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New raw-reader class which deals with events taken from shared memory via the DATE...
[u/mrichter/AliRoot.git] / MUON / AliMUONTrackHitPattern.cxx
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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"
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 {
c79ae710 311 Int_t deviation = locTrg->LoDev();
312 Int_t sign = 0;
313 if ( !locTrg->LoSdev() && deviation ) sign=-1;
314 if ( !locTrg->LoSdev() && !deviation ) sign= 0;
315 if ( locTrg->LoSdev() == 1 ) sign=+1;
316 deviation *= sign;
317 deviation += 15;
683cb6c5 318 track->SetLocalTrigger(locTrg->LoCircuit(),
319 locTrg->LoStripX(),
320 locTrg->LoStripY(),
c79ae710 321 deviation,
683cb6c5 322 locTrg->LoLpt(),
323 locTrg->LoHpt());
324 }
325
326 return matchedTriggerTrack;
327}
328
329
330//______________________________________________________________________________
331UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTrackParam &trackParam,
332 AliMUONTriggerTrack* matchedTriggerTrack,
333 AliMUONVDigitStore& digitStore) const
334{
335 //
336 /// Get hit pattern on trigger chambers for the current track
337 //
338 UShort_t pattern = 0;
339 Bool_t isMatch[2];
340 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
341
342 Bool_t patternFromTrigTrack = kFALSE;
343
344
345 // Calculate hit pattern from trigger track
346 if(matchedTriggerTrack){
347 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
348 }
349
350 if(patternFromTrigTrack) return pattern;
351
352
353 // Calculate hit pattern from tracker track propagation
354 // if hit pattern from trigger track failed
355
356 for(Int_t ch=0; ch<4; ++ch)
357 {
358 Int_t iChamber = kNTrackingCh+ch;
359 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
360 FindPadMatchingTrack(digitStore, trackParam, isMatch, iChamber);
361 for(Int_t cath=0; cath<2; ++cath)
362 {
363 if(isMatch[cath]) SetBit(pattern, cath, ch);
364 }
365 }
366 return pattern;
367}
368
369
370//______________________________________________________________________________
371void AliMUONTrackHitPattern::SetBit(UShort_t& pattern, Int_t cathode, Int_t chamber) const
372{
373 //
374 /// Set hits pattern
375 //
376 const Int_t kMask[2][4]= {{0x80, 0x40, 0x20, 0x10},
377 {0x08, 0x04, 0x02, 0x01}};
378 pattern |= kMask[cathode][chamber];
379}
380
381
382//______________________________________________________________________________
383void AliMUONTrackHitPattern::AddEffInfo(UShort_t& pattern, Int_t slat, Int_t effType) const
384{
385 //
386 /// Set info on efficiency calculation
387 //
388 pattern += effType << 8;
389 pattern += slat << 10;
390}
391
392
393//______________________________________________________________________________
394void
395AliMUONTrackHitPattern::ApplyMCSCorrections(AliMUONTrackParam& trackParam) const
396{
397 //
398 /// Returns uncertainties on extrapolated position.
399 /// Takes into account Branson plane corrections in the iron wall.
400 //
401
402 const Float_t kZFilterOut = AliMUONConstants::MuonFilterZEnd();
403 const Float_t kFilterThickness = TMath::Abs(kZFilterOut-AliMUONConstants::MuonFilterZBeg()); // cm
404
405 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, kZFilterOut); // Extrap to muon filter end
406 AliMUONTrackExtrap::AddMCSEffect(&trackParam, kFilterThickness, AliMUONConstants::MuonFilterX0()); // Add MCS effects
407 return;
408}
409
410
411//______________________________________________________________________________
412Bool_t
413AliMUONTrackHitPattern::TriggerDigits(const AliMUONVTriggerStore& triggerStore,
414 AliMUONVDigitStore& digitStore) const
415{
416 //
417 /// make (S)Digit for trigger
418 //
419
420 digitStore.Clear();
421
422 AliMUONLocalTrigger* locTrg;
423 TIter next(triggerStore.CreateLocalIterator());
424
425 while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
426 {
427 if (locTrg->IsNull()) continue;
428
429 TArrayS xyPattern[2];
430 locTrg->GetXPattern(xyPattern[0]);
431 locTrg->GetYPattern(xyPattern[1]);
432
433 // do we need this ? (Ch.F.)
