TEvtGen/THepMCParser.cxx

   1 // module identifier line...
   2 // Author: Brian Thorsbro, 24/6-2014
   3
   4 #include <iostream>
   5 #include <sstream>
   6 #include <string>
   7 #include <list>
   8 #include <set>
   9 #include <time.h>
  10
  11 #include "THepMCParser.h"
  12 #include "HepMC/IO_GenEvent.h"
  13 #include "TObject.h"
  14 #include "TTree.h"
  15 #include "TClonesArray.h"
  16 #include "TFile.h"
  17 #include "TParticle.h"
  18 #include "TDatabasePDG.h"
  19
  20 using namespace std;
  21
  22
  23 THepMCParser::THepMCParser(const char * infile) : fTree(0)
  24 {
  25    HepMC::IO_BaseClass * events = new HepMC::IO_GenEvent(infile, std::ios::in);
  26    init(events);
  27    delete events;
  28    events = 0; // nullptr
  29 }
  30 THepMCParser::THepMCParser(HepMC::IO_BaseClass * events) : fTree(0)
  31 {
  32    init(events);
  33 }
  34 void THepMCParser::init(HepMC::IO_BaseClass * events)
  35 {
  36    int particlecount = 0;
  37    fTree = new TTree("treeEPOS","Tree EPOS");
  38    TClonesArray * array = new TClonesArray("TParticle");
  39    // array->BypassStreamer();
  40    fTree->Branch("Particles",&array); // more flags?
  41    THepMCParser::HeavyIonHeader_t heavyIonHeader;
  42    fTree->Branch("HeavyIonInfo", &heavyIonHeader, THepMCParser::fgHeavyIonHeaderBranchString);
  43    THepMCParser::PdfHeader_t pdfHeader;
  44    fTree->Branch("PdfInfo", &pdfHeader, THepMCParser::fgPdfHeaderBranchString);
  45    HepMC::GenEvent* evt =  0; // nullptr
  46    while ((evt = events->read_next_event())) {
  47       string errMsg1 = ParseGenEvent2TCloneArray(evt,array);
  48       string errMsg2 = ParseGenEvent2HeaderStructs(evt,heavyIonHeader,pdfHeader);
  49       if (errMsg1.length() == 0 && errMsg2.length() == 0) {
  50          fTree->Fill();
  51       } else {
  52          if (errMsg1.length() != 0) cerr << errMsg1 << endl;
  53          if (errMsg2.length() != 0) cerr << errMsg2 << endl;
  54       }
  55       particlecount += array->Capacity();
  56    }
  57 //   array->Clear();
  58 //   delete array;
  59 //   array = 0; // nullptr
  60    cout << " parsed " << particlecount << " particles" << endl;
  61 }
  62
  63
  64 TTree * THepMCParser::GetTTree()
  65 {
  66    return fTree;
  67 }
  68 void THepMCParser::WriteTTreeToFile(const char *outfile)
  69 {
  70    TFile * f = new TFile(outfile, "recreate");
  71    fTree->Write();
  72    delete f;
  73    f = 0; // nullptr
  74 }
  75
  76
  77
  78 // Based on a validator written by Peter Hristov, CERN
  79 bool THepMCParser::IsValidMotherDaughtersConsitency(bool useStdErr, bool requireSecondMotherBeforeDaughters)
  80 {
  81    bool valid = true;
  82    TClonesArray * array = new TClonesArray("TParticle");
  83    TBranch* branch = fTree->GetBranch("Particles");
  84    branch->SetAddress(&array);
  85    Int_t count = branch->GetEntries();
  86    for (Int_t idx=0; idx<count; ++idx) {
  87       array->Clear();
  88       branch->GetEntry(idx); // "fill" the array
  89       Int_t nkeep = array->GetEntriesFast();
  90       for (Int_t i=0; i<nkeep; i++) {
  91          TParticle * part = (TParticle*)array->AddrAt(i);
  92          Int_t mum1 = part->GetFirstMother();
  93          Int_t mum2 = part->GetSecondMother();
  94          Int_t fd = part->GetFirstDaughter();
  95          Int_t ld = part->GetLastDaughter();
  96          if (mum1>-1 && i<mum1) {
  97             valid = false;
  98             if (useStdErr) cerr << "Problem: first_mother(" << mum1 << ") after daughter(" << i << ")" << endl;
  99          }
 100          if (mum2>-1 && i<mum2 && requireSecondMotherBeforeDaughters) {
 101             valid = false;
 102             if (useStdErr) cerr << "Problem: second_mother(" << mum2 << ") after daughter(" << i << ")" << endl;
 103          }
 104          if (fd > ld ) {
 105             valid = false;
 106             if (useStdErr) cerr << "Problem: first_daughter(" << fd << ") > last_daughter(" << ld << ")" << endl;
 107          }
 108          for (Int_t id=TMath::Max(fd,0); id<=ld; id++) {
 109             TParticle * daughter = (TParticle*)array->AddrAt(id);
 110             if (daughter->GetFirstMother() != i && daughter->GetSecondMother() != i) {
 111                valid = false;
