marlintpc::rb_Triplet Class Reference

Row based triplet. More...

#include <RowTripletBasedTrackFinderProcessor.h>

Public Member Functions
	rb_Triplet (rb_Doublet &, rb_Hit *)
	Construct row based triplet. More...
int	getRow () const
	Get row number (of center hit).
double	getX () const
	Get X coordinate.
double	getY () const
	Get Y coordinate.
double	getZ () const
	Get Z coordinate.
void	getPos (double *) const
	Get position. More...
double	getVarXYPos (const double=0.) const
	Get XY variance (position). More...
double	getVarXYDir () const
	Get XY variance (direction: phi).
double	getVarZPos (const double=0.) const
	Get Z variance (position). More...
double	getVarZDir () const
	Get Z variance (direction: tan(lambda)).
double	getPhiMeas () const
	Get XY measurement direction (average of outer hits).
double	getPhi () const
	Get direction in XY.
double	getTanl () const
	Get slope in ZS.
void	getPosCloseTo (const double, const double, double *, double &) const
	Get position close to reference point. More...
rb_Hit *	getHit (const int) const
	Get hit. More...
bool	match (rb_Triplet *, const double, const double) const
	Match triplet with other triplet. More...
double	getCosBeta () const
	Get cos(beta).

Detailed Description

Row based triplet.

Is build from matching hits in even or odd rows and has a position and a direction (determined from seeding doublet) in XY and ZS with corresponding covariances.

Constructor & Destructor Documentation

marlintpc::rb_Triplet::rb_Triplet	(	rb_Doublet &	doublet,
		rb_Hit *	hit
	)

Construct row based triplet.

Parameters

[in]	doublet	doublet of outer hits
[in]	hit	center hit

References marlintpc::rb_Doublet::getHit(), and marlintpc::rb_Doublet::getParameters().

Member Function Documentation

rb_Hit * marlintpc::rb_Triplet::getHit

(

const int

ihit

)

const

Get hit.

Parameters

[in]

ihit

hit index

Returns

hit

void marlintpc::rb_Triplet::getPos

(

double *

position

)

const

Get position.

Parameters

[out]

position

position

void marlintpc::rb_Triplet::getPosCloseTo	(	const double	xref,
		const double	yref,
		double *	position,
		double &	ds
	)		const

Get position close to reference point.

Parameters

[in]	xref	X of reference point
[in]	yref	Y of reference point
[out]	position	position
[out]	ds	arc length (to position)

Referenced by match().

double marlintpc::rb_Triplet::getVarXYPos

(

const double

ds = 0.

)

const

Get XY variance (position).

Parameters

[in]

ds

arc length

Referenced by match().

double marlintpc::rb_Triplet::getVarZPos

(

const double

ds = 0.

)

const

Get Z variance (position).

Parameters

[in]

ds

arc length

Referenced by match().

bool marlintpc::rb_Triplet::match	(	rb_Triplet *	trp,
		const double	posCut,
		const double	dirCut
	)		const

Match triplet with other triplet.

Match triplets in position and direction in XY and ZS.

Parameters

[in]	trp	triplet to compare with
[in]	posCut	cuts in normalized variance for position matching of (disjunct, overlapping) triplets
[in]	dirCut	cuts in normalized variance for direction matching of (disjunct, overlapping) triplets

Returns

matching flag

Chi2 values calculated from differences in position (at mid point) and direction and covariance matrices in XY and ZS are used as matching criteria (separately).

Matching cuts at ~4 sigma.

References getPhi(), getPhiMeas(), getPosCloseTo(), getRow(), getTanl(), getVarXYDir(), getVarXYPos(), getVarZDir(), getVarZPos(), getX(), and getY().

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

• RowTripletBasedTrackFinderProcessor.h
• RowTripletBasedTrackFinderProcessor.cc