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 **************************************************************************/
16 #include <stdlib.h> // for exit()
18 #include <Riostream.h>
19 #include <TClonesArray.h>
22 #include "AliMUONTrackK.h"
23 #include "AliCallf77.h"
25 #include "AliMUONChamber.h"
26 #include "AliMUONEventReconstructor.h"
27 #include "AliMUONSegment.h"
28 #include "AliMUONHitForRec.h"
29 #include "AliMUONRawCluster.h"
30 #include "AliMUONTrackParam.h"
33 //#include "AliMagF.h"
35 const Int_t AliMUONTrackK::fgkSize = 5;
36 const Int_t AliMUONTrackK::fgkNSigma = 4;
37 const Int_t AliMUONTrackK::fgkTriesMax = 10000;
38 const Double_t AliMUONTrackK::fgkEpsilon = 0.002;
40 void mnvertLocalK(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail);
42 ClassImp(AliMUONTrackK) // Class implementation in ROOT context
44 // A few calls in Fortran or from Fortran (extrap.F).
46 # define extrap_onestep_helix extrap_onestep_helix_
47 # define extrap_onestep_helix3 extrap_onestep_helix3_
48 # define extrap_onestep_rungekutta extrap_onestep_rungekutta_
49 # define gufld_double gufld_double_
51 # define extrap_onestep_helix EXTRAP_ONESTEP_HELIX
52 # define extrap_onestep_helix3 EXTRAP_ONESTEP_HELIX3
53 # define extrap_onestep_rungekutta EXTRAP_ONESTEP_RUNGEKUTTA
54 # define gufld_double GUFLD_DOUBLE
58 void type_of_call extrap_onestep_helix
59 (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
61 void type_of_call extrap_onestep_helix3
62 (Double_t &Field, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
64 void type_of_call extrap_onestep_rungekutta
65 (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
67 void type_of_call gufld_double(Double_t *Position, Double_t *Field);
68 /* void type_of_call gufld_double(Double_t *Position, Double_t *Field) {
69 // interface to "gAlice->Field()->Field" for arguments in double precision
71 x[0] = Position[0]; x[1] = Position[1]; x[2] = Position[2];
72 gAlice->Field()->Field(x, b);
73 Field[0] = b[0]; Field[1] = b[1]; Field[2] = b[2];
78 Int_t AliMUONTrackK::fgNOfPoints = 0;
79 AliMUON* AliMUONTrackK::fgMUON = NULL;
80 AliMUONEventReconstructor* AliMUONTrackK::fgEventReconstructor = NULL;
81 TClonesArray* AliMUONTrackK::fgHitForRec = NULL;
83 //__________________________________________________________________________
84 AliMUONTrackK::AliMUONTrackK()
87 // Default constructor
89 fgEventReconstructor = NULL; // pointer to event reconstructor
90 fgMUON = NULL; // pointer to Muon module
91 fgHitForRec = NULL; // pointer to points
92 fgNOfPoints = 0; // number of points
106 //__________________________________________________________________________
107 AliMUONTrackK::AliMUONTrackK(AliMUONEventReconstructor *EventReconstructor, TClonesArray *hitForRec)
112 fgEventReconstructor = EventReconstructor; // pointer to event reconstructor
113 fgMUON = (AliMUON*) gAlice->GetModule("MUON"); // pointer to Muon module
114 fgHitForRec = hitForRec; // pointer to points
115 fgNOfPoints = fgHitForRec->GetEntriesFast(); // number of points
117 fStartSegment = NULL;
118 fTrackHitsPtr = NULL;
130 //__________________________________________________________________________
131 AliMUONTrackK::AliMUONTrackK(AliMUONSegment *segment)
134 // Constructor from a segment
136 AliMUONHitForRec *hit1, *hit2;
137 AliMUONRawCluster *clus;
138 TClonesArray *rawclusters;
140 fStartSegment = segment;
142 // Pointers to hits from the segment
143 hit1 = segment->GetHitForRec1();
144 hit2 = segment->GetHitForRec2();
145 hit1->SetNTrackHits(hit1->GetNTrackHits()+1); // mark hit as being on track
146 hit2->SetNTrackHits(hit2->GetNTrackHits()+1); // mark hit as being on track
147 // check sorting in Z
148 if (hit1->GetZ() > hit2->GetZ()) {
150 hit2 = segment->GetHitForRec1();
152 // memory allocation for the TObjArray of pointers to reconstructed TrackHit's
153 fTrackHitsPtr = new TObjArray(10);
157 fTrackPar = new TMatrixD(fgkSize,1); // track parameters
158 fTrackParNew = new TMatrixD(fgkSize,1); // track parameters
159 fCovariance = new TMatrixD(fgkSize,fgkSize); // covariance matrix
160 fWeight = new TMatrixD(fgkSize,fgkSize); // weight matrix (inverse of covariance)
162 // Fill array of track parameters
163 if (hit1->GetChamberNumber() > 7) {
164 // last tracking station
165 (*fTrackPar)(0,0) = hit1->GetBendingCoor(); // y
166 (*fTrackPar)(1,0) = hit1->GetNonBendingCoor(); // x
167 fPosition = hit1->GetZ(); // z
168 fTrackHitsPtr->Add((TObjArray*)hit2); // add hit 2
169 fTrackHitsPtr->Add((TObjArray*)hit1); // add hit 1
172 // last but one tracking station
173 (*fTrackPar)(0,0) = hit2->GetBendingCoor(); // y
174 (*fTrackPar)(1,0) = hit2->GetNonBendingCoor(); // x
175 fPosition = hit2->GetZ(); // z
176 fTrackHitsPtr->Add((TObjArray*)hit1); // add hit 1
177 fTrackHitsPtr->Add((TObjArray*)hit2); // add hit 2
180 dZ = hit2->GetZ() - hit1->GetZ();
181 dY = hit2->GetBendingCoor() - hit1->GetBendingCoor();
182 dX = hit2->GetNonBendingCoor() - hit1->GetNonBendingCoor();
183 (*fTrackPar)(2,0) = TMath::ATan2(dY,dZ); // alpha
184 (*fTrackPar)(3,0) = TMath::ATan2(dX,dZ/TMath::Cos((*fTrackPar)(2,0))); // beta
185 (*fTrackPar)(4,0) = 1/fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()); // 1/Pt
186 (*fTrackPar)(4,0) *= TMath::Cos((*fTrackPar)(3,0)); // 1/p
187 cout << fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()) << " " << 1/(*fTrackPar)(4,0) << " ";
