/data/refman/pasoursint/CMSSW_4_4_5_patch3/src/RecoVertex/VertexTools/interface/VertexDistanceXY.h

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#ifndef Vertex_VertexDistanceXY_H
#define Vertex_VertexDistanceXY_H

#include "RecoVertex/VertexTools/interface/VertexDistance.h"

class VertexDistanceXY : public VertexDistance {

public:

  VertexDistanceXY()  {}

  virtual Measurement1D signedDistance(const reco::Vertex &primVtx , 
                                 const reco::Vertex &secVtx,
                                 const GlobalVector & momentum) const;

  virtual VertexDistanceXY * clone() const
  {
    return new VertexDistanceXY(*this);
  }


  using VertexDistance::distance;
  using VertexDistance::compatibility;

private:

  AlgebraicSymMatrix22 theNullMatrix;

  virtual Measurement1D distance(const GlobalPoint & vtx1Position, 
                                 const GlobalError & vtx1PositionError, 
                                 const GlobalPoint & vtx2Position, 
                                 const GlobalError & vtx2PositionError) const;

  virtual float compatibility(const GlobalPoint & vtx1Position, 
                              const GlobalError & vtx1PositionError, 
                              const GlobalPoint & vtx2Position, 
                              const GlobalError & vtx2PositionError) const;
};


#endif