Acts::TrackDensityVertexFinder Class Reference

Finds a vertex seed based on the maximum of a track density function. More...

#include <Acts/Vertexing/TrackDensityVertexFinder.hpp>

Inheritance diagram for Acts::TrackDensityVertexFinder:

Collaboration diagram for Acts::TrackDensityVertexFinder:

Classes
struct	Config
	The Config struct. More...
struct	State
	State struct for fulfilling interface. More...

Public Member Functions
	TrackDensityVertexFinder (const Config &cfg)
	Constructor for user-defined InputTrack type.
Result< std::vector< Vertex > >	find (const std::vector< InputTrack > &trackVector, const VertexingOptions &vertexingOptions, IVertexFinder::State &state) const override
	Function that finds single vertex candidate.
IVertexFinder::State	makeState (const Acts::MagneticFieldContext &) const override
	Function to create a state object for this concrete vertex finder.
void	setTracksToRemove (IVertexFinder::State &, const std::vector< InputTrack > &) const override
	For vertex finders that have an internal state of active tracks, this method instructs them to mark used tracks for removal.
Public Member Functions inherited from Acts::IVertexFinder
virtual	~IVertexFinder ()=default
	Virtual destructor.

Additional Inherited Members
Public Types inherited from Acts::IVertexFinder
using	State = Acts::AnyBase<128>
	Type-erased wrapper for concrete state objects.

Detailed Description

Finds a vertex seed based on the maximum of a track density function.

Each track is modelled as a 2d density function around its d0/z0 perigee parameter values. The z seed position is then found as the position of the maximum of all summed track density functions.

Ref. (1): https://cds.cern.ch/record/2670380

Constructor & Destructor Documentation

TrackDensityVertexFinder()

Acts::TrackDensityVertexFinder::TrackDensityVertexFinder ( const Config & cfg )

explicit

Constructor for user-defined InputTrack type.

Parameters

cfg	Configuration object

Member Function Documentation

find()

Result< std::vector< Vertex > > Acts::TrackDensityVertexFinder::find ( const std::vector< InputTrack > & trackVector, const VertexingOptions & vertexingOptions, IVertexFinder::State & state ) const

overridevirtual

Function that finds single vertex candidate.

Parameters

trackVector	Input track collection
vertexingOptions	Vertexing options
state	State for fulfilling interfaces

Returns

Vector of vertices, filled with a single vertex (for consistent interfaces)

Implements Acts::IVertexFinder.

makeState()

IVertexFinder::State Acts::TrackDensityVertexFinder::makeState ( const Acts::MagneticFieldContext & mctx ) const

overridevirtual

Function to create a state object for this concrete vertex finder.

Parameters

mctx	The magnetic field context

Returns

The state object

Implements Acts::IVertexFinder.

setTracksToRemove()

void Acts::TrackDensityVertexFinder::setTracksToRemove ( IVertexFinder::State & anyState, const std::vector< InputTrack > & removedTracks ) const

overridevirtual

For vertex finders that have an internal state of active tracks, this method instructs them to mark used tracks for removal.

Parameters

anyState	The state object
removedTracks	The tracks to be removed

Implements Acts::IVertexFinder.