[831] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4Box.cc,v 1.44 2006/10/19 15:33:37 gcosmo Exp $ |
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[850] | 28 | // GEANT4 tag $Name: HEAD $ |
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[831] | 29 | // |
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| 30 | // |
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| 31 | // |
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| 32 | // Implementation for G4Box class |
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| 33 | // |
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| 34 | // 24.06.98 - V. Grichine: insideEdge in DistanceToIn(p,v) |
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| 35 | // 20.09.98 - V.Grichine: new algorithm of DistanceToIn(p,v) |
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| 36 | // 07.05.00 - V.Grichine: d= DistanceToIn(p,v), if d<e/2, d=0 |
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| 37 | // 09.06.00 - V.Grichine: safety in DistanceToIn(p) against Inside(p)=kOutside |
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| 38 | // and information before exception in DistanceToOut(p,v,...) |
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| 39 | // 15.11.00 - D.Williams, V.Grichine: bug fixed in CalculateExtent - change |
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| 40 | // algorithm for rotated vertices |
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| 41 | // -------------------------------------------------------------------- |
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| 42 | |
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| 43 | #include "G4Box.hh" |
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| 44 | |
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| 45 | #include "G4VoxelLimits.hh" |
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| 46 | #include "G4AffineTransform.hh" |
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| 47 | #include "Randomize.hh" |
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| 48 | |
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| 49 | #include "G4VPVParameterisation.hh" |
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| 50 | |
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| 51 | #include "G4VGraphicsScene.hh" |
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| 52 | #include "G4Polyhedron.hh" |
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| 53 | #include "G4NURBS.hh" |
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| 54 | #include "G4NURBSbox.hh" |
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| 55 | #include "G4VisExtent.hh" |
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| 56 | |
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| 57 | //////////////////////////////////////////////////////////////////////// |
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| 58 | // |
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| 59 | // Constructor - check & set half widths |
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| 60 | |
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| 61 | G4Box::G4Box(const G4String& pName, |
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| 62 | G4double pX, |
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| 63 | G4double pY, |
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| 64 | G4double pZ) |
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| 65 | : G4CSGSolid(pName) |
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| 66 | { |
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| 67 | if ( (pX > 2*kCarTolerance) |
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| 68 | && (pY > 2*kCarTolerance) |
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| 69 | && (pZ > 2*kCarTolerance) ) |
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| 70 | { |
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| 71 | fDx = pX ; |
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| 72 | fDy = pY ; |
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| 73 | fDz = pZ ; |
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| 74 | } |
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| 75 | else |
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| 76 | { |
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| 77 | G4cerr << "ERROR - G4Box()::G4Box(): " << GetName() << G4endl |
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| 78 | << " Dimensions too small ! - " |
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| 79 | << pX << ", " << pY << ", " << pZ << G4endl; |
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| 80 | G4Exception("G4Box::G4Box()", "InvalidSetup", |
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| 81 | FatalException, "Invalid dimensions. Too small."); |
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| 82 | } |
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| 83 | } |
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| 84 | |
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| 85 | ////////////////////////////////////////////////////////////////////////// |
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| 86 | // |
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| 87 | // Fake default constructor - sets only member data and allocates memory |
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| 88 | // for usage restricted to object persistency. |
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| 89 | |
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| 90 | G4Box::G4Box( __void__& a ) |
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| 91 | : G4CSGSolid(a) |
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| 92 | { |
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| 93 | } |
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| 94 | |
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| 95 | ////////////////////////////////////////////////////////////////////////// |
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| 96 | // |
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| 97 | // Destructor |
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| 98 | |
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| 99 | G4Box::~G4Box() |
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| 100 | { |
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| 101 | } |
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| 102 | |
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| 103 | ////////////////////////////////////////////////////////////////////////////// |
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| 104 | |
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| 105 | void G4Box::SetXHalfLength(G4double dx) |
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| 106 | { |
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| 107 | if(dx > 2*kCarTolerance) |
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| 108 | fDx = dx; |
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| 109 | else |
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| 110 | { |
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| 111 | G4cerr << "ERROR - G4Box()::SetXHalfLength(): " << GetName() << G4endl |
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| 112 | << " Dimension X too small ! - " |
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| 113 | << dx << G4endl; |
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| 114 | G4Exception("G4Box::SetXHalfLength()", "InvalidSetup", |
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| 115 | FatalException, "Invalid dimensions. Too small."); |
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| 116 | } |
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| 117 | fCubicVolume= 0.; |
