Gabriele Cosmo
401 lines
18 KiB
C++
401 lines
18 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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// G4TwistedTubs
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//
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// Class description:
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//
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// G4TwistedTubs is a sector of a twisted hollow cylinder.
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// A twisted cylinder which is placed along with z-axis and is
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// separated into phi-segments should become a hyperboloid, and
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// its each segmented piece should be tilted with a stereo angle.
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// G4TwistedTubs is a G4VSolid.
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//
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// Details of the implementation: "Development of a Geant4 solid
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// for stereo mini-jet cells in a cylindrical drift chamber",
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// Computer Physics Communications 153 (2003) pp.373-391
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// Author: Kotoyo Hoshina (Chiba University), 01.08.2002 - created.
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// Oliver Link (CERN), 13.11.2003 - Integration in Geant4
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// from original version in Jupiter-2.5.02 application.
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// --------------------------------------------------------------------
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#ifndef G4TWISTEDTUBS_HH
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#define G4TWISTEDTUBS_HH
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#include "G4VSolid.hh"
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#include "G4TwistTubsFlatSide.hh"
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#include "G4TwistTubsSide.hh"
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#include "G4TwistTubsHypeSide.hh"
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class G4SolidExtentList;
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class G4ClippablePolygon;
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/**
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* @brief G4TwistedTubs is a sector of a twisted hollow cylinder.
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* A twisted cylinder which is placed along with Z axis and is separated into
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* phi-segments should become a hyperboloid, and its each segmented piece
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* should be tilted with a stereo angle.
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*/
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class G4TwistedTubs : public G4VSolid
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{
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public:
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/**
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* Constructs a twisted tube, given radii and twist angle.
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* @param[in] pName The solid name.
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* @param[in] twistedangle The twisted angle.
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* @param[in] endinnerrad Inner radius at endcap.
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* @param[in] endouterrad Outer radius at endcap.
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* @param[in] halfzlen Half Z length.
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* @param[in] dphi Phi angle of a segment.
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*/
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G4TwistedTubs(const G4String& pname, // Name of instance
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G4double twistedangle, // Twisted angle
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G4double endinnerrad, // Inner radius at endcap
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G4double endouterrad, // Outer radius at endcap
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G4double halfzlen, // half z length
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G4double dphi); // Phi angle of a segment
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/**
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* Constructs a twisted tube, given radii, twist angle and number of segments.
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* @param[in] pName The solid name.
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* @param[in] twistedangle The twisted angle.
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* @param[in] endinnerrad Inner radius at endcap.
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* @param[in] endouterrad Outer radius at endcap.
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* @param[in] halfzlen Half Z length.
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* @param[in] nseg Number of segments in Phi.
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* @param[in] totphi Total angle of all segments.
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*/
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G4TwistedTubs(const G4String& pname, // Name of instance
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G4double twistedangle, // Stereo angle
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G4double endinnerrad, // Inner radius at endcap
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G4double endouterrad, // Outer radius at endcap
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G4double halfzlen, // half z length
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G4int nseg, // Number of segments in totalPhi
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G4double totphi); // Total angle of all segments
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/**
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* Constructs a twisted tube, given radii, twist angle and EndZ values.
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* @param[in] pName The solid name.
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* @param[in] twistedangle The twisted angle.
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* @param[in] innerrad Inner radius at z=0.
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* @param[in] outerrad Outer radius at z=0.
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* @param[in] negativeEndz -ve Z endplate.
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* @param[in] positiveEndz +ve Z endplate.
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* @param[in] dphi Phi angle of a segment.
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*/
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G4TwistedTubs(const G4String& pname, // Name of instance
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G4double twistedangle, // Twisted angle
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G4double innerrad, // Inner radius at z=0
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G4double outerrad, // Outer radius at z=0
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G4double negativeEndz, // -ve z endplate
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G4double positiveEndz, // +ve z endplate
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G4double dphi); // Phi angle of a segment
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/**
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* Constructs a twisted tube, given radii, twist angle, EndZ values
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* and number of segments.
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* @param[in] pName The solid name.
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* @param[in] twistedangle The twisted angle.
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* @param[in] innerrad Inner radius at z=0.
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* @param[in] outerrad Outer radius at z=0.
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* @param[in] negativeEndz -ve Z endplate.
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* @param[in] positiveEndz +ve Z endplate.
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* @param[in] nseg Number of segments in Phi.
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* @param[in] totphi Total angle of all segments.
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*/
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G4TwistedTubs(const G4String& pname, // Name of instance
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G4double twistedangle, // Stereo angle
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G4double innerrad, // Inner radius at z=0
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G4double outerrad, // Outer radius at z=0
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G4double negativeEndz, // -ve z endplate
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G4double positiveEndz, // +ve z endplate
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G4int nseg, // Number of segments in totalPhi
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G4double totphi); // Total angle of all segments
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/**
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* Destructor.
