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

//========================================================================
// Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. 
//                                                                        
// Author: The ALICE Off-line Project.                                    
// Contributors are mentioned in the code where appropriate.              
//                                                                        
// Permission to use, copy, modify and distribute this software and its   
// documentation strictly for non-commercial purposes is hereby granted   
// without fee, provided that the above copyright notice appears in all   
// copies and that both the copyright notice and this permission notice   
// appear in the supporting documentation. The authors make no claims     
// about the suitability of this software for any purpose. It is          
// provided "as is" without express or implied warranty.                  
//======================================================================== 
//                       
//                       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)
// Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch)
//=========================================================================

#include <Riostream.h>
#include <iomanip>

#include <TFile.h>
#include <TTree.h>
#include <TList.h>
#include <TString.h>
#include <TVector3.h>
#include <TClonesArray.h>
#include <TGeoMatrix.h>

#include "AliLog.h"
#include "AliESDEvent.h"
#include "AliESDtrack.h"
#include "AliESDCaloCluster.h"
#include "AliEMCALRecPoint.h"
#include "AliRunLoader.h"
#include "AliEMCALTrack.h"
#include "AliEMCALLoader.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALReconstructor.h"
#include "AliEMCALRecParam.h"
#include "AliCDBEntry.h"
#include "AliCDBManager.h"
#include "AliEMCALReconstructor.h"
#include "AliEMCALRecoUtils.h"

#include "AliEMCALTracker.h"

using std::cerr;
using std::endl;
ClassImp(AliEMCALTracker)

//
//------------------------------------------------------------------------------
//
AliEMCALTracker::AliEMCALTracker() 
: AliTracker(),
  fCutPt(0),
  fCutNITS(0),
  fCutNTPC(50),
  fStep(20),
  fTrackCorrMode(kTrackCorrMMB),
  fClusterWindow(50),
  fCutEta(0.025),
  fCutPhi(0.05),
  fTracks(0),
  fClusters(0),
  fGeom(0)
{
  //
  // Default constructor.
  // Initializes all simple data members to default values,
   // and all collections to NULL.
  // Output file name is set to a default value.
  //
  InitParameters();
}
//
//------------------------------------------------------------------------------
//
AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy) 
  : AliTracker(),
    fCutPt(copy.fCutPt),
    fCutNITS(copy.fCutNITS),
    fCutNTPC(copy.fCutNTPC),
    fStep(copy.fStep),
    fTrackCorrMode(copy.fTrackCorrMode),
    fClusterWindow(copy.fClusterWindow),
    fCutEta(copy.fCutEta),
    fCutPhi(copy.fCutPhi),
    fTracks((TObjArray*)copy.fTracks->Clone()),
    fClusters((TObjArray*)copy.fClusters->Clone()),
    fGeom(copy.fGeom)
{
  //
  // Copy constructor
  // Besides copying all parameters, duplicates all collections.
  //
}
//
//------------------------------------------------------------------------------
//
AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source)
{ // assignment operator; use copy ctor
  if (&source == this) return *this;

  new (this) AliEMCALTracker(source);
  return *this;
}
//
//------------------------------------------------------------------------------
//
void AliEMCALTracker::InitParameters()
{
  //
  // Retrieve initialization parameters
  //
	
  // Check if the instance of AliEMCALRecParam exists, 
  const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();

  if(!recParam){
    AliFatal("Reconstruction parameters for EMCAL not set!");
  }
  else{
 
    fCutEta  =  recParam->GetMthCutEta();
    fCutPhi  =  recParam->GetMthCutPhi();
    fStep    =  recParam->GetExtrapolateStep();
    fCutPt   =  recParam->GetTrkCutPt();
    fCutNITS =  recParam->GetTrkCutNITS();
    fCutNTPC =  recParam->GetTrkCutNTPC();
  }
	
