1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4FastStep.cc,v 1.16 2006/06/29 21:09:32 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | //--------------------------------------------------------------- |
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31 | // |
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32 | // G4FastStep.cc |
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33 | // |
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34 | // Description: |
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35 | // Encapsulates a G4ParticleChange and insure friendly interface |
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36 | // methods to manage the primary/secondaries final state for |
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37 | // Fast Simulation Models. |
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38 | // |
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39 | // History: |
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40 | // Oct 97: Verderi && MoraDeFreitas - First Implementation. |
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41 | // Apr 98: MoraDeFreitas - G4FastStep becomes the G4ParticleChange |
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42 | // for the Fast Simulation Process. |
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43 | // |
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44 | //--------------------------------------------------------------- |
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45 | |
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46 | #include "G4FastStep.hh" |
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47 | #include "G4Track.hh" |
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48 | #include "G4Step.hh" |
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49 | #include "G4TrackFastVector.hh" |
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50 | #include "G4DynamicParticle.hh" |
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51 | |
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52 | void G4FastStep::Initialize(const G4FastTrack& fastTrack) |
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53 | { |
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54 | // keeps the fastTrack reference |
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55 | fFastTrack=&fastTrack; |
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56 | |
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57 | // currentTrack will be used to Initialize the other data members |
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58 | const G4Track& currentTrack = *(fFastTrack->GetPrimaryTrack()); |
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59 | |
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60 | // use base class's method at first |
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61 | G4VParticleChange::Initialize(currentTrack); |
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62 | |
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63 | // set Energy/Momentum etc. equal to those of the parent particle |
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64 | const G4DynamicParticle* pParticle = currentTrack.GetDynamicParticle(); |
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65 | theEnergyChange = pParticle->GetKineticEnergy(); |
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66 | theMomentumChange = pParticle->GetMomentumDirection(); |
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67 | thePolarizationChange = pParticle->GetPolarization(); |
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68 | theProperTimeChange = pParticle->GetProperTime(); |
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69 | |
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70 | // set Position/Time etc. equal to those of the parent track |
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71 | thePositionChange = currentTrack.GetPosition(); |
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72 | theTimeChange = currentTrack.GetGlobalTime(); |
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73 | |
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74 | // switch off stepping hit invokation by default: |
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75 | theSteppingControlFlag = AvoidHitInvocation; |
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76 | |
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77 | // event biasing weigth: |
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78 | theWeightChange = currentTrack.GetWeight(); |
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79 | } |
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80 | |
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81 | //---------------------------------------- |
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82 | // -- Set the StopAndKilled signal |
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83 | // -- and put kinetic energy to 0.0. in the |
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84 | // -- G4ParticleChange. |
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85 | //---------------------------------------- |
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86 | void G4FastStep::KillPrimaryTrack() |
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87 | { |
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88 | SetPrimaryTrackFinalKineticEnergy(0.) ; |
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89 | ProposeTrackStatus(fStopAndKill) ; |
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90 | } |
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91 | |
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92 | //-------------------- |
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93 | // |
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94 | //-------------------- |
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95 | void |
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96 | G4FastStep:: |
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97 | ProposePrimaryTrackFinalPosition(const G4ThreeVector &position, |
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98 | G4bool localCoordinates) |
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99 | { |
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100 | // Compute the position coordinate in global |
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101 | // reference system if needed ... |
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102 | G4ThreeVector globalPosition = position; |
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103 | if (localCoordinates) |
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104 | globalPosition = fFastTrack->GetInverseAffineTransformation()-> |
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105 | TransformPoint(position); |
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106 | // ...and feed the globalPosition: |
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107 | thePositionChange = globalPosition; |
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108 | } |
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109 | |
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110 | void |
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111 | G4FastStep:: |
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112 | SetPrimaryTrackFinalPosition(const G4ThreeVector &position, |
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113 | G4bool localCoordinates) |