434// for(Int_t cath=0; cath<2; ++cath)
435// {
436// for(Int_t ch=0; ch<4; ++ch)
437// {
438// if(xyPattern[cath][ch]==0) continue;
439// }
440// }
441
442 Int_t nBoard = locTrg->LoCircuit();
443 fDigitMaker.TriggerDigits(nBoard, xyPattern, digitStore);
444 }
445 return kTRUE;
7771752e 446}
447
448
449//______________________________________________________________________________
7ec3b9cf 450void
451AliMUONTrackHitPattern::FindPadMatchingTrack(AliMUONVDigitStore& digitStore,
452 const AliMUONTrackParam& trackParam,
fda59e58 453 Bool_t isMatch[2], Int_t iChamber) const
7771752e 454{
455 //
683cb6c5 456 /// Given the tracker track position, searches for matching digits.
7771752e 457 //
458
459 Float_t minMatchDist[2];
460
7ec3b9cf 461 for(Int_t cath=0; cath<2; ++cath)
462 {
463 isMatch[cath]=kFALSE;
683cb6c5 464 minMatchDist[cath]=fkMaxDistance/10.;
7771752e 465 }
466
7ec3b9cf 467 TIter next(digitStore.CreateIterator());
468 AliMUONVDigit* mDigit;
fda59e58 469
7ec3b9cf 470 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
471 {
472 Int_t currDetElemId = mDigit->DetElemId();
fda59e58 473 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
474 if(currCh!=iChamber) continue;
7ec3b9cf 475 Int_t cathode = mDigit->Cathode();
476 Int_t ix = mDigit->PadX();
477 Int_t iy = mDigit->PadY();
478 Float_t xpad, ypad, zpad;
479 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
480 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
481
482 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
483 Float_t xlocal1 = pad.Position().X();
484 Float_t ylocal1 = pad.Position().Y();
485 Float_t dpx = pad.Dimensions().X();
486 Float_t dpy = pad.Dimensions().Y();
487 fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
488 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
489 if(matchDist>minMatchDist[cathode])continue;
490 isMatch[cathode] = kTRUE;
fda59e58 491 if(isMatch[0] && isMatch[1]) break;
7ec3b9cf 492 minMatchDist[cathode] = matchDist;
7771752e 493 }
7771752e 494}
495
496
497//______________________________________________________________________________
7ec3b9cf 498Float_t
499AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
500 Float_t dpx, Float_t dpy,
501 const AliMUONTrackParam& trackParam) const
7771752e 502{
503 //
683cb6c5 504 /// Decides if the digit belongs to the tracker track.
7771752e 505 //
7771752e 506
fda59e58 507 AliMUONTrackParam trackParamAtPadZ(trackParam);
508 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
509
510 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
511 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
7771752e 512
fda59e58 513 const Float_t kNSigma = AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTrigger();
514
515 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
516
517 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
518 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
519
520 Float_t maxDistX = kNSigma * sigmaX; // in cm
521 Float_t maxDistY = kNSigma * sigmaY; // in cm
7771752e 522
523 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
524 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
525
683cb6c5 526 Float_t matchDist = fkMaxDistance;
7771752e 527 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
fda59e58 528
7771752e 529 return matchDist;
530}
531
532
683cb6c5 533//_____________________________________________________________________________
534Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(AliMUONVDigitStore& digitStore, Int_t &detElemId,
535 Float_t coor[2], Bool_t isMatch[2],
536 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
537{
538 //
539 /// Check slat and board number of digit matching trigger track
540 //
541
542 enum {kBending, kNonBending};
543
544 Float_t minMatchDist[fgkNcathodes];
545 Int_t padsInCheckArea[fgkNcathodes];
546
547 for(Int_t cath=0; cath<fgkNcathodes; cath++){
548 isMatch[cath] = kFALSE;
549 minMatchDist[cath] = fkMaxDistance/10.;
550 padsInCheckArea[cath] = 0;
551 }
552 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
553 Int_t ch = iChamber-10;
554 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
555 Float_t y = coor[1];
556 Int_t iSlat = detElemId%100;
557 Int_t trigDigitBendPlane = -1;
558 Int_t foundDetElemId = detElemId;
559 Float_t foundZmatch=999.;
560 Float_t yCoorAtPadZ=999.;
561
562 TIter next(digitStore.CreateIterator());
563 AliMUONVDigit* mDigit;
564 Int_t idigit=0;
565
566 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
567 {
568 idigit++;
569 Int_t currDetElemId = mDigit->DetElemId();
570 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
571 if(currCh!=iChamber) continue;
572 Int_t currSlat = currDetElemId%100;
573 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
574 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
575 Int_t cathode = mDigit->Cathode();
576 Int_t ix = mDigit->PadX();
577 Int_t iy = mDigit->PadY();
578 Float_t xpad, ypad, zpad;
579 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
580 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
581
582 AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy),kTRUE);
583 Float_t xlocal1 = pad.Position().X();
