]>
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 | /* $Id$ */ | |
17 | ||
18 | //----------------------------------------------------------------------------- | |
19 | /// \class AliMUONVTrackReconstructor | |
20 | /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) | |
21 | /// | |
22 | /// This class contains as data a pointer to the array of reconstructed tracks | |
23 | /// | |
24 | /// It contains as methods, among others: | |
25 | /// * EventReconstruct to build the muon tracks | |
26 | /// * EventReconstructTrigger to build the trigger tracks | |
27 | /// * ValidateTracksWithTrigger to match tracker/trigger tracks | |
28 | /// | |
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: | |
36 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be | |
37 | /// attached to the track candidate and to select good tracks. | |
38 | /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates | |
39 | /// are made assuming linear propagation between stations 4 and 5. | |
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 | |
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). | |
53 | /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the | |
54 | /// quality of the tracks. | |
55 | /// | |
56 | /// \author Philippe Pillot | |
57 | //----------------------------------------------------------------------------- | |
58 | ||
59 | #include "AliMUONVTrackReconstructor.h" | |
60 | ||
61 | #include "AliMUONConstants.h" | |
62 | #include "AliMUONObjectPair.h" | |
63 | #include "AliMUONTriggerTrack.h" | |
64 | #include "AliMUONTriggerCircuit.h" | |
65 | #include "AliMUONLocalTrigger.h" | |
66 | #include "AliMUONGlobalTrigger.h" | |
67 | #include "AliMUONTrack.h" | |
68 | #include "AliMUONTrackParam.h" | |
69 | #include "AliMUONTrackExtrap.h" | |
70 | #include "AliMUONTrackHitPattern.h" | |
71 | #include "AliMUONVTrackStore.h" | |
72 | #include "AliMUONVClusterStore.h" | |
73 | #include "AliMUONVCluster.h" | |
74 | #include "AliMUONVTriggerStore.h" | |
75 | #include "AliMUONVTriggerTrackStore.h" | |
76 | #include "AliMpDEManager.h" | |
77 | ||
78 | #include "AliLog.h" | |
79 | #include "AliCodeTimer.h" | |
80 | #include "AliTracker.h" | |
81 | ||
82 | #include <TClonesArray.h> | |
83 | #include <TMath.h> | |
84 | #include <TMatrixD.h> | |
85 | ||
86 | #include <Riostream.h> | |
87 | ||
88 | /// \cond CLASSIMP | |
89 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context | |
90 | /// \endcond | |
91 | ||
92 | //__________________________________________________________________________ | |
93 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor() | |
94 | : TObject(), | |
95 | fRecTracksPtr(0x0), | |
96 | fNRecTracks(0) | |
97 | { | |
98 | /// Constructor for class AliMUONVTrackReconstructor | |
99 | ||
100 | // Memory allocation for the TClonesArray of reconstructed tracks | |
101 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 100); | |
102 | ||
103 | // set the magnetic field for track extrapolations | |
104 | const AliMagF* kField = AliTracker::GetFieldMap(); | |
105 | if (!kField) AliFatal("No field available"); | |
106 | AliMUONTrackExtrap::SetField(kField); | |
107 | } | |
108 | ||
109 | //__________________________________________________________________________ | |
110 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() | |
111 | { | |
112 | /// Destructor for class AliMUONVTrackReconstructor | |
113 | delete fRecTracksPtr; | |
114 | } | |
115 | ||
116 | //__________________________________________________________________________ | |
117 | void AliMUONVTrackReconstructor::ResetTracks() | |
118 | { | |
119 | /// To reset the TClonesArray of reconstructed tracks | |
120 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
121 | fNRecTracks = 0; | |
122 | return; | |
123 | } | |
124 | ||
125 | //__________________________________________________________________________ | |
126 | void AliMUONVTrackReconstructor::EventReconstruct(const AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) | |
127 | { | |
128 | /// To reconstruct one event | |
129 | AliDebug(1,""); | |
130 | AliCodeTimerAuto(""); | |
131 | ||
132 | // Reset array of tracks | |
133 | ResetTracks(); | |
134 | ||
135 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
136 | MakeTrackCandidates(clusterStore); | |
137 | ||
138 | // Stop tracking if no candidate found | |
139 | if (fRecTracksPtr->GetEntriesFast() == 0) return; | |
140 | ||
141 | // Follow tracks in stations(1..) 3, 2 and 1 | |
142 | FollowTracks(clusterStore); | |
143 | ||
144 | // Complement the reconstructed tracks | |
145 | if (AliMUONReconstructor::GetRecoParam()->ComplementTracks()) ComplementTracks(clusterStore); | |
146 | ||
147 | // Improve the reconstructed tracks | |
148 | if (AliMUONReconstructor::GetRecoParam()->ImproveTracks()) ImproveTracks(); | |
149 | ||
150 | // Remove double tracks | |
