]>
Commit | Line | Data |
---|---|---|
8d0843c6 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
c4ee792d | 19 | /// \class AliMUONVTrackReconstructor |
06ca6d7b | 20 | /// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
21 | /// | |
96ebe67e | 22 | /// This class contains as data a pointer to the array of reconstructed tracks |
06ca6d7b | 23 | /// |
24 | /// It contains as methods, among others: | |
25 | /// * EventReconstruct to build the muon tracks | |
26 | /// * EventReconstructTrigger to build the trigger tracks | |
96ebe67e | 27 | /// * ValidateTracksWithTrigger to match tracker/trigger tracks |
06ca6d7b | 28 | /// |
96ebe67e | 29 | /// Several options and adjustable parameters are available for both KALMAN and ORIGINAL |
ad3c6eda | 30 | /// tracking algorithms. They can be changed through the AliMUONRecoParam object |
31 | /// set in the reconstruction macro or read from the CDB | |
32 | /// (see methods in AliMUONRecoParam.h file for details) | |
96ebe67e | 33 | /// |
34 | /// Main parameters and options are: | |
dfb547bf | 35 | /// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be |
36 | /// attached to the track candidate and to select good tracks. | |
019df241 | 37 | /// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates |
38 | /// are made assuming linear propagation between stations 4 and 5. | |
dfb547bf | 39 | /// - *fgkTrackAllTracks* : according to the value of this flag, in case that several |
40 | /// new clusters pass the quality cut, either we consider all the possibilities | |
41 | /// (duplicating tracks) or we attach only the best cluster. | |
42 | /// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks | |
43 | /// lost during the tracking by removing the worst of the 2 clusters attached in the | |
44 | /// previous station. | |
45 | /// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality | |
46 | /// of the tracks at the end of the tracking by removing clusters that do not pass | |
3304fa09 | 47 | /// new quality cut (the track is removed is it does not contain enough cluster anymore). |
48 | /// - *fgkComplementTracks* : if this flag is set to 'true', we try to improve the quality | |
49 | /// of the tracks at the end of the tracking by adding potentially missing clusters | |
50 | /// (we may have 2 clusters in the same chamber because of the overlapping of detection | |
51 | /// elements, which is not handle by the tracking algorithm). | |
dfb547bf | 52 | /// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the |
53 | /// quality of the tracks. | |
54 | /// | |
c4ee792d | 55 | /// \author Philippe Pillot |
3d1463c8 | 56 | //----------------------------------------------------------------------------- |
8d0843c6 | 57 | |
8d0843c6 | 58 | #include "AliMUONVTrackReconstructor.h" |
7ec3b9cf | 59 | |
8d0843c6 | 60 | #include "AliMUONConstants.h" |
208f139e | 61 | #include "AliMUONObjectPair.h" |
8d0843c6 | 62 | #include "AliMUONTriggerTrack.h" |
e1a10d41 | 63 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 64 | #include "AliMUONLocalTrigger.h" |
65 | #include "AliMUONGlobalTrigger.h" | |
8d0843c6 | 66 | #include "AliMUONTrack.h" |
37827b29 | 67 | #include "AliMUONTrackParam.h" |
68 | #include "AliMUONTrackExtrap.h" | |
7771752e | 69 | #include "AliMUONTrackHitPattern.h" |
7ec3b9cf | 70 | #include "AliMUONVTrackStore.h" |
71 | #include "AliMUONVClusterStore.h" | |
2060b217 | 72 | #include "AliMUONVCluster.h" |
1fef78c8 | 73 | #include "AliMUONVClusterServer.h" |
7ec3b9cf | 74 | #include "AliMUONVTriggerStore.h" |
75 | #include "AliMUONVTriggerTrackStore.h" | |
5a240757 | 76 | #include "AliMUONRecoParam.h" |
77 | ||
ea94c18b | 78 | #include "AliMpDEManager.h" |
1fef78c8 | 79 | #include "AliMpArea.h" |
ea94c18b | 80 | |
bdfb6eef | 81 | #include "AliMpDDLStore.h" |
82 | #include "AliMpVSegmentation.h" | |
83 | #include "AliMpSegmentation.h" | |
84 | #include "AliMpPad.h" | |
85 | ||
ea94c18b | 86 | #include "AliLog.h" |
b709ac13 | 87 | #include "AliCodeTimer.h" |
ea94c18b | 88 | #include "AliTracker.h" |
8d0843c6 | 89 | |
4889d34c | 90 | #include <TClonesArray.h> |
91 | #include <TMath.h> | |
ea94c18b | 92 | #include <TMatrixD.h> |
1fef78c8 | 93 | #include <TVector2.h> |
ea94c18b | 94 | |
95 | #include <Riostream.h> | |
4889d34c | 96 | |
78649106 | 97 | /// \cond CLASSIMP |
8d0843c6 | 98 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context |
78649106 | 99 | /// \endcond |
8d0843c6 | 100 | |
ea94c18b | 101 | //__________________________________________________________________________ |
a0dc65b4 | 102 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(const AliMUONRecoParam* recoParam, |
103 | AliMUONVClusterServer* clusterServer) | |
104 | : TObject(), | |
105 | fRecTracksPtr(0x0), | |
106 | fNRecTracks(0), | |
107 | fClusterServer(clusterServer), | |
6b191dea | 108 | fkRecoParam(recoParam), |
4663da9f | 109 | fMaxMCSAngle2(0x0) |
8d0843c6 | 110 | { |
111 | /// Constructor for class AliMUONVTrackReconstructor | |
b1fea02e | 112 | /// WARNING: if clusterServer=0x0, no clusterization will be possible at this level |
ea94c18b | 113 | |
114 | // Memory allocation for the TClonesArray of reconstructed tracks | |
96ebe67e | 115 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 100); |
7ec3b9cf | 116 | |
208f139e | 117 | // set the magnetic field for track extrapolations |
f7a1cc68 | 118 | AliMUONTrackExtrap::SetField(); |
6b191dea | 119 | |
120 | // set the maximum MCS angle in chamber from the minimum acceptable momentum | |
121 | AliMUONTrackParam param; | |
122 | Double_t inverseBendingP = (GetRecoParam()->GetMinBendingMomentum() > 0.) ? 1./GetRecoParam()->GetMinBendingMomentum() : 1.; | |
123 | param.SetInverseBendingMomentum(inverseBendingP); | |
4663da9f | 124 | fMaxMCSAngle2 = new Double_t [AliMUONConstants::NTrackingCh()]; |
125 | for (Int_t iCh=0; iCh<AliMUONConstants::NTrackingCh(); iCh++) | |
126 | fMaxMCSAngle2[iCh] = AliMUONTrackExtrap::GetMCSAngle2(param, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
6b191dea | 127 | |
8d0843c6 | 128 | } |
129 | ||
130 | //__________________________________________________________________________ | |
ea94c18b | 131 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor() |
8d0843c6 | 132 | { |
133 | /// Destructor for class AliMUONVTrackReconstructor | |
ea94c18b | 134 | delete fRecTracksPtr; |
4663da9f | 135 | delete[] fMaxMCSAngle2; |
8d0843c6 | 136 | } |
137 | ||
ea94c18b | 138 | //__________________________________________________________________________ |
139 | void AliMUONVTrackReconstructor::ResetTracks() | |
140 | { | |
141 | /// To reset the TClonesArray of reconstructed tracks | |
142 | if (fRecTracksPtr) fRecTracksPtr->Clear("C"); | |
143 | fNRecTracks = 0; | |
144 | return; | |
145 | } | |
146 | ||
147 | //__________________________________________________________________________ | |
1fef78c8 | 148 | void AliMUONVTrackReconstructor::EventReconstruct(AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore) |
ea94c18b | 149 | { |
150 | /// To reconstruct one event | |
151 | AliDebug(1,""); | |
99c136e1 | 152 | AliCodeTimerAuto("",0); |
ea94c18b | 153 | |
96ebe67e | 154 | // Reset array of tracks |
ea94c18b | 155 | ResetTracks(); |
2060b217 | 156 | |
89c8d66d | 157 | // Look for candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
158 | if (!MakeTrackCandidates(clusterStore)) return; | |
96ebe67e | 159 | |
89c8d66d | 160 | // Look for extra candidates from clusters in stations(1..) 4 and 5 (abort in case of failure) |
161 | if (GetRecoParam()->MakeMoreTrackCandidates()) { | |
162 | if (!MakeMoreTrackCandidates(clusterStore)) return; | |
163 | } | |
9bf6860b | 164 | |
96ebe67e | 165 | // Stop tracking if no candidate found |
ea94c18b | 166 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
96ebe67e | 167 | |
89c8d66d | 168 | // Follow tracks in stations(1..) 3, 2 and 1 (abort in case of failure) |
169 | if (!FollowTracks(clusterStore)) return; | |
96ebe67e | 170 | |
b709ac13 | 171 | // Complement the reconstructed tracks |
89c8d66d | 172 | if (GetRecoParam()->ComplementTracks()) { |
173 | if (ComplementTracks(clusterStore)) RemoveIdenticalTracks(); | |
174 | } | |
96ebe67e | 175 | |
ea94c18b | 176 | // Improve the reconstructed tracks |
