TrackFitObject Class Reference

Abstract base class for track objects of kinematic fits. More...

#include <TrackFitObject.h>

Inheritance diagram for TrackFitObject:

[legend]Collaboration diagram for TrackFitObject:


Public Member Functions
	TrackFitObject (const char *name_=0)
	Default constructor.
	TrackFitObject (const TrackFitObject &rhs)
	Copy Constructor.
TrackFitObject &	operator= (const TrackFitObject &rhs)
	Assignment.
virtual	~TrackFitObject ()
	Destructor.
virtual bool	setParam (int ilocal, double par_, bool measured_, bool fixed_=false)
	Set value and measured flag of parameter ilocal; return=success.
virtual bool	setParam (int ilocal, double par_)
	Set value of parameter ilocal; return=success.
virtual bool	setParameters (int ivertex, const ThreeVector &vertex, const FourVector &momentum, double charge_)=0
	Set parameters such that track passes through a vertex with a given 4-momentum; return=success.
virtual bool	setMParam (int ilocal, double mpar_)
	Set measured value of parameter ilocal; return=success.
virtual bool	setError (int ilocal, double err_)
	Set error of parameter ilocal; return=success.
virtual bool	setCov (int ilocal, int jlocal, double cov_)
	Set covariance of parameters ilocal and jlocal; return=success.
virtual bool	setGlobalParNum (int ilocal, int iglobal)
virtual bool	fixParam (int ilocal, bool fix=true)
	Fix a parameter (fix=true), or release it (fix=false).
virtual double	getParam (int i) const
	Get current value of parameter ilocal.
virtual double	getMParam (int i) const
	Get measured value of parameter ilocal.
virtual double	getError (int ilocal) const
	Get error of parameter ilocal.
virtual double	getCov (int ilocal, int jlocal) const
	Get covariance between parameters ilocal and jlocal.
virtual bool	isParamMeasured (int ilocal) const
	Get measured flag for parameter i.
virtual bool	isParamFixed (int ilocal) const
	Get fixed flag for parameter i.
virtual int	getGlobalParNum (int ilocal) const
	Get global parameter number of parameter ilocal.
virtual int	getNPar () const=0
	Get number of parameters of this FitObject.
virtual const char *	getName () const
	Get object's name.
virtual void	setName (const char *name_)
	Set object's name.
virtual void	getTrajectoryPointEx (double s, ThreeVector &p) const=0
	Get point along trajectory into existing 3-vector.
virtual ThreeVector	getTrajectoryPoint (double s) const
	Get point along trajectory.
virtual void	getVertexEx (int ivertex, ThreeVector &p) const=0
	Get start (i=0) or stop (i=1) vertex into existing 3-vector.
virtual ThreeVector	getVertex (int ivertex) const
	Get start (i=0) or stop (i=1) vertex.
virtual void	setVertex (int ivertex, const TwoVector &v)=0
	Set start (i=0) or stop (i=1) vertex to a point as close as possible to given point.
virtual void	getTrajectoryDerivativeEx (double s, int ilocal, ThreeVector &p) const=0
	Get derivative of trajectory w.r.t. parameter ilocal into existing 3-vector.
virtual ThreeVector	getTrajectoryDerivative (double s, int ilocal) const
	Get derivative of trajectory w.r.t. parameter ilocal.
virtual void	getVertexDerivativeEx (int ivertex, int ilocal, ThreeVector &p) const=0
	Get derivative of vertex w.r.t. parameter ilocal into existing 3-vector.
virtual ThreeVector	getVertexDerivative (int ivertex, int ilocal) const
	Get derivative of vertex w.r.t. parameter ilocal.
virtual void	getMomentumAtTrajectoryEx (double s, FourVector &p) const=0
	Get momentum along trajectory into existing 4-vector.
virtual FourVector	getMomentumAtTrajectory (double s) const
