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

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

CovarianceMatrix reco::VertexGhostTrackState::cartesianCovariance ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 23 of file VertexGhostTrackState.h.

References covariance_, vertexStateOnGhostTrack(), and vertexStateOnMeasurement().

{ return covariance_; }

GlobalError reco::VertexGhostTrackState::cartesianError ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 22 of file VertexGhostTrackState.h.

References covariance_.

{ return covariance_; }

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

inlineoverrideprivatevirtual

Implements reco::BasicGhostTrackState.

Definition at line 31 of file VertexGhostTrackState.h.

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

GlobalPoint reco::VertexGhostTrackState::globalPosition ( ) const

inlineoverridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 21 of file VertexGhostTrackState.h.

References position_.

{ return position_; }

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

overridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 38 of file VertexGhostTrackState.cc.

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

Referenced by cartesianCovariance().

{
    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);
}

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

overridevirtual

Implements reco::BasicGhostTrackState.

Definition at line 68 of file VertexGhostTrackState.cc.

Referenced by cartesianCovariance().

{
    return Vertex(position_, covariance_);
}

Member Data Documentation

CovarianceMatrix reco::VertexGhostTrackState::covariance_

private

Definition at line 35 of file VertexGhostTrackState.h.

Referenced by cartesianCovariance(), and cartesianError().

GlobalPoint reco::VertexGhostTrackState::position_

private

Definition at line 34 of file VertexGhostTrackState.h.

Referenced by globalPosition().