1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 #include <stdlib.h> // for exit()
19 #include <Riostream.h>
20 #include <TClonesArray.h>
24 #include "AliMUONTrackK.h"
25 #include "AliCallf77.h"
27 #include "AliMUONChamber.h"
28 #include "AliMUONTrackReconstructor.h"
30 #include "AliMUONSegment.h"
31 #include "AliMUONHitForRec.h"
32 #include "AliMUONRawCluster.h"
33 #include "AliMUONTrackParam.h"
37 const Int_t AliMUONTrackK::fgkSize = 5;
38 const Int_t AliMUONTrackK::fgkNSigma = 12;
39 const Double_t AliMUONTrackK::fgkChi2max = 100;
40 const Int_t AliMUONTrackK::fgkTriesMax = 10000;
41 const Double_t AliMUONTrackK::fgkEpsilon = 0.002;
43 void mnvertLocal(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail); // from AliMUONTrack
44 //void mnvertLocalK(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail);
46 ClassImp(AliMUONTrackK) // Class implementation in ROOT context
48 Int_t AliMUONTrackK::fgDebug = -1;
49 Int_t AliMUONTrackK::fgNOfPoints = 0;
50 AliMUON* AliMUONTrackK::fgMUON = NULL;
51 AliMUONTrackReconstructor* AliMUONTrackK::fgTrackReconstructor = NULL;
52 TClonesArray* AliMUONTrackK::fgHitForRec = NULL;
53 //FILE *lun1 = fopen("window.dat","w");
55 //__________________________________________________________________________
56 AliMUONTrackK::AliMUONTrackK()
60 // Default constructor
62 fgTrackReconstructor = NULL; // pointer to event reconstructor
63 fgMUON = NULL; // pointer to Muon module
64 fgHitForRec = NULL; // pointer to points
65 fgNOfPoints = 0; // number of points
70 fTrackPar = fTrackParNew = NULL;
71 fCovariance = fWeight = NULL;
73 fParExtrap = fParFilter = fParSmooth = NULL;
74 fCovExtrap = fCovFilter = NULL;
76 fSteps = NULL; fNSteps = 0;
83 //__________________________________________________________________________
84 AliMUONTrackK::AliMUONTrackK(AliMUONTrackReconstructor *TrackReconstructor, TClonesArray *hitForRec)
90 if (!TrackReconstructor) return;
91 fgTrackReconstructor = TrackReconstructor; // pointer to event reconstructor
92 fgMUON = (AliMUON*) gAlice->GetModule("MUON"); // pointer to Muon module
93 fgHitForRec = hitForRec; // pointer to points
94 fgNOfPoints = fgHitForRec->GetEntriesFast(); // number of points
100 fTrackPar = fTrackParNew = NULL;
101 fCovariance = fWeight = NULL;
103 fParExtrap = fParFilter = fParSmooth = NULL;
104 fCovExtrap = fCovFilter = NULL;
106 fSteps = NULL; fNSteps = 0;
111 //__________________________________________________________________________
112 AliMUONTrackK::AliMUONTrackK(AliMUONSegment *segment)
114 : AliMUONTrack(segment, segment, fgTrackReconstructor)
116 // Constructor from a segment
118 AliMUONHitForRec *hit1, *hit2;
119 AliMUONRawCluster *clus;
120 TClonesArray *rawclusters;
122 fStartSegment = segment;
125 // Pointers to hits from the segment
126 hit1 = segment->GetHitForRec1();
127 hit2 = segment->GetHitForRec2();
128 hit1->SetNTrackHits(hit1->GetNTrackHits()+1); // mark hit as being on track
129 hit2->SetNTrackHits(hit2->GetNTrackHits()+1); // mark hit as being on track
130 // check sorting in Z
131 if (TMath::Abs(hit1->GetZ()) > TMath::Abs(hit2->GetZ())) {
133 hit2 = segment->GetHitForRec1();
135 // memory allocation for the TObjArray of pointers to reconstructed TrackHit's
136 fTrackHitsPtr = new TObjArray(13);
140 fTrackPar = new TMatrixD(fgkSize,1); // track parameters
141 fTrackParNew = new TMatrixD(fgkSize,1); // track parameters
142 fCovariance = new TMatrixD(fgkSize,fgkSize); // covariance matrix
143 fWeight = new TMatrixD(fgkSize,fgkSize); // weight matrix (inverse of covariance)
145 // Fill array of track parameters
146 if (hit1->GetChamberNumber() > 7) {
147 // last tracking station
148 (*fTrackPar)(0,0) = hit1->GetBendingCoor(); // y
149 (*fTrackPar)(1,0) = hit1->GetNonBendingCoor(); // x
150 fPosition = hit1->GetZ(); // z
151 fTrackHitsPtr->Add(hit2); // add hit 2
152 fTrackHitsPtr->Add(hit1); // add hit 1
153 //AZ(Z->-Z) fTrackDir = -1;
156 // last but one tracking station
157 (*fTrackPar)(0,0) = hit2->GetBendingCoor(); // y
158 (*fTrackPar)(1,0) = hit2->GetNonBendingCoor(); // x
159 fPosition = hit2->GetZ(); // z
160 fTrackHitsPtr->Add(hit1); // add hit 1
161 fTrackHitsPtr->Add(hit2); // add hit 2
162 //AZ(Z->-Z) fTrackDir = 1;
165 dZ = hit2->GetZ() - hit1->GetZ();
166 dY = hit2->GetBendingCoor() - hit1->GetBendingCoor();
167 dX = hit2->GetNonBendingCoor() - hit1->GetNonBendingCoor();
168 (*fTrackPar)(2,0) = TMath::ATan2(dY,dZ); // alpha
169 if ((*fTrackPar)(2,0) < 0.) (*fTrackPar)(2,0) += 2*TMath::Pi(); // from 0 to 2*pi
170 (*fTrackPar)(3,0) = TMath::ATan2(-dX,dZ/TMath::Cos((*fTrackPar)(2,0))); // beta
171 (*fTrackPar)(2,0) -= TMath::Pi();
172 (*fTrackPar)(4,0) = 1/fgTrackReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()); // 1/Pt
173 (*fTrackPar)(4,0) *= TMath::Cos((*fTrackPar)(3,0)); // 1/p
174 // Evaluate covariance (and weight) matrix
178 fParExtrap = new TObjArray(15);
179 fParFilter = new TObjArray(15);
180 fCovExtrap = new TObjArray(15);
181 fCovFilter = new TObjArray(15);
182 fJacob = new TObjArray(15);
183 fSteps = new TArrayD(15);
185 fChi2Array = new TArrayD(13);
189 if (fgDebug < 0 ) return;
190 cout << fgTrackReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()) << " " << 1/(*fTrackPar)(4,0) << " ";
191 if (fgTrackReconstructor->GetRecTrackRefHits()) {
192 // from track ref. hits
193 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetTTRTrack() << "<-->" << ((AliMUONHitForRec*)((*fTrackHitsPtr)[1]))->GetTTRTrack() << " @ " << fStartSegment->GetHitForRec1()->GetChamberNumber() << endl;
196 for (Int_t i=0; i<2; i++) {
197 hit1 = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
198 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit1->GetChamberNumber());
199 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit1->GetHitNumber());
200 cout << clus->GetTrack(1);
201 if (clus->GetTrack(2) != -1) cout << " " << clus->GetTrack(2);
202 if (i == 0) cout << " <--> ";
204 cout << " @ " << fStartSegment->GetHitForRec1()->GetChamberNumber() << endl;
208 //__________________________________________________________________________
209 AliMUONTrackK::~AliMUONTrackK()
214 delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's
215 fTrackHitsPtr = NULL;
218 delete fTrackPar; delete fTrackParNew; delete fCovariance;
222 if (fSteps) delete fSteps;
223 if (fChi2Array) delete fChi2Array;
224 if (fChi2Smooth) delete fChi2Smooth;
225 if (fParSmooth) {fParSmooth->Delete(); delete fParSmooth; }
226 // Delete only matrices not shared by several tracks
227 if (!fParExtrap) return;
230 for (Int_t i=0; i<fNSteps; i++) {
231 //if (fParExtrap->UncheckedAt(i)->GetUniqueID() > 1)
232 // fParExtrap->UncheckedAt(i)->SetUniqueID(fParExtrap->RemoveAt(i)->GetUniqueID()-1);
233 id = fParExtrap->UncheckedAt(i)->GetUniqueID();
235 fParExtrap->UncheckedAt(i)->SetUniqueID(id-1);
236 fParExtrap->RemoveAt(i);
238 //if (fParFilter->UncheckedAt(i)->GetUniqueID() > 1)
239 // fParFilter->UncheckedAt(i)->SetUniqueID(fParFilter->RemoveAt(i)->GetUniqueID()-1);
240 id = fParFilter->UncheckedAt(i)->GetUniqueID();
242 fParFilter->UncheckedAt(i)->SetUniqueID(id-1);
243 fParFilter->RemoveAt(i);
245 //if (fCovExtrap->UncheckedAt(i)->GetUniqueID() > 1)
246 // fCovExtrap->UncheckedAt(i)->SetUniqueID(fCovExtrap->RemoveAt(i)->GetUniqueID()-1);
247 id = fCovExtrap->UncheckedAt(i)->GetUniqueID();
249 fCovExtrap->UncheckedAt(i)->SetUniqueID(id-1);
250 fCovExtrap->RemoveAt(i);
253 //if (fCovFilter->UncheckedAt(i)->GetUniqueID() > 1)
254 // fCovFilter->UncheckedAt(i)->SetUniqueID(fCovFilter->RemoveAt(i)->GetUniqueID()-1);
255 id = fCovFilter->UncheckedAt(i)->GetUniqueID();
257 fCovFilter->UncheckedAt(i)->SetUniqueID(id-1);
258 fCovFilter->RemoveAt(i);
260 //if (fJacob->UncheckedAt(i)->GetUniqueID() > 1)
261 // fJacob->UncheckedAt(i)->SetUniqueID(fJacob->RemoveAt(i)->GetUniqueID()-1);
262 id = fJacob->UncheckedAt(i)->GetUniqueID();
264 fJacob->UncheckedAt(i)->SetUniqueID(id-1);
269 for (Int_t i=0; i<fNSteps; i++) {
270 if (fParExtrap->UncheckedAt(i)) ((TMatrixD*)fParExtrap->UncheckedAt(i))->Delete();
271 if (fParFilter->UncheckedAt(i)) ((TMatrixD*)fParFilter->UncheckedAt(i))->Delete();
272 if (fCovExtrap->UncheckedAt(i)) ((TMatrixD*)fCovExtrap->UncheckedAt(i))->Delete();
273 cout << fCovFilter->UncheckedAt(i) << " " << (*fSteps)[i] << endl;
274 if (fCovFilter->UncheckedAt(i)) ((TMatrixD*)fCovFilter->UncheckedAt(i))->Delete();
275 if (fJacob->UncheckedAt(i)) ((TMatrixD*)fJacob->UncheckedAt(i))->Delete();
278 fParExtrap->Delete(); fParFilter->Delete();
279 fCovExtrap->Delete(); fCovFilter->Delete();
281 delete fParExtrap; delete fParFilter;
282 delete fCovExtrap; delete fCovFilter;
286 //__________________________________________________________________________
287 AliMUONTrackK::AliMUONTrackK (const AliMUONTrackK& source)
288 //AZ: TObject(source)
289 : AliMUONTrack(source)
291 // Protected copy constructor
292 AliFatal("Not implemented.");
295 //__________________________________________________________________________
296 AliMUONTrackK & AliMUONTrackK::operator=(const AliMUONTrackK& source)
298 // Assignment operator
300 if(&source == this) return *this;
302 // base class assignement
303 //AZ TObject::operator=(source);
304 AliMUONTrack::operator=(source);
306 fStartSegment = source.fStartSegment;
307 fNTrackHits = source.fNTrackHits;
308 fChi2 = source.fChi2;
309 fPosition = source.fPosition;
310 fPositionNew = source.fPositionNew;
311 fTrackDir = source.fTrackDir;
312 fBPFlag = source.fBPFlag;
313 fRecover = source.fRecover;
314 fSkipHit = source.fSkipHit;
317 fTrackHitsPtr = new TObjArray(*source.fTrackHitsPtr);
318 //source.fTrackHitsPtr->Dump();
319 //fTrackHitsPtr->Dump();
321 fTrackPar = new TMatrixD(*source.fTrackPar); // track parameters
322 fTrackParNew = new TMatrixD(*source.fTrackParNew); // track parameters
323 fCovariance = new TMatrixD(*source.fCovariance); // covariance matrix
324 fWeight = new TMatrixD(*source.fWeight); // weight matrix (inverse of covariance)
327 fParExtrap = new TObjArray(*source.fParExtrap);
328 fParFilter = new TObjArray(*source.fParFilter);
329 fCovExtrap = new TObjArray(*source.fCovExtrap);
330 fCovFilter = new TObjArray(*source.fCovFilter);
331 fJacob = new TObjArray(*source.fJacob);
332 fSteps = new TArrayD(*source.fSteps);
