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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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: testG4NavigatorSafety.cc,v 1.6 2010/11/09 10:48:27 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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29 | // |
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30 | // |
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31 | // Create a tubular "calorimeter". Generate random points along x, y & z |
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32 | // axes, printing location, steps & safeties. Compare results of standard |
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33 | // voxel safety calculations with "exact safety" computed values. |
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34 | // |
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35 | // Optional arguments: |
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36 | // - Number of points to generate [Default: 10000] |
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37 | // - Initial random seed modulo 256 [Default: CLHEP default] |
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38 | |
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39 | #include <assert.h> |
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40 | #include "G4ios.hh" |
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41 | #include <stdlib.h> |
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42 | #include <vector> |
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43 | |
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44 | #include "globals.hh" |
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45 | |
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46 | #include "G4Timer.hh" |
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47 | #include "ApproxEqual.hh" |
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48 | |
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49 | #include "G4Navigator.hh" |
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50 | |
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51 | #include "G4LogicalVolume.hh" |
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52 | #include "G4VPhysicalVolume.hh" |
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53 | #include "G4PVPlacement.hh" |
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54 | #include "G4Box.hh" |
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55 | #include "G4Tubs.hh" |
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56 | |
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57 | #include "G4GeometryManager.hh" |
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58 | |
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59 | #include "G4RotationMatrix.hh" |
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60 | #include "G4ThreeVector.hh" |
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61 | #include "Randomize.hh" |
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62 | |
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63 | // Parameters for building a tubular calorimeter: |
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64 | // an array of interlocking complete tubes inside a box |
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65 | // |
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66 | static const G4double kTubeHalfHeight = 10*mm; |
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67 | static const G4double kTubeRadius = 5*mm; |
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68 | static const G4double kTubeNoRow = 10; |
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69 | static const G4double kTubeNoColumn = 11; // Odd for symmetrical array |
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70 | |
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71 | static const G4double kBoxDx=kTubeNoRow*kTubeRadius; |
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72 | static const G4double yDelta=2.0*kTubeRadius*std::sin(pi/3.0); |
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73 | static const G4double kBoxDy=(kTubeNoColumn-1)*yDelta*0.5+kTubeRadius; |
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74 | static const G4double kBoxDz=kTubeHalfHeight; |
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75 | static const G4double kWorldhxsize = kBoxDx+0.1*mm; |
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76 | static const G4double kWorldhysize = kBoxDy+0.1*mm; |
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77 | static const G4double kWorldhzsize = kBoxDz+0.1*mm; |
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78 | |
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79 | G4bool compare = false; |
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80 | std::vector<G4ThreeVector> kPoints; |
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81 | std::vector<std::pair<G4double, G4double> > kSafeties; |
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82 | |
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83 | G4VPhysicalVolume* BuildGeometry() |
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84 | { |
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85 | G4double bigXStart=-(kTubeNoRow-1)*kTubeRadius; |
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86 | G4double smallXStart=bigXStart+kTubeRadius; |
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87 | |
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88 | G4double bigYStart=-(kTubeNoColumn-1)*yDelta*0.5; |
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89 | G4double smallYStart=bigYStart+yDelta; |
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90 | |
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91 | G4int row,column; |
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92 | |
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93 | // Solids ============================== |
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94 | G4Box *worldBox = new G4Box ("World Box",kWorldhxsize,kWorldhysize,kWorldhzsize); |
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95 | // World box |
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96 | |
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97 | G4Box *calBox = new G4Box ("Cal Box",kBoxDx,kBoxDy,kBoxDz); |
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98 | G4Tubs *calTube = new G4Tubs("Cal Tube",0,kTubeRadius,kTubeHalfHeight,0,360); |
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99 | |
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100 | // Logical Volumes ------------------------------ |
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101 | G4LogicalVolume *myWorldLog= |
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102 | new G4LogicalVolume(worldBox,0,"World",0,0,0); |
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103 | // Logical with no material,field, sensitive detector or user limits |
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104 | |
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105 | G4PVPlacement *myWorldPhys= |
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106 | new G4PVPlacement(0,G4ThreeVector(0,0,0),"World",myWorldLog,0,false,0); |
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107 | // World physical volume |
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108 | |
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109 | G4LogicalVolume *myDetectorLog= |
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110 | new G4LogicalVolume(calBox,0,"DetectorLog",0,0,0); |
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111 | // Logical with no material,field, sensitive detector or user limits |