 112                if (useStdErr) cerr << "Problem: mother("<< i << ") not registered as mother for either first_daughter("
 113                      << daughter->GetFirstMother() << ") or second_daughter("
 114                      << daughter->GetSecondMother() << ")" << endl;
 115             }
 116          }
 117       }
 118    }
 119    delete array;
 120    array = 0;
 121    return valid;
 122 }
 123
 124 bool THepMCParser::IsValidParticleInvariantMass(bool useStdErr, bool includeStatusCode2Particles)
 125 {
 126    bool valid = true;
 127    TClonesArray *array = new TClonesArray("TParticle");
 128    TBranch* branch = fTree->GetBranch("Particles");
 129    branch->SetAddress(&array);
 130    Int_t count = branch->GetEntries();
 131    for (Int_t idx=0; idx<count; ++idx) {
 132       array->Clear();
 133       branch->GetEntry(idx);
 134       Int_t nkeep = array->GetEntries();
 135       for (Int_t i=0; i<nkeep; i++) {
 136          TParticle * parton = (TParticle*)array->AddrAt(i);
 137          if (parton->GetStatusCode()==2 && !includeStatusCode2Particles) {
 138             continue;
 139          }
 140          TLorentzVector v;
 141          parton->Momentum(v);
 142          Double_t m1 = v.M(); // invariant mass from the particle in the HepMC event
 143          TParticlePDG *dbParton = parton->GetPDG();
 144          if (!dbParton) {
 145             if (useStdErr) cerr << "Warning: could not look up particle with PDG Code: " << parton->GetPdgCode() << endl << endl;
 146             continue;
 147          }
 148          Double_t m2 = dbParton->Mass();
 149          bool checkok;
 150          if (m2 == 0) {
 151             checkok = abs(m1) < 0.0001; // no such thing as negative mass...
 152          } else {
 153             checkok = abs(1 - m1/m2) < 0.01;
 154          }
 155          if (!checkok && useStdErr) {
 156             cerr << "Problem: " << GetParticleName(parton) << " HepMC:" << m1 << endl;
 157             cerr << ListReactionChain(array,i);
 158             cerr << endl;
 159          }
 160          if (!checkok)
 161             valid = false;
 162       }
 163    }
 164    delete array;
 165    array = 0;
 166    return valid;
 167 }
 168
 169 bool THepMCParser::IsValidVertexInvariantMass(bool useStdErr, bool includeStatusCode2Particles)
 170 {
 171    bool valid = true;
 172    TClonesArray * array = new TClonesArray("TParticle");
 173    TBranch* branch = fTree->GetBranch("Particles");
 174    branch->SetAddress(&array);
 175    Int_t count = branch->GetEntries();
 176    for (Int_t idx=0; idx<count; ++idx) {
 177       array->Clear();
 178       branch->GetEntry(idx); // "fill" the array
 179       TLorentzVector v_st1;
 180       TLorentzVector v_st4;
 181       Int_t nkeep = array->GetEntriesFast();
 182       for (Int_t i=0; i<nkeep; i++) {
 183          TParticle * parton = (TParticle*)array->AddrAt(i);
 184          TLorentzVector v_in;
 185          parton->Momentum(v_in);
 186          if (parton->GetStatusCode()==4) {
 187             v_st4 += v_in;
 188          } else if (parton->GetStatusCode()==1) {
 189             v_st1 += v_in;
 190          }
 191          if (!includeStatusCode2Particles) { // only check beam particles vs final particles
 192             continue;
 193          }
 194          Int_t fd = parton->GetFirstDaughter();
 195          Int_t ld = parton->GetLastDaughter();
 196          if (fd == -1) continue; // no daughters, continue loop
 197          Int_t mother2 = -1;
 198          TLorentzVector v_out;
 199          bool oneok = false; bool allok = true; bool agreemother2 = true;
 200          ostringstream daughterpdg;
 201          ostringstream motherpdg;
 202          for (Int_t id=TMath::Max(fd,0); id<=ld; id++) {
 203             TParticle * daughter = (TParticle*)array->AddrAt(id);
 204             if (fd==id) {
 205                daughter->Momentum(v_out);
 206                mother2 = daughter->GetSecondMother();
 207             } else {
 208                TLorentzVector d;
 209                daughter->Momentum(d);
 210                v_out += d;
 211                if (daughter->GetSecondMother() != mother2) agreemother2 = false;
 212             }
 213             if (daughter->GetFirstMother() == i) {