333 fNSteps = source.fNSteps;
335 if (source.fChi2Array) fChi2Array = new TArrayD(*source.fChi2Array);
339 for (Int_t i=0; i<fParExtrap->GetEntriesFast(); i++) {
340 fParExtrap->UncheckedAt(i)->SetUniqueID(fParExtrap->UncheckedAt(i)->GetUniqueID()+1);
341 fParFilter->UncheckedAt(i)->SetUniqueID(fParFilter->UncheckedAt(i)->GetUniqueID()+1);
342 fCovExtrap->UncheckedAt(i)->SetUniqueID(fCovExtrap->UncheckedAt(i)->GetUniqueID()+1);
343 fCovFilter->UncheckedAt(i)->SetUniqueID(fCovFilter->UncheckedAt(i)->GetUniqueID()+1);
344 fJacob->UncheckedAt(i)->SetUniqueID(fJacob->UncheckedAt(i)->GetUniqueID()+1);
349 //__________________________________________________________________________
350 void AliMUONTrackK::EvalCovariance(Double_t dZ)
352 // Evaluate covariance (and weight) matrix for track candidate
353 Double_t sigmaB, sigmaNonB, tanA, tanB, dAdY, rad, dBdX, dBdY;
356 sigmaB = fgTrackReconstructor->GetBendingResolution(); // bending resolution
357 sigmaNonB = fgTrackReconstructor->GetNonBendingResolution(); // non-bending resolution
359 (*fWeight)(0,0) = sigmaB*sigmaB; // <yy>
361 (*fWeight)(1,1) = sigmaNonB*sigmaNonB; // <xx>
363 tanA = TMath::Tan((*fTrackPar)(2,0));
364 dAdY = 1/(1+tanA*tanA)/dZ;
365 (*fWeight)(2,2) = dAdY*dAdY*(*fWeight)(0,0)*2; // <aa>
366 (*fWeight)(0,2) = dAdY*(*fWeight)(0,0); // <ya>
367 (*fWeight)(2,0) = (*fWeight)(0,2);
369 rad = dZ/TMath::Cos((*fTrackPar)(2,0));
370 tanB = TMath::Tan((*fTrackPar)(3,0));
371 dBdX = 1/(1+tanB*tanB)/rad;
373 (*fWeight)(3,3) = dBdX*dBdX*(*fWeight)(1,1)*2; // <bb>
374 (*fWeight)(1,3) = dBdX*(*fWeight)(1,1); // <xb>
375 (*fWeight)(3,1) = (*fWeight)(1,3);
377 //(*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.2)*((*fTrackPar)(4,0)*0.2); // error 20%
378 (*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.5)*((*fTrackPar)(4,0)*0.5); // error 50%
380 // check whether the Invert method returns flag if matrix cannot be inverted,
381 // and do not calculate the Determinant in that case !!!!
382 if (fWeight->Determinant() != 0) {
383 // fWeight->Invert();
385 //mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
386 mnvertLocal(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
388 AliWarning(" Determinant fWeight=0:");
393 //__________________________________________________________________________
394 Bool_t AliMUONTrackK::KalmanFilter(Int_t ichamBeg, Int_t ichamEnd, Bool_t Back, Double_t zDipole1, Double_t zDipole2)
396 // Follows track through detector stations
397 Bool_t miss, success;
398 Int_t ichamb, iFB, iMin, iMax, dChamb, ichambOK;
399 Int_t ihit, firstIndx, lastIndx, currIndx;
400 Double_t zEnd, dChi2;
401 AliMUONHitForRec *hitAdd, *firstHit, *lastHit, *hit;
402 AliMUONRawCluster *clus;
403 TClonesArray *rawclusters;
404 hit = 0; clus = 0; rawclusters = 0;
406 miss = success = kTRUE;
408 iFB = (ichamEnd == ichamBeg) ? fTrackDir : TMath::Sign(1,ichamEnd-ichamBeg);
409 iMin = TMath::Min(ichamEnd,ichamBeg);
410 iMax = TMath::Max(ichamEnd,ichamBeg);
417 if (((AliMUONHitForRec*)fTrackHitsPtr->First())->GetChamberNumber() != ichamb) currIndx = 0;
418 } else if (fRecover) {
419 hit = GetHitLastOk();
420 currIndx = fTrackHitsPtr->IndexOf(hit);
421 if (currIndx < 0) hit = fStartSegment->GetHitForRec1(); // for station 3
423 ichamb = hit->GetChamberNumber();
424 if (hit == fSkipHit || fRecover == 2 && currIndx >= 0) {
425 // start from the last point or outlier
426 // remove the skipped hit
427 fTrackHitsPtr->Remove(fSkipHit); // remove hit
429 fSkipHit->SetNTrackHits(fSkipHit->GetNTrackHits()-1); // unmark hit
434 ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber();
435 //if (ichambOK >= 8 && ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber() == 6) ichambOK = 6;
436 currIndx = fgHitForRec->IndexOf(fSkipHit);
439 fTrackHitsPtr->Compress();
441 } // if (hit == fSkipHit)
442 else if (currIndx < 0) currIndx = fTrackHitsPtr->IndexOf(hit);
443 } // else if (fRecover)
445 // Get indices of the 1'st and last hits on the track candidate
446 firstHit = (AliMUONHitForRec*) fTrackHitsPtr->First();
447 lastHit = (AliMUONHitForRec*) fTrackHitsPtr->Last();
448 firstIndx = fgHitForRec->IndexOf(firstHit);
449 lastIndx = fgHitForRec->IndexOf(lastHit);
450 currIndx = TMath::Abs (TMath::Max(firstIndx*iFB,lastIndx*iFB));
453 while (ichamb>=iMin && ichamb<=iMax) {
454 // Find the closest hit in Z, not belonging to the current plane
457 if (currIndx < fNTrackHits) {
458 hitAdd = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(currIndx);
459 zEnd = hitAdd->GetZ();
460 //AZ(z->-z) } else zEnd = -9999;
463 //AZ(Z->-Z) zEnd = -9999;
465 for (ihit=currIndx+iFB; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
466 hitAdd = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
467 //if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.1) {
468 if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.5) {
469 zEnd = hitAdd->GetZ();
475 //AZ(Z->-Z) if (zEnd<-999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation
476 if (zEnd>999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation
478 // Check if there is a chamber without hits
479 if (zEnd>999 || TMath::Abs(hitAdd->GetChamberNumber()-ichamb) > 1) {
480 if (!Back && zEnd<999) currIndx -= iFB;
482 zEnd = (&(fgMUON->Chamber(ichamb)))->Z();
485 ichamb = hitAdd->GetChamberNumber();
489 if (ichamb<iMin || ichamb>iMax) break;
490 // Check for missing station
492 dChamb = TMath::Abs(ichamb-ichambOK);
493 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << endl;
494 Int_t dStatMiss = TMath::Abs (ichamb/2 - ichambOK/2);
495 if (zEnd > 999) dStatMiss++;
497 // missing station - abandon track
498 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl;
500 for (Int_t i1=0; i1<fgNOfPoints; i1++) {
501 cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " ";
502 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " ";
503 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " ";
504 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " ";
505 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTTRTrack() << endl;
508 cout << fNTrackHits << endl;
509 for (Int_t i1=0; i1<fNTrackHits; i1++) {
510 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
511 printf(" * %d %10.4f %10.4f %10.4f",
512 hit->GetChamberNumber(), hit->GetBendingCoor(),
513 hit->GetNonBendingCoor(), hit->GetZ());
514 if (fgTrackReconstructor->GetRecTrackRefHits()) {
515 // from track ref. hits
516 printf(" %3d %3d \n", hit->GetTrackRefSignal(), hit->GetTTRTrack());
519 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
520 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
521 printf("%3d", clus->GetTrack(1)-1);
522 if (clus->GetTrack(2) != 0) printf("%3d \n", clus->GetTrack(2)-1);
526 } // if (fgDebug >= 10)
527 if (fNTrackHits>2 && fRecover==0) Recover(); // try to recover track later
529 } // if (dStatMiss > 1)
531 if (endOfProp != 0) break;
533 // propagate to the found Z
535 // Check if track steps into dipole
536 //AZ(z->-z) if (fPosition>zDipole2 && zEnd<zDipole2) {
537 if (fPosition<zDipole2 && zEnd>zDipole2) {
538 //LinearPropagation(zDipole2-zBeg);
539 ParPropagation(zDipole2);
540 MSThin(1); // multiple scattering in the chamber
541 WeightPropagation(zDipole2, kTRUE); // propagate weight matrix
542 fPosition = fPositionNew;
543 *fTrackPar = *fTrackParNew;
544 //MagnetPropagation(zEnd);
545 ParPropagation(zEnd);
546 WeightPropagation(zEnd, kTRUE);
547 fPosition = fPositionNew;
549 // Check if track steps out of dipole
550 //AZ(z->-z) else if (fPosition>zDipole1 && zEnd<zDipole1) {
551 else if (fPosition<zDipole1 && zEnd>zDipole1) {
552 //MagnetPropagation(zDipole1-zBeg);
553 ParPropagation(zDipole1);
554 MSThin(1); // multiple scattering in the chamber
555 WeightPropagation(zDipole1, kTRUE);
556 fPosition = fPositionNew;
557 *fTrackPar = *fTrackParNew;
558 //LinearPropagation(zEnd-zDipole1);
559 ParPropagation(zEnd);
560 WeightPropagation(zEnd, kTRUE);
561 fPosition = fPositionNew;
563 ParPropagation(zEnd);
564 //MSThin(1); // multiple scattering in the chamber
565 if (TMath::Abs(zEnd-fPosition) > 5) MSThin(1); // multiple scattering in the chamber
566 WeightPropagation(zEnd, kTRUE);
567 fPosition = fPositionNew;
571 if (fRecover != 0 && hitAdd == fSkipHit && !miss) {
572 // recovered track - remove the hit
574 ichamb = fSkipHit->GetChamberNumber();
575 // remove the skipped hit
576 fTrackHitsPtr->Remove(fSkipHit);
578 fSkipHit->SetNTrackHits(fSkipHit->GetNTrackHits()-1); // unmark hit
581 ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber();
582 currIndx = fgHitForRec->IndexOf(fSkipHit);
586 // backward propagator
588 TMatrixD pointWeight(fgkSize,fgkSize);
589 TMatrixD point(fgkSize,1);
590 TMatrixD trackParTmp = point;
591 point(0,0) = hitAdd->GetBendingCoor();
592 point(1,0) = hitAdd->GetNonBendingCoor();
593 pointWeight(0,0) = 1/hitAdd->GetBendingReso2();
594 pointWeight(1,1) = 1/hitAdd->GetNonBendingReso2();
595 TryPoint(point,pointWeight,trackParTmp,dChi2);
596 *fTrackPar = trackParTmp;
597 *fWeight += pointWeight;
598 //AZ(z->-z) if (fTrackDir < 0) AddMatrices (this, dChi2, hitAdd);
599 if (fTrackDir > 0) AddMatrices (this, dChi2, hitAdd);
600 fChi2 += dChi2; // Chi2
601 } else *fTrackPar = *fTrackParNew; // adjust end point to the last hit
602 if (ichamb==ichamEnd) break;
605 // forward propagator
606 if (miss || !FindPoint(ichamb,zEnd,currIndx,iFB,hitAdd)) {
608 *fTrackPar = *fTrackParNew;
611 fTrackHitsPtr->Add(hitAdd); // add hit
613 hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()+1); // mark hit as being on track
615 currIndx = fgHitForRec->IndexOf(hitAdd); // Check
619 if (fgDebug > 0) cout << fNTrackHits << " " << fChi2 << " " << 1/(*fTrackPar)(4,0) << " " << fPosition << endl;
620 if (1/TMath::Abs((*fTrackPar)(4,0)) < fgTrackReconstructor->GetMinBendingMomentum()) success = kFALSE; // p < p_min
624 //__________________________________________________________________________
625 void AliMUONTrackK::ParPropagation(Double_t zEnd)
627 // Propagation of track parameters to zEnd
629 Double_t dZ, step, distance, charge;
630 Double_t vGeant3[7], vGeant3New[7];
631 AliMUONTrackParam trackParam;
634 // First step using linear extrapolation
635 dZ = zEnd - fPosition;
636 fPositionNew = fPosition;
637 *fTrackParNew = *fTrackPar;
638 if (dZ == 0) return; //AZ ???
