--- /dev/null
+// module identifier line...
+// Author: Brian Thorsbro, 24/6-2014
+
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <list>
+#include <set>
+#include <time.h>
+
+#include "THepMCParser.h"
+#include "HepMC/IO_GenEvent.h"
+#include "TObject.h"
+#include "TTree.h"
+#include "TClonesArray.h"
+#include "TFile.h"
+#include "TParticle.h"
+#include "TDatabasePDG.h"
+
+using namespace std;
+
+
+THepMCParser::THepMCParser(const char * infile) : fTree(0)
+{
+ HepMC::IO_BaseClass * events = new HepMC::IO_GenEvent(infile, std::ios::in);
+ init(events);
+ delete events;
+ events = 0; // nullptr
+}
+THepMCParser::THepMCParser(HepMC::IO_BaseClass * events) : fTree(0)
+{
+ init(events);
+}
+void THepMCParser::init(HepMC::IO_BaseClass * events)
+{
+ int particlecount = 0;
+ fTree = new TTree("treeEPOS","Tree EPOS");
+ TClonesArray * array = new TClonesArray("TParticle");
+ // array->BypassStreamer();
+ fTree->Branch("Particles",&array); // more flags?
+ THepMCParser::HeavyIonHeader_t heavyIonHeader;
+ fTree->Branch("HeavyIonInfo", &heavyIonHeader, THepMCParser::fgHeavyIonHeaderBranchString);
+ THepMCParser::PdfHeader_t pdfHeader;
+ fTree->Branch("PdfInfo", &pdfHeader, THepMCParser::fgPdfHeaderBranchString);
+ HepMC::GenEvent* evt = 0; // nullptr
+ while ((evt = events->read_next_event())) {
+ string errMsg1 = ParseGenEvent2TCloneArray(evt,array);
+ string errMsg2 = ParseGenEvent2HeaderStructs(evt,heavyIonHeader,pdfHeader);
+ if (errMsg1.length() == 0 && errMsg2.length() == 0) {
+ fTree->Fill();
+ } else {
+ if (errMsg1.length() != 0) cerr << errMsg1 << endl;
+ if (errMsg2.length() != 0) cerr << errMsg2 << endl;
+ }
+ particlecount += array->Capacity();
+ }
+// array->Clear();
+// delete array;
+// array = 0; // nullptr
+ cout << " parsed " << particlecount << " particles" << endl;
+}
+
+
+TTree * THepMCParser::GetTTree()
+{
+ return fTree;
+}
+void THepMCParser::WriteTTreeToFile(const char *outfile)
+{
+ TFile * f = new TFile(outfile, "recreate");
+ fTree->Write();
+ delete f;
+ f = 0; // nullptr
+}
+
+
+
+// Based on a validator written by Peter Hristov, CERN
+bool THepMCParser::IsValidMotherDaughtersConsitency(bool useStdErr, bool requireSecondMotherBeforeDaughters)
+{
+ bool valid = true;
+ TClonesArray * array = new TClonesArray("TParticle");
+ TBranch* branch = fTree->GetBranch("Particles");
+ branch->SetAddress(&array);
+ Int_t count = branch->GetEntries();
+ for (Int_t idx=0; idx<count; ++idx) {
+ array->Clear();
+ branch->GetEntry(idx); // "fill" the array
+ Int_t nkeep = array->GetEntriesFast();
+ for (Int_t i=0; i<nkeep; i++) {
+ TParticle * part = (TParticle*)array->AddrAt(i);
+ Int_t mum1 = part->GetFirstMother();
+ Int_t mum2 = part->GetSecondMother();
+ Int_t fd = part->GetFirstDaughter();
+ Int_t ld = part->GetLastDaughter();
+ if (mum1>-1 && i<mum1) {
+ valid = false;
+ if (useStdErr) cerr << "Problem: first_mother(" << mum1 << ") after daughter(" << i << ")" << endl;
+ }
+ if (mum2>-1 && i<mum2 && requireSecondMotherBeforeDaughters) {
+ valid = false;
+ if (useStdErr) cerr << "Problem: second_mother(" << mum2 << ") after daughter(" << i << ")" << endl;
+ }
+ if (fd > ld ) {
+ valid = false;
+ if (useStdErr) cerr << "Problem: first_daughter(" << fd << ") > last_daughter(" << ld << ")" << endl;
+ }
+ for (Int_t id=TMath::Max(fd,0); id<=ld; id++) {
