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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 | ||
18 | //////////////////////////////////// | |
06ca6d7b | 19 | /// |
c4ee792d | 20 | /// \class AliMUONVTrackReconstructor |
06ca6d7b | 21 | /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
22 | /// | |
23 | /// This class contains as data: | |
24 | /// * a pointer to the array of hits to be reconstructed (the event) | |
25 | /// * a pointer to the array of segments made with these hits inside each station | |
26 | /// * a pointer to the array of reconstructed tracks | |
27 | /// | |
28 | /// It contains as methods, among others: | |
29 | /// * EventReconstruct to build the muon tracks | |
30 | /// * EventReconstructTrigger to build the trigger tracks | |
31 | /// | |
dfb547bf | 32 | /// Several options and adjustable parameters are available for both Kalman and Original |
33 | /// tracking algorithms (hard coded for the moment in AliMUONVTrackReconstructor.cxx): | |
34 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be | |
35 | /// attached to the track candidate and to select good tracks. | |
36 | /// - *fgkTrackAllTracks* : according to the value of this flag, in case that several | |
37 | /// new clusters pass the quality cut, either we consider all the possibilities | |
38 | /// (duplicating tracks) or we attach only the best cluster. | |
39 | /// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks | |
40 | /// lost during the tracking by removing the worst of the 2 clusters attached in the | |
41 | /// previous station. | |
42 | /// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality | |
43 | /// of the tracks at the end of the tracking by removing clusters that do not pass | |
44 | /// new quality cut (within the limit that we must keep at least one cluster per | |
45 | /// the station). | |
46 | /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the | |
47 | /// quality of the tracks. | |
48 | /// | |
c4ee792d | 49 | /// \author Philippe Pillot |
50 | /// | |
8d0843c6 | 51 | //////////////////////////////////// |
52 | ||
8d0843c6 | 53 | #include "AliMUONVTrackReconstructor.h" |
7ec3b9cf | 54 | |
8d0843c6 | 55 | #include "AliMUONConstants.h" |
ea94c18b | 56 | #include "AliMUONRawCluster.h" |
8d0843c6 | 57 | #include "AliMUONHitForRec.h" |
208f139e | 58 | #include "AliMUONObjectPair.h" |
8d0843c6 | 59 | #include "AliMUONTriggerTrack.h" |
e1a10d41 | 60 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 61 | #include "AliMUONLocalTrigger.h" |
62 | #include "AliMUONGlobalTrigger.h" | |
8d0843c6 | 63 | #include "AliMUONTrack.h" |
37827b29 | 64 | #include "AliMUONTrackParam.h" |
65 | #include "AliMUONTrackExtrap.h" | |
7771752e | 66 | #include "AliMUONTrackHitPattern.h" |
7ec3b9cf | 67 | #include "AliMUONVTrackStore.h" |
68 | #include "AliMUONVClusterStore.h" | |
69 | #include "AliMUONRawCluster.h" | |
7ec3b9cf | 70 | #include "AliMUONVTriggerStore.h" |
71 | #include "AliMUONVTriggerTrackStore.h" | |
ea94c18b | 72 | #include "AliMpDEManager.h" |
73 | ||
74 | #include "AliLog.h" | |
75 | #include "AliTracker.h" | |
8d0843c6 | 76 | |
4889d34c | 77 | #include <TClonesArray.h> |
78 | #include <TMath.h> | |
ea94c18b | 79 | #include <TMatrixD.h> |
80 | ||
81 | #include <Riostream.h> | |
4889d34c | 82 | |
78649106 | 83 | /// \cond CLASSIMP |
8d0843c6 | 84 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 85 | /// \endcond |
8d0843c6 | 86 | |
87 | //************* Defaults parameters for reconstruction | |
88 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0; | |
89 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxBendingMomentum = 3000.0; | |
208f139e | 90 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxNormChi2MatchTrigger = 16.0; |
8d0843c6 | 91 | |
ea94c18b | 92 | const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForTracking = 6.0; |
93 | const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForImprovement = 4.0; | |
94 | const Bool_t AliMUONVTrackReconstructor::fgkTrackAllTracks = kTRUE; | |
95 | const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceBending = 2.; | |
96 | const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceNonBending = 2.; | |
97 | const Bool_t AliMUONVTrackReconstructor::fgkRecoverTracks = kTRUE; | |
