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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 | |
5d12ce38 | 56 | #include "AliMC.h" |
a9e2aefa | 57 | |
a9e2aefa | 58 | //************* Defaults parameters for reconstruction |
9cbdf048 | 59 | static const Double_t kDefaultMinBendingMomentum = 3.0; |
d0bfce8d | 60 | static const Double_t kDefaultMaxBendingMomentum = 500.0; |
61 | static const Double_t kDefaultMaxChi2 = 100.0; | |
9cbdf048 | 62 | static const Double_t kDefaultMaxSigma2Distance = 16.0; |
63 | static const Double_t kDefaultBendingResolution = 0.01; | |
64 | static const Double_t kDefaultNonBendingResolution = 0.144; | |
65 | static const Double_t kDefaultChamberThicknessInX0 = 0.03; | |
a9e2aefa | 66 | // Simple magnetic field: |
67 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG | |
68 | // Length and Position from reco_muon.F, with opposite sign: | |
69 | // Length = ZMAGEND-ZCOIL | |
70 | // Position = (ZMAGEND+ZCOIL)/2 | |
71 | // to be ajusted differently from real magnetic field ???? | |
9cbdf048 | 72 | static const Double_t kDefaultSimpleBValue = 7.0; |
73 | static const Double_t kDefaultSimpleBLength = 428.0; | |
74 | static const Double_t kDefaultSimpleBPosition = 1019.0; | |
75 | static const Int_t kDefaultRecGeantHits = 0; | |
76 | static const Double_t kDefaultEfficiency = 0.95; | |
a9e2aefa | 77 | |
9cbdf048 | 78 | static const Int_t kDefaultPrintLevel = 0; |
a9e2aefa | 79 | |
80 | ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context | |
81 | ||
82 | //__________________________________________________________________________ | |
83 | AliMUONEventReconstructor::AliMUONEventReconstructor(void) | |
84 | { | |
85 | // Constructor for class AliMUONEventReconstructor | |
86 | SetReconstructionParametersToDefaults(); | |
83dbc640 | 87 | fTrackMethod = 1; //AZ - tracking method (1-default, 2-Kalman) |
a9e2aefa | 88 | // Memory allocation for the TClonesArray of hits for reconstruction |
89 | // Is 10000 the right size ???? | |
90 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
91 | fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ???? | |
92 | // Memory allocation for the TClonesArray's of segments in stations | |
93 | // Is 2000 the right size ???? | |
9cbdf048 | 94 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 95 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); |
96 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
97 | } | |
98 | // Memory allocation for the TClonesArray of reconstructed tracks | |
99 | // Is 10 the right size ???? | |
100 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
101 | fNRecTracks = 0; // really needed or GetEntriesFast sufficient ???? | |
8429a5e4 | 102 | // Memory allocation for the TClonesArray of hits on reconstructed tracks |
103 | // Is 100 the right size ???? | |
104 | fRecTrackHitsPtr = new TClonesArray("AliMUONTrack", 100); | |
105 | fNRecTrackHits = 0; // really needed or GetEntriesFast sufficient ???? | |
a9e2aefa | 106 | |
065bd0e1 | 107 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,950). |
a6f03ddb | 108 | Float_t b[3], x[3]; |
109 | x[0] = 50.; x[1] = 50.; x[2] = 950.; | |
110 | gAlice->Field()->Field(x, b); | |
065bd0e1 | 111 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); |
a6f03ddb | 112 | // See how to get fSimple(BValue, BLength, BPosition) |
113 | // automatically calculated from the actual magnetic field ???? | |
a9e2aefa | 114 | |
115 | if (fPrintLevel >= 0) { | |
a6f03ddb | 116 | cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump(); |
117 | cout << endl << "Magnetic field from root file:" << endl; | |
118 | gAlice->Field()->Dump(); | |
119 | cout << endl; | |
120 | } | |
c7ba256d | 121 | |
47a6b602 | 122 | // Initializions for GEANT background events |
123 | fBkgGeantFile = 0; | |
124 | fBkgGeantTK = 0; | |
125 | fBkgGeantParticles = 0; | |
126 | fBkgGeantTH = 0; | |
127 | fBkgGeantHits = 0; | |
128 | fBkgGeantEventNumber = -1; | |
129 | ||
c7ba256d | 130 | // Initialize to 0 pointers to RecoEvent, tree and tree file |
131 | fRecoEvent = 0; | |
132 | fEventTree = 0; | |
133 | fTreeFile = 0; | |
134 | ||
a9e2aefa | 135 | return; |
136 | } | |
137 | ||
d9a3473d | 138 | AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor):TObject(Reconstructor) |
9cbdf048 | 139 | { |
140 | // Dummy copy constructor | |
141 | } | |
142 | ||
d9a3473d | 143 | AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& /*Reconstructor*/) |
9cbdf048 | 144 | { |
145 | // Dummy assignment operator | |
146 | return *this; | |
147 | } | |
148 | ||
a9e2aefa | 149 | //__________________________________________________________________________ |
150 | AliMUONEventReconstructor::~AliMUONEventReconstructor(void) | |
151 | { | |
152 | // Destructor for class AliMUONEventReconstructor | |
c7ba256d | 153 | if (fTreeFile) { |
154 | fTreeFile->Close(); | |
155 | delete fTreeFile; | |
156 | } | |
157 | // if (fEventTree) delete fEventTree; | |
158 | if (fRecoEvent) delete fRecoEvent; | |
a9e2aefa | 159 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? |
9cbdf048 | 160 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 161 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? |
162 | return; | |
163 | } | |
164 | ||
165 | //__________________________________________________________________________ | |
166 | void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void) | |
167 | { | |
168 | // Set reconstruction parameters to default values | |
169 | // Would be much more convenient with a structure (or class) ???? | |
9cbdf048 | 170 | fMinBendingMomentum = kDefaultMinBendingMomentum; |
d0bfce8d | 171 | fMaxBendingMomentum = kDefaultMaxBendingMomentum; |
172 | fMaxChi2 = kDefaultMaxChi2; | |
9cbdf048 | 173 | fMaxSigma2Distance = kDefaultMaxSigma2Distance; |
a9e2aefa | 174 | |
9cbdf048 | 175 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); |
a9e2aefa | 176 | // ******** Parameters for making HitsForRec |
177 | // minimum radius, | |
178 | // like in TRACKF_STAT: | |
179 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; | |
180 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 | |
9cbdf048 | 181 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
182 | if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) * | |
a9e2aefa | 183 | 2.0 * TMath::Pi() / 180.0; |
184 | else fRMin[ch] = 30.0; | |
d0bfce8d | 185 | // maximum radius at 10 degrees and Z of chamber |
186 | fRMax[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) * | |
187 | 10.0 * TMath::Pi() / 180.0; | |
a9e2aefa | 188 | } |
a9e2aefa | 189 | |
190 | // ******** Parameters for making segments | |
191 | // should be parametrized ???? | |
192 | // according to interval between chambers in a station ???? | |
193 | // Maximum distance in non bending plane | |
194 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
195 | // SIGCUT*DYMAX(IZ) | |
9cbdf048 | 196 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 197 | fSegmentMaxDistNonBending[st] = 5. * 0.22; |
860cef81 | 198 | // Maximum distance in bending plane: |
199 | // values from TRACKF_STAT, corresponding to (J psi 20cm), | |
200 | // scaled to the real distance between chambers in a station | |
ef21c79e | 201 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * |
202 | ((&(pMUON->Chamber(1)))->Z() - (&(pMUON->Chamber(0)))->Z()) / 20.0); | |
203 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * | |
204 | ((&(pMUON->Chamber(3)))->Z() - (&(pMUON->Chamber(2)))->Z()) / 20.0); | |
205 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * | |
206 | ((&(pMUON->Chamber(5)))->Z() - (&(pMUON->Chamber(4)))->Z()) / 20.0); | |
207 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * | |
208 | ((&(pMUON->Chamber(7)))->Z() - (&(pMUON->Chamber(6)))->Z()) / 20.0); | |
209 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * | |
210 | ((&(pMUON->Chamber(9)))->Z() - (&(pMUON->Chamber(8)))->Z()) / 20.0); | |
a9e2aefa | 211 | |
9cbdf048 | 212 | fBendingResolution = kDefaultBendingResolution; |
213 | fNonBendingResolution = kDefaultNonBendingResolution; | |
214 | fChamberThicknessInX0 = kDefaultChamberThicknessInX0; | |
215 | fSimpleBValue = kDefaultSimpleBValue; | |
216 | fSimpleBLength = kDefaultSimpleBLength; | |
217 | fSimpleBPosition = kDefaultSimpleBPosition; | |
218 | fRecGeantHits = kDefaultRecGeantHits; | |
219 | fEfficiency = kDefaultEfficiency; | |
220 | fPrintLevel = kDefaultPrintLevel; | |
a9e2aefa | 221 | return; |
222 | } | |
223 | ||
224 | //__________________________________________________________________________ | |
3831f268 | 225 | Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const |
a9e2aefa | 226 | { |
227 | // Returns impact parameter at vertex in bending plane (cm), | |
228 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
229 | // using simple values for dipole magnetic field. | |
065bd0e1 | 230 | // The sign of "BendingMomentum" is the sign of the charge. |
a9e2aefa | 231 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
232 | BendingMomentum); | |
233 | } | |
234 | ||
235 | //__________________________________________________________________________ | |
3831f268 | 236 | Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const |
a9e2aefa | 237 | { |
238 | // Returns signed bending momentum in bending plane (GeV/c), | |
065bd0e1 | 239 | // the sign being the sign of the charge for particles moving forward in Z, |
a9e2aefa | 240 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), |
241 | // using simple values for dipole magnetic field. | |
a9e2aefa | 242 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
243 | ImpactParam); | |
244 | } | |
245 | ||
246 | //__________________________________________________________________________ | |
247 | void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName) | |
248 | { | |
249 | // Set background file ... for GEANT hits | |
