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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" | |
28 | #include "AliMUONTrackReconstructor.h" | |
29 | #include "AliMUONTrackReconstructorK.h" | |
30 | #include "AliMUONRecoParam.h" | |
31 | #include "AliMUONESDInterface.h" | |
32 | #include "AliMUONVClusterStore.h" | |
33 | #include "AliMUONVTrackStore.h" | |
34 | #include "AliMUONTrack.h" | |
9bf6860b | 35 | #include "AliMUONTracker.h" |
7deb8eb0 | 36 | #include "AliLog.h" |
37 | ||
38 | //----------------------------------------------------------------------------- | |
39 | /// \class AliMUONRefitter | |
40 | /// | |
41 | /// create new MUON object from ESD objects given as input (through the ESDInterface): | |
42 | /// | |
43 | /// - re-clusterize the ESD clusters using the attached ESD pads | |
44 | /// (several new clusters can be reconstructed per ESD cluster) | |
45 | /// - re-fit the ESD tracks using the attached ESD clusters | |
46 | /// - reconstruct the ESD tracks from ESD pads (i.e. re-clusterized the attached clusters) | |
47 | /// | |
48 | /// note: | |
49 | /// - connexion between an ESD cluster and corresponding MUON clusters from re-clustering | |
50 | /// can be made through the detection element ID | |
51 | /// - connexion between an ESD track and the corresponding refitted MUON track | |
52 | /// can be made through their unique ID | |
53 | /// | |
54 | /// \author Philippe Pillot | |
55 | //----------------------------------------------------------------------------- | |
56 | ||
57 | /// \cond CLASSIMP | |
58 | ClassImp(AliMUONRefitter) | |
59 | /// \endcond | |
60 | ||
61 | //_____________________________________________________________________________ | |
62 | AliMUONRefitter::AliMUONRefitter() | |
63 | : TObject(), | |
64 | fGeometryTransformer(0x0), | |
65 | fClusterServer(0x0), | |
66 | fTracker(0x0), | |
67 | fESDInterface(0x0) | |
68 | { | |
69 | /// Default constructor | |
70 | CreateGeometryTransformer(); | |
71 | CreateClusterServer(*fGeometryTransformer); | |
00dc4f26 | 72 | if (fClusterServer) fTracker = AliMUONTracker::CreateTrackReconstructor(AliMUONReconstructor::GetRecoParam()->GetTrackingMode(),fClusterServer); |
7deb8eb0 | 73 | if (!fClusterServer || !fTracker) { |
74 | AliFatal("refitter initialization failed"); | |
75 | exit(-1); | |
76 | } | |
77 | } | |
78 | ||
79 | //_____________________________________________________________________________ | |
80 | AliMUONRefitter::~AliMUONRefitter() | |
81 | { | |
82 | /// Destructor | |
83 | delete fGeometryTransformer; | |
84 | delete fClusterServer; | |
85 | delete fTracker; | |
86 | } | |
87 | ||
88 | //_____________________________________________________________________________ | |
89 | AliMUONVTrackStore* AliMUONRefitter::ReconstructFromDigits() | |
90 | { | |
91 | /// re-reconstruct all tracks and attached clusters from the digits | |
92 | /// it is the responsability of the user to delete the returned store | |
93 | ||
94 | if (!fESDInterface) { | |
95 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
96 | return 0x0; | |
97 | } | |
98 | ||
99 | // prepare new track(s) | |
100 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
101 | if (!newTrackStore) return 0x0; | |
102 | ||
103 | // loop over tracks and refit them (create new tracks) | |
630711ed | 104 | AliMUONTrack *track; |
105 | TIter next(fESDInterface->CreateTrackIterator()); | |
106 | while ((track = static_cast<AliMUONTrack*>(next()))) { | |
107 | AliMUONTrack *newTrack = RetrackFromDigits(*track); | |
108 | newTrackStore->Add(newTrack); | |
109 | delete newTrack; | |
7deb8eb0 | 110 | } |
111 | ||
112 | return newTrackStore; | |
113 | } | |
114 | ||
115 | //_____________________________________________________________________________ | |
116 | AliMUONVTrackStore* AliMUONRefitter::ReconstructFromClusters() | |
117 | { | |
118 | /// refit all tracks from the attached clusters | |
119 | /// it is the responsability of the user to delete the returned store | |
120 | ||
121 | if (!fESDInterface) { | |
122 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
123 | return 0x0; | |