639 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
640 step = dZ/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)); // linear estimate
641 //AZ(z->-z) charge = iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0));
642 charge = -iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0));
643 SetGeantParam(vGeant3,iFB);
644 //fTrackParNew->Print();
648 step = TMath::Abs(step);
649 // Propagate parameters
650 trackParam.ExtrapOneStepRungekutta(charge,step,vGeant3,vGeant3New);
651 //extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
652 distance = zEnd - vGeant3New[2];
653 step *= dZ/(vGeant3New[2]-fPositionNew);
655 } while (distance*iFB < 0 && TMath::Abs(distance) > fgkEpsilon);
657 GetFromGeantParam(vGeant3New,iFB);
658 //fTrackParNew->Print();
660 // Position adjustment (until within tolerance)
661 while (TMath::Abs(distance) > fgkEpsilon) {
662 dZ = zEnd - fPositionNew;
663 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
664 step = dZ/TMath::Cos((*fTrackParNew)(2,0))/TMath::Cos((*fTrackParNew)(3,0));
665 step = TMath::Abs(step);
666 SetGeantParam(vGeant3,iFB);
669 // Propagate parameters
670 trackParam.ExtrapOneStepRungekutta(charge,step,vGeant3,vGeant3New);
671 //extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
672 distance = zEnd - vGeant3New[2];
675 if (nTries > fgkTriesMax) {
676 cout << " ***** ParPropagation: too many tries " << nTries << endl;
677 AliFatal("Too many tries.");
679 } while (distance*iFB < 0);
681 GetFromGeantParam(vGeant3New,iFB);
683 //cout << nTries << endl;
684 //fTrackParNew->Print();
688 //__________________________________________________________________________
689 void AliMUONTrackK::WeightPropagation(void)
691 // Propagation of the weight matrix
692 // W = DtWD, where D is Jacobian
694 // !!! not implemented TMatrixD weight1(*fJacob,TMatrixD::kAtBA,*fWeight); // DtWD
695 TMatrixD weight1(*fWeight,TMatrixD::kMult,*fJacob); // WD
696 *fWeight = TMatrixD(*fJacob,TMatrixD::kTransposeMult,weight1); // DtWD
700 //__________________________________________________________________________
701 void AliMUONTrackK::WeightPropagation(Double_t zEnd, Bool_t smooth)
703 // Propagation of the weight matrix
704 // W = DtWD, where D is Jacobian
708 TMatrixD jacob(fgkSize,fgkSize);
711 // Save initial and propagated parameters
712 TMatrixD trackPar0 = *fTrackPar;
713 TMatrixD trackParNew0 = *fTrackParNew;
715 // Get covariance matrix
716 *fCovariance = *fWeight;
717 // check whether the Invert method returns flag if matrix cannot be inverted,
718 // and do not calculate the Determinant in that case !!!!
719 if (fCovariance->Determinant() != 0) {
720 // fCovariance->Invert();
722 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
723 //fCovariance->Print();
725 AliWarning(" Determinant fCovariance=0:");
728 // Loop over parameters to find change of the propagated vs initial ones
729 for (i=0; i<fgkSize; i++) {
730 dPar = TMath::Sqrt((*fCovariance)(i,i));
731 *fTrackPar = trackPar0;
732 if (i == 4) dPar *= TMath::Sign(1.,-trackPar0(4,0)); // 1/p
733 (*fTrackPar)(i,0) += dPar;
734 ParPropagation(zEnd);
735 for (j=0; j<fgkSize; j++) {
736 jacob(j,i) = ((*fTrackParNew)(j,0)-trackParNew0(j,0))/dPar;
740 //trackParNew0.Print();
741 //TMatrixD par1(jacob,TMatrixD::kMult,trackPar0); //
743 TMatrixD jacob0 = jacob;
744 if (jacob.Determinant() != 0) {
747 AliWarning(" Determinant jacob=0:");
749 TMatrixD weight1(*fWeight,TMatrixD::kMult,jacob); // WD
750 *fWeight = TMatrixD(jacob,TMatrixD::kTransposeMult,weight1); // DtWD
752 // Restore initial and propagated parameters
753 *fTrackPar = trackPar0;
754 *fTrackParNew = trackParNew0;
757 if (!smooth) return; // do not use smoother
758 //AZ(z->-z) if (fTrackDir > 0) return; // only for propagation towards int. point
759 if (fTrackDir < 0) return; // only for propagation towards int. point
760 TMatrixD *tmp = new TMatrixD(*fTrackParNew); // extrapolated parameters
761 fParExtrap->Add(tmp);
763 tmp = new TMatrixD(*fTrackParNew); // filtered parameters (if no measurement will be found)
764 fParFilter->Add(tmp);
766 *fCovariance = *fWeight;
767 if (fCovariance->Determinant() != 0) {
769 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
771 AliWarning(" Determinant fCovariance=0:");
773 tmp = new TMatrixD(*fCovariance); // extrapolated covariance
774 fCovExtrap->Add(tmp);
776 tmp = new TMatrixD(*fCovariance); // filtered covariance (if no measurement will be found)
777 fCovFilter->Add(tmp);
779 tmp = new TMatrixD(jacob0); // Jacobian
782 if (fSteps->fN <= fNSteps) fSteps->Set(fSteps->fN+10);
783 fSteps->AddAt(fPositionNew,fNSteps++);
784 if (fgDebug > 0) cout << " WeightPropagation " << fNSteps << " " << fPositionNew << endl;
788 //__________________________________________________________________________
789 Bool_t AliMUONTrackK::FindPoint(Int_t ichamb, Double_t zEnd, Int_t currIndx, Int_t iFB, AliMUONHitForRec *&hitAdd)
791 // Picks up point within a window for the chamber No ichamb
792 // Split the track if there are more than 1 hit
793 Int_t ihit, nRecTracks;
794 Double_t windowB, windowNonB, dChi2Tmp=0, dChi2, y, x, savePosition=0;
795 TClonesArray *trackPtr;
796 AliMUONHitForRec *hit, *hitLoop;
797 AliMUONTrackK *trackK;
800 //sigmaB = fgTrackReconstructor->GetBendingResolution(); // bending resolution
801 //sigmaNonB = fgTrackReconstructor->GetNonBendingResolution(); // non-bending resolution
802 *fCovariance = *fWeight;
803 // check whether the Invert method returns flag if matrix cannot be inverted,
804 // and do not calculate the Determinant in that case !!!!
805 if (fCovariance->Determinant() != 0) {
806 // fCovariance->Invert();
808 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
810 AliWarning(" Determinant fCovariance=0:");
812 //windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+sigmaB*sigmaB);
813 //windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+sigmaNonB*sigmaNonB);
814 // Loop over all hits and take hits from the chamber
815 TMatrixD pointWeight(fgkSize,fgkSize);
816 TMatrixD saveWeight = pointWeight;
817 TMatrixD pointWeightTmp = pointWeight;
818 TMatrixD point(fgkSize,1);
819 TMatrixD trackPar = point;
820 TMatrixD trackParTmp = point;
823 zLast = ((AliMUONHitForRec*)fTrackHitsPtr->Last())->GetZ();
825 for (ihit=currIndx; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
826 hit = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
827 if (hit->GetChamberNumber() == ichamb) {
828 //if (TMath::Abs(hit->GetZ()-zEnd) < 0.1) {
829 if (TMath::Abs(hit->GetZ()-zEnd) < 0.5) {
830 //if (TMath::Abs(hit->GetZ()-zEnd) > 0.1) {
831 if (TMath::Abs(hit->GetZ()-zEnd) > 0.05) {
832 // adjust position: for multiple hits in the chamber
833 // (mostly (only?) for GEANT hits)
834 cout << " ******* adjust " << zEnd << " " << hit->GetZ() << endl;
836 *fTrackPar = *fTrackParNew;
837 ParPropagation(zEnd);
838 WeightPropagation(zEnd, kTRUE);
839 fPosition = fPositionNew;
840 *fTrackPar = *fTrackParNew;
842 *fCovariance = *fWeight;
843 if (fCovariance->Determinant() != 0) {
845 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
847 AliWarning(" Determinant fCovariance=0:" );
850 y = hit->GetBendingCoor();
851 x = hit->GetNonBendingCoor();
852 windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
853 windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
855 // windowB = TMath::Min (windowB,5.);
856 if (fgkNSigma > 6) windowB = TMath::Min (windowB,5.);
858 if (TMath::Abs(hit->GetZ()-zLast) < 50) {
859 windowB = TMath::Min (windowB,0.5);
860 windowNonB = TMath::Min (windowNonB,3.);
861 } else if (TMath::Abs(hit->GetZ()-zLast) < 200) {
862 windowB = TMath::Min (windowB,1.5);
863 windowNonB = TMath::Min (windowNonB,3.);
864 } else if (TMath::Abs(hit->GetZ()-zLast) < 350) {
865 windowB = TMath::Min (windowB,4.);
866 windowNonB = TMath::Min (windowNonB,6.);
872 if (TMath::Abs(hit->GetZ()-zLast) < 50) {
873 windowB = 5*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
874 windowNonB = 5*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
876 windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
877 windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
881 //cout << TMath::Abs((*fTrackParNew)(0,0)-y) << " " << windowB << " " << TMath::Abs((*fTrackParNew)(1,0)-x) << " " << windowNonB << " " << zEnd << endl;
882 if (TMath::Abs((*fTrackParNew)(0,0)-y) <= windowB &&
883 TMath::Abs((*fTrackParNew)(1,0)-x) <= windowNonB) {
884 //if (TMath::Abs((*fTrackParNew)(0,0)-y) <= windowB &&
885 // TMath::Abs((*fTrackParNew)(1,0)-x) <= windowNonB &&
886 // hit->GetTrackRefSignal() == 1) { // just for test
887 // Vector of measurements and covariance matrix
888 //fprintf(lun1,"%3d %3d %10.4f %10.4f \n", gAlice->GetEvNumber(), ichamb, x, y);
892 pointWeight(0,0) = 1/hit->GetBendingReso2();
893 pointWeight(1,1) = 1/hit->GetNonBendingReso2();
894 TryPoint(point,pointWeight,trackPar,dChi2);
895 if (TMath::Abs(1./(trackPar)(4,0)) < fgTrackReconstructor->GetMinBendingMomentum()) continue; // p < p_min - next hit
898 //if (nHitsOK > -1) {
900 // Save current members
901 saveWeight = *fWeight;
902 savePosition = fPosition;
903 // temporary storage for the current track
905 trackParTmp = trackPar;
906 pointWeightTmp = pointWeight;
909 // branching: create a new track
910 trackPtr = fgTrackReconstructor->GetRecTracksPtr();
911 nRecTracks = fgTrackReconstructor->GetNRecTracks();
912 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
