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G4DoLoMcPriRK34.hh
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25 //
26 // G4DoLoMcPriRK34
27 //
28 // Class description:
29 //
30 // Dormand-Lockyer-McGorrigan-Prince-6-3-4 non-FSAL method
31 // ( 6 stage, 3rd & 4th order embedded RK method )
32 
33 // Created: Somnath Banerjee, Google Summer of Code 2015, 7 July 2015
34 // Supervision: John Apostolakis, CERN
35 // --------------------------------------------------------------------
36 #ifndef DOLO_MCPRI_RK34_HH
37 #define DOLO_MCPRI_RK34_HH
38 
40 
42 {
43  public:
44 
46  G4int numberOfVariables = 6,
47  G4bool primary = true );
48  // Constructor using Equation
49 
51 
52  G4DoLoMcPriRK34(const G4DoLoMcPriRK34&) = delete;
53  G4DoLoMcPriRK34& operator=(const G4DoLoMcPriRK34&) = delete;
54  // Copy constructor and assignment operator not allowed
55 
56  void Stepper( const G4double y[],
57  const G4double dydx[],
58  G4double h,
59  G4double yout[],
60  G4double yerr[] ) ;
61 
62  void SetupInterpolation();
63  void SetupInterpolate( const G4double yInput[],
64  const G4double dydx[],
65  const G4double Step );
66  // For Preparing the interpolation and calculating the extra stages
67 
68  void Interpolate( const G4double yInput[],
69  const G4double dydx[],
70  const G4double Step,
71  G4double yOut[],
72  G4double tau );
73  // For calculating the output at the tau fraction of Step
74 
75  void Interpolate( G4double tau,
76  G4double yOut[]);
77 
78  void interpolate(const G4double yInput[],
79  const G4double dydx[],
80  G4double yOut[],
81  G4double Step,
82  G4double tau ) ;
83 
84  G4double DistChord() const;
85  G4int IntegratorOrder() const { return 3; }
86 
87  private :
88 
89  G4double *ak2, *ak3, *ak4, *ak5, *ak6, *yTemp, *yIn;
90 
94  // for DistChord calculations
95 
97 };
98 
99 #endif