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 "AliMUONEventReconstructor.h"
29 #include "AliMUONSegment.h"
30 #include "AliMUONHitForRec.h"
31 #include "AliMUONRawCluster.h"
32 #include "AliMUONTrackParam.h"
36 const Int_t AliMUONTrackK::fgkSize = 5;
37 const Int_t AliMUONTrackK::fgkNSigma = 6;
38 const Double_t AliMUONTrackK::fgkChi2max = 25;
39 const Int_t AliMUONTrackK::fgkTriesMax = 10000;
40 const Double_t AliMUONTrackK::fgkEpsilon = 0.002;
42 void mnvertLocalK(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail);
44 ClassImp(AliMUONTrackK) // Class implementation in ROOT context
46 // A few calls in Fortran or from Fortran (extrap.F).
48 # define extrap_onestep_helix extrap_onestep_helix_
49 # define extrap_onestep_helix3 extrap_onestep_helix3_
50 # define extrap_onestep_rungekutta extrap_onestep_rungekutta_
51 # define gufld_double gufld_double_
53 # define extrap_onestep_helix EXTRAP_ONESTEP_HELIX
54 # define extrap_onestep_helix3 EXTRAP_ONESTEP_HELIX3
55 # define extrap_onestep_rungekutta EXTRAP_ONESTEP_RUNGEKUTTA
56 # define gufld_double GUFLD_DOUBLE
60 void type_of_call extrap_onestep_helix
61 (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
63 void type_of_call extrap_onestep_helix3
64 (Double_t &Field, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
66 void type_of_call extrap_onestep_rungekutta
67 (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
69 void type_of_call gufld_double(Double_t *Position, Double_t *Field);
70 /* void type_of_call gufld_double(Double_t *Position, Double_t *Field) {
71 // interface to "gAlice->Field()->Field" for arguments in double precision
73 x[0] = Position[0]; x[1] = Position[1]; x[2] = Position[2];
74 gAlice->Field()->Field(x, b);
75 Field[0] = b[0]; Field[1] = b[1]; Field[2] = b[2];
80 Int_t AliMUONTrackK::fgDebug = -1;
81 Int_t AliMUONTrackK::fgNOfPoints = 0;
82 AliMUON* AliMUONTrackK::fgMUON = NULL;
83 AliMUONEventReconstructor* AliMUONTrackK::fgEventReconstructor = NULL;
84 TClonesArray* AliMUONTrackK::fgHitForRec = NULL;
85 //FILE *lun1 = fopen("window.dat","w");
87 //__________________________________________________________________________
88 AliMUONTrackK::AliMUONTrackK()
92 // Default constructor
94 fgEventReconstructor = NULL; // pointer to event reconstructor
95 fgMUON = NULL; // pointer to Muon module
96 fgHitForRec = NULL; // pointer to points
97 fgNOfPoints = 0; // number of points
100 fTrackHitsPtr = NULL;
102 fTrackPar = fTrackParNew = NULL;
103 fCovariance = fWeight = NULL;
105 fParExtrap = fParFilter = fParSmooth = NULL;
106 fCovExtrap = fCovFilter = NULL;
108 fSteps = NULL; fNSteps = 0;
115 //__________________________________________________________________________
116 AliMUONTrackK::AliMUONTrackK(AliMUONEventReconstructor *EventReconstructor, TClonesArray *hitForRec)
122 if (!EventReconstructor) return;
123 fgEventReconstructor = EventReconstructor; // pointer to event reconstructor
124 fgMUON = (AliMUON*) gAlice->GetModule("MUON"); // pointer to Muon module
125 fgHitForRec = hitForRec; // pointer to points
126 fgNOfPoints = fgHitForRec->GetEntriesFast(); // number of points
128 fStartSegment = NULL;
129 fTrackHitsPtr = NULL;
132 fTrackPar = fTrackParNew = NULL;
133 fCovariance = fWeight = NULL;
135 fParExtrap = fParFilter = fParSmooth = NULL;
136 fCovExtrap = fCovFilter = NULL;
138 fSteps = NULL; fNSteps = 0;
143 //__________________________________________________________________________
144 AliMUONTrackK::AliMUONTrackK(AliMUONSegment *segment)
146 : AliMUONTrack(segment, segment, fgEventReconstructor)
148 // Constructor from a segment
150 AliMUONHitForRec *hit1, *hit2;
151 AliMUONRawCluster *clus;
152 TClonesArray *rawclusters;
154 fStartSegment = segment;
157 // Pointers to hits from the segment
158 hit1 = segment->GetHitForRec1();
159 hit2 = segment->GetHitForRec2();
160 hit1->SetNTrackHits(hit1->GetNTrackHits()+1); // mark hit as being on track
161 hit2->SetNTrackHits(hit2->GetNTrackHits()+1); // mark hit as being on track
162 // check sorting in Z
163 if (TMath::Abs(hit1->GetZ()) > TMath::Abs(hit2->GetZ())) {
165 hit2 = segment->GetHitForRec1();
167 // memory allocation for the TObjArray of pointers to reconstructed TrackHit's
168 fTrackHitsPtr = new TObjArray(13);
172 fTrackPar = new TMatrixD(fgkSize,1); // track parameters
173 fTrackParNew = new TMatrixD(fgkSize,1); // track parameters
174 fCovariance = new TMatrixD(fgkSize,fgkSize); // covariance matrix
175 fWeight = new TMatrixD(fgkSize,fgkSize); // weight matrix (inverse of covariance)
177 // Fill array of track parameters
178 if (hit1->GetChamberNumber() > 7) {
179 // last tracking station
180 (*fTrackPar)(0,0) = hit1->GetBendingCoor(); // y
181 (*fTrackPar)(1,0) = hit1->GetNonBendingCoor(); // x
182 fPosition = hit1->GetZ(); // z
183 fTrackHitsPtr->Add(hit2); // add hit 2
184 fTrackHitsPtr->Add(hit1); // add hit 1
185 //AZ(Z->-Z) fTrackDir = -1;
188 // last but one tracking station
189 (*fTrackPar)(0,0) = hit2->GetBendingCoor(); // y
190 (*fTrackPar)(1,0) = hit2->GetNonBendingCoor(); // x
191 fPosition = hit2->GetZ(); // z
192 fTrackHitsPtr->Add(hit1); // add hit 1
193 fTrackHitsPtr->Add(hit2); // add hit 2
194 //AZ(Z->-Z) fTrackDir = 1;
197 dZ = hit2->GetZ() - hit1->GetZ();
198 dY = hit2->GetBendingCoor() - hit1->GetBendingCoor();
199 dX = hit2->GetNonBendingCoor() - hit1->GetNonBendingCoor();
200 (*fTrackPar)(2,0) = TMath::ATan2(dY,dZ); // alpha
201 (*fTrackPar)(3,0) = TMath::ATan2(dX,dZ/TMath::Cos((*fTrackPar)(2,0))); // beta
202 (*fTrackPar)(4,0) = 1/fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()); // 1/Pt
203 (*fTrackPar)(4,0) *= TMath::Cos((*fTrackPar)(3,0)); // 1/p
204 // Evaluate covariance (and weight) matrix
208 fParExtrap = new TObjArray(15);
209 fParFilter = new TObjArray(15);
210 fCovExtrap = new TObjArray(15);
211 fCovFilter = new TObjArray(15);
212 fJacob = new TObjArray(15);
213 fSteps = new TArrayD(15);
215 fChi2Array = new TArrayD(13);
219 if (fgDebug < 0 ) return;
220 cout << fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()) << " " << 1/(*fTrackPar)(4,0) << " ";
221 if (fgEventReconstructor->GetRecTrackRefHits()) {
222 // from track ref. hits
223 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetTTRTrack() << "<-->" << ((AliMUONHitForRec*)((*fTrackHitsPtr)[1]))->GetTTRTrack() << " @ " << fStartSegment->GetHitForRec1()->GetChamberNumber() << endl;
226 for (Int_t i=0; i<2; i++) {
227 hit1 = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
228 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit1->GetChamberNumber());
229 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit1->GetHitNumber());
230 cout << clus->GetTrack(1)-1;
231 if (clus->GetTrack(2) != 0) cout << " " << clus->GetTrack(2)-1;
232 if (i == 0) cout << " <--> ";
234 cout << " @ " << fStartSegment->GetHitForRec1()->GetChamberNumber() << endl;
238 //__________________________________________________________________________
239 AliMUONTrackK::~AliMUONTrackK()
244 delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's
245 fTrackHitsPtr = NULL;
248 delete fTrackPar; delete fTrackParNew; delete fCovariance;
252 if (fSteps) delete fSteps;
253 if (fChi2Array) delete fChi2Array;
254 if (fChi2Smooth) delete fChi2Smooth;
255 if (fParSmooth) {fParSmooth->Delete(); delete fParSmooth; }
256 // Delete only matrices not shared by several tracks
257 if (!fParExtrap) return;
260 for (Int_t i=0; i<fNSteps; i++) {
261 //if (fParExtrap->UncheckedAt(i)->GetUniqueID() > 1)
262 // fParExtrap->UncheckedAt(i)->SetUniqueID(fParExtrap->RemoveAt(i)->GetUniqueID()-1);
263 id = fParExtrap->UncheckedAt(i)->GetUniqueID();
265 fParExtrap->UncheckedAt(i)->SetUniqueID(id-1);
266 fParExtrap->RemoveAt(i);
268 //if (fParFilter->UncheckedAt(i)->GetUniqueID() > 1)
269 // fParFilter->UncheckedAt(i)->SetUniqueID(fParFilter->RemoveAt(i)->GetUniqueID()-1);
270 id = fParFilter->UncheckedAt(i)->GetUniqueID();
272 fParFilter->UncheckedAt(i)->SetUniqueID(id-1);
273 fParFilter->RemoveAt(i);
275 //if (fCovExtrap->UncheckedAt(i)->GetUniqueID() > 1)
276 // fCovExtrap->UncheckedAt(i)->SetUniqueID(fCovExtrap->RemoveAt(i)->GetUniqueID()-1);
277 id = fCovExtrap->UncheckedAt(i)->GetUniqueID();
279 fCovExtrap->UncheckedAt(i)->SetUniqueID(id-1);
280 fCovExtrap->RemoveAt(i);
283 //if (fCovFilter->UncheckedAt(i)->GetUniqueID() > 1)
284 // fCovFilter->UncheckedAt(i)->SetUniqueID(fCovFilter->RemoveAt(i)->GetUniqueID()-1);
285 id = fCovFilter->UncheckedAt(i)->GetUniqueID();
287 fCovFilter->UncheckedAt(i)->SetUniqueID(id-1);
288 fCovFilter->RemoveAt(i);
290 //if (fJacob->UncheckedAt(i)->GetUniqueID() > 1)
291 // fJacob->UncheckedAt(i)->SetUniqueID(fJacob->RemoveAt(i)->GetUniqueID()-1);
292 id = fJacob->UncheckedAt(i)->GetUniqueID();
294 fJacob->UncheckedAt(i)->SetUniqueID(id-1);
299 for (Int_t i=0; i<fNSteps; i++) {
300 if (fParExtrap->UncheckedAt(i)) ((TMatrixD*)fParExtrap->UncheckedAt(i))->Delete();
301 if (fParFilter->UncheckedAt(i)) ((TMatrixD*)fParFilter->UncheckedAt(i))->Delete();
302 if (fCovExtrap->UncheckedAt(i)) ((TMatrixD*)fCovExtrap->UncheckedAt(i))->Delete();
303 cout << fCovFilter->UncheckedAt(i) << " " << (*fSteps)[i] << endl;
304 if (fCovFilter->UncheckedAt(i)) ((TMatrixD*)fCovFilter->UncheckedAt(i))->Delete();
305 if (fJacob->UncheckedAt(i)) ((TMatrixD*)fJacob->UncheckedAt(i))->Delete();
308 fParExtrap->Delete(); fParFilter->Delete();
309 fCovExtrap->Delete(); fCovFilter->Delete();
311 delete fParExtrap; delete fParFilter;
312 delete fCovExtrap; delete fCovFilter;
316 //__________________________________________________________________________
317 AliMUONTrackK::AliMUONTrackK (const AliMUONTrackK& source)
318 //AZ: TObject(source)
319 : AliMUONTrack(source)
321 // Protected copy constructor
322 AliFatal("Not implemented.");
325 //__________________________________________________________________________
326 AliMUONTrackK & AliMUONTrackK::operator=(const AliMUONTrackK& source)
328 // Assignment operator
330 if(&source == this) return *this;
332 // base class assignement
333 //AZ TObject::operator=(source);
334 AliMUONTrack::operator=(source);
336 fStartSegment = source.fStartSegment;
337 fNTrackHits = source.fNTrackHits;
338 fChi2 = source.fChi2;
339 fPosition = source.fPosition;
340 fPositionNew = source.fPositionNew;
341 fTrackDir = source.fTrackDir;
342 fBPFlag = source.fBPFlag;
343 fRecover = source.fRecover;
344 fSkipHit = source.fSkipHit;
347 fTrackHitsPtr = new TObjArray(*source.fTrackHitsPtr);
348 //source.fTrackHitsPtr->Dump();
349 //fTrackHitsPtr->Dump();
351 fTrackPar = new TMatrixD(*source.fTrackPar); // track parameters
352 fTrackParNew = new TMatrixD(*source.fTrackParNew); // track parameters
