CDCRecoHit3D Class Reference

Class representing a three dimensional reconstructed hit. More...

#include <CDCRecoHit3D.h>

Public Member Functions
	CDCRecoHit3D ()=default
	Default constructor for ROOT.
	CDCRecoHit3D (const CDCRLWireHit &rlWireHit, const ROOT::Math::XYZVector &recoPos3D, double arcLength2D=0)
	Constructor taking all stored variables of the reconstructed hit.
void	reverse ()
	Turns the orientation in place.
CDCRecoHit3D	reversed () const
	Returns the recohit with the opposite right left information.
	operator const Belle2::CDCHit * () const
	Make the wire hit automatically castable to its underlying cdcHit.
bool	operator== (const CDCRecoHit3D &other) const
	Equality comparison based on wire hit, right left passage information and reconstructed position.
bool	operator< (const CDCRecoHit3D &other) const
	Total ordering relation based on wire hit, right left passage information and position information in this order of importance.
CDC::EStereoKind	getStereoKind () const
	Getter for the stereo type of the underlying wire.
bool	isAxial () const
	Indicator if the underlying wire is axial.
CDC::ISuperLayer	getISuperLayer () const
	Getter for the superlayer id.
const CDC::CDCWire &	getWire () const
	Getter for the wire.
bool	isOnWire (const CDC::CDCWire &wire) const
	Checks if the reconstructed hit is associated with the give wire.
const CDCWireHit &	getWireHit () const
	Getter for the wire hit.
bool	hasWireHit (const CDCWireHit &wireHit) const
	Checks if the reconstructed hit is associated with the give wire hit.
const CDCRLWireHit &	getRLWireHit () const
	Getter for the oriented wire hit.
void	setRLWireHit (const CDCRLWireHit &rlWireHit)
	Setter for the oriented wire hit associated with the reconstructed hit.
ERightLeft	getRLInfo () const
	Getter for the right left passage information.
void	setRLInfo (ERightLeft rlInfo)
	Setter the right left passage information.
const ROOT::Math::XYVector &	getRefPos2D () const
	Getter for the reference position of the wire.
const ROOT::Math::XYZVector &	getRecoPos3D () const
	Getter for the 3d position of the hit.
void	setRecoPos3D (const ROOT::Math::XYZVector &recoPos3D)
	Setter for the 3d position of the hit.
const ROOT::Math::XYVector	getRecoPos2D () const
	Getter for the 2d position of the hit.
double	getRecoZ () const
	Getter for the z coordinate of the reconstructed position.
ROOT::Math::XYVector	getRecoDisp2D () const
	Gets the displacement from the wire position in the xy plain at the reconstructed position.
ROOT::Math::XYVector	getFlightDirection2D () const
	Getter for the direction of flight.
double	getAlpha () const
	Getter for the direction of flight relative to the position.
CDCRecoHit2D	getRecoHit2D () const
	Constructs a two dimensional reconstructed hit by carrying out the stereo !
CDCRecoHit2D	stereoProjectToRef () const
	Constructs a two dimensional reconstructed hit by carrying out the stereo !
ROOT::Math::XYVector	getRecoWirePos2D () const
	Returns the position of the wire in the xy plain the reconstructed position is located in.
void	snapToDriftCircle (bool switchSide=false)
	Scales the displacement vector in place to lie on the drift circle.
double	getSignedRecoDriftLength () const
	Returns the drift length next to the reconstructed position.
void	setRecoDriftLength (double driftLength, bool snapRecoPos)
	Setter to update the drift length of the hit.
double	getRecoDriftLengthVariance () const
	Returns the drift length variance next to the reconstructed position.
void	shiftArcLength2D (double arcLength2DOffSet)
	Adjust the travel distance by the given value.
double	getArcLength2D () const
	Getter for the travel distance in the xy projection.
void	setArcLength2D (const double arcLength2D)
	Setter for the travel distance in the xy projection.
bool	isInCellZBounds (const double factor=1) const
	Indicator if the hit is in the cdc (scaled by the factor) or already outside its boundaries.