	Get momentum along trajectory.
virtual void	getMomentumEx (int ivertex, FourVector &p) const=0
	Get momentum at vertex into existing 4-vector.
virtual FourVector	getMomentum (int ivertex) const
	Get momentum at vertex.
virtual double	getCharge () const=0
	Get charge in units of e.
virtual double	getMass () const=0
	Get mass in GeV.
virtual void	getMomentumDerivativeAtTrajectoryEx (double s, int ilocal, FourVector &p) const=0
	Get momentum along trajectory into existing 4-vector.
virtual FourVector	getMomentumDerivativeAtTrajectory (double s, int ilocal) const
	Get momentum along trajectory.
virtual void	getMomentumDerivativeEx (int ivertex, int ilocal, FourVector &p) const=0
	Get derivative of momentum w.r.t. parameter ilocal into existing 4-vector.
virtual FourVector	getMomentumDerivative (int ivertex, int ilocal) const
	Get derivative of momentum w.r.t. parameter ilocal.
virtual double	getArcLength (int ivertex) const=0
	Get s (arclength in r/phi) of vertex ivertex.
virtual void	addToGlobCov (double *globvcov, int idim) const
virtual double	getChi2 () const
	Get chi squared from measured and fitted parameters.
virtual double	getDChi2DParam (int ilocal) const=0
	Get derivative of chi squared w.r.t. parameter ilocal.
virtual double	getD2Chi2DParam2 (int ilocal, int jlocal) const=0
	Get second derivative of chi squared w.r.t. parameters ilocal1 and ilocal2.
virtual void	addToGlobalChi2DerMatrix (int idim, double *M) const=0
	Add derivatives of chi squared to global covariance matrix.
virtual void	addToGlobalDerMatrix (int idim, double c, double *M) const=0
	Add derivatives to global covariance matrix.
virtual JBLHelix	getTangentialHelix (double s)=0
	Get helix that is tangential at a certain arc length s.
virtual std::ostream &	print (std::ostream &os) const
	print object to ostream
virtual void	invalidateCache ()
	Invalidate the cache.
virtual bool	fixVertexParam (int ivertex, bool fix=true)=0
	Fix parameter(s) pertaining to a vertex, or release it.
virtual bool	releaseVertexParam (int ivertex)
	Release parameter(s) pertaining to a vertex.
virtual void	printCov (std::ostream &os) const
	Print Covariance matrix.
Static Public Member Functions
double	setBfield (double bfield_)
	Set the B field for all tracks.
double	getBfield ()
	Get the B field for all tracks (in Tesla).
Static Public Attributes
double	bfield = 1.14
	Global B field in Tesla(!).
Protected Types
enum	{ NPARMAX = 8 }
	Maximum number of parameters. More...
Protected Member Functions
virtual void	initCov ()
	Init covariance matrix to dummy values.
virtual void	checkCov ()
	Check covariance matrix to dummy values.
virtual bool	calculateCovInv () const
	Calculate the inverse of the covariance matrix.
virtual void	calculateChi2 () const
	Calculate chi2.
virtual void	copy (const TrackFitObject &source)
	Copy another TrackFitObject.
Protected Attributes
double	par [NPARMAX]
	fit parameters
double	mpar [NPARMAX]
	measured parameters
double	err [NPARMAX]
	errors
bool	measured [NPARMAX]
	measured flag
bool	fixed [NPARMAX]
	fixed flag
int	globalParNum [NPARMAX]
	global paramter number for each parameter
double	cov [NPARMAX][NPARMAX]
	local covariance matrix
double	covinv [NPARMAX][NPARMAX]
	inverse of local covariance matrix
bool	cachevalid
	flag for valid cache
bool	covinvvalid
	flag for valid inverse covariance matrix
double	chi2
	chi^2
double	resid [NPARMAX]
	residuals
bool	chi2contr [NPARMAX]
	contributes to chi2?
char *	name
	object name (name string must be allocated and deleted outside object!)

