[819] | 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 | // Optical Photon Boundary Process Class Implementation |
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| 28 | //////////////////////////////////////////////////////////////////////// |
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| 29 | // |
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| 30 | // File: G4OpBoundaryProcess.cc |
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| 31 | // Description: Discrete Process -- reflection/refraction at |
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| 32 | // optical interfaces |
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| 33 | // Version: 1.1 |
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| 34 | // Created: 1997-06-18 |
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| 35 | // Modified: 1998-05-25 - Correct parallel component of polarization |
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| 36 | // (thanks to: Stefano Magni + Giovanni Pieri) |
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| 37 | // 1998-05-28 - NULL Rindex pointer before reuse |
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| 38 | // (thanks to: Stefano Magni) |
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| 39 | // 1998-06-11 - delete *sint1 in oblique reflection |
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| 40 | // (thanks to: Giovanni Pieri) |
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| 41 | // 1998-06-19 - move from GetLocalExitNormal() to the new |
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| 42 | // method: GetLocalExitNormal(&valid) to get |
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| 43 | // the surface normal in all cases |
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| 44 | // 1998-11-07 - NULL OpticalSurface pointer before use |
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| 45 | // comparison not sharp for: std::abs(cost1) < 1.0 |
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| 46 | // remove sin1, sin2 in lines 556,567 |
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| 47 | // (thanks to Stefano Magni) |
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| 48 | // 1999-10-10 - Accommodate changes done in DoAbsorption by |
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| 49 | // changing logic in DielectricMetal |
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| 50 | // 2001-10-18 - avoid Linux (gcc-2.95.2) warning about variables |
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| 51 | // might be used uninitialized in this function |
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| 52 | // moved E2_perp, E2_parl and E2_total out of 'if' |
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| 53 | // 2003-11-27 - Modified line 168-9 to reflect changes made to |
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| 54 | // G4OpticalSurface class ( by Fan Lei) |
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| 55 | // 2004-02-02 - Set theStatus = Undefined at start of DoIt |
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| 56 | // 2005-07-28 - add G4ProcessType to constructor |
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| 57 | // 2006-11-04 - add capability of calculating the reflectivity |
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| 58 | // off a metal surface by way of a complex index |
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| 59 | // of refraction - Thanks to Sehwook Lee and John |
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| 60 | // Hauptman (Dept. of Physics - Iowa State Univ.) |
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| 61 | // |
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| 62 | // Author: Peter Gumplinger |
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| 63 | // adopted from work by Werner Keil - April 2/96 |
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| 64 | // mail: gum@triumf.ca |
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| 65 | // |
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| 66 | //////////////////////////////////////////////////////////////////////// |
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| 67 | |
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| 68 | #include "G4ios.hh" |
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[963] | 69 | #include "G4OpProcessSubType.hh" |
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| 70 | |
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[819] | 71 | #include "G4OpBoundaryProcess.hh" |
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| 72 | #include "G4GeometryTolerance.hh" |
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| 73 | |
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| 74 | ///////////////////////// |
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| 75 | // Class Implementation |
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| 76 | ///////////////////////// |
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| 77 | |
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| 78 | ////////////// |
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| 79 | // Operators |
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| 80 | ////////////// |
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| 81 | |
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| 82 | // G4OpBoundaryProcess::operator=(const G4OpBoundaryProcess &right) |
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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 | // Constructors |
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| 88 | ///////////////// |
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| 89 | |
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| 90 | G4OpBoundaryProcess::G4OpBoundaryProcess(const G4String& processName, |
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| 91 | G4ProcessType type) |
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| 92 | : G4VDiscreteProcess(processName, type) |
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| 93 | { |
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| 94 | if ( verboseLevel > 0) { |
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| 95 | G4cout << GetProcessName() << " is created " << G4endl; |
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| 96 | } |
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| 97 | |
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[963] | 98 | SetProcessSubType(fOpBoundary); |
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| 99 | |
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[819] | 100 | theStatus = Undefined; |
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| 101 | theModel = glisur; |
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| 102 | theFinish = polished; |
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| 103 | theReflectivity = 1.; |
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| 104 | theEfficiency = 0.; |
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| 105 | |
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| 106 | prob_sl = 0.; |
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| 107 | prob_ss = 0.; |
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| 108 | prob_bs = 0.; |
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| 109 | |
