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1 | //======================================================================== | |
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 | //======================================================================== | |
15 | // | |
16 | // Class AliEMCALTracker | |
17 | // ----------------------- | |
18 | // Implementation of the track matching method between barrel tracks and | |
19 | // EMCAL clusters. | |
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(). | |
27 | // | |
28 | // ------------------------------------------------------------------------ | |
29 | // author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it) | |
30 | // Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch) | |
31 | //========================================================================= | |
32 | ||
33 | #include <Riostream.h> | |
34 | #include <iomanip> | |
35 | ||
36 | #include <TFile.h> | |
37 | #include <TTree.h> | |
38 | #include <TList.h> | |
39 | #include <TString.h> | |
40 | #include <TVector3.h> | |
41 | #include <TClonesArray.h> | |
42 | #include <TGeoMatrix.h> | |
43 | ||
44 | #include "AliLog.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" | |
59 | ||
60 | #include "AliEMCALTracker.h" | |
61 | ||
62 | using std::cerr; | |
63 | using std::endl; | |
64 | ClassImp(AliEMCALTracker) | |
65 | ||
66 | // | |
67 | //------------------------------------------------------------------------------ | |
68 | // | |
69 | AliEMCALTracker::AliEMCALTracker() : | |
70 | AliTracker(), | |
71 | fCutPt(0), | |
72 | fCutNITS(0), | |
73 | fCutNTPC(50), | |
74 | fStep(20), | |
75 | fTrackCorrMode(kTrackCorrMMB), | |
76 | fEMCalSurfaceDistance(440), | |
77 | fClusterWindow(50), | |
78 | fCutEta(0.025), | |
79 | fCutPhi(0.05), | |
80 | fITSTrackSA(kFALSE), | |
81 | fTracks(0), | |
82 | fClusters(0), | |
83 | fGeom(0) | |
84 | { | |
85 | // | |
86 | // Default constructor. | |
87 | // Initializes all simple data members to default values, | |
88 | // and all collections to NULL. | |
89 | // Output file name is set to a default value. | |
90 | // | |
91 | InitParameters(); | |
92 | } | |
93 | // | |
94 | //------------------------------------------------------------------------------ | |
95 | // | |
96 | AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy) : | |
97 | AliTracker(), | |
98 | fCutPt(copy.fCutPt), | |
99 | fCutNITS(copy.fCutNITS), | |
100 | fCutNTPC(copy.fCutNTPC), | |
101 | fStep(copy.fStep), | |
102 | fTrackCorrMode(copy.fTrackCorrMode), | |
103 | fEMCalSurfaceDistance(copy.fEMCalSurfaceDistance), | |
104 | fClusterWindow(copy.fClusterWindow), | |
105 | fCutEta(copy.fCutEta), | |
106 | fCutPhi(copy.fCutPhi), | |
107 | fITSTrackSA(copy.fITSTrackSA), | |
108 | fTracks((TObjArray*)copy.fTracks->Clone()), | |
109 | fClusters((TObjArray*)copy.fClusters->Clone()), | |
110 | fGeom(copy.fGeom) | |
111 | { | |
112 | // | |
113 | // Copy constructor | |
114 | // Besides copying all parameters, duplicates all collections. | |
115 | // | |
116 | } | |
117 | // | |
118 | //------------------------------------------------------------------------------ | |
119 | // | |
120 | AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source) | |
121 | { // assignment operator; use copy ctor | |
122 | if (&source == this) return *this; | |
123 | ||
124 | new (this) AliEMCALTracker(source); | |
125 | return *this; | |
126 | } | |
127 | // | |
128 | //------------------------------------------------------------------------------ | |
129 | // | |
130 | void AliEMCALTracker::InitParameters() | |
131 | { | |
132 | // | |
133 | // Retrieve initialization parameters | |
134 | // | |
135 | ||
136 | // Check if the instance of AliEMCALRecParam exists, | |
137 | const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam(); | |
138 | ||
139 | if (!recParam) { | |
140 | AliFatal("Reconstruction parameters for EMCAL not set!"); | |
141 | } else { | |
