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: G4BlineTracer.cc,v 1.3 2006/06/29 17:15:16 gunter Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // |
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31 | // -------------------------------------------------------------------- |
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32 | // |
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33 | // G4BlineTracer implementation |
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34 | // |
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35 | // -------------------------------------------------------------------- |
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36 | // Author: Laurent Desorgher (desorgher@phim.unibe.ch) |
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37 | // Created - 2003-10-06 |
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38 | // -------------------------------------------------------------------- |
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39 | |
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40 | #include "G4BlineTracer.hh" |
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41 | #include "G4BlineTracerMessenger.hh" |
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42 | #include "G4BlinePrimaryGeneratorAction.hh" |
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43 | #include "G4BlineEventAction.hh" |
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44 | #include "G4BlineSteppingAction.hh" |
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45 | #include "G4BlineEquation.hh" |
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46 | |
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47 | #include "G4RunManager.hh" |
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48 | #include "G4TransportationManager.hh" |
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49 | #include "G4FieldManager.hh" |
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50 | #include "G4PropagatorInField.hh" |
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51 | #include "G4CashKarpRKF45.hh" |
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52 | #include "G4LogicalVolumeStore.hh" |
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53 | #include "G4ChordFinder.hh" |
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54 | |
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55 | ////////////////////////////////////////////////////////////////// |
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56 | |
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57 | G4BlineTracer::G4BlineTracer() |
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58 | { |
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59 | fMessenger = new G4BlineTracerMessenger(this); |
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60 | fSteppingAction = new G4BlineSteppingAction(this) ; |
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61 | fEventAction = new G4BlineEventAction(this); |
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62 | fPrimaryGeneratorAction = new G4BlinePrimaryGeneratorAction(); |
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63 | MaxTrackingStep =1000.*m; |
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64 | was_ResetChordFinders_already_called=false; |
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65 | } |
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66 | |
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67 | /////////////////////////////////////////////////////////////////////// |
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68 | |
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69 | G4BlineTracer::~G4BlineTracer() |
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70 | { |
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71 | delete fMessenger; |
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72 | delete fSteppingAction; |
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73 | delete fEventAction; |
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74 | delete fPrimaryGeneratorAction; |
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75 | for (size_t i=0; i< vecEquationOfMotion.size();i++) |
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76 | { |
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77 | if (vecEquationOfMotion[i]) delete vecEquationOfMotion[i]; |
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78 | if (vecChordFinders[i]) delete vecChordFinders[i]; |
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79 | } |
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80 | } |
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81 | |
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82 | //////////////////////////////////////////////////////////////////// |
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83 | |
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84 | void G4BlineTracer::BeginOfRunAction(const G4Run*) |
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85 | { |
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86 | } |
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87 | |
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88 | /////////////////////////////////////////////////////////////////////// |
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89 | |
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90 | void G4BlineTracer::EndOfRunAction(const G4Run*) |
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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 | |
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96 | void G4BlineTracer::ComputeBlines(G4int n_of_lines) |
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97 | { |
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98 | //the first time ResetChordFinders should be called |
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99 | // |
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100 | if (!was_ResetChordFinders_already_called) |
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101 | { |
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102 | ResetChordFinders(); |
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103 | was_ResetChordFinders_already_called=true; |
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104 | } |
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105 | |
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106 | // Replace the user action by the ad-hoc actions for Blines |
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107 | |
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108 | G4RunManager* theRunManager = G4RunManager::GetRunManager(); |
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109 | G4UserRunAction* user_run_action = |
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110 | (G4UserRunAction*)theRunManager->GetUserRunAction(); |
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111 | theRunManager->SetUserAction(this); |
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112 | |
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113 | G4UserSteppingAction* user_stepping_action = |
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114 | (G4UserSteppingAction*)theRunManager->GetUserSteppingAction(); |
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115 | theRunManager->SetUserAction(fSteppingAction); |
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116 | |
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117 | G4VUserPrimaryGeneratorAction* fUserPrimaryAction = |
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118 | (G4VUserPrimaryGeneratorAction*)theRunManager->GetUserPrimaryGeneratorAction(); |
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119 | if (fUserPrimaryAction) |
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120 | fPrimaryGeneratorAction->SetUserPrimaryAction(fUserPrimaryAction); |
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121 | theRunManager->SetUserAction(fPrimaryGeneratorAction); |
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122 | |
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123 | G4UserEventAction* user_event_action = |
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124 | (G4UserEventAction*)theRunManager->GetUserEventAction(); |
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125 | theRunManager->SetUserAction(fEventAction); |
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126 | |
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127 | G4UserTrackingAction* user_tracking_action = |
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128 | (G4UserTrackingAction*)theRunManager->GetUserTrackingAction(); |
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129 | G4UserTrackingAction* aNullTrackingAction = 0; |
