VertexExtrapolate Class Reference

#include <VertexExtrapolate.h>

Public Member Functions
	~VertexExtrapolate ()
void	KalFitExt (const HepPoint3D &point, DstMdcKalTrack *kalTrack, const int pid)
const HepVector	getHelixVector () const
const HepSymMatrix	getErrorMatrix () const

Static Public Member Functions
static VertexExtrapolate *	instance ()

Detailed Description

Definition at line 33 of file VertexExtrapolate.h.

Constructor & Destructor Documentation

~VertexExtrapolate()

VertexExtrapolate::~VertexExtrapolate ( )

inline

Definition at line 37 of file VertexExtrapolate.h.

{}

Member Function Documentation

getErrorMatrix()

const HepSymMatrix VertexExtrapolate::getErrorMatrix ( ) const

inline

Definition at line 75 of file VertexExtrapolate.h.

{
    return m_errorMatrix;
}

getHelixVector()

const HepVector VertexExtrapolate::getHelixVector ( ) const

inline

Definition at line 70 of file VertexExtrapolate.h.

{
    return m_helixVector;
}

instance()

VertexExtrapolate * VertexExtrapolate::instance ( )

static

Definition at line 33 of file VertexExtrapolate.cxx.

{
    if (m_instance == nullptr) m_instance = new VertexExtrapolate();
    return m_instance;
}

Referenced by VertexFitRefine::init().

KalFitExt()

void VertexExtrapolate::KalFitExt	(	const HepPoint3D &	point,
		DstMdcKalTrack *	kalTrack,
		const int	pid )

Definition at line 205 of file VertexExtrapolate.cxx.

{
    HepVector tdsHelix     = kalTrack->getFHelix(pid);
    HepSymMatrix tdsMatrix = kalTrack->getFError(pid);
 
    HepPoint3D IP(0., 0., 0.);
    // construct a KalFitTrack
    KalFitTrack fitTrack(IP, tdsHelix, tdsMatrix, pid, 0, 0);
 
    // const double radius = 7.885; // centimeter first MDC wire?
    const double rp = point.perp();
    // const double radius = m_BesKalmanExtWalls[m_BesKalmanExtWalls.size() - 1]
    //                           .radius(); // outer radius
    const double radius = m_BesKalmanExtWalls[0].radius(); // outer radius
    const double dphi   = fitTrack.intersect_cylinder(std::max(rp, radius));
    const HepPoint3D lastPivot = fitTrack.x(dphi);
    fitTrack.pivot(lastPivot);
    if (rp <= radius) extToAnyPoint(fitTrack, point);
 
    ///////// why pivot to IP? ///////
    // // set the pivot back to IP
    fitTrack.pivot(IP); // for convention?
    setHelixVector(fitTrack.a());
    setErrorMatrix(fitTrack.Ea());
}

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The documentation for this class was generated from the following files:

• VertexExtrapolate.h
• VertexExtrapolate.cxx