[u/mrichter/AliRoot.git] / MUON / AliMUONRecoCheck.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.                  *
 **************************************************************************/

//////////////////////////////////////////////////////////////////////////////////////
//                                                                     
// Utility class to check the muon reconstruction. Reconstructed tracks are compared
// to reference tracks. The reference tracks are built from AliTrackReference for the
// hit in chamber (0..9) and from kinematics for the vertex parameters.     
//                                                                      
//////////////////////////////////////////////////////////////////////////////////////


#include <TParticle.h>

#include "AliRun.h" // for gAlice
#include "AliLog.h" 
#include "AliLoader.h" 
#include "AliRunLoader.h" 
#include "AliTrackReference.h"
#include "AliHeader.h"
#include "AliMC.h"
#include "AliStack.h"
#include "AliMUON.h"
#include "AliMUONRecoCheck.h"
#include "AliMUONTrack.h"
#include "AliMUONData.h"
#include "AliMUONChamber.h"
#include "AliMUONConstants.h"

ClassImp(AliMUONRecoCheck)

//_____________________________________________________________________________
AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader)
{
// Constructor
  fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);

  // open the run loader
  fRunLoader = AliRunLoader::Open(chLoader);
  if (!fRunLoader) {
    AliError(Form("no run loader found in file %s","galice.root" ));
    return;
  }
  // initialize loader's
  AliLoader *loader = fRunLoader->GetLoader("MUONLoader");

  // initialize container
  fMUONData  = new AliMUONData(loader,"MUON","MUON");

   // Loading AliRun master
  if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();

  fRunLoader->LoadKinematics("READ");
  fRunLoader->LoadTrackRefs("READ");
  loader->LoadTracks("READ");

  fReconstructibleTracks = 0; 
  fRecoTracks = 0;
}

//_____________________________________________________________________________
AliMUONRecoCheck::~AliMUONRecoCheck()
{
  fRunLoader->UnloadKinematics();
  fRunLoader->UnloadTrackRefs();
  fRunLoader->UnloadTracks();
  fMuonTrackRef->Delete();
  delete fMuonTrackRef;
  delete fMUONData;
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeTrackRef()
{
  // Make reconstructible tracks

  AliTrackReference *trackReference;
  AliMUONTrack *muonTrack;
  AliMUONTrackParam *trackParam;
  AliMUONHitForRec *hitForRec;
  Float_t x, y, z, pX, pY, pZ, pYZ;
  Int_t track, trackSave;
  TParticle *particle;   
  Float_t bendingSlope = 0;
  Float_t  nonBendingSlope = 0;
  Float_t inverseBendingMomentum = 0;
  
  TTree* treeTR = fRunLoader->TreeTR();
  if (treeTR == NULL) return;

  TBranch* branch = treeTR->GetBranch("MUON");
  if (branch == NULL) return;

  TClonesArray* trackRefs = 0;
  branch->SetAddress(&trackRefs);
  branch->SetAutoDelete(kTRUE);  

  Int_t nTrackRef = (Int_t)branch->GetEntries();
 
  track = trackSave = -999;
  Bool_t isNewTrack;
  Int_t iHitMin, iChamber;

  trackParam = new AliMUONTrackParam();
  hitForRec = new AliMUONHitForRec();
  muonTrack = new AliMUONTrack();

  for (Int_t iTrackRef  = 0; iTrackRef < nTrackRef; iTrackRef++) {
    branch->GetEntry(iTrackRef);
    
    iHitMin = 0;
    isNewTrack = kTRUE;
    
    if (!trackRefs->GetEntries()) continue; 

    while (isNewTrack) {
      
      for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) {
      
	trackReference = (AliTrackReference*)trackRefs->At(iHit);
	x = trackReference->X();
	y = trackReference->Y();
	z = trackReference->Z();
	pX = trackReference->Px();
	pY = trackReference->Py();
	pZ = trackReference->Pz();

	track = trackReference->GetTrack();

	if (track != trackSave && iHit != 0) {
	  iHitMin = iHit;
	  trackSave = track;
	  break;
	}

