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 "AliMUONTrack.h"
51 #include "AliMUONTrackExtrap.h"
52 #include "AliMUONTrackParam.h"
53 #include "AliMUONVTrackStore.h"
54 #include "AliMUONVTriggerStore.h"
56 #include "AliMpSegmentation.h"
57 #include "AliMpVSegmentation.h"
58 #include "AliMpDEManager.h"
59 #include "AliMUONReconstructor.h"
60 #include "AliMUONRecoParam.h"
61 #include "AliMUONTriggerTrack.h"
62 #include "AliMUONVTriggerTrackStore.h"
64 #include "AliMpConstants.h"
68 #include "AliTracker.h"
70 #include <Riostream.h>
72 #include <TClonesArray.h>
76 #include <TDirectory.h>
83 ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
87 //______________________________________________________________________________
88 AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONGeometryTransformer& transformer,
89 const AliMUONDigitMaker& digitMaker)
91 fTransformer(transformer),
92 fDigitMaker(digitMaker),
97 /// Default constructor
100 // Set magnetic field
101 const AliMagF* kField = AliTracker::GetFieldMap();
102 if (!kField) AliFatal("No field available");
103 AliMUONTrackExtrap::SetField(kField);
107 //______________________________________________________________________________
108 AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
111 delete fTrigCovariance;
115 //______________________________________________________________________________
116 void AliMUONTrackHitPattern::InitMembers()
119 /// Initialize data members
121 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
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;
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;
138 //_____________________________________________________________________________
139 void AliMUONTrackHitPattern::CheckConstants() const
141 /// Check consistence of redefined constants
143 assert(fgkNcathodes == AliMpConstants::NofCathodes());
144 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
145 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
149 //______________________________________________________________________________
150 void AliMUONTrackHitPattern::ExecuteValidation(AliMUONVTrackStore& trackStore,
151 const AliMUONVTriggerTrackStore& triggerTrackStore,
152 const AliMUONVTriggerStore& triggerStore) const
156 /// Loops on reco tracks, extrapolates them to trigger chambers
157 /// and searches for matching trigger tracks and digits
160 AliMUONDigitStoreV1 digitStore;
161 TriggerDigits(triggerStore,digitStore);
164 TIter itTrack(trackStore.CreateIterator());
167 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
169 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
171 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
173 ApplyMCSCorrections(trackParam);
174 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
176 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
178 UShort_t pattern = GetHitPattern(trackParam, matchedTriggerTrack, digitStore);
179 track->SetHitsPatternInTrigCh(pattern);
184 //______________________________________________________________________________
185 AliMUONTriggerTrack *
186 AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
187 AliMUONTrackParam& trackParam,
188 const AliMUONVTriggerTrackStore& triggerTrackStore,
189 const AliMUONVTriggerStore& triggerStore) const
192 /// Match track with trigger track
195 Int_t matchTrigger = 0;
197 Double_t distTriggerTrack[3], sigma2[3];
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;
205 const TMatrixD& kParamCov = trackParam.GetCovariances();
207 Double_t xTrack = trackParam.GetNonBendingCoor();
208 Double_t yTrack = trackParam.GetBendingCoor();
209 Double_t ySlopeTrack = trackParam.GetBendingSlope();
211 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
212 TMatrixD trackCov(3,3);
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);
220 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
222 Bool_t isCovOK = kTRUE;
224 if (sumCov.Determinant() != 0) {
227 AliWarning(" Determinant = 0");
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];
239 AliMUONTriggerTrack *triggerTrack;
240 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
241 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
243 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
244 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
245 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
248 TMatrixD paramDiff(3,1);
249 for(Int_t iVar = 0; iVar < 3; iVar++)
250 paramDiff(iVar,0) = distTriggerTrack[iVar];
252 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
253 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
258 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
261 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
262 if (chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
264 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
265 if (chi2 < minChi2MatchTrigger && chi2 < AliMUONReconstructor::GetRecoParam()->GetMaxNormChi2MatchTrigger())
