FallbackLinearizationPointFinder.cc
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FallbackLinearizationPointFinder.cc
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	#include "RecoVertex/LinearizationPointFinders/interface/FallbackLinearizationPointFinder.h"
	#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
	#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
	#include "RecoVertex/VertexTools/interface/FsmwModeFinder3d.h"

	FallbackLinearizationPointFinder::FallbackLinearizationPointFinder (
	const ModeFinder3d & m ) : theModeFinder ( m.clone() ) {}

	GlobalPoint FallbackLinearizationPointFinder::getLinearizationPoint(
	const vector<FreeTrajectoryState> & tracks ) const
	{
	return GlobalPoint(0.,0.,0.);
	}

	GlobalPoint FallbackLinearizationPointFinder::getLinearizationPoint(
	const vector<reco::TransientTrack> & tracks ) const
	{
	switch ( tracks.size() )
	{
	case 0:
	return GlobalPoint ( 0.,0.,0. );
	case 1:
	return tracks.begin()->impactPointState().globalPosition();
	default:
	{
	vector < pair < GlobalPoint, float > > wtracks;
	wtracks.reserve ( tracks.size() - 1 );
	for ( vector< reco::TransientTrack >::const_iterator i=tracks.begin();
	i!=tracks.end() ; ++i )
	{
	pair < GlobalPoint, float > tmp (
	i->impactPointState().globalPosition(), 1. );
	wtracks.push_back ( tmp );
	}
	return (*theModeFinder) ( wtracks );
	}
	}
	return GlobalPoint ( 0.,0.,0. );
	}