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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 | ||
cc87ebcd | 16 | /* $Id$ */ |
17 | ||
3831f268 | 18 | //////////////////////////////////// |
a9e2aefa | 19 | // |
29f1b13a | 20 | // MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) |
a9e2aefa | 21 | // |
22 | // This class contains as data: | |
29f1b13a | 23 | // * the parameters for the track reconstruction |
a9e2aefa | 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 | |
ae17f568 | 35 | #include <stdlib.h> |
30178c30 | 36 | #include <Riostream.h> |
37 | #include <TDirectory.h> | |
38 | #include <TFile.h> | |
cc87ebcd | 39 | #include <TMatrixD.h> |
a9e2aefa | 40 | |
29f1b13a | 41 | #include "AliMUONTrackReconstructor.h" |
5e671e06 | 42 | #include "AliMUONData.h" |
29fc2c86 | 43 | #include "AliMUONConstants.h" |
a9e2aefa | 44 | #include "AliMUONHitForRec.h" |
276c44b7 | 45 | #include "AliMUONTriggerTrack.h" |
bc4a7ff4 | 46 | #include "AliMUONTriggerCircuitNew.h" |
a9e2aefa | 47 | #include "AliMUONRawCluster.h" |
276c44b7 | 48 | #include "AliMUONLocalTrigger.h" |
52c9bc11 | 49 | #include "AliMUONGlobalTrigger.h" |
3831f268 | 50 | #include "AliMUONSegment.h" |
a9e2aefa | 51 | #include "AliMUONTrack.h" |
a9e2aefa | 52 | #include "AliMUONTrackHit.h" |
94de3818 | 53 | #include "AliMagF.h" |
cc87ebcd | 54 | #include "AliMUONTrackK.h" |
8c343c7c | 55 | #include "AliLog.h" |
1a38e749 | 56 | #include "AliTracker.h" |
a9e2aefa | 57 | |
a9e2aefa | 58 | //************* Defaults parameters for reconstruction |
29f1b13a | 59 | const Double_t AliMUONTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0; |
7b96283c | 60 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxBendingMomentum = 3000.0; |
29f1b13a | 61 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxChi2 = 100.0; |
62 | const Double_t AliMUONTrackReconstructor::fgkDefaultMaxSigma2Distance = 16.0; | |
63 | const Double_t AliMUONTrackReconstructor::fgkDefaultBendingResolution = 0.01; | |
64 | const Double_t AliMUONTrackReconstructor::fgkDefaultNonBendingResolution = 0.144; | |
65 | const Double_t AliMUONTrackReconstructor::fgkDefaultChamberThicknessInX0 = 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 ???? | |
29f1b13a | 72 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBValue = 7.0; |
73 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBLength = 428.0; | |
74 | const Double_t AliMUONTrackReconstructor::fgkDefaultSimpleBPosition = 1019.0; | |
29f1b13a | 75 | const Double_t AliMUONTrackReconstructor::fgkDefaultEfficiency = 0.95; |
a9e2aefa | 76 | |
29f1b13a | 77 | ClassImp(AliMUONTrackReconstructor) // Class implementation in ROOT context |
a9e2aefa | 78 | |
3bc8b580 | 79 | //__________________________________________________________________________ |
cc9e7528 | 80 | AliMUONTrackReconstructor::AliMUONTrackReconstructor(AliMUONData* data) |
54d7ba50 | 81 | : TObject(), |
82 | fTrackMethod(1), //AZ - tracking method (1-default, 2-Kalman) | |
83 | fMinBendingMomentum(fgkDefaultMinBendingMomentum), | |
84 | fMaxBendingMomentum(fgkDefaultMaxBendingMomentum), | |
85 | fMaxChi2(fgkDefaultMaxChi2), | |
86 | fMaxSigma2Distance(fgkDefaultMaxSigma2Distance), | |
87 | fBendingResolution(fgkDefaultBendingResolution), | |
88 | fNonBendingResolution(fgkDefaultNonBendingResolution), | |
89 | fChamberThicknessInX0(fgkDefaultChamberThicknessInX0), | |
90 | fSimpleBValue(fgkDefaultSimpleBValue), | |
91 | fSimpleBLength(fgkDefaultSimpleBLength), | |
92 | fSimpleBPosition(fgkDefaultSimpleBPosition), | |
54d7ba50 | 93 | fEfficiency(fgkDefaultEfficiency), |
54d7ba50 | 94 | fHitsForRecPtr(0x0), |
95 | fNHitsForRec(0), | |
96 | fRecTracksPtr(0x0), | |
97 | fNRecTracks(0), | |
98 | fRecTrackHitsPtr(0x0), | |
99 | fNRecTrackHits(0), | |
100 | fMUONData(data), | |
58ff0bd4 | 101 | fMuons(0), |
5e671e06 | 102 | fTriggerTrack(new AliMUONTriggerTrack()), |
103 | fTriggerCircuit(0x0) | |
a9e2aefa | 104 | { |
29f1b13a | 105 | // Constructor for class AliMUONTrackReconstructor |
a9e2aefa | 106 | SetReconstructionParametersToDefaults(); |
54d7ba50 | 107 | |
a9e2aefa | 108 | // Memory allocation for the TClonesArray of hits for reconstruction |
109 | // Is 10000 the right size ???? | |
110 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
54d7ba50 | 111 | |
a9e2aefa | 112 | // Memory allocation for the TClonesArray's of segments in stations |
113 | // Is 2000 the right size ???? | |
190f97ea | 114 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
a9e2aefa | 115 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); |
116 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
117 | } | |
118 | // Memory allocation for the TClonesArray of reconstructed tracks | |
119 | // Is 10 the right size ???? | |
120 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
54d7ba50 | 121 | |
8429a5e4 | 122 | // Memory allocation for the TClonesArray of hits on reconstructed tracks |
123 | // Is 100 the right size ???? | |
b035a148 | 124 | fRecTrackHitsPtr = new TClonesArray("AliMUONTrackHit", 100); |
a9e2aefa | 125 | |
1a38e749 | 126 | const AliMagF* kField = AliTracker::GetFieldMap(); |
127 | if (!kField) AliFatal("No field available"); | |
128 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,-950). | |
a6f03ddb | 129 | Float_t b[3], x[3]; |
5b64e914 | 130 | x[0] = 50.; x[1] = 50.; x[2] = -950.; |
1a38e749 | 131 | kField->Field(x,b); |
132 | ||
133 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); | |
5b64e914 | 134 | fSimpleBPosition = TMath::Sign(fSimpleBPosition,(Double_t) x[2]); |
a6f03ddb | 135 | // See how to get fSimple(BValue, BLength, BPosition) |
136 | // automatically calculated from the actual magnetic field ???? | |
a9e2aefa | 137 | |
a9e2aefa | 138 | return; |
139 | } | |
9cbdf048 | 140 | |
a9e2aefa | 141 | //__________________________________________________________________________ |
29f1b13a | 142 | AliMUONTrackReconstructor::~AliMUONTrackReconstructor(void) |
a9e2aefa | 143 | { |
29f1b13a | 144 | // Destructor for class AliMUONTrackReconstructor |
a9e2aefa | 145 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? |
190f97ea | 146 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) |
a9e2aefa | 147 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? |
58ff0bd4 | 148 | |
149 | delete fTriggerTrack; | |
a9e2aefa | 150 | } |
a9e2aefa | 151 | //__________________________________________________________________________ |
29f1b13a | 152 | void AliMUONTrackReconstructor::SetReconstructionParametersToDefaults(void) |
a9e2aefa | 153 | { |
154 | // Set reconstruction parameters to default values | |
155 | // Would be much more convenient with a structure (or class) ???? | |
a9e2aefa | 156 | |
a9e2aefa | 157 | // ******** Parameters for making HitsForRec |
158 | // minimum radius, | |
159 | // like in TRACKF_STAT: | |
160 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; | |
161 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 | |
190f97ea | 162 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
06c11448 | 163 | if (ch < 4) fRMin[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * |
a9e2aefa | 164 | 2.0 * TMath::Pi() / 180.0; |
165 | else fRMin[ch] = 30.0; | |
d0bfce8d | 166 | // maximum radius at 10 degrees and Z of chamber |
06c11448 | 167 | fRMax[ch] = TMath::Abs(AliMUONConstants::DefaultChamberZ(ch)) * |
d0bfce8d | 168 | 10.0 * TMath::Pi() / 180.0; |
a9e2aefa | 169 | } |
a9e2aefa | 170 | |
171 | // ******** Parameters for making segments | |
172 | // should be parametrized ???? | |
173 | // according to interval between chambers in a station ???? | |
174 | // Maximum distance in non bending plane | |
175 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
176 | // SIGCUT*DYMAX(IZ) | |
190f97ea | 177 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) |