a0dc65b4 | 177 | if (GetRecoParam()->ImproveTracks()) ImproveTracks(); |
96ebe67e | 178 | |
c59f70b9 | 179 | // Remove connected tracks |
180 | if (GetRecoParam()->RemoveConnectedTracksInSt12()) RemoveConnectedTracks(kFALSE); | |
181 | else RemoveConnectedTracks(kTRUE); | |
96ebe67e | 182 | |
ea94c18b | 183 | // Fill AliMUONTrack data members |
184 | Finalize(); | |
96ebe67e | 185 | |
186 | // Add tracks to MUON data container | |
187 | for (Int_t i=0; i<fNRecTracks; ++i) | |
188 | { | |
189 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
4ea3f013 | 190 | if (track->GetGlobalChi2() < AliMUONTrack::MaxChi2()) { |
191 | track->SetUniqueID(i+1); | |
192 | trackStore.Add(*track); | |
193 | } else AliWarning("problem occur somewhere during track refitting --> discard track"); | |
96ebe67e | 194 | } |
ea94c18b | 195 | } |
196 | ||
6b191dea | 197 | //__________________________________________________________________________ |
198 | Bool_t AliMUONVTrackReconstructor::IsAcceptable(AliMUONTrackParam &trackParam) | |
199 | { | |
200 | /// Return kTRUE if the track is within given limits on momentum/angle/origin | |
201 | ||
202 | const TMatrixD& kParamCov = trackParam.GetCovariances(); | |
203 | Int_t chamber = trackParam.GetClusterPtr()->GetChamberId(); | |
204 | Double_t z = trackParam.GetZ(); | |
205 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); | |
206 | ||
207 | // MCS dipersion | |
208 | Double_t angleMCS2 = 0.; | |
6b191dea | 209 | Double_t impactMCS2 = 0.; |
4663da9f | 210 | if (AliMUONTrackExtrap::IsFieldON() && chamber < 6) { |
211 | ||
212 | // track momentum is known | |
213 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
214 | Double_t localMCS2 = AliMUONTrackExtrap::GetMCSAngle2(trackParam, AliMUONConstants::ChamberThicknessInX0(iCh), 1.); | |
215 | angleMCS2 += localMCS2; | |
216 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * localMCS2; | |
217 | } | |
218 | ||
219 | } else { | |
220 | ||
221 | // track momentum is unknown | |
222 | for (Int_t iCh=0; iCh<=chamber; iCh++) { | |
223 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
224 | impactMCS2 += AliMUONConstants::DefaultChamberZ(chamber) * AliMUONConstants::DefaultChamberZ(chamber) * fMaxMCSAngle2[iCh]; | |
225 | } | |
226 | ||
227 | } | |
6b191dea | 228 | |
229 | // ------ track selection in non bending direction ------ | |
230 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
231 | ||
232 | // check if non bending slope is within tolerances | |
4663da9f | 233 | Double_t nonBendingSlopeErr = TMath::Sqrt(kParamCov(1,1) + angleMCS2); |
6b191dea | 234 | if ((TMath::Abs(trackParam.GetNonBendingSlope()) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) return kFALSE; |
235 | ||
236 | } else { | |
237 | ||
238 | // or check if non bending impact parameter is within tolerances | |
239 | Double_t nonBendingImpactParam = TMath::Abs(trackParam.GetNonBendingCoor() - z * trackParam.GetNonBendingSlope()); | |
240 | Double_t nonBendingImpactParamErr = TMath::Sqrt(kParamCov(0,0) + z * z * kParamCov(1,1) - 2. * z * kParamCov(0,1) + impactMCS2); | |
241 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) return kFALSE; | |
242 | ||
243 | } | |
244 | ||
245 | // ------ track selection in bending direction ------ | |
246 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
247 | ||
248 | // check if bending momentum is within tolerances | |
249 | Double_t bendingMomentum = TMath::Abs(1. / trackParam.GetInverseBendingMomentum()); | |
250 | Double_t bendingMomentumErr = TMath::Sqrt(kParamCov(4,4)) * bendingMomentum * bendingMomentum; | |
251 | if (chamber < 6 && (bendingMomentum + sigmaCut * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
252 | else if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) return kFALSE; | |
253 | ||
254 | } else { | |
255 | ||
256 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
257 | ||
258 | // check if bending slope is within tolerances | |
4663da9f | 259 | Double_t bendingSlopeErr = TMath::Sqrt(kParamCov(3,3) + angleMCS2); |
6b191dea | 260 | if ((TMath::Abs(trackParam.GetBendingSlope()) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) return kFALSE; |
261 | ||
262 | } else { | |
263 | ||
264 | // or check if bending impact parameter is within tolerances | |
265 | Double_t bendingImpactParam = TMath::Abs(trackParam.GetBendingCoor() - z * trackParam.GetBendingSlope()); | |
266 | Double_t bendingImpactParamErr = TMath::Sqrt(kParamCov(2,2) + z * z * kParamCov(3,3) - 2. * z * kParamCov(2,3) + impactMCS2); | |
267 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) return kFALSE; | |
268 | ||
269 | } | |
270 | ||
271 | } | |
272 | ||
273 | return kTRUE; | |
274 | ||
275 | } | |
276 | ||
277 | //__________________________________________________________________________ | |
9bf6860b | 278 | TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsBetweenChambers(const AliMUONVClusterStore& clusterStore, Int_t ch1, Int_t ch2) |
8d0843c6 | 279 | { |
9bf6860b | 280 | /// To make the list of segments from the list of clusters in the 2 given chambers. |
208f139e | 281 | /// Return a new TClonesArray of segments. |
282 | /// It is the responsibility of the user to delete it afterward. | |
9bf6860b | 283 | AliDebug(1,Form("Enter MakeSegmentsBetweenChambers (1..) %d-%d", ch1+1, ch2+1)); |
99c136e1 | 284 | AliCodeTimerAuto("",0); |
208f139e | 285 | |
96ebe67e | 286 | AliMUONVCluster *cluster1, *cluster2; |
208f139e | 287 | AliMUONObjectPair *segment; |
6b191dea | 288 | Double_t z1 = 0., z2 = 0., dZ = 0.; |
289 | Double_t nonBendingSlope = 0., nonBendingSlopeErr = 0., nonBendingImpactParam = 0., nonBendingImpactParamErr = 0.; | |
290 | Double_t bendingSlope = 0., bendingSlopeErr = 0., bendingImpactParam = 0., bendingImpactParamErr = 0., bendingImpactParamErr2 = 0.; | |
291 | Double_t bendingMomentum = 0., bendingMomentumErr = 0.; | |
292 | Double_t bendingVertexDispersion2 = GetRecoParam()->GetBendingVertexDispersion() * GetRecoParam()->GetBendingVertexDispersion(); | |
4663da9f | 293 | Double_t angleMCS2 = 0.; // maximum angular dispersion**2 due to MCS in chamber |
294 | Double_t impactMCS2 = 0.; // maximum impact parameter dispersion**2 due to MCS in chamber | |
295 | for (Int_t iCh=0; iCh<=ch1; iCh++) { | |
296 | angleMCS2 += fMaxMCSAngle2[iCh]; | |
297 | impactMCS2 += AliMUONConstants::DefaultChamberZ(iCh) * AliMUONConstants::DefaultChamberZ(iCh) * fMaxMCSAngle2[iCh]; | |
298 | } | |
6b191dea | 299 | Double_t sigmaCut = GetRecoParam()->GetSigmaCutForTracking(); |
7ec3b9cf | 300 | |
96ebe67e | 301 | // Create iterators to loop over clusters in both chambers |
302 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
303 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
304 | ||
208f139e | 305 | // list of segments |
96ebe67e | 306 | TClonesArray *segments = new TClonesArray("AliMUONObjectPair", 100); |
7ec3b9cf | 307 | |
96ebe67e | 308 | // Loop over clusters in the first chamber of the station |
309 | while ( ( cluster1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
6b191dea | 310 | z1 = cluster1->GetZ(); |
96ebe67e | 311 | |
312 | // reset cluster iterator of chamber 2 | |
313 | nextInCh2.Reset(); | |
314 | ||
315 | // Loop over clusters in the second chamber of the station | |
316 | while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
6b191dea | 317 | z2 = cluster2->GetZ(); |
318 | dZ = z1 - z2; | |
96ebe67e | 319 | |
6b191dea | 320 | // ------ track selection in non bending direction ------ |
321 | nonBendingSlope = (cluster1->GetX() - cluster2->GetX()) / dZ; | |
322 | if (GetRecoParam()->SelectOnTrackSlope()) { | |
9f093251 | 323 | |
6b191dea | 324 | // check if non bending slope is within tolerances |
4663da9f | 325 | nonBendingSlopeErr = TMath::Sqrt((cluster1->GetErrX2() + cluster2->GetErrX2()) / dZ / dZ + angleMCS2); |
6b191dea | 326 | if ((TMath::Abs(nonBendingSlope) - sigmaCut * nonBendingSlopeErr) > GetRecoParam()->GetMaxNonBendingSlope()) continue; |
9f093251 | 327 | |
6b191dea | 328 | } else { |
329 | ||
330 | // or check if non bending impact parameter is within tolerances | |
331 | nonBendingImpactParam = TMath::Abs(cluster1->GetX() - cluster1->GetZ() * nonBendingSlope); | |
