ActsTrk::TrackParamsEstimationTool Class Reference

#include <TrackParamsEstimationTool.h>

Inheritance diagram for ActsTrk::TrackParamsEstimationTool:

Collaboration diagram for ActsTrk::TrackParamsEstimationTool:

Public Member Functions
	TrackParamsEstimationTool (const std::string &type, const std::string &name, const IInterface *parent)
virtual	~TrackParamsEstimationTool ()=default
virtual StatusCode	initialize () override
virtual std::pair< std::optional< Acts::BoundTrackParameters >, EstimationStatus >	estimateTrackParameters (const ActsTrk::Seed &seed, bool reverseSearch, const Acts::GeometryContext &geoContext, const Acts::MagneticFieldContext &magFieldContext, const Acts::CalibrationContext &calContext, std::function< const Acts::Surface &(const ActsTrk::Seed &seed, bool useTopSp)> retrieveSurface) const override
virtual std::pair< std::optional< Acts::BoundTrackParameters >, EstimationStatus >	estimateTrackParameters (const ActsTrk::Seed &seed, bool reverseSearch, const Acts::GeometryContext &geoContext, const Acts::MagneticFieldContext &magFieldContext, const Acts::CalibrationContext &calContext, const Acts::Surface &surface, const Acts::Vector3 &bField) const override
SpacePointIndicesFun_t	spacePointIndicesFun () const override
bool	estimateFromTopSp (bool reverseSearch) const override

Private Types
using	Stepper = Acts::SympyStepper
using	Navigator = Acts::VoidNavigator
using	Extrapolator = Acts::Propagator<Stepper>

Private Member Functions
std::optional< Acts::BoundTrackParameters >	doRefit (const ActsTrk::Seed &measurement, const Acts::BoundTrackParameters &initialParameters, const Acts::GeometryContext &geometry, const Acts::MagneticFieldContext &magField, const Acts::CalibrationContext &calib, const bool paramsAtOutermostSurface) const
const Acts::Logger &	logger () const
	Private access to the logger.

Private Attributes
ToolHandle< ActsTrk::IFitterTool >	m_fitterTool {this, "FitterTool", "", "Fitter Tool for Seeds"}
ServiceHandle< ActsTrk::ITrackingGeometrySvc >	m_trackingGeometrySvc {this, "TrackingGeometrySvc", "ActsTrackingGeometrySvc"}
Gaudi::Property< double >	m_sigmaLoc0
Gaudi::Property< double >	m_sigmaLoc1
Gaudi::Property< double >	m_sigmaPhi
Gaudi::Property< double >	m_sigmaTheta
Gaudi::Property< double >	m_sigmaQOverP
Gaudi::Property< double >	m_sigmaT0
Gaudi::Property< double >	m_initialSigmaPtRel
Gaudi::Property< std::vector< double > >	m_initialVarInflation
Gaudi::Property< int >	m_useLongSeeds
Gaudi::Property< int >	m_bFieldMode
Gaudi::Property< std::size_t >	m_firstSp
Gaudi::Property< bool >	m_allowPropagatorFailure
Gaudi::Property< std::size_t >	m_stripCalibrationIterations
Gaudi::Property< bool >	m_refitSeeds {this, "refitSeeds", false, "Run KalmanFitter on seeds"}
detail::xAODUncalibMeasSurfAcc	m_uncalibMeasSurfAcc {}
std::optional< Extrapolator >	m_extrapolator
std::unique_ptr< const Acts::Logger >	m_logger
	logging instance
SpacePointIndicesFun_t	m_spacePointIndicesFun {}

Detailed Description

Definition at line 23 of file TrackParamsEstimationTool.h.

Member Typedef Documentation

Extrapolator

using ActsTrk::TrackParamsEstimationTool::Extrapolator = Acts::Propagator<Stepper>

private

Definition at line 105 of file TrackParamsEstimationTool.h.

Navigator

using ActsTrk::TrackParamsEstimationTool::Navigator = Acts::VoidNavigator

private

Definition at line 104 of file TrackParamsEstimationTool.h.

Stepper

using ActsTrk::TrackParamsEstimationTool::Stepper = Acts::SympyStepper

private

Definition at line 103 of file TrackParamsEstimationTool.h.

