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8d0843c6 | 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 | ||
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
c4ee792d | 19 | /// \class AliMUONVTrackReconstructor |
06ca6d7b | 20 | /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
21 | /// | |
96ebe67e | 22 | /// This class contains as data a pointer to the array of reconstructed tracks |
06ca6d7b | 23 | /// |
24 | /// It contains as methods, among others: | |
25 | /// * EventReconstruct to build the muon tracks | |
26 | /// * EventReconstructTrigger to build the trigger tracks | |
96ebe67e | 27 | /// * ValidateTracksWithTrigger to match tracker/trigger tracks |
06ca6d7b | 28 | /// |
96ebe67e | 29 | /// Several options and adjustable parameters are available for both KALMAN and ORIGINAL |
30 | /// tracking algorithms. They can be changed by using: | |
31 | /// AliMUONRecoParam *muonRecoParam = AliMUONRecoParam::GetLow(High)FluxParam(); | |
32 | /// muonRecoParam->Set...(); // see methods in AliMUONRecoParam.h for details | |
33 | /// AliMUONReconstructor::SetRecoParam(muonRecoParam); | |
34 | /// | |
35 | /// Main parameters and options are: | |
dfb547bf | 36 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be |
37 | /// attached to the track candidate and to select good tracks. | |
019df241 | 38 | /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates |
39 | /// are made assuming linear propagation between stations 4 and 5. | |
dfb547bf | 40 | /// - *fgkTrackAllTracks* : according to the value of this flag, in case that several |
41 | /// new clusters pass the quality cut, either we consider all the possibilities | |
42 | /// (duplicating tracks) or we attach only the best cluster. | |
43 | /// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks | |
44 | /// lost during the tracking by removing the worst of the 2 clusters attached in the | |
45 | /// previous station. | |
46 | /// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality | |
47 | /// of the tracks at the end of the tracking by removing clusters that do not pass | |
3304fa09 | 48 | /// new quality cut (the track is removed is it does not contain enough cluster anymore). |
49 | /// - *fgkComplementTracks* : if this flag is set to 'true', we try to improve the quality | |
50 | /// of the tracks at the end of the tracking by adding potentially missing clusters | |
51 | /// (we may have 2 clusters in the same chamber because of the overlapping of detection | |
52 | /// elements, which is not handle by the tracking algorithm). | |
dfb547bf | 53 | /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the |
54 | /// quality of the tracks. | |
55 | /// | |
c4ee792d | 56 | /// \author Philippe Pillot |
3d1463c8 | 57 | //----------------------------------------------------------------------------- |
8d0843c6 | 58 | |
8d0843c6 | 59 | #include "AliMUONVTrackReconstructor.h" |
7ec3b9cf | 60 | |
8d0843c6 | 61 | #include "AliMUONConstants.h" |
208f139e | 62 | #include "AliMUONObjectPair.h" |
8d0843c6 | 63 | #include "AliMUONTriggerTrack.h" |
e1a10d41 | 64 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 65 | #include "AliMUONLocalTrigger.h" |
66 | #include "AliMUONGlobalTrigger.h" | |
8d0843c6 | 67 | #include "AliMUONTrack.h" |
37827b29 | 68 | #include "AliMUONTrackParam.h" |
69 | #include "AliMUONTrackExtrap.h" | |
7771752e | 70 | #include "AliMUONTrackHitPattern.h" |
7ec3b9cf | 71 | #include "AliMUONVTrackStore.h" |
72 | #include "AliMUONVClusterStore.h" | |
2060b217 | 73 | #include "AliMUONVCluster.h" |
1fef78c8 | 74 | #include "AliMUONVClusterServer.h" |
7ec3b9cf | 75 | #include "AliMUONVTriggerStore.h" |
76 | #include "AliMUONVTriggerTrackStore.h" | |
ea94c18b | 77 | #include "AliMpDEManager.h" |
1fef78c8 | 78 | #include "AliMpArea.h" |
ea94c18b | 79 | |
80 | #include "AliLog.h" | |
b709ac13 | 81 | #include "AliCodeTimer.h" |
ea94c18b | 82 | #include "AliTracker.h" |
8d0843c6 | 83 | |
4889d34c | 84 | #include <TClonesArray.h> |
85 | #include <TMath.h> | |
ea94c18b | 86 | #include <TMatrixD.h> |
1fef78c8 | 87 | #include <TVector2.h> |
ea94c18b | 88 | |
89 | #include <Riostream.h> | |
4889d34c | 90 | |
78649106 | 91 | /// \cond CLASSIMP |
8d0843c6 | 92 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 93 | /// \endcond |
8d0843c6 | 94 | |
ea94c18b | 95 | //__________________________________________________________________________ |
1fef78c8 | 96 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(AliMUONVClusterServer& clusterServer) |
8d0843c6 | 97 | : TObject(), |
8d0843c6 | 98 | fRecTracksPtr(0x0), |
1fef78c8 | 99 | fNRecTracks(0), |
100 | fClusterServer(clusterServer) | |
8d0843c6 | 101 | { |
102 | /// Constructor for class AliMUONVTrackReconstructor | |
ea94c18b | 103 | |
104 | // Memory allocation for the TClonesArray of reconstructed tracks | |
