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25 //
26 // G4HEPEvtInterface class implementation
27 //
28 // Author: Makoto Asai, 1997
29 // --------------------------------------------------------------------
30
31 #include "G4HEPEvtInterface.hh"
32
33 #include "G4Types.hh"
34 #include "G4SystemOfUnits.hh"
35
36 #include "G4ios.hh"
37 #include "G4PrimaryVertex.hh"
38 #include "G4PrimaryParticle.hh"
39 #include "G4HEPEvtParticle.hh"
40 #include "G4Event.hh"
41
42 G4HEPEvtInterface::G4HEPEvtInterface(const char* evfile, G4int vl)
43 : vLevel(vl)
44 {
45 inputFile.open((char*)evfile);
46 if (inputFile.is_open())
47 {
48 fileName = evfile;
49 if(vl>0)
50 G4cout << "G4HEPEvtInterface - " << fileName << " is open." << G4endl;
51 }
52 else
53 {
54 G4Exception("G4HEPEvtInterface::G4HEPEvtInterface","Event0201",
55 FatalException, "G4HEPEvtInterface:: cannot open file.");
56 }
57 G4ThreeVector zero;
58 particle_position = zero;
59 particle_time = 0.0;
60 }
61
62 void G4HEPEvtInterface::GeneratePrimaryVertex(G4Event* evt)
63 {
64 G4int NHEP = 0; // number of entries
65 if (inputFile.is_open())
66 {
67 inputFile >> NHEP;
68 }
69 else
70 {
71 G4Exception("G4HEPEvtInterface::G4HEPEvtInterface","Event0201",
72 FatalException, "G4HEPEvtInterface:: cannot open file.");
73 }
74 if( inputFile.eof() )
75 {
76 G4Exception("G4HEPEvtInterface::GeneratePrimaryVertex", "Event0202",
77 RunMustBeAborted,
78 "End-Of-File: HEPEvt input file -- no more event to read!");
79 return;
80 }
81
82 if(vLevel > 0)
83 {
84 G4cout << "G4HEPEvtInterface - reading " << NHEP
85 << " HEPEvt particles from " << fileName << "." << G4endl;
86 }
87 for( G4int IHEP=0; IHEP<NHEP; ++IHEP )
88 {
89 G4int ISTHEP; // status code
90 G4int IDHEP; // PDG code
91 G4int JDAHEP1; // first daughter
92 G4int JDAHEP2; // last daughter
93 G4double PHEP1; // px in GeV
94 G4double PHEP2; // py in GeV
95 G4double PHEP3; // pz in GeV
96 G4double PHEP5; // mass in GeV
97
98 inputFile >> ISTHEP >> IDHEP >> JDAHEP1 >> JDAHEP2
99 >> PHEP1 >> PHEP2 >> PHEP3 >> PHEP5;
100 if( inputFile.eof() )
101 {
102 G4Exception("G4HEPEvtInterface::GeneratePrimaryVertex", "Event0203",
103 FatalException,
104 "Unexpected End-Of-File in the middle of an event");
105 }
106 if(vLevel > 1)
107 {
108 G4cout << " " << ISTHEP << " " << IDHEP << " " << JDAHEP1
109 << " " << JDAHEP2 << " " << PHEP1 << " " << PHEP2
110 << " " << PHEP3 << " " << PHEP5 << G4endl;
111 }
112
113 // Create G4PrimaryParticle object
114 //
115 auto* particle = new G4PrimaryParticle( IDHEP );
116 particle->SetMass( PHEP5*GeV );
117 particle->SetMomentum(PHEP1*GeV, PHEP2*GeV, PHEP3*GeV );
118
119 // Create G4HEPEvtParticle object
120 //
121 auto* hepParticle
122 = new G4HEPEvtParticle( particle, ISTHEP, JDAHEP1, JDAHEP2 );
123
124 // Store
125 //
126 HPlist.push_back( hepParticle );
127 }
128
129 // Check if there is at least one particle
130 //
131 if( HPlist.empty() ) return;
132
133 // Make connection between daughter particles decayed from the same mother
134 //
135 for(auto & i : HPlist)
136 {
137 if( i->GetJDAHEP1() > 0 ) // it has daughters
138 {
139 G4int jda1 = i->GetJDAHEP1()-1; // FORTRAN index starts from 1
140 G4int jda2 = i->GetJDAHEP2()-1; // but C++ starts from 0.
141 G4PrimaryParticle* mother = i->GetTheParticle();
142 for( G4int j=jda1; j<=jda2; ++j )
143 {
144 G4PrimaryParticle* daughter = HPlist[j]->GetTheParticle();
145 if(HPlist[j]->GetISTHEP()>0)
146 {
147 mother->SetDaughter( daughter );
148 HPlist[j]->Done();
149 }
150 }
151 }
152 }
153
154 // Create G4PrimaryVertex object
155 //
156 auto* vertex = new G4PrimaryVertex(particle_position,particle_time);
157
158 // Put initial particles to the vertex
159 //
160 for(auto & ii : HPlist)
161 {
162 if( ii->GetISTHEP() > 0 ) // ISTHEP of daughters had been
163 // set to negative
164 {
165 G4PrimaryParticle* initialParticle = ii->GetTheParticle();
166 vertex->SetPrimary( initialParticle );
167 }
168 }
169
170 // Clear G4HEPEvtParticles
171 //
172 for(auto & iii : HPlist)
173 {
174 delete iii;
175 }
176 HPlist.clear();
177
178 // Put the vertex to G4Event object
179 //
180 evt->AddPrimaryVertex( vertex );
181 }
182