[u/mrichter/AliRoot.git] / EMCAL / AliEMCALTracker.h

//========================================================================  
// Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.  
// See cxx source for full Copyright notice                                
//========================================================================  
//                       
//                       Class AliEMCALTracker 
//                      -----------------------
// Implementation of the track matching method between barrel tracks and
// EMCAL clusters.
// Besides algorithm implementation, some cuts are required to be set
// in order to define, for each track, an acceptance window where clusters
// are searched to find best match (if any).
// The class accepts as input an ESD container, and works directly on it,
// simply setting, for each of its tracks, the fEMCALindex flag, for each
// track which is matched to a cluster.
// In order to use method, one must launch PropagateBack().
//
// ------------------------------------------------------------------------
// author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
//=========================================================================

#ifndef ALIEMCALTRACKER_H
#define ALIEMCALTRACKER_H

#include "AliTracker.h"
#include "TMath.h"
class TList;
class TTree;
class TObjArray;
class AliESDEvent;
class AliESDCaloCluster;
class AliEMCALTrack;
class AliEMCALRecPoint;
class AliEMCALGeometry;

class AliEMCALTracker : public AliTracker 
{
public:

	AliEMCALTracker();
	AliEMCALTracker(const AliEMCALTracker &t);
	AliEMCALTracker& operator=(const AliEMCALTracker &source);
	
	virtual ~AliEMCALTracker() {Clear();}
	
	virtual void        Clear(Option_t *option="ALL");
	virtual Int_t       Clusters2Tracks(AliESDEvent*) {return -1;}
	virtual Int_t       LoadClusters(TTree*);
	        Int_t       LoadClusters(AliESDEvent* esd);
	        Int_t       LoadTracks(AliESDEvent* esd);
	virtual Int_t       PropagateBack(AliESDEvent* esd);
	virtual Int_t       RefitInward(AliESDEvent*) {return -1;}
	virtual void        UnloadClusters();
	virtual AliCluster* GetCluster(Int_t) const {return NULL;};
	TTree*              SearchTrueMatches();
	void                SetCorrection(Double_t rho, Double_t x0) {fRho=rho;fX0=x0;}
	void                SetCutAlpha(Double_t min, Double_t max) {fCutAlphaMin=min;fCutAlphaMax=max;}
	void                SetCutAngle(Double_t value) {fCutAngle=value;}
	void                SetCutX(Double_t value) {fCutX=value;}
	void                SetCutY(Double_t value) {fCutY=value;}
	void                SetCutZ(Double_t value) {fCutZ=value;}
	void                SetGeometry(AliEMCALGeometry *geom) {fGeom=geom;}
	void                SetMaxDistance(Double_t value) {fMaxDist=value;}
	void                SetNumberOfSteps(Int_t n) {fNPropSteps=n;if(!n)SetTrackCorrectionMode("NONE");}
	void                SetTrackCorrectionMode(Option_t *option);
	
	enum {
		kUnmatched = -99999
	};
	
	class  AliEMCALMatchCluster : public TObject
	{
	public:
		AliEMCALMatchCluster(Int_t ID, AliEMCALRecPoint *recPoint);
		AliEMCALMatchCluster(Int_t ID, AliESDCaloCluster *caloCluster);
		virtual ~AliEMCALMatchCluster() { }
		//----------------------------------------------------------------------------
		Int_t     Index() const {return fIndex;}
		Int_t     Label() const {return fLabel;}
		Double_t  X() const {return fX;}
		Double_t  Y() const {return fY;} 
		Double_t  Z() const {return fZ;}
		Double_t   Phi() const {return TMath::ATan2(fY, fX);}
	private:
		Int_t     fIndex;  // index of cluster in its native container (ESD or TClonesArray)
		Int_t     fLabel;  // track label of assigned cluster
		Double_t  fX;      // global X position
		Double_t  fY;      // global Y position
		Double_t  fZ;      // global Z position
	};
	
