// // ******************************************************************** // * License and Disclaimer * // * * // * The Geant4 software is copyright of the Copyright Holders of * // * the Geant4 Collaboration. It is provided under the terms and * // * conditions of the Geant4 Software License, included in the file * // * LICENSE and available at http://cern.ch/geant4/license . These * // * include a list of copyright holders. * // * * // * Neither the authors of this software system, nor their employing * // * institutes,nor the agencies providing financial support for this * // * work make any representation or warranty, express or implied, * // * regarding this software system or assume any liability for its * // * use. Please see the license in the file LICENSE and URL above * // * for the full disclaimer and the limitation of liability. * // * * // * This code implementation is the result of the scientific and * // * technical work of the GEANT4 collaboration. * // * By using, copying, modifying or distributing the software (or * // * any work based on the software) you agree to acknowledge its * // * use in resulting scientific publications, and indicate your * // * acceptance of all terms of the Geant4 Software license. * // ******************************************************************** // // G4Tubs // // Class description: // // A tube or tube segment with curved sides parallel to // the z-axis. The tube has a specified half-length along // the z-axis, about which it is centered, and a given // minimum and maximum radius. A minimum radius of 0 // corresponds to filled tube /cylinder. The tube segment is // specified by starting and delta angles for phi, with 0 // being the +x axis, PI/2 the +y axis. // A delta angle of 2PI signifies a complete, unsegmented // tube/cylinder. // // Member Data: // // fRMin Inner radius // fRMax Outer radius // fDz half length in z // // fSPhi The starting phi angle in radians, // adjusted such that fSPhi+fDPhi<=2PI, fSPhi>-2PI // // fDPhi Delta angle of the segment. // // fPhiFullTube Boolean variable used for indicate the Phi Section // Author: Paul Kent (CERN), 23.01.1994 - First version // -------------------------------------------------------------------- #ifndef G4TUBS_HH #define G4TUBS_HH #include "G4GeomTypes.hh" #if defined(G4GEOM_USE_USOLIDS) #define G4GEOM_USE_UTUBS 1 #endif #if defined(G4GEOM_USE_UTUBS) #define G4UTubs G4Tubs #include "G4UTubs.hh" #else #include #include "G4CSGSolid.hh" #include "G4Polyhedron.hh" /** * @brief G4Tubs is a tube or tube segment with curved sides parallel to * the Z-axis. The tube has a specified half-length along the Z-axis, about * which it is centered, and a given minimum and maximum radius. A minimum * radius of 0 corresponds to filled tube/cylinder. The tube segment is * specified by starting and delta angles for phi, with 0 being the +x axis, * PI/2 the +y axis. A delta angle of 2PI signifies a complete, unsegmented * tube/cylinder. */ class G4Tubs : public G4CSGSolid { public: /** * Constructs a tubs with the given name and dimensions. * It checks the input parameters, converting angles so 02PI then reset it to 2PI. * @param[in] pName The name of the solid. * @param[in] pRMin Inner radius. * @param[in] pRMax Outer radius. * @param[in] pDz Half length in Z. * @param[in] pSPhi Starting phi angle in radians. * @param[in] pDPhi Angle of the segment in radians. */ G4Tubs( const G4String& pName, G4double pRMin, G4double pRMax, G4double pDz, G4double pSPhi, G4double pDPhi ); /** * Default destructor. */ ~G4Tubs() override = default; /** * Accessors. */ inline G4double GetInnerRadius () const; inline G4double GetOuterRadius () const; inline G4double GetZHalfLength () const; inline G4double GetStartPhiAngle () const; inline G4double GetDeltaPhiAngle () const; inline G4double GetSinStartPhi () const; inline G4double GetCosStartPhi () const; inline G4double GetSinEndPhi () const; inline G4double GetCosEndPhi () const; /** * Modifiers. */ inline void SetInnerRadius (G4double newRMin); inline void SetOuterRadius (G4double newRMax); inline void SetZHalfLength (G4double newDz); inline void SetStartPhiAngle (G4double newSPhi, G4bool trig=true); inline void SetDeltaPhiAngle (G4double newDPhi); /** * Returning an estimation of the solid volume (capacity) and * surface area, in internal units. */ G4double