Acts::AtlasStepper::State Struct Reference

Nested State struct for the local caching. More...

#include <Acts/Propagator/AtlasStepper.hpp>

Collaboration diagram for Acts::AtlasStepper::State:

Public Member Functions
	State (const Options &optionsIn, MagneticFieldProvider::Cache fieldCacheIn)
	Constructor.

Public Attributes
Covariance	cov = Covariance::Zero()
	Local covariance matrix storage.
const Covariance *	covariance = nullptr
	Pointer to external covariance matrix.
bool	covTransport = false
	Flag indicating whether covariance transport is enabled.
bool	debug = false
	Debug output the string where debug messages are stored (optionally).
std::size_t	debugMsgWidth = 50
	Width for debug message formatting.
std::size_t	debugPfxWidth = 30
	buffer & formatting for consistent output
std::string	debugString = ""
	String buffer for debug output messages.
Vector3	field = Vector3::Zero()
	Current magnetic field vector.
MagneticFieldProvider::Cache	fieldCache
	It caches the current magnetic field cell and stays (and interpolates) within as long as this is valid.
double	jacobian [eBoundSize *eBoundSize] = {}
	Jacobian matrix storage for parameter derivatives.
double	maxPathLength = 0
	Maximum path length for this propagation.
bool	mcondition = false
	Flag indicating magnetic field boundary conditions.
bool	needgradient = false
	Flag indicating whether magnetic field gradients are needed.
bool	newfield = true
	Flag indicating new magnetic field evaluation needed.
std::size_t	nSteps = 0
	Total number of performed steps.
std::size_t	nStepTrials = 0
	Totoal number of attempted steps.
Options	options
	Stepper options for this propagation.
double	parameters [eBoundSize] = {0., 0., 0., 0., 0., 0.}
	Storage pattern of pVector /dL0 /dL1 /dPhi /the /dCM /dT X ->P[0] dX / P[ 8] P[16] P[24] P[32] P[40] P[48] Y ->P[1] dY / P[ 9] P[17] P[25] P[33] P[41] P[49] Z ->P[2] dZ / P[10] P[18] P[26] P[34] P[42] P[50] T ->P[3] dT/ P[11] P[19] P[27] P[35] P[43] P[51] Ax ->P[4] dAx/ P[12] P[20] P[28] P[36] P[44] P[52] Ay ->P[5] dAy/ P[13] P[21] P[29] P[37] P[45] P[53] Az ->P[6] dAz/ P[14] P[22] P[30] P[38] P[46] P[54] CM ->P[7] dCM/ P[15] P[23] P[31] P[39] P[47] P[55] Cache: P[56] - P[59].
ParticleHypothesis	particleHypothesis = ParticleHypothesis::pion()
	Particle hypothesis used for energy loss calculations.
double	pathAccumulated = 0.
	Accumulated path length during propagation.
double	previousStepSize = 0.
	Previous step size for overstep estimation.
std::array< double, 60 >	pVector {}
	Parameter vector for track state and derivatives.
bool	state_ready = false
	Flag indicating whether the state is ready for stepping.
StepperStatistics	statistics
	The statistics of the stepper.
double	step = 0
	Current step size.
ConstrainedStep	stepSize
	Constrained step size for adaptive integration.
bool	useJacobian = false
	Flag indicating whether Jacobian calculation is enabled.

Detailed Description

Nested State struct for the local caching.

Constructor & Destructor Documentation

State()

Acts::AtlasStepper::State::State	(	const Options &	optionsIn,
		MagneticFieldProvider::Cache	fieldCacheIn )

Constructor.

Template Parameters

Type	of TrackParameters

Parameters

[in]	optionsIn	The options for the stepper
[in]	fieldCacheIn	The magnetic field cache

Member Data Documentation

fieldCache

MagneticFieldProvider::Cache Acts::AtlasStepper::State::fieldCache

It caches the current magnetic field cell and stays (and interpolates) within as long as this is valid.

See step() code for details.