Constructor & Destructor Documentation

TrackParamsEstimationTool()

ActsTrk::TrackParamsEstimationTool::TrackParamsEstimationTool	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent )

Definition at line 86 of file TrackParamsEstimationTool.cxx.

    : base_class(type, name, parent)  
  {}

~TrackParamsEstimationTool()

virtual ActsTrk::TrackParamsEstimationTool::~TrackParamsEstimationTool ( )

virtualdefault

Member Function Documentation

doRefit()

std::optional< Acts::BoundTrackParameters > ActsTrk::TrackParamsEstimationTool::doRefit ( const ActsTrk::Seed & measurement, const Acts::BoundTrackParameters & initialParameters, const Acts::GeometryContext & geometry, const Acts::MagneticFieldContext & magField, const Acts::CalibrationContext & calib, const bool paramsAtOutermostSurface ) const

private

Definition at line 290 of file TrackParamsEstimationTool.cxx.

                                                 {
    // Perform KF before CKF
    const Acts::Surface* targetSurface = nullptr;
    // get the proper surface
    if (not paramsAtOutermostSurface) {
      // inner-most surface
      targetSurface = m_uncalibMeasSurfAcc.get(measurement.sp().front()->measurements().front());
    } else {
      // outer-most surface
      targetSurface = m_uncalibMeasSurfAcc.get(measurement.sp().back()->measurements().back());
    }
    if (not targetSurface) {
      ATH_MSG_WARNING("Could not identify the target surface for fitting the provided seed");
      return std::nullopt;
    }
    const auto fittedSeedCollection = m_fitterTool->fit(measurement, initialParameters,
                                                        geometry, magField, calib,
                                                        *targetSurface);
    if (not fittedSeedCollection) {
      ATH_MSG_VERBOSE("KF fit failure");
      return std::nullopt;
    }
    if (fittedSeedCollection->size() != 1) {
      ATH_MSG_WARNING("KF produced " << fittedSeedCollection->size() << " tracks but should produce 1!");
      return std::nullopt;
    }
    const auto fittedSeed = fittedSeedCollection->getTrack(0);
 
    // get the track state at the beginning of the track, where we started
    std::optional<typename decltype(fittedSeed)::ConstTrackStateProxy> trackState {std::nullopt};
    if (paramsAtOutermostSurface) {
      trackState = fittedSeed.outermostTrackState();
    } else {
      trackState = fittedSeed.innermostTrackState();
      if (!trackState) {
        // if the track is not forward linked (fixed by #5666), then we need to search back to the innermost track state
        for (auto st : fittedSeed.trackStatesReversed()) {
          trackState = st;
        }
      }
    }
 
    if (!trackState) {
      ATH_MSG_VERBOSE("Missing "
                      << (paramsAtOutermostSurface ? "outermost" : "innermost")
                      << " track state");
      return std::nullopt;
    }
 
    // Return updated parameters
    return fittedSeed.createParametersFromState(trackState.value());
  };

estimateFromTopSp()

bool ActsTrk::TrackParamsEstimationTool::estimateFromTopSp ( bool reverseSearch ) const

inlineoverride

Definition at line 56 of file TrackParamsEstimationTool.h.

{ return reverseSearch && !m_refitSeeds; }

estimateTrackParameters() [1/2]

std::pair< std::optional< Acts::BoundTrackParameters >, TrackParamsEstimationTool::EstimationStatus > ActsTrk::TrackParamsEstimationTool::estimateTrackParameters ( const ActsTrk::Seed & seed, bool reverseSearch, const Acts::GeometryContext & geoContext, const Acts::MagneticFieldContext & magFieldContext, const Acts::CalibrationContext & calContext, const Acts::Surface & surface, const Acts::Vector3 & bField ) const

overridevirtual

Definition at line 164 of file TrackParamsEstimationTool.cxx.