96ebe67e | 105 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 100); |
7ec3b9cf | 106 | |
208f139e | 107 | // set the magnetic field for track extrapolations |
8d0843c6 | 108 | const AliMagF* kField = AliTracker::GetFieldMap(); |
109 | if (!kField) AliFatal("No field available"); | |
37827b29 | 110 | AliMUONTrackExtrap::SetField(kField); |
8d0843c6 | 111 | } |
112 | ||
113 | //__________________________________________________________________________ | |
ea94c18b | 114 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 115 | { |
116 | /// Destructor for class AliMUONVTrackReconstructor | |
ea94c18b | 117 | delete fRecTracksPtr; |
8d0843c6 | 118 | } |
119 | ||
ea94c18b | 120 | //__________________________________________________________________________ |
121 | void AliMUONVTrackReconstructor::ResetTracks() | |
122 | { | |
123 | /// To reset the TClonesArray of reconstructed tracks | |
124 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
125 | fNRecTracks = 0; | |
126 | return; | |
127 | } | |
128 | ||
129 | //__________________________________________________________________________ | |
1fef78c8 | 130 | void AliMUONVTrackReconstructor::EventReconstruct(AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) |
ea94c18b | 131 | { |
132 | /// To reconstruct one event | |
133 | AliDebug(1,""); | |
b709ac13 | 134 | AliCodeTimerAuto(""); |
ea94c18b | 135 | |
96ebe67e | 136 | // Reset array of tracks |
ea94c18b | 137 | ResetTracks(); |
2060b217 | 138 | |
ea94c18b | 139 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 |
96ebe67e | 140 | MakeTrackCandidates(clusterStore); |
141 | ||
142 | // Stop tracking if no candidate found | |
ea94c18b | 143 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
96ebe67e | 144 | |
ea94c18b | 145 | // Follow tracks in stations(1..) 3, 2 and 1 |
96ebe67e | 146 | FollowTracks(clusterStore); |
147 | ||
b709ac13 | 148 | // Complement the reconstructed tracks |
96ebe67e | 149 | if (AliMUONReconstructor::GetRecoParam()->ComplementTracks()) ComplementTracks(clusterStore); |
150 | ||
ea94c18b | 151 | // Improve the reconstructed tracks |
3304fa09 | 152 | if (AliMUONReconstructor::GetRecoParam()->ImproveTracks()) ImproveTracks(); |
96ebe67e | 153 | |
ea94c18b | 154 | // Remove double tracks |
155 | RemoveDoubleTracks(); | |
96ebe67e | 156 | |
ea94c18b | 157 | // Fill AliMUONTrack data members |
158 | Finalize(); | |
96ebe67e | 159 | |
160 | // Add tracks to MUON data container | |
161 | for (Int_t i=0; i<fNRecTracks; ++i) | |
162 | { | |
163 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
164 | trackStore.Add(*track); | |
165 | } | |
ea94c18b | 166 | } |
167 | ||
8d0843c6 | 168 | //__________________________________________________________________________ |
96ebe67e | 169 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(const AliMUONVClusterStore& clusterStore, Int_t station) |
8d0843c6 | 170 | { |
96ebe67e | 171 | /// To make the list of segments in station(0..) "Station" from the list of clusters to be reconstructed. |
208f139e | 172 | /// Return a new TClonesArray of segments. |
173 | /// It is the responsibility of the user to delete it afterward. | |
96ebe67e | 174 | AliDebug(1,Form("Enter MakeSegmentsPerStation (1..) %d",station+1)); |
208f139e | 175 | |
96ebe67e | 176 | AliMUONVCluster *cluster1, *cluster2; |
208f139e | 177 | AliMUONObjectPair *segment; |
22ccc301 | 178 | Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning |
208f139e | 179 | Int_t ch1 = 2 * station; |
8d0843c6 | 180 | Int_t ch2 = ch1 + 1; |
7ec3b9cf | 181 | |
96ebe67e | 182 | // Create iterators to loop over clusters in both chambers |
183 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
184 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
185 | ||
208f139e | 186 | // list of segments |
96ebe67e | 187 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100); |
7ec3b9cf | 188 | segments->SetOwner(kTRUE); |
189 | ||
96ebe67e | 190 | // Loop over clusters in the first chamber of the station |
191 | while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
192 | ||
193 | // reset cluster iterator of chamber 2 | |
194 | nextInCh2.Reset(); | |
195 | ||
196 | // Loop over clusters in the second chamber of the station | |
197 | while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
198 | ||
199 | // bending slope | |
200 | bendingSlope = (cluster1->GetY() - cluster2->GetY()) / (cluster1->GetZ() - cluster2->GetZ()); | |
201 | ||
202 | // impact parameter | |
203 | impactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope; | |
204 | ||
205 | // absolute value of bending momentum | |
206 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam)); | |
207 | ||
22ccc301 | 208 | // check for bending momentum within tolerances |
3304fa09 | 209 | if ((bendingMomentum < AliMUONReconstructor::GetRecoParam()->GetMaxBendingMomentum()) && |
