ActsTrk::PixelClusteringTool Class Reference

#include <PixelClusteringTool.h>

Inheritance diagram for ActsTrk::PixelClusteringTool:

Collaboration diagram for ActsTrk::PixelClusteringTool:

Public Member Functions
	PixelClusteringTool (const std::string &type, const std::string &name, const IInterface *parent)
virtual StatusCode	clusterize (const EventContext &ctx, const RawDataCollection &RDOs, const InDet::SiDetectorElementStatus &pixelDetElStatus, const InDetDD::SiDetectorElement &element, Acts::Ccl::ClusteringData &data, std::vector< ClusterCollection > &collection) const override
virtual StatusCode	makeClusters (const EventContext &ctx, typename IPixelClusteringTool::ClusterCollection &clusters, const InDetDD::SiDetectorElement &element, typename ClusterContainer::iterator itrContainer) const override
virtual StatusCode	initialize () override

Private Member Functions
StatusCode	makeCluster (const EventContext &ctx, PixelClusteringTool::Cluster &cluster, const InDetDD::SiDetectorElement *element, const InDetDD::PixelModuleDesign &design, const PixelChargeCalibCondData *calibData, const PixelChargeCalibCondData::CalibrationStrategy calibStrategy, xAOD::PixelCluster &container) const
IPixelClusteringTool::CellCollection	unpackRDOs (const RawDataCollection &RDOs, const InDet::SiDetectorElementStatus &stripDetElStatus, const InDetDD::SiDetectorElement &element) const

Static Private Member Functions
static std::optional< Identifier >	isGanged (const Identifier &rdoID, const InDetDD::SiDetectorElement &element)

Private Attributes
ServiceHandle< InDetDD::IPixelReadoutManager >	m_pixelReadout
ToolHandle< ISiLorentzAngleTool >	m_pixelLorentzAngleTool {this, "PixelLorentzAngleTool", "", "Tool to retreive Lorentz angle of Pixel"}
SG::ReadCondHandleKey< PixelChargeCalibCondData >	m_chargeDataKey
Gaudi::Property< bool >	m_addCorners {this, "AddCorners", true}
Gaudi::Property< bool >	m_useWeightedPos {this, "UseWeightedPosition", false}
Gaudi::Property< bool >	m_broadErrors {this, "UseBroadErrors", false}
Gaudi::Property< bool >	m_checkGanged {this, "CheckGanged", false}
const PixelID *	m_pixelID {nullptr}

Detailed Description

Definition at line 22 of file PixelClusteringTool.h.

Constructor & Destructor Documentation

PixelClusteringTool()

ActsTrk::PixelClusteringTool::PixelClusteringTool	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent
	)

Definition at line 56 of file PixelClusteringTool.cxx.

    : base_class(type,name,parent)
{}

Member Function Documentation

clusterize()

StatusCode ActsTrk::PixelClusteringTool::clusterize ( const EventContext &  ctx, const RawDataCollection &  RDOs, const InDet::SiDetectorElementStatus &  pixelDetElStatus, const InDetDD::SiDetectorElement &  element, Acts::Ccl::ClusteringData &  data, std::vector< ClusterCollection > &  collection  ) const

overridevirtual

Definition at line 226 of file PixelClusteringTool.cxx.

{
  IdentifierHash idHash = RDOs.identifyHash();
  collection.emplace_back();
  if ( not pixelDetElStatus.isGood(idHash) ) {
    // the module being flagged as bad is not a failure
    // An empty cluster collection needs to be added because the assumption
    // is that there is one element per element RawDataCollection.
    return StatusCode::SUCCESS;
  }
 
  // Retrieve the cells from the detector element
  CellCollection cells = unpackRDOs(RDOs, pixelDetElStatus, element);
 
  Acts::Ccl::createClusters<CellCollection, ClusterCollection, 2>
    (data, cells, collection.back(), Acts::Ccl::DefaultConnect<Cell, 2>(m_addCorners));
  
  return StatusCode::SUCCESS;
}

initialize()

StatusCode ActsTrk::PixelClusteringTool::initialize ( )

overridevirtual

Definition at line 42 of file PixelClusteringTool.cxx.

{
  ATH_MSG_DEBUG("Initializing " << name() << " ...");
  ATH_CHECK(m_pixelLorentzAngleTool.retrieve());
  ATH_CHECK(m_pixelReadout.retrieve());
 
  ATH_CHECK(m_chargeDataKey.initialize(not m_chargeDataKey.empty()));
 
  ATH_CHECK( detStore()->retrieve(m_pixelID, "PixelID") );
  
  ATH_MSG_DEBUG(name() << " successfully initialized");
  return StatusCode::SUCCESS;
}

isGanged()

std::optional< Identifier > ActsTrk::PixelClusteringTool::isGanged ( const Identifier &  rdoID, const InDetDD::SiDetectorElement &  element  )

inlinestaticprivate

Definition at line 347 of file PixelClusteringTool.cxx.

