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