#include <ME0SegAlgoRU.h>

Inheritance diagram for ME0SegAlgoRU:

Classes
struct	SegmentParameters

Public Types
typedef std::vector< bool >	BoolContainer

typedef std::vector< std::pair< float, HitAndPositionPtrContainer > >	SegmentByMetricContainer

Public Types inherited from ME0SegmentAlgorithmBase
typedef std::vector< HitAndPosition >	HitAndPositionContainer

typedef std::vector< const HitAndPosition * >	HitAndPositionPtrContainer

Public Member Functions
	ME0SegAlgoRU (const edm::ParameterSet &ps)
	Constructor. More...

std::vector< ME0Segment >	run (const ME0Chamber *chamber, const HitAndPositionContainer &rechits) override

	~ME0SegAlgoRU () override
	Destructor. More...

Public Member Functions inherited from ME0SegmentAlgorithmBase
	ME0SegmentAlgorithmBase (const edm::ParameterSet &)
	Constructor. More...

virtual	~ME0SegmentAlgorithmBase ()
	Destructor. More...

Private Member Functions
std::unique_ptr< MuonSegFit >	addHit (HitAndPositionPtrContainer &proto_segment, const HitAndPosition &aHit) const

void	addUniqueSegments (SegmentByMetricContainer &proto_segments, std::vector< ME0Segment > &segments, BoolContainer &used) const

bool	areHitsCloseInEta (const float maxETA, const bool beamConst, const GlobalPoint &h1, const GlobalPoint &h2) const

bool	areHitsCloseInGlobalPhi (const float maxPHI, const unsigned int nLayDisp, const GlobalPoint &h1, const GlobalPoint &h2) const

bool	areHitsConsistentInTime (const float maxTOF, const HitAndPositionPtrContainer &proto_segment, const HitAndPosition &h) const

void	compareProtoSegment (std::unique_ptr< MuonSegFit > &current_fit, HitAndPositionPtrContainer &current_proto_segment, const HitAndPosition &new_hit) const

float	getHitSegChi2 (const std::unique_ptr< MuonSegFit > &fit, const ME0RecHit &hit) const

GlobalPoint	globalAtZ (const std::unique_ptr< MuonSegFit > &fit, float z) const

bool	hasHitOnLayer (const HitAndPositionPtrContainer &proto_segment, const unsigned int layer) const

void	increaseProtoSegment (const float maxChi2, std::unique_ptr< MuonSegFit > &current_fit, HitAndPositionPtrContainer &current_proto_segment, const HitAndPosition &new_hit) const

bool	isHitNearSegment (const float maxETA, const float maxPHI, const std::unique_ptr< MuonSegFit > &fit, const HitAndPositionPtrContainer &proto_segment, const HitAndPosition &h) const

void	lookForSegments (const SegmentParameters &params, const unsigned int n_seg_min, const HitAndPositionContainer &rechits, const std::vector< unsigned int > &recHits_per_layer, BoolContainer &used, std::vector< ME0Segment > &segments) const

std::unique_ptr< MuonSegFit >	makeFit (const HitAndPositionPtrContainer &proto_segment) const

void	pruneBadHits (const float maxChi2, HitAndPositionPtrContainer &proto_segment, std::unique_ptr< MuonSegFit > &fit, const unsigned int n_seg_min) const

void	tryAddingHitsToSegment (const float maxTOF, const float maxETA, const float maxPhi, const float maxChi2, std::unique_ptr< MuonSegFit > &current_fit, HitAndPositionPtrContainer &proto_segment, const BoolContainer &used, HitAndPositionContainer::const_iterator i1, HitAndPositionContainer::const_iterator i2) const

Private Attributes
bool	allowWideSegments

SegmentParameters	displacedParameters

bool	doCollisions

const std::string	myName

SegmentParameters	stdParameters

const ME0Chamber *	theChamber

SegmentParameters	wideParameters

Detailed Description

adapted from CSC to ME0 bt Marcello Maggi

This is the original algorithm for building endcap muon track segments out of the rechit's in a ME0Chamber 'RU' = 'RUssia' = Road Usage

A ME0Segment is a RecSegment4D, and is built from ME0RecHit2D objects, each of which is a RecHit2DLocalPos.

This class is used by the ME0SegmentAlgorithm.
Alternative algorithms can be used for the segment building by writing classes like this, and then selecting which one is actually used via the ME0SegmentBuilder.

developed and implemented by Vladimir Palichik Vladi.nosp@m.mir..nosp@m.Paltc.nosp@m.hik@.nosp@m.cern..nosp@m.ch and Nikolay Voytishin nikol.nosp@m.ay.v.nosp@m.oytis.nosp@m.hin@.nosp@m.cern..nosp@m.ch

Definition at line 32 of file ME0SegAlgoRU.h.

