InDet::SCT_OverlapDescriptor Class Reference

Class to describe overlaps in the SCT detector, it extends the Trk::OverlapDescriptor base class. More...

#include <SCT_OverlapDescriptor.h>

Inheritance diagram for InDet::SCT_OverlapDescriptor:

Collaboration diagram for InDet::SCT_OverlapDescriptor:

Public Member Functions
	SCT_OverlapDescriptor (bool addMoreSurfaces=false, int eta_slices=4)
	Constructor.
virtual	~SCT_OverlapDescriptor ()=default
	Destructor.
SCT_OverlapDescriptor *	clone () const
	Pseudo-Constructor.
bool	reachableSurfaces (std::vector< Trk::SurfaceIntersection > &cSurfaces, const Trk::Surface &sf, const Amg::Vector3D &pos, const Amg::Vector3D &dir) const
	get the compatible surfaces

Private Member Functions
bool	dumpSurfaces (std::vector< Trk::SurfaceIntersection > &surfaces) const

Private Attributes
bool	m_robustMode
bool	m_addMoreSurfaces
int	m_etaSlices
std::atomic< const SCT_ID * >	m_sctIdHelper {nullptr}

Detailed Description

Class to describe overlaps in the SCT detector, it extends the Trk::OverlapDescriptor base class.

Author

Andre.nosp@m.as.S.nosp@m.alzbu.nosp@m.rger.nosp@m.@cern.nosp@m..ch

Definition at line 73 of file SCT_OverlapDescriptor.h.

Constructor & Destructor Documentation

SCT_OverlapDescriptor()

InDet::SCT_OverlapDescriptor::SCT_OverlapDescriptor	(	bool	addMoreSurfaces = false,
		int	eta_slices = 4 )

Constructor.

Definition at line 20 of file SCT_OverlapDescriptor.cxx.

  : m_robustMode(true),
  m_addMoreSurfaces(addMoreSurfaces), 
  m_etaSlices(eta_slices)
{}

~SCT_OverlapDescriptor()

virtual InDet::SCT_OverlapDescriptor::~SCT_OverlapDescriptor ( )

virtualdefault

Destructor.

Member Function Documentation

clone()

SCT_OverlapDescriptor * InDet::SCT_OverlapDescriptor::clone ( ) const

inlinevirtual

Pseudo-Constructor.

Implements Trk::OverlapDescriptor.

Definition at line 99 of file SCT_OverlapDescriptor.h.

{ return new SCT_OverlapDescriptor(); }     

dumpSurfaces()

bool InDet::SCT_OverlapDescriptor::dumpSurfaces ( std::vector< Trk::SurfaceIntersection > & surfaces ) const

private

Definition at line 141 of file SCT_OverlapDescriptor.cxx.

                                                                                               {
  
  if (m_sctIdHelper==nullptr) {
    // get DetectorStore service
    SmartIF<StoreGateSvc> detStore{Gaudi::svcLocator()->service("DetectorStore")};
    if (!detStore.isValid()) {
      return false;
    }
 
    const SCT_ID* sctIdHelper = nullptr;
    if (detStore->retrieve(sctIdHelper, "SCT_ID").isFailure()) {
      return false;
    }
    m_sctIdHelper = sctIdHelper;
  }
 
  std::cout << "Dumping Surfaces for SCT with size = " << surfaces.size() << std::endl;
  for (auto & surface : surfaces) {
    Identifier hitId = (surface.object)->associatedDetectorElementIdentifier(); 
    std::cout <<  "barrel_ec " << m_sctIdHelper.load()->barrel_ec(hitId) 
              << ", layer_disk " << m_sctIdHelper.load()->layer_disk(hitId) << ", phi_module " << m_sctIdHelper.load()->phi_module(hitId) 
              << ", eta_module " << m_sctIdHelper.load()->eta_module(hitId) << ", side " << m_sctIdHelper.load()->side(hitId) <<std::endl;
  }  
  return true;
}

reachableSurfaces()

bool InDet::SCT_OverlapDescriptor::reachableSurfaces ( std::vector< Trk::SurfaceIntersection > & cSurfaces, const Trk::Surface & sf, const Amg::Vector3D & pos, const Amg::Vector3D & dir ) const

virtual

get the compatible surfaces

< position phi and surface phi - rescale to 0 -> 2PI

Implements Trk::OverlapDescriptor.

Definition at line 28 of file SCT_OverlapDescriptor.cxx.

