[u/mrichter/AliRoot.git] / MUON / MUONrecoNtuple.C

// Macro MUONrecoNtuple.C (TO BE COMPILED)
// for testing the C++ reconstruction code
// and producing an Ntuple with reconstructed tracks
// in output file "MUONtrackReco.root".
// An example for using the Ntuple is in the macro MUONmassPlot.C

// Arguments:
//   FirstEvent (default 0)
//   LastEvent (default 0)
//   RecGeantHits (1 to reconstruct GEANT hits) (default 0)
//   FileName (for signal) (default "galice.root")
//   BkgGeantFileName (for background),
//      needed only if RecGeantHits = 1 and background to be added

// IMPORTANT NOTICE FOR USERS:
// under "root" or "root.exe", execute the following commands:
// 1. "gSystem->SetIncludePath("-I$ALICE_ROOT/MUON -I$ALICE_ROOT/STEER -I$ROOTSYS/include")" to get the right path at compilation time
// 2. ".x loadlibs.C" to load the shared libraries
// 3. ".x MUONrecoNtuple.C+()" with the right arguments, without forgetting the "+" which implies the compilation of the macro before its execution

#include <iostream.h>

#include <TClassTable.h>
#include <TClonesArray.h>
#include <TFile.h>
#include <TParticle.h>
#include <TROOT.h>
#include <TTree.h>

#include "AliRun.h"

#include "AliMUONEventReconstructor.h"
#include "AliMUONTrack.h"
#include "AliMUONTrackHit.h"
#include "AliMUONTrackParam.h"

// Classes for Ntuple ////////////////////////////////////////////////////

class AliMUONTrackRecNtuple : public TObject {
 public:
  // for direct access to members
  Int_t fCharge; // charge of reconstructed track (+/- 1)
  Float_t fPxRec; // Px of reconstructed track at vertex (GeV/c)
  Float_t fPyRec; // Py of reconstructed track at vertex (GeV/c)
  Float_t fPzRec; // Pz of reconstructed track at vertex (GeV/c)
  Float_t fZRec; // Z of reconstructed track at vertex (cm)
  Float_t fZRec1; // Z of reconstructed track at first hit (cm)
  Int_t fNHits; // number of hits
  Float_t fChi2; // chi2 of fit
  Float_t fPxGen; // Px of best compatible generated track at vertex (GeV/c)
  Float_t fPyGen; // Py of best compatible generated track at vertex (GeV/c)
  Float_t fPzGen; // Pz of best compatible generated track at vertex (GeV/c)
  AliMUONTrackRecNtuple(){;} // Constructor
  virtual ~AliMUONTrackRecNtuple(){;} // Destructor
 protected:
 private:
  ClassDef(AliMUONTrackRecNtuple, 1) // AliMUONTrackRecNtuple
    };

class AliMUONHeaderRecNtuple : public TObject {
 public:
  // for direct access to members
  Int_t fEvent; // event number
  AliMUONHeaderRecNtuple(){;} // Constructor
  virtual ~AliMUONHeaderRecNtuple(){;} // Destructor
 protected:
 private:
  ClassDef(AliMUONHeaderRecNtuple, 1) // AliMUONHeaderRecNtuple
    };

ClassImp(AliMUONTrackRecNtuple) // Class implementation in ROOT context
ClassImp(AliMUONHeaderRecNtuple) // Class implementation in ROOT context

  //__________________________________________________________________________
void AliMUONEventRecNtupleFill(AliMUONEventReconstructor *Reco, Int_t FillWrite = 0)
{
  // Fill Ntuple for reconstructed event pointed to by "Reco"
  // if "FillWrite" different from -1.
  // Ntuple is created automatically before filling first event.
  // If "FillWrite" = -1, write and close the file

  static Bool_t firstTime = kTRUE;
  static TTree *ntuple;
  static AliMUONHeaderRecNtuple *header = new AliMUONHeaderRecNtuple();
  static TClonesArray *recTracks = new TClonesArray("AliMUONTrackRecNtuple",5);