Static Public Member Functions
static CDCRecoHit3D	fromSimHit (const CDCWireHit *wireHit, const CDCSimHit &simHit)
	Constructs a three dimensional reconstructed hit from a sim hit and the associated wirehit.
static CDCRecoHit3D	reconstruct (const CDCRecoHit2D &recoHit2D, const CDCTrajectory2D &trajectory2D)
	Reconstructs the three dimensional hit from the two dimensional and the two dimensional trajectory.
static CDCRecoHit3D	reconstruct (const CDCRLWireHit &rlWireHit, const CDCTrajectory2D &trajectory2D)
	Reconstructs the three dimensional hit from the wire hit and the given right left passage information by shifting it to a z coordinate, where it touches the two dimensional trajectory from the side indicated by the right left passage.
static CDCRecoHit3D	reconstruct (const CDCWireHit *wireHit, ERightLeft rlInfo, const CDCTrajectory2D &trajectory2D)
	Reconstructs the three dimensional hit from the wire hit and the given right left passage information by shifting it to a z coordinate, where it touches the two dimensional trajectory from the side indicated by the right left passage.
static CDCRecoHit3D	reconstructNearest (const CDCWireHit *axialWireHit, const CDCTrajectory2D &trajectory2D)
	Reconstruct a three dimensional hit from a wire hit (as in reconstruct(rlWireHit, trajectory2D)), but this time use a wire hit without a right-left information as an input.
static CDCRecoHit3D	reconstruct (const CDCRecoHit2D &recoHit, const CDCTrajectory3D &trajectory3D)
	Convenience function to call the other reconstruct method with the sz- and 2d-trajectory contained in the 3d one.
static CDCRecoHit3D	reconstruct (const CDCRecoHit2D &recoHit2D, const CDCTrajectory2D &trajectory2D, const CDCTrajectorySZ &trajectorySZ)
	Deprecated - try to use the method above for the same purpose.
static CDCRecoHit3D	average (const CDCRecoHit3D &first, const CDCRecoHit3D &second)
	Constructs the average of two reconstructed hit positions.

Private Attributes
CDCRLWireHit	m_rlWireHit
	Memory for the oriented wire hit reference.
ROOT::Math::XYZVector	m_recoPos3D
	Memory for the reconstructed hit position.
double	m_arcLength2D = 0
	Memory for the travel distance as see in the xy projection.

Friends
bool	operator< (const CDCRecoHit3D &recoHit3D, const CDC::CDCWire &wire)
	Defines wires and the three dimensional reconstructed hits as coaligned.
bool	operator< (const CDC::CDCWire &wire, const CDCRecoHit3D &recoHit3D)
	Defines wires and the three dimensional reconstructed hits as coaligned.
bool	operator< (const CDCRecoHit3D &recoHit3D, const CDCWireHit &wireHit)
	Defines wire hits and the three dimensional reconstructed hits as coaligned.
bool	operator< (const CDCWireHit &wireHit, const CDCRecoHit3D &recoHit3D)
	Defines wire hits and the three dimensional reconstructed hits as coaligned.

Detailed Description

Class representing a three dimensional reconstructed hit.

A recohit represents a likely point where the particle went through. It is always associated with a wire hit it seeks to reconstruct. The reconstructed point is stored as an absolute position from the origin / interaction point. In addition the reconstructed hit takes a right left passage information which indicates if the hit wire lies to the right or to the left of the particle trajectory causing the hit. The later readily indicates a flight direction from the reconstructed hit, if a tangential approach of the trajectory to the drift circle is assumed.

Finally we want to estimate the travel distance to z coordinate relation of the particle trajectory. Therefore the three dimensional reconstructed hit stores the travel distance as seen from the xy projection ( arcLength2D ) it took to get to hit. This variable can be calculated from the trajectory circle fitted in the two dimensional tracking as the arc length.

Definition at line 59 of file CDCRecoHit3D.h.

Constructor & Destructor Documentation

CDCRecoHit3D()

CDCRecoHit3D	(	const CDCRLWireHit &	rlWireHit,
		const ROOT::Math::XYZVector &	recoPos3D,
		double	arcLength2D = 0 )

Constructor taking all stored variables of the reconstructed hit.

Definition at line 37 of file CDCRecoHit3D.cc.

  : m_rlWireHit(rlWireHit)
  , m_recoPos3D(recoPos3D)
  , m_arcLength2D(arcLength2D)
{
}

Member Function Documentation

average()

CDCRecoHit3D average ( const CDCRecoHit3D & first, const CDCRecoHit3D & second )

static

Constructs the average of two reconstructed hit positions.

