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7771752e | 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 | ||
ea94c18b | 16 | /* $Id$ */ |
17 | ||
18 | ||
3d1463c8 | 19 | //----------------------------------------------------------------------------- |
7771752e | 20 | /// \class AliMUONTrackHitPattern |
21 | /// | |
22 | /// This class propagates tracks to trigger chambers | |
683cb6c5 | 23 | /// searching for matching trigger tracks and fired strips. |
7771752e | 24 | /// |
25 | /// To each track, a hit pattern for trigger chambers is set. | |
26 | /// The hit pattern is a UShort_t with 8 bits used: | |
fda59e58 | 27 | /// <pre> |
7771752e | 28 | /// 1 1 0 1 1 1 0 1 |
29 | /// | | | | |
30 | /// ----------- ------------ | |
31 | /// chamber: 11 12 13 14 | 11 12 13 14 | |
32 | /// cathode: bending | non-bending | |
fda59e58 | 33 | /// </pre> |
7771752e | 34 | /// The main method is: |
683cb6c5 | 35 | /// * ExecuteValidation |
7771752e | 36 | /// |
37 | /// \author Diego Stocco | |
3d1463c8 | 38 | //----------------------------------------------------------------------------- |
7771752e | 39 | |
40 | ||
41 | #include "AliMUONTrackHitPattern.h" | |
7ec3b9cf | 42 | |
7771752e | 43 | #include "AliMUONConstants.h" |
7ec3b9cf | 44 | #include "AliMUONVDigit.h" |
45 | #include "AliMUONDigitMaker.h" | |
46 | #include "AliMUONDigitStoreV1.h" | |
7771752e | 47 | #include "AliMUONGeometryTransformer.h" |
7771752e | 48 | #include "AliMUONLocalTrigger.h" |
7771752e | 49 | #include "AliMUONLocalTriggerBoard.h" |
7ec3b9cf | 50 | #include "AliMUONTrack.h" |
51 | #include "AliMUONTrackExtrap.h" | |
52 | #include "AliMUONTrackParam.h" | |
53 | #include "AliMUONVTrackStore.h" | |
54 | #include "AliMUONVTriggerStore.h" | |
7771752e | 55 | #include "AliMpPad.h" |
7771752e | 56 | #include "AliMpSegmentation.h" |
7ec3b9cf | 57 | #include "AliMpVSegmentation.h" |
fda59e58 | 58 | #include "AliMpDEManager.h" |
59 | #include "AliMUONReconstructor.h" | |
60 | #include "AliMUONRecoParam.h" | |
683cb6c5 | 61 | #include "AliMUONTriggerTrack.h" |
62 | #include "AliMUONVTriggerTrackStore.h" | |
63 | ||
64 | #include "AliMpConstants.h" | |
ea94c18b | 65 | |
66 | #include "AliMagF.h" | |
67 | #include "AliLog.h" | |
7771752e | 68 | #include "AliTracker.h" |
ea94c18b | 69 | |
7771752e | 70 | #include <Riostream.h> |
7ec3b9cf | 71 | #include <TArrayS.h> |
7771752e | 72 | #include <TClonesArray.h> |
73 | #include <TMath.h> | |
74 | #include <TMatrixD.h> | |
683cb6c5 | 75 | #include <TROOT.h> |
76 | #include <TDirectory.h> | |
77 | #include <TFile.h> | |
78 | #include <TSystem.h> | |
79 | ||
80 | #include <cassert> | |
7771752e | 81 | |
82 | /// \cond CLASSIMP | |
83 | ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context | |
84 | /// \endcond | |
85 | ||
86 | ||
87 | //______________________________________________________________________________ | |
7ec3b9cf | 88 | AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONGeometryTransformer& transformer, |
89 | const AliMUONDigitMaker& digitMaker) | |
7771752e | 90 | : TObject(), |
7ec3b9cf | 91 | fTransformer(transformer), |
683cb6c5 | 92 | fDigitMaker(digitMaker), |
4a3224ff | 93 | fDeltaZ(0.0), |
94 | fTrigCovariance(0x0), | |
683cb6c5 | 95 | fkMaxDistance(99999.) |
7771752e | 96 | { |
97 | /// Default constructor | |
683cb6c5 | 98 | InitMembers(); |
7771752e | 99 | |
100 | // Set magnetic field | |
101 | const AliMagF* kField = AliTracker::GetFieldMap(); | |
102 | if (!kField) AliFatal("No field available"); | |
103 | AliMUONTrackExtrap::SetField(kField); | |
7771752e | 104 | } |
105 | ||
106 | ||
107 | //______________________________________________________________________________ | |
108 | AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void) | |
109 | { | |
7ec3b9cf | 110 | /// Destructor |
683cb6c5 | 111 | delete fTrigCovariance; |
7771752e | 112 | } |
113 | ||
114 | ||
115 | //______________________________________________________________________________ | |
683cb6c5 | 116 | void AliMUONTrackHitPattern::InitMembers() |
7771752e | 117 | { |
683cb6c5 | 118 | // |
119 | /// Initialize data members | |
120 | // | |
121 | fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10)); | |
122 | ||
123 | const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso(); | |
