#include <Basic2DGenericPFlowClusterizer.h>

Inheritance diagram for Basic2DGenericPFlowClusterizer:

Public Member Functions
	Basic2DGenericPFlowClusterizer (const edm::ParameterSet &conf)

	Basic2DGenericPFlowClusterizer (const B2DGPF &)=delete

void	buildClusters (const reco::PFClusterCollection &, const std::vector< bool > &, reco::PFClusterCollection &outclus) override

B2DGPF &	operator= (const B2DGPF &)=delete

void	update (const edm::EventSetup &es) override

	~Basic2DGenericPFlowClusterizer () override=default

Public Member Functions inherited from PFClusterBuilderBase
std::ostream &	operator<< (std::ostream &o) const

PFCBB &	operator= (const PFCBB &)=delete

	PFClusterBuilderBase (const edm::ParameterSet &conf)

	PFClusterBuilderBase (const PFCBB &)=delete

void	reset ()

virtual	~PFClusterBuilderBase ()=default

Private Types
typedef Basic2DGenericPFlowClusterizer	B2DGPF

Private Member Functions
void	growPFClusters (const reco::PFCluster &, const std::vector< bool > &, const unsigned toleranceScaling, const unsigned iter, double dist, reco::PFClusterCollection &) const

void	prunePFClusters (reco::PFClusterCollection &) const

void	seedPFClustersFromTopo (const reco::PFCluster &, const std::vector< bool > &, reco::PFClusterCollection &) const

Private Attributes
std::unique_ptr< PFCPositionCalculatorBase >	_allCellsPosCalc

std::unique_ptr< PFCPositionCalculatorBase >	_convergencePosCalc

const bool	_excludeOtherSeeds

const std::unordered_map< std::string, int >	_layerMap

const unsigned	_maxIterations

const double	_minFracTot

std::unordered_map< int, std::pair< std::vector< int >, std::vector< double > > >	_recHitEnergyNorms

const double	_showerSigma2

const double	_stoppingTolerance

Additional Inherited Members
Public Types inherited from PFClusterBuilderBase
typedef PFCPositionCalculatorBase	PosCalc

Protected Attributes inherited from PFClusterBuilderBase
const float	_minFractionToKeep

unsigned	_nClustersFound

unsigned	_nSeeds

std::unique_ptr< PosCalc >	_positionCalc

Detailed Description

Definition at line 9 of file Basic2DGenericPFlowClusterizer.h.

Member Typedef Documentation

typedef Basic2DGenericPFlowClusterizer Basic2DGenericPFlowClusterizer::B2DGPF

private

Definition at line 10 of file Basic2DGenericPFlowClusterizer.h.

Constructor & Destructor Documentation

Basic2DGenericPFlowClusterizer::Basic2DGenericPFlowClusterizer ( const edm::ParameterSet & conf )

Definition at line 24 of file Basic2DGenericPFlowClusterizer.cc.

References _allCellsPosCalc, _convergencePosCalc, _layerMap, _recHitEnergyNorms, customizeHLTforCMSSW::depths, PFLayer::ECAL_BARREL, PFLayer::ECAL_ENDCAP, mps_splice::entry, Exception, timingPdfMaker::get, edm::ParameterSet::getParameter(), edm::ParameterSet::getParameterSet(), PFLayer::HCAL_BARREL1, PFLayer::HCAL_BARREL2, PFLayer::HCAL_ENDCAP, PFLayer::HF_EM, PFLayer::HF_HAD, createfilelist::int, PFLayer::NONE, PFLayer::PS1, PFLayer::PS2, muonDTDigis_cfi::pset, AlCaHLTBitMon_QueryRunRegistry::string, and particleFlowZeroSuppressionECAL_cff::thresholds.

     : PFClusterBuilderBase(conf),
       _maxIterations(conf.getParameter<unsigned>("maxIterations")),
       _stoppingTolerance(conf.getParameter<double>("stoppingTolerance")),
       _showerSigma2(std::pow(conf.getParameter<double>("showerSigma"), 2.0)),
       _excludeOtherSeeds(conf.getParameter<bool>("excludeOtherSeeds")),
       _minFracTot(conf.getParameter<double>("minFracTot")),
       _layerMap({{"PS2", (int)PFLayer::PS2},
                  {"PS1", (int)PFLayer::PS1},
                  {"ECAL_ENDCAP", (int)PFLayer::ECAL_ENDCAP},
                  {"ECAL_BARREL", (int)PFLayer::ECAL_BARREL},
                  {"NONE", (int)PFLayer::NONE},
                  {"HCAL_BARREL1", (int)PFLayer::HCAL_BARREL1},
                  {"HCAL_BARREL2_RING0", (int)PFLayer::HCAL_BARREL2},
                  {"HCAL_BARREL2_RING1", 100 * (int)PFLayer::HCAL_BARREL2},
                  {"HCAL_ENDCAP", (int)PFLayer::HCAL_ENDCAP},
                  {"HF_EM", (int)PFLayer::HF_EM},
                  {"HF_HAD", (int)PFLayer::HF_HAD}}) {
   const std::vector<edm::ParameterSet>& thresholds = conf.getParameterSetVector("recHitEnergyNorms");
   for (const auto& pset : thresholds) {
     const std::string& det = pset.getParameter<std::string>("detector");
 
