]>
Commit | Line | Data |
---|---|---|
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 | //========================================================================= | |
31 | ||
32 | #include <Riostream.h> | |
33 | #include <iomanip> | |
34 | ||
35 | #include <TFile.h> | |
36 | #include <TTree.h> | |
37 | #include <TList.h> | |
38 | #include <TString.h> | |
39 | #include <TVector3.h> | |
40 | #include <TClonesArray.h> | |
41 | #include <TGeoMatrix.h> | |
42 | ||
43 | #include "AliLog.h" | |
44 | #include "AliESDEvent.h" | |
45 | #include "AliESDtrack.h" | |
46 | #include "AliESDCaloCluster.h" | |
47 | #include "AliEMCALRecPoint.h" | |
48 | #include "AliRunLoader.h" | |
49 | #include "AliEMCALTrack.h" | |
50 | #include "AliEMCALLoader.h" | |
51 | #include "AliEMCALGeometry.h" | |
52 | ||
53 | #include "AliEMCALTracker.h" | |
54 | ||
55 | ClassImp(AliEMCALTracker) | |
56 | // | |
57 | //------------------------------------------------------------------------------ | |
58 | // | |
59 | AliEMCALTracker::AliEMCALTracker() | |
60 | : AliTracker(), | |
61 | fNPropSteps(0), | |
62 | fTrackCorrMode(kTrackCorrNone), | |
63 | fCutX(50.0), | |
64 | fCutY(50.0), | |
65 | fCutZ(50.0), | |
66 | fCutAlphaMin(-200.0), | |
67 | fCutAlphaMax(200.0), | |
68 | fCutAngle(100.0), | |
69 | fMaxDist(100.0), | |
70 | fRho(1.0), | |
71 | fX0(1.0), | |
72 | fTracks(0), | |
73 | fClusters(0), | |
74 | fMatches(0), | |
75 | fGeom(0) | |
76 | { | |
77 | // | |
78 | // Default constructor. | |
79 | // Initializes al simple data members to default values, | |
80 | // and all collections to NULL. | |
81 | // Output file name is set to a default value. | |
82 | // | |
83 | } | |
84 | // | |
85 | //------------------------------------------------------------------------------ | |
86 | // | |
87 | AliEMCALTracker::AliEMCALTracker(const AliEMCALTracker& copy) | |
88 | : AliTracker(), | |
89 | fNPropSteps(copy.fNPropSteps), | |
90 | fTrackCorrMode(copy.fTrackCorrMode), | |
91 | fCutX(copy.fCutX), | |
92 | fCutY(copy.fCutY), | |
93 | fCutZ(copy.fCutZ), | |
94 | fCutAlphaMin(copy.fCutAlphaMin), | |
95 | fCutAlphaMax(copy.fCutAlphaMax), | |
96 | fCutAngle(copy.fCutAngle), | |
97 | fMaxDist(copy.fMaxDist), | |
98 | fRho(copy.fRho), | |
99 | fX0(copy.fX0), | |
100 | fTracks((TObjArray*)copy.fTracks->Clone()), | |
101 | fClusters((TObjArray*)copy.fClusters->Clone()), | |
102 | fMatches((TList*)copy.fMatches->Clone()), | |
103 | fGeom(copy.fGeom) | |
104 | { | |
105 | // | |
106 | // Copy constructor | |
107 | // Besides copying all parameters, duplicates all collections. | |
108 | // | |
109 | } | |
110 | // | |
111 | //------------------------------------------------------------------------------ | |
112 | // | |
113 | AliEMCALTracker& AliEMCALTracker::operator=(const AliEMCALTracker& copy) | |
114 | { | |
115 | // | |
116 | // Assignment operator. | |
117 | // Besides copying all parameters, duplicates all collections. | |
118 | // | |
119 | ||
120 | fCutX = copy.fCutX; | |
121 | fCutY = copy.fCutY; | |
122 | fCutZ = copy.fCutZ; | |
123 | fCutAlphaMin = copy.fCutAlphaMin; | |
124 | fCutAlphaMax = copy.fCutAlphaMax; | |
125 | fCutAngle = copy.fCutAngle; | |
126 | fMaxDist = copy.fMaxDist; | |
127 | ||
128 | fTracks = (TObjArray*)copy.fTracks->Clone(); | |
129 | fClusters = (TObjArray*)copy.fClusters->Clone(); | |
130 | fMatches = (TList*)copy.fMatches->Clone(); | |
131 | ||
132 | fGeom = copy.fGeom; | |
133 | ||
134 | return (*this); | |
135 | } | |
136 | // | |
137 | //------------------------------------------------------------------------------ | |
138 | // | |
139 | TTree* AliEMCALTracker::SearchTrueMatches() | |
140 | { | |
141 | if (!fClusters) return 0; | |
142 | if (fClusters->IsEmpty()) return 0; | |
143 | if (!fTracks) return 0; | |
144 | if (fTracks->IsEmpty()) return 0; | |
145 | ||
146 | TTree *outTree = new TTree("tree", "True matches from event"); | |
147 | Int_t indexT, indexC, label; | |
148 | outTree->Branch("indexC", &indexC, "indexC/I"); | |
149 | outTree->Branch("indexT", &indexT, "indexT/I"); | |
150 | outTree->Branch("label", &label , "label/I"); | |
151 | ||
152 | Double_t dist; | |
153 | Int_t ic, nClusters = (Int_t)fClusters->GetEntries(); | |
154 | Int_t it, nTracks = fTracks->GetEntries(); | |
155 | ||
156 | for (ic = 0; ic < nClusters; ic++) { | |
157 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic); | |
158 | label = cluster->Label(); | |
159 | indexC = cluster->Index(); | |
160 | for (it = 0; it < nTracks; it++) { | |
161 | AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it); | |
162 | if (TMath::Abs(track->GetSeedLabel()) != label) continue; | |
163 | dist = CheckPair(track, cluster); | |
164 | if (dist <= fMaxDist) { | |
165 | indexT = track->GetSeedIndex(); | |
166 | outTree->Fill(); | |
167 | } | |
168 | } | |
169 | } | |
170 | ||
