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: G4WeightCutOffProcess.cc,v 1.3 2008/04/21 09:10:29 ahoward Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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29 | // |
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30 | // ---------------------------------------------------------------------- |
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31 | // GEANT 4 class source file |
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32 | // |
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33 | // G4WeightCutOffProcess.cc |
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34 | // |
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35 | // ---------------------------------------------------------------------- |
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36 | |
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37 | #include "G4WeightCutOffProcess.hh" |
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38 | //#include "G4VScorer.hh" |
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39 | #include "G4GeometryCellStep.hh" |
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40 | //#include "G4GCellFinder.hh" |
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41 | #include "G4TouchableHandle.hh" |
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42 | #include "G4VIStore.hh" |
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43 | |
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44 | #include "G4Step.hh" |
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45 | #include "G4Navigator.hh" |
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46 | #include "G4VTouchable.hh" |
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47 | #include "G4VPhysicalVolume.hh" |
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48 | #include "G4ParticleChange.hh" |
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49 | #include "G4PathFinder.hh" |
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50 | #include "G4TransportationManager.hh" |
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51 | #include "G4StepPoint.hh" |
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52 | #include "G4FieldTrackUpdator.hh" |
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53 | |
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54 | |
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55 | G4WeightCutOffProcess:: |
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56 | G4WeightCutOffProcess(G4double wsurvival, |
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57 | G4double wlimit, |
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58 | G4double isource, |
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59 | G4VIStore *istore, |
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60 | // const G4VGCellFinder &aGCellFinder, |
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61 | const G4String &aName, G4bool para) |
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62 | : G4VProcess(aName), |
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63 | fParticleChange(new G4ParticleChange), |
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64 | fWeightSurvival(wsurvival), |
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65 | fWeightLimit(wlimit), |
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66 | fSourceImportance(isource), |
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67 | fIStore(istore), |
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68 | // fGCellFinder(aGCellFinder), |
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69 | fGhostNavigator(0), fNavigatorID(-1), fFieldTrack('0') |
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70 | { |
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71 | if (!fParticleChange) |
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72 | { |
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73 | G4Exception("G4WeightCutOffProcess::G4WeightCutOffProcess()", |
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74 | "FatalError", FatalException, |
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75 | "Failed to allocate G4ParticleChange !"); |
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76 | } |
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77 | |
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78 | G4VProcess::pParticleChange = fParticleChange; |
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79 | |
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80 | fGhostStep = new G4Step(); |
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81 | fGhostPreStepPoint = fGhostStep->GetPreStepPoint(); |
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82 | fGhostPostStepPoint = fGhostStep->GetPostStepPoint(); |
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83 | |
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84 | fTransportationManager = G4TransportationManager::GetTransportationManager(); |
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85 | fPathFinder = G4PathFinder::GetInstance(); |
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86 | |
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87 | if (verboseLevel>0) |
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88 | { |
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89 | G4cout << GetProcessName() << " is created " << G4endl; |
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90 | } |
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91 | |
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92 | paraflag = para; |
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93 | |
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94 | } |
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95 | |
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96 | G4WeightCutOffProcess::~G4WeightCutOffProcess() |
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97 | { |
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98 | delete fParticleChange; |
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99 | delete fGhostStep; |
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100 | } |
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101 | |
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102 | |
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103 | //------------------------------------------------------ |
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104 | // |
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105 | // SetParallelWorld |
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106 | // |
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107 | //------------------------------------------------------ |
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108 | void G4WeightCutOffProcess:: |
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109 | SetParallelWorld(G4String parallelWorldName) |
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110 | { |
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111 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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112 | // Get pointers of the parallel world and its navigator |
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113 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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114 | fGhostWorldName = parallelWorldName; |
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115 | fGhostWorld = fTransportationManager->GetParallelWorld(fGhostWorldName); |
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116 | fGhostNavigator = fTransportationManager->GetNavigator(fGhostWorld); |
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117 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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118 | } |
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119 | |
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120 | void G4WeightCutOffProcess:: |
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121 | SetParallelWorld(G4VPhysicalVolume* parallelWorld) |
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122 | { |
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123 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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124 | // Get pointer of navigator |