269 doubleMatch = loTrgNum;
270 doubleChi2 = chi2MatchTrigger;
271 doubleTriggerTrack = matchedTriggerTrack;
273 minChi2MatchTrigger = chi2;
274 chi2MatchTrigger = chi2;
275 loTrgNum = triggerTrack->GetLoTrgNum();
276 matchedTriggerTrack = triggerTrack;
277 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
279 if(locTrg->LoLpt()>0) matchTrigger = 2;
280 if(locTrg->LoHpt()>0) matchTrigger = 3;
282 else if(isDoubleTrack)
284 doubleMatch = triggerTrack->GetLoTrgNum();
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))
295 if(locTrg1->LoHpt()>0) matchTrigger=3;
296 else matchTrigger = 2;
297 loTrgNum = doubleMatch;
298 chi2MatchTrigger = doubleChi2;
299 matchedTriggerTrack = doubleTriggerTrack;
303 track->SetMatchTrigger(matchTrigger);
304 track->SetLoTrgNum(loTrgNum);
305 track->SetChi2MatchTrigger(chi2MatchTrigger);
307 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
311 Int_t deviation = locTrg->GetDeviation();
312 track->SetLocalTrigger(locTrg->LoCircuit(),
320 return matchedTriggerTrack;
324 //______________________________________________________________________________
325 UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam,
326 AliMUONTriggerTrack* matchedTriggerTrack,
327 AliMUONVDigitStore& digitStore) const
330 /// Get hit pattern on trigger chambers for the current track
332 UShort_t pattern = 0;
334 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
336 Bool_t patternFromTrigTrack = kFALSE;
339 // Calculate hit pattern from trigger track
340 if(matchedTriggerTrack){
341 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
344 if(patternFromTrigTrack) return pattern;
347 // Calculate hit pattern from tracker track propagation
348 // if hit pattern from trigger track failed
350 for(Int_t ch=0; ch<4; ++ch)
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)
357 if(isMatch[cath]) SetBit(pattern, cath, ch);
364 //______________________________________________________________________________
365 void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
370 const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
371 {0x08, 0x04, 0x02, 0x01}};
372 pattern |= kMask[cathode][chamber];
376 //______________________________________________________________________________
377 void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
380 /// Set info on efficiency calculation
382 pattern += effType << 8;
383 pattern += slat << 10;
387 //______________________________________________________________________________
389 AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
392 /// Returns uncertainties on extrapolated position.
393 /// Takes into account Branson plane corrections in the iron wall.
396 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
397 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
399 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
400 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
405 //______________________________________________________________________________
407 AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore,
408 AliMUONVDigitStore& digitStore) const
411 /// make (S)Digit for trigger
416 AliMUONLocalTrigger* locTrg;
417 TIter next(triggerStore.CreateLocalIterator());
419 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
421 if (locTrg->IsNull()) continue;
423 TArrayS xyPattern[2];
424 locTrg->GetXPattern(xyPattern[0]);
425 locTrg->GetYPattern(xyPattern[1]);
427 // do we need this ? (Ch.F.)
428 // for(Int_t cath=0; cath<2; ++cath)
430 // for(Int_t ch=0; ch<4; ++ch)
432 // if(xyPattern[cath][ch]==0) continue;
436 Int_t nBoard = locTrg->LoCircuit();
437 fDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore);
443 //______________________________________________________________________________
445 AliMUONTrackHitPattern::FindPadMatchingTrack(AliMUONVDigitStore& digitStore,
446 const AliMUONTrackParam& trackParam,
447 Bool_t isMatch[2], Int_t iChamber) const
450 /// Given the tracker track position, searches for matching digits.
453 Float_t minMatchDist[2];
455 for(Int_t cath=0; cath<2; ++cath)
457 isMatch[cath]=kFALSE;
458 minMatchDist[cath]=fkMaxDistance/10.;
461 TIter next(digitStore.CreateIterator());
462 AliMUONVDigit* mDigit;
464 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
466 Int_t currDetElemId = mDigit->DetElemId();
467 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
468 if(currCh!=iChamber) continue;
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));
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;
485 if(isMatch[0] && isMatch[1]) break;
486 minMatchDist[cathode] = matchDist;
491 //______________________________________________________________________________
493 AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
494 Float_t dpx, Float_t dpy,
495 const AliMUONTrackParam& trackParam) const
498 /// Decides if the digit belongs to the tracker track.