914 fgTrackReconstructor->SetNRecTracks(nRecTracks+1);
915 if (fgDebug > 0) cout << " ******** New track: " << ichamb << " " << hit->GetTTRTrack() << " " << 1/(trackPar)(4,0) << " " << hit->GetBendingCoor() << " " << hit->GetNonBendingCoor() << " " << fNTrackHits << " " << nRecTracks << endl;
916 trackK->fRecover = 0;
917 *(trackK->fTrackPar) = trackPar;
918 *(trackK->fWeight) += pointWeight;
919 trackK->fChi2 += dChi2;
922 *(trackK->fCovariance) = *(trackK->fWeight);
923 if (trackK->fCovariance->Determinant() != 0) {
925 mnvertLocal(&((*(trackK->fCovariance))(0,0)), fgkSize,fgkSize,fgkSize,ifail);
927 cout << (*(trackK->fCovariance))(0,0) << " " << (*(trackK->fCovariance))(1,1) << " " << (*fCovariance)(0,0) << " " << (*fCovariance)(1,1) << endl;
929 // Add filtered matrices for the smoother
930 //AZ(z->-z) if (fTrackDir < 0) {
932 if (nHitsOK > 2) { // check for position adjustment
933 for (Int_t i=trackK->fNSteps-1; i>=0; i--) {
934 if (TMath::Abs(hit->GetZ()-(*trackK->fSteps)[i]) > 0.1) {
935 //if (TMath::Abs(hit->GetZ()-(trackK->fSteps)[i]) > 0.1) {
936 RemoveMatrices(trackK);
937 cout << " *** Position adjustment 1 " << hit->GetZ() << " "
938 << (*trackK->fSteps)[i] << endl;
939 AliFatal(" Position adjustment 1.");
944 AddMatrices (trackK, dChi2, hit);
946 // Mark hits as being on 2 tracks
947 for (Int_t i=0; i<fNTrackHits; i++) {
948 hitLoop = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
949 hitLoop->SetNTrackHits(hitLoop->GetNTrackHits()+1);
952 cout << hitLoop->GetChamberNumber() << " ";
953 cout << hitLoop->GetBendingCoor() << " ";
954 cout << hitLoop->GetNonBendingCoor() << " ";
955 cout << hitLoop->GetZ() << " " << " ";
956 cout << hitLoop->GetTrackRefSignal() << " " << " ";
957 cout << hitLoop->GetTTRTrack() << endl;
958 printf(" ** %d %10.4f %10.4f %10.4f %d %d \n",
959 hitLoop->GetChamberNumber(), hitLoop->GetBendingCoor(),
960 hitLoop->GetNonBendingCoor(), hitLoop->GetZ(),
961 hitLoop->GetTrackRefSignal(), hitLoop->GetTTRTrack());
965 trackK->fTrackHitsPtr->Add(hit); // add hit
966 trackK->fNTrackHits ++;
967 hit->SetNTrackHits(hit->GetNTrackHits()+1); // mark hit as being on track
970 //AZ(z->-z) trackK->fTrackDir = -1;
971 trackK->fTrackDir = 1;
972 trackK->fBPFlag = kTRUE;
977 } else break; // different chamber
978 } // for (ihit=currIndx;
981 *fTrackPar = trackParTmp;
982 *fWeight = saveWeight;
983 *fWeight += pointWeightTmp;
984 fChi2 += dChi2Tmp; // Chi2
985 fPosition = savePosition;
986 // Add filtered matrices for the smoother
987 //AZ(z->-z) if (fTrackDir < 0) {
989 for (Int_t i=fNSteps-1; i>=0; i--) {
990 if (TMath::Abs(fPosition-(*fSteps)[i]) > 0.1) {
991 //if (TMath::Abs(fPosition-fSteps[i]) > 0.1) {
992 RemoveMatrices(this);
993 if (fgDebug > 0) cout << " *** Position adjustment 2 " << fPosition << " " << (*fSteps)[i] << endl;
996 } // for (Int_t i=fNSteps-1;
997 AddMatrices (this, dChi2Tmp, hitAdd);
1000 for (Int_t i=0; i<fNSteps; i++) cout << (*fSteps)[i] << " "; cout << endl;
1001 for (Int_t i=0; i<trackK->fNSteps; i++) cout << (*trackK->fSteps)[i] << " "; cout << endl;
1004 } // if (fTrackDir > 0)
1009 //__________________________________________________________________________
1010 void AliMUONTrackK::TryPoint(TMatrixD &point, const TMatrixD &pointWeight, TMatrixD &trackParTmp, Double_t &dChi2)
1012 // Adds a measurement point (modifies track parameters and computes
1015 // Solving linear system (W+U)p' = U(m-p) + (W+U)p
1016 TMatrixD wu = *fWeight;
1017 wu += pointWeight; // W+U
1018 trackParTmp = point;
1019 trackParTmp -= *fTrackParNew; // m-p
1020 TMatrixD right(pointWeight,TMatrixD::kMult,trackParTmp); // U(m-p)
1021 TMatrixD right1(wu,TMatrixD::kMult,*fTrackParNew); // (W+U)p
1022 right += right1; // U(m-p) + (W+U)p
1024 // check whether the Invert method returns flag if matrix cannot be inverted,
1025 // and do not calculate the Determinant in that case !!!!
1026 if (wu.Determinant() != 0) {
1029 mnvertLocal(&((wu)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1031 AliWarning(" Determinant wu=0:");
1033 trackParTmp = TMatrixD(wu,TMatrixD::kMult,right);
1035 right1 = trackParTmp;
1036 right1 -= point; // p'-m
1037 point = trackParTmp;
1038 point -= *fTrackParNew; // p'-p
1039 right = TMatrixD(*fWeight,TMatrixD::kMult,point); // W(p'-p)
1040 TMatrixD value(point,TMatrixD::kTransposeMult,right); // (p'-p)'W(p'-p)
1042 right = TMatrixD(pointWeight,TMatrixD::kMult,right1); // U(p'-m)
1043 value = TMatrixD(right1,TMatrixD::kTransposeMult,right); // (p'-m)'U(p'-m)
1044 dChi2 += value(0,0);
1048 //__________________________________________________________________________
1049 void AliMUONTrackK::MSThin(Int_t sign)
1051 // Adds multiple scattering in a thin layer (only angles are affected)
1052 Double_t cosAlph, cosBeta, momentum, velo, path, theta0;
1054 // check whether the Invert method returns flag if matrix cannot be inverted,
1055 // and do not calculate the Determinant in that case !!!!
1056 if (fWeight->Determinant() != 0) {
1057 //fWeight->Invert(); // covariance
1060 mnvertLocal(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1062 AliWarning(" Determinant fWeight=0:");
1065 cosAlph = TMath::Cos((*fTrackParNew)(2,0));
1066 cosBeta = TMath::Cos((*fTrackParNew)(3,0));
1067 momentum = 1/(*fTrackParNew)(4,0); // particle momentum
1068 //velo = momentum/TMath::Sqrt(momentum*momentum+muonMass*muonMass); // velocity/c for muon hypothesis
1069 velo = 1; // relativistic
1070 path = TMath::Abs(fgTrackReconstructor->GetChamberThicknessInX0()/cosAlph/cosBeta); // path length
1071 theta0 = 0.0136/velo/momentum*TMath::Sqrt(path)*(1+0.038*TMath::Log(path)); // projected scattering angle
1073 (*fWeight)(2,2) += sign*theta0/cosBeta*theta0/cosBeta; // alpha
1074 (*fWeight)(3,3) += sign*theta0*theta0; // beta
1075 //fWeight->Invert(); // weight
1078 mnvertLocal(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1082 //__________________________________________________________________________
1083 void AliMUONTrackK::StartBack(void)
1085 // Starts backpropagator
1089 for (Int_t i=0; i<fgkSize; i++) {
1090 for (Int_t j=0; j<fgkSize; j++) {
1091 if (j==i) (*fWeight)(i,i) /= 100;
1092 //if (j==i) (*fWeight)(i,i) /= fNTrackHits*fNTrackHits;
1093 else (*fWeight)(j,i) = 0;
1096 // Sort hits on track in descending order in abs(z)
1097 SortHits(0, fTrackHitsPtr);
1100 //__________________________________________________________________________
1101 void AliMUONTrackK::SortHits(Int_t iflag, TObjArray *array)
1103 // Sort hits in Z if the seed segment in the last but one station
1104 // (if iflag==0 in descending order in abs(z), if !=0 - unsort)
1106 if (iflag && ((AliMUONHitForRec*)(array->UncheckedAt(0)))->GetChamberNumber() == 6) return;
1107 Double_t z = 0, zmax = TMath::Abs(((AliMUONHitForRec*)(array->UncheckedAt(0)))->GetZ());
1108 Int_t i = 1, entries = array->GetEntriesFast();
1109 for ( ; i<entries; i++) {
1111 if (((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetChamberNumber() == 6) break;
1113 z = TMath::Abs(((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetZ());
1114 if (z < zmax) break;
1116 if (fgDebug >= 10) cout << " " << zmax << " " << z << " " << i << endl;
1120 for (Int_t j=0; j<=(i-1)/2; j++) {
1121 TObject *hit = array->UncheckedAt(j);
1122 array->AddAt(array->UncheckedAt(i-j),j);
1123 array->AddAt(hit,i-j);
1125 if (fgDebug >= 10) {
1126 for (i=0; i<entries; i++)
1127 cout << ((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetZ() << " ";
1128 cout << " - Sort" << endl;
1132 //__________________________________________________________________________
1133 void AliMUONTrackK::SetGeantParam(Double_t *VGeant3, Int_t iFB)
1135 // Set vector of Geant3 parameters pointed to by "VGeant3"
1136 // from track parameters
1138 VGeant3[0] = (*fTrackParNew)(1,0); // X
1139 VGeant3[1] = (*fTrackParNew)(0,0); // Y
1140 VGeant3[2] = fPositionNew; // Z
1141 VGeant3[3] = iFB*TMath::Sin((*fTrackParNew)(3,0)); // Px/Ptot
1142 VGeant3[4] = iFB*TMath::Cos((*fTrackParNew)(3,0))*TMath::Sin((*fTrackParNew)(2,0)); // Py/Ptot
1143 VGeant3[5] = iFB*TMath::Sqrt(1.0-VGeant3[3]*VGeant3[3]-VGeant3[4]*VGeant3[4]); // Pz/Ptot
1144 VGeant3[6] = 1/TMath::Abs((*fTrackParNew)(4,0)); // Ptot
1147 //__________________________________________________________________________
1148 void AliMUONTrackK::GetFromGeantParam(Double_t *VGeant3, Int_t iFB)
1150 // Get track parameters from vector of Geant3 parameters pointed
1153 fPositionNew = VGeant3[2]; // Z
1154 (*fTrackParNew)(0,0) = VGeant3[1]; // Y
1155 (*fTrackParNew)(1,0) = VGeant3[0]; // X
1156 (*fTrackParNew)(3,0) = TMath::ASin(iFB*VGeant3[3]); // beta
1157 (*fTrackParNew)(2,0) = TMath::ASin(iFB*VGeant3[4]/TMath::Cos((*fTrackParNew)(3,0))); // alpha
1158 (*fTrackParNew)(4,0) = 1/VGeant3[6]*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0)); // 1/Ptot
1161 //__________________________________________________________________________
1162 void AliMUONTrackK::SetTrackQuality(Int_t iChi2)
1164 // Computes "track quality" from Chi2 (if iChi2==0) or vice versa
1167 cout << " ***** Too high Chi2: " << fChi2 << endl;
1170 if (iChi2 == 0) fChi2 = fNTrackHits + (500.-fChi2)/501;
1171 else fChi2 = 500 - (fChi2-fNTrackHits)*501;
1174 //__________________________________________________________________________
1175 Int_t AliMUONTrackK::Compare(const TObject* trackK) const
1177 // "Compare" function to sort with decreasing "track quality".
