[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 = ppdg != NULL ? (Int_t)(ppdg->Charge()/3.0) : 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	#include "AliMCEventHandler.h"
96ebe67e	43	#include "AliMCEvent.h"
b8dc484b	44	#include "AliStack.h"
cc056de1	45	#include "AliTrackReference.h"
9bdda5f6	46	#include "AliLog.h"
	47	#include "AliESDEvent.h"
	48	#include "AliESDMuonTrack.h"
96ebe67e	49
61fed964	50	#include <TFile.h>
61fed964	51	#include <TTree.h>
cc056de1	52	#include <TParticle.h>
5b1afea0	53	#include <TParticlePDG.h>
96ebe67e	54	#include <Riostream.h>
96ebe67e	55
5398f946	56	/// \cond CLASSIMP
b8dc484b	57	ClassImp(AliMUONRecoCheck)
5398f946	58	/// \endcond
b8dc484b	59
068e4c36	60	//_____________________________________________________________________________
ad3c6eda	61	AliMUONRecoCheck::AliMUONRecoCheck(Char_t esdFileName, Char_t pathSim)
48217459	62	: TObject(),
96ebe67e	63	fMCEventHandler(new AliMCEventHandler()),
61fed964	64	fESDEvent(new AliESDEvent()),
	65	fESDTree (0x0),
	66	fESDFile (0x0),
96ebe67e	67	fCurrentEvent(0),
	68	fTrackRefStore(0x0),
	69	fRecoTrackRefStore(0x0),
	70	fRecoTrackStore(0x0)
068e4c36	71	{
48217459	72	/// Normal ctor
61fed964	73
61fed964	74	// TrackRefs and Particules
96ebe67e	75	fMCEventHandler->SetInputPath(pathSim);
96ebe67e	76	fMCEventHandler->InitIO("");
61fed964	77
	78	// ESD MUON Tracks
	79	fESDFile = TFile::Open(esdFileName); // open the file
	80	if (!fESDFile \|\| !fESDFile->IsOpen()) {
	81	AliError(Form("opening ESD file %s failed", esdFileName));
	82	fESDFile = 0x0;
	83	return;
	84	}
	85	fESDTree = (TTree*) fESDFile->Get("esdTree"); // get the tree
	86	if (!fESDTree) {
	87	AliError("no ESD tree found");
	88	fESDFile->Close();
	89	fESDFile = 0x0;
	90	return;
	91	}
	92	fESDEvent->ReadFromTree(fESDTree); // link fESDEvent to the tree
068e4c36	93	}
068e4c36	94
b8dc484b	95	//_____________________________________________________________________________
48217459	96	AliMUONRecoCheck::~AliMUONRecoCheck()
b8dc484b	97	{
48217459	98	/// Destructor
96ebe67e	99	delete fMCEventHandler;
61fed964	100	delete fESDEvent;
61fed964	101	if (fESDFile) fESDFile->Close();
96ebe67e	102	ResetStores();
	103	}
	104
	105	//_____________________________________________________________________________
	106	void AliMUONRecoCheck::ResetStores()
	107	{
	108	/// Deletes all the store objects that have been created and resets the pointers to 0x0
	109	delete fTrackRefStore; fTrackRefStore = 0x0;
	110	delete fRecoTrackRefStore; fRecoTrackRefStore = 0x0;
	111	delete fRecoTrackStore; fRecoTrackStore = 0x0;
	112	}
	113
	114	//_____________________________________________________________________________
	115	Int_t AliMUONRecoCheck::NumberOfEvents() const
	116	{
	117	/// Return the number of events
61fed964	118	if (fESDTree) return fESDTree->GetEntries();
96ebe67e	119	return 0;
b8dc484b	120	}
b8dc484b	121
48217459	122	//_____________________________________________________________________________
96ebe67e	123	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructedTracks(Int_t event)
48217459	124	{
61fed964	125	/// Return a track store containing the reconstructed tracks (converted into
61fed964	126	/// MUONTrack objects) for a given event
96ebe67e	127	if (event != fCurrentEvent) {
	128	ResetStores();
	129	fCurrentEvent = event;