584 Float_t ylocal1 = pad.Position().Y();
585 Float_t dpx = pad.Dimensions().X();
586 Float_t dpy = pad.Dimensions().Y();
587 fTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
588 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]));
589 // searching track intersection with chambers (second approximation)
590 if(ch%2==1){
591 //if(iChamber%2==1){
592 Float_t deltaZ = zpad - zRealMatch[0];
593 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
594 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));
595 }
596 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
597 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
598 if(matchDist>minMatchDist[cathode])continue;
599 isMatch[cathode] = kTRUE;
600 minMatchDist[cathode] = matchDist;
601 foundDetElemId = currDetElemId;
602 foundZmatch=zpad;
603 yCoorAtPadZ=y;
604 if(cathode==kBending) trigDigitBendPlane = idigit;
605 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
606 AliMpIntPair location = pad.GetLocation(loc);
607 nboard[cathode][loc] = location.GetFirst();
608 }
609 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
610 nboard[cathode][loc]=-1;
611 }
683cb6c5 612 }
613
614 for(Int_t cath=0; cath<fgkNcathodes; cath++){
615 if(padsInCheckArea[cath]>2) {
616 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
617 return -500;
618 }
619 }
620
621 if(isMatch[kBending] || isMatch[kNonBending]){
622 detElemId = foundDetElemId;
623 zRealMatch[ch] = foundZmatch;
624 coor[1] = yCoorAtPadZ;
625 }
626 return trigDigitBendPlane;
627}
628
629//_____________________________________________________________________________
630Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
631 Float_t dpx, Float_t dpy,
632 Float_t xTrackAtPad, Float_t yTrackAtPad) const
633{
634 //
635 /// Decides if the digit belongs to the trigger track.
636 //
637
638 Float_t maxDist = 2.;//3. // cm
639 Float_t maxDistCheckArea = 6.; // cm
640
641 Float_t matchDist = fkMaxDistance;
642
643 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
644 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
645 Float_t maxDistX = maxDist;
646 Float_t maxDistY = maxDist;
647
648 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
649 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
650 return matchDist;
651}
652
653
654//_____________________________________________________________________________
655Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
656 Int_t chamber, Int_t cathode) const
657{
658 //
659 /// Given the (x,y) position in the chamber,
660 /// it returns the corresponding slat
661 //
662
663 Int_t resultingDetElemId = -1;
664 AliMpDEIterator it;
665 Float_t minDist = 999.;
666 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
667 Int_t detElemId = it.CurrentDEId();
668 Int_t ich = detElemId/100-10;
669 Float_t tolerance=0.2*((Float_t)ich);
670 Float_t currDist=9999.;
671
672 const AliMpVSegmentation* seg =
673 AliMpSegmentation::Instance()
674 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
675 if (!seg) continue;
676
677 Float_t deltax = seg->Dimensions().X();
678 Float_t deltay = seg->Dimensions().Y();
679 Float_t xlocal1 = -deltax;
680 Float_t ylocal1 = -deltay;
681 Float_t xlocal2 = +deltax;
682 Float_t ylocal2 = +deltay;
683 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
684 fTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
685 fTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
686
687 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
688
689 if(xg01>xg02){
690 xg1 = xg02;
691 xg2 = xg01;
692 }
693 if(yg01>yg02){
694 yg1 = yg02;
695 yg2 = yg01;
696 }
697
698 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
699 if(y<yg1) currDist = yg1-y;
700 else if(y>yg2) currDist = y-yg2;
701 if(currDist<minDist) {
702 resultingDetElemId = detElemId;
703 minDist=currDist;
704 continue;
705 }
706 resultingDetElemId = detElemId;
707 break;
708 }
709 } // loop on detElemId
710 return resultingDetElemId;
711}
712
713
714//_____________________________________________________________________________
715void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
716 Int_t detElemId, Int_t cathode,
717 Int_t localBoard[4]) const
718{
719 //
720 /// Given the (x,y) position in the chamber,
721 /// it returns the corresponding local board
722 //
723
724 for(Int_t loc=0; loc<fgkNlocations; loc++){
725 localBoard[loc]=-1;
726 }
727 Float_t xl, yl, zl;
728 fTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
729 TVector2 pos(xl,yl);
730 const AliMpVSegmentation* seg =
731 AliMpSegmentation::Instance()
732 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
733 if (seg){
734 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
735 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
736 AliMpIntPair location = pad.GetLocation(loc);
737 localBoard[loc] = location.GetFirst();
738 }
739 }
740}
741
742
743//_____________________________________________________________________________
744Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
745 AliMUONTriggerTrack *matchedTrigTrack,
746 AliMUONVDigitStore& digitStore) const
7771752e 747{
fda59e58 748 //
683cb6c5 749 /// It searches for matching digits around the trigger track.
