]> git.uio.no Git - u/mrichter/AliRoot.git/blame - MUON/AliMUONTrackHitPattern.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Small correction for shifts in SSD (M. Van Leeuwen)
[u/mrichter/AliRoot.git] / MUON / AliMUONTrackHitPattern.cxx
CommitLineData
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"
61#include "AliMUONRecoParam.h"
683cb6c5 62#include "AliMUONTriggerTrack.h"
63#include "AliMUONVTriggerTrackStore.h"
64
65#include "AliMpConstants.h"
ea94c18b 66
67#include "AliMagF.h"
68#include "AliLog.h"
7771752e 69#include "AliTracker.h"
ea94c18b 70
7771752e 71#include <Riostream.h>
7ec3b9cf 72#include <TArrayS.h>
7771752e 73#include <TClonesArray.h>
74#include <TMath.h>
75#include <TMatrixD.h>
683cb6c5 76#include <TROOT.h>
77#include <TDirectory.h>
78#include <TFile.h>
79#include <TSystem.h>
80
81#include <cassert>
7771752e 82
83/// \cond CLASSIMP
84ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
85/// \endcond
86
87
88//______________________________________________________________________________
a0dc65b4 89AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
90 const AliMUONGeometryTransformer& transformer,
7ec3b9cf 91 const AliMUONDigitMaker& digitMaker)
a0dc65b4 92: TObject(),
93fRecoParam(recoParam),
94fTransformer(transformer),
95fDigitMaker(digitMaker),
96fDeltaZ(0.0),
97fTrigCovariance(0x0),
98fkMaxDistance(99999.)
7771752e 99{
100 /// Default constructor
683cb6c5 101 InitMembers();
7771752e 102
103 // Set magnetic field
104 const AliMagF* kField = AliTracker::GetFieldMap();
105 if (!kField) AliFatal("No field available");
106 AliMUONTrackExtrap::SetField(kField);
7771752e 107}
108
109
110//______________________________________________________________________________
111AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
112{
7ec3b9cf 113 /// Destructor
683cb6c5 114 delete fTrigCovariance;
7771752e 115}
116
117
118//______________________________________________________________________________
683cb6c5 119void AliMUONTrackHitPattern::InitMembers()
7771752e 120{
683cb6c5 121 //
122 /// Initialize data members
123 //
124 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
125
126 const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso();
127 const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso();
128 const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ;
129 const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ;
130
131 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
132 fTrigCovariance = new TMatrixD(3,3);
133 fTrigCovariance->Zero();
134 (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso;
135 (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso;
136 (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso;
137 (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend;
683cb6c5 138}
fda59e58 139
7ec3b9cf 140
683cb6c5 141//_____________________________________________________________________________
142void AliMUONTrackHitPattern::CheckConstants() const
143{
144/// Check consistence of redefined constants
145
146 assert(fgkNcathodes == AliMpConstants::NofCathodes());
147 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
148 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
149}
150
151
152//______________________________________________________________________________
153void AliMUONTrackHitPattern::ExecuteValidation(AliMUONVTrackStore& trackStore,
154 const AliMUONVTriggerTrackStore& triggerTrackStore,
155 const AliMUONVTriggerStore& triggerStore) const
156{
157 //
158 /// Main method:
159 /// Loops on reco tracks, extrapolates them to trigger chambers
160 /// and searches for matching trigger tracks and digits
161 //
162
163 AliMUONDigitStoreV1 digitStore;
164 TriggerDigits(triggerStore,digitStore);
165
166
167 TIter itTrack(trackStore.CreateIterator());
168 AliMUONTrack* track;
169
170 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
171
172 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
173 {
174 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
175
176 ApplyMCSCorrections(trackParam);
177 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
178
179 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
180
181 UShort_t pattern = GetHitPattern(trackParam, matchedTriggerTrack, digitStore);
182 track->SetHitsPatternInTrigCh(pattern);
183 }
184}
185
186
187//______________________________________________________________________________
188AliMUONTriggerTrack *
189AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
190 AliMUONTrackParam& trackParam,
191 const AliMUONVTriggerTrackStore& triggerTrackStore,
192 const AliMUONVTriggerStore& triggerStore) const
193{
194 //
195 /// Match track with trigger track
196 //
197
198 Int_t matchTrigger = 0;