124 | const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso(); | |
125 | const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ; | |
126 | const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ; | |
127 | ||
128 | // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks | |
129 | fTrigCovariance = new TMatrixD(3,3); | |
130 | fTrigCovariance->Zero(); | |
131 | (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso; | |
132 | (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso; | |
133 | (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso; | |
134 | (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend; | |
683cb6c5 | 135 | } |
fda59e58 | 136 | |
7ec3b9cf | 137 | |
683cb6c5 | 138 | //_____________________________________________________________________________ |
139 | void AliMUONTrackHitPattern::CheckConstants() const | |
140 | { | |
141 | /// Check consistence of redefined constants | |
142 | ||
143 | assert(fgkNcathodes == AliMpConstants::NofCathodes()); | |
144 | assert(fgkNchambers == AliMpConstants::NofTriggerChambers()); | |
145 | assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes); | |
146 | } | |
147 | ||
148 | ||
149 | //______________________________________________________________________________ | |
150 | void AliMUONTrackHitPattern::ExecuteValidation(AliMUONVTrackStore& trackStore, | |
151 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
152 | const AliMUONVTriggerStore& triggerStore) const | |
153 | { | |
154 | // | |
155 | /// Main method: | |
156 | /// Loops on reco tracks, extrapolates them to trigger chambers | |
157 | /// and searches for matching trigger tracks and digits | |
158 | // | |
159 | ||
160 | AliMUONDigitStoreV1 digitStore; | |
161 | TriggerDigits(triggerStore,digitStore); | |
162 | ||
163 | ||
164 | TIter itTrack(trackStore.CreateIterator()); | |
165 | AliMUONTrack* track; | |
166 | ||
167 | const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh(); | |
168 | ||
169 | while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) ) | |
170 | { | |
171 | AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last()))); | |
172 | ||
173 | ApplyMCSCorrections(trackParam); | |
174 | AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber | |
175 | ||
176 | AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore); | |
177 | ||
178 | UShort_t pattern = GetHitPattern(trackParam, matchedTriggerTrack, digitStore); | |
179 | track->SetHitsPatternInTrigCh(pattern); | |
180 | } | |
181 | } | |
182 | ||
183 | ||
184 | //______________________________________________________________________________ | |
185 | AliMUONTriggerTrack * | |
186 | AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track, | |
187 | AliMUONTrackParam& trackParam, | |
188 | const AliMUONVTriggerTrackStore& triggerTrackStore, | |
189 | const AliMUONVTriggerStore& triggerStore) const | |
190 | { | |
191 | // | |
192 | /// Match track with trigger track | |
193 | // | |
194 | ||
195 | Int_t matchTrigger = 0; | |
196 | Int_t loTrgNum(-1); | |
197 | Double_t distTriggerTrack[3], sigma2[3]; | |
198 | Double_t chi2; | |
199 | Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.; | |
200 | Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks | |
201 | Double_t doubleChi2 = -1.; | |
202 | AliMUONTriggerTrack* doubleTriggerTrack = 0x0; | |
203 | AliMUONTriggerTrack* matchedTriggerTrack = 0x0; | |
7ec3b9cf | 204 | |
683cb6c5 | 205 | const TMatrixD& kParamCov = trackParam.GetCovariances(); |
7ec3b9cf | 206 | |
683cb6c5 | 207 | Double_t xTrack = trackParam.GetNonBendingCoor(); |
208 | Double_t yTrack = trackParam.GetBendingCoor(); | |
209 | Double_t ySlopeTrack = trackParam.GetBendingSlope(); | |
210 | ||
211 | // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks | |
212 | TMatrixD trackCov(3,3); | |
213 | trackCov.Zero(); | |
214 | trackCov(0,0) = kParamCov(0,0); | |
215 | trackCov(1,1) = kParamCov(2,2); | |
216 | trackCov(2,2) = kParamCov(3,3); | |
217 | trackCov(1,2) = kParamCov(2,3); | |
218 | trackCov(2,1) = kParamCov(3,2); | |
219 | ||
220 | TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance); | |
221 | ||
222 | Bool_t isCovOK = kTRUE; | |
223 | ||
224 | if (sumCov.Determinant() != 0) { | |
225 | sumCov.Invert(); | |
226 | } else { | |
227 | AliWarning(" Determinant = 0"); | |
228 | isCovOK = kFALSE; | |