	// track parameters at hit
	trackParam->SetBendingCoor(y);
	trackParam->SetNonBendingCoor(x);
	trackParam->SetZ(z);
       
	if (TMath::Abs(pZ) > 0) {
	  bendingSlope = pY/pZ;
	  nonBendingSlope = pX/pZ;
	}
	pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
	if (pYZ >0) inverseBendingMomentum = 1/pYZ; 

	trackParam->SetBendingSlope(bendingSlope);
	trackParam->SetNonBendingSlope(nonBendingSlope);
	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);

	hitForRec->SetBendingCoor(y);
	hitForRec->SetNonBendingCoor(x);
	hitForRec->SetZ(z);
	hitForRec->SetBendingReso2(0.0); 
	hitForRec->SetNonBendingReso2(0.0);  
	iChamber = AliMUONConstants::ChamberNumber(z);
	hitForRec->SetChamberNumber(iChamber);

	muonTrack->AddTrackParamAtHit(trackParam);
	muonTrack->AddHitForRecAtHit(hitForRec);
	muonTrack->SetTrackID(track);
	
	trackSave = track;
	if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE;
      }
      
      // track parameters at vertex 
      particle = fRunLoader->GetHeader()->Stack()->Particle(muonTrack->GetTrackID());
      if (particle) {
	x = particle->Vx();
	y = particle->Vy();
	z = particle->Vz();
	pX = particle->Px();
	pY = particle->Py();
	pZ = particle->Pz();

	trackParam->SetBendingCoor(y);
	trackParam->SetNonBendingCoor(x);
	trackParam->SetZ(z);
	if (TMath::Abs(pZ) > 0) {
	  bendingSlope = pY/pZ;
	  nonBendingSlope = pX/pZ;
	}
	pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
	if (pYZ >0) inverseBendingMomentum = 1/pYZ;       
	trackParam->SetBendingSlope(bendingSlope);
	trackParam->SetNonBendingSlope(nonBendingSlope);
	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
      
	muonTrack->SetTrackParamAtVertex(trackParam);
      }
      
      AddMuonTrackReference(muonTrack);
      muonTrack->ResetTrackParamAtHit();
      muonTrack->ResetHitForRecAtHit();
      
    } // end while isNewTrack
    
  }
  
  CleanMuonTrackRef();
  
  ReconstructibleTracks();

  delete muonTrack;
  delete trackParam;
  delete hitForRec;

}

//____________________________________________________________________________
TClonesArray* AliMUONRecoCheck::GetTrackReco()
{
  // Return TClonesArray of reconstructed tracks

  GetMUONData()->ResetRecTracks();
  GetMUONData()->SetTreeAddress("RT");
  fTrackReco = GetMUONData()->RecTracks(); 
  GetMUONData()->GetRecTracks();
  fRecoTracks = fTrackReco->GetEntriesFast();
  return fTrackReco;
}
//_____________________________________________________________________________
void AliMUONRecoCheck::PrintEvent() const
{
  // debug facility

  AliMUONTrack *track;
  AliMUONHitForRec *hitForRec;
  TClonesArray *  hitForRecAtHit = 0;
  Float_t xRec,yRec,zRec;

  Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
  
  printf(" ******************************* \n");
  printf(" nb of tracks %d \n",nTrackRef);

  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    Int_t nTrackHits = hitForRecAtHit->GetEntriesFast();
    printf(" track number %d \n",index);
    for (Int_t iHit = 0; iHit < nTrackHits; iHit++){
      hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); 
      xRec  = hitForRec->GetNonBendingCoor();
      yRec  = hitForRec->GetBendingCoor();
      zRec  = hitForRec->GetZ();
      printf("  x,y,z: %f , %f , %f \n",xRec,yRec,zRec);
    }
  }
}

