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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 | //////////////////////////////////// | |
17 | // | |
18 | // MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) | |
19 | // | |
20 | // This class contains as data: | |
21 | // * the parameters for the track reconstruction | |
22 | // * a pointer to the array of hits to be reconstructed (the event) | |
23 | // * a pointer to the array of segments made with these hits inside each station | |
24 | // * a pointer to the array of reconstructed tracks | |
25 | // | |
26 | // It contains as methods, among others: | |
27 | // * MakeEventToBeReconstructed to build the array of hits to be reconstructed | |
28 | // * MakeSegments to build the segments | |
29 | // * MakeTracks to build the tracks | |
30 | // | |
31 | //////////////////////////////////// | |
32 | ||
33 | #include <stdlib.h> | |
34 | #include <Riostream.h> | |
35 | #include <TDirectory.h> | |
36 | #include <TFile.h> | |
37 | #include <TMatrixD.h> //AZ | |
38 | ||
39 | #include "AliMUONTrackReconstructor.h" | |
40 | #include "AliMUON.h" | |
41 | #include "AliMUONConstants.h" | |
42 | #include "AliMUONHitForRec.h" | |
43 | #include "AliMUONTriggerTrack.h" | |
44 | #include "AliMUONTriggerCircuit.h" | |
45 | #include "AliMUONRawCluster.h" | |
46 | #include "AliMUONLocalTrigger.h" | |
47 | #include "AliMUONGlobalTrigger.h" | |
48 | #include "AliMUONSegment.h" | |
49 | #include "AliMUONTrack.h" | |
50 | #include "AliMUONTrackHit.h" | |
51 | #include "AliMagF.h" | |
52 | #include "AliRun.h" // for gAlice | |
53 | #include "AliRunLoader.h" | |
54 | #include "AliLoader.h" | |
55 | #include "AliMUONTrackK.h" //AZ | |
56 | #include "AliMC.h" | |
57 | #include "AliLog.h" | |
58 | #include "AliTrackReference.h" | |
59 | ||
60 | //************* Defaults parameters for reconstruction | |
61 | const Double_t AliMUONTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0; | |
62 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxBendingMomentum = 2000.0; | |
63 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxChi2 = 100.0; | |
64 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxSigma2Distance = 16.0; | |
65 | const Double_t AliMUONTrackReconstructor::fgkDefaultBendingResolution = 0.01; | |
66 | const Double_t AliMUONTrackReconstructor::fgkDefaultNonBendingResolution = 0.144; | |
67 | const Double_t AliMUONTrackReconstructor::fgkDefaultChamberThicknessInX0 = 0.03; | |
68 | // Simple magnetic field: | |
69 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG | |
70 | // Length and Position from reco_muon.F, with opposite sign: | |
71 | // Length = ZMAGEND-ZCOIL | |
72 | // Position = (ZMAGEND+ZCOIL)/2 | |
73 | // to be ajusted differently from real magnetic field ???? | |
74 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBValue = 7.0; | |
75 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBLength = 428.0; | |
76 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBPosition = 1019.0; | |
77 | const Int_t AliMUONTrackReconstructor::fgkDefaultRecTrackRefHits = 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) | |
84 | : TObject() | |
85 | { | |
86 | // Constructor for class AliMUONTrackReconstructor | |
87 | SetReconstructionParametersToDefaults(); | |
88 | fTrackMethod = 1; //AZ - tracking method (1-default, 2-Kalman) | |
89 | // Memory allocation for the TClonesArray of hits for reconstruction | |
90 | // Is 10000 the right size ???? | |
91 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
92 | fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ???? | |
93 | // Memory allocation for the TClonesArray's of segments in stations | |
94 | // Is 2000 the right size ???? | |
95 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { | |
96 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); | |
97 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
98 | } | |
99 | // Memory allocation for the TClonesArray of reconstructed tracks | |
100 | // Is 10 the right size ???? | |
101 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
102 | fNRecTracks = 0; // really needed or GetEntriesFast sufficient ???? | |
103 | // Memory allocation for the TClonesArray of hits on reconstructed tracks | |
104 | // Is 100 the right size ???? | |
105 | //AZ fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100); | |
106 | fRecTrackHitsPtr = new TClonesArray("AliMUONTrackHit", 100); | |
107 | fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ???? | |
108 | ||
109 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,-950). | |
110 | Float_t b[3], x[3]; | |
111 | x[0] = 50.; x[1] = 50.; x[2] = -950.; | |
112 | gAlice->Field()->Field(x, b); | |
113 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); | |
114 | fSimpleBPosition = TMath::Sign(fSimpleBPosition,(Double_t) x[2]); | |
115 | // See how to get fSimple(BValue, BLength, BPosition) | |
116 | // automatically calculated from the actual magnetic field ???? | |
117 | ||
118 | AliDebug(1,"AliMUONTrackReconstructor constructed with defaults"); | |
119 | if ( AliLog::GetGlobalDebugLevel()>0) Dump(); | |
120 | AliDebug(1,"Magnetic field from root file:"); | |
121 | if ( AliLog::GetGlobalDebugLevel()>0) gAlice->Field()->Dump(); | |
122 | ||
123 | ||
124 | // Initializions for track ref. background events | |
125 | fBkgTrackRefFile = 0; | |
126 | fBkgTrackRefTK = 0; | |
127 | fBkgTrackRefParticles = 0; | |
128 | fBkgTrackRefTTR = 0; | |
129 | fBkgTrackRefEventNumber = -1; | |
130 | ||
131 | // initialize loader's | |
132 | fLoader = loader; | |
133 | ||
134 | // initialize container | |
135 | fMUONData = new AliMUONData(fLoader,"MUON","MUON"); | |
136 | ||
137 | return; | |
138 | } | |
139 | //__________________________________________________________________________ | |
140 | AliMUONTrackReconstructor::AliMUONTrackReconstructor (const AliMUONTrackReconstructor& rhs) | |
141 | : TObject(rhs) | |
142 | { | |
143 | // Protected copy constructor | |
144 | ||
145 | AliFatal("Not implemented."); | |
146 | } | |
147 | ||
148 | AliMUONTrackReconstructor & | |
149 | AliMUONTrackReconstructor::operator=(const AliMUONTrackReconstructor& rhs) | |
150 | { | |
151 | // Protected assignement operator | |
152 | ||
153 | if (this == &rhs) return *this; | |
154 | ||
155 | AliFatal("Not implemented."); | |
156 | ||
157 | return *this; | |
158 | } | |
159 | ||
160 | //__________________________________________________________________________ | |
161 | AliMUONTrackReconstructor::~AliMUONTrackReconstructor(void) | |
162 | { | |
163 | // Destructor for class AliMUONTrackReconstructor | |
164 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? | |
165 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) | |
166 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? | |
167 | return; | |
168 | } | |
169 | ||
170 | //__________________________________________________________________________ | |
171 | void AliMUONTrackReconstructor::SetReconstructionParametersToDefaults(void) | |
172 | { | |
173 | // Set reconstruction parameters to default values | |
174 | // Would be much more convenient with a structure (or class) ???? | |
175 | fMinBendingMomentum = fgkDefaultMinBendingMomentum; | |
176 | fMaxBendingMomentum = fgkDefaultMaxBendingMomentum; | |
177 | fMaxChi2 = fgkDefaultMaxChi2; | |
178 | fMaxSigma2Distance = fgkDefaultMaxSigma2Distance; | |
179 | ||
180 | // ******** Parameters for making HitsForRec | |
181 | // minimum radius, | |
182 | // like in TRACKF_STAT: | |
183 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; | |
184 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 | |
185 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
186 | if (ch < 4) fRMin[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * | |
187 | 2.0 * TMath::Pi() / 180.0; | |
188 | else fRMin[ch] = 30.0; | |
189 | // maximum radius at 10 degrees and Z of chamber | |
190 | fRMax[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * | |
191 | 10.0 * TMath::Pi() / 180.0; | |
192 | } | |
193 | ||
194 | // ******** Parameters for making segments | |
195 | // should be parametrized ???? | |
196 | // according to interval between chambers in a station ???? | |
197 | // Maximum distance in non bending plane | |
198 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
199 | // SIGCUT*DYMAX(IZ) | |
200 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) | |
201 | fSegmentMaxDistNonBending[st] = 5. * 0.22; | |
202 | // Maximum distance in bending plane: | |
203 | // values from TRACKF_STAT, corresponding to (J psi 20cm), | |
204 | // scaled to the real distance between chambers in a station | |
205 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * | |
206 | (AliMUONConstants::DefaultChamberZ(1) - AliMUONConstants::DefaultChamberZ(0)) / 20.0); | |
207 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * | |
208 | (AliMUONConstants::DefaultChamberZ(3) - AliMUONConstants::DefaultChamberZ(2)) / 20.0); | |
209 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * | |
210 | (AliMUONConstants::DefaultChamberZ(5) - AliMUONConstants::DefaultChamberZ(4)) / 20.0); | |
211 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * | |
212 | (AliMUONConstants::DefaultChamberZ(7) - AliMUONConstants::DefaultChamberZ(6)) / 20.0); | |
213 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * | |
214 | (AliMUONConstants::DefaultChamberZ(9) - AliMUONConstants::DefaultChamberZ(8)) / 20.0); | |
215 | ||
216 | ||
217 | fBendingResolution = fgkDefaultBendingResolution; | |
218 | fNonBendingResolution = fgkDefaultNonBendingResolution; | |
219 | fChamberThicknessInX0 = fgkDefaultChamberThicknessInX0; | |
220 | fSimpleBValue = fgkDefaultSimpleBValue; | |
221 | fSimpleBLength = fgkDefaultSimpleBLength; | |
222 | fSimpleBPosition = fgkDefaultSimpleBPosition; | |
223 | fRecTrackRefHits = fgkDefaultRecTrackRefHits; | |
224 | fEfficiency = fgkDefaultEfficiency; | |
225 | return; | |
226 | } | |
227 | ||
228 | //__________________________________________________________________________ | |
229 | Double_t AliMUONTrackReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const | |
230 | { | |
231 | // Returns impact parameter at vertex in bending plane (cm), | |
232 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
233 | // using simple values for dipole magnetic field. | |
234 | // The sign of "BendingMomentum" is the sign of the charge. | |
235 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