Member Typedef Documentation

typedef std::vector<bool> ME0SegAlgoRU::BoolContainer

Definition at line 50 of file ME0SegAlgoRU.h.

typedef std::vector<std::pair<float,HitAndPositionPtrContainer> > ME0SegAlgoRU::SegmentByMetricContainer

Definition at line 51 of file ME0SegAlgoRU.h.

Constructor & Destructor Documentation

ME0SegAlgoRU::ME0SegAlgoRU ( const edm::ParameterSet & ps )

explicit

Constructor.

Definition at line 27 of file ME0SegAlgoRU.cc.

 : ME0SegmentAlgorithmBase(ps), myName("ME0SegAlgoRU") {
 
     allowWideSegments = ps.getParameter<bool>("allowWideSegments");
     doCollisions = ps.getParameter<bool>("doCollisions");
 
     stdParameters.maxChi2Additional = ps.getParameter<double>("maxChi2Additional");
     stdParameters.maxChi2Prune      = ps.getParameter<double>("maxChi2Prune"     );
     stdParameters.maxChi2GoodSeg    = ps.getParameter<double>("maxChi2GoodSeg"   ) ;
     stdParameters.maxPhiSeeds       = ps.getParameter<double>("maxPhiSeeds"      ) ;
     stdParameters.maxPhiAdditional  = ps.getParameter<double>("maxPhiAdditional" );
     stdParameters.maxETASeeds       = ps.getParameter<double>("maxETASeeds"      );
     stdParameters.maxTOFDiff        = ps.getParameter<double>("maxTOFDiff"      );
     stdParameters.requireCentralBX  = ps.getParameter<bool>("requireCentralBX"      );
     stdParameters.minNumberOfHits   = ps.getParameter<unsigned int>("minNumberOfHits"      );
     stdParameters.requireBeamConstr = true;
 
     wideParameters = stdParameters;
     wideParameters.maxChi2Prune     *=2;
     wideParameters.maxChi2GoodSeg   *=2;
     wideParameters.maxPhiSeeds      *=2;
     wideParameters.maxPhiAdditional *=2;
     wideParameters.minNumberOfHits  +=1;
 
 
     displacedParameters = stdParameters;
     displacedParameters.maxChi2Additional *= 2;
     displacedParameters.maxChi2Prune      = 100;
     displacedParameters.maxChi2GoodSeg    *= 5;
     displacedParameters.maxPhiSeeds       *=2;
     displacedParameters.maxPhiAdditional  *=2;
     displacedParameters.maxETASeeds       *=2;
     displacedParameters.requireBeamConstr = false;
 
 
     LogDebug("ME0SegAlgoRU") << myName << " has algorithm cuts set to: \n"
             << "--------------------------------------------------------------------\n"
             << "allowWideSegments   = " <<allowWideSegments              << "\n"
             << "doCollisions        = " <<doCollisions                   << "\n"
             << "maxChi2Additional   = " <<stdParameters.maxChi2Additional<< "\n"
             << "maxChi2Prune        = " <<stdParameters.maxChi2Prune     << "\n"
             << "maxChi2GoodSeg      = " <<stdParameters.maxChi2GoodSeg   << "\n"
             << "maxPhiSeeds         = " <<stdParameters.maxPhiSeeds      << "\n"
             << "maxPhiAdditional    = " <<stdParameters.maxPhiAdditional << "\n"
             << "maxETASeeds         = " <<stdParameters.maxETASeeds      << "\n"
             << "maxTOFDiff          = " <<stdParameters.maxTOFDiff       << "\n"
             << std::endl;
 
     theChamber=nullptr;
 
 }

ME0SegAlgoRU::~ME0SegAlgoRU ( )

inlineoverride

Destructor.

Definition at line 56 of file ME0SegAlgoRU.h.

References addHit(), addUniqueSegments(), areHitsCloseInEta(), areHitsCloseInGlobalPhi(), areHitsConsistentInTime(), relativeConstraints::chamber, compareProtoSegment(), getHitSegChi2(), globalAtZ(), hasHitOnLayer(), increaseProtoSegment(), isHitNearSegment(), lookForSegments(), makeFit(), btvTracks_cfi::maxChi2, trackingParticleSelector_cfi::maxPhi, pruneBadHits(), TrackInfoProducer_cfi::rechits, run(), tryAddingHitsToSegment(), and z.

56 {};

Member Function Documentation

std::unique_ptr< MuonSegFit > ME0SegAlgoRU::addHit	(	HitAndPositionPtrContainer &	proto_segment,
		const HitAndPosition &	aHit
	)		const

private

Definition at line 367 of file ME0SegAlgoRU.cc.

