| | 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 | /* $Id$ */ |
| | 17 | |
| | 18 | //////////////////////////////////// |
| | 19 | // |
| | 20 | // MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
| | 21 | // |
| | 22 | // This class contains as data: |
| | 23 | // * the parameters for the track reconstruction |
| | 24 | // * a pointer to the array of hits to be reconstructed (the event) |
| | 25 | // * a pointer to the array of segments made with these hits inside each station |
| | 26 | // * a pointer to the array of reconstructed tracks |
| | 27 | // |
| | 28 | // It contains as methods, among others: |
| | 29 | // * MakeEventToBeReconstructed to build the array of hits to be reconstructed |
| | 30 | // * MakeSegments to build the segments |
| | 31 | // * MakeTracks to build the tracks |
| | 32 | // |
| | 33 | //////////////////////////////////// |
| | 34 | |
| | 35 | #include <stdlib.h> |
| | 36 | #include <Riostream.h> |
| | 37 | #include <TDirectory.h> |
| | 38 | #include <TFile.h> |
| | 39 | #include <TMatrixD.h> |
| | 40 | |
| | 41 | #include "AliMUONTrackReconstructor.h" |
| | 42 | #include "AliMUON.h" |
| | 43 | #include "AliMUONConstants.h" |
| | 44 | #include "AliMUONHitForRec.h" |
| | 45 | #include "AliMUONTriggerTrack.h" |
| | 46 | #include "AliMUONTriggerCircuitNew.h" |
| | 47 | #include "AliMUONRawCluster.h" |
| | 48 | #include "AliMUONLocalTrigger.h" |
| | 49 | #include "AliMUONGlobalTrigger.h" |
| | 50 | #include "AliMUONSegment.h" |
| | 51 | #include "AliMUONTrack.h" |
| | 52 | #include "AliMUONTrackHit.h" |
| | 53 | #include "AliMagF.h" |
| | 54 | #include "AliRun.h" // for gAlice |
| | 55 | #include "AliRunLoader.h" |
| | 56 | #include "AliLoader.h" |
| | 57 | #include "AliMUONTrackK.h" |
| | 58 | #include "AliLog.h" |
| | 59 | #include "AliTracker.h" |
| | 60 | |
| | 61 | //************* Defaults parameters for reconstruction |
| | 62 | const Double_t AliMUONTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0; |
| | 63 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxBendingMomentum = 3000.0; |
| | 64 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxChi2 = 100.0; |
| | 65 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxSigma2Distance = 16.0; |
| | 66 | const Double_t AliMUONTrackReconstructor::fgkDefaultBendingResolution = 0.01; |
| | 67 | const Double_t AliMUONTrackReconstructor::fgkDefaultNonBendingResolution = 0.144; |
| | 68 | const Double_t AliMUONTrackReconstructor::fgkDefaultChamberThicknessInX0 = 0.03; |
| | 69 | // Simple magnetic field: |
| | 70 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG |
| | 71 | // Length and Position from reco_muon.F, with opposite sign: |
| | 72 | // Length = ZMAGEND-ZCOIL |
| | 73 | // Position = (ZMAGEND+ZCOIL)/2 |
| | 74 | // to be ajusted differently from real magnetic field ???? |
| | 75 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBValue = 7.0; |
| | 76 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBLength = 428.0; |
| | 77 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBPosition = 1019.0; |
| | 78 | const Double_t AliMUONTrackReconstructor::fgkDefaultEfficiency = 0.95; |
| | 79 | |
| | 80 | ClassImp(AliMUONTrackReconstructor) // Class implementation in ROOT context |
| | 81 | |
| | 82 | //__________________________________________________________________________ |
| | 83 | AliMUONTrackReconstructor::AliMUONTrackReconstructor(AliLoader* loader, AliMUONData* data) |
| | 84 | : TObject(), |
| | 85 | fTrackMethod(1), //AZ - tracking method (1-default, 2-Kalman) |
| | 86 | fMinBendingMomentum(fgkDefaultMinBendingMomentum), |
| | 87 | fMaxBendingMomentum(fgkDefaultMaxBendingMomentum), |
| | 88 | fMaxChi2(fgkDefaultMaxChi2), |
| | 89 | fMaxSigma2Distance(fgkDefaultMaxSigma2Distance), |
| | 90 | fBendingResolution(fgkDefaultBendingResolution), |
| | 91 | fNonBendingResolution(fgkDefaultNonBendingResolution), |
| | 92 | fChamberThicknessInX0(fgkDefaultChamberThicknessInX0), |
| | 93 | fSimpleBValue(fgkDefaultSimpleBValue), |
| | 94 | fSimpleBLength(fgkDefaultSimpleBLength), |
| | 95 | fSimpleBPosition(fgkDefaultSimpleBPosition), |
| | 96 | fEfficiency(fgkDefaultEfficiency), |
| | 97 | fHitsForRecPtr(0x0), |
| | 98 | fNHitsForRec(0), |
| | 99 | fRecTracksPtr(0x0), |
| | 100 | fNRecTracks(0), |
| | 101 | fRecTrackHitsPtr(0x0), |
| | 102 | fNRecTrackHits(0), |
| | 103 | fMUONData(data), |
| | 104 | fLoader(loader), |
| | 105 | fMuons(0), |
| | 106 | fTriggerTrack(new AliMUONTriggerTrack()) |
| | 107 | { |
| | 108 | // Constructor for class AliMUONTrackReconstructor |
| | 109 | SetReconstructionParametersToDefaults(); |
| | 110 | |
| | 111 | // Memory allocation for the TClonesArray of hits for reconstruction |
| | 112 | // Is 10000 the right size ???? |
| | 113 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); |
| | 114 | |
| | 115 | // Memory allocation for the TClonesArray's of segments in stations |
| | 116 | // Is 2000 the right size ???? |
| | 117 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
| | 118 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); |
| | 119 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? |
| | 120 | } |
| | 121 | // Memory allocation for the TClonesArray of reconstructed tracks |
| | 122 | // Is 10 the right size ???? |
| | 123 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); |
| | 124 | |
| | 125 | // Memory allocation for the TClonesArray of hits on reconstructed tracks |
| | 126 | // Is 100 the right size ???? |
| | 127 | fRecTrackHitsPtr = new TClonesArray("AliMUONTrackHit", 100); |
| | 128 | |
| | 129 | const AliMagF* kField = AliTracker::GetFieldMap(); |
| | 130 | if (!kField) AliFatal("No field available"); |
| | 131 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,-950). |
| | 132 | Float_t b[3], x[3]; |
| | 133 | x[0] = 50.; x[1] = 50.; x[2] = -950.; |
| | 134 | kField->Field(x,b); |
| | 135 | |
| | 136 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); |
| | 137 | fSimpleBPosition = TMath::Sign(fSimpleBPosition,(Double_t) x[2]); |
| | 138 | // See how to get fSimple(BValue, BLength, BPosition) |
| | 139 | // automatically calculated from the actual magnetic field ???? |
| | 140 | |
| | 141 | return; |
| | 142 | } |
| | 143 | |
| | 144 | //__________________________________________________________________________ |
| | 145 | AliMUONTrackReconstructor::~AliMUONTrackReconstructor(void) |
| | 146 | { |
| | 147 | // Destructor for class AliMUONTrackReconstructor |
| | 148 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? |
| | 149 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) |
| | 150 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? |
| | 151 | |
| | 152 | delete fTriggerTrack; |
| | 153 | } |
| | 154 | //__________________________________________________________________________ |
| | 155 | void AliMUONTrackReconstructor::SetReconstructionParametersToDefaults(void) |
| | 156 | { |
| | 157 | // Set reconstruction parameters to default values |
| | 158 | // Would be much more convenient with a structure (or class) ???? |
| | 159 | |
| | 160 | // ******** Parameters for making HitsForRec |
| | 161 | // minimum radius, |
| | 162 | // like in TRACKF_STAT: |
| | 163 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; |
| | 164 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 |
| | 165 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
| | 166 | if (ch < 4) fRMin[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * |
| | 167 | 2.0 * TMath::Pi() / 180.0; |
| | 168 | else fRMin[ch] = 30.0; |
| | 169 | // maximum radius at 10 degrees and Z of chamber |
| | 170 | fRMax[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * |
| | 171 | 10.0 * TMath::Pi() / 180.0; |
| | 172 | } |
| | 173 | |
| | 174 | // ******** Parameters for making segments |
| | 175 | // should be parametrized ???? |
| | 176 | // according to interval between chambers in a station ???? |
| | 177 | // Maximum distance in non bending plane |
| | 178 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT |
| | 179 | // SIGCUT*DYMAX(IZ) |
| | 180 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) |
| | 181 | fSegmentMaxDistNonBending[st] = 5. * 0.22; |
| | 182 | // Maximum distance in bending plane: |
| | 183 | // values from TRACKF_STAT, corresponding to (J psi 20cm), |
| | 184 | // scaled to the real distance between chambers in a station |
| | 185 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * |
| | 186 | (AliMUONConstants::DefaultChamberZ(1) - AliMUONConstants::DefaultChamberZ(0)) / 20.0); |
| | 187 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * |
| | 188 | (AliMUONConstants::DefaultChamberZ(3) - AliMUONConstants::DefaultChamberZ(2)) / 20.0); |
| | 189 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * |
| | 190 | (AliMUONConstants::DefaultChamberZ(5) - AliMUONConstants::DefaultChamberZ(4)) / 20.0); |
| | 191 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * |
| | 192 | (AliMUONConstants::DefaultChamberZ(7) - AliMUONConstants::DefaultChamberZ(6)) / 20.0); |
| | 193 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * |
| | 194 | (AliMUONConstants::DefaultChamberZ(9) - AliMUONConstants::DefaultChamberZ(8)) / 20.0); |
| | 195 | |
| | 196 | return; |
| | 197 | } |
| | 198 | |
| | 199 | //__________________________________________________________________________ |
| | 200 | Double_t AliMUONTrackReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const |
| | 201 | { |
| | 202 | // Returns impact parameter at vertex in bending plane (cm), |
| | 203 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), |
| | 204 | // using simple values for dipole magnetic field. |
| | 205 | // The sign of "BendingMomentum" is the sign of the charge. |
| | 206 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
| | 207 | BendingMomentum); |
| | 208 | } |
| | 209 | |
| | 210 | //__________________________________________________________________________ |
| | 211 | Double_t AliMUONTrackReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const |
| | 212 | { |
| | 213 | // Returns signed bending momentum in bending plane (GeV/c), |
| | 214 | // the sign being the sign of the charge for particles moving forward in Z, |
| | 215 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), |
| | 216 | // using simple values for dipole magnetic field. |
| | 217 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
| | 218 | ImpactParam); |
| | 219 | } |
| | 220 | |
| | 221 | //__________________________________________________________________________ |
| | 222 | void AliMUONTrackReconstructor::EventReconstruct(void) |
| | 223 | { |
| | 224 | // To reconstruct one event |
| | 225 | AliDebug(1,"Enter EventReconstruct"); |
| | 226 | ResetTracks(); //AZ |
| | 227 | ResetTrackHits(); //AZ |
| | 228 | ResetSegments(); //AZ |
| | 229 | ResetHitsForRec(); //AZ |
| | 230 | MakeEventToBeReconstructed(); |
| | 231 | MakeSegments(); |
| | 232 | MakeTracks(); |
| | 233 | if (fMUONData->IsTriggerTrackBranchesInTree()) |
| | 234 | ValidateTracksWithTrigger(); |
| | 235 | |
| | 236 | // Add tracks to MUON data container |
| | 237 | for(Int_t i=0; i<GetNRecTracks(); i++) { |
| | 238 | AliMUONTrack * track = (AliMUONTrack*) GetRecTracksPtr()->At(i); |
| | 239 | fMUONData->AddRecTrack(*track); |
| | 240 | } |
| | 241 | |
| | 242 | return; |
| | 243 | } |
| | 244 | |
| | 245 | //__________________________________________________________________________ |
| | 246 | void AliMUONTrackReconstructor::EventReconstructTrigger(void) |
| | 247 | { |
| | 248 | // To reconstruct one event |
| | 249 | AliDebug(1,"Enter EventReconstructTrigger"); |
| | 250 | MakeTriggerTracks(); |
| | 251 | return; |
| | 252 | } |
| | 253 | |
| | 254 | //__________________________________________________________________________ |
| | 255 | void AliMUONTrackReconstructor::ResetHitsForRec(void) |
| | 256 | { |
| | 257 | // To reset the array and the number of HitsForRec, |
| | 258 | // and also the number of HitsForRec |
| | 259 | // and the index of the first HitForRec per chamber |
| | 260 | if (fHitsForRecPtr) fHitsForRecPtr->Delete(); |
| | 261 | fNHitsForRec = 0; |
| | 262 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) |
| | 263 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; |
| | 264 | return; |
| | 265 | } |
| | 266 | |
| | 267 | //__________________________________________________________________________ |
| | 268 | void AliMUONTrackReconstructor::ResetSegments(void) |
| | 269 | { |
| | 270 | // To reset the TClonesArray of segments and the number of Segments |
| | 271 | // for all stations |
| | 272 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
| | 273 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); |
| | 274 | fNSegments[st] = 0; |
| | 275 | } |
| | 276 | return; |
| | 277 | } |
| | 278 | |
| | 279 | //__________________________________________________________________________ |
| | 280 | void AliMUONTrackReconstructor::ResetTracks(void) |
| | 281 | { |
| | 282 | // To reset the TClonesArray of reconstructed tracks |
| | 283 | if (fRecTracksPtr) fRecTracksPtr->Delete(); |
| | 284 | // Delete in order that the Track destructors are called, |
| | 285 | // hence the space for the TClonesArray of pointers to TrackHit's is freed |
| | 286 | fNRecTracks = 0; |
| | 287 | return; |
| | 288 | } |
| | 289 | |
| | 290 | |
| | 291 | //__________________________________________________________________________ |
| | 292 | void AliMUONTrackReconstructor::ResetTrackHits(void) |
| | 293 | { |
| | 294 | // To reset the TClonesArray of hits on reconstructed tracks |
| | 295 | if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear(); |
| | 296 | fNRecTrackHits = 0; |
| | 297 | return; |
| | 298 | } |
| | 299 | |
| | 300 | //__________________________________________________________________________ |
| | 301 | void AliMUONTrackReconstructor::MakeEventToBeReconstructed(void) |
| | 302 | { |
| | 303 | // To make the list of hits to be reconstructed, |
| | 304 | // either from the track ref. hits or from the raw clusters |
| | 305 | // according to the parameter set for the reconstructor |
| | 306 | |
| | 307 | AliRunLoader *runLoader = fLoader->GetRunLoader(); |
| | 308 | |
| | 309 | AliDebug(1,"Enter MakeEventToBeReconstructed"); |
| | 310 | //AZ ResetHitsForRec(); |
| | 311 | |
| | 312 | // Reconstruction from raw clusters |
| | 313 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
| | 314 | // Security on MUON ???? |
| | 315 | // TreeR assumed to be be "prepared" in calling function |
| | 316 | // by "MUON->GetTreeR(nev)" ???? |
| | 317 | TTree *treeR = fLoader->TreeR(); |
| | 318 | |
| | 319 | //AZ? fMUONData->SetTreeAddress("RC"); |
| | 320 | AddHitsForRecFromRawClusters(treeR); |
| | 321 | // No sorting: it is done automatically in the previous function |
| | 322 | |
| | 323 | |
| | 324 | AliDebug(1,"End of MakeEventToBeReconstructed"); |
| | 325 | if (AliLog::GetGlobalDebugLevel() > 0) { |
| | 326 | AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec)); |
| | 327 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
| | 328 | AliDebug(1, Form("Chamber(0...): %d",ch)); |
| | 329 | AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch])); |
| | 330 | AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch])); |
| | 331 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; |
| | 332 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; |
| | 333 | hit++) { |
| | 334 | AliDebug(1, Form("HitForRec index(0...): %d",hit)); |
| | 335 | ((*fHitsForRecPtr)[hit])->Dump(); |
| | 336 | } |
| | 337 | } |
| | 338 | } |
| | 339 | return; |
| | 340 | } |
| | 341 | |
| | 342 | //__________________________________________________________________________ |
| | 343 | void AliMUONTrackReconstructor::SortHitsForRecWithIncreasingChamber() |
| | 344 | { |
| | 345 | // Sort HitsForRec's in increasing order with respect to chamber number. |
| | 346 | // Uses the function "Compare". |
| | 347 | // Update the information for HitsForRec per chamber too. |
| | 348 | Int_t ch, nhits, prevch; |
| | 349 | fHitsForRecPtr->Sort(); |
| | 350 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
| | 351 | fNHitsForRecPerChamber[ch] = 0; |
| | 352 | fIndexOfFirstHitForRecPerChamber[ch] = 0; |
| | 353 | } |
| | 354 | prevch = 0; // previous chamber |
| | 355 | nhits = 0; // number of hits in current chamber |
| | 356 | // Loop over HitsForRec |
| | 357 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { |
| | 358 | // chamber number (0...) |
| | 359 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); |
| | 360 | // increment number of hits in current chamber |
| | 361 | (fNHitsForRecPerChamber[ch])++; |
| | 362 | // update index of first HitForRec in current chamber |
| | 363 | // if chamber number different from previous one |
| | 364 | if (ch != prevch) { |
| | 365 | fIndexOfFirstHitForRecPerChamber[ch] = hit; |
| | 366 | prevch = ch; |
| | 367 | } |
| | 368 | } |
| | 369 | return; |
| | 370 | } |
| | 371 | |
| | 372 | //__________________________________________________________________________ |
| | 373 | void AliMUONTrackReconstructor::AddHitsForRecFromRawClusters(TTree* TR) |
| | 374 | { |
| | 375 | // To add to the list of hits for reconstruction all the raw clusters |
| | 376 | // No condition added, like in Fortran TRACKF_STAT, |
| | 377 | // on the radius between RMin and RMax. |
| | 378 | AliMUONHitForRec *hitForRec; |
| | 379 | AliMUONRawCluster *clus; |
| | 380 | Int_t iclus, nclus, nTRentries; |
| | 381 | TClonesArray *rawclusters; |
| | 382 | AliDebug(1,"Enter AddHitsForRecFromRawClusters"); |
| | 383 | |
| | 384 | if (fTrackMethod != 3) { //AZ |
| | 385 | fMUONData->SetTreeAddress("RC"); //AZ |
| | 386 | nTRentries = Int_t(TR->GetEntries()); |
| | 387 | if (nTRentries != 1) { |
| | 388 | AliError(Form("nTRentries = %d not equal to 1 ",nTRentries)); |
| | 389 | exit(0); |
| | 390 | } |
| | 391 | fLoader->TreeR()->GetEvent(0); // only one entry |
