MPGDHitReconstruction.h

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// SPDX-License-Identifier: LGPL-3.0-or-later
// Copyright (C) 2022 - 2026 Whitney Armstrong, Sylvester Joosten, Wouter Deconinck, Dmitry Romanov, Yann Bedfer
 
#pragma once
 
#include <DDRec/CellIDPositionConverter.h>
#include <Parsers/Primitives.h>
#include <algorithms/algorithm.h>
#include <algorithms/geo.h>
#include <edm4eic/RawTrackerHitCollection.h>
#include <edm4eic/TrackerHitCollection.h>
#include <gsl/pointers>
#include <string>
#include <string_view>
 
#include "MPGDHitReconstructionConfig.h"
#include "algorithms/interfaces/WithPodConfig.h"
 
namespace eicrecon {
 
using MPGDHitReconstructionAlgorithm =
    algorithms::Algorithm<algorithms::Input<edm4eic::RawTrackerHitCollection>,
                          algorithms::Output<edm4eic::TrackerHitCollection>>;
 
class MPGDHitReconstruction : public MPGDHitReconstructionAlgorithm,
                              public WithPodConfig<MPGDHitReconstructionConfig> {
 
public:
  MPGDHitReconstruction(std::string_view name)
      : MPGDHitReconstructionAlgorithm{
            name, {"inputRawHits"}, {"outputHits"}, "reconstruct raw hits into tracker hits."} {}
 
  void init() final;
 
  void process(const Input&, const Output&) const final;
 
private:
  const algorithms::GeoSvc& m_geo{algorithms::GeoSvc::instance()};
  const dd4hep::rec::CellIDPositionConverter* m_converter{m_geo.cellIDPositionConverter()};
  const dd4hep::BitFieldCoder* m_id_dec;
  // CellIDs specifying IDDescriptor fields.
  void parseIDDescriptor();
  int m_coordOffsets[2];          // Offsets of coordinate fields
  dd4hep::CellID m_subVolBits{0}; // SUBVOLUME = all but coordinates
  dd4hep::CellID m_pStripBit{0};  // 'p' strip
  dd4hep::CellID m_nStripBit{0};  // 'n' strip
};
 
} // namespace eicrecon