332 | nonBendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrX2() + z2 * z2 * cluster1->GetErrX2()) / dZ / dZ + impactMCS2); | |
333 | if ((nonBendingImpactParam - sigmaCut * nonBendingImpactParamErr) > (3. * GetRecoParam()->GetNonBendingVertexDispersion())) continue; | |
334 | ||
335 | } | |
336 | ||
337 | // ------ track selection in bending direction ------ | |
338 | bendingSlope = (cluster1->GetY() - cluster2->GetY()) / dZ; | |
339 | if (AliMUONTrackExtrap::IsFieldON()) { // depending whether the field is ON or OFF | |
9f093251 | 340 | |
341 | // check if bending momentum is within tolerances | |
6b191dea | 342 | bendingImpactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope; |
343 | bendingImpactParamErr2 = (z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2; | |
344 | bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(bendingImpactParam)); | |
345 | bendingMomentumErr = TMath::Sqrt((bendingVertexDispersion2 + bendingImpactParamErr2) / | |
346 | bendingImpactParam / bendingImpactParam + 0.01) * bendingMomentum; | |
347 | if ((bendingMomentum + 3. * bendingMomentumErr) < GetRecoParam()->GetMinBendingMomentum()) continue; | |
96ebe67e | 348 | |
9f093251 | 349 | } else { |
350 | ||
6b191dea | 351 | if (GetRecoParam()->SelectOnTrackSlope()) { |
352 | ||
353 | // check if bending slope is within tolerances | |
4663da9f | 354 | bendingSlopeErr = TMath::Sqrt((cluster1->GetErrY2() + cluster2->GetErrY2()) / dZ / dZ + angleMCS2); |
6b191dea | 355 | if ((TMath::Abs(bendingSlope) - sigmaCut * bendingSlopeErr) > GetRecoParam()->GetMaxBendingSlope()) continue; |
356 | ||
357 | } else { | |
358 | ||
359 | // or check if bending impact parameter is within tolerances | |
360 | bendingImpactParam = TMath::Abs(cluster1->GetY() - cluster1->GetZ() * bendingSlope); | |
361 | bendingImpactParamErr = TMath::Sqrt((z1 * z1 * cluster2->GetErrY2() + z2 * z2 * cluster1->GetErrY2()) / dZ / dZ + impactMCS2); | |
362 | if ((bendingImpactParam - sigmaCut * bendingImpactParamErr) > (3. * GetRecoParam()->GetBendingVertexDispersion())) continue; | |
363 | ||
364 | } | |
365 | ||
9f093251 | 366 | } |
6b191dea | 367 | |
9f093251 | 368 | // make new segment |
369 | segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE); | |
370 | ||
371 | // Printout for debug | |
372 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
373 | cout << "segmentIndex(0...): " << segments->GetLast() << endl; | |
374 | segment->Dump(); | |
375 | cout << "Cluster in first chamber" << endl; | |
376 | cluster1->Print(); | |
377 | cout << "Cluster in second chamber" << endl; | |
378 | cluster2->Print(); | |
8d0843c6 | 379 | } |
96ebe67e | 380 | |
381 | } | |
382 | ||
383 | } | |
384 | ||
385 | // Printout for debug | |
9bf6860b | 386 | AliDebug(1,Form("chambers%d-%d: NSegments = %d ", ch1+1, ch2+1, segments->GetEntriesFast())); |
96ebe67e | 387 | |
208f139e | 388 | return segments; |
8d0843c6 | 389 | } |
390 | ||
89c8d66d | 391 | //__________________________________________________________________________ |
392 | void AliMUONVTrackReconstructor::RemoveUsedSegments(TClonesArray& segments) | |
393 | { | |
394 | /// To remove pairs of clusters already attached to a track | |
395 | AliDebug(1,"Enter RemoveUsedSegments"); | |
396 | Int_t nSegments = segments.GetEntriesFast(); | |
397 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
398 | AliMUONObjectPair *segment; | |
399 | AliMUONTrack *track; | |
400 | AliMUONVCluster *cluster, *cluster1, *cluster2; | |
401 | Bool_t foundCluster1, foundCluster2, removeSegment; | |
402 | ||
403 | // Loop over segments | |
404 | for (Int_t iSegment=0; iSegment<nSegments; iSegment++) { | |
405 | segment = (AliMUONObjectPair*) segments.UncheckedAt(iSegment); | |
406 | ||
407 | cluster1 = (AliMUONVCluster*) segment->First(); | |
408 | cluster2 = (AliMUONVCluster*) segment->Second(); | |
409 | removeSegment = kFALSE; | |
410 | ||
411 | // Loop over tracks | |
412 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
413 | track = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack); | |
414 | ||
415 | // skip empty slot | |
416 | if (!track) continue; | |
417 | ||
418 | foundCluster1 = kFALSE; | |
419 | foundCluster2 = kFALSE; | |
420 | ||
421 | // Loop over clusters | |
422 | Int_t nClusters = track->GetNClusters(); | |
423 | for (Int_t iCluster = 0; iCluster < nClusters; iCluster++) { | |
424 | cluster = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iCluster))->GetClusterPtr(); | |
425 | ||
426 | // check if both clusters are in that track | |
427 | if (cluster == cluster1) foundCluster1 = kTRUE; | |
428 | else if (cluster == cluster2) foundCluster2 = kTRUE; | |
429 | ||
430 | if (foundCluster1 && foundCluster2) { | |
431 | removeSegment = kTRUE; | |
432 | break; | |
433 | } | |
434 | ||
435 | } | |
436 | ||
437 | if (removeSegment) break; | |
438 | ||
439 | } | |
440 | ||
441 | if (removeSegment) segments.RemoveAt(iSegment); | |
442 | ||
443 | } | |
444 | ||
445 | segments.Compress(); | |
446 | ||
447 | // Printout for debug | |
448 | AliDebug(1,Form("NSegments = %d ", segments.GetEntriesFast())); | |
449 | } | |
450 | ||
ea94c18b | 451 | //__________________________________________________________________________ |
452 | void AliMUONVTrackReconstructor::RemoveIdenticalTracks() | |
453 | { | |
454 | /// To remove identical tracks: | |
96ebe67e | 455 | /// Tracks are considered identical if they have all their clusters in common. |
456 | /// One keeps the track with the larger number of clusters if need be | |
89c8d66d | 457 | AliMUONTrack *track1, *track2; |
458 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
96ebe67e | 459 | Int_t clustersInCommon, nClusters1, nClusters2; |
ea94c18b | 460 | // Loop over first track of the pair |
89c8d66d | 461 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
462 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
463 | // skip empty slot | |
464 | if (!track1) continue; | |
96ebe67e | 465 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 466 | // Loop over second track of the pair |
89c8d66d | 467 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
468 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
469 | // skip empty slot | |
470 | if (!track2) continue; | |
96ebe67e | 471 | nClusters2 = track2->GetNClusters(); |
472 | // number of clusters in common between two tracks | |
473 | clustersInCommon = track1->ClustersInCommon(track2); | |
ea94c18b | 474 | // check for identical tracks |
96ebe67e | 475 | if ((clustersInCommon == nClusters1) || (clustersInCommon == nClusters2)) { |
ea94c18b | 476 | // decide which track to remove |
96ebe67e | 477 | if (nClusters2 > nClusters1) { |
ea94c18b | 478 | // remove track1 and continue the first loop with the track next to track1 |
89c8d66d | 479 | fRecTracksPtr->RemoveAt(iTrack1); |
ea94c18b | 480 | fNRecTracks--; |
ea94c18b | 481 | break; |
482 | } else { | |
483 | // remove track2 and continue the second loop with the track next to track2 | |
89c8d66d | 484 | fRecTracksPtr->RemoveAt(iTrack2); |
ea94c18b | 485 | fNRecTracks--; |
486 | } | |
89c8d66d | 487 | } |
ea94c18b | 488 | } // track2 |
ea94c18b | 489 | } // track1 |
89c8d66d | 490 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
ea94c18b | 491 | } |
492 | ||
493 | //__________________________________________________________________________ | |
494 | void AliMUONVTrackReconstructor::RemoveDoubleTracks() | |
495 | { | |
496 | /// To remove double tracks: | |
96ebe67e | 497 | /// Tracks are considered identical if more than half of the clusters of the track |
498 | /// which has the smaller number of clusters are in common with the other track. | |
499 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
ea94c18b | 500 | /// or, if these numbers are equal, the track with the minimum chi2. |
89c8d66d | 501 | AliMUONTrack *track1, *track2; |
502 | Int_t nTracks = fRecTracksPtr->GetEntriesFast(); | |
503 | Int_t clustersInCommon2, nClusters1, nClusters2; | |
ea94c18b | 504 | // Loop over first track of the pair |
89c8d66d | 505 | for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) { |
506 | track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1); | |
507 | // skip empty slot | |
508 | if (!track1) continue; | |