//_____________________________________________________________________________
void AliMUONRecoCheck::ResetTracks() const
{
  if (fMuonTrackRef) fMuonTrackRef->Clear();
}
//_____________________________________________________________________________
void AliMUONRecoCheck::CleanMuonTrackRef()
{
  // Re-calculate hits parameters because two AliTrackReferences are recorded for
  // each chamber (one when particle is entering + one when particle is leaving 
  // the sensitive volume) 

  Float_t maxGasGap = 1.; // cm 
  AliMUONTrack *track, *trackNew;
  AliMUONHitForRec *hitForRec, *hitForRec1, *hitForRec2;
  AliMUONTrackParam *trackParam, *trackParam1, *trackParam2, *trackParamAtVertex;
  TClonesArray *  hitForRecAtHit = 0;
  TClonesArray *  trackParamAtHit = 0;
  Float_t xRec,yRec,zRec;
  Float_t xRec1,yRec1,zRec1;
  Float_t xRec2,yRec2,zRec2;
  Float_t bendingSlope,nonBendingSlope,bendingMomentum;
  Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1;
  Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2;
  TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
  Int_t iHit1;
  Int_t iChamber = 0;
  Int_t nRec = 0;
  Int_t nTrackHits = 0;

  hitForRec = new AliMUONHitForRec();
  trackParam = new AliMUONTrackParam();
  trackNew = new AliMUONTrack();

  Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
  
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    trackParamAtHit = track->GetTrackParamAtHit();
    trackParamAtVertex = track->GetTrackParamAtVertex();
    nTrackHits = hitForRecAtHit->GetEntriesFast();
    iHit1 = 0;
    while (iHit1 < nTrackHits) {
      hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1); 
      trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1); 
      xRec1  = hitForRec1->GetNonBendingCoor();
      yRec1  = hitForRec1->GetBendingCoor();
      zRec1  = hitForRec1->GetZ();	
      xRec   = xRec1;
      yRec   = yRec1;
      zRec   = zRec1;
      bendingSlope1 = trackParam1->GetBendingSlope();
      nonBendingSlope1 = trackParam1->GetNonBendingSlope();
      bendingMomentum1 = 0;
      if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0)
	bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum();
      bendingSlope = bendingSlope1;
      nonBendingSlope = nonBendingSlope1;
      bendingMomentum = bendingMomentum1;
      nRec = 1;  
      for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2); 
	trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2); 
	xRec2  = hitForRec2->GetNonBendingCoor();
	yRec2  = hitForRec2->GetBendingCoor();
	zRec2  = hitForRec2->GetZ();	  
	bendingSlope2 = trackParam2->GetBendingSlope();
	nonBendingSlope2 = trackParam2->GetNonBendingSlope();
	bendingMomentum2 = 0;
	if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0)
	  bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum();
	
	if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) {
	  nRec++;
	  xRec += xRec2;
	  yRec += yRec2;
	  zRec += zRec2;
	  bendingSlope += bendingSlope2;
	  nonBendingSlope += nonBendingSlope2;
	  bendingMomentum += bendingMomentum2;
	  iHit1 = iHit2;
	}
	
      } // end iHit2
      xRec /= (Float_t)nRec;
      yRec /= (Float_t)nRec;
      zRec /= (Float_t)nRec;
      bendingSlope /= (Float_t)nRec;
      nonBendingSlope /= (Float_t)nRec;
      bendingMomentum /= (Float_t)nRec;
      
      hitForRec->SetNonBendingCoor(xRec);
      hitForRec->SetBendingCoor(yRec);
      hitForRec->SetZ(zRec);
      iChamber = AliMUONConstants::ChamberNumber(zRec);
      hitForRec->SetChamberNumber(iChamber);
      hitForRec->SetBendingReso2(0.0); 
      hitForRec->SetNonBendingReso2(0.0); 
      trackParam->SetNonBendingCoor(xRec);
      trackParam->SetBendingCoor(yRec);
      trackParam->SetZ(zRec);
      trackParam->SetNonBendingSlope(nonBendingSlope);
      trackParam->SetBendingSlope(bendingSlope);
      if (TMath::Abs(bendingMomentum) > 0)
	trackParam->SetInverseBendingMomentum(1./bendingMomentum);

