IndexTableUtils.cxx

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// Copyright 2019-2020 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.
 
#include "ITStracking/IndexTableUtils.h"
 
namespace o2
{
namespace its
{
 
const std::vector<std::pair<int, int>> index_table_utils::selectClusters(
  const std::array<int, constants::index_table::ZBins * constants::index_table::PhiBins + 1>& indexTable,
  const std::array<int, 4>& selectedBinsRect)
{
  std::vector<std::pair<int, int>> filteredBins{};
 
  int phiBinsNum{selectedBinsRect[3] - selectedBinsRect[1] + 1};
 
  if (phiBinsNum < 0) {
    phiBinsNum += constants::index_table::PhiBins;
  }
 
  filteredBins.reserve(phiBinsNum);
 
  for (int iPhiBin{selectedBinsRect[1]}, iPhiCount{0}; iPhiCount < phiBinsNum;
       iPhiBin = ++iPhiBin == constants::index_table::PhiBins ? 0 : iPhiBin, iPhiCount++) {
 
    const int firstBinIndex{index_table_utils::getBinIndex(selectedBinsRect[0], iPhiBin)};
 
    filteredBins.emplace_back(indexTable[firstBinIndex],
                              countRowSelectedBins(indexTable, iPhiBin, selectedBinsRect[0], selectedBinsRect[2]));
  }
 
  return filteredBins;
}
} // namespace its
} // namespace o2