Detailed Description

Abstract base class for track objects of kinematic fits.

A TrackFitObject has usually 5 track parameters, e.g. (kappa, phi0, theta, dca, z0) for a helix, plus one or two parameters for a start and a possible stop arc length, and a mass. Therefore, the base class provides space to store NPARMAX=8 parameters.

A TrackFitObject is able to calculate a point on its trajectory for a given arclength s, a tangent vector at this point, and a momentum. In general, it will need to know the b-field (assumed to be along z) for this. The b-field can be set as static value for the whole TrackFitObject class.

A TrackFitObject can also return a JBLHelix object that represents a tangential helix at a certain arc length s. The helix object is able to find a point where the helix comes close to another helix, which is needed to determine starting values for fits.

Author:Benno List, Jenny List

Date: 2007/09/13 13:33:06

Author: blist

Changelog:

17.11.04 BL First version
5.1.05 BL: Add getTangentialHelix

Definition at line 60 of file TrackFitObject.h.

Member Enumeration Documentation

anonymous enum [protected]

Maximum number of parameters.

Enumeration values:

NPARMAX

Definition at line 301 of file TrackFitObject.h.

Constructor & Destructor Documentation

TrackFitObject::TrackFitObject ( const char * name_ = 0 )

Default constructor.

Parameters:

name_ Optional name

Definition at line 26 of file TrackFitObject.C.
References cov, covinv, err, fixed, globalParNum, measured, mpar, NPARMAX, par, and setName().

TrackFitObject::TrackFitObject ( const TrackFitObject & rhs )

Copy Constructor.

Parameters:

rhs Source object

Definition at line 39 of file TrackFitObject.C.
References copy().

TrackFitObject::~TrackFitObject ( ) [virtual]

Destructor.

Definition at line 68 of file TrackFitObject.C.
References name.

Member Function Documentation

virtual void TrackFitObject::addToGlobalChi2DerMatrix ( int idim,

double * M

) const [pure virtual]

Add derivatives of chi squared to global covariance matrix.

Implements BaseFitObject.
Implemented in ChargedParticleTrack, and NeutralParticleTrack.

virtual void TrackFitObject::addToGlobalDerMatrix ( int idim,

double c,

double * M

) const [pure virtual]

Add derivatives to global covariance matrix.

Parameters:

idim Dimension of global derivative matrix

c Constant by which multiply contribution

M Existing global derivative matrix

Implements BaseFitObject.
Implemented in ChargedParticleTrack, and NeutralParticleTrack.

void TrackFitObject::addToGlobCov ( double * globvcov,

int idim

) const [virtual]

Add covariance matrix elements to global covariance matrix of size idim x idim
Parameters:

glcov Covariance matrix

idim Dimension of covariance matrix

Implements BaseFitObject.
Reimplemented in NeutralParticleTrack.
Definition at line 254 of file TrackFitObject.C.
References cov, getGlobalParNum(), getNPar(), isParamFixed(), isParamMeasured(), and NPARMAX.

void TrackFitObject::calculateChi2 ( ) const [protected, virtual]

Calculate chi2.

Definition at line 359 of file TrackFitObject.C.
References calculateCovInv(), chi2, chi2contr, covinv, covinvvalid, getNPar(), isParamFixed(), isParamMeasured(), mpar, par, and resid.
Referenced by getChi2(), NeutralParticleTrack::updateCache(), and ChargedParticleTrack::updateCache().

bool TrackFitObject::calculateCovInv ( ) const [protected, virtual]

Calculate the inverse of the covariance matrix.

Definition at line 333 of file TrackFitObject.C.
References cov, covinv, covinvvalid, dsinv(), getNPar(), isParamMeasured(), and NPARMAX.
Referenced by calculateChi2(), ChargedParticleTrack::ChargedParticleTrack(), and checkCov().

void TrackFitObject::checkCov ( ) [protected, virtual]

Check covariance matrix to dummy values.

Definition at line 284 of file TrackFitObject.C.
References calculateCovInv(), cov, covinvvalid, getNPar(), and isParamMeasured().
Referenced by NeutralParticleTrack::initCov(), and ChargedParticleTrack::initCov().

void TrackFitObject::copy ( const TrackFitObject & source ) [protected, virtual]

Copy another TrackFitObject.

Parameters:

source Source object

Definition at line 49 of file TrackFitObject.C.
References cachevalid, cov, covinvvalid, err, fixed, globalParNum, measured, mpar, name, NPARMAX, par, and setName().
Referenced by operator=(), and TrackFitObject().

bool TrackFitObject::fixParam ( int ilocal,

bool fix = true

) [virtual]

Fix a parameter (fix=true), or release it (fix=false).

