CAHitQuadrupletGenerator Class Reference

#include <CAHitQuadrupletGenerator.h>

Classes
class	QuantityDependsPt
class	QuantityDependsPtEval

Public Types
typedef LayerHitMapCache	LayerCacheType
typedef OrderedHitSeeds	ResultType

Public Member Functions
	CAHitQuadrupletGenerator (const edm::ParameterSet &cfg, edm::ConsumesCollector &&iC)
	CAHitQuadrupletGenerator (const edm::ParameterSet &cfg, edm::ConsumesCollector &iC)
void	hitNtuplets (const IntermediateHitDoublets &regionDoublets, std::vector< OrderedHitSeeds > &result, const edm::EventSetup &es, const SeedingLayerSetsHits &layers)
void	initEvent (const edm::Event &ev, const edm::EventSetup &es)
	~CAHitQuadrupletGenerator ()=default

Static Public Member Functions
static void	fillDescriptions (edm::ParameterSetDescription &desc)
static const char *	fillDescriptionsLabel ()

Static Public Attributes
static constexpr unsigned int	minLayers = 4

Private Attributes
const float	caHardPtCut = 0.f
const float	caPhiCut = 0.1f
const float	caThetaCut = 0.00125f
const float	extraHitRPhitolerance
const bool	fitFastCircle
const bool	fitFastCircleChi2Cut
const QuantityDependsPt	maxChi2
std::unique_ptr< SeedComparitor >	theComparitor
LayerCacheType	theLayerCache
const bool	useBendingCorrection

Detailed Description

Definition at line 29 of file CAHitQuadrupletGenerator.h.

Member Typedef Documentation

LayerCacheType

typedef LayerHitMapCache CAHitQuadrupletGenerator::LayerCacheType

Definition at line 31 of file CAHitQuadrupletGenerator.h.

ResultType

typedef OrderedHitSeeds CAHitQuadrupletGenerator::ResultType

Definition at line 34 of file CAHitQuadrupletGenerator.h.

Constructor & Destructor Documentation

CAHitQuadrupletGenerator() [1/2]

CAHitQuadrupletGenerator::CAHitQuadrupletGenerator ( const edm::ParameterSet &  cfg, edm::ConsumesCollector &&  iC  )

inline

Definition at line 38 of file CAHitQuadrupletGenerator.h.

: CAHitQuadrupletGenerator(cfg, iC) {}

CAHitQuadrupletGenerator() [2/2]

CAHitQuadrupletGenerator::CAHitQuadrupletGenerator	(	const edm::ParameterSet &	cfg,
		edm::ConsumesCollector &	iC
	)

Definition at line 27 of file CAHitQuadrupletGenerator.cc.

    : extraHitRPhitolerance(cfg.getParameter<double>(
          "extraHitRPhitolerance")),  //extra window in ThirdHitPredictionFromCircle range (divide by R to get phi)
      maxChi2(cfg.getParameter<edm::ParameterSet>("maxChi2")),
      fitFastCircle(cfg.getParameter<bool>("fitFastCircle")),
      fitFastCircleChi2Cut(cfg.getParameter<bool>("fitFastCircleChi2Cut")),
      useBendingCorrection(cfg.getParameter<bool>("useBendingCorrection")),
      caThetaCut(cfg.getParameter<double>("CAThetaCut")),
      caPhiCut(cfg.getParameter<double>("CAPhiCut")),
      caHardPtCut(cfg.getParameter<double>("CAHardPtCut")) {
  edm::ParameterSet comparitorPSet = cfg.getParameter<edm::ParameterSet>("SeedComparitorPSet");
  std::string comparitorName = comparitorPSet.getParameter<std::string>("ComponentName");
  if (comparitorName != "none") {
    theComparitor = SeedComparitorFactory::get()->create(comparitorName, comparitorPSet, iC);
  }
}

References looper::cfg, get, edm::ParameterSet::getParameter(), AlCaHLTBitMon_QueryRunRegistry::string, and theComparitor.

~CAHitQuadrupletGenerator()

CAHitQuadrupletGenerator::~CAHitQuadrupletGenerator ( )

default

Member Function Documentation

fillDescriptions()

void CAHitQuadrupletGenerator::fillDescriptions ( edm::ParameterSetDescription &  desc )

static

Definition at line 44 of file CAHitQuadrupletGenerator.cc.

