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// $Id: G4ExplicitEuler.hh,v 1.9 2006/06/29 18:22:11 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// class G4ExplicitEuler
//
// Class description:
//
// Explicit Euler stepper for magnetic field: x_1 = x_0 + h * dx_0.
// The most simple approach for solving linear differential equations.
// Take the current derivative and add it to the current position.

// History:
// - Created. W.Wander <wwc@mit.edu>, 12/09/97
// - Adjusted for new Equation classes, J.Apostolakis 5/11/03
// -------------------------------------------------------------------

#ifndef G4EXPLICITEULER_HH
#define G4EXPLICITEULER_HH

#include "G4MagErrorStepper.hh"

class G4ExplicitEuler : public G4MagErrorStepper
{

  public:  // with description

    G4ExplicitEuler(G4EquationOfMotion* EqRhs, G4int numberOfVariables = 6) ;
   ~G4ExplicitEuler();

    void  DumbStepper(  const G4double y[],
                        const G4double dydx[],
                              G4double h,
                              G4double yout[]);

  public:  // without description

    G4int IntegratorOrder() const { return 1; }

};

#endif /* G4EXPLICITEULER_HH */