Parameters:

ilocal Local parameter number

fix fix if true, release if false

Implements BaseFitObject.
Definition at line 146 of file TrackFitObject.C.
References fixed, and NPARMAX.
Referenced by NeutralParticleTrack::fixVertexParam(), ChargedParticleTrack::fixVertexParam(), and K0Event::genEvent().

virtual bool TrackFitObject::fixVertexParam ( int ivertex,

bool fix = true

) [pure virtual]

Fix parameter(s) pertaining to a vertex, or release it.

Parameters:

ivertex Vertex number: 0=start, 1=stop

fix fix if true, release if false

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by K0Event::fitEvent(), H1K0Event2::fitEvent(), H1K0Event::fitEvent(), K0Event::genEvent(), and releaseVertexParam().

virtual double TrackFitObject::getArcLength ( int ivertex ) const [pure virtual]

Get s (arclength in r/phi) of vertex ivertex.

Parameters:

ivertex Vertex number: 0=start, 1=stop

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

double TrackFitObject::getBfield ( ) [inline, static]

Get the B field for all tracks (in Tesla).

Definition at line 340 of file TrackFitObject.h.
References bfield.

virtual double TrackFitObject::getCharge ( ) const [pure virtual]

Get charge in units of e.

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

double TrackFitObject::getChi2 ( ) const [virtual]

Get chi squared from measured and fitted parameters.

Implements BaseFitObject.
Definition at line 328 of file TrackFitObject.C.
References calculateChi2(), and chi2.

double TrackFitObject::getCov ( int ilocal,

int jlocal

) const [virtual]

Get covariance between parameters ilocal and jlocal.

Parameters:

ilocal Local parameter number 1

jlocal Local parameter number 2

Implements BaseFitObject.
Definition at line 170 of file TrackFitObject.C.
References cov, and NPARMAX.

virtual double TrackFitObject::getD2Chi2DParam2 ( int ilocal,

int jlocal

) const [pure virtual]

Get second derivative of chi squared w.r.t. parameters ilocal1 and ilocal2.

Parameters:

ilocal Local parameter number 1

jlocal Local parameter number 2

Implements BaseFitObject.
Implemented in ChargedParticleTrack, and NeutralParticleTrack.

virtual double TrackFitObject::getDChi2DParam ( int ilocal ) const [pure virtual]

Get derivative of chi squared w.r.t. parameter ilocal.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Implemented in ChargedParticleTrack, and NeutralParticleTrack.

double TrackFitObject::getError ( int ilocal ) const [virtual]

Get error of parameter ilocal.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 165 of file TrackFitObject.C.
References cov, and NPARMAX.
Referenced by main().

int TrackFitObject::getGlobalParNum ( int ilocal ) const [virtual]

Get global parameter number of parameter ilocal.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 150 of file TrackFitObject.C.
References getNPar(), and globalParNum.
Referenced by TrackMomentumConstraint::add1stDerivativesToMatrix(), addToGlobCov(), NeutralParticleTrack::addToGlobCov(), and VertexConstraint::getDerivatives().

virtual double TrackFitObject::getMass ( ) const [pure virtual]

Get mass in GeV.

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

FourVector TrackFitObject::getMomentum ( int ivertex ) const [virtual]

Get momentum at vertex.

Parameters:

i Vertex number: 0=start, 1=stop

Definition at line 232 of file TrackFitObject.C.
References getMomentumEx().
Referenced by H1K0Event::H1K0Event(), H1K0Event2::H1K0Event2(), main(), and print().

FourVector TrackFitObject::getMomentumAtTrajectory ( double s ) const [virtual]

Get momentum along trajectory.

Parameters:

s Arc length

Definition at line 226 of file TrackFitObject.C.
References getMomentumAtTrajectoryEx().

virtual void TrackFitObject::getMomentumAtTrajectoryEx ( double s,

FourVector & p

) const [pure virtual]

Get momentum along trajectory into existing 4-vector.

Parameters:

s Arc length

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getMomentumAtTrajectory().