124 | } | |
125 | ||
126 | // prepare new track(s) | |
127 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
128 | if (!newTrackStore) return 0x0; | |
129 | ||
130 | // loop over tracks and refit them (create new tracks) | |
131 | AliMUONTrack *track; | |
132 | TIter next(fESDInterface->CreateTrackIterator()); | |
133 | while ((track = static_cast<AliMUONTrack*>(next()))) { | |
134 | AliMUONTrack* newTrack = newTrackStore->Add(*track); | |
135 | if (!fTracker->RefitTrack(*newTrack)) newTrackStore->Remove(*newTrack); | |
136 | } | |
137 | ||
138 | return newTrackStore; | |
139 | } | |
140 | ||
141 | //_____________________________________________________________________________ | |
630711ed | 142 | AliMUONTrack* AliMUONRefitter::RetrackFromDigits(UInt_t trackId) |
7deb8eb0 | 143 | { |
630711ed | 144 | /// refit track "trackId" from the digits (i.e. re-clusterized the attached clusters) |
7deb8eb0 | 145 | /// it is the responsability of the user to delete the returned track |
146 | ||
147 | if (!fESDInterface) { | |
148 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
149 | return 0x0; | |
150 | } | |
151 | ||
152 | // get the track to refit | |
630711ed | 153 | AliMUONTrack* track = fESDInterface->FindTrack(trackId); |
7deb8eb0 | 154 | |
630711ed | 155 | return track ? RetrackFromDigits(*track) : 0x0; |
7deb8eb0 | 156 | } |
157 | ||
158 | //_____________________________________________________________________________ | |
630711ed | 159 | AliMUONTrack* AliMUONRefitter::RetrackFromClusters(UInt_t trackId) |
7deb8eb0 | 160 | { |
630711ed | 161 | /// refit track "trackId" form the clusters (i.e. do not re-clusterize) |
7deb8eb0 | 162 | /// it is the responsability of the user to delete the returned track |
163 | ||
164 | if (!fESDInterface) { | |
165 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
166 | return 0x0; | |
167 | } | |
168 | ||
169 | // get the track to refit | |
630711ed | 170 | AliMUONTrack* track = fESDInterface->FindTrack(trackId); |
7deb8eb0 | 171 | if (!track) return 0x0; |
172 | ||
173 | // refit the track (create a new one) | |
174 | AliMUONTrack* newTrack = new AliMUONTrack(*track); | |
175 | if (!fTracker->RefitTrack(*newTrack)) { | |
176 | delete newTrack; | |
177 | return 0x0; | |
178 | } | |
179 | ||
180 | return newTrack; | |
181 | } | |
182 | ||
183 | //_____________________________________________________________________________ | |
630711ed | 184 | AliMUONVClusterStore* AliMUONRefitter::ReClusterize(UInt_t trackId, UInt_t clusterId) |
7deb8eb0 | 185 | { |
630711ed | 186 | /// re-clusterize cluster numbered "clusterId" in track "trackId" |
7deb8eb0 | 187 | /// several new clusters may be reconstructed |
188 | /// it is the responsability of the user to delete the returned store | |
189 | ||
190 | if (!fESDInterface) { | |
191 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
192 | return 0x0; | |
193 | } | |
194 | ||
195 | // get the cluster to re-clusterize | |
630711ed | 196 | AliMUONVCluster* cluster = fESDInterface->FindCluster(trackId,clusterId); |
7deb8eb0 | 197 | if (!cluster) return 0x0; |
198 | ||
199 | // check if digits exist | |
200 | if (cluster->GetNDigits() == 0) { | |
630711ed | 201 | AliError(Form("no digit attached to cluster #%d in track %d",clusterId,trackId)); |
7deb8eb0 | 202 | return 0x0; |
203 | } | |
204 | ||
205 | // create the cluster store | |
206 | AliMUONVClusterStore* clusterStore = AliMUONESDInterface::NewClusterStore(); | |
207 | if (!clusterStore) return 0x0; | |
208 | ||
209 | // re-clusterize | |
630711ed | 210 | TIter next(fESDInterface->CreateDigitIterator(trackId, clusterId)); |
7deb8eb0 | 211 | fClusterServer->UseDigits(next); |
212 | fClusterServer->Clusterize(cluster->GetChamberId(),*clusterStore,AliMpArea()); | |
213 | ||
214 | return clusterStore; | |
215 | } | |
216 | ||
217 | //_____________________________________________________________________________ | |
218 | AliMUONVClusterStore* AliMUONRefitter::ReClusterize(UInt_t clusterId) | |
219 | { | |
220 | /// re-clusterize cluster "clusterId" | |
221 | /// several new clusters may be reconstructed | |