96ebe67e | 210 | (bendingMomentum > AliMUONReconstructor::GetRecoParam()->GetMinBendingMomentum())) { |
211 | ||
212 | // make new segment | |
213 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE); | |
214 | ||
215 | // Printout for debug | |
216 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
7ec3b9cf | 217 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; |
218 | segment->Dump(); | |
96ebe67e | 219 | cout << "Cluster in first chamber" << endl; |
220 | cluster1->Print(); | |
221 | cout << "Cluster in second chamber" << endl; | |
222 | cluster2->Print(); | |
7ec3b9cf | 223 | } |
96ebe67e | 224 | |
8d0843c6 | 225 | } |
96ebe67e | 226 | |
227 | } | |
228 | ||
229 | } | |
230 | ||
231 | // Printout for debug | |
232 | AliDebug(1,Form("Station: %d NSegments: %d ", station+1, segments->GetEntriesFast())); | |
233 | ||
208f139e | 234 | return segments; |
8d0843c6 | 235 | } |
236 | ||
ea94c18b | 237 | //__________________________________________________________________________ |
238 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
239 | { | |
240 | /// To remove identical tracks: | |
96ebe67e | 241 | /// Tracks are considered identical if they have all their clusters in common. |
242 | /// One keeps the track with the larger number of clusters if need be | |
ea94c18b | 243 | AliMUONTrack *track1, *track2, *trackToRemove; |
96ebe67e | 244 | Int_t clustersInCommon, nClusters1, nClusters2; |
ea94c18b | 245 | Bool_t removedTrack1; |
246 | // Loop over first track of the pair | |
247 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
248 | while (track1) { | |
249 | removedTrack1 = kFALSE; | |
96ebe67e | 250 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 251 | // Loop over second track of the pair |
252 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
253 | while (track2) { | |
96ebe67e | 254 | nClusters2 = track2->GetNClusters(); |
255 | // number of clusters in common between two tracks | |
256 | clustersInCommon = track1->ClustersInCommon(track2); | |
ea94c18b | 257 | // check for identical tracks |
96ebe67e | 258 | if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) { |
ea94c18b | 259 | // decide which track to remove |
96ebe67e | 260 | if (nClusters2 > nClusters1) { |
ea94c18b | 261 | // remove track1 and continue the first loop with the track next to track1 |
262 | trackToRemove = track1; | |
263 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
264 | fRecTracksPtr->Remove(trackToRemove); | |
265 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
266 | fNRecTracks--; | |
267 | removedTrack1 = kTRUE; | |
268 | break; | |
269 | } else { | |
270 | // remove track2 and continue the second loop with the track next to track2 | |
271 | trackToRemove = track2; | |
272 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
273 | fRecTracksPtr->Remove(trackToRemove); | |
274 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
275 | fNRecTracks--; | |
276 | } | |
277 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
278 | } // track2 | |
279 | if (removedTrack1) continue; | |
280 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
281 | } // track1 | |
282 | return; | |
283 | } | |
284 | ||
285 | //__________________________________________________________________________ | |
286 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
287 | { | |
288 | /// To remove double tracks: | |
96ebe67e | 289 | /// Tracks are considered identical if more than half of the clusters of the track |
290 | /// which has the smaller number of clusters are in common with the other track. | |
291 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
ea94c18b | 292 | /// or, if these numbers are equal, the track with the minimum chi2. |
293 | AliMUONTrack *track1, *track2, *trackToRemove; | |
96ebe67e | 294 | Int_t clustersInCommon, nClusters1, nClusters2; |
ea94c18b | 295 | Bool_t removedTrack1; |
296 | // Loop over first track of the pair | |
297 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
298 | while (track1) { | |
299 | removedTrack1 = kFALSE; | |
96ebe67e | 300 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 301 | // Loop over second track of the pair |
302 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
303 | while (track2) { | |
96ebe67e | 304 | nClusters2 = track2->GetNClusters(); |
305 | // number of clusters in common between two tracks | |
306 | clustersInCommon = track1->ClustersInCommon(track2); | |
ea94c18b | 307 | // check for identical tracks |
96ebe67e | 308 | if (((nClusters1 < nClusters2) && (2 * clustersInCommon > nClusters1)) || (2 * clustersInCommon > nClusters2)) { |
ea94c18b | 309 | // decide which track to remove |
96ebe67e | 310 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { |
ea94c18b | 311 | // remove track2 and continue the second loop with the track next to track2 |
312 | trackToRemove = track2; | |
