include/Geant4/G4HelixExplicitEuler.hh

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0025 //
0026 // G4HelixExplicitEuler
0027 //
0028 // Class description:
0029 //
0030 // Helix Explicit Euler: x_1 = x_0 + helix(h)
0031 // with helix(h) being a helix piece of length h.
0032 // A simple approach for solving linear differential equations.
0033 // Take the current derivative and add it to the current position.
0034
0035 // Author: W.Wander <wwc@mit.edu>, 12.09.1997
0036 // -------------------------------------------------------------------
0037 #ifndef G4HELIXEXPLICITEULER_HH
0038 #define G4HELIXEXPLICITEULER_HH
0039
0040 #include "G4MagHelicalStepper.hh"
0041
0042 class G4HelixExplicitEuler : public G4MagHelicalStepper
0043 {
0044   public:
0045
0046     G4HelixExplicitEuler(G4Mag_EqRhs* EqRhs);
0047    ~G4HelixExplicitEuler() override;
0048
0049     void Stepper( const G4double y[],
0050                   const G4double*,
0051                         G4double h,
0052                         G4double yout[],
0053                         G4double yerr[]  ) override;
0054
0055     void DumbStepper( const G4double y[],
0056                             G4ThreeVector  Bfld,
0057                             G4double       h,
0058                             G4double       yout[]) override;
0059
0060     G4double DistChord() const override;
0061
0062     inline G4int IntegratorOrder() const override { return 1; }
0063 };
0064
0065 #endif