]>
Commit | Line | Data |
---|---|---|
7deb8eb0 | 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 | // $Id$ | |
17 | ||
b09247a2 | 18 | #include <cstdlib> |
7deb8eb0 | 19 | #include "AliMUONRefitter.h" |
20 | #include "AliMUONGeometryTransformer.h" | |
21 | #include "AliMUONClusterFinderCOG.h" | |
22 | #include "AliMUONClusterFinderMLEM.h" | |
23 | #include "AliMUONClusterFinderSimpleFit.h" | |
24 | #include "AliMUONPreClusterFinder.h" | |
25 | #include "AliMUONPreClusterFinderV2.h" | |
26 | #include "AliMUONPreClusterFinderV3.h" | |
27 | #include "AliMUONSimpleClusterServer.h" | |
5a240757 | 28 | #include "AliMUONReconstructor.h" |
7deb8eb0 | 29 | #include "AliMUONTrackReconstructor.h" |
30 | #include "AliMUONTrackReconstructorK.h" | |
31 | #include "AliMUONRecoParam.h" | |
32 | #include "AliMUONESDInterface.h" | |
33 | #include "AliMUONVClusterStore.h" | |
34 | #include "AliMUONVTrackStore.h" | |
35 | #include "AliMUONTrack.h" | |
9bf6860b | 36 | #include "AliMUONTracker.h" |
933daf4c | 37 | #include "AliMUONTrackParam.h" |
7deb8eb0 | 38 | #include "AliLog.h" |
39 | ||
40 | //----------------------------------------------------------------------------- | |
41 | /// \class AliMUONRefitter | |
42 | /// | |
ad3c6eda | 43 | /// This class has been developped to simplify the re-reconstruction of the MUON tracks |
44 | /// stored into ESD with different recoParams and/or after having re-calibrated the digits. | |
45 | /// It creates new MUON object from ESD objects given as input (through the ESDInterface) then: | |
7deb8eb0 | 46 | /// |
47 | /// - re-clusterize the ESD clusters using the attached ESD pads | |
48 | /// (several new clusters can be reconstructed per ESD cluster) | |
49 | /// - re-fit the ESD tracks using the attached ESD clusters | |
50 | /// - reconstruct the ESD tracks from ESD pads (i.e. re-clusterized the attached clusters) | |
51 | /// | |
52 | /// note: | |
53 | /// - connexion between an ESD cluster and corresponding MUON clusters from re-clustering | |
54 | /// can be made through the detection element ID | |
55 | /// - connexion between an ESD track and the corresponding refitted MUON track | |
56 | /// can be made through their unique ID | |
57 | /// | |
58 | /// \author Philippe Pillot | |
59 | //----------------------------------------------------------------------------- | |
60 | ||
61 | /// \cond CLASSIMP | |
62 | ClassImp(AliMUONRefitter) | |
63 | /// \endcond | |
64 | ||
65 | //_____________________________________________________________________________ | |
a0dc65b4 | 66 | AliMUONRefitter::AliMUONRefitter(const AliMUONRecoParam* recoParam) |
7deb8eb0 | 67 | : TObject(), |
5a240757 | 68 | fkRecoParam(recoParam), |
69 | fkESDInterface(0x0), | |
7deb8eb0 | 70 | fGeometryTransformer(0x0), |
71 | fClusterServer(0x0), | |
5a240757 | 72 | fTracker(0x0) |
7deb8eb0 | 73 | { |
74 | /// Default constructor | |
75 | CreateGeometryTransformer(); | |
76 | CreateClusterServer(*fGeometryTransformer); | |
a0dc65b4 | 77 | if (fClusterServer) fTracker = AliMUONTracker::CreateTrackReconstructor(recoParam,fClusterServer); |
7deb8eb0 | 78 | if (!fClusterServer || !fTracker) { |
79 | AliFatal("refitter initialization failed"); | |
80 | exit(-1); | |
81 | } | |
82 | } | |
83 | ||
84 | //_____________________________________________________________________________ | |
85 | AliMUONRefitter::~AliMUONRefitter() | |
86 | { | |
87 | /// Destructor | |
88 | delete fGeometryTransformer; | |
89 | delete fClusterServer; | |
90 | delete fTracker; | |
91 | } | |
92 | ||
93 | //_____________________________________________________________________________ | |
94 | AliMUONVTrackStore* AliMUONRefitter::ReconstructFromDigits() | |
95 | { | |