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114 | { |
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115 | ProposePrimaryTrackFinalPosition(position, localCoordinates); |
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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 | //-------------------- |
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121 | void |
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122 | G4FastStep:: |
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123 | ProposePrimaryTrackFinalMomentumDirection(const G4ThreeVector &momentum, |
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124 | G4bool localCoordinates) |
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125 | { |
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126 | // Compute the momentum in global reference |
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127 | // system if needed ... |
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128 | G4ThreeVector globalMomentum = momentum; |
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129 | if (localCoordinates) |
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130 | globalMomentum = fFastTrack->GetInverseAffineTransformation()-> |
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131 | TransformAxis(momentum); |
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132 | // ...and feed the globalMomentum (ensuring unitarity) |
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133 | SetMomentumChange(globalMomentum.unit()); |
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134 | } |
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135 | |
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136 | void |
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137 | G4FastStep:: |
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138 | SetPrimaryTrackFinalMomentum(const G4ThreeVector &momentum, |
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139 | G4bool localCoordinates) |
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140 | { |
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141 | ProposePrimaryTrackFinalMomentumDirection(momentum, localCoordinates); |
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142 | } |
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143 | |
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144 | //-------------------- |
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145 | // |
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146 | //-------------------- |
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147 | void |
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148 | G4FastStep:: |
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149 | ProposePrimaryTrackFinalKineticEnergyAndDirection(G4double kineticEnergy, |
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150 | const G4ThreeVector &direction, |
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151 | G4bool localCoordinates) |
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152 | { |
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153 | // Compute global direction if needed... |
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154 | G4ThreeVector globalDirection = direction; |
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155 | if (localCoordinates) |
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156 | globalDirection =fFastTrack->GetInverseAffineTransformation()-> |
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157 | TransformAxis(direction); |
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158 | // ...and feed the globalMomentum (ensuring unitarity) |
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159 | SetMomentumChange(globalDirection.unit()); |
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160 | SetPrimaryTrackFinalKineticEnergy(kineticEnergy); |
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161 | } |
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162 | |
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163 | void |
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164 | G4FastStep:: |
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165 | SetPrimaryTrackFinalKineticEnergyAndDirection(G4double kineticEnergy, |
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166 | const G4ThreeVector &direction, |
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167 | G4bool localCoordinates) |
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168 | { |
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169 | ProposePrimaryTrackFinalKineticEnergyAndDirection(kineticEnergy, direction, localCoordinates); |
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170 | } |
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171 | |
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172 | //-------------------- |
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173 | // |
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174 | //-------------------- |
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175 | void |
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176 | G4FastStep:: |
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177 | ProposePrimaryTrackFinalPolarization(const G4ThreeVector &polarization, |
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178 | G4bool localCoordinates) |
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179 | { |
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180 | // Compute polarization in global system if needed: |
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181 | G4ThreeVector globalPolarization(polarization); |
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182 | if (localCoordinates) |
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183 | globalPolarization = fFastTrack->GetInverseAffineTransformation()-> |
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184 | TransformAxis(globalPolarization); |
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185 | // Feed the particle globalPolarization: |
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186 | thePolarizationChange = globalPolarization; |
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187 | } |
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188 | |
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189 | void |
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190 | G4FastStep:: |
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191 | SetPrimaryTrackFinalPolarization(const G4ThreeVector &polarization, |
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192 | G4bool localCoordinates) |
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193 | { |
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194 | ProposePrimaryTrackFinalPolarization(polarization, localCoordinates); |
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195 | } |
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196 | |
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197 | //-------------------- |
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198 | // |
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199 | //-------------------- |
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200 | G4Track* G4FastStep:: |
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201 | CreateSecondaryTrack(const G4DynamicParticle& dynamics, |
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202 | G4ThreeVector polarization, |
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203 | G4ThreeVector position, |
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204 | G4double time, |