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| 118 | fSurfaceArea= 0.; |
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| 119 | fpPolyhedron = 0; |
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| 120 | } |
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| 121 | |
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| 122 | void G4Box::SetYHalfLength(G4double dy) |
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| 123 | { |
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| 124 | if(dy > 2*kCarTolerance) |
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| 125 | fDy = dy; |
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| 126 | else |
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| 127 | { |
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| 128 | G4cerr << "ERROR - G4Box()::SetYHalfLength(): " << GetName() << G4endl |
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| 129 | << " Dimension Y too small ! - " |
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| 130 | << dy << G4endl; |
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| 131 | G4Exception("G4Box::SetYHalfLength()", "InvalidSetup", |
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| 132 | FatalException, "Invalid dimensions. Too small."); |
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| 133 | } |
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| 134 | fCubicVolume= 0.; |
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| 135 | fSurfaceArea= 0.; |
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| 136 | fpPolyhedron = 0; |
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| 137 | } |
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| 138 | |
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| 139 | void G4Box::SetZHalfLength(G4double dz) |
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| 140 | { |
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| 141 | if(dz > 2*kCarTolerance) |
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| 142 | fDz = dz; |
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| 143 | else |
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| 144 | { |
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| 145 | G4cerr << "ERROR - G4Box()::SetZHalfLength(): " << GetName() << G4endl |
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| 146 | << " Dimension Z too small ! - " |
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| 147 | << dz << G4endl; |
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| 148 | G4Exception("G4Box::SetZHalfLength()", "InvalidSetup", |
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| 149 | FatalException, "Invalid dimensions. Too small."); |
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| 150 | } |
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| 151 | fCubicVolume= 0.; |
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| 152 | fSurfaceArea= 0.; |
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| 153 | fpPolyhedron = 0; |
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| 154 | } |
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| 155 | |
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| 156 | |
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| 157 | |
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| 158 | //////////////////////////////////////////////////////////////////////// |
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| 159 | // |
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| 160 | // Dispatch to parameterisation for replication mechanism dimension |
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| 161 | // computation & modification. |
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| 162 | |
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| 163 | void G4Box::ComputeDimensions(G4VPVParameterisation* p, |
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| 164 | const G4int n, |
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| 165 | const G4VPhysicalVolume* pRep) |
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| 166 | { |
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| 167 | p->ComputeDimensions(*this,n,pRep); |
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| 168 | } |
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| 169 | |
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| 170 | ////////////////////////////////////////////////////////////////////////// |
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| 171 | // |
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| 172 | // Calculate extent under transform and specified limit |
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| 173 | |
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| 174 | G4bool G4Box::CalculateExtent(const EAxis pAxis, |
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| 175 | const G4VoxelLimits& pVoxelLimit, |
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| 176 | const G4AffineTransform& pTransform, |
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| 177 | G4double& pMin, G4double& pMax) const |
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| 178 | { |
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| 179 | if (!pTransform.IsRotated()) |
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| 180 | { |
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| 181 | // Special case handling for unrotated boxes |
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| 182 | // Compute x/y/z mins and maxs respecting limits, with early returns |
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| 183 | // if outside limits. Then switch() on pAxis |
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| 184 | |
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| 185 | G4double xoffset,xMin,xMax; |
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| 186 | G4double yoffset,yMin,yMax; |
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| 187 | G4double zoffset,zMin,zMax; |
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| 188 | |
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| 189 | xoffset = pTransform.NetTranslation().x() ; |
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| 190 | xMin = xoffset - fDx ; |
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| 191 | xMax = xoffset + fDx ; |
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| 192 | |
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| 193 | if (pVoxelLimit.IsXLimited()) |
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| 194 | { |
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| 195 | if ( xMin > pVoxelLimit.GetMaxXExtent()+kCarTolerance || |
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| 196 | xMax < pVoxelLimit.GetMinXExtent()-kCarTolerance ) return false ; |
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| 197 | else |
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| 198 | { |
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| 199 | if (xMin < pVoxelLimit.GetMinXExtent()) |
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| 200 | { |
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| 201 | xMin = pVoxelLimit.GetMinXExtent() ; |
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| 202 | } |
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| 203 | if (xMax > pVoxelLimit.GetMaxXExtent()) |
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| 204 | { |
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| 205 | xMax = pVoxelLimit.GetMaxXExtent() ; |
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| 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | yoffset = pTransform.NetTranslation().y() ; |
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| 210 | yMin = yoffset - fDy ; |