188 if (fgEventReconstructor->GetRecGeantHits()) {
190 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetTHTrack() << "<-->" << ((AliMUONHitForRec*)((*fTrackHitsPtr)[1]))->GetTHTrack() << endl;
193 for (Int_t i=0; i<2; i++) {
194 hit1 = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
195 rawclusters = fgMUON->GetMUONData()->RawClusters(hit1->GetChamberNumber());
196 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit1->GetHitNumber());
197 cout << clus->GetTrack(1)-1;
198 if (clus->GetTrack(2) != 0) cout << " " << clus->GetTrack(2)-1;
199 if (i == 0) cout << " <--> ";
203 // Evaluate covariance (and weight) matrix
209 //__________________________________________________________________________
210 AliMUONTrackK::~AliMUONTrackK()
215 delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's
216 fTrackHitsPtr = NULL;
218 delete fTrackPar; delete fTrackParNew; delete fCovariance;
222 //__________________________________________________________________________
223 AliMUONTrackK::AliMUONTrackK (const AliMUONTrackK& source)
226 // Protected copy constructor
228 AliFatal("Not implemented.");
231 //__________________________________________________________________________
232 AliMUONTrackK & AliMUONTrackK::operator=(const AliMUONTrackK& source)
234 // Assignment operator
236 if(&source == this) return *this;
238 // base class assignement
239 TObject::operator=(source);
241 fStartSegment = source.fStartSegment;
242 fNTrackHits = source.fNTrackHits;
243 fChi2 = source.fChi2;
244 fPosition = source.fPosition;
245 fPositionNew = source.fPositionNew;
246 fTrackDir = source.fTrackDir;
247 fBPFlag = source.fBPFlag;
248 fRecover = source.fRecover;
249 fSkipHit = source.fSkipHit;
252 fTrackHitsPtr = new TObjArray(*source.fTrackHitsPtr);
253 //source.fTrackHitsPtr->Dump();
254 //fTrackHitsPtr->Dump();
256 fTrackPar = new TMatrixD(*source.fTrackPar); // track parameters
257 fTrackParNew = new TMatrixD(*source.fTrackParNew); // track parameters
258 fCovariance = new TMatrixD(*source.fCovariance); // covariance matrix
259 fWeight = new TMatrixD(*source.fWeight); // weight matrix (inverse of covariance)
264 //__________________________________________________________________________
265 void AliMUONTrackK::EvalCovariance(Double_t dZ)
267 // Evaluate covariance (and weight) matrix for track candidate
268 Double_t sigmaB, sigmaNonB, tanA, tanB, dAdY, rad, dBdX, dBdY;
270 sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution
271 sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution
273 (*fWeight)(0,0) = sigmaB*sigmaB; // <yy>
275 (*fWeight)(1,1) = sigmaNonB*sigmaNonB; // <xx>
277 tanA = TMath::Tan((*fTrackPar)(2,0));
278 dAdY = 1/(1+tanA*tanA)/dZ;
279 (*fWeight)(2,2) = dAdY*dAdY*(*fWeight)(0,0)*2; // <aa>
280 (*fWeight)(0,2) = dAdY*(*fWeight)(0,0); // <ya>
281 (*fWeight)(2,0) = (*fWeight)(0,2);
283 rad = dZ/TMath::Cos((*fTrackPar)(2,0));
284 tanB = TMath::Tan((*fTrackPar)(3,0));
285 dBdX = 1/(1+tanB*tanB)/rad;
287 (*fWeight)(3,3) = dBdX*dBdX*(*fWeight)(1,1)*2; // <bb>
288 (*fWeight)(1,3) = dBdX*(*fWeight)(1,1); // <xb>
289 (*fWeight)(3,1) = (*fWeight)(1,3);
291 //(*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.2)*((*fTrackPar)(4,0)*0.2); // error 20%
292 (*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.5)*((*fTrackPar)(4,0)*0.5); // error 50%
294 // check whether the Invert method returns flag if matrix cannot be inverted,
295 // and do not calculate the Determinant in that case !!!!
296 if (fWeight->Determinant() != 0) {
298 // fWeight->Invert();
301 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
303 AliWarning(" Determinant fWeight=0:");
308 //__________________________________________________________________________
309 Bool_t AliMUONTrackK::KalmanFilter(Int_t ichamBeg, Int_t ichamEnd, Bool_t Back, Double_t zDipole1, Double_t zDipole2)
311 // Follows track through detector stations
312 Bool_t miss, success;
313 Int_t ichamb, iFB, iMin, iMax, dChamb, ichambOK, i;
314 Int_t ihit, firstIndx, lastIndx, currIndx, dChambMiss, iDindx=0;
315 Double_t zEnd, dChi2;
316 AliMUONHitForRec *hitAdd, *firstHit, *lastHit, *hit;
317 AliMUONRawCluster *clus;
318 TClonesArray *rawclusters;
319 hit = 0; clus = 0; rawclusters = 0;
324 iFB = TMath::Sign(1,ichamEnd-ichamBeg);
325 iMin = TMath::Min(ichamEnd,ichamBeg);
326 iMax = TMath::Max(ichamEnd,ichamBeg);
330 // Get indices of the 1'st and last hits on the track candidate
331 firstHit = (AliMUONHitForRec*) fTrackHitsPtr->First();
332 lastHit = (AliMUONHitForRec*) fTrackHitsPtr->Last();
333 firstIndx = fgHitForRec->IndexOf(firstHit);
334 lastIndx = fgHitForRec->IndexOf(lastHit);
335 currIndx = TMath::Abs (TMath::Max(firstIndx*iFB,lastIndx*iFB));
341 // find hit with the highest Z
343 for (i=0; i<fNTrackHits; i++) {
344 hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
345 zEnd = hitAdd->GetZ();
346 if (zEnd > zbeg) zbeg = zEnd;
348 currIndx = fNTrackHits - i + 2; //???
353 } else if (fRecover != 0) {
354 Back = kTRUE; // dirty trick
356 if (ichamBeg == 7 || ichamBeg == 8) currIndx = fNTrackHits - 2;
358 Double_t zbeg = ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetZ();
359 for (i=1; i<fNTrackHits; i++) {
360 hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
361 zEnd = hitAdd->GetZ();
362 if (zEnd < zbeg) break;
364 currIndx = fNTrackHits - i; //???
