1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
19 //-----------------------------------------------------------------------------
20 /// \class AliMUONTrackHitPattern
22 /// This class propagates tracks to trigger chambers
23 /// searching for matching trigger tracks and fired strips.
25 /// To each track, a hit pattern for trigger chambers is set.
26 /// The hit pattern is a UShort_t with 8 bits used:
30 /// ----------- ------------
31 /// chamber: 11 12 13 14 | 11 12 13 14
32 /// cathode: bending | non-bending
34 /// The main method is:
35 /// * ExecuteValidation
37 /// \author Diego Stocco
38 //-----------------------------------------------------------------------------
41 #include "AliMUONTrackHitPattern.h"
43 #include "AliMUONConstants.h"
44 #include "AliMUONVDigit.h"
45 #include "AliMUONDigitMaker.h"
46 #include "AliMUONDigitStoreV1.h"
47 #include "AliMUONGeometryTransformer.h"
48 #include "AliMUONLocalTrigger.h"
49 #include "AliMUONLocalTriggerBoard.h"
50 #include "AliMUONRecoParam.h"
51 #include "AliMUONTrack.h"
52 #include "AliMUONTrackExtrap.h"
53 #include "AliMUONTrackParam.h"
54 #include "AliMUONVTrackStore.h"
55 #include "AliMUONVTriggerStore.h"
57 #include "AliMpSegmentation.h"
58 #include "AliMpVSegmentation.h"
59 #include "AliMpDEManager.h"
60 #include "AliMUONReconstructor.h"
61 #include "AliMUONTriggerTrack.h"
62 #include "AliMUONVTriggerTrackStore.h"
64 #include "AliMpConstants.h"
67 #include "AliTracker.h"
69 #include <Riostream.h>
71 #include <TClonesArray.h>
75 #include <TDirectory.h>
82 ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
86 //______________________________________________________________________________
87 AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
88 const AliMUONGeometryTransformer& transformer,
89 const AliMUONDigitMaker& digitMaker)
91 fkRecoParam(recoParam),
92 fkTransformer(transformer),
93 fkDigitMaker(digitMaker),
98 /// Default constructor
100 AliMUONTrackExtrap::SetField();
104 //______________________________________________________________________________
105 AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
108 delete fTrigCovariance;
112 //______________________________________________________________________________
113 void AliMUONTrackHitPattern::InitMembers()
116 /// Initialize data members
118 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
120 const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso();
121 const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso();
122 const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ;
123 const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ;
125 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
126 fTrigCovariance = new TMatrixD(3,3);
127 fTrigCovariance->Zero();
128 (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso;
129 (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso;
130 (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso;
131 (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend;
135 //_____________________________________________________________________________
136 void AliMUONTrackHitPattern::CheckConstants() const
138 /// Check consistence of redefined constants
140 assert(fgkNcathodes == AliMpConstants::NofCathodes());
141 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
142 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
146 //______________________________________________________________________________
147 void AliMUONTrackHitPattern::ExecuteValidation(const AliMUONVTrackStore& trackStore,
148 const AliMUONVTriggerTrackStore& triggerTrackStore,
149 const AliMUONVTriggerStore& triggerStore) const
153 /// Loops on reco tracks, extrapolates them to trigger chambers
154 /// and searches for matching trigger tracks and digits
157 AliMUONDigitStoreV1 digitStore;
158 fkDigitMaker.TriggerToDigitsStore(triggerStore,digitStore);
161 TIter itTrack(trackStore.CreateIterator());
164 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
166 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
168 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
170 ApplyMCSCorrections(trackParam);
171 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
173 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
175 UShort_t pattern = GetHitPattern(matchedTriggerTrack, digitStore, &trackParam);
176 track->SetHitsPatternInTrigCh(pattern);
181 //______________________________________________________________________________
182 AliMUONTriggerTrack *
183 AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
184 AliMUONTrackParam& trackParam,
185 const AliMUONVTriggerTrackStore& triggerTrackStore,
186 const AliMUONVTriggerStore& triggerStore) const
189 /// Match track with trigger track
192 Int_t matchTrigger = 0;
194 Double_t distTriggerTrack[3], sigma2[3];
196 Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
197 Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
198 Double_t doubleChi2 = -1.;
199 AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
