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25 // 25 //
26 // G4GeometryTolerance <<
27 // 26 //
28 // Class description: << 27 //
>> 28 // --------------------------------------------------------------------
>> 29 // GEANT 4 class header file
>> 30 //
>> 31 // Class Description:
29 // 32 //
30 // A singleton class for computation and stora 33 // A singleton class for computation and storage of the tolerance values
31 // used by the geometry modeler for precision 34 // used by the geometry modeler for precision on boundaries.
32 // The Cartesian tolerance defines the thickne 35 // The Cartesian tolerance defines the thickness of the surface of the
33 // geometrical shapes for their inner funtions 36 // geometrical shapes for their inner funtions and for the tracking. The
34 // tolerance must be greater than the largest 37 // tolerance must be greater than the largest mathematical error from the
35 // shape distance calculation functions. The t 38 // shape distance calculation functions. The tolerance is centred on the
36 // surface, e.g. the Inside() method of a soli 39 // surface, e.g. the Inside() method of a solid uses a tolerance dx +/- kTol/2.
37 // The Cartesian tolerance can either be set t 40 // The Cartesian tolerance can either be set to a fixed value (1E-9 mm)
38 // or to a value computed on the basis of the 41 // or to a value computed on the basis of the maximum extent of the
39 // world volume assigned through the G4Geometr 42 // world volume assigned through the G4GeometryManager at the beginning
40 // of the application -before- any geometrical 43 // of the application -before- any geometrical object is created.
41 44
42 // ---------------- G4GeometryTolerance - 45 // ---------------- G4GeometryTolerance ----------------
43 // 46 //
44 // Author: G.Cosmo (CERN), 30 October 2006 << 47 // Author: G.Cosmo (CERN), October 2006
45 // ------------------------------------------- << 48 // ------------------------------------------------------------
>> 49
46 #ifndef G4GeometryTolerance_hh 50 #ifndef G4GeometryTolerance_hh
47 #define G4GeometryTolerance_hh 51 #define G4GeometryTolerance_hh
48 52
49 #include "G4Types.hh" 53 #include "G4Types.hh"
50 54
51 class G4GeometryTolerance 55 class G4GeometryTolerance
52 { 56 {
53 friend class G4GeometryManager; 57 friend class G4GeometryManager;
54 58
55 public: // with description << 59 public: // with description
56 static G4GeometryTolerance* GetInstance(); << 60
57 // Get a pointer to the unique G4GeometryTol << 61 static G4GeometryTolerance* GetInstance();
58 // creating it if necessary and setting the << 62 // Get a pointer to the unique G4GeometryTolerance,
59 G4double GetSurfaceTolerance() const; << 63 // creating it if necessary and setting the tolerances.
60 // Returns the current Cartesian tolerance o << 64 G4double GetSurfaceTolerance() const;
61 G4double GetAngularTolerance() const; << 65 // Returns the current Cartesian tolerance of a surface.
62 // Returns the current angular tolerance. << 66 G4double GetAngularTolerance() const;
63 G4double GetRadialTolerance() const; << 67 // Returns the current angular tolerance.
64 // Returns the current radial tolerance. << 68 G4double GetRadialTolerance() const;
65 << 69 // Returns the current radial tolerance.
66 public: // without description << 70
67 ~G4GeometryTolerance() = default; << 71 public: // without description
68 // Destructor. << 72
69 << 73 ~G4GeometryTolerance();
70 protected: << 74 // Destructor.
71 void SetSurfaceTolerance(G4double worldExten << 75
72 // Sets the Cartesian and Radial surface tol << 76 protected:
73 // from the maximum extent of the world volu << 77
74 // can be called only once, and is done only << 78 void SetSurfaceTolerance(G4double worldExtent);
75 // G4GeometryManager class. << 79 // Sets the Cartesian and Radial surface tolerance to a value computed
76 << 80 // from the maximum extent of the world volume. This method
77 G4GeometryTolerance(); << 81 // can be called only once, and is done only through the
78 // Protected constructor. << 82 // G4GeometryManager class.
79 << 83
80 private: << 84 G4GeometryTolerance();
81 static G4ThreadLocal G4GeometryTolerance* fp << 85 // Protected constructor.
82 G4double fCarTolerance; << 86
83 G4double fAngTolerance; << 87 private:
84 G4double fRadTolerance; << 88
85 G4bool fInitialised = false; << 89 static G4ThreadLocal G4GeometryTolerance* fpInstance;
86 }; << 90 G4double fCarTolerance;
>> 91 G4double fAngTolerance;
>> 92 G4double fRadTolerance;
>> 93 G4bool fInitialised;
>> 94 };
>> 95
>> 96 #endif // G4GeometryTolerance_hh
87 97
88 #endif <<
89 98