      trackNew->AddHitForRecAtHit(hitForRec);
      trackNew->AddTrackParamAtHit(trackParam);
      
      iHit1++;
    } // end iHit1

    trackNew->SetTrackID(track->GetTrackID());
    trackNew->SetTrackParamAtVertex(trackParamAtVertex);
    {new ((*newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(*trackNew);}    
    trackNew->ResetHitForRecAtHit();
    trackNew->ResetTrackParamAtHit();
    
  } // end trackRef

  fMuonTrackRef->Clear();
  nTrackRef = newMuonTrackRef->GetEntriesFast();
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)newMuonTrackRef->At(index);
    AddMuonTrackReference(track);
  }
  

  delete trackNew;
  delete hitForRec;
  delete trackParam;
  newMuonTrackRef->Delete();
  delete newMuonTrackRef;
  
}

//_____________________________________________________________________________
void AliMUONRecoCheck::ReconstructibleTracks()
{
  // calculate the number of reconstructible tracks
  
  AliMUONTrack* track;
  TClonesArray* hitForRecAtHit = NULL;
  AliMUONHitForRec* hitForRec;
  Float_t zRec;
  Int_t nTrackRef, nTrackHits;
  Int_t isChamberInTrack[10];
  Int_t iChamber = 0;
  Bool_t isTrackOK = kTRUE;

  fReconstructibleTracks = 0;

  nTrackRef = fMuonTrackRef->GetEntriesFast();
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    nTrackHits = hitForRecAtHit->GetEntriesFast();
    for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0;
 
    for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) {
      hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); 
      zRec  = hitForRec->GetZ();
      iChamber = hitForRec->GetChamberNumber();
      if (iChamber < 0 || iChamber > 10) continue;
      isChamberInTrack[iChamber] = 1;
      