222 | /// it is the responsability of the user to delete the returned store | |
223 | ||
224 | if (!fESDInterface) { | |
225 | AliError("the refitter must be connected to an ESDInterface containing the ESD event to reconstruct"); | |
226 | return 0x0; | |
227 | } | |
228 | ||
229 | // get the cluster to re-clusterize | |
230 | AliMUONVCluster* cluster = fESDInterface->FindCluster(clusterId); | |
231 | if (!cluster) return 0x0; | |
232 | ||
233 | // check if digits exist | |
234 | if (cluster->GetNDigits() == 0) { | |
235 | AliError(Form("no digit attached to cluster %d",clusterId)); | |
236 | return 0x0; | |
237 | } | |
238 | ||
239 | // create the cluster store | |
240 | AliMUONVClusterStore* clusterStore = AliMUONESDInterface::NewClusterStore(); | |
241 | if (!clusterStore) return 0x0; | |
242 | ||
243 | // re-clusterize | |
244 | TIter next(fESDInterface->CreateDigitIteratorInCluster(clusterId)); | |
245 | fClusterServer->UseDigits(next); | |
246 | fClusterServer->Clusterize(cluster->GetChamberId(),*clusterStore,AliMpArea()); | |
247 | ||
248 | return clusterStore; | |
249 | } | |
250 | ||
251 | //_____________________________________________________________________________ | |
252 | void AliMUONRefitter::CreateGeometryTransformer() | |
253 | { | |
254 | /// Create geometry transformer (local<->global) | |
255 | /// and load geometry data | |
256 | fGeometryTransformer = new AliMUONGeometryTransformer(); | |
257 | fGeometryTransformer->LoadGeometryData(); | |
258 | } | |
259 | ||
260 | //_____________________________________________________________________________ | |
261 | void AliMUONRefitter::CreateClusterServer(AliMUONGeometryTransformer& transformer) | |
262 | { | |
263 | /// Create cluster server | |
9bf6860b | 264 | AliMUONVClusterFinder* clusterFinder = AliMUONReconstructor::CreateClusterFinder(AliMUONReconstructor::GetRecoParam()->GetClusteringMode()); |
265 | fClusterServer = clusterFinder ? new AliMUONSimpleClusterServer(clusterFinder,transformer) : 0x0; | |
7deb8eb0 | 266 | } |
267 | ||
630711ed | 268 | //_____________________________________________________________________________ |
269 | AliMUONTrack* AliMUONRefitter::RetrackFromDigits(const AliMUONTrack& track) | |
270 | { | |
271 | /// refit the given track from the digits (i.e. re-clusterized the attached clusters): | |
272 | /// several new clusters may be reconstructed per initial ESD cluster: | |
273 | /// -> all the combinations of clusters are considered to build the new tracks | |
274 | /// -> return the best track (largest number of clusters or best chi2 in case of equality) | |
275 | ||
276 | // check if digits exist | |
277 | UInt_t trackId = track.GetUniqueID(); | |
278 | if (fESDInterface->GetNDigits(trackId) == 0) { | |
279 | AliError(Form("no digit attached to track #%d",trackId)); | |
280 | return 0x0; | |
281 | } | |
282 | ||
283 | // prepare new track(s) | |
284 | AliMUONVTrackStore* newTrackStore = AliMUONESDInterface::NewTrackStore(); | |
285 | if (!newTrackStore) return 0x0; | |
286 | newTrackStore->Add(track)->Clear("C"); | |
287 | ||
288 | // prepare new cluster store | |
289 | AliMUONVClusterStore* newClusterStore = AliMUONESDInterface::NewClusterStore(); | |
290 | if (!newClusterStore) { | |
291 | delete newTrackStore; | |
292 | return 0x0; | |
293 | } | |
294 | ||
295 | // loop over clusters, re-clusterize and build new tracks | |
296 | AliMUONVCluster* cluster; | |
297 | TIter nextCluster(fESDInterface->CreateClusterIterator(trackId)); | |
298 | while ((cluster = static_cast<AliMUONVCluster*>(nextCluster()))) { | |
299 | ||
300 | // reset the new cluster store | |
301 | newClusterStore->Clear(); | |
302 | ||
303 | // re-clusterize current cluster | |
304 | TIter nextDigit(fESDInterface->CreateDigitIterator(trackId, cluster->GetUniqueID())); | |
305 | fClusterServer->UseDigits(nextDigit); | |
306 | Int_t nNewClusters = fClusterServer->Clusterize(cluster->GetChamberId(),*newClusterStore,AliMpArea()); | |
307 | ||
308 | // check that re-clusterizing succeeded | |
309 | if (nNewClusters == 0) { | |
310 | AliWarning(Form("refit gave no cluster (chamber %d)",cluster->GetChamberId())); | |