}

//
//------------------------------------------------------------------------------
//
void AliEMCALTracker::Clear(Option_t* option)
{
	//
	// Clearing method
        // Deletes all objects in arrays and the arrays themselves
	//

	TString opt(option);
	Bool_t clearTracks = opt.Contains("TRACKS");
	Bool_t clearClusters = opt.Contains("CLUSTERS");
	if (opt.Contains("ALL")) {
		clearTracks = kTRUE;
		clearClusters = kTRUE;
	}
	
	//fTracks is a collection of esdTrack
	//When clearing this array, the linked objects should not be deleted
	if (fTracks != 0x0 && clearTracks) {
	   fTracks->Clear();
	   delete fTracks;
           fTracks = 0;
	}
	if (fClusters != 0x0 && clearClusters) {
	   fClusters->Delete();
	   delete fClusters;
	   fClusters = 0;
	}
}
//
//------------------------------------------------------------------------------
//
Int_t AliEMCALTracker::LoadClusters(TTree *cTree) 
{
	//
	// Load EMCAL clusters in the form of AliEMCALRecPoint,
	// from simulation temporary files.
	// (When included in reconstruction chain, this method is used automatically)
	//
	
	Clear("CLUSTERS");

	cTree->SetBranchStatus("*",0); //disable all branches
	cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need

	TBranch *branch = cTree->GetBranch("EMCALECARP");
	if (!branch) {
		AliError("Can't get the branch with the EMCAL clusters");
		return 1;
	}
	
	TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
	branch->SetAddress(&clusters);
	
	//cTree->GetEvent(0);
	branch->GetEntry(0);
	Int_t nClusters = (Int_t)clusters->GetEntries();
	if(fClusters) fClusters->Delete();
	else fClusters = new TObjArray(0);
	for (Int_t i = 0; i < nClusters; i++) {
		AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i);
		if (!cluster) continue;
		AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
		fClusters->AddLast(matchCluster);
	}

	branch->SetAddress(0);
        clusters->Delete();
        delete clusters;

	AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries()));

	return 0;
}
//
//------------------------------------------------------------------------------
//
Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd) 
{
  //
  // Load EMCAL clusters in the form of AliESDCaloClusters,
  // from an AliESD object.
  //
  
  // make sure that tracks/clusters collections are empty
  Clear("CLUSTERS");
  fClusters = new TObjArray(0);
  
  Int_t nClusters = esd->GetNumberOfCaloClusters();       		
  for (Int_t i=0; i<nClusters; i++) 
    {
      AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
      if (!cluster || !cluster->IsEMCAL()) continue ; 
      AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
      fClusters->AddLast(matchCluster);
    }
  
  AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
  return 0;
}
//
//------------------------------------------------------------------------------
//
Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
{
  //
  // Load ESD tracks.
  //
	
  Clear("TRACKS");
  fTracks = new TObjArray(0);
	
  Int_t nTracks = esd->GetNumberOfTracks();
  //Bool_t isKink=kFALSE;
  for (Int_t i = 0; i < nTracks; i++) 
    {
      AliESDtrack *esdTrack = esd->GetTrack(i);
      // set by default the value corresponding to "no match"
      esdTrack->SetEMCALcluster(kUnmatched);
      esdTrack->ResetStatus(AliESDtrack::kEMCALmatch);

      //Select good quaulity tracks
      if(esdTrack->Pt()<fCutPt) continue;
      if(esdTrack->GetNcls(1)<fCutNTPC)continue;

      //Loose geometric cut
      Double_t phi = esdTrack->Phi()*TMath::RadToDeg();
      if(TMath::Abs(esdTrack->Eta())>0.8 || phi <= 20 || phi >= 240 ) continue;

      fTracks->AddLast(esdTrack);
    }

      AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
      return 0;
}
//
//------------------------------------------------------------------------------
//
void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
{
  //
  // Set track correction mode
  // gest the choice in string format and converts into 
  // internal enum
  //
  