Averages the hit positions and the travel distance. The function averages only reconstructed hits associated with the same wire hit. If not all reconstructed hits are on the same wire hit, the first hit is returned unchanged. Also averages the right left passage information with averageInfo().

Definition at line 139 of file CDCRecoHit3D.cc.

{
  if (first.getRLWireHit() == second.getRLWireHit()) {
    return CDCRecoHit3D(first.getRLWireHit(),
                        VectorUtil::average(first.getRecoPos3D(), second.getRecoPos3D()),
                        (first.getArcLength2D() + second.getArcLength2D()) / 2);
  } else {
    B2ERROR("Averaging three dimensional hits which are on different oriented wire hits. Return "
            "first one unchanged");
    return first;
  }
}

fromSimHit()

CDCRecoHit3D fromSimHit ( const CDCWireHit * wireHit, const CDCSimHit & simHit )

static

Constructs a three dimensional reconstructed hit from a sim hit and the associated wirehit.

This translates the sim hit to a reconstructed hit mainly to be able to compare the reconstructed values from the algorithm with the Monte Carlo information. It merely takes the position from the sim hit and calculates the right left passage information. Since only the time is present in the sim hit but not the travel distance this parameter is just set NAN!

Definition at line 46 of file CDCRecoHit3D.cc.

{
  // arc length cannot be deduced from the flightTime in this context
  double arcLength2D = std::numeric_limits<double>::quiet_NaN();
 
  return CDCRecoHit3D(CDCRLWireHit::fromSimHit(wireHit, simHit),
                      ROOT::Math::XYZVector{simHit.getPosTrack()},
                      arcLength2D);
}

getAlpha()

double getAlpha ( ) const

inline

Getter for the direction of flight relative to the position.

Definition at line 328 of file CDCRecoHit3D.h.

      {
        return ROOT::Math::VectorUtil::DeltaPhi(getRecoPos2D(), getFlightDirection2D());
      }

getArcLength2D()

double getArcLength2D ( ) const

inline

Getter for the travel distance in the xy projection.

Definition at line 379 of file CDCRecoHit3D.h.

      {
        return m_arcLength2D;
      }

getFlightDirection2D()

ROOT::Math::XYVector getFlightDirection2D ( ) const

inline

Getter for the direction of flight.

Definition at line 321 of file CDCRecoHit3D.h.

      {
        ERotation rotation = static_cast<ERotation>(-getRLInfo());
        return VectorUtil::Orthogonal(getRecoDisp2D(), rotation);
      }

getISuperLayer()

CDC::ISuperLayer getISuperLayer ( ) const

inline

Getter for the superlayer id.

Definition at line 227 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getISuperLayer();
      }

getRecoDisp2D()

ROOT::Math::XYVector getRecoDisp2D

(

)

const

Gets the displacement from the wire position in the xy plain at the reconstructed position.

Definition at line 152 of file CDCRecoHit3D.cc.

{
  const CDCWire& wire = getWire();
  const double recoPosZ = getRecoPos3D().z();
 
  ROOT::Math::XYVector wirePos = wire.getWirePos2DAtZ(recoPosZ);
  ROOT::Math::XYVector disp2D = VectorUtil::getXYVector(getRecoPos3D()) - wirePos;
  return disp2D;
}

getRecoDriftLengthVariance()

double getRecoDriftLengthVariance ( ) const

inline

Returns the drift length variance next to the reconstructed position.

Dummy implemented as the reference drift length.

Definition at line 367 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getRefDriftLengthVariance();
      }

getRecoHit2D()

CDCRecoHit2D getRecoHit2D

(

)

const

Constructs a two dimensional reconstructed hit by carrying out the stereo !

projection to the wire reference position.

Definition at line 200 of file CDCRecoHit3D.cc.

{
  return CDCRecoHit2D(m_rlWireHit, getRecoDisp2D());
}

getRecoPos2D()

const ROOT::Math::XYVector getRecoPos2D ( ) const

inline

Getter for the 2d position of the hit.

This used to return a reference, but that's not possible when creating the vector on the fly after moving to ROOT::Math::Vector(2/3)D

Definition at line 306 of file CDCRecoHit3D.h.

      {
        return VectorUtil::getXYVector(getRecoPos3D());
      }

getRecoPos3D()

const ROOT::Math::XYZVector & getRecoPos3D ( ) const

inline

Getter for the 3d position of the hit.

