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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 | /// | |
22 | /// This class contains as data: | |
23 | /// * a pointer to the array of hits to be reconstructed (the event) | |
06ca6d7b | 24 | /// * a pointer to the array of reconstructed tracks |
25 | /// | |
26 | /// It contains as methods, among others: | |
27 | /// * EventReconstruct to build the muon tracks | |
28 | /// * EventReconstructTrigger to build the trigger tracks | |
29 | /// | |
dfb547bf | 30 | /// Several options and adjustable parameters are available for both Kalman and Original |
31 | /// tracking algorithms (hard coded for the moment in AliMUONVTrackReconstructor.cxx): | |
32 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be | |
33 | /// attached to the track candidate and to select good tracks. | |
019df241 | 34 | /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates |
35 | /// are made assuming linear propagation between stations 4 and 5. | |
dfb547bf | 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 |
3d1463c8 | 50 | //----------------------------------------------------------------------------- |
8d0843c6 | 51 | |
8d0843c6 | 52 | #include "AliMUONVTrackReconstructor.h" |
7ec3b9cf | 53 | |
8d0843c6 | 54 | #include "AliMUONConstants.h" |
55 | #include "AliMUONHitForRec.h" | |
208f139e | 56 | #include "AliMUONObjectPair.h" |
8d0843c6 | 57 | #include "AliMUONTriggerTrack.h" |
e1a10d41 | 58 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 59 | #include "AliMUONLocalTrigger.h" |
60 | #include "AliMUONGlobalTrigger.h" | |
8d0843c6 | 61 | #include "AliMUONTrack.h" |
37827b29 | 62 | #include "AliMUONTrackParam.h" |
63 | #include "AliMUONTrackExtrap.h" | |
7771752e | 64 | #include "AliMUONTrackHitPattern.h" |
7ec3b9cf | 65 | #include "AliMUONVTrackStore.h" |
66 | #include "AliMUONVClusterStore.h" | |
2060b217 | 67 | #include "AliMUONVCluster.h" |
7ec3b9cf | 68 | #include "AliMUONVTriggerStore.h" |
69 | #include "AliMUONVTriggerTrackStore.h" | |
ea94c18b | 70 | #include "AliMpDEManager.h" |
71 | ||
72 | #include "AliLog.h" | |
b709ac13 | 73 | #include "AliCodeTimer.h" |
ea94c18b | 74 | #include "AliTracker.h" |
8d0843c6 | 75 | |
4889d34c | 76 | #include <TClonesArray.h> |
77 | #include <TMath.h> | |
ea94c18b | 78 | #include <TMatrixD.h> |
79 | ||
80 | #include <Riostream.h> | |
4889d34c | 81 | |
78649106 | 82 | /// \cond CLASSIMP |
8d0843c6 | 83 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 84 | /// \endcond |
8d0843c6 | 85 | |
019df241 | 86 | |
8d0843c6 | 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; |
019df241 | 91 | const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceBending = 2.; |
92 | const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceNonBending = 2.; | |
8d0843c6 | 93 | |
ea94c18b | 94 | const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForTracking = 6.0; |
019df241 | 95 | const Bool_t AliMUONVTrackReconstructor::fgkMakeTrackCandidatesFast = kFALSE; |
ea94c18b | 96 | const Bool_t AliMUONVTrackReconstructor::fgkTrackAllTracks = kTRUE; |
ea94c18b | 97 | const Bool_t AliMUONVTrackReconstructor::fgkRecoverTracks = kTRUE; |
b709ac13 | 98 | const Bool_t AliMUONVTrackReconstructor::fgkComplementTracks = kTRUE; |
ea94c18b | 99 | const Bool_t AliMUONVTrackReconstructor::fgkImproveTracks = kTRUE; |
b709ac13 | 100 | const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForImprovement = 5.0; |
ea94c18b | 101 | |
102 | ||
103 | //__________________________________________________________________________ | |
7ec3b9cf | 104 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor() |
8d0843c6 | 105 | : TObject(), |
106 | fMinBendingMomentum(fgkDefaultMinBendingMomentum), | |
107 | fMaxBendingMomentum(fgkDefaultMaxBendingMomentum), | |
208f139e | 108 | fMaxNormChi2MatchTrigger(fgkDefaultMaxNormChi2MatchTrigger), |
8d0843c6 | 109 | fHitsForRecPtr(0x0), |
110 | fNHitsForRec(0), | |
111 | fNHitsForRecPerChamber(0x0), | |
112 | fIndexOfFirstHitForRecPerChamber(0x0), | |
8d0843c6 | 113 | fRecTracksPtr(0x0), |
7ec3b9cf | 114 | fNRecTracks(0) |
8d0843c6 | 115 | { |
116 | /// Constructor for class AliMUONVTrackReconstructor | |
8d0843c6 | 117 | fNHitsForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; |
118 | fIndexOfFirstHitForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; | |
119 | ||
8d0843c6 | 120 | // Memory allocation for the TClonesArray of hits for reconstruction |
121 | // Is 10000 the right size ???? | |
122 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
ea94c18b | 123 | |
124 | // Memory allocation for the TClonesArray of reconstructed tracks | |
125 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
7ec3b9cf | 126 | |
208f139e | 127 | // set the magnetic field for track extrapolations |
8d0843c6 | 128 | const AliMagF* kField = AliTracker::GetFieldMap(); |
129 | if (!kField) AliFatal("No field available"); | |
37827b29 | 130 | AliMUONTrackExtrap::SetField(kField); |
8d0843c6 | 131 | } |
132 | ||
133 | //__________________________________________________________________________ | |
ea94c18b | 134 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 135 | { |
136 | /// Destructor for class AliMUONVTrackReconstructor | |
8d0843c6 | 137 | delete [] fNHitsForRecPerChamber; |
138 | delete [] fIndexOfFirstHitForRecPerChamber; | |
8d0843c6 | 139 | delete fHitsForRecPtr; |
ea94c18b | 140 | delete fRecTracksPtr; |
8d0843c6 | 141 | } |
142 | ||
ea94c18b | 143 | //__________________________________________________________________________ |