	130	}
	131
	132	if (fRecoTrackStore != 0x0) return fRecoTrackStore;
61fed964	133	else {
	134	if (!fESDTree) return 0x0;
	135	if (fESDTree->GetEvent(event) <= 0) {
	136	AliError(Form("fails to read ESD object for event %d", event));
	137	return 0x0;
9bdda5f6	138	}
61fed964	139	MakeReconstructedTracks();
61fed964	140	return fRecoTrackStore;
9bdda5f6	141	}
9bdda5f6	142	}
	143
	144	//_____________________________________________________________________________
96ebe67e	145	AliMUONVTrackStore* AliMUONRecoCheck::TrackRefs(Int_t event)
b8dc484b	146	{
48217459	147	/// Return a track store containing the track references (converted into
48217459	148	/// MUONTrack objects) for a given event
96ebe67e	149	if (event != fCurrentEvent) {
	150	ResetStores();
	151	fCurrentEvent = event;
	152	}
	153
	154	if (fTrackRefStore != 0x0) return fTrackRefStore;
	155	else {
61fed964	156	if (!fMCEventHandler->GetEvent(event)) {
	157	AliError(Form("fails to read MC objects for event %d", event));
	158	return 0x0;
	159	}
96ebe67e	160	MakeTrackRefs();
	161	return fTrackRefStore;
	162	}
b8dc484b	163	}
	164
	165	//_____________________________________________________________________________
96ebe67e	166	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructibleTracks(Int_t event)
b8dc484b	167	{
48217459	168	/// Return a track store containing the reconstructible tracks for a given event
96ebe67e	169	if (event != fCurrentEvent) {
	170	ResetStores();
	171	fCurrentEvent = event;
	172	}
	173
	174	if (fRecoTrackRefStore != 0x0) return fRecoTrackRefStore;
	175	else {
	176	if (TrackRefs(event) == 0x0) return 0x0;
	177	MakeReconstructibleTracks();
	178	return fRecoTrackRefStore;
	179	}
48217459	180	}
b8dc484b	181
61fed964	182	//_____________________________________________________________________________
	183	void AliMUONRecoCheck::MakeReconstructedTracks()
	184	{
	185	/// Make reconstructed tracks
103e6575	186	if (!(fRecoTrackStore = AliMUONESDInterface::NewTrackStore())) return;
61fed964	187
b1fea02e	188	// loop over all reconstructed tracks and add them to the store (skip ghosts)
103e6575	189	Int_t nTracks = (Int_t) fESDEvent->GetNumberOfMuonTracks();
b1fea02e	190	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
b1fea02e	191	AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
ad3c6eda	192	if (esdTrack->ContainTrackerData()) AliMUONESDInterface::Add(esdTrack, fRecoTrackStore);
b1fea02e	193	}
61fed964	194
	195	}
	196
48217459	197	//_____________________________________________________________________________
96ebe67e	198	void AliMUONRecoCheck::MakeTrackRefs()
48217459	199	{
48217459	200	/// Make reconstructible tracks
103e6575	201	AliMUONVTrackStore *tmpTrackRefStore = AliMUONESDInterface::NewTrackStore();
103e6575	202	if (!tmpTrackRefStore) return;
48217459	203
96ebe67e	204	Double_t x, y, z, pX, pY, pZ, bendingSlope, nonBendingSlope, inverseBendingMomentum;
	205	TParticle* particle;
	206	TClonesArray* trackRefs;
	207	Int_t nTrackRef = fMCEventHandler->MCEvent()->GetNumberOfTracks();
103e6575	208	AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
	209	if (!cStore) return;
	210	AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
b8dc484b	211
96ebe67e	212	// loop over simulated tracks
	213	for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; ++iTrackRef) {
