[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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[921] | 27 | // $Id: G4Tubs.cc,v 1.74 2008/11/06 15:26:53 gcosmo Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-02-cand-01 $ |
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[831] | 29 | // |
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| 30 | // |
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| 31 | // class G4Tubs |
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| 32 | // |
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| 33 | // History: |
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| 34 | // |
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| 35 | // 02.08.07 T.Nikitina: bug fixed in DistanceToOut(p,v,..) for negative value under sqrt |
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| 36 | // for the case: p on the surface and v is tangent to the surface |
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| 37 | // 11.05.07 T.Nikitina: bug fixed in DistanceToOut(p,v,..) for phi < 2pi |
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| 38 | // 03.05.05 V.Grichine: SurfaceNormal(p) according to J. Apostolakis proposal |
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| 39 | // 16.03.05 V.Grichine: SurfaceNormal(p) with edges/corners for boolean |
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| 40 | // 20.07.01 V.Grichine: bug fixed in Inside(p) |
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| 41 | // 20.02.01 V.Grichine: bug fixed in Inside(p) and CalculateExtent was |
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| 42 | // simplified base on G4Box::CalculateExtent |
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| 43 | // 07.12.00 V.Grichine: phi-section algorithm was changed in Inside(p) |
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| 44 | // 28.11.00 V.Grichine: bug fixed in Inside(p) |
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| 45 | // 31.10.00 V.Grichine: assign sr, sphi in Distance ToOut(p,v,...) |
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| 46 | // 08.08.00 V.Grichine: more stable roots of 2-equation in DistanceToOut(p,v,..) |
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| 47 | // 02.08.00 V.Grichine: point is outside check in Distance ToOut(p) |
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| 48 | // 17.05.00 V.Grichine: bugs (#76,#91) fixed in Distance ToOut(p,v,...) |
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| 49 | // 31.03.00 V.Grichine: bug fixed in Inside(p) |
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| 50 | // 19.11.99 V.Grichine: side = kNull in DistanceToOut(p,v,...) |
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| 51 | // 13.10.99 V.Grichine: bugs fixed in DistanceToIn(p,v) |
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| 52 | // 28.05.99 V.Grichine: bugs fixed in DistanceToOut(p,v,...) |
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| 53 | // 25.05.99 V.Grichine: bugs fixed in DistanceToIn(p,v) |
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| 54 | // 23.03.99 V.Grichine: bug fixed in DistanceToIn(p,v) |
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| 55 | // 09.10.98 V.Grichine: modifications in DistanceToOut(p,v,...) |
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| 56 | // 18.06.98 V.Grichine: n-normalisation in DistanceToOut(p,v) |
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| 57 | // |
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| 58 | // 1994-95 P.Kent: implementation |
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| 59 | // |
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| 60 | ///////////////////////////////////////////////////////////////////////// |
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| 61 | |
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| 62 | #include "G4Tubs.hh" |
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| 63 | |
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| 64 | #include "G4VoxelLimits.hh" |
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| 65 | #include "G4AffineTransform.hh" |
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| 66 | #include "G4GeometryTolerance.hh" |
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| 67 | |
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| 68 | #include "G4VPVParameterisation.hh" |
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| 69 | |
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| 70 | #include "Randomize.hh" |
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| 71 | |
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| 72 | #include "meshdefs.hh" |
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| 73 | |
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| 74 | #include "G4VGraphicsScene.hh" |
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| 75 | #include "G4Polyhedron.hh" |
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| 76 | #include "G4NURBS.hh" |
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| 77 | #include "G4NURBStube.hh" |
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| 78 | #include "G4NURBScylinder.hh" |
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| 79 | #include "G4NURBStubesector.hh" |
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| 80 | |
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| 81 | using namespace CLHEP; |
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| 82 | |
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| 83 | ///////////////////////////////////////////////////////////////////////// |
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| 84 | // |
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| 85 | // Constructor - check parameters, convert angles so 0<sphi+dpshi<=2_PI |
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| 86 | // - note if pdphi>2PI then reset to 2PI |
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| 87 | |
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| 88 | G4Tubs::G4Tubs( const G4String &pName, |
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| 89 | G4double pRMin, G4double pRMax, |
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| 90 | G4double pDz, |
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| 91 | G4double pSPhi, G4double pDPhi ) |
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| 92 | : G4CSGSolid(pName) |
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| 93 | { |
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| 94 | |
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| 95 | kRadTolerance = G4GeometryTolerance::GetInstance()->GetRadialTolerance(); |
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| 96 | kAngTolerance = G4GeometryTolerance::GetInstance()->GetAngularTolerance(); |
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| 97 | |
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| 98 | if (pDz>0) // Check z-len |
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| 99 | { |
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| 100 | fDz = pDz ; |
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| 101 | } |
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| 102 | else |
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| 103 | { |
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| 104 | G4cerr << "ERROR - G4Tubs()::G4Tubs(): " << GetName() << G4endl |
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| 105 | << " Negative Z half-length ! - " |
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| 106 | << pDz << G4endl; |
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| 107 | G4Exception("G4Tubs::G4Tubs()", "InvalidSetup", FatalException, |
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| 108 | "Invalid Z half-length"); |
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| 109 | } |
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[921] | 110 | if ( (pRMin < pRMax) && (pRMin >= 0) ) // Check radii |
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[831] | 111 | { |
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| 112 | fRMin = pRMin ; |
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| 113 | fRMax = pRMax ; |
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| 114 | } |
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| 115 | else |
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| 116 | { |
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| 117 | G4cerr << "ERROR - G4Tubs()::G4Tubs(): " << GetName() << G4endl |
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| 118 | << " Invalid values for radii !" << G4endl |
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| 119 | << " pRMin = " << pRMin << ", pRMax = " << pRMax << G4endl; |
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| 120 | G4Exception("G4Tubs::G4Tubs()", "InvalidSetup", FatalException, |
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| 121 | "Invalid radii."); |
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| 122 | } |
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[921] | 123 | |
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| 124 | fPhiFullTube = true; |
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| 125 | if ( pDPhi >= twopi-kAngTolerance*0.5 ) // Check angles |
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[831] | 126 | { |
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| 127 | fDPhi=twopi; |
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[921] | 128 | fSPhi=0; |
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[831] | 129 | } |
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| 130 | else |
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| 131 | { |
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[921] | 132 | fPhiFullTube = false; |
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[831] | 133 | if ( pDPhi > 0 ) |
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| 134 | { |
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| 135 | fDPhi = pDPhi; |
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| 136 | } |
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| 137 | else |
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| 138 | { |
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| 139 | G4cerr << "ERROR - G4Tubs()::G4Tubs(): " << GetName() << G4endl |
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| 140 | << " Negative delta-Phi ! - " |
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| 141 | << pDPhi << G4endl; |
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[921] | 142 | G4Exception("G4Tubs::G4Tubs()", "InvalidSetup", |
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| 143 | FatalException, "Invalid dphi."); |
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[831] | 144 | } |
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| 145 | |
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[921] | 146 | // Ensure fSphi in 0-2PI or -2PI-0 range if shape crosses 0 |
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[831] | 147 | |
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[921] | 148 | if ( pSPhi < 0 ) |
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| 149 | { |
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| 150 | fSPhi = twopi - std::fmod(std::fabs(pSPhi),twopi); |
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| 151 | } |
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| 152 | else |
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| 153 | { |
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| 154 | fSPhi = std::fmod(pSPhi,twopi) ; |
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| 155 | } |
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| 156 | if ( fSPhi+fDPhi > twopi ) |
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| 157 | { |
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| 158 | fSPhi -= twopi ; |
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| 159 | } |
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[831] | 160 | } |
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[921] | 161 | InitializeTrigonometry(); |
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[831] | 162 | } |
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| 163 | |
