/data/refman/pasoursint/CMSSW_5_3_3/src/RecoMuon/TrackingTools/interface/MuonErrorMatrix.h

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#ifndef MUONERRORMATRIX_H
#define MUONERRORMATRIX_H

#include <TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h>
#include <TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h>
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include <TFile.h>
#include <TProfile3D.h>
#include <TString.h>
#include <TAxis.h>


class MuonErrorMatrix{
 public:
  enum action { use , constructor};
  MuonErrorMatrix(const edm::ParameterSet & pset);
  
  ~MuonErrorMatrix();

  void close();
  
  CurvilinearTrajectoryError get(GlobalVector momentum,bool convolute=true);
  CurvilinearTrajectoryError getFast(GlobalVector momentum);

  static  void multiply(CurvilinearTrajectoryError & initial_error, const CurvilinearTrajectoryError & scale_error);

  static  bool divide(CurvilinearTrajectoryError & num_error, const CurvilinearTrajectoryError & denom_error);

  inline TProfile3D * get(int i , int j) {return Index(i,j);}
  inline unsigned int index(int i, int j){return Pindex(i,j);}

  static const TString vars[5];

  static double Term(const AlgebraicSymMatrix55 & curv, int i, int j);

  int findBin(TAxis * axis, double value);

  void simpleTerm(const AlgebraicSymMatrix55 & input, AlgebraicSymMatrix55 & output);
  
  void complicatedTerm(const AlgebraicSymMatrix55 & input, AlgebraicSymMatrix55 & output);

  void adjust(FreeTrajectoryState & state);

  void adjust(TrajectoryStateOnSurface & state);

 private:
  std::string theCategory;

  TDirectory * theD;
  TProfile3D * theData[15];
  TProfile3D * theData_fast[5][5];

  enum TermAction  { error, scale, assign };
  TermAction theTermAction[15];  

  inline int Pindex(int i , int j) {
    static const int offset[5]={0,5,5+4,5+4+3,5+4+3+2};
    return offset[i]+abs(j-i);}
  inline TProfile3D * Index(int i , int j) {
    return theData[Pindex(i,j)];}


  double Value(GlobalVector & momentum, int i, int j,bool convolute=true);
  double Rms(GlobalVector & momentum, int i, int j);
  

};



#endif