200 AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
202 const TMatrixD& kParamCov = trackParam.GetCovariances();
204 Double_t xTrack = trackParam.GetNonBendingCoor();
205 Double_t yTrack = trackParam.GetBendingCoor();
206 Double_t ySlopeTrack = trackParam.GetBendingSlope();
208 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
209 TMatrixD trackCov(3,3);
211 trackCov(0,0) = kParamCov(0,0);
212 trackCov(1,1) = kParamCov(2,2);
213 trackCov(2,2) = kParamCov(3,3);
214 trackCov(1,2) = kParamCov(2,3);
215 trackCov(2,1) = kParamCov(3,2);
217 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
219 Bool_t isCovOK = kTRUE;
221 if (sumCov.Determinant() != 0) {
224 AliWarning(" Determinant = 0");
226 sigma2[0] = kParamCov(0,0);
227 sigma2[1] = kParamCov(2,2);
228 sigma2[2] = kParamCov(3,3);
229 // sigma of distributions (trigger-track) X,Y,slopeY
230 const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(),
231 AliMUONConstants::TriggerBendingReso(),
232 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ};
233 for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar];
236 AliMUONTriggerTrack *triggerTrack;
237 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
238 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
240 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
241 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
242 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
245 TMatrixD paramDiff(3,1);
246 for(Int_t iVar = 0; iVar < 3; iVar++)
247 paramDiff(iVar,0) = distTriggerTrack[iVar];
249 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
250 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
255 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
258 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
259 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
261 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
262 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
266 doubleMatch = loTrgNum;
267 doubleChi2 = chi2MatchTrigger;
268 doubleTriggerTrack = matchedTriggerTrack;
270 minChi2MatchTrigger = chi2;
271 chi2MatchTrigger = chi2;
272 loTrgNum = triggerTrack->GetLoTrgNum();
273 matchedTriggerTrack = triggerTrack;
274 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
276 if(locTrg->LoLpt()>0) matchTrigger = 2;
277 if(locTrg->LoHpt()>0) matchTrigger = 3;
279 else if(isDoubleTrack)
281 doubleMatch = triggerTrack->GetLoTrgNum();
287 { // If two trigger tracks match, select the one passing more trigger cuts
288 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
289 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
290 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
292 if(locTrg1->LoHpt()>0) matchTrigger=3;
293 else matchTrigger = 2;
294 loTrgNum = doubleMatch;
295 chi2MatchTrigger = doubleChi2;
296 matchedTriggerTrack = doubleTriggerTrack;
300 track->SetMatchTrigger(matchTrigger);
301 track->SetLoTrgNum(loTrgNum);
302 track->SetChi2MatchTrigger(chi2MatchTrigger);
304 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
308 Int_t deviation = locTrg->GetDeviation();
309 track->SetLocalTrigger(locTrg->LoCircuit(),
317 return matchedTriggerTrack;
321 //______________________________________________________________________________
322 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTriggerTrack* matchedTriggerTrack,
323 AliMUONVDigitStore& digitStore,
324 AliMUONTrackParam* trackParam) const
327 /// Get hit pattern on trigger chambers for the current track
329 UShort_t pattern = 0;
331 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
333 Bool_t patternFromTrigTrack = kFALSE;
336 // Calculate hit pattern from trigger track
337 if(matchedTriggerTrack){
338 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
341 if(patternFromTrigTrack) return pattern;
344 // Calculate hit pattern from tracker track propagation
345 // if hit pattern from trigger track failed and track parameters are provided
347 if(!trackParam) return 0;
349 for(Int_t ch=0; ch<4; ++ch)
351 Int_t iChamber = kNTrackingCh+ch;
352 AliMUONTrackExtrap::ExtrapToZCov(trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
353 FindPadMatchingTrack(digitStore, *trackParam, isMatch, iChamber);
354 for(Int_t cath=0; cath<2; ++cath)
356 if(isMatch[cath]) SetBit(pattern, cath, ch);
363 //______________________________________________________________________________
364 void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
369 const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
370 {0x08, 0x04, 0x02, 0x01}};
371 pattern |= kMask[cathode][chamber];
375 //______________________________________________________________________________
376 void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
379 /// Set info on efficiency calculation
381 pattern += effType << 8;
382 pattern += slat << 10;
386 //______________________________________________________________________________
388 AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
391 /// Returns uncertainties on extrapolated position.
