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[u/mrichter/AliRoot.git] / MUON / AliMUONVTrackReconstructor.cxx
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8d0843c6 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
3d1463c8 18//-----------------------------------------------------------------------------
c4ee792d 19/// \class AliMUONVTrackReconstructor
06ca6d7b 20/// Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor)
21///
22/// This class contains as data:
23/// * a pointer to the array of hits to be reconstructed (the event)
06ca6d7b 24/// * a pointer to the array of reconstructed tracks
25///
26/// It contains as methods, among others:
27/// * EventReconstruct to build the muon tracks
28/// * EventReconstructTrigger to build the trigger tracks
29///
dfb547bf 30/// Several options and adjustable parameters are available for both Kalman and Original
31/// tracking algorithms (hard coded for the moment in AliMUONVTrackReconstructor.cxx):
32/// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be
33/// attached to the track candidate and to select good tracks.
019df241 34/// - *fgkMakeTrackCandidatesFast* : if this flag is set to 'true', the track candidates
35/// are made assuming linear propagation between stations 4 and 5.
dfb547bf 36/// - *fgkTrackAllTracks* : according to the value of this flag, in case that several
37/// new clusters pass the quality cut, either we consider all the possibilities
38/// (duplicating tracks) or we attach only the best cluster.
39/// - *fgkRecoverTracks* : if this flag is set to 'true', we try to recover the tracks
40/// lost during the tracking by removing the worst of the 2 clusters attached in the
41/// previous station.
42/// - *fgkImproveTracks* : if this flag is set to 'true', we try to improve the quality
43/// of the tracks at the end of the tracking by removing clusters that do not pass
44/// new quality cut (within the limit that we must keep at least one cluster per
45/// the station).
46/// - *fgkSigmaToCutForImprovement* : quality cut used when we try to improve the
47/// quality of the tracks.
48///
c4ee792d 49/// \author Philippe Pillot
3d1463c8 50//-----------------------------------------------------------------------------
8d0843c6 51
8d0843c6 52#include "AliMUONVTrackReconstructor.h"
7ec3b9cf 53
8d0843c6 54#include "AliMUONConstants.h"
ea94c18b 55#include "AliMUONRawCluster.h"
8d0843c6 56#include "AliMUONHitForRec.h"
208f139e 57#include "AliMUONObjectPair.h"
8d0843c6 58#include "AliMUONTriggerTrack.h"
e1a10d41 59#include "AliMUONTriggerCircuit.h"
8d0843c6 60#include "AliMUONLocalTrigger.h"
61#include "AliMUONGlobalTrigger.h"
8d0843c6 62#include "AliMUONTrack.h"
37827b29 63#include "AliMUONTrackParam.h"
64#include "AliMUONTrackExtrap.h"
7771752e 65#include "AliMUONTrackHitPattern.h"
7ec3b9cf 66#include "AliMUONVTrackStore.h"
67#include "AliMUONVClusterStore.h"
68#include "AliMUONRawCluster.h"
7ec3b9cf 69#include "AliMUONVTriggerStore.h"
70#include "AliMUONVTriggerTrackStore.h"
ea94c18b 71#include "AliMpDEManager.h"
72
73#include "AliLog.h"
74#include "AliTracker.h"
8d0843c6 75
4889d34c 76#include <TClonesArray.h>
77#include <TMath.h>
ea94c18b 78#include <TMatrixD.h>
79
80#include <Riostream.h>
4889d34c 81
78649106 82/// \cond CLASSIMP
8d0843c6 83ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context
78649106 84/// \endcond
8d0843c6 85
019df241 86
8d0843c6 87//************* Defaults parameters for reconstruction
88const Double_t AliMUONVTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0;
89const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxBendingMomentum = 3000.0;
208f139e 90const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxNormChi2MatchTrigger = 16.0;
019df241 91const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceBending = 2.;
92const Double_t AliMUONVTrackReconstructor::fgkMaxTrackingDistanceNonBending = 2.;
8d0843c6 93
ea94c18b 94const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForTracking = 6.0;
019df241 95const Bool_t AliMUONVTrackReconstructor::fgkMakeTrackCandidatesFast = kFALSE;
ea94c18b 96const Bool_t AliMUONVTrackReconstructor::fgkTrackAllTracks = kTRUE;
ea94c18b 97const Bool_t AliMUONVTrackReconstructor::fgkRecoverTracks = kTRUE;
98const Bool_t AliMUONVTrackReconstructor::fgkImproveTracks = kTRUE;
019df241 99const Double_t AliMUONVTrackReconstructor::fgkSigmaToCutForImprovement = 4.0;
ea94c18b 100
101
102 //__________________________________________________________________________
7ec3b9cf 103AliMUONVTrackReconstructor::AliMUONVTrackReconstructor()
8d0843c6 104 : TObject(),
105 fMinBendingMomentum(fgkDefaultMinBendingMomentum),
106 fMaxBendingMomentum(fgkDefaultMaxBendingMomentum),
208f139e 107 fMaxNormChi2MatchTrigger(fgkDefaultMaxNormChi2MatchTrigger),
8d0843c6 108 fHitsForRecPtr(0x0),
109 fNHitsForRec(0),
110 fNHitsForRecPerChamber(0x0),
111 fIndexOfFirstHitForRecPerChamber(0x0),
8d0843c6 112 fRecTracksPtr(0x0),
7ec3b9cf 113 fNRecTracks(0)
8d0843c6 114{
115 /// Constructor for class AliMUONVTrackReconstructor
8d0843c6 116 fNHitsForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()];
117 fIndexOfFirstHitForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()];
118
8d0843c6 119 // Memory allocation for the TClonesArray of hits for reconstruction
120 // Is 10000 the right size ????