171 | return outTree; | |
172 | } | |
173 | // | |
174 | //------------------------------------------------------------------------------ | |
175 | // | |
176 | void AliEMCALTracker::Clear(Option_t* option) | |
177 | { | |
178 | // | |
179 | // Clearing method | |
180 | // Clears all specified arrays and the containers themselves. | |
181 | // | |
182 | ||
183 | TString opt(option); | |
184 | Bool_t doDelete = opt.Contains("DELETE"); | |
185 | Bool_t clearTracks = opt.Contains("TRACKS"); | |
186 | Bool_t clearClusters = opt.Contains("CLUSTERS"); | |
187 | Bool_t clearMatches = opt.Contains("MATCHES"); | |
188 | if (opt.Contains("ALL")) { | |
189 | clearTracks = kTRUE; | |
190 | clearClusters = kTRUE; | |
191 | clearMatches = kTRUE; | |
192 | } | |
193 | ||
194 | if (fTracks != 0x0 && clearTracks) { | |
195 | if (!doDelete) { | |
196 | fTracks->Clear(); | |
197 | } | |
198 | else { | |
199 | if (!fTracks->IsEmpty()) fTracks->Delete(); | |
200 | delete fTracks; | |
201 | fTracks = 0; | |
202 | } | |
203 | } | |
204 | if (fClusters != 0x0 && clearClusters) { | |
205 | if (!doDelete) { | |
206 | fClusters->Clear(); | |
207 | } | |
208 | else { | |
209 | if (!fClusters->IsEmpty()) fClusters->Delete(); | |
210 | delete fClusters; | |
211 | fClusters = 0; | |
212 | } | |
213 | } | |
214 | if (fMatches != 0x0 && clearMatches) { | |
215 | if (!doDelete) { | |
216 | fMatches->Clear(); | |
217 | } | |
218 | else { | |
219 | if (!fMatches->IsEmpty()) fMatches->Delete(); | |
220 | delete fMatches; | |
221 | fMatches = 0; | |
222 | } | |
223 | } | |
224 | } | |
225 | // | |
226 | //------------------------------------------------------------------------------ | |
227 | // | |
228 | Int_t AliEMCALTracker::LoadClusters(TTree *cTree) | |
229 | { | |
230 | // | |
231 | // Load EMCAL clusters in the form of AliEMCALRecPoint, | |
232 | // from simulation temporary files. | |
233 | // (When included in reconstruction chain, this method is used automatically) | |
234 | // | |
235 | ||
236 | Clear("CLUSTERS"); | |
237 | ||
238 | TBranch *branch = cTree->GetBranch("EMCALECARP"); | |
239 | if (!branch) { | |
240 | AliError("Can't get the branch with the EMCAL clusters"); | |
241 | return 1; | |
242 | } | |
243 | ||
244 | TClonesArray *clusters = new TClonesArray("AliEMCALRecPoint", 1000); | |
245 | branch->SetAddress(&clusters); | |
246 | ||
247 | cTree->GetEvent(0); | |
248 | Int_t nClusters = (Int_t)clusters->GetEntries(); | |
249 | fClusters = new TObjArray(0); | |
250 | for (Int_t i = 0; i < nClusters; i++) { | |
251 | AliEMCALRecPoint *cluster = (AliEMCALRecPoint*)clusters->At(i); | |
252 | if (!cluster) continue; | |
253 | if (cluster->GetClusterType() != AliESDCaloCluster::kClusterv1) continue; | |
254 | AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster); | |
255 | fClusters->AddLast(matchCluster); | |
256 | } | |
257 | ||
258 | branch->SetAddress(0); | |
259 | clusters->Delete(); | |
260 | delete clusters; | |
261 | if (fClusters->IsEmpty()) | |
262 | AliWarning("No clusters collected"); | |
263 | ||
264 | AliInfo(Form("Collected %d clusters", fClusters->GetEntries())); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | // | |
269 | //------------------------------------------------------------------------------ | |
270 | // | |
271 | Int_t AliEMCALTracker::LoadClusters(AliESDEvent *esd) | |
272 | { | |
273 | // | |
274 | // Load EMCAL clusters in the form of AliESDCaloClusters, | |
275 | // from an AliESD object. | |
276 | // | |
277 | ||
278 | // make sure that tracks/clusters collections are empty | |
279 | Clear("CLUSTERS"); | |
280 | ||
281 | Int_t start = esd->GetFirstEMCALCluster(); | |
282 | Int_t nClustersEMC = esd->GetNumberOfEMCALClusters(); | |
283 | Int_t end = start + nClustersEMC; | |
284 | ||
285 | fClusters = new TObjArray(0); | |
286 | ||
287 | Int_t i; | |
288 | for (i = start; i < end; i++) { | |
289 | AliESDCaloCluster *cluster = esd->GetCaloCluster(i); | |
290 | if (!cluster) continue; | |
291 | if (cluster->GetClusterType() != AliESDCaloCluster::kClusterv1) continue; | |
292 | AliEMCALMatchCluster *matchCluster = new AliEMCALMatchCluster(i, cluster); | |
293 | fClusters->AddLast(matchCluster); | |
294 | } | |
295 | if (fClusters->IsEmpty()) | |
296 | AliWarning("No clusters collected"); | |
297 | ||
298 | AliInfo(Form("Collected %d clusters", fClusters->GetEntries())); | |
299 | ||
300 | return 0; | |
301 | } | |
302 | // | |
303 | //------------------------------------------------------------------------------ | |
304 | // | |
305 | Int_t AliEMCALTracker::LoadTracks(AliESDEvent *esd) | |
306 | { | |
307 | // | |
308 | // Load ESD tracks. | |
309 | // | |
310 | ||
311 | Clear("TRACKS"); | |
312 | ||
313 | Int_t nTracks = esd->GetNumberOfTracks(); | |
314 | fTracks = new TObjArray(0); | |
315 | ||
316 | Int_t i, j; | |
317 | Bool_t isKink; | |
