CorePixelSpacePointFormationTool.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ACTSTRK_DATAPREPARATION_COREPIXELSPACEPOINTFORMATIONTOOL_H
#define ACTSTRK_DATAPREPARATION_COREPIXELSPACEPOINTFORMATIONTOOL_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "ActsToolInterfaces/IPixelSpacePointFormationTool.h"
#include "ActsCalibrators/xAODUncalibMeasSurfAcc.h"
#include "ActsGeometryInterfaces/ITrackingGeometrySvc.h"
 
#include "AthenaKernel/SlotSpecificObj.h"
#include "CxxUtils/checker_macros.h"
#include "GaudiKernel/EventContext.h"
 
#include "xAODInDetMeasurement/PixelClusterContainer.h"
#include "xAODInDetMeasurement/SpacePointContainer.h"
 
#include <limits>
#include <string>
 
namespace ActsTrk {

 
  class CorePixelSpacePointFormationTool : public extends<AthAlgTool, ActsTrk::IPixelSpacePointFormationTool> {
  public:
    using base_class::base_class;
    virtual ~CorePixelSpacePointFormationTool() = default;
 
    virtual StatusCode initialize() override;
 
    virtual StatusCode producePixelSpacePoint(const EventContext& ctx,
                          const Acts::GeometryContext& gctx,
                          const xAOD::PixelCluster& cluster,
                          xAOD::SpacePoint& sp,
                          const InDetDD::SiDetectorElement& element) const override;
 
    virtual bool usesGeometryContext() const override { return true; }
 
  private:
 
    ServiceHandle<ActsTrk::ITrackingGeometrySvc> m_trackingGeometrySvc{this, "TrackingGeometrySvc", "ActsTrackingGeometrySvc"};
 
    ActsTrk::detail::xAODUncalibMeasSurfAcc m_surfaceAccessor{};

    struct SurfaceCache {
      Acts::RotationMatrix3 rotLocalToGlobal{Acts::RotationMatrix3::Identity()};
      xAOD::DetectorIDHashType idHash{std::numeric_limits<xAOD::DetectorIDHashType>::max()};
      EventContext::ContextEvt_t evt{EventContext::INVALID_CONTEXT_EVT};
    };
    mutable SG::SlotSpecificObj<SurfaceCache> m_surfaceCache ATLAS_THREAD_SAFE;
 
    Gaudi::Property<bool> m_useSurfaceCache{this, "UseSurfaceCache", true,
      "Reuse the surface reference frame across the clusters of a module"};

    Gaudi::Property<bool> m_useMaxVariance{this, "UseMaxVariance", false};
    Gaudi::Property<float> m_maxVarianceZ{this, "MaxVarianceZ", 0.0014f};
    Gaudi::Property<float> m_maxVarianceR{this, "MaxVarianceR", 0.015f};
 
  };
 
}
 
#endif