FourVector TrackFitObject::getMomentumDerivative ( int ivertex,

int ilocal

) const [virtual]

Get derivative of momentum w.r.t. parameter ilocal.

Parameters:

i Vertex number: 0=start, 1=stop

ilocal Local parameter number

Definition at line 246 of file TrackFitObject.C.
References getMomentumDerivativeEx().

FourVector TrackFitObject::getMomentumDerivativeAtTrajectory ( double s,

int ilocal

) const [virtual]

Get momentum along trajectory.

Parameters:

s Arc length

ilocal Local parameter number

Definition at line 238 of file TrackFitObject.C.
References getMomentumDerivativeAtTrajectoryEx().

virtual void TrackFitObject::getMomentumDerivativeAtTrajectoryEx ( double s,

int ilocal,

FourVector & p

) const [pure virtual]

Get momentum along trajectory into existing 4-vector.

Parameters:

s Arc length

ilocal Local parameter number

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getMomentumDerivativeAtTrajectory().

virtual void TrackFitObject::getMomentumDerivativeEx ( int ivertex,

int ilocal,

FourVector & p

) const [pure virtual]

Get derivative of momentum w.r.t. parameter ilocal into existing 4-vector.

Parameters:

ivertex Vertex number: 0=start, 1=stop

ilocal Local parameter number

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getMomentumDerivative().

virtual void TrackFitObject::getMomentumEx ( int ivertex,

FourVector & p

) const [pure virtual]

Get momentum at vertex into existing 4-vector.

Parameters:

ivertex Vertex number: 0=start, 1=stop

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getMomentum().

double TrackFitObject::getMParam ( int i ) const [virtual]

Get measured value of parameter ilocal.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 159 of file TrackFitObject.C.
References isParamMeasured(), mpar, and NPARMAX.

const char * TrackFitObject::getName ( ) const [virtual]

Get object's name.

Reimplemented from BaseFitObject.
Definition at line 118 of file TrackFitObject.C.
References name.
Referenced by print().

virtual int TrackFitObject::getNPar ( ) const [pure virtual]

Get number of parameters of this FitObject.

Implements BaseFitObject.
Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by TrackMomentumConstraint::add1stDerivativesToMatrix(), addToGlobCov(), calculateChi2(), calculateCovInv(), checkCov(), VertexConstraint::getDerivatives(), TTVertexConstraint::getDerivatives(), getGlobalParNum(), initCov(), and printCov().

double TrackFitObject::getParam ( int i ) const [virtual]

Get current value of parameter ilocal.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 155 of file TrackFitObject.C.
References NPARMAX, and par.
Referenced by K0Event::createSmearedChargedTrack(), and main().

virtual JBLHelix TrackFitObject::getTangentialHelix ( double s ) [pure virtual]

Get helix that is tangential at a certain arc length s.

Parameters:

s Arc length

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

ThreeVector TrackFitObject::getTrajectoryDerivative ( double s,

int ilocal

) const [virtual]

Get derivative of trajectory w.r.t. parameter ilocal.

Parameters:

s Arc length

ilocal Local parameter number

Definition at line 210 of file TrackFitObject.C.
References getTrajectoryDerivativeEx().

virtual void TrackFitObject::getTrajectoryDerivativeEx ( double s,

int ilocal,

ThreeVector & p

) const [pure virtual]

Get derivative of trajectory w.r.t. parameter ilocal into existing 3-vector.

Parameters:

s Arc length

ilocal Local parameter number

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getTrajectoryDerivative().

ThreeVector TrackFitObject::getTrajectoryPoint ( double s ) const [virtual]

Get point along trajectory.

Parameters:

s Arc length

Definition at line 198 of file TrackFitObject.C.
References getTrajectoryPointEx().
Referenced by main().

virtual void TrackFitObject::getTrajectoryPointEx ( double s,

ThreeVector & p

) const [pure virtual]

Get point along trajectory into existing 3-vector.

Parameters:

s Arc length

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getTrajectoryPoint().

ThreeVector TrackFitObject::getVertex ( int ivertex ) const [virtual]

Get start (i=0) or stop (i=1) vertex.