353 fCovariance = new TMatrixD(*source.fCovariance); // covariance matrix
354 fWeight = new TMatrixD(*source.fWeight); // weight matrix (inverse of covariance)
357 fParExtrap = new TObjArray(*source.fParExtrap);
358 fParFilter = new TObjArray(*source.fParFilter);
359 fCovExtrap = new TObjArray(*source.fCovExtrap);
360 fCovFilter = new TObjArray(*source.fCovFilter);
361 fJacob = new TObjArray(*source.fJacob);
362 fSteps = new TArrayD(*source.fSteps);
363 fNSteps = source.fNSteps;
365 if (source.fChi2Array) fChi2Array = new TArrayD(*source.fChi2Array);
369 for (Int_t i=0; i<fParExtrap->GetEntriesFast(); i++) {
370 fParExtrap->UncheckedAt(i)->SetUniqueID(fParExtrap->UncheckedAt(i)->GetUniqueID()+1);
371 fParFilter->UncheckedAt(i)->SetUniqueID(fParFilter->UncheckedAt(i)->GetUniqueID()+1);
372 fCovExtrap->UncheckedAt(i)->SetUniqueID(fCovExtrap->UncheckedAt(i)->GetUniqueID()+1);
373 fCovFilter->UncheckedAt(i)->SetUniqueID(fCovFilter->UncheckedAt(i)->GetUniqueID()+1);
374 fJacob->UncheckedAt(i)->SetUniqueID(fJacob->UncheckedAt(i)->GetUniqueID()+1);
379 //__________________________________________________________________________
380 void AliMUONTrackK::EvalCovariance(Double_t dZ)
382 // Evaluate covariance (and weight) matrix for track candidate
383 Double_t sigmaB, sigmaNonB, tanA, tanB, dAdY, rad, dBdX, dBdY;
385 sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution
386 sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution
388 (*fWeight)(0,0) = sigmaB*sigmaB; // <yy>
390 (*fWeight)(1,1) = sigmaNonB*sigmaNonB; // <xx>
392 tanA = TMath::Tan((*fTrackPar)(2,0));
393 dAdY = 1/(1+tanA*tanA)/dZ;
394 (*fWeight)(2,2) = dAdY*dAdY*(*fWeight)(0,0)*2; // <aa>
395 (*fWeight)(0,2) = dAdY*(*fWeight)(0,0); // <ya>
396 (*fWeight)(2,0) = (*fWeight)(0,2);
398 rad = dZ/TMath::Cos((*fTrackPar)(2,0));
399 tanB = TMath::Tan((*fTrackPar)(3,0));
400 dBdX = 1/(1+tanB*tanB)/rad;
402 (*fWeight)(3,3) = dBdX*dBdX*(*fWeight)(1,1)*2; // <bb>
403 (*fWeight)(1,3) = dBdX*(*fWeight)(1,1); // <xb>
404 (*fWeight)(3,1) = (*fWeight)(1,3);
406 //(*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.2)*((*fTrackPar)(4,0)*0.2); // error 20%
407 (*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.5)*((*fTrackPar)(4,0)*0.5); // error 50%
409 // check whether the Invert method returns flag if matrix cannot be inverted,
410 // and do not calculate the Determinant in that case !!!!
411 if (fWeight->Determinant() != 0) {
412 // fWeight->Invert();
414 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
416 AliWarning(" Determinant fWeight=0:");
421 //__________________________________________________________________________
422 Bool_t AliMUONTrackK::KalmanFilter(Int_t ichamBeg, Int_t ichamEnd, Bool_t Back, Double_t zDipole1, Double_t zDipole2)
424 // Follows track through detector stations
425 Bool_t miss, success;
426 Int_t ichamb, iFB, iMin, iMax, dChamb, ichambOK;
427 Int_t ihit, firstIndx, lastIndx, currIndx;
428 Double_t zEnd, dChi2;
429 AliMUONHitForRec *hitAdd, *firstHit, *lastHit, *hit;
430 AliMUONRawCluster *clus;
431 TClonesArray *rawclusters;
432 hit = 0; clus = 0; rawclusters = 0;
434 miss = success = kTRUE;
436 iFB = (ichamEnd == ichamBeg) ? fTrackDir : TMath::Sign(1,ichamEnd-ichamBeg);
437 iMin = TMath::Min(ichamEnd,ichamBeg);
438 iMax = TMath::Max(ichamEnd,ichamBeg);
445 if (((AliMUONHitForRec*)fTrackHitsPtr->First())->GetChamberNumber() != ichamb) currIndx = 0;
446 } else if (fRecover) {
447 hit = GetHitLastOk();
448 currIndx = fTrackHitsPtr->IndexOf(hit);
449 if (currIndx < 0) hit = fStartSegment->GetHitForRec1(); // for station 3
451 ichamb = hit->GetChamberNumber();
452 if (hit == fSkipHit || fRecover == 2 && currIndx >= 0) {
453 // start from the last point or outlier
454 // remove the skipped hit
455 fTrackHitsPtr->Remove(fSkipHit); // remove hit
457 fSkipHit->SetNTrackHits(fSkipHit->GetNTrackHits()-1); // unmark hit
462 ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber();
463 //if (ichambOK >= 8 && ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber() == 6) ichambOK = 6;
464 currIndx = fgHitForRec->IndexOf(fSkipHit);
467 fTrackHitsPtr->Compress();
469 } // if (hit == fSkipHit)
470 else if (currIndx < 0) currIndx = fTrackHitsPtr->IndexOf(hit);
471 } // else if (fRecover)
473 // Get indices of the 1'st and last hits on the track candidate
474 firstHit = (AliMUONHitForRec*) fTrackHitsPtr->First();
475 lastHit = (AliMUONHitForRec*) fTrackHitsPtr->Last();
476 firstIndx = fgHitForRec->IndexOf(firstHit);
477 lastIndx = fgHitForRec->IndexOf(lastHit);
478 currIndx = TMath::Abs (TMath::Max(firstIndx*iFB,lastIndx*iFB));
481 while (ichamb>=iMin && ichamb<=iMax) {
482 // Find the closest hit in Z, not belonging to the current plane
485 if (currIndx < fNTrackHits) {
486 hitAdd = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(currIndx);
487 zEnd = hitAdd->GetZ();
488 //AZ(z->-z) } else zEnd = -9999;
491 //AZ(Z->-Z) zEnd = -9999;
493 for (ihit=currIndx+iFB; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
494 hitAdd = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
495 //if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.1) {
496 if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.5) {
497 zEnd = hitAdd->GetZ();
503 //AZ(Z->-Z) if (zEnd<-999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation
504 if (zEnd>999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation
506 // Check if there is a chamber without hits
507 if (zEnd>999 || TMath::Abs(hitAdd->GetChamberNumber()-ichamb) > 1) {
508 if (!Back && zEnd<999) currIndx -= iFB;
510 zEnd = (&(fgMUON->Chamber(ichamb)))->Z();
513 ichamb = hitAdd->GetChamberNumber();
517 if (ichamb<iMin || ichamb>iMax) break;
518 // Check for missing station
520 dChamb = TMath::Abs(ichamb-ichambOK);
521 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << endl;
522 Int_t dStatMiss = TMath::Abs (ichamb/2 - ichambOK/2);
523 if (zEnd > 999) dStatMiss++;
525 // missing station - abandon track
526 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl;
528 for (Int_t i1=0; i1<fgNOfPoints; i1++) {
529 cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " ";
530 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " ";
531 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " ";
532 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " ";
533 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTTRTrack() << endl;
536 cout << fNTrackHits << endl;
537 for (Int_t i1=0; i1<fNTrackHits; i1++) {
538 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
539 printf(" * %d %10.4f %10.4f %10.4f",
540 hit->GetChamberNumber(), hit->GetBendingCoor(),
541 hit->GetNonBendingCoor(), hit->GetZ());
542 if (fgEventReconstructor->GetRecTrackRefHits()) {
543 // from track ref. hits
544 printf(" %3d %3d \n", hit->GetTrackRefSignal(), hit->GetTTRTrack());
547 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
548 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
549 printf("%3d", clus->GetTrack(1)-1);
550 if (clus->GetTrack(2) != 0) printf("%3d \n", clus->GetTrack(2)-1);
554 } // if (fgDebug >= 10)
555 if (fNTrackHits>2 && fRecover==0) Recover(); // try to recover track later
557 } // if (dStatMiss > 1)
559 if (endOfProp != 0) break;
561 // propagate to the found Z
563 // Check if track steps into dipole
564 //AZ(z->-z) if (fPosition>zDipole2 && zEnd<zDipole2) {
565 if (fPosition<zDipole2 && zEnd>zDipole2) {
566 //LinearPropagation(zDipole2-zBeg);
567 ParPropagation(zDipole2);
568 MSThin(1); // multiple scattering in the chamber
569 WeightPropagation(zDipole2, kTRUE); // propagate weight matrix
570 fPosition = fPositionNew;
571 *fTrackPar = *fTrackParNew;
572 //MagnetPropagation(zEnd);
573 ParPropagation(zEnd);
574 WeightPropagation(zEnd, kTRUE);
575 fPosition = fPositionNew;
577 // Check if track steps out of dipole
578 //AZ(z->-z) else if (fPosition>zDipole1 && zEnd<zDipole1) {
579 else if (fPosition<zDipole1 && zEnd>zDipole1) {
580 //MagnetPropagation(zDipole1-zBeg);
581 ParPropagation(zDipole1);
582 MSThin(1); // multiple scattering in the chamber
583 WeightPropagation(zDipole1, kTRUE);
584 fPosition = fPositionNew;
585 *fTrackPar = *fTrackParNew;
586 //LinearPropagation(zEnd-zDipole1);
587 ParPropagation(zEnd);
588 WeightPropagation(zEnd, kTRUE);
589 fPosition = fPositionNew;
591 ParPropagation(zEnd);
592 //MSThin(1); // multiple scattering in the chamber
593 if (TMath::Abs(zEnd-fPosition) > 5) MSThin(1); // multiple scattering in the chamber
594 WeightPropagation(zEnd, kTRUE);
595 fPosition = fPositionNew;
599 if (fRecover != 0 && hitAdd == fSkipHit && !miss) {
600 // recovered track - remove the hit
602 ichamb = fSkipHit->GetChamberNumber();
603 // remove the skipped hit
604 fTrackHitsPtr->Remove(fSkipHit);
606 fSkipHit->SetNTrackHits(fSkipHit->GetNTrackHits()-1); // unmark hit
609 ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber();
610 currIndx = fgHitForRec->IndexOf(fSkipHit);
614 // backward propagator
616 TMatrixD pointWeight(fgkSize,fgkSize);
617 TMatrixD point(fgkSize,1);
618 TMatrixD trackParTmp = point;
619 point(0,0) = hitAdd->GetBendingCoor();
620 point(1,0) = hitAdd->GetNonBendingCoor();
621 pointWeight(0,0) = 1/hitAdd->GetBendingReso2();
622 pointWeight(1,1) = 1/hitAdd->GetNonBendingReso2();
623 TryPoint(point,pointWeight,trackParTmp,dChi2);
624 *fTrackPar = trackParTmp;
625 *fWeight += pointWeight;
626 //AZ(z->-z) if (fTrackDir < 0) AddMatrices (this, dChi2, hitAdd);
627 if (fTrackDir > 0) AddMatrices (this, dChi2, hitAdd);
628 fChi2 += dChi2; // Chi2
629 } else *fTrackPar = *fTrackParNew; // adjust end point to the last hit
630 if (ichamb==ichamEnd) break;
633 // forward propagator
634 if (miss || !FindPoint(ichamb,zEnd,currIndx,iFB,hitAdd)) {
636 *fTrackPar = *fTrackParNew;
639 fTrackHitsPtr->Add(hitAdd); // add hit
641 hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()+1); // mark hit as being on track
643 currIndx = fgHitForRec->IndexOf(hitAdd); // Check
647 if (fgDebug > 0) cout << fNTrackHits << " " << fChi2 << " " << 1/(*fTrackPar)(4,0) << " " << fPosition << endl;
648 if (1/TMath::Abs((*fTrackPar)(4,0)) < fgEventReconstructor->GetMinBendingMomentum()) success = kFALSE; // p < p_min
652 //__________________________________________________________________________
653 void AliMUONTrackK::ParPropagation(Double_t zEnd)
655 // Propagation of track parameters to zEnd
657 Double_t dZ, step, distance, charge;
658 Double_t vGeant3[7], vGeant3New[7];
661 // First step using linear extrapolation
662 dZ = zEnd - fPosition;
663 fPositionNew = fPosition;
664 *fTrackParNew = *fTrackPar;
665 if (dZ == 0) return; //AZ ???
