[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.                  *
**************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------------------
/// \class AliMUONRecoCheck
/// Utility class to check 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.     
//-----------------------------------------------------------------------------

// 13 Nov 2007:
// Added a method to create a list of reconstructed AliMUONTrack objects from
// ESD data. This is necessary since the track objects that are actually created
// during offline reconstruction are no longer stored to disk.
//  - Artur Szostak <artursz@iafrica.com>
// 25 Jan 2008:
// Use the new ESDInterface to create MUON objects from ESD data
// - Philippe Pillot

#include "AliMUONRecoCheck.h"
#include "AliMUONTrack.h"
#include "AliMUONVTrackStore.h"
#include "AliMUONVCluster.h"
#include "AliMUONVClusterStore.h"
#include "AliMUONConstants.h"
#include "AliMUONESDInterface.h"

#include "AliMCEventHandler.h"
#include "AliMCEvent.h"
#include "AliStack.h"
#include "AliTrackReference.h"
#include "AliLog.h"
#include "AliESDEvent.h"
#include "AliESDMuonTrack.h"

#include <TFile.h>
#include <TTree.h>
#include <TParticle.h>
#include <TParticlePDG.h>
#include <Riostream.h>

/// \cond CLASSIMP
ClassImp(AliMUONRecoCheck)
/// \endcond

//_____________________________________________________________________________
AliMUONRecoCheck::AliMUONRecoCheck(Char_t *esdFileName, Char_t *pathSim)
: TObject(),
fMCEventHandler(new AliMCEventHandler()),
fESDEvent(new AliESDEvent()),
fESDTree (0x0),
fESDFile (0x0),
fCurrentEvent(0),
fTrackRefStore(0x0),
fRecoTrackRefStore(0x0),
fRecoTrackStore(0x0)
{
  /// Normal ctor
  
  // TrackRefs and Particules
  fMCEventHandler->SetInputPath(pathSim);
  fMCEventHandler->InitIO("");
  
  // ESD MUON Tracks
  fESDFile = TFile::Open(esdFileName); // open the file
  if (!fESDFile || !fESDFile->IsOpen()) {
    AliError(Form("opening ESD file %s failed", esdFileName));
    fESDFile = 0x0;
    return;
  }
  fESDTree = (TTree*) fESDFile->Get("esdTree"); // get the tree
  if (!fESDTree) {
    AliError("no ESD tree found");
    fESDFile->Close();
    fESDFile = 0x0;
    return;
  }
  fESDEvent->ReadFromTree(fESDTree); // link fESDEvent to the tree
}

//_____________________________________________________________________________
AliMUONRecoCheck::~AliMUONRecoCheck()
{
  /// Destructor
  delete fMCEventHandler;
  delete fESDEvent;
  if (fESDFile) fESDFile->Close();
  ResetStores();
}

//_____________________________________________________________________________
void AliMUONRecoCheck::ResetStores()
{
  /// Deletes all the store objects that have been created and resets the pointers to 0x0
  delete fTrackRefStore;      fTrackRefStore = 0x0;
  delete fRecoTrackRefStore;  fRecoTrackRefStore = 0x0;
  delete fRecoTrackStore;     fRecoTrackStore = 0x0;
}

//_____________________________________________________________________________
Int_t AliMUONRecoCheck::NumberOfEvents() const
{
  /// Return the number of events
  if (fESDTree) return fESDTree->GetEntries();
  return 0;
}

//_____________________________________________________________________________
AliMUONVTrackStore* AliMUONRecoCheck::ReconstructedTracks(Int_t event)
{
  /// Return a track store containing the reconstructed tracks (converted into 
  /// MUONTrack objects) for a given event
  if (event != fCurrentEvent) {
    ResetStores();
    fCurrentEvent = event;
  }
  
  if (fRecoTrackStore != 0x0) return fRecoTrackStore;
  else {
    if (!fESDTree) return 0x0;
    if (fESDTree->GetEvent(event) <= 0) {
      AliError(Form("fails to read ESD object for event %d", event));
      return 0x0;
    }
    MakeReconstructedTracks();
    return fRecoTrackStore;
  }
}

//_____________________________________________________________________________
AliMUONVTrackStore* AliMUONRecoCheck::TrackRefs(Int_t event)
{
  /// Return a track store containing the track references (converted into 
  /// MUONTrack objects) for a given event
  if (event != fCurrentEvent) {
    ResetStores();
    fCurrentEvent = event;
  }
  
  if (fTrackRefStore != 0x0) return fTrackRefStore;
  else {
    if (!fMCEventHandler->GetEvent(event)) {
      AliError(Form("fails to read MC objects for event %d", event));
      return 0x0;
    }
    MakeTrackRefs();
    return fTrackRefStore;
  }
}