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| 211 | yMax = yoffset + fDy ; |
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| 212 | |
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| 213 | if (pVoxelLimit.IsYLimited()) |
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| 214 | { |
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| 215 | if ( yMin > pVoxelLimit.GetMaxYExtent()+kCarTolerance || |
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| 216 | yMax < pVoxelLimit.GetMinYExtent()-kCarTolerance ) return false ; |
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| 217 | else |
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| 218 | { |
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| 219 | if (yMin < pVoxelLimit.GetMinYExtent()) |
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| 220 | { |
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| 221 | yMin = pVoxelLimit.GetMinYExtent() ; |
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| 222 | } |
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| 223 | if (yMax > pVoxelLimit.GetMaxYExtent()) |
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| 224 | { |
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| 225 | yMax = pVoxelLimit.GetMaxYExtent() ; |
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| 226 | } |
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| 227 | } |
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| 228 | } |
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| 229 | zoffset = pTransform.NetTranslation().z() ; |
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| 230 | zMin = zoffset - fDz ; |
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| 231 | zMax = zoffset + fDz ; |
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| 232 | |
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| 233 | if (pVoxelLimit.IsZLimited()) |
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| 234 | { |
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| 235 | if ( zMin > pVoxelLimit.GetMaxZExtent()+kCarTolerance || |
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| 236 | zMax < pVoxelLimit.GetMinZExtent()-kCarTolerance ) return false ; |
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| 237 | else |
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| 238 | { |
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| 239 | if (zMin < pVoxelLimit.GetMinZExtent()) |
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| 240 | { |
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| 241 | zMin = pVoxelLimit.GetMinZExtent() ; |
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| 242 | } |
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| 243 | if (zMax > pVoxelLimit.GetMaxZExtent()) |
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| 244 | { |
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| 245 | zMax = pVoxelLimit.GetMaxZExtent() ; |
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| 246 | } |
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| 247 | } |
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| 248 | } |
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| 249 | switch (pAxis) |
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| 250 | { |
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| 251 | case kXAxis: |
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| 252 | pMin = xMin ; |
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| 253 | pMax = xMax ; |
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| 254 | break ; |
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| 255 | case kYAxis: |
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| 256 | pMin=yMin; |
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| 257 | pMax=yMax; |
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| 258 | break; |
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| 259 | case kZAxis: |
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| 260 | pMin=zMin; |
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| 261 | pMax=zMax; |
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| 262 | break; |
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| 263 | default: |
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| 264 | break; |
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| 265 | } |
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| 266 | pMin -= kCarTolerance ; |
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| 267 | pMax += kCarTolerance ; |
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| 268 | |
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| 269 | return true; |
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| 270 | } |
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| 271 | else // General rotated case - create and clip mesh to boundaries |
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| 272 | { |
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| 273 | G4bool existsAfterClip = false ; |
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| 274 | G4ThreeVectorList* vertices ; |
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| 275 | |
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| 276 | pMin = +kInfinity ; |
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| 277 | pMax = -kInfinity ; |
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| 278 | |
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| 279 | // Calculate rotated vertex coordinates |
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| 280 | |
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| 281 | vertices = CreateRotatedVertices(pTransform) ; |
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| 282 | ClipCrossSection(vertices,0,pVoxelLimit,pAxis,pMin,pMax) ; |
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| 283 | ClipCrossSection(vertices,4,pVoxelLimit,pAxis,pMin,pMax) ; |
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| 284 | ClipBetweenSections(vertices,0,pVoxelLimit,pAxis,pMin,pMax) ; |
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| 285 | |
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| 286 | if (pVoxelLimit.IsLimited(pAxis) == false) |
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| 287 | { |
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| 288 | if ( pMin != kInfinity || pMax != -kInfinity ) |
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| 289 | { |
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| 290 | existsAfterClip = true ; |
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| 291 | |
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| 292 | // Add 2*tolerance to avoid precision troubles |
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| 293 | |
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| 294 | pMin -= kCarTolerance; |
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| 295 | pMax += kCarTolerance; |
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| 296 | } |
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| 297 | } |
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| 298 | else |
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| 299 | { |
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| 300 | G4ThreeVector clipCentre( |
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| 301 | ( pVoxelLimit.GetMinXExtent()+pVoxelLimit.GetMaxXExtent())*0.5, |
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| 302 | ( pVoxelLimit.GetMinYExtent()+pVoxelLimit.GetMaxYExtent())*0.5, |
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| 303 | ( pVoxelLimit.GetMinZExtent()+pVoxelLimit.GetMaxZExtent())*0.5); |
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| 304 | |
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| 305 | if ( pMin != kInfinity || pMax != -kInfinity ) |
