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Replacement of AliMpIntPair object with algoritmic
[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"
a0dc65b4 50#include "AliMUONRecoParam.h"
7ec3b9cf 51#include "AliMUONTrack.h"
52#include "AliMUONTrackExtrap.h"
53#include "AliMUONTrackParam.h"
54#include "AliMUONVTrackStore.h"
55#include "AliMUONVTriggerStore.h"
7771752e 56#include "AliMpPad.h"
7771752e 57#include "AliMpSegmentation.h"
7ec3b9cf 58#include "AliMpVSegmentation.h"
fda59e58 59#include "AliMpDEManager.h"
60#include "AliMUONReconstructor.h"
683cb6c5 61#include "AliMUONTriggerTrack.h"
62#include "AliMUONVTriggerTrackStore.h"
63
64#include "AliMpConstants.h"
ea94c18b 65
ea94c18b 66#include "AliLog.h"
7771752e 67#include "AliTracker.h"
ea94c18b 68
7771752e 69#include <Riostream.h>
7ec3b9cf 70#include <TArrayS.h>
7771752e 71#include <TClonesArray.h>
72#include <TMath.h>
73#include <TMatrixD.h>
683cb6c5 74#include <TROOT.h>
75#include <TDirectory.h>
76#include <TFile.h>
77#include <TSystem.h>
78
79#include <cassert>
7771752e 80
81/// \cond CLASSIMP
82ClassImp(AliMUONTrackHitPattern) // Class implementation in ROOT context
83/// \endcond
84
85
86//______________________________________________________________________________
a0dc65b4 87AliMUONTrackHitPattern::AliMUONTrackHitPattern(const AliMUONRecoParam* recoParam,
88 const AliMUONGeometryTransformer& transformer,
7ec3b9cf 89 const AliMUONDigitMaker& digitMaker)
a0dc65b4 90: TObject(),
9b1e069f 91fkRecoParam(recoParam),
92fkTransformer(transformer),
93fkDigitMaker(digitMaker),
a0dc65b4 94fDeltaZ(0.0),
95fTrigCovariance(0x0),
96fkMaxDistance(99999.)
7771752e 97{
98 /// Default constructor
683cb6c5 99 InitMembers();
f7a1cc68 100 AliMUONTrackExtrap::SetField();
7771752e 101}
102
103
104//______________________________________________________________________________
105AliMUONTrackHitPattern::~AliMUONTrackHitPattern(void)
106{
7ec3b9cf 107 /// Destructor
683cb6c5 108 delete fTrigCovariance;
7771752e 109}
110
111
112//______________________________________________________________________________
683cb6c5 113void AliMUONTrackHitPattern::InitMembers()
7771752e 114{
683cb6c5 115 //
116 /// Initialize data members
117 //
118 fDeltaZ = TMath::Abs(AliMUONConstants::DefaultChamberZ(12) - AliMUONConstants::DefaultChamberZ(10));
119
120 const Double_t kTrigNonBendReso = AliMUONConstants::TriggerNonBendingReso();
121 const Double_t kTrigBendReso = AliMUONConstants::TriggerBendingReso();
122 const Double_t kTrigSlopeBendReso = 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ;
123 const Double_t kTrigCovSlopeBend = - kTrigBendReso * kTrigBendReso / fDeltaZ;
124
125 // Covariance matrix 3x3 (X,Y,slopeY) for trigger tracks
126 fTrigCovariance = new TMatrixD(3,3);
127 fTrigCovariance->Zero();
128 (*fTrigCovariance)(0,0) = kTrigNonBendReso * kTrigNonBendReso;
129 (*fTrigCovariance)(1,1) = kTrigBendReso * kTrigBendReso;
130 (*fTrigCovariance)(2,2) = kTrigSlopeBendReso * kTrigSlopeBendReso;
131 (*fTrigCovariance)(1,2) = (*fTrigCovariance)(2,1) = kTrigCovSlopeBend;
683cb6c5 132}
fda59e58 133
7ec3b9cf 134
683cb6c5 135//_____________________________________________________________________________
136void AliMUONTrackHitPattern::CheckConstants() const
137{
138/// Check consistence of redefined constants
139