98 | const Bool_t AliMUONVTrackReconstructor::fgkImproveTracks = kTRUE; | |
99 | ||
100 | ||
101 | //__________________________________________________________________________ | |
7ec3b9cf | 102 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor() |
8d0843c6 | 103 | : TObject(), |
104 | fMinBendingMomentum(fgkDefaultMinBendingMomentum), | |
105 | fMaxBendingMomentum(fgkDefaultMaxBendingMomentum), | |
208f139e | 106 | fMaxNormChi2MatchTrigger(fgkDefaultMaxNormChi2MatchTrigger), |
8d0843c6 | 107 | fHitsForRecPtr(0x0), |
108 | fNHitsForRec(0), | |
109 | fNHitsForRecPerChamber(0x0), | |
110 | fIndexOfFirstHitForRecPerChamber(0x0), | |
8d0843c6 | 111 | fRecTracksPtr(0x0), |
7ec3b9cf | 112 | fNRecTracks(0) |
8d0843c6 | 113 | { |
114 | /// Constructor for class AliMUONVTrackReconstructor | |
8d0843c6 | 115 | fNHitsForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; |
116 | fIndexOfFirstHitForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; | |
117 | ||
8d0843c6 | 118 | // Memory allocation for the TClonesArray of hits for reconstruction |
119 | // Is 10000 the right size ???? | |
120 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
ea94c18b | 121 | |
122 | // Memory allocation for the TClonesArray of reconstructed tracks | |
123 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
7ec3b9cf | 124 | |
208f139e | 125 | // set the magnetic field for track extrapolations |
8d0843c6 | 126 | const AliMagF* kField = AliTracker::GetFieldMap(); |
127 | if (!kField) AliFatal("No field available"); | |
37827b29 | 128 | AliMUONTrackExtrap::SetField(kField); |
8d0843c6 | 129 | } |
130 | ||
131 | //__________________________________________________________________________ | |
ea94c18b | 132 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 133 | { |
134 | /// Destructor for class AliMUONVTrackReconstructor | |
8d0843c6 | 135 | delete [] fNHitsForRecPerChamber; |
136 | delete [] fIndexOfFirstHitForRecPerChamber; | |
8d0843c6 | 137 | delete fHitsForRecPtr; |
ea94c18b | 138 | delete fRecTracksPtr; |
8d0843c6 | 139 | } |
140 | ||
ea94c18b | 141 | //__________________________________________________________________________ |
142 | void AliMUONVTrackReconstructor::ResetHitsForRec() | |
143 | { | |
144 | /// To reset the TClonesArray of HitsForRec, | |
145 | /// and the number of HitForRec and the index of the first HitForRec per chamber | |
146 | if (fHitsForRecPtr) fHitsForRecPtr->Clear("C"); | |
147 | fNHitsForRec = 0; | |
148 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
149 | fNHitsForRecPerChamber[ch] = 0; | |
150 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
151 | } | |
152 | } | |
153 | ||
154 | //__________________________________________________________________________ | |
155 | void AliMUONVTrackReconstructor::ResetTracks() | |
156 | { | |
157 | /// To reset the TClonesArray of reconstructed tracks | |
158 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
159 | fNRecTracks = 0; | |
160 | return; | |
161 | } | |
162 | ||
163 | //__________________________________________________________________________ | |
164 | void AliMUONVTrackReconstructor::EventReconstruct(const AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) | |
165 | { | |
166 | /// To reconstruct one event | |
167 | AliDebug(1,""); | |
168 | ||
169 | ResetTracks(); | |
170 | ResetHitsForRec(); | |
171 | AddHitsForRecFromRawClusters(clusterStore); | |
172 | MakeTracks(); | |
173 | ||
174 | // Add tracks to MUON data container | |
175 | for (Int_t i=0; i<fNRecTracks; ++i) | |
176 | { | |
177 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
178 | trackStore.Add(*track); | |
179 | } | |
180 | } | |
181 | ||
182 | //__________________________________________________________________________ | |
183 | void AliMUONVTrackReconstructor::AddHitsForRecFromRawClusters(const AliMUONVClusterStore& clusterStore) | |
7ec3b9cf | 184 | { |
185 | /// Build internal array of hit for rec from clusterStore | |
186 | ||
187 | TIter next(clusterStore.CreateIterator()); | |
188 | AliMUONRawCluster* clus(0x0); | |
189 | Int_t iclus(0); | |
190 | ||
191 | while ( ( clus = static_cast<AliMUONRawCluster*>(next()) ) ) | |
192 | { | |
193 | // new AliMUONHitForRec from raw cluster | |
194 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
195 | AliMUONHitForRec* hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