     std::vector<int> depths;
     std::vector<double> rhE_norm;
 
     if (det == std::string("HCAL_BARREL1") || det == std::string("HCAL_ENDCAP")) {
       depths = pset.getParameter<std::vector<int> >("depths");
       rhE_norm = pset.getParameter<std::vector<double> >("recHitEnergyNorm");
     } else {
       depths.push_back(0);
       rhE_norm.push_back(pset.getParameter<double>("recHitEnergyNorm"));
     }
 
     if (rhE_norm.size() != depths.size()) {
       throw cms::Exception("InvalidPFRecHitThreshold")
           << "PFlowClusterizerThreshold mismatch with the numbers of depths";
     }
 
     auto entry = _layerMap.find(det);
     if (entry == _layerMap.end()) {
       throw cms::Exception("InvalidDetectorLayer") << "Detector layer : " << det << " is not in the list of recognized"
                                                    << " detector layers!";
     }
     _recHitEnergyNorms.emplace(_layerMap.find(det)->second, std::make_pair(depths, rhE_norm));
   }
 
   if (conf.exists("allCellsPositionCalc")) {
     const edm::ParameterSet& acConf = conf.getParameterSet("allCellsPositionCalc");
     const std::string& algoac = acConf.getParameter<std::string>("algoName");
     _allCellsPosCalc = PFCPositionCalculatorFactory::get()->create(algoac, acConf);
   }
   // if necessary a third pos calc for convergence testing
   if (conf.exists("positionCalcForConvergence")) {
     const edm::ParameterSet& convConf = conf.getParameterSet("positionCalcForConvergence");
     const std::string& algoconv = convConf.getParameter<std::string>("algoName");
     _convergencePosCalc = PFCPositionCalculatorFactory::get()->create(algoconv, convConf);
   }
 }

Basic2DGenericPFlowClusterizer::~Basic2DGenericPFlowClusterizer ( )

overridedefault

Basic2DGenericPFlowClusterizer::Basic2DGenericPFlowClusterizer ( const B2DGPF & )

delete

Member Function Documentation

void Basic2DGenericPFlowClusterizer::buildClusters	(	const reco::PFClusterCollection &	input,
		const std::vector< bool > &	seedable,
		reco::PFClusterCollection &	outclus
	)

overridevirtual

Implements PFClusterBuilderBase.

Definition at line 83 of file Basic2DGenericPFlowClusterizer.cc.

References _allCellsPosCalc, _convergencePosCalc, PFClusterBuilderBase::_positionCalc, growPFClusters(), SiStripPI::max, eostools::move(), funct::pow(), prunePFClusters(), and seedPFClustersFromTopo().

Referenced by update().

                                                                                     {
   reco::PFClusterCollection clustersInTopo;
   for (const auto& topocluster : input) {
     clustersInTopo.clear();
     seedPFClustersFromTopo(topocluster, seedable, clustersInTopo);
     const unsigned tolScal = std::pow(std::max(1.0, clustersInTopo.size() - 1.0), 2.0);
     growPFClusters(topocluster, seedable, tolScal, 0, tolScal, clustersInTopo);
     // step added by Josh Bendavid, removes low-fraction clusters
     // did not impact position resolution with fraction cut of 1e-7
     // decreases the size of each pf cluster considerably
     prunePFClusters(clustersInTopo);
     // recalculate the positions of the pruned clusters
     if (_convergencePosCalc) {
       // if defined, use the special position calculation for convergence tests
       _convergencePosCalc->calculateAndSetPositions(clustersInTopo);
     } else {
       if (clustersInTopo.size() == 1 && _allCellsPosCalc) {
         _allCellsPosCalc->calculateAndSetPosition(clustersInTopo.back());
       } else {
         _positionCalc->calculateAndSetPositions(clustersInTopo);
       }
     }
     for (auto& clusterout : clustersInTopo) {
       output.insert(output.end(), std::move(clusterout));
     }
   }
 }

void Basic2DGenericPFlowClusterizer::growPFClusters	(	const reco::PFCluster &	topo,
		const std::vector< bool > &	seedable,
		const unsigned	toleranceScaling,
		const unsigned	iter,
		double	dist,
		reco::PFClusterCollection &	clusters
	)		const

private

Definition at line 132 of file Basic2DGenericPFlowClusterizer.cc.