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| 164 | /////////////////////////////////////////////////////////////////////// |
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| 165 | // |
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| 166 | // Fake default constructor - sets only member data and allocates memory |
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| 167 | // for usage restricted to object persistency. |
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| 168 | // |
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| 169 | G4Tubs::G4Tubs( __void__& a ) |
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| 170 | : G4CSGSolid(a) |
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| 171 | { |
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| 172 | } |
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| 173 | |
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| 174 | ////////////////////////////////////////////////////////////////////////// |
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| 175 | // |
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| 176 | // Destructor |
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| 177 | |
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| 178 | G4Tubs::~G4Tubs() |
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| 179 | { |
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| 180 | } |
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| 181 | |
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| 182 | ///////////////////////////////////////////////////////////////////////// |
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| 183 | // |
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| 184 | // Dispatch to parameterisation for replication mechanism dimension |
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| 185 | // computation & modification. |
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| 186 | |
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| 187 | void G4Tubs::ComputeDimensions( G4VPVParameterisation* p, |
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| 188 | const G4int n, |
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| 189 | const G4VPhysicalVolume* pRep ) |
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| 190 | { |
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| 191 | p->ComputeDimensions(*this,n,pRep) ; |
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| 192 | } |
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| 193 | |
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| 194 | //////////////////////////////////////////////////////////////////////// |
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| 195 | // |
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| 196 | // Calculate extent under transform and specified limit |
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| 197 | |
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| 198 | G4bool G4Tubs::CalculateExtent( const EAxis pAxis, |
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| 199 | const G4VoxelLimits& pVoxelLimit, |
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| 200 | const G4AffineTransform& pTransform, |
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| 201 | G4double& pMin, |
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| 202 | G4double& pMax ) const |
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| 203 | { |
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| 204 | |
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| 205 | if ( !pTransform.IsRotated() && fDPhi == twopi && fRMin == 0 ) |
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| 206 | { |
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| 207 | // Special case handling for unrotated solid tubes |
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| 208 | // Compute x/y/z mins and maxs fro bounding box respecting limits, |
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| 209 | // with early returns if outside limits. Then switch() on pAxis, |
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| 210 | // and compute exact x and y limit for x/y case |
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| 211 | |
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| 212 | G4double xoffset, xMin, xMax ; |
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| 213 | G4double yoffset, yMin, yMax ; |
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| 214 | G4double zoffset, zMin, zMax ; |
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| 215 | |
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| 216 | G4double diff1, diff2, maxDiff, newMin, newMax ; |
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| 217 | G4double xoff1, xoff2, yoff1, yoff2, delta ; |
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| 218 | |
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| 219 | xoffset = pTransform.NetTranslation().x() ; |
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| 220 | xMin = xoffset - fRMax ; |
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| 221 | xMax = xoffset + fRMax ; |
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| 222 | |
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| 223 | if (pVoxelLimit.IsXLimited()) |
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| 224 | { |
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| 225 | if ( (xMin > pVoxelLimit.GetMaxXExtent()) |
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| 226 | || (xMax < pVoxelLimit.GetMinXExtent()) ) |
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| 227 | { |
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| 228 | return false; |
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| 229 | } |
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| 230 | else |
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| 231 | { |
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| 232 | if ( xMin < pVoxelLimit.GetMinXExtent() ) |
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| 233 | { |
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| 234 | xMin = pVoxelLimit.GetMinXExtent() ; |
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| 235 | } |
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| 236 | if (xMax > pVoxelLimit.GetMaxXExtent() ) |
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| 237 | { |
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| 238 | xMax = pVoxelLimit.GetMaxXExtent() ; |
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| 239 | } |
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| 240 | } |
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| 241 | } |
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| 242 | yoffset = pTransform.NetTranslation().y() ; |
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| 243 | yMin = yoffset - fRMax ; |
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| 244 | yMax = yoffset + fRMax ; |
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| 245 | |
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| 246 | if ( pVoxelLimit.IsYLimited() ) |
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| 247 | { |
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| 248 | if ( (yMin > pVoxelLimit.GetMaxYExtent()) |
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| 249 | || (yMax < pVoxelLimit.GetMinYExtent()) ) |
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| 250 | { |
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| 251 | return false ; |
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| 252 | } |
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| 253 | else |
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| 254 | { |
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| 255 | if ( yMin < pVoxelLimit.GetMinYExtent() ) |
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| 256 | { |
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| 257 | yMin = pVoxelLimit.GetMinYExtent() ; |
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| 258 | } |
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| 259 | if ( yMax > pVoxelLimit.GetMaxYExtent() ) |
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| 260 | { |
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| 261 | yMax=pVoxelLimit.GetMaxYExtent(); |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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| 265 | zoffset = pTransform.NetTranslation().z() ; |
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| 266 | zMin = zoffset - fDz ; |
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| 267 | zMax = zoffset + fDz ; |
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| 268 | |
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| 269 | if ( pVoxelLimit.IsZLimited() ) |
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| 270 | { |
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| 271 | if ( (zMin > pVoxelLimit.GetMaxZExtent()) |
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| 272 | || (zMax < pVoxelLimit.GetMinZExtent()) ) |
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| 273 | { |
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| 274 | return false ; |
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| 275 | } |
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| 276 | else |
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| 277 | { |
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| 278 | if ( zMin < pVoxelLimit.GetMinZExtent() ) |
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| 279 | { |
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| 280 | zMin = pVoxelLimit.GetMinZExtent() ; |
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| 281 | } |
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| 282 | if ( zMax > pVoxelLimit.GetMaxZExtent() ) |
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| 283 | { |
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| 284 | zMax = pVoxelLimit.GetMaxZExtent(); |
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| 285 | } |
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| 286 | } |
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| 287 | } |
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| 288 | switch ( pAxis ) // Known to cut cylinder |
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| 289 | { |
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| 290 | case kXAxis : |
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| 291 | { |
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| 292 | yoff1 = yoffset - yMin ; |
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| 293 | yoff2 = yMax - yoffset ; |
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| 294 | |
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[921] | 295 | if ( (yoff1 >= 0) && (yoff2 >= 0) ) // Y limits cross max/min x |
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| 296 | { // => no change |
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[831] | 297 | pMin = xMin ; |
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| 298 | pMax = xMax ; |
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| 299 | } |
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| 300 | else |
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| 301 | { |
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| 302 | // Y limits don't cross max/min x => compute max delta x, |
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| 303 | // hence new mins/maxs |
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| 304 | |
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| 305 | delta = fRMax*fRMax - yoff1*yoff1; |
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| 306 | diff1 = (delta>0.) ? std::sqrt(delta) : 0.; |
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| 307 | delta = fRMax*fRMax - yoff2*yoff2; |
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| 308 | diff2 = (delta>0.) ? std::sqrt(delta) : 0.; |
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| 309 | maxDiff = (diff1 > diff2) ? diff1:diff2; |
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| 310 | newMin = xoffset - maxDiff; |
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| 311 | newMax = xoffset + maxDiff; |