                                                                                {
  desc.add<double>("extraHitRPhitolerance", 0.1);
  desc.add<bool>("fitFastCircle", false);
  desc.add<bool>("fitFastCircleChi2Cut", false);
  desc.add<bool>("useBendingCorrection", false);
  desc.add<double>("CAThetaCut", 0.00125);
  desc.add<double>("CAPhiCut", 10);
  desc.add<double>("CAHardPtCut", 0);
  desc.addOptional<bool>("CAOnlyOneLastHitPerLayerFilter")
      ->setComment(
          "Deprecated and has no effect. To be fully removed later when the parameter is no longer used in HLT "
          "configurations.");
  edm::ParameterSetDescription descMaxChi2;
  descMaxChi2.add<double>("pt1", 0.2);
  descMaxChi2.add<double>("pt2", 1.5);
  descMaxChi2.add<double>("value1", 500);
  descMaxChi2.add<double>("value2", 50);
  descMaxChi2.add<bool>("enabled", true);
  desc.add<edm::ParameterSetDescription>("maxChi2", descMaxChi2);
 
  edm::ParameterSetDescription descComparitor;
  descComparitor.add<std::string>("ComponentName", "none");
  descComparitor.setAllowAnything();  // until we have moved SeedComparitor too to EDProducers
  desc.add<edm::ParameterSetDescription>("SeedComparitorPSet", descComparitor);
}

References edm::ParameterSetDescription::add(), edm::ParameterSetDescription::addOptional(), and AlCaHLTBitMon_QueryRunRegistry::string.

fillDescriptionsLabel()

static const char* CAHitQuadrupletGenerator::fillDescriptionsLabel ( )

inlinestatic

Definition at line 44 of file CAHitQuadrupletGenerator.h.

{ return "caHitQuadruplet"; }

hitNtuplets()

void CAHitQuadrupletGenerator::hitNtuplets	(	const IntermediateHitDoublets &	regionDoublets,
		std::vector< OrderedHitSeeds > &	result,
		const edm::EventSetup &	es,
		const SeedingLayerSetsHits &	layers
	)

Definition at line 146 of file CAHitQuadrupletGenerator.cc.

                                                                               {
  CAGraph g;
 
  std::vector<const HitDoublets*> hitDoublets;
 
  const int numberOfHitsInNtuplet = 4;
  std::vector<CACell::CAntuplet> foundQuadruplets;
 
  int index = 0;
  for (const auto& regionLayerPairs : regionDoublets) {
    const TrackingRegion& region = regionLayerPairs.region();
    hitDoublets.clear();
    foundQuadruplets.clear();
    if (index == 0) {
      createGraphStructure(layers, g);
    } else {
      clearGraphStructure(layers, g);
    }
 
    fillGraph(layers, regionLayerPairs, g, hitDoublets);
 
    CellularAutomaton ca(g);
 
    ca.createAndConnectCells(hitDoublets, region, caThetaCut, caPhiCut, caHardPtCut);
 
    ca.evolve(numberOfHitsInNtuplet);
 
    ca.findNtuplets(foundQuadruplets, numberOfHitsInNtuplet);
 
    auto& allCells = ca.getAllCells();
 
    const QuantityDependsPtEval maxChi2Eval = maxChi2.evaluator(es);
 
    // re-used thoughout
    std::array<float, 4> bc_r;
    std::array<float, 4> bc_z;
    std::array<float, 4> bc_errZ2;
    std::array<GlobalPoint, 4> gps;
    std::array<GlobalError, 4> ges;
    std::array<bool, 4> barrels;
 
    unsigned int numberOfFoundQuadruplets = foundQuadruplets.size();
 
    // Loop over quadruplets
    for (unsigned int quadId = 0; quadId < numberOfFoundQuadruplets; ++quadId) {
      auto isBarrel = [](const unsigned id) -> bool { return id == PixelSubdetector::PixelBarrel; };
      for (unsigned int i = 0; i < 3; ++i) {
        auto const& ahit = allCells[foundQuadruplets[quadId][i]].getInnerHit();
        gps[i] = ahit->globalPosition();
        ges[i] = ahit->globalPositionError();
        barrels[i] = isBarrel(ahit->geographicalId().subdetId());
      }
 
      auto const& ahit = allCells[foundQuadruplets[quadId][2]].getOuterHit();
      gps[3] = ahit->globalPosition();
      ges[3] = ahit->globalPositionError();
      barrels[3] = isBarrel(ahit->geographicalId().subdetId());
      // TODO:
      // - if we decide to always do the circle fit for 4 hits, we don't
      //   need ThirdHitPredictionFromCircle for the curvature; then we
      //   could remove extraHitRPhitolerance configuration parameter
      ThirdHitPredictionFromCircle predictionRPhi(gps[0], gps[2], extraHitRPhitolerance);
      const float curvature = predictionRPhi.curvature(ThirdHitPredictionFromCircle::Vector2D(gps[1].x(), gps[1].y()));
      const float abscurv = std::abs(curvature);
      const float thisMaxChi2 = maxChi2Eval.value(abscurv);
      if (theComparitor) {
        SeedingHitSet tmpTriplet(allCells[foundQuadruplets[quadId][0]].getInnerHit(),
                                 allCells[foundQuadruplets[quadId][2]].getInnerHit(),
                                 allCells[foundQuadruplets[quadId][2]].getOuterHit());
 
        if (!theComparitor->compatible(tmpTriplet)) {
          continue;
        }
      }
 