199 Int_t loTrgNum(-1);
200 Double_t distTriggerTrack[3], sigma2[3];
201 Double_t chi2;
202 Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
203 Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
204 Double_t doubleChi2 = -1.;
205 AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
206 AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
7ec3b9cf 207
683cb6c5 208 const TMatrixD& kParamCov = trackParam.GetCovariances();
7ec3b9cf 209
683cb6c5 210 Double_t xTrack = trackParam.GetNonBendingCoor();
211 Double_t yTrack = trackParam.GetBendingCoor();
212 Double_t ySlopeTrack = trackParam.GetBendingSlope();
213
214 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
215 TMatrixD trackCov(3,3);
216 trackCov.Zero();
217 trackCov(0,0) = kParamCov(0,0);
218 trackCov(1,1) = kParamCov(2,2);
219 trackCov(2,2) = kParamCov(3,3);
220 trackCov(1,2) = kParamCov(2,3);
221 trackCov(2,1) = kParamCov(3,2);
222
223 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
224
225 Bool_t isCovOK = kTRUE;
226
227 if (sumCov.Determinant() != 0) {
228 sumCov.Invert();
229 } else {
230 AliWarning(" Determinant = 0");
231 isCovOK = kFALSE;
232 sigma2[0] = kParamCov(0,0);
233 sigma2[1] = kParamCov(2,2);
234 sigma2[2] = kParamCov(3,3);
235 // sigma of distributions (trigger-track) X,Y,slopeY
236 const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(),
237 AliMUONConstants::TriggerBendingReso(),
238 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ};
239 for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar];
240 }
fda59e58 241
683cb6c5 242 AliMUONTriggerTrack *triggerTrack;
243 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
244 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
245 {
246 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
247 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
248 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
249
250 if(isCovOK){
251 TMatrixD paramDiff(3,1);
252 for(Int_t iVar = 0; iVar < 3; iVar++)
253 paramDiff(iVar,0) = distTriggerTrack[iVar];
254
255 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
256 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
257 chi2 = chi2M(0,0);
258 }
259 else {
260 chi2 = 0.;
261 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
262 }
fda59e58 263
683cb6c5 264 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
a0dc65b4 265 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 266 {
683cb6c5 267 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
a0dc65b4 268 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 269 {
683cb6c5 270 if(isDoubleTrack)
271 {
272 doubleMatch = loTrgNum;
273 doubleChi2 = chi2MatchTrigger;
274 doubleTriggerTrack = matchedTriggerTrack;
fda59e58 275 }
683cb6c5 276 minChi2MatchTrigger = chi2;
277 chi2MatchTrigger = chi2;
278 loTrgNum = triggerTrack->GetLoTrgNum();
279 matchedTriggerTrack = triggerTrack;
280 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
281 matchTrigger = 1;
282 if(locTrg->LoLpt()>0) matchTrigger = 2;
283 if(locTrg->LoHpt()>0) matchTrigger = 3;
284 }
285 else if(isDoubleTrack)
286 {
287 doubleMatch = triggerTrack->GetLoTrgNum();
288 doubleChi2 = chi2;
7ec3b9cf 289 }
7771752e 290 }
683cb6c5 291 }
292 if(doubleMatch>=0)
293 { // If two trigger tracks match, select the one passing more trigger cuts
294 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
295 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
296 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
297 {
298 if(locTrg1->LoHpt()>0) matchTrigger=3;
299 else matchTrigger = 2;
300 loTrgNum = doubleMatch;
301 chi2MatchTrigger = doubleChi2;
302 matchedTriggerTrack = doubleTriggerTrack;
303 }
304 }
305
306 track->SetMatchTrigger(matchTrigger);
307 track->SetLoTrgNum(loTrgNum);
308 track->SetChi2MatchTrigger(chi2MatchTrigger);
309
310 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
311
312 if (locTrg)
313 {
d72d7b9e 314 Int_t deviation = locTrg->GetDeviation();
683cb6c5 315 track->SetLocalTrigger(locTrg->LoCircuit(),
316 locTrg->LoStripX(),
317 locTrg->LoStripY(),
c79ae710 318 deviation,
683cb6c5 319 locTrg->LoLpt(),
320 locTrg->LoHpt());
321 }
322
323 return matchedTriggerTrack;
324}
325
326
327//______________________________________________________________________________
328UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam,
329 AliMUONTriggerTrack* matchedTriggerTrack,
330 AliMUONVDigitStore& digitStore) const
331{
332 //
333 /// Get hit pattern on trigger chambers for the current track
334 //
335 UShort_t pattern = 0;
336 Bool_t isMatch[2];
337 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
338
339 Bool_t patternFromTrigTrack = kFALSE;
340
341
342 // Calculate hit pattern from trigger track