142 | fCutEta = recParam->GetMthCutEta(); | |
143 | fCutPhi = recParam->GetMthCutPhi(); | |
144 | fStep = recParam->GetExtrapolateStep(); | |
145 | fCutPt = recParam->GetTrkCutPt(); | |
146 | fCutNITS = recParam->GetTrkCutNITS(); | |
147 | fCutNTPC = recParam->GetTrkCutNTPC(); | |
148 | } | |
149 | } | |
150 | // | |
151 | //------------------------------------------------------------------------------ | |
152 | // | |
153 | void AliEMCALTracker::Clear(Option_t* option) | |
154 | { | |
155 | // | |
156 | // Clearing method | |
157 | // Deletes all objects in arrays and the arrays themselves | |
158 | // | |
159 | ||
160 | TString opt(option); | |
161 | Bool_t clearTracks = opt.Contains("TRACKS"); | |
162 | Bool_t clearClusters = opt.Contains("CLUSTERS"); | |
163 | if (opt.Contains("ALL")) { | |
164 | clearTracks = kTRUE; | |
165 | clearClusters = kTRUE; | |
166 | } | |
167 | ||
168 | //fTracks is a collection of esdTrack | |
169 | //When clearing this array, the linked objects should not be deleted | |
170 | if (fTracks != 0x0 && clearTracks) { | |
171 | fTracks->Clear(); | |
172 | delete fTracks; | |
173 | fTracks = 0; | |
174 | } | |
175 | if (fClusters != 0x0 && clearClusters) { | |
176 | fClusters->Delete(); | |
177 | delete fClusters; | |
178 | fClusters = 0; | |
179 | } | |
180 | } | |
181 | // | |
182 | //------------------------------------------------------------------------------ | |
183 | // | |
184 | Int_t AliEMCALTracker::LoadClusters(TTree *cTree) | |
185 | { | |
186 | // | |
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) | |
190 | // | |
191 | ||
192 | Clear("CLUSTERS"); | |
193 | ||
194 | cTree->SetBranchStatus("*",0); //disable all branches | |
195 | cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need | |
196 | ||
197 | TBranch *branch = cTree->GetBranch("EMCALECARP"); | |
198 | if (!branch) { | |
199 | AliError("Can't get the branch with the EMCAL clusters"); | |
200 | return 1; | |
201 | } | |
202 | ||
203 | TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000); | |
204 | branch->SetAddress(&clusters); | |
205 | ||
206 | //cTree->GetEvent(0); | |
207 | branch->GetEntry(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); | |
216 | } | |
217 | ||
218 | branch->SetAddress(0); | |
219 | clusters->Delete(); | |
220 | delete clusters; | |
221 | ||
222 | AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries())); | |
223 | ||
224 | return 0; | |
225 | } | |
226 | // | |
227 | //------------------------------------------------------------------------------ | |
228 | // | |
229 | Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd) | |
230 | { | |
231 | // | |
232 | // Load EMCAL clusters in the form of AliESDCaloClusters, | |
233 | // from an AliESD object. | |
234 | // | |
235 | ||
236 | // make sure that tracks/clusters collections are empty | |
237 | Clear("CLUSTERS"); | |
238 | fClusters = new TObjArray(0); | |
239 | ||
240 | Int_t nClusters = esd->GetNumberOfCaloClusters(); | |
241 | for (Int_t i=0; i<nClusters; i++) { | |
242 | AliESDCaloCluster *cluster = esd->GetCaloCluster(i); | |
243 | if (!cluster || !cluster->IsEMCAL()) continue ; | |
244 | AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster); | |
245 | fClusters->AddLast(matchCluster); | |
246 | } | |
247 | ||
248 | AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries())); | |
249 | return 0; | |
250 | } | |
251 | // | |
252 | //------------------------------------------------------------------------------ | |
253 | // | |
254 | Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd) | |
255 | { | |
256 | // | |
257 | // Load ESD tracks. | |
258 | // | |
259 | ||
260 | UInt_t mask1 = esd->GetESDRun()->GetDetectorsInDAQ(); | |
261 | UInt_t mask2 = esd->GetESDRun()->GetDetectorsInReco(); | |
262 | Bool_t desc1 = (mask1 >> 3) & 0x1; | |
263 | Bool_t desc2 = (mask2 >> 3) & 0x1; | |
264 | if (desc1==0 || desc2==0) { | |
265 | // AliError(Form("TPC not in DAQ/RECO: %u (%u)/%u (%u)", | |