144 | void AliMUONVTrackReconstructor::ResetHitsForRec() | |
145 | { | |
146 | /// To reset the TClonesArray of HitsForRec, | |
147 | /// and the number of HitForRec and the index of the first HitForRec per chamber | |
148 | if (fHitsForRecPtr) fHitsForRecPtr->Clear("C"); | |
149 | fNHitsForRec = 0; | |
150 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
151 | fNHitsForRecPerChamber[ch] = 0; | |
152 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
153 | } | |
154 | } | |
155 | ||
156 | //__________________________________________________________________________ | |
157 | void AliMUONVTrackReconstructor::ResetTracks() | |
158 | { | |
159 | /// To reset the TClonesArray of reconstructed tracks | |
160 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
161 | fNRecTracks = 0; | |
162 | return; | |
163 | } | |
164 | ||
165 | //__________________________________________________________________________ | |
166 | void AliMUONVTrackReconstructor::EventReconstruct(const AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) | |
167 | { | |
168 | /// To reconstruct one event | |
169 | AliDebug(1,""); | |
b709ac13 | 170 | AliCodeTimerAuto(""); |
ea94c18b | 171 | |
172 | ResetTracks(); | |
173 | ResetHitsForRec(); | |
174 | AddHitsForRecFromRawClusters(clusterStore); | |
175 | MakeTracks(); | |
176 | ||
177 | // Add tracks to MUON data container | |
178 | for (Int_t i=0; i<fNRecTracks; ++i) | |
179 | { | |
180 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
181 | trackStore.Add(*track); | |
182 | } | |
183 | } | |
184 | ||
185 | //__________________________________________________________________________ | |
186 | void AliMUONVTrackReconstructor::AddHitsForRecFromRawClusters(const AliMUONVClusterStore& clusterStore) | |
7ec3b9cf | 187 | { |
188 | /// Build internal array of hit for rec from clusterStore | |
189 | ||
2060b217 | 190 | AliMUONVCluster* clus(0x0); |
7ec3b9cf | 191 | Int_t iclus(0); |
192 | ||
2060b217 | 193 | TIter next(clusterStore.CreateIterator()); |
194 | ||
195 | while ( ( clus = static_cast<AliMUONVCluster*>(next()) ) ) | |
7ec3b9cf | 196 | { |
197 | // new AliMUONHitForRec from raw cluster | |
198 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
199 | AliMUONHitForRec* hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
200 | fNHitsForRec++; | |
201 | // more information into HitForRec | |
2060b217 | 202 | hitForRec->SetNonBendingReso2(clus->GetErrX2()); |
203 | hitForRec->SetBendingReso2(clus->GetErrY2()); | |
7ec3b9cf | 204 | // original raw cluster |
205 | Int_t ch = AliMpDEManager::GetChamberId(clus->GetDetElemId()); | |
206 | hitForRec->SetChamberNumber(ch); | |
207 | hitForRec->SetHitNumber(iclus); | |
208 | // Z coordinate of the raw cluster (cm) | |
b709ac13 | 209 | hitForRec->SetZ(clus->GetZ()); |
7ec3b9cf | 210 | if (AliLog::GetDebugLevel("MUON","AliMUONTrackReconstructor") >= 3) { |
211 | cout << "Chamber " << ch <<" raw cluster " << iclus << " : " << endl; | |
212 | clus->Print("full"); | |
213 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
214 | hitForRec->Print("full"); | |
215 | } | |
216 | ++iclus; | |
217 | } // end of chamber loop | |
218 | ||
219 | SortHitsForRecWithIncreasingChamber(); | |
220 | ||
221 | AliDebug(1,"End of AddHitsForRecFromRawClusters"); | |
222 | ||
223 | if (AliLog::GetGlobalDebugLevel() > 0) | |
224 | { | |
225 | AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec)); | |
226 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
227 | { | |
228 | AliDebug(1, Form("Chamber(0...): %d",ch)); | |
229 | AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch])); | |
230 | AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch])); | |
231 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
232 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
233 | hit++) { | |
234 | AliDebug(1, Form("HitForRec index(0...): %d",hit)); | |
235 | ((*fHitsForRecPtr)[hit])->Dump(); | |
236 | } | |
237 | } | |
238 | } | |
239 | } | |
240 | ||
8d0843c6 | 241 | //__________________________________________________________________________ |
242 | void AliMUONVTrackReconstructor::SortHitsForRecWithIncreasingChamber() | |
243 | { | |
244 | /// Sort HitsForRec's in increasing order with respect to chamber number. | |
245 | /// Uses the function "Compare". | |
246 | /// Update the information for HitsForRec per chamber too. | |
247 | Int_t ch, nhits, prevch; | |
248 | fHitsForRecPtr->Sort(); | |
249 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
250 | fNHitsForRecPerChamber[ch] = 0; | |
251 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
252 | } | |
253 | prevch = 0; // previous chamber | |
254 | nhits = 0; // number of hits in current chamber | |
255 | // Loop over HitsForRec | |
256 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
257 | // chamber number (0...) | |
258 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
259 | // increment number of hits in current chamber | |
260 | (fNHitsForRecPerChamber[ch])++; | |
261 | // update index of first HitForRec in current chamber | |
262 | // if chamber number different from previous one | |
263 | if (ch != prevch) { | |
264 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
265 | prevch = ch; | |
266 | } | |
267 | } | |
268 | return; | |
269 | } | |
270 | ||
ea94c18b | 271 | //__________________________________________________________________________ |
272 | void AliMUONVTrackReconstructor::MakeTracks() | |
273 | { | |
274 | /// To make the tracks from the list of segments and points in all stations | |
275 | AliDebug(1,"Enter MakeTracks"); | |