313 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
314 | fRecTracksPtr->Remove(trackToRemove); | |
315 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
316 | fNRecTracks--; | |
317 | } else { | |
318 | // else remove track1 and continue the first loop with the track next to track1 | |
319 | trackToRemove = track1; | |
320 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
321 | fRecTracksPtr->Remove(trackToRemove); | |
322 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
323 | fNRecTracks--; | |
324 | removedTrack1 = kTRUE; | |
325 | break; | |
326 | } | |
327 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
328 | } // track2 | |
329 | if (removedTrack1) continue; | |
330 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
331 | } // track1 | |
332 | return; | |
333 | } | |
334 | ||
1fef78c8 | 335 | //__________________________________________________________________________ |
336 | void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam, | |
337 | AliMUONVClusterStore& clusterStore, Int_t station) | |
338 | { | |
339 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
340 | /// in the 2 chambers of the given station | |
341 | ||
342 | // maximum shift of the searching area due to distance between detection elements and the track slope | |
343 | static const Double_t kgMaxShift = 2.; // 2 cm | |
344 | ||
345 | // extrapolate track parameters to the second chamber of the station | |
346 | AliMUONTrackParam extrapTrackParam(trackParam); | |
347 | AliMUONTrackExtrap::ExtrapToZ(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(2*station+1)); | |
348 | ||
349 | // build the searching area | |
350 | TVector2 position(extrapTrackParam.GetNonBendingCoor(), extrapTrackParam.GetBendingCoor()); | |
351 | TVector2 dimensions(AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() + kgMaxShift, | |
352 | AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack() + kgMaxShift); | |
353 | AliMpArea area2(position, dimensions); | |
354 | ||
355 | // ask to cluterize in the given area of the given chamber | |
356 | fClusterServer.Clusterize(2*station+1, clusterStore, area2); | |
357 | ||
358 | // extrapolate track parameters to the first chamber of the station | |
359 | AliMUONTrackExtrap::ExtrapToZ(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(2*station)); | |
360 | ||
361 | // build the searching area | |
362 | position.Set(extrapTrackParam.GetNonBendingCoor(), extrapTrackParam.GetBendingCoor()); | |
363 | // dimensions.Set(AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() + kgMaxShift, | |
364 | // AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack() + kgMaxShift); | |
365 | AliMpArea area1(position, dimensions); | |
366 | ||
367 | // ask to cluterize in the given area of the given chamber | |
368 | fClusterServer.Clusterize(2*station, clusterStore, area1); | |
369 | } | |
370 | ||
ea94c18b | 371 | //__________________________________________________________________________ |
96ebe67e | 372 | Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster, |
1fef78c8 | 373 | AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator) |
ea94c18b | 374 | { |
96ebe67e | 375 | /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix): |
ea94c18b | 376 | /// return the corresponding Chi2 |
96ebe67e | 377 | /// return trackParamAtCluster |
ea94c18b | 378 | |
96ebe67e | 379 | // extrapolate track parameters and covariances at the z position of the tested cluster |
380 | trackParamAtCluster = trackParam; | |
381 | AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator); | |
ea94c18b | 382 | |
96ebe67e | 383 | // set pointer to cluster into trackParamAtCluster |
384 | trackParamAtCluster.SetClusterPtr(cluster); | |
ea94c18b | 385 | |
96ebe67e | 386 | // Set differences between trackParam and cluster in the bending and non bending directions |
387 | Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor(); | |
388 | Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor(); | |
ea94c18b | 389 | |
019df241 | 390 | // Calculate errors and covariances |
96ebe67e | 391 | const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances(); |
392 | Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2(); | |
393 | Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2(); | |
019df241 | 394 | |
395 | // Compute chi2 | |
96ebe67e | 396 | return dX * dX / sigmaX2 + dY * dY / sigmaY2; |
019df241 | 397 | |
398 | } | |
399 | ||
400 | //__________________________________________________________________________ | |
96ebe67e | 401 | Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster) |
019df241 | 402 | { |
96ebe67e | 403 | /// Test the compatibility between the track and the cluster within a wide fix window |
019df241 | 404 | /// assuming linear propagation of the track: |
405 | /// return kTRUE if they are compatibles | |
406 | ||
