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1 | /************************************************************************** |
| 2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
| 3 | * * |
| 4 | * Author: The ALICE Off-line Project. * |
| 5 | * Contributors are mentioned in the code where appropriate. * |
| 6 | * * |
| 7 | * Permission to use, copy, modify and distribute this software and its * |
| 8 | * documentation strictly for non-commercial purposes is hereby granted * |
| 9 | * without fee, provided that the above copyright notice appears in all * |
| 10 | * copies and that both the copyright notice and this permission notice * |
| 11 | * appear in the supporting documentation. The authors make no claims * |
| 12 | * about the suitability of this software for any purpose. It is * |
| 13 | * provided "as is" without express or implied warranty. * |
| 14 | **************************************************************************/ |
| 15 | |
| 16 | #include "AliMUONTrackK.h" |
| 17 | |
| 18 | #include <Riostream.h> |
| 19 | #include <TClonesArray.h> |
| 20 | #include <TArrayD.h> |
| 21 | #include <TMatrixD.h> |
| 22 | #include <stdlib.h> // for exit() |
| 23 | |
| 24 | #include "AliCallf77.h" |
| 25 | #include "AliMUON.h" |
| 26 | #include "AliMUONChamber.h" |
| 27 | #include "AliMUONEventReconstructor.h" |
| 28 | #include "AliMUONSegment.h" |
| 29 | #include "AliMUONHitForRec.h" |
| 30 | #include "AliMUONRawCluster.h" |
| 31 | #include "AliMUONTrackParam.h" |
| 32 | #include "AliRun.h" |
| 33 | #include "AliMagF.h" |
| 34 | |
| 35 | void mnvertLocalK(Double_t* a, Int_t l, Int_t m, Int_t n, Int_t& ifail); |
| 36 | |
| 37 | ClassImp(AliMUONTrackK) // Class implementation in ROOT context |
| 38 | |
| 39 | // A few calls in Fortran or from Fortran (extrap.F). |
| 40 | #ifndef WIN32 |
| 41 | # define extrap_onestep_helix extrap_onestep_helix_ |
| 42 | # define extrap_onestep_helix3 extrap_onestep_helix3_ |
| 43 | # define extrap_onestep_rungekutta extrap_onestep_rungekutta_ |
| 44 | # define gufld_double gufld_double_ |
| 45 | #else |
| 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 |
| 50 | #endif |
| 51 | |
| 52 | extern "C" { |
| 53 | void type_of_call extrap_onestep_helix |
| 54 | (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New); |
| 55 | |
| 56 | void type_of_call extrap_onestep_helix3 |
| 57 | (Double_t &Field, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New); |
| 58 | |
| 59 | void type_of_call extrap_onestep_rungekutta |
| 60 | (Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New); |
| 61 | |
| 62 | void type_of_call gufld_double(Double_t *Position, Double_t *Field); |
| 63 | /* void type_of_call gufld_double(Double_t *Position, Double_t *Field) { |
| 64 | // interface to "gAlice->Field()->Field" for arguments in double precision |
| 65 | Float_t x[3], b[3]; |
| 66 | x[0] = Position[0]; x[1] = Position[1]; x[2] = Position[2]; |
| 67 | gAlice->Field()->Field(x, b); |
| 68 | Field[0] = b[0]; Field[1] = b[1]; Field[2] = b[2]; |
| 69 | } |
| 70 | */ |
| 71 | } |
| 72 | |
| 73 | Int_t AliMUONTrackK::fgNOfPoints = 0; |
| 74 | AliMUON* AliMUONTrackK::fgMUON = NULL; |
| 75 | AliMUONEventReconstructor* AliMUONTrackK::fgEventReconstructor = NULL; |
| 76 | TClonesArray* AliMUONTrackK::fgHitForRec = NULL; |
| 77 | |
| 78 | //__________________________________________________________________________ |
| 79 | AliMUONTrackK::AliMUONTrackK() |
| 80 | { |
| 81 | // Default constructor |
| 82 | |
| 83 | fgEventReconstructor = NULL; // pointer to event reconstructor |
| 84 | fgMUON = NULL; // pointer to Muon module |
| 85 | fgHitForRec = NULL; // pointer to points |
| 86 | fgNOfPoints = 0; // number of points |
| 87 | |
| 88 | fStartSegment = NULL; |
| 89 | fTrackHitsPtr = NULL; |
| 90 | fNTrackHits = 0; |
| 91 | fTrackPar = NULL; |
| 92 | fTrackParNew = NULL; |
| 93 | fCovariance = NULL; |
| 94 | fWeight = NULL; |
| 95 | fSkipHit = NULL; |
| 96 | |
| 97 | return; |
| 98 | } |
| 99 | |
| 100 | //__________________________________________________________________________ |
| 101 | AliMUONTrackK::AliMUONTrackK(AliMUONEventReconstructor *EventReconstructor, TClonesArray *hitForRec) |
| 102 | { |
| 103 | // Constructor |
| 104 | |
| 105 | fgEventReconstructor = EventReconstructor; // pointer to event reconstructor |
| 106 | fgMUON = (AliMUON*) gAlice->GetModule("MUON"); // pointer to Muon module |
| 107 | fgHitForRec = hitForRec; // pointer to points |
| 108 | fgNOfPoints = fgHitForRec->GetEntriesFast(); // number of points |
| 109 | |
| 110 | fStartSegment = NULL; |
| 111 | fTrackHitsPtr = NULL; |
| 112 | fNTrackHits = 0; |
| 113 | fChi2 = 0; |
| 114 | fTrackPar = NULL; |
| 115 | fTrackParNew = NULL; |
| 116 | fCovariance = NULL; |
| 117 | fWeight = NULL; |
| 118 | fSkipHit = NULL; |
| 119 | |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | //__________________________________________________________________________ |
| 124 | AliMUONTrackK::AliMUONTrackK(AliMUONSegment *segment) |
| 125 | { |
| 126 | // Constructor from a segment |
| 127 | Double_t dX, dY, dZ; |
| 128 | AliMUONHitForRec *hit1, *hit2; |
| 129 | AliMUONRawCluster *clus; |
| 130 | TClonesArray *rawclusters; |
| 131 | |
| 132 | fStartSegment = segment; |
| 133 | fRecover = 0; |
| 134 | // Pointers to hits from the segment |
| 135 | hit1 = segment->GetHitForRec1(); |
| 136 | hit2 = segment->GetHitForRec2(); |
| 137 | hit1->SetNTrackHits(hit1->GetNTrackHits()+1); // mark hit as being on track |
| 138 | hit2->SetNTrackHits(hit2->GetNTrackHits()+1); // mark hit as being on track |
| 139 | // check sorting in Z |
| 140 | if (hit1->GetZ() > hit2->GetZ()) { |
| 141 | hit1 = hit2; |
| 142 | hit2 = segment->GetHitForRec1(); |
| 143 | } |
| 144 | // memory allocation for the TObjArray of pointers to reconstructed TrackHit's |
| 145 | fTrackHitsPtr = new TObjArray(10); |
| 146 | fNTrackHits = 2; |
| 147 | fChi2 = 0; |
| 148 | fBPFlag = kFALSE; |
| 149 | fTrackPar = new TMatrixD(kSize,1); // track parameters |
| 150 | fTrackParNew = new TMatrixD(kSize,1); // track parameters |
| 151 | fCovariance = new TMatrixD(kSize,kSize); // covariance matrix |
| 152 | fWeight = new TMatrixD(kSize,kSize); // weight matrix (inverse of covariance) |
| 153 | |
| 154 | // Fill array of track parameters |
| 155 | if (hit1->GetChamberNumber() > 7) { |
| 156 | // last tracking station |
| 157 | (*fTrackPar)(0,0) = hit1->GetBendingCoor(); // y |
| 158 | (*fTrackPar)(1,0) = hit1->GetNonBendingCoor(); // x |
| 159 | fPosition = hit1->GetZ(); // z |
| 160 | fTrackHitsPtr->Add((TObjArray*)hit2); // add hit 2 |
| 161 | fTrackHitsPtr->Add((TObjArray*)hit1); // add hit 1 |
| 162 | fTrackDir = -1; |
| 163 | } else { |
| 164 | // last but one tracking station |
| 165 | (*fTrackPar)(0,0) = hit2->GetBendingCoor(); // y |
| 166 | (*fTrackPar)(1,0) = hit2->GetNonBendingCoor(); // x |
| 167 | fPosition = hit2->GetZ(); // z |
| 168 | fTrackHitsPtr->Add((TObjArray*)hit1); // add hit 1 |
| 169 | fTrackHitsPtr->Add((TObjArray*)hit2); // add hit 2 |
| 170 | fTrackDir = 1; |
| 171 | } |
| 172 | dZ = hit2->GetZ() - hit1->GetZ(); |
| 173 | dY = hit2->GetBendingCoor() - hit1->GetBendingCoor(); |
| 174 | dX = hit2->GetNonBendingCoor() - hit1->GetNonBendingCoor(); |
| 175 | (*fTrackPar)(2,0) = TMath::ATan2(dY,dZ); // alpha |
| 176 | (*fTrackPar)(3,0) = TMath::ATan2(dX,dZ/TMath::Cos((*fTrackPar)(2,0))); // beta |
| 177 | (*fTrackPar)(4,0) = 1/fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()); // 1/Pt |
| 178 | (*fTrackPar)(4,0) *= TMath::Cos((*fTrackPar)(3,0)); // 1/p |
| 179 | cout << fgEventReconstructor->GetBendingMomentumFromImpactParam(segment->GetBendingImpact()) << " " << 1/(*fTrackPar)(4,0) << " "; |
| 180 | if (fgEventReconstructor->GetRecGeantHits()) { |
| 181 | // from GEANT hits |
| 182 | cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetTHTrack() << "<-->" << ((AliMUONHitForRec*)((*fTrackHitsPtr)[1]))->GetTHTrack() << endl; |
| 183 | } else { |
| 184 | // from raw clusters |
| 185 | for (Int_t i=0; i<2; i++) { |
| 186 | hit1 = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]); |
