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// $Id: G4AdjointTrackingAction.hh 75409 2013-11-01 00:31:00Z ldesorgh$
//
//
//---------------------------------------------------------------
//
// G4AdjointTrackingAction.hh
//
// class description:
//   This class represents actions taken place at the
//   the start/end point of processing one track during an adjoint simulation
//
//---------------------------------------------------------------



#ifndef G4AdjointTrackingAction_h
#define G4AdjointTrackingAction_h 1
#include "globals.hh"
#include "G4UserTrackingAction.hh"
#include "G4ThreeVector.hh"
class G4AdjointSteppingAction;
class G4Track;
///////////////////////////
class G4AdjointTrackingAction : public G4UserTrackingAction
///////////////////////////
{

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

// Constructor & Destructor
   G4AdjointTrackingAction(G4AdjointSteppingAction* anAction);
   virtual ~G4AdjointTrackingAction();

// Member functions
   virtual void PreUserTrackingAction(const G4Track*);
   virtual void PostUserTrackingAction(const G4Track*);
   void RegisterAtEndOfAdjointTrack();

//inline methods
   inline void SetUserForwardTrackingAction(G4UserTrackingAction* anAction){
	   	   	               theUserFwdTrackingAction = anAction;}
   inline G4ThreeVector GetPositionAtEndOfLastAdjointTrack(){ return last_pos;}
   inline G4ThreeVector GetDirectionAtEndOfLastAdjointTrack(){ return last_direction;}
   inline G4double GetEkinAtEndOfLastAdjointTrack(){ return last_ekin;}
   inline G4double GetEkinNucAtEndOfLastAdjointTrack(){ return last_ekin_nuc;}
   inline G4double GetWeightAtEndOfLastAdjointTrack(){return last_weight;}
   inline G4double GetCosthAtEndOfLastAdjointTrack(){return last_cos_th;}
   inline const G4String& GetFwdParticleNameAtEndOfLastAdjointTrack(){return last_fwd_part_name;}
   inline G4int GetFwdParticlePDGEncodingAtEndOfLastAdjointTrack(){return last_fwd_part_PDGEncoding;}


private:
   G4AdjointSteppingAction* theAdjointSteppingAction;
   G4UserTrackingAction* theUserFwdTrackingAction;
   G4bool is_adjoint_tracking_mode;


   //adjoint particle information on the external surface
   //-----------------------------
   G4ThreeVector last_pos;
   G4ThreeVector last_direction;
   G4double last_ekin,last_ekin_nuc; //last_ekin_nuc=last_ekin/nuc, nuc is 1 if not a nucleus
   G4double last_cos_th;
   G4String last_fwd_part_name;
   G4int  last_fwd_part_PDGEncoding;
   G4double last_weight;
   G4int ID_of_last_particle_that_reach_the_ext_source;


};

#endif