[831] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4TwistBoxSide.hh,v 1.5 2006/06/29 18:47:43 gunter Exp $ |
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| 28 | // |
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| 29 | // -------------------------------------------------------------------- |
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| 30 | // GEANT 4 class header file |
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| 31 | // |
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| 32 | // |
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| 33 | // G4TwistBoxSide |
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| 34 | // |
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| 35 | // Class description: |
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| 36 | // |
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| 37 | // Class describing a twisted boundary surface for a trapezoid. |
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| 38 | |
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| 39 | // Author: |
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| 40 | // |
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| 41 | // 27-Oct-2004 - O.Link (Oliver.Link@cern.ch) |
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| 42 | // |
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| 43 | // -------------------------------------------------------------------- |
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| 44 | #ifndef __G4TWISTBOXSIDE__ |
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| 45 | #define __G4TWISTBOXSIDE__ |
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| 46 | |
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| 47 | #include "G4VTwistSurface.hh" |
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| 48 | |
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| 49 | #include <vector> |
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| 50 | |
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| 51 | class G4TwistBoxSide : public G4VTwistSurface |
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| 52 | { |
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| 53 | public: // with description |
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| 54 | |
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| 55 | G4TwistBoxSide(const G4String &name, |
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| 56 | G4double PhiTwist, // twist angle |
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| 57 | G4double pDz, // half z lenght |
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| 58 | G4double pTheta, // direction between end planes |
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| 59 | G4double pPhi, // by polar and azimutal angles |
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| 60 | G4double pDy1, // half y length at -pDz |
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| 61 | G4double pDx1, // half x length at -pDz,-pDy |
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| 62 | G4double pDx2, // half x length at -pDz,+pDy |
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| 63 | G4double pDy2, // half y length at +pDz |
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| 64 | G4double pDx3, // half x length at +pDz,-pDy |
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| 65 | G4double pDx4, // half x length at +pDz,+pDy |
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| 66 | G4double pAlph, // tilt angle at +pDz |
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| 67 | G4double AngleSide // parity |
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| 68 | ); |
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| 69 | |
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| 70 | virtual ~G4TwistBoxSide(); |
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| 71 | |
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| 72 | virtual G4ThreeVector GetNormal(const G4ThreeVector &xx, |
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| 73 | G4bool isGlobal = false) ; |
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| 74 | |
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| 75 | virtual G4int DistanceToSurface(const G4ThreeVector &gp, |
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| 76 | const G4ThreeVector &gv, |
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| 77 | G4ThreeVector gxx[], |
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| 78 | G4double distance[], |
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| 79 | G4int areacode[], |
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| 80 | G4bool isvalid[], |
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| 81 | EValidate validate = kValidateWithTol); |
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| 82 | |
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| 83 | virtual G4int DistanceToSurface(const G4ThreeVector &gp, |
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| 84 | G4ThreeVector gxx[], |
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| 85 | G4double distance[], |
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| 86 | G4int areacode[]); |
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| 87 | |
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| 88 | public: // without description |
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| 89 | |
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| 90 | G4TwistBoxSide(__void__&); |
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| 91 | // Fake default constructor for usage restricted to direct object |
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| 92 | // persistency for clients requiring preallocation of memory for |
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| 93 | // persistifiable objects. |
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| 94 | |
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| 95 | private: |
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| 96 | |
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| 97 | virtual G4int GetAreaCode(const G4ThreeVector &xx, |
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| 98 | G4bool withTol = true); |
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| 99 | virtual void SetCorners(); |
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| 100 | virtual void SetBoundaries(); |
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| 101 | |
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| 102 | void GetPhiUAtX(G4ThreeVector p, G4double &phi, G4double &u); |
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| 103 | G4ThreeVector ProjectPoint(const G4ThreeVector &p, |
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| 104 | G4bool isglobal = false); |
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| 105 | |
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| 106 | virtual G4ThreeVector SurfacePoint(G4double phi, G4double u, |
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| 107 | G4bool isGlobal = false); |
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| 108 | virtual G4double GetBoundaryMin(G4double phi); |
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| 109 | virtual G4double GetBoundaryMax(G4double phi); |
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| 110 | virtual G4double GetSurfaceArea(); |
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| 111 | virtual void GetFacets( G4int m, G4int n, G4double xyz[][3], |
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| 112 | G4int faces[][4], G4int iside ); |
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| 113 | |
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| 114 | inline G4double GetValueA(G4double phi); |
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| 115 | inline G4double GetValueB(G4double phi); |
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| 116 | inline G4ThreeVector NormAng(G4double phi, G4double u); |
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| 117 | inline G4double Xcoef(G4double u,G4double phi); |
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| 118 | // To calculate the w(u) function |
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| 119 | |
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| 120 | private: |
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| 121 | |
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| 122 | G4double fTheta; |
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| 123 | G4double fPhi ; |
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| 124 | |
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| 125 | G4double fDy1; |
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| 126 | G4double fDx1; |
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| 127 | G4double fDx2; |
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| 128 | |