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| 110 | kCarTolerance = G4GeometryTolerance::GetInstance() |
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| 111 | ->GetSurfaceTolerance(); |
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| 112 | |
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| 113 | } |
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| 114 | |
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| 115 | // G4OpBoundaryProcess::G4OpBoundaryProcess(const G4OpBoundaryProcess &right) |
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| 116 | // { |
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| 117 | // } |
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| 118 | |
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| 119 | //////////////// |
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| 120 | // Destructors |
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| 121 | //////////////// |
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| 122 | |
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| 123 | G4OpBoundaryProcess::~G4OpBoundaryProcess(){} |
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| 124 | |
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| 125 | //////////// |
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| 126 | // Methods |
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| 127 | //////////// |
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| 128 | |
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| 129 | // PostStepDoIt |
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| 130 | // ------------ |
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| 131 | // |
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| 132 | G4VParticleChange* |
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| 133 | G4OpBoundaryProcess::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep) |
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| 134 | { |
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| 135 | theStatus = Undefined; |
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| 136 | |
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| 137 | aParticleChange.Initialize(aTrack); |
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| 138 | |
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| 139 | G4StepPoint* pPreStepPoint = aStep.GetPreStepPoint(); |
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| 140 | G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint(); |
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| 141 | |
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| 142 | if (pPostStepPoint->GetStepStatus() != fGeomBoundary){ |
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| 143 | theStatus = NotAtBoundary; |
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| 144 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 145 | } |
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| 146 | if (aTrack.GetStepLength()<=kCarTolerance/2){ |
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| 147 | theStatus = StepTooSmall; |
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| 148 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 149 | } |
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| 150 | |
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| 151 | Material1 = pPreStepPoint -> GetMaterial(); |
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| 152 | Material2 = pPostStepPoint -> GetMaterial(); |
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| 153 | |
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| 154 | const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle(); |
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| 155 | |
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| 156 | thePhotonMomentum = aParticle->GetTotalMomentum(); |
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| 157 | OldMomentum = aParticle->GetMomentumDirection(); |
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| 158 | OldPolarization = aParticle->GetPolarization(); |
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| 159 | |
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| 160 | G4ThreeVector theGlobalPoint = pPostStepPoint->GetPosition(); |
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| 161 | |
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| 162 | G4Navigator* theNavigator = |
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| 163 | G4TransportationManager::GetTransportationManager()-> |
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| 164 | GetNavigatorForTracking(); |
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| 165 | |
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| 166 | G4ThreeVector theLocalPoint = theNavigator-> |
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| 167 | GetGlobalToLocalTransform(). |
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| 168 | TransformPoint(theGlobalPoint); |
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| 169 | |
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| 170 | G4ThreeVector theLocalNormal; // Normal points back into volume |
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| 171 | |
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| 172 | G4bool valid; |
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| 173 | theLocalNormal = theNavigator->GetLocalExitNormal(&valid); |
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| 174 | |
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| 175 | if (valid) { |
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| 176 | theLocalNormal = -theLocalNormal; |
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| 177 | } |
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| 178 | else { |
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| 179 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
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[1055] | 180 | << " The Navigator reports that it returned an invalid normal" |
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| 181 | << G4endl; |
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| 182 | G4Exception("G4OpBoundaryProcess::PostStepDoIt", |
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| 183 | "Invalid Surface Normal", |
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| 184 | EventMustBeAborted, |
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| 185 | "Geometry must return valid surface normal"); |
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[819] | 186 | } |
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| 187 | |
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| 188 | theGlobalNormal = theNavigator->GetLocalToGlobalTransform(). |
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| 189 | TransformAxis(theLocalNormal); |
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| 190 | |
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| 191 | if (OldMomentum * theGlobalNormal > 0.0) { |
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| 192 | #ifdef G4DEBUG_OPTICAL |
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| 193 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
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| 194 | << " theGlobalNormal points the wrong direction " |
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| 195 | << G4endl; |