{
  // If the pixel is ganged, returns a new identifier for it
  InDetDD::SiCellId cellID = element.cellIdFromIdentifier( rdoID );
  if ( element.numberOfConnectedCells( cellID ) > 1 ) {
    InDetDD::SiCellId gangedCellID = element.connectedCell( cellID, 1 );
    return element.identifierFromCellId( gangedCellID );
  } 
  return std::nullopt;
}

makeCluster()

StatusCode ActsTrk::PixelClusteringTool::makeCluster ( const EventContext &  ctx, PixelClusteringTool::Cluster &  cluster, const InDetDD::SiDetectorElement *  element, const InDetDD::PixelModuleDesign &  design, const PixelChargeCalibCondData *  calibData, const PixelChargeCalibCondData::CalibrationStrategy  calibStrategy, xAOD::PixelCluster &  container  ) const

private

Definition at line 62 of file PixelClusteringTool.cxx.

{ 
 
  Amg::Vector2D pos_acc(0,0);
  int tot_acc = 0;
 
  std::vector<float> chargeList;
  if (calibData) chargeList.reserve(cluster.ids.size());
  
  InDetDD::PixelDiodeTree::CellIndexType rowmax = std::numeric_limits<InDetDD::PixelDiodeTree::CellIndexType>::min();
  InDetDD::PixelDiodeTree::CellIndexType colmax = std::numeric_limits<InDetDD::PixelDiodeTree::CellIndexType>::min();
  InDetDD::PixelDiodeTree::CellIndexType rowmin = std::numeric_limits<InDetDD::PixelDiodeTree::CellIndexType>::max();
  InDetDD::PixelDiodeTree::CellIndexType colmin = std::numeric_limits<InDetDD::PixelDiodeTree::CellIndexType>::max();
  InDetDD::PixelDiodeTree::DiodeProxyWithPosition colmin_diode{};
  InDetDD::PixelDiodeTree::DiodeProxyWithPosition colmax_diode{};
  InDetDD::PixelDiodeTree::DiodeProxyWithPosition rowmin_diode{};
  InDetDD::PixelDiodeTree::DiodeProxyWithPosition rowmax_diode{};
 
  // We temporary comment this since it is not used
  // bool hasGanged = false;
 
  IdentifierHash moduleHash = element->identifyHash();
 
  for (size_t i = 0; i < cluster.ids.size(); i++) {
 
    //Construct the identifier class
    Identifier id = Identifier(cluster.ids[i]);
 
    // We temporary comment this since it is not used
    // TODO: Check how the ganged info is used in legacy
    // if (multiChip)  {
    //   hasGanged = hasGanged ||
    //  m_pixelRDOTool->isGanged(id, element).has_value();
    // }
 
    int tot = cluster.tots.at(i);
    float charge = tot;
 
    std::array<InDetDD::PixelDiodeTree::CellIndexType,2> diode_idx
       = InDetDD::PixelDiodeTree::makeCellIndex(m_pixelID->phi_index(id),
                                                m_pixelID->eta_index(id));
    InDetDD::PixelDiodeTree::DiodeProxyWithPosition si_param ( design.diodeProxyFromIdxCachePosition(diode_idx));
 
    if (calibData) {
 
      if (design.getReadoutTechnology() != InDetDD::PixelReadoutTechnology::RD53) {
    ATH_MSG_ERROR("Chip type is not recognized!");
    return StatusCode::FAILURE;
      }
 
      // The calibration strategy is updated for each element
      // Retrieving the calibration only depends on FE and not per cell (can be further optimized)
      // Single FE modules could have an optimized getCharge function where the calib constants are cached
      std::uint32_t feValue = design.getFE(si_param);
      auto diode_type = design.getDiodeType(si_param);
 
      charge = calibData->getCharge(diode_type,
                    calibStrategy,
                    moduleHash,
                    feValue,
                    tot);
      chargeList.push_back(charge);
    }
    
    const InDetDD::PixelDiodeTree::CellIndexType &row = diode_idx[0];
    const InDetDD::PixelDiodeTree::CellIndexType &col = diode_idx[1];
    if (row>rowmax) {
       rowmax=row;
       rowmax_diode = si_param;
    }
    if (row<rowmin) {
       rowmin=row;
       rowmin_diode = si_param;
    }
    if (col>colmax) {
       colmax=col;
       colmax_diode = si_param;
    }
    if (col<colmin) {
       colmin=col;
       colmin_diode = si_param;
    }
 