//_____________________________________________________________________________
AliMUONVTrackStore* AliMUONRecoCheck::ReconstructibleTracks(Int_t event)
{
  /// Return a track store containing the reconstructible tracks for a given event
  if (event != fCurrentEvent) {
    ResetStores();
    fCurrentEvent = event;
  }
  
  if (fRecoTrackRefStore != 0x0) return fRecoTrackRefStore;
  else {
    if (TrackRefs(event) == 0x0) return 0x0;
    MakeReconstructibleTracks();
    return fRecoTrackRefStore;
  }
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeReconstructedTracks()
{
  /// Make reconstructed tracks
  if (!(fRecoTrackStore = AliMUONESDInterface::NewTrackStore())) return;
  
  // loop over all reconstructed tracks and add them to the store (skip ghosts)
  Int_t nTracks = (Int_t) fESDEvent->GetNumberOfMuonTracks();
  for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
    AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
    if (esdTrack->ContainTrackerData()) AliMUONESDInterface::Add(*esdTrack, *fRecoTrackStore);
  }
  
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeTrackRefs()
{
  /// Make reconstructible tracks
  AliMUONVTrackStore *tmpTrackRefStore = AliMUONESDInterface::NewTrackStore();
  if (!tmpTrackRefStore) return;
  
  Double_t x, y, z, pX, pY, pZ, bendingSlope, nonBendingSlope, inverseBendingMomentum;
  TParticle* particle;
  TClonesArray* trackRefs;
  Int_t nTrackRef = fMCEventHandler->MCEvent()->GetNumberOfTracks();
  AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
  if (!cStore) return;
  AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
  
  // loop over simulated tracks
  for (Int_t iTrackRef  = 0; iTrackRef < nTrackRef; ++iTrackRef) {
    Int_t nHits = fMCEventHandler->GetParticleAndTR(iTrackRef, particle, trackRefs);
    
    // skip empty trackRefs
    if (nHits < 1) continue;
    
    // get the particle charge for further calculation
    TParticlePDG* ppdg = particle->GetPDG();
    Int_t charge = (Int_t)(ppdg->Charge()/3.0);
    
    AliMUONTrack track;
    
    // loop over simulated track hits
    for (Int_t iHit = 0; iHit < nHits; ++iHit) {        
      AliTrackReference* trackReference = static_cast<AliTrackReference*>(trackRefs->UncheckedAt(iHit));
      
      // skip trackRefs not in MUON
      if (trackReference->DetectorId() != AliTrackReference::kMUON) continue;
    
      // Get track parameters of current hit
      x = trackReference->X();
      y = trackReference->Y();
      z = trackReference->Z();
      pX = trackReference->Px();
      pY = trackReference->Py();
      pZ = trackReference->Pz();
      
      // check chamberId of current trackReference
      Int_t chamberId = AliMUONConstants::ChamberNumber(z);
      if (chamberId < 0 || chamberId >= AliMUONConstants::NTrackingCh()) continue;
      
      // set hit parameters
      hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(chamberId, 0, 0));
      hit->SetXYZ(x,y,z);
      hit->SetErrXY(0.,0.);
      
      // compute track parameters at hit
      bendingSlope = 0;
      nonBendingSlope = 0;
      inverseBendingMomentum = 0;
      if (TMath::Abs(pZ) > 0) {
	bendingSlope = pY/pZ;
	nonBendingSlope = pX/pZ;
      }
      Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
      if (pYZ >0) inverseBendingMomentum = 1/pYZ; 
      inverseBendingMomentum *= charge;
      
      // set track parameters at hit
      AliMUONTrackParam trackParam;
      trackParam.SetNonBendingCoor(x);
      trackParam.SetBendingCoor(y);
      trackParam.SetZ(z);
      trackParam.SetBendingSlope(bendingSlope);
      trackParam.SetNonBendingSlope(nonBendingSlope);
      trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
      
      // add track parameters at current hit to the track
      track.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
    }
    
    // if none of the track hits was in MUON, goto the next track
    if (track.GetNClusters() < 1) continue;
    
    // get track parameters at particle's vertex
    x = particle->Vx();
    y = particle->Vy();
    z = particle->Vz();
    pX = particle->Px();
    pY = particle->Py();
    pZ = particle->Pz();
    