1178 // Returns +1 (0, -1) if quality of current track
1179 // is smaller than (equal to, larger than) quality of trackK
1181 if (fChi2 < ((AliMUONTrackK*)trackK)->fChi2) return(+1);
1182 else if (fChi2 == ((AliMUONTrackK*)trackK)->fChi2) return(0);
1186 //__________________________________________________________________________
1187 Bool_t AliMUONTrackK::KeepTrack(AliMUONTrackK* track0) const
1189 // Check whether or not to keep current track
1190 // (keep, if it has less than half of common hits with track0)
1191 Int_t hitsInCommon, nHits0, i, j, nTrackHits2;
1192 AliMUONHitForRec *hit0, *hit1;
1195 nHits0 = track0->fNTrackHits;
1196 nTrackHits2 = fNTrackHits/2;
1198 for (i=0; i<nHits0; i++) {
1199 // Check if hit belongs to several tracks
1200 hit0 = (AliMUONHitForRec*) (*track0->fTrackHitsPtr)[i];
1201 if (hit0->GetNTrackHits() == 1) continue;
1202 for (j=0; j<fNTrackHits; j++) {
1203 hit1 = (AliMUONHitForRec*) (*fTrackHitsPtr)[j];
1204 if (hit1->GetNTrackHits() == 1) continue;
1207 if (hitsInCommon >= nTrackHits2) return kFALSE;
1215 //__________________________________________________________________________
1216 void AliMUONTrackK::Kill(void)
1218 // Kill track candidate
1220 AliMUONHitForRec *hit;
1222 if (fTrackHitsPtr) {
1223 // Remove track mark from hits
1224 for (i=0; i<fNTrackHits; i++) {
1225 hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[i];
1226 hit->SetNTrackHits(hit->GetNTrackHits()-1);
1229 fgTrackReconstructor->GetRecTracksPtr()->Remove(this);
1232 //__________________________________________________________________________
1233 void AliMUONTrackK::FillMUONTrack(void)
1235 // Compute track parameters at hit positions (as for AliMUONTrack)
1237 // Set number of hits per track
1238 ((AliMUONTrack*)this)->SetNTrackHits(fNTrackHits);
1240 // Set track parameters at vertex
1241 AliMUONTrackParam trackParam;
1242 SetTrackParam(&trackParam, fTrackPar, fPosition);
1243 ((AliMUONTrack*)this)->SetTrackParamAtVertex(&trackParam);
1245 // Set track parameters at hits
1246 for (Int_t i = fNTrackHits-1; i>=0; i--) {
1247 if ((*fChi2Smooth)[i] < 0) {
1248 // Propagate through last chambers
1249 trackParam.ExtrapToZ(((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetZ());
1252 SetTrackParam(&trackParam, (TMatrixD*)fParSmooth->UncheckedAt(i), ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetZ());
1254 ((AliMUONTrack*)this)->AddTrackParamAtHit(&trackParam);
1255 // Fill array of HitForRec's
1256 ((AliMUONTrack*)this)->AddHitForRecAtHit((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(i));
1260 //__________________________________________________________________________
1261 void AliMUONTrackK::SetTrackParam(AliMUONTrackParam *trackParam, TMatrixD *par, Double_t z)
1263 // Fill AliMUONTrackParam object
1265 trackParam->SetBendingCoor((*par)(0,0));
1266 trackParam->SetNonBendingCoor((*par)(1,0));
1267 trackParam->SetBendingSlope(TMath::Tan((*par)(2,0)));
1268 trackParam->SetNonBendingSlope(TMath::Tan((*par)(3,0))/TMath::Cos((*par)(2,0)));
1269 trackParam->SetInverseBendingMomentum((*par)(4,0)/TMath::Cos((*par)(3,0)));
1270 trackParam->SetZ(z);
1273 //__________________________________________________________________________
1274 void AliMUONTrackK::Branson(void)
1276 // Propagates track to the vertex thru absorber using Branson correction
1277 // (makes use of the AliMUONTrackParam class)
1279 //AliMUONTrackParam *trackParam = new AliMUONTrackParam();
1280 AliMUONTrackParam trackParam = AliMUONTrackParam();
1282 trackParam->SetBendingCoor((*fTrackPar)(0,0));
1283 trackParam->SetNonBendingCoor((*fTrackPar)(1,0));
1284 trackParam->SetBendingSlope(TMath::Tan((*fTrackPar)(2,0)));
1285 trackParam->SetNonBendingSlope(TMath::Tan((*fTrackPar)(3,0))/TMath::Cos((*fTrackPar)(2,0)));
1286 trackParam->SetInverseBendingMomentum((*fTrackPar)(4,0)/TMath::Cos((*fTrackPar)(3,0)));
1287 trackParam->SetZ(fPosition);
1289 SetTrackParam(&trackParam, fTrackPar, fPosition);
1291 trackParam.ExtrapToVertex(Double_t(0.), Double_t(0.), Double_t(0.));
1292 //trackParam.ExtrapToVertex();
1294 (*fTrackPar)(0,0) = trackParam.GetBendingCoor();
1295 (*fTrackPar)(1,0) = trackParam.GetNonBendingCoor();
1296 (*fTrackPar)(2,0) = TMath::ATan(trackParam.GetBendingSlope());
1297 (*fTrackPar)(3,0) = TMath::ATan(TMath::Cos((*fTrackPar)(2,0))*trackParam.GetNonBendingSlope());
1298 (*fTrackPar)(4,0) = TMath::Cos((*fTrackPar)(3,0))*trackParam.GetInverseBendingMomentum();
1299 fPosition = trackParam.GetZ();
1300 //delete trackParam;
1301 cout << 1/(*fTrackPar)(4,0) << " " << fPosition << " " << (*fTrackPar)(0,0) << endl;
1303 // Get covariance matrix
1304 *fCovariance = *fWeight;
1305 if (fCovariance->Determinant() != 0) {
1307 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1309 AliWarning(" Determinant fCovariance=0:");
1313 //__________________________________________________________________________
1314 void AliMUONTrackK::GoToZ(Double_t zEnd)
1316 // Propagates track to given Z
1318 ParPropagation(zEnd);
1319 MSThin(1); // multiple scattering in the chamber
1320 WeightPropagation(zEnd, kFALSE);
1321 fPosition = fPositionNew;
1322 *fTrackPar = *fTrackParNew;
1325 //__________________________________________________________________________
1326 void AliMUONTrackK::GoToVertex(Int_t iflag)
1329 // Propagates track to the vertex
1330 // All material constants are taken from AliRoot
1332 static Double_t x01[5] = { 24.282, // C
1337 // inner part theta < 3 degrees
1338 static Double_t x02[5] = { 30413, // Air
1343 // z positions of the materials inside the absober outer part theta > 3 degres
1344 static Double_t zPos[10] = {-90, -105, -315, -443, -468};
1346 Double_t dZ, r0Norm, x0, deltaP, dChi2, pTotal, pOld;
1347 AliMUONHitForRec *hit;
1348 AliMUONRawCluster *clus;
1349 TClonesArray *rawclusters;
1351 // First step to the rear end of the absorber
1352 //AZ(z->-z) Double_t zRear = 503;
1353 Double_t zRear = -503;
1355 Double_t tan3 = TMath::Tan(3./180*TMath::Pi());
1357 // Go through absorber
1358 pOld = 1/(*fTrackPar)(4,0);
1359 Double_t r0Rear = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1360 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1361 r0Rear = TMath::Sqrt(r0Rear)/TMath::Abs(fPosition)/tan3;
1363 Double_t p0, cos25, cos60;
1364 if (!iflag) goto vertex;
1366 for (Int_t i=4; i>=0; i--) {
1367 ParPropagation(zPos[i]);
1368 WeightPropagation(zPos[i], kFALSE);
1369 dZ = TMath::Abs (fPositionNew-fPosition);
1370 if (r0Norm > 1) x0 = x01[i];
1372 MSLine(dZ,x0); // multiple scattering in the medium (linear approximation)
1373 fPosition = fPositionNew;
1374 *fTrackPar = *fTrackParNew;
1375 r0Norm = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1376 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1377 r0Norm = TMath::Sqrt(r0Norm)/TMath::Abs(fPosition)/tan3;
1379 // Correct momentum for energy losses
1380 pTotal = 1/TMath::Abs((*fTrackPar)(4,0));
1382 cos25 = TMath::Cos(2.5/180*TMath::Pi());
1383 cos60 = TMath::Cos(6.0/180*TMath::Pi());
1384 for (Int_t j=0; j<1; j++) {
1388 deltaP = 2.164 + 0.145e-1*p0 - 0.417e-3*p0*p0;
1390 deltaP = 2.275 + 0.102e-2*p0 - 0.674e-6*p0*p0;
1394 deltaP = 2.581 + 0.188e-1*p0 - 0.398e-3*p0*p0;
1396 deltaP = 2.727 + 0.356e-2*p0 + 0.242e-5*p0*p0;
1404 deltaP = 2.737 + 0.0494*p0 - 0.001123*p0*p0;
1406 deltaP = 3.0643 + 0.01346*p0;
1412 deltaP = 2.1380 + 0.0351*p0 - 0.000853*p0*p0;
1414 deltaP = 2.407 + 0.00702*p0;
1423 deltaP = 2.439 + 0.806e-1*p0 - 0.500e-2*p0*p0 + 0.106e-3*p0*p0*p0;
1425 deltaP = 2.767 + 0.742e-2*p0 - 0.196e-4*p0*p0 + 0.403e-7*p0*p0*p0;
1432 deltaP = 2.209 + 0.800e-2*p0;
1434 deltaP = 2.285 + 0.141e-2*p0 - 0.446e-6*p0*p0;
1444 deltaP = 2.5938 + 0.0570 * p0 - 0.001151 * p0 * p0;
1446 deltaP = 3.0714 + 0.011767 * p0;
1450 deltaP = 2.1207 + 0.05478 * p0 - 0.00145079 * p0 * p0;
1452 deltaP = 2.6069 + 0.0051705 * p0;
1458 p0 = pTotal + deltaP/TMath::Abs(TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)));
1460 (*fTrackPar)(4,0) = 1/p0*TMath::Sign((Double_t)1.,(*fTrackPar)(4,0));
1464 ParPropagation((Double_t)0.);
1465 WeightPropagation((Double_t)0., kFALSE);
1466 fPosition = fPositionNew;
1467 //*fTrackPar = *fTrackParNew;
1468 // Add vertex as a hit
1469 TMatrixD pointWeight(fgkSize,fgkSize);
1470 TMatrixD point(fgkSize,1);
1471 TMatrixD trackParTmp = point;
1472 point(0,0) = 0; // vertex coordinate - should be taken somewhere
1473 point(1,0) = 0; // vertex coordinate - should be taken somewhere
1474 pointWeight(0,0) = 1/1.e-3/1.e-3; // 10 um error
1475 pointWeight(1,1) = 1/1.e-3/1.e-3; // 10 um error
1476 TryPoint(point,pointWeight,trackParTmp,dChi2);
1477 *fTrackPar = trackParTmp;
1478 *fWeight += pointWeight;
1479 fChi2 += dChi2; // Chi2
1480 if (fgDebug < 0) return; // no output
1482 cout << pOld << " " << 1/(*fTrackPar)(4,0) << " " << dChi2 << " " << fChi2 << " " << fNTrackHits << endl;
1483 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1484 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1485 printf ("%4d", hit->GetChamberNumber());
1489 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1490 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1491 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1492 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1493 printf ("%4d", fgHitForRec->IndexOf(hit));
1497 if (fgTrackReconstructor->GetRecTrackRefHits()) {
1498 // from track ref. hits
1499 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1500 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1501 cout << hit->GetTTRTrack() + hit->GetTrackRefSignal()*10000 << " ";
1504 // from raw clusters
1505 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1506 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1507 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