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| 196 | #endif |
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| 197 | theGlobalNormal = -theGlobalNormal; |
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| 198 | } |
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| 199 | |
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| 200 | G4MaterialPropertiesTable* aMaterialPropertiesTable; |
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| 201 | G4MaterialPropertyVector* Rindex; |
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| 202 | |
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| 203 | aMaterialPropertiesTable = Material1->GetMaterialPropertiesTable(); |
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| 204 | if (aMaterialPropertiesTable) { |
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| 205 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
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| 206 | } |
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| 207 | else { |
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| 208 | theStatus = NoRINDEX; |
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| 209 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 210 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 211 | } |
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| 212 | |
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| 213 | if (Rindex) { |
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| 214 | Rindex1 = Rindex->GetProperty(thePhotonMomentum); |
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| 215 | } |
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| 216 | else { |
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| 217 | theStatus = NoRINDEX; |
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| 218 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 219 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 220 | } |
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| 221 | |
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| 222 | theModel = glisur; |
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| 223 | theFinish = polished; |
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| 224 | |
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| 225 | G4SurfaceType type = dielectric_dielectric; |
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| 226 | |
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| 227 | Rindex = NULL; |
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| 228 | OpticalSurface = NULL; |
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| 229 | |
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[963] | 230 | G4LogicalSurface* Surface = NULL; |
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[819] | 231 | |
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[963] | 232 | Surface = G4LogicalBorderSurface::GetSurface |
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| 233 | (pPreStepPoint ->GetPhysicalVolume(), |
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| 234 | pPostStepPoint->GetPhysicalVolume()); |
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| 235 | |
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[819] | 236 | if (Surface == NULL){ |
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| 237 | G4bool enteredDaughter=(pPostStepPoint->GetPhysicalVolume() |
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| 238 | ->GetMotherLogical() == |
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| 239 | pPreStepPoint->GetPhysicalVolume() |
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| 240 | ->GetLogicalVolume()); |
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| 241 | if(enteredDaughter){ |
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| 242 | Surface = G4LogicalSkinSurface::GetSurface |
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| 243 | (pPostStepPoint->GetPhysicalVolume()-> |
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| 244 | GetLogicalVolume()); |
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| 245 | if(Surface == NULL) |
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| 246 | Surface = G4LogicalSkinSurface::GetSurface |
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| 247 | (pPreStepPoint->GetPhysicalVolume()-> |
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| 248 | GetLogicalVolume()); |
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| 249 | } |
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| 250 | else { |
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| 251 | Surface = G4LogicalSkinSurface::GetSurface |
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| 252 | (pPreStepPoint->GetPhysicalVolume()-> |
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| 253 | GetLogicalVolume()); |
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| 254 | if(Surface == NULL) |
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| 255 | Surface = G4LogicalSkinSurface::GetSurface |
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| 256 | (pPostStepPoint->GetPhysicalVolume()-> |
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| 257 | GetLogicalVolume()); |
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| 258 | } |
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| 259 | } |
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| 260 | |
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[963] | 261 | if (Surface) OpticalSurface = |
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| 262 | dynamic_cast <G4OpticalSurface*> (Surface->GetSurfaceProperty()); |
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[819] | 263 | |
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| 264 | if (OpticalSurface) { |
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| 265 | |
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| 266 | type = OpticalSurface->GetType(); |
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| 267 | theModel = OpticalSurface->GetModel(); |
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| 268 | theFinish = OpticalSurface->GetFinish(); |
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| 269 | |
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| 270 | aMaterialPropertiesTable = OpticalSurface-> |
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| 271 | GetMaterialPropertiesTable(); |
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| 272 | |
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| 273 | if (aMaterialPropertiesTable) { |
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| 274 | |
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| 275 | if (theFinish == polishedbackpainted || |
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| 276 | theFinish == groundbackpainted ) { |
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| 277 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
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| 278 | if (Rindex) { |
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| 279 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
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| 280 | } |
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| 281 | else { |
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| 282 | theStatus = NoRINDEX; |
