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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"
a0dc65b4 50#include "AliMUONRecoParam.h"
7ec3b9cf 51#include "AliMUONTrack.h"
52#include "AliMUONTrackExtrap.h"
53#include "AliMUONTrackParam.h"
54#include "AliMUONVTrackStore.h"
55#include "AliMUONVTriggerStore.h"
7771752e 56#include "AliMpPad.h"
7771752e 57#include "AliMpSegmentation.h"
7ec3b9cf 58#include "AliMpVSegmentation.h"
fda59e58 59#include "AliMpDEManager.h"
60#include "AliMUONReconstructor.h"
683cb6c5 61#include "AliMUONTriggerTrack.h"
62#include "AliMUONVTriggerTrackStore.h"
63
64#include "AliMpConstants.h"
ea94c18b 65
ea94c18b 66#include "AliLog.h"
7771752e 67#include "AliTracker.h"
ea94c18b 68
7771752e 69#include <Riostream.h>
7ec3b9cf 70#include <TArrayS.h>
7771752e 71#include <TClonesArray.h>
72#include <TMath.h>
73#include <TMatrixD.h>
683cb6c5 74#include <TROOT.h>
75#include <TDirectory.h>
76#include <TFile.h>
77#include <TSystem.h>
78
79#include <cassert>
7771752e 80
81/// \cond CLASSIMP
82ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
83/// \endcond
84
85
86//______________________________________________________________________________
a0dc65b4 87AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
88 const AliMUONGeometryTransformer& transformer,
7ec3b9cf 89 const AliMUONDigitMaker& digitMaker)
a0dc65b4 90: TObject(),
9b1e069f 91fkRecoParam(recoParam),
92fkTransformer(transformer),
93fkDigitMaker(digitMaker),
a0dc65b4 94fDeltaZ(0.0),
95fTrigCovariance(0x0),
96fkMaxDistance(99999.)
7771752e 97{
98 /// Default constructor
683cb6c5 99 InitMembers();
f7a1cc68 100 AliMUONTrackExtrap::SetField();
7771752e 101}
102
103
104//______________________________________________________________________________
105AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
106{
7ec3b9cf 107 /// Destructor
683cb6c5 108 delete fTrigCovariance;
7771752e 109}
110
111
112//______________________________________________________________________________
683cb6c5 113void AliMUONTrackHitPattern::InitMembers()
7771752e 114{
683cb6c5 115 //
116 /// Initialize data members
117 //
118 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
119
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;
124
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;
683cb6c5 132}
fda59e58 133
7ec3b9cf 134
683cb6c5 135//_____________________________________________________________________________
136void AliMUONTrackHitPattern::CheckConstants() const
137{
138/// Check consistence of redefined constants
139
140 assert(fgkNcathodes == AliMpConstants::NofCathodes());
141 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
142 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
143}
144
145
146//______________________________________________________________________________
9b1e069f 147void AliMUONTrackHitPattern::ExecuteValidation(const AliMUONVTrackStore& trackStore,
683cb6c5 148 const AliMUONVTriggerTrackStore& triggerTrackStore,
149 const AliMUONVTriggerStore& triggerStore) const
150{
151 //
152 /// Main method:
153 /// Loops on reco tracks, extrapolates them to trigger chambers
154 /// and searches for matching trigger tracks and digits
155 //
156
157 AliMUONDigitStoreV1 digitStore;
158 TriggerDigits(triggerStore,digitStore);
159
160
161 TIter itTrack(trackStore.CreateIterator());
162 AliMUONTrack* track;
163
164 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
165
166 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
167 {
168 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
169
170 ApplyMCSCorrections(trackParam);
171 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
172
173 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
174
175 UShort_t pattern = GetHitPattern(trackParam, matchedTriggerTrack, digitStore);
176 track->SetHitsPatternInTrigCh(pattern);
177 }
178}
179
180
181//______________________________________________________________________________
182AliMUONTriggerTrack *
183AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
184 AliMUONTrackParam& trackParam,
185 const AliMUONVTriggerTrackStore& triggerTrackStore,
186 const AliMUONVTriggerStore& triggerStore) const
187{
188 //
189 /// Match track with trigger track
190 //
191
192 Int_t matchTrigger = 0;
193 Int_t loTrgNum(-1);
194 Double_t distTriggerTrack[3], sigma2[3];
195 Double_t chi2;
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;
7ec3b9cf 201
683cb6c5 202 const TMatrixD& kParamCov = trackParam.GetCovariances();
7ec3b9cf 203
683cb6c5 204 Double_t xTrack = trackParam.GetNonBendingCoor();
205 Double_t yTrack = trackParam.GetBendingCoor();
206 Double_t ySlopeTrack = trackParam.GetBendingSlope();
207
208 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
209 TMatrixD trackCov(3,3);
