;
    
    bool enableKeys_;
    unsigned char recordKey_;
    unsigned char startKey_;
    unsigned char clearKey_;

    double elapsedTime_;

    // for loading and saving the path as ASCII
    static std::string KeyString;
    static std::string PathHeaderString;
    std::string pathASCIIFileName_;
    unsigned char loadKey_;
    unsigned char saveKey_;
    bool loadSaveEnabled_;    
    
};

} // namespace VRS

#endif // VRS_SG_PATHNAVIGATION_H

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