368 while (ichamb>=iMin && ichamb<=iMax) {
369 // Find the closest hit in Z, not belonging to the current plane
372 hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-currIndx]);
373 zEnd = hitAdd->GetZ();
376 for (ihit=currIndx+iFB; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
377 hitAdd = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
378 //if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.1) {
379 if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.5) {
380 zEnd = hitAdd->GetZ();
386 if (zEnd<-999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation
388 // Check if there is a missing chamber
389 if (zEnd<-999 || TMath::Abs(hitAdd->GetChamberNumber()-ichamb) > 1) {
390 if (!Back && zEnd>-999) currIndx -= iFB;
392 zEnd = (&(fgMUON->Chamber(ichamb)))->Z();
395 ichamb = hitAdd->GetChamberNumber();
399 if (ichamb<iMin || ichamb>iMax) break;
400 // Check for missing station
402 dChamb = TMath::Abs(ichamb-ichambOK);
404 dChambMiss = endOfProp;
405 //Check if (iFB > 0) dChambMiss++;
407 if (TMath::Odd(ichambOK)) dChambMiss++;
410 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << endl;
411 if (TMath::Odd(ichambOK) && dChamb > 3-dChambMiss) {
412 // missing station - abandon track
413 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl;
415 for (Int_t i1=0; i1<fgNOfPoints; i1++) {
416 cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " ";
417 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " ";
418 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " ";
419 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " ";
420 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTHTrack() << endl;
425 cout << fNTrackHits << endl;
426 for (Int_t i1=0; i1<fNTrackHits; i1++) {
427 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
428 printf(" * %d %10.4f %10.4f %10.4f",
429 hit->GetChamberNumber(), hit->GetBendingCoor(),
430 hit->GetNonBendingCoor(), hit->GetZ());
431 if (fgEventReconstructor->GetRecGeantHits()) {
433 printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
436 rawclusters = fgMUON->RawClustAddress(hit->GetChamberNumber());
437 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
438 printf("%3d", clus->fTracks[1]-1);
439 if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
444 if (fNTrackHits>2 && fRecover==0 && !(ichambOK==((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber())) {
445 // try to recover track later
450 //Check else if (TMath::Even(ichambOK) && dChamb > 2-endOfProp) {
451 else if (TMath::Even(ichambOK) && dChamb > 2-dChambMiss) {
452 // missing station - abandon track
453 //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl;
455 for (Int_t i1=0; i1<fgNOfPoints; i1++) {
456 cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " ";
457 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " ";
458 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " ";
459 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " ";
460 cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTHTrack() << endl;
465 cout << fNTrackHits << endl;
466 for (Int_t i1=0; i1<fNTrackHits; i1++) {
467 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
468 printf(" * %d %10.4f %10.4f %10.4f",
469 hit->GetChamberNumber(), hit->GetBendingCoor(),
470 hit->GetNonBendingCoor(), hit->GetZ());
471 if (fgEventReconstructor->GetRecGeantHits()) {
473 printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack());
476 rawclusters = fgMUON->RawClustAddress(hit->GetChamberNumber());
477 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
478 printf("%3d", clus->fTracks[1]-1);
479 if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1);
484 if (fNTrackHits>2 && fRecover==0 && !(ichambOK==((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber())) {
485 // try to recover track later
492 if (endOfProp != 0) break;
494 // propagate to the found Z
496 // Check if track steps into dipole
497 if (fPosition>zDipole2 && zEnd<zDipole2) {
498 //LinearPropagation(zDipole2-zBeg);
499 ParPropagation(zDipole2);
500 MSThin(1); // multiple scattering in the chamber
501 WeightPropagation(zDipole2); // propagate weight matrix
502 fPosition = fPositionNew;
503 *fTrackPar = *fTrackParNew;
504 //MagnetPropagation(zEnd);
505 ParPropagation(zEnd);
506 WeightPropagation(zEnd);
507 fPosition = fPositionNew;
509 // Check if track steps out of dipole
510 else if (fPosition>zDipole1 && zEnd<zDipole1) {
511 //MagnetPropagation(zDipole1-zBeg);
512 ParPropagation(zDipole1);
513 MSThin(1); // multiple scattering in the chamber
514 WeightPropagation(zDipole1);
515 fPosition = fPositionNew;
516 *fTrackPar = *fTrackParNew;
517 //LinearPropagation(zEnd-zDipole1);
518 ParPropagation(zEnd);
519 WeightPropagation(zEnd);
520 fPosition = fPositionNew;
522 ParPropagation(zEnd);
523 //MSThin(1); // multiple scattering in the chamber
524 if (TMath::Abs(zEnd-fPosition) > 5) MSThin(1); // multiple scattering in the chamber
525 WeightPropagation(zEnd);
526 fPosition = fPositionNew;
530 if (fRecover != 0 && hitAdd == fSkipHit && !miss) {
531 // recovered track - remove the hit
533 ichamb = hitAdd->GetChamberNumber();
535 // remove the last hit
536 fTrackHitsPtr->Remove((TObjArray*)hitAdd); // remove hit
538 hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()-1); // unmark hit
541 for (i=fNTrackHits-1; i>1; i--) {
542 hitAdd = (AliMUONHitForRec*)((*fTrackHitsPtr)[i]);
543 fTrackHitsPtr->Remove((TObjArray*)hitAdd); // remove hit
544 hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()-1); // unmark hit
546 if (hitAdd == fSkipHit) break;
547 } // for (i=fNTrackHits-1;
550 fRecover =0; // ????????? Dec-17-2001
551 ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber();
552 currIndx = fgHitForRec->IndexOf(fSkipHit);
556 // backward propagator
557 TMatrixD pointWeight(fgkSize,fgkSize);
558 TMatrixD point(fgkSize,1);
559 TMatrixD trackParTmp = point;
560 point(0,0) = hitAdd->GetBendingCoor();
561 point(1,0) = hitAdd->GetNonBendingCoor();
562 pointWeight(0,0) = 1/hitAdd->GetBendingReso2();
563 pointWeight(1,1) = 1/hitAdd->GetNonBendingReso2();
564 TryPoint(point,pointWeight,trackParTmp,dChi2);
565 *fTrackPar = trackParTmp;
566 *fWeight += pointWeight;
567 fChi2 += dChi2; // Chi2
568 if (ichamb==ichamEnd) break;
571 // forward propagator
572 if (miss || !FindPoint(ichamb,zEnd,currIndx,iFB,hitAdd)) {
574 *fTrackPar = *fTrackParNew;
577 fTrackHitsPtr->Add((TObjArray*)hitAdd); // add hit
579 hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()+1); // mark hit as being on track
581 currIndx = fgHitForRec->IndexOf(hitAdd); // Check
585 cout << fNTrackHits << " " << fChi2 << " " << 1/(*fTrackPar)(4,0) << " " << fPosition << endl;
589 //__________________________________________________________________________
590 void AliMUONTrackK::ParPropagation(Double_t zEnd)
592 // Propagation of track parameters to zEnd
594 Double_t dZ, step, distance, charge;
595 Double_t vGeant3[7], vGeant3New[7];
598 // First step using linear extrapolation
599 dZ = zEnd - fPosition;
600 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
601 step = dZ/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)); // linear estimate
602 charge = iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0));
603 fPositionNew = fPosition;
604 *fTrackParNew = *fTrackPar;
605 SetGeantParam(vGeant3,iFB);
609 step = TMath::Abs(step);
610 // Propagate parameters
611 extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
612 distance = zEnd - vGeant3New[2];
613 step *= dZ/(vGeant3New[2]-fPositionNew);
615 } while (distance*iFB < 0 && TMath::Abs(distance) > fgkEpsilon);
617 GetFromGeantParam(vGeant3New,iFB);
619 // Position ajustment (until within tolerance)
620 while (TMath::Abs(distance) > fgkEpsilon) {
621 dZ = zEnd - fPositionNew;
622 iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ);
623 step = dZ/TMath::Cos((*fTrackParNew)(2,0))/TMath::Cos((*fTrackParNew)(3,0));
624 step = TMath::Abs(step);
625 SetGeantParam(vGeant3,iFB);
628 // Propagate parameters
629 extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New);
630 distance = zEnd - vGeant3New[2];
633 if (nTries > fgkTriesMax) {
634 cout << " ***** ParPropagation: too many tries " << nTries << endl;
637 } while (distance*iFB < 0);
639 GetFromGeantParam(vGeant3New,iFB);
641 //cout << nTries << endl;
645 //__________________________________________________________________________
646 void AliMUONTrackK::WeightPropagation(void)
648 // Propagation of the weight matrix
649 // W = DtWD, where D is Jacobian
651 // !!! not implemented TMatrixD weight1(*fJacob,TMatrixD::kAtBA,*fWeight); // DtWD
652 TMatrixD weight1(*fWeight,TMatrixD::kMult,*fJacob); // WD
653 *fWeight = TMatrixD(*fJacob,TMatrixD::kTransposeMult,weight1); // DtWD
657 //__________________________________________________________________________
658 void AliMUONTrackK::WeightPropagation(Double_t zEnd)
660 // Propagation of the weight matrix
661 // W = DtWD, where D is Jacobian
665 TMatrixD jacob(fgkSize,fgkSize);
668 // Save initial and propagated parameters
669 TMatrixD trackPar0 = *fTrackPar;
670 TMatrixD trackParNew0 = *fTrackParNew;
671 Double_t savePosition = fPositionNew;
673 // Get covariance matrix
674 *fCovariance = *fWeight;
675 // check whether the Invert method returns flag if matrix cannot be inverted,
676 // and do not calculate the Determinant in that case !!!!