References _allCellsPosCalc, _convergencePosCalc, _excludeOtherSeeds, _maxIterations, _minFracTot, PFClusterBuilderBase::_positionCalc, _recHitEnergyNorms, _showerSigma2, _stoppingTolerance, funct::abs(), reco::deltaR2(), LEDCalibrationChannels::depth, change_name::diff, myMath::fast_expf(), cropTnPTrees::frac, HLT_2018_cff::fraction, PFLayer::HCAL_BARREL1, PFLayer::HCAL_BARREL2, PFLayer::HCAL_ENDCAP, mps_fire::i, createfilelist::int, dqmiolumiharvest::j, edm::Ref< C, T, F >::key(), LOGDRESSED, HLT_2018_cff::recHitEnergyNorm, reco::PFCluster::recHitFractions(), and mathSSE::sqrt().

Referenced by buildClusters().

                                                                                              {
   if (iter >= _maxIterations) {
     LOGDRESSED("Basic2DGenericPFlowClusterizer:growAndStabilizePFClusters")
         << "reached " << _maxIterations << " iterations, terminated position "
         << "fit with diff = " << diff;
   }
   if (iter >= _maxIterations || diff <= _stoppingTolerance * toleranceScaling)
     return;
   // reset the rechits in this cluster, keeping the previous position
   std::vector<reco::PFCluster::REPPoint> clus_prev_pos;
   for (auto& cluster : clusters) {
     const reco::PFCluster::REPPoint& repp = cluster.positionREP();
     clus_prev_pos.emplace_back(repp.rho(), repp.eta(), repp.phi());
     if (_convergencePosCalc) {
       if (clusters.size() == 1 && _allCellsPosCalc) {
         _allCellsPosCalc->calculateAndSetPosition(cluster);
       } else {
         _positionCalc->calculateAndSetPosition(cluster);
       }
     }
     cluster.resetHitsAndFractions();
   }
   // loop over topo cluster and grow current PFCluster hypothesis
   std::vector<double> dist2, frac;
   double fractot = 0;
   for (const reco::PFRecHitFraction& rhf : topo.recHitFractions()) {
     const reco::PFRecHitRef& refhit = rhf.recHitRef();
     int cell_layer = (int)refhit->layer();
     if (cell_layer == PFLayer::HCAL_BARREL2 && std::abs(refhit->positionREP().eta()) > 0.34) {
       cell_layer *= 100;
     }
 
     math::XYZPoint topocellpos_xyz(refhit->position());
     dist2.clear();
     frac.clear();
     fractot = 0;
 
     double recHitEnergyNorm = 0.;
     auto const& recHitEnergyNormDepthPair = _recHitEnergyNorms.find(cell_layer)->second;
 
     for (unsigned int j = 0; j < recHitEnergyNormDepthPair.second.size(); ++j) {
       int depth = recHitEnergyNormDepthPair.first[j];
 
       if ((cell_layer == PFLayer::HCAL_BARREL1 && refhit->depth() == depth) ||
           (cell_layer == PFLayer::HCAL_ENDCAP && refhit->depth() == depth) ||
           (cell_layer != PFLayer::HCAL_ENDCAP && cell_layer != PFLayer::HCAL_BARREL1))
         recHitEnergyNorm = recHitEnergyNormDepthPair.second[j];
     }
 
     // add rechits to clusters, calculating fraction based on distance
     for (auto& cluster : clusters) {
       const math::XYZPoint& clusterpos_xyz = cluster.position();
       const math::XYZVector deltav = clusterpos_xyz - topocellpos_xyz;
       const double d2 = deltav.Mag2() / _showerSigma2;
       dist2.emplace_back(d2);
       if (d2 > 100) {
         LOGDRESSED("Basic2DGenericPFlowClusterizer:growAndStabilizePFClusters")
             << "Warning! :: pfcluster-topocell distance is too large! d= " << d2;
       }
 