a9e2aefa | 178 | fSegmentMaxDistNonBending[st] = 5. * 0.22; |
860cef81 | 179 | // Maximum distance in bending plane: |
180 | // values from TRACKF_STAT, corresponding to (J psi 20cm), | |
181 | // scaled to the real distance between chambers in a station | |
ef21c79e | 182 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * |
06c11448 | 183 | (AliMUONConstants::DefaultChamberZ(1) - AliMUONConstants::DefaultChamberZ(0)) / 20.0); |
e516b01d | 184 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * |
06c11448 | 185 | (AliMUONConstants::DefaultChamberZ(3) - AliMUONConstants::DefaultChamberZ(2)) / 20.0); |
e516b01d | 186 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * |
06c11448 | 187 | (AliMUONConstants::DefaultChamberZ(5) - AliMUONConstants::DefaultChamberZ(4)) / 20.0); |
e516b01d | 188 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * |
06c11448 | 189 | (AliMUONConstants::DefaultChamberZ(7) - AliMUONConstants::DefaultChamberZ(6)) / 20.0); |
e516b01d | 190 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * |
06c11448 | 191 | (AliMUONConstants::DefaultChamberZ(9) - AliMUONConstants::DefaultChamberZ(8)) / 20.0); |
192 | ||
a9e2aefa | 193 | return; |
194 | } | |
195 | ||
196 | //__________________________________________________________________________ | |
29f1b13a | 197 | Double_t AliMUONTrackReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const |
a9e2aefa | 198 | { |
199 | // Returns impact parameter at vertex in bending plane (cm), | |
200 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
201 | // using simple values for dipole magnetic field. | |
065bd0e1 | 202 | // The sign of "BendingMomentum" is the sign of the charge. |
a9e2aefa | 203 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
204 | BendingMomentum); | |
205 | } | |
206 | ||
207 | //__________________________________________________________________________ | |
29f1b13a | 208 | Double_t AliMUONTrackReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const |
a9e2aefa | 209 | { |
210 | // Returns signed bending momentum in bending plane (GeV/c), | |
065bd0e1 | 211 | // the sign being the sign of the charge for particles moving forward in Z, |
a9e2aefa | 212 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), |
213 | // using simple values for dipole magnetic field. | |
a9e2aefa | 214 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / |
215 | ImpactParam); | |
216 | } | |
217 | ||
a9e2aefa | 218 | //__________________________________________________________________________ |
29f1b13a | 219 | void AliMUONTrackReconstructor::EventReconstruct(void) |
a9e2aefa | 220 | { |
221 | // To reconstruct one event | |
b840996b | 222 | AliDebug(1,"Enter EventReconstruct"); |
fff097e0 | 223 | ResetTracks(); //AZ |
224 | ResetTrackHits(); //AZ | |
225 | ResetSegments(); //AZ | |
226 | ResetHitsForRec(); //AZ | |
a9e2aefa | 227 | MakeEventToBeReconstructed(); |
228 | MakeSegments(); | |
229 | MakeTracks(); | |
d837040f | 230 | if (fMUONData->IsTriggerTrackBranchesInTree()) |
231 | ValidateTracksWithTrigger(); | |
232 | ||
233 | // Add tracks to MUON data container | |
234 | for(Int_t i=0; i<GetNRecTracks(); i++) { | |
235 | AliMUONTrack * track = (AliMUONTrack*) GetRecTracksPtr()->At(i); | |
236 | fMUONData->AddRecTrack(*track); | |
237 | } | |
238 | ||
a9e2aefa | 239 | return; |
240 | } | |
241 | ||
276c44b7 | 242 | //__________________________________________________________________________ |
29f1b13a | 243 | void AliMUONTrackReconstructor::EventReconstructTrigger(void) |
276c44b7 | 244 | { |
245 | // To reconstruct one event | |
b840996b | 246 | AliDebug(1,"Enter EventReconstructTrigger"); |
276c44b7 | 247 | MakeTriggerTracks(); |
248 | return; | |
249 | } | |
250 | ||
a9e2aefa | 251 | //__________________________________________________________________________ |
29f1b13a | 252 | void AliMUONTrackReconstructor::ResetHitsForRec(void) |
a9e2aefa | 253 | { |
254 | // To reset the array and the number of HitsForRec, | |
255 | // and also the number of HitsForRec | |
256 | // and the index of the first HitForRec per chamber | |
0ce28091 | 257 | if (fHitsForRecPtr) fHitsForRecPtr->Delete(); |
a9e2aefa | 258 | fNHitsForRec = 0; |
190f97ea | 259 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) |
a9e2aefa | 260 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; |
261 | return; | |
262 | } | |
263 | ||
264 | //__________________________________________________________________________ | |
29f1b13a | 265 | void AliMUONTrackReconstructor::ResetSegments(void) |
a9e2aefa | 266 | { |
267 | // To reset the TClonesArray of segments and the number of Segments | |
268 | // for all stations | |
190f97ea | 269 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
a9e2aefa | 270 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); |
271 | fNSegments[st] = 0; | |
272 | } | |
273 | return; | |
274 | } | |
275 | ||
276 | //__________________________________________________________________________ | |
29f1b13a | 277 | void AliMUONTrackReconstructor::ResetTracks(void) |
a9e2aefa | 278 | { |
279 | // To reset the TClonesArray of reconstructed tracks | |
8429a5e4 | 280 | if (fRecTracksPtr) fRecTracksPtr->Delete(); |
281 | // Delete in order that the Track destructors are called, | |
282 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
a9e2aefa | 283 | fNRecTracks = 0; |
284 | return; | |
285 | } | |
286 | ||
276c44b7 | 287 | |
8429a5e4 | 288 | //__________________________________________________________________________ |
29f1b13a | 289 | void AliMUONTrackReconstructor::ResetTrackHits(void) |
8429a5e4 | 290 | { |
291 | // To reset the TClonesArray of hits on reconstructed tracks | |
292 | if (fRecTrackHitsPtr) fRecTrackHitsPtr->Clear(); | |
293 | fNRecTrackHits = 0; | |
294 | return; | |
295 | } | |
296 | ||
a9e2aefa | 297 | //__________________________________________________________________________ |
29f1b13a | 298 | void AliMUONTrackReconstructor::MakeEventToBeReconstructed(void) |
a9e2aefa | 299 | { |
300 | // To make the list of hits to be reconstructed, | |
29fc2c86 | 301 | // either from the track ref. hits or from the raw clusters |
a9e2aefa | 302 | // according to the parameter set for the reconstructor |
1a38e749 | 303 | |
b840996b | 304 | AliDebug(1,"Enter MakeEventToBeReconstructed"); |
fff097e0 | 305 | //AZ ResetHitsForRec(); |
8f373020 | 306 | |
307 | // Reconstruction from raw clusters | |
308 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
309 | // Security on MUON ???? | |
310 | // TreeR assumed to be be "prepared" in calling function | |
311 | // by "MUON->GetTreeR(nev)" ???? | |
cc9e7528 | 312 | TTree *treeR = fMUONData->TreeR(); |
8f373020 | 313 | |
314 | //AZ? fMUONData->SetTreeAddress("RC"); | |
315 | AddHitsForRecFromRawClusters(treeR); | |
316 | // No sorting: it is done automatically in the previous function | |
317 | ||
b840996b | 318 | |
319 | AliDebug(1,"End of MakeEventToBeReconstructed"); | |
320 | if (AliLog::GetGlobalDebugLevel() > 0) { | |
321 | AliDebug(1, Form("NHitsForRec: %d",fNHitsForRec)); | |
190f97ea | 322 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
b840996b | 323 | AliDebug(1, Form("Chamber(0...): %d",ch)); |
324 | AliDebug(1, Form("NHitsForRec: %d", fNHitsForRecPerChamber[ch])); | |
325 | AliDebug(1, Form("Index(first HitForRec): %d", fIndexOfFirstHitForRecPerChamber[ch])); | |
326 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
327 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
328 | hit++) { | |
329 | AliDebug(1, Form("HitForRec index(0...): %d",hit)); | |
330 | ((*fHitsForRecPtr)[hit])->Dump(); | |
a9e2aefa | 331 | } |
332 | } | |
333 | } | |
334 | return; | |
335 | } | |
336 | ||
a9e2aefa | 337 | //__________________________________________________________________________ |
29f1b13a | 338 | void AliMUONTrackReconstructor::SortHitsForRecWithIncreasingChamber() |