    // compute rest of track parameters at particle's vertex
    bendingSlope = 0;
    nonBendingSlope = 0;
    inverseBendingMomentum = 0;
    if (TMath::Abs(pZ) > 0) {
      bendingSlope = pY/pZ;
      nonBendingSlope = pX/pZ;
    }
    Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
    if (pYZ >0) inverseBendingMomentum = 1/pYZ;
    inverseBendingMomentum *= charge;
    
    // set track parameters at particle's vertex
    AliMUONTrackParam trackParamAtVertex;
    trackParamAtVertex.SetNonBendingCoor(x);
    trackParamAtVertex.SetBendingCoor(y);
    trackParamAtVertex.SetZ(z);
    trackParamAtVertex.SetBendingSlope(bendingSlope);
    trackParamAtVertex.SetNonBendingSlope(nonBendingSlope);
    trackParamAtVertex.SetInverseBendingMomentum(inverseBendingMomentum);
    
    // add track parameters at vertex
    track.SetTrackParamAtVertex(&trackParamAtVertex);
    
    // store the track
    track.SetTrackID(iTrackRef);
    tmpTrackRefStore->Add(track);
  }
  
  CleanMuonTrackRef(tmpTrackRefStore);
  
  delete hit;
  delete cStore;
  delete tmpTrackRefStore;
}

//_____________________________________________________________________________
void AliMUONRecoCheck::CleanMuonTrackRef(const AliMUONVTrackStore *tmpTrackRefStore)
{
  /// 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) 
  if (!(fTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
  
  Double_t maxGasGap = 1.; // cm 
  Double_t x, y, z, pX, pY, pZ, x1, y1, z1, pX1, pY1, pZ1, z2;
  Double_t bendingSlope,nonBendingSlope,inverseBendingMomentum;
  AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
  if (!cStore) return;
  AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
  
  // create iterator
  TIter next(tmpTrackRefStore->CreateIterator());
  
  // loop over tmpTrackRef
  AliMUONTrack* track;
  while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
    
    AliMUONTrack newTrack;
    
    // loop over tmpTrackRef's hits
    Int_t iHit1 = 0;
    Int_t nTrackHits = track->GetNClusters();
    while (iHit1 < nTrackHits) {
      AliMUONTrackParam *trackParam1 = (AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit1);
      
      // get track parameters at hit1
      x1  = trackParam1->GetNonBendingCoor();
      y1  = trackParam1->GetBendingCoor();
      z1  = trackParam1->GetZ();
      pX1 = trackParam1->Px();
      pY1 = trackParam1->Py();
      pZ1 = trackParam1->Pz();
      
      // prepare new track parameters
      x  = x1;
      y  = y1;
      z  = z1;
      pX = pX1;
      pY = pY1;
      pZ = pZ1;
      
      // loop over next tmpTrackRef's hits
      Int_t nCombinedHits = 1;
      for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	AliMUONTrackParam *trackParam2 = (AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit2);
        
	// get z position of hit2
	z2 = trackParam2->GetZ();
	
	// complete new track parameters if hit2 is on the same detection element
        if ( TMath::Abs(z2-z1) < maxGasGap ) {
	  x  += trackParam2->GetNonBendingCoor();
	  y  += trackParam2->GetBendingCoor();
	  z  += z2;
	  pX += trackParam2->Px();
	  pY += trackParam2->Py();
	  pZ += trackParam2->Pz();
	  nCombinedHits++;
          iHit1 = iHit2;
        }
        
      }
      
      // finalize new track parameters
      x  /= (Double_t)nCombinedHits;
      y  /= (Double_t)nCombinedHits;
      z  /= (Double_t)nCombinedHits;
      pX /= (Double_t)nCombinedHits;
      pY /= (Double_t)nCombinedHits;
      pZ /= (Double_t)nCombinedHits;
      bendingSlope = 0;
      nonBendingSlope = 0;
      inverseBendingMomentum = 0;
      if (TMath::Abs(pZ) > 0) {
	bendingSlope = pY/pZ;
	nonBendingSlope = pX/pZ;
      }
      Double_t pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
      if (pYZ >0) inverseBendingMomentum = 1/pYZ; 
      inverseBendingMomentum *= trackParam1->GetCharge();
      
      // set hit parameters
      hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(trackParam1->GetClusterPtr()->GetChamberId(), 0, 0));
      hit->SetXYZ(x,y,z);
      hit->SetErrXY(0.,0.);
      
      // set new track parameters at new hit
      AliMUONTrackParam trackParam;
      trackParam.SetNonBendingCoor(x);
      trackParam.SetBendingCoor(y);
      trackParam.SetZ(z);
      trackParam.SetBendingSlope(bendingSlope);
      trackParam.SetNonBendingSlope(nonBendingSlope);
      trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
      