+ TParticle * daughter = (TParticle*)array->AddrAt(id);
+ if (daughter->GetFirstMother() != i && daughter->GetSecondMother() != i) {
+ valid = false;
+ if (useStdErr) cerr << "Problem: mother("<< i << ") not registered as mother for either first_daughter("
+ << daughter->GetFirstMother() << ") or second_daughter("
+ << daughter->GetSecondMother() << ")" << endl;
+ }
+ }
+ }
+ }
+ delete array;
+ array = 0;
+ return valid;
+}
+
+bool THepMCParser::IsValidParticleInvariantMass(bool useStdErr, bool includeStatusCode2Particles)
+{
+ bool valid = true;
+ TClonesArray *array = new TClonesArray("TParticle");
+ TBranch* branch = fTree->GetBranch("Particles");
+ branch->SetAddress(&array);
+ Int_t count = branch->GetEntries();
+ for (Int_t idx=0; idx<count; ++idx) {
+ array->Clear();
+ branch->GetEntry(idx);
+ Int_t nkeep = array->GetEntries();
+ for (Int_t i=0; i<nkeep; i++) {
+ TParticle * parton = (TParticle*)array->AddrAt(i);
+ if (parton->GetStatusCode()==2 && !includeStatusCode2Particles) {
+ continue;
+ }
+ TLorentzVector v;
+ parton->Momentum(v);
+ Double_t m1 = v.M(); // invariant mass from the particle in the HepMC event
+ TParticlePDG *dbParton = parton->GetPDG();
+ if (!dbParton) {
+ if (useStdErr) cerr << "Warning: could not look up particle with PDG Code: " << parton->GetPdgCode() << endl << endl;
+ continue;
+ }
+ Double_t m2 = dbParton->Mass();
+ bool checkok;
+ if (m2 == 0) {
+ checkok = abs(m1) < 0.0001; // no such thing as negative mass...
+ } else {
+ checkok = abs(1 - m1/m2) < 0.01;
+ }
+ if (!checkok && useStdErr) {
+ cerr << "Problem: " << GetParticleName(parton) << " HepMC:" << m1 << endl;
+ cerr << ListReactionChain(array,i);
+ cerr << endl;
+ }
+ if (!checkok)
+ valid = false;
+ }
+ }
+ delete array;
+ array = 0;
+ return valid;
+}
+
+bool THepMCParser::IsValidVertexInvariantMass(bool useStdErr, bool includeStatusCode2Particles)
+{
+ bool valid = true;
+ TClonesArray * array = new TClonesArray("TParticle");
+ TBranch* branch = fTree->GetBranch("Particles");
+ branch->SetAddress(&array);
+ Int_t count = branch->GetEntries();
+ for (Int_t idx=0; idx<count; ++idx) {
+ array->Clear();
+ branch->GetEntry(idx); // "fill" the array
+ TLorentzVector v_st1;
+ TLorentzVector v_st4;
+ Int_t nkeep = array->GetEntriesFast();
+ for (Int_t i=0; i<nkeep; i++) {
+ TParticle * parton = (TParticle*)array->AddrAt(i);
+ TLorentzVector v_in;
+ parton->Momentum(v_in);
+ if (parton->GetStatusCode()==4) {
+ v_st4 += v_in;
+ } else if (parton->GetStatusCode()==1) {
+ v_st1 += v_in;
+ }
+ if (!includeStatusCode2Particles) { // only check beam particles vs final particles
+ continue;
+ }
+ Int_t fd = parton->GetFirstDaughter();
+ Int_t ld = parton->GetLastDaughter();
+ if (fd == -1) continue; // no daughters, continue loop
+ Int_t mother2 = -1;
+ TLorentzVector v_out;
+ bool oneok = false; bool allok = true; bool agreemother2 = true;
+ ostringstream daughterpdg;
+ ostringstream motherpdg;
+ for (Int_t id=TMath::Max(fd,0); id<=ld; id++) {
+ TParticle * daughter = (TParticle*)array->AddrAt(id);
+ if (fd==id) {
+ daughter->Momentum(v_out);
+ mother2 = daughter->GetSecondMother();
+ } else {
+ TLorentzVector d;
+ daughter->Momentum(d);
+ v_out += d;
+ if (daughter->GetSecondMother() != mother2) agreemother2 = false;
+ }
+ if (daughter->GetFirstMother() == i) {
+ oneok = true;
+ } else {
+ allok = false;
+ }
