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25 //
26 /// \file eventgenerator/HepMC/HepMCEx01/src/HepMCG4Interface.cc
27 /// \brief Implementation of the HepMCG4Interface class
28 //
29 //
30
31 #include "HepMCG4Interface.hh"
32
33 #include "G4Event.hh"
34 #include "G4LorentzVector.hh"
35 #include "G4PhysicalConstants.hh"
36 #include "G4PrimaryParticle.hh"
37 #include "G4PrimaryVertex.hh"
38 #include "G4RunManager.hh"
39 #include "G4SystemOfUnits.hh"
40 #include "G4TransportationManager.hh"
41
42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 HepMCG4Interface::HepMCG4Interface() : hepmcEvent(0) {}
44
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 HepMCG4Interface::~HepMCG4Interface()
47 {
48 delete hepmcEvent;
49 }
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 G4bool HepMCG4Interface::CheckVertexInsideWorld(const G4ThreeVector& pos) const
53 {
54 G4Navigator* navigator =
55 G4TransportationManager::GetTransportationManager()->GetNavigatorForTracking();
56
57 G4VPhysicalVolume* world = navigator->GetWorldVolume();
58 G4VSolid* solid = world->GetLogicalVolume()->GetSolid();
59 EInside qinside = solid->Inside(pos);
60
61 if (qinside != kInside)
62 return false;
63 else
64 return true;
65 }
66
67 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
68 void HepMCG4Interface::HepMC2G4(const HepMC::GenEvent* hepmcevt, G4Event* g4event)
69 {
70 for (HepMC::GenEvent::vertex_const_iterator vitr = hepmcevt->vertices_begin();
71 vitr != hepmcevt->vertices_end(); ++vitr)
72 { // loop for vertex ...
73
74 // real vertex?
75 G4bool qvtx = false;
76 for (HepMC::GenVertex::particle_iterator pitr = (*vitr)->particles_begin(HepMC::children);
77 pitr != (*vitr)->particles_end(HepMC::children); ++pitr)
78 {
79 if (!(*pitr)->end_vertex() && (*pitr)->status() == 1) {
80 qvtx = true;
81 break;
82 }
83 }
84 if (!qvtx) continue;
85
86 // check world boundary
87 HepMC::FourVector pos = (*vitr)->position();
88 G4LorentzVector xvtx(pos.x(), pos.y(), pos.z(), pos.t());
89 if (!CheckVertexInsideWorld(xvtx.vect() * mm)) continue;
90
91 // create G4PrimaryVertex and associated G4PrimaryParticles
92 G4PrimaryVertex* g4vtx =
93 new G4PrimaryVertex(xvtx.x() * mm, xvtx.y() * mm, xvtx.z() * mm, xvtx.t() * mm / c_light);
94
95 for (HepMC::GenVertex::particle_iterator vpitr = (*vitr)->particles_begin(HepMC::children);
96 vpitr != (*vitr)->particles_end(HepMC::children); ++vpitr)
97 {
98 if ((*vpitr)->status() != 1) continue;
99
100 G4int pdgcode = (*vpitr)->pdg_id();
101 pos = (*vpitr)->momentum();
102 G4LorentzVector p(pos.px(), pos.py(), pos.pz(), pos.e());
103 G4PrimaryParticle* g4prim =
104 new G4PrimaryParticle(pdgcode, p.x() * GeV, p.y() * GeV, p.z() * GeV);
105
106 g4vtx->SetPrimary(g4prim);
107 }
108 g4event->AddPrimaryVertex(g4vtx);
109 }
110 }
111
112 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113 HepMC::GenEvent* HepMCG4Interface::GenerateHepMCEvent()
114 {
115 HepMC::GenEvent* aevent = new HepMC::GenEvent();
116 return aevent;
117 }
118
119 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
120 void HepMCG4Interface::GeneratePrimaryVertex(G4Event* anEvent)
121 {
122 // delete previous event object
123 delete hepmcEvent;
124
125 // generate next event
126 hepmcEvent = GenerateHepMCEvent();
127 if (!hepmcEvent) {
128 G4cout << "HepMCInterface: no generated particles. run terminated..." << G4endl;
129 G4RunManager::GetRunManager()->AbortRun();
130 return;
131 }
132 HepMC2G4(hepmcEvent, anEvent);
133 }
134