  {
    bool useTopSp = estimateFromTopSp(reverseSearch);
 
    // Get SPs
    const auto& sp_collection = seed.sp();
    const std::size_t nSp = sp_collection.size();
    if (nSp < 3) return {std::nullopt, kNoSeedRefit};
 
    // Function to extract the values from sp_collection
    const auto sp_collection_extract = std::views::transform([&sp_collection, useTopSp](std::size_t i) {
      return sp_collection.at(useTopSp ? sp_collection.size() - i - 1 : i);
    });
 
    // Compute free parameters
    Acts::FreeVector freeParams = estimateTrackParamsFromSeed(m_spacePointIndicesFun(nSp) | sp_collection_extract, bField, m_stripCalibrationIterations);
 
    if (m_useLongSeeds == 1 && nSp > 3ul) {
      const auto spacePointIndicesFun2 = [](std::size_t nSp) -> std::array<std::size_t, 3> {
        return {0, nSp / 2ul, nSp - 1};
      };
      const Acts::FreeVector freeParams2 = estimateTrackParamsFromSeed(spacePointIndicesFun2(nSp) | sp_collection_extract, bField, m_stripCalibrationIterations);
      ATH_MSG_DEBUG("update seed p = " << 1.0 / freeParams[Acts::eFreeQOverP] << " to " << 1.0 / freeParams2[Acts::eFreeQOverP]);
      freeParams[Acts::eFreeQOverP] = freeParams2[Acts::eFreeQOverP];
    }
 
    if (useTopSp) {
      // reverse direction so momentum vector pointing outwards
      freeParams = Acts::reflectFreeParameters(freeParams);
    }
 
    // Convert free params to curvilinear params for extrapolation
    Acts::BoundTrackParameters curvilinearParams = Acts::BoundTrackParameters::createCurvilinear(
      freeParams.segment<4>(Acts::eFreePos0),
      freeParams.segment<3>(Acts::eFreeDir0),
      freeParams[Acts::eFreeQOverP],
      std::nullopt,
      Acts::ParticleHypothesis::pion());
 
    // Extrapolate to surface
    Acts::PropagatorPlainOptions propOptions(geoContext, magFieldContext);
    propOptions.direction = Acts::Direction::fromScalarZeroAsPositive(
        surface.intersect(
          geoContext,
          freeParams.segment<3>(Acts::eFreePos0),
          freeParams.segment<3>(Acts::eFreeDir0)
        ).closest().pathLength());
 
    std::optional<Acts::BoundTrackParameters> boundParams;
    auto boundParamsResult =
        m_extrapolator->propagateToSurface(curvilinearParams, surface, propOptions);
 
    if (!boundParamsResult.ok()) {
      ATH_MSG_DEBUG("Extrapolation from " << seed.sp().size() << "-SP seed (" << (useTopSp ? "top" : "bottom") << " start) failed - "
                    << (m_allowPropagatorFailure ? "use curvilinear parameters" : "skip seed"));
      if (m_allowPropagatorFailure) {
        // Fallback: use curvilinear parameters instead of failing
        boundParams = curvilinearParams;
      } else {
        return {std::nullopt, kNoSeedRefit};
      }
    } else {
      boundParams = *boundParamsResult;
    }
 
    // Estimate covariance
    Acts::EstimateTrackParamCovarianceConfig covarianceEstimationConfig = {
      .initialSigmas = {m_sigmaLoc0, m_sigmaLoc1, m_sigmaPhi, m_sigmaTheta, m_sigmaQOverP, m_sigmaT0},
      .initialSigmaPtRel = m_initialSigmaPtRel,
      .initialVarInflation = Eigen::Map<const Acts::BoundVector>(m_initialVarInflation.value().data()),
      .noTimeVarInflation = 1.0,
    };
    boundParams->covariance() = Acts::estimateTrackParamCovariance(
      covarianceEstimationConfig,
      boundParams->parameters(),
      false);
 
    if (!m_refitSeeds) {
      ATH_MSG_DEBUG("estimateTrackParams from " << seed.sp().size() << "-SP seed (" << (useTopSp ? "top" : "bottom") << " start) succeeded");
      return {boundParams, kNoSeedRefit};
    }
 
    auto refitResult = doRefit(seed, *boundParams, geoContext, magFieldContext, calContext, reverseSearch);
    ATH_MSG_DEBUG("Refit " << seed.sp().size() << "-SP seed (" << (reverseSearch ? "top" : "bottom") << " start) " << (refitResult ? "succeeded" : "failed"));
    if (refitResult) {
      return {refitResult, kSeedRefitSuccess};
    } else {
      return {boundParams, kSeedRefitFailed};
    }
 