210 trackCov.Zero();
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);
216
217 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
218
219 Bool_t isCovOK = kTRUE;
220
221 if (sumCov.Determinant() != 0) {
222 sumCov.Invert();
223 } else {
224 AliWarning(" Determinant = 0");
225 isCovOK = kFALSE;
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];
234 }
fda59e58 235
683cb6c5 236 AliMUONTriggerTrack *triggerTrack;
237 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
238 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
239 {
240 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
241 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
242 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
243
244 if(isCovOK){
245 TMatrixD paramDiff(3,1);
246 for(Int_t iVar = 0; iVar < 3; iVar++)
247 paramDiff(iVar,0) = distTriggerTrack[iVar];
248
249 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
250 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
251 chi2 = chi2M(0,0);
252 }
253 else {
254 chi2 = 0.;
255 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
256 }
fda59e58 257
683cb6c5 258 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
a0dc65b4 259 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 260 {
683cb6c5 261 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
a0dc65b4 262 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 263 {
683cb6c5 264 if(isDoubleTrack)
265 {
266 doubleMatch = loTrgNum;
267 doubleChi2 = chi2MatchTrigger;
268 doubleTriggerTrack = matchedTriggerTrack;
fda59e58 269 }
683cb6c5 270 minChi2MatchTrigger = chi2;
271 chi2MatchTrigger = chi2;
272 loTrgNum = triggerTrack->GetLoTrgNum();
273 matchedTriggerTrack = triggerTrack;
274 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
275 matchTrigger = 1;
276 if(locTrg->LoLpt()>0) matchTrigger = 2;
277 if(locTrg->LoHpt()>0) matchTrigger = 3;
278 }
279 else if(isDoubleTrack)
280 {
281 doubleMatch = triggerTrack->GetLoTrgNum();
282 doubleChi2 = chi2;
7ec3b9cf 283 }
7771752e 284 }
683cb6c5 285 }
286 if(doubleMatch>=0)
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))
291 {
292 if(locTrg1->LoHpt()>0) matchTrigger=3;
293 else matchTrigger = 2;
294 loTrgNum = doubleMatch;
295 chi2MatchTrigger = doubleChi2;
296 matchedTriggerTrack = doubleTriggerTrack;
297 }
298 }
299
300 track->SetMatchTrigger(matchTrigger);
301 track->SetLoTrgNum(loTrgNum);
302 track->SetChi2MatchTrigger(chi2MatchTrigger);
303
304 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
305
306 if (locTrg)
307 {
d72d7b9e 308 Int_t deviation = locTrg->GetDeviation();
683cb6c5 309 track->SetLocalTrigger(locTrg->LoCircuit(),
310 locTrg->LoStripX(),
311 locTrg->LoStripY(),
c79ae710 312 deviation,
683cb6c5 313 locTrg->LoLpt(),
314 locTrg->LoHpt());
315 }
316
317 return matchedTriggerTrack;
318}
319
320
321//______________________________________________________________________________
322UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam,
323 AliMUONTriggerTrack* matchedTriggerTrack,
324 AliMUONVDigitStore& digitStore) const
325{
326 //
327 /// Get hit pattern on trigger chambers for the current track
328 //
329 UShort_t pattern = 0;
330 Bool_t isMatch[2];
331 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
332
333 Bool_t patternFromTrigTrack = kFALSE;
334
335
336 // Calculate hit pattern from trigger track
337 if(matchedTriggerTrack){
338 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
339 }
340
341 if(patternFromTrigTrack) return pattern;
342
343
344 // Calculate hit pattern from tracker track propagation
345 // if hit pattern from trigger track failed
346
347 for(Int_t ch=0; ch<4; ++ch)
348 {
349 Int_t iChamber = kNTrackingCh+ch;
350 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
351 FindPadMatchingTrack(digitStore, trackParam, isMatch, iChamber);
352 for(Int_t cath=0; cath<2; ++cath)
353 {
354 if(isMatch[cath]) SetBit(pattern, cath, ch);
355 }
356 }
357 return pattern;
358}
359
360
361//______________________________________________________________________________
362void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
363{
364 //
365 /// Set hits pattern
366 //
367 const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
368 {0x08, 0x04, 0x02, 0x01}};
369 pattern |= kMask[cathode][chamber];
370}
371
372
373//______________________________________________________________________________
374void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
375{
376 //
377 /// Set info on efficiency calculation
378 //
379 pattern += effType << 8;
380 pattern += slat << 10;
381}
382
383
384//______________________________________________________________________________
385void
386AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
387{
388 //
389 /// Returns uncertainties on extrapolated position.