 214                oneok = true;
 215             } else {
 216                allok = false;
 217             }
 218             daughterpdg << " " << daughter->GetPdgCode();
 219          }
 220          motherpdg << " " << parton->GetPdgCode();
 221          if (mother2 > -1 && agreemother2) {
 222             TParticle * m2 = (TParticle*)array->AddrAt(mother2);
 223             TLorentzVector m2v;
 224             m2->Momentum(m2v);
 225             v_in += m2v;
 226             motherpdg << " " << m2->GetPdgCode();
 227          }
 228          if (oneok && allok && agreemother2) {
 229             bool checkok = abs(1 - v_in.M()/v_out.M()) < 0.1;
 230             if (!checkok) valid=false;
 231             if (!checkok && useStdErr) {
 232                //             cerr << "Problem: " << i << "[" << fd << "," << ld << "] PDG:" << motherpdg.str() << " ->" << daughterpdg.str() << "  Inv.mass: " << v_in.M() << " -> " << v_out.M() << endl;
 233                cerr << ListReactionChain(array,i);
 234                cerr << endl;
 235                //             cerr << v_in.Px() << " " << v_in.Py() << " " << v_in.Pz() << " " << v_in.E() << endl;
 236             } else if (useStdErr) {
 237                //             cerr << "OK: " << i << "[" << fd << "," << ld << "] PDG:" << motherpdg.str() << " ->" << daughterpdg.str() << "  Inv.mass: " << v_in.M() << " -> " << v_out.M() << endl;
 238             }
 239          }
 240       }
 241       bool checkok = abs(1 - v_st4.M()/v_st1.M()) < 0.001;
 242       if (!checkok) valid=false;
 243       if (!checkok && useStdErr) {
 244          cerr << " BEAM PARTICLES -> FINAL PARTICLES " << endl;
 245          cerr << " status 4 (" << v_st4.M() << ") -> status 1 (" << v_st1.M() << ")" << endl << endl;
 246       }
 247    }
 248    delete array;
 249    array = 0;
 250    return valid;
 251 }
 252
 253 string THepMCParser::GetParticleName(TParticle * thisPart)
 254 {
 255    TParticlePDG *dbPart = thisPart->GetPDG();
 256    ostringstream name;
 257    if (dbPart) {
 258       name << dbPart->GetName() << "(" << dbPart->PdgCode() << "," << dbPart->Mass() << ")";
 259    } else {
 260       name << thisPart->GetPdgCode() << "(NoDBinfo)";
 261    }
 262    return name.str();
 263 }
 264
 265 string THepMCParser::ListReactionChain(TClonesArray * particles, Int_t particleId)
 266 {
 267    ostringstream output;
 268
 269    TParticle * part = (TParticle*)particles->AddrAt(particleId);
 270    Int_t m1id = part->GetFirstMother();
 271    Int_t m2id = part->GetSecondMother();
 272    if (m1id > 1) { // ignore the initial collision with beam particles
 273       ostringstream inStr;
 274       ostringstream outStr;
 275       TParticle * m1 = (TParticle*)particles->AddrAt(m1id);
 276       TLorentzVector v_in;
 277       m1->Momentum(v_in);
 278       inStr << GetParticleName(m1) << "[" << v_in.M() << "]";
 279       if (m2id > 1) {
 280          TParticle * m2 = (TParticle*)particles->AddrAt(m2id);
 281          TLorentzVector v_m2;
 282          m2->Momentum(v_m2);
 283          v_in += v_m2;
 284          inStr << " " << GetParticleName(m2) << "[" << v_m2.M() << "]";
 285       }
 286       Int_t fd = m1->GetFirstDaughter();
 287       Int_t ld = m1->GetLastDaughter();
 288       TLorentzVector v_out;
 289       part->Momentum(v_out);
 290       outStr << GetParticleName(part) << "[" << v_out.M() << "]";
 291       for (Int_t i=fd; i<=ld; ++i) {
 292          if (i!=particleId) {
 293             TParticle * d = (TParticle*)particles->AddrAt(i);
 294             TLorentzVector v_d;
 295             d->Momentum(v_d);
 296             v_out += v_d;
 297             outStr << " " << GetParticleName(d) << "[" << v_d.M() << "]";
 298          }
 299       }
 300       output << "Parent reaction, inv mass: " << v_in.M() << " -> " << v_out.M() << endl;
 301       output << " - partons: " << inStr.str() << " -> " << outStr.str() << endl;
 302    }
 303    Int_t fd = part->GetFirstDaughter();
 304    Int_t ld = part->GetLastDaughter();
 305    if (fd > -1) {
 306       ostringstream inStr;
 307       ostringstream outStr;
 308       TLorentzVector v_in;
 309       part->Momentum(v_in);
 310       inStr << GetParticleName(part) << "[" << v_in.M() << "]";