121 fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000);
ea94c18b 122
123 // Memory allocation for the TClonesArray of reconstructed tracks
124 fRecTracksPtr = new TClonesArray("AliMUONTrack", 10);
7ec3b9cf 125
208f139e 126 // set the magnetic field for track extrapolations
8d0843c6 127 const AliMagF* kField = AliTracker::GetFieldMap();
128 if (!kField) AliFatal("No field available");
37827b29 129 AliMUONTrackExtrap::SetField(kField);
8d0843c6 130}
131
132 //__________________________________________________________________________
ea94c18b 133AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor()
8d0843c6 134{
135 /// Destructor for class AliMUONVTrackReconstructor
8d0843c6 136 delete [] fNHitsForRecPerChamber;
137 delete [] fIndexOfFirstHitForRecPerChamber;
8d0843c6 138 delete fHitsForRecPtr;
ea94c18b 139 delete fRecTracksPtr;
8d0843c6 140}
141
ea94c18b 142 //__________________________________________________________________________
143void AliMUONVTrackReconstructor::ResetHitsForRec()
144{
145 /// To reset the TClonesArray of HitsForRec,
146 /// and the number of HitForRec and the index of the first HitForRec per chamber
147 if (fHitsForRecPtr) fHitsForRecPtr->Clear("C");
148 fNHitsForRec = 0;
149 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
150 fNHitsForRecPerChamber[ch] = 0;
151 fIndexOfFirstHitForRecPerChamber[ch] = 0;
152 }
153}
154
155 //__________________________________________________________________________
156void AliMUONVTrackReconstructor::ResetTracks()
157{
158 /// To reset the TClonesArray of reconstructed tracks
159 if (fRecTracksPtr) fRecTracksPtr->Clear("C");
160 fNRecTracks = 0;
161 return;
162}
163
164 //__________________________________________________________________________
165void AliMUONVTrackReconstructor::EventReconstruct(const AliMUONVClusterStore& clusterStore, AliMUONVTrackStore& trackStore)
166{
167 /// To reconstruct one event
168 AliDebug(1,"");
169
170 ResetTracks();
171 ResetHitsForRec();
172 AddHitsForRecFromRawClusters(clusterStore);
173 MakeTracks();
174
175 // Add tracks to MUON data container
176 for (Int_t i=0; i<fNRecTracks; ++i)
177 {
178 AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i);
179 trackStore.Add(*track);
180 }
181}
182
183 //__________________________________________________________________________
184void AliMUONVTrackReconstructor::AddHitsForRecFromRawClusters(const AliMUONVClusterStore& clusterStore)
7ec3b9cf 185{
186 /// Build internal array of hit for rec from clusterStore
187
188 TIter next(clusterStore.CreateIterator());
189 AliMUONRawCluster* clus(0x0);
190 Int_t iclus(0);
191
192 while ( ( clus = static_cast<AliMUONRawCluster*>(next()) ) )
193 {
194 // new AliMUONHitForRec from raw cluster
195 // and increment number of AliMUONHitForRec's (total and in chamber)
196 AliMUONHitForRec* hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus);
197 fNHitsForRec++;
198 // more information into HitForRec
199 hitForRec->SetBendingReso2(clus->GetErrY() * clus->GetErrY());
200 hitForRec->SetNonBendingReso2(clus->GetErrX() * clus->GetErrX());
201 // original raw cluster
202 Int_t ch = AliMpDEManager::GetChamberId(clus->GetDetElemId());
203 hitForRec->SetChamberNumber(ch);
204 hitForRec->SetHitNumber(iclus);
205 // Z coordinate of the raw cluster (cm)
206 hitForRec->SetZ(clus->GetZ(0));
207 if (AliLog::GetDebugLevel("MUON","AliMUONTrackReconstructor") >= 3) {
208 cout << "Chamber " << ch <<" raw cluster " << iclus << " : " << endl;
209 clus->Print("full");
210 cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl;
211 hitForRec->Print("full");
212 }
213 ++iclus;
214 } // end of chamber loop
215
216 SortHitsForRecWithIncreasingChamber();
217
218 AliDebug(1,"End of AddHitsForRecFromRawClusters");
219
220 if (AliLog::GetGlobalDebugLevel() > 0)
221 {
222 AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec));
223 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
224 {
225 AliDebug(1, Form("Chamber(0...): %d",ch));
226 AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch]));
227 AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch]));
228 for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch];
229 hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch];
230 hit++) {
231 AliDebug(1, Form("HitForRec index(0...): %d",hit));
232 ((*fHitsForRecPtr)[hit])->Dump();
233 }
234 }
235 }
236}
237
8d0843c6 238 //__________________________________________________________________________
239void AliMUONVTrackReconstructor::SortHitsForRecWithIncreasingChamber()
240{
241 /// Sort HitsForRec's in increasing order with respect to chamber number.
242 /// Uses the function "Compare".
243 /// Update the information for HitsForRec per chamber too.
