$\chi^2$ fitter which takes into account the pad geometry. More...

#include <TrackFitterSimpleChiSquarePads.h>

Inheritance diagram for marlintpc::TrackFitterSimpleChiSquarePads:

Public Member Functions
	TrackFitterSimpleChiSquarePads (gear::TPCParameters const *gearTPCParameters, double transDefocussing, double longDefocussing, double transDiffusion, double longDiffusion)
	The constructor needs the pad geometry, which is taken grom GEAR. More...

virtual std::string	getRevision () const
	returns the revision of this implementation and of the TrackFitterBase it is derrived from

virtual unsigned char	getFitterType () const
	Information what fitter implementation this is.

virtual DoubleVec	calculateResiduals (EVENT::Track const testTrack, unsigned int testHitNumber, EVENT::Track const referenceTrack=NULL) const
	Return the distance of the hit `testHitNumber` of the testTrack to the point of closest approach on the referenceTrack wrt. the hit. More...

virtual DoubleVec	calculateResiduals (EVENT::TrackerHit const testHit, EVENT::Track const trackWithoutTestHit) const
	Return the distance of the given hit to the test track where this hit has been removed. More...

virtual IMPL::TrackImpl *	fitTrack (EVENT::Track const *seedTrack) const
	Perform the actual fitting. More...

Public Member Functions inherited from marlintpc::TrackFitterSimpleChiSquare
	TrackFitterSimpleChiSquare (double transDefocussing, double longDefocussing, double transDiffusion, double longDiffusion, double zAnode)
	Constructor for $\chi^2$ fitter, initializes the track fitter with the initial values.

virtual double	getTransDefocussing () const
	The transverse defocussing in the readout structure $\sigma_{0,{\mathrm trans}}$ (in mm)

virtual double	getLongDefocussing () const
	The longitudinal defocussing in the readout structure $\sigma_{0,{\mathrm long}}$ (in mm)

virtual double	getTransDiffusionCoef () const
	The transverse diffusion coefficient (in mm/ $\sqrt{\mathrm mm}$ )

virtual double	getLongDiffusionCoef () const
	The longitudinal diffusion coefficient (in mm/ $\sqrt{\mathrm mm}$ )

virtual double	getZAnode () const
	The z coordinate of the readout anode (termination of drift volume)

Public Member Functions inherited from marlintpc::TrackFitterBase
	TrackFitterBase ()
	The Constructor. More...

void	setD0Start (double d0)
	Set a d0 start value for the fit. More...

void	setPhiStart (double phi)
	Set a phi start value for the fit. More...

void	setOmegaStart (double omega)
	Set a omega start value for the fit. More...

void	setTanLambdaStart (double tanLambda)
	Set a tanLambda start value for the fit. More...

void	setZ0Start (double z0)
	Set a z0 start value for the fit. More...

void	setNoZFitFlag (bool noZFit=true)
	Switch to turn off the fitting in z. More...

bool	getNoZFitFlag () const
	Get the noZFit flag.

void	fixD0 (bool fix=true)
	Fix or release d0.

void	fixPhi (bool fix=true)
	Fix or release phi.

void	fixOmega (bool fix=true)
	Fix or release omega.

void	fixTanLambda (bool fix=true)
	Fix or release tanLambda.

void	fixZ0 (bool fix=true)
	Fix or release z0.

Static Public Member Functions
static TrackFitterBase *	getInstance (LCParameters const *parameters)
	Well defined interface to create a new instance of the track fitter.

Static Public Member Functions inherited from marlintpc::TrackFitterSimpleChiSquare
static TrackFitterBase *	getInstance (LCParameters const *parameters)
	Well defined interface to create a new instance of the track fitter.

Static Public Member Functions inherited from marlintpc::TrackFitterBase
static void	setTrackFitterType (unsigned char type, IMPL::TrackImpl *track)
	Convenience function to set bits 16-23 to be the track type.

static unsigned char	getFitterTypeFromTrack (int trackTypeWord)
	Convenicene function to get the tracker type out of the trackType word.

