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Dicom2PrimaryGeneratorAction.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file Dicom2PrimaryGeneratorAction.cc
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29 
32 
33 #include "G4LogicalVolumeStore.hh"
34 #include "G4PhysicalVolumeStore.hh"
35 #include "G4LogicalVolume.hh"
36 #include "G4VPhysicalVolume.hh"
37 #include "G4Box.hh"
38 #include "G4RunManager.hh"
39 #include "G4ParticleGun.hh"
40 #include "G4ParticleTable.hh"
41 #include "G4ParticleDefinition.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "Randomize.hh"
44 #include "G4RandomDirection.hh"
45 #include "G4UnitsTable.hh"
46 
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
48 
51  fParticleGun(new G4ParticleGun(1)),
52  fEnvelopeBox(nullptr),
53  fEnvelopeVol(nullptr),
54  fPosCenter(G4ThreeVector(0.0)),
55  fPosDelta(G4ThreeVector(0.0)),
56  fGeomFactor(0.8)
57 {
58  // default particle kinematic
60  G4String particleName;
62  = particleTable->FindParticle(particleName="e-");
66 }
67 
68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69 
71 {
72  delete fParticleGun;
73 }
74 
75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
76 
78 {
79  //this function is called at the begining of ecah event
80  //
81 
82  // In order to avoid dependence of PrimaryGeneratorAction
83  // on DetectorConstruction class we get phantomContainer volume
84  // from G4LogicalVolumeStore.
85  if (!fEnvelopeBox)
86  {
87  G4LogicalVolume* envLV
88  = G4LogicalVolumeStore::GetInstance()->GetVolume("phantomContainer");
89  if(envLV)
90  fEnvelopeBox = dynamic_cast<G4Box*>(envLV->GetSolid());
91  }
92 
93  if(!fEnvelopeVol)
94  {
96  }
97 
98  // get the center of the phantom
99  if(fEnvelopeVol)
100  {
102  }
103  else
104  {
106  msg << "Envelope physical volume not found.\n";
107  msg << "The gun will be place at the center.";
108  G4Exception("Dicom2PrimaryGeneratorAction::GeneratePrimaries()",
109  "DICOM20002",JustWarning, msg);
110  }
111 
112  // get the size of the phantom
113  if(fEnvelopeBox)
114  {
116  2.0 * fEnvelopeBox->GetYHalfLength(),
117  2.0 * fEnvelopeBox->GetZHalfLength());
118  }
119  else
120  {
122  msg << "Envelope volume of box shape not found.\n";
123  msg << "The gun will be place at the center.";
124  G4Exception("Dicom2PrimaryGeneratorAction::GeneratePrimaries()",
125  "DICOM20003",JustWarning, msg);
126  }
127 
128  // start at center
130  // get a random displacement
132  fPosDelta.y() * (G4UniformRand()-0.5),
133  fPosDelta.z() * (G4UniformRand()-0.5));
134  // scale by geom factor
135  delta *= fGeomFactor;
136 
137  //G4cout << "Starting position: " << G4BestUnit(pos + delta, "Length")
138  // << ", pos = " << G4BestUnit(fPosCenter, "Length")
139  // << ", size = " << G4BestUnit(fPosDelta, "Length")
140  // << ", delta = " << G4BestUnit(delta, "Length")
141  // << G4endl;
142 
143  fParticleGun->SetParticlePosition(pos + delta);
146 }
147 
148 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
149