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genfit::WireMeasurementNew Class Reference

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

#include <GenFit/blob/master/measurements/include/WireMeasurementNew.h>

+ Inheritance diagram for genfit::WireMeasurementNew:
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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 override
 Deep copy ctor for polymorphic class.
 
virtual SharedPlanePtr constructPlane (const StateOnPlane &state) const override
 
virtual std::vector
< MeasurementOnPlane * > 		constructMeasurementsOnPlane (const StateOnPlane &state) const override
 
virtual const AbsHMatrix * constructHMatrix (const AbsTrackRep *) const override
 
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 override
 
- 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.
 
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)
 
double maxDistance_
 Wire end point 2 (X, Y, Z)
 
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.
 

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!
 

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 56 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 56 of file WireMeasurementNew.h

Constructor & Destructor Documentation

genfit::WireMeasurementNew::WireMeasurementNew ( )

Definition at line 39 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 39 of file WireMeasurementNew.cc

References wireEndPoint1_, and wireEndPoint2_.

Referenced by clone().

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

Definition at line 46 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 46 of file WireMeasurementNew.cc

References Acts::Test::cov, genfit::AbsMeasurement::setDetId(), genfit::AbsMeasurement::setHitId(), genfit::AbsMeasurement::setRawHitCoords(), genfit::AbsMeasurement::setRawHitCov(), genfit::AbsMeasurement::setTrackPoint(), and setWireEndPoints().

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virtual genfit::WireMeasurementNew::~WireMeasurementNew ( )
inlinevirtual

Definition at line 62 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 62 of file WireMeasurementNew.h

Member Function Documentation

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

Deep copy ctor for polymorphic class.

Implements genfit::AbsMeasurement.

Definition at line 64 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 64 of file WireMeasurementNew.h

References WireMeasurementNew().

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

Returns a new AbsHMatrix object. Caller must take ownership.

Implements genfit::AbsMeasurement.

Definition at line 132 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 132 of file WireMeasurementNew.cc

Referenced by constructMeasurementsOnPlane().

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std::vector< MeasurementOnPlane * > genfit::WireMeasurementNew::constructMeasurementsOnPlane ( const StateOnPlane &  state) const
overridevirtual

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.

Definition at line 98 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 98 of file WireMeasurementNew.cc

References constructHMatrix(), genfit::StateOnPlane::getPlane(), genfit::AbsMeasurement::getRawHitCoords(), genfit::AbsMeasurement::getRawHitCov(), genfit::StateOnPlane::getRep(), leftRight_, maxDistance_, and genfit::MeasurementOnPlane::setWeight().

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SharedPlanePtr genfit::WireMeasurementNew::constructPlane ( const StateOnPlane &  state) const
overridevirtual

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.

Definition at line 64 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 64 of file WireMeasurementNew.cc

References genfit::AbsTrackRep::extrapolateToLine(), genfit::AbsTrackRep::getMom(), genfit::AbsTrackRep::getPos(), genfit::StateOnPlane::getRep(), wireEndPoint1_, and wireEndPoint2_.

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int genfit::WireMeasurementNew::getLeftRightResolution ( ) const
inlineoverridevirtual

Reimplemented from genfit::AbsMeasurement.

Definition at line 101 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 101 of file WireMeasurementNew.h

References leftRight_.

double genfit::WireMeasurementNew::getMaxDistance ( )
inline

Definition at line 100 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 100 of file WireMeasurementNew.h

References maxDistance_.

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

Definition at line 99 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 99 of file WireMeasurementNew.h

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

select how to resolve the left/right ambiguity: -1: negative (left) side on vector (wire direction) x (track direction) 0: mirrors enter with same weight, DAF will decide. 1: positive (right) side on vector (wire direction) x (track direction) where the wire direction is pointing from endPoint1 to endPoint2

Definition at line 152 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 152 of file WireMeasurementNew.cc

References leftRight_.

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 89 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 89 of file WireMeasurementNew.h

References maxDistance_.

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

Reset the wire end points.

Definition at line 141 of file WireMeasurementNew.cc.

View newest version in sPHENIX GitHub at line 141 of file WireMeasurementNew.cc

References wireEndPoint1_, and wireEndPoint2_.

Referenced by WireMeasurementNew().

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Member Data Documentation

double genfit::WireMeasurementNew::leftRight_
protected

Definition at line 108 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 108 of file WireMeasurementNew.h

Referenced by constructMeasurementsOnPlane(), getLeftRightResolution(), and setLeftRightResolution().

double genfit::WireMeasurementNew::maxDistance_
protected

Wire end point 2 (X, Y, Z)

Definition at line 107 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 107 of file WireMeasurementNew.h

Referenced by constructMeasurementsOnPlane(), getMaxDistance(), and setMaxDistance().

double genfit::WireMeasurementNew::wireEndPoint1_[3]
protected

Definition at line 105 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 105 of file WireMeasurementNew.h

Referenced by constructPlane(), setWireEndPoints(), and WireMeasurementNew().

double genfit::WireMeasurementNew::wireEndPoint2_[3]
protected

Wire end point 1 (X, Y, Z)

Definition at line 106 of file WireMeasurementNew.h.

View newest version in sPHENIX GitHub at line 106 of file WireMeasurementNew.h

Referenced by constructPlane(), setWireEndPoints(), and WireMeasurementNew().

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