Gabriele Cosmo
236 lines
8.3 KiB
C++
236 lines
8.3 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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// G4EllipticalTube
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//
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// Class description:
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//
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// A tube with elliptical cross section:
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//
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// G4EllipticalTube( const G4String& name,
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// G4double Dx,
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// G4double Dy,
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// G4double Dz )
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//
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// The equation of the lateral surface is: (x/dx)^2 + (y/dy)^2 = 1
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// Author: David C. Williams (UCSC), 29.03.2000 - First implementation
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// Evgueni Tcherniaev (CERN), 23.12.2019 - Revised
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// --------------------------------------------------------------------
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#ifndef G4ELLIPTICALTUBE_HH
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#define G4ELLIPTICALTUBE_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_UELLIPTICALTUBE 1
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#endif
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#if (defined(G4GEOM_USE_UELLIPTICALTUBE) && defined(G4GEOM_USE_SYS_USOLIDS))
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#define G4UEllipticalTube G4EllipticalTube
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#include "G4UEllipticalTube.hh"
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#else
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#include "G4VSolid.hh"
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#include "G4Polyhedron.hh"
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/**
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* @brief G4EllipticalTube is a tube with elliptical cross section.
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* The equation of the lateral surface is: (x/dx)^2 + (y/dy)^2 = 1.
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*/
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class G4EllipticalTube : public G4VSolid
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{
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public:
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/**
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* Constructs an elliptical tube, given its parameters.
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* @param[in] name The solid name.
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* @param[in] Dx Half length of axis along X.
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* @param[in] Dy Half length of axis along Y.
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* @param[in] Dz Half length in Z.
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*/
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G4EllipticalTube( const G4String& name,
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G4double Dx,
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G4double Dy,
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G4double Dz );
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/**
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* Destructor.
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*/
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~G4EllipticalTube() override;
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/**
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* Accessors.
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*/
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inline G4double GetDx() const;
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inline G4double GetDy() const;
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inline G4double GetDz() const;
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/**
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* Modifiers.
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*/
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inline void SetDx( G4double Dx );
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inline void SetDy( G4double Dy );
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inline void SetDz( G4double Dz );
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/**
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* Computes the bounding limits of the solid.
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* @param[out] pMin The minimum bounding limit point.
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* @param[out] pMax The maximum bounding limit point.
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*/
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void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const override;
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/**
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* Calculates the minimum and maximum extent of the solid, when under the
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* specified transform, and within the specified limits.
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* @param[in] pAxis The axis along which compute the extent.
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* @param[in] pVoxelLimit The limiting space dictated by voxels.
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* @param[in] pTransform The internal transformation applied to the solid.
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* @param[out] pMin The minimum extent value.
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* @param[out] pMax The maximum extent value.
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* @returns True if the solid is intersected by the extent region.
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*/
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G4bool CalculateExtent(const EAxis pAxis,
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const G4VoxelLimits& pVoxelLimit,
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const G4AffineTransform& pTransform,
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G4double& pmin, G4double& pmax) const override;
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/**
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* Concrete implementations of the expected query interfaces for
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* solids, as defined in the base class G4VSolid.
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*/
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EInside Inside( const G4ThreeVector& p ) const override;
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G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const override;
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G4double DistanceToIn( const G4ThreeVector& p,
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const G4ThreeVector& v ) const override;
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G4double DistanceToIn( const G4ThreeVector& p ) const override;
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G4double DistanceToOut( const G4ThreeVector& p,
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const G4ThreeVector& v,
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const G4bool calcNorm = false,
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G4bool* validNorm = nullptr,
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G4ThreeVector* n = nullptr ) const override;
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G4double DistanceToOut( const G4ThreeVector& p ) const override;
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/**
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* Returns the type ID, "G4EllipticalTube" of the solid.
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*/
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G4GeometryType GetEntityType() const override;
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/**
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* Makes a clone of the object for use in multi-treading.
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* @returns A pointer to the new cloned allocated solid.
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*/
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G4VSolid* Clone() const override;
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/**
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* Streams the object contents to an output stream.
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*/
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std::ostream& StreamInfo(std::ostream& os) const override;
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/**
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* Returning an estimation of the solid volume (capacity) and
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* surface area, in internal units.
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*/
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G4double GetCubicVolume() override;
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G4double GetSurfaceArea() override;
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/**
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* Returns a random point located and uniformly distributed on the
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* surface of the solid.
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*/
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G4ThreeVector GetPointOnSurface() const override;
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/**
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* Methods for creating graphical representations (i.e. for visualisation).
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*/
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G4Polyhedron* CreatePolyhedron() const override;
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G4Polyhedron* GetPolyhedron() const override;
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void DescribeYourselfTo( G4VGraphicsScene& scene ) const override;
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G4VisExtent GetExtent() const override;
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/**
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* Fake default constructor for usage restricted to direct object
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* persistency for clients requiring preallocation of memory for
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* persistifiable objects.
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*/
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G4EllipticalTube(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4EllipticalTube(const G4EllipticalTube& rhs);
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G4EllipticalTube& operator=(const G4EllipticalTube& rhs);
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private:
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/**
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* Checks parameters and sets pre-calculated values.
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*/
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void CheckParameters();
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/**
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* Algorithm for SurfaceNormal() following the original
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* specification for points not on the surface.
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*/
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G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p ) const;
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/**
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* Calculates the surface area and caches it.
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*/
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G4double GetCachedSurfaceArea() const;
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private:
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G4double halfTolerance;
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G4double fDx; // semi-axis in X
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G4double fDy; // semi-axis in Y
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G4double fDz; // half length in Z
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G4double fCubicVolume = 0.0; // volume
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G4double fSurfaceArea = 0.0; // surface area
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/** Cached pre-calculated values. */
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G4double fRsph; // R of bounding sphere
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G4double fDDx; // Dx squared
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G4double fDDy; // Dy squared
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G4double fSx; // X scale factor
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G4double fSy; // Y scale factor
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G4double fR; // resulting Radius, after scaling elipse to circle
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G4double fQ1; // distance approximation : dist = Q1*(x^2 + y^2) - Q2
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G4double fQ2; // distance approximation : dist = Q1*(x^2 + y^2) - Q2
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G4double fScratch; // half length of scratching segment squared
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mutable G4bool fRebuildPolyhedron = false;
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mutable G4Polyhedron* fpPolyhedron = nullptr;
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};
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#include "G4EllipticalTube.icc"
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#endif // defined(G4GEOM_USE_UELLIPTICALTUBE) && defined(G4GEOM_USE_SYS_USOLIDS)
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#endif // G4ELLIPTICALTUBE_HH
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