DTRecSegment4D Class Reference

#include <DTRecSegment4D.h>

Inheritance diagram for DTRecSegment4D:

Public Member Functions
virtual DTChamberId	chamberId () const
	The (specific) DetId of the chamber on which the segment resides. More...
virtual double	chi2 () const
	Chi2 of the segment fit. More...
virtual DTRecSegment4D *	clone () const
virtual int	degreesOfFreedom () const
	Degrees of freedom of the segment fit. More...
virtual int	dimension () const
	Dimension (in parameter space) More...
	DTRecSegment4D ()
	Empty constructor. More...
	DTRecSegment4D (const DTChamberRecSegment2D &phiSeg, const DTSLRecSegment2D &zedSeg, const LocalPoint &posZInCh, const LocalVector &dirZInCh)
	Construct from phi and Z projections. More...
	DTRecSegment4D (const DTChamberRecSegment2D &phiSeg)
	Construct from phi projection. More...
	DTRecSegment4D (const DTSLRecSegment2D &zedSeg, const LocalPoint &posZInCh, const LocalVector &dirZInCh)
	Construct from Z projection. More...
bool	hasPhi () const
	Does it have the Phi projection? More...
bool	hasZed () const
	Does it have the Z projection? More...
virtual LocalVector	localDirection () const
	Local direction in Chamber frame. More...
virtual LocalError	localDirectionError () const
	Local direction error in the Chamber frame. More...
virtual LocalPoint	localPosition () const
	Local position in Chamber frame. More...
virtual LocalError	localPositionError () const
	Local position error in Chamber frame. More...
AlgebraicVector	parameters () const
AlgebraicSymMatrix	parametersError () const
	Covariance matrix fo parameters() More...
const DTChamberRecSegment2D *	phiSegment () const
	The superPhi segment: 0 if no phi projection available. More...
virtual AlgebraicMatrix	projectionMatrix () const
	The projection matrix relates the trajectory state parameters to the segment parameters(). More...
virtual std::vector< const TrackingRecHit * >	recHits () const
	Access to component RecHits (if any) More...
virtual std::vector < TrackingRecHit * >	recHits ()
	Non-const access to component RecHits (if any) More...
void	setCovMatrix (AlgebraicSymMatrix mat)
	Set covariance matrix. More...
void	setDirection (LocalVector dir)
	Set direction. More...
void	setPosition (LocalPoint pos)
	Set position. More...
const DTSLRecSegment2D *	zSegment () const
	The Z segment: 0 if not zed projection available. More...
	~DTRecSegment4D ()
	Destructor. More...
Public Member Functions inherited from RecSegment
	RecSegment (DetId id)
	RecSegment (TrackingRecHit::id_type id=0)
virtual	~RecSegment ()
	Destructor. More...
Public Member Functions inherited from TrackingRecHit
DetId	geographicalId () const
virtual void	getKfComponents (KfComponentsHolder &holder) const
unsigned int	getRTTI () const
Type	getType () const
virtual bool	hasPositionAndError () const
	to be redefined by daughter class More...
bool	isValid () const
id_type	rawId () const
virtual void	recHitsV (std::vector< const TrackingRecHit * > &) const
virtual void	recHitsV (std::vector< TrackingRecHit * > &)
virtual bool	sharesInput (const TrackingRecHit *other, SharedInputType what) const
	TrackingRecHit (DetId id, Type type=valid)
	TrackingRecHit (id_type id=0, Type type=valid)
	TrackingRecHit (DetId id, unsigned int rt, Type type=valid)
Type	type () const
virtual float	weight () const
virtual	~TrackingRecHit ()

Private Types
enum	Projection { full, phi, Z, none }
	Which projections are actually there. More...

Private Member Functions
DTChamberRecSegment2D *	phiSegment ()
	the superPhi segment More...
void	setCovMatrixForZed (const LocalPoint &posZInCh)
DTSLRecSegment2D *	zSegment ()
	the Z segment More...