| | 392 | } |
| | 393 | |
| | 394 | // Loop over tracking chambers |
| | 395 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
| | 396 | // number of HitsForRec to 0 for the chamber |
| | 397 | fNHitsForRecPerChamber[ch] = 0; |
| | 398 | // index of first HitForRec for the chamber |
| | 399 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; |
| | 400 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; |
| | 401 | rawclusters =fMUONData->RawClusters(ch); |
| | 402 | nclus = (Int_t) (rawclusters->GetEntries()); |
| | 403 | // Loop over (cathode correlated) raw clusters |
| | 404 | for (iclus = 0; iclus < nclus; iclus++) { |
| | 405 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); |
| | 406 | // new AliMUONHitForRec from raw cluster |
| | 407 | // and increment number of AliMUONHitForRec's (total and in chamber) |
| | 408 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); |
| | 409 | fNHitsForRec++; |
| | 410 | (fNHitsForRecPerChamber[ch])++; |
| | 411 | // more information into HitForRec |
| | 412 | // resolution: info should be already in raw cluster and taken from it ???? |
| | 413 | //hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); |
| | 414 | //hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); |
| | 415 | hitForRec->SetBendingReso2(clus->GetErrY() * clus->GetErrY()); |
| | 416 | hitForRec->SetNonBendingReso2(clus->GetErrX() * clus->GetErrX()); |
| | 417 | // original raw cluster |
| | 418 | hitForRec->SetChamberNumber(ch); |
| | 419 | hitForRec->SetHitNumber(iclus); |
| | 420 | // Z coordinate of the raw cluster (cm) |
| | 421 | hitForRec->SetZ(clus->GetZ(0)); |
| | 422 | if (AliLog::GetGlobalDebugLevel() > 1) { |
| | 423 | cout << "chamber (0...): " << ch << |
| | 424 | " raw cluster (0...): " << iclus << endl; |
| | 425 | clus->Dump(); |
| | 426 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; |
| | 427 | hitForRec->Dump();} |
| | 428 | } // end of cluster loop |
| | 429 | } // end of chamber loop |
| | 430 | SortHitsForRecWithIncreasingChamber(); |
| | 431 | return; |
| | 432 | } |
| | 433 | |
| | 434 | //__________________________________________________________________________ |
| | 435 | void AliMUONTrackReconstructor::MakeSegments(void) |
| | 436 | { |
| | 437 | // To make the list of segments in all stations, |
| | 438 | // from the list of hits to be reconstructed |
| | 439 | AliDebug(1,"Enter MakeSegments"); |
| | 440 | //AZ ResetSegments(); |
| | 441 | // Loop over stations |
| | 442 | Int_t nb = (fTrackMethod != 1) ? 3 : 0; //AZ |
| | 443 | for (Int_t st = nb; st < AliMUONConstants::NTrackingCh()/2; st++) |
| | 444 | MakeSegmentsPerStation(st); |
| | 445 | if (AliLog::GetGlobalDebugLevel() > 1) { |
| | 446 | cout << "end of MakeSegments" << endl; |
| | 447 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
| | 448 | cout << "station(0...): " << st |
| | 449 | << " Segments: " << fNSegments[st] |
| | 450 | << endl; |
| | 451 | for (Int_t seg = 0; |
| | 452 | seg < fNSegments[st]; |
| | 453 | seg++) { |
| | 454 | cout << "Segment index(0...): " << seg << endl; |
| | 455 | ((*fSegmentsPtr[st])[seg])->Dump(); |
| | 456 | } |
| | 457 | } |
| | 458 | } |
| | 459 | return; |
| | 460 | } |
| | 461 | |
| | 462 | //__________________________________________________________________________ |
| | 463 | void AliMUONTrackReconstructor::MakeSegmentsPerStation(Int_t Station) |
| | 464 | { |
| | 465 | // To make the list of segments in station number "Station" (0...) |
| | 466 | // from the list of hits to be reconstructed. |
| | 467 | // Updates "fNSegments"[Station]. |
| | 468 | // Segments in stations 4 and 5 are sorted |
| | 469 | // according to increasing absolute value of "impact parameter" |
| | 470 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; |
| | 471 | AliMUONSegment *segment; |
| | 472 | Bool_t last2st; |
| | 473 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, |
| | 474 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. |
| | 475 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",Station)); |
| | 476 | // first and second chambers (0...) in the station |
| | 477 | Int_t ch1 = 2 * Station; |
| | 478 | Int_t ch2 = ch1 + 1; |
| | 479 | // variable true for stations downstream of the dipole: |
| | 480 | // Station(0..4) equal to 3 or 4 |
| | 481 | if ((Station == 3) || (Station == 4)) { |
| | 482 | last2st = kTRUE; |
| | 483 | // maximum impact parameter (cm) according to fMinBendingMomentum... |
| | 484 | maxImpactParam = |
| | 485 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); |
| | 486 | // minimum impact parameter (cm) according to fMaxBendingMomentum... |
| | 487 | minImpactParam = |
| | 488 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); |
| | 489 | } |
| | 490 | else last2st = kFALSE; |
| | 491 | // extrapolation factor from Z of first chamber to Z of second chamber |
| | 492 | // dZ to be changed to take into account fine structure of chambers ???? |
| | 493 | Double_t extrapFact; |
| | 494 | // index for current segment |
| | 495 | Int_t segmentIndex = 0; |
| | 496 | // Loop over HitsForRec in the first chamber of the station |
| | 497 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; |
| | 498 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; |
| | 499 | hit1++) { |
| | 500 | // pointer to the HitForRec |
| | 501 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); |
| | 502 | // extrapolation, |
| | 503 | // on the straight line joining the HitForRec to the vertex (0,0,0), |
| | 504 | // to the Z of the second chamber of the station |
| | 505 | // Loop over HitsForRec in the second chamber of the station |
| | 506 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; |
| | 507 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; |
| | 508 | hit2++) { |
| | 509 | // pointer to the HitForRec |
| | 510 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); |
| | 511 | // absolute values of distances, in bending and non bending planes, |
| | 512 | // between the HitForRec in the second chamber |
| | 513 | // and the previous extrapolation |
| | 514 | extrapFact = hit2Ptr->GetZ()/ hit1Ptr->GetZ(); |
| | 515 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); |
| | 516 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); |
| | 517 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); |
| | 518 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); |
| | 519 | if (last2st) { |
| | 520 | // bending slope |
| | 521 | if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0.0 ) { |
| | 522 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / |
| | 523 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); |
| | 524 | // absolute value of impact parameter |
| | 525 | impactParam = |
| | 526 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); |
| | 527 | } |
| | 528 | else { |
| | 529 | AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): impactParam set to maxImpactParam"); |
| | 530 | impactParam = maxImpactParam; |
| | 531 | } |
| | 532 | } |
| | 533 | // check for distances not too large, |
| | 534 | // and impact parameter not too big if stations downstream of the dipole. |
| | 535 | // Conditions "distBend" and "impactParam" correlated for these stations ???? |
| | 536 | if ((distBend < fSegmentMaxDistBending[Station]) && |
| | 537 | (distNonBend < fSegmentMaxDistNonBending[Station]) && |
| | 538 | (!last2st || (impactParam < maxImpactParam)) && |
| | 539 | (!last2st || (impactParam > minImpactParam))) { |
| | 540 | // make new segment |
| | 541 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) |
| | 542 | AliMUONSegment(hit1Ptr, hit2Ptr); |
| | 543 | // update "link" to this segment from the hit in the first chamber |
| | 544 | if (hit1Ptr->GetNSegments() == 0) |
| | 545 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); |
| | 546 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); |
| | 547 | if (AliLog::GetGlobalDebugLevel() > 1) { |
| | 548 | cout << "segmentIndex(0...): " << segmentIndex |
| | 549 | << " distBend: " << distBend |
| | 550 | << " distNonBend: " << distNonBend |
| | 551 | << endl; |
| | 552 | segment->Dump(); |
| | 553 | cout << "HitForRec in first chamber" << endl; |
| | 554 | hit1Ptr->Dump(); |
| | 555 | cout << "HitForRec in second chamber" << endl; |
| | 556 | hit2Ptr->Dump(); |
| | 557 | }; |
| | 558 | // increment index for current segment |
| | 559 | segmentIndex++; |
| | 560 | } |
| | 561 | } //for (Int_t hit2 |
| | 562 | } // for (Int_t hit1... |
| | 563 | fNSegments[Station] = segmentIndex; |
| | 564 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, |
| | 565 | // i.e. Station(0..4) 3 or 4, using the function "Compare". |
| | 566 | // After this sorting, it is impossible to use |
| | 567 | // the "fNSegments" and "fIndexOfFirstSegment" |
| | 568 | // of the HitForRec in the first chamber to explore all segments formed with it. |
| | 569 | // Is this sorting really needed ???? |
