[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),
  fEMCalSurfaceDistance(440),
  fClusterWindow(50),
  fCutEta(0.025),
  fCutPhi(0.05),
  fITSTrackSA(kFALSE),
  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),
    fEMCalSurfaceDistance(copy.fEMCalSurfaceDistance),
    fClusterWindow(copy.fClusterWindow),
    fCutEta(copy.fCutEta),
    fCutPhi(copy.fCutPhi),
    fITSTrackSA(copy.fITSTrackSA), 
    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.
  //

  UInt_t mask1 = esd->GetESDRun()->GetDetectorsInDAQ();
  UInt_t mask2 = esd->GetESDRun()->GetDetectorsInReco();
  Bool_t desc1 = (mask1 >> 3) & 0x1;
  Bool_t desc2 = (mask2 >> 3) & 0x1;
  if (desc1==0 || desc2==0) {
//     AliError(Form("TPC not in DAQ/RECO: %u (%u)/%u (%u)",
//                   mask1, esd->GetESDRun()->GetDetectorsInReco(),
//                   mask2, esd->GetESDRun()->GetDetectorsInDAQ()));
    fITSTrackSA = kTRUE;
  }
  
  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(!fITSTrackSA)
	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;
  
  if(!fITSTrackSA){ 
    const AliESDfriendTrack*  friendTrack = track->GetFriendTrack();
    if(friendTrack && friendTrack->GetTPCOut())
      trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
    else if(track->GetInnerParam())
      trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
  }
  else
    trkParam = new AliExternalTrackParam(*track);
  
  if(!trkParam) return index;
  
  AliExternalTrackParam trkParamTmp(*trkParam);
  Float_t eta, phi, pt;
  if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, fEMCalSurfaceDistance, track->GetMass(kTRUE), fStep, eta, phi, pt))  {
	if(fITSTrackSA) delete trkParam;
	return index;
  }
  track->SetTrackPhiEtaPtOnEMCal(phi,eta,pt);
  if(TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()){
	 if(fITSTrackSA) delete trkParam;
	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));
//       printf("\n dR=%f,wind=%f\n",dR,fClusterWindow); //MARCEL
      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;
        }
      }

  if(fITSTrackSA) delete trkParam;
  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
	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)
	30	// Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch)
	31	//=========================================================================
	32
	33	#include <Riostream.h>
	34	#include <iomanip>
	35
	36	#include <TFile.h>
	37	#include <TTree.h>
	38	#include <TList.h>
	39	#include <TString.h>
	40	#include <TVector3.h>
	41	#include <TClonesArray.h>
	42	#include <TGeoMatrix.h>
	43
	44	#include "AliLog.h"
	45	#include "AliESDEvent.h"
	46	#include "AliESDtrack.h"
	47	#include "AliESDCaloCluster.h"
	48	#include "AliEMCALRecPoint.h"
	49	#include "AliRunLoader.h"
	50	#include "AliEMCALTrack.h"
	51	#include "AliEMCALLoader.h"
	52	#include "AliEMCALGeometry.h"
	53	#include "AliEMCALReconstructor.h"
	54	#include "AliEMCALRecParam.h"
	55	#include "AliCDBEntry.h"
	56	#include "AliCDBManager.h"
	57	#include "AliEMCALReconstructor.h"
	58	#include "AliEMCALRecoUtils.h"
	59
	60	#include "AliEMCALTracker.h"
	61
	62	using std::cerr;
	63	using std::endl;
	64	ClassImp(AliEMCALTracker)
	65
	66	//
	67	//------------------------------------------------------------------------------
	68	//
	69	AliEMCALTracker::AliEMCALTracker()
	70	: AliTracker(),
	71	fCutPt(0),
	72	fCutNITS(0),
	73	fCutNTPC(50),
	74	fStep(20),
	75	fTrackCorrMode(kTrackCorrMMB),
	76	fEMCalSurfaceDistance(440),
	77	fClusterWindow(50),
	78	fCutEta(0.025),
	79	fCutPhi(0.05),
	80	fITSTrackSA(kFALSE),
	81	fTracks(0),
	82	fClusters(0),
	83	fGeom(0)
	84	{
	85	//
	86	// Default constructor.
	87	// Initializes all simple data members to default values,
	88	// and all collections to NULL.
	89	// Output file name is set to a default value.