196 | fNHitsForRec++; | |
197 | // more information into HitForRec | |
198 | hitForRec->SetBendingReso2(clus->GetErrY() * clus->GetErrY()); | |
199 | hitForRec->SetNonBendingReso2(clus->GetErrX() * clus->GetErrX()); | |
200 | // original raw cluster | |
201 | Int_t ch = AliMpDEManager::GetChamberId(clus->GetDetElemId()); | |
202 | hitForRec->SetChamberNumber(ch); | |
203 | hitForRec->SetHitNumber(iclus); | |
204 | // Z coordinate of the raw cluster (cm) | |
205 | hitForRec->SetZ(clus->GetZ(0)); | |
206 | if (AliLog::GetDebugLevel("MUON","AliMUONTrackReconstructor") >= 3) { | |
207 | cout << "Chamber " << ch <<" raw cluster " << iclus << " : " << endl; | |
208 | clus->Print("full"); | |
209 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
210 | hitForRec->Print("full"); | |
211 | } | |
212 | ++iclus; | |
213 | } // end of chamber loop | |
214 | ||
215 | SortHitsForRecWithIncreasingChamber(); | |
216 | ||
217 | AliDebug(1,"End of AddHitsForRecFromRawClusters"); | |
218 | ||
219 | if (AliLog::GetGlobalDebugLevel() > 0) | |
220 | { | |
221 | AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec)); | |
222 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
223 | { | |
224 | AliDebug(1, Form("Chamber(0...): %d",ch)); | |
225 | AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch])); | |
226 | AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch])); | |
227 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
228 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
229 | hit++) { | |
230 | AliDebug(1, Form("HitForRec index(0...): %d",hit)); | |
231 | ((*fHitsForRecPtr)[hit])->Dump(); | |
232 | } | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
8d0843c6 | 237 | //__________________________________________________________________________ |
238 | void AliMUONVTrackReconstructor::SortHitsForRecWithIncreasingChamber() | |
239 | { | |
240 | /// Sort HitsForRec's in increasing order with respect to chamber number. | |
241 | /// Uses the function "Compare". | |
242 | /// Update the information for HitsForRec per chamber too. | |
243 | Int_t ch, nhits, prevch; | |
244 | fHitsForRecPtr->Sort(); | |
245 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
246 | fNHitsForRecPerChamber[ch] = 0; | |
247 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
248 | } | |
249 | prevch = 0; // previous chamber | |
250 | nhits = 0; // number of hits in current chamber | |
251 | // Loop over HitsForRec | |
252 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
253 | // chamber number (0...) | |
254 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
255 | // increment number of hits in current chamber | |
256 | (fNHitsForRecPerChamber[ch])++; | |
257 | // update index of first HitForRec in current chamber | |
258 | // if chamber number different from previous one | |
259 | if (ch != prevch) { | |
260 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
261 | prevch = ch; | |
262 | } | |
263 | } | |
264 | return; | |
265 | } | |
266 | ||
ea94c18b | 267 | //__________________________________________________________________________ |
268 | void AliMUONVTrackReconstructor::MakeTracks() | |
269 | { | |
270 | /// To make the tracks from the list of segments and points in all stations | |
271 | AliDebug(1,"Enter MakeTracks"); | |
272 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
273 | MakeTrackCandidates(); | |
274 | if (fRecTracksPtr->GetEntriesFast() == 0) return; | |
275 | // Follow tracks in stations(1..) 3, 2 and 1 | |
276 | FollowTracks(); | |
277 | // Improve the reconstructed tracks | |
278 | if (fgkImproveTracks) ImproveTracks(); | |
279 | // Remove double tracks | |
280 | RemoveDoubleTracks(); | |
281 | // Fill AliMUONTrack data members | |
282 | Finalize(); | |
283 | } | |
284 | ||
8d0843c6 | 285 | //__________________________________________________________________________ |
208f139e | 286 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(Int_t station) |
8d0843c6 | 287 | { |
208f139e | 288 | /// To make the list of segments in station(0..) "Station" from the list of hits to be reconstructed. |
289 | /// Return a new TClonesArray of segments. | |
290 | /// It is the responsibility of the user to delete it afterward. | |
291 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",station)); | |