390 /// Takes into account Branson plane corrections in the iron wall.
391 //
392
393 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
394 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
395
396 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
397 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
398 return;
399}
400
401
402//______________________________________________________________________________
403Bool_t
404AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore,
405 AliMUONVDigitStore& digitStore) const
406{
407 //
408 /// make (S)Digit for trigger
409 //
410
411 digitStore.Clear();
412
413 AliMUONLocalTrigger* locTrg;
414 TIter next(triggerStore.CreateLocalIterator());
415
416 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
417 {
418 if (locTrg->IsNull()) continue;
419
420 TArrayS xyPattern[2];
421 locTrg->GetXPattern(xyPattern[0]);
422 locTrg->GetYPattern(xyPattern[1]);
423
424 // do we need this ? (Ch.F.)
425// for(Int_t cath=0; cath<2; ++cath)
426// {
427// for(Int_t ch=0; ch<4; ++ch)
428// {
429// if(xyPattern[cath][ch]==0) continue;
430// }
431// }
432
433 Int_t nBoard = locTrg->LoCircuit();
9b1e069f 434 fkDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore);
683cb6c5 435 }
436 return kTRUE;
7771752e 437}
438
439
440//______________________________________________________________________________
7ec3b9cf 441void
9b1e069f 442AliMUONTrackHitPattern::FindPadMatchingTrack(const AliMUONVDigitStore& digitStore,
7ec3b9cf 443 const AliMUONTrackParam& trackParam,
fda59e58 444 Bool_t isMatch[2], Int_t iChamber) const
7771752e 445{
446 //
683cb6c5 447 /// Given the tracker track position, searches for matching digits.
7771752e 448 //
449
450 Float_t minMatchDist[2];
451
7ec3b9cf 452 for(Int_t cath=0; cath<2; ++cath)
453 {
454 isMatch[cath]=kFALSE;
683cb6c5 455 minMatchDist[cath]=fkMaxDistance/10.;
7771752e 456 }
457
7ec3b9cf 458 TIter next(digitStore.CreateIterator());
459 AliMUONVDigit* mDigit;
fda59e58 460
7ec3b9cf 461 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
462 {
463 Int_t currDetElemId = mDigit->DetElemId();
fda59e58 464 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
465 if(currCh!=iChamber) continue;
7ec3b9cf 466 Int_t cathode = mDigit->Cathode();
467 Int_t ix = mDigit->PadX();
468 Int_t iy = mDigit->PadY();
469 Float_t xpad, ypad, zpad;
470 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
471 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
472
473 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
474 Float_t xlocal1 = pad.Position().X();
475 Float_t ylocal1 = pad.Position().Y();
476 Float_t dpx = pad.Dimensions().X();
477 Float_t dpy = pad.Dimensions().Y();
9b1e069f 478 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
7ec3b9cf 479 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
480 if(matchDist>minMatchDist[cathode])continue;
481 isMatch[cathode] = kTRUE;
fda59e58 482 if(isMatch[0] && isMatch[1]) break;
7ec3b9cf 483 minMatchDist[cathode] = matchDist;
7771752e 484 }
7771752e 485}
486
487
488//______________________________________________________________________________
7ec3b9cf 489Float_t
490AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
491 Float_t dpx, Float_t dpy,
492 const AliMUONTrackParam& trackParam) const
7771752e 493{
494 //
683cb6c5 495 /// Decides if the digit belongs to the tracker track.