250 | // Must be called after having loaded the firts signal event | |
251 | if (fPrintLevel >= 0) { | |
252 | cout << "Enter SetBkgGeantFile with BkgGeantFileName ``" | |
253 | << BkgGeantFileName << "''" << endl;} | |
254 | if (strlen(BkgGeantFileName)) { | |
255 | // BkgGeantFileName not empty: try to open the file | |
256 | if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();} | |
257 | fBkgGeantFile = new TFile(BkgGeantFileName); | |
258 | if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();} | |
259 | if (fBkgGeantFile-> IsOpen()) { | |
260 | if (fPrintLevel >= 0) { | |
261 | cout << "Background for GEANT hits in file: ``" << BkgGeantFileName | |
262 | << "'' successfully opened" << endl;} | |
263 | } | |
264 | else { | |
265 | cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl; | |
266 | cout << "NOT FOUND: EXIT" << endl; | |
267 | exit(0); // right instruction for exit ???? | |
268 | } | |
269 | // Arrays for "particles" and "hits" | |
270 | fBkgGeantParticles = new TClonesArray("TParticle", 200); | |
271 | fBkgGeantHits = new TClonesArray("AliMUONHit", 2000); | |
272 | // Event number to -1 for initialization | |
273 | fBkgGeantEventNumber = -1; | |
274 | // Back to the signal file: | |
275 | // first signal event must have been loaded previously, | |
276 | // otherwise, Segmentation violation at the next instruction | |
277 | // How is it possible to do smething better ???? | |
278 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
279 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
280 | } | |
281 | return; | |
282 | } | |
283 | ||
284 | //__________________________________________________________________________ | |
285 | void AliMUONEventReconstructor::NextBkgGeantEvent(void) | |
286 | { | |
287 | // Get next event in background file for GEANT hits | |
288 | // Goes back to event number 0 when end of file is reached | |
289 | char treeName[20]; | |
290 | TBranch *branch; | |
291 | if (fPrintLevel >= 0) { | |
292 | cout << "Enter NextBkgGeantEvent" << endl;} | |
293 | // Clean previous event | |
294 | if(fBkgGeantTK) delete fBkgGeantTK; | |
295 | fBkgGeantTK = NULL; | |
296 | if(fBkgGeantParticles) fBkgGeantParticles->Clear(); | |
297 | if(fBkgGeantTH) delete fBkgGeantTH; | |
298 | fBkgGeantTH = NULL; | |
299 | if(fBkgGeantHits) fBkgGeantHits->Clear(); | |
300 | // Increment event number | |
301 | fBkgGeantEventNumber++; | |
302 | // Get access to Particles and Hits for event from background file | |
303 | if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();} | |
304 | fBkgGeantFile->cd(); | |
305 | if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();} | |
306 | // Particles: TreeK for event and branch "Particles" | |
307 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
308 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
309 | if (!fBkgGeantTK) { | |
310 | if (fPrintLevel >= 0) { | |
311 | cout << "Cannot find Kine Tree for background event: " << | |
312 | fBkgGeantEventNumber << endl; | |
313 | cout << "Goes back to event 0" << endl; | |
314 | } | |
315 | fBkgGeantEventNumber = 0; | |
316 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
317 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
318 | if (!fBkgGeantTK) { | |
319 | cout << "ERROR: cannot find Kine Tree for background event: " << | |
320 | fBkgGeantEventNumber << endl; | |
321 | exit(0); | |
322 | } | |
323 | } | |
324 | if (fBkgGeantTK) | |
325 | fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles); | |
326 | fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ???? | |
327 | // Hits: TreeH for event and branch "MUON" | |
328 | sprintf(treeName, "TreeH%d", fBkgGeantEventNumber); | |
329 | fBkgGeantTH = (TTree*)gDirectory->Get(treeName); | |
330 | if (!fBkgGeantTH) { | |
331 | cout << "ERROR: cannot find Hits Tree for background event: " << | |
332 | fBkgGeantEventNumber << endl; | |
333 | exit(0); | |
334 | } | |
335 | if (fBkgGeantTH && fBkgGeantHits) { | |
336 | branch = fBkgGeantTH->GetBranch("MUON"); | |
337 | if (branch) branch->SetAddress(&fBkgGeantHits); | |
338 | } | |
339 | fBkgGeantTH->GetEntries(); // necessary ???? | |
340 | // Back to the signal file | |
341 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
342 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
343 | return; | |
344 | } | |
345 | ||
346 | //__________________________________________________________________________ | |
347 | void AliMUONEventReconstructor::EventReconstruct(void) | |
348 | { | |
349 | // To reconstruct one event | |
350 | if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl; | |
351 | MakeEventToBeReconstructed(); | |
352 | MakeSegments(); | |
353 | MakeTracks(); | |
354 | return; | |
355 | } | |
356 | ||
357 | //__________________________________________________________________________ | |
358 | void AliMUONEventReconstructor::ResetHitsForRec(void) | |
359 | { | |
360 | // To reset the array and the number of HitsForRec, | |
361 | // and also the number of HitsForRec | |
362 | // and the index of the first HitForRec per chamber | |
363 | if (fHitsForRecPtr) fHitsForRecPtr->Clear(); | |
364 | fNHitsForRec = 0; | |
9cbdf048 | 365 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) |
a9e2aefa | 366 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; |
367 | return; | |
368 | } | |
369 | ||
370 | //__________________________________________________________________________ | |
371 | void AliMUONEventReconstructor::ResetSegments(void) | |
372 | { | |
373 | // To reset the TClonesArray of segments and the number of Segments | |
374 | // for all stations | |
9cbdf048 | 375 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 376 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); |
377 | fNSegments[st] = 0; | |
378 | } | |
379 | return; | |
380 | } | |
381 | ||
382 | //__________________________________________________________________________ | |
383 | void AliMUONEventReconstructor::ResetTracks(void) | |
384 | { | |
385 | // To reset the TClonesArray of reconstructed tracks | |
8429a5e4 | 386 | if (fRecTracksPtr) fRecTracksPtr->Delete(); |
387 | // Delete in order that the Track destructors are called, | |
388 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
a9e2aefa | 389 | fNRecTracks = 0; |
390 | return; | |
391 | } | |
392 | ||
8429a5e4 | 393 | //__________________________________________________________________________ |
394 | void AliMUONEventReconstructor::ResetTrackHits(void) | |
395 | { | |
396 | // To reset the TClonesArray of hits on reconstructed tracks | |
397 | if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear(); | |
398 | fNRecTrackHits = 0; | |
399 | return; | |
400 | } | |
401 | ||
a9e2aefa | 402 | //__________________________________________________________________________ |
403 | void AliMUONEventReconstructor::MakeEventToBeReconstructed(void) | |
404 | { | |
405 | // To make the list of hits to be reconstructed, | |
406 | // either from the GEANT hits or from the raw clusters | |
407 | // according to the parameter set for the reconstructor | |
88cb7938 | 408 | TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly |
409 | ||
410 | AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname); | |
411 | if (rl == 0x0) | |
412 | { | |
413 | Error("MakeEventToBeReconstructed", | |
414 | "Can not find Run Loader in Event Folder named %s.", | |
415 | evfoldname.Data()); | |
416 | return; | |
417 | } | |
418 | AliLoader* gime = rl->GetLoader("MUONLoader"); | |
419 | if (gime == 0x0) | |
420 | { | |
421 | Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader."); | |
422 | return; | |
423 | } | |
424 | ||
a9e2aefa | 425 | if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl; |
426 | ResetHitsForRec(); | |
427 | if (fRecGeantHits == 1) { | |
428 | // Reconstruction from GEANT hits | |
429 | // Back to the signal file | |
88cb7938 | 430 | TTree* treeH = gime->TreeH(); |
431 | if (treeH == 0x0) | |
432 | { | |
433 | Int_t retval = gime->LoadHits(); | |
434 | if ( retval) | |
435 | { | |
436 | Error("MakeEventToBeReconstructed","Error occured while loading hits."); | |
437 | return; | |
438 | } | |
439 | treeH = gime->TreeH(); | |
440 | if (treeH == 0x0) | |
441 | { | |
442 | Error("MakeEventToBeReconstructed","Can not get TreeH"); | |
443 | return; | |
444 | } | |
445 | } | |
446 | ||
447 | AddHitsForRecFromGEANT(treeH); | |
448 | ||
a9e2aefa | 449 | // Background hits |
450 | AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits); | |
451 | // Sort HitsForRec in increasing order with respect to chamber number | |
452 | SortHitsForRecWithIncreasingChamber(); | |
453 | } | |
454 | else { | |
455 | // Reconstruction from raw clusters | |
456 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
457 | // Security on MUON ???? | |
458 | // TreeR assumed to be be "prepared" in calling function | |
459 | // by "MUON->GetTreeR(nev)" ???? | |
88cb7938 | 460 | TTree *treeR = gime->TreeR(); |
9cbdf048 | 461 | AddHitsForRecFromRawClusters(treeR); |
a9e2aefa | 462 | // No sorting: it is done automatically in the previous function |
463 | } | |
464 | if (fPrintLevel >= 10) { | |
465 | cout << "end of MakeEventToBeReconstructed" << endl; | |
466 | cout << "NHitsForRec: " << fNHitsForRec << endl; | |
9cbdf048 | 467 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 468 | cout << "chamber(0...): " << ch |
469 | << " NHitsForRec: " << fNHitsForRecPerChamber[ch] | |
470 | << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch] | |
471 | << endl; | |
472 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
473 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
474 | hit++) { | |
475 | cout << "HitForRec index(0...): " << hit << endl; | |
476 | ((*fHitsForRecPtr)[hit])->Dump(); | |
477 | } | |
478 | } | |
479 | } | |
480 | return; | |
481 | } | |
482 | ||
483 | //__________________________________________________________________________ | |