292 | ||
8d0843c6 | 293 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; |
208f139e | 294 | AliMUONObjectPair *segment; |
22ccc301 | 295 | Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning |
7ec3b9cf | 296 | // first and second chambers (0...) in the station |
208f139e | 297 | Int_t ch1 = 2 * station; |
8d0843c6 | 298 | Int_t ch2 = ch1 + 1; |
7ec3b9cf | 299 | |
208f139e | 300 | // list of segments |
301 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", fNHitsForRecPerChamber[ch2]); | |
7ec3b9cf | 302 | segments->SetOwner(kTRUE); |
303 | ||
208f139e | 304 | // Loop over HitForRec's in the first chamber of the station |
8d0843c6 | 305 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; |
306 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
7ec3b9cf | 307 | hit1++) |
308 | { | |
8d0843c6 | 309 | // pointer to the HitForRec |
310 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
208f139e | 311 | // Loop over HitsForRec's in the second chamber of the station |
8d0843c6 | 312 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; |
7ec3b9cf | 313 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; |
314 | hit2++) | |
315 | { | |
8d0843c6 | 316 | // pointer to the HitForRec |
317 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
7ec3b9cf | 318 | if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0. ) |
319 | { | |
22ccc301 | 320 | // bending slope |
208f139e | 321 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / (hit1Ptr->GetZ() - hit2Ptr->GetZ()); |
322 | // impact parameter | |
323 | impactParam = hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope; | |
324 | // absolute value of bending momentum | |
7ec3b9cf | 325 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam)); |
326 | } else | |
327 | { | |
208f139e | 328 | AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): no segment created"); |
329 | continue; | |
330 | } | |
22ccc301 | 331 | // check for bending momentum within tolerances |
7ec3b9cf | 332 | if ((bendingMomentum < fMaxBendingMomentum) && (bendingMomentum > fMinBendingMomentum)) |
333 | { | |
334 | // make new segment | |
335 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(hit1Ptr, hit2Ptr, kFALSE, kFALSE); | |
336 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
337 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
338 | segment->Dump(); | |
339 | cout << "HitForRec in first chamber" << endl; | |
340 | hit1Ptr->Dump(); | |
341 | cout << "HitForRec in second chamber" << endl; | |
342 | hit2Ptr->Dump(); | |
343 | } | |
8d0843c6 | 344 | } |
345 | } //for (Int_t hit2 | |
346 | } // for (Int_t hit1... | |
208f139e | 347 | AliDebug(1,Form("Station: %d NSegments: %d ", station, segments->GetEntriesFast())); |
348 | return segments; | |
8d0843c6 | 349 | } |
350 | ||
ea94c18b | 351 | //__________________________________________________________________________ |
352 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
353 | { | |
354 | /// To remove identical tracks: | |
355 | /// Tracks are considered identical if they have all their hits in common. | |
356 | /// One keeps the track with the larger number of hits if need be | |
357 | AliMUONTrack *track1, *track2, *trackToRemove; | |
358 | Int_t hitsInCommon, nHits1, nHits2; | |
359 | Bool_t removedTrack1; | |
360 | // Loop over first track of the pair | |
361 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
362 | while (track1) { | |
363 | removedTrack1 = kFALSE; | |
364 | nHits1 = track1->GetNTrackHits(); | |
365 | // Loop over second track of the pair | |
366 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
367 | while (track2) { | |
368 | nHits2 = track2->GetNTrackHits(); | |
369 | // number of hits in common between two tracks | |
370 | hitsInCommon = track1->HitsInCommon(track2); | |
371 | // check for identical tracks | |
372 | if ((hitsInCommon == nHits1) || (hitsInCommon == nHits2)) { | |
373 | // decide which track to remove | |
374 | if (nHits2 > nHits1) { | |
375 | // remove track1 and continue the first loop with the track next to track1 | |
376 | trackToRemove = track1; | |
377 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
378 | fRecTracksPtr->Remove(trackToRemove); | |
379 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