	90	//
	91	InitParameters();
	92	}
	93	//
	94	//------------------------------------------------------------------------------
	95	//
	96	AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
	97	: AliTracker(),
	98	fCutPt(copy.fCutPt),
	99	fCutNITS(copy.fCutNITS),
	100	fCutNTPC(copy.fCutNTPC),
	101	fStep(copy.fStep),
	102	fTrackCorrMode(copy.fTrackCorrMode),
	103	fEMCalSurfaceDistance(copy.fEMCalSurfaceDistance),
	104	fClusterWindow(copy.fClusterWindow),
	105	fCutEta(copy.fCutEta),
	106	fCutPhi(copy.fCutPhi),
	107	fITSTrackSA(copy.fITSTrackSA),
	108	fTracks((TObjArray*)copy.fTracks->Clone()),
	109	fClusters((TObjArray*)copy.fClusters->Clone()),
	110	fGeom(copy.fGeom)
	111	{
	112	//
	113	// Copy constructor
	114	// Besides copying all parameters, duplicates all collections.
	115	//
	116	}
	117	//
	118	//------------------------------------------------------------------------------
	119	//
	120	AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source)
	121	{ // assignment operator; use copy ctor
	122	if (&source == this) return *this;
	123
	124	new (this) AliEMCALTracker(source);
	125	return *this;
	126	}
	127	//
	128	//------------------------------------------------------------------------------
	129	//
	130	void AliEMCALTracker::InitParameters()
	131	{
	132	//
	133	// Retrieve initialization parameters
	134	//
	135
	136	// Check if the instance of AliEMCALRecParam exists,
	137	const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
	138
	139	if(!recParam){
	140	AliFatal("Reconstruction parameters for EMCAL not set!");
	141	}
	142	else{
	143
	144	fCutEta = recParam->GetMthCutEta();
	145	fCutPhi = recParam->GetMthCutPhi();
	146	fStep = recParam->GetExtrapolateStep();
	147	fCutPt = recParam->GetTrkCutPt();
	148	fCutNITS = recParam->GetTrkCutNITS();
	149	fCutNTPC = recParam->GetTrkCutNTPC();
	150	}
	151
	152	}
	153
	154	//
	155	//------------------------------------------------------------------------------
	156	//
	157	void AliEMCALTracker::Clear(Option_t* option)
	158	{
	159	//
	160	// Clearing method
	161	// Deletes all objects in arrays and the arrays themselves
	162	//
	163
	164	TString opt(option);
	165	Bool_t clearTracks = opt.Contains("TRACKS");
	166	Bool_t clearClusters = opt.Contains("CLUSTERS");
	167	if (opt.Contains("ALL")) {
	168	clearTracks = kTRUE;
	169	clearClusters = kTRUE;
	170	}
	171
	172	//fTracks is a collection of esdTrack
	173	//When clearing this array, the linked objects should not be deleted
	174	if (fTracks != 0x0 && clearTracks) {
	175	fTracks->Clear();
	176	delete fTracks;
	177	fTracks = 0;
	178	}
	179	if (fClusters != 0x0 && clearClusters) {
	180	fClusters->Delete();
	181	delete fClusters;
	182	fClusters = 0;
	183	}
	184	}
	185	//
	186	//------------------------------------------------------------------------------
	187	//
	188	Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
	189	{
	190	//
	191	// Load EMCAL clusters in the form of AliEMCALRecPoint,
	192	// from simulation temporary files.
	193	// (When included in reconstruction chain, this method is used automatically)
	194	//
	195
	196	Clear("CLUSTERS");
	197
	198	cTree->SetBranchStatus("*",0); //disable all branches
	199	cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need
	200
	201	TBranch *branch = cTree->GetBranch("EMCALECARP");
	202	if (!branch) {
	203	AliError("Can't get the branch with the EMCAL clusters");
	204	return 1;
	205	}
	206
	207	TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
	208	branch->SetAddress(&clusters);
	209
	210	//cTree->GetEvent(0);
	211	branch->GetEntry(0);
	212	Int_t nClusters = (Int_t)clusters->GetEntries();
	213	if(fClusters) fClusters->Delete();
	214	else fClusters = new TObjArray(0);
	215	for (Int_t i = 0; i < nClusters; i++) {
	216	AliEMCALRecPoint cluster = (AliEMCALRecPoint)clusters->At(i);
	217	if (!cluster) continue;
	218	AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
	219	fClusters->AddLast(matchCluster);
	220	}
	221
	222	branch->SetAddress(0);
	223	clusters->Delete();
	224	delete clusters;
	225
	226	AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries()));
	227
	228	return 0;
	229	}
	230	//
	231	//------------------------------------------------------------------------------
	232	//
	233	Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
	234	{
	235	//
	236	// Load EMCAL clusters in the form of AliESDCaloClusters,
	237	// from an AliESD object.