501 AliMUONTrackParam trackParamAtPadZ(trackParam);
502 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
504 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
505 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
507 const Float_t kNSigma = AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTrigger();
509 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
511 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
512 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
514 Float_t maxDistX = kNSigma * sigmaX; // in cm
515 Float_t maxDistY = kNSigma * sigmaY; // in cm
517 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
518 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
520 Float_t matchDist = fkMaxDistance;
521 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
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
533 /// Check slat and board number of digit matching trigger track
536 enum {kBending, kNonBending};
538 Float_t minMatchDist[fgkNcathodes];
539 Int_t padsInCheckArea[fgkNcathodes];
541 for(Int_t cath=0; cath<fgkNcathodes; cath++){
542 isMatch[cath] = kFALSE;
543 minMatchDist[cath] = fkMaxDistance/10.;
544 padsInCheckArea[cath] = 0;
546 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
547 Int_t ch = iChamber-10;
548 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
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.;
556 TIter next(digitStore.CreateIterator());
557 AliMUONVDigit* mDigit;
560 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
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));
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("\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]));
583 // searching track intersection with chambers (second approximation)
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));
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;
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();
603 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
604 nboard[cathode][loc]=-1;
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]));
615 if(isMatch[kBending] || isMatch[kNonBending]){
616 detElemId = foundDetElemId;
617 zRealMatch[ch] = foundZmatch;
618 coor[1] = yCoorAtPadZ;
620 return trigDigitBendPlane;
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
629 /// Decides if the digit belongs to the trigger track.
632 Float_t maxDist = AliMUONReconstructor::GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
633 if(maxDist<2.) maxDist = 2.;
634 Float_t maxDistCheckArea = AliMUONReconstructor::GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
636 Float_t matchDist = fkMaxDistance;
638 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
639 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
640 Float_t maxDistX = maxDist;
641 Float_t maxDistY = maxDist;
643 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
644 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
649 //_____________________________________________________________________________
650 Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
651 Int_t chamber, Int_t cathode) const
654 /// Given the (x,y) position in the chamber,
655 /// it returns the corresponding slat
658 Int_t resultingDetElemId = -1;
660 Float_t minDist = 999.;
661 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
662 Int_t detElemId = it.CurrentDEId();
663 Int_t ich = detElemId/100-10;
664 Float_t tolerance=0.2*((Float_t)ich);
665 Float_t currDist=9999.;
667 const AliMpVSegmentation* seg =
668 AliMpSegmentation::Instance()
669 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
672 Float_t deltax = seg->Dimensions().X();
673 Float_t deltay = seg->Dimensions().Y();
674 Float_t xlocal1 = -deltax;
675 Float_t ylocal1 = -deltay;
676 Float_t xlocal2 = +deltax;
677 Float_t ylocal2 = +deltay;
678 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
679 fTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
680 fTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
682 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
693 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
694 if(y<yg1) currDist = yg1-y;
695 else if(y>yg2) currDist = y-yg2;
696 if(currDist<minDist) {
697 resultingDetElemId = detElemId;
701 resultingDetElemId = detElemId;
704 } // loop on detElemId
705 return resultingDetElemId;
709 //_____________________________________________________________________________
710 void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
711 Int_t detElemId, Int_t cathode,
712 Int_t localBoard[4]) const
715 /// Given the (x,y) position in the chamber,
716 /// it returns the corresponding local board
719 for(Int_t loc=0; loc<fgkNlocations; loc++){
723 fTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
725 const AliMpVSegmentation* seg =
726 AliMpSegmentation::Instance()
727 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
729 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
730 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
731 AliMpIntPair location = pad.GetLocation(loc);
732 localBoard[loc] = location.GetFirst();
738 //_____________________________________________________________________________
739 Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
740 AliMUONTriggerTrack *matchedTrigTrack,
741 AliMUONVDigitStore& digitStore) const
744 /// It searches for matching digits around the trigger track.