96ebe67e | 509 | nClusters1 = track1->GetNClusters(); |
ea94c18b | 510 | // Loop over second track of the pair |
89c8d66d | 511 | for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) { |
512 | track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2); | |
513 | // skip empty slot | |
514 | if (!track2) continue; | |
96ebe67e | 515 | nClusters2 = track2->GetNClusters(); |
516 | // number of clusters in common between two tracks | |
89c8d66d | 517 | clustersInCommon2 = 2 * track1->ClustersInCommon(track2); |
ea94c18b | 518 | // check for identical tracks |
89c8d66d | 519 | if (clustersInCommon2 > nClusters1 || clustersInCommon2 > nClusters2) { |
ea94c18b | 520 | // decide which track to remove |
96ebe67e | 521 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { |
ea94c18b | 522 | // remove track2 and continue the second loop with the track next to track2 |
89c8d66d | 523 | fRecTracksPtr->RemoveAt(iTrack2); |
c59f70b9 | 524 | fNRecTracks--; |
525 | } else { | |
526 | // else remove track1 and continue the first loop with the track next to track1 | |
89c8d66d | 527 | fRecTracksPtr->RemoveAt(iTrack1); |
c59f70b9 | 528 | fNRecTracks--; |
c59f70b9 | 529 | break; |
530 | } | |
89c8d66d | 531 | } |
c59f70b9 | 532 | } // track2 |
c59f70b9 | 533 | } // track1 |
89c8d66d | 534 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
c59f70b9 | 535 | } |
536 | ||
537 | //__________________________________________________________________________ | |
538 | void AliMUONVTrackReconstructor::RemoveConnectedTracks(Bool_t inSt345) | |
539 | { | |
540 | /// To remove double tracks: | |
541 | /// Tracks are considered identical if they share 1 cluster or more. | |
542 | /// If inSt345=kTRUE only stations 3, 4 and 5 are considered. | |
543 | /// Among two identical tracks, one keeps the track with the larger number of clusters | |
544 | /// or, if these numbers are equal, the track with the minimum chi2. | |
545 | AliMUONTrack *track1, *track2, *trackToRemove; | |
546 | Int_t clustersInCommon, nClusters1, nClusters2; | |
547 | Bool_t removedTrack1; | |
548 | // Loop over first track of the pair | |
549 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
550 | while (track1) { | |
551 | removedTrack1 = kFALSE; | |
552 | nClusters1 = track1->GetNClusters(); | |
553 | // Loop over second track of the pair | |
554 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
555 | while (track2) { | |
556 | nClusters2 = track2->GetNClusters(); | |
557 | // number of clusters in common between two tracks | |
89c8d66d | 558 | if (inSt345) clustersInCommon = track1->ClustersInCommonInSt345(track2); |
559 | else clustersInCommon = track1->ClustersInCommon(track2); | |
c59f70b9 | 560 | // check for identical tracks |
561 | if (clustersInCommon > 0) { | |
562 | // decide which track to remove | |
563 | if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) { | |
564 | // remove track2 and continue the second loop with the track next to track2 | |
565 | trackToRemove = track2; | |
566 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
567 | fRecTracksPtr->Remove(trackToRemove); | |
ea94c18b | 568 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards |
569 | fNRecTracks--; | |
570 | } else { | |
571 | // else remove track1 and continue the first loop with the track next to track1 | |
572 | trackToRemove = track1; | |
573 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
574 | fRecTracksPtr->Remove(trackToRemove); | |
575 | fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards | |
576 | fNRecTracks--; | |
577 | removedTrack1 = kTRUE; | |
578 | break; | |
579 | } | |
580 | } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
581 | } // track2 | |
582 | if (removedTrack1) continue; | |
583 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
584 | } // track1 | |
585 | return; | |
586 | } | |
587 | ||
1fef78c8 | 588 | //__________________________________________________________________________ |
9bf6860b | 589 | void AliMUONVTrackReconstructor::AskForNewClustersInChamber(const AliMUONTrackParam &trackParam, |
590 | AliMUONVClusterStore& clusterStore, Int_t chamber) | |
1fef78c8 | 591 | { |
592 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
1fef78c8 | 593 | |
9bf6860b | 594 | // check if the current chamber is useable |
a0dc65b4 | 595 | if (!fClusterServer || !GetRecoParam()->UseChamber(chamber)) return; |
1fef78c8 | 596 | |
9bf6860b | 597 | // maximum distance between the center of the chamber and a detection element |
598 | // (accounting for the inclination of the chamber) | |
b89ac3d6 | 599 | static const Double_t kMaxDZ = 15.; // 15 cm |
1fef78c8 | 600 | |
9bf6860b | 601 | // extrapolate track parameters to the chamber |
602 | AliMUONTrackParam extrapTrackParam(trackParam); | |
4ea3f013 | 603 | if (!AliMUONTrackExtrap::ExtrapToZCov(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(chamber))) return; |
9bf6860b | 604 | |
6b191dea | 605 | // build the searching area using the track and chamber resolutions and the maximum-distance-to-track value |
9bf6860b | 606 | const TMatrixD& kParamCov = extrapTrackParam.GetCovariances(); |
6b191dea | 607 | Double_t errX2 = kParamCov(0,0) + kMaxDZ * kMaxDZ * kParamCov(1,1) + 2. * kMaxDZ * TMath::Abs(kParamCov(0,1)) + |
608 | GetRecoParam()->GetDefaultNonBendingReso(chamber) * GetRecoParam()->GetDefaultNonBendingReso(chamber); | |
609 | Double_t errY2 = kParamCov(2,2) + kMaxDZ * kMaxDZ * kParamCov(3,3) + 2. * kMaxDZ * TMath::Abs(kParamCov(2,3)) + | |
610 | GetRecoParam()->GetDefaultBendingReso(chamber) * GetRecoParam()->GetDefaultBendingReso(chamber); | |
b89ac3d6 | 611 | Double_t dX = TMath::Abs(trackParam.GetNonBendingSlope()) * kMaxDZ + |
a0dc65b4 | 612 | GetRecoParam()->GetMaxNonBendingDistanceToTrack() + |
6b191dea | 613 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2); |
b89ac3d6 | 614 | Double_t dY = TMath::Abs(trackParam.GetBendingSlope()) * kMaxDZ + |
a0dc65b4 | 615 | GetRecoParam()->GetMaxBendingDistanceToTrack() + |
6b191dea | 616 | GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2); |
6e97fbb8 | 617 | AliMpArea area(extrapTrackParam.GetNonBendingCoor(), |
618 | extrapTrackParam.GetBendingCoor(), | |
619 | dX, dY); | |
1fef78c8 | 620 | |
621 | // ask to cluterize in the given area of the given chamber | |
35be7ed7 | 622 | fClusterServer->Clusterize(chamber, clusterStore, area, GetRecoParam()); |
1fef78c8 | 623 | |
9bf6860b | 624 | } |
625 | ||
626 | //__________________________________________________________________________ | |
627 | void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam, | |
628 | AliMUONVClusterStore& clusterStore, Int_t station) | |
629 | { | |
630 | /// Ask the clustering to reconstruct new clusters around the track candidate position | |
631 | /// in the 2 chambers of the given station | |
632 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station+1); | |
633 | AskForNewClustersInChamber(trackParam, clusterStore, 2*station); | |
1fef78c8 | 634 | } |
635 | ||
ea94c18b | 636 | //__________________________________________________________________________ |
96ebe67e | 637 | Double_t AliMUONVTrackReconstructor::TryOneCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster, |
1fef78c8 | 638 | AliMUONTrackParam &trackParamAtCluster, Bool_t updatePropagator) |
ea94c18b | 639 | { |
96ebe67e | 640 | /// Test the compatibility between the track and the cluster (using trackParam's covariance matrix): |
ea94c18b | 641 | /// return the corresponding Chi2 |
96ebe67e | 642 | /// return trackParamAtCluster |
ea94c18b | 643 | |
96ebe67e | 644 | // extrapolate track parameters and covariances at the z position of the tested cluster |
4ea3f013 | 645 | // and set pointer to cluster into trackParamAtCluster |
96ebe67e | 646 | trackParamAtCluster = trackParam; |
96ebe67e | 647 | trackParamAtCluster.SetClusterPtr(cluster); |
4ea3f013 | 648 | if (!AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtCluster, cluster->GetZ(), updatePropagator)) |
649 | return 2.*AliMUONTrack::MaxChi2(); | |
ea94c18b | 650 | |
96ebe67e | 651 | // Set differences between trackParam and cluster in the bending and non bending directions |
652 | Double_t dX = cluster->GetX() - trackParamAtCluster.GetNonBendingCoor(); | |
