Gabriele Cosmo
277 lines
9.7 KiB
C++
277 lines
9.7 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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// G4Para
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//
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// Class description:
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//
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// A parallelepiped, essentially a box with half lengths dx,dy,dz
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// 'skewed' so that there are angles theta & phi of the polar line
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// joining the faces at +-dz in z, and alpha formed by the y axis
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// and the plane joining the centre of the faces parallel to the
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// z-x plane at -dy and +dy.
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//
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// A G4Para is defined by:
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// dx,dy,dz - Half-length in x,y,z
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// alpha - Angle formed by the y axis and by the plane joining
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// the centre of the faces parallel to the z-x plane
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// at -dy and +dy
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// theta - Polar angle of the line joining the centres of the
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// faces at -dz and +dz in z
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// phi - Azimuthal angle of the line joining the centres of the
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// faces at -dz and +dz in z
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// Member data:
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//
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// Note that the angles parameters are not stored - precomputed trig is
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// stored instead.
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//
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// fDx Half-length in x
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// fDy Half-length in y
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// fDz Half-length in z
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//
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// fTalpha Tan of alpha
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// fTthetaCphi Tan theta * Cos phi
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// fTthetaSphi Tan theta * Sin phi
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// Author: Paul Kent (CERN), 21.03.1994 - Code converted to tolerant geometry
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// --------------------------------------------------------------------
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#ifndef G4PARA_HH
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#define G4PARA_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_UPARA 1
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#endif
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#if defined(G4GEOM_USE_UPARA)
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#define G4UPara G4Para
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#include "G4UPara.hh"
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#else
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#include "G4CSGSolid.hh"
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#include "G4Polyhedron.hh"
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/**
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* @brief G4Para represents a parallelepiped, essentially a box with half
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* lengths dx,dy,dz 'skewed' so that there are angles theta & phi of the
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* polar line joining the faces at +-dz in z, and alpha formed by the y axis
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* and the plane joining the centre of the faces parallel to the z-x plane
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* at -dy and +dy.
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*/
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class G4Para : public G4CSGSolid
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{
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public:
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/**
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* Constructs a parallelepiped, given a name and its parameters.
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* @param[in] pName The name of the solid.
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* @param[in] pDx Half-length in x.
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* @param[in] pDy Half-length in y.
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* @param[in] pDz Half-length in z.
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* @param[in] pAlpha Angle formed by the Y axis and by the plane joining
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* the centre of the faces parallel to the Z-X plane at -dy
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* and +dy.
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* @param[in] pTheta Polar angle of the line joining the centres of the
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* faces at -dz and +dz in Z.
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* @param[in] pPhi Azimuthal angle of the line joining the centres of
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* the faces at -dz and +dz in Z.
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*/
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G4Para(const G4String& pName,
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G4double pDx, G4double pDy, G4double pDz,
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G4double pAlpha, G4double pTheta, G4double pPhi);
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/**
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* Constructs a parallelepiped, given a name and its 8 vertices.
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* @param[in] pName The name of the solid.
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* @param[in] pt Points of the 8 vertices.
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*/
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G4Para(const G4String& pName,
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const G4ThreeVector pt[8]);
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/**
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* Default destructor.
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*/
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~G4Para() override = default;
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/**
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* Accessors. Obtain (re)computed values of the original parameters.
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*/
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inline G4double GetZHalfLength() const;
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inline G4ThreeVector GetSymAxis() const;
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inline G4double GetYHalfLength() const;
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inline G4double GetXHalfLength() const;
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inline G4double GetTanAlpha() const;
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inline G4double GetAlpha() const;
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inline G4double GetTheta() const;
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inline G4double GetPhi() const;
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/**
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* Modifiers.
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*/
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inline void SetXHalfLength(G4double val);
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inline void SetYHalfLength(G4double val);
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inline void SetZHalfLength(G4double val);
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inline void SetAlpha(G4double alpha);
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inline void SetTanAlpha(G4double val);
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inline void SetThetaAndPhi(G4double pTheta, G4double pPhi);
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/**
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* Sets all parameters, as for constructor.
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*/
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void SetAllParameters(G4double pDx, G4double pDy, G4double pDz,
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G4double pAlpha, G4double pTheta, G4double pPhi);
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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, "G4Para" 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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* Returns true as the solid has only planar faces.
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*/
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G4bool IsFaceted() 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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G4Para(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4Para(const G4Para& rhs);
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G4Para& operator=(const G4Para& rhs);
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private:
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/**
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* Checks the dimension parameters given in input.
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*/
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void CheckParameters();
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/**
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* Sets the side planes.
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*/
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void MakePlanes();
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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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G4double halfCarTolerance;
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G4double fDx,fDy,fDz;
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G4double fTalpha,fTthetaCphi,fTthetaSphi;
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struct { G4double a,b,c,d; } fPlanes[4];
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};
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#include "G4Para.icc"
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#endif
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#endif
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