666 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
667 step = dZ/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)); // linear estimate
668 //AZ(z->-z) charge = iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0));
669 charge = -iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0));
670 SetGeantParam(vGeant3,iFB);
674 step = TMath::Abs(step);
675 // Propagate parameters
676 extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
677 distance = zEnd - vGeant3New[2];
678 step *= dZ/(vGeant3New[2]-fPositionNew);
680 } while (distance*iFB < 0 && TMath::Abs(distance) > fgkEpsilon);
682 GetFromGeantParam(vGeant3New,iFB);
684 // Position adjustment (until within tolerance)
685 while (TMath::Abs(distance) > fgkEpsilon) {
686 dZ = zEnd - fPositionNew;
687 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
688 step = dZ/TMath::Cos((*fTrackParNew)(2,0))/TMath::Cos((*fTrackParNew)(3,0));
689 step = TMath::Abs(step);
690 SetGeantParam(vGeant3,iFB);
693 // Propagate parameters
694 extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
695 distance = zEnd - vGeant3New[2];
698 if (nTries > fgkTriesMax) {
699 cout << " ***** ParPropagation: too many tries " << nTries << endl;
700 AliFatal("Too many tries.");
702 } while (distance*iFB < 0);
704 GetFromGeantParam(vGeant3New,iFB);
706 //cout << nTries << endl;
710 //__________________________________________________________________________
711 void AliMUONTrackK::WeightPropagation(void)
713 // Propagation of the weight matrix
714 // W = DtWD, where D is Jacobian
716 // !!! not implemented TMatrixD weight1(*fJacob,TMatrixD::kAtBA,*fWeight); // DtWD
717 TMatrixD weight1(*fWeight,TMatrixD::kMult,*fJacob); // WD
718 *fWeight = TMatrixD(*fJacob,TMatrixD::kTransposeMult,weight1); // DtWD
722 //__________________________________________________________________________
723 void AliMUONTrackK::WeightPropagation(Double_t zEnd, Bool_t smooth)
725 // Propagation of the weight matrix
726 // W = DtWD, where D is Jacobian
730 TMatrixD jacob(fgkSize,fgkSize);
733 // Save initial and propagated parameters
734 TMatrixD trackPar0 = *fTrackPar;
735 TMatrixD trackParNew0 = *fTrackParNew;
736 Double_t savePosition = fPositionNew;
738 // Get covariance matrix
739 *fCovariance = *fWeight;
740 // check whether the Invert method returns flag if matrix cannot be inverted,
741 // and do not calculate the Determinant in that case !!!!
742 if (fCovariance->Determinant() != 0) {
743 // fCovariance->Invert();
745 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
747 AliWarning(" Determinant fCovariance=0:");
750 // Loop over parameters to find change of the initial vs propagated ones
752 fPosition = fPositionNew;
753 for (i=0; i<fgkSize; i++) {
754 dPar = TMath::Sqrt((*fCovariance)(i,i));
755 *fTrackPar = trackParNew0;
756 (*fTrackPar)(i,0) += dPar;
757 ParPropagation(zEnd);
758 for (j=0; j<fgkSize; j++) {
759 jacob(j,i) = ((*fTrackParNew)(j,0)-trackPar0(j,0))/dPar;
764 //trackParNew0.Print();
765 //TMatrixD par1(jacob,TMatrixD::kMult,trackPar0); //
768 if (jacob.Determinant() != 0) {
771 cout << " ***** Warning in WeightPropagation: Determinant jacob=0:" << endl;
774 TMatrixD weight1(*fWeight,TMatrixD::kMult,jacob); // WD
775 *fWeight = TMatrixD(jacob,TMatrixD::kTransposeMult,weight1); // DtWD
778 // Restore initial and propagated parameters
779 *fTrackPar = trackPar0;
780 *fTrackParNew = trackParNew0;
782 fPositionNew = savePosition;
785 if (!smooth) return; // do not use smoother
786 //AZ(z->-z) if (fTrackDir > 0) return; // only for propagation towards int. point
787 if (fTrackDir < 0) return; // only for propagation towards int. point
788 TMatrixD *tmp = new TMatrixD(*fTrackParNew); // extrapolated parameters
789 fParExtrap->Add(tmp);
791 tmp = new TMatrixD(*fTrackParNew); // filtered parameters (if no measurement will be found)
792 fParFilter->Add(tmp);
794 *fCovariance = *fWeight;
795 if (fCovariance->Determinant() != 0) {
797 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
799 AliWarning(" Determinant fCovariance=0:");
801 tmp = new TMatrixD(*fCovariance); // extrapolated covariance
802 fCovExtrap->Add(tmp);
804 tmp = new TMatrixD(*fCovariance); // filtered covariance (if no measurement will be found)
805 fCovFilter->Add(tmp);
807 tmp = new TMatrixD(jacob); // Jacobian
811 if (fSteps->fN <= fNSteps) fSteps->Set(fSteps->fN+10);
812 fSteps->AddAt(fPositionNew,fNSteps++);
813 if (fgDebug > 0) cout << " WeightPropagation " << fNSteps << " " << fPositionNew << endl;
817 //__________________________________________________________________________
818 Bool_t AliMUONTrackK::FindPoint(Int_t ichamb, Double_t zEnd, Int_t currIndx, Int_t iFB, AliMUONHitForRec *&hitAdd)
820 // Picks up point within a window for the chamber No ichamb
821 // Split the track if there are more than 1 hit
822 Int_t ihit, nRecTracks;
823 Double_t windowB, windowNonB, dChi2Tmp=0, dChi2, y, x, savePosition=0;
824 TClonesArray *trackPtr;
825 AliMUONHitForRec *hit, *hitLoop;
826 AliMUONTrackK *trackK;
829 //sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution
830 //sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution
831 *fCovariance = *fWeight;
832 // check whether the Invert method returns flag if matrix cannot be inverted,
833 // and do not calculate the Determinant in that case !!!!
834 if (fCovariance->Determinant() != 0) {
835 // fCovariance->Invert();
837 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
839 AliWarning("Determinant fCovariance=0:");
841 //windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+sigmaB*sigmaB);
842 //windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+sigmaNonB*sigmaNonB);
843 // Loop over all hits and take hits from the chamber
844 TMatrixD pointWeight(fgkSize,fgkSize);
845 TMatrixD saveWeight = pointWeight;
846 TMatrixD pointWeightTmp = pointWeight;
847 TMatrixD point(fgkSize,1);
848 TMatrixD trackPar = point;
849 TMatrixD trackParTmp = point;
852 zLast = ((AliMUONHitForRec*)fTrackHitsPtr->Last())->GetZ();
854 for (ihit=currIndx; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
855 hit = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
856 if (hit->GetChamberNumber() == ichamb) {
857 //if (TMath::Abs(hit->GetZ()-zEnd) < 0.1) {
858 if (TMath::Abs(hit->GetZ()-zEnd) < 0.5) {
859 if (TMath::Abs(hit->GetZ()-zEnd) > 0.1) {
860 // adjust position: for multiple hits in the chamber
861 // (mostly (only?) for GEANT hits)
863 *fTrackPar = *fTrackParNew;
864 ParPropagation(zEnd);
865 WeightPropagation(zEnd, kTRUE);
866 fPosition = fPositionNew;
867 *fTrackPar = *fTrackParNew;
869 *fCovariance = *fWeight;
870 if (fCovariance->Determinant() != 0) {
871 //fCovariance->Invert();
873 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
875 AliWarning("Determinant fCovariance=0:" );
878 y = hit->GetBendingCoor();
879 x = hit->GetNonBendingCoor();
880 windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
881 windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
882 //fprintf(lun1,"%3d %10.4f %10.4f %10.4f \n", ichamb, windowB, windowNonB, TMath::Abs(hit->GetZ()-zLast));
884 windowB = TMath::Min (windowB,5.);
886 if (TMath::Abs(hit->GetZ()-zLast) < 50) {
887 windowB = TMath::Min (windowB,0.5);
888 windowNonB = TMath::Min (windowNonB,3.);
889 } else if (TMath::Abs(hit->GetZ()-zLast) < 200) {
890 windowB = TMath::Min (windowB,1.5);
891 windowNonB = TMath::Min (windowNonB,3.);
892 } else if (TMath::Abs(hit->GetZ()-zLast) < 350) {
893 windowB = TMath::Min (windowB,4.);
894 windowNonB = TMath::Min (windowNonB,6.);
900 if (TMath::Abs(hit->GetZ()-zLast) < 50) {
901 windowB = 5*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
902 windowNonB = 5*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
904 windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
905 windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
909 //cout << TMath::Abs((*fTrackParNew)(0,0)-y) << " " << windowB << " " << TMath::Abs((*fTrackParNew)(1,0)-x) << " " << windowNonB << " " << zEnd << endl;
910 if (TMath::Abs((*fTrackParNew)(0,0)-y) <= windowB &&
911 TMath::Abs((*fTrackParNew)(1,0)-x) <= windowNonB) {
912 //if (TMath::Abs((*fTrackParNew)(0,0)-y) <= windowB &&
913 // TMath::Abs((*fTrackParNew)(1,0)-x) <= windowNonB &&
914 // hit->GetTrackRefSignal() == 1) { // just for test
915 // Vector of measurements and covariance matrix
919 pointWeight(0,0) = 1/hit->GetBendingReso2();
920 pointWeight(1,1) = 1/hit->GetNonBendingReso2();
921 TryPoint(point,pointWeight,trackPar,dChi2);
922 if (TMath::Abs(1./(trackPar)(4,0)) < fgEventReconstructor->GetMinBendingMomentum()) continue; // p < p_min - next hit
925 //if (nHitsOK > -1) {
927 // Save current members
928 saveWeight = *fWeight;
929 savePosition = fPosition;
930 // temporary storage for the current track
932 trackParTmp = trackPar;
933 pointWeightTmp = pointWeight;
936 // branching: create a new track
937 trackPtr = fgEventReconstructor->GetRecTracksPtr();
938 nRecTracks = fgEventReconstructor->GetNRecTracks();
939 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
941 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
942 if (fgDebug > 0) cout << " ******** New track: " << ichamb << " " << hit->GetTTRTrack() << " " << 1/(trackPar)(4,0) << " " << hit->GetBendingCoor() << " " << hit->GetNonBendingCoor() << " " << fNTrackHits << " " << nRecTracks << endl;
943 trackK->fRecover = 0;
944 *(trackK->fTrackPar) = trackPar;
945 *(trackK->fWeight) += pointWeight;
