[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.h

#ifndef ALIITSTRACKERMI_H
#define ALIITSTRACKERMI_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

//-------------------------------------------------------------------------
//                          ITS tracker
//     reads AliITSclusterMI clusters and creates AliITStrackV2 tracks
//           Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch 
//-------------------------------------------------------------------------

#include <TObjArray.h>

#include "AliTracker.h"
#include "AliITSrecoV2.h"
#include "AliITStrackV2.h"
#include "AliITSclusterV2.h"

class AliITSclusterV2;
class AliESD;
class AliITSgeom;
class TTree;
class AliHelix;
class AliV0vertex;


class AliITSRecV0Info: public TObject {
public:
  void Update(Float_t vertex[3], Float_t mass1, Float_t mass2);
  Double_t       fDist1;    //info about closest distance according closest MC - linear DCA
  Double_t       fDist2;    //info about closest distance parabolic DCA
  Double_t       fInvMass;  //reconstructed invariant mass -
  //
  Double_t       fPdr[3];    //momentum at vertex daughter  - according approx at DCA
  Double_t       fXr[3];     //rec. position according helix
  //
  Double_t       fPm[3];    //momentum at the vertex mother
  Double_t       fAngle[3]; //three angles
  Double_t       fRr;       // rec position of the vertex 
  Int_t          fLab[2];   //MC label of the partecle 
  Float_t        fPointAngleFi; //point angle fi
  Float_t        fPointAngleTh; //point angle theta
  Float_t        fPointAngle;   //point angle full
  ClassDef(AliITSRecV0Info,1)  // container for  
};


//-------------------------------------------------------------------------
class AliITStrackerMI : public AliTracker {
public:
  AliITStrackerMI():AliTracker(){}
  AliITStrackerMI(const AliITSgeom *geom);
  AliCluster *GetCluster(Int_t index) const;
  AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
                        {return fgLayers[layn].GetCluster(ncl);}
  Int_t GetNumberOfClustersLayer(Int_t layn) const 
                        {return fgLayers[layn].GetNumberOfClusters();}
  Int_t LoadClusters(TTree *cf);
  void UnloadClusters();
  Int_t Clusters2Tracks(TTree *in, TTree *out);
  Int_t Clusters2Tracks(AliESD *event);
  Int_t PropagateBack(AliESD *event);
  Int_t RefitInward(AliESD *event);
  Bool_t RefitAt(Double_t x, AliITStrackV2 *seed, const AliITStrackV2 *t);
  void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
  void SetupSecondPass(Int_t *flags, Double_t *cuts=0);

  void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;} 
  void SetLayersNotToSkip(Int_t *l);
  void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
  void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
  Int_t  GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz);
  Double_t GetPredictedChi2MI(AliITStrackV2* track, const AliITSclusterV2 *cluster,Int_t layer);
  Int_t UpdateMI(AliITStrackV2* track, const AliITSclusterV2* cl,Double_t chi2,Int_t layer);
  class AliITSdetector { 
  public:
    AliITSdetector(){}
    AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi; fSinPhi = TMath::Sin(phi); fCosPhi = TMath::Cos(phi);
    fYmin=10000;fYmax=-1000; fZmin=10000;fZmax=-1000;}
    inline void GetGlobalXYZ( const AliITSclusterV2 *cl, Double_t xyz[3]) const;
    Double_t GetR()   const {return fR;}
    Double_t GetPhi() const {return fPhi;}
    Double_t GetYmin() const {return fYmin;}
    Double_t GetYmax() const {return fYmax;}
    Double_t GetZmin() const {return fZmin;}
    Double_t GetZmax() const {return fZmax;}
    void SetYmin(Double_t min) {fYmin = min;}
    void SetYmax(Double_t max) {fYmax = max;}
    void SetZmin(Double_t min) {fZmin = min;}
    void SetZmax(Double_t max) {fZmax = max;}
  private:
    Double_t fR;    // polar coordinates 
    Double_t fPhi;  // of this detector
    Double_t fSinPhi; // sin of phi;
    Double_t fCosPhi; // cos of phi 
    Double_t fYmin;   //  local y minimal
    Double_t fYmax;   //  local max y
    Double_t fZmin;   //  local z min
    Double_t fZmax;   //  local z max
  };