Definition at line 292 of file CDCRecoHit3D.h.

      {
        return m_recoPos3D;
      }

getRecoWirePos2D()

ROOT::Math::XYVector getRecoWirePos2D

(

)

const

Returns the position of the wire in the xy plain the reconstructed position is located in.

Definition at line 210 of file CDCRecoHit3D.cc.

{
  return getWire().getWirePos2DAtZ(getRecoZ());
}

getRecoZ()

double getRecoZ ( ) const

inline

Getter for the z coordinate of the reconstructed position.

Definition at line 312 of file CDCRecoHit3D.h.

      {
        return getRecoPos3D().z();
      }

getRefPos2D()

const ROOT::Math::XYVector & getRefPos2D ( ) const

inline

Getter for the reference position of the wire.

Definition at line 286 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getRefPos2D();
      }

getRLInfo()

ERightLeft getRLInfo ( ) const

inline

Getter for the right left passage information.

Returns the right left passage information as see in the xy projection. It gives if the wire lies on the right or on the left side of the track
as you at the xy projection.

Definition at line 274 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getRLInfo();
      }

getRLWireHit()

const CDCRLWireHit & getRLWireHit ( ) const

inline

Getter for the oriented wire hit.

Definition at line 257 of file CDCRecoHit3D.h.

      {
        return m_rlWireHit;
      }

getSignedRecoDriftLength()

double getSignedRecoDriftLength ( ) const

inline

Returns the drift length next to the reconstructed position.

Dummy implemented as the reference drift length.

Definition at line 355 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getSignedRefDriftLength();
      }

getStereoKind()

CDC::EStereoKind getStereoKind ( ) const

inline

Getter for the stereo type of the underlying wire.

Definition at line 215 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getStereoKind();
      }

getWire()

const CDC::CDCWire & getWire ( ) const

inline

Getter for the wire.

Definition at line 233 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getWire();
      }

getWireHit()

const CDCWireHit & getWireHit ( ) const

inline

Getter for the wire hit.

Definition at line 245 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().getWireHit();
      }

hasWireHit()

bool hasWireHit ( const CDCWireHit & wireHit ) const

inline

Checks if the reconstructed hit is associated with the give wire hit.

Definition at line 251 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().hasWireHit(wireHit);
      }

isAxial()

bool isAxial ( ) const

inline

Indicator if the underlying wire is axial.

Definition at line 221 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().isAxial();
      }

isInCellZBounds()

bool isInCellZBounds

(

const double

factor = 1

)

const

Indicator if the hit is in the cdc (scaled by the factor) or already outside its boundaries.

Checks for z to be in the range of the wire.

Definition at line 215 of file CDCRecoHit3D.cc.

{
  return getWire().isInCellZBounds(getRecoPos3D(), factor);
}

isOnWire()

bool isOnWire ( const CDC::CDCWire & wire ) const

inline

Checks if the reconstructed hit is associated with the give wire.

Definition at line 239 of file CDCRecoHit3D.h.

      {
        return getRLWireHit().isOnWire(wire);
      }

operator const Belle2::CDCHit *()

operator const Belle2::CDCHit * ( ) const

inline

Make the wire hit automatically castable to its underlying cdcHit.

Definition at line 166 of file CDCRecoHit3D.h.

      {
        return static_cast<const CDCHit*>(getRLWireHit());
      }

operator<()

bool operator< ( const CDCRecoHit3D & other ) const

inline

Total ordering relation based on wire hit, right left passage information and position information in this order of importance.

Definition at line 183 of file CDCRecoHit3D.h.

      {
        return (getRLWireHit() < other.getRLWireHit() or
                (getRLWireHit() == other.getRLWireHit() and
                 VectorUtil::smaller(getRecoPos3D(), other.getRecoPos3D())));
      }

operator==()

bool operator== ( const CDCRecoHit3D & other ) const

inline

Equality comparison based on wire hit, right left passage information and reconstructed position.

Definition at line 172 of file CDCRecoHit3D.h.

      {
        return getRLWireHit() == other.getRLWireHit() and
               getRLInfo() == other.getRLInfo() and
               getRecoPos3D() == other.getRecoPos3D();
      }

reconstruct() [1/5]

CDCRecoHit3D reconstruct ( const CDCRecoHit2D & recoHit, const CDCTrajectory3D & trajectory3D )

static

Convenience function to call the other reconstruct method with the sz- and 2d-trajectory contained in the 3d one.

