#include <DTMeantimerPatternReco.h>

Inheritance diagram for DTMeantimerPatternReco:

Public Member Functions
std::string	algoName () const override
	return the algo name More...

	DTMeantimerPatternReco (const edm::ParameterSet &pset)
	Constructor. More...

edm::OwnVector< DTSLRecSegment2D >	reconstruct (const DTSuperLayer *sl, const std::vector< DTRecHit1DPair > &hits) override
	this function is called in the producer More...

void	setES (const edm::EventSetup &setup) override

	~DTMeantimerPatternReco () override
	Destructor. More...

Public Member Functions inherited from DTRecSegment2DBaseAlgo
	DTRecSegment2DBaseAlgo (const edm::ParameterSet &)
	Constructor. More...

virtual	~DTRecSegment2DBaseAlgo ()
	Destructor. More...

Private Member Functions
void	addHits (DTSegmentCand segCand, const std::vector< std::shared_ptr< DTHitPairForFit >> &hits, std::vector< DTSegmentCand > &result)

std::vector< DTSegmentCand * >	buildSegments (const DTSuperLayer *sl, const std::vector< std::shared_ptr< DTHitPairForFit >> &hits)

bool	checkDoubleCandidates (std::vector< DTSegmentCand * > &segs, DTSegmentCand *seg)

DTSegmentCand *	fitWithT0 (DTSegmentCand *seg, const bool fitdebug)

bool	geometryFilter (const DTWireId first, const DTWireId second) const

std::vector< std::shared_ptr< DTHitPairForFit > >	initHits (const DTSuperLayer *sl, const std::vector< DTRecHit1DPair > &hits)

void	printPattern (std::vector< DTSegmentCand::AssPoint > &assHits, const DTHitPairForFit *hit)

Private Attributes
bool	debug

unsigned int	maxfound

std::string	theAlgoName

double	theAlphaMaxPhi

double	theAlphaMaxTheta

DTSegmentCleaner *	theCleaner

edm::ESHandle< DTGeometry >	theDTGeometry

DTLinearFit *	theFitter

unsigned int	theMaxAllowedHits

double	theMaxChi2

DTSegmentUpdator *	theUpdator

Friends
class	DTMeantimerPatternReco4D

Detailed Description

Algo for reconstructing 2d segment in DT using a combinatorial approach with a T0 estimation produced along the way

Author: Stefano Lacaprara - INFN Legnaro stefa.nosp@m.no.l.nosp@m.acapr.nosp@m.ara@.nosp@m.pd.in.nosp@m.fn.i.nosp@m.t; Riccardo Bellan - INFN TO ricca.nosp@m.rdo..nosp@m.bella.nosp@m.n@ce.nosp@m.rn.ch; Piotr Traczyk - SINS Warsaw ptrac.nosp@m.zyk@.nosp@m.fuw.e.nosp@m.du.p.nosp@m.l

Definition at line 43 of file DTMeantimerPatternReco.h.

Constructor & Destructor Documentation

DTMeantimerPatternReco::DTMeantimerPatternReco ( const edm::ParameterSet & pset )

Constructor.

Definition at line 38 of file DTMeantimerPatternReco.cc.

References debug, edm::ParameterSet::getParameter(), edm::ParameterSet::getUntrackedParameter(), theAlphaMaxPhi, theAlphaMaxTheta, theCleaner, theMaxAllowedHits, theMaxChi2, and theUpdator.

     : DTRecSegment2DBaseAlgo(pset), theFitter(new DTLinearFit()), theAlgoName("DTMeantimerPatternReco") {
   theMaxAllowedHits = pset.getParameter<unsigned int>("MaxAllowedHits");  // 100
   theAlphaMaxTheta = pset.getParameter<double>("AlphaMaxTheta");          // 0.1 ;
   theAlphaMaxPhi = pset.getParameter<double>("AlphaMaxPhi");              // 1.0 ;
   theMaxChi2 = pset.getParameter<double>("MaxChi2");                      // 8.0 ;
   debug = pset.getUntrackedParameter<bool>("debug");
   theUpdator = new DTSegmentUpdator(pset);
   theCleaner = new DTSegmentCleaner(pset);
 }

DTMeantimerPatternReco::~DTMeantimerPatternReco ( )

override

Destructor.

Definition at line 50 of file DTMeantimerPatternReco.cc.

References theCleaner, theFitter, and theUpdator.