  }

estimateTrackParameters() [2/2]

std::pair< std::optional< Acts::BoundTrackParameters >, TrackParamsEstimationTool::EstimationStatus > ActsTrk::TrackParamsEstimationTool::estimateTrackParameters ( const ActsTrk::Seed & seed, bool reverseSearch, const Acts::GeometryContext & geoContext, const Acts::MagneticFieldContext & magFieldContext, const Acts::CalibrationContext & calContext, std::function< const Acts::Surface &(const ActsTrk::Seed &seed, bool useTopSp)> retrieveSurface ) const

overridevirtual

Definition at line 126 of file TrackParamsEstimationTool.cxx.

  {
    bool useTopSp = estimateFromTopSp(reverseSearch);
 
    const auto& sp_collection = seed.sp();
    if ( sp_collection.size() < 3 ) return {std::nullopt, kNoSeedRefit};
    const xAOD::SpacePoint* bottom_sp = (useTopSp && m_bFieldMode != 2) ? sp_collection.back() : sp_collection.front();
 
    // Magnetic Field
    ATLASMagneticFieldWrapper magneticField;
    Acts::MagneticFieldProvider::Cache magFieldCache = magneticField.makeCache( magFieldContext );
    Acts::Vector3 bField = *magneticField.getField( Acts::Vector3(bottom_sp->x(), bottom_sp->y(), bottom_sp->z()),
                                                    magFieldCache );
    if (m_bFieldMode == 1) {
        bField[0] = 0.0;
        bField[1] = 0.0;
    }
 
    // Get the surface
    const Acts::Surface& surface = retrieveSurface(seed, useTopSp);
 
    return estimateTrackParameters(
                   seed,
                   reverseSearch,
                   geoContext,
                   magFieldContext,
                   calContext,
                   surface,
                   bField);
  }

initialize()

StatusCode ActsTrk::TrackParamsEstimationTool::initialize ( )

overridevirtual

Definition at line 92 of file TrackParamsEstimationTool.cxx.

  {
    ATH_MSG_INFO( "Initializing " << name() << "..." );
 
    ATH_MSG_DEBUG( "Properties Summary:" );
    ATH_MSG_DEBUG( "   " << m_sigmaLoc0 );
    ATH_MSG_DEBUG( "   " << m_sigmaLoc1 );
    ATH_MSG_DEBUG( "   " << m_sigmaPhi );
    ATH_MSG_DEBUG( "   " << m_sigmaTheta );
    ATH_MSG_DEBUG( "   " << m_sigmaQOverP );
    ATH_MSG_DEBUG( "   " << m_sigmaT0 );
    ATH_MSG_DEBUG( "   " << m_initialVarInflation );
    ATH_MSG_DEBUG( "   " << m_bFieldMode );
    ATH_MSG_DEBUG( "   " << m_firstSp );
    ATH_MSG_DEBUG( "   " << m_stripCalibrationIterations );
    ATH_MSG_DEBUG( "   " << m_refitSeeds );
 
    ATH_CHECK(m_fitterTool.retrieve(EnableTool{m_refitSeeds}));
 
    m_logger = makeActsAthenaLogger(this, "Acts");
 
    m_extrapolator = Extrapolator(Stepper(std::make_shared<ATLASMagneticFieldWrapper>()), Navigator(), logger().cloneWithSuffix("Prop"));
 
    m_spacePointIndicesFun = spacePointIndicesFun();
 
    if (m_refitSeeds) {
      ATH_CHECK(m_trackingGeometrySvc.retrieve());
      m_uncalibMeasSurfAcc = detail::xAODUncalibMeasSurfAcc {m_trackingGeometrySvc.get()};
    }
 
    return StatusCode::SUCCESS;
  }

logger()

const Acts::Logger & ActsTrk::TrackParamsEstimationTool::logger ( ) const

inlineprivate

Private access to the logger.

Definition at line 110 of file TrackParamsEstimationTool.h.

    {
      return *m_logger;
    }

spacePointIndicesFun()

ITrackParamsEstimationTool::SpacePointIndicesFun_t ActsTrk::TrackParamsEstimationTool::spacePointIndicesFun ( ) const

override

Definition at line 264 of file TrackParamsEstimationTool.cxx.