Definition at line 82 of file CDCRecoHit3D.cc.

{
  // This this is quite legacy behaviour - do something smarter.
  CDCTrajectory2D trajectory2D = trajectory3D.getTrajectory2D();
  CDCTrajectorySZ trajectorySZ = trajectory3D.getTrajectorySZ();
 
  return reconstruct(recoHit, trajectory2D, trajectorySZ);
}

reconstruct() [2/5]

CDCRecoHit3D reconstruct ( const CDCRecoHit2D & recoHit2D, const CDCTrajectory2D & trajectory2D )

static

Reconstructs the three dimensional hit from the two dimensional and the two dimensional trajectory.

For two dimensional reconstructed hits on axial wires this reconstructs the xy position and the transverse travel distance. The z coordinate cannot be determined since the projection can not show any information about it. It is always set to NAN for axial hits.

For two dimensional reconstructed hits on stereo wires however the deviation of the xy position can be used to get z information. The reconstructed hit lies exactly on the fitted trajectory as seen from the xy plane. Hence also xy position and transverse travel distance are available. Only the stereo hits have then the full information to go head and make the sz trajectory.

Definition at line 56 of file CDCRecoHit3D.cc.

{
  ROOT::Math::XYZVector recoPos3D = recoHit2D.reconstruct3D(trajectory2D);
  double arcLength2D = trajectory2D.calcArcLength2D(VectorUtil::getXYVector(recoPos3D));
  return CDCRecoHit3D(recoHit2D.getRLWireHit(), recoPos3D, arcLength2D);
}

reconstruct() [3/5]

CDCRecoHit3D reconstruct ( const CDCRecoHit2D & recoHit2D, const CDCTrajectory2D & trajectory2D, const CDCTrajectorySZ & trajectorySZ )

static

Deprecated - try to use the method above for the same purpose.

Reconstructs the three dimensional hit from the two dimensional, the two dimensional trajectory and sz trajectory. For two dimensional reconstructed hits on axial wires this reconstructs

the xy position and the transverse travel distance. The z coordinate is then determined by evaluating the sz trajectory at the just calculated travel distance. Note that it is important that both circle trajectory and sz trajectory share a common reference point.

For two dimensional reconstructed hits on stereo wires the transverse travel distance is obtained as in the reconstruct() method before. However the z coordinate is set to the value of the sz trajectory at just calculated the transverse travel distance, since the trajectory should be more exact than the shifting along the wire.

Definition at line 92 of file CDCRecoHit3D.cc.

{
  EStereoKind stereoKind = recoHit2D.getStereoKind();
 
  double arcLength2D = 0;
  if (stereoKind == EStereoKind::c_StereoU or stereoKind == EStereoKind::c_StereoV) {
    //the closest approach of a wire line to a helix
    //( in this case represented by the two trajectories )
    //can not be solved as a closed expression
    //in the common case the z fit has been derived from the reconstructed points generated
    //with the reconstruct method above in the other reconstruct method.
    //sticking to that method but using the average z from the sz fit
    ROOT::Math::XYZVector recoPos3D = recoHit2D.reconstruct3D(trajectory2D);
    arcLength2D = trajectory2D.calcArcLength2D(VectorUtil::getXYVector(recoPos3D));
 
  } else { /* if (stereoKind == EStereoKind::c_Axial)*/
    ROOT::Math::XYVector recoPos2D = trajectory2D.getClosest(recoHit2D.getRecoPos2D());
    arcLength2D = trajectory2D.calcArcLength2D(recoPos2D);
 
  }
 
  const double z = trajectorySZ.mapSToZ(arcLength2D);
 
  // Reevaluating the z position eventually accounts for wire sag.
  const CDCWire& wire = recoHit2D.getWire();
  const ROOT::Math::XYVector recoWirePos2D = wire.getWirePos2DAtZ(z);
  const ROOT::Math::XYVector correctedRecoPos2D = trajectory2D.getClosest(recoWirePos2D);
  const double correctedPerpS = trajectory2D.calcArcLength2D(correctedRecoPos2D);
  const double correctedZ = trajectorySZ.mapSToZ(correctedPerpS);
  const ROOT::Math::XYZVector correctedRecoPos3D(correctedRecoPos2D.X(), correctedRecoPos2D.Y(), correctedZ);
 