484 | void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH) | |
485 | { | |
486 | // To add to the list of hits for reconstruction | |
487 | // the GEANT signal hits from a hit tree TH. | |
83dbc640 | 488 | Int_t hitBits, chamBits; //AZ |
a9e2aefa | 489 | if (fPrintLevel >= 2) |
490 | cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl; | |
491 | if (TH == NULL) return; | |
9cbdf048 | 492 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
38302c61 | 493 | AliMUONData * muondata = pMUON->GetMUONData(); |
a9e2aefa | 494 | // Security on MUON ???? |
495 | // See whether it could be the same for signal and background ???? | |
496 | // Loop over tracks in tree | |
497 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
498 | if (fPrintLevel >= 2) | |
499 | cout << "ntracks: " << ntracks << endl; | |
83dbc640 | 500 | fMuons = 0; //AZ |
a9e2aefa | 501 | for (Int_t track = 0; track < ntracks; track++) { |
38302c61 | 502 | muondata->ResetHits(); |
a9e2aefa | 503 | TH->GetEvent(track); |
504 | // Loop over hits | |
505 | Int_t hit = 0; | |
83dbc640 | 506 | hitBits = 0; // AZ |
507 | chamBits = 0; // AZ | |
508 | Int_t itrack = track; //AZ | |
38302c61 | 509 | |
510 | Int_t ihit, nhits=0; | |
511 | nhits = (Int_t) muondata->Hits()->GetEntriesFast(); | |
512 | AliMUONHit* mHit=0x0; | |
1391e633 | 513 | |
38302c61 | 514 | for(ihit=0; ihit<nhits; ihit++) { |
515 | mHit = static_cast<AliMUONHit*>(muondata->Hits()->At(ihit)); | |
516 | Int_t ipart = TMath::Abs ((Int_t) mHit->Particle()); //AZ | |
517 | if (NewHitForRecFromGEANT(mHit,track, hit, 1) && ipart == 13 | |
518 | //if (NewHitForRecFromGEANT(mHit,itrack-1, hit, 1) && ipart == 13 | |
1391e633 | 519 | && itrack <= 2 && !BIT(mHit->Chamber()-1) ) chamBits |= BIT(mHit->Chamber()-1); //AZ - set bit |
38302c61 | 520 | } |
1391e633 | 521 | |
83dbc640 | 522 | if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 && |
523 | chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3)) | |
524 | fMuons += 1; //AZ | |
525 | //if (chamBits&3 && chamBits>>2&3 && chamBits>>4&3 && chamBits>>6&3 && | |
526 | // chamBits>>8&3 && ((chamBits>>6&3)==3 || (chamBits>>8&3)==3) && | |
527 | // ((chamBits&3)==3 || (chamBits>>2&3)==3)) fMuons += 1; | |
a9e2aefa | 528 | } // end of track loop |
529 | return; | |
530 | } | |
531 | ||
532 | //__________________________________________________________________________ | |
533 | void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits) | |
534 | { | |
535 | // To add to the list of hits for reconstruction | |
536 | // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list. | |
537 | // How to have only one function "AddHitsForRecFromGEANT" ???? | |
538 | if (fPrintLevel >= 2) | |
539 | cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl; | |
540 | if (TH == NULL) return; | |
541 | // Loop over tracks in tree | |
542 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
543 | if (fPrintLevel >= 2) | |
544 | cout << "ntracks: " << ntracks << endl; | |
545 | for (Int_t track = 0; track < ntracks; track++) { | |
546 | if (Hits) Hits->Clear(); | |
547 | TH->GetEvent(track); | |
548 | // Loop over hits | |
549 | for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) { | |
550 | NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0); | |
551 | } // end of hit loop | |
552 | } // end of track loop | |
553 | return; | |
554 | } | |
555 | ||
556 | //__________________________________________________________________________ | |
557 | AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal) | |
558 | { | |
559 | // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit", | |
560 | // with hit number "HitNumber" in the track numbered "TrackNumber", | |
561 | // either from signal ("Signal" = 1) or background ("Signal" = 0) event. | |
562 | // Selects hits in tracking (not trigger) chambers. | |
563 | // Takes into account the efficiency (fEfficiency) | |
564 | // and the smearing from resolution (fBendingResolution and fNonBendingResolution). | |
565 | // Adds a condition on the radius between RMin and RMax | |
566 | // to better simulate the real chambers. | |
567 | // Returns the pointer to the new hit for reconstruction, | |
568 | // or NULL in case of inefficiency or non tracking chamber or bad radius. | |
569 | // No condition on at most 20 cm from a muon from a resonance | |
570 | // like in Fortran TRACKF_STAT. | |
571 | AliMUONHitForRec* hitForRec; | |
572 | Double_t bendCoor, nonBendCoor, radius; | |
0a5f36d9 | 573 | Int_t chamber = Hit->Chamber() - 1; // chamber(0...) |
a9e2aefa | 574 | // only in tracking chambers (fChamber starts at 1) |
9cbdf048 | 575 | if (chamber >= kMaxMuonTrackingChambers) return NULL; |
a9e2aefa | 576 | // only if hit is efficient (keep track for checking ????) |
577 | if (gRandom->Rndm() > fEfficiency) return NULL; | |
578 | // only if radius between RMin and RMax | |
94de3818 | 579 | bendCoor = Hit->Y(); |
580 | nonBendCoor = Hit->X(); | |
a9e2aefa | 581 | radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor)); |
d0bfce8d | 582 | // This cut is not needed with a realistic chamber geometry !!!! |
583 | // if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL; | |
a9e2aefa | 584 | // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's |
585 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit); | |
586 | fNHitsForRec++; | |
587 | // add smearing from resolution | |
588 | hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution)); | |
589 | hitForRec->SetNonBendingCoor(nonBendCoor | |
590 | + gRandom->Gaus(0., fNonBendingResolution)); | |
d0bfce8d | 591 | // // !!!! without smearing |
592 | // hitForRec->SetBendingCoor(bendCoor); | |
593 | // hitForRec->SetNonBendingCoor(nonBendCoor); | |
a9e2aefa | 594 | // more information into HitForRec |
595 | // resolution: angular effect to be added here ???? | |
596 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
597 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
598 | // GEANT track info | |
599 | hitForRec->SetHitNumber(HitNumber); | |
600 | hitForRec->SetTHTrack(TrackNumber); | |
601 | hitForRec->SetGeantSignal(Signal); | |
602 | if (fPrintLevel >= 10) { | |
603 | cout << "track: " << TrackNumber << " hit: " << HitNumber << endl; | |
604 | Hit->Dump(); | |
605 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
606 | hitForRec->Dump();} | |
607 | return hitForRec; | |
608 | } | |
609 | ||
610 | //__________________________________________________________________________ | |
611 | void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber() | |
612 | { | |
613 | // Sort HitsForRec's in increasing order with respect to chamber number. | |
614 | // Uses the function "Compare". | |
615 | // Update the information for HitsForRec per chamber too. | |
616 | Int_t ch, nhits, prevch; | |
617 | fHitsForRecPtr->Sort(); | |
9cbdf048 | 618 | for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 619 | fNHitsForRecPerChamber[ch] = 0; |
620 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
621 | } | |
622 | prevch = 0; // previous chamber | |
623 | nhits = 0; // number of hits in current chamber | |
624 | // Loop over HitsForRec | |
625 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
626 | // chamber number (0...) | |
627 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
628 | // increment number of hits in current chamber | |
629 | (fNHitsForRecPerChamber[ch])++; | |
630 | // update index of first HitForRec in current chamber | |
631 | // if chamber number different from previous one | |
632 | if (ch != prevch) { | |
633 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
634 | prevch = ch; | |
635 | } | |
636 | } | |
637 | return; | |
638 | } | |
639 | ||
640 | // //__________________________________________________________________________ | |
641 | // void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC) | |
642 | // { | |
643 | // // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS | |
644 | // // To add to the list of hits for reconstruction | |
645 | // // the (cathode correlated) raw clusters | |
646 | // // No condition added, like in Fortran TRACKF_STAT, | |
647 | // // on the radius between RMin and RMax. | |
648 | // AliMUONHitForRec *hitForRec; | |
649 | // if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl; | |
650 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
651 | // // Security on MUON ???? | |
652 | // // Loop over tracking chambers | |
9cbdf048 | 653 | // for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 654 | // // number of HitsForRec to 0 for the chamber |
655 | // fNHitsForRecPerChamber[ch] = 0; | |
656 | // // index of first HitForRec for the chamber | |
657 | // if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
658 | // else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
659 | // TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch); | |
660 | // MUON->ResetReconstHits(); | |
661 | // TC->GetEvent(); | |
662 | // Int_t ncor = (Int_t)reconst_hits->GetEntries(); | |
663 | // // Loop over (cathode correlated) raw clusters | |
664 | // for (Int_t cor = 0; cor < ncor; cor++) { | |
665 | // AliMUONReconstHit * mCor = | |
666 | // (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor); | |
667 | // // new AliMUONHitForRec from (cathode correlated) raw cluster | |
668 | // // and increment number of AliMUONHitForRec's (total and in chamber) | |
669 | // hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor); | |
670 | // fNHitsForRec++; | |
671 | // (fNHitsForRecPerChamber[ch])++; | |
672 | // // more information into HitForRec | |
673 | // hitForRec->SetChamberNumber(ch); | |
674 | // hitForRec->SetHitNumber(cor); | |
675 | // // Z coordinate of the chamber (cm) with sign opposite to GEANT sign | |
676 | // // could (should) be more exact from chamber geometry ???? | |
677 | // hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z()); | |
