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fe17d4cb | 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) | |
5970dfe2 | 30 | // Revised by Rongrong 2010-05-31 (rongrong.ma@cern.ch) |
fe17d4cb | 31 | //========================================================================= |
32 | ||
33 | #include <Riostream.h> | |
34 | #include <iomanip> | |
35 | ||
36 | #include <TFile.h> | |
37 | #include <TTree.h> | |
fe17d4cb | 38 | #include <TList.h> |
39 | #include <TString.h> | |
40 | #include <TVector3.h> | |
41 | #include <TClonesArray.h> | |
c61f0e70 | 42 | #include <TGeoMatrix.h> |
fe17d4cb | 43 | |
44 | #include "AliLog.h" | |
af885e0f | 45 | #include "AliESDEvent.h" |
fe17d4cb | 46 | #include "AliESDtrack.h" |
89ffc0b0 | 47 | #include "AliESDCaloCluster.h" |
fe17d4cb | 48 | #include "AliEMCALRecPoint.h" |
49 | #include "AliRunLoader.h" | |
50 | #include "AliEMCALTrack.h" | |
51 | #include "AliEMCALLoader.h" | |
c61f0e70 | 52 | #include "AliEMCALGeometry.h" |
8ba062b1 | 53 | #include "AliEMCALReconstructor.h" |
54 | #include "AliEMCALRecParam.h" | |
55 | #include "AliCDBEntry.h" | |
56 | #include "AliCDBManager.h" | |
3e3faf55 | 57 | #include "AliEMCALReconstructor.h" |
ee602376 | 58 | #include "AliEMCALRecoUtils.h" |
c61f0e70 | 59 | |
fe17d4cb | 60 | #include "AliEMCALTracker.h" |
61 | ||
0267cfa6 | 62 | using std::cerr; |
63 | using std::endl; | |
fe17d4cb | 64 | ClassImp(AliEMCALTracker) |
8ba062b1 | 65 | |
fe17d4cb | 66 | // |
67 | //------------------------------------------------------------------------------ | |
68 | // | |
69 | AliEMCALTracker::AliEMCALTracker() | |
8fc351e3 | 70 | : AliTracker(), |
71 | fCutPt(0), | |
72 | fCutNITS(0), | |
73 | fCutNTPC(50), | |
da34fafe | 74 | fStep(20), |
8fc351e3 | 75 | fTrackCorrMode(kTrackCorrMMB), |
76 | fClusterWindow(50), | |
77 | fCutEta(0.025), | |
78 | fCutPhi(0.05), | |
79 | fTracks(0), | |
80 | fClusters(0), | |
81 | fGeom(0) | |
fe17d4cb | 82 | { |
5970dfe2 | 83 | // |
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. | |
88 | // | |
0832a2bf | 89 | InitParameters(); |
fe17d4cb | 90 | } |
91 | // | |
92 | //------------------------------------------------------------------------------ | |
93 | // | |
94 | AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy) | |
95 | : AliTracker(), | |
5970dfe2 | 96 | fCutPt(copy.fCutPt), |
dcd86c5d | 97 | fCutNITS(copy.fCutNITS), |
98 | fCutNTPC(copy.fCutNTPC), | |
5970dfe2 | 99 | fStep(copy.fStep), |
100 | fTrackCorrMode(copy.fTrackCorrMode), | |
8fc351e3 | 101 | fClusterWindow(copy.fClusterWindow), |
5970dfe2 | 102 | fCutEta(copy.fCutEta), |
103 | fCutPhi(copy.fCutPhi), | |
fe17d4cb | 104 | fTracks((TObjArray*)copy.fTracks->Clone()), |
105 | fClusters((TObjArray*)copy.fClusters->Clone()), | |
c61f0e70 | 106 | fGeom(copy.fGeom) |
fe17d4cb | 107 | { |
5970dfe2 | 108 | // |
109 | // Copy constructor | |
110 | // Besides copying all parameters, duplicates all collections. | |
111 | // | |
fe17d4cb | 112 | } |
113 | // | |
114 | //------------------------------------------------------------------------------ | |
115 | // | |
