| [833] | 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4GeometryTolerance.hh,v 1.2 2007/06/18 13:26:40 gcosmo Exp $
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| [1058] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $
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| [833] | 29 | //
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| 30 | // --------------------------------------------------------------------
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| 31 | // GEANT 4 class header file
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| 32 | //
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| 33 | // Class Description:
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| 34 | //
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| 35 | // A singleton class for computation and storage of the tolerance values
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| 36 | // used by the geometry modeler for precision on boundaries.
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| 37 | // The Cartesian tolerance defines the thickness of the surface of the
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| 38 | // geometrical shapes for their inner funtions and for the tracking. The
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| 39 | // tolerance must be greater than the largest mathematical error from the
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| 40 | // shape distance calculation functions. The tolerance is centred on the
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| 41 | // surface, e.g. the Inside() method of a solid uses a tolerance dx +/- kTol/2.
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| 42 | // The Cartesian tolerance can either be set to a fixed value (1E-9 mm)
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| 43 | // or to a value computed on the basis of the maximum extent of the
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| 44 | // world volume assigned through the G4GeometryManager at the beginning
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| 45 | // of the application -before- any geometrical object is created.
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| 46 |
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| 47 | // ---------------- G4GeometryTolerance ----------------
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| 48 | //
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| 49 | // Author: G.Cosmo (CERN), October 2006
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| 50 | // ------------------------------------------------------------
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| 51 |
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| 52 | #ifndef G4GeometryTolerance_hh
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| 53 | #define G4GeometryTolerance_hh
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| 54 |
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| 55 | #include "G4Types.hh"
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| 56 |
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| 57 | class G4GeometryTolerance
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| 58 | {
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| 59 | friend class G4GeometryManager;
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| 60 |
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| 61 | public: // with description
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| 62 |
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| 63 | static G4GeometryTolerance* GetInstance();
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| 64 | // Get a pointer to the unique G4GeometryTolerance,
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| 65 | // creating it if necessary and setting the tolerances.
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| 66 | G4double GetSurfaceTolerance() const;
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| 67 | // Returns the current Cartesian tolerance of a surface.
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| 68 | G4double GetAngularTolerance() const;
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| 69 | // Returns the current angular tolerance.
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| 70 | G4double GetRadialTolerance() const;
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| 71 | // Returns the current radial tolerance.
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| 72 |
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| 73 | protected:
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| 74 |
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| 75 | static void SetSurfaceTolerance(G4double worldExtent);
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| 76 | // Sets the Cartesian surface tolerance to a value computed
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| 77 | // from the maximum extent of the world volume. This method
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| 78 | // can be called only once, and is done only through the
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| 79 | // G4GeometryManager class.
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| 80 |
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| 81 | G4GeometryTolerance();
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| 82 | ~G4GeometryTolerance();
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| 83 | // Protected constructor and destructor.
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| 84 |
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| 85 | private:
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| 86 |
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| 87 | static G4GeometryTolerance* fInstance;
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| 88 | static G4double fCarTolerance;
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| 89 | static G4double fAngTolerance;
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| 90 | static G4double fRadTolerance;
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| 91 | static G4bool fInitialised;
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| 92 | };
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| 93 |
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| 94 | #endif // G4GeometryTolerance_hh
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| 95 |
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