653 | Double_t dY = cluster->GetY() - trackParamAtCluster.GetBendingCoor(); | |
ea94c18b | 654 | |
019df241 | 655 | // Calculate errors and covariances |
96ebe67e | 656 | const TMatrixD& kParamCov = trackParamAtCluster.GetCovariances(); |
657 | Double_t sigmaX2 = kParamCov(0,0) + cluster->GetErrX2(); | |
658 | Double_t sigmaY2 = kParamCov(2,2) + cluster->GetErrY2(); | |
6b191dea | 659 | Double_t covXY = kParamCov(0,2); |
660 | Double_t det = sigmaX2 * sigmaY2 - covXY * covXY; | |
019df241 | 661 | |
662 | // Compute chi2 | |
4ea3f013 | 663 | if (det == 0.) return 2.*AliMUONTrack::MaxChi2(); |
6b191dea | 664 | return (dX * dX * sigmaY2 + dY * dY * sigmaX2 - 2. * dX * dY * covXY) / det; |
019df241 | 665 | |
666 | } | |
667 | ||
668 | //__________________________________________________________________________ | |
5a240757 | 669 | Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, const AliMUONVCluster* cluster) |
019df241 | 670 | { |
9bf6860b | 671 | /// Test the compatibility between the track and the cluster |
6b191dea | 672 | /// given the track and cluster resolutions + the maximum-distance-to-track value |
9bf6860b | 673 | /// and assuming linear propagation of the track: |
019df241 | 674 | /// return kTRUE if they are compatibles |
675 | ||
96ebe67e | 676 | Double_t dZ = cluster->GetZ() - trackParam.GetZ(); |
677 | Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ); | |
678 | Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ); | |
9bf6860b | 679 | const TMatrixD& kParamCov = trackParam.GetCovariances(); |
6b191dea | 680 | Double_t errX2 = kParamCov(0,0) + dZ * dZ * kParamCov(1,1) + 2. * dZ * kParamCov(0,1) + cluster->GetErrX2(); |
681 | Double_t errY2 = kParamCov(2,2) + dZ * dZ * kParamCov(3,3) + 2. * dZ * kParamCov(2,3) + cluster->GetErrY2(); | |
9bf6860b | 682 | |
6b191dea | 683 | Double_t dXmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errX2) + |
a0dc65b4 | 684 | GetRecoParam()->GetMaxNonBendingDistanceToTrack(); |
6b191dea | 685 | Double_t dYmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(2. * errY2) + |
a0dc65b4 | 686 | GetRecoParam()->GetMaxBendingDistanceToTrack(); |
019df241 | 687 | |
9bf6860b | 688 | if (TMath::Abs(dX) > dXmax || TMath::Abs(dY) > dYmax) return kFALSE; |
019df241 | 689 | |
690 | return kTRUE; | |
691 | ||
692 | } | |
693 | ||
694 | //__________________________________________________________________________ | |
96ebe67e | 695 | Double_t AliMUONVTrackReconstructor::TryTwoClustersFast(const AliMUONTrackParam &trackParamAtCluster1, AliMUONVCluster* cluster2, |
696 | AliMUONTrackParam &trackParamAtCluster2) | |
019df241 | 697 | { |
96ebe67e | 698 | /// Test the compatibility between the track and the 2 clusters together (using trackParam's covariance matrix) |
699 | /// assuming linear propagation between the two clusters: | |
700 | /// return the corresponding Chi2 accounting for covariances between the 2 clusters | |
701 | /// return trackParamAtCluster2 | |
019df241 | 702 | |
96ebe67e | 703 | // extrapolate linearly track parameters and covariances at the z position of the second cluster |
704 | trackParamAtCluster2 = trackParamAtCluster1; | |
3fe6651e | 705 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParamAtCluster2, cluster2->GetZ()); |
019df241 | 706 | |
96ebe67e | 707 | // set pointer to cluster2 into trackParamAtCluster2 |
708 | trackParamAtCluster2.SetClusterPtr(cluster2); | |
019df241 | 709 | |
96ebe67e | 710 | // Set differences between track and clusters in the bending and non bending directions |
711 | AliMUONVCluster* cluster1 = trackParamAtCluster1.GetClusterPtr(); | |
712 | Double_t dX1 = cluster1->GetX() - trackParamAtCluster1.GetNonBendingCoor(); | |
713 | Double_t dX2 = cluster2->GetX() - trackParamAtCluster2.GetNonBendingCoor(); | |
714 | Double_t dY1 = cluster1->GetY() - trackParamAtCluster1.GetBendingCoor(); | |
715 | Double_t dY2 = cluster2->GetY() - trackParamAtCluster2.GetBendingCoor(); | |
019df241 | 716 | |
717 | // Calculate errors and covariances | |
96ebe67e | 718 | const TMatrixD& kParamCov1 = trackParamAtCluster1.GetCovariances(); |
719 | const TMatrixD& kParamCov2 = trackParamAtCluster2.GetCovariances(); | |
720 | Double_t dZ = trackParamAtCluster2.GetZ() - trackParamAtCluster1.GetZ(); | |
721 | Double_t sigma2X1 = kParamCov1(0,0) + cluster1->GetErrX2(); | |
722 | Double_t sigma2X2 = kParamCov2(0,0) + cluster2->GetErrX2(); | |
019df241 | 723 | Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1); |
96ebe67e | 724 | Double_t sigma2Y1 = kParamCov1(2,2) + cluster1->GetErrY2(); |
725 | Double_t sigma2Y2 = kParamCov2(2,2) + cluster2->GetErrY2(); | |
019df241 | 726 | Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3); |
727 | ||
728 | // Compute chi2 | |
729 | Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2; | |
730 | Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2; | |
4ea3f013 | 731 | if (detX == 0. || detY == 0.) return 2.*AliMUONTrack::MaxChi2(); |
019df241 | 732 | return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX |
733 | + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY; | |
734 | ||
735 | } | |
736 | ||
737 | //__________________________________________________________________________ | |
9bf6860b | 738 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInChamber(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
739 | Int_t nextChamber) | |
740 | { | |
741 | /// Follow trackCandidate in chamber(0..) nextChamber assuming linear propagation, and search for compatible cluster(s) | |
742 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: | |
743 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
744 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
745 | /// Remove the obsolete "trackCandidate" at the end. | |
746 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. | |
747 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
748 | AliDebug(1,Form("Enter FollowLinearTrackInChamber(1..) %d", nextChamber+1)); | |
749 | ||
4ea3f013 | 750 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
a0dc65b4 | 751 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
752 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
9bf6860b | 753 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
754 | Bool_t foundOneCluster = kFALSE; | |
755 | AliMUONTrack *newTrack = 0x0; | |
756 | AliMUONVCluster *cluster; | |
757 | AliMUONTrackParam trackParam; | |
758 | AliMUONTrackParam extrapTrackParamAtCluster; | |
759 | AliMUONTrackParam bestTrackParamAtCluster; | |
760 | ||
761 | // Get track parameters according to the propagation direction | |
762 | if (nextChamber > 7) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
763 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
764 | ||
765 | // Printout for debuging | |
766 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
767 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
768 | trackParam.GetParameters().Print(); | |
769 | trackParam.GetCovariances().Print(); | |
770 | } | |
771 | ||
772 | // Add MCS effect | |
4663da9f | 773 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
9bf6860b | 774 | |
775 | // Printout for debuging | |
776 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
777 | cout << "FollowLinearTrackInChamber: look for cluster in chamber(1..): " << nextChamber+1 << endl; | |
778 | } | |
779 | ||
780 | // Create iterators to loop over clusters in chamber | |
781 | TIter next(clusterStore.CreateChamberIterator(nextChamber,nextChamber)); | |
782 | ||
783 | // look for candidates in chamber | |
784 | while ( ( cluster = static_cast<AliMUONVCluster*>(next()) ) ) { | |
785 | ||
786 | // try to add the current cluster fast | |
787 | if (!TryOneClusterFast(trackParam, cluster)) continue; | |
788 | ||
789 | // try to add the current cluster accuratly | |
790 | extrapTrackParamAtCluster = trackParam; | |
3fe6651e | 791 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster, cluster->GetZ()); |
9bf6860b | 792 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster, cluster, extrapTrackParamAtCluster); |
793 | ||
794 | // if good chi2 then consider to add cluster | |
795 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
796 | foundOneCluster = kTRUE; | |
797 | ||
