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// $Id: G4FTFAnnihilation.hh,v 1.1 2010/12/07 10:42:40 vuzhinsk Exp $

#ifndef G4FTFAnnihilation_h
#define G4FTFAnnihilation_h 1
// ------------------------------------------------------------
//      GEANT 4 class header file
//
//      ---------------- G4FTFAnnihilation       --------------
//             by Vladimir Uzhinsky, November 2010.
//          Annihilation used by Fritiof (FTF) model
//	          Takes a projectile and a target
//	        Produces strings (excited hadrons)
// ------------------------------------------------------------

#include "globals.hh"
class G4VSplitableHadron;
class G4ExcitedString;
#include "G4FTFParameters.hh"
#include "G4ThreeVector.hh"

class G4FTFAnnihilation 
{

  public:

      G4FTFAnnihilation();
      virtual ~G4FTFAnnihilation();

      virtual G4bool         Annihilate (G4VSplitableHadron *aPartner, 
                                         G4VSplitableHadron * bPartner,
                                         G4VSplitableHadron *& AdditionalString,
                                         G4FTFParameters *theParameters) const;

  private:

      G4FTFAnnihilation(const G4FTFAnnihilation &right);
      
      G4ThreeVector GaussianPt(G4double  AveragePt2, G4double maxPtSquare) const;
      G4double ChooseX(G4double Alpha, G4double Beta) const;

      void UnpackBaryon(G4int IdPDG, G4int &Q1, G4int &Q2, G4int &Q3) const;

      const G4FTFAnnihilation & operator=(const G4FTFAnnihilation &right);
      int operator==(const G4FTFAnnihilation &right) const;
      int operator!=(const G4FTFAnnihilation &right) const;

};

#endif