  Int_t trackIndex;
  AliMUONTrack *track;
  AliMUONTrackParam *trackParam;
  AliMUONTrackRecNtuple *recTrackNt;
  Double_t bendingSlope, nonBendingSlope, pYZ;

  if (FillWrite == -1) {
    // better to create the file before the Ntuple ????
    TFile *file = new TFile("MUONtrackReco.root","recreate");
    ntuple->Write();
    file->Write();
    file->Close();
  }

  if (firstTime) {
    firstTime = kFALSE;
    // first call: create tree for Ntuple...
    ntuple = new TTree("MUONtrackReco", "MUONtrackReco");
    ntuple->Branch("Header","AliMUONHeaderRecNtuple", &header);
    ntuple->Branch("Tracks", &recTracks);
  }

  // header
  header->fEvent = gAlice->GetHeader()->GetEvent();

  TClonesArray *recoTracksPtr = Reco->GetRecTracksPtr();
  recoTracksPtr->Compress(); // for simple loop without "Next" since no hole
  recTracks->Clear(); // to reset the TClonesArray of tracks to be put in the ntuple
  // Loop over reconstructed tracks
  for (trackIndex = 0; trackIndex < Reco->GetNRecTracks(); trackIndex++) {
    track = (AliMUONTrack*) ((*recoTracksPtr)[trackIndex]);
    recTrackNt = (AliMUONTrackRecNtuple*)
      new ((*recTracks)[trackIndex]) AliMUONTrackRecNtuple();
    // track parameters at Vertex
    trackParam = track->GetTrackParamAtVertex();
    recTrackNt->fCharge =
      Int_t(TMath::Sign(1., trackParam->GetInverseBendingMomentum()));
    bendingSlope = trackParam->GetBendingSlope();
    nonBendingSlope = trackParam->GetNonBendingSlope();
    pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
    recTrackNt->fPzRec = pYZ / TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
    recTrackNt->fPxRec = recTrackNt->fPzRec * nonBendingSlope;
    recTrackNt->fPyRec = recTrackNt->fPzRec * bendingSlope;
    recTrackNt->fZRec = trackParam->GetZ();
    // track parameters at first hit
    trackParam = ((AliMUONTrackHit*)
		  (track->GetTrackHitsPtr()->First()))->GetTrackParam();
    recTrackNt->fZRec1 = trackParam->GetZ();
    // chi2
    recTrackNt->fChi2 = track->GetFitFMin();
    // number of hits
    recTrackNt->fNHits = track->GetNTrackHits();
    // track parameters at vertex of best compatible generated track:
    // in fact muon with the right charge
    for (int iPart = 0; iPart < gAlice->Particles()->GetEntriesFast(); iPart++) {
      TParticle *particle = (TParticle*) gAlice->Particles()->UncheckedAt(iPart);
      if ((particle->GetPdgCode() * recTrackNt->fCharge) == -13) {
	recTrackNt->fPxGen = particle->Px();
	recTrackNt->fPyGen = particle->Py();
	recTrackNt->fPzGen = particle->Pz();
      }
    }
  } // for (trackIndex = 0;...

  ntuple->Fill();

  return;
}

void MUONrecoNtuple (Int_t FirstEvent = 0, Int_t LastEvent = 0, Int_t RecGeantHits = 0, Text_t *FileName = "galice.root", Text_t *BkgGeantFileName = "")
{
  //
  cout << "MUON_recoNtuple" << endl;
  cout << "FirstEvent " << FirstEvent << endl;
  cout << "LastEvent " << LastEvent << endl;
  cout << "RecGeantHits " << RecGeantHits << endl;
  cout << "FileName ``" << FileName << "''" << endl;
  cout << "BkgGeantFileName ``" << BkgGeantFileName << "''" << endl;
//   // Dynamically link some shared libs                    
//   if (gClassTable->GetID("AliRun") < 0) {
//     gROOT->LoadMacro("loadlibs.C");
//     loadlibs();
//   }

  // Connect the Root Galice file containing Geometry, Kine, Hits
  // and eventually RawClusters
  TFile *file = (TFile*) gROOT->GetListOfFiles()->FindObject(FileName);
  if (!file) {
    printf("\n Creating file %s\n", FileName);
    file = new TFile(FileName);
  }
  else printf("\n File %s found in file list\n", FileName);

  // Get AliRun object from file or create it if not on file
  if (!gAlice) {
    gAlice = (AliRun*) file->Get("gAlice");
    if (gAlice) printf("AliRun object found on file\n");
    if (!gAlice) {
      printf("\n Create new gAlice object");
      gAlice = new AliRun("gAlice","Alice test program");
    }
  }