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| 312 | pMin = (newMin < xMin) ? xMin : newMin; |
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| 313 | pMax = (newMax > xMax) ? xMax : newMax; |
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| 314 | } |
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| 315 | break; |
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| 316 | } |
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| 317 | case kYAxis : |
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| 318 | { |
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| 319 | xoff1 = xoffset - xMin ; |
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| 320 | xoff2 = xMax - xoffset ; |
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| 321 | |
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[921] | 322 | if ( (xoff1 >= 0) && (xoff2 >= 0) ) // X limits cross max/min y |
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| 323 | { // => no change |
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[831] | 324 | pMin = yMin ; |
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| 325 | pMax = yMax ; |
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| 326 | } |
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| 327 | else |
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| 328 | { |
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| 329 | // X limits don't cross max/min y => compute max delta y, |
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| 330 | // hence new mins/maxs |
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| 331 | |
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| 332 | delta = fRMax*fRMax - xoff1*xoff1; |
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| 333 | diff1 = (delta>0.) ? std::sqrt(delta) : 0.; |
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| 334 | delta = fRMax*fRMax - xoff2*xoff2; |
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| 335 | diff2 = (delta>0.) ? std::sqrt(delta) : 0.; |
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| 336 | maxDiff = (diff1 > diff2) ? diff1 : diff2 ; |
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| 337 | newMin = yoffset - maxDiff ; |
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| 338 | newMax = yoffset + maxDiff ; |
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| 339 | pMin = (newMin < yMin) ? yMin : newMin ; |
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| 340 | pMax =(newMax > yMax) ? yMax : newMax ; |
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| 341 | } |
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| 342 | break ; |
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| 343 | } |
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| 344 | case kZAxis: |
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| 345 | { |
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| 346 | pMin = zMin ; |
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| 347 | pMax = zMax ; |
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| 348 | break ; |
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| 349 | } |
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| 350 | default: |
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| 351 | break; |
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| 352 | } |
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| 353 | pMin -= kCarTolerance ; |
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| 354 | pMax += kCarTolerance ; |
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| 355 | return true; |
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| 356 | } |
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| 357 | else // Calculate rotated vertex coordinates |
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| 358 | { |
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| 359 | G4int i, noEntries, noBetweenSections4 ; |
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| 360 | G4bool existsAfterClip = false ; |
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| 361 | G4ThreeVectorList* vertices = CreateRotatedVertices(pTransform) ; |
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| 362 | |
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| 363 | pMin = +kInfinity ; |
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| 364 | pMax = -kInfinity ; |
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| 365 | |
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| 366 | noEntries = vertices->size() ; |
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| 367 | noBetweenSections4 = noEntries - 4 ; |
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[921] | 368 | |
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[831] | 369 | for (i = 0 ; i < noEntries ; i += 4 ) |
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| 370 | { |
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[921] | 371 | ClipCrossSection(vertices, i, pVoxelLimit, pAxis, pMin, pMax) ; |
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[831] | 372 | } |
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| 373 | for (i = 0 ; i < noBetweenSections4 ; i += 4 ) |
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| 374 | { |
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[921] | 375 | ClipBetweenSections(vertices, i, pVoxelLimit, pAxis, pMin, pMax) ; |
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[831] | 376 | } |
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[921] | 377 | if ((pMin != kInfinity) || (pMax != -kInfinity) ) |
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[831] | 378 | { |
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| 379 | existsAfterClip = true ; |
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| 380 | pMin -= kCarTolerance ; // Add 2*tolerance to avoid precision troubles |
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| 381 | pMax += kCarTolerance ; |
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| 382 | } |
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| 383 | else |
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| 384 | { |
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| 385 | // Check for case where completely enveloping clipping volume |
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| 386 | // If point inside then we are confident that the solid completely |
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| 387 | // envelopes the clipping volume. Hence set min/max extents according |
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| 388 | // to clipping volume extents along the specified axis. |
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| 389 | |
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| 390 | G4ThreeVector clipCentre( |
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| 391 | (pVoxelLimit.GetMinXExtent()+pVoxelLimit.GetMaxXExtent())*0.5, |
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| 392 | (pVoxelLimit.GetMinYExtent()+pVoxelLimit.GetMaxYExtent())*0.5, |
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| 393 | (pVoxelLimit.GetMinZExtent()+pVoxelLimit.GetMaxZExtent())*0.5 ) ; |
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| 394 | |
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| 395 | if ( Inside(pTransform.Inverse().TransformPoint(clipCentre)) != kOutside ) |
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| 396 | { |
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| 397 | existsAfterClip = true ; |
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| 398 | pMin = pVoxelLimit.GetMinExtent(pAxis) ; |
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| 399 | pMax = pVoxelLimit.GetMaxExtent(pAxis) ; |
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| 400 | } |
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| 401 | } |
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| 402 | delete vertices; |
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| 403 | return existsAfterClip; |
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| 404 | } |
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| 405 | } |
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| 406 | |
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| 407 | |
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| 408 | /////////////////////////////////////////////////////////////////////////// |
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| 409 | // |
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| 410 | // Return whether point inside/outside/on surface |
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| 411 | |
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| 412 | EInside G4Tubs::Inside( const G4ThreeVector& p ) const |
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| 413 | { |
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| 414 | G4double r2,pPhi,tolRMin,tolRMax; |
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| 415 | EInside in = kOutside ; |
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[921] | 416 | static const G4double halfCarTolerance=kCarTolerance*0.5; |
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| 417 | static const G4double halfRadTolerance=kRadTolerance*0.5; |
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| 418 | static const G4double halfAngTolerance=kAngTolerance*0.5; |
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| 419 | |
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| 420 | if (std::fabs(p.z()) <= fDz - halfCarTolerance) |
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[831] | 421 | { |
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| 422 | r2 = p.x()*p.x() + p.y()*p.y() ; |
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| 423 | |
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[921] | 424 | if (fRMin) { tolRMin = fRMin + halfRadTolerance ; } |
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[831] | 425 | else { tolRMin = 0 ; } |
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| 426 | |
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[921] | 427 | tolRMax = fRMax - halfRadTolerance ; |
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[831] | 428 | |
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[921] | 429 | if ((r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax)) |
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[831] | 430 | { |
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[921] | 431 | if ( fPhiFullTube ) |
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[831] | 432 | { |
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| 433 | in = kInside ; |
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| 434 | } |
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| 435 | else |
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| 436 | { |
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| 437 | // Try inner tolerant phi boundaries (=>inside) |
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| 438 | // if not inside, try outer tolerant phi boundaries |
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| 439 | |
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[921] | 440 | if ((tolRMin==0)&&(p.x()<=halfCarTolerance)&&(p.y()<=halfCarTolerance)) |
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[831] | 441 | { |
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| 442 | in=kSurface; |
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| 443 | } |
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| 444 | else |
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| 445 | { |
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[921] | 446 | pPhi = std::atan2(p.y(),p.x()) ; |
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| 447 | if ( pPhi < -halfAngTolerance ) { pPhi += twopi; } // 0<=pPhi<2pi |
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[831] | 448 | |
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| 449 | if ( fSPhi >= 0 ) |
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| 450 | { |
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[921] | 451 | if ( (std::abs(pPhi) < halfAngTolerance) |
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| 452 | && (std::abs(fSPhi + fDPhi - twopi) < halfAngTolerance) ) |
