1 //========================================================================
2 // Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
4 // Author: The ALICE Off-line Project.
5 // Contributors are mentioned in the code where appropriate.
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 //========================================================================
16 // Class AliEMCALTracker
17 // -----------------------
18 // Implementation of the track matching method between barrel tracks and
20 // Besides algorithm implementation, some cuts are required to be set
21 // in order to define, for each track, an acceptance window where clusters
22 // are searched to find best match (if any).
23 // The class accepts as input an ESD container, and works directly on it,
24 // simply setting, for each of its tracks, the fEMCALindex flag, for each
25 // track which is matched to a cluster.
26 // In order to use method, one must launch PropagateBack().
28 // ------------------------------------------------------------------------
29 // author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
30 // Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch)
31 //=========================================================================
33 #include <Riostream.h>
41 #include <TClonesArray.h>
42 #include <TGeoMatrix.h>
45 #include "AliESDEvent.h"
46 #include "AliESDtrack.h"
47 #include "AliESDCaloCluster.h"
48 #include "AliEMCALRecPoint.h"
49 #include "AliRunLoader.h"
50 #include "AliEMCALTrack.h"
51 #include "AliEMCALLoader.h"
52 #include "AliEMCALGeometry.h"
53 #include "AliEMCALReconstructor.h"
54 #include "AliEMCALRecParam.h"
55 #include "AliCDBEntry.h"
56 #include "AliCDBManager.h"
57 #include "AliEMCALReconstructor.h"
58 #include "AliEMCALRecoUtils.h"
60 #include "AliEMCALTracker.h"
64 ClassImp(AliEMCALTracker)
67 //------------------------------------------------------------------------------
69 AliEMCALTracker::AliEMCALTracker()
75 fTrackCorrMode(kTrackCorrMMB),
84 // Default constructor.
85 // Initializes all simple data members to default values,
86 // and all collections to NULL.
87 // Output file name is set to a default value.
92 //------------------------------------------------------------------------------
94 AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
97 fCutNITS(copy.fCutNITS),
98 fCutNTPC(copy.fCutNTPC),
100 fTrackCorrMode(copy.fTrackCorrMode),
101 fClusterWindow(copy.fClusterWindow),
102 fCutEta(copy.fCutEta),
103 fCutPhi(copy.fCutPhi),
104 fTracks((TObjArray*)copy.fTracks->Clone()),
105 fClusters((TObjArray*)copy.fClusters->Clone()),
110 // Besides copying all parameters, duplicates all collections.
114 //------------------------------------------------------------------------------
116 AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source)
117 { // assignment operator; use copy ctor
118 if (&source == this) return *this;
120 new (this) AliEMCALTracker(source);
124 //------------------------------------------------------------------------------
126 void AliEMCALTracker::InitParameters()
129 // Retrieve initialization parameters
132 // Check if the instance of AliEMCALRecParam exists,
133 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
136 AliFatal("Reconstruction parameters for EMCAL not set!");
140 fCutEta = recParam->GetMthCutEta();
141 fCutPhi = recParam->GetMthCutPhi();
142 fStep = recParam->GetExtrapolateStep();
143 fCutPt = recParam->GetTrkCutPt();
144 fCutNITS = recParam->GetTrkCutNITS();
145 fCutNTPC = recParam->GetTrkCutNTPC();
151 //------------------------------------------------------------------------------
153 void AliEMCALTracker::Clear(Option_t* option)
157 // Deletes all objects in arrays and the arrays themselves
161 Bool_t clearTracks = opt.Contains("TRACKS");
162 Bool_t clearClusters = opt.Contains("CLUSTERS");
163 if (opt.Contains("ALL")) {
165 clearClusters = kTRUE;
168 //fTracks is a collection of esdTrack
169 //When clearing this array, the linked objects should not be deleted
170 if (fTracks != 0x0 && clearTracks) {
175 if (fClusters != 0x0 && clearClusters) {
182 //------------------------------------------------------------------------------
184 Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
187 // Load EMCAL clusters in the form of AliEMCALRecPoint,
188 // from simulation temporary files.
189 // (When included in reconstruction chain, this method is used automatically)
194 cTree->SetBranchStatus("*",0); //disable all branches
195 cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need
197 TBranch *branch = cTree->GetBranch("EMCALECARP");
199 AliError("Can't get the branch with the EMCAL clusters");
203 TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
204 branch->SetAddress(&clusters);
206 //cTree->GetEvent(0);
208 Int_t nClusters = (Int_t)clusters->GetEntries();
209 if(fClusters) fClusters->Delete();
210 else fClusters = new TObjArray(0);
211 for (Int_t i = 0; i < nClusters; i++) {
212 AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i);
213 if (!cluster) continue;
214 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
215 fClusters->AddLast(matchCluster);
218 branch->SetAddress(0);
222 AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries()));
227 //------------------------------------------------------------------------------
229 Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
232 // Load EMCAL clusters in the form of AliESDCaloClusters,
233 // from an AliESD object.
