PositionCalc Class Reference

#include <PositionCalc.h>

Public Types
typedef std::vector< std::pair< DetId, double > >	HitsAndEnergies
typedef std::vector< std::pair< DetId, float > >	HitsAndFractions

Public Member Functions
template<typename HitType >
math::XYZPoint	Calculate_Location (const HitsAndFractions &iDetIds, const edm::SortedCollection< HitType > *iRecHits, const CaloSubdetectorGeometry *iSubGeom, const CaloSubdetectorGeometry *iESGeom=nullptr)
const PositionCalc &	operator= (const PositionCalc &rhs)
	PositionCalc (const edm::ParameterSet &par)
	PositionCalc ()

Private Attributes
const CaloSubdetectorGeometry *	m_esGeom
bool	m_esMinus
bool	m_esPlus
bool	param_LogWeighted_
double	param_T0_barl_
double	param_T0_endc_
double	param_T0_endcPresh_
double	param_W0_
double	param_X0_

Detailed Description

Definition at line 29 of file PositionCalc.h.

Member Typedef Documentation

HitsAndEnergies

typedef std::vector<std::pair<DetId, double> > PositionCalc::HitsAndEnergies

Definition at line 32 of file PositionCalc.h.

HitsAndFractions

typedef std::vector<std::pair<DetId, float> > PositionCalc::HitsAndFractions

Definition at line 31 of file PositionCalc.h.

Constructor & Destructor Documentation

PositionCalc() [1/2]

PositionCalc::PositionCalc

(

const edm::ParameterSet &

par

)

Definition at line 4 of file PositionCalc.cc.

    : param_LogWeighted_(par.getParameter<bool>("LogWeighted")),
      param_T0_barl_(par.getParameter<double>("T0_barl")),
      param_T0_endc_(par.getParameter<double>("T0_endc")),
      param_T0_endcPresh_(par.getParameter<double>("T0_endcPresh")),
      param_W0_(par.getParameter<double>("W0")),
      param_X0_(par.getParameter<double>("X0")),
      m_esGeom(nullptr),
      m_esPlus(false),
      m_esMinus(false) {}

PositionCalc() [2/2]

PositionCalc::PositionCalc ( )

inline

Definition at line 37 of file PositionCalc.h.

{};

Member Function Documentation

Calculate_Location()

template<typename HitType >

math::XYZPoint PositionCalc::Calculate_Location	(	const HitsAndFractions &	iDetIds,
		const edm::SortedCollection< HitType > *	iRecHits,
		const CaloSubdetectorGeometry *	iSubGeom,
		const CaloSubdetectorGeometry *	iESGeom = nullptr
	)

Definition at line 65 of file PositionCalc.h.

References hcalRecHitTable_cff::depth, EcalBarrel, cosmicPhotonAnalyzer_cfi::eMax, edm::SortedCollection< T, SORT >::empty(), edm::SortedCollection< T, SORT >::end(), hcalRecHitTable_cff::energy, Exception, edm::SortedCollection< T, SORT >::find(), DivergingColor::frac, CaloSubdetectorGeometry::getGeometry(), CaloSubdetectorGeometry::getValidDetIds(), dqmiolumiharvest::j, dqm-mbProfile::log, LogDebug, m_esGeom, m_esMinus, m_esPlus, SiStripPI::max, HLT_2023v12_cff::maxDepth, dqmiodumpmetadata::n, DetId::null(), param_LogWeighted_, param_T0_barl_, param_T0_endc_, param_T0_endcPresh_, param_W0_, param_X0_, DetId::subdetId(), mps_merge::weight, z, and zw().

Referenced by DQMSourcePi0::analyze(), HybridClusterAlgo::e2Et(), HybridClusterAlgo::et25(), PhotonProducer::fillPhotonCollection(), Multi5x5ClusterAlgo::mainSearch(), HybridClusterAlgo::mainSearch(), IslandClusterAlgo::makeCluster(), CosmicClusterAlgo::makeCluster(), Multi5x5ClusterAlgo::makeCluster(), EgammaHLTNxNClusterProducer::makeNxNClusters(), PiZeroAnalyzer::makePizero(), and ecaldqm::PiZeroTask::runOnEBRecHits().

                                                                                        {
  typedef edm::SortedCollection<HitType> HitTypeCollection;
  math::XYZPoint returnValue(0, 0, 0);

  // Throw an error if the cluster was not initialized properly

  if (nullptr == iRecHits || nullptr == iSubGeom) {
    throw cms::Exception("PositionCalc") << "Calculate_Location() called uninitialized or wrong initialization.";
  }

  if (!iDetIds.empty() && !iRecHits->empty()) {
    HitsAndEnergies detIds;
    detIds.reserve(iDetIds.size());

    double eTot(0);
    double eMax(0);
    DetId maxId;