678 | // if (fPrintLevel >= 10) { | |
679 | // cout << "chamber (0...): " << ch << | |
680 | // " cathcorrel (0...): " << cor << endl; | |
681 | // mCor->Dump(); | |
682 | // cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
683 | // hitForRec->Dump();} | |
684 | // } // end of cluster loop | |
685 | // } // end of chamber loop | |
686 | // return; | |
687 | // } | |
688 | ||
689 | //__________________________________________________________________________ | |
690 | void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR) | |
691 | { | |
692 | // To add to the list of hits for reconstruction all the raw clusters | |
693 | // No condition added, like in Fortran TRACKF_STAT, | |
694 | // on the radius between RMin and RMax. | |
695 | AliMUONHitForRec *hitForRec; | |
696 | AliMUONRawCluster *clus; | |
f69d51b5 | 697 | Int_t iclus, nclus, nTRentries; |
a9e2aefa | 698 | TClonesArray *rawclusters; |
699 | if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl; | |
88cb7938 | 700 | |
701 | TString evfoldname = AliConfig::fgkDefaultEventFolderName;//to be interfaced properly | |
702 | AliRunLoader* rl = AliRunLoader::GetRunLoader(evfoldname); | |
703 | if (rl == 0x0) | |
704 | { | |
705 | Error("MakeEventToBeReconstructed", | |
706 | "Can not find Run Loader in Event Folder named %s.", | |
707 | evfoldname.Data()); | |
708 | return; | |
709 | } | |
710 | AliLoader* gime = rl->GetLoader("MUONLoader"); | |
711 | if (gime == 0x0) | |
712 | { | |
713 | Error("MakeEventToBeReconstructed","Can not get MUON Loader from Run Loader."); | |
714 | return; | |
715 | } | |
716 | // Loading AliRun master | |
717 | rl->LoadgAlice(); | |
718 | gAlice = rl->GetAliRun(); | |
719 | ||
720 | // Loading MUON subsystem | |
721 | AliMUON * pMUON = (AliMUON *) gAlice->GetDetector("MUON"); | |
722 | ||
f69d51b5 | 723 | nTRentries = Int_t(TR->GetEntries()); |
724 | if (nTRentries != 1) { | |
725 | cout << "Error in AliMUONEventReconstructor::AddHitsForRecFromRawClusters" | |
726 | << endl; | |
727 | cout << "nTRentries = " << nTRentries << " not equal to 1" << endl; | |
728 | exit(0); | |
729 | } | |
88cb7938 | 730 | gime->TreeR()->GetEvent(0); // only one entry |
a9e2aefa | 731 | // Loop over tracking chambers |
9cbdf048 | 732 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 733 | // number of HitsForRec to 0 for the chamber |
734 | fNHitsForRecPerChamber[ch] = 0; | |
735 | // index of first HitForRec for the chamber | |
736 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
737 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
ce3f5e87 | 738 | rawclusters = pMUON->GetMUONData()->RawClusters(ch); |
f69d51b5 | 739 | // pMUON->ResetRawClusters(); |
740 | // TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ???? | |
a9e2aefa | 741 | nclus = (Int_t) (rawclusters->GetEntries()); |
742 | // Loop over (cathode correlated) raw clusters | |
743 | for (iclus = 0; iclus < nclus; iclus++) { | |
744 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); | |
745 | // new AliMUONHitForRec from raw cluster | |
746 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
747 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
748 | fNHitsForRec++; | |
749 | (fNHitsForRecPerChamber[ch])++; | |
750 | // more information into HitForRec | |
751 | // resolution: info should be already in raw cluster and taken from it ???? | |
752 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
753 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
754 | // original raw cluster | |
755 | hitForRec->SetChamberNumber(ch); | |
756 | hitForRec->SetHitNumber(iclus); | |
ba5b68db | 757 | // Z coordinate of the raw cluster (cm) |
cfe0107f | 758 | hitForRec->SetZ(clus->fZ[0]); |
a9e2aefa | 759 | if (fPrintLevel >= 10) { |
760 | cout << "chamber (0...): " << ch << | |
761 | " raw cluster (0...): " << iclus << endl; | |
762 | clus->Dump(); | |
763 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
764 | hitForRec->Dump();} | |
765 | } // end of cluster loop | |
766 | } // end of chamber loop | |
83dbc640 | 767 | SortHitsForRecWithIncreasingChamber(); //AZ |
a9e2aefa | 768 | return; |
769 | } | |
770 | ||
771 | //__________________________________________________________________________ | |
772 | void AliMUONEventReconstructor::MakeSegments(void) | |
773 | { | |
774 | // To make the list of segments in all stations, | |
775 | // from the list of hits to be reconstructed | |
776 | if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl; | |
777 | ResetSegments(); | |
778 | // Loop over stations | |
83dbc640 | 779 | Int_t nb = (fTrackMethod == 2) ? 3 : 0; //AZ |
780 | //AZ for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) | |
781 | for (Int_t st = nb; st < kMaxMuonTrackingStations; st++) //AZ | |
a9e2aefa | 782 | MakeSegmentsPerStation(st); |
783 | if (fPrintLevel >= 10) { | |
784 | cout << "end of MakeSegments" << endl; | |
9cbdf048 | 785 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 786 | cout << "station(0...): " << st |
787 | << " Segments: " << fNSegments[st] | |
788 | << endl; | |
789 | for (Int_t seg = 0; | |
790 | seg < fNSegments[st]; | |
791 | seg++) { | |
792 | cout << "Segment index(0...): " << seg << endl; | |
793 | ((*fSegmentsPtr[st])[seg])->Dump(); | |
794 | } | |
795 | } | |
796 | } | |
797 | return; | |
798 | } | |
799 | ||
800 | //__________________________________________________________________________ | |
801 | void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station) | |
802 | { | |
803 | // To make the list of segments in station number "Station" (0...) | |
804 | // from the list of hits to be reconstructed. | |
805 | // Updates "fNSegments"[Station]. | |
806 | // Segments in stations 4 and 5 are sorted | |
807 | // according to increasing absolute value of "impact parameter" | |
808 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
809 | AliMUONSegment *segment; | |
810 | Bool_t last2st; | |
811 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
d0bfce8d | 812 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. |
9cbdf048 | 813 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
a9e2aefa | 814 | if (fPrintLevel >= 1) |
815 | cout << "enter MakeSegmentsPerStation (0...) " << Station << endl; | |
816 | // first and second chambers (0...) in the station | |
817 | Int_t ch1 = 2 * Station; | |
818 | Int_t ch2 = ch1 + 1; | |
819 | // variable true for stations downstream of the dipole: | |
820 | // Station(0..4) equal to 3 or 4 | |
821 | if ((Station == 3) || (Station == 4)) { | |
822 | last2st = kTRUE; | |
823 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
824 | maxImpactParam = | |
825 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
d0bfce8d | 826 | // minimum impact parameter (cm) according to fMaxBendingMomentum... |
827 | minImpactParam = | |
828 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); | |
a9e2aefa | 829 | } |
830 | else last2st = kFALSE; | |
831 | // extrapolation factor from Z of first chamber to Z of second chamber | |
832 | // dZ to be changed to take into account fine structure of chambers ???? | |
833 | Double_t extrapFact = | |
9cbdf048 | 834 | (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z(); |
a9e2aefa | 835 | // index for current segment |
836 | Int_t segmentIndex = 0; | |
837 | // Loop over HitsForRec in the first chamber of the station | |
838 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
839 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
840 | hit1++) { | |
841 | // pointer to the HitForRec | |
842 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
843 | // extrapolation, | |
844 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
845 | // to the Z of the second chamber of the station | |
846 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
847 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
848 | // Loop over HitsForRec in the second chamber of the station | |
849 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
850 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
851 | hit2++) { | |
852 | // pointer to the HitForRec | |
853 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
854 | // absolute values of distances, in bending and non bending planes, | |
855 | // between the HitForRec in the second chamber | |
856 | // and the previous extrapolation | |
857 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); | |
858 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
859 | if (last2st) { | |
860 | // bending slope | |
861 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
862 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
863 | // absolute value of impact parameter | |
864 | impactParam = | |
31817925 | 865 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); |
a9e2aefa | 866 | } |
867 | // check for distances not too large, | |
868 | // and impact parameter not too big if stations downstream of the dipole. | |
869 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
870 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
871 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
d0bfce8d | 872 | (!last2st || (impactParam < maxImpactParam)) && |
873 | (!last2st || (impactParam > minImpactParam))) { | |
a9e2aefa | 874 | // make new segment |
875 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
876 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
877 | // update "link" to this segment from the hit in the first chamber | |
878 | if (hit1Ptr->GetNSegments() == 0) | |
879 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
880 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
881 | if (fPrintLevel >= 10) { | |
882 | cout << "segmentIndex(0...): " << segmentIndex | |
883 | << " distBend: " << distBend | |
884 | << " distNonBend: " << distNonBend | |
885 | << endl; | |
886 | segment->Dump(); | |
