#ifndef HPARTICLEVERTEXFIND_H
#define HPARTICLEVERTEXFIND_H

#include "hreconstructor.h"
#include "hgeomvector.h"
#include "hgeomvertexfit.h"
#include "hspecgeompar.h"
#include "TIterator.h"
#include "TNtuple.h"
#include "TFile.h"
#include "TClonesArray.h"

class HCategory;
class HMdcGeomPar;
class HIterator;
class HParticleCand;

class HParticleVertexFind : public HReconstructor {
public:
  HParticleVertexFind(const Text_t name[] = "",const Text_t title[] = "",Bool_t tukey = kFALSE);
  virtual ~HParticleVertexFind(void);
  Bool_t      init(void);
  Bool_t      finalize(void);
  Int_t       execute(void);
  void        setCut(Double_t minz=-100,Double_t maxz=50,Double_t maxr=50) { fminZ = minz; fmaxZ = maxz; fmaxR = maxr;}
  void        useTukeyWeights        (Bool_t flag) { fUsingTukey    = flag; }
  void        setTukeyConstant       (Double_t d)  { fTukeyConst    = d; }
  void        setMaxIterations       (Int_t max)   { fMaxIterations = max; }
  void        setEpsilon             (Double_t ep) { fEpsilon       = ep; }
  Double_t    getTukeyConstant       (void) { return fTukeyConst; }
  Int_t       getMaxIterations       (void) { return fMaxIterations; }
  Double_t    getEpsilon             (void) { return fEpsilon; }
protected:
  void        initVars(void);
  Bool_t      pointsToTarget(const HGeomVector &r,HGeomVector &alpha,Int_t sector,Int_t module);
  Bool_t      readInput     (HGeomVector &estimate);
  void        transform     (HParticleCand *data, HGeomVector &r, HGeomVector &alpha);
  Bool_t      hasConverged  (HGeomVector &v,HGeomVector &oldV);

  HGeomVertexFit fFitter;              //!
  TClonesArray   fPos;                 //! r for each track
  TClonesArray   fAlpha;               //! alpha vector for each track
  HCategory      *fInput;              //! Geant MDC data
  HMdcGeomPar    *fGeometry;           //! Geometry transformation
  HSpecGeomPar   *fSpecGeometry;       //! Spectrometer's geometry
  Double_t       fTukeyConst;          // Value used as Tukey constant
  Int_t          fMaxIterations;       // Maximum number of iterations
  Bool_t         fUsingTukey;          // Flag turning on and off Tukey weights
  Double_t       fEpsilon;             // Used for convergence criterium
  Double_t       fminZ;                //! minz range for segments
  Double_t       fmaxZ;                //! maxz range for segments
  Double_t       fmaxR;                //! maxr range for segments
public:
 
  ClassDef(HParticleVertexFind,1)
};

#endif