+ daughterpdg << " " << daughter->GetPdgCode();
+ }
+ motherpdg << " " << parton->GetPdgCode();
+ if (mother2 > -1 && agreemother2) {
+ TParticle * m2 = (TParticle*)array->AddrAt(mother2);
+ TLorentzVector m2v;
+ m2->Momentum(m2v);
+ v_in += m2v;
+ motherpdg << " " << m2->GetPdgCode();
+ }
+ if (oneok && allok && agreemother2) {
+ bool checkok = abs(1 - v_in.M()/v_out.M()) < 0.1;
+ if (!checkok) valid=false;
+ if (!checkok && useStdErr) {
+ // cerr << "Problem: " << i << "[" << fd << "," << ld << "] PDG:" << motherpdg.str() << " ->" << daughterpdg.str() << " Inv.mass: " << v_in.M() << " -> " << v_out.M() << endl;
+ cerr << ListReactionChain(array,i);
+ cerr << endl;
+ // cerr << v_in.Px() << " " << v_in.Py() << " " << v_in.Pz() << " " << v_in.E() << endl;
+ } else if (useStdErr) {
+ // cerr << "OK: " << i << "[" << fd << "," << ld << "] PDG:" << motherpdg.str() << " ->" << daughterpdg.str() << " Inv.mass: " << v_in.M() << " -> " << v_out.M() << endl;
+ }
+ }
+ }
+ bool checkok = abs(1 - v_st4.M()/v_st1.M()) < 0.001;
+ if (!checkok) valid=false;
+ if (!checkok && useStdErr) {
+ cerr << " BEAM PARTICLES -> FINAL PARTICLES " << endl;
+ cerr << " status 4 (" << v_st4.M() << ") -> status 1 (" << v_st1.M() << ")" << endl << endl;
+ }
+ }
+ delete array;
+ array = 0;
+ return valid;
+}
+
+string THepMCParser::GetParticleName(TParticle * thisPart)
+{
+ TParticlePDG *dbPart = thisPart->GetPDG();
+ ostringstream name;
+ if (dbPart) {
+ name << dbPart->GetName() << "(" << dbPart->PdgCode() << "," << dbPart->Mass() << ")";
+ } else {
+ name << thisPart->GetPdgCode() << "(NoDBinfo)";
+ }
+ return name.str();
+}
+
+string THepMCParser::ListReactionChain(TClonesArray * particles, Int_t particleId)
+{
+ ostringstream output;
+
+ TParticle * part = (TParticle*)particles->AddrAt(particleId);
+ Int_t m1id = part->GetFirstMother();
+ Int_t m2id = part->GetSecondMother();
+ if (m1id > 1) { // ignore the initial collision with beam particles
+ ostringstream inStr;
+ ostringstream outStr;
+ TParticle * m1 = (TParticle*)particles->AddrAt(m1id);
+ TLorentzVector v_in;
+ m1->Momentum(v_in);
+ inStr << GetParticleName(m1) << "[" << v_in.M() << "]";
+ if (m2id > 1) {
+ TParticle * m2 = (TParticle*)particles->AddrAt(m2id);
+ TLorentzVector v_m2;
+ m2->Momentum(v_m2);
+ v_in += v_m2;
+ inStr << " " << GetParticleName(m2) << "[" << v_m2.M() << "]";
+ }
+ Int_t fd = m1->GetFirstDaughter();
+ Int_t ld = m1->GetLastDaughter();
+ TLorentzVector v_out;
+ part->Momentum(v_out);
+ outStr << GetParticleName(part) << "[" << v_out.M() << "]";
+ for (Int_t i=fd; i<=ld; ++i) {
+ if (i!=particleId) {
+ TParticle * d = (TParticle*)particles->AddrAt(i);
+ TLorentzVector v_d;
+ d->Momentum(v_d);
+ v_out += v_d;
+ outStr << " " << GetParticleName(d) << "[" << v_d.M() << "]";
+ }
+ }
+ output << "Parent reaction, inv mass: " << v_in.M() << " -> " << v_out.M() << endl;
+ output << " - partons: " << inStr.str() << " -> " << outStr.str() << endl;
+ }
+ Int_t fd = part->GetFirstDaughter();
+ Int_t ld = part->GetLastDaughter();
+ if (fd > -1) {
+ ostringstream inStr;
+ ostringstream outStr;
+ TLorentzVector v_in;
+ part->Momentum(v_in);
+ inStr << GetParticleName(part) << "[" << v_in.M() << "]";
+
+ TParticle * f = (TParticle*)particles->AddrAt(fd);
+ m2id = f->GetSecondMother();
+ if (m2id == particleId) {
+ m2id = f->GetFirstMother();