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205 | G4bool localCoordinates ) |
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206 | { |
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207 | G4DynamicParticle dummyDynamics(dynamics); |
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208 | |
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209 | // ------------------------------------------ |
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210 | // Add the polarization to the dummyDynamics: |
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211 | // ------------------------------------------ |
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212 | dummyDynamics.SetPolarization(polarization.x(), |
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213 | polarization.y(), |
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214 | polarization.z()); |
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215 | |
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216 | return CreateSecondaryTrack(dummyDynamics, position, time, localCoordinates); |
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217 | } |
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218 | |
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219 | //-------------------- |
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220 | // |
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221 | //-------------------- |
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222 | G4Track* G4FastStep:: |
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223 | CreateSecondaryTrack(const G4DynamicParticle& dynamics, |
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224 | G4ThreeVector position, |
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225 | G4double time, |
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226 | G4bool localCoordinates ) |
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227 | { |
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228 | // ---------------------------------------- |
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229 | // Quantities in global coordinates system. |
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230 | // |
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231 | // The allocated globalDynamics is deleted |
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232 | // by the destructor of the G4Track. |
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233 | // ---------------------------------------- |
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234 | G4DynamicParticle* globalDynamics = |
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235 | new G4DynamicParticle(dynamics); |
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236 | G4ThreeVector globalPosition(position); |
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237 | |
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238 | // ----------------------------------- |
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239 | // Convert to global system if needed: |
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240 | // ----------------------------------- |
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241 | if (localCoordinates) |
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242 | { |
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243 | // -- Momentum Direction: |
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244 | globalDynamics->SetMomentumDirection(fFastTrack-> |
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245 | GetInverseAffineTransformation()-> |
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246 | TransformAxis(globalDynamics-> |
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247 | GetMomentumDirection())); |
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248 | // -- Polarization: |
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249 | G4ThreeVector globalPolarization; |
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250 | globalPolarization = fFastTrack->GetInverseAffineTransformation()-> |
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251 | TransformAxis(globalDynamics->GetPolarization()); |
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252 | globalDynamics->SetPolarization( |
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253 | globalPolarization.x(), |
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254 | globalPolarization.y(), |
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255 | globalPolarization.z() |
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256 | ); |
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257 | |
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258 | // -- Position: |
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259 | globalPosition = fFastTrack->GetInverseAffineTransformation()-> |
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260 | TransformPoint(globalPosition); |
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261 | } |
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262 | |
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263 | //------------------------------------- |
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264 | // Create the G4Track of the secondary: |
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265 | //------------------------------------- |
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266 | G4Track* secondary = new G4Track( |
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267 | globalDynamics, |
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268 | time, |
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269 | globalPosition |
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270 | ); |
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271 | |
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272 | //------------------------------- |
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273 | // and feed the changes: |
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274 | //------------------------------- |
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275 | AddSecondary(secondary); |
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276 | |
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277 | //-------------------------------------- |
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278 | // returns the pointer on the secondary: |
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279 | //-------------------------------------- |
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280 | return secondary; |
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281 | } |
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282 | |
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283 | // G4FastStep should never be Initialized in this way |
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284 | // but we must define it to avoid warnings. |
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285 | void G4FastStep::Initialize(const G4Track&) |
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286 | { |
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287 | G4Exception("G4FastStep::Initialize()", "InvalidCondition", FatalException, |
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288 | "G4FastStep can be initialised only through G4FastTrack!"); |
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289 | } |
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290 | |
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291 | G4FastStep::G4FastStep() |
