/data/refman/pasoursint/CMSSW_5_2_9/src/SimTracker/TrackHistory/src/JetVetoedTracksAssociatorDRVertex.cc

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#include "SimTracker/TrackHistory/interface/JetVetoedTracksAssociatorDRVertex.h"


JetVetoedTracksAssociationDRVertex::JetVetoedTracksAssociationDRVertex (double dr) : mDeltaR2Threshold(dr*dr) {}


void JetVetoedTracksAssociationDRVertex::produce (
    reco::JetTracksAssociation::Container* fAssociation,
    const std::vector<edm::RefToBase<reco::Jet> >& fJets,
    const std::vector<reco::TrackRef>& fTracks,
    TrackClassifier & classifier
) const
{
    // cache tracks kinematics
    std::vector <math::RhoEtaPhiVector> trackP3s;
    trackP3s.reserve (fTracks.size());
    for (unsigned i = 0; i < fTracks.size(); ++i)
    {
        const reco::Track* track = &*(fTracks[i]);
        trackP3s.push_back (math::RhoEtaPhiVector (track->p(),track->eta(), track->phi()));
    }
    //loop on jets and associate
    for (unsigned j = 0; j < fJets.size(); ++j)
    {
        reco::TrackRefVector assoTracks;
        const reco::Jet* jet = &*(fJets[j]);
        double jetEta = jet->eta();
        double jetPhi = jet->phi();
        for (unsigned t = 0; t < fTracks.size(); ++t)
        {
            double dR2 = deltaR2 (jetEta, jetPhi, trackP3s[t].eta(), trackP3s[t].phi());
            classifier.evaluate( reco::TrackBaseRef(fTracks[t]) );
            if (
                dR2 < mDeltaR2Threshold &&
                (
                    classifier.is(TrackClassifier::BWeakDecay) ||
                    classifier.is(TrackClassifier::CWeakDecay) ||
                    classifier.is(TrackClassifier::PrimaryVertex)
                )
            ) assoTracks.push_back (fTracks[t]);
        }
        reco::JetTracksAssociation::setValue (fAssociation, fJets[j], assoTracks);
    }
}