 311
 312       TParticle * f = (TParticle*)particles->AddrAt(fd);
 313       m2id = f->GetSecondMother();
 314       if (m2id == particleId) {
 315          m2id = f->GetFirstMother();
 316       }
 317       if (m2id > -1) {
 318          TParticle * m2 = (TParticle*)particles->AddrAt(m2id);
 319          TLorentzVector v_m2;
 320          m2->Momentum(v_m2);
 321          v_in += v_m2;
 322          inStr << " " << GetParticleName(m2) << "[" << v_m2.M() << "]";
 323       }
 324       TLorentzVector v_out;
 325       f->Momentum(v_out);
 326       outStr << GetParticleName(f) << "[" << v_out.M() << "]";
 327       for (Int_t i=fd+1; i<=ld; ++i) {
 328          TParticle * d = (TParticle*)particles->AddrAt(i);
 329          TLorentzVector v_d;
 330          d->Momentum(v_d);
 331          v_out += v_d;
 332          outStr << " " << GetParticleName(d) << "[" << v_d.M() << "]";
 333       }
 334       output << "Child reaction, inv mass: " << v_in.M() << " -> " << v_out.M() << endl;
 335       output << " - partons: " << inStr.str() << " -> " << outStr.str() << endl;
 336    } else {
 337       output << "Child reaction" << endl << " - none" << endl;
 338    }
 339
 340    return output.str();
 341 }
 342
 343
 344 string THepMCParser::ParseGenEvent2TCloneArray(HepMC::GenEvent * genEvent, TClonesArray * array, bool requireSecondMotherBeforeDaughters)
 345 {
 346    if (requireSecondMotherBeforeDaughters) {
 347       return "requireSecondMotherBeforeDaughters not implemented yet!";
 348    }
 349    array->Clear();
 350    ostringstream errMsgStream;
 351    map<int,Int_t> partonMemory; // unordered_map in c++11 - but probably not much performance gain from that: log(n) vs log(1) where constant can be high
 352
 353    // Check event with HepMC's internal validation algorithm
 354    if (!genEvent->is_valid()) {
 355       errMsgStream << "Error with event id: " << genEvent->event_number() << ", event is not valid!";
 356       return errMsgStream.str();
 357    }
 358
 359    // Pull out the beam particles from the event
 360    const pair<HepMC::GenParticle *,HepMC::GenParticle *> beamparts = genEvent->beam_particles();
 361
 362    // Four sanity checks:
 363    // - Beam particles exists and are not the same
 364    // - Both beam particles should have no production vertices, they come from the beams
 365    // - Both beam particles should have defined end vertices, as they both should contribute
 366    // - Both beam particles should have the exact same end vertex
 367    if (!beamparts.first || !beamparts.second || beamparts.first->barcode()==beamparts.second->barcode()) {
 368       errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles doesn't exists or are the same";
 369       return errMsgStream.str();
 370    }
 371    if (beamparts.first->production_vertex() || beamparts.second->production_vertex()) {
 372       errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles have production vertex/vertices...";
 373       return errMsgStream.str();
 374    }
 375    if (!beamparts.first->end_vertex() || !beamparts.second->end_vertex()) {
 376       errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles have undefined end vertex/vertices...";
 377       return errMsgStream.str();
 378    }
 379    if (beamparts.first->end_vertex() != beamparts.second->end_vertex()) {
 380       errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles do not collide in the same end vertex.";
 381       return errMsgStream.str();
 382    }
 383
 384    // Set the array to hold the number of particles in the event
 385    array->Expand(genEvent->particles_size());
 386
 387    // Create a TParticle for each beam particle
 388    new((*array)[0]) TParticle(
 389          beamparts.first->pdg_id(),
 390          beamparts.first->status(), // check if status has the same meaning
 391          -1, // no mother1
 392          -1, // no mother2
 393          -1, // first daughter not known yet
 394          -1, // last daughter not known yet
 395          beamparts.first->momentum().px(),
 396          beamparts.first->momentum().py(),
 397          beamparts.first->momentum().pz(),
 398          beamparts.first->momentum().e(),
 399          0, // no production vertex, so zero?
