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//
// G4MonopoleEq
//
// Class description:
//
// This is the right-hand side of equation of motion for monopole
// in a combined electric and magnetic field:
// d(p_c)/ds=g{c-energyB_ - p_c x E}/pc

// Created: V.Grichine, 17.11.2009
// -------------------------------------------------------------------
#ifndef G4EQMAGELECTRICFIELD_HH
#define G4EQMAGELECTRICFIELD_HH

#include "G4ChargeState.hh"
#include "G4EquationOfMotion.hh"
#include "G4ElectroMagneticField.hh"

class G4MonopoleEq : public G4EquationOfMotion
{
  public:  // with description

    G4MonopoleEq(G4ElectroMagneticField* emField );

    ~G4MonopoleEq();

    void  SetChargeMomentumMass(G4ChargeState particleCharge,
                                G4double MomentumXc,
                                G4double mass);

    void EvaluateRhsGivenB(const G4double y[],
                           const G4double Field[],
                                 G4double dydx[] ) const;
      // Given the value of the electromagnetic field, this function 
      // calculates the value of the derivative dydx.

  private:

    G4double fElectroMagCof = 0.0;
    G4double fMassCof = 0.0;
};

#endif