       // fraction assignment logic
       double fraction;
       if (refhit->detId() == cluster.seed() && _excludeOtherSeeds) {
         fraction = 1.0;
       } else if (seedable[refhit.key()] && _excludeOtherSeeds) {
         fraction = 0.0;
       } else {
         fraction = cluster.energy() / recHitEnergyNorm * vdt::fast_expf(-0.5 * d2);
       }
       fractot += fraction;
       frac.emplace_back(fraction);
     }
     for (unsigned i = 0; i < clusters.size(); ++i) {
       if (fractot > _minFracTot || (refhit->detId() == clusters[i].seed() && fractot > 0.0)) {
         frac[i] /= fractot;
       } else {
         continue;
       }
       // if the fraction has been set to 0, the cell
       // is now added to the cluster - careful ! (PJ, 19/07/08)
       // BUT KEEP ONLY CLOSE CELLS OTHERWISE MEMORY JUST EXPLOSES
       // (PJ, 15/09/08 <- similar to what existed before the
       // previous bug fix, but keeps the close seeds inside,
       // even if their fraction was set to zero.)
       // Also add a protection to keep the seed in the cluster
       // when the latter gets far from the former. These cases
       // (about 1% of the clusters) need to be studied, as
       // they create fake photons, in general.
       // (PJ, 16/09/08)
       if (dist2[i] < 100.0 || frac[i] > 0.9999) {
         clusters[i].addRecHitFraction(reco::PFRecHitFraction(refhit, frac[i]));
       }
     }
   }
   // recalculate positions and calculate convergence parameter
   double diff2 = 0.0;
   for (unsigned i = 0; i < clusters.size(); ++i) {
     if (_convergencePosCalc) {
       _convergencePosCalc->calculateAndSetPosition(clusters[i]);
     } else {
       if (clusters.size() == 1 && _allCellsPosCalc) {
         _allCellsPosCalc->calculateAndSetPosition(clusters[i]);
       } else {
         _positionCalc->calculateAndSetPosition(clusters[i]);
       }
     }
     const double delta2 = reco::deltaR2(clusters[i].positionREP(), clus_prev_pos[i]);
     if (delta2 > diff2)
       diff2 = delta2;
   }
   diff = std::sqrt(diff2);
   dist2.clear();
   frac.clear();
   clus_prev_pos.clear();  // avoid badness
   growPFClusters(topo, seedable, toleranceScaling, iter + 1, diff, clusters);
 }

B2DGPF& Basic2DGenericPFlowClusterizer::operator= ( const B2DGPF & )

delete

void Basic2DGenericPFlowClusterizer::prunePFClusters ( reco::PFClusterCollection & clusters ) const

private

Definition at line 254 of file Basic2DGenericPFlowClusterizer.cc.

References PFClusterBuilderBase::_minFractionToKeep, and reco::PFRecHitFraction::fraction().

Referenced by buildClusters().

                                                                                             {
   for (auto& cluster : clusters) {
     cluster.pruneUsing([&](const reco::PFRecHitFraction& rhf) { return rhf.fraction() > _minFractionToKeep; });
   }
 }

void Basic2DGenericPFlowClusterizer::seedPFClustersFromTopo	(	const reco::PFCluster &	topo,
		const std::vector< bool > &	seedable,
		reco::PFClusterCollection &	initialPFClusters
	)		const

private

Definition at line 113 of file Basic2DGenericPFlowClusterizer.cc.

References _convergencePosCalc, PFClusterBuilderBase::_positionCalc, reco::PFCluster::addRecHitFraction(), reco::PFCluster::recHitFractions(), and reco::CaloCluster::setSeed().

Referenced by buildClusters().

                                                                                                               {
   const auto& recHitFractions = topo.recHitFractions();
   for (const auto& rhf : recHitFractions) {
     if (!seedable[rhf.recHitRef().key()])
       continue;
     initialPFClusters.push_back(reco::PFCluster());
     reco::PFCluster& current = initialPFClusters.back();
     current.addRecHitFraction(rhf);
     current.setSeed(rhf.recHitRef()->detId());
     if (_convergencePosCalc) {
       _convergencePosCalc->calculateAndSetPosition(current);
     } else {
       _positionCalc->calculateAndSetPosition(current);
     }
   }
 }

void Basic2DGenericPFlowClusterizer::update ( const edm::EventSetup & es )

inlineoverridevirtual

Reimplemented from PFClusterBuilderBase.

Definition at line 19 of file Basic2DGenericPFlowClusterizer.h.

References _allCellsPosCalc, _convergencePosCalc, PFClusterBuilderBase::_positionCalc, and buildClusters().

                                                 {
     _positionCalc->update(es);
     if (_allCellsPosCalc)
       _allCellsPosCalc->update(es);
     if (_convergencePosCalc)
       _convergencePosCalc->update(es);
   }