380 | fNRecTracks--; | |
381 | removedTrack1 = kTRUE; | |
382 | break; | |
383 | } else { | |
384 | // remove track2 and continue the second loop with the track next to track2 | |
385 | trackToRemove = track2; | |
386 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
387 | fRecTracksPtr->Remove(trackToRemove); | |
388 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
389 | fNRecTracks--; | |
390 | } | |
391 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
392 | } // track2 | |
393 | if (removedTrack1) continue; | |
394 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
395 | } // track1 | |
396 | return; | |
397 | } | |
398 | ||
399 | //__________________________________________________________________________ | |
400 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
401 | { | |
402 | /// To remove double tracks: | |
403 | /// Tracks are considered identical if more than half of the hits of the track | |
404 | /// which has the smaller number of hits are in common with the other track. | |
405 | /// Among two identical tracks, one keeps the track with the larger number of hits | |
406 | /// or, if these numbers are equal, the track with the minimum chi2. | |
407 | AliMUONTrack *track1, *track2, *trackToRemove; | |
408 | Int_t hitsInCommon, nHits1, nHits2; | |
409 | Bool_t removedTrack1; | |
410 | // Loop over first track of the pair | |
411 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
412 | while (track1) { | |
413 | removedTrack1 = kFALSE; | |
414 | nHits1 = track1->GetNTrackHits(); | |
415 | // Loop over second track of the pair | |
416 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
417 | while (track2) { | |
418 | nHits2 = track2->GetNTrackHits(); | |
419 | // number of hits in common between two tracks | |
420 | hitsInCommon = track1->HitsInCommon(track2); | |
421 | // check for identical tracks | |
422 | if (((nHits1 < nHits2) && (2 * hitsInCommon > nHits1)) || (2 * hitsInCommon > nHits2)) { | |
423 | // decide which track to remove | |
424 | if ((nHits1 > nHits2) || ((nHits1 == nHits2) && (track1->GetFitFMin() <= track2->GetFitFMin()))) { | |
425 | // remove track2 and continue the second loop with the track next to track2 | |
426 | trackToRemove = track2; | |
427 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
428 | fRecTracksPtr->Remove(trackToRemove); | |
429 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
430 | fNRecTracks--; | |
431 | } else { | |
432 | // else remove track1 and continue the first loop with the track next to track1 | |
433 | trackToRemove = track1; | |
434 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
435 | fRecTracksPtr->Remove(trackToRemove); | |
436 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
437 | fNRecTracks--; | |
438 | removedTrack1 = kTRUE; | |
439 | break; | |
440 | } | |
441 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
442 | } // track2 | |
443 | if (removedTrack1) continue; | |
444 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
445 | } // track1 | |
446 | return; | |
447 | } | |
448 | ||
449 | //__________________________________________________________________________ | |
450 | Double_t AliMUONVTrackReconstructor::TryOneHitForRec(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec, | |
451 | AliMUONTrackParam &trackParamAtHit, Bool_t updatePropagator) | |
452 | { | |
453 | /// Test the compatibility between the track and the hitForRec (using trackParam's covariance matrix): | |
454 | /// return the corresponding Chi2 | |
455 | /// return trackParamAtHit | |
456 | ||
457 | if (!trackParam.CovariancesExist()) AliWarning(" track parameter covariance matrix does not exist"); | |
458 | ||
459 | // extrapolate track parameters and covariances at the z position of the tested hit | |
460 | if (&trackParam != &trackParamAtHit) { | |
461 | trackParamAtHit = trackParam; | |
462 | AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtHit, hitForRec->GetZ(), updatePropagator); | |
463 | } | |
464 | ||
465 | // set pointer to hit into trackParamAtHit | |
466 | trackParamAtHit.SetHitForRecPtr(hitForRec); | |
467 | ||
468 | // Set differences between trackParam and hitForRec in the bending and non bending directions | |
469 | TMatrixD dPos(2,1); | |
470 | dPos(0,0) = hitForRec->GetNonBendingCoor() - trackParamAtHit.GetNonBendingCoor(); | |