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| 306 | { |
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| 307 | existsAfterClip = true ; |
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| 308 | |
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| 309 | |
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| 310 | // Check to see if endpoints are in the solid |
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| 311 | |
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| 312 | clipCentre(pAxis) = pVoxelLimit.GetMinExtent(pAxis); |
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| 313 | |
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| 314 | if (Inside(pTransform.Inverse().TransformPoint(clipCentre)) != kOutside) |
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| 315 | { |
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| 316 | pMin = pVoxelLimit.GetMinExtent(pAxis); |
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| 317 | } |
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| 318 | else |
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| 319 | { |
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| 320 | pMin -= kCarTolerance; |
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| 321 | } |
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| 322 | clipCentre(pAxis) = pVoxelLimit.GetMaxExtent(pAxis); |
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| 323 | |
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| 324 | if (Inside(pTransform.Inverse().TransformPoint(clipCentre)) != kOutside) |
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| 325 | { |
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| 326 | pMax = pVoxelLimit.GetMaxExtent(pAxis); |
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| 327 | } |
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| 328 | else |
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| 329 | { |
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| 330 | pMax += kCarTolerance; |
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| 331 | } |
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| 332 | } |
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| 333 | |
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| 334 | // Check for case where completely enveloping clipping volume |
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| 335 | // If point inside then we are confident that the solid completely |
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| 336 | // envelopes the clipping volume. Hence set min/max extents according |
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| 337 | // to clipping volume extents along the specified axis. |
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| 338 | |
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| 339 | else if (Inside(pTransform.Inverse().TransformPoint(clipCentre)) |
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| 340 | != kOutside) |
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| 341 | { |
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| 342 | existsAfterClip = true ; |
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| 343 | pMin = pVoxelLimit.GetMinExtent(pAxis) ; |
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| 344 | pMax = pVoxelLimit.GetMaxExtent(pAxis) ; |
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| 345 | } |
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| 346 | } |
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| 347 | delete vertices; |
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| 348 | return existsAfterClip; |
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| 349 | } |
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| 350 | } |
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| 351 | |
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| 352 | ///////////////////////////////////////////////////////////////////////// |
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| 353 | // |
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| 354 | // Return whether point inside/outside/on surface, using tolerance |
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| 355 | |
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| 356 | EInside G4Box::Inside(const G4ThreeVector& p) const |
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| 357 | { |
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| 358 | EInside in = kOutside ; |
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| 359 | |
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| 360 | if ( std::fabs(p.x()) <= fDx - kCarTolerance*0.5 ) |
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| 361 | { |
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| 362 | if (std::fabs(p.y()) <= fDy - kCarTolerance*0.5 ) |
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| 363 | { |
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| 364 | if (std::fabs(p.z()) <= fDz - kCarTolerance*0.5 ) in = kInside ; |
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| 365 | else if (std::fabs(p.z()) <= fDz + kCarTolerance*0.5 ) in = kSurface ; |
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| 366 | } |
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| 367 | else if (std::fabs(p.y()) <= fDy + kCarTolerance*0.5 ) |
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| 368 | { |
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| 369 | if (std::fabs(p.z()) <= fDz + kCarTolerance*0.5 ) in = kSurface ; |
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| 370 | } |
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| 371 | } |
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| 372 | else if (std::fabs(p.x()) <= fDx + kCarTolerance*0.5 ) |
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| 373 | { |
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| 374 | if (std::fabs(p.y()) <= fDy + kCarTolerance*0.5 ) |
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| 375 | { |
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| 376 | if (std::fabs(p.z()) <= fDz + kCarTolerance*0.5) in = kSurface ; |
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| 377 | } |
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| 378 | } |
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| 379 | return in ; |
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| 380 | } |
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| 381 | |
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| 382 | /////////////////////////////////////////////////////////////////////// |
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| 383 | // |
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| 384 | // Calculate side nearest to p, and return normal |
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| 385 | // If two sides are equidistant, normal of first side (x/y/z) |
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| 386 | // encountered returned |
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| 387 | |
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| 388 | G4ThreeVector G4Box::SurfaceNormal( const G4ThreeVector& p) const |
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| 389 | { |
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| 390 | G4double distx, disty, distz ; |
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| 391 | G4ThreeVector norm ; |
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| 392 | |
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| 393 | // Calculate distances as if in 1st octant |
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| 394 | |
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| 395 | distx = std::fabs(std::fabs(p.x()) - fDx) ; |
