1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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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: G4RegularNavigation.cc,v 1.7 2007/12/10 16:30:01 gunter Exp $ |
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28 | // GEANT4 tag $ Name:$ |
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29 | // |
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30 | // class G4RegularNavigation implementation |
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31 | // |
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32 | // Author: Pedro Arce, May 2007 |
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33 | // |
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34 | // -------------------------------------------------------------------- |
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35 | |
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36 | #include "G4RegularNavigation.hh" |
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37 | #include "G4TouchableHistory.hh" |
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38 | #include "G4PhantomParameterisation.hh" |
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39 | #include "G4Material.hh" |
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40 | #include "G4NormalNavigation.hh" |
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41 | #include "G4Navigator.hh" |
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42 | #include "G4GeometryTolerance.hh" |
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43 | |
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44 | //------------------------------------------------------------------ |
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45 | G4RegularNavigation::G4RegularNavigation() |
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46 | : fVerbose(1), fCheck(true) |
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47 | { |
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48 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance(); |
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49 | } |
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50 | |
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51 | |
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52 | //------------------------------------------------------------------ |
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53 | G4RegularNavigation::~G4RegularNavigation() |
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54 | { |
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55 | } |
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56 | |
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57 | |
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58 | //------------------------------------------------------------------ |
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59 | G4double G4RegularNavigation:: |
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60 | ComputeStep(const G4ThreeVector& localPoint, |
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61 | const G4ThreeVector& localDirection, |
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62 | const G4double currentProposedStepLength, |
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63 | G4double& newSafety, |
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64 | G4NavigationHistory& history, |
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65 | G4bool& validExitNormal, |
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66 | G4ThreeVector& exitNormal, |
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67 | G4bool& exiting, |
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68 | G4bool& entering, |
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69 | G4VPhysicalVolume *(*pBlockedPhysical), |
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70 | G4int& blockedReplicaNo) |
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71 | { |
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72 | // This method is never called because to be called the daughter has to be |
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73 | // a regular structure. This would only happen if the track is in the mother |
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74 | // of voxels volume. But the voxels fill completely their mother, so when a |
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75 | // track enters the mother it automatically enters a voxel. Only precision |
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76 | // problems would make this method to be called |
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77 | |
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78 | G4ThreeVector globalPoint = |
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79 | history.GetTopTransform().Inverse().TransformPoint(localPoint); |
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80 | G4ThreeVector globalDirection = |
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81 | history.GetTopTransform().Inverse().TransformAxis(localDirection); |
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82 | |
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83 | G4ThreeVector localPoint2 = localPoint; // take away constantness |
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84 | |
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85 | LevelLocate( history, *pBlockedPhysical, blockedReplicaNo, |
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86 | globalPoint, &globalDirection, true, localPoint2 ); |
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87 | |
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88 | |
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89 | // Get in which voxel it is |
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90 | // |
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91 | G4VPhysicalVolume *motherPhysical, *daughterPhysical; |
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92 | G4LogicalVolume *motherLogical; |
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93 | motherPhysical = history.GetTopVolume(); |
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94 | motherLogical = motherPhysical->GetLogicalVolume(); |
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95 | daughterPhysical = motherLogical->GetDaughter(0); |
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96 | |
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97 | G4PhantomParameterisation * daughterParam = |
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98 | (G4PhantomParameterisation*)(daughterPhysical->GetParameterisation()); |
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99 | G4int copyNo = daughterParam ->GetReplicaNo(localPoint,localDirection); |
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100 | |
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101 | G4ThreeVector voxelTranslation = daughterParam->GetTranslation( copyNo ); |
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102 | G4ThreeVector daughterPoint = localPoint - voxelTranslation; |
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103 | |
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104 | |
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105 | // Compute step in voxel |
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106 | // |
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107 | return fnormalNav->ComputeStep(daughterPoint, |
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108 | localDirection, |
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109 | currentProposedStepLength, |
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110 | newSafety, |
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111 | history, |
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112 | validExitNormal, |
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113 | exitNormal, |
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114 | exiting, |
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115 | entering, |
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116 | pBlockedPhysical, |
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117 | blockedReplicaNo); |
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118 | } |
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119 | |
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120 | |
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121 | //------------------------------------------------------------------ |
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122 | G4double G4RegularNavigation::ComputeStepSkippingEqualMaterials( |
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123 | G4ThreeVector localPoint, |
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124 | const G4ThreeVector& localDirection, |
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125 | const G4double currentProposedStepLength, |
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126 | G4double& newSafety, |
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127 | G4NavigationHistory& history, |
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128 | G4bool& validExitNormal, |
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129 | G4ThreeVector& exitNormal, |
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130 | G4bool& exiting, |
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131 | G4bool& entering, |
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132 | G4VPhysicalVolume *(*pBlockedPhysical), |