    // We compute the digital position as a sum of all RDO positions
    // all with the same weight of 1
    // We do not compute a charge-weighted center of gravity here (by default) since
    // we observe it to be worse than the digital position
    // ToT-weighted center of gravity must not be used
    if (m_useWeightedPos) {
      pos_acc += charge * si_param.position();
      tot_acc += charge;
    } else {
      pos_acc += si_param.position();
      tot_acc += 1;
    }
    
  }
  
  if (tot_acc > 0)
    pos_acc /= tot_acc;
 
  
  const int colWidth = colmax - colmin + 1;
  const int rowWidth = rowmax - rowmin + 1;
 
  double etaWidth = colmax_diode.xEtaMax() - colmin_diode.xEtaMin(); // design.widthFromColumnRange(colmin, colmax);
  double phiWidth = rowmax_diode.xPhiMax() - rowmin_diode.xPhiMin(); // design.widthFromColumnRange(colmin, colmax);
 
  // ask for Lorentz correction, get global position
  double shift = m_pixelLorentzAngleTool->getLorentzShift(moduleHash, ctx);
  const Amg::Vector2D localPos = pos_acc;
  Amg::Vector2D locpos(localPos[Trk::locX]+shift, localPos[Trk::locY]);
  // find global position of element
  const Amg::Transform3D& T = element->surface().transform();
  double Ax[3] = {T(0,0),T(1,0),T(2,0)};
  double Ay[3] = {T(0,1),T(1,1),T(2,1)};
  double R [3] = {T(0,3),T(1,3),T(2,3)};
  
  const Amg::Vector2D&    M = locpos;
  Amg::Vector3D globalPos(M[0]*Ax[0]+M[1]*Ay[0]+R[0],M[0]*Ax[1]+M[1]*Ay[1]+R[1],M[0]*Ax[2]+M[1]*Ay[2]+R[2]);
 
  // Compute error matrix
  float width0, width1;
  if (m_broadErrors) {
      // Use cluster width
      width0 = phiWidth;
      width1 = etaWidth;
  } else {
      // Use average pixel width
      width0 = phiWidth / rowWidth;
      width1 = etaWidth / colWidth;
  }
 
  // Actually create the cluster (i.e. fill the values)
  
  Eigen::Matrix<float,2,1> localPosition(locpos.x(), locpos.y());
  Eigen::Matrix<float,2,2> localCovariance = Eigen::Matrix<float,2,2>::Zero();
  localCovariance(0, 0) = width0 * width0 / 12.0f; 
  localCovariance(1, 1) = width1 * width1 / 12.0f;
  
  xaodcluster.setMeasurement<2>(moduleHash, localPosition, localCovariance);
  xaodcluster.setIdentifier( cluster.ids.front() );
  xaodcluster.setRDOlist(std::move(cluster.ids));
  xaodcluster.globalPosition() = globalPos.cast<float>();
  xaodcluster.setTotalToT( xAOD::xAODInDetMeasurement::Utilities::computeTotalToT(cluster.tots) );
  xaodcluster.setToTlist(std::move(cluster.tots));
  xaodcluster.setTotalCharge( xAOD::xAODInDetMeasurement::Utilities::computeTotalCharge(chargeList) );
  xaodcluster.setChargelist(std::move(chargeList));
  xaodcluster.setLVL1A(cluster.lvl1min);
  xaodcluster.setChannelsInPhiEta(rowWidth,colWidth);
  xaodcluster.setWidthInEta(static_cast<float>(etaWidth));
  xaodcluster.setIsSplit(false);
  xaodcluster.setSplitProbabilities(0.0, 0.0);
    
  return StatusCode::SUCCESS;
}

makeClusters()

StatusCode ActsTrk::PixelClusteringTool::makeClusters ( const EventContext &  ctx, typename IPixelClusteringTool::ClusterCollection &  clusters, const InDetDD::SiDetectorElement &  element, typename ClusterContainer::iterator  itrContainer  ) const

overridevirtual

Definition at line 253 of file PixelClusteringTool.cxx.

{
  // We'd need a smarter move here!!!
  
  // Retrieve the calibration data
  const PixelChargeCalibCondData *calibData = nullptr;
  if (not m_chargeDataKey.empty()) {
    SG::ReadCondHandle<PixelChargeCalibCondData> calibDataHandle = SG::makeHandle( m_chargeDataKey, ctx );
    calibData = calibDataHandle.cptr();
    
    if (!calibData) {
      ATH_MSG_ERROR("PixelChargeCalibCondData requested but couldn't be retrieved from " << m_chargeDataKey.key());
      return StatusCode::FAILURE;
    }
  }
  
  // Get the element design
  const InDetDD::PixelModuleDesign& design = 
    static_cast<const InDetDD::PixelModuleDesign&>(element.design());
  
