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a9e2aefa | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
3831f268 | 18 | //////////////////////////////////// |
a9e2aefa | 19 | // |
20 | // MUON event reconstructor in ALICE | |
21 | // | |
22 | // This class contains as data: | |
23 | // * the parameters for the event 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 | |
3831f268 | 32 | // |
33 | //////////////////////////////////// | |
a9e2aefa | 34 | |
70479d0e | 35 | #include <Riostream.h> // for cout |
82a4bc7b | 36 | #include <stdlib.h> // for exit() |
a9e2aefa | 37 | |
94de3818 | 38 | #include <TTree.h> |
a9e2aefa | 39 | |
a9e2aefa | 40 | #include "AliMUON.h" |
3831f268 | 41 | #include "AliMUONChamber.h" |
42 | #include "AliMUONEventReconstructor.h" | |
a9e2aefa | 43 | #include "AliMUONHitForRec.h" |
a9e2aefa | 44 | #include "AliMUONRawCluster.h" |
3831f268 | 45 | #include "AliMUONRecoEvent.h" |
46 | #include "AliMUONSegment.h" | |
a9e2aefa | 47 | #include "AliMUONTrack.h" |
a9e2aefa | 48 | #include "AliMUONTrackHit.h" |
94de3818 | 49 | #include "AliMagF.h" |
3831f268 | 50 | #include "AliRun.h" // for gAlice |
88cb7938 | 51 | #include "AliConfig.h" |
52 | #include "AliRunLoader.h" | |
53 | #include "AliLoader.h" | |
83dbc640 | 54 | #include "AliMUONTrackK.h" //AZ |
55 | #include <TMatrixD.h> //AZ | |
a9e2aefa | 56 | |
a9e2aefa | 57 | //************* Defaults parameters for reconstruction |
9cbdf048 | 58 | static const Double_t kDefaultMinBendingMomentum = 3.0; |
d0bfce8d | 59 | static const Double_t kDefaultMaxBendingMomentum = 500.0; |
60 | static const Double_t kDefaultMaxChi2 = 100.0; | |
9cbdf048 | 61 | static const Double_t kDefaultMaxSigma2Distance = 16.0; |
62 | static const Double_t kDefaultBendingResolution = 0.01; | |
63 | static const Double_t kDefaultNonBendingResolution = 0.144; | |
64 | static const Double_t kDefaultChamberThicknessInX0 = 0.03; | |
a9e2aefa | 65 | // Simple magnetic field: |
66 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG | |
67 | // Length and Position from reco_muon.F, with opposite sign: | |
68 | // Length = ZMAGEND-ZCOIL | |
69 | // Position = (ZMAGEND+ZCOIL)/2 | |
70 | // to be ajusted differently from real magnetic field ???? | |
9cbdf048 | 71 | static const Double_t kDefaultSimpleBValue = 7.0; |
72 | static const Double_t kDefaultSimpleBLength = 428.0; | |
73 | static const Double_t kDefaultSimpleBPosition = 1019.0; | |
74 | static const Int_t kDefaultRecGeantHits = 0; | |
75 | static const Double_t kDefaultEfficiency = 0.95; | |
a9e2aefa | 76 | |
9cbdf048 | 77 | static const Int_t kDefaultPrintLevel = 0; |
a9e2aefa | 78 | |
79 | ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context | |
80 | ||
81 | //__________________________________________________________________________ | |
82 | AliMUONEventReconstructor::AliMUONEventReconstructor(void) | |
83 | { | |
84 | // Constructor for class AliMUONEventReconstructor | |
85 | SetReconstructionParametersToDefaults(); | |
83dbc640 | 86 | fTrackMethod = 1; //AZ - tracking method (1-default, 2-Kalman) |
a9e2aefa | 87 | // Memory allocation for the TClonesArray of hits for reconstruction |
88 | // Is 10000 the right size ???? | |
89 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
90 | fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ???? | |
91 | // Memory allocation for the TClonesArray's of segments in stations | |
92 | // Is 2000 the right size ???? | |
9cbdf048 | 93 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 94 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); |
95 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
96 | } | |
97 | // Memory allocation for the TClonesArray of reconstructed tracks | |
98 | // Is 10 the right size ???? | |
99 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
100 | fNRecTracks = 0; // really needed or GetEntriesFast sufficient ???? | |
8429a5e4 | 101 | // Memory allocation for the TClonesArray of hits on reconstructed tracks |
102 | // Is 100 the right size ???? | |
103 | fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100); | |
104 | fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ???? | |
a9e2aefa | 105 | |
065bd0e1 | 106 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,950). |
a6f03ddb | 107 | Float_t b[3], x[3]; |
108 | x[0] = 50.; x[1] = 50.; x[2] = 950.; | |
109 | gAlice->Field()->Field(x, b); | |
065bd0e1 | 110 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); |
a6f03ddb | 111 | // See how to get fSimple(BValue, BLength, BPosition) |
112 | // automatically calculated from the actual magnetic field ???? | |
a9e2aefa | 113 | |
114 | if (fPrintLevel >= 0) { | |
a6f03ddb | 115 | cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump(); |
116 | cout << endl << "Magnetic field from root file:" << endl; | |
117 | gAlice->Field()->Dump(); | |
118 | cout << endl; | |
119 | } | |
c7ba256d | 120 | |
47a6b602 | 121 | // Initializions for GEANT background events |
122 | fBkgGeantFile = 0; | |
123 | fBkgGeantTK = 0; | |
124 | fBkgGeantParticles = 0; | |
125 | fBkgGeantTH = 0; | |
126 | fBkgGeantHits = 0; | |
127 | fBkgGeantEventNumber = -1; | |
128 | ||
c7ba256d | 129 | // Initialize to 0 pointers to RecoEvent, tree and tree file |
130 | fRecoEvent = 0; | |
131 | fEventTree = 0; | |
132 | fTreeFile = 0; | |
133 | ||
a9e2aefa | 134 | return; |
135 | } | |
136 | ||
d9a3473d | 137 | AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor):TObject(Reconstructor) |
9cbdf048 | 138 | { |
139 | // Dummy copy constructor | |
140 | } | |
141 | ||
d9a3473d | 142 | AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& /*Reconstructor*/) |
9cbdf048 | 143 | { |
144 | // Dummy assignment operator | |
145 | return *this; | |
146 | } | |
147 | ||
a9e2aefa | 148 | //__________________________________________________________________________ |
149 | AliMUONEventReconstructor::~AliMUONEventReconstructor(void) | |
150 | { | |
151 | // Destructor for class AliMUONEventReconstructor | |
c7ba256d | 152 | if (fTreeFile) { |
153 | fTreeFile->Close(); | |
154 | delete fTreeFile; | |
155 | } | |
156 | // if (fEventTree) delete fEventTree; | |
157 | if (fRecoEvent) delete fRecoEvent; | |
a9e2aefa | 158 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? |
9cbdf048 | 159 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 160 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? |
161 | return; | |
162 | } | |
163 | ||
164 | //__________________________________________________________________________ | |
165 | void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void) | |
166 | { | |
167 | // Set reconstruction parameters to default values | |
168 | // Would be much more convenient with a structure (or class) ???? | |
9cbdf048 | 169 | fMinBendingMomentum = kDefaultMinBendingMomentum; |
d0bfce8d | 170 | fMaxBendingMomentum = kDefaultMaxBendingMomentum; |
171 | fMaxChi2 = kDefaultMaxChi2; | |
9cbdf048 | 172 | fMaxSigma2Distance = kDefaultMaxSigma2Distance; |
a9e2aefa | 173 | |
9cbdf048 | 174 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); |
a9e2aefa | 175 | // ******** Parameters for making HitsForRec |
176 | // minimum radius, | |
177 | // like in TRACKF_STAT: | |
178 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; | |
179 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 | |
9cbdf048 | 180 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
181 | if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) * | |
a9e2aefa | 182 | 2.0 * TMath::Pi() / 180.0; |
183 | else fRMin[ch] = 30.0; | |
d0bfce8d | 184 | // maximum radius at 10 degrees and Z of chamber |
185 | fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) * | |
186 | 10.0 * TMath::Pi() / 180.0; | |
a9e2aefa | 187 | } |
a9e2aefa | 188 | |
189 | // ******** Parameters for making segments | |
190 | // should be parametrized ???? | |
191 | // according to interval between chambers in a station ???? | |
192 | // Maximum distance in non bending plane | |
193 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
194 | // SIGCUT*DYMAX(IZ) | |
9cbdf048 | 195 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 196 | fSegmentMaxDistNonBending[st] = 5. * 0.22; |
860cef81 | 197 | // Maximum distance in bending plane: |
198 | // values from TRACKF_STAT, corresponding to (J psi 20cm), | |
199 | // scaled to the real distance between chambers in a station | |
ef21c79e | 200 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * |
201 | ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0); | |
202 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * | |
203 | ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0); | |
204 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * | |
205 | ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0); | |
206 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * | |
207 | ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0); | |
208 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * | |
209 | ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0); | |
a9e2aefa | 210 | |
9cbdf048 | 211 | fBendingResolution = kDefaultBendingResolution; |
212 | fNonBendingResolution = kDefaultNonBendingResolution; | |
213 | fChamberThicknessInX0 = kDefaultChamberThicknessInX0; | |
214 | fSimpleBValue = kDefaultSimpleBValue; | |
215 | fSimpleBLength = kDefaultSimpleBLength; | |
216 | fSimpleBPosition = kDefaultSimpleBPosition; | |
217 | fRecGeantHits = kDefaultRecGeantHits; | |
218 | fEfficiency = kDefaultEfficiency; | |
219 | fPrintLevel = kDefaultPrintLevel; | |
a9e2aefa | 220 | return; |
221 | } | |
222 | ||
223 | //__________________________________________________________________________ | |
3831f268 | 224 | Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const |
a9e2aefa | 225 | { |
226 | // Returns impact parameter at vertex in bending plane (cm), | |
227 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
228 | // using simple values for dipole magnetic field. | |
