#include <StandAloneMuonRefitter.h>

Public Types
typedef std::pair< bool, Trajectory >	RefitResult

Public Member Functions
RefitResult	refit (const Trajectory &)

RefitResult	singleRefit (const Trajectory &)
	Refit. More...

	StandAloneMuonRefitter (const edm::ParameterSet &par, const MuonServiceProxy *service)
	Constructor. More...

virtual	~StandAloneMuonRefitter ()
	Destructor. More...

Private Attributes
double	errorRescale

bool	isForceAllIterations

edm::ESHandle< TrajectoryFitter >	theFitter

std::string	theFitterName

double	theMaxFractionOfLostHits

unsigned int	theNumberOfIterations

const MuonServiceProxy *	theService

Detailed Description

Class ti interface the muon system rechits with the standard KF tools.

Date:: 2009/02/10 14:52:25

Revision:: 1.33

Authors: R. Bellan - INFN Torino ricca.nosp@m.rdo..nosp@m.bella.nosp@m.n@ce.nosp@m.rn.ch D. Trocino - INFN Torino danie.nosp@m.le.t.nosp@m.rocin.nosp@m.o@to.nosp@m..infn.nosp@m..it

Class ti interface the muon system rechits with the standard KF tools.

Date:: 2011/01/10 00:16:32

Revision:: 1.51

Authors: R. Bellan - INFN Torino ricca.nosp@m.rdo..nosp@m.bella.nosp@m.n@ce.nosp@m.rn.ch, D. Trocino - INFN Torino danie.nosp@m.le.t.nosp@m.rocin.nosp@m.o@to.nosp@m..infn.nosp@m..it

Definition at line 22 of file StandAloneMuonRefitter.h.

Member Typedef Documentation

typedef std::pair<bool, Trajectory> StandAloneMuonRefitter::RefitResult

Definition at line 24 of file StandAloneMuonRefitter.h.

Constructor & Destructor Documentation

StandAloneMuonRefitter::StandAloneMuonRefitter	(	const edm::ParameterSet &	par,
		const MuonServiceProxy *	service
	)

Constructor.

Definition at line 24 of file StandAloneMuonRefitter.cc.

References errorRescale, edm::ParameterSet::getParameter(), isForceAllIterations, LogDebug, theFitterName, theMaxFractionOfLostHits, and theNumberOfIterations.

                                                                                                       :theService(service) {
   LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "Constructor called." << endl;
 
   theFitterName = par.getParameter<string>("FitterName");
   theNumberOfIterations = par.getParameter<unsigned int>("NumberOfIterations");
   isForceAllIterations = par.getParameter<bool>("ForceAllIterations");
   theMaxFractionOfLostHits = par.getParameter<double>("MaxFractionOfLostHits");
   errorRescale = par.getParameter<double>("RescaleError");
 }

StandAloneMuonRefitter::~StandAloneMuonRefitter ( )

virtual

Destructor.

Definition at line 35 of file StandAloneMuonRefitter.cc.

References LogDebug.

                                                 {
   LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "Destructor called." << endl;
 }

Member Function Documentation

StandAloneMuonRefitter::RefitResult StandAloneMuonRefitter::refit ( const Trajectory & trajectory )

Definition at line 64 of file StandAloneMuonRefitter.cc.

References isForceAllIterations, j, LogDebug, Trajectory::recHits(), singleRefit(), theMaxFractionOfLostHits, and theNumberOfIterations.

Referenced by StandAloneMuonTrajectoryBuilder::trajectories().

                                                                                             {
 
   LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "---------------------------------" << endl;
   LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "Starting refitting loop:" << endl;
 
   unsigned int nSuccess=0;
   unsigned int nOrigHits=trajectory.recHits().size();
   Trajectory lastFitted=trajectory;
   bool allIter=true;
   bool enoughRH=true;
 
   for(unsigned int j=0; j<theNumberOfIterations; ++j) {
 
     StandAloneMuonRefitter::RefitResult singleRefitResult = singleRefit(lastFitted);
     lastFitted = singleRefitResult.second;
     unsigned int nLastHits=lastFitted.recHits().size();
 
     if(!singleRefitResult.first) {
       allIter=false;
       LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "  refit n. " << nSuccess+1 << ": failed" << endl;
       break;
     }
 
     double lostFract= 1 - double(nLastHits)/nOrigHits;
     if(lostFract>theMaxFractionOfLostHits) {
       enoughRH=false;
       LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "  refit n. " << nSuccess+1 << ": too many RH lost" << endl;
       LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "     Survived RecHits: " << nLastHits << "/" << nOrigHits << endl;
       break;
     }
 
     nSuccess++;
     LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "  refit n. " << nSuccess << ": OK" << endl;
     LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << "     Survived RecHits: " << nLastHits << "/" << nOrigHits << endl;
 
   } // end for
 
   LogDebug("Muon|RecoMuon|StandAloneMuonRefitter") << nSuccess << " successful refits!" << endl;
 
   // if isForceAllIterations==true  =>   3 successful refits: (true, refitted trajectory)
   //                                    <3 successful refits: (false, original trajectory)
   // if isForceAllIterations==false =>  >0 successful refits: (true, last refitted trajectory)
   //                                     0 successful refits: (false, original trajectory)
   if(!enoughRH)
     return RefitResult(false, trajectory);
   else if(isForceAllIterations)
     return allIter ? RefitResult(allIter, lastFitted) : RefitResult(allIter, trajectory);
   else
     return nSuccess==0 ? RefitResult(false, trajectory) : RefitResult(true, lastFitted);
 }

StandAloneMuonRefitter::RefitResult StandAloneMuonRefitter::singleRefit ( const Trajectory & trajectory )

Refit.

Definition at line 42 of file StandAloneMuonRefitter.cc.

References errorRescale, Trajectory::lastMeasurement(), Trajectory::recHits(), TrajectoryStateOnSurface::rescaleError(), Trajectory::seed(), theFitter, theFitterName, theService, and TrajectoryMeasurement::updatedState().

Referenced by refit().

                                                                                                   {
   
   theService->eventSetup().get<TrajectoryFitter::Record>().get(theFitterName, theFitter);
 
   vector<Trajectory> refitted;
 
   TrajectoryMeasurement lastTM = trajectory.lastMeasurement();                                      
 
   TrajectoryStateOnSurface firstTsos(lastTM.updatedState());
 
   // Rescale errors before refit, not to bias the result
   firstTsos.rescaleError(errorRescale);
 
   TransientTrackingRecHit::ConstRecHitContainer trajRH = trajectory.recHits();                      
   reverse(trajRH.begin(),trajRH.end());                                                             
   refitted = theFitter->fit(trajectory.seed(), trajRH, firstTsos);                                  
 
   if(!refitted.empty()) return RefitResult(true,refitted.front());
   else return RefitResult(false,trajectory);
 }