marlintpc::TrackFitterSimpleMinimizerProcessor Class Reference

A processor which instantiates a TrackFitterSimpleMinimizer and fits the tracks with it. More...

#include <TrackFitterSimpleMinimizerProcessor.h>

Inheritance diagram for marlintpc::TrackFitterSimpleMinimizerProcessor:

Public Member Functions
	TrackFitterSimpleMinimizerProcessor ()
	Default constructor.
	~TrackFitterSimpleMinimizerProcessor ()
	Destructor.
Processor *	newProcessor ()
	Return a new instance of this processor.
void	init ()
	In this processor the init function set the collection parameters for the track collection.
void	processRunHeader (lcio::LCRunHeader *run)
	Called once per run to process the event's header.
virtual void	processEvent (lcio::LCEvent *evt)
	Process event requests a track fitter from the TrackFitterFactory for each event (to update possible conditions data). More...
virtual void	check (lcio::LCEvent *evt)
	Called for every event - right after processEvent() has been called.
virtual void	end ()
	Called after data processing for clean up in the inverse order of the init() method so that resources allocated in the first processor also will be available for all following processors.

Protected Member Functions
std::vector< double >	calculateMeanAndRMS (EVENT::Track *track, TrackFitterBase *fitter)
	Returns meanXY, meanZ, rmsXY, rmsZ (in this order)

Protected Attributes
std::string	_input_seed_tracks_collection_name
	The name of the input collection of seed tracks.
std::string	_output_tracks_collection_name
	The name of the output collection with the fitted tracks.
bool	_writeOutput
int	_maxIterations
bool	_rejectOutliers
float	_cutValue
EVENT::LCParameters *	_trackCollectionParameters

Detailed Description

A processor which instantiates a TrackFitterSimpleMinimizer and fits the tracks with it.

Optionally an itterative outlier rejection can be performed. The residual distribution is calculated from the hits on the track and a CutValue * RMS cut is applied. Afterwards the track is refit. This procedure is repeated until the cut converges or the MaxIterations is reached.

Author

M. Killenberg

Input - Prerequisites

• A collection of track candidates (lcio::Tracks) containing the TrackerHits.
  Note: The LCIO::TRBIT_HITS flag has to be set when this collection is created so the hits are stored in the track.

Output

• Collection of fitted tracks.

Parameters

InputSeedTracks	The the name of the input collection of track candidates (default: TPCSeedTracks)
OutputTracks	The name of the output collection with the fitted tracks (default: TPCTracks)
WriteOutputToStorage	If true the output collection is written to file (default: true) *
MaxIterations	Maximum number of iterations for outlier rejection (default: 10)
CutValue	Cut outliers wich are _cutValue*RMS away from the fitted track, optional: Setting this value turns on this feature.

Member Function Documentation

void marlintpc::TrackFitterSimpleMinimizerProcessor::processEvent ( lcio::LCEvent *  evt )

virtual

Process event requests a track fitter from the TrackFitterFactory for each event (to update possible conditions data).

Afterwards it loops all tracks and fits them.

References _input_seed_tracks_collection_name, _output_tracks_collection_name, calculateMeanAndRMS(), marlintpc::TrackFitterBase::calculateResiduals(), marlintpc::TrackFitterBase::fitTrack(), marlintpc::TrackFitterBase::getFitterType(), marlintpc::TrackFitterFactory::getTrackFitter(), and marlintpc::TrackFitterBase::FitterTypes::SIMPLEMINIMIZER.

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

• TrackFitterSimpleMinimizerProcessor.h
• TrackFitterSimpleMinimizerProcessor.cc