LineParameters.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <tracking/trackFindingCDC/geometry/UncertainParameters.h>
 
namespace Belle2 {
 
  namespace TrackFindingCDC {

    namespace NLineParameterIndices {

      enum ELineParameter {

        c_Phi0 = 0,

        c_I = 1,

        c_N = 2,
      };
    }

    using ELineParameter = NLineParameterIndices::ELineParameter;
 
    // Guard to prevent repeated template symbol emission
    struct LineUtil;
    extern template struct UncertainParametersUtil<LineUtil, ELineParameter>;

    struct LineUtil : UncertainParametersUtil<LineUtil, ELineParameter> {

      static ParameterVector reversalSigns()
      {
        return ParameterVector({ -1.0, -1.0});
      }

      static double average(const LineUtil::ParameterVector& fromPar,
                            const LineUtil::CovarianceMatrix& fromCov,
                            const LineUtil::ParameterVector& toPar,
                            const LineUtil::CovarianceMatrix& toCov,
                            LineUtil::ParameterVector& avgPar,
                            LineUtil::CovarianceMatrix& avgCov);
    };

    using LineParameters = LineUtil::ParameterVector;

    using LineCovariance = LineUtil::CovarianceMatrix;

    using LinePrecision = LineUtil::PrecisionMatrix;

    using LineJacobian = LineUtil::JacobianMatrix;
 
  }

}