946 trackK->fChi2 += dChi2;
949 *(trackK->fCovariance) = *(trackK->fWeight);
950 if (trackK->fCovariance->Determinant() != 0) {
952 mnvertLocalK(&((*(trackK->fCovariance))(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
954 cout << (*(trackK->fCovariance))(0,0) << " " << (*(trackK->fCovariance))(1,1) << " " << (*fCovariance)(0,0) << " " << (*fCovariance)(1,1) << endl;
956 // Add filtered matrices for the smoother
957 //AZ(z->-z) if (fTrackDir < 0) {
959 if (nHitsOK > 2) { // check for position adjustment
960 for (Int_t i=trackK->fNSteps-1; i>=0; i--) {
961 if (TMath::Abs(hit->GetZ()-(*trackK->fSteps)[i]) > 0.1) {
962 //if (TMath::Abs(hit->GetZ()-(trackK->fSteps)[i]) > 0.1) {
963 RemoveMatrices(trackK);
964 cout << " *** Position adjustment 1 " << hit->GetZ() << " "
965 << (*trackK->fSteps)[i] << endl;
966 AliFatal("Position adjustment 1.");
971 AddMatrices (trackK, dChi2, hit);
973 // Mark hits as being on 2 tracks
974 for (Int_t i=0; i<fNTrackHits; i++) {
975 hitLoop = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
976 hitLoop->SetNTrackHits(hitLoop->GetNTrackHits()+1);
979 cout << hitLoop->GetChamberNumber() << " ";
980 cout << hitLoop->GetBendingCoor() << " ";
981 cout << hitLoop->GetNonBendingCoor() << " ";
982 cout << hitLoop->GetZ() << " " << " ";
983 cout << hitLoop->GetTrackRefSignal() << " " << " ";
984 cout << hitLoop->GetTTRTrack() << endl;
985 printf(" ** %d %10.4f %10.4f %10.4f %d %d \n",
986 hitLoop->GetChamberNumber(), hitLoop->GetBendingCoor(),
987 hitLoop->GetNonBendingCoor(), hitLoop->GetZ(),
988 hitLoop->GetTrackRefSignal(), hitLoop->GetTTRTrack());
992 trackK->fTrackHitsPtr->Add(hit); // add hit
993 trackK->fNTrackHits ++;
994 hit->SetNTrackHits(hit->GetNTrackHits()+1); // mark hit as being on track
997 //AZ(z->-z) trackK->fTrackDir = -1;
998 trackK->fTrackDir = 1;
999 trackK->fBPFlag = kTRUE;
1004 } else break; // different chamber
1005 } // for (ihit=currIndx;
1008 *fTrackPar = trackParTmp;
1009 *fWeight = saveWeight;
1010 *fWeight += pointWeightTmp;
1011 fChi2 += dChi2Tmp; // Chi2
1012 fPosition = savePosition;
1013 // Add filtered matrices for the smoother
1014 //AZ(z->-z) if (fTrackDir < 0) {
1015 if (fTrackDir > 0) {
1016 for (Int_t i=fNSteps-1; i>=0; i--) {
1017 if (TMath::Abs(fPosition-(*fSteps)[i]) > 0.1) {
1018 //if (TMath::Abs(fPosition-fSteps[i]) > 0.1) {
1019 RemoveMatrices(this);
1020 if (fgDebug > 1) cout << " *** Position adjustment 2 " << fPosition << " " << (*fSteps)[i] << endl;
1023 } // for (Int_t i=fNSteps-1;
1024 AddMatrices (this, dChi2Tmp, hitAdd);
1027 for (Int_t i=0; i<fNSteps; i++) cout << (*fSteps)[i] << " "; cout << endl;
1028 for (Int_t i=0; i<trackK->fNSteps; i++) cout << (*trackK->fSteps)[i] << " "; cout << endl;
1031 } // if (fTrackDir > 0)
1036 //__________________________________________________________________________
1037 void AliMUONTrackK::TryPoint(TMatrixD &point, const TMatrixD &pointWeight, TMatrixD &trackParTmp, Double_t &dChi2)
1039 // Adds a measurement point (modifies track parameters and computes
1042 // Solving linear system (W+U)p' = U(m-p) + (W+U)p
1043 TMatrixD wu = *fWeight;
1044 wu += pointWeight; // W+U
1045 trackParTmp = point;
1046 trackParTmp -= *fTrackParNew; // m-p
1047 TMatrixD right(pointWeight,TMatrixD::kMult,trackParTmp); // U(m-p)
1048 TMatrixD right1(wu,TMatrixD::kMult,*fTrackParNew); // (W+U)p
1049 right += right1; // U(m-p) + (W+U)p
1051 // check whether the Invert method returns flag if matrix cannot be inverted,
1052 // and do not calculate the Determinant in that case !!!!
1053 if (wu.Determinant() != 0) {
1056 mnvertLocalK(&((wu)(0,0)), fgkSize,fgkSize,fgkSize,ifailWU);
1058 AliWarning("Determinant wu=0:");
1060 trackParTmp = TMatrixD(wu,TMatrixD::kMult,right);
1062 right1 = trackParTmp;
1063 right1 -= point; // p'-m
1064 point = trackParTmp;
1065 point -= *fTrackParNew; // p'-p
1066 right = TMatrixD(*fWeight,TMatrixD::kMult,point); // W(p'-p)
1067 TMatrixD value(point,TMatrixD::kTransposeMult,right); // (p'-p)'W(p'-p)
1069 right = TMatrixD(pointWeight,TMatrixD::kMult,right1); // U(p'-m)
1070 value = TMatrixD(right1,TMatrixD::kTransposeMult,right); // (p'-m)'U(p'-m)
1071 dChi2 += value(0,0);
1075 //__________________________________________________________________________
1076 void AliMUONTrackK::MSThin(Int_t sign)
1078 // Adds multiple scattering in a thin layer (only angles are affected)
1079 Double_t cosAlph, cosBeta, momentum, velo, path, theta0;
1081 // check whether the Invert method returns flag if matrix cannot be inverted,
1082 // and do not calculate the Determinant in that case !!!!
1083 if (fWeight->Determinant() != 0) {
1084 //fWeight->Invert(); // covariance
1087 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
1089 AliWarning("Determinant fWeight=0:");
1092 cosAlph = TMath::Cos((*fTrackParNew)(2,0));
1093 cosBeta = TMath::Cos((*fTrackParNew)(3,0));
1094 momentum = 1/(*fTrackParNew)(4,0); // particle momentum
1095 //velo = momentum/TMath::Sqrt(momentum*momentum+muonMass*muonMass); // velocity/c for muon hypothesis
1096 velo = 1; // relativistic
1097 path = TMath::Abs(fgEventReconstructor->GetChamberThicknessInX0()/cosAlph/cosBeta); // path length
1098 theta0 = 0.0136/velo/momentum*TMath::Sqrt(path)*(1+0.038*TMath::Log(path)); // projected scattering angle
1100 (*fWeight)(2,2) += sign*theta0/cosBeta*theta0/cosBeta; // alpha
1101 (*fWeight)(3,3) += sign*theta0*theta0; // beta
1102 //fWeight->Invert(); // weight
1105 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
1109 //__________________________________________________________________________
1110 void AliMUONTrackK::StartBack(void)
1112 // Starts backpropagator
1116 for (Int_t i=0; i<fgkSize; i++) {
1117 for (Int_t j=0; j<fgkSize; j++) {
1118 if (j==i) (*fWeight)(i,i) /= 100;
1119 //if (j==i) (*fWeight)(i,i) /= fNTrackHits*fNTrackHits;
1120 else (*fWeight)(j,i) = 0;
1123 // Sort hits on track in descending order in abs(z)
1124 SortHits(0, fTrackHitsPtr);
1127 //__________________________________________________________________________
1128 void AliMUONTrackK::SortHits(Int_t iflag, TObjArray *array)
1130 // Sort hits in Z if the seed segment in the last but one station
1131 // (if iflag==0 in descending order in abs(z), if !=0 - unsort)
1133 if (iflag && ((AliMUONHitForRec*)(array->UncheckedAt(0)))->GetChamberNumber() == 6) return;
1134 Double_t z = 0, zmax = TMath::Abs(((AliMUONHitForRec*)(array->UncheckedAt(0)))->GetZ());
1135 Int_t i = 1, entries = array->GetEntriesFast();
1136 for ( ; i<entries; i++) {
1138 if (((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetChamberNumber() == 6) break;
1140 z = TMath::Abs(((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetZ());
1141 if (z < zmax) break;
1143 if (fgDebug >= 10) cout << " " << zmax << " " << z << " " << i << endl;
1147 for (Int_t j=0; j<=(i-1)/2; j++) {
1148 TObject *hit = array->UncheckedAt(j);
1149 array->AddAt(array->UncheckedAt(i-j),j);
1150 array->AddAt(hit,i-j);
1152 if (fgDebug >= 10) {
1153 for (i=0; i<entries; i++)
1154 cout << ((AliMUONHitForRec*)(array->UncheckedAt(i)))->GetZ() << " ";
1155 cout << " - Sort" << endl;
1159 //__________________________________________________________________________
1160 void AliMUONTrackK::SetGeantParam(Double_t *VGeant3, Int_t iFB)
1162 // Set vector of Geant3 parameters pointed to by "VGeant3"
1163 // from track parameters
1165 VGeant3[0] = (*fTrackParNew)(1,0); // X
1166 VGeant3[1] = (*fTrackParNew)(0,0); // Y
1167 VGeant3[2] = fPositionNew; // Z
1168 //AZ(z->-z) VGeant3[3] = iFB*TMath::Sin((*fTrackParNew)(3,0)); // Px/Ptot
1169 //AZ)z->-z) VGeant3[4] = iFB*TMath::Cos((*fTrackParNew)(3,0))*TMath::Sin((*fTrackParNew)(2,0)); // Py/Ptot
1170 VGeant3[3] = -iFB*TMath::Sin((*fTrackParNew)(3,0)); // Px/Ptot
1171 VGeant3[4] = -iFB*TMath::Cos((*fTrackParNew)(3,0))*TMath::Sin((*fTrackParNew)(2,0)); // Py/Ptot
1172 VGeant3[5] = iFB*TMath::Sqrt(1.0-VGeant3[3]*VGeant3[3]-VGeant3[4]*VGeant3[4]); // Pz/Ptot
1173 VGeant3[6] = 1/TMath::Abs((*fTrackParNew)(4,0)); // Ptot
1176 //__________________________________________________________________________
1177 void AliMUONTrackK::GetFromGeantParam(Double_t *VGeant3, Int_t iFB)
1179 // Get track parameters from vector of Geant3 parameters pointed
1182 fPositionNew = VGeant3[2]; // Z
1183 (*fTrackParNew)(0,0) = VGeant3[1]; // Y
1184 (*fTrackParNew)(1,0) = VGeant3[0]; // X
1185 //AZ(z->-z) (*fTrackParNew)(3,0) = TMath::ASin(iFB*VGeant3[3]); // beta
1186 //AZ(z->-z) (*fTrackParNew)(2,0) = TMath::ASin(iFB*VGeant3[4]/TMath::Cos((*fTrackParNew)(3,0))); // alpha
1187 (*fTrackParNew)(3,0) = TMath::ASin(-iFB*VGeant3[3]); // beta
1188 (*fTrackParNew)(2,0) = TMath::ASin(iFB*VGeant3[4]/TMath::Cos((*fTrackParNew)(3,0))) - TMath::Pi(); // alpha
1189 (*fTrackParNew)(4,0) = 1/VGeant3[6]*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0)); // 1/Ptot
1192 //__________________________________________________________________________
1193 void AliMUONTrackK::SetTrackQuality(Int_t iChi2)
1195 // Computes "track quality" from Chi2 (if iChi2==0) or vice versa
1198 cout << " ***** Too high Chi2: " << fChi2 << endl;
1201 if (iChi2 == 0) fChi2 = fNTrackHits + (500.-fChi2)/501;
1202 else fChi2 = 500 - (fChi2-fNTrackHits)*501;
1205 //__________________________________________________________________________
1206 Int_t AliMUONTrackK::Compare(const TObject* trackK) const
1208 // "Compare" function to sort with decreasing "track quality".