276 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
277 | MakeTrackCandidates(); | |
278 | if (fRecTracksPtr->GetEntriesFast() == 0) return; | |
279 | // Follow tracks in stations(1..) 3, 2 and 1 | |
280 | FollowTracks(); | |
b709ac13 | 281 | // Complement the reconstructed tracks |
282 | if (fgkComplementTracks) ComplementTracks(); | |
ea94c18b | 283 | // Improve the reconstructed tracks |
284 | if (fgkImproveTracks) ImproveTracks(); | |
285 | // Remove double tracks | |
286 | RemoveDoubleTracks(); | |
287 | // Fill AliMUONTrack data members | |
288 | Finalize(); | |
289 | } | |
290 | ||
8d0843c6 | 291 | //__________________________________________________________________________ |
208f139e | 292 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(Int_t station) |
8d0843c6 | 293 | { |
208f139e | 294 | /// To make the list of segments in station(0..) "Station" from the list of hits to be reconstructed. |
295 | /// Return a new TClonesArray of segments. | |
296 | /// It is the responsibility of the user to delete it afterward. | |
297 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",station)); | |
298 | ||
8d0843c6 | 299 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; |
208f139e | 300 | AliMUONObjectPair *segment; |
22ccc301 | 301 | Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning |
7ec3b9cf | 302 | // first and second chambers (0...) in the station |
208f139e | 303 | Int_t ch1 = 2 * station; |
8d0843c6 | 304 | Int_t ch2 = ch1 + 1; |
7ec3b9cf | 305 | |
208f139e | 306 | // list of segments |
307 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", fNHitsForRecPerChamber[ch2]); | |
7ec3b9cf | 308 | segments->SetOwner(kTRUE); |
309 | ||
208f139e | 310 | // Loop over HitForRec's in the first chamber of the station |
8d0843c6 | 311 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; |
312 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
7ec3b9cf | 313 | hit1++) |
314 | { | |
8d0843c6 | 315 | // pointer to the HitForRec |
316 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
208f139e | 317 | // Loop over HitsForRec's in the second chamber of the station |
8d0843c6 | 318 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; |
7ec3b9cf | 319 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; |
320 | hit2++) | |
321 | { | |
8d0843c6 | 322 | // pointer to the HitForRec |
323 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
7ec3b9cf | 324 | if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0. ) |
325 | { | |
22ccc301 | 326 | // bending slope |
208f139e | 327 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / (hit1Ptr->GetZ() - hit2Ptr->GetZ()); |
328 | // impact parameter | |
329 | impactParam = hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope; | |
330 | // absolute value of bending momentum | |
7ec3b9cf | 331 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam)); |
332 | } else | |
333 | { | |
208f139e | 334 | AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): no segment created"); |
335 | continue; | |
336 | } | |
22ccc301 | 337 | // check for bending momentum within tolerances |
7ec3b9cf | 338 | if ((bendingMomentum < fMaxBendingMomentum) && (bendingMomentum > fMinBendingMomentum)) |
339 | { | |
340 | // make new segment | |
341 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(hit1Ptr, hit2Ptr, kFALSE, kFALSE); | |
342 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
343 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
344 | segment->Dump(); | |
345 | cout << "HitForRec in first chamber" << endl; | |
346 | hit1Ptr->Dump(); | |
347 | cout << "HitForRec in second chamber" << endl; | |
348 | hit2Ptr->Dump(); | |
349 | } | |
8d0843c6 | 350 | } |
351 | } //for (Int_t hit2 | |
352 | } // for (Int_t hit1... | |
208f139e | 353 | AliDebug(1,Form("Station: %d NSegments: %d ", station, segments->GetEntriesFast())); |
354 | return segments; | |
8d0843c6 | 355 | } |
356 | ||
ea94c18b | 357 | //__________________________________________________________________________ |
358 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
359 | { | |
360 | /// To remove identical tracks: | |
361 | /// Tracks are considered identical if they have all their hits in common. | |
362 | /// One keeps the track with the larger number of hits if need be | |
363 | AliMUONTrack *track1, *track2, *trackToRemove; | |
364 | Int_t hitsInCommon, nHits1, nHits2; | |
365 | Bool_t removedTrack1; | |
366 | // Loop over first track of the pair | |
367 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
368 | while (track1) { | |
369 | removedTrack1 = kFALSE; | |
370 | nHits1 = track1->GetNTrackHits(); | |
371 | // Loop over second track of the pair | |
372 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
373 | while (track2) { | |
374 | nHits2 = track2->GetNTrackHits(); | |
375 | // number of hits in common between two tracks | |
376 | hitsInCommon = track1->HitsInCommon(track2); | |
377 | // check for identical tracks | |
378 | if ((hitsInCommon == nHits1) || (hitsInCommon == nHits2)) { | |
379 | // decide which track to remove | |
380 | if (nHits2 > nHits1) { | |
381 | // remove track1 and continue the first loop with the track next to track1 | |
382 | trackToRemove = track1; | |
383 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
384 | fRecTracksPtr->Remove(trackToRemove); | |
385 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
386 | fNRecTracks--; | |
387 | removedTrack1 = kTRUE; | |
388 | break; | |
389 | } else { | |
390 | // remove track2 and continue the second loop with the track next to track2 | |