065bd0e1 | 229 | // The sign of "BendingMomentum" is the sign of the charge. |
a9e2aefa | 230 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
231 | BendingMomentum); | |
232 | } | |
233 | ||
234 | //__________________________________________________________________________ | |
3831f268 | 235 | Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const |
a9e2aefa | 236 | { |
237 | // Returns signed bending momentum in bending plane (GeV/c), | |
065bd0e1 | 238 | // the sign being the sign of the charge for particles moving forward in Z, |
a9e2aefa | 239 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), |
240 | // using simple values for dipole magnetic field. | |
a9e2aefa | 241 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
242 | ImpactParam); | |
243 | } | |
244 | ||
245 | //__________________________________________________________________________ | |
246 | void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName) | |
247 | { | |
248 | // Set background file ... for GEANT hits | |
249 | // Must be called after having loaded the firts signal event | |
250 | if (fPrintLevel >= 0) { | |
251 | cout << "Enter SetBkgGeantFile with BkgGeantFileName ``" | |
252 | << BkgGeantFileName << "''" << endl;} | |
253 | if (strlen(BkgGeantFileName)) { | |
254 | // BkgGeantFileName not empty: try to open the file | |
255 | if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();} | |
256 | fBkgGeantFile = new TFile(BkgGeantFileName); | |
257 | if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();} | |
258 | if (fBkgGeantFile-> IsOpen()) { | |
259 | if (fPrintLevel >= 0) { | |
260 | cout << "Background for GEANT hits in file: ``" << BkgGeantFileName | |
261 | << "'' successfully opened" << endl;} | |
262 | } | |
263 | else { | |
264 | cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl; | |
265 | cout << "NOT FOUND: EXIT" << endl; | |
266 | exit(0); // right instruction for exit ???? | |
267 | } | |
268 | // Arrays for "particles" and "hits" | |
269 | fBkgGeantParticles = new TClonesArray("TParticle", 200); | |
270 | fBkgGeantHits = new TClonesArray("AliMUONHit", 2000); | |
271 | // Event number to -1 for initialization | |
272 | fBkgGeantEventNumber = -1; | |
273 | // Back to the signal file: | |
274 | // first signal event must have been loaded previously, | |
275 | // otherwise, Segmentation violation at the next instruction | |
276 | // How is it possible to do smething better ???? | |
277 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
278 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
279 | } | |
280 | return; | |
281 | } | |
282 | ||
283 | //__________________________________________________________________________ | |
284 | void AliMUONEventReconstructor::NextBkgGeantEvent(void) | |
285 | { | |
286 | // Get next event in background file for GEANT hits | |
287 | // Goes back to event number 0 when end of file is reached | |
288 | char treeName[20]; | |
289 | TBranch *branch; | |
290 | if (fPrintLevel >= 0) { | |
291 | cout << "Enter NextBkgGeantEvent" << endl;} | |
292 | // Clean previous event | |
293 | if(fBkgGeantTK) delete fBkgGeantTK; | |
294 | fBkgGeantTK = NULL; | |
295 | if(fBkgGeantParticles) fBkgGeantParticles->Clear(); | |
296 | if(fBkgGeantTH) delete fBkgGeantTH; | |
297 | fBkgGeantTH = NULL; | |
298 | if(fBkgGeantHits) fBkgGeantHits->Clear(); | |
299 | // Increment event number | |
300 | fBkgGeantEventNumber++; | |
301 | // Get access to Particles and Hits for event from background file | |
302 | if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();} | |
303 | fBkgGeantFile->cd(); | |
304 | if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();} | |
305 | // Particles: TreeK for event and branch "Particles" | |
306 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
307 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
308 | if (!fBkgGeantTK) { | |
309 | if (fPrintLevel >= 0) { | |
310 | cout << "Cannot find Kine Tree for background event: " << | |
311 | fBkgGeantEventNumber << endl; | |
312 | cout << "Goes back to event 0" << endl; | |
313 | } | |
314 | fBkgGeantEventNumber = 0; | |
315 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
316 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
317 | if (!fBkgGeantTK) { | |
318 | cout << "ERROR: cannot find Kine Tree for background event: " << | |
319 | fBkgGeantEventNumber << endl; | |
320 | exit(0); | |
321 | } | |
322 | } | |
323 | if (fBkgGeantTK) | |
324 | fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles); | |
325 | fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ???? | |
326 | // Hits: TreeH for event and branch "MUON" | |
327 | sprintf(treeName, "TreeH%d", fBkgGeantEventNumber); | |
328 | fBkgGeantTH = (TTree*)gDirectory->Get(treeName); | |
329 | if (!fBkgGeantTH) { | |
330 | cout << "ERROR: cannot find Hits Tree for background event: " << | |
331 | fBkgGeantEventNumber << endl; | |
332 | exit(0); | |
333 | } | |
334 | if (fBkgGeantTH && fBkgGeantHits) { | |
335 | branch = fBkgGeantTH->GetBranch("MUON"); | |
336 | if (branch) branch->SetAddress(&fBkgGeantHits); | |
337 | } | |
338 | fBkgGeantTH->GetEntries(); // necessary ???? | |
339 | // Back to the signal file | |
340 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
341 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
342 | return; | |
343 | } | |
344 | ||
345 | //__________________________________________________________________________ | |
346 | void AliMUONEventReconstructor::EventReconstruct(void) | |
347 | { | |
348 | // To reconstruct one event | |
349 | if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl; | |
350 | MakeEventToBeReconstructed(); | |
351 | MakeSegments(); | |
352 | MakeTracks(); | |
353 | return; | |
354 | } | |
355 | ||
356 | //__________________________________________________________________________ | |
357 | void AliMUONEventReconstructor::ResetHitsForRec(void) | |
358 | { | |
359 | // To reset the array and the number of HitsForRec, | |
360 | // and also the number of HitsForRec | |
361 | // and the index of the first HitForRec per chamber | |
362 | if (fHitsForRecPtr) fHitsForRecPtr->Clear(); | |
363 | fNHitsForRec = 0; | |
9cbdf048 | 364 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) |
a9e2aefa | 365 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; |
366 | return; | |
367 | } | |
368 | ||
369 | //__________________________________________________________________________ | |
370 | void AliMUONEventReconstructor::ResetSegments(void) | |
371 | { | |
372 | // To reset the TClonesArray of segments and the number of Segments | |
373 | // for all stations | |
9cbdf048 | 374 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 375 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); |
376 | fNSegments[st] = 0; | |
377 | } | |
378 | return; | |
379 | } | |
380 | ||
381 | //__________________________________________________________________________ | |
382 | void AliMUONEventReconstructor::ResetTracks(void) | |
383 | { | |
384 | // To reset the TClonesArray of reconstructed tracks | |
8429a5e4 | 385 | if (fRecTracksPtr) fRecTracksPtr->Delete(); |
386 | // Delete in order that the Track destructors are called, | |
387 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
a9e2aefa | 388 | fNRecTracks = 0; |
389 | return; | |
390 | } | |
391 | ||
8429a5e4 | 392 | //__________________________________________________________________________ |
393 | void AliMUONEventReconstructor::ResetTrackHits(void) | |
394 | { | |
395 | // To reset the TClonesArray of hits on reconstructed tracks | |
396 | if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear(); | |
397 | fNRecTrackHits = 0; | |
398 | return; | |
399 | } | |
400 | ||
a9e2aefa | 401 | //__________________________________________________________________________ |
402 | void AliMUONEventReconstructor::MakeEventToBeReconstructed(void) | |
403 | { | |
404 | // To make the list of hits to be reconstructed, | |
405 | // either from the GEANT hits or from the raw clusters | |
406 | // according to the parameter set for the reconstructor | |
88cb7938 | 407 | TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly |
408 | ||
409 | AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname); | |
410 | if (rl == 0x0) | |
411 | { | |
412 | Error("MakeEventToBeReconstructed", | |
413 | "Can not find Run Loader in Event Folder named %s.", | |
414 | evfoldname.Data()); | |
415 | return; | |
416 | } | |
417 | AliLoader* gime = rl->GetLoader("MUONLoader"); | |
418 | if (gime == 0x0) | |
419 | { | |
420 | Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader."); | |
421 | return; | |
422 | } | |
423 | ||
a9e2aefa | 424 | if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl; |
425 | ResetHitsForRec(); | |
426 | if (fRecGeantHits == 1) { | |
427 | // Reconstruction from GEANT hits | |
428 | // Back to the signal file | |
88cb7938 | 429 | TTree* treeH = gime->TreeH(); |
430 | if (treeH == 0x0) | |
431 | { | |
432 | Int_t retval = gime->LoadHits(); | |
433 | if ( retval) | |
434 | { | |
435 | Error("MakeEventToBeReconstructed","Error occured while loading hits."); | |
436 | return; | |
437 | } | |
438 | treeH = gime->TreeH(); | |
439 | if (treeH == 0x0) | |
440 | { | |
441 | Error("MakeEventToBeReconstructed","Can not get TreeH"); | |
442 | return; | |
443 | } | |
444 | } | |
445 | ||
446 | AddHitsForRecFromGEANT(treeH); | |
447 | ||
a9e2aefa | 448 | // Background hits |
449 | AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits); | |
450 | // Sort HitsForRec in increasing order with respect to chamber number | |
451 | SortHitsForRecWithIncreasingChamber(); | |
452 | } | |
453 | else { | |
454 | // Reconstruction from raw clusters | |
455 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
456 | // Security on MUON ???? | |
457 | // TreeR assumed to be be "prepared" in calling function | |
458 | // by "MUON->GetTreeR(nev)" ???? | |
88cb7938 | 459 | TTree *treeR = gime->TreeR(); |
9cbdf048 | 460 | AddHitsForRecFromRawClusters(treeR); |