887 | cout << "HitForRec in first chamber" << endl; | |
888 | hit1Ptr->Dump(); | |
889 | cout << "HitForRec in second chamber" << endl; | |
890 | hit2Ptr->Dump(); | |
891 | }; | |
892 | // increment index for current segment | |
893 | segmentIndex++; | |
894 | } | |
895 | } //for (Int_t hit2 | |
896 | } // for (Int_t hit1... | |
897 | fNSegments[Station] = segmentIndex; | |
898 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
899 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
900 | // After this sorting, it is impossible to use | |
901 | // the "fNSegments" and "fIndexOfFirstSegment" | |
902 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
903 | // Is this sorting really needed ???? | |
904 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
905 | if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: " | |
906 | << fNSegments[Station] << endl; | |
907 | return; | |
908 | } | |
909 | ||
910 | //__________________________________________________________________________ | |
911 | void AliMUONEventReconstructor::MakeTracks(void) | |
912 | { | |
913 | // To make the tracks, | |
914 | // from the list of segments and points in all stations | |
915 | if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl; | |
8429a5e4 | 916 | // The order may be important for the following Reset's |
a9e2aefa | 917 | ResetTracks(); |
8429a5e4 | 918 | ResetTrackHits(); |
83dbc640 | 919 | if (fTrackMethod == 2) { //AZ - Kalman filter |
920 | MakeTrackCandidatesK(); | |
921 | // Follow tracks in stations(1..) 3, 2 and 1 | |
922 | FollowTracksK(); | |
923 | // Remove double tracks | |
924 | RemoveDoubleTracksK(); | |
925 | // Propagate tracks to the vertex thru absorber | |
926 | GoToVertex(); | |
927 | } else { //AZ | |
928 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
929 | MakeTrackCandidates(); | |
930 | // Follow tracks in stations(1..) 3, 2 and 1 | |
931 | FollowTracks(); | |
932 | // Remove double tracks | |
933 | RemoveDoubleTracks(); | |
934 | } | |
a9e2aefa | 935 | return; |
936 | } | |
937 | ||
938 | //__________________________________________________________________________ | |
939 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) | |
940 | { | |
941 | // To make track candidates with two segments in stations(1..) 4 and 5, | |
942 | // the first segment being pointed to by "BegSegment". | |
943 | // Returns the number of such track candidates. | |
944 | Int_t endStation, iEndSegment, nbCan2Seg; | |
945 | AliMUONSegment *endSegment, *extrapSegment; | |
946 | AliMUONTrack *recTrack; | |
947 | Double_t mcsFactor; | |
948 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl; | |
949 | // Station for the end segment | |
950 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
951 | // multiple scattering factor corresponding to one chamber | |
952 | mcsFactor = 0.0136 / | |
953 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
954 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
955 | // linear extrapolation to end station | |
956 | extrapSegment = | |
957 | BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor); | |
958 | // number of candidates with 2 segments to 0 | |
959 | nbCan2Seg = 0; | |
960 | // Loop over segments in the end station | |
961 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { | |
962 | // pointer to segment | |
963 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); | |
964 | // test compatibility between current segment and "extrapSegment" | |
04b5ea16 | 965 | // 4 because 4 quantities in chi2 |
a9e2aefa | 966 | if ((endSegment-> |
967 | NormalizedChi2WithSegment(extrapSegment, | |
968 | fMaxSigma2Distance)) <= 4.0) { | |
969 | // both segments compatible: | |
970 | // make track candidate from "begSegment" and "endSegment" | |
971 | if (fPrintLevel >= 2) | |
972 | cout << "TrackCandidate with Segment " << iEndSegment << | |
973 | " in Station(0..) " << endStation << endl; | |
974 | // flag for both segments in one track: | |
975 | // to be done in track constructor ???? | |
976 | BegSegment->SetInTrack(kTRUE); | |
977 | endSegment->SetInTrack(kTRUE); | |
978 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
979 | AliMUONTrack(BegSegment, endSegment, this); | |
980 | fNRecTracks++; | |
981 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
982 | // increment number of track candidates with 2 segments | |
983 | nbCan2Seg++; | |
984 | } | |
985 | } // for (iEndSegment = 0;... | |
986 | delete extrapSegment; // should not delete HitForRec's it points to !!!! | |
987 | return nbCan2Seg; | |
988 | } | |
989 | ||
990 | //__________________________________________________________________________ | |
991 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) | |
992 | { | |
993 | // To make track candidates with one segment and one point | |
994 | // in stations(1..) 4 and 5, | |
995 | // the segment being pointed to by "BegSegment". | |
996 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; | |
997 | AliMUONHitForRec *extrapHitForRec, *hit; | |
998 | AliMUONTrack *recTrack; | |
999 | Double_t mcsFactor; | |
1000 | if (fPrintLevel >= 1) | |
1001 | cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl; | |
1002 | // station for the end point | |
1003 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
1004 | // multiple scattering factor corresponding to one chamber | |
1005 | mcsFactor = 0.0136 / | |
1006 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
1007 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1008 | // first and second chambers(0..) in the end station | |
1009 | ch1 = 2 * endStation; | |
1010 | ch2 = ch1 + 1; | |
1011 | // number of candidates to 0 | |
1012 | nbCan1Seg1Hit = 0; | |
1013 | // Loop over chambers of the end station | |
1014 | for (ch = ch2; ch >= ch1; ch--) { | |
1015 | // linear extrapolation to chamber | |
1016 | extrapHitForRec = | |
1017 | BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor); | |
1018 | // limits for the hit index in the loop | |
1019 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; | |
1020 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; | |
1021 | // Loop over HitForRec's in the chamber | |
1022 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { | |
1023 | // pointer to HitForRec | |
1024 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
1025 | // test compatibility between current HitForRec and "extrapHitForRec" | |
04b5ea16 | 1026 | // 2 because 2 quantities in chi2 |
a9e2aefa | 1027 | if ((hit-> |
1028 | NormalizedChi2WithHitForRec(extrapHitForRec, | |
1029 | fMaxSigma2Distance)) <= 2.0) { | |
1030 | // both HitForRec's compatible: | |
1031 | // make track candidate from begSegment and current HitForRec | |
1032 | if (fPrintLevel >= 2) | |
1033 | cout << "TrackCandidate with HitForRec " << iHit << | |
1034 | " in Chamber(0..) " << ch << endl; | |
1035 | // flag for beginning segments in one track: | |
1036 | // to be done in track constructor ???? | |
1037 | BegSegment->SetInTrack(kTRUE); | |
1038 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
1039 | AliMUONTrack(BegSegment, hit, this); | |
1040 | // the right place to eliminate "double counting" ???? how ???? | |
1041 | fNRecTracks++; | |
1042 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
1043 | // increment number of track candidates | |
1044 | nbCan1Seg1Hit++; | |
1045 | } | |
1046 | } // for (iHit = iHitMin;... | |
1047 | delete extrapHitForRec; | |
1048 | } // for (ch = ch2;... | |
1049 | return nbCan1Seg1Hit; | |
1050 | } | |
1051 | ||
1052 | //__________________________________________________________________________ | |
1053 | void AliMUONEventReconstructor::MakeTrackCandidates(void) | |
1054 | { | |
1055 | // To make track candidates | |
1056 | // with at least 3 aligned points in stations(1..) 4 and 5 | |
1057 | // (two Segment's or one Segment and one HitForRec) | |
1058 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; | |
1059 | AliMUONSegment *begSegment; | |
1060 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl; | |
1061 | // Loop over stations(1..) 5 and 4 for the beginning segment | |
1062 | for (begStation = 4; begStation > 2; begStation--) { | |
1063 | // Loop over segments in the beginning station | |
1064 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { | |
1065 | // pointer to segment | |
1066 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); | |
1067 | if (fPrintLevel >= 2) | |
1068 | cout << "look for TrackCandidate's with Segment " << iBegSegment << | |
1069 | " in Station(0..) " << begStation << endl; | |
1070 | // Look for track candidates with two segments, | |
1071 | // "begSegment" and all compatible segments in other station. | |
1072 | // Only for beginning station(1..) 5 | |
1073 | // because candidates with 2 segments have to looked for only once. | |
1074 | if (begStation == 4) | |
1075 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); | |
956019b6 | 1076 | // Look for track candidates with one segment and one point, |
a9e2aefa | 1077 | // "begSegment" and all compatible HitForRec's in other station. |
1078 | // Only if "begSegment" does not belong already to a track candidate. | |
1079 | // Is that a too strong condition ???? | |
1080 | if (!(begSegment->GetInTrack())) | |
1081 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); | |
1082 | } // for (iBegSegment = 0;... | |
1083 | } // for (begStation = 4;... | |
1084 | return; | |
1085 | } | |
1086 | ||
1087 | //__________________________________________________________________________ | |
1088 | void AliMUONEventReconstructor::FollowTracks(void) | |
1089 | { | |
1090 | // Follow tracks in stations(1..) 3, 2 and 1 | |
04b5ea16 | 1091 | // too long: should be made more modular !!!! |
d0bfce8d | 1092 | AliMUONHitForRec *bestHit, *extrapHit, *extrapCorrHit, *hit; |
1093 | AliMUONSegment *bestSegment, *extrapSegment, *extrapCorrSegment, *segment; | |