677 if (fCovariance->Determinant() != 0) {
678 // fCovariance->Invert();
680 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
682 AliWarning(" Determinant fCovariance=0:");
685 // Loop over parameters to find change of the initial vs propagated ones
687 fPosition = fPositionNew;
688 for (i=0; i<fgkSize; i++) {
689 dPar = TMath::Sqrt((*fCovariance)(i,i));
690 *fTrackPar = trackParNew0;
691 (*fTrackPar)(i,0) += dPar;
692 ParPropagation(zEnd);
693 for (j=0; j<fgkSize; j++) {
694 jacob(j,i) = ((*fTrackParNew)(j,0)-trackPar0(j,0))/dPar;
699 //trackParNew0.Print();
700 //TMatrixD par1(jacob,TMatrixD::kMult,trackPar0); //
703 if (jacob.Determinant() != 0) {
706 cout << " ***** Warning in WeightPropagation: Determinant jacob=0:" << endl;
709 TMatrixD weight1(*fWeight,TMatrixD::kMult,jacob); // WD
710 *fWeight = TMatrixD(jacob,TMatrixD::kTransposeMult,weight1); // DtWD
713 // Restore initial and propagated parameters
714 *fTrackPar = trackPar0;
715 *fTrackParNew = trackParNew0;
717 fPositionNew = savePosition;
721 //__________________________________________________________________________
722 Bool_t AliMUONTrackK::FindPoint(Int_t ichamb, Double_t zEnd, Int_t currIndx, Int_t iFB, AliMUONHitForRec *&hitAdd)
724 // Picks up point within a window for the chamber No ichamb
725 // Split the track if there are more than 1 hit
726 Int_t ihit, nRecTracks;
727 Double_t windowB, windowNonB, dChi2Tmp=0, dChi2, y, x, savePosition=0;
728 TClonesArray *trackPtr;
729 AliMUONHitForRec *hit, *hitLoop;
730 AliMUONTrackK *trackK;
733 //sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution
734 //sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution
735 *fCovariance = *fWeight;
736 // check whether the Invert method returns flag if matrix cannot be inverted,
737 // and do not calculate the Determinant in that case !!!!
738 if (fCovariance->Determinant() != 0) {
739 // fCovariance->Invert();
742 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
744 AliWarning("Determinant fCovariance=0:");
746 //windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+sigmaB*sigmaB);
747 //windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+sigmaNonB*sigmaNonB);
748 // Loop over all hits and take hits from the chamber
749 TMatrixD pointWeight(fgkSize,fgkSize);
750 TMatrixD saveWeight = pointWeight;
751 TMatrixD pointWeightTmp = pointWeight;
752 TMatrixD point(fgkSize,1);
753 TMatrixD trackPar = point;
754 TMatrixD trackParTmp = point;
757 for (ihit=currIndx; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) {
758 hit = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]);
759 if (hit->GetChamberNumber() == ichamb) {
760 //if (TMath::Abs(hit->GetZ()-zEnd) < 0.1) {
761 if (TMath::Abs(hit->GetZ()-zEnd) < 0.5) {
762 if (TMath::Abs(hit->GetZ()-zEnd) > 0.1) {
763 // adjust position: for multiple hits in the chamber
764 // (mostly (only?) for GEANT hits)
766 *fTrackPar = *fTrackParNew;
767 ParPropagation(zEnd);
768 WeightPropagation(zEnd);
769 fPosition = fPositionNew;
770 *fTrackPar = *fTrackParNew;
772 *fCovariance = *fWeight;
773 if (fCovariance->Determinant() != 0) {
774 //fCovariance->Invert();
776 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
778 AliWarning("Determinant fCovariance=0:");
781 y = hit->GetBendingCoor();
782 x = hit->GetNonBendingCoor();
783 windowB = fgkNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2());
784 windowNonB = fgkNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2());
785 if (TMath::Abs((*fTrackParNew)(0,0)-y) <= windowB &&
786 TMath::Abs((*fTrackParNew)(1,0)-x) <= windowNonB) {
787 // Vector of measurements and covariance matrix
791 pointWeight(0,0) = 1/hit->GetBendingReso2();
792 pointWeight(1,1) = 1/hit->GetNonBendingReso2();
793 TryPoint(point,pointWeight,trackPar,dChi2);
794 if (TMath::Abs(1./(trackPar)(4,0)) < fgEventReconstructor->GetMinBendingMomentum()) continue; // p < p_min - next hit
797 //if (nHitsOK > -1) {
799 // Save current members
800 saveWeight = *fWeight;
801 savePosition = fPosition;
802 // temporary storage for the current track
804 trackParTmp = trackPar;
805 pointWeightTmp = pointWeight;
808 // branching: create a new track
809 trackPtr = fgEventReconstructor->GetRecTracksPtr();
810 nRecTracks = fgEventReconstructor->GetNRecTracks();
811 trackK = new ((*trackPtr)[nRecTracks])
812 AliMUONTrackK(*this); // dummy copy constructor
814 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
815 //cout << " ******** New track: " << ichamb << " " << hit->GetTHTrack() << " " << 1/(trackPar)(4,0) << " " << hit->GetBendingCoor() << " " << fNTrackHits << " " << nRecTracks << endl;
816 trackK->fRecover = 0;
817 *(trackK->fTrackPar) = trackPar;
818 *(trackK->fWeight) += pointWeight;
819 trackK->fChi2 += dChi2;
820 // Mark hits as being on 2 tracks
821 for (Int_t i=0; i<fNTrackHits; i++) {
822 hitLoop = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]);
823 hitLoop->SetNTrackHits(hitLoop->GetNTrackHits()+1);
826 cout << hitLoop->GetChamberNumber() << " ";
827 cout << hitLoop->GetBendingCoor() << " ";
828 cout << hitLoop->GetNonBendingCoor() << " ";
829 cout << hitLoop->GetZ() << " " << " ";
830 cout << hitLoop->GetGeantSignal() << " " << " ";
831 cout << hitLoop->GetTHTrack() << endl;
832 printf(" ** %d %10.4f %10.4f %10.4f %d %d \n",
833 hitLoop->GetChamberNumber(), hitLoop->GetBendingCoor(),