+ }
+ if (m2id > -1) {
+ TParticle * m2 = (TParticle*)particles->AddrAt(m2id);
+ TLorentzVector v_m2;
+ m2->Momentum(v_m2);
+ v_in += v_m2;
+ inStr << " " << GetParticleName(m2) << "[" << v_m2.M() << "]";
+ }
+ TLorentzVector v_out;
+ f->Momentum(v_out);
+ outStr << GetParticleName(f) << "[" << v_out.M() << "]";
+ for (Int_t i=fd+1; i<=ld; ++i) {
+ TParticle * d = (TParticle*)particles->AddrAt(i);
+ TLorentzVector v_d;
+ d->Momentum(v_d);
+ v_out += v_d;
+ outStr << " " << GetParticleName(d) << "[" << v_d.M() << "]";
+ }
+ output << "Child reaction, inv mass: " << v_in.M() << " -> " << v_out.M() << endl;
+ output << " - partons: " << inStr.str() << " -> " << outStr.str() << endl;
+ } else {
+ output << "Child reaction" << endl << " - none" << endl;
+ }
+
+ return output.str();
+}
+
+
+string THepMCParser::ParseGenEvent2TCloneArray(HepMC::GenEvent * genEvent, TClonesArray * array, bool requireSecondMotherBeforeDaughters)
+{
+ if (requireSecondMotherBeforeDaughters) {
+ return "requireSecondMotherBeforeDaughters not implemented yet!";
+ }
+ array->Clear();
+ ostringstream errMsgStream;
+ 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
+
+ // Check event with HepMC's internal validation algorithm
+ if (!genEvent->is_valid()) {
+ errMsgStream << "Error with event id: " << genEvent->event_number() << ", event is not valid!";
+ return errMsgStream.str();
+ }
+
+ // Pull out the beam particles from the event
+ const pair<HepMC::GenParticle *,HepMC::GenParticle *> beamparts = genEvent->beam_particles();
+
+ // Four sanity checks:
+ // - Beam particles exists and are not the same
+ // - Both beam particles should have no production vertices, they come from the beams
+ // - Both beam particles should have defined end vertices, as they both should contribute
+ // - Both beam particles should have the exact same end vertex
+ if (!beamparts.first || !beamparts.second || beamparts.first->barcode()==beamparts.second->barcode()) {
+ errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles doesn't exists or are the same";
+ return errMsgStream.str();
+ }
+ if (beamparts.first->production_vertex() || beamparts.second->production_vertex()) {
+ errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles have production vertex/vertices...";
+ return errMsgStream.str();
+ }
+ if (!beamparts.first->end_vertex() || !beamparts.second->end_vertex()) {
+ errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles have undefined end vertex/vertices...";
+ return errMsgStream.str();
+ }
+ if (beamparts.first->end_vertex() != beamparts.second->end_vertex()) {
+ errMsgStream << "Error with event id: " << genEvent->event_number() << ", beam particles do not collide in the same end vertex.";
+ return errMsgStream.str();
+ }
+
+ // Set the array to hold the number of particles in the event
+ array->Expand(genEvent->particles_size());
+
+ // Create a TParticle for each beam particle
+ new((*array)[0]) TParticle(
+ beamparts.first->pdg_id(),
+ beamparts.first->status(), // check if status has the same meaning
+ -1, // no mother1
+ -1, // no mother2
+ -1, // first daughter not known yet
+ -1, // last daughter not known yet
+ beamparts.first->momentum().px(),
+ beamparts.first->momentum().py(),
+ beamparts.first->momentum().pz(),
+ beamparts.first->momentum().e(),
+ 0, // no production vertex, so zero?
