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"
62 ClassImp(AliEMCALTracker)
65 //------------------------------------------------------------------------------
67 AliEMCALTracker::AliEMCALTracker()
73 fTrackCorrMode(kTrackCorrMMB),
82 // Default constructor.
83 // Initializes all simple data members to default values,
84 // and all collections to NULL.
85 // Output file name is set to a default value.
90 //------------------------------------------------------------------------------
92 AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy)
95 fCutNITS(copy.fCutNITS),
96 fCutNTPC(copy.fCutNTPC),
98 fTrackCorrMode(copy.fTrackCorrMode),
99 fClusterWindow(copy.fClusterWindow),
100 fCutEta(copy.fCutEta),
101 fCutPhi(copy.fCutPhi),
102 fTracks((TObjArray*)copy.fTracks->Clone()),
103 fClusters((TObjArray*)copy.fClusters->Clone()),
108 // Besides copying all parameters, duplicates all collections.
112 //------------------------------------------------------------------------------
114 AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source)
115 { // assignment operator; use copy ctor
116 if (&source == this) return *this;
118 new (this) AliEMCALTracker(source);
122 //------------------------------------------------------------------------------
124 void AliEMCALTracker::InitParameters()
127 // Retrieve initialization parameters
130 // Check if the instance of AliEMCALRecParam exists,
131 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
134 AliFatal("Reconstruction parameters for EMCAL not set!");
138 fCutEta = recParam->GetMthCutEta();
139 fCutPhi = recParam->GetMthCutPhi();
140 fStep = recParam->GetExtrapolateStep();
141 fCutPt = recParam->GetTrkCutPt();
142 fCutNITS = recParam->GetTrkCutNITS();
143 fCutNTPC = recParam->GetTrkCutNTPC();
149 //------------------------------------------------------------------------------
151 void AliEMCALTracker::Clear(Option_t* option)
155 // Deletes all objects in arrays and the arrays themselves
159 Bool_t clearTracks = opt.Contains("TRACKS");
160 Bool_t clearClusters = opt.Contains("CLUSTERS");
161 if (opt.Contains("ALL")) {
163 clearClusters = kTRUE;
166 //fTracks is a collection of esdTrack
167 //When clearing this array, the linked objects should not be deleted
168 if (fTracks != 0x0 && clearTracks) {
173 if (fClusters != 0x0 && clearClusters) {
180 //------------------------------------------------------------------------------
182 Int_t AliEMCALTracker::LoadClusters(TTree *cTree)
185 // Load EMCAL clusters in the form of AliEMCALRecPoint,
186 // from simulation temporary files.
187 // (When included in reconstruction chain, this method is used automatically)
192 cTree->SetBranchStatus("*",0); //disable all branches
193 cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need
195 TBranch *branch = cTree->GetBranch("EMCALECARP");
197 AliError("Can't get the branch with the EMCAL clusters");
201 TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000);
202 branch->SetAddress(&clusters);
204 //cTree->GetEvent(0);
206 Int_t nClusters = (Int_t)clusters->GetEntries();
207 if(fClusters) fClusters->Delete();
208 else fClusters = new TObjArray(0);
209 for (Int_t i = 0; i < nClusters; i++) {
210 AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i);
211 if (!cluster) continue;
212 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
213 fClusters->AddLast(matchCluster);
216 branch->SetAddress(0);
220 AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries()));
225 //------------------------------------------------------------------------------
227 Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd)
230 // Load EMCAL clusters in the form of AliESDCaloClusters,
231 // from an AliESD object.