236 | BendingMomentum); | |
237 | } | |
238 | ||
239 | //__________________________________________________________________________ | |
240 | Double_t AliMUONTrackReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const | |
241 | { | |
242 | // Returns signed bending momentum in bending plane (GeV/c), | |
243 | // the sign being the sign of the charge for particles moving forward in Z, | |
244 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), | |
245 | // using simple values for dipole magnetic field. | |
246 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
247 | ImpactParam); | |
248 | } | |
249 | ||
250 | //__________________________________________________________________________ | |
251 | void AliMUONTrackReconstructor::SetBkgTrackRefFile(Text_t *BkgTrackRefFileName) | |
252 | { | |
253 | // Set background file ... for track ref. hits | |
254 | // Must be called after having loaded the firts signal event | |
255 | AliDebug(1,Form("Enter SetBkgTrackRefFile with BkgTrackRefFileName %s",BkgTrackRefFileName)); | |
256 | ||
257 | if (strlen(BkgTrackRefFileName)) { | |
258 | // BkgTrackRefFileName not empty: try to open the file | |
259 | ||
260 | if(AliLog::GetGlobalDebugLevel()>1) { | |
261 | cout << "Before File(Bkg)" << endl; gDirectory->Dump(); | |
262 | } | |
263 | fBkgTrackRefFile = new TFile(BkgTrackRefFileName); | |
264 | if(AliLog::GetGlobalDebugLevel()>1) { | |
265 | cout << "After File(Bkg)" << endl; gDirectory->Dump(); | |
266 | } | |
267 | if (fBkgTrackRefFile-> IsOpen()) { | |
268 | if(AliLog::GetGlobalDebugLevel()>0) { | |
269 | cout << "Background for Track ref. hits in file: ``" << BkgTrackRefFileName | |
270 | << "'' successfully opened" << endl;} | |
271 | } | |
272 | else { | |
273 | cout << "Background for Track Ref. hits in file: " << BkgTrackRefFileName << endl; | |
274 | cout << "NOT FOUND: EXIT" << endl; | |
275 | exit(0); // right instruction for exit ???? | |
276 | } | |
277 | // Arrays for "particles" and "hits" | |
278 | fBkgTrackRefParticles = new TClonesArray("TParticle", 200); | |
279 | // Event number to -1 for initialization | |
280 | fBkgTrackRefEventNumber = -1; | |
281 | // Back to the signal file: | |
282 | // first signal event must have been loaded previously, | |
283 | // otherwise, Segmentation violation at the next instruction | |
284 | // How is it possible to do smething better ???? | |
285 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
286 | if(AliLog::GetGlobalDebugLevel()>1) cout << "After cd(gAlice)" << endl; gDirectory->Dump(); | |
287 | } | |
288 | return; | |
289 | } | |
290 | ||
291 | //__________________________________________________________________________ | |
292 | void AliMUONTrackReconstructor::NextBkgTrackRefEvent(void) | |
293 | { | |
294 | // Get next event in background file for track ref. hits | |
295 | // Goes back to event number 0 when end of file is reached | |
296 | char treeName[20]; | |
297 | ||
298 | AliDebug(1,"Enter NextBkgTrackRefEvent"); | |
299 | // Clean previous event | |
300 | if(fBkgTrackRefTK) delete fBkgTrackRefTK; | |
301 | fBkgTrackRefTK = NULL; | |
302 | if(fBkgTrackRefParticles) fBkgTrackRefParticles->Clear(); | |
303 | if(fBkgTrackRefTTR) delete fBkgTrackRefTTR; | |
304 | fBkgTrackRefTTR = NULL; | |
305 | // Increment event number | |
306 | fBkgTrackRefEventNumber++; | |
307 | // Get access to Particles and Hits for event from background file | |
308 | if (AliLog::GetGlobalDebugLevel()>1) cout << "Before cd(Bkg)" << endl; gDirectory->Dump(); | |
309 | fBkgTrackRefFile->cd(); | |
310 | if (AliLog::GetGlobalDebugLevel()>1) cout << "After cd(Bkg)" << endl; gDirectory->Dump(); | |
311 | // Particles: TreeK for event and branch "Particles" | |
312 | sprintf(treeName, "TreeK%d", fBkgTrackRefEventNumber); | |
313 | fBkgTrackRefTK = (TTree*)gDirectory->Get(treeName); | |
314 | if (!fBkgTrackRefTK) { | |
315 | ||
316 | AliDebug(1,Form("Cannot find Kine Tree for background event: %d",fBkgTrackRefEventNumber)); | |
317 | AliDebug(1,"Goes back to event 0"); | |
318 | ||
319 | fBkgTrackRefEventNumber = 0; | |
320 | sprintf(treeName, "TreeK%d", fBkgTrackRefEventNumber); | |
321 | fBkgTrackRefTK = (TTree*)gDirectory->Get(treeName); | |
322 | if (!fBkgTrackRefTK) { | |
323 | AliError(Form("cannot find Kine Tree for background event: %d",fBkgTrackRefEventNumber)); | |
324 | exit(0); | |
325 | } | |
326 | } | |
327 | if (fBkgTrackRefTK) | |
328 | fBkgTrackRefTK->SetBranchAddress("Particles", &fBkgTrackRefParticles); | |
329 | fBkgTrackRefTK->GetEvent(0); // why event 0 ???? necessary ???? | |
330 | // Hits: TreeH for event and branch "MUON" | |
331 | sprintf(treeName, "TreeTR%d", fBkgTrackRefEventNumber); | |
332 | fBkgTrackRefTTR = (TTree*)gDirectory->Get(treeName); | |
333 | if (!fBkgTrackRefTTR) { | |
334 | AliError(Form("cannot find Hits Tree for background event: %d",fBkgTrackRefEventNumber)); | |
335 | exit(0); | |
336 | } | |
337 | fBkgTrackRefTTR->GetEntries(); // necessary ???? | |
338 | // Back to the signal file | |
339 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
340 | if (AliLog::GetGlobalDebugLevel()>1) | |
341 | cout << "After cd(gAlice)" << endl; gDirectory->Dump(); | |
342 | return; | |
343 | } | |
344 | ||
345 | //__________________________________________________________________________ | |
346 | void AliMUONTrackReconstructor::EventReconstruct(void) | |
347 | { | |
348 | // To reconstruct one event | |
349 | AliDebug(1,"Enter EventReconstruct"); | |
350 | MakeEventToBeReconstructed(); | |
351 | MakeSegments(); | |
352 | MakeTracks(); | |
353 | if (fMUONData->IsTriggerTrackBranchesInTree()) | |
354 | ValidateTracksWithTrigger(); | |
355 | ||
356 | // Add tracks to MUON data container | |
357 | for(Int_t i=0; i<GetNRecTracks(); i++) { | |
358 | AliMUONTrack * track = (AliMUONTrack*) GetRecTracksPtr()->At(i); | |
359 | fMUONData->AddRecTrack(*track); | |
360 | } | |
361 | ||
362 | return; | |
363 | } | |
364 | ||
365 | //__________________________________________________________________________ | |
366 | void AliMUONTrackReconstructor::EventReconstructTrigger(void) | |
367 | { | |
368 | // To reconstruct one event | |
369 | AliDebug(1,"Enter EventReconstructTrigger"); | |
370 | MakeTriggerTracks(); | |
371 | return; | |
372 | } | |
373 | ||
374 | //__________________________________________________________________________ | |
375 | void AliMUONTrackReconstructor::ResetHitsForRec(void) | |
376 | { | |
377 | // To reset the array and the number of HitsForRec, | |
378 | // and also the number of HitsForRec | |
379 | // and the index of the first HitForRec per chamber | |
380 | if (fHitsForRecPtr) fHitsForRecPtr->Clear(); | |
381 | fNHitsForRec = 0; | |
382 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
383 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
384 | return; | |
385 | } | |
386 | ||
387 | //__________________________________________________________________________ | |
388 | void AliMUONTrackReconstructor::ResetSegments(void) | |
389 | { | |
390 | // To reset the TClonesArray of segments and the number of Segments | |
391 | // for all stations | |
392 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { | |
393 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); | |
394 | fNSegments[st] = 0; | |
395 | } | |
396 | return; | |
397 | } | |
398 | ||
399 | //__________________________________________________________________________ | |
400 | void AliMUONTrackReconstructor::ResetTracks(void) | |
401 | { | |
402 | // To reset the TClonesArray of reconstructed tracks | |
403 | if (fRecTracksPtr) fRecTracksPtr->Delete(); | |
404 | // Delete in order that the Track destructors are called, | |
405 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
406 | fNRecTracks = 0; | |
407 | return; | |
408 | } | |
409 | ||
410 | ||
411 | //__________________________________________________________________________ | |
412 | void AliMUONTrackReconstructor::ResetTrackHits(void) | |
413 | { | |
414 | // To reset the TClonesArray of hits on reconstructed tracks | |
415 | if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear(); | |
416 | fNRecTrackHits = 0; | |
417 | return; | |
418 | } | |
419 | ||
420 | //__________________________________________________________________________ | |
421 | void AliMUONTrackReconstructor::MakeEventToBeReconstructed(void) | |
422 | { | |
423 | // To make the list of hits to be reconstructed, | |
424 | // either from the track ref. hits or from the raw clusters | |
425 | // according to the parameter set for the reconstructor | |
426 | // TString evfoldname = AliConfig::GetDefaultEventFolderName();//to be interfaced properly | |
427 | ||
428 | // AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname); | |
429 | // if (rl == 0x0) | |
430 | // { | |
431 | // Error("MakeEventToBeReconstructed", | |
432 | // "Can not find Run Loader in Event Folder named %s.", | |
433 | // evfoldname.Data()); | |
434 | // return; | |
435 | // } | |
436 | // AliLoader* gime = rl->GetLoader("MUONLoader"); | |
437 | // if (gime == 0x0) | |
438 | // { | |
439 | // Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader."); | |
440 | // return; | |
441 | // } | |
442 | AliRunLoader *runLoader = fLoader->GetRunLoader(); | |
443 | ||
444 | AliDebug(1,"Enter MakeEventToBeReconstructed"); | |
445 | ResetHitsForRec(); | |
446 | if (fRecTrackRefHits == 1) { | |
447 | // Reconstruction from track ref. hits | |
448 | // Back to the signal file | |
449 | TTree* treeTR = runLoader->TreeTR(); | |
450 | if (treeTR == 0x0) | |
451 | { | |
452 | Int_t retval = runLoader->LoadTrackRefs("READ"); | |
453 | if ( retval) | |
454 | { | |
455 | AliError("Error occured while loading hits."); | |
456 | return; | |
457 | } | |
458 | treeTR = runLoader->TreeTR(); | |
459 | if (treeTR == 0x0) | |
460 | { | |
461 | AliError("Can not get TreeTR"); | |
462 | return; | |
463 | } | |
464 | } | |
465 | ||
466 | AddHitsForRecFromTrackRef(treeTR,1); | |
467 | ||
468 | // Background hits | |
469 | AddHitsForRecFromTrackRef(fBkgTrackRefTTR,0); | |
470 | // Sort HitsForRec in increasing order with respect to chamber number | |
471 | SortHitsForRecWithIncreasingChamber(); | |
472 | } | |
473 | else { | |
474 | // Reconstruction from raw clusters | |
475 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
476 | // Security on MUON ???? | |
477 | // TreeR assumed to be be "prepared" in calling function | |
478 | // by "MUON->GetTreeR(nev)" ???? | |
479 | TTree *treeR = fLoader->TreeR(); | |