      // add track parameters at current hit to the track
      newTrack.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
      
      iHit1++;
    }
    
    newTrack.SetTrackID(track->GetTrackID());
    newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
    fTrackRefStore->Add(newTrack);
    
  }
  
  delete hit;
  delete cStore;
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeReconstructibleTracks()
{
  /// Isolate the reconstructible tracks
  if (!(fRecoTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
  
  // create iterator on trackRef
  TIter next(fTrackRefStore->CreateIterator());
  
  // loop over trackRef
  AliMUONTrack* track;
  while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
    
    Bool_t* chamberInTrack = new Bool_t(AliMUONConstants::NTrackingCh());
    for (Int_t iCh = 0; iCh < AliMUONConstants::NTrackingCh(); iCh++) chamberInTrack[iCh] = kFALSE;
    
    // loop over trackRef's hits to get hit chambers
    Int_t nTrackHits = track->GetNClusters();
    for (Int_t iHit = 0; iHit < nTrackHits; iHit++) {
      AliMUONVCluster* hit = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit))->GetClusterPtr(); 
      chamberInTrack[hit->GetChamberId()] = kTRUE;
    } 
    
    // track is reconstructible if the particle is depositing a hit
    // in the following chamber combinations:
    Bool_t trackOK = kTRUE;
    if (!chamberInTrack[0] && !chamberInTrack[1]) trackOK = kFALSE;
    if (!chamberInTrack[2] && !chamberInTrack[3]) trackOK = kFALSE;
    if (!chamberInTrack[4] && !chamberInTrack[5]) trackOK = kFALSE;
    Int_t nHitsInLastStations = 0;
    for (Int_t iCh = 6; iCh < AliMUONConstants::NTrackingCh(); iCh++)
      if (chamberInTrack[iCh]) nHitsInLastStations++; 
    if(nHitsInLastStations < 3) trackOK = kFALSE;
    
    // Add reconstructible tracks to fRecoTrackRefStore
    if (trackOK) fRecoTrackRefStore->Add(*track);
    
