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// -------------------------------------------------------------------
//      GEANT 4 class header file 
//
//      CERN, Geneva, Switzerland
//
//      File name:     G4KM_NucleonEqRhs.hh
//
//      Author:        Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
// 
//      Creation date: 5 June 2000
// -------------------------------------------------------------------

#ifndef G4KM_NucleonEqRhs_hh
#define G4KM_NucleonEqRhs_hh

#include "globals.hh"
//#include "G4EquationOfMotion.hh"
#include "G4Mag_EqRhs.hh"
#include "G4KM_DummyField.hh" // needed by G4Mag_EqRhs constructor.
#include "G4V3DNucleus.hh"

//class G4KM_NucleonEqRhs : public G4EquationOfMotion // I'd like
class G4KM_NucleonEqRhs : public G4Mag_EqRhs
{

public:
  G4KM_NucleonEqRhs(G4KM_DummyField *field, G4V3DNucleus * nucleus);
  ~G4KM_NucleonEqRhs();

  virtual void EvaluateRhsGivenB(const G4double y[], const G4double B[3],
				 G4double dydx[]) const;
  virtual void SetChargeMomentumMass(G4double particleCharge,
				     G4double MomentumXc,
				     G4double MassXc2);
  void SetMass(G4double aMass);

private:

// use G4VKM_NuclearDensity as it needs a GetDeriv() method.
  G4V3DNucleus * theNucleus;
  G4double factor;
  G4int A;
  G4double theMass;
};



inline void G4KM_NucleonEqRhs::SetMass(G4double aMass)
{
  theMass = aMass;
}



inline G4KM_NucleonEqRhs::~G4KM_NucleonEqRhs()
{ }


// Here by design, but it is unnecessary for nuclear fields
inline void
G4KM_NucleonEqRhs::SetChargeMomentumMass(G4double ,G4double ,G4double )
{ }

#endif