96ebe67e | 407 | Double_t dZ = cluster->GetZ() - trackParam.GetZ(); |
408 | Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
409 | Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
019df241 | 410 | |
3304fa09 | 411 | if (TMath::Abs(dX) > AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() || |
412 | TMath::Abs(dY) > AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack()) return kFALSE; | |
019df241 | 413 | |
414 | return kTRUE; | |
415 | ||
416 | } | |
417 | ||
418 | //__________________________________________________________________________ | |
96ebe67e | 419 | Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2, |
420 | AliMUONTrackParam &trackParamAtCluster2) | |
019df241 | 421 | { |
96ebe67e | 422 | /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix) |
423 | /// assuming linear propagation between the two clusters: | |
424 | /// return the corresponding Chi2 accounting for covariances between the 2 clusters | |
425 | /// return trackParamAtCluster2 | |
019df241 | 426 | |
96ebe67e | 427 | // extrapolate linearly track parameters and covariances at the z position of the second cluster |
428 | trackParamAtCluster2 = trackParamAtCluster1; | |
429 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtCluster2, cluster2->GetZ()); | |
019df241 | 430 | |
96ebe67e | 431 | // set pointer to cluster2 into trackParamAtCluster2 |
432 | trackParamAtCluster2.SetClusterPtr(cluster2); | |
019df241 | 433 | |
96ebe67e | 434 | // Set differences between track and clusters in the bending and non bending directions |
435 | AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr(); | |
436 | Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor(); | |
437 | Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor(); | |
438 | Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor(); | |
439 | Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor(); | |
019df241 | 440 | |
441 | // Calculate errors and covariances | |
96ebe67e | 442 | const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances(); |
443 | const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances(); | |
444 | Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ(); | |
445 | Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2(); | |
446 | Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2(); | |
019df241 | 447 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); |
96ebe67e | 448 | Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2(); |
449 | Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2(); | |
019df241 | 450 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); |
451 | ||
452 | // Compute chi2 | |
453 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
454 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
455 | if (detX == 0. || detY == 0.) return 1.e10; | |
456 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX | |
457 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
458 | ||
459 | } | |
460 | ||
461 | //__________________________________________________________________________ | |
96ebe67e | 462 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
463 | Int_t nextStation) | |
019df241 | 464 | { |
96ebe67e | 465 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s) |
019df241 | 466 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: |
467 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
468 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
469 | /// Remove the obsolete "trackCandidate" at the end. | |
96ebe67e | 470 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. |
471 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
019df241 | 472 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); |
473 | ||
474 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
475 | // - nextStation == station(1...) 5 => forward propagation | |
476 | // - nextStation < station(1...) 5 => backward propagation | |
477 | Int_t ch1, ch2; | |
478 | if (nextStation==4) { | |
479 | ch1 = 2*nextStation+1; | |
480 | ch2 = 2*nextStation; | |
ea94c18b | 481 | } else { |
019df241 | 482 | ch1 = 2*nextStation; |
483 | ch2 = 2*nextStation+1; | |
ea94c18b | 484 | } |
485 | ||
96ebe67e | 486 | Double_t chi2WithOneCluster = 1.e10; |
487 | Double_t chi2WithTwoClusters = 1.e10; | |
488 | Double_t maxChi2WithOneCluster = 2. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() * | |
489 | AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
490 | Double_t maxChi2WithTwoClusters = 4. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() * | |
491 | AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2 | |
492 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; | |
493 | Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters; | |
494 | Bool_t foundOneCluster = kFALSE; | |
495 | Bool_t foundTwoClusters = kFALSE; | |
019df241 | 496 | AliMUONTrack *newTrack = 0x0; |