7771752e 496 //
7771752e 497
fda59e58 498 AliMUONTrackParam trackParamAtPadZ(trackParam);
499 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
500
501 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
502 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
7771752e 503
a0dc65b4 504 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
fda59e58 505
506 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
507
508 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
509 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
510
511 Float_t maxDistX = kNSigma * sigmaX; // in cm
512 Float_t maxDistY = kNSigma * sigmaY; // in cm
7771752e 513
514 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
515 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
516
683cb6c5 517 Float_t matchDist = fkMaxDistance;
7771752e 518 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
fda59e58 519
7771752e 520 return matchDist;
521}
522
523
683cb6c5 524//_____________________________________________________________________________
9b1e069f 525Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(const AliMUONVDigitStore& digitStore, Int_t &detElemId,
683cb6c5 526 Float_t coor[2], Bool_t isMatch[2],
527 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
528{
529 //
530 /// Check slat and board number of digit matching trigger track
531 //
532
533 enum {kBending, kNonBending};
534
535 Float_t minMatchDist[fgkNcathodes];
536 Int_t padsInCheckArea[fgkNcathodes];
537
538 for(Int_t cath=0; cath<fgkNcathodes; cath++){
539 isMatch[cath] = kFALSE;
540 minMatchDist[cath] = fkMaxDistance/10.;
541 padsInCheckArea[cath] = 0;
542 }
543 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
544 Int_t ch = iChamber-10;
545 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
546 Float_t y = coor[1];
547 Int_t iSlat = detElemId%100;
548 Int_t trigDigitBendPlane = -1;
549 Int_t foundDetElemId = detElemId;
550 Float_t foundZmatch=999.;
551 Float_t yCoorAtPadZ=999.;
552
553 TIter next(digitStore.CreateIterator());
554 AliMUONVDigit* mDigit;
555 Int_t idigit=0;
556
557 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
558 {
559 idigit++;
560 Int_t currDetElemId = mDigit->DetElemId();
561 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
562 if(currCh!=iChamber) continue;
563 Int_t currSlat = currDetElemId%100;
564 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
565 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
566 Int_t cathode = mDigit->Cathode();
567 Int_t ix = mDigit->PadX();
568 Int_t iy = mDigit->PadY();
569 Float_t xpad, ypad, zpad;
570 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
571 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
572
573 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
574 Float_t xlocal1 = pad.Position().X();
575 Float_t ylocal1 = pad.Position().Y();
576 Float_t dpx = pad.Dimensions().X();
577 Float_t dpy = pad.Dimensions().Y();
9b1e069f 578 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
b5270f21 579 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]));
683cb6c5 580 // searching track intersection with chambers (second approximation)
581 if(ch%2==1){
582 //if(iChamber%2==1){
583 Float_t deltaZ = zpad - zRealMatch[0];
584 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
585 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));
586 }
587 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
588 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
589 if(matchDist>minMatchDist[cathode])continue;
590 isMatch[cathode] = kTRUE;
591 minMatchDist[cathode] = matchDist;
592 foundDetElemId = currDetElemId;
593 foundZmatch=zpad;
594 yCoorAtPadZ=y;
595 if(cathode==kBending) trigDigitBendPlane = idigit;
596 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
597 AliMpIntPair location = pad.GetLocation(loc);
598 nboard[cathode][loc] = location.GetFirst();
599 }
600 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
601 nboard[cathode][loc]=-1;
602 }
683cb6c5 603 }
604
605 for(Int_t cath=0; cath<fgkNcathodes; cath++){
606 if(padsInCheckArea[cath]>2) {
607 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
608 return -500;
609 }
610 }
611
612 if(isMatch[kBending] || isMatch[kNonBending]){
613 detElemId = foundDetElemId;
614 zRealMatch[ch] = foundZmatch;
615 coor[1] = yCoorAtPadZ;
616 }
617 return trigDigitBendPlane;
618}
619
620//_____________________________________________________________________________
621Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
622 Float_t dpx, Float_t dpy,
623 Float_t xTrackAtPad, Float_t yTrackAtPad) const
624{
625 //
626 /// Decides if the digit belongs to the trigger track.