    }
    // track is reconstructible if the particle is crossing every tracking chambers
    isTrackOK = kTRUE;
    for (Int_t ch = 0; ch < 10; ch++) {
      if (!isChamberInTrack[ch]) isTrackOK = kFALSE;
    }    if (isTrackOK) fReconstructibleTracks++;
    if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks
  }
  fMuonTrackRef->Compress();
}
Commit	Line	Data
b8dc484b	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	//////////////////////////////////////////////////////////////////////////////////////
	17	//
	18	// Utility class to check the muon reconstruction. Reconstructed tracks are compared
	19	// to reference tracks. The reference tracks are built from AliTrackReference for the
	20	// hit in chamber (0..9) and from kinematics for the vertex parameters.
	21	//
	22	//////////////////////////////////////////////////////////////////////////////////////
	23
	24
	25	#include <TParticle.h>
	26
	27	#include "AliRun.h" // for gAlice
	28	#include "AliLog.h"
	29	#include "AliLoader.h"
	30	#include "AliRunLoader.h"
	31	#include "AliTrackReference.h"
	32	#include "AliHeader.h"
	33	#include "AliMC.h"
	34	#include "AliStack.h"
	35	#include "AliMUON.h"
	36	#include "AliMUONRecoCheck.h"
	37	#include "AliMUONTrack.h"
	38	#include "AliMUONData.h"
	39	#include "AliMUONChamber.h"
	40	#include "AliMUONConstants.h"
	41
	42	ClassImp(AliMUONRecoCheck)
	43
	44	//_____________________________________________________________________________
	45	AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader)
	46	{
	47	// Constructor
	48	fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
	49
	50	// open the run loader
	51	fRunLoader = AliRunLoader::Open(chLoader);
	52	if (!fRunLoader) {
	53	AliError(Form("no run loader found in file %s","galice.root" ));
	54	return;
	55	}
	56	// initialize loader's
	57	AliLoader *loader = fRunLoader->GetLoader("MUONLoader");
	58
	59	// initialize container
	60	fMUONData = new AliMUONData(loader,"MUON","MUON");
	61
	62	// Loading AliRun master
	63	if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
	64
65	fRunLoader->LoadKinematics("READ");
66	fRunLoader->LoadTrackRefs("READ");
67	loader->LoadTracks("READ");
68
69	fReconstructibleTracks = 0;
70	fRecoTracks = 0;
71	}
72
73	//_____________________________________________________________________________
74	AliMUONRecoCheck::~AliMUONRecoCheck()
75	{
76	fRunLoader->UnloadKinematics();
77	fRunLoader->UnloadTrackRefs();
78	fRunLoader->UnloadTracks();
29fc2c86	79	fMuonTrackRef->Delete();
b8dc484b	80	delete fMuonTrackRef;
	81	delete fMUONData;
	82	}
	83
	84	//_____________________________________________________________________________
	85	void AliMUONRecoCheck::MakeTrackRef()
	86	{
	87	// Make reconstructible tracks
	88
	89	AliTrackReference *trackReference;
	90	AliMUONTrack *muonTrack;
	91	AliMUONTrackParam *trackParam;
	92	AliMUONHitForRec *hitForRec;
	93	Float_t x, y, z, pX, pY, pZ, pYZ;
	94	Int_t track, trackSave;
	95	TParticle *particle;
	96	Float_t bendingSlope = 0;
	97	Float_t nonBendingSlope = 0;
	98	Float_t inverseBendingMomentum = 0;
	99
	100	TTree* treeTR = fRunLoader->TreeTR();
	101	if (treeTR == NULL) return;
	102
	103	TBranch* branch = treeTR->GetBranch("MUON");
	104	if (branch == NULL) return;
	105
de876dd1	106	TClonesArray* trackRefs = 0;
b8dc484b	107	branch->SetAddress(&trackRefs);
de876dd1	108	branch->SetAutoDelete(kTRUE);
b8dc484b	109
de876dd1	110	Int_t nTrackRef = (Int_t)branch->GetEntries();
b8dc484b	111
	112	track = trackSave = -999;
	113	Bool_t isNewTrack;
	114	Int_t iHitMin, iChamber;
	115
	116	trackParam = new AliMUONTrackParam();
	117	hitForRec = new AliMUONHitForRec();
	118	muonTrack = new AliMUONTrack();
	119