96ebe67e | 497 | AliMUONVCluster *clusterCh1, *clusterCh2; |
498 | AliMUONTrackParam extrapTrackParamAtCluster1; | |
499 | AliMUONTrackParam extrapTrackParamAtCluster2; | |
500 | AliMUONTrackParam bestTrackParamAtCluster1; | |
501 | AliMUONTrackParam bestTrackParamAtCluster2; | |
502 | ||
503 | Int_t nClusters = clusterStore.GetSize(); | |
504 | Bool_t *clusterCh1Used = new Bool_t[nClusters]; | |
505 | for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE; | |
506 | Int_t iCluster1; | |
019df241 | 507 | |
508 | // Get track parameters | |
96ebe67e | 509 | AliMUONTrackParam trackParam(*(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First()); |
019df241 | 510 | |
511 | // Add MCS effect | |
512 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
513 | ||
514 | // Printout for debuging | |
515 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 516 | cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl; |
019df241 | 517 | } |
518 | ||
96ebe67e | 519 | // Create iterators to loop over clusters in both chambers |
520 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
521 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
522 | ||
523 | // look for candidates in chamber 2 | |
524 | while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
019df241 | 525 | |
96ebe67e | 526 | // try to add the current cluster fast |
527 | if (!TryOneClusterFast(trackParam, clusterCh2)) continue; | |
019df241 | 528 | |
96ebe67e | 529 | // try to add the current cluster accuratly |
530 | extrapTrackParamAtCluster2 = trackParam; | |
531 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster2, clusterCh2->GetZ()); | |
532 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2); | |
019df241 | 533 | |
96ebe67e | 534 | // if good chi2 then try to attach a cluster in the other chamber too |
535 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
536 | Bool_t foundSecondCluster = kFALSE; | |
019df241 | 537 | |
538 | // Printout for debuging | |
539 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 540 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1 |
541 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
542 | cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl; | |
019df241 | 543 | } |
544 | ||
545 | // add MCS effect | |
96ebe67e | 546 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(),1.); |
019df241 | 547 | |
96ebe67e | 548 | // reset cluster iterator of chamber 1 |
549 | nextInCh1.Reset(); | |
550 | iCluster1 = -1; | |
551 | ||
552 | // look for second candidates in chamber 1 | |
553 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
554 | iCluster1++; | |
019df241 | 555 | |
96ebe67e | 556 | // try to add the current cluster fast |
557 | if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue; | |
019df241 | 558 | |
96ebe67e | 559 | // try to add the current cluster in addition to the one found in the previous chamber |
560 | chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1); | |
019df241 | 561 | |
96ebe67e | 562 | // if good chi2 then consider to add the 2 clusters to the "trackCandidate" |
563 | if (chi2WithTwoClusters < maxChi2WithTwoClusters) { | |
564 | foundSecondCluster = kTRUE; | |
565 | foundTwoClusters = kTRUE; | |
019df241 | 566 | |
567 | // Printout for debuging | |
568 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 569 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
570 | << " (Chi2 = " << chi2WithTwoClusters << ")" << endl; | |
019df241 | 571 | } |
572 | ||
3304fa09 | 573 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 574 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters |
019df241 | 575 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 576 | extrapTrackParamAtCluster1.SetRemovable(kTRUE); |
577 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
578 | extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
579 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
580 | newTrack->GetTrackParamAtCluster()->Sort(); | |
019df241 | 581 | fNRecTracks++; |
582 | ||
96ebe67e | 583 | // Tag clusterCh1 as used |
584 | clusterCh1Used[iCluster1] = kTRUE; | |
019df241 | 585 | |
586 | // Printout for debuging | |
587 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 588 | cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 589 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
590 | } | |
591 | ||
96ebe67e | 592 | } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) { |
593 | // keep track of the best couple of clusters | |
594 | bestChi2WithTwoClusters = chi2WithTwoClusters; | |
595 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
596 | bestTrackParamAtCluster2 = extrapTrackParamAtCluster2; | |
019df241 | 597 | } |
598 | ||
599 | } | |
600 | ||
601 | } | |
602 | ||
96ebe67e | 603 | // if no cluster found in chamber1 then consider to add clusterCh2 only |