318 | Double_t alpha; | |
319 | for (i = 0; i < nTracks; i++) { | |
320 | AliESDtrack *esdTrack = esd->GetTrack(i); | |
321 | // set by default the value corresponding to "no match" | |
322 | esdTrack->SetEMCALcluster(kUnmatched); | |
323 | // if (esdTrack->GetLabel() < 0) continue; | |
324 | // if (!(esdTrack->GetStatus() & AliESDtrack::kTOFout)) continue; | |
325 | isKink = kFALSE; | |
326 | for (j = 0; j < 3; j++) { | |
327 | if (esdTrack->GetKinkIndex(j) != 0) isKink = kTRUE; | |
328 | } | |
329 | if (isKink) continue; | |
330 | AliEMCALTrack *track = new AliEMCALTrack(*esdTrack); | |
331 | track->SetMass(0.13957018); | |
332 | // check alpha and reject the tracks which fall outside EMCAL acceptance | |
333 | alpha = track->GetAlpha() * TMath::RadToDeg(); | |
334 | if (alpha > -155.0 && alpha < 67.0) { | |
335 | delete track; | |
336 | continue; | |
337 | } | |
338 | // if (!PropagateToEMCAL(track)) { | |
339 | // delete track; | |
340 | // continue; | |
341 | // } | |
342 | track->SetSeedIndex(i); | |
343 | track->SetSeedLabel(esdTrack->GetLabel()); | |
344 | fTracks->AddLast(track); | |
345 | } | |
346 | if (fTracks->IsEmpty()) { | |
347 | AliWarning("No tracks collected"); | |
348 | } | |
349 | ||
350 | AliInfo(Form("Collected %d tracks", fTracks->GetEntries())); | |
351 | ||
352 | return 0; | |
353 | } | |
354 | // | |
355 | //------------------------------------------------------------------------------ | |
356 | // | |
357 | Int_t AliEMCALTracker::PropagateBack(AliESDEvent* esd) | |
358 | { | |
359 | // | |
360 | // Main operation method. | |
361 | // Gets external AliESD containing tracks to be matched. | |
362 | // After executing match finding, stores in the same ESD object all infos | |
363 | // and releases the object for further reconstruction steps. | |
364 | // | |
365 | // | |
366 | // Note: should always return 0=OK, because otherwise all tracking | |
367 | // is aborted for this event | |
368 | ||
369 | if (!esd) { | |
370 | AliError("NULL ESD passed"); | |
371 | return 1; | |
372 | } | |
373 | ||
374 | // step 1: | |
375 | // if cluster array is empty, cluster are collected | |
376 | // from the passed ESD, and work is done with ESDCaloClusters | |
377 | Int_t okLoadClusters, nClusters; | |
378 | if (!fClusters || (fClusters && fClusters->IsEmpty())) { | |
379 | okLoadClusters = LoadClusters(esd); | |
380 | if (okLoadClusters) return 2; | |
381 | } | |
382 | nClusters = fClusters->GetEntries(); | |
383 | ||
384 | // step 2: | |
385 | // collect ESD tracks | |
386 | Int_t okLoadTracks = LoadTracks(esd), nTracks; | |
387 | if (okLoadTracks) return 3; | |
388 | nTracks = fTracks->GetEntries(); | |
389 | ||
390 | // step 3: | |
391 | // each track is propagated to the "R" position of each cluster. | |
392 | // The closest cluster is assigned as match. | |
393 | // IF no clusters lie within the maximum allowed distance, no matches are assigned. | |
394 | Int_t nMatches = CreateMatches(); | |
395 | if (!nMatches) { | |
396 | AliInfo(Form("#clusters = %d -- #tracks = %d --> No good matches found.", nClusters, nTracks)); | |
397 | return 0; | |
398 | } | |
399 | else { | |
400 | AliInfo(Form("#clusters = %d -- #tracks = %d --> Found %d matches.", nClusters, nTracks, nMatches)); | |
401 | } | |
402 | ||
403 | // step 4: | |
404 | // when more than 1 track share the same matched cluster, only the closest one is kept. | |
405 | Int_t nRemoved = SolveCompetitions(); | |
406 | AliInfo(Form("Removed %d duplicate matches", nRemoved)); | |
407 | if (nRemoved >= nMatches) { | |
408 | AliError("Removed ALL matches! Check the algorithm or data. Nothing to save"); | |
409 | return 5; | |
410 | } | |
411 | ||
412 | // step 5: | |
413 | // save obtained information setting the 'fEMCALindex' field of AliESDtrack object | |
414 | Int_t nSaved = 0, trackID, nGood = 0, nFake = 0; | |
415 | TListIter iter(fMatches); | |
416 | AliEMCALMatch *match = 0; | |
417 | while ( (match = (AliEMCALMatch*)iter.Next()) ) { | |
418 | if (!match->CanBeSaved()) continue; | |
419 | AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(match->GetIndexT()); | |
420 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(match->GetIndexC()); | |
421 | trackID = track->GetSeedIndex(); | |
422 | AliESDtrack *esdTrack = esd->GetTrack(trackID); | |
423 | if (!esdTrack) continue; | |
424 | if (TMath::Abs(esdTrack->GetLabel()) == cluster->Label()) { | |
425 | esdTrack->SetEMCALcluster(cluster->Index()); | |
426 | nGood++; | |
427 | } | |
428 | else { | |
429 | esdTrack->SetEMCALcluster(-cluster->Index()); | |
430 | nFake++; | |
431 | } | |
432 | nSaved++; | |
433 | } | |
434 | /* | |
435 | AliEMCALTrack *track = 0; | |
436 | TObjArrayIter tracks(fTracks); | |
437 | while ( (track = (AliEMCALTrack*)tracks.Next()) ) { | |
438 | trackID = track->GetSeedIndex(); | |