Protected Member Functions
void	initialiseGEARGeometry (gear::TPCParameters const *gearTPCParameters)
	Called from both constructors to set the GEAR information (originally there were two, right now this is obsolete)

Protected Member Functions inherited from marlintpc::TrackFitterBase
double	distanceOnCircle (double phi1, double phi2) const
	Calculate the angular distance on a circle. More...

Protected Attributes
gear::TPCParameters const *	_TPCParameters
	A pointer to the GEAR TPC parameters.

gear::PadRowLayout2D const *	_padLayout
	A pointer to the GEAR pad layout.

int	_padLayoutType
	The type of pad layout (PadRowLayout2D::CARTESIAN or PadRowLayout2D::POLAR)

Protected Attributes inherited from marlintpc::TrackFitterSimpleChiSquare
double	_transDefocussing
	The defocussing and diffusion coefficients.

double	_longDefocussing

double	_transDiffusion

double	_longDiffusion

double	_zAnode
	The z coordinate of the readout anode.

Protected Attributes inherited from marlintpc::TrackFitterBase
double	_d0Start
	The start value for the fit and a flag whether to apply d0Start or the value from the seed track.

bool	_useD0Start

double	_phiStart
	The start value for the fit and a flag whether to apply phiStart or the value from the seed track.

bool	_usePhiStart

double	_omegaStart
	The start value for the fit and a flag whether to apply omegaStart or the value from the seed track.

bool	_useOmegaStart

double	_tanLambdaStart
	The start value for the fit and a flag whether to apply tanLambdaStart or the value from the seed track.

bool	_useTanLambdaStart

double	_z0Start
	The start value for the fit and a flag whether to apply z0Start or the value from the seed track.

bool	_useZ0Start

bool	_noZFit
	flag whether to perform a 2D or a 3D fit

bool	_fixD0
	flags whether to fix a fit parameter

bool	_fixPhi

bool	_fixOmega

bool	_fixTanLambda

bool	_fixZ0

Additional Inherited Members
Static Public Attributes inherited from marlintpc::TrackFitterBase
static const unsigned char	FITFAILEDBIT = 30
	Bit 30 in the TrackType word is fit failed.

Detailed Description

$\chi^2$ fitter which takes into account the pad geometry.

It reimplements the getResiduals functions to calculate the residuals along the pad rows and not perpendicular to the track.

Currently the actual fitter is not implemented yet. But one can instanciate the fitter to use the getResiduals functions, which is reimplemented to caculate the residuals along the pad rows.

Todo:: : Implement the fitter function.

Constructor & Destructor Documentation

marlintpc::TrackFitterSimpleChiSquarePads::TrackFitterSimpleChiSquarePads	(	gear::TPCParameters const *	gearTPCParameters,
		double	transDefocussing,
		double	longDefocussing,
		double	transDiffusion,
		double	longDiffusion
	)

The constructor needs the pad geometry, which is taken grom GEAR.

In addition it requires the defocussing and diffusion parameters for the chi square function.

References marlintpc::TrackFitterSimpleChiSquare::_zAnode, and initialiseGEARGeometry().

Referenced by getInstance().

Member Function Documentation

EVENT::DoubleVec marlintpc::TrackFitterSimpleChiSquarePads::calculateResiduals	(	EVENT::Track const *	testTrack,
		unsigned int	testHitNumber,
		EVENT::Track const *	referenceTrack = `NULL`
	)		const

virtual

Return the distance of the hit testHitNumber of the testTrack to the point of closest approach on the referenceTrack wrt. the hit.

If no referenceTrack is given the distance to the testTrack is returned.

Throws EVENT::DataNotAvailableException in case there is no hit number "testHitNumber" on testHit.

Calls calculateResidual(EVENT::TrackerHit *testHit, EVENT::Track *trackWithoutTestHit) in this implementation.

Reimplemented from marlintpc::TrackFitterBase.

EVENT::DoubleVec marlintpc::TrackFitterSimpleChiSquarePads::calculateResiduals	(	EVENT::TrackerHit const *	testHit,
		EVENT::Track const *	trackWithoutTestHit
	)		const