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187 | rawclusters = fgMUON->GetMUONData()->RawClusters(hit1->GetChamberNumber()); |
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188 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit1->GetHitNumber()); |
| 189 | cout << clus->fTracks[1]-1; |
| 190 | if (clus->fTracks[2] != 0) cout << " " << clus->fTracks[2]-1; |
| 191 | if (i == 0) cout << " <--> "; |
| 192 | } |
| 193 | cout << endl; |
| 194 | } |
| 195 | // Evaluate covariance (and weight) matrix |
| 196 | EvalCovariance(dZ); |
| 197 | |
| 198 | return; |
| 199 | } |
| 200 | |
| 201 | //__________________________________________________________________________ |
| 202 | AliMUONTrackK::~AliMUONTrackK() |
| 203 | { |
| 204 | // Destructor |
| 205 | |
| 206 | if (fTrackHitsPtr) { |
| 207 | delete fTrackHitsPtr; // delete the TObjArray of pointers to TrackHit's |
| 208 | fTrackHitsPtr = NULL; |
| 209 | } |
| 210 | delete fTrackPar; delete fTrackParNew; delete fCovariance; |
| 211 | delete fWeight; |
| 212 | } |
| 213 | |
| 214 | //__________________________________________________________________________ |
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215 | AliMUONTrackK::AliMUONTrackK (const AliMUONTrackK& source):TObject(source) |
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216 | { |
| 217 | // Dummy copy constructor |
| 218 | } |
| 219 | |
| 220 | //__________________________________________________________________________ |
| 221 | AliMUONTrackK & AliMUONTrackK::operator=(const AliMUONTrackK& source) |
| 222 | { |
| 223 | // Assignment operator |
| 224 | // Members |
| 225 | if(&source == this) return *this; |
| 226 | fStartSegment = source.fStartSegment; |
| 227 | fNTrackHits = source.fNTrackHits; |
| 228 | fChi2 = source.fChi2; |
| 229 | fPosition = source.fPosition; |
| 230 | fPositionNew = source.fPositionNew; |
| 231 | fTrackDir = source.fTrackDir; |
| 232 | fBPFlag = source.fBPFlag; |
| 233 | fRecover = source.fRecover; |
| 234 | fSkipHit = source.fSkipHit; |
| 235 | |
| 236 | // Pointers |
| 237 | fTrackHitsPtr = new TObjArray(*source.fTrackHitsPtr); |
| 238 | //source.fTrackHitsPtr->Dump(); |
| 239 | //fTrackHitsPtr->Dump(); |
| 240 | |
| 241 | fTrackPar = new TMatrixD(*source.fTrackPar); // track parameters |
| 242 | fTrackParNew = new TMatrixD(*source.fTrackParNew); // track parameters |
| 243 | fCovariance = new TMatrixD(*source.fCovariance); // covariance matrix |
| 244 | fWeight = new TMatrixD(*source.fWeight); // weight matrix (inverse of covariance) |
| 245 | |
| 246 | return *this; |
| 247 | } |
| 248 | |
| 249 | //__________________________________________________________________________ |
| 250 | void AliMUONTrackK::EvalCovariance(Double_t dZ) |
| 251 | { |
| 252 | // Evaluate covariance (and weight) matrix for track candidate |
| 253 | Double_t sigmaB, sigmaNonB, tanA, tanB, dAdY, rad, dBdX, dBdY; |
| 254 | |
| 255 | sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution |
| 256 | sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution |
| 257 | |
| 258 | (*fWeight)(0,0) = sigmaB*sigmaB; // <yy> |
| 259 | |
| 260 | (*fWeight)(1,1) = sigmaNonB*sigmaNonB; // <xx> |
| 261 | |
| 262 | tanA = TMath::Tan((*fTrackPar)(2,0)); |
| 263 | dAdY = 1/(1+tanA*tanA)/dZ; |
| 264 | (*fWeight)(2,2) = dAdY*dAdY*(*fWeight)(0,0)*2; // <aa> |
| 265 | (*fWeight)(0,2) = dAdY*(*fWeight)(0,0); // <ya> |
| 266 | (*fWeight)(2,0) = (*fWeight)(0,2); |
| 267 | |
| 268 | rad = dZ/TMath::Cos((*fTrackPar)(2,0)); |
| 269 | tanB = TMath::Tan((*fTrackPar)(3,0)); |
| 270 | dBdX = 1/(1+tanB*tanB)/rad; |
| 271 | dBdY = 0; // neglect |
| 272 | (*fWeight)(3,3) = dBdX*dBdX*(*fWeight)(1,1)*2; // <bb> |
| 273 | (*fWeight)(1,3) = dBdX*(*fWeight)(1,1); // <xb> |
| 274 | (*fWeight)(3,1) = (*fWeight)(1,3); |
| 275 | |
| 276 | //(*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.2)*((*fTrackPar)(4,0)*0.2); // error 20% |
| 277 | (*fWeight)(4,4) = ((*fTrackPar)(4,0)*0.5)*((*fTrackPar)(4,0)*0.5); // error 50% |
| 278 | |
| 279 | // check whether the Invert method returns flag if matrix cannot be inverted, |
| 280 | // and do not calculate the Determinant in that case !!!! |
| 281 | if (fWeight->Determinant() != 0) { |
| 282 | |
| 283 | // fWeight->Invert(); |
| 284 | |
| 285 | Int_t ifailWeight; |
| 286 | mnvertLocalK(&((*fWeight)(0,0)), kSize,kSize,kSize,ifailWeight); |
| 287 | } else { |
| 288 | cout << " ***** Warning in EvalCovariance: Determinant fWeight=0:" << endl; |
| 289 | } |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | //__________________________________________________________________________ |
| 294 | Bool_t AliMUONTrackK::KalmanFilter(Int_t ichamBeg, Int_t ichamEnd, Bool_t Back, Double_t zDipole1, Double_t zDipole2) |
| 295 | { |
| 296 | // Follows track through detector stations |
| 297 | Bool_t miss, success; |
| 298 | Int_t ichamb, iFB, iMin, iMax, dChamb, ichambOK, i; |
| 299 | Int_t ihit, firstIndx, lastIndx, currIndx, dChambMiss, iDindx=0; |
| 300 | Double_t zEnd, dChi2; |
| 301 | AliMUONHitForRec *hitAdd, *firstHit, *lastHit, *hit; |
| 302 | AliMUONRawCluster *clus; |
| 303 | TClonesArray *rawclusters; |
| 304 | hit = 0; clus = 0; rawclusters = 0; |
| 305 | |
| 306 | miss = kTRUE; |
| 307 | success = kTRUE; |
| 308 | Int_t endOfProp = 0; |
| 309 | iFB = TMath::Sign(1,ichamEnd-ichamBeg); |
| 310 | iMin = TMath::Min(ichamEnd,ichamBeg); |
| 311 | iMax = TMath::Max(ichamEnd,ichamBeg); |
| 312 | ichamb = ichamBeg; |
| 313 | ichambOK = ichamb; |
| 314 | |
| 315 | // Get indices of the 1'st and last hits on the track candidate |
| 316 | firstHit = (AliMUONHitForRec*) fTrackHitsPtr->First(); |
| 317 | lastHit = (AliMUONHitForRec*) fTrackHitsPtr->Last(); |
| 318 | firstIndx = fgHitForRec->IndexOf(firstHit); |
| 319 | lastIndx = fgHitForRec->IndexOf(lastHit); |
| 320 | currIndx = TMath::Abs (TMath::Max(firstIndx*iFB,lastIndx*iFB)); |
| 321 | if (Back) { |
| 322 | // backpropagation |
| 323 | currIndx = 2; |
| 324 | iDindx = 1; |
| 325 | if (fRecover != 0) { |
| 326 | // find hit with the highest Z |
| 327 | Double_t zbeg = 0; |
| 328 | for (i=0; i<fNTrackHits; i++) { |
| 329 | hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]); |
| 330 | zEnd = hitAdd->GetZ(); |
| 331 | if (zEnd > zbeg) zbeg = zEnd; |
| 332 | else { |
| 333 | currIndx = fNTrackHits - i + 2; //??? |
| 334 | break; |
| 335 | } |
| 336 | } //for (Int_t i=0; |
| 337 | } |
| 338 | } else if (fRecover != 0) { |
| 339 | Back = kTRUE; // dirty trick |
| 340 | iDindx = -1; |
| 341 | if (ichamBeg == 7 || ichamBeg == 8) currIndx = fNTrackHits - 2; |
| 342 | else { |
| 343 | Double_t zbeg = ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetZ(); |
| 344 | for (i=1; i<fNTrackHits; i++) { |
| 345 | hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]); |
| 346 | zEnd = hitAdd->GetZ(); |
| 347 | if (zEnd < zbeg) break; |
| 348 | } //for (Int_t i=1; |
| 349 | currIndx = fNTrackHits - i; //??? |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | while (ichamb>=iMin && ichamb<=iMax) { |
| 354 | // Find the closest hit in Z, not belonging to the current plane |
| 355 | if (Back) { |
| 356 | // backpropagation |
| 357 | hitAdd = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-currIndx]); |
| 358 | zEnd = hitAdd->GetZ(); |
| 359 | } else { |
| 360 | zEnd = -9999; |
| 361 | for (ihit=currIndx+iFB; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) { |
| 362 | hitAdd = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]); |
| 363 | //if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.1) { |
| 364 | if (TMath::Abs(hitAdd->GetZ()-fPosition) > 0.5) { |
| 365 | zEnd = hitAdd->GetZ(); |
| 366 | currIndx = ihit; |
| 367 | break; |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | if (zEnd<-999 && ichamb==ichamEnd) endOfProp = 1; // end-of-propagation |
| 372 | else { |
| 373 | // Check if there is a missing chamber |
| 374 | if (zEnd<-999 || TMath::Abs(hitAdd->GetChamberNumber()-ichamb) > 1) { |
| 375 | if (!Back && zEnd>-999) currIndx -= iFB; |
| 376 | ichamb += iFB; |
| 377 | zEnd = (&(fgMUON->Chamber(ichamb)))->Z(); |
| 378 | miss = kTRUE; |
| 379 | } else { |
