Gabriele Cosmo
245 lines
8.8 KiB
C++
245 lines
8.8 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 intellectual property of the *
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// * Vanderbilt University Free Electron Laser Center *
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// * Vanderbilt University, Nashville, TN, USA *
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// * Development supported by: *
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// * United States MFEL program under grant FA9550-04-1-0045 *
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// * and NASA under contract number NNG04CT05P. *
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// * Written by Marcus H. Mendenhall and Robert A. Weller. *
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// * *
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// * Contributed to the Geant4 Core, January, 2005. *
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// * *
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// ********************************************************************
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//
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// G4Tet
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//
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// Class description:
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//
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// A G4Tet is a tetrahedra solid, defined by 4 points in space.
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// Author: M.H.Mendenhall & R.A.Weller (Vanderbilt University, USA), 03.09.2004
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// E.Tcherniaev (CERN), 08.01.2020 - Complete revision, speed up
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// --------------------------------------------------------------------
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#ifndef G4TET_HH
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#define G4TET_HH
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#include "G4GeomTypes.hh"
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#if defined(G4GEOM_USE_USOLIDS)
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#define G4GEOM_USE_UTET 1
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#endif
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#if defined(G4GEOM_USE_UTET)
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#define G4UTet G4Tet
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#include "G4UTet.hh"
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#else
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#include "G4VSolid.hh"
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/**
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* @brief G4Tet is a tetrahedra solid, defined by 4 points in space.
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*/
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class G4Tet : public G4VSolid
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{
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public:
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/**
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* Constructs a tetrahedra, given its parameters.
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* @param[in] pName The solid name.
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* @param[in] anchor The anchor point.
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* @param[in] p2 Point 2.
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* @param[in] p3 Point 3.
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* @param[in] p4 Point 4.
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* @param[in] degeneracyFlag Flag indicating degeneracy of points.
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*/
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G4Tet(const G4String& pName,
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const G4ThreeVector& anchor,
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const G4ThreeVector& p2,
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const G4ThreeVector& p3,
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const G4ThreeVector& p4,
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G4bool* degeneracyFlag = nullptr);
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/**
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* Destructor.
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*/
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~G4Tet() override;
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/**
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* Modifier and accessors, for the four vertices of the shape.
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*/
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void SetVertices(const G4ThreeVector& anchor,
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const G4ThreeVector& p1,
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const G4ThreeVector& p2,
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const G4ThreeVector& p3,
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G4bool* degeneracyFlag = nullptr);
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void GetVertices(G4ThreeVector& anchor,
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G4ThreeVector& p1,
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G4ThreeVector& p2,
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G4ThreeVector& p3) const;
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std::vector<G4ThreeVector> GetVertices() const;
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/**
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* Checks if the tetrahedron is degenerate. A tetrahedron is considered
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* as degenerate in case its minimal height is less than the degeneracy
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* tolerance
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* @returns true if the tetrahedron is degenerate.
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*/
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G4bool CheckDegeneracy(const G4ThreeVector& p0,
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const G4ThreeVector& p1,
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const G4ThreeVector& p2,
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const G4ThreeVector& p3) const;
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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 SetBoundingLimits(const G4ThreeVector& pMin, const G4ThreeVector& pMax);
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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, "G4Tet" 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 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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* 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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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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/**
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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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G4Tet(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4Tet(const G4Tet& rhs);
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G4Tet& operator=(const G4Tet& rhs);
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private:
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/**
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* Initialises the data members.
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*/
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void Initialize(const G4ThreeVector& p0,
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const G4ThreeVector& p1,
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const G4ThreeVector& p2,
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const G4ThreeVector& p3);
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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 halfTolerance = 0;
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G4double fCubicVolume = 0; // Volume
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G4double fSurfaceArea = 0; // Surface area
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mutable G4bool fRebuildPolyhedron = false;
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mutable G4Polyhedron* fpPolyhedron = nullptr;
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G4ThreeVector fVertex[4]; // thetrahedron vertices
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G4ThreeVector fNormal[4]; // normals to faces
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G4double fDist[4] = {0}; // distances from origin to faces
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G4double fArea[4] = {0}; // face areas
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G4ThreeVector fBmin, fBmax; // bounding box
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};
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#endif
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#endif
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