  CDCRecoHit3D result(recoHit2D.getRLWireHit(), correctedRecoPos3D, correctedPerpS);
  result.snapToDriftCircle();
  return result;
}

reconstruct() [4/5]

CDCRecoHit3D reconstruct ( const CDCRLWireHit & rlWireHit, const CDCTrajectory2D & trajectory2D )

static

Reconstructs the three dimensional hit from the wire hit and the given right left passage information by shifting it to a z coordinate, where it touches the two dimensional trajectory from the side indicated by the right left passage.

Definition at line 74 of file CDCRecoHit3D.cc.

{
  ROOT::Math::XYZVector recoPos3D = rlWireHit.reconstruct3D(trajectory2D);
  double arcLength2D = trajectory2D.calcArcLength2D(VectorUtil::getXYVector(recoPos3D));
  return CDCRecoHit3D(rlWireHit, recoPos3D, arcLength2D);
}

reconstruct() [5/5]

CDCRecoHit3D reconstruct ( const CDCWireHit * wireHit, ERightLeft rlInfo, const CDCTrajectory2D & trajectory2D )

static

Reconstructs the three dimensional hit from the wire hit and the given right left passage information by shifting it to a z coordinate, where it touches the two dimensional trajectory from the side indicated by the right left passage.

Definition at line 64 of file CDCRecoHit3D.cc.

{
  ROOT::Math::XYZVector recoPos3D = wireHit->reconstruct3D(trajectory2D, rlInfo);
  double arcLength2D = trajectory2D.calcArcLength2D(VectorUtil::getXYVector(recoPos3D));
  CDCRLWireHit rlWireHit(wireHit, rlInfo);
  return CDCRecoHit3D(rlWireHit, recoPos3D, arcLength2D);
}

reconstructNearest()

CDCRecoHit3D reconstructNearest ( const CDCWireHit * axialWireHit, const CDCTrajectory2D & trajectory2D )

static

Reconstruct a three dimensional hit from a wire hit (as in reconstruct(rlWireHit, trajectory2D)), but this time use a wire hit without a right-left information as an input.

The right-left information is chosen to be consistent with the reference position of the wire and the trajectory passed in to that function (by checking the sign of trackTrajectory2D.getDist2D(wireHit.getRefPos2D())).

This function is only sensible for axial hits (and asserts this).

Definition at line 130 of file CDCRecoHit3D.cc.

{
  B2ASSERT("This function can only be used with axial hits.", axialWireHit->isAxial());
  ERightLeft rlInfo = trajectory2D.isRightOrLeft(axialWireHit->getRefPos2D());
  CDCRLWireHit rlWireHit(axialWireHit, rlInfo);
  return CDCRecoHit3D::reconstruct(rlWireHit, trajectory2D);
}

reverse()

void reverse

(

)

Turns the orientation in place.

Changes the sign of the right left passage information, since the position remains the same by this reversion.

Definition at line 162 of file CDCRecoHit3D.cc.

{
  m_rlWireHit.reverse();
}

reversed()

CDCRecoHit3D reversed

(

)

const

Returns the recohit with the opposite right left information.

Definition at line 167 of file CDCRecoHit3D.cc.

{
  return CDCRecoHit3D(getRLWireHit().reversed(), getRecoPos3D(), -getArcLength2D());
}

setArcLength2D()

void setArcLength2D ( const double arcLength2D )

inline

Setter for the travel distance in the xy projection.

Definition at line 385 of file CDCRecoHit3D.h.

      {
        m_arcLength2D = arcLength2D;
      }

setRecoDriftLength()

void setRecoDriftLength	(	double	driftLength,
		bool	snapRecoPos )

Setter to update the drift length of the hit.

Definition at line 190 of file CDCRecoHit3D.cc.

{
  double oldDriftLength = m_rlWireHit.getRefDriftLength();
  m_rlWireHit.setRefDriftLength(driftLength);
  if (snapRecoPos) {
    bool switchSide = sign(oldDriftLength) != sign(driftLength);
    snapToDriftCircle(switchSide);
  }
}

setRecoPos3D()

void setRecoPos3D ( const ROOT::Math::XYZVector & recoPos3D )

inline

Setter for the 3d position of the hit.