04b5ea16 | 1094 | AliMUONTrack *track, *nextTrack; |
1095 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; | |
ecfa008b | 1096 | // -1 to avoid compilation warnings |
1097 | Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex; | |
04b5ea16 | 1098 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; |
d0bfce8d | 1099 | Double_t bendingMomentum, chi2Norm = 0.; |
9cbdf048 | 1100 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
04b5ea16 | 1101 | // local maxSigma2Distance, for easy increase in testing |
1102 | maxSigma2Distance = fMaxSigma2Distance; | |
a9e2aefa | 1103 | if (fPrintLevel >= 2) |
1104 | cout << "enter FollowTracks" << endl; | |
1105 | // Loop over track candidates | |
04b5ea16 | 1106 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1107 | trackIndex = -1; | |
1108 | while (track) { | |
1109 | // Follow function for each track candidate ???? | |
1110 | trackIndex++; | |
1111 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track | |
a9e2aefa | 1112 | if (fPrintLevel >= 2) |
1113 | cout << "FollowTracks: track candidate(0..): " << trackIndex << endl; | |
956019b6 | 1114 | // Fit track candidate |
1115 | track->SetFitMCS(0); // without multiple Coulomb scattering | |
1116 | track->SetFitNParam(3); // with 3 parameters (X = Y = 0) | |
1117 | track->SetFitStart(0); // from parameters at vertex | |
1118 | track->Fit(); | |
a9e2aefa | 1119 | if (fPrintLevel >= 10) { |
1120 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
956019b6 | 1121 | << " after fit in stations(0..) 3 and 4" << endl; |
a9e2aefa | 1122 | track->RecursiveDump(); |
1123 | } | |
1124 | // Loop over stations(1..) 3, 2 and 1 | |
04b5ea16 | 1125 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? |
1126 | // otherwise: majority coincidence 2 !!!! | |
a9e2aefa | 1127 | for (station = 2; station >= 0; station--) { |
1128 | // Track parameters at first track hit (smallest Z) | |
1129 | trackParam1 = ((AliMUONTrackHit*) | |
1130 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1131 | // extrapolation to station | |
1132 | trackParam1->ExtrapToStation(station, trackParam); | |
79e1e601 | 1133 | extrapSegment = new AliMUONSegment(); // empty segment |
d0bfce8d | 1134 | extrapCorrSegment = new AliMUONSegment(); // empty corrected segment |
a9e2aefa | 1135 | // multiple scattering factor corresponding to one chamber |
1136 | // and momentum in bending plane (not total) | |
1137 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); | |
1138 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1139 | // Z difference from previous station | |
9cbdf048 | 1140 | dZ1 = (&(pMUON->Chamber(2 * station)))->Z() - |
1141 | (&(pMUON->Chamber(2 * station + 2)))->Z(); | |
a9e2aefa | 1142 | // Z difference between the two previous stations |
9cbdf048 | 1143 | dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() - |
1144 | (&(pMUON->Chamber(2 * station + 4)))->Z(); | |
04b5ea16 | 1145 | // Z difference between the two chambers in the previous station |
1146 | dZ3 = (&(pMUON->Chamber(2 * station)))->Z() - | |
1147 | (&(pMUON->Chamber(2 * station + 1)))->Z(); | |
1148 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1149 | extrapSegment-> | |
1150 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1151 | extrapSegment->UpdateFromStationTrackParam | |
1152 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1153 | trackParam1->GetInverseBendingMomentum()); | |
d0bfce8d | 1154 | // same thing for corrected segment |
1155 | // better to use copy constructor, after checking that it works properly !!!! | |
1156 | extrapCorrSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1157 | extrapCorrSegment-> | |
1158 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1159 | extrapCorrSegment->UpdateFromStationTrackParam | |
1160 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1161 | trackParam1->GetInverseBendingMomentum()); | |
a9e2aefa | 1162 | bestChi2 = 5.0; |
1163 | bestSegment = NULL; | |
1164 | if (fPrintLevel >= 10) { | |
1165 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1166 | << " Look for segment in station(0..): " << station << endl; | |
1167 | } | |
1168 | // Loop over segments in station | |
1169 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { | |
1170 | // Look for best compatible Segment in station | |
1171 | // should consider all possibilities ???? | |
1172 | // multiple scattering ???? | |
1173 | // separation in 2 functions: Segment and HitForRec ???? | |
1174 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); | |
d0bfce8d | 1175 | // correction of corrected segment (fBendingCoor and fNonBendingCoor) |
1176 | // according to real Z value of "segment" and slopes of "extrapSegment" | |
1177 | extrapCorrSegment-> | |
1178 | SetBendingCoor(extrapSegment->GetBendingCoor() + | |
1179 | extrapSegment->GetBendingSlope() * | |
1180 | (segment->GetHitForRec1()->GetZ() - | |
1181 | (&(pMUON->Chamber(2 * station)))->Z())); | |
1182 | extrapCorrSegment-> | |
1183 | SetNonBendingCoor(extrapSegment->GetNonBendingCoor() + | |
1184 | extrapSegment->GetNonBendingSlope() * | |
1185 | (segment->GetHitForRec1()->GetZ() - | |
1186 | (&(pMUON->Chamber(2 * station)))->Z())); | |
1187 | chi2 = segment-> | |
1188 | NormalizedChi2WithSegment(extrapCorrSegment, maxSigma2Distance); | |
a9e2aefa | 1189 | if (chi2 < bestChi2) { |
1190 | // update best Chi2 and Segment if better found | |
1191 | bestSegment = segment; | |
1192 | bestChi2 = chi2; | |
1193 | } | |
1194 | } | |
1195 | if (bestSegment) { | |
1196 | // best segment found: add it to track candidate | |
1197 | track->AddSegment(bestSegment); | |
1198 | // set track parameters at these two TrakHit's | |
1199 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); | |
1200 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); | |
1201 | if (fPrintLevel >= 10) { | |
1202 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1203 | << " Added segment in station(0..): " << station << endl; | |
1204 | track->RecursiveDump(); | |
1205 | } | |
1206 | } | |
1207 | else { | |
1208 | // No best segment found: | |
1209 | // Look for best compatible HitForRec in station: | |
1210 | // should consider all possibilities ???? | |
1211 | // multiple scattering ???? do about like for extrapSegment !!!! | |
79e1e601 | 1212 | extrapHit = new AliMUONHitForRec(); // empty hit |
d0bfce8d | 1213 | extrapCorrHit = new AliMUONHitForRec(); // empty corrected hit |
a9e2aefa | 1214 | bestChi2 = 3.0; |
1215 | bestHit = NULL; | |
1216 | if (fPrintLevel >= 10) { | |
1217 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1218 | << " Segment not found, look for hit in station(0..): " << station | |
1219 | << endl; | |
1220 | } | |
1221 | // Loop over chambers of the station | |
d82671a0 | 1222 | for (chInStation = 0; chInStation < 2; chInStation++) { |
a9e2aefa | 1223 | // coordinates of extrapolated hit |
d82671a0 | 1224 | extrapHit-> |
1225 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1226 | extrapHit-> | |
1227 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
a9e2aefa | 1228 | // resolutions from "extrapSegment" |
1229 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1230 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
d0bfce8d | 1231 | // same things for corrected hit |
1232 | // better to use copy constructor, after checking that it works properly !!!! | |
1233 | extrapCorrHit-> | |
1234 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1235 | extrapCorrHit-> | |
1236 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
1237 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1238 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
a9e2aefa | 1239 | // Loop over hits in the chamber |
956019b6 | 1240 | ch = 2 * station + chInStation; |
a9e2aefa | 1241 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; |
1242 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + | |
1243 | fNHitsForRecPerChamber[ch]; | |
1244 | iHit++) { | |
1245 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
d0bfce8d | 1246 | // correction of corrected hit (fBendingCoor and fNonBendingCoor) |
1247 | // according to real Z value of "hit" and slopes of right "trackParam" | |
1248 | extrapCorrHit-> | |
1249 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor() + | |
1250 | (&(trackParam[chInStation]))->GetBendingSlope() * | |
1251 | (hit->GetZ() - | |
1252 | (&(trackParam[chInStation]))->GetZ())); | |
1253 | extrapCorrHit-> | |
1254 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor() + | |
1255 | (&(trackParam[chInStation]))->GetNonBendingSlope() * | |
1256 | (hit->GetZ() - | |
1257 | (&(trackParam[chInStation]))->GetZ())); | |
a9e2aefa | 1258 | // condition for hit not already in segment ???? |
1259 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); | |
1260 | if (chi2 < bestChi2) { | |
1261 | // update best Chi2 and HitForRec if better found | |
1262 | bestHit = hit; | |
1263 | bestChi2 = chi2; | |
d82671a0 | 1264 | chBestHit = chInStation; |
a9e2aefa | 1265 | } |
1266 | } | |
1267 | } | |
1268 | if (bestHit) { | |
1269 | // best hit found: add it to track candidate | |
1270 | track->AddHitForRec(bestHit); | |
956019b6 | 1271 | // set track parameters at this TrackHit |
a9e2aefa | 1272 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, |
1273 | &(trackParam[chBestHit])); | |
1274 | if (fPrintLevel >= 10) { | |
1275 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1276 | << " Added hit in station(0..): " << station << endl; | |
1277 | track->RecursiveDump(); | |
1278 | } | |
1279 | } | |
1280 | else { | |
8429a5e4 | 1281 | // Remove current track candidate |
1282 | // and corresponding TrackHit's, ... | |
1283 | track->Remove(); | |
04b5ea16 | 1284 | delete extrapSegment; |
d0bfce8d | 1285 | delete extrapCorrSegment; |
1286 | delete extrapHit; | |
1287 | delete extrapCorrHit; | |
a9e2aefa | 1288 | break; // stop the search for this candidate: |