747 enum {kBending, kNonBending};
749 Int_t chOrder[fgkNchambers] = {0,2,1,3};
751 TArrayF zRealMatch(fgkNchambers);
752 TArrayF correctFactor(fgkNcathodes);
754 Bool_t isMatch[fgkNcathodes];
755 for(Int_t cath=0; cath<fgkNcathodes; cath++){
756 isMatch[cath] = kFALSE;
759 TArrayF zMeanChamber(fgkNchambers);
760 for(Int_t ch=0; ch<fgkNchambers; ch++){
761 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
764 TArrayI digitPerTrack(fgkNcathodes);
766 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
768 TArrayI triggeredDigits;
769 triggeredDigits.Set(fgkNchambers);
770 triggeredDigits.Reset(-1);
772 TArrayI trigScheme[fgkNcathodes];
773 TArrayI slatThatTriggered[fgkNcathodes];
774 for(Int_t cath=0; cath<fgkNcathodes; cath++){
775 trigScheme[cath].Set(fgkNchambers);
776 slatThatTriggered[cath].Set(fgkNchambers);
779 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
780 TArrayI nboard[fgkNcathodes];
781 for(Int_t cath=0; cath<fgkNcathodes; cath++){
782 nboard[cath].Set(fgkNlocations);
784 Int_t ineffBoard[fgkNlocations];
785 for(Int_t loc=0; loc<fgkNlocations; loc++){
786 ineffBoard[loc] = -1;
789 digitPerTrack.Reset();
790 for(Int_t ch=0; ch<fgkNchambers; ch++){
791 zRealMatch[ch] = zMeanChamber[ch];
792 for(Int_t cath=0; cath<fgkNcathodes; cath++){
793 for(Int_t loc=0; loc<fgkNlocations; loc++){
794 boardThatTriggered[ch][cath][loc]=-1;
799 for(Int_t cath=0; cath<fgkNcathodes; cath++){
800 slatThatTriggered[cath].Reset(-1);
801 trigScheme[cath].Reset();
804 Bool_t isClearEvent = kTRUE;
806 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
807 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
808 Float_t thetaX = matchedTrigTrack->GetThetax();
809 Float_t thetaY = matchedTrigTrack->GetThetay();
811 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
812 Int_t currCh = chOrder[ch];
813 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
815 for(Int_t cath=0; cath<fgkNcathodes; cath++){
816 correctFactor[cath]=1.;
818 // calculate corrections to trigger track theta
819 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
820 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
822 // searching track intersection with chambers (first approximation)
823 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
824 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
825 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
826 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
827 if(detElemIdFromTrack<0) {
828 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
832 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
834 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
835 // => Event not clear => Reject track
836 if(triggeredDigits[currCh]<-100){
837 isClearEvent = kFALSE;
838 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
842 for(Int_t cath=0; cath<fgkNcathodes; cath++){
843 if(!isMatch[cath]) continue;
844 SetBit(pattern, cath, currCh);
845 digitPerTrack[cath]++;
846 trigScheme[cath][currCh]++;
847 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
848 for(Int_t loc=0; loc<fgkNlocations; loc++){
849 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
852 } // end chamber loop
854 for(Int_t cath=0; cath<fgkNcathodes; cath++){
855 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
856 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
859 if(!isClearEvent) return kFALSE;
861 Int_t goodForEff = kBoardEff;
863 Int_t ineffSlat = -1;
864 Int_t ineffDetElId = -1;
865 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
866 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
867 Int_t firstBoard = boardThatTriggered[0][kBending][0];
868 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
869 for(Int_t ch=0; ch<fgkNchambers; ch++){
870 Bool_t isCurrChIneff = kFALSE;
871 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
873 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
874 currSlat = ineffDetElId%100;
875 ineffSlat = currSlat;
876 isCurrChIneff = kTRUE;
878 if(currSlat!=firstSlat) {
879 AddEffInfo(pattern, 20, kChEff);
882 Bool_t atLeastOneLoc=kFALSE;
883 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
884 for(Int_t loc=0; loc<fgkNlocations; loc++){
885 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
886 if(isCurrChIneff) currBoard = ineffBoard[loc];
887 if(currBoard==firstBoard){
892 if(!atLeastOneLoc) goodForEff = kSlatEff;
893 } // end chamber loop
895 AddEffInfo(pattern, firstSlat, goodForEff);