 400          0,
 401          0,
 402          0
 403    );
 404    partonMemory[beamparts.first->barcode()] = 0;
 405    new((*array)[1]) TParticle(
 406          beamparts.second->pdg_id(),
 407          beamparts.second->status(),
 408          -1, // no mother1
 409          -1, // no mother2
 410          -1, // first daughter not known yet
 411          -1, // last daughter not known yet
 412          beamparts.second->momentum().px(),
 413          beamparts.second->momentum().py(),
 414          beamparts.second->momentum().pz(),
 415          beamparts.second->momentum().e(),
 416          0, // no production vertex, so zero?
 417          0,
 418          0,
 419          0
 420    );
 421    partonMemory[beamparts.second->barcode()] = 1;
 422    Int_t arrayID = 2; // start counting IDs after the beam particles
 423
 424    // Do first vertex as a special case for performance, since its often has the most daughters and both mothers are known
 425    Int_t firstDaughter = arrayID;
 426    for (HepMC::GenVertex::particles_out_const_iterator iter = beamparts.first->end_vertex()->particles_out_const_begin();
 427          iter != beamparts.first->end_vertex()->particles_out_const_end();
 428          ++iter) {
 429       new((*array)[arrayID]) TParticle(
 430             (*iter)->pdg_id(),
 431             (*iter)->status(),
 432             0, // beam particle 1
 433             1, // beam particle 2
 434             -1, // first daughter not known yet
 435             -1, // last daughter not known yet
 436             (*iter)->momentum().px(),
 437             (*iter)->momentum().py(),
 438             (*iter)->momentum().pz(),
 439             (*iter)->momentum().e(),
 440             beamparts.first->end_vertex()->position().x(),
 441             beamparts.first->end_vertex()->position().y(),
 442             beamparts.first->end_vertex()->position().z(),
 443             beamparts.first->end_vertex()->position().t()
 444       );
 445       partonMemory[(*iter)->barcode()] = arrayID;
 446       ++arrayID;
 447    }
 448    Int_t lastDaughter = arrayID-1;
 449    ((TParticle*)array->AddrAt(0))->SetFirstDaughter(firstDaughter); // beam particle 1
 450    ((TParticle*)array->AddrAt(0))->SetLastDaughter(lastDaughter);
 451    ((TParticle*)array->AddrAt(1))->SetFirstDaughter(firstDaughter); // beam particle 2
 452    ((TParticle*)array->AddrAt(1))->SetLastDaughter(lastDaughter);
 453
 454    // Build vertex list by exploring tree and sorting such that daughters comes after mothers
 455    list<HepMC::GenVertex*> vertexList;
 456    set<int> vertexSearchSet;
 457    ExploreVertex(beamparts.first->end_vertex(),vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
 458
 459    // Analyze each vertex
 460    for (list<HepMC::GenVertex*>::iterator i = vertexList.begin(); i != vertexList.end(); ++i) {
 461       HepMC::GenVertex * vertex = (*i);
 462
 463       // first establish mother relations
 464       HepMC::GenVertex::particles_in_const_iterator iter = vertex->particles_in_const_begin();
 465       if (iter == vertex->particles_in_const_end()) {
 466          return "Particle without a mother, and its not a beam particle!";
 467       }
 468       int motherA = partonMemory[(*iter)->barcode()];
 469       if (((TParticle*)array->AddrAt(motherA))->GetFirstDaughter() > -1) {