a9e2aefa | 461 | // No sorting: it is done automatically in the previous function |
462 | } | |
463 | if (fPrintLevel >= 10) { | |
464 | cout << "end of MakeEventToBeReconstructed" << endl; | |
465 | cout << "NHitsForRec: " << fNHitsForRec << endl; | |
9cbdf048 | 466 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 467 | cout << "chamber(0...): " << ch |
468 | << " NHitsForRec: " << fNHitsForRecPerChamber[ch] | |
469 | << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch] | |
470 | << endl; | |
471 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
472 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
473 | hit++) { | |
474 | cout << "HitForRec index(0...): " << hit << endl; | |
475 | ((*fHitsForRecPtr)[hit])->Dump(); | |
476 | } | |
477 | } | |
478 | } | |
479 | return; | |
480 | } | |
481 | ||
482 | //__________________________________________________________________________ | |
483 | void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH) | |
484 | { | |
485 | // To add to the list of hits for reconstruction | |
486 | // the GEANT signal hits from a hit tree TH. | |
83dbc640 | 487 | Int_t hitBits, chamBits; //AZ |
a9e2aefa | 488 | if (fPrintLevel >= 2) |
489 | cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl; | |
490 | if (TH == NULL) return; | |
9cbdf048 | 491 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
38302c61 | 492 | AliMUONData * muondata = pMUON->GetMUONData(); |
a9e2aefa | 493 | // Security on MUON ???? |
494 | // See whether it could be the same for signal and background ???? | |
495 | // Loop over tracks in tree | |
496 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
497 | if (fPrintLevel >= 2) | |
498 | cout << "ntracks: " << ntracks << endl; | |
83dbc640 | 499 | fMuons = 0; //AZ |
a9e2aefa | 500 | for (Int_t track = 0; track < ntracks; track++) { |
38302c61 | 501 | muondata->ResetHits(); |
a9e2aefa | 502 | TH->GetEvent(track); |
503 | // Loop over hits | |
504 | Int_t hit = 0; | |
83dbc640 | 505 | hitBits = 0; // AZ |
506 | chamBits = 0; // AZ | |
507 | Int_t itrack = track; //AZ | |
38302c61 | 508 | |
509 | Int_t ihit, nhits=0; | |
510 | nhits = (Int_t) muondata->Hits()->GetEntriesFast(); | |
511 | AliMUONHit* mHit=0x0; | |
1391e633 | 512 | |
38302c61 | 513 | for(ihit=0; ihit<nhits; ihit++) { |
514 | mHit = static_cast<AliMUONHit*>(muondata->Hits()->At(ihit)); | |
515 | Int_t ipart = TMath::Abs ((Int_t) mHit->Particle()); //AZ | |
516 | if (NewHitForRecFromGEANT(mHit,track, hit, 1) && ipart == 13 | |
517 | //if (NewHitForRecFromGEANT(mHit,itrack-1, hit, 1) && ipart == 13 | |
1391e633 | 518 | && itrack <= 2 && !BIT(mHit->Chamber()-1) ) chamBits |= BIT(mHit->Chamber()-1); //AZ - set bit |
38302c61 | 519 | } |
1391e633 | 520 | |
83dbc640 | 521 | if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 && |
522 | chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3)) | |
523 | fMuons += 1; //AZ | |
524 | //if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 && | |
525 | // chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3) && | |
526 | // ((chamBits&3)==3 || (chamBits>>2&3)==3)) fMuons += 1; | |
a9e2aefa | 527 | } // end of track loop |
528 | return; | |
529 | } | |
530 | ||
531 | //__________________________________________________________________________ | |
532 | void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits) | |
533 | { | |
534 | // To add to the list of hits for reconstruction | |
535 | // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list. | |
536 | // How to have only one function "AddHitsForRecFromGEANT" ???? | |
537 | if (fPrintLevel >= 2) | |
538 | cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl; | |
539 | if (TH == NULL) return; | |
540 | // Loop over tracks in tree | |
541 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
542 | if (fPrintLevel >= 2) | |
543 | cout << "ntracks: " << ntracks << endl; | |
544 | for (Int_t track = 0; track < ntracks; track++) { | |
545 | if (Hits) Hits->Clear(); | |
546 | TH->GetEvent(track); | |
547 | // Loop over hits | |
548 | for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) { | |
549 | NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0); | |
550 | } // end of hit loop | |
551 | } // end of track loop | |
552 | return; | |
553 | } | |
554 | ||
555 | //__________________________________________________________________________ | |
556 | AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal) | |
557 | { | |
558 | // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit", | |
559 | // with hit number "HitNumber" in the track numbered "TrackNumber", | |
560 | // either from signal ("Signal" = 1) or background ("Signal" = 0) event. | |
561 | // Selects hits in tracking (not trigger) chambers. | |
562 | // Takes into account the efficiency (fEfficiency) | |
563 | // and the smearing from resolution (fBendingResolution and fNonBendingResolution). | |
564 | // Adds a condition on the radius between RMin and RMax | |
565 | // to better simulate the real chambers. | |
566 | // Returns the pointer to the new hit for reconstruction, | |
567 | // or NULL in case of inefficiency or non tracking chamber or bad radius. | |
568 | // No condition on at most 20 cm from a muon from a resonance | |
569 | // like in Fortran TRACKF_STAT. | |
570 | AliMUONHitForRec* hitForRec; | |
571 | Double_t bendCoor, nonBendCoor, radius; | |
0a5f36d9 | 572 | Int_t chamber = Hit->Chamber() - 1; // chamber(0...) |
a9e2aefa | 573 | // only in tracking chambers (fChamber starts at 1) |
9cbdf048 | 574 | if (chamber >= kMaxMuonTrackingChambers) return NULL; |
a9e2aefa | 575 | // only if hit is efficient (keep track for checking ????) |
576 | if (gRandom->Rndm() > fEfficiency) return NULL; | |
577 | // only if radius between RMin and RMax | |
94de3818 | 578 | bendCoor = Hit->Y(); |
579 | nonBendCoor = Hit->X(); | |
a9e2aefa | 580 | radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor)); |
d0bfce8d | 581 | // This cut is not needed with a realistic chamber geometry !!!! |
582 | // if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL; | |
a9e2aefa | 583 | // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's |
584 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit); | |
585 | fNHitsForRec++; | |
586 | // add smearing from resolution | |
587 | hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution)); | |
588 | hitForRec->SetNonBendingCoor(nonBendCoor | |
589 | + gRandom->Gaus(0., fNonBendingResolution)); | |
d0bfce8d | 590 | // // !!!! without smearing |
591 | // hitForRec->SetBendingCoor(bendCoor); | |
592 | // hitForRec->SetNonBendingCoor(nonBendCoor); | |
a9e2aefa | 593 | // more information into HitForRec |
594 | // resolution: angular effect to be added here ???? | |
595 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
596 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
597 | // GEANT track info | |
598 | hitForRec->SetHitNumber(HitNumber); | |
599 | hitForRec->SetTHTrack(TrackNumber); | |
600 | hitForRec->SetGeantSignal(Signal); | |
601 | if (fPrintLevel >= 10) { | |
602 | cout << "track: " << TrackNumber << " hit: " << HitNumber << endl; | |
603 | Hit->Dump(); | |
604 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
605 | hitForRec->Dump();} | |
606 | return hitForRec; | |
607 | } | |
608 | ||
609 | //__________________________________________________________________________ | |
610 | void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber() | |
611 | { | |
612 | // Sort HitsForRec's in increasing order with respect to chamber number. | |
613 | // Uses the function "Compare". | |
614 | // Update the information for HitsForRec per chamber too. | |
615 | Int_t ch, nhits, prevch; | |
616 | fHitsForRecPtr->Sort(); | |
9cbdf048 | 617 | for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 618 | fNHitsForRecPerChamber[ch] = 0; |
619 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
620 | } | |
621 | prevch = 0; // previous chamber | |
622 | nhits = 0; // number of hits in current chamber | |
623 | // Loop over HitsForRec | |
624 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
625 | // chamber number (0...) | |
626 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
627 | // increment number of hits in current chamber | |
628 | (fNHitsForRecPerChamber[ch])++; | |
629 | // update index of first HitForRec in current chamber | |
630 | // if chamber number different from previous one | |
631 | if (ch != prevch) { | |
632 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
633 | prevch = ch; | |
634 | } | |
635 | } | |
636 | return; | |
637 | } | |
638 | ||
639 | // //__________________________________________________________________________ | |
640 | // void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC) | |
641 | // { | |
642 | // // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS | |
643 | // // To add to the list of hits for reconstruction | |
644 | // // the (cathode correlated) raw clusters | |
645 | // // No condition added, like in Fortran TRACKF_STAT, | |
646 | // // on the radius between RMin and RMax. | |
647 | // AliMUONHitForRec *hitForRec; | |
648 | // if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl; | |
649 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
650 | // // Security on MUON ???? | |
651 | // // Loop over tracking chambers | |
9cbdf048 | 652 | // for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 653 | // // number of HitsForRec to 0 for the chamber |
654 | // fNHitsForRecPerChamber[ch] = 0; | |
655 | // // index of first HitForRec for the chamber | |
656 | // if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
657 | // else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
658 | // TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch); | |
659 | // MUON->ResetReconstHits(); | |
660 | // TC->GetEvent(); | |
661 | // Int_t ncor = (Int_t)reconst_hits->GetEntries(); | |
662 | // // Loop over (cathode correlated) raw clusters | |
