Class for measurements in wire detectors (Straw tubes and drift chambers) which do not measure the coordinate along the wire. More...

#include <WireMeasurement.h>

Inheritance diagram for genfit::WireMeasurement:

Public Member Functions
	WireMeasurement (int nDim=7)

	WireMeasurement (const TVectorD &rawHitCoords, const TMatrixDSym &rawHitCov, int detId, int hitId, TrackPoint *trackPoint)

virtual	~WireMeasurement ()

virtual AbsMeasurement *	clone () const
	Deep copy ctor for polymorphic class. More...

virtual SharedPlanePtr	constructPlane (const StateOnPlane &state) const

virtual std::vector< MeasurementOnPlane * >	constructMeasurementsOnPlane (const StateOnPlane &state) const

virtual const AbsHMatrix *	constructHMatrix (const AbsTrackRep *) const

void	setMaxDistance (double d)

void	setLeftRightResolution (int lr)

virtual bool	isLeftRightMeasurement () const
	If the AbsMeasurement is a wire hit, the left/right resolution will be used. More...

virtual int	getLeftRightResolution () const

double	getMaxDistance ()

Public Member Functions inherited from genfit::AbsMeasurement
	AbsMeasurement ()

	AbsMeasurement (int nDims)

	AbsMeasurement (const TVectorD &rawHitCoords, const TMatrixDSym &rawHitCov, int detId, int hitId, TrackPoint *trackPoint)

virtual	~AbsMeasurement ()

TrackPoint *	getTrackPoint () const

void	setTrackPoint (TrackPoint *tp)

const TVectorD &	getRawHitCoords () const

const TMatrixDSym &	getRawHitCov () const

TVectorD &	getRawHitCoords ()

TMatrixDSym &	getRawHitCov ()

int	getDetId () const

int	getHitId () const

unsigned int	getDim () const

void	setRawHitCoords (const TVectorD &coords)

void	setRawHitCov (const TMatrixDSym &cov)

void	setDetId (int detId)

void	setHitId (int hitId)

virtual void	Print (const Option_t *="") const

Protected Attributes
double	maxDistance_

signed char	leftRight_

Protected Attributes inherited from genfit::AbsMeasurement
TVectorD	rawHitCoords_

TMatrixDSym	rawHitCov_

int	detId_

int	hitId_

TrackPoint *	trackPoint_
	Pointer to TrackPoint where the measurement belongs to. More...

Additional Inherited Members
Protected Member Functions inherited from genfit::AbsMeasurement
	AbsMeasurement (const AbsMeasurement &)
	protect from calling copy c'tor from outside the class. Use clone() if you want a copy! More...

Detailed Description

Class for measurements in wire detectors (Straw tubes and drift chambers) which do not measure the coordinate along the wire.

Author: Christian Höppner (Technische Universität München, original author); Lia Lavezzi (INFN Pavia, original author); Sebastian Neubert (Technische Universität München, original author); Johannes Rauch (Technische Universität München, original author)

This hit class is not valid for any kind of plane orientation choice: to use it you MUST choose a plane described by u and v axes with v coincident with the wire (and u orthogonal to it, obviously). The hit will be described by 7 coordinates: w_x1, w_y1, w_z1, w_x2, w_y2, w_z2, rdrift where w_ji (with j = x, y, z and i = 1, 2) are the wire extremities coordinates; rdrift = distance from the wire (u coordinate in the plane)

Definition at line 51 of file WireMeasurement.h.

Constructor & Destructor Documentation

◆ WireMeasurement() [1/2]

genfit::WireMeasurement::WireMeasurement ( int nDim = 7 )

Referenced by clone().

◆ WireMeasurement() [2/2]

genfit::WireMeasurement::WireMeasurement	(	const TVectorD &	rawHitCoords,
		const TMatrixDSym &	rawHitCov,
		int	detId,
		int	hitId,
		TrackPoint *	trackPoint
	)

◆ ~WireMeasurement()

virtual genfit::WireMeasurement::~WireMeasurement ( )

inlinevirtual

Definition at line 57 of file WireMeasurement.h.

