MultiTrackValidatorGenPs.cc

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#include "Validation/RecoTrack/interface/MultiTrackValidatorGenPs.h"
#include "DQMServices/ClientConfig/interface/FitSlicesYTool.h"

#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
#include "SimDataFormats/Track/interface/SimTrackContainer.h"
#include "SimDataFormats/Vertex/interface/SimVertexContainer.h"
#include "SimTracker/TrackerHitAssociation/interface/TrackerHitAssociator.h"
#include "SimDataFormats/TrackingAnalysis/interface/TrackingParticle.h"
#include "SimDataFormats/TrackingAnalysis/interface/TrackingVertex.h"
#include "SimDataFormats/TrackingAnalysis/interface/TrackingVertexContainer.h"
#include "SimDataFormats/PileupSummaryInfo/interface/PileupSummaryInfo.h"
#include "SimDataFormats/EncodedEventId/interface/EncodedEventId.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "TrackingTools/PatternTools/interface/TSCBLBuilderNoMaterial.h"
#include "SimTracker/TrackAssociation/plugins/ParametersDefinerForTPESProducer.h"
#include "SimTracker/TrackAssociation/plugins/CosmicParametersDefinerForTPESProducer.h"

#include "DataFormats/TrackReco/interface/DeDxData.h"
#include "DataFormats/Common/interface/ValueMap.h"
#include "DataFormats/Common/interface/Ref.h"

#include "TMath.h"
#include <TF1.h>

//#include <iostream>

using namespace std;
using namespace edm;

static const std::string kTrackAssociatorByChi2("trackAssociatorByChi2");

MultiTrackValidatorGenPs::MultiTrackValidatorGenPs(const edm::ParameterSet& pset):MultiTrackValidator(pset){

  gpSelector = GenParticleCustomSelector(pset.getParameter<double>("ptMinGP"),
                     pset.getParameter<double>("minRapidityGP"),
                     pset.getParameter<double>("maxRapidityGP"),
                     pset.getParameter<double>("tipGP"),
                     pset.getParameter<double>("lipGP"),
                     pset.getParameter<bool>("chargedOnlyGP"),
                     pset.getParameter<int>("statusGP"),
                     pset.getParameter<std::vector<int> >("pdgIdGP"));

  if(UseAssociators) {
    for(auto const& src: associators) {
      if( src.label() == kTrackAssociatorByChi2) {
        label_gen_associator = consumes<reco::TrackToGenParticleAssociator>(src);
        break;
      }
    }
  }
  else {
    for (auto const& src: associators) {
      associatormapGtR = consumes<reco::GenToRecoCollection>(src);
      associatormapRtG = consumes<reco::RecoToGenCollection>(src);
      break;
    }
  }
}

MultiTrackValidatorGenPs::~MultiTrackValidatorGenPs(){}


void MultiTrackValidatorGenPs::analyze(const edm::Event& event, const edm::EventSetup& setup){
  using namespace reco;
  
  edm::LogInfo("TrackValidator") << "\n====================================================" << "\n"
                 << "Analyzing new event" << "\n"
                 << "====================================================\n" << "\n";

  edm::ESHandle<ParametersDefinerForTP> parametersDefinerTP; 
  setup.get<TrackAssociatorRecord>().get(parametersDefiner,parametersDefinerTP);    
  
  edm::Handle<GenParticleCollection>  TPCollectionHeff ;
  event.getByToken(label_tp_effic,TPCollectionHeff);
  const GenParticleCollection tPCeff = *(TPCollectionHeff.product());
  
  edm::Handle<GenParticleCollection>  TPCollectionHfake ;
  event.getByToken(label_tp_fake,TPCollectionHfake);
  const GenParticleCollection tPCfake = *(TPCollectionHfake.product());
  
  //if (tPCeff.size()==0) {edm::LogInfo("TrackValidator") 
  //<< "TP Collection for efficiency studies has size = 0! Skipping Event." ; return;}
  //if (tPCfake.size()==0) {edm::LogInfo("TrackValidator") 
  //<< "TP Collection for fake rate studies has size = 0! Skipping Event." ; return;}
  
  edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
  event.getByToken(bsSrc,recoBeamSpotHandle);
  reco::BeamSpot bs = *recoBeamSpotHandle;      
  
  edm::Handle< vector<PileupSummaryInfo> > puinfoH;
  event.getByToken(label_pileupinfo,puinfoH);
  PileupSummaryInfo puinfo;      
  
  for (unsigned int puinfo_ite=0;puinfo_ite<(*puinfoH).size();++puinfo_ite){ 
    if ((*puinfoH)[puinfo_ite].getBunchCrossing()==0){
      puinfo=(*puinfoH)[puinfo_ite];
      break;
    }
  }

  const reco::TrackToGenParticleAssociator* trackGenAssociator =nullptr;
  if(UseAssociators) {
    if(label_gen_associator.isUninitialized()) {
      return;
    }
    else {
      edm::Handle<reco::TrackToGenParticleAssociator> trackGenAssociatorH;
      event.getByToken(label_gen_associator,trackGenAssociatorH);
      trackGenAssociator = trackGenAssociatorH.product();
    }
  }
  else if(associatormapGtR.isUninitialized()) {
    return;
  }