    delete [] chamberInTrack;
  }

}
Commit	Line	Data
b8dc484b	1	/**************************************************************************
48217459	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	**************************************************************************/
b8dc484b	15
d19b6003	16	/* $Id$ */
d19b6003	17
3d1463c8	18	//-----------------------------------------------------------------------------
5398f946	19	/// \class AliMUONRecoCheck
78649106	20	/// Utility class to check reconstruction
5398f946	21	/// Reconstructed tracks are compared to reference tracks.
	22	/// The reference tracks are built from AliTrackReference for the
	23	/// hit in chamber (0..9) and from kinematics for the vertex parameters.
3d1463c8	24	//-----------------------------------------------------------------------------
b8dc484b	25
9bdda5f6	26	// 13 Nov 2007:
	27	// Added a method to create a list of reconstructed AliMUONTrack objects from
	28	// ESD data. This is necessary since the track objects that are actually created
	29	// during offline reconstruction are no longer stored to disk.
	30	// - Artur Szostak <artursz@iafrica.com>
103e6575	31	// 25 Jan 2008:
	32	// Use the new ESDInterface to create MUON objects from ESD data
	33	// - Philippe Pillot
9bdda5f6	34
cc056de1	35	#include "AliMUONRecoCheck.h"
cc056de1	36	#include "AliMUONTrack.h"
103e6575	37	#include "AliMUONVTrackStore.h"
	38	#include "AliMUONVCluster.h"
	39	#include "AliMUONVClusterStore.h"
cc056de1	40	#include "AliMUONConstants.h"
103e6575	41	#include "AliMUONESDInterface.h"
96ebe67e	42
	43	#include "AliMCEventHandler.h"
	44	#include "AliMCEvent.h"
b8dc484b	45	#include "AliStack.h"
cc056de1	46	#include "AliTrackReference.h"
9bdda5f6	47	#include "AliLog.h"
	48	#include "AliESDEvent.h"
	49	#include "AliESDMuonTrack.h"
96ebe67e	50
61fed964	51	#include <TFile.h>
61fed964	52	#include <TTree.h>
cc056de1	53	#include <TParticle.h>
5b1afea0	54	#include <TParticlePDG.h>
96ebe67e	55	#include <Riostream.h>
96ebe67e	56
5398f946	57	/// \cond CLASSIMP
b8dc484b	58	ClassImp(AliMUONRecoCheck)
5398f946	59	/// \endcond
b8dc484b	60
068e4c36	61	//_____________________________________________________________________________
61fed964	62	AliMUONRecoCheck::AliMUONRecoCheck(Char_t esdFileName, Char_t pathSim)
48217459	63	: TObject(),
96ebe67e	64	fMCEventHandler(new AliMCEventHandler()),
61fed964	65	fESDEvent(new AliESDEvent()),
	66	fESDTree (0x0),
	67	fESDFile (0x0),
96ebe67e	68	fCurrentEvent(0),
	69	fTrackRefStore(0x0),
	70	fRecoTrackRefStore(0x0),
	71	fRecoTrackStore(0x0)
068e4c36	72	{
48217459	73	/// Normal ctor
61fed964	74
61fed964	75	// TrackRefs and Particules
96ebe67e	76	fMCEventHandler->SetInputPath(pathSim);
96ebe67e	77	fMCEventHandler->InitIO("");
61fed964	78
	79	// ESD MUON Tracks
	80	fESDFile = TFile::Open(esdFileName); // open the file
	81	if (!fESDFile \|\| !fESDFile->IsOpen()) {
	82	AliError(Form("opening ESD file %s failed", esdFileName));
	83	fESDFile = 0x0;
	84	return;
	85	}
	86	fESDTree = (TTree*) fESDFile->Get("esdTree"); // get the tree
	87	if (!fESDTree) {
	88	AliError("no ESD tree found");
	89	fESDFile->Close();
	90	fESDFile = 0x0;
	91	return;
	92	}
	93	fESDEvent->ReadFromTree(fESDTree); // link fESDEvent to the tree
068e4c36	94	}
068e4c36	95
b8dc484b	96	//_____________________________________________________________________________
48217459	97	AliMUONRecoCheck::~AliMUONRecoCheck()
b8dc484b	98	{
48217459	99	/// Destructor
96ebe67e	100	delete fMCEventHandler;
61fed964	101	delete fESDEvent;
61fed964	102	if (fESDFile) fESDFile->Close();
96ebe67e	103	ResetStores();
	104	}
	105
	106	//_____________________________________________________________________________
	107	void AliMUONRecoCheck::ResetStores()
	108	{
	109	/// Deletes all the store objects that have been created and resets the pointers to 0x0
	110	delete fTrackRefStore; fTrackRefStore = 0x0;
	111	delete fRecoTrackRefStore; fRecoTrackRefStore = 0x0;
	112	delete fRecoTrackStore; fRecoTrackStore = 0x0;
	113	}
	114
	115	//_____________________________________________________________________________
	116	Int_t AliMUONRecoCheck::NumberOfEvents() const
	117	{
	118	/// Return the number of events
61fed964	119	if (fESDTree) return fESDTree->GetEntries();
96ebe67e	120	return 0;
b8dc484b	121	}
b8dc484b	122
48217459	123	//_____________________________________________________________________________
96ebe67e	124	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructedTracks(Int_t event)
