[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>

#include "AliMUONRecoCheck.h"
#include "AliMUONRawClusterV2.h"
#include "AliMUONTrack.h"
#include "AliMUONConstants.h"
#include "AliMUONTrackStoreV1.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
  fRecoTrackStore = new AliMUONTrackStoreV1();
  
  Int_t nTracks = Int_t(fESDEvent->GetNumberOfMuonTracks());
  
  // loop over all reconstructed tracks
  for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
    AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
    
    // copy ESD MUON track into standard MUON track
    AliMUONTrack track(*esdTrack);
    
    // add track to the store
    fRecoTrackStore->Add(track);
  }
  
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeTrackRefs()
{
  /// Make reconstructible tracks
  AliMUONVTrackStore *tmpTrackRefStore = new AliMUONTrackStoreV1();
  
  Double_t x, y, z, pX, pY, pZ, bendingSlope, nonBendingSlope, inverseBendingMomentum;
  TParticle* particle;
  TClonesArray* trackRefs;
  Int_t nTrackRef = fMCEventHandler->MCEvent()->GetNumberOfTracks();
  
  // 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
      AliMUONRawClusterV2 hit(chamberId, 0, 0);
      hit.SetXYZ(x,y,z);
      hit.SetErrXY(0.,0.);
      
      // compute track parameters at hit
      Double_t bendingSlope = 0;
      Double_t nonBendingSlope = 0;
      Double_t 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);
    
    // sort trackParamAtCluster and store the track
    track.GetTrackParamAtCluster()->Sort();
    track.SetTrackID(iTrackRef);
    tmpTrackRefStore->Add(track);
  }
  
  CleanMuonTrackRef(tmpTrackRefStore);
  
  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) 
  fTrackRefStore = new AliMUONTrackStoreV1();
  
  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;
  
  // 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
      AliMUONRawClusterV2 hit(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.GetTrackParamAtCluster()->Sort();
    newTrack.SetTrackID(track->GetTrackID());
    newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
    fTrackRefStore->Add(newTrack);
    
  }
  
}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeReconstructibleTracks()
{
  /// Isolate the reconstructible tracks
  fRecoTrackRefStore = new AliMUONTrackStoreV1();
  