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| 283 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 284 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 285 | } |
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| 286 | } |
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| 287 | |
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| 288 | PropertyPointer = |
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| 289 | aMaterialPropertiesTable->GetProperty("REFLECTIVITY"); |
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| 290 | PropertyPointer1 = |
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| 291 | aMaterialPropertiesTable->GetProperty("REALRINDEX"); |
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| 292 | PropertyPointer2 = |
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| 293 | aMaterialPropertiesTable->GetProperty("IMAGINARYRINDEX"); |
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| 294 | |
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| 295 | iTE = 1; |
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| 296 | iTM = 1; |
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| 297 | |
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| 298 | if (PropertyPointer) { |
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| 299 | |
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| 300 | theReflectivity = |
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| 301 | PropertyPointer->GetProperty(thePhotonMomentum); |
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| 302 | |
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| 303 | } else if (PropertyPointer1 && PropertyPointer2) { |
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| 304 | |
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[1055] | 305 | CalculateReflectivity(); |
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[819] | 306 | |
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| 307 | } else { |
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| 308 | theReflectivity = 1.0; |
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| 309 | } |
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| 310 | |
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| 311 | PropertyPointer = |
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| 312 | aMaterialPropertiesTable->GetProperty("EFFICIENCY"); |
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| 313 | if (PropertyPointer) { |
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| 314 | theEfficiency = |
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| 315 | PropertyPointer->GetProperty(thePhotonMomentum); |
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| 316 | } else { |
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| 317 | theEfficiency = 0.0; |
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| 318 | } |
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| 319 | |
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| 320 | if ( theModel == unified ) { |
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| 321 | PropertyPointer = |
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| 322 | aMaterialPropertiesTable->GetProperty("SPECULARLOBECONSTANT"); |
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| 323 | if (PropertyPointer) { |
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| 324 | prob_sl = |
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| 325 | PropertyPointer->GetProperty(thePhotonMomentum); |
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| 326 | } else { |
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| 327 | prob_sl = 0.0; |
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| 328 | } |
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| 329 | |
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| 330 | PropertyPointer = |
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| 331 | aMaterialPropertiesTable->GetProperty("SPECULARSPIKECONSTANT"); |
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| 332 | if (PropertyPointer) { |
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| 333 | prob_ss = |
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| 334 | PropertyPointer->GetProperty(thePhotonMomentum); |
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| 335 | } else { |
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| 336 | prob_ss = 0.0; |
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| 337 | } |
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| 338 | |
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| 339 | PropertyPointer = |
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| 340 | aMaterialPropertiesTable->GetProperty("BACKSCATTERCONSTANT"); |
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| 341 | if (PropertyPointer) { |
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| 342 | prob_bs = |
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| 343 | PropertyPointer->GetProperty(thePhotonMomentum); |
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| 344 | } else { |
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| 345 | prob_bs = 0.0; |
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| 346 | } |
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| 347 | } |
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| 348 | } |
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| 349 | else if (theFinish == polishedbackpainted || |
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| 350 | theFinish == groundbackpainted ) { |
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| 351 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 352 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 353 | } |
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| 354 | } |
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| 355 | |
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| 356 | if (type == dielectric_dielectric ) { |
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| 357 | if (theFinish == polished || theFinish == ground ) { |
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| 358 | |
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| 359 | if (Material1 == Material2){ |
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| 360 | theStatus = SameMaterial; |
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| 361 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 362 | } |
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| 363 | aMaterialPropertiesTable = |
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| 364 | Material2->GetMaterialPropertiesTable(); |
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| 365 | if (aMaterialPropertiesTable) |
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| 366 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
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| 367 | if (Rindex) { |
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| 368 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
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| 369 | } |
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| 370 | else { |
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| 371 | theStatus = NoRINDEX; |
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| 372 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 373 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 374 | } |