343 if(matchedTriggerTrack){
344 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
345 }
346
347 if(patternFromTrigTrack) return pattern;
348
349
350 // Calculate hit pattern from tracker track propagation
351 // if hit pattern from trigger track failed
352
353 for(Int_t ch=0; ch<4; ++ch)
354 {
355 Int_t iChamber = kNTrackingCh+ch;
356 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
357 FindPadMatchingTrack(digitStore, trackParam, isMatch, iChamber);
358 for(Int_t cath=0; cath<2; ++cath)
359 {
360 if(isMatch[cath]) SetBit(pattern, cath, ch);
361 }
362 }
363 return pattern;
364}
365
366
367//______________________________________________________________________________
368void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
369{
370 //
371 /// Set hits pattern
372 //
373 const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
374 {0x08, 0x04, 0x02, 0x01}};
375 pattern |= kMask[cathode][chamber];
376}
377
378
379//______________________________________________________________________________
380void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
381{
382 //
383 /// Set info on efficiency calculation
384 //
385 pattern += effType << 8;
386 pattern += slat << 10;
387}
388
389
390//______________________________________________________________________________
391void
392AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
393{
394 //
395 /// Returns uncertainties on extrapolated position.
396 /// Takes into account Branson plane corrections in the iron wall.
397 //
398
399 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
400 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
401
402 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
403 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
404 return;
405}
406
407
408//______________________________________________________________________________
409Bool_t
410AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore,
411 AliMUONVDigitStore& digitStore) const
412{
413 //
414 /// make (S)Digit for trigger
415 //
416
417 digitStore.Clear();
418
419 AliMUONLocalTrigger* locTrg;
420 TIter next(triggerStore.CreateLocalIterator());
421
422 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
423 {
424 if (locTrg->IsNull()) continue;
425
426 TArrayS xyPattern[2];
427 locTrg->GetXPattern(xyPattern[0]);
428 locTrg->GetYPattern(xyPattern[1]);
429
430 // do we need this ? (Ch.F.)
431// for(Int_t cath=0; cath<2; ++cath)
432// {
433// for(Int_t ch=0; ch<4; ++ch)
434// {
435// if(xyPattern[cath][ch]==0) continue;
436// }
437// }
438
439 Int_t nBoard = locTrg->LoCircuit();
440 fDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore);
441 }
442 return kTRUE;
7771752e 443}
444
445
446//______________________________________________________________________________
7ec3b9cf 447void
448AliMUONTrackHitPattern::FindPadMatchingTrack(AliMUONVDigitStore& digitStore,
449 const AliMUONTrackParam& trackParam,
fda59e58 450 Bool_t isMatch[2], Int_t iChamber) const
7771752e 451{
452 //
683cb6c5 453 /// Given the tracker track position, searches for matching digits.
7771752e 454 //
455
456 Float_t minMatchDist[2];
457
7ec3b9cf 458 for(Int_t cath=0; cath<2; ++cath)
459 {
460 isMatch[cath]=kFALSE;
683cb6c5 461 minMatchDist[cath]=fkMaxDistance/10.;
7771752e 462 }
463
7ec3b9cf 464 TIter next(digitStore.CreateIterator());
465 AliMUONVDigit* mDigit;
fda59e58 466
7ec3b9cf 467 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
468 {
469 Int_t currDetElemId = mDigit->DetElemId();
fda59e58 470 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
471 if(currCh!=iChamber) continue;
7ec3b9cf 472 Int_t cathode = mDigit->Cathode();
473 Int_t ix = mDigit->PadX();
474 Int_t iy = mDigit->PadY();
475 Float_t xpad, ypad, zpad;
476 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
477 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
478
479 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
480 Float_t xlocal1 = pad.Position().X();
481 Float_t ylocal1 = pad.Position().Y();
482 Float_t dpx = pad.Dimensions().X();
483 Float_t dpy = pad.Dimensions().Y();
484 fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
485 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
486 if(matchDist>minMatchDist[cathode])continue;
487 isMatch[cathode] = kTRUE;
fda59e58 488 if(isMatch[0] && isMatch[1]) break;
7ec3b9cf 489 minMatchDist[cathode] = matchDist;
7771752e 490 }
7771752e 491}
492
493
494//______________________________________________________________________________
7ec3b9cf 495Float_t
496AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
497 Float_t dpx, Float_t dpy,
498 const AliMUONTrackParam& trackParam) const
7771752e 499{
500 //
683cb6c5 501 /// Decides if the digit belongs to the tracker track.
