Trk::GaussianTrackDensity Class Reference

Implementation of IVertexTrackDensityEstimator modeling reconstructed tracks as two-dimensional Gaussian distributions in (d0, z0) space and sampling the aggregate density distribution at user-requested points along the beam axis. More...

#include <GaussianTrackDensity.h>

Inheritance diagram for Trk::GaussianTrackDensity:

Collaboration diagram for Trk::GaussianTrackDensity:

Classes
class	TrackDensity
struct	TrackDensityEval
struct	TrackEntry

Public Member Functions
virtual double	globalMaximum (const std::vector< const Track * > &vectorTrk) const override final
	Find position of global maximum for density function.
virtual double	globalMaximum (const std::vector< const Track * > &vectorTrk, std::unique_ptr< ITrackDensity > &density) const override final
	Find position of global maximum for density function.
virtual double	globalMaximum (const std::vector< const TrackParameters * > &perigeeList) const override final
	Find position of global maximum for density function.
virtual double	globalMaximum (const std::vector< const TrackParameters * > &perigeeList, std::unique_ptr< ITrackDensity > &density) const override final
	Find position of global maximum for density function.
virtual std::pair< double, double >	globalMaximumWithWidth (const std::vector< const TrackParameters * > &perigeeList) const override final

Private Member Functions
double	globalMaximumImpl (const std::vector< const TrackParameters * > &perigeeList, TrackDensity &density) const
	Find position of global maximum for density function.
std::pair< double, double >	globalMaximumWithWidthImpl (const std::vector< const TrackParameters * > &perigeeList, TrackDensity &density) const
	Find position of global maximum with Gaussian width for density function.
void	addTracks (const std::vector< const TrackParameters * > &perigeeList, TrackDensity &density) const
	Add a set of tracks to a density object.

Private Attributes
Gaudi::Property< double >	m_d0MaxSignificance
Gaudi::Property< double >	m_z0MaxSignificance
Gaudi::Property< bool >	m_gaussStep

Detailed Description

Implementation of IVertexTrackDensityEstimator modeling reconstructed tracks as two-dimensional Gaussian distributions in (d0, z0) space and sampling the aggregate density distribution at user-requested points along the beam axis.

Author

Dave Casper dcasp.nosp@m.er@u.nosp@m.ci.ed.nosp@m.u

Christos Anastopoulos (Athena MT)

Definition at line 31 of file GaussianTrackDensity.h.

Member Function Documentation

addTracks()

void Trk::GaussianTrackDensity::addTracks ( const std::vector< const TrackParameters * > & perigeeList, TrackDensity & density ) const

private

Add a set of tracks to a density object.

Parameters

perigeeList	Set of track parameters to add.
density	Density object to which to add.

Definition at line 109 of file GaussianTrackDensity.cxx.

  {
    const double d0SignificanceCut = m_d0MaxSignificance * m_d0MaxSignificance;
    const double z0SignificanceCut = m_z0MaxSignificance * m_z0MaxSignificance;
 
    for (const TrackParameters* iparam : perigeeList) {
      if (iparam && iparam->surfaceType() == Trk::SurfaceType::Perigee) {
        density.addTrack(*(static_cast<const Perigee*>(iparam)),
                         d0SignificanceCut,
                         z0SignificanceCut);
      }
    }
  }

globalMaximum() [1/4]

double Trk::GaussianTrackDensity::globalMaximum ( const std::vector< const Track * > & vectorTrk ) const

finaloverridevirtual

Find position of global maximum for density function.

Parameters

vectorTrk

List of input tracks.

Definition at line 20 of file GaussianTrackDensity.cxx.

  {
    std::vector<const TrackParameters*> perigeeList;
    perigeeList.reserve(vectorTrk.size());
 
    for (const Track* itrk : vectorTrk)
    {
      perigeeList.push_back(itrk->perigeeParameters());
    }
 
    TrackDensity d (m_gaussStep);
    return globalMaximumImpl (perigeeList, d);
  }

globalMaximum() [2/4]

double Trk::GaussianTrackDensity::globalMaximum ( const std::vector< const Track * > & vectorTrk, std::unique_ptr< ITrackDensity > & density ) const

finaloverridevirtual

Find position of global maximum for density function.

Parameters

vectorTrk	List of input tracks.
density[out]	Helper to hold density results.

Definition at line 40 of file GaussianTrackDensity.cxx.