604 | if (!foundSecondCluster) { | |
605 | foundOneCluster = kTRUE; | |
019df241 | 606 | |
3304fa09 | 607 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 608 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 609 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 610 | extrapTrackParamAtCluster2.SetRemovable(kFALSE); |
611 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
612 | newTrack->GetTrackParamAtCluster()->Sort(); | |
019df241 | 613 | fNRecTracks++; |
614 | ||
615 | // Printout for debuging | |
616 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 617 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl; |
019df241 | 618 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
619 | } | |
620 | ||
96ebe67e | 621 | } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) { |
622 | // keep track of the best cluster except if a couple of clusters has already been found | |
623 | bestChi2WithOneCluster = chi2WithOneCluster; | |
624 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster2; | |
019df241 | 625 | } |
626 | ||
627 | } | |
628 | ||
629 | } | |
630 | ||
631 | } | |
632 | ||
633 | // look for candidates in chamber 1 not already attached to a track | |
96ebe67e | 634 | // if we want to keep all possible tracks or if no good couple of clusters has been found |
635 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks() || !foundTwoClusters) { | |
019df241 | 636 | |
637 | // Printout for debuging | |
638 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 639 | cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 640 | } |
641 | ||
642 | //Extrapolate trackCandidate to chamber "ch2" | |
643 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); | |
644 | ||
645 | // add MCS effect for next step | |
646 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
647 | ||
96ebe67e | 648 | // reset cluster iterator of chamber 1 |
649 | nextInCh1.Reset(); | |
650 | iCluster1 = -1; | |
651 | ||
652 | // look for second candidates in chamber 1 | |
653 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
654 | iCluster1++; | |
019df241 | 655 | |
96ebe67e | 656 | if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used |
019df241 | 657 | |
96ebe67e | 658 | // try to add the current cluster fast |
659 | if (!TryOneClusterFast(trackParam, clusterCh1)) continue; | |
019df241 | 660 | |
96ebe67e | 661 | // try to add the current cluster accuratly |
662 | extrapTrackParamAtCluster1 = trackParam; | |
663 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster1, clusterCh1->GetZ()); | |
664 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1); | |
019df241 | 665 | |
96ebe67e | 666 | // if good chi2 then consider to add clusterCh1 |
667 | // We do not try to attach a cluster in the other chamber too since it has already been done above | |
668 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
669 | foundOneCluster = kTRUE; | |
019df241 | 670 | |
671 | // Printout for debuging | |
672 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 673 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
674 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
019df241 | 675 | } |
676 | ||
3304fa09 | 677 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 678 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 679 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 680 | extrapTrackParamAtCluster1.SetRemovable(kFALSE); |
681 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
682 | newTrack->GetTrackParamAtCluster()->Sort(); | |
019df241 | 683 | fNRecTracks++; |
684 | ||
685 | // Printout for debuging | |
686 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 687 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 688 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
689 | } | |
690 | ||
96ebe67e | 691 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { |
692 | // keep track of the best cluster except if a couple of clusters has already been found | |
693 | bestChi2WithOneCluster = chi2WithOneCluster; | |
694 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
019df241 | 695 | } |
696 | ||
697 | } | |
698 | ||
699 | } | |
700 | ||
701 | } | |
702 | ||
703 | // fill out the best track if required else clean up the fRecTracksPtr array | |
3304fa09 | 704 | if (!AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 705 | if (foundTwoClusters) { |
706 | bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
707 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
708 | bestTrackParamAtCluster2.SetRemovable(kTRUE); | |
709 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr())); | |
710 | trackCandidate.GetTrackParamAtCluster()->Sort(); | |
019df241 | 711 | |
712 | // Printout for debuging | |
713 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 714 | cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 715 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