---|
[831] | 453 | { |
---|
| 454 | pPhi += twopi ; // 0 <= pPhi < 2pi |
---|
| 455 | } |
---|
[921] | 456 | if ( (pPhi >= fSPhi + halfAngTolerance) |
---|
| 457 | && (pPhi <= fSPhi + fDPhi - halfAngTolerance) ) |
---|
[831] | 458 | { |
---|
| 459 | in = kInside ; |
---|
| 460 | } |
---|
[921] | 461 | else if ( (pPhi >= fSPhi - halfAngTolerance) |
---|
| 462 | && (pPhi <= fSPhi + fDPhi + halfAngTolerance) ) |
---|
[831] | 463 | { |
---|
| 464 | in = kSurface ; |
---|
| 465 | } |
---|
| 466 | } |
---|
| 467 | else // fSPhi < 0 |
---|
| 468 | { |
---|
[921] | 469 | if ( (pPhi <= fSPhi + twopi - halfAngTolerance) |
---|
| 470 | && (pPhi >= fSPhi + fDPhi + halfAngTolerance) ) {;} //kOutside |
---|
| 471 | else if ( (pPhi <= fSPhi + twopi + halfAngTolerance) |
---|
| 472 | && (pPhi >= fSPhi + fDPhi - halfAngTolerance) ) |
---|
[831] | 473 | { |
---|
| 474 | in = kSurface ; |
---|
| 475 | } |
---|
| 476 | else |
---|
| 477 | { |
---|
| 478 | in = kInside ; |
---|
| 479 | } |
---|
| 480 | } |
---|
| 481 | } |
---|
| 482 | } |
---|
| 483 | } |
---|
| 484 | else // Try generous boundaries |
---|
| 485 | { |
---|
[921] | 486 | tolRMin = fRMin - halfRadTolerance ; |
---|
| 487 | tolRMax = fRMax + halfRadTolerance ; |
---|
[831] | 488 | |
---|
| 489 | if ( tolRMin < 0 ) { tolRMin = 0; } |
---|
| 490 | |
---|
| 491 | if ( (r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax) ) |
---|
| 492 | { |
---|
[921] | 493 | if (fPhiFullTube || (r2 <=halfRadTolerance*halfRadTolerance) ) |
---|
| 494 | { // Continuous in phi or on z-axis |
---|
[831] | 495 | in = kSurface ; |
---|
| 496 | } |
---|
| 497 | else // Try outer tolerant phi boundaries only |
---|
| 498 | { |
---|
| 499 | pPhi = std::atan2(p.y(),p.x()) ; |
---|
| 500 | |
---|
[921] | 501 | if ( pPhi < -halfAngTolerance) { pPhi += twopi; } // 0<=pPhi<2pi |
---|
[831] | 502 | if ( fSPhi >= 0 ) |
---|
| 503 | { |
---|
[921] | 504 | if ( (std::abs(pPhi) < halfAngTolerance) |
---|
| 505 | && (std::abs(fSPhi + fDPhi - twopi) < halfAngTolerance) ) |
---|
[831] | 506 | { |
---|
| 507 | pPhi += twopi ; // 0 <= pPhi < 2pi |
---|
| 508 | } |
---|
[921] | 509 | if ( (pPhi >= fSPhi - halfAngTolerance) |
---|
| 510 | && (pPhi <= fSPhi + fDPhi + halfAngTolerance) ) |
---|
[831] | 511 | { |
---|
| 512 | in = kSurface ; |
---|
| 513 | } |
---|
| 514 | } |
---|
| 515 | else // fSPhi < 0 |
---|
| 516 | { |
---|
[921] | 517 | if ( (pPhi <= fSPhi + twopi - halfAngTolerance) |
---|
| 518 | && (pPhi >= fSPhi + fDPhi + halfAngTolerance) ) {;} // kOutside |
---|
[831] | 519 | else |
---|
| 520 | { |
---|
| 521 | in = kSurface ; |
---|
| 522 | } |
---|
| 523 | } |
---|
| 524 | } |
---|
| 525 | } |
---|
| 526 | } |
---|
| 527 | } |
---|
[921] | 528 | else if (std::fabs(p.z()) <= fDz + halfCarTolerance) |
---|
[831] | 529 | { // Check within tolerant r limits |
---|
| 530 | r2 = p.x()*p.x() + p.y()*p.y() ; |
---|
[921] | 531 | tolRMin = fRMin - halfRadTolerance ; |
---|
| 532 | tolRMax = fRMax + halfRadTolerance ; |
---|
[831] | 533 | |
---|
| 534 | if ( tolRMin < 0 ) { tolRMin = 0; } |
---|
| 535 | |
---|
| 536 | if ( (r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax) ) |
---|
| 537 | { |
---|
[921] | 538 | if (fPhiFullTube || (r2 <=halfRadTolerance*halfRadTolerance)) |
---|
| 539 | { // Continuous in phi or on z-axis |
---|
[831] | 540 | in = kSurface ; |
---|
| 541 | } |
---|
| 542 | else // Try outer tolerant phi boundaries |
---|
| 543 | { |
---|
| 544 | pPhi = std::atan2(p.y(),p.x()) ; |
---|
| 545 | |
---|
[921] | 546 | if ( pPhi < -halfAngTolerance ) { pPhi += twopi; } // 0<=pPhi<2pi |
---|
[831] | 547 | if ( fSPhi >= 0 ) |
---|
| 548 | { |
---|
[921] | 549 | if ( (std::abs(pPhi) < halfAngTolerance) |
---|
| 550 | && (std::abs(fSPhi + fDPhi - twopi) < halfAngTolerance) ) |
---|
[831] | 551 | { |
---|
| 552 | pPhi += twopi ; // 0 <= pPhi < 2pi |
---|
| 553 | } |
---|
[921] | 554 | if ( (pPhi >= fSPhi - halfAngTolerance) |
---|
| 555 | && (pPhi <= fSPhi + fDPhi + halfAngTolerance) ) |
---|
[831] | 556 | { |
---|
| 557 | in = kSurface; |
---|
| 558 | } |
---|
| 559 | } |
---|
| 560 | else // fSPhi < 0 |
---|
| 561 | { |
---|
[921] | 562 | if ( (pPhi <= fSPhi + twopi - halfAngTolerance) |
---|
| 563 | && (pPhi >= fSPhi + fDPhi + halfAngTolerance) ) {;} |
---|
[831] | 564 | else |
---|
| 565 | { |
---|
| 566 | in = kSurface ; |
---|
| 567 | } |
---|
| 568 | } |
---|
| 569 | } |
---|
| 570 | } |
---|
| 571 | } |
---|
| 572 | return in; |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | /////////////////////////////////////////////////////////////////////////// |
---|
| 576 | // |
---|
| 577 | // Return unit normal of surface closest to p |
---|
| 578 | // - note if point on z axis, ignore phi divided sides |
---|
| 579 | // - unsafe if point close to z axis a rmin=0 - no explicit checks |
---|
| 580 | |
---|
| 581 | G4ThreeVector G4Tubs::SurfaceNormal( const G4ThreeVector& p ) const |
---|
[921] | 582 | { |
---|
| 583 | G4int noSurfaces = 0; |
---|
[831] | 584 | G4double rho, pPhi; |
---|
| 585 | G4double distZ, distRMin, distRMax; |
---|
| 586 | G4double distSPhi = kInfinity, distEPhi = kInfinity; |
---|
[921] | 587 | |
---|
| 588 | static const G4double halfCarTolerance = 0.5*kCarTolerance; |
---|
| 589 | static const G4double halfAngTolerance = 0.5*kAngTolerance; |
---|
| 590 | |
---|
[831] | 591 | G4ThreeVector norm, sumnorm(0.,0.,0.); |
---|
| 592 | G4ThreeVector nZ = G4ThreeVector(0, 0, 1.0); |
---|
| 593 | G4ThreeVector nR, nPs, nPe; |
---|
| 594 | |
---|
| 595 | rho = std::sqrt(p.x()*p.x() + p.y()*p.y()); |
---|
| 596 | |
---|
| 597 | distRMin = std::fabs(rho - fRMin); |
---|
| 598 | distRMax = std::fabs(rho - fRMax); |
---|
| 599 | distZ = std::fabs(std::fabs(p.z()) - fDz); |
---|
| 600 | |
---|
[921] | 601 | if (!fPhiFullTube) // Protected against (0,0,z) |
---|
[831] | 602 | { |
---|
[921] | 603 | if ( rho > halfCarTolerance ) |
---|
[831] | 604 | { |
---|
| 605 | pPhi = std::atan2(p.y(),p.x()); |
---|
| 606 | |
---|
[921] | 607 | if(pPhi < fSPhi- halfCarTolerance) { pPhi += twopi; } |
---|
| 608 | else if(pPhi > fSPhi+fDPhi+ halfCarTolerance) { pPhi -= twopi; } |
---|
[831] | 609 | |
---|
[921] | 610 | distSPhi = std::fabs(pPhi - fSPhi); |
---|
[831] | 611 | distEPhi = std::fabs(pPhi - fSPhi - fDPhi); |
---|
| 612 | } |
---|
| 613 | else if( !fRMin ) |
---|
| 614 | { |
---|
| 615 | distSPhi = 0.; |
---|
| 616 | distEPhi = 0.; |
---|
| 617 | } |
---|
| 618 | nPs = G4ThreeVector(std::sin(fSPhi),-std::cos(fSPhi),0); |
---|
| 619 | nPe = G4ThreeVector(-std::sin(fSPhi+fDPhi),std::cos(fSPhi+fDPhi),0); |
---|
| 620 | } |
---|
[921] | 621 | if ( rho > halfCarTolerance ) { nR = G4ThreeVector(p.x()/rho,p.y()/rho,0); } |
---|
[831] | 622 | |
---|
[921] | 623 | if( distRMax <= halfCarTolerance ) |
---|
[831] | 624 | { |
---|
| 625 | noSurfaces ++; |
---|
| 626 | sumnorm += nR; |
---|
| 627 | } |
---|
[921] | 628 | if( fRMin && (distRMin <= halfCarTolerance) ) |
---|
[831] | 629 | { |
---|
| 630 | noSurfaces ++; |
---|
| 631 | sumnorm -= nR; |
---|
| 632 | } |
---|
| 633 | if( fDPhi < twopi ) |
---|
| 634 | { |
---|
[921] | 635 | if (distSPhi <= halfAngTolerance) |
---|
[831] | 636 | { |
---|
| 637 | noSurfaces ++; |
---|
| 638 | sumnorm += nPs; |
---|
| 639 | } |
---|
[921] | 640 | if (distEPhi <= halfAngTolerance) |
---|
[831] | 641 | { |
---|
| 642 | noSurfaces ++; |
---|
| 643 | sumnorm += nPe; |
---|
| 644 | } |
---|
| 645 | } |
---|
[921] | 646 | if (distZ <= halfCarTolerance) |
---|
[831] | 647 | { |
---|
| 648 | noSurfaces ++; |
---|
| 649 | if ( p.z() >= 0.) { sumnorm += nZ; } |
---|
| 650 | else { sumnorm -= nZ; } |
---|
| 651 | } |
---|
| 652 | if ( noSurfaces == 0 ) |
---|
| 653 | { |
---|
| 654 | #ifdef G4CSGDEBUG |
---|
| 655 | G4Exception("G4Tube::SurfaceNormal(p)", "Notification", |
---|
| 656 | JustWarning, "Point p is not on surface !?" ); |
---|
| 657 | G4cout.precision(20); |
---|
| 658 | G4cout<< "G4Tubs::SN ( "<<p.x()<<", "<<p.y()<<", "<<p.z()<<" ); " |
---|
| 659 | << G4endl << G4endl; |
---|
| 660 | #endif |
---|
| 661 | norm = ApproxSurfaceNormal(p); |
---|
| 662 | } |
---|
| 663 | else if ( noSurfaces == 1 ) { norm = sumnorm; } |
---|
| 664 | else { norm = sumnorm.unit(); } |
---|
[921] | 665 | |
---|
[831] | 666 | return norm; |
---|
| 667 | } |
---|
| 668 | |
---|
| 669 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 670 | // |
---|
| 671 | // Algorithm for SurfaceNormal() following the original specification |
---|
| 672 | // for points not on the surface |
---|
| 673 | |
---|
| 674 | G4ThreeVector G4Tubs::ApproxSurfaceNormal( const G4ThreeVector& p ) const |
---|
| 675 | { ENorm side ; |
---|
| 676 | G4ThreeVector norm ; |
---|
| 677 | G4double rho, phi ; |
---|
| 678 | G4double distZ, distRMin, distRMax, distSPhi, distEPhi, distMin ; |
---|
| 679 | |
---|
| 680 | rho = std::sqrt(p.x()*p.x() + p.y()*p.y()) ; |
---|
| 681 | |
---|
| 682 | distRMin = std::fabs(rho - fRMin) ; |
---|
| 683 | distRMax = std::fabs(rho - fRMax) ; |
---|
| 684 | distZ = std::fabs(std::fabs(p.z()) - fDz) ; |
---|
| 685 | |
---|
| 686 | if (distRMin < distRMax) // First minimum |
---|
| 687 | { |
---|
| 688 | if ( distZ < distRMin ) |
---|
| 689 | { |
---|
| 690 | distMin = distZ ; |
---|
| 691 | side = kNZ ; |
---|
| 692 | } |
---|
| 693 | else |
---|
| 694 | { |
---|
| 695 | distMin = distRMin ; |
---|
| 696 | side = kNRMin ; |
---|
| 697 | } |
---|
| 698 | } |
---|
| 699 | else |
---|
| 700 | { |
---|
| 701 | if ( distZ < distRMax ) |
---|
| 702 | { |
---|
| 703 | distMin = distZ ; |
---|
| 704 | side = kNZ ; |
---|
| 705 | } |
---|
| 706 | else |
---|
| 707 | { |
---|
| 708 | distMin = distRMax ; |
---|
| 709 | side = kNRMax ; |
---|
| 710 | } |
---|
| 711 | } |
---|
[921] | 712 | if (!fPhiFullTube && rho ) // Protected against (0,0,z) |
---|
[831] | 713 | { |
---|
| 714 | phi = std::atan2(p.y(),p.x()) ; |
---|
| 715 | |
---|
| 716 | if ( phi < 0 ) { phi += twopi; } |
---|
| 717 | |
---|
| 718 | if ( fSPhi < 0 ) |
---|
| 719 | { |
---|
| 720 | distSPhi = std::fabs(phi - (fSPhi + twopi))*rho ; |
---|
| 721 | } |
---|
| 722 | else |
---|
| 723 | { |
---|
| 724 | distSPhi = std::fabs(phi - fSPhi)*rho ; |
---|
| 725 | } |
---|
| 726 | distEPhi = std::fabs(phi - fSPhi - fDPhi)*rho ; |
---|
| 727 | |
---|
| 728 | if (distSPhi < distEPhi) // Find new minimum |
---|
| 729 | { |
---|
| 730 | if ( distSPhi < distMin ) |
---|
| 731 | { |
---|
| 732 | side = kNSPhi ; |
---|
| 733 | } |
---|
| 734 | } |
---|
| 735 | else |
---|
| 736 | { |
---|
| 737 | if ( distEPhi < distMin ) |
---|
| 738 | { |
---|
| 739 | side = kNEPhi ; |
---|
| 740 | } |
---|
| 741 | } |
---|
| 742 | } |
---|
| 743 | switch ( side ) |
---|
| 744 | { |
---|
| 745 | case kNRMin : // Inner radius |
---|
| 746 | { |
---|
[921] | 747 | norm = G4ThreeVector(-p.x()/rho, -p.y()/rho, 0) ; |
---|
[831] | 748 | break ; |
---|
| 749 | } |
---|
| 750 | case kNRMax : // Outer radius |
---|
| 751 | { |
---|
[921] | 752 | norm = G4ThreeVector(p.x()/rho, p.y()/rho, 0) ; |
---|
[831] | 753 | break ; |
---|
| 754 | } |
---|
| 755 | case kNZ : // + or - dz |
---|
| 756 | { |
---|
[921] | 757 | if ( p.z() > 0 ) { norm = G4ThreeVector(0,0,1) ; } |
---|
| 758 | else { norm = G4ThreeVector(0,0,-1); } |
---|
[831] | 759 | break ; |
---|
| 760 | } |
---|
| 761 | case kNSPhi: |
---|
| 762 | { |
---|
[921] | 763 | norm = G4ThreeVector(std::sin(fSPhi), -std::cos(fSPhi), 0) ; |
---|
[831] | 764 | break ; |
---|
| 765 | } |
---|
| 766 | case kNEPhi: |
---|
| 767 | { |
---|
[921] | 768 | norm = G4ThreeVector(-std::sin(fSPhi+fDPhi), std::cos(fSPhi+fDPhi), 0) ; |
---|
[831] | 769 | break; |
---|
| 770 | } |
---|
| 771 | default: |
---|
| 772 | { |
---|
| 773 | DumpInfo(); |
---|
| 774 | G4Exception("G4Tubs::ApproxSurfaceNormal()", "Notification", JustWarning, |
---|
| 775 | "Undefined side for valid surface normal to solid."); |
---|
| 776 | break ; |
---|
| 777 | } |
---|
| 778 | } |
---|
| 779 | return norm; |
---|
| 780 | } |
---|
| 781 | |
---|
| 782 | //////////////////////////////////////////////////////////////////// |
---|
| 783 | // |
---|
| 784 | // |
---|
| 785 | // Calculate distance to shape from outside, along normalised vector |
---|
| 786 | // - return kInfinity if no intersection, or intersection distance <= tolerance |
---|
| 787 | // |
---|
| 788 | // - Compute the intersection with the z planes |
---|
| 789 | // - if at valid r, phi, return |
---|
| 790 | // |
---|