663 | // for (Int_t cor = 0; cor < ncor; cor++) { | |
664 | // AliMUONReconstHit * mCor = | |
665 | // (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor); | |
666 | // // new AliMUONHitForRec from (cathode correlated) raw cluster | |
667 | // // and increment number of AliMUONHitForRec's (total and in chamber) | |
668 | // hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor); | |
669 | // fNHitsForRec++; | |
670 | // (fNHitsForRecPerChamber[ch])++; | |
671 | // // more information into HitForRec | |
672 | // hitForRec->SetChamberNumber(ch); | |
673 | // hitForRec->SetHitNumber(cor); | |
674 | // // Z coordinate of the chamber (cm) with sign opposite to GEANT sign | |
675 | // // could (should) be more exact from chamber geometry ???? | |
676 | // hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z()); | |
677 | // if (fPrintLevel >= 10) { | |
678 | // cout << "chamber (0...): " << ch << | |
679 | // " cathcorrel (0...): " << cor << endl; | |
680 | // mCor->Dump(); | |
681 | // cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
682 | // hitForRec->Dump();} | |
683 | // } // end of cluster loop | |
684 | // } // end of chamber loop | |
685 | // return; | |
686 | // } | |
687 | ||
688 | //__________________________________________________________________________ | |
689 | void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR) | |
690 | { | |
691 | // To add to the list of hits for reconstruction all the raw clusters | |
692 | // No condition added, like in Fortran TRACKF_STAT, | |
693 | // on the radius between RMin and RMax. | |
694 | AliMUONHitForRec *hitForRec; | |
695 | AliMUONRawCluster *clus; | |
f69d51b5 | 696 | Int_t iclus, nclus, nTRentries; |
a9e2aefa | 697 | TClonesArray *rawclusters; |
698 | if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl; | |
88cb7938 | 699 | |
700 | TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly | |
701 | AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname); | |
702 | if (rl == 0x0) | |
703 | { | |
704 | Error("MakeEventToBeReconstructed", | |
705 | "Can not find Run Loader in Event Folder named %s.", | |
706 | evfoldname.Data()); | |
707 | return; | |
708 | } | |
709 | AliLoader* gime = rl->GetLoader("MUONLoader"); | |
710 | if (gime == 0x0) | |
711 | { | |
712 | Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader."); | |
713 | return; | |
714 | } | |
715 | // Loading AliRun master | |
716 | rl->LoadgAlice(); | |
717 | gAlice = rl->GetAliRun(); | |
718 | ||
719 | // Loading MUON subsystem | |
720 | AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON"); | |
721 | ||
f69d51b5 | 722 | nTRentries = Int_t(TR->GetEntries()); |
723 | if (nTRentries != 1) { | |
724 | cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters" | |
725 | << endl; | |
726 | cout << "nTRentries = " << nTRentries << " not equal to 1" << endl; | |
727 | exit(0); | |
728 | } | |
88cb7938 | 729 | gime->TreeR()->GetEvent(0); // only one entry |
a9e2aefa | 730 | // Loop over tracking chambers |
9cbdf048 | 731 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 732 | // number of HitsForRec to 0 for the chamber |
733 | fNHitsForRecPerChamber[ch] = 0; | |
734 | // index of first HitForRec for the chamber | |
735 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
736 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
ce3f5e87 | 737 | rawclusters = pMUON->GetMUONData()->RawClusters(ch); |
f69d51b5 | 738 | // pMUON->ResetRawClusters(); |
739 | // TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ???? | |
a9e2aefa | 740 | nclus = (Int_t) (rawclusters->GetEntries()); |
741 | // Loop over (cathode correlated) raw clusters | |
742 | for (iclus = 0; iclus < nclus; iclus++) { | |
743 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); | |
744 | // new AliMUONHitForRec from raw cluster | |
745 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
746 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
747 | fNHitsForRec++; | |
748 | (fNHitsForRecPerChamber[ch])++; | |
749 | // more information into HitForRec | |
750 | // resolution: info should be already in raw cluster and taken from it ???? | |
751 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
752 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
753 | // original raw cluster | |
754 | hitForRec->SetChamberNumber(ch); | |
755 | hitForRec->SetHitNumber(iclus); | |
ba5b68db | 756 | // Z coordinate of the raw cluster (cm) |
cfe0107f | 757 | hitForRec->SetZ(clus->fZ[0]); |
a9e2aefa | 758 | if (fPrintLevel >= 10) { |
759 | cout << "chamber (0...): " << ch << | |
760 | " raw cluster (0...): " << iclus << endl; | |
761 | clus->Dump(); | |
762 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
763 | hitForRec->Dump();} | |
764 | } // end of cluster loop | |
765 | } // end of chamber loop | |
83dbc640 | 766 | SortHitsForRecWithIncreasingChamber(); //AZ |
a9e2aefa | 767 | return; |
768 | } | |
769 | ||
770 | //__________________________________________________________________________ | |
771 | void AliMUONEventReconstructor::MakeSegments(void) | |
772 | { | |
773 | // To make the list of segments in all stations, | |
774 | // from the list of hits to be reconstructed | |
775 | if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl; | |
776 | ResetSegments(); | |
777 | // Loop over stations | |
83dbc640 | 778 | Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ |
779 | //AZ for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) | |
780 | for (Int_t st = nb; st < kMaxMuonTrackingStations; st++) //AZ | |
a9e2aefa | 781 | MakeSegmentsPerStation(st); |
782 | if (fPrintLevel >= 10) { | |
783 | cout << "end of MakeSegments" << endl; | |
9cbdf048 | 784 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 785 | cout << "station(0...): " << st |
786 | << " Segments: " << fNSegments[st] | |
787 | << endl; | |
788 | for (Int_t seg = 0; | |
789 | seg < fNSegments[st]; | |
790 | seg++) { | |
791 | cout << "Segment index(0...): " << seg << endl; | |
792 | ((*fSegmentsPtr[st])[seg])->Dump(); | |
793 | } | |
794 | } | |
795 | } | |
796 | return; | |
797 | } | |
798 | ||
799 | //__________________________________________________________________________ | |
800 | void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station) | |
801 | { | |
802 | // To make the list of segments in station number "Station" (0...) | |
803 | // from the list of hits to be reconstructed. | |
804 | // Updates "fNSegments"[Station]. | |
805 | // Segments in stations 4 and 5 are sorted | |
806 | // according to increasing absolute value of "impact parameter" | |
807 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
808 | AliMUONSegment *segment; | |
809 | Bool_t last2st; | |
810 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
d0bfce8d | 811 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. |
9cbdf048 | 812 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
a9e2aefa | 813 | if (fPrintLevel >= 1) |
814 | cout << "enter MakeSegmentsPerStation (0...) " << Station << endl; | |
815 | // first and second chambers (0...) in the station | |
816 | Int_t ch1 = 2 * Station; | |
817 | Int_t ch2 = ch1 + 1; | |
818 | // variable true for stations downstream of the dipole: | |
819 | // Station(0..4) equal to 3 or 4 | |
820 | if ((Station == 3) || (Station == 4)) { | |
821 | last2st = kTRUE; | |
822 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
823 | maxImpactParam = | |
824 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
d0bfce8d | 825 | // minimum impact parameter (cm) according to fMaxBendingMomentum... |
826 | minImpactParam = | |
827 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); | |
a9e2aefa | 828 | } |
829 | else last2st = kFALSE; | |
830 | // extrapolation factor from Z of first chamber to Z of second chamber | |
831 | // dZ to be changed to take into account fine structure of chambers ???? | |
832 | Double_t extrapFact = | |
9cbdf048 | 833 | (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z(); |
a9e2aefa | 834 | // index for current segment |
835 | Int_t segmentIndex = 0; | |
836 | // Loop over HitsForRec in the first chamber of the station | |
837 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
838 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
839 | hit1++) { | |
840 | // pointer to the HitForRec | |
841 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
842 | // extrapolation, | |
843 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
844 | // to the Z of the second chamber of the station | |
845 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
846 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
847 | // Loop over HitsForRec in the second chamber of the station | |
848 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
849 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
850 | hit2++) { | |
851 | // pointer to the HitForRec | |
852 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
853 | // absolute values of distances, in bending and non bending planes, | |
854 | // between the HitForRec in the second chamber | |
855 | // and the previous extrapolation | |
856 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); | |
857 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
858 | if (last2st) { | |
859 | // bending slope | |
860 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
861 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
862 | // absolute value of impact parameter | |
863 | impactParam = | |
31817925 | 864 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); |
a9e2aefa | 865 | } |
866 | // check for distances not too large, | |
867 | // and impact parameter not too big if stations downstream of the dipole. | |
868 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
869 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
870 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
d0bfce8d | 871 | (!last2st || (impactParam < maxImpactParam)) && |