480 | fMUONData->SetTreeAddress("RC"); | |
481 | AddHitsForRecFromRawClusters(treeR); | |
482 | // No sorting: it is done automatically in the previous function | |
483 | } | |
484 | ||
485 | AliDebug(1,"End of MakeEventToBeReconstructed"); | |
486 | if (AliLog::GetGlobalDebugLevel() > 0) { | |
487 | AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec)); | |
488 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
489 | AliDebug(1, Form("Chamber(0...): %d",ch)); | |
490 | AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch])); | |
491 | AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch])); | |
492 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
493 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
494 | hit++) { | |
495 | AliDebug(1, Form("HitForRec index(0...): %d",hit)); | |
496 | ((*fHitsForRecPtr)[hit])->Dump(); | |
497 | } | |
498 | } | |
499 | } | |
500 | return; | |
501 | } | |
502 | ||
503 | //__________________________________________________________________________ | |
504 | void AliMUONTrackReconstructor::AddHitsForRecFromTrackRef(TTree *TTR, Int_t signal) | |
505 | { | |
506 | // To add to the list of hits for reconstruction | |
507 | // the signal hits from a track reference tree TreeTR. | |
508 | TClonesArray *listOfTrackRefs = NULL; | |
509 | AliTrackReference *trackRef; | |
510 | ||
511 | Int_t track = 0; | |
512 | AliDebug(2,Form("Enter AddHitsForRecFromTrackRef with TTR: %d", TTR)); | |
513 | if (TTR == NULL) return; | |
514 | ||
515 | listOfTrackRefs = CleanTrackRefs(TTR); | |
516 | ||
517 | Int_t ntracks = listOfTrackRefs->GetEntriesFast(); | |
518 | ||
519 | AliDebug(2,Form("ntracks: %d", ntracks)); | |
520 | ||
521 | for (Int_t index = 0; index < ntracks; index++) { | |
522 | trackRef = (AliTrackReference*) listOfTrackRefs->At(index); | |
523 | track = trackRef->GetTrack(); | |
524 | ||
525 | NewHitForRecFromTrackRef(trackRef,track,signal); | |
526 | } // end of track ref. | |
527 | ||
528 | listOfTrackRefs->Delete(); | |
529 | delete listOfTrackRefs; | |
530 | return; | |
531 | } | |
532 | ||
533 | ||
534 | //__________________________________________________________________________ | |
535 | AliMUONHitForRec* AliMUONTrackReconstructor::NewHitForRecFromTrackRef(AliTrackReference* Hit, Int_t TrackNumber, Int_t Signal) | |
536 | { | |
537 | // To make a new hit for reconstruction from a track ref. hit pointed to by "Hit", | |
538 | // with the track numbered "TrackNumber", | |
539 | // either from signal ("Signal" = 1) or background ("Signal" = 0) event. | |
540 | // Selects hits in tracking (not trigger) chambers. | |
541 | // Takes into account the efficiency (fEfficiency) | |
542 | // and the smearing from resolution (fBendingResolution and fNonBendingResolution). | |
543 | // Adds a condition on the radius between RMin and RMax | |
544 | // to better simulate the real chambers. | |
545 | // Returns the pointer to the new hit for reconstruction, | |
546 | // or NULL in case of inefficiency or non tracking chamber or bad radius. | |
547 | // No condition on at most 20 cm from a muon from a resonance | |
548 | // like in Fortran TRACKF_STAT. | |
549 | AliMUONHitForRec* hitForRec; | |
550 | Double_t bendCoor, nonBendCoor, radius; | |
551 | Int_t chamber = AliMUONConstants::ChamberNumber(Hit->Z()); // chamber(0...) | |
552 | if (chamber < 0) return NULL; | |
553 | // only in tracking chambers (fChamber starts at 1) | |
554 | if (chamber >= AliMUONConstants::NTrackingCh()) return NULL; | |
555 | // only if hit is efficient (keep track for checking ????) | |
556 | if (gRandom->Rndm() > fEfficiency) return NULL; | |
557 | // only if radius between RMin and RMax | |
558 | bendCoor = Hit->Y(); | |
559 | nonBendCoor = Hit->X(); | |
560 | radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor)); | |
561 | // This cut is not needed with a realistic chamber geometry !!!! | |
562 | // if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL; | |
563 | // new AliMUONHitForRec from track ref. hit and increment number of AliMUONHitForRec's | |
564 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit); | |
565 | fNHitsForRec++; | |
566 | // add smearing from resolution | |
567 | hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution)); | |
568 | hitForRec->SetNonBendingCoor(nonBendCoor | |
569 | + gRandom->Gaus(0., fNonBendingResolution)); | |
570 | // // !!!! without smearing | |
571 | // hitForRec->SetBendingCoor(bendCoor); | |
572 | // hitForRec->SetNonBendingCoor(nonBendCoor); | |
573 | // more information into HitForRec | |
574 | // resolution: angular effect to be added here ???? | |
575 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
576 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
577 | // track ref. info | |
578 | hitForRec->SetTTRTrack(TrackNumber); | |
579 | hitForRec->SetTrackRefSignal(Signal); | |
580 | if (AliLog::GetGlobalDebugLevel()> 1) { | |
581 | AliDebug(2,Form("Track: %d", TrackNumber)); | |
582 | Hit->Dump(); | |
583 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
584 | hitForRec->Dump(); | |
585 | } | |
586 | return hitForRec; | |
587 | } | |
588 | //__________________________________________________________________________ | |
589 | TClonesArray* AliMUONTrackReconstructor::CleanTrackRefs(TTree *treeTR) | |
590 | { | |
591 | // Make hits from track ref.. | |
592 | // Re-calculate hits parameters because two AliTrackReferences are recorded for | |
593 | // each chamber (one when particle is entering + one when particle is leaving | |
594 | // the sensitive volume) | |
595 | ||
596 | AliTrackReference *trackReference; | |
597 | Float_t x1, y1, z1, pX1, pY1, pZ1; | |
598 | Float_t x2, y2, z2, pX2, pY2, pZ2; | |
599 | Int_t track1, track2; | |
600 | Int_t nRec = 0; | |
601 | Float_t maxGasGap = 1.; // cm | |
602 | Int_t iHit1 = 0; | |
603 | Int_t iHitMin = 0; | |
604 | ||
605 | AliTrackReference *trackReferenceNew = new AliTrackReference(); | |
606 | ||
607 | TClonesArray* trackRefs = new TClonesArray("AliTrackReference", 10); | |
608 | TClonesArray* cleanTrackRefs = new TClonesArray("AliTrackReference", 10); | |
609 | ||
610 | if (treeTR == NULL) return NULL; | |
611 | TBranch* branch = treeTR->GetBranch("MUON"); | |
612 | if (branch == NULL) return NULL; | |
613 | branch->SetAddress(&trackRefs); | |
614 | ||
615 | Int_t nTrack = (Int_t)treeTR->GetEntries(); | |
616 | for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) { | |
617 | treeTR->GetEntry(iTrack); | |
618 | iHitMin = 0; | |
619 | iHit1 = 0; | |
620 | while (iHit1 < trackRefs->GetEntries()) { | |
621 | trackReference = (AliTrackReference*)trackRefs->At(iHit1); | |
622 | x1 = trackReference->X(); | |
623 | y1 = trackReference->Y(); | |
624 | z1 = trackReference->Z(); | |
625 | pX1 = trackReference->Px(); | |
626 | pY1 = trackReference->Py(); | |
627 | pZ1 = trackReference->Pz(); | |
628 | track1 = trackReference->GetTrack(); | |
629 | nRec = 1; | |
630 | iHitMin = iHit1+1; | |
631 | for (Int_t iHit2 = iHit1+1; iHit2 < trackRefs->GetEntries(); iHit2++) { | |
632 | trackReference = (AliTrackReference*)trackRefs->At(iHit2); | |
633 | x2 = trackReference->X(); | |
634 | y2 = trackReference->Y(); | |
635 | z2 = trackReference->Z(); | |
636 | pX2 = trackReference->Px(); | |
637 | pY2 = trackReference->Py(); | |
638 | pZ2 = trackReference->Pz(); | |
639 | track2 = trackReference->GetTrack(); | |
640 | if (track2 == track1 && TMath::Abs(z2-z1) < maxGasGap ) { | |
641 | nRec++; | |
642 | x1 += x2; | |
643 | y1 += y2; | |
644 | z1 += z2; | |
645 | pX1 += pX2; | |
646 | pY1 += pY2; | |
647 | pZ1 += pZ2; | |
648 | iHitMin = iHit2+1; | |
649 | } | |
650 | ||
651 | } // for iHit2 | |
652 | x1 /= (Float_t)nRec; | |
653 | y1 /= (Float_t)nRec; | |
654 | z1 /= (Float_t)nRec; | |
655 | pX1 /= (Float_t)nRec; | |
656 | pY1 /= (Float_t)nRec; | |
657 | pZ1 /= (Float_t)nRec; | |
658 | trackReferenceNew->SetPosition(x1,y1,z1); | |
659 | trackReferenceNew->SetMomentum(pX1,pY1,pZ1); | |
660 | trackReferenceNew->SetTrack(track1); | |
661 | {new ((*cleanTrackRefs)[cleanTrackRefs->GetEntriesFast()]) AliTrackReference(*trackReferenceNew);} | |
662 | iHit1 = iHitMin; | |
663 | } // while iHit1 | |
664 | } // for track | |
665 | ||
666 | trackRefs->Delete(); | |
667 | delete trackRefs; | |
668 | delete trackReferenceNew; | |
669 | return cleanTrackRefs; | |
670 | ||
671 | } | |
672 | //__________________________________________________________________________ | |
673 | void AliMUONTrackReconstructor::SortHitsForRecWithIncreasingChamber() | |
674 | { | |
675 | // Sort HitsForRec's in increasing order with respect to chamber number. | |
676 | // Uses the function "Compare". | |
677 | // Update the information for HitsForRec per chamber too. | |
678 | Int_t ch, nhits, prevch; | |
679 | fHitsForRecPtr->Sort(); | |
680 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
681 | fNHitsForRecPerChamber[ch] = 0; | |
682 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
683 | } | |
684 | prevch = 0; // previous chamber | |
685 | nhits = 0; // number of hits in current chamber | |
686 | // Loop over HitsForRec | |
687 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
688 | // chamber number (0...) | |
689 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
690 | // increment number of hits in current chamber | |
691 | (fNHitsForRecPerChamber[ch])++; | |
692 | // update index of first HitForRec in current chamber | |
693 | // if chamber number different from previous one | |
694 | if (ch != prevch) { | |
695 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
696 | prevch = ch; | |
697 | } | |
698 | } | |
699 | return; | |
700 | } | |
701 | ||
702 | //__________________________________________________________________________ | |
703 | void AliMUONTrackReconstructor::AddHitsForRecFromRawClusters(TTree* TR) | |
704 | { | |
705 | // To add to the list of hits for reconstruction all the raw clusters | |
706 | // No condition added, like in Fortran TRACKF_STAT, | |
707 | // on the radius between RMin and RMax. | |
708 | AliMUONHitForRec *hitForRec; | |
709 | AliMUONRawCluster *clus; | |
710 | Int_t iclus, nclus, nTRentries; | |
711 | TClonesArray *rawclusters; | |
712 | AliDebug(1,"Enter AddHitsForRecFromRawClusters"); | |
713 | ||
714 | nTRentries = Int_t(TR->GetEntries()); | |
715 | if (nTRentries != 1) { | |
716 | AliError(Form("nTRentries = %d not equal to 1 ",nTRentries)); | |
717 | exit(0); | |
718 | } | |