f1d9131f | 116 | AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& source) |
117 | { // assignment operator; use copy ctor | |
118 | if (&source == this) return *this; | |
5970dfe2 | 119 | |
f1d9131f | 120 | new (this) AliEMCALTracker(source); |
121 | return *this; | |
fe17d4cb | 122 | } |
123 | // | |
124 | //------------------------------------------------------------------------------ | |
125 | // | |
8ba062b1 | 126 | void AliEMCALTracker::InitParameters() |
127 | { | |
5970dfe2 | 128 | // |
129 | // Retrieve initialization parameters | |
130 | // | |
8ba062b1 | 131 | |
132 | // Check if the instance of AliEMCALRecParam exists, | |
3e3faf55 | 133 | const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam(); |
3a2a23e1 | 134 | |
ba6de5ea | 135 | if(!recParam){ |
136 | AliFatal("Reconstruction parameters for EMCAL not set!"); | |
8ba062b1 | 137 | } |
41f05b8c | 138 | else{ |
5970dfe2 | 139 | |
140 | fCutEta = recParam->GetMthCutEta(); | |
141 | fCutPhi = recParam->GetMthCutPhi(); | |
8fc351e3 | 142 | fStep = recParam->GetExtrapolateStep(); |
5970dfe2 | 143 | fCutPt = recParam->GetTrkCutPt(); |
8fc351e3 | 144 | fCutNITS = recParam->GetTrkCutNITS(); |
145 | fCutNTPC = recParam->GetTrkCutNTPC(); | |
41f05b8c | 146 | } |
3e3faf55 | 147 | |
8ba062b1 | 148 | } |
5970dfe2 | 149 | |
c61f0e70 | 150 | // |
151 | //------------------------------------------------------------------------------ | |
152 | // | |
fe17d4cb | 153 | void AliEMCALTracker::Clear(Option_t* option) |
154 | { | |
155 | // | |
156 | // Clearing method | |
044225d9 | 157 | // Deletes all objects in arrays and the arrays themselves |
fe17d4cb | 158 | // |
159 | ||
160 | TString opt(option); | |
161 | Bool_t clearTracks = opt.Contains("TRACKS"); | |
162 | Bool_t clearClusters = opt.Contains("CLUSTERS"); | |
fe17d4cb | 163 | if (opt.Contains("ALL")) { |
164 | clearTracks = kTRUE; | |
165 | clearClusters = kTRUE; | |
fe17d4cb | 166 | } |
167 | ||
5970dfe2 | 168 | //fTracks is a collection of esdTrack |
169 | //When clearing this array, the linked objects should not be deleted | |
fe17d4cb | 170 | if (fTracks != 0x0 && clearTracks) { |
5970dfe2 | 171 | fTracks->Clear(); |
044225d9 | 172 | delete fTracks; |
173 | fTracks = 0; | |
fe17d4cb | 174 | } |
175 | if (fClusters != 0x0 && clearClusters) { | |
044225d9 | 176 | fClusters->Delete(); |
177 | delete fClusters; | |
178 | fClusters = 0; | |
fe17d4cb | 179 | } |
fe17d4cb | 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 | ||
bce21ea7 | 194 | cTree->SetBranchStatus("*",0); //disable all branches |
195 | cTree->SetBranchStatus("EMCALECARP",1); //Enable only the branch we need | |
196 | ||
fe17d4cb | 197 | TBranch *branch = cTree->GetBranch("EMCALECARP"); |
198 | if (!branch) { | |
c61f0e70 | 199 | AliError("Can't get the branch with the EMCAL clusters"); |
fe17d4cb | 200 | return 1; |
201 | } | |
202 | ||
9596d957 | 203 | TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000); |
fe17d4cb | 204 | branch->SetAddress(&clusters); |
fe17d4cb | 205 | |
bce21ea7 | 206 | //cTree->GetEvent(0); |
207 | branch->GetEntry(0); | |
9596d957 | 208 | Int_t nClusters = (Int_t)clusters->GetEntries(); |
