/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/Alignment/OfflineValidation/plugins/EopTreeWriter.cc

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// -*- C++ -*-
//
// Package:    EopTreeWriter
// Class:      EopTreeWriter
// 
//
// Original Author:  Holger Enderle
//         Created:  Thu Dec  4 11:22:48 CET 2008
// $Id: EopTreeWriter.cc,v 1.3 2012/03/02 07:46:48 mussgill Exp $
//
//

// framework include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDAnalyzer.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/ServiceRegistry/interface/Service.h"

// user include files
#include <DataFormats/TrackReco/interface/Track.h>
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include <TMath.h>
#include <TH1.h>
#include "TTree.h"

#include "CommonTools/UtilAlgos/interface/TFileService.h"
#include "CommonTools/Utils/interface/TFileDirectory.h"

#include "TrackingTools/TrackAssociator/interface/TrackDetectorAssociator.h"
#include "TrackingTools/TrackAssociator/interface/TrackAssociatorParameters.h"
#include "TrackingTools/GeomPropagators/interface/PropagationExceptions.h"
#include "TrackPropagation/SteppingHelixPropagator/interface/SteppingHelixPropagator.h"

#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/JetReco/interface/CaloJet.h"
#include "DataFormats/CaloTowers/interface/CaloTowerFwd.h"
#include "SimDataFormats/GeneratorProducts/interface/GenEventInfoProduct.h"

#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/Records/interface/CaloGeometryRecord.h"

#include "DataFormats/HcalIsolatedTrack/interface/IsolatedPixelTrackCandidateFwd.h"
#include "DataFormats/HcalIsolatedTrack/interface/IsolatedPixelTrackCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoCaloTowerCandidate.h"
#include "DataFormats/HcalRecHit/interface/HcalRecHitCollections.h"
#include "DataFormats/EcalRecHit/interface/EcalRecHitCollections.h"
#include "DataFormats/DTRecHit/interface/DTRecHitCollection.h"

#include "Alignment/OfflineValidation/interface/EopVariables.h"

//
// class decleration
//

class EopTreeWriter : public edm::EDAnalyzer {
   public:
      explicit EopTreeWriter(const edm::ParameterSet&);
      ~EopTreeWriter();


   private:
      virtual void beginJob() ;
      virtual void analyze(const edm::Event&, const edm::EventSetup&);
      virtual void endJob() ;

      double getDistInCM(double eta1, double phi1, double eta2, double phi2);

      // ----------member data ---------------------------
      edm::InputTag src_;

      edm::Service<TFileService> fs_;
      TTree *tree_;
      EopVariables *treeMemPtr_;
      TrackDetectorAssociator trackAssociator_;
      TrackAssociatorParameters parameters_;
};

//
// constants, enums and typedefs
//

//
// static data member definitions
//

//
// constructors and destructor
//
EopTreeWriter::EopTreeWriter(const edm::ParameterSet& iConfig) :
  src_(iConfig.getParameter<edm::InputTag>("src"))
{
   //now do what ever initialization is needed

   // TrackAssociator parameters
   edm::ParameterSet parameters = iConfig.getParameter<edm::ParameterSet>("TrackAssociatorParameters");
   parameters_.loadParameters( parameters );

   tree_ = fs_->make<TTree>("EopTree","EopTree");
   treeMemPtr_ = new EopVariables;
   tree_->Branch("EopVariables", &treeMemPtr_); // address of pointer!
}


EopTreeWriter::~EopTreeWriter()
{
 
   // do anything here that needs to be done at destruction time
   // (e.g. close files, deallocate resources etc.)