	class  AliEMCALMatch : public TObject
	{
	public:
		AliEMCALMatch();
		AliEMCALMatch(const AliEMCALMatch& copy);
		virtual ~AliEMCALMatch() { }
		//----------------------------------------------------------------------------
		Bool_t&   CanBeSaved() {return fCanBeSaved;}
		Int_t     Compare(const TObject *obj) const;
		Double_t  GetDistance() const {return fDistance;}
		Double_t  GetPt() const {return fPt;}
		Int_t     GetIndexC() const {return fIndexC;}
		Int_t     GetIndexT() const {return fIndexT;}
		Bool_t    IsSortable() const {return kTRUE;}
		void      SetIndexC(Int_t icl) {fIndexC=icl;}
		void      SetIndexT(Int_t itr) {fIndexT=itr;}
		void      SetDistance(Double_t dist) {fDistance=dist;}
		void      SetPt(Double_t pt) {fPt=pt;}
	private:
		Bool_t     fCanBeSaved;  // when true, this match can be saved, otherwise it will not be
		Int_t      fIndexC;      // cluster index in 'fClusters' array
		Int_t      fIndexT;      // track index in 'fTracks' array
		Double_t   fDistance;    // track - cluster distance
		Double_t   fPt;          // track pt
	};

private:

	Double_t   AngleDiff(Double_t angle1, Double_t angle2);
	Double_t   CheckPair(AliEMCALTrack *tr, AliEMCALMatchCluster *cluster);
	Double_t   CheckPairV2(AliEMCALTrack *tr, AliEMCALMatchCluster *cluster);
	Double_t   CheckPairV3(AliEMCALTrack *tr, AliEMCALMatchCluster *cluster);
	Int_t      CreateMatches();
	Bool_t     PropagateToEMCAL(AliEMCALTrack *tr);
	Int_t      SolveCompetitions();
	
	enum ETrackCorr { 
		kTrackCorrNone  = 0, // do not correct for energy loss
		kTrackCorrMMB   = 1, // use MeanMaterialBudget() function to evaluate correction
		kTrackCorrFixed = 2  // use fixed "X0" and "rho" parameters to correct
	};
	
	Int_t       fNPropSteps;      // number of propagation steps (when correcting). If =0 no correction is done
	ETrackCorr  fTrackCorrMode;   // track correction mode
	
	Double_t    fCutX;		      // cut on X difference
	Double_t    fCutY;		      // cut on Y difference
	Double_t    fCutZ;		      // cut on Z difference
	Double_t    fCutAlphaMin;     // cut on difference between track 'alpha' and phi
	Double_t    fCutAlphaMax;     // cut on difference between track 'alpha' and phi
	Double_t    fCutAngle;        // cut on angle between track projection and cluster
	Double_t    fMaxDist;         // maximum allowed total distance between track proj an cluster
	
	Double_t    fRho;             // energy correction: density
	Double_t    fX0;              // energy correction: radiation length

	TObjArray  *fTracks;          //! collection of tracks
	TObjArray  *fClusters;        //! collection of EMCAL clusters (ESDCaloCluster or EMCALRecPoint)
	TList      *fMatches;         //! collection of matches between tracks and clusters
	
	AliEMCALGeometry *fGeom;      //! EMCAL geometry
	
	ClassDef(AliEMCALTracker, 1)  // EMCAL "tracker"
};