1209 // Returns +1 (0, -1) if quality of current track
1210 // is smaller than (equal to, larger than) quality of trackK
1212 if (fChi2 < ((AliMUONTrackK*)trackK)->fChi2) return(+1);
1213 else if (fChi2 == ((AliMUONTrackK*)trackK)->fChi2) return(0);
1217 //__________________________________________________________________________
1218 Bool_t AliMUONTrackK::KeepTrack(AliMUONTrackK* track0) const
1220 // Check whether or not to keep current track
1221 // (keep, if it has less than half of common hits with track0)
1222 Int_t hitsInCommon, nHits0, i, j, nTrackHits2;
1223 AliMUONHitForRec *hit0, *hit1;
1226 nHits0 = track0->fNTrackHits;
1227 nTrackHits2 = fNTrackHits/2;
1229 for (i=0; i<nHits0; i++) {
1230 // Check if hit belongs to several tracks
1231 hit0 = (AliMUONHitForRec*) (*track0->fTrackHitsPtr)[i];
1232 if (hit0->GetNTrackHits() == 1) continue;
1233 for (j=0; j<fNTrackHits; j++) {
1234 hit1 = (AliMUONHitForRec*) (*fTrackHitsPtr)[j];
1235 if (hit1->GetNTrackHits() == 1) continue;
1238 if (hitsInCommon >= nTrackHits2) return kFALSE;
1246 //__________________________________________________________________________
1247 void AliMUONTrackK::Kill(void)
1249 // Kill track candidate
1251 AliMUONHitForRec *hit;
1253 if (fTrackHitsPtr) {
1254 // Remove track mark from hits
1255 for (i=0; i<fNTrackHits; i++) {
1256 hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[i];
1257 hit->SetNTrackHits(hit->GetNTrackHits()-1);
1260 fgEventReconstructor->GetRecTracksPtr()->Remove(this);
1263 //__________________________________________________________________________
1264 void AliMUONTrackK::FillMUONTrack(void)
1266 // Compute track parameters at hit positions (as for AliMUONTrack)
1268 // Set number of hits per track
1269 ((AliMUONTrack*)this)->SetNTrackHits(fNTrackHits);
1271 // Set track parameters at vertex
1272 AliMUONTrackParam trackParam;
1273 SetTrackParam(&trackParam, fTrackPar, fPosition);
1274 ((AliMUONTrack*)this)->SetTrackParamAtVertex(&trackParam);
1276 // Set track parameters at hits
1277 for (Int_t i = fNTrackHits-1; i>=0; i--) {
1278 if ((*fChi2Smooth)[i] < 0) {
1279 // Propagate through last chambers
1280 trackParam.ExtrapToZ(((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetZ());
1283 SetTrackParam(&trackParam, (TMatrixD*)fParSmooth->UncheckedAt(i), ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetZ());
1285 ((AliMUONTrack*)this)->AddTrackParamAtHit(&trackParam);
1289 //__________________________________________________________________________
1290 void AliMUONTrackK::SetTrackParam(AliMUONTrackParam *trackParam, TMatrixD *par, Double_t z)
1292 // Fill AliMUONTrackParam object
1294 trackParam->SetBendingCoor((*par)(0,0));
1295 trackParam->SetNonBendingCoor((*par)(1,0));
1296 trackParam->SetBendingSlope(TMath::Tan((*par)(2,0)));
1297 trackParam->SetNonBendingSlope(TMath::Tan((*par)(3,0))/TMath::Cos((*par)(2,0)));
1298 trackParam->SetInverseBendingMomentum((*par)(4,0)/TMath::Cos((*par)(3,0)));
1299 trackParam->SetZ(z);
1302 //__________________________________________________________________________
1303 void AliMUONTrackK::Branson(void)
1305 // Propagates track to the vertex thru absorber using Branson correction
1306 // (makes use of the AliMUONTrackParam class)
1308 AliMUONTrackParam *trackParam = new AliMUONTrackParam();
1310 trackParam->SetBendingCoor((*fTrackPar)(0,0));
1311 trackParam->SetNonBendingCoor((*fTrackPar)(1,0));
1312 trackParam->SetBendingSlope(TMath::Tan((*fTrackPar)(2,0)));
1313 trackParam->SetNonBendingSlope(TMath::Tan((*fTrackPar)(3,0))/TMath::Cos((*fTrackPar)(2,0)));
1314 trackParam->SetInverseBendingMomentum((*fTrackPar)(4,0)/TMath::Cos((*fTrackPar)(3,0)));
1315 trackParam->SetZ(fPosition);
1317 SetTrackParam(trackParam, fTrackPar, fPosition);
1319 trackParam->ExtrapToVertex(Double_t(0.), Double_t(0.), Double_t(0.));
1321 (*fTrackPar)(0,0) = trackParam->GetBendingCoor();
1322 (*fTrackPar)(1,0) = trackParam->GetNonBendingCoor();
1323 (*fTrackPar)(2,0) = TMath::ATan(trackParam->GetBendingSlope());
1324 (*fTrackPar)(3,0) = TMath::ATan(TMath::Cos((*fTrackPar)(2,0))*trackParam->GetNonBendingSlope());
1325 (*fTrackPar)(4,0) = TMath::Cos((*fTrackPar)(3,0))*trackParam->GetInverseBendingMomentum();
1326 fPosition = trackParam->GetZ();
1328 cout << 1/(*fTrackPar)(4,0) << " " << fPosition << " " << (*fTrackPar)(0,0) << endl;
1330 // Get covariance matrix
1331 *fCovariance = *fWeight;
1332 if (fCovariance->Determinant() != 0) {
1334 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1336 AliWarning("Determinant fCovariance=0:");
1340 //__________________________________________________________________________
1341 void AliMUONTrackK::GoToZ(Double_t zEnd)
1343 // Propagates track to given Z
1345 ParPropagation(zEnd);
1346 MSThin(1); // multiple scattering in the chamber
1347 WeightPropagation(zEnd, kFALSE);
1348 fPosition = fPositionNew;
1349 *fTrackPar = *fTrackParNew;
1352 //__________________________________________________________________________
1353 void AliMUONTrackK::GoToVertex(Int_t iflag)
1356 // Propagates track to the vertex
1357 // All material constants are taken from AliRoot
1359 static Double_t x01[5] = { 24.282, // C
1364 // inner part theta < 3 degrees
1365 static Double_t x02[5] = { 30413, // Air
1370 // z positions of the materials inside the absober outer part theta > 3 degres
1371 static Double_t zPos[10] = {-90, -105, -315, -443, -468};
1373 Double_t dZ, r0Norm, x0, deltaP, dChi2, pTotal, pOld;
1374 AliMUONHitForRec *hit;
1375 AliMUONRawCluster *clus;
1376 TClonesArray *rawclusters;
1378 // First step to the rear end of the absorber
1379 //AZ(z->-z) Double_t zRear = 503;
1380 Double_t zRear = -503;
1382 Double_t tan3 = TMath::Tan(3./180*TMath::Pi());
1384 // Go through absorber
1385 pOld = 1/(*fTrackPar)(4,0);
1386 Double_t r0Rear = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1387 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1388 r0Rear = TMath::Sqrt(r0Rear)/TMath::Abs(fPosition)/tan3;
1390 Double_t p0, cos25, cos60;
1391 if (!iflag) goto vertex;
1393 for (Int_t i=4; i>=0; i--) {
1394 ParPropagation(zPos[i]);
1395 WeightPropagation(zPos[i], kFALSE);
1396 dZ = TMath::Abs (fPositionNew-fPosition);
1397 if (r0Norm > 1) x0 = x01[i];
1399 MSLine(dZ,x0); // multiple scattering in the medium (linear approximation)
1400 fPosition = fPositionNew;
1401 *fTrackPar = *fTrackParNew;
1402 r0Norm = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1403 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1404 r0Norm = TMath::Sqrt(r0Norm)/TMath::Abs(fPosition)/tan3;
1406 // Correct momentum for energy losses
1407 pTotal = 1/TMath::Abs((*fTrackPar)(4,0));
1409 cos25 = TMath::Cos(2.5/180*TMath::Pi());
1410 cos60 = TMath::Cos(6.0/180*TMath::Pi());
1411 for (Int_t j=0; j<1; j++) {
1415 deltaP = 2.164 + 0.145e-1*p0 - 0.417e-3*p0*p0;
1417 deltaP = 2.275 + 0.102e-2*p0 - 0.674e-6*p0*p0;
1421 deltaP = 2.581 + 0.188e-1*p0 - 0.398e-3*p0*p0;
1423 deltaP = 2.727 + 0.356e-2*p0 + 0.242e-5*p0*p0;
1431 deltaP = 2.737 + 0.0494*p0 - 0.001123*p0*p0;
1433 deltaP = 3.0643 + 0.01346*p0;
1439 deltaP = 2.1380 + 0.0351*p0 - 0.000853*p0*p0;
1441 deltaP = 2.407 + 0.00702*p0;
1450 deltaP = 2.439 + 0.806e-1*p0 - 0.500e-2*p0*p0 + 0.106e-3*p0*p0*p0;
1452 deltaP = 2.767 + 0.742e-2*p0 - 0.196e-4*p0*p0 + 0.403e-7*p0*p0*p0;
1459 deltaP = 2.209 + 0.800e-2*p0;
1461 deltaP = 2.285 + 0.141e-2*p0 - 0.446e-6*p0*p0;
1471 deltaP = 2.5938 + 0.0570 * p0 - 0.001151 * p0 * p0;
1473 deltaP = 3.0714 + 0.011767 * p0;
1477 deltaP = 2.1207 + 0.05478 * p0 - 0.00145079 * p0 * p0;
1479 deltaP = 2.6069 + 0.0051705 * p0;
1485 p0 = pTotal + deltaP/TMath::Abs(TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)));
1487 (*fTrackPar)(4,0) = 1/p0*TMath::Sign((Double_t)1.,(*fTrackPar)(4,0));
1491 ParPropagation((Double_t)0.);
1492 WeightPropagation((Double_t)0., kFALSE);
1493 fPosition = fPositionNew;
1494 //*fTrackPar = *fTrackParNew;
1495 // Add vertex as a hit
1496 TMatrixD pointWeight(fgkSize,fgkSize);
1497 TMatrixD point(fgkSize,1);
1498 TMatrixD trackParTmp = point;
1499 point(0,0) = 0; // vertex coordinate - should be taken somewhere
1500 point(1,0) = 0; // vertex coordinate - should be taken somewhere
1501 pointWeight(0,0) = 1/1.e-3/1.e-3; // 10 um error
1502 pointWeight(1,1) = 1/1.e-3/1.e-3; // 10 um error
1503 TryPoint(point,pointWeight,trackParTmp,dChi2);
1504 *fTrackPar = trackParTmp;
1505 *fWeight += pointWeight;
1506 fChi2 += dChi2; // Chi2
1507 if (fgDebug < 0) return; // no output
1509 cout << pOld << " " << 1/(*fTrackPar)(4,0) << " " << dChi2 << " " << fChi2 << " " << fNTrackHits << endl;
1510 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1511 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1512 printf ("%4d", hit->GetChamberNumber());
1516 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1517 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1518 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1519 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1520 printf ("%4d", fgHitForRec->IndexOf(hit));
1524 if (fgEventReconstructor->GetRecTrackRefHits()) {
1525 // from track ref. hits
1526 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1527 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1528 cout << hit->GetTTRTrack() + hit->GetTrackRefSignal()*10000 << " ";
1531 // from raw clusters
1532 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1533 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1534 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
1535 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1536 printf ("%4d", clus->GetTrack(1) - 1);
1539 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1540 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1541 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
1542 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1543 if (clus->GetTrack(2) != 0) printf ("%4d", clus->GetTrack(2) - 1);
1544 else printf ("%4s", " ");
1548 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1549 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1550 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1551 //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " ";
1554 for (Int_t i1=0; i1<fNTrackHits; i1++) printf("%8.4f", (*fChi2Smooth)[i1]);
1556 cout << "---------------------------------------------------" << endl;
1558 // Get covariance matrix
1559 /* Not needed - covariance matrix is not interesting to anybody
1560 *fCovariance = *fWeight;
1561 if (fCovariance->Determinant() != 0) {
1562 // fCovariance->Invert();
1564 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1566 AliWarning("Determinant fCovariance=0:" );
1571 //__________________________________________________________________________
1572 void AliMUONTrackK::MSLine(Double_t dZ, Double_t x0)
1574 // Adds multiple scattering in a thick layer for linear propagation
1576 Double_t cosAlph = TMath::Cos((*fTrackPar)(2,0));
1577 Double_t tanAlph = TMath::Tan((*fTrackPar)(2,0));
1578 Double_t cosBeta = TMath::Cos((*fTrackPar)(3,0));
1580 sinBeta = TMath::Sin((*fTrackPar)(3,0));
1581 Double_t tanBeta = TMath::Tan((*fTrackPar)(3,0));
1582 Double_t momentum = 1/(*fTrackPar)(4,0);
1583 Double_t velo = 1; // relativistic velocity
1584 Double_t step = TMath::Abs(dZ/cosAlph/cosBeta); // step length
1586 // Projected scattering angle
1587 Double_t theta0 = 0.0136/velo/momentum/TMath::Sqrt(x0)*(1+0.038*TMath::Log(step/x0));
1588 Double_t theta02 = theta0*theta0;
1589 Double_t dl2 = step*step/2*theta02;
1590 Double_t dl3 = dl2*step*2/3;
1593 Double_t dYdT = 1/cosAlph;
1594 Double_t dYdB = 0; //(*fTrackPar)(2,0)*sinBeta/cosAlph;
1595 Double_t dXdT = tanAlph*tanBeta;
1596 //Double_t dXdB = (1+(*fTrackPar)(2,0)*tanAlph*sinBeta*sinBeta)/cosBeta;
1597 Double_t dXdB = 1/cosBeta;
1598 Double_t dAdT = 1/cosBeta;
1599 Double_t dAdB = 0; //(*fTrackPar)(2,0)*tanBeta;
1601 // Get covariance matrix
1602 *fCovariance = *fWeight;
1603 if (fCovariance->Determinant() != 0) {
1604 // fCovariance->Invert();
1606 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1608 AliWarning("Determinant fCovariance=0:" );
1611 (*fCovariance)(0,0) += dl3*(dYdT*dYdT+dYdB*dYdB); // <yy>
1612 (*fCovariance)(1,1) += dl3*(dXdT*dXdT+dXdB*dXdB); // <xx>
1613 (*fCovariance)(2,2) += theta02*step*(dAdT*dAdT+dAdB*dAdB); // <aa>
1614 (*fCovariance)(3,3) += theta02*step; // <bb>
1616 (*fCovariance)(0,1) += dl3*(dYdT*dXdT+dYdB*dXdB); // <yx>
1617 (*fCovariance)(1,0) = (*fCovariance)(0,1);
1619 (*fCovariance)(0,2) += dl2*(dYdT*dAdT+dYdB*dAdB); // <ya>
1620 (*fCovariance)(2,0) = (*fCovariance)(0,2);
1622 (*fCovariance)(0,3) += dl2*dYdB; // <yb>
1623 (*fCovariance)(3,0) = (*fCovariance)(0,3);
1625 (*fCovariance)(1,2) += dl2*(dXdT*dAdT+dXdB*dAdB); // <xa>
1626 (*fCovariance)(2,1) = (*fCovariance)(1,2);
1628 (*fCovariance)(1,3) += dl2*dXdB; // <xb>
1629 (*fCovariance)(3,1) = (*fCovariance)(1,3);
1631 (*fCovariance)(2,3) += theta02*step*dAdB; // <ab>
1632 (*fCovariance)(3,2) = (*fCovariance)(2,3);
1634 // Get weight matrix
1635 *fWeight = *fCovariance;
1636 if (fWeight->Determinant() != 0) {
1637 // fWeight->Invert();
1639 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
1641 AliWarning("Determinant fWeight=0:");
1645 //__________________________________________________________________________
1646 Bool_t AliMUONTrackK::Recover(void)
1648 // Adds new failed track(s) which can be tried to be recovered
1650 TClonesArray *trackPtr;
1651 AliMUONTrackK *trackK;
1653 if (fgDebug > 0) cout << " ******** Enter Recover " << endl;
1654 trackPtr = fgEventReconstructor->GetRecTracksPtr();
1656 // Remove hit with the highest chi2
1659 for (Int_t i=0; i<fNTrackHits; i++) {
1660 chi2 = fChi2Smooth ? (*fChi2Smooth)[i] : (*fChi2Array)[i];
1661 printf("%10.4f", chi2);
1664 for (Int_t i=0; i<fNTrackHits; i++) {
1665 printf("%10d", ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(i))->GetChamberNumber());
1669 Double_t chi2_max = 0;
1671 for (Int_t i=0; i<fNTrackHits; i++) {
1672 chi2 = fChi2Smooth ? (*fChi2Smooth)[i] : (*fChi2Array)[i];
1673 if (chi2 < chi2_max) continue;
1677 //if (chi2_max < 10) return kFALSE; // !!!
