TrackParameters_v1.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef XAODTRACKING_VERSIONS_TRACKPARAMETERS_V1_H
#define XAODTRACKING_VERSIONS_TRACKPARAMETERS_V1_H
#include <cstdint>
#include "AthContainers/AuxElement.h"
#include "EventPrimitives/EventPrimitives.h"
 
namespace xAOD {
 
    class TrackParameters_v1 : public SG::AuxElement {
    public:
        // plain std::vectors are mapped to Eigen vectors or matrices
        // TODO a common location for this types
        using ConstVectorMap = Eigen::Map<const Eigen::Matrix<double, 6, 1>>;
        using VectorMap = Eigen::Map<Eigen::Matrix<double, 6, 1>>;
        using ConstMatrixMap = Eigen::Map<const Eigen::Matrix<double, 6, 6>>;
        using MatrixMap = Eigen::Map<Eigen::Matrix<double, 6, 6>>;
 
        TrackParameters_v1() = default;

        ConstVectorMap paramsEigen() const;
        VectorMap paramsEigen();

        ConstMatrixMap covMatrixEigen() const;

        MatrixMap covMatrixEigen();

        void resize(size_t sz = 6);
    };
}
#endif