CSCOverlapsTrackPreparation Class Reference

#include <Alignment/CSCOverlapsTrackPreparation/src/CSCOverlapsTrackPreparation.cc>

Inheritance diagram for CSCOverlapsTrackPreparation:

List of all members.

Public Member Functions
	CSCOverlapsTrackPreparation (const edm::ParameterSet &)
	~CSCOverlapsTrackPreparation ()
Private Types
enum	{ kNothing, kSimpleFit, kAllButOne, kExtrapolate }
Private Member Functions
virtual void	beginJob ()
virtual void	endJob ()
virtual void	produce (edm::Event &, const edm::EventSetup &)
Private Attributes
edm::InputTag	m_src

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Detailed Description

Description: <one line="" class="" summary>="">

Implementation: <Notes on="" implementation>="">

Definition at line 62 of file CSCOverlapsTrackPreparation.cc.

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Member Enumeration Documentation

anonymous enum [private]

Enumerator:

kNothing
kSimpleFit
kAllButOne
kExtrapolate

Definition at line 68 of file CSCOverlapsTrackPreparation.cc.

{kNothing, kSimpleFit, kAllButOne, kExtrapolate};

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Constructor & Destructor Documentation

CSCOverlapsTrackPreparation::CSCOverlapsTrackPreparation

(

const edm::ParameterSet &

iConfig

)

[explicit]

Definition at line 89 of file CSCOverlapsTrackPreparation.cc.

   : m_src(iConfig.getParameter<edm::InputTag>("src"))
{
   produces<std::vector<Trajectory> >();
   produces<TrajTrackAssociationCollection>();
}

CSCOverlapsTrackPreparation::~CSCOverlapsTrackPreparation

(

)

Definition at line 97 of file CSCOverlapsTrackPreparation.cc.

{
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)
}

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Member Function Documentation

void CSCOverlapsTrackPreparation::beginJob

(

void

)

[private, virtual]

Reimplemented from edm::EDProducer.

Definition at line 208 of file CSCOverlapsTrackPreparation.cc.

{}

void CSCOverlapsTrackPreparation::endJob

(

void

)

[private, virtual]

Reimplemented from edm::EDProducer.

Definition at line 211 of file CSCOverlapsTrackPreparation.cc.

{}

void CSCOverlapsTrackPreparation::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)		[private, virtual]

Implements edm::EDProducer.

Definition at line 110 of file CSCOverlapsTrackPreparation.cc.

References alongMomentum, edm::OwnVector< T, P >::begin(), MuonTransientTrackingRecHitBuilder::build(), MuonSubdetId::CSC, edm::OwnVector< T, P >::end(), edm::EventSetup::get(), edm::Event::getByLabel(), m_src, DetId::Muon, TrajectoryStateTransform::persistentState(), Trajectory::push(), edm::OwnVector< T, P >::push_back(), edm::Event::put(), edm::OwnVector< T, P >::size(), and testEve_cfg::tracks.

                                                                                  {
  edm::Handle<reco::TrackCollection> tracks;
  iEvent.getByLabel(m_src, tracks);

  edm::ESHandle<CSCGeometry> cscGeometry;
  iSetup.get<MuonGeometryRecord>().get(cscGeometry);

  edm::ESHandle<MagneticField> magneticField;
  iSetup.get<IdealMagneticFieldRecord>().get(magneticField);

  edm::ESHandle<GlobalTrackingGeometry> globalGeometry;
  iSetup.get<GlobalTrackingGeometryRecord>().get(globalGeometry);

  TrajectoryStateTransform transformer;
  MuonTransientTrackingRecHitBuilder muonTransBuilder;

  // Create a collection of Trajectories, to put in the Event
  std::auto_ptr<std::vector<Trajectory> > trajectoryCollection(new std::vector<Trajectory>);

  // Remember which trajectory is associated with which track
  std::map<edm::Ref<std::vector<Trajectory> >::key_type, edm::Ref<reco::TrackCollection>::key_type> reference_map;
  edm::Ref<std::vector<Trajectory> >::key_type trajCounter = 0;
  edm::Ref<reco::TrackCollection>::key_type trackCounter = 0;

