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25 //
26 /// \file eventgenerator/particleGun/src/TrackingAction.cc
27 /// \brief Implementation of the TrackingAction class
28 //
29 //
30 //
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "TrackingAction.hh"
35
36 #include "HistoManager.hh"
37 #include "PrimaryGeneratorAction.hh"
38 #include "PrimaryGeneratorAction2.hh"
39 #include "PrimaryGeneratorAction3.hh"
40 #include "PrimaryGeneratorAction4.hh"
41 #include "RunAction.hh"
42
43 #include "G4PhysicalConstants.hh"
44 #include "G4Track.hh"
45
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47
48 TrackingAction::TrackingAction(PrimaryGeneratorAction* prim) : fPrimary(prim)
49 {
50 // parameters for generator action #3
51 fNewUz = fPrimary->GetAction3()->GetNewUz();
52 }
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55
56 void TrackingAction::PreUserTrackingAction(const G4Track* track)
57 {
58 G4int selectedGeneratorAction = fPrimary->GetSelectedAction();
59 G4AnalysisManager* analysis = G4AnalysisManager::Instance();
60 G4int id = 0;
61
62 if (selectedGeneratorAction == 2) {
63 // energy spectrum
64 //
65 id = 1;
66 analysis->FillH1(id, track->GetKineticEnergy());
67 }
68
69 else if (selectedGeneratorAction == 0) {
70 // particle direction: cos(alpha)
71 //
72 id = 5;
73 G4ThreeVector um = track->GetMomentumDirection();
74 G4double cosalpha = um.z();
75 analysis->FillH1(id, cosalpha);
76
77 // particle direction: psi
78 //
79 id = 6;
80 G4double psi = std::atan2(um.y(), um.x());
81 if (psi < 0.) psi += twopi;
82 analysis->FillH1(id, psi);
83 }
84 else if (selectedGeneratorAction == 3) {
85 // particle direction in local frame: cos(alpha)
86 //
87 id = 5;
88 G4ThreeVector um = track->GetMomentumDirection();
89 G4double cosalpha = fNewUz * um;
90 analysis->FillH1(id, cosalpha);
91
92 // particle direction in local frame: psi
93 //
94 id = 6;
95 // complete local frame
96 G4ThreeVector u1(1., 0., 0.);
97 u1.rotateUz(fNewUz);
98 G4ThreeVector u2(0., 1., 0.);
99 u2.rotateUz(fNewUz);
100 //
101 G4double psi = std::atan2(u2 * um, u1 * um);
102 if (psi < 0.) psi += twopi;
103 analysis->FillH1(id, psi);
104 }
105
106 else if (selectedGeneratorAction == 4) {
107 G4ThreeVector vertex = track->GetVertexPosition();
108 G4double r = vertex.mag();
109 if (r <= 0.0) return;
110 // local frame : new uz = ur
111 G4ThreeVector ur = vertex / r;
112
113 // vertex position. radial distribution dN/dv = f(r)
114 //
115 id = 2;
116 G4double dr = analysis->GetH1Width(id);
117 G4double dv = 2 * twopi * r * r * dr;
118 if (dv > 0.) analysis->FillH1(id, r, 1. / dv);
119
120 // vertex position: cos(theta)
121 //
122 id = 3;
123 G4double costheta = ur.z();
124 analysis->FillH1(id, costheta);
125
126 // vertex position: phi
127 //
128 id = 4;
129 G4double phi = std::atan2(ur.y(), ur.x());
130 if (phi < 0.) phi += twopi;
131 analysis->FillH1(id, phi);
132
133 // particle direction in local frame: cos(alpha)
134 //
135 id = 5;
136 G4ThreeVector um = track->GetMomentumDirection();
137 G4double cosalpha = ur * um;
138 analysis->FillH1(id, cosalpha);
139
140 // particle direction in local frame: psi
141 //
142 id = 6;
143 // complete local frame
144 G4ThreeVector u1(1., 0., 0.);
145 u1.rotateUz(ur);
146 G4ThreeVector u2(0., 1., 0.);
147 u2.rotateUz(ur);
148 //
149 G4double psi = std::atan2(u2 * um, u1 * um);
150 if (psi < 0.) psi += twopi;
151 analysis->FillH1(id, psi);
152 }
153 }
154
155 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
156
157 void TrackingAction::PostUserTrackingAction(const G4Track*) {}
158
159 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
160