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112 | |
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113 | G4PVPlacement *myDetectorPhys= |
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114 | new G4PVPlacement(0,G4ThreeVector(0,0,0),"DetectorPhys", |
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115 | myDetectorLog,myWorldPhys,false,0); |
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116 | // Detector physical volume placed in the world |
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117 | |
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118 | G4LogicalVolume *calTubLog= |
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119 | new G4LogicalVolume(calTube,0,"Cal Crystal",0,0,0); |
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120 | |
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121 | G4String tname("Target"); |
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122 | G4int copyNo=0; |
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123 | for (column=0;column<kTubeNoColumn;column+=2) |
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124 | { |
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125 | for (row=0;row<kTubeNoRow;row++) |
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126 | { |
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127 | // G4PVPlacement *calPhys= |
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128 | new G4PVPlacement(0,G4ThreeVector(bigXStart+row*kTubeRadius*2.0, |
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129 | bigYStart+column*yDelta,0), |
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130 | tname,calTubLog,myDetectorPhys,false,copyNo++); |
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131 | } |
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132 | } |
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133 | for (column=0;column<kTubeNoColumn-1;column+=2) |
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134 | { |
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135 | for (row=0;row<kTubeNoRow-1;row++) |
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136 | { |
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137 | // G4PVPlacement *calPhys= |
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138 | new G4PVPlacement(0,G4ThreeVector(smallXStart+row*kTubeRadius*2.0, |
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139 | smallYStart+column*yDelta), |
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140 | tname,calTubLog,myDetectorPhys,false,copyNo++); |
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141 | } |
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142 | } |
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143 | return myWorldPhys; |
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144 | } |
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145 | |
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146 | void generatePoints(G4int n) |
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147 | { |
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148 | for (int i=0; i<n; i++) |
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149 | { |
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150 | G4ThreeVector p(CLHEP::RandFlat::shoot(-kWorldhxsize,kWorldhxsize), |
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151 | CLHEP::RandFlat::shoot(-kWorldhysize,kWorldhysize), |
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152 | CLHEP::RandFlat::shoot(-kWorldhzsize,kWorldhzsize)); |
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153 | kPoints.push_back(p); |
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154 | } |
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155 | } |
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156 | |
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157 | void computeApproxSafeties(G4VPhysicalVolume *pTopNode) |
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158 | { |
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159 | MyNavigator myNav; |
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160 | myNav.SetWorldVolume(pTopNode); |
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161 | std::vector<G4ThreeVector>::const_iterator pos; |
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162 | for (pos=kPoints.begin(); pos!=kPoints.end(); pos++) |
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163 | { |
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164 | myNav.LocateGlobalPointAndSetup(*pos); |
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165 | G4double safety = myNav.ComputeSafety(*pos); |
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166 | std::pair<G4double,G4double> s(safety,0.); |
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167 | kSafeties.push_back(s); |
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168 | } |
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169 | } |
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170 | |
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171 | void computeExactSafeties(G4VPhysicalVolume *pTopNode) |
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172 | { |
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173 | G4int i=0; |
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174 | G4VPhysicalVolume *pPhysVol=0; |
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175 | |
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176 | MyNavigator myNav; |
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177 | myNav.SetWorldVolume(pTopNode); |
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178 | |
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179 | // Enable use of Best Safety Estimate -- ie as exact as solids allow |
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180 | myNav.UseBestSafety( true ); |
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181 | |
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182 | myNav.SetVerboseLevel( 1 ); |
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183 | myNav.CheckMode( true ); |
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184 | |
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185 | G4ThreeVector center( 0., 0., 0. ); |
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186 | G4cout << " Trial point= " << center << G4endl; |
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187 | pPhysVol= myNav.LocateGlobalPointAndSetup( center ); |
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188 | // G4double saf= myNav.ComputeSafety( center ); |
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189 | |
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190 | std::vector<G4ThreeVector>::const_iterator pos; |
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191 | for (pos=kPoints.begin(); pos!=kPoints.end(); pos++) |
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192 | { |
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193 | G4cout << " Trial point= " << *pos << G4endl; |
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194 | // Relocate point |
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195 | pPhysVol= myNav.LocateGlobalPointAndSetup(*pos); |
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196 | |
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197 | G4cout << G4endl; |
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198 | G4cout << " ============================================== " << G4endl; |
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199 | G4cout << " Calculating 'exact' safety for " << *pos << G4endl; |
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200 | G4double safety = myNav.ComputeSafety(*pos); |
