reco::VertexGhostTrackState Class Reference

#include <VertexGhostTrackState.h>

Inheritance diagram for reco::VertexGhostTrackState:

Public Member Functions
CovarianceMatrix	cartesianCovariance () const override
GlobalError	cartesianError () const override
GlobalPoint	globalPosition () const override
	VertexGhostTrackState (const GlobalPoint &pos, const CovarianceMatrix &cov)
Vertex	vertexStateOnGhostTrack (const GhostTrackPrediction &pred, bool withMeasurementError) const override
Vertex	vertexStateOnMeasurement (const GhostTrackPrediction &pred, bool withGhostTrackError) const override
Public Member Functions inherited from reco::BasicGhostTrackState
virtual bool	isValid () const
double	lambda () const
virtual bool	linearize (const GhostTrackPrediction &pred, bool initial, double lambda)
virtual bool	linearize (const GhostTrackPrediction &pred, double lambda)
virtual void	reset ()
void	setWeight (double weight)
double	weight () const
virtual	~BasicGhostTrackState ()

Private Member Functions
pointer	clone () const override

Private Attributes
CovarianceMatrix	covariance_
GlobalPoint	position_

Additional Inherited Members
Public Types inherited from reco::BasicGhostTrackState
using	BGTS = BasicGhostTrackState
typedef math::Error< 3 >::type	CovarianceMatrix
using	pointer = Proxy::pointer
using	Proxy = ProxyBase11< BGTS >
typedef std::pair< GlobalPoint, GlobalError >	Vertex
Static Public Member Functions inherited from reco::BasicGhostTrackState
template<typename T , typename... Args>
static std::shared_ptr< BGTS >	build (Args &&... args)
Protected Attributes inherited from reco::BasicGhostTrackState
double	lambda_ = 0
double	weight_ = 1.

Detailed Description

Definition at line 15 of file VertexGhostTrackState.h.

Constructor & Destructor Documentation

VertexGhostTrackState()

reco::VertexGhostTrackState::VertexGhostTrackState ( const GlobalPoint &  pos, const CovarianceMatrix &  cov  )

inline

Definition at line 17 of file VertexGhostTrackState.h.

: position_(pos), covariance_(cov) {}

Member Function Documentation

cartesianCovariance()

CovarianceMatrix reco::VertexGhostTrackState::cartesianCovariance ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 21 of file VertexGhostTrackState.h.

{ return covariance_; }

References covariance_.

cartesianError()

GlobalError reco::VertexGhostTrackState::cartesianError ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 20 of file VertexGhostTrackState.h.

{ return covariance_; }

References covariance_.

clone()

pointer reco::VertexGhostTrackState::clone ( void  ) const

inlineoverrideprivatevirtual

Implements reco::BasicGhostTrackState.

Definition at line 27 of file VertexGhostTrackState.h.

{ return build<VertexGhostTrackState>(*this); }

globalPosition()

GlobalPoint reco::VertexGhostTrackState::globalPosition ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 19 of file VertexGhostTrackState.h.

{ return position_; }

References position_.

vertexStateOnGhostTrack()

BasicGhostTrackState::Vertex VertexGhostTrackState::vertexStateOnGhostTrack ( const GhostTrackPrediction &  pred, bool  withMeasurementError  ) const

overridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 37 of file VertexGhostTrackState.cc.

                                                                                                             {
  using namespace ROOT::Math;
 
  GlobalPoint origin = pred.origin();
  GlobalVector direction = pred.direction();
 
  double rho2 = pred.rho2();
  double rho = std::sqrt(rho2);
  double lambda = (position_ - origin) * direction / rho2;
  GlobalPoint pos = origin + lambda * direction;
 
  Vector3 b = conv(direction) / rho;
  Vector3 ca = conv(position_ - pos);
 
  Matrix33 pA = TensorProd(b, b);
  Matrix33 pB = TensorProd(b, ca);
 
  Matrix36 jacobian;
  jacobian.Place_at(-pA + Matrix33(SMatrixIdentity()), 0, 0);
  jacobian.Place_at(pB / rho, 0, 3);
  Matrix3S error = Similarity(jacobian, pred.cartesianError(lambda));
 
  if (withMeasurementError)
    error += Similarity(pA, covariance_);
 
  return Vertex(pos, error);
}

References b, reco::GhostTrackPrediction::cartesianError(), conv, covariance_, reco::GhostTrackPrediction::direction(), relativeConstraints::error, reco::BasicGhostTrackState::lambda(), reco::GhostTrackPrediction::origin(), position_, reco::GhostTrackPrediction::rho2(), and mathSSE::sqrt().

vertexStateOnMeasurement()

BasicGhostTrackState::Vertex VertexGhostTrackState::vertexStateOnMeasurement ( const GhostTrackPrediction &  pred, bool  withGhostTrackError  ) const

overridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 66 of file VertexGhostTrackState.cc.

                                                                                                             {
  return Vertex(position_, covariance_);
}

References covariance_, and position_.

Member Data Documentation

covariance_

CovarianceMatrix reco::VertexGhostTrackState::covariance_

private

Definition at line 30 of file VertexGhostTrackState.h.

Referenced by cartesianCovariance(), cartesianError(), vertexStateOnGhostTrack(), and vertexStateOnMeasurement().

position_

GlobalPoint reco::VertexGhostTrackState::position_

private

Definition at line 29 of file VertexGhostTrackState.h.

Referenced by globalPosition(), vertexStateOnGhostTrack(), and vertexStateOnMeasurement().