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292 | : G4VParticleChange() |
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293 | { |
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294 | if (verboseLevel>2) |
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295 | { |
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296 | G4cerr << "G4FastStep::G4FastStep() " << G4endl; |
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297 | } |
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298 | } |
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299 | |
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300 | G4FastStep::~G4FastStep() |
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301 | { |
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302 | if (verboseLevel>2) |
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303 | { |
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304 | G4cerr << "G4FastStep::~G4FastStep() " << G4endl; |
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305 | } |
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306 | } |
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307 | |
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308 | // copy and assignment operators are implemented as "shallow copy" |
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309 | G4FastStep::G4FastStep(const G4FastStep &right) |
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310 | : G4VParticleChange() |
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311 | { |
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312 | *this = right; |
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313 | } |
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314 | |
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315 | |
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316 | G4FastStep & G4FastStep::operator=(const G4FastStep &right) |
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317 | { |
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318 | if (this != &right) |
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319 | { |
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320 | G4VParticleChange::operator=(right); |
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321 | theListOfSecondaries = right.theListOfSecondaries; |
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322 | theSizeOftheListOfSecondaries = right.theSizeOftheListOfSecondaries; |
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323 | theNumberOfSecondaries = right.theNumberOfSecondaries; |
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324 | theStatusChange = right.theStatusChange; |
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325 | theMomentumChange = right.theMomentumChange; |
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326 | thePolarizationChange = right.thePolarizationChange; |
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327 | thePositionChange = right.thePositionChange; |
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328 | theTimeChange = right.theTimeChange; |
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329 | theEnergyChange = right.theEnergyChange; |
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330 | theTrueStepLength = right.theTrueStepLength; |
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331 | theLocalEnergyDeposit = right.theLocalEnergyDeposit; |
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332 | theSteppingControlFlag = right.theSteppingControlFlag; |
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333 | theWeightChange = right.theWeightChange; |
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334 | } |
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335 | return *this; |
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336 | } |
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337 | |
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338 | |
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339 | |
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340 | |
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341 | |
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342 | G4bool G4FastStep::operator==(const G4FastStep &right) const |
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343 | { |
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344 | return ((G4VParticleChange *)this == (G4VParticleChange *) &right); |
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345 | } |
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346 | |
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347 | G4bool G4FastStep::operator!=(const G4FastStep &right) const |
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348 | { |
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349 | return ((G4VParticleChange *)this != (G4VParticleChange *) &right); |
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350 | } |
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351 | |
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352 | //---------------------------------------------------------------- |
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353 | // methods for updating G4Step |
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354 | // |
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355 | |
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356 | G4Step* G4FastStep::UpdateStepForPostStep(G4Step* pStep) |
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357 | { |
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358 | // A physics process always calculates the final state of the particle |
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359 | |
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360 | // Take note that the return type of GetMomentumChange is a |
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361 | // pointer to G4ParticleMometum. Also it is a normalized |
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362 | // momentum vector. |
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363 | |
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364 | // G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint(); |
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365 | G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint(); |
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366 | G4Track* aTrack = pStep->GetTrack(); |
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367 | // G4double mass = aTrack->GetDynamicParticle()->GetMass(); |
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368 | |
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369 | // update kinetic energy and momentum direction |
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370 | pPostStepPoint->SetMomentumDirection(theMomentumChange); |
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371 | pPostStepPoint->SetKineticEnergy( theEnergyChange ); |
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372 | |
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373 | // update polarization |
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374 | pPostStepPoint->SetPolarization( thePolarizationChange ); |
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375 | |
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376 | // update position and time |
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377 | pPostStepPoint->SetPosition( thePositionChange ); |
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378 | pPostStepPoint->SetGlobalTime( theTimeChange ); |