fda59e58 750 //
7771752e 751
683cb6c5 752 enum {kBending, kNonBending};
7771752e 753
683cb6c5 754 Int_t chOrder[fgkNchambers] = {0,2,1,3};
755
756 TArrayF zRealMatch(fgkNchambers);
757 TArrayF correctFactor(fgkNcathodes);
758
759 Bool_t isMatch[fgkNcathodes];
760 for(Int_t cath=0; cath<fgkNcathodes; cath++){
761 isMatch[cath] = kFALSE;
762 }
763
764 TArrayF zMeanChamber(fgkNchambers);
765 for(Int_t ch=0; ch<fgkNchambers; ch++){
766 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
767 }
768
769 TArrayI digitPerTrack(fgkNcathodes);
770
771 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
772
773 TArrayI triggeredDigits;
774 triggeredDigits.Set(fgkNchambers);
775 triggeredDigits.Reset(-1);
776
777 TArrayI trigScheme[fgkNcathodes];
778 TArrayI slatThatTriggered[fgkNcathodes];
779 for(Int_t cath=0; cath<fgkNcathodes; cath++){
780 trigScheme[cath].Set(fgkNchambers);
781 slatThatTriggered[cath].Set(fgkNchambers);
782 }
783
784 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
785 TArrayI nboard[fgkNcathodes];
786 for(Int_t cath=0; cath<fgkNcathodes; cath++){
787 nboard[cath].Set(fgkNlocations);
788 }
789 Int_t ineffBoard[fgkNlocations];
790 for(Int_t loc=0; loc<fgkNlocations; loc++){
791 ineffBoard[loc] = -1;
792 }
793
794 digitPerTrack.Reset();
795 for(Int_t ch=0; ch<fgkNchambers; ch++){
796 zRealMatch[ch] = zMeanChamber[ch];
797 for(Int_t cath=0; cath<fgkNcathodes; cath++){
798 for(Int_t loc=0; loc<fgkNlocations; loc++){
799 boardThatTriggered[ch][cath][loc]=-1;
800 }
801 }
802 }
803
804 for(Int_t cath=0; cath<fgkNcathodes; cath++){
805 slatThatTriggered[cath].Reset(-1);
806 trigScheme[cath].Reset();
807 }
808
809 Bool_t isClearEvent = kTRUE;
810
811 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
812 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
813 Float_t thetaX = matchedTrigTrack->GetThetax();
814 Float_t thetaY = matchedTrigTrack->GetThetay();
815
816 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
817 Int_t currCh = chOrder[ch];
818 AliDebug(2, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
819
820 for(Int_t cath=0; cath<fgkNcathodes; cath++){
821 correctFactor[cath]=1.;
822 }
823 // calculate corrections to trigger track theta
824 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
825 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
826
827 // searching track intersection with chambers (first approximation)
828 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
829 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
830 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
831 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
832 if(detElemIdFromTrack<0) {
833 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
834 continue;
835 }
836
837 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
838
839 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
840 // => Event not clear => Reject track
841 if(triggeredDigits[currCh]<-100){
842 isClearEvent = kFALSE;
843 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
844 break;
845 }
846
847 for(Int_t cath=0; cath<fgkNcathodes; cath++){
848 if(!isMatch[cath]) continue;
849 SetBit(pattern, cath, currCh);
850 digitPerTrack[cath]++;
851 trigScheme[cath][currCh]++;
852 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
853 for(Int_t loc=0; loc<fgkNlocations; loc++){
854 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
855 }
856 }
857 } // end chamber loop
858
859 for(Int_t cath=0; cath<fgkNcathodes; cath++){
860 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
861 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
862 }
863
864 if(!isClearEvent) return kFALSE;
865
866 Int_t goodForEff = kBoardEff;
867
868 Int_t ineffSlat = -1;
869 Int_t ineffDetElId = -1;
870 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
871 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
872 Int_t firstBoard = boardThatTriggered[0][kBending][0];
873 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
874 for(Int_t ch=0; ch<fgkNchambers; ch++){
875 Bool_t isCurrChIneff = kFALSE;
876 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
877 if(currSlat<0){
878 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
879 currSlat = ineffDetElId%100;
880 ineffSlat = currSlat;
881 isCurrChIneff = kTRUE;
882 }
883 if(currSlat!=firstSlat) {
884 AddEffInfo(pattern, 20, kChEff);
885 return kTRUE;
886 }
887 Bool_t atLeastOneLoc=kFALSE;
888 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
889 for(Int_t loc=0; loc<fgkNlocations; loc++){
890 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
891 if(isCurrChIneff) currBoard = ineffBoard[loc];
892 if(currBoard==firstBoard){
893 atLeastOneLoc=kTRUE;
894 break;
895 }
896 }
897 if(!atLeastOneLoc) goodForEff = kSlatEff;
898 } // end chamber loop
899
900 AddEffInfo(pattern, firstSlat, goodForEff);
901 return kTRUE;
7771752e 902}