{
  // first add the target surface and the backside surface (in the if statement)
  cSurfaces.emplace_back(Trk::Intersection(pos, 0., true), &tsf);
 
  // make sure we have the correct associated element
  const auto* tmp = tsf.associatedDetectorElement();
  const InDetDD::SiDetectorElement* sElement =
    tmp->detectorType() == Trk::DetectorElemType::Silicon
      ? static_cast<const InDetDD::SiDetectorElement*>(tmp)
      : nullptr;
      
  if (sElement) {
    
    size_t newCapacity = cSurfaces.size() + 2;
    if (m_robustMode and m_addMoreSurfaces and sElement->isBarrel()) {
      // sum up the defined slices to evaluate the new capacity
      // only uses one additional slice in phi
      newCapacity += (2 + 6*m_etaSlices)*2;
    } else if (m_robustMode) {
      newCapacity += 16;
    } else {
      newCapacity += 6;
    }
    cSurfaces.reserve(newCapacity);
    
    double surfacePhi = tsf.center().phi() + M_PI;
    double positionPhi = pos.phi() + M_PI;
 
    // now get the overlap options
    addOtherSide(sElement, cSurfaces);
 
    // 8-cell-connectivity depending on track/surface geometry
    // nPhi - can be jump + or -
    const InDetDD::SiDetectorElement* nElement = nullptr;
 
    // robust mode --> return 9 (*2) surfaces
    if (m_robustMode) {
      addNextInPhiOS(sElement, cSurfaces);
      addNextInEtaOS(sElement, cSurfaces);
 
      addPrevInPhiOS(sElement, cSurfaces);
      addPrevInEtaOS(sElement, cSurfaces);
 
      nElement = sElement->nextInPhi();
      addNextInEtaOS(nElement, cSurfaces);
      addPrevInEtaOS(nElement, cSurfaces);
 
      nElement = sElement->prevInPhi();
      addNextInEtaOS(nElement, cSurfaces);
      addPrevInEtaOS(nElement, cSurfaces);
      
      if (m_addMoreSurfaces and sElement->isBarrel()) {  
        unsigned int next = 1;
        const InDetDD::SiDetectorElement* currentElement = sElement->nextInEta();
        while (currentElement and next<(unsigned int)m_etaSlices) {
          addNextInEtaOS(currentElement,cSurfaces);
          currentElement = currentElement->nextInEta();
          if (currentElement) {
            addNextInPhiOS(currentElement,cSurfaces);
            addPrevInPhiOS(currentElement,cSurfaces);
          }
          next++;
        }
        
        unsigned int prev = 1;
        currentElement = sElement->prevInEta();
        while (currentElement and prev<(unsigned int)m_etaSlices) {
          addPrevInEtaOS(currentElement,cSurfaces);
          currentElement = currentElement->prevInEta();
          if (currentElement) {
            addNextInPhiOS(currentElement,cSurfaces);
            addPrevInPhiOS(currentElement,cSurfaces);
          }
          prev++;
        }
      }      
      
    } else {
      // get the phi information
      if (surfacePhi < positionPhi) {
        addNextInPhiOS(sElement, cSurfaces);
        nElement = sElement->nextInPhi();
      } else {
        addPrevInPhiOS(sElement, cSurfaces);
        nElement = sElement->prevInPhi();
      }
      // get the eta information - also possible
      double positionEta = pos.eta();
      double surfaceEta = tsf.center().eta();
      int side = (sElement->isBarrel() || surfaceEta > 0.) ? 1 : -1;
      // check the surface / position eta values
      if (side * surfaceEta < side * positionEta) {
        // we go next in eta for both, the original and the phi jumped one
        addNextInEtaOS(sElement, cSurfaces);
        addNextInEtaOS(nElement, cSurfaces);
      } else {
        // opposite direction
        addPrevInEtaOS(sElement, cSurfaces);
        addPrevInEtaOS(nElement, cSurfaces);
      }
    }
  }
 
  return false;
}

Member Data Documentation

m_addMoreSurfaces

bool InDet::SCT_OverlapDescriptor::m_addMoreSurfaces

private

Definition at line 94 of file SCT_OverlapDescriptor.h.

m_etaSlices

int InDet::SCT_OverlapDescriptor::m_etaSlices

private

Definition at line 95 of file SCT_OverlapDescriptor.h.

m_robustMode

bool InDet::SCT_OverlapDescriptor::m_robustMode

private

Definition at line 93 of file SCT_OverlapDescriptor.h.

m_sctIdHelper

std::atomic<const SCT_ID*> InDet::SCT_OverlapDescriptor::m_sctIdHelper {nullptr}

mutableprivate

Definition at line 96 of file SCT_OverlapDescriptor.h.

{nullptr};

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

• SCT_OverlapDescriptor.h
• SCT_OverlapDescriptor.cxx