798 | // Printout for debuging | |
799 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
800 | cout << "FollowLinearTrackInChamber: found one cluster in chamber(1..): " << nextChamber+1 | |
801 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
802 | cluster->Print(); | |
803 | } | |
804 | ||
a0dc65b4 | 805 | if (GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 806 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
807 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); | |
a0dc65b4 | 808 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 809 | extrapTrackParamAtCluster.SetRemovable(kFALSE); |
810 | else extrapTrackParamAtCluster.SetRemovable(kTRUE); | |
811 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster,*cluster); | |
89c8d66d | 812 | newTrack->SetGlobalChi2(trackCandidate.GetGlobalChi2()+chi2WithOneCluster); |
9bf6860b | 813 | fNRecTracks++; |
814 | ||
815 | // Printout for debuging | |
816 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
817 | cout << "FollowLinearTrackInChamber: added one cluster in chamber(1..): " << nextChamber+1 << endl; | |
818 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
819 | } | |
820 | ||
821 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { | |
822 | // keep track of the best cluster | |
823 | bestChi2WithOneCluster = chi2WithOneCluster; | |
824 | bestTrackParamAtCluster = extrapTrackParamAtCluster; | |
825 | } | |
826 | ||
827 | } | |
828 | ||
829 | } | |
830 | ||
831 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 832 | if (!GetRecoParam()->TrackAllTracks()) { |
9bf6860b | 833 | if (foundOneCluster) { |
a0dc65b4 | 834 | if (GetRecoParam()->RequestStation(nextChamber/2)) |
9bf6860b | 835 | bestTrackParamAtCluster.SetRemovable(kFALSE); |
836 | else bestTrackParamAtCluster.SetRemovable(kTRUE); | |
837 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster,*(bestTrackParamAtCluster.GetClusterPtr())); | |
89c8d66d | 838 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
9bf6860b | 839 | |
840 | // Printout for debuging | |
841 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
842 | cout << "FollowLinearTrackInChamber: added the best cluster in chamber(1..): " << bestTrackParamAtCluster.GetClusterPtr()->GetChamberId()+1 << endl; | |
843 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); | |
844 | } | |
845 | ||
846 | } else return kFALSE; | |
847 | ||
848 | } else if (foundOneCluster) { | |
849 | ||
850 | // remove obsolete track | |
851 | fRecTracksPtr->Remove(&trackCandidate); | |
852 | fNRecTracks--; | |
853 | ||
854 | } else return kFALSE; | |
855 | ||
856 | return kTRUE; | |
857 | ||
858 | } | |
859 | ||
860 | //__________________________________________________________________________ | |
96ebe67e | 861 | Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore, |
862 | Int_t nextStation) | |
019df241 | 863 | { |
96ebe67e | 864 | /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible cluster(s) |
019df241 | 865 | /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks: |
866 | /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of | |
867 | /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure. | |
868 | /// Remove the obsolete "trackCandidate" at the end. | |
96ebe67e | 869 | /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority. |
870 | /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE) | |
019df241 | 871 | AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1)); |
872 | ||
873 | // Order the chamber according to the propagation direction (tracking starts with chamber 2): | |
874 | // - nextStation == station(1...) 5 => forward propagation | |
875 | // - nextStation < station(1...) 5 => backward propagation | |
876 | Int_t ch1, ch2; | |
877 | if (nextStation==4) { | |
878 | ch1 = 2*nextStation+1; | |
879 | ch2 = 2*nextStation; | |
ea94c18b | 880 | } else { |
019df241 | 881 | ch1 = 2*nextStation; |
882 | ch2 = 2*nextStation+1; | |
ea94c18b | 883 | } |
884 | ||
4ea3f013 | 885 | Double_t chi2WithOneCluster = AliMUONTrack::MaxChi2(); |
886 | Double_t chi2WithTwoClusters = AliMUONTrack::MaxChi2(); | |
a0dc65b4 | 887 | Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() * |
888 | GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2 | |
889 | Double_t maxChi2WithTwoClusters = 4. * GetRecoParam()->GetSigmaCutForTracking() * | |
890 | GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2 | |
96ebe67e | 891 | Double_t bestChi2WithOneCluster = maxChi2WithOneCluster; |
892 | Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters; | |
893 | Bool_t foundOneCluster = kFALSE; | |
894 | Bool_t foundTwoClusters = kFALSE; | |
019df241 | 895 | AliMUONTrack *newTrack = 0x0; |
96ebe67e | 896 | AliMUONVCluster *clusterCh1, *clusterCh2; |
7332f213 | 897 | AliMUONTrackParam trackParam; |
96ebe67e | 898 | AliMUONTrackParam extrapTrackParamAtCluster1; |
899 | AliMUONTrackParam extrapTrackParamAtCluster2; | |
900 | AliMUONTrackParam bestTrackParamAtCluster1; | |
901 | AliMUONTrackParam bestTrackParamAtCluster2; | |
902 | ||
903 | Int_t nClusters = clusterStore.GetSize(); | |
904 | Bool_t *clusterCh1Used = new Bool_t[nClusters]; | |
905 | for (Int_t i = 0; i < nClusters; i++) clusterCh1Used[i] = kFALSE; | |
906 | Int_t iCluster1; | |
019df241 | 907 | |
7332f213 | 908 | // Get track parameters according to the propagation direction |
909 | if (nextStation==4) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last(); | |
910 | else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First(); | |
019df241 | 911 | |
9bf6860b | 912 | // Printout for debuging |
913 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) { | |
914 | cout<<endl<<"Track parameters and covariances at first cluster:"<<endl; | |
915 | trackParam.GetParameters().Print(); | |
916 | trackParam.GetCovariances().Print(); | |
917 | } | |
918 | ||
019df241 | 919 | // Add MCS effect |
4663da9f | 920 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(trackParam.GetClusterPtr()->GetChamberId()),-1.); |
019df241 | 921 | |
922 | // Printout for debuging | |
923 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 924 | cout << "FollowLinearTrackInStation: look for clusters in chamber(1..): " << ch2+1 << endl; |
019df241 | 925 | } |
926 | ||
96ebe67e | 927 | // Create iterators to loop over clusters in both chambers |
928 | TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1)); | |
929 | TIter nextInCh2(clusterStore.CreateChamberIterator(ch2,ch2)); | |
930 | ||
931 | // look for candidates in chamber 2 | |
932 | while ( ( clusterCh2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) { | |
019df241 | 933 | |
96ebe67e | 934 | // try to add the current cluster fast |
935 | if (!TryOneClusterFast(trackParam, clusterCh2)) continue; | |
019df241 | 936 | |
96ebe67e | 937 | // try to add the current cluster accuratly |
938 | extrapTrackParamAtCluster2 = trackParam; | |
3fe6651e | 939 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster2, clusterCh2->GetZ()); |
96ebe67e | 940 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster2, clusterCh2, extrapTrackParamAtCluster2); |
019df241 | 941 | |
96ebe67e | 942 | // if good chi2 then try to attach a cluster in the other chamber too |
943 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
944 | Bool_t foundSecondCluster = kFALSE; | |
019df241 | 945 | |
946 | // Printout for debuging | |
947 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 948 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1 |
949 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 950 | clusterCh2->Print(); |
96ebe67e | 951 | cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl; |
019df241 | 952 | } |
953 | ||
954 | // add MCS effect | |
4663da9f | 955 | AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtCluster2,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
019df241 | 956 | |
96ebe67e | 957 | // reset cluster iterator of chamber 1 |
958 | nextInCh1.Reset(); | |
959 | iCluster1 = -1; | |
960 | ||
961 | // look for second candidates in chamber 1 | |
962 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
963 | iCluster1++; | |
019df241 | 964 | |
96ebe67e | 965 | // try to add the current cluster fast |
966 | if (!TryOneClusterFast(extrapTrackParamAtCluster2, clusterCh1)) continue; | |
