L1MuonSeedsMerger Class Reference

#include <L1MuonSeedsMerger.h>

Classes
struct	Less

Public Types
typedef std::pair< const reco::Track *, SeedingHitSet >	TrackAndHits
typedef std::vector< TrackAndHits >	TracksAndHits

Public Member Functions
	L1MuonSeedsMerger (const edm::ParameterSet &cfg)
virtual void	resolve (TracksAndHits &) const
virtual	~L1MuonSeedsMerger ()

Private Types
enum	Action { goAhead, killFirst, killSecond, mergeTwo }

Private Member Functions
Action	compare (const TrackAndHits *, const TrackAndHits *) const
const TrackAndHits *	merge (const TrackAndHits *, const TrackAndHits *) const

Private Attributes
float	theDeltaEtaCut
float	theDiffRelPtCut

Detailed Description

Definition at line 12 of file L1MuonSeedsMerger.h.

Member Typedef Documentation

typedef std::pair<const reco::Track*, SeedingHitSet> L1MuonSeedsMerger::TrackAndHits

Definition at line 14 of file L1MuonSeedsMerger.h.

typedef std::vector<TrackAndHits> L1MuonSeedsMerger::TracksAndHits

Definition at line 15 of file L1MuonSeedsMerger.h.

Member Enumeration Documentation

enum L1MuonSeedsMerger::Action

private

Enumerator
goAhead
killFirst
killSecond
mergeTwo

Definition at line 21 of file L1MuonSeedsMerger.h.

{ goAhead, killFirst, killSecond, mergeTwo };

Constructor & Destructor Documentation

L1MuonSeedsMerger::L1MuonSeedsMerger

(

const edm::ParameterSet &

cfg

)

Definition at line 6 of file L1MuonSeedsMerger.cc.

References edm::ParameterSet::getParameter(), theDeltaEtaCut, and theDiffRelPtCut.

                                                               {
  theDeltaEtaCut = cfg.getParameter<double>("deltaEtaCut");
  theDiffRelPtCut = cfg.getParameter<double>("diffRelPtCut");
}

virtual L1MuonSeedsMerger::~L1MuonSeedsMerger ( )

inlinevirtual

Definition at line 17 of file L1MuonSeedsMerger.h.

{}

Member Function Documentation

L1MuonSeedsMerger::Action L1MuonSeedsMerger::compare ( const TrackAndHits *  a, const TrackAndHits *  b  ) const

private

Definition at line 61 of file L1MuonSeedsMerger.cc.

References goAhead, killFirst, killSecond, SeedingHitSet::size(), and theDiffRelPtCut.

Referenced by resolve().

                                                                                                     {
  int nshared = 0;
  const SeedingHitSet& hitsA = a->second;
  const SeedingHitSet& hitsB = b->second;
  for (unsigned int iHitA = 0, nHitsA = hitsA.size(); iHitA < nHitsA; ++iHitA) {
    const TrackingRecHit* trhA = hitsA[iHitA]->hit();
    for (unsigned int iHitB = 0, nHitsB = hitsB.size(); iHitB < nHitsB; ++iHitB) {
      const TrackingRecHit* trhB = hitsB[iHitB]->hit();
      if (trhA == trhB)
        nshared++;
    }
  }

  if (nshared >= 2) {
    if (hitsA.size() >= 3 && hitsB.size() >= 3)
      return (a->first->chi2() > b->first->chi2()) ? killFirst : killSecond;
    else if (hitsB.size() >= 3)
      return killFirst;
    else
      return killSecond;
  } else if (nshared >= 1) {
    if (hitsA.size() != hitsB.size())
      return (hitsA.size() < hitsB.size()) ? killFirst : killSecond;
    else if (hitsA.size() >= 3 && a->first->charge() == b->first->charge() &&
             fabs(a->first->pt() - b->first->pt()) / b->first->pt() < theDiffRelPtCut)
      return (a->first->chi2() > b->first->chi2()) ? killFirst : killSecond;
    else if (hitsA.size() == 2)
      return (a->first->pt() < b->first->pt()) ? killFirst : killSecond;
    else
      return goAhead;
  } else
    return goAhead;
}

const L1MuonSeedsMerger::TrackAndHits * L1MuonSeedsMerger::merge ( const TrackAndHits *  a, const TrackAndHits *  b  ) const

private

Definition at line 50 of file L1MuonSeedsMerger.cc.

References a, and b.

Referenced by resolve().

                                                                                                                {
  // temporary algorith, takes track with bigger pt, to be reimplemented
  if (a->first->pt() > b->first->pt()) {
    delete b->first;
    return a;
  } else {
    delete a->first;
    return b;
  }
}

void L1MuonSeedsMerger::resolve ( TracksAndHits &  ) const

virtual

Definition at line 11 of file L1MuonSeedsMerger.cc.

References compare(), goAhead, killFirst, killSecond, merge(), mergeTwo, and theDeltaEtaCut.

                                                                     {
  sort(tracks.begin(), tracks.end(), Less());
  typedef std::vector<TrackAndHits>::iterator Tracks_Itr;
  Tracks_Itr it1 = tracks.begin();
  while (it1 != tracks.end()) {
    for (Tracks_Itr it2 = it1 + 1; it1->first && it2 < tracks.end(); it2++) {
      if (!it2->first)
        continue;
      if (it2->first->eta() - it1->first->eta() > theDeltaEtaCut)
        break;
      switch (compare(&(*it1), &(*it2))) {
        case killFirst:
          delete it1->first;
          it1->first = nullptr;
          break;
        case killSecond:
          delete it2->first;
          it2->first = nullptr;
          break;
        case mergeTwo:
          *it2 = *(merge(&(*it1), &(*it2)));
          it1->first = nullptr;
          break;
        case goAhead:
        default:
          break;
      }
    }
    if (nullptr == it1->first)
      tracks.erase(it1);
    else
      it1++;
  }
}

Member Data Documentation

float L1MuonSeedsMerger::theDeltaEtaCut

private

Definition at line 29 of file L1MuonSeedsMerger.h.

Referenced by L1MuonSeedsMerger(), and resolve().

float L1MuonSeedsMerger::theDiffRelPtCut

private

Definition at line 30 of file L1MuonSeedsMerger.h.

Referenced by compare(), and L1MuonSeedsMerger().