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: SCPrimaryGeneratorAction.cc,v 1.8 2006/12/13 15:43:52 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
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29 | // |
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30 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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31 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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32 | |
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33 | #include "Randomize.hh" |
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34 | |
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35 | #include "SCPrimaryGeneratorAction.hh" |
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36 | #include "SCDetectorConstruction.hh" |
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37 | |
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38 | #include "SCSurfacePoint.hh" |
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39 | #include "G4Event.hh" |
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40 | #include "G4ParticleGun.hh" |
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41 | #include "G4ParticleTable.hh" |
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42 | #include "G4ParticleDefinition.hh" |
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43 | #include "globals.hh" |
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44 | |
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45 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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46 | SurfacePoint spoint ; |
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47 | |
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48 | SCPrimaryGeneratorAction::SCPrimaryGeneratorAction( |
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49 | SCDetectorConstruction* myDC) |
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50 | :myDetector(myDC) |
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51 | { |
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52 | G4int n_particle = 1; |
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53 | particleGun = new G4ParticleGun(n_particle); |
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54 | |
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55 | // default particle |
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56 | |
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57 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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58 | G4ParticleDefinition* particle = particleTable->FindParticle("geantino"); |
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59 | |
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60 | particleGun->SetParticleDefinition(particle); |
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61 | |
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62 | } |
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63 | |
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64 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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65 | |
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66 | SCPrimaryGeneratorAction::~SCPrimaryGeneratorAction() |
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67 | { |
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68 | delete particleGun; |
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69 | } |
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70 | |
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71 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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72 | |
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73 | void SCPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
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74 | { |
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75 | |
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76 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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77 | G4String particleName; |
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78 | G4ParticleDefinition* aParticleDefinition |
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79 | = particleTable->FindParticle(particleName="geantino"); |
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80 | |
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81 | // create a new vertex in a random position |
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82 | |
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83 | G4int i = anEvent->GetEventID() ; |
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84 | |
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85 | G4ThreeVector VertexPosition (GetRandomPosition()); |
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86 | G4PrimaryVertex* aVertex = new G4PrimaryVertex( VertexPosition, 0); |
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87 | |
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88 | G4double u,v ; |
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89 | |
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90 | G4ThreeVector aSurfacePoint (GetSurfacePoint(u,v)) ; // point A on surface |
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91 | G4ThreeVector aNormal(1,0,0) ; // normal vector |
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92 | |
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93 | G4ThreeVector m = (aSurfacePoint-VertexPosition).unit() ; // direction |
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94 | |
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95 | G4double distance = ( aSurfacePoint - VertexPosition ).mag() ; |
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96 | G4double theta = std::acos(m.unit()*aNormal) ; |
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97 | |
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98 | spoint.SetSurfacePoint(aSurfacePoint) ; |
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99 | |
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100 | G4PrimaryParticle* aPrimaryParticle = |
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101 | new G4PrimaryParticle(aParticleDefinition, m.x(), m.y(), m.z()); |
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102 | aPrimaryParticle->SetMass (0.); |
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103 | |
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104 | aVertex->SetPrimary( aPrimaryParticle ); |
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105 | |
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106 | G4cout << "Event " << i << G4endl |
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107 | << "Vertex " << VertexPosition << " " << u << " " << v << G4endl |
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108 | << "Surface " << aSurfacePoint << G4endl |
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109 | << "Distance " << distance << G4endl |
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110 | << "Momentum " << m << G4endl |
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111 | << "Angle " << theta |
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112 | << G4endl ; |
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113 | |
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114 | anEvent->AddPrimaryVertex( aVertex ); |
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115 | |
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116 | |
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117 | } |
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118 | |
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119 | |
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120 | G4ThreeVector SCPrimaryGeneratorAction::GetRandomDirection() { |
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121 | |
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122 | G4ThreeVector retval; |
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123 | |
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124 | G4double CosTheta; |
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125 | G4double SinTheta; |
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126 | |
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127 | G4double Phi; |
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128 | G4double SinPhi; |
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129 | G4double CosPhi; |
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130 | |
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131 | G4double rand; |
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132 | |
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133 | rand = G4UniformRand(); |
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134 | |
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135 | CosTheta = 2.0*rand -1.0; |
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136 | SinTheta = std::sqrt (1.-CosTheta*CosTheta); |
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137 | rand = G4UniformRand(); |
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138 | Phi = twopi*rand; |
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139 | SinPhi = std::sin (Phi); |
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140 | CosPhi = std::cos (Phi); |
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141 | retval.setX(SinTheta*CosPhi); |
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142 | retval.setY(SinTheta*SinPhi); |
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143 | retval.setZ(CosTheta); |
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144 | |
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145 | return retval; |
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146 | } |
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147 | |
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148 | G4ThreeVector SCPrimaryGeneratorAction::GetRandomPosition() |
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149 | { |
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150 | |
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151 | G4double a = 0.5*myDetector->GetWorldFullLength(); |
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152 | |
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153 | G4double x = ( G4UniformRand()*2 - 1 )*a; |
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154 | G4double y = ( G4UniformRand()*2 - 1 )*a; |
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155 | G4double z = ( G4UniformRand()*2 - 1 )*a; |
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156 | |
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157 | G4ThreeVector retval (x, y, z); |
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158 | |
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159 | return retval; |
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160 | } |
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161 | |
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162 | G4ThreeVector SCPrimaryGeneratorAction::GetSurfacePoint(G4double &, G4double &) |
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163 | { |
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164 | |
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165 | |
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166 | G4String val = myDetector->GetDetectorType() ; |
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167 | |
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168 | |
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169 | return myDetector->GetSolid()->GetPointOnSurface() ; |
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170 | |
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171 | |
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172 | } |
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173 | |
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174 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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175 | |
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