| | 570 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); |
| | 571 | AliDebug(1,Form("Station: %d NSegments: %d ", Station, fNSegments[Station])); |
| | 572 | return; |
| | 573 | } |
| | 574 | |
| | 575 | //__________________________________________________________________________ |
| | 576 | void AliMUONTrackReconstructor::MakeTracks(void) |
| | 577 | { |
| | 578 | // To make the tracks, |
| | 579 | // from the list of segments and points in all stations |
| | 580 | AliDebug(1,"Enter MakeTracks"); |
| | 581 | // The order may be important for the following Reset's |
| | 582 | //AZ ResetTracks(); |
| | 583 | //AZ ResetTrackHits(); |
| | 584 | if (fTrackMethod != 1) { //AZ - Kalman filter |
| | 585 | MakeTrackCandidatesK(); |
| | 586 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
| | 587 | // Follow tracks in stations(1..) 3, 2 and 1 |
| | 588 | FollowTracksK(); |
| | 589 | // Remove double tracks |
| | 590 | RemoveDoubleTracksK(); |
| | 591 | // Propagate tracks to the vertex thru absorber |
| | 592 | GoToVertex(); |
| | 593 | // Fill AliMUONTrack data members |
| | 594 | FillMUONTrack(); |
| | 595 | } else { |
| | 596 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 |
| | 597 | MakeTrackCandidates(); |
| | 598 | // Follow tracks in stations(1..) 3, 2 and 1 |
| | 599 | FollowTracks(); |
| | 600 | // Remove double tracks |
| | 601 | RemoveDoubleTracks(); |
| | 602 | UpdateTrackParamAtHit(); |
| | 603 | UpdateHitForRecAtHit(); |
| | 604 | } |
| | 605 | return; |
| | 606 | } |
| | 607 | |
| | 608 | //__________________________________________________________________________ |
| | 609 | void AliMUONTrackReconstructor::ValidateTracksWithTrigger(void) |
| | 610 | { |
| | 611 | // Try to match track from tracking system with trigger track |
| | 612 | AliMUONTrack *track; |
| | 613 | TClonesArray *recTriggerTracks; |
| | 614 | |
| | 615 | fMUONData->SetTreeAddress("RL"); |
| | 616 | fMUONData->GetRecTriggerTracks(); |
| | 617 | recTriggerTracks = fMUONData->RecTriggerTracks(); |
| | 618 | |
| | 619 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
| | 620 | while (track) { |
| | 621 | track->MatchTriggerTrack(recTriggerTracks); |
| | 622 | track = (AliMUONTrack*) fRecTracksPtr->After(track); |
| | 623 | } |
| | 624 | |
| | 625 | } |
| | 626 | |
| | 627 | //__________________________________________________________________________ |
| | 628 | Bool_t AliMUONTrackReconstructor::MakeTriggerTracks(void) |
| | 629 | { |
| | 630 | // To make the trigger tracks from Local Trigger |
| | 631 | AliDebug(1, "Enter MakeTriggerTracks"); |
| | 632 | |
| | 633 | Int_t nTRentries; |
| | 634 | Long_t gloTrigPat; |
| | 635 | TClonesArray *localTrigger; |
| | 636 | TClonesArray *globalTrigger; |
| | 637 | AliMUONLocalTrigger *locTrg; |
| | 638 | AliMUONGlobalTrigger *gloTrg; |
| | 639 | |
| | 640 | TTree* treeR = fLoader->TreeR(); |
| | 641 | |
| | 642 | // Loading MUON subsystem |
| | 643 | AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON"); |
| | 644 | |
| | 645 | nTRentries = Int_t(treeR->GetEntries()); |
| | 646 | |
| | 647 | treeR->GetEvent(0); // only one entry |
| | 648 | |
| | 649 | if (!(fMUONData->IsTriggerBranchesInTree())) { |
| | 650 | AliWarning(Form("Trigger information is not avalaible, nTRentries = %d not equal to 1",nTRentries)); |
| | 651 | return kFALSE; |
| | 652 | } |
| | 653 | |
| | 654 | fMUONData->SetTreeAddress("TC"); |
| | 655 | fMUONData->GetTrigger(); |
| | 656 | |
| | 657 | // global trigger for trigger pattern |
| | 658 | gloTrigPat = 0; |
| | 659 | globalTrigger = fMUONData->GlobalTrigger(); |
| | 660 | gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0); |
| | 661 | |
| | 662 | if (gloTrg) |
| | 663 | gloTrigPat = gloTrg->GetGlobalPattern(); |
| | 664 | |
| | 665 | |
| | 666 | // local trigger for tracking |
| | 667 | localTrigger = fMUONData->LocalTrigger(); |
| | 668 | Int_t nlocals = (Int_t) (localTrigger->GetEntries()); |
| | 669 | |
| | 670 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
| | 671 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); |
| | 672 | |
| | 673 | Float_t y11 = 0.; |
| | 674 | Int_t stripX21 = 0; |
| | 675 | Float_t y21 = 0.; |
| | 676 | Float_t x11 = 0.; |
| | 677 | |
| | 678 | for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger |
| | 679 | locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i); |
| | 680 | |
| | 681 | AliDebug(1, "AliMUONTrackReconstructor::MakeTriggerTrack using NEW trigger \n"); |
| | 682 | AliMUONTriggerCircuitNew * circuit = |
| | 683 | &(pMUON->TriggerCircuitNew(locTrg->LoCircuit()-1)); // -1 !!! |
| | 684 | y11 = circuit->GetY11Pos(locTrg->LoStripX()); |
| | 685 | stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1; |
| | 686 | y21 = circuit->GetY21Pos(stripX21); |
| | 687 | x11 = circuit->GetX11Pos(locTrg->LoStripY()); |
| | 688 | |
| | 689 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %d %f %f %f \n",i,locTrg->LoCircuit(), |
| | 690 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); |
| | 691 | |
| | 692 | Float_t thetax = TMath::ATan2( x11 , z11 ); |
| | 693 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); |
| | 694 | |
| | 695 | fTriggerTrack->SetX11(x11); |
| | 696 | fTriggerTrack->SetY11(y11); |
| | 697 | fTriggerTrack->SetThetax(thetax); |
| | 698 | fTriggerTrack->SetThetay(thetay); |
| | 699 | fTriggerTrack->SetGTPattern(gloTrigPat); |
| | 700 | |
| | 701 | fMUONData->AddRecTriggerTrack(*fTriggerTrack); |
| | 702 | } // end of loop on Local Trigger |
| | 703 | return kTRUE; |
| | 704 | } |
| | 705 | |
| | 706 | //__________________________________________________________________________ |
| | 707 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) |
| | 708 | { |
| | 709 | // To make track candidates with two segments in stations(1..) 4 and 5, |
| | 710 | // the first segment being pointed to by "BegSegment". |
| | 711 | // Returns the number of such track candidates. |
| | 712 | Int_t endStation, iEndSegment, nbCan2Seg; |
| | 713 | AliMUONSegment *endSegment; |
| | 714 | AliMUONSegment *extrapSegment = NULL; |
| | 715 | AliMUONTrack *recTrack; |
| | 716 | Double_t mcsFactor; |
| | 717 | AliDebug(1,"Enter MakeTrackCandidatesWithTwoSegments"); |
| | 718 | // Station for the end segment |
| | 719 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; |
| | 720 | // multiple scattering factor corresponding to one chamber |
| | 721 | mcsFactor = 0.0136 / |
| | 722 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); |
| | 723 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; |
| | 724 | // linear extrapolation to end station |
| | 725 | // number of candidates with 2 segments to 0 |
| | 726 | nbCan2Seg = 0; |
| | 727 | // Loop over segments in the end station |
| | 728 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { |
| | 729 | // pointer to segment |
| | 730 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); |
| | 731 | // test compatibility between current segment and "extrapSegment" |
| | 732 | // 4 because 4 quantities in chi2 |
| | 733 | extrapSegment = |
| | 734 | BegSegment->CreateSegmentFromLinearExtrapToStation(endSegment->GetZ(), mcsFactor); |
| | 735 | if ((endSegment-> |
| | 736 | NormalizedChi2WithSegment(extrapSegment, |
| | 737 | fMaxSigma2Distance)) <= 4.0) { |
| | 738 | // both segments compatible: |
| | 739 | // make track candidate from "begSegment" and "endSegment" |
| | 740 | AliDebug(2,Form("TrackCandidate with Segment %d in Station(0..) %d", iEndSegment, endStation)); |
| | 741 | // flag for both segments in one track: |
| | 742 | // to be done in track constructor ???? |
| | 743 | BegSegment->SetInTrack(kTRUE); |
| | 744 | endSegment->SetInTrack(kTRUE); |
| | 745 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) |
| | 746 | AliMUONTrack(BegSegment, endSegment, this); |
| | 747 | fNRecTracks++; |
| | 748 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); |
| | 749 | // increment number of track candidates with 2 segments |
| | 750 | nbCan2Seg++; |
| | 751 | } |
| | 752 | delete extrapSegment; // should not delete HitForRec's it points to !!!! |
| | 753 | } // for (iEndSegment = 0;... |
| | 754 | return nbCan2Seg; |
| | 755 | } |
| | 756 | |
| | 757 | //__________________________________________________________________________ |
| | 758 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) |
| | 759 | { |
| | 760 | // To make track candidates with one segment and one point |
| | 761 | // in stations(1..) 4 and 5, |
| | 762 | // the segment being pointed to by "BegSegment". |
| | 763 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; |
| | 764 | AliMUONHitForRec *extrapHitForRec= NULL; |
| | 765 | AliMUONHitForRec *hit; |
| | 766 | AliMUONTrack *recTrack; |
| | 767 | Double_t mcsFactor; |
| | 768 | AliDebug(1,"Enter MakeTrackCandidatesWithOneSegmentAndOnePoint"); |
| | 769 | // station for the end point |
| | 770 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; |
| | 771 | // multiple scattering factor corresponding to one chamber |