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

    // now we'll actually put hits on the new trajectory
    // these must be in lock-step
    edm::OwnVector<TrackingRecHit> clonedHits;
    std::vector<TrajectoryMeasurement::ConstRecHitPointer> transHits;
    std::vector<TrajectoryStateOnSurface> TSOSes;

    for (trackingRecHit_iterator hit = track->recHitsBegin();  hit != track->recHitsEnd();  ++hit) {
      DetId id = (*hit)->geographicalId();
      if (id.det() == DetId::Muon  &&  id.subdetId() == MuonSubdetId::CSC) {
        const Surface &layerSurface = cscGeometry->idToDet(id)->surface();
        TrajectoryMeasurement::ConstRecHitPointer hitPtr(muonTransBuilder.build(&**hit, globalGeometry));

        AlgebraicVector params(5);   // meaningless, CSCOverlapsAlignmentAlgorithm does the fit internally
        params[0] = 1.;  // straight-forward direction
        params[1] = 0.;
        params[2] = 0.;
        params[3] = 0.;  // center of the chamber
        params[4] = 0.;
        LocalTrajectoryParameters localTrajectoryParameters(params, 1., false);
        LocalTrajectoryError localTrajectoryError(0.001, 0.001, 0.001, 0.001, 0.001);

        // these must be in lock-step
        clonedHits.push_back((*hit)->clone());
        transHits.push_back(hitPtr);
        TSOSes.push_back(TrajectoryStateOnSurface(localTrajectoryParameters, localTrajectoryError, layerSurface, &*magneticField));
      } // end if CSC
    } // end loop over hits

    assert(clonedHits.size() == transHits.size());
    assert(transHits.size() == TSOSes.size());

    // build the trajectory
    if (clonedHits.size() > 0) {
      PTrajectoryStateOnDet *PTraj = transformer.persistentState(*(TSOSes.begin()), clonedHits.begin()->geographicalId().rawId());
      TrajectorySeed trajectorySeed(*PTraj, clonedHits, alongMomentum);
      Trajectory trajectory(trajectorySeed, alongMomentum);

      edm::OwnVector<TrackingRecHit>::const_iterator clonedHit = clonedHits.begin();
      std::vector<TrajectoryMeasurement::ConstRecHitPointer>::const_iterator transHitPtr = transHits.begin();
      std::vector<TrajectoryStateOnSurface>::const_iterator TSOS = TSOSes.begin();
      for (;  clonedHit != clonedHits.end();  ++clonedHit, ++transHitPtr, ++TSOS) {
        trajectory.push(TrajectoryMeasurement(*TSOS, *TSOS, *TSOS, (*transHitPtr)));
      }

      trajectoryCollection->push_back(trajectory);

      // Remember which Trajectory is associated with which Track
      trajCounter++;
      reference_map[trajCounter] = trackCounter;

    } // end if there are any clonedHits/TSOSes to work with
  } // end loop over tracks

  unsigned int numTrajectories = trajectoryCollection->size();

  // insert the trajectories into the Event
  edm::OrphanHandle<std::vector<Trajectory> > ohTrajs = iEvent.put(trajectoryCollection);

  // create the trajectory <-> track association map
  std::auto_ptr<TrajTrackAssociationCollection> trajTrackMap(new TrajTrackAssociationCollection());

  for (trajCounter = 0;  trajCounter < numTrajectories;  trajCounter++) {
    edm::Ref<reco::TrackCollection>::key_type trackCounter = reference_map[trajCounter];

    trajTrackMap->insert(edm::Ref<std::vector<Trajectory> >(ohTrajs, trajCounter), edm::Ref<reco::TrackCollection>(tracks, trackCounter));
  }
  // and put it in the Event, also
  iEvent.put(trajTrackMap);
}

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Member Data Documentation

edm::InputTag CSCOverlapsTrackPreparation::m_src [private]

Definition at line 75 of file CSCOverlapsTrackPreparation.cc.

Referenced by produce().