track finding procedure More...

#include <KLMTrackFinder.h>

Collaboration diagram for KLMTrackFinder:

[legend]

Public Member Functions
	KLMTrackFinder ()
	Default constructor.

	KLMTrackFinder (KLMTrackFitter *fitter)
	The track finder requires a track fitter.

	~KLMTrackFinder ()
	Destructor.

void	registerFitter (KLMTrackFitter *fitter)
	Register a fitter if not constructed with one.

bool	filter (const std::list< KLMHit2d * > &seed, std::list< KLMHit2d * > &hits, std::list< KLMHit2d * > &track, int iSubdetector)
	find associated hits and do fit.

Protected Attributes
KLMTrackFitter *	m_Fitter
	pointer to the fitter

Detailed Description

track finding procedure

Definition at line 25 of file KLMTrackFinder.h.

Constructor & Destructor Documentation

◆ KLMTrackFinder() [1/2]

KLMTrackFinder ( )

Default constructor.

Definition at line 22 of file KLMTrackFinder.cc.

23{

24}

◆ KLMTrackFinder() [2/2]

KLMTrackFinder ( KLMTrackFitter * fitter )

explicit

The track finder requires a track fitter.

Definition at line 26 of file KLMTrackFinder.cc.

                                                     :
  m_Fitter(fitter)
{
}

◆ ~KLMTrackFinder()

~KLMTrackFinder ( )

Destructor.

Definition at line 32 of file KLMTrackFinder.cc.

33{

34}

Member Function Documentation

◆ filter()

bool filter	(	const std::list< KLMHit2d * > &	seed,
		std::list< KLMHit2d * > &	hits,
		std::list< KLMHit2d * > &	track,
		int	iSubdetector )

find associated hits and do fit.

find associated hits and do fit

Definition at line 43 of file KLMTrackFinder.cc.

{
 
  std::list<KLMHit2d*>::iterator i;
 
  track = seed;
 
  if (m_Fitter == 0) {
    B2ERROR("KLMTrackFinder: Fitter not registered");
    return (false);
  }
 
  m_Fitter->fit(track);//fit seed
 
  //TODO: REMOVE ME AFTER TESTING B-KLMTrackFitter
  // Will also need to think about how to generalize this
  for (i = hits.begin(); i != hits.end(); ++i) {
    if ((*i)->getSubdetector() != iSubdetector) //should be removed
      continue;
 
    // Prevent duplicate hits or hits on same layer
    // no duplicate hit is alreday guaranteed and now we allow hits on same layer so the following is commented out
    // bool skip = false;
    // for (j = track.begin(); j != track.end(); ++j) {
    //  if ((*j)->getLayer() == (*i)->getLayer())
    //    skip = true;
    // }
    // if (skip == true)
    //   continue;
 
    if ((*i)->isOnStaTrack() == false) {
      double distance, error, sigma;
      distance = m_Fitter->globalDistanceToHit(*i, error, sigma);
      if (sigma < 5.0 && distance < 60) {
        B2DEBUG(20, "KLMTrackFinder" << " Error: " << error << " Sigma: " << sigma << " Distance: " << distance);
        track.push_back(*i);
      }
    }
  }
 
  if (track.size() < 3)
    return false;
 
  // Fit with new hits
  double chisqr = m_Fitter->fit(track);
  B2DEBUG(20, "KLMTrackFinder:" << "ChiSqr: " << chisqr);
 
  // Do this the hard way to count each layer separately.
  std::list<int> hitLayers;
  for (i = track.begin(); i != track.end(); ++i) {
    hitLayers.push_back((*i)->getLayer());
  }
  hitLayers.sort();
  hitLayers.unique();
 
  int layers = (*(--hitLayers.end()) - * (hitLayers.begin()));
  int noHits = hitLayers.size();
 
  if (noHits >= 4 && double(noHits) / double(layers) >= 0.75) {
    return true;
  } else {
    return false;
  }
}

◆ registerFitter()

void registerFitter ( KLMTrackFitter * fitter )

Register a fitter if not constructed with one.

Definition at line 37 of file KLMTrackFinder.cc.

{
  m_Fitter = fitter;
}

Member Data Documentation

◆ m_Fitter

KLMTrackFitter* m_Fitter

protected

pointer to the fitter

Definition at line 52 of file KLMTrackFinder.h.

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

klm/modules/KLMTracking/include/KLMTrackFinder.h
klm/modules/KLMTracking/src/KLMTrackFinder.cc

Public Member Functions

Protected Attributes