References makeFit().

Referenced by compareProtoSegment(), increaseProtoSegment(), lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                            {
     proto_segment.push_back(&aHit);
     // make a fit
     return makeFit(proto_segment);
 }

void ME0SegAlgoRU::addUniqueSegments	(	SegmentByMetricContainer &	proto_segments,
		std::vector< ME0Segment > &	segments,
		BoolContainer &	used
	)		const

private

Definition at line 242 of file ME0SegAlgoRU.cc.

References a, b, ME0Chamber::computeDeltaPhi(), objects.autophobj::float, training_settings::idx, ME0SegmentAlgorithmBase::HitAndPosition::layer, makeFit(), mathSSE::sqrt(), groupFilesInBlocks::temp, and theChamber.

Referenced by lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                                          {
     std::sort(proto_segments.begin(),proto_segments.end(),
             [](const std::pair<float,HitAndPositionPtrContainer> & a,
                     const std::pair<float,HitAndPositionPtrContainer> & b) { return a.first < b.first;});
 
     //Now add to the collect based on minChi2 marking the hits as used after
     std::vector<unsigned int> usedHits;
     for(unsigned int iS = 0; iS < proto_segments.size(); ++iS){
         HitAndPositionPtrContainer currentProtoSegment = proto_segments[iS].second;
 
         //check to see if we already used thes hits this round
         bool alreadyFilled=false;
         for(unsigned int iH = 0; iH < currentProtoSegment.size(); ++iH){
             for(unsigned int iOH = 0; iOH < usedHits.size(); ++iOH){
                 if(usedHits[iOH]!=currentProtoSegment[iH]->idx) continue;
                 alreadyFilled = true;
                 break;
             }
         }
         if(alreadyFilled) continue;
         for(const auto* h : currentProtoSegment){
             usedHits.push_back(h->idx);
             used[h->idx] = true;
         }
 
         std::unique_ptr<MuonSegFit> current_fit = makeFit(currentProtoSegment);
 
         // Create an actual ME0Segment - retrieve all info from the fit
         // calculate the timing fron rec hits associated to the TrackingRecHits used
         // to fit the segment
         float averageTime=0.;
         for(const auto* h : currentProtoSegment){
             averageTime += h->rh->tof();
         }
         averageTime /= float(currentProtoSegment.size());
         float timeUncrt=0.;
         for(const auto* h : currentProtoSegment){
             timeUncrt += (h->rh->tof()-averageTime)*(h->rh->tof()-averageTime);
         }
         timeUncrt = std::sqrt(timeUncrt/float(currentProtoSegment.size()-1));
 
         std::sort(currentProtoSegment.begin(),currentProtoSegment.end(),
                 [](const HitAndPosition* a, const HitAndPosition *b) {return a->layer < b->layer;}
         );
 
         std::vector<const ME0RecHit*> bareRHs; bareRHs.reserve(currentProtoSegment.size());
         for(const auto* rh : currentProtoSegment) bareRHs.push_back(rh->rh);
         const float dPhi = theChamber->computeDeltaPhi(current_fit->intercept(),current_fit->localdir());
         ME0Segment temp(bareRHs, current_fit->intercept(),
                 current_fit->localdir(), current_fit->covarianceMatrix(), current_fit->chi2(), averageTime, timeUncrt, dPhi);
         segments.push_back(temp);
 
 
     }
 }

bool ME0SegAlgoRU::areHitsCloseInEta	(	const float	maxETA,
		const bool	beamConst,
		const GlobalPoint &	h1,
		const GlobalPoint &	h2
	)		const

private

Definition at line 325 of file ME0SegAlgoRU.cc.

References diffTreeTool::diff, PV3DBase< T, PVType, FrameType >::eta(), and SiStripPI::max.

Referenced by lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                                  {
     float diff = 0;
     diff = std::fabs(h1.eta() - h1.eta());
     edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::areHitsCloseInEta] gp1 = "<<h1<<" in eta part = "<<h1.eta() <<" and gp2 = "<<h2<<" in eta part = "<<h2.eta() <<" ==> dEta = "<<diff<<" ==> return "<<(diff < 0.1)<<std::endl;
     return (diff < std::max(maxETA,float(0.01)) ); //temp for floating point comparision...maxEta is the difference between partitions, so x1.5 to take into account non-circle geom.
 }

bool ME0SegAlgoRU::areHitsCloseInGlobalPhi	(	const float	maxPHI,
		const unsigned int	nLayDisp,
		const GlobalPoint &	h1,
		const GlobalPoint &	h2
	)		const

private

Definition at line 332 of file ME0SegAlgoRU.cc.