471 | dPos(1,0) = hitForRec->GetBendingCoor() - trackParamAtHit.GetBendingCoor(); | |
472 | ||
473 | // quick test of hitForRec compatibility within a wide road of x*y = 10*1 cm2 to save computing time | |
474 | if (TMath::Abs(dPos(0,0)) > fgkMaxTrackingDistanceNonBending || | |
475 | TMath::Abs(dPos(1,0)) > fgkMaxTrackingDistanceBending) return 1.e10; | |
476 | ||
477 | // Set the error matrix from trackParam covariances and hitForRec resolution | |
478 | const TMatrixD& kParamCov = trackParamAtHit.GetCovariances(); | |
479 | TMatrixD error(2,2); | |
480 | error(0,0) = kParamCov(0,0) + hitForRec->GetNonBendingReso2(); | |
481 | error(0,1) = kParamCov(0,2); | |
482 | error(1,0) = kParamCov(2,0); | |
483 | error(1,1) = kParamCov(2,2) + hitForRec->GetBendingReso2(); | |
484 | ||
485 | // Invert the error matrix for Chi2 calculation | |
486 | if (error.Determinant() != 0) { | |
487 | error.Invert(); | |
488 | } else { | |
489 | AliWarning(" Determinant error=0"); | |
490 | return 1.e10; | |
491 | } | |
492 | ||
493 | // Compute the Chi2 value | |
494 | TMatrixD tmp(dPos,TMatrixD::kTransposeMult,error); | |
495 | TMatrixD result(tmp,TMatrixD::kMult,dPos); | |
496 | ||
497 | return result(0,0); | |
498 | ||
499 | } | |
500 | ||
501 | //__________________________________________________________________________ | |
7ec3b9cf | 502 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
503 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
504 | const AliMUONVTriggerStore& triggerStore, | |
505 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 506 | { |
507 | /// Try to match track from tracking system with trigger track | |
06ca6d7b | 508 | static const Double_t kDistSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY |
208f139e | 509 | |
7771752e | 510 | Int_t matchTrigger; |
7ec3b9cf | 511 | Int_t loTrgNum(-1); |
8d0843c6 | 512 | Double_t distTriggerTrack[3]; |
208f139e | 513 | Double_t xTrack, yTrack, ySlopeTrack, chi2MatchTrigger, minChi2MatchTrigger, chi2; |
7ec3b9cf | 514 | |
515 | TIter itTrack(trackStore.CreateIterator()); | |
516 | AliMUONTrack* track; | |
8d0843c6 | 517 | |
7ec3b9cf | 518 | while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) ) |
519 | { | |
423b32ca | 520 | matchTrigger = 0; |
8d0843c6 | 521 | chi2MatchTrigger = 0.; |
c6ba19f7 | 522 | loTrgNum = -1; |
7771752e | 523 | Int_t doubleMatch=-1; // Check if track matches 2 trigger tracks |
524 | Double_t doubleChi2 = -1.; | |
7ec3b9cf | 525 | |
526 | AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtHit()->Last()))); | |
37827b29 | 527 | AliMUONTrackExtrap::ExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber |
8d0843c6 | 528 | |
529 | xTrack = trackParam.GetNonBendingCoor(); | |
530 | yTrack = trackParam.GetBendingCoor(); | |
531 | ySlopeTrack = trackParam.GetBendingSlope(); | |
208f139e | 532 | minChi2MatchTrigger = 999.; |
7ec3b9cf | 533 | |
534 | AliMUONTriggerTrack *triggerTrack; | |
535 | TIter itTriggerTrack(triggerTrackStore.CreateIterator()); | |
536 | while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ) | |
537 | { | |
06ca6d7b | 538 | distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/kDistSigma[0]; |
539 | distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/kDistSigma[1]; | |
540 | distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/kDistSigma[2]; | |
208f139e | 541 | chi2 = 0.; |
542 | for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]; | |
543 | chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY) | |
7ec3b9cf | 544 | if (chi2 < fMaxNormChi2MatchTrigger) |
545 | { | |
546 | Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.); | |
547 | if (chi2 < minChi2MatchTrigger && chi2 < fMaxNormChi2MatchTrigger) | |
548 | { | |
549 | if(isDoubleTrack) | |
550 | { | |
551 | doubleMatch = loTrgNum; | |
552 | doubleChi2 = chi2MatchTrigger; | |
553 | } | |
554 | minChi2MatchTrigger = chi2; | |
555 | chi2MatchTrigger = chi2; | |
556 | loTrgNum = triggerTrack->GetLoTrgNum(); | |
557 | AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum); | |
558 | matchTrigger=1; | |
559 | if(locTrg->LoLpt()>0)matchTrigger=2; | |
560 | if(locTrg->LoHpt()>0)matchTrigger=3; | |
561 | } | |
562 | else if(isDoubleTrack) | |
563 | { | |
564 | doubleMatch = triggerTrack->GetLoTrgNum(); | |