151 | RemoveDoubleTracks(); | |
152 | ||
153 | // Fill AliMUONTrack data members | |
154 | Finalize(); | |
155 | ||
156 | // Add tracks to MUON data container | |
157 | for (Int_t i=0; i<fNRecTracks; ++i) | |
158 | { | |
159 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
160 | trackStore.Add(*track); | |
161 | } | |
162 | } | |
163 | ||
164 | //__________________________________________________________________________ | |
165 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(const AliMUONVClusterStore& clusterStore, Int_t station) | |
166 | { | |
167 | /// To make the list of segments in station(0..) "Station" from the list of clusters to be reconstructed. | |
168 | /// Return a new TClonesArray of segments. | |
169 | /// It is the responsibility of the user to delete it afterward. | |
170 | AliDebug(1,Form("Enter MakeSegmentsPerStation (1..) %d",station+1)); | |
171 | ||
172 | AliMUONVCluster *cluster1, *cluster2; | |
173 | AliMUONObjectPair *segment; | |
174 | Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning | |
175 | Int_t ch1 = 2 * station; | |
176 | Int_t ch2 = ch1 + 1; | |
177 | ||
178 | // Create iterators to loop over clusters in both chambers | |
179 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
180 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
181 | ||
182 | // list of segments | |
183 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100); | |
184 | segments->SetOwner(kTRUE); | |
185 | ||
186 | // Loop over clusters in the first chamber of the station | |
187 | while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
188 | ||
189 | // reset cluster iterator of chamber 2 | |
190 | nextInCh2.Reset(); | |
191 | ||
192 | // Loop over clusters in the second chamber of the station | |
193 | while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
194 | ||
195 | // bending slope | |
196 | bendingSlope = (cluster1->GetY() - cluster2->GetY()) / (cluster1->GetZ() - cluster2->GetZ()); | |
197 | ||
198 | // impact parameter | |
199 | impactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope; | |
200 | ||
201 | // absolute value of bending momentum | |
202 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam)); | |
203 | ||
204 | // check for bending momentum within tolerances | |
205 | if ((bendingMomentum < AliMUONReconstructor::GetRecoParam()->GetMaxBendingMomentum()) && | |
206 | (bendingMomentum > AliMUONReconstructor::GetRecoParam()->GetMinBendingMomentum())) { | |
207 | ||
208 | // make new segment | |
209 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE); | |
210 | ||
211 | // Printout for debug | |
212 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
213 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
214 | segment->Dump(); | |
215 | cout << "Cluster in first chamber" << endl; | |
216 | cluster1->Print(); | |
217 | cout << "Cluster in second chamber" << endl; | |
218 | cluster2->Print(); | |
219 | } | |
220 | ||
221 | } | |
222 | ||
223 | } | |
224 | ||
225 | } | |
226 | ||
227 | // Printout for debug | |
228 | AliDebug(1,Form("Station: %d NSegments: %d ", station+1, segments->GetEntriesFast())); | |
229 | ||
230 | return segments; | |
231 | } | |
232 | ||
233 | //__________________________________________________________________________ | |
234 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
235 | { | |
236 | /// To remove identical tracks: | |
237 | /// Tracks are considered identical if they have all their clusters in common. | |
238 | /// One keeps the track with the larger number of clusters if need be | |
239 | AliMUONTrack *track1, *track2, *trackToRemove; | |
240 | Int_t clustersInCommon, nClusters1, nClusters2; | |
241 | Bool_t removedTrack1; | |
242 | // Loop over first track of the pair | |
243 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
244 | while (track1) { | |
245 | removedTrack1 = kFALSE; | |
246 | nClusters1 = track1->GetNClusters(); | |
247 | // Loop over second track of the pair | |
248 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
249 | while (track2) { | |
250 | nClusters2 = track2->GetNClusters(); | |
251 | // number of clusters in common between two tracks | |
252 | clustersInCommon = track1->ClustersInCommon(track2); | |
253 | // check for identical tracks | |
254 | if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) { | |
255 | // decide which track to remove | |
256 | if (nClusters2 > nClusters1) { | |
257 | // remove track1 and continue the first loop with the track next to track1 | |
258 | trackToRemove = track1; | |
259 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
260 | fRecTracksPtr->Remove(trackToRemove); | |
261 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
262 | fNRecTracks--; | |
263 | removedTrack1 = kTRUE; | |
264 | break; | |
265 | } else { | |
266 | // remove track2 and continue the second loop with the track next to track2 | |