Private Attributes
AlgebraicSymMatrix	theCovMatrix
int	theDimension
LocalVector	theDirection
DTChamberRecSegment2D	thePhiSeg
LocalPoint	thePosition
Projection	theProjection
DTSLRecSegment2D	theZedSeg

Friends
class	DTSegmentUpdator

Additional Inherited Members
Public Types inherited from TrackingRecHit
typedef unsigned int	id_type
enum	SharedInputType { all, some }
	definition of equality via shared input More...
enum	Type { valid = 0, missing = 1, inactive = 2, bad = 3 }
Static Public Attributes inherited from TrackingRecHit
static const int	rttiShift = 24
static const int	typeMask = 0xf
Protected Member Functions inherited from TrackingRecHit
void	setId (id_type iid)
void	setRTTI (unsigned int rt)
void	setType (Type ttype)

Detailed Description

4-parameter RecHits for MuonBarrel DT (x,y, dx/dz, dy/dz)

Date:

2009/10/20 09:06:12

Revision:

1.12

Author

Stefano Lacaprara - INFN Legnaro stefa.nosp@m.no.l.nosp@m.acapr.nosp@m.ara@.nosp@m.pd.in.nosp@m.fn.i.nosp@m.t

Riccardo Bellan - INFN TO ricca.nosp@m.rdo..nosp@m.bella.nosp@m.n@ce.nosp@m.rn.ch

Definition at line 25 of file DTRecSegment4D.h.

Member Enumeration Documentation

enum DTRecSegment4D::Projection

private

Which projections are actually there.

Enumerator
full
phi
Z
none

Definition at line 121 of file DTRecSegment4D.h.

{full, phi, Z, none};

Constructor & Destructor Documentation

DTRecSegment4D::DTRecSegment4D ( )

inline

Empty constructor.

Definition at line 30 of file DTRecSegment4D.h.

Referenced by clone().

: theProjection(none), theDimension(0) {}

DTRecSegment4D::DTRecSegment4D	(	const DTChamberRecSegment2D &	phiSeg,
		const DTSLRecSegment2D &	zedSeg,
		const LocalPoint &	posZInCh,
		const LocalVector &	dirZInCh
	)

Construct from phi and Z projections.

Definition at line 19 of file DTRecSegment4D.cc.

References funct::cos(), DTRecSegment2D::covMatrix(), DTChamberId, edm::hlt::Exception, TrackingRecHit::geographicalId(), DTRecSegment2D::localDirection(), DTRecSegment2D::localPosition(), DetId::rawId(), setCovMatrixForZed(), theCovMatrix, theDirection, thePosition, PV3DBase< T, PVType, FrameType >::theta(), Vector3DBase< T, FrameTag >::unit(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                               :
  RecSegment(phiSeg.chamberId()), 
  theProjection(full),
  thePhiSeg(phiSeg),
  theZedSeg(zedSeg),
  theDimension(4)
{
  // Check consistency of 2 sub-segments
  if(DTChamberId(phiSeg.geographicalId().rawId()) != DTChamberId(zedSeg.geographicalId().rawId()))
    throw cms::Exception("DTRecSegment4D")
      <<"the z Segment and the phi segment have different chamber id"<<std::endl;

  // The position of 2D segments are defined in the SL frame: I must first
  // extrapolate that position at the Chamber reference plane
  LocalPoint posZAt0 = posZInCh +
    dirZInCh * (-posZInCh.z())/cos(dirZInCh.theta());


  thePosition=LocalPoint(phiSeg.localPosition().x(),posZAt0.y(),0.);
  LocalVector dirPhiInCh=phiSeg.localDirection();

  // given the actual definition of chamber refFrame, (with z poiniting to IP),
  // the zed component of direction is negative.
  theDirection=LocalVector(dirPhiInCh.x()/fabs(dirPhiInCh.z()),
                           dirZInCh.y()/fabs(dirZInCh.z()),
                           -1.);
  theDirection=theDirection.unit();

  // set cov matrix
  theCovMatrix=AlgebraicSymMatrix(4);
  theCovMatrix[0][0]=phiSeg.covMatrix()[0][0]; //sigma (dx/dz)
  theCovMatrix[0][2]=phiSeg.covMatrix()[0][1]; //cov(dx/dz,x)
  theCovMatrix[2][2]=phiSeg.covMatrix()[1][1]; //sigma (x)
  setCovMatrixForZed(posZInCh);
}

DTRecSegment4D::DTRecSegment4D

(

const DTChamberRecSegment2D &

phiSeg

)

Construct from phi projection.

Definition at line 59 of file DTRecSegment4D.cc.

References DTRecSegment2D::covMatrix(), DTRecSegment2D::localDirection(), DTRecSegment2D::localPosition(), theCovMatrix, theDirection, thePhiSeg, and thePosition.

