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// $Id: G4FTFModel.hh,v 1.11 2010/09/20 15:50:46 vuzhinsk Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $
//
// Class Description
// Final state production code for hadron inelastic scattering above 20 GeV
// based on the modeling ansatz used in FRITIOF.
// To be used in your physics list in case you need this physics.
// In this case you want to register an object of this class with an object
// of G4TheoFSGenerator. 
// Class Description - End

#ifndef G4FTFModel_h
#define G4FTFModel_h 1

// ------------------------------------------------------------
//      GEANT 4 class header file
//
//      ---------------- G4FTFModel ----------------
//             by Gunter Folger, May 1998.
//       class implementing the excitation in the FTF Parton String Model
// ------------------------------------------------------------


#include "G4VPartonStringModel.hh"

class G4VSplitableHadron;
class G4ExcitedString;

#include "G4FTFParameters.hh"
#include "G4FTFParticipants.hh"

#include "G4ExcitedStringVector.hh"
#include "G4DiffractiveExcitation.hh"
#include "G4ElasticHNScattering.hh"

class G4FTFModel : public G4VPartonStringModel
{

  public:
      G4FTFModel();
      G4FTFModel(G4double , G4double , G4double );
      G4FTFModel(G4DiffractiveExcitation * anExcitation);
      G4FTFModel(const G4FTFModel &right);
      ~G4FTFModel();
      const G4FTFModel & operator=(const G4FTFModel &right);

      int operator==(const G4FTFModel &right) const;
      int operator!=(const G4FTFModel &right) const;

      void Init(const G4Nucleus & aNucleus, const G4DynamicParticle & aProjectile);
      G4ExcitedStringVector * GetStrings();
      G4V3DNucleus * GetWoundedNucleus() const;


  protected:
  
  private:
       void ReggeonCascade();
       G4bool PutOnMassShell();
       G4bool ExciteParticipants();
       G4ExcitedStringVector * BuildStrings();
       void GetResidualNucleus();                  // 23 Oct. 2009
       G4ThreeVector GaussianPt(G4double  AveragePt2, G4double maxPtSquare) const;
  
  private:     

       G4ReactionProduct theProjectile;       
       G4FTFParticipants theParticipants;
       
       G4Nucleon * TheInvolvedNucleon[250];
       G4int NumberOfInvolvedNucleon;

       G4FTFParameters  *theParameters;
       G4DiffractiveExcitation * theExcitation;
       G4ElasticHNScattering   * theElastic;

       G4LorentzVector Residual4Momentum;
       G4double ResidualExcitationEnergy;

};

// ------------------------------------------------------------
inline 
G4V3DNucleus * G4FTFModel::GetWoundedNucleus() const
{
	return theParticipants.GetWoundedNucleus();
}

#endif