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| 375 | } |
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| 376 | } |
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| 377 | |
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| 378 | if ( verboseLevel > 0 ) { |
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| 379 | G4cout << " Photon at Boundary! " << G4endl; |
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| 380 | G4cout << " Old Momentum Direction: " << OldMomentum << G4endl; |
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| 381 | G4cout << " Old Polarization: " << OldPolarization << G4endl; |
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| 382 | } |
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| 383 | |
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| 384 | if (type == dielectric_metal) { |
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| 385 | |
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| 386 | DielectricMetal(); |
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| 387 | |
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[963] | 388 | // Uncomment the following lines if you wish to have |
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| 389 | // Transmission instead of Absorption |
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| 390 | // if (theStatus == Absorption) { |
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| 391 | // return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 392 | // } |
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| 393 | |
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[819] | 394 | } |
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| 395 | else if (type == dielectric_dielectric) { |
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| 396 | |
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| 397 | if ( theFinish == polishedfrontpainted || |
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| 398 | theFinish == groundfrontpainted ) { |
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| 399 | |
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| 400 | if( !G4BooleanRand(theReflectivity) ) { |
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| 401 | DoAbsorption(); |
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| 402 | } |
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| 403 | else { |
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| 404 | if ( theFinish == groundfrontpainted ) |
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| 405 | theStatus = LambertianReflection; |
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| 406 | DoReflection(); |
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| 407 | } |
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| 408 | } |
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| 409 | else { |
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| 410 | DielectricDielectric(); |
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| 411 | } |
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| 412 | } |
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| 413 | else { |
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| 414 | |
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| 415 | G4cerr << " Error: G4BoundaryProcess: illegal boundary type " << G4endl; |
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| 416 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 417 | |
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| 418 | } |
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| 419 | |
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| 420 | NewMomentum = NewMomentum.unit(); |
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| 421 | NewPolarization = NewPolarization.unit(); |
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| 422 | |
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| 423 | if ( verboseLevel > 0) { |
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| 424 | G4cout << " New Momentum Direction: " << NewMomentum << G4endl; |
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| 425 | G4cout << " New Polarization: " << NewPolarization << G4endl; |
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| 426 | if ( theStatus == Undefined ) |
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| 427 | G4cout << " *** Undefined *** " << G4endl; |
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| 428 | if ( theStatus == FresnelRefraction ) |
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| 429 | G4cout << " *** FresnelRefraction *** " << G4endl; |
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| 430 | if ( theStatus == FresnelReflection ) |
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| 431 | G4cout << " *** FresnelReflection *** " << G4endl; |
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| 432 | if ( theStatus == TotalInternalReflection ) |
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| 433 | G4cout << " *** TotalInternalReflection *** " << G4endl; |
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| 434 | if ( theStatus == LambertianReflection ) |
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| 435 | G4cout << " *** LambertianReflection *** " << G4endl; |
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| 436 | if ( theStatus == LobeReflection ) |
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| 437 | G4cout << " *** LobeReflection *** " << G4endl; |
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| 438 | if ( theStatus == SpikeReflection ) |
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| 439 | G4cout << " *** SpikeReflection *** " << G4endl; |
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| 440 | if ( theStatus == BackScattering ) |
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| 441 | G4cout << " *** BackScattering *** " << G4endl; |
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| 442 | if ( theStatus == Absorption ) |
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| 443 | G4cout << " *** Absorption *** " << G4endl; |
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| 444 | if ( theStatus == Detection ) |
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| 445 | G4cout << " *** Detection *** " << G4endl; |
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| 446 | if ( theStatus == NotAtBoundary ) |
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| 447 | G4cout << " *** NotAtBoundary *** " << G4endl; |
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| 448 | if ( theStatus == SameMaterial ) |
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| 449 | G4cout << " *** SameMaterial *** " << G4endl; |
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| 450 | if ( theStatus == StepTooSmall ) |
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| 451 | G4cout << " *** StepTooSmall *** " << G4endl; |
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| 452 | if ( theStatus == NoRINDEX ) |
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| 453 | G4cout << " *** NoRINDEX *** " << G4endl; |
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| 454 | } |
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| 455 | |
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| 456 | aParticleChange.ProposeMomentumDirection(NewMomentum); |
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| 457 | aParticleChange.ProposePolarization(NewPolarization); |
