ChargeIsolation.h

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/* 
Functions to define isolation with respect to charge particles

Authors:  Seema Sharma, Sunanda Banerjee
Created: August 2009
*/

#ifndef CalibrationIsolatedParticlesChargeIsolation_h
#define CalibrationIsolatedParticlesChargeIsolation_h

// system include files
#include <memory>
#include <cmath>
#include <string>
#include <map>
#include <vector>

// user include files
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"

#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/EcalRecHit/interface/EcalRecHitCollections.h"
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"

#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloSubdetectorGeometry.h"
#include "Geometry/CaloTopology/interface/CaloTopology.h"
#include "Geometry/CaloTopology/interface/HcalTopology.h"
#include "MagneticField/Engine/interface/MagneticField.h"

#include "TrackingTools/TrackAssociator/interface/TrackDetectorAssociator.h"
#include "Calibration/IsolatedParticles/interface/CaloPropagateTrack.h"

namespace spr {
  // Returns the maximum energy of a track within a NxN matrix around the
  // impact of a given track on the ECAL surface. It assumes that all tracks
  // are extrapolated to the ECAL surface and stored in a vectore *vdetIds*
  double chargeIsolationEcal(unsigned int trkIndex,
                             std::vector<spr::propagatedTrackID>& vdetIds,
                             const CaloGeometry* geo,
                             const CaloTopology* caloTopology,
                             int ieta,
                             int iphi,
                             bool debug = false);

  // Returns the maximum energy of a track within a NxN matrix around the
  // impact of a given track on the ECAL surface. It extrapolates all tracks
  // in the collection to the ECAL surface in order to do the tests
  double chargeIsolationEcal(const DetId& coreDet,
                             reco::TrackCollection::const_iterator trkItr,
                             edm::Handle<reco::TrackCollection> trkCollection,
                             const CaloGeometry* geo,
                             const CaloTopology* caloTopology,
                             const MagneticField* bField,
                             int ieta,
                             int iphi,
                             const std::string& theTrackQuality,
                             bool debug = false);

  // Returns the maximum energy of a track within a NxN matrix around the
  // impact of a given track on the HCAL surface. It assumes that all tracks
  // are extrapolated to the HCAL surface and stored in a vectore *vdetIds*
  double chargeIsolationHcal(unsigned int trkIndex,
                             std::vector<spr::propagatedTrackID>& vdetIds,
                             const HcalTopology* topology,
                             int ieta,
                             int iphi,
                             bool debug = false);

  // Returns the maximum energy of a track within a NxN matrix around the
  // impact of a given track on the HCAL surface. It extrapolates all tracks
  // in the collection to the HCAL surface in order to do the tests
  double chargeIsolationHcal(reco::TrackCollection::const_iterator trkItr,
                             edm::Handle<reco::TrackCollection> trkCollection,
                             const DetId ClosestCell,
                             const HcalTopology* topology,
                             const CaloSubdetectorGeometry* gHB,
                             const MagneticField* bField,
                             int ieta,
                             int iphi,
                             const std::string& theTrackQuality,
                             bool debug = false);

  bool chargeIsolation(const DetId anyCell, std::vector<DetId>& vdets);

  // Returns the maximum energy of a track within a cone of radius *dR*
  // around the impact poiunt to the ECAL surface
  double coneChargeIsolation(const edm::Event& iEvent,
                             const edm::EventSetup& iSetup,
                             reco::TrackCollection::const_iterator trkItr,
                             edm::Handle<reco::TrackCollection> trkCollection,
                             TrackDetectorAssociator& associator,
                             TrackAssociatorParameters& parameters_,
                             const std::string& theTrackQuality,
                             int& nNearTRKs,
                             int& nLayers_maxNearP,
                             int& trkQual_maxNearP,
                             double& maxNearP_goodTrk,
                             const GlobalPoint& hpoint1,
                             const GlobalVector& trackMom,
                             double dR);
  double chargeIsolationCone(unsigned int trkIndex,
                             std::vector<spr::propagatedTrackDirection>& trkDirs,
                             double dR,
                             int& nNearTRKs,
                             bool debug = false);
  std::pair<double, double> chargeIsolationCone(unsigned int trkIndex,
                                                std::vector<spr::propagatedTrackDirection>& trkDirs,
                                                double dR,
                                                bool debug = false);

  int coneChargeIsolation(const GlobalPoint& hpoint1,
                          const GlobalPoint& point2,
                          const GlobalVector& trackMom,
                          double dR);

}  // namespace spr

#endif