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25 // 25 //
26 // G4GeometryTolerance <<
27 // 26 //
28 // Class description: << 27 // $Id: G4GeometryTolerance.hh,v 1.2 2007/06/18 13:26:40 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-02 $
>> 29 //
>> 30 // --------------------------------------------------------------------
>> 31 // GEANT 4 class header file
>> 32 //
>> 33 // Class Description:
29 // 34 //
30 // A singleton class for computation and stora 35 // A singleton class for computation and storage of the tolerance values
31 // used by the geometry modeler for precision 36 // used by the geometry modeler for precision on boundaries.
32 // The Cartesian tolerance defines the thickne 37 // The Cartesian tolerance defines the thickness of the surface of the
33 // geometrical shapes for their inner funtions 38 // geometrical shapes for their inner funtions and for the tracking. The
34 // tolerance must be greater than the largest 39 // tolerance must be greater than the largest mathematical error from the
35 // shape distance calculation functions. The t 40 // shape distance calculation functions. The tolerance is centred on the
36 // surface, e.g. the Inside() method of a soli 41 // surface, e.g. the Inside() method of a solid uses a tolerance dx +/- kTol/2.
37 // The Cartesian tolerance can either be set t 42 // 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 43 // or to a value computed on the basis of the maximum extent of the
39 // world volume assigned through the G4Geometr 44 // world volume assigned through the G4GeometryManager at the beginning
40 // of the application -before- any geometrical 45 // of the application -before- any geometrical object is created.
41 46
42 // ---------------- G4GeometryTolerance - 47 // ---------------- G4GeometryTolerance ----------------
43 // 48 //
44 // Author: G.Cosmo (CERN), 30 October 2006 << 49 // Author: G.Cosmo (CERN), October 2006
45 // ------------------------------------------- << 50 // ------------------------------------------------------------
>> 51
46 #ifndef G4GeometryTolerance_hh 52 #ifndef G4GeometryTolerance_hh
47 #define G4GeometryTolerance_hh 53 #define G4GeometryTolerance_hh
48 54
49 #include "G4Types.hh" 55 #include "G4Types.hh"
50 56
51 class G4GeometryTolerance 57 class G4GeometryTolerance
52 { 58 {
53 friend class G4GeometryManager; 59 friend class G4GeometryManager;
54 60
55 public: // with description << 61 public: // with description
56 static G4GeometryTolerance* GetInstance(); << 62
57 // Get a pointer to the unique G4GeometryTol << 63 static G4GeometryTolerance* GetInstance();
58 // creating it if necessary and setting the << 64 // Get a pointer to the unique G4GeometryTolerance,
59 G4double GetSurfaceTolerance() const; << 65 // creating it if necessary and setting the tolerances.
60 // Returns the current Cartesian tolerance o << 66 G4double GetSurfaceTolerance() const;
61 G4double GetAngularTolerance() const; << 67 // Returns the current Cartesian tolerance of a surface.
62 // Returns the current angular tolerance. << 68 G4double GetAngularTolerance() const;
63 G4double GetRadialTolerance() const; << 69 // Returns the current angular tolerance.
64 // Returns the current radial tolerance. << 70 G4double GetRadialTolerance() const;
65 << 71 // Returns the current radial tolerance.
66 public: // without description << 72
67 ~G4GeometryTolerance() = default; << 73 protected:
68 // Destructor. << 74
69 << 75 static void SetSurfaceTolerance(G4double worldExtent);
70 protected: << 76 // Sets the Cartesian surface tolerance to a value computed
71 void SetSurfaceTolerance(G4double worldExten << 77 // from the maximum extent of the world volume. This method
72 // Sets the Cartesian and Radial surface tol << 78 // can be called only once, and is done only through the
73 // from the maximum extent of the world volu << 79 // G4GeometryManager class.
74 // can be called only once, and is done only << 80
75 // G4GeometryManager class. << 81 G4GeometryTolerance();
76 << 82 ~G4GeometryTolerance();
77 G4GeometryTolerance(); << 83 // Protected constructor and destructor.
78 // Protected constructor. << 84
79 << 85 private:
80 private: << 86
81 static G4ThreadLocal G4GeometryTolerance* fp << 87 static G4GeometryTolerance* fInstance;
82 G4double fCarTolerance; << 88 static G4double fCarTolerance;
83 G4double fAngTolerance; << 89 static G4double fAngTolerance;
84 G4double fRadTolerance; << 90 static G4double fRadTolerance;
85 G4bool fInitialised = false; << 91 static G4bool fInitialised;
86 }; << 92 };
>> 93
>> 94 #endif // G4GeometryTolerance_hh
87 95
88 #endif <<
89 96