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G4DormandPrinceRK78.hh
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25 //
26 // G4DormandPrinceRK78
27 //
28 // Class description:
29 //
30 // Dormand-Prince 8(7)13M non-FSAL RK method, a 13 stage embedded
31 // explicit Runge-Kutta method, using a pair of 7th and 8th order formulae.
32 //
33 // Paper proposing this RK scheme:
34 // P.J. Prince, J.R. Dormand, "High order embedded Runge-Kutta formulae",
35 // Journal of Computational and Applied Mathematics, Volume 7, Issue 1, 1981,
36 // Pages 67-75, ISSN 0377-0427, DOI: 10.1016/0771-050X(81)90010-3
37 
38 // Created: Somnath Banerjee, Google Summer of Code 2015, 28 June 2015
39 // Supervision: John Apostolakis, CERN
40 // --------------------------------------------------------------------
41 #ifndef G4DORMAND_PRINCE_RK78_HH
42 #define G4DORMAND_PRINCE_RK78_HH
43 
45 
47 {
48  public:
49 
51  G4int numberOfVariables = 6,
52  G4bool primary = true);
54 
57 
58  void Stepper( const G4double y[],
59  const G4double dydx[],
60  G4double h,
61  G4double yout[],
62  G4double yerr[]) ;
63 
64  G4double DistChord() const;
65  inline G4int IntegratorOrder() const { return 7; }
66 
67  private :
68 
69  G4double *ak2, *ak3, *ak4, *ak5, *ak6, *ak7, *ak8,
70  *ak9, *ak10, *ak11, *ak12, *ak13,
71  *yTemp, *yIn;
72 
76  // For DistChord calculations
77 
79 };
80 
81 #endif