| 380 | ichamb = hitAdd->GetChamberNumber(); |
| 381 | miss = kFALSE; |
| 382 | } |
| 383 | } |
| 384 | if (ichamb<iMin || ichamb>iMax) break; |
| 385 | // Check for missing station |
| 386 | if (!Back) { |
| 387 | dChamb = TMath::Abs(ichamb-ichambOK); |
| 388 | if (dChamb > 1) { |
| 389 | dChambMiss = endOfProp; |
| 390 | //Check if (iFB > 0) dChambMiss++; |
| 391 | if (iFB > 0) { |
| 392 | if (TMath::Odd(ichambOK)) dChambMiss++; |
| 393 | else dChambMiss--; |
| 394 | } |
| 395 | //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << endl; |
| 396 | if (TMath::Odd(ichambOK) && dChamb > 3-dChambMiss) { |
| 397 | // missing station - abandon track |
| 398 | //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl; |
| 399 | /* |
| 400 | for (Int_t i1=0; i1<fgNOfPoints; i1++) { |
| 401 | cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " "; |
| 402 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " "; |
| 403 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " "; |
| 404 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " "; |
| 405 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTHTrack() << endl; |
| 406 | } |
| 407 | //cout << endl; |
| 408 | */ |
| 409 | /* |
| 410 | cout << fNTrackHits << endl; |
| 411 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 412 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| 413 | printf(" * %d %10.4f %10.4f %10.4f", |
| 414 | hit->GetChamberNumber(), hit->GetBendingCoor(), |
| 415 | hit->GetNonBendingCoor(), hit->GetZ()); |
| 416 | if (fgEventReconstructor->GetRecGeantHits()) { |
| 417 | // from GEANT hits |
| 418 | printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack()); |
| 419 | } else { |
| 420 | // from raw clusters |
| 421 | rawclusters = fgMUON->RawClustAddress(hit->GetChamberNumber()); |
| 422 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber()); |
| 423 | printf("%3d", clus->fTracks[1]-1); |
| 424 | if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1); |
| 425 | else printf("\n"); |
| 426 | } |
| 427 | } |
| 428 | */ |
| 429 | if (fNTrackHits>2 && fRecover==0 && !(ichambOK==((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber())) { |
| 430 | // try to recover track later |
| 431 | Recover(); |
| 432 | } |
| 433 | return kFALSE; |
| 434 | } |
| 435 | //Check else if (TMath::Even(ichambOK) && dChamb > 2-endOfProp) { |
| 436 | else if (TMath::Even(ichambOK) && dChamb > 2-dChambMiss) { |
| 437 | // missing station - abandon track |
| 438 | //cout << dChamb << " " << ichambOK << " " << fgNOfPoints << " " << 1/(*fTrackPar)(4,0) << endl; |
| 439 | /* |
| 440 | for (Int_t i1=0; i1<fgNOfPoints; i1++) { |
| 441 | cout << " Hit #" << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetChamberNumber() << " "; |
| 442 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetBendingCoor() << " "; |
| 443 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetNonBendingCoor() << " "; |
| 444 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetZ() << " " << " "; |
| 445 | cout << ((AliMUONHitForRec*)((*fgHitForRec)[i1]))->GetTHTrack() << endl; |
| 446 | } |
| 447 | //cout << endl; |
| 448 | */ |
| 449 | /* |
| 450 | cout << fNTrackHits << endl; |
| 451 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 452 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| 453 | printf(" * %d %10.4f %10.4f %10.4f", |
| 454 | hit->GetChamberNumber(), hit->GetBendingCoor(), |
| 455 | hit->GetNonBendingCoor(), hit->GetZ()); |
| 456 | if (fgEventReconstructor->GetRecGeantHits()) { |
| 457 | // from GEANT hits |
| 458 | printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack()); |
| 459 | } else { |
| 460 | // from raw clusters |
| 461 | rawclusters = fgMUON->RawClustAddress(hit->GetChamberNumber()); |
| 462 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber()); |
| 463 | printf("%3d", clus->fTracks[1]-1); |
| 464 | if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1); |
| 465 | else printf("\n"); |
| 466 | } |
| 467 | } |
| 468 | */ |
| 469 | if (fNTrackHits>2 && fRecover==0 && !(ichambOK==((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber())) { |
| 470 | // try to recover track later |
| 471 | Recover(); |
| 472 | } |
| 473 | return kFALSE; |
| 474 | } |
| 475 | } |
| 476 | } |
| 477 | if (endOfProp != 0) break; |
| 478 | |
| 479 | // propagate to the found Z |
| 480 | |
| 481 | // Check if track steps into dipole |
| 482 | if (fPosition>zDipole2 && zEnd<zDipole2) { |
| 483 | //LinearPropagation(zDipole2-zBeg); |
| 484 | ParPropagation(zDipole2); |
| 485 | MSThin(1); // multiple scattering in the chamber |
| 486 | WeightPropagation(zDipole2); // propagate weight matrix |
| 487 | fPosition = fPositionNew; |
| 488 | *fTrackPar = *fTrackParNew; |
| 489 | //MagnetPropagation(zEnd); |
| 490 | ParPropagation(zEnd); |
| 491 | WeightPropagation(zEnd); |
| 492 | fPosition = fPositionNew; |
| 493 | } |
| 494 | // Check if track steps out of dipole |
| 495 | else if (fPosition>zDipole1 && zEnd<zDipole1) { |
| 496 | //MagnetPropagation(zDipole1-zBeg); |
| 497 | ParPropagation(zDipole1); |
| 498 | MSThin(1); // multiple scattering in the chamber |
| 499 | WeightPropagation(zDipole1); |
| 500 | fPosition = fPositionNew; |
| 501 | *fTrackPar = *fTrackParNew; |
| 502 | //LinearPropagation(zEnd-zDipole1); |
| 503 | ParPropagation(zEnd); |
| 504 | WeightPropagation(zEnd); |
| 505 | fPosition = fPositionNew; |
| 506 | } else { |
| 507 | ParPropagation(zEnd); |
| 508 | //MSThin(1); // multiple scattering in the chamber |
| 509 | if (TMath::Abs(zEnd-fPosition) > 5) MSThin(1); // multiple scattering in the chamber |
| 510 | WeightPropagation(zEnd); |
| 511 | fPosition = fPositionNew; |
| 512 | } |
| 513 | |
| 514 | // Add measurement |
| 515 | if (fRecover != 0 && hitAdd == fSkipHit && !miss) { |
| 516 | // recovered track - remove the hit |
| 517 | miss = kTRUE; |
| 518 | ichamb = hitAdd->GetChamberNumber(); |
| 519 | if (fRecover == 1) { |
| 520 | // remove the last hit |
| 521 | fTrackHitsPtr->Remove((TObjArray*)hitAdd); // remove hit |
| 522 | fNTrackHits --; |
| 523 | hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()-1); // unmark hit |
| 524 | } else { |
| 525 | // remove the hits |
| 526 | for (i=fNTrackHits-1; i>1; i--) { |
| 527 | hitAdd = (AliMUONHitForRec*)((*fTrackHitsPtr)[i]); |
| 528 | fTrackHitsPtr->Remove((TObjArray*)hitAdd); // remove hit |
| 529 | hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()-1); // unmark hit |
| 530 | fNTrackHits --; |
| 531 | if (hitAdd == fSkipHit) break; |
| 532 | } // for (i=fNTrackHits-1; |
| 533 | } |
| 534 | Back = kFALSE; |
| 535 | fRecover =0; // ????????? Dec-17-2001 |
| 536 | ichambOK = ((AliMUONHitForRec*)((*fTrackHitsPtr)[fNTrackHits-1]))->GetChamberNumber(); |
| 537 | currIndx = fgHitForRec->IndexOf(fSkipHit); |
| 538 | } |
| 539 | |
| 540 | if (Back && !miss) { |
| 541 | // backward propagator |
| 542 | TMatrixD pointWeight(kSize,kSize); |
| 543 | TMatrixD point(kSize,1); |
| 544 | TMatrixD trackParTmp = point; |
| 545 | point(0,0) = hitAdd->GetBendingCoor(); |
| 546 | point(1,0) = hitAdd->GetNonBendingCoor(); |
| 547 | pointWeight(0,0) = 1/hitAdd->GetBendingReso2(); |
| 548 | pointWeight(1,1) = 1/hitAdd->GetNonBendingReso2(); |
| 549 | TryPoint(point,pointWeight,trackParTmp,dChi2); |
| 550 | *fTrackPar = trackParTmp; |
| 551 | *fWeight += pointWeight; |
| 552 | fChi2 += dChi2; // Chi2 |
| 553 | if (ichamb==ichamEnd) break; |
| 554 | currIndx += iDindx; |
| 555 | } else { |
| 556 | // forward propagator |
| 557 | if (miss || !FindPoint(ichamb,zEnd,currIndx,iFB,hitAdd)) { |
| 558 | // missing point |
| 559 | *fTrackPar = *fTrackParNew; |
| 560 | } else { |
| 561 | //add point |
| 562 | fTrackHitsPtr->Add((TObjArray*)hitAdd); // add hit |
| 563 | fNTrackHits ++; |
| 564 | hitAdd->SetNTrackHits(hitAdd->GetNTrackHits()+1); // mark hit as being on track |
| 565 | ichambOK = ichamb; |
| 566 | currIndx = fgHitForRec->IndexOf(hitAdd); // Check |
| 567 | } |
| 568 | } |
| 569 | } // while |
| 570 | cout << fNTrackHits << " " << fChi2 << " " << 1/(*fTrackPar)(4,0) << " " << fPosition << endl; |
| 571 | return success; |
| 572 | } |