48217459	125	{
61fed964	126	/// Return a track store containing the reconstructed tracks (converted into
61fed964	127	/// MUONTrack objects) for a given event
96ebe67e	128	if (event != fCurrentEvent) {
	129	ResetStores();
	130	fCurrentEvent = event;
	131	}
	132
	133	if (fRecoTrackStore != 0x0) return fRecoTrackStore;
61fed964	134	else {
	135	if (!fESDTree) return 0x0;
	136	if (fESDTree->GetEvent(event) <= 0) {
	137	AliError(Form("fails to read ESD object for event %d", event));
	138	return 0x0;
9bdda5f6	139	}
61fed964	140	MakeReconstructedTracks();
61fed964	141	return fRecoTrackStore;
9bdda5f6	142	}
9bdda5f6	143	}
	144
	145	//_____________________________________________________________________________
96ebe67e	146	AliMUONVTrackStore* AliMUONRecoCheck::TrackRefs(Int_t event)
b8dc484b	147	{
48217459	148	/// Return a track store containing the track references (converted into
48217459	149	/// MUONTrack objects) for a given event
96ebe67e	150	if (event != fCurrentEvent) {
	151	ResetStores();
	152	fCurrentEvent = event;
	153	}
	154
	155	if (fTrackRefStore != 0x0) return fTrackRefStore;
	156	else {
61fed964	157	if (!fMCEventHandler->GetEvent(event)) {
	158	AliError(Form("fails to read MC objects for event %d", event));
	159	return 0x0;
	160	}
96ebe67e	161	MakeTrackRefs();
	162	return fTrackRefStore;
	163	}
b8dc484b	164	}
	165
	166	//_____________________________________________________________________________
96ebe67e	167	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructibleTracks(Int_t event)
b8dc484b	168	{
48217459	169	/// Return a track store containing the reconstructible tracks for a given event
96ebe67e	170	if (event != fCurrentEvent) {
	171	ResetStores();
	172	fCurrentEvent = event;
	173	}
	174
	175	if (fRecoTrackRefStore != 0x0) return fRecoTrackRefStore;
	176	else {
	177	if (TrackRefs(event) == 0x0) return 0x0;
	178	MakeReconstructibleTracks();
	179	return fRecoTrackRefStore;
	180	}
48217459	181	}
b8dc484b	182
61fed964	183	//_____________________________________________________________________________
	184	void AliMUONRecoCheck::MakeReconstructedTracks()
	185	{
	186	/// Make reconstructed tracks
103e6575	187	if (!(fRecoTrackStore = AliMUONESDInterface::NewTrackStore())) return;
61fed964	188
b1fea02e	189	// loop over all reconstructed tracks and add them to the store (skip ghosts)
103e6575	190	Int_t nTracks = (Int_t) fESDEvent->GetNumberOfMuonTracks();
b1fea02e	191	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	192	AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
	193	if (esdTrack->ContainTrackerData()) AliMUONESDInterface::Add(esdTrack, fRecoTrackStore);
	194	}
61fed964	195
	196	}
	197
48217459	198	//_____________________________________________________________________________
96ebe67e	199	void AliMUONRecoCheck::MakeTrackRefs()
48217459	200	{
48217459	201	/// Make reconstructible tracks
103e6575	202	AliMUONVTrackStore *tmpTrackRefStore = AliMUONESDInterface::NewTrackStore();
103e6575	203	if (!tmpTrackRefStore) return;
48217459	204
96ebe67e	205	Double_t x, y, z, pX, pY, pZ, bendingSlope, nonBendingSlope, inverseBendingMomentum;
	206	TParticle* particle;
	207	TClonesArray* trackRefs;
	208	Int_t nTrackRef = fMCEventHandler->MCEvent()->GetNumberOfTracks();
103e6575	209	AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
	210	if (!cStore) return;
	211	AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
b8dc484b	212
96ebe67e	213	// loop over simulated tracks
	214	for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; ++iTrackRef) {
	215	Int_t nHits = fMCEventHandler->GetParticleAndTR(iTrackRef, particle, trackRefs);
48217459	216
96ebe67e	217	// skip empty trackRefs
	218	if (nHits < 1) continue;
	219
61fed964	220	// get the particle charge for further calculation
61fed964	221	TParticlePDG* ppdg = particle->GetPDG();
96ebe67e	222	Int_t charge = (Int_t)(ppdg->Charge()/3.0);
96ebe67e	223
61fed964	224	AliMUONTrack track;
48217459	225
96ebe67e	226	// loop over simulated track hits
	227	for (Int_t iHit = 0; iHit < nHits; ++iHit) {
	228	AliTrackReference* trackReference = static_cast<AliTrackReference*>(trackRefs->UncheckedAt(iHit));
068e4c36	229
61fed964	230	// skip trackRefs not in MUON
	231	if (trackReference->DetectorId() != AliTrackReference::kMUON) continue;
	232
96ebe67e	233	// Get track parameters of current hit
	234	x = trackReference->X();
	235	y = trackReference->Y();
	236	z = trackReference->Z();
	237	pX = trackReference->Px();
	238	pY = trackReference->Py();