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201 | kSafeties[i].second = safety; |
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202 | |
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203 | G4cout << " Old safety = " << kSafeties[i].first << G4endl; |
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204 | G4cout << " Exact safety = " << safety << G4endl; |
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205 | |
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206 | i++; |
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207 | } |
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208 | compare = true; |
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209 | } |
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210 | |
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211 | void compareSafeties() |
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212 | { |
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213 | G4int n = kPoints.size(); |
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214 | if (!compare) |
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215 | { |
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216 | G4cout << "Printing out non-zero safety values computed ..." << G4endl; |
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217 | for (G4int i=0; i<n; i++) |
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218 | { |
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219 | G4double safety = kSafeties[i].first; |
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220 | if (safety) |
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221 | { |
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222 | G4cout << i << ". - Point: " << kPoints[i] |
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223 | << " - Safety: " << safety << G4endl; |
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224 | } |
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225 | } |
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226 | } |
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227 | else |
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228 | { |
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229 | G4int diffs=0; |
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230 | G4cout << "Printing out cases of different safety values ..." << G4endl; |
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231 | for (G4int i=0; i<n; i++) |
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232 | { |
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233 | if (kSafeties[i].first != kSafeties[i].second) |
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234 | { |
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235 | G4cout << i << ". - Point: " << kPoints[i] |
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236 | << " - Approx safety: " << kSafeties[i].first |
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237 | << " - Exact safety: " << kSafeties[i].second << G4endl; |
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238 | diffs++; |
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239 | } |
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240 | } |
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241 | G4cout << "Total number of differences: " << diffs << G4endl; |
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242 | } |
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243 | } |
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244 | |
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245 | int main(int argc, char* argv[]) |
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246 | { |
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247 | G4Timer timer; |
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248 | G4int iter=10000; |
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249 | |
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250 | if (argc==2) |
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251 | { |
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252 | G4int num = atoi(argv[1]); |
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253 | if (num>=0) { iter = num; } |
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254 | else { G4cout << ">>> Invalid number of iterations in input!" << G4endl |
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255 | << " Sticking to: " << iter << " ..." << G4endl; } |
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256 | } |
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257 | else if (argc==3) |
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258 | { |
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259 | G4int num = atoi(argv[1]); |
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260 | if (num>=0) { iter = num; } |
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261 | else { G4cout << ">>> Invalid number of iterations in input!" << G4endl |
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262 | << " Sticking to: " << iter << " ..." << G4endl; } |
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263 | G4long seed = atoi(argv[2]); |
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264 | if (seed>0) { CLHEP::HepRandom::setTheSeed(seed); } |
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265 | else { G4cout << ">>> Invalid negative random seed in input!" << G4endl |
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266 | << " Sticking to default: " |
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267 | << CLHEP::HepRandom::getTheSeed() << " ..." << G4endl; } |
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268 | } |
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269 | |
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270 | G4VPhysicalVolume *myTopNode; |
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271 | myTopNode=BuildGeometry(); // Build the geometry |
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272 | // Do not close the geometry --> the voxels will limit safety |
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273 | |
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274 | timer.Start(); |
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275 | |
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276 | generatePoints(iter); |
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277 | |
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278 | computeApproxSafeties(myTopNode); |
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279 | |
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280 | G4GeometryManager::GetInstance()->CloseGeometry(); // Voxelise the geometry |
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281 | computeExactSafeties(myTopNode); |
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282 | |
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283 | // Check |
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284 | compareSafeties(); |
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285 | |
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286 | timer.Stop(); |
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287 | |
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288 | G4cout << timer << G4endl; |
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289 | |
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290 | G4GeometryManager::GetInstance()->OpenGeometry(); |
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291 | |
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292 | return 0; |
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293 | } |
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