References PV3DBase< T, PVType, FrameType >::barePhi(), hiPixelPairStep_cff::deltaPhi, and SiStripPI::max.

Referenced by lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                                               {
     float dphi12 = deltaPhi(h1.barePhi(),h2.barePhi());
     edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::areHitsCloseInGlobalPhi] gp1 = "<<h1<<" and gp2 = "<<h2<<" ==> dPhi = "<<dphi12<<" ==> return "<<(fabs(dphi12) < std::max(maxPHI,float(0.02)))<<std::endl;
     return fabs(dphi12) < std::max(maxPHI, float(float(nLayDisp)*0.004));
 }

bool ME0SegAlgoRU::areHitsConsistentInTime	(	const float	maxTOF,
		const HitAndPositionPtrContainer &	proto_segment,
		const HitAndPosition &	h
	)		const

private

Definition at line 352 of file ME0SegAlgoRU.cc.

References ME0SegmentAlgorithmBase::HitAndPosition::rh, and ME0RecHit::tof().

Referenced by tryAddingHitsToSegment(), and ~ME0SegAlgoRU().

                                                                                                                                               {
     std::vector<float> tofs; tofs.reserve(proto_segment.size() + 1);
     tofs.push_back(h.rh->tof());
     for(const auto* ih : proto_segment) tofs.push_back(ih->rh->tof());
     std::sort(tofs.begin(),tofs.end());
     if(std::fabs(tofs.front() - tofs.back()) < maxTOF +1.0 ) return true;
     return false;
 }

void ME0SegAlgoRU::compareProtoSegment	(	std::unique_ptr< MuonSegFit > &	current_fit,
		HitAndPositionPtrContainer &	current_proto_segment,
		const HitAndPosition &	new_hit
	)		const

private

Definition at line 425 of file ME0SegAlgoRU.cc.

References funct::abs(), addHit(), objects.autophobj::float, ME0SegmentAlgorithmBase::HitAndPosition::layer, ME0SegmentAlgorithmBase::HitAndPosition::lp, eostools::move(), ME0SegmentAlgorithmBase::HitAndPosition::rh, and ME0RecHit::tof().

Referenced by tryAddingHitsToSegment(), and ~ME0SegAlgoRU().

                                                                                                                                                                      {
     const HitAndPosition * old_hit = nullptr;
     HitAndPositionPtrContainer new_proto_segment = current_proto_segment;
 
     HitAndPositionPtrContainer::const_iterator it;
     for (auto it = new_proto_segment.begin(); it != new_proto_segment.end();) {
         if ((*it)->layer == new_hit.layer) {
             old_hit = *it;
             it = new_proto_segment.erase(it);
         } else {
             ++it;
         }
     }
     if(old_hit == nullptr) return;
     auto new_fit = addHit(new_proto_segment,new_hit);
 
     //If on the same strip but different BX choose the closest
     bool useNew = false;
     if(old_hit->lp == new_hit.lp ){
         float avgtof = 0;
         for(const auto* h : current_proto_segment)
             if(old_hit != h) avgtof += h->rh->tof();
         avgtof /= float(current_proto_segment.size() - 1);
         if(std::abs(avgtof - new_hit.rh->tof() ) <
                 std::abs(avgtof - old_hit->rh->tof() )
         ) useNew = true;
     } //otherwise base it on chi2
     else if(new_fit->chi2() < current_fit->chi2()) useNew = true;
 
     if(useNew){
         current_proto_segment = new_proto_segment;
         current_fit = std::move(new_fit);
     }
 
 }

float ME0SegAlgoRU::getHitSegChi2	(	const std::unique_ptr< MuonSegFit > &	fit,
		const ME0RecHit &	hit
	)		const

private

Definition at line 404 of file ME0SegAlgoRU.cc.

References ME0RecHit::localPosition(), ME0RecHit::localPositionError(), and LocalError::xx().

Referenced by pruneBadHits(), and ~ME0SegAlgoRU().

                                                                                                  {
     const auto lp = hit.localPosition();
     const auto le = hit.localPositionError();
     const float du = fit->xdev(lp.x(),lp.z());
     const float dv = fit->ydev(lp.y(),lp.z());
 
     ROOT::Math::SMatrix<double,2,2,ROOT::Math::MatRepSym<double,2> > IC;
     IC(0,0) = le.xx();
     IC(1,0) = le.xy();
     IC(1,1) = le.yy();
 
     // Invert covariance matrix
     IC.Invert();
     return du*du*IC(0,0) + 2.*du*dv*IC(0,1) + dv*dv*IC(1,1);
 }

GlobalPoint ME0SegAlgoRU::globalAtZ	(	const std::unique_ptr< MuonSegFit > &	fit,
		float	z
	)		const

private

Definition at line 361 of file ME0SegAlgoRU.cc.