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125 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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126 | fGhostWorldName = parallelWorld->GetName(); |
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127 | fGhostWorld = parallelWorld; |
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128 | fGhostNavigator = fTransportationManager->GetNavigator(fGhostWorld); |
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129 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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130 | } |
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131 | |
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132 | //------------------------------------------------------ |
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133 | // |
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134 | // StartTracking |
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135 | // |
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136 | //------------------------------------------------------ |
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137 | void G4WeightCutOffProcess::StartTracking(G4Track* trk) |
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138 | { |
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139 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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140 | // Activate navigator and get the navigator ID |
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141 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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142 | // G4cout << " G4ParallelWorldScoringProcess::StartTracking" << G4endl; |
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143 | |
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144 | if(paraflag) { |
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145 | if(fGhostNavigator) |
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146 | { fNavigatorID = fTransportationManager->ActivateNavigator(fGhostNavigator); } |
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147 | else |
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148 | { |
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149 | G4Exception("G4WeightCutOffProcess::StartTracking", |
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150 | "ProcParaWorld000",FatalException, |
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151 | "G4WeightCutOffProcess is used for tracking without having a parallel world assigned"); |
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152 | } |
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153 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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154 | |
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155 | // G4cout << "G4ParallelWorldScoringProcess::StartTracking <<<<<<<<<<<<<<<<<< " << G4endl; |
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156 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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157 | // Let PathFinder initialize |
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158 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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159 | fPathFinder->PrepareNewTrack(trk->GetPosition(),trk->GetMomentumDirection()); |
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160 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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161 | |
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162 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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163 | // Setup initial touchables for the first step |
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164 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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165 | fOldGhostTouchable = fPathFinder->CreateTouchableHandle(fNavigatorID); |
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166 | fGhostPreStepPoint->SetTouchableHandle(fOldGhostTouchable); |
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167 | fNewGhostTouchable = fOldGhostTouchable; |
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168 | fGhostPostStepPoint->SetTouchableHandle(fNewGhostTouchable); |
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169 | |
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170 | // Initialize |
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171 | fGhostSafety = -1.; |
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172 | fOnBoundary = false; |
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173 | } |
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174 | } |
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175 | |
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176 | |
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177 | G4double G4WeightCutOffProcess:: |
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178 | PostStepGetPhysicalInteractionLength(const G4Track &, |
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179 | G4double, G4ForceCondition* condition) |
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180 | { |
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181 | // *condition = Forced; |
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182 | // return kInfinity; |
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183 | |
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184 | // *condition = StronglyForced; |
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185 | *condition = Forced; |
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186 | return DBL_MAX; |
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187 | } |
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188 | |
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189 | G4VParticleChange * |
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190 | G4WeightCutOffProcess::PostStepDoIt(const G4Track& aTrack, |
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191 | const G4Step &aStep) |
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192 | { |
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193 | fParticleChange->Initialize(aTrack); |
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194 | |
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195 | if(paraflag) { |
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196 | fOldGhostTouchable = fGhostPostStepPoint->GetTouchableHandle(); |
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197 | //xbug? fOnBoundary = false; |
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198 | CopyStep(aStep); |
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199 | |
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200 | if(fOnBoundary) |
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201 | { |
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202 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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203 | // Locate the point and get new touchable |
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204 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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205 | //?? fPathFinder->Locate(step.GetPostStepPoint()->GetPosition(), |
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206 | //?? step.GetPostStepPoint()->GetMomentumDirection()); |
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207 | fNewGhostTouchable = fPathFinder->CreateTouchableHandle(fNavigatorID); |
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208 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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209 | } |
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210 | else |
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211 | { |
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212 | // Do I need this ?????????????????????????????????????????????????????????? |
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213 | // fGhostNavigator->LocateGlobalPointWithinVolume(track.GetPosition()); |
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214 | // ????????????????????????????????????????????????????????????????????????? |
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215 | |
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216 | // fPathFinder->ReLocate(track.GetPosition()); |
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217 | |
