CovarianceEngine.hpp File Reference

#include "Acts/Utilities/detail/ReferenceWrapperAnyCompat.hpp"
#include "Acts/Definitions/Algebra.hpp"
#include "Acts/Definitions/TrackParametrization.hpp"
#include "Acts/EventData/TrackParameters.hpp"
#include "Acts/EventData/detail/CorrectedTransformationFreeToBound.hpp"
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Surfaces/Surface.hpp"
#include "Acts/Utilities/Result.hpp"
#include <cmath>
#include <functional>
#include <tuple>
#include <variant>

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Namespaces
namespace	Acts
	Acts includes to create all necessary definitions.
namespace	Acts::detail
	These functions perform the transport of a covariance matrix using given Jacobians. The required data is provided by the stepper object with some additional data. Since this is a purely algebraic problem the calculations are identical for StraightLineStepper and EigenStepper. As a consequence the methods can be located in a separate file.

Functions
Result< std::tuple < BoundTrackParameters, BoundMatrix, double > >	Acts::detail::boundState (const GeometryContext &geoContext, BoundSquareMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacToGlobal, FreeVector &parameters, const ParticleHypothesis &particleHypothesis, bool covTransport, double accumulatedPath, const Surface &surface, const FreeToBoundCorrection &freeToBoundCorrection=FreeToBoundCorrection(false))
	It does not check if the transported state is at the surface, this needs to be guaranteed by the propagator.
std::tuple < CurvilinearTrackParameters, BoundMatrix, double >	Acts::detail::curvilinearState (BoundSquareMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacToGlobal, const FreeVector &parameters, const ParticleHypothesis &particleHypothesis, bool covTransport, double accumulatedPath)
	This creates a curvilinear state.
void	Acts::detail::transportCovarianceToBound (const GeometryContext &geoContext, BoundSquareMatrix &boundCovariance, BoundMatrix &fullTransportJacobian, FreeMatrix &freeTransportJacobian, FreeVector &freeToPathDerivatives, BoundToFreeMatrix &boundToFreeJacobian, FreeVector &freeParameters, const Surface &surface, const FreeToBoundCorrection &freeToBoundCorrection=FreeToBoundCorrection(false))
	Method for on-demand covariance transport of a bound/curvilinear to another bound representation.
void	Acts::detail::transportCovarianceToCurvilinear (BoundSquareMatrix &boundCovariance, BoundMatrix &fullTransportJacobian, FreeMatrix &freeTransportJacobian, FreeVector &freeToPathDerivatives, BoundToFreeMatrix &boundToFreeJacobian, const Vector3 &direction)
	Method for on-demand covariance transport of a bound/curvilinear to a new curvilinear representation.