| | 772 | mcsFactor = 0.0136 / |
| | 773 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); |
| | 774 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; |
| | 775 | // first and second chambers(0..) in the end station |
| | 776 | ch1 = 2 * endStation; |
| | 777 | ch2 = ch1 + 1; |
| | 778 | // number of candidates to 0 |
| | 779 | nbCan1Seg1Hit = 0; |
| | 780 | // Loop over chambers of the end station |
| | 781 | for (ch = ch2; ch >= ch1; ch--) { |
| | 782 | // limits for the hit index in the loop |
| | 783 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; |
| | 784 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; |
| | 785 | // Loop over HitForRec's in the chamber |
| | 786 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { |
| | 787 | // pointer to HitForRec |
| | 788 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); |
| | 789 | // test compatibility between current HitForRec and "extrapHitForRec" |
| | 790 | // 2 because 2 quantities in chi2 |
| | 791 | // linear extrapolation to chamber |
| | 792 | extrapHitForRec = |
| | 793 | BegSegment->CreateHitForRecFromLinearExtrapToChamber( hit->GetZ(), mcsFactor); |
| | 794 | if ((hit-> |
| | 795 | NormalizedChi2WithHitForRec(extrapHitForRec, |
| | 796 | fMaxSigma2Distance)) <= 2.0) { |
| | 797 | // both HitForRec's compatible: |
| | 798 | // make track candidate from begSegment and current HitForRec |
| | 799 | AliDebug(2, Form("TrackCandidate with HitForRec %d in Chamber(0..) %d", iHit, ch)); |
| | 800 | // flag for beginning segments in one track: |
| | 801 | // to be done in track constructor ???? |
| | 802 | BegSegment->SetInTrack(kTRUE); |
| | 803 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) |
| | 804 | AliMUONTrack(BegSegment, hit, this); |
| | 805 | // the right place to eliminate "double counting" ???? how ???? |
| | 806 | fNRecTracks++; |
| | 807 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); |
| | 808 | // increment number of track candidates |
| | 809 | nbCan1Seg1Hit++; |
| | 810 | } |
| | 811 | delete extrapHitForRec; |
| | 812 | } // for (iHit = iHitMin;... |
| | 813 | } // for (ch = ch2;... |
| | 814 | return nbCan1Seg1Hit; |
| | 815 | } |
| | 816 | |
| | 817 | //__________________________________________________________________________ |
| | 818 | void AliMUONTrackReconstructor::MakeTrackCandidates(void) |
| | 819 | { |
| | 820 | // To make track candidates |
| | 821 | // with at least 3 aligned points in stations(1..) 4 and 5 |
| | 822 | // (two Segment's or one Segment and one HitForRec) |
| | 823 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; |
| | 824 | AliMUONSegment *begSegment; |
| | 825 | AliDebug(1,"Enter MakeTrackCandidates"); |
| | 826 | // Loop over stations(1..) 5 and 4 for the beginning segment |
| | 827 | for (begStation = 4; begStation > 2; begStation--) { |
| | 828 | // Loop over segments in the beginning station |
| | 829 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { |
| | 830 | // pointer to segment |
| | 831 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); |
| | 832 | AliDebug(2,Form("Look for TrackCandidate's with Segment %d in Station(0..) %d", iBegSegment, begStation)); |
| | 833 | // Look for track candidates with two segments, |
| | 834 | // "begSegment" and all compatible segments in other station. |
| | 835 | // Only for beginning station(1..) 5 |
| | 836 | // because candidates with 2 segments have to looked for only once. |
| | 837 | if (begStation == 4) |
| | 838 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); |
| | 839 | // Look for track candidates with one segment and one point, |
| | 840 | // "begSegment" and all compatible HitForRec's in other station. |
| | 841 | // Only if "begSegment" does not belong already to a track candidate. |
| | 842 | // Is that a too strong condition ???? |
| | 843 | if (!(begSegment->GetInTrack())) |
| | 844 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); |
| | 845 | } // for (iBegSegment = 0;... |
| | 846 | } // for (begStation = 4;... |
| | 847 | return; |
| | 848 | } |
| | 849 | |
| | 850 | //__________________________________________________________________________ |
| | 851 | void AliMUONTrackReconstructor::FollowTracks(void) |
| | 852 | { |
| | 853 | // Follow tracks in stations(1..) 3, 2 and 1 |
| | 854 | // too long: should be made more modular !!!! |
| | 855 | AliMUONHitForRec *bestHit, *extrapHit, *hit; |
| | 856 | AliMUONSegment *bestSegment, *extrapSegment, *segment; |
| | 857 | AliMUONTrack *track, *nextTrack; |
| | 858 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; |
| | 859 | // -1 to avoid compilation warnings |
| | 860 | Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex; |
| | 861 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; |
| | 862 | Double_t bendingMomentum, chi2Norm = 0.; |
| | 863 | |
| | 864 | |
| | 865 | // local maxSigma2Distance, for easy increase in testing |
| | 866 | maxSigma2Distance = fMaxSigma2Distance; |
| | 867 | AliDebug(2,"Enter FollowTracks"); |
| | 868 | // Loop over track candidates |
| | 869 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
| | 870 | trackIndex = -1; |
| | 871 | while (track) { |
| | 872 | // Follow function for each track candidate ???? |
| | 873 | trackIndex++; |
| | 874 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track |
| | 875 | AliDebug(2,Form("FollowTracks: track candidate(0..): %d", trackIndex)); |
| | 876 | // Fit track candidate |
| | 877 | track->SetFitMCS(0); // without multiple Coulomb scattering |
| | 878 | track->SetFitNParam(3); // with 3 parameters (X = Y = 0) |
| | 879 | track->SetFitStart(0); // from parameters at vertex |
| | 880 | track->Fit(); |
| | 881 | if (AliLog::GetGlobalDebugLevel()> 2) { |
| | 882 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
| | 883 | << " after fit in stations(0..) 3 and 4" << endl; |
| | 884 | track->RecursiveDump(); |
| | 885 | } |
| | 886 | // Loop over stations(1..) 3, 2 and 1 |
| | 887 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? |
| | 888 | // otherwise: majority coincidence 2 !!!! |
| | 889 | for (station = 2; station >= 0; station--) { |
| | 890 | // Track parameters at first track hit (smallest Z) |
| | 891 | trackParam1 = ((AliMUONTrackHit*) |
| | 892 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); |
| | 893 | // extrapolation to station |
| | 894 | trackParam1->ExtrapToStation(station, trackParam); |
| | 895 | extrapSegment = new AliMUONSegment(); // empty segment |
| | 896 | // multiple scattering factor corresponding to one chamber |
| | 897 | // and momentum in bending plane (not total) |
| | 898 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); |
| | 899 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; |
| | 900 | // Z difference from previous station |
| | 901 | dZ1 = AliMUONConstants::DefaultChamberZ(2 * station) - |
| | 902 | AliMUONConstants::DefaultChamberZ(2 * station + 2); |
| | 903 | // Z difference between the two previous stations |
| | 904 | dZ2 = AliMUONConstants::DefaultChamberZ(2 * station + 2) - |
| | 905 | AliMUONConstants::DefaultChamberZ(2 * station + 4); |
| | 906 | // Z difference between the two chambers in the previous station |
| | 907 | dZ3 = AliMUONConstants::DefaultChamberZ(2 * station) - |
| | 908 | AliMUONConstants::DefaultChamberZ(2 * station + 1); |
| | 909 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); |
| | 910 | extrapSegment-> |
| | 911 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); |
| | 912 | extrapSegment->UpdateFromStationTrackParam |
| | 913 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, |
| | 914 | trackParam1->GetInverseBendingMomentum()); |
| | 915 | bestChi2 = 5.0; |
| | 916 | bestSegment = NULL; |
| | 917 | if (AliLog::GetGlobalDebugLevel() > 2) { |
| | 918 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
| | 919 | << " Look for segment in station(0..): " << station << endl; |
| | 920 | } |
| | 921 | |
| | 922 | // Loop over segments in station |
| | 923 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { |
| | 924 | // Look for best compatible Segment in station |
| | 925 | // should consider all possibilities ???? |
| | 926 | // multiple scattering ???? |
| | 927 | // separation in 2 functions: Segment and HitForRec ???? |
| | 928 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); |
| | 929 | // correction of corrected segment (fBendingCoor and fNonBendingCoor) |
| | 930 | // according to real Z value of "segment" and slopes of "extrapSegment" |
| | 931 | (&(trackParam[0]))->ExtrapToZ(segment->GetZ()); |
| | 932 | (&(trackParam[1]))->ExtrapToZ(segment->GetZ()); |
| | 933 | extrapSegment->SetBendingCoor((&(trackParam[0]))->GetBendingCoor()); |
| | 934 | extrapSegment->SetNonBendingCoor((&(trackParam[0]))->GetNonBendingCoor()); |
| | 935 | extrapSegment->SetBendingSlope((&(trackParam[0]))->GetBendingSlope()); |
| | 936 | extrapSegment->SetNonBendingSlope((&(trackParam[0]))->GetNonBendingSlope()); |