	238	//
	239
	240	// make sure that tracks/clusters collections are empty
	241	Clear("CLUSTERS");
	242	fClusters = new TObjArray(0);
	243
	244	Int_t nClusters = esd->GetNumberOfCaloClusters();
	245	for (Int_t i=0; i<nClusters; i++)
	246	{
	247	AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
	248	if (!cluster \|\| !cluster->IsEMCAL()) continue ;
	249	AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
	250	fClusters->AddLast(matchCluster);
	251	}
	252
	253	AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
	254	return 0;
	255	}
	256	//
	257	//------------------------------------------------------------------------------
	258	//
	259	Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
	260	{
	261	//
	262	// Load ESD tracks.
	263	//
	264
	265	UInt_t mask1 = esd->GetESDRun()->GetDetectorsInDAQ();
	266	UInt_t mask2 = esd->GetESDRun()->GetDetectorsInReco();
	267	Bool_t desc1 = (mask1 >> 3) & 0x1;
	268	Bool_t desc2 = (mask2 >> 3) & 0x1;
	269	if (desc1==0 \|\| desc2==0) {
	270	// AliError(Form("TPC not in DAQ/RECO: %u (%u)/%u (%u)",
	271	// mask1, esd->GetESDRun()->GetDetectorsInReco(),
	272	// mask2, esd->GetESDRun()->GetDetectorsInDAQ()));
	273	fITSTrackSA = kTRUE;
	274	}
	275
	276	Clear("TRACKS");
	277	fTracks = new TObjArray(0);
	278
	279	Int_t nTracks = esd->GetNumberOfTracks();
	280	//Bool_t isKink=kFALSE;
	281	for (Int_t i = 0; i < nTracks; i++)
	282	{
	283	AliESDtrack *esdTrack = esd->GetTrack(i);
	284	// set by default the value corresponding to "no match"
	285	esdTrack->SetEMCALcluster(kUnmatched);
	286	esdTrack->ResetStatus(AliESDtrack::kEMCALmatch);
	287
	288	//Select good quaulity tracks
	289	if(esdTrack->Pt()<fCutPt) continue;
	290	if(!fITSTrackSA)
	291	if(esdTrack->GetNcls(1)<fCutNTPC)continue;
	292
	293	//Loose geometric cut
	294	Double_t phi = esdTrack->Phi()*TMath::RadToDeg();
	295	if(TMath::Abs(esdTrack->Eta())>0.8 \|\| phi <= 20 \|\| phi >= 240 ) continue;
	296
	297	fTracks->AddLast(esdTrack);
	298	}
	299
	300	AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
	301	return 0;
	302	}
	303	//
	304	//------------------------------------------------------------------------------
	305	//
	306	void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
	307	{
	308	//
	309	// Set track correction mode
	310	// gest the choice in string format and converts into
	311	// internal enum
	312	//
	313
	314	TString opt(option);
	315	opt.ToUpper();
	316
	317	if (!opt.CompareTo("NONE"))
	318	{
	319	fTrackCorrMode = kTrackCorrNone;
	320	}
	321	else if (!opt.CompareTo("MMB"))
	322	{
	323	fTrackCorrMode = kTrackCorrMMB;
	324	}
	325	else
	326	{
	327	cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
	328	}
	329	}
	330	//
	331	//------------------------------------------------------------------------------
	332	//
	333	Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
	334	{
	335	//
	336	// Main operation method.
	337	// Gets external AliESD containing tracks to be matched.
	338	// After executing match finding, stores in the same ESD object all infos
	339	// and releases the object for further reconstruction steps.