1289 | // exit from the loop over station | |
1290 | } | |
d0bfce8d | 1291 | delete extrapHit; |
1292 | delete extrapCorrHit; | |
a9e2aefa | 1293 | } |
04b5ea16 | 1294 | delete extrapSegment; |
d0bfce8d | 1295 | delete extrapCorrSegment; |
a9e2aefa | 1296 | // Sort track hits according to increasing Z |
1297 | track->GetTrackHitsPtr()->Sort(); | |
1298 | // Update track parameters at first track hit (smallest Z) | |
1299 | trackParam1 = ((AliMUONTrackHit*) | |
1300 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
d0bfce8d | 1301 | bendingMomentum = 0.; |
1302 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.) | |
1303 | bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum())); | |
1304 | // Track removed if bendingMomentum not in window [min, max] | |
1305 | if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) { | |
1306 | track->Remove(); | |
1307 | break; // stop the search for this candidate: | |
1308 | // exit from the loop over station | |
1309 | } | |
956019b6 | 1310 | // Track fit |
04b5ea16 | 1311 | // with multiple Coulomb scattering if all stations |
1312 | if (station == 0) track->SetFitMCS(1); | |
956019b6 | 1313 | // without multiple Coulomb scattering if not all stations |
04b5ea16 | 1314 | else track->SetFitMCS(0); |
956019b6 | 1315 | track->SetFitNParam(5); // with 5 parameters (momentum and position) |
1316 | track->SetFitStart(1); // from parameters at first hit | |
1317 | track->Fit(); | |
d0bfce8d | 1318 | Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5); |
1319 | if (numberOfDegFree > 0) { | |
1320 | chi2Norm = track->GetFitFMin() / numberOfDegFree; | |
1321 | } else { | |
1322 | chi2Norm = 1.e10; | |
1323 | } | |
1324 | // Track removed if normalized chi2 too high | |
1325 | if (chi2Norm > fMaxChi2) { | |
1326 | track->Remove(); | |
1327 | break; // stop the search for this candidate: | |
1328 | // exit from the loop over station | |
1329 | } | |
a9e2aefa | 1330 | if (fPrintLevel >= 10) { |
1331 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1332 | << " after fit from station(0..): " << station << " to 4" << endl; | |
1333 | track->RecursiveDump(); | |
1334 | } | |
04b5ea16 | 1335 | // Track extrapolation to the vertex through the absorber (Branson) |
956019b6 | 1336 | // after going through the first station |
04b5ea16 | 1337 | if (station == 0) { |
1338 | trackParamVertex = *trackParam1; | |
1339 | (&trackParamVertex)->ExtrapToVertex(); | |
1340 | track->SetTrackParamAtVertex(&trackParamVertex); | |
6ae236ee | 1341 | if (fPrintLevel >= 1) { |
1342 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1343 | << " after extrapolation to vertex" << endl; | |
1344 | track->RecursiveDump(); | |
1345 | } | |
04b5ea16 | 1346 | } |
a9e2aefa | 1347 | } // for (station = 2;... |
04b5ea16 | 1348 | // go really to next track |
1349 | track = nextTrack; | |
1350 | } // while (track) | |
1351 | // Compression of track array (necessary after Remove ????) | |
1352 | fRecTracksPtr->Compress(); | |
1353 | return; | |
1354 | } | |
1355 | ||
1356 | //__________________________________________________________________________ | |
8429a5e4 | 1357 | void AliMUONEventReconstructor::RemoveDoubleTracks(void) |
1358 | { | |
1359 | // To remove double tracks. | |
1360 | // Tracks are considered identical | |
1361 | // if they have at least half of their hits in common. | |
1362 | // Among two identical tracks, one keeps the track with the larger number of hits | |
1363 | // or, if these numbers are equal, the track with the minimum Chi2. | |
1364 | AliMUONTrack *track1, *track2, *trackToRemove; | |
1365 | Bool_t identicalTracks; | |
1366 | Int_t hitsInCommon, nHits1, nHits2; | |
1367 | identicalTracks = kTRUE; | |
1368 | while (identicalTracks) { | |
1369 | identicalTracks = kFALSE; | |
1370 | // Loop over first track of the pair | |
1371 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
1372 | while (track1 && (!identicalTracks)) { | |
1373 | nHits1 = track1->GetNTrackHits(); | |
1374 | // Loop over second track of the pair | |
1375 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1376 | while (track2 && (!identicalTracks)) { | |
1377 | nHits2 = track2->GetNTrackHits(); | |
1378 | // number of hits in common between two tracks | |
1379 | hitsInCommon = track1->HitsInCommon(track2); | |
1380 | // check for identical tracks | |
1381 | if ((4 * hitsInCommon) >= (nHits1 + nHits2)) { | |
1382 | identicalTracks = kTRUE; | |
1383 | // decide which track to remove | |
1384 | if (nHits1 > nHits2) trackToRemove = track2; | |
1385 | else if (nHits1 < nHits2) trackToRemove = track1; | |
1386 | else if ((track1->GetFitFMin()) < (track2->GetFitFMin())) | |
1387 | trackToRemove = track2; | |
1388 | else trackToRemove = track1; | |
1389 | // remove it | |
1390 | trackToRemove->Remove(); | |
1391 | } | |
1392 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
1393 | } // track2 | |
1394 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1395 | } // track1 | |
1396 | } | |
1397 | return; | |
1398 | } | |
1399 | ||
1400 | //__________________________________________________________________________ | |
04b5ea16 | 1401 | void AliMUONEventReconstructor::EventDump(void) |
1402 | { | |
1403 | // Dump reconstructed event (track parameters at vertex and at first hit), | |
1404 | // and the particle parameters | |
1405 | ||
1406 | AliMUONTrack *track; | |
1407 | AliMUONTrackParam *trackParam, *trackParam1; | |
04b5ea16 | 1408 | Double_t bendingSlope, nonBendingSlope, pYZ; |
1409 | Double_t pX, pY, pZ, x, y, z, c; | |
1410 | Int_t np, trackIndex, nTrackHits; | |
1411 | ||
1412 | if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl; | |
1413 | if (fPrintLevel >= 1) { | |
1414 | cout << " Number of Reconstructed tracks :" << fNRecTracks << endl; | |
1415 | } | |
1416 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole | |
1417 | // Loop over reconstructed tracks | |
1418 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { | |
83dbc640 | 1419 | if (fTrackMethod != 1) continue; //AZ - skip the rest for now |
04b5ea16 | 1420 | if (fPrintLevel >= 1) |
1421 | cout << " track number: " << trackIndex << endl; | |
1422 | // function for each track for modularity ???? | |
1423 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); | |
1424 | nTrackHits = track->GetNTrackHits(); | |
1425 | if (fPrintLevel >= 1) | |
1426 | cout << " number of track hits: " << nTrackHits << endl; | |
1427 | // track parameters at Vertex | |
1428 | trackParam = track->GetTrackParamAtVertex(); | |
1429 | x = trackParam->GetNonBendingCoor(); | |
1430 | y = trackParam->GetBendingCoor(); | |
1431 | z = trackParam->GetZ(); | |
1432 | bendingSlope = trackParam->GetBendingSlope(); | |
1433 | nonBendingSlope = trackParam->GetNonBendingSlope(); | |
1434 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); | |
1435 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); | |
1436 | pX = pZ * nonBendingSlope; | |
1437 | pY = pZ * bendingSlope; | |
1438 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); | |
1439 | if (fPrintLevel >= 1) | |
1440 | printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1441 | z, x, y, pX, pY, pZ, c); | |
1442 | ||
1443 | // track parameters at first hit | |
1444 | trackParam1 = ((AliMUONTrackHit*) | |
1445 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1446 | x = trackParam1->GetNonBendingCoor(); | |
1447 | y = trackParam1->GetBendingCoor(); | |
1448 | z = trackParam1->GetZ(); | |
1449 | bendingSlope = trackParam1->GetBendingSlope(); | |
1450 | nonBendingSlope = trackParam1->GetNonBendingSlope(); | |
1451 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); | |
1452 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); | |
1453 | pX = pZ * nonBendingSlope; | |
1454 | pY = pZ * bendingSlope; | |
1455 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); | |
1456 | if (fPrintLevel >= 1) | |
1457 | printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1458 | z, x, y, pX, pY, pZ, c); | |
1459 | } | |
1460 | // informations about generated particles | |
5d12ce38 | 1461 | np = gAlice->GetMCApp()->GetNtrack(); |
04b5ea16 | 1462 | printf(" **** number of generated particles: %d \n", np); |
1463 | ||
88cb7938 | 1464 | // for (Int_t iPart = 0; iPart < np; iPart++) { |
1465 | // p = gAlice->Particle(iPart); | |
1466 | // printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", | |
1467 | // iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); | |
1468 | // } | |
a9e2aefa | 1469 | return; |
1470 | } | |
1471 | ||
c7ba256d | 1472 | void AliMUONEventReconstructor::FillEvent() |
1473 | { | |
1474 | // Create a new AliMUONRecoEvent, fill its track list, then add it as a | |
1475 | // leaf in the Event branch of TreeRecoEvent tree | |
1476 | cout << "Enter FillEvent() ...\n"; | |
1477 | ||
1478 | if (!fRecoEvent) { | |
1479 | fRecoEvent = new AliMUONRecoEvent(); | |
1480 | } else { | |
1481 | fRecoEvent->Clear(); | |
1482 | } | |
1483 | //save current directory | |
1484 | TDirectory *current = gDirectory; | |
1485 | if (!fTreeFile) fTreeFile = new TFile("tree_reco.root", "RECREATE"); | |
1486 | if (!fEventTree) fEventTree = new TTree("TreeRecoEvent", "MUON reconstructed events"); | |
83dbc640 | 1487 | //AZif (fRecoEvent->MakeDumpTracks(fRecTracksPtr)) { |
1488 | if (fRecoEvent->MakeDumpTracks(fMuons, fRecTracksPtr, this)) { //AZ | |
c7ba256d | 1489 | if (fPrintLevel > 1) fRecoEvent->EventInfo(); |
1490 | TBranch *branch = fEventTree->GetBranch("Event"); | |
d0f40f23 | 1491 | if (!branch) branch = fEventTree->Branch("Event", "AliMUONRecoEvent", &fRecoEvent, 64000); |
c7ba256d | 1492 | branch->SetAutoDelete(); |
1493 | fTreeFile->cd(); | |
1494 | fEventTree->Fill(); | |
1495 | fTreeFile->Write(); | |
1496 | } | |
1497 | // restore directory | |
1498 | current->cd(); | |
1499 | } | |
83dbc640 | 1500 | |
