include/Geant4/G4ExplicitEuler.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 // G4ExplicitEuler
0027 //
0028 // Class description:
0029 //
0030 // Explicit Euler stepper for magnetic field: x_1 = x_0 + h * dx_0.
0031 // The most simple approach for solving linear differential equations.
0032 // Take the current derivative and add it to the current position.
0033
0034 // Created: W.Wander <wwc@mit.edu>, 12.09.1997
0035 // -------------------------------------------------------------------
0036 #ifndef G4EXPLICITEULER_HH
0037 #define G4EXPLICITEULER_HH
0038
0039 #include "G4MagErrorStepper.hh"
0040
0041 class G4ExplicitEuler : public G4MagErrorStepper
0042 {
0043   public:
0044
0045     G4ExplicitEuler(G4EquationOfMotion* EqRhs, G4int numberOfVariables = 6) ;
0046    ~G4ExplicitEuler() override;
0047
0048     void  DumbStepper( const G4double y[],
0049                        const G4double dydx[],
0050                              G4double h,
0051                              G4double yout[] ) override;
0052
0053     G4int IntegratorOrder() const override { return 1; }
0054 };
0055
0056 #endif