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

#include <WireMeasurementNew.h>

Inheritance diagram for genfit::WireMeasurementNew:

Public Member Functions
	WireMeasurementNew ()

	WireMeasurementNew (double driftDistance, double driftDistanceError, const TVector3 &endPoint1, const TVector3 &endPoint2, int detId, int hitId, TrackPoint *trackPoint)

virtual	~WireMeasurementNew ()

virtual WireMeasurementNew *	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	setWireEndPoints (const TVector3 &endPoint1, const TVector3 &endPoint2)

void	setMaxDistance (double d)

void	setLeftRightResolution (int lr)

virtual bool	isLeftRigthMeasurement () const

double	getMaxDistance ()

int	getLeftRightResolution () const

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

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

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	wireEndPoint1_ [3]

double	wireEndPoint2_ [3]
	Wire end point 1 (X, Y, Z) More...

double	maxDistance_
	Wire end point 2 (X, Y, Z) More...

double	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: Tobias Schlüter

This is similar to WireMeasurement, but since WireMeasurement stores a 7x7 covariance matrix for what is a one-dimensional measurement, this class is preferable. Protected inheritance of rawHitCoords_ and rawHitCov_ makes it impossible to rewrite WireMeasurement, as subclasses will access these members.

This hit class is not valid for arbitrary choices of plane orientation: 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 55 of file WireMeasurementNew.h.

Constructor & Destructor Documentation

◆ WireMeasurementNew() [1/2]

genfit::WireMeasurementNew::WireMeasurementNew ( )

Referenced by clone().

◆ WireMeasurementNew() [2/2]

genfit::WireMeasurementNew::WireMeasurementNew	(	double	driftDistance,
		double	driftDistanceError,
		const TVector3 &	endPoint1,
		const TVector3 &	endPoint2,
		int	detId,
		int	hitId,
		TrackPoint *	trackPoint
	)

◆ ~WireMeasurementNew()

virtual genfit::WireMeasurementNew::~WireMeasurementNew ( )

inlinevirtual

Definition at line 61 of file WireMeasurementNew.h.

61 { ; }

Member Function Documentation

◆ clone()

virtual WireMeasurementNew* genfit::WireMeasurementNew::clone ( ) const

inlinevirtual

Deep copy ctor for polymorphic class.

Implements genfit::AbsMeasurement.

Definition at line 63 of file WireMeasurementNew.h.

References constructHMatrix(), constructMeasurementsOnPlane(), constructPlane(), setWireEndPoints(), and WireMeasurementNew().

63 { return new WireMeasurementNew(*this); }

genfit::WireMeasurementNew::WireMeasurementNew

WireMeasurementNew()

◆ constructHMatrix()

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

virtual

Returns a new AbsHMatrix object. Caller must take ownership.

Implements genfit::AbsMeasurement.

Referenced by clone().

◆ constructMeasurementsOnPlane()

virtual std::vector<MeasurementOnPlane *> genfit::WireMeasurementNew::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.

Referenced by clone().

◆ constructPlane()

virtual SharedPlanePtr genfit::WireMeasurementNew::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.

Referenced by clone().

◆ getLeftRightResolution()

int genfit::WireMeasurementNew::getLeftRightResolution ( ) const

inlinevirtual

Reimplemented from genfit::AbsMeasurement.

Definition at line 99 of file WireMeasurementNew.h.

References leftRight_.

99 { return leftRight_; }

genfit::WireMeasurementNew::leftRight_

double leftRight_

Definition: WireMeasurementNew.h:105

◆ getMaxDistance()

double genfit::WireMeasurementNew::getMaxDistance ( )

inline

Definition at line 98 of file WireMeasurementNew.h.

References maxDistance_.

98 { return maxDistance_; }

genfit::WireMeasurementNew::maxDistance_

double maxDistance_

Wire end point 2 (X, Y, Z)

Definition: WireMeasurementNew.h:104

◆ isLeftRigthMeasurement()

virtual bool genfit::WireMeasurementNew::isLeftRigthMeasurement ( ) const

inlinevirtual

Definition at line 97 of file WireMeasurementNew.h.

97 { return true; }

◆ setLeftRightResolution()

void genfit::WireMeasurementNew::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().

◆ setMaxDistance()

void genfit::WireMeasurementNew::setMaxDistance ( double d )

inline

Set maximum drift distance. This is used to calculate the start weights of the two measurementsOnPlane.

Definition at line 88 of file WireMeasurementNew.h.

References maxDistance_, and setLeftRightResolution().

88 { maxDistance_ = d; }

genfit::WireMeasurementNew::maxDistance_

double maxDistance_

Wire end point 2 (X, Y, Z)

Definition: WireMeasurementNew.h:104

◆ setWireEndPoints()

void genfit::WireMeasurementNew::setWireEndPoints	(	const TVector3 &	endPoint1,
		const TVector3 &	endPoint2
	)

Reset the wire end points.

Referenced by clone().

Member Data Documentation

◆ leftRight_

double genfit::WireMeasurementNew::leftRight_

protected

Definition at line 105 of file WireMeasurementNew.h.

Referenced by getLeftRightResolution().

◆ maxDistance_

double genfit::WireMeasurementNew::maxDistance_

protected

Wire end point 2 (X, Y, Z)

Definition at line 104 of file WireMeasurementNew.h.

Referenced by getMaxDistance(), and setMaxDistance().

◆ wireEndPoint1_

double genfit::WireMeasurementNew::wireEndPoint1_[3]

protected

Definition at line 102 of file WireMeasurementNew.h.

◆ wireEndPoint2_

double genfit::WireMeasurementNew::wireEndPoint2_[3]

protected

Wire end point 1 (X, Y, Z)

Definition at line 103 of file WireMeasurementNew.h.

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

WireMeasurementNew.h

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ WireMeasurementNew() [1/2]

◆ WireMeasurementNew() [2/2]

◆ ~WireMeasurementNew()

Member Function Documentation

◆ clone()

◆ constructHMatrix()

◆ constructMeasurementsOnPlane()

◆ constructPlane()

◆ getLeftRightResolution()

◆ getMaxDistance()

◆ isLeftRigthMeasurement()

◆ setLeftRightResolution()

◆ setMaxDistance()

◆ setWireEndPoints()

Member Data Documentation

◆ leftRight_

◆ maxDistance_

◆ wireEndPoint1_

◆ wireEndPoint2_