| | 937 | chi2 = segment-> |
| | 938 | NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance); |
| | 939 | if (chi2 < bestChi2) { |
| | 940 | // update best Chi2 and Segment if better found |
| | 941 | bestSegment = segment; |
| | 942 | bestChi2 = chi2; |
| | 943 | } |
| | 944 | } |
| | 945 | if (bestSegment) { |
| | 946 | // best segment found: add it to track candidate |
| | 947 | (&(trackParam[0]))->ExtrapToZ(bestSegment->GetZ()); |
| | 948 | (&(trackParam[1]))->ExtrapToZ(bestSegment->GetZ()); |
| | 949 | track->AddSegment(bestSegment); |
| | 950 | // set track parameters at these two TrakHit's |
| | 951 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); |
| | 952 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); |
| | 953 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Added segment in station(0..): %d", trackIndex, station)); |
| | 954 | if (AliLog::GetGlobalDebugLevel()>2) track->RecursiveDump(); |
| | 955 | } |
| | 956 | else { |
| | 957 | // No best segment found: |
| | 958 | // Look for best compatible HitForRec in station: |
| | 959 | // should consider all possibilities ???? |
| | 960 | // multiple scattering ???? do about like for extrapSegment !!!! |
| | 961 | extrapHit = new AliMUONHitForRec(); // empty hit |
| | 962 | bestChi2 = 3.0; |
| | 963 | bestHit = NULL; |
| | 964 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Segment not found, look for hit in station(0..): %d ", |
| | 965 | trackIndex, station)); |
| | 966 | |
| | 967 | // Loop over chambers of the station |
| | 968 | for (chInStation = 0; chInStation < 2; chInStation++) { |
| | 969 | ch = 2 * station + chInStation; |
| | 970 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; |
| | 971 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + |
| | 972 | fNHitsForRecPerChamber[ch]; |
| | 973 | iHit++) { |
| | 974 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); |
| | 975 | // coordinates of extrapolated hit |
| | 976 | (&(trackParam[chInStation]))->ExtrapToZ(hit->GetZ()); |
| | 977 | extrapHit-> |
| | 978 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); |
| | 979 | extrapHit-> |
| | 980 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); |
| | 981 | // resolutions from "extrapSegment" |
| | 982 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); |
| | 983 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); |
| | 984 | // Loop over hits in the chamber |
| | 985 | // condition for hit not already in segment ???? |
| | 986 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); |
| | 987 | if (chi2 < bestChi2) { |
| | 988 | // update best Chi2 and HitForRec if better found |
| | 989 | bestHit = hit; |
| | 990 | bestChi2 = chi2; |
| | 991 | chBestHit = chInStation; |
| | 992 | } |
| | 993 | } |
| | 994 | } |
| | 995 | if (bestHit) { |
| | 996 | // best hit found: add it to track candidate |
| | 997 | (&(trackParam[chBestHit]))->ExtrapToZ(bestHit->GetZ()); |
| | 998 | track->AddHitForRec(bestHit); |
| | 999 | // set track parameters at this TrackHit |
| | 1000 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, |
| | 1001 | &(trackParam[chBestHit])); |
| | 1002 | if (AliLog::GetGlobalDebugLevel() > 2) { |
| | 1003 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
| | 1004 | << " Added hit in station(0..): " << station << endl; |
| | 1005 | track->RecursiveDump(); |
| | 1006 | } |
| | 1007 | } |
| | 1008 | else { |
| | 1009 | // Remove current track candidate |
| | 1010 | // and corresponding TrackHit's, ... |
| | 1011 | track->Remove(); |
| | 1012 | delete extrapSegment; |
| | 1013 | delete extrapHit; |
| | 1014 | break; // stop the search for this candidate: |
| | 1015 | // exit from the loop over station |
| | 1016 | } |
| | 1017 | delete extrapHit; |
| | 1018 | } |
| | 1019 | delete extrapSegment; |
| | 1020 | // Sort track hits according to increasing Z |
| | 1021 | track->GetTrackHitsPtr()->Sort(); |
| | 1022 | // Update track parameters at first track hit (smallest Z) |
| | 1023 | trackParam1 = ((AliMUONTrackHit*) |
| | 1024 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); |
| | 1025 | bendingMomentum = 0.; |
| | 1026 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.) |
| | 1027 | bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum())); |
| | 1028 | // Track removed if bendingMomentum not in window [min, max] |
| | 1029 | if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) { |
| | 1030 | track->Remove(); |
| | 1031 | break; // stop the search for this candidate: |
| | 1032 | // exit from the loop over station |
| | 1033 | } |
| | 1034 | // Track fit |
| | 1035 | // with multiple Coulomb scattering if all stations |
| | 1036 | if (station == 0) track->SetFitMCS(1); |
| | 1037 | // without multiple Coulomb scattering if not all stations |
| | 1038 | else track->SetFitMCS(0); |
| | 1039 | track->SetFitNParam(5); // with 5 parameters (momentum and position) |
| | 1040 | track->SetFitStart(1); // from parameters at first hit |
| | 1041 | track->Fit(); |
| | 1042 | Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5); |
| | 1043 | if (numberOfDegFree > 0) { |
| | 1044 | chi2Norm = track->GetFitFMin() / numberOfDegFree; |
| | 1045 | } else { |
| | 1046 | chi2Norm = 1.e10; |
| | 1047 | } |
| | 1048 | // Track removed if normalized chi2 too high |
| | 1049 | if (chi2Norm > fMaxChi2) { |
| | 1050 | track->Remove(); |
| | 1051 | break; // stop the search for this candidate: |
| | 1052 | // exit from the loop over station |
| | 1053 | } |
| | 1054 | if (AliLog::GetGlobalDebugLevel() > 2) { |
| | 1055 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
| | 1056 | << " after fit from station(0..): " << station << " to 4" << endl; |
| | 1057 | track->RecursiveDump(); |
| | 1058 | } |
| | 1059 | // Track extrapolation to the vertex through the absorber (Branson) |
| | 1060 | // after going through the first station |
| | 1061 | if (station == 0) { |
| | 1062 | trackParamVertex = *trackParam1; |
| | 1063 | (&trackParamVertex)->ExtrapToVertex(0.,0.,0.); |
| | 1064 | track->SetTrackParamAtVertex(&trackParamVertex); |
| | 1065 | if (AliLog::GetGlobalDebugLevel() > 0) { |
| | 1066 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
| | 1067 | << " after extrapolation to vertex" << endl; |
| | 1068 | track->RecursiveDump(); |
| | 1069 | } |
| | 1070 | } |
| | 1071 | } // for (station = 2;... |
| | 1072 | // go really to next track |
| | 1073 | track = nextTrack; |
| | 1074 | } // while (track) |
| | 1075 | // Compression of track array (necessary after Remove ????) |
| | 1076 | fRecTracksPtr->Compress(); |
| | 1077 | return; |
| | 1078 | } |
| | 1079 | |
| | 1080 | //__________________________________________________________________________ |
| | 1081 | void AliMUONTrackReconstructor::RemoveDoubleTracks(void) |
| | 1082 | { |
| | 1083 | // To remove double tracks. |
| | 1084 | // Tracks are considered identical |
| | 1085 | // if they have at least half of their hits in common. |
| | 1086 | // Among two identical tracks, one keeps the track with the larger number of hits |
| | 1087 | // or, if these numbers are equal, the track with the minimum Chi2. |
| | 1088 | AliMUONTrack *track1, *track2, *trackToRemove; |
| | 1089 | Bool_t identicalTracks; |
| | 1090 | Int_t hitsInCommon, nHits1, nHits2; |
| | 1091 | identicalTracks = kTRUE; |
| | 1092 | while (identicalTracks) { |
| | 1093 | identicalTracks = kFALSE; |
| | 1094 | // Loop over first track of the pair |
| | 1095 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); |
| | 1096 | while (track1 && (!identicalTracks)) { |
| | 1097 | nHits1 = track1->GetNTrackHits(); |
| | 1098 | // Loop over second track of the pair |
| | 1099 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); |
| | 1100 | while (track2 && (!identicalTracks)) { |
| | 1101 | nHits2 = track2->GetNTrackHits(); |
| | 1102 | // number of hits in common between two tracks |
| | 1103 | hitsInCommon = track1->HitsInCommon(track2); |
| | 1104 | // check for identical tracks |
| | 1105 | if ((4 * hitsInCommon) >= (nHits1 + nHits2)) { |
| | 1106 | identicalTracks = kTRUE; |
| | 1107 | // decide which track to remove |
| | 1108 | if (nHits1 > nHits2) trackToRemove = track2; |
| | 1109 | else if (nHits1 < nHits2) trackToRemove = track1; |
| | 1110 | else if ((track1->GetFitFMin()) < (track2->GetFitFMin())) |
| | 1111 | trackToRemove = track2; |
| | 1112 | else trackToRemove = track1; |
| | 1113 | // remove it |
| | 1114 | trackToRemove->Remove(); |
| | 1115 | } |
| | 1116 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); |
| | 1117 | } // track2 |
| | 1118 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); |
| | 1119 | } // track1 |
| | 1120 | } |
| | 1121 | return; |
| | 1122 | } |
| | 1123 | |
| | 1124 | //__________________________________________________________________________ |
| | 1125 | void AliMUONTrackReconstructor::UpdateTrackParamAtHit() |
| | 1126 | { |
| | 1127 | // Set track parameters after track fitting. Fill fTrackParamAtHit of AliMUONTrack's |
