[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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[1196] | 27 | // $Id: G4OpBoundaryProcess.hh,v 1.22 2009/11/20 01:06:45 gum Exp $ |
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[1228] | 28 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 29 | // |
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| 30 | // |
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| 31 | //////////////////////////////////////////////////////////////////////// |
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| 32 | // Optical Photon Boundary Process Class Definition |
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| 33 | //////////////////////////////////////////////////////////////////////// |
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| 34 | // |
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| 35 | // File: G4OpBoundaryProcess.hh |
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| 36 | // Description: Discrete Process -- reflection/refraction at |
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| 37 | // optical interfaces |
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| 38 | // Version: 1.1 |
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| 39 | // Created: 1997-06-18 |
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| 40 | // Modified: 2005-07-28 add G4ProcessType to constructor |
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| 41 | // 1999-10-29 add method and class descriptors |
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| 42 | // 1999-10-10 - Fill NewMomentum/NewPolarization in |
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| 43 | // DoAbsorption. These members need to be |
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| 44 | // filled since DoIt calls |
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| 45 | // aParticleChange.SetMomentumChange etc. |
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| 46 | // upon return (thanks to: Clark McGrew) |
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| 47 | // 2006-11-04 - add capability of calculating the reflectivity |
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| 48 | // off a metal surface by way of a complex index |
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| 49 | // of refraction - Thanks to Sehwook Lee and John |
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| 50 | // Hauptman (Dept. of Physics - Iowa State Univ.) |
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[1196] | 51 | // 2009-11-10 - add capability of simulating surface reflections |
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| 52 | // with Look-Up-Tables (LUT) containing measured |
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| 53 | // optical reflectance for a variety of surface |
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| 54 | // treatments - Thanks to Martin Janecek and |
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| 55 | // William Moses (Lawrence Berkeley National Lab.) |
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[819] | 56 | // |
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| 57 | // Author: Peter Gumplinger |
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| 58 | // adopted from work by Werner Keil - April 2/96 |
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| 59 | // mail: gum@triumf.ca |
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| 60 | // |
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| 61 | //////////////////////////////////////////////////////////////////////// |
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| 62 | |
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| 63 | #ifndef G4OpBoundaryProcess_h |
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| 64 | #define G4OpBoundaryProcess_h 1 |
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| 65 | |
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| 66 | ///////////// |
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| 67 | // Includes |
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| 68 | ///////////// |
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| 69 | |
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| 70 | #include "globals.hh" |
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| 71 | #include "templates.hh" |
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| 72 | #include "geomdefs.hh" |
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| 73 | #include "Randomize.hh" |
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[963] | 74 | |
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| 75 | #include "G4RandomTools.hh" |
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| 76 | #include "G4RandomDirection.hh" |
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| 77 | |
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[819] | 78 | #include "G4Step.hh" |
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| 79 | #include "G4VDiscreteProcess.hh" |
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| 80 | #include "G4DynamicParticle.hh" |
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| 81 | #include "G4Material.hh" |
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| 82 | #include "G4LogicalBorderSurface.hh" |
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| 83 | #include "G4LogicalSkinSurface.hh" |
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| 84 | #include "G4OpticalSurface.hh" |
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| 85 | #include "G4OpticalPhoton.hh" |
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| 86 | #include "G4TransportationManager.hh" |
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| 87 | |
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| 88 | // Class Description: |
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| 89 | // Discrete Process -- reflection/refraction at optical interfaces. |
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| 90 | // Class inherits publicly from G4VDiscreteProcess. |
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| 91 | // Class Description - End: |
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| 92 | |
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| 93 | ///////////////////// |
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| 94 | // Class Definition |
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| 95 | ///////////////////// |
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| 96 | |
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| 97 | enum G4OpBoundaryProcessStatus { Undefined, |
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| 98 | FresnelRefraction, FresnelReflection, |
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| 99 | TotalInternalReflection, |
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| 100 | LambertianReflection, LobeReflection, |
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| 101 | SpikeReflection, BackScattering, |
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| 102 | Absorption, Detection, NotAtBoundary, |
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[1196] | 103 | SameMaterial, StepTooSmall, NoRINDEX, |
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| 104 | PolishedLumirrorAirReflection, |
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| 105 | PolishedLumirrorGlueReflection, |