  // 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>
	31
cc056de1	32	#include "AliMUONRecoCheck.h"
96ebe67e	33	#include "AliMUONRawClusterV2.h"
cc056de1	34	#include "AliMUONTrack.h"
cc056de1	35	#include "AliMUONConstants.h"
96ebe67e	36	#include "AliMUONTrackStoreV1.h"
	37
	38	#include "AliMCEventHandler.h"
	39	#include "AliMCEvent.h"
b8dc484b	40	#include "AliStack.h"
cc056de1	41	#include "AliTrackReference.h"
9bdda5f6	42	#include "AliLog.h"
	43	#include "AliESDEvent.h"
	44	#include "AliESDMuonTrack.h"
96ebe67e	45
61fed964	46	#include <TFile.h>
61fed964	47	#include <TTree.h>
cc056de1	48	#include <TParticle.h>
5b1afea0	49	#include <TParticlePDG.h>
96ebe67e	50	#include <Riostream.h>
96ebe67e	51
5398f946	52	/// \cond CLASSIMP
b8dc484b	53	ClassImp(AliMUONRecoCheck)
5398f946	54	/// \endcond
b8dc484b	55
068e4c36	56	//_____________________________________________________________________________
61fed964	57	AliMUONRecoCheck::AliMUONRecoCheck(Char_t esdFileName, Char_t pathSim)
48217459	58	: TObject(),
96ebe67e	59	fMCEventHandler(new AliMCEventHandler()),
61fed964	60	fESDEvent(new AliESDEvent()),
	61	fESDTree (0x0),
	62	fESDFile (0x0),
96ebe67e	63	fCurrentEvent(0),
	64	fTrackRefStore(0x0),
	65	fRecoTrackRefStore(0x0),
	66	fRecoTrackStore(0x0)
068e4c36	67	{
48217459	68	/// Normal ctor
61fed964	69
61fed964	70	// TrackRefs and Particules
96ebe67e	71	fMCEventHandler->SetInputPath(pathSim);
96ebe67e	72	fMCEventHandler->InitIO("");
61fed964	73
	74	// ESD MUON Tracks
	75	fESDFile = TFile::Open(esdFileName); // open the file
	76	if (!fESDFile \|\| !fESDFile->IsOpen()) {
	77	AliError(Form("opening ESD file %s failed", esdFileName));
	78	fESDFile = 0x0;
	79	return;
	80	}
	81	fESDTree = (TTree*) fESDFile->Get("esdTree"); // get the tree
	82	if (!fESDTree) {
	83	AliError("no ESD tree found");
	84	fESDFile->Close();
	85	fESDFile = 0x0;
	86	return;
	87	}
	88	fESDEvent->ReadFromTree(fESDTree); // link fESDEvent to the tree
068e4c36	89	}
068e4c36	90
b8dc484b	91	//_____________________________________________________________________________
48217459	92	AliMUONRecoCheck::~AliMUONRecoCheck()
b8dc484b	93	{
48217459	94	/// Destructor
96ebe67e	95	delete fMCEventHandler;
61fed964	96	delete fESDEvent;
61fed964	97	if (fESDFile) fESDFile->Close();
96ebe67e	98	ResetStores();
	99	}
	100
	101	//_____________________________________________________________________________
	102	void AliMUONRecoCheck::ResetStores()
	103	{
	104	/// Deletes all the store objects that have been created and resets the pointers to 0x0
	105	delete fTrackRefStore; fTrackRefStore = 0x0;
	106	delete fRecoTrackRefStore; fRecoTrackRefStore = 0x0;
	107	delete fRecoTrackStore; fRecoTrackStore = 0x0;
	108	}
	109
	110	//_____________________________________________________________________________
	111	Int_t AliMUONRecoCheck::NumberOfEvents() const
	112	{
	113	/// Return the number of events
61fed964	114	if (fESDTree) return fESDTree->GetEntries();
96ebe67e	115	return 0;
b8dc484b	116	}
b8dc484b	117
48217459	118	//_____________________________________________________________________________
96ebe67e	119	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructedTracks(Int_t event)
48217459	120	{
61fed964	121	/// Return a track store containing the reconstructed tracks (converted into
61fed964	122	/// MUONTrack objects) for a given event
96ebe67e	123	if (event != fCurrentEvent) {
	124	ResetStores();
	125	fCurrentEvent = event;
	126	}
	127
	128	if (fRecoTrackStore != 0x0) return fRecoTrackStore;
61fed964	129	else {
	130	if (!fESDTree) return 0x0;
	131	if (fESDTree->GetEvent(event) <= 0) {
	132	AliError(Form("fails to read ESD object for event %d", event));
	133	return 0x0;
9bdda5f6	134	}
61fed964	135	MakeReconstructedTracks();
61fed964	136	return fRecoTrackStore;
9bdda5f6	137	}
9bdda5f6	138	}
	139
	140	//_____________________________________________________________________________
96ebe67e	141	AliMUONVTrackStore* AliMUONRecoCheck::TrackRefs(Int_t event)
b8dc484b	142	{