872 | (!last2st || (impactParam > minImpactParam))) { | |
a9e2aefa | 873 | // make new segment |
874 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
875 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
876 | // update "link" to this segment from the hit in the first chamber | |
877 | if (hit1Ptr->GetNSegments() == 0) | |
878 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
879 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
880 | if (fPrintLevel >= 10) { | |
881 | cout << "segmentIndex(0...): " << segmentIndex | |
882 | << " distBend: " << distBend | |
883 | << " distNonBend: " << distNonBend | |
884 | << endl; | |
885 | segment->Dump(); | |
886 | cout << "HitForRec in first chamber" << endl; | |
887 | hit1Ptr->Dump(); | |
888 | cout << "HitForRec in second chamber" << endl; | |
889 | hit2Ptr->Dump(); | |
890 | }; | |
891 | // increment index for current segment | |
892 | segmentIndex++; | |
893 | } | |
894 | } //for (Int_t hit2 | |
895 | } // for (Int_t hit1... | |
896 | fNSegments[Station] = segmentIndex; | |
897 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
898 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
899 | // After this sorting, it is impossible to use | |
900 | // the "fNSegments" and "fIndexOfFirstSegment" | |
901 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
902 | // Is this sorting really needed ???? | |
903 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
904 | if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: " | |
905 | << fNSegments[Station] << endl; | |
906 | return; | |
907 | } | |
908 | ||
909 | //__________________________________________________________________________ | |
910 | void AliMUONEventReconstructor::MakeTracks(void) | |
911 | { | |
912 | // To make the tracks, | |
913 | // from the list of segments and points in all stations | |
914 | if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl; | |
8429a5e4 | 915 | // The order may be important for the following Reset's |
a9e2aefa | 916 | ResetTracks(); |
8429a5e4 | 917 | ResetTrackHits(); |
83dbc640 | 918 | if (fTrackMethod == 2) { //AZ - Kalman filter |
919 | MakeTrackCandidatesK(); | |
920 | // Follow tracks in stations(1..) 3, 2 and 1 | |
921 | FollowTracksK(); | |
922 | // Remove double tracks | |
923 | RemoveDoubleTracksK(); | |
924 | // Propagate tracks to the vertex thru absorber | |
925 | GoToVertex(); | |
926 | } else { //AZ | |
927 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
928 | MakeTrackCandidates(); | |
929 | // Follow tracks in stations(1..) 3, 2 and 1 | |
930 | FollowTracks(); | |
931 | // Remove double tracks | |
932 | RemoveDoubleTracks(); | |
933 | } | |
a9e2aefa | 934 | return; |
935 | } | |
936 | ||
937 | //__________________________________________________________________________ | |
938 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) | |
939 | { | |
940 | // To make track candidates with two segments in stations(1..) 4 and 5, | |
941 | // the first segment being pointed to by "BegSegment". | |
942 | // Returns the number of such track candidates. | |
943 | Int_t endStation, iEndSegment, nbCan2Seg; | |
944 | AliMUONSegment *endSegment, *extrapSegment; | |
945 | AliMUONTrack *recTrack; | |
946 | Double_t mcsFactor; | |
947 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl; | |
948 | // Station for the end segment | |
949 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
950 | // multiple scattering factor corresponding to one chamber | |
951 | mcsFactor = 0.0136 / | |
952 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
953 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
954 | // linear extrapolation to end station | |
955 | extrapSegment = | |
956 | BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor); | |
957 | // number of candidates with 2 segments to 0 | |
958 | nbCan2Seg = 0; | |
959 | // Loop over segments in the end station | |
960 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { | |
961 | // pointer to segment | |
962 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); | |
963 | // test compatibility between current segment and "extrapSegment" | |
04b5ea16 | 964 | // 4 because 4 quantities in chi2 |
a9e2aefa | 965 | if ((endSegment-> |
966 | NormalizedChi2WithSegment(extrapSegment, | |
967 | fMaxSigma2Distance)) <= 4.0) { | |
968 | // both segments compatible: | |
969 | // make track candidate from "begSegment" and "endSegment" | |
970 | if (fPrintLevel >= 2) | |
971 | cout << "TrackCandidate with Segment " << iEndSegment << | |
972 | " in Station(0..) " << endStation << endl; | |
973 | // flag for both segments in one track: | |
974 | // to be done in track constructor ???? | |
975 | BegSegment->SetInTrack(kTRUE); | |
976 | endSegment->SetInTrack(kTRUE); | |
977 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
978 | AliMUONTrack(BegSegment, endSegment, this); | |
979 | fNRecTracks++; | |
980 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
981 | // increment number of track candidates with 2 segments | |
982 | nbCan2Seg++; | |
983 | } | |
984 | } // for (iEndSegment = 0;... | |
985 | delete extrapSegment; // should not delete HitForRec's it points to !!!! | |
986 | return nbCan2Seg; | |
987 | } | |
988 | ||
989 | //__________________________________________________________________________ | |
990 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) | |
991 | { | |
992 | // To make track candidates with one segment and one point | |
993 | // in stations(1..) 4 and 5, | |
994 | // the segment being pointed to by "BegSegment". | |
995 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; | |
996 | AliMUONHitForRec *extrapHitForRec, *hit; | |
997 | AliMUONTrack *recTrack; | |
998 | Double_t mcsFactor; | |
999 | if (fPrintLevel >= 1) | |
1000 | cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl; | |
1001 | // station for the end point | |
1002 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
1003 | // multiple scattering factor corresponding to one chamber | |
1004 | mcsFactor = 0.0136 / | |
1005 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
1006 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1007 | // first and second chambers(0..) in the end station | |
1008 | ch1 = 2 * endStation; | |
1009 | ch2 = ch1 + 1; | |
1010 | // number of candidates to 0 | |
1011 | nbCan1Seg1Hit = 0; | |
1012 | // Loop over chambers of the end station | |
1013 | for (ch = ch2; ch >= ch1; ch--) { | |
1014 | // linear extrapolation to chamber | |
1015 | extrapHitForRec = | |
1016 | BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor); | |
1017 | // limits for the hit index in the loop | |
1018 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; | |
1019 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; | |
1020 | // Loop over HitForRec's in the chamber | |
1021 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { | |
1022 | // pointer to HitForRec | |
1023 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
1024 | // test compatibility between current HitForRec and "extrapHitForRec" | |
04b5ea16 | 1025 | // 2 because 2 quantities in chi2 |
a9e2aefa | 1026 | if ((hit-> |
1027 | NormalizedChi2WithHitForRec(extrapHitForRec, | |
1028 | fMaxSigma2Distance)) <= 2.0) { | |
1029 | // both HitForRec's compatible: | |
1030 | // make track candidate from begSegment and current HitForRec | |
1031 | if (fPrintLevel >= 2) | |
1032 | cout << "TrackCandidate with HitForRec " << iHit << | |
1033 | " in Chamber(0..) " << ch << endl; | |
1034 | // flag for beginning segments in one track: | |
1035 | // to be done in track constructor ???? | |
1036 | BegSegment->SetInTrack(kTRUE); | |
1037 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
1038 | AliMUONTrack(BegSegment, hit, this); | |
1039 | // the right place to eliminate "double counting" ???? how ???? | |
1040 | fNRecTracks++; | |
1041 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
1042 | // increment number of track candidates | |
1043 | nbCan1Seg1Hit++; | |
1044 | } | |
1045 | } // for (iHit = iHitMin;... | |
1046 | delete extrapHitForRec; | |
1047 | } // for (ch = ch2;... | |
1048 | return nbCan1Seg1Hit; | |
1049 | } | |
1050 | ||
1051 | //__________________________________________________________________________ | |
1052 | void AliMUONEventReconstructor::MakeTrackCandidates(void) | |
1053 | { | |
1054 | // To make track candidates | |
1055 | // with at least 3 aligned points in stations(1..) 4 and 5 | |
1056 | // (two Segment's or one Segment and one HitForRec) | |
1057 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; | |
1058 | AliMUONSegment *begSegment; | |
1059 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl; | |
1060 | // Loop over stations(1..) 5 and 4 for the beginning segment | |
1061 | for (begStation = 4; begStation > 2; begStation--) { | |
1062 | // Loop over segments in the beginning station | |
1063 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { | |
1064 | // pointer to segment | |
1065 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); | |
1066 | if (fPrintLevel >= 2) | |
1067 | cout << "look for TrackCandidate's with Segment " << iBegSegment << | |
1068 | " in Station(0..) " << begStation << endl; | |
1069 | // Look for track candidates with two segments, | |
1070 | // "begSegment" and all compatible segments in other station. | |
1071 | // Only for beginning station(1..) 5 | |
1072 | // because candidates with 2 segments have to looked for only once. | |
1073 | if (begStation == 4) | |
1074 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); | |
956019b6 | 1075 | // Look for track candidates with one segment and one point, |
a9e2aefa | 1076 | // "begSegment" and all compatible HitForRec's in other station. |
1077 | // Only if "begSegment" does not belong already to a track candidate. | |
1078 | // Is that a too strong condition ???? | |
1079 | if (!(begSegment->GetInTrack())) | |
1080 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); | |
1081 | } // for (iBegSegment = 0;... | |