a9e2aefa | 339 | { |
340 | // Sort HitsForRec's in increasing order with respect to chamber number. | |
341 | // Uses the function "Compare". | |
342 | // Update the information for HitsForRec per chamber too. | |
343 | Int_t ch, nhits, prevch; | |
344 | fHitsForRecPtr->Sort(); | |
190f97ea | 345 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
a9e2aefa | 346 | fNHitsForRecPerChamber[ch] = 0; |
347 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
348 | } | |
349 | prevch = 0; // previous chamber | |
350 | nhits = 0; // number of hits in current chamber | |
351 | // Loop over HitsForRec | |
352 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
353 | // chamber number (0...) | |
354 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
355 | // increment number of hits in current chamber | |
356 | (fNHitsForRecPerChamber[ch])++; | |
357 | // update index of first HitForRec in current chamber | |
358 | // if chamber number different from previous one | |
359 | if (ch != prevch) { | |
360 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
361 | prevch = ch; | |
362 | } | |
363 | } | |
364 | return; | |
365 | } | |
366 | ||
a9e2aefa | 367 | //__________________________________________________________________________ |
29f1b13a | 368 | void AliMUONTrackReconstructor::AddHitsForRecFromRawClusters(TTree* TR) |
a9e2aefa | 369 | { |
370 | // To add to the list of hits for reconstruction all the raw clusters | |
371 | // No condition added, like in Fortran TRACKF_STAT, | |
372 | // on the radius between RMin and RMax. | |
373 | AliMUONHitForRec *hitForRec; | |
374 | AliMUONRawCluster *clus; | |
f69d51b5 | 375 | Int_t iclus, nclus, nTRentries; |
a9e2aefa | 376 | TClonesArray *rawclusters; |
b840996b | 377 | AliDebug(1,"Enter AddHitsForRecFromRawClusters"); |
88cb7938 | 378 | |
cc87ebcd | 379 | if (fTrackMethod != 3) { //AZ |
380 | fMUONData->SetTreeAddress("RC"); //AZ | |
381 | nTRentries = Int_t(TR->GetEntries()); | |
382 | if (nTRentries != 1) { | |
383 | AliError(Form("nTRentries = %d not equal to 1 ",nTRentries)); | |
384 | exit(0); | |
385 | } | |
cc9e7528 | 386 | fMUONData->GetRawClusters(); // only one entry |
f69d51b5 | 387 | } |
52c9bc11 | 388 | |
a9e2aefa | 389 | // Loop over tracking chambers |
190f97ea | 390 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { |
a9e2aefa | 391 | // number of HitsForRec to 0 for the chamber |
392 | fNHitsForRecPerChamber[ch] = 0; | |
393 | // index of first HitForRec for the chamber | |
394 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
395 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
52c9bc11 | 396 | rawclusters =fMUONData->RawClusters(ch); |
a9e2aefa | 397 | nclus = (Int_t) (rawclusters->GetEntries()); |
398 | // Loop over (cathode correlated) raw clusters | |
399 | for (iclus = 0; iclus < nclus; iclus++) { | |
400 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); | |
401 | // new AliMUONHitForRec from raw cluster | |
402 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
403 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
404 | fNHitsForRec++; | |
405 | (fNHitsForRecPerChamber[ch])++; | |
406 | // more information into HitForRec | |
407 | // resolution: info should be already in raw cluster and taken from it ???? | |
fff097e0 | 408 | //hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); |
409 | //hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
410 | hitForRec->SetBendingReso2(clus->GetErrY() * clus->GetErrY()); | |
411 | hitForRec->SetNonBendingReso2(clus->GetErrX() * clus->GetErrX()); | |
a9e2aefa | 412 | // original raw cluster |
413 | hitForRec->SetChamberNumber(ch); | |
414 | hitForRec->SetHitNumber(iclus); | |
ba5b68db | 415 | // Z coordinate of the raw cluster (cm) |
ba12c242 | 416 | hitForRec->SetZ(clus->GetZ(0)); |
b840996b | 417 | if (AliLog::GetGlobalDebugLevel() > 1) { |
a9e2aefa | 418 | cout << "chamber (0...): " << ch << |
419 | " raw cluster (0...): " << iclus << endl; | |
420 | clus->Dump(); | |
421 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
422 | hitForRec->Dump();} | |
423 | } // end of cluster loop | |
424 | } // end of chamber loop | |
cc87ebcd | 425 | SortHitsForRecWithIncreasingChamber(); |
a9e2aefa | 426 | return; |
427 | } | |
428 | ||
429 | //__________________________________________________________________________ | |
29f1b13a | 430 | void AliMUONTrackReconstructor::MakeSegments(void) |
a9e2aefa | 431 | { |
432 | // To make the list of segments in all stations, | |
433 | // from the list of hits to be reconstructed | |
b840996b | 434 | AliDebug(1,"Enter MakeSegments"); |
fff097e0 | 435 | //AZ ResetSegments(); |
a9e2aefa | 436 | // Loop over stations |
cc87ebcd | 437 | Int_t nb = (fTrackMethod != 1) ? 3 : 0; //AZ |
438 | for (Int_t st = nb; st < AliMUONConstants::NTrackingCh()/2; st++) | |
a9e2aefa | 439 | MakeSegmentsPerStation(st); |
b840996b | 440 | if (AliLog::GetGlobalDebugLevel() > 1) { |
a9e2aefa | 441 | cout << "end of MakeSegments" << endl; |
190f97ea | 442 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { |
a9e2aefa | 443 | cout << "station(0...): " << st |
444 | << " Segments: " << fNSegments[st] | |
445 | << endl; | |
446 | for (Int_t seg = 0; | |
447 | seg < fNSegments[st]; | |
448 | seg++) { | |
449 | cout << "Segment index(0...): " << seg << endl; | |
450 | ((*fSegmentsPtr[st])[seg])->Dump(); | |
451 | } | |
452 | } | |
453 | } | |
454 | return; | |
455 | } | |
456 | ||
457 | //__________________________________________________________________________ | |
29f1b13a | 458 | void AliMUONTrackReconstructor::MakeSegmentsPerStation(Int_t Station) |
a9e2aefa | 459 | { |
460 | // To make the list of segments in station number "Station" (0...) | |
461 | // from the list of hits to be reconstructed. | |
462 | // Updates "fNSegments"[Station]. | |
463 | // Segments in stations 4 and 5 are sorted | |
464 | // according to increasing absolute value of "impact parameter" | |
465 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
466 | AliMUONSegment *segment; | |
467 | Bool_t last2st; | |
468 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
d0bfce8d | 469 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. |
b840996b | 470 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",Station)); |
a9e2aefa | 471 | // first and second chambers (0...) in the station |
472 | Int_t ch1 = 2 * Station; | |
473 | Int_t ch2 = ch1 + 1; | |
474 | // variable true for stations downstream of the dipole: | |
475 | // Station(0..4) equal to 3 or 4 | |
476 | if ((Station == 3) || (Station == 4)) { | |
477 | last2st = kTRUE; | |
478 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
479 | maxImpactParam = | |
480 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
d0bfce8d | 481 | // minimum impact parameter (cm) according to fMaxBendingMomentum... |
482 | minImpactParam = | |
483 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); | |
a9e2aefa | 484 | } |
485 | else last2st = kFALSE; | |
486 | // extrapolation factor from Z of first chamber to Z of second chamber | |
487 | // dZ to be changed to take into account fine structure of chambers ???? | |
e516b01d | 488 | Double_t extrapFact; |
a9e2aefa | 489 | // index for current segment |
490 | Int_t segmentIndex = 0; | |
491 | // Loop over HitsForRec in the first chamber of the station | |
492 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
493 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
494 | hit1++) { | |
495 | // pointer to the HitForRec | |
496 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
497 | // extrapolation, | |
498 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
499 | // to the Z of the second chamber of the station | |
a9e2aefa | 500 | // Loop over HitsForRec in the second chamber of the station |