96 | /// re-reconstruct all tracks and attached clusters from the digits | |
97 | /// it is the responsability of the user to delete the returned store | |
98 | ||
5a240757 | 99 | if (!fkESDInterface) { |
7deb8eb0 | 100 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
101 | return 0x0; | |
102 | } | |
103 | ||
104 | // prepare new track(s) | |
105 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
106 | if (!newTrackStore) return 0x0; | |
107 | ||
108 | // loop over tracks and refit them (create new tracks) | |
630711ed | 109 | AliMUONTrack *track; |
5a240757 | 110 | TIter next(fkESDInterface->CreateTrackIterator()); |
630711ed | 111 | while ((track = static_cast<AliMUONTrack*>(next()))) { |
112 | AliMUONTrack *newTrack = RetrackFromDigits(*track); | |
ad6250dc | 113 | if (newTrack) newTrackStore->Add(newTrack); |
630711ed | 114 | delete newTrack; |
7deb8eb0 | 115 | } |
116 | ||
117 | return newTrackStore; | |
118 | } | |
119 | ||
120 | //_____________________________________________________________________________ | |
121 | AliMUONVTrackStore* AliMUONRefitter::ReconstructFromClusters() | |
122 | { | |
123 | /// refit all tracks from the attached clusters | |
124 | /// it is the responsability of the user to delete the returned store | |
125 | ||
5a240757 | 126 | if (!fkESDInterface) { |
7deb8eb0 | 127 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
128 | return 0x0; | |
129 | } | |
130 | ||
131 | // prepare new track(s) | |
132 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
133 | if (!newTrackStore) return 0x0; | |
134 | ||
135 | // loop over tracks and refit them (create new tracks) | |
136 | AliMUONTrack *track; | |
5a240757 | 137 | TIter next(fkESDInterface->CreateTrackIterator()); |
7deb8eb0 | 138 | while ((track = static_cast<AliMUONTrack*>(next()))) { |
139 | AliMUONTrack* newTrack = newTrackStore->Add(*track); | |
140 | if (!fTracker->RefitTrack(*newTrack)) newTrackStore->Remove(*newTrack); | |
141 | } | |
142 | ||
143 | return newTrackStore; | |
144 | } | |
145 | ||
146 | //_____________________________________________________________________________ | |
630711ed | 147 | AliMUONTrack* AliMUONRefitter::RetrackFromDigits(UInt_t trackId) |
7deb8eb0 | 148 | { |
630711ed | 149 | /// refit track "trackId" from the digits (i.e. re-clusterized the attached clusters) |
7deb8eb0 | 150 | /// it is the responsability of the user to delete the returned track |
151 | ||
5a240757 | 152 | if (!fkESDInterface) { |
7deb8eb0 | 153 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
154 | return 0x0; | |
155 | } | |
156 | ||
157 | // get the track to refit | |
5a240757 | 158 | AliMUONTrack* track = fkESDInterface->FindTrack(trackId); |
7deb8eb0 | 159 | |
630711ed | 160 | return track ? RetrackFromDigits(*track) : 0x0; |
7deb8eb0 | 161 | } |
162 | ||
163 | //_____________________________________________________________________________ | |
630711ed | 164 | AliMUONTrack* AliMUONRefitter::RetrackFromClusters(UInt_t trackId) |
7deb8eb0 | 165 | { |
2e2d0c44 | 166 | /// refit track "trackId" from the clusters (i.e. do not re-clusterize) |
7deb8eb0 | 167 | /// it is the responsability of the user to delete the returned track |
168 | ||
5a240757 | 169 | if (!fkESDInterface) { |
7deb8eb0 | 170 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
171 | return 0x0; | |
172 | } | |
173 | ||
174 | // get the track to refit | |
5a240757 | 175 | AliMUONTrack* track = fkESDInterface->FindTrack(trackId); |
7deb8eb0 | 176 | if (!track) return 0x0; |
177 | ||
178 | // refit the track (create a new one) | |
179 | AliMUONTrack* newTrack = new AliMUONTrack(*track); | |
180 | if (!fTracker->RefitTrack(*newTrack)) { | |
181 | delete newTrack; | |