1678 //if (chi2_max < 25) imax = fNTrackHits - 1;
1679 if (chi2_max < 15) imax = fNTrackHits - 1; // discard the last point
1680 // Check if the outlier is not from the seed segment
1681 AliMUONHitForRec *skipHit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(imax);
1682 if (skipHit == fStartSegment->GetHitForRec1() || skipHit == fStartSegment->GetHitForRec2()) {
1683 //DropBranches(fStartSegment); // drop all tracks with the same seed segment
1684 return kFALSE; // to be changed probably
1687 // Make a copy of track hit collection
1688 TObjArray *hits = new TObjArray(*fTrackHitsPtr);
1692 // Hits after the found one will be removed
1693 if (GetStation0() == 3 && skipHit->GetChamberNumber() > 7) {
1694 SortHits(1, fTrackHitsPtr); // unsort hits
1695 imax = fTrackHitsPtr->IndexOf(skipHit);
1697 Int_t nTrackHits = fNTrackHits;
1698 for (Int_t i=imax+1; i<nTrackHits; i++) {
1699 AliMUONHitForRec *hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(i);
1700 fTrackHitsPtr->Remove(hit);
1701 hit->SetNTrackHits(hit->GetNTrackHits()-1); // unmark hit
1705 // Check if the track candidate doesn't exist yet
1706 if (ExistDouble()) { delete hits; return kFALSE; }
1708 //DropBranches(imax0, hits); // drop branches downstream the discarded hit
1711 nRecTracks = fgEventReconstructor->GetNRecTracks();
1712 skipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-1]);
1713 // Remove all saved steps and smoother matrices after the skipped hit
1714 RemoveMatrices(skipHit->GetZ());
1716 //AZ(z->-z) if (skipHit->GetZ() > fStartSegment->GetHitForRec2()->GetZ() || !fNSteps) {
1717 if (TMath::Abs(skipHit->GetZ()) > TMath::Abs(fStartSegment->GetHitForRec2()->GetZ()) || !fNSteps) {
1718 // Propagation toward high Z or skipped hit next to segment -
1719 // start track from segment
1720 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
1721 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
1722 trackK->fRecover = 1;
1723 trackK->fSkipHit = skipHit;
1724 trackK->fNTrackHits = fNTrackHits;
1725 delete trackK->fTrackHitsPtr; // not efficient ?
1726 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
1727 if (fgDebug > 0) cout << nRecTracks << " " << trackK->fRecover << endl;
1731 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
1733 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
1734 //AZ(z->-z) trackK->fTrackDir = -1;
1735 trackK->fTrackDir = 1;
1736 trackK->fRecover = 1;
1737 trackK->fSkipHit = skipHit;
1738 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
1740 trackK->fParFilter->Last()->SetUniqueID(iD-1);
1741 CreateMatrix(trackK->fParFilter);
1743 trackK->fParFilter->Last()->SetUniqueID(iD);
1745 *((TMatrixD*)trackK->fParFilter->Last()) = *((TMatrixD*)fParExtrap->Last());
1746 *(trackK->fTrackPar) = *((TMatrixD*)trackK->fParFilter->Last());
1747 iD = trackK->fCovFilter->Last()->GetUniqueID();
1749 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
1750 CreateMatrix(trackK->fCovFilter);
1752 trackK->fCovFilter->Last()->SetUniqueID(iD);
1754 *((TMatrixD*)trackK->fCovFilter->Last()) = *((TMatrixD*)fCovExtrap->Last());
1755 *(trackK->fWeight) = *((TMatrixD*)trackK->fCovFilter->Last());
1756 if (trackK->fWeight->Determinant() != 0) {
1758 mnvertLocalK(&((*(trackK->fWeight))(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1760 AliWarning("Determinant fWeight=0:");
1762 trackK->fPosition = trackK->fPositionNew = (*fSteps)[fNSteps-1];
1764 for (Int_t i=0; i<fNTrackHits-1; i++) trackK->fChi2 += (*fChi2Array)[i];
1765 if (fgDebug > 0) cout << nRecTracks << " " << trackK->fRecover << endl;
1769 //__________________________________________________________________________
1770 void AliMUONTrackK::AddMatrices(AliMUONTrackK *trackK, Double_t dChi2, AliMUONHitForRec *hitAdd)
1772 // Adds matrices for the smoother and keep Chi2 for the point
1774 //trackK->fParFilter->Last()->Print();
1775 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
1777 trackK->fParFilter->Last()->SetUniqueID(iD-1);
1778 CreateMatrix(trackK->fParFilter);
1781 *((TMatrixD*)(trackK->fParFilter->Last())) = *(trackK->fTrackPar);
1782 trackK->fParFilter->Last()->SetUniqueID(iD);
1784 cout << " Add matrices" << " " << fPosition << " " << dChi2 << " " << fgHitForRec->IndexOf(hitAdd) << endl;
1785 //trackK->fTrackPar->Print();
1786 //trackK->fTrackParNew->Print();
1787 trackK->fParFilter->Last()->Print();
1788 cout << " Add matrices" << endl;
1791 *(trackK->fCovariance) = *(trackK->fWeight);
1792 if (trackK->fCovariance->Determinant() != 0) {
1794 mnvertLocalK(&((*(trackK->fCovariance))(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1796 AliWarning("Determinant fCovariance=0:");
1798 iD = trackK->fCovFilter->Last()->GetUniqueID();
1800 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
1801 CreateMatrix(trackK->fCovFilter);
1804 *((TMatrixD*)(trackK->fCovFilter->Last())) = *(trackK->fCovariance);
1805 trackK->fCovFilter->Last()->SetUniqueID(iD);
1807 // Save Chi2-increment for point
1808 Int_t indx = trackK->fTrackHitsPtr->IndexOf(hitAdd);
1809 if (indx < 0) indx = fNTrackHits;
1810 if (trackK->fChi2Array->fN <= indx) trackK->fChi2Array->Set(indx+10);
1811 trackK->fChi2Array->AddAt(dChi2,indx);
1814 //__________________________________________________________________________
1815 void AliMUONTrackK::CreateMatrix(TObjArray *objArray)
1817 // Create new matrix and add it to TObjArray
1819 TMatrixD *matrix = (TMatrixD*) objArray->First();
1820 TMatrixD *tmp = new TMatrixD(*matrix);
1821 objArray->AddAt(tmp,objArray->GetLast());
1822 //cout << " !!! " << tmp << " " << tmp->GetUniqueID() << " " << tmp->GetNoElements() << endl;
1825 //__________________________________________________________________________
1826 void AliMUONTrackK::RemoveMatrices(Double_t zEnd)
1828 // Remove matrices (and saved steps) in the smoother part with abs(z) < abs(zEnd)
1830 for (Int_t i=fNSteps-1; i>=0; i--) {
1831 if (fgDebug > 1) printf("%10.4f %10.4f \n", (*fSteps)[i], zEnd);
1832 if (TMath::Abs((*fSteps)[i]) > TMath::Abs(zEnd) - 0.01) break;
1833 RemoveMatrices(this);
1834 } // for (Int_t i=fNSteps-1;
1837 //__________________________________________________________________________
1838 void AliMUONTrackK::RemoveMatrices(AliMUONTrackK* trackK)
1840 // Remove last saved matrices and steps in the smoother part
1843 Int_t i = trackK->fNSteps;
1846 // Delete only matrices not shared by several tracks
1847 id = trackK->fParExtrap->Last()->GetUniqueID();
1849 trackK->fParExtrap->Last()->SetUniqueID(id-1);
1850 trackK->fParExtrap->RemoveAt(i);
1852 else ((TMatrixD*)(trackK->fParExtrap->RemoveAt(i)))->Delete();
1853 id = fParFilter->Last()->GetUniqueID();
1855 trackK->fParFilter->Last()->SetUniqueID(id-1);
1856 trackK->fParFilter->RemoveAt(i);
1858 else ((TMatrixD*)(trackK->fParFilter->RemoveAt(i)))->Delete();
1859 id = trackK->fCovExtrap->Last()->GetUniqueID();
1861 trackK->fCovExtrap->Last()->SetUniqueID(id-1);
1862 trackK->fCovExtrap->RemoveAt(i);
1864 else ((TMatrixD*)(trackK->fCovExtrap->RemoveAt(i)))->Delete();
1865 id = trackK->fCovFilter->Last()->GetUniqueID();
1867 trackK->fCovFilter->Last()->SetUniqueID(id-1);
1868 trackK->fCovFilter->RemoveAt(i);
1870 else ((TMatrixD*)(trackK->fCovFilter->RemoveAt(i)))->Delete();
1871 id = trackK->fJacob->Last()->GetUniqueID();
1873 trackK->fJacob->Last()->SetUniqueID(id-1);
1874 trackK->fJacob->RemoveAt(i);
1876 else ((TMatrixD*)(trackK->fJacob->RemoveAt(i)))->Delete();
1879 //__________________________________________________________________________
1880 void mnvertLocalK(Double_t *a, Int_t l, Int_t, Int_t n, Int_t &ifail)
1882 //*-*-*-*-*-*-*-*-*-*-*-*Inverts a symmetric matrix*-*-*-*-*-*-*-*-*-*-*-*-*
1883 //*-* ==========================
1884 //*-* inverts a symmetric matrix. matrix is first scaled to
1885 //*-* have all ones on the diagonal (equivalent to change of units)
1886 //*-* but no pivoting is done since matrix is positive-definite.