501 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
502 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
503 | hit2++) { | |
504 | // pointer to the HitForRec | |
505 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
506 | // absolute values of distances, in bending and non bending planes, | |
507 | // between the HitForRec in the second chamber | |
508 | // and the previous extrapolation | |
e516b01d | 509 | extrapFact = hit2Ptr->GetZ()/ hit1Ptr->GetZ(); |
510 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
511 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
a9e2aefa | 512 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); |
513 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
514 | if (last2st) { | |
515 | // bending slope | |
8999d47d | 516 | if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0.0 ) { |
517 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
518 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
519 | // absolute value of impact parameter | |
520 | impactParam = | |
521 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); | |
522 | } | |
523 | else { | |
524 | AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): impactParam set to maxImpactParam"); | |
525 | impactParam = maxImpactParam; | |
526 | } | |
a9e2aefa | 527 | } |
528 | // check for distances not too large, | |
529 | // and impact parameter not too big if stations downstream of the dipole. | |
530 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
531 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
532 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
d0bfce8d | 533 | (!last2st || (impactParam < maxImpactParam)) && |
534 | (!last2st || (impactParam > minImpactParam))) { | |
a9e2aefa | 535 | // make new segment |
536 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
537 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
538 | // update "link" to this segment from the hit in the first chamber | |
539 | if (hit1Ptr->GetNSegments() == 0) | |
540 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
541 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
b840996b | 542 | if (AliLog::GetGlobalDebugLevel() > 1) { |
a9e2aefa | 543 | cout << "segmentIndex(0...): " << segmentIndex |
544 | << " distBend: " << distBend | |
545 | << " distNonBend: " << distNonBend | |
546 | << endl; | |
547 | segment->Dump(); | |
548 | cout << "HitForRec in first chamber" << endl; | |
549 | hit1Ptr->Dump(); | |
550 | cout << "HitForRec in second chamber" << endl; | |
551 | hit2Ptr->Dump(); | |
552 | }; | |
553 | // increment index for current segment | |
554 | segmentIndex++; | |
555 | } | |
556 | } //for (Int_t hit2 | |
557 | } // for (Int_t hit1... | |
558 | fNSegments[Station] = segmentIndex; | |
559 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
560 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
561 | // After this sorting, it is impossible to use | |
562 | // the "fNSegments" and "fIndexOfFirstSegment" | |
563 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
564 | // Is this sorting really needed ???? | |
565 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
b840996b | 566 | AliDebug(1,Form("Station: %d NSegments: %d ", Station, fNSegments[Station])); |
a9e2aefa | 567 | return; |
568 | } | |
569 | ||
570 | //__________________________________________________________________________ | |
29f1b13a | 571 | void AliMUONTrackReconstructor::MakeTracks(void) |
a9e2aefa | 572 | { |
573 | // To make the tracks, | |
574 | // from the list of segments and points in all stations | |
b840996b | 575 | AliDebug(1,"Enter MakeTracks"); |
8429a5e4 | 576 | // The order may be important for the following Reset's |
fff097e0 | 577 | //AZ ResetTracks(); |
578 | //AZ ResetTrackHits(); | |
cc87ebcd | 579 | if (fTrackMethod != 1) { //AZ - Kalman filter |
83dbc640 | 580 | MakeTrackCandidatesK(); |
b035a148 | 581 | if (fRecTracksPtr->GetEntriesFast() == 0) return; |
83dbc640 | 582 | // Follow tracks in stations(1..) 3, 2 and 1 |
583 | FollowTracksK(); | |
584 | // Remove double tracks | |
585 | RemoveDoubleTracksK(); | |
586 | // Propagate tracks to the vertex thru absorber | |
587 | GoToVertex(); | |
b035a148 | 588 | // Fill AliMUONTrack data members |
589 | FillMUONTrack(); | |
d837040f | 590 | } else { |
83dbc640 | 591 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 |
592 | MakeTrackCandidates(); | |
593 | // Follow tracks in stations(1..) 3, 2 and 1 | |
594 | FollowTracks(); | |
595 | // Remove double tracks | |
596 | RemoveDoubleTracks(); | |
d837040f | 597 | UpdateTrackParamAtHit(); |
b8dc484b | 598 | UpdateHitForRecAtHit(); |
52c9bc11 | 599 | } |
a9e2aefa | 600 | return; |
601 | } | |
602 | ||
276c44b7 | 603 | //__________________________________________________________________________ |
29f1b13a | 604 | void AliMUONTrackReconstructor::ValidateTracksWithTrigger(void) |
d837040f | 605 | { |
7e6d7e07 | 606 | // Try to match track from tracking system with trigger track |
d837040f | 607 | AliMUONTrack *track; |
24ab3324 | 608 | TClonesArray *recTriggerTracks; |
609 | ||
24ab3324 | 610 | fMUONData->SetTreeAddress("RL"); |
611 | fMUONData->GetRecTriggerTracks(); | |
612 | recTriggerTracks = fMUONData->RecTriggerTracks(); | |
e8765288 | 613 | |
d837040f | 614 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
615 | while (track) { | |
616 | track->MatchTriggerTrack(recTriggerTracks); | |
617 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
e8765288 | 618 | } |
24ab3324 | 619 | |
d837040f | 620 | } |
621 | ||
622 | //__________________________________________________________________________ | |
29f1b13a | 623 | Bool_t AliMUONTrackReconstructor::MakeTriggerTracks(void) |
276c44b7 | 624 | { |
625 | // To make the trigger tracks from Local Trigger | |
b840996b | 626 | AliDebug(1, "Enter MakeTriggerTracks"); |
276c44b7 | 627 | |
628 | Int_t nTRentries; | |
52c9bc11 | 629 | Long_t gloTrigPat; |
276c44b7 | 630 | TClonesArray *localTrigger; |
9131b4fe | 631 | TClonesArray *globalTrigger; |
276c44b7 | 632 | AliMUONLocalTrigger *locTrg; |
9131b4fe | 633 | AliMUONGlobalTrigger *gloTrg; |
bc4a7ff4 | 634 | |
cc9e7528 | 635 | TTree* treeR = fMUONData->TreeR(); |
5e671e06 | 636 | |
30178c30 | 637 | nTRentries = Int_t(treeR->GetEntries()); |
d837040f | 638 | |
30178c30 | 639 | treeR->GetEvent(0); // only one entry |
d837040f | 640 | |
641 | if (!(fMUONData->IsTriggerBranchesInTree())) { | |
8c343c7c | 642 | AliWarning(Form("Trigger information is not avalaible, nTRentries = %d not equal to 1",nTRentries)); |
d837040f | 643 | return kFALSE; |
276c44b7 | 644 | } |
276c44b7 | 645 | |
ce3e25a8 | 646 | fMUONData->SetTreeAddress("TC"); |
52c9bc11 | 647 | fMUONData->GetTrigger(); |
9131b4fe | 648 | |
52c9bc11 | 649 | // global trigger for trigger pattern |
9131b4fe | 650 | gloTrigPat = 0; |
52c9bc11 | 651 | globalTrigger = fMUONData->GlobalTrigger(); |
58ff0bd4 | 652 | gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0); |
653 | ||
654 | if (gloTrg) | |
655 | gloTrigPat = gloTrg->GetGlobalPattern(); | |
656 | ||
9131b4fe | 657 | |
52c9bc11 | 658 | // local trigger for tracking |
659 | localTrigger = fMUONData->LocalTrigger(); | |
276c44b7 | 660 | Int_t nlocals = (Int_t) (localTrigger->GetEntries()); |
06c11448 | 661 | |
662 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); | |
663 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
276c44b7 | 664 | |
bc4a7ff4 | 665 | Float_t y11 = 0.; |
666 | Int_t stripX21 = 0; | |
667 | Float_t y21 = 0.; | |
668 | Float_t x11 = 0.; | |
669 | ||
276c44b7 | 670 | for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger |
52c9bc11 | 671 | locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i); |
bc4a7ff4 | 672 | |
7fead4bb | 673 | AliDebug(1, "AliMUONTrackReconstructor::MakeTriggerTrack using NEW trigger \n"); |
