File TrackSelector.hpp

namespace Acts

Note

This file is foreseen for the Geometry module to replace Extent

Functions

inline std::ostream &operator<<(std::ostream &os, const TrackSelector::Config &cuts)

Parameters

os – Output stream
cuts – Cuts to print

Returns

Reference to the output stream

inline std::ostream &operator<<(std::ostream &os, const TrackSelector::EtaBinnedConfig &cfg)

Parameters

os – Output stream
cfg – Configuration to print

Returns

Reference to the output stream

class TrackSelector

#include <Acts/TrackFinding/TrackSelector.hpp>

Class which performs filtering of tracks.

It accepts an input and an output track container and uses the built-in copy facility to copy tracks into the output container.

Public Functions

inline TrackSelector(const Config &config)

Constructor from a single cut config object.

Parameters: config – is the configuration object

inline TrackSelector(const EtaBinnedConfig &config)

Constructor from a multi-eta.

Parameters: config – is the configuration object

inline const EtaBinnedConfig &config() const

Get readonly access to the config parameters.

Returns: the config object

template<typename track_proxy_t> bool isValidTrack(const track_proxy_t &track) const

Helper function to check if a track is valid.

Template Parameters: track_proxy_t – is the type of the track proxy
Parameters: track – is the track proxy
Returns: true if the track is valid

template<typename input_tracks_t, typename output_tracks_t> void selectTracks(const input_tracks_t &inputTracks, output_tracks_t &outputTracks) const

Select tracks from an input container and copy them into an output container.

Template Parameters

input_tracks_t – is the type of the input track container
output_tracks_t – is the type of the output track container

Parameters

inputTracks – is the input track container
outputTracks – is the output track container

Private Members

EtaBinnedConfig m_cfg

bool m_isUnbinned

bool m_noEtaCuts

Private Static Attributes

static constexpr double inf = std::numeric_limits<double>::infinity()

struct Config

#include <Acts/TrackFinding/TrackSelector.hpp>

Configuration of a set of cuts for a single eta bin Default construction yields a set of cuts that accepts everything.

Public Functions

inline Config &absEta(double min, double max)

Set the absolute eta acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &eta(double min, double max)

Set the eta acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &loc0(double min, double max)

Set loc0 acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &loc1(double min, double max)

Set loc1 acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &phi(double min, double max)

Set phi acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &pt(double min, double max)

Set the pt acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

inline Config &time(double min, double max)

Set time acceptance range.

Parameters

min – Minimum value
max – Maximum value

Returns

Reference to this object

Public Members

double absEtaMax = inf

double absEtaMin = 0.0

double etaMax = inf

double etaMin = -inf

double loc0Max = inf

double loc0Min = -inf

double loc1Max = inf

double loc1Min = -inf

std::size_t minMeasurements = 0

double phiMax = inf

double phiMin = -inf

double ptMax = inf

double ptMin = 0.0

double timeMax = inf

double timeMin = -inf

Friends

friend std::ostream &operator<<(std::ostream &os, const Config &cuts)

Print this set of cuts to an output stream.

Parameters

os – Output stream
cuts – Cuts to print

Returns

Reference to the output stream

struct EtaBinnedConfig

#include <Acts/TrackFinding/TrackSelector.hpp>

Main config object for the track selector.

Combines a set of cut configurations and corresponding eta bins

Public Functions

inline EtaBinnedConfig()

Construct an empty (accepts everything) configuration.

Results in a single cut set and one abs eta bin from 0 to infinity.

inline EtaBinnedConfig(Config cutSet)

Auto-converting constructor from a single cut configuration.

Results in a single absolute eta bin from 0 to infinity.

inline EtaBinnedConfig(double etaMin)

Constructor to create a config object that is not upper-bounded.

This is useful to use the “fluent” API to populate the configuration.

Parameters: etaMin – Minimum eta bin edge

inline EtaBinnedConfig(std::vector<double> absEtaEdgesIn)

Constructor from a vector of eta bin edges.

This automatically initializes all the cuts to be the same for all eta and be essentially no-op.

Parameters: absEtaEdgesIn – is the vector of eta bin edges

inline EtaBinnedConfig &addCuts(const std::function<void(Config&)> &callback = {})

Add a new eta bin with an upper bound of +infinity.

Parameters: callback – Callback to configure the cuts for this eta bin
Returns: Reference to this object

inline EtaBinnedConfig &addCuts(double etaMax, const std::function<void(Config&)> &callback = {})

Add a new eta bin with the given upper bound.

Parameters

etaMax – Upper bound of the new eta bin
callback – Callback to configure the cuts for this eta bin

Returns

Reference to this object

inline std::size_t binIndex(double eta) const

Get the index of the eta bin for a given eta.

Parameters: eta – Eta value
Returns: Index of the eta bin

inline const Config &getCuts(double eta) const

Get the cuts for a given eta.

Parameters: eta – Eta value
Returns: Cuts for the given eta

inline std::size_t nEtaBins() const

Get the number of eta bins.

Returns: Number of eta bins

Public Members

std::vector<double> absEtaEdges = {}: Eta bin edges for varying cuts by eta.

std::vector<Config> cutSets = {}: Cut sets for each eta bin.

Friends

friend std::ostream &operator<<(std::ostream &os, const EtaBinnedConfig &cfg)