244 Int_t ch, nhits, prevch;
245 fHitsForRecPtr->Sort();
246 for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
247 fNHitsForRecPerChamber[ch] = 0;
248 fIndexOfFirstHitForRecPerChamber[ch] = 0;
249 }
250 prevch = 0; // previous chamber
251 nhits = 0; // number of hits in current chamber
252 // Loop over HitsForRec
253 for (Int_t hit = 0; hit < fNHitsForRec; hit++) {
254 // chamber number (0...)
255 ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber();
256 // increment number of hits in current chamber
257 (fNHitsForRecPerChamber[ch])++;
258 // update index of first HitForRec in current chamber
259 // if chamber number different from previous one
260 if (ch != prevch) {
261 fIndexOfFirstHitForRecPerChamber[ch] = hit;
262 prevch = ch;
263 }
264 }
265 return;
266}
267
268 //__________________________________________________________________________
ea94c18b 269void AliMUONVTrackReconstructor::MakeTracks()
270{
271 /// To make the tracks from the list of segments and points in all stations
272 AliDebug(1,"Enter MakeTracks");
273 // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
274 MakeTrackCandidates();
275 if (fRecTracksPtr->GetEntriesFast() == 0) return;
276 // Follow tracks in stations(1..) 3, 2 and 1
277 FollowTracks();
278 // Improve the reconstructed tracks
279 if (fgkImproveTracks) ImproveTracks();
280 // Remove double tracks
281 RemoveDoubleTracks();
282 // Fill AliMUONTrack data members
283 Finalize();
284}
285
286 //__________________________________________________________________________
208f139e 287TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(Int_t station)
8d0843c6 288{
208f139e 289 /// To make the list of segments in station(0..) "Station" from the list of hits to be reconstructed.
290 /// Return a new TClonesArray of segments.
291 /// It is the responsibility of the user to delete it afterward.
292 AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",station));
293
8d0843c6 294 AliMUONHitForRec *hit1Ptr, *hit2Ptr;
208f139e 295 AliMUONObjectPair *segment;
22ccc301 296 Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning
7ec3b9cf 297 // first and second chambers (0...) in the station
208f139e 298 Int_t ch1 = 2 * station;
8d0843c6 299 Int_t ch2 = ch1 + 1;
7ec3b9cf 300
208f139e 301 // list of segments
302 TClonesArray *segments = new TClonesArray("AliMUONObjectPair", fNHitsForRecPerChamber[ch2]);
7ec3b9cf 303 segments->SetOwner(kTRUE);
304
208f139e 305 // Loop over HitForRec's in the first chamber of the station
8d0843c6 306 for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1];
307 hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1];
7ec3b9cf 308 hit1++)
309 {
8d0843c6 310 // pointer to the HitForRec
311 hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]);
208f139e 312 // Loop over HitsForRec's in the second chamber of the station
8d0843c6 313 for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2];
7ec3b9cf 314 hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2];
315 hit2++)
316 {
8d0843c6 317 // pointer to the HitForRec
318 hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]);
7ec3b9cf 319 if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0. )
320 {
22ccc301 321 // bending slope
208f139e 322 bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / (hit1Ptr->GetZ() - hit2Ptr->GetZ());
323 // impact parameter
324 impactParam = hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope;
325 // absolute value of bending momentum
7ec3b9cf 326 bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam));
327 } else
328 {
208f139e 329 AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): no segment created");
330 continue;
331 }
22ccc301 332 // check for bending momentum within tolerances
7ec3b9cf 333 if ((bendingMomentum < fMaxBendingMomentum) && (bendingMomentum > fMinBendingMomentum))
334 {
335 // make new segment
336 segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(hit1Ptr, hit2Ptr, kFALSE, kFALSE);
337 if (AliLog::GetGlobalDebugLevel() > 1) {
338 cout << "segmentIndex(0...): " << segments->GetLast() << endl;
339 segment->Dump();
340 cout << "HitForRec in first chamber" << endl;
341 hit1Ptr->Dump();
342 cout << "HitForRec in second chamber" << endl;
343 hit2Ptr->Dump();
344 }
8d0843c6 345 }
346 } //for (Int_t hit2
347 } // for (Int_t hit1...
208f139e 348 AliDebug(1,Form("Station: %d NSegments: %d ", station, segments->GetEntriesFast()));
349 return segments;
8d0843c6 350}
351
ea94c18b 352 //__________________________________________________________________________
353void AliMUONVTrackReconstructor::RemoveIdenticalTracks()
354{
355 /// To remove identical tracks:
356 /// Tracks are considered identical if they have all their hits in common.