  class AliITSlayer {
    friend class AliITStrackerMI;
  public:
    AliITSlayer();
    AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
   ~AliITSlayer();
    Int_t InsertCluster(AliITSclusterV2 *c);
    void  SortClusters();
    void ResetClusters();
    void ResetWeights();
    void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
    const AliITSclusterV2 *GetNextCluster(Int_t &ci);
    void ResetRoad();
    Double_t GetRoad() const {return fRoad;}
    Double_t GetR() const {return fR;}
    Int_t FindClusterIndex(Float_t z) const;
    AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;} 
    Float_t         *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
    AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
    Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
    Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
    Int_t InRoad() const ;
    Int_t GetNumberOfClusters() const {return fN;}
    Int_t GetNladders() const {return fNladders;}
    Int_t GetNdetectors() const {return fNdetectors;}
    Int_t GetSkip() const {return fSkip;}
    void  SetSkip(Int_t skip){fSkip=skip;}
    void IncAccepted(){fAccepted++;}
    Int_t GetAccepted() const {return fAccepted;}
  protected:
    Double_t fR;                // mean radius of this layer
    Double_t fPhiOffset;        // offset of the first detector in Phi
    Int_t fNladders;            // number of ladders
    Double_t fZOffset;          // offset of the first detector in Z
    Int_t fNdetectors;          // detectors/ladder
    AliITSdetector *fDetectors; // array of detectors
    Int_t fN;                   // number of clusters
    AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
    Int_t        fClusterIndex[kMaxClusterPerLayer]; // pointers to clusters
    Float_t fY[kMaxClusterPerLayer];                // y position of the clusters      
    Float_t fZ[kMaxClusterPerLayer];                // z position of the clusters      
    Float_t fYB[2];                                       // ymin and ymax
    //
    AliITSclusterV2 *fClusters5[6][kMaxClusterPerLayer5]; // pointers to clusters -     slice in y
    Int_t        fClusterIndex5[6][kMaxClusterPerLayer5]; // pointers to clusters -     slice in y    
    Float_t fY5[6][kMaxClusterPerLayer5];                // y position of the clusters  slice in y    
    Float_t fZ5[6][kMaxClusterPerLayer5];                // z position of the clusters  slice in y 
    Int_t fN5[6];                                       // number of cluster in slice
    Float_t fDy5;                                       //delta y
    Float_t fBy5[6][2];                                    //slice borders
    //
    AliITSclusterV2 *fClusters10[11][kMaxClusterPerLayer10]; // pointers to clusters -     slice in y
    Int_t        fClusterIndex10[11][kMaxClusterPerLayer10]; // pointers to clusters -     slice in y    
    Float_t fY10[11][kMaxClusterPerLayer10];                // y position of the clusters  slice in y    
    Float_t fZ10[11][kMaxClusterPerLayer10];                // z position of the clusters  slice in y 
    Int_t fN10[11];                                       // number of cluster in slice
    Float_t fDy10;
    Float_t fBy10[11][2];                  
    //
    AliITSclusterV2 *fClusters20[21][kMaxClusterPerLayer20]; // pointers to clusters -     slice in y
    Int_t        fClusterIndex20[21][kMaxClusterPerLayer20]; // pointers to clusters -     slice in y    
    Float_t fY20[21][kMaxClusterPerLayer20];                // y position of the clusters  slice in y    
    Float_t fZ20[21][kMaxClusterPerLayer20];                // z position of the clusters  slice in y 
    Int_t fN20[21];                                       // number of cluster in slice
    Float_t fDy20;
    Float_t fBy20[21][2];
    //
    AliITSclusterV2** fClustersCs;                         //clusters table in current slice
    Int_t   *fClusterIndexCs;                             //cluster index in current slice 
    Float_t *fYcs;                                        //y position in current slice
    Float_t *fZcs;                                        //z position in current slice
    Int_t    fNcs;                                        //number of clusters in current slice    
    Int_t fCurrentSlice;                                  //current slice
    //
    Float_t  fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster
    Int_t    fClusterTracks[4][kMaxClusterPerLayer]; //tracks registered to given cluster
    Float_t fZmax;      //    edges
    Float_t fYmin;      //   of  the
    Float_t fYmax;      //   "window"
    Int_t fI;            // index of the current cluster within the "window"
    Int_t fImax;            // index of the last cluster within the "window"    
    Int_t fSkip;     // indicates possibility to skip cluster
    Int_t fAccepted;
    Double_t fRoad;      // road defined by the cluster density
  };
  AliITStrackerMI::AliITSlayer    & GetLayer(Int_t layer) const;
  AliITStrackerMI::AliITSdetector & GetDetector(Int_t layer, Int_t n) const {return GetLayer(layer).GetDetector(n); }

