CovarianceEngine.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2019-2020 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include <cmath>
#include <functional>

#include "Acts/EventData/TrackParameters.hpp"
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Surfaces/Surface.hpp"
#include "Acts/Utilities/Definitions.hpp"

namespace Acts {

namespace detail {

std::tuple<BoundParameters, BoundMatrix, double> 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);

std::tuple<CurvilinearParameters, BoundMatrix, double> curvilinearState(
    BoundSymMatrix& covarianceMatrix, BoundMatrix& jacobian,
    FreeMatrix& transportJacobian, FreeVector& derivatives,
    BoundToFreeMatrix& jacobianLocalToGlobal, const FreeVector& parameters,
    bool covTransport, double accumulatedPath);

void covarianceTransport(
    std::reference_wrapper<const GeometryContext> geoContext,
    BoundSymMatrix& covarianceMatrix, BoundMatrix& jacobian,
    FreeMatrix& transportJacobian, FreeVector& derivatives,
    BoundToFreeMatrix& jacobianLocalToGlobal, const FreeVector& parameters,
    const Surface& surface);

void covarianceTransport(BoundSymMatrix& covarianceMatrix,
                         BoundMatrix& jacobian, FreeMatrix& transportJacobian,
                         FreeVector& derivatives,
                         BoundToFreeMatrix& jacobianLocalToGlobal,
                         const Vector3D& direction);
}  // namespace detail
}  // namespace Acts