	214	Int_t nHits = fMCEventHandler->GetParticleAndTR(iTrackRef, particle, trackRefs);
48217459	215
96ebe67e	216	// skip empty trackRefs
	217	if (nHits < 1) continue;
	218
61fed964	219	// get the particle charge for further calculation
61fed964	220	TParticlePDG* ppdg = particle->GetPDG();
46df197d	221	Int_t charge = ppdg != NULL ? (Int_t)(ppdg->Charge()/3.0) : 0;
96ebe67e	222
61fed964	223	AliMUONTrack track;
48217459	224
96ebe67e	225	// loop over simulated track hits
	226	for (Int_t iHit = 0; iHit < nHits; ++iHit) {
	227	AliTrackReference* trackReference = static_cast<AliTrackReference*>(trackRefs->UncheckedAt(iHit));
068e4c36	228
61fed964	229	// skip trackRefs not in MUON
	230	if (trackReference->DetectorId() != AliTrackReference::kMUON) continue;
	231
96ebe67e	232	// Get track parameters of current hit
	233	x = trackReference->X();
	234	y = trackReference->Y();
	235	z = trackReference->Z();
	236	pX = trackReference->Px();
	237	pY = trackReference->Py();
	238	pZ = trackReference->Pz();
b8dc484b	239
96ebe67e	240	// check chamberId of current trackReference
	241	Int_t chamberId = AliMUONConstants::ChamberNumber(z);
	242	if (chamberId < 0 \|\| chamberId >= AliMUONConstants::NTrackingCh()) continue;
48217459	243
96ebe67e	244	// set hit parameters
103e6575	245	hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(chamberId, 0, 0));
	246	hit->SetXYZ(x,y,z);
	247	hit->SetErrXY(0.,0.);
b8dc484b	248
96ebe67e	249	// compute track parameters at hit
7cdc832b	250	bendingSlope = 0;
	251	nonBendingSlope = 0;
	252	inverseBendingMomentum = 0;
96ebe67e	253	if (TMath::Abs(pZ) > 0) {
	254	bendingSlope = pY/pZ;
	255	nonBendingSlope = pX/pZ;
b8dc484b	256	}
96ebe67e	257	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	258	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	259	inverseBendingMomentum *= charge;
	260
	261	// set track parameters at hit
	262	AliMUONTrackParam trackParam;
	263	trackParam.SetNonBendingCoor(x);
	264	trackParam.SetBendingCoor(y);
	265	trackParam.SetZ(z);
	266	trackParam.SetBendingSlope(bendingSlope);
	267	trackParam.SetNonBendingSlope(nonBendingSlope);
	268	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	269
	270	// add track parameters at current hit to the track
103e6575	271	track.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
96ebe67e	272	}
96ebe67e	273
61fed964	274	// if none of the track hits was in MUON, goto the next track
	275	if (track.GetNClusters() < 1) continue;
	276
	277	// get track parameters at particle's vertex
	278	x = particle->Vx();
	279	y = particle->Vy();
	280	z = particle->Vz();
	281	pX = particle->Px();
	282	pY = particle->Py();
	283	pZ = particle->Pz();
	284
	285	// compute rest of track parameters at particle's vertex
	286	bendingSlope = 0;
	287	nonBendingSlope = 0;
	288	inverseBendingMomentum = 0;
	289	if (TMath::Abs(pZ) > 0) {
	290	bendingSlope = pY/pZ;
	291	nonBendingSlope = pX/pZ;
	292	}
	293	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	294	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	295	inverseBendingMomentum *= charge;
	296
	297	// set track parameters at particle's vertex
	298	AliMUONTrackParam trackParamAtVertex;
	299	trackParamAtVertex.SetNonBendingCoor(x);
	300	trackParamAtVertex.SetBendingCoor(y);
	301	trackParamAtVertex.SetZ(z);
	302	trackParamAtVertex.SetBendingSlope(bendingSlope);