439 | clusterID = track->GetMatchedClusterIndex(); | |
440 | AliESDtrack *esdTrack = esd->GetTrack(trackID); | |
441 | if (!esdTrack) continue; | |
442 | if (clusterID < 0) { | |
443 | esdTrack->SetEMCALcluster(kUnmatched); | |
444 | } | |
445 | else { | |
446 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(clusterID); | |
447 | if (!cluster) continue; | |
448 | if (esdTrack->GetLabel() == cluster->Label()) { | |
449 | nGood++; | |
450 | esdTrack->SetEMCALcluster(cluster->Index()); | |
451 | } | |
452 | else { | |
453 | esdTrack->SetEMCALcluster(-cluster->Index()); | |
454 | } | |
455 | nSaved++; | |
456 | } | |
457 | } | |
458 | */ | |
459 | AliInfo(Form("Saved %d matches [%d good + %d fake]", nSaved, nGood, nFake)); | |
460 | ||
461 | return 0; | |
462 | } | |
463 | // | |
464 | //------------------------------------------------------------------------------ | |
465 | // | |
466 | void AliEMCALTracker::SetTrackCorrectionMode(Option_t *option) | |
467 | { | |
468 | // | |
469 | // Set track correction mode | |
470 | // gest the choice in string format and converts into | |
471 | // internal enum | |
472 | // | |
473 | ||
474 | TString opt(option); | |
475 | opt.ToUpper(); | |
476 | ||
477 | if (!opt.CompareTo("NONE")) { | |
478 | fTrackCorrMode = kTrackCorrNone; | |
479 | } | |
480 | else if (!opt.CompareTo("MMB")) { | |
481 | fTrackCorrMode = kTrackCorrMMB; | |
482 | } | |
483 | else if (!opt.CompareTo("FIXED")) { | |
484 | fTrackCorrMode = kTrackCorrFixed; | |
485 | } | |
486 | else { | |
487 | cerr << "E-AliEMCALTracker::SetTrackCorrectionMode '" << option << "': Unrecognized option" << endl; | |
488 | } | |
489 | } | |
490 | ||
491 | // | |
492 | //------------------------------------------------------------------------------ | |
493 | // | |
494 | Double_t AliEMCALTracker::AngleDiff(Double_t angle1, Double_t angle2) | |
495 | { | |
496 | // | |
497 | // [PRIVATE] | |
498 | // Given two angles in radiants, it converts them in the range 0-2pi | |
499 | // then computes their true difference, i.e. if the difference a1-a2 | |
500 | // results to be larger than 180 degrees, it returns 360 - diff. | |
501 | // | |
502 | ||
503 | if (angle1 < 0.0) angle1 += TMath::TwoPi(); | |
504 | if (angle1 > TMath::TwoPi()) angle1 -= TMath::TwoPi(); | |
505 | if (angle2 < 0.0) angle2 += TMath::TwoPi(); | |
506 | if (angle2 > TMath::TwoPi()) angle2 -= TMath::TwoPi(); | |
507 | ||
508 | Double_t diff = TMath::Abs(angle1 - angle2); | |
509 | if (diff > TMath::Pi()) diff = TMath::TwoPi() - diff; | |
510 | ||
511 | if (angle2 > angle1) diff = -diff; | |
512 | ||
513 | return diff; | |
514 | } | |
515 | // | |
516 | //------------------------------------------------------------------------------ | |
517 | // | |
518 | Double_t AliEMCALTracker::CheckPair | |
519 | (AliEMCALTrack *track, AliEMCALMatchCluster *cl) | |
520 | { | |
521 | // | |
522 | // Given a track and a cluster, | |
523 | // propagates the first to the radius of the second. | |
524 | // Then, checks the propagation point against all cuts. | |
525 | // If at least a cut is not passed, a valuer equal to | |
526 | // twice the maximum allowed distance is passed (so the value returned | |
527 | // will not be taken into account when creating matches) | |
528 | // | |
529 | ||
530 | // TEMP | |
531 | Bool_t isTrue = kFALSE; | |
532 | // if (tr->GetSeedLabel() == cl->Label()) { | |
533 | // isTrue = kTRUE; | |
534 | // } | |
535 | ||
536 | // copy track into temporary variable | |
537 | AliEMCALTrack *tr = new AliEMCALTrack(*track); | |
538 | ||
539 | Double_t distance = 2.0 * fMaxDist; | |
540 | ||
541 | // check against cut on difference 'alpha - phi' | |
542 | Double_t phi = TMath::ATan2(cl->Y(), cl->X()); | |
543 | phi = AngleDiff(phi, tr->GetAlpha()); | |
544 | if (phi < fCutAlphaMin || phi > fCutAlphaMax) return distance; | |
545 | ||
546 | // try to propagate to cluster radius | |
547 | // (return the 'distance' value if it fails) | |
548 | Double_t pos[3], &x = pos[0], &y = pos[1], &z = pos[2]; | |
549 | Double_t x0, rho; | |
550 | tr->GetXYZ(pos); | |
551 | Double_t rt = TMath::Sqrt(x*x + y*y); | |
552 | Double_t rc = TMath::Sqrt(cl->X()*cl->X() + cl->Y()*cl->Y()); | |
553 | ||
554 | if (fTrackCorrMode == kTrackCorrMMB) { | |
555 | Double_t pos1[3], pos2[3], param[6]; | |
556 | pos1[0] = x; | |
557 | pos1[1] = y; | |
558 | pos1[2] = z; | |
559 | pos2[0] = cl->X(); | |
560 | pos2[1] = cl->Y(); | |
561 | pos2[2] = cl->Z(); | |
562 | MeanMaterialBudget(pos1, pos2, param); | |
563 | rho = param[0]*param[4]; | |
564 | x0 = param[1]; | |
565 | } | |
566 | else if (fTrackCorrMode == kTrackCorrFixed) { | |
567 | rho = fRho; | |
568 | x0 = fX0; | |
569 | } | |
570 | else { | |
571 | rho = 0.0; | |
572 | x0 = 0.0; | |
573 | } | |
574 | if (fNPropSteps) { | |
575 | Int_t i; | |
576 | Double_t r; | |