834 hitLoop->GetNonBendingCoor(), hitLoop->GetZ(),
835 hitLoop->GetGeantSignal(), hitLoop->GetTHTrack());
839 trackK->fTrackHitsPtr->Add((TObjArray*)hit); // add hit
840 trackK->fNTrackHits ++;
841 hit->SetNTrackHits(hit->GetNTrackHits()+1); // mark hit as being on track
844 trackK->fTrackDir = -1;
845 trackK->fBPFlag = kTRUE;
850 } else break; // different chamber
851 } // for (ihit=currIndx;
853 *fTrackPar = trackParTmp;
854 *fWeight = saveWeight;
855 *fWeight += pointWeightTmp;
856 fChi2 += dChi2Tmp; // Chi2
858 fPosition = savePosition;
863 //__________________________________________________________________________
864 void AliMUONTrackK::TryPoint(TMatrixD &point, const TMatrixD &pointWeight, TMatrixD &trackParTmp, Double_t &dChi2)
866 // Adds a measurement point (modifies track parameters and computes
869 // Solving linear system (W+U)p' = U(m-p) + (W+U)p
870 TMatrixD wu = *fWeight;
871 wu += pointWeight; // W+U
873 trackParTmp -= *fTrackParNew; // m-p
874 TMatrixD right(pointWeight,TMatrixD::kMult,trackParTmp); // U(m-p)
875 TMatrixD right1(wu,TMatrixD::kMult,*fTrackParNew); // (W+U)p
876 right += right1; // U(m-p) + (W+U)p
878 // check whether the Invert method returns flag if matrix cannot be inverted,
879 // and do not calculate the Determinant in that case !!!!
880 if (wu.Determinant() != 0) {
884 mnvertLocalK(&((wu)(0,0)), fgkSize,fgkSize,fgkSize,ifailWU);
886 AliWarning("Determinant wu=0:");
888 trackParTmp = TMatrixD(wu,TMatrixD::kMult,right);
890 right1 = trackParTmp;
891 right1 -= point; // p'-m
893 point -= *fTrackParNew; // p'-p
894 right = TMatrixD(*fWeight,TMatrixD::kMult,point); // W(p'-p)
895 TMatrixD value(point,TMatrixD::kTransposeMult,right); // (p'-p)'W(p'-p)
897 right = TMatrixD(pointWeight,TMatrixD::kMult,right1); // U(p'-m)
898 value = TMatrixD(right1,TMatrixD::kTransposeMult,right); // (p'-m)'U(p'-m)
903 //__________________________________________________________________________
904 void AliMUONTrackK::MSThin(Int_t sign)
906 // Adds multiple scattering in a thin layer (only angles are affected)
907 Double_t cosAlph, cosBeta, momentum, velo, path, theta0;
909 // check whether the Invert method returns flag if matrix cannot be inverted,
910 // and do not calculate the Determinant in that case !!!!
911 if (fWeight->Determinant() != 0) {
912 //fWeight->Invert(); // covariance
915 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
917 AliWarning("Determinant fWeight=0:");
920 cosAlph = TMath::Cos((*fTrackParNew)(2,0));
921 cosBeta = TMath::Cos((*fTrackParNew)(3,0));
922 momentum = 1/(*fTrackParNew)(4,0); // particle momentum
923 //velo = momentum/TMath::Sqrt(momentum*momentum+muonMass*muonMass); // velocity/c for muon hypothesis
924 velo = 1; // relativistic
925 path = fgEventReconstructor->GetChamberThicknessInX0()/cosAlph/cosBeta; // path length
926 theta0 = 0.0136/velo/momentum*TMath::Sqrt(path)*(1+0.038*TMath::Log(path)); // projected scattering angle
928 (*fWeight)(2,2) += sign*theta0/cosBeta*theta0/cosBeta; // alpha
929 (*fWeight)(3,3) += sign*theta0*theta0; // beta
930 //fWeight->Invert(); // weight
933 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
936 //__________________________________________________________________________
937 void AliMUONTrackK::StartBack(void)
939 // Starts backpropagator
943 for (Int_t i=0; i<fgkSize; i++) {
944 for (Int_t j=0; j<fgkSize; j++) {
945 if (j==i) (*fWeight)(i,i) /= 100;
946 //if (j==i) (*fWeight)(i,i) /= fNTrackHits*fNTrackHits;
947 else (*fWeight)(j,i) = 0;
952 //__________________________________________________________________________
953 void AliMUONTrackK::SetGeantParam(Double_t *VGeant3, Int_t iFB)
955 // Set vector of Geant3 parameters pointed to by "VGeant3"
956 // from track parameters
958 VGeant3[0] = (*fTrackParNew)(1,0); // X
959 VGeant3[1] = (*fTrackParNew)(0,0); // Y
960 VGeant3[2] = fPositionNew; // Z
961 VGeant3[3] = iFB*TMath::Sin((*fTrackParNew)(3,0)); // Px/Ptot
962 VGeant3[4] = iFB*TMath::Cos((*fTrackParNew)(3,0))*TMath::Sin((*fTrackParNew)(2,0)); // Py/Ptot
963 VGeant3[5] = iFB*TMath::Sqrt(1.0-VGeant3[3]*VGeant3[3]-VGeant3[4]*VGeant3[4]); // Pz/Ptot
964 VGeant3[6] = 1/TMath::Abs((*fTrackParNew)(4,0)); // Ptot
967 //__________________________________________________________________________
968 void AliMUONTrackK::GetFromGeantParam(Double_t *VGeant3, Int_t iFB)
970 // Get track parameters from vector of Geant3 parameters pointed
973 fPositionNew = VGeant3[2]; // Z
974 (*fTrackParNew)(0,0) = VGeant3[1]; // Y
975 (*fTrackParNew)(1,0) = VGeant3[0]; // X
976 (*fTrackParNew)(3,0) = TMath::ASin(iFB*VGeant3[3]); // beta
977 (*fTrackParNew)(2,0) = TMath::ASin(iFB*VGeant3[4]/TMath::Cos((*fTrackParNew)(3,0))); // alpha
978 (*fTrackParNew)(4,0) = 1/VGeant3[6]*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0)); // 1/Ptot
981 //__________________________________________________________________________
982 void AliMUONTrackK::SetTrackQuality(Int_t iChi2)
984 // Computes "track quality" from Chi2 (if iChi2==0) or vice versa
987 cout << " ***** Too high Chi2: " << fChi2 << endl;
991 if (iChi2 == 0) fChi2 = fNTrackHits + (250.-fChi2)/251;
992 else fChi2 = 250 - (fChi2-fNTrackHits)*251;
995 //__________________________________________________________________________
996 Int_t AliMUONTrackK::Compare(const TObject* trackK) const
998 // "Compare" function to sort with decreasing "track quality".
