[u/mrichter/AliRoot.git] / ITS / AliITStrackerV2.h

#ifndef ALIITSTRACKERV2_H
#define ALIITSTRACKERV2_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

//-------------------------------------------------------------------------
//                          ITS tracker
//     reads AliITSclusterV2 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"

class AliITSclusterV2;
class AliESD;
class AliITSgeom;
class TTree;


//-------------------------------------------------------------------------
class AliITStrackerV2 : public AliTracker {
public:
  AliITStrackerV2():AliTracker(){}
  AliITStrackerV2(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;

  class AliITSdetector { 
  public:
    AliITSdetector(){}
    AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
    Double_t GetR()   const {return fR;}
    Double_t GetPhi() const {return fPhi;}
  private:
    Double_t fR;    // polar coordinates 
    Double_t fPhi;  // of this detector
  };

  class AliITSlayer {
    friend class AliITStrackerV2;
  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 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;}
    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;}
  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
    Float_t  fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster
    Double_t fZmax;      //    edges
    Double_t fYmin;      //   of  the
    Double_t fYmax;      //   "window"
    Int_t fI;            // index of the current cluster within the "window"
    Double_t fRoad;      // road defined by the cluster density
    Int_t FindClusterIndex(Double_t z) const;
  };
  
protected:
  void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
  Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
  void  FollowProlongation();
  Int_t TakeNextProlongation();
  void ResetBestTrack() {
     fBestTrack.~AliITStrackV2();
     new(&fBestTrack) AliITStrackV2(fTrackToFollow);
  }
  void ResetTrackToFollow(const AliITStrackV2 &t) {
     fTrackToFollow.~AliITStrackV2();
     new(&fTrackToFollow) AliITStrackV2(t);
  }
  Float_t    *GetWeight(Int_t index);
  void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
  void SortTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel);
  void CompressTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel, Int_t maxsize);
  AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original, Int_t checkmax); 
  AliITStrackV2 * GetBestHypothesysMIP(Int_t esdindex, AliITStrackV2 * original); 
  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         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
  ClassDef(AliITStrackerV2,1)   //ITS tracker V2
};


inline void AliITStrackerV2::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 AliITStrackerV2::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 AliITStrackerV2::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);      
   }
}