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| 458 | |
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| 459 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
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| 460 | } |
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| 461 | |
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| 462 | G4ThreeVector |
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| 463 | G4OpBoundaryProcess::GetFacetNormal(const G4ThreeVector& Momentum, |
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| 464 | const G4ThreeVector& Normal ) const |
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| 465 | { |
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| 466 | G4ThreeVector FacetNormal; |
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| 467 | |
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| 468 | if (theModel == unified) { |
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| 469 | |
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| 470 | /* This function code alpha to a random value taken from the |
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| 471 | distribution p(alpha) = g(alpha; 0, sigma_alpha)*std::sin(alpha), |
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| 472 | for alpha > 0 and alpha < 90, where g(alpha; 0, sigma_alpha) |
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| 473 | is a gaussian distribution with mean 0 and standard deviation |
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| 474 | sigma_alpha. */ |
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| 475 | |
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| 476 | G4double alpha; |
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| 477 | |
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| 478 | G4double sigma_alpha = 0.0; |
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| 479 | if (OpticalSurface) sigma_alpha = OpticalSurface->GetSigmaAlpha(); |
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| 480 | |
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| 481 | G4double f_max = std::min(1.0,4.*sigma_alpha); |
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| 482 | |
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| 483 | do { |
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| 484 | do { |
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| 485 | alpha = G4RandGauss::shoot(0.0,sigma_alpha); |
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| 486 | } while (G4UniformRand()*f_max > std::sin(alpha) || alpha >= halfpi ); |
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| 487 | |
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| 488 | G4double phi = G4UniformRand()*twopi; |
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| 489 | |
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| 490 | G4double SinAlpha = std::sin(alpha); |
---|
| 491 | G4double CosAlpha = std::cos(alpha); |
---|
| 492 | G4double SinPhi = std::sin(phi); |
---|
| 493 | G4double CosPhi = std::cos(phi); |
---|
| 494 | |
---|
| 495 | G4double unit_x = SinAlpha * CosPhi; |
---|
| 496 | G4double unit_y = SinAlpha * SinPhi; |
---|
| 497 | G4double unit_z = CosAlpha; |
---|
| 498 | |
---|
| 499 | FacetNormal.setX(unit_x); |
---|
| 500 | FacetNormal.setY(unit_y); |
---|
| 501 | FacetNormal.setZ(unit_z); |
---|
| 502 | |
---|
| 503 | G4ThreeVector tmpNormal = Normal; |
---|
| 504 | |
---|
| 505 | FacetNormal.rotateUz(tmpNormal); |
---|
| 506 | } while (Momentum * FacetNormal >= 0.0); |
---|
| 507 | } |
---|
| 508 | else { |
---|
| 509 | |
---|
| 510 | G4double polish = 1.0; |
---|
| 511 | if (OpticalSurface) polish = OpticalSurface->GetPolish(); |
---|
| 512 | |
---|
| 513 | if (polish < 1.0) { |
---|
| 514 | do { |
---|
| 515 | G4ThreeVector smear; |
---|
| 516 | do { |
---|
| 517 | smear.setX(2.*G4UniformRand()-1.0); |
---|
| 518 | smear.setY(2.*G4UniformRand()-1.0); |
---|
| 519 | smear.setZ(2.*G4UniformRand()-1.0); |
---|
| 520 | } while (smear.mag()>1.0); |
---|
| 521 | smear = (1.-polish) * smear; |
---|
| 522 | FacetNormal = Normal + smear; |
---|
| 523 | } while (Momentum * FacetNormal >= 0.0); |
---|
| 524 | FacetNormal = FacetNormal.unit(); |
---|
| 525 | } |
---|
| 526 | else { |
---|
| 527 | FacetNormal = Normal; |
---|
| 528 | } |
---|
| 529 | } |
---|
| 530 | return FacetNormal; |
---|
| 531 | } |
---|
| 532 | |
---|
| 533 | void G4OpBoundaryProcess::DielectricMetal() |
---|
| 534 | { |
---|
| 535 | G4int n = 0; |
---|
| 536 | |
---|
| 537 | do { |
---|
| 538 | |
---|
| 539 | n++; |
---|
| 540 | |
---|
| 541 | if( !G4BooleanRand(theReflectivity) && n == 1 ) { |
---|
| 542 | |
---|
[1055] | 543 | // Comment out DoAbsorption and uncomment theStatus = Absorption; |
---|
| 544 | // if you wish to have Transmission instead of Absorption |
---|
[963] | 545 | |
---|
[819] | 546 | DoAbsorption(); |
---|
[1055] | 547 | // theStatus = Absorption; |
---|
[819] | 548 | break; |
---|
| 549 | |
---|
| 550 | } |
---|
| 551 | else { |
---|
| 552 | |
---|
[1055] | 553 | if (PropertyPointer1 && PropertyPointer2) { |
---|
| 554 | if ( n > 1 ) { |
---|
| 555 | CalculateReflectivity(); |
---|
| 556 | if ( !G4BooleanRand(theReflectivity) ) { |
---|
| 557 | DoAbsorption(); |
---|
| 558 | break; |
---|
| 559 | } |
---|
| 560 | } |
---|
| 561 | } |
---|
| 562 | |
---|
[819] | 563 | if ( theModel == glisur || theFinish == polished ) { |
---|
| 564 | |
---|
| 565 | DoReflection(); |
---|
| 566 | |
---|
| 567 | } else { |
---|
| 568 | |
---|
| 569 | if ( n == 1 ) ChooseReflection(); |
---|
| 570 | |
---|
| 571 | if ( theStatus == LambertianReflection ) { |
---|
| 572 | DoReflection(); |
---|
| 573 | } |
---|
| 574 | else if ( theStatus == BackScattering ) { |
---|
| 575 | NewMomentum = -OldMomentum; |
---|
| 576 | NewPolarization = -OldPolarization; |
---|
| 577 | } |
---|
| 578 | else { |
---|
| 579 | |
---|
[1055] | 580 | if(theStatus==LobeReflection){ |
---|
| 581 | if ( PropertyPointer1 && PropertyPointer2 ){ |
---|
| 582 | } else { |
---|
| 583 | theFacetNormal = |
---|
| 584 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
| 585 | } |
---|
| 586 | } |
---|
[819] | 587 | |
---|
| 588 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 589 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 590 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
| 591 | |
---|
| 592 | G4ThreeVector A_trans, A_paral; |
---|
| 593 | |
---|
| 594 | if (sint1 > 0.0 ) { |
---|
| 595 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
| 596 | A_trans = A_trans.unit(); |
---|
| 597 | } else { |
---|
| 598 | A_trans = OldPolarization; |
---|
| 599 | } |
---|
| 600 | A_paral = NewMomentum.cross(A_trans); |
---|
| 601 | A_paral = A_paral.unit(); |
---|
| 602 | |
---|
| 603 | if(iTE>0&&iTM>0) { |
---|
| 604 | NewPolarization = |
---|
| 605 | -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
| 606 | } else if (iTE>0) { |
---|
| 607 | NewPolarization = -A_trans; |
---|
| 608 | } else if (iTM>0) { |
---|
| 609 | NewPolarization = -A_paral; |
---|
| 610 | } |
---|
| 611 | |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | } |
---|
| 615 | |
---|
| 616 | OldMomentum = NewMomentum; |
---|
| 617 | OldPolarization = NewPolarization; |
---|
| 618 | |
---|
| 619 | } |
---|
| 620 | |
---|
| 621 | } while (NewMomentum * theGlobalNormal < 0.0); |
---|
| 622 | } |
---|
| 623 | |
---|