627 //
628
a0dc65b4 629 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
b5270f21 630 if(maxDist<2.) maxDist = 2.;
a0dc65b4 631 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
683cb6c5 632
633 Float_t matchDist = fkMaxDistance;
634
635 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
636 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
637 Float_t maxDistX = maxDist;
638 Float_t maxDistY = maxDist;
639
640 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
641 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
642 return matchDist;
643}
644
645
646//_____________________________________________________________________________
647Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
648 Int_t chamber, Int_t cathode) const
649{
650 //
651 /// Given the (x,y) position in the chamber,
652 /// it returns the corresponding slat
653 //
654
655 Int_t resultingDetElemId = -1;
656 AliMpDEIterator it;
657 Float_t minDist = 999.;
658 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
659 Int_t detElemId = it.CurrentDEId();
660 Int_t ich = detElemId/100-10;
661 Float_t tolerance=0.2*((Float_t)ich);
662 Float_t currDist=9999.;
663
664 const AliMpVSegmentation* seg =
665 AliMpSegmentation::Instance()
666 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
667 if (!seg) continue;
668
669 Float_t deltax = seg->Dimensions().X();
670 Float_t deltay = seg->Dimensions().Y();
671 Float_t xlocal1 = -deltax;
672 Float_t ylocal1 = -deltay;
673 Float_t xlocal2 = +deltax;
674 Float_t ylocal2 = +deltay;
675 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
9b1e069f 676 fkTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
677 fkTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
683cb6c5 678
679 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
680
681 if(xg01>xg02){
682 xg1 = xg02;
683 xg2 = xg01;
684 }
685 if(yg01>yg02){
686 yg1 = yg02;
687 yg2 = yg01;
688 }
689
690 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
691 if(y<yg1) currDist = yg1-y;
692 else if(y>yg2) currDist = y-yg2;
693 if(currDist<minDist) {
694 resultingDetElemId = detElemId;
695 minDist=currDist;
696 continue;
697 }
698 resultingDetElemId = detElemId;
699 break;
700 }
701 } // loop on detElemId
702 return resultingDetElemId;
703}
704
705
706//_____________________________________________________________________________
707void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
708 Int_t detElemId, Int_t cathode,
709 Int_t localBoard[4]) const
710{
711 //
712 /// Given the (x,y) position in the chamber,
713 /// it returns the corresponding local board
714 //
715
716 for(Int_t loc=0; loc<fgkNlocations; loc++){
717 localBoard[loc]=-1;
718 }
719 Float_t xl, yl, zl;
9b1e069f 720 fkTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
683cb6c5 721 TVector2 pos(xl,yl);
722 const AliMpVSegmentation* seg =
723 AliMpSegmentation::Instance()
724 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
725 if (seg){
726 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
727 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
728 AliMpIntPair location = pad.GetLocation(loc);
729 localBoard[loc] = location.GetFirst();
730 }
731 }
732}
733
734
735//_____________________________________________________________________________
736Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
9b1e069f 737 const AliMUONTriggerTrack* matchedTrigTrack,
683cb6c5 738 AliMUONVDigitStore& digitStore) const
7771752e 739{
fda59e58 740 //
683cb6c5 741 /// It searches for matching digits around the trigger track.