| | 1128 | AliMUONTrack *track; |
| | 1129 | AliMUONTrackHit *trackHit; |
| | 1130 | AliMUONTrackParam *trackParam; |
| | 1131 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
| | 1132 | while (track) { |
| | 1133 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); |
| | 1134 | while (trackHit) { |
| | 1135 | trackParam = trackHit->GetTrackParam(); |
| | 1136 | track->AddTrackParamAtHit(trackParam); |
| | 1137 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); |
| | 1138 | } // trackHit |
| | 1139 | track = (AliMUONTrack*) fRecTracksPtr->After(track); |
| | 1140 | } // track |
| | 1141 | return; |
| | 1142 | } |
| | 1143 | |
| | 1144 | //__________________________________________________________________________ |
| | 1145 | void AliMUONTrackReconstructor::UpdateHitForRecAtHit() |
| | 1146 | { |
| | 1147 | // Set cluster parameterss after track fitting. Fill fHitForRecAtHit of AliMUONTrack's |
| | 1148 | AliMUONTrack *track; |
| | 1149 | AliMUONTrackHit *trackHit; |
| | 1150 | AliMUONHitForRec *hitForRec; |
| | 1151 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
| | 1152 | while (track) { |
| | 1153 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); |
| | 1154 | while (trackHit) { |
| | 1155 | hitForRec = trackHit->GetHitForRecPtr(); |
| | 1156 | track->AddHitForRecAtHit(hitForRec); |
| | 1157 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); |
| | 1158 | } // trackHit |
| | 1159 | track = (AliMUONTrack*) fRecTracksPtr->After(track); |
| | 1160 | } // track |
| | 1161 | return; |
| | 1162 | } |
| | 1163 | |
| | 1164 | //__________________________________________________________________________ |
| | 1165 | void AliMUONTrackReconstructor::FillMUONTrack() |
| | 1166 | { |
| | 1167 | // Set track parameters at hits for Kalman track. Fill fTrackParamAtHit of AliMUONTrack's |
| | 1168 | AliMUONTrackK *track; |
| | 1169 | track = (AliMUONTrackK*) fRecTracksPtr->First(); |
| | 1170 | while (track) { |
| | 1171 | track->FillMUONTrack(); |
| | 1172 | track = (AliMUONTrackK*) fRecTracksPtr->After(track); |
| | 1173 | } |
| | 1174 | return; |
| | 1175 | } |
| | 1176 | |
| | 1177 | //__________________________________________________________________________ |
| | 1178 | void AliMUONTrackReconstructor::EventDump(void) |
| | 1179 | { |
| | 1180 | // Dump reconstructed event (track parameters at vertex and at first hit), |
| | 1181 | // and the particle parameters |
| | 1182 | |
| | 1183 | AliMUONTrack *track; |
| | 1184 | AliMUONTrackParam *trackParam, *trackParam1; |
| | 1185 | Double_t bendingSlope, nonBendingSlope, pYZ; |
| | 1186 | Double_t pX, pY, pZ, x, y, z, c; |
| | 1187 | Int_t np, trackIndex, nTrackHits; |
| | 1188 | |
| | 1189 | AliDebug(1,"****** enter EventDump ******"); |
| | 1190 | AliDebug(1, Form("Number of Reconstructed tracks : %d", fNRecTracks)); |
| | 1191 | |
| | 1192 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole |
| | 1193 | // Loop over reconstructed tracks |
| | 1194 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { |
| | 1195 | if (fTrackMethod != 1) continue; //AZ - skip the rest for now |
| | 1196 | AliDebug(1, Form("track number: %d", trackIndex)); |
| | 1197 | // function for each track for modularity ???? |
| | 1198 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); |
| | 1199 | nTrackHits = track->GetNTrackHits(); |
| | 1200 | AliDebug(1, Form("Number of track hits: %d ", nTrackHits)); |
| | 1201 | // track parameters at Vertex |
| | 1202 | trackParam = track->GetTrackParamAtVertex(); |
| | 1203 | x = trackParam->GetNonBendingCoor(); |
| | 1204 | y = trackParam->GetBendingCoor(); |
| | 1205 | z = trackParam->GetZ(); |
| | 1206 | bendingSlope = trackParam->GetBendingSlope(); |
| | 1207 | nonBendingSlope = trackParam->GetNonBendingSlope(); |
| | 1208 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); |
| | 1209 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); |
| | 1210 | pX = pZ * nonBendingSlope; |
| | 1211 | pY = pZ * bendingSlope; |
| | 1212 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); |
| | 1213 | AliDebug(1, Form("Track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", |
| | 1214 | z, x, y, pX, pY, pZ, c)); |
| | 1215 | |
| | 1216 | // track parameters at first hit |
| | 1217 | trackParam1 = ((AliMUONTrackHit*) |
| | 1218 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); |
| | 1219 | x = trackParam1->GetNonBendingCoor(); |
| | 1220 | y = trackParam1->GetBendingCoor(); |
| | 1221 | z = trackParam1->GetZ(); |
| | 1222 | bendingSlope = trackParam1->GetBendingSlope(); |
| | 1223 | nonBendingSlope = trackParam1->GetNonBendingSlope(); |
| | 1224 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); |
| | 1225 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); |
| | 1226 | pX = pZ * nonBendingSlope; |
| | 1227 | pY = pZ * bendingSlope; |
| | 1228 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); |
| | 1229 | AliDebug(1, Form("track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", |
| | 1230 | z, x, y, pX, pY, pZ, c)); |
| | 1231 | } |
| | 1232 | // informations about generated particles NO !!!!!!!! |
| | 1233 | |
| | 1234 | // for (Int_t iPart = 0; iPart < np; iPart++) { |
| | 1235 | // p = gAlice->Particle(iPart); |
| | 1236 | // printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", |
| | 1237 | // iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); |
| | 1238 | // } |
| | 1239 | return; |
| | 1240 | } |
| | 1241 | |
| | 1242 | |
| | 1243 | //__________________________________________________________________________ |
| | 1244 | void AliMUONTrackReconstructor::EventDumpTrigger(void) |
| | 1245 | { |
| | 1246 | // Dump reconstructed trigger event |
| | 1247 | // and the particle parameters |
| | 1248 | |
| | 1249 | AliMUONTriggerTrack *triggertrack ; |
| | 1250 | Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast(); |
| | 1251 | |
| | 1252 | AliDebug(1, "****** enter EventDumpTrigger ******"); |
| | 1253 | AliDebug(1, Form("Number of Reconstructed tracks : %d ", nTriggerTracks)); |
| | 1254 | |
| | 1255 | // Loop over reconstructed tracks |
| | 1256 | for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) { |
| | 1257 | triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex); |
| | 1258 | printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n", |
| | 1259 | trackIndex, |
| | 1260 | triggertrack->GetX11(),triggertrack->GetY11(), |
| | 1261 | triggertrack->GetThetax(),triggertrack->GetThetay()); |
| | 1262 | } |
| | 1263 | } |
| | 1264 | |
| | 1265 | //__________________________________________________________________________ |
| | 1266 | void AliMUONTrackReconstructor::MakeTrackCandidatesK(void) |
| | 1267 | { |
| | 1268 | // To make initial tracks for Kalman filter from the list of segments |
| | 1269 | Int_t istat, iseg; |
| | 1270 | AliMUONSegment *segment; |
| | 1271 | AliMUONTrackK *trackK; |
| | 1272 | |
| | 1273 | AliDebug(1,"Enter MakeTrackCandidatesK"); |
| | 1274 | |
| | 1275 | AliMUONTrackK a(this, fHitsForRecPtr); |
| | 1276 | // Loop over stations(1...) 5 and 4 |
| | 1277 | for (istat=4; istat>=3; istat--) { |
| | 1278 | // Loop over segments in the station |
| | 1279 | for (iseg=0; iseg<fNSegments[istat]; iseg++) { |
| | 1280 | // Transform segments to tracks and evaluate covariance matrix |
| | 1281 | segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]); |
| | 1282 | trackK = new ((*fRecTracksPtr)[fNRecTracks++]) AliMUONTrackK(segment); |
| | 1283 | } // for (iseg=0;...) |
| | 1284 | } // for (istat=4;...) |
| | 1285 | return; |
| | 1286 | } |
| | 1287 | |
| | 1288 | //__________________________________________________________________________ |
| | 1289 | void AliMUONTrackReconstructor::FollowTracksK(void) |
| | 1290 | { |
| | 1291 | // Follow tracks using Kalman filter |
| | 1292 | Bool_t ok; |
| | 1293 | Int_t icand, ichamBeg = 0, ichamEnd, chamBits; |
| | 1294 | Double_t zDipole1, zDipole2; |
| | 1295 | AliMUONTrackK *trackK; |
| | 1296 | AliMUONHitForRec *hit; |
| | 1297 | AliMUONRawCluster *clus; |
| | 1298 | TClonesArray *rawclusters; |
| | 1299 | clus = 0; rawclusters = 0; |
| | 1300 | |
| | 1301 | zDipole1 = GetSimpleBPosition() + GetSimpleBLength()/2; |
| | 1302 | zDipole2 = zDipole1 - GetSimpleBLength(); |
| | 1303 | |
| | 1304 | // Print hits |
| | 1305 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[0]); |
| | 1306 | |
| | 1307 | if (trackK->DebugLevel() > 0) { |
| | 1308 | for (Int_t i1=0; i1<fNHitsForRec; i1++) { |
| | 1309 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]); |
| | 1310 | printf(" Hit # %d %10.4f %10.4f %10.4f", |
| | 1311 | hit->GetChamberNumber(), hit->GetBendingCoor(), |
| | 1312 | hit->GetNonBendingCoor(), hit->GetZ()); |
| | 1313 | |
| | 1314 | // from raw clusters |
| | 1315 | rawclusters = fMUONData->RawClusters(hit->GetChamberNumber()); |
| | 1316 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit-> |
| | 1317 | GetHitNumber()); |