719 | fLoader->TreeR()->GetEvent(0); // only one entry | |
720 | ||
721 | // Loop over tracking chambers | |
722 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
723 | // number of HitsForRec to 0 for the chamber | |
724 | fNHitsForRecPerChamber[ch] = 0; | |
725 | // index of first HitForRec for the chamber | |
726 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
727 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
728 | rawclusters =fMUONData->RawClusters(ch); | |
729 | // pMUON->ResetRawClusters(); | |
730 | // TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ???? | |
731 | nclus = (Int_t) (rawclusters->GetEntries()); | |
732 | // Loop over (cathode correlated) raw clusters | |
733 | for (iclus = 0; iclus < nclus; iclus++) { | |
734 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); | |
735 | // new AliMUONHitForRec from raw cluster | |
736 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
737 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
738 | fNHitsForRec++; | |
739 | (fNHitsForRecPerChamber[ch])++; | |
740 | // more information into HitForRec | |
741 | // resolution: info should be already in raw cluster and taken from it ???? | |
742 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
743 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
744 | // original raw cluster | |
745 | hitForRec->SetChamberNumber(ch); | |
746 | hitForRec->SetHitNumber(iclus); | |
747 | // Z coordinate of the raw cluster (cm) | |
748 | hitForRec->SetZ(clus->GetZ(0)); | |
749 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
750 | cout << "chamber (0...): " << ch << | |
751 | " raw cluster (0...): " << iclus << endl; | |
752 | clus->Dump(); | |
753 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
754 | hitForRec->Dump();} | |
755 | } // end of cluster loop | |
756 | } // end of chamber loop | |
757 | SortHitsForRecWithIncreasingChamber(); //AZ | |
758 | return; | |
759 | } | |
760 | ||
761 | //__________________________________________________________________________ | |
762 | void AliMUONTrackReconstructor::MakeSegments(void) | |
763 | { | |
764 | // To make the list of segments in all stations, | |
765 | // from the list of hits to be reconstructed | |
766 | AliDebug(1,"Enter MakeSegments"); | |
767 | ResetSegments(); | |
768 | // Loop over stations | |
769 | Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ | |
770 | //AZ for (Int_t st = 0; st < fgkMaxMuonTrackingStations; st++) | |
771 | for (Int_t st = nb; st < AliMUONConstants::NTrackingCh()/2; st++) //AZ | |
772 | MakeSegmentsPerStation(st); | |
773 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
774 | cout << "end of MakeSegments" << endl; | |
775 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { | |
776 | cout << "station(0...): " << st | |
777 | << " Segments: " << fNSegments[st] | |
778 | << endl; | |
779 | for (Int_t seg = 0; | |
780 | seg < fNSegments[st]; | |
781 | seg++) { | |
782 | cout << "Segment index(0...): " << seg << endl; | |
783 | ((*fSegmentsPtr[st])[seg])->Dump(); | |
784 | } | |
785 | } | |
786 | } | |
787 | return; | |
788 | } | |
789 | ||
790 | //__________________________________________________________________________ | |
791 | void AliMUONTrackReconstructor::MakeSegmentsPerStation(Int_t Station) | |
792 | { | |
793 | // To make the list of segments in station number "Station" (0...) | |
794 | // from the list of hits to be reconstructed. | |
795 | // Updates "fNSegments"[Station]. | |
796 | // Segments in stations 4 and 5 are sorted | |
797 | // according to increasing absolute value of "impact parameter" | |
798 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
799 | AliMUONSegment *segment; | |
800 | Bool_t last2st; | |
801 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
802 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. | |
803 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",Station)); | |
804 | // first and second chambers (0...) in the station | |
805 | Int_t ch1 = 2 * Station; | |
806 | Int_t ch2 = ch1 + 1; | |
807 | // variable true for stations downstream of the dipole: | |
808 | // Station(0..4) equal to 3 or 4 | |
809 | if ((Station == 3) || (Station == 4)) { | |
810 | last2st = kTRUE; | |
811 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
812 | maxImpactParam = | |
813 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
814 | // minimum impact parameter (cm) according to fMaxBendingMomentum... | |
815 | minImpactParam = | |
816 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); | |
817 | } | |
818 | else last2st = kFALSE; | |
819 | // extrapolation factor from Z of first chamber to Z of second chamber | |
820 | // dZ to be changed to take into account fine structure of chambers ???? | |
821 | Double_t extrapFact; | |
822 | // index for current segment | |
823 | Int_t segmentIndex = 0; | |
824 | // Loop over HitsForRec in the first chamber of the station | |
825 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
826 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
827 | hit1++) { | |
828 | // pointer to the HitForRec | |
829 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
830 | // extrapolation, | |
831 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
832 | // to the Z of the second chamber of the station | |
833 | // Loop over HitsForRec in the second chamber of the station | |
834 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
835 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
836 | hit2++) { | |
837 | // pointer to the HitForRec | |
838 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
839 | // absolute values of distances, in bending and non bending planes, | |
840 | // between the HitForRec in the second chamber | |
841 | // and the previous extrapolation | |
842 | extrapFact = hit2Ptr->GetZ()/ hit1Ptr->GetZ(); | |
843 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
844 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
845 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); | |
846 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
847 | if (last2st) { | |
848 | // bending slope | |
849 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
850 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
851 | // absolute value of impact parameter | |
852 | impactParam = | |
853 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); | |
854 | } | |
855 | // check for distances not too large, | |
856 | // and impact parameter not too big if stations downstream of the dipole. | |
857 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
858 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
859 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
860 | (!last2st || (impactParam < maxImpactParam)) && | |
861 | (!last2st || (impactParam > minImpactParam))) { | |
862 | // make new segment | |
863 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
864 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
865 | // update "link" to this segment from the hit in the first chamber | |
866 | if (hit1Ptr->GetNSegments() == 0) | |
867 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
868 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
869 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
870 | cout << "segmentIndex(0...): " << segmentIndex | |
871 | << " distBend: " << distBend | |
872 | << " distNonBend: " << distNonBend | |
873 | << endl; | |
874 | segment->Dump(); | |
875 | cout << "HitForRec in first chamber" << endl; | |
876 | hit1Ptr->Dump(); | |
877 | cout << "HitForRec in second chamber" << endl; | |
878 | hit2Ptr->Dump(); | |
879 | }; | |
880 | // increment index for current segment | |
881 | segmentIndex++; | |
882 | } | |
883 | } //for (Int_t hit2 | |
884 | } // for (Int_t hit1... | |
885 | fNSegments[Station] = segmentIndex; | |
886 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
887 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
888 | // After this sorting, it is impossible to use | |
889 | // the "fNSegments" and "fIndexOfFirstSegment" | |
890 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
891 | // Is this sorting really needed ???? | |
892 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
893 | AliDebug(1,Form("Station: %d NSegments: %d ", Station, fNSegments[Station])); | |
894 | return; | |
895 | } | |
896 | ||
897 | //__________________________________________________________________________ | |
898 | void AliMUONTrackReconstructor::MakeTracks(void) | |
899 | { | |
900 | // To make the tracks, | |
901 | // from the list of segments and points in all stations | |
902 | AliDebug(1,"Enter MakeTracks"); | |
903 | // The order may be important for the following Reset's | |
904 | ResetTracks(); | |
905 | ResetTrackHits(); | |
906 | if (fTrackMethod == 2) { //AZ - Kalman filter | |
907 | MakeTrackCandidatesK(); | |
908 | if (fRecTracksPtr->GetEntriesFast() == 0) return; | |
909 | // Follow tracks in stations(1..) 3, 2 and 1 | |
910 | FollowTracksK(); | |
911 | // Remove double tracks | |
912 | RemoveDoubleTracksK(); | |
913 | // Propagate tracks to the vertex thru absorber | |
914 | GoToVertex(); | |
915 | // Fill AliMUONTrack data members | |
916 | FillMUONTrack(); | |
917 | } else { | |
918 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
919 | MakeTrackCandidates(); | |
920 | // Follow tracks in stations(1..) 3, 2 and 1 | |
921 | FollowTracks(); | |
922 | // Remove double tracks | |
923 | RemoveDoubleTracks(); | |
924 | UpdateTrackParamAtHit(); | |
925 | UpdateHitForRecAtHit(); | |
926 | } | |
927 | return; | |
928 | } | |
929 | ||
930 | //__________________________________________________________________________ | |
931 | void AliMUONTrackReconstructor::ValidateTracksWithTrigger(void) | |
932 | { | |
933 | // Try to match track from tracking system with trigger track | |
934 | AliMUONTrack *track; | |
935 | TClonesArray *recTriggerTracks; | |
936 | ||
937 | fMUONData->SetTreeAddress("RL"); | |
938 | fMUONData->GetRecTriggerTracks(); | |
939 | recTriggerTracks = fMUONData->RecTriggerTracks(); | |
940 | ||
941 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
942 | while (track) { | |
943 | track->MatchTriggerTrack(recTriggerTracks); | |
944 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
945 | } | |
946 | ||
947 | } | |
948 | ||
949 | //__________________________________________________________________________ | |
950 | Bool_t AliMUONTrackReconstructor::MakeTriggerTracks(void) | |
951 | { | |