    // Check that DetIds are nonzero
    typename HitTypeCollection::const_iterator endRecHits(iRecHits->end());
    HitsAndFractions::const_iterator n, endDiDs(iDetIds.end());
    for (n = iDetIds.begin(); n != endDiDs; ++n) {
      const DetId dId((*n).first);
      const float frac((*n).second);
      if (!dId.null()) {
        typename HitTypeCollection::const_iterator iHit(iRecHits->find(dId));
        if (iHit != endRecHits) {
          const double energy(iHit->energy() * frac);
          detIds.push_back(std::make_pair(dId, energy));
          if (0.0 < energy) {  // only save positive energies
            if (eMax < energy) {
              eMax = energy;
              maxId = dId;
            }
            eTot += energy;
          }
        }
      }
    }

    if (0.0 >= eTot) {
      LogDebug("ZeroClusterEnergy") << "cluster with 0 energy: " << eTot << " size: " << detIds.size()
                                    << " , returning (0,0,0)";
    } else {
      // first time or when es geom changes set flags
      if (nullptr != iESGeom && m_esGeom != iESGeom) {
        m_esGeom = iESGeom;
        for (uint32_t ic(0); (ic != m_esGeom->getValidDetIds().size()) && ((!m_esPlus) || (!m_esMinus)); ++ic) {
          const double z(m_esGeom->getGeometry(m_esGeom->getValidDetIds()[ic])->getPosition().z());
          m_esPlus = m_esPlus || (0 < z);
          m_esMinus = m_esMinus || (0 > z);
        }
      }

      //Select the correct value of the T0 parameter depending on subdetector
      auto center_cell(iSubGeom->getGeometry(maxId));
      const double ctreta(center_cell->getPosition().eta());

      // for barrel, use barrel T0;
      // for endcap: if preshower present && in preshower fiducial,
      //             use preshower T0
      // else use endcap only T0
      const double preshowerStartEta = 1.653;
      const int subdet = maxId.subdetId();
      const double T0(subdet == EcalBarrel ? param_T0_barl_
                                           : (((preshowerStartEta < fabs(ctreta)) &&
                                               (((0 < ctreta) && m_esPlus) || ((0 > ctreta) && m_esMinus)))
                                                  ? param_T0_endcPresh_
                                                  : param_T0_endc_));

      // Calculate shower depth
      const float maxDepth(param_X0_ * (T0 + log(eTot)));
      const float maxToFront(center_cell->getPosition().mag());  // to front face

      // Loop over hits and get weights
      double total_weight = 0;
      const double eTot_inv = 1.0 / eTot;
      const double logETot_inv = (param_LogWeighted_ ? log(eTot_inv) : 0);

      double xw(0);
      double yw(0);
      double zw(0);

      HitsAndEnergies::const_iterator j, hAndE_end = detIds.end();
      for (j = detIds.begin(); j != hAndE_end; ++j) {
        const DetId dId((*j).first);
        const double e_j((*j).second);

        double weight = 0;
        if (param_LogWeighted_) {
          if (e_j > 0.0) {
            weight = std::max(0., param_W0_ + log(e_j) + logETot_inv);
          } else {
            weight = 0;
          }
        } else {
          weight = e_j * eTot_inv;
        }

        auto cell(iSubGeom->getGeometry(dId));
        const float depth(maxDepth + maxToFront - cell->getPosition().mag());

        const GlobalPoint pos(cell->getPosition(depth));

        xw += weight * pos.x();
        yw += weight * pos.y();
        zw += weight * pos.z();

        total_weight += weight;
      }
      returnValue = math::XYZPoint(xw / total_weight, yw / total_weight, zw / total_weight);
    }
  }
  return returnValue;
}

operator=()

const PositionCalc & PositionCalc::operator=

(

const PositionCalc &

rhs

)

Definition at line 15 of file PositionCalc.cc.

References m_esGeom, m_esMinus, m_esPlus, param_LogWeighted_, param_T0_barl_, param_T0_endc_, param_T0_endcPresh_, param_W0_, and param_X0_.

                                                                   {
  param_LogWeighted_ = rhs.param_LogWeighted_;
  param_T0_barl_ = rhs.param_T0_barl_;
  param_T0_endc_ = rhs.param_T0_endc_;
  param_T0_endcPresh_ = rhs.param_T0_endcPresh_;
  param_W0_ = rhs.param_W0_;
  param_X0_ = rhs.param_X0_;

  m_esGeom = rhs.m_esGeom;
  m_esPlus = rhs.m_esPlus;
  m_esMinus = rhs.m_esMinus;
  return *this;
}

Member Data Documentation

m_esGeom

const CaloSubdetectorGeometry* PositionCalc::m_esGeom

private

Definition at line 59 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

m_esMinus

bool PositionCalc::m_esMinus

private

Definition at line 61 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

m_esPlus

bool PositionCalc::m_esPlus

private

Definition at line 60 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_LogWeighted_

bool PositionCalc::param_LogWeighted_

private

Definition at line 52 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_T0_barl_

double PositionCalc::param_T0_barl_

private

Definition at line 53 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_T0_endc_

double PositionCalc::param_T0_endc_

private

Definition at line 54 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_T0_endcPresh_

double PositionCalc::param_T0_endcPresh_

private

Definition at line 55 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_W0_

double PositionCalc::param_W0_

private

Definition at line 56 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().

param_X0_

double PositionCalc::param_X0_

private

Definition at line 57 of file PositionCalc.h.

Referenced by Calculate_Location(), and operator=().