| 791 | // -> If point is outer outer radius, compute intersection with rmax |
---|
| 792 | // - if at valid phi,z return |
---|
| 793 | // |
---|
| 794 | // -> Compute intersection with inner radius, taking largest +ve root |
---|
| 795 | // - if valid (in z,phi), save intersction |
---|
| 796 | // |
---|
| 797 | // -> If phi segmented, compute intersections with phi half planes |
---|
| 798 | // - return smallest of valid phi intersections and |
---|
| 799 | // inner radius intersection |
---|
| 800 | // |
---|
| 801 | // NOTE: |
---|
[921] | 802 | // - 'if valid' implies tolerant checking of intersection points |
---|
[831] | 803 | |
---|
| 804 | G4double G4Tubs::DistanceToIn( const G4ThreeVector& p, |
---|
| 805 | const G4ThreeVector& v ) const |
---|
| 806 | { |
---|
[921] | 807 | G4double snxt = kInfinity ; // snxt = default return value |
---|
| 808 | G4double tolORMin2, tolIRMax2 ; // 'generous' radii squared |
---|
| 809 | G4double tolORMax2, tolIRMin2, tolODz, tolIDz ; |
---|
[831] | 810 | |
---|
[921] | 811 | static const G4double halfCarTolerance = 0.5*kCarTolerance; |
---|
| 812 | static const G4double halfRadTolerance = 0.5*kRadTolerance; |
---|
[831] | 813 | |
---|
| 814 | // Intersection point variables |
---|
| 815 | // |
---|
[921] | 816 | G4double Dist, s, xi, yi, zi, rho2, inum, iden, cosPsi, Comp ; |
---|
| 817 | G4double t1, t2, t3, b, c, d ; // Quadratic solver variables |
---|
| 818 | |
---|
[831] | 819 | // Calculate tolerant rmin and rmax |
---|
| 820 | |
---|
| 821 | if (fRMin > kRadTolerance) |
---|
| 822 | { |
---|
[921] | 823 | tolORMin2 = (fRMin - halfRadTolerance)*(fRMin - halfRadTolerance) ; |
---|
| 824 | tolIRMin2 = (fRMin + halfRadTolerance)*(fRMin + halfRadTolerance) ; |
---|
[831] | 825 | } |
---|
| 826 | else |
---|
| 827 | { |
---|
| 828 | tolORMin2 = 0.0 ; |
---|
| 829 | tolIRMin2 = 0.0 ; |
---|
| 830 | } |
---|
[921] | 831 | tolORMax2 = (fRMax + halfRadTolerance)*(fRMax + halfRadTolerance) ; |
---|
| 832 | tolIRMax2 = (fRMax - halfRadTolerance)*(fRMax - halfRadTolerance) ; |
---|
[831] | 833 | |
---|
| 834 | // Intersection with Z surfaces |
---|
| 835 | |
---|
[921] | 836 | tolIDz = fDz - halfCarTolerance ; |
---|
| 837 | tolODz = fDz + halfCarTolerance ; |
---|
[831] | 838 | |
---|
| 839 | if (std::fabs(p.z()) >= tolIDz) |
---|
| 840 | { |
---|
| 841 | if ( p.z()*v.z() < 0 ) // at +Z going in -Z or visa versa |
---|
| 842 | { |
---|
[921] | 843 | s = (std::fabs(p.z()) - fDz)/std::fabs(v.z()) ; // Z intersect distance |
---|
[831] | 844 | |
---|
| 845 | if(s < 0.0) { s = 0.0; } |
---|
| 846 | |
---|
| 847 | xi = p.x() + s*v.x() ; // Intersection coords |
---|
| 848 | yi = p.y() + s*v.y() ; |
---|
| 849 | rho2 = xi*xi + yi*yi ; |
---|
| 850 | |
---|
| 851 | // Check validity of intersection |
---|
| 852 | |
---|
[921] | 853 | if ((tolIRMin2 <= rho2) && (rho2 <= tolIRMax2)) |
---|
[831] | 854 | { |
---|
[921] | 855 | if (!fPhiFullTube && rho2) |
---|
[831] | 856 | { |
---|
| 857 | // Psi = angle made with central (average) phi of shape |
---|
| 858 | // |
---|
| 859 | inum = xi*cosCPhi + yi*sinCPhi ; |
---|
| 860 | iden = std::sqrt(rho2) ; |
---|
| 861 | cosPsi = inum/iden ; |
---|
[921] | 862 | if (cosPsi >= cosHDPhiIT) { return s ; } |
---|
[831] | 863 | } |
---|
| 864 | else |
---|
| 865 | { |
---|
| 866 | return s ; |
---|
| 867 | } |
---|
| 868 | } |
---|
| 869 | } |
---|
| 870 | else |
---|
| 871 | { |
---|
[921] | 872 | if ( snxt<halfCarTolerance ) { snxt=0; } |
---|
[831] | 873 | return snxt ; // On/outside extent, and heading away |
---|
| 874 | // -> cannot intersect |
---|
| 875 | } |
---|
| 876 | } |
---|
| 877 | |
---|
| 878 | // -> Can not intersect z surfaces |
---|
| 879 | // |
---|
| 880 | // Intersection with rmax (possible return) and rmin (must also check phi) |
---|
| 881 | // |
---|
| 882 | // Intersection point (xi,yi,zi) on line x=p.x+t*v.x etc. |
---|
| 883 | // |
---|
| 884 | // Intersects with x^2+y^2=R^2 |
---|
| 885 | // |
---|
| 886 | // Hence (v.x^2+v.y^2)t^2+ 2t(p.x*v.x+p.y*v.y)+p.x^2+p.y^2-R^2=0 |
---|
| 887 | // t1 t2 t3 |
---|
| 888 | |
---|
| 889 | t1 = 1.0 - v.z()*v.z() ; |
---|
| 890 | t2 = p.x()*v.x() + p.y()*v.y() ; |
---|
| 891 | t3 = p.x()*p.x() + p.y()*p.y() ; |
---|
| 892 | |
---|
| 893 | if ( t1 > 0 ) // Check not || to z axis |
---|
| 894 | { |
---|
| 895 | b = t2/t1 ; |
---|
| 896 | c = t3 - fRMax*fRMax ; |
---|
[921] | 897 | if ((t3 >= tolORMax2) && (t2<0)) // This also handles the tangent case |
---|
[831] | 898 | { |
---|
| 899 | // Try outer cylinder intersection |
---|
| 900 | // c=(t3-fRMax*fRMax)/t1; |
---|
| 901 | |
---|
| 902 | c /= t1 ; |
---|
| 903 | d = b*b - c ; |
---|
| 904 | |
---|
| 905 | if (d >= 0) // If real root |
---|
| 906 | { |
---|
| 907 | s = -b - std::sqrt(d) ; |
---|
| 908 | if (s >= 0) // If 'forwards' |
---|
| 909 | { |
---|
| 910 | // Check z intersection |
---|
| 911 | // |
---|
| 912 | zi = p.z() + s*v.z() ; |
---|
| 913 | if (std::fabs(zi)<=tolODz) |
---|
| 914 | { |
---|
| 915 | // Z ok. Check phi intersection if reqd |
---|
| 916 | // |
---|
[921] | 917 | if (fPhiFullTube) |
---|
[831] | 918 | { |
---|
| 919 | return s ; |
---|
| 920 | } |
---|
| 921 | else |
---|
| 922 | { |
---|
| 923 | xi = p.x() + s*v.x() ; |
---|
| 924 | yi = p.y() + s*v.y() ; |
---|
| 925 | cosPsi = (xi*cosCPhi + yi*sinCPhi)/fRMax ; |
---|
[921] | 926 | if (cosPsi >= cosHDPhiIT) { return s ; } |
---|
[831] | 927 | } |
---|
| 928 | } // end if std::fabs(zi) |
---|
| 929 | } // end if (s>=0) |
---|
| 930 | } // end if (d>=0) |
---|
| 931 | } // end if (r>=fRMax) |
---|
| 932 | else |
---|
| 933 | { |
---|
| 934 | // Inside outer radius : |
---|
| 935 | // check not inside, and heading through tubs (-> 0 to in) |
---|
| 936 | |
---|
[921] | 937 | if ((t3 > tolIRMin2) && (t2 < 0) && (std::fabs(p.z()) <= tolIDz)) |
---|
[831] | 938 | { |
---|
| 939 | // Inside both radii, delta r -ve, inside z extent |
---|
| 940 | |
---|
[921] | 941 | if (!fPhiFullTube) |
---|
[831] | 942 | { |
---|
| 943 | inum = p.x()*cosCPhi + p.y()*sinCPhi ; |
---|
| 944 | iden = std::sqrt(t3) ; |
---|
| 945 | cosPsi = inum/iden ; |
---|
[850] | 946 | if (cosPsi >= cosHDPhiIT) |
---|
| 947 | { |
---|
| 948 | // In the old version, the small negative tangent for the point |
---|
| 949 | // on surface was not taken in account, and returning 0.0 ... |
---|
| 950 | // New version: check the tangent for the point on surface and |
---|
| 951 | // if no intersection, return kInfinity, if intersection instead |
---|
| 952 | // return s. |
---|
| 953 | // |
---|
| 954 | c = t3-fRMax*fRMax; |
---|
| 955 | if ( c<=0.0 ) |
---|
| 956 | { |
---|
| 957 | return 0.0; |
---|
| 958 | } |
---|
| 959 | else |
---|
| 960 | { |
---|
| 961 | c = c/t1 ; |
---|
| 962 | d = b*b-c; |
---|
| 963 | if ( d>=0.0 ) |
---|
| 964 | { |
---|
| 965 | snxt = c/(-b+std::sqrt(d)); // using safe solution |
---|
| 966 | // for quadratic equation |
---|
[921] | 967 | if ( snxt < halfCarTolerance ) { snxt=0; } |
---|
[850] | 968 | return snxt ; |
---|
| 969 | } |
---|
| 970 | else |
---|
| 971 | { |
---|
| 972 | return kInfinity; |
---|
| 973 | } |
---|
| 974 | } |
---|
| 975 | } |
---|
[831] | 976 | } |
---|
| 977 | else |
---|
[850] | 978 | { |
---|
| 979 | // In the old version, the small negative tangent for the point |
---|
| 980 | // on surface was not taken in account, and returning 0.0 ... |
---|
| 981 | // New version: check the tangent for the point on surface and |
---|
| 982 | // if no intersection, return kInfinity, if intersection instead |
---|
| 983 | // return s. |
---|
| 984 | // |
---|
| 985 | c = t3 - fRMax*fRMax; |
---|
| 986 | if ( c<=0.0 ) |
---|
| 987 | { |
---|
| 988 | return 0.0; |
---|
| 989 | } |
---|
| 990 | else |
---|
| 991 | { |
---|
| 992 | c = c/t1 ; |
---|
| 993 | d = b*b-c; |
---|
| 994 | if ( d>=0.0 ) |
---|
| 995 | { |
---|
| 996 | snxt= c/(-b+std::sqrt(d)); // using safe solution |
---|
| 997 | // for quadratic equation |
---|
[921] | 998 | if ( snxt < halfCarTolerance ) { snxt=0; } |
---|
[850] | 999 | return snxt ; |
---|
| 1000 | } |
---|
| 1001 | else |
---|
| 1002 | { |
---|
| 1003 | return kInfinity; |
---|
| 1004 | } |
---|
| 1005 | } |
---|
[921] | 1006 | } // end if (!fPhiFullTube) |
---|
[850] | 1007 | } // end if (t3>tolIRMin2) |
---|
| 1008 | } // end if (Inside Outer Radius) |
---|
[831] | 1009 | if ( fRMin ) // Try inner cylinder intersection |
---|
| 1010 | { |
---|
| 1011 | c = (t3 - fRMin*fRMin)/t1 ; |
---|
| 1012 | d = b*b - c ; |
---|
| 1013 | if ( d >= 0.0 ) // If real root |
---|
| 1014 | { |
---|
| 1015 | // Always want 2nd root - we are outside and know rmax Hit was bad |
---|
| 1016 | // - If on surface of rmin also need farthest root |
---|
| 1017 | |
---|
| 1018 | s = -b + std::sqrt(d) ; |
---|
[921] | 1019 | if (s >= -halfCarTolerance) // check forwards |
---|
[831] | 1020 | { |
---|
| 1021 | // Check z intersection |
---|
| 1022 | // |
---|
| 1023 | if(s < 0.0) { s = 0.0; } |
---|
| 1024 | zi = p.z() + s*v.z() ; |
---|
| 1025 | if (std::fabs(zi) <= tolODz) |
---|
| 1026 | { |
---|
| 1027 | // Z ok. Check phi |
---|
| 1028 | // |
---|
[921] | 1029 | if ( fPhiFullTube ) |
---|
[831] | 1030 | { |
---|
| 1031 | return s ; |
---|
| 1032 | } |
---|
| 1033 | else |
---|
| 1034 | { |
---|
| 1035 | xi = p.x() + s*v.x() ; |
---|
| 1036 | yi = p.y() + s*v.y() ; |
---|
| 1037 | cosPsi = (xi*cosCPhi + yi*sinCPhi)/fRMin ; |
---|
| 1038 | if (cosPsi >= cosHDPhiIT) |
---|
| 1039 | { |
---|
| 1040 | // Good inner radius isect |
---|
| 1041 | // - but earlier phi isect still possible |
---|
| 1042 | |
---|
| 1043 | snxt = s ; |
---|
| 1044 | } |
---|
| 1045 | } |
---|
| 1046 | } // end if std::fabs(zi) |
---|
| 1047 | } // end if (s>=0) |
---|
| 1048 | } // end if (d>=0) |
---|
| 1049 | } // end if (fRMin) |
---|
| 1050 | } |
---|
| 1051 | |
---|
| 1052 | // Phi segment intersection |
---|
| 1053 | // |
---|
| 1054 | // o Tolerant of points inside phi planes by up to kCarTolerance*0.5 |
---|
| 1055 | // |
---|
| 1056 | // o NOTE: Large duplication of code between sphi & ephi checks |
---|
| 1057 | // -> only diffs: sphi -> ephi, Comp -> -Comp and half-plane |
---|
| 1058 | // intersection check <=0 -> >=0 |
---|
| 1059 | // -> use some form of loop Construct ? |
---|
| 1060 | // |
---|
[921] | 1061 | if ( !fPhiFullTube ) |
---|
[831] | 1062 | { |
---|
| 1063 | // First phi surface (Starting phi) |
---|
[921] | 1064 | // |
---|
[831] | 1065 | Comp = v.x()*sinSPhi - v.y()*cosSPhi ; |
---|
| 1066 | |
---|
| 1067 | if ( Comp < 0 ) // Component in outwards normal dirn |
---|
| 1068 | { |
---|
| 1069 | Dist = (p.y()*cosSPhi - p.x()*sinSPhi) ; |
---|
| 1070 | |
---|
[921] | 1071 | if ( Dist < halfCarTolerance ) |
---|
[831] | 1072 | { |
---|
| 1073 | s = Dist/Comp ; |
---|
| 1074 | |
---|
| 1075 | if (s < snxt) |
---|
| 1076 | { |
---|
| 1077 | if ( s < 0 ) { s = 0.0; } |
---|
| 1078 | zi = p.z() + s*v.z() ; |
---|
| 1079 | if ( std::fabs(zi) <= tolODz ) |
---|
| 1080 | { |
---|
| 1081 | xi = p.x() + s*v.x() ; |
---|
| 1082 | yi = p.y() + s*v.y() ; |
---|
| 1083 | rho2 = xi*xi + yi*yi ; |
---|
| 1084 | |
---|
| 1085 | if ( ( (rho2 >= tolIRMin2) && (rho2 <= tolIRMax2) ) |
---|
| 1086 | || ( (rho2 > tolORMin2) && (rho2 < tolIRMin2) |
---|
| 1087 | && ( v.y()*cosSPhi - v.x()*sinSPhi > 0 ) |
---|
| 1088 | && ( v.x()*cosSPhi + v.y()*sinSPhi >= 0 ) ) |
---|
| 1089 | || ( (rho2 > tolIRMax2) && (rho2 < tolORMax2) |
---|
| 1090 | && (v.y()*cosSPhi - v.x()*sinSPhi > 0) |
---|
| 1091 | && (v.x()*cosSPhi + v.y()*sinSPhi < 0) ) ) |
---|
| 1092 | { |
---|
| 1093 | // z and r intersections good |
---|
| 1094 | // - check intersecting with correct half-plane |
---|
| 1095 | // |
---|
[921] | 1096 | if ((yi*cosCPhi-xi*sinCPhi) <= halfCarTolerance) { snxt = s; } |
---|
| 1097 | } |
---|
[831] | 1098 | } |
---|
| 1099 | } |
---|
| 1100 | } |
---|
| 1101 | } |
---|
| 1102 | |
---|
[921] | 1103 | // Second phi surface (Ending phi) |
---|
[831] | 1104 | |
---|
| 1105 | Comp = -(v.x()*sinEPhi - v.y()*cosEPhi) ; |
---|
| 1106 | |
---|
| 1107 | if (Comp < 0 ) // Component in outwards normal dirn |
---|
| 1108 | { |
---|
| 1109 | Dist = -(p.y()*cosEPhi - p.x()*sinEPhi) ; |
---|
| 1110 | |
---|
[921] | 1111 | if ( Dist < halfCarTolerance ) |
---|
[831] | 1112 | { |
---|
| 1113 | s = Dist/Comp ; |
---|
| 1114 | |
---|
| 1115 | if (s < snxt) |
---|
| 1116 | { |
---|
| 1117 | if ( s < 0 ) { s = 0; } |
---|
| 1118 | zi = p.z() + s*v.z() ; |
---|
| 1119 | if ( std::fabs(zi) <= tolODz ) |