952 | // To make the trigger tracks from Local Trigger | |
953 | AliDebug(1, "Enter MakeTriggerTracks"); | |
954 | ||
955 | Int_t nTRentries; | |
956 | Long_t gloTrigPat; | |
957 | TClonesArray *localTrigger; | |
958 | TClonesArray *globalTrigger; | |
959 | AliMUONLocalTrigger *locTrg; | |
960 | AliMUONGlobalTrigger *gloTrg; | |
961 | AliMUONTriggerCircuit *circuit; | |
962 | AliMUONTriggerTrack *recTriggerTrack = 0; | |
963 | ||
964 | TTree* treeR = fLoader->TreeR(); | |
965 | ||
966 | // Loading MUON subsystem | |
967 | AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON"); | |
968 | ||
969 | nTRentries = Int_t(treeR->GetEntries()); | |
970 | ||
971 | treeR->GetEvent(0); // only one entry | |
972 | ||
973 | if (!(fMUONData->IsTriggerBranchesInTree())) { | |
974 | AliWarning(Form("Trigger information is not avalaible, nTRentries = %d not equal to 1",nTRentries)); | |
975 | return kFALSE; | |
976 | } | |
977 | ||
978 | fMUONData->SetTreeAddress("TC"); | |
979 | fMUONData->GetTrigger(); | |
980 | ||
981 | // global trigger for trigger pattern | |
982 | gloTrigPat = 0; | |
983 | globalTrigger = fMUONData->GlobalTrigger(); | |
984 | gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0); | |
985 | if (gloTrg) { | |
986 | if (gloTrg->SinglePlusLpt()) gloTrigPat|= 0x1; | |
987 | if (gloTrg->SinglePlusHpt()) gloTrigPat|= 0x2; | |
988 | if (gloTrg->SinglePlusApt()) gloTrigPat|= 0x4; | |
989 | ||
990 | if (gloTrg->SingleMinusLpt()) gloTrigPat|= 0x8; | |
991 | if (gloTrg->SingleMinusHpt()) gloTrigPat|= 0x10; | |
992 | if (gloTrg->SingleMinusApt()) gloTrigPat|= 0x20; | |
993 | ||
994 | if (gloTrg->SingleUndefLpt()) gloTrigPat|= 0x40; | |
995 | if (gloTrg->SingleUndefHpt()) gloTrigPat|= 0x80; | |
996 | if (gloTrg->SingleUndefApt()) gloTrigPat|= 0x100; | |
997 | ||
998 | if (gloTrg->PairUnlikeLpt()) gloTrigPat|= 0x200; | |
999 | if (gloTrg->PairUnlikeHpt()) gloTrigPat|= 0x400; | |
1000 | if (gloTrg->PairUnlikeApt()) gloTrigPat|= 0x800; | |
1001 | ||
1002 | if (gloTrg->PairLikeLpt()) gloTrigPat|= 0x1000; | |
1003 | if (gloTrg->PairLikeHpt()) gloTrigPat|= 0x2000; | |
1004 | if (gloTrg->PairLikeApt()) gloTrigPat|= 0x4000; | |
1005 | } | |
1006 | ||
1007 | // local trigger for tracking | |
1008 | localTrigger = fMUONData->LocalTrigger(); | |
1009 | Int_t nlocals = (Int_t) (localTrigger->GetEntries()); | |
1010 | ||
1011 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); | |
1012 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
1013 | ||
1014 | for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger | |
1015 | locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i); | |
1016 | circuit = &(pMUON->TriggerCircuit(locTrg->LoCircuit())); | |
1017 | Float_t y11 = circuit->GetY11Pos(locTrg->LoStripX()); | |
1018 | Int_t stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1; | |
1019 | Float_t y21 = circuit->GetY21Pos(stripX21); | |
1020 | Float_t x11 = circuit->GetX11Pos(locTrg->LoStripY()); | |
1021 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
1022 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
1023 | ||
1024 | recTriggerTrack = new AliMUONTriggerTrack(x11,y11,thetax,thetay,gloTrigPat); | |
1025 | ||
1026 | // since static statement does not work, set gloTrigPat for each track | |
1027 | ||
1028 | fMUONData->AddRecTriggerTrack(*recTriggerTrack); | |
1029 | delete recTriggerTrack; | |
1030 | } // end of loop on Local Trigger | |
1031 | return kTRUE; | |
1032 | } | |
1033 | ||
1034 | //__________________________________________________________________________ | |
1035 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) | |
1036 | { | |
1037 | // To make track candidates with two segments in stations(1..) 4 and 5, | |
1038 | // the first segment being pointed to by "BegSegment". | |
1039 | // Returns the number of such track candidates. | |
1040 | Int_t endStation, iEndSegment, nbCan2Seg; | |
1041 | AliMUONSegment *endSegment; | |
1042 | AliMUONSegment *extrapSegment = NULL; | |
1043 | AliMUONTrack *recTrack; | |
1044 | Double_t mcsFactor; | |
1045 | AliDebug(1,"Enter MakeTrackCandidatesWithTwoSegments"); | |
1046 | // Station for the end segment | |
1047 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
1048 | // multiple scattering factor corresponding to one chamber | |
1049 | mcsFactor = 0.0136 / | |
1050 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
1051 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1052 | // linear extrapolation to end station | |
1053 | // number of candidates with 2 segments to 0 | |
1054 | nbCan2Seg = 0; | |
1055 | // Loop over segments in the end station | |
1056 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { | |
1057 | // pointer to segment | |
1058 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); | |
1059 | // test compatibility between current segment and "extrapSegment" | |
1060 | // 4 because 4 quantities in chi2 | |
1061 | extrapSegment = | |
1062 | BegSegment->CreateSegmentFromLinearExtrapToStation(endSegment->GetZ(), mcsFactor); | |
1063 | if ((endSegment-> | |
1064 | NormalizedChi2WithSegment(extrapSegment, | |
1065 | fMaxSigma2Distance)) <= 4.0) { | |
1066 | // both segments compatible: | |
1067 | // make track candidate from "begSegment" and "endSegment" | |
1068 | AliDebug(2,Form("TrackCandidate with Segment %d in Station(0..) %d", iEndSegment, endStation)); | |
1069 | // flag for both segments in one track: | |
1070 | // to be done in track constructor ???? | |
1071 | BegSegment->SetInTrack(kTRUE); | |
1072 | endSegment->SetInTrack(kTRUE); | |
1073 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
1074 | AliMUONTrack(BegSegment, endSegment, this); | |
1075 | fNRecTracks++; | |
1076 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); | |
1077 | // increment number of track candidates with 2 segments | |
1078 | nbCan2Seg++; | |
1079 | } | |
1080 | delete extrapSegment; // should not delete HitForRec's it points to !!!! | |
1081 | } // for (iEndSegment = 0;... | |
1082 | return nbCan2Seg; | |
1083 | } | |
1084 | ||
1085 | //__________________________________________________________________________ | |
1086 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) | |
1087 | { | |
1088 | // To make track candidates with one segment and one point | |
1089 | // in stations(1..) 4 and 5, | |
1090 | // the segment being pointed to by "BegSegment". | |
1091 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; | |
1092 | AliMUONHitForRec *extrapHitForRec= NULL; | |
1093 | AliMUONHitForRec *hit; | |
1094 | AliMUONTrack *recTrack; | |
1095 | Double_t mcsFactor; | |
1096 | AliDebug(1,"Enter MakeTrackCandidatesWithOneSegmentAndOnePoint"); | |
1097 | // station for the end point | |
1098 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
1099 | // multiple scattering factor corresponding to one chamber | |
1100 | mcsFactor = 0.0136 / | |
1101 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
1102 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1103 | // first and second chambers(0..) in the end station | |
1104 | ch1 = 2 * endStation; | |
1105 | ch2 = ch1 + 1; | |
1106 | // number of candidates to 0 | |
1107 | nbCan1Seg1Hit = 0; | |
1108 | // Loop over chambers of the end station | |
1109 | for (ch = ch2; ch >= ch1; ch--) { | |
1110 | // limits for the hit index in the loop | |
1111 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; | |
1112 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; | |
1113 | // Loop over HitForRec's in the chamber | |
1114 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { | |
1115 | // pointer to HitForRec | |
1116 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
1117 | // test compatibility between current HitForRec and "extrapHitForRec" | |
1118 | // 2 because 2 quantities in chi2 | |
1119 | // linear extrapolation to chamber | |
1120 | extrapHitForRec = | |
1121 | BegSegment->CreateHitForRecFromLinearExtrapToChamber( hit->GetZ(), mcsFactor); | |
1122 | if ((hit-> | |
1123 | NormalizedChi2WithHitForRec(extrapHitForRec, | |
1124 | fMaxSigma2Distance)) <= 2.0) { | |
1125 | // both HitForRec's compatible: | |
1126 | // make track candidate from begSegment and current HitForRec | |
1127 | AliDebug(2, Form("TrackCandidate with HitForRec %d in Chamber(0..) %d", iHit, ch)); | |
1128 | // flag for beginning segments in one track: | |
1129 | // to be done in track constructor ???? | |
1130 | BegSegment->SetInTrack(kTRUE); | |
1131 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
1132 | AliMUONTrack(BegSegment, hit, this); | |
1133 | // the right place to eliminate "double counting" ???? how ???? | |
1134 | fNRecTracks++; | |
1135 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); | |
1136 | // increment number of track candidates | |
1137 | nbCan1Seg1Hit++; | |
1138 | } | |
1139 | delete extrapHitForRec; | |
1140 | } // for (iHit = iHitMin;... | |
1141 | } // for (ch = ch2;... | |
1142 | return nbCan1Seg1Hit; | |
1143 | } | |
1144 | ||
1145 | //__________________________________________________________________________ | |
1146 | void AliMUONTrackReconstructor::MakeTrackCandidates(void) | |
1147 | { | |
1148 | // To make track candidates | |
1149 | // with at least 3 aligned points in stations(1..) 4 and 5 | |
1150 | // (two Segment's or one Segment and one HitForRec) | |
1151 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; | |
1152 | AliMUONSegment *begSegment; | |
1153 | AliDebug(1,"Enter MakeTrackCandidates"); | |
1154 | // Loop over stations(1..) 5 and 4 for the beginning segment | |
1155 | for (begStation = 4; begStation > 2; begStation--) { | |
1156 | // Loop over segments in the beginning station | |
1157 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { | |
1158 | // pointer to segment | |
1159 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); | |
1160 | AliDebug(2,Form("Look for TrackCandidate's with Segment %d in Station(0..) %d", iBegSegment, begStation)); | |
1161 | // Look for track candidates with two segments, | |
1162 | // "begSegment" and all compatible segments in other station. | |
1163 | // Only for beginning station(1..) 5 | |
1164 | // because candidates with 2 segments have to looked for only once. | |
1165 | if (begStation == 4) | |
1166 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); | |
1167 | // Look for track candidates with one segment and one point, | |
1168 | // "begSegment" and all compatible HitForRec's in other station. | |
1169 | // Only if "begSegment" does not belong already to a track candidate. | |