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379 | pPostStepPoint->AddLocalTime( theTimeChange |
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380 | - aTrack->GetGlobalTime()); |
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381 | pPostStepPoint->SetProperTime( theProperTimeChange ); |
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382 | |
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383 | // update weight |
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384 | pPostStepPoint->SetWeight( theWeightChange ); |
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385 | |
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386 | if (debugFlag) CheckIt(*aTrack); |
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387 | |
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388 | |
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389 | // Update the G4Step specific attributes |
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390 | return UpdateStepInfo(pStep); |
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391 | } |
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392 | |
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393 | G4Step* G4FastStep::UpdateStepForAtRest(G4Step* pStep) |
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394 | { |
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395 | // A physics process always calculates the final state of the particle |
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396 | |
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397 | // G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint(); |
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398 | G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint(); |
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399 | G4Track* aTrack = pStep->GetTrack(); |
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400 | // G4double mass = aTrack->GetDynamicParticle()->GetMass(); |
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401 | |
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402 | // update kinetic energy and momentum direction |
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403 | pPostStepPoint->SetMomentumDirection(theMomentumChange); |
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404 | pPostStepPoint->SetKineticEnergy( theEnergyChange ); |
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405 | |
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406 | // update polarization |
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407 | pPostStepPoint->SetPolarization( thePolarizationChange ); |
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408 | |
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409 | // update position and time |
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410 | pPostStepPoint->SetPosition( thePositionChange ); |
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411 | pPostStepPoint->SetGlobalTime( theTimeChange ); |
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412 | pPostStepPoint->AddLocalTime( theTimeChange |
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413 | - aTrack->GetGlobalTime()); |
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414 | pPostStepPoint->SetProperTime( theProperTimeChange ); |
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415 | |
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416 | // update weight |
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417 | pPostStepPoint->SetWeight( theWeightChange ); |
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418 | |
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419 | if (debugFlag) CheckIt(*aTrack); |
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420 | |
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421 | // Update the G4Step specific attributes |
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422 | return UpdateStepInfo(pStep); |
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423 | } |
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424 | |
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425 | //---------------------------------------------------------------- |
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426 | // methods for printing messages |
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427 | // |
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428 | |
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429 | void G4FastStep::DumpInfo() const |
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430 | { |
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431 | // use base-class DumpInfo |
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432 | G4VParticleChange::DumpInfo(); |
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433 | |
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434 | G4cout.precision(3); |
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435 | G4cout << " Position - x (mm) : " |
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436 | << std::setw(20) << thePositionChange.x()/mm |
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437 | << G4endl; |
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438 | G4cout << " Position - y (mm) : " |
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439 | << std::setw(20) << thePositionChange.y()/mm |
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440 | << G4endl; |
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441 | G4cout << " Position - z (mm) : " |
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442 | << std::setw(20) << thePositionChange.z()/mm |
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443 | << G4endl; |
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444 | G4cout << " Time (ns) : " |
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445 | << std::setw(20) << theTimeChange/ns |
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446 | << G4endl; |
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447 | G4cout << " Proper Time (ns) : " |
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448 | << std::setw(20) << theProperTimeChange/ns |
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449 | << G4endl; |
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450 | G4cout << " Momentum Direct - x : " |
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451 | << std::setw(20) << theMomentumChange.x() |
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452 | << G4endl; |
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453 | G4cout << " Momentum Direct - y : " |
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454 | << std::setw(20) << theMomentumChange.y() |
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455 | << G4endl; |
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456 | G4cout << " Momentum Direct - z : " |
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457 | << std::setw(20) << theMomentumChange.z() |
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458 | << G4endl; |
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459 | G4cout << " Kinetic Energy (MeV): " |
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460 | << std::setw(20) << theEnergyChange/MeV |
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461 | << G4endl; |
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462 | G4cout << " Polarization - x : " |
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463 | << std::setw(20) << thePolarizationChange.x() |
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464 | << G4endl; |