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| 106 | PolishedAirReflection, |
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| 107 | PolishedTeflonAirReflection, |
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| 108 | PolishedTiOAirReflection, |
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| 109 | PolishedTyvekAirReflection, |
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| 110 | PolishedVM2000AirReflection, |
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| 111 | PolishedVM2000GlueReflection, |
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| 112 | EtchedLumirrorAirReflection, |
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| 113 | EtchedLumirrorGlueReflection, |
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| 114 | EtchedAirReflection, |
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| 115 | EtchedTeflonAirReflection, |
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| 116 | EtchedTiOAirReflection, |
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| 117 | EtchedTyvekAirReflection, |
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| 118 | EtchedVM2000AirReflection, |
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| 119 | EtchedVM2000GlueReflection, |
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| 120 | GroundLumirrorAirReflection, |
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| 121 | GroundLumirrorGlueReflection, |
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| 122 | GroundAirReflection, |
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| 123 | GroundTeflonAirReflection, |
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| 124 | GroundTiOAirReflection, |
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| 125 | GroundTyvekAirReflection, |
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| 126 | GroundVM2000AirReflection, |
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| 127 | GroundVM2000GlueReflection }; |
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[819] | 128 | |
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| 129 | class G4OpBoundaryProcess : public G4VDiscreteProcess |
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| 130 | { |
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| 131 | |
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| 132 | private: |
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| 133 | |
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| 134 | ////////////// |
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| 135 | // Operators |
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| 136 | ////////////// |
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| 137 | |
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| 138 | // G4OpBoundaryProcess& operator=(const G4OpBoundaryProcess &right); |
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| 139 | |
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| 140 | // G4OpBoundaryProcess(const G4OpBoundaryProcess &right); |
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| 141 | |
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| 142 | public: // Without description |
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| 143 | |
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| 144 | //////////////////////////////// |
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| 145 | // Constructors and Destructor |
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| 146 | //////////////////////////////// |
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| 147 | |
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| 148 | G4OpBoundaryProcess(const G4String& processName = "OpBoundary", |
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| 149 | G4ProcessType type = fOptical); |
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| 150 | |
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| 151 | ~G4OpBoundaryProcess(); |
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| 152 | |
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| 153 | //////////// |
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| 154 | // Methods |
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| 155 | //////////// |
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| 156 | |
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| 157 | public: // With description |
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| 158 | |
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| 159 | G4bool IsApplicable(const G4ParticleDefinition& aParticleType); |
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| 160 | // Returns true -> 'is applicable' only for an optical photon. |
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| 161 | |
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| 162 | G4double GetMeanFreePath(const G4Track& , |
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| 163 | G4double , |
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| 164 | G4ForceCondition* condition); |
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| 165 | // Returns infinity; i. e. the process does not limit the step, |
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| 166 | // but sets the 'Forced' condition for the DoIt to be invoked at |
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| 167 | // every step. However, only at a boundary will any action be |
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| 168 | // taken. |
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| 169 | |
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| 170 | G4VParticleChange* PostStepDoIt(const G4Track& aTrack, |
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| 171 | const G4Step& aStep); |
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| 172 | // This is the method implementing boundary processes. |
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| 173 | |
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| 174 | G4OpticalSurfaceModel GetModel() const; |
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| 175 | // Returns the optical surface mode. |
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| 176 | |
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| 177 | G4OpBoundaryProcessStatus GetStatus() const; |
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| 178 | // Returns the current status. |
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| 179 | |
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[1055] | 180 | void SetModel(G4OpticalSurfaceModel model); |
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[819] | 181 | // Set the optical surface model to be followed |
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[1196] | 182 | // (glisur || unified || LUT). |
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[819] | 183 | |
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| 184 | private: |
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| 185 | |
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| 186 | G4bool G4BooleanRand(const G4double prob) const; |
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| 187 | |
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| 188 | G4ThreeVector GetFacetNormal(const G4ThreeVector& Momentum, |
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| 189 | const G4ThreeVector& Normal) const; |