391 | trackToRemove = track2; | |
392 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
393 | fRecTracksPtr->Remove(trackToRemove); | |
394 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
395 | fNRecTracks--; | |
396 | } | |
397 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
398 | } // track2 | |
399 | if (removedTrack1) continue; | |
400 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
401 | } // track1 | |
402 | return; | |
403 | } | |
404 | ||
405 | //__________________________________________________________________________ | |
406 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
407 | { | |
408 | /// To remove double tracks: | |
409 | /// Tracks are considered identical if more than half of the hits of the track | |
410 | /// which has the smaller number of hits are in common with the other track. | |
411 | /// Among two identical tracks, one keeps the track with the larger number of hits | |
412 | /// or, if these numbers are equal, the track with the minimum chi2. | |
413 | AliMUONTrack *track1, *track2, *trackToRemove; | |
414 | Int_t hitsInCommon, nHits1, nHits2; | |
415 | Bool_t removedTrack1; | |
416 | // Loop over first track of the pair | |
417 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
418 | while (track1) { | |
419 | removedTrack1 = kFALSE; | |
420 | nHits1 = track1->GetNTrackHits(); | |
421 | // Loop over second track of the pair | |
422 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
423 | while (track2) { | |
424 | nHits2 = track2->GetNTrackHits(); | |
425 | // number of hits in common between two tracks | |
426 | hitsInCommon = track1->HitsInCommon(track2); | |
427 | // check for identical tracks | |
428 | if (((nHits1 < nHits2) && (2 * hitsInCommon > nHits1)) || (2 * hitsInCommon > nHits2)) { | |
429 | // decide which track to remove | |
430 | if ((nHits1 > nHits2) || ((nHits1 == nHits2) && (track1->GetFitFMin() <= track2->GetFitFMin()))) { | |
431 | // remove track2 and continue the second loop with the track next to track2 | |
432 | trackToRemove = track2; | |
433 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
434 | fRecTracksPtr->Remove(trackToRemove); | |
435 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
436 | fNRecTracks--; | |
437 | } else { | |
438 | // else remove track1 and continue the first loop with the track next to track1 | |
439 | trackToRemove = track1; | |
440 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
441 | fRecTracksPtr->Remove(trackToRemove); | |
442 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
443 | fNRecTracks--; | |
444 | removedTrack1 = kTRUE; | |
445 | break; | |
446 | } | |
447 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
448 | } // track2 | |
449 | if (removedTrack1) continue; | |
450 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
451 | } // track1 | |
452 | return; | |
453 | } | |
454 | ||
455 | //__________________________________________________________________________ | |
456 | Double_t AliMUONVTrackReconstructor::TryOneHitForRec(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec, | |
457 | AliMUONTrackParam &trackParamAtHit, Bool_t updatePropagator) | |
458 | { | |
459 | /// Test the compatibility between the track and the hitForRec (using trackParam's covariance matrix): | |
460 | /// return the corresponding Chi2 | |
461 | /// return trackParamAtHit | |
462 | ||
ea94c18b | 463 | // extrapolate track parameters and covariances at the z position of the tested hit |
019df241 | 464 | trackParamAtHit = trackParam; |
465 | AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtHit, hitForRec->GetZ(), updatePropagator); | |
ea94c18b | 466 | |
467 | // set pointer to hit into trackParamAtHit | |
468 | trackParamAtHit.SetHitForRecPtr(hitForRec); | |
469 | ||
470 | // Set differences between trackParam and hitForRec in the bending and non bending directions | |
019df241 | 471 | Double_t dX = hitForRec->GetNonBendingCoor() - trackParamAtHit.GetNonBendingCoor(); |
472 | Double_t dY = hitForRec->GetBendingCoor() - trackParamAtHit.GetBendingCoor(); | |
ea94c18b | 473 | |
019df241 | 474 | // Calculate errors and covariances |
ea94c18b | 475 | const TMatrixD& kParamCov = trackParamAtHit.GetCovariances(); |
019df241 | 476 | Double_t sigma2X = kParamCov(0,0) + hitForRec->GetNonBendingReso2(); |
477 | Double_t sigma2Y = kParamCov(2,2) + hitForRec->GetBendingReso2(); | |
478 | ||
479 | // Compute chi2 | |
480 | return dX * dX / sigma2X + dY * dY / sigma2Y; | |
481 | ||
482 | } | |
483 | ||
484 | //__________________________________________________________________________ | |
485 | Bool_t AliMUONVTrackReconstructor::TryOneHitForRecFast(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec) | |
486 | { | |
487 | /// Test the compatibility between the track and the hitForRec within a wide fix window | |
488 | /// assuming linear propagation of the track: | |
489 | /// return kTRUE if they are compatibles | |
490 | ||
491 | Double_t dZ = hitForRec->GetZ() - trackParam.GetZ(); | |
492 | Double_t dX = hitForRec->GetNonBendingCoor() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
493 | Double_t dY = hitForRec->GetBendingCoor() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
494 | ||
495 | if (TMath::Abs(dX) > fgkMaxTrackingDistanceNonBending || TMath::Abs(dY) > fgkMaxTrackingDistanceBending) return kFALSE; | |
496 | ||
497 | return kTRUE; | |
498 | ||
499 | } | |
500 | ||
501 | //__________________________________________________________________________ | |