357 /// One keeps the track with the larger number of hits if need be
358 AliMUONTrack *track1, *track2, *trackToRemove;
359 Int_t hitsInCommon, nHits1, nHits2;
360 Bool_t removedTrack1;
361 // Loop over first track of the pair
362 track1 = (AliMUONTrack*) fRecTracksPtr->First();
363 while (track1) {
364 removedTrack1 = kFALSE;
365 nHits1 = track1->GetNTrackHits();
366 // Loop over second track of the pair
367 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
368 while (track2) {
369 nHits2 = track2->GetNTrackHits();
370 // number of hits in common between two tracks
371 hitsInCommon = track1->HitsInCommon(track2);
372 // check for identical tracks
373 if ((hitsInCommon == nHits1) || (hitsInCommon == nHits2)) {
374 // decide which track to remove
375 if (nHits2 > nHits1) {
376 // remove track1 and continue the first loop with the track next to track1
377 trackToRemove = track1;
378 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
379 fRecTracksPtr->Remove(trackToRemove);
380 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
381 fNRecTracks--;
382 removedTrack1 = kTRUE;
383 break;
384 } else {
385 // remove track2 and continue the second loop with the track next to track2
386 trackToRemove = track2;
387 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
388 fRecTracksPtr->Remove(trackToRemove);
389 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
390 fNRecTracks--;
391 }
392 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
393 } // track2
394 if (removedTrack1) continue;
395 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
396 } // track1
397 return;
398}
399
400 //__________________________________________________________________________
401void AliMUONVTrackReconstructor::RemoveDoubleTracks()
402{
403 /// To remove double tracks:
404 /// Tracks are considered identical if more than half of the hits of the track
405 /// which has the smaller number of hits are in common with the other track.
406 /// Among two identical tracks, one keeps the track with the larger number of hits
407 /// or, if these numbers are equal, the track with the minimum chi2.
408 AliMUONTrack *track1, *track2, *trackToRemove;
409 Int_t hitsInCommon, nHits1, nHits2;
410 Bool_t removedTrack1;
411 // Loop over first track of the pair
412 track1 = (AliMUONTrack*) fRecTracksPtr->First();
413 while (track1) {
414 removedTrack1 = kFALSE;
415 nHits1 = track1->GetNTrackHits();
416 // Loop over second track of the pair
417 track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
418 while (track2) {
419 nHits2 = track2->GetNTrackHits();
420 // number of hits in common between two tracks
421 hitsInCommon = track1->HitsInCommon(track2);
422 // check for identical tracks
423 if (((nHits1 < nHits2) && (2 * hitsInCommon > nHits1)) || (2 * hitsInCommon > nHits2)) {
424 // decide which track to remove
425 if ((nHits1 > nHits2) || ((nHits1 == nHits2) && (track1->GetFitFMin() <= track2->GetFitFMin()))) {
426 // remove track2 and continue the second loop with the track next to track2
427 trackToRemove = track2;
428 track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
429 fRecTracksPtr->Remove(trackToRemove);
430 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
431 fNRecTracks--;
432 } else {
433 // else remove track1 and continue the first loop with the track next to track1
434 trackToRemove = track1;
435 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
436 fRecTracksPtr->Remove(trackToRemove);
437 fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
438 fNRecTracks--;
439 removedTrack1 = kTRUE;
440 break;
441 }
442 } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
443 } // track2
444 if (removedTrack1) continue;
445 track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
446 } // track1
447 return;
448}
449
450 //__________________________________________________________________________
451Double_t AliMUONVTrackReconstructor::TryOneHitForRec(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec,
452 AliMUONTrackParam &trackParamAtHit, Bool_t updatePropagator)
453{
454/// Test the compatibility between the track and the hitForRec (using trackParam's covariance matrix):
455/// return the corresponding Chi2
456/// return trackParamAtHit
457
ea94c18b 458 // extrapolate track parameters and covariances at the z position of the tested hit
019df241 459 trackParamAtHit = trackParam;
460 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtHit, hitForRec->GetZ(), updatePropagator);
ea94c18b 461
462 // set pointer to hit into trackParamAtHit
463 trackParamAtHit.SetHitForRecPtr(hitForRec);
464
465 // Set differences between trackParam and hitForRec in the bending and non bending directions
019df241 466 Double_t dX = hitForRec->GetNonBendingCoor() - trackParamAtHit.GetNonBendingCoor();
467 Double_t dY = hitForRec->GetBendingCoor() - trackParamAtHit.GetBendingCoor();
ea94c18b 468
019df241 469 // Calculate errors and covariances
ea94c18b 470 const TMatrixD& kParamCov = trackParamAtHit.GetCovariances();
019df241 471 Double_t sigma2X = kParamCov(0,0) + hitForRec->GetNonBendingReso2();
472 Double_t sigma2Y = kParamCov(2,2) + hitForRec->GetBendingReso2();
473
474 // Compute chi2
475 return dX * dX / sigma2X + dY * dY / sigma2Y;