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218 | // reuse the touchable |
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219 | fNewGhostTouchable = fOldGhostTouchable; |
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220 | } |
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221 | |
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222 | fGhostPreStepPoint->SetTouchableHandle(fOldGhostTouchable); |
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223 | fGhostPostStepPoint->SetTouchableHandle(fNewGhostTouchable); |
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224 | |
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225 | } |
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226 | |
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227 | if(paraflag) { |
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228 | G4GeometryCell postCell(*(fGhostPostStepPoint->GetPhysicalVolume()), |
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229 | fGhostPostStepPoint->GetTouchable()->GetReplicaNumber()); |
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230 | |
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231 | |
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232 | // G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(aStep); |
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233 | // G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(fGhostStep); |
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234 | G4double R = fSourceImportance; |
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235 | if (fIStore) |
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236 | { |
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237 | G4double i = fIStore->GetImportance(postCell); |
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238 | if (i>0) |
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239 | { |
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240 | R/=i; |
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241 | } |
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242 | } |
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243 | G4double w = aTrack.GetWeight(); |
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244 | if (w<R*fWeightLimit) |
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245 | { |
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246 | G4double ws = fWeightSurvival*R; |
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247 | G4double p = w/(ws); |
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248 | if (G4UniformRand()<p) |
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249 | { |
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250 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
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251 | } |
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252 | else |
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253 | { |
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254 | fParticleChange->ProposeWeight(ws); |
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255 | } |
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256 | } |
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257 | } else { |
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258 | |
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259 | G4GeometryCell postCell(*(aStep.GetPostStepPoint()->GetPhysicalVolume()), |
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260 | aStep.GetPostStepPoint()->GetTouchable()->GetReplicaNumber()); |
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261 | |
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262 | // G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(aStep); |
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263 | // G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(fGhostStep); |
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264 | G4double R = fSourceImportance; |
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265 | if (fIStore) |
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266 | { |
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267 | G4double i = fIStore->GetImportance(postCell); |
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268 | if (i>0) |
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269 | { |
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270 | R/=i; |
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271 | } |
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272 | } |
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273 | G4double w = aTrack.GetWeight(); |
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274 | if (w<R*fWeightLimit) |
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275 | { |
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276 | G4double ws = fWeightSurvival*R; |
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277 | G4double p = w/(ws); |
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278 | if (G4UniformRand()<p) |
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279 | { |
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280 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
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281 | } |
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282 | else |
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283 | { |
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284 | fParticleChange->ProposeWeight(ws); |
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285 | } |
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286 | } |
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287 | } |
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288 | |
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289 | return fParticleChange; |
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290 | |
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291 | } |
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292 | |
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293 | const G4String &G4WeightCutOffProcess::GetName() const |
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294 | { |
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295 | return theProcessName; |
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296 | } |
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297 | |
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298 | G4double G4WeightCutOffProcess:: |
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299 | AlongStepGetPhysicalInteractionLength( |
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300 | const G4Track& track, G4double previousStepSize, G4double currentMinimumStep, |
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301 | G4double& proposedSafety, G4GPILSelection* selection) |
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302 | { |
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303 | if(paraflag) { |
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304 | static G4FieldTrack endTrack('0'); |
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305 | static ELimited eLimited; |
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306 | |
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307 | *selection = NotCandidateForSelection; |
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308 | G4double returnedStep = DBL_MAX; |
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309 | |
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310 | if (previousStepSize > 0.) |
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311 | { fGhostSafety -= previousStepSize; } |
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312 | // else |
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313 | // { fGhostSafety = -1.; } |
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314 | if (fGhostSafety < 0.) fGhostSafety = 0.0; |
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315 | |
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316 | // ------------------------------------------ |
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317 | // Determination of the proposed STEP LENGTH: |
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318 | // ------------------------------------------ |
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319 | if (currentMinimumStep <= fGhostSafety && currentMinimumStep > 0.) |
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320 | { |