140 assert(fgkNcathodes == AliMpConstants::NofCathodes());
141 assert(fgkNchambers == AliMpConstants::NofTriggerChambers());
142 assert(fgkNplanes == AliMpConstants::NofTriggerChambers() * fgkNcathodes);
143}
144
145
146//______________________________________________________________________________
9b1e069f 147void AliMUONTrackHitPattern::ExecuteValidation(const AliMUONVTrackStore& trackStore,
683cb6c5 148 const AliMUONVTriggerTrackStore& triggerTrackStore,
149 const AliMUONVTriggerStore& triggerStore) const
150{
151 //
152 /// Main method:
153 /// Loops on reco tracks, extrapolates them to trigger chambers
154 /// and searches for matching trigger tracks and digits
155 //
156
157 AliMUONDigitStoreV1 digitStore;
54355f2c 158 fkDigitMaker.TriggerToDigitsStore(triggerStore,digitStore);
683cb6c5 159
160
161 TIter itTrack(trackStore.CreateIterator());
162 AliMUONTrack* track;
163
164 const Int_t kFirstTrigCh = AliMUONConstants::NTrackingCh();
165
166 while ( ( track = static_cast<AliMUONTrack*>(itTrack()) ) )
167 {
168 AliMUONTrackParam trackParam(*((AliMUONTrackParam*) (track->GetTrackParamAtCluster()->Last())));
169
170 ApplyMCSCorrections(trackParam);
171 AliMUONTrackExtrap::ExtrapToZCov(&trackParam, AliMUONConstants::DefaultChamberZ(kFirstTrigCh)); // extrap to 1st trigger chamber
172
173 AliMUONTriggerTrack *matchedTriggerTrack = MatchTriggerTrack(track, trackParam, triggerTrackStore, triggerStore);
174
54355f2c 175 UShort_t pattern = GetHitPattern(matchedTriggerTrack, digitStore, &trackParam);
683cb6c5 176 track->SetHitsPatternInTrigCh(pattern);
177 }
178}
179
180
181//______________________________________________________________________________
182AliMUONTriggerTrack *
183AliMUONTrackHitPattern::MatchTriggerTrack(AliMUONTrack* track,
184 AliMUONTrackParam& trackParam,
185 const AliMUONVTriggerTrackStore& triggerTrackStore,
186 const AliMUONVTriggerStore& triggerStore) const
187{
188 //
189 /// Match track with trigger track
190 //
191
192 Int_t matchTrigger = 0;
193 Int_t loTrgNum(-1);
194 Double_t distTriggerTrack[3], sigma2[3];
195 Double_t chi2;
196 Double_t chi2MatchTrigger = 0., minChi2MatchTrigger = 999.;
197 Int_t doubleMatch = -1; // Check if track matches 2 trigger tracks
198 Double_t doubleChi2 = -1.;
199 AliMUONTriggerTrack* doubleTriggerTrack = 0x0;
200 AliMUONTriggerTrack* matchedTriggerTrack = 0x0;
7ec3b9cf 201
683cb6c5 202 const TMatrixD& kParamCov = trackParam.GetCovariances();
7ec3b9cf 203
683cb6c5 204 Double_t xTrack = trackParam.GetNonBendingCoor();
205 Double_t yTrack = trackParam.GetBendingCoor();
206 Double_t ySlopeTrack = trackParam.GetBendingSlope();
207
208 // Covariance matrix 3x3 (X,Y,slopeY) for tracker tracks
209 TMatrixD trackCov(3,3);
210 trackCov.Zero();
211 trackCov(0,0) = kParamCov(0,0);
212 trackCov(1,1) = kParamCov(2,2);
213 trackCov(2,2) = kParamCov(3,3);
214 trackCov(1,2) = kParamCov(2,3);
215 trackCov(2,1) = kParamCov(3,2);
216
217 TMatrixD sumCov(trackCov,TMatrixD::kPlus,*fTrigCovariance);
218
219 Bool_t isCovOK = kTRUE;
220
221 if (sumCov.Determinant() != 0) {
222 sumCov.Invert();
223 } else {
224 AliWarning(" Determinant = 0");
225 isCovOK = kFALSE;
226 sigma2[0] = kParamCov(0,0);
227 sigma2[1] = kParamCov(2,2);
228 sigma2[2] = kParamCov(3,3);
229 // sigma of distributions (trigger-track) X,Y,slopeY
