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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 
43 {
44  public: // with description
45 
48 
49  void Stepper( const G4double y[],
50  const G4double*,
51  G4double h,
52  G4double yout[],
53  G4double yerr[] );
54 
55  void DumbStepper( const G4double y[],
56  G4ThreeVector Bfld,
57  G4double h,
58  G4double yout[]);
59 
60  G4double DistChord() const;
61 
62  public: // without description
63 
64  inline G4int IntegratorOrder() const { return 1; }
65 };
66 
67 #endif