eicrecon::Helix Class Reference

#include <Helix.h>

Public Member Functions
	Helix (const double c, const double dip, const double phase, const edm4hep::Vector3f &o, const int h=-1)
	curvature, dip angle, phase, origin, h
	Helix (const edm4hep::Vector3f &p, const edm4hep::Vector3f &o, const double B, const int q)
	momentum, origin, b_field, charge
	Helix (const edm4eic::ReconstructedParticle &p, const double b_field)
	ReconstructParticle, b field.
	~Helix ()=default
double	dipAngle () const
double	curvature () const
double	phase () const
	1/R in xy-plane
double	xcenter () const
	aziumth in xy-plane measured from ring center
double	ycenter () const
	x-center of circle in xy-plane
int	h () const
	y-center of circle in xy-plane
const edm4hep::Vector3f &	origin () const
	-sign(q*B);
void	setParameters (double c, double dip, double phase, const edm4hep::Vector3f &o, int h)
	starting point
void	setParameters (const edm4hep::Vector3f &p, const edm4hep::Vector3f &o, const double B, const int q)
void	setParameters (const edm4eic::TrackParameters &trk, const double b_field)
	edm4eic::TrackParameters, b field
double	x (double s) const
	coordinates of helix at point s
double	y (double s) const
double	z (double s) const
edm4hep::Vector3f	at (double s) const
double	cx (double s) const
	pointing vector of helix at point s
double	cy (double s) const
double	cz (double s=0) const
edm4hep::Vector3f	cat (double s) const
double	period () const
	returns period length of helix
std::pair< double, double >	pathLength (double r) const
	path length at given r (cylindrical r)
std::pair< double, double >	pathLength (double r, double x, double y)
	path length at given r (cylindrical r, cylinder axis at x,y)
double	pathLength (const edm4hep::Vector3f &p, bool scanPeriods=true) const
	path length at distance of closest approach to a given point
double	pathLength (const edm4hep::Vector3f &r, const edm4hep::Vector3f &n) const
	path length at intersection with plane
double	pathLength (double x, double y) const
	path length at distance of closest approach in the xy-plane to a given point
std::pair< double, double >	pathLengths (const Helix &, double minStepSize=10 *edm4eic::unit::um, double minRange=10 *edm4eic::unit::cm) const
	path lengths at dca between two helices
double	distance (const edm4hep::Vector3f &p, bool scanPeriods=true) const
	minimal distance between point and helix
bool	valid (double world=1.e+5) const
	checks for valid parametrization
int	bad (double world=1.e+5) const
void	moveOrigin (double s)
	move the origin along the helix to s which becomes then s=0
void	setCurvature (double)
void	setPhase (double)
	performs also various checks
void	setDipAngle (double)
double	fudgePathLength (const edm4hep::Vector3f &) const
	value of S where distance in x-y plane is minimal
edm4hep::Vector3f	momentum (double) const
edm4hep::Vector3f	momentumAt (double, double) const
int	charge (double) const
double	curvatureSignedDistance (double x, double y)
double	geometricSignedDistance (double x, double y)
double	curvatureSignedDistance (const edm4hep::Vector3f &)
double	geometricSignedDistance (const edm4hep::Vector3f &)
void	Print () const

Static Public Attributes
static const double	NoSolution = 3.e+33

Constructor & Destructor Documentation

Helix() [1/3]

eicrecon::Helix::Helix	(	const double	c,
		const double	dip,
		const double	phase,
		const edm4hep::Vector3f &	o,
		const int	h = -1
	)

curvature, dip angle, phase, origin, h

Helix() [2/3]

eicrecon::Helix::Helix	(	const edm4hep::Vector3f &	p,
		const edm4hep::Vector3f &	o,
		const double	B,
		const int	q
	)

momentum, origin, b_field, charge

Helix() [3/3]

eicrecon::Helix::Helix	(	const edm4eic::ReconstructedParticle &	p,
		const double	b_field
	)

ReconstructParticle, b field.