                                                                  :
  RecSegment(phiSeg.chamberId()), 
  theProjection(phi),
  thePhiSeg(phiSeg),
  theZedSeg(DTSLRecSegment2D()),
  theDimension(2)
{
  thePosition=thePhiSeg.localPosition();
  
  theDirection=thePhiSeg.localDirection();

  // set cov matrix
  theCovMatrix=AlgebraicSymMatrix(4);
  theCovMatrix[0][0]=phiSeg.covMatrix()[0][0]; //sigma (dx/dz)
  theCovMatrix[0][2]=phiSeg.covMatrix()[0][1]; //cov(dx/dz,x)
  theCovMatrix[2][2]=phiSeg.covMatrix()[1][1]; //sigma (x)
}

DTRecSegment4D::DTRecSegment4D	(	const DTSLRecSegment2D &	zedSeg,
		const LocalPoint &	posZInCh,
		const LocalVector &	dirZInCh
	)

Construct from Z projection.

Definition at line 78 of file DTRecSegment4D.cc.

References funct::cos(), setCovMatrixForZed(), theCovMatrix, theDirection, thePosition, PV3DBase< T, PVType, FrameType >::theta(), and PV3DBase< T, PVType, FrameType >::z().

                                                :
  RecSegment(zedSeg.superLayerId().chamberId()),
  theProjection(Z),
  thePhiSeg(DTChamberRecSegment2D()),
  theZedSeg(zedSeg),
  theDimension(2)
{
  
  LocalPoint posZAt0=posZInCh+
    dirZInCh*(-posZInCh.z()/cos(dirZInCh.theta()));
  
  thePosition=posZAt0;
  theDirection = dirZInCh;

  // set cov matrix
  theCovMatrix=AlgebraicSymMatrix(4);
  setCovMatrixForZed(posZInCh);
}

DTRecSegment4D::~DTRecSegment4D

(

)

Destructor.

Definition at line 100 of file DTRecSegment4D.cc.

{}

Member Function Documentation

DTChamberId DTRecSegment4D::chamberId ( ) const

virtual

The (specific) DetId of the chamber on which the segment resides.

Definition at line 276 of file DTRecSegment4D.cc.

References DTChamberId, and TrackingRecHit::geographicalId().

Referenced by FWDTSegmentProxyBuilder::buildViewType(), DTTrigGeomUtils::computeSCCoordinates(), DTSegmentUpdator::fit(), DTChamberEfficiencyTask::interpolate(), DTChamberEfficiencyTask::isGoodSegment(), and DTLocalTriggerTask::runSegmentAnalysis().

                                            {
  return DTChamberId(geographicalId());
}

double DTRecSegment4D::chi2 ( ) const

virtual

Chi2 of the segment fit.

Implements RecSegment.

Definition at line 191 of file DTRecSegment4D.cc.

References DTRecSegment2D::chi2(), hasPhi(), hasZed(), query::result, thePhiSeg, and theZedSeg.

Referenced by DTChamberEfficiencyTask::getBestSegment(), DTChamberEfficiencyTask::isGoodSegment(), DTSegmentSelector::operator()(), and operator<<().

                                  {
  double result=0;
  if (hasPhi()) result+=thePhiSeg.chi2();
  if (hasZed()) result+=theZedSeg.chi2();
  return result;
}

virtual DTRecSegment4D* DTRecSegment4D::clone ( void  ) const

inlinevirtual

Implements TrackingRecHit.

Definition at line 46 of file DTRecSegment4D.h.

References DTRecSegment4D().

Referenced by DTSegment4DT0Corrector::produce().

{ return new DTRecSegment4D(*this);}

int DTRecSegment4D::degreesOfFreedom ( ) const

virtual

Degrees of freedom of the segment fit.

Implements RecSegment.

Definition at line 199 of file DTRecSegment4D.cc.

References DTRecSegment2D::degreesOfFreedom(), hasPhi(), hasZed(), query::result, thePhiSeg, and theZedSeg.

Referenced by DTChamberEfficiencyTask::getBestSegment(), DTChamberEfficiencyTask::isGoodSegment(), DTSegmentSelector::operator()(), and operator<<().

                                           {
  int result=0;
  if (hasPhi()) result+=thePhiSeg.degreesOfFreedom();
  if (hasZed()) result+=theZedSeg.degreesOfFreedom();
  return result;
}

virtual int DTRecSegment4D::dimension ( ) const

inlinevirtual

Dimension (in parameter space)

Implements RecSegment.