  TString opt(option);
  opt.ToUpper();
  
  if (!opt.CompareTo("NONE")) 
    {
      fTrackCorrMode = kTrackCorrNone;
    }
  else if (!opt.CompareTo("MMB")) 
    {
      fTrackCorrMode = kTrackCorrMMB;
    }
  else 
    {
      cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
    }
}
//
//------------------------------------------------------------------------------
//
Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
{
	//
	// Main operation method.
	// Gets external AliESD containing tracks to be matched.
	// After executing match finding, stores in the same ESD object all infos
	// and releases the object for further reconstruction steps.
	//
        //
        // Note: should always return 0=OK, because otherwise all tracking
        // is aborted for this event
  
	if (!esd) {
		AliError("NULL ESD passed");
		return 1;
	}
	
	// step 1: collect clusters
	Int_t okLoadClusters, nClusters;
	if (!fClusters || (fClusters && fClusters->IsEmpty())) {
		okLoadClusters = LoadClusters(esd);
	}
	nClusters = fClusters->GetEntries();
		
	// step 2: collect ESD tracks
	Int_t nTracks, okLoadTracks;
	okLoadTracks = LoadTracks(esd);
	nTracks = fTracks->GetEntries();
	
	// step 3: for each track, find the closest cluster as matched within residual cuts
	Int_t index=-1;
	for (Int_t it = 0; it < nTracks; it++) 
	  {
	    AliESDtrack *track = (AliESDtrack*)fTracks->At(it);
	    index = FindMatchedCluster(track);
	    if (index>-1) 
	      {
		AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(index);
		track->SetEMCALcluster(cluster->Index());
		track->SetStatus(AliESDtrack::kEMCALmatch);
	      }
	  }

	return 0;
}

//
//------------------------------------------------------------------------------
//
Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track)
{         
  //
  // For each track, extrapolate it to all the clusters
  // Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts
  //

  Float_t maxEta=fCutEta;
  Float_t maxPhi=fCutPhi;
  Int_t index = -1;
  
  // If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation
  // Otherwise use the TPCInner point
  AliExternalTrackParam *trkParam = 0;
  const AliESDfriendTrack*  friendTrack = track->GetFriendTrack();
  if(friendTrack && friendTrack->GetTPCOut())
    trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
  else
    trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
  if(!trkParam) return index;


  AliExternalTrackParam trkParamTmp(*trkParam);
  Float_t eta, phi;
  if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, 430., track->GetMass(kTRUE), fStep, eta, phi))  return index;
  track->SetTrackPhiEtaOnEMCal(phi,eta);
  if(TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()) return index;

  //Perform extrapolation
  Double_t trkPos[3];
  trkParamTmp.GetXYZ(trkPos);
  Int_t nclusters = fClusters->GetEntries();
  for(Int_t ic=0; ic<nclusters; ic++)
    {
      AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
      Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()};
      Double_t dR = TMath::Sqrt(TMath::Power(trkPos[0]-clsPos[0],2)+TMath::Power(trkPos[1]-clsPos[1],2)+TMath::Power(trkPos[2]-clsPos[2],2));
      if(dR > fClusterWindow) continue;
      
      AliExternalTrackParam trkParTmp(trkParamTmp);

      Float_t tmpEta, tmpPhi;
      if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue;
      if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta))
        {
          maxPhi=tmpPhi;
          maxEta=tmpEta;
          index=ic;
        }
      }
  return index;
}

//
//------------------------------------------------------------------------------
//
void AliEMCALTracker::UnloadClusters() 
{
	//
	// Free memory from all arrays
        // This method is called after the local tracking step
        // so we can safely delete everything 
	//
	