protected:
  void FindV0(AliESD *event);  //try to find V0
  Double_t  TestV0(AliHelix *h1, AliHelix *h2, AliITSRecV0Info *vertex);  //try to find V0 - return DCA
  Double_t  FindBestPair(Int_t esdtrack0, Int_t esdtrack1,AliITSRecV0Info *vertex);  // try to find best pair from the tree of track hyp.
  void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
  void CookLabel(AliITStrackV2 *t,Float_t wrong) const;
  Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
  void FollowProlongationTree(AliITStrackV2 * otrack, Int_t esdindex);
  void ResetBestTrack() {
     fBestTrack.~AliITStrackV2();
     new(&fBestTrack) AliITStrackV2(fTrackToFollow);
  }
  void ResetTrackToFollow(const AliITStrackV2 &t) {
     fTrackToFollow.~AliITStrackV2();
     new(&fTrackToFollow) AliITStrackV2(t);
  }
  void CookdEdx(AliITStrackV2* track);
  Double_t GetNormalizedChi2(AliITStrackV2 * track, Int_t mode);
  Double_t GetTruncatedChi2(AliITStrackV2 * track, Float_t fac);
  Double_t NormalizedChi2(AliITStrackV2 * track, Int_t layer);
  Double_t GetInterpolatedChi2(AliITStrackV2 * forwardtrack, AliITStrackV2 * backtrack);  
  Double_t GetMatchingChi2(AliITStrackV2 * track1, AliITStrackV2 * track2);
  Double_t GetDeadZoneProbability(Double_t zpos, Double_t zerr);

  Float_t    *GetWeight(Int_t index);
  void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
  void SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode);
  AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original, Int_t checkmax); 
  void  GetBestHypothesysMIP(TObjArray &itsTracks); 
  void RegisterClusterTracks(AliITStrackV2* track, Int_t id);
  void UnRegisterClusterTracks(AliITStrackV2* track, Int_t id);
  Float_t GetNumberOfSharedClusters(AliITStrackV2* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6]);
  Int_t GetOverlapTrack(AliITStrackV2 *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6], Int_t overlist[6]);
  AliITStrackV2 * GetBest2Tracks(Int_t trackID1, Int_t treackID2, Float_t th0, Float_t th1);
  Float_t  * GetErrY(Int_t trackindex) const {return &fCoeficients[trackindex*48];}
  Float_t  * GetErrZ(Int_t trackindex) const {return &fCoeficients[trackindex*48+12];}
  Float_t  * GetNy(Int_t trackindex) const {return &fCoeficients[trackindex*48+24];}
  Float_t  * GetNz(Int_t trackindex) const {return &fCoeficients[trackindex*48+36];}
  void       SignDeltas( TObjArray *ClusterArray, Float_t zv);
  void MakeCoeficients(Int_t ntracks);
  void UpdateESDtrack(AliITStrackV2* track, ULong_t flags);
  Int_t fI;                              // index of the current layer
  static AliITSlayer fgLayers[kMaxLayer];// ITS layers
  AliITStrackV2 fTracks[kMaxLayer];      // track estimations at the ITS layers
  AliITStrackV2 fBestTrack;              // "best" track 
  AliITStrackV2 fTrackToFollow;          // followed track
  TObjArray     fTrackHypothesys;        // ! array with track hypothesys- ARRAY is the owner of tracks- MI
  Int_t         fBestTrackIndex[100000]; // ! index of the best track
  Int_t         fCurrentEsdTrack;        // ! current esd track           - MI
  Int_t fPass;                           // current pass through the data 
  Int_t fConstraint[2];                  // constraint flags

  Int_t fLayersNotToSkip[kMaxLayer];     // layer masks
  Int_t fLastLayerToTrackTo;             // the innermost layer to track to
  Float_t * fCoeficients;                //! working array with errors and mean cluser shape
  ClassDef(AliITStrackerMI,1)   //ITS tracker V2
};