bce21ea7 | 209 | if(fClusters) fClusters->Delete(); |
210 | else fClusters = new TObjArray(0); | |
fe17d4cb | 211 | for (Int_t i = 0; i < nClusters; i++) { |
212 | AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i); | |
213 | if (!cluster) continue; | |
fe17d4cb | 214 | AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster); |
215 | fClusters->AddLast(matchCluster); | |
216 | } | |
3d9e8b15 | 217 | |
2ad4424e | 218 | branch->SetAddress(0); |
219 | clusters->Delete(); | |
220 | delete clusters; | |
221 | ||
5970dfe2 | 222 | AliInfo(Form("Collected %d RecPoints from Tree", fClusters->GetEntries())); |
fe17d4cb | 223 | |
224 | return 0; | |
225 | } | |
226 | // | |
227 | //------------------------------------------------------------------------------ | |
228 | // | |
af885e0f | 229 | Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd) |
fe17d4cb | 230 | { |
5970dfe2 | 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 | { | |
243 | AliESDCaloCluster *cluster = esd->GetCaloCluster(i); | |
244 | if (!cluster || !cluster->IsEMCAL()) continue ; | |
245 | AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster); | |
246 | fClusters->AddLast(matchCluster); | |
247 | } | |
248 | ||
249 | AliInfo(Form("Collected %d clusters from ESD", fClusters->GetEntries())); | |
250 | return 0; | |
fe17d4cb | 251 | } |
252 | // | |
253 | //------------------------------------------------------------------------------ | |
254 | // | |
af885e0f | 255 | Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd) |
fe17d4cb | 256 | { |
5970dfe2 | 257 | // |
258 | // Load ESD tracks. | |
259 | // | |
fe17d4cb | 260 | |
5970dfe2 | 261 | Clear("TRACKS"); |
262 | fTracks = new TObjArray(0); | |
fe17d4cb | 263 | |
5970dfe2 | 264 | Int_t nTracks = esd->GetNumberOfTracks(); |
8fc351e3 | 265 | //Bool_t isKink=kFALSE; |
5970dfe2 | 266 | for (Int_t i = 0; i < nTracks; i++) |
267 | { | |
268 | AliESDtrack *esdTrack = esd->GetTrack(i); | |
269 | // set by default the value corresponding to "no match" | |
270 | esdTrack->SetEMCALcluster(kUnmatched); | |
8fc351e3 | 271 | esdTrack->ResetStatus(AliESDtrack::kEMCALmatch); |
5970dfe2 | 272 | |
273 | //Select good quaulity tracks | |
274 | if(esdTrack->Pt()<fCutPt) continue; | |
275 | if(esdTrack->GetNcls(1)<fCutNTPC)continue; | |
276 | ||
5970dfe2 | 277 | //Loose geometric cut |
278 | Double_t phi = esdTrack->Phi()*TMath::RadToDeg(); | |
d874f457 | 279 | if(TMath::Abs(esdTrack->Eta())>0.8 || phi <= 20 || phi >= 240 ) continue; |
5970dfe2 | 280 | |
281 | fTracks->AddLast(esdTrack); | |
282 | } | |
283 | ||
284 | AliInfo(Form("Collected %d tracks", fTracks->GetEntries())); | |
285 | return 0; | |
286 | } | |
287 | // | |
288 | //------------------------------------------------------------------------------ | |
289 | // | |
290 | void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option) | |
291 | { | |
292 | // | |
293 | // Set track correction mode | |
294 | // gest the choice in string format and converts into | |
295 | // internal enum | |
296 | // | |
297 | ||
298 | TString opt(option); | |
299 | opt.ToUpper(); | |
300 | ||
