#include <Chi2MeasurementEstimator.h>

Inheritance diagram for Chi2MeasurementEstimator:

Public Member Functions
template<typename... Args>
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma, float maxDisp, Args &&... args)

	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3., float maxDisp=std::numeric_limits< float >::max())

Chi2MeasurementEstimator *	clone () const override

std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const override

Public Member Functions inherited from Chi2MeasurementEstimatorBase
template<typename... Args>
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma, float maxDisp, Args &&... args)

	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3., float maxDisp=std::numeric_limits< float >::max())

double	chiSquaredCut () const

bool	estimate (const TrajectoryStateOnSurface &ts, const Plane &plane) const final

Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &ts, const Plane &plane) const final

double	nSigmaCut () const

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 ()

Additional Inherited Members
Public Types inherited from MeasurementEstimator
using	HitReturnType = std::pair< bool, double >

using	Local2DVector = Vector2DBase< float, LocalTag >

using	SurfaceReturnType = bool

Protected Member Functions inherited from Chi2MeasurementEstimatorBase
std::pair< bool, double >	returnIt (double est) const

Detailed Description

A Chi2 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.

Author: todorov, cerati

Definition at line 15 of file Chi2MeasurementEstimator.h.

Member Function Documentation

◆ Chi2MeasurementEstimatorBase() [1/2]

template<typename... Args>

Chi2MeasurementEstimatorBase::Chi2MeasurementEstimatorBase ( typename... Args )

inline

Definition at line 27 of file Chi2MeasurementEstimatorBase.h.

28 : MeasurementEstimator(args...), theMaxChi2(maxChi2), theNSigma(nSigma), theMaxDisplacement(maxDisp) {}

◆ Chi2MeasurementEstimatorBase() [2/2]

Chi2MeasurementEstimatorBase::Chi2MeasurementEstimatorBase

inlineexplicit

Construct with cuts on chi2 and nSigma. The cut on Chi2 is used to define the acceptance of RecHits. The errors of the trajectory state are multiplied by nSigma to define acceptance of Plane and maximalLocalDisplacement.

Definition at line 21 of file Chi2MeasurementEstimatorBase.h.

24 : theMaxChi2(maxChi2), theNSigma(nSigma), theMaxDisplacement(maxDisp) {}

◆ clone()

Chi2MeasurementEstimator* Chi2MeasurementEstimator::clone ( void ) const

inlineoverridevirtual

Implements MeasurementEstimator.

Definition at line 21 of file Chi2MeasurementEstimator.h.

21 { return new Chi2MeasurementEstimator(*this); }

References Chi2MeasurementEstimator_cfi::Chi2MeasurementEstimator.

◆ estimate()

std::pair< bool, double > Chi2MeasurementEstimator::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 Chi2MeasurementEstimatorBase.

Definition at line 32 of file Chi2MeasurementEstimator.cc.

                                                                                                 {
   switch (aRecHit.dimension()) {
     case 1:
       return returnIt(lestimate<1>(tsos, aRecHit));
     case 2:
       return returnIt(lestimate<2>(tsos, aRecHit));
     case 3:
       return returnIt(lestimate<3>(tsos, aRecHit));
     case 4:
       return returnIt(lestimate<4>(tsos, aRecHit));
     case 5:
       return returnIt(lestimate<5>(tsos, aRecHit));
   }
   throw cms::Exception("RecHit of invalid size (not 1,2,3,4,5)");
 }

References TrackingRecHit::dimension(), Exception, and Chi2MeasurementEstimatorBase::returnIt().

Referenced by GsfChi2MeasurementEstimator::estimate(), and MuonChi2MeasurementEstimator::estimate().