1082 | } // for (begStation = 4;... | |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | //__________________________________________________________________________ | |
1087 | void AliMUONEventReconstructor::FollowTracks(void) | |
1088 | { | |
1089 | // Follow tracks in stations(1..) 3, 2 and 1 | |
04b5ea16 | 1090 | // too long: should be made more modular !!!! |
d0bfce8d | 1091 | AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit; |
1092 | AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment; | |
04b5ea16 | 1093 | AliMUONTrack *track, *nextTrack; |
1094 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; | |
ecfa008b | 1095 | // -1 to avoid compilation warnings |
1096 | Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex; | |
04b5ea16 | 1097 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; |
d0bfce8d | 1098 | Double_t bendingMomentum, chi2Norm = 0.; |
9cbdf048 | 1099 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
04b5ea16 | 1100 | // local maxSigma2Distance, for easy increase in testing |
1101 | maxSigma2Distance = fMaxSigma2Distance; | |
a9e2aefa | 1102 | if (fPrintLevel >= 2) |
1103 | cout << "enter FollowTracks" << endl; | |
1104 | // Loop over track candidates | |
04b5ea16 | 1105 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1106 | trackIndex = -1; | |
1107 | while (track) { | |
1108 | // Follow function for each track candidate ???? | |
1109 | trackIndex++; | |
1110 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track | |
a9e2aefa | 1111 | if (fPrintLevel >= 2) |
1112 | cout << "FollowTracks: track candidate(0..): " << trackIndex << endl; | |
956019b6 | 1113 | // Fit track candidate |
1114 | track->SetFitMCS(0); // without multiple Coulomb scattering | |
1115 | track->SetFitNParam(3); // with 3 parameters (X = Y = 0) | |
1116 | track->SetFitStart(0); // from parameters at vertex | |
1117 | track->Fit(); | |
a9e2aefa | 1118 | if (fPrintLevel >= 10) { |
1119 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
956019b6 | 1120 | << " after fit in stations(0..) 3 and 4" << endl; |
a9e2aefa | 1121 | track->RecursiveDump(); |
1122 | } | |
1123 | // Loop over stations(1..) 3, 2 and 1 | |
04b5ea16 | 1124 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? |
1125 | // otherwise: majority coincidence 2 !!!! | |
a9e2aefa | 1126 | for (station = 2; station >= 0; station--) { |
1127 | // Track parameters at first track hit (smallest Z) | |
1128 | trackParam1 = ((AliMUONTrackHit*) | |
1129 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1130 | // extrapolation to station | |
1131 | trackParam1->ExtrapToStation(station, trackParam); | |
79e1e601 | 1132 | extrapSegment = new AliMUONSegment(); // empty segment |
d0bfce8d | 1133 | extrapCorrSegment = new AliMUONSegment(); // empty corrected segment |
a9e2aefa | 1134 | // multiple scattering factor corresponding to one chamber |
1135 | // and momentum in bending plane (not total) | |
1136 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); | |
1137 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1138 | // Z difference from previous station | |
9cbdf048 | 1139 | dZ1 = (&(pMUON->Chamber(2 * station)))->Z() - |
1140 | (&(pMUON->Chamber(2 * station + 2)))->Z(); | |
a9e2aefa | 1141 | // Z difference between the two previous stations |
9cbdf048 | 1142 | dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() - |
1143 | (&(pMUON->Chamber(2 * station + 4)))->Z(); | |
04b5ea16 | 1144 | // Z difference between the two chambers in the previous station |
1145 | dZ3 = (&(pMUON->Chamber(2 * station)))->Z() - | |
1146 | (&(pMUON->Chamber(2 * station + 1)))->Z(); | |
1147 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1148 | extrapSegment-> | |
1149 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1150 | extrapSegment->UpdateFromStationTrackParam | |
1151 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1152 | trackParam1->GetInverseBendingMomentum()); | |
d0bfce8d | 1153 | // same thing for corrected segment |
1154 | // better to use copy constructor, after checking that it works properly !!!! | |
1155 | extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1156 | extrapCorrSegment-> | |
1157 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1158 | extrapCorrSegment->UpdateFromStationTrackParam | |
1159 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1160 | trackParam1->GetInverseBendingMomentum()); | |
a9e2aefa | 1161 | bestChi2 = 5.0; |
1162 | bestSegment = NULL; | |
1163 | if (fPrintLevel >= 10) { | |
1164 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1165 | << " Look for segment in station(0..): " << station << endl; | |
1166 | } | |
1167 | // Loop over segments in station | |
1168 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { | |
1169 | // Look for best compatible Segment in station | |
1170 | // should consider all possibilities ???? | |
1171 | // multiple scattering ???? | |
1172 | // separation in 2 functions: Segment and HitForRec ???? | |
1173 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); | |
d0bfce8d | 1174 | // correction of corrected segment (fBendingCoor and fNonBendingCoor) |
1175 | // according to real Z value of "segment" and slopes of "extrapSegment" | |
1176 | extrapCorrSegment-> | |
1177 | SetBendingCoor(extrapSegment->GetBendingCoor() + | |
1178 | extrapSegment->GetBendingSlope() * | |
1179 | (segment->GetHitForRec1()->GetZ() - | |
1180 | (&(pMUON->Chamber(2 * station)))->Z())); | |
1181 | extrapCorrSegment-> | |
1182 | SetNonBendingCoor(extrapSegment->GetNonBendingCoor() + | |
1183 | extrapSegment->GetNonBendingSlope() * | |
1184 | (segment->GetHitForRec1()->GetZ() - | |
1185 | (&(pMUON->Chamber(2 * station)))->Z())); | |
1186 | chi2 = segment-> | |
1187 | NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance); | |
a9e2aefa | 1188 | if (chi2 < bestChi2) { |
1189 | // update best Chi2 and Segment if better found | |
1190 | bestSegment = segment; | |
1191 | bestChi2 = chi2; | |
1192 | } | |
1193 | } | |
1194 | if (bestSegment) { | |
1195 | // best segment found: add it to track candidate | |
1196 | track->AddSegment(bestSegment); | |
1197 | // set track parameters at these two TrakHit's | |
1198 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); | |
1199 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); | |
1200 | if (fPrintLevel >= 10) { | |
1201 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1202 | << " Added segment in station(0..): " << station << endl; | |
1203 | track->RecursiveDump(); | |
1204 | } | |
1205 | } | |
1206 | else { | |
1207 | // No best segment found: | |
1208 | // Look for best compatible HitForRec in station: | |
1209 | // should consider all possibilities ???? | |
1210 | // multiple scattering ???? do about like for extrapSegment !!!! | |
79e1e601 | 1211 | extrapHit = new AliMUONHitForRec(); // empty hit |
d0bfce8d | 1212 | extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit |
a9e2aefa | 1213 | bestChi2 = 3.0; |
1214 | bestHit = NULL; | |
1215 | if (fPrintLevel >= 10) { | |
1216 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1217 | << " Segment not found, look for hit in station(0..): " << station | |
1218 | << endl; | |
1219 | } | |
1220 | // Loop over chambers of the station | |
d82671a0 | 1221 | for (chInStation = 0; chInStation < 2; chInStation++) { |
a9e2aefa | 1222 | // coordinates of extrapolated hit |
d82671a0 | 1223 | extrapHit-> |
1224 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1225 | extrapHit-> | |
1226 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
a9e2aefa | 1227 | // resolutions from "extrapSegment" |
1228 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1229 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
d0bfce8d | 1230 | // same things for corrected hit |
1231 | // better to use copy constructor, after checking that it works properly !!!! | |
1232 | extrapCorrHit-> | |
1233 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1234 | extrapCorrHit-> | |
1235 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
1236 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1237 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
a9e2aefa | 1238 | // Loop over hits in the chamber |
956019b6 | 1239 | ch = 2 * station + chInStation; |
a9e2aefa | 1240 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; |
1241 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + | |
1242 | fNHitsForRecPerChamber[ch]; | |
1243 | iHit++) { | |
1244 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
d0bfce8d | 1245 | // correction of corrected hit (fBendingCoor and fNonBendingCoor) |
1246 | // according to real Z value of "hit" and slopes of right "trackParam" | |
1247 | extrapCorrHit-> | |
1248 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() + | |
1249 | (&(trackParam[chInStation]))->GetBendingSlope() * | |
1250 | (hit->GetZ() - | |
1251 | (&(trackParam[chInStation]))->GetZ())); | |
1252 | extrapCorrHit-> | |
1253 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() + | |
1254 | (&(trackParam[chInStation]))->GetNonBendingSlope() * | |
1255 | (hit->GetZ() - | |
1256 | (&(trackParam[chInStation]))->GetZ())); | |
a9e2aefa | 1257 | // condition for hit not already in segment ???? |
1258 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); | |
1259 | if (chi2 < bestChi2) { | |
1260 | // update best Chi2 and HitForRec if better found | |
1261 | bestHit = hit; | |
1262 | bestChi2 = chi2; | |
d82671a0 | 1263 | chBestHit = chInStation; |
a9e2aefa | 1264 | } |
1265 | } | |
1266 | } | |
1267 | if (bestHit) { | |
1268 | // best hit found: add it to track candidate | |
1269 | track->AddHitForRec(bestHit); | |
956019b6 | 1270 | // set track parameters at this TrackHit |
a9e2aefa | 1271 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, |
1272 | &(trackParam[chBestHit])); | |
1273 | if (fPrintLevel >= 10) { | |
1274 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1275 | << " Added hit in station(0..): " << station << endl; | |