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133 | G4int& blockedReplicaNo, |
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134 | G4VPhysicalVolume* pCurrentPhysical) |
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135 | { |
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136 | G4PhantomParameterisation *param = |
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137 | (G4PhantomParameterisation*)(pCurrentPhysical->GetParameterisation()); |
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138 | |
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139 | if( !param->SkipEqualMaterials() ) { |
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140 | return fnormalNav->ComputeStep(localPoint, |
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141 | localDirection, |
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142 | currentProposedStepLength, |
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143 | newSafety, |
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144 | history, |
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145 | validExitNormal, |
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146 | exitNormal, |
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147 | exiting, |
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148 | entering, |
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149 | pBlockedPhysical, |
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150 | blockedReplicaNo); |
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151 | } |
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152 | |
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153 | |
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154 | G4double ourStep = 0.; |
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155 | |
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156 | // To get replica No: transform local point to the reference system of the |
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157 | // param container volume |
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158 | // |
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159 | G4int ide = history.GetDepth(); |
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160 | G4ThreeVector containerPoint = history.GetTransform(ide).Inverse().TransformPoint(localPoint); |
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161 | |
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162 | // Point in global frame |
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163 | // |
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164 | containerPoint = history.GetTransform(ide).Inverse().TransformPoint(localPoint); |
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165 | |
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166 | // Point in voxel parent volume frame |
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167 | // |
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168 | containerPoint = history.GetTransform(ide-1).TransformPoint(containerPoint); |
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169 | |
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170 | // Store previous voxel translation to move localPoint by the difference |
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171 | // with the new one |
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172 | // |
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173 | G4ThreeVector prevVoxelTranslation = containerPoint - localPoint; |
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174 | |
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175 | // Do not use the expression below: There are cases where the |
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176 | // fLastLocatedPointLocal does not give the correct answer |
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177 | // (particle reaching a wall and bounced back, particle travelling through |
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178 | // the wall that is deviated in an step, ...; these are pathological cases |
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179 | // that give wrong answers in G4PhantomParameterisation::GetReplicaNo() |
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180 | // |
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181 | // G4ThreeVector prevVoxelTranslation = param->GetTranslation( copyNo ); |
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182 | |
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183 | G4int copyNo = param->GetReplicaNo(containerPoint,localDirection); |
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184 | |
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185 | G4Material* currentMate = param->ComputeMaterial( copyNo, 0, 0 ); |
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186 | G4VSolid* voxelBox = pCurrentPhysical->GetLogicalVolume()->GetSolid(); |
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187 | |
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188 | G4VSolid* containerSolid = param->GetContainerSolid(); |
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189 | G4Material* nextMate; |
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190 | G4bool bLocatedOnEdge = false; |
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191 | G4bool bFirstStep = true; |
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192 | G4double newStep; |
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193 | G4double totalNewStep = 0.; |
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194 | |
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195 | // Loop while same material is found |
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196 | // |
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197 | for( ;; ) |
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198 | { |
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199 | newStep = voxelBox->DistanceToOut( localPoint, localDirection ); |
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200 | if( (bFirstStep) && (newStep < currentProposedStepLength) ) |
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201 | { |
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202 | exiting = true; |
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203 | } |
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204 | bFirstStep = false; |
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205 | |
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206 | newStep += kCarTolerance; // Avoid precision problems |
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207 | ourStep += newStep; |
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208 | totalNewStep += newStep; |
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209 | |
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210 | // Physical process is limiting the step, don't continue |
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211 | // |
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212 | if(std::fabs(totalNewStep-currentProposedStepLength) < kCarTolerance) |
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213 | { |
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214 | return currentProposedStepLength; |
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215 | } |
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216 | |
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217 | // Move container point until wall of voxel |
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218 | // |
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219 | containerPoint += newStep*localDirection; |
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220 | if( containerSolid->Inside( containerPoint ) != kInside ) |
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221 | { |
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222 | bLocatedOnEdge = true; // NEEDED?? |
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223 | break; |
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224 | } |
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225 | |
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226 | // Get copyNo and translation of new voxel |
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227 | // |
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228 | copyNo = param->GetReplicaNo(containerPoint,localDirection); |
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229 | G4ThreeVector voxelTranslation = param->GetTranslation( copyNo ); |
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230 | |
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231 | // Move local point until wall of voxel and then put it in the new voxel |
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232 | // local coordinates |
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233 | // |
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234 | localPoint += newStep*localDirection; |
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235 | localPoint += prevVoxelTranslation - voxelTranslation; |
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236 | |
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237 | prevVoxelTranslation = voxelTranslation; |
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238 | |
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239 | // Check if material of next voxel is the same as that of the current voxel |
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240 | nextMate = param->ComputeMaterial( copyNo, 0, 0 ); |