229 | sigma2[0] = kParamCov(0,0); | |
230 | sigma2[1] = kParamCov(2,2); | |
231 | sigma2[2] = kParamCov(3,3); | |
232 | // sigma of distributions (trigger-track) X,Y,slopeY | |
233 | const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(), | |
234 | AliMUONConstants::TriggerBendingReso(), | |
235 | 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ}; | |
236 | for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar]; | |
237 | } | |
fda59e58 | 238 | |
683cb6c5 | 239 | AliMUONTriggerTrack *triggerTrack; |
240 | TIter itTriggerTrack(triggerTrackStore.CreateIterator()); | |
241 | while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) ) | |
242 | { | |
243 | distTriggerTrack[0] = triggerTrack->GetX11() - xTrack; | |
244 | distTriggerTrack[1] = triggerTrack->GetY11() - yTrack; | |
245 | distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack; | |
246 | ||
247 | if(isCovOK){ | |
248 | TMatrixD paramDiff(3,1); | |
249 | for(Int_t iVar = 0; iVar < 3; iVar++) | |
250 | paramDiff(iVar,0) = distTriggerTrack[iVar]; | |
251 | ||
252 | TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff); | |
253 | TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp); | |
254 | chi2 = chi2M(0,0); | |
255 | } | |
256 | else { | |
257 | chi2 = 0.; | |
258 | for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar]; | |
259 | } | |
fda59e58 | 260 | |
683cb6c5 | 261 | chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY) |
262 | if (chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger()) | |
7ec3b9cf | 263 | { |
683cb6c5 | 264 | Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.); |
265 | if (chi2 < minChi2MatchTrigger && chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger()) | |
7ec3b9cf | 266 | { |
683cb6c5 | 267 | if(isDoubleTrack) |
268 | { | |
269 | doubleMatch = loTrgNum; | |
270 | doubleChi2 = chi2MatchTrigger; | |
271 | doubleTriggerTrack = matchedTriggerTrack; | |
fda59e58 | 272 | } |
683cb6c5 | 273 | minChi2MatchTrigger = chi2; |
274 | chi2MatchTrigger = chi2; | |
275 | loTrgNum = triggerTrack->GetLoTrgNum(); | |
276 | matchedTriggerTrack = triggerTrack; | |
277 | AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum); | |
278 | matchTrigger = 1; | |
279 | if(locTrg->LoLpt()>0) matchTrigger = 2; | |
280 | if(locTrg->LoHpt()>0) matchTrigger = 3; | |
281 | } | |
282 | else if(isDoubleTrack) | |
283 | { | |
284 | doubleMatch = triggerTrack->GetLoTrgNum(); | |
285 | doubleChi2 = chi2; | |
7ec3b9cf | 286 | } |
7771752e | 287 | } |
683cb6c5 | 288 | } |
289 | if(doubleMatch>=0) | |
290 | { // If two trigger tracks match, select the one passing more trigger cuts | |
291 | AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch)); | |
292 | AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch); | |
293 | if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3)) | |
294 | { | |
295 | if(locTrg1->LoHpt()>0) matchTrigger=3; | |
296 | else matchTrigger = 2; | |
297 | loTrgNum = doubleMatch; | |
298 | chi2MatchTrigger = doubleChi2; | |
299 | matchedTriggerTrack = doubleTriggerTrack; | |
300 | } | |
301 | } | |
302 | ||
303 | track->SetMatchTrigger(matchTrigger); | |
304 | track->SetLoTrgNum(loTrgNum); | |
305 | track->SetChi2MatchTrigger(chi2MatchTrigger); | |
306 | ||
307 | AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum)); | |
308 | ||
309 | if (locTrg) | |
310 | { | |
d72d7b9e | 311 | Int_t deviation = locTrg->GetDeviation(); |
683cb6c5 | 312 | track->SetLocalTrigger(locTrg->LoCircuit(), |
313 | locTrg->LoStripX(), | |
314 | locTrg->LoStripY(), | |
c79ae710 | 315 | deviation, |
683cb6c5 | 316 | locTrg->LoLpt(), |
317 | locTrg->LoHpt()); | |
318 | } | |
319 | ||
320 | return matchedTriggerTrack; | |
321 | } | |
322 | ||
323 | ||
324 | //______________________________________________________________________________ | |
325 | UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam, | |
326 | AliMUONTriggerTrack* matchedTriggerTrack, | |
327 | AliMUONVDigitStore& digitStore) const | |
328 | { | |
329 | // | |
330 | /// Get hit pattern on trigger chambers for the current track | |
331 | // | |
332 | UShort_t pattern = 0; | |
333 | Bool_t isMatch[2]; | |
334 | const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh(); | |
335 | ||
336 | Bool_t patternFromTrigTrack = kFALSE; | |
337 | ||
338 | ||