182 | return 0x0; | |
183 | } | |
184 | ||
185 | return newTrack; | |
186 | } | |
187 | ||
188 | //_____________________________________________________________________________ | |
630711ed | 189 | AliMUONVClusterStore* AliMUONRefitter::ReClusterize(UInt_t trackId, UInt_t clusterId) |
7deb8eb0 | 190 | { |
630711ed | 191 | /// re-clusterize cluster numbered "clusterId" in track "trackId" |
7deb8eb0 | 192 | /// several new clusters may be reconstructed |
193 | /// it is the responsability of the user to delete the returned store | |
194 | ||
5a240757 | 195 | if (!fkESDInterface) { |
7deb8eb0 | 196 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
197 | return 0x0; | |
198 | } | |
199 | ||
200 | // get the cluster to re-clusterize | |
5a240757 | 201 | AliMUONVCluster* cluster = fkESDInterface->FindCluster(trackId,clusterId); |
7deb8eb0 | 202 | if (!cluster) return 0x0; |
203 | ||
204 | // check if digits exist | |
205 | if (cluster->GetNDigits() == 0) { | |
630711ed | 206 | AliError(Form("no digit attached to cluster #%d in track %d",clusterId,trackId)); |
7deb8eb0 | 207 | return 0x0; |
208 | } | |
209 | ||
210 | // create the cluster store | |
211 | AliMUONVClusterStore* clusterStore = AliMUONESDInterface::NewClusterStore(); | |
212 | if (!clusterStore) return 0x0; | |
213 | ||
214 | // re-clusterize | |
5a240757 | 215 | TIter next(fkESDInterface->CreateDigitIterator(trackId, clusterId)); |
2e2d0c44 | 216 | fClusterServer->UseDigits(next,fkESDInterface->GetDigits()); |
5a240757 | 217 | fClusterServer->Clusterize(cluster->GetChamberId(),*clusterStore,AliMpArea(),fkRecoParam); |
7deb8eb0 | 218 | |
219 | return clusterStore; | |
220 | } | |
221 | ||
222 | //_____________________________________________________________________________ | |
223 | AliMUONVClusterStore* AliMUONRefitter::ReClusterize(UInt_t clusterId) | |
224 | { | |
225 | /// re-clusterize cluster "clusterId" | |
226 | /// several new clusters may be reconstructed | |
227 | /// it is the responsability of the user to delete the returned store | |
228 | ||
5a240757 | 229 | if (!fkESDInterface) { |
7deb8eb0 | 230 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); |
231 | return 0x0; | |
232 | } | |
233 | ||
234 | // get the cluster to re-clusterize | |
5a240757 | 235 | AliMUONVCluster* cluster = fkESDInterface->FindCluster(clusterId); |
7deb8eb0 | 236 | if (!cluster) return 0x0; |
237 | ||
238 | // check if digits exist | |
239 | if (cluster->GetNDigits() == 0) { | |
240 | AliError(Form("no digit attached to cluster %d",clusterId)); | |
241 | return 0x0; | |
242 | } | |
243 | ||
244 | // create the cluster store | |
245 | AliMUONVClusterStore* clusterStore = AliMUONESDInterface::NewClusterStore(); | |
246 | if (!clusterStore) return 0x0; | |
247 | ||
248 | // re-clusterize | |
5a240757 | 249 | TIter next(fkESDInterface->CreateDigitIteratorInCluster(clusterId)); |
2e2d0c44 | 250 | fClusterServer->UseDigits(next,fkESDInterface->GetDigits()); |
5a240757 | 251 | fClusterServer->Clusterize(cluster->GetChamberId(),*clusterStore,AliMpArea(),fkRecoParam); |
7deb8eb0 | 252 | |
253 | return clusterStore; | |
254 | } | |
255 | ||
256 | //_____________________________________________________________________________ | |
257 | void AliMUONRefitter::CreateGeometryTransformer() | |
258 | { | |
259 | /// Create geometry transformer (local<->global) | |
260 | /// and load geometry data | |
261 | fGeometryTransformer = new AliMUONGeometryTransformer(); | |
262 | fGeometryTransformer->LoadGeometryData(); | |
263 | } | |
264 | ||
265 | //_____________________________________________________________________________ | |
266 | void AliMUONRefitter::CreateClusterServer(AliMUONGeometryTransformer& transformer) | |
