FitSegmentPairVarSet.cc

/**************************************************************************
 * 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.                  *
 **************************************************************************/
#include <tracking/trackFindingCDC/filters/segmentPair/FitSegmentPairVarSet.h>
 
#include <tracking/trackFindingCDC/fitting/CDCAxialStereoFusion.h>
 
#include <tracking/trackingUtilities/eventdata/tracks/CDCSegmentPair.h>
#include <tracking/trackingUtilities/eventdata/trajectories/CDCTrajectory3D.h>
#include <tracking/trackingUtilities/geometry/HelixParameters.h>
#include <tracking/trackingUtilities/geometry/Vector3D.h>
 
using namespace Belle2;
using namespace TrackFindingCDC;
using namespace TrackingUtilities;
 
FitSegmentPairVarSet::FitSegmentPairVarSet(bool preliminaryFit)
  : Super()
  , m_preliminaryFit(preliminaryFit)
{
}
 
bool FitSegmentPairVarSet::extract(const CDCSegmentPair* ptrSegmentPair)
{
  if (not ptrSegmentPair) return false;
 
  const CDCSegmentPair& segmentPair = *ptrSegmentPair;
 
  CDCAxialStereoFusion axialStereoFusion;
  if (m_preliminaryFit) {
    axialStereoFusion.fusePreliminary(segmentPair);
  } else {
    axialStereoFusion.reconstructFuseTrajectories(segmentPair);
  }
  CDCTrajectory3D fit = segmentPair.getTrajectory3D();
  Vector3D support3D = fit.getSupport();
 
  finitevar<named("ndf")>() = fit.isFitted() ? fit.getNDF() : NAN;
  finitevar<named("chi2")>() = fit.getChi2();
  finitevar<named("p_value")>() = fit.getPValue();
 
  finitevar<named("curv")>() = fit.isFitted() ? fit.getCurvatureXY() : NAN;
  finitevar<named("z0")>() = support3D.z();
  finitevar<named("tanl")>() = fit.getTanLambda();
 
  using namespace NHelixParameterIndices;
  finitevar<named("curv_var")>() = fit.getLocalVariance(c_Curv);
  finitevar<named("z0_var")>() = fit.getLocalVariance(c_Z0);
  finitevar<named("tanl_var")>() = fit.getLocalVariance(c_TanL);
 
  return true;
}
 
std::vector<Named<Float_t*> > FitSegmentPairVarSet::getNamedVariables(const std::string& prefix)
{
  return m_preliminaryFit ?
         Super::getNamedVariables(prefix + "pre_") :
         Super::getNamedVariables(prefix);
}