      float chi2 = std::numeric_limits<float>::quiet_NaN();
      // TODO: Do we have any use case to not use bending correction?
      if (useBendingCorrection) {
        // Following PixelFitterByConformalMappingAndLine
        const float simpleCot = (gps.back().z() - gps.front().z()) / (gps.back().perp() - gps.front().perp());
        const float pt = 1.f / PixelRecoUtilities::inversePt(abscurv, es);
        for (int i = 0; i < 4; ++i) {
          const GlobalPoint& point = gps[i];
          const GlobalError& error = ges[i];
          bc_r[i] = sqrt(sqr(point.x() - region.origin().x()) + sqr(point.y() - region.origin().y()));
          bc_r[i] += pixelrecoutilities::LongitudinalBendingCorrection(pt, es)(bc_r[i]);
          bc_z[i] = point.z() - region.origin().z();
          bc_errZ2[i] = (barrels[i]) ? error.czz() : error.rerr(point) * sqr(simpleCot);
        }
        RZLine rzLine(bc_r, bc_z, bc_errZ2, RZLine::ErrZ2_tag());
        chi2 = rzLine.chi2();
      } else {
        RZLine rzLine(gps, ges, barrels);
        chi2 = rzLine.chi2();
      }
      if (edm::isNotFinite(chi2) || chi2 > thisMaxChi2) {
        continue;
      }
      // TODO: Do we have any use case to not use circle fit? Maybe
      // HLT where low-pT inefficiency is not a problem?
      if (fitFastCircle) {
        FastCircleFit c(gps, ges);
        chi2 += c.chi2();
        if (edm::isNotFinite(chi2))
          continue;
        if (fitFastCircleChi2Cut && chi2 > thisMaxChi2)
          continue;
      }
      result[index].emplace_back(allCells[foundQuadruplets[quadId][0]].getInnerHit(),
                                 allCells[foundQuadruplets[quadId][1]].getInnerHit(),
                                 allCells[foundQuadruplets[quadId][2]].getInnerHit(),
                                 allCells[foundQuadruplets[quadId][2]].getOuterHit());
    }
    index++;
  }
}

References funct::abs(), HltBtagPostValidation_cff::c, caHardPtCut, caPhiCut, caThetaCut, hltPixelTracks_cff::chi2, RZLine::chi2(), CellularAutomaton::createAndConnectCells(), PixelRecoUtilities::curvature(), relativeConstraints::error, CAHitQuadrupletGenerator::QuantityDependsPt::evaluator(), CellularAutomaton::evolve(), extraHitRPhitolerance, CellularAutomaton::findNtuplets(), fitFastCircle, fitFastCircleChi2Cut, g, CellularAutomaton::getAllCells(), mps_fire::i, triggerObjects_cff::id, PixelRecoUtilities::inversePt(), PixelPluginsPhase0_cfi::isBarrel, edm::isNotFinite(), hgcalTopologyTester_cfi::layers, maxChi2, PixelSubdetector::PixelBarrel, point, DiDispStaMuonMonitor_cfi::pt, ihd::RegionLayerSets< T >::region(), HLT_2018_cff::region, mps_fire::result, sqr(), mathSSE::sqrt(), theComparitor, useBendingCorrection, CAHitQuadrupletGenerator::QuantityDependsPtEval::value(), x, and y.

initEvent()

void CAHitQuadrupletGenerator::initEvent	(	const edm::Event &	ev,
		const edm::EventSetup &	es
	)

Definition at line 70 of file CAHitQuadrupletGenerator.cc.

                                                                                    {
  if (theComparitor)
    theComparitor->init(ev, es);
}

References ev, and theComparitor.

Member Data Documentation

caHardPtCut

const float CAHitQuadrupletGenerator::caHardPtCut = 0.f

private

Definition at line 131 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

caPhiCut

const float CAHitQuadrupletGenerator::caPhiCut = 0.1f

private

Definition at line 130 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

caThetaCut

const float CAHitQuadrupletGenerator::caThetaCut = 0.00125f

private

Definition at line 129 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

extraHitRPhitolerance

const float CAHitQuadrupletGenerator::extraHitRPhitolerance

private

Definition at line 122 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

fitFastCircle

const bool CAHitQuadrupletGenerator::fitFastCircle

private

Definition at line 125 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

fitFastCircleChi2Cut

const bool CAHitQuadrupletGenerator::fitFastCircleChi2Cut

private

Definition at line 126 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

maxChi2

const QuantityDependsPt CAHitQuadrupletGenerator::maxChi2

private

Definition at line 124 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().

minLayers

constexpr unsigned int CAHitQuadrupletGenerator::minLayers = 4

staticconstexpr

Definition at line 33 of file CAHitQuadrupletGenerator.h.

theComparitor

std::unique_ptr<SeedComparitor> CAHitQuadrupletGenerator::theComparitor

private

Definition at line 56 of file CAHitQuadrupletGenerator.h.

Referenced by CAHitQuadrupletGenerator(), hitNtuplets(), and initEvent().

theLayerCache

LayerCacheType CAHitQuadrupletGenerator::theLayerCache

private

Definition at line 54 of file CAHitQuadrupletGenerator.h.

useBendingCorrection

const bool CAHitQuadrupletGenerator::useBendingCorrection

private

Definition at line 127 of file CAHitQuadrupletGenerator.h.

Referenced by hitNtuplets().