/////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////


inline void AliITStrackerMI::SetupFirstPass(Int_t *flags, Double_t *cuts) {
  // This function sets up flags and cuts for the first tracking pass   
  //
  //   flags[0] - vertex constaint flag                                
  //              negative means "skip the pass"                        
  //              0        means "no constraint"                        
  //              positive means "normal constraint"                    

   fConstraint[0]=flags[0];
   if (cuts==0) return;
}

inline void AliITStrackerMI::SetupSecondPass(Int_t *flags, Double_t *cuts) {
  // This function sets up flags and cuts for the second tracking pass   
  //
  //   flags[0] - vertex constaint flag                                
  //              negative means "skip the pass"                        
  //              0        means "no constraint"                        
  //              positive means "normal constraint"                    

   fConstraint[1]=flags[0];
   if (cuts==0) return;
}

inline void AliITStrackerMI::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
  //--------------------------------------------------------------------
  //This function "cooks" a track label. If label<0, this track is fake.
  //--------------------------------------------------------------------
   Int_t tpcLabel=t->GetLabel();
   if (tpcLabel<0) return;
   AliTracker::CookLabel(t,wrong);
   if (tpcLabel!=TMath::Abs(t->GetLabel())){
     t->SetFakeRatio(1.);
   }
   if (tpcLabel !=t->GetLabel()) {
     t->SetLabel(-tpcLabel);      
   }
}