                                                 {
   delete theUpdator;
   delete theCleaner;
   delete theFitter;
 }

Member Function Documentation

void DTMeantimerPatternReco::addHits	(	DTSegmentCand *	segCand,
		const std::vector< std::shared_ptr< DTHitPairForFit >> &	hits,
		std::vector< DTSegmentCand * > &	result
	)

private

Definition at line 186 of file DTMeantimerPatternReco.cc.

References DTSegmentCand::add(), checkDoubleCandidates(), DTSegmentCand::chi2(), gather_cfg::cout, debug, fitWithT0(), geometryFilter(), DTSegmentCand::good(), hfClusterShapes_cfi::hits, DTEnums::Left, maxfound, DTSegmentCand::nHits(), DTSegmentCand::removeHit(), groupFilesInBlocks::reverse, DTEnums::Right, and DTSegmentCand::t0().

Referenced by buildSegments().

                                                                      {
   double chi2l, chi2r, t0l, t0r;
   bool foundSomething = false;
 
   if (debug)
     cout << " DTMeantimerPatternReco::addHit " << endl
          << "   Picked " << segCand->nHits() << " hits, " << hits.size() << " left." << endl;
 
   if (segCand->nHits() + hits.size() < maxfound)
     return;
 
   // loop over the remaining hits
   for (hitCont::const_iterator hit = hits.begin(); hit != hits.end(); ++hit) {
     //    if (debug) {
     //      cout << "     Trying B: " << **hit<< " wire: " << (*hit)->id() << endl;
     //      printPattern(assHits,*hit);
     //    }
 
     DTSegmentCand::AssPoint lhit(*hit, DTEnums::Left);
     DTSegmentCand::AssPoint rhit(*hit, DTEnums::Right);
 
     segCand->add(lhit);
     bool left_ok = (fitWithT0(segCand, false) ? true : false);
     chi2l = segCand->chi2();
     t0l = segCand->t0();
     segCand->removeHit(lhit);
 
     segCand->add(rhit);
     bool right_ok = (fitWithT0(segCand, false) ? true : false);
     chi2r = segCand->chi2();
     t0r = segCand->t0();
     segCand->removeHit(rhit);
 
     if (debug) {
       int nHits = segCand->nHits() + 1;
       cout << "    Left:  t0= " << t0l << "  chi2/nHits= " << chi2l << "/" << nHits << "  ok: " << left_ok << endl;
       cout << "   Right:  t0= " << t0r << "  chi2/nHits= " << chi2r << "/" << nHits << "  ok: " << right_ok << endl;
     }
 
     if (!left_ok && !right_ok)
       continue;
 
     foundSomething = true;
 
     // prepare the hit set for the next search, start from the other side
     hitCont hitsForFit;
     for (hitCont::const_iterator tmpHit = hit + 1; tmpHit != hits.end(); tmpHit++)
       if (geometryFilter((*tmpHit)->id(), (*hit)->id()))
         hitsForFit.push_back(*tmpHit);
 
     reverse(hitsForFit.begin(), hitsForFit.end());
 
     // choose only one - left or right
     if (segCand->nHits() > 3 && left_ok && right_ok) {
       if (chi2l < chi2r - 0.1)
         right_ok = false;
       else if (chi2r < chi2l - 0.1)
         left_ok = false;
     }
 
     if (left_ok) {
       segCand->add(lhit);
       addHits(segCand, hitsForFit, result);
       segCand->removeHit(lhit);
     }
 
     if (right_ok) {
       segCand->add(rhit);
       addHits(segCand, hitsForFit, result);
       segCand->removeHit(rhit);
     }
   }
 
   if (foundSomething)
     return;
   // if we didn't find any new hits compatible with the current candidate, we proceed to check and store the candidate
 
   // If we already have a segment with more hits from this hit pair - don't save this one.
   if (segCand->nHits() < maxfound)
     return;
 
   // Check if semgent Ok, calculate chi2
   bool seg_ok = (fitWithT0(segCand, debug) ? true : false);
   if (!seg_ok)
     return;
 
   if (!segCand->good()) {
     //    if (debug) cout << "   Segment not good() - skipping" << endl;
     return;
   }
 
   if (segCand->nHits() > maxfound)
     maxfound = segCand->nHits();
   if (debug)
     cout << endl << "   Seg t0= " << segCand->t0() << endl << *segCand << endl;
 
   if (checkDoubleCandidates(result, segCand)) {
     result.push_back(new DTSegmentCand(*segCand));
     if (debug)
       cout << "   Result is now " << result.size() << endl;
   } else {
     if (debug)
       cout << "   Exists - skipping" << endl;
   }
 }

std::string DTMeantimerPatternReco::algoName ( ) const

inlineoverridevirtual

return the algo name

Implements DTRecSegment2DBaseAlgo.