7771752e 502 //
7771752e 503
fda59e58 504 AliMUONTrackParam trackParamAtPadZ(trackParam);
505 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
506
507 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
508 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
7771752e 509
a0dc65b4 510 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
fda59e58 511
512 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
513
514 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
515 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
516
517 Float_t maxDistX = kNSigma * sigmaX; // in cm
518 Float_t maxDistY = kNSigma * sigmaY; // in cm
7771752e 519
520 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
521 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
522
683cb6c5 523 Float_t matchDist = fkMaxDistance;
7771752e 524 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
fda59e58 525
7771752e 526 return matchDist;
527}
528
529
683cb6c5 530//_____________________________________________________________________________
531Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(AliMUONVDigitStore& digitStore, Int_t &detElemId,
532 Float_t coor[2], Bool_t isMatch[2],
533 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
534{
535 //
536 /// Check slat and board number of digit matching trigger track
537 //
538
539 enum {kBending, kNonBending};
540
541 Float_t minMatchDist[fgkNcathodes];
542 Int_t padsInCheckArea[fgkNcathodes];
543
544 for(Int_t cath=0; cath<fgkNcathodes; cath++){
545 isMatch[cath] = kFALSE;
546 minMatchDist[cath] = fkMaxDistance/10.;
547 padsInCheckArea[cath] = 0;
548 }
549 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
550 Int_t ch = iChamber-10;
551 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
552 Float_t y = coor[1];
553 Int_t iSlat = detElemId%100;
554 Int_t trigDigitBendPlane = -1;
555 Int_t foundDetElemId = detElemId;
556 Float_t foundZmatch=999.;
557 Float_t yCoorAtPadZ=999.;
558
559 TIter next(digitStore.CreateIterator());
560 AliMUONVDigit* mDigit;
561 Int_t idigit=0;
562
563 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
564 {
565 idigit++;
566 Int_t currDetElemId = mDigit->DetElemId();
567 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
568 if(currCh!=iChamber) continue;
569 Int_t currSlat = currDetElemId%100;
570 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
571 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
572 Int_t cathode = mDigit->Cathode();
573 Int_t ix = mDigit->PadX();
574 Int_t iy = mDigit->PadY();
575 Float_t xpad, ypad, zpad;
576 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
577 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
578
579 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
580 Float_t xlocal1 = pad.Position().X();
581 Float_t ylocal1 = pad.Position().Y();
582 Float_t dpx = pad.Dimensions().X();
583 Float_t dpy = pad.Dimensions().Y();
584 fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
b5270f21 585 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 586 // searching track intersection with chambers (second approximation)
587 if(ch%2==1){
588 //if(iChamber%2==1){
589 Float_t deltaZ = zpad - zRealMatch[0];
590 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
591 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));
592 }
593 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
594 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
595 if(matchDist>minMatchDist[cathode])continue;
596 isMatch[cathode] = kTRUE;
597 minMatchDist[cathode] = matchDist;
598 foundDetElemId = currDetElemId;
599 foundZmatch=zpad;
600 yCoorAtPadZ=y;
601 if(cathode==kBending) trigDigitBendPlane = idigit;
602 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
603 AliMpIntPair location = pad.GetLocation(loc);
604 nboard[cathode][loc] = location.GetFirst();
605 }
606 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
607 nboard[cathode][loc]=-1;
608 }
683cb6c5 609 }
610
611 for(Int_t cath=0; cath<fgkNcathodes; cath++){
612 if(padsInCheckArea[cath]>2) {
613 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
614 return -500;
615 }
616 }
617
618 if(isMatch[kBending] || isMatch[kNonBending]){
619 detElemId = foundDetElemId;
620 zRealMatch[ch] = foundZmatch;
621 coor[1] = yCoorAtPadZ;
622 }
623 return trigDigitBendPlane;
624}
625
626//_____________________________________________________________________________
627Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
628 Float_t dpx, Float_t dpy,
629 Float_t xTrackAtPad, Float_t yTrackAtPad) const
630{
631 //
632 /// Decides if the digit belongs to the trigger track.