502 | Double_t AliMUONVTrackReconstructor::TryTwoHitForRecFast(const AliMUONTrackParam &trackParamAtHit1, AliMUONHitForRec* hitForRec2, | |
503 | AliMUONTrackParam &trackParamAtHit2) | |
504 | { | |
505 | /// Test the compatibility between the track and the 2 hitForRec together (using trackParam's covariance matrix) | |
506 | /// assuming linear propagation between the two hits: | |
507 | /// return the corresponding Chi2 accounting for covariances between the 2 hitForRec | |
508 | /// return trackParamAtHit1 & 2 | |
509 | ||
510 | // extrapolate linearly track parameters at the z position of the second hit | |
511 | trackParamAtHit2 = trackParamAtHit1; | |
512 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtHit2, hitForRec2->GetZ()); | |
513 | ||
514 | // set pointer to hit2 into trackParamAtHit2 | |
515 | trackParamAtHit2.SetHitForRecPtr(hitForRec2); | |
516 | ||
517 | // Set differences between track and hitForRec in the bending and non bending directions | |
518 | AliMUONHitForRec* hitForRec1 = trackParamAtHit1.GetHitForRecPtr(); | |
519 | Double_t dX1 = hitForRec1->GetNonBendingCoor() - trackParamAtHit1.GetNonBendingCoor(); | |
520 | Double_t dX2 = hitForRec2->GetNonBendingCoor() - trackParamAtHit2.GetNonBendingCoor(); | |
521 | Double_t dY1 = hitForRec1->GetBendingCoor() - trackParamAtHit1.GetBendingCoor(); | |
522 | Double_t dY2 = hitForRec2->GetBendingCoor() - trackParamAtHit2.GetBendingCoor(); | |
523 | ||
524 | // Calculate errors and covariances | |
525 | const TMatrixD& kParamCov1 = trackParamAtHit1.GetCovariances(); | |
526 | const TMatrixD& kParamCov2 = trackParamAtHit2.GetCovariances(); | |
527 | Double_t dZ = trackParamAtHit2.GetZ() - trackParamAtHit1.GetZ(); | |
528 | Double_t sigma2X1 = kParamCov1(0,0) + hitForRec1->GetNonBendingReso2(); | |
529 | Double_t sigma2X2 = kParamCov2(0,0) + hitForRec2->GetNonBendingReso2(); | |
530 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); | |
531 | Double_t sigma2Y1 = kParamCov1(2,2) + hitForRec1->GetBendingReso2(); | |
532 | Double_t sigma2Y2 = kParamCov2(2,2) + hitForRec2->GetBendingReso2(); | |
533 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); | |
534 | ||
535 | // Compute chi2 | |
536 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
537 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
538 | if (detX == 0. || detY == 0.) return 1.e10; | |
539 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX | |
540 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
541 | ||
542 | } | |
543 | ||
544 | //__________________________________________________________________________ | |
545 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, Int_t nextStation) | |
546 | { | |
547 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible HitForRec(s) | |
548 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: | |
549 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
550 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
551 | /// Remove the obsolete "trackCandidate" at the end. | |
552 | /// kFALSE: add only the best hit(s) to the "trackCandidate". Try to add a couple of hits in priority. | |
553 | /// return kTRUE if new hits have been found (otherwise return kFALSE) | |
554 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); | |
555 | ||
556 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
557 | // - nextStation == station(1...) 5 => forward propagation | |
558 | // - nextStation < station(1...) 5 => backward propagation | |
559 | Int_t ch1, ch2; | |
560 | if (nextStation==4) { | |
561 | ch1 = 2*nextStation+1; | |
562 | ch2 = 2*nextStation; | |
ea94c18b | 563 | } else { |
019df241 | 564 | ch1 = 2*nextStation; |
565 | ch2 = 2*nextStation+1; | |
ea94c18b | 566 | } |
567 | ||
019df241 | 568 | Double_t chi2WithOneHitForRec = 1.e10; |
569 | Double_t chi2WithTwoHitForRec = 1.e10; | |
570 | Double_t maxChi2WithOneHitForRec = 2. * fgkSigmaToCutForTracking * fgkSigmaToCutForTracking; // 2 because 2 quantities in chi2 | |
571 | Double_t maxChi2WithTwoHitForRec = 4. * fgkSigmaToCutForTracking * fgkSigmaToCutForTracking; // 4 because 4 quantities in chi2 | |
572 | Double_t bestChi2WithOneHitForRec = maxChi2WithOneHitForRec; | |
573 | Double_t bestChi2WithTwoHitForRec = maxChi2WithTwoHitForRec; | |
574 | Bool_t foundOneHit = kFALSE; | |
575 | Bool_t foundTwoHits = kFALSE; | |
576 | AliMUONTrack *newTrack = 0x0; | |
577 | AliMUONHitForRec *hitForRecCh1, *hitForRecCh2; | |
578 | AliMUONTrackParam extrapTrackParamAtHit1; | |
579 | AliMUONTrackParam extrapTrackParamAtHit2; | |
580 | AliMUONTrackParam bestTrackParamAtHit1; | |
581 | AliMUONTrackParam bestTrackParamAtHit2; | |
582 | Bool_t *hitForRecCh1Used = new Bool_t[fNHitsForRecPerChamber[ch1]]; | |
583 | for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) hitForRecCh1Used[hit1] = kFALSE; | |
584 | ||
585 | // Get track parameters | |
586 | AliMUONTrackParam trackParam(*(AliMUONTrackParam*)trackCandidate.GetTrackParamAtHit()->First()); | |
587 | ||
588 | // Add MCS effect | |
589 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
590 | ||
591 | // Printout for debuging | |
592 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
593 | cout << "FollowLinearTrackInStation: look for hits in chamber(1..): " << ch2+1 << endl; | |
594 | } | |
595 | ||
596 | // look for candidates in chamber 2 | |
597 | for (Int_t hit2 = 0; hit2 < fNHitsForRecPerChamber[ch2]; hit2++) { | |
598 | ||
599 | hitForRecCh2 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch2]+hit2); | |
600 | ||
601 | // try to add the current hit fast | |
