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) override
	SequentialGhostTrackFitter ()
	~SequentialGhostTrackFitter () override
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
FitterImpl *	clone () const override

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::SequentialGhostTrackFitter

(

)

Definition at line 14 of file SequentialGhostTrackFitter.cc.

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

Referenced by clone().

~SequentialGhostTrackFitter()

reco::SequentialGhostTrackFitter::~SequentialGhostTrackFitter ( )

inlineoverride

Definition at line 16 of file SequentialGhostTrackFitter.h.

{}

Member Function Documentation

clone()

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

inlineoverrideprivatevirtual

Implements reco::GhostTrackFitter::FitterImpl.

Definition at line 32 of file SequentialGhostTrackFitter.h.

{ return new SequentialGhostTrackFitter(*this); }

References SequentialGhostTrackFitter().

fit()

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

overridevirtual

Implements reco::GhostTrackFitter::FitterImpl.

Definition at line 22 of file SequentialGhostTrackFitter.cc.

                                                                   {
  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;
}

References hltPixelTracks_cff::chi2, mps_fire::i, align_cfg::iteration, reco::GhostTrackState::linearize(), maxIteration, ndof, postFit(), bookConverter::prior, reset(), stable(), reco::GhostTrackFitter::PredictionUpdater::update(), and weightThreshold.

Referenced by trackingPlots.Iteration::modules(), and reco::GhostTrackVertexFinder::refitGhostTrack().

postFit()

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

inlineprotectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 27 of file SequentialGhostTrackFitter.h.

                                                             {}

Referenced by fit().

reset()

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

inlineprotectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 26 of file SequentialGhostTrackFitter.h.

{}

Referenced by fit().

stable()

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

protectedvirtual

Reimplemented in reco::AnnealingGhostTrackFitter.

Definition at line 17 of file SequentialGhostTrackFitter.cc.

                                                                                                                   {
  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));
}

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

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

Member Data Documentation

maxIteration

unsigned int reco::SequentialGhostTrackFitter::maxIteration

private

Definition at line 34 of file SequentialGhostTrackFitter.h.

Referenced by fit().

minDeltaR

double reco::SequentialGhostTrackFitter::minDeltaR

private

Definition at line 35 of file SequentialGhostTrackFitter.h.

Referenced by stable().

minDistance

double reco::SequentialGhostTrackFitter::minDistance

private

Definition at line 36 of file SequentialGhostTrackFitter.h.

Referenced by stable().

weightThreshold

double reco::SequentialGhostTrackFitter::weightThreshold

private

Definition at line 37 of file SequentialGhostTrackFitter.h.

Referenced by fit().