  	Clear();
}

//
//------------------------------------------------------------------------------
//
AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
  : fIndex(index),
    fX(0.),
    fY(0.),
    fZ(0.)
{
	//
	// Translates an AliEMCALRecPoint object into the internal format.
	// Index of passed cluster in its native array must be specified.
	//
	TVector3 clpos;
	recPoint->GetGlobalPosition(clpos);
	
	fX = clpos.X();
	fY = clpos.Y();
	fZ = clpos.Z();
}
//
//------------------------------------------------------------------------------
//
AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
  : fIndex(index),
    fX(0.),
    fY(0.),
    fZ(0.)
{
	//
	// Translates an AliESDCaloCluster object into the internal format.
	// Index of passed cluster in its native array must be specified.
	//
	Float_t clpos[3]= {0., 0., 0.};
	caloCluster->GetPosition(clpos);
	
	fX = (Double_t)clpos[0];
	fY = (Double_t)clpos[1];
	fZ = (Double_t)clpos[2];
}
Commit	Line	Data
fe17d4cb	1	//========================================================================
	2	// Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
	3	//
	4	// Author: The ALICE Off-line Project.
	5	// Contributors are mentioned in the code where appropriate.
	6	//
	7	// Permission to use, copy, modify and distribute this software and its
	8	// documentation strictly for non-commercial purposes is hereby granted
	9	// without fee, provided that the above copyright notice appears in all
	10	// copies and that both the copyright notice and this permission notice
	11	// appear in the supporting documentation. The authors make no claims
	12	// about the suitability of this software for any purpose. It is
	13	// provided "as is" without express or implied warranty.
	14	//========================================================================
	15	//
	16	// Class AliEMCALTracker
	17	// -----------------------
	18	// Implementation of the track matching method between barrel tracks and
	19	// EMCAL clusters.
	20	// Besides algorithm implementation, some cuts are required to be set
	21	// in order to define, for each track, an acceptance window where clusters
	22	// are searched to find best match (if any).
	23	// The class accepts as input an ESD container, and works directly on it,
	24	// simply setting, for each of its tracks, the fEMCALindex flag, for each
	25	// track which is matched to a cluster.
	26	// In order to use method, one must launch PropagateBack().
	27	//
	28	// ------------------------------------------------------------------------
	29	// author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
5970dfe2	30	// Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch)
fe17d4cb	31	//=========================================================================
	32
	33	#include <Riostream.h>
	34	#include <iomanip>
	35
	36	#include <TFile.h>
	37	#include <TTree.h>
fe17d4cb	38	#include <TList.h>
	39	#include <TString.h>
	40	#include <TVector3.h>
	41	#include <TClonesArray.h>
c61f0e70	42	#include <TGeoMatrix.h>
fe17d4cb	43
fe17d4cb	44	#include "AliLog.h"
af885e0f	45	#include "AliESDEvent.h"
fe17d4cb	46	#include "AliESDtrack.h"
89ffc0b0	47	#include "AliESDCaloCluster.h"
fe17d4cb	48	#include "AliEMCALRecPoint.h"
	49	#include "AliRunLoader.h"
	50	#include "AliEMCALTrack.h"
	51	#include "AliEMCALLoader.h"
c61f0e70	52	#include "AliEMCALGeometry.h"
8ba062b1	53	#include "AliEMCALReconstructor.h"
	54	#include "AliEMCALRecParam.h"
