File Track.hpp

namespace Acts

Note

This file is foreseen for the Geometry module to replace Extent

Typedefs

using ConstTrackAccessor = TrackAccessorBase<T, true>

using TrackAccessor = TrackAccessorBase<T, false>

Functions

template<typename track_container_t, typename traj_t>
TrackContainer(track_container_t &container, traj_t &traj) -> TrackContainer<track_container_t, traj_t, detail::RefHolder>

template<typename track_container_t, typename traj_t>
TrackContainer(track_container_t &&container, traj_t &&traj) -> TrackContainer<track_container_t, traj_t, detail::ValueHolder>

template<typename T>
struct IsReadOnlyTrackContainer

#include <Acts/EventData/Track.hpp>

template<typename T, bool ReadOnly>
struct TrackAccessorBase

#include <Acts/EventData/Track.hpp>

Utility class that eases accessing dynamic columns in track containers.

Template Parameters

• T – the type of the value to access

• ReadOnly – true if this is a const accessor

Public Functions

inline TrackAccessorBase(HashedString _key)

Create the accessor from an already-hashed string key.

Parameters

_key – the key

inline TrackAccessorBase(const std::string &_key)

Create the accessor from a string key.

Parameters

_key – the key

template<typename track_proxy_t, bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline T &operator()(track_proxy_t track) const

Access the stored key on the track given as an argument.

Mutable version

Template Parameters

track_proxy_t – the type of the track proxy

Parameters

track – the track to access

Returns

mutable reference to the column behind the key

template<typename track_proxy_t, bool RO = ReadOnly, typename = std::enable_if_t<RO>>
inline const T &operator()(track_proxy_t track) const

Access the stored key on the track given as an argument.

COnst version

Template Parameters

track_proxy_t – the type of the track proxy

Parameters

track – the track to access

Returns

const reference to the column behind the key

Public Members

HashedString key

template<typename track_container_t, typename traj_t, template<typename> class holder_t = detail::RefHolder>
class TrackContainer

#include <Acts/EventData/Track.hpp>

Track container interface class.

This type represents a collections of tracks. It uses a backend to store bothe the actual tracks and the associated track states.

Template Parameters

• track_container_t – the track container backend

• traj_t – the track state container backend

• holder_t – ownership management class for the backend

Public Types

using ConstTrackProxy = detail_tc::TrackProxy<track_container_t, traj_t, holder_t, true>

using IndexType = MultiTrajectoryTraits::IndexType

using TrackProxy = detail_tc::TrackProxy<track_container_t, traj_t, holder_t, false>

Public Functions

inline TrackContainer(holder_t<track_container_t> container, holder_t<traj_t> traj)

Constructor from a track container backend and a track state container backend.

Parameters

• container – the track container backend

• traj – the track state container backend

template<template<typename> class H = holder_t, typename = std::enable_if_t<detail::is_same_template<H, detail::RefHolder>::value>>
inline TrackContainer(track_container_t &container, traj_t &traj)

Constructor from references to a track container backend and to a track state container backend.

Note

The track container will not assume ownership over the backends in this case. You need to ensure suitable lifetime

Parameters

• container – the track container backend

• traj – the track state container backend

template<typename T, bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline constexpr void addColumn(const std::string &key)

Add a dymanic column to the track container.

Parameters

key – the name of the column to be added

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline IndexType addTrack()

Add a track to the container.

Note this only creates the logical track and allocates memory. You can combine this with getTrack to obtain a track proxy

Returns

the index to the newly added track

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto begin()

Get a mutable iterator to the first track in the container.

Returns

a mutable iterator to the first track

inline auto begin() const

Get an const iterator to the first track in the container.

Returns

a const iterator to the first track

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto &container()

Get a mutable reference to the track container backend.

Returns

a mutable reference to the backend

inline const auto &container() const

Get a const reference to the track container backend.

Returns

a const reference to the backend

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto end()

Get a past-the-end iterator for this container.

Returns

a past-the-end iterator

inline auto end() const

Get a past-the-end iterator for this container.

Returns

a past-the-end iterator

inline ConstTrackProxy getTrack(IndexType itrack) const

Get a const track proxy for a track index.

Parameters

itrack – the track index in the container

Returns

A const track proxy for the index

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline TrackProxy getTrack(IndexType itrack)

Get a mutable track proxy for a track index.

Parameters

itrack – the track index in the container

Returns

A mutable track proxy for the index

inline constexpr bool hasColumn(const std::string &key) const

Check if this track container has a specific dynamic column.

Parameters

key – the key to check for

inline constexpr bool hasColumn(HashedString key) const

Check if a this track container has a specific dynamic column.

Parameters

key – the key to check for

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline void removeTrack(IndexType itrack)

Remove a track at index itrack from the container.

Note

This invalidates all track proxies!

Parameters

itrack – The index of the track to remmove

inline constexpr IndexType size() const

Get the size of the track container.

Returns

the sixe

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto &trackStateContainer()

Get a mutable reference to the track state container backend.

Returns

a mutable reference to the backend

inline const auto &trackStateContainer() const

Get a const reference to the track state container backend.

Returns

a const reference to the backend

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto &trackStateContainerHolder()

Retrieve the holder of the track state container.

Returns

The track state container including it’s holder

inline const auto &trackStateContainerHolder() const

Retrieve the holder of the track state container.

Returns

The track state container including it’s holder

Public Static Attributes

static constexpr IndexType kInvalid = MultiTrajectoryTraits::kInvalid

static constexpr bool ReadOnly = IsReadOnlyTrackContainer<track_container_t>::value

static constexpr bool TrackStateReadOnly = IsReadOnlyMultiTrajectory<traj_t>::value

Protected Functions

template<typename T, HashedString key, bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline constexpr T &component(IndexType itrack)

template<typename T, bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline constexpr T &component(HashedString key, IndexType itrack)

template<typename T, HashedString key>
inline constexpr const T &component(IndexType itrack) const

template<typename T>
inline constexpr const T &component(HashedString key, IndexType itrack) const

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline constexpr TrackProxy::Covariance covariance(IndexType itrack)

inline constexpr ConstTrackProxy::ConstCovariance covariance(IndexType itrack) const

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline constexpr TrackProxy::Parameters parameters(IndexType itrack)

inline constexpr ConstTrackProxy::ConstParameters parameters(IndexType itrack) const

template<bool RO = ReadOnly, typename = std::enable_if_t<!RO>>
inline auto trackStateRange(IndexType itrack)

inline auto trackStateRange(IndexType itrack) const

Private Members

detail_tc::ConstIf<holder_t<track_container_t>, ReadOnly> m_container

detail_tc::ConstIf<holder_t<traj_t>, ReadOnly> m_traj