267 | trackToRemove = track2; | |
268 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
269 | fRecTracksPtr->Remove(trackToRemove); | |
270 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
271 | fNRecTracks--; | |
272 | } | |
273 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
274 | } // track2 | |
275 | if (removedTrack1) continue; | |
276 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
277 | } // track1 | |
278 | return; | |
279 | } | |
280 | ||
281 | //__________________________________________________________________________ | |
282 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
283 | { | |
284 | /// To remove double tracks: | |
285 | /// Tracks are considered identical if more than half of the clusters of the track | |
286 | /// which has the smaller number of clusters are in common with the other track. | |
287 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
288 | /// or, if these numbers are equal, the track with the minimum chi2. | |
289 | AliMUONTrack *track1, *track2, *trackToRemove; | |
290 | Int_t clustersInCommon, nClusters1, nClusters2; | |
291 | Bool_t removedTrack1; | |
292 | // Loop over first track of the pair | |
293 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
294 | while (track1) { | |
295 | removedTrack1 = kFALSE; | |
296 | nClusters1 = track1->GetNClusters(); | |
297 | // Loop over second track of the pair | |
298 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
299 | while (track2) { | |
300 | nClusters2 = track2->GetNClusters(); | |
301 | // number of clusters in common between two tracks | |
302 | clustersInCommon = track1->ClustersInCommon(track2); | |
303 | // check for identical tracks | |
304 | if (((nClusters1 < nClusters2) && (2 * clustersInCommon > nClusters1)) || (2 * clustersInCommon > nClusters2)) { | |
305 | // decide which track to remove | |
306 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { | |
307 | // remove track2 and continue the second loop with the track next to track2 | |
308 | trackToRemove = track2; | |
309 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
310 | fRecTracksPtr->Remove(trackToRemove); | |
311 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
312 | fNRecTracks--; | |
313 | } else { | |
314 | // else remove track1 and continue the first loop with the track next to track1 | |
315 | trackToRemove = track1; | |
316 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
317 | fRecTracksPtr->Remove(trackToRemove); | |
318 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
319 | fNRecTracks--; | |
320 | removedTrack1 = kTRUE; | |
321 | break; | |
322 | } | |
323 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
324 | } // track2 | |
325 | if (removedTrack1) continue; | |
326 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
327 | } // track1 | |
328 | return; | |
329 | } | |
330 | ||
331 | //__________________________________________________________________________ | |
332 | Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster, | |
333 | AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator) | |
334 | { | |
335 | /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix): | |
336 | /// return the corresponding Chi2 | |
337 | /// return trackParamAtCluster | |
338 | ||
339 | // extrapolate track parameters and covariances at the z position of the tested cluster | |
340 | trackParamAtCluster = trackParam; | |
341 | AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator); | |
342 | ||
343 | // set pointer to cluster into trackParamAtCluster | |
344 | trackParamAtCluster.SetClusterPtr(cluster); | |
345 | ||
346 | // Set differences between trackParam and cluster in the bending and non bending directions | |
347 | Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor(); | |
348 | Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor(); | |
349 | ||
350 | // Calculate errors and covariances | |
351 | const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances(); | |
352 | Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2(); | |
353 | Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2(); | |
354 | ||
355 | // Compute chi2 | |
356 | return dX * dX / sigmaX2 + dY * dY / sigmaY2; | |
357 | ||
358 | } | |
359 | ||
360 | //__________________________________________________________________________ | |
361 | Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster) | |
362 | { | |
363 | /// Test the compatibility between the track and the cluster within a wide fix window | |
364 | /// assuming linear propagation of the track: | |
365 | /// return kTRUE if they are compatibles | |
366 | ||
367 | Double_t dZ = cluster->GetZ() - trackParam.GetZ(); | |
368 | Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
369 | Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
370 | ||