1501 | //__________________________________________________________________________ | |
1502 | void AliMUONEventReconstructor::MakeTrackCandidatesK(void) | |
1503 | { | |
1504 | // To make initial tracks for Kalman filter from the list of segments | |
1505 | Int_t istat, iseg; | |
1506 | AliMUONSegment *segment; | |
1507 | AliMUONTrackK *trackK; | |
1508 | ||
1509 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesK" << endl; | |
1510 | // Reset the TClonesArray of reconstructed tracks | |
1511 | if (fRecTracksPtr) fRecTracksPtr->Delete(); | |
1512 | // Delete in order that the Track destructors are called, | |
1513 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
1514 | fNRecTracks = 0; | |
1515 | ||
1516 | AliMUONTrackK a(this, fHitsForRecPtr); // bad idea ??? | |
1517 | // Loop over stations(1...) 5 and 4 | |
1518 | for (istat=4; istat>=3; istat--) { | |
1519 | // Loop over segments in the station | |
1520 | for (iseg=0; iseg<fNSegments[istat]; iseg++) { | |
1521 | // Transform segments to tracks and evaluate covariance matrix | |
1522 | segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]); | |
1523 | trackK = new ((*fRecTracksPtr)[fNRecTracks]) AliMUONTrackK(segment); | |
1524 | fNRecTracks++; | |
1525 | } // for (iseg=0;...) | |
1526 | } // for (istat=4;...) | |
1527 | return; | |
1528 | } | |
1529 | ||
1530 | //__________________________________________________________________________ | |
1531 | void AliMUONEventReconstructor::FollowTracksK(void) | |
1532 | { | |
1533 | // Follow tracks using Kalman filter | |
1534 | Bool_t Ok; | |
1535 | Int_t icand, ichamBeg, ichamEnd, chamBits; | |
1536 | Double_t zDipole1, zDipole2; | |
1537 | AliMUONTrackK *trackK; | |
1538 | AliMUONHitForRec *hit; | |
1539 | AliMUONRawCluster *clus; | |
1540 | TClonesArray *rawclusters; | |
1541 | AliMUON *pMUON; | |
1542 | clus = 0; rawclusters = 0; | |
1543 | ||
1544 | zDipole1 = GetSimpleBPosition() - GetSimpleBLength()/2; | |
1545 | zDipole2 = zDipole1 + GetSimpleBLength(); | |
1546 | ||
1547 | // Print hits | |
1548 | pMUON = (AliMUON*) gAlice->GetModule("MUON"); | |
1549 | for (Int_t i1=0; i1<fNHitsForRec; i1++) { | |
1550 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]); | |
1551 | //if (hit->GetTHTrack() > 1 || hit->GetGeantSignal() == 0) continue; | |
1552 | /* | |
1553 | cout << " Hit #" << hit->GetChamberNumber() << " "; | |
1554 | cout << hit->GetBendingCoor() << " "; | |
1555 | cout << hit->GetNonBendingCoor() << " "; | |
1556 | cout << hit->GetZ() << " "; | |
1557 | cout << hit->GetGeantSignal() << " "; | |
1558 | cout << hit->GetTHTrack() << endl; | |
1559 | */ | |
1560 | /* | |
1561 | printf(" Hit # %d %10.4f %10.4f %10.4f", | |
1562 | hit->GetChamberNumber(), hit->GetBendingCoor(), | |
1563 | hit->GetNonBendingCoor(), hit->GetZ()); | |
1564 | if (fRecGeantHits) { | |
1565 | // from GEANT hits | |
1566 | printf(" %3d %3d \n", hit->GetGeantSignal(), hit->GetTHTrack()); | |
1567 | } else { | |
1568 | // from raw clusters | |
1569 | rawclusters = pMUON->RawClustAddress(hit->GetChamberNumber()); | |
1570 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit-> | |
1571 | GetHitNumber()); | |
1572 | printf("%3d", clus->fTracks[1]-1); | |
1573 | if (clus->fTracks[2] != 0) printf("%3d \n", clus->fTracks[2]-1); | |
1574 | else printf("\n"); | |
1575 | } | |
1576 | */ | |
1577 | } | |
1578 | ||
1579 | icand = -1; | |
1580 | Int_t nSeeds = fNRecTracks; // starting number of seeds | |
1581 | // Loop over track candidates | |
1582 | while (icand < fNRecTracks-1) { | |
1583 | icand ++; | |
1584 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1585 | ||
1586 | // Discard candidate which will produce the double track | |
1587 | if (icand > 0) { | |
1588 | Ok = CheckCandidateK(icand,nSeeds); | |
1589 | if (!Ok) { | |
1590 | //trackK->SetRecover(-1); // mark candidate to be removed | |
1591 | //continue; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | Ok = kTRUE; | |
1596 | if (trackK->GetRecover() == 0) hit = (AliMUONHitForRec*) | |
1597 | trackK->GetHitOnTrack()->Last(); // last hit | |
1598 | else hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[1]; // 2'nd hit | |
1599 | ichamBeg = hit->GetChamberNumber(); | |
1600 | ichamEnd = 0; | |
1601 | // Check propagation direction | |
1602 | if (trackK->GetTrackDir() > 0) { | |
1603 | ichamEnd = 9; // forward propagation | |
1604 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1605 | if (Ok) { | |
1606 | ichamBeg = ichamEnd; | |
1607 | ichamEnd = 6; // backward propagation | |
1608 | // Change weight matrix and zero fChi2 for backpropagation | |
1609 | trackK->StartBack(); | |
1610 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1611 | ichamBeg = ichamEnd; | |
1612 | ichamEnd = 0; | |
1613 | } | |
1614 | } else { | |
1615 | if (trackK->GetBPFlag()) { | |
1616 | // backpropagation | |
1617 | ichamEnd = 6; // backward propagation | |
1618 | // Change weight matrix and zero fChi2 for backpropagation | |
1619 | trackK->StartBack(); | |
1620 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); | |
1621 | ichamBeg = ichamEnd; | |
1622 | ichamEnd = 0; | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | if (Ok) { | |
1627 | trackK->SetTrackDir(-1); | |
1628 | trackK->SetBPFlag(kFALSE); | |
1629 | Ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); | |
1630 | } | |
1631 | if (Ok) trackK->SetTrackQuality(0); // compute "track quality" | |
1632 | else trackK->SetRecover(-1); // mark candidate to be removed | |
1633 | ||
1634 | // Majority 3 of 4 in first 2 stations | |
1635 | chamBits = 0; | |
1636 | for (Int_t i=0; i<trackK->GetNTrackHits(); i++) { | |
1637 | hit = (AliMUONHitForRec*) (*trackK->GetHitOnTrack())[i]; | |
1638 | chamBits |= BIT(hit->GetChamberNumber()-1); | |
1639 | } | |
1640 | //if (!((chamBits&3)==3 || (chamBits>>2&3)==3)) trackK->SetRecover(-1); | |
1641 | //mark candidate to be removed | |
1642 | } // while | |
1643 | ||
1644 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1645 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1646 | if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i); | |
1647 | } | |
1648 | ||
1649 | // Compress TClonesArray | |
1650 | fRecTracksPtr->Compress(); | |
1651 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1652 | return; | |
1653 | } | |
1654 | ||
1655 | //__________________________________________________________________________ | |
1656 | Bool_t AliMUONEventReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) | |
1657 | { | |
1658 | // Discards track candidate if it will produce the double track (having | |
1659 | // the same seed segment hits as hits of a good track found before) | |
1660 | AliMUONTrackK *track1, *track2; | |
1661 | AliMUONHitForRec *hit1, *hit2, *hit; | |
1662 | ||
1663 | track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
1664 | hit1 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[0]; // 1'st hit | |
1665 | hit2 = (AliMUONHitForRec*) (*track1->GetHitOnTrack())[1]; // 2'nd hit | |
1666 | ||
1667 | for (Int_t i=0; i<icand; i++) { | |
1668 | track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1669 | //if (track2->GetRecover() < 0) continue; | |
1670 | if (track2->GetRecover() < 0 && icand >= nSeeds) continue; | |
1671 | ||
1672 | if (track1->GetStartSegment() == track2->GetStartSegment()) { | |
1673 | return kFALSE; | |
1674 | } else { | |
1675 | Int_t nSame = 0; | |
1676 | for (Int_t j=0; j<track2->GetNTrackHits(); j++) { | |
1677 | hit = (AliMUONHitForRec*) (*track2->GetHitOnTrack())[j]; | |
1678 | if (hit == hit1 || hit == hit2) { | |
1679 | nSame++; | |
1680 | if (nSame == 2) return kFALSE; | |
1681 | } | |
1682 | } // for (Int_t j=0; | |
1683 | } | |
1684 | } // for (Int_t i=0; | |
1685 | return kTRUE; | |
1686 | } | |
1687 | ||
1688 | //__________________________________________________________________________ | |
1689 | void AliMUONEventReconstructor::RemoveDoubleTracksK(void) | |
1690 | { | |
1691 | // Removes double tracks (sharing more than half of their hits). Keeps | |
1692 | // the track with higher quality | |
1693 | AliMUONTrackK *track1, *track2, *trackToKill; | |
1694 | ||
1695 | // Sort tracks according to their quality | |
1696 | fRecTracksPtr->Sort(); | |
1697 | ||
1698 | // Loop over first track of the pair | |
1699 | track1 = (AliMUONTrackK*) fRecTracksPtr->First(); | |
1700 | while (track1) { | |
1701 | // Loop over second track of the pair | |
1702 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1703 | while (track2) { | |
1704 | // Check whether or not to keep track2 | |
1705 | if (!track2->KeepTrack(track1)) { | |
1706 | cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) << | |
1707 | " " << track2->GetTrackQuality() << endl; | |
1708 | trackToKill = track2; | |
1709 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1710 | trackToKill->Kill(); | |
1711 | fRecTracksPtr->Compress(); | |
1712 | } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1713 | } // track2 | |
1714 | track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1715 | } // track1 | |
1716 | ||
1717 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1718 | cout << " Number of Kalman tracks: " << fNRecTracks << endl; | |
1719 | } | |
1720 | ||
1721 | //__________________________________________________________________________ | |
1722 | void AliMUONEventReconstructor::GoToVertex(void) | |
1723 | { | |
1724 | // Propagates track to the vertex thru absorber | |
1725 | // (using Branson correction for now) | |
1726 | ||
1727 | Double_t zVertex; | |
1728 | zVertex = 0; | |
1729 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1730 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson(); | |
1731 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber | |
1732 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2 | |
1733 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(); // with absorber | |
1734 | } | |
1735 | } |