577 | cout.setf(ios::fixed); | |
578 | cout.precision(5); | |
579 | if (isTrue) cout << "Init : " << rt << ' ' << x << ' ' << y << ' ' << z << endl; | |
580 | for (i = 0; i < fNPropSteps; i++) { | |
581 | r = rt + (rc - rt) * ((Double_t)(i+1)/(Double_t)fNPropSteps); | |
582 | if (!tr->PropagateTo(r, x0, rho)) return distance; | |
583 | tr->GetXYZ(pos); | |
584 | if (isTrue) cout << "Step : " << r << ' ' << x << ' ' << y << ' ' << z << endl; | |
585 | } | |
586 | if (isTrue) cout << "Clstr: " << rc << ' ' << cl->X() << ' ' << cl->Y() << ' ' << cl->Z() << endl; | |
587 | } | |
588 | else { | |
589 | // when no steps are used, no correction makes sense | |
590 | //if (!tr->PropagateTo(rc, 0.0, 0.0)) return distance; | |
591 | if (!tr->PropagateToGlobal(cl->X(), cl->Y(), cl->Z(), 0.0, 0.0)) return distance; | |
592 | /* | |
593 | Bool_t propOK = kFALSE; | |
594 | cout << "START" << endl; | |
595 | Double_t dist, rCHK, bestDist = 10000000.0; | |
596 | for (Double_t rTMP = rc; rTMP> rc*0.95; rTMP -= 0.1) { | |
597 | if (!tr->PropagateTo(rTMP)) continue; | |
598 | propOK = kTRUE; | |
599 | tr->GetXYZ(pos); | |
600 | rCHK = TMath::Sqrt(x*x + y*y); | |
601 | dist = TMath::Abs(rCHK - rc); | |
602 | cout << rCHK << " vs. " << rc << endl; | |
603 | ||
604 | if (TMath::Abs(rCHK - rc) < 0.01) break; | |
605 | } | |
606 | cout << "STOP" << endl; | |
607 | if (!propOK) return distance; | |
608 | */ | |
609 | } | |
610 | ||
611 | // get global propagation of track at end of propagation | |
612 | tr->GetXYZ(pos); | |
613 | ||
614 | // check angle cut | |
615 | TVector3 vc(cl->X(), cl->Y(), cl->Z()); | |
616 | TVector3 vt(x, y, z); | |
617 | Double_t angle = TMath::Abs(vc.Angle(vt)) * TMath::RadToDeg(); | |
618 | // check: where is the track? | |
619 | Double_t r, phiT, phiC; | |
620 | r = TMath::Sqrt(pos[0]*pos[0] + pos[1]*pos[1]); | |
621 | phiT = TMath::ATan2(pos[1], pos[0]) * TMath::RadToDeg(); | |
622 | phiC = vc.Phi() * TMath::RadToDeg(); | |
623 | //cout << "Propagated R, phiT, phiC = " << r << ' ' << phiT << ' ' << phiC << endl; | |
624 | ||
625 | if (angle > fCutAngle) { | |
626 | //cout << "angle" << endl; | |
627 | return distance; | |
628 | } | |
629 | ||
630 | // compute differences wr to each coordinate | |
631 | x -= cl->X(); | |
632 | if (TMath::Abs(x) > fCutX) { | |
633 | //cout << "cut X" << endl; | |
634 | return distance; | |
635 | } | |
636 | y -= cl->Y(); | |
637 | if (TMath::Abs(y) > fCutY) { | |
638 | //cout << "cut Y" << endl; | |
639 | return distance; | |
640 | } | |
641 | z -= cl->Z(); | |
642 | if (TMath::Abs(z) > fCutZ) { | |
643 | //cout << "cut Z" << endl; | |
644 | return distance; | |
645 | } | |
646 | ||
647 | // compute true distance | |
648 | distance = TMath::Sqrt(x*x + y*y + z*z); | |
649 | //Double_t temp = CheckPairV2(tr, cl); | |
650 | //if (temp < distance) return temp; else | |
651 | ||
652 | // delete temporary object | |
653 | delete tr; | |
654 | ||
655 | return distance; | |
656 | } | |
657 | // | |
658 | //------------------------------------------------------------------------------ | |
659 | // | |
660 | Double_t AliEMCALTracker::CheckPairV2 | |
661 | (AliEMCALTrack *tr, AliEMCALMatchCluster *cl) | |
662 | { | |
663 | // | |
664 | // Given a track and a cluster, | |
665 | // propagates the first to the radius of the second. | |
666 | // Then, checks the propagation point against all cuts. | |
667 | // If at least a cut is not passed, a valuer equal to | |
668 | // twice the maximum allowed distance is passed (so the value returned | |
669 | // will not be taken into account when creating matches) | |
670 | // | |
671 | ||
672 | // TEMP | |
673 | // Bool_t isTrue = kFALSE; | |
674 | // if (tr->GetSeedLabel() == cl->Label()) { | |
675 | // isTrue = kTRUE; | |
676 | // cout << "TRUE MATCH!!!" << endl; | |
677 | // } | |
678 | ||
679 | Double_t distance = 2.0 * fMaxDist; | |
680 | ||
681 | Double_t x0, rho; | |
682 | if (fTrackCorrMode == kTrackCorrMMB) { | |
683 | Double_t pos1[3], pos2[3], param[6]; | |
684 | tr->GetXYZ(pos1); | |
685 | // pos1[0] = x; | |
686 | // pos1[1] = y; | |
687 | // pos1[2] = z; | |
688 | pos2[0] = cl->X(); | |
689 | pos2[1] = cl->Y(); | |
690 | pos2[2] = cl->Z(); | |
691 | MeanMaterialBudget(pos1, pos2, param); | |
692 | rho = param[0]*param[4]; | |
693 | x0 = param[1]; | |
694 | } | |
695 | else if (fTrackCorrMode == kTrackCorrFixed) { | |
696 | rho = fRho; | |
697 | x0 = fX0; | |
698 | } | |
699 | else { | |
700 | rho = 0.0; | |
701 | x0 = 0.0; | |
702 | } | |
703 | ||
704 | // check against cut on difference 'alpha - phi' | |
705 | Double_t phi = TMath::ATan2(cl->Y(), cl->X()); | |
706 | phi = AngleDiff(phi, tr->GetAlpha()); | |
707 | if (phi < fCutAlphaMin || phi > fCutAlphaMax) return distance; | |
708 | ||
709 | // get cluster position and put them into a vector | |