Definition at line 58 of file DTMeantimerPatternReco.h.

References singleTopDQM_cfi::setup.

58 { return theAlgoName; }

DTMeantimerPatternReco::theAlgoName

std::string theAlgoName

Definition: DTMeantimerPatternReco.h:96

vector< DTSegmentCand * > DTMeantimerPatternReco::buildSegments	(	const DTSuperLayer *	sl,
		const std::vector< std::shared_ptr< DTHitPairForFit >> &	hits
	)

private

Definition at line 94 of file DTMeantimerPatternReco.cc.

References addHits(), DTSegmentCleaner::clean(), gather_cfg::cout, debug, geometryFilter(), hfClusterShapes_cfi::hits, DTSuperLayer::id(), hit::id, listHistos::IP, DTEnums::Left, maxfound, mps_fire::result, DTEnums::Right, theAlphaMaxPhi, theAlphaMaxTheta, theCleaner, theMaxAllowedHits, PV3DBase< T, PVType, FrameType >::theta(), and GeomDet::toGlobal().

Referenced by DTMeantimerPatternReco4D::buildPhiSuperSegmentsCandidates(), and reconstruct().

                                                                                    {
   vector<DTSegmentCand*> result;
   DTEnums::DTCellSide codes[2] = {DTEnums::Left, DTEnums::Right};
 
   if (debug) {
     cout << "buildSegments: " << sl->id() << " nHits " << hits.size() << endl;
     for (hitIter hit = hits.begin(); hit != hits.end(); ++hit)
       cout << **hit << " wire: " << (*hit)->id() << " DigiTime: " << (*hit)->digiTime() << endl;
   }
 
   if (hits.size() > theMaxAllowedHits) {
     if (debug) {
       cout << "Warning: this SuperLayer " << sl->id() << " has too many hits : " << hits.size() << " max allowed is "
            << theMaxAllowedHits << endl;
       cout << "Skipping segment reconstruction... " << endl;
     }
     return result;
   }
 
   GlobalPoint IP;
   float DAlphaMax;
   if ((sl->id()).superlayer() == 2)  // Theta SL
     DAlphaMax = theAlphaMaxTheta;
   else  // Phi SL
     DAlphaMax = theAlphaMaxPhi;
 
   // get two hits in different layers and see if there are other hits
   //  compatible with them
   for (hitCont::const_iterator firstHit = hits.begin(); firstHit != hits.end(); ++firstHit) {
     for (hitCont::const_reverse_iterator lastHit = hits.rbegin(); (*lastHit) != (*firstHit); ++lastHit) {
       // a geometrical sensibility cut for the two hits
       if (!geometryFilter((*firstHit)->id(), (*lastHit)->id()))
         continue;
 
       // create a set of hits for the fit (only the hits between the two selected ones)
       hitCont hitsForFit;
       for (hitCont::const_iterator tmpHit = firstHit + 1; (*tmpHit) != (*lastHit); tmpHit++)
         if ((geometryFilter((*tmpHit)->id(), (*lastHit)->id())) && (geometryFilter((*tmpHit)->id(), (*firstHit)->id())))
           hitsForFit.push_back(*tmpHit);
 
       for (int firstLR = 0; firstLR < 2; ++firstLR) {
         for (int lastLR = 0; lastLR < 2; ++lastLR) {
           // TODO move the global transformation in the DTHitPairForFit class
           // when it will be moved I will able to remove the sl from the input parameter
           GlobalPoint gposFirst = sl->toGlobal((*firstHit)->localPosition(codes[firstLR]));
           GlobalPoint gposLast = sl->toGlobal((*lastHit)->localPosition(codes[lastLR]));
           GlobalVector gvec = gposLast - gposFirst;
           GlobalVector gvecIP = gposLast - IP;
 
           // difference in angle measured
           float DAlpha = fabs(gvec.theta() - gvecIP.theta());
           if (DAlpha > DAlphaMax)
             continue;
 
           //      if(debug) {
           //              cout << "Selected hit pair:" << endl;
           //              cout << "  First " << *(*firstHit) << " Layer Id: " << (*firstHit)->id().layerId() << " Side: " << firstLR << " DigiTime: " << (*firstHit)->digiTime() << endl;
           //              cout << "  Last "  << *(*lastHit)  << " Layer Id: " << (*lastHit)->id().layerId()  << " Side: " << lastLR << " DigiTime: " << (*lastHit)->digiTime() <<  endl;
           //          }
 