  // Get the calibration strategy for this module. 
  // Default to RD53 if the calibData is not available. That is fine because it won't be used anyway
  auto calibrationStrategy = calibData ? calibData->getCalibrationStrategy(element.identifyHash()) : PixelChargeCalibCondData::CalibrationStrategy::RD53;
  
  for (typename IPixelClusteringTool::Cluster& cl : clusters) {
    xAOD::PixelCluster* xaodCluster = *itrContainer;
    ATH_CHECK(makeCluster(ctx,
              cl,
              &element,
              design,
              calibData,
              calibrationStrategy,
              *xaodCluster));
    ++itrContainer;
  }
  
  return StatusCode::SUCCESS;
}

unpackRDOs()

IPixelClusteringTool::CellCollection ActsTrk::PixelClusteringTool::unpackRDOs ( const RawDataCollection &  RDOs, const InDet::SiDetectorElementStatus &  stripDetElStatus, const InDetDD::SiDetectorElement &  element  ) const

private

Definition at line 296 of file PixelClusteringTool.cxx.

{
  // Get the element design
  const InDetDD::PixelModuleDesign& design =
    static_cast<const InDetDD::PixelModuleDesign&>(element.design());
  CellCollection cells;
  cells.reserve(300);
  
  const IdentifierHash& idHash = RDOs.identifyHash();
  for (const auto *const rdo : RDOs) {
    const Identifier& rdoID = rdo->identify();
    std::array<InDetDD::PixelDiodeTree::CellIndexType,2> diode_idx
      = InDetDD::PixelDiodeTree::makeCellIndex(m_pixelID->phi_index(rdoID),
                                               m_pixelID->eta_index(rdoID));
    InDetDD::PixelDiodeTree::DiodeProxy si_param ( design.diodeProxyFromIdx(diode_idx));
    std::uint32_t fe = design.getFE(si_param);
    
    // check if good RDO
    // the pixel RDO tool here says always good if m_useModuleMap is false
    if (not pixelDetElStatus.isChipGood(idHash, fe)) {
      continue;
    }
    
    const int lvl1 = rdo->getLVL1A();
    const int tot = rdo->getToT();
    
    cells.emplace_back(m_pixelID->phi_index(rdoID),
                       m_pixelID->eta_index(rdoID),
                       tot,
                       lvl1,
                       rdoID.get_compact());
    
    if ( m_checkGanged ) {
      std::optional<Identifier> gangedID = isGanged(rdoID, element);
      if (gangedID.has_value()) {
        cells.emplace_back(m_pixelID->phi_index(*gangedID),
                           m_pixelID->eta_index(*gangedID),
                           tot,
                           lvl1,
                           gangedID->get_compact());
      }
    }
    
  }
 
  return cells;
}

Member Data Documentation

m_addCorners

Gaudi::Property<bool> ActsTrk::PixelClusteringTool::m_addCorners {this, "AddCorners", true}

private

Definition at line 75 of file PixelClusteringTool.h.

m_broadErrors

Gaudi::Property<bool> ActsTrk::PixelClusteringTool::m_broadErrors {this, "UseBroadErrors", false}

private

Definition at line 77 of file PixelClusteringTool.h.

m_chargeDataKey

SG::ReadCondHandleKey<PixelChargeCalibCondData> ActsTrk::PixelClusteringTool::m_chargeDataKey

private

Initial value:

{this, "PixelChargeCalibCondData", "",
    "Pixel charge calibration data"}

Definition at line 72 of file PixelClusteringTool.h.

m_checkGanged

Gaudi::Property<bool> ActsTrk::PixelClusteringTool::m_checkGanged {this, "CheckGanged", false}

private

Definition at line 78 of file PixelClusteringTool.h.

m_pixelID

const PixelID* ActsTrk::PixelClusteringTool::m_pixelID {nullptr}

private

Definition at line 80 of file PixelClusteringTool.h.

m_pixelLorentzAngleTool

ToolHandle< ISiLorentzAngleTool > ActsTrk::PixelClusteringTool::m_pixelLorentzAngleTool {this, "PixelLorentzAngleTool", "", "Tool to retreive Lorentz angle of Pixel"}

private

Definition at line 70 of file PixelClusteringTool.h.

m_pixelReadout

ServiceHandle< InDetDD::IPixelReadoutManager > ActsTrk::PixelClusteringTool::m_pixelReadout

private

Initial value:

{this, "PixelReadoutManager", "InDetDD::ITk::PixelReadoutManager",
      "Pixel readout manager" }

Definition at line 67 of file PixelClusteringTool.h.

m_useWeightedPos

Gaudi::Property<bool> ActsTrk::PixelClusteringTool::m_useWeightedPos {this, "UseWeightedPosition", false}

private

Definition at line 76 of file PixelClusteringTool.h.

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The documentation for this class was generated from the following files:

• PixelClusteringTool.h
• PixelClusteringTool.cxx