710 | TVector3 vc(cl->X(), cl->Y(), cl->Z()); | |
711 | // rotate the vector in order to put all clusters on a plane intersecting | |
712 | // vertically the X axis; the angle depends on the sector | |
713 | Double_t clusterRot, clusterPhi = vc.Phi() * TMath::RadToDeg(); | |
714 | if (clusterPhi < 0.0) clusterPhi += 360.0; | |
715 | if (clusterPhi < 100.0) { | |
716 | clusterRot = -90.0; | |
717 | } | |
718 | else if (clusterPhi < 120.0) { | |
719 | clusterRot = -110.0; | |
720 | } | |
721 | else if (clusterPhi < 140.0) { | |
722 | clusterRot = -130.0; | |
723 | } | |
724 | else if (clusterPhi < 160.0) { | |
725 | clusterRot = -150.0; | |
726 | } | |
727 | else if (clusterPhi < 180.0) { | |
728 | clusterRot = -170.0; | |
729 | } | |
730 | else { | |
731 | clusterRot = -190.0; | |
732 | } | |
733 | vc.RotateZ(clusterRot * TMath::DegToRad()); | |
734 | // generate a track from the ESD track selected | |
735 | AliEMCALTrack *track = new AliEMCALTrack(*tr); | |
736 | // compute the 'phi' coordinate of the intersection point to | |
737 | // the EMCAL surface | |
738 | Double_t x = vc.X(); | |
739 | Double_t y; | |
740 | track->GetYAt(vc.X(), track->GetBz(), y); | |
741 | Double_t tmp = x*TMath::Cos(track->GetAlpha()) - y*TMath::Sin(track->GetAlpha()); | |
742 | y = x*TMath::Sin(track->GetAlpha()) + y*TMath::Cos(track->GetAlpha()); | |
743 | x = tmp; | |
744 | Double_t trackPhi = TMath::ATan2(y, x) * TMath::RadToDeg(); | |
745 | // compute phi difference | |
746 | Double_t dphi = trackPhi - clusterPhi; | |
747 | if (TMath::Abs(dphi) > 180.0) { | |
748 | dphi = 360.0 - TMath::Abs(dphi); | |
749 | if (clusterPhi > trackPhi) dphi = -dphi; | |
750 | } | |
751 | // propagate track to the X position of rotated cluster | |
752 | // and get the vector of X, Y, Z in the local ref. frame of the track | |
753 | track->PropagateTo(vc.X(), x0, rho); | |
754 | TVector3 vt(track->GetX(), track->GetY(), track->GetZ()); | |
755 | vt.RotateZ((clusterPhi - trackPhi) * TMath::DegToRad()); | |
756 | TVector3 vdiff = vt-vc; | |
757 | ||
758 | // compute differences wr to each coordinate | |
759 | if (vdiff.X() > fCutX) return distance; | |
760 | if (vdiff.Y() > fCutY) return distance; | |
761 | if (vdiff.Z() > fCutZ) return distance; | |
762 | ||
763 | // compute true distance | |
764 | distance = vdiff.Mag(); | |
765 | return distance; | |
766 | } | |
767 | // | |
768 | //------------------------------------------------------------------------------ | |
769 | // | |
770 | Double_t AliEMCALTracker::CheckPairV3 | |
771 | (AliEMCALTrack *track, AliEMCALMatchCluster *cl) | |
772 | { | |
773 | // | |
774 | // Given a track and a cluster, | |
775 | // propagates the first to the radius of the second. | |
776 | // Then, checks the propagation point against all cuts. | |
777 | // If at least a cut is not passed, a valuer equal to | |
778 | // twice the maximum allowed distance is passed (so the value returned | |
779 | // will not be taken into account when creating matches) | |
780 | // | |
781 | ||
782 | AliEMCALTrack tr(*track); | |
783 | ||
784 | Int_t sector; | |
785 | Double_t distance = 2.0 * fMaxDist; | |
786 | Double_t dx, dy, dz; | |
787 | Double_t phi, alpha, slope, tgtXnum, tgtXden, sectorWidth = 20.0 * TMath::DegToRad(); | |
788 | Double_t xcurr, xprop, param[6] = {0., 0., 0., 0., 0., 0.}, x0, rho, bz; | |
789 | Double_t x[3], x1[3], x2[3]; | |
790 | ||
791 | // get initial track position | |
792 | xcurr = tr.GetX(); | |
793 | ||
794 | // evaluate the EMCAL sector number | |
795 | phi = cl->Phi(); | |
796 | if (phi < 0.0) phi += TMath::TwoPi(); | |
797 | sector = (Int_t)(phi / sectorWidth); | |
798 | alpha = ((Double_t)sector + 0.5) * sectorWidth; | |
799 | // evaluate the corresponding X for track propagation | |
800 | slope = TMath::Tan(alpha - 0.5*TMath::Pi()); | |
801 | tgtXnum = cl->Y() - slope * cl->X(); | |
802 | tgtXden = TMath::Sqrt(1.0 + slope*slope); | |
803 | xprop = TMath::Abs(tgtXnum / tgtXden); | |
804 | ||
805 | // propagate by small steps | |
806 | tr.GetXYZ(x1); | |
807 | bz = tr.GetBz(); | |
808 | if (!tr.GetXYZAt(xprop, bz, x2)) return distance; | |
809 | //AliKalmanTrack::MeanMaterialBudget(x1, x2, param); | |
810 | rho = param[0]*param[4]; | |
811 | x0 = param[1]; | |
812 | if (!tr.PropagateTo(xprop, x0, rho)) return distance; | |
813 | //if (!tr.PropagateTo(xprop, 0.0, 0.0)) return distance; | |
814 | ||
815 | // get propagated position at the end | |
816 | tr.GetXYZ(x); | |
817 | dx = TMath::Abs(x[0] - cl->X()); | |
818 | dy = TMath::Abs(x[1] - cl->Y()); | |
819 | dz = TMath::Abs(x[2] - cl->Z()); | |
820 | if (dx > fCutX || dy > fCutY || dz > fCutZ) return distance; | |
821 | ||
822 | distance = TMath::Sqrt(dx*dx + dy*dy + dz*dz); | |
823 | ||
824 | return distance; | |
825 | } | |
826 | // | |
827 | //------------------------------------------------------------------------------ | |
