reco::PFTrack Class Reference

Base class for particle flow input reconstructed tracks and simulated particles. More...

#include <PFTrack.h>

Inheritance diagram for reco::PFTrack:

Public Member Functions
void	addPoint (const reco::PFTrajectoryPoint &trajPt)
void	calculatePositionREP ()
double	charge () const
int	color () const
const reco::PFTrajectoryPoint &	extrapolatedPoint (unsigned layerid) const
std::vector< reco::PFTrajectoryPoint >::const_iterator	innermostMeasurement () const
	iterator on innermost tracker measurement More...
unsigned int	nTrajectoryMeasurements () const
unsigned int	nTrajectoryPoints () const
std::vector< reco::PFTrajectoryPoint >::const_iterator	outermostMeasurement () const
	iterator on outermost tracker measurement More...
	PFTrack ()
	PFTrack (const PFTrack &other)
	PFTrack (double charge)
void	setColor (int color)
void	setPoint (unsigned int index, const reco::PFTrajectoryPoint &measurement)
	set a trajectory point More...
const reco::PFTrajectoryPoint &	trajectoryPoint (unsigned index) const
const std::vector< reco::PFTrajectoryPoint > &	trajectoryPoints () const

Protected Attributes
double	charge_
	charge More...
int	color_
	color (transient) More...
unsigned int	indexInnermost_
	index innermost tracker measurement More...
unsigned int	indexOutermost_
	index outermost tracker measurement More...
std::vector< reco::PFTrajectoryPoint >	trajectoryPoints_
	vector of trajectory points More...

Static Protected Attributes
static const unsigned int	nMaxTrackingLayers_ = 17
	maximal number of tracking layers More...

Detailed Description

Base class for particle flow input reconstructed tracks and simulated particles.

A PFTrack contains a vector of PFTrajectoryPoint objects. These points are stored in a vector to benefit from the random access. One must take care of storing the points in the right order, and it might even be necessary to insert dummy points.

For a PFRecTrack, the ordering of the points is the following:

• point 1: Closest approach
• point 2: Beam Pipe
• point 3 to n: Trajectory measurements (from the tracker layers)
• point n+1: Preshower Layer 1, or dummy point if not in the preshower zone
• point n+2: Preshower Layer 2, or dummy point if not in the preshower zone
• point n+3: ECAL Entrance
• point n+4: ECAL expected position of the shower maximum, assuming the track is an electron track.
• point n+5: HCAL Entrance

For a PFSimParticle, the ordering of the points is the following.

• If the particle decays before ECAL:
• point 1: start point
• point 2: end point
• If the particle does not decay before ECAL:
• point 1: start point
• point 2: PS1 or dummy
• point 3: PS2 or dummy
• point 4: ECAL entrance
• point 5: HCAL entrance

PFRecTracks and PFSimParticles are created in the PFTrackProducer module.

Author

Renaud Bruneliere

Date

July 2006

Definition at line 63 of file PFTrack.h.

Constructor & Destructor Documentation

PFTrack() [1/3]

PFTrack::PFTrack

(

)

Definition at line 11 of file PFTrack.cc.

                 : charge_(0.), indexInnermost_(0), indexOutermost_(0), color_(1) {
  // prepare vector of trajectory points for propagated positions
  trajectoryPoints_.reserve(PFTrajectoryPoint::NLayers + nMaxTrackingLayers_);
}

References reco::PFTrajectoryPoint::NLayers, nMaxTrackingLayers_, and trajectoryPoints_.

PFTrack() [2/3]

PFTrack::PFTrack

(

double

charge

)

Definition at line 16 of file PFTrack.cc.

                              : charge_(charge), indexInnermost_(0), indexOutermost_(0), color_(1) {
  // prepare vector of trajectory points for propagated positions
  trajectoryPoints_.reserve(PFTrajectoryPoint::NLayers + nMaxTrackingLayers_);
}

References reco::PFTrajectoryPoint::NLayers, nMaxTrackingLayers_, and trajectoryPoints_.