1276 | track->RecursiveDump(); | |
1277 | } | |
1278 | } | |
1279 | else { | |
8429a5e4 | 1280 | // Remove current track candidate |
1281 | // and corresponding TrackHit's, ... | |
1282 | track->Remove(); | |
04b5ea16 | 1283 | delete extrapSegment; |
d0bfce8d | 1284 | delete extrapCorrSegment; |
1285 | delete extrapHit; | |
1286 | delete extrapCorrHit; | |
a9e2aefa | 1287 | break; // stop the search for this candidate: |
1288 | // exit from the loop over station | |
1289 | } | |
d0bfce8d | 1290 | delete extrapHit; |
1291 | delete extrapCorrHit; | |
a9e2aefa | 1292 | } |
04b5ea16 | 1293 | delete extrapSegment; |
d0bfce8d | 1294 | delete extrapCorrSegment; |
a9e2aefa | 1295 | // Sort track hits according to increasing Z |
1296 | track->GetTrackHitsPtr()->Sort(); | |
1297 | // Update track parameters at first track hit (smallest Z) | |
1298 | trackParam1 = ((AliMUONTrackHit*) | |
1299 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
d0bfce8d | 1300 | bendingMomentum = 0.; |
1301 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.) | |
1302 | bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum())); | |
1303 | // Track removed if bendingMomentum not in window [min, max] | |
1304 | if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) { | |
1305 | track->Remove(); | |
1306 | break; // stop the search for this candidate: | |
1307 | // exit from the loop over station | |
1308 | } | |
956019b6 | 1309 | // Track fit |
04b5ea16 | 1310 | // with multiple Coulomb scattering if all stations |
1311 | if (station == 0) track->SetFitMCS(1); | |
956019b6 | 1312 | // without multiple Coulomb scattering if not all stations |
04b5ea16 | 1313 | else track->SetFitMCS(0); |
956019b6 | 1314 | track->SetFitNParam(5); // with 5 parameters (momentum and position) |
1315 | track->SetFitStart(1); // from parameters at first hit | |
1316 | track->Fit(); | |
d0bfce8d | 1317 | Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5); |
1318 | if (numberOfDegFree > 0) { | |
1319 | chi2Norm = track->GetFitFMin() / numberOfDegFree; | |
1320 | } else { | |
1321 | chi2Norm = 1.e10; | |
1322 | } | |
1323 | // Track removed if normalized chi2 too high | |
1324 | if (chi2Norm > fMaxChi2) { | |
1325 | track->Remove(); | |
1326 | break; // stop the search for this candidate: | |
1327 | // exit from the loop over station | |
1328 | } | |
a9e2aefa | 1329 | if (fPrintLevel >= 10) { |
1330 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1331 | << " after fit from station(0..): " << station << " to 4" << endl; | |
1332 | track->RecursiveDump(); | |
1333 | } | |
04b5ea16 | 1334 | // Track extrapolation to the vertex through the absorber (Branson) |
956019b6 | 1335 | // after going through the first station |
04b5ea16 | 1336 | if (station == 0) { |
1337 | trackParamVertex = *trackParam1; | |
1338 | (&trackParamVertex)->ExtrapToVertex(); | |
1339 | track->SetTrackParamAtVertex(&trackParamVertex); | |
6ae236ee | 1340 | if (fPrintLevel >= 1) { |
1341 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1342 | << " after extrapolation to vertex" << endl; | |
1343 | track->RecursiveDump(); | |
1344 | } | |
04b5ea16 | 1345 | } |
a9e2aefa | 1346 | } // for (station = 2;... |
04b5ea16 | 1347 | // go really to next track |
1348 | track = nextTrack; | |
1349 | } // while (track) | |
1350 | // Compression of track array (necessary after Remove ????) | |
1351 | fRecTracksPtr->Compress(); | |
1352 | return; | |
1353 | } | |
1354 | ||
1355 | //__________________________________________________________________________ | |
8429a5e4 | 1356 | void AliMUONEventReconstructor::RemoveDoubleTracks(void) |
1357 | { | |
1358 | // To remove double tracks. | |
1359 | // Tracks are considered identical | |
1360 | // if they have at least half of their hits in common. | |
1361 | // Among two identical tracks, one keeps the track with the larger number of hits | |
1362 | // or, if these numbers are equal, the track with the minimum Chi2. | |
1363 | AliMUONTrack *track1, *track2, *trackToRemove; | |
1364 | Bool_t identicalTracks; | |
1365 | Int_t hitsInCommon, nHits1, nHits2; | |
1366 | identicalTracks = kTRUE; | |
1367 | while (identicalTracks) { | |
1368 | identicalTracks = kFALSE; | |
1369 | // Loop over first track of the pair | |
1370 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
1371 | while (track1 && (!identicalTracks)) { | |
1372 | nHits1 = track1->GetNTrackHits(); | |
1373 | // Loop over second track of the pair | |
1374 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1375 | while (track2 && (!identicalTracks)) { | |
1376 | nHits2 = track2->GetNTrackHits(); | |
1377 | // number of hits in common between two tracks | |
1378 | hitsInCommon = track1->HitsInCommon(track2); | |
1379 | // check for identical tracks | |
1380 | if ((4 * hitsInCommon) >= (nHits1 + nHits2)) { | |
1381 | identicalTracks = kTRUE; | |
1382 | // decide which track to remove | |
1383 | if (nHits1 > nHits2) trackToRemove = track2; | |
1384 | else if (nHits1 < nHits2) trackToRemove = track1; | |
1385 | else if ((track1->GetFitFMin()) < (track2->GetFitFMin())) | |
1386 | trackToRemove = track2; | |
1387 | else trackToRemove = track1; | |
1388 | // remove it | |
1389 | trackToRemove->Remove(); | |
1390 | } | |
1391 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
1392 | } // track2 | |
1393 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1394 | } // track1 | |
1395 | } | |
1396 | return; | |
1397 | } | |
1398 | ||
1399 | //__________________________________________________________________________ | |
04b5ea16 | 1400 | void AliMUONEventReconstructor::EventDump(void) |
1401 | { | |
1402 | // Dump reconstructed event (track parameters at vertex and at first hit), | |
1403 | // and the particle parameters | |
1404 | ||
1405 | AliMUONTrack *track; | |
1406 | AliMUONTrackParam *trackParam, *trackParam1; | |
04b5ea16 | 1407 | Double_t bendingSlope, nonBendingSlope, pYZ; |
1408 | Double_t pX, pY, pZ, x, y, z, c; | |
1409 | Int_t np, trackIndex, nTrackHits; | |
1410 | ||
1411 | if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl; | |
1412 | if (fPrintLevel >= 1) { | |
1413 | cout << " Number of Reconstructed tracks :" << fNRecTracks << endl; | |
1414 | } | |
1415 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole | |
1416 | // Loop over reconstructed tracks | |
1417 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { | |
83dbc640 | 1418 | if (fTrackMethod != 1) continue; //AZ - skip the rest for now |
04b5ea16 | 1419 | if (fPrintLevel >= 1) |
1420 | cout << " track number: " << trackIndex << endl; | |
1421 | // function for each track for modularity ???? | |
1422 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); | |
1423 | nTrackHits = track->GetNTrackHits(); | |
1424 | if (fPrintLevel >= 1) | |
1425 | cout << " number of track hits: " << nTrackHits << endl; | |
1426 | // track parameters at Vertex | |
1427 | trackParam = track->GetTrackParamAtVertex(); | |
1428 | x = trackParam->GetNonBendingCoor(); | |
1429 | y = trackParam->GetBendingCoor(); | |
1430 | z = trackParam->GetZ(); | |
1431 | bendingSlope = trackParam->GetBendingSlope(); | |
1432 | nonBendingSlope = trackParam->GetNonBendingSlope(); | |
1433 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); | |
1434 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); | |
1435 | pX = pZ * nonBendingSlope; | |
1436 | pY = pZ * bendingSlope; | |
1437 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); | |
1438 | if (fPrintLevel >= 1) | |
1439 | printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1440 | z, x, y, pX, pY, pZ, c); | |
1441 | ||
1442 | // track parameters at first hit | |
1443 | trackParam1 = ((AliMUONTrackHit*) | |
1444 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1445 | x = trackParam1->GetNonBendingCoor(); | |
1446 | y = trackParam1->GetBendingCoor(); | |
1447 | z = trackParam1->GetZ(); | |
1448 | bendingSlope = trackParam1->GetBendingSlope(); | |
1449 | nonBendingSlope = trackParam1->GetNonBendingSlope(); | |
1450 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); | |
1451 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); | |
1452 | pX = pZ * nonBendingSlope; | |
1453 | pY = pZ * bendingSlope; | |
1454 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); | |
1455 | if (fPrintLevel >= 1) | |
1456 | printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1457 | z, x, y, pX, pY, pZ, c); | |
1458 | } | |
1459 | // informations about generated particles | |
2ab0c725 | 1460 | np = gAlice->GetNtrack(); |
04b5ea16 | 1461 | printf(" **** number of generated particles: %d \n", np); |
1462 | ||
88cb7938 | 1463 | // for (Int_t iPart = 0; iPart < np; iPart++) { |
1464 | // p = gAlice->Particle(iPart); | |
1465 | // printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", | |
1466 | // iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); | |
1467 | // } | |
a9e2aefa | 1468 | return; |
1469 | } | |
1470 | ||
c7ba256d | 1471 | void AliMUONEventReconstructor::FillEvent() |
1472 | { | |
1473 | // Create a new AliMUONRecoEvent, fill its track list, then add it as a | |
1474 | // leaf in the Event branch of TreeRecoEvent tree | |
1475 | cout << "Enter FillEvent() ...\n"; | |
1476 | ||
1477 | if (!fRecoEvent) { | |
1478 | fRecoEvent = new AliMUONRecoEvent(); | |
1479 | } else { | |
1480 | fRecoEvent->Clear(); | |
1481 | } | |
1482 | //save current directory | |
1483 | TDirectory *current = gDirectory; | |
1484 | if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE"); | |
1485 | if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events"); | |
83dbc640 | 1486 | //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) { |
1487 | if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ | |
c7ba256d | 1488 | if (fPrintLevel > 1) fRecoEvent->EventInfo(); |
1489 | TBranch *branch = fEventTree->GetBranch("Event"); | |
d0f40f23 | 1490 | if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000); |
c7ba256d | 1491 | branch->SetAutoDelete(); |