633 //
634
a0dc65b4 635 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
b5270f21 636 if(maxDist<2.) maxDist = 2.;
a0dc65b4 637 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
683cb6c5 638
639 Float_t matchDist = fkMaxDistance;
640
641 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
642 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
643 Float_t maxDistX = maxDist;
644 Float_t maxDistY = maxDist;
645
646 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
647 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
648 return matchDist;
649}
650
651
652//_____________________________________________________________________________
653Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
654 Int_t chamber, Int_t cathode) const
655{
656 //
657 /// Given the (x,y) position in the chamber,
658 /// it returns the corresponding slat
659 //
660
661 Int_t resultingDetElemId = -1;
662 AliMpDEIterator it;
663 Float_t minDist = 999.;
664 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
665 Int_t detElemId = it.CurrentDEId();
666 Int_t ich = detElemId/100-10;
667 Float_t tolerance=0.2*((Float_t)ich);
668 Float_t currDist=9999.;
669
670 const AliMpVSegmentation* seg =
671 AliMpSegmentation::Instance()
672 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
673 if (!seg) continue;
674
675 Float_t deltax = seg->Dimensions().X();
676 Float_t deltay = seg->Dimensions().Y();
677 Float_t xlocal1 = -deltax;
678 Float_t ylocal1 = -deltay;
679 Float_t xlocal2 = +deltax;
680 Float_t ylocal2 = +deltay;
681 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
682 fTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
683 fTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
684
685 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
686
687 if(xg01>xg02){
688 xg1 = xg02;
689 xg2 = xg01;
690 }
691 if(yg01>yg02){
692 yg1 = yg02;
693 yg2 = yg01;
694 }
695
696 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
697 if(y<yg1) currDist = yg1-y;
698 else if(y>yg2) currDist = y-yg2;
699 if(currDist<minDist) {
700 resultingDetElemId = detElemId;
701 minDist=currDist;
702 continue;
703 }
704 resultingDetElemId = detElemId;
705 break;
706 }
707 } // loop on detElemId
708 return resultingDetElemId;
709}
710
711
712//_____________________________________________________________________________
713void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
714 Int_t detElemId, Int_t cathode,
715 Int_t localBoard[4]) const
716{
717 //
718 /// Given the (x,y) position in the chamber,
719 /// it returns the corresponding local board
720 //
721
722 for(Int_t loc=0; loc<fgkNlocations; loc++){
723 localBoard[loc]=-1;
724 }
725 Float_t xl, yl, zl;
726 fTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
727 TVector2 pos(xl,yl);
728 const AliMpVSegmentation* seg =
729 AliMpSegmentation::Instance()
730 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
731 if (seg){
732 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
733 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
734 AliMpIntPair location = pad.GetLocation(loc);
735 localBoard[loc] = location.GetFirst();
736 }
737 }
738}
739
740
741//_____________________________________________________________________________
742Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
743 AliMUONTriggerTrack *matchedTrigTrack,
744 AliMUONVDigitStore& digitStore) const
7771752e 745{
fda59e58 746 //
683cb6c5 747 /// It searches for matching digits around the trigger track.