339 | // Calculate hit pattern from trigger track | |
340 | if(matchedTriggerTrack){ | |
341 | patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore); | |
342 | } | |
343 | ||
344 | if(patternFromTrigTrack) return pattern; | |
345 | ||
346 | ||
347 | // Calculate hit pattern from tracker track propagation | |
348 | // if hit pattern from trigger track failed | |
349 | ||
350 | for(Int_t ch=0; ch<4; ++ch) | |
351 | { | |
352 | Int_t iChamber = kNTrackingCh+ch; | |
353 | AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(iChamber)); | |
354 | FindPadMatchingTrack(digitStore, trackParam, isMatch, iChamber); | |
355 | for(Int_t cath=0; cath<2; ++cath) | |
356 | { | |
357 | if(isMatch[cath]) SetBit(pattern, cath, ch); | |
358 | } | |
359 | } | |
360 | return pattern; | |
361 | } | |
362 | ||
363 | ||
364 | //______________________________________________________________________________ | |
365 | void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const | |
366 | { | |
367 | // | |
368 | /// Set hits pattern | |
369 | // | |
370 | const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10}, | |
371 | {0x08, 0x04, 0x02, 0x01}}; | |
372 | pattern |= kMask[cathode][chamber]; | |
373 | } | |
374 | ||
375 | ||
376 | //______________________________________________________________________________ | |
377 | void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const | |
378 | { | |
379 | // | |
380 | /// Set info on efficiency calculation | |
381 | // | |
382 | pattern += effType << 8; | |
383 | pattern += slat << 10; | |
384 | } | |
385 | ||
386 | ||
387 | //______________________________________________________________________________ | |
388 | void | |
389 | AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const | |
390 | { | |
391 | // | |
392 | /// Returns uncertainties on extrapolated position. | |
393 | /// Takes into account Branson plane corrections in the iron wall. | |
394 | // | |
395 | ||
396 | const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd(); | |
397 | const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm | |
398 | ||
399 | AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end | |
400 | AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects | |
401 | return; | |
402 | } | |
403 | ||
404 | ||
405 | //______________________________________________________________________________ | |
406 | Bool_t | |
407 | AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore, | |
408 | AliMUONVDigitStore& digitStore) const | |
409 | { | |
410 | // | |
411 | /// make (S)Digit for trigger | |
412 | // | |
413 | ||
414 | digitStore.Clear(); | |
415 | ||
416 | AliMUONLocalTrigger* locTrg; | |
417 | TIter next(triggerStore.CreateLocalIterator()); | |
418 | ||
419 | while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) ) | |
420 | { | |
421 | if (locTrg->IsNull()) continue; | |
422 | ||
423 | TArrayS xyPattern[2]; | |
424 | locTrg->GetXPattern(xyPattern[0]); | |
425 | locTrg->GetYPattern(xyPattern[1]); | |
426 | ||
427 | // do we need this ? (Ch.F.) | |
428 | // for(Int_t cath=0; cath<2; ++cath) | |
429 | // { | |
430 | // for(Int_t ch=0; ch<4; ++ch) | |
431 | // { | |
432 | // if(xyPattern[cath][ch]==0) continue; | |
433 | // } | |
434 | // } | |
435 | ||
436 | Int_t nBoard = locTrg->LoCircuit(); | |
437 | fDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore); | |
438 | } | |
439 | return kTRUE; | |
7771752e | 440 | } |
441 | ||
442 | ||
443 | //______________________________________________________________________________ | |
7ec3b9cf | 444 | void |
445 | AliMUONTrackHitPattern::FindPadMatchingTrack(AliMUONVDigitStore& digitStore, | |
446 | const AliMUONTrackParam& trackParam, | |
fda59e58 | 447 | Bool_t isMatch[2], Int_t iChamber) const |
7771752e | 448 | { |
449 | // | |
683cb6c5 | 450 | /// Given the tracker track position, searches for matching digits. |
7771752e | 451 | // |
452 | ||
453 | Float_t minMatchDist[2]; | |
454 | ||
7ec3b9cf | 455 | for(Int_t cath=0; cath<2; ++cath) |
456 | { | |
457 | isMatch[cath]=kFALSE; | |
683cb6c5 | 458 | minMatchDist[cath]=fkMaxDistance/10.; |
7771752e | 459 | } |
460 | ||
7ec3b9cf | 461 | TIter next(digitStore.CreateIterator()); |
462 | AliMUONVDigit* mDigit; | |
fda59e58 | 463 | |
7ec3b9cf | 464 | while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) ) |