392 /// Takes into account Branson plane corrections in the iron wall.
395 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
396 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
398 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
399 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
404 //______________________________________________________________________________
406 AliMUONTrackHitPattern::FindPadMatchingTrack(const AliMUONVDigitStore& digitStore,
407 const AliMUONTrackParam& trackParam,
408 Bool_t isMatch[2], Int_t iChamber) const
411 /// Given the tracker track position, searches for matching digits.
414 Float_t minMatchDist[2];
416 for(Int_t cath=0; cath<2; ++cath)
418 isMatch[cath]=kFALSE;
419 minMatchDist[cath]=fkMaxDistance/10.;
422 TIter next(digitStore.CreateIterator());
423 AliMUONVDigit* mDigit;
425 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
427 Int_t currDetElemId = mDigit->DetElemId();
428 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
429 if(currCh!=iChamber) continue;
430 Int_t cathode = mDigit->Cathode();
431 Int_t ix = mDigit->PadX();
432 Int_t iy = mDigit->PadY();
433 Float_t xpad, ypad, zpad;
434 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
435 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
437 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
438 Float_t xlocal1 = pad.Position().X();
439 Float_t ylocal1 = pad.Position().Y();
440 Float_t dpx = pad.Dimensions().X();
441 Float_t dpy = pad.Dimensions().Y();
442 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
443 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
444 if(matchDist>minMatchDist[cathode])continue;
445 isMatch[cathode] = kTRUE;
446 if(isMatch[0] && isMatch[1]) break;
447 minMatchDist[cathode] = matchDist;
452 //______________________________________________________________________________
454 AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
455 Float_t dpx, Float_t dpy,
456 const AliMUONTrackParam& trackParam) const
459 /// Decides if the digit belongs to the tracker track.
462 AliMUONTrackParam trackParamAtPadZ(trackParam);
463 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
465 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
466 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
468 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
470 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
472 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
473 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
475 Float_t maxDistX = kNSigma * sigmaX; // in cm
476 Float_t maxDistY = kNSigma * sigmaY; // in cm
478 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
479 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
481 Float_t matchDist = fkMaxDistance;
482 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
488 //_____________________________________________________________________________
489 Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(const AliMUONVDigitStore& digitStore, Int_t &detElemId,
490 Float_t coor[2], Bool_t isMatch[2],
491 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
494 /// Check slat and board number of digit matching trigger track
497 enum {kBending, kNonBending};
499 Float_t minMatchDist[fgkNcathodes];
500 Int_t padsInCheckArea[fgkNcathodes];
502 for(Int_t cath=0; cath<fgkNcathodes; cath++){
503 isMatch[cath] = kFALSE;
504 minMatchDist[cath] = fkMaxDistance/10.;
505 padsInCheckArea[cath] = 0;
507 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
508 Int_t ch = iChamber-10;
509 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
511 Int_t iSlat = detElemId%100;
512 Int_t trigDigitBendPlane = -1;
513 Int_t foundDetElemId = detElemId;
514 Float_t foundZmatch=999.;
515 Float_t yCoorAtPadZ=999.;
517 TIter next(digitStore.CreateIterator());
518 AliMUONVDigit* mDigit;
521 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
524 Int_t currDetElemId = mDigit->DetElemId();
525 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
526 if(currCh!=iChamber) continue;
527 Int_t currSlat = currDetElemId%100;
528 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
529 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
530 Int_t cathode = mDigit->Cathode();
531 Int_t ix = mDigit->PadX();
532 Int_t iy = mDigit->PadY();
533 Float_t xpad, ypad, zpad;
534 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
535 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
537 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
538 Float_t xlocal1 = pad.Position().X();
539 Float_t ylocal1 = pad.Position().Y();