	239	pZ = trackReference->Pz();
b8dc484b	240
96ebe67e	241	// check chamberId of current trackReference
	242	Int_t chamberId = AliMUONConstants::ChamberNumber(z);
	243	if (chamberId < 0 \|\| chamberId >= AliMUONConstants::NTrackingCh()) continue;
48217459	244
96ebe67e	245	// set hit parameters
103e6575	246	hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(chamberId, 0, 0));
	247	hit->SetXYZ(x,y,z);
	248	hit->SetErrXY(0.,0.);
b8dc484b	249
96ebe67e	250	// compute track parameters at hit
7cdc832b	251	bendingSlope = 0;
	252	nonBendingSlope = 0;
	253	inverseBendingMomentum = 0;
96ebe67e	254	if (TMath::Abs(pZ) > 0) {
	255	bendingSlope = pY/pZ;
	256	nonBendingSlope = pX/pZ;
b8dc484b	257	}
96ebe67e	258	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	259	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	260	inverseBendingMomentum *= charge;
	261
	262	// set track parameters at hit
	263	AliMUONTrackParam trackParam;
	264	trackParam.SetNonBendingCoor(x);
	265	trackParam.SetBendingCoor(y);
	266	trackParam.SetZ(z);
	267	trackParam.SetBendingSlope(bendingSlope);
	268	trackParam.SetNonBendingSlope(nonBendingSlope);
	269	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	270
	271	// add track parameters at current hit to the track
103e6575	272	track.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
96ebe67e	273	}
96ebe67e	274
61fed964	275	// if none of the track hits was in MUON, goto the next track
	276	if (track.GetNClusters() < 1) continue;
	277
	278	// get track parameters at particle's vertex
	279	x = particle->Vx();
	280	y = particle->Vy();
	281	z = particle->Vz();
	282	pX = particle->Px();
	283	pY = particle->Py();
	284	pZ = particle->Pz();
	285
	286	// compute rest of track parameters at particle's vertex
	287	bendingSlope = 0;
	288	nonBendingSlope = 0;
	289	inverseBendingMomentum = 0;
	290	if (TMath::Abs(pZ) > 0) {
	291	bendingSlope = pY/pZ;
	292	nonBendingSlope = pX/pZ;
	293	}
	294	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	295	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	296	inverseBendingMomentum *= charge;
	297
	298	// set track parameters at particle's vertex
	299	AliMUONTrackParam trackParamAtVertex;
	300	trackParamAtVertex.SetNonBendingCoor(x);
	301	trackParamAtVertex.SetBendingCoor(y);
	302	trackParamAtVertex.SetZ(z);
	303	trackParamAtVertex.SetBendingSlope(bendingSlope);
	304	trackParamAtVertex.SetNonBendingSlope(nonBendingSlope);
	305	trackParamAtVertex.SetInverseBendingMomentum(inverseBendingMomentum);
	306
	307	// add track parameters at vertex
	308	track.SetTrackParamAtVertex(&trackParamAtVertex);
	309
103e6575	310	// store the track
96ebe67e	311	track.SetTrackID(iTrackRef);
96ebe67e	312	tmpTrackRefStore->Add(track);
b8dc484b	313	}
b8dc484b	314
96ebe67e	315	CleanMuonTrackRef(tmpTrackRefStore);
48217459	316
103e6575	317	delete hit;
103e6575	318	delete cStore;
96ebe67e	319	delete tmpTrackRefStore;
b8dc484b	320	}
	321
	322	//_____________________________________________________________________________
96ebe67e	323	void AliMUONRecoCheck::CleanMuonTrackRef(const AliMUONVTrackStore *tmpTrackRefStore)
b8dc484b	324	{
48217459	325	/// Re-calculate hits parameters because two AliTrackReferences are recorded for
	326	/// each chamber (one when particle is entering + one when particle is leaving
	327	/// the sensitive volume)
103e6575	328	if (!(fTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459	329
96ebe67e	330	Double_t maxGasGap = 1.; // cm
	331	Double_t x, y, z, pX, pY, pZ, x1, y1, z1, pX1, pY1, pZ1, z2;
	332	Double_t bendingSlope,nonBendingSlope,inverseBendingMomentum;
103e6575	333	AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
	334	if (!cStore) return;
	335	AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
48217459	336
96ebe67e	337	// create iterator
96ebe67e	338	TIter next(tmpTrackRefStore->CreateIterator());
48217459	339
96ebe67e	340	// loop over tmpTrackRef
48217459	341	AliMUONTrack* track;
96ebe67e	342	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	343
	344	AliMUONTrack newTrack;
	345
	346	// loop over tmpTrackRef's hits
	347	Int_t iHit1 = 0;
	348	Int_t nTrackHits = track->GetNClusters();
	349	while (iHit1 < nTrackHits) {
	350	AliMUONTrackParam trackParam1 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit1);
	351
	352	// get track parameters at hit1
	353	x1 = trackParam1->GetNonBendingCoor();
	354	y1 = trackParam1->GetBendingCoor();
	355	z1 = trackParam1->GetZ();
	356	pX1 = trackParam1->Px();