999 // Returns +1 (0, -1) if quality of current track
1000 // is smaller than (equal to, larger than) quality of trackK
1002 if (fChi2 < ((AliMUONTrackK*)trackK)->fChi2) return(+1);
1003 else if (fChi2 == ((AliMUONTrackK*)trackK)->fChi2) return(0);
1007 //__________________________________________________________________________
1008 Bool_t AliMUONTrackK::KeepTrack(AliMUONTrackK* track0) const
1010 // Check whether or not to keep current track
1011 // (keep, if it has less than half of common hits with track0)
1012 Int_t hitsInCommon, nHits0, i, j, nTrackHits2;
1013 AliMUONHitForRec *hit0, *hit1;
1016 nHits0 = track0->fNTrackHits;
1017 nTrackHits2 = fNTrackHits/2;
1019 for (i=0; i<nHits0; i++) {
1020 // Check if hit belongs to several tracks
1021 hit0 = (AliMUONHitForRec*) (*track0->fTrackHitsPtr)[i];
1022 if (hit0->GetNTrackHits() == 1) continue;
1023 for (j=0; j<fNTrackHits; j++) {
1024 hit1 = (AliMUONHitForRec*) (*fTrackHitsPtr)[j];
1025 if (hit1->GetNTrackHits() == 1) continue;
1028 if (hitsInCommon >= nTrackHits2) return kFALSE;
1036 //__________________________________________________________________________
1037 void AliMUONTrackK::Kill(void)
1039 // Kill track candidate
1041 AliMUONHitForRec *hit;
1043 if (fTrackHitsPtr) {
1044 // Remove track mark from hits
1045 for (i=0; i<fNTrackHits; i++) {
1046 hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[i];
1047 hit->SetNTrackHits(hit->GetNTrackHits()-1);
1050 fgEventReconstructor->GetRecTracksPtr()->Remove(this);
1053 //__________________________________________________________________________
1054 void AliMUONTrackK::Branson(void)
1056 // Propagates track to the vertex thru absorber using Branson correction
1057 // (makes use of the AliMUONTrackParam class)
1059 AliMUONTrackParam *trackParam = new AliMUONTrackParam();
1060 trackParam->SetBendingCoor((*fTrackPar)(0,0));
1061 trackParam->SetNonBendingCoor((*fTrackPar)(1,0));
1062 trackParam->SetBendingSlope(TMath::Tan((*fTrackPar)(2,0)));
1063 trackParam->SetNonBendingSlope(TMath::Tan((*fTrackPar)(3,0))/TMath::Cos((*fTrackPar)(2,0)));
1064 trackParam->SetInverseBendingMomentum((*fTrackPar)(4,0)/TMath::Cos((*fTrackPar)(3,0)));
1065 trackParam->SetZ(fPosition);
1067 trackParam->ExtrapToVertex();
1069 (*fTrackPar)(0,0) = trackParam->GetBendingCoor();
1070 (*fTrackPar)(1,0) = trackParam->GetNonBendingCoor();
1071 (*fTrackPar)(2,0) = TMath::ATan(trackParam->GetBendingSlope());
1072 (*fTrackPar)(3,0) = TMath::ATan(TMath::Cos((*fTrackPar)(2,0))*trackParam->GetNonBendingSlope());
1073 (*fTrackPar)(4,0) = TMath::Cos((*fTrackPar)(3,0))*trackParam->GetInverseBendingMomentum();
1074 fPosition = trackParam->GetZ();
1076 cout << 1/(*fTrackPar)(4,0) << " " << fPosition << " " << (*fTrackPar)(0,0) << endl;
1078 // Get covariance matrix
1079 *fCovariance = *fWeight;
1080 if (fCovariance->Determinant() != 0) {
1081 // fCovariance->Invert();
1084 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1086 AliWarning("Determinant fCovariance=0:");
1090 //__________________________________________________________________________
1091 void AliMUONTrackK::GoToZ(Double_t zEnd)
1093 // Propagates track to given Z
1095 ParPropagation(zEnd);
1096 MSThin(1); // multiple scattering in the chamber
1097 WeightPropagation(zEnd);
1098 fPosition = fPositionNew;
1099 *fTrackPar = *fTrackParNew;
1102 //__________________________________________________________________________
1103 void AliMUONTrackK::GoToVertex(void)
1106 // Propagates track to the vertex
1107 // All material constants are taken from AliRoot
1109 static Double_t x01[5] = { 24.282, // C
1114 // inner part theta < 3 degrees
1115 static Double_t x02[5] = { 30413, // Air
1120 // z positions of the materials inside the absober outer part theta > 3 degres
1121 static Double_t zPos[10] = {90, 105, 315, 443, 468};
1125 Double_t dZ, r0Norm, x0, deltaP, dChi2, pTotal, pOld;
1126 AliMUONHitForRec *hit;
1127 AliMUONRawCluster *clus;
1128 TClonesArray *rawclusters;
1130 // First step to the rear end of the absorber
1131 Double_t zRear = 503;
1133 Double_t tan3 = TMath::Tan(3./180*TMath::Pi());
1135 // Go through absorber
1136 pOld = 1/(*fTrackPar)(4,0);
1137 Double_t r0Rear = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1138 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1139 r0Rear = TMath::Sqrt(r0Rear)/fPosition/tan3;
1141 for (Int_t i=4; i>=0; i--) {
1142 ParPropagation(zPos[i]);
1143 WeightPropagation(zPos[i]);
1144 dZ = TMath::Abs (fPositionNew-fPosition);
1145 if (r0Norm > 1) x0 = x01[i];
1147 MSLine(dZ,x0); // multiple scattering in the medium (linear approximation)
1148 fPosition = fPositionNew;
1149 *fTrackPar = *fTrackParNew;
1150 r0Norm = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) +
1151 (*fTrackPar)(1,0)*(*fTrackPar)(1,0);
1152 r0Norm = TMath::Sqrt(r0Norm)/fPosition/tan3;
1154 // Correct momentum for energy losses
1155 pTotal = 1/TMath::Abs((*fTrackPar)(4,0));
1156 Double_t p0 = pTotal;
1157 for (Int_t j=0; j<2; j++) {
1161 deltaP = 2.164 + 0.145e-1*p0 - 0.417e-3*p0*p0;
1163 deltaP = 2.275 + 0.102e-2*p0 - 0.674e-6*p0*p0;
1167 deltaP = 2.581 + 0.188e-1*p0 - 0.398e-3*p0*p0;
1169 deltaP = 2.727 + 0.356e-2*p0 + 0.242e-5*p0*p0;
1176 deltaP = 2.737 + 0.0494*p0 - 0.001123*p0*p0;
1178 deltaP = 3.0643 + 0.01346*p0;
1183 deltaP = 2.1380 + 0.0351*p0 - 0.000853*p0*p0;
1185 deltaP = 2.407 + 0.00702*p0;
1189 p0 = pTotal + deltaP/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0));
1191 (*fTrackPar)(4,0) = 1/p0*TMath::Sign((Double_t)1.,(*fTrackPar)(4,0));
1194 ParPropagation((Double_t)0.);
1195 WeightPropagation((Double_t)0.);
1196 fPosition = fPositionNew;
1197 //*fTrackPar = *fTrackParNew;
1198 // Add vertex as a hit
1199 TMatrixD pointWeight(fgkSize,fgkSize);
1200 TMatrixD point(fgkSize,1);
1201 TMatrixD trackParTmp = point;
1202 point(0,0) = 0; // vertex coordinate - should be taken somewhere
1203 point(1,0) = 0; // vertex coordinate - should be taken somewhere
1204 pointWeight(0,0) = 1/1.e-3/1.e-3; // 10 um error
1205 pointWeight(1,1) = 1/1.e-3/1.e-3; // 10 um error
1206 TryPoint(point,pointWeight,trackParTmp,dChi2);
1207 *fTrackPar = trackParTmp;
1208 *fWeight += pointWeight;
1209 fChi2 += dChi2; // Chi2
1210 cout << pOld << " " << 1/(*fTrackPar)(4,0) << " " << dChi2 << " " << fChi2 << " " << fNTrackHits << endl;