230 const Double_t kDistSigma[3]={AliMUONConstants::TriggerNonBendingReso(),
231 AliMUONConstants::TriggerBendingReso(),
232 1.414 * AliMUONConstants::TriggerBendingReso()/fDeltaZ};
233 for (Int_t iVar = 0; iVar < 3; iVar++) sigma2[iVar] += kDistSigma[iVar] * kDistSigma[iVar];
234 }
fda59e58 235
683cb6c5 236 AliMUONTriggerTrack *triggerTrack;
237 TIter itTriggerTrack(triggerTrackStore.CreateIterator());
238 while ( ( triggerTrack = static_cast<AliMUONTriggerTrack*>(itTriggerTrack() ) ) )
239 {
240 distTriggerTrack[0] = triggerTrack->GetX11() - xTrack;
241 distTriggerTrack[1] = triggerTrack->GetY11() - yTrack;
242 distTriggerTrack[2] = TMath::Tan(triggerTrack->GetThetay()) - ySlopeTrack;
243
244 if(isCovOK){
245 TMatrixD paramDiff(3,1);
246 for(Int_t iVar = 0; iVar < 3; iVar++)
247 paramDiff(iVar,0) = distTriggerTrack[iVar];
248
249 TMatrixD tmp(sumCov,TMatrixD::kMult,paramDiff);
250 TMatrixD chi2M(paramDiff,TMatrixD::kTransposeMult,tmp);
251 chi2 = chi2M(0,0);
252 }
253 else {
254 chi2 = 0.;
255 for (Int_t iVar = 0; iVar < 3; iVar++) chi2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]/sigma2[iVar];
256 }
fda59e58 257
683cb6c5 258 chi2 /= 3.; // Normalized Chi2: 3 degrees of freedom (X,Y,slopeY)
a0dc65b4 259 if (chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 260 {
683cb6c5 261 Bool_t isDoubleTrack = (TMath::Abs(chi2 - minChi2MatchTrigger)<1.);
a0dc65b4 262 if (chi2 < minChi2MatchTrigger && chi2 < GetRecoParam()->GetMaxNormChi2MatchTrigger())
7ec3b9cf 263 {
683cb6c5 264 if(isDoubleTrack)
265 {
266 doubleMatch = loTrgNum;
267 doubleChi2 = chi2MatchTrigger;
268 doubleTriggerTrack = matchedTriggerTrack;
fda59e58 269 }
683cb6c5 270 minChi2MatchTrigger = chi2;
271 chi2MatchTrigger = chi2;
272 loTrgNum = triggerTrack->GetLoTrgNum();
273 matchedTriggerTrack = triggerTrack;
274 AliMUONLocalTrigger* locTrg = triggerStore.FindLocal(loTrgNum);
275 matchTrigger = 1;
276 if(locTrg->LoLpt()>0) matchTrigger = 2;
277 if(locTrg->LoHpt()>0) matchTrigger = 3;
278 }
279 else if(isDoubleTrack)
280 {
281 doubleMatch = triggerTrack->GetLoTrgNum();
282 doubleChi2 = chi2;
7ec3b9cf 283 }
7771752e 284 }
683cb6c5 285 }
286 if(doubleMatch>=0)
287 { // If two trigger tracks match, select the one passing more trigger cuts
288 AliDebug(1, Form("Two candidates found: %i and %i",loTrgNum,doubleMatch));
289 AliMUONLocalTrigger* locTrg1 = triggerStore.FindLocal(doubleMatch);
290 if((locTrg1->LoLpt()>0 && matchTrigger<2) || (locTrg1->LoHpt() && matchTrigger<3))
291 {
292 if(locTrg1->LoHpt()>0) matchTrigger=3;
293 else matchTrigger = 2;
294 loTrgNum = doubleMatch;
295 chi2MatchTrigger = doubleChi2;
296 matchedTriggerTrack = doubleTriggerTrack;
297 }
298 }
299
300 track->SetMatchTrigger(matchTrigger);
301 track->SetLoTrgNum(loTrgNum);
302 track->SetChi2MatchTrigger(chi2MatchTrigger);
303
304 AliMUONLocalTrigger* locTrg = static_cast<AliMUONLocalTrigger*>(triggerStore.FindLocal(loTrgNum));
305
306 if (locTrg)
307 {
d72d7b9e 308 Int_t deviation = locTrg->GetDeviation();
683cb6c5 309 track->SetLocalTrigger(locTrg->LoCircuit(),
310 locTrg->LoStripX(),
311 locTrg->LoStripY(),
c79ae710 312 deviation,
683cb6c5 313 locTrg->LoLpt(),
314 locTrg->LoHpt());
315 }
316
317 return matchedTriggerTrack;
318}
319
320
321//______________________________________________________________________________
