[u/mrichter/AliRoot.git] / TRD / AliTRDtrackerV1.h

#ifndef ALITRDTRACKERV1_H
#define ALITRDTRACKERV1_H

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

/* $Id$ */

////////////////////////////////////////////////////////////////////////////
//                                                                        //
//  The TRD tracker                                                       //
//                                                                        //
//  Authors:                                                              //
//    Marian Ivanov <M.Ivanov@gsi.de>                                     //
//    Alex Bercuci <A.Bercuci@gsi.de>                                     //
//    Jouri Belikov <J.Belikov@cern.ch>                                   //
//    Markus Fasel <M.Fasel@gsi.de>                                       //
//                                                                        //
////////////////////////////////////////////////////////////////////////////

#ifndef ALITRACKER_H
#include "AliTracker.h"
#endif

#ifndef ALITRDTRACKINGSECTOR_H
#include "AliTRDtrackingSector.h"
#endif

/**************************************************************************
 * Class Status see source file                                           *
 **************************************************************************/
 
class TFile;
class TTreeSRedirector;
class TClonesArray;
class TLinearFitter;

class AliRieman;
class AliESDEvent;
class AliCluster;

class AliTRDcluster;
class AliTRDseedV1;
class AliTRDtrackingChamber;
class AliTRDchamberTimeBin;
class AliTRDtrackerFitter;
class AliTRDtrackV1;
class AliTrackPoint;
class AliTRDtrackerV1 : public AliTracker
{
public:
	enum{
		kMaxLayersPerSector   = 1000
		, kMaxTimeBinIndex    = 216
		, kTrackingSectors    = 18
		, kNTimeBins          = 35
		, kNPlanes            = 6
		, kNSeedPlanes        = 4
		, kMaxTracksStack     = 100
		, kNConfigs           = 15
	};
	AliTRDtrackerV1();
	virtual ~AliTRDtrackerV1();
  
  //temporary
  AliTRDtrackingSector* GetTrackingSector(Int_t sec) {return &fTrSec[sec];}
  
	Int_t          Clusters2Tracks(AliESDEvent *esd);
  static TTreeSRedirector* DebugStreamer() {return fgDebugStreamer;}
  AliCluster*    GetCluster(Int_t index) const;
	static void    GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]);
	static const Int_t   GetNTimeBins() {return fgNTimeBins;}
	static void    GetSeedingConfig(Int_t iconfig, Int_t planes[4]);
	static TLinearFitter *GetTiltedRiemanFitter();
	static TLinearFitter *GetTiltedRiemanFitterConstraint();
	static AliRieman *GetRiemanFitter();
	static void    FitRieman(AliTRDcluster **clusters, Double_t chi2[2]);
	static Float_t FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes = 0x0);
	static Float_t FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex);
	static Float_t FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError);
	
	Int_t          FollowBackProlongation(AliTRDtrackV1 &t);
	Int_t          FollowProlongation(AliTRDtrackV1 &t);
  Int_t          LoadClusters(TTree *cTree);
	Int_t          PropagateBack(AliESDEvent *event);
  Int_t          ReadClusters(TClonesArray* &array, TTree *in) const;
	Int_t          RefitInward(AliESDEvent *event);
	void           UnloadClusters();
  
  static Int_t   Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down); // to be removed 
  static void    FitLeastSquare(Int_t nPoints, Float_t *x, Float_t *y, Float_t *errors, Float_t *fitparams);

protected:
  Bool_t         AdjustSector(AliTRDtrackV1 *track); 
	Double_t       BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs);
	static Float_t CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref);
	Int_t          Clusters2TracksSM(Int_t sector, AliESDEvent *esd);
	Int_t          Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList);
	AliTRDseedV1*  GetTracklet(AliTRDtrackV1 *trk, Int_t plane, Int_t &idx);
	Bool_t         GetTrackPoint(Int_t index, AliTrackPoint &p) const;	
	Int_t          MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar);
	AliTRDtrackV1* MakeTrack(AliTRDseedV1 *seeds, Double_t *params);
  Int_t          PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep);
	Int_t          SetTracklet(AliTRDseedV1 *tracklet);

private:
	AliTRDtrackerV1(const AliTRDtrackerV1 &tracker);
	AliTRDtrackerV1 &operator=(const AliTRDtrackerV1 &tracker);
	Double_t       	CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4], Double_t *chi2);
	Double_t       	CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2);
	Int_t          	ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *tracklet);
	static Float_t	CalculateReferenceX(AliTRDseedV1 *tracklets);
	
	Float_t     GetChi2Y(AliTRDseedV1 *tracklets) const;
	Float_t     GetChi2Z(AliTRDseedV1 *tracklets) const;

private:
  AliTRDgeometry          *fGeom;                          // Pointer to TRD geometry
  AliTRDtrackingSector    fTrSec[kTrackingSectors];       // Array of tracking sectors;    

  TClonesArray        *fClusters;                       // List of clusters
  TClonesArray        *fTracklets;                      // List of tracklets
  TClonesArray        *fTracks;                         // List of tracks
  