	55	#include "AliCDBEntry.h"
	56	#include "AliCDBManager.h"
3e3faf55	57	#include "AliEMCALReconstructor.h"
ee602376	58	#include "AliEMCALRecoUtils.h"
c61f0e70	59
fe17d4cb	60	#include "AliEMCALTracker.h"
fe17d4cb	61
0267cfa6	62	using std::cerr;
0267cfa6	63	using std::endl;
fe17d4cb	64	ClassImp(AliEMCALTracker)
8ba062b1	65
fe17d4cb	66	//
	67	//------------------------------------------------------------------------------
	68	//
	69	AliEMCALTracker::AliEMCALTracker()
8fc351e3	70	: AliTracker(),
	71	fCutPt(0),
	72	fCutNITS(0),
	73	fCutNTPC(50),
da34fafe	74	fStep(20),
8fc351e3	75	fTrackCorrMode(kTrackCorrMMB),
	76	fClusterWindow(50),
	77	fCutEta(0.025),
	78	fCutPhi(0.05),
	79	fTracks(0),
	80	fClusters(0),
	81	fGeom(0)
fe17d4cb	82	{
5970dfe2	83	//
	84	// Default constructor.
	85	// Initializes all simple data members to default values,
	86	// and all collections to NULL.
	87	// Output file name is set to a default value.
	88	//
0832a2bf	89	InitParameters();
fe17d4cb	90	}
	91	//
	92	//------------------------------------------------------------------------------
	93	//
	94	AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
	95	: AliTracker(),
5970dfe2	96	fCutPt(copy.fCutPt),
dcd86c5d	97	fCutNITS(copy.fCutNITS),
dcd86c5d	98	fCutNTPC(copy.fCutNTPC),
5970dfe2	99	fStep(copy.fStep),
5970dfe2	100	fTrackCorrMode(copy.fTrackCorrMode),
8fc351e3	101	fClusterWindow(copy.fClusterWindow),
5970dfe2	102	fCutEta(copy.fCutEta),
5970dfe2	103	fCutPhi(copy.fCutPhi),
fe17d4cb	104	fTracks((TObjArray*)copy.fTracks->Clone()),
fe17d4cb	105	fClusters((TObjArray*)copy.fClusters->Clone()),
c61f0e70	106	fGeom(copy.fGeom)
fe17d4cb	107	{
5970dfe2	108	//
	109	// Copy constructor
	110	// Besides copying all parameters, duplicates all collections.
	111	//
fe17d4cb	112	}
	113	//
	114	//------------------------------------------------------------------------------
	115	//
f1d9131f	116	AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source)
	117	{ // assignment operator; use copy ctor
	118	if (&source == this) return *this;
5970dfe2	119
f1d9131f	120	new (this) AliEMCALTracker(source);
f1d9131f	121	return *this;
fe17d4cb	122	}
	123	//
	124	//------------------------------------------------------------------------------
	125	//
8ba062b1	126	void AliEMCALTracker::InitParameters()
8ba062b1	127	{
5970dfe2	128	//
	129	// Retrieve initialization parameters
	130	//
8ba062b1	131
8ba062b1	132	// Check if the instance of AliEMCALRecParam exists,
3e3faf55	133	const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
3a2a23e1	134
ba6de5ea	135	if(!recParam){
ba6de5ea	136	AliFatal("Reconstruction parameters for EMCAL not set!");
8ba062b1	137	}
41f05b8c	138	else{
5970dfe2	139
	140	fCutEta = recParam->GetMthCutEta();
	141	fCutPhi = recParam->GetMthCutPhi();
8fc351e3	142	fStep = recParam->GetExtrapolateStep();
5970dfe2	143	fCutPt = recParam->GetTrkCutPt();
8fc351e3	144	fCutNITS = recParam->GetTrkCutNITS();
8fc351e3	145	fCutNTPC = recParam->GetTrkCutNTPC();
41f05b8c	146	}
3e3faf55	147
8ba062b1	148	}
5970dfe2	149
c61f0e70	150	//
	151	//------------------------------------------------------------------------------
	152	//
fe17d4cb	153	void AliEMCALTracker::Clear(Option_t* option)
	154	{
	155	//
	156	// Clearing method
044225d9	157	// Deletes all objects in arrays and the arrays themselves
fe17d4cb	158	//
	159
	160	TString opt(option);
	161	Bool_t clearTracks = opt.Contains("TRACKS");