54355f2c 322UShort_t AliMUONTrackHitPattern::GetHitPattern(AliMUONTriggerTrack* matchedTriggerTrack,
323 AliMUONVDigitStore& digitStore,
324 AliMUONTrackParam* trackParam) const
683cb6c5 325{
326 //
327 /// Get hit pattern on trigger chambers for the current track
328 //
329 UShort_t pattern = 0;
330 Bool_t isMatch[2];
331 const Int_t kNTrackingCh = AliMUONConstants::NTrackingCh();
332
333 Bool_t patternFromTrigTrack = kFALSE;
334
335
336 // Calculate hit pattern from trigger track
337 if(matchedTriggerTrack){
338 patternFromTrigTrack = PerformTrigTrackMatch(pattern, matchedTriggerTrack, digitStore);
339 }
340
341 if(patternFromTrigTrack) return pattern;
342
343
344 // Calculate hit pattern from tracker track propagation
54355f2c 345 // if hit pattern from trigger track failed and track parameters are provided
346
347 if(!trackParam) return 0;
683cb6c5 348
349 for(Int_t ch=0; ch<4; ++ch)
350 {
351 Int_t iChamber = kNTrackingCh+ch;
54355f2c 352 AliMUONTrackExtrap::ExtrapToZCov(trackParam, AliMUONConstants::DefaultChamberZ(iChamber));
353 FindPadMatchingTrack(digitStore, *trackParam, isMatch, iChamber);
683cb6c5 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
7771752e 404//______________________________________________________________________________
7ec3b9cf 405void
9b1e069f 406AliMUONTrackHitPattern::FindPadMatchingTrack(const AliMUONVDigitStore& digitStore,
7ec3b9cf 407 const AliMUONTrackParam& trackParam,
fda59e58 408 Bool_t isMatch[2], Int_t iChamber) const
7771752e 409{
410 //
683cb6c5 411 /// Given the tracker track position, searches for matching digits.
7771752e 412 //
413
414 Float_t minMatchDist[2];
415
7ec3b9cf 416 for(Int_t cath=0; cath<2; ++cath)
417 {
418 isMatch[cath]=kFALSE;
683cb6c5 419 minMatchDist[cath]=fkMaxDistance/10.;
7771752e 420 }
421
7ec3b9cf 422 TIter next(digitStore.CreateIterator());
423 AliMUONVDigit* mDigit;
fda59e58 424
7ec3b9cf 425 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
426 {
427 Int_t currDetElemId = mDigit->DetElemId();
fda59e58 428 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
429 if(currCh!=iChamber) continue;
7ec3b9cf 430 Int_t cathode = mDigit->Cathode();
431 Int_t ix = mDigit->PadX();
432 Int_t iy = mDigit->PadY();
433 Float_t xpad, ypad, zpad;
434 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
435 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
436
168e9c4d 437 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
7ec3b9cf 438 Float_t xlocal1 = pad.Position().X();
439 Float_t ylocal1 = pad.Position().Y();
440 Float_t dpx = pad.Dimensions().X();
441 Float_t dpy = pad.Dimensions().Y();
9b1e069f 442 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
7ec3b9cf 443 Float_t matchDist = MinDistanceFromPad(xpad, ypad, zpad, dpx, dpy, trackParam);
444 if(matchDist>minMatchDist[cathode])continue;
445 isMatch[cathode] = kTRUE;
fda59e58 446 if(isMatch[0] && isMatch[1]) break;
7ec3b9cf 447 minMatchDist[cathode] = matchDist;
7771752e 448 }
7771752e 449}
450
451
452//______________________________________________________________________________
7ec3b9cf 453Float_t
454AliMUONTrackHitPattern::MinDistanceFromPad(Float_t xPad, Float_t yPad, Float_t zPad,
455 Float_t dpx, Float_t dpy,
456 const AliMUONTrackParam& trackParam) const
7771752e 457{
458 //
683cb6c5 459 /// Decides if the digit belongs to the tracker track.