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*/
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~G4TwistedTubs() override;
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/**
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* Thows a fatal exception. Parameterisations are not allowed on this shape.
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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,
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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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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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EInside Inside (const G4ThreeVector& p) const override;
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G4ThreeVector SurfaceNormal(const G4ThreeVector& p) 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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G4Polyhedron* GetPolyhedron () const override;
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G4VisExtent GetExtent () 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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* Accessors.
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*/
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inline G4double GetDPhi () const { return fDPhi ; }
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inline G4double GetPhiTwist () const { return fPhiTwist ; }
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inline G4double GetInnerRadius () const { return fInnerRadius; }
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inline G4double GetOuterRadius () const { return fOuterRadius; }
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inline G4double GetInnerStereo () const { return fInnerStereo; }
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inline G4double GetOuterStereo () const { return fOuterStereo; }
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inline G4double GetZHalfLength () const { return fZHalfLength; }
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inline G4double GetKappa () const { return fKappa ; }
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//
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inline G4double GetTanInnerStereo () const { return fTanInnerStereo ; }
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inline G4double GetTanInnerStereo2() const { return fTanInnerStereo2 ; }
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inline G4double GetTanOuterStereo () const { return fTanOuterStereo ; }
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inline G4double GetTanOuterStereo2() const { return fTanOuterStereo2 ; }
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//
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inline G4double GetEndZ (G4int i) const { return fEndZ[i] ; }
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inline G4double GetEndPhi (G4int i) const { return fEndPhi[i]; }
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inline G4double GetEndInnerRadius (G4int i) const
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{ return fEndInnerRadius[i]; }
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inline G4double GetEndOuterRadius (G4int i) const
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{ return fEndOuterRadius[i]; }
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inline G4double GetEndInnerRadius () const
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{ return (fEndInnerRadius[0] > fEndInnerRadius[1] ?
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fEndInnerRadius[0] : fEndInnerRadius[1]); }
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inline G4double GetEndOuterRadius () const
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{ return (fEndOuterRadius[0] > fEndOuterRadius[1] ?
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fEndOuterRadius[0] : fEndOuterRadius[1]); }
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/**
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* Returns the type ID, "G4TwistedTubs" of the solid.
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*/
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G4GeometryType GetEntityType() 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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* Returning an estimation of the solid volume (capacity) and surface area,
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* in internal units. Caches the computed value once computed the first time.
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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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* 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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G4TwistedTubs(__void__&);
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/**
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* Copy constructor and assignment operator.
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*/
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G4TwistedTubs(const G4TwistedTubs& rhs);
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G4TwistedTubs& operator=(const G4TwistedTubs& rhs);
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#ifdef G4TWISTDEBUG
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inline G4VTwistSurface* GetOuterHype() const { return fOuterHype; }
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#endif
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private:
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/**
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* Initialiser of data.
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*/
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inline void SetFields(G4double phitwist, G4double innerrad,
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G4double outerrad,
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G4double negativeEndz, G4double positiveEndz);
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/**
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* Generates the surfaces. Used in constructors.
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*/
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void CreateSurfaces();
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/**
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* Utilities for area computation.
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*/
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G4double GetLateralArea(G4double a, G4double r, G4double z) const;
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G4double GetPhiCutArea(G4double a, G4double r, G4double z) const;
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private:
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G4double fPhiTwist; // Twist angle from -fZHalfLength to fZHalfLength
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G4double fInnerRadius; // Inner-hype radius at z=0
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G4double fOuterRadius; // Outer-hype radius at z=0
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G4double fEndZ[2]; // z at endcaps, [0] = -ve z, [1] = +ve z
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G4double fDPhi; // Phi-width of a segment fDPhi > 0
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G4double fZHalfLength; // Half length along z-axis
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G4double fInnerStereo; // Inner-hype stereo angle
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G4double fOuterStereo; // Outer-hype stereo angle
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G4double fTanInnerStereo; // std::tan(innerStereoAngle)
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G4double fTanOuterStereo; // std::tan(outerStereoAngle)