  {
    std::vector<const TrackParameters*> perigeeList;
    perigeeList.reserve(vectorTrk.size());
 
    for (const Track* itrk : vectorTrk)
    {
      perigeeList.push_back(itrk->perigeeParameters());
    }
    return globalMaximum (perigeeList, density);
  }

globalMaximum() [3/4]

double Trk::GaussianTrackDensity::globalMaximum ( const std::vector< const TrackParameters * > & perigeeList ) const

finaloverridevirtual

Find position of global maximum for density function.

Parameters

perigeeList	List of input tracks.
vectorTrk	List of input tracks.

Definition at line 58 of file GaussianTrackDensity.cxx.

  {
    TrackDensity d (m_gaussStep);
    return globalMaximumImpl (perigeeList, d);
  }

globalMaximum() [4/4]

double Trk::GaussianTrackDensity::globalMaximum ( const std::vector< const TrackParameters * > & perigeeList, std::unique_ptr< ITrackDensity > & density ) const

finaloverridevirtual

Find position of global maximum for density function.

Parameters

perigeeList	List of input tracks.
density[out]	Helper to hold density results.

Definition at line 70 of file GaussianTrackDensity.cxx.

  {
    auto d = std::make_unique<TrackDensity> (m_gaussStep);
    TrackDensity* dp = d.get();
    density = std::move(d);
    return globalMaximumImpl (perigeeList, *dp);
  }

globalMaximumImpl()

double Trk::GaussianTrackDensity::globalMaximumImpl ( const std::vector< const TrackParameters * > & perigeeList, TrackDensity & density ) const

private

Find position of global maximum for density function.

Parameters

pergigeeList	List of input tracks.
density	Helper density object.

Definition at line 90 of file GaussianTrackDensity.cxx.

  {
    addTracks (perigeeList, density);
    return density.globalMaximum ();
  }

globalMaximumWithWidth()

std::pair< double, double > Trk::GaussianTrackDensity::globalMaximumWithWidth ( const std::vector< const TrackParameters * > & perigeeList ) const

finaloverridevirtual

Definition at line 79 of file GaussianTrackDensity.cxx.

                                                                  {
    TrackDensity d (m_gaussStep);
    return globalMaximumWithWidthImpl (perigeeList, d);
  }

globalMaximumWithWidthImpl()

std::pair< double, double > Trk::GaussianTrackDensity::globalMaximumWithWidthImpl ( const std::vector< const TrackParameters * > & perigeeList, TrackDensity & density ) const

private

Find position of global maximum with Gaussian width for density function.

Parameters

pergigeeList	List of input tracks.
density	Helper density object.

Definition at line 97 of file GaussianTrackDensity.cxx.

  {
    addTracks (perigeeList, density);
    return density.globalMaximumWithWidth ();
  }

Member Data Documentation

m_d0MaxSignificance

Gaudi::Property<double> Trk::GaussianTrackDensity::m_d0MaxSignificance

private

Initial value:

{
      this,
      "MaxD0Significance",
      3.5,
      "Maximum radial impact parameter significance to use track"
    }

Definition at line 230 of file GaussianTrackDensity.h.

                                             {
      this,
      "MaxD0Significance",
      3.5,
      "Maximum radial impact parameter significance to use track"
    };

m_gaussStep

Gaudi::Property<bool> Trk::GaussianTrackDensity::m_gaussStep

private

Initial value:

{
      this,
      "GaussianStep",
      true,
      "Peak search: True means assume Gaussian behavior, False means "
      "Newton/parabolic"
    }

Definition at line 249 of file GaussianTrackDensity.h.

                                   {
      this,
      "GaussianStep",
      true,
      "Peak search: True means assume Gaussian behavior, False means "
      "Newton/parabolic"
    };

m_z0MaxSignificance

Gaudi::Property<double> Trk::GaussianTrackDensity::m_z0MaxSignificance

private

Initial value:

{
      this,
      "MaxZ0Significance",
      12.0,
      "Maximum longitudinal impact parameter significance to include track in "
      "weight"
    }

Definition at line 239 of file GaussianTrackDensity.h.

                                             {
      this,
      "MaxZ0Significance",
      12.0,
      "Maximum longitudinal impact parameter significance to include track in "
      "weight"
    };

---

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

• GaussianTrackDensity.h
• GaussianTrackDensity.cxx