GetCubicVolume() override; G4double GetSurfaceArea() override; /** * Dispatch method for parameterisation replication mechanism and * dimension computation. */ void ComputeDimensions( G4VPVParameterisation* p, const G4int n, const G4VPhysicalVolume* pRep ) override; /** * Computes the bounding limits of the solid. * @param[out] pMin The minimum bounding limit point. * @param[out] pMax The maximum bounding limit point. */ void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const override; /** * Calculates the minimum and maximum extent of the solid, when under the * specified transform, and within the specified limits. * @param[in] pAxis The axis along which compute the extent. * @param[in] pVoxelLimit The limiting space dictated by voxels. * @param[in] pTransform The internal transformation applied to the solid. * @param[out] pMin The minimum extent value. * @param[out] pMax The maximum extent value. * @returns True if the solid is intersected by the extent region. */ G4bool CalculateExtent(const EAxis pAxis, const G4VoxelLimits& pVoxelLimit, const G4AffineTransform& pTransform, G4double& pmin, G4double& pmax) const override; /** * Concrete implementations of the expected query interfaces for * solids, as defined in the base class G4VSolid. */ EInside Inside( const G4ThreeVector& p ) const override; G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const override; G4double DistanceToIn(const G4ThreeVector& p, const G4ThreeVector& v) const override; G4double DistanceToIn(const G4ThreeVector& p) const override; G4double DistanceToOut(const G4ThreeVector& p, const G4ThreeVector& v, const G4bool calcNorm = false, G4bool* validNorm = nullptr, G4ThreeVector* n = nullptr) const override; G4double DistanceToOut(const G4ThreeVector& p) const override; /** * Returns the type ID, "G4Tubs" of the solid. */ G4GeometryType GetEntityType() const override; /** * Returns a random point located and uniformly distributed on the * surface of the solid. */ G4ThreeVector GetPointOnSurface() const override; /** * Makes a clone of the object for use in multi-treading. * @returns A pointer to the new cloned allocated solid. */ G4VSolid* Clone() const override; /** * Streams the object contents to an output stream. */ std::ostream& StreamInfo( std::ostream& os ) const override; /** * Methods for creating graphical representations (i.e. for visualisation). */ void DescribeYourselfTo (G4VGraphicsScene& scene) const override; G4Polyhedron* CreatePolyhedron () const override; /** * Fake default constructor for usage restricted to direct object * persistency for clients requiring preallocation of memory for * persistifiable objects. */ G4Tubs(__void__&); /** * Copy constructor and assignment operator. */ G4Tubs(const G4Tubs& rhs) = default; G4Tubs& operator=(const G4Tubs& rhs); protected: /** * Resets the relevant values to zero. */ inline void Initialize(); /** * Methods resetting relevant flags and angle values. */ inline void CheckSPhiAngle(G4double sPhi); inline void CheckDPhiAngle(G4double dPhi); inline void CheckPhiAngles(G4double sPhi, G4double dPhi); /** * Recomputes relevant trigonometric values and caches them. */ inline void InitializeTrigonometry(); /** * Computes fast inverse cylindrical (Rxy) radius for points expected to * be on a cylindrical surface. Ensures that surface normal vector * produced has magnitude with 'normalTolerance' of unit. */ inline G4double FastInverseRxy( const G4ThreeVector& pos, G4double invRad, G4double normalTolerance ) const; /** * Algorithm for SurfaceNormal() following the original specification * for points not on the surface. */ G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p ) const; protected: /** Radial and angular tolerances. */ G4double kRadTolerance, kAngTolerance; /** Tolerance of unity for surface normal. */ static constexpr G4double kNormTolerance = 1.0e-6; /** Radial and angular dimensions. */ G4double fRMin, fRMax, fDz, fSPhi, fDPhi; /** Cached trigonometric values. */ G4double sinCPhi, cosCPhi, cosHDPhi, cosHDPhiOT, cosHDPhiIT, sinSPhi, cosSPhi, sinEPhi, cosEPhi; /** Flag for identification of section or full tube. */ G4bool fPhiFullTube; /** More cached values - inverse of Rmax, Rmin. */ G4double fInvRmax, fInvRmin; /** Cached half tolerance values. */ G4double halfCarTolerance, halfRadTolerance, halfAngTolerance; }; #include "G4Tubs.icc" #endif #endif