5e671e06 | 674 | AliMUONTriggerCircuitNew* circuit = |
675 | (AliMUONTriggerCircuitNew*)fTriggerCircuit->At(locTrg->LoCircuit()-1); // -1 !!! | |
676 | ||
7fead4bb | 677 | y11 = circuit->GetY11Pos(locTrg->LoStripX()); |
678 | stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1; | |
679 | y21 = circuit->GetY21Pos(stripX21); | |
680 | x11 = circuit->GetX11Pos(locTrg->LoStripY()); | |
681 | ||
58ff0bd4 | 682 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %d %f %f %f \n",i,locTrg->LoCircuit(), |
683 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
7fead4bb | 684 | |
52c9bc11 | 685 | Float_t thetax = TMath::ATan2( x11 , z11 ); |
686 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
bc4a7ff4 | 687 | |
58ff0bd4 | 688 | fTriggerTrack->SetX11(x11); |
689 | fTriggerTrack->SetY11(y11); | |
690 | fTriggerTrack->SetThetax(thetax); | |
691 | fTriggerTrack->SetThetay(thetay); | |
692 | fTriggerTrack->SetGTPattern(gloTrigPat); | |
693 | ||
694 | fMUONData->AddRecTriggerTrack(*fTriggerTrack); | |
276c44b7 | 695 | } // end of loop on Local Trigger |
d837040f | 696 | return kTRUE; |
276c44b7 | 697 | } |
698 | ||
a9e2aefa | 699 | //__________________________________________________________________________ |
29f1b13a | 700 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) |
a9e2aefa | 701 | { |
702 | // To make track candidates with two segments in stations(1..) 4 and 5, | |
703 | // the first segment being pointed to by "BegSegment". | |
704 | // Returns the number of such track candidates. | |
705 | Int_t endStation, iEndSegment, nbCan2Seg; | |
e516b01d | 706 | AliMUONSegment *endSegment; |
707 | AliMUONSegment *extrapSegment = NULL; | |
a9e2aefa | 708 | AliMUONTrack *recTrack; |
709 | Double_t mcsFactor; | |
b840996b | 710 | AliDebug(1,"Enter MakeTrackCandidatesWithTwoSegments"); |
a9e2aefa | 711 | // Station for the end segment |
712 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
713 | // multiple scattering factor corresponding to one chamber | |
714 | mcsFactor = 0.0136 / | |
715 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
716 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
717 | // linear extrapolation to end station | |
a9e2aefa | 718 | // number of candidates with 2 segments to 0 |
719 | nbCan2Seg = 0; | |
720 | // Loop over segments in the end station | |
721 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { | |
722 | // pointer to segment | |
723 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); | |
724 | // test compatibility between current segment and "extrapSegment" | |
04b5ea16 | 725 | // 4 because 4 quantities in chi2 |
e516b01d | 726 | extrapSegment = |
727 | BegSegment->CreateSegmentFromLinearExtrapToStation(endSegment->GetZ(), mcsFactor); | |
a9e2aefa | 728 | if ((endSegment-> |
729 | NormalizedChi2WithSegment(extrapSegment, | |
730 | fMaxSigma2Distance)) <= 4.0) { | |
731 | // both segments compatible: | |
732 | // make track candidate from "begSegment" and "endSegment" | |
b840996b | 733 | AliDebug(2,Form("TrackCandidate with Segment %d in Station(0..) %d", iEndSegment, endStation)); |
a9e2aefa | 734 | // flag for both segments in one track: |
735 | // to be done in track constructor ???? | |
736 | BegSegment->SetInTrack(kTRUE); | |
737 | endSegment->SetInTrack(kTRUE); | |
738 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
739 | AliMUONTrack(BegSegment, endSegment, this); | |
740 | fNRecTracks++; | |
b840996b | 741 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); |
a9e2aefa | 742 | // increment number of track candidates with 2 segments |
743 | nbCan2Seg++; | |
744 | } | |
ddf8948c | 745 | delete extrapSegment; // should not delete HitForRec's it points to !!!! |
a9e2aefa | 746 | } // for (iEndSegment = 0;... |
a9e2aefa | 747 | return nbCan2Seg; |
748 | } | |
749 | ||
750 | //__________________________________________________________________________ | |
29f1b13a | 751 | Int_t AliMUONTrackReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) |
a9e2aefa | 752 | { |
753 | // To make track candidates with one segment and one point | |
754 | // in stations(1..) 4 and 5, | |
755 | // the segment being pointed to by "BegSegment". | |
756 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; | |
e516b01d | 757 | AliMUONHitForRec *extrapHitForRec= NULL; |
758 | AliMUONHitForRec *hit; | |
a9e2aefa | 759 | AliMUONTrack *recTrack; |
760 | Double_t mcsFactor; | |
b840996b | 761 | AliDebug(1,"Enter MakeTrackCandidatesWithOneSegmentAndOnePoint"); |
a9e2aefa | 762 | // station for the end point |
763 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
764 | // multiple scattering factor corresponding to one chamber | |
765 | mcsFactor = 0.0136 / | |
766 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
767 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
768 | // first and second chambers(0..) in the end station | |
769 | ch1 = 2 * endStation; | |
770 | ch2 = ch1 + 1; | |
771 | // number of candidates to 0 | |
772 | nbCan1Seg1Hit = 0; | |
773 | // Loop over chambers of the end station | |
774 | for (ch = ch2; ch >= ch1; ch--) { | |
a9e2aefa | 775 | // limits for the hit index in the loop |
776 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; | |
777 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; | |
778 | // Loop over HitForRec's in the chamber | |
779 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { | |
780 | // pointer to HitForRec | |
781 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
782 | // test compatibility between current HitForRec and "extrapHitForRec" | |
04b5ea16 | 783 | // 2 because 2 quantities in chi2 |
e516b01d | 784 | // linear extrapolation to chamber |
785 | extrapHitForRec = | |
786 | BegSegment->CreateHitForRecFromLinearExtrapToChamber( hit->GetZ(), mcsFactor); | |
a9e2aefa | 787 | if ((hit-> |
788 | NormalizedChi2WithHitForRec(extrapHitForRec, | |
789 | fMaxSigma2Distance)) <= 2.0) { | |
790 | // both HitForRec's compatible: | |
791 | // make track candidate from begSegment and current HitForRec | |
b840996b | 792 | AliDebug(2, Form("TrackCandidate with HitForRec %d in Chamber(0..) %d", iHit, ch)); |
a9e2aefa | 793 | // flag for beginning segments in one track: |
794 | // to be done in track constructor ???? | |
795 | BegSegment->SetInTrack(kTRUE); | |
796 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
797 | AliMUONTrack(BegSegment, hit, this); | |
798 | // the right place to eliminate "double counting" ???? how ???? | |
799 | fNRecTracks++; | |
b840996b | 800 | if (AliLog::GetGlobalDebugLevel() > 1) recTrack->RecursiveDump(); |
a9e2aefa | 801 | // increment number of track candidates |
802 | nbCan1Seg1Hit++; | |
803 | } | |
ddf8948c | 804 | delete extrapHitForRec; |
a9e2aefa | 805 | } // for (iHit = iHitMin;... |
a9e2aefa | 806 | } // for (ch = ch2;... |
807 | return nbCan1Seg1Hit; | |
808 | } | |
809 | ||
810 | //__________________________________________________________________________ | |
29f1b13a | 811 | void AliMUONTrackReconstructor::MakeTrackCandidates(void) |
a9e2aefa | 812 | { |
813 | // To make track candidates | |
814 | // with at least 3 aligned points in stations(1..) 4 and 5 | |
815 | // (two Segment's or one Segment and one HitForRec) | |
816 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; | |
817 | AliMUONSegment *begSegment; | |
b840996b | 818 | AliDebug(1,"Enter MakeTrackCandidates"); |
a9e2aefa | 819 | // Loop over stations(1..) 5 and 4 for the beginning segment |
820 | for (begStation = 4; begStation > 2; begStation--) { | |
821 | // Loop over segments in the beginning station | |
822 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { | |
823 | // pointer to segment | |
824 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); | |