}


//
// member functions
//

// ------------ method called to for each event  ------------
void
EopTreeWriter::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup)
{
   using namespace edm;

   // get geometry
   edm::ESHandle<CaloGeometry> geometry;
   iSetup.get<CaloGeometryRecord>().get(geometry);
   const CaloGeometry* geo = geometry.product();
//    const CaloSubdetectorGeometry* towerGeometry = 
//      geo->getSubdetectorGeometry(DetId::Calo, CaloTowerDetId::SubdetId);

   // temporary collection of EB+EE recHits
   std::auto_ptr<EcalRecHitCollection> tmpEcalRecHitCollection(new EcalRecHitCollection);
   std::vector<edm::InputTag> ecalLabels_;

   edm::Handle<EcalRecHitCollection> tmpEc;
   bool ecalInAlca = iEvent.getByLabel(edm::InputTag("IsoProd","IsoTrackEcalRecHitCollection"),tmpEc);
   bool ecalInReco = iEvent.getByLabel(edm::InputTag("ecalRecHit","EcalRecHitsEB"),tmpEc)&& 
                     iEvent.getByLabel(edm::InputTag("ecalRecHit","EcalRecHitsEE"),tmpEc);
   if(ecalInAlca)ecalLabels_.push_back(edm::InputTag("IsoProd","IsoTrackEcalRecHitCollection"));
   else if(ecalInReco){
     ecalLabels_.push_back(edm::InputTag("ecalRecHit","EcalRecHitsEB"));
     ecalLabels_.push_back(edm::InputTag("ecalRecHit","EcalRecHitsEE"));
   }
   else throw cms::Exception("MissingProduct","can not find EcalRecHits");

   std::vector<edm::InputTag>::const_iterator i;
   for (i=ecalLabels_.begin(); i!=ecalLabels_.end(); i++) 
     {
       edm::Handle<EcalRecHitCollection> ec;
       iEvent.getByLabel(*i,ec);
       for(EcalRecHitCollection::const_iterator recHit = (*ec).begin(); recHit != (*ec).end(); ++recHit)
         {
           tmpEcalRecHitCollection->push_back(*recHit);
         }
     }      
   
   edm::Handle<reco::TrackCollection> tracks;
   iEvent.getByLabel(src_, tracks);

   edm::Handle<reco::IsolatedPixelTrackCandidateCollection> isoPixelTracks;
   edm::Handle<reco::IsolatedPixelTrackCandidateCollection> tmpPix;
   bool pixelInAlca = iEvent.getByLabel(edm::InputTag("IsoProd","HcalIsolatedTrackCollection"),tmpPix);
   if(pixelInAlca)iEvent.getByLabel(edm::InputTag("IsoProd","HcalIsolatedTrackCollection"),isoPixelTracks);

   Double_t trackemc1;
   Double_t trackemc3;
   Double_t trackemc5;
   Double_t trackhac1;
   Double_t trackhac3;
   Double_t trackhac5;
   Double_t maxPNearby;
   Double_t dist;
   Double_t EnergyIn;
   Double_t EnergyOut;

   parameters_.useMuon = false;

   if(pixelInAlca)
     if(isoPixelTracks->size()==0) return;

   for(reco::TrackCollection::const_iterator track = tracks->begin();track!=tracks->end();++track){

     bool noChargedTracks = true;

     if(track->p()<9.) continue;

     trackAssociator_.useDefaultPropagator();
     TrackDetMatchInfo info = trackAssociator_.associate(iEvent, iSetup, trackAssociator_.getFreeTrajectoryState(iSetup, *track), parameters_);

     trackemc1 = 0;
     trackemc3 = 0;
     trackemc5 = 0;
     trackhac1 = 0;
     trackhac3 = 0;
     trackhac5 = 0;
     
     trackemc1 = info.nXnEnergy(TrackDetMatchInfo::EcalRecHits, 0);
     trackemc3 = info.nXnEnergy(TrackDetMatchInfo::EcalRecHits, 1);
     trackemc5 = info.nXnEnergy(TrackDetMatchInfo::EcalRecHits, 2);
     trackhac1 = info.nXnEnergy(TrackDetMatchInfo::HcalRecHits, 0);
     trackhac3 = info.nXnEnergy(TrackDetMatchInfo::HcalRecHits, 1);
     trackhac5 = info.nXnEnergy(TrackDetMatchInfo::HcalRecHits, 2);

     if(trackhac3<5.) continue;

     double etaecal=info.trkGlobPosAtEcal.eta();
     double phiecal=info.trkGlobPosAtEcal.phi();
       