371 | if (TMath::Abs(dX) > AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() || | |
372 | TMath::Abs(dY) > AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack()) return kFALSE; | |
373 | ||
374 | return kTRUE; | |
375 | ||
376 | } | |
377 | ||
378 | //__________________________________________________________________________ | |
379 | Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2, | |
380 | AliMUONTrackParam &trackParamAtCluster2) | |
381 | { | |
382 | /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix) | |
383 | /// assuming linear propagation between the two clusters: | |
384 | /// return the corresponding Chi2 accounting for covariances between the 2 clusters | |
385 | /// return trackParamAtCluster2 | |
386 | ||
387 | // extrapolate linearly track parameters and covariances at the z position of the second cluster | |
388 | trackParamAtCluster2 = trackParamAtCluster1; | |
389 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtCluster2, cluster2->GetZ()); | |
390 | ||
391 | // set pointer to cluster2 into trackParamAtCluster2 | |
392 | trackParamAtCluster2.SetClusterPtr(cluster2); | |
393 | ||
394 | // Set differences between track and clusters in the bending and non bending directions | |
395 | AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr(); | |
396 | Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor(); | |
397 | Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor(); | |
398 | Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor(); | |
399 | Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor(); | |
400 | ||
401 | // Calculate errors and covariances | |
402 | const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances(); | |
403 | const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances(); | |
404 | Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ(); | |
405 | Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2(); | |
406 | Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2(); | |
407 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); | |
408 | Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2(); | |
409 | Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2(); | |
410 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); | |
411 | ||
412 | // Compute chi2 | |
413 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
414 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
415 | if (detX == 0. || detY == 0.) return 1.e10; | |
416 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX | |
417 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
418 | ||
419 | } | |
420 | ||
421 | //__________________________________________________________________________ | |
422 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, | |
423 | Int_t nextStation) | |
424 | { | |
425 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s) | |
426 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: | |
427 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
428 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
429 | /// Remove the obsolete "trackCandidate" at the end. | |
430 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. | |
431 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
432 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); | |
433 | ||
434 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
435 | // - nextStation == station(1...) 5 => forward propagation | |
436 | // - nextStation < station(1...) 5 => backward propagation | |
437 | Int_t ch1, ch2; | |
438 | if (nextStation==4) { | |
439 | ch1 = 2*nextStation+1; | |
440 | ch2 = 2*nextStation; | |
441 | } else { | |
442 | ch1 = 2*nextStation; | |
443 | ch2 = 2*nextStation+1; | |
444 | } | |
445 | ||
446 | Double_t chi2WithOneCluster = 1.e10; | |
447 | Double_t chi2WithTwoClusters = 1.e10; | |
448 | Double_t maxChi2WithOneCluster = 2. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() * | |
449 | AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
450 | Double_t maxChi2WithTwoClusters = 4. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() * | |
451 | AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2 | |
452 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; | |
453 | Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters; | |
454 | Bool_t foundOneCluster = kFALSE; | |
455 | Bool_t foundTwoClusters = kFALSE; | |
456 | AliMUONTrack *newTrack = 0x0; | |
457 | AliMUONVCluster *clusterCh1, *clusterCh2; | |
458 | AliMUONTrackParam extrapTrackParamAtCluster1; | |
459 | AliMUONTrackParam extrapTrackParamAtCluster2; | |
460 | AliMUONTrackParam bestTrackParamAtCluster1; | |
461 | AliMUONTrackParam bestTrackParamAtCluster2; | |
462 | ||
463 | Int_t nClusters = clusterStore.GetSize(); | |
464 | Bool_t *clusterCh1Used = new Bool_t[nClusters]; | |
465 | for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE; | |