7771752e 460 //
7771752e 461
fda59e58 462 AliMUONTrackParam trackParamAtPadZ(trackParam);
463 AliMUONTrackExtrap::ExtrapToZCov(&trackParamAtPadZ, zPad);
464
465 Float_t xTrackAtPad = trackParamAtPadZ.GetNonBendingCoor();
466 Float_t yTrackAtPad = trackParamAtPadZ.GetBendingCoor();
7771752e 467
a0dc65b4 468 const Float_t kNSigma = GetRecoParam()->GetSigmaCutForTrigger();
fda59e58 469
470 const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
471
472 Float_t sigmaX = TMath::Sqrt(kCovParam(0,0));
473 Float_t sigmaY = TMath::Sqrt(kCovParam(2,2));
474
475 Float_t maxDistX = kNSigma * sigmaX; // in cm
476 Float_t maxDistY = kNSigma * sigmaY; // in cm
7771752e 477
478 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
479 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
480
683cb6c5 481 Float_t matchDist = fkMaxDistance;
7771752e 482 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
fda59e58 483
7771752e 484 return matchDist;
485}
486
487
683cb6c5 488//_____________________________________________________________________________
9b1e069f 489Int_t AliMUONTrackHitPattern::FindPadMatchingTrig(const AliMUONVDigitStore& digitStore, Int_t &detElemId,
683cb6c5 490 Float_t coor[2], Bool_t isMatch[2],
491 TArrayI nboard[2], TArrayF &zRealMatch, Float_t y11) const
492{
493 //
494 /// Check slat and board number of digit matching trigger track
495 //
496
497 enum {kBending, kNonBending};
498
499 Float_t minMatchDist[fgkNcathodes];
500 Int_t padsInCheckArea[fgkNcathodes];
501
502 for(Int_t cath=0; cath<fgkNcathodes; cath++){
503 isMatch[cath] = kFALSE;
504 minMatchDist[cath] = fkMaxDistance/10.;
505 padsInCheckArea[cath] = 0;
506 }
507 Int_t iChamber = AliMpDEManager::GetChamberId(detElemId);
508 Int_t ch = iChamber-10;
509 Float_t oldDeltaZ = AliMUONConstants::DefaultChamberZ(iChamber) - AliMUONConstants::DefaultChamberZ(10);
510 Float_t y = coor[1];
511 Int_t iSlat = detElemId%100;
512 Int_t trigDigitBendPlane = -1;
513 Int_t foundDetElemId = detElemId;
514 Float_t foundZmatch=999.;
515 Float_t yCoorAtPadZ=999.;
516
517 TIter next(digitStore.CreateIterator());
518 AliMUONVDigit* mDigit;
519 Int_t idigit=0;
520
521 while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
522 {
523 idigit++;
524 Int_t currDetElemId = mDigit->DetElemId();
525 Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
526 if(currCh!=iChamber) continue;
527 Int_t currSlat = currDetElemId%100;
528 Int_t slatDiff = TMath::Abs(currSlat-iSlat);
529 if(slatDiff>1 && slatDiff<17) continue; // Check neighbour slats
530 Int_t cathode = mDigit->Cathode();
531 Int_t ix = mDigit->PadX();
532 Int_t iy = mDigit->PadY();
533 Float_t xpad, ypad, zpad;
534 const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
535 ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
536
168e9c4d 537 AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
683cb6c5 538 Float_t xlocal1 = pad.Position().X();
539 Float_t ylocal1 = pad.Position().Y();
540 Float_t dpx = pad.Dimensions().X();
541 Float_t dpy = pad.Dimensions().Y();
9b1e069f 542 fkTransformer.Local2Global(currDetElemId, xlocal1, ylocal1, 0, xpad, ypad, zpad);
b5270f21 543 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 544 // searching track intersection with chambers (second approximation)
545 if(ch%2==1){
546 //if(iChamber%2==1){
547 Float_t deltaZ = zpad - zRealMatch[0];
548 y = (coor[1]-y11)*deltaZ/oldDeltaZ + y11;
549 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));
550 }
551 Float_t matchDist = PadMatchTrack(xpad, ypad, dpx, dpy, coor[0], y);
552 if(matchDist<fkMaxDistance/2.) padsInCheckArea[cathode]++;
553 if(matchDist>minMatchDist[cathode])continue;
554 isMatch[cathode] = kTRUE;
555 minMatchDist[cathode] = matchDist;
556 foundDetElemId = currDetElemId;
557 foundZmatch=zpad;
558 yCoorAtPadZ=y;
559 if(cathode==kBending) trigDigitBendPlane = idigit;
560 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
168e9c4d 561 nboard[cathode][loc] = pad.GetLocalBoardId(loc);
683cb6c5 562 }
563 for(Int_t loc=pad.GetNofLocations(); loc<fgkNlocations; loc++){
564 nboard[cathode][loc]=-1;
565 }
683cb6c5 566 }
567
568 for(Int_t cath=0; cath<fgkNcathodes; cath++){
569 if(padsInCheckArea[cath]>2) {
570 AliDebug(1, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
571 return -500;
572 }
573 }
574
575 if(isMatch[kBending] || isMatch[kNonBending]){
576 detElemId = foundDetElemId;
577 zRealMatch[ch] = foundZmatch;
578 coor[1] = yCoorAtPadZ;
579 }
580 return trigDigitBendPlane;
581}
582
583//_____________________________________________________________________________
584Float_t AliMUONTrackHitPattern::PadMatchTrack(Float_t xPad, Float_t yPad,
585 Float_t dpx, Float_t dpy,
586 Float_t xTrackAtPad, Float_t yTrackAtPad) const
587{
588 //
589 /// Decides if the digit belongs to the trigger track.