References theChamber, GeomDet::toGlobal(), x, and y.

Referenced by isHitNearSegment(), and ~ME0SegAlgoRU().

                                                                                        {
     float x = fit->xfit(z);
     float y = fit->yfit(z);
     return theChamber->toGlobal(LocalPoint(x,y,z));
 }

bool ME0SegAlgoRU::hasHitOnLayer	(	const HitAndPositionPtrContainer &	proto_segment,
		const unsigned int	layer
	)		const

private

Definition at line 420 of file ME0SegAlgoRU.cc.

Referenced by tryAddingHitsToSegment(), and ~ME0SegAlgoRU().

                                                                                                                 {
     for(const auto* h : proto_segment) if(h->layer == layer) return true;
     return false;
 }

void ME0SegAlgoRU::increaseProtoSegment	(	const float	maxChi2,
		std::unique_ptr< MuonSegFit > &	current_fit,
		HitAndPositionPtrContainer &	current_proto_segment,
		const HitAndPosition &	new_hit
	)		const

private

Definition at line 461 of file ME0SegAlgoRU.cc.

References addHit(), btvTracks_cfi::maxChi2, and eostools::move().

Referenced by tryAddingHitsToSegment(), and ~ME0SegAlgoRU().

                                                                                                                                                                                            {
     HitAndPositionPtrContainer new_proto_segment = current_proto_segment;
     auto new_fit = addHit(new_proto_segment,new_hit);
     //  edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::increaseProtoSegment] new chi2 = "<<new_fit->chi2()<<" new chi2/dof = "<<new_fit->chi2()/new_fit->ndof() <<" ==> add: " << (new_fit->chi2()/new_fit->ndof() < maxChi2 ) <<std::endl;
     if(new_fit->chi2()/new_fit->ndof() < maxChi2 ){
         current_proto_segment = new_proto_segment;
         current_fit = std::move(new_fit);
     }
 }

bool ME0SegAlgoRU::isHitNearSegment	(	const float	maxETA,
		const float	maxPHI,
		const std::unique_ptr< MuonSegFit > &	fit,
		const HitAndPositionPtrContainer &	proto_segment,
		const HitAndPosition &	h
	)		const

private

Definition at line 338 of file ME0SegAlgoRU.cc.

References PV3DBase< T, PVType, FrameType >::barePhi(), hiPixelPairStep_cff::deltaPhi, PV3DBase< T, PVType, FrameType >::eta(), globalAtZ(), ME0SegmentAlgorithmBase::HitAndPosition::gp, ME0SegmentAlgorithmBase::HitAndPosition::lp, SiStripPI::max, PV3DBase< T, PVType, FrameType >::phi(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by tryAddingHitsToSegment(), and ~ME0SegAlgoRU().

                                                                                                                                                                                                  {
     //Get average eta, based on the two seeds...asssumes that we have not started pruning yet!
     const float avgETA = (proto_segment[1]->gp.eta() + proto_segment[0]->gp.eta())/2.;
     //  edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::isHitNearSegment] average eta = "<<avgETA<<" additionalHit eta = "<<h.gp.eta() <<" ==> dEta = "<<std::fabs(h.gp.eta() - avgETA) <<" ==> return "<<(std::fabs(h.gp.eta() - avgETA) < std::max(maxETA,float(0.01) ))<<std::endl;
     if(std::fabs(h.gp.eta() - avgETA) > std::max(maxETA,float(0.01) )) return false;
 
     //Now check the dPhi based on the segment fit
     GlobalPoint globIntercept = globalAtZ(fit, h.lp.z());
     float dPhi = deltaPhi(h.gp.barePhi(),globIntercept.phi());
     //check to see if it is inbetween the two rolls of the outer and inner hits
     //  edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::isHitNearSegment] projected phi = "<<globIntercept.phi()<<" additionalHit phi = "<<h.gp.barePhi() <<" ==> dPhi = "<<dPhi <<" ==> return "<<(std::fabs(dPhi) <  std::max(maxPHI,float(0.001)))<<std::endl;
     return (std::fabs(dPhi) <  std::max(maxPHI,float(0.001)));
 }

void ME0SegAlgoRU::lookForSegments	(	const SegmentParameters &	params,
		const unsigned int	n_seg_min,
		const HitAndPositionContainer &	rechits,
		const std::vector< unsigned int > &	recHits_per_layer,
		BoolContainer &	used,
		std::vector< ME0Segment > &	segments
	)		const

private

Definition at line 176 of file ME0SegAlgoRU.cc.