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| 190 | |
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| 191 | void DielectricMetal(); |
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| 192 | void DielectricDielectric(); |
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[1196] | 193 | void DielectricLUT(); |
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[819] | 194 | |
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| 195 | void ChooseReflection(); |
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| 196 | void DoAbsorption(); |
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| 197 | void DoReflection(); |
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| 198 | |
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[1196] | 199 | G4double GetIncidentAngle(); |
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| 200 | // Returns the incident angle of optical photon |
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| 201 | |
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| 202 | G4double GetReflectivity(G4double E1_perp, |
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| 203 | G4double E1_parl, |
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| 204 | G4double incidentangle, |
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| 205 | G4double RealRindex, |
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| 206 | G4double ImaginaryRindex); |
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| 207 | // Returns the Reflectivity on a metalic surface |
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| 208 | |
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| 209 | void CalculateReflectivity(void); |
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| 210 | |
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| 211 | void BoundaryProcessVerbose(void) const; |
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| 212 | |
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[819] | 213 | private: |
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| 214 | |
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| 215 | G4double thePhotonMomentum; |
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| 216 | |
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| 217 | G4ThreeVector OldMomentum; |
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| 218 | G4ThreeVector OldPolarization; |
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| 219 | |
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| 220 | G4ThreeVector NewMomentum; |
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| 221 | G4ThreeVector NewPolarization; |
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| 222 | |
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| 223 | G4ThreeVector theGlobalNormal; |
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| 224 | G4ThreeVector theFacetNormal; |
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| 225 | |
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| 226 | G4Material* Material1; |
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| 227 | G4Material* Material2; |
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| 228 | |
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| 229 | G4OpticalSurface* OpticalSurface; |
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| 230 | |
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[1055] | 231 | G4MaterialPropertyVector* PropertyPointer; |
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| 232 | G4MaterialPropertyVector* PropertyPointer1; |
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| 233 | G4MaterialPropertyVector* PropertyPointer2; |
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| 234 | |
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[819] | 235 | G4double Rindex1; |
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| 236 | G4double Rindex2; |
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| 237 | |
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| 238 | G4double cost1, cost2, sint1, sint2; |
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| 239 | |
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| 240 | G4OpBoundaryProcessStatus theStatus; |
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| 241 | |
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| 242 | G4OpticalSurfaceModel theModel; |
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| 243 | |
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| 244 | G4OpticalSurfaceFinish theFinish; |
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| 245 | |
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| 246 | G4double theReflectivity; |
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| 247 | G4double theEfficiency; |
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| 248 | G4double prob_sl, prob_ss, prob_bs; |
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| 249 | |
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| 250 | G4int iTE, iTM; |
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| 251 | |
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| 252 | G4double kCarTolerance; |
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[1196] | 253 | |
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[819] | 254 | }; |
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| 255 | |
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| 256 | //////////////////// |
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| 257 | // Inline methods |
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| 258 | //////////////////// |
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| 259 | |
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| 260 | inline |
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| 261 | G4bool G4OpBoundaryProcess::G4BooleanRand(const G4double prob) const |
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| 262 | { |
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| 263 | /* Returns a random boolean variable with the specified probability */ |
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| 264 | |
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| 265 | return (G4UniformRand() < prob); |
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| 266 | } |
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| 267 | |
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| 268 | inline |
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| 269 | G4bool G4OpBoundaryProcess::IsApplicable(const G4ParticleDefinition& |
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| 270 | aParticleType) |
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| 271 | { |
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| 272 | return ( &aParticleType == G4OpticalPhoton::OpticalPhoton() ); |
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| 273 | } |
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| 274 | |
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| 275 | inline |
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| 276 | G4OpticalSurfaceModel G4OpBoundaryProcess::GetModel() const |
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| 277 | { |
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| 278 | return theModel; |
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| 279 | } |
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| 280 | |
