Gabriele Cosmo
292 lines
10 KiB
C++
292 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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// G4Sphere
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//
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// Class description:
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//
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// A G4Sphere is, in the general case, a section of a spherical shell,
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// between specified phi and theta angles
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//
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// The phi and theta segments are described by a starting angle,
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// and the +ve delta angle for the shape.
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// If the delta angle is >=2*pi, or >=pi the shape is treated as
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// continuous in phi or theta respectively.
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//
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// Theta must lie between 0-pi (incl).
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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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//
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// fSPhi starting angle of the segment in radians
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// fDPhi delta angle of the segment in radians
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//
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// fSTheta starting angle of the segment in radians
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// fDTheta delta angle of the segment in radians
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//
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//
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// Note:
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// Internally fSPhi & fDPhi are adjusted so that fDPhi<=2PI,
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// and fDPhi+fSPhi<=2PI. This enables simpler comparisons to be
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// made with (say) Phi of a point.
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// Author: Paul Kent (CERN), 28.03.1994 - Code converted to tolerant geometry
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// --------------------------------------------------------------------
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#ifndef G4SPHERE_HH
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#define G4SPHERE_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_USPHERE 1
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#endif
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#if defined(G4GEOM_USE_USPHERE)
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#define G4USphere G4Sphere
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#include "G4USphere.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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class G4VisExtent;
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/**
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* @brief G4Sphere is, in the general case, a section of a spherical shell,
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* between specified phi and theta angles.
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* The phi and theta segments are described by a starting angle and the +ve
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* delta angle for the shape. If the delta angle is >=2*pi, or >=pi the shape
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* is treated as continuous in phi or theta respectively.
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* Theta must lie between [0..pi].
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*/
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class G4Sphere : public G4CSGSolid
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{
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public:
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/**
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* Constructs a sphere or sphere shell section with the given
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* name and dimensions.
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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] pSPhi Starting Phi angle of the segment in radians.
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* @param[in] pDPhi Delta Phi angle of the segment in radians.
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* @param[in] pSTheta Starting Theta angle of the segment in radians.
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* @param[in] pDTheta Delta Theta angle of the segment in radians.
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*/
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G4Sphere(const G4String& pName,
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G4double pRmin, G4double pRmax,
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G4double pSPhi, G4double pDPhi,
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G4double pSTheta, G4double pDTheta);
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/**
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* Default destructor.
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*/
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~G4Sphere() 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 GetStartPhiAngle () const;
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inline G4double GetDeltaPhiAngle () const;
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inline G4double GetStartThetaAngle() const;
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inline G4double GetDeltaThetaAngle() 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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inline G4double GetSinStartTheta () const;
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inline G4double GetCosStartTheta () const;
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inline G4double GetSinEndTheta () const;
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inline G4double GetCosEndTheta () 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 SetStartPhiAngle (G4double newSphi, G4bool trig = true);
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inline void SetDeltaPhiAngle (G4double newDphi);
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inline void SetStartThetaAngle(G4double newSTheta);
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inline void SetDeltaThetaAngle(G4double newDTheta);
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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,
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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, "G4Sphere" 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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G4VisExtent GetExtent() const override;
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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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G4Sphere(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4Sphere(const G4Sphere& rhs) = default;
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G4Sphere& operator=(const G4Sphere& rhs);
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private:
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/**
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* Resets relevant values to zero.
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*/
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inline void Initialize();
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/**
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* Reset relevant flags and angle values.
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*/
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inline void CheckThetaAngles(G4double sTheta, G4double dTheta);
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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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* Recompute relevant trigonometric values and cache them.
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*/
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inline void InitializePhiTrigonometry();
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inline void InitializeThetaTrigonometry();
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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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private:
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/** Radial and angular tolerances. */
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G4double fRminTolerance, fRmaxTolerance, kAngTolerance,
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kRadTolerance, fEpsilon = 2.e-11;
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/** Radial and angular dimensions. */
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G4double fRmin, fRmax, fSPhi, fDPhi, fSTheta, fDTheta;
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/** Cached trigonometric values for Phi angle. */
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G4double sinCPhi, cosCPhi, cosHDPhi, cosHDPhiOT, cosHDPhiIT,
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sinSPhi, cosSPhi, sinEPhi, cosEPhi, hDPhi, cPhi, ePhi;
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/** Cached trigonometric values for Theta angle. */
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G4double sinSTheta, cosSTheta, sinETheta, cosETheta,
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tanSTheta, tanSTheta2, tanETheta, tanETheta2, eTheta;
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/** Flags for identification of section, shell or full sphere. */
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G4bool fFullPhiSphere=false, fFullThetaSphere=false, fFullSphere=true;
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/** Cached half tolerance values. */
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G4double halfCarTolerance, halfAngTolerance;
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};
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#include "G4Sphere.icc"
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#endif
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#endif
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