/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/RecoMuon/GlobalTrackingTools/interface/StateSegmentMatcher.h

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#ifndef RecoMuon_GlobalTrackingTools_StateSegmentMatcher_h
#define RecoMuon_GlobalTrackingTools_StateSegmentMatcher_h

#include "DataFormats/DTRecHit/interface/DTRecSegment4D.h"
#include "RecoMuon/GlobalTrackingTools/interface/ChamberSegmentUtility.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"
#include "DataFormats/GeometrySurface/interface/LocalError.h"
#include "DataFormats/GeometryVector/interface/LocalPoint.h"


class Tsos4D {
 public:

  Tsos4D(TrajectoryStateOnSurface* );

  // Returns the 4d vector
  AlgebraicVector4 paramVector() const;

  // Returns the 4x4 covariance matrix
  AlgebraicSymMatrix44 errorMatrix() const;

 private:
  AlgebraicVector4 tsos_4d;
  AlgebraicSymMatrix44 tsosErr_44;

};



class Tsos2DPhi {
 public:
  // Constructor of the class
  Tsos2DPhi(TrajectoryStateOnSurface* );

  // Returns the 2d vector
  AlgebraicVector2 paramVector() const;

  // Returns the 2x2 covariance matrix
  AlgebraicSymMatrix22 errorMatrix() const;

 private:
  AlgebraicVector2 tsos_2d_phi;
  AlgebraicSymMatrix22 tsosErr_22_phi;
};



class Tsos2DZed {
 public:

  Tsos2DZed(TrajectoryStateOnSurface* );

  // Returns the 2d vector
  AlgebraicVector2 paramVector() const;

  // Returns the 2x2 covariance matrix
  AlgebraicSymMatrix22 errorMatrix() const;

 private:
  AlgebraicVector2 tsos_2d_zed;
  AlgebraicSymMatrix22 tsosErr_22_zed;
};



class StateSegmentMatcher {

 public:
  
  // Perform the matching between a track state and a CSC segment
  StateSegmentMatcher(TrajectoryStateOnSurface*, CSCSegment*, LocalError*);

  // Perform the matching between a track state and a DT segment
  StateSegmentMatcher(TrajectoryStateOnSurface*, DTRecSegment4D*, LocalError*);

  // Returns the estimator value 
  double value();

 private:
  
  AlgebraicVector4 v1, v2;
  AlgebraicSymMatrix44 m1, m2, ape;
  AlgebraicVector2 v1_2d, v2_2d;
  AlgebraicSymMatrix22 m1_2d, m2_2d, ape_2d;
  bool match2D;
  double estValue;

  void setAPE4d(LocalError &apeLoc) {
    ape[0][0] = 0; //sigma (dx/dz) 
    ape[1][1] = 0; //sigma (dy/dz)
    ape[2][2] = apeLoc.xx(); //sigma (x)  
    ape[3][3] = apeLoc.yy(); //sigma (y)
    ape[0][2] = 0; //cov(dx/dz,x) 
    ape[1][3] = 0; //cov(dy/dz,y)
  };

  void setAPE2d(LocalError &apeLoc) {
    ape_2d[0][0] = 0; //sigma (dx/dz)
    ape_2d[1][1] = apeLoc.xx(); //sigma (x)
    ape_2d[0][1] = 0; //cov(dx/dz,x) 
  };
};


#endif