828 | // | |
829 | Bool_t AliEMCALTracker::PropagateToEMCAL(AliEMCALTrack *tr) | |
830 | { | |
831 | // | |
832 | // Propagates the track to the proximity of the EMCAL surface | |
833 | // | |
834 | ||
835 | Double_t xcurr, xtemp, xprop = 438.0, step = 10.0, param[6], x0, rho, bz; | |
836 | Double_t x1[3], x2[3]; | |
837 | ||
838 | // get initial track position | |
839 | xcurr = tr->GetX(); | |
840 | ||
841 | // propagate by small steps | |
842 | for (xtemp = xcurr + step; xtemp < xprop; xtemp += step) { | |
843 | // to compute material budget, take current position and | |
844 | // propagated hypothesis without energy loss | |
845 | tr->GetXYZ(x1); | |
846 | bz = tr->GetBz(); | |
847 | if (!tr->GetXYZAt(xtemp, bz, x2)) return kFALSE; | |
848 | MeanMaterialBudget(x1, x2, param); | |
849 | rho = param[0]*param[4]; | |
850 | x0 = param[1]; | |
851 | if (!tr->PropagateTo(xtemp, x0, rho)) return kFALSE; | |
852 | } | |
853 | ||
854 | return kTRUE; | |
855 | } | |
856 | // | |
857 | //------------------------------------------------------------------------------ | |
858 | // | |
859 | Int_t AliEMCALTracker::CreateMatches() | |
860 | { | |
861 | // | |
862 | // Creation of matches between tracks and clusters. | |
863 | // For each ESD track collected by ReadESD(), an AliEMCALTrack is made. | |
864 | // If it finds a cluster close enough to its propagation to EMCAL, | |
865 | // which passes all cuts, its index is stored. | |
866 | // If many clusters are found which satisfy the criteria described above, | |
867 | // only the closest one is stored. | |
868 | // At this level, it is possible that two tracks share the same cluster. | |
869 | // | |
870 | ||
871 | // if matches collection is already present, it is deleted | |
872 | if (fMatches) { | |
873 | fMatches->Delete(); | |
874 | delete fMatches; | |
875 | } | |
876 | fMatches = new TList; | |
877 | ||
878 | // initialize counters and indexes | |
879 | Int_t count = 0; | |
880 | Int_t ic, nClusters = (Int_t)fClusters->GetEntries(); | |
881 | Int_t it, nTracks = fTracks->GetEntries(); | |
882 | ||
883 | // external loop on clusters, internal loop on tracks | |
884 | Double_t dist; | |
885 | for (ic = 0; ic < nClusters; ic++) { | |
886 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic); | |
887 | for (it = 0; it < nTracks; it++) { | |
888 | AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it); | |
889 | dist = CheckPair(track, cluster); | |
890 | //cout << dist << endl; | |
891 | if (dist <= fMaxDist) { | |
892 | AliEMCALMatch *candidate = new AliEMCALMatch; | |
893 | candidate->SetIndexT(it); | |
894 | candidate->SetIndexC(ic); | |
895 | candidate->SetDistance(dist); | |
896 | candidate->SetPt(track->GetSignedPt()); | |
897 | fMatches->Add(candidate); | |
898 | count++; | |
899 | } | |
900 | } | |
901 | } | |
902 | ||
903 | /* | |
904 | // loop on clusters and tracks | |
905 | Int_t icBest; | |
906 | Double_t dist, distBest; | |
907 | for (it = 0; it < nTracks; it++) { | |
908 | AliEMCALTrack *track = (AliEMCALTrack*)fTracks->At(it); | |
909 | if (!track) continue; | |
910 | icBest = -1; | |
911 | distBest = fMaxDist; | |
912 | for (ic = 0; ic < nClusters; ic++) { | |
913 | AliEMCALMatchCluster *cluster = (AliEMCALMatchCluster*)fClusters->At(ic); | |
914 | if (!cluster) continue; | |
915 | dist = CheckPair(track, cluster); | |
916 | if (dist < distBest) { | |
917 | distBest = dist; | |
918 | icBest = ic; | |
919 | } | |
920 | } | |
921 | if (icBest >= 0) { | |
922 | track->SetMatchedClusterIndex(icBest); | |
923 | track->SetMatchedClusterDist(distBest); | |
924 | count++; | |
925 | } | |
926 | else { | |
927 | track->SetMatchedClusterIndex(-1); | |
928 | } | |
929 | } | |
930 | */ | |
931 | ||
932 | return count; | |
933 | } | |
934 | // | |
935 | //------------------------------------------------------------------------------ | |
936 | // | |
937 | Int_t AliEMCALTracker::SolveCompetitions() | |
938 | { | |
939 | // | |
940 | // Match selector. | |
941 | // The match list is sorted from the best to the worst match, w.r. to the | |
942 | // distance between track prolongation and cluster position. | |
943 | // Based on this criterion, starting from the first (best) match, a flag | |
944 | // is set to both the involved track and cluster, and all matches containing | |
945 | // an already used track or cluster are removed, leaving only the best match | |
946 | // for each cluster. | |
947 | // | |
948 | ||
949 | // sort matches with respect to track-cluster distance | |
950 | fMatches->Sort(kSortAscending); | |
951 | ||
952 | // keep track of eliminated matches | |
953 | Int_t count = 0; | |
954 | ||
955 | // initialize flags to check repetitions | |
956 | Int_t ic, nClusters = (Int_t)fClusters->GetEntries(); | |
957 | Int_t it, nTracks = fTracks->GetEntries(); | |