---|
| 1120 | { |
---|
| 1121 | xi = p.x() + s*v.x() ; |
---|
| 1122 | yi = p.y() + s*v.y() ; |
---|
| 1123 | rho2 = xi*xi + yi*yi ; |
---|
| 1124 | if ( ( (rho2 >= tolIRMin2) && (rho2 <= tolIRMax2) ) |
---|
| 1125 | || ( (rho2 > tolORMin2) && (rho2 < tolIRMin2) |
---|
| 1126 | && (v.x()*sinEPhi - v.y()*cosEPhi > 0) |
---|
| 1127 | && (v.x()*cosEPhi + v.y()*sinEPhi >= 0) ) |
---|
| 1128 | || ( (rho2 > tolIRMax2) && (rho2 < tolORMax2) |
---|
| 1129 | && (v.x()*sinEPhi - v.y()*cosEPhi > 0) |
---|
| 1130 | && (v.x()*cosEPhi + v.y()*sinEPhi < 0) ) ) |
---|
| 1131 | { |
---|
| 1132 | // z and r intersections good |
---|
| 1133 | // - check intersecting with correct half-plane |
---|
| 1134 | // |
---|
[921] | 1135 | if ( (yi*cosCPhi-xi*sinCPhi) >= 0 ) { snxt = s; } |
---|
| 1136 | } //?? >=-halfCarTolerance |
---|
[831] | 1137 | } |
---|
| 1138 | } |
---|
| 1139 | } |
---|
| 1140 | } // Comp < 0 |
---|
[921] | 1141 | } // !fPhiFullTube |
---|
| 1142 | if ( snxt<halfCarTolerance ) { snxt=0; } |
---|
[831] | 1143 | return snxt ; |
---|
| 1144 | } |
---|
| 1145 | |
---|
| 1146 | ////////////////////////////////////////////////////////////////// |
---|
| 1147 | // |
---|
| 1148 | // Calculate distance to shape from outside, along normalised vector |
---|
| 1149 | // - return kInfinity if no intersection, or intersection distance <= tolerance |
---|
| 1150 | // |
---|
| 1151 | // - Compute the intersection with the z planes |
---|
| 1152 | // - if at valid r, phi, return |
---|
| 1153 | // |
---|
| 1154 | // -> If point is outer outer radius, compute intersection with rmax |
---|
| 1155 | // - if at valid phi,z return |
---|
| 1156 | // |
---|
| 1157 | // -> Compute intersection with inner radius, taking largest +ve root |
---|
| 1158 | // - if valid (in z,phi), save intersction |
---|
| 1159 | // |
---|
| 1160 | // -> If phi segmented, compute intersections with phi half planes |
---|
| 1161 | // - return smallest of valid phi intersections and |
---|
| 1162 | // inner radius intersection |
---|
| 1163 | // |
---|
| 1164 | // NOTE: |
---|
| 1165 | // - Precalculations for phi trigonometry are Done `just in time' |
---|
| 1166 | // - `if valid' implies tolerant checking of intersection points |
---|
| 1167 | // Calculate distance (<= actual) to closest surface of shape from outside |
---|
| 1168 | // - Calculate distance to z, radial planes |
---|
| 1169 | // - Only to phi planes if outside phi extent |
---|
| 1170 | // - Return 0 if point inside |
---|
| 1171 | |
---|
| 1172 | G4double G4Tubs::DistanceToIn( const G4ThreeVector& p ) const |
---|
| 1173 | { |
---|
| 1174 | G4double safe=0.0, rho, safe1, safe2, safe3 ; |
---|
[921] | 1175 | G4double safePhi, cosPsi ; |
---|
[831] | 1176 | |
---|
| 1177 | rho = std::sqrt(p.x()*p.x() + p.y()*p.y()) ; |
---|
| 1178 | safe1 = fRMin - rho ; |
---|
| 1179 | safe2 = rho - fRMax ; |
---|
| 1180 | safe3 = std::fabs(p.z()) - fDz ; |
---|
| 1181 | |
---|
| 1182 | if ( safe1 > safe2 ) { safe = safe1; } |
---|
| 1183 | else { safe = safe2; } |
---|
| 1184 | if ( safe3 > safe ) { safe = safe3; } |
---|
| 1185 | |
---|
[921] | 1186 | if ( (!fPhiFullTube) && (rho) ) |
---|
[831] | 1187 | { |
---|
| 1188 | // Psi=angle from central phi to point |
---|
| 1189 | // |
---|
[921] | 1190 | cosPsi = (p.x()*cosCPhi + p.y()*sinCPhi)/rho ; |
---|
| 1191 | |
---|
[831] | 1192 | if ( cosPsi < std::cos(fDPhi*0.5) ) |
---|
| 1193 | { |
---|
| 1194 | // Point lies outside phi range |
---|
| 1195 | |
---|
[921] | 1196 | if ( (p.y()*cosCPhi - p.x()*sinCPhi) <= 0 ) |
---|
[831] | 1197 | { |
---|
[921] | 1198 | safePhi = std::fabs(p.x()*sinSPhi - p.y()*cosSPhi) ; |
---|
[831] | 1199 | } |
---|
| 1200 | else |
---|
| 1201 | { |
---|
[921] | 1202 | safePhi = std::fabs(p.x()*sinEPhi - p.y()*cosEPhi) ; |
---|
[831] | 1203 | } |
---|
| 1204 | if ( safePhi > safe ) { safe = safePhi; } |
---|
| 1205 | } |
---|
| 1206 | } |
---|
| 1207 | if ( safe < 0 ) { safe = 0; } |
---|
| 1208 | return safe ; |
---|
| 1209 | } |
---|
| 1210 | |
---|
| 1211 | ////////////////////////////////////////////////////////////////////////////// |
---|
| 1212 | // |
---|
| 1213 | // Calculate distance to surface of shape from `inside', allowing for tolerance |
---|
| 1214 | // - Only Calc rmax intersection if no valid rmin intersection |
---|
| 1215 | |
---|
| 1216 | G4double G4Tubs::DistanceToOut( const G4ThreeVector& p, |
---|
| 1217 | const G4ThreeVector& v, |
---|
| 1218 | const G4bool calcNorm, |
---|
| 1219 | G4bool *validNorm, |
---|
| 1220 | G4ThreeVector *n ) const |
---|
| 1221 | { |
---|
[921] | 1222 | ESide side=kNull , sider=kNull, sidephi=kNull ; |
---|
| 1223 | G4double snxt, sr=kInfinity, sphi=kInfinity, pdist ; |
---|
[831] | 1224 | G4double deltaR, t1, t2, t3, b, c, d2, roMin2 ; |
---|
| 1225 | |
---|
[921] | 1226 | static const G4double halfCarTolerance = kCarTolerance*0.5; |
---|
| 1227 | static const G4double halfAngTolerance = kAngTolerance*0.5; |
---|
| 1228 | |
---|
[831] | 1229 | // Vars for phi intersection: |
---|
| 1230 | |
---|
| 1231 | G4double pDistS, compS, pDistE, compE, sphi2, xi, yi, vphi, roi2 ; |
---|
| 1232 | |
---|
| 1233 | // Z plane intersection |
---|
| 1234 | |
---|
| 1235 | if (v.z() > 0 ) |
---|
| 1236 | { |
---|
| 1237 | pdist = fDz - p.z() ; |
---|
[921] | 1238 | if ( pdist > halfCarTolerance ) |
---|
[831] | 1239 | { |
---|
| 1240 | snxt = pdist/v.z() ; |
---|
| 1241 | side = kPZ ; |
---|
| 1242 | } |
---|
| 1243 | else |
---|
| 1244 | { |
---|
| 1245 | if (calcNorm) |
---|
| 1246 | { |
---|
| 1247 | *n = G4ThreeVector(0,0,1) ; |
---|
| 1248 | *validNorm = true ; |
---|
| 1249 | } |
---|
| 1250 | return snxt = 0 ; |
---|
| 1251 | } |
---|
| 1252 | } |
---|
| 1253 | else if ( v.z() < 0 ) |
---|
| 1254 | { |
---|
| 1255 | pdist = fDz + p.z() ; |
---|
| 1256 | |
---|
[921] | 1257 | if ( pdist > halfCarTolerance ) |
---|
[831] | 1258 | { |
---|
| 1259 | snxt = -pdist/v.z() ; |
---|
| 1260 | side = kMZ ; |
---|
| 1261 | } |
---|
| 1262 | else |
---|
| 1263 | { |
---|
| 1264 | if (calcNorm) |
---|
| 1265 | { |
---|
| 1266 | *n = G4ThreeVector(0,0,-1) ; |
---|
| 1267 | *validNorm = true ; |
---|
| 1268 | } |
---|
| 1269 | return snxt = 0.0 ; |
---|
| 1270 | } |
---|
| 1271 | } |
---|
| 1272 | else |
---|
| 1273 | { |
---|
| 1274 | snxt = kInfinity ; // Travel perpendicular to z axis |
---|
| 1275 | side = kNull; |
---|
| 1276 | } |
---|
| 1277 | |
---|
| 1278 | // Radial Intersections |
---|
| 1279 | // |
---|
[921] | 1280 | // Find intersection with cylinders at rmax/rmin |
---|
[831] | 1281 | // Intersection point (xi,yi,zi) on line x=p.x+t*v.x etc. |
---|
| 1282 | // |
---|
| 1283 | // Intersects with x^2+y^2=R^2 |
---|
| 1284 | // |
---|
| 1285 | // Hence (v.x^2+v.y^2)t^2+ 2t(p.x*v.x+p.y*v.y)+p.x^2+p.y^2-R^2=0 |
---|
| 1286 | // |
---|
| 1287 | // t1 t2 t3 |
---|
| 1288 | |
---|
| 1289 | t1 = 1.0 - v.z()*v.z() ; // since v normalised |
---|
| 1290 | t2 = p.x()*v.x() + p.y()*v.y() ; |
---|
| 1291 | t3 = p.x()*p.x() + p.y()*p.y() ; |
---|
| 1292 | |
---|
| 1293 | if ( snxt > 10*(fDz+fRMax) ) { roi2 = 2*fRMax*fRMax; } |
---|
| 1294 | else { roi2 = snxt*snxt*t1 + 2*snxt*t2 + t3; } // radius^2 on +-fDz |
---|
| 1295 | |
---|
| 1296 | if ( t1 > 0 ) // Check not parallel |
---|
| 1297 | { |
---|
| 1298 | // Calculate sr, r exit distance |
---|
| 1299 | |
---|
| 1300 | if ( (t2 >= 0.0) && (roi2 > fRMax*(fRMax + kRadTolerance)) ) |
---|
| 1301 | { |
---|
| 1302 | // Delta r not negative => leaving via rmax |
---|
| 1303 | |
---|
| 1304 | deltaR = t3 - fRMax*fRMax ; |
---|
| 1305 | |
---|
| 1306 | // NOTE: Should use rho-fRMax<-kRadTolerance*0.5 |
---|
| 1307 | // - avoid sqrt for efficiency |
---|
| 1308 | |
---|
| 1309 | if ( deltaR < -kRadTolerance*fRMax ) |
---|
| 1310 | { |
---|
| 1311 | b = t2/t1 ; |
---|
| 1312 | c = deltaR/t1 ; |
---|
[921] | 1313 | d2 = b*b-c; |
---|
| 1314 | if( d2 >= 0 ) { sr = -b + std::sqrt(d2); } |
---|
| 1315 | else { sr = 0.; } |
---|
[831] | 1316 | sider = kRMax ; |
---|
| 1317 | } |
---|
| 1318 | else |
---|
| 1319 | { |
---|
| 1320 | // On tolerant boundary & heading outwards (or perpendicular to) |
---|
| 1321 | // outer radial surface -> leaving immediately |
---|
| 1322 | |
---|
| 1323 | if ( calcNorm ) |
---|
| 1324 | { |
---|
| 1325 | *n = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ; |
---|
| 1326 | *validNorm = true ; |
---|
| 1327 | } |
---|
| 1328 | return snxt = 0 ; // Leaving by rmax immediately |
---|
| 1329 | } |
---|
| 1330 | } |
---|
| 1331 | else if ( t2 < 0. ) // i.e. t2 < 0; Possible rmin intersection |
---|
| 1332 | { |
---|
| 1333 | roMin2 = t3 - t2*t2/t1 ; // min ro2 of the plane of movement |
---|
| 1334 | |
---|
| 1335 | if ( fRMin && (roMin2 < fRMin*(fRMin - kRadTolerance)) ) |
---|
| 1336 | { |
---|
| 1337 | deltaR = t3 - fRMin*fRMin ; |
---|
| 1338 | b = t2/t1 ; |
---|
| 1339 | c = deltaR/t1 ; |
---|
| 1340 | d2 = b*b - c ; |
---|
| 1341 | |
---|
| 1342 | if ( d2 >= 0 ) // Leaving via rmin |
---|
| 1343 | { |
---|
| 1344 | // NOTE: SHould use rho-rmin>kRadTolerance*0.5 |
---|
| 1345 | // - avoid sqrt for efficiency |
---|
| 1346 | |
---|
| 1347 | if (deltaR > kRadTolerance*fRMin) |
---|
| 1348 | { |
---|
| 1349 | sr = -b-std::sqrt(d2) ; |
---|
| 1350 | sider = kRMin ; |
---|
| 1351 | } |
---|
| 1352 | else |
---|
| 1353 | { |
---|
| 1354 | if ( calcNorm ) { *validNorm = false; } // Concave side |
---|
| 1355 | return snxt = 0.0; |
---|
| 1356 | } |
---|
| 1357 | } |
---|
| 1358 | else // No rmin intersect -> must be rmax intersect |
---|
| 1359 | { |
---|
| 1360 | deltaR = t3 - fRMax*fRMax ; |
---|
| 1361 | c = deltaR/t1 ; |
---|
| 1362 | d2 = b*b-c; |
---|
[921] | 1363 | if( d2 >=0. ) |
---|
[831] | 1364 | { |
---|
| 1365 | sr = -b + std::sqrt(d2) ; |
---|
| 1366 | sider = kRMax ; |
---|
| 1367 | } |
---|
| 1368 | else // Case: On the border+t2<kRadTolerance |
---|
[921] | 1369 | // (v is perpendicular to the surface) |
---|
[831] | 1370 | { |
---|
| 1371 | if (calcNorm) |
---|
| 1372 | { |
---|
| 1373 | *n = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ; |
---|
| 1374 | *validNorm = true ; |
---|
| 1375 | } |
---|
| 1376 | return snxt = 0.0; |
---|
| 1377 | } |
---|
| 1378 | } |
---|
| 1379 | } |
---|
| 1380 | else if ( roi2 > fRMax*(fRMax + kRadTolerance) ) |
---|
| 1381 | // No rmin intersect -> must be rmax intersect |
---|
| 1382 | { |
---|
| 1383 | deltaR = t3 - fRMax*fRMax ; |
---|
| 1384 | b = t2/t1 ; |
---|
| 1385 | c = deltaR/t1; |
---|
| 1386 | d2 = b*b-c; |
---|
[921] | 1387 | if( d2 >= 0 ) |
---|
[831] | 1388 | { |
---|
| 1389 | sr = -b + std::sqrt(d2) ; |
---|
| 1390 | sider = kRMax ; |
---|
| 1391 | } |
---|
| 1392 | else // Case: On the border+t2<kRadTolerance |
---|
[921] | 1393 | // (v is perpendicular to the surface) |
---|
[831] | 1394 | { |
---|
| 1395 | if (calcNorm) |
---|
| 1396 | { |
---|
| 1397 | *n = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ; |
---|
| 1398 | *validNorm = true ; |
---|
| 1399 | } |
---|
| 1400 | return snxt = 0.0; |
---|
| 1401 | } |
---|
| 1402 | } |
---|
| 1403 | } |
---|
| 1404 | |
---|
| 1405 | // Phi Intersection |
---|
| 1406 | |
---|
[921] | 1407 | if ( !fPhiFullTube ) |
---|
[831] | 1408 | { |
---|
| 1409 | // add angle calculation with correction |
---|
| 1410 | // of the difference in domain of atan2 and Sphi |
---|
| 1411 | // |
---|
| 1412 | vphi = std::atan2(v.y(),v.x()) ; |
---|
[921] | 1413 | |
---|
| 1414 | if ( vphi < fSPhi - halfAngTolerance ) { vphi += twopi; } |
---|
| 1415 | else if ( vphi > fSPhi + fDPhi + halfAngTolerance ) { vphi -= twopi; } |
---|
[831] | 1416 | |
---|
| 1417 | |
---|
| 1418 | if ( p.x() || p.y() ) // Check if on z axis (rho not needed later) |
---|
| 1419 | { |
---|
| 1420 | // pDist -ve when inside |
---|
| 1421 | |
---|
| 1422 | pDistS = p.x()*sinSPhi - p.y()*cosSPhi ; |
---|
| 1423 | pDistE = -p.x()*sinEPhi + p.y()*cosEPhi ; |
---|
| 1424 | |
---|
| 1425 | // Comp -ve when in direction of outwards normal |
---|
| 1426 | |
---|
| 1427 | compS = -sinSPhi*v.x() + cosSPhi*v.y() ; |
---|
| 1428 | compE = sinEPhi*v.x() - cosEPhi*v.y() ; |
---|
[921] | 1429 | |
---|
[831] | 1430 | sidephi = kNull; |
---|
| 1431 | |
---|
[921] | 1432 | if( ( (fDPhi <= pi) && ( (pDistS <= halfCarTolerance) |
---|
| 1433 | && (pDistE <= halfCarTolerance) ) ) |
---|
| 1434 | || ( (fDPhi > pi) && !((pDistS > halfCarTolerance) |
---|
| 1435 | && (pDistE > halfCarTolerance) ) ) ) |
---|
[831] | 1436 | { |
---|