1170 | // Is that a too strong condition ???? | |
1171 | if (!(begSegment->GetInTrack())) | |
1172 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); | |
1173 | } // for (iBegSegment = 0;... | |
1174 | } // for (begStation = 4;... | |
1175 | return; | |
1176 | } | |
1177 | ||
1178 | //__________________________________________________________________________ | |
1179 | void AliMUONTrackReconstructor::FollowTracks(void) | |
1180 | { | |
1181 | // Follow tracks in stations(1..) 3, 2 and 1 | |
1182 | // too long: should be made more modular !!!! | |
1183 | AliMUONHitForRec *bestHit, *extrapHit, *hit; | |
1184 | AliMUONSegment *bestSegment, *extrapSegment, *segment; | |
1185 | AliMUONTrack *track, *nextTrack; | |
1186 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; | |
1187 | // -1 to avoid compilation warnings | |
1188 | Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex; | |
1189 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; | |
1190 | Double_t bendingMomentum, chi2Norm = 0.; | |
1191 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
1192 | // local maxSigma2Distance, for easy increase in testing | |
1193 | maxSigma2Distance = fMaxSigma2Distance; | |
1194 | AliDebug(2,"Enter FollowTracks"); | |
1195 | // Loop over track candidates | |
1196 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1197 | trackIndex = -1; | |
1198 | while (track) { | |
1199 | // Follow function for each track candidate ???? | |
1200 | trackIndex++; | |
1201 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track | |
1202 | AliDebug(2,Form("FollowTracks: track candidate(0..): %d", trackIndex)); | |
1203 | // Fit track candidate | |
1204 | track->SetFitMCS(0); // without multiple Coulomb scattering | |
1205 | track->SetFitNParam(3); // with 3 parameters (X = Y = 0) | |
1206 | track->SetFitStart(0); // from parameters at vertex | |
1207 | track->Fit(); | |
1208 | if (AliLog::GetGlobalDebugLevel()> 2) { | |
1209 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1210 | << " after fit in stations(0..) 3 and 4" << endl; | |
1211 | track->RecursiveDump(); | |
1212 | } | |
1213 | // Loop over stations(1..) 3, 2 and 1 | |
1214 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? | |
1215 | // otherwise: majority coincidence 2 !!!! | |
1216 | for (station = 2; station >= 0; station--) { | |
1217 | // Track parameters at first track hit (smallest Z) | |
1218 | trackParam1 = ((AliMUONTrackHit*) | |
1219 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1220 | // extrapolation to station | |
1221 | trackParam1->ExtrapToStation(station, trackParam); | |
1222 | extrapSegment = new AliMUONSegment(); // empty segment | |
1223 | // multiple scattering factor corresponding to one chamber | |
1224 | // and momentum in bending plane (not total) | |
1225 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); | |
1226 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1227 | // Z difference from previous station | |
1228 | dZ1 = (&(pMUON->Chamber(2 * station)))->Z() - | |
1229 | (&(pMUON->Chamber(2 * station + 2)))->Z(); | |
1230 | // Z difference between the two previous stations | |
1231 | dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() - | |
1232 | (&(pMUON->Chamber(2 * station + 4)))->Z(); | |
1233 | // Z difference between the two chambers in the previous station | |
1234 | dZ3 = (&(pMUON->Chamber(2 * station)))->Z() - | |
1235 | (&(pMUON->Chamber(2 * station + 1)))->Z(); | |
1236 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1237 | extrapSegment-> | |
1238 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1239 | extrapSegment->UpdateFromStationTrackParam | |
1240 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1241 | trackParam1->GetInverseBendingMomentum()); | |
1242 | bestChi2 = 5.0; | |
1243 | bestSegment = NULL; | |
1244 | if (AliLog::GetGlobalDebugLevel() > 2) { | |
1245 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1246 | << " Look for segment in station(0..): " << station << endl; | |
1247 | } | |
1248 | // Loop over segments in station | |
1249 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { | |
1250 | // Look for best compatible Segment in station | |
1251 | // should consider all possibilities ???? | |
1252 | // multiple scattering ???? | |
1253 | // separation in 2 functions: Segment and HitForRec ???? | |
1254 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); | |
1255 | // correction of corrected segment (fBendingCoor and fNonBendingCoor) | |
1256 | // according to real Z value of "segment" and slopes of "extrapSegment" | |
1257 | (&(trackParam[0]))->ExtrapToZ(segment->GetZ()); | |
1258 | (&(trackParam[1]))->ExtrapToZ(segment->GetZ()); | |
1259 | extrapSegment->SetBendingCoor((&(trackParam[0]))->GetBendingCoor()); | |
1260 | extrapSegment->SetNonBendingCoor((&(trackParam[0]))->GetNonBendingCoor()); | |
1261 | extrapSegment->SetBendingSlope((&(trackParam[0]))->GetBendingSlope()); | |
1262 | extrapSegment->SetNonBendingSlope((&(trackParam[0]))->GetNonBendingSlope()); | |
1263 | chi2 = segment-> | |
1264 | NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance); | |
1265 | if (chi2 < bestChi2) { | |
1266 | // update best Chi2 and Segment if better found | |
1267 | bestSegment = segment; | |
1268 | bestChi2 = chi2; | |
1269 | } | |
1270 | } | |
1271 | if (bestSegment) { | |
1272 | // best segment found: add it to track candidate | |
1273 | (&(trackParam[0]))->ExtrapToZ(bestSegment->GetZ()); | |
1274 | (&(trackParam[1]))->ExtrapToZ(bestSegment->GetZ()); | |
1275 | track->AddSegment(bestSegment); | |
1276 | // set track parameters at these two TrakHit's | |
1277 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); | |
1278 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); | |
1279 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Added segment in station(0..): %d", trackIndex, station)); | |
1280 | if (AliLog::GetGlobalDebugLevel()>2) track->RecursiveDump(); | |
1281 | } | |
1282 | else { | |
1283 | // No best segment found: | |
1284 | // Look for best compatible HitForRec in station: | |
1285 | // should consider all possibilities ???? | |
1286 | // multiple scattering ???? do about like for extrapSegment !!!! | |
1287 | extrapHit = new AliMUONHitForRec(); // empty hit | |
1288 | bestChi2 = 3.0; | |
1289 | bestHit = NULL; | |
1290 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Segment not found, look for hit in station(0..): %d ", | |
1291 | trackIndex, station)); | |
1292 | ||
1293 | // Loop over chambers of the station | |
1294 | for (chInStation = 0; chInStation < 2; chInStation++) { | |
1295 | ch = 2 * station + chInStation; | |
1296 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; | |
1297 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + | |
1298 | fNHitsForRecPerChamber[ch]; | |
1299 | iHit++) { | |
1300 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
1301 | // coordinates of extrapolated hit | |
1302 | (&(trackParam[chInStation]))->ExtrapToZ(hit->GetZ()); | |
1303 | extrapHit-> | |
1304 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1305 | extrapHit-> | |
1306 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
1307 | // resolutions from "extrapSegment" | |
1308 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1309 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
1310 | // Loop over hits in the chamber | |
1311 | // condition for hit not already in segment ???? | |
1312 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); | |
1313 | if (chi2 < bestChi2) { | |
1314 | // update best Chi2 and HitForRec if better found | |
1315 | bestHit = hit; | |
1316 | bestChi2 = chi2; | |
1317 | chBestHit = chInStation; | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | if (bestHit) { | |
1322 | // best hit found: add it to track candidate | |
1323 | (&(trackParam[chBestHit]))->ExtrapToZ(bestHit->GetZ()); | |
1324 | track->AddHitForRec(bestHit); | |
1325 | // set track parameters at this TrackHit | |
1326 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, | |
1327 | &(trackParam[chBestHit])); | |
1328 | if (AliLog::GetGlobalDebugLevel() > 2) { | |
1329 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1330 | << " Added hit in station(0..): " << station << endl; | |
1331 | track->RecursiveDump(); | |
1332 | } | |
1333 | } | |
1334 | else { | |
1335 | // Remove current track candidate | |
1336 | // and corresponding TrackHit's, ... | |
1337 | track->Remove(); | |
1338 | delete extrapSegment; | |
1339 | delete extrapHit; | |
1340 | break; // stop the search for this candidate: | |
1341 | // exit from the loop over station | |
1342 | } | |
1343 | delete extrapHit; | |
1344 | } | |
1345 | delete extrapSegment; | |
1346 | // Sort track hits according to increasing Z | |
1347 | track->GetTrackHitsPtr()->Sort(); | |
1348 | // Update track parameters at first track hit (smallest Z) | |
1349 | trackParam1 = ((AliMUONTrackHit*) | |
1350 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1351 | bendingMomentum = 0.; | |
1352 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.) | |
1353 | bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum())); | |
1354 | // Track removed if bendingMomentum not in window [min, max] | |
1355 | if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) { | |
1356 | track->Remove(); | |
1357 | break; // stop the search for this candidate: | |
1358 | // exit from the loop over station | |
1359 | } | |
1360 | // Track fit | |
1361 | // with multiple Coulomb scattering if all stations | |
1362 | if (station == 0) track->SetFitMCS(1); | |
1363 | // without multiple Coulomb scattering if not all stations | |
1364 | else track->SetFitMCS(0); | |
1365 | track->SetFitNParam(5); // with 5 parameters (momentum and position) | |
1366 | track->SetFitStart(1); // from parameters at first hit | |
1367 | track->Fit(); | |
1368 | Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5); | |
1369 | if (numberOfDegFree > 0) { | |
1370 | chi2Norm = track->GetFitFMin() / numberOfDegFree; | |
1371 | } else { | |
1372 | chi2Norm = 1.e10; | |
1373 | } | |
1374 | // Track removed if normalized chi2 too high | |
1375 | if (chi2Norm > fMaxChi2) { | |
1376 | track->Remove(); | |
1377 | break; // stop the search for this candidate: | |
1378 | // exit from the loop over station | |
1379 | } | |
1380 | if (AliLog::GetGlobalDebugLevel() > 2) { | |
1381 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1382 | << " after fit from station(0..): " << station << " to 4" << endl; | |