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241 | |
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242 | if( currentMate != nextMate ) { break; } |
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243 | } |
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244 | |
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245 | return ourStep; |
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246 | } |
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247 | |
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248 | |
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249 | //------------------------------------------------------------------ |
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250 | G4double |
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251 | G4RegularNavigation::ComputeSafety(const G4ThreeVector& localPoint, |
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252 | const G4NavigationHistory& history, |
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253 | const G4double pMaxLength) |
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254 | { |
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255 | // This method is never called because to be called the daughter has to be a |
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256 | // regular structure. This would only happen if the track is in the mother of |
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257 | // voxels volume. But the voxels fill completely their mother, so when a |
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258 | // track enters the mother it automatically enters a voxel. Only precision |
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259 | // problems would make this method to be called |
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260 | |
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261 | // Compute step in voxel |
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262 | // |
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263 | return fnormalNav->ComputeSafety(localPoint, |
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264 | history, |
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265 | pMaxLength ); |
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266 | } |
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267 | |
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268 | |
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269 | //------------------------------------------------------------------ |
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270 | G4bool |
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271 | G4RegularNavigation::LevelLocate( G4NavigationHistory& history, |
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272 | const G4VPhysicalVolume* , |
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273 | const G4int , |
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274 | const G4ThreeVector& globalPoint, |
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275 | const G4ThreeVector* globalDirection, |
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276 | const G4bool pLocatedOnEdge, |
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277 | G4ThreeVector& localPoint ) |
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278 | { |
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279 | G4SmartVoxelHeader *motherVoxelHeader; |
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280 | G4VPhysicalVolume *motherPhysical, *pPhysical; |
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281 | G4PhantomParameterisation *pParam; |
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282 | G4LogicalVolume *motherLogical; |
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283 | G4VSolid *pSolid; |
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284 | G4ThreeVector localDir; |
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285 | G4int replicaNo; |
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286 | |
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287 | motherPhysical = history.GetTopVolume(); |
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288 | motherLogical = motherPhysical->GetLogicalVolume(); |
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289 | motherVoxelHeader = motherLogical->GetVoxelHeader(); |
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290 | |
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291 | pPhysical = motherLogical->GetDaughter(0); |
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292 | pParam = (G4PhantomParameterisation*)(pPhysical->GetParameterisation()); |
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293 | |
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294 | pSolid = pParam->GetContainerSolid(); |
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295 | |
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296 | // Save parent history in touchable history |
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297 | // ... for use as parent t-h in ComputeMaterial method of param |
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298 | // |
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299 | G4TouchableHistory parentTouchable( history ); |
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300 | |
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301 | // Get local direction |
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302 | // |
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303 | if( globalDirection ) |
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304 | { |
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305 | localDir = history.GetTopTransform().TransformAxis(*globalDirection); |
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306 | } |
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307 | else |
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308 | { |
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309 | localDir = G4ThreeVector(0.,0.,0.); |
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310 | } |
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311 | |
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312 | // Check that track is not on the surface and check that track is not |
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313 | // exiting the voxel parent volume |
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314 | // |
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315 | if ( !G4AuxiliaryNavServices::CheckPointOnSurface(pSolid, localPoint, |
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316 | globalDirection, history.GetTopTransform(), pLocatedOnEdge) |
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317 | || G4AuxiliaryNavServices::CheckPointExiting(pSolid, localPoint, |
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318 | globalDirection, history.GetTopTransform() ) ) |
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319 | { |
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320 | } |
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321 | else |
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322 | { |
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323 | // Enter this daughter |
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324 | // |
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325 | replicaNo = pParam->GetReplicaNo( localPoint, localDir ); |
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326 | |
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327 | if( replicaNo < 0 || replicaNo >= G4int(pParam->GetNoVoxel()) ) |
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328 | { |
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329 | return false; |
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330 | } |
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331 | |
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332 | // Set the correct copy number in physical |
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333 | // |
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334 | pPhysical->SetCopyNo(replicaNo); |
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335 | pParam->ComputeTransformation(replicaNo,pPhysical); |
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336 | |
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337 | history.NewLevel(pPhysical, kParameterised, replicaNo ); |
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338 | localPoint = history.GetTopTransform().TransformPoint(globalPoint); |
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339 | |
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340 | // Set the correct solid and material in Logical Volume |
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341 | // |
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342 | G4LogicalVolume *pLogical = pPhysical->GetLogicalVolume(); |
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343 | |
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344 | pLogical->UpdateMaterial(pParam->ComputeMaterial(replicaNo, |
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345 | pPhysical, &parentTouchable) ); |
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346 | return true; |
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347 | } |
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348 | |
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349 | return false; |
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350 | } |
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