| 573 | |
| 574 | //__________________________________________________________________________ |
| 575 | void AliMUONTrackK::ParPropagation(Double_t zEnd) |
| 576 | { |
| 577 | // Propagation of track parameters to zEnd |
| 578 | Int_t iFB, nTries; |
| 579 | Double_t dZ, step, distance, charge; |
| 580 | Double_t vGeant3[7], vGeant3New[7]; |
| 581 | |
| 582 | nTries = 0; |
| 583 | // First step using linear extrapolation |
| 584 | dZ = zEnd - fPosition; |
| 585 | iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ); |
| 586 | step = dZ/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)); // linear estimate |
| 587 | charge = iFB*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0)); |
| 588 | fPositionNew = fPosition; |
| 589 | *fTrackParNew = *fTrackPar; |
| 590 | SetGeantParam(vGeant3,iFB); |
| 591 | |
| 592 | // Check if overstep |
| 593 | do { |
| 594 | step = TMath::Abs(step); |
| 595 | // Propagate parameters |
| 596 | extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New); |
| 597 | distance = zEnd - vGeant3New[2]; |
| 598 | step *= dZ/(vGeant3New[2]-fPositionNew); |
| 599 | nTries ++; |
| 600 | } while (distance*iFB < 0 && TMath::Abs(distance) > kEpsilon); |
| 601 | |
| 602 | GetFromGeantParam(vGeant3New,iFB); |
| 603 | |
| 604 | // Position ajustment (until within tolerance) |
| 605 | while (TMath::Abs(distance) > kEpsilon) { |
| 606 | dZ = zEnd - fPositionNew; |
| 607 | iFB = (Int_t)TMath::Sign(Double_t(1.0),dZ); |
| 608 | step = dZ/TMath::Cos((*fTrackParNew)(2,0))/TMath::Cos((*fTrackParNew)(3,0)); |
| 609 | step = TMath::Abs(step); |
| 610 | SetGeantParam(vGeant3,iFB); |
| 611 | do { |
| 612 | // binary search |
| 613 | // Propagate parameters |
| 614 | extrap_onestep_rungekutta(charge,step,vGeant3,vGeant3New); |
| 615 | distance = zEnd - vGeant3New[2]; |
| 616 | step /= 2; |
| 617 | nTries ++; |
| 618 | if (nTries > kTriesMax) { |
| 619 | cout << " ***** ParPropagation: too many tries " << nTries << endl; |
| 620 | exit(0); |
| 621 | } |
| 622 | } while (distance*iFB < 0); |
| 623 | |
| 624 | GetFromGeantParam(vGeant3New,iFB); |
| 625 | } |
| 626 | //cout << nTries << endl; |
| 627 | return; |
| 628 | } |
| 629 | /* |
| 630 | //__________________________________________________________________________ |
| 631 | void AliMUONTrackK::WeightPropagation(void) |
| 632 | { |
| 633 | // Propagation of the weight matrix |
| 634 | // W = DtWD, where D is Jacobian |
| 635 | |
| 636 | // !!! not implemented TMatrixD weight1(*fJacob,TMatrixD::kAtBA,*fWeight); // DtWD |
| 637 | TMatrixD weight1(*fWeight,TMatrixD::kMult,*fJacob); // WD |
| 638 | *fWeight = TMatrixD(*fJacob,TMatrixD::kTransposeMult,weight1); // DtWD |
| 639 | return; |
| 640 | } |
| 641 | */ |
| 642 | //__________________________________________________________________________ |
| 643 | void AliMUONTrackK::WeightPropagation(Double_t zEnd) |
| 644 | { |
| 645 | // Propagation of the weight matrix |
| 646 | // W = DtWD, where D is Jacobian |
| 647 | Int_t i, j; |
| 648 | Double_t dPar; |
| 649 | |
| 650 | TMatrixD Jacob(kSize,kSize); |
| 651 | Jacob = 0; |
| 652 | |
| 653 | // Save initial and propagated parameters |
| 654 | TMatrixD trackPar0 = *fTrackPar; |
| 655 | TMatrixD trackParNew0 = *fTrackParNew; |
| 656 | Double_t savePosition = fPositionNew; |
| 657 | |
| 658 | // Get covariance matrix |
| 659 | *fCovariance = *fWeight; |
| 660 | // check whether the Invert method returns flag if matrix cannot be inverted, |
| 661 | // and do not calculate the Determinant in that case !!!! |
| 662 | if (fCovariance->Determinant() != 0) { |
| 663 | // fCovariance->Invert(); |
| 664 | Int_t ifailCov; |
| 665 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 666 | } else { |
| 667 | cout << " ***** Warning in WeightPropagation: Determinant fCovariance=0:" << endl; |
| 668 | } |
| 669 | |
| 670 | // Loop over parameters to find change of the initial vs propagated ones |
| 671 | zEnd = fPosition; |
| 672 | fPosition = fPositionNew; |
| 673 | for (i=0; i<kSize; i++) { |
| 674 | dPar = TMath::Sqrt((*fCovariance)(i,i)); |
| 675 | *fTrackPar = trackParNew0; |
| 676 | (*fTrackPar)(i,0) += dPar; |
| 677 | ParPropagation(zEnd); |
| 678 | for (j=0; j<kSize; j++) { |
| 679 | Jacob(j,i) = ((*fTrackParNew)(j,0)-trackPar0(j,0))/dPar; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | //Jacob->Print(); |
| 684 | //trackParNew0.Print(); |
| 685 | //TMatrixD par1(Jacob,TMatrixD::kMult,trackPar0); // |
| 686 | //par1.Print(); |
| 687 | /* |
| 688 | if (Jacob.Determinant() != 0) { |
| 689 | // Jacob.Invert(); |
| 690 | } else { |
| 691 | cout << " ***** Warning in WeightPropagation: Determinant Jacob=0:" << endl; |
| 692 | } |
| 693 | */ |
| 694 | TMatrixD weight1(*fWeight,TMatrixD::kMult,Jacob); // WD |
| 695 | *fWeight = TMatrixD(Jacob,TMatrixD::kTransposeMult,weight1); // DtWD |
| 696 | //fWeight->Print(); |
| 697 | |
| 698 | // Restore initial and propagated parameters |
| 699 | *fTrackPar = trackPar0; |
| 700 | *fTrackParNew = trackParNew0; |
| 701 | fPosition = zEnd; |
| 702 | fPositionNew = savePosition; |
| 703 | return; |
| 704 | } |
| 705 | |
| 706 | //__________________________________________________________________________ |
| 707 | Bool_t AliMUONTrackK::FindPoint(Int_t ichamb, Double_t zEnd, Int_t currIndx, Int_t iFB, AliMUONHitForRec *&hitAdd) |
| 708 | { |
| 709 | // Picks up point within a window for the chamber No ichamb |
| 710 | // Split the track if there are more than 1 hit |
| 711 | Int_t ihit, nRecTracks; |
| 712 | Double_t WindowB, WindowNonB, dChi2Tmp=0, dChi2, y, x, savePosition=0; |
| 713 | TClonesArray *trackPtr; |
| 714 | AliMUONHitForRec *hit, *hitLoop; |
| 715 | AliMUONTrackK *trackK; |
| 716 | |
| 717 | Bool_t Ok = kFALSE; |
| 718 | //sigmaB = fgEventReconstructor->GetBendingResolution(); // bending resolution |
| 719 | //sigmaNonB = fgEventReconstructor->GetNonBendingResolution(); // non-bending resolution |
| 720 | *fCovariance = *fWeight; |
| 721 | // check whether the Invert method returns flag if matrix cannot be inverted, |
| 722 | // and do not calculate the Determinant in that case !!!! |
| 723 | if (fCovariance->Determinant() != 0) { |
| 724 | // fCovariance->Invert(); |
| 725 | |
| 726 | Int_t ifailCov; |
| 727 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 728 | } else { |
| 729 | cout << " ***** Warning in FindPoint: Determinant fCovariance=0:" << endl; |
| 730 | } |
| 731 | //WindowB = kNSigma*TMath::Sqrt((*fCovariance)(0,0)+sigmaB*sigmaB); |
| 732 | //WindowNonB = kNSigma*TMath::Sqrt((*fCovariance)(1,1)+sigmaNonB*sigmaNonB); |
| 733 | // Loop over all hits and take hits from the chamber |
| 734 | TMatrixD pointWeight(kSize,kSize); |
| 735 | TMatrixD saveWeight = pointWeight; |
| 736 | TMatrixD pointWeightTmp = pointWeight; |
| 737 | TMatrixD point(kSize,1); |
| 738 | TMatrixD trackPar = point; |
| 739 | TMatrixD trackParTmp = point; |
| 740 | Int_t nHitsOK = 0; |
| 741 | |
| 742 | for (ihit=currIndx; ihit>=0 && ihit<fgNOfPoints; ihit+=iFB) { |
| 743 | hit = (AliMUONHitForRec*) ((*fgHitForRec)[ihit]); |
| 744 | if (hit->GetChamberNumber() == ichamb) { |
| 745 | //if (TMath::Abs(hit->GetZ()-zEnd) < 0.1) { |
| 746 | if (TMath::Abs(hit->GetZ()-zEnd) < 0.5) { |
| 747 | if (TMath::Abs(hit->GetZ()-zEnd) > 0.1) { |
| 748 | // adjust position: for multiple hits in the chamber |
| 749 | // (mostly (only?) for GEANT hits) |
| 750 | zEnd = hit->GetZ(); |
| 751 | *fTrackPar = *fTrackParNew; |
| 752 | ParPropagation(zEnd); |
| 753 | WeightPropagation(zEnd); |
| 754 | fPosition = fPositionNew; |
| 755 | *fTrackPar = *fTrackParNew; |
| 756 | // Get covariance |
| 757 | *fCovariance = *fWeight; |
| 758 | if (fCovariance->Determinant() != 0) { |
| 759 | //fCovariance->Invert(); |
| 760 | Int_t ifailCov; |
| 761 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 762 | } else { |
| 763 | cout << " ***** Warning in FindPoint: Determinant fCovariance=0:" << endl; |
| 764 | } |
| 765 | } |
| 766 | y = hit->GetBendingCoor(); |
| 767 | x = hit->GetNonBendingCoor(); |
| 768 | WindowB = kNSigma*TMath::Sqrt((*fCovariance)(0,0)+hit->GetBendingReso2()); |