1508 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1509 printf ("%4d", clus->GetTrack(1));
1512 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1513 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1514 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
1515 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1516 if (clus->GetTrack(2) != -1) printf ("%4d", clus->GetTrack(2));
1517 else printf ("%4s", " ");
1521 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1522 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1523 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1524 //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " ";
1527 for (Int_t i1=0; i1<fNTrackHits; i1++) printf("%8.4f", (*fChi2Smooth)[i1]);
1529 cout << "---------------------------------------------------" << endl;
1531 // Get covariance matrix
1532 /* Not needed - covariance matrix is not interesting to anybody
1533 *fCovariance = *fWeight;
1534 if (fCovariance->Determinant() != 0) {
1535 // fCovariance->Invert();
1537 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1539 AliWarning(" Determinant fCovariance=0:" );
1544 //__________________________________________________________________________
1545 void AliMUONTrackK::MSLine(Double_t dZ, Double_t x0)
1547 // Adds multiple scattering in a thick layer for linear propagation
1549 Double_t cosAlph = TMath::Cos((*fTrackPar)(2,0));
1550 Double_t tanAlph = TMath::Tan((*fTrackPar)(2,0));
1551 Double_t cosBeta = TMath::Cos((*fTrackPar)(3,0));
1553 sinBeta = TMath::Sin((*fTrackPar)(3,0));
1554 Double_t tanBeta = TMath::Tan((*fTrackPar)(3,0));
1555 Double_t momentum = 1/(*fTrackPar)(4,0);
1556 Double_t velo = 1; // relativistic velocity
1557 Double_t step = TMath::Abs(dZ/cosAlph/cosBeta); // step length
1559 // Projected scattering angle
1560 Double_t theta0 = 0.0136/velo/momentum/TMath::Sqrt(x0)*(1+0.038*TMath::Log(step/x0));
1561 Double_t theta02 = theta0*theta0;
1562 Double_t dl2 = step*step/2*theta02;
1563 Double_t dl3 = dl2*step*2/3;
1566 Double_t dYdT = 1/cosAlph;
1567 Double_t dYdB = 0; //(*fTrackPar)(2,0)*sinBeta/cosAlph;
1568 Double_t dXdT = tanAlph*tanBeta;
1569 //Double_t dXdB = (1+(*fTrackPar)(2,0)*tanAlph*sinBeta*sinBeta)/cosBeta;
1570 Double_t dXdB = 1/cosBeta;
1571 Double_t dAdT = 1/cosBeta;
1572 Double_t dAdB = 0; //(*fTrackPar)(2,0)*tanBeta;
1574 // Get covariance matrix
1575 *fCovariance = *fWeight;
1576 if (fCovariance->Determinant() != 0) {
1577 // fCovariance->Invert();
1579 mnvertLocal(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1581 AliWarning(" Determinant fCovariance=0:" );
1584 (*fCovariance)(0,0) += dl3*(dYdT*dYdT+dYdB*dYdB); // <yy>
1585 (*fCovariance)(1,1) += dl3*(dXdT*dXdT+dXdB*dXdB); // <xx>
1586 (*fCovariance)(2,2) += theta02*step*(dAdT*dAdT+dAdB*dAdB); // <aa>
1587 (*fCovariance)(3,3) += theta02*step; // <bb>
1589 (*fCovariance)(0,1) += dl3*(dYdT*dXdT+dYdB*dXdB); // <yx>
1590 (*fCovariance)(1,0) = (*fCovariance)(0,1);
1592 (*fCovariance)(0,2) += dl2*(dYdT*dAdT+dYdB*dAdB); // <ya>
1593 (*fCovariance)(2,0) = (*fCovariance)(0,2);
1595 (*fCovariance)(0,3) += dl2*dYdB; // <yb>
1596 (*fCovariance)(3,0) = (*fCovariance)(0,3);
1598 (*fCovariance)(1,2) += dl2*(-dXdT*dAdT+dXdB*dAdB); // <xa>
1599 (*fCovariance)(2,1) = (*fCovariance)(1,2);
1601 (*fCovariance)(1,3) += dl2*dXdB; // <xb>
1602 (*fCovariance)(3,1) = (*fCovariance)(1,3);
1604 (*fCovariance)(2,3) += theta02*step*dAdB; // <ab>
1605 (*fCovariance)(3,2) = (*fCovariance)(2,3);
1607 // Get weight matrix
1608 *fWeight = *fCovariance;
1609 if (fWeight->Determinant() != 0) {
1610 // fWeight->Invert();
1612 mnvertLocal(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1614 AliWarning(" Determinant fWeight=0:");
1618 //__________________________________________________________________________
1619 Bool_t AliMUONTrackK::Recover(void)
1621 // Adds new failed track(s) which can be tried to be recovered
1623 TClonesArray *trackPtr;
1624 AliMUONTrackK *trackK;
1626 if (fgDebug > 0) cout << " ******** Enter Recover " << endl;
1627 trackPtr = fgTrackReconstructor->GetRecTracksPtr();
1629 // Remove hit with the highest chi2
1632 for (Int_t i=0; i<fNTrackHits; i++) {
1633 chi2 = fChi2Smooth ? (*fChi2Smooth)[i] : (*fChi2Array)[i];
1634 printf("%10.4f", chi2);
1637 for (Int_t i=0; i<fNTrackHits; i++) {
1638 printf("%10d", ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(i))->GetChamberNumber());
1642 Double_t chi2_max = 0;
1644 for (Int_t i=0; i<fNTrackHits; i++) {
1645 chi2 = fChi2Smooth ? (*fChi2Smooth)[i] : (*fChi2Array)[i];
1646 if (chi2 < chi2_max) continue;
1650 //if (chi2_max < 10) return kFALSE; // !!!
1651 //if (chi2_max < 25) imax = fNTrackHits - 1;
1652 if (chi2_max < 15) imax = fNTrackHits - 1; // discard the last point
1653 // Check if the outlier is not from the seed segment
1654 AliMUONHitForRec *skipHit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(imax);
1655 if (skipHit == fStartSegment->GetHitForRec1() || skipHit == fStartSegment->GetHitForRec2()) {
1656 //DropBranches(fStartSegment); // drop all tracks with the same seed segment
1657 return kFALSE; // to be changed probably
1660 // Make a copy of track hit collection
1661 TObjArray *hits = new TObjArray(*fTrackHitsPtr);
1665 // Hits after the found one will be removed
1666 if (GetStation0() == 3 && skipHit->GetChamberNumber() > 7) {
1667 SortHits(1, fTrackHitsPtr); // unsort hits
1668 imax = fTrackHitsPtr->IndexOf(skipHit);
1670 Int_t nTrackHits = fNTrackHits;
1671 for (Int_t i=imax+1; i<nTrackHits; i++) {
1672 AliMUONHitForRec *hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(i);
1673 fTrackHitsPtr->Remove(hit);
1674 hit->SetNTrackHits(hit->GetNTrackHits()-1); // unmark hit
1678 // Check if the track candidate doesn't exist yet
1679 if (ExistDouble()) { delete hits; return kFALSE; }
1681 //DropBranches(imax0, hits); // drop branches downstream the discarded hit
1684 nRecTracks = fgTrackReconstructor->GetNRecTracks();
1685 skipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-1]);
1686 // Remove all saved steps and smoother matrices after the skipped hit
1687 RemoveMatrices(skipHit->GetZ());
1689 //AZ(z->-z) if (skipHit->GetZ() > fStartSegment->GetHitForRec2()->GetZ() || !fNSteps) {
1690 if (TMath::Abs(skipHit->GetZ()) > TMath::Abs(fStartSegment->GetHitForRec2()->GetZ()) || !fNSteps) {
1691 // Propagation toward high Z or skipped hit next to segment -
1692 // start track from segment
1693 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
1694 fgTrackReconstructor->SetNRecTracks(nRecTracks+1);
1695 trackK->fRecover = 1;
1696 trackK->fSkipHit = skipHit;
1697 trackK->fNTrackHits = fNTrackHits;
1698 delete trackK->fTrackHitsPtr; // not efficient ?
1699 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
1700 if (fgDebug > 0) cout << nRecTracks << " " << trackK->fRecover << endl;
1704 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
1706 fgTrackReconstructor->SetNRecTracks(nRecTracks+1);
1707 //AZ(z->-z) trackK->fTrackDir = -1;
1708 trackK->fTrackDir = 1;
1709 trackK->fRecover = 1;
1710 trackK->fSkipHit = skipHit;
1711 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
1713 trackK->fParFilter->Last()->SetUniqueID(iD-1);
1714 CreateMatrix(trackK->fParFilter);
1716 trackK->fParFilter->Last()->SetUniqueID(iD);
1718 *((TMatrixD*)trackK->fParFilter->Last()) = *((TMatrixD*)fParExtrap->Last());
1719 *(trackK->fTrackPar) = *((TMatrixD*)trackK->fParFilter->Last());
1720 iD = trackK->fCovFilter->Last()->GetUniqueID();
1722 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
1723 CreateMatrix(trackK->fCovFilter);
1725 trackK->fCovFilter->Last()->SetUniqueID(iD);
1727 *((TMatrixD*)trackK->fCovFilter->Last()) = *((TMatrixD*)fCovExtrap->Last());
1728 *(trackK->fWeight) = *((TMatrixD*)trackK->fCovFilter->Last());
1729 if (trackK->fWeight->Determinant() != 0) {
1731 mnvertLocal(&((*(trackK->fWeight))(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1733 AliWarning(" Determinant fWeight=0:");
1735 trackK->fPosition = trackK->fPositionNew = (*fSteps)[fNSteps-1];
1737 for (Int_t i=0; i<fNTrackHits-1; i++) trackK->fChi2 += (*fChi2Array)[i];
1738 if (fgDebug > 0) cout << nRecTracks << " " << trackK->fRecover << endl;
1742 //__________________________________________________________________________
1743 void AliMUONTrackK::AddMatrices(AliMUONTrackK *trackK, Double_t dChi2, AliMUONHitForRec *hitAdd)
1745 // Adds matrices for the smoother and keep Chi2 for the point
1747 //trackK->fParFilter->Last()->Print();
1748 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
1750 trackK->fParFilter->Last()->SetUniqueID(iD-1);
1751 CreateMatrix(trackK->fParFilter);
1754 *((TMatrixD*)(trackK->fParFilter->Last())) = *(trackK->fTrackPar);
1755 trackK->fParFilter->Last()->SetUniqueID(iD);
1757 cout << " Add matrices" << " " << fPosition << " " << dChi2 << " " << fgHitForRec->IndexOf(hitAdd) << endl;
1758 //trackK->fTrackPar->Print();
1759 //trackK->fTrackParNew->Print();
1760 trackK->fParFilter->Last()->Print();
1761 cout << " Add matrices" << endl;
1764 *(trackK->fCovariance) = *(trackK->fWeight);
1765 if (trackK->fCovariance->Determinant() != 0) {
1767 mnvertLocal(&((*(trackK->fCovariance))(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1769 AliWarning(" Determinant fCovariance=0:");
1771 iD = trackK->fCovFilter->Last()->GetUniqueID();
1773 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
1774 CreateMatrix(trackK->fCovFilter);
1777 *((TMatrixD*)(trackK->fCovFilter->Last())) = *(trackK->fCovariance);
1778 trackK->fCovFilter->Last()->SetUniqueID(iD);
1780 // Save Chi2-increment for point
1781 Int_t indx = trackK->fTrackHitsPtr->IndexOf(hitAdd);
