MuonR4::SegmentQualitySorter Struct Reference

Auxiliary class to rank segments by quality: more precision hits first, then more phi layers, more trigger eta layers, lower chi2/nDoF (NaN last) and finally the container index for a stable order. More...

#include <TrackingHelpers.h>

Collaboration diagram for MuonR4::SegmentQualitySorter:

Public Member Functions
bool	operator() (const xAOD::MuonSegment *a, const xAOD::MuonSegment *b) const

Detailed Description

Auxiliary class to rank segments by quality: more precision hits first, then more phi layers, more trigger eta layers, lower chi2/nDoF (NaN last) and finally the container index for a stable order.

Definition at line 72 of file TrackingHelpers.h.

Member Function Documentation

operator()()

bool MuonR4::SegmentQualitySorter::operator()	(	const xAOD::MuonSegment *	a,
		const xAOD::MuonSegment *	b ) const

Definition at line 136 of file TrackingHelpers.cxx.

                                                                          {
        if (a->nPrecisionHits() != b->nPrecisionHits()) {
            return a->nPrecisionHits() > b->nPrecisionHits();
        }
        if (a->nPhiLayers() != b->nPhiLayers()) {
            return a->nPhiLayers() > b->nPhiLayers();
        }
        if (a->nTrigEtaLayers() != b->nTrigEtaLayers()) {
            return a->nTrigEtaLayers() > b->nTrigEtaLayers();
        }
        const float chi2A = a->chiSquared() / std::max(1.f, a->numberDoF());
        const float chi2B = b->chiSquared() / std::max(1.f, b->numberDoF());
        if (std::isnan(chi2A) != std::isnan(chi2B)) {
            return std::isnan(chi2B);
        }
        if (chi2A != chi2B && !std::isnan(chi2A)) {
            return chi2A < chi2B;
        }
        return a->index() < b->index();
    }

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The documentation for this struct was generated from the following files:

• TrackingHelpers.h
• TrackingHelpers.cxx