  // Initializations
  // AliMUON *MUON  = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
  AliMUONEventReconstructor *Reco = new AliMUONEventReconstructor();

  Reco->SetRecGeantHits(RecGeantHits);

  // The right place for changing AliMUONEventReconstructor parameters
  // with respect to the default ones
//   Reco->SetMaxSigma2Distance(100.0);
  Reco->SetPrintLevel(10);
//   Reco->SetPrintLevel(1);
//   Reco->SetBendingResolution(0.0);
//   Reco->SetNonBendingResolution(0.0);
  cout << "AliMUONEventReconstructor: actual parameters" << endl;
  Reco->Dump();
//   gObjectTable->Print();

  // Loop over events
  for (Int_t event = FirstEvent; event <= LastEvent; event++) {
    cout << "Event: " << event << endl;
//     AliMUON *MUON  = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
    Int_t nparticles = gAlice->GetEvent(event);
    cout << "nparticles: " << nparticles << endl;
    // prepare background file and/or event if necessary
    if (RecGeantHits == 1) {
      if (event == FirstEvent) Reco->SetBkgGeantFile(BkgGeantFileName);
      if (Reco->GetBkgGeantFile())Reco->NextBkgGeantEvent();
    }
    Reco->EventReconstruct();
    // Dump current event
    Reco->EventDump();
    // Fill Ntuple
    AliMUONEventRecNtupleFill(Reco, 0);
//     gObjectTable->Print();