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130 | theRunManager->SetUserAction(aNullTrackingAction); |
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131 | |
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132 | G4UserStackingAction* user_stacking_action = |
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133 | (G4UserStackingAction*)theRunManager->GetUserStackingAction(); |
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134 | G4UserStackingAction* aNullStackingAction = 0; |
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135 | theRunManager->SetUserAction(aNullStackingAction); |
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136 | |
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137 | // replace the user defined chordfinder by the element of vecChordFinders |
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138 | |
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139 | std::vector<G4ChordFinder*> user_chord_finders; |
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140 | std::vector<G4double> user_largest_acceptable_step; |
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141 | for (size_t i=0;i<vecChordFinders.size();i++) |
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142 | { |
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143 | user_largest_acceptable_step.push_back(-1.); |
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144 | if (vecChordFinders[i]) |
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145 | { |
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146 | user_chord_finders.push_back(vecFieldManagers[i]->GetChordFinder()); |
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147 | vecChordFinders[i]->SetDeltaChord(user_chord_finders[i]->GetDeltaChord()); |
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148 | vecFieldManagers[i]->SetChordFinder(vecChordFinders[i]); |
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149 | } |
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150 | else user_chord_finders.push_back(0); |
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151 | } |
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152 | |
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153 | // I have tried to use the smooth line filter ability but I could not obtain |
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154 | // a smooth trajectory in the G4TrajectoryContainer after an event |
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155 | // Another solution for obtaining a smooth trajectory is to limit |
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156 | // the LargestAcceptableStep in the G4PropagatorInField object. |
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157 | // This is the solution I used. |
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158 | |
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159 | // Old solution: |
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160 | // G4TransportationManager::GetTransportationManager() |
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161 | // ->GetPropagatorInField()->SetTrajectoryFilter(fTrajectoryFilter); |
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162 | |
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163 | // New solution: |
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164 | // set the largest_acceptable_step to max_step:length |
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165 | |
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166 | G4TransportationManager* tmanager = |
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167 | G4TransportationManager::GetTransportationManager(); |
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168 | G4double previous_largest_acceptable_step = |
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169 | tmanager->GetPropagatorInField()->GetLargestAcceptableStep(); |
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170 | |
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171 | tmanager->GetPropagatorInField() |
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172 | ->SetLargestAcceptableStep(MaxTrackingStep); |
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173 | |
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174 | // Start the integration of n_of_lines different magnetic field lines |
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175 | |
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176 | for (G4int i=0; i<n_of_lines;i++) |
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177 | { |
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178 | // for each magnetic field line we integrate once backward and once |
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179 | // forward from the same starting point |
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180 | |
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181 | // backward integration |
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182 | |
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183 | for (size_t i=0; i< vecEquationOfMotion.size();i++) |
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184 | { |
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185 | if (vecEquationOfMotion[i]) |
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186 | vecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(true); |
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187 | } |
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188 | theRunManager->BeamOn(1); |
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189 | |
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190 | // forward integration |
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191 | |
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192 | for (size_t i=0; i < vecEquationOfMotion.size();i++) |
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193 | { |
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194 | if (vecEquationOfMotion[i]) |
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195 | vecEquationOfMotion[i]->SetBackwardDirectionOfIntegration(false); |
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196 | } |
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197 | theRunManager->BeamOn(1); |
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198 | } |
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199 | |
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200 | // Remove trajectory filter to PropagatorInField |
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201 | // It was for old solution when using smooth trajectory filter |
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202 | |
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203 | // tmanager->GetPropagatorInField()->SetTrajectoryFilter(0); |
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204 | |
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205 | // back to User defined actions and other parameters |
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206 | // ------------------------------------------------- |
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207 | |
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208 | tmanager->GetPropagatorInField() |
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209 | ->SetLargestAcceptableStep(previous_largest_acceptable_step); |
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210 | |
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211 | // return to User actions |
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212 | |
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213 | theRunManager->SetUserAction(user_run_action); |
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214 | theRunManager->SetUserAction(user_event_action); |
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215 | theRunManager->SetUserAction(fUserPrimaryAction); |
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216 | theRunManager->SetUserAction(user_stepping_action); |
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217 | theRunManager->SetUserAction(user_tracking_action); |
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218 | theRunManager->SetUserAction(user_stacking_action); |
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219 | |
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220 | // set user defined chord finders and largest acceptable step |
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221 | |
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222 | for (size_t i=0;i<vecFieldManagers.size();i++) |
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223 | { |
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224 | if (user_chord_finders[i]) |
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225 | vecFieldManagers[i]->SetChordFinder(user_chord_finders[i]); |