  // should go to the recoParam
  static const Double_t    fgkMaxChi2;                     // Max increment in track chi2 
  static const Float_t     fgkMinClustersInTrack;          // Min number of clusters in track
  static const Float_t     fgkLabelFraction;               // Min fraction of same label
  static const Double_t    fgkMaxSnp;                      // Maximal snp for tracking
  static const Double_t    fgkMaxStep;                     // Maximal step for tracking  
	
	// stand alone tracking
	static Double_t      fgTopologicQA[kNConfigs];        //  Topologic quality
	Double_t             fTrackQuality[kMaxTracksStack];  //  Track quality 
	Int_t                fSeedLayer[kMaxTracksStack];     //  Seed layer
	Int_t                fSieveSeeding;                   //! Seeding iterator
	
  static Int_t         fgNTimeBins;                     // Timebins per plane in track prolongation 
	static TLinearFitter *fgTiltedRieman;                 //  Fitter for the tilted Rieman fit without vertex constriant
	static TLinearFitter *fgTiltedRiemanConstrained;      //  Fitter for the tilted Rieman fit with vertex constraint	
	static AliRieman     *fgRieman;                       //  Fitter for the untilted Rieman fit
  
	static TTreeSRedirector *fgDebugStreamer;             //!Debug streamer
	
	ClassDef(AliTRDtrackerV1, 2)                          //  TRD tracker development class

