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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

/** \file G4INCLICrossSections.hh
 * \brief Abstract interface for the cross-section classes
 *
 * \date 25nd October 2013
 * \author Davide Mancusi
 */

#ifndef G4INCLICROSSSECTIONS_HH
#define G4INCLICROSSSECTIONS_HH

#include "G4INCLParticle.hh"

namespace G4INCL {
  /// \brief Abstract interface for the cross-section classes
  class ICrossSections {
    public:

      ICrossSections() {}
      virtual ~ICrossSections() {}

      /// \brief Elastic particle-particle cross section
      virtual G4double elastic(Particle const * const p1, Particle const * const p2) = 0;

      /// \brief Total (elastic+inelastic) particle-particle cross section
      virtual G4double total(Particle const * const p1, Particle const * const p2) = 0;

      /// \brief Total (elastic+inelastic) pion-nucleon cross section
      virtual G4double pionNucleon(Particle const * const p1, Particle const * const p2) = 0;

      /// \brief Cross section for NDelta->NN
      virtual G4double recombination(Particle const * const p1, Particle const * const p2) = 0;

      /// \brief Cross section for NN->NDelta
      virtual G4double deltaProduction(Particle const * const p1, Particle const * const p2) = 0;

      /** \brief Calculate the slope of the NN DDXS.
       *
       * \param energyCM energy in the CM frame, in MeV
       * \param iso total isospin of the system
       *
       * \return the slope of the angular distribution
       */
      virtual G4double calculateNNAngularSlope(G4double energyCM, G4int iso) = 0;

  };
}

#endif