Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/include/G4HelixExplicitEuler.hh

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 25 //
 26 // G4HelixExplicitEuler
 27 //
 28 // Class description:
 29 //
 30 // Helix Explicit Euler: x_1 = x_0 + helix(h)
 31 // with helix(h) being a helix piece of length h.
 32 // A simple approach for solving linear differential equations.
 33 // Take the current derivative and add it to the current position.
 34 
 35 // Author: W.Wander <wwc@mit.edu>, 12.09.1997
 36 // -------------------------------------------------------------------
 37 #ifndef G4HELIXEXPLICITEULER_HH
 38 #define G4HELIXEXPLICITEULER_HH
 39 
 40 #include "G4MagHelicalStepper.hh"
 41 
 42 class G4HelixExplicitEuler : public G4MagHelicalStepper
 43 {
 44   public:
 45 
 46     G4HelixExplicitEuler(G4Mag_EqRhs* EqRhs);
 47    ~G4HelixExplicitEuler() override;
 48 
 49     void Stepper( const G4double y[],
 50                   const G4double*,
 51                         G4double h,
 52                         G4double yout[],
 53                         G4double yerr[]  ) override; 
 54 
 55     void DumbStepper( const G4double y[],
 56                             G4ThreeVector  Bfld,
 57                             G4double       h,
 58                             G4double       yout[]) override;
 59    
 60     G4double DistChord() const override;
 61 
 62     inline G4int IntegratorOrder() const override { return 1; }
 63 };
 64 
 65 #endif
 66