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321 | // I have no chance to limit |
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322 | returnedStep = currentMinimumStep; |
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323 | fOnBoundary = false; |
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324 | proposedSafety = fGhostSafety - currentMinimumStep; |
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325 | } |
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326 | else // (currentMinimumStep > fGhostSafety: I may limit the Step) |
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327 | { |
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328 | G4FieldTrackUpdator::Update(&fFieldTrack,&track); |
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329 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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330 | // ComputeStep |
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331 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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332 | returnedStep |
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333 | = fPathFinder->ComputeStep(fFieldTrack,currentMinimumStep,fNavigatorID, |
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334 | track.GetCurrentStepNumber(),fGhostSafety,eLimited, |
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335 | endTrack,track.GetVolume()); |
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336 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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337 | if(eLimited == kDoNot) |
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338 | { |
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339 | // Track is not on the boundary |
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340 | fOnBoundary = false; |
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341 | fGhostSafety = fGhostNavigator->ComputeSafety(endTrack.GetPosition()); |
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342 | } |
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343 | else |
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344 | { |
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345 | // Track is on the boundary |
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346 | fOnBoundary = true; |
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347 | proposedSafety = fGhostSafety; |
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348 | } |
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349 | //xbug? proposedSafety = fGhostSafety; |
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350 | if(eLimited == kUnique || eLimited == kSharedOther) { |
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351 | *selection = CandidateForSelection; |
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352 | }else if (eLimited == kSharedTransport) { |
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353 | returnedStep *= (1.0 + 1.0e-9); |
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354 | // Expand to disable its selection in Step Manager comparison |
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355 | } |
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356 | |
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357 | } |
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358 | |
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359 | // ---------------------------------------------- |
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360 | // Returns the fGhostSafety as the proposedSafety |
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361 | // The SteppingManager will take care of keeping |
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362 | // the smallest one. |
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363 | // ---------------------------------------------- |
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364 | return returnedStep; |
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365 | |
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366 | } else { |
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367 | return DBL_MAX; |
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368 | //not sensible! return -1.0; |
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369 | } |
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370 | |
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371 | } |
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372 | |
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373 | |
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374 | G4double G4WeightCutOffProcess:: |
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375 | AtRestGetPhysicalInteractionLength(const G4Track& , |
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376 | G4ForceCondition*) |
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377 | { |
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378 | return -1.0; |
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379 | } |
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380 | |
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381 | G4VParticleChange* |
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382 | G4WeightCutOffProcess::AtRestDoIt(const G4Track&, const G4Step&) |
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383 | { |
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384 | return 0; |
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385 | } |
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386 | |
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387 | G4VParticleChange* |
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388 | G4WeightCutOffProcess::AlongStepDoIt(const G4Track& track, const G4Step&) |
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389 | { |
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390 | // Dummy ParticleChange ie: does nothing |
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391 | // Expecting G4Transportation to move the track |
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392 | pParticleChange->Initialize(track); |
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393 | return pParticleChange; |
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394 | |
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395 | // return 0; |
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396 | } |
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397 | |
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398 | void G4WeightCutOffProcess::CopyStep(const G4Step & step) |
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399 | { |
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400 | fGhostStep->SetTrack(step.GetTrack()); |
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401 | fGhostStep->SetStepLength(step.GetStepLength()); |
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402 | fGhostStep->SetTotalEnergyDeposit(step.GetTotalEnergyDeposit()); |
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403 | fGhostStep->SetControlFlag(step.GetControlFlag()); |
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404 | |
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405 | *fGhostPreStepPoint = *(step.GetPreStepPoint()); |
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406 | *fGhostPostStepPoint = *(step.GetPostStepPoint()); |
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407 | |
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408 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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409 | // Set StepStatus for ghost world |
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410 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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411 | if(fOnBoundary) |
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412 | { fGhostPostStepPoint->SetStepStatus(fGeomBoundary); } |
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413 | else if(fGhostPostStepPoint->GetStepStatus()==fGeomBoundary) |
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414 | { fGhostPostStepPoint->SetStepStatus(fPostStepDoItProc); } |
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415 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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416 | } |
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