LineParameters.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2016 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Oliver Frost                                             *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
#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;
 
  }
 
}