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//
// $Id: G4Trajectory.hh 69003 2013-04-15 09:25:23Z gcosmo $
//
//---------------------------------------------------------------
//
// G4Trajectory.hh
//
// class description:
//   This class represents the trajectory of a particle tracked.
//   It includes information of 
//     1) List of trajectory points which compose the trajectory,
//     2) static information of particle which generated the 
//        trajectory, 
//     3) trackID and parent particle ID of the trajectory,
//
// Contact:
//   Questions and comments to this code should be sent to
//     Katsuya Amako  (e-mail: Katsuya.Amako@kek.jp)
//     Makoto  Asai   (e-mail: asai@kekvax.kek.jp)
//     Takashi Sasaki (e-mail: Takashi.Sasaki@kek.jp)
//
// ---------------------------------------------------------------

class G4Trajectory;

#ifndef G4Trajectory_h
#define G4Trajectory_h 1

#include <stdlib.h>                 // Include from 'system'
#include <vector>

#include "trkgdefs.hh"
#include "G4VTrajectory.hh"
#include "G4Allocator.hh"
#include "G4ios.hh"                 // Include from 'system'
#include "globals.hh"               // Include from 'global'
#include "G4ParticleDefinition.hh"  // Include from 'particle+matter'
#include "G4TrajectoryPoint.hh"     // Include from 'tracking'
#include "G4Track.hh"
#include "G4Step.hh"

class G4Polyline;                   // Forward declaration

typedef std::vector<G4VTrajectoryPoint*>  TrajectoryPointContainer;

///////////////////
class G4Trajectory : public G4VTrajectory
///////////////////
{

//--------
public: // with description
//--------

// Constructor/Destrcutor

   G4Trajectory();

   G4Trajectory(const G4Track* aTrack);
   G4Trajectory(G4Trajectory &);
   virtual ~G4Trajectory();

// Operators
   inline void* operator new(size_t);
   inline void  operator delete(void*);
   inline int operator == (const G4Trajectory& right) const
   {return (this==&right);} 

// Get/Set functions 
   inline G4int GetTrackID() const
   { return fTrackID; }
   inline G4int GetParentID() const
   { return fParentID; }
   inline G4String GetParticleName() const
   { return ParticleName; }
   inline G4double GetCharge() const
   { return PDGCharge; }
   inline G4int GetPDGEncoding() const
   { return PDGEncoding; }
   inline G4double GetInitialKineticEnergy() const
   { return initialKineticEnergy; }
   inline G4ThreeVector GetInitialMomentum() const
   { return initialMomentum; }

// Other member functions
   virtual void ShowTrajectory(std::ostream& os=G4cout) const;
   virtual void DrawTrajectory() const;
   virtual void AppendStep(const G4Step* aStep);
   virtual int GetPointEntries() const { return positionRecord->size(); }
   virtual G4VTrajectoryPoint* GetPoint(G4int i) const 
   { return (*positionRecord)[i]; }
   virtual void MergeTrajectory(G4VTrajectory* secondTrajectory);

   G4ParticleDefinition* GetParticleDefinition();

   virtual const std::map<G4String,G4AttDef>* GetAttDefs() const;
   virtual std::vector<G4AttValue>* CreateAttValues() const;

//---------
   private:
//---------

  TrajectoryPointContainer* positionRecord;
  G4int                     fTrackID;
  G4int                     fParentID;
  G4int                     PDGEncoding;
  G4double                  PDGCharge;
  G4String                  ParticleName;
  G4double                  initialKineticEnergy;
  G4ThreeVector             initialMomentum;

};

extern G4TRACKING_DLL G4ThreadLocal
G4Allocator<G4Trajectory> *aTrajectoryAllocator;

inline void* G4Trajectory::operator new(size_t)
{
  if (!aTrajectoryAllocator)
  { aTrajectoryAllocator = new G4Allocator<G4Trajectory>; }
  return (void*)aTrajectoryAllocator->MallocSingle();
}

inline void G4Trajectory::operator delete(void* aTrajectory)
{
  aTrajectoryAllocator->FreeSingle((G4Trajectory*)aTrajectory);
}

#endif