	303	trackParamAtVertex.SetNonBendingSlope(nonBendingSlope);
	304	trackParamAtVertex.SetInverseBendingMomentum(inverseBendingMomentum);
	305
	306	// add track parameters at vertex
	307	track.SetTrackParamAtVertex(&trackParamAtVertex);
	308
103e6575	309	// store the track
96ebe67e	310	track.SetTrackID(iTrackRef);
96ebe67e	311	tmpTrackRefStore->Add(track);
b8dc484b	312	}
b8dc484b	313
96ebe67e	314	CleanMuonTrackRef(tmpTrackRefStore);
48217459	315
103e6575	316	delete hit;
103e6575	317	delete cStore;
96ebe67e	318	delete tmpTrackRefStore;
b8dc484b	319	}
	320
	321	//_____________________________________________________________________________
96ebe67e	322	void AliMUONRecoCheck::CleanMuonTrackRef(const AliMUONVTrackStore *tmpTrackRefStore)
b8dc484b	323	{
48217459	324	/// Re-calculate hits parameters because two AliTrackReferences are recorded for
	325	/// each chamber (one when particle is entering + one when particle is leaving
	326	/// the sensitive volume)
103e6575	327	if (!(fTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459	328
96ebe67e	329	Double_t maxGasGap = 1.; // cm
	330	Double_t x, y, z, pX, pY, pZ, x1, y1, z1, pX1, pY1, pZ1, z2;
	331	Double_t bendingSlope,nonBendingSlope,inverseBendingMomentum;
103e6575	332	AliMUONVClusterStore* cStore = AliMUONESDInterface::NewClusterStore();
	333	if (!cStore) return;
	334	AliMUONVCluster* hit = cStore->CreateCluster(0,0,0);
48217459	335
96ebe67e	336	// create iterator
96ebe67e	337	TIter next(tmpTrackRefStore->CreateIterator());
48217459	338
96ebe67e	339	// loop over tmpTrackRef
48217459	340	AliMUONTrack* track;
96ebe67e	341	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	342
	343	AliMUONTrack newTrack;
	344
	345	// loop over tmpTrackRef's hits
	346	Int_t iHit1 = 0;
	347	Int_t nTrackHits = track->GetNClusters();
	348	while (iHit1 < nTrackHits) {
	349	AliMUONTrackParam trackParam1 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit1);
	350
	351	// get track parameters at hit1
	352	x1 = trackParam1->GetNonBendingCoor();
	353	y1 = trackParam1->GetBendingCoor();
	354	z1 = trackParam1->GetZ();
	355	pX1 = trackParam1->Px();
	356	pY1 = trackParam1->Py();
	357	pZ1 = trackParam1->Pz();
	358
	359	// prepare new track parameters
	360	x = x1;
	361	y = y1;
	362	z = z1;
	363	pX = pX1;
	364	pY = pY1;
	365	pZ = pZ1;
	366
	367	// loop over next tmpTrackRef's hits
	368	Int_t nCombinedHits = 1;
	369	for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	370	AliMUONTrackParam trackParam2 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit2);
48217459	371
96ebe67e	372	// get z position of hit2
	373	z2 = trackParam2->GetZ();
	374
	375	// complete new track parameters if hit2 is on the same detection element
	376	if ( TMath::Abs(z2-z1) < maxGasGap ) {
	377	x += trackParam2->GetNonBendingCoor();
	378	y += trackParam2->GetBendingCoor();
	379	z += z2;
	380	pX += trackParam2->Px();
	381	pY += trackParam2->Py();
	382	pZ += trackParam2->Pz();
	383	nCombinedHits++;
48217459	384	iHit1 = iHit2;
	385	}
	386
96ebe67e	387	}
	388
	389	// finalize new track parameters
	390	x /= (Double_t)nCombinedHits;
	391	y /= (Double_t)nCombinedHits;
	392	z /= (Double_t)nCombinedHits;
	393	pX /= (Double_t)nCombinedHits;
	394	pY /= (Double_t)nCombinedHits;
	395	pZ /= (Double_t)nCombinedHits;
	396	bendingSlope = 0;