                                                                                                         {
    if (m_useLongSeeds == 2) {
      return [](std::size_t nSp) -> std::array<std::size_t, 3> {
        if (nSp > 3ul)
          return {0, nSp / 2ul, nSp - 1};
        else
          return {0, 1, 2};
      };
    } else if (m_firstSp > 0ul) {
      std::size_t firstSp = m_firstSp;
      return [firstSp](std::size_t nSp) -> std::array<std::size_t, 3> {
        if (nSp > 3ul) {
          std::size_t first = std::min(firstSp, nSp - 3ul);
          return {first, first + 1, first + 2};
        } else
          return {0, 1, 2};
      };
    } else {
      return [](std::size_t) -> std::array<std::size_t, 3> {
        return {0, 1, 2};
      };
    }
  };

Member Data Documentation

m_allowPropagatorFailure

Gaudi::Property<bool> ActsTrk::TrackParamsEstimationTool::m_allowPropagatorFailure

private

Initial value:

{this, "allowPropagatorFailure", false,
        "Use curvilinear parameters when propagation fails instead of returning null"}

Definition at line 87 of file TrackParamsEstimationTool.h.

                                                {this, "allowPropagatorFailure", false,
        "Use curvilinear parameters when propagation fails instead of returning null"};

m_bFieldMode

Gaudi::Property<int> ActsTrk::TrackParamsEstimationTool::m_bFieldMode

private

Initial value:

{this, "bFieldMode", 0,
        "B-field mode: 0=B-field at first SP in search order; 1=z-component of B-field; 2=B-field at innermost SP, regardless of search direction"}

Definition at line 83 of file TrackParamsEstimationTool.h.

                                   {this, "bFieldMode", 0,
        "B-field mode: 0=B-field at first SP in search order; 1=z-component of B-field; 2=B-field at innermost SP, regardless of search direction"};

m_extrapolator

std::optional<Extrapolator> ActsTrk::TrackParamsEstimationTool::m_extrapolator

private

Definition at line 107 of file TrackParamsEstimationTool.h.

m_firstSp

Gaudi::Property<std::size_t> ActsTrk::TrackParamsEstimationTool::m_firstSp

private

Initial value:

{this, "firstSp", 0ul,
        "Index of first SP to use"}

Definition at line 85 of file TrackParamsEstimationTool.h.

                                      {this, "firstSp", 0ul,
        "Index of first SP to use"};

m_fitterTool

ToolHandle<ActsTrk::IFitterTool> ActsTrk::TrackParamsEstimationTool::m_fitterTool {this, "FitterTool", "", "Fitter Tool for Seeds"}

private

Definition at line 61 of file TrackParamsEstimationTool.h.

{this, "FitterTool", "", "Fitter Tool for Seeds"};

m_initialSigmaPtRel

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_initialSigmaPtRel

private

Initial value:

{this, "initialSigmaPtRel", 0.1,
        "Initial relative pT resolution"}

Definition at line 77 of file TrackParamsEstimationTool.h.

                                                {this, "initialSigmaPtRel", 0.1,
        "Initial relative pT resolution"};

m_initialVarInflation

Gaudi::Property< std::vector<double> > ActsTrk::TrackParamsEstimationTool::m_initialVarInflation

private

Initial value:

{this, "initialVarInflation", {1., 1., 1., 1., 1., 1.},
        "Inflate tracks"}

Definition at line 79 of file TrackParamsEstimationTool.h.

                                                             {this, "initialVarInflation", {1., 1., 1., 1., 1., 1.},
        "Inflate tracks"};

m_logger

std::unique_ptr<const Acts::Logger> ActsTrk::TrackParamsEstimationTool::m_logger

private

logging instance

Definition at line 116 of file TrackParamsEstimationTool.h.

m_refitSeeds

Gaudi::Property<bool> ActsTrk::TrackParamsEstimationTool::m_refitSeeds {this, "refitSeeds", false, "Run KalmanFitter on seeds"}

private

Definition at line 91 of file TrackParamsEstimationTool.h.

{this, "refitSeeds", false, "Run KalmanFitter on seeds"};

m_sigmaLoc0

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaLoc0

private

Initial value:

{this, "sigmaLoc0", 1 * Acts::UnitConstants::mm,
        "Constant term of the loc0 resolution"}

Definition at line 65 of file TrackParamsEstimationTool.h.