301 | if (!opt.CompareTo("NONE")) | |
302 | { | |
303 | fTrackCorrMode = kTrackCorrNone; | |
304 | } | |
305 | else if (!opt.CompareTo("MMB")) | |
306 | { | |
307 | fTrackCorrMode = kTrackCorrMMB; | |
308 | } | |
309 | else | |
310 | { | |
311 | cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl; | |
312 | } | |
fe17d4cb | 313 | } |
314 | // | |
315 | //------------------------------------------------------------------------------ | |
316 | // | |
af885e0f | 317 | Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd) |
fe17d4cb | 318 | { |
319 | // | |
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. | |
324 | // | |
3d9e8b15 | 325 | // |
326 | // Note: should always return 0=OK, because otherwise all tracking | |
327 | // is aborted for this event | |
5970dfe2 | 328 | |
fe17d4cb | 329 | if (!esd) { |
330 | AliError("NULL ESD passed"); | |
331 | return 1; | |
332 | } | |
333 | ||
5970dfe2 | 334 | // step 1: collect clusters |
c61f0e70 | 335 | Int_t okLoadClusters, nClusters; |
fe17d4cb | 336 | if (!fClusters || (fClusters && fClusters->IsEmpty())) { |
fe17d4cb | 337 | okLoadClusters = LoadClusters(esd); |
fe17d4cb | 338 | } |
c61f0e70 | 339 | nClusters = fClusters->GetEntries(); |
5970dfe2 | 340 | |
341 | // step 2: collect ESD tracks | |
342 | Int_t nTracks, okLoadTracks; | |
343 | okLoadTracks = LoadTracks(esd); | |
c61f0e70 | 344 | nTracks = fTracks->GetEntries(); |
fe17d4cb | 345 | |
5970dfe2 | 346 | // step 3: for each track, find the closest cluster as matched within residual cuts |
347 | Int_t index=-1; | |
348 | for (Int_t it = 0; it < nTracks; it++) | |
349 | { | |
350 | AliESDtrack *track = (AliESDtrack*)fTracks->At(it); | |
351 | index = FindMatchedCluster(track); | |
352 | if (index>-1) | |
353 | { | |
354 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(index); | |
355 | track->SetEMCALcluster(cluster->Index()); | |
952d023a | 356 | track->SetStatus(AliESDtrack::kEMCALmatch); |
5970dfe2 | 357 | } |
358 | } | |
fe17d4cb | 359 | |
360 | return 0; | |
361 | } | |
fe17d4cb | 362 | |
363 | // | |
364 | //------------------------------------------------------------------------------ | |
365 | // | |
5970dfe2 | 366 | Int_t AliEMCALTracker::FindMatchedCluster(AliESDtrack *track) |
367 | { | |
368 | // | |
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 | |
371 | // | |
17773e2e | 372 | |
ee602376 | 373 | Float_t maxEta=fCutEta; |
374 | Float_t maxPhi=fCutPhi; | |
5970dfe2 | 375 | Int_t index = -1; |
376 | ||
377 | // If the esdFriend is available, use the TPCOuter point as the starting point of extrapolation | |
378 | // Otherwise use the TPCInner point | |
8108ab9e | 379 | AliExternalTrackParam *trkParam = 0; |
5970dfe2 | 380 | const AliESDfriendTrack* friendTrack = track->GetFriendTrack(); |
381 | if(friendTrack && friendTrack->GetTPCOut()) | |
382 | trkParam = const_cast<AliExternalTrackParam*>(friendTrack->GetTPCOut()); | |
383 | else | |
384 | trkParam = const_cast<AliExternalTrackParam*>(track->GetInnerParam()); | |
385 | if(!trkParam) return index; | |
386 | ||
8fc351e3 | 387 | |
388 | AliExternalTrackParam trkParamTmp(*trkParam); | |