590 //
591
a0dc65b4 592 Float_t maxDist = GetRecoParam()->GetStripCutForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
b5270f21 593 if(maxDist<2.) maxDist = 2.;
a0dc65b4 594 Float_t maxDistCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * 2. * TMath::Min(dpx,dpy); // cm
683cb6c5 595
596 Float_t matchDist = fkMaxDistance;
597
598 Float_t deltaX = TMath::Abs(xPad-xTrackAtPad)-dpx;
599 Float_t deltaY = TMath::Abs(yPad-yTrackAtPad)-dpy;
600 Float_t maxDistX = maxDist;
601 Float_t maxDistY = maxDist;
602
603 if(deltaX<=maxDistX && deltaY<=maxDistY) matchDist = TMath::Max(deltaX, deltaY);
604 else if(deltaX<=maxDistCheckArea && deltaY<=maxDistCheckArea) matchDist = fkMaxDistance/5.;
605 return matchDist;
606}
607
608
609//_____________________________________________________________________________
610Int_t AliMUONTrackHitPattern::DetElemIdFromPos(Float_t x, Float_t y,
611 Int_t chamber, Int_t cathode) const
612{
613 //
614 /// Given the (x,y) position in the chamber,
615 /// it returns the corresponding slat
616 //
617
618 Int_t resultingDetElemId = -1;
619 AliMpDEIterator it;
620 Float_t minDist = 999.;
621 for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
622 Int_t detElemId = it.CurrentDEId();
623 Int_t ich = detElemId/100-10;
624 Float_t tolerance=0.2*((Float_t)ich);
625 Float_t currDist=9999.;
626
627 const AliMpVSegmentation* seg =
628 AliMpSegmentation::Instance()
629 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
630 if (!seg) continue;
631
632 Float_t deltax = seg->Dimensions().X();
633 Float_t deltay = seg->Dimensions().Y();
634 Float_t xlocal1 = -deltax;
635 Float_t ylocal1 = -deltay;
636 Float_t xlocal2 = +deltax;
637 Float_t ylocal2 = +deltay;
638 Float_t xg01, yg01, zg1, xg02, yg02, zg2;
9b1e069f 639 fkTransformer.Local2Global(detElemId, xlocal1, ylocal1, 0, xg01, yg01, zg1);
640 fkTransformer.Local2Global(detElemId, xlocal2, ylocal2, 0, xg02, yg02, zg2);
683cb6c5 641
642 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
643
644 if(xg01>xg02){
645 xg1 = xg02;
646 xg2 = xg01;
647 }
648 if(yg01>yg02){
649 yg1 = yg02;
650 yg2 = yg01;
651 }
652
653 if(x>=xg1-tolerance && x<=xg2+tolerance && y>=yg1-tolerance && y<=yg2+tolerance){ // takes into account errors in extrapolation
654 if(y<yg1) currDist = yg1-y;
655 else if(y>yg2) currDist = y-yg2;
656 if(currDist<minDist) {
657 resultingDetElemId = detElemId;
658 minDist=currDist;
659 continue;
660 }
661 resultingDetElemId = detElemId;
662 break;
663 }
664 } // loop on detElemId
665 return resultingDetElemId;
666}
667
668
669//_____________________________________________________________________________
670void AliMUONTrackHitPattern::LocalBoardFromPos(Float_t x, Float_t y,
671 Int_t detElemId, Int_t cathode,
672 Int_t localBoard[4]) const
673{
674 //
675 /// Given the (x,y) position in the chamber,
676 /// it returns the corresponding local board
677 //
678
679 for(Int_t loc=0; loc<fgkNlocations; loc++){
680 localBoard[loc]=-1;
681 }
682 Float_t xl, yl, zl;
9b1e069f 683 fkTransformer.Global2Local(detElemId, x, y, 0, xl, yl, zl);
683cb6c5 684 TVector2 pos(xl,yl);
685 const AliMpVSegmentation* seg =
686 AliMpSegmentation::Instance()
687 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
688 if (seg){
689 AliMpPad pad = seg->PadByPosition(pos,kFALSE);
690 for (Int_t loc=0; loc<pad.GetNofLocations(); loc++){
168e9c4d 691 localBoard[loc] = pad.GetLocalBoardId(loc);
683cb6c5 692 }
693 }
694}
695
696
697//_____________________________________________________________________________
698Bool_t AliMUONTrackHitPattern::PerformTrigTrackMatch(UShort_t &pattern,
9b1e069f 699 const AliMUONTriggerTrack* matchedTrigTrack,
683cb6c5 700 AliMUONVDigitStore& digitStore) const
7771752e 701{
fda59e58 702 //
683cb6c5 703 /// It searches for matching digits around the trigger track.