	162	Bool_t clearClusters = opt.Contains("CLUSTERS");
fe17d4cb	163	if (opt.Contains("ALL")) {
	164	clearTracks = kTRUE;
	165	clearClusters = kTRUE;
fe17d4cb	166	}
fe17d4cb	167
5970dfe2	168	//fTracks is a collection of esdTrack
5970dfe2	169	//When clearing this array, the linked objects should not be deleted
fe17d4cb	170	if (fTracks != 0x0 && clearTracks) {
5970dfe2	171	fTracks->Clear();
044225d9	172	delete fTracks;
044225d9	173	fTracks = 0;
fe17d4cb	174	}
fe17d4cb	175	if (fClusters != 0x0 && clearClusters) {
044225d9	176	fClusters->Delete();
	177	delete fClusters;
	178	fClusters = 0;
fe17d4cb	179	}
fe17d4cb	180	}
	181	//
	182	//------------------------------------------------------------------------------
	183	//
	184	Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
	185	{
	186	//
	187	// Load EMCAL clusters in the form of AliEMCALRecPoint,
	188	// from simulation temporary files.
	189	// (When included in reconstruction chain, this method is used automatically)
	190	//
	191
	192	Clear("CLUSTERS");
	193
bce21ea7	194	cTree->SetBranchStatus("*",0); //disable all branches
	195	cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need
	196
fe17d4cb	197	TBranch *branch = cTree->GetBranch("EMCALECARP");
fe17d4cb	198	if (!branch) {
c61f0e70	199	AliError("Can't get the branch with the EMCAL clusters");
fe17d4cb	200	return 1;
	201	}
	202
9596d957	203	TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
fe17d4cb	204	branch->SetAddress(&clusters);
fe17d4cb	205
bce21ea7	206	//cTree->GetEvent(0);
bce21ea7	207	branch->GetEntry(0);
9596d957	208	Int_t nClusters = (Int_t)clusters->GetEntries();
bce21ea7	209	if(fClusters) fClusters->Delete();
bce21ea7	210	else fClusters = new TObjArray(0);
fe17d4cb	211	for (Int_t i = 0; i < nClusters; i++) {
	212	AliEMCALRecPoint cluster = (AliEMCALRecPoint)clusters->At(i);
	213	if (!cluster) continue;
fe17d4cb	214	AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
	215	fClusters->AddLast(matchCluster);
	216	}
3d9e8b15	217
2ad4424e	218	branch->SetAddress(0);
	219	clusters->Delete();
	220	delete clusters;
	221
5970dfe2	222	AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries()));
fe17d4cb	223
	224	return 0;
	225	}
	226	//
	227	//------------------------------------------------------------------------------
	228	//
af885e0f	229	Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
fe17d4cb	230	{
5970dfe2	231	//
	232	// Load EMCAL clusters in the form of AliESDCaloClusters,
	233	// from an AliESD object.
	234	//
	235
	236	// make sure that tracks/clusters collections are empty
	237	Clear("CLUSTERS");
	238	fClusters = new TObjArray(0);
	239
	240	Int_t nClusters = esd->GetNumberOfCaloClusters();
	241	for (Int_t i=0; i<nClusters; i++)
	242	{
	243	AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
	244	if (!cluster \|\| !cluster->IsEMCAL()) continue ;
	245	AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
	246	fClusters->AddLast(matchCluster);
	247	}
	248
	249	AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
	250	return 0;
fe17d4cb	251	}
	252	//
	253	//------------------------------------------------------------------------------
	254	//
af885e0f	255	Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
fe17d4cb	256	{
5970dfe2	257	//
	258	// Load ESD tracks.
	259	//
fe17d4cb	260
5970dfe2	261	Clear("TRACKS");
5970dfe2	262	fTracks = new TObjArray(0);
fe17d4cb	263
5970dfe2	264	Int_t nTracks = esd->GetNumberOfTracks();