inline Double_t AliITStrackerMI::NormalizedChi2(AliITStrackV2 * track, Int_t layer)
{
  //--------------------------------------------------------------------
  //get normalize chi2
  //--------------------------------------------------------------------
  track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->GetChi2()/
  //track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->fChi22/
    TMath::Max(double(track->GetNumberOfClusters()-track->fNSkipped),
	       1./(1.+track->fNSkipped));
  return track->fNormChi2[layer];
}
inline void  AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSclusterV2 *cl, Double_t xyz[3]) const
{
  //
  // get cluster coordinates in global cooordinate 
  //
  xyz[2] = cl->GetZ();
  xyz[0] = fR*fCosPhi - cl->GetY()*fSinPhi;
  xyz[1] = fR*fSinPhi + cl->GetY()*fCosPhi;
}
#endif
Commit	Line	Data
e43c066c	1	#ifndef ALIITSTRACKERMI_H
	2	#define ALIITSTRACKERMI_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	//-------------------------------------------------------------------------
	7	// ITS tracker
	8	// reads AliITSclusterMI clusters and creates AliITStrackV2 tracks
	9	// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
	10	//-------------------------------------------------------------------------
	11
	12	#include <TObjArray.h>
	13
	14	#include "AliTracker.h"
	15	#include "AliITSrecoV2.h"
	16	#include "AliITStrackV2.h"
	17	#include "AliITSclusterV2.h"
	18
	19	class AliITSclusterV2;
	20	class AliESD;
	21	class AliITSgeom;
	22	class TTree;
	23	class AliHelix;
	24	class AliV0vertex;
	25
	26
	27
	28	class AliITSRecV0Info: public TObject {
	29	public:
	30	void Update(Float_t vertex[3], Float_t mass1, Float_t mass2);
	31	Double_t fDist1; //info about closest distance according closest MC - linear DCA
	32	Double_t fDist2; //info about closest distance parabolic DCA
	33	Double_t fInvMass; //reconstructed invariant mass -
	34	//
	35	Double_t fPdr[3]; //momentum at vertex daughter - according approx at DCA
	36	Double_t fXr[3]; //rec. position according helix
	37	//
	38	Double_t fPm[3]; //momentum at the vertex mother
	39	Double_t fAngle[3]; //three angles
	40	Double_t fRr; // rec position of the vertex
	41	Int_t fLab[2]; //MC label of the partecle
	42	Float_t fPointAngleFi; //point angle fi
	43	Float_t fPointAngleTh; //point angle theta
	44	Float_t fPointAngle; //point angle full
	45	ClassDef(AliITSRecV0Info,1) // container for
	46	};
	47
	48
	49
	50
	51	//-------------------------------------------------------------------------
	52	class AliITStrackerMI : public AliTracker {
	53	public:
	54	AliITStrackerMI():AliTracker(){}
	55	AliITStrackerMI(const AliITSgeom *geom);
	56	AliCluster *GetCluster(Int_t index) const;
	57	AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
	58	{return fgLayers[layn].GetCluster(ncl);}
	59	Int_t GetNumberOfClustersLayer(Int_t layn) const
	60	{return fgLayers[layn].GetNumberOfClusters();}
	61	Int_t LoadClusters(TTree *cf);
	62	void UnloadClusters();
	63	Int_t Clusters2Tracks(TTree in, TTree out);
	64	Int_t Clusters2Tracks(AliESD *event);
65	Int_t PropagateBack(AliESD *event);
66	Int_t RefitInward(AliESD *event);
67	Bool_t RefitAt(Double_t x, AliITStrackV2 seed, const AliITStrackV2 t);
68	void SetupFirstPass(Int_t flags, Double_t cuts=0);
69	void SetupSecondPass(Int_t flags, Double_t cuts=0);
70
71	void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
72	void SetLayersNotToSkip(Int_t *l);
73	void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
74	void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
75	Int_t GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz);
76	Double_t GetPredictedChi2MI(AliITStrackV2* track, const AliITSclusterV2 *cluster,Int_t layer);
77	Int_t UpdateMI(AliITStrackV2* track, const AliITSclusterV2* cl,Double_t chi2,Int_t layer);
78	class AliITSdetector {
79	public:
80	AliITSdetector(){}
81	AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi; fSinPhi = TMath::Sin(phi); fCosPhi = TMath::Cos(phi);
82	fYmin=10000;fYmax=-1000; fZmin=10000;fZmax=-1000;}
83	inline void GetGlobalXYZ( const AliITSclusterV2 *cl, Double_t xyz[3]) const;
84	Double_t GetR() const {return fR;}
85	Double_t GetPhi() const {return fPhi;}
86	Double_t GetYmin() const {return fYmin;}
87	Double_t GetYmax() const {return fYmax;}
88	Double_t GetZmin() const {return fZmin;}
89	Double_t GetZmax() const {return fZmax;}
90	void SetYmin(Double_t min) {fYmin = min;}
91	void SetYmax(Double_t max) {fYmax = max;}
92	void SetZmin(Double_t min) {fZmin = min;}
93	void SetZmax(Double_t max) {fZmax = max;}
94	private:
95	Double_t fR; // polar coordinates
96	Double_t fPhi; // of this detector
97	Double_t fSinPhi; // sin of phi;
98	Double_t fCosPhi; // cos of phi
99	Double_t fYmin; // local y minimal
100	Double_t fYmax; // local max y
101	Double_t fZmin; // local z min
102	Double_t fZmax; // local z max
103	};
104
105	class AliITSlayer {
106	friend class AliITStrackerMI;
107	public:
108	AliITSlayer();
109	AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