#endif
Commit	Line	Data
fe17d4cb	1	//========================================================================
	2	// Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
	3	// See cxx source for full Copyright notice
	4	//========================================================================
	5	//
	6	// Class AliEMCALTracker
	7	// -----------------------
	8	// Implementation of the track matching method between barrel tracks and
	9	// EMCAL clusters.
	10	// Besides algorithm implementation, some cuts are required to be set
	11	// in order to define, for each track, an acceptance window where clusters
	12	// are searched to find best match (if any).
	13	// The class accepts as input an ESD container, and works directly on it,
	14	// simply setting, for each of its tracks, the fEMCALindex flag, for each
	15	// track which is matched to a cluster.
	16	// In order to use method, one must launch PropagateBack().
	17	//
	18	// ------------------------------------------------------------------------
	19	// author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
	20	//=========================================================================
	21
	22	#ifndef ALIEMCALTRACKER_H
	23	#define ALIEMCALTRACKER_H
	24
	25	#include "AliTracker.h"
6d05130c	26	#include "TMath.h"
fe17d4cb	27	class TList;
c61f0e70	28	class TTree;
fe17d4cb	29	class TObjArray;
af885e0f	30	class AliESDEvent;
fe17d4cb	31	class AliESDCaloCluster;
	32	class AliEMCALTrack;
	33	class AliEMCALRecPoint;
c61f0e70	34	class AliEMCALGeometry;
fe17d4cb	35
	36	class AliEMCALTracker : public AliTracker
	37	{
	38	public:
	39
	40	AliEMCALTracker();
	41	AliEMCALTracker(const AliEMCALTracker &t);
	42	AliEMCALTracker& operator=(const AliEMCALTracker &source);
	43
	44	virtual ~AliEMCALTracker() {Clear();}
	45
	46	virtual void Clear(Option_t *option="ALL");
af885e0f	47	virtual Int_t Clusters2Tracks(AliESDEvent*) {return -1;}
fe17d4cb	48	virtual Int_t LoadClusters(TTree*);
af885e0f	49	Int_t LoadClusters(AliESDEvent* esd);
	50	Int_t LoadTracks(AliESDEvent* esd);
	51	virtual Int_t PropagateBack(AliESDEvent* esd);
	52	virtual Int_t RefitInward(AliESDEvent*) {return -1;}
fe17d4cb	53	virtual void UnloadClusters();
fe17d4cb	54	virtual AliCluster* GetCluster(Int_t) const {return NULL;};
c61f0e70	55	TTree* SearchTrueMatches();
fe17d4cb	56	void SetCorrection(Double_t rho, Double_t x0) {fRho=rho;fX0=x0;}
	57	void SetCutAlpha(Double_t min, Double_t max) {fCutAlphaMin=min;fCutAlphaMax=max;}
	58	void SetCutAngle(Double_t value) {fCutAngle=value;}
	59	void SetCutX(Double_t value) {fCutX=value;}
	60	void SetCutY(Double_t value) {fCutY=value;}
	61	void SetCutZ(Double_t value) {fCutZ=value;}
c61f0e70	62	void SetGeometry(AliEMCALGeometry *geom) {fGeom=geom;}
fe17d4cb	63	void SetMaxDistance(Double_t value) {fMaxDist=value;}
	64	void SetNumberOfSteps(Int_t n) {fNPropSteps=n;if(!n)SetTrackCorrectionMode("NONE");}
	65	void SetTrackCorrectionMode(Option_t *option);
	66
c61f0e70	67	enum {
	68	kUnmatched = -99999
	69	};
	70
fe17d4cb	71	class AliEMCALMatchCluster : public TObject
	72	{
	73	public:
c61f0e70	74	AliEMCALMatchCluster(Int_t ID, AliEMCALRecPoint *recPoint);
	75	AliEMCALMatchCluster(Int_t ID, AliESDCaloCluster *caloCluster);
	76	virtual ~AliEMCALMatchCluster() { }
	77	//----------------------------------------------------------------------------
b9560ae2	78	Int_t Index() const {return fIndex;}
	79	Int_t Label() const {return fLabel;}