1383 | track->RecursiveDump(); | |
1384 | } | |
1385 | // Track extrapolation to the vertex through the absorber (Branson) | |
1386 | // after going through the first station | |
1387 | if (station == 0) { | |
1388 | trackParamVertex = *trackParam1; | |
1389 | (&trackParamVertex)->ExtrapToVertex(0.,0.,0.); | |
1390 | track->SetTrackParamAtVertex(&trackParamVertex); | |
1391 | if (AliLog::GetGlobalDebugLevel() > 0) { | |
1392 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1393 | << " after extrapolation to vertex" << endl; | |
1394 | track->RecursiveDump(); | |
1395 | } | |
1396 | } | |
1397 | } // for (station = 2;... | |
1398 | // go really to next track | |
1399 | track = nextTrack; | |
1400 | } // while (track) | |
1401 | // Compression of track array (necessary after Remove ????) | |
1402 | fRecTracksPtr->Compress(); | |
1403 | return; | |
1404 | } | |
1405 | ||
1406 | //__________________________________________________________________________ | |
1407 | void AliMUONTrackReconstructor::RemoveDoubleTracks(void) | |
1408 | { | |
1409 | // To remove double tracks. | |
1410 | // Tracks are considered identical | |
1411 | // if they have at least half of their hits in common. | |
1412 | // Among two identical tracks, one keeps the track with the larger number of hits | |
1413 | // or, if these numbers are equal, the track with the minimum Chi2. | |
1414 | AliMUONTrack *track1, *track2, *trackToRemove; | |
1415 | Bool_t identicalTracks; | |
1416 | Int_t hitsInCommon, nHits1, nHits2; | |
1417 | identicalTracks = kTRUE; | |
1418 | while (identicalTracks) { | |
1419 | identicalTracks = kFALSE; | |
1420 | // Loop over first track of the pair | |
1421 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
1422 | while (track1 && (!identicalTracks)) { | |
1423 | nHits1 = track1->GetNTrackHits(); | |
1424 | // Loop over second track of the pair | |
1425 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1426 | while (track2 && (!identicalTracks)) { | |
1427 | nHits2 = track2->GetNTrackHits(); | |
1428 | // number of hits in common between two tracks | |
1429 | hitsInCommon = track1->HitsInCommon(track2); | |
1430 | // check for identical tracks | |
1431 | if ((4 * hitsInCommon) >= (nHits1 + nHits2)) { | |
1432 | identicalTracks = kTRUE; | |
1433 | // decide which track to remove | |
1434 | if (nHits1 > nHits2) trackToRemove = track2; | |
1435 | else if (nHits1 < nHits2) trackToRemove = track1; | |
1436 | else if ((track1->GetFitFMin()) < (track2->GetFitFMin())) | |
1437 | trackToRemove = track2; | |
1438 | else trackToRemove = track1; | |
1439 | // remove it | |
1440 | trackToRemove->Remove(); | |
1441 | } | |
1442 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
1443 | } // track2 | |
1444 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1445 | } // track1 | |
1446 | } | |
1447 | return; | |
1448 | } | |
1449 | ||
1450 | //__________________________________________________________________________ | |
1451 | void AliMUONTrackReconstructor::UpdateTrackParamAtHit() | |
1452 | { | |
1453 | // Set track parameters after track fitting. Fill fTrackParamAtHit of AliMUONTrack's | |
1454 | AliMUONTrack *track; | |
1455 | AliMUONTrackHit *trackHit; | |
1456 | AliMUONTrackParam *trackParam; | |
1457 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1458 | while (track) { | |
1459 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); | |
1460 | while (trackHit) { | |
1461 | trackParam = trackHit->GetTrackParam(); | |
1462 | track->AddTrackParamAtHit(trackParam); | |
1463 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); | |
1464 | } // trackHit | |
1465 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1466 | } // track | |
1467 | return; | |
1468 | } | |
1469 | ||
1470 | //__________________________________________________________________________ | |
1471 | void AliMUONTrackReconstructor::UpdateHitForRecAtHit() | |
1472 | { | |
1473 | // Set cluster parameterss after track fitting. Fill fHitForRecAtHit of AliMUONTrack's | |
1474 | AliMUONTrack *track; | |
1475 | AliMUONTrackHit *trackHit; | |
1476 | AliMUONHitForRec *hitForRec; | |
1477 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1478 | while (track) { | |
1479 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); | |
1480 | while (trackHit) { | |
1481 | hitForRec = trackHit->GetHitForRecPtr(); | |
1482 | track->AddHitForRecAtHit(hitForRec); | |
1483 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); | |
1484 | } // trackHit | |
1485 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1486 | } // track | |
1487 | return; | |
1488 | } | |
1489 | ||
1490 | //__________________________________________________________________________ | |
1491 | void AliMUONTrackReconstructor::FillMUONTrack() | |
1492 | { | |
1493 | // Set track parameters at hits for Kalman track. Fill fTrackParamAtHit of AliMUONTrack's | |
1494 | AliMUONTrackK *track; | |
1495 | track = (AliMUONTrackK*) fRecTracksPtr->First(); | |
1496 | while (track) { | |
1497 | track->FillMUONTrack(); | |
1498 | track = (AliMUONTrackK*) fRecTracksPtr->After(track); | |
1499 | } | |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | //__________________________________________________________________________ | |
1504 | void AliMUONTrackReconstructor::EventDump(void) | |
1505 | { | |
1506 | // Dump reconstructed event (track parameters at vertex and at first hit), | |
1507 | // and the particle parameters | |
1508 | ||
1509 | AliMUONTrack *track; | |
1510 | AliMUONTrackParam *trackParam, *trackParam1; | |
1511 | Double_t bendingSlope, nonBendingSlope, pYZ; | |
1512 | Double_t pX, pY, pZ, x, y, z, c; | |
1513 | Int_t np, trackIndex, nTrackHits; | |
1514 | ||
1515 | AliDebug(1,"****** enter EventDump ******"); | |
1516 | AliDebug(1, Form("Number of Reconstructed tracks : %d", fNRecTracks)); | |
1517 | ||
1518 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole | |
1519 | // Loop over reconstructed tracks | |
1520 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { | |
1521 | if (fTrackMethod != 1) continue; //AZ - skip the rest for now | |
1522 | AliDebug(1, Form("track number: %d", trackIndex)); | |
1523 | // function for each track for modularity ???? | |
1524 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); | |
1525 | nTrackHits = track->GetNTrackHits(); | |
1526 | AliDebug(1, Form("Number of track hits: %d ", nTrackHits)); | |
1527 | // track parameters at Vertex | |
1528 | trackParam = track->GetTrackParamAtVertex(); | |
1529 | x = trackParam->GetNonBendingCoor(); | |
1530 | y = trackParam->GetBendingCoor(); | |
1531 | z = trackParam->GetZ(); | |
1532 | bendingSlope = trackParam->GetBendingSlope(); | |
1533 | nonBendingSlope = trackParam->GetNonBendingSlope(); | |
1534 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); | |
1535 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); | |
1536 | pX = pZ * nonBendingSlope; | |
1537 | pY = pZ * bendingSlope; | |
1538 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); | |
1539 | AliDebug(1, Form("Track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1540 | z, x, y, pX, pY, pZ, c)); | |
1541 | ||
1542 | // track parameters at first hit | |
1543 | trackParam1 = ((AliMUONTrackHit*) | |
1544 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1545 | x = trackParam1->GetNonBendingCoor(); | |
1546 | y = trackParam1->GetBendingCoor(); | |
1547 | z = trackParam1->GetZ(); | |
1548 | bendingSlope = trackParam1->GetBendingSlope(); | |
1549 | nonBendingSlope = trackParam1->GetNonBendingSlope(); | |
1550 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); | |
1551 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); | |
1552 | pX = pZ * nonBendingSlope; | |
1553 | pY = pZ * bendingSlope; | |
1554 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); | |
1555 | AliDebug(1, Form("track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1556 | z, x, y, pX, pY, pZ, c)); | |
1557 | } | |
1558 | // informations about generated particles | |
1559 | np = gAlice->GetMCApp()->GetNtrack(); | |
1560 | printf(" **** number of generated particles: %d \n", np); | |
1561 | ||
1562 | // for (Int_t iPart = 0; iPart < np; iPart++) { | |
1563 | // p = gAlice->Particle(iPart); | |
1564 | // printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", | |
1565 | // iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); | |
1566 | // } | |
1567 | return; | |
1568 | } | |
1569 | ||
1570 | ||
1571 | //__________________________________________________________________________ | |
1572 | void AliMUONTrackReconstructor::EventDumpTrigger(void) | |
1573 | { | |
1574 | // Dump reconstructed trigger event | |
1575 | // and the particle parameters | |
1576 | ||
1577 | AliMUONTriggerTrack *triggertrack ; | |
1578 | Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast(); | |
1579 | ||
1580 | AliDebug(1, "****** enter EventDumpTrigger ******"); | |
1581 | AliDebug(1, Form("Number of Reconstructed tracks : %d ", nTriggerTracks)); | |
1582 | ||
1583 | // Loop over reconstructed tracks | |
1584 | for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) { | |
1585 | triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex); | |
1586 | printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n", | |
1587 | trackIndex, | |
1588 | triggertrack->GetX11(),triggertrack->GetY11(), | |
1589 | triggertrack->GetThetax(),triggertrack->GetThetay()); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | //__________________________________________________________________________ | |
1594 | void AliMUONTrackReconstructor::MakeTrackCandidatesK(void) | |
1595 | { | |
1596 | // To make initial tracks for Kalman filter from the list of segments | |
1597 | Int_t istat, iseg; | |
1598 | AliMUONSegment *segment; | |
1599 | AliMUONTrackK *trackK; | |
1600 | ||
1601 | AliDebug(1,"Enter MakeTrackCandidatesK"); | |
1602 | // Reset the TClonesArray of reconstructed tracks | |
1603 | if (fRecTracksPtr) fRecTracksPtr->Delete(); | |
1604 | // Delete in order that the Track destructors are called, | |
1605 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
1606 | fNRecTracks = 0; | |
1607 | ||
1608 | AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ??? | |
1609 | // Loop over stations(1...) 5 and 4 | |
1610 | for (istat=4; istat>=3; istat--) { | |
1611 | // Loop over segments in the station | |
1612 | for (iseg=0; iseg<fNSegments[istat]; iseg++) { | |