fda59e58 704 //
7771752e 705
683cb6c5 706 enum {kBending, kNonBending};
7771752e 707
683cb6c5 708 Int_t chOrder[fgkNchambers] = {0,2,1,3};
709
710 TArrayF zRealMatch(fgkNchambers);
711 TArrayF correctFactor(fgkNcathodes);
712
713 Bool_t isMatch[fgkNcathodes];
714 for(Int_t cath=0; cath<fgkNcathodes; cath++){
715 isMatch[cath] = kFALSE;
716 }
717
718 TArrayF zMeanChamber(fgkNchambers);
719 for(Int_t ch=0; ch<fgkNchambers; ch++){
720 zMeanChamber[ch] = AliMUONConstants::DefaultChamberZ(10+ch);
721 }
722
723 TArrayI digitPerTrack(fgkNcathodes);
724
725 Float_t trackIntersectCh[fgkNchambers][fgkNcathodes];
726
727 TArrayI triggeredDigits;
728 triggeredDigits.Set(fgkNchambers);
729 triggeredDigits.Reset(-1);
730
731 TArrayI trigScheme[fgkNcathodes];
732 TArrayI slatThatTriggered[fgkNcathodes];
733 for(Int_t cath=0; cath<fgkNcathodes; cath++){
734 trigScheme[cath].Set(fgkNchambers);
735 slatThatTriggered[cath].Set(fgkNchambers);
736 }
737
738 Int_t boardThatTriggered[fgkNchambers][fgkNcathodes][fgkNlocations];
739 TArrayI nboard[fgkNcathodes];
740 for(Int_t cath=0; cath<fgkNcathodes; cath++){
741 nboard[cath].Set(fgkNlocations);
742 }
743 Int_t ineffBoard[fgkNlocations];
744 for(Int_t loc=0; loc<fgkNlocations; loc++){
745 ineffBoard[loc] = -1;
746 }
747
748 digitPerTrack.Reset();
749 for(Int_t ch=0; ch<fgkNchambers; ch++){
750 zRealMatch[ch] = zMeanChamber[ch];
751 for(Int_t cath=0; cath<fgkNcathodes; cath++){
752 for(Int_t loc=0; loc<fgkNlocations; loc++){
753 boardThatTriggered[ch][cath][loc]=-1;
754 }
755 }
756 }
757
758 for(Int_t cath=0; cath<fgkNcathodes; cath++){
759 slatThatTriggered[cath].Reset(-1);
760 trigScheme[cath].Reset();
761 }
762
763 Bool_t isClearEvent = kTRUE;
764
765 //Float_t x11 = matchedTrigTrack->GetX11();// x position (info from non-bending plane)
766 Float_t y11 = matchedTrigTrack->GetY11();// y position (info from bending plane)
767 Float_t thetaX = matchedTrigTrack->GetThetax();
768 Float_t thetaY = matchedTrigTrack->GetThetay();
769
770 for(Int_t ch=0; ch<fgkNchambers; ch++) { // chamber loop
771 Int_t currCh = chOrder[ch];
b5270f21 772 AliDebug(3, Form("zMeanChamber[%i] = %.2f\tzRealMatch[0] = %.2f\n",currCh,zMeanChamber[currCh],zRealMatch[0]));
683cb6c5 773
774 for(Int_t cath=0; cath<fgkNcathodes; cath++){
775 correctFactor[cath]=1.;
776 }
777 // calculate corrections to trigger track theta
778 if(ch>=1) correctFactor[kNonBending] = zMeanChamber[0]/zRealMatch[0];// corrects x position
779 if(ch>=2) correctFactor[kBending] = (zMeanChamber[2] - zMeanChamber[0]) / (zRealMatch[2] - zRealMatch[0]);// corrects y position
780
781 // searching track intersection with chambers (first approximation)
782 Float_t deltaZ = zMeanChamber[currCh] - zMeanChamber[0];
783 trackIntersectCh[currCh][0] = zMeanChamber[currCh] * TMath::Tan(thetaX) * correctFactor[kNonBending];// x position (info from non-bending plane)