267 | { | |
268 | /// Create cluster server | |
5a240757 | 269 | AliMUONVClusterFinder* clusterFinder = AliMUONReconstructor::CreateClusterFinder(fkRecoParam->GetClusteringMode()); |
9bf6860b | 270 | fClusterServer = clusterFinder ? new AliMUONSimpleClusterServer(clusterFinder,transformer) : 0x0; |
7deb8eb0 | 271 | } |
272 | ||
630711ed | 273 | //_____________________________________________________________________________ |
274 | AliMUONTrack* AliMUONRefitter::RetrackFromDigits(const AliMUONTrack& track) | |
275 | { | |
276 | /// refit the given track from the digits (i.e. re-clusterized the attached clusters): | |
277 | /// several new clusters may be reconstructed per initial ESD cluster: | |
278 | /// -> all the combinations of clusters are considered to build the new tracks | |
279 | /// -> return the best track (largest number of clusters or best chi2 in case of equality) | |
280 | ||
281 | // check if digits exist | |
282 | UInt_t trackId = track.GetUniqueID(); | |
5a240757 | 283 | if (fkESDInterface->GetNDigits(trackId) == 0) { |
630711ed | 284 | AliError(Form("no digit attached to track #%d",trackId)); |
285 | return 0x0; | |
286 | } | |
287 | ||
288 | // prepare new track(s) | |
289 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
290 | if (!newTrackStore) return 0x0; | |
291 | newTrackStore->Add(track)->Clear("C"); | |
292 | ||
293 | // prepare new cluster store | |
294 | AliMUONVClusterStore* newClusterStore = AliMUONESDInterface::NewClusterStore(); | |
295 | if (!newClusterStore) { | |
296 | delete newTrackStore; | |
297 | return 0x0; | |
298 | } | |
299 | ||
300 | // loop over clusters, re-clusterize and build new tracks | |
301 | AliMUONVCluster* cluster; | |
5a240757 | 302 | TIter nextCluster(fkESDInterface->CreateClusterIterator(trackId)); |
630711ed | 303 | while ((cluster = static_cast<AliMUONVCluster*>(nextCluster()))) { |
304 | ||
305 | // reset the new cluster store | |
306 | newClusterStore->Clear(); | |
307 | ||
308 | // re-clusterize current cluster | |
5a240757 | 309 | TIter nextDigit(fkESDInterface->CreateDigitIterator(trackId, cluster->GetUniqueID())); |
2e2d0c44 | 310 | fClusterServer->UseDigits(nextDigit,fkESDInterface->GetDigits()); |
5a240757 | 311 | Int_t nNewClusters = fClusterServer->Clusterize(cluster->GetChamberId(),*newClusterStore,AliMpArea(),fkRecoParam); |
630711ed | 312 | |
313 | // check that re-clusterizing succeeded | |
314 | if (nNewClusters == 0) { | |
315 | AliWarning(Form("refit gave no cluster (chamber %d)",cluster->GetChamberId())); | |
316 | AliInfo("initial ESD cluster:"); | |
317 | cluster->Print("FULL"); | |
318 | continue; | |
319 | } | |
320 | ||
321 | // add the new cluster(s) to the tracks | |
ad6250dc | 322 | if (!AddClusterToTracks(*newClusterStore, *newTrackStore)) { |
323 | delete newClusterStore; | |
324 | delete newTrackStore; | |
325 | return 0x0; | |
326 | } | |
630711ed | 327 | |
328 | } | |
329 | ||
ad6250dc | 330 | if (newTrackStore->GetSize() > 1000) AliInfo(Form("%d tracks to refit... be patient!!",newTrackStore->GetSize())); |
331 | ||
630711ed | 332 | // refit the tracks and pick up the best one |
333 | AliMUONTrack *currentTrack, *bestTrack = 0x0; | |
4ea3f013 | 334 | Double_t currentChi2, bestChi2 = AliMUONTrack::MaxChi2(); |
630711ed | 335 | Int_t currentNCluster, bestNClusters = 0; |
336 | TIter next(newTrackStore->CreateIterator()); | |
337 | while ((currentTrack = static_cast<AliMUONTrack*>(next()))) { | |
338 | ||
339 | // set the track parameters at first cluster if any (used as seed in original tracking) | |
340 | AliMUONTrackParam* param = (AliMUONTrackParam*) currentTrack->GetTrackParamAtCluster()->First(); | |