476
477}
478
479 //__________________________________________________________________________
480Bool_t AliMUONVTrackReconstructor::TryOneHitForRecFast(const AliMUONTrackParam &trackParam, AliMUONHitForRec* hitForRec)
481{
482/// Test the compatibility between the track and the hitForRec within a wide fix window
483/// assuming linear propagation of the track:
484/// return kTRUE if they are compatibles
485
486 Double_t dZ = hitForRec->GetZ() - trackParam.GetZ();
487 Double_t dX = hitForRec->GetNonBendingCoor() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ);
488 Double_t dY = hitForRec->GetBendingCoor() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ);
489
490 if (TMath::Abs(dX) > fgkMaxTrackingDistanceNonBending || TMath::Abs(dY) > fgkMaxTrackingDistanceBending) return kFALSE;
491
492 return kTRUE;
493
494}
495
496 //__________________________________________________________________________
497Double_t AliMUONVTrackReconstructor::TryTwoHitForRecFast(const AliMUONTrackParam &trackParamAtHit1, AliMUONHitForRec* hitForRec2,
498 AliMUONTrackParam &trackParamAtHit2)
499{
500/// Test the compatibility between the track and the 2 hitForRec together (using trackParam's covariance matrix)
501/// assuming linear propagation between the two hits:
502/// return the corresponding Chi2 accounting for covariances between the 2 hitForRec
503/// return trackParamAtHit1 & 2
504
505 // extrapolate linearly track parameters at the z position of the second hit
506 trackParamAtHit2 = trackParamAtHit1;
507 AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtHit2, hitForRec2->GetZ());
508
509 // set pointer to hit2 into trackParamAtHit2
510 trackParamAtHit2.SetHitForRecPtr(hitForRec2);
511
512 // Set differences between track and hitForRec in the bending and non bending directions
513 AliMUONHitForRec* hitForRec1 = trackParamAtHit1.GetHitForRecPtr();
514 Double_t dX1 = hitForRec1->GetNonBendingCoor() - trackParamAtHit1.GetNonBendingCoor();
515 Double_t dX2 = hitForRec2->GetNonBendingCoor() - trackParamAtHit2.GetNonBendingCoor();
516 Double_t dY1 = hitForRec1->GetBendingCoor() - trackParamAtHit1.GetBendingCoor();
517 Double_t dY2 = hitForRec2->GetBendingCoor() - trackParamAtHit2.GetBendingCoor();
518
519 // Calculate errors and covariances
520 const TMatrixD& kParamCov1 = trackParamAtHit1.GetCovariances();
521 const TMatrixD& kParamCov2 = trackParamAtHit2.GetCovariances();
522 Double_t dZ = trackParamAtHit2.GetZ() - trackParamAtHit1.GetZ();
523 Double_t sigma2X1 = kParamCov1(0,0) + hitForRec1->GetNonBendingReso2();
524 Double_t sigma2X2 = kParamCov2(0,0) + hitForRec2->GetNonBendingReso2();
525 Double_t covX1X2 = kParamCov1(0,0) + dZ * kParamCov1(0,1);
526 Double_t sigma2Y1 = kParamCov1(2,2) + hitForRec1->GetBendingReso2();
527 Double_t sigma2Y2 = kParamCov2(2,2) + hitForRec2->GetBendingReso2();
528 Double_t covY1Y2 = kParamCov1(2,2) + dZ * kParamCov1(2,3);
529
530 // Compute chi2
531 Double_t detX = sigma2X1 * sigma2X2 - covX1X2 * covX1X2;
532 Double_t detY = sigma2Y1 * sigma2Y2 - covY1Y2 * covY1Y2;
533 if (detX == 0. || detY == 0.) return 1.e10;
534 return (dX1 * dX1 * sigma2X2 + dX2 * dX2 * sigma2X1 - 2. * dX1 * dX2 * covX1X2) / detX
535 + (dY1 * dY1 * sigma2Y2 + dY2 * dY2 * sigma2Y1 - 2. * dY1 * dY2 * covY1Y2) / detY;
536
537}
538
539 //__________________________________________________________________________
540Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, Int_t nextStation)
541{
542 /// Follow trackCandidate in station(0..) nextStation assuming linear propagation, and search for compatible HitForRec(s)
543 /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks:
544 /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of
545 /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure.
546 /// Remove the obsolete "trackCandidate" at the end.
547 /// kFALSE: add only the best hit(s) to the "trackCandidate". Try to add a couple of hits in priority.
548 /// return kTRUE if new hits have been found (otherwise return kFALSE)
549 AliDebug(1,Form("Enter FollowLinearTrackInStation(1..) %d", nextStation+1));
550
551 // Order the chamber according to the propagation direction (tracking starts with chamber 2):
552 // - nextStation == station(1...) 5 => forward propagation
553 // - nextStation < station(1...) 5 => backward propagation
554 Int_t ch1, ch2;
555 if (nextStation==4) {
556 ch1 = 2*nextStation+1;
557 ch2 = 2*nextStation;
ea94c18b 558 } else {
019df241 559 ch1 = 2*nextStation;
560 ch2 = 2*nextStation+1;
ea94c18b 561 }
562
019df241 563 Double_t chi2WithOneHitForRec = 1.e10;
564 Double_t chi2WithTwoHitForRec = 1.e10;
565 Double_t maxChi2WithOneHitForRec = 2. * fgkSigmaToCutForTracking * fgkSigmaToCutForTracking; // 2 because 2 quantities in chi2
566 Double_t maxChi2WithTwoHitForRec = 4. * fgkSigmaToCutForTracking * fgkSigmaToCutForTracking; // 4 because 4 quantities in chi2
567 Double_t bestChi2WithOneHitForRec = maxChi2WithOneHitForRec;
568 Double_t bestChi2WithTwoHitForRec = maxChi2WithTwoHitForRec;
569 Bool_t foundOneHit = kFALSE;
570 Bool_t foundTwoHits = kFALSE;
571 AliMUONTrack *newTrack = 0x0;
572 AliMUONHitForRec *hitForRecCh1, *hitForRecCh2;
573 AliMUONTrackParam extrapTrackParamAtHit1;
574 AliMUONTrackParam extrapTrackParamAtHit2;