1887 //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
1889 // taken from TMinuit package of Root (l>=n)
1890 // fVERTs, fVERTq and fVERTpp changed to localVERTs, localVERTq and localVERTpp
1891 // Double_t localVERTs[n], localVERTq[n], localVERTpp[n];
1892 Double_t * localVERTs = new Double_t[n];
1893 Double_t * localVERTq = new Double_t[n];
1894 Double_t * localVERTpp = new Double_t[n];
1895 // fMaxint changed to localMaxint
1896 Int_t localMaxint = n;
1898 /* System generated locals */
1901 /* Local variables */
1903 Int_t i, j, k, kp1, km1;
1905 /* Parameter adjustments */
1911 if (n < 1) goto L100;
1912 if (n > localMaxint) goto L100;
1913 //*-*- scale matrix by sqrt of diag elements
1914 for (i = 1; i <= n; ++i) {
1916 if (si <= 0) goto L100;
1917 localVERTs[i-1] = 1 / TMath::Sqrt(si);
1919 for (i = 1; i <= n; ++i) {
1920 for (j = 1; j <= n; ++j) {
1921 a[i + j*l] = a[i + j*l]*localVERTs[i-1]*localVERTs[j-1];
1924 //*-*- . . . start main loop . . . .
1925 for (i = 1; i <= n; ++i) {
1927 //*-*- preparation for elimination step1
1928 if (a[k + k*l] != 0) localVERTq[k-1] = 1 / a[k + k*l];
1930 localVERTpp[k-1] = 1;
1934 if (km1 < 0) goto L100;
1935 else if (km1 == 0) goto L50;
1938 for (j = 1; j <= km1; ++j) {
1939 localVERTpp[j-1] = a[j + k*l];
1940 localVERTq[j-1] = a[j + k*l]*localVERTq[k-1];
1944 if (k - n < 0) goto L51;
1945 else if (k - n == 0) goto L60;
1948 for (j = kp1; j <= n; ++j) {
1949 localVERTpp[j-1] = a[k + j*l];
1950 localVERTq[j-1] = -a[k + j*l]*localVERTq[k-1];
1953 //*-*- elimination proper
1955 for (j = 1; j <= n; ++j) {
1956 for (k = j; k <= n; ++k) { a[j + k*l] += localVERTpp[j-1]*localVERTq[k-1]; }
1959 //*-*- elements of left diagonal and unscaling
1960 for (j = 1; j <= n; ++j) {
1961 for (k = 1; k <= j; ++k) {
1962 a[k + j*l] = a[k + j*l]*localVERTs[k-1]*localVERTs[j-1];
1963 a[j + k*l] = a[k + j*l];
1966 delete [] localVERTs;
1967 delete [] localVERTq;
1968 delete [] localVERTpp;
1970 //*-*- failure return
1972 delete [] localVERTs;
1973 delete [] localVERTq;
1974 delete [] localVERTpp;
1978 //__________________________________________________________________________
1979 Bool_t AliMUONTrackK::Smooth(void)
1982 Int_t ihit = fNTrackHits - 1;
1983 AliMUONHitForRec *hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[ihit];
1984 fChi2Smooth = new TArrayD(fNTrackHits);
1985 fChi2Smooth->Reset(-1);
1987 fParSmooth = new TObjArray(15);
1988 fParSmooth->Clear();
1991 cout << " ******** Enter Smooth " << endl;
1992 cout << (*fSteps)[fNSteps-1] << " " << fPosition << " " << fPositionNew << endl;
1994 for (Int_t i=fNSteps-1; i>=0; i--) cout << (*fSteps)[i] << " ";
1996 for (Int_t i=fNSteps-1; i>=0; i--) {cout << i; ((TMatrixD*)fParFilter->UncheckedAt(i))->Print(); }
1998 for (Int_t i=ihit; i>=0; i--) cout << ((AliMUONHitForRec*)(*fTrackHitsPtr)[i])->GetZ() << " ";
2002 // Find last point corresponding to the last hit
2003 Int_t iLast = fNSteps - 1;
2004 for ( ; iLast>=0; iLast--) {
2005 //AZ(z->-z) if ((*fSteps)[iLast] + 0.01 > ((AliMUONHitForRec*)(*fTrackHitsPtr)[fNTrackHits-1])->GetZ()) break;
2006 if (TMath::Abs((*fSteps)[iLast]) + 0.01 > TMath::Abs(((AliMUONHitForRec*)(*fTrackHitsPtr)[fNTrackHits-1])->GetZ())) break;
2009 TMatrixD parSmooth = *((TMatrixD*)(fParFilter->UncheckedAt(iLast))); // last filtered = first smoothed
2011 TMatrixD covSmooth = *((TMatrixD*)(fCovFilter->UncheckedAt(iLast))); // last filtered = first smoothed
2012 TMatrixD tmp=covSmooth, weight=covSmooth, gain = covSmooth;
2013 TMatrixD tmpPar = *fTrackPar;
2014 //parSmooth.Print(); ((TMatrixD*)(fParExtrap->Last()))->Print();
2017 Double_t chi2_max = 0;
2018 for (Int_t i=iLast+1; i>0; i--) {
2019 if (i == iLast + 1) goto L33; // temporary fix
2021 // Smoother gain matrix
2022 weight = *((TMatrixD*)(fCovExtrap->UncheckedAt(i)));
2023 if (weight.Determinant() != 0) {
2025 mnvertLocalK(&(weight(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
2027 AliWarning("Determinant weight=0:");
2030 tmp = TMatrixD(*((TMatrixD*)(fJacob->UncheckedAt(i))),TMatrixD::kTransposeMult,weight);
2031 gain = TMatrixD(*((TMatrixD*)(fCovFilter->UncheckedAt(i-1))),TMatrixD::kMult,tmp);
2032 //cout << (*fSteps)[i-1] << " " << (*fSteps)[i] << endl; gain.Print();
2034 // Smoothed parameter vector
2035 //((TMatrixD*)(fParExtrap->UncheckedAt(i)))->Dump();
2036 parSmooth -= *((TMatrixD*)(fParExtrap->UncheckedAt(i)));
2037 tmpPar = *((TMatrixD*)(fParFilter->UncheckedAt(i-1)));
2038 tmpPar += TMatrixD(gain,TMatrixD::kMult,parSmooth);
2041 // Smoothed covariance
2042 covSmooth -= *((TMatrixD*)(fCovExtrap->UncheckedAt(i)));
2043 weight = TMatrixD(TMatrixD::kTransposed,gain);
2044 tmp = TMatrixD(covSmooth,TMatrixD::kMult,weight);
2045 covSmooth = *((TMatrixD*)(fCovFilter->UncheckedAt(i-1)));
2046 covSmooth += TMatrixD(gain,TMatrixD::kMult,tmp);
2048 // Check if there was a measurement at given z
2050 for ( ; ihit>=0; ihit--) {
2051 hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[ihit];
2052 if (TMath::Abs(hit->GetZ()-(*fSteps)[i-1]) < 0.1) { found = kTRUE; break; }
2053 //AZ(z->-z) else if (ihit < fNTrackHits-1 && hit->GetZ() > (*fSteps)[i-1]) { ihit++; break; }
2054 else if (ihit < fNTrackHits-1 && TMath::Abs(hit->GetZ()) > TMath::Abs((*fSteps)[i-1])) { ihit++; break; }
2056 if (!found) continue; // no measurement - skip the rest
2057 else if (fgDebug > 1) cout << i << " " << ihit << " " << hit->GetZ() << endl;
2058 if (ihit == 0) continue; // the first hit - skip the rest
2061 // Smoothed residuals
2063 tmpPar(0,0) = hit->GetBendingCoor() - parSmooth(0,0); // bending coordinate
2064 tmpPar(1,0) = hit->GetNonBendingCoor() - parSmooth(1,0); // non-bending coordinate
2066 cout << hit->GetBendingCoor() << " " << parSmooth(0,0) << " " << tmpPar(0,0) << endl;
2067 cout << hit->GetNonBendingCoor() << " " << parSmooth(1,0) << " " << tmpPar(1,0) << endl;
2069 // Cov. matrix of smoothed residuals
2071 tmp(0,0) = hit->GetBendingReso2() - covSmooth(0,0);
2072 tmp(1,1) = hit->GetNonBendingReso2() - covSmooth(1,1);
2073 tmp(0,1) = tmp(1,0) = -covSmooth(0,1);
2074 tmp(2,2) = tmp(3,3) = tmp(4,4) = 1;
2076 // Calculate Chi2 of smoothed residuals
2077 if (tmp.Determinant() != 0) {
2079 mnvertLocalK(&(tmp(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
2081 AliWarning("Determinant tmp=0:");
2083 TMatrixD vector(tmp,TMatrixD::kMult,tmpPar);
2084 TMatrixD chi2(tmpPar,TMatrixD::kTransposeMult,vector);
2085 if (fgDebug > 1) chi2.Print();
2086 (*fChi2Smooth)[ihit] = chi2(0,0);
2087 if (chi2(0,0) > chi2_max) chi2_max = chi2(0,0);
2089 if (chi2(0,0) < 0) {
2090 chi2.Print(); cout << i << " " << iLast << endl;
2091 AliFatal("chi2 < 0.");
2093 // Save smoothed parameters
2094 TMatrixD *par = new TMatrixD(parSmooth);
2095 fParSmooth->AddAt(par, ihit);
2097 } // for (Int_t i=iLast+1;
2099 //if (chi2_max > 16) {
2100 //if (chi2_max > 25) {
2101 //if (chi2_max > 50) {
2102 //if (chi2_max > 100) {
2103 if (chi2_max > fgkChi2max) {
2104 //if (Recover()) DropBranches();
2112 //__________________________________________________________________________
2113 void AliMUONTrackK::Outlier()
2115 // Adds new track with removed hit having the highest chi2
2118 cout << " ******** Enter Outlier " << endl;
2119 for (Int_t i=0; i<fNTrackHits; i++) printf("%10.4f", (*fChi2Smooth)[i]);
2121 for (Int_t i=0; i<fNTrackHits; i++) {
2122 printf("%10d", ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(i))->GetChamberNumber());
2127 Double_t chi2_max = 0;
2129 for (Int_t i=0; i<fNTrackHits; i++) {
2130 if ((*fChi2Smooth)[i] < chi2_max) continue;
2131 chi2_max = (*fChi2Smooth)[i];
2134 // Check if the outlier is not from the seed segment
2135 AliMUONHitForRec *hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(imax);
2136 if (hit == fStartSegment->GetHitForRec1() || hit == fStartSegment->GetHitForRec2()) return; // to be changed probably
2138 // Check for missing station
2141 if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(1))->GetChamberNumber() < 8) ok--;
2142 } else if (imax == fNTrackHits-1) {
2143 if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(fNTrackHits-2))->GetChamberNumber() > 1) ok--;
2145 else if (((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(imax-1))->GetChamberNumber()/2 - ((AliMUONHitForRec*)fTrackHitsPtr->UncheckedAt(imax+1))->GetChamberNumber()/2 > 1) ok--;
2146 if (!ok) { Recover(); return; } // try to recover track
2147 //AZ if (!ok) { if (fgDebug >= 0) cout << imax << endl; DropBranches(imax, 0); return; }
2149 // Remove saved steps and smoother matrices after the outlier
2150 RemoveMatrices(hit->GetZ());
2152 // Check for possible double track candidates
2153 //if (ExistDouble(hit)) return;
2155 TClonesArray *trackPtr = fgEventReconstructor->GetRecTracksPtr();
2156 Int_t nRecTracks = fgEventReconstructor->GetNRecTracks();
2158 AliMUONTrackK *trackK = 0;
2159 if (!fNSteps || GetStation0() == 3 && hit->GetChamberNumber() > 7) {
2160 // start track from segment
2161 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
2162 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
2163 trackK->fRecover = 2;
2164 trackK->fSkipHit = hit;
2165 trackK->fNTrackHits = fNTrackHits;
2166 delete trackK->fTrackHitsPtr; // not efficient ?