8fc351e3	265	//Bool_t isKink=kFALSE;
5970dfe2	266	for (Int_t i = 0; i < nTracks; i++)
	267	{
	268	AliESDtrack *esdTrack = esd->GetTrack(i);
	269	// set by default the value corresponding to "no match"
	270	esdTrack->SetEMCALcluster(kUnmatched);
8fc351e3	271	esdTrack->ResetStatus(AliESDtrack::kEMCALmatch);
5970dfe2	272
	273	//Select good quaulity tracks
	274	if(esdTrack->Pt()<fCutPt) continue;
	275	if(esdTrack->GetNcls(1)<fCutNTPC)continue;
	276
5970dfe2	277	//Loose geometric cut
5970dfe2	278	Double_t phi = esdTrack->Phi()*TMath::RadToDeg();
d874f457	279	if(TMath::Abs(esdTrack->Eta())>0.8 \|\| phi <= 20 \|\| phi >= 240 ) continue;
5970dfe2	280
	281	fTracks->AddLast(esdTrack);
	282	}
	283
	284	AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
	285	return 0;
	286	}
	287	//
	288	//------------------------------------------------------------------------------
	289	//
	290	void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
	291	{
	292	//
	293	// Set track correction mode
	294	// gest the choice in string format and converts into
	295	// internal enum
	296	//
	297
	298	TString opt(option);
	299	opt.ToUpper();
	300
	301	if (!opt.CompareTo("NONE"))
	302	{
	303	fTrackCorrMode = kTrackCorrNone;
	304	}
	305	else if (!opt.CompareTo("MMB"))
	306	{
	307	fTrackCorrMode = kTrackCorrMMB;
	308	}
	309	else
	310	{
	311	cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
	312	}
fe17d4cb	313	}
	314	//
	315	//------------------------------------------------------------------------------
	316	//
af885e0f	317	Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
fe17d4cb	318	{
	319	//
	320	// Main operation method.
	321	// Gets external AliESD containing tracks to be matched.
	322	// After executing match finding, stores in the same ESD object all infos
	323	// and releases the object for further reconstruction steps.
	324	//
3d9e8b15	325	//
	326	// Note: should always return 0=OK, because otherwise all tracking
	327	// is aborted for this event
5970dfe2	328
fe17d4cb	329	if (!esd) {
	330	AliError("NULL ESD passed");
	331	return 1;
	332	}
	333
5970dfe2	334	// step 1: collect clusters
c61f0e70	335	Int_t okLoadClusters, nClusters;
fe17d4cb	336	if (!fClusters \|\| (fClusters && fClusters->IsEmpty())) {
fe17d4cb	337	okLoadClusters = LoadClusters(esd);
fe17d4cb	338	}
c61f0e70	339	nClusters = fClusters->GetEntries();
5970dfe2	340
	341	// step 2: collect ESD tracks
	342	Int_t nTracks, okLoadTracks;
	343	okLoadTracks = LoadTracks(esd);
c61f0e70	344	nTracks = fTracks->GetEntries();
fe17d4cb	345
5970dfe2	346	// step 3: for each track, find the closest cluster as matched within residual cuts
	347	Int_t index=-1;
	348	for (Int_t it = 0; it < nTracks; it++)
	349	{
	350	AliESDtrack track = (AliESDtrack)fTracks->At(it);
	351	index = FindMatchedCluster(track);
	352	if (index>-1)
	353	{
	354	AliEMCALMatchCluster cluster = (AliEMCALMatchCluster)fClusters->At(index);
	355	track->SetEMCALcluster(cluster->Index());
952d023a	356	track->SetStatus(AliESDtrack::kEMCALmatch);
5970dfe2	357	}
5970dfe2	358	}
fe17d4cb	359
	360	return 0;
	361	}
fe17d4cb	362
	363	//
	364	//------------------------------------------------------------------------------
	365	//
5970dfe2	366	Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track)
	367	{
	368	//
	369	// For each track, extrapolate it to all the clusters
	370	// Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts
	371	//
17773e2e	372
ee602376	373	Float_t maxEta=fCutEta;