575 AliMUONTrackParam bestTrackParamAtHit1;
576 AliMUONTrackParam bestTrackParamAtHit2;
577 Bool_t *hitForRecCh1Used = new Bool_t[fNHitsForRecPerChamber[ch1]];
578 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) hitForRecCh1Used[hit1] = kFALSE;
579
580 // Get track parameters
581 AliMUONTrackParam trackParam(*(AliMUONTrackParam*)trackCandidate.GetTrackParamAtHit()->First());
582
583 // Add MCS effect
584 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
585
586 // Printout for debuging
587 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
588 cout << "FollowLinearTrackInStation: look for hits in chamber(1..): " << ch2+1 << endl;
589 }
590
591 // look for candidates in chamber 2
592 for (Int_t hit2 = 0; hit2 < fNHitsForRecPerChamber[ch2]; hit2++) {
593
594 hitForRecCh2 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch2]+hit2);
595
596 // try to add the current hit fast
597 if (!TryOneHitForRecFast(trackParam, hitForRecCh2)) continue;
598
599 // try to add the current hit accuratly
600 extrapTrackParamAtHit2 = trackParam;
601 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit2, hitForRecCh2->GetZ());
602 chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit2, hitForRecCh2, extrapTrackParamAtHit2);
603
604 // if good chi2 then try to attach a hitForRec in the other chamber too
605 if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) {
606 Bool_t foundSecondHit = kFALSE;
607
608 // Printout for debuging
609 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
610 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch2+1
611 << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl;
612 cout << " look for second hits in chamber(1..): " << ch1+1 << " ..." << endl;
613 }
614
615 // add MCS effect
616 AliMUONTrackExtrap::AddMCSEffect(&extrapTrackParamAtHit2,AliMUONConstants::ChamberThicknessInX0(),1.);
617
618 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) {
619
620 hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1);
621
622 // try to add the current hit fast
623 if (!TryOneHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1)) continue;
624
625 // try to add the current hit in addition to the one found on the previous chamber
626 chi2WithTwoHitForRec = TryTwoHitForRecFast(extrapTrackParamAtHit2, hitForRecCh1, extrapTrackParamAtHit1);
627
628 // if good chi2 then consider to add the 2 hitForRec to the "trackCandidate"
629 if (chi2WithTwoHitForRec < maxChi2WithTwoHitForRec) {
630 foundSecondHit = kTRUE;
631 foundTwoHits = kTRUE;
632
633 // Printout for debuging
634 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
635 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1
636 << " (Chi2 = " << chi2WithTwoHitForRec << ")" << endl;
637 }
638
639 if (fgkTrackAllTracks) {
640 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
641 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
642 extrapTrackParamAtHit1.SetRemovable(kTRUE);
643 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1);
644 extrapTrackParamAtHit2.SetRemovable(kTRUE);
645 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2);
646 newTrack->GetTrackParamAtHit()->Sort();
647 fNRecTracks++;
648
649 // Tag hitForRecCh1 as used
650 hitForRecCh1Used[hit1] = kTRUE;
651
652 // Printout for debuging
653 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
654 cout << "FollowLinearTrackInStation: added two hits in station(1..): " << nextStation+1 << endl;
655 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
656 }
657
658 } else if (chi2WithTwoHitForRec < bestChi2WithTwoHitForRec) {
659 // keep track of the best couple of hits
660 bestChi2WithTwoHitForRec = chi2WithTwoHitForRec;
661 bestTrackParamAtHit1 = extrapTrackParamAtHit1;
662 bestTrackParamAtHit2 = extrapTrackParamAtHit2;
663 }
664
665 }
666
667 }
668
669 // if no hitForRecCh1 found then consider to add hitForRecCh2 only
670 if (!foundSecondHit) {
671 foundOneHit = kTRUE;
672
673 if (fgkTrackAllTracks) {
674 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
675 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
676 extrapTrackParamAtHit2.SetRemovable(kFALSE);
677 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit2,hitForRecCh2);
678 newTrack->GetTrackParamAtHit()->Sort();
679 fNRecTracks++;
680
681 // Printout for debuging
682 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
683 cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch2+1 << endl;
684 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
685 }
686
687 } else if (!foundTwoHits && chi2WithOneHitForRec < bestChi2WithOneHitForRec) {
688 // keep track of the best single hitForRec except if a couple of hits has already been found
689 bestChi2WithOneHitForRec = chi2WithOneHitForRec;
690 bestTrackParamAtHit1 = extrapTrackParamAtHit2;
691 }
692
693 }
694
695 }
696
697 }
698
699 // look for candidates in chamber 1 not already attached to a track
700 // if we want to keep all possible tracks or if no good couple of hitForRec has been found
701 if (fgkTrackAllTracks || !foundTwoHits) {
702
703 // Printout for debuging
704 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
705 cout << "FollowLinearTrackInStation: look for single hits in chamber(1..): " << ch1+1 << endl;