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G4double fKappa; // std::tan(fPhiTwist/2)/fZHalfLen;
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G4double fEndInnerRadius[2]; // Inner-hype radii endcaps [0] -ve z, [1] +ve z
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G4double fEndOuterRadius[2]; // Outer-hype radii endcaps [0] -ve z, [1] +ve z
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G4double fEndPhi[2]; // Phi endcaps, [0] = -ve z, [1] = +ve z
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G4double fInnerRadius2; // fInnerRadius * fInnerRadius
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G4double fOuterRadius2; // fOuterRadius * fOuterRadius
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G4double fTanInnerStereo2; // fInnerRadius * fInnerRadius
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G4double fTanOuterStereo2; // fInnerRadius * fInnerRadius
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G4double fEndZ2[2]; // fEndZ * fEndZ
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G4VTwistSurface* fLowerEndcap; // Surface of -ve z
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G4VTwistSurface* fUpperEndcap; // Surface of +ve z
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G4VTwistSurface* fLatterTwisted; // Surface of -ve phi
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G4VTwistSurface* fFormerTwisted; // Surface of +ve phi
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G4VTwistSurface* fInnerHype; // Surface of -ve r
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G4VTwistSurface* fOuterHype; // Surface of +ve r
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G4double fCubicVolume = 0.0; // Cached value for cubic volume
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G4double fSurfaceArea = 0.0; // Cached value for surface area
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mutable G4bool fRebuildPolyhedron = false;
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mutable G4Polyhedron* fpPolyhedron = nullptr; // polyhedron for vis
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};
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//=====================================================================
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//---------------------
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// inline functions
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//---------------------
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inline
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void G4TwistedTubs::SetFields(G4double phitwist, G4double innerrad,
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G4double outerrad, G4double negativeEndz,
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G4double positiveEndz)
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{
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fCubicVolume = 0.;
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fPhiTwist = phitwist;
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fEndZ[0] = negativeEndz;
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fEndZ[1] = positiveEndz;
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fEndZ2[0] = fEndZ[0] * fEndZ[0];
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fEndZ2[1] = fEndZ[1] * fEndZ[1];
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fInnerRadius = innerrad;
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fOuterRadius = outerrad;
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fInnerRadius2 = fInnerRadius * fInnerRadius;
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fOuterRadius2 = fOuterRadius * fOuterRadius;
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if (std::fabs(fEndZ[0]) >= std::fabs(fEndZ[1]))
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{
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fZHalfLength = std::fabs(fEndZ[0]);
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}
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else
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{
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fZHalfLength = std::fabs(fEndZ[1]);
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}
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G4double parity = (fPhiTwist > 0 ? 1 : -1);
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G4double tanHalfTwist = std::tan(0.5 * fPhiTwist);
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G4double innerNumerator = std::fabs(fInnerRadius * tanHalfTwist) * parity;
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G4double outerNumerator = std::fabs(fOuterRadius * tanHalfTwist) * parity;
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fTanInnerStereo = innerNumerator / fZHalfLength;
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fTanOuterStereo = outerNumerator / fZHalfLength;
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fTanInnerStereo2 = fTanInnerStereo * fTanInnerStereo;
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fTanOuterStereo2 = fTanOuterStereo * fTanOuterStereo;
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fInnerStereo = std::atan2(innerNumerator, fZHalfLength);
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fOuterStereo = std::atan2(outerNumerator, fZHalfLength);
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fEndInnerRadius[0] = std::sqrt(fInnerRadius2 + fEndZ2[0] * fTanInnerStereo2);
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fEndInnerRadius[1] = std::sqrt(fInnerRadius2 + fEndZ2[1] * fTanInnerStereo2);
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fEndOuterRadius[0] = std::sqrt(fOuterRadius2 + fEndZ2[0] * fTanOuterStereo2);
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fEndOuterRadius[1] = std::sqrt(fOuterRadius2 + fEndZ2[1] * fTanOuterStereo2);
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fKappa = tanHalfTwist / fZHalfLength;
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fEndPhi[0] = std::atan2(fEndZ[0] * tanHalfTwist, fZHalfLength);
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fEndPhi[1] = std::atan2(fEndZ[1] * tanHalfTwist, fZHalfLength);
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#ifdef G4TWISTDEBUG
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G4cout << "/********* G4TwistedTubs::SetFields() Field Parameters ***************** " << G4endl;
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G4cout << "/* fPhiTwist : " << fPhiTwist << G4endl;
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G4cout << "/* fEndZ(0, 1) : " << fEndZ[0] << " , " << fEndZ[1] << G4endl;
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G4cout << "/* fEndPhi(0, 1) : " << fEndPhi[0] << " , " << fEndPhi[1] << G4endl;
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G4cout << "/* fInnerRadius, fOuterRadius : " << fInnerRadius << " , " << fOuterRadius << G4endl;
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G4cout << "/* fEndInnerRadius(0, 1) : " << fEndInnerRadius[0] << " , "
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<< fEndInnerRadius[1] << G4endl;
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G4cout << "/* fEndOuterRadius(0, 1) : " << fEndOuterRadius[0] << " , "
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<< fEndOuterRadius[1] << G4endl;
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G4cout << "/* fInnerStereo, fOuterStereo : " << fInnerStereo << " , " << fOuterStereo << G4endl;
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G4cout << "/* tanHalfTwist, fKappa : " << tanHalfTwist << " , " << fKappa << G4endl;
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G4cout << "/*********************************************************************** " << G4endl;
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#endif
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}
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#endif
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