| | 1318 | printf(" %d", clus->GetTrack(1)); |
| | 1319 | if (clus->GetTrack(2) != -1) printf(" %d \n", clus->GetTrack(2)); |
| | 1320 | else printf("\n"); |
| | 1321 | |
| | 1322 | } |
| | 1323 | } // if (trackK->DebugLevel() > 0) |
| | 1324 | |
| | 1325 | icand = -1; |
| | 1326 | Int_t nSeeds; |
| | 1327 | nSeeds = fNRecTracks; // starting number of seeds |
| | 1328 | // Loop over track candidates |
| | 1329 | while (icand < fNRecTracks-1) { |
| | 1330 | icand ++; |
| | 1331 | if (trackK->DebugLevel()>0) cout << " *** Kalman track candidate No. " << icand << endl; |
| | 1332 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); |
| | 1333 | if (trackK->GetRecover() < 0) continue; // failed track |
| | 1334 | |
| | 1335 | // Discard candidate which will produce the double track |
| | 1336 | /* |
| | 1337 | if (icand > 0) { |
| | 1338 | ok = CheckCandidateK(icand,nSeeds); |
| | 1339 | if (!ok) { |
| | 1340 | trackK->SetRecover(-1); // mark candidate to be removed |
| | 1341 | continue; |
| | 1342 | } |
| | 1343 | } |
| | 1344 | */ |
| | 1345 | |
| | 1346 | ok = kTRUE; |
| | 1347 | if (trackK->GetRecover() == 0) |
| | 1348 | hit = (AliMUONHitForRec*) trackK->GetTrackHits()->Last(); // last hit |
| | 1349 | else |
| | 1350 | hit = trackK->GetHitLastOk(); // hit where track stopped |
| | 1351 | |
| | 1352 | if (hit) ichamBeg = hit->GetChamberNumber(); |
| | 1353 | ichamEnd = 0; |
| | 1354 | // Check propagation direction |
| | 1355 | if (!hit) { ichamBeg = ichamEnd; AliFatal(" ??? "); } |
| | 1356 | else if (trackK->GetTrackDir() < 0) { |
| | 1357 | ichamEnd = 9; // forward propagation |
| | 1358 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); |
| | 1359 | if (ok) { |
| | 1360 | ichamBeg = ichamEnd; |
| | 1361 | ichamEnd = 6; // backward propagation |
| | 1362 | // Change weight matrix and zero fChi2 for backpropagation |
| | 1363 | trackK->StartBack(); |
| | 1364 | trackK->SetTrackDir(1); |
| | 1365 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); |
| | 1366 | ichamBeg = ichamEnd; |
| | 1367 | ichamEnd = 0; |
| | 1368 | } |
| | 1369 | } else { |
| | 1370 | if (trackK->GetBPFlag()) { |
| | 1371 | // backpropagation |
| | 1372 | ichamEnd = 6; // backward propagation |
| | 1373 | // Change weight matrix and zero fChi2 for backpropagation |
| | 1374 | trackK->StartBack(); |
| | 1375 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); |
| | 1376 | ichamBeg = ichamEnd; |
| | 1377 | ichamEnd = 0; |
| | 1378 | } |
| | 1379 | } |
| | 1380 | |
| | 1381 | if (ok) { |
| | 1382 | trackK->SetTrackDir(1); |
| | 1383 | trackK->SetBPFlag(kFALSE); |
| | 1384 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); |
| | 1385 | } |
| | 1386 | if (!ok) { trackK->SetRecover(-1); continue; } // mark candidate to be removed |
| | 1387 | |
| | 1388 | // Apply smoother |
| | 1389 | if (trackK->GetRecover() >= 0) { |
| | 1390 | ok = trackK->Smooth(); |
| | 1391 | if (!ok) trackK->SetRecover(-1); // mark candidate to be removed |
| | 1392 | } |
| | 1393 | |
| | 1394 | // Majority 3 of 4 in first 2 stations |
| | 1395 | if (!ok) continue; |
| | 1396 | chamBits = 0; |
| | 1397 | Double_t chi2max = 0; |
| | 1398 | for (Int_t i=0; i<trackK->GetNTrackHits(); i++) { |
| | 1399 | hit = (AliMUONHitForRec*) (*trackK->GetTrackHits())[i]; |
| | 1400 | chamBits |= BIT(hit->GetChamberNumber()); |
| | 1401 | if (trackK->GetChi2PerPoint(i) > chi2max) chi2max = trackK->GetChi2PerPoint(i); |
| | 1402 | } |
| | 1403 | if (!((chamBits&3)==3 || (chamBits>>2&3)==3) && chi2max > 25) { |
| | 1404 | //trackK->Recover(); |
| | 1405 | trackK->SetRecover(-1); //mark candidate to be removed |
| | 1406 | continue; |
| | 1407 | } |
| | 1408 | if (ok) trackK->SetTrackQuality(0); // compute "track quality" |
| | 1409 | } // while |
| | 1410 | |
| | 1411 | for (Int_t i=0; i<fNRecTracks; i++) { |
| | 1412 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); |
| | 1413 | if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i); |
| | 1414 | } |
| | 1415 | |
| | 1416 | // Compress TClonesArray |
| | 1417 | fRecTracksPtr->Compress(); |
| | 1418 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); |
| | 1419 | return; |
| | 1420 | } |
| | 1421 | |
| | 1422 | //__________________________________________________________________________ |
| | 1423 | Bool_t AliMUONTrackReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) const |
| | 1424 | { |
| | 1425 | // Discards track candidate if it will produce the double track (having |
| | 1426 | // the same seed segment hits as hits of a good track found before) |
| | 1427 | AliMUONTrackK *track1, *track2; |
| | 1428 | AliMUONHitForRec *hit1, *hit2, *hit; |
| | 1429 | |
| | 1430 | track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); |
| | 1431 | hit1 = (AliMUONHitForRec*) (*track1->GetTrackHits())[0]; // 1'st hit |
| | 1432 | hit2 = (AliMUONHitForRec*) (*track1->GetTrackHits())[1]; // 2'nd hit |
| | 1433 | |
| | 1434 | for (Int_t i=0; i<icand; i++) { |
| | 1435 | track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); |
| | 1436 | //if (track2->GetRecover() < 0) continue; |
| | 1437 | if (track2->GetRecover() < 0 && icand >= nSeeds) continue; |
| | 1438 | |
| | 1439 | if (track1->GetStartSegment() == track2->GetStartSegment()) { |
| | 1440 | return kFALSE; |
| | 1441 | } else { |
| | 1442 | Int_t nSame = 0; |
| | 1443 | for (Int_t j=0; j<track2->GetNTrackHits(); j++) { |
| | 1444 | hit = (AliMUONHitForRec*) (*track2->GetTrackHits())[j]; |
| | 1445 | if (hit == hit1 || hit == hit2) { |
| | 1446 | nSame++; |
| | 1447 | if (nSame == 2) return kFALSE; |
| | 1448 | } |
| | 1449 | } // for (Int_t j=0; |
| | 1450 | } |
| | 1451 | } // for (Int_t i=0; |
| | 1452 | return kTRUE; |
| | 1453 | } |
| | 1454 | |
| | 1455 | //__________________________________________________________________________ |
| | 1456 | void AliMUONTrackReconstructor::RemoveDoubleTracksK(void) |
| | 1457 | { |
| | 1458 | // Removes double tracks (sharing more than half of their hits). Keeps |
| | 1459 | // the track with higher quality |
| | 1460 | AliMUONTrackK *track1, *track2, *trackToKill; |
| | 1461 | |
| | 1462 | // Sort tracks according to their quality |
| | 1463 | fRecTracksPtr->Sort(); |
| | 1464 | |
| | 1465 | // Loop over first track of the pair |
| | 1466 | track1 = (AliMUONTrackK*) fRecTracksPtr->First(); |
| | 1467 | Int_t debug = track1->DebugLevel(); |
| | 1468 | while (track1) { |
| | 1469 | // Loop over second track of the pair |
| | 1470 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1); |
| | 1471 | while (track2) { |
| | 1472 | // Check whether or not to keep track2 |
| | 1473 | if (!track2->KeepTrack(track1)) { |
| | 1474 | if (debug >= 0) cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) << |
| | 1475 | " " << track2->GetTrackQuality() << endl; |
| | 1476 | trackToKill = track2; |
| | 1477 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); |
| | 1478 | trackToKill->Kill(); |
| | 1479 | fRecTracksPtr->Compress(); |
| | 1480 | } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); |
| | 1481 | } // track2 |
| | 1482 | track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1); |
| | 1483 | } // track1 |
| | 1484 | |
| | 1485 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); |
| | 1486 | if (debug >= 0) cout << " Number of Kalman tracks: " << fNRecTracks << endl; |
| | 1487 | } |
| | 1488 | |
| | 1489 | //__________________________________________________________________________ |
| | 1490 | void AliMUONTrackReconstructor::GoToVertex(void) |
| | 1491 | { |
| | 1492 | // Propagates track to the vertex thru absorber |
| | 1493 | // (using Branson correction for now) |
| | 1494 | |
| | 1495 | Double_t zVertex; |
| | 1496 | zVertex = 0; |
| | 1497 | for (Int_t i=0; i<fNRecTracks; i++) { |
| | 1498 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson(); |
| | 1499 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2 |
| | 1500 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber |
| | 1501 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(1); // with absorber |
| | 1502 | } |
| | 1503 | } |
| | 1504 | |
| | 1505 | //__________________________________________________________________________ |
| | 1506 | void AliMUONTrackReconstructor::SetTrackMethod(Int_t iTrackMethod) |
| | 1507 | { |
| | 1508 | // Set track method and recreate track container if necessary |
| | 1509 | |
| | 1510 | fTrackMethod = TMath::Min (iTrackMethod, 3); |
| | 1511 | fTrackMethod = TMath::Max (fTrackMethod, 1); |
| | 1512 | if (fTrackMethod != 1) { |
| | 1513 | if (fRecTracksPtr) delete fRecTracksPtr; |
| | 1514 | fRecTracksPtr = new TClonesArray("AliMUONTrackK", 10); |
| | 1515 | if (fTrackMethod == 2) cout << " *** Tracking with the Kalman filter *** " << endl; |
| | 1516 | else cout << " *** Combined cluster / track finder ***" << endl; |
| | 1517 | } else cout << " *** Original tracking *** " << endl; |
| | 1518 | |
| | 1519 | } |
git://git.uio.no / u / mrichter / AliRoot.git / blame_incremental