	357	pY1 = trackParam1->Py();
	358	pZ1 = trackParam1->Pz();
	359
	360	// prepare new track parameters
	361	x = x1;
	362	y = y1;
	363	z = z1;
	364	pX = pX1;
	365	pY = pY1;
	366	pZ = pZ1;
	367
	368	// loop over next tmpTrackRef's hits
	369	Int_t nCombinedHits = 1;
	370	for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	371	AliMUONTrackParam trackParam2 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit2);
48217459	372
96ebe67e	373	// get z position of hit2
	374	z2 = trackParam2->GetZ();
	375
	376	// complete new track parameters if hit2 is on the same detection element
	377	if ( TMath::Abs(z2-z1) < maxGasGap ) {
	378	x += trackParam2->GetNonBendingCoor();
	379	y += trackParam2->GetBendingCoor();
	380	z += z2;
	381	pX += trackParam2->Px();
	382	pY += trackParam2->Py();
	383	pZ += trackParam2->Pz();
	384	nCombinedHits++;
48217459	385	iHit1 = iHit2;
	386	}
	387
96ebe67e	388	}
	389
	390	// finalize new track parameters
	391	x /= (Double_t)nCombinedHits;
	392	y /= (Double_t)nCombinedHits;
	393	z /= (Double_t)nCombinedHits;
	394	pX /= (Double_t)nCombinedHits;
	395	pY /= (Double_t)nCombinedHits;
	396	pZ /= (Double_t)nCombinedHits;
	397	bendingSlope = 0;
	398	nonBendingSlope = 0;
	399	inverseBendingMomentum = 0;
	400	if (TMath::Abs(pZ) > 0) {
	401	bendingSlope = pY/pZ;
	402	nonBendingSlope = pX/pZ;
	403	}
	404	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	405	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	406	inverseBendingMomentum *= trackParam1->GetCharge();
b8dc484b	407
96ebe67e	408	// set hit parameters
103e6575	409	hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(trackParam1->GetClusterPtr()->GetChamberId(), 0, 0));
	410	hit->SetXYZ(x,y,z);
	411	hit->SetErrXY(0.,0.);
48217459	412
96ebe67e	413	// set new track parameters at new hit
	414	AliMUONTrackParam trackParam;
	415	trackParam.SetNonBendingCoor(x);
	416	trackParam.SetBendingCoor(y);
	417	trackParam.SetZ(z);
	418	trackParam.SetBendingSlope(bendingSlope);
	419	trackParam.SetNonBendingSlope(nonBendingSlope);
	420	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	421
	422	// add track parameters at current hit to the track
103e6575	423	newTrack.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
b8dc484b	424
b8dc484b	425	iHit1++;
96ebe67e	426	}
48217459	427
96ebe67e	428	newTrack.SetTrackID(track->GetTrackID());
	429	newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
	430	fTrackRefStore->Add(newTrack);
b8dc484b	431
96ebe67e	432	}
b8dc484b	433
103e6575	434	delete hit;
103e6575	435	delete cStore;
b8dc484b	436	}
	437
	438	//_____________________________________________________________________________
96ebe67e	439	void AliMUONRecoCheck::MakeReconstructibleTracks()
b8dc484b	440	{
61fed964	441	/// Isolate the reconstructible tracks
103e6575	442	if (!(fRecoTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459	443
96ebe67e	444	// create iterator on trackRef
96ebe67e	445	TIter next(fTrackRefStore->CreateIterator());
b8dc484b	446
96ebe67e	447	// loop over trackRef
48217459	448	AliMUONTrack* track;
96ebe67e	449	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	450
	451	Bool_t* chamberInTrack = new Bool_t(AliMUONConstants::NTrackingCh());
	452	for (Int_t iCh = 0; iCh < AliMUONConstants::NTrackingCh(); iCh++) chamberInTrack[iCh] = kFALSE;
48217459	453
96ebe67e	454	// loop over trackRef's hits to get hit chambers
	455	Int_t nTrackHits = track->GetNClusters();
	456	for (Int_t iHit = 0; iHit < nTrackHits; iHit++) {
	457	AliMUONVCluster* hit = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit))->GetClusterPtr();
	458	chamberInTrack[hit->GetChamberId()] = kTRUE;
cc056de1	459	}
96ebe67e	460
cc056de1	461	// track is reconstructible if the particle is depositing a hit
cc056de1	462	// in the following chamber combinations:
96ebe67e	463	Bool_t trackOK = kTRUE;
	464	if (!chamberInTrack[0] && !chamberInTrack[1]) trackOK = kFALSE;
	465	if (!chamberInTrack[2] && !chamberInTrack[3]) trackOK = kFALSE;
	466	if (!chamberInTrack[4] && !chamberInTrack[5]) trackOK = kFALSE;
	467	Int_t nHitsInLastStations = 0;
	468	for (Int_t iCh = 6; iCh < AliMUONConstants::NTrackingCh(); iCh++)
	469	if (chamberInTrack[iCh]) nHitsInLastStations++;
	470	if(nHitsInLastStations < 3) trackOK = kFALSE;
48217459	471
96ebe67e	472	// Add reconstructible tracks to fRecoTrackRefStore
96ebe67e	473	if (trackOK) fRecoTrackRefStore->Add(*track);
48217459	474
96ebe67e	475	delete [] chamberInTrack;
b8dc484b	476	}
48217459	477
b8dc484b	478	}
b8dc484b	479