465 | { | |
466 | Int_t currDetElemId = mDigit->DetElemId(); | |
fda59e58 | 467 | Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId); |
468 | if(currCh!=iChamber) continue; | |
7ec3b9cf | 469 | Int_t cathode = mDigit->Cathode(); |
470 | Int_t ix = mDigit->PadX(); | |
471 | Int_t iy = mDigit->PadY(); | |
472 | Float_t xpad, ypad, zpad; | |
473 | const AliMpVSegmentation* seg = AliMpSegmentation::Instance() | |
474 | ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode)); | |
475 | ||
476 | AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE); | |
477 | Float_t xlocal1 = pad.Position().X(); | |
478 | Float_t ylocal1 = pad.Position().Y(); | |
479 | Float_t dpx = pad.Dimensions().X(); | |
480 | Float_t dpy = pad.Dimensions().Y(); | |
481 | fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad); | |
482 | Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam); | |
483 | if(matchDist>minMatchDist[cathode])continue; | |
484 | isMatch[cathode] = kTRUE; | |
fda59e58 | 485 | if(isMatch[0] && isMatch[1]) break; |
7ec3b9cf | 486 | minMatchDist[cathode] = matchDist; |
7771752e | 487 | } |
7771752e | 488 | } |
489 | ||
490 | ||
491 | //______________________________________________________________________________ | |
7ec3b9cf | 492 | Float_t |
493 | AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad, | |
494 | Float_t dpx, Float_t dpy, | |
495 | const AliMUONTrackParam& trackParam) const | |
7771752e | 496 | { |
497 | // | |
683cb6c5 | 498 | /// Decides if the digit belongs to the tracker track. |
7771752e | 499 | // |
7771752e | 500 | |
fda59e58 | 501 | AliMUONTrackParam trackParamAtPadZ(trackParam); |
502 | AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad); | |
503 | ||
504 | Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor(); | |
505 | Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor(); | |
7771752e | 506 | |
fda59e58 | 507 | const Float_t kNSigma = AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTrigger(); |
508 | ||
509 | const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances(); | |
510 | ||
511 | Float_t sigmaX = TMath::Sqrt(kCovParam(0,0)); | |
512 | Float_t sigmaY = TMath::Sqrt(kCovParam(2,2)); | |
513 | ||
514 | Float_t maxDistX = kNSigma * sigmaX; // in cm | |
515 | Float_t maxDistY = kNSigma * sigmaY; // in cm | |
7771752e | 516 | |
517 | Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx; | |
518 | Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy; | |
519 | ||
683cb6c5 | 520 | Float_t matchDist = fkMaxDistance; |
7771752e | 521 | if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY); |
fda59e58 | 522 | |
7771752e | 523 | return matchDist; |
524 | } | |
525 | ||
526 | ||
683cb6c5 | 527 | //_____________________________________________________________________________ |
528 | Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(AliMUONVDigitStore& digitStore, Int_t &detElemId, | |
529 | Float_t coor[2], Bool_t isMatch[2], | |
530 | TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const | |
531 | { | |
532 | // | |
533 | /// Check slat and board number of digit matching trigger track | |
534 | // | |
535 | ||
536 | enum {kBending, kNonBending}; | |
537 | ||
538 | Float_t minMatchDist[fgkNcathodes]; | |
539 | Int_t padsInCheckArea[fgkNcathodes]; | |
540 | ||
541 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
542 | isMatch[cath] = kFALSE; | |
543 | minMatchDist[cath] = fkMaxDistance/10.; | |
544 | padsInCheckArea[cath] = 0; | |
545 | } | |
546 | Int_t iChamber = AliMpDEManager::GetChamberId(detElemId); | |
547 | Int_t ch = iChamber-10; | |
548 | Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10); | |
549 | Float_t y = coor[1]; | |
550 | Int_t iSlat = detElemId%100; | |
551 | Int_t trigDigitBendPlane = -1; | |
552 | Int_t foundDetElemId = detElemId; | |
553 | Float_t foundZmatch=999.; | |
554 | Float_t yCoorAtPadZ=999.; | |
555 | ||
556 | TIter next(digitStore.CreateIterator()); | |
557 | AliMUONVDigit* mDigit; | |
558 | Int_t idigit=0; | |
559 | ||
560 | while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) ) | |
561 | { | |
562 | idigit++; | |
563 | Int_t currDetElemId = mDigit->DetElemId(); | |
564 | Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId); | |
565 | if(currCh!=iChamber) continue; | |
566 | Int_t currSlat = currDetElemId%100; | |