341 | if (param) *param = *((AliMUONTrackParam*) track.GetTrackParamAtCluster()->First()); | |
342 | ||
343 | // refit the track | |
ad6250dc | 344 | if (!fTracker->RefitTrack(*currentTrack)) continue; |
630711ed | 345 | |
346 | // find best track (the one with the higher number of cluster or the best chi2 in case of equality) | |
347 | currentNCluster = currentTrack->GetNClusters(); | |
348 | currentChi2 = currentTrack->GetGlobalChi2(); | |
349 | if (currentNCluster > bestNClusters || (currentNCluster == bestNClusters && currentChi2 < bestChi2)) { | |
350 | bestTrack = currentTrack; | |
351 | bestNClusters = currentNCluster; | |
352 | bestChi2 = currentChi2; | |
353 | } | |
354 | ||
355 | } | |
356 | ||
357 | // copy best track and free memory | |
358 | AliMUONTrack* newTrack = bestTrack ? new AliMUONTrack(*bestTrack) : 0x0; | |
359 | delete newClusterStore; | |
360 | delete newTrackStore; | |
361 | ||
362 | return newTrack; | |
363 | } | |
364 | ||
7deb8eb0 | 365 | //_____________________________________________________________________________ |
ad6250dc | 366 | Bool_t AliMUONRefitter::AddClusterToTracks(const AliMUONVClusterStore &clusterStore, AliMUONVTrackStore &trackStore) |
7deb8eb0 | 367 | { |
368 | /// add clusters to each of the given tracks | |
369 | /// duplicate the tracks if there are several clusters and add one cluster per copy | |
370 | ||
371 | // create new track store if there are more than 1 cluster to add per track | |
372 | Int_t nClusters = clusterStore.GetSize(); | |
ad6250dc | 373 | if (nClusters < 1) return kTRUE; |
374 | ||
375 | // check if we will exceed the maximum allowed number of tracks | |
376 | if (nClusters * trackStore.GetSize() > fkRecoParam->GetMaxTrackCandidates()) { | |
377 | AliError(Form("Too many track candidates (%d tracks). Stop refitting.", nClusters * trackStore.GetSize())); | |
378 | return kFALSE; | |
379 | } | |
7deb8eb0 | 380 | |
381 | AliMUONTrackParam dummyParam; | |
382 | AliMUONTrack *currentTrack, *track; | |
383 | AliMUONVCluster *newCluster; | |
384 | Int_t nTracks = trackStore.GetSize(); | |
385 | Int_t iTrack = 0; | |
386 | Int_t iCluster = 0; | |
387 | ||
388 | // loop over existing tracks to add the cluster(s) | |
389 | TIter nextTrack(trackStore.CreateIterator()); | |
390 | while ((currentTrack = static_cast<AliMUONTrack*>(nextTrack())) && (iTrack < nTracks)) { | |
391 | ||
392 | iTrack++; | |
393 | ||
394 | // add the new cluster(s) to the tracks | |
395 | // duplicate the tracks if there are several clusters | |
ad6250dc | 396 | // stop the loop after loading the last cluster which is added to the current track |
7deb8eb0 | 397 | iCluster = 0; |
398 | TIter nextCluster(clusterStore.CreateIterator()); | |
399 | while ((newCluster = static_cast<AliMUONVCluster*>(nextCluster())) && (iCluster < nClusters - 1)) { | |
400 | ||
401 | iCluster++; | |
402 | ||
403 | // add a copy of the current track to the store | |
404 | track = trackStore.Add(AliMUONTrack(*currentTrack)); | |
405 | ||
406 | // only set Z parameter to avoid error in AddTrackParamAtCluster() | |
407 | // the rest will be recomputed during refit | |
408 | dummyParam.SetZ(newCluster->GetZ()); | |
409 | ||
410 | // add new cluster to the new track | |
411 | track->AddTrackParamAtCluster(dummyParam, *newCluster, kTRUE); | |
412 | ||
413 | } | |
414 | ||
415 | // only set Z parameter to avoid error in AddTrackParamAtCluster() | |
416 | // the rest will be recomputed during refit | |
417 | dummyParam.SetZ(newCluster->GetZ()); | |
418 | ||
419 | // add new cluster to the current track | |
420 | currentTrack->AddTrackParamAtCluster(dummyParam, *newCluster, kTRUE); | |
421 | ||
422 | } | |
423 | ||
ad6250dc | 424 | return kTRUE; |
425 | ||
7deb8eb0 | 426 | } |
427 |