1782 if (indx < 0) indx = fNTrackHits;
1783 if (trackK->fChi2Array->fN <= indx) trackK->fChi2Array->Set(indx+10);
1784 trackK->fChi2Array->AddAt(dChi2,indx);
1787 //__________________________________________________________________________
1788 void AliMUONTrackK::CreateMatrix(TObjArray *objArray)
1790 // Create new matrix and add it to TObjArray
1792 TMatrixD *matrix = (TMatrixD*) objArray->First();
1793 TMatrixD *tmp = new TMatrixD(*matrix);
1794 objArray->AddAtAndExpand(tmp,objArray->GetLast());
1795 //cout << " !!! " << tmp << " " << tmp->GetUniqueID() << " " << tmp->GetNoElements() << endl;
1798 //__________________________________________________________________________
1799 void AliMUONTrackK::RemoveMatrices(Double_t zEnd)
1801 // Remove matrices (and saved steps) in the smoother part with abs(z) < abs(zEnd)
1803 for (Int_t i=fNSteps-1; i>=0; i--) {
1804 if (fgDebug > 1) printf("%10.4f %10.4f \n", (*fSteps)[i], zEnd);
1805 if (TMath::Abs((*fSteps)[i]) > TMath::Abs(zEnd) - 0.01) break;
1806 RemoveMatrices(this);
1807 } // for (Int_t i=fNSteps-1;
1810 //__________________________________________________________________________
1811 void AliMUONTrackK::RemoveMatrices(AliMUONTrackK* trackK)
1813 // Remove last saved matrices and steps in the smoother part
1816 Int_t i = trackK->fNSteps;
1819 // Delete only matrices not shared by several tracks
1820 id = trackK->fParExtrap->Last()->GetUniqueID();
1822 trackK->fParExtrap->Last()->SetUniqueID(id-1);
1823 trackK->fParExtrap->RemoveAt(i);
1825 else ((TMatrixD*)(trackK->fParExtrap->RemoveAt(i)))->Delete();
1826 id = fParFilter->Last()->GetUniqueID();
1828 trackK->fParFilter->Last()->SetUniqueID(id-1);
1829 trackK->fParFilter->RemoveAt(i);
1831 else ((TMatrixD*)(trackK->fParFilter->RemoveAt(i)))->Delete();
1832 id = trackK->fCovExtrap->Last()->GetUniqueID();
1834 trackK->fCovExtrap->Last()->SetUniqueID(id-1);
1835 trackK->fCovExtrap->RemoveAt(i);
1837 else ((TMatrixD*)(trackK->fCovExtrap->RemoveAt(i)))->Delete();
1838 id = trackK->fCovFilter->Last()->GetUniqueID();
1840 trackK->fCovFilter->Last()->SetUniqueID(id-1);
1841 trackK->fCovFilter->RemoveAt(i);
1843 else ((TMatrixD*)(trackK->fCovFilter->RemoveAt(i)))->Delete();
1844 id = trackK->fJacob->Last()->GetUniqueID();
1846 trackK->fJacob->Last()->SetUniqueID(id-1);
1847 trackK->fJacob->RemoveAt(i);
1849 else ((TMatrixD*)(trackK->fJacob->RemoveAt(i)))->Delete();
1852 //__________________________________________________________________________
1853 Bool_t AliMUONTrackK::Smooth(void)
1856 Int_t ihit = fNTrackHits - 1;
1857 AliMUONHitForRec *hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[ihit];
1858 fChi2Smooth = new TArrayD(fNTrackHits);
1859 fChi2Smooth->Reset(-1);
1861 fParSmooth = new TObjArray(15);
1862 fParSmooth->Clear();
1865 cout << " ******** Enter Smooth " << endl;
1866 cout << (*fSteps)[fNSteps-1] << " " << fPosition << " " << fPositionNew << endl;
1868 for (Int_t i=fNSteps-1; i>=0; i--) cout << (*fSteps)[i] << " ";
1870 for (Int_t i=fNSteps-1; i>=0; i--) {cout << i << " " << (*fSteps)[i]; ((TMatrixD*)fParFilter->UncheckedAt(i))->Print(); ((TMatrixD*)fParExtrap->UncheckedAt(i))->Print(); ((TMatrixD*)fJacob->UncheckedAt(i))->Print();}
1872 for (Int_t i=ihit; i>=0; i--) cout << ((AliMUONHitForRec*)(*fTrackHitsPtr)[i])->GetZ() << " ";
1876 // Find last point corresponding to the last hit
1877 Int_t iLast = fNSteps - 1;
1878 for ( ; iLast>=0; iLast--) {
1879 //AZ(z->-z) if ((*fSteps)[iLast] + 0.01 > ((AliMUONHitForRec*)(*fTrackHitsPtr)[fNTrackHits-1])->GetZ()) break;
1880 if (TMath::Abs((*fSteps)[iLast]) + 0.01 > TMath::Abs(((AliMUONHitForRec*)(*fTrackHitsPtr)[fNTrackHits-1])->GetZ())) break;
1883 TMatrixD parSmooth = *((TMatrixD*)(fParFilter->UncheckedAt(iLast))); // last filtered = first smoothed
1885 TMatrixD covSmooth = *((TMatrixD*)(fCovFilter->UncheckedAt(iLast))); // last filtered = first smoothed
1886 TMatrixD tmp=covSmooth, weight=covSmooth, gain = covSmooth;
1887 TMatrixD tmpPar = *fTrackPar;
1888 //parSmooth.Print(); ((TMatrixD*)(fParExtrap->Last()))->Print();
1891 Double_t chi2_max = 0;
1892 for (Int_t i=iLast+1; i>0; i--) {
1893 if (i == iLast + 1) goto L33; // temporary fix
1895 // Smoother gain matrix
1896 weight = *((TMatrixD*)(fCovExtrap->UncheckedAt(i)));
1897 if (weight.Determinant() != 0) {
1899 mnvertLocal(&(weight(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1901 AliWarning(" Determinant weight=0:");
1904 tmp = TMatrixD(*((TMatrixD*)(fJacob->UncheckedAt(i))),TMatrixD::kTransposeMult,weight);
1905 gain = TMatrixD(*((TMatrixD*)(fCovFilter->UncheckedAt(i-1))),TMatrixD::kMult,tmp);
1906 //cout << (*fSteps)[i-1] << " " << (*fSteps)[i] << endl; gain.Print();
1908 // Smoothed parameter vector
1909 //((TMatrixD*)(fParExtrap->UncheckedAt(i)))->Dump();
1910 parSmooth -= *((TMatrixD*)(fParExtrap->UncheckedAt(i)));
1911 tmpPar = *((TMatrixD*)(fParFilter->UncheckedAt(i-1)));
1912 tmpPar += TMatrixD(gain,TMatrixD::kMult,parSmooth);
1915 // Smoothed covariance
1916 covSmooth -= *((TMatrixD*)(fCovExtrap->UncheckedAt(i)));
1917 weight = TMatrixD(TMatrixD::kTransposed,gain);
1918 tmp = TMatrixD(covSmooth,TMatrixD::kMult,weight);
1919 covSmooth = *((TMatrixD*)(fCovFilter->UncheckedAt(i-1)));
1920 covSmooth += TMatrixD(gain,TMatrixD::kMult,tmp);
1922 // Check if there was a measurement at given z
1924 for ( ; ihit>=0; ihit--) {
1925 hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[ihit];
1926 if (TMath::Abs(hit->GetZ()-(*fSteps)[i-1]) < 0.1) { found = kTRUE; break; }
1927 //AZ(z->-z) else if (ihit < fNTrackHits-1 && hit->GetZ() > (*fSteps)[i-1]) { ihit++; break; }
1928 else if (ihit < fNTrackHits-1 && TMath::Abs(hit->GetZ()) > TMath::Abs((*fSteps)[i-1])) { ihit++; break; }
1930 if (!found) continue; // no measurement - skip the rest
1931 else if (fgDebug > 1) cout << i << " " << ihit << " " << hit->GetZ() << endl;
1932 if (ihit == 0) continue; // the first hit - skip the rest
1935 // Smoothed residuals
1937 tmpPar(0,0) = hit->GetBendingCoor() - parSmooth(0,0); // bending coordinate
1938 tmpPar(1,0) = hit->GetNonBendingCoor() - parSmooth(1,0); // non-bending coordinate
1940 cout << hit->GetBendingCoor() << " " << parSmooth(0,0) << " " << tmpPar(0,0) << endl;
1941 cout << hit->GetNonBendingCoor() << " " << parSmooth(1,0) << " " << tmpPar(1,0) << endl;
1943 // Cov. matrix of smoothed residuals
1945 tmp(0,0) = hit->GetBendingReso2() - covSmooth(0,0);
1946 tmp(1,1) = hit->GetNonBendingReso2() - covSmooth(1,1);
1947 tmp(0,1) = tmp(1,0) = -covSmooth(0,1);
1948 tmp(2,2) = tmp(3,3) = tmp(4,4) = 1;
1950 // Calculate Chi2 of smoothed residuals
1951 if (tmp.Determinant() != 0) {
1953 mnvertLocal(&(tmp(0,0)), fgkSize,fgkSize,fgkSize,ifail);
1955 AliWarning(" Determinant tmp=0:");
1957 TMatrixD vector(tmp,TMatrixD::kMult,tmpPar);
1958 TMatrixD chi2(tmpPar,TMatrixD::kTransposeMult,vector);
1959 if (fgDebug > 1) chi2.Print();
1960 (*fChi2Smooth)[ihit] = chi2(0,0);
1961 if (chi2(0,0) > chi2_max) chi2_max = chi2(0,0);
1963 if (chi2(0,0) < 0) {
1964 chi2.Print(); cout << " chi2 < 0 " << i << " " << iLast << endl;
1965 //AliFatal("chi2 < 0.");
1967 // Save smoothed parameters
1968 TMatrixD *par = new TMatrixD(parSmooth);
1969 fParSmooth->AddAtAndExpand(par, ihit);
1971 } // for (Int_t i=iLast+1;
1973 //if (chi2_max > 16) {
1974 //if (chi2_max > 25) {
1975 //if (chi2_max > 50) {
1976 //if (chi2_max > 100) {
1977 if (chi2_max > fgkChi2max) {
1978 //if (Recover()) DropBranches();
1986 //__________________________________________________________________________
1987 void AliMUONTrackK::Outlier()
1989 // Adds new track with removed hit having the highest chi2
1992 cout << " ******** Enter Outlier " << endl;
1993 for (Int_t i=0; i<fNTrackHits; i++) printf("%10.4f", (*fChi2Smooth)[i]);
1995 for (Int_t i=0; i<fNTrackHits; i++) {
1996 printf("%10d", ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(i))->GetChamberNumber());
2001 Double_t chi2_max = 0;
2003 for (Int_t i=0; i<fNTrackHits; i++) {
2004 if ((*fChi2Smooth)[i] < chi2_max) continue;
2005 chi2_max = (*fChi2Smooth)[i];
2008 // Check if the outlier is not from the seed segment
2009 AliMUONHitForRec *hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(imax);
2010 if (hit == fStartSegment->GetHitForRec1() || hit == fStartSegment->GetHitForRec2()) return; // to be changed probably
2012 // Check for missing station
2015 if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(1))->GetChamberNumber() < 8) ok--;
2016 } else if (imax == fNTrackHits-1) {
2017 if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(fNTrackHits-2))->GetChamberNumber() > 1) ok--;
2019 else if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(imax-1))->GetChamberNumber()/2 - ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(imax+1))->GetChamberNumber()/2 > 1) ok--;
2020 if (!ok) { Recover(); return; } // try to recover track
2021 //AZ if (!ok) { if (fgDebug >= 0) cout << imax << endl; DropBranches(imax, 0); return; }
2023 // Remove saved steps and smoother matrices after the outlier
2024 RemoveMatrices(hit->GetZ());
2026 // Check for possible double track candidates
2027 //if (ExistDouble(hit)) return;
2029 TClonesArray *trackPtr = fgTrackReconstructor->GetRecTracksPtr();
2030 Int_t nRecTracks = fgTrackReconstructor->GetNRecTracks();
2032 AliMUONTrackK *trackK = 0;
2033 if (!fNSteps || GetStation0() == 3 && hit->GetChamberNumber() > 7) {
2034 // start track from segment
2035 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
2036 fgTrackReconstructor->SetNRecTracks(nRecTracks+1);
2037 trackK->fRecover = 2;
2038 trackK->fSkipHit = hit;
2039 trackK->fNTrackHits = fNTrackHits;
2040 delete trackK->fTrackHitsPtr; // not efficient ?