57 { ; }

Member Function Documentation

◆ clone()

virtual AbsMeasurement* genfit::WireMeasurement::clone ( ) const

inlinevirtual

Deep copy ctor for polymorphic class.

Implements genfit::AbsMeasurement.

Reimplemented in genfit::WirePointMeasurement.

Definition at line 59 of file WireMeasurement.h.

References constructHMatrix(), constructMeasurementsOnPlane(), constructPlane(), and WireMeasurement().

59 { return new WireMeasurement(*this); }

genfit::WireMeasurement::WireMeasurement

WireMeasurement(int nDim=7)

◆ constructHMatrix()

virtual const AbsHMatrix* genfit::WireMeasurement::constructHMatrix ( const AbsTrackRep * ) const

virtual

Returns a new AbsHMatrix object. Caller must take ownership.

Implements genfit::AbsMeasurement.

Reimplemented in genfit::WirePointMeasurement.

Referenced by clone().

◆ constructMeasurementsOnPlane()

virtual std::vector<MeasurementOnPlane *> genfit::WireMeasurement::constructMeasurementsOnPlane ( const StateOnPlane & state ) const

virtual

Hits with a small drift distance get a higher weight, whereas hits with big drift distances become weighted down. When these initial weights are used by the DAF, the smoothed track will be closer to the real trajectory than if both sides are weighted with 0.5 regardless of the drift distance. This helps a lot when resolving l/r ambiguities with the DAF. The idea is that for the first iteration of the DAF, the wire positions are taken. For small drift radii, the wire position does not bend the fit away from the trajectory, whereas the wire position for hits with large drift radii is further away from the trajectory and will therefore bias the fit if not weighted down.

Implements genfit::AbsMeasurement.

Reimplemented in genfit::WirePointMeasurement.

Referenced by clone().

◆ constructPlane()

virtual SharedPlanePtr genfit::WireMeasurement::constructPlane ( const StateOnPlane & state ) const

virtual

Construct (virtual) detector plane (use state's AbsTrackRep). It's possible to make corrections to the plane here. The state should be defined somewhere near the measurement. For virtual planes, the state will be extrapolated to the POCA to point (SpacepointMeasurement) or line (WireMeasurement), and from this info the plane will be constructed.

Implements genfit::AbsMeasurement.

Reimplemented in genfit::WirePointMeasurement.

Referenced by clone().

◆ getLeftRightResolution()

virtual int genfit::WireMeasurement::getLeftRightResolution ( ) const

inlinevirtual

Reimplemented from genfit::AbsMeasurement.

Definition at line 90 of file WireMeasurement.h.

References leftRight_.

90 { return leftRight_; }

genfit::WireMeasurement::leftRight_

signed char leftRight_

Definition: WireMeasurement.h:96

◆ getMaxDistance()

double genfit::WireMeasurement::getMaxDistance ( )

inline

Definition at line 92 of file WireMeasurement.h.

References maxDistance_.

92 { return maxDistance_; }

genfit::WireMeasurement::maxDistance_

double maxDistance_

Definition: WireMeasurement.h:95

◆ isLeftRightMeasurement()

virtual bool genfit::WireMeasurement::isLeftRightMeasurement ( ) const

inlinevirtual

If the AbsMeasurement is a wire hit, the left/right resolution will be used.

Reimplemented from genfit::AbsMeasurement.

Definition at line 89 of file WireMeasurement.h.

89 { return true; }

◆ setLeftRightResolution()

void genfit::WireMeasurement::setLeftRightResolution ( int lr )

select how to resolve the left/right ambiguity: -1: negative (left) side on vector (track direction) x (wire direction) 0: auto select (take side with smallest distance to track) 1: positive (right) side on vector (track direction) x (wire direction)

Referenced by setMaxDistance().