| 769 | WindowNonB = kNSigma*TMath::Sqrt((*fCovariance)(1,1)+hit->GetNonBendingReso2()); |
| 770 | if (TMath::Abs((*fTrackParNew)(0,0)-y) <= WindowB && |
| 771 | TMath::Abs((*fTrackParNew)(1,0)-x) <= WindowNonB) { |
| 772 | // Vector of measurements and covariance matrix |
| 773 | point.Zero(); |
| 774 | point(0,0) = y; |
| 775 | point(1,0) = x; |
| 776 | pointWeight(0,0) = 1/hit->GetBendingReso2(); |
| 777 | pointWeight(1,1) = 1/hit->GetNonBendingReso2(); |
| 778 | TryPoint(point,pointWeight,trackPar,dChi2); |
| 779 | if (TMath::Abs(1./(trackPar)(4,0)) < fgEventReconstructor->GetMinBendingMomentum()) continue; // p < p_min - next hit |
| 780 | Ok = kTRUE; |
| 781 | nHitsOK++; |
| 782 | //if (nHitsOK > -1) { |
| 783 | if (nHitsOK == 1) { |
| 784 | // Save current members |
| 785 | saveWeight = *fWeight; |
| 786 | savePosition = fPosition; |
| 787 | // temporary storage for the current track |
| 788 | dChi2Tmp = dChi2; |
| 789 | trackParTmp = trackPar; |
| 790 | pointWeightTmp = pointWeight; |
| 791 | hitAdd = hit; |
| 792 | } else { |
| 793 | // branching: create a new track |
| 794 | trackPtr = fgEventReconstructor->GetRecTracksPtr(); |
| 795 | nRecTracks = fgEventReconstructor->GetNRecTracks(); |
| 796 | trackK = new ((*trackPtr)[nRecTracks]) |
| 797 | AliMUONTrackK(*this); // dummy copy constructor |
| 798 | *trackK = *this; |
| 799 | fgEventReconstructor->SetNRecTracks(nRecTracks+1); |
| 800 | //cout << " ******** New track: " << ichamb << " " << hit->GetTHTrack() << " " << 1/(trackPar)(4,0) << " " << hit->GetBendingCoor() << " " << fNTrackHits << " " << nRecTracks << endl; |
| 801 | trackK->fRecover = 0; |
| 802 | *(trackK->fTrackPar) = trackPar; |
| 803 | *(trackK->fWeight) += pointWeight; |
| 804 | trackK->fChi2 += dChi2; |
| 805 | // Mark hits as being on 2 tracks |
| 806 | for (Int_t i=0; i<fNTrackHits; i++) { |
| 807 | hitLoop = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i]); |
| 808 | hitLoop->SetNTrackHits(hitLoop->GetNTrackHits()+1); |
| 809 | /* |
| 810 | cout << " ** "; |
| 811 | cout << hitLoop->GetChamberNumber() << " "; |
| 812 | cout << hitLoop->GetBendingCoor() << " "; |
| 813 | cout << hitLoop->GetNonBendingCoor() << " "; |
| 814 | cout << hitLoop->GetZ() << " " << " "; |
| 815 | cout << hitLoop->GetGeantSignal() << " " << " "; |
| 816 | cout << hitLoop->GetTHTrack() << endl; |
| 817 | printf(" ** %d %10.4f %10.4f %10.4f %d %d \n", |
| 818 | hitLoop->GetChamberNumber(), hitLoop->GetBendingCoor(), |
| 819 | hitLoop->GetNonBendingCoor(), hitLoop->GetZ(), |
| 820 | hitLoop->GetGeantSignal(), hitLoop->GetTHTrack()); |
| 821 | */ |
| 822 | } |
| 823 | //add point |
| 824 | trackK->fTrackHitsPtr->Add((TObjArray*)hit); // add hit |
| 825 | trackK->fNTrackHits ++; |
| 826 | hit->SetNTrackHits(hit->GetNTrackHits()+1); // mark hit as being on track |
| 827 | if (ichamb == 9) { |
| 828 | // the last chamber |
| 829 | trackK->fTrackDir = -1; |
| 830 | trackK->fBPFlag = kTRUE; |
| 831 | } |
| 832 | } |
| 833 | } |
| 834 | } |
| 835 | } else break; // different chamber |
| 836 | } // for (ihit=currIndx; |
| 837 | if (Ok) { |
| 838 | *fTrackPar = trackParTmp; |
| 839 | *fWeight = saveWeight; |
| 840 | *fWeight += pointWeightTmp; |
| 841 | fChi2 += dChi2Tmp; // Chi2 |
| 842 | // Restore members |
| 843 | fPosition = savePosition; |
| 844 | } |
| 845 | return Ok; |
| 846 | } |
| 847 | |
| 848 | //__________________________________________________________________________ |
| 849 | void AliMUONTrackK::TryPoint(TMatrixD &point, const TMatrixD &pointWeight, TMatrixD &trackParTmp, Double_t &dChi2) |
| 850 | { |
| 851 | // Adds a measurement point (modifies track parameters and computes |
| 852 | // change of Chi2) |
| 853 | |
| 854 | // Solving linear system (W+U)p' = U(m-p) + (W+U)p |
| 855 | TMatrixD wu = *fWeight; |
| 856 | wu += pointWeight; // W+U |
| 857 | trackParTmp = point; |
| 858 | trackParTmp -= *fTrackParNew; // m-p |
| 859 | TMatrixD right(pointWeight,TMatrixD::kMult,trackParTmp); // U(m-p) |
| 860 | TMatrixD right1(wu,TMatrixD::kMult,*fTrackParNew); // (W+U)p |
| 861 | right += right1; // U(m-p) + (W+U)p |
| 862 | |
| 863 | // check whether the Invert method returns flag if matrix cannot be inverted, |
| 864 | // and do not calculate the Determinant in that case !!!! |
| 865 | if (wu.Determinant() != 0) { |
| 866 | |
| 867 | // wu.Invert(); |
| 868 | Int_t ifailWU; |
| 869 | mnvertLocalK(&((wu)(0,0)), kSize,kSize,kSize,ifailWU); |
| 870 | } else { |
| 871 | cout << " ***** Warning in TryPoint: Determinant wu=0:" << endl; |
| 872 | } |
| 873 | trackParTmp = TMatrixD(wu,TMatrixD::kMult,right); |
| 874 | |
| 875 | right1 = trackParTmp; |
| 876 | right1 -= point; // p'-m |
| 877 | point = trackParTmp; |
| 878 | point -= *fTrackParNew; // p'-p |
| 879 | right = TMatrixD(*fWeight,TMatrixD::kMult,point); // W(p'-p) |
| 880 | TMatrixD value(point,TMatrixD::kTransposeMult,right); // (p'-p)'W(p'-p) |
| 881 | dChi2 = value(0,0); |
| 882 | right = TMatrixD(pointWeight,TMatrixD::kMult,right1); // U(p'-m) |
| 883 | value = TMatrixD(right1,TMatrixD::kTransposeMult,right); // (p'-m)'U(p'-m) |
| 884 | dChi2 += value(0,0); |
| 885 | return; |
| 886 | } |
| 887 | |
| 888 | //__________________________________________________________________________ |
| 889 | void AliMUONTrackK::MSThin(Int_t sign) |
| 890 | { |
| 891 | // Adds multiple scattering in a thin layer (only angles are affected) |
| 892 | Double_t cosAlph, cosBeta, momentum, velo, path, theta0; |
| 893 | |
| 894 | // check whether the Invert method returns flag if matrix cannot be inverted, |
| 895 | // and do not calculate the Determinant in that case !!!! |
| 896 | if (fWeight->Determinant() != 0) { |
| 897 | //fWeight->Invert(); // covariance |
| 898 | |
| 899 | Int_t ifailWeight; |
| 900 | mnvertLocalK(&((*fWeight)(0,0)), kSize,kSize,kSize,ifailWeight); |
| 901 | } else { |
| 902 | cout << " ***** Warning in MSThin: Determinant fWeight=0:" << endl; |
| 903 | } |
| 904 | |
| 905 | cosAlph = TMath::Cos((*fTrackParNew)(2,0)); |
| 906 | cosBeta = TMath::Cos((*fTrackParNew)(3,0)); |
| 907 | momentum = 1/(*fTrackParNew)(4,0); // particle momentum |
| 908 | //velo = momentum/TMath::Sqrt(momentum*momentum+muonMass*muonMass); // velocity/c for muon hypothesis |
| 909 | velo = 1; // relativistic |
| 910 | path = fgEventReconstructor->GetChamberThicknessInX0()/cosAlph/cosBeta; // path length |
| 911 | theta0 = 0.0136/velo/momentum*TMath::Sqrt(path)*(1+0.038*TMath::Log(path)); // projected scattering angle |
| 912 | |
| 913 | (*fWeight)(2,2) += sign*theta0/cosBeta*theta0/cosBeta; // alpha |
| 914 | (*fWeight)(3,3) += sign*theta0*theta0; // beta |
| 915 | //fWeight->Invert(); // weight |
| 916 | |
| 917 | Int_t ifailWeight; |
| 918 | mnvertLocalK(&((*fWeight)(0,0)), kSize,kSize,kSize,ifailWeight); |
| 919 | return; |
| 920 | } |
| 921 | //__________________________________________________________________________ |
| 922 | void AliMUONTrackK::StartBack(void) |
| 923 | { |
| 924 | // Starts backpropagator |
| 925 | |
| 926 | fBPFlag = kTRUE; |
| 927 | fChi2 = 0; |
| 928 | for (Int_t i=0; i<kSize; i++) { |
| 929 | for (Int_t j=0; j<kSize; j++) { |
| 930 | if (j==i) (*fWeight)(i,i) /= 100; |
| 931 | //if (j==i) (*fWeight)(i,i) /= fNTrackHits*fNTrackHits; |
| 932 | else (*fWeight)(j,i) = 0; |
| 933 | } |
| 934 | } |
| 935 | } |
| 936 | |
| 937 | //__________________________________________________________________________ |
| 938 | void AliMUONTrackK::SetGeantParam(Double_t *VGeant3, Int_t iFB) |
| 939 | { |
| 940 | // Set vector of Geant3 parameters pointed to by "VGeant3" |
| 941 | // from track parameters |
| 942 | |
| 943 | VGeant3[0] = (*fTrackParNew)(1,0); // X |
| 944 | VGeant3[1] = (*fTrackParNew)(0,0); // Y |
| 945 | VGeant3[2] = fPositionNew; // Z |
| 946 | VGeant3[3] = iFB*TMath::Sin((*fTrackParNew)(3,0)); // Px/Ptot |
| 947 | VGeant3[4] = iFB*TMath::Cos((*fTrackParNew)(3,0))*TMath::Sin((*fTrackParNew)(2,0)); // Py/Ptot |
| 948 | VGeant3[5] = iFB*TMath::Sqrt(1.0-VGeant3[3]*VGeant3[3]-VGeant3[4]*VGeant3[4]); // Pz/Ptot |
| 949 | VGeant3[6] = 1/TMath::Abs((*fTrackParNew)(4,0)); // Ptot |
| 950 | } |
| 951 | |