567 | Int_t slatDiff = TMath::Abs(currSlat-iSlat); | |
568 | if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats | |
569 | Int_t cathode = mDigit->Cathode(); | |
570 | Int_t ix = mDigit->PadX(); | |
571 | Int_t iy = mDigit->PadY(); | |
572 | Float_t xpad, ypad, zpad; | |
573 | const AliMpVSegmentation* seg = AliMpSegmentation::Instance() | |
574 | ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode)); | |
575 | ||
576 | AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE); | |
577 | Float_t xlocal1 = pad.Position().X(); | |
578 | Float_t ylocal1 = pad.Position().Y(); | |
579 | Float_t dpx = pad.Dimensions().X(); | |
580 | Float_t dpy = pad.Dimensions().Y(); | |
581 | fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad); | |
582 | AliDebug(2, Form("DetElemId = %i\tCathode = %i\t(x,y) Pad = (%i,%i) = (%.2f,%.2f)\tDim = (%.2f,%.2f)\tTrack = (%.2f,%.2f)\n",currDetElemId,cathode,ix,iy,xpad,ypad,dpx,dpy,coor[0],coor[1])); | |
583 | // searching track intersection with chambers (second approximation) | |
584 | if(ch%2==1){ | |
585 | //if(iChamber%2==1){ | |
586 | Float_t deltaZ = zpad - zRealMatch[0]; | |
587 | y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11; | |
588 | if(TMath::Abs(y-coor[1])>0.1) AliDebug(3, Form("oldDeltaZ = %7.2f newDeltaZ = %7.2f\toldY = %7.2f new y = %7.2f\n",oldDeltaZ,deltaZ,coor[1],y)); | |
589 | } | |
590 | Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y); | |
591 | if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++; | |
592 | if(matchDist>minMatchDist[cathode])continue; | |
593 | isMatch[cathode] = kTRUE; | |
594 | minMatchDist[cathode] = matchDist; | |
595 | foundDetElemId = currDetElemId; | |
596 | foundZmatch=zpad; | |
597 | yCoorAtPadZ=y; | |
598 | if(cathode==kBending) trigDigitBendPlane = idigit; | |
599 | for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){ | |
600 | AliMpIntPair location = pad.GetLocation(loc); | |
601 | nboard[cathode][loc] = location.GetFirst(); | |
602 | } | |
603 | for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){ | |
604 | nboard[cathode][loc]=-1; | |
605 | } | |
683cb6c5 | 606 | } |
607 | ||
608 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
609 | if(padsInCheckArea[cath]>2) { | |
610 | AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath])); | |
611 | return -500; | |
612 | } | |
613 | } | |
614 | ||
615 | if(isMatch[kBending] || isMatch[kNonBending]){ | |
616 | detElemId = foundDetElemId; | |
617 | zRealMatch[ch] = foundZmatch; | |
618 | coor[1] = yCoorAtPadZ; | |
619 | } | |
620 | return trigDigitBendPlane; | |
621 | } | |
622 | ||
623 | //_____________________________________________________________________________ | |
624 | Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad, | |
625 | Float_t dpx, Float_t dpy, | |
626 | Float_t xTrackAtPad, Float_t yTrackAtPad) const | |
627 | { | |
628 | // | |
629 | /// Decides if the digit belongs to the trigger track. | |
630 | // | |
631 | ||
632 | Float_t maxDist = 2.;//3. // cm | |
633 | Float_t maxDistCheckArea = 6.; // cm | |
634 | ||
635 | Float_t matchDist = fkMaxDistance; | |
636 | ||
637 | Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx; | |
638 | Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy; | |
639 | Float_t maxDistX = maxDist; | |
640 | Float_t maxDistY = maxDist; | |
641 | ||
642 | if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY); | |
643 | else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.; | |
644 | return matchDist; | |
645 | } | |
646 | ||
647 | ||
648 | //_____________________________________________________________________________ | |
649 | Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y, | |
650 | Int_t chamber, Int_t cathode) const | |
651 | { | |
652 | // | |
653 | /// Given the (x,y) position in the chamber, | |
654 | /// it returns the corresponding slat | |
655 | // | |
656 | ||
657 | Int_t resultingDetElemId = -1; | |
658 | AliMpDEIterator it; | |
659 | Float_t minDist = 999.; | |
660 | for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){ | |
661 | Int_t detElemId = it.CurrentDEId(); | |
662 | Int_t ich = detElemId/100-10; | |
663 | Float_t tolerance=0.2*((Float_t)ich); | |
664 | Float_t currDist=9999.; | |
665 | ||
666 | const AliMpVSegmentation* seg = | |
667 | AliMpSegmentation::Instance() | |