| 624 | void G4OpBoundaryProcess::DielectricDielectric() |
---|
| 625 | { |
---|
| 626 | G4bool Inside = false; |
---|
| 627 | G4bool Swap = false; |
---|
| 628 | |
---|
| 629 | leap: |
---|
| 630 | |
---|
| 631 | G4bool Through = false; |
---|
| 632 | G4bool Done = false; |
---|
| 633 | |
---|
| 634 | do { |
---|
| 635 | |
---|
| 636 | if (Through) { |
---|
| 637 | Swap = !Swap; |
---|
| 638 | Through = false; |
---|
| 639 | theGlobalNormal = -theGlobalNormal; |
---|
[963] | 640 | G4SwapPtr(Material1,Material2); |
---|
| 641 | G4SwapObj(&Rindex1,&Rindex2); |
---|
[819] | 642 | } |
---|
| 643 | |
---|
| 644 | if ( theFinish == ground || theFinish == groundbackpainted ) { |
---|
| 645 | theFacetNormal = |
---|
| 646 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
| 647 | } |
---|
| 648 | else { |
---|
| 649 | theFacetNormal = theGlobalNormal; |
---|
| 650 | } |
---|
| 651 | |
---|
| 652 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 653 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
| 654 | |
---|
| 655 | cost1 = - PdotN; |
---|
| 656 | if (std::abs(cost1) < 1.0-kCarTolerance){ |
---|
| 657 | sint1 = std::sqrt(1.-cost1*cost1); |
---|
| 658 | sint2 = sint1*Rindex1/Rindex2; // *** Snell's Law *** |
---|
| 659 | } |
---|
| 660 | else { |
---|
| 661 | sint1 = 0.0; |
---|
| 662 | sint2 = 0.0; |
---|
| 663 | } |
---|
| 664 | |
---|
| 665 | if (sint2 >= 1.0) { |
---|
| 666 | |
---|
| 667 | // Simulate total internal reflection |
---|
| 668 | |
---|
| 669 | if (Swap) Swap = !Swap; |
---|
| 670 | |
---|
| 671 | theStatus = TotalInternalReflection; |
---|
| 672 | |
---|
| 673 | if ( theModel == unified && theFinish != polished ) |
---|
| 674 | ChooseReflection(); |
---|
| 675 | |
---|
| 676 | if ( theStatus == LambertianReflection ) { |
---|
| 677 | DoReflection(); |
---|
| 678 | } |
---|
| 679 | else if ( theStatus == BackScattering ) { |
---|
| 680 | NewMomentum = -OldMomentum; |
---|
| 681 | NewPolarization = -OldPolarization; |
---|
| 682 | } |
---|
| 683 | else { |
---|
| 684 | |
---|
| 685 | PdotN = OldMomentum * theFacetNormal; |
---|
| 686 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 687 | EdotN = OldPolarization * theFacetNormal; |
---|
| 688 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
| 689 | |
---|
| 690 | } |
---|
| 691 | } |
---|
| 692 | else if (sint2 < 1.0) { |
---|
| 693 | |
---|
| 694 | // Calculate amplitude for transmission (Q = P x N) |
---|
| 695 | |
---|
| 696 | if (cost1 > 0.0) { |
---|
| 697 | cost2 = std::sqrt(1.-sint2*sint2); |
---|
| 698 | } |
---|
| 699 | else { |
---|
| 700 | cost2 = -std::sqrt(1.-sint2*sint2); |
---|
| 701 | } |
---|
| 702 | |
---|
| 703 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
| 704 | G4double E1_perp, E1_parl; |
---|
| 705 | |
---|
| 706 | if (sint1 > 0.0) { |
---|
| 707 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
| 708 | A_trans = A_trans.unit(); |
---|
| 709 | E1_perp = OldPolarization * A_trans; |
---|
| 710 | E1pp = E1_perp * A_trans; |
---|
| 711 | E1pl = OldPolarization - E1pp; |
---|
| 712 | E1_parl = E1pl.mag(); |
---|
| 713 | } |
---|
| 714 | else { |
---|
| 715 | A_trans = OldPolarization; |
---|
| 716 | // Here we Follow Jackson's conventions and we set the |
---|
| 717 | // parallel component = 1 in case of a ray perpendicular |
---|
| 718 | // to the surface |
---|
| 719 | E1_perp = 0.0; |
---|
| 720 | E1_parl = 1.0; |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | G4double s1 = Rindex1*cost1; |
---|
| 724 | G4double E2_perp = 2.*s1*E1_perp/(Rindex1*cost1+Rindex2*cost2); |
---|
| 725 | G4double E2_parl = 2.*s1*E1_parl/(Rindex2*cost1+Rindex1*cost2); |
---|
| 726 | G4double E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
| 727 | G4double s2 = Rindex2*cost2*E2_total; |
---|
| 728 | |
---|
| 729 | G4double TransCoeff; |
---|
| 730 | |
---|
| 731 | if (cost1 != 0.0) { |
---|
| 732 | TransCoeff = s2/s1; |
---|
| 733 | } |
---|
| 734 | else { |
---|
| 735 | TransCoeff = 0.0; |
---|
| 736 | } |
---|
| 737 | |
---|
| 738 | G4double E2_abs, C_parl, C_perp; |
---|
| 739 | |
---|
| 740 | if ( !G4BooleanRand(TransCoeff) ) { |
---|
| 741 | |
---|
| 742 | // Simulate reflection |
---|
| 743 | |
---|
| 744 | if (Swap) Swap = !Swap; |
---|
| 745 | |
---|
| 746 | theStatus = FresnelReflection; |
---|
| 747 | |
---|
| 748 | if ( theModel == unified && theFinish != polished ) |
---|
| 749 | ChooseReflection(); |
---|
| 750 | |
---|
| 751 | if ( theStatus == LambertianReflection ) { |
---|
| 752 | DoReflection(); |
---|
| 753 | } |
---|
| 754 | else if ( theStatus == BackScattering ) { |
---|
| 755 | NewMomentum = -OldMomentum; |
---|
| 756 | NewPolarization = -OldPolarization; |
---|
| 757 | } |
---|
| 758 | else { |
---|
| 759 | |
---|
| 760 | PdotN = OldMomentum * theFacetNormal; |
---|
| 761 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 762 | |
---|
| 763 | if (sint1 > 0.0) { // incident ray oblique |
---|
| 764 | |
---|
| 765 | E2_parl = Rindex2*E2_parl/Rindex1 - E1_parl; |
---|
| 766 | E2_perp = E2_perp - E1_perp; |
---|
| 767 | E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
| 768 | A_paral = NewMomentum.cross(A_trans); |
---|
| 769 | A_paral = A_paral.unit(); |
---|
| 770 | E2_abs = std::sqrt(E2_total); |
---|
| 771 | C_parl = E2_parl/E2_abs; |
---|
| 772 | C_perp = E2_perp/E2_abs; |
---|
| 773 | |
---|
| 774 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
| 775 | |
---|
| 776 | } |
---|
| 777 | |
---|
| 778 | else { // incident ray perpendicular |
---|
| 779 | |
---|
| 780 | if (Rindex2 > Rindex1) { |
---|
| 781 | NewPolarization = - OldPolarization; |
---|
| 782 | } |
---|
| 783 | else { |
---|
| 784 | NewPolarization = OldPolarization; |
---|
| 785 | } |
---|
| 786 | |
---|
| 787 | } |
---|
| 788 | } |
---|
| 789 | } |
---|
| 790 | else { // photon gets transmitted |
---|
| 791 | |
---|
| 792 | // Simulate transmission/refraction |
---|
| 793 | |
---|
| 794 | Inside = !Inside; |
---|
| 795 | Through = true; |
---|
| 796 | theStatus = FresnelRefraction; |
---|
| 797 | |
---|
| 798 | if (sint1 > 0.0) { // incident ray oblique |
---|
| 799 | |
---|
| 800 | G4double alpha = cost1 - cost2*(Rindex2/Rindex1); |
---|
| 801 | NewMomentum = OldMomentum + alpha*theFacetNormal; |
---|
| 802 | NewMomentum = NewMomentum.unit(); |
---|
| 803 | PdotN = -cost2; |
---|
| 804 | A_paral = NewMomentum.cross(A_trans); |
---|
| 805 | A_paral = A_paral.unit(); |
---|
| 806 | E2_abs = std::sqrt(E2_total); |
---|
| 807 | C_parl = E2_parl/E2_abs; |
---|
| 808 | C_perp = E2_perp/E2_abs; |
---|
| 809 | |
---|
| 810 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
| 811 | |
---|
| 812 | } |
---|
| 813 | else { // incident ray perpendicular |
---|
| 814 | |
---|
| 815 | NewMomentum = OldMomentum; |
---|
| 816 | NewPolarization = OldPolarization; |
---|
| 817 | |
---|
| 818 | } |
---|
| 819 | } |
---|
| 820 | } |
---|
| 821 | |
---|
| 822 | OldMomentum = NewMomentum.unit(); |
---|
| 823 | OldPolarization = NewPolarization.unit(); |
---|
| 824 | |
---|
| 825 | if (theStatus == FresnelRefraction) { |
---|
| 826 | Done = (NewMomentum * theGlobalNormal <= 0.0); |
---|
| 827 | } |
---|
| 828 | else { |
---|
| 829 | Done = (NewMomentum * theGlobalNormal >= 0.0); |
---|
| 830 | } |
---|
| 831 | |
---|
| 832 | } while (!Done); |
---|
| 833 | |
---|
| 834 | if (Inside && !Swap) { |
---|
| 835 | if( theFinish == polishedbackpainted || |
---|
| 836 | theFinish == groundbackpainted ) { |
---|
| 837 | |
---|
