G4INCLIFunction1D.hh

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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"

#ifndef G4INCLIFUNCTION1D_HH_
#define G4INCLIFUNCTION1D_HH_ 1

#include <vector>

namespace G4INCL {

  // Forward declaration
  class InverseInterpolationTable;

  class IFunction1D {
    public:
      IFunction1D() :
        xMin(0.),
        xMax(0.)
    {};
      IFunction1D(const G4double x0, const G4double x1) :
        xMin(x0),
        xMax(x1)
    {};

      virtual ~IFunction1D() {};

      virtual inline G4double getXMinimum() const { return xMin; }

      virtual inline G4double getXMaximum() const { return xMax; }

      virtual G4double operator()(const G4double x) const = 0;

      virtual G4double integrate(const G4double x0, const G4double x1, const G4double step=-1.) const;

      IFunction1D *primitive() const;

      InverseInterpolationTable *inverseCDFTable(const G4int nNodes=60) const;

    protected:
      G4double xMin;
      G4double xMax;

    private:
      static const G4double integrationCoefficients[];
  };

}

#endif // G4INCLIFUNCTION1D_HH_

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