};
#endif
Commit	Line	Data
e4f2f73d	1	#ifndef ALITRDTRACKERV1_H
e4f2f73d	2	#define ALITRDTRACKERV1_H
eb38ed55	3
e4f2f73d	4	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	5	* See cxx source for full Copyright notice */
	6
	7	/* $Id$ */
	8
	9	////////////////////////////////////////////////////////////////////////////
	10	// //
	11	// The TRD tracker //
	12	// //
	13	// Authors: //
eb38ed55	14	// Marian Ivanov <M.Ivanov@gsi.de> //
e4f2f73d	15	// Alex Bercuci <A.Bercuci@gsi.de> //
eb38ed55	16	// Jouri Belikov <J.Belikov@cern.ch> //
e4f2f73d	17	// Markus Fasel <M.Fasel@gsi.de> //
e4f2f73d	18	// //
eb38ed55	19	////////////////////////////////////////////////////////////////////////////
e4f2f73d	20
eb38ed55	21	#ifndef ALITRACKER_H
eb38ed55	22	#include "AliTracker.h"
e4f2f73d	23	#endif
e4f2f73d	24
eb38ed55	25	#ifndef ALITRDTRACKINGSECTOR_H
	26	#include "AliTRDtrackingSector.h"
	27	#endif
e4f2f73d	28
	29	/**************************************************************************
	30	* Class Status see source file *
	31	**************************************************************************/
	32
	33	class TFile;
	34	class TTreeSRedirector;
	35	class TClonesArray;
eb38ed55	36	class TLinearFitter;
e4f2f73d	37
	38	class AliRieman;
	39	class AliESDEvent;
eb38ed55	40	class AliCluster;
e4f2f73d	41
eb38ed55	42	class AliTRDcluster;
e4f2f73d	43	class AliTRDseedV1;
eb38ed55	44	class AliTRDtrackingChamber;
eb38ed55	45	class AliTRDchamberTimeBin;
e4f2f73d	46	class AliTRDtrackerFitter;
0906e73e	47	class AliTRDtrackV1;
0906e73e	48	class AliTrackPoint;
eb38ed55	49	class AliTRDtrackerV1 : public AliTracker
e4f2f73d	50	{
eb38ed55	51	public:
e4f2f73d	52	enum{
eb38ed55	53	kMaxLayersPerSector = 1000
	54	, kMaxTimeBinIndex = 216
	55	, kTrackingSectors = 18
	56	, kNTimeBins = 35
	57	, kNPlanes = 6
	58	, kNSeedPlanes = 4
	59	, kMaxTracksStack = 100
	60	, kNConfigs = 15
e4f2f73d	61	};
eb38ed55	62	AliTRDtrackerV1();
0906e73e	63	virtual ~AliTRDtrackerV1();
e4f2f73d	64
eb38ed55	65	//temporary
	66	AliTRDtrackingSector* GetTrackingSector(Int_t sec) {return &fTrSec[sec];}
	67
e4f2f73d	68	Int_t Clusters2Tracks(AliESDEvent *esd);
eb38ed55	69	static TTreeSRedirector* DebugStreamer() {return fgDebugStreamer;}
eb38ed55	70	AliCluster* GetCluster(Int_t index) const;
0906e73e	71	static void GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]);
2985ffcb	72	static const Int_t GetNTimeBins() {return fgNTimeBins;}
0906e73e	73	static void GetSeedingConfig(Int_t iconfig, Int_t planes[4]);
eb38ed55	74	static TLinearFitter *GetTiltedRiemanFitter();
	75	static TLinearFitter *GetTiltedRiemanFitterConstraint();
	76	static AliRieman *GetRiemanFitter();
	77	static void FitRieman(AliTRDcluster **clusters, Double_t chi2[2]);
	78	static Float_t FitRieman(AliTRDseedV1 tracklets, Double_t chi2, Int_t *planes = 0x0);
	79	static Float_t FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex);
	80	static Float_t FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError);
	81
0906e73e	82	Int_t FollowBackProlongation(AliTRDtrackV1 &t);
0906e73e	83	Int_t FollowProlongation(AliTRDtrackV1 &t);
eb38ed55	84	Int_t LoadClusters(TTree *cTree);
0906e73e	85	Int_t PropagateBack(AliESDEvent *event);
eb38ed55	86	Int_t ReadClusters(TClonesArray* &array, TTree *in) const;
0906e73e	87	Int_t RefitInward(AliESDEvent *event);
0906e73e	88	void UnloadClusters();
eb38ed55	89
eb38ed55	90	static Int_t Freq(Int_t n, const Int_t inlist, Int_t outlist, Bool_t down); // to be removed
47d5d320	91	static void FitLeastSquare(Int_t nPoints, Float_t x, Float_t y, Float_t errors, Float_t fitparams);
fbb2ea06	92
eb38ed55	93	protected:
	94	Bool_t AdjustSector(AliTRDtrackV1 *track);
	95	Double_t BuildSeedingConfigs(AliTRDtrackingChamber *stack, Int_t configs);
bb56afff	96	static Float_t CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref);
eb38ed55	97	Int_t Clusters2TracksSM(Int_t sector, AliESDEvent *esd);
eb38ed55	98	Int_t Clusters2TracksStack(AliTRDtrackingChamber *stack, TClonesArray esdTrackList);
0906e73e	99	AliTRDseedV1* GetTracklet(AliTRDtrackV1 *trk, Int_t plane, Int_t &idx);
eb38ed55	100	Bool_t GetTrackPoint(Int_t index, AliTrackPoint &p) const;
	101	Int_t MakeSeeds(AliTRDtrackingChamber *stack, AliTRDseedV1 sseed, Int_t *ipar);
	102	AliTRDtrackV1* MakeTrack(AliTRDseedV1 seeds, Double_t params);
bccda319	103	Int_t PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep);
0906e73e	104	Int_t SetTracklet(AliTRDseedV1 *tracklet);
e4f2f73d	105
0906e73e	106	private:
e4f2f73d	107	AliTRDtrackerV1(const AliTRDtrackerV1 &tracker);
e4f2f73d	108	AliTRDtrackerV1 &operator=(const AliTRDtrackerV1 &tracker);
bb56afff	109	Double_t CookLikelihood(AliTRDseedV1 cseed, Int_t planes[4], Double_t chi2);
	110	Double_t CalculateTrackLikelihood(AliTRDseedV1 tracklets, Double_t chi2);
	111	Int_t ImproveSeedQuality(AliTRDtrackingChamber *stack, AliTRDseedV1 tracklet);
bb56afff	112	static Float_t CalculateReferenceX(AliTRDseedV1 *tracklets);
	113
	114	Float_t GetChi2Y(AliTRDseedV1 *tracklets) const;
	115	Float_t GetChi2Z(AliTRDseedV1 *tracklets) const;
e4f2f73d	116
0906e73e	117	private:
eb38ed55	118	AliTRDgeometry *fGeom; // Pointer to TRD geometry
eb38ed55	119	AliTRDtrackingSector fTrSec[kTrackingSectors]; // Array of tracking sectors;
e4f2f73d	120
bb56afff	121	TClonesArray *fClusters; // List of clusters
	122	TClonesArray *fTracklets; // List of tracklets
	123	TClonesArray *fTracks; // List of tracks
eb38ed55	124
	125	// should go to the recoParam
	126	static const Double_t fgkMaxChi2; // Max increment in track chi2
	127	static const Float_t fgkMinClustersInTrack; // Min number of clusters in track
	128	static const Float_t fgkLabelFraction; // Min fraction of same label
	129	static const Double_t fgkMaxSnp; // Maximal snp for tracking
	130	static const Double_t fgkMaxStep; // Maximal step for tracking
	131
	132	// stand alone tracking
2985ffcb	133	static Double_t fgTopologicQA[kNConfigs]; // Topologic quality
e4f2f73d	134	Double_t fTrackQuality[kMaxTracksStack]; // Track quality
	135	Int_t fSeedLayer[kMaxTracksStack]; // Seed layer
	136	Int_t fSieveSeeding; //! Seeding iterator
eb38ed55	137
2985ffcb	138	static Int_t fgNTimeBins; // Timebins per plane in track prolongation
	139	static TLinearFitter *fgTiltedRieman; // Fitter for the tilted Rieman fit without vertex constriant
	140	static TLinearFitter *fgTiltedRiemanConstrained; // Fitter for the tilted Rieman fit with vertex constraint
	141	static AliRieman *fgRieman; // Fitter for the untilted Rieman fit
bb56afff	142
	143	static TTreeSRedirector *fgDebugStreamer; //!Debug streamer
	144
eb38ed55	145	ClassDef(AliTRDtrackerV1, 2) // TRD tracker development class
e4f2f73d	146
	147	};
	148	#endif