Referenced by run(), and ~ME0SegAlgoRU().

                                                                      {
     auto ib = rechits.begin();
     auto ie = rechits.end();
     std::vector<std::pair<float,HitAndPositionPtrContainer> > proto_segments;
     // the first hit is taken from the back
     for (auto i1 = ib; i1 != ie; ++i1) {
         const auto& h1 = *i1;
 
         //skip if rh is used and the layer tat has big rh multiplicity(>25RHs)
         if(used[h1.idx]) continue;
         if(recHits_per_layer[h1.layer-1]>100) continue;
 
         //      bool segok = false;
         // the second hit from the front
         for (auto i2 = ie-1; i2 != i1; --i2) {
             //          if(segok) break; //Currently turned off
             const auto& h2 = *i2;
 
             //skip if rh is used and the layer tat has big rh multiplicity(>25RHs)
             if(used[h2.idx]) continue;
             if(recHits_per_layer[h2.layer-1]>100) continue;
 
             //Stop if the distance between layers is not large enough
             if((std::abs(int(h2.layer) - int(h1.layer)) + 1) < int(n_seg_min)) break;
 
             if(std::fabs(h1.rh->tof()-h2.rh->tof()) > params.maxTOFDiff + 1.0 )continue;
             if(!areHitsCloseInEta(params.maxETASeeds, params.requireBeamConstr, h1.gp, h2.gp)) continue;
             if(!areHitsCloseInGlobalPhi(params.maxPhiSeeds,abs(int(h2.layer) - int(h1.layer)), h1.gp, h2.gp)) continue;
 
             HitAndPositionPtrContainer current_proto_segment;
             std::unique_ptr<MuonSegFit> current_fit;
             current_fit = addHit(current_proto_segment,h1);
             current_fit = addHit(current_proto_segment,h2);
 
             tryAddingHitsToSegment(params.maxTOFDiff,params.maxETASeeds, params.maxPhiAdditional, params.maxChi2Additional, current_fit,current_proto_segment, used,i1,i2);
 
             if(current_proto_segment.size() > n_seg_min)
                 pruneBadHits(params.maxChi2Prune,current_proto_segment,current_fit,n_seg_min);
 
             edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::lookForSegments] # of hits in segment " << current_proto_segment.size() <<" min # "<< n_seg_min <<" => "<< (current_proto_segment.size() >= n_seg_min) << " chi2/ndof "<<current_fit->chi2()/current_fit->ndof()<<" => "<<(current_fit->chi2()/current_fit->ndof() < params.maxChi2GoodSeg ) <<std::endl;
 
             if(current_proto_segment.size() < n_seg_min) continue;
             const float current_metric = current_fit->chi2()/current_fit->ndof();
             if(current_metric > params.maxChi2GoodSeg) continue;
 
             if(params.requireCentralBX){
                 int nCentral = 0;
                 int nNonCentral =0;
                 for(const auto* rh : current_proto_segment ) {
                     if(std::fabs(rh->rh->tof())  < 2 ) nCentral++;
                     else nNonCentral++;
                 }
                 if(nNonCentral >= nCentral) continue;
             }
             //          segok = true;
 
             proto_segments.emplace_back( current_metric, current_proto_segment);
         }
 
     }
     addUniqueSegments(proto_segments,segments,used);
 
 }

std::unique_ptr< MuonSegFit > ME0SegAlgoRU::makeFit ( const HitAndPositionPtrContainer & proto_segment ) const

private

Definition at line 373 of file ME0SegAlgoRU.cc.

References ME0RecHit::clone(), and ME0RecHit::setPosition().

Referenced by addHit(), addUniqueSegments(), pruneBadHits(), and ~ME0SegAlgoRU().

                                                                                                      {
     // for ME0 we take the me0rechit from the proto_segment we transform into Tracking Rechits
     // the local rest frame is the ME0Chamber
     MuonSegFit::MuonRecHitContainer muonRecHits;
     for (auto rh=proto_segment.begin();rh<proto_segment.end(); rh++){
         ME0RecHit *newRH = (*rh)->rh->clone();
         newRH->setPosition((*rh)->lp);
         MuonSegFit::MuonRecHitPtr trkRecHit(newRH);
         muonRecHits.push_back(trkRecHit);
     }
     std::unique_ptr<MuonSegFit> currentFit(new MuonSegFit(muonRecHits));
     currentFit->fit();
     return currentFit;
 }

void ME0SegAlgoRU::pruneBadHits	(	const float	maxChi2,
		HitAndPositionPtrContainer &	proto_segment,
		std::unique_ptr< MuonSegFit > &	fit,
		const unsigned int	n_seg_min
	)		const

private

Definition at line 388 of file ME0SegAlgoRU.cc.