Parameters:

i vertex number: 0=start, 1=stop

Definition at line 204 of file TrackFitObject.C.
References getVertexEx().
Referenced by VertexConstraint::getValue(), TTVertexConstraint::getValue(), main(), and print().

ThreeVector TrackFitObject::getVertexDerivative ( int ivertex,

int ilocal

) const [virtual]

Get derivative of vertex w.r.t. parameter ilocal.

Parameters:

i vertex number: 0=start, 1=stop

ilocal Local parameter number

Definition at line 218 of file TrackFitObject.C.
References getVertexDerivativeEx().
Referenced by VertexConstraint::getDerivatives().

virtual void TrackFitObject::getVertexDerivativeEx ( int ivertex,

int ilocal,

ThreeVector & p

) const [pure virtual]

Get derivative of vertex w.r.t. parameter ilocal into existing 3-vector.

Parameters:

ivertex vertex number: 0=start, 1=stop

ilocal Local parameter number

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getVertexDerivative().

virtual void TrackFitObject::getVertexEx ( int ivertex,

ThreeVector & p

) const [pure virtual]

Get start (i=0) or stop (i=1) vertex into existing 3-vector.

Parameters:

ivertex Vertex number (0: start, 1: stop)

p Target 3-vector

Implemented in ChargedParticleTrack, and NeutralParticleTrack.
Referenced by getVertex().

void TrackFitObject::initCov ( ) [protected, virtual]

Init covariance matrix to dummy values.

Definition at line 274 of file TrackFitObject.C.
References cov, covinvvalid, and getNPar().
Referenced by ChargedParticleTrack::ChargedParticleTrack(), NeutralParticleTrack::initCov(), ChargedParticleTrack::initCov(), and NeutralParticleTrack::NeutralParticleTrack().

void TrackFitObject::invalidateCache ( ) [virtual]

Invalidate the cache.

Definition at line 194 of file TrackFitObject.C.
References cachevalid.
Referenced by setCov(), setError(), setMParam(), setParam(), NeutralParticleTrack::setParam(), and ChargedParticleTrack::setParam().

bool TrackFitObject::isParamFixed ( int ilocal ) const [virtual]

Get fixed flag for parameter i.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 181 of file TrackFitObject.C.
References fixed, and NPARMAX.
Referenced by TrackMomentumConstraint::add1stDerivativesToMatrix(), addToGlobCov(), NeutralParticleTrack::addToGlobCov(), calculateChi2(), VertexConstraint::getDerivatives(), setGlobalParNum(), NeutralParticleTrack::setParameters(), and ChargedParticleTrack::setParameters().

bool TrackFitObject::isParamMeasured ( int ilocal ) const [virtual]

Get measured flag for parameter i.

Parameters:

ilocal Local parameter number

Implements BaseFitObject.
Definition at line 176 of file TrackFitObject.C.
References measured, and NPARMAX.
Referenced by addToGlobCov(), NeutralParticleTrack::addToGlobCov(), calculateChi2(), calculateCovInv(), checkCov(), and getMParam().

TrackFitObject & TrackFitObject::operator= ( const TrackFitObject & rhs )

Assignment.

Parameters:

rhs Source object

Definition at line 44 of file TrackFitObject.C.
References copy().

std::ostream & TrackFitObject::print ( std::ostream & os ) const [virtual]

print object to ostream

Parameters:

os Output stream

Implements BaseFitObject.
Definition at line 186 of file TrackFitObject.C.
References getMomentum(), getName(), getVertex(), and BaseFitObject::printParams().
Referenced by operator<<().

void TrackFitObject::printCov ( std::ostream & os ) const [virtual]

Print Covariance matrix.

Parameters:

os Output stream

Definition at line 381 of file TrackFitObject.C.
References cov, getNPar(), BaseFitObject::getParamName(), and name.

bool TrackFitObject::releaseVertexParam ( int ivertex ) [virtual]

Release parameter(s) pertaining to a vertex.

Parameters:

ivertex Vertex number: 0=start, 1=stop

Definition at line 377 of file TrackFitObject.C.
References fixVertexParam().

double TrackFitObject::setBfield ( double bfield_ ) [static]

Set the B field for all tracks.