	340	//
	341	//
	342	// Note: should always return 0=OK, because otherwise all tracking
	343	// is aborted for this event
	344
	345	if (!esd) {
	346	AliError("NULL ESD passed");
	347	return 1;
	348	}
	349
	350	// step 1: collect clusters
	351	Int_t okLoadClusters, nClusters;
	352	if (!fClusters \|\| (fClusters && fClusters->IsEmpty())) {
	353	okLoadClusters = LoadClusters(esd);
	354	}
	355	nClusters = fClusters->GetEntries();
	356
	357	// step 2: collect ESD tracks
	358	Int_t nTracks, okLoadTracks;
	359	okLoadTracks = LoadTracks(esd);
	360	nTracks = fTracks->GetEntries();
	361
	362	// step 3: for each track, find the closest cluster as matched within residual cuts
	363	Int_t index=-1;
	364	for (Int_t it = 0; it < nTracks; it++)
	365	{
	366	AliESDtrack track = (AliESDtrack)fTracks->At(it);
	367	index = FindMatchedCluster(track);
	368	if (index>-1)
	369	{
	370	AliEMCALMatchCluster cluster = (AliEMCALMatchCluster)fClusters->At(index);
	371	track->SetEMCALcluster(cluster->Index());
	372	track->SetStatus(AliESDtrack::kEMCALmatch);
	373	}
	374	}
	375
	376	return 0;
	377	}
	378
	379	//
	380	//------------------------------------------------------------------------------
	381	//
	382	Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track)
	383	{
	384	//
	385	// For each track, extrapolate it to all the clusters
	386	// Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts
	387	//
	388
	389	Float_t maxEta=fCutEta;
	390	Float_t maxPhi=fCutPhi;
	391	Int_t index = -1;
	392
	393	// If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation
	394	// Otherwise use the TPCInner point
	395	AliExternalTrackParam *trkParam = 0;
	396
	397	if(!fITSTrackSA){
	398	const AliESDfriendTrack* friendTrack = track->GetFriendTrack();
	399	if(friendTrack && friendTrack->GetTPCOut())
	400	trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
	401	else if(track->GetInnerParam())
	402	trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
	403	}
	404	else
	405	trkParam = new AliExternalTrackParam(*track);
	406
	407	if(!trkParam) return index;
	408
	409	AliExternalTrackParam trkParamTmp(*trkParam);
	410	Float_t eta, phi, pt;
	411	if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, fEMCalSurfaceDistance, track->GetMass(kTRUE), fStep, eta, phi, pt)) {
	412	if(fITSTrackSA) delete trkParam;
	413	return index;
	414	}
	415	track->SetTrackPhiEtaPtOnEMCal(phi,eta,pt);
	416	if(TMath::Abs(eta)>0.75 \|\| (phi) < 70TMath::DegToRad() \|\| (phi) > 190TMath::DegToRad()){
	417	if(fITSTrackSA) delete trkParam;
	418	return index;
	419	}
	420
	421	//Perform extrapolation
	422	Double_t trkPos[3];
	423	trkParamTmp.GetXYZ(trkPos);
	424	Int_t nclusters = fClusters->GetEntries();
	425	for(Int_t ic=0; ic<nclusters; ic++)
	426	{
	427	AliEMCALMatchCluster cluster = (AliEMCALMatchCluster)fClusters->At(ic);
	428	Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()};
	429	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));
	430	// printf("\n dR=%f,wind=%f\n",dR,fClusterWindow); //MARCEL
	431	if(dR > fClusterWindow) continue;
	432
	433	AliExternalTrackParam trkParTmp(trkParamTmp);
	434
	435	Float_t tmpEta, tmpPhi;
	436	if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue;
	437	if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta))
	438	{
	439	maxPhi=tmpPhi;
	440	maxEta=tmpEta;
	441	index=ic;
	442	}
	443	}
	444
	445	if(fITSTrackSA) delete trkParam;
	446	return index;
	447	}
	448
	449	//
	450	//------------------------------------------------------------------------------
	451	//
	452	void AliEMCALTracker::UnloadClusters()
	453	{
	454	//
	455	// Free memory from all arrays
	456	// This method is called after the local tracking step
	457	// so we can safely delete everything
	458	//
	459
	460	Clear();
	461	}
	462
	463	//
	464	//------------------------------------------------------------------------------
	465	//
	466	AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
	467	: fIndex(index),
	468	fX(0.),
	469	fY(0.),
	470	fZ(0.)
	471	{
	472	//
	473	// Translates an AliEMCALRecPoint object into the internal format.
	474	// Index of passed cluster in its native array must be specified.
	475	//
	476	TVector3 clpos;
	477	recPoint->GetGlobalPosition(clpos);
	478
	479	fX = clpos.X();
	480	fY = clpos.Y();
	481	fZ = clpos.Z();
	482	}
	483	//
	484	//------------------------------------------------------------------------------
	485	//
	486	AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
	487	: fIndex(index),
	488	fX(0.),
	489	fY(0.),
	490	fZ(0.)
	491	{
	492	//
	493	// Translates an AliESDCaloCluster object into the internal format.
	494	// Index of passed cluster in its native array must be specified.
	495	//
	496	Float_t clpos[3]= {0., 0., 0.};
	497	caloCluster->GetPosition(clpos);
	498
	499	fX = (Double_t)clpos[0];
	500	fY = (Double_t)clpos[1];
	501	fZ = (Double_t)clpos[2];
	502	}