  } // Event loop
    // Write Ntuple
    AliMUONEventRecNtupleFill(Reco, -1);
}
Commit	Line	Data
c2a319d4	1	// Macro MUONrecoNtuple.C (TO BE COMPILED)
	2	// for testing the C++ reconstruction code
	3	// and producing an Ntuple with reconstructed tracks
	4	// in output file "MUONtrackReco.root".
	5	// An example for using the Ntuple is in the macro MUONmassPlot.C
	6
	7	// Arguments:
	8	// FirstEvent (default 0)
	9	// LastEvent (default 0)
	10	// RecGeantHits (1 to reconstruct GEANT hits) (default 0)
	11	// FileName (for signal) (default "galice.root")
	12	// BkgGeantFileName (for background),
	13	// needed only if RecGeantHits = 1 and background to be added
	14
	15	// IMPORTANT NOTICE FOR USERS:
	16	// under "root" or "root.exe", execute the following commands:
	17	// 1. "gSystem->SetIncludePath("-I$ALICE_ROOT/MUON -I$ALICE_ROOT/STEER -I$ROOTSYS/include")" to get the right path at compilation time
	18	// 2. ".x loadlibs.C" to load the shared libraries
	19	// 3. ".x MUONrecoNtuple.C+()" with the right arguments, without forgetting the "+" which implies the compilation of the macro before its execution
	20
	21	#include <iostream.h>
	22
	23	#include <TClassTable.h>
	24	#include <TClonesArray.h>
	25	#include <TFile.h>
	26	#include <TParticle.h>
	27	#include <TROOT.h>
	28	#include <TTree.h>
	29
	30	#include "AliRun.h"
	31
	32	#include "AliMUONEventReconstructor.h"
	33	#include "AliMUONTrack.h"
	34	#include "AliMUONTrackHit.h"
	35	#include "AliMUONTrackParam.h"
	36
	37	// Classes for Ntuple ////////////////////////////////////////////////////
	38
	39	class AliMUONTrackRecNtuple : public TObject {
	40	public:
	41	// for direct access to members
	42	Int_t fCharge; // charge of reconstructed track (+/- 1)
	43	Float_t fPxRec; // Px of reconstructed track at vertex (GeV/c)
	44	Float_t fPyRec; // Py of reconstructed track at vertex (GeV/c)
	45	Float_t fPzRec; // Pz of reconstructed track at vertex (GeV/c)
	46	Float_t fZRec; // Z of reconstructed track at vertex (cm)
	47	Float_t fZRec1; // Z of reconstructed track at first hit (cm)
	48	Int_t fNHits; // number of hits
	49	Float_t fChi2; // chi2 of fit
	50	Float_t fPxGen; // Px of best compatible generated track at vertex (GeV/c)
	51	Float_t fPyGen; // Py of best compatible generated track at vertex (GeV/c)
	52	Float_t fPzGen; // Pz of best compatible generated track at vertex (GeV/c)
	53	AliMUONTrackRecNtuple(){;} // Constructor
	54	virtual ~AliMUONTrackRecNtuple(){;} // Destructor
	55	protected:
	56	private:
	57	ClassDef(AliMUONTrackRecNtuple, 1) // AliMUONTrackRecNtuple
	58	};
	59
	60	class AliMUONHeaderRecNtuple : public TObject {
	61	public:
	62	// for direct access to members
	63	Int_t fEvent; // event number
	64	AliMUONHeaderRecNtuple(){;} // Constructor
65	virtual ~AliMUONHeaderRecNtuple(){;} // Destructor
66	protected:
67	private:
68	ClassDef(AliMUONHeaderRecNtuple, 1) // AliMUONHeaderRecNtuple
69	};
70
71	ClassImp(AliMUONTrackRecNtuple) // Class implementation in ROOT context
72	ClassImp(AliMUONHeaderRecNtuple) // Class implementation in ROOT context
73
74	//__________________________________________________________________________
75	void AliMUONEventRecNtupleFill(AliMUONEventReconstructor *Reco, Int_t FillWrite = 0)
76	{
77	// Fill Ntuple for reconstructed event pointed to by "Reco"
78	// if "FillWrite" different from -1.
79	// Ntuple is created automatically before filling first event.
80	// If "FillWrite" = -1, write and close the file
81
82	static Bool_t firstTime = kTRUE;
83	static TTree *ntuple;
84	static AliMUONHeaderRecNtuple *header = new AliMUONHeaderRecNtuple();
85	static TClonesArray *recTracks = new TClonesArray("AliMUONTrackRecNtuple",5);
86
87	Int_t trackIndex;
88	AliMUONTrack *track;
89	AliMUONTrackParam *trackParam;
90	AliMUONTrackRecNtuple *recTrackNt;
91	Double_t bendingSlope, nonBendingSlope, pYZ;
92
93	if (FillWrite == -1) {
94	// better to create the file before the Ntuple ????
95	TFile *file = new TFile("MUONtrackReco.root","recreate");
96	ntuple->Write();
97	file->Write();
98	file->Close();
99	}
100
101	if (firstTime) {
102	firstTime = kFALSE;
103	// first call: create tree for Ntuple...
104	ntuple = new TTree("MUONtrackReco", "MUONtrackReco");
105	ntuple->Branch("Header","AliMUONHeaderRecNtuple", &header);
106	ntuple->Branch("Tracks", &recTracks);
107	}
108
109	// header
110	header->fEvent = gAlice->GetHeader()->GetEvent();
111
112	TClonesArray *recoTracksPtr = Reco->GetRecTracksPtr();
113	recoTracksPtr->Compress(); // for simple loop without "Next" since no hole