| 1437 | // Inside both phi *full* planes |
---|
| 1438 | |
---|
| 1439 | if ( compS < 0 ) |
---|
| 1440 | { |
---|
| 1441 | sphi = pDistS/compS ; |
---|
| 1442 | |
---|
[921] | 1443 | if (sphi >= -halfCarTolerance) |
---|
[831] | 1444 | { |
---|
| 1445 | xi = p.x() + sphi*v.x() ; |
---|
| 1446 | yi = p.y() + sphi*v.y() ; |
---|
| 1447 | |
---|
| 1448 | // Check intersecting with correct half-plane |
---|
| 1449 | // (if not -> no intersect) |
---|
| 1450 | // |
---|
[921] | 1451 | if( (std::abs(xi)<=kCarTolerance)&&(std::abs(yi)<=kCarTolerance) ) |
---|
| 1452 | { |
---|
| 1453 | sidephi = kSPhi; |
---|
| 1454 | if (((fSPhi-halfAngTolerance)<=vphi) |
---|
| 1455 | &&((fSPhi+fDPhi+halfAngTolerance)>=vphi)) |
---|
[831] | 1456 | { |
---|
| 1457 | sphi = kInfinity; |
---|
| 1458 | } |
---|
| 1459 | } |
---|
[921] | 1460 | else if ( yi*cosCPhi-xi*sinCPhi >=0 ) |
---|
[831] | 1461 | { |
---|
| 1462 | sphi = kInfinity ; |
---|
| 1463 | } |
---|
| 1464 | else |
---|
| 1465 | { |
---|
| 1466 | sidephi = kSPhi ; |
---|
[921] | 1467 | if ( pDistS > -halfCarTolerance ) |
---|
[831] | 1468 | { |
---|
| 1469 | sphi = 0.0 ; // Leave by sphi immediately |
---|
| 1470 | } |
---|
| 1471 | } |
---|
| 1472 | } |
---|
| 1473 | else |
---|
| 1474 | { |
---|
| 1475 | sphi = kInfinity ; |
---|
| 1476 | } |
---|
| 1477 | } |
---|
| 1478 | else |
---|
| 1479 | { |
---|
| 1480 | sphi = kInfinity ; |
---|
| 1481 | } |
---|
| 1482 | |
---|
| 1483 | if ( compE < 0 ) |
---|
| 1484 | { |
---|
| 1485 | sphi2 = pDistE/compE ; |
---|
| 1486 | |
---|
| 1487 | // Only check further if < starting phi intersection |
---|
| 1488 | // |
---|
[921] | 1489 | if ( (sphi2 > -halfCarTolerance) && (sphi2 < sphi) ) |
---|
[831] | 1490 | { |
---|
| 1491 | xi = p.x() + sphi2*v.x() ; |
---|
| 1492 | yi = p.y() + sphi2*v.y() ; |
---|
| 1493 | |
---|
| 1494 | if ((std::abs(xi)<=kCarTolerance)&&(std::abs(yi)<=kCarTolerance)) |
---|
| 1495 | { |
---|
| 1496 | // Leaving via ending phi |
---|
| 1497 | // |
---|
[921] | 1498 | if( !((fSPhi-halfAngTolerance <= vphi) |
---|
| 1499 | &&(fSPhi+fDPhi+halfAngTolerance >= vphi)) ) |
---|
[831] | 1500 | { |
---|
| 1501 | sidephi = kEPhi ; |
---|
[921] | 1502 | if ( pDistE <= -halfCarTolerance ) { sphi = sphi2 ; } |
---|
| 1503 | else { sphi = 0.0 ; } |
---|
[831] | 1504 | } |
---|
| 1505 | } |
---|
| 1506 | else // Check intersecting with correct half-plane |
---|
| 1507 | |
---|
| 1508 | if ( (yi*cosCPhi-xi*sinCPhi) >= 0) |
---|
| 1509 | { |
---|
| 1510 | // Leaving via ending phi |
---|
| 1511 | // |
---|
| 1512 | sidephi = kEPhi ; |
---|
[921] | 1513 | if ( pDistE <= -halfCarTolerance ) { sphi = sphi2 ; } |
---|
| 1514 | else { sphi = 0.0 ; } |
---|
[831] | 1515 | } |
---|
| 1516 | } |
---|
| 1517 | } |
---|
| 1518 | } |
---|
| 1519 | else |
---|
| 1520 | { |
---|
| 1521 | sphi = kInfinity ; |
---|
| 1522 | } |
---|
| 1523 | } |
---|
| 1524 | else |
---|
| 1525 | { |
---|
| 1526 | // On z axis + travel not || to z axis -> if phi of vector direction |
---|
| 1527 | // within phi of shape, Step limited by rmax, else Step =0 |
---|
| 1528 | |
---|
[921] | 1529 | if ( (fSPhi - halfAngTolerance <= vphi) |
---|
| 1530 | && (vphi <= fSPhi + fDPhi + halfAngTolerance ) ) |
---|
[831] | 1531 | { |
---|
| 1532 | sphi = kInfinity ; |
---|
| 1533 | } |
---|
| 1534 | else |
---|
| 1535 | { |
---|
| 1536 | sidephi = kSPhi ; // arbitrary |
---|
| 1537 | sphi = 0.0 ; |
---|
| 1538 | } |
---|
| 1539 | } |
---|
| 1540 | if (sphi < snxt) // Order intersecttions |
---|
| 1541 | { |
---|
| 1542 | snxt = sphi ; |
---|
| 1543 | side = sidephi ; |
---|
| 1544 | } |
---|
| 1545 | } |
---|
| 1546 | if (sr < snxt) // Order intersections |
---|
| 1547 | { |
---|
| 1548 | snxt = sr ; |
---|
| 1549 | side = sider ; |
---|
| 1550 | } |
---|
| 1551 | } |
---|
| 1552 | if (calcNorm) |
---|
| 1553 | { |
---|
| 1554 | switch(side) |
---|
| 1555 | { |
---|
| 1556 | case kRMax: |
---|
| 1557 | // Note: returned vector not normalised |
---|
| 1558 | // (divide by fRMax for unit vector) |
---|
| 1559 | // |
---|
| 1560 | xi = p.x() + snxt*v.x() ; |
---|
| 1561 | yi = p.y() + snxt*v.y() ; |
---|
| 1562 | *n = G4ThreeVector(xi/fRMax,yi/fRMax,0) ; |
---|
| 1563 | *validNorm = true ; |
---|
| 1564 | break ; |
---|
| 1565 | |
---|
| 1566 | case kRMin: |
---|
| 1567 | *validNorm = false ; // Rmin is inconvex |
---|
| 1568 | break ; |
---|
| 1569 | |
---|
| 1570 | case kSPhi: |
---|
| 1571 | if ( fDPhi <= pi ) |
---|
| 1572 | { |
---|
[921] | 1573 | *n = G4ThreeVector(sinSPhi,-cosSPhi,0) ; |
---|
[831] | 1574 | *validNorm = true ; |
---|
| 1575 | } |
---|
| 1576 | else |
---|
| 1577 | { |
---|
| 1578 | *validNorm = false ; |
---|
| 1579 | } |
---|
| 1580 | break ; |
---|
| 1581 | |
---|
| 1582 | case kEPhi: |
---|
| 1583 | if (fDPhi <= pi) |
---|
| 1584 | { |
---|
[921] | 1585 | *n = G4ThreeVector(-sinEPhi,cosEPhi,0) ; |
---|
[831] | 1586 | *validNorm = true ; |
---|
| 1587 | } |
---|
| 1588 | else |
---|
| 1589 | { |
---|
| 1590 | *validNorm = false ; |
---|
| 1591 | } |
---|
| 1592 | break ; |
---|
| 1593 | |
---|
| 1594 | case kPZ: |
---|
[921] | 1595 | *n = G4ThreeVector(0,0,1) ; |
---|
| 1596 | *validNorm = true ; |
---|
[831] | 1597 | break ; |
---|
| 1598 | |
---|
| 1599 | case kMZ: |
---|
| 1600 | *n = G4ThreeVector(0,0,-1) ; |
---|
| 1601 | *validNorm = true ; |
---|
| 1602 | break ; |
---|
| 1603 | |
---|
| 1604 | default: |
---|
| 1605 | G4cout.precision(16) ; |
---|
| 1606 | G4cout << G4endl ; |
---|
| 1607 | DumpInfo(); |
---|
| 1608 | G4cout << "Position:" << G4endl << G4endl ; |
---|
| 1609 | G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl ; |
---|
| 1610 | G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl ; |
---|
| 1611 | G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl ; |
---|
| 1612 | G4cout << "Direction:" << G4endl << G4endl ; |
---|
| 1613 | G4cout << "v.x() = " << v.x() << G4endl ; |
---|
| 1614 | G4cout << "v.y() = " << v.y() << G4endl ; |
---|
| 1615 | G4cout << "v.z() = " << v.z() << G4endl << G4endl ; |
---|
| 1616 | G4cout << "Proposed distance :" << G4endl << G4endl ; |
---|
| 1617 | G4cout << "snxt = " << snxt/mm << " mm" << G4endl << G4endl ; |
---|
| 1618 | G4Exception("G4Tubs::DistanceToOut(p,v,..)","Notification",JustWarning, |
---|
| 1619 | "Undefined side for valid surface normal to solid."); |
---|
| 1620 | break ; |
---|
| 1621 | } |
---|
| 1622 | } |
---|
[921] | 1623 | if ( snxt<halfCarTolerance ) { snxt=0 ; } |
---|
[831] | 1624 | |
---|
| 1625 | return snxt ; |
---|
| 1626 | } |
---|
| 1627 | |
---|
| 1628 | ////////////////////////////////////////////////////////////////////////// |
---|
| 1629 | // |
---|
| 1630 | // Calculate distance (<=actual) to closest surface of shape from inside |
---|
| 1631 | |
---|
| 1632 | G4double G4Tubs::DistanceToOut( const G4ThreeVector& p ) const |
---|
| 1633 | { |
---|
[921] | 1634 | G4double safe=0.0, rho, safeR1, safeR2, safeZ, safePhi ; |
---|
[831] | 1635 | rho = std::sqrt(p.x()*p.x() + p.y()*p.y()) ; |
---|
| 1636 | |
---|
| 1637 | #ifdef G4CSGDEBUG |
---|
| 1638 | if( Inside(p) == kOutside ) |
---|
| 1639 | { |
---|
| 1640 | G4cout.precision(16) ; |
---|
| 1641 | G4cout << G4endl ; |
---|
| 1642 | DumpInfo(); |
---|
| 1643 | G4cout << "Position:" << G4endl << G4endl ; |
---|
| 1644 | G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl ; |
---|
| 1645 | G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl ; |
---|
| 1646 | G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl ; |
---|
| 1647 | G4Exception("G4Tubs::DistanceToOut(p)", "Notification", JustWarning, |
---|
| 1648 | "Point p is outside !?"); |
---|
| 1649 | } |
---|
| 1650 | #endif |
---|
| 1651 | |
---|
| 1652 | if ( fRMin ) |
---|
| 1653 | { |
---|
| 1654 | safeR1 = rho - fRMin ; |
---|
| 1655 | safeR2 = fRMax - rho ; |
---|
| 1656 | |
---|
| 1657 | if ( safeR1 < safeR2 ) { safe = safeR1 ; } |
---|
| 1658 | else { safe = safeR2 ; } |
---|
| 1659 | } |
---|
| 1660 | else |
---|
| 1661 | { |
---|
| 1662 | safe = fRMax - rho ; |
---|
| 1663 | } |
---|
| 1664 | safeZ = fDz - std::fabs(p.z()) ; |
---|
| 1665 | |
---|
| 1666 | if ( safeZ < safe ) { safe = safeZ ; } |
---|
| 1667 | |
---|
| 1668 | // Check if phi divided, Calc distances closest phi plane |
---|
| 1669 | // |
---|
[921] | 1670 | if ( !fPhiFullTube ) |
---|
[831] | 1671 | { |
---|
[921] | 1672 | if ( p.y()*cosCPhi-p.x()*sinCPhi <= 0 ) |
---|
[831] | 1673 | { |
---|
[921] | 1674 | safePhi = -(p.x()*sinSPhi - p.y()*cosSPhi) ; |
---|
[831] | 1675 | } |
---|
| 1676 | else |
---|
| 1677 | { |
---|
[921] | 1678 | safePhi = (p.x()*sinEPhi - p.y()*cosEPhi) ; |
---|
[831] | 1679 | } |
---|
| 1680 | if (safePhi < safe) { safe = safePhi ; } |
---|
| 1681 | } |
---|
| 1682 | if ( safe < 0 ) { safe = 0 ; } |
---|
| 1683 | |
---|
| 1684 | return safe ; |
---|
| 1685 | } |
---|
| 1686 | |
---|
| 1687 | ///////////////////////////////////////////////////////////////////////// |
---|
| 1688 | // |
---|
| 1689 | // Create a List containing the transformed vertices |
---|
| 1690 | // Ordering [0-3] -fDz cross section |
---|
| 1691 | // [4-7] +fDz cross section such that [0] is below [4], |
---|
| 1692 | // [1] below [5] etc. |
---|
| 1693 | // Note: |
---|
| 1694 | // Caller has deletion resposibility |
---|
| 1695 | // Potential improvement: For last slice, use actual ending angle |
---|
| 1696 | // to avoid rounding error problems. |
---|
| 1697 | |
---|
| 1698 | G4ThreeVectorList* |
---|
| 1699 | G4Tubs::CreateRotatedVertices( const G4AffineTransform& pTransform ) const |
---|
| 1700 | { |
---|
| 1701 | G4ThreeVectorList* vertices ; |
---|
| 1702 | G4ThreeVector vertex0, vertex1, vertex2, vertex3 ; |
---|
| 1703 | G4double meshAngle, meshRMax, crossAngle, |
---|
| 1704 | cosCrossAngle, sinCrossAngle, sAngle; |
---|
| 1705 | G4double rMaxX, rMaxY, rMinX, rMinY, meshRMin ; |
---|
| 1706 | G4int crossSection, noCrossSections; |
---|
| 1707 | |
---|
| 1708 | // Compute no of cross-sections necessary to mesh tube |
---|
| 1709 | // |
---|
| 1710 | noCrossSections = G4int(fDPhi/kMeshAngleDefault) + 1 ; |
---|
| 1711 | |
---|
| 1712 | if ( noCrossSections < kMinMeshSections ) |
---|
| 1713 | { |
---|
| 1714 | noCrossSections = kMinMeshSections ; |
---|
| 1715 | } |
---|
| 1716 | else if (noCrossSections>kMaxMeshSections) |
---|
| 1717 | { |
---|
| 1718 | noCrossSections = kMaxMeshSections ; |
---|
| 1719 | } |
---|
| 1720 | // noCrossSections = 4 ; |
---|
| 1721 | |
---|
| 1722 | meshAngle = fDPhi/(noCrossSections - 1) ; |
---|
| 1723 | // meshAngle = fDPhi/(noCrossSections) ; |
---|
| 1724 | |
---|
| 1725 | meshRMax = (fRMax+100*kCarTolerance)/std::cos(meshAngle*0.5) ; |
---|
| 1726 | meshRMin = fRMin - 100*kCarTolerance ; |
---|
| 1727 | |
---|
| 1728 | // If complete in phi, set start angle such that mesh will be at fRMax |
---|
| 1729 | // on the x axis. Will give better extent calculations when not rotated. |
---|
| 1730 | |
---|
[921] | 1731 | if (fPhiFullTube && (fSPhi == 0) ) { sAngle = -meshAngle*0.5 ; } |
---|
| 1732 | else { sAngle = fSPhi ; } |
---|
[831] | 1733 | |
---|
| 1734 | vertices = new G4ThreeVectorList(); |
---|
| 1735 | vertices->reserve(noCrossSections*4); |
---|
| 1736 | |
---|
| 1737 | if ( vertices ) |
---|
| 1738 | { |
---|
| 1739 | for (crossSection = 0 ; crossSection < noCrossSections ; crossSection++ ) |
---|
| 1740 | { |
---|
| 1741 | // Compute coordinates of cross section at section crossSection |
---|
| 1742 | |
---|
| 1743 | crossAngle = sAngle + crossSection*meshAngle ; |
---|
| 1744 | cosCrossAngle = std::cos(crossAngle) ; |
---|
| 1745 | sinCrossAngle = std::sin(crossAngle) ; |
---|
| 1746 | |
---|
| 1747 | rMaxX = meshRMax*cosCrossAngle ; |
---|
| 1748 | rMaxY = meshRMax*sinCrossAngle ; |
---|
| 1749 | |
---|
| 1750 | if(meshRMin <= 0.0) |
---|
| 1751 | { |
---|
| 1752 | rMinX = 0.0 ; |
---|
| 1753 | rMinY = 0.0 ; |
---|
| 1754 | } |
---|
| 1755 | else |
---|
| 1756 | { |
---|
| 1757 | rMinX = meshRMin*cosCrossAngle ; |
---|
| 1758 | rMinY = meshRMin*sinCrossAngle ; |
---|
| 1759 | } |
---|
| 1760 | vertex0 = G4ThreeVector(rMinX,rMinY,-fDz) ; |
---|
| 1761 | vertex1 = G4ThreeVector(rMaxX,rMaxY,-fDz) ; |
---|
| 1762 | vertex2 = G4ThreeVector(rMaxX,rMaxY,+fDz) ; |
---|
| 1763 | vertex3 = G4ThreeVector(rMinX,rMinY,+fDz) ; |
---|
| 1764 | |
---|
| 1765 | vertices->push_back(pTransform.TransformPoint(vertex0)) ; |
---|
| 1766 | vertices->push_back(pTransform.TransformPoint(vertex1)) ; |
---|
