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// $Id$

#ifndef G4DiffractiveExcitation_h
#define G4DiffractiveExcitation_h 1
// ------------------------------------------------------------
//      GEANT 4 class header file
//
//      ---------------- G4DiffractiveExcitation --------------
//             by Gunter Folger, October 1998.
//      diffractive Excitation used by strings models
//	Take a projectile and a target
//	excite the projectile and target
// ------------------------------------------------------------

#include "globals.hh"
class G4VSplitableHadron;
class G4ExcitedString;
#include "G4FTFParameters.hh"
#include "G4ElasticHNScattering.hh"  // Uzhi 3.09.09
#include "G4ThreeVector.hh"

class G4DiffractiveExcitation 
{

  public:

      G4DiffractiveExcitation();
      virtual ~G4DiffractiveExcitation();

      virtual G4bool ExciteParticipants (G4VSplitableHadron *aPartner, 
                                         G4VSplitableHadron * bPartner,
                                         G4FTFParameters *theParameters,
                                         G4ElasticHNScattering *theElastic) const;

      virtual void CreateStrings        (G4VSplitableHadron * aHadron, 
                                         G4bool isProjectile,
                                         G4ExcitedString * &FirstString, 
                                         G4ExcitedString * &SecondString,
                                         G4FTFParameters *theParameters) const;
  private:

      G4DiffractiveExcitation(const G4DiffractiveExcitation &right);
      
      G4ThreeVector GaussianPt(G4double  AveragePt2, G4double maxPtSquare) const;
      G4double ChooseP(G4double Pmin, G4double Pmax) const;
      G4double GetQuarkFractionOfKink(G4double zmin, G4double zmax) const;
      void UnpackMeson( G4int IdPDG, G4int &Q1, G4int &Q2) const;  // Uzhi 7.09.09
      void UnpackBaryon(G4int IdPDG, G4int &Q1, G4int &Q2, G4int &Q3) const; // Uzhi 7.09.09
      G4int NewNucleonId(G4int Q1, G4int Q2, G4int Q3) const; // Uzhi 7.09.09

      const G4DiffractiveExcitation & operator=(const G4DiffractiveExcitation &right);
      int operator==(const G4DiffractiveExcitation &right) const;
      int operator!=(const G4DiffractiveExcitation &right) const;

};

#endif