114	recTracks->Clear(); // to reset the TClonesArray of tracks to be put in the ntuple
115	// Loop over reconstructed tracks
116	for (trackIndex = 0; trackIndex < Reco->GetNRecTracks(); trackIndex++) {
117	track = (AliMUONTrack) ((recoTracksPtr)[trackIndex]);
118	recTrackNt = (AliMUONTrackRecNtuple*)
119	new ((*recTracks)[trackIndex]) AliMUONTrackRecNtuple();
120	// track parameters at Vertex
121	trackParam = track->GetTrackParamAtVertex();
122	recTrackNt->fCharge =
123	Int_t(TMath::Sign(1., trackParam->GetInverseBendingMomentum()));
124	bendingSlope = trackParam->GetBendingSlope();
125	nonBendingSlope = trackParam->GetNonBendingSlope();
126	pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum());
127	recTrackNt->fPzRec = pYZ / TMath::Sqrt(1.0 + bendingSlope * bendingSlope);
128	recTrackNt->fPxRec = recTrackNt->fPzRec * nonBendingSlope;
129	recTrackNt->fPyRec = recTrackNt->fPzRec * bendingSlope;
130	recTrackNt->fZRec = trackParam->GetZ();
131	// track parameters at first hit
132	trackParam = ((AliMUONTrackHit*)
133	(track->GetTrackHitsPtr()->First()))->GetTrackParam();
134	recTrackNt->fZRec1 = trackParam->GetZ();
135	// chi2
136	recTrackNt->fChi2 = track->GetFitFMin();
137	// number of hits
138	recTrackNt->fNHits = track->GetNTrackHits();
139	// track parameters at vertex of best compatible generated track:
140	// in fact muon with the right charge
141	for (int iPart = 0; iPart < gAlice->Particles()->GetEntriesFast(); iPart++) {
142	TParticle particle = (TParticle) gAlice->Particles()->UncheckedAt(iPart);
143	if ((particle->GetPdgCode() * recTrackNt->fCharge) == -13) {
144	recTrackNt->fPxGen = particle->Px();
145	recTrackNt->fPyGen = particle->Py();
146	recTrackNt->fPzGen = particle->Pz();
147	}
148	}
149	} // for (trackIndex = 0;...
150
151	ntuple->Fill();
152
153	return;
154	}
155
156	void MUONrecoNtuple (Int_t FirstEvent = 0, Int_t LastEvent = 0, Int_t RecGeantHits = 0, Text_t FileName = "galice.root", Text_t BkgGeantFileName = "")
157	{
158	//
159	cout << "MUON_recoNtuple" << endl;
160	cout << "FirstEvent " << FirstEvent << endl;
161	cout << "LastEvent " << LastEvent << endl;
162	cout << "RecGeantHits " << RecGeantHits << endl;
163	cout << "FileName ``" << FileName << "''" << endl;
164	cout << "BkgGeantFileName ``" << BkgGeantFileName << "''" << endl;
165	// // Dynamically link some shared libs
166	// if (gClassTable->GetID("AliRun") < 0) {
167	// gROOT->LoadMacro("loadlibs.C");
168	// loadlibs();
169	// }
170
171	// Connect the Root Galice file containing Geometry, Kine, Hits
172	// and eventually RawClusters
173	TFile file = (TFile) gROOT->GetListOfFiles()->FindObject(FileName);
174	if (!file) {
175	printf("\n Creating file %s\n", FileName);
176	file = new TFile(FileName);
177	}
178	else printf("\n File %s found in file list\n", FileName);
179
180	// Get AliRun object from file or create it if not on file
181	if (!gAlice) {
182	gAlice = (AliRun*) file->Get("gAlice");
183	if (gAlice) printf("AliRun object found on file\n");
184	if (!gAlice) {
185	printf("\n Create new gAlice object");
186	gAlice = new AliRun("gAlice","Alice test program");
187	}
188	}
189
190	// Initializations
191	// AliMUON MUON = (AliMUON) gAlice->GetModule("MUON"); // necessary ????
192	AliMUONEventReconstructor *Reco = new AliMUONEventReconstructor();
193
194	Reco->SetRecGeantHits(RecGeantHits);
195
196	// The right place for changing AliMUONEventReconstructor parameters
197	// with respect to the default ones
198	// Reco->SetMaxSigma2Distance(100.0);
199	Reco->SetPrintLevel(10);
200	// Reco->SetPrintLevel(1);
201	// Reco->SetBendingResolution(0.0);
202	// Reco->SetNonBendingResolution(0.0);
203	cout << "AliMUONEventReconstructor: actual parameters" << endl;
204	Reco->Dump();
205	// gObjectTable->Print();
206
207	// Loop over events
208	for (Int_t event = FirstEvent; event <= LastEvent; event++) {
209	cout << "Event: " << event << endl;
210	// AliMUON MUON = (AliMUON) gAlice->GetModule("MUON"); // necessary ????
211	Int_t nparticles = gAlice->GetEvent(event);
212	cout << "nparticles: " << nparticles << endl;
213	// prepare background file and/or event if necessary
214	if (RecGeantHits == 1) {
215	if (event == FirstEvent) Reco->SetBkgGeantFile(BkgGeantFileName);
216	if (Reco->GetBkgGeantFile())Reco->NextBkgGeantEvent();
217	}
218	Reco->EventReconstruct();
219	// Dump current event
220	Reco->EventDump();
221	// Fill Ntuple
222	AliMUONEventRecNtupleFill(Reco, 0);
223	// gObjectTable->Print();
224
225	} // Event loop
226	// Write Ntuple
227	AliMUONEventRecNtupleFill(Reco, -1);
228	}