  // dE/dx
  // at some point this could be generalized, with a vector of tags and a corresponding vector of Handles
  // I'm writing the interface such to take vectors of ValueMaps
  std::vector<const edm::ValueMap<reco::DeDxData> *> v_dEdx;
  if(dodEdxPlots_) {
    edm::Handle<edm::ValueMap<reco::DeDxData> > dEdx1Handle;
    edm::Handle<edm::ValueMap<reco::DeDxData> > dEdx2Handle;
    event.getByToken(m_dEdx1Tag, dEdx1Handle);
    event.getByToken(m_dEdx2Tag, dEdx2Handle);
    v_dEdx.push_back(dEdx1Handle.product());
    v_dEdx.push_back(dEdx2Handle.product());
  }

  int w=0; //counter counting the number of sets of histograms
  for (unsigned int www=0;www<label.size();www++){
    //
    //get collections from the event
    //
    edm::Handle<View<Track> >  trackCollection;
    if(!event.getByToken(labelToken[www], trackCollection)&&ignoremissingtkcollection_)continue;
    //if (trackCollection->size()==0) 
    //edm::LogInfo("TrackValidator") << "TrackCollection size = 0!" ; 
    //continue;
    //}
    reco::RecoToGenCollection recGenColl;
    reco::GenToRecoCollection genRecColl;
    //associate tracks
    if(UseAssociators){
      edm::LogVerbatim("TrackValidator") << "Analyzing " 
                                         << label[www].process()<<":"
                                         << label[www].label()<<":"
                                         << label[www].instance()<<" with "
                                         << kTrackAssociatorByChi2 <<"\n";
      
      LogTrace("TrackValidator") << "Calling associateRecoToGen method" << "\n";
      recGenColl=trackGenAssociator->associateRecoToGen(trackCollection,
                            TPCollectionHfake);
      LogTrace("TrackValidator") << "Calling associateGenToReco method" << "\n";
      genRecColl=trackGenAssociator->associateGenToReco(trackCollection,
                            TPCollectionHeff);
    }
    else{
      edm::LogVerbatim("TrackValidator") << "Analyzing " 
                                         << label[www].process()<<":"
                                         << label[www].label()<<":"
                                         << label[www].instance()<<" with "
                                         << associators[0] << "\n";
      
      Handle<reco::GenToRecoCollection > gentorecoCollectionH;
      event.getByToken(associatormapGtR,gentorecoCollectionH);
      genRecColl= *(gentorecoCollectionH.product()); 
      
      Handle<reco::RecoToGenCollection > recotogenCollectionH;
      event.getByToken(associatormapRtG,recotogenCollectionH);
      recGenColl= *(recotogenCollectionH.product()); 
    }



    // ########################################################
    // fill simulation histograms (LOOP OVER TRACKINGPARTICLES)
    // ########################################################
    
    //compute number of tracks per eta interval
    //
    edm::LogVerbatim("TrackValidator") << "\n# of GenParticles: " << tPCeff.size() << "\n";
    int ats(0);       //This counter counts the number of simTracks that are "associated" to recoTracks
    int st(0);        //This counter counts the number of simulated tracks passing the MTV selection (i.e. tpSelector(tp) )
    unsigned sts(0);   //This counter counts the number of simTracks surviving the bunchcrossing cut 
    unsigned asts(0);  //This counter counts the number of simTracks that are "associated" to recoTracks surviving the bunchcrossing cut
    for (GenParticleCollection::size_type i=0; i<tPCeff.size(); i++){ //loop over TPs collection for tracking efficiency
      GenParticleRef tpr(TPCollectionHeff, i);
      GenParticle* tp=const_cast<GenParticle*>(tpr.get());
      TrackingParticle::Vector momentumTP; 
      TrackingParticle::Point vertexTP;
      double dxyGen(0);
      double dzGen(0);
      
