Public Member Functions
GlobalVector	extrapolateTrackMomToPoint (const reco::GsfTrack &gsfTrack, const GlobalPoint &pointToExtrapTo)
GlobalPoint	extrapolateTrackPosToPoint (const reco::GsfTrack &gsfTrack, const GlobalPoint &pointToExtrapTo)
const MultiTrajectoryStateMode *	mtsMode () const
const MultiTrajectoryStateTransform *	mtsTransform () const
TrackExtrapolator *	operator= (const TrackExtrapolator &rhs)
void	setup (const edm::EventSetup &iSetup)
edm::ESHandle< TrackerGeometry >	trackerGeomHandle () const
	TrackExtrapolator (const TrackExtrapolator &rhs)
	TrackExtrapolator ()
	~TrackExtrapolator ()
Private Attributes
unsigned long long	cacheIDMagField_
unsigned long long	cacheIDTDGeom_
edm::ESHandle< MagneticField >	magField_
MultiTrajectoryStateMode	mtsMode_
const MultiTrajectoryStateTransform *	mtsTransform_
edm::ESHandle< TrackerGeometry >	trackerHandle_

Detailed Description

Definition at line 36 of file EgammaHLTGsfTrackVarProducer.h.

Constructor & Destructor Documentation

EgammaHLTGsfTrackVarProducer::TrackExtrapolator::TrackExtrapolator ( ) [inline]

Definition at line 50 of file EgammaHLTGsfTrackVarProducer.h.

:cacheIDTDGeom_(0),cacheIDMagField_(0),mtsTransform_(0){}

EgammaHLTGsfTrackVarProducer::TrackExtrapolator::TrackExtrapolator ( const TrackExtrapolator & rhs )

Definition at line 160 of file EgammaHLTGsfTrackVarProducer.cc.

References mtsTransform_.

                                                                                                                        :
  cacheIDTDGeom_(rhs.cacheIDTDGeom_),
  cacheIDMagField_(rhs.cacheIDMagField_),
  magField_(rhs.magField_),
  trackerHandle_(rhs.trackerHandle_),
  mtsMode_(rhs.mtsMode_)
 
{
  if(rhs.mtsTransform_) mtsTransform_ = new MultiTrajectoryStateTransform(*rhs.mtsTransform_);
  else mtsTransform_ =0;
    
}

EgammaHLTGsfTrackVarProducer::TrackExtrapolator::~TrackExtrapolator ( ) [inline]

Definition at line 52 of file EgammaHLTGsfTrackVarProducer.h.

References mtsTransform_.

{delete mtsTransform_;}

Member Function Documentation

GlobalVector EgammaHLTGsfTrackVarProducer::TrackExtrapolator::extrapolateTrackMomToPoint	(	const reco::GsfTrack &	gsfTrack,
		const GlobalPoint &	pointToExtrapTo
	)

Definition at line 220 of file EgammaHLTGsfTrackVarProducer.cc.

{
  TrajectoryStateOnSurface innTSOS = mtsTransform()->innerStateOnSurface(gsfTrack);
  TrajectoryStateOnSurface posTSOS = mtsTransform()->extrapolatedState(innTSOS,pointToExtrapTo);
  GlobalVector  extrapolatedMom;
  mtsMode()->momentumFromModeCartesian(posTSOS,extrapolatedMom);
  return extrapolatedMom;
}

GlobalPoint EgammaHLTGsfTrackVarProducer::TrackExtrapolator::extrapolateTrackPosToPoint	(	const reco::GsfTrack &	gsfTrack,
		const GlobalPoint &	pointToExtrapTo
	)

Definition at line 211 of file EgammaHLTGsfTrackVarProducer.cc.

Referenced by EgammaHLTGsfTrackVarProducer::produce().

{
  TrajectoryStateOnSurface innTSOS = mtsTransform()->innerStateOnSurface(gsfTrack);
  TrajectoryStateOnSurface posTSOS = mtsTransform()->extrapolatedState(innTSOS,pointToExtrapTo);
  GlobalPoint  extrapolatedPos;
  mtsMode()->positionFromModeCartesian(posTSOS,extrapolatedPos);
  return extrapolatedPos;
}

const MultiTrajectoryStateMode* EgammaHLTGsfTrackVarProducer::TrackExtrapolator::mtsMode ( ) const [inline]

Definition at line 63 of file EgammaHLTGsfTrackVarProducer.h.

References mtsMode_.

{return &mtsMode_;}

const MultiTrajectoryStateTransform* EgammaHLTGsfTrackVarProducer::TrackExtrapolator::mtsTransform ( ) const [inline]

Definition at line 62 of file EgammaHLTGsfTrackVarProducer.h.

References mtsTransform_.

{return mtsTransform_;}

EgammaHLTGsfTrackVarProducer::TrackExtrapolator * EgammaHLTGsfTrackVarProducer::TrackExtrapolator::operator= ( const TrackExtrapolator & rhs )

Definition at line 173 of file EgammaHLTGsfTrackVarProducer.cc.

References cacheIDMagField_, cacheIDTDGeom_, magField_, mtsMode_, mtsTransform_, and trackerHandle_.

{ 
  if(this!=&rhs){ //just to ensure we're not copying ourselves
    cacheIDTDGeom_ = rhs.cacheIDTDGeom_;
    cacheIDMagField_ = rhs.cacheIDMagField_;
    magField_ = rhs.magField_;
    trackerHandle_ = rhs.trackerHandle_;
    mtsMode_ = rhs.mtsMode_;
    
    delete mtsTransform_;
    if(rhs.mtsTransform_) mtsTransform_ = new MultiTrajectoryStateTransform(*rhs.mtsTransform_);
    else mtsTransform_ =0;
  }
  return this;
}

void EgammaHLTGsfTrackVarProducer::TrackExtrapolator::setup ( const edm::EventSetup & iSetup )

Definition at line 189 of file EgammaHLTGsfTrackVarProducer.cc.

References edm::eventsetup::EventSetupRecord::cacheIdentifier(), and edm::EventSetup::get().

Referenced by EgammaHLTGsfTrackVarProducer::produce().

{
  bool updateField(false);
  if (cacheIDMagField_!=iSetup.get<IdealMagneticFieldRecord>().cacheIdentifier()){
    updateField = true;
    cacheIDMagField_=iSetup.get<IdealMagneticFieldRecord>().cacheIdentifier();
    iSetup.get<IdealMagneticFieldRecord>().get(magField_);
  }
  
  bool updateGeometry(false);
  if (cacheIDTDGeom_!=iSetup.get<TrackerDigiGeometryRecord>().cacheIdentifier()){
    updateGeometry = true;
    cacheIDTDGeom_=iSetup.get<TrackerDigiGeometryRecord>().cacheIdentifier();
    iSetup.get<TrackerDigiGeometryRecord>().get(trackerHandle_);
  }
  
  if ( updateField || updateGeometry || !mtsTransform_ ) {
    delete mtsTransform_;
    mtsTransform_ = new MultiTrajectoryStateTransform(trackerHandle_.product(),magField_.product());
  }
}