110	~AliITSlayer();
111	Int_t InsertCluster(AliITSclusterV2 *c);
112	void SortClusters();
113	void ResetClusters();
114	void ResetWeights();
115	void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
116	const AliITSclusterV2 *GetNextCluster(Int_t &ci);
117	void ResetRoad();
118	Double_t GetRoad() const {return fRoad;}
119	Double_t GetR() const {return fR;}
120	Int_t FindClusterIndex(Float_t z) const;
121	AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
122	Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
123	AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
124	Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
125	Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
126	Int_t InRoad() const ;
127	Int_t GetNumberOfClusters() const {return fN;}
128	Int_t GetNladders() const {return fNladders;}
129	Int_t GetNdetectors() const {return fNdetectors;}
130	Int_t GetSkip() const {return fSkip;}
131	void SetSkip(Int_t skip){fSkip=skip;}
132	void IncAccepted(){fAccepted++;}
133	Int_t GetAccepted() const {return fAccepted;}
134	protected:
135	Double_t fR; // mean radius of this layer
136	Double_t fPhiOffset; // offset of the first detector in Phi
137	Int_t fNladders; // number of ladders
138	Double_t fZOffset; // offset of the first detector in Z
139	Int_t fNdetectors; // detectors/ladder
140	AliITSdetector *fDetectors; // array of detectors
141	Int_t fN; // number of clusters
142	AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
143	Int_t fClusterIndex[kMaxClusterPerLayer]; // pointers to clusters
144	Float_t fY[kMaxClusterPerLayer]; // y position of the clusters
145	Float_t fZ[kMaxClusterPerLayer]; // z position of the clusters
146	Float_t fYB[2]; // ymin and ymax
147	//
148	AliITSclusterV2 *fClusters5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y
149	Int_t fClusterIndex5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y
150	Float_t fY5[6][kMaxClusterPerLayer5]; // y position of the clusters slice in y
151	Float_t fZ5[6][kMaxClusterPerLayer5]; // z position of the clusters slice in y
152	Int_t fN5[6]; // number of cluster in slice
153	Float_t fDy5; //delta y
154	Float_t fBy5[6][2]; //slice borders
155	//
156	AliITSclusterV2 *fClusters10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y
157	Int_t fClusterIndex10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y
158	Float_t fY10[11][kMaxClusterPerLayer10]; // y position of the clusters slice in y
159	Float_t fZ10[11][kMaxClusterPerLayer10]; // z position of the clusters slice in y
160	Int_t fN10[11]; // number of cluster in slice
161	Float_t fDy10;
162	Float_t fBy10[11][2];
163	//
164	AliITSclusterV2 *fClusters20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y
165	Int_t fClusterIndex20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y
166	Float_t fY20[21][kMaxClusterPerLayer20]; // y position of the clusters slice in y
167	Float_t fZ20[21][kMaxClusterPerLayer20]; // z position of the clusters slice in y
168	Int_t fN20[21]; // number of cluster in slice
169	Float_t fDy20;
170	Float_t fBy20[21][2];
171	//
172	AliITSclusterV2** fClustersCs; //clusters table in current slice
173	Int_t *fClusterIndexCs; //cluster index in current slice
174	Float_t *fYcs; //y position in current slice
175	Float_t *fZcs; //z position in current slice
176	Int_t fNcs; //number of clusters in current slice
177	Int_t fCurrentSlice; //current slice
178	//
179	Float_t fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster
180	Int_t fClusterTracks[4][kMaxClusterPerLayer]; //tracks registered to given cluster
181	Float_t fZmax; // edges
182	Float_t fYmin; // of the
183	Float_t fYmax; // "window"
184	Int_t fI; // index of the current cluster within the "window"
185	Int_t fImax; // index of the last cluster within the "window"
186	Int_t fSkip; // indicates possibility to skip cluster
187	Int_t fAccepted;
188	Double_t fRoad; // road defined by the cluster density
189	};
190	AliITStrackerMI::AliITSlayer & GetLayer(Int_t layer) const;
191	AliITStrackerMI::AliITSdetector & GetDetector(Int_t layer, Int_t n) const {return GetLayer(layer).GetDetector(n); }
192
193	protected:
194	void FindV0(AliESD *event); //try to find V0
195	Double_t TestV0(AliHelix h1, AliHelix h2, AliITSRecV0Info *vertex); //try to find V0 - return DCA
196	Double_t FindBestPair(Int_t esdtrack0, Int_t esdtrack1,AliITSRecV0Info *vertex); // try to find best pair from the tree of track hyp.
197	void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
198	void CookLabel(AliITStrackV2 *t,Float_t wrong) const;
199	Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
200	void FollowProlongationTree(AliITStrackV2 * otrack, Int_t esdindex);
201	void ResetBestTrack() {
202	fBestTrack.~AliITStrackV2();
203	new(&fBestTrack) AliITStrackV2(fTrackToFollow);
204	}
205	void ResetTrackToFollow(const AliITStrackV2 &t) {
206	fTrackToFollow.~AliITStrackV2();
207	new(&fTrackToFollow) AliITStrackV2(t);
208	}
209	void CookdEdx(AliITStrackV2* track);