706 }
707
708 //Extrapolate trackCandidate to chamber "ch2"
709 AliMUONTrackExtrap::LinearExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(ch2));
710
711 // add MCS effect for next step
712 AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
713
714 for (Int_t hit1 = 0; hit1 < fNHitsForRecPerChamber[ch1]; hit1++) {
715
716 hitForRecCh1 = (AliMUONHitForRec*) fHitsForRecPtr->UncheckedAt(fIndexOfFirstHitForRecPerChamber[ch1]+hit1);
717
718 if (hitForRecCh1Used[hit1]) continue; // Skip hitForRec already used
719
720 // try to add the current hit fast
721 if (!TryOneHitForRecFast(trackParam, hitForRecCh1)) continue;
722
723 // try to add the current hit accuratly
724 extrapTrackParamAtHit1 = trackParam;
725 AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtHit1, hitForRecCh1->GetZ());
726 chi2WithOneHitForRec = TryOneHitForRec(extrapTrackParamAtHit1, hitForRecCh1, extrapTrackParamAtHit1);
727
728 // if good chi2 then consider to add hitForRecCh1
729 // We do not try to attach a hitForRec in the other chamber too since it has already been done above
730 if (chi2WithOneHitForRec < maxChi2WithOneHitForRec) {
731 foundOneHit = kTRUE;
732
733 // Printout for debuging
734 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
735 cout << "FollowLinearTrackInStation: found one hit in chamber(1..): " << ch1+1
736 << " (Chi2 = " << chi2WithOneHitForRec << ")" << endl;
737 }
738
739 if (fgkTrackAllTracks) {
740 // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new hitForRec's
741 newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
742 extrapTrackParamAtHit1.SetRemovable(kFALSE);
743 newTrack->AddTrackParamAtHit(&extrapTrackParamAtHit1,hitForRecCh1);
744 newTrack->GetTrackParamAtHit()->Sort();
745 fNRecTracks++;
746
747 // Printout for debuging
748 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
749 cout << "FollowLinearTrackInStation: added one hit in chamber(1..): " << ch1+1 << endl;
750 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
751 }
752
753 } else if (chi2WithOneHitForRec < bestChi2WithOneHitForRec) {
754 // keep track of the best single hitForRec except if a couple of hits has already been found
755 bestChi2WithOneHitForRec = chi2WithOneHitForRec;
756 bestTrackParamAtHit1 = extrapTrackParamAtHit1;
757 }
758
759 }
760
761 }
762
763 }
764
765 // fill out the best track if required else clean up the fRecTracksPtr array
766 if (!fgkTrackAllTracks) {
767 if (foundTwoHits) {
768 bestTrackParamAtHit1.SetRemovable(kTRUE);
769 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr());
770 bestTrackParamAtHit2.SetRemovable(kTRUE);
771 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit2,bestTrackParamAtHit2.GetHitForRecPtr());
772 trackCandidate.GetTrackParamAtHit()->Sort();
773
774 // Printout for debuging
775 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
776 cout << "FollowLinearTrackInStation: added the two best hits in station(1..): " << nextStation+1 << endl;
777 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
778 }
779
780 } else if (foundOneHit) {
781 bestTrackParamAtHit1.SetRemovable(kFALSE);
782 trackCandidate.AddTrackParamAtHit(&bestTrackParamAtHit1,bestTrackParamAtHit1.GetHitForRecPtr());
783 trackCandidate.GetTrackParamAtHit()->Sort();
784
785 // Printout for debuging
786 if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
787 cout << "FollowLinearTrackInStation: added the best hit in chamber(1..): " << bestTrackParamAtHit1.GetHitForRecPtr()->GetChamberNumber()+1 << endl;
788 if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
789 }
790
dd230855 791 } else {
792 delete [] hitForRecCh1Used;
793 return kFALSE;
794 }
019df241 795
796 } else if (foundOneHit || foundTwoHits) {
797
798 // remove obsolete track
799 fRecTracksPtr->Remove(&trackCandidate);
800 fNRecTracks--;
801
dd230855 802 } else {
803 delete [] hitForRecCh1Used;
804 return kFALSE;
805 }
ea94c18b 806
dd230855 807 delete [] hitForRecCh1Used;
019df241 808 return kTRUE;
ea94c18b 809
810}
811
812 //__________________________________________________________________________
7ec3b9cf 813void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(AliMUONVTrackStore& trackStore,
814 const AliMUONVTriggerTrackStore& triggerTrackStore,
815 const AliMUONVTriggerStore& triggerStore,
816 const AliMUONTrackHitPattern& trackHitPattern)
8d0843c6 817{
818 /// Try to match track from tracking system with trigger track
06ca6d7b 819 static const Double_t kDistSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY
208f139e 820
7771752e 821 Int_t matchTrigger;
7ec3b9cf 822 Int_t loTrgNum(-1);
8d0843c6 823 Double_t distTriggerTrack[3];
208f139e 824 Double_t xTrack, yTrack, ySlopeTrack, chi2MatchTrigger, minChi2MatchTrigger, chi2;
7ec3b9cf 825
826 TIter itTrack(trackStore.CreateIterator());
827 AliMUONTrack* track;
8d0843c6 828
7ec3b9cf 829 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
830 {
423b32ca 831 matchTrigger = 0;
8d0843c6 832 chi2MatchTrigger = 0.;
c6ba19f7 833 loTrgNum = -1;
7771752e 834 Int_t doubleMatch=-1; // Check if track matches 2 trigger tracks
835 Double_t doubleChi2 = -1.;
7ec3b9cf 836
837 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtHit()->Last())));
