EtaPhiMeasurementEstimator Class Reference

#include <EtaPhiMeasurementEstimator.h>

Inheritance diagram for EtaPhiMeasurementEstimator:

Public Member Functions
EtaPhiMeasurementEstimator *	clone () const
std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const
virtual bool	estimate (const TrajectoryStateOnSurface &tsos, const Plane &plane) const
	EtaPhiMeasurementEstimator (float dEta, float dPhi)
virtual Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &tsos, const Plane &plane) const
	~EtaPhiMeasurementEstimator ()
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 ( float  dEta, float  dPhi  )

inlineexplicit

Definition at line 18 of file EtaPhiMeasurementEstimator.h.

Referenced by clone().

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

EtaPhiMeasurementEstimator::~EtaPhiMeasurementEstimator ( )

inline

Definition at line 22 of file EtaPhiMeasurementEstimator.h.

References estimate(), and maximalLocalDisplacement().

{}

Member Function Documentation

EtaPhiMeasurementEstimator* EtaPhiMeasurementEstimator::clone ( void  ) const

inlinevirtual

Implements MeasurementEstimator.

Definition at line 33 of file EtaPhiMeasurementEstimator.h.

References EtaPhiMeasurementEstimator().

                                            {
    return new EtaPhiMeasurementEstimator(*this);
  }

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

virtual

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 10 of file EtaPhiMeasurementEstimator.cc.

Referenced by ~EtaPhiMeasurementEstimator().

                                                        {

  // 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);

  */

}

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

virtual

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

Implements MeasurementEstimator.

Definition at line 34 of file EtaPhiMeasurementEstimator.cc.

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

                                             {

  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);
}

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

virtual

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 50 of file EtaPhiMeasurementEstimator.cc.

Referenced by ~EtaPhiMeasurementEstimator().

                                              {

  return  Local2DVector(30., 30.);
}

Member Data Documentation

float EtaPhiMeasurementEstimator::thedEta

private

Definition at line 37 of file EtaPhiMeasurementEstimator.h.

Referenced by estimate().

float EtaPhiMeasurementEstimator::thedPhi

private

Definition at line 38 of file EtaPhiMeasurementEstimator.h.

Referenced by estimate().