	120	for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; iTrackRef++) {
de876dd1	121	branch->GetEntry(iTrackRef);
b8dc484b	122
	123	iHitMin = 0;
	124	isNewTrack = kTRUE;
dba3c809	125
29fc2c86	126	if (!trackRefs->GetEntries()) continue;
b8dc484b	127
29fc2c86	128	while (isNewTrack) {
29fc2c86	129
b8dc484b	130	for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) {
	131
	132	trackReference = (AliTrackReference*)trackRefs->At(iHit);
	133	x = trackReference->X();
	134	y = trackReference->Y();
	135	z = trackReference->Z();
	136	pX = trackReference->Px();
	137	pY = trackReference->Py();
	138	pZ = trackReference->Pz();
	139
	140	track = trackReference->GetTrack();
	141
	142	if (track != trackSave && iHit != 0) {
	143	iHitMin = iHit;
	144	trackSave = track;
	145	break;
	146	}
	147
	148	// track parameters at hit
	149	trackParam->SetBendingCoor(y);
	150	trackParam->SetNonBendingCoor(x);
	151	trackParam->SetZ(z);
	152
	153	if (TMath::Abs(pZ) > 0) {
	154	bendingSlope = pY/pZ;
	155	nonBendingSlope = pX/pZ;
	156	}
	157	pYZ = TMath::Sqrt(pYpY+pZpZ);
	158	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	159
	160	trackParam->SetBendingSlope(bendingSlope);
	161	trackParam->SetNonBendingSlope(nonBendingSlope);
	162	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
	163
	164	hitForRec->SetBendingCoor(y);
	165	hitForRec->SetNonBendingCoor(x);
	166	hitForRec->SetZ(z);
	167	hitForRec->SetBendingReso2(0.0);
	168	hitForRec->SetNonBendingReso2(0.0);
29fc2c86	169	iChamber = AliMUONConstants::ChamberNumber(z);
b8dc484b	170	hitForRec->SetChamberNumber(iChamber);
	171
	172	muonTrack->AddTrackParamAtHit(trackParam);
	173	muonTrack->AddHitForRecAtHit(hitForRec);
	174	muonTrack->SetTrackID(track);
	175
	176	trackSave = track;
	177	if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE;
	178	}
	179
	180	// track parameters at vertex
	181	particle = fRunLoader->GetHeader()->Stack()->Particle(muonTrack->GetTrackID());
	182	if (particle) {
	183	x = particle->Vx();
	184	y = particle->Vy();
	185	z = particle->Vz();
	186	pX = particle->Px();
	187	pY = particle->Py();
	188	pZ = particle->Pz();
	189
	190	trackParam->SetBendingCoor(y);
	191	trackParam->SetNonBendingCoor(x);
	192	trackParam->SetZ(z);
	193	if (TMath::Abs(pZ) > 0) {
	194	bendingSlope = pY/pZ;
	195	nonBendingSlope = pX/pZ;
	196	}
	197	pYZ = TMath::Sqrt(pYpY+pZpZ);
	198	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	199	trackParam->SetBendingSlope(bendingSlope);
	200	trackParam->SetNonBendingSlope(nonBendingSlope);
	201	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
	202
	203	muonTrack->SetTrackParamAtVertex(trackParam);
	204	}
	205
	206	AddMuonTrackReference(muonTrack);
	207	muonTrack->ResetTrackParamAtHit();
	208	muonTrack->ResetHitForRecAtHit();
	209
	210	} // end while isNewTrack
	211
	212	}
	213
	214	CleanMuonTrackRef();
	215
	216	ReconstructibleTracks();
	217
	218	delete muonTrack;
	219	delete trackParam;
	220	delete hitForRec;
b8dc484b	221
	222	}
	223
	224	//____________________________________________________________________________
	225	TClonesArray* AliMUONRecoCheck::GetTrackReco()
	226	{
	227	// Return TClonesArray of reconstructed tracks
	228
29fc2c86	229	GetMUONData()->ResetRecTracks();
b8dc484b	230	GetMUONData()->SetTreeAddress("RT");
	231	fTrackReco = GetMUONData()->RecTracks();
	232	GetMUONData()->GetRecTracks();
	233	fRecoTracks = fTrackReco->GetEntriesFast();
	234	return fTrackReco;
	235	}
	236	//_____________________________________________________________________________
	237	void AliMUONRecoCheck::PrintEvent() const
	238	{
	239	// debug facility
	240
	241	AliMUONTrack *track;
	242	AliMUONHitForRec *hitForRec;
	243	TClonesArray * hitForRecAtHit = 0;
	244	Float_t xRec,yRec,zRec;