48217459	143	/// Return a track store containing the track references (converted into
48217459	144	/// MUONTrack objects) for a given event
96ebe67e	145	if (event != fCurrentEvent) {
	146	ResetStores();
	147	fCurrentEvent = event;
	148	}
	149
	150	if (fTrackRefStore != 0x0) return fTrackRefStore;
	151	else {
61fed964	152	if (!fMCEventHandler->GetEvent(event)) {
	153	AliError(Form("fails to read MC objects for event %d", event));
	154	return 0x0;
	155	}
96ebe67e	156	MakeTrackRefs();
	157	return fTrackRefStore;
	158	}
b8dc484b	159	}
	160
	161	//_____________________________________________________________________________
96ebe67e	162	AliMUONVTrackStore* AliMUONRecoCheck::ReconstructibleTracks(Int_t event)
b8dc484b	163	{
48217459	164	/// Return a track store containing the reconstructible tracks for a given event
96ebe67e	165	if (event != fCurrentEvent) {
	166	ResetStores();
	167	fCurrentEvent = event;
	168	}
	169
	170	if (fRecoTrackRefStore != 0x0) return fRecoTrackRefStore;
	171	else {
	172	if (TrackRefs(event) == 0x0) return 0x0;
	173	MakeReconstructibleTracks();
	174	return fRecoTrackRefStore;
	175	}
48217459	176	}
b8dc484b	177
61fed964	178	//_____________________________________________________________________________
	179	void AliMUONRecoCheck::MakeReconstructedTracks()
	180	{
	181	/// Make reconstructed tracks
	182	fRecoTrackStore = new AliMUONTrackStoreV1();
	183
	184	Int_t nTracks = Int_t(fESDEvent->GetNumberOfMuonTracks());
	185
	186	// loop over all reconstructed tracks
	187	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	188	AliESDMuonTrack* esdTrack = fESDEvent->GetMuonTrack(iTrack);
	189
	190	// copy ESD MUON track into standard MUON track
	191	AliMUONTrack track(*esdTrack);
	192
	193	// add track to the store
	194	fRecoTrackStore->Add(track);
	195	}
	196
	197	}
	198
48217459	199	//_____________________________________________________________________________
96ebe67e	200	void AliMUONRecoCheck::MakeTrackRefs()
48217459	201	{
48217459	202	/// Make reconstructible tracks
96ebe67e	203	AliMUONVTrackStore *tmpTrackRefStore = new AliMUONTrackStoreV1();
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();
b8dc484b	209
96ebe67e	210	// loop over simulated tracks
	211	for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; ++iTrackRef) {
	212	Int_t nHits = fMCEventHandler->GetParticleAndTR(iTrackRef, particle, trackRefs);
48217459	213
96ebe67e	214	// skip empty trackRefs
	215	if (nHits < 1) continue;
	216
61fed964	217	// get the particle charge for further calculation
61fed964	218	TParticlePDG* ppdg = particle->GetPDG();
96ebe67e	219	Int_t charge = (Int_t)(ppdg->Charge()/3.0);
96ebe67e	220
61fed964	221	AliMUONTrack track;
48217459	222
96ebe67e	223	// loop over simulated track hits
	224	for (Int_t iHit = 0; iHit < nHits; ++iHit) {
	225	AliTrackReference* trackReference = static_cast<AliTrackReference*>(trackRefs->UncheckedAt(iHit));
068e4c36	226
61fed964	227	// skip trackRefs not in MUON
	228	if (trackReference->DetectorId() != AliTrackReference::kMUON) continue;
	229
96ebe67e	230	// Get track parameters of current hit
	231	x = trackReference->X();
	232	y = trackReference->Y();
	233	z = trackReference->Z();
	234	pX = trackReference->Px();
	235	pY = trackReference->Py();
	236	pZ = trackReference->Pz();
b8dc484b	237
96ebe67e	238	// check chamberId of current trackReference
	239	Int_t chamberId = AliMUONConstants::ChamberNumber(z);
	240	if (chamberId < 0 \|\| chamberId >= AliMUONConstants::NTrackingCh()) continue;
48217459	241
96ebe67e	242	// set hit parameters
	243	AliMUONRawClusterV2 hit(chamberId, 0, 0);
	244	hit.SetXYZ(x,y,z);
	245	hit.SetErrXY(0.,0.);
b8dc484b	246
96ebe67e	247	// compute track parameters at hit
	248	Double_t bendingSlope = 0;
	249	Double_t nonBendingSlope = 0;
	250	Double_t inverseBendingMomentum = 0;
	251	if (TMath::Abs(pZ) > 0) {
	252	bendingSlope = pY/pZ;
	253	nonBendingSlope = pX/pZ;
b8dc484b	254	}
