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loizides |
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// $Id:$
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#include "MitProd/TreeFiller/interface/FillGenParts.h"
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#include "FWCore/MessageLogger/interface/MessageLogger.h"
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#include "FWCore/Framework/interface/ESHandle.h"
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#include "DataFormats/Common/interface/Handle.h"
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#include "FWCore/ServiceRegistry/interface/Service.h"
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#include "SimDataFormats/HepMCProduct/interface/HepMCProduct.h"
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#include "MitAna/DataTree/interface/Particle.h"
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#include "TLorentzVector.h"
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using namespace std;
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using namespace edm;
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using namespace mithep;
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//-------------------------------------------------------------------------------------------------
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FillGenParts::FillGenParts(const edm::ParameterSet &iConfig)
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: anaMCSource_(iConfig.getUntrackedParameter<string>("anaMCSource" , "source"))
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{
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genParticles_ = new mithep::Vector<mithep::Particle>();
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}
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//-------------------------------------------------------------------------------------------------
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FillGenParts::~FillGenParts()
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{
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cout << " Fillgenpars done " <<endl;
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}
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//-------------------------------------------------------------------------------------------------
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void FillGenParts::analyze(const edm::Event &theEvent,
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const edm::EventSetup &iSetup)
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{
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genParticles_->Reset();
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Handle<HepMCProduct> theMCProduct;
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try {
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theEvent.getByLabel(anaMCSource_, theMCProduct);
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} catch (cms::Exception& ex) {
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printf("Error! can't get collection with label %s\n",anaMCSource_.c_str());
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}
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const HepMC::GenEvent GenEvent = theMCProduct->getHepMCData();
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int nGen = 0;
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for (HepMC::GenEvent::particle_const_iterator pgen =
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GenEvent.particles_begin();
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pgen != GenEvent.particles_end(); ++pgen) {
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HepMC::GenParticle* mcPart = (*pgen);
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if(!mcPart) continue;
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mithep::Particle genParticle;
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genParticle.SetPxPyPzE(mcPart->momentum().x(),mcPart->momentum().y(),
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mcPart->momentum().z(),mcPart->momentum().e());
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//printf("ngen %d\n",nGen);
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#if 0
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genParticle.setPdgID(MCPart->pdg_id());
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genParticle.setBarCode(MCPart->barcode()-1);
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genParticle.setStatus(MCPart->status());
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HepMC::GenVertex * momVert = MCPart->production_vertex();
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//genParticle.setMother(-1);
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if(momVert) {
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if(momVert->particles_in_size() == 1) {
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HepMC::GenVertex::particles_in_const_iterator mom = momVert->particles_in_const_begin();
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genParticle.setMother((*mom)->barcode() - 1);
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} else {genParticle.setMother(-1);}
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} else {genParticle.setMother(-1);}
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//if(MCPart->mother()) genParticle.setMother(MCPart->mother()->barcode()-1);
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//else genParticle.setMother(-1);
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genParticle.setPtr(nGen);
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#endif
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genParticles_->Add(genParticle);
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nGen++;
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}
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//genParticles_->resize(nGen);
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}
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//-------------------------------------------------------------------------------------------------
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void FillGenParts::beginJob(edm::EventSetup const &iEvent)
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{
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Service<TreeService> ts;
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TreeWriter *tws = ts->get();
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if(!tws) {
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//todo error
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return;
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}
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tws->AddBranch("Particles","mithep::Vector<mithep::Particle>",&genParticles_,32000,99);
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}
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//-------------------------------------------------------------------------------------------------
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void FillGenParts::endJob()
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{
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edm::LogInfo("FillGenParts::endJob") << "Ending Job" << endl;
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}
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