ActsHGTDLayerBuilder.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ACTSGEOMETRY_ACTSHGTDLAYERBUILDER_H
#define ACTSGEOMETRY_ACTSHGTDLAYERBUILDER_H
 
// PACKAGE
#include "ActsGeometry/ActsDetectorElement.h"
#include "ActsGeometry/ActsElementVector.h"
 
// ATHENA
#include "CxxUtils/checker_macros.h"
#include <mutex>
 
// ACTS
#include "Acts/Geometry/ILayerBuilder.hpp"
#include "Acts/Utilities/Logger.hpp"
#include "Acts/Utilities/BinningType.hpp"
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Definitions/Units.hpp"
 
class ActsTrackingGeomtrySvc;
 
class HGTD_ID;
class HGTD_DetectorManager;
class ActsDetectorElement;
 
namespace Acts {
class Surface;
class LayerCreator;
}

class ActsHGTDLayerBuilder : public Acts::ILayerBuilder
{
public:
 
  using ElementVector = ActsElementVector;

 
  struct Config
  {
    std::string                          configurationName = "undefined";
    const HGTD_DetectorManager*   mng {nullptr};
    const HGTD_ID* idHelper = nullptr;
    std::shared_ptr<const Acts::LayerCreator> layerCreator = nullptr;
    Acts::BinningType bTypePhi = Acts::equidistant;
    Acts::BinningType bTypeR = Acts::equidistant;
    Acts::BinningType bTypeZ = Acts::equidistant;
 
    std::shared_ptr<ElementVector> elementStore {nullptr};
 
    std::array<double, 2> endcapEnvelopeR = {50 * Acts::UnitConstants::mm,
                                                 50 * Acts::UnitConstants::mm}; // m_discEnvelopeR in athena/HighGranularityTimingDetector/HGTD_Reconstruction/HGTD_TrackingGeometry/src/HGTD_LayerBuilderCond.cxx
    std::array<double, 2> endcapEnvelopeZ = {0.2 * Acts::UnitConstants::mm,
                                                 0.2 * Acts::UnitConstants::mm}; // m_discThickness
 
    std::pair<size_t, size_t> endcapMaterialBins = {20, 50}; //{Phi, R}
 
    bool objDebugOutput = false;

    double numberOfBinsFactor = 5.0;
  };

 
  ActsHGTDLayerBuilder(const Config&                cfg,
                    std::unique_ptr<const Acts::Logger> logger);

  virtual ~ActsHGTDLayerBuilder() = default;
 
  virtual const Acts::LayerVector
  negativeLayers(const Acts::GeometryContext& gctx) const override;
 
  virtual const Acts::LayerVector
  centralLayers(const Acts::GeometryContext& gctx) const override;
 
  virtual const Acts::LayerVector
  positiveLayers(const Acts::GeometryContext& gctx) const override;
 
  virtual
  const std::string&
  identification() const override
  {
    return m_cfg.configurationName;
  }
 
private:
  Config m_cfg;

  const Acts::Logger&
  logger() const
  {
    return *m_logger;
  }
 
  std::vector<std::shared_ptr<const ActsDetectorElement>>
  getDetectorElements() const;

  std::unique_ptr<const Acts::Logger> m_logger;
 
  // Private helper method : build layers
  // @param layers is goint to be filled
  // @param type is the indication which ones to build -1 | 0 | 1
  void
  buildEndcap(const Acts::GeometryContext& gctx, Acts::LayerVector& layersOutput, int type = 0) const;
 
};
 
#endif