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| 396 | disty = std::fabs(std::fabs(p.y()) - fDy) ; |
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| 397 | distz = std::fabs(std::fabs(p.z()) - fDz) ; |
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| 398 | |
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| 399 | // New code for particle on surface including edges and corners with specific |
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| 400 | // normals |
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| 401 | |
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| 402 | const G4double delta = 0.5*kCarTolerance; |
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| 403 | const G4ThreeVector nX = G4ThreeVector( 1.0, 0,0 ); |
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| 404 | const G4ThreeVector nmX = G4ThreeVector(-1.0, 0,0 ); |
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| 405 | const G4ThreeVector nY = G4ThreeVector( 0, 1.0,0 ); |
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| 406 | const G4ThreeVector nmY = G4ThreeVector( 0,-1.0,0 ); |
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| 407 | const G4ThreeVector nZ = G4ThreeVector( 0, 0, 1.0); |
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| 408 | const G4ThreeVector nmZ = G4ThreeVector( 0, 0,- 1.0); |
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| 409 | |
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| 410 | G4ThreeVector normX(0.,0.,0.), normY(0.,0.,0.), normZ(0.,0.,0.); |
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| 411 | G4ThreeVector sumnorm(0., 0., 0.); |
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| 412 | G4int noSurfaces=0; |
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| 413 | |
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| 414 | if (distx <= delta) // on X/mX surface and around |
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| 415 | { |
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| 416 | noSurfaces ++; |
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| 417 | if ( p.x() >= 0.){ // on +X surface |
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| 418 | normX= nX ; // G4ThreeVector( 1.0, 0., 0. ); |
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| 419 | }else{ |
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| 420 | normX= nmX; // G4ThreeVector(-1.0, 0., 0. ); |
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| 421 | } |
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| 422 | sumnorm= normX; |
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| 423 | } |
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| 424 | |
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| 425 | if (disty <= delta) // on one of the +Y or -Y surfaces |
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| 426 | { |
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| 427 | noSurfaces ++; |
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| 428 | if ( p.y() >= 0.){ // on +Y surface |
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| 429 | normY= nY; |
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| 430 | }else{ |
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| 431 | normY = nmY; |
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| 432 | } |
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| 433 | sumnorm += normY; |
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| 434 | } |
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| 435 | |
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| 436 | if (distz <= delta) // on one of the +Z or -Z surfaces |
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| 437 | { |
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| 438 | noSurfaces ++; |
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| 439 | if ( p.z() >= 0.){ // on +Z surface |
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| 440 | normZ= nZ; |
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| 441 | }else{ |
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| 442 | normZ = nmZ; |
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| 443 | } |
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| 444 | sumnorm += normZ; |
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| 445 | } |
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| 446 | |
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| 447 | // sumnorm= normX + normY + normZ; |
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| 448 | const G4double invSqrt2 = 1.0 / std::sqrt( 2.0); |
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| 449 | const G4double invSqrt3 = 1.0 / std::sqrt( 3.0); |
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| 450 | |
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| 451 | norm= G4ThreeVector( 0., 0., 0.); |
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| 452 | if( noSurfaces > 0 ) |
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| 453 | { |
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| 454 | if( noSurfaces == 1 ){ |
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| 455 | norm= sumnorm; |
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| 456 | }else{ |
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| 457 | // norm = sumnorm . unit(); |
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| 458 | if( noSurfaces == 2 ) { |
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| 459 | // 2 surfaces -> on edge |
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| 460 | norm = invSqrt2 * sumnorm; |
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| 461 | } else { |
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| 462 | // 3 surfaces (on corner) |
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| 463 | norm = invSqrt3 * sumnorm; |
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| 464 | } |
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| 465 | } |
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| 466 | }else{ |
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| 467 | #ifdef G4CSGDEBUG |
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| 468 | G4Exception("G4Box::SurfaceNormal(p)", "Notification", JustWarning, |
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| 469 | "Point p is not on surface !?" ); |
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| 470 | #endif |
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| 471 | norm = ApproxSurfaceNormal(p); |
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| 472 | } |
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| 473 | |
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| 474 | return norm; |
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| 475 | } |
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| 476 | |
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| 477 | ////////////////////////////////////////////////////////////////////////// |
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| 478 | // |
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| 479 | // Algorithm for SurfaceNormal() following the original specification |
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| 480 | // for points not on the surface |
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| 481 | |
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| 482 | G4ThreeVector G4Box::ApproxSurfaceNormal( const G4ThreeVector& p ) const |
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| 483 | { |
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| 484 | G4double distx, disty, distz ; |
---|
| 485 | G4ThreeVector norm ; |
---|
| 486 | |
---|
| 487 | // Calculate distances as if in 1st octant |
---|
| 488 | |
---|
| 489 | distx = std::fabs(std::fabs(p.x()) - fDx) ; |
---|
| 490 | disty = std::fabs(std::fabs(p.y()) - fDy) ; |
---|