     maxPNearby=-10;
     dist=50;
     for (reco::TrackCollection::const_iterator track1 = tracks->begin(); track1!=tracks->end(); track1++)
       {
         if (track == track1) continue;
         TrackDetMatchInfo info1 = trackAssociator_.associate(iEvent, iSetup, *track1, parameters_);
         double etaecal1=info1.trkGlobPosAtEcal.eta();
         double phiecal1=info1.trkGlobPosAtEcal.phi();

         if (etaecal1==0&&phiecal1==0) continue;        

         double ecDist=getDistInCM(etaecal,phiecal,etaecal1,phiecal1);

         if( ecDist <  40. ) 
           {
             //calculate maximum P and sum P near seed track
             if (track1->p()>maxPNearby)
               {
                 maxPNearby=track1->p();
                 dist = ecDist;
               }
             
             //apply loose isolation criteria
             if (track1->p()>5.) 
               {
                 noChargedTracks = false;
                 break;
               }
           }
       }
     EnergyIn=0;
     EnergyOut=0;
     if(noChargedTracks){
       for (std::vector<EcalRecHit>::const_iterator ehit=tmpEcalRecHitCollection->begin(); ehit!=tmpEcalRecHitCollection->end(); ehit++) 
         {
           // R-scheme of ECAL CLUSTERIZATION
           GlobalPoint posH = geo->getPosition((*ehit).detid());
           double phihit = posH.phi();
           double etahit = posH.eta();
           
           double dHitCM=getDistInCM(etaecal,phiecal,etahit,phihit);
           
           if (dHitCM<9.0)
             {
               EnergyIn+=ehit->energy();
             }
           if (dHitCM>15.0&&dHitCM<35.0)
             {
               EnergyOut+=ehit->energy();
             }
           
         }

       treeMemPtr_->fillVariables(track->charge(), track->innerOk(), track->outerRadius(),
                                  track->numberOfValidHits(), track->numberOfLostHits(),
                                  track->chi2(), track->normalizedChi2(),
                                  track->p(), track->pt(), track->ptError(), 
                                  track->theta(), track->eta(), track->phi(),
                                  trackemc1, trackemc3, trackemc5,
                                  trackhac1, trackhac3, trackhac5,
                                  maxPNearby, dist, EnergyIn, EnergyOut);
       
       tree_->Fill();
       }
   }
}


// ------------ method called once each job just before starting event loop  ------------
void 
EopTreeWriter::beginJob()
{
}

// ------------ method called once each job just after ending the event loop  ------------
void 
EopTreeWriter::endJob() {

  delete treeMemPtr_; treeMemPtr_ = 0;

}

double 
EopTreeWriter::getDistInCM(double eta1, double phi1, double eta2, double phi2)
{
  double deltaPhi=phi1-phi2;
  while(deltaPhi >   TMath::Pi())deltaPhi-=2*TMath::Pi();
  while(deltaPhi <= -TMath::Pi())deltaPhi+=2*TMath::Pi();
  double dR;
  // double Rec;
  double theta1=2*atan(exp(-eta1));
  double theta2=2*atan(exp(-eta2));
  double cotantheta1;
  if(cos(theta1)==0)cotantheta1=0;
  else cotantheta1=1/tan(theta1);
  double cotantheta2;
  if(cos(theta2)==0)cotantheta2=0;
  else cotantheta2=1/tan(theta2);
  // if (fabs(eta1)<1.479) Rec=129; //radius of ECAL barrel
  // else Rec=317; //distance from IP to ECAL endcap
  //|vect| times tg of acos(scalar product)
  // dR=fabs((Rec/sin(theta1))*tan(acos(sin(theta1)*sin(theta2)*(sin(phi1)*sin(phi2)+cos(phi1)*cos(phi2))+cos(theta1)*cos(theta2))));
  if(fabs(eta1)<1.479)dR=129*sqrt((cotantheta1-cotantheta2)*(cotantheta1-cotantheta2)+deltaPhi*deltaPhi);
  else dR=317*sqrt(tan(theta1)*tan(theta1)+tan(theta2)*tan(theta2)-2*tan(theta1)*tan(theta2)*cos(deltaPhi));
  return dR;
}

//define this as a plug-in
DEFINE_FWK_MODULE(EopTreeWriter);