~Helix()

eicrecon::Helix::~Helix ( )

default

Member Function Documentation

at()

edm4hep::Vector3f eicrecon::Helix::at ( double  s ) const

inline

bad()

int eicrecon::Helix::bad ( double  world = 1.e+5 ) const

inline

cat()

edm4hep::Vector3f eicrecon::Helix::cat ( double  s ) const

inline

charge()

int eicrecon::Helix::charge

(

double

B

)

const

curvature()

double eicrecon::Helix::curvature ( ) const

inline

curvatureSignedDistance() [1/2]

double eicrecon::Helix::curvatureSignedDistance

(

const edm4hep::Vector3f &

pos

)

curvatureSignedDistance() [2/2]

double eicrecon::Helix::curvatureSignedDistance	(	double	x,
		double	y
	)

cx()

double eicrecon::Helix::cx ( double  s ) const

inline

pointing vector of helix at point s

cy()

double eicrecon::Helix::cy ( double  s ) const

inline

cz()

double eicrecon::Helix::cz ( double  s = 0 ) const

inline

dipAngle()

double eicrecon::Helix::dipAngle ( ) const

inline

distance()

double eicrecon::Helix::distance	(	const edm4hep::Vector3f &	p,
		bool	scanPeriods = true
	)		const

minimal distance between point and helix

fudgePathLength()

double eicrecon::Helix::fudgePathLength

(

const edm4hep::Vector3f &

p

)

const

value of S where distance in x-y plane is minimal

geometricSignedDistance() [1/2]

double eicrecon::Helix::geometricSignedDistance

(

const edm4hep::Vector3f &

pos

)

geometricSignedDistance() [2/2]

double eicrecon::Helix::geometricSignedDistance	(	double	x,
		double	y
	)

h()

int eicrecon::Helix::h ( ) const

inline

y-center of circle in xy-plane

momentum()

edm4hep::Vector3f eicrecon::Helix::momentum

(

double

B

)

const

momentumAt()

edm4hep::Vector3f eicrecon::Helix::momentumAt	(	double	S,
		double	B
	)		const

moveOrigin()

void eicrecon::Helix::moveOrigin

(

double

s

)

move the origin along the helix to s which becomes then s=0

origin()

const edm4hep::Vector3f & eicrecon::Helix::origin ( ) const

inline

-sign(q*B);

pathLength() [1/5]

double eicrecon::Helix::pathLength	(	const edm4hep::Vector3f &	p,
		bool	scanPeriods = true
	)		const

path length at distance of closest approach to a given point

pathLength() [2/5]

double eicrecon::Helix::pathLength	(	const edm4hep::Vector3f &	r,
		const edm4hep::Vector3f &	n
	)		const

path length at intersection with plane

pathLength() [3/5]

std::pair< double, double > eicrecon::Helix::pathLength

(

double

r

)

const

path length at given r (cylindrical r)

pathLength() [4/5]

std::pair< double, double > eicrecon::Helix::pathLength	(	double	r,
		double	x,
		double	y
	)

path length at given r (cylindrical r, cylinder axis at x,y)

pathLength() [5/5]

double eicrecon::Helix::pathLength ( double  x, double  y  ) const

inline

path length at distance of closest approach in the xy-plane to a given point

pathLengths()

std::pair< double, double > eicrecon::Helix::pathLengths	(	const Helix &	h,
		double	minStepSize = 10 * edm4eic::unit::um,
		double	minRange = 10 * edm4eic::unit::cm
	)		const

path lengths at dca between two helices

period()

double eicrecon::Helix::period

(

)

const

returns period length of helix

phase()

double eicrecon::Helix::phase ( ) const

inline

1/R in xy-plane

Print()

void eicrecon::Helix::Print

(

)

const

setCurvature()

void eicrecon::Helix::setCurvature

(

double

val

)

setDipAngle()

void eicrecon::Helix::setDipAngle

(

double

val

)

setParameters() [1/3]

void eicrecon::Helix::setParameters	(	const edm4eic::TrackParameters &	trk,
		const double	b_field
	)

edm4eic::TrackParameters, b field

setParameters() [2/3]

void eicrecon::Helix::setParameters	(	const edm4hep::Vector3f &	p,
		const edm4hep::Vector3f &	o,
		const double	B,
		const int	q
	)

setParameters() [3/3]

void eicrecon::Helix::setParameters	(	double	c,
		double	dip,
		double	phase,
		const edm4hep::Vector3f &	o,
		int	h
	)

starting point

setPhase()

void eicrecon::Helix::setPhase

(

double

val

)

performs also various checks

valid()

bool eicrecon::Helix::valid ( double  world = 1.e+5 ) const

inline

checks for valid parametrization

x()

double eicrecon::Helix::x ( double  s ) const

inline

coordinates of helix at point s

xcenter()

double eicrecon::Helix::xcenter

(

)

const

aziumth in xy-plane measured from ring center

y()

double eicrecon::Helix::y ( double  s ) const

inline

ycenter()

double eicrecon::Helix::ycenter

(

)

const

x-center of circle in xy-plane

z()

double eicrecon::Helix::z ( double  s ) const

inline

Member Data Documentation

NoSolution

const double eicrecon::Helix::NoSolution = 3.e+33

static

---

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

• src/algorithms/reco/Helix.h
• src/algorithms/reco/Helix.cc