| 491 | distz = std::fabs(std::fabs(p.z()) - fDz) ; |
---|
| 492 | |
---|
| 493 | if ( distx <= disty ) |
---|
| 494 | { |
---|
| 495 | if ( distx <= distz ) // Closest to X |
---|
| 496 | { |
---|
| 497 | if ( p.x() < 0 ) norm = G4ThreeVector(-1.0,0,0) ; |
---|
| 498 | else norm = G4ThreeVector( 1.0,0,0) ; |
---|
| 499 | } |
---|
| 500 | else // Closest to Z |
---|
| 501 | { |
---|
| 502 | if ( p.z() < 0 ) norm = G4ThreeVector(0,0,-1.0) ; |
---|
| 503 | else norm = G4ThreeVector(0,0, 1.0) ; |
---|
| 504 | } |
---|
| 505 | } |
---|
| 506 | else |
---|
| 507 | { |
---|
| 508 | if ( disty <= distz ) // Closest to Y |
---|
| 509 | { |
---|
| 510 | if ( p.y() < 0 ) norm = G4ThreeVector(0,-1.0,0) ; |
---|
| 511 | else norm = G4ThreeVector(0, 1.0,0) ; |
---|
| 512 | } |
---|
| 513 | else // Closest to Z |
---|
| 514 | { |
---|
| 515 | if ( p.z() < 0 ) norm = G4ThreeVector(0,0,-1.0) ; |
---|
| 516 | else norm = G4ThreeVector(0,0, 1.0) ; |
---|
| 517 | } |
---|
| 518 | } |
---|
| 519 | return norm; |
---|
| 520 | } |
---|
| 521 | |
---|
| 522 | /////////////////////////////////////////////////////////////////////////// |
---|
| 523 | // |
---|
| 524 | // Calculate distance to box from an outside point |
---|
| 525 | // - return kInfinity if no intersection. |
---|
| 526 | // |
---|
| 527 | // ALGORITHM: |
---|
| 528 | // |
---|
| 529 | // Check that if point lies outside x/y/z extent of box, travel is towards |
---|
| 530 | // the box (ie. there is a possibility of an intersection) |
---|
| 531 | // |
---|
| 532 | // Calculate pairs of minimum and maximum distances for x/y/z travel for |
---|
| 533 | // intersection with the box's x/y/z extent. |
---|
| 534 | // If there is a valid intersection, it is given by the maximum min distance |
---|
| 535 | // (ie. distance to satisfy x/y/z intersections) *if* <= minimum max distance |
---|
| 536 | // (ie. distance after which 1+ of x/y/z intersections not satisfied) |
---|
| 537 | // |
---|
| 538 | // NOTE: |
---|
| 539 | // |
---|
| 540 | // `Inside' safe - meaningful answers given if point is inside the exact |
---|
| 541 | // shape. |
---|
| 542 | |
---|
| 543 | G4double G4Box::DistanceToIn(const G4ThreeVector& p,const G4ThreeVector& v) const |
---|
| 544 | { |
---|
| 545 | G4double safx, safy, safz ; |
---|
| 546 | G4double smin=0.0, sminy, sminz ; // , sminx ; |
---|
| 547 | G4double smax=kInfinity, smaxy, smaxz ; // , smaxx ; // they always > 0 |
---|
| 548 | G4double stmp ; |
---|
| 549 | G4double sOut=kInfinity, sOuty=kInfinity, sOutz=kInfinity ; |
---|
| 550 | |
---|
| 551 | safx = std::fabs(p.x()) - fDx ; // minimum distance to x surface of shape |
---|
| 552 | safy = std::fabs(p.y()) - fDy ; |
---|
| 553 | safz = std::fabs(p.z()) - fDz ; |
---|
| 554 | |
---|
| 555 | // Will we intersect? |
---|
| 556 | // If safx/y/z is >-tol/2 the point is outside/on the box's x/y/z extent. |
---|
| 557 | // If both p.x/y/z and v.x/y/z repectively are both positive/negative, |
---|
| 558 | // travel is in a direction away from the shape. |
---|
| 559 | |
---|
| 560 | if ( ((p.x()*v.x() >= 0.0) && safx > -kCarTolerance*0.5) |
---|
| 561 | || ((p.y()*v.y() >= 0.0) && safy > -kCarTolerance*0.5) |
---|
| 562 | || ((p.z()*v.z() >= 0.0) && safz > -kCarTolerance*0.5) ) |
---|
| 563 | { |
---|
| 564 | return kInfinity ; // travel away or parallel within tolerance |
---|
| 565 | } |
---|
| 566 | |
---|
| 567 | // Compute min / max distances for x/y/z travel: |
---|
| 568 | // X Planes |
---|
| 569 | |
---|
| 570 | if ( v.x()) |
---|
| 571 | { |
---|
| 572 | stmp = 1.0/std::fabs(v.x()) ; |
---|
| 573 | |
---|
| 574 | if (safx >= 0.0) |
---|
| 575 | { |
---|
| 576 | smin = safx*stmp ; |
---|
| 577 | smax = (fDx+std::fabs(p.x()))*stmp ; |
---|
| 578 | } |
---|
| 579 | else |
---|
| 580 | { |
---|
| 581 | if (v.x() > 0) sOut = (fDx - p.x())*stmp ; |
---|
| 582 | if (v.x() < 0) sOut = (fDx + p.x())*stmp ; |
---|
| 583 | } |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | // Y Planes |
---|
| 587 | |
---|
| 588 | if ( v.y()) |
---|
| 589 | { |
---|
| 590 | stmp = 1.0/std::fabs(v.y()) ; |
---|
| 591 | |
---|
| 592 | if (safy >= 0.0) |
---|
| 593 | { |
---|
| 594 | sminy = safy*stmp ; |
---|
| 595 | smaxy = (fDy+std::fabs(p.y()))*stmp ; |
---|
| 596 | |
---|
| 597 | if (sminy > smin) smin=sminy ; |
---|
| 598 | if (smaxy < smax) smax=smaxy ; |
---|
| 599 | |
---|
| 600 | if (smin >= smax-kCarTolerance*0.5) |
---|
| 601 | { |
---|
| 602 | return kInfinity ; // touch XY corner |
---|
| 603 | } |
---|
| 604 | } |
---|
| 605 | else |
---|
| 606 | { |
---|
| 607 | if (v.y() > 0) sOuty = (fDy - p.y())*stmp ; |
---|
| 608 | if (v.y() < 0) sOuty = (fDy + p.y())*stmp ; |
---|
| 609 | if( sOuty < sOut ) sOut = sOuty ; |
---|
| 610 | } |
---|
| 611 | } |
---|
| 612 | |
---|
| 613 | // Z planes |
---|
| 614 | |
---|
| 615 | if ( v.z() ) |
---|
| 616 | { |
---|
| 617 | stmp = 1.0/std::fabs(v.z()) ; |
---|
| 618 | |
---|
| 619 | if ( safz >= 0.0) |
---|
| 620 | { |
---|
| 621 | sminz = safz*stmp ; |
---|
| 622 | smaxz = (fDz+std::fabs(p.z()))*stmp ; |
---|
| 623 | |
---|
| 624 | if (sminz > smin) smin = sminz ; |
---|
| 625 | if (smaxz < smax) smax = smaxz ; |
---|
| 626 | |
---|
| 627 | if (smin >= smax-kCarTolerance*0.5) |
---|
| 628 | { |
---|
| 629 | return kInfinity ; // touch ZX or ZY corners |
---|
| 630 | } |
---|
| 631 | } |
---|
| 632 | else |
---|
| 633 | { |
---|
| 634 | if (v.z() > 0) sOutz = (fDz - p.z())*stmp ; |
---|
| 635 | if (v.z() < 0) sOutz = (fDz + p.z())*stmp ; |
---|
| 636 | if( sOutz < sOut ) sOut = sOutz ; |
---|
| 637 | } |
---|
| 638 | } |
---|
| 639 | |
---|
| 640 | if ( sOut <= smin + 0.5*kCarTolerance) // travel over edge |
---|
| 641 | { |
---|
| 642 | return kInfinity ; |
---|
| 643 | } |
---|
| 644 | if (smin < 0.5*kCarTolerance) smin = 0.0 ; |
---|
| 645 | |
---|
| 646 | return smin ; |
---|
| 647 | } |
---|
| 648 | |
---|
| 649 | ////////////////////////////////////////////////////////////////////////// |
---|
| 650 | // |
---|
| 651 | // Appoximate distance to box. |
---|
| 652 | // Returns largest perpendicular distance to the closest x/y/z sides of |
---|
| 653 | // the box, which is the most fast estimation of the shortest distance to box |
---|
| 654 | // - If inside return 0 |
---|
| 655 | |
---|
| 656 | G4double G4Box::DistanceToIn(const G4ThreeVector& p) const |
---|
| 657 | { |
---|
| 658 | G4double safex, safey, safez, safe = 0.0 ; |
---|
| 659 | |
---|
| 660 | safex = std::fabs(p.x()) - fDx ; |
---|
| 661 | safey = std::fabs(p.y()) - fDy ; |
---|
| 662 | safez = std::fabs(p.z()) - fDz ; |
---|
| 663 | |
---|
| 664 | if (safex > safe) safe = safex ; |
---|
| 665 | if (safey > safe) safe = safey ; |
---|
| 666 | if (safez > safe) safe = safez ; |
---|
| 667 | |
---|
| 668 | return safe ; |
---|
| 669 | } |
---|
| 670 | |
---|
| 671 | ///////////////////////////////////////////////////////////////////////// |
---|
| 672 | // |
---|
| 673 | // Calcluate distance to surface of box from inside |
---|
| 674 | // by calculating distances to box's x/y/z planes. |
---|
| 675 | // Smallest distance is exact distance to exiting. |
---|
| 676 | // - Eliminate one side of each pair by considering direction of v |
---|
| 677 | // - when leaving a surface & v.close, return 0 |
---|
| 678 | |
---|
| 679 | G4double G4Box::DistanceToOut( const G4ThreeVector& p,const G4ThreeVector& v, |
---|
| 680 | const G4bool calcNorm, |
---|
| 681 | G4bool *validNorm,G4ThreeVector *n) const |
---|
| 682 | { |
---|
| 683 | ESide side = kUndefined ; |
---|
| 684 | G4double pdist,stmp,snxt; |
---|
| 685 | |
---|
| 686 | if (calcNorm) *validNorm = true ; // All normals are valid |
---|
| 687 | |
---|
| 688 | if (v.x() > 0) // X planes |
---|
| 689 | { |
---|
| 690 | pdist = fDx - p.x() ; |
---|
| 691 | |
---|
| 692 | if (pdist > kCarTolerance*0.5) |
---|
| 693 | { |
---|
| 694 | snxt = pdist/v.x() ; |
---|
| 695 | side = kPX ; |
---|
| 696 | } |