266 | // mask1, esd->GetESDRun()->GetDetectorsInReco(), | |
267 | // mask2, esd->GetESDRun()->GetDetectorsInDAQ())); | |
268 | fITSTrackSA = kTRUE; | |
269 | } | |
270 | ||
271 | Clear("TRACKS"); | |
272 | fTracks = new TObjArray(0); | |
273 | ||
274 | Int_t nTracks = esd->GetNumberOfTracks(); | |
275 | //Bool_t isKink=kFALSE; | |
276 | for (Int_t i = 0; i < nTracks; i++) { | |
277 | AliESDtrack *esdTrack = esd->GetTrack(i); | |
278 | // set by default the value corresponding to "no match" | |
279 | esdTrack->SetEMCALcluster(kUnmatched); | |
280 | esdTrack->ResetStatus(AliESDtrack::kEMCALmatch); | |
281 | ||
282 | //Select good quaulity tracks | |
283 | if (esdTrack->Pt()<fCutPt) continue; | |
284 | if (!fITSTrackSA) | |
285 | if (esdTrack->GetNcls(1)<fCutNTPC) continue; | |
286 | ||
287 | //Loose geometric cut | |
288 | Double_t phi = esdTrack->Phi()*TMath::RadToDeg(); | |
289 | if (TMath::Abs(esdTrack->Eta())>0.9 || phi <= 10 || phi >= 250) continue; | |
290 | fTracks->AddLast(esdTrack); | |
291 | } | |
292 | AliInfo(Form("Collected %d tracks", fTracks->GetEntries())); | |
293 | return 0; | |
294 | } | |
295 | // | |
296 | //------------------------------------------------------------------------------ | |
297 | // | |
298 | void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option) | |
299 | { | |
300 | // | |
301 | // Set track correction mode | |
302 | // gest the choice in string format and converts into | |
303 | // internal enum | |
304 | // | |
305 | ||
306 | TString opt(option); | |
307 | opt.ToUpper(); | |
308 | ||
309 | if (!opt.CompareTo("NONE")) { | |
310 | fTrackCorrMode = kTrackCorrNone; | |
311 | } else if (!opt.CompareTo("MMB")) { | |
312 | fTrackCorrMode = kTrackCorrMMB; | |
313 | } else { | |
314 | cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl; | |
315 | } | |
316 | } | |
317 | // | |
318 | //------------------------------------------------------------------------------ | |
319 | // | |
320 | Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd) | |
321 | { | |
322 | // | |
323 | // Main operation method. | |
324 | // Gets external AliESD containing tracks to be matched. | |
325 | // After executing match finding, stores in the same ESD object all infos | |
326 | // and releases the object for further reconstruction steps. | |
327 | // | |
328 | // | |
329 | // Note: should always return 0=OK, because otherwise all tracking | |
330 | // is aborted for this event | |
331 | ||
332 | if (!esd) { | |
333 | AliError("NULL ESD passed"); | |
334 | return 1; | |
335 | } | |
336 | ||
337 | // step 1: collect clusters | |
338 | Int_t okLoadClusters, nClusters; | |
339 | if (!fClusters || (fClusters && fClusters->IsEmpty())) { | |
340 | okLoadClusters = LoadClusters(esd); | |
341 | } | |
342 | nClusters = fClusters->GetEntries(); | |
343 | ||
344 | // step 2: collect ESD tracks | |
345 | Int_t nTracks, okLoadTracks; | |
346 | okLoadTracks = LoadTracks(esd); | |
347 | nTracks = fTracks->GetEntries(); | |
348 | ||
349 | // step 3: for each track, find the closest cluster as matched within residual cuts | |
350 | Int_t index=-1; | |
351 | for (Int_t it = 0; it < nTracks; it++) { | |
352 | AliESDtrack *track = (AliESDtrack*)fTracks->At(it); | |
353 | index = FindMatchedCluster(track); | |
354 | if (index>-1) { | |
355 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(index); | |
356 | track->SetEMCALcluster(cluster->Index()); | |
357 | track->SetStatus(AliESDtrack::kEMCALmatch); | |
358 | } | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | // | |
365 | //------------------------------------------------------------------------------ | |
366 | // | |
367 | Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track) | |
368 | { | |
369 | // | |
370 | // For each track, extrapolate it to all the clusters | |
371 | // Find the closest one as matched if the residuals (dEta, dPhi) satisfy the cuts | |
372 | // | |
373 | ||