b840996b | 825 | AliDebug(2,Form("Look for TrackCandidate's with Segment %d in Station(0..) %d", iBegSegment, begStation)); |
a9e2aefa | 826 | // Look for track candidates with two segments, |
827 | // "begSegment" and all compatible segments in other station. | |
828 | // Only for beginning station(1..) 5 | |
829 | // because candidates with 2 segments have to looked for only once. | |
830 | if (begStation == 4) | |
831 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); | |
956019b6 | 832 | // Look for track candidates with one segment and one point, |
a9e2aefa | 833 | // "begSegment" and all compatible HitForRec's in other station. |
834 | // Only if "begSegment" does not belong already to a track candidate. | |
835 | // Is that a too strong condition ???? | |
836 | if (!(begSegment->GetInTrack())) | |
837 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); | |
838 | } // for (iBegSegment = 0;... | |
839 | } // for (begStation = 4;... | |
840 | return; | |
841 | } | |
842 | ||
843 | //__________________________________________________________________________ | |
29f1b13a | 844 | void AliMUONTrackReconstructor::FollowTracks(void) |
a9e2aefa | 845 | { |
846 | // Follow tracks in stations(1..) 3, 2 and 1 | |
04b5ea16 | 847 | // too long: should be made more modular !!!! |
e516b01d | 848 | AliMUONHitForRec *bestHit, *extrapHit, *hit; |
849 | AliMUONSegment *bestSegment, *extrapSegment, *segment; | |
04b5ea16 | 850 | AliMUONTrack *track, *nextTrack; |
851 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; | |
ecfa008b | 852 | // -1 to avoid compilation warnings |
853 | Int_t ch = -1, chInStation, chBestHit = -1, iHit, iSegment, station, trackIndex; | |
04b5ea16 | 854 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; |
d0bfce8d | 855 | Double_t bendingMomentum, chi2Norm = 0.; |
cc87ebcd | 856 | |
1a38e749 | 857 | |
04b5ea16 | 858 | // local maxSigma2Distance, for easy increase in testing |
859 | maxSigma2Distance = fMaxSigma2Distance; | |
b840996b | 860 | AliDebug(2,"Enter FollowTracks"); |
a9e2aefa | 861 | // Loop over track candidates |
04b5ea16 | 862 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
863 | trackIndex = -1; | |
864 | while (track) { | |
865 | // Follow function for each track candidate ???? | |
866 | trackIndex++; | |
867 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track | |
b840996b | 868 | AliDebug(2,Form("FollowTracks: track candidate(0..): %d", trackIndex)); |
956019b6 | 869 | // Fit track candidate |
870 | track->SetFitMCS(0); // without multiple Coulomb scattering | |
871 | track->SetFitNParam(3); // with 3 parameters (X = Y = 0) | |
872 | track->SetFitStart(0); // from parameters at vertex | |
873 | track->Fit(); | |
b840996b | 874 | if (AliLog::GetGlobalDebugLevel()> 2) { |
a9e2aefa | 875 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
956019b6 | 876 | << " after fit in stations(0..) 3 and 4" << endl; |
a9e2aefa | 877 | track->RecursiveDump(); |
878 | } | |
879 | // Loop over stations(1..) 3, 2 and 1 | |
04b5ea16 | 880 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? |
881 | // otherwise: majority coincidence 2 !!!! | |
a9e2aefa | 882 | for (station = 2; station >= 0; station--) { |
883 | // Track parameters at first track hit (smallest Z) | |
884 | trackParam1 = ((AliMUONTrackHit*) | |
885 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
886 | // extrapolation to station | |
887 | trackParam1->ExtrapToStation(station, trackParam); | |
79e1e601 | 888 | extrapSegment = new AliMUONSegment(); // empty segment |
a9e2aefa | 889 | // multiple scattering factor corresponding to one chamber |
890 | // and momentum in bending plane (not total) | |
891 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); | |
892 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
893 | // Z difference from previous station | |
f93b9bd8 | 894 | dZ1 = AliMUONConstants::DefaultChamberZ(2 * station) - |
895 | AliMUONConstants::DefaultChamberZ(2 * station + 2); | |
a9e2aefa | 896 | // Z difference between the two previous stations |
f93b9bd8 | 897 | dZ2 = AliMUONConstants::DefaultChamberZ(2 * station + 2) - |
898 | AliMUONConstants::DefaultChamberZ(2 * station + 4); | |
04b5ea16 | 899 | // Z difference between the two chambers in the previous station |
f93b9bd8 | 900 | dZ3 = AliMUONConstants::DefaultChamberZ(2 * station) - |
901 | AliMUONConstants::DefaultChamberZ(2 * station + 1); | |
04b5ea16 | 902 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); |
903 | extrapSegment-> | |
904 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
905 | extrapSegment->UpdateFromStationTrackParam | |
906 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
907 | trackParam1->GetInverseBendingMomentum()); | |
a9e2aefa | 908 | bestChi2 = 5.0; |
909 | bestSegment = NULL; | |
b840996b | 910 | if (AliLog::GetGlobalDebugLevel() > 2) { |
a9e2aefa | 911 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
912 | << " Look for segment in station(0..): " << station << endl; | |
913 | } | |
1a38e749 | 914 | |
a9e2aefa | 915 | // Loop over segments in station |
916 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { | |
917 | // Look for best compatible Segment in station | |
918 | // should consider all possibilities ???? | |
919 | // multiple scattering ???? | |
920 | // separation in 2 functions: Segment and HitForRec ???? | |
921 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); | |
d0bfce8d | 922 | // correction of corrected segment (fBendingCoor and fNonBendingCoor) |
923 | // according to real Z value of "segment" and slopes of "extrapSegment" | |
e516b01d | 924 | (&(trackParam[0]))->ExtrapToZ(segment->GetZ()); |
925 | (&(trackParam[1]))->ExtrapToZ(segment->GetZ()); | |
926 | extrapSegment->SetBendingCoor((&(trackParam[0]))->GetBendingCoor()); | |
927 | extrapSegment->SetNonBendingCoor((&(trackParam[0]))->GetNonBendingCoor()); | |
928 | extrapSegment->SetBendingSlope((&(trackParam[0]))->GetBendingSlope()); | |
929 | extrapSegment->SetNonBendingSlope((&(trackParam[0]))->GetNonBendingSlope()); | |
d0bfce8d | 930 | chi2 = segment-> |
e516b01d | 931 | NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance); |
a9e2aefa | 932 | if (chi2 < bestChi2) { |
933 | // update best Chi2 and Segment if better found | |
934 | bestSegment = segment; | |
935 | bestChi2 = chi2; | |
936 | } | |
937 | } | |
938 | if (bestSegment) { | |
939 | // best segment found: add it to track candidate | |
e516b01d | 940 | (&(trackParam[0]))->ExtrapToZ(bestSegment->GetZ()); |
941 | (&(trackParam[1]))->ExtrapToZ(bestSegment->GetZ()); | |
a9e2aefa | 942 | track->AddSegment(bestSegment); |
943 | // set track parameters at these two TrakHit's | |
944 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); | |
945 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); | |
b840996b | 946 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Added segment in station(0..): %d", trackIndex, station)); |
947 | if (AliLog::GetGlobalDebugLevel()>2) track->RecursiveDump(); | |
a9e2aefa | 948 | } |
949 | else { | |
950 | // No best segment found: | |
951 | // Look for best compatible HitForRec in station: | |
952 | // should consider all possibilities ???? | |
953 | // multiple scattering ???? do about like for extrapSegment !!!! | |
79e1e601 | 954 | extrapHit = new AliMUONHitForRec(); // empty hit |
a9e2aefa | 955 | bestChi2 = 3.0; |
956 | bestHit = NULL; | |
b840996b | 957 | AliDebug(3, Form("FollowTracks: track candidate(0..): %d Segment not found, look for hit in station(0..): %d ", |
958 | trackIndex, station)); | |
959 | ||
a9e2aefa | 960 | // Loop over chambers of the station |
d82671a0 | 961 | for (chInStation = 0; chInStation < 2; chInStation++) { |
956019b6 | 962 | ch = 2 * station + chInStation; |
a9e2aefa | 963 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; |
964 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + | |
965 | fNHitsForRecPerChamber[ch]; | |
966 | iHit++) { | |
967 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
e516b01d | 968 | // coordinates of extrapolated hit |
969 | (&(trackParam[chInStation]))->ExtrapToZ(hit->GetZ()); | |
970 | extrapHit-> | |
971 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
972 | extrapHit-> | |
973 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
974 | // resolutions from "extrapSegment" | |
975 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
976 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
977 | // Loop over hits in the chamber | |
a9e2aefa | 978 | // condition for hit not already in segment ???? |
979 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); | |
980 | if (chi2 < bestChi2) { | |
981 | // update best Chi2 and HitForRec if better found | |
982 | bestHit = hit; | |
983 | bestChi2 = chi2; | |
d82671a0 | 984 | chBestHit = chInStation; |
a9e2aefa | 985 | } |
986 | } | |
987 | } | |
988 | if (bestHit) { | |
989 | // best hit found: add it to track candidate | |
e516b01d | 990 | (&(trackParam[chBestHit]))->ExtrapToZ(bestHit->GetZ()); |
a9e2aefa | 991 | track->AddHitForRec(bestHit); |
956019b6 | 992 | // set track parameters at this TrackHit |
a9e2aefa | 993 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, |
994 | &(trackParam[chBestHit])); | |
b840996b | 995 | if (AliLog::GetGlobalDebugLevel() > 2) { |
a9e2aefa | 996 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
997 | << " Added hit in station(0..): " << station << endl; | |
998 | track->RecursiveDump(); | |
999 | } | |
1000 | } | |
1001 | else { | |
8429a5e4 | 1002 | // Remove current track candidate |
1003 | // and corresponding TrackHit's, ... | |
1004 | track->Remove(); | |
04b5ea16 | 1005 | delete extrapSegment; |
d0bfce8d | 1006 | delete extrapHit; |
a9e2aefa | 1007 | break; // stop the search for this candidate: |
1008 | // exit from the loop over station | |
1009 | } | |
d0bfce8d | 1010 | delete extrapHit; |
a9e2aefa | 1011 | } |
04b5ea16 | 1012 | delete extrapSegment; |
a9e2aefa | 1013 | // Sort track hits according to increasing Z |
1014 | track->GetTrackHitsPtr()->Sort(); | |
1015 | // Update track parameters at first track hit (smallest Z) | |
1016 | trackParam1 = ((AliMUONTrackHit*) | |
1017 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
d0bfce8d | 1018 | bendingMomentum = 0.; |
1019 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0.) | |
1020 | bendingMomentum = TMath::Abs(1/(trackParam1->GetInverseBendingMomentum())); | |
1021 | // Track removed if bendingMomentum not in window [min, max] | |
1022 | if ((bendingMomentum < fMinBendingMomentum) || (bendingMomentum > fMaxBendingMomentum)) { | |
1023 | track->Remove(); | |
1024 | break; // stop the search for this candidate: | |
1025 | // exit from the loop over station | |
1026 | } | |
956019b6 | 1027 | // Track fit |
04b5ea16 | 1028 | // with multiple Coulomb scattering if all stations |
1029 | if (station == 0) track->SetFitMCS(1); | |
956019b6 | 1030 | // without multiple Coulomb scattering if not all stations |
04b5ea16 | 1031 | else track->SetFitMCS(0); |
956019b6 | 1032 | track->SetFitNParam(5); // with 5 parameters (momentum and position) |
1033 | track->SetFitStart(1); // from parameters at first hit | |
1034 | track->Fit(); | |
d0bfce8d | 1035 | Double_t numberOfDegFree = (2.0 * track->GetNTrackHits() - 5); |
1036 | if (numberOfDegFree > 0) { | |
1037 | chi2Norm = track->GetFitFMin() / numberOfDegFree; | |
1038 | } else { | |
1039 | chi2Norm = 1.e10; | |
1040 | } | |
1041 | // Track removed if normalized chi2 too high | |
1042 | if (chi2Norm > fMaxChi2) { | |
1043 | track->Remove(); | |
1044 | break; // stop the search for this candidate: | |
1045 | // exit from the loop over station | |
1046 | } | |
b840996b | 1047 | if (AliLog::GetGlobalDebugLevel() > 2) { |
a9e2aefa | 1048 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
1049 | << " after fit from station(0..): " << station << " to 4" << endl; | |
1050 | track->RecursiveDump(); | |
1051 | } | |
04b5ea16 | 1052 | // Track extrapolation to the vertex through the absorber (Branson) |
956019b6 | 1053 | // after going through the first station |
04b5ea16 | 1054 | if (station == 0) { |
1055 | trackParamVertex = *trackParam1; | |
889a0215 | 1056 | (&trackParamVertex)->ExtrapToVertex(0.,0.,0.); |
04b5ea16 | 1057 | track->SetTrackParamAtVertex(&trackParamVertex); |
b840996b | 1058 | if (AliLog::GetGlobalDebugLevel() > 0) { |
6ae236ee | 1059 | cout << "FollowTracks: track candidate(0..): " << trackIndex |
1060 | << " after extrapolation to vertex" << endl; | |
1061 | track->RecursiveDump(); | |
1062 | } | |
04b5ea16 | 1063 | } |
a9e2aefa | 1064 | } // for (station = 2;... |
04b5ea16 | 1065 | // go really to next track |
1066 | track = nextTrack; | |
1067 | } // while (track) | |
1068 | // Compression of track array (necessary after Remove ????) | |
1069 | fRecTracksPtr->Compress(); | |
1070 | return; | |
1071 | } | |
1072 | ||
1073 | //__________________________________________________________________________ | |
29f1b13a | 1074 | void AliMUONTrackReconstructor::RemoveDoubleTracks(void) |
8429a5e4 | 1075 | { |
1076 | // To remove double tracks. | |
1077 | // Tracks are considered identical | |
1078 | // if they have at least half of their hits in common. | |
1079 | // Among two identical tracks, one keeps the track with the larger number of hits | |
1080 | // or, if these numbers are equal, the track with the minimum Chi2. | |
1081 | AliMUONTrack *track1, *track2, *trackToRemove; | |
1082 | Bool_t identicalTracks; | |
1083 | Int_t hitsInCommon, nHits1, nHits2; | |
1084 | identicalTracks = kTRUE; | |
1085 | while (identicalTracks) { | |
1086 | identicalTracks = kFALSE; | |
1087 | // Loop over first track of the pair | |
1088 | track1 = (AliMUONTrack*) fRecTracksPtr->First(); | |
1089 | while (track1 && (!identicalTracks)) { | |
1090 | nHits1 = track1->GetNTrackHits(); | |
1091 | // Loop over second track of the pair | |
1092 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1093 | while (track2 && (!identicalTracks)) { | |
1094 | nHits2 = track2->GetNTrackHits(); | |
1095 | // number of hits in common between two tracks | |
1096 | hitsInCommon = track1->HitsInCommon(track2); | |
1097 | // check for identical tracks | |
1098 | if ((4 * hitsInCommon) >= (nHits1 + nHits2)) { | |
1099 | identicalTracks = kTRUE; | |
1100 | // decide which track to remove | |
1101 | if (nHits1 > nHits2) trackToRemove = track2; | |
1102 | else if (nHits1 < nHits2) trackToRemove = track1; | |
1103 | else if ((track1->GetFitFMin()) < (track2->GetFitFMin())) | |
1104 | trackToRemove = track2; | |
1105 | else trackToRemove = track1; | |
1106 | // remove it | |
1107 | trackToRemove->Remove(); | |
1108 | } | |
1109 | track2 = (AliMUONTrack*) fRecTracksPtr->After(track2); | |
1110 | } // track2 | |
1111 | track1 = (AliMUONTrack*) fRecTracksPtr->After(track1); | |
1112 | } // track1 | |
1113 | } | |
1114 | return; | |
1115 | } | |
1116 | ||
d837040f | 1117 | //__________________________________________________________________________ |
29f1b13a | 1118 | void AliMUONTrackReconstructor::UpdateTrackParamAtHit() |
d837040f | 1119 | { |
1120 | // Set track parameters after track fitting. Fill fTrackParamAtHit of AliMUONTrack's | |
1121 | AliMUONTrack *track; | |
1122 | AliMUONTrackHit *trackHit; | |
1123 | AliMUONTrackParam *trackParam; | |
1124 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1125 | while (track) { | |
1126 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); | |
1127 | while (trackHit) { | |
1128 | trackParam = trackHit->GetTrackParam(); | |
1129 | track->AddTrackParamAtHit(trackParam); | |
1130 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); | |
1131 | } // trackHit | |