668 | ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode)); | |
669 | if (!seg) continue; | |
670 | ||
671 | Float_t deltax = seg->Dimensions().X(); | |
672 | Float_t deltay = seg->Dimensions().Y(); | |
673 | Float_t xlocal1 = -deltax; | |
674 | Float_t ylocal1 = -deltay; | |
675 | Float_t xlocal2 = +deltax; | |
676 | Float_t ylocal2 = +deltay; | |
677 | Float_t xg01, yg01, zg1, xg02, yg02, zg2; | |
678 | fTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1); | |
679 | fTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2); | |
680 | ||
681 | Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02; | |
682 | ||
683 | if(xg01>xg02){ | |
684 | xg1 = xg02; | |
685 | xg2 = xg01; | |
686 | } | |
687 | if(yg01>yg02){ | |
688 | yg1 = yg02; | |
689 | yg2 = yg01; | |
690 | } | |
691 | ||
692 | if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation | |
693 | if(y<yg1) currDist = yg1-y; | |
694 | else if(y>yg2) currDist = y-yg2; | |
695 | if(currDist<minDist) { | |
696 | resultingDetElemId = detElemId; | |
697 | minDist=currDist; | |
698 | continue; | |
699 | } | |
700 | resultingDetElemId = detElemId; | |
701 | break; | |
702 | } | |
703 | } // loop on detElemId | |
704 | return resultingDetElemId; | |
705 | } | |
706 | ||
707 | ||
708 | //_____________________________________________________________________________ | |
709 | void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y, | |
710 | Int_t detElemId, Int_t cathode, | |
711 | Int_t localBoard[4]) const | |
712 | { | |
713 | // | |
714 | /// Given the (x,y) position in the chamber, | |
715 | /// it returns the corresponding local board | |
716 | // | |
717 | ||
718 | for(Int_t loc=0; loc<fgkNlocations; loc++){ | |
719 | localBoard[loc]=-1; | |
720 | } | |
721 | Float_t xl, yl, zl; | |
722 | fTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl); | |
723 | TVector2 pos(xl,yl); | |
724 | const AliMpVSegmentation* seg = | |
725 | AliMpSegmentation::Instance() | |
726 | ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode)); | |
727 | if (seg){ | |
728 | AliMpPad pad = seg->PadByPosition(pos,kFALSE); | |
729 | for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){ | |
730 | AliMpIntPair location = pad.GetLocation(loc); | |
731 | localBoard[loc] = location.GetFirst(); | |
732 | } | |
733 | } | |
734 | } | |
735 | ||
736 | ||
737 | //_____________________________________________________________________________ | |
738 | Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern, | |
739 | AliMUONTriggerTrack *matchedTrigTrack, | |
740 | AliMUONVDigitStore& digitStore) const | |
7771752e | 741 | { |
fda59e58 | 742 | // |
683cb6c5 | 743 | /// It searches for matching digits around the trigger track. |
fda59e58 | 744 | // |
7771752e | 745 | |
683cb6c5 | 746 | enum {kBending, kNonBending}; |
7771752e | 747 | |
683cb6c5 | 748 | Int_t chOrder[fgkNchambers] = {0,2,1,3}; |
749 | ||
750 | TArrayF zRealMatch(fgkNchambers); | |
751 | TArrayF correctFactor(fgkNcathodes); | |
752 | ||
753 | Bool_t isMatch[fgkNcathodes]; | |
754 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
755 | isMatch[cath] = kFALSE; | |
756 | } | |
757 | ||
758 | TArrayF zMeanChamber(fgkNchambers); | |
759 | for(Int_t ch=0; ch<fgkNchambers; ch++){ | |
760 | zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch); | |
761 | } | |
762 | ||
763 | TArrayI digitPerTrack(fgkNcathodes); | |
764 | ||
765 | Float_t trackIntersectCh[fgkNchambers][fgkNcathodes]; | |
766 | ||
767 | TArrayI triggeredDigits; | |
768 | triggeredDigits.Set(fgkNchambers); | |
769 | triggeredDigits.Reset(-1); | |
770 | ||
771 | TArrayI trigScheme[fgkNcathodes]; | |
772 | TArrayI slatThatTriggered[fgkNcathodes]; | |
773 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
774 | trigScheme[cath].Set(fgkNchambers); | |
775 | slatThatTriggered[cath].Set(fgkNchambers); | |
776 | } | |
777 | ||
778 | Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations]; | |
779 | TArrayI nboard[fgkNcathodes]; | |
780 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
781 | nboard[cath].Set(fgkNlocations); | |
782 | } | |
783 | Int_t ineffBoard[fgkNlocations]; | |
784 | for(Int_t loc=0; loc<fgkNlocations; loc++){ | |
785 | ineffBoard[loc] = -1; | |
786 | } | |
787 | ||
788 | digitPerTrack.Reset(); | |
789 | for(Int_t ch=0; ch<fgkNchambers; ch++){ | |