| 952 | //__________________________________________________________________________ |
| 953 | void AliMUONTrackK::GetFromGeantParam(Double_t *VGeant3, Int_t iFB) |
| 954 | { |
| 955 | // Get track parameters from vector of Geant3 parameters pointed |
| 956 | // to by "VGeant3" |
| 957 | |
| 958 | fPositionNew = VGeant3[2]; // Z |
| 959 | (*fTrackParNew)(0,0) = VGeant3[1]; // Y |
| 960 | (*fTrackParNew)(1,0) = VGeant3[0]; // X |
| 961 | (*fTrackParNew)(3,0) = TMath::ASin(iFB*VGeant3[3]); // beta |
| 962 | (*fTrackParNew)(2,0) = TMath::ASin(iFB*VGeant3[4]/TMath::Cos((*fTrackParNew)(3,0))); // alpha |
| 963 | (*fTrackParNew)(4,0) = 1/VGeant3[6]*TMath::Sign(Double_t(1.0),(*fTrackPar)(4,0)); // 1/Ptot |
| 964 | } |
| 965 | |
| 966 | //__________________________________________________________________________ |
| 967 | void AliMUONTrackK::SetTrackQuality(Int_t iChi2) |
| 968 | { |
| 969 | // Computes "track quality" from Chi2 (if iChi2==0) or vice versa |
| 970 | |
| 971 | if (fChi2 > 250) { |
| 972 | cout << " ***** Too high Chi2: " << fChi2 << endl; |
| 973 | fChi2 = 250; |
| 974 | // exit(0); |
| 975 | } |
| 976 | if (iChi2 == 0) fChi2 = fNTrackHits + (250.-fChi2)/251; |
| 977 | else fChi2 = 250 - (fChi2-fNTrackHits)*251; |
| 978 | } |
| 979 | |
| 980 | //__________________________________________________________________________ |
| 981 | Int_t AliMUONTrackK::Compare(const TObject* trackK) const |
| 982 | { |
| 983 | // "Compare" function to sort with decreasing "track quality". |
| 984 | // Returns +1 (0, -1) if quality of current track |
| 985 | // is smaller than (equal to, larger than) quality of trackK |
| 986 | |
| 987 | if (fChi2 < ((AliMUONTrackK*)trackK)->fChi2) return(+1); |
| 988 | else if (fChi2 == ((AliMUONTrackK*)trackK)->fChi2) return(0); |
| 989 | else return(-1); |
| 990 | } |
| 991 | |
| 992 | //__________________________________________________________________________ |
| 993 | Bool_t AliMUONTrackK::KeepTrack(AliMUONTrackK* track0) |
| 994 | { |
| 995 | // Check whether or not to keep current track |
| 996 | // (keep, if it has less than half of common hits with track0) |
| 997 | Int_t hitsInCommon, nHits0, i, j, nTrackHits2; |
| 998 | AliMUONHitForRec *hit0, *hit1; |
| 999 | |
| 1000 | hitsInCommon = 0; |
| 1001 | nHits0 = track0->fNTrackHits; |
| 1002 | nTrackHits2 = fNTrackHits/2; |
| 1003 | |
| 1004 | for (i=0; i<nHits0; i++) { |
| 1005 | // Check if hit belongs to several tracks |
| 1006 | hit0 = (AliMUONHitForRec*) (*track0->fTrackHitsPtr)[i]; |
| 1007 | if (hit0->GetNTrackHits() == 1) continue; |
| 1008 | for (j=0; j<fNTrackHits; j++) { |
| 1009 | hit1 = (AliMUONHitForRec*) (*fTrackHitsPtr)[j]; |
| 1010 | if (hit1->GetNTrackHits() == 1) continue; |
| 1011 | if (hit0 == hit1) { |
| 1012 | hitsInCommon++; |
| 1013 | if (hitsInCommon >= nTrackHits2) return kFALSE; |
| 1014 | break; |
| 1015 | } |
| 1016 | } // for (j=0; |
| 1017 | } // for (i=0; |
| 1018 | return kTRUE; |
| 1019 | } |
| 1020 | |
| 1021 | //__________________________________________________________________________ |
| 1022 | void AliMUONTrackK::Kill(void) |
| 1023 | { |
| 1024 | // Kill track candidate |
| 1025 | Int_t i; |
| 1026 | AliMUONHitForRec *hit; |
| 1027 | |
| 1028 | if (fTrackHitsPtr) { |
| 1029 | // Remove track mark from hits |
| 1030 | for (i=0; i<fNTrackHits; i++) { |
| 1031 | hit = (AliMUONHitForRec*) (*fTrackHitsPtr)[i]; |
| 1032 | hit->SetNTrackHits(hit->GetNTrackHits()-1); |
| 1033 | } |
| 1034 | } |
| 1035 | fgEventReconstructor->GetRecTracksPtr()->Remove(this); |
| 1036 | } |
| 1037 | |
| 1038 | //__________________________________________________________________________ |
| 1039 | void AliMUONTrackK::Branson(void) |
| 1040 | { |
| 1041 | // Propagates track to the vertex thru absorber using Branson correction |
| 1042 | // (makes use of the AliMUONTrackParam class) |
| 1043 | |
| 1044 | AliMUONTrackParam *trackParam = new AliMUONTrackParam(); |
| 1045 | trackParam->SetBendingCoor((*fTrackPar)(0,0)); |
| 1046 | trackParam->SetNonBendingCoor((*fTrackPar)(1,0)); |
| 1047 | trackParam->SetBendingSlope(TMath::Tan((*fTrackPar)(2,0))); |
| 1048 | trackParam->SetNonBendingSlope(TMath::Tan((*fTrackPar)(3,0))/TMath::Cos((*fTrackPar)(2,0))); |
| 1049 | trackParam->SetInverseBendingMomentum((*fTrackPar)(4,0)/TMath::Cos((*fTrackPar)(3,0))); |
| 1050 | trackParam->SetZ(fPosition); |
| 1051 | |
| 1052 | trackParam->ExtrapToVertex(); |
| 1053 | |
| 1054 | (*fTrackPar)(0,0) = trackParam->GetBendingCoor(); |
| 1055 | (*fTrackPar)(1,0) = trackParam->GetNonBendingCoor(); |
| 1056 | (*fTrackPar)(2,0) = TMath::ATan(trackParam->GetBendingSlope()); |
| 1057 | (*fTrackPar)(3,0) = TMath::ATan(TMath::Cos((*fTrackPar)(2,0))*trackParam->GetNonBendingSlope()); |
| 1058 | (*fTrackPar)(4,0) = TMath::Cos((*fTrackPar)(3,0))*trackParam->GetInverseBendingMomentum(); |
| 1059 | fPosition = trackParam->GetZ(); |
| 1060 | delete trackParam; |
| 1061 | cout << 1/(*fTrackPar)(4,0) << " " << fPosition << " " << (*fTrackPar)(0,0) << endl; |
| 1062 | |
| 1063 | // Get covariance matrix |
| 1064 | *fCovariance = *fWeight; |
| 1065 | if (fCovariance->Determinant() != 0) { |
| 1066 | // fCovariance->Invert(); |
| 1067 | |
| 1068 | Int_t ifailCov; |
| 1069 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 1070 | } else { |
| 1071 | cout << " ***** Warning in Branson: Determinant fCovariance=0:" << endl; |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | //__________________________________________________________________________ |
| 1076 | void AliMUONTrackK::GoToZ(Double_t zEnd) |
| 1077 | { |
| 1078 | // Propagates track to given Z |
| 1079 | |
| 1080 | ParPropagation(zEnd); |
| 1081 | MSThin(1); // multiple scattering in the chamber |
| 1082 | WeightPropagation(zEnd); |
| 1083 | fPosition = fPositionNew; |
| 1084 | *fTrackPar = *fTrackParNew; |
| 1085 | } |
| 1086 | |
| 1087 | //__________________________________________________________________________ |
| 1088 | void AliMUONTrackK::GoToVertex(void) |
| 1089 | { |
| 1090 | // Version 3.08 |
| 1091 | // Propagates track to the vertex |
| 1092 | // All material constants are taken from AliRoot |
| 1093 | |
| 1094 | static Double_t x01[5] = { 24.282, // C |
| 1095 | 24.282, // C |
| 1096 | 11.274, // Concrete |
| 1097 | 1.758, // Fe |
| 1098 | 1.758}; // Fe (cm) |
| 1099 | // inner part theta < 3 degrees |
| 1100 | static Double_t x02[5] = { 30413, // Air |
| 1101 | 24.282, // C |
| 1102 | 11.274, // Concrete |
| 1103 | 1.758, // Fe |
| 1104 | 0.369}; // W (cm) |
| 1105 | // z positions of the materials inside the absober outer part theta > 3 degres |
| 1106 | static Double_t zPos[10] = {90, 105, 315, 443, 468}; |
| 1107 | // R > 1 |
| 1108 | // R < 1 |
| 1109 | |
| 1110 | Double_t dZ, r0Norm, X0, deltaP, dChi2, pTotal, pOld; |
| 1111 | AliMUONHitForRec *hit; |
| 1112 | AliMUONRawCluster *clus; |
| 1113 | TClonesArray *rawclusters; |
| 1114 | |
| 1115 | // First step to the rear end of the absorber |
| 1116 | Double_t zRear = 503; |
| 1117 | GoToZ(zRear); |
| 1118 | Double_t tan3 = TMath::Tan(3./180*TMath::Pi()); |
| 1119 | |
| 1120 | // Go through absorber |
| 1121 | pOld = 1/(*fTrackPar)(4,0); |
| 1122 | Double_t r0Rear = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) + |
| 1123 | (*fTrackPar)(1,0)*(*fTrackPar)(1,0); |
| 1124 | r0Rear = TMath::Sqrt(r0Rear)/fPosition/tan3; |
| 1125 | r0Norm = r0Rear; |
| 1126 | for (Int_t i=4; i>=0; i--) { |
| 1127 | ParPropagation(zPos[i]); |
| 1128 | WeightPropagation(zPos[i]); |
| 1129 | dZ = TMath::Abs (fPositionNew-fPosition); |
| 1130 | if (r0Norm > 1) X0 = x01[i]; |
| 1131 | else X0 = x02[i]; |
| 1132 | MSLine(dZ,X0); // multiple scattering in the medium (linear approximation) |
| 1133 | fPosition = fPositionNew; |
| 1134 | *fTrackPar = *fTrackParNew; |
| 1135 | r0Norm = (*fTrackPar)(0,0)*(*fTrackPar)(0,0) + |
| 1136 | (*fTrackPar)(1,0)*(*fTrackPar)(1,0); |
| 1137 | r0Norm = TMath::Sqrt(r0Norm)/fPosition/tan3; |
| 1138 | } |
| 1139 | // Correct momentum for energy losses |
| 1140 | pTotal = 1/TMath::Abs((*fTrackPar)(4,0)); |
| 1141 | Double_t p0 = pTotal; |
| 1142 | for (Int_t j=0; j<2; j++) { |
| 1143 | /* |