784 trackIntersectCh[currCh][1] = y11 + deltaZ * TMath::Tan(thetaY) * correctFactor[kBending];// y position (info from bending plane)
785 Int_t detElemIdFromTrack = DetElemIdFromPos(trackIntersectCh[currCh][0], trackIntersectCh[currCh][1], 11+currCh, 0);
786 if(detElemIdFromTrack<0) {
787 AliDebug(1, "Warning: trigger track outside trigger chamber\n");
788 continue;
789 }
790
791 triggeredDigits[currCh] = FindPadMatchingTrig(digitStore, detElemIdFromTrack, trackIntersectCh[currCh], isMatch, nboard, zRealMatch, y11);
792
793 // if FindPadMatchingTrig = -500 => too many digits matching pad =>
794 // => Event not clear => Reject track
795 if(triggeredDigits[currCh]<-100){
796 isClearEvent = kFALSE;
797 AliDebug(1, Form("Warning: track = %p (%i) matches many pads. Rejected!\n",(void *)matchedTrigTrack, detElemIdFromTrack));
798 break;
799 }
800
801 for(Int_t cath=0; cath<fgkNcathodes; cath++){
802 if(!isMatch[cath]) continue;
803 SetBit(pattern, cath, currCh);
804 digitPerTrack[cath]++;
805 trigScheme[cath][currCh]++;
806 slatThatTriggered[cath][currCh] = detElemIdFromTrack;
807 for(Int_t loc=0; loc<fgkNlocations; loc++){
808 boardThatTriggered[currCh][cath][loc] = nboard[cath][loc];
809 }
810 }
811 } // end chamber loop
812
813 for(Int_t cath=0; cath<fgkNcathodes; cath++){
814 if(digitPerTrack[cath]<3) isClearEvent = kFALSE;
815 if(!isClearEvent) AliDebug(1, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
816 }
817
818 if(!isClearEvent) return kFALSE;
819
820 Int_t goodForEff = kBoardEff;
821
822 Int_t ineffSlat = -1;
823 Int_t ineffDetElId = -1;
824 Int_t firstSlat = slatThatTriggered[kBending][0]%100;
825 if(firstSlat<0) firstSlat = slatThatTriggered[kBending][1]%100;
826 Int_t firstBoard = boardThatTriggered[0][kBending][0];
827 if(firstBoard<0) firstBoard = boardThatTriggered[1][kBending][0];
828 for(Int_t ch=0; ch<fgkNchambers; ch++){
829 Bool_t isCurrChIneff = kFALSE;
830 Int_t currSlat = slatThatTriggered[kBending][ch]%100;
831 if(currSlat<0){
832 ineffDetElId = DetElemIdFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], 11+ch, kBending);
833 currSlat = ineffDetElId%100;
834 ineffSlat = currSlat;
835 isCurrChIneff = kTRUE;
836 }
837 if(currSlat!=firstSlat) {
838 AddEffInfo(pattern, 20, kChEff);
839 return kTRUE;
840 }
841 Bool_t atLeastOneLoc=kFALSE;
842 if(isCurrChIneff) LocalBoardFromPos(trackIntersectCh[ch][0], trackIntersectCh[ch][1], ineffDetElId, kBending, ineffBoard);
843 for(Int_t loc=0; loc<fgkNlocations; loc++){
844 Int_t currBoard = boardThatTriggered[ch][kBending][loc];
845 if(isCurrChIneff) currBoard = ineffBoard[loc];
846 if(currBoard==firstBoard){
847 atLeastOneLoc=kTRUE;
848 break;
849 }
850 }
851 if(!atLeastOneLoc) goodForEff = kSlatEff;
852 } // end chamber loop
853
854 AddEffInfo(pattern, firstSlat, goodForEff);
855 return kTRUE;
7771752e 856}