602 | if (!TryOneHitForRecFast(trackParam, hitForRecCh2)) continue; | |
603 | ||
604 | // try to add the current hit accuratly | |
605 | extrapTrackParamAtHit2 = trackParam; | |
606 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit2, hitForRecCh2->GetZ()); | |
607 | chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit2, hitForRecCh2, extrapTrackParamAtHit2); | |
608 | ||
609 | // if good chi2 then try to attach a hitForRec in the other chamber too | |
610 | if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) { | |
611 | Bool_t foundSecondHit = kFALSE; | |
612 | ||
613 | // Printout for debuging | |
614 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
615 | cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch2+1 | |
616 | << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl; | |
617 | cout << " look for second hits in chamber(1..): " << ch1+1 << " ..." << endl; | |
618 | } | |
619 | ||
620 | // add MCS effect | |
621 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtHit2,AliMUONConstants::ChamberThicknessInX0(),1.); | |
622 | ||
623 | for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) { | |
624 | ||
625 | hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1); | |
626 | ||
627 | // try to add the current hit fast | |
628 | if (!TryOneHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1)) continue; | |
629 | ||
630 | // try to add the current hit in addition to the one found on the previous chamber | |
631 | chi2WithTwoHitForRec = TryTwoHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1, extrapTrackParamAtHit1); | |
632 | ||
633 | // if good chi2 then consider to add the 2 hitForRec to the "trackCandidate" | |
634 | if (chi2WithTwoHitForRec < maxChi2WithTwoHitForRec) { | |
635 | foundSecondHit = kTRUE; | |
636 | foundTwoHits = kTRUE; | |
637 | ||
638 | // Printout for debuging | |
639 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
640 | cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1 | |
641 | << " (Chi2 = " << chi2WithTwoHitForRec << ")" << endl; | |
642 | } | |
643 | ||
644 | if (fgkTrackAllTracks) { | |
645 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's | |
646 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
647 | extrapTrackParamAtHit1.SetRemovable(kTRUE); | |
648 | newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1); | |
649 | extrapTrackParamAtHit2.SetRemovable(kTRUE); | |
650 | newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2); | |
651 | newTrack->GetTrackParamAtHit()->Sort(); | |
652 | fNRecTracks++; | |
653 | ||
654 | // Tag hitForRecCh1 as used | |
655 | hitForRecCh1Used[hit1] = kTRUE; | |
656 | ||
657 | // Printout for debuging | |
658 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
659 | cout << "FollowLinearTrackInStation: added two hits in station(1..): " << nextStation+1 << endl; | |
660 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
661 | } | |
662 | ||
663 | } else if (chi2WithTwoHitForRec < bestChi2WithTwoHitForRec) { | |
664 | // keep track of the best couple of hits | |
665 | bestChi2WithTwoHitForRec = chi2WithTwoHitForRec; | |
666 | bestTrackParamAtHit1 = extrapTrackParamAtHit1; | |
667 | bestTrackParamAtHit2 = extrapTrackParamAtHit2; | |
668 | } | |
669 | ||
670 | } | |
671 | ||
672 | } | |
673 | ||
674 | // if no hitForRecCh1 found then consider to add hitForRecCh2 only | |
675 | if (!foundSecondHit) { | |
676 | foundOneHit = kTRUE; | |
677 | ||
678 | if (fgkTrackAllTracks) { | |
679 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's | |
680 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
681 | extrapTrackParamAtHit2.SetRemovable(kFALSE); | |
682 | newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2); | |
683 | newTrack->GetTrackParamAtHit()->Sort(); | |
684 | fNRecTracks++; | |
685 | ||
686 | // Printout for debuging | |
687 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
688 | cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch2+1 << endl; | |
689 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
690 | } | |
691 | ||
692 | } else if (!foundTwoHits && chi2WithOneHitForRec < bestChi2WithOneHitForRec) { | |
693 | // keep track of the best single hitForRec except if a couple of hits has already been found | |
694 | bestChi2WithOneHitForRec = chi2WithOneHitForRec; | |
695 | bestTrackParamAtHit1 = extrapTrackParamAtHit2; | |
696 | } | |
697 | ||
698 | } | |
699 | ||
700 | } | |
701 | ||
702 | } | |
703 | ||
704 | // look for candidates in chamber 1 not already attached to a track | |
705 | // if we want to keep all possible tracks or if no good couple of hitForRec has been found | |
706 | if (fgkTrackAllTracks || !foundTwoHits) { | |
707 | ||
708 | // Printout for debuging | |
709 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
710 | cout << "FollowLinearTrackInStation: look for single hits in chamber(1..): " << ch1+1 << endl; | |
711 | } | |
712 | ||
713 | //Extrapolate trackCandidate to chamber "ch2" | |
714 | AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); | |
715 | ||
716 | // add MCS effect for next step | |
717 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.); | |
718 | ||
719 | for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) { | |
720 | ||
721 | hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1); | |
722 | ||
723 | if (hitForRecCh1Used[hit1]) continue; // Skip hitForRec already used | |
724 | ||
725 | // try to add the current hit fast | |
726 | if (!TryOneHitForRecFast(trackParam, hitForRecCh1)) continue; | |
727 | ||
728 | // try to add the current hit accuratly | |