1211 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1212 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1213 printf ("%4d", hit->GetChamberNumber());
1214 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetChamberNumber() << " ";
1217 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1218 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1219 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1220 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1221 printf ("%4d", fgHitForRec->IndexOf(hit));
1222 //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " ";
1225 if (fgEventReconstructor->GetRecGeantHits()) {
1227 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1228 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1229 cout << hit->GetTHTrack() + hit->GetGeantSignal()*10000 << " ";
1232 // from raw clusters
1233 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1234 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1235 rawclusters = fgMUON->GetMUONData()->RawClusters(hit->GetChamberNumber());
1236 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1237 printf ("%4d", clus->GetTrack(1) - 1);
1238 //cout << clus->fTracks[1] - 1 << " ";
1241 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1242 hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]);
1243 rawclusters = fgMUON->GetMUONData()->RawClusters(hit->GetChamberNumber());
1244 clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber());
1245 if (clus->GetTrack(2) != 0) printf ("%4d", clus->GetTrack(2) - 1);
1246 else printf ("%4s", " ");
1247 //if (clus->fTracks[2] != 0) cout << clus->fTracks[2] - 1 << " ";
1251 for (Int_t i1=0; i1<fNTrackHits; i1++) {
1252 //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " ";
1253 cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " ";
1254 //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " ";
1257 cout << "---------------------------------------------------" << endl;
1259 // Get covariance matrix
1260 *fCovariance = *fWeight;
1261 if (fCovariance->Determinant() != 0) {
1262 // fCovariance->Invert();
1265 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1267 AliWarning("Determinant fCovariance=0:" );
1271 //__________________________________________________________________________
1272 void AliMUONTrackK::MSLine(Double_t dZ, Double_t x0)
1274 // Adds multiple scattering in a thick layer for linear propagation
1276 Double_t cosAlph = TMath::Cos((*fTrackPar)(2,0));
1277 Double_t tanAlph = TMath::Tan((*fTrackPar)(2,0));
1278 Double_t cosBeta = TMath::Cos((*fTrackPar)(3,0));
1280 sinBeta = TMath::Sin((*fTrackPar)(3,0));
1281 Double_t tanBeta = TMath::Tan((*fTrackPar)(3,0));
1282 Double_t momentum = 1/(*fTrackPar)(4,0);
1283 Double_t velo = 1; // relativistic velocity
1284 Double_t step = TMath::Abs(dZ)/cosAlph/cosBeta; // step length
1286 // Projected scattering angle
1287 Double_t theta0 = 0.0136/velo/momentum/TMath::Sqrt(x0)*(1+0.038*TMath::Log(step/x0));
1288 Double_t theta02 = theta0*theta0;
1289 Double_t dl2 = step*step/2*theta02;
1290 Double_t dl3 = dl2*step*2/3;
1293 Double_t dYdT = 1/cosAlph;
1294 Double_t dYdB = 0; //(*fTrackPar)(2,0)*sinBeta/cosAlph;
1295 Double_t dXdT = tanAlph*tanBeta;
1296 //Double_t dXdB = (1+(*fTrackPar)(2,0)*tanAlph*sinBeta*sinBeta)/cosBeta;
1297 Double_t dXdB = 1/cosBeta;
1298 Double_t dAdT = 1/cosBeta;
1299 Double_t dAdB = 0; //(*fTrackPar)(2,0)*tanBeta;
1301 // Get covariance matrix
1302 *fCovariance = *fWeight;
1303 if (fCovariance->Determinant() != 0) {
1304 // fCovariance->Invert();
1307 mnvertLocalK(&((*fCovariance)(0,0)), fgkSize,fgkSize,fgkSize,ifailCov);
1309 AliWarning("Determinant fCovariance=0:" );
1312 (*fCovariance)(0,0) += dl3*(dYdT*dYdT+dYdB*dYdB); // <yy>
1313 (*fCovariance)(1,1) += dl3*(dXdT*dXdT+dXdB*dXdB); // <xx>
1314 (*fCovariance)(2,2) += theta02*step*(dAdT*dAdT+dAdB*dAdB); // <aa>
1315 (*fCovariance)(3,3) += theta02*step; // <bb>
1317 (*fCovariance)(0,1) += dl3*(dYdT*dXdT+dYdB*dXdB); // <yx>
1318 (*fCovariance)(1,0) = (*fCovariance)(0,1);
1320 (*fCovariance)(0,2) += dl2*(dYdT*dAdT+dYdB*dAdB); // <ya>
1321 (*fCovariance)(2,0) = (*fCovariance)(0,2);
1323 (*fCovariance)(0,3) += dl2*dYdB; // <yb>
1324 (*fCovariance)(3,0) = (*fCovariance)(0,3);
1326 (*fCovariance)(1,2) += dl2*(dXdT*dAdT+dXdB*dAdB); // <xa>
1327 (*fCovariance)(2,1) = (*fCovariance)(1,2);
1329 (*fCovariance)(1,3) += dl2*dXdB; // <xb>
1330 (*fCovariance)(3,1) = (*fCovariance)(1,3);
1332 (*fCovariance)(2,3) += theta02*step*dAdB; // <ab>
1333 (*fCovariance)(3,2) = (*fCovariance)(2,3);
1335 // Get weight matrix
1336 *fWeight = *fCovariance;
1337 if (fWeight->Determinant() != 0) {
1338 // fWeight->Invert();
1341 mnvertLocalK(&((*fWeight)(0,0)), fgkSize,fgkSize,fgkSize,ifailWeight);
1343 AliWarning("Determinant fWeight=0:");
1347 //__________________________________________________________________________
1348 void AliMUONTrackK::Recover(void)
1350 // Adds new failed track(s) which can be tried to be recovered
1351 Int_t nRecTracks, ichamb;
1352 TClonesArray *trackPtr;
1353 AliMUONTrackK *trackK;
1355 //cout << " ******** Enter Recover " << endl;
1357 trackPtr = fgEventReconstructor->GetRecTracksPtr();
1359 // The last hit will be removed
1360 nRecTracks = fgEventReconstructor->GetNRecTracks();
1362 // Check if the track candidate doesn't exist yet
1363 for (Int_t i=0; i<nRecTracks; i++) {
1364 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
1365 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
1366 if (trackK == this) continue;
1367 //if (trackK->GetRecover() != 1) continue;
1368 if (trackK->fNTrackHits >= fNTrackHits-1) {
1370 for (Int_t j=0; j<fNTrackHits-1; j++) {
1371 if ((*trackK->fTrackHitsPtr)[j] != ((*fTrackHitsPtr)[j])) break;
1373 } // for (Int_t j=0;
1375 if ((*trackK->fTrackHitsPtr)[0] == ((*fTrackHitsPtr)[0])) return;
1377 } // for (Int_t i=0;
1379 cout << " ******** Enter Recover " << endl;
1380 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
1381 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
1382 trackK->fRecover = 1;
1383 trackK->fSkipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-1]);
1384 trackK->fNTrackHits = fNTrackHits;
1385 delete trackK->fTrackHitsPtr; // not efficient ?