           DTSegmentCand::AssPointCont pointSet;
           auto segCand = std::make_unique<DTSegmentCand>(pointSet, sl);
           segCand->add(*firstHit, codes[firstLR]);
           segCand->add(*lastHit, codes[lastLR]);
 
           // run hit adding/segment building
           maxfound = 3;
           addHits(segCand.get(), hitsForFit, result);
         }
       }
     }
   }
 
   // now I have a couple of segment hypotheses, should check for ghosts
   if (debug) {
     cout << "Result (before cleaning): " << result.size() << endl;
     for (vector<DTSegmentCand*>::const_iterator seg = result.begin(); seg != result.end(); ++seg)
       cout << *(*seg) << endl;
   }
 
   result = theCleaner->clean(result);
 
   if (debug) {
     cout << "Result (after cleaning): " << result.size() << endl;
     for (vector<DTSegmentCand*>::const_iterator seg = result.begin(); seg != result.end(); ++seg)
       cout << *(*seg) << endl;
   }
 
   return result;
 }

bool DTMeantimerPatternReco::checkDoubleCandidates	(	std::vector< DTSegmentCand * > &	segs,
		DTSegmentCand *	seg
	)

private

Definition at line 360 of file DTMeantimerPatternReco.cc.

References DTSegmentCand::chi2ndof(), createfilelist::int, and DTSegmentCand::nHits().

Referenced by addHits().

                                                                                                     {
   for (vector<DTSegmentCand*>::iterator cand = cands.begin(); cand != cands.end(); ++cand) {
     if (*(*cand) == *seg)
       return false;
     if (((*cand)->nHits() >= seg->nHits()) && ((*cand)->chi2ndof() < seg->chi2ndof()))
       if ((*cand)->nSharedHitPairs(*seg) > int(seg->nHits() - 2))
         return false;
   }
   return true;
 }

DTSegmentCand * DTMeantimerPatternReco::fitWithT0	(	DTSegmentCand *	seg,
		const bool	fitdebug
	)

private

Definition at line 330 of file DTMeantimerPatternReco.cc.

References hltPixelTracks_cff::chi2, DTSegmentCand::chi2(), DTSegmentUpdator::fit(), DTSegmentCand::nHits(), DTSegmentCand::t0(), theMaxChi2, and theUpdator.

Referenced by addHits().

                                                                                         {
   // perform the 3 parameter fit on the segment candidate
   theUpdator->fit(seg, true, fitdebug);
   double chi2 = seg->chi2();
 
   // Sanity check - drop segment candidates with a failed 3-par fit.
   // (this includes segments with hits after the calculated t0 correction ending up
   // beyond the chamber walls or on the other side of the wire)
   if (chi2 == -1.)
     return nullptr;
 
   // at this point we keep all 3-hit segments that passed the above check
   if (seg->nHits() == 3)
     return seg;
 
   // for segments with no t0 information we impose a looser chi2 cut
   if (seg->t0() == 0) {
     if (chi2 < 100.)
       return seg;
     else
       return nullptr;
   }
 
   // cut on chi2/ndof of the segment candidate
   if ((chi2 / (seg->nHits() - 3) < theMaxChi2))
     return seg;
   else
     return nullptr;
 }

bool DTMeantimerPatternReco::geometryFilter	(	const DTWireId	first,
		const DTWireId	second
	)		const

private

Definition at line 294 of file DTMeantimerPatternReco.cc.

References funct::abs(), gather_cfg::cout, DTLayerId::layer(), DTWireId::layerId(), DTSuperLayerId::superLayer(), DTLayerId::superlayerId(), and DTWireId::wire().

Referenced by addHits(), and buildSegments().

                                                                                              {
   //  return true;
 
   const int layerLowerCut[4] = {0, -1, -2, -2};
   const int layerUpperCut[4] = {0, 2, 2, 3};
   //  const int layerLowerCut[4]={0,-2,-4,-5};
   //  const int layerUpperCut[4]={0, 3, 4, 6};
 
   // deal only with hits that are in the same SL
   if (first.layerId().superlayerId().superLayer() != second.layerId().superlayerId().superLayer())
     return true;
 
   int deltaLayer = abs(first.layerId().layer() - second.layerId().layer());
 
   // drop hits in the same layer
   if (!deltaLayer)
     return false;
 
   // protection against unexpected layer numbering
   if (deltaLayer > 3) {
     cout << "*** WARNING! DT Layer numbers differ by more than 3! for hits: " << endl;
     cout << "             " << first << endl;
     cout << "             " << second << endl;
     return false;
   }
 