790 | zRealMatch[ch] = zMeanChamber[ch]; | |
791 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
792 | for(Int_t loc=0; loc<fgkNlocations; loc++){ | |
793 | boardThatTriggered[ch][cath][loc]=-1; | |
794 | } | |
795 | } | |
796 | } | |
797 | ||
798 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
799 | slatThatTriggered[cath].Reset(-1); | |
800 | trigScheme[cath].Reset(); | |
801 | } | |
802 | ||
803 | Bool_t isClearEvent = kTRUE; | |
804 | ||
805 | //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane) | |
806 | Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane) | |
807 | Float_t thetaX = matchedTrigTrack->GetThetax(); | |
808 | Float_t thetaY = matchedTrigTrack->GetThetay(); | |
809 | ||
810 | for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop | |
811 | Int_t currCh = chOrder[ch]; | |
812 | AliDebug(2, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0])); | |
813 | ||
814 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
815 | correctFactor[cath]=1.; | |
816 | } | |
817 | // calculate corrections to trigger track theta | |
818 | if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position | |
819 | if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position | |
820 | ||
821 | // searching track intersection with chambers (first approximation) | |
822 | Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0]; | |
823 | trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane) | |
824 | trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane) | |
825 | Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0); | |
826 | if(detElemIdFromTrack<0) { | |
827 | AliDebug(1, "Warning: trigger track outside trigger chamber\n"); | |
828 | continue; | |
829 | } | |
830 | ||
831 | triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11); | |
832 | ||
833 | // if FindPadMatchingTrig = -500 => too many digits matching pad => | |
834 | // => Event not clear => Reject track | |
835 | if(triggeredDigits[currCh]<-100){ | |
836 | isClearEvent = kFALSE; | |
837 | AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack)); | |
838 | break; | |
839 | } | |
840 | ||
841 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
842 | if(!isMatch[cath]) continue; | |
843 | SetBit(pattern, cath, currCh); | |
844 | digitPerTrack[cath]++; | |
845 | trigScheme[cath][currCh]++; | |
846 | slatThatTriggered[cath][currCh] = detElemIdFromTrack; | |
847 | for(Int_t loc=0; loc<fgkNlocations; loc++){ | |
848 | boardThatTriggered[currCh][cath][loc] = nboard[cath][loc]; | |
849 | } | |
850 | } | |
851 | } // end chamber loop | |
852 | ||
853 | for(Int_t cath=0; cath<fgkNcathodes; cath++){ | |
854 | if(digitPerTrack[cath]<3) isClearEvent = kFALSE; | |
855 | if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath)); | |
856 | } | |
857 | ||
858 | if(!isClearEvent) return kFALSE; | |
859 | ||
860 | Int_t goodForEff = kBoardEff; | |
861 | ||
862 | Int_t ineffSlat = -1; | |
863 | Int_t ineffDetElId = -1; | |
864 | Int_t firstSlat = slatThatTriggered[kBending][0]%100; | |
865 | if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100; | |
866 | Int_t firstBoard = boardThatTriggered[0][kBending][0]; | |
867 | if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0]; | |
868 | for(Int_t ch=0; ch<fgkNchambers; ch++){ | |
869 | Bool_t isCurrChIneff = kFALSE; | |
870 | Int_t currSlat = slatThatTriggered[kBending][ch]%100; | |
871 | if(currSlat<0){ | |
872 | ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending); | |
873 | currSlat = ineffDetElId%100; | |
874 | ineffSlat = currSlat; | |
875 | isCurrChIneff = kTRUE; | |
876 | } | |
877 | if(currSlat!=firstSlat) { | |
878 | AddEffInfo(pattern, 20, kChEff); | |
879 | return kTRUE; | |
880 | } | |
881 | Bool_t atLeastOneLoc=kFALSE; | |
882 | if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard); | |
883 | for(Int_t loc=0; loc<fgkNlocations; loc++){ | |
884 | Int_t currBoard = boardThatTriggered[ch][kBending][loc]; | |
885 | if(isCurrChIneff) currBoard = ineffBoard[loc]; | |
886 | if(currBoard==firstBoard){ | |
887 | atLeastOneLoc=kTRUE; | |
888 | break; | |
889 | } | |
890 | } | |
891 | if(!atLeastOneLoc) goodForEff = kSlatEff; | |
892 | } // end chamber loop | |
893 | ||
894 | AddEffInfo(pattern, firstSlat, goodForEff); | |
895 | return kTRUE; | |
7771752e | 896 | } |