//
// ********************************************************************
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// *                                                                  *
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//
//
// $Id: G4VTrajectoryPoint.hh,v 1.9 2002/10/28 11:10:58 johna Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
//
//---------------------------------------------------------------
//
// G4VTrajectoryPoint.hh
//
// class description:
//   This class is the abstract base class which represents the point
//   which consists of a trajectory.
//   It includes information of a the point.
//
// ---------------------------------------------------------------

#ifndef G4VTrajectoryPoint_h
#define G4VTrajectoryPoint_h 1

#include "globals.hh"
#include "g4std/vector"
#include "g4std/map"
#include "G4ThreeVector.hh"

class G4AttDef;
class G4AttValue;

class G4VTrajectoryPoint
{
 public: // with description

 // Constructor/Destructor
   G4VTrajectoryPoint() {;}
   virtual ~G4VTrajectoryPoint() {;}

 // Operators
   inline int operator==(const G4VTrajectoryPoint& right) const
   { return (this==&right); };

 // Get/Set functions
   virtual const G4ThreeVector GetPosition() const = 0;

 // Get method for a vector of auxiliary points
   virtual const G4std::vector<G4ThreeVector>* GetAuxiliaryPoints() const
   { return 0; }
   // If implemented by a derived class, returns a pointer to a list
   // of auxiliary points, e.g., intermediate points used during the
   // calculation of the step that can be used for drawing a smoother
   // trajectory.  The user must test the validity of this pointer.

 // Get method for HEPRep style attribute definitions
   virtual const G4std::map<G4String,G4AttDef>* GetAttDefs() const
   { return 0; }
   // If implemented by a derived class, returns a pointer to a map of
   // attribute definitions for the attribute values below.  The user
   // must test the validity of this pointer.

 // Get method for HEPRep style attribute values
   virtual G4std::vector<G4AttValue>* CreateAttValues() const
   { return 0; }
   // If implemented by a derived class, returns a pointer to a list
   // of attribute values suitable, e.g., for picking.  Each must
   // refer to an attribute definition in the above map; its name is
   // the key.  The user must test the validity of this pointer and
   // delete the list after use.

};

#endif