 470          return "Trying to assign new daughters to a particle that already has daughters defined!";
 471       }
 472       ++iter;
 473       int motherB = -1;
 474       if (iter != vertex->particles_in_const_end()) {
 475          motherB = partonMemory[(*iter)->barcode()];
 476          if (((TParticle*)array->AddrAt(motherB))->GetFirstDaughter() > -1) {
 477             return "Trying to assign new daughters to a particle that already has daughters defined!";
 478          }
 479          ++iter;
 480          if (iter != vertex->particles_in_const_end()) {
 481             return "Particle with more than two mothers!";
 482          }
 483       }
 484       if (motherB > -1 && motherB < motherA) {
 485          int swap = motherA; motherA = motherB; motherB = swap;
 486       }
 487
 488       // add the particles to the array, important that they are add in succession with respect to arrayID
 489       firstDaughter = arrayID;
 490       for (iter = vertex->particles_out_const_begin();
 491             iter != vertex->particles_out_const_end();
 492             ++iter) {
 493          new((*array)[arrayID]) TParticle(
 494                (*iter)->pdg_id(),
 495                (*iter)->status(),
 496                motherA, // mother 1
 497                motherB, // mother 2
 498                -1, // first daughter, if applicable, not known yet
 499                -1, // last daughter, if applicable, not known yet
 500                (*iter)->momentum().px(),
 501                (*iter)->momentum().py(),
 502                (*iter)->momentum().pz(),
 503                (*iter)->momentum().e(),
 504                vertex->position().x(),
 505                vertex->position().y(),
 506                vertex->position().z(),
 507                vertex->position().t()
 508          );
 509          partonMemory[(*iter)->barcode()] = arrayID;
 510          ++arrayID;
 511       }
 512       lastDaughter = arrayID-1;
 513       if (lastDaughter < firstDaughter) {
 514          return "Vertex with no out particles, should not be possible!";
 515       }
 516       // update mother with daughter interval
 517       ((TParticle*)array->AddrAt(motherA))->SetFirstDaughter(firstDaughter);
 518       ((TParticle*)array->AddrAt(motherA))->SetLastDaughter(lastDaughter);
 519       if (motherB > -1) {
 520          ((TParticle*)array->AddrAt(motherB))->SetFirstDaughter(firstDaughter);
 521          ((TParticle*)array->AddrAt(motherB))->SetLastDaughter(lastDaughter);
 522       }
 523    }
 524
 525    return "";
 526 }
 527
 528
 529 void THepMCParser::ExploreVertex(HepMC::GenVertex * vertex, list<HepMC::GenVertex*> & vertexList, set<int> & vertexSearchSet, bool requireSecondMotherBeforeDaughters)
 530 {
 531    for (HepMC::GenVertex::particles_out_const_iterator iter = vertex->particles_out_const_begin();
 532          iter != vertex->particles_out_const_end();
 533          ++iter) {
 534       HepMC::GenVertex * testVertex = (*iter)->end_vertex();
 535       if (testVertex) {
 536          bool foundVertex = vertexSearchSet.find((*iter)->end_vertex()->barcode()) != vertexSearchSet.end();
 537          if (requireSecondMotherBeforeDaughters) {
 538             // redo this algorithem to move subtree instead of node....
