Geant4  10.02.p01
G4SimpleRunge.hh
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27 // $Id: G4SimpleRunge.hh 66356 2012-12-18 09:02:32Z gcosmo $
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29 //
30 // class G4SimpleRunge
31 //
32 // Class description:
33 //
34 // Simple Runge:
35 //
36 // x_1 = x_0 + h * ( dx( t_0+h/2, x_0 + h/2 * dx( t_0, x_0) ) )
37 //
38 // Second order solver.
39 // Takes the derivative at a position to be assumed at the middle of the
40 // Step and adds it to the current position.
41 
42 // History:
43 // - Created. W.Wander <wwc@mit.edu>, 12/09/97
44 // -------------------------------------------------------------------
45 
46 #ifndef G4SIMPLERUNGE_HH
47 #define G4SIMPLERUNGE_HH
48 
49 #include "G4MagErrorStepper.hh"
50 
52 {
53 
54  public: // with description
55 
56  G4SimpleRunge(G4EquationOfMotion *EquationRhs, G4int numberOfVariables = 6) ;
58  // Constructor and destructor.
59 
60  void DumbStepper( const G4double y[],
61  const G4double dydx[],
62  G4double h,
63  G4double yout[]);
64 
65  public: // without description
66 
67  G4int IntegratorOrder() const { return 2; }
68 
69  private:
70 
72 
75  // scratch space
76 };
77 
78 #endif /* G4SIMPLERUNGE_HH */
G4SimpleRunge(G4EquationOfMotion *EquationRhs, G4int numberOfVariables=6)
G4double * dydxTemp
G4int fNumberOfVariables
int G4int
Definition: G4Types.hh:78
G4double * yTemp
void DumbStepper(const G4double y[], const G4double dydx[], G4double h, G4double yout[])
double G4double
Definition: G4Types.hh:76
G4int IntegratorOrder() const