+ 0,
+ 0,
+ 0
+ );
+ partonMemory[beamparts.first->barcode()] = 0;
+ new((*array)[1]) TParticle(
+ beamparts.second->pdg_id(),
+ beamparts.second->status(),
+ -1, // no mother1
+ -1, // no mother2
+ -1, // first daughter not known yet
+ -1, // last daughter not known yet
+ beamparts.second->momentum().px(),
+ beamparts.second->momentum().py(),
+ beamparts.second->momentum().pz(),
+ beamparts.second->momentum().e(),
+ 0, // no production vertex, so zero?
+ 0,
+ 0,
+ 0
+ );
+ partonMemory[beamparts.second->barcode()] = 1;
+ Int_t arrayID = 2; // start counting IDs after the beam particles
+
+ // Do first vertex as a special case for performance, since its often has the most daughters and both mothers are known
+ Int_t firstDaughter = arrayID;
+ for (HepMC::GenVertex::particles_out_const_iterator iter = beamparts.first->end_vertex()->particles_out_const_begin();
+ iter != beamparts.first->end_vertex()->particles_out_const_end();
+ ++iter) {
+ new((*array)[arrayID]) TParticle(
+ (*iter)->pdg_id(),
+ (*iter)->status(),
+ 0, // beam particle 1
+ 1, // beam particle 2
+ -1, // first daughter not known yet
+ -1, // last daughter not known yet
+ (*iter)->momentum().px(),
+ (*iter)->momentum().py(),
+ (*iter)->momentum().pz(),
+ (*iter)->momentum().e(),
+ beamparts.first->end_vertex()->position().x(),
+ beamparts.first->end_vertex()->position().y(),
+ beamparts.first->end_vertex()->position().z(),
+ beamparts.first->end_vertex()->position().t()
+ );
+ partonMemory[(*iter)->barcode()] = arrayID;
+ ++arrayID;
+ }
+ Int_t lastDaughter = arrayID-1;
+ ((TParticle*)array->AddrAt(0))->SetFirstDaughter(firstDaughter); // beam particle 1
+ ((TParticle*)array->AddrAt(0))->SetLastDaughter(lastDaughter);
+ ((TParticle*)array->AddrAt(1))->SetFirstDaughter(firstDaughter); // beam particle 2
+ ((TParticle*)array->AddrAt(1))->SetLastDaughter(lastDaughter);
+
+ // Build vertex list by exploring tree and sorting such that daughters comes after mothers
+ list<HepMC::GenVertex*> vertexList;
+ set<int> vertexSearchSet;
+ ExploreVertex(beamparts.first->end_vertex(),vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
+
+ // Analyze each vertex
+ for (list<HepMC::GenVertex*>::iterator i = vertexList.begin(); i != vertexList.end(); ++i) {
+ HepMC::GenVertex * vertex = (*i);
+
+ // first establish mother relations
+ HepMC::GenVertex::particles_in_const_iterator iter = vertex->particles_in_const_begin();
+ if (iter == vertex->particles_in_const_end()) {
+ return "Particle without a mother, and its not a beam particle!";
+ }
+ int motherA = partonMemory[(*iter)->barcode()];