| 1144 | if (r0Rear > 1) { |
| 1145 | if (p0 < 20) { |
| 1146 | deltaP = 2.164 + 0.145e-1*p0 - 0.417e-3*p0*p0; |
| 1147 | } else { |
| 1148 | deltaP = 2.275 + 0.102e-2*p0 - 0.674e-6*p0*p0; |
| 1149 | } |
| 1150 | } else { |
| 1151 | if (p0 < 20) { |
| 1152 | deltaP = 2.581 + 0.188e-1*p0 - 0.398e-3*p0*p0; |
| 1153 | } else { |
| 1154 | deltaP = 2.727 + 0.356e-2*p0 + 0.242e-5*p0*p0; |
| 1155 | } |
| 1156 | } |
| 1157 | */ |
| 1158 | if (r0Rear < 1) { |
| 1159 | //W |
| 1160 | if (p0<15) { |
| 1161 | deltaP = 2.737 + 0.0494*p0 - 0.001123*p0*p0; |
| 1162 | } else { |
| 1163 | deltaP = 3.0643 + 0.01346*p0; |
| 1164 | } |
| 1165 | } else { |
| 1166 | //Pb |
| 1167 | if (p0<15) { |
| 1168 | deltaP = 2.1380 + 0.0351*p0 - 0.000853*p0*p0; |
| 1169 | } else { |
| 1170 | deltaP = 2.407 + 0.00702*p0; |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | p0 = pTotal + deltaP/TMath::Cos((*fTrackPar)(2,0))/TMath::Cos((*fTrackPar)(3,0)); |
| 1175 | } |
| 1176 | (*fTrackPar)(4,0) = 1/p0*TMath::Sign((Double_t)1.,(*fTrackPar)(4,0)); |
| 1177 | |
| 1178 | // Go to the vertex |
| 1179 | ParPropagation((Double_t)0.); |
| 1180 | WeightPropagation((Double_t)0.); |
| 1181 | fPosition = fPositionNew; |
| 1182 | //*fTrackPar = *fTrackParNew; |
| 1183 | // Add vertex as a hit |
| 1184 | TMatrixD pointWeight(kSize,kSize); |
| 1185 | TMatrixD point(kSize,1); |
| 1186 | TMatrixD trackParTmp = point; |
| 1187 | point(0,0) = 0; // vertex coordinate - should be taken somewhere |
| 1188 | point(1,0) = 0; // vertex coordinate - should be taken somewhere |
| 1189 | pointWeight(0,0) = 1/1.e-3/1.e-3; // 10 um error |
| 1190 | pointWeight(1,1) = 1/1.e-3/1.e-3; // 10 um error |
| 1191 | TryPoint(point,pointWeight,trackParTmp,dChi2); |
| 1192 | *fTrackPar = trackParTmp; |
| 1193 | *fWeight += pointWeight; |
| 1194 | fChi2 += dChi2; // Chi2 |
| 1195 | cout << pOld << " " << 1/(*fTrackPar)(4,0) << " " << dChi2 << " " << fChi2 << " " << fNTrackHits << endl; |
| 1196 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1197 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| 1198 | printf ("%4d", hit->GetChamberNumber()); |
| 1199 | //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetChamberNumber() << " "; |
| 1200 | } |
| 1201 | cout << endl; |
| 1202 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1203 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| 1204 | //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " "; |
| 1205 | //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " "; |
| 1206 | printf ("%4d", fgHitForRec->IndexOf(hit)); |
| 1207 | //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " "; |
| 1208 | } |
| 1209 | cout << endl; |
| 1210 | if (fgEventReconstructor->GetRecGeantHits()) { |
| 1211 | // from GEANT hits |
| 1212 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1213 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| 1214 | cout << hit->GetTHTrack() + hit->GetGeantSignal()*10000 << " "; |
| 1215 | } |
| 1216 | } else { |
| 1217 | // from raw clusters |
| 1218 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1219 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| ce3f5e87 |
1220 | rawclusters = fgMUON->GetMUONData()->RawClusters(hit->GetChamberNumber()); |
| 83dbc640 |
1221 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber()); |
| 1222 | printf ("%4d", clus->fTracks[1] - 1); |
| 1223 | //cout << clus->fTracks[1] - 1 << " "; |
| 1224 | } |
| 1225 | cout << endl; |
| 1226 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1227 | hit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[i1]); |
| ce3f5e87 |
1228 | rawclusters = fgMUON->GetMUONData()->RawClusters(hit->GetChamberNumber()); |
| 83dbc640 |
1229 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit->GetHitNumber()); |
| 1230 | if (clus->fTracks[2] != 0) printf ("%4d", clus->fTracks[2] - 1); |
| 1231 | else printf ("%4s", " "); |
| 1232 | //if (clus->fTracks[2] != 0) cout << clus->fTracks[2] - 1 << " "; |
| 1233 | } |
| 1234 | } |
| 1235 | cout << endl; |
| 1236 | for (Int_t i1=0; i1<fNTrackHits; i1++) { |
| 1237 | //cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetHitNumber() << " "; |
| 1238 | cout << ((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))->GetZ() << " "; |
| 1239 | //cout << fgHitForRec->IndexOf(((AliMUONHitForRec*)((*fTrackHitsPtr)[i1]))) << " "; |
| 1240 | } |
| 1241 | cout << endl; |
| 1242 | cout << "---------------------------------------------------" << endl; |
| 1243 | |
| 1244 | // Get covariance matrix |
| 1245 | *fCovariance = *fWeight; |
| 1246 | if (fCovariance->Determinant() != 0) { |
| 1247 | // fCovariance->Invert(); |
| 1248 | |
| 1249 | Int_t ifailCov; |
| 1250 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 1251 | } else { |
| 1252 | cout << " ***** Warning in GoToVertex: Determinant fCovariance=0:" << endl; |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | //__________________________________________________________________________ |
| 1257 | void AliMUONTrackK::MSLine(Double_t dZ, Double_t X0) |
| 1258 | { |
| 1259 | // Adds multiple scattering in a thick layer for linear propagation |
| 1260 | |
| 1261 | Double_t cosAlph = TMath::Cos((*fTrackPar)(2,0)); |
| 1262 | Double_t tanAlph = TMath::Tan((*fTrackPar)(2,0)); |
| 1263 | Double_t cosBeta = TMath::Cos((*fTrackPar)(3,0)); |
| 1264 | Double_t sinBeta; |
| 1265 | sinBeta = TMath::Sin((*fTrackPar)(3,0)); |
| 1266 | Double_t tanBeta = TMath::Tan((*fTrackPar)(3,0)); |
| 1267 | Double_t momentum = 1/(*fTrackPar)(4,0); |
| 1268 | Double_t velo = 1; // relativistic velocity |
| 1269 | Double_t step = TMath::Abs(dZ)/cosAlph/cosBeta; // step length |
| 1270 | |
| 1271 | // Projected scattering angle |
| 1272 | Double_t theta0 = 0.0136/velo/momentum/TMath::Sqrt(X0)*(1+0.038*TMath::Log(step/X0)); |
| 1273 | Double_t theta02 = theta0*theta0; |
| 1274 | Double_t dl2 = step*step/2*theta02; |
| 1275 | Double_t dl3 = dl2*step*2/3; |
| 1276 | |
| 1277 | //Derivatives |
| 1278 | Double_t dYdT = 1/cosAlph; |
| 1279 | Double_t dYdB = 0; //(*fTrackPar)(2,0)*sinBeta/cosAlph; |
| 1280 | Double_t dXdT = tanAlph*tanBeta; |
| 1281 | //Double_t dXdB = (1+(*fTrackPar)(2,0)*tanAlph*sinBeta*sinBeta)/cosBeta; |
| 1282 | Double_t dXdB = 1/cosBeta; |
| 1283 | Double_t dAdT = 1/cosBeta; |
| 1284 | Double_t dAdB = 0; //(*fTrackPar)(2,0)*tanBeta; |
| 1285 | |
| 1286 | // Get covariance matrix |
| 1287 | *fCovariance = *fWeight; |
| 1288 | if (fCovariance->Determinant() != 0) { |
| 1289 | // fCovariance->Invert(); |
| 1290 | |
| 1291 | Int_t ifailCov; |
| 1292 | mnvertLocalK(&((*fCovariance)(0,0)), kSize,kSize,kSize,ifailCov); |
| 1293 | } else { |
| 1294 | cout << " ***** Warning in MSLine: Determinant fCovariance=0:" << endl; |
| 1295 | } |
| 1296 | |
| 1297 | (*fCovariance)(0,0) += dl3*(dYdT*dYdT+dYdB*dYdB); // <yy> |
| 1298 | (*fCovariance)(1,1) += dl3*(dXdT*dXdT+dXdB*dXdB); // <xx> |
| 1299 | (*fCovariance)(2,2) += theta02*step*(dAdT*dAdT+dAdB*dAdB); // <aa> |
| 1300 | (*fCovariance)(3,3) += theta02*step; // <bb> |
| 1301 | |
| 1302 | (*fCovariance)(0,1) += dl3*(dYdT*dXdT+dYdB*dXdB); // <yx> |
| 1303 | (*fCovariance)(1,0) = (*fCovariance)(0,1); |
| 1304 | |
| 1305 | (*fCovariance)(0,2) += dl2*(dYdT*dAdT+dYdB*dAdB); // <ya> |
| 1306 | (*fCovariance)(2,0) = (*fCovariance)(0,2); |
| 1307 | |
| 1308 | (*fCovariance)(0,3) += dl2*dYdB; // <yb> |
| 1309 | (*fCovariance)(3,0) = (*fCovariance)(0,3); |
| 1310 | |
| 1311 | (*fCovariance)(1,2) += dl2*(dXdT*dAdT+dXdB*dAdB); // <xa> |
| 1312 | (*fCovariance)(2,1) = (*fCovariance)(1,2); |
| 1313 | |
| 1314 | (*fCovariance)(1,3) += dl2*dXdB; // <xb> |
| 1315 | (*fCovariance)(3,1) = (*fCovariance)(1,3); |
| 1316 | |
| 1317 | (*fCovariance)(2,3) += theta02*step*dAdB; // <ab> |
| 1318 | (*fCovariance)(3,2) = (*fCovariance)(2,3); |
| 1319 | |
| 1320 | // Get weight matrix |
| 1321 | *fWeight = *fCovariance; |
| 1322 | if (fWeight->Determinant() != 0) { |
| 1323 | // fWeight->Invert(); |
| 1324 | |
| 1325 | Int_t ifailWeight; |
| 1326 | mnvertLocalK(&((*fWeight)(0,0)), kSize,kSize,kSize,ifailWeight); |
| 1327 | } else { |