540 Float_t dpx = pad.Dimensions().X();
541 Float_t dpy = pad.Dimensions().Y();
542 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
543 AliDebug(2, Form("\nDetElemId = %i Cathode = %i Pad = (%i,%i) = (%.2f,%.2f) Dim = (%.2f,%.2f) Track = (%.2f,%.2f)\n",currDetElemId,cathode,ix,iy,xpad,ypad,dpx,dpy,coor[0],coor[1]));
544 // searching track intersection with chambers (second approximation)
547 Float_t deltaZ = zpad - zRealMatch[0];
548 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
549 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));
551 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
552 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
553 if(matchDist>minMatchDist[cathode])continue;
554 isMatch[cathode] = kTRUE;
555 minMatchDist[cathode] = matchDist;
556 foundDetElemId = currDetElemId;
559 if(cathode==kBending) trigDigitBendPlane = idigit;
560 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
561 nboard[cathode][loc] = pad.GetLocalBoardId(loc);
563 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
564 nboard[cathode][loc]=-1;
568 for(Int_t cath=0; cath<fgkNcathodes; cath++){
569 if(padsInCheckArea[cath]>2) {
570 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
575 if(isMatch[kBending] || isMatch[kNonBending]){
576 detElemId = foundDetElemId;
577 zRealMatch[ch] = foundZmatch;
578 coor[1] = yCoorAtPadZ;
580 return trigDigitBendPlane;
583 //_____________________________________________________________________________
584 Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
585 Float_t dpx, Float_t dpy,
586 Float_t xTrackAtPad, Float_t yTrackAtPad) const
589 /// Decides if the digit belongs to the trigger track.
592 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
593 if(maxDist<2.) maxDist = 2.;
594 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
596 Float_t matchDist = fkMaxDistance;
598 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
599 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
600 Float_t maxDistX = maxDist;
601 Float_t maxDistY = maxDist;
603 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
604 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
609 //_____________________________________________________________________________
610 Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
611 Int_t chamber, Int_t cathode) const
614 /// Given the (x,y) position in the chamber,
615 /// it returns the corresponding slat
618 Int_t resultingDetElemId = -1;
620 Float_t minDist = 999.;
621 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
622 Int_t detElemId = it.CurrentDEId();
623 Int_t ich = detElemId/100-10;
624 Float_t tolerance=0.2*((Float_t)ich);
625 Float_t currDist=9999.;
627 const AliMpVSegmentation* seg =
628 AliMpSegmentation::Instance()
629 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
632 Float_t deltax = seg->Dimensions().X();
633 Float_t deltay = seg->Dimensions().Y();
634 Float_t xlocal1 = -deltax;
635 Float_t ylocal1 = -deltay;
636 Float_t xlocal2 = +deltax;
637 Float_t ylocal2 = +deltay;
638 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
639 fkTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
640 fkTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
642 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
653 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
654 if(y<yg1) currDist = yg1-y;
655 else if(y>yg2) currDist = y-yg2;
656 if(currDist<minDist) {
657 resultingDetElemId = detElemId;
661 resultingDetElemId = detElemId;
664 } // loop on detElemId
665 return resultingDetElemId;
669 //_____________________________________________________________________________
670 void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
671 Int_t detElemId, Int_t cathode,
672 Int_t localBoard[4]) const
675 /// Given the (x,y) position in the chamber,
676 /// it returns the corresponding local board
679 for(Int_t loc=0; loc<fgkNlocations; loc++){
683 fkTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
685 const AliMpVSegmentation* seg =
686 AliMpSegmentation::Instance()
687 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
689 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
690 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
691 localBoard[loc] = pad.GetLocalBoardId(loc);
697 //_____________________________________________________________________________
698 Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
699 const AliMUONTriggerTrack* matchedTrigTrack,
700 AliMUONVDigitStore& digitStore) const
703 /// It searches for matching digits around the trigger track.