                                        {this, "sigmaLoc0", 1 * Acts::UnitConstants::mm,
        "Constant term of the loc0 resolution"};

m_sigmaLoc1

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaLoc1

private

Initial value:

{this, "sigmaLoc1", 1 * Acts::UnitConstants::mm,
        "Constant term of the loc1 resolution"}

Definition at line 67 of file TrackParamsEstimationTool.h.

                                        {this, "sigmaLoc1", 1 * Acts::UnitConstants::mm,
        "Constant term of the loc1 resolution"};

m_sigmaPhi

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaPhi

private

Initial value:

{this, "sigmaPhi", 0.1 * Acts::UnitConstants::degree,
        "Phi angular resolution"}

Definition at line 69 of file TrackParamsEstimationTool.h.

                                       {this, "sigmaPhi", 0.1 * Acts::UnitConstants::degree,
        "Phi angular resolution"};

m_sigmaQOverP

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaQOverP

private

Initial value:

{this, "sigmaQOverP", 0.1 * Acts::UnitConstants::e / Acts::UnitConstants::GeV,
        "q/p resolution"}

Definition at line 73 of file TrackParamsEstimationTool.h.

                                          {this, "sigmaQOverP", 0.1 * Acts::UnitConstants::e / Acts::UnitConstants::GeV,
        "q/p resolution"};

m_sigmaT0

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaT0

private

Initial value:

{this, "sigmaT0", 1 * Acts::UnitConstants::ns,
        "Time resolution"}

Definition at line 75 of file TrackParamsEstimationTool.h.

                                      {this, "sigmaT0", 1 * Acts::UnitConstants::ns,
        "Time resolution"};

m_sigmaTheta

Gaudi::Property< double > ActsTrk::TrackParamsEstimationTool::m_sigmaTheta

private

Initial value:

{this, "sigmaTheta", 0.1 * Acts::UnitConstants::degree,
        "Theta angular resolution"}

Definition at line 71 of file TrackParamsEstimationTool.h.

                                         {this, "sigmaTheta", 0.1 * Acts::UnitConstants::degree,
        "Theta angular resolution"};

m_spacePointIndicesFun

SpacePointIndicesFun_t ActsTrk::TrackParamsEstimationTool::m_spacePointIndicesFun {}

private

Definition at line 118 of file TrackParamsEstimationTool.h.

{};

m_stripCalibrationIterations

Gaudi::Property<std::size_t> ActsTrk::TrackParamsEstimationTool::m_stripCalibrationIterations

private

Initial value:

{this, "stripCalibrationIterations", 1ul,
        "Number of strip calibration iterations"}

Definition at line 89 of file TrackParamsEstimationTool.h.

                                                         {this, "stripCalibrationIterations", 1ul,
        "Number of strip calibration iterations"};

m_trackingGeometrySvc

ServiceHandle<ActsTrk::ITrackingGeometrySvc> ActsTrk::TrackParamsEstimationTool::m_trackingGeometrySvc {this, "TrackingGeometrySvc", "ActsTrackingGeometrySvc"}

private

Definition at line 62 of file TrackParamsEstimationTool.h.

{this, "TrackingGeometrySvc", "ActsTrackingGeometrySvc"};

m_uncalibMeasSurfAcc

detail::xAODUncalibMeasSurfAcc ActsTrk::TrackParamsEstimationTool::m_uncalibMeasSurfAcc {}

private

Definition at line 101 of file TrackParamsEstimationTool.h.

{};

m_useLongSeeds

Gaudi::Property< int > ActsTrk::TrackParamsEstimationTool::m_useLongSeeds

private

Initial value:

{this, "useLongSeeds", 2,
        "0=use 1st 3 SPs, 1=use first,middle,last SPs to improve pT measurement, 2=use for all parameters"}

Definition at line 81 of file TrackParamsEstimationTool.h.

                                        {this, "useLongSeeds", 2,
        "0=use 1st 3 SPs, 1=use first,middle,last SPs to improve pT measurement, 2=use for all parameters"};

---

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

• TrackParamsEstimationTool.h
• TrackParamsEstimationTool.cxx