PFTrack() [3/3]

PFTrack::PFTrack

(

const PFTrack &

other

)

Definition at line 21 of file PFTrack.cc.

    : charge_(other.charge_),
      trajectoryPoints_(other.trajectoryPoints_),
      indexInnermost_(other.indexInnermost_),
      indexOutermost_(other.indexOutermost_),
      color_(other.color_) {}

Member Function Documentation

addPoint()

void PFTrack::addPoint

(

const reco::PFTrajectoryPoint &

trajPt

)

add a trajectory measurement

Definition at line 28 of file PFTrack.cc.

                                                      {
  //   cout<<"adding "<<trajPt<<endl;
 
  if (trajPt.isTrackerLayer()) {
    if (!indexOutermost_) {  // first time a measurement is added
      if (trajectoryPoints_.size() < PFTrajectoryPoint::BeamPipeOrEndVertex + 1) {
        PFTrajectoryPoint dummyPt;
        for (unsigned iPt = trajectoryPoints_.size(); iPt < PFTrajectoryPoint::BeamPipeOrEndVertex + 1; iPt++)
          trajectoryPoints_.push_back(dummyPt);
      } else if (trajectoryPoints_.size() > PFTrajectoryPoint::BeamPipeOrEndVertex + 1) {
        // throw an exception here
        //      edm::LogError("PFTrack")<<"trajectoryPoints_.size() is too large = "
        //                              <<trajectoryPoints_.size()<<"\n";
      }
      indexOutermost_ = indexInnermost_ = PFTrajectoryPoint::BeamPipeOrEndVertex + 1;
    } else
      indexOutermost_++;
  }
  // Use push_back instead of insert in order to gain time
  trajectoryPoints_.push_back(trajPt);
 
  //   cout<<"adding point "<<*this<<endl;
}

References reco::PFTrajectoryPoint::BeamPipeOrEndVertex, indexInnermost_, indexOutermost_, reco::PFTrajectoryPoint::isTrackerLayer(), and trajectoryPoints_.

Referenced by PFTrackTransformer::addPoints(), and PFTrackTransformer::addPointsAndBrems().

calculatePositionREP()

void PFTrack::calculatePositionREP

(

)

calculate posrep_ once and for all for each point

Definition at line 52 of file PFTrack.cc.

                                   {
  //for(unsigned i=0; i<trajectoryPoints_.size(); i++) {
  //  trajectoryPoints_[i].calculatePositionREP();
  //}
}

Referenced by PFTrackTransformer::addPointsAndBrems(), reco::GsfPFRecTrack::calculateBremPositionREP(), and ConvBremPFTrackFinder::runConvBremFinder().

charge()

double reco::PFTrack::charge ( ) const

inline

Returns

electric charge

Definition at line 85 of file PFTrack.h.

{ return charge_; }

References charge_.

color()

int reco::PFTrack::color ( ) const

inline

Definition at line 117 of file PFTrack.h.

{ return color_; }

References color_.

Referenced by setColor().

extrapolatedPoint()

const reco::PFTrajectoryPoint & PFTrack::extrapolatedPoint

(

unsigned

layerid

)

const

Returns

an extrapolated point

Definition at line 58 of file PFTrack.cc.

                                                                              {
  const unsigned offset_layerid = nTrajectoryMeasurements() + layerid;
  if (layerid >= reco::PFTrajectoryPoint::NLayers || offset_layerid >= trajectoryPoints_.size()) {
    throw cms::Exception("SizeError") << "PFRecTrack::extrapolatedPoint: cannot access " << layerid
                                      << " #traj meas = " << nTrajectoryMeasurements()
                                      << " #traj points = " << trajectoryPoints_.size() << endl
                                      << (*this);
    // assert(0);
  }
  if (layerid < indexInnermost_)
    return trajectoryPoints_[layerid];
  else
    return trajectoryPoints_[offset_layerid];
}

References Exception, indexInnermost_, reco::PFTrajectoryPoint::NLayers, nTrajectoryMeasurements(), and trajectoryPoints_.