1386 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
1387 cout << nRecTracks << " " << trackK->fRecover << endl;
1389 // The hit before missing chamber will be removed
1390 Int_t ichamBeg = ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber();
1391 Int_t indxSkip = -1;
1392 if (ichamBeg == 9) {
1393 // segment in the last station
1394 // look for the missing chamber
1395 for (Int_t i=1; i<fNTrackHits; i++) {
1396 ichamb = ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetChamberNumber();
1397 if (TMath::Abs(ichamBeg-ichamb)>1 && i>2) {
1402 } // for (Int_t i=1;
1404 // in the last but one station
1405 for (Int_t i=1; i<fNTrackHits; i++) {
1406 ichamb = ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetChamberNumber();
1407 if (TMath::Abs(ichamBeg-ichamb)>1 && ichamb<4) {
1412 } // for (Int_t i=1;
1414 if (indxSkip < 0) return;
1416 // Check if the track candidate doesn't exist yet
1417 for (Int_t i=0; i<nRecTracks; i++) {
1418 trackK = (AliMUONTrackK*) ((*trackPtr)[i]);
1419 if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue;
1420 if (trackK == this) continue;
1421 //if (trackK->GetRecover() != 1) continue;
1422 if (trackK->fNTrackHits >= indxSkip-1) {
1424 for (Int_t j=0; j<indxSkip-1; j++) {
1425 if ((*trackK->fTrackHitsPtr)[j] != ((*fTrackHitsPtr)[j])) break;
1427 } // for (Int_t j=0;
1429 if ((*trackK->fTrackHitsPtr)[0] == ((*fTrackHitsPtr)[0])) return;
1431 } // for (Int_t i=0;
1433 nRecTracks = fgEventReconstructor->GetNRecTracks();
1434 trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment);
1435 fgEventReconstructor->SetNRecTracks(nRecTracks+1);
1436 trackK->fRecover = 2;
1437 trackK->fSkipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[indxSkip-1]);
1438 trackK->fNTrackHits = fNTrackHits;
1439 delete trackK->fTrackHitsPtr; // not efficient ?
1440 trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr);
1441 cout << nRecTracks << " " << trackK->fRecover << endl;
1444 //______________________________________________________________________________
1445 void mnvertLocalK(Double_t *a, Int_t l, Int_t, Int_t n, Int_t &ifail)
1447 //*-*-*-*-*-*-*-*-*-*-*-*Inverts a symmetric matrix*-*-*-*-*-*-*-*-*-*-*-*-*
1448 //*-* ==========================
1449 //*-* inverts a symmetric matrix. matrix is first scaled to
1450 //*-* have all ones on the diagonal (equivalent to change of units)
1451 //*-* but no pivoting is done since matrix is positive-definite.
1452 //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
1454 // taken from TMinuit package of Root (l>=n)
1455 // fVERTs, fVERTq and fVERTpp changed to localVERTs, localVERTq and localVERTpp
1456 // Double_t localVERTs[n], localVERTq[n], localVERTpp[n];
1457 Double_t * localVERTs = new Double_t[n];
1458 Double_t * localVERTq = new Double_t[n];
1459 Double_t * localVERTpp = new Double_t[n];
1460 // fMaxint changed to localMaxint
1461 Int_t localMaxint = n;
1463 /* System generated locals */
1466 /* Local variables */
1468 Int_t i, j, k, kp1, km1;
1470 /* Parameter adjustments */
1476 if (n < 1) goto L100;
1477 if (n > localMaxint) goto L100;
1478 //*-*- scale matrix by sqrt of diag elements
1479 for (i = 1; i <= n; ++i) {
1481 if (si <= 0) goto L100;
1482 localVERTs[i-1] = 1 / TMath::Sqrt(si);
1484 for (i = 1; i <= n; ++i) {
1485 for (j = 1; j <= n; ++j) {
1486 a[i + j*l] = a[i + j*l]*localVERTs[i-1]*localVERTs[j-1];
1489 //*-*- . . . start main loop . . . .
1490 for (i = 1; i <= n; ++i) {
1492 //*-*- preparation for elimination step1
1493 if (a[k + k*l] != 0) localVERTq[k-1] = 1 / a[k + k*l];
1495 localVERTpp[k-1] = 1;
1499 if (km1 < 0) goto L100;
1500 else if (km1 == 0) goto L50;
1503 for (j = 1; j <= km1; ++j) {
1504 localVERTpp[j-1] = a[j + k*l];
1505 localVERTq[j-1] = a[j + k*l]*localVERTq[k-1];
1509 if (k - n < 0) goto L51;
1510 else if (k - n == 0) goto L60;
1513 for (j = kp1; j <= n; ++j) {
1514 localVERTpp[j-1] = a[k + j*l];
1515 localVERTq[j-1] = -a[k + j*l]*localVERTq[k-1];
1518 //*-*- elimination proper
1520 for (j = 1; j <= n; ++j) {
1521 for (k = j; k <= n; ++k) { a[j + k*l] += localVERTpp[j-1]*localVERTq[k-1]; }
1524 //*-*- elements of left diagonal and unscaling
1525 for (j = 1; j <= n; ++j) {
1526 for (k = 1; k <= j; ++k) {
1527 a[k + j*l] = a[k + j*l]*localVERTs[k-1]*localVERTs[j-1];
1528 a[j + k*l] = a[k + j*l];
1535 //*-*- failure return