fda59e58 748 //
7771752e 749
683cb6c5 750 enum {kBending, kNonBending};
7771752e 751
683cb6c5 752 Int_t chOrder[fgkNchambers] = {0,2,1,3};
753
754 TArrayF zRealMatch(fgkNchambers);
755 TArrayF correctFactor(fgkNcathodes);
756
757 Bool_t isMatch[fgkNcathodes];
758 for(Int_t cath=0; cath<fgkNcathodes; cath++){
759 isMatch[cath] = kFALSE;
760 }
761
762 TArrayF zMeanChamber(fgkNchambers);
763 for(Int_t ch=0; ch<fgkNchambers; ch++){
764 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
765 }
766
767 TArrayI digitPerTrack(fgkNcathodes);
768
769 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
770
771 TArrayI triggeredDigits;
772 triggeredDigits.Set(fgkNchambers);
773 triggeredDigits.Reset(-1);
774
775 TArrayI trigScheme[fgkNcathodes];
776 TArrayI slatThatTriggered[fgkNcathodes];
777 for(Int_t cath=0; cath<fgkNcathodes; cath++){
778 trigScheme[cath].Set(fgkNchambers);
779 slatThatTriggered[cath].Set(fgkNchambers);
780 }
781
782 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
783 TArrayI nboard[fgkNcathodes];
784 for(Int_t cath=0; cath<fgkNcathodes; cath++){
785 nboard[cath].Set(fgkNlocations);
786 }
787 Int_t ineffBoard[fgkNlocations];
788 for(Int_t loc=0; loc<fgkNlocations; loc++){
789 ineffBoard[loc] = -1;
790 }
791
792 digitPerTrack.Reset();
793 for(Int_t ch=0; ch<fgkNchambers; ch++){
794 zRealMatch[ch] = zMeanChamber[ch];
795 for(Int_t cath=0; cath<fgkNcathodes; cath++){
796 for(Int_t loc=0; loc<fgkNlocations; loc++){
797 boardThatTriggered[ch][cath][loc]=-1;
798 }
799 }
800 }
801
802 for(Int_t cath=0; cath<fgkNcathodes; cath++){
803 slatThatTriggered[cath].Reset(-1);
804 trigScheme[cath].Reset();
805 }
806
807 Bool_t isClearEvent = kTRUE;
808
809 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
810 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
811 Float_t thetaX = matchedTrigTrack->GetThetax();
812 Float_t thetaY = matchedTrigTrack->GetThetay();
813
814 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
815 Int_t currCh = chOrder[ch];
b5270f21 816 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
683cb6c5 817
818 for(Int_t cath=0; cath<fgkNcathodes; cath++){
819 correctFactor[cath]=1.;
820 }
821 // calculate corrections to trigger track theta
822 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
823 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
824
825 // searching track intersection with chambers (first approximation)
826 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
827 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
828 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
829 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
830 if(detElemIdFromTrack<0) {
831 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
832 continue;
833 }
834
835 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
836
837 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
838 // => Event not clear => Reject track
839 if(triggeredDigits[currCh]<-100){
840 isClearEvent = kFALSE;
841 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
842 break;
843 }
844
845 for(Int_t cath=0; cath<fgkNcathodes; cath++){
846 if(!isMatch[cath]) continue;
847 SetBit(pattern, cath, currCh);
848 digitPerTrack[cath]++;
849 trigScheme[cath][currCh]++;
850 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
851 for(Int_t loc=0; loc<fgkNlocations; loc++){
852 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
853 }
854 }
855 } // end chamber loop
856
857 for(Int_t cath=0; cath<fgkNcathodes; cath++){
858 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
859 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
860 }
861
862 if(!isClearEvent) return kFALSE;
863
864 Int_t goodForEff = kBoardEff;
865
866 Int_t ineffSlat = -1;
867 Int_t ineffDetElId = -1;
868 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
869 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
870 Int_t firstBoard = boardThatTriggered[0][kBending][0];
871 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
872 for(Int_t ch=0; ch<fgkNchambers; ch++){
873 Bool_t isCurrChIneff = kFALSE;
874 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
875 if(currSlat<0){
876 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
877 currSlat = ineffDetElId%100;
878 ineffSlat = currSlat;
879 isCurrChIneff = kTRUE;
880 }
881 if(currSlat!=firstSlat) {
882 AddEffInfo(pattern, 20, kChEff);
883 return kTRUE;
884 }
885 Bool_t atLeastOneLoc=kFALSE;
886 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
887 for(Int_t loc=0; loc<fgkNlocations; loc++){
888 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
889 if(isCurrChIneff) currBoard = ineffBoard[loc];
890 if(currBoard==firstBoard){
891 atLeastOneLoc=kTRUE;
892 break;
893 }
894 }
895 if(!atLeastOneLoc) goodForEff = kSlatEff;
896 } // end chamber loop
897
898 AddEffInfo(pattern, firstSlat, goodForEff);
899 return kTRUE;
7771752e 900}