Definition at line 79 of file DTRecSegment4D.h.

References theDimension.

Referenced by DTCalibValidation::compute(), operator<<(), parameters(), parametersError(), and projectionMatrix().

{ return theDimension; }

bool DTRecSegment4D::hasPhi ( ) const

inline

Does it have the Phi projection?

Definition at line 92 of file DTRecSegment4D.h.

References full, phi, and theProjection.

Referenced by TrackDetectorAssociator::addTAMuonSegmentMatch(), DTChamberEfficiencyTask::analyze(), DTSegmentUpdator::calculateT0corr(), chi2(), degreesOfFreedom(), DTSegmentUpdator::fit(), DTChamberEfficiencyTask::getBestSegment(), MuonAssociatorByHits::getMatchedIds(), TrackerMuonHitExtractor::getMuonHits(), DTChamberEfficiencyTask::interpolate(), DTChamberEfficiencyTask::isGoodSegment(), MuonResidualsFromTrack::MuonResidualsFromTrack(), DTSegmentSelector::operator()(), operator<<(), phiSegment(), MuonTrackProducer::produce(), recHits(), MuonTrackDT13ChamberResidual::setSegmentResidual(), StateSegmentMatcher::StateSegmentMatcher(), CosmicMuonTrajectoryBuilder::t0(), and DTSegmentUpdator::update().

{return (theProjection==full || theProjection==phi);}

bool DTRecSegment4D::hasZed ( ) const

inline

Does it have the Z projection?

Definition at line 95 of file DTRecSegment4D.h.

References full, theProjection, and Z.

Referenced by TrackDetectorAssociator::addTAMuonSegmentMatch(), DTChamberEfficiencyTask::analyze(), DTSegmentUpdator::calculateT0corr(), chi2(), degreesOfFreedom(), DTSegmentUpdator::fit(), DTChamberEfficiencyTask::getBestSegment(), MuonAssociatorByHits::getMatchedIds(), TrackerMuonHitExtractor::getMuonHits(), DTChamberEfficiencyTask::interpolate(), DTChamberEfficiencyTask::isGoodSegment(), MuonResidualsFromTrack::MuonResidualsFromTrack(), DTSegmentSelector::operator()(), operator<<(), MuonTrackProducer::produce(), recHits(), MuonTrackDT2ChamberResidual::setSegmentResidual(), StateSegmentMatcher::StateSegmentMatcher(), DTSegmentUpdator::update(), and zSegment().

{return (theProjection==full || theProjection==Z);}

virtual LocalVector DTRecSegment4D::localDirection ( ) const

inlinevirtual

Local direction in Chamber frame.

Implements RecSegment.

Definition at line 67 of file DTRecSegment4D.h.

References theDirection.

Referenced by DTSegment4DQuality::analyze(), FWDTSegmentProxyBuilder::buildViewType(), DTRecHitSegmentResidual::compute(), DTCalibValidation::compute(), DTTrigGeomUtils::computeSCCoordinates(), DTSegmentSelector::operator()(), operator<<(), DTCombinatorialPatternReco4D::segmentSpecialZed(), DTResidualCalibration::segmentToWireDistance(), and DTSegmentUpdator::update().

{ return theDirection; }

LocalError DTRecSegment4D::localDirectionError ( ) const

virtual

Local direction error in the Chamber frame.

Implements RecSegment.

Definition at line 186 of file DTRecSegment4D.cc.

References theCovMatrix.

Referenced by DTSegment4DQuality::analyze().

                                                     {
  return LocalError(theCovMatrix[0][0],theCovMatrix[0][1],theCovMatrix[1][1]);
}

virtual LocalPoint DTRecSegment4D::localPosition ( ) const

inlinevirtual

Local position in Chamber frame.

Implements TrackingRecHit.

Definition at line 61 of file DTRecSegment4D.h.

References thePosition.

Referenced by DTSegment4DQuality::analyze(), DTChamberEfficiencyTask::analyze(), FWDTSegmentProxyBuilder::buildViewType(), DTRecHitSegmentResidual::compute(), DTCalibValidation::compute(), DTTrigGeomUtils::computeSCCoordinates(), DTChamberEfficiencyTask::interpolate(), operator<<(), DTCombinatorialPatternReco4D::segmentSpecialZed(), DTResidualCalibration::segmentToWireDistance(), and DTSegmentUpdator::update().