210	Double_t GetNormalizedChi2(AliITStrackV2 * track, Int_t mode);
211	Double_t GetTruncatedChi2(AliITStrackV2 * track, Float_t fac);
212	Double_t NormalizedChi2(AliITStrackV2 * track, Int_t layer);
213	Double_t GetInterpolatedChi2(AliITStrackV2 * forwardtrack, AliITStrackV2 * backtrack);
214	Double_t GetMatchingChi2(AliITStrackV2 * track1, AliITStrackV2 * track2);
215	Double_t GetDeadZoneProbability(Double_t zpos, Double_t zerr);
216
217	Float_t *GetWeight(Int_t index);
218	void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
219	void SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode);
220	AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original, Int_t checkmax);
221	void GetBestHypothesysMIP(TObjArray &itsTracks);
222	void RegisterClusterTracks(AliITStrackV2* track, Int_t id);
223	void UnRegisterClusterTracks(AliITStrackV2* track, Int_t id);
224	Float_t GetNumberOfSharedClusters(AliITStrackV2* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6]);
225	Int_t GetOverlapTrack(AliITStrackV2 *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6], Int_t overlist[6]);
226	AliITStrackV2 * GetBest2Tracks(Int_t trackID1, Int_t treackID2, Float_t th0, Float_t th1);
227	Float_t * GetErrY(Int_t trackindex) const {return &fCoeficients[trackindex*48];}
228	Float_t * GetErrZ(Int_t trackindex) const {return &fCoeficients[trackindex*48+12];}
229	Float_t * GetNy(Int_t trackindex) const {return &fCoeficients[trackindex*48+24];}
230	Float_t * GetNz(Int_t trackindex) const {return &fCoeficients[trackindex*48+36];}
231	void SignDeltas( TObjArray *ClusterArray, Float_t zv);
232	void MakeCoeficients(Int_t ntracks);
233	void UpdateESDtrack(AliITStrackV2* track, ULong_t flags);
234	Int_t fI; // index of the current layer
235	static AliITSlayer fgLayers[kMaxLayer];// ITS layers
236	AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
237	AliITStrackV2 fBestTrack; // "best" track
238	AliITStrackV2 fTrackToFollow; // followed track
239	TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
240	Int_t fBestTrackIndex[100000]; // ! index of the best track
241	Int_t fCurrentEsdTrack; // ! current esd track - MI
242	Int_t fPass; // current pass through the data
243	Int_t fConstraint[2]; // constraint flags
244
245	Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
246	Int_t fLastLayerToTrackTo; // the innermost layer to track to
247	Float_t * fCoeficients; //! working array with errors and mean cluser shape
248	ClassDef(AliITStrackerMI,1) //ITS tracker V2
249	};
250
251
252
253
254	/////////////////////////////////////////////////////////
255	/////////////////////////////////////////////////////////
256	/////////////////////////////////////////////////////////
257
258
259
260
261
262	inline void AliITStrackerMI::SetupFirstPass(Int_t flags, Double_t cuts) {
263	// This function sets up flags and cuts for the first tracking pass
264	//
265	// flags[0] - vertex constaint flag
266	// negative means "skip the pass"
267	// 0 means "no constraint"
268	// positive means "normal constraint"
269
270	fConstraint[0]=flags[0];
271	if (cuts==0) return;
272	}
273
274	inline void AliITStrackerMI::SetupSecondPass(Int_t flags, Double_t cuts) {
275	// This function sets up flags and cuts for the second tracking pass
276	//
277	// flags[0] - vertex constaint flag
278	// negative means "skip the pass"
279	// 0 means "no constraint"
280	// positive means "normal constraint"
281
282	fConstraint[1]=flags[0];
283	if (cuts==0) return;
284	}
285
286	inline void AliITStrackerMI::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
287	//--------------------------------------------------------------------
288	//This function "cooks" a track label. If label<0, this track is fake.
289	//--------------------------------------------------------------------
290	Int_t tpcLabel=t->GetLabel();
291	if (tpcLabel<0) return;
292	AliTracker::CookLabel(t,wrong);
293	if (tpcLabel!=TMath::Abs(t->GetLabel())){
294	t->SetFakeRatio(1.);
295	}
296	if (tpcLabel !=t->GetLabel()) {
297	t->SetLabel(-tpcLabel);
298	}
299	}
300
301	inline Double_t AliITStrackerMI::NormalizedChi2(AliITStrackV2 * track, Int_t layer)
302	{
303	//--------------------------------------------------------------------
304	//get normalize chi2
305	//--------------------------------------------------------------------
306	track->fNormChi2[layer] = 2.track->fNSkipped+0.25track->fNDeadZone+track->fdEdxMismatch+track->GetChi2()/
307	//track->fNormChi2[layer] = 2.track->fNSkipped+0.25track->fNDeadZone+track->fdEdxMismatch+track->fChi22/
308	TMath::Max(double(track->GetNumberOfClusters()-track->fNSkipped),
309	1./(1.+track->fNSkipped));
310	return track->fNormChi2[layer];
311	}
312	inline void AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSclusterV2 *cl, Double_t xyz[3]) const
313	{
314	//
315	// get cluster coordinates in global cooordinate
316	//
317	xyz[2] = cl->GetZ();
318	xyz[0] = fRfCosPhi - cl->GetY()fSinPhi;
319	xyz[1] = fRfSinPhi + cl->GetY()fCosPhi;
320	}
321	#endif