 539             // its not completely error proof in its current implementation even though the error is extremely rare
 540
 541             if (foundVertex) for (list<HepMC::GenVertex*>::iterator i = vertexList.begin(); i != vertexList.end(); ++i) {
 542                if ((*i)->barcode() == testVertex->barcode()) {
 543                   vertexList.erase(i);
 544                   cout << " it happened, the vertex parsing order had to be changed " << endl;
 545                   break;
 546                }
 547             } else {
 548                vertexSearchSet.insert((*iter)->end_vertex()->barcode());
 549             }
 550             vertexList.push_back(testVertex);
 551             if (!foundVertex) ExploreVertex(testVertex,vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
 552
 553          } else {
 554             if (!foundVertex) {
 555                vertexSearchSet.insert((*iter)->end_vertex()->barcode());
 556                vertexList.push_back(testVertex);
 557                ExploreVertex(testVertex,vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
 558             }
 559          }
 560       }
 561    }
 562 }
 563
 564
 565
 566 const char * THepMCParser::fgHeavyIonHeaderBranchString = "Ncoll_hard/I:Npart_proj:Npart_targ:Ncoll:spectator_neutrons:spectator_protons:N_Nwounded_collisions:Nwounded_N_collisions:Nwounded_Nwounded_collisions:impact_parameter/F:event_plane_angle:eccentricity:sigma_inel_NN";
 567 const char * THepMCParser::fgPdfHeaderBranchString = "id1/I:id2:pdf_id1:pdf_id2:x1/D:x2:scalePDF:pdf1:pdf2";
 568
 569 string THepMCParser::ParseGenEvent2HeaderStructs(HepMC::GenEvent * genEvent, HeavyIonHeader_t & heavyIonHeader, PdfHeader_t & pdfHeader, bool fillZeroOnMissingHeavyIon, bool fillZeroOnMissingPdf)
 570 {
 571    HepMC::HeavyIon * heavyIon = genEvent->heavy_ion();
 572    HepMC::PdfInfo * pdfInfo = genEvent->pdf_info();
 573    if ((!heavyIon && !fillZeroOnMissingHeavyIon) || (!pdfInfo && !fillZeroOnMissingPdf)) {
 574       return "HeavyIonInfo and/or PdfInfo not defined for this event, did you read it with IO_GenEvent?";
 575    }
 576    if (heavyIon) {
 577       heavyIonHeader.Ncoll_hard = heavyIon->Ncoll_hard();
 578       heavyIonHeader.Npart_proj = heavyIon->Npart_proj();
 579       heavyIonHeader.Npart_targ = heavyIon->Npart_targ();
 580       heavyIonHeader.Ncoll = heavyIon->Ncoll();
 581       heavyIonHeader.spectator_neutrons = heavyIon->spectator_neutrons();
 582       heavyIonHeader.spectator_protons = heavyIon->spectator_protons();
 583       heavyIonHeader.N_Nwounded_collisions = heavyIon->N_Nwounded_collisions();
 584       heavyIonHeader.Nwounded_N_collisions = heavyIon->Nwounded_N_collisions();
 585       heavyIonHeader.Nwounded_Nwounded_collisions = heavyIon->Nwounded_Nwounded_collisions();
 586       heavyIonHeader.impact_parameter = heavyIon->impact_parameter();
 587       heavyIonHeader.event_plane_angle = heavyIon->event_plane_angle();
 588       heavyIonHeader.eccentricity = heavyIon->eccentricity();
 589       heavyIonHeader.sigma_inel_NN = heavyIon->sigma_inel_NN();
 590    } else {
 591       heavyIonHeader.Ncoll_hard = 0;
 592       heavyIonHeader.Npart_proj = 0;
 593       heavyIonHeader.Npart_targ = 0;
 594       heavyIonHeader.Ncoll = 0;
 595       heavyIonHeader.spectator_neutrons = 0;
 596       heavyIonHeader.spectator_protons = 0;
 597       heavyIonHeader.N_Nwounded_collisions = 0;
 598       heavyIonHeader.Nwounded_N_collisions = 0;
 599       heavyIonHeader.Nwounded_Nwounded_collisions = 0;
 600       heavyIonHeader.impact_parameter = 0.0;
 601       heavyIonHeader.event_plane_angle = 0.0;
 602       heavyIonHeader.eccentricity = 0.0;
 603       heavyIonHeader.sigma_inel_NN = 0.0;
 604    }
 605    if (pdfInfo) {
 606       pdfHeader.id1 = pdfInfo->id1();
 607       pdfHeader.id2 = pdfInfo->id2();
 608       pdfHeader.pdf_id1 = pdfInfo->pdf_id1();
 609       pdfHeader.pdf_id2 = pdfInfo->pdf_id2();
 610       pdfHeader.x1 = pdfInfo->x1();
 611       pdfHeader.x2 = pdfInfo->x2();
 612       pdfHeader.scalePDF = pdfInfo->scalePDF();
 613       pdfHeader.pdf1 = pdfInfo->pdf1();
 614       pdfHeader.pdf2 = pdfInfo->pdf2();
 615    } else {
 616       pdfHeader.id1 = 0;
 617       pdfHeader.id2 = 0;
 618       pdfHeader.pdf_id1 = 0;
 619       pdfHeader.pdf_id2 = 0;
 620       pdfHeader.x1 = 0.0;
 621       pdfHeader.x2 = 0.0;
 622       pdfHeader.scalePDF = 0.0;
 623       pdfHeader.pdf1 = 0.0;
 624       pdfHeader.pdf2 = 0.0;
 625    }
 626    return "";
 627 }
 628
 629
 630
 631
 632
 633
 634