466 | Int_t iCluster1; | |
467 | ||
468 | // Get track parameters | |
469 | AliMUONTrackParam trackParam(*(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First()); | |
470 | ||
471 | // Add MCS effect | |
472 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
473 | ||
474 | // Printout for debuging | |
475 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
476 | cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl; | |
477 | } | |
478 | ||
479 | // Create iterators to loop over clusters in both chambers | |
480 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
481 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
482 | ||
483 | // look for candidates in chamber 2 | |
484 | while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
485 | ||
486 | // try to add the current cluster fast | |
487 | if (!TryOneClusterFast(trackParam, clusterCh2)) continue; | |
488 | ||
489 | // try to add the current cluster accuratly | |
490 | extrapTrackParamAtCluster2 = trackParam; | |
491 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster2, clusterCh2->GetZ()); | |
492 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2); | |
493 | ||
494 | // if good chi2 then try to attach a cluster in the other chamber too | |
495 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
496 | Bool_t foundSecondCluster = kFALSE; | |
497 | ||
498 | // Printout for debuging | |
499 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
500 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1 | |
501 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
502 | cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl; | |
503 | } | |
504 | ||
505 | // add MCS effect | |
506 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(),1.); | |
507 | ||
508 | // reset cluster iterator of chamber 1 | |
509 | nextInCh1.Reset(); | |
510 | iCluster1 = -1; | |
511 | ||
512 | // look for second candidates in chamber 1 | |
513 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
514 | iCluster1++; | |
515 | ||
516 | // try to add the current cluster fast | |
517 | if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue; | |
518 | ||
519 | // try to add the current cluster in addition to the one found in the previous chamber | |
520 | chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1); | |
521 | ||
522 | // if good chi2 then consider to add the 2 clusters to the "trackCandidate" | |
523 | if (chi2WithTwoClusters < maxChi2WithTwoClusters) { | |
524 | foundSecondCluster = kTRUE; | |
525 | foundTwoClusters = kTRUE; | |
526 | ||
527 | // Printout for debuging | |
528 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
529 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 | |
530 | << " (Chi2 = " << chi2WithTwoClusters << ")" << endl; | |
531 | } | |
532 | ||
533 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { | |
534 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters | |
535 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
536 | extrapTrackParamAtCluster1.SetRemovable(kTRUE); | |
537 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
538 | extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
539 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
540 | newTrack->GetTrackParamAtCluster()->Sort(); | |
541 | fNRecTracks++; | |
542 | ||
543 | // Tag clusterCh1 as used | |
544 | clusterCh1Used[iCluster1] = kTRUE; | |
545 | ||
546 | // Printout for debuging | |
547 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
548 | cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl; | |
549 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
550 | } | |
551 | ||
552 | } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) { | |
553 | // keep track of the best couple of clusters | |
554 | bestChi2WithTwoClusters = chi2WithTwoClusters; | |
555 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
556 | bestTrackParamAtCluster2 = extrapTrackParamAtCluster2; | |
557 | } | |
558 | ||
559 | } | |
560 | ||
561 | } | |
562 | ||
563 | // if no cluster found in chamber1 then consider to add clusterCh2 only | |
564 | if (!foundSecondCluster) { | |
565 | foundOneCluster = kTRUE; | |
566 | ||
567 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { | |
568 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster | |
569 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
570 | extrapTrackParamAtCluster2.SetRemovable(kFALSE); | |
571 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
572 | newTrack->GetTrackParamAtCluster()->Sort(); | |
573 | fNRecTracks++; | |
574 | ||
575 | // Printout for debuging | |
576 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
577 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl; | |
578 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
579 | } | |
580 | ||
581 | } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) { | |