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| 281 | inline |
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| 282 | G4OpBoundaryProcessStatus G4OpBoundaryProcess::GetStatus() const |
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| 283 | { |
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| 284 | return theStatus; |
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| 285 | } |
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| 286 | |
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| 287 | inline |
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| 288 | void G4OpBoundaryProcess::SetModel(G4OpticalSurfaceModel model) |
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| 289 | { |
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| 290 | theModel = model; |
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| 291 | } |
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| 292 | |
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| 293 | inline |
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| 294 | void G4OpBoundaryProcess::ChooseReflection() |
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| 295 | { |
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| 296 | G4double rand = G4UniformRand(); |
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| 297 | if ( rand >= 0.0 && rand < prob_ss ) { |
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| 298 | theStatus = SpikeReflection; |
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| 299 | theFacetNormal = theGlobalNormal; |
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| 300 | } |
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| 301 | else if ( rand >= prob_ss && |
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| 302 | rand <= prob_ss+prob_sl) { |
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| 303 | theStatus = LobeReflection; |
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| 304 | } |
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| 305 | else if ( rand > prob_ss+prob_sl && |
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| 306 | rand < prob_ss+prob_sl+prob_bs ) { |
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| 307 | theStatus = BackScattering; |
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| 308 | } |
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| 309 | else { |
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| 310 | theStatus = LambertianReflection; |
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| 311 | } |
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| 312 | } |
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| 313 | |
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| 314 | inline |
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| 315 | void G4OpBoundaryProcess::DoAbsorption() |
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| 316 | { |
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| 317 | theStatus = Absorption; |
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| 318 | |
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| 319 | if ( G4BooleanRand(theEfficiency) ) { |
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| 320 | |
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| 321 | // EnergyDeposited =/= 0 means: photon has been detected |
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| 322 | theStatus = Detection; |
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| 323 | aParticleChange.ProposeLocalEnergyDeposit(thePhotonMomentum); |
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| 324 | } |
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| 325 | else { |
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| 326 | aParticleChange.ProposeLocalEnergyDeposit(0.0); |
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| 327 | } |
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| 328 | |
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| 329 | NewMomentum = OldMomentum; |
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| 330 | NewPolarization = OldPolarization; |
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| 331 | |
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| 332 | // aParticleChange.ProposeEnergy(0.0); |
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| 333 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 334 | } |
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| 335 | |
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| 336 | inline |
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| 337 | void G4OpBoundaryProcess::DoReflection() |
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| 338 | { |
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| 339 | if ( theStatus == LambertianReflection ) { |
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| 340 | |
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| 341 | NewMomentum = G4LambertianRand(theGlobalNormal); |
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| 342 | theFacetNormal = (NewMomentum - OldMomentum).unit(); |
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| 343 | |
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| 344 | } |
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| 345 | else if ( theFinish == ground ) { |
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| 346 | |
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| 347 | theStatus = LobeReflection; |
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[1055] | 348 | if ( PropertyPointer1 && PropertyPointer2 ){ |
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| 349 | } else { |
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| 350 | theFacetNormal = |
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| 351 | GetFacetNormal(OldMomentum,theGlobalNormal); |
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| 352 | } |
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[819] | 353 | G4double PdotN = OldMomentum * theFacetNormal; |
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| 354 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
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| 355 | |
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| 356 | } |
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| 357 | else { |
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| 358 | |
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| 359 | theStatus = SpikeReflection; |
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| 360 | theFacetNormal = theGlobalNormal; |
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| 361 | G4double PdotN = OldMomentum * theFacetNormal; |
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| 362 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
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| 363 | |
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| 364 | } |
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| 365 | G4double EdotN = OldPolarization * theFacetNormal; |
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| 366 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
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| 367 | } |
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| 368 | |
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| 369 | #endif /* G4OpBoundaryProcess_h */ |
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