	245
	246	Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
	247
	248	printf(" ******************************* \n");
	249	printf(" nb of tracks %d \n",nTrackRef);
	250
	251	for (Int_t index = 0; index < nTrackRef; index++) {
	252	track = (AliMUONTrack*)fMuonTrackRef->At(index);
	253	hitForRecAtHit = track->GetHitForRecAtHit();
	254	Int_t nTrackHits = hitForRecAtHit->GetEntriesFast();
	255	printf(" track number %d \n",index);
	256	for (Int_t iHit = 0; iHit < nTrackHits; iHit++){
	257	hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
	258	xRec = hitForRec->GetNonBendingCoor();
	259	yRec = hitForRec->GetBendingCoor();
	260	zRec = hitForRec->GetZ();
	261	printf(" x,y,z: %f , %f , %f \n",xRec,yRec,zRec);
	262	}
	263	}
	264	}
	265
	266	//_____________________________________________________________________________
	267	void AliMUONRecoCheck::ResetTracks() const
	268	{
	269	if (fMuonTrackRef) fMuonTrackRef->Clear();
	270	}
	271	//_____________________________________________________________________________
	272	void AliMUONRecoCheck::CleanMuonTrackRef()
	273	{
	274	// Re-calculate hits parameters because two AliTrackReferences are recorded for
	275	// each chamber (one when particle is entering + one when particle is leaving
	276	// the sensitive volume)
	277
	278	Float_t maxGasGap = 1.; // cm
	279	AliMUONTrack track, trackNew;
	280	AliMUONHitForRec hitForRec, hitForRec1, *hitForRec2;
	281	AliMUONTrackParam trackParam, trackParam1, trackParam2, trackParamAtVertex;
	282	TClonesArray * hitForRecAtHit = 0;
	283	TClonesArray * trackParamAtHit = 0;
	284	Float_t xRec,yRec,zRec;
	285	Float_t xRec1,yRec1,zRec1;
	286	Float_t xRec2,yRec2,zRec2;
	287	Float_t bendingSlope,nonBendingSlope,bendingMomentum;
	288	Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1;
	289	Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2;
	290	TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
	291	Int_t iHit1;
	292	Int_t iChamber = 0;
	293	Int_t nRec = 0;
294	Int_t nTrackHits = 0;
295
296	hitForRec = new AliMUONHitForRec();
297	trackParam = new AliMUONTrackParam();
298	trackNew = new AliMUONTrack();
299
300	Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
301
302	for (Int_t index = 0; index < nTrackRef; index++) {
303	track = (AliMUONTrack*)fMuonTrackRef->At(index);
304	hitForRecAtHit = track->GetHitForRecAtHit();
305	trackParamAtHit = track->GetTrackParamAtHit();
306	trackParamAtVertex = track->GetTrackParamAtVertex();
307	nTrackHits = hitForRecAtHit->GetEntriesFast();
308	iHit1 = 0;
309	while (iHit1 < nTrackHits) {
310	hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1);
311	trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1);
312	xRec1 = hitForRec1->GetNonBendingCoor();
313	yRec1 = hitForRec1->GetBendingCoor();
314	zRec1 = hitForRec1->GetZ();
315	xRec = xRec1;
316	yRec = yRec1;
317	zRec = zRec1;
318	bendingSlope1 = trackParam1->GetBendingSlope();
319	nonBendingSlope1 = trackParam1->GetNonBendingSlope();
de876dd1	320	bendingMomentum1 = 0;
	321	if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0)
	322	bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum();
b8dc484b	323	bendingSlope = bendingSlope1;
	324	nonBendingSlope = nonBendingSlope1;
	325	bendingMomentum = bendingMomentum1;
	326	nRec = 1;
	327	for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	328	hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2);
	329	trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2);
	330	xRec2 = hitForRec2->GetNonBendingCoor();
	331	yRec2 = hitForRec2->GetBendingCoor();
	332	zRec2 = hitForRec2->GetZ();
	333	bendingSlope2 = trackParam2->GetBendingSlope();
	334	nonBendingSlope2 = trackParam2->GetNonBendingSlope();
