Gabriele Cosmo
289 lines
10 KiB
C++
289 lines
10 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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// G4Tubs
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//
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// Class description:
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//
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// A tube or tube segment with curved sides parallel to
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// the z-axis. The tube has a specified half-length along
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// the z-axis, about which it is centered, and a given
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// minimum and maximum radius. A minimum radius of 0
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// corresponds to filled tube /cylinder. The tube segment is
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// specified by starting and delta angles for phi, with 0
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// being the +x axis, PI/2 the +y axis.
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// A delta angle of 2PI signifies a complete, unsegmented
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// tube/cylinder.
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//
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// Member Data:
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//
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// fRMin Inner radius
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// fRMax Outer radius
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// fDz half length in z
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//
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// fSPhi The starting phi angle in radians,
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// adjusted such that fSPhi+fDPhi<=2PI, fSPhi>-2PI
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//
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// fDPhi Delta angle of the segment.
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//
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// fPhiFullTube Boolean variable used for indicate the Phi Section
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// Author: Paul Kent (CERN), 23.01.1994 - First version
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// --------------------------------------------------------------------
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#ifndef G4TUBS_HH
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#define G4TUBS_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_UTUBS 1
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#endif
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#if defined(G4GEOM_USE_UTUBS)
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#define G4UTubs G4Tubs
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#include "G4UTubs.hh"
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#else
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#include <CLHEP/Units/PhysicalConstants.h>
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#include "G4CSGSolid.hh"
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#include "G4Polyhedron.hh"
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/**
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* @brief G4Tubs is a tube or tube segment with curved sides parallel to
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* the Z-axis. The tube has a specified half-length along the Z-axis, about
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* which it is centered, and a given minimum and maximum radius. A minimum
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* radius of 0 corresponds to filled tube/cylinder. The tube segment is
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* specified by starting and delta angles for phi, with 0 being the +x axis,
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* PI/2 the +y axis. A delta angle of 2PI signifies a complete, unsegmented
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* tube/cylinder.
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*/
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class G4Tubs : public G4CSGSolid
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{
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public:
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/**
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* Constructs a tubs with the given name and dimensions.
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* It checks the input parameters, converting angles so 0<sphi+dpshi<=2_PI
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* if pdphi>2PI then reset it to 2PI.
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* @param[in] pName The name of the solid.
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* @param[in] pRMin Inner radius.
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* @param[in] pRMax Outer radius.
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* @param[in] pDz Half length in Z.
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* @param[in] pSPhi Starting phi angle in radians.
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* @param[in] pDPhi Angle of the segment in radians.
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*/
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G4Tubs( const G4String& pName,
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G4double pRMin,
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G4double pRMax,
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G4double pDz,
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G4double pSPhi,
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G4double pDPhi );
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/**
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* Default destructor.
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*/
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~G4Tubs() override = default;
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/**
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* Accessors.
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*/
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inline G4double GetInnerRadius () const;
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inline G4double GetOuterRadius () const;
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inline G4double GetZHalfLength () const;
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inline G4double GetStartPhiAngle () const;
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inline G4double GetDeltaPhiAngle () const;
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inline G4double GetSinStartPhi () const;
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inline G4double GetCosStartPhi () const;
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inline G4double GetSinEndPhi () const;
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inline G4double GetCosEndPhi () const;
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/**
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* Modifiers.
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*/
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inline void SetInnerRadius (G4double newRMin);
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inline void SetOuterRadius (G4double newRMax);
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inline void SetZHalfLength (G4double newDz);
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inline void SetStartPhiAngle (G4double newSPhi, G4bool trig=true);
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inline void SetDeltaPhiAngle (G4double newDPhi);
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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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* Dispatch method for parameterisation replication mechanism and
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* dimension computation.
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*/
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void ComputeDimensions( G4VPVParameterisation* p,
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const G4int n,
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const G4VPhysicalVolume* pRep ) override;
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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, 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, "G4Tubs" of the solid.
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*/
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G4GeometryType GetEntityType() const 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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* 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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* Methods for creating graphical representations (i.e. for visualisation).
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*/
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void DescribeYourselfTo (G4VGraphicsScene& scene) const override;
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G4Polyhedron* CreatePolyhedron () 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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G4Tubs(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4Tubs(const G4Tubs& rhs) = default;
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G4Tubs& operator=(const G4Tubs& rhs);
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protected:
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/**
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* Resets the relevant values to zero.
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*/
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inline void Initialize();
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/**
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* Methods resetting relevant flags and angle values.
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*/
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inline void CheckSPhiAngle(G4double sPhi);
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inline void CheckDPhiAngle(G4double dPhi);
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inline void CheckPhiAngles(G4double sPhi, G4double dPhi);
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/**
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* Recomputes relevant trigonometric values and caches them.
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*/
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inline void InitializeTrigonometry();
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/**
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* Computes fast inverse cylindrical (Rxy) radius for points expected to
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* be on a cylindrical surface. Ensures that surface normal vector
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* produced has magnitude with 'normalTolerance' of unit.
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*/
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inline G4double FastInverseRxy( const G4ThreeVector& pos, G4double invRad,
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G4double normalTolerance ) const;
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/**
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* Algorithm for SurfaceNormal() following the original specification
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* for points not on the surface.
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*/
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G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p ) const;
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protected:
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/** Radial and angular tolerances. */
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G4double kRadTolerance, kAngTolerance;
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/** Tolerance of unity for surface normal. */
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static constexpr G4double kNormTolerance = 1.0e-6;
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/** Radial and angular dimensions. */
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G4double fRMin, fRMax, fDz, fSPhi, fDPhi;
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/** Cached trigonometric values. */
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G4double sinCPhi, cosCPhi, cosHDPhi, cosHDPhiOT, cosHDPhiIT,
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sinSPhi, cosSPhi, sinEPhi, cosEPhi;
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/** Flag for identification of section or full tube. */
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G4bool fPhiFullTube;
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/** More cached values - inverse of Rmax, Rmin. */
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G4double fInvRmax, fInvRmin;
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/** Cached half tolerance values. */
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G4double halfCarTolerance, halfRadTolerance, halfAngTolerance;
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};
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#include "G4Tubs.icc"
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#endif
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#endif
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