{ return thePosition;}

LocalError DTRecSegment4D::localPositionError ( ) const

virtual

Local position error in Chamber frame.

Implements TrackingRecHit.

Definition at line 181 of file DTRecSegment4D.cc.

References theCovMatrix.

Referenced by DTSegment4DQuality::analyze().

                                                    {
  return LocalError(theCovMatrix[2][2],theCovMatrix[2][3],theCovMatrix[3][3]);
}

AlgebraicVector DTRecSegment4D::parameters ( void  ) const

virtual

Parameters of the segment, for the track fit. For a 4D segment: (dx/dy,dy/dz,x,y) For a 2D, phi-only segment: (dx/dz,x) For a 2D, Z-only segment: (dy/dz,y)

Implements TrackingRecHit.

Definition at line 103 of file DTRecSegment4D.cc.

References dimension(), phi, query::result, theDirection, thePosition, theProjection, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), PV3DBase< T, PVType, FrameType >::z(), and Z.

Referenced by ChamberSegmentUtility::getDTRHmap(), Vispa.Plugins.ConfigEditor.ConfigDataAccessor.ConfigDataAccessor::inputTags(), Vispa.Plugins.ConfigEditor.ConfigDataAccessor.ConfigDataAccessor::properties(), Vispa.Plugins.ConfigEditor.ConfigDataAccessor.ConfigDataAccessor::recursePSetProperties(), and StateSegmentMatcher::StateSegmentMatcher().

                                                 {
  if (dimension()==4) {
    // (dx/dz,dy/dz,x,y)
    AlgebraicVector result(4);
    result[2] = thePosition.x();
    result[3] = thePosition.y();
    result[0] = theDirection.x()/theDirection.z();
    result[1] = theDirection.y()/theDirection.z();    
    return result;
  } 

  AlgebraicVector result(2);
  if (theProjection==phi) {
    // (dx/dz,x)  
    result[1] = thePosition.x();
    result[0] = theDirection.x()/theDirection.z();
  } else if (theProjection==Z) {
    // (dy/dz,y) (note we are in the chamber r.f.)
    result[1] = thePosition.y();
    result[0] = theDirection.y()/theDirection.z();
  }
  return result;
}

AlgebraicSymMatrix DTRecSegment4D::parametersError ( ) const

virtual

Covariance matrix fo parameters()

Implements TrackingRecHit.

Definition at line 128 of file DTRecSegment4D.cc.

References dimension(), phi, query::result, theCovMatrix, theProjection, and Z.

Referenced by StateSegmentMatcher::StateSegmentMatcher().

                                                         { 

  if (dimension()==4) {
    return theCovMatrix;
  }

  AlgebraicSymMatrix result(2);
  if (theProjection==phi) {
    result[0][0] = theCovMatrix[0][0]; //S(dx/dz)
    result[0][1] = theCovMatrix[0][2]; //Cov(dx/dz,x)
    result[1][1] = theCovMatrix[2][2]; //S(x)
  } else if (theProjection==Z) {
    result[0][0] = theCovMatrix[1][1]; //S(dy/dz)
    result[0][1] = theCovMatrix[1][3]; //Cov(dy/dz,y)
    result[1][1] = theCovMatrix[3][3]; //S(y)
  }
  return result;
}

const DTChamberRecSegment2D* DTRecSegment4D::phiSegment ( ) const

inline

The superPhi segment: 0 if no phi projection available.

Definition at line 98 of file DTRecSegment4D.h.

References hasPhi(), and thePhiSeg.

Referenced by TrackDetectorAssociator::addTAMuonSegmentMatch(), SegmentTrackAnalyzer::analyze(), DTLocalTriggerLutTask::analyze(), DTLocalTriggerSynchTask::analyze(), FWDTSegmentProxyBuilder::buildViewType(), DTSegmentUpdator::calculateT0corr(), DTCalibValidation::compute(), DTSegmentUpdator::fit(), DTChamberEfficiencyTask::getBestSegment(), MuonAssociatorByHits::getMatchedIds(), TrackerMuonHitExtractor::getMuonHits(), DTChamberEfficiencyTask::isGoodSegment(), DTSegmentSelector::operator()(), operator<<(), MuonTrackProducer::produce(), recHits(), DTLocalTriggerTask::runSegmentAnalysis(), DTCombinatorialPatternReco4D::segmentSpecialZed(), MuonTrackDT13ChamberResidual::setSegmentResidual(), CosmicMuonTrajectoryBuilder::t0(), and DTSegmentUpdator::update().