565 | doubleChi2 = chi2; | |
566 | } | |
8d0843c6 | 567 | } |
8d0843c6 | 568 | } |
7ec3b9cf | 569 | if(doubleMatch>=0) |
570 | { // If two trigger tracks match, select the one passing more trigger cuts | |
571 | AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch)); | |
572 | AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch); | |
573 | if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3)) | |
574 | { | |
575 | if(locTrg1->LoHpt()>0)matchTrigger=3; | |
576 | else matchTrigger=2; | |
577 | loTrgNum = doubleMatch; | |
578 | chi2MatchTrigger=doubleChi2; | |
579 | } | |
7771752e | 580 | } |
8d0843c6 | 581 | |
582 | track->SetMatchTrigger(matchTrigger); | |
c6ba19f7 | 583 | track->SetLoTrgNum(loTrgNum); |
8d0843c6 | 584 | track->SetChi2MatchTrigger(chi2MatchTrigger); |
7ec3b9cf | 585 | |
586 | AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum)); | |
587 | ||
588 | if (locTrg) | |
589 | { | |
590 | track->SetLocalTrigger(locTrg->LoCircuit(), | |
591 | locTrg->LoStripX(), | |
592 | locTrg->LoStripY(), | |
593 | locTrg->LoDev(), | |
594 | locTrg->LoLpt(), | |
595 | locTrg->LoHpt()); | |
596 | } | |
597 | } | |
598 | ||
599 | trackHitPattern.GetHitPattern(trackStore,triggerStore); | |
8d0843c6 | 600 | } |
601 | ||
ea94c18b | 602 | //__________________________________________________________________________ |
603 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
604 | const AliMUONVTriggerStore& triggerStore, | |
605 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 606 | { |
71a2d3aa | 607 | /// To make the trigger tracks from Local Trigger |
7ec3b9cf | 608 | AliDebug(1, ""); |
609 | ||
610 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); | |
e6b25a6e | 611 | |
7ec3b9cf | 612 | UChar_t gloTrigPat = 0; |
e6b25a6e | 613 | |
7ec3b9cf | 614 | if (globalTrigger) |
615 | { | |
616 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 617 | } |
618 | ||
7ec3b9cf | 619 | TIter next(triggerStore.CreateIterator()); |
620 | AliMUONLocalTrigger* locTrg(0x0); | |
8d0843c6 | 621 | |
e6b25a6e | 622 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
623 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
7cf63da6 | 624 | |
7ec3b9cf | 625 | AliMUONTriggerTrack triggerTrack; |
626 | ||
627 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
628 | { | |
629 | Bool_t xTrig=kFALSE; | |
630 | Bool_t yTrig=kFALSE; | |
631 | ||
32ab62c9 | 632 | Int_t localBoardId = locTrg->LoCircuit(); |
7ec3b9cf | 633 | if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 && |
634 | locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X | |
635 | else xTrig=kTRUE; // trigger in X | |
636 | if (locTrg->LoTrigY()==1 && | |
637 | locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y | |
638 | else yTrig = kTRUE; // trigger in Y | |
639 | ||
640 | if (xTrig && yTrig) | |
641 | { // make Trigger Track if trigger in X and Y | |
8b0baca4 | 642 | |
32ab62c9 | 643 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); |
7ec3b9cf | 644 | // need first to convert deviation to [0-30] |
645 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
646 | Int_t deviation = locTrg->LoDev(); | |
647 | Int_t sign = 0; | |
648 | if ( !locTrg->LoSdev() && deviation ) sign=-1; | |
649 | if ( !locTrg->LoSdev() && !deviation ) sign= 0; | |
650 | if ( locTrg->LoSdev() == 1 ) sign=+1; | |
651 | deviation *= sign; | |
652 | deviation += 15; | |
653 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; | |
32ab62c9 | 654 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); |
655 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); | |
7ec3b9cf | 656 | |
657 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(), | |
658 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
659 | ||
660 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
661 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
662 | ||
663 | triggerTrack.SetX11(x11); | |
664 | triggerTrack.SetY11(y11); | |
665 | triggerTrack.SetThetax(thetax); | |
666 | triggerTrack.SetThetay(thetay); | |
667 | triggerTrack.SetGTPattern(gloTrigPat); | |
32ab62c9 | 668 | triggerTrack.SetLoTrgNum(localBoardId); |
7ec3b9cf | 669 | |
670 | triggerTrackStore.Add(triggerTrack); | |
671 | } // board is fired | |
e6b25a6e | 672 | } // end of loop on Local Trigger |
8d0843c6 | 673 | } |
ea94c18b | 674 |