019df241 | 967 | |
96ebe67e | 968 | // try to add the current cluster in addition to the one found in the previous chamber |
969 | chi2WithTwoClusters = TryTwoClustersFast(extrapTrackParamAtCluster2, clusterCh1, extrapTrackParamAtCluster1); | |
019df241 | 970 | |
96ebe67e | 971 | // if good chi2 then consider to add the 2 clusters to the "trackCandidate" |
972 | if (chi2WithTwoClusters < maxChi2WithTwoClusters) { | |
973 | foundSecondCluster = kTRUE; | |
974 | foundTwoClusters = kTRUE; | |
019df241 | 975 | |
976 | // Printout for debuging | |
977 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 978 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
9bf6860b | 979 | << " (Chi2 = " << chi2WithTwoClusters << ")" << endl; |
980 | clusterCh1->Print(); | |
019df241 | 981 | } |
982 | ||
a0dc65b4 | 983 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 984 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters |
019df241 | 985 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
96ebe67e | 986 | extrapTrackParamAtCluster1.SetRemovable(kTRUE); |
987 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); | |
988 | extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
989 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); | |
89c8d66d | 990 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithTwoClusters); |
019df241 | 991 | fNRecTracks++; |
992 | ||
96ebe67e | 993 | // Tag clusterCh1 as used |
994 | clusterCh1Used[iCluster1] = kTRUE; | |
019df241 | 995 | |
996 | // Printout for debuging | |
997 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 998 | cout << "FollowLinearTrackInStation: added two clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 999 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1000 | } | |
1001 | ||
96ebe67e | 1002 | } else if (chi2WithTwoClusters < bestChi2WithTwoClusters) { |
1003 | // keep track of the best couple of clusters | |
1004 | bestChi2WithTwoClusters = chi2WithTwoClusters; | |
1005 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
1006 | bestTrackParamAtCluster2 = extrapTrackParamAtCluster2; | |
019df241 | 1007 | } |
1008 | ||
1009 | } | |
1010 | ||
1011 | } | |
1012 | ||
96ebe67e | 1013 | // if no cluster found in chamber1 then consider to add clusterCh2 only |
1014 | if (!foundSecondCluster) { | |
1015 | foundOneCluster = kTRUE; | |
019df241 | 1016 | |
a0dc65b4 | 1017 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1018 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1019 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1020 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1021 | extrapTrackParamAtCluster2.SetRemovable(kFALSE); |
1022 | else extrapTrackParamAtCluster2.SetRemovable(kTRUE); | |
96ebe67e | 1023 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2); |
89c8d66d | 1024 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1025 | fNRecTracks++; |
1026 | ||
1027 | // Printout for debuging | |
1028 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1029 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch2+1 << endl; |
019df241 | 1030 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1031 | } | |
1032 | ||
96ebe67e | 1033 | } else if (!foundTwoClusters && chi2WithOneCluster < bestChi2WithOneCluster) { |
1034 | // keep track of the best cluster except if a couple of clusters has already been found | |
1035 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1036 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster2; | |
019df241 | 1037 | } |
1038 | ||
1039 | } | |
1040 | ||
1041 | } | |
1042 | ||
1043 | } | |
1044 | ||
1045 | // look for candidates in chamber 1 not already attached to a track | |
96ebe67e | 1046 | // if we want to keep all possible tracks or if no good couple of clusters has been found |
a0dc65b4 | 1047 | if (GetRecoParam()->TrackAllTracks() || !foundTwoClusters) { |
019df241 | 1048 | |
1049 | // Printout for debuging | |
1050 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1051 | cout << "FollowLinearTrackInStation: look for single cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1052 | } |
1053 | ||
1054 | //Extrapolate trackCandidate to chamber "ch2" | |
3fe6651e | 1055 | AliMUONTrackExtrap::LinearExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(ch2)); |
019df241 | 1056 | |
1057 | // add MCS effect for next step | |
4663da9f | 1058 | AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(ch2),-1.); |
9bf6860b | 1059 | |
96ebe67e | 1060 | // reset cluster iterator of chamber 1 |
1061 | nextInCh1.Reset(); | |
1062 | iCluster1 = -1; | |
1063 | ||
1064 | // look for second candidates in chamber 1 | |
1065 | while ( ( clusterCh1 = static_cast<AliMUONVCluster*>(nextInCh1()) ) ) { | |
1066 | iCluster1++; | |
019df241 | 1067 | |
96ebe67e | 1068 | if (clusterCh1Used[iCluster1]) continue; // Skip clusters already used |
019df241 | 1069 | |
96ebe67e | 1070 | // try to add the current cluster fast |
1071 | if (!TryOneClusterFast(trackParam, clusterCh1)) continue; | |
9bf6860b | 1072 | |
96ebe67e | 1073 | // try to add the current cluster accuratly |
1074 | extrapTrackParamAtCluster1 = trackParam; | |
3fe6651e | 1075 | AliMUONTrackExtrap::LinearExtrapToZCov(&extrapTrackParamAtCluster1, clusterCh1->GetZ()); |
96ebe67e | 1076 | chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1); |
9bf6860b | 1077 | |
96ebe67e | 1078 | // if good chi2 then consider to add clusterCh1 |
1079 | // We do not try to attach a cluster in the other chamber too since it has already been done above | |
1080 | if (chi2WithOneCluster < maxChi2WithOneCluster) { | |
1081 | foundOneCluster = kTRUE; | |
019df241 | 1082 | |
1083 | // Printout for debuging | |
1084 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1085 | cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1 |
1086 | << " (Chi2 = " << chi2WithOneCluster << ")" << endl; | |
9bf6860b | 1087 | clusterCh1->Print(); |
019df241 | 1088 | } |
1089 | ||
a0dc65b4 | 1090 | if (GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1091 | // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster |
019df241 | 1092 | newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate); |
a0dc65b4 | 1093 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1094 | extrapTrackParamAtCluster1.SetRemovable(kFALSE); |
1095 | else extrapTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1096 | newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1); |
89c8d66d | 1097 | newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster); |
019df241 | 1098 | fNRecTracks++; |
1099 | ||
1100 | // Printout for debuging | |
1101 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1102 | cout << "FollowLinearTrackInStation: added one cluster in chamber(1..): " << ch1+1 << endl; |
019df241 | 1103 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1104 | } | |
1105 | ||
96ebe67e | 1106 | } else if (chi2WithOneCluster < bestChi2WithOneCluster) { |
1107 | // keep track of the best cluster except if a couple of clusters has already been found | |
1108 | bestChi2WithOneCluster = chi2WithOneCluster; | |
1109 | bestTrackParamAtCluster1 = extrapTrackParamAtCluster1; | |
019df241 | 1110 | } |
1111 | ||
1112 | } | |
1113 | ||
1114 | } | |
1115 | ||
1116 | } | |
1117 | ||
1118 | // fill out the best track if required else clean up the fRecTracksPtr array | |
a0dc65b4 | 1119 | if (!GetRecoParam()->TrackAllTracks()) { |
96ebe67e | 1120 | if (foundTwoClusters) { |
1121 | bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
1122 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); | |
1123 | bestTrackParamAtCluster2.SetRemovable(kTRUE); | |
1124 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr())); | |
89c8d66d | 1125 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithTwoClusters); |
019df241 | 1126 | |
1127 | // Printout for debuging | |
1128 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1129 | cout << "FollowLinearTrackInStation: added the two best clusters in station(1..): " << nextStation+1 << endl; |
019df241 | 1130 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1131 | } | |
1132 | ||
96ebe67e | 1133 | } else if (foundOneCluster) { |