2167 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
2168 if (GetStation0() == 3) trackK->SortHits(1, trackK->fTrackHitsPtr);
2169 if (fgDebug > 0) cout << nRecTracks << " Outlier" << endl;
2172 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(NULL, NULL);
2174 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
2175 //AZ(z->-z) trackK->fTrackDir = -1;
2176 trackK->fTrackDir = 1;
2177 trackK->fRecover = 2;
2178 trackK->fSkipHit = hit;
2179 Int_t iD = trackK->fParFilter->Last()->GetUniqueID();
2181 trackK->fParFilter->Last()->SetUniqueID(iD-1);
2182 CreateMatrix(trackK->fParFilter);
2184 trackK->fParFilter->Last()->SetUniqueID(iD);
2186 *((TMatrixD*)trackK->fParFilter->Last()) = *((TMatrixD*)fParExtrap->Last());
2187 *(trackK->fTrackPar) = *((TMatrixD*)trackK->fParFilter->Last());
2188 iD = trackK->fCovFilter->Last()->GetUniqueID();
2190 trackK->fCovFilter->Last()->SetUniqueID(iD-1);
2191 CreateMatrix(trackK->fCovFilter);
2193 trackK->fCovFilter->Last()->SetUniqueID(iD);
2195 *((TMatrixD*)trackK->fCovFilter->Last()) = *((TMatrixD*)fCovExtrap->Last());
2196 *(trackK->fWeight) = *((TMatrixD*)trackK->fCovFilter->Last());
2197 if (trackK->fWeight->Determinant() != 0) {
2199 mnvertLocalK(&((*(trackK->fWeight))(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
2201 AliWarning("Determinant fWeight=0:");
2203 trackK->fPosition = trackK->fPositionNew = (*fSteps)[fNSteps-1];
2205 for (Int_t i=0; i<fNTrackHits-1; i++) trackK->fChi2 += (*fChi2Array)[i];
2206 if (fgDebug > 0) cout << nRecTracks << " Outlier " << trackK->fChi2 << endl;
2209 //__________________________________________________________________________
2210 Double_t AliMUONTrackK::GetChi2PerPoint(Int_t iPoint) const
2212 // Return Chi2 at point
2213 return fChi2Smooth ? (*fChi2Smooth)[iPoint] : (*fChi2Array)[iPoint];
2217 //__________________________________________________________________________
2218 void AliMUONTrackK::Print(FILE *lun) const
2220 // Print out track information
2223 AliMUONHitForRec *hit = 0;
2224 if (fgEventReconstructor->GetRecTrackRefHits()) {
2225 // from track ref. hits
2226 for (Int_t j=0; j<fNTrackHits; j++) {
2227 hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(j);
2228 if (hit->GetTTRTrack() > 1) { flag = 0; break; }
2230 for (Int_t j=0; j<fNTrackHits; j++) {
2231 printf("%10.4f", GetChi2PerPoint(j));
2232 if (GetChi2PerPoint(j) > -0.1) {
2233 hit = (AliMUONHitForRec*) fTrackHitsPtr->UncheckedAt(j);
2234 fprintf(lun,"%3d %3d %10.4f", gAlice->GetEvNumber(), hit->GetChamberNumber(), GetChi2PerPoint(j));
2235 fprintf(lun, "%3d %3d %3d \n", hit->GetTrackRefSignal(), hit->GetTTRTrack(), flag);
2240 // from raw clusters
2241 AliMUONRawCluster *clus = 0;
2242 TClonesArray *rawclusters = 0;
2243 for (Int_t i1=0; i1<fNTrackHits; i1++) {
2244 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
2245 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
2246 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
2247 if (TMath::Abs(clus->GetTrack(1)-1) < 2) {
2248 if (clus->GetTrack(2)) flag = 2;
2251 if (clus->GetTrack(2) && TMath::Abs(clus->GetTrack(2)-1) < 2) {
2258 Int_t sig[2]={1,1}, tid[2]={0};
2259 for (Int_t i1=0; i1<fNTrackHits; i1++) {
2260 if (GetChi2PerPoint(i1) < -0.1) continue;
2261 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
2262 rawclusters = fgEventReconstructor->GetMUONData()->RawClusters(hit->GetChamberNumber());
2263 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
2264 for (Int_t j=0; j<2; j++) {
2265 tid[j] = clus->GetTrack(j+1) - 1;
2266 if (clus->GetTrack(j+1) < 0) { sig[j] = 0; tid[j] = 999; }
2268 fprintf(lun,"%3d %3d %10.4f", gAlice->GetEvNumber(), hit->GetChamberNumber(), GetChi2PerPoint(i1));
2269 if (!(clus->GetTrack(2))) fprintf(lun, "%3d %3d", sig[0], tid[0]); // simple cluster
2270 else { // track overlap
2271 fprintf(lun, "%3d %3d", TMath::Max(sig[0],sig[1]), TMath::Min(tid[0],tid[1]));
2272 //if (tid[0] < 2) flag *= 2;
2273 //else if (tid[1] < 2) flag *= 3;
2275 fprintf (lun, "%3d \n", flag);
2280 //__________________________________________________________________________
2281 void AliMUONTrackK::DropBranches(Int_t imax, TObjArray *hits)
2283 // Drop branches downstream of the skipped hit
2285 TClonesArray *trackPtr;
2286 AliMUONTrackK *trackK;
2288 trackPtr = fgEventReconstructor->GetRecTracksPtr();
2289 nRecTracks = fgEventReconstructor->GetNRecTracks();
2290 Int_t icand = trackPtr->IndexOf(this);
2291 if (!hits) hits = fTrackHitsPtr;
2293 // Check if the track candidate doesn't exist yet
2294 for (Int_t i=icand+1; i<nRecTracks; i++) {
2295 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2296 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2297 if (trackK->GetRecover() < 0) continue;
2299 if (trackK->fNTrackHits >= imax + 1) {
2300 for (Int_t j=0; j<=imax; j++) {
2301 //if (j != fNTrackHits-1 && (*trackK->fTrackHitsPtr)[j] != (*fTrackHitsPtr)[j]) break;
2302 if ((*trackK->fTrackHitsPtr)[j] != (*hits)[j]) break;
2304 if (hits != fTrackHitsPtr) {
2305 // Drop all branches downstream the hit (for Recover)
2306 trackK->SetRecover(-1);
2307 if (fgDebug >= 0 )cout << " Recover " << i << endl;
2310 // Check if the removal of the hit breaks the track
2313 if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(1))->GetChamberNumber() < 8) ok--; }
2314 else if (imax == trackK->fNTrackHits-1) continue;
2315 // else if (imax == trackK->fNTrackHits-1) {
2316 //if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(trackK->fNTrackHits-2))->GetChamberNumber() > 1) ok--;
2318 else if (((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(imax-1))->GetChamberNumber()/2 - ((AliMUONHitForRec*)trackK->fTrackHitsPtr->UncheckedAt(imax+1))->GetChamberNumber()/2 > 1) ok--;
2319 if (!ok) trackK->SetRecover(-1);
2321 } // for (Int_t j=0;
2323 } // for (Int_t i=0;
2326 //__________________________________________________________________________
2327 void AliMUONTrackK::DropBranches(AliMUONSegment *segment)
2329 // Drop all candidates with the same seed segment
2331 TClonesArray *trackPtr;
2332 AliMUONTrackK *trackK;
2334 trackPtr = fgEventReconstructor->GetRecTracksPtr();
2335 nRecTracks = fgEventReconstructor->GetNRecTracks();
2336 Int_t icand = trackPtr->IndexOf(this);
2338 for (Int_t i=icand+1; i<nRecTracks; i++) {
2339 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2340 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2341 if (trackK->GetRecover() < 0) continue;
2342 if (trackK->fStartSegment == segment) trackK->SetRecover(-1);
2344 if (fgDebug >= 0) cout << " Drop segment " << endl;
2347 //__________________________________________________________________________
2348 AliMUONHitForRec* AliMUONTrackK::GetHitLastOk(void)
2350 // Return the hit where track stopped
2352 if (!fNSteps) return (AliMUONHitForRec*)((*fTrackHitsPtr)[1]);
2356 //__________________________________________________________________________
2357 Int_t AliMUONTrackK::GetStation0(void)
2359 // Return seed station number
2360 return fStartSegment->GetHitForRec1()->GetChamberNumber() / 2;
2363 //__________________________________________________________________________
2364 Bool_t AliMUONTrackK::ExistDouble(AliMUONHitForRec *hit)
2366 // Check if the track will make a double after outlier removal
2368 TClonesArray *trackPtr = fgEventReconstructor->GetRecTracksPtr();
2369 Int_t nRecTracks = fgEventReconstructor->GetNRecTracks();
2370 TObjArray *hitArray = new TObjArray(*fTrackHitsPtr);
2371 TObjArray *hitArray1 = new TObjArray(*hitArray);
2372 hitArray1->Remove(hit);
2373 hitArray1->Compress();
2375 Bool_t same = kFALSE;
2376 for (Int_t i=0; i<nRecTracks; i++) {
2377 AliMUONTrackK *trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2378 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2379 if (trackK == this) continue;
2380 if (trackK->fNTrackHits == fNTrackHits || trackK->fNTrackHits == fNTrackHits-1) {
2381 TObjArray *hits = new TObjArray(*trackK->fTrackHitsPtr);
2383 if (trackK->fNTrackHits == fNTrackHits) {
2384 for (Int_t j=0; j<fNTrackHits; j++) {
2385 if (hits->UncheckedAt(j) != hitArray->UncheckedAt(j)) { same = kFALSE; break; }
2387 if (same) { delete hits; break; }
2388 if (trackK->fSkipHit) {
2389 TObjArray *hits1 = new TObjArray(*hits);
2390 if (hits1->Remove(trackK->fSkipHit) > 0) {
2393 for (Int_t j=0; j<fNTrackHits-1; j++) {
2394 if (hits1->UncheckedAt(j) != hitArray1->UncheckedAt(j)) { same = kFALSE; break; }
2396 if (same) { delete hits1; break; }
2401 // Check with removed outlier
2403 for (Int_t j=0; j<fNTrackHits-1; j++) {
2404 if (hits->UncheckedAt(j) != hitArray1->UncheckedAt(j)) { same = kFALSE; break; }
2406 if (same) { delete hits; break; }
2410 } // for (Int_t i=0; i<nRecTracks;
2411 delete hitArray; delete hitArray1;
2412 if (same && fgDebug >= 0) cout << " Same" << endl;
2416 //__________________________________________________________________________
2417 Bool_t AliMUONTrackK::ExistDouble(void)
2419 // Check if the track will make a double after recovery
2421 TClonesArray *trackPtr = fgEventReconstructor->GetRecTracksPtr();
2422 Int_t nRecTracks = fgEventReconstructor->GetNRecTracks();
2424 TObjArray *hitArray = new TObjArray(*fTrackHitsPtr);
2425 if (GetStation0() == 3) SortHits(0, hitArray); // sort
2426 //if (GetStation0() == 3) SortHits(1, hitArray); // unsort
2428 Bool_t same = kFALSE;
2429 for (Int_t i=0; i<nRecTracks; i++) {
2430 AliMUONTrackK *trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
2431 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
2432 if (trackK == this) continue;
2433 //AZ if (trackK->GetRecover() < 0) continue; //
2434 if (trackK->fNTrackHits >= fNTrackHits) {
2435 TObjArray *hits = new TObjArray(*trackK->fTrackHitsPtr);
2436 if (trackK->GetStation0() == 3) SortHits(0, hits); // sort
2437 //if (trackK->GetStation0() == 3) SortHits(1, hits); // unsort
2438 for (Int_t j=0; j<fNTrackHits; j++) {
2439 //cout << fNTrackHits << " " << i << " " << j << " " << (*hitArray)[j] << " " << (*hits)[j] << " " << trackK->fSkipHit << endl;
2440 if (j != fNTrackHits-1 && (*hitArray)[j] != (*hits)[j]) break;
2441 if (j == fNTrackHits-1) {
2442 if (trackK->fSkipHit && TMath::Abs(((AliMUONHitForRec*)((*hitArray)[j]))->GetZ()-trackK->fSkipHit->GetZ()) < 0.5) same = kTRUE;
2443 //if (trackK->fNTrackHits > fNTrackHits &&
2444 //if (trackK->fSkipHit) cout << ((AliMUONHitForRec*)((*hitArray)[j]))->GetZ() << " " << trackK->fSkipHit->GetZ() << endl;
2446 } // for (Int_t j=0;
2450 } // for (Int_t i=0;