ee602376	374	Float_t maxPhi=fCutPhi;
5970dfe2	375	Int_t index = -1;
	376
	377	// If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation
	378	// Otherwise use the TPCInner point
8108ab9e	379	AliExternalTrackParam *trkParam = 0;
5970dfe2	380	const AliESDfriendTrack* friendTrack = track->GetFriendTrack();
	381	if(friendTrack && friendTrack->GetTPCOut())
	382	trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
	383	else
	384	trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
	385	if(!trkParam) return index;
	386
8fc351e3	387
8fc351e3	388	AliExternalTrackParam trkParamTmp(*trkParam);
ee602376	389	Float_t eta, phi;
da25bc37	390	if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, 430., track->GetMass(kTRUE), fStep, eta, phi)) return index;
ed15417e	391	track->SetTrackPhiEtaOnEMCal(phi,eta);
8fc351e3	392	if(TMath::Abs(eta)>0.75 \|\| (phi) < 70TMath::DegToRad() \|\| (phi) > 190TMath::DegToRad()) return index;
8fc351e3	393
5970dfe2	394	//Perform extrapolation
5970dfe2	395	Double_t trkPos[3];
8fc351e3	396	trkParamTmp.GetXYZ(trkPos);
5970dfe2	397	Int_t nclusters = fClusters->GetEntries();
	398	for(Int_t ic=0; ic<nclusters; ic++)
	399	{
5970dfe2	400	AliEMCALMatchCluster cluster = (AliEMCALMatchCluster)fClusters->At(ic);
8fc351e3	401	Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()};
	402	Double_t dR = TMath::Sqrt(TMath::Power(trkPos[0]-clsPos[0],2)+TMath::Power(trkPos[1]-clsPos[1],2)+TMath::Power(trkPos[2]-clsPos[2],2));
	403	if(dR > fClusterWindow) continue;
	404
	405	AliExternalTrackParam trkParTmp(trkParamTmp);
	406
ee602376	407	Float_t tmpEta, tmpPhi;
da25bc37	408	if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue;
5970dfe2	409	if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta))
	410	{
	411	maxPhi=tmpPhi;
	412	maxEta=tmpEta;
	413	index=ic;
	414	}
5970dfe2	415	}
5970dfe2	416	return index;
fe17d4cb	417	}
5970dfe2	418
fe17d4cb	419	//
	420	//------------------------------------------------------------------------------
	421	//
	422	void AliEMCALTracker::UnloadClusters()
	423	{
	424	//
044225d9	425	// Free memory from all arrays
	426	// This method is called after the local tracking step
	427	// so we can safely delete everything
fe17d4cb	428	//
fe17d4cb	429
044225d9	430	Clear();
fe17d4cb	431	}
04475328	432
fe17d4cb	433	//
	434	//------------------------------------------------------------------------------
	435	//
	436	AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
	437	: fIndex(index),
fe17d4cb	438	fX(0.),
	439	fY(0.),
	440	fZ(0.)
	441	{
	442	//
	443	// Translates an AliEMCALRecPoint object into the internal format.
	444	// Index of passed cluster in its native array must be specified.
	445	//
	446	TVector3 clpos;
	447	recPoint->GetGlobalPosition(clpos);
	448
	449	fX = clpos.X();
	450	fY = clpos.Y();
	451	fZ = clpos.Z();
	452	}
	453	//
	454	//------------------------------------------------------------------------------
	455	//
	456	AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
	457	: fIndex(index),
fe17d4cb	458	fX(0.),
	459	fY(0.),
	460	fZ(0.)
	461	{
	462	//
	463	// Translates an AliESDCaloCluster object into the internal format.
	464	// Index of passed cluster in its native array must be specified.
	465	//
53e430a3	466	Float_t clpos[3]= {0., 0., 0.};
7592dfc4	467	caloCluster->GetPosition(clpos);
fe17d4cb	468
	469	fX = (Double_t)clpos[0];
	470	fY = (Double_t)clpos[1];
	471	fZ = (Double_t)clpos[2];
	472	}