reco::SequentialGhostTrackFitter Class Reference

#include <SequentialGhostTrackFitter.h>

Inheritance diagram for reco::SequentialGhostTrackFitter:

Public Member Functions
GhostTrackPrediction	fit (const GhostTrackFitter::PredictionUpdater &updater, const GhostTrackPrediction &prior, std::vector< GhostTrackState > &states, double &ndof, double &chi2)
	SequentialGhostTrackFitter ()
	~SequentialGhostTrackFitter ()
Public Member Functions inherited from reco::GhostTrackFitter::FitterImpl
virtual	~FitterImpl ()

Protected Member Functions
virtual void	postFit (const GhostTrackFitter::PredictionUpdater &updater, const GhostTrackPrediction &pred, std::vector< GhostTrackState > &states)
virtual void	reset ()
virtual bool	stable (const GhostTrackPrediction &before, const GhostTrackPrediction &after) const

Private Member Functions
virtual FitterImpl *	clone () const

Private Attributes
unsigned int	maxIteration
double	minDeltaR
double	minDistance
double	weightThreshold

Detailed Description

Definition at line 13 of file SequentialGhostTrackFitter.h.

Constructor & Destructor Documentation

SequentialGhostTrackFitter::SequentialGhostTrackFitter

(

)

Definition at line 14 of file SequentialGhostTrackFitter.cc.

Referenced by clone().

                                                       :
    maxIteration(15),
    minDeltaR(0.0015),
    minDistance(0.002),
    weightThreshold(0.001)
{
}

reco::SequentialGhostTrackFitter::~SequentialGhostTrackFitter ( )

inline

Definition at line 16 of file SequentialGhostTrackFitter.h.

{}

Member Function Documentation

virtual FitterImpl* reco::SequentialGhostTrackFitter::clone ( void  ) const

inlineprivatevirtual

Implements reco::GhostTrackFitter::FitterImpl.

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 34 of file SequentialGhostTrackFitter.h.

References SequentialGhostTrackFitter().

    { return new SequentialGhostTrackFitter(*this); }

GhostTrackPrediction SequentialGhostTrackFitter::fit ( const GhostTrackFitter::PredictionUpdater &  updater, const GhostTrackPrediction &  prior, std::vector< GhostTrackState > &  states, double &  ndof, double &  chi2  )

virtual

Implements reco::GhostTrackFitter::FitterImpl.

Definition at line 32 of file SequentialGhostTrackFitter.cc.

References i, align_cfg::iteration, reco::GhostTrackState::linearize(), maxIteration, postFit(), bookConverter::prior, reset(), stable(), reco::GhostTrackFitter::PredictionUpdater::update(), and weightThreshold.

Referenced by reco::GhostTrackVertexFinder::refitGhostTrack().

{
    GhostTrackPrediction pred, lastPred = prior;

    reset();

    ndof = 0.;
    chi2 = 0.;

    unsigned int iteration = 0;
    for(;;) {
        pred = prior;

        if (states.begin() == states.end())
            break;

        if (iteration > 0) {
            for(unsigned int i = 0; i < states.size(); i++) {
                GhostTrackState &state = states[i];
                state.linearize(lastPred);
            }
        }

        ndof = 0.; // prior gives us an initial ndof
        chi2 = 0.;

        for(std::vector<GhostTrackState>::const_iterator state = 
            states.begin(); state != states.end(); ++state) {

            if (state->isValid() &&
                state->weight() > weightThreshold)
                pred = updater.update(pred, *state,
                                      ndof, chi2);
        }

        if (++iteration >= maxIteration || stable(lastPred, pred))
            break;

        postFit(updater, pred, states);

        lastPred = pred;
    }

    return pred;
}

virtual void reco::SequentialGhostTrackFitter::postFit ( const GhostTrackFitter::PredictionUpdater &  updater, const GhostTrackPrediction &  pred, std::vector< GhostTrackState > &  states  )

inlineprotectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 28 of file SequentialGhostTrackFitter.h.

Referenced by fit().

                                                {}

virtual void reco::SequentialGhostTrackFitter::reset ( void  )

inlineprotectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 27 of file SequentialGhostTrackFitter.h.

Referenced by fit().

{}

bool SequentialGhostTrackFitter::stable ( const GhostTrackPrediction &  before, const GhostTrackPrediction &  after  ) const

protectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 22 of file SequentialGhostTrackFitter.cc.

References reco::GhostTrackPrediction::eta(), reco::GhostTrackPrediction::ip(), minDeltaR, minDistance, reco::GhostTrackPrediction::phi(), funct::sqr(), and reco::GhostTrackPrediction::sz().

Referenced by fit(), and reco::AnnealingGhostTrackFitter::stable().

{
    return (sqr(after.sz() - before.sz()) +
            sqr(after.ip() - before.ip()) < sqr(minDistance) &&
            sqr(after.eta() - before.eta()) +
            sqr(after.phi() - before.phi()) < sqr(minDeltaR));
}

Member Data Documentation

unsigned int reco::SequentialGhostTrackFitter::maxIteration

private

Definition at line 37 of file SequentialGhostTrackFitter.h.

Referenced by fit().

double reco::SequentialGhostTrackFitter::minDeltaR

private

Definition at line 38 of file SequentialGhostTrackFitter.h.

Referenced by stable().

double reco::SequentialGhostTrackFitter::minDistance

private

Definition at line 39 of file SequentialGhostTrackFitter.h.

Referenced by stable().

double reco::SequentialGhostTrackFitter::weightThreshold

private

Definition at line 40 of file SequentialGhostTrackFitter.h.

Referenced by fit().