Gabriele Cosmo
208 lines
7.5 KiB
C++
208 lines
7.5 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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// G4TwistTrapFlatSide
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//
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// Class description:
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//
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// Class describing a flat boundary surface for a trapezoid.
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// Author: Oliver Link (CERN), 27.10.2004 - Created
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// --------------------------------------------------------------------
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#ifndef G4TWISTTRAPFLATSIDE_HH
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#define G4TWISTTRAPFLATSIDE_HH
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#include "G4VTwistSurface.hh"
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/**
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* @brief G4TwistTrapFlatSide describes a flat boundary surface for a trapezoid.
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*/
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class G4TwistTrapFlatSide : public G4VTwistSurface
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{
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public:
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/**
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* Constructs a trapezoid flat boundary surface, given its parameters.
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* @param[in] name The surface name.
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* @param[in] PhiTwist The twist angle.
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* @param[in] pDx1 Half x length at -pDz,-pDy.
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* @param[in] pDx2 Half x length at -pDz,+pDy.
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* @param[in] pDy Half y length.
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* @param[in] pDz Half z length.
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* @param[in] pAlpha Tilt angle at +pDz.
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* @param[in] pPhi Direction between end planes - azimuthal angle.
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* @param[in] pTheta Direction between end planes - polar angle.
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* @param[in] handedness Orientation: +z = +ve, -z = -ve.
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*/
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G4TwistTrapFlatSide( const G4String& name,
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G4double PhiTwist,
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G4double pDx1,
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G4double pDx2,
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G4double pDy,
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G4double pDz,
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G4double pAlpha,
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G4double pPhi,
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G4double pTheta,
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G4int handedness );
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/**
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* Default destructor.
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*/
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~G4TwistTrapFlatSide() override = default;
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/**
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* Returns a normal vector at a surface (or very close to the surface)
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* point at 'p'.
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* @param[in] p Not used. Using current normal.
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* @param[in] isGlobal If true, it returns the normal in global coordinates.
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* @returns The current normal vector.
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*/
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G4ThreeVector GetNormal(const G4ThreeVector& /* p */ ,
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G4bool isGlobal = false) override;
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/**
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* Returns the distance to surface, given point 'gp' and direction 'gv'.
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* @param[in] gp The point from where computing the distance.
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* @param[in] gv The direction along which computing the distance.
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* @param[out] gxx Vector of global points based on number of solutions.
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* @param[out] distance The distance vector based on number of solutions.
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* @param[out] areacode The location vector based on number of solutions.
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* @param[out] isvalid Validity vector based on number of solutions.
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* @param[in] validate Adopted validation criteria.
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* @returns The number of solutions.
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*/
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G4int DistanceToSurface(const G4ThreeVector& gp,
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const G4ThreeVector& gv,
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G4ThreeVector gxx[],
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G4double distance[],
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G4int areacode[],
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G4bool isvalid[],
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EValidate validate = kValidateWithTol) override;
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/**
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* Returns the safety distance to surface, given point 'gp'.
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* @param[in] gp The point from where computing the safety distance.
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* @param[out] gxx Vector of global points based on number of solutions.
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* @param[out] distance The distance vector based on number of solutions.
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* @param[out] areacode The location vector based on number of solutions.
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* @returns The number of solutions.
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*/
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G4int DistanceToSurface(const G4ThreeVector& gp,
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G4ThreeVector gxx[],
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G4double distance[],
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G4int areacode[]) 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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G4TwistTrapFlatSide(__void__&);
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private:
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/**
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* Returns point on surface given 'phi' and 'u'.
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*/
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inline G4ThreeVector SurfacePoint(G4double x, G4double y,
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G4bool isGlobal = false) override;
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/**
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* Internal accessors.
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*/
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inline G4double GetBoundaryMin(G4double u) override;
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inline G4double GetBoundaryMax(G4double u) override;
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inline G4double GetSurfaceArea() override;
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void GetFacets( G4int m, G4int n, G4double xyz[][3],
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G4int faces[][4], G4int iside ) override;
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inline G4double xAxisMax(G4double u, G4double fTanAlpha) const;
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/**
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* Setters.
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*/
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void SetCorners() override;
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void SetBoundaries() override;
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/**
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* Returns the area code for point 'xx' using or not surface tolerance.
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*/
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G4int GetAreaCode(const G4ThreeVector& xx,
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G4bool withTol = true) override;
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private:
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G4double fDx1;
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G4double fDx2;
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G4double fDy;
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G4double fDz;
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G4double fPhiTwist;
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G4double fAlpha;
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G4double fTAlph;
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G4double fPhi;
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G4double fTheta;
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G4double fdeltaX;
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G4double fdeltaY;
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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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G4double G4TwistTrapFlatSide::xAxisMax(G4double u, G4double fTanAlpha) const
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{
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return ( ( fDx2 + fDx1 )/2. + u*(fDx2 - fDx1)/(2.*fDy) + u *fTanAlpha ) ;
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}
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inline G4ThreeVector
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G4TwistTrapFlatSide::SurfacePoint(G4double x, G4double y, G4bool isGlobal)
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{
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G4ThreeVector SurfPoint ( x,y,0);
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if (isGlobal) { return (fRot*SurfPoint + fTrans); }
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return SurfPoint;
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}
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inline
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G4double G4TwistTrapFlatSide::GetBoundaryMin(G4double y)
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{
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return -xAxisMax(y, -fTAlph) ;
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}
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inline
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G4double G4TwistTrapFlatSide::GetBoundaryMax(G4double y)
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{
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return xAxisMax(y, fTAlph) ;
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}
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inline
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G4double G4TwistTrapFlatSide::GetSurfaceArea()
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{
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return 2*(fDx1 + fDx2)*fDy ;
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}
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#endif
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