---|
| 697 | else |
---|
| 698 | { |
---|
| 699 | if (calcNorm) *n = G4ThreeVector(1,0,0) ; |
---|
| 700 | return snxt = 0 ; |
---|
| 701 | } |
---|
| 702 | } |
---|
| 703 | else if (v.x() < 0) |
---|
| 704 | { |
---|
| 705 | pdist = fDx + p.x() ; |
---|
| 706 | |
---|
| 707 | if (pdist > kCarTolerance*0.5) |
---|
| 708 | { |
---|
| 709 | snxt = -pdist/v.x() ; |
---|
| 710 | side = kMX ; |
---|
| 711 | } |
---|
| 712 | else |
---|
| 713 | { |
---|
| 714 | if (calcNorm) *n = G4ThreeVector(-1,0,0) ; |
---|
| 715 | return snxt = 0 ; |
---|
| 716 | } |
---|
| 717 | } |
---|
| 718 | else snxt = kInfinity ; |
---|
| 719 | |
---|
| 720 | if ( v.y() > 0 ) // Y planes |
---|
| 721 | { |
---|
| 722 | pdist=fDy-p.y(); |
---|
| 723 | |
---|
| 724 | if (pdist>kCarTolerance*0.5) |
---|
| 725 | { |
---|
| 726 | stmp=pdist/v.y(); |
---|
| 727 | |
---|
| 728 | if (stmp<snxt) |
---|
| 729 | { |
---|
| 730 | snxt=stmp; |
---|
| 731 | side=kPY; |
---|
| 732 | } |
---|
| 733 | } |
---|
| 734 | else |
---|
| 735 | { |
---|
| 736 | if (calcNorm) *n = G4ThreeVector(0,1,0) ; |
---|
| 737 | return snxt = 0 ; |
---|
| 738 | } |
---|
| 739 | } |
---|
| 740 | else if ( v.y() < 0 ) |
---|
| 741 | { |
---|
| 742 | pdist = fDy + p.y() ; |
---|
| 743 | |
---|
| 744 | if (pdist > kCarTolerance*0.5) |
---|
| 745 | { |
---|
| 746 | stmp=-pdist/v.y(); |
---|
| 747 | |
---|
| 748 | if (stmp<snxt) |
---|
| 749 | { |
---|
| 750 | snxt=stmp; |
---|
| 751 | side=kMY; |
---|
| 752 | } |
---|
| 753 | } |
---|
| 754 | else |
---|
| 755 | { |
---|
| 756 | if (calcNorm) *n = G4ThreeVector(0,-1,0) ; |
---|
| 757 | return snxt = 0 ; |
---|
| 758 | } |
---|
| 759 | } |
---|
| 760 | if (v.z()>0) // Z planes |
---|
| 761 | { |
---|
| 762 | pdist=fDz-p.z(); |
---|
| 763 | |
---|
| 764 | if (pdist > kCarTolerance*0.5) |
---|
| 765 | { |
---|
| 766 | stmp=pdist/v.z(); |
---|
| 767 | |
---|
| 768 | if (stmp < snxt) |
---|
| 769 | { |
---|
| 770 | snxt=stmp; |
---|
| 771 | side=kPZ; |
---|
| 772 | } |
---|
| 773 | } |
---|
| 774 | else |
---|
| 775 | { |
---|
| 776 | if (calcNorm) *n = G4ThreeVector(0,0,1) ; |
---|
| 777 | return snxt = 0 ; |
---|
| 778 | } |
---|
| 779 | } |
---|
| 780 | else if (v.z()<0) |
---|
| 781 | { |
---|
| 782 | pdist = fDz + p.z() ; |
---|
| 783 | |
---|
| 784 | if (pdist > kCarTolerance*0.5) |
---|
| 785 | { |
---|
| 786 | stmp=-pdist/v.z(); |
---|
| 787 | |
---|
| 788 | if (stmp < snxt) |
---|
| 789 | { |
---|
| 790 | snxt=stmp; |
---|
| 791 | side=kMZ; |
---|
| 792 | } |
---|
| 793 | } |
---|
| 794 | else |
---|
| 795 | { |
---|
| 796 | if (calcNorm) *n = G4ThreeVector(0,0,-1) ; |
---|
| 797 | return snxt = 0 ; |
---|
| 798 | } |
---|
| 799 | } |
---|
| 800 | if (calcNorm) |
---|
| 801 | { |
---|
| 802 | switch (side) |
---|
| 803 | { |
---|
| 804 | case kPX: |
---|
| 805 | *n=G4ThreeVector(1,0,0); |
---|
| 806 | break; |
---|
| 807 | case kMX: |
---|
| 808 | *n=G4ThreeVector(-1,0,0); |
---|
| 809 | break; |
---|
| 810 | case kPY: |
---|
| 811 | *n=G4ThreeVector(0,1,0); |
---|
| 812 | break; |
---|
| 813 | case kMY: |
---|
| 814 | *n=G4ThreeVector(0,-1,0); |
---|
| 815 | break; |
---|
| 816 | case kPZ: |
---|
| 817 | *n=G4ThreeVector(0,0,1); |
---|
| 818 | break; |
---|
| 819 | case kMZ: |
---|
| 820 | *n=G4ThreeVector(0,0,-1); |
---|
| 821 | break; |
---|
| 822 | default: |
---|
| 823 | G4cout.precision(16); |
---|
| 824 | G4cout << G4endl; |
---|
| 825 | DumpInfo(); |
---|
| 826 | G4cout << "Position:" << G4endl << G4endl; |
---|
| 827 | G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl; |
---|
| 828 | G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl; |
---|
| 829 | G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl; |
---|
| 830 | G4cout << "Direction:" << G4endl << G4endl; |
---|
| 831 | G4cout << "v.x() = " << v.x() << G4endl; |
---|
| 832 | G4cout << "v.y() = " << v.y() << G4endl; |
---|
| 833 | G4cout << "v.z() = " << v.z() << G4endl << G4endl; |
---|
| 834 | G4cout << "Proposed distance :" << G4endl << G4endl; |
---|
| 835 | G4cout << "snxt = " << snxt/mm << " mm" << G4endl << G4endl; |
---|
| 836 | G4Exception("G4Box::DistanceToOut(p,v,..)","Notification",JustWarning, |
---|
| 837 | "Undefined side for valid surface normal to solid."); |
---|
| 838 | break; |
---|
| 839 | } |
---|
| 840 | } |
---|
| 841 | return snxt; |
---|
| 842 | } |
---|
| 843 | |
---|
| 844 | //////////////////////////////////////////////////////////////////////////// |
---|
| 845 | // |
---|
| 846 | // Calculate exact shortest distance to any boundary from inside |
---|
| 847 | // - If outside return 0 |
---|
| 848 | |
---|
| 849 | G4double G4Box::DistanceToOut(const G4ThreeVector& p) const |
---|
| 850 | { |
---|
| 851 | G4double safx1,safx2,safy1,safy2,safz1,safz2,safe=0.0; |
---|
| 852 | |
---|
| 853 | #ifdef G4CSGDEBUG |
---|
| 854 | if( Inside(p) == kOutside ) |
---|
| 855 | { |
---|
| 856 | G4cout.precision(16) ; |
---|
| 857 | G4cout << G4endl ; |
---|
| 858 | DumpInfo(); |
---|
| 859 | G4cout << "Position:" << G4endl << G4endl ; |
---|
| 860 | G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl ; |
---|
| 861 | G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl ; |
---|
| 862 | G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl ; |
---|
| 863 | G4Exception("G4Box::DistanceToOut(p)", "Notification", JustWarning, |
---|
| 864 | "Point p is outside !?" ); |
---|
| 865 | } |
---|
| 866 | #endif |
---|
| 867 | |
---|
| 868 | safx1 = fDx - p.x() ; |
---|
| 869 | safx2 = fDx + p.x() ; |
---|
| 870 | safy1 = fDy - p.y() ; |
---|
| 871 | safy2 = fDy + p.y() ; |
---|
| 872 | safz1 = fDz - p.z() ; |
---|
| 873 | safz2 = fDz + p.z() ; |
---|
| 874 | |
---|
| 875 | // shortest Dist to any boundary now MIN(safx1,safx2,safy1..) |
---|
| 876 | |
---|
| 877 | if (safx2 < safx1) safe = safx2 ; |
---|
| 878 | else safe = safx1 ; |
---|
| 879 | if (safy1 < safe) safe = safy1 ; |
---|
| 880 | if (safy2 < safe) safe = safy2 ; |
---|
| 881 | if (safz1 < safe) safe = safz1 ; |
---|
| 882 | if (safz2 < safe) safe = safz2 ; |
---|
| 883 | |
---|
| 884 | if (safe < 0) safe = 0 ; |
---|
| 885 | return safe ; |
---|
| 886 | } |
---|
| 887 | |
---|
| 888 | //////////////////////////////////////////////////////////////////////// |
---|
| 889 | // |
---|
| 890 | // Create a List containing the transformed vertices |
---|
| 891 | // Ordering [0-3] -fDz cross section |
---|
| 892 | // [4-7] +fDz cross section such that [0] is below [4], |
---|
| 893 | // [1] below [5] etc. |
---|
| 894 | // Note: |
---|
| 895 | // Caller has deletion resposibility |
---|
| 896 | |
---|
| 897 | G4ThreeVectorList* |
---|
| 898 | G4Box::CreateRotatedVertices(const G4AffineTransform& pTransform) const |
---|
| 899 | { |
---|
| 900 | G4ThreeVectorList* vertices = new G4ThreeVectorList(); |
---|
| 901 | vertices->reserve(8); |
---|
| 902 | |
---|
| 903 | if (vertices) |
---|
| 904 | { |
---|
| 905 | G4ThreeVector vertex0(-fDx,-fDy,-fDz) ; |
---|
| 906 | G4ThreeVector vertex1(fDx,-fDy,-fDz) ; |
---|
| 907 | G4ThreeVector vertex2(fDx,fDy,-fDz) ; |
---|
| 908 | G4ThreeVector vertex3(-fDx,fDy,-fDz) ; |
---|
| 909 | G4ThreeVector vertex4(-fDx,-fDy,fDz) ; |
---|
| 910 | G4ThreeVector vertex5(fDx,-fDy,fDz) ; |
---|
| 911 | G4ThreeVector vertex6(fDx,fDy,fDz) ; |
---|
| 912 | G4ThreeVector vertex7(-fDx,fDy,fDz) ; |
---|
| 913 | |
---|
| 914 | vertices->push_back(pTransform.TransformPoint(vertex0)); |
---|
| 915 | vertices->push_back(pTransform.TransformPoint(vertex1)); |
---|
| 916 | vertices->push_back(pTransform.TransformPoint(vertex2)); |
---|
| 917 | vertices->push_back(pTransform.TransformPoint(vertex3)); |
---|
| 918 | vertices->push_back(pTransform.TransformPoint(vertex4)); |
---|
| 919 | vertices->push_back(pTransform.TransformPoint(vertex5)); |
---|
| 920 | vertices->push_back(pTransform.TransformPoint(vertex6)); |
---|
| 921 | vertices->push_back(pTransform.TransformPoint(vertex7)); |
---|
| 922 | } |
---|