582 | // keep track of the best cluster except if a couple of clusters has already been found | |
583 | bestChi2WithOneCluster = chi2WithOneCluster; | |
584 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster2; | |
585 | } | |
586 | ||
587 | } | |
588 | ||
589 | } | |
590 | ||
591 | } | |
592 | ||
593 | // look for candidates in chamber 1 not already attached to a track | |
594 | // if we want to keep all possible tracks or if no good couple of clusters has been found | |
595 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks() || !foundTwoClusters) { | |
596 | ||
597 | // Printout for debuging | |
598 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
599 | cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl; | |
600 | } | |
601 | ||
602 | //Extrapolate trackCandidate to chamber "ch2" | |
603 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); | |
604 | ||
605 | // add MCS effect for next step | |
606 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
607 | ||
608 | // reset cluster iterator of chamber 1 | |
609 | nextInCh1.Reset(); | |
610 | iCluster1 = -1; | |
611 | ||
612 | // look for second candidates in chamber 1 | |
613 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
614 | iCluster1++; | |
615 | ||
616 | if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used | |
617 | ||
618 | // try to add the current cluster fast | |
619 | if (!TryOneClusterFast(trackParam, clusterCh1)) continue; | |
620 | ||
621 | // try to add the current cluster accuratly | |
622 | extrapTrackParamAtCluster1 = trackParam; | |
623 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster1, clusterCh1->GetZ()); | |
624 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1); | |
625 | ||
626 | // if good chi2 then consider to add clusterCh1 | |
627 | // We do not try to attach a cluster in the other chamber too since it has already been done above | |
628 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
629 | foundOneCluster = kTRUE; | |
630 | ||
631 | // Printout for debuging | |
632 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
633 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 | |
634 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
635 | } | |
636 | ||
637 | if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { | |
638 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster | |
639 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
640 | extrapTrackParamAtCluster1.SetRemovable(kFALSE); | |
641 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
642 | newTrack->GetTrackParamAtCluster()->Sort(); | |
643 | fNRecTracks++; | |
644 | ||
645 | // Printout for debuging | |
646 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
647 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl; | |
648 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
649 | } | |
650 | ||
651 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { | |
652 | // keep track of the best cluster except if a couple of clusters has already been found | |
653 | bestChi2WithOneCluster = chi2WithOneCluster; | |
654 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
655 | } | |
656 | ||
657 | } | |
658 | ||
659 | } | |
660 | ||
661 | } | |
662 | ||
663 | // fill out the best track if required else clean up the fRecTracksPtr array | |
664 | if (!AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) { | |
665 | if (foundTwoClusters) { | |
666 | bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
667 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
668 | bestTrackParamAtCluster2.SetRemovable(kTRUE); | |
669 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr())); | |
670 | trackCandidate.GetTrackParamAtCluster()->Sort(); | |
671 | ||
672 | // Printout for debuging | |
673 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
674 | cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl; | |
675 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
676 | } | |
677 | ||
678 | } else if (foundOneCluster) { | |
679 | bestTrackParamAtCluster1.SetRemovable(kFALSE); | |
680 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
681 | trackCandidate.GetTrackParamAtCluster()->Sort(); | |
682 | ||
683 | // Printout for debuging | |
684 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
685 | cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl; | |
686 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
687 | } | |
688 | ||
689 | } else { | |
690 | delete [] clusterCh1Used; | |
691 | return kFALSE; | |
692 | } | |
693 | ||
694 | } else if (foundOneCluster || foundTwoClusters) { | |
695 | ||
696 | // remove obsolete track | |
697 | fRecTracksPtr->Remove(&trackCandidate); | |
698 | fNRecTracks--; | |
699 | ||
700 | } else { | |
701 | delete [] clusterCh1Used; | |
702 | return kFALSE; | |
703 | } | |
704 | ||
705 | delete [] clusterCh1Used; | |