236 // make sure that tracks/clusters collections are empty
238 fClusters = new TObjArray(0);
240 Int_t nClusters = esd->GetNumberOfCaloClusters();
241 for (Int_t i=0; i<nClusters; i++)
243 AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
244 if (!cluster || !cluster->IsEMCAL()) continue ;
245 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
246 fClusters->AddLast(matchCluster);
249 AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
253 //------------------------------------------------------------------------------
255 Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
262 fTracks = new TObjArray(0);
264 Int_t nTracks = esd->GetNumberOfTracks();
265 //Bool_t isKink=kFALSE;
266 for (Int_t i = 0; i < nTracks; i++)
268 AliESDtrack *esdTrack = esd->GetTrack(i);
269 // set by default the value corresponding to "no match"
270 esdTrack->SetEMCALcluster(kUnmatched);
271 esdTrack->ResetStatus(AliESDtrack::kEMCALmatch);
273 //Select good quaulity tracks
274 if(esdTrack->Pt()<fCutPt) continue;
275 if(esdTrack->GetNcls(1)<fCutNTPC)continue;
277 //Loose geometric cut
278 Double_t phi = esdTrack->Phi()*TMath::RadToDeg();
279 if(TMath::Abs(esdTrack->Eta())>0.8 || phi <= 20 || phi >= 240 ) continue;
281 fTracks->AddLast(esdTrack);
284 AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
288 //------------------------------------------------------------------------------
290 void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
293 // Set track correction mode
294 // gest the choice in string format and converts into
301 if (!opt.CompareTo("NONE"))
303 fTrackCorrMode = kTrackCorrNone;
305 else if (!opt.CompareTo("MMB"))
307 fTrackCorrMode = kTrackCorrMMB;
311 cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
315 //------------------------------------------------------------------------------
317 Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
320 // Main operation method.
321 // Gets external AliESD containing tracks to be matched.
322 // After executing match finding, stores in the same ESD object all infos
323 // and releases the object for further reconstruction steps.
326 // Note: should always return 0=OK, because otherwise all tracking
327 // is aborted for this event
330 AliError("NULL ESD passed");
334 // step 1: collect clusters
335 Int_t okLoadClusters, nClusters;
336 if (!fClusters || (fClusters && fClusters->IsEmpty())) {
337 okLoadClusters = LoadClusters(esd);
339 nClusters = fClusters->GetEntries();
341 // step 2: collect ESD tracks
342 Int_t nTracks, okLoadTracks;
343 okLoadTracks = LoadTracks(esd);
344 nTracks = fTracks->GetEntries();
346 // step 3: for each track, find the closest cluster as matched within residual cuts
348 for (Int_t it = 0; it < nTracks; it++)
350 AliESDtrack *track = (AliESDtrack*)fTracks->At(it);
351 index = FindMatchedCluster(track);
354 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(index);
355 track->SetEMCALcluster(cluster->Index());
356 track->SetStatus(AliESDtrack::kEMCALmatch);
364 //------------------------------------------------------------------------------
366 Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track)
369 // For each track, extrapolate it to all the clusters
370 // Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts
373 Float_t maxEta=fCutEta;
374 Float_t maxPhi=fCutPhi;
377 // If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation
378 // Otherwise use the TPCInner point
379 AliExternalTrackParam *trkParam = 0;
380 const AliESDfriendTrack* friendTrack = track->GetFriendTrack();
381 if(friendTrack && friendTrack->GetTPCOut())
382 trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
384 trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
385 if(!trkParam) return index;
388 AliExternalTrackParam trkParamTmp(*trkParam);
390 if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, 430., track->GetMass(kTRUE), fStep, eta, phi)) return index;
391 track->SetTrackPhiEtaOnEMCal(phi,eta);
392 if(TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()) return index;
394 //Perform extrapolation
396 trkParamTmp.GetXYZ(trkPos);
397 Int_t nclusters = fClusters->GetEntries();
398 for(Int_t ic=0; ic<nclusters; ic++)
400 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
401 Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()};
402 Double_t dR = TMath::Sqrt(TMath::Power(trkPos[0]-clsPos[0],2)+TMath::Power(trkPos[1]-clsPos[1],2)+TMath::Power(trkPos[2]-clsPos[2],2));
403 if(dR > fClusterWindow) continue;
405 AliExternalTrackParam trkParTmp(trkParamTmp);
407 Float_t tmpEta, tmpPhi;
408 if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue;
409 if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta))
420 //------------------------------------------------------------------------------
422 void AliEMCALTracker::UnloadClusters()
425 // Free memory from all arrays
426 // This method is called after the local tracking step
427 // so we can safely delete everything
434 //------------------------------------------------------------------------------
436 AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
443 // Translates an AliEMCALRecPoint object into the internal format.
444 // Index of passed cluster in its native array must be specified.
447 recPoint->GetGlobalPosition(clpos);
454 //------------------------------------------------------------------------------
456 AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
463 // Translates an AliESDCaloCluster object into the internal format.
464 // Index of passed cluster in its native array must be specified.
466 Float_t clpos[3]= {0., 0., 0.};
467 caloCluster->GetPosition(clpos);
469 fX = (Double_t)clpos[0];
470 fY = (Double_t)clpos[1];
471 fZ = (Double_t)clpos[2];