References getHitSegChi2(), makeFit(), and btvTracks_cfi::maxChi2.

Referenced by lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                                                                   {
     while(proto_segment.size() > n_seg_min && fit->chi2()/fit->ndof()  > maxChi2){
         float maxDev = -1;
         HitAndPositionPtrContainer::iterator worstHit;
         for(auto it = proto_segment.begin(); it != proto_segment.end(); ++it){
             const float dev = getHitSegChi2(fit,*(*it)->rh);
             if(dev < maxDev) continue;
             maxDev = dev;
             worstHit = it;
         }
         edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU::pruneBadHits] pruning one hit-> layer: "<< (*worstHit)->layer <<" eta: "<< (*worstHit)->gp.eta() <<" phi: "<<(*worstHit)->gp.phi()<<" old chi2/dof: "<<fit->chi2()/fit->ndof() << std::endl;
         proto_segment.erase( worstHit);
         fit = makeFit(proto_segment);
     }
 }

std::vector< ME0Segment > ME0SegAlgoRU::run	(	const ME0Chamber *	chamber,
		const HitAndPositionContainer &	rechits
	)

overridevirtual

Here we must implement the algorithm

Implements ME0SegmentAlgorithmBase.

Definition at line 79 of file ME0SegAlgoRU.cc.

References allowWideSegments, relativeConstraints::chamber, displacedParameters, doCollisions, ME0Chamber::id(), lookForSegments(), ME0SegAlgoRU::SegmentParameters::minNumberOfHits, stdParameters, and theChamber.

Referenced by ~ME0SegAlgoRU().

                                                                                                          {
 
 #ifdef EDM_ML_DEBUG // have lines below only compiled when in debug mode
     ME0DetId chId(chamber->id());
     edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegmentAlgorithm::run] build segments in chamber " << chId << " which contains "<<rechits.size()<<" rechits";
     for(unsigned int iH = 0; iH < rechits.size(); ++iH){
         auto me0id = rechits[iH].rh->me0Id();
         auto rhLP  = rechits[iH].lp;
         edm::LogVerbatim("ME0SegAlgoRU") << "[RecHit :: Loc x = "<<std::showpos<<std::setw(9)<<rhLP.x()<<" Glb y = "<<std::showpos<<std::setw(9)<<rhLP.y()<<" Time = "<<std::showpos<<rechits[iH].rh->tof()<<" -- "<<me0id.rawId()<<" = "<<me0id<<" ]"<<std::endl;
     }
 #endif
 
 
     if (rechits.size() < 3 || rechits.size()>300){
         return std::vector<ME0Segment>();
     }
 
     theChamber = chamber;
 
     std::vector<unsigned int> recHits_per_layer(6,0);
     for(unsigned int iH = 0; iH < rechits.size(); ++iH) {
         recHits_per_layer[rechits[iH].layer-1]++;
     }
 
     BoolContainer used(rechits.size(),false);
 
     // We have at least 2 hits. We intend to try all possible pairs of hits to start
     // segment building. 'All possible' means each hit lies on different layers in the chamber.
     // after all same size segs are build we get rid of the overcrossed segments using the chi2 criteria
     // the hits from the segs that are left are marked as used and are not added to segs in future iterations
     // the hits from 3p segs are marked as used separately in order to try to assamble them in longer segments
     // in case there is a second pass
 
     // Choose first hit (as close to IP as possible) h1 and second hit
     // (as far from IP as possible) h2 To do this we iterate over hits
     // in the chamber by layer - pick two layers.  Then we
     // iterate over hits within each of these layers and pick h1 and h2
     // these.  If they are 'close enough' we build an empty
     // segment.  Then try adding hits to this segment.
 
     std::vector<ME0Segment> segments;
 