| 1767 | vertices->push_back(pTransform.TransformPoint(vertex2)) ; |
---|
| 1768 | vertices->push_back(pTransform.TransformPoint(vertex3)) ; |
---|
| 1769 | } |
---|
| 1770 | } |
---|
| 1771 | else |
---|
| 1772 | { |
---|
| 1773 | DumpInfo(); |
---|
| 1774 | G4Exception("G4Tubs::CreateRotatedVertices()", |
---|
| 1775 | "FatalError", FatalException, |
---|
| 1776 | "Error in allocation of vertices. Out of memory !"); |
---|
| 1777 | } |
---|
| 1778 | return vertices ; |
---|
| 1779 | } |
---|
| 1780 | |
---|
| 1781 | ////////////////////////////////////////////////////////////////////////// |
---|
| 1782 | // |
---|
| 1783 | // Stream object contents to an output stream |
---|
| 1784 | |
---|
| 1785 | G4GeometryType G4Tubs::GetEntityType() const |
---|
| 1786 | { |
---|
| 1787 | return G4String("G4Tubs"); |
---|
| 1788 | } |
---|
| 1789 | |
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| 1790 | ////////////////////////////////////////////////////////////////////////// |
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| 1791 | // |
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| 1792 | // Stream object contents to an output stream |
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| 1793 | |
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| 1794 | std::ostream& G4Tubs::StreamInfo( std::ostream& os ) const |
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| 1795 | { |
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| 1796 | os << "-----------------------------------------------------------\n" |
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| 1797 | << " *** Dump for solid - " << GetName() << " ***\n" |
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| 1798 | << " ===================================================\n" |
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| 1799 | << " Solid type: G4Tubs\n" |
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| 1800 | << " Parameters: \n" |
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| 1801 | << " inner radius : " << fRMin/mm << " mm \n" |
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| 1802 | << " outer radius : " << fRMax/mm << " mm \n" |
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| 1803 | << " half length Z: " << fDz/mm << " mm \n" |
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| 1804 | << " starting phi : " << fSPhi/degree << " degrees \n" |
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| 1805 | << " delta phi : " << fDPhi/degree << " degrees \n" |
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| 1806 | << "-----------------------------------------------------------\n"; |
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| 1807 | |
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| 1808 | return os; |
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| 1809 | } |
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| 1810 | |
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| 1811 | ///////////////////////////////////////////////////////////////////////// |
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| 1812 | // |
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| 1813 | // GetPointOnSurface |
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| 1814 | |
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| 1815 | G4ThreeVector G4Tubs::GetPointOnSurface() const |
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| 1816 | { |
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| 1817 | G4double xRand, yRand, zRand, phi, cosphi, sinphi, chose, |
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| 1818 | aOne, aTwo, aThr, aFou; |
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| 1819 | G4double rRand; |
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| 1820 | |
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| 1821 | aOne = 2.*fDz*fDPhi*fRMax; |
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| 1822 | aTwo = 2.*fDz*fDPhi*fRMin; |
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| 1823 | aThr = 0.5*fDPhi*(fRMax*fRMax-fRMin*fRMin); |
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| 1824 | aFou = 2.*fDz*(fRMax-fRMin); |
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| 1825 | |
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| 1826 | phi = RandFlat::shoot(fSPhi, fSPhi+fDPhi); |
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| 1827 | cosphi = std::cos(phi); |
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| 1828 | sinphi = std::sin(phi); |
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| 1829 | |
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| 1830 | rRand = RandFlat::shoot(fRMin,fRMax); |
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| 1831 | |
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| 1832 | if( (fSPhi == 0) && (fDPhi == twopi) ) { aFou = 0; } |
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| 1833 | |
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| 1834 | chose = RandFlat::shoot(0.,aOne+aTwo+2.*aThr+2.*aFou); |
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| 1835 | |
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| 1836 | if( (chose >=0) && (chose < aOne) ) |
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| 1837 | { |
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| 1838 | xRand = fRMax*cosphi; |
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| 1839 | yRand = fRMax*sinphi; |
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| 1840 | zRand = RandFlat::shoot(-1.*fDz,fDz); |
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| 1841 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1842 | } |
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| 1843 | else if( (chose >= aOne) && (chose < aOne + aTwo) ) |
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| 1844 | { |
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| 1845 | xRand = fRMin*cosphi; |
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| 1846 | yRand = fRMin*sinphi; |
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| 1847 | zRand = RandFlat::shoot(-1.*fDz,fDz); |
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| 1848 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1849 | } |
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| 1850 | else if( (chose >= aOne + aTwo) && (chose < aOne + aTwo + aThr) ) |
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| 1851 | { |
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| 1852 | xRand = rRand*cosphi; |
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| 1853 | yRand = rRand*sinphi; |
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| 1854 | zRand = fDz; |
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| 1855 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1856 | } |
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| 1857 | else if( (chose >= aOne + aTwo + aThr) && (chose < aOne + aTwo + 2.*aThr) ) |
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| 1858 | { |
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| 1859 | xRand = rRand*cosphi; |
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| 1860 | yRand = rRand*sinphi; |
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| 1861 | zRand = -1.*fDz; |
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| 1862 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1863 | } |
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| 1864 | else if( (chose >= aOne + aTwo + 2.*aThr) |
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| 1865 | && (chose < aOne + aTwo + 2.*aThr + aFou) ) |
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| 1866 | { |
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| 1867 | xRand = rRand*std::cos(fSPhi); |
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| 1868 | yRand = rRand*std::sin(fSPhi); |
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| 1869 | zRand = RandFlat::shoot(-1.*fDz,fDz); |
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| 1870 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1871 | } |
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| 1872 | else |
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| 1873 | { |
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| 1874 | xRand = rRand*std::cos(fSPhi+fDPhi); |
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| 1875 | yRand = rRand*std::sin(fSPhi+fDPhi); |
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| 1876 | zRand = RandFlat::shoot(-1.*fDz,fDz); |
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| 1877 | return G4ThreeVector (xRand, yRand, zRand); |
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| 1878 | } |
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| 1879 | } |
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| 1880 | |
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| 1881 | /////////////////////////////////////////////////////////////////////////// |
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| 1882 | // |
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| 1883 | // Methods for visualisation |
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| 1884 | |
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| 1885 | void G4Tubs::DescribeYourselfTo ( G4VGraphicsScene& scene ) const |
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| 1886 | { |
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| 1887 | scene.AddSolid (*this) ; |
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| 1888 | } |
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| 1889 | |
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| 1890 | G4Polyhedron* G4Tubs::CreatePolyhedron () const |
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| 1891 | { |
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| 1892 | return new G4PolyhedronTubs (fRMin, fRMax, fDz, fSPhi, fDPhi) ; |
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| 1893 | } |
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| 1894 | |
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| 1895 | G4NURBS* G4Tubs::CreateNURBS () const |
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| 1896 | { |
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| 1897 | G4NURBS* pNURBS ; |
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| 1898 | if (fRMin != 0) |
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| 1899 | { |
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[921] | 1900 | if (fPhiFullTube) |
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[831] | 1901 | { |
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| 1902 | pNURBS = new G4NURBStube (fRMin,fRMax,fDz) ; |
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| 1903 | } |
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| 1904 | else |
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| 1905 | { |
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| 1906 | pNURBS = new G4NURBStubesector (fRMin,fRMax,fDz,fSPhi,fSPhi+fDPhi) ; |
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| 1907 | } |
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| 1908 | } |
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| 1909 | else |
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| 1910 | { |
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[921] | 1911 | if (fPhiFullTube) |
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[831] | 1912 | { |
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| 1913 | pNURBS = new G4NURBScylinder (fRMax,fDz) ; |
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| 1914 | } |
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| 1915 | else |
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| 1916 | { |
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| 1917 | const G4double epsilon = 1.e-4 ; // Cylinder sector not yet available! |
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| 1918 | pNURBS = new G4NURBStubesector (epsilon,fRMax,fDz,fSPhi,fSPhi+fDPhi) ; |
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| 1919 | } |
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| 1920 | } |
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| 1921 | return pNURBS ; |
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| 1922 | } |
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