Struct StraightLineStepper::State¶
Defined in File StraightLineStepper.hpp
Nested Relationships¶
This struct is a nested type of Class StraightLineStepper.
Struct Documentation¶
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struct
Acts::StraightLineStepper
::
State
State for track parameter propagation.
Public Functions
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State
() = delete
Constructor from the initial bound track parameters.
- Note
the covariance matrix is copied when needed
- Template Parameters
charge_t
: Type of the bound parameter charge
- Parameters
[in] gctx
: is the context object for the geometry[in] mctx
: is the context object for the magnetic field[in] par
: The track parameters at start[in] ndir
: The navigation direciton w.r.t momentum[in] ssize
: is the maximum step size[in] stolerance
: is the stepping tolerance
Public Members
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Covariance
cov
= Covariance::Zero()
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bool
covTransport
= false Boolean to indiciate if you need covariance transport.
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FreeVector
derivative
= FreeVector::Zero() The propagation derivative.
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std::reference_wrapper<const GeometryContext>
geoContext
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BoundToFreeMatrix
jacToGlobal
= BoundToFreeMatrix::Zero() Jacobian from local to the global frame.
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FreeMatrix
jacTransport
= FreeMatrix::Identity() Pure transport jacobian part from runge kutta integration.
Navigation direction, this is needed for searching.
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FreeVector
pars
= FreeVector::Zero() Internal free vector parameters.
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double
pathAccumulated
= 0. accummulated path length state
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double
previousStepSize
= 0.
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double
q
= 1. The charge as the free vector can be 1/p or q/p.
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ConstrainedStep
stepSize
= std::numeric_limits<double>::max() adaptive step size of the runge-kutta integration
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double
tolerance
= s_onSurfaceTolerance The tolerance for the stepping.
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