374 | Float_t maxEta=fCutEta; | |
375 | Float_t maxPhi=fCutPhi; | |
376 | Int_t index = -1; | |
377 | ||
378 | // If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation | |
379 | // Otherwise use the TPCInner point | |
380 | AliExternalTrackParam *trkParam = 0; | |
381 | ||
382 | if (!fITSTrackSA) { | |
383 | const AliESDfriendTrack* friendTrack = track->GetFriendTrack(); | |
384 | if (friendTrack && friendTrack->GetTPCOut()) | |
385 | trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut()); | |
386 | else if (track->GetInnerParam()) | |
387 | trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam()); | |
388 | } | |
389 | else | |
390 | trkParam = new AliExternalTrackParam(*track); | |
391 | ||
392 | if (!trkParam) return index; | |
393 | ||
394 | AliExternalTrackParam trkParamTmp(*trkParam); | |
395 | Float_t eta, phi, pt; | |
396 | if (!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, fEMCalSurfaceDistance, track->GetMass(kTRUE), fStep, eta, phi, pt)) { | |
397 | if (fITSTrackSA) delete trkParam; | |
398 | return index; | |
399 | } | |
400 | track->SetTrackPhiEtaPtOnEMCal(phi,eta,pt); | |
401 | if (TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()) { | |
402 | if (fITSTrackSA) delete trkParam; | |
403 | return index; | |
404 | } | |
405 | ||
406 | //Perform extrapolation | |
407 | Double_t trkPos[3]; | |
408 | trkParamTmp.GetXYZ(trkPos); | |
409 | Int_t nclusters = fClusters->GetEntries(); | |
410 | for (Int_t ic=0; ic<nclusters; ic++) { | |
411 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic); | |
412 | Float_t clsPos[3] = {cluster->X(),cluster->Y(),cluster->Z()}; | |
413 | 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)); | |
414 | //printf("\n dR=%f,wind=%f\n",dR,fClusterWindow); //MARCEL | |
415 | if (dR > fClusterWindow) continue; | |
416 | ||
417 | AliExternalTrackParam trkParTmp(trkParamTmp); | |
418 | ||
419 | Float_t tmpEta, tmpPhi; | |
420 | if (!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue; | |
421 | if (TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta)) { | |
422 | maxPhi=tmpPhi; | |
423 | maxEta=tmpEta; | |
424 | index=ic; | |
425 | } | |
426 | } | |
427 | ||
428 | if (fITSTrackSA) delete trkParam; | |
429 | return index; | |
430 | } | |
431 | ||
432 | // | |
433 | //------------------------------------------------------------------------------ | |
434 | // | |
435 | void AliEMCALTracker::UnloadClusters() | |
436 | { | |
437 | // | |
438 | // Free memory from all arrays | |
439 | // This method is called after the local tracking step | |
440 | // so we can safely delete everything | |
441 | // | |
442 | ||
443 | Clear(); | |
444 | } | |
445 | ||
446 | // | |
447 | //------------------------------------------------------------------------------ | |
448 | // | |
449 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint) : | |
450 | fIndex(index), | |
451 | fX(0.), | |
452 | fY(0.), | |
453 | fZ(0.) | |
454 | { | |
455 | // | |
456 | // Translates an AliEMCALRecPoint object into the internal format. | |
457 | // Index of passed cluster in its native array must be specified. | |
458 | // | |
459 | TVector3 clpos; | |
460 | recPoint->GetGlobalPosition(clpos); | |
461 | ||
462 | fX = clpos.X(); | |
463 | fY = clpos.Y(); | |
464 | fZ = clpos.Z(); | |
465 | } | |
466 | // | |
467 | //------------------------------------------------------------------------------ | |
468 | // | |
469 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster) : | |
470 | fIndex(index), | |
471 | fX(0.), | |
472 | fY(0.), | |
473 | fZ(0.) | |
474 | { | |
475 | // | |
476 | // Translates an AliESDCaloCluster object into the internal format. | |
477 | // Index of passed cluster in its native array must be specified. | |
478 | // | |
479 | Float_t clpos[3]= {0., 0., 0.}; | |
480 | caloCluster->GetPosition(clpos); | |
481 | ||
482 | fX = (Double_t)clpos[0]; | |
483 | fY = (Double_t)clpos[1]; | |
484 | fZ = (Double_t)clpos[2]; | |
485 | } |