+ if (((TParticle*)array->AddrAt(motherA))->GetFirstDaughter() > -1) {
+ return "Trying to assign new daughters to a particle that already has daughters defined!";
+ }
+ ++iter;
+ int motherB = -1;
+ if (iter != vertex->particles_in_const_end()) {
+ motherB = partonMemory[(*iter)->barcode()];
+ if (((TParticle*)array->AddrAt(motherB))->GetFirstDaughter() > -1) {
+ return "Trying to assign new daughters to a particle that already has daughters defined!";
+ }
+ ++iter;
+ if (iter != vertex->particles_in_const_end()) {
+ return "Particle with more than two mothers!";
+ }
+ }
+ if (motherB > -1 && motherB < motherA) {
+ int swap = motherA; motherA = motherB; motherB = swap;
+ }
+
+ // add the particles to the array, important that they are add in succession with respect to arrayID
+ firstDaughter = arrayID;
+ for (iter = vertex->particles_out_const_begin();
+ iter != vertex->particles_out_const_end();
+ ++iter) {
+ new((*array)[arrayID]) TParticle(
+ (*iter)->pdg_id(),
+ (*iter)->status(),
+ motherA, // mother 1
+ motherB, // mother 2
+ -1, // first daughter, if applicable, not known yet
+ -1, // last daughter, if applicable, not known yet
+ (*iter)->momentum().px(),
+ (*iter)->momentum().py(),
+ (*iter)->momentum().pz(),
+ (*iter)->momentum().e(),
+ vertex->position().x(),
+ vertex->position().y(),
+ vertex->position().z(),
+ vertex->position().t()
+ );
+ partonMemory[(*iter)->barcode()] = arrayID;
+ ++arrayID;
+ }
+ lastDaughter = arrayID-1;
+ if (lastDaughter < firstDaughter) {
+ return "Vertex with no out particles, should not be possible!";
+ }
+ // update mother with daughter interval
+ ((TParticle*)array->AddrAt(motherA))->SetFirstDaughter(firstDaughter);
+ ((TParticle*)array->AddrAt(motherA))->SetLastDaughter(lastDaughter);
+ if (motherB > -1) {
+ ((TParticle*)array->AddrAt(motherB))->SetFirstDaughter(firstDaughter);
+ ((TParticle*)array->AddrAt(motherB))->SetLastDaughter(lastDaughter);
+ }
+ }
+
+ return "";
+}
+
+
+void THepMCParser::ExploreVertex(HepMC::GenVertex * vertex, list<HepMC::GenVertex*> & vertexList, set<int> & vertexSearchSet, bool requireSecondMotherBeforeDaughters)
+{
+ for (HepMC::GenVertex::particles_out_const_iterator iter = vertex->particles_out_const_begin();
+ iter != vertex->particles_out_const_end();
+ ++iter) {
+ HepMC::GenVertex * testVertex = (*iter)->end_vertex();
+ if (testVertex) {
+ bool foundVertex = vertexSearchSet.find((*iter)->end_vertex()->barcode()) != vertexSearchSet.end();
+ if (requireSecondMotherBeforeDaughters) {
+ // redo this algorithem to move subtree instead of node....