706 | return kTRUE; | |
707 | ||
708 | } | |
709 | ||
710 | //__________________________________________________________________________ | |
711 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, | |
712 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
713 | const AliMUONVTriggerStore& triggerStore, | |
714 | const AliMUONTrackHitPattern& trackHitPattern) | |
715 | { | |
716 | /// Try to match track from tracking system with trigger track | |
717 | AliCodeTimerAuto(""); | |
718 | ||
719 | const Double_t kDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10)); | |
720 | ||
721 | //static const Double_t kDistSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY | |
722 | // sigma of distributions (trigger-track) X,Y,slopeY | |
723 | const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(), | |
724 | AliMUONConstants::TriggerBendingReso(), | |
725 | 1.414 * AliMUONConstants::TriggerBendingReso()/kDeltaZ}; | |
726 | ||
727 | const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso(); | |
728 | const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso(); | |
729 | const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/kDeltaZ; | |
730 | const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / kDeltaZ; | |
731 | ||
732 | // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks | |
733 | TMatrixD trigCov(3,3); | |
734 | trigCov.Zero(); | |
735 | trigCov(0,0) = kTrigNonBendReso * kTrigNonBendReso; | |
736 | trigCov(1,1) = kTrigBendReso * kTrigBendReso; | |
737 | trigCov(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso; | |
738 | trigCov(1,2) = trigCov(2,1) = kTrigCovSlopeBend; | |
739 | ||
740 | Int_t matchTrigger; | |
741 | Int_t loTrgNum(-1); | |
742 | Double_t distTriggerTrack[3], sigma2[3]; | |
743 | Double_t xTrack, yTrack, ySlopeTrack, chi2MatchTrigger, minChi2MatchTrigger, chi2; | |
744 | ||
745 | TIter itTrack(trackStore.CreateIterator()); | |
746 | AliMUONTrack* track; | |
747 | ||
748 | const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd(); | |
749 | const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm | |
750 | const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh(); | |
751 | ||
752 | while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) ) | |
753 | { | |
754 | matchTrigger = 0; | |
755 | chi2MatchTrigger = 0.; | |
756 | loTrgNum = -1; | |
757 | Int_t doubleMatch=-1; // Check if track matches 2 trigger tracks | |
758 | Double_t doubleChi2 = -1.; | |
759 | ||
760 | AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last()))); | |
761 | ||
762 | AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end | |
763 | AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects | |
764 | AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber | |
765 | ||
766 | const TMatrixD& kParamCov = trackParam.GetCovariances(); | |
767 | ||
768 | xTrack = trackParam.GetNonBendingCoor(); | |
769 | yTrack = trackParam.GetBendingCoor(); | |
770 | ySlopeTrack = trackParam.GetBendingSlope(); | |
771 | ||
772 | // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks | |
773 | TMatrixD trackCov(3,3); | |
774 | trackCov.Zero(); | |
775 | trackCov(0,0) = kParamCov(0,0); | |
776 | trackCov(1,1) = kParamCov(2,2); | |
777 | trackCov(2,2) = kParamCov(3,3); | |
778 | trackCov(1,2) = kParamCov(2,3); | |
779 | trackCov(2,1) = kParamCov(3,2); | |
780 | ||
781 | TMatrixD sumCov(trackCov,TMatrixD::kPlus,trigCov); | |
782 | ||
783 | Bool_t isCovOK = kTRUE; | |
784 | ||
785 | if (sumCov.Determinant() != 0) { | |
786 | sumCov.Invert(); | |
787 | } else { | |
788 | AliWarning(" Determinant = 0"); | |
789 | isCovOK = kFALSE; | |
790 | sigma2[0] = kParamCov(0,0); | |
791 | sigma2[1] = kParamCov(2,2); | |
792 | sigma2[2] = kParamCov(3,3); | |
793 | for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar]; | |
794 | } | |
795 | ||
796 | minChi2MatchTrigger = 999.; | |
797 | ||
798 | AliMUONTriggerTrack *triggerTrack; | |
799 | TIter itTriggerTrack(triggerTrackStore.CreateIterator()); | |
800 | while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ) | |
801 | { | |
802 | distTriggerTrack[0] = triggerTrack->GetX11()-xTrack; | |
803 | distTriggerTrack[1] = triggerTrack->GetY11()-yTrack; | |
804 | distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack; | |
805 | ||
806 | if(isCovOK){ | |
807 | TMatrixD paramDiff(3,1); | |
808 | for(Int_t iVar = 0; iVar < 3; iVar++) | |
809 | paramDiff(iVar,0) = distTriggerTrack[iVar]; | |
810 | ||
811 | TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff); | |
812 | TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp); | |
813 | chi2 = chi2M(0,0); | |
814 | } | |
815 | else { | |
816 | chi2 = 0.; | |
817 | for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar]; | |
818 | } | |
819 | ||
820 | chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY) | |