      
      //---------- THIS PART HAS TO BE CLEANED UP. THE PARAMETER DEFINER WAS NOT MEANT TO BE USED IN THIS WAY ----------
      //If the GenParticle is collison like, get the momentum and vertex at production state
      if(!parametersDefinerIsCosmic_)
        {
          //fixme this one shold be implemented
          if(! gpSelector(*tp)) continue;
          momentumTP = tp->momentum();
          vertexTP = tp->vertex();
          //Calcualte the impact parameters w.r.t. PCA
          TrackingParticle::Vector momentum = parametersDefinerTP->momentum(event,setup,*tp);
          TrackingParticle::Point vertex = parametersDefinerTP->vertex(event,setup,*tp);
          dxyGen = (-vertex.x()*sin(momentum.phi())+vertex.y()*cos(momentum.phi()));
          dzGen = vertex.z() - (vertex.x()*momentum.x()+vertex.y()*momentum.y())/sqrt(momentum.perp2()) 
            * momentum.z()/sqrt(momentum.perp2());
        }
      //If the GenParticle is comics, get the momentum and vertex at PCA
      else
        {
          //if(! cosmictpSelector(*tp,&bs,event,setup)) continue;   
          momentumTP = parametersDefinerTP->momentum(event,setup,*tp);
          vertexTP = parametersDefinerTP->vertex(event,setup,*tp);
          dxyGen = (-vertexTP.x()*sin(momentumTP.phi())+vertexTP.y()*cos(momentumTP.phi()));
          dzGen = vertexTP.z() - (vertexTP.x()*momentumTP.x()+vertexTP.y()*momentumTP.y())/sqrt(momentumTP.perp2()) 
            * momentumTP.z()/sqrt(momentumTP.perp2());
        }
      //---------- THE PART ABOVE HAS TO BE CLEANED UP. THE PARAMETER DEFINER WAS NOT MEANT TO BE USED IN THIS WAY ----------
      
      st++;   //This counter counts the number of simulated tracks passing the MTV selection (i.e. tpSelector(tp) )
      
      // in the coming lines, histos are filled using as input
      // - momentumTP 
      // - vertexTP 
      // - dxyGen
      // - dzGen
      
      if(doSimPlots_ && w == 0) {
        histoProducerAlgo_->fill_generic_simTrack_histos(momentumTP,vertexTP, tp->collisionId());//fixme: check meaning of collisionId
      }
      if(!doSimTrackPlots_)
        continue;
      
      
      // ##############################################
      // fill RecoAssociated GenTracks' histograms
      // ##############################################
      // bool isRecoMatched(false); // UNUSED
      const reco::Track* matchedTrackPointer=0;
      std::vector<std::pair<RefToBase<Track>, double> > rt;
      if(genRecColl.find(tpr) != genRecColl.end()){
        rt = (std::vector<std::pair<RefToBase<Track>, double> >) genRecColl[tpr];
        if (rt.size()!=0) {
          ats++; //This counter counts the number of simTracks that have a recoTrack associated
          // isRecoMatched = true; // UNUSED
          matchedTrackPointer = rt.begin()->first.get();
          edm::LogVerbatim("TrackValidator") << "GenParticle #" << st 
                                             << " with pt=" << sqrt(momentumTP.perp2()) 
                                             << " associated with quality:" << rt.begin()->second <<"\n";
        }
      }else{
        edm::LogVerbatim("TrackValidator") 
          << "GenParticle #" << st
          << " with pt,eta,phi: " 
          << sqrt(momentumTP.perp2()) << " , "
          << momentumTP.eta() << " , "
          << momentumTP.phi() << " , "
          << " NOT associated to any reco::Track" << "\n";
      }
      
      
      
      int nSimHits = 0;
      histoProducerAlgo_->fill_recoAssociated_simTrack_histos(w,*tp,momentumTP,vertexTP,dxyGen,dzGen,nSimHits,matchedTrackPointer,puinfo.getPU_NumInteractions());
      
      sts++;
      if (matchedTrackPointer) asts++;
      
      
      
      
    } // End  for (GenParticleCollection::size_type i=0; i<tPCeff.size(); i++){
    
    if(doSimPlots_ && w == 0) {
      histoProducerAlgo_->fill_simTrackBased_histos(st);
    }
    
    
      // ##############################################
      // fill recoTracks histograms (LOOP OVER TRACKS)
      // ##############################################
    if(!doRecoTrackPlots_)
      continue;
    edm::LogVerbatim("TrackValidator") << "\n# of reco::Tracks with "
                                       << label[www].process()<<":"
                                       << label[www].label()<<":"
                                       << label[www].instance()
                                       << ": " << trackCollection->size() << "\n";
    