234 // make sure that tracks/clusters collections are empty
236 fClusters = new TObjArray(0);
238 Int_t nClusters = esd->GetNumberOfCaloClusters();
239 for (Int_t i=0; i<nClusters; i++)
241 AliESDCaloCluster *cluster = esd->GetCaloCluster(i);
242 if (!cluster || !cluster->IsEMCAL()) continue ;
243 AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster);
244 fClusters->AddLast(matchCluster);
247 AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries()));
251 //------------------------------------------------------------------------------
253 Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd)
260 fTracks = new TObjArray(0);
262 Int_t nTracks = esd->GetNumberOfTracks();
263 //Bool_t isKink=kFALSE;
264 for (Int_t i = 0; i < nTracks; i++)
266 AliESDtrack *esdTrack = esd->GetTrack(i);
267 // set by default the value corresponding to "no match"
268 esdTrack->SetEMCALcluster(kUnmatched);
269 esdTrack->ResetStatus(AliESDtrack::kEMCALmatch);
271 //Select good quaulity tracks
272 if(esdTrack->Pt()<fCutPt) continue;
273 if(esdTrack->GetNcls(1)<fCutNTPC)continue;
275 //Loose geometric cut
276 Double_t phi = esdTrack->Phi()*TMath::RadToDeg();
277 if(TMath::Abs(esdTrack->Eta())>0.8 || phi <= 20 || phi >= 240 ) continue;
279 fTracks->AddLast(esdTrack);
282 AliInfo(Form("Collected %d tracks", fTracks->GetEntries()));
286 //------------------------------------------------------------------------------
288 void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option)
291 // Set track correction mode
292 // gest the choice in string format and converts into
299 if (!opt.CompareTo("NONE"))
301 fTrackCorrMode = kTrackCorrNone;
303 else if (!opt.CompareTo("MMB"))
305 fTrackCorrMode = kTrackCorrMMB;
309 cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl;
313 //------------------------------------------------------------------------------
315 Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd)
318 // Main operation method.
319 // Gets external AliESD containing tracks to be matched.
320 // After executing match finding, stores in the same ESD object all infos
321 // and releases the object for further reconstruction steps.
324 // Note: should always return 0=OK, because otherwise all tracking
325 // is aborted for this event
328 AliError("NULL ESD passed");
332 // step 1: collect clusters
333 Int_t okLoadClusters, nClusters;
334 if (!fClusters || (fClusters && fClusters->IsEmpty())) {
335 okLoadClusters = LoadClusters(esd);
337 nClusters = fClusters->GetEntries();
339 // step 2: collect ESD tracks
340 Int_t nTracks, okLoadTracks;
341 okLoadTracks = LoadTracks(esd);
342 nTracks = fTracks->GetEntries();
344 // step 3: for each track, find the closest cluster as matched within residual cuts
346 for (Int_t it = 0; it < nTracks; it++)
348 AliESDtrack *track = (AliESDtrack*)fTracks->At(it);
349 index = FindMatchedCluster(track);
352 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(index);
353 track->SetEMCALcluster(cluster->Index());
354 track->SetStatus(AliESDtrack::kEMCALmatch);
362 //------------------------------------------------------------------------------
364 Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track)
367 // For each track, extrapolate it to all the clusters
368 // Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts
371 Float_t maxEta=fCutEta;
372 Float_t maxPhi=fCutPhi;
375 // If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation
376 // Otherwise use the TPCInner point
377 AliExternalTrackParam *trkParam = 0;
378 const AliESDfriendTrack* friendTrack = track->GetFriendTrack();
379 if(friendTrack && friendTrack->GetTPCOut())
380 trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut());
382 trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam());
383 if(!trkParam) return index;
386 AliExternalTrackParam trkParamTmp(*trkParam);
388 if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, 430., track->GetMass(kTRUE), fStep, eta, phi)) return index;
389 track->SetTrackPhiEtaOnEMCal(phi,eta);
390 if(TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()) return index;
392 //Perform extrapolation
394 trkParamTmp.GetXYZ(trkPos);
395 Int_t nclusters = fClusters->GetEntries();
396 for(Int_t ic=0; ic<nclusters; ic++)
398 AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic);
399 Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()};
400 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));
401 if(dR > fClusterWindow) continue;
403 AliExternalTrackParam trkParTmp(trkParamTmp);
405 Float_t tmpEta, tmpPhi;
406 if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue;
407 if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta))
418 //------------------------------------------------------------------------------
420 void AliEMCALTracker::UnloadClusters()
423 // Free memory from all arrays
424 // This method is called after the local tracking step
425 // so we can safely delete everything
432 //------------------------------------------------------------------------------
434 AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint)
441 // Translates an AliEMCALRecPoint object into the internal format.
442 // Index of passed cluster in its native array must be specified.
445 recPoint->GetGlobalPosition(clpos);
452 //------------------------------------------------------------------------------
454 AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster)
461 // Translates an AliESDCaloCluster object into the internal format.
462 // Index of passed cluster in its native array must be specified.
464 Float_t clpos[3]= {0., 0., 0.};
465 caloCluster->GetPosition(clpos);
467 fX = (Double_t)clpos[0];
468 fY = (Double_t)clpos[1];
469 fZ = (Double_t)clpos[2];