                                                  {
    return hasPhi()? &thePhiSeg: 0;
  }

DTChamberRecSegment2D* DTRecSegment4D::phiSegment ( )

inlineprivate

the superPhi segment

Definition at line 125 of file DTRecSegment4D.h.

References thePhiSeg.

{return &thePhiSeg;}

AlgebraicMatrix DTRecSegment4D::projectionMatrix ( ) const

virtual

The projection matrix relates the trajectory state parameters to the segment parameters().

Implements TrackingRecHit.

Definition at line 148 of file DTRecSegment4D.cc.

References dimension(), phi, theProjection, and Z.

                                                       {
  static bool isInitialized=false;
  static AlgebraicMatrix the4DProjectionMatrix(4, 5, 0); 
  static AlgebraicMatrix the2DPhiProjMatrix(2, 5, 0);
  static AlgebraicMatrix the2DZProjMatrix(2, 5, 0);

  if (!isInitialized) {
    the4DProjectionMatrix[0][1] = 1;
    the4DProjectionMatrix[1][2] = 1;
    the4DProjectionMatrix[2][3] = 1;
    the4DProjectionMatrix[3][4] = 1;

    the2DPhiProjMatrix[0][1] = 1;
    the2DPhiProjMatrix[1][3] = 1;

    the2DZProjMatrix[0][2] = 1;
    the2DZProjMatrix[1][4] = 1;

    isInitialized= true;
  }

  if (dimension()==4) { 
    return the4DProjectionMatrix;
  } else if (theProjection==phi) {
    return the2DPhiProjMatrix;
  } else if (theProjection==Z) {
    return the2DZProjMatrix;
  } else {
    return AlgebraicMatrix();
  }
}

std::vector< const TrackingRecHit * > DTRecSegment4D::recHits ( ) const

virtual

Access to component RecHits (if any)

Implements TrackingRecHit.

Definition at line 254 of file DTRecSegment4D.cc.

References hasPhi(), hasZed(), phiSegment(), and zSegment().

                                                              {
  std::vector<const TrackingRecHit*> pointersOfRecHits; 

  if (hasPhi()) pointersOfRecHits.push_back(phiSegment());
  if (hasZed()) pointersOfRecHits.push_back(zSegment());

  return pointersOfRecHits;
}

std::vector< TrackingRecHit * > DTRecSegment4D::recHits ( )

virtual

Non-const access to component RecHits (if any)

Implements TrackingRecHit.

Definition at line 265 of file DTRecSegment4D.cc.

References hasPhi(), hasZed(), phiSegment(), and zSegment().

                                                  {

  std::vector<TrackingRecHit*> pointersOfRecHits; 

  if (hasPhi()) pointersOfRecHits.push_back(phiSegment());
  if (hasZed()) pointersOfRecHits.push_back(zSegment());
  
  return pointersOfRecHits;
}

void DTRecSegment4D::setCovMatrix ( AlgebraicSymMatrix  mat )

inline

Set covariance matrix.

Definition at line 114 of file DTRecSegment4D.h.

References theCovMatrix.

Referenced by DTSegmentUpdator::fit().

{ theCovMatrix = mat; }

void DTRecSegment4D::setCovMatrixForZed ( const LocalPoint &  posZInCh )

private

Definition at line 207 of file DTRecSegment4D.cc.

References DTRecSegment2D::parametersError(), theCovMatrix, theZedSeg, and PV3DBase< T, PVType, FrameType >::z().

Referenced by DTRecSegment4D(), and DTSegmentUpdator::fit().

                                                                 {
  // Warning!!! the covariance matrix for Theta SL segment is defined in the SL
  // reference frame, here that in the Chamber ref frame must be used.
  // For direction, no problem, but the position is extrapolated, so we must
  // propagate the error properly.

  // many thanks to Paolo Ronchese for the help in deriving the formulas!