Parameters:

bfield_ New Value of B field (in Tesla)

Definition at line 136 of file TrackFitObject.C.
References bfield.
Referenced by main().

bool TrackFitObject::setCov ( int ilocal,

int jlocal,

double cov_

) [virtual]

Set covariance of parameters ilocal and jlocal; return=success.

Parameters:

ilocal Local parameter number

jlocal Local parameter number

cov_ New error value

Implements BaseFitObject.
Definition at line 108 of file TrackFitObject.C.
References cov, covinvvalid, invalidateCache(), and NPARMAX.

bool TrackFitObject::setError ( int ilocal,

double err_

) [virtual]

Set error of parameter ilocal; return=success.

Parameters:

ilocal Local parameter number

err_ New error value

Implements BaseFitObject.
Definition at line 99 of file TrackFitObject.C.
References cov, covinvvalid, invalidateCache(), and NPARMAX.
Referenced by K0Event::createSmearedChargedTrack().

bool TrackFitObject::setGlobalParNum ( int ilocal,

int iglobal

) [virtual]

Set number of parameter ilocal in global list return true signals OK
Parameters:

ilocal Local parameter number

iglobal Global parameter number

Implements BaseFitObject.
Definition at line 140 of file TrackFitObject.C.
References globalParNum, isParamFixed(), and NPARMAX.

bool TrackFitObject::setMParam ( int ilocal,

double mpar_

) [virtual]

Set measured value of parameter ilocal; return=success.

Parameters:

i Local parameter number

mpar_ New parameter value

Implements BaseFitObject.
Definition at line 90 of file TrackFitObject.C.
References invalidateCache(), mpar, and NPARMAX.
Referenced by ChargedParticleTrack::ChargedParticleTrack(), and NeutralParticleTrack::NeutralParticleTrack().

void TrackFitObject::setName ( const char * name_ ) [virtual]

Set object's name.

Parameters:

name_ Pointer to new name string

Reimplemented from BaseFitObject.
Definition at line 122 of file TrackFitObject.C.
References name.
Referenced by copy(), K0Event::genEvent(), and TrackFitObject().

bool TrackFitObject::setParam ( int ilocal,

double par_

) [virtual]

Set value of parameter ilocal; return=success.

Parameters:

i Local parameter number

par_ New parameter value

Implements BaseFitObject.
Reimplemented in ChargedParticleTrack, and NeutralParticleTrack.
Definition at line 82 of file TrackFitObject.C.
References invalidateCache(), NPARMAX, and par.

bool TrackFitObject::setParam ( int ilocal,

double par_,

bool measured_,

bool fixed_ = false

) [virtual]

Set value and measured flag of parameter ilocal; return=success.

Parameters:

i Local parameter number

par_ New parameter value

measured_ New "measured" flag

fixed_ New "fixed" flag

Implements BaseFitObject.
Reimplemented in ChargedParticleTrack, and NeutralParticleTrack.
Definition at line 73 of file TrackFitObject.C.
References fixed, invalidateCache(), measured, and NPARMAX.

virtual bool TrackFitObject::setParameters ( int ivertex,

const ThreeVector & vertex,

const FourVector & momentum,

double charge_

) [pure virtual]

Set parameters such that track passes through a vertex with a given 4-momentum; return=success.

Parameters:

ivertex Vertex number: 0=start, 1=stop

vertex Vertex position

momentum Four-momentum

charge_ Charge (signed, in units of e)

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

virtual void TrackFitObject::setVertex ( int ivertex,

const TwoVector & v

) [pure virtual]

Set start (i=0) or stop (i=1) vertex to a point as close as possible to given point.

Parameters:

ivertex Vertex number: 0=start, 1=stop

v Vertex position

Implemented in ChargedParticleTrack, and NeutralParticleTrack.

Member Data Documentation

double TrackFitObject::bfield = 1.14 [static]

Global B field in Tesla(!).