2041 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
2042 if (GetStation0() == 3) trackK->SortHits(1, trackK->fTrackHitsPtr);
2043 if (fgDebug > 0) cout << nRecTracks << " Outlier" << endl;
2046 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
2048 fgTrackReconstructor->SetNRecTracks(nRecTracks+1);
2049 //AZ(z->-z) trackK->fTrackDir = -1;
2050 trackK->fTrackDir = 1;
2051 trackK->fRecover = 2;
2052 trackK->fSkipHit = hit;
2053 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
2055 trackK->fParFilter->Last()->SetUniqueID(iD-1);
2056 CreateMatrix(trackK->fParFilter);
2058 trackK->fParFilter->Last()->SetUniqueID(iD);
2060 *((TMatrixD*)trackK->fParFilter->Last()) = *((TMatrixD*)fParExtrap->Last());
2061 *(trackK->fTrackPar) = *((TMatrixD*)trackK->fParFilter->Last());
2062 iD = trackK->fCovFilter->Last()->GetUniqueID();
2064 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
2065 CreateMatrix(trackK->fCovFilter);
2067 trackK->fCovFilter->Last()->SetUniqueID(iD);
2069 *((TMatrixD*)trackK->fCovFilter->Last()) = *((TMatrixD*)fCovExtrap->Last());
2070 *(trackK->fWeight) = *((TMatrixD*)trackK->fCovFilter->Last());
2071 if (trackK->fWeight->Determinant() != 0) {
2073 mnvertLocal(&((*(trackK->fWeight))(0,0)), fgkSize,fgkSize,fgkSize,ifail);
2075 AliWarning(" Determinant fWeight=0:");
2077 trackK->fPosition = trackK->fPositionNew = (*fSteps)[fNSteps-1];
2079 for (Int_t i=0; i<fNTrackHits-1; i++) trackK->fChi2 += (*fChi2Array)[i];
2080 if (fgDebug > 0) cout << nRecTracks << " Outlier " << trackK->fChi2 << endl;
2083 //__________________________________________________________________________
2084 Double_t AliMUONTrackK::GetChi2PerPoint(Int_t iPoint) const
2086 // Return Chi2 at point
2087 return fChi2Smooth ? (*fChi2Smooth)[iPoint] : (*fChi2Array)[iPoint];
2091 //__________________________________________________________________________
2092 void AliMUONTrackK::Print(FILE *lun) const
2094 // Print out track information
2097 AliMUONHitForRec *hit = 0;
2098 if (fgTrackReconstructor->GetRecTrackRefHits()) {
2099 // from track ref. hits
2100 for (Int_t j=0; j<fNTrackHits; j++) {
2101 hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(j);
2102 if (hit->GetTTRTrack() > 1) { flag = 0; break; }
2104 for (Int_t j=0; j<fNTrackHits; j++) {
2105 printf("%10.4f", GetChi2PerPoint(j));
2106 if (GetChi2PerPoint(j) > -0.1) {
2107 hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(j);
2108 fprintf(lun,"%3d %3d %10.4f", gAlice->GetEvNumber(), hit->GetChamberNumber(), GetChi2PerPoint(j));
2109 fprintf(lun, "%3d %3d %3d \n", hit->GetTrackRefSignal(), hit->GetTTRTrack(), flag);
2114 // from raw clusters
2115 AliMUONRawCluster *clus = 0;
2116 TClonesArray *rawclusters = 0;
2117 for (Int_t i1=0; i1<fNTrackHits; i1++) {
2118 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
2119 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
2120 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
2121 if (TMath::Abs(clus->GetTrack(1)-1) < 2) {
2122 if (clus->GetTrack(2)) flag = 2;
2125 if (clus->GetTrack(2) && TMath::Abs(clus->GetTrack(2)-1) < 2) {
2132 Int_t sig[2]={1,1}, tid[2]={0};
2133 for (Int_t i1=0; i1<fNTrackHits; i1++) {
2134 if (GetChi2PerPoint(i1) < -0.1) continue;
2135 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
2136 rawclusters = fgTrackReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
2137 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
2138 for (Int_t j=0; j<2; j++) {
2139 tid[j] = clus->GetTrack(j+1) - 1;
2140 if (clus->GetTrack(j+1) < 0) { sig[j] = 0; tid[j] = 999; }
2142 fprintf(lun,"%3d %3d %10.4f", gAlice->GetEvNumber(), hit->GetChamberNumber(), GetChi2PerPoint(i1));
2143 if (!(clus->GetTrack(2))) fprintf(lun, "%3d %3d", sig[0], tid[0]); // simple cluster
2144 else { // track overlap
2145 fprintf(lun, "%3d %3d", TMath::Max(sig[0],sig[1]), TMath::Min(tid[0],tid[1]));
2146 //if (tid[0] < 2) flag *= 2;
2147 //else if (tid[1] < 2) flag *= 3;
2149 fprintf (lun, "%3d \n", flag);
2154 //__________________________________________________________________________
2155 void AliMUONTrackK::DropBranches(Int_t imax, TObjArray *hits)
2157 // Drop branches downstream of the skipped hit
2159 TClonesArray *trackPtr;
2160 AliMUONTrackK *trackK;
2162 trackPtr = fgTrackReconstructor->GetRecTracksPtr();
2163 nRecTracks = fgTrackReconstructor->GetNRecTracks();
2164 Int_t icand = trackPtr->IndexOf(this);
2165 if (!hits) hits = fTrackHitsPtr;
2167 // Check if the track candidate doesn't exist yet
2168 for (Int_t i=icand+1; i<nRecTracks; i++) {
2169 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2170 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2171 if (trackK->GetRecover() < 0) continue;
2173 if (trackK->fNTrackHits >= imax + 1) {
2174 for (Int_t j=0; j<=imax; j++) {
2175 //if (j != fNTrackHits-1 && (*trackK->fTrackHitsPtr)[j] != (*fTrackHitsPtr)[j]) break;
2176 if ((*trackK->fTrackHitsPtr)[j] != (*hits)[j]) break;
2178 if (hits != fTrackHitsPtr) {
2179 // Drop all branches downstream the hit (for Recover)
2180 trackK->SetRecover(-1);
2181 if (fgDebug >= 0 )cout << " Recover " << i << endl;
2184 // Check if the removal of the hit breaks the track
2187 if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(1))->GetChamberNumber() < 8) ok--; }
2188 else if (imax == trackK->fNTrackHits-1) continue;
2189 // else if (imax == trackK->fNTrackHits-1) {
2190 //if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(trackK->fNTrackHits-2))->GetChamberNumber() > 1) ok--;
2192 else if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(imax-1))->GetChamberNumber()/2 - ((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(imax+1))->GetChamberNumber()/2 > 1) ok--;
2193 if (!ok) trackK->SetRecover(-1);
2195 } // for (Int_t j=0;
2197 } // for (Int_t i=0;
2200 //__________________________________________________________________________
2201 void AliMUONTrackK::DropBranches(AliMUONSegment *segment)
2203 // Drop all candidates with the same seed segment
2205 TClonesArray *trackPtr;
2206 AliMUONTrackK *trackK;
2208 trackPtr = fgTrackReconstructor->GetRecTracksPtr();
2209 nRecTracks = fgTrackReconstructor->GetNRecTracks();
2210 Int_t icand = trackPtr->IndexOf(this);
2212 for (Int_t i=icand+1; i<nRecTracks; i++) {
2213 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2214 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2215 if (trackK->GetRecover() < 0) continue;
2216 if (trackK->fStartSegment == segment) trackK->SetRecover(-1);
2218 if (fgDebug >= 0) cout << " Drop segment " << endl;
2221 //__________________________________________________________________________
2222 AliMUONHitForRec* AliMUONTrackK::GetHitLastOk(void)
2224 // Return the hit where track stopped
2226 if (!fNSteps) return (AliMUONHitForRec*)((*fTrackHitsPtr)[1]);
2230 //__________________________________________________________________________
2231 Int_t AliMUONTrackK::GetStation0(void)
2233 // Return seed station number
2234 return fStartSegment->GetHitForRec1()->GetChamberNumber() / 2;
2237 //__________________________________________________________________________
2238 Bool_t AliMUONTrackK::ExistDouble(AliMUONHitForRec *hit)
2240 // Check if the track will make a double after outlier removal
2242 TClonesArray *trackPtr = fgTrackReconstructor->GetRecTracksPtr();
2243 Int_t nRecTracks = fgTrackReconstructor->GetNRecTracks();
2244 TObjArray *hitArray = new TObjArray(*fTrackHitsPtr);
2245 TObjArray *hitArray1 = new TObjArray(*hitArray);
2246 hitArray1->Remove(hit);
2247 hitArray1->Compress();
2249 Bool_t same = kFALSE;
2250 for (Int_t i=0; i<nRecTracks; i++) {
2251 AliMUONTrackK *trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2252 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2253 if (trackK == this) continue;
2254 if (trackK->fNTrackHits == fNTrackHits || trackK->fNTrackHits == fNTrackHits-1) {
2255 TObjArray *hits = new TObjArray(*trackK->fTrackHitsPtr);
2257 if (trackK->fNTrackHits == fNTrackHits) {
2258 for (Int_t j=0; j<fNTrackHits; j++) {
2259 if (hits->UncheckedAt(j) != hitArray->UncheckedAt(j)) { same = kFALSE; break; }
2261 if (same) { delete hits; break; }
2262 if (trackK->fSkipHit) {
2263 TObjArray *hits1 = new TObjArray(*hits);
2264 if (hits1->Remove(trackK->fSkipHit) > 0) {
2267 for (Int_t j=0; j<fNTrackHits-1; j++) {
2268 if (hits1->UncheckedAt(j) != hitArray1->UncheckedAt(j)) { same = kFALSE; break; }
2270 if (same) { delete hits1; break; }
2275 // Check with removed outlier
2277 for (Int_t j=0; j<fNTrackHits-1; j++) {
2278 if (hits->UncheckedAt(j) != hitArray1->UncheckedAt(j)) { same = kFALSE; break; }
2280 if (same) { delete hits; break; }
2284 } // for (Int_t i=0; i<nRecTracks;
2285 delete hitArray; delete hitArray1;
2286 if (same && fgDebug >= 0) cout << " Same" << endl;
2290 //__________________________________________________________________________
2291 Bool_t AliMUONTrackK::ExistDouble(void)
2293 // Check if the track will make a double after recovery
2295 TClonesArray *trackPtr = fgTrackReconstructor->GetRecTracksPtr();
2296 Int_t nRecTracks = fgTrackReconstructor->GetNRecTracks();
2298 TObjArray *hitArray = new TObjArray(*fTrackHitsPtr);
2299 if (GetStation0() == 3) SortHits(0, hitArray); // sort
2300 //if (GetStation0() == 3) SortHits(1, hitArray); // unsort
2302 Bool_t same = kFALSE;
2303 for (Int_t i=0; i<nRecTracks; i++) {
2304 AliMUONTrackK *trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2305 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2306 if (trackK == this) continue;
2307 //AZ if (trackK->GetRecover() < 0) continue; //
2308 if (trackK->fNTrackHits >= fNTrackHits) {
2309 TObjArray *hits = new TObjArray(*trackK->fTrackHitsPtr);
2310 if (trackK->GetStation0() == 3) SortHits(0, hits); // sort
2311 //if (trackK->GetStation0() == 3) SortHits(1, hits); // unsort
2312 for (Int_t j=0; j<fNTrackHits; j++) {
2313 //cout << fNTrackHits << " " << i << " " << j << " " << (*hitArray)[j] << " " << (*hits)[j] << " " << trackK->fSkipHit << endl;
2314 if (j != fNTrackHits-1 && (*hitArray)[j] != (*hits)[j]) break;
2315 if (j == fNTrackHits-1) {
2316 if (trackK->fSkipHit && TMath::Abs(((AliMUONHitForRec*)((*hitArray)[j]))->GetZ()-trackK->fSkipHit->GetZ()) < 0.5) same = kTRUE;
2317 //if (trackK->fNTrackHits > fNTrackHits &&
2318 //if (trackK->fSkipHit) cout << ((AliMUONHitForRec*)((*hitArray)[j]))->GetZ() << " " << trackK->fSkipHit->GetZ() << endl;
2320 } // for (Int_t j=0;
2324 } // for (Int_t i=0;