ee602376 | 389 | Float_t eta, phi; |
da25bc37 | 390 | if(!AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(&trkParamTmp, 430., track->GetMass(kTRUE), fStep, eta, phi)) return index; |
ed15417e | 391 | track->SetTrackPhiEtaOnEMCal(phi,eta); |
8fc351e3 | 392 | if(TMath::Abs(eta)>0.75 || (phi) < 70*TMath::DegToRad() || (phi) > 190*TMath::DegToRad()) return index; |
393 | ||
5970dfe2 | 394 | //Perform extrapolation |
395 | Double_t trkPos[3]; | |
8fc351e3 | 396 | trkParamTmp.GetXYZ(trkPos); |
5970dfe2 | 397 | Int_t nclusters = fClusters->GetEntries(); |
398 | for(Int_t ic=0; ic<nclusters; ic++) | |
399 | { | |
5970dfe2 | 400 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic); |
8fc351e3 | 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; | |
404 | ||
405 | AliExternalTrackParam trkParTmp(trkParamTmp); | |
406 | ||
ee602376 | 407 | Float_t tmpEta, tmpPhi; |
da25bc37 | 408 | if(!AliEMCALRecoUtils::ExtrapolateTrackToPosition(&trkParTmp, clsPos,track->GetMass(kTRUE), 5, tmpEta, tmpPhi)) continue; |
5970dfe2 | 409 | if(TMath::Abs(tmpPhi)<TMath::Abs(maxPhi) && TMath::Abs(tmpEta)<TMath::Abs(maxEta)) |
410 | { | |
411 | maxPhi=tmpPhi; | |
412 | maxEta=tmpEta; | |
413 | index=ic; | |
414 | } | |
5970dfe2 | 415 | } |
416 | return index; | |
fe17d4cb | 417 | } |
5970dfe2 | 418 | |
fe17d4cb | 419 | // |
420 | //------------------------------------------------------------------------------ | |
421 | // | |
422 | void AliEMCALTracker::UnloadClusters() | |
423 | { | |
424 | // | |
044225d9 | 425 | // Free memory from all arrays |
426 | // This method is called after the local tracking step | |
427 | // so we can safely delete everything | |
fe17d4cb | 428 | // |
429 | ||
044225d9 | 430 | Clear(); |
fe17d4cb | 431 | } |
04475328 | 432 | |
fe17d4cb | 433 | // |
434 | //------------------------------------------------------------------------------ | |
435 | // | |
436 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint) | |
437 | : fIndex(index), | |
fe17d4cb | 438 | fX(0.), |
439 | fY(0.), | |
440 | fZ(0.) | |
441 | { | |
442 | // | |
443 | // Translates an AliEMCALRecPoint object into the internal format. | |
444 | // Index of passed cluster in its native array must be specified. | |
445 | // | |
446 | TVector3 clpos; | |
447 | recPoint->GetGlobalPosition(clpos); | |
448 | ||
449 | fX = clpos.X(); | |
450 | fY = clpos.Y(); | |
451 | fZ = clpos.Z(); | |
452 | } | |
453 | // | |
454 | //------------------------------------------------------------------------------ | |
455 | // | |
456 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster) | |
457 | : fIndex(index), | |
fe17d4cb | 458 | fX(0.), |
459 | fY(0.), | |
460 | fZ(0.) | |
461 | { | |
462 | // | |
463 | // Translates an AliESDCaloCluster object into the internal format. | |
464 | // Index of passed cluster in its native array must be specified. | |
465 | // | |
53e430a3 | 466 | Float_t clpos[3]= {0., 0., 0.}; |
7592dfc4 | 467 | caloCluster->GetPosition(clpos); |
fe17d4cb | 468 | |
469 | fX = (Double_t)clpos[0]; | |
470 | fY = (Double_t)clpos[1]; | |
471 | fZ = (Double_t)clpos[2]; | |
472 | } |