Definition at line 298 of file CDCRecoHit3D.h.

      {
        m_recoPos3D = recoPos3D;
      }

setRLInfo()

void setRLInfo ( ERightLeft rlInfo )

inline

Setter the right left passage information.

Definition at line 280 of file CDCRecoHit3D.h.

      {
        m_rlWireHit.setRLInfo(rlInfo);
      }

setRLWireHit()

void setRLWireHit ( const CDCRLWireHit & rlWireHit )

inline

Setter for the oriented wire hit associated with the reconstructed hit.

Definition at line 263 of file CDCRecoHit3D.h.

      {
        m_rlWireHit = rlWireHit;
      }

shiftArcLength2D()

void shiftArcLength2D ( double arcLength2DOffSet )

inline

Adjust the travel distance by the given value.

Definition at line 373 of file CDCRecoHit3D.h.

      {
        m_arcLength2D += arcLength2DOffSet;
      }

snapToDriftCircle()

void snapToDriftCircle

(

bool

switchSide = false

)

Scales the displacement vector in place to lie on the drift circle.

Definition at line 172 of file CDCRecoHit3D.cc.

{
  const CDCWire& wire = getWire();
  const double recoPosZ = getRecoPos3D().z();
 
  ROOT::Math::XYVector wirePos = wire.getWirePos2DAtZ(recoPosZ);
  ROOT::Math::XYVector disp2D = VectorUtil::getXYVector(getRecoPos3D()) - wirePos;
 
  if (disp2D.R() != 0.0) {
    disp2D *= (std::fabs(getSignedRecoDriftLength()) / disp2D.R());
  }
  if (switchSide) {
    disp2D = -disp2D;
  }
  const auto& tmp = wirePos + disp2D;
  m_recoPos3D = ROOT::Math::XYZVector(tmp.X(), tmp.Y(), recoPosZ);
}

stereoProjectToRef()

CDCRecoHit2D stereoProjectToRef

(

)

const

Constructs a two dimensional reconstructed hit by carrying out the stereo !

projection to the wire reference position.

Definition at line 205 of file CDCRecoHit3D.cc.

{
  return getRecoHit2D();
}

Friends And Related Symbol Documentation

operator< [1/4]

bool operator< ( const CDC::CDCWire & wire, const CDCRecoHit3D & recoHit3D )

friend

Defines wires and the three dimensional reconstructed hits as coaligned.

Definition at line 197 of file CDCRecoHit3D.h.

      {
        return wire < recoHit3D.getRLWireHit();
      }

operator< [2/4]

bool operator< ( const CDCRecoHit3D & recoHit3D, const CDC::CDCWire & wire )

friend

Defines wires and the three dimensional reconstructed hits as coaligned.

Definition at line 191 of file CDCRecoHit3D.h.

      {
        return recoHit3D.getRLWireHit() < wire;
      }

operator< [3/4]

bool operator< ( const CDCRecoHit3D & recoHit3D, const CDCWireHit & wireHit )

friend

Defines wire hits and the three dimensional reconstructed hits as coaligned.

Definition at line 203 of file CDCRecoHit3D.h.

      {
        return recoHit3D.getRLWireHit() < wireHit;
      }

operator< [4/4]

bool operator< ( const CDCWireHit & wireHit, const CDCRecoHit3D & recoHit3D )

friend

Defines wire hits and the three dimensional reconstructed hits as coaligned.

Definition at line 209 of file CDCRecoHit3D.h.

      {
        return wireHit < recoHit3D.getRLWireHit();
      }

Member Data Documentation

m_arcLength2D

double m_arcLength2D = 0

private

Memory for the travel distance as see in the xy projection.

Definition at line 404 of file CDCRecoHit3D.h.

m_recoPos3D

ROOT::Math::XYZVector m_recoPos3D

private

Memory for the reconstructed hit position.

Definition at line 401 of file CDCRecoHit3D.h.

m_rlWireHit

CDCRLWireHit m_rlWireHit

private

Memory for the oriented wire hit reference.

Definition at line 398 of file CDCRecoHit3D.h.

---

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

• tracking/trackingUtilities/eventdata/hits/include/CDCRecoHit3D.h
• tracking/trackingUtilities/eventdata/hits/src/CDCRecoHit3D.cc