HitPixelLayersTPSelector.h

Go to the documentation of this file.

#ifndef HitPixelLayersTrackSelection_h
#define HitPixelLayersTrackSelection_h

#include "SimDataFormats/TrackingAnalysis/interface/TrackingParticle.h"
#include "SimDataFormats/TrackingAnalysis/interface/TrackingParticleFwd.h"

#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "DataFormats/TrackerCommon/interface/TrackerTopology.h"
#include "Geometry/Records/interface/IdealGeometryRecord.h"

class HitPixelLayersTPSelector
{

 public:
  // input collection type
  typedef TrackingParticleCollection collection;


  // output collection type
  typedef std::vector<const TrackingParticle*> container;

  // iterator over result collection type.
  typedef container::const_iterator const_iterator;

  // constructor from parameter set configurability
  HitPixelLayersTPSelector(const edm::ParameterSet & iConfig, edm::ConsumesCollector && iC) :
    tripletSeedOnly_(iConfig.getParameter<bool>("tripletSeedOnly")),
    ptMin_(iConfig.getParameter<double>("ptMin")),
    minRapidity_(iConfig.getParameter<double>("minRapidity")),
    maxRapidity_(iConfig.getParameter<double>("maxRapidity")),
    tip_(iConfig.getParameter<double>("tip")),
    lip_(iConfig.getParameter<double>("lip")),
    minHit_(iConfig.getParameter<int>("minHit")),
    signalOnly_(iConfig.getParameter<bool>("signalOnly")),
    chargedOnly_(iConfig.getParameter<bool>("chargedOnly")),
    primaryOnly_(iConfig.getParameter<bool>("primaryOnly")),
    tpStatusBased_(iConfig.getParameter<bool>("tpStatusBased")),
    pdgId_(iConfig.getParameter< std::vector<int> >("pdgId"))
      {};

    // select object from a collection and
    // possibly event content
    void select( const edm::Handle<collection> & TPCH, const edm::Event & iEvent, const edm::EventSetup & iSetup)
    {
      selected_.clear();
      //Retrieve tracker topology from geometry
      edm::ESHandle<TrackerTopology> tTopoHand;
      iSetup.get<IdealGeometryRecord>().get(tTopoHand);
      const TrackerTopology *tTopo=tTopoHand.product();


      const collection & tpc = *(TPCH.product());

      for (TrackingParticleCollection::size_type i=0; i<tpc.size(); i++)
    {
      TrackingParticleRef tpr(TPCH, i);

      // quickly reject if it is from pile-up
      if (signalOnly_ && !(tpr->eventId().bunchCrossing()==0 && tpr->eventId().event()==0) ) continue;
      if (chargedOnly_ && tpr->charge()==0) continue; //select only if charge!=0
      if (tpStatusBased_ && primaryOnly_ && tpr->status()!=1 ) continue; // TP status based sel primary
      if ((!tpStatusBased_) && primaryOnly_ && tpr->parentVertex()->nSourceTracks()!=0 ) continue; // vertex based sel for primary

      // loop over specified PID values
      bool testId = false;
      unsigned int idSize = pdgId_.size();
      if (idSize==0) testId = true;
      else for (unsigned int it=0;it!=idSize;++it){
        if (tpr->pdgId()==pdgId_[it]) testId = true;
      }

      // selection criteria
      if ( tpr->numberOfTrackerLayers() >= minHit_ &&
           sqrt(tpr->momentum().perp2()) >= ptMin_ &&
           tpr->momentum().eta() >= minRapidity_ && tpr->momentum().eta() <= maxRapidity_ &&
           sqrt(tpr->vertex().perp2()) <= tip_ &&
           fabs(tpr->vertex().z()) <= lip_ &&
           testId)
        {
          if (tripletSeedOnly_ && !goodHitPattern(pixelHitPattern(tpr,tTopo)) ) continue; //findable triplet seed
          const TrackingParticle * trap = &(tpc[i]);
          selected_.push_back(trap);
        }

    }
    }

    // return pixel layer hit pattern
    std::vector<bool> pixelHitPattern( const TrackingParticleRef& simTrack, const TrackerTopology *tTopo )
      {
    std::vector<bool> hitpattern(5,false); // PXB 0,1,2  PXF 0,1
    // This currently will always return false, since we can no loger use the sim hits to check for triplets.  This would need to be fixed if we want to enable this feature, but it's not being used at the moment, since tripletSeedOnly is always set to False  - Matt Nguyen, 24/7/2013

    return hitpattern;
      }

    // test whether hit pattern would give a pixel triplet seed
    bool goodHitPattern( const std::vector<bool>& hitpattern )
    {
      if( (hitpattern[0] && hitpattern[1] && hitpattern[2]) ||
      (hitpattern[0] && hitpattern[1] && hitpattern[3]) ||
      (hitpattern[0] && hitpattern[3] && hitpattern[4]) )
    return true;
      else
    return false;
    }

    // iterators over selected objects: collection begin
    const_iterator begin() const
    {
      return selected_.begin();
    }

    // iterators over selected objects: collection end
    const_iterator end() const
    {
      return selected_.end();
    }

    // true if no object has been selected
    size_t size() const
    {
      return selected_.size();
    }

    //private:

    container selected_;
    bool tripletSeedOnly_;
    double ptMin_;
    double minRapidity_;
    double maxRapidity_;
    double tip_;
    double lip_;
    int    minHit_;
    bool signalOnly_;
    bool chargedOnly_;
    bool primaryOnly_;
    bool tpStatusBased_;
    std::vector<int> pdgId_;


};


#endif