AliFmHelix Class Reference

#include <AliFmHelix.h>

Inherited by AliFmPhysicalHelix.

Inheritance diagram for AliFmHelix:

[legend]Collaboration diagram for AliFmHelix:

[legend]List of all members.

Public Member Functions
	AliFmHelix (double c, double dip, double phase, const AliFmThreeVector< double > &o, int h=-1)
	curvature, dip angle, phase, origin, h
virtual	~AliFmHelix ()
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 AliFmThreeVector< double > &	Origin () const
	-sign(q*B);
void	SetParameters (double c, double dip, double phase, const AliFmThreeVector< double > &o, int h)
	starting point
double	X (double s) const
double	Y (double s) const
double	Z (double s) const
AliFmThreeVector< double >	At (double s) const
double	Period () const
	returns period length of helix
pair< double, double >	PathLength (double r) const
	path length at given r (cylindrical r)
pair< double, double >	PathLength (double r, double x, double y, bool scanPeriods=true)
	path length at given r (cylindrical r, cylinder axis at x,y)
double	PathLength (const AliFmThreeVector< double > &p, bool scanPeriods=true) const
	path length at distance of closest approach to a given point
double	PathLength (const AliFmThreeVector< double > &r, const AliFmThreeVector< double > &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
pair< double, double >	PathLengths (const AliFmHelix &h, bool scanPeriods=true) const
	path lengths at dca between two helices
double	Distance (const AliFmThreeVector< double > &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
virtual void	MoveOrigin (double s)
	move the origin along the helix to s which becomes then s=0
Static Public Attributes
static const double	fgkNoSolution = 3.e+33
Protected Member Functions
	AliFmHelix ()
void	SetCurvature (double d)
void	SetPhase (double d)
	performs also various checks
void	SetDipAngle (double d)
double	FudgePathLength (const AliFmThreeVector< double > &v) const
	value of S where distance in x-y plane is minimal
Protected Attributes
bool	fSingularity
AliFmThreeVector< double >	fOrigin
double	fDipAngle
double	fCurvature
double	fPhase
int	fH
double	fCosDipAngle
double	fSinDipAngle
double	fCosPhase
double	fSinPhase

---

Constructor & Destructor Documentation

AliFmHelix::AliFmHelix	(	double	c,
		double	dip,
		double	phase,
		const AliFmThreeVector< double > &	o,
		int	h = -1
	)

curvature, dip angle, phase, origin, h

AliFmHelix::~AliFmHelix

(

)

[virtual]

AliFmHelix::AliFmHelix

(

)

[protected]

---

Member Function Documentation

double AliFmHelix::DipAngle

(

)

const [inline]

double AliFmHelix::Curvature

(

)

const [inline]

double AliFmHelix::Phase

(

)

const [inline]

1/R in xy-plane

double AliFmHelix::XCenter

(

)

const

aziumth in xy-plane measured from ring center

double AliFmHelix::YCenter

(

)

const

x-center of circle in xy-plane

int AliFmHelix::H

(

)

const [inline]

y-center of circle in xy-plane

const AliFmThreeVector< double > & AliFmHelix::Origin

(

)

const [inline]

-sign(q*B);

void AliFmHelix::SetParameters	(	double	c,
		double	dip,
		double	phase,
		const AliFmThreeVector< double > &	o,
		int	h
	)

starting point

double AliFmHelix::X

(

double

s

)

const [inline]

double AliFmHelix::Y

(

double

s

)

const [inline]

double AliFmHelix::Z

(

double

s

)

const [inline]

AliFmThreeVector< double > AliFmHelix::At

(

double

s

)

const [inline]

double AliFmHelix::Period

(

)

const

returns period length of helix

pair< double, double > AliFmHelix::PathLength

(

double

r

)

const

path length at given r (cylindrical r)

pair< double, double > AliFmHelix::PathLength	(	double	r,
		double	x,
		double	y,
		bool	scanPeriods = true
	)

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

double AliFmHelix::PathLength	(	const AliFmThreeVector< double > &	p,
		bool	scanPeriods = true
	)			const

path length at distance of closest approach to a given point

double AliFmHelix::PathLength	(	const AliFmThreeVector< double > &	r,
		const AliFmThreeVector< double > &	n
	)			const

path length at intersection with plane

double AliFmHelix::PathLength	(	double	x,
		double	y
	)			const [inline]

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

pair< double, double > AliFmHelix::PathLengths	(	const AliFmHelix &	h,
		bool	scanPeriods = true
	)			const

path lengths at dca between two helices

double AliFmHelix::Distance	(	const AliFmThreeVector< double > &	p,
		bool	scanPeriods = true
	)			const

minimal distance between point and helix

bool AliFmHelix::Valid

(

double

world = 1.e+5

)

const [inline]

checks for valid parametrization

int AliFmHelix::Bad

(

double

world = 1.e+5

)

const [inline]

void AliFmHelix::MoveOrigin

(

double

s

)

[virtual]

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

void AliFmHelix::SetCurvature

(

double

d

)

[protected]

void AliFmHelix::SetPhase

(

double

d

)

[protected]

performs also various checks

void AliFmHelix::SetDipAngle

(

double

d

)

[protected]

double AliFmHelix::FudgePathLength

(

const AliFmThreeVector< double > &

v

)

const [protected]

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

---

Member Data Documentation

const double AliFmHelix::fgkNoSolution = 3.e+33 [static]

bool AliFmHelix::fSingularity [protected]

AliFmThreeVector<double> AliFmHelix::fOrigin [protected]

double AliFmHelix::fDipAngle [protected]

double AliFmHelix::fCurvature [protected]

double AliFmHelix::fPhase [protected]

int AliFmHelix::fH [protected]

double AliFmHelix::fCosDipAngle [protected]

double AliFmHelix::fSinDipAngle [protected]

double AliFmHelix::fCosPhase [protected]

double AliFmHelix::fSinPhase [protected]

---

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

• /Users/lisa/alice/PWG2/FEMTOSCOPY/AliFemto/AliFmHelix.h
• /Users/lisa/alice/PWG2/FEMTOSCOPY/AliFemto/AliFmHelix.cxx

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