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// $Id: FillerMCVertexes.cc,v 1.17 2009/07/20 03:19:24 loizides Exp $
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#include "MitProd/TreeFiller/interface/FillerMCVertexes.h"
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#include "MitAna/DataTree/interface/Names.h"
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#include "MitAna/DataTree/interface/VertexCol.h"
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#include "MitProd/ObjectService/interface/ObjectService.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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FillerMCVertexes::FillerMCVertexes(const ParameterSet &cfg, const char *name, bool active) :
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BaseFiller(cfg, name, active),
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useAodGen_(Conf().getUntrackedParameter<bool>("useAodGen",true)),
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edmName_(Conf().getUntrackedParameter<string>("edmName","genParticles")),
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mitName_(Conf().getUntrackedParameter<string>("mitName","MCVertexes")),
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vertexes_(new mithep::VertexArr(1))
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{
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// Constructor.
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}
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//--------------------------------------------------------------------------------------------------
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FillerMCVertexes::~FillerMCVertexes()
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{
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// Destructor.
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delete vertexes_;
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}
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//--------------------------------------------------------------------------------------------------
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void FillerMCVertexes::BookDataBlock(TreeWriter &tws, const edm::EventSetup &es)
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{
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// Add branch to tree.
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tws.AddBranch(mitName_,&vertexes_);
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OS()->add<VertexArr>(vertexes_,mitName_);
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}
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//--------------------------------------------------------------------------------------------------
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void FillerMCVertexes::FillDataBlock(const edm::Event &event,
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const edm::EventSetup &setup)
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{
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// Loop over generated or simulated particles and fill their information.
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vertexes_->Delete();
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Double_t vtx=0, vty=0, vtz=0;
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if (!useAodGen_) {
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Handle<edm::HepMCProduct> hHepMCProduct;
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GetProduct(edmName_, hHepMCProduct, event);
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const HepMC::GenEvent &GenEvent = hHepMCProduct->getHepMCData();
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for (HepMC::GenEvent::particle_const_iterator pgen = 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)
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continue;
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HepMC::GenVertex *dvtx = mcPart->end_vertex();
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if (dvtx) {
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vtx = dvtx->point3d().x()/10.0;
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vty = dvtx->point3d().y()/10.0;
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vtz = dvtx->point3d().z()/10.0;
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break;
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}
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}
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} else { /*useAodGen_*/
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Handle<reco::GenParticleCollection> hGenPProduct;
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GetProduct(edmName_, hGenPProduct, event);
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const reco::GenParticleCollection genParticles = *(hGenPProduct.product());
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for (reco::GenParticleCollection::const_iterator pgen = genParticles.begin();
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pgen != genParticles.end(); ++pgen) {
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int found = 0;
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for (unsigned int i=0; i<pgen->numberOfDaughters(); ++i) {
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const reco::Candidate *dau = pgen->daughter(i);
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if (dau) {
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vtx = dau->vx();
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vty = dau->vy();
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vtz = dau->vz();
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found = 1;
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break;
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}
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}
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if (found)
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break;
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}
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}
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mithep::Vertex *newvtx = vertexes_->Allocate();
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new (newvtx) mithep::Vertex(vtx, vty, vtz);
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vertexes_->Trim();
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}
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