#endif
Commit	Line	Data
18856a77	1	#ifndef ALIITSTRACKERV2_H
18856a77	2	#define ALIITSTRACKERV2_H
006b5f7f	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
18856a77	8	// reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks
18856a77	9	// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
006b5f7f	10	//-------------------------------------------------------------------------
64ea0cbc	11
	12	#include <TObjArray.h>
	13
006b5f7f	14	#include "AliTracker.h"
	15	#include "AliITSrecoV2.h"
	16	#include "AliITStrackV2.h"
	17
	18	class AliITSclusterV2;
c630aafd	19	class AliESD;
006b5f7f	20	class AliITSgeom;
c630aafd	21	class TTree;
006b5f7f	22
	23
	24	//-------------------------------------------------------------------------
	25	class AliITStrackerV2 : public AliTracker {
	26	public:
	27	AliITStrackerV2():AliTracker(){}
c630aafd	28	AliITStrackerV2(const AliITSgeom *geom);
006b5f7f	29	AliCluster *GetCluster(Int_t index) const;
235b705f	30	AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
	31	{return fgLayers[layn].GetCluster(ncl);}
	32	Int_t GetNumberOfClustersLayer(Int_t layn) const
	33	{return fgLayers[layn].GetNumberOfClusters();}
c630aafd	34	Int_t LoadClusters(TTree *cf);
61ab8ea8	35	void UnloadClusters();
c630aafd	36	Int_t Clusters2Tracks(TTree in, TTree out);
c630aafd	37	Int_t Clusters2Tracks(AliESD *event);
c630aafd	38	Int_t PropagateBack(AliESD *event);
c630aafd	39	Int_t RefitInward(AliESD *event);
c630aafd	40	Bool_t RefitAt(Double_t x, AliITStrackV2 seed, const AliITStrackV2 t);
7f6ddf58	41	void SetupFirstPass(Int_t flags, Double_t cuts=0);
	42	void SetupSecondPass(Int_t flags, Double_t cuts=0);
	43
c0dd5278	44	void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
	45	void SetLayersNotToSkip(Int_t *l);
	46
b87bd7cd	47	void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
b87bd7cd	48
babd135a	49	class AliITSdetector {
7f6ddf58	50	public:
	51	AliITSdetector(){}
	52	AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
7f6ddf58	53	Double_t GetR() const {return fR;}
	54	Double_t GetPhi() const {return fPhi;}
	55	private:
	56	Double_t fR; // polar coordinates
	57	Double_t fPhi; // of this detector
	58	};
	59
	60	class AliITSlayer {
babd135a	61	friend class AliITStrackerV2;
7f6ddf58	62	public:
	63	AliITSlayer();
	64	AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
	65	~AliITSlayer();
	66	Int_t InsertCluster(AliITSclusterV2 *c);
61ab8ea8	67	void ResetClusters();
babd135a	68	void ResetWeights();
7f6ddf58	69	void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
7f6ddf58	70	const AliITSclusterV2 *GetNextCluster(Int_t &ci);
b87bd7cd	71	void ResetRoad();
b87bd7cd	72	Double_t GetRoad() const {return fRoad;}
7f6ddf58	73	Double_t GetR() const {return fR;}
de5d3595	74	AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
babd135a	75	Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
7f6ddf58	76	AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
7f6ddf58	77	Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
61ab8ea8	78	Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
7f6ddf58	79	Int_t InRoad() const ;
7f6ddf58	80	Int_t GetNumberOfClusters() const {return fN;}
61ab8ea8	81	Int_t GetNladders() const {return fNladders;}
61ab8ea8	82	Int_t GetNdetectors() const {return fNdetectors;}
235b705f	83	protected:
7f6ddf58	84	Double_t fR; // mean radius of this layer
	85	Double_t fPhiOffset; // offset of the first detector in Phi
	86	Int_t fNladders; // number of ladders
	87	Double_t fZOffset; // offset of the first detector in Z
	88	Int_t fNdetectors; // detectors/ladder
	89	AliITSdetector *fDetectors; // array of detectors
	90	Int_t fN; // number of clusters
	91	AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
babd135a	92	Float_t fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster
7f6ddf58	93	Double_t fZmax; // edges
	94	Double_t fYmin; // of the
	95	Double_t fYmax; // "window"
	96	Int_t fI; // index of the current cluster within the "window"
b87bd7cd	97	Double_t fRoad; // road defined by the cluster density
7f6ddf58	98	Int_t FindClusterIndex(Double_t z) const;
7f6ddf58	99	};
de5d3595	100
235b705f	101	protected:
7f6ddf58	102	void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
a9a2d814	103	Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
006b5f7f	104	void FollowProlongation();
006b5f7f	105	Int_t TakeNextProlongation();
006b5f7f	106	void ResetBestTrack() {
	107	fBestTrack.~AliITStrackV2();
	108	new(&fBestTrack) AliITStrackV2(fTrackToFollow);
	109	}
006b5f7f	110	void ResetTrackToFollow(const AliITStrackV2 &t) {
	111	fTrackToFollow.~AliITStrackV2();
	112	new(&fTrackToFollow) AliITStrackV2(t);
	113	}
babd135a	114	Float_t *GetWeight(Int_t index);
de5d3595	115	void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
babd135a	116	void SortTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel);
	117	void CompressTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel, Int_t maxsize);
	118	AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original, Int_t checkmax);
	119	AliITStrackV2 * GetBestHypothesysMIP(Int_t esdindex, AliITStrackV2 * original);
7f6ddf58	120	Int_t fI; // index of the current layer
18856a77	121	static AliITSlayer fgLayers[kMaxLayer];// ITS layers
7f6ddf58	122	AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
	123	AliITStrackV2 fBestTrack; // "best" track
	124	AliITStrackV2 fTrackToFollow; // followed track
de5d3595	125	TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
de5d3595	126	Int_t fCurrentEsdTrack; // ! current esd track - MI
7f6ddf58	127	Int_t fPass; // current pass through the data
7f6ddf58	128	Int_t fConstraint[2]; // constraint flags
8676d691	129
c0dd5278	130	Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
c0dd5278	131	Int_t fLastLayerToTrackTo; // the innermost layer to track to
c630aafd	132	ClassDef(AliITStrackerV2,1) //ITS tracker V2
006b5f7f	133	};
	134
	135
7f6ddf58	136	inline void AliITStrackerV2::SetupFirstPass(Int_t flags, Double_t cuts) {
	137	// This function sets up flags and cuts for the first tracking pass
	138	//
	139	// flags[0] - vertex constaint flag
	140	// negative means "skip the pass"
	141	// 0 means "no constraint"
	142	// positive means "normal constraint"
	143
	144	fConstraint[0]=flags[0];
	145	if (cuts==0) return;
	146	}
	147
	148	inline void AliITStrackerV2::SetupSecondPass(Int_t flags, Double_t cuts) {
	149	// This function sets up flags and cuts for the second tracking pass
	150	//
	151	// flags[0] - vertex constaint flag
	152	// negative means "skip the pass"
	153	// 0 means "no constraint"
	154	// positive means "normal constraint"
	155
	156	fConstraint[1]=flags[0];
	157	if (cuts==0) return;
	158	}
	159
	160	inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
	161	//--------------------------------------------------------------------
	162	//This function "cooks" a track label. If label<0, this track is fake.
	163	//--------------------------------------------------------------------
	164	Int_t tpcLabel=t->GetLabel();
	165	if (tpcLabel<0) return;
	166	AliTracker::CookLabel(t,wrong);
babd135a	167	if (tpcLabel!=TMath::Abs(t->GetLabel())){
	168	t->SetFakeRatio(1.);
	169	}
	170	if (tpcLabel !=t->GetLabel()) {
	171	t->SetLabel(-tpcLabel);
	172	}
7f6ddf58	173	}
006b5f7f	174
006b5f7f	175	#endif