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226 | } |
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227 | } |
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228 | |
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229 | //////////////////////////////////////////////////////////////// |
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230 | |
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231 | /* |
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232 | G4bool G4BlineTracer::CheckMagneticFields() |
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233 | { |
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234 | // Check FieldManagers |
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235 | |
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236 | G4TransportationManager* tmanager = |
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237 | G4TransportationManager::GetTransportationManager(); |
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238 | |
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239 | if (vecFieldManagers[0] != tmanager->GetFieldManager()) |
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240 | return false; |
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241 | if (vecMagneticFields[0] != tmanager->GetFieldManager()->GetDetectorField()) |
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242 | return false; |
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243 | G4LogicalVolumeStore* theVolumeStore = G4LogicalVolumeStore::GetInstance(); |
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244 | |
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245 | std::vector<G4FieldManagers*> LogicalVolumeFields; |
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246 | size_t j=0; |
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247 | for (size_t i=0; i<theVolumeStore.size();i++) |
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248 | { |
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249 | if (theVolumeStore[i]->GetFieldManager()) |
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250 | { |
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251 | j++; |
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252 | if (j >= vecFieldManagers.size()) return false; |
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253 | if (vecFieldManagers[j] != theVolumeStore[i]->GetFieldManager()) |
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254 | return false; |
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255 | if (vecMagneticFields[j] != |
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256 | theVolumeStore[i]->GetFieldManager()->GetDetectorField()) |
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257 | return false; |
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258 | } |
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259 | } |
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260 | if (j<vecFieldManagers.size()) return false; |
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261 | |
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262 | return true; |
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263 | } |
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264 | */ |
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265 | |
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266 | //////////////////////////////////////////////////////////////// |
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267 | |
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268 | void G4BlineTracer::ResetChordFinders() |
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269 | { |
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270 | for (size_t i=0; i<vecEquationOfMotion.size();i++) |
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271 | { |
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272 | delete vecEquationOfMotion[i]; |
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273 | delete vecChordFinders[i]; |
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274 | } |
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275 | |
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276 | vecChordFinders.clear(); |
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277 | vecFieldManagers.clear(); |
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278 | vecMagneticFields.clear(); |
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279 | vecEquationOfMotion.clear(); |
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280 | |
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281 | // global field |
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282 | |
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283 | vecChordFinders.push_back(0); |
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284 | vecMagneticFields.push_back(0); |
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285 | vecEquationOfMotion.push_back(0); |
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286 | vecFieldManagers.push_back(G4TransportationManager::GetTransportationManager() |
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287 | ->GetFieldManager()); |
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288 | if (vecFieldManagers[0]) |
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289 | { |
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290 | vecMagneticFields[0] = |
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291 | (G4MagneticField*) vecFieldManagers[0]->GetDetectorField(); |
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292 | if (vecMagneticFields[0]) |
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293 | { |
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294 | vecEquationOfMotion[0] = new G4BlineEquation(vecMagneticFields[0]); |
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295 | G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(vecEquationOfMotion[0]); |
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296 | G4MagInt_Driver* pIntgrDriver = |
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297 | new G4MagInt_Driver(0.01*mm,pStepper,pStepper->GetNumberOfVariables()); |
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298 | vecChordFinders[0] = new G4ChordFinder(pIntgrDriver); |
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299 | } |
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300 | } |
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301 | |
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302 | // local fields |
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303 | |
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304 | G4LogicalVolumeStore* theVolumeStore = G4LogicalVolumeStore::GetInstance(); |
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305 | |
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306 | size_t j=0; |
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307 | for (size_t i=0; i<theVolumeStore->size();i++) |
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308 | { |
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309 | if ((*theVolumeStore)[i]->GetFieldManager()) |
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310 | { |
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311 | j++; |
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312 | vecFieldManagers.push_back(((*theVolumeStore)[i])->GetFieldManager()); |
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313 | vecMagneticFields.push_back((G4MagneticField*) |
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314 | vecFieldManagers[j]->GetDetectorField()); |
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315 | vecEquationOfMotion.push_back(0); |
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316 | vecChordFinders.push_back(0); |
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317 | if (vecMagneticFields[j]) |
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318 | { |
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319 | vecEquationOfMotion[j]= new G4BlineEquation(vecMagneticFields[j]); |
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320 | G4CashKarpRKF45* pStepper = new G4CashKarpRKF45(vecEquationOfMotion[j]); |
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321 | G4MagInt_Driver* pIntgrDriver = |
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322 | new G4MagInt_Driver(.01*mm,pStepper,pStepper->GetNumberOfVariables()); |
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323 | vecChordFinders[j] = new G4ChordFinder(pIntgrDriver); |
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324 | } |
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325 | } |
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326 | } |
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327 | } |
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