Acts::StraightLineStepper::State Struct Reference

State for track parameter propagation. More...

#include <Acts/Propagator/StraightLineStepper.hpp>

Collaboration diagram for Acts::StraightLineStepper::State:

Public Member Functions
	State (const Options &optionsIn)
	Constructor from the initial bound track parameters.

Public Attributes
std::optional< FreeMatrix >	additionalFreeCovariance = std::nullopt
	Additional free parameter covariance matrix.
Covariance	cov = Covariance::Zero()
	Covariance matrix for track parameter uncertainties.
bool	covTransport = false
	Boolean to indicate if you need covariance transport.
FreeVector	derivative = FreeVector::Zero()
	The propagation derivative.
Jacobian	jacobian = Jacobian::Identity()
	The full jacobian of the transport entire transport.
BoundToFreeMatrix	jacToGlobal = BoundToFreeMatrix::Zero()
	Jacobian from local to the global frame.
FreeMatrix	jacTransport = FreeMatrix::Identity()
	Pure transport jacobian part from runge kutta integration.
std::size_t	nSteps = 0
	Total number of performed steps.
std::size_t	nStepTrials = 0
	Totoal number of attempted steps.
Options	options
	Configuration options for the stepper.
FreeVector	pars = FreeVector::Zero()
	Internal free vector parameters.
ParticleHypothesis	particleHypothesis = ParticleHypothesis::pion()
	Particle hypothesis.
double	pathAccumulated = 0.
	accumulated path length state
double	previousStepSize = 0.
	Previous step size for overstep estimation (ignored for straight line stepper).
StepperStatistics	statistics
	Statistics of the stepper.
ConstrainedStep	stepSize
	adaptive step size of the runge-kutta integration

Detailed Description

State for track parameter propagation.

Constructor & Destructor Documentation

State()

Acts::StraightLineStepper::State::State ( const Options & optionsIn )

explicit

Constructor from the initial bound track parameters.

Parameters

[in]

optionsIn

The options for the stepper

Note

the covariance matrix is copied when needed

Member Data Documentation

additionalFreeCovariance

std::optional<FreeMatrix> Acts::StraightLineStepper::State::additionalFreeCovariance = std::nullopt

Additional free parameter covariance matrix.

cov

Covariance Acts::StraightLineStepper::State::cov = Covariance::Zero()

Covariance matrix for track parameter uncertainties.

covTransport

bool Acts::StraightLineStepper::State::covTransport = false

Boolean to indicate if you need covariance transport.

derivative

FreeVector Acts::StraightLineStepper::State::derivative = FreeVector::Zero()

The propagation derivative.

jacobian

Jacobian Acts::StraightLineStepper::State::jacobian = Jacobian::Identity()

The full jacobian of the transport entire transport.

jacToGlobal

BoundToFreeMatrix Acts::StraightLineStepper::State::jacToGlobal = BoundToFreeMatrix::Zero()

Jacobian from local to the global frame.

jacTransport

FreeMatrix Acts::StraightLineStepper::State::jacTransport = FreeMatrix::Identity()

Pure transport jacobian part from runge kutta integration.

nSteps

std::size_t Acts::StraightLineStepper::State::nSteps = 0

Total number of performed steps.

nStepTrials

std::size_t Acts::StraightLineStepper::State::nStepTrials = 0

Totoal number of attempted steps.

options

Options Acts::StraightLineStepper::State::options

Configuration options for the stepper.

pars

FreeVector Acts::StraightLineStepper::State::pars = FreeVector::Zero()

Internal free vector parameters.

particleHypothesis

ParticleHypothesis Acts::StraightLineStepper::State::particleHypothesis = ParticleHypothesis::pion()

Particle hypothesis.

pathAccumulated

double Acts::StraightLineStepper::State::pathAccumulated = 0.

accumulated path length state

previousStepSize

double Acts::StraightLineStepper::State::previousStepSize = 0.

Previous step size for overstep estimation (ignored for straight line stepper).

statistics

StepperStatistics Acts::StraightLineStepper::State::statistics

Statistics of the stepper.

stepSize

ConstrainedStep Acts::StraightLineStepper::State::stepSize

adaptive step size of the runge-kutta integration