| 1328 | cout << " ***** Warning in MSLine: Determinant fWeight=0:" << endl; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | //__________________________________________________________________________ |
| 1333 | void AliMUONTrackK::Recover(void) |
| 1334 | { |
| 1335 | // Adds new failed track(s) which can be tried to be recovered |
| 1336 | Int_t nRecTracks, ichamb; |
| 1337 | TClonesArray *trackPtr; |
| 1338 | AliMUONTrackK *trackK; |
| 1339 | |
| 1340 | //cout << " ******** Enter Recover " << endl; |
| 1341 | //return; |
| 1342 | trackPtr = fgEventReconstructor->GetRecTracksPtr(); |
| 1343 | |
| 1344 | // The last hit will be removed |
| 1345 | nRecTracks = fgEventReconstructor->GetNRecTracks(); |
| 1346 | |
| 1347 | // Check if the track candidate doesn't exist yet |
| 1348 | for (Int_t i=0; i<nRecTracks; i++) { |
| 1349 | trackK = (AliMUONTrackK*) ((*trackPtr)[i]); |
| 1350 | if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue; |
| 1351 | if (trackK == this) continue; |
| 1352 | //if (trackK->GetRecover() != 1) continue; |
| 1353 | if (trackK->fNTrackHits >= fNTrackHits-1) { |
| 19b6ceb4 |
1354 | /* |
| 83dbc640 |
1355 | for (Int_t j=0; j<fNTrackHits-1; j++) { |
| 1356 | if ((*trackK->fTrackHitsPtr)[j] != ((*fTrackHitsPtr)[j])) break; |
| 1357 | return; |
| 1358 | } // for (Int_t j=0; |
| 19b6ceb4 |
1359 | */ |
| 1360 | if ((*trackK->fTrackHitsPtr)[0] == ((*fTrackHitsPtr)[0])) return; |
| 83dbc640 |
1361 | } |
| 1362 | } // for (Int_t i=0; |
| 1363 | |
| 1364 | cout << " ******** Enter Recover " << endl; |
| 1365 | trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment); |
| 1366 | fgEventReconstructor->SetNRecTracks(nRecTracks+1); |
| 1367 | trackK->fRecover = 1; |
| 1368 | trackK->fSkipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[fNTrackHits-1]); |
| 1369 | trackK->fNTrackHits = fNTrackHits; |
| 1370 | delete trackK->fTrackHitsPtr; // not efficient ? |
| 1371 | trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr); |
| 1372 | cout << nRecTracks << " " << trackK->fRecover << endl; |
| 1373 | |
| 1374 | // The hit before missing chamber will be removed |
| 1375 | Int_t ichamBeg = ((AliMUONHitForRec*)((*fTrackHitsPtr)[0]))->GetChamberNumber(); |
| 1376 | Int_t indxSkip = -1; |
| 1377 | if (ichamBeg == 9) { |
| 1378 | // segment in the last station |
| 1379 | // look for the missing chamber |
| 1380 | for (Int_t i=1; i<fNTrackHits; i++) { |
| 1381 | ichamb = ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetChamberNumber(); |
| 1382 | if (TMath::Abs(ichamBeg-ichamb)>1 && i>2) { |
| 1383 | indxSkip = i; |
| 1384 | break; |
| 1385 | } |
| 1386 | ichamBeg = ichamb; |
| 1387 | } // for (Int_t i=1; |
| 1388 | } else { |
| 1389 | // in the last but one station |
| 1390 | for (Int_t i=1; i<fNTrackHits; i++) { |
| 1391 | ichamb = ((AliMUONHitForRec*)((*fTrackHitsPtr)[i]))->GetChamberNumber(); |
| 1392 | if (TMath::Abs(ichamBeg-ichamb)>1 && ichamb<4) { |
| 1393 | indxSkip = i; |
| 1394 | break; |
| 1395 | } |
| 1396 | ichamBeg = ichamb; |
| 1397 | } // for (Int_t i=1; |
| 1398 | } |
| 1399 | if (indxSkip < 0) return; |
| 1400 | |
| 1401 | // Check if the track candidate doesn't exist yet |
| 1402 | for (Int_t i=0; i<nRecTracks; i++) { |
| 1403 | trackK = (AliMUONTrackK*) ((*trackPtr)[i]); |
| 1404 | if (trackK->fNTrackHits == 2 && trackK->GetRecover() == 0) continue; |
| 1405 | if (trackK == this) continue; |
| 1406 | //if (trackK->GetRecover() != 1) continue; |
| 1407 | if (trackK->fNTrackHits >= indxSkip-1) { |
| 19b6ceb4 |
1408 | /* |
| 83dbc640 |
1409 | for (Int_t j=0; j<indxSkip-1; j++) { |
| 1410 | if ((*trackK->fTrackHitsPtr)[j] != ((*fTrackHitsPtr)[j])) break; |
| 1411 | return; |
| 1412 | } // for (Int_t j=0; |
| 19b6ceb4 |
1413 | */ |
| 1414 | if ((*trackK->fTrackHitsPtr)[0] == ((*fTrackHitsPtr)[0])) return; |
| 83dbc640 |
1415 | } |
| 1416 | } // for (Int_t i=0; |
| 1417 | |
| 1418 | nRecTracks = fgEventReconstructor->GetNRecTracks(); |
| 1419 | trackK = new ((*trackPtr)[nRecTracks]) AliMUONTrackK(fStartSegment); |
| 1420 | fgEventReconstructor->SetNRecTracks(nRecTracks+1); |
| 1421 | trackK->fRecover = 2; |
| 1422 | trackK->fSkipHit = (AliMUONHitForRec*) ((*fTrackHitsPtr)[indxSkip-1]); |
| 1423 | trackK->fNTrackHits = fNTrackHits; |
| 1424 | delete trackK->fTrackHitsPtr; // not efficient ? |
| 1425 | trackK->fTrackHitsPtr = new TObjArray(*fTrackHitsPtr); |
| 1426 | cout << nRecTracks << " " << trackK->fRecover << endl; |
| 1427 | } |
| 1428 | |
| 1429 | //______________________________________________________________________________ |
| 1430 | void mnvertLocalK(Double_t *a, Int_t l, Int_t, Int_t n, Int_t &ifail) |
| 1431 | { |
| 1432 | //*-*-*-*-*-*-*-*-*-*-*-*Inverts a symmetric matrix*-*-*-*-*-*-*-*-*-*-*-*-* |
| 1433 | //*-* ========================== |
| 1434 | //*-* inverts a symmetric matrix. matrix is first scaled to |
| 1435 | //*-* have all ones on the diagonal (equivalent to change of units) |
| 1436 | //*-* but no pivoting is done since matrix is positive-definite. |
| 1437 | //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* |
| 1438 | |
| 1439 | // taken from TMinuit package of Root (l>=n) |
| 1440 | // fVERTs, fVERTq and fVERTpp changed to localVERTs, localVERTq and localVERTpp |
| 1441 | // Double_t localVERTs[n], localVERTq[n], localVERTpp[n]; |
| 1442 | Double_t * localVERTs = new Double_t[n]; |
| 1443 | Double_t * localVERTq = new Double_t[n]; |
| 1444 | Double_t * localVERTpp = new Double_t[n]; |
| 1445 | // fMaxint changed to localMaxint |
| 1446 | Int_t localMaxint = n; |
| 1447 | |
| 1448 | /* System generated locals */ |
| 1449 | Int_t aOffset; |
| 1450 | |
| 1451 | /* Local variables */ |
| 1452 | Double_t si; |
| 1453 | Int_t i, j, k, kp1, km1; |
| 1454 | |
| 1455 | /* Parameter adjustments */ |
| 1456 | aOffset = l + 1; |
| 1457 | a -= aOffset; |
| 1458 | |
| 1459 | /* Function Body */ |
| 1460 | ifail = 0; |
| 1461 | if (n < 1) goto L100; |
| 1462 | if (n > localMaxint) goto L100; |
| 1463 | //*-*- scale matrix by sqrt of diag elements |
| 1464 | for (i = 1; i <= n; ++i) { |
| 1465 | si = a[i + i*l]; |
| 1466 | if (si <= 0) goto L100; |
| 1467 | localVERTs[i-1] = 1 / TMath::Sqrt(si); |
| 1468 | } |
| 1469 | for (i = 1; i <= n; ++i) { |
| 1470 | for (j = 1; j <= n; ++j) { |
| 1471 | a[i + j*l] = a[i + j*l]*localVERTs[i-1]*localVERTs[j-1]; |
| 1472 | } |
| 1473 | } |
| 1474 | //*-*- . . . start main loop . . . . |
| 1475 | for (i = 1; i <= n; ++i) { |
| 1476 | k = i; |
| 1477 | //*-*- preparation for elimination step1 |
| 1478 | if (a[k + k*l] != 0) localVERTq[k-1] = 1 / a[k + k*l]; |
| 1479 | else goto L100; |
| 1480 | localVERTpp[k-1] = 1; |
| 1481 | a[k + k*l] = 0; |
| 1482 | kp1 = k + 1; |
| 1483 | km1 = k - 1; |
| 1484 | if (km1 < 0) goto L100; |
| 1485 | else if (km1 == 0) goto L50; |
| 1486 | else goto L40; |
| 1487 | L40: |
| 1488 | for (j = 1; j <= km1; ++j) { |
| 1489 | localVERTpp[j-1] = a[j + k*l]; |
| 1490 | localVERTq[j-1] = a[j + k*l]*localVERTq[k-1]; |
| 1491 | a[j + k*l] = 0; |
| 1492 | } |
| 1493 | L50: |
| 1494 | if (k - n < 0) goto L51; |
| 1495 | else if (k - n == 0) goto L60; |
| 1496 | else goto L100; |
| 1497 | L51: |
| 1498 | for (j = kp1; j <= n; ++j) { |
| 1499 | localVERTpp[j-1] = a[k + j*l]; |
| 1500 | localVERTq[j-1] = -a[k + j*l]*localVERTq[k-1]; |
| 1501 | a[k + j*l] = 0; |
| 1502 | } |
| 1503 | //*-*- elimination proper |
| 1504 | L60: |
| 1505 | for (j = 1; j <= n; ++j) { |
| 1506 | for (k = j; k <= n; ++k) { a[j + k*l] += localVERTpp[j-1]*localVERTq[k-1]; } |
| 1507 | } |
| 1508 | } |
| 1509 | //*-*- elements of left diagonal and unscaling |
| 1510 | for (j = 1; j <= n; ++j) { |
| 1511 | for (k = 1; k <= j; ++k) { |
| 1512 | a[k + j*l] = a[k + j*l]*localVERTs[k-1]*localVERTs[j-1]; |
| 1513 | a[j + k*l] = a[k + j*l]; |
| 1514 | } |
| 1515 | } |
| 1516 | delete localVERTs; |
| 1517 | delete localVERTq; |
| 1518 | delete localVERTpp; |
| 1519 | return; |
| 1520 | //*-*- failure return |
| 1521 | L100: |
| 1522 | delete localVERTs; |
| 1523 | delete localVERTq; |
| 1524 | delete localVERTpp; |
| 1525 | ifail = 1; |
| 1526 | } /* mnvertLocal */ |
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