1492 | fTreeFile->cd(); | |
1493 | fEventTree->Fill(); | |
1494 | fTreeFile->Write(); | |
1495 | } | |
1496 | // restore directory | |
1497 | current->cd(); | |
1498 | } | |
83dbc640 | 1499 | |
1500 | //__________________________________________________________________________ | |
1501 | void AliMUONEventReconstructor::MakeTrackCandidatesK(void) | |
1502 | { | |
1503 | // To make initial tracks for Kalman filter from the list of segments | |
1504 | Int_t istat, iseg; | |
1505 | AliMUONSegment *segment; | |
1506 | AliMUONTrackK *trackK; | |
1507 | ||
1508 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl; | |
1509 | // Reset the TClonesArray of reconstructed tracks | |
1510 | if (fRecTracksPtr) fRecTracksPtr->Delete(); | |
1511 | // Delete in order that the Track destructors are called, | |
1512 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
1513 | fNRecTracks = 0; | |
1514 | ||
1515 | AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ??? | |
1516 | // Loop over stations(1...) 5 and 4 | |
1517 | for (istat=4; istat>=3; istat--) { | |
1518 | // Loop over segments in the station | |
1519 | for (iseg=0; iseg<fNSegments[istat]; iseg++) { | |
1520 | // Transform segments to tracks and evaluate covariance matrix | |
1521 | segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]); | |
1522 | trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment); | |
1523 | fNRecTracks++; | |
1524 | } // for (iseg=0;...) | |
1525 | } // for (istat=4;...) | |
1526 | return; | |
1527 | } | |
1528 | ||
1529 | //__________________________________________________________________________ | |
1530 | void AliMUONEventReconstructor::FollowTracksK(void) | |
1531 | { | |
1532 | // Follow tracks using Kalman filter | |
1533 | Bool_t Ok; | |
1534 | Int_t icand, ichamBeg, ichamEnd, chamBits; | |
1535 | Double_t zDipole1, zDipole2; | |
1536 | AliMUONTrackK *trackK; | |
1537 | AliMUONHitForRec *hit; | |
1538 | AliMUONRawCluster *clus; | |
1539 | TClonesArray *rawclusters; | |
1540 | AliMUON *pMUON; | |
1541 | clus = 0; rawclusters = 0; | |
1542 | ||
1543 | zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2; | |
1544 | zDipole2 = zDipole1 + GetSimpleBLength(); | |
1545 | ||
1546 | // Print hits | |
1547 | pMUON = (AliMUON*) gAlice->GetModule("MUON"); | |
1548 | for (Int_t i1=0; i1<fNHitsForRec; i1++) { | |
1549 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]); | |
1550 | //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue; | |
1551 | /* | |
1552 | cout << " Hit #" << hit->GetChamberNumber() << " "; | |
1553 | cout << hit->GetBendingCoor() << " "; | |
1554 | cout << hit->GetNonBendingCoor() << " "; | |
1555 | cout << hit->GetZ() << " "; | |
1556 | cout << hit->GetGeantSignal() << " "; | |
1557 | cout << hit->GetTHTrack() << endl; | |
1558 | */ | |
1559 | /* | |
1560 | printf(" Hit # %d %10.4f %10.4f %10.4f", | |
1561 | hit->GetChamberNumber(), hit->GetBendingCoor(), | |
1562 | hit->GetNonBendingCoor(), hit->GetZ()); | |
1563 | if (fRecGeantHits) { | |
1564 | // from GEANT hits | |
1565 | printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack()); | |
1566 | } else { | |
1567 | // from raw clusters | |
1568 | rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber()); | |
1569 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit-> | |
1570 | GetHitNumber()); | |
1571 | printf("%3d", clus->fTracks[1]-1); | |
1572 | if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1); | |
1573 | else printf("\n"); | |
1574 | } | |
1575 | */ | |
1576 | } | |
1577 | ||
1578 | icand = -1; | |
1579 | Int_t nSeeds = fNRecTracks; // starting number of seeds | |
1580 | // Loop over track candidates | |
1581 | while (icand < fNRecTracks-1) { | |
1582 | icand ++; | |
1583 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1584 | ||
1585 | // Discard candidate which will produce the double track | |
1586 | if (icand > 0) { | |
1587 | Ok = CheckCandidateK(icand,nSeeds); | |
1588 | if (!Ok) { | |
1589 | //trackK->SetRecover(-1); // mark candidate to be removed | |
1590 | //continue; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | Ok = kTRUE; | |
1595 | if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*) | |
1596 | trackK->GetHitOnTrack()->Last(); // last hit | |
1597 | else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit | |
1598 | ichamBeg = hit->GetChamberNumber(); | |
1599 | ichamEnd = 0; | |
1600 | // Check propagation direction | |
1601 | if (trackK->GetTrackDir() > 0) { | |
1602 | ichamEnd = 9; // forward propagation | |
1603 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1604 | if (Ok) { | |
1605 | ichamBeg = ichamEnd; | |
1606 | ichamEnd = 6; // backward propagation | |
1607 | // Change weight matrix and zero fChi2 for backpropagation | |
1608 | trackK->StartBack(); | |
1609 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1610 | ichamBeg = ichamEnd; | |
1611 | ichamEnd = 0; | |
1612 | } | |
1613 | } else { | |
1614 | if (trackK->GetBPFlag()) { | |
1615 | // backpropagation | |
1616 | ichamEnd = 6; // backward propagation | |
1617 | // Change weight matrix and zero fChi2 for backpropagation | |
1618 | trackK->StartBack(); | |
1619 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1620 | ichamBeg = ichamEnd; | |
1621 | ichamEnd = 0; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | if (Ok) { | |
1626 | trackK->SetTrackDir(-1); | |
1627 | trackK->SetBPFlag(kFALSE); | |
1628 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1629 | } | |
1630 | if (Ok) trackK->SetTrackQuality(0); // compute "track quality" | |
1631 | else trackK->SetRecover(-1); // mark candidate to be removed | |
1632 | ||
1633 | // Majority 3 of 4 in first 2 stations | |
1634 | chamBits = 0; | |
1635 | for (Int_t i=0; i<trackK->GetNTrackHits(); i++) { | |
1636 | hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i]; | |
1637 | chamBits |= BIT(hit->GetChamberNumber()-1); | |
1638 | } | |
1639 | //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1); | |
1640 | //mark candidate to be removed | |
1641 | } // while | |
1642 | ||
1643 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1644 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1645 | if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i); | |
1646 | } | |
1647 | ||
1648 | // Compress TClonesArray | |
1649 | fRecTracksPtr->Compress(); | |
1650 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1651 | return; | |
1652 | } | |
1653 | ||
1654 | //__________________________________________________________________________ | |
1655 | Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) | |
1656 | { | |
1657 | // Discards track candidate if it will produce the double track (having | |
1658 | // the same seed segment hits as hits of a good track found before) | |
1659 | AliMUONTrackK *track1, *track2; | |
1660 | AliMUONHitForRec *hit1, *hit2, *hit; | |
1661 | ||
1662 | track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1663 | hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit | |
1664 | hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit | |
1665 | ||
1666 | for (Int_t i=0; i<icand; i++) { | |
1667 | track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1668 | //if (track2->GetRecover() < 0) continue; | |
1669 | if (track2->GetRecover() < 0 && icand >= nSeeds) continue; | |
1670 | ||
1671 | if (track1->GetStartSegment() == track2->GetStartSegment()) { | |
1672 | return kFALSE; | |
1673 | } else { | |
1674 | Int_t nSame = 0; | |
1675 | for (Int_t j=0; j<track2->GetNTrackHits(); j++) { | |
1676 | hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j]; | |
1677 | if (hit == hit1 || hit == hit2) { | |
1678 | nSame++; | |
1679 | if (nSame == 2) return kFALSE; | |
1680 | } | |
1681 | } // for (Int_t j=0; | |
1682 | } | |
1683 | } // for (Int_t i=0; | |
1684 | return kTRUE; | |
1685 | } | |
1686 | ||
1687 | //__________________________________________________________________________ | |
1688 | void AliMUONEventReconstructor::RemoveDoubleTracksK(void) | |
1689 | { | |
1690 | // Removes double tracks (sharing more than half of their hits). Keeps | |
1691 | // the track with higher quality | |
1692 | AliMUONTrackK *track1, *track2, *trackToKill; | |
1693 | ||
1694 | // Sort tracks according to their quality | |
1695 | fRecTracksPtr->Sort(); | |
1696 | ||
1697 | // Loop over first track of the pair | |
1698 | track1 = (AliMUONTrackK*) fRecTracksPtr->First(); | |
1699 | while (track1) { | |
1700 | // Loop over second track of the pair | |
1701 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1702 | while (track2) { | |
1703 | // Check whether or not to keep track2 | |
1704 | if (!track2->KeepTrack(track1)) { | |
1705 | cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) << | |
1706 | " " << track2->GetTrackQuality() << endl; | |
1707 | trackToKill = track2; | |
1708 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1709 | trackToKill->Kill(); | |
1710 | fRecTracksPtr->Compress(); | |
1711 | } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1712 | } // track2 | |
1713 | track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1714 | } // track1 | |
1715 | ||
1716 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1717 | cout << " Number of Kalman tracks: " << fNRecTracks << endl; | |
1718 | } | |
1719 | ||
1720 | //__________________________________________________________________________ | |
1721 | void AliMUONEventReconstructor::GoToVertex(void) | |
1722 | { | |
1723 | // Propagates track to the vertex thru absorber | |
1724 | // (using Branson correction for now) | |
1725 | ||
1726 | Double_t zVertex; | |
1727 | zVertex = 0; | |
1728 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1729 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson(); | |
1730 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber | |
1731 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2 | |
1732 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber | |
1733 | } | |
1734 | } |