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: TstVAPrimaryGeneratorAction.cc,v 1.7 2006/06/29 18:34:43 gunter 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 | |
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32 | #include "globals.hh" |
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33 | #include "Randomize.hh" |
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34 | |
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35 | #include "TstVAPrimaryGeneratorAction.hh" |
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36 | |
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37 | #include "TstVAPrimaryGeneratorMessenger.hh" |
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38 | #include "G4Event.hh" |
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39 | #include "G4ParticleGun.hh" |
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40 | #include "G4ParticleTable.hh" |
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41 | #include "G4ParticleDefinition.hh" |
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42 | #include "G4TransportationManager.hh" |
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43 | |
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44 | TstVAPrimaryGeneratorAction::TstVAPrimaryGeneratorAction(): |
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45 | generatorAction (standardGun), |
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46 | particleGun (0), |
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47 | messenger (0), |
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48 | worldVolume (0) |
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49 | { |
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50 | G4int n_particle = 1; |
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51 | particleGun = new G4ParticleGun(n_particle); |
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52 | |
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53 | // default particle |
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54 | |
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55 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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56 | G4String particleName; |
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57 | G4ParticleDefinition* particle |
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58 | = particleTable->FindParticle(particleName="e-"); |
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59 | particleGun->SetParticleDefinition(particle); |
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60 | particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.)); |
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61 | particleGun->SetParticleEnergy(1.*GeV); |
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62 | particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,0.*cm)); |
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63 | |
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64 | // messenger |
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65 | |
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66 | messenger = new TstVAPrimaryGeneratorMessenger (this); |
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67 | |
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68 | // world extent |
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69 | |
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70 | worldVolume = G4TransportationManager::GetTransportationManager () |
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71 | -> GetNavigatorForTracking () -> GetWorldVolume (); |
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72 | if (worldVolume) worldExtent = worldVolume -> GetLogicalVolume () |
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73 | -> GetSolid () -> GetExtent (); |
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74 | |
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75 | } |
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76 | |
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77 | TstVAPrimaryGeneratorAction::~TstVAPrimaryGeneratorAction() |
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78 | { |
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79 | delete particleGun; |
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80 | delete messenger; |
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81 | } |
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82 | |
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83 | void TstVAPrimaryGeneratorAction::SelectPrimaryGeneratorAction |
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84 | (Action action) |
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85 | { |
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86 | generatorAction = action; |
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87 | } |
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88 | |
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89 | void TstVAPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
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90 | { |
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91 | G4VPhysicalVolume* currentWorldVolume; |
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92 | |
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93 | double costheta; |
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94 | double sintheta; |
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95 | double phi; |
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96 | double cosphi; |
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97 | double sinphi; |
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98 | |
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99 | switch (generatorAction) { |
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100 | |
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101 | case standardGun: |
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102 | |
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103 | particleGun->GeneratePrimaryVertex(anEvent); |
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104 | break; |
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105 | |
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106 | case randomDirectionGun: |
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107 | |
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108 | costheta = CLHEP::RandFlat::shoot (-1., 1.); |
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109 | sintheta = std::sqrt (1. - costheta * costheta); |
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110 | phi = CLHEP::RandFlat::shoot (twopi); |
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111 | cosphi = std::cos (phi); |
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112 | sinphi = std::sin (phi); |
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113 | particleGun->SetParticleMomentumDirection |
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114 | (G4ThreeVector (sintheta * cosphi, sintheta * sinphi, costheta)); |
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115 | |
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116 | particleGun->GeneratePrimaryVertex(anEvent); |
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117 | break; |
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118 | |
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119 | case randomPositionGun: |
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120 | |
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121 | // Check if world is in place or has changed. |
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122 | currentWorldVolume = |
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123 | G4TransportationManager::GetTransportationManager () |
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124 | -> GetNavigatorForTracking () -> GetWorldVolume (); |
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125 | if (!worldVolume || worldVolume != currentWorldVolume) { |
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126 | worldVolume = currentWorldVolume; |
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127 | if (worldVolume) worldExtent = worldVolume -> GetLogicalVolume () |
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128 | -> GetSolid () -> GetExtent (); |
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129 | } |
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130 | |
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131 | particleGun->SetParticlePosition |
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132 | (G4ThreeVector |
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133 | (CLHEP::RandFlat::shoot (worldExtent.GetXmin (), worldExtent.GetXmax ()), |
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134 | CLHEP::RandFlat::shoot (worldExtent.GetYmin (), worldExtent.GetYmax ()), |
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135 | CLHEP::RandFlat::shoot (worldExtent.GetZmin (), worldExtent.GetZmax ()))); |
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136 | |
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137 | particleGun->GeneratePrimaryVertex(anEvent); |
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138 | break; |
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139 | |
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140 | case randomPositionAndDirectionGun: |
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141 | |
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142 | // Check if world is in place or has changed. |
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143 | currentWorldVolume = |
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144 | G4TransportationManager::GetTransportationManager () |
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145 | -> GetNavigatorForTracking () -> GetWorldVolume (); |
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146 | if (!worldVolume || worldVolume != currentWorldVolume) { |
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147 | worldVolume = currentWorldVolume; |
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148 | if (worldVolume) worldExtent = worldVolume -> GetLogicalVolume () |
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149 | -> GetSolid () -> GetExtent (); |
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150 | } |
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151 | |
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152 | particleGun->SetParticlePosition |
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153 | (G4ThreeVector |
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154 | (CLHEP::RandFlat::shoot (worldExtent.GetXmin (), worldExtent.GetXmax ()), |
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155 | CLHEP::RandFlat::shoot (worldExtent.GetYmin (), worldExtent.GetYmax ()), |
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156 | CLHEP::RandFlat::shoot (worldExtent.GetZmin (), worldExtent.GetZmax ()))); |
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157 | |
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158 | costheta = CLHEP::RandFlat::shoot (-1., 1.); |
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159 | sintheta = std::sqrt (1. - costheta * costheta); |
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160 | phi = CLHEP::RandFlat::shoot (twopi); |
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161 | cosphi = std::cos (phi); |
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162 | sinphi = std::sin (phi); |
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163 | particleGun->SetParticleMomentumDirection |
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164 | (G4ThreeVector (sintheta * cosphi, sintheta * sinphi, costheta)); |
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165 | |
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166 | particleGun->GeneratePrimaryVertex(anEvent); |
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167 | break; |
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168 | |
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169 | } |
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170 | } |
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