     auto doStd = [&] () {
         for(unsigned int n_seg_min = 6u; n_seg_min  >= stdParameters.minNumberOfHits; --n_seg_min)
             lookForSegments(stdParameters,n_seg_min,rechits,recHits_per_layer, used, segments);
     };
     auto doDisplaced = [&] () {
         for(unsigned int n_seg_min = 6u; n_seg_min  >= displacedParameters.minNumberOfHits; --n_seg_min)
             lookForSegments(displacedParameters,n_seg_min,rechits,recHits_per_layer, used,segments);
     };
     // Not currently used
     // auto doWide = [&] () {
     //  for(unsigned int n_seg_min = 6u; n_seg_min >= wideParameters.minNumberOfHits; --n_seg_min)
     //      lookForSegments(wideParameters,n_seg_min,rechits,recHits_per_layer, used,segments);
     // };
     auto printSegments = [&] {
 #ifdef EDM_ML_DEBUG // have lines below only compiled when in debug mode
         for(unsigned int iS = 0; iS < segments.size(); ++iS) {
             const auto& seg = segments[iS];
             ME0DetId chId(seg.me0DetId());
             const auto& rechits = seg.specificRecHits();
             edm::LogVerbatim("ME0SegAlgoRU") << "[ME0SegAlgoRU] segment in chamber " << chId << " which contains "<<rechits.size()<<" rechits and with specs: \n"<<seg;
             for (auto rh=rechits.begin(); rh!=rechits.end(); ++rh){
                 auto me0id = rh->me0Id();
                 edm::LogVerbatim("ME0SegAlgoRU") << "[RecHit :: Loc x = "<<std::showpos<<std::setw(9)<<rh->localPosition().x()<<" Loc y = "<<std::showpos<<std::setw(9)<<rh->localPosition().y()<<" Time = "<<std::showpos<<rh->tof()<<" -- "<<me0id.rawId()<<" = "<<me0id<<" ]";
             }
         }
 #endif
     };
 
 
     //If we arent doing collisions, do a single iteration
     if(!doCollisions){
         doDisplaced();
         printSegments();
         return segments;
     }
 
     //Iteration 1: STD processing
     doStd();
 
     if(false){
         //How the CSC algorithm ~does iterations. for now not considering
         //displaced muons will not worry about it  later
         //Iteration 2a: If we don't allow wide segments simply do displaced
         // Or if we already found a segment simply skip to displaced
         if(!allowWideSegments || !segments.empty()){
             doDisplaced();
             return segments;
         }
         //doWide();
         doDisplaced();
     }
     printSegments();
     return segments;
 }

void ME0SegAlgoRU::tryAddingHitsToSegment	(	const float	maxTOF,
		const float	maxETA,
		const float	maxPhi,
		const float	maxChi2,
		std::unique_ptr< MuonSegFit > &	current_fit,
		HitAndPositionPtrContainer &	proto_segment,
		const BoolContainer &	used,
		HitAndPositionContainer::const_iterator	i1,
		HitAndPositionContainer::const_iterator	i2
	)		const

private

Definition at line 298 of file ME0SegAlgoRU.cc.

References areHitsConsistentInTime(), compareProtoSegment(), hasHitOnLayer(), increaseProtoSegment(), and isHitNearSegment().

Referenced by lookForSegments(), and ~ME0SegAlgoRU().

                                                                                                                              {
     // Iterate over the layers with hits in the chamber
     // Skip the layers containing the segment endpoints
     // Test each hit on the other layers to see if it is near the segment
     // If it is, see whether there is already a hit on the segment from the same layer
     //    - if so, and there are more than 2 hits on the segment, copy the segment,
     //      replace the old hit with the new hit. If the new segment chi2 is better
     //      then replace the original segment with the new one (by swap)
     //    - if not, copy the segment, add the hit. If the new chi2/dof is still satisfactory
     //      then replace the original segment with the new one (by swap)
 
     //Hits are ordered by layer, "i1" is the inner hit and i2 is the outer hit
     //so possible hits to add must be between these two iterators
     for(auto iH = i1 + 1; iH != i2; ++iH ){
         if(iH->layer == i1->layer) continue;
         if(iH->layer == i2->layer) break;
         if(used[iH->idx]) continue;
         if(!areHitsConsistentInTime(maxTOF,proto_segment,*iH)) continue;
         if (!isHitNearSegment(maxETA,maxPhi,current_fit,proto_segment,*iH)) continue;
         if(hasHitOnLayer(proto_segment,iH->layer))
             compareProtoSegment(current_fit,proto_segment,*iH);
         else
             increaseProtoSegment(maxChi2, current_fit,proto_segment,*iH);
     }
 }

Member Data Documentation

bool ME0SegAlgoRU::allowWideSegments

private

Definition at line 103 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU(), and run().

SegmentParameters ME0SegAlgoRU::displacedParameters

private

Definition at line 106 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU(), and run().

bool ME0SegAlgoRU::doCollisions

private

Definition at line 102 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU(), and run().

const std::string ME0SegAlgoRU::myName

private

Definition at line 101 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU().

SegmentParameters ME0SegAlgoRU::stdParameters

private

Definition at line 105 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU(), and run().

const ME0Chamber* ME0SegAlgoRU::theChamber

private

Definition at line 110 of file ME0SegAlgoRU.h.

Referenced by addUniqueSegments(), globalAtZ(), ME0SegAlgoRU(), and run().

SegmentParameters ME0SegAlgoRU::wideParameters

private

Definition at line 107 of file ME0SegAlgoRU.h.

Referenced by ME0SegAlgoRU().

Classes

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

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