a0dc65b4 | 1134 | if (GetRecoParam()->RequestStation(nextStation)) |
9bf6860b | 1135 | bestTrackParamAtCluster1.SetRemovable(kFALSE); |
1136 | else bestTrackParamAtCluster1.SetRemovable(kTRUE); | |
96ebe67e | 1137 | trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr())); |
89c8d66d | 1138 | trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster); |
019df241 | 1139 | |
1140 | // Printout for debuging | |
1141 | if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) { | |
96ebe67e | 1142 | cout << "FollowLinearTrackInStation: added the best cluster in chamber(1..): " << bestTrackParamAtCluster1.GetClusterPtr()->GetChamberId()+1 << endl; |
019df241 | 1143 | if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump(); |
1144 | } | |
1145 | ||
dd230855 | 1146 | } else { |
96ebe67e | 1147 | delete [] clusterCh1Used; |
dd230855 | 1148 | return kFALSE; |
1149 | } | |
019df241 | 1150 | |
96ebe67e | 1151 | } else if (foundOneCluster || foundTwoClusters) { |
019df241 | 1152 | |
1153 | // remove obsolete track | |
1154 | fRecTracksPtr->Remove(&trackCandidate); | |
1155 | fNRecTracks--; | |
1156 | ||
dd230855 | 1157 | } else { |
96ebe67e | 1158 | delete [] clusterCh1Used; |
dd230855 | 1159 | return kFALSE; |
1160 | } | |
ea94c18b | 1161 | |
96ebe67e | 1162 | delete [] clusterCh1Used; |
019df241 | 1163 | return kTRUE; |
ea94c18b | 1164 | |
1165 | } | |
1166 | ||
7332f213 | 1167 | //__________________________________________________________________________ |
1168 | void AliMUONVTrackReconstructor::ImproveTracks() | |
1169 | { | |
1170 | /// Improve tracks by removing clusters with local chi2 highter than the defined cut | |
1171 | /// Recompute track parameters and covariances at the remaining clusters | |
1172 | AliDebug(1,"Enter ImproveTracks"); | |
1173 | ||
1174 | AliMUONTrack *track, *nextTrack; | |
1175 | ||
7332f213 | 1176 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1177 | while (track) { | |
1178 | ||
1179 | // prepare next track in case the actual track is suppressed | |
1180 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1181 | ||
1182 | ImproveTrack(*track); | |
1183 | ||
1184 | // remove track if improvement failed | |
1185 | if (!track->IsImproved()) { | |
1186 | fRecTracksPtr->Remove(track); | |
1187 | fNRecTracks--; | |
1188 | } | |
1189 | ||
1190 | track = nextTrack; | |
1191 | } | |
1192 | ||
1193 | // compress the array in case of some tracks have been removed | |
1194 | fRecTracksPtr->Compress(); | |
1195 | ||
1196 | } | |
1197 | ||
1198 | //__________________________________________________________________________ | |
1199 | void AliMUONVTrackReconstructor::Finalize() | |
1200 | { | |
1201 | /// Recompute track parameters and covariances at each attached cluster from those at the first one | |
2e2d0c44 | 1202 | /// Set the label pointing to the corresponding MC track |
4ea3f013 | 1203 | /// Remove the track if finalization failed |
7332f213 | 1204 | |
4ea3f013 | 1205 | AliMUONTrack *track, *nextTrack; |
1206 | Bool_t trackRemoved = kFALSE; | |
7332f213 | 1207 | |
1208 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1209 | while (track) { | |
1210 | ||
4ea3f013 | 1211 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); |
7332f213 | 1212 | |
4ea3f013 | 1213 | if (FinalizeTrack(*track)) track->FindMCLabel(); |
1214 | else { | |
1215 | fRecTracksPtr->Remove(track); | |
1216 | fNRecTracks--; | |
1217 | trackRemoved = kTRUE; | |
1218 | } | |
2e2d0c44 | 1219 | |
4ea3f013 | 1220 | track = nextTrack; |
7332f213 | 1221 | |
1222 | } | |
1223 | ||
4ea3f013 | 1224 | // compress array of tracks if needed |
1225 | if (trackRemoved) fRecTracksPtr->Compress(); | |
1226 | ||
7332f213 | 1227 | } |
1228 | ||
1229 | //__________________________________________________________________________ | |
7ec3b9cf | 1230 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore, |
1231 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
1232 | const AliMUONVTriggerStore& triggerStore, | |
1233 | const AliMUONTrackHitPattern& trackHitPattern) | |
8d0843c6 | 1234 | { |
1235 | /// Try to match track from tracking system with trigger track | |
99c136e1 | 1236 | AliCodeTimerAuto("",0); |
fda59e58 | 1237 | |
683cb6c5 | 1238 | trackHitPattern.ExecuteValidation(trackStore, triggerTrackStore, triggerStore); |
8d0843c6 | 1239 | } |
1240 | ||
ea94c18b | 1241 | //__________________________________________________________________________ |
1242 | void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit, | |
1243 | const AliMUONVTriggerStore& triggerStore, | |
1244 | AliMUONVTriggerTrackStore& triggerTrackStore) | |
8d0843c6 | 1245 | { |
71a2d3aa | 1246 | /// To make the trigger tracks from Local Trigger |
7ec3b9cf | 1247 | AliDebug(1, ""); |
99c136e1 | 1248 | AliCodeTimerAuto("",0); |
bdfb6eef | 1249 | |
7ec3b9cf | 1250 | AliMUONGlobalTrigger* globalTrigger = triggerStore.Global(); |
e6b25a6e | 1251 | |
7ec3b9cf | 1252 | UChar_t gloTrigPat = 0; |
e6b25a6e | 1253 | |
7ec3b9cf | 1254 | if (globalTrigger) |
1255 | { | |
1256 | gloTrigPat = globalTrigger->GetGlobalResponse(); | |
e6b25a6e | 1257 | } |
1258 | ||
7ec3b9cf | 1259 | TIter next(triggerStore.CreateIterator()); |
1260 | AliMUONLocalTrigger* locTrg(0x0); | |
8d0843c6 | 1261 | |
bdfb6eef | 1262 | const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso(); |
1263 | const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso(); | |
1264 | const Double_t kSqrt12 = TMath::Sqrt(12.); | |
7cf63da6 | 1265 | |
7ec3b9cf | 1266 | AliMUONTriggerTrack triggerTrack; |
bdfb6eef | 1267 | TMatrixD trigCov(3,3); |
7ec3b9cf | 1268 | |
1269 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
1270 | { | |
bdfb6eef | 1271 | if ( locTrg->IsTrigX() && locTrg->IsTrigY() ) |
7ec3b9cf | 1272 | { // make Trigger Track if trigger in X and Y |
bdfb6eef | 1273 | |
1274 | Int_t localBoardId = locTrg->LoCircuit(); | |
1275 | ||
32ab62c9 | 1276 | Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX()); |
bdfb6eef | 1277 | Float_t z11 = circuit.GetZ11Pos(localBoardId, locTrg->LoStripX()); |
7ec3b9cf | 1278 | // need first to convert deviation to [0-30] |
1279 | // (see AliMUONLocalTriggerBoard::LocalTrigger) | |
d72d7b9e | 1280 | Int_t deviation = locTrg->GetDeviation(); |
7ec3b9cf | 1281 | Int_t stripX21 = locTrg->LoStripX()+deviation+1; |
32ab62c9 | 1282 | Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21); |
bdfb6eef | 1283 | Float_t z21 = circuit.GetZ21Pos(localBoardId, stripX21); |
32ab62c9 | 1284 | Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY()); |
7ec3b9cf | 1285 | |
bdfb6eef | 1286 | AliDebug(1, Form(" MakeTriggerTrack %3d %2d %2d %2d (%f %f %f) (%f %f)\n",locTrg->LoCircuit(), |
1287 | locTrg->LoStripX(),locTrg->LoStripX()+deviation+1,locTrg->LoStripY(),x11, y11, z11, y21, z21)); | |
abc2458f | 1288 | |
bdfb6eef | 1289 | |
1290 | Double_t deltaZ = z11 - z21; | |
7ec3b9cf | 1291 | |
bdfb6eef | 1292 | Float_t slopeX = x11/z11; |
1293 | Float_t slopeY = (y11-y21) / deltaZ; | |
1294 | ||
1295 | Float_t sigmaX = circuit.GetX11Width(localBoardId, locTrg->LoStripY()) / kSqrt12; | |
1296 | Float_t sigmaY = circuit.GetY11Width(localBoardId, locTrg->LoStripX()) / kSqrt12; | |
1297 | Float_t sigmaY21 = circuit.GetY21Width(localBoardId, locTrg->LoStripX()) / kSqrt12; | |
1298 | ||
1299 | trigCov.Zero(); | |
1300 | trigCov(0,0) = kTrigNonBendReso * kTrigNonBendReso + sigmaX * sigmaX; | |
1301 | trigCov(1,1) = kTrigBendReso * kTrigBendReso + sigmaY * sigmaY; | |
1302 | trigCov(2,2) = | |
1303 | (2. * kTrigBendReso * kTrigBendReso + sigmaY * sigmaY + sigmaY21 * sigmaY21 ) / deltaZ / deltaZ; | |
1304 | trigCov(1,2) = trigCov(2,1) = trigCov(1,1) / deltaZ; | |
1305 | ||
7ec3b9cf | 1306 | triggerTrack.SetX11(x11); |
1307 | triggerTrack.SetY11(y11); | |
bdfb6eef | 1308 | triggerTrack.SetZ11(z11); |
1309 | triggerTrack.SetZ21(z21); | |
1310 | triggerTrack.SetSlopeX(slopeX); | |
1311 | triggerTrack.SetSlopeY(slopeY); | |
7ec3b9cf | 1312 | triggerTrack.SetGTPattern(gloTrigPat); |
32ab62c9 | 1313 | triggerTrack.SetLoTrgNum(localBoardId); |
bdfb6eef | 1314 | triggerTrack.SetCovariances(trigCov); |
1315 | ||
7ec3b9cf | 1316 | triggerTrackStore.Add(triggerTrack); |
1317 | } // board is fired | |
e6b25a6e | 1318 | } // end of loop on Local Trigger |
8d0843c6 | 1319 | } |