Referenced by PFElecTkProducer::isSharingEcalEnergyWithEgSC(), and ConvBremPFTrackFinder::runConvBremFinder().

innermostMeasurement()

std::vector<reco::PFTrajectoryPoint>::const_iterator reco::PFTrack::innermostMeasurement ( ) const

inline

iterator on innermost tracker measurement

Definition at line 106 of file PFTrack.h.

                                                                                {
      return trajectoryPoints_.begin() + indexInnermost_;
    }

References indexInnermost_, and trajectoryPoints_.

nTrajectoryMeasurements()

unsigned int reco::PFTrack::nTrajectoryMeasurements ( ) const

inline

Returns

number of trajectory measurements in tracker

Definition at line 91 of file PFTrack.h.

                                                 {
      return (indexOutermost_ ? indexOutermost_ - indexInnermost_ + 1 : 0);
    }

References indexInnermost_, and indexOutermost_.

Referenced by extrapolatedPoint().

nTrajectoryPoints()

unsigned int reco::PFTrack::nTrajectoryPoints ( ) const

inline

Returns

number of trajectory points

Definition at line 88 of file PFTrack.h.

{ return trajectoryPoints_.size(); }

References trajectoryPoints_.

outermostMeasurement()

std::vector<reco::PFTrajectoryPoint>::const_iterator reco::PFTrack::outermostMeasurement ( ) const

inline

iterator on outermost tracker measurement

Definition at line 111 of file PFTrack.h.

                                                                                {
      return trajectoryPoints_.begin() + indexOutermost_;
    }

References indexOutermost_, and trajectoryPoints_.

setColor()

void reco::PFTrack::setColor ( int  color )

inline

Definition at line 115 of file PFTrack.h.

{ color_ = color; }

References color(), and color_.

setPoint()

void reco::PFTrack::setPoint ( unsigned int  index, const reco::PFTrajectoryPoint &  measurement  )

inline

set a trajectory point

Definition at line 76 of file PFTrack.h.

                                                                                {
      trajectoryPoints_[index] = measurement;
    }

References trajectoryPoints_.

trajectoryPoint()

const reco::PFTrajectoryPoint& reco::PFTrack::trajectoryPoint ( unsigned  index ) const

inline

Returns

a trajectory point

Definition at line 99 of file PFTrack.h.

{ return trajectoryPoints_[index]; }

References trajectoryPoints_.

trajectoryPoints()

const std::vector<reco::PFTrajectoryPoint>& reco::PFTrack::trajectoryPoints ( ) const

inline

Returns

vector of trajectory points

Definition at line 96 of file PFTrack.h.

{ return trajectoryPoints_; }

References trajectoryPoints_.

Member Data Documentation

charge_

double reco::PFTrack::charge_

protected

charge

Definition at line 124 of file PFTrack.h.

Referenced by charge().

color_

int reco::PFTrack::color_

protected

color (transient)

Definition at line 136 of file PFTrack.h.

Referenced by color(), and setColor().

indexInnermost_

unsigned int reco::PFTrack::indexInnermost_

protected

index innermost tracker measurement

Definition at line 130 of file PFTrack.h.

Referenced by addPoint(), extrapolatedPoint(), innermostMeasurement(), and nTrajectoryMeasurements().

indexOutermost_

unsigned int reco::PFTrack::indexOutermost_

protected

index outermost tracker measurement

Definition at line 133 of file PFTrack.h.

Referenced by addPoint(), nTrajectoryMeasurements(), and outermostMeasurement().

nMaxTrackingLayers_

const unsigned PFTrack::nMaxTrackingLayers_ = 17

staticprotected

maximal number of tracking layers

Definition at line 121 of file PFTrack.h.

Referenced by PFTrack().

trajectoryPoints_

std::vector<reco::PFTrajectoryPoint> reco::PFTrack::trajectoryPoints_

protected

vector of trajectory points

Definition at line 127 of file PFTrack.h.

Referenced by addPoint(), extrapolatedPoint(), innermostMeasurement(), nTrajectoryPoints(), outermostMeasurement(), PFTrack(), setPoint(), trajectoryPoint(), and trajectoryPoints().