821 | if (chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger()) | |
822 | { | |
823 | Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.); | |
824 | if (chi2 < minChi2MatchTrigger && chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger()) | |
825 | { | |
826 | if(isDoubleTrack) | |
827 | { | |
828 | doubleMatch = loTrgNum; | |
829 | doubleChi2 = chi2MatchTrigger; | |
830 | } | |
831 | minChi2MatchTrigger = chi2; | |
832 | chi2MatchTrigger = chi2; | |
833 | loTrgNum = triggerTrack->GetLoTrgNum(); | |
834 | AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum); | |
835 | matchTrigger=1; | |
836 | if(locTrg->LoLpt()>0)matchTrigger=2; | |
837 | if(locTrg->LoHpt()>0)matchTrigger=3; | |
838 | } | |
839 | else if(isDoubleTrack) | |
840 | { | |
841 | doubleMatch = triggerTrack->GetLoTrgNum(); | |
842 | doubleChi2 = chi2; | |
843 | } | |
844 | } | |
845 | } | |
846 | if(doubleMatch>=0) | |
847 | { // If two trigger tracks match, select the one passing more trigger cuts | |
848 | AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch)); | |
849 | AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch); | |
850 | if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3)) | |
851 | { | |
852 | if(locTrg1->LoHpt()>0)matchTrigger=3; | |
853 | else matchTrigger=2; | |
854 | loTrgNum = doubleMatch; | |
855 | chi2MatchTrigger=doubleChi2; | |
856 | } | |
857 | } | |
858 | ||
859 | track->SetMatchTrigger(matchTrigger); | |
860 | track->SetLoTrgNum(loTrgNum); | |
861 | track->SetChi2MatchTrigger(chi2MatchTrigger); | |
862 | ||
863 | AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum)); | |
864 | ||
865 | if (locTrg) | |
866 | { | |
867 | track->SetLocalTrigger(locTrg->LoCircuit(), | |
868 | locTrg->LoStripX(), | |
869 | locTrg->LoStripY(), | |
870 | locTrg->LoDev(), | |
871 | locTrg->LoLpt(), | |
872 | locTrg->LoHpt()); | |
873 | } | |
874 | } | |
875 | ||
876 | trackHitPattern.GetHitPattern(trackStore,triggerStore); | |
877 | } | |
878 | ||
879 | //__________________________________________________________________________ | |
880 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
881 | const AliMUONVTriggerStore& triggerStore, | |
882 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
883 | { | |
884 | /// To make the trigger tracks from Local Trigger | |
885 | AliDebug(1, ""); | |
886 | AliCodeTimerAuto(""); | |
887 | ||
888 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); | |
889 | ||
890 | UChar_t gloTrigPat = 0; | |
891 | ||
892 | if (globalTrigger) | |
893 | { | |
894 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
895 | } | |
896 | ||
897 | TIter next(triggerStore.CreateIterator()); | |
898 | AliMUONLocalTrigger* locTrg(0x0); | |
899 | ||
900 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); | |
901 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
902 | ||
903 | AliMUONTriggerTrack triggerTrack; | |
904 | ||
905 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
906 | { | |
907 | Bool_t xTrig=kFALSE; | |
908 | Bool_t yTrig=kFALSE; | |
909 | ||
910 | Int_t localBoardId = locTrg->LoCircuit(); | |
911 | if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 && | |
912 | locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X | |
913 | else xTrig=kTRUE; // trigger in X | |
914 | if (locTrg->LoTrigY()==1 && | |
915 | locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y | |
916 | else yTrig = kTRUE; // trigger in Y | |
917 | ||
918 | if (xTrig && yTrig) | |
919 | { // make Trigger Track if trigger in X and Y | |
920 | ||
921 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); | |
922 | // need first to convert deviation to [0-30] | |
923 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
924 | Int_t deviation = locTrg->LoDev(); | |
925 | Int_t sign = 0; | |
926 | if ( !locTrg->LoSdev() && deviation ) sign=-1; | |
927 | if ( !locTrg->LoSdev() && !deviation ) sign= 0; | |
928 | if ( locTrg->LoSdev() == 1 ) sign=+1; | |
929 | deviation *= sign; | |
930 | deviation += 15; | |
931 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; | |
932 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); | |
933 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); | |
934 | ||
935 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(), | |
936 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
937 | ||
938 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
939 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
940 | ||
941 | triggerTrack.SetX11(x11); | |
942 | triggerTrack.SetY11(y11); | |
943 | triggerTrack.SetThetax(thetax); | |
944 | triggerTrack.SetThetay(thetay); | |
945 | triggerTrack.SetGTPattern(gloTrigPat); | |
946 | triggerTrack.SetLoTrgNum(localBoardId); | |
947 | ||
948 | triggerTrackStore.Add(triggerTrack); | |
949 | } // board is fired | |
950 | } // end of loop on Local Trigger | |
951 | } | |
952 |