729 | extrapTrackParamAtHit1 = trackParam; | |
730 | AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit1, hitForRecCh1->GetZ()); | |
731 | chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit1, hitForRecCh1, extrapTrackParamAtHit1); | |
732 | ||
733 | // if good chi2 then consider to add hitForRecCh1 | |
734 | // We do not try to attach a hitForRec in the other chamber too since it has already been done above | |
735 | if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) { | |
736 | foundOneHit = kTRUE; | |
737 | ||
738 | // Printout for debuging | |
739 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
740 | cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1 | |
741 | << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl; | |
742 | } | |
743 | ||
744 | if (fgkTrackAllTracks) { | |
745 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's | |
746 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
747 | extrapTrackParamAtHit1.SetRemovable(kFALSE); | |
748 | newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1); | |
749 | newTrack->GetTrackParamAtHit()->Sort(); | |
750 | fNRecTracks++; | |
751 | ||
752 | // Printout for debuging | |
753 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
754 | cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch1+1 << endl; | |
755 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
756 | } | |
757 | ||
758 | } else if (chi2WithOneHitForRec < bestChi2WithOneHitForRec) { | |
759 | // keep track of the best single hitForRec except if a couple of hits has already been found | |
760 | bestChi2WithOneHitForRec = chi2WithOneHitForRec; | |
761 | bestTrackParamAtHit1 = extrapTrackParamAtHit1; | |
762 | } | |
763 | ||
764 | } | |
765 | ||
766 | } | |
767 | ||
768 | } | |
769 | ||
770 | // fill out the best track if required else clean up the fRecTracksPtr array | |
771 | if (!fgkTrackAllTracks) { | |
772 | if (foundTwoHits) { | |
773 | bestTrackParamAtHit1.SetRemovable(kTRUE); | |
774 | trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr()); | |
775 | bestTrackParamAtHit2.SetRemovable(kTRUE); | |
776 | trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit2,bestTrackParamAtHit2.GetHitForRecPtr()); | |
777 | trackCandidate.GetTrackParamAtHit()->Sort(); | |
778 | ||
779 | // Printout for debuging | |
780 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
781 | cout << "FollowLinearTrackInStation: added the two best hits in station(1..): " << nextStation+1 << endl; | |
782 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
783 | } | |
784 | ||
785 | } else if (foundOneHit) { | |
786 | bestTrackParamAtHit1.SetRemovable(kFALSE); | |
787 | trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr()); | |
788 | trackCandidate.GetTrackParamAtHit()->Sort(); | |
789 | ||
790 | // Printout for debuging | |
791 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
792 | cout << "FollowLinearTrackInStation: added the best hit in chamber(1..): " << bestTrackParamAtHit1.GetHitForRecPtr()->GetChamberNumber()+1 << endl; | |
793 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
794 | } | |
795 | ||
dd230855 | 796 | } else { |
797 | delete [] hitForRecCh1Used; | |
798 | return kFALSE; | |
799 | } | |
019df241 | 800 | |
801 | } else if (foundOneHit || foundTwoHits) { | |
802 | ||
803 | // remove obsolete track | |
804 | fRecTracksPtr->Remove(&trackCandidate); | |
805 | fNRecTracks--; | |
806 | ||
dd230855 | 807 | } else { |
808 | delete [] hitForRecCh1Used; | |
809 | return kFALSE; | |
810 | } | |
ea94c18b | 811 | |
dd230855 | 812 | delete [] hitForRecCh1Used; |
019df241 | 813 | return kTRUE; |
ea94c18b | 814 | |
815 | } | |
816 | ||
817 | //__________________________________________________________________________ | |
7ec3b9cf | 818 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
819 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
820 | const AliMUONVTriggerStore& triggerStore, | |
821 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 822 | { |
823 | /// Try to match track from tracking system with trigger track | |
b709ac13 | 824 | AliCodeTimerAuto(""); |
825 | ||
06ca6d7b | 826 | static const Double_t kDistSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY |
208f139e | 827 | |
7771752e | 828 | Int_t matchTrigger; |
7ec3b9cf | 829 | Int_t loTrgNum(-1); |
8d0843c6 | 830 | Double_t distTriggerTrack[3]; |
208f139e | 831 | Double_t xTrack, yTrack, ySlopeTrack, chi2MatchTrigger, minChi2MatchTrigger, chi2; |
7ec3b9cf | 832 | |
833 | TIter itTrack(trackStore.CreateIterator()); | |
834 | AliMUONTrack* track; | |
8d0843c6 | 835 | |
7ec3b9cf | 836 | while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) ) |
837 | { | |
423b32ca | 838 | matchTrigger = 0; |
8d0843c6 | 839 | chi2MatchTrigger = 0.; |
c6ba19f7 | 840 | loTrgNum = -1; |
7771752e | 841 | Int_t doubleMatch=-1; // Check if track matches 2 trigger tracks |
842 | Double_t doubleChi2 = -1.; | |
7ec3b9cf | 843 | |
844 | AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtHit()->Last()))); | |
37827b29 | 845 | AliMUONTrackExtrap::ExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber |
8d0843c6 | 846 | |
847 | xTrack = trackParam.GetNonBendingCoor(); | |
848 | yTrack = trackParam.GetBendingCoor(); | |
849 | ySlopeTrack = trackParam.GetBendingSlope(); | |
208f139e | 850 | minChi2MatchTrigger = 999.; |
7ec3b9cf | 851 | |
852 | AliMUONTriggerTrack *triggerTrack; | |
853 | TIter itTriggerTrack(triggerTrackStore.CreateIterator()); | |
854 | while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ) | |
855 | { | |