de876dd1	335	bendingMomentum2 = 0;
	336	if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0)
	337	bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum();
b8dc484b	338
	339	if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) {
	340	nRec++;
	341	xRec += xRec2;
	342	yRec += yRec2;
	343	zRec += zRec2;
	344	bendingSlope += bendingSlope2;
	345	nonBendingSlope += nonBendingSlope2;
	346	bendingMomentum += bendingMomentum2;
	347	iHit1 = iHit2;
	348	}
	349
	350	} // end iHit2
	351	xRec /= (Float_t)nRec;
	352	yRec /= (Float_t)nRec;
	353	zRec /= (Float_t)nRec;
	354	bendingSlope /= (Float_t)nRec;
	355	nonBendingSlope /= (Float_t)nRec;
	356	bendingMomentum /= (Float_t)nRec;
	357
	358	hitForRec->SetNonBendingCoor(xRec);
	359	hitForRec->SetBendingCoor(yRec);
	360	hitForRec->SetZ(zRec);
29fc2c86	361	iChamber = AliMUONConstants::ChamberNumber(zRec);
b8dc484b	362	hitForRec->SetChamberNumber(iChamber);
	363	hitForRec->SetBendingReso2(0.0);
	364	hitForRec->SetNonBendingReso2(0.0);
	365	trackParam->SetNonBendingCoor(xRec);
	366	trackParam->SetBendingCoor(yRec);
	367	trackParam->SetZ(zRec);
	368	trackParam->SetNonBendingSlope(nonBendingSlope);
	369	trackParam->SetBendingSlope(bendingSlope);
de876dd1	370	if (TMath::Abs(bendingMomentum) > 0)
de876dd1	371	trackParam->SetInverseBendingMomentum(1./bendingMomentum);
b8dc484b	372
	373	trackNew->AddHitForRecAtHit(hitForRec);
	374	trackNew->AddTrackParamAtHit(trackParam);
	375
	376	iHit1++;
	377	} // end iHit1
	378
	379	trackNew->SetTrackID(track->GetTrackID());
	380	trackNew->SetTrackParamAtVertex(trackParamAtVertex);
	381	{new ((newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(trackNew);}
	382	trackNew->ResetHitForRecAtHit();
	383	trackNew->ResetTrackParamAtHit();
	384
	385	} // end trackRef
	386
	387	fMuonTrackRef->Clear();
	388	nTrackRef = newMuonTrackRef->GetEntriesFast();
	389	for (Int_t index = 0; index < nTrackRef; index++) {
	390	track = (AliMUONTrack*)newMuonTrackRef->At(index);
	391	AddMuonTrackReference(track);
	392	}
	393
	394
	395	delete trackNew;
	396	delete hitForRec;
	397	delete trackParam;
29fc2c86	398	newMuonTrackRef->Delete();
b8dc484b	399	delete newMuonTrackRef;
	400
	401	}
	402
	403	//_____________________________________________________________________________
	404	void AliMUONRecoCheck::ReconstructibleTracks()
	405	{
	406	// calculate the number of reconstructible tracks
	407
	408	AliMUONTrack* track;
	409	TClonesArray* hitForRecAtHit = NULL;
	410	AliMUONHitForRec* hitForRec;
	411	Float_t zRec;
	412	Int_t nTrackRef, nTrackHits;
	413	Int_t isChamberInTrack[10];
	414	Int_t iChamber = 0;
	415	Bool_t isTrackOK = kTRUE;
	416
	417	fReconstructibleTracks = 0;
	418
	419	nTrackRef = fMuonTrackRef->GetEntriesFast();
	420	for (Int_t index = 0; index < nTrackRef; index++) {
	421	track = (AliMUONTrack*)fMuonTrackRef->At(index);
	422	hitForRecAtHit = track->GetHitForRecAtHit();
	423	nTrackHits = hitForRecAtHit->GetEntriesFast();
	424	for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0;
	425
	426	for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) {
	427	hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
	428	zRec = hitForRec->GetZ();
	429	iChamber = hitForRec->GetChamberNumber();
	430	if (iChamber < 0 \|\| iChamber > 10) continue;
	431	isChamberInTrack[iChamber] = 1;
	432
	433	}
	434	// track is reconstructible if the particle is crossing every tracking chambers
	435	isTrackOK = kTRUE;
	436	for (Int_t ch = 0; ch < 10; ch++) {
	437	if (!isChamberInTrack[ch]) isTrackOK = kFALSE;
29fc2c86	438	} if (isTrackOK) fReconstructibleTracks++;
b8dc484b	439	if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks
	440	}
	441	fMuonTrackRef->Compress();
	442	}
	443
	444