96ebe67e	255	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	256	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	257	inverseBendingMomentum *= charge;
	258
	259	// set track parameters at hit
	260	AliMUONTrackParam trackParam;
	261	trackParam.SetNonBendingCoor(x);
	262	trackParam.SetBendingCoor(y);
	263	trackParam.SetZ(z);
	264	trackParam.SetBendingSlope(bendingSlope);
	265	trackParam.SetNonBendingSlope(nonBendingSlope);
	266	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	267
	268	// add track parameters at current hit to the track
	269	track.AddTrackParamAtCluster(trackParam,hit,kTRUE);
	270	}
	271
61fed964	272	// if none of the track hits was in MUON, goto the next track
	273	if (track.GetNClusters() < 1) continue;
	274
	275	// get track parameters at particle's vertex
	276	x = particle->Vx();
	277	y = particle->Vy();
	278	z = particle->Vz();
	279	pX = particle->Px();
	280	pY = particle->Py();
	281	pZ = particle->Pz();
	282
	283	// compute rest of track parameters at particle's vertex
	284	bendingSlope = 0;
	285	nonBendingSlope = 0;
	286	inverseBendingMomentum = 0;
	287	if (TMath::Abs(pZ) > 0) {
	288	bendingSlope = pY/pZ;
	289	nonBendingSlope = pX/pZ;
	290	}
	291	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	292	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	293	inverseBendingMomentum *= charge;
	294
	295	// set track parameters at particle's vertex
	296	AliMUONTrackParam trackParamAtVertex;
	297	trackParamAtVertex.SetNonBendingCoor(x);
	298	trackParamAtVertex.SetBendingCoor(y);
	299	trackParamAtVertex.SetZ(z);
	300	trackParamAtVertex.SetBendingSlope(bendingSlope);
	301	trackParamAtVertex.SetNonBendingSlope(nonBendingSlope);
	302	trackParamAtVertex.SetInverseBendingMomentum(inverseBendingMomentum);
	303
	304	// add track parameters at vertex
	305	track.SetTrackParamAtVertex(&trackParamAtVertex);
	306
	307	// sort trackParamAtCluster and store the track
96ebe67e	308	track.GetTrackParamAtCluster()->Sort();
	309	track.SetTrackID(iTrackRef);
	310	tmpTrackRefStore->Add(track);
b8dc484b	311	}
b8dc484b	312
96ebe67e	313	CleanMuonTrackRef(tmpTrackRefStore);
48217459	314
96ebe67e	315	delete tmpTrackRefStore;
b8dc484b	316	}
	317
	318	//_____________________________________________________________________________
96ebe67e	319	void AliMUONRecoCheck::CleanMuonTrackRef(const AliMUONVTrackStore *tmpTrackRefStore)
b8dc484b	320	{
48217459	321	/// Re-calculate hits parameters because two AliTrackReferences are recorded for
	322	/// each chamber (one when particle is entering + one when particle is leaving
	323	/// the sensitive volume)
96ebe67e	324	fTrackRefStore = new AliMUONTrackStoreV1();
48217459	325
96ebe67e	326	Double_t maxGasGap = 1.; // cm
	327	Double_t x, y, z, pX, pY, pZ, x1, y1, z1, pX1, pY1, pZ1, z2;
	328	Double_t bendingSlope,nonBendingSlope,inverseBendingMomentum;
48217459	329
96ebe67e	330	// create iterator
96ebe67e	331	TIter next(tmpTrackRefStore->CreateIterator());
48217459	332
96ebe67e	333	// loop over tmpTrackRef
48217459	334	AliMUONTrack* track;
96ebe67e	335	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	336
	337	AliMUONTrack newTrack;
	338
	339	// loop over tmpTrackRef's hits
	340	Int_t iHit1 = 0;
	341	Int_t nTrackHits = track->GetNClusters();
	342	while (iHit1 < nTrackHits) {
	343	AliMUONTrackParam trackParam1 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit1);
	344
	345	// get track parameters at hit1
	346	x1 = trackParam1->GetNonBendingCoor();
	347	y1 = trackParam1->GetBendingCoor();
	348	z1 = trackParam1->GetZ();
	349	pX1 = trackParam1->Px();
	350	pY1 = trackParam1->Py();
	351	pZ1 = trackParam1->Pz();
	352
	353	// prepare new track parameters
	354	x = x1;
	355	y = y1;
	356	z = z1;
	357	pX = pX1;
	358	pY = pY1;
	359	pZ = pZ1;
	360
	361	// loop over next tmpTrackRef's hits
	362	Int_t nCombinedHits = 1;
	363	for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	364	AliMUONTrackParam trackParam2 = (AliMUONTrackParam) track->GetTrackParamAtCluster()->UncheckedAt(iHit2);
48217459	365
