CovarianceEngine.hpp File Reference

#include <cmath>
#include <functional>
#include "Acts/EventData/TrackParameters.hpp"
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Surfaces/Surface.hpp"
#include "Acts/Utilities/Definitions.hpp"

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Namespaces
namespace	Acts
	Set the Geometry Context PLUGIN.
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 seperate file.

Functions
std::tuple< BoundParameters, BoundMatrix, double >	Acts::detail::boundState (std::reference_wrapper< const GeometryContext > geoContext, BoundSymMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacobianLocalToGlobal, const FreeVector &parameters, bool covTransport, double accumulatedPath, const Surface &surface)
	It does not check if the transported state is at the surface, this needs to be guaranteed by the propagator.
std::tuple < CurvilinearParameters, BoundMatrix, double >	Acts::detail::curvilinearState (BoundSymMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacobianLocalToGlobal, const FreeVector &parameters, bool covTransport, double accumulatedPath)
	This creates a curvilinear state.
void	Acts::detail::covarianceTransport (std::reference_wrapper< const GeometryContext > geoContext, BoundSymMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacobianLocalToGlobal, const FreeVector &parameters, const Surface &surface)
	Method for on-demand transport of the covariance to a new frame at current position in parameter space.
void	Acts::detail::covarianceTransport (BoundSymMatrix &covarianceMatrix, BoundMatrix &jacobian, FreeMatrix &transportJacobian, FreeVector &derivatives, BoundToFreeMatrix &jacobianLocalToGlobal, const Vector3D &direction)
	Method for on-demand transport of the covariance to a new frame at current position in parameter space.