Struct AtlasStepper::State

• Defined in File AtlasStepper.hpp

Nested Relationships

This struct is a nested type of Template Class AtlasStepper.

Struct Documentation

struct Acts::AtlasStepper::State

Nested State struct for the local caching.

Public Functions

State() = delete

Default constructor - deleted.

template<typename Parameters>
State(std::reference_wrapper<const GeometryContext> gctx, std::reference_wrapper<const MagneticFieldContext> mctx, const Parameters &pars, NavigationDirection ndir = forward, double ssize = std::numeric_limits<double>::max(), double stolerance = s_onSurfaceTolerance)

Constructor.

Type of TrackParameters

Parameters

• [in] gctx: The geometry contex tof this call

• [in] mctx: The magnetic field context of this call

• [in] pars: Input parameters

• [in] ndir: The navigation direction w.r.t. parameters

• [in] ssize: the steps size limitation

• [in] stolerance: is the stepping tolerance

Public Members

Covariance cov = Covariance::Zero()

const Covariance *covariance

bool covTransport = false

bool debug = false

Debug output the string where debug messages are stored (optionally)

size_t debugMsgWidth = 50

size_t debugPfxWidth = 30

buffer & formatting for consistent output

std::string debugString = ""

Vector3D field

bfield_t::Cache fieldCache

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

See step() code for details.

std::reference_wrapper<const GeometryContext> geoContext

Cache the geometry context.

double jacobian[eBoundParametersSize * eBoundParametersSize]

double maxPathLength

bool mcondition

NavigationDirection navDir

bool needgradient

bool newfield

double parameters[eBoundParametersSize] = {0., 0., 0., 0., 0., 0.}

Storage pattern of pVector /dL0 /dL1 /dPhi /dThe /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].

double pathAccumulated = 0.

double previousStepSize = 0.

std::array<double, 60> pVector

bool state_ready = false

double step

ConstrainedStep stepSize = std::numeric_limits<double>::max()

double tolerance = s_onSurfaceTolerance

The tolerance for the stepping.

bool useJacobian