96ebe67e	366	// get z position of hit2
	367	z2 = trackParam2->GetZ();
	368
	369	// complete new track parameters if hit2 is on the same detection element
	370	if ( TMath::Abs(z2-z1) < maxGasGap ) {
	371	x += trackParam2->GetNonBendingCoor();
	372	y += trackParam2->GetBendingCoor();
	373	z += z2;
	374	pX += trackParam2->Px();
	375	pY += trackParam2->Py();
	376	pZ += trackParam2->Pz();
	377	nCombinedHits++;
48217459	378	iHit1 = iHit2;
	379	}
	380
96ebe67e	381	}
	382
	383	// finalize new track parameters
	384	x /= (Double_t)nCombinedHits;
	385	y /= (Double_t)nCombinedHits;
	386	z /= (Double_t)nCombinedHits;
	387	pX /= (Double_t)nCombinedHits;
	388	pY /= (Double_t)nCombinedHits;
	389	pZ /= (Double_t)nCombinedHits;
	390	bendingSlope = 0;
	391	nonBendingSlope = 0;
	392	inverseBendingMomentum = 0;
	393	if (TMath::Abs(pZ) > 0) {
	394	bendingSlope = pY/pZ;
	395	nonBendingSlope = pX/pZ;
	396	}
	397	Double_t pYZ = TMath::Sqrt(pYpY+pZpZ);
	398	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	399	inverseBendingMomentum *= trackParam1->GetCharge();
b8dc484b	400
96ebe67e	401	// set hit parameters
	402	AliMUONRawClusterV2 hit(trackParam1->GetClusterPtr()->GetChamberId(), 0, 0);
	403	hit.SetXYZ(x,y,z);
	404	hit.SetErrXY(0.,0.);
48217459	405
96ebe67e	406	// set new track parameters at new hit
	407	AliMUONTrackParam trackParam;
	408	trackParam.SetNonBendingCoor(x);
	409	trackParam.SetBendingCoor(y);
	410	trackParam.SetZ(z);
	411	trackParam.SetBendingSlope(bendingSlope);
	412	trackParam.SetNonBendingSlope(nonBendingSlope);
	413	trackParam.SetInverseBendingMomentum(inverseBendingMomentum);
	414
	415	// add track parameters at current hit to the track
	416	newTrack.AddTrackParamAtCluster(trackParam,hit,kTRUE);
b8dc484b	417
b8dc484b	418	iHit1++;
96ebe67e	419	}
48217459	420
96ebe67e	421	newTrack.GetTrackParamAtCluster()->Sort();
	422	newTrack.SetTrackID(track->GetTrackID());
	423	newTrack.SetTrackParamAtVertex(track->GetTrackParamAtVertex());
	424	fTrackRefStore->Add(newTrack);
b8dc484b	425
96ebe67e	426	}
b8dc484b	427
b8dc484b	428	}
	429
	430	//_____________________________________________________________________________
96ebe67e	431	void AliMUONRecoCheck::MakeReconstructibleTracks()
b8dc484b	432	{
61fed964	433	/// Isolate the reconstructible tracks
96ebe67e	434	fRecoTrackRefStore = new AliMUONTrackStoreV1();
48217459	435
96ebe67e	436	// create iterator on trackRef
96ebe67e	437	TIter next(fTrackRefStore->CreateIterator());
b8dc484b	438
96ebe67e	439	// loop over trackRef
48217459	440	AliMUONTrack* track;
96ebe67e	441	while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
	442
	443	Bool_t* chamberInTrack = new Bool_t(AliMUONConstants::NTrackingCh());
	444	for (Int_t iCh = 0; iCh < AliMUONConstants::NTrackingCh(); iCh++) chamberInTrack[iCh] = kFALSE;
48217459	445
96ebe67e	446	// loop over trackRef's hits to get hit chambers
	447	Int_t nTrackHits = track->GetNClusters();
	448	for (Int_t iHit = 0; iHit < nTrackHits; iHit++) {
	449	AliMUONVCluster* hit = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iHit))->GetClusterPtr();
	450	chamberInTrack[hit->GetChamberId()] = kTRUE;
cc056de1	451	}
96ebe67e	452
cc056de1	453	// track is reconstructible if the particle is depositing a hit
cc056de1	454	// in the following chamber combinations:
96ebe67e	455	Bool_t trackOK = kTRUE;
	456	if (!chamberInTrack[0] && !chamberInTrack[1]) trackOK = kFALSE;
	457	if (!chamberInTrack[2] && !chamberInTrack[3]) trackOK = kFALSE;
	458	if (!chamberInTrack[4] && !chamberInTrack[5]) trackOK = kFALSE;
	459	Int_t nHitsInLastStations = 0;
	460	for (Int_t iCh = 6; iCh < AliMUONConstants::NTrackingCh(); iCh++)
	461	if (chamberInTrack[iCh]) nHitsInLastStations++;
	462	if(nHitsInLastStations < 3) trackOK = kFALSE;
48217459	463
96ebe67e	464	// Add reconstructible tracks to fRecoTrackRefStore
96ebe67e	465	if (trackOK) fRecoTrackRefStore->Add(*track);
48217459	466
96ebe67e	467	delete [] chamberInTrack;
b8dc484b	468	}
48217459	469
b8dc484b	470	}
b8dc484b	471