PixelTrackCleanerBySharedHits Class Reference

#include <PixelTrackCleanerBySharedHits.h>

Inheritance diagram for PixelTrackCleanerBySharedHits:

Public Types
using	TracksWithTTRHs = pixeltrackfitting::TracksWithTTRHs
using	TrackWithTTRHs = pixeltrackfitting::TrackWithTTRHs
Public Types inherited from PixelTrackCleaner
using	Record = TrajectoryFilter::Record
typedef pixeltrackfitting::TracksWithRecHits	TracksWithRecHits
using	TracksWithTTRHs = pixeltrackfitting::TracksWithTTRHs

Public Member Functions
void	cleanTracks (TracksWithTTRHs &tracksWithRecHits) const override
	PixelTrackCleanerBySharedHits (bool useQuadrupletAlgo)
	~PixelTrackCleanerBySharedHits () override
Public Member Functions inherited from PixelTrackCleaner
virtual TracksWithRecHits	cleanTracks (const TracksWithRecHits &tracksWithRecHits) const
bool	fast () const
virtual	~PixelTrackCleaner ()

Private Attributes
const bool	useQuadrupletAlgo_

Additional Inherited Members
Protected Member Functions inherited from PixelTrackCleaner
	PixelTrackCleaner (bool fast=false)

Detailed Description

Definition at line 17 of file PixelTrackCleanerBySharedHits.h.

Member Typedef Documentation

using PixelTrackCleanerBySharedHits::TracksWithTTRHs = pixeltrackfitting::TracksWithTTRHs

Definition at line 25 of file PixelTrackCleanerBySharedHits.h.

using PixelTrackCleanerBySharedHits::TrackWithTTRHs = pixeltrackfitting::TrackWithTTRHs

Definition at line 24 of file PixelTrackCleanerBySharedHits.h.

Constructor & Destructor Documentation

PixelTrackCleanerBySharedHits::PixelTrackCleanerBySharedHits

(

bool

useQuadrupletAlgo

)

Definition at line 14 of file PixelTrackCleanerBySharedHits.cc.

                                                                                  :
  PixelTrackCleaner(true), // to mark this as fast algo
  useQuadrupletAlgo_(useQuadrupletAlgo)
{}

PixelTrackCleanerBySharedHits::~PixelTrackCleanerBySharedHits ( )

override

Definition at line 19 of file PixelTrackCleanerBySharedHits.cc.

{}

Member Function Documentation

void PixelTrackCleanerBySharedHits::cleanTracks ( TracksWithTTRHs &  tracksWithRecHits ) const

overridevirtual

Reimplemented from PixelTrackCleaner.

Definition at line 23 of file PixelTrackCleanerBySharedHits.cc.

References connectstrParser::f2, plotBeamSpotDB::first, mps_fire::i, gen::k, LogDebug, min(), indexGen::s2, offlineSlimmedPrimaryVertices_cfi::score, edm::second(), findQualityFiles::size, mitigatedMETSequence_cff::U, useQuadrupletAlgo_, and findQualityFiles::v.

{

  LogDebug("PixelTrackCleanerBySharedHits") << "Cleanering tracks" << "\n";
  unsigned int size = trackHitPairs.size();
  if (size <= 1) return;

  // sort (stabilize cleaning)
  uint16_t score[size]; 
  unsigned int ind[size];
  for (auto i = 0U; i < size; ++i) {
     ind[i]=i; 
     score[i]= 32000-std::min(32000, int(trackHitPairs[i].first->chi2()*100.f));  // chi2: smaller is better
     if (trackHitPairs[i].second.size()==4) score[i]+=32001; //  s4 always better than s3
  }
  std::sort(ind,ind+size,[&](unsigned int i, unsigned int j){return score[i]>score[j];});

  auto kill = [&](unsigned int k) {delete trackHitPairs[k].first; trackHitPairs[k].first=nullptr;};

  // sorted: first is always better!

  // first loop: only first    two hits....
  for (auto i = 0U; i < size; ++i) {
    auto iTrack1 = ind[i];
    auto track1 = trackHitPairs[iTrack1].first;
    if (!track1) continue;
    auto const & recHits1 = trackHitPairs[iTrack1].second;
    for (auto j = i+1; j < size; ++j) {
      auto iTrack2 = ind[j];
      auto track2 = trackHitPairs[iTrack2].first;
      if (!track2) continue;
      auto const & recHits2 = trackHitPairs[iTrack2].second;
      if (recHits1[0] != recHits2[0]) continue; 
      if (recHits1[1] != recHits2[1]) continue;
      kill(iTrack2);    
    }  // tk2
  } // tk1


  // second loop: first and third hits....
  for (auto i = 0U; i < size; ++i) {
    auto iTrack1 = ind[i];
    auto track1 = trackHitPairs[iTrack1].first;
    if (!track1) continue;
    auto const & recHits1 = trackHitPairs[iTrack1].second;
    if (recHits1.size()<3) continue;
    for (auto j = i+1; j < size; ++j) {
      auto iTrack2 = ind[j];
      auto track2 = trackHitPairs[iTrack2].first;
      if (!track2) continue;
      auto const & recHits2 = trackHitPairs[iTrack2].second;
      if (recHits2.size()<3) continue;
      if (recHits1[0] != recHits2[0]) continue;
      if (recHits1[2] != recHits2[2]) continue;
      kill(iTrack2);
    }  // tk2
  } // tk1


  // final loop: all the rest
  for (auto i = 0U; i < size; ++i) {
    auto iTrack1 = ind[i];
    auto track1 = trackHitPairs[iTrack1].first;
    if (!track1) continue;
    auto const & recHits1 = trackHitPairs[iTrack1].second;
    auto s1 = recHits1.size();
    for (auto j = i+1; j < size; ++j) {
      auto iTrack2 = ind[j];
      auto track2 = trackHitPairs[iTrack2].first;
      if (!track2) continue;
      auto const & recHits2 = trackHitPairs[iTrack2].second;
      auto s2 = recHits2.size();
      auto commonRecHits = 0U;
      auto f2=0U;
      for (auto iRecHit1 = 0U; iRecHit1 < s1; ++iRecHit1) {
        for (auto iRecHit2 = f2; iRecHit2 < s2; ++iRecHit2) {
          if (recHits1[iRecHit1] == recHits2[iRecHit2]) { ++commonRecHits; f2=iRecHit2+1; break;} // if a hit is common, no other can be the same!
        }
    if (commonRecHits > 1) break;
      }
      if(useQuadrupletAlgo_) {
        if(commonRecHits >= 1) {
          if(s1 == 3 || commonRecHits > 1) { kill(iTrack2); }
        }
      }
      else if (commonRecHits > 1) {
       kill(iTrack2);
      }
    } // tk2
  }  //tk1

  trackHitPairs.erase(std::remove_if(trackHitPairs.begin(),trackHitPairs.end(),[&](TrackWithTTRHs & v){ return nullptr==v.first;}),trackHitPairs.end());
}

Member Data Documentation

const bool PixelTrackCleanerBySharedHits::useQuadrupletAlgo_

private

Definition at line 29 of file PixelTrackCleanerBySharedHits.h.

Referenced by cleanTracks().