fda59e58 742 //
7771752e 743
683cb6c5 744 enum {kBending, kNonBending};
7771752e 745
683cb6c5 746 Int_t chOrder[fgkNchambers] = {0,2,1,3};
747
748 TArrayF zRealMatch(fgkNchambers);
749 TArrayF correctFactor(fgkNcathodes);
750
751 Bool_t isMatch[fgkNcathodes];
752 for(Int_t cath=0; cath<fgkNcathodes; cath++){
753 isMatch[cath] = kFALSE;
754 }
755
756 TArrayF zMeanChamber(fgkNchambers);
757 for(Int_t ch=0; ch<fgkNchambers; ch++){
758 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
759 }
760
761 TArrayI digitPerTrack(fgkNcathodes);
762
763 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
764
765 TArrayI triggeredDigits;
766 triggeredDigits.Set(fgkNchambers);
767 triggeredDigits.Reset(-1);
768
769 TArrayI trigScheme[fgkNcathodes];
770 TArrayI slatThatTriggered[fgkNcathodes];
771 for(Int_t cath=0; cath<fgkNcathodes; cath++){
772 trigScheme[cath].Set(fgkNchambers);
773 slatThatTriggered[cath].Set(fgkNchambers);
774 }
775
776 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
777 TArrayI nboard[fgkNcathodes];
778 for(Int_t cath=0; cath<fgkNcathodes; cath++){
779 nboard[cath].Set(fgkNlocations);
780 }
781 Int_t ineffBoard[fgkNlocations];
782 for(Int_t loc=0; loc<fgkNlocations; loc++){
783 ineffBoard[loc] = -1;
784 }
785
786 digitPerTrack.Reset();
787 for(Int_t ch=0; ch<fgkNchambers; ch++){
788 zRealMatch[ch] = zMeanChamber[ch];
789 for(Int_t cath=0; cath<fgkNcathodes; cath++){
790 for(Int_t loc=0; loc<fgkNlocations; loc++){
791 boardThatTriggered[ch][cath][loc]=-1;
792 }
793 }
794 }
795
796 for(Int_t cath=0; cath<fgkNcathodes; cath++){
797 slatThatTriggered[cath].Reset(-1);
798 trigScheme[cath].Reset();
799 }
800
801 Bool_t isClearEvent = kTRUE;
802
803 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
804 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
805 Float_t thetaX = matchedTrigTrack->GetThetax();
806 Float_t thetaY = matchedTrigTrack->GetThetay();
807
808 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
809 Int_t currCh = chOrder[ch];
b5270f21 810 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
683cb6c5 811
812 for(Int_t cath=0; cath<fgkNcathodes; cath++){
813 correctFactor[cath]=1.;
814 }
815 // calculate corrections to trigger track theta
816 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
817 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
818
819 // searching track intersection with chambers (first approximation)
820 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
821 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
822 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
823 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
824 if(detElemIdFromTrack<0) {
825 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
826 continue;
827 }
828
829 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
830
831 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
832 // => Event not clear => Reject track
833 if(triggeredDigits[currCh]<-100){
834 isClearEvent = kFALSE;
835 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
836 break;
837 }
838
839 for(Int_t cath=0; cath<fgkNcathodes; cath++){
840 if(!isMatch[cath]) continue;
841 SetBit(pattern, cath, currCh);
842 digitPerTrack[cath]++;
843 trigScheme[cath][currCh]++;
844 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
845 for(Int_t loc=0; loc<fgkNlocations; loc++){
846 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
847 }
848 }
849 } // end chamber loop
850
851 for(Int_t cath=0; cath<fgkNcathodes; cath++){
852 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
853 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
854 }
855
856 if(!isClearEvent) return kFALSE;
857
858 Int_t goodForEff = kBoardEff;
859
860 Int_t ineffSlat = -1;
861 Int_t ineffDetElId = -1;
862 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
863 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
864 Int_t firstBoard = boardThatTriggered[0][kBending][0];
865 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
866 for(Int_t ch=0; ch<fgkNchambers; ch++){
867 Bool_t isCurrChIneff = kFALSE;
868 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
869 if(currSlat<0){
870 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
871 currSlat = ineffDetElId%100;
872 ineffSlat = currSlat;
873 isCurrChIneff = kTRUE;
874 }
875 if(currSlat!=firstSlat) {
876 AddEffInfo(pattern, 20, kChEff);
877 return kTRUE;
878 }
879 Bool_t atLeastOneLoc=kFALSE;
880 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
881 for(Int_t loc=0; loc<fgkNlocations; loc++){
882 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
883 if(isCurrChIneff) currBoard = ineffBoard[loc];
884 if(currBoard==firstBoard){
885 atLeastOneLoc=kTRUE;
886 break;
887 }
888 }
889 if(!atLeastOneLoc) goodForEff = kSlatEff;
890 } // end chamber loop
891
892 AddEffInfo(pattern, firstSlat, goodForEff);
893 return kTRUE;
7771752e 894}