TrackExtensionHypothesis.h

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// Copyright 2019-2026 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef TRACKINGITSU_INCLUDE_TRACKEXTENSIONHYPOTHESIS_H_
#define TRACKINGITSU_INCLUDE_TRACKEXTENSIONHYPOTHESIS_H_
 
#include <array>
 
#include "GPUCommonDef.h"
#include "DataFormatsITS/TimeEstBC.h"
#include "ITStracking/Constants.h"
#include "ITStracking/TrackITSInternal.h"
#include "ReconstructionDataFormats/Track.h"
 
namespace o2::its
{
 
template <int NLayers>
struct TrackExtensionHypothesis {
  TrackExtensionHypothesis() = default;
  GPUhdi() TrackExtensionHypothesis(const TrackITSInternal<NLayers>& track, bool outward)
  {
    initialiseFromTrack(track, outward);
  }
 
  GPUhdi() void initialiseFromTrack(const TrackITSInternal<NLayers>& track, bool outward)
  {
    param = outward ? track.paramOut : track.paramIn;
    time = track.time;
    chi2 = track.getChi2();
    nClusters = track.getNClusters();
    edgeLayer = outward ? track.getLastClusterLayer() : track.getFirstClusterLayer();
    for (int iLayer{0}; iLayer < NLayers; ++iLayer) {
      clusters[iLayer] = track.getClusterIndex(iLayer);
    }
  }
 
  o2::track::TrackParCov param;
  std::array<int, NLayers> clusters{};
  TimeEstBC time;
  float chi2{0.f};
  int nClusters{0};
  int edgeLayer{constants::UnusedIndex};
};
 
} // namespace o2::its
 
#endif /* TRACKINGITSU_INCLUDE_TRACKEXTENSIONHYPOTHESIS_H_ */