| 923 | else |
---|
| 924 | { |
---|
| 925 | DumpInfo(); |
---|
| 926 | G4Exception("G4Box::CreateRotatedVertices()", |
---|
| 927 | "FatalError", FatalException, |
---|
| 928 | "Error in allocation of vertices. Out of memory !"); |
---|
| 929 | } |
---|
| 930 | return vertices; |
---|
| 931 | } |
---|
| 932 | |
---|
| 933 | ////////////////////////////////////////////////////////////////////////// |
---|
| 934 | // |
---|
| 935 | // GetEntityType |
---|
| 936 | |
---|
| 937 | G4GeometryType G4Box::GetEntityType() const |
---|
| 938 | { |
---|
| 939 | return G4String("G4Box"); |
---|
| 940 | } |
---|
| 941 | |
---|
| 942 | ////////////////////////////////////////////////////////////////////////// |
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| 943 | // |
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| 944 | // Stream object contents to an output stream |
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| 945 | |
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| 946 | std::ostream& G4Box::StreamInfo(std::ostream& os) const |
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| 947 | { |
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| 948 | os << "-----------------------------------------------------------\n" |
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| 949 | << " *** Dump for solid - " << GetName() << " ***\n" |
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| 950 | << " ===================================================\n" |
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| 951 | << " Solid type: G4Box\n" |
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| 952 | << " Parameters: \n" |
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| 953 | << " half length X: " << fDx/mm << " mm \n" |
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| 954 | << " half length Y: " << fDy/mm << " mm \n" |
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| 955 | << " half length Z: " << fDz/mm << " mm \n" |
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| 956 | << "-----------------------------------------------------------\n"; |
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| 957 | |
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| 958 | return os; |
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| 959 | } |
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| 960 | |
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| 961 | ///////////////////////////////////////////////////////////////////////////////////// |
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| 962 | // |
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| 963 | // GetPointOnSurface |
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| 964 | // |
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| 965 | // Return a point (G4ThreeVector) randomly and uniformly selected |
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| 966 | // on the solid surface |
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| 967 | |
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| 968 | G4ThreeVector G4Box::GetPointOnSurface() const |
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| 969 | { |
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| 970 | G4double px, py, pz, select, sumS; |
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| 971 | G4double Sxy = fDx*fDy, Sxz = fDx*fDz, Syz = fDy*fDz; |
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| 972 | |
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| 973 | sumS = Sxy + Sxz + Syz; |
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| 974 | select = sumS*G4UniformRand(); |
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| 975 | |
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| 976 | if( select < Sxy ) |
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| 977 | { |
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| 978 | px = -fDx +2*fDx*G4UniformRand(); |
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| 979 | py = -fDy +2*fDy*G4UniformRand(); |
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| 980 | |
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| 981 | if(G4UniformRand() > 0.5) pz = fDz; |
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| 982 | else pz = -fDz; |
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| 983 | } |
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| 984 | else if ( ( select - Sxy ) < Sxz ) |
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| 985 | { |
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| 986 | px = -fDx +2*fDx*G4UniformRand(); |
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| 987 | pz = -fDz +2*fDz*G4UniformRand(); |
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| 988 | |
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| 989 | if(G4UniformRand() > 0.5) py = fDy; |
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| 990 | else py = -fDy; |
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| 991 | } |
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| 992 | else |
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| 993 | { |
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| 994 | py = -fDy +2*fDy*G4UniformRand(); |
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| 995 | pz = -fDz +2*fDz*G4UniformRand(); |
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| 996 | |
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| 997 | if(G4UniformRand() > 0.5) px = fDx; |
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| 998 | else px = -fDx; |
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| 999 | } |
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| 1000 | return G4ThreeVector(px,py,pz); |
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| 1001 | } |
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| 1002 | |
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| 1003 | ////////////////////////////////////////////////////////////////////////// |
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| 1004 | // |
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| 1005 | // Methods for visualisation |
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| 1006 | |
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| 1007 | void G4Box::DescribeYourselfTo (G4VGraphicsScene& scene) const |
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| 1008 | { |
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| 1009 | scene.AddSolid (*this); |
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| 1010 | } |
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| 1011 | |
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| 1012 | G4VisExtent G4Box::GetExtent() const |
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| 1013 | { |
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| 1014 | return G4VisExtent (-fDx, fDx, -fDy, fDy, -fDz, fDz); |
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| 1015 | } |
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| 1016 | |
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| 1017 | G4Polyhedron* G4Box::CreatePolyhedron () const |
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| 1018 | { |
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| 1019 | return new G4PolyhedronBox (fDx, fDy, fDz); |
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| 1020 | } |
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| 1021 | |
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| 1022 | G4NURBS* G4Box::CreateNURBS () const |
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| 1023 | { |
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| 1024 | return new G4NURBSbox (fDx, fDy, fDz); |
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| 1025 | } |
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