	80	Double_t X() const {return fX;}
	81	Double_t Y() const {return fY;}
	82	Double_t Z() const {return fZ;}
	83	Double_t Phi() const {return TMath::ATan2(fY, fX);}
fe17d4cb	84	private:
	85	Int_t fIndex; // index of cluster in its native container (ESD or TClonesArray)
	86	Int_t fLabel; // track label of assigned cluster
	87	Double_t fX; // global X position
	88	Double_t fY; // global Y position
	89	Double_t fZ; // global Z position
	90	};
	91
	92	class AliEMCALMatch : public TObject
	93	{
	94	public:
c61f0e70	95	AliEMCALMatch();
	96	AliEMCALMatch(const AliEMCALMatch& copy);
	97	virtual ~AliEMCALMatch() { }
	98	//----------------------------------------------------------------------------
fe17d4cb	99	Bool_t& CanBeSaved() {return fCanBeSaved;}
fe17d4cb	100	Int_t Compare(const TObject *obj) const;
b9560ae2	101	Double_t GetDistance() const {return fDistance;}
	102	Double_t GetPt() const {return fPt;}
	103	Int_t GetIndexC() const {return fIndexC;}
	104	Int_t GetIndexT() const {return fIndexT;}
fe17d4cb	105	Bool_t IsSortable() const {return kTRUE;}
	106	void SetIndexC(Int_t icl) {fIndexC=icl;}
	107	void SetIndexT(Int_t itr) {fIndexT=itr;}
	108	void SetDistance(Double_t dist) {fDistance=dist;}
c61f0e70	109	void SetPt(Double_t pt) {fPt=pt;}
fe17d4cb	110	private:
	111	Bool_t fCanBeSaved; // when true, this match can be saved, otherwise it will not be
	112	Int_t fIndexC; // cluster index in 'fClusters' array
	113	Int_t fIndexT; // track index in 'fTracks' array
	114	Double_t fDistance; // track - cluster distance
c61f0e70	115	Double_t fPt; // track pt
fe17d4cb	116	};
	117
	118	private:
	119
	120	Double_t AngleDiff(Double_t angle1, Double_t angle2);
	121	Double_t CheckPair(AliEMCALTrack tr, AliEMCALMatchCluster cluster);
	122	Double_t CheckPairV2(AliEMCALTrack tr, AliEMCALMatchCluster cluster);
c61f0e70	123	Double_t CheckPairV3(AliEMCALTrack tr, AliEMCALMatchCluster cluster);
fe17d4cb	124	Int_t CreateMatches();
c61f0e70	125	Bool_t PropagateToEMCAL(AliEMCALTrack *tr);
fe17d4cb	126	Int_t SolveCompetitions();
	127
	128	enum ETrackCorr {
	129	kTrackCorrNone = 0, // do not correct for energy loss
	130	kTrackCorrMMB = 1, // use MeanMaterialBudget() function to evaluate correction
	131	kTrackCorrFixed = 2 // use fixed "X0" and "rho" parameters to correct
	132	};
	133
	134	Int_t fNPropSteps; // number of propagation steps (when correcting). If =0 no correction is done
	135	ETrackCorr fTrackCorrMode; // track correction mode
	136
	137	Double_t fCutX; // cut on X difference
	138	Double_t fCutY; // cut on Y difference
	139	Double_t fCutZ; // cut on Z difference
	140	Double_t fCutAlphaMin; // cut on difference between track 'alpha' and phi
	141	Double_t fCutAlphaMax; // cut on difference between track 'alpha' and phi
	142	Double_t fCutAngle; // cut on angle between track projection and cluster
	143	Double_t fMaxDist; // maximum allowed total distance between track proj an cluster
	144
	145	Double_t fRho; // energy correction: density
	146	Double_t fX0; // energy correction: radiation length
	147
c61f0e70	148	TObjArray *fTracks; //! collection of tracks
fe17d4cb	149	TObjArray *fClusters; //! collection of EMCAL clusters (ESDCaloCluster or EMCALRecPoint)
	150	TList *fMatches; //! collection of matches between tracks and clusters
	151
c61f0e70	152	AliEMCALGeometry *fGeom; //! EMCAL geometry
c61f0e70	153
fe17d4cb	154	ClassDef(AliEMCALTracker, 1) // EMCAL "tracker"
	155	};
	156
	157	#endif