37827b29 838 AliMUONTrackExtrap::ExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber
8d0843c6 839
840 xTrack = trackParam.GetNonBendingCoor();
841 yTrack = trackParam.GetBendingCoor();
842 ySlopeTrack = trackParam.GetBendingSlope();
208f139e 843 minChi2MatchTrigger = 999.;
7ec3b9cf 844
845 AliMUONTriggerTrack *triggerTrack;
846 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
847 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
848 {
06ca6d7b 849 distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/kDistSigma[0];
850 distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/kDistSigma[1];
851 distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/kDistSigma[2];
208f139e 852 chi2 = 0.;
853 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar];
854 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
7ec3b9cf 855 if (chi2 < fMaxNormChi2MatchTrigger)
856 {
857 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
858 if (chi2 < minChi2MatchTrigger && chi2 < fMaxNormChi2MatchTrigger)
859 {
860 if(isDoubleTrack)
861 {
862 doubleMatch = loTrgNum;
863 doubleChi2 = chi2MatchTrigger;
864 }
865 minChi2MatchTrigger = chi2;
866 chi2MatchTrigger = chi2;
867 loTrgNum = triggerTrack->GetLoTrgNum();
868 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
869 matchTrigger=1;
870 if(locTrg->LoLpt()>0)matchTrigger=2;
871 if(locTrg->LoHpt()>0)matchTrigger=3;
872 }
873 else if(isDoubleTrack)
874 {
875 doubleMatch = triggerTrack->GetLoTrgNum();
876 doubleChi2 = chi2;
877 }
8d0843c6 878 }
8d0843c6 879 }
7ec3b9cf 880 if(doubleMatch>=0)
881 { // If two trigger tracks match, select the one passing more trigger cuts
882 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
883 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
884 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
885 {
886 if(locTrg1->LoHpt()>0)matchTrigger=3;
887 else matchTrigger=2;
888 loTrgNum = doubleMatch;
889 chi2MatchTrigger=doubleChi2;
890 }
7771752e 891 }
8d0843c6 892
893 track->SetMatchTrigger(matchTrigger);
c6ba19f7 894 track->SetLoTrgNum(loTrgNum);
8d0843c6 895 track->SetChi2MatchTrigger(chi2MatchTrigger);
7ec3b9cf 896
897 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
898
899 if (locTrg)
900 {
901 track->SetLocalTrigger(locTrg->LoCircuit(),
902 locTrg->LoStripX(),
903 locTrg->LoStripY(),
904 locTrg->LoDev(),
905 locTrg->LoLpt(),
906 locTrg->LoHpt());
907 }
908 }
909
910 trackHitPattern.GetHitPattern(trackStore,triggerStore);
8d0843c6 911}
912
ea94c18b 913 //__________________________________________________________________________
914void AliMUONVTrackReconstructor::EventReconstructTrigger(const AliMUONTriggerCircuit& circuit,
915 const AliMUONVTriggerStore& triggerStore,
916 AliMUONVTriggerTrackStore& triggerTrackStore)
8d0843c6 917{
71a2d3aa 918 /// To make the trigger tracks from Local Trigger
7ec3b9cf 919 AliDebug(1, "");
920
921 AliMUONGlobalTrigger* globalTrigger = triggerStore.Global();
e6b25a6e 922
7ec3b9cf 923 UChar_t gloTrigPat = 0;
e6b25a6e 924
7ec3b9cf 925 if (globalTrigger)
926 {
927 gloTrigPat = globalTrigger->GetGlobalResponse();
e6b25a6e 928 }
929
7ec3b9cf 930 TIter next(triggerStore.CreateIterator());
931 AliMUONLocalTrigger* locTrg(0x0);
8d0843c6 932
e6b25a6e 933 Float_t z11 = AliMUONConstants::DefaultChamberZ(10);
934 Float_t z21 = AliMUONConstants::DefaultChamberZ(12);
7cf63da6 935
7ec3b9cf 936 AliMUONTriggerTrack triggerTrack;
937
938 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
939 {
940 Bool_t xTrig=kFALSE;
941 Bool_t yTrig=kFALSE;
942
32ab62c9 943 Int_t localBoardId = locTrg->LoCircuit();
7ec3b9cf 944 if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 &&
945 locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X
946 else xTrig=kTRUE; // trigger in X
947 if (locTrg->LoTrigY()==1 &&
948 locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y
949 else yTrig = kTRUE; // trigger in Y
950
951 if (xTrig && yTrig)
952 { // make Trigger Track if trigger in X and Y
8b0baca4 953
32ab62c9 954 Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX());
7ec3b9cf 955 // need first to convert deviation to [0-30]
956 // (see AliMUONLocalTriggerBoard::LocalTrigger)
957 Int_t deviation = locTrg->LoDev();
958 Int_t sign = 0;
959 if ( !locTrg->LoSdev() && deviation ) sign=-1;
960 if ( !locTrg->LoSdev() && !deviation ) sign= 0;
961 if ( locTrg->LoSdev() == 1 ) sign=+1;
962 deviation *= sign;
963 deviation += 15;
964 Int_t stripX21 = locTrg->LoStripX()+deviation+1;
32ab62c9 965 Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21);
966 Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY());
7ec3b9cf 967
968 AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %f %f %f \n",locTrg->LoCircuit(),
969 locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11));
970
971 Float_t thetax = TMath::ATan2( x11 , z11 );
972 Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
973
974 triggerTrack.SetX11(x11);
975 triggerTrack.SetY11(y11);
976 triggerTrack.SetThetax(thetax);
977 triggerTrack.SetThetay(thetay);
978 triggerTrack.SetGTPattern(gloTrigPat);
32ab62c9 979 triggerTrack.SetLoTrgNum(localBoardId);
7ec3b9cf 980
981 triggerTrackStore.Add(triggerTrack);
982 } // board is fired
e6b25a6e 983 } // end of loop on Local Trigger
8d0843c6 984}
ea94c18b 985