Inheritance diagram for THelixTrack_:

Public Member Functions
	THelixTrack_ (const double xyz, const double dir, double rho)

	THelixTrack_ (const THelixTrack_ &from)

	THelixTrack_ (const THelixTrack_ *from)

THelixTrack_ &	operator= (const THelixTrack_ &from)

void	Set (const double xyz, const double dir, double rho)

void	Set (double rho)

void	SetEmx (const double err2xy, const double err2z)

void	SetEmx (const double *err=0)

THEmx_t_ *	Emx () const

void	StiEmx (double emx[21]) const

void	GetSpot (const double axis[3][3], double emx[3]) const

void	Fill (TCircle_ &circ) const

void	Backward ()
	Change direction.

double	Move (double step)
	Move along helix.

double	Move (double step, double F[5][5])

double	Eval (double step, double xyz, double dir=0, double *rho=0) const
	Evaluate params with given step along helix.

double	Path (double stmax, const double surf, int nsurf, double x=0, double *dir=0, int nearest=0) const

double	Path (const double point[3], double xyz=0, double dir=0) const
	Distance to nearest point to given space point.

double	Dca (const double point[3], double *dcaErr=0) const
	DCA to given space point (with error matrix)

double	Path (double x, double y) const
	Distance to nearest point to given 2dim point.

double	Dca (double x, double y, double *dcaErr=0) const
	DCA to given 2dim point (with error matrix)

double	Path (const THelixTrack_ &hlx, double *s2=0) const

double	PathX (const THelixTrack_ &hlx, double s2=0, double dist=0, double *xyz=0) const

double	Dca (const double point[3], double &dcaXY, double &dcaZ, double dcaEmx[3], int kind=3) const
	distance and DCAxy and DCAz to given space point (with error matrix) More...

const double *	GetXYZ () const

const double *	Pos () const

double *	Pos ()

const double *	Dir () const

double *	Dir ()

double	GetRho () const

double	GetCos () const

double	GetSin () const

double	GetTan () const

double	GetPeriod () const

void	Rot (double angle)

void	Rot (double cosa, double sina)

void	Show (double len, const THelixTrack_ *other=0) const

void	Print (Option_t *opt="") const

Static Public Member Functions
static void	InvertMtx (double derivs[5][5])

static void	Test1 ()

static void	Test2 ()

static void	Test3 ()

static void	Test4 ()

static void	Test5 ()

static void	TestMtx ()

static void	TestDer ()

static void	TestErr ()

static void	TestTwoHlx ()

static void	TestBak ()

Protected Member Functions
void	MakeMtx (double step, double F[5][5])

double	Path (double stmin, double stmax, const double surf, int nsurf, double x=0, double *dir=0, int nearest=0) const

double	PathHZ (const double surf, int nsurf, double x=0, double *dir=0, int nearest=0) const

void	Build ()

Protected Attributes
char	fBeg [1]

double	fX [3]

double	fP [3]

double	fRho

double	fCosL

THEmx_t_ *	fEmx

char	fEnd [1]

Detailed Description

Definition at line 214 of file THelixTrack_.h.

Member Function Documentation

double THelixTrack_::Dca	(	const double	point[3],
		double &	dcaXY,
		double &	dcaZ,
		double	dcaEmx[3],
		int	kind = `3`
	)		const

distance and DCAxy and DCAz to given space point (with error matrix)

Full 3d dca evaluation point[3] - x,y,z of vertex dcaXY - dca in xy plane dcaZ - dca in Z direction dcaEmx[3] - err(dcaXY*dcaXY),err(dcaXY*dcaZ),err(dcaZ*dcaZ) kind - 3=3d dca,2=2d dca return distance to dca point

Definition at line 809 of file THelixTrack_.cxx.

References Move().

void THelixTrack_::GetSpot	(	const double	axis[3][3],
		double	emx[3]
	)		const

THelixTrack_::GetSpot(double axis[3][3],emx[3]) const axis[0,1] - vectors in plane. axis[2] - normal vector of plane emx[3] error matrix of coordinates according vectors in plane.

Definition at line 347 of file THelixTrack_.cxx.

References TCL::traat(), TCL::trasat(), TCL::trsa(), and TCL::trsinv().

Referenced by TCircleFitter_::FixAt().

void THelixTrack_::MakeMtx	(	double	step,
		double	F[5][5]
	)

protected

Make transformatiom matrix to transform errors called only after Eval()

Definition at line 388 of file THelixTrack_.cxx.

Referenced by Move().

double THelixTrack_::Path	(	double	stmax,
		const double *	surf,
		int	nsurf,
		double *	x = `0`,
		double *	dir = `0`,
		int	nearest = `0`
	)		const

Get current parameters Distance to crossing 2nd order surface surf[0]+surf[1]*x+surf[2]*y+surf[3]*z +surf[4]*x*x +surf[5]*y*y+surf[6]*z*z +surf[7]*x*y +surf[8]*y*z+surf[9]*z*x == 0 nearest==0 search alon direction, else the nearest

Definition at line 443 of file THelixTrack_.cxx.

Referenced by TCircleFitter_::FixAt(), THelix3d::Path(), and TestDer().

double THelixTrack_::Path	(	const THelixTrack_ &	hlx,
		double *	s2 = `0`
	)		const

Returns length to nearest point of other helix along this helix. *s2 the length along the other helix Both lengths are positive

Definition at line 597 of file THelixTrack_.cxx.

References Move().

double THelixTrack_::PathX	(	const THelixTrack_ &	hlx,
		double *	s2 = `0`,
		double *	dist = `0`,
		double *	xyz = `0`
	)		const

Extention of previous method. Both lengths could be -ve. *dist - distance between helicies xyz[6] - 1st and 2nd space points on the helicies

Definition at line 646 of file THelixTrack_.cxx.

References Backward(), and Eval().

void THelixTrack_::TestDer ( )

static

???

Definition at line 1446 of file THelixTrack_.cxx.

References Eval(), Move(), and Path().

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

StarRoot/THelixTrack_.h
StarRoot/THelixTrack_.cxx

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation