Geant4  10.02
G4HelixImplicitEuler.hh
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27 // $Id: G4HelixImplicitEuler.hh 66356 2012-12-18 09:02:32Z gcosmo $
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29 //
30 // class G4HelixImplicitEuler
31 //
32 // Class description:
33 //
34 // Helix Implicit Euler stepper for magnetic field:
35 // x_1 = x_0 + 1/2 * ( helix(h,t_0,x_0)
36 // + helix(h,t_0+h,x_0+helix(h,t0,x0) ) )
37 // Second order solver.
38 // Take the current derivative and add it to the current position.
39 // Take the output and its derivative. Add the mean of both derivatives
40 // to form the final output.
41 
42 // History:
43 // - Created. W.Wander <wwc@mit.edu>, 03/11/98
44 // -------------------------------------------------------------------
45 
46 #ifndef G4HELIXIMPLICITEULER_HH
47 #define G4HELIXIMPLICITEULER_HH
48 
49 #include "G4MagHelicalStepper.hh"
50 
52 {
53 
54  public: // with description
55 
57  : G4MagHelicalStepper(EqRhs) {}
58 
60 
61  void DumbStepper( const G4double y[],
62  G4ThreeVector Bfld,
63  G4double h,
64  G4double yout[]);
65 
66  public: // without description
67 
68  G4int IntegratorOrder() const { return 2; }
69 };
70 
71 #endif /* G4HELIXIMPLICITEULER_HH */
CLHEP::Hep3Vector G4ThreeVector
int G4int
Definition: G4Types.hh:78
G4HelixImplicitEuler(G4Mag_EqRhs *EqRhs)
void DumbStepper(const G4double y[], G4ThreeVector Bfld, G4double h, G4double yout[])
double G4double
Definition: G4Types.hh:76
G4int IntegratorOrder() const