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25 // 25 //
26 // G4HelixImplicitEuler << 26 //
>> 27 // $Id: G4HelixImplicitEuler.hh 66356 2012-12-18 09:02:32Z gcosmo $
>> 28 //
>> 29 //
>> 30 // class G4HelixImplicitEuler
27 // 31 //
28 // Class description: 32 // Class description:
29 // 33 //
30 // Helix Implicit Euler stepper for magnetic 34 // Helix Implicit Euler stepper for magnetic field:
31 // x_1 = x_0 + 1/2 * ( helix(h,t_0,x_0) 35 // x_1 = x_0 + 1/2 * ( helix(h,t_0,x_0)
32 // + helix(h,t_0+h,x_ 36 // + helix(h,t_0+h,x_0+helix(h,t0,x0) ) )
33 // Second order solver. 37 // Second order solver.
34 // Take the current derivative and add it to 38 // Take the current derivative and add it to the current position.
35 // Take the output and its derivative. Add th 39 // Take the output and its derivative. Add the mean of both derivatives
36 // to form the final output. 40 // to form the final output.
37 41
38 // Author: W.Wander <wwc@mit.edu>, 03/11/1998 << 42 // History:
>> 43 // - Created. W.Wander <wwc@mit.edu>, 03/11/98
39 // ------------------------------------------- 44 // -------------------------------------------------------------------
>> 45
40 #ifndef G4HELIXIMPLICITEULER_HH 46 #ifndef G4HELIXIMPLICITEULER_HH
41 #define G4HELIXIMPLICITEULER_HH 47 #define G4HELIXIMPLICITEULER_HH
42 48
43 #include "G4MagHelicalStepper.hh" 49 #include "G4MagHelicalStepper.hh"
44 50
45 class G4HelixImplicitEuler : public G4MagHelic 51 class G4HelixImplicitEuler : public G4MagHelicalStepper
46 { 52 {
47 public: <<
48 53
49 G4HelixImplicitEuler(G4Mag_EqRhs *EqRhs); << 54 public: // with description
50 ~G4HelixImplicitEuler() override; << 55
>> 56 G4HelixImplicitEuler(G4Mag_EqRhs *EqRhs)
>> 57 : G4MagHelicalStepper(EqRhs) {}
>> 58
>> 59 ~G4HelixImplicitEuler() {}
51 60
52 void DumbStepper( const G4double y[], 61 void DumbStepper( const G4double y[],
53 G4ThreeVector Bfld << 62 G4ThreeVector Bfld,
54 G4double h, << 63 G4double h,
55 G4double yout << 64 G4double yout[]);
56 65
57 inline G4int IntegratorOrder() const overr << 66 public: // without description
>> 67
>> 68 G4int IntegratorOrder() const { return 2; }
58 }; 69 };
59 70
60 #endif << 71 #endif /* G4HELIXIMPLICITEULER_HH */
61 72