AlgFitTrackSA Class Reference

#include <AlgFitTrackSA.h>

Inheritance diagram for AlgFitTrackSA:

List of all members.

Public Member Functions
	AlgFitTrackSA ()
	~AlgFitTrackSA ()
virtual void	RunAlg (AlgConfig &ac, CandHandle &ch, CandContext &cx)
Private Member Functions
NtpFitSA	DoFit (const AlgConfig &ac, const TrackContext &trackContext)
Private Attributes
TrackFilter *	fFilter
TrackSegmentMaker *	fSegmentMaker
TrackEstimator *	fEstimator
SwimSwimmer *	fSwimmer

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Detailed Description

AlgFitTrackSA - iterative least squares track fitter. This package provides an iterative least squares track fitter (as described in NuMI-301 note). It works on candidate tracks produced by a track finding (or track fitting) package.

This fitter can be added to the job path by inserting "FitTrackSAListModule::Reco" job module.

Fit results are not saved in the standard ntuple, but can be saved in a NtpFitSA by adding the following job path (or adding to an existing path):

Ntuple record has its own output file so needs its own output module j.Path.Create("Ntp", "NtpFitSAModule::Reco " // create NtpStRecord "Output::Put ");

j.Path("Ntp").Mod("Output").Cmd("DefineStream NtpFitSA NtpFitSARecord"); j.Path("Ntp").Mod("Output").Set("Streams=NtpFitSA"); j.Path("Ntp").Mod("Output").Set("FileName=ntpSA.root");

Author:

Sergei avva@fnal.gov

Definition at line 41 of file AlgFitTrackSA.h.

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Constructor & Destructor Documentation

AlgFitTrackSA::AlgFitTrackSA (   )

Definition at line 60 of file AlgFitTrackSA.cxx. : fFilter(0), fSegmentMaker(0), fEstimator(0), fSwimmer(0) { TracerSA trace("AlgFitTrackSA::AlgFitTrackSA()"); }

AlgFitTrackSA::~AlgFitTrackSA (   )

Definition at line 68 of file AlgFitTrackSA.cxx. References fEstimator, fSegmentMaker, and fSwimmer. { TracerSA trace("AlgFitTrackSA::~AlgFitTrackSA()"); delete fSegmentMaker; fSegmentMaker = 0; delete fEstimator; fEstimator = 0; delete fSwimmer; fSwimmer = 0; }

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Member Function Documentation

NtpFitSA AlgFitTrackSA::DoFit (  const AlgConfig &  ac, const TrackContext &  trackContext )  [private]

main fitting method Definition at line 140 of file AlgFitTrackSA.cxx. References fEstimator, FitContext::fState, fSwimmer, FitStateFactory::GetFitState(), FitStateFactory::Instance(), FitContext::Iterate(), FitContext::MakeNtpFitSA(), FitContext::SetCpu(), and timer(). Referenced by RunAlg(). { TracerSA trace("AlgFitTrackSA::DoFit(const TrackContext& )"); FitContext fit(ac, trackContext, fEstimator, fSwimmer); FitStateFactory& fitStateFactory = FitStateFactory::Instance(); // Start timer TStopwatch timer; timer.Start(); // main loop -> iterate until fit goes into "Final" state while ( fit.fState != fitStateFactory.GetFitState("Final") ) { fit.Iterate(); } fit.Iterate(); // stop timer and save cputime timer.Stop(); fit.SetCpu(timer.CpuTime()); return fit.MakeNtpFitSA(); }

void AlgFitTrackSA::RunAlg (  AlgConfig &  ac, CandHandle &  ch, CandContext &  candTrackContext )  [virtual]

The "main" method of the algorithm (also the only public method) Implements AlgBase. Definition at line 79 of file AlgFitTrackSA.cxx. References CandFitTrackSAHandle::AddNtpFitSA(), TrackEstimator::Config(), TrackSegmentMaker::Config(), TrackFilter::Config(), DoFit(), fEstimator, fFilter, fSegmentMaker, fSwimmer, Registry::GetCharString(), TrackFilterFactory::GetTrackFilter(), TrackContext::GetVldContext(), TrackFilterFactory::Instance(), TrackSegmentMaker::MakeSegments(), MSG, and TrackFilter::Pass(). { TracerSA trace("AlgFitTrackSA::RunAlg(AlgConfig& , CandHandle& , CandContext& )"); CandFitTrackSAHandle& cftsah = (CandFitTrackSAHandle&) ch; TrackContext trackContext(candTrackContext); // todo on first call static Bool_t first = kTRUE; if ( first ) { first = kFALSE; // create filter, segment maker, estimator and swimmer // and configure them // TrackFilter const char* filterName = ac.GetCharString("TrackFilter"); fFilter = TrackFilterFactory::Instance().GetTrackFilter(filterName); fFilter->Config(ac); // Segment Maker fSegmentMaker = new TrackSegmentMakerDummy(); fSegmentMaker->Config(ac); // TrackExtimator fEstimator = new TrackEstimatorFixed(); fEstimator->Config(ac); // Swimmer fSwimmer = new SwimSwimmer(trackContext.GetVldContext()); } // check if the track passes filter (return otherwise) // (don't really have to configure fiter every time) if ( ! fFilter->Pass(trackContext) ) { MSG("FitTrackSA",Msg::kVerbose) << "Track failed cuts, skipping." << "\n"; return; } // split track into segments vector<TrackContext> segments; Int_t status = fSegmentMaker->MakeSegments(trackContext, segments); assert( status == 0 && "Couldn't make segments!" ); // loop over track segments and fit each one typedef vector<TrackContext>::const_iterator TCItr; for ( TCItr it = segments.begin(); it != segments.end(); ++it) { NtpFitSA ntp = DoFit(ac, *it); // Add ntuple to CandFitTrackSA cftsah.AddNtpFitSA(ntp); } // that's all return; }

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Member Data Documentation

TrackEstimator* AlgFitTrackSA::fEstimator [private]

Initial estimation of the track parameters Definition at line 70 of file AlgFitTrackSA.h. Referenced by DoFit(), RunAlg(), and ~AlgFitTrackSA().

TrackFilter* AlgFitTrackSA::fFilter [private]

Determine if want to use this track for fitting Definition at line 60 of file AlgFitTrackSA.h. Referenced by RunAlg().

TrackSegmentMaker* AlgFitTrackSA::fSegmentMaker [private]

(Optionally) split track into segments Definition at line 65 of file AlgFitTrackSA.h. Referenced by RunAlg(), and ~AlgFitTrackSA().

SwimSwimmer* AlgFitTrackSA::fSwimmer [private]

Particle swimmer Definition at line 75 of file AlgFitTrackSA.h. Referenced by DoFit(), RunAlg(), and ~AlgFitTrackSA().

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The documentation for this class was generated from the following files:

• AlgFitTrackSA.h
• AlgFitTrackSA.cxx

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