06ca6d7b | 856 | distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/kDistSigma[0]; |
857 | distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/kDistSigma[1]; | |
858 | distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/kDistSigma[2]; | |
208f139e | 859 | chi2 = 0.; |
860 | for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]; | |
861 | chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY) | |
7ec3b9cf | 862 | if (chi2 < fMaxNormChi2MatchTrigger) |
863 | { | |
864 | Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.); | |
865 | if (chi2 < minChi2MatchTrigger && chi2 < fMaxNormChi2MatchTrigger) | |
866 | { | |
867 | if(isDoubleTrack) | |
868 | { | |
869 | doubleMatch = loTrgNum; | |
870 | doubleChi2 = chi2MatchTrigger; | |
871 | } | |
872 | minChi2MatchTrigger = chi2; | |
873 | chi2MatchTrigger = chi2; | |
874 | loTrgNum = triggerTrack->GetLoTrgNum(); | |
875 | AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum); | |
876 | matchTrigger=1; | |
877 | if(locTrg->LoLpt()>0)matchTrigger=2; | |
878 | if(locTrg->LoHpt()>0)matchTrigger=3; | |
879 | } | |
880 | else if(isDoubleTrack) | |
881 | { | |
882 | doubleMatch = triggerTrack->GetLoTrgNum(); | |
883 | doubleChi2 = chi2; | |
884 | } | |
8d0843c6 | 885 | } |
8d0843c6 | 886 | } |
7ec3b9cf | 887 | if(doubleMatch>=0) |
888 | { // If two trigger tracks match, select the one passing more trigger cuts | |
889 | AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch)); | |
890 | AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch); | |
891 | if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3)) | |
892 | { | |
893 | if(locTrg1->LoHpt()>0)matchTrigger=3; | |
894 | else matchTrigger=2; | |
895 | loTrgNum = doubleMatch; | |
896 | chi2MatchTrigger=doubleChi2; | |
897 | } | |
7771752e | 898 | } |
8d0843c6 | 899 | |
900 | track->SetMatchTrigger(matchTrigger); | |
c6ba19f7 | 901 | track->SetLoTrgNum(loTrgNum); |
8d0843c6 | 902 | track->SetChi2MatchTrigger(chi2MatchTrigger); |
7ec3b9cf | 903 | |
904 | AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum)); | |
905 | ||
906 | if (locTrg) | |
907 | { | |
908 | track->SetLocalTrigger(locTrg->LoCircuit(), | |
909 | locTrg->LoStripX(), | |
910 | locTrg->LoStripY(), | |
911 | locTrg->LoDev(), | |
912 | locTrg->LoLpt(), | |
913 | locTrg->LoHpt()); | |
914 | } | |
915 | } | |
916 | ||
917 | trackHitPattern.GetHitPattern(trackStore,triggerStore); | |
8d0843c6 | 918 | } |
919 | ||
ea94c18b | 920 | //__________________________________________________________________________ |
921 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
922 | const AliMUONVTriggerStore& triggerStore, | |
923 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 924 | { |
71a2d3aa | 925 | /// To make the trigger tracks from Local Trigger |
7ec3b9cf | 926 | AliDebug(1, ""); |
b709ac13 | 927 | AliCodeTimerAuto(""); |
7ec3b9cf | 928 | |
929 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); | |
e6b25a6e | 930 | |
7ec3b9cf | 931 | UChar_t gloTrigPat = 0; |
e6b25a6e | 932 | |
7ec3b9cf | 933 | if (globalTrigger) |
934 | { | |
935 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 936 | } |
937 | ||
7ec3b9cf | 938 | TIter next(triggerStore.CreateIterator()); |
939 | AliMUONLocalTrigger* locTrg(0x0); | |
8d0843c6 | 940 | |
e6b25a6e | 941 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
942 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
7cf63da6 | 943 | |
7ec3b9cf | 944 | AliMUONTriggerTrack triggerTrack; |
945 | ||
946 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
947 | { | |
948 | Bool_t xTrig=kFALSE; | |
949 | Bool_t yTrig=kFALSE; | |
950 | ||
32ab62c9 | 951 | Int_t localBoardId = locTrg->LoCircuit(); |
7ec3b9cf | 952 | if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 && |
953 | locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X | |
954 | else xTrig=kTRUE; // trigger in X | |
955 | if (locTrg->LoTrigY()==1 && | |
956 | locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y | |
957 | else yTrig = kTRUE; // trigger in Y | |
958 | ||
959 | if (xTrig && yTrig) | |
960 | { // make Trigger Track if trigger in X and Y | |
8b0baca4 | 961 | |
32ab62c9 | 962 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); |
7ec3b9cf | 963 | // need first to convert deviation to [0-30] |
964 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
965 | Int_t deviation = locTrg->LoDev(); | |
966 | Int_t sign = 0; | |
967 | if ( !locTrg->LoSdev() && deviation ) sign=-1; | |
968 | if ( !locTrg->LoSdev() && !deviation ) sign= 0; | |
969 | if ( locTrg->LoSdev() == 1 ) sign=+1; | |
970 | deviation *= sign; | |
971 | deviation += 15; | |
972 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; | |
32ab62c9 | 973 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); |
974 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); | |
7ec3b9cf | 975 | |
976 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(), | |
977 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
978 | ||
979 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
980 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
981 | ||
982 | triggerTrack.SetX11(x11); | |
983 | triggerTrack.SetY11(y11); | |
984 | triggerTrack.SetThetax(thetax); | |
985 | triggerTrack.SetThetay(thetay); | |
986 | triggerTrack.SetGTPattern(gloTrigPat); | |
32ab62c9 | 987 | triggerTrack.SetLoTrgNum(localBoardId); |
7ec3b9cf | 988 | |
989 | triggerTrackStore.Add(triggerTrack); | |
990 | } // board is fired | |
e6b25a6e | 991 | } // end of loop on Local Trigger |
8d0843c6 | 992 | } |
ea94c18b | 993 |