  // y=m*z+q in SL frame
  // y=m'*z+q' in CH frame

  // var(m') = var(m)
  theCovMatrix[1][1] = theZedSeg.parametersError()[0][0]; //sigma (dy/dz)

  // cov(m',q') = DeltaZ*Var(m) + Cov(m,q)
  theCovMatrix[1][3] =
    posZInCh.z()*theZedSeg.parametersError()[0][0]+
    theZedSeg.parametersError()[0][1]; //cov(dy/dz,y)

  // Var(q') = DeltaZ^2*Var(m) + Var(q) + 2*DeltaZ*Cov(m,q)
  // cout << "Var(q') = DeltaZ^2*Var(m) + Var(q) + 2*DeltaZ*Cov(m,q)" << endl;
  // cout << "Var(q')= " << posZInCh.z()*posZInCh.z() << "*" <<
  //   theZedSeg.parametersError()[0][0] << " + " << 
  //   theZedSeg.parametersError()[1][1] << " + " << 
  //   2*posZInCh.z() << "*" << theZedSeg.parametersError()[0][1] ;
  theCovMatrix[3][3] =
    2.*(posZInCh.z()*posZInCh.z())*theZedSeg.parametersError()[0][0] +
    theZedSeg.parametersError()[1][1] +
    2.*posZInCh.z()*theZedSeg.parametersError()[0][1];
  // cout << " = " << theCovMatrix[3][3] << endl;
}

void DTRecSegment4D::setDirection ( LocalVector  dir )

inline

Set direction.

Definition at line 111 of file DTRecSegment4D.h.

References dir, and theDirection.

Referenced by DTSegmentUpdator::fit().

{ theDirection = dir; }

void DTRecSegment4D::setPosition ( LocalPoint  pos )

inline

Set position.

Definition at line 108 of file DTRecSegment4D.h.

References pos, and thePosition.

Referenced by DTSegmentUpdator::fit().

{ thePosition = pos; }

const DTSLRecSegment2D* DTRecSegment4D::zSegment ( ) const

inline

The Z segment: 0 if not zed projection available.

Definition at line 103 of file DTRecSegment4D.h.

References hasZed(), and theZedSeg.

Referenced by DTSegment4DQuality::analyze(), FWDTSegmentProxyBuilder::buildViewType(), DTSegmentUpdator::calculateT0corr(), DTCalibValidation::compute(), DTSegmentUpdator::fit(), DTChamberEfficiencyTask::getBestSegment(), MuonAssociatorByHits::getMatchedIds(), DTChamberEfficiencyTask::isGoodSegment(), DTSegmentSelector::operator()(), operator<<(), recHits(), DTCombinatorialPatternReco4D::segmentSpecialZed(), and DTSegmentUpdator::update().

                                           {
    return hasZed()? &theZedSeg : 0;
  }

DTSLRecSegment2D* DTRecSegment4D::zSegment ( )

inlineprivate

the Z segment

Definition at line 128 of file DTRecSegment4D.h.

References theZedSeg.

{return &theZedSeg;}

Friends And Related Function Documentation

friend class DTSegmentUpdator

friend

Definition at line 28 of file DTRecSegment4D.h.

Member Data Documentation

AlgebraicSymMatrix DTRecSegment4D::theCovMatrix

private

Definition at line 142 of file DTRecSegment4D.h.

Referenced by DTRecSegment4D(), localDirectionError(), localPositionError(), parametersError(), setCovMatrix(), and setCovMatrixForZed().

int DTRecSegment4D::theDimension

private

Definition at line 147 of file DTRecSegment4D.h.

Referenced by dimension().

LocalVector DTRecSegment4D::theDirection

private

Definition at line 131 of file DTRecSegment4D.h.

Referenced by DTRecSegment4D(), localDirection(), parameters(), and setDirection().

DTChamberRecSegment2D DTRecSegment4D::thePhiSeg

private

Definition at line 144 of file DTRecSegment4D.h.

Referenced by chi2(), degreesOfFreedom(), DTRecSegment4D(), and phiSegment().

LocalPoint DTRecSegment4D::thePosition

private

Definition at line 130 of file DTRecSegment4D.h.

Referenced by DTRecSegment4D(), localPosition(), parameters(), and setPosition().

Projection DTRecSegment4D::theProjection

private

Definition at line 122 of file DTRecSegment4D.h.

Referenced by hasPhi(), hasZed(), parameters(), parametersError(), and projectionMatrix().

DTSLRecSegment2D DTRecSegment4D::theZedSeg

private

Definition at line 145 of file DTRecSegment4D.h.

Referenced by chi2(), degreesOfFreedom(), setCovMatrixForZed(), and zSegment().