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| 129 | G4double fDy2; |
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| 130 | G4double fDx3; |
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| 131 | G4double fDx4; |
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| 132 | |
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| 133 | G4double fDz; // Half-length along the z axis |
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| 134 | |
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| 135 | G4double fAlph; |
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| 136 | G4double fTAlph; // std::tan(fAlph) |
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| 137 | |
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| 138 | G4double fPhiTwist; // twist angle ( dphi in surface equation) |
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| 139 | |
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| 140 | G4double fAngleSide; |
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| 141 | |
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| 142 | G4double fdeltaX; |
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| 143 | G4double fdeltaY; |
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| 144 | |
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| 145 | G4double fDx4plus2; // fDx4 + fDx2 == a2/2 + a1/2 |
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| 146 | G4double fDx4minus2; // fDx4 - fDx2 - |
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| 147 | G4double fDx3plus1; // fDx3 + fDx1 == d2/2 + d1/2 |
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| 148 | G4double fDx3minus1; // fDx3 - fDx1 - |
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| 149 | G4double fDy2plus1; // fDy2 + fDy1 == b2/2 + b1/2 |
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| 150 | G4double fDy2minus1; // fDy2 - fDy1 - |
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| 151 | G4double fa1md1; // 2 fDx2 - 2 fDx1 == a1 - d1 |
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| 152 | G4double fa2md2; // 2 fDx4 - 2 fDx3 |
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| 153 | }; |
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| 154 | |
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| 155 | //======================================================== |
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| 156 | // inline functions |
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| 157 | //======================================================== |
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| 158 | |
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| 159 | inline |
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| 160 | G4double G4TwistBoxSide::GetValueA(G4double phi) |
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| 161 | { |
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| 162 | return ( fDx4plus2 + fDx4minus2 * ( 2 * phi ) / fPhiTwist ) ; |
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| 163 | } |
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| 164 | |
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| 165 | |
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| 166 | inline |
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| 167 | G4double G4TwistBoxSide::GetValueB(G4double phi) |
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| 168 | { |
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| 169 | return ( fDy2plus1 + fDy2minus1 * ( 2 * phi ) / fPhiTwist ) ; |
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| 170 | } |
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| 171 | |
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| 172 | inline |
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| 173 | G4double G4TwistBoxSide::Xcoef(G4double u, G4double phi) |
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| 174 | { |
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| 175 | |
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| 176 | return GetValueA(phi)/2. + u*fTAlph ; |
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| 177 | |
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| 178 | } |
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| 179 | |
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| 180 | inline G4ThreeVector |
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| 181 | G4TwistBoxSide::SurfacePoint( G4double phi, G4double u, G4bool isGlobal ) |
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| 182 | { |
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| 183 | // function to calculate a point on the surface, given by parameters phi,u |
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| 184 | |
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| 185 | G4ThreeVector SurfPoint ( Xcoef(u,phi) * std::cos(phi) |
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| 186 | - u * std::sin(phi) + fdeltaX*phi/fPhiTwist, |
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| 187 | Xcoef(u,phi) * std::sin(phi) |
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| 188 | + u * std::cos(phi) + fdeltaY*phi/fPhiTwist, |
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| 189 | 2*fDz*phi/fPhiTwist ); |
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| 190 | |
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| 191 | if (isGlobal) { return (fRot * SurfPoint + fTrans); } |
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| 192 | return SurfPoint; |
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| 193 | } |
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| 194 | |
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| 195 | inline |
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| 196 | G4double G4TwistBoxSide::GetBoundaryMin(G4double phi) |
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| 197 | { |
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| 198 | return -0.5*GetValueB(phi) ; |
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| 199 | } |
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| 200 | |
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| 201 | inline |
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| 202 | G4double G4TwistBoxSide::GetBoundaryMax(G4double phi) |
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| 203 | { |
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| 204 | return 0.5*GetValueB(phi) ; |
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| 205 | } |
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| 206 | |
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| 207 | inline |
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| 208 | G4double G4TwistBoxSide::GetSurfaceArea() |
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| 209 | { |
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| 210 | return (fDz*(std::sqrt(16*fDy1*fDy1 |
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| 211 | + (fa1md1 + 4*fDy1*fTAlph)*(fa1md1 + 4*fDy1*fTAlph)) |
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| 212 | + std::sqrt(16*fDy1*fDy1 + (fa2md2 + 4*fDy1*fTAlph) |
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| 213 | * (fa2md2 + 4*fDy1*fTAlph))))/2. ; |
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| 214 | } |
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| 215 | |
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| 216 | inline |
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| 217 | G4ThreeVector G4TwistBoxSide::NormAng( G4double phi, G4double u ) |
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| 218 | { |
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| 219 | // function to calculate the norm at a given point on the surface |
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| 220 | // replace a1-d1 |
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| 221 | |
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| 222 | G4ThreeVector nvec( 4*fDz*(std::cos(phi) + fTAlph*std::sin(phi)) , |
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| 223 | 4*fDz*(-(fTAlph*std::cos(phi)) + std::sin(phi)), |
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| 224 | (fDx2 + fDx4)*fPhiTwist*fTAlph |
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| 225 | + 2*fDx4minus2*(-1 + fTAlph*phi) |
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| 226 | + 2*fPhiTwist*(1 + fTAlph*fTAlph)*u |
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| 227 | - 2*(fdeltaX - fdeltaY*fTAlph)*std::cos(phi) |
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| 228 | - 2*(fdeltaY + fdeltaX*fTAlph)*std::sin(phi) ); |
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| 229 | return nvec.unit(); |
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| 230 | } |
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| 231 | |
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| 232 | #endif |
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