#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 ()
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 [inline, private, virtual]

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(), evf::utils::state, 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
	)		`[inline, protected, virtual]`

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 28 of file SequentialGhostTrackFitter.h.

Referenced by fit().

{}

virtual void reco::SequentialGhostTrackFitter::reset ( void ) [inline, protected, virtual]

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 `[protected, virtual]`

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().

{
        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));
}