706 enum {kBending, kNonBending};
708 Int_t chOrder[fgkNchambers] = {0,2,1,3};
710 TArrayF zRealMatch(fgkNchambers);
711 TArrayF correctFactor(fgkNcathodes);
713 Bool_t isMatch[fgkNcathodes];
714 for(Int_t cath=0; cath<fgkNcathodes; cath++){
715 isMatch[cath] = kFALSE;
718 TArrayF zMeanChamber(fgkNchambers);
719 for(Int_t ch=0; ch<fgkNchambers; ch++){
720 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
723 TArrayI digitPerTrack(fgkNcathodes);
725 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
727 TArrayI triggeredDigits;
728 triggeredDigits.Set(fgkNchambers);
729 triggeredDigits.Reset(-1);
731 TArrayI trigScheme[fgkNcathodes];
732 TArrayI slatThatTriggered[fgkNcathodes];
733 for(Int_t cath=0; cath<fgkNcathodes; cath++){
734 trigScheme[cath].Set(fgkNchambers);
735 slatThatTriggered[cath].Set(fgkNchambers);
738 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
739 TArrayI nboard[fgkNcathodes];
740 for(Int_t cath=0; cath<fgkNcathodes; cath++){
741 nboard[cath].Set(fgkNlocations);
743 Int_t ineffBoard[fgkNlocations];
744 for(Int_t loc=0; loc<fgkNlocations; loc++){
745 ineffBoard[loc] = -1;
748 digitPerTrack.Reset();
749 for(Int_t ch=0; ch<fgkNchambers; ch++){
750 zRealMatch[ch] = zMeanChamber[ch];
751 for(Int_t cath=0; cath<fgkNcathodes; cath++){
752 for(Int_t loc=0; loc<fgkNlocations; loc++){
753 boardThatTriggered[ch][cath][loc]=-1;
758 for(Int_t cath=0; cath<fgkNcathodes; cath++){
759 slatThatTriggered[cath].Reset(-1);
760 trigScheme[cath].Reset();
763 Bool_t isClearEvent = kTRUE;
765 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
766 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
767 Float_t thetaX = matchedTrigTrack->GetThetax();
768 Float_t thetaY = matchedTrigTrack->GetThetay();
770 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
771 Int_t currCh = chOrder[ch];
772 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
774 for(Int_t cath=0; cath<fgkNcathodes; cath++){
775 correctFactor[cath]=1.;
777 // calculate corrections to trigger track theta
778 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
779 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
781 // searching track intersection with chambers (first approximation)
782 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
783 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
784 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
785 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
786 if(detElemIdFromTrack<0) {
787 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
791 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
793 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
794 // => Event not clear => Reject track
795 if(triggeredDigits[currCh]<-100){
796 isClearEvent = kFALSE;
797 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
801 for(Int_t cath=0; cath<fgkNcathodes; cath++){
802 if(!isMatch[cath]) continue;
803 SetBit(pattern, cath, currCh);
804 digitPerTrack[cath]++;
805 trigScheme[cath][currCh]++;
806 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
807 for(Int_t loc=0; loc<fgkNlocations; loc++){
808 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
811 } // end chamber loop
813 for(Int_t cath=0; cath<fgkNcathodes; cath++){
814 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
815 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
818 if(!isClearEvent) return kFALSE;
820 Int_t goodForEff = kBoardEff;
822 Int_t ineffSlat = -1;
823 Int_t ineffDetElId = -1;
824 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
825 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
826 Int_t firstBoard = boardThatTriggered[0][kBending][0];
827 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
828 for(Int_t ch=0; ch<fgkNchambers; ch++){
829 Bool_t isCurrChIneff = kFALSE;
830 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
832 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
833 currSlat = ineffDetElId%100;
834 ineffSlat = currSlat;
835 isCurrChIneff = kTRUE;
837 if(currSlat!=firstSlat) {
838 AddEffInfo(pattern, 20, kChEff);
841 Bool_t atLeastOneLoc=kFALSE;
842 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
843 for(Int_t loc=0; loc<fgkNlocations; loc++){
844 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
845 if(isCurrChIneff) currBoard = ineffBoard[loc];
846 if(currBoard==firstBoard){
851 if(!atLeastOneLoc) goodForEff = kSlatEff;
852 } // end chamber loop
854 AddEffInfo(pattern, firstSlat, goodForEff);