//-*- Mode: C++ -*-
  // *****************************************************************************
  //                                                                             *
  // @Autors: I.Kulakov; M.Zyzak; I.Kisel                                        *
  // @e-mail: I.Kulakov@gsi.de; M.Zyzak@gsi.de; I.Kisel@compeng.uni-frankfurt.de *
  //                                                                             *
  // *****************************************************************************

#ifndef PNDCATARGET_H
#define PNDCATARGET_H


#include "PndCATrackParam.h"
#include "PndCAFieldValue.h"

class PndCATarget {
 public:
  PndCATarget():fX0(0), fX1(0), fX2(0), fDX1(-1), fDX2(-1), fDQMom(-1), fB(), fNDF(-1) {};
  PndCATarget( float x0, float x1, float x2, float dx1, float dx2, float dqmom, PndCAFieldValue b, int ndf ):fX0(x0), fX1(x1), fX2(x2), fDX1(dx1), fDX2(dx2), fDQMom(dqmom), fB(b), fNDF(ndf) {};

  float SetErrQMom( float v ) { return fDQMom = v; }
  
  float X0() const { return fX0; }
  float X1() const { return fX1; }
  float X2() const { return fX2; }

  float Err2X1() const { return fDX1*fDX1; }
  float Err2X2() const { return fDX2*fDX2; }
  float Err2QMom() const { return fDQMom*fDQMom; }
  float DQMom() const { return fDQMom*fDQMom; }
  const PndCAFieldValue& B() const { return fB; }
  int NDF() const { return fNDF; }
  
 private:
  float fX0, fX1, fX2, fDX1, fDX2, fDQMom;
  PndCAFieldValue fB;
  int fNDF; // 0 or 2, depends whether we consider target as a measurement
};

#endif