311 | AliInfo("initial ESD cluster:"); | |
312 | cluster->Print("FULL"); | |
313 | continue; | |
314 | } | |
315 | ||
316 | // add the new cluster(s) to the tracks | |
317 | AddClusterToTracks(*newClusterStore, *newTrackStore); | |
318 | ||
319 | } | |
320 | ||
321 | // refit the tracks and pick up the best one | |
322 | AliMUONTrack *currentTrack, *bestTrack = 0x0; | |
323 | Double_t currentChi2, bestChi2 = 1.e10; | |
324 | Int_t currentNCluster, bestNClusters = 0; | |
325 | TIter next(newTrackStore->CreateIterator()); | |
326 | while ((currentTrack = static_cast<AliMUONTrack*>(next()))) { | |
327 | ||
328 | // set the track parameters at first cluster if any (used as seed in original tracking) | |
329 | AliMUONTrackParam* param = (AliMUONTrackParam*) currentTrack->GetTrackParamAtCluster()->First(); | |
330 | if (param) *param = *((AliMUONTrackParam*) track.GetTrackParamAtCluster()->First()); | |
331 | ||
332 | // refit the track | |
333 | if (!fTracker->RefitTrack(*currentTrack)) break; | |
334 | ||
335 | // find best track (the one with the higher number of cluster or the best chi2 in case of equality) | |
336 | currentNCluster = currentTrack->GetNClusters(); | |
337 | currentChi2 = currentTrack->GetGlobalChi2(); | |
338 | if (currentNCluster > bestNClusters || (currentNCluster == bestNClusters && currentChi2 < bestChi2)) { | |
339 | bestTrack = currentTrack; | |
340 | bestNClusters = currentNCluster; | |
341 | bestChi2 = currentChi2; | |
342 | } | |
343 | ||
344 | } | |
345 | ||
346 | // copy best track and free memory | |
347 | AliMUONTrack* newTrack = bestTrack ? new AliMUONTrack(*bestTrack) : 0x0; | |
348 | delete newClusterStore; | |
349 | delete newTrackStore; | |
350 | ||
351 | return newTrack; | |
352 | } | |
353 | ||
7deb8eb0 | 354 | //_____________________________________________________________________________ |
355 | void AliMUONRefitter::AddClusterToTracks(const AliMUONVClusterStore &clusterStore, AliMUONVTrackStore &trackStore) | |
356 | { | |
357 | /// add clusters to each of the given tracks | |
358 | /// duplicate the tracks if there are several clusters and add one cluster per copy | |
359 | ||
360 | // create new track store if there are more than 1 cluster to add per track | |
361 | Int_t nClusters = clusterStore.GetSize(); | |
362 | if (nClusters < 1) return; | |
363 | ||
364 | AliMUONTrackParam dummyParam; | |
365 | AliMUONTrack *currentTrack, *track; | |
366 | AliMUONVCluster *newCluster; | |
367 | Int_t nTracks = trackStore.GetSize(); | |
368 | Int_t iTrack = 0; | |
369 | Int_t iCluster = 0; | |
370 | ||
371 | // loop over existing tracks to add the cluster(s) | |
372 | TIter nextTrack(trackStore.CreateIterator()); | |
373 | while ((currentTrack = static_cast<AliMUONTrack*>(nextTrack())) && (iTrack < nTracks)) { | |
374 | ||
375 | iTrack++; | |
376 | ||
377 | // add the new cluster(s) to the tracks | |
378 | // duplicate the tracks if there are several clusters | |
379 | // the loop after loading the last cluster which is added to the current track | |
380 | iCluster = 0; | |
381 | TIter nextCluster(clusterStore.CreateIterator()); | |
382 | while ((newCluster = static_cast<AliMUONVCluster*>(nextCluster())) && (iCluster < nClusters - 1)) { | |
383 | ||
384 | iCluster++; | |
385 | ||
386 | // add a copy of the current track to the store | |
387 | track = trackStore.Add(AliMUONTrack(*currentTrack)); | |
388 | ||
389 | // only set Z parameter to avoid error in AddTrackParamAtCluster() | |
390 | // the rest will be recomputed during refit | |
391 | dummyParam.SetZ(newCluster->GetZ()); | |
392 | ||
393 | // add new cluster to the new track | |
394 | track->AddTrackParamAtCluster(dummyParam, *newCluster, kTRUE); | |
395 | ||
396 | } | |
397 | ||
398 | // only set Z parameter to avoid error in AddTrackParamAtCluster() | |
399 | // the rest will be recomputed during refit | |
400 | dummyParam.SetZ(newCluster->GetZ()); | |
401 | ||
402 | // add new cluster to the current track | |
403 | currentTrack->AddTrackParamAtCluster(dummyParam, *newCluster, kTRUE); | |
404 | ||
405 | } | |
406 | ||
407 | } | |
408 |