Gabriele Cosmo
89 lines
3.8 KiB
C++
89 lines
3.8 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4GeometryTolerance
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//
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// Class description:
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//
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// A singleton class for computation and storage of the tolerance values
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// used by the geometry modeler for precision on boundaries.
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// The Cartesian tolerance defines the thickness of the surface of the
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// geometrical shapes for their inner funtions and for the tracking. The
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// tolerance must be greater than the largest mathematical error from the
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// shape distance calculation functions. The tolerance is centred on the
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// surface, e.g. the Inside() method of a solid uses a tolerance dx +/- kTol/2.
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// The Cartesian tolerance can either be set to a fixed value (1E-9 mm)
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// or to a value computed on the basis of the maximum extent of the
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// world volume assigned through the G4GeometryManager at the beginning
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// of the application -before- any geometrical object is created.
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// ---------------- G4GeometryTolerance ----------------
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//
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// Author: G.Cosmo (CERN), 30 October 2006
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// --------------------------------------------------------------------
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#ifndef G4GeometryTolerance_hh
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#define G4GeometryTolerance_hh
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#include "G4Types.hh"
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class G4GeometryTolerance
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{
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friend class G4GeometryManager;
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public: // with description
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static G4GeometryTolerance* GetInstance();
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// Get a pointer to the unique G4GeometryTolerance,
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// creating it if necessary and setting the tolerances.
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G4double GetSurfaceTolerance() const;
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// Returns the current Cartesian tolerance of a surface.
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G4double GetAngularTolerance() const;
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// Returns the current angular tolerance.
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G4double GetRadialTolerance() const;
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// Returns the current radial tolerance.
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public: // without description
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~G4GeometryTolerance() = default;
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// Destructor.
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protected:
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void SetSurfaceTolerance(G4double worldExtent);
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// Sets the Cartesian and Radial surface tolerance to a value computed
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// from the maximum extent of the world volume. This method
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// can be called only once, and is done only through the
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// G4GeometryManager class.
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G4GeometryTolerance();
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// Protected constructor.
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private:
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static G4ThreadLocal G4GeometryTolerance* fpInstance;
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G4double fCarTolerance;
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G4double fAngTolerance;
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G4double fRadTolerance;
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G4bool fInitialised = false;
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};
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#endif
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