716 | } | |
717 | ||
96ebe67e | 718 | } else if (foundOneCluster) { |
719 | bestTrackParamAtCluster1.SetRemovable(kFALSE); | |
720 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
721 | trackCandidate.GetTrackParamAtCluster()->Sort(); | |
019df241 | 722 | |
723 | // Printout for debuging | |
724 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 725 | cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl; |
019df241 | 726 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
727 | } | |
728 | ||
dd230855 | 729 | } else { |
96ebe67e | 730 | delete [] clusterCh1Used; |
dd230855 | 731 | return kFALSE; |
732 | } | |
019df241 | 733 | |
96ebe67e | 734 | } else if (foundOneCluster || foundTwoClusters) { |
019df241 | 735 | |
736 | // remove obsolete track | |
737 | fRecTracksPtr->Remove(&trackCandidate); | |
738 | fNRecTracks--; | |
739 | ||
dd230855 | 740 | } else { |
96ebe67e | 741 | delete [] clusterCh1Used; |
dd230855 | 742 | return kFALSE; |
743 | } | |
ea94c18b | 744 | |
96ebe67e | 745 | delete [] clusterCh1Used; |
019df241 | 746 | return kTRUE; |
ea94c18b | 747 | |
748 | } | |
749 | ||
750 | //__________________________________________________________________________ | |
7ec3b9cf | 751 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
752 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
753 | const AliMUONVTriggerStore& triggerStore, | |
754 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 755 | { |
756 | /// Try to match track from tracking system with trigger track | |
b709ac13 | 757 | AliCodeTimerAuto(""); |
fda59e58 | 758 | |
683cb6c5 | 759 | trackHitPattern.ExecuteValidation(trackStore, triggerTrackStore, triggerStore); |
8d0843c6 | 760 | } |
761 | ||
ea94c18b | 762 | //__________________________________________________________________________ |
763 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
764 | const AliMUONVTriggerStore& triggerStore, | |
765 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 766 | { |
71a2d3aa | 767 | /// To make the trigger tracks from Local Trigger |
7ec3b9cf | 768 | AliDebug(1, ""); |
b709ac13 | 769 | AliCodeTimerAuto(""); |
7ec3b9cf | 770 | |
771 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); | |
e6b25a6e | 772 | |
7ec3b9cf | 773 | UChar_t gloTrigPat = 0; |
e6b25a6e | 774 | |
7ec3b9cf | 775 | if (globalTrigger) |
776 | { | |
777 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 778 | } |
779 | ||
7ec3b9cf | 780 | TIter next(triggerStore.CreateIterator()); |
781 | AliMUONLocalTrigger* locTrg(0x0); | |
8d0843c6 | 782 | |
e6b25a6e | 783 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
784 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
7cf63da6 | 785 | |
7ec3b9cf | 786 | AliMUONTriggerTrack triggerTrack; |
787 | ||
788 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
789 | { | |
790 | Bool_t xTrig=kFALSE; | |
791 | Bool_t yTrig=kFALSE; | |
792 | ||
32ab62c9 | 793 | Int_t localBoardId = locTrg->LoCircuit(); |
7ec3b9cf | 794 | if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 && |
795 | locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X | |
796 | else xTrig=kTRUE; // trigger in X | |
797 | if (locTrg->LoTrigY()==1 && | |
798 | locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y | |
799 | else yTrig = kTRUE; // trigger in Y | |
800 | ||
801 | if (xTrig && yTrig) | |
802 | { // make Trigger Track if trigger in X and Y | |
8b0baca4 | 803 | |
32ab62c9 | 804 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); |
7ec3b9cf | 805 | // need first to convert deviation to [0-30] |
806 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
807 | Int_t deviation = locTrg->LoDev(); | |
808 | Int_t sign = 0; | |
809 | if ( !locTrg->LoSdev() && deviation ) sign=-1; | |
810 | if ( !locTrg->LoSdev() && !deviation ) sign= 0; | |
811 | if ( locTrg->LoSdev() == 1 ) sign=+1; | |
812 | deviation *= sign; | |
813 | deviation += 15; | |
814 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; | |
32ab62c9 | 815 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); |
816 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); | |
7ec3b9cf | 817 | |
818 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(), | |
819 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
820 | ||
821 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
822 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
823 | ||
824 | triggerTrack.SetX11(x11); | |
825 | triggerTrack.SetY11(y11); | |
826 | triggerTrack.SetThetax(thetax); | |
827 | triggerTrack.SetThetay(thetay); | |
828 | triggerTrack.SetGTPattern(gloTrigPat); | |
32ab62c9 | 829 | triggerTrack.SetLoTrgNum(localBoardId); |
7ec3b9cf | 830 | |
831 | triggerTrackStore.Add(triggerTrack); | |
832 | } // board is fired | |
e6b25a6e | 833 | } // end of loop on Local Trigger |
8d0843c6 | 834 | } |
ea94c18b | 835 |