Gabriele Cosmo
303 lines
11 KiB
C++
303 lines
11 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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// G4GenericTrap
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//
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// Class description:
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//
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// G4GenericTrap is a solid which represents an arbitrary trapezoid with
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// up to 8 vertices standing on two parallel planes perpendicular to Z axis.
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//
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// Parameters in the constructor:
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// - name - solid name
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// - halfZ - the solid half length in Z
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// - vertices - the (x,y) coordinates of vertices:
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// o first four points: vertices[i], i<4
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// are the vertices sitting on the -halfZ plane;
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// o last four points: vertices[i], i>=4
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// are the vertices sitting on the +halfZ plane.
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//
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// The order of defining the vertices of the solid is the following:
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// - point 0 is connected with points 1,3,4
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// - point 1 is connected with points 0,2,5
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// - point 2 is connected with points 1,3,6
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// - point 3 is connected with points 0,2,7
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// - point 4 is connected with points 0,5,7
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// - point 5 is connected with points 1,4,6
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// - point 6 is connected with points 2,5,7
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// - point 7 is connected with points 3,4,6
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// Points can be identical in order to create shapes with less than 8 vertices.
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// Adapted from Arb8 implementation in Root/TGeo.
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// Authors: T.Nikitina (CERN) & I.Hrivnacova (IPN, Orsay), 27.05.2010 - Created
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// Evgueni Tcherniaev (CERN), 27.05.2024 - Complete revision, speed up
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// -------------------------------------------------------------------
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#ifndef G4GENERICTRAP_HH
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#define G4GENERICTRAP_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_UGENERICTRAP 1
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#endif
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#if defined(G4GEOM_USE_UGENERICTRAP)
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#define G4UGenericTrap G4GenericTrap
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#include "G4UGenericTrap.hh"
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#else
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#include <vector>
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#include "globals.hh"
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#include "G4TwoVector.hh"
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#include "G4VSolid.hh"
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/**
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* @brief G4GenericTrap is a solid which represents an arbitrary trapezoid with
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* up to 8 vertices standing on two parallel planes perpendicular to the Z axis.
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* Points can be identical in order to create shapes with less than 8 vertices.
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*/
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class G4GenericTrap : public G4VSolid
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{
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public:
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/**
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* Constructs an generic trapezoid, given its vertices.
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* @param[in] name The solid name.
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* @param[in] halfZ Half length in Z.
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* @param[in] vertices The (x,y) coordinates of the vertices.
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*/
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G4GenericTrap(const G4String& name, G4double halfZ,
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const std::vector<G4TwoVector>& vertices);
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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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G4GenericTrap(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4GenericTrap(const G4GenericTrap& rhs);
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G4GenericTrap& operator=(const G4GenericTrap& rhs);
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/**
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* Default Destructor.
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*/
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~G4GenericTrap() override = default;
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/**
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* Accessors and modifiers.
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*/
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inline G4double GetZHalfLength() const;
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inline G4int GetNofVertices() const;
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inline G4TwoVector GetVertex(G4int index) const;
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inline const std::vector<G4TwoVector>& GetVertices() const;
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inline G4double GetTwistAngle(G4int index) const;
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inline G4bool IsTwisted() const;
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inline G4int GetVisSubdivisions() const;
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inline void SetVisSubdivisions(G4int subdiv);
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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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* 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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* Returns the type ID, "G4GenericTrap" of the solid.
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*/
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G4GeometryType GetEntityType() const override;
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/**
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* Returns true if the solid has only planar faces; false if twisted.
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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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* 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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* 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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* 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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G4VisExtent GetExtent() const override;
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G4Polyhedron* CreatePolyhedron() const override;
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G4Polyhedron* GetPolyhedron() const override;
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private:
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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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* Checks the parameters of the solid and issues exception if leading
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* to an invalid construct.
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*/
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void CheckParameters(G4double halfZ, const std::vector<G4TwoVector>& vertices);
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/**
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* Computes surface equations and twist angles of lateral faces.
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*/
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void ComputeLateralSurfaces();
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/**
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* Sets the bounding box.
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*/
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void ComputeBoundingBox();
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/**
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* Sets the max length of a scratch.
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*/
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void ComputeScratchLength();
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/**
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* Computes the lateral face area, given the face index.
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* Used for random sampling of points on surface.
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*/
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G4double GetLateralFaceArea(G4int iface) const;
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/**
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* Logger methods for issuing warnings.
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*/
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void WarningSignA(const G4String& method, const G4String& icase, G4double A,
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const G4ThreeVector& p, const G4ThreeVector& v) const;
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void WarningSignB(const G4String& method, const G4String& icase, G4double f, G4double B,
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const G4ThreeVector& p, const G4ThreeVector& v) const;
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void WarningDistanceToIn(G4int k, const G4ThreeVector& p, const G4ThreeVector& v,
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G4double tmin, G4double tmax,
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const G4double ttin[2], const G4double ttout[2]) const;
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void WarningDistanceToOut(const G4ThreeVector& p,
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const G4ThreeVector& v,
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G4double tout) const;
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private:
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struct G4GenericTrapPlane // Ax + By + Cz + D = 0
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{
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G4double A = 0.;
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G4double B = 0.;
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G4double C = 0.;
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G4double D = 0.;
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};
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struct G4GenericTrapSurface // Axz + Byz + Czz + Dx + Ey + Fz + G = 0
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{
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G4double A = 0.;
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G4double B = 0.;
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G4double C = 0.;
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G4double D = 0.;
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G4double E = 0.;
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G4double F = 0.;
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G4double G = 0.;
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};
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// Data members
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G4double halfTolerance = 0.;
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G4double fScratch = 0.;
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G4double fDz = 0.;
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std::vector<G4TwoVector> fVertices = {0.,0.,0.,0.,0.,0.,0.,0.};
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G4TwoVector fDelta[4];
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G4bool fIsTwisted = false;
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G4double fTwist[5] = {0.};
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G4ThreeVector fMinBBox{0.};
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G4ThreeVector fMaxBBox{0.};
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G4int fVisSubdivisions = 0;
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G4GenericTrapPlane fPlane[8];
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G4GenericTrapSurface fSurf[4];
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G4double f4k[4] = {0.}; // Lipschitz constants * 4
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mutable G4double fArea[4] = {0.};
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mutable G4bool fRebuildPolyhedron = false;
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mutable G4Polyhedron* fpPolyhedron = nullptr;
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// Surface and Volume
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G4double fSurfaceArea = 0.;
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G4double fCubicVolume = 0.;
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};
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#include "G4GenericTrap.icc"
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#endif // defined(G4GEOM_USE_UGENERICTRAP)
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#endif // G4GENERICTRAP_HH
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