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25 //
26 /// \file medical/dna/range/src/PrimaryGeneratorAction.cc
27 /// \brief Implementation of the PrimaryGeneratorAction class
28 //
29 // $Id: PrimaryGeneratorAction.cc 73024 2013-08-15 09:11:40Z gcosmo $
30 //
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "PrimaryGeneratorAction.hh"
35
36 #include "DetectorConstruction.hh"
37
38 #include "G4Electron.hh"
39 #include "G4Event.hh"
40 #include "G4Gamma.hh"
41 #include "G4ParticleDefinition.hh"
42 #include "G4ParticleGun.hh"
43 #include "G4ParticleTable.hh"
44 #include "G4PhysicalConstants.hh"
45 #include "G4RandomDirection.hh"
46 #include "G4RunManager.hh"
47 #include "G4StateManager.hh"
48 #include "G4SystemOfUnits.hh"
49 #include "Randomize.hh"
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52
53 PrimaryGeneratorAction::PrimaryGeneratorAction()
54 : G4VUserPrimaryGeneratorAction(), G4VStateDependent(), fParticleGun(0), fDetector(0)
55 {
56 fDetector = dynamic_cast<const DetectorConstruction*>(
57 G4RunManager::GetRunManager()->GetUserDetectorConstruction());
58 G4int n_particle = 1;
59 fParticleGun = new G4ParticleGun(n_particle);
60 }
61
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
63
64 PrimaryGeneratorAction::~PrimaryGeneratorAction()
65 {
66 G4StateManager::GetStateManager()->DeregisterDependent(this);
67 if (fParticleGun) delete fParticleGun;
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71
72 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
73 {
74 G4double R = fDetector->GetNPRadius();
75 G4double Ryz = 9999;
76
77 // G4ParticleDefinition *particle = G4Electron::ElectronDefinition();
78 // fParticleGun->SetParticleDefinition(particle);
79
80 G4double scale = 1.;
81
82 G4double xpos = 0, ypos = 0, zpos = 0;
83 while (!(Ryz < R)) {
84 ypos = (2. * G4UniformRand() - 1.) * R;
85 zpos = (2. * G4UniformRand() - 1.) * R;
86 Ryz = std::sqrt(ypos * ypos + zpos * zpos);
87 }
88 xpos = std::sqrt(R * R - (ypos * ypos + zpos * zpos));
89 fParticleGun->SetParticlePosition(G4ThreeVector(-xpos * scale, ypos * scale, zpos * scale));
90 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1, 0, 0));
91
92 fParticleGun->GeneratePrimaryVertex(anEvent);
93 }
94
95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
96
97 G4bool PrimaryGeneratorAction::Notify(G4ApplicationState requestedState)
98 {
99 if (requestedState == G4State_Idle) {
100 if (fParticleGun != 0) return true;
101 G4double R = fDetector->GetNPRadius();
102 G4double Ryz = 9999;
103 ;
104
105 // G4ParticleDefinition *particle = G4Electron::ElectronDefinition();
106 // fParticleGun->SetParticleDefinition(particle);
107
108 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(-1, 0, 0));
109
110 while (!(Ryz < R)) {
111 G4double ypos = (2. * G4UniformRand() - 1.) * R;
112 G4double zpos = (2. * G4UniformRand() - 1.) * R;
113 Ryz = std::sqrt(ypos * ypos + zpos * zpos);
114 G4double xpos = std::sqrt(R * R - (ypos * ypos + zpos * zpos));
115 fParticleGun->SetParticlePosition(G4ThreeVector(-xpos, ypos, zpos));
116 }
117 // fParticleGun->SetParticlePosition(G4ThreeVector(-Xposition,0,0));
118 // fParticleGun->GeneratePrimaryVertex(anEvent);
119 }
120
121 return true;
122 }
123