+ // its not completely error proof in its current implementation even though the error is extremely rare
+
+ if (foundVertex) for (list<HepMC::GenVertex*>::iterator i = vertexList.begin(); i != vertexList.end(); ++i) {
+ if ((*i)->barcode() == testVertex->barcode()) {
+ vertexList.erase(i);
+ cout << " it happened, the vertex parsing order had to be changed " << endl;
+ break;
+ }
+ } else {
+ vertexSearchSet.insert((*iter)->end_vertex()->barcode());
+ }
+ vertexList.push_back(testVertex);
+ if (!foundVertex) ExploreVertex(testVertex,vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
+
+ } else {
+ if (!foundVertex) {
+ vertexSearchSet.insert((*iter)->end_vertex()->barcode());
+ vertexList.push_back(testVertex);
+ ExploreVertex(testVertex,vertexList,vertexSearchSet,requireSecondMotherBeforeDaughters);
+ }
+ }
+ }
+ }
+}
+
+
+
+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";
+const char * THepMCParser::fgPdfHeaderBranchString = "id1/I:id2:pdf_id1:pdf_id2:x1/D:x2:scalePDF:pdf1:pdf2";
+
+string THepMCParser::ParseGenEvent2HeaderStructs(HepMC::GenEvent * genEvent, HeavyIonHeader_t & heavyIonHeader, PdfHeader_t & pdfHeader, bool fillZeroOnMissingHeavyIon, bool fillZeroOnMissingPdf)
+{
+ HepMC::HeavyIon * heavyIon = genEvent->heavy_ion();
+ HepMC::PdfInfo * pdfInfo = genEvent->pdf_info();
+ if ((!heavyIon && !fillZeroOnMissingHeavyIon) || (!pdfInfo && !fillZeroOnMissingPdf)) {
+ return "HeavyIonInfo and/or PdfInfo not defined for this event, did you read it with IO_GenEvent?";
+ }
+ if (heavyIon) {
+ heavyIonHeader.Ncoll_hard = heavyIon->Ncoll_hard();
+ heavyIonHeader.Npart_proj = heavyIon->Npart_proj();
+ heavyIonHeader.Npart_targ = heavyIon->Npart_targ();
+ heavyIonHeader.Ncoll = heavyIon->Ncoll();
+ heavyIonHeader.spectator_neutrons = heavyIon->spectator_neutrons();
+ heavyIonHeader.spectator_protons = heavyIon->spectator_protons();
+ heavyIonHeader.N_Nwounded_collisions = heavyIon->N_Nwounded_collisions();
+ heavyIonHeader.Nwounded_N_collisions = heavyIon->Nwounded_N_collisions();
+ heavyIonHeader.Nwounded_Nwounded_collisions = heavyIon->Nwounded_Nwounded_collisions();
+ heavyIonHeader.impact_parameter = heavyIon->impact_parameter();
+ heavyIonHeader.event_plane_angle = heavyIon->event_plane_angle();
+ heavyIonHeader.eccentricity = heavyIon->eccentricity();
+ heavyIonHeader.sigma_inel_NN = heavyIon->sigma_inel_NN();
+ } else {
+ heavyIonHeader.Ncoll_hard = 0;
+ heavyIonHeader.Npart_proj = 0;
+ heavyIonHeader.Npart_targ = 0;
+ heavyIonHeader.Ncoll = 0;
+ heavyIonHeader.spectator_neutrons = 0;
+ heavyIonHeader.spectator_protons = 0;
+ heavyIonHeader.N_Nwounded_collisions = 0;
+ heavyIonHeader.Nwounded_N_collisions = 0;
+ heavyIonHeader.Nwounded_Nwounded_collisions = 0;
+ heavyIonHeader.impact_parameter = 0.0;
+ heavyIonHeader.event_plane_angle = 0.0;
+ heavyIonHeader.eccentricity = 0.0;
+ heavyIonHeader.sigma_inel_NN = 0.0;
+ }
+ if (pdfInfo) {
+ pdfHeader.id1 = pdfInfo->id1();
+ pdfHeader.id2 = pdfInfo->id2();
+ pdfHeader.pdf_id1 = pdfInfo->pdf_id1();
+ pdfHeader.pdf_id2 = pdfInfo->pdf_id2();
+ pdfHeader.x1 = pdfInfo->x1();
+ pdfHeader.x2 = pdfInfo->x2();
+ pdfHeader.scalePDF = pdfInfo->scalePDF();
+ pdfHeader.pdf1 = pdfInfo->pdf1();
+ pdfHeader.pdf2 = pdfInfo->pdf2();
+ } else {
+ pdfHeader.id1 = 0;
+ pdfHeader.id2 = 0;
+ pdfHeader.pdf_id1 = 0;
+ pdfHeader.pdf_id2 = 0;
+ pdfHeader.x1 = 0.0;
+ pdfHeader.x2 = 0.0;
+ pdfHeader.scalePDF = 0.0;
+ pdfHeader.pdf1 = 0.0;
+ pdfHeader.pdf2 = 0.0;
+ }
+ return "";
+}
+
+
+
+
+
+
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff