#ifndef TrackAlignment_HH
#define TrackAlignment_HH

// Constants needed for conversion of TDC values
// to space coordinates (and vice versa for MC)

#include <iostream>


class TrackAlignment {

public:
  TrackAlignment(bool desy=true);

  // d is dimension; 0 = x, 1 = y
  // l is layer; 0-3 for DESY, 0-2 for CERN

  // z position of layer
  double zLayer(unsigned d, unsigned l) const;
  void   zLayer(unsigned d, unsigned l, double z);

  // Coordinate when TDC value = 0
  double cTzero(unsigned d, unsigned l) const;
  void   cTzero(unsigned d, unsigned l, double c);

  // Drift velocity
  double vDrift(unsigned d, unsigned l) const;
  void   vDrift(unsigned d, unsigned l, double v);
  
  // Intrinsic coordinate error
  double cError(unsigned d, unsigned l) const;
  void   cError(unsigned d, unsigned l, double e);

  // Intrinsic chamber efficiency
  double cEffic(unsigned d, unsigned l) const;
  void   cEffic(unsigned d, unsigned l, double e);

  // Conversion from TDC value to coordinate
  double coordinate(unsigned d, unsigned l, int t) const;

  // Conversion from coordinate to TDC value (for MC)
  int tdcValue(unsigned d, unsigned l, double c) const;

  std::ostream& print(std::ostream &o) const;


private:

  // Interface for LCGenericT class
  friend class LCTrackPayload<TrackAlignment>

  enum {numberOfInts=0};
  const int* intData() const;
        int* intData();

  enum {numberOfFloats=0};
  const int* floatData() const;
        int* floatData();

  enum {numberOfDoubles=5*2*4};
  const double* doubleData() const;
        double* doubleData();

  // Tracking chamber constants
  double _zLayer[2][4];
  double _cTzero[2][4];
  double _vDrift[2][4];
  double _cError[2][4];
  double _cEffic[2][4];
};

#endif