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//
//
// $Id$
//
//
// class G4Mag_UsualEqRhs
//
// Class description:
//
// This is the standard right-hand side for equation of motion.
// The only case another is required is when using a moving reference
// frame ... or extending the class to include additional Forces,
// eg an electric field

// History:
// - Created: J. Apostolakis, January 13th 1997.
// --------------------------------------------------------------------

#ifndef G4MAG_USUAL_EQRHS
#define G4MAG_USUAL_EQRHS

#include "G4Mag_EqRhs.hh"
#include "G4ChargeState.hh"

class G4MagneticField;

class G4Mag_UsualEqRhs : public G4Mag_EqRhs
{
   public:  // with description

     G4Mag_UsualEqRhs( G4MagneticField* MagField );
     virtual ~G4Mag_UsualEqRhs();
       // Constructor and destructor. No actions.

     void EvaluateRhsGivenB( const G4double y[],
                             const G4double B[3],
                                   G4double dydx[] ) const;
       // Given the value of the magnetic field B, this function 
       // calculates the value of the derivative dydx.

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

#endif /* G4MAG_USUAL_EQRHS */