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465 | G4cout << " Polarization - y : " |
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466 | << std::setw(20) << thePolarizationChange.y() |
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467 | << G4endl; |
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468 | G4cout << " Polarization - z : " |
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469 | << std::setw(20) << thePolarizationChange.z() |
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470 | << G4endl; |
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471 | } |
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472 | |
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473 | G4bool G4FastStep::CheckIt(const G4Track& aTrack) |
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474 | { |
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475 | // |
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476 | // In the G4FastStep::CheckIt |
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477 | // We only check a bit |
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478 | // |
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479 | // If the user violates the energy, |
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480 | // We don't care, we agree. |
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481 | // |
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482 | // But for theMomentumDirectionChange, |
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483 | // We do pay attention. |
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484 | // And if too large is its range, |
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485 | // We issue an Exception. |
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486 | // |
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487 | // |
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488 | // It means, the G4FastStep::CheckIt issues an exception only for the |
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489 | // theMomentumDirectionChange which should be an unit vector |
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490 | // and it corrects it because it could cause problems for the ulterior |
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491 | // tracking.For the rest, only warning are issued. |
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492 | |
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493 | G4bool itsOK = true; |
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494 | G4bool exitWithError = false; |
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495 | G4double accuracy; |
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496 | |
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497 | // Energy should not be larger than the initial value |
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498 | accuracy = ( theEnergyChange - aTrack.GetKineticEnergy())/MeV; |
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499 | if (accuracy > GetAccuracyForWarning()) { |
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500 | G4cout << "ERROR - G4FastStep::CheckIt()" << G4endl |
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501 | << " The energy becomes larger than the initial value !!" |
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502 | << G4endl |
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503 | << " Difference: " << accuracy << "[MeV] " << G4endl; |
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504 | itsOK = false; |
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505 | if (accuracy > GetAccuracyForException()) {exitWithError = true;} |
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506 | } |
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507 | |
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508 | G4bool itsOKforMomentum = true; |
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509 | if ( theEnergyChange >0.) { |
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510 | accuracy = std::abs(theMomentumChange.mag2()-1.0); |
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511 | if (accuracy > GetAccuracyForWarning()) { |
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512 | G4cout << "ERROR - G4FastStep::CheckIt()" << G4endl |
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513 | << " The Momentum Change is not unit vector !!" << G4endl |
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514 | << " Difference: " << accuracy << G4endl; |
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515 | itsOK = itsOKforMomentum = false; |
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516 | if (accuracy > GetAccuracyForException()) {exitWithError = true;} |
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517 | } |
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518 | } |
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519 | |
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520 | accuracy = (aTrack.GetGlobalTime()- theTimeChange)/ns; |
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521 | if (accuracy > GetAccuracyForWarning()) { |
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522 | G4cout << "ERROR - G4FastStep::CheckIt()" << G4endl |
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523 | << " The global time goes back !!" << G4endl |
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524 | << " Difference: " << accuracy << "[ns] " << G4endl; |
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525 | itsOK = false; |
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526 | } |
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527 | |
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528 | accuracy = (aTrack.GetProperTime() - theProperTimeChange )/ns; |
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529 | if (accuracy) { |
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530 | G4cout << "ERROR - G4FastStep::CheckIt()" << G4endl |
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531 | << " The proper time goes back !!" << G4endl |
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532 | << " Difference: " << accuracy << "[ns] " << G4endl; |
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533 | itsOK = false; |
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534 | } |
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535 | |
---|
536 | if (!itsOK) { |
---|
537 | G4cout << "ERROR - G4FastStep::CheckIt() " << G4endl; |
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538 | G4cout << " Pointer : " << this << G4endl ; |
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539 | DumpInfo(); |
---|
540 | } |
---|
541 | |
---|
542 | // Exit with error |
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543 | if (exitWithError) { |
---|
544 | G4Exception("G4FastStep::CheckIt()", "FatalError", |
---|
545 | FatalException, "Error condition in G4ParticleChange."); |
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546 | } |
---|
547 | |
---|
548 | //correction for Momentum only. |
---|
549 | if (!itsOKforMomentum) { |
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550 | G4double vmag = theMomentumChange.mag(); |
---|
551 | theMomentumChange = (1./vmag)*theMomentumChange; |
---|
552 | } |
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553 | |
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554 | itsOK = (itsOK) && G4VParticleChange::CheckIt(aTrack); |
---|
555 | return itsOK; |
---|
556 | } |
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