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G4MagErrorStepper.hh
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25 //
26 // G4MagErrorStepper
27 //
28 // Class description:
29 //
30 // Abstract base class for integrator of particle's equation of motion,
31 // used in tracking in space dependent magnetic field.
32 
33 // Author: W.Wander <wwc@mit.edu>, 09.12.1997
34 // --------------------------------------------------------------------
35 #ifndef G4MAGERRORSTEPPER_HH
36 #define G4MAGERRORSTEPPER_HH
37 
38 #include "G4Types.hh"
40 #include "G4Mag_EqRhs.hh"
41 #include "G4ThreeVector.hh"
42 
44 {
45  public: // with description
46 
48  G4int numberOfVariables,
49  G4int numStateVariables = 12);
50  virtual ~G4MagErrorStepper();
51 
52  G4MagErrorStepper(const G4MagErrorStepper&) = delete;
54 
55  void Stepper( const G4double y[],
56  const G4double dydx[],
57  G4double h,
58  G4double yout[],
59  G4double yerr[] );
60  // The stepper for the Runge Kutta integration. The stepsize
61  // is fixed, with the Step size given by h.
62  // Integrates ODE starting values y[0 to 6].
63  // Outputs yout[] and its estimated error yerr[].
64 
65  virtual void DumbStepper( const G4double y[],
66  const G4double dydx[],
67  G4double h,
68  G4double yout[] ) = 0;
69  // Performs a 'dump' Step without error calculation.
70 
71  G4double DistChord() const;
72 
73  private:
74 
75  // STATE
77  // Data stored in order to find the chord
78 
79  // Dependent Objects, owned --- part of the STATE
81  // The following arrays are used only for temporary storage
82  // they are allocated at the class level only for efficiency -
83  // so that calls to new and delete are not made in Stepper().
84 };
85 
86 #include "G4MagErrorStepper.icc"
87 
88 #endif