/data/refman/pasoursint/CMSSW_5_3_3/src/RecoTracker/TrackProducer/interface/TrackingRecHitLessFromGlobalPosition.h

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#ifndef TrackCandidate_TrackingRecHitLessFromGlobalPosition_H
#define TrackCandidate_TrackingRecHitLessFromGlobalPosition_H

#include "DataFormats/TrajectorySeed/interface/PropagationDirection.h"
#include "Geometry/CommonDetUnit/interface/GeomDet.h"
#include <functional>
#include "Geometry/TrackerGeometryBuilder/interface/GeomDetLess.h"
#include "Geometry/CommonDetUnit/interface/TrackingGeometry.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
class TrackingRecHitLessFromGlobalPosition {
public:

  TrackingRecHitLessFromGlobalPosition( const TrackingGeometry * geometry_, PropagationDirection dir = alongMomentum) :
    geometry(geometry_), theDir(dir){  }
  
  
  bool operator()( const TrackingRecHit& a, const TrackingRecHit& b) const {
    if (theDir == alongMomentum) return insideOutLess( a, b);
    else return insideOutLess( b, a);
  }
  
 private:

  bool insideOutLess(  const TrackingRecHit& a, const TrackingRecHit& b) const;
  
  bool barrelForwardLess(  const TrackingRecHit& a, const TrackingRecHit& b) const;
  
  
  const TrackingGeometry * geometry;
  PropagationDirection theDir;
};
#endif