Definition at line 133 of file TrackFitObject.C.
Referenced by ChargedParticleTrack::ChargedParticleTrack(), K0Event::createSmearedChargedTrack(), getBfield(), setBfield(), ChargedParticleTrack::setParameters(), and ChargedParticleTrack::updateCache().

bool TrackFitObject::cachevalid [mutable, protected]

flag for valid cache

Definition at line 320 of file TrackFitObject.h.
Referenced by copy(), NeutralParticleTrack::getMomentumAtTrajectoryEx(), ChargedParticleTrack::getMomentumAtTrajectoryEx(), NeutralParticleTrack::getMomentumDerivativeAtTrajectoryEx(), ChargedParticleTrack::getMomentumDerivativeAtTrajectoryEx(), NeutralParticleTrack::getTrajectoryDerivativeEx(), ChargedParticleTrack::getTrajectoryDerivativeEx(), NeutralParticleTrack::getTrajectoryPointEx(), ChargedParticleTrack::getTrajectoryPointEx(), invalidateCache(), NeutralParticleTrack::setVertex(), ChargedParticleTrack::setVertex(), NeutralParticleTrack::updateCache(), and ChargedParticleTrack::updateCache().

double TrackFitObject::chi2 [mutable, protected]

chi^2

Definition at line 325 of file TrackFitObject.h.
Referenced by calculateChi2(), and getChi2().

bool TrackFitObject::chi2contr[NPARMAX] [mutable, protected]

contributes to chi2?

Definition at line 327 of file TrackFitObject.h.
Referenced by calculateChi2().

double TrackFitObject::cov[NPARMAX][NPARMAX] [protected]

local covariance matrix

Definition at line 316 of file TrackFitObject.h.
Referenced by addToGlobCov(), NeutralParticleTrack::addToGlobCov(), calculateCovInv(), checkCov(), copy(), getCov(), getError(), initCov(), NeutralParticleTrack::initCov(), ChargedParticleTrack::initCov(), printCov(), setCov(), setError(), and TrackFitObject().

double TrackFitObject::covinv[NPARMAX][NPARMAX] [mutable, protected]

inverse of local covariance matrix

Definition at line 318 of file TrackFitObject.h.
Referenced by calculateChi2(), calculateCovInv(), and TrackFitObject().

bool TrackFitObject::covinvvalid [mutable, protected]

flag for valid inverse covariance matrix

Definition at line 322 of file TrackFitObject.h.
Referenced by calculateChi2(), calculateCovInv(), checkCov(), copy(), initCov(), NeutralParticleTrack::initCov(), ChargedParticleTrack::initCov(), setCov(), and setError().

double TrackFitObject::err[NPARMAX] [protected]

errors

Definition at line 308 of file TrackFitObject.h.
Referenced by copy(), and TrackFitObject().

bool TrackFitObject::fixed[NPARMAX] [protected]

fixed flag

Definition at line 312 of file TrackFitObject.h.
Referenced by copy(), fixParam(), isParamFixed(), setParam(), NeutralParticleTrack::setParam(), ChargedParticleTrack::setParam(), and TrackFitObject().

int TrackFitObject::globalParNum[NPARMAX] [protected]

global paramter number for each parameter

Definition at line 314 of file TrackFitObject.h.
Referenced by copy(), getGlobalParNum(), setGlobalParNum(), and TrackFitObject().

bool TrackFitObject::measured[NPARMAX] [protected]

measured flag

Definition at line 310 of file TrackFitObject.h.
Referenced by copy(), isParamMeasured(), setParam(), NeutralParticleTrack::setParam(), ChargedParticleTrack::setParam(), and TrackFitObject().

double TrackFitObject::mpar[NPARMAX] [protected]

measured parameters

Definition at line 306 of file TrackFitObject.h.
Referenced by calculateChi2(), copy(), getMParam(), setMParam(), and TrackFitObject().

char* TrackFitObject::name [protected]

object name (name string must be allocated and deleted outside object!)

Definition at line 329 of file TrackFitObject.h.
Referenced by copy(), getName(), printCov(), setName(), and ~TrackFitObject().

double TrackFitObject::resid[NPARMAX] [mutable, protected]

residuals

Definition at line 326 of file TrackFitObject.h.
Referenced by calculateChi2().

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

Generated on Fri Sep 14 17:38:38 2007 for Kinfit by

1.3.2

TrackFitObject Class Reference

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation