// // ******************************************************************** // * 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. * // ******************************************************************** // // G4TwistTubsSide // // Class description: // // Class describing a twisted boundary surface for a cylinder. // Author: Kotoyo Hoshina (Chiba University), 01.08.2002 - Created. // Oliver Link (CERN), 13.11.2003 - Integration in Geant4 // from original version in Jupiter-2.5.02 application. // -------------------------------------------------------------------- #ifndef G4TWISTTUBSSIDE_HH #define G4TWISTTUBSSIDE_HH #include "G4VTwistSurface.hh" /** * @brief G4TwistTubsFlatSide describes a twisted boundary surface for * a cylinder. */ class G4TwistTubsSide : public G4VTwistSurface { public: /** * Constructs a cylinder twisted boundary surface, given its parameters. * @param[in] name The surface name. * @param[in] rot Rotation: 0.5*(phi-width segment). * @param[in] tlate Translation. * @param[in] handedness Orientation: R-hand = 1, L-hand = -1. * @param[in] kappa Kappa=tan(TwistAngle/2)/fZHalfLen. * @param[in] axis0 X axis. * @param[in] axis1 Z axis. * @param[in] axis0min Minimum in X. * @param[in] axis1min Minimum in Z. * @param[in] axis0max Maximum in X. * @param[in] axis1max Maximum in Z. */ G4TwistTubsSide(const G4String& name, const G4RotationMatrix& rot, // 0.5*(phi-width segment) const G4ThreeVector& tlate, G4int handedness, // R-hand = 1, L-hand = -1 const G4double kappa, // tan(TwistAngle/2)/fZHalfLen const EAxis axis0 = kXAxis, const EAxis axis1 = kZAxis, G4double axis0min = -kInfinity, G4double axis1min = -kInfinity, G4double axis0max = kInfinity, G4double axis1max = kInfinity ); /** * Alternative Construct for a cylinder twisted boundary surface. * @param[in] name The surface name. * @param[in] EndInnerRadius Inner-hype radius at z=0. * @param[in] EndOuterRadius Outer-hype radius at z=0. * @param[in] DPhi Phi angle. * @param[in] EndPhi Total Phi. * @param[in] EndZ Z length. * @param[in] InnerRadius Inner radius. * @param[in] OuterRadius Outer radius. * @param[in] Kappa Kappa=tan(TwistAngle/2)/fZHalfLen. * @param[in] handedness Orientation: R-hand = 1, L-hand = -1. */ G4TwistTubsSide(const G4String& name, G4double EndInnerRadius[2], G4double EndOuterRadius[2], G4double DPhi, G4double EndPhi[2], G4double EndZ[2], G4double InnerRadius, G4double OuterRadius, G4double Kappa, G4int handedness); /** * Default destructor. */ ~G4TwistTubsSide() override = default; /** * Returns a normal vector at a surface (or very close to the surface) * point at 'p'. * @param[in] p The point where computing the normal. * @param[in] isGlobal If true, it returns the normal in global coordinates. * @returns The normal vector. */ G4ThreeVector GetNormal(const G4ThreeVector& p, G4bool isGlobal = false) override ; /** * Returns the distance to surface, given point 'gp' and direction 'gv'. * @param[in] gp The point from where computing the distance. * @param[in] gv The direction along which computing the distance. * @param[out] gxx Vector of global points based on number of solutions. * @param[out] distance The distance vector based on number of solutions. * @param[out] areacode The location vector based on number of solutions. * @param[out] isvalid Validity vector based on number of solutions. * @param[in] validate Adopted validation criteria. * @returns The number of solutions. */ G4int DistanceToSurface(const G4ThreeVector& gp, const G4ThreeVector& gv, G4ThreeVector gxx[], G4double distance[], G4int areacode[], G4bool isvalid[], EValidate validate = kValidateWithTol) override; /** * Returns the safety distance to surface, given point 'gp'. * @param[in] gp The point from where computing the safety distance. * @param[out] gxx Vector of global points based on number of solutions. * @param[out] distance The distance vector based on number of solutions. * @param[out] areacode The location vector based on number of solutions. * @returns The number of solutions. */ G4int DistanceToSurface(const G4ThreeVector& gp, G4ThreeVector gxx[], G4double distance[], G4int areacode[]) override; /** * Get projection at p.z() on the surface. */ inline G4ThreeVector ProjectAtPXPZ(const G4ThreeVector& p, G4bool isglobal = false) const ; G4TwistTubsSide(__void__&); // Fake default constructor for usage restricted to direct object // persistency for clients requiring preallocation of memory for // persistifiable objects. private: /** * Returns point on surface given 'x' and 'z'. */ inline G4ThreeVector SurfacePoint(G4double x, G4double z, G4bool isGlobal = false) override ; /** * Internal accessors. */ inline G4double GetBoundaryMin(G4double phi) override ; inline G4double GetBoundaryMax(G4double phi) override ; inline G4double GetSurfaceArea() override ; void GetFacets( G4int m, G4int n, G4double xyz[][3], G4int faces[][4], G4int iside ) override ; /** * Internal method to compute the distance to a plane. */ G4double DistanceToPlane(const G4ThreeVector& p, const G4ThreeVector& A, const G4ThreeVector& B, const G4ThreeVector& C, const G4ThreeVector& D, const G4int parity, G4ThreeVector& xx, G4ThreeVector& n); /** * Returns the area code for point 'xx' using or not surface tolerance. */ G4int GetAreaCode(const G4ThreeVector& xx, G4bool withTol = true) override; /** * Setters. */ void SetCorners() override; void SetCorners( G4double endInnerRad[2], G4double endOuterRad[2], G4double endPhi[2], G4double endZ[2] ) ; void SetBoundaries() override; private: G4double fKappa; // std::tan(TwistedAngle/2)/HalfLenZ; }; //======================================================== // inline functions //======================================================== inline G4ThreeVector G4TwistTubsSide::ProjectAtPXPZ(const G4ThreeVector& p, G4bool isglobal) const { // Get Rho at p.z() on Hyperbolic Surface. G4ThreeVector tmpp; if (isglobal) { tmpp = fRot.inverse()*p - fTrans; } else { tmpp = p; } G4ThreeVector xx(p.x(), p.x() * fKappa * p.z(), p.z()); if (isglobal) { return (fRot * xx + fTrans); } return xx; } inline G4ThreeVector G4TwistTubsSide::SurfacePoint(G4double x, G4double z, G4bool isGlobal) { G4ThreeVector SurfPoint( x , x * fKappa * z , z ) ; if (isGlobal) { return (fRot * SurfPoint + fTrans); } return SurfPoint; } inline G4double G4TwistTubsSide::GetBoundaryMin(G4double) { return fAxisMin[0] ; // inner radius at z = 0 } inline G4double G4TwistTubsSide::GetBoundaryMax(G4double) { return fAxisMax[0] ; // outer radius at z = 0 } inline G4double G4TwistTubsSide::GetSurfaceArea() { // approximation only return ( fAxisMax[0] - fAxisMin[0] ) * ( fAxisMax[1] - fAxisMin[1] ) ; } #endif