Acts::TripletSeedFinder Class Reference

Interface and a collection of standard implementations for a triplet seed finder. More...

#include <Acts/Seeding/TripletSeedFinder.hpp>

Classes
struct	Config
	Collection of configuration parameters for the triplet seed finder. More...
struct	DerivedConfig
	Derived configuration for the triplet seed finder using a magnetic field. More...

Public Member Functions
virtual const DerivedConfig &	config () const =0
	Returns the configuration of the triplet seed finder.
virtual DoubletsForMiddleSp::Range	createTripletTopCandidates (const SpacePointContainer &spacePoints, const ConstSpacePointProxy &spM, const DoubletsForMiddleSp::Proxy &bottomDoublet, DoubletsForMiddleSp::Range topDoublets, TripletTopCandidates &tripletTopCandidates) const =0
	Create triplets from the bottom, middle, and top space points.
virtual DoubletsForMiddleSp::Subset	createTripletTopCandidates (const SpacePointContainer &spacePoints, const ConstSpacePointProxy &spM, const DoubletsForMiddleSp::Proxy &bottomDoublet, DoubletsForMiddleSp::Subset topDoublets, TripletTopCandidates &tripletTopCandidates) const =0
	Create triplets from the bottom, middle, and top space points.
virtual DoubletsForMiddleSp::Subset2	createTripletTopCandidates (const SpacePointContainer &spacePoints, const ConstSpacePointProxy &spM, const DoubletsForMiddleSp::Proxy &bottomDoublet, DoubletsForMiddleSp::Subset2 topDoublets, TripletTopCandidates &tripletTopCandidates) const =0
	Create triplets from the bottom, middle, and top space points.

Static Public Member Functions
static std::unique_ptr< TripletSeedFinder >	create (const DerivedConfig &config)
	Creates a new triplet seed finder instance given the configuration.

Detailed Description

Interface and a collection of standard implementations for a triplet seed finder.

Note

The standard implementations rely on virtual function dispatch which did not turn out to affect the performance after measurement.

Member Function Documentation

config()

virtual const DerivedConfig & Acts::TripletSeedFinder::config ( ) const

pure virtual

Returns the configuration of the triplet seed finder.

Returns

Reference to the configuration object

create()

std::unique_ptr< TripletSeedFinder > Acts::TripletSeedFinder::create ( const DerivedConfig & config )

static

Creates a new triplet seed finder instance given the configuration.

Parameters

config

Configuration for the triplet seed finder

Returns

Unique pointer to new TripletSeedFinder instance

createTripletTopCandidates() [1/3]

virtual DoubletsForMiddleSp::Range Acts::TripletSeedFinder::createTripletTopCandidates ( const SpacePointContainer & spacePoints, const ConstSpacePointProxy & spM, const DoubletsForMiddleSp::Proxy & bottomDoublet, DoubletsForMiddleSp::Range topDoublets, TripletTopCandidates & tripletTopCandidates ) const

nodiscardpure virtual

Create triplets from the bottom, middle, and top space points.

Note

If the configuration declares the doublets sorted by cotTheta, the returned view is the input advanced past the top doublets that can no longer be compatible with any bottom doublet of a larger cotTheta. A caller sweeping the bottom doublets in ascending cotTheta has to feed the returned view to the next call, and start over from the full collection for the next middle space point.

Parameters

spacePoints	Space point container
spM	Space point candidate to be used as middle SP in a seed
bottomDoublet	Bottom doublet to be used for triplet creation
topDoublets	Top doublets to be used for triplet creation
tripletTopCandidates	Cache for triplet top candidates

Returns

The top doublets that can still be compatible with a subsequent bottom doublet, see the note above

createTripletTopCandidates() [2/3]

virtual DoubletsForMiddleSp::Subset Acts::TripletSeedFinder::createTripletTopCandidates ( const SpacePointContainer & spacePoints, const ConstSpacePointProxy & spM, const DoubletsForMiddleSp::Proxy & bottomDoublet, DoubletsForMiddleSp::Subset topDoublets, TripletTopCandidates & tripletTopCandidates ) const

nodiscardpure virtual

Create triplets from the bottom, middle, and top space points.

Parameters

spacePoints	Space point container
spM	Space point candidate to be used as middle SP in a seed
bottomDoublet	Bottom doublet to be used for triplet creation
topDoublets	Top doublets to be used for triplet creation
tripletTopCandidates	Cache for triplet top candidates

Returns

The top doublets that can still be compatible with a subsequent bottom doublet, see the note above

createTripletTopCandidates() [3/3]

virtual DoubletsForMiddleSp::Subset2 Acts::TripletSeedFinder::createTripletTopCandidates ( const SpacePointContainer & spacePoints, const ConstSpacePointProxy & spM, const DoubletsForMiddleSp::Proxy & bottomDoublet, DoubletsForMiddleSp::Subset2 topDoublets, TripletTopCandidates & tripletTopCandidates ) const

nodiscardpure virtual

Create triplets from the bottom, middle, and top space points.

Parameters

spacePoints	Space point container
spM	Space point candidate to be used as middle SP in a seed
bottomDoublet	Bottom doublet to be used for triplet creation
topDoublets	Top doublets to be used for triplet creation
tripletTopCandidates	Cache for triplet top candidates

Returns

The top doublets that can still be compatible with a subsequent bottom doublet, see the note above