	397	nonBendingSlope = 0;
	398	inverseBendingMomentum = 0;
	399	if (TMath::Abs(pZ) > 0) {
	400	bendingSlope = pY/pZ;
	401	nonBendingSlope = pX/pZ;
	402	}
	403	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	404	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	405	inverseBendingMomentum *= trackParam1->GetCharge();
b8dc484b	406
96ebe67e	407	// set hit parameters
103e6575	408	hit->SetUniqueID(AliMUONVCluster::BuildUniqueID(trackParam1->GetClusterPtr()->GetChamberId(), 0, 0));
	409	hit->SetXYZ(x,y,z);
	410	hit->SetErrXY(0.,0.);
48217459	411
96ebe67e	412	// set new track parameters at new hit
	413	AliMUONTrackParam trackParam;
	414	trackParam.SetNonBendingCoor(x);
	415	trackParam.SetBendingCoor(y);
	416	trackParam.SetZ(z);
	417	trackParam.SetBendingSlope(bendingSlope);
	418	trackParam.SetNonBendingSlope(nonBendingSlope);
	419	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	420
	421	// add track parameters at current hit to the track
103e6575	422	newTrack.AddTrackParamAtCluster(trackParam, *hit, kTRUE);
b8dc484b	423
b8dc484b	424	iHit1++;
96ebe67e	425	}
48217459	426
96ebe67e	427	newTrack.SetTrackID(track->GetTrackID());
	428	newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
	429	fTrackRefStore->Add(newTrack);
b8dc484b	430
96ebe67e	431	}
b8dc484b	432
103e6575	433	delete hit;
103e6575	434	delete cStore;
b8dc484b	435	}
	436
	437	//_____________________________________________________________________________
96ebe67e	438	void AliMUONRecoCheck::MakeReconstructibleTracks()
b8dc484b	439	{
61fed964	440	/// Isolate the reconstructible tracks
103e6575	441	if (!(fRecoTrackRefStore = AliMUONESDInterface::NewTrackStore())) return;
48217459	442
96ebe67e	443	// create iterator on trackRef
96ebe67e	444	TIter next(fTrackRefStore->CreateIterator());
b8dc484b	445
96ebe67e	446	// loop over trackRef
48217459	447	AliMUONTrack* track;
96ebe67e	448	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	449
	450	Bool_t* chamberInTrack = new Bool_t(AliMUONConstants::NTrackingCh());
	451	for (Int_t iCh = 0; iCh < AliMUONConstants::NTrackingCh(); iCh++) chamberInTrack[iCh] = kFALSE;
48217459	452
96ebe67e	453	// loop over trackRef's hits to get hit chambers
	454	Int_t nTrackHits = track->GetNClusters();
	455	for (Int_t iHit = 0; iHit < nTrackHits; iHit++) {
	456	AliMUONVCluster* hit = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit))->GetClusterPtr();
	457	chamberInTrack[hit->GetChamberId()] = kTRUE;
cc056de1	458	}
96ebe67e	459
cc056de1	460	// track is reconstructible if the particle is depositing a hit
cc056de1	461	// in the following chamber combinations:
96ebe67e	462	Bool_t trackOK = kTRUE;
	463	if (!chamberInTrack[0] && !chamberInTrack[1]) trackOK = kFALSE;
	464	if (!chamberInTrack[2] && !chamberInTrack[3]) trackOK = kFALSE;
	465	if (!chamberInTrack[4] && !chamberInTrack[5]) trackOK = kFALSE;
	466	Int_t nHitsInLastStations = 0;
	467	for (Int_t iCh = 6; iCh < AliMUONConstants::NTrackingCh(); iCh++)
	468	if (chamberInTrack[iCh]) nHitsInLastStations++;
	469	if(nHitsInLastStations < 3) trackOK = kFALSE;
48217459	470
96ebe67e	471	// Add reconstructible tracks to fRecoTrackRefStore
96ebe67e	472	if (trackOK) fRecoTrackRefStore->Add(*track);
48217459	473
96ebe67e	474	delete [] chamberInTrack;
b8dc484b	475	}
48217459	476
b8dc484b	477	}
b8dc484b	478