958 | Bool_t *usedC = new Bool_t[nClusters]; | |
959 | Bool_t *usedT = new Bool_t[nTracks]; | |
960 | for (ic = 0; ic < nClusters; ic++) usedC[ic] = kFALSE; | |
961 | for (it = 0; it < nTracks; it++) usedT[it] = kFALSE; | |
962 | ||
963 | // loop on matches | |
964 | TListIter iter(fMatches); | |
965 | AliEMCALMatch *match = 0; | |
966 | while ( (match = (AliEMCALMatch*)iter.Next()) ) { | |
967 | ic = match->GetIndexC(); | |
968 | it = match->GetIndexT(); | |
969 | if (!usedT[it] && !usedC[ic]) { | |
970 | usedT[it] = kTRUE; | |
971 | usedC[ic] = kTRUE; | |
972 | match->CanBeSaved() = kTRUE; | |
973 | } | |
974 | else { | |
975 | count++; | |
976 | } | |
977 | } | |
978 | ||
979 | /* | |
980 | Int_t it1, it2, nTracks = (Int_t)fTracks->GetEntries(); | |
981 | AliEMCALTrack *track1 = 0, *track2 = 0; | |
982 | for (it1 = 0; it1 < nTracks; it1++) { | |
983 | track1 = (AliEMCALTrack*)fTracks->At(it1); | |
984 | if (!track1) continue; | |
985 | if (track1->GetMatchedClusterIndex() < 0) continue; | |
986 | for (it2 = it1+1; it2 < nTracks; it2++) { | |
987 | track2 = (AliEMCALTrack*)fTracks->At(it2); | |
988 | if (!track2) continue; | |
989 | if (track2->GetMatchedClusterIndex() < 0) continue; | |
990 | if (track1->GetMatchedClusterIndex() != track2->GetMatchedClusterIndex()) continue; | |
991 | count++; | |
992 | if (track1->GetMatchedClusterDist() < track2->GetMatchedClusterDist()) { | |
993 | track2->SetMatchedClusterIndex(-1); | |
994 | } | |
995 | else if (track2->GetMatchedClusterDist() < track1->GetMatchedClusterDist()) { | |
996 | track1->SetMatchedClusterIndex(-1); | |
997 | } | |
998 | } | |
999 | } | |
1000 | */ | |
1001 | ||
1002 | delete [] usedC; | |
1003 | delete [] usedT; | |
1004 | ||
1005 | return count; | |
1006 | } | |
1007 | // | |
1008 | //------------------------------------------------------------------------------ | |
1009 | // | |
1010 | void AliEMCALTracker::UnloadClusters() | |
1011 | { | |
1012 | // | |
1013 | // Free memory from clusters | |
1014 | // | |
1015 | ||
1016 | Clear("CLUSTERS"); | |
1017 | } | |
1018 | // | |
1019 | //------------------------------------------------------------------------------ | |
1020 | // | |
1021 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliEMCALRecPoint *recPoint) | |
1022 | : fIndex(index), | |
1023 | fLabel(recPoint->GetPrimaryIndex()), | |
1024 | fX(0.), | |
1025 | fY(0.), | |
1026 | fZ(0.) | |
1027 | { | |
1028 | // | |
1029 | // Translates an AliEMCALRecPoint object into the internal format. | |
1030 | // Index of passed cluster in its native array must be specified. | |
1031 | // | |
1032 | TVector3 clpos; | |
1033 | recPoint->GetGlobalPosition(clpos); | |
1034 | ||
1035 | fX = clpos.X(); | |
1036 | fY = clpos.Y(); | |
1037 | fZ = clpos.Z(); | |
1038 | } | |
1039 | // | |
1040 | //------------------------------------------------------------------------------ | |
1041 | // | |
1042 | AliEMCALTracker::AliEMCALMatchCluster::AliEMCALMatchCluster(Int_t index, AliESDCaloCluster *caloCluster) | |
1043 | : fIndex(index), | |
1044 | fLabel(caloCluster->GetLabel()), | |
1045 | fX(0.), | |
1046 | fY(0.), | |
1047 | fZ(0.) | |
1048 | { | |
1049 | // | |
1050 | // Translates an AliESDCaloCluster object into the internal format. | |
1051 | // Index of passed cluster in its native array must be specified. | |
1052 | // | |
1053 | Float_t clpos[3]; | |
1054 | caloCluster->GetPosition(clpos); | |
1055 | ||
1056 | fX = (Double_t)clpos[0]; | |
1057 | fY = (Double_t)clpos[1]; | |
1058 | fZ = (Double_t)clpos[2]; | |
1059 | } | |
1060 | // | |
1061 | //------------------------------------------------------------------------------ | |
1062 | // | |
1063 | Int_t AliEMCALTracker::AliEMCALMatch::Compare(const TObject *obj) const | |
1064 | { | |
1065 | // | |
1066 | // Tracks compared wrt their distance from matched point | |
1067 | // | |
1068 | ||
1069 | AliEMCALTracker::AliEMCALMatch *that = (AliEMCALTracker::AliEMCALMatch*)obj; | |
1070 | ||
1071 | Double_t thisDist = fPt;//fDistance; | |
1072 | Double_t thatDist = that->fPt;//that->GetDistance(); | |
1073 | ||
1074 | if (thisDist > thatDist) return 1; | |
1075 | else if (thisDist < thatDist) return -1; | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | AliEMCALTracker::AliEMCALMatch::AliEMCALMatch() | |
1080 | : TObject(), | |
1081 | fCanBeSaved(kFALSE), | |
1082 | fIndexC(0), | |
1083 | fIndexT(0), | |
1084 | fDistance(0.), | |
1085 | fPt(0.) | |
1086 | { | |
1087 | //default constructor | |
1088 | ||
1089 | } | |
1090 | ||
1091 | AliEMCALTracker::AliEMCALMatch::AliEMCALMatch(const AliEMCALMatch& copy) | |
1092 | : TObject(), | |
1093 | fCanBeSaved(copy.fCanBeSaved), | |
1094 | fIndexC(copy.fIndexC), | |
1095 | fIndexT(copy.fIndexT), | |
1096 | fDistance(copy.fDistance), | |
1097 | fPt(copy.fPt) | |
1098 | { | |
1099 | //copy ctor | |
1100 | } |