/data/refman/pasoursint/CMSSW_5_3_10/src/RecoBTag/BTagTools/interface/SignedImpactParameter3D.h

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#ifndef _BTAGGER_SIGNEDIMPACTPARAMETER3D_H_
#define _BTAGGER_SIGNEDIMPACTPARAMETER3D_H_
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"
#include <utility>
class SignedImpactParameter3D {

public:

  // construct

  SignedImpactParameter3D(){};

  std::pair<bool,Measurement1D> apply( const reco::TransientTrack &, const GlobalVector & direction, const reco::Vertex & vertex) const;

  int id() const {return 2;}

static  std::pair<double,Measurement1D> distanceWithJetAxis(const reco::TransientTrack & transientTrack, const GlobalVector & direction, const reco::Vertex & vertex)  ;

private:

  static GlobalVector distance(const TrajectoryStateOnSurface &, const reco::Vertex &, const GlobalVector &) ;

  static TrajectoryStateOnSurface closestApproachToJet(const FreeTrajectoryState &, const reco::Vertex &, const GlobalVector &,  const MagneticField *) ;

};

#endif