1613 | // Transform segments to tracks and evaluate covariance matrix | |
1614 | segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]); | |
1615 | trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment); | |
1616 | fNRecTracks++; | |
1617 | } // for (iseg=0;...) | |
1618 | } // for (istat=4;...) | |
1619 | return; | |
1620 | } | |
1621 | ||
1622 | //__________________________________________________________________________ | |
1623 | void AliMUONTrackReconstructor::FollowTracksK(void) | |
1624 | { | |
1625 | // Follow tracks using Kalman filter | |
1626 | Bool_t ok; | |
1627 | Int_t icand, ichamBeg = 0, ichamEnd, chamBits; | |
1628 | Double_t zDipole1, zDipole2; | |
1629 | AliMUONTrackK *trackK; | |
1630 | AliMUONHitForRec *hit; | |
1631 | AliMUONRawCluster *clus; | |
1632 | TClonesArray *rawclusters; | |
1633 | clus = 0; rawclusters = 0; | |
1634 | ||
1635 | //AZ(z->-z) zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2; | |
1636 | //AZ(z->-z) zDipole2 = zDipole1 + GetSimpleBLength(); | |
1637 | zDipole1 = GetSimpleBPosition() + GetSimpleBLength()/2; | |
1638 | zDipole2 = zDipole1 - GetSimpleBLength(); | |
1639 | ||
1640 | // Print hits | |
1641 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[0]); | |
1642 | if (trackK->DebugLevel() > 0) { | |
1643 | for (Int_t i1=0; i1<fNHitsForRec; i1++) { | |
1644 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]); | |
1645 | //if (hit->GetTTRTrack() > 1 || hit->GetTrackRefSignal() == 0) continue; | |
1646 | printf(" Hit # %d %10.4f %10.4f %10.4f", | |
1647 | hit->GetChamberNumber(), hit->GetBendingCoor(), | |
1648 | hit->GetNonBendingCoor(), hit->GetZ()); | |
1649 | if (fRecTrackRefHits) { | |
1650 | // from track ref hits | |
1651 | printf(" %3d %3d \n", hit->GetTrackRefSignal(), hit->GetTTRTrack()); | |
1652 | } else { | |
1653 | // from raw clusters | |
1654 | rawclusters = fMUONData->RawClusters(hit->GetChamberNumber()); | |
1655 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit-> | |
1656 | GetHitNumber()); | |
1657 | printf("%3d", clus->GetTrack(1)-1); | |
1658 | if (clus->GetTrack(2) != 0) printf("%3d \n", clus->GetTrack(2)-1); | |
1659 | else printf("\n"); | |
1660 | } // if (fRecTrackRefHits) | |
1661 | } | |
1662 | } // if (trackK->DebugLevel() > 0) | |
1663 | ||
1664 | icand = -1; | |
1665 | Int_t nSeeds; | |
1666 | nSeeds = fNRecTracks; // starting number of seeds | |
1667 | // Loop over track candidates | |
1668 | while (icand < fNRecTracks-1) { | |
1669 | icand ++; | |
1670 | if (trackK->DebugLevel()>0) cout << " *** Kalman track candidate No. " << icand << endl; | |
1671 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1672 | if (trackK->GetRecover() < 0) continue; // failed track | |
1673 | ||
1674 | // Discard candidate which will produce the double track | |
1675 | /* | |
1676 | if (icand > 0) { | |
1677 | ok = CheckCandidateK(icand,nSeeds); | |
1678 | if (!ok) { | |
1679 | trackK->SetRecover(-1); // mark candidate to be removed | |
1680 | continue; | |
1681 | } | |
1682 | } | |
1683 | */ | |
1684 | ||
1685 | ok = kTRUE; | |
1686 | if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*) | |
1687 | trackK->GetHitOnTrack()->Last(); // last hit | |
1688 | //else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit | |
1689 | else hit = trackK->GetHitLastOk(); // hit where track stopped | |
1690 | if (hit) ichamBeg = hit->GetChamberNumber(); | |
1691 | ichamEnd = 0; | |
1692 | // Check propagation direction | |
1693 | if (hit == NULL) ichamBeg = ichamEnd; | |
1694 | //AZ(z->-z) else if (trackK->GetTrackDir() > 0) { | |
1695 | else if (trackK->GetTrackDir() < 0) { | |
1696 | ichamEnd = 9; // forward propagation | |
1697 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1698 | if (ok) { | |
1699 | ichamBeg = ichamEnd; | |
1700 | ichamEnd = 6; // backward propagation | |
1701 | // Change weight matrix and zero fChi2 for backpropagation | |
1702 | trackK->StartBack(); | |
1703 | //AZ trackK->SetTrackDir(-1); | |
1704 | trackK->SetTrackDir(1); | |
1705 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1706 | ichamBeg = ichamEnd; | |
1707 | ichamEnd = 0; | |
1708 | } | |
1709 | } else { | |
1710 | if (trackK->GetBPFlag()) { | |
1711 | // backpropagation | |
1712 | ichamEnd = 6; // backward propagation | |
1713 | // Change weight matrix and zero fChi2 for backpropagation | |
1714 | trackK->StartBack(); | |
1715 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1716 | ichamBeg = ichamEnd; | |
1717 | ichamEnd = 0; | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | if (ok) { | |
1722 | //AZ trackK->SetTrackDir(-1); | |
1723 | trackK->SetTrackDir(1); | |
1724 | trackK->SetBPFlag(kFALSE); | |
1725 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1726 | } | |
1727 | if (!ok) { trackK->SetRecover(-1); continue; } // mark candidate to be removed | |
1728 | ||
1729 | // Apply smoother | |
1730 | if (trackK->GetRecover() >= 0) { | |
1731 | ok = trackK->Smooth(); | |
1732 | if (!ok) trackK->SetRecover(-1); // mark candidate to be removed | |
1733 | } | |
1734 | ||
1735 | // Majority 3 of 4 in first 2 stations | |
1736 | if (!ok) continue; | |
1737 | chamBits = 0; | |
1738 | Double_t chi2_max = 0; | |
1739 | for (Int_t i=0; i<trackK->GetNTrackHits(); i++) { | |
1740 | hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i]; | |
1741 | chamBits |= BIT(hit->GetChamberNumber()); | |
1742 | if (trackK->GetChi2PerPoint(i) > chi2_max) chi2_max = trackK->GetChi2PerPoint(i); | |
1743 | } | |
1744 | if (!((chamBits&3)==3 || (chamBits>>2&3)==3) && chi2_max > 25) { | |
1745 | //trackK->Recover(); | |
1746 | trackK->SetRecover(-1); //mark candidate to be removed | |
1747 | continue; | |
1748 | } | |
1749 | if (ok) trackK->SetTrackQuality(0); // compute "track quality" | |
1750 | } // while | |
1751 | ||
1752 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1753 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1754 | if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i); | |
1755 | } | |
1756 | ||
1757 | // Compress TClonesArray | |
1758 | fRecTracksPtr->Compress(); | |
1759 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1760 | return; | |
1761 | } | |
1762 | ||
1763 | //__________________________________________________________________________ | |
1764 | Bool_t AliMUONTrackReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) const | |
1765 | { | |
1766 | // Discards track candidate if it will produce the double track (having | |
1767 | // the same seed segment hits as hits of a good track found before) | |
1768 | AliMUONTrackK *track1, *track2; | |
1769 | AliMUONHitForRec *hit1, *hit2, *hit; | |
1770 | ||
1771 | track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1772 | hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit | |
1773 | hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit | |
1774 | ||
1775 | for (Int_t i=0; i<icand; i++) { | |
1776 | track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1777 | //if (track2->GetRecover() < 0) continue; | |
1778 | if (track2->GetRecover() < 0 && icand >= nSeeds) continue; | |
1779 | ||
1780 | if (track1->GetStartSegment() == track2->GetStartSegment()) { | |
1781 | return kFALSE; | |
1782 | } else { | |
1783 | Int_t nSame = 0; | |
1784 | for (Int_t j=0; j<track2->GetNTrackHits(); j++) { | |
1785 | hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j]; | |
1786 | if (hit == hit1 || hit == hit2) { | |
1787 | nSame++; | |
1788 | if (nSame == 2) return kFALSE; | |
1789 | } | |
1790 | } // for (Int_t j=0; | |
1791 | } | |
1792 | } // for (Int_t i=0; | |
1793 | return kTRUE; | |
1794 | } | |
1795 | ||
1796 | //__________________________________________________________________________ | |
1797 | void AliMUONTrackReconstructor::RemoveDoubleTracksK(void) | |
1798 | { | |
1799 | // Removes double tracks (sharing more than half of their hits). Keeps | |
1800 | // the track with higher quality | |
1801 | AliMUONTrackK *track1, *track2, *trackToKill; | |
1802 | ||
1803 | // Sort tracks according to their quality | |
1804 | fRecTracksPtr->Sort(); | |
1805 | ||
1806 | // Loop over first track of the pair | |
1807 | track1 = (AliMUONTrackK*) fRecTracksPtr->First(); | |
1808 | Int_t debug = track1->DebugLevel(); | |
1809 | while (track1) { | |
1810 | // Loop over second track of the pair | |
1811 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1812 | while (track2) { | |
1813 | // Check whether or not to keep track2 | |
1814 | if (!track2->KeepTrack(track1)) { | |
1815 | if (debug >= 0) cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) << | |
1816 | " " << track2->GetTrackQuality() << endl; | |
1817 | trackToKill = track2; | |
1818 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1819 | trackToKill->Kill(); | |
1820 | fRecTracksPtr->Compress(); | |
1821 | } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1822 | } // track2 | |
1823 | track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1824 | } // track1 | |
1825 | ||
1826 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1827 | if (debug >= 0) cout << " Number of Kalman tracks: " << fNRecTracks << endl; | |
1828 | } | |
1829 | ||
1830 | //__________________________________________________________________________ | |
1831 | void AliMUONTrackReconstructor::GoToVertex(void) | |
1832 | { | |
1833 | // Propagates track to the vertex thru absorber | |
1834 | // (using Branson correction for now) | |
1835 | ||
1836 | Double_t zVertex; | |
1837 | zVertex = 0; | |
1838 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1839 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson(); | |
1840 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2 | |
1841 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber | |
1842 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(1); // with absorber | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | //__________________________________________________________________________ | |
1847 | void AliMUONTrackReconstructor::SetTrackMethod(Int_t iTrackMethod) | |
1848 | { | |
1849 | // Set track method and recreate track container if necessary | |
1850 | ||
1851 | fTrackMethod = iTrackMethod == 2 ? 2 : 1; | |
1852 | if (fTrackMethod == 2) { | |
1853 | if (fRecTracksPtr) delete fRecTracksPtr; | |
1854 | fRecTracksPtr = new TClonesArray("AliMUONTrackK", 10); | |
1855 | cout << " *** Tracking with the Kalman filter *** " << endl; | |
1856 | } else cout << " *** Traditional tracking *** " << endl; | |
1857 | ||
1858 | } |