EtaPhiMeasurementEstimator Class Reference

#include <EtaPhiMeasurementEstimator.h>

Inheritance diagram for EtaPhiMeasurementEstimator:

Public Member Functions
EtaPhiMeasurementEstimator *	clone () const override
std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const override
bool	estimate (const TrajectoryStateOnSurface &tsos, const Plane &plane) const override
	EtaPhiMeasurementEstimator (float dEta, float dPhi)
Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &tsos, const Plane &plane) const override
	~EtaPhiMeasurementEstimator () override
Public Member Functions inherited from MeasurementEstimator
float	maxSagitta () const
	MeasurementEstimator ()
	MeasurementEstimator (float maxSag, float minToll, float mpt)
float	minPt2ForHitRecoveryInGluedDet () const
float	minTolerance2 () const
virtual bool	preFilter (const TrajectoryStateOnSurface &, OpaquePayload const &) const
virtual	~MeasurementEstimator ()

Private Attributes
float	thedEta
float	thedPhi

Additional Inherited Members
Public Types inherited from MeasurementEstimator
using	HitReturnType = std::pair< bool, double >
using	Local2DVector = Vector2DBase< float, LocalTag >
using	SurfaceReturnType = bool

Detailed Description

A EtaPhi Measurement Estimator. Computhes the Chi^2 of a TrajectoryState with a RecHit or a Plane. The TrajectoryState must have errors. Works for any RecHit dimension. Ported from ORCA.

tschudi

Definition at line 15 of file EtaPhiMeasurementEstimator.h.

Constructor & Destructor Documentation

EtaPhiMeasurementEstimator()

EtaPhiMeasurementEstimator::EtaPhiMeasurementEstimator ( float  dEta, float  dPhi  )

inlineexplicit

Definition at line 17 of file EtaPhiMeasurementEstimator.h.

: thedEta(dEta), thedPhi(dPhi) {}

Referenced by clone().

~EtaPhiMeasurementEstimator()

EtaPhiMeasurementEstimator::~EtaPhiMeasurementEstimator ( )

inlineoverride

Definition at line 18 of file EtaPhiMeasurementEstimator.h.

{}

Member Function Documentation

clone()

EtaPhiMeasurementEstimator* EtaPhiMeasurementEstimator::clone ( void  ) const

inlineoverridevirtual

Implements MeasurementEstimator.

Definition at line 26 of file EtaPhiMeasurementEstimator.h.

{ return new EtaPhiMeasurementEstimator(*this); }

References EtaPhiMeasurementEstimator().

estimate() [1/2]

std::pair< bool, double > EtaPhiMeasurementEstimator::estimate ( const TrajectoryStateOnSurface &  ts, const TrackingRecHit &  hit  ) const

overridevirtual

Returns pair( true, value) if the TrajectoryStateOnSurface is compatible with the RecHit, and pair( false, value) if it is not compatible. The TrajectoryStateOnSurface must be on the same Surface as the RecHit. For an estimator where there is no value computed, e.g. fixed window estimator, only the first(bool) part is of interest.

Implements MeasurementEstimator.

Definition at line 9 of file EtaPhiMeasurementEstimator.cc.

                                                                                                  {
  // As the center of the plane is in the region, no need to waste time to test the hit as well
  return std::make_pair(true, 1.0);
 
  /* HERE AS THE SECOND LINE WAS BUGGY... (AND MAY BE NEEDED IF WE MODIFY THE ESTIMATE WRT PLANE TO ACCOUNT FOR DET SPAN
 
  auto dEta = std::abs(tsos.globalPosition().eta() - aRecHit.globalPosition().eta());
  auto dPhi = std::abs(deltaPhi(tsos.globalPosition().barePhi(), aRecHit.globalPosition().barePhi()));
 
  LogDebug("EtaPhiMeasurementEstimator")<< " The state to compare with is \n"<< tsos
                    << " The hit position is:\n" << aRecHit.globalPosition()
                    << " deta: "<< dEta<< " dPhi: "<<dPhi;
 
  if ( (dEta < thedEta) & (dPhi <thedPhi) )
    return std::make_pair(true, 1.0);
  else
    return std::make_pair(false, 0.0);
 
  */
}

estimate() [2/2]

bool EtaPhiMeasurementEstimator::estimate ( const TrajectoryStateOnSurface &  ts, const Plane &  plane  ) const

overridevirtual

Returns true if the TrajectoryStateOnSurface is compatible with the Plane, false otherwise. The TrajectoryStateOnSurface must be on the plane.

Implements MeasurementEstimator.

Definition at line 31 of file EtaPhiMeasurementEstimator.cc.

                                                                                                        {
  auto dEta = std::abs(tsos.globalPosition().eta() - plane.eta());
  auto dPhi = std::abs(deltaPhi(tsos.globalPosition().barePhi(), plane.phi()));
 
  LogDebug("EtaPhiMeasurementEstimator") << "The state to compare with is \n"
                                         << tsos << "\n"
                                         << "The plane position center is: " << plane.position() << "\n"
                                         << "the deta = " << thedEta << " --- the dPhi = " << thedPhi << "\n"
                                         << "deta = " << fabs(dEta) << " --- dPhi = " << fabs(dPhi);
 
  // does not take into account bounds... (not sure it was intentional)
  return (dEta < thedEta) & (dPhi < thedPhi);
}

References funct::abs(), PV3DBase< T, PVType, FrameType >::barePhi(), SiPixelRawToDigiRegional_cfi::deltaPhi, HLT_FULL_cff::dEta, HLT_FULL_cff::dPhi, GloballyPositioned< T >::eta(), PV3DBase< T, PVType, FrameType >::eta(), TrajectoryStateOnSurface::globalPosition(), LogDebug, GloballyPositioned< T >::phi(), GloballyPositioned< T >::position(), thedEta, and thedPhi.

maximalLocalDisplacement()

MeasurementEstimator::Local2DVector EtaPhiMeasurementEstimator::maximalLocalDisplacement ( const TrajectoryStateOnSurface &  ts, const Plane &  plane  ) const

overridevirtual

Returns the size of the compatibility region around the local position of the TrajectoryStateOnSurface along the directions of local x and y axis. The TrajectoryStateOnSurface must be on the plane. This method allows to limit the search for compatible detectors or RecHits. The MeasurementEstimator should not return "true" for any RecHit or Plane which is entirely outside of the compatibility region defined by maximalLocalDisplacement().

Implements MeasurementEstimator.

Definition at line 45 of file EtaPhiMeasurementEstimator.cc.

                                                                    {
  return Local2DVector(30., 30.);
}

Member Data Documentation

thedEta

float EtaPhiMeasurementEstimator::thedEta

private

Definition at line 29 of file EtaPhiMeasurementEstimator.h.

Referenced by estimate().

thedPhi

float EtaPhiMeasurementEstimator::thedPhi

private

Definition at line 30 of file EtaPhiMeasurementEstimator.h.

Referenced by estimate().