   // accept only hits in cells "not too far away"
   int deltaWire = first.wire() - second.wire();
   if (second.layerId().layer() % 2 == 0)
     deltaWire = -deltaWire;  // yet another trick to get it right...
   if ((deltaWire <= layerLowerCut[deltaLayer]) || (deltaWire >= layerUpperCut[deltaLayer]))
     return false;
 
   return true;
 }

vector< std::shared_ptr< DTHitPairForFit > > DTMeantimerPatternReco::initHits	(	const DTSuperLayer *	sl,
		const std::vector< DTRecHit1DPair > &	hits
	)

private

Definition at line 85 of file DTMeantimerPatternReco.cc.

References mps_fire::result, and theDTGeometry.

Referenced by DTMeantimerPatternReco4D::buildPhiSuperSegmentsCandidates(), and reconstruct().

                                                                                                                  {
   hitCont result;
   for (vector<DTRecHit1DPair>::const_iterator hit = hits.begin(); hit != hits.end(); ++hit) {
     result.push_back(std::make_shared<DTHitPairForFit>(*hit, *sl, theDTGeometry));
   }
   return result;
 }

void DTMeantimerPatternReco::printPattern	(	std::vector< DTSegmentCand::AssPoint > &	assHits,
		const DTHitPairForFit *	hit
	)

private

Definition at line 371 of file DTMeantimerPatternReco.cc.

References gather_cfg::cout, mps_fire::i, DTEnums::Left, and cuy::mark.

                                                                                                             {
   char mark[26] = {". . . . . . . . . . . . "};
   int wire[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
   for (vector<DTSegmentCand::AssPoint>::const_iterator assHit = assHits.begin(); assHit != assHits.end(); ++assHit) {
     int lay =
         (((*assHit).first)->id().superlayerId().superLayer() - 1) * 4 + ((*assHit).first)->id().layerId().layer() - 1;
     wire[lay] = ((*assHit).first)->id().wire();
     if ((*assHit).second == DTEnums::Left)
       mark[lay * 2] = 'L';
     else
       mark[lay * 2] = 'R';
   }
 
   int lay = ((*hit).id().superlayerId().superLayer() - 1) * 4 + (*hit).id().layerId().layer() - 1;
   wire[lay] = (*hit).id().wire();
   mark[lay * 2] = '*';
 
   cout << "   " << mark << endl << "  ";
   for (int i = 0; i < 12; i++)
     if (wire[i])
       cout << setw(2) << wire[i];
     else
       cout << "  ";
   cout << endl;
 }

edm::OwnVector< DTSLRecSegment2D > DTMeantimerPatternReco::reconstruct	(	const DTSuperLayer *	sl,
		const std::vector< DTRecHit1DPair > &	hits
	)

overridevirtual

this function is called in the producer

Implements DTRecSegment2DBaseAlgo.

Definition at line 57 of file DTMeantimerPatternReco.cc.

References buildSegments(), HLT_2018_cff::candidates, gather_cfg::cout, debug, initHits(), edm::OwnVector< T, P >::push_back(), mps_fire::result, theUpdator, and DTSegmentUpdator::update().

Referenced by DTMeantimerPatternReco4D::reconstruct().

                                                                                                              {
   edm::OwnVector<DTSLRecSegment2D> result;
   std::vector<std::shared_ptr<DTHitPairForFit>> hitsForFit = initHits(sl, pairs);
 
   vector<DTSegmentCand*> candidates = buildSegments(sl, hitsForFit);
 
   vector<DTSegmentCand*>::const_iterator cand = candidates.begin();
   while (cand < candidates.end()) {
     DTSLRecSegment2D* segment = (**cand);
     theUpdator->update(segment, true);
 
     if (debug)
       cout << "Reconstructed 2D segments " << *segment << endl;
     result.push_back(segment);
 
     delete *(cand++);  // delete the candidate!
   }
 
   return result;
 }

void DTMeantimerPatternReco::setES ( const edm::EventSetup & setup )

overridevirtual

Through this function the EventSetup is percolated to the objs which request it

Implements DTRecSegment2DBaseAlgo.

Definition at line 79 of file DTMeantimerPatternReco.cc.

References edm::EventSetup::get(), DTSegmentUpdator::setES(), theDTGeometry, and theUpdator.

Referenced by DTMeantimerPatternReco4D::setES().

                                                              {
   // Get the DT Geometry
   setup.get<MuonGeometryRecord>().get(theDTGeometry);
   theUpdator->setES(setup);
 }