TransverseImpactPointExtrapolator Class Reference

#include <TransverseImpactPointExtrapolator.h>

Public Member Functions
TrajectoryStateOnSurface	extrapolate (const FreeTrajectoryState &fts, const GlobalPoint &vtx) const
	extrapolation with default (=geometrical) propagator More...
TrajectoryStateOnSurface	extrapolate (const TrajectoryStateOnSurface tsos, const GlobalPoint &vtx) const
	as above, but from TrajectoryStateOnSurface More...
TrajectoryStateOnSurface	extrapolate (const FreeTrajectoryState &fts, const GlobalPoint &vtx, const Propagator &u) const
	extrapolation with user-supplied propagator More...
TrajectoryStateOnSurface	extrapolate (const TrajectoryStateOnSurface tsos, const GlobalPoint &vtx, const Propagator &u) const
	as above, but from TrajectoryStateOnSurface More...
	TransverseImpactPointExtrapolator ()
	constructor with default geometrical propagator More...
	TransverseImpactPointExtrapolator (const MagneticField *field)
	constructor with default geometrical propagator More...
	TransverseImpactPointExtrapolator (const Propagator &u)
	constructor with user-supplied propagator More...

Private Member Functions
TrajectoryStateOnSurface	doExtrapolation (const TrajectoryStateOnSurface tsos, const GlobalPoint &vtx, const Propagator &u) const
	extrapolation of (multi) TSOS with (internal or user-supplied) propagator More...
TrajectoryStateOnSurface	doExtrapolation (const FreeTrajectoryState &fts, const GlobalPoint &vtx, const Propagator &u) const
	extrapolation of (single) FTS with (internal or user-supplied) propagator More...
ReferenceCountingPointer< Plane >	tipSurface (const GlobalPoint &position, const GlobalVector &momentum, const double &signedTransverseRadius, const GlobalPoint &vtx) const
	computation of the TIP surface More...

Private Attributes
DeepCopyPointerByClone < Propagator >	thePropagator

Detailed Description

Extrapolate to impact point with respect to vtx, i.e. point of closest approach to vtx in 2D. The surface of the returned TrajectoryStateOnSurface is chosen centred on vtx; the axes of the local coordinate system (x_loc, y_loc, z_loc) are z_loc // trajectory direction in transverse plane at impact point; x_loc normal to trajectory and along impact vector (impact point - vtx); y_loc forms a right-handed system with the other axes.

Definition at line 25 of file TransverseImpactPointExtrapolator.h.

Constructor & Destructor Documentation

TransverseImpactPointExtrapolator::TransverseImpactPointExtrapolator

(

)

constructor with default geometrical propagator

Definition at line 15 of file TransverseImpactPointExtrapolator.cc.

TransverseImpactPointExtrapolator::TransverseImpactPointExtrapolator

(

const MagneticField *

field

)

constructor with default geometrical propagator

Definition at line 19 of file TransverseImpactPointExtrapolator.cc.

TransverseImpactPointExtrapolator::TransverseImpactPointExtrapolator

(

const Propagator &

u

)

constructor with user-supplied propagator

Definition at line 22 of file TransverseImpactPointExtrapolator.cc.

Member Function Documentation

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::doExtrapolation ( const TrajectoryStateOnSurface  tsos, const GlobalPoint &  vtx, const Propagator &  u  ) const

private

extrapolation of (multi) TSOS with (internal or user-supplied) propagator

Definition at line 69 of file TransverseImpactPointExtrapolator.cc.

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::doExtrapolation ( const FreeTrajectoryState &  fts, const GlobalPoint &  vtx, const Propagator &  u  ) const

private

extrapolation of (single) FTS with (internal or user-supplied) propagator

Definition at line 104 of file TransverseImpactPointExtrapolator.cc.

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::extrapolate	(	const FreeTrajectoryState &	fts,
		const GlobalPoint &	vtx
	)		const

extrapolation with default (=geometrical) propagator

Definition at line 29 of file TransverseImpactPointExtrapolator.cc.

Referenced by reco::TransientTrackFromFTS::calculateTSOSAtVertex(), reco::GsfTransientTrack::calculateTSOSAtVertex(), MultiRefittedTS::computeFreeTrajectoryState(), GsfConstraintAtVertex::constrainAtPoint(), MultiTrajectoryStateTransform::extrapolatedState(), reco::CandidatePtrTransientTrack::impactPointState(), reco::TrackTransientTrack::impactPointState(), reco::TransientTrackFromFTS::stateOnSurface(), reco::CandidatePtrTransientTrack::stateOnSurface(), reco::TrackTransientTrack::stateOnSurface(), reco::GsfTransientTrack::stateOnSurface(), and IPTools::transverseExtrapolate().

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::extrapolate	(	const TrajectoryStateOnSurface	tsos,
		const GlobalPoint &	vtx
	)		const

as above, but from TrajectoryStateOnSurface

Definition at line 36 of file TransverseImpactPointExtrapolator.cc.

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::extrapolate	(	const FreeTrajectoryState &	fts,
		const GlobalPoint &	vtx,
		const Propagator &	u
	)		const

extrapolation with user-supplied propagator

Definition at line 44 of file TransverseImpactPointExtrapolator.cc.

TrajectoryStateOnSurface TransverseImpactPointExtrapolator::extrapolate	(	const TrajectoryStateOnSurface	tsos,
		const GlobalPoint &	vtx,
		const Propagator &	u
	)		const

as above, but from TrajectoryStateOnSurface

Definition at line 56 of file TransverseImpactPointExtrapolator.cc.

ReferenceCountingPointer< Plane > TransverseImpactPointExtrapolator::tipSurface ( const GlobalPoint &  position, const GlobalVector &  momentum, const double &  signedTransverseRadius, const GlobalPoint &  vtx  ) const

private

computation of the TIP surface

Definition at line 139 of file TransverseImpactPointExtrapolator.cc.

Member Data Documentation

DeepCopyPointerByClone<Propagator> TransverseImpactPointExtrapolator::thePropagator

private

Definition at line 69 of file TransverseImpactPointExtrapolator.h.