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