    //int sat(0); //This counter counts the number of recoTracks that are associated to GenTracks from Signal only
    int at(0); //This counter counts the number of recoTracks that are associated to GenTracks
    int rT(0); //This counter counts the number of recoTracks in general
    
    for(View<Track>::size_type i=0; i<trackCollection->size(); ++i){
      
      RefToBase<Track> track(trackCollection, i);
      rT++;
      
      bool isSigGenMatched(false);
      bool isGenMatched(false);
      bool isChargeMatched(true);
      int numAssocRecoTracks = 0;
      int nSimHits = 0;
      double sharedFraction = 0.;
      std::vector<std::pair<GenParticleRef, double> > tp;
      if(recGenColl.find(track) != recGenColl.end()){
        tp = recGenColl[track];
        if (tp.size()!=0) {
          /*
        std::vector<PSimHit> simhits=tp[0].first->trackPSimHit(DetId::Tracker);
            nSimHits = simhits.end()-simhits.begin();
          */
          sharedFraction = tp[0].second;
          isGenMatched = true;
          if (tp[0].first->charge() != track->charge()) isChargeMatched = false;
          if(genRecColl.find(tp[0].first) != genRecColl.end()) numAssocRecoTracks = genRecColl[tp[0].first].size();
          //std::cout << numAssocRecoTracks << std::endl;
          at++;
          for (unsigned int tp_ite=0;tp_ite<tp.size();++tp_ite){ 
            GenParticle trackpart = *(tp[tp_ite].first);
            /*
          if ((trackpart.eventId().event() == 0) && (trackpart.eventId().bunchCrossing() == 0)){
              isSigGenMatched = true;
              sat++;
              break;
          }
            */
          }
          edm::LogVerbatim("TrackValidator") << "reco::Track #" << rT << " with pt=" << track->pt() 
                                             << " associated with quality:" << tp.begin()->second <<"\n";
        }
      } else {
        edm::LogVerbatim("TrackValidator") << "reco::Track #" << rT << " with pt=" << track->pt()
                                           << " NOT associated to any GenParticle" << "\n";       
      }
      
      
      double dR=0;//fixme: plots vs dR not implemented for now
      histoProducerAlgo_->fill_generic_recoTrack_histos(w,*track,bs.position(), nullptr, isGenMatched,isSigGenMatched, isChargeMatched, numAssocRecoTracks, puinfo.getPU_NumInteractions(), nSimHits, sharedFraction,dR);
      
      // dE/dx
      if (dodEdxPlots_) histoProducerAlgo_->fill_dedx_recoTrack_histos(w,track, v_dEdx);
      
      
      //Fill other histos
      //try{ //Is this really necessary ????
      
      if (tp.size()==0) continue;   
      
      histoProducerAlgo_->fill_simAssociated_recoTrack_histos(w,*track);
      
      GenParticleRef tpr = tp.begin()->first;
      
      /* TO BE FIXED LATER
         if (associators[ww]=="TrackAssociatorByChi2"){
         //association chi2
         double assocChi2 = -tp.begin()->second;//in association map is stored -chi2
         h_assochi2[www]->Fill(assocChi2);
         h_assochi2_prob[www]->Fill(TMath::Prob((assocChi2)*5,5));
         }
         else if (associators[ww]=="quickTrackAssociatorByHits"){
         double fraction = tp.begin()->second;
         h_assocFraction[www]->Fill(fraction);
         h_assocSharedHit[www]->Fill(fraction*track->numberOfValidHits());
    }
      */
      
      
      //Get tracking particle parameters at point of closest approach to the beamline
      TrackingParticle::Vector momentumTP = parametersDefinerTP->momentum(event,setup,*(tpr.get()));
      TrackingParticle::Point vertexTP = parametersDefinerTP->vertex(event,setup,*(tpr.get()));          
      int chargeTP = tpr->charge();
      
      histoProducerAlgo_->fill_ResoAndPull_recoTrack_histos(w,momentumTP,vertexTP,chargeTP,
                                                            *track,bs.position());
      
      
      //TO BE FIXED
      //std::vector<PSimHit> simhits=tpr.get()->trackPSimHit(DetId::Tracker);
      //nrecHit_vs_nsimHit_rec2sim[w]->Fill(track->numberOfValidHits(), (int)(simhits.end()-simhits.begin() ));
      
      /*
        } // End of try{
        catch (cms::Exception e){
        LogTrace("TrackValidator") << "exception found: " << e.what() << "\n";
        }
      */
      
    } // End of for(View<Track>::size_type i=0; i<trackCollection->size(); ++i){
    
    histoProducerAlgo_->fill_trackBased_histos(w,at,rT,st);
    
    edm::LogVerbatim("TrackValidator") << "Total Simulated: " << st << "\n"
                                       << "Total Associated (genToReco): " << ats << "\n"
                                       << "Total Reconstructed: " << rT << "\n"
                                       << "Total Associated (recoToGen): " << at << "\n"
                                       << "Total Fakes: " << rT-at << "\n";
    
    w++;
  } // End of  for (unsigned int www=0;www<label.size();www++){
}