| 838 | if( !G4BooleanRand(theReflectivity) ) { |
---|
| 839 | DoAbsorption(); |
---|
| 840 | } |
---|
| 841 | else { |
---|
| 842 | if (theStatus != FresnelRefraction ) { |
---|
| 843 | theGlobalNormal = -theGlobalNormal; |
---|
| 844 | } |
---|
| 845 | else { |
---|
| 846 | Swap = !Swap; |
---|
[963] | 847 | G4SwapPtr(Material1,Material2); |
---|
| 848 | G4SwapObj(&Rindex1,&Rindex2); |
---|
[819] | 849 | } |
---|
| 850 | if ( theFinish == groundbackpainted ) |
---|
| 851 | theStatus = LambertianReflection; |
---|
| 852 | |
---|
| 853 | DoReflection(); |
---|
| 854 | |
---|
| 855 | theGlobalNormal = -theGlobalNormal; |
---|
| 856 | OldMomentum = NewMomentum; |
---|
| 857 | |
---|
| 858 | goto leap; |
---|
| 859 | } |
---|
| 860 | } |
---|
| 861 | } |
---|
| 862 | } |
---|
| 863 | |
---|
| 864 | // GetMeanFreePath |
---|
| 865 | // --------------- |
---|
| 866 | // |
---|
| 867 | G4double G4OpBoundaryProcess::GetMeanFreePath(const G4Track& , |
---|
| 868 | G4double , |
---|
| 869 | G4ForceCondition* condition) |
---|
| 870 | { |
---|
| 871 | *condition = Forced; |
---|
| 872 | |
---|
| 873 | return DBL_MAX; |
---|
| 874 | } |
---|
| 875 | |
---|
| 876 | G4double G4OpBoundaryProcess::GetIncidentAngle() |
---|
| 877 | { |
---|
| 878 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 879 | G4double magP= OldMomentum.mag(); |
---|
| 880 | G4double magN= theFacetNormal.mag(); |
---|
| 881 | G4double incidentangle = pi - std::acos(PdotN/(magP*magN)); |
---|
| 882 | |
---|
| 883 | return incidentangle; |
---|
| 884 | } |
---|
| 885 | |
---|
| 886 | G4double G4OpBoundaryProcess::GetReflectivity(G4double E1_perp, |
---|
| 887 | G4double E1_parl, |
---|
| 888 | G4double incidentangle, |
---|
| 889 | G4double RealRindex, |
---|
| 890 | G4double ImaginaryRindex) |
---|
| 891 | { |
---|
| 892 | |
---|
| 893 | G4complex Reflectivity, Reflectivity_TE, Reflectivity_TM; |
---|
| 894 | G4complex N(RealRindex, ImaginaryRindex); |
---|
| 895 | G4complex CosPhi; |
---|
| 896 | |
---|
| 897 | G4complex u(1,0); //unit number 1 |
---|
| 898 | |
---|
| 899 | G4complex numeratorTE; // E1_perp=1 E1_parl=0 -> TE polarization |
---|
| 900 | G4complex numeratorTM; // E1_parl=1 E1_perp=0 -> TM polarization |
---|
| 901 | G4complex denominatorTE, denominatorTM; |
---|
| 902 | G4complex rTM, rTE; |
---|
| 903 | |
---|
| 904 | // Following two equations, rTM and rTE, are from: "Introduction To Modern |
---|
| 905 | // Optics" written by Fowles |
---|
| 906 | |
---|
| 907 | CosPhi=std::sqrt(u-((std::sin(incidentangle)*std::sin(incidentangle))/(N*N))); |
---|
| 908 | |
---|
| 909 | numeratorTE = std::cos(incidentangle) - N*CosPhi; |
---|
| 910 | denominatorTE = std::cos(incidentangle) + N*CosPhi; |
---|
| 911 | rTE = numeratorTE/denominatorTE; |
---|
| 912 | |
---|
| 913 | numeratorTM = N*std::cos(incidentangle) - CosPhi; |
---|
| 914 | denominatorTM = N*std::cos(incidentangle) + CosPhi; |
---|
| 915 | rTM = numeratorTM/denominatorTM; |
---|
| 916 | |
---|
| 917 | // This is my calculaton for reflectivity on a metalic surface |
---|
| 918 | // depending on the fraction of TE and TM polarization |
---|
| 919 | // when TE polarization, E1_parl=0 and E1_perp=1, R=abs(rTE)^2 and |
---|
| 920 | // when TM polarization, E1_parl=1 and E1_perp=0, R=abs(rTM)^2 |
---|
| 921 | |
---|
| 922 | Reflectivity_TE = (rTE*conj(rTE))*(E1_perp*E1_perp) |
---|
| 923 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
| 924 | Reflectivity_TM = (rTM*conj(rTM))*(E1_parl*E1_parl) |
---|
| 925 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
| 926 | Reflectivity = Reflectivity_TE + Reflectivity_TM; |
---|
| 927 | |
---|
| 928 | do { |
---|
[1055] | 929 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TE)) |
---|
| 930 | {iTE = -1;}else{iTE = 1;} |
---|
| 931 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TM)) |
---|
| 932 | {iTM = -1;}else{iTM = 1;} |
---|
[819] | 933 | } while(iTE<0&&iTM<0); |
---|
| 934 | |
---|
| 935 | return real(Reflectivity); |
---|
| 936 | |
---|
| 937 | } |
---|
[1055] | 938 | |
---|
| 939 | void G4OpBoundaryProcess::CalculateReflectivity() |
---|
| 940 | { |
---|
| 941 | G4double RealRindex = |
---|
| 942 | PropertyPointer1->GetProperty(thePhotonMomentum); |
---|
| 943 | G4double ImaginaryRindex = |
---|
| 944 | PropertyPointer2->GetProperty(thePhotonMomentum); |
---|
| 945 | |
---|
| 946 | // calculate FacetNormal |
---|
| 947 | if ( theFinish == ground ) { |
---|
| 948 | theFacetNormal = |
---|
| 949 | GetFacetNormal(OldMomentum, theGlobalNormal); |
---|
| 950 | } else { |
---|
| 951 | theFacetNormal = theGlobalNormal; |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 955 | cost1 = -PdotN; |
---|
| 956 | |
---|
| 957 | if (std::abs(cost1) < 1.0 - kCarTolerance) { |
---|
| 958 | sint1 = std::sqrt(1. - cost1*cost1); |
---|
| 959 | } else { |
---|
| 960 | sint1 = 0.0; |
---|
| 961 | } |
---|
| 962 | |
---|
| 963 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
| 964 | G4double E1_perp, E1_parl; |
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| 965 | |
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| 966 | if (sint1 > 0.0 ) { |
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| 967 | A_trans = OldMomentum.cross(theFacetNormal); |
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| 968 | A_trans = A_trans.unit(); |
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| 969 | E1_perp = OldPolarization * A_trans; |
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| 970 | E1pp = E1_perp * A_trans; |
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| 971 | E1pl = OldPolarization - E1pp; |
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| 972 | E1_parl = E1pl.mag(); |
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| 973 | } |
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| 974 | else { |
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| 975 | A_trans = OldPolarization; |
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| 976 | // Here we Follow Jackson's conventions and we set the |
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| 977 | // parallel component = 1 in case of a ray perpendicular |
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| 978 | // to the surface |
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| 979 | E1_perp = 0.0; |
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| 980 | E1_parl = 1.0; |
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| 981 | } |
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| 982 | |
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| 983 | //calculate incident angle |
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| 984 | G4double incidentangle = GetIncidentAngle(); |
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| 985 | |
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| 986 | //calculate the reflectivity depending on incident angle, |
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| 987 | //polarization and complex refractive |
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| 988 | |
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| 989 | theReflectivity = |
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| 990 | GetReflectivity(E1_perp, E1_parl, incidentangle, |
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| 991 | RealRindex, ImaginaryRindex); |
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| 992 | } |
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