1132 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1133 | } // track | |
1134 | return; | |
1135 | } | |
1136 | ||
b8dc484b | 1137 | //__________________________________________________________________________ |
29f1b13a | 1138 | void AliMUONTrackReconstructor::UpdateHitForRecAtHit() |
b8dc484b | 1139 | { |
1140 | // Set cluster parameterss after track fitting. Fill fHitForRecAtHit of AliMUONTrack's | |
1141 | AliMUONTrack *track; | |
1142 | AliMUONTrackHit *trackHit; | |
1143 | AliMUONHitForRec *hitForRec; | |
1144 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
1145 | while (track) { | |
1146 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->First(); | |
1147 | while (trackHit) { | |
1148 | hitForRec = trackHit->GetHitForRecPtr(); | |
1149 | track->AddHitForRecAtHit(hitForRec); | |
1150 | trackHit = (AliMUONTrackHit*) (track->GetTrackHitsPtr())->After(trackHit); | |
1151 | } // trackHit | |
1152 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
1153 | } // track | |
1154 | return; | |
1155 | } | |
1156 | ||
b035a148 | 1157 | //__________________________________________________________________________ |
29f1b13a | 1158 | void AliMUONTrackReconstructor::FillMUONTrack() |
b035a148 | 1159 | { |
1160 | // Set track parameters at hits for Kalman track. Fill fTrackParamAtHit of AliMUONTrack's | |
1161 | AliMUONTrackK *track; | |
1162 | track = (AliMUONTrackK*) fRecTracksPtr->First(); | |
1163 | while (track) { | |
1164 | track->FillMUONTrack(); | |
1165 | track = (AliMUONTrackK*) fRecTracksPtr->After(track); | |
1166 | } | |
1167 | return; | |
1168 | } | |
1169 | ||
8429a5e4 | 1170 | //__________________________________________________________________________ |
29f1b13a | 1171 | void AliMUONTrackReconstructor::EventDump(void) |
04b5ea16 | 1172 | { |
1173 | // Dump reconstructed event (track parameters at vertex and at first hit), | |
1174 | // and the particle parameters | |
1175 | ||
1176 | AliMUONTrack *track; | |
1177 | AliMUONTrackParam *trackParam, *trackParam1; | |
04b5ea16 | 1178 | Double_t bendingSlope, nonBendingSlope, pYZ; |
1179 | Double_t pX, pY, pZ, x, y, z, c; | |
5e671e06 | 1180 | Int_t trackIndex, nTrackHits; |
04b5ea16 | 1181 | |
b840996b | 1182 | AliDebug(1,"****** enter EventDump ******"); |
1183 | AliDebug(1, Form("Number of Reconstructed tracks : %d", fNRecTracks)); | |
1184 | ||
04b5ea16 | 1185 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole |
1186 | // Loop over reconstructed tracks | |
1187 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { | |
83dbc640 | 1188 | if (fTrackMethod != 1) continue; //AZ - skip the rest for now |
b840996b | 1189 | AliDebug(1, Form("track number: %d", trackIndex)); |
04b5ea16 | 1190 | // function for each track for modularity ???? |
1191 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); | |
1192 | nTrackHits = track->GetNTrackHits(); | |
b840996b | 1193 | AliDebug(1, Form("Number of track hits: %d ", nTrackHits)); |
04b5ea16 | 1194 | // track parameters at Vertex |
1195 | trackParam = track->GetTrackParamAtVertex(); | |
1196 | x = trackParam->GetNonBendingCoor(); | |
1197 | y = trackParam->GetBendingCoor(); | |
1198 | z = trackParam->GetZ(); | |
1199 | bendingSlope = trackParam->GetBendingSlope(); | |
1200 | nonBendingSlope = trackParam->GetNonBendingSlope(); | |
1201 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); | |
1202 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); | |
1203 | pX = pZ * nonBendingSlope; | |
1204 | pY = pZ * bendingSlope; | |
1205 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); | |
b840996b | 1206 | AliDebug(1, Form("Track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", |
1207 | z, x, y, pX, pY, pZ, c)); | |
04b5ea16 | 1208 | |
1209 | // track parameters at first hit | |
1210 | trackParam1 = ((AliMUONTrackHit*) | |
1211 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1212 | x = trackParam1->GetNonBendingCoor(); | |
1213 | y = trackParam1->GetBendingCoor(); | |
1214 | z = trackParam1->GetZ(); | |
1215 | bendingSlope = trackParam1->GetBendingSlope(); | |
1216 | nonBendingSlope = trackParam1->GetNonBendingSlope(); | |
1217 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); | |
1218 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); | |
1219 | pX = pZ * nonBendingSlope; | |
1220 | pY = pZ * bendingSlope; | |
1221 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); | |
b840996b | 1222 | AliDebug(1, Form("track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", |
1223 | z, x, y, pX, pY, pZ, c)); | |
04b5ea16 | 1224 | } |
8f373020 | 1225 | // informations about generated particles NO !!!!!!!! |
04b5ea16 | 1226 | |
88cb7938 | 1227 | // for (Int_t iPart = 0; iPart < np; iPart++) { |
1228 | // p = gAlice->Particle(iPart); | |
1229 | // printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", | |
1230 | // iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); | |
1231 | // } | |
a9e2aefa | 1232 | return; |
1233 | } | |
1234 | ||
276c44b7 | 1235 | |
1236 | //__________________________________________________________________________ | |
29f1b13a | 1237 | void AliMUONTrackReconstructor::EventDumpTrigger(void) |
276c44b7 | 1238 | { |
1239 | // Dump reconstructed trigger event | |
1240 | // and the particle parameters | |
1241 | ||
52c9bc11 | 1242 | AliMUONTriggerTrack *triggertrack ; |
1243 | Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast(); | |
276c44b7 | 1244 | |
b840996b | 1245 | AliDebug(1, "****** enter EventDumpTrigger ******"); |
1246 | AliDebug(1, Form("Number of Reconstructed tracks : %d ", nTriggerTracks)); | |
1247 | ||
276c44b7 | 1248 | // Loop over reconstructed tracks |
52c9bc11 | 1249 | for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) { |
1250 | triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex); | |
276c44b7 | 1251 | printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n", |
1252 | trackIndex, | |
1253 | triggertrack->GetX11(),triggertrack->GetY11(), | |
1254 | triggertrack->GetThetax(),triggertrack->GetThetay()); | |
1255 | } | |
1256 | } | |
1257 | ||
83dbc640 | 1258 | //__________________________________________________________________________ |
29f1b13a | 1259 | void AliMUONTrackReconstructor::MakeTrackCandidatesK(void) |
83dbc640 | 1260 | { |
1261 | // To make initial tracks for Kalman filter from the list of segments | |
1262 | Int_t istat, iseg; | |
1263 | AliMUONSegment *segment; | |
1264 | AliMUONTrackK *trackK; | |
1265 | ||
b840996b | 1266 | AliDebug(1,"Enter MakeTrackCandidatesK"); |
83dbc640 | 1267 | |
fff097e0 | 1268 | AliMUONTrackK a(this, fHitsForRecPtr); |
83dbc640 | 1269 | // Loop over stations(1...) 5 and 4 |
1270 | for (istat=4; istat>=3; istat--) { | |
1271 | // Loop over segments in the station | |
1272 | for (iseg=0; iseg<fNSegments[istat]; iseg++) { | |
1273 | // Transform segments to tracks and evaluate covariance matrix | |
1274 | segment = (AliMUONSegment*) ((*fSegmentsPtr[istat])[iseg]); | |
cc87ebcd | 1275 | trackK = new ((*fRecTracksPtr)[fNRecTracks++]) AliMUONTrackK(segment); |
83dbc640 | 1276 | } // for (iseg=0;...) |
1277 | } // for (istat=4;...) | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | //__________________________________________________________________________ | |
29f1b13a | 1282 | void AliMUONTrackReconstructor::FollowTracksK(void) |
83dbc640 | 1283 | { |
1284 | // Follow tracks using Kalman filter | |
30178c30 | 1285 | Bool_t ok; |
b035a148 | 1286 | Int_t icand, ichamBeg = 0, ichamEnd, chamBits; |
83dbc640 | 1287 | Double_t zDipole1, zDipole2; |
1288 | AliMUONTrackK *trackK; | |
1289 | AliMUONHitForRec *hit; | |
1290 | AliMUONRawCluster *clus; | |
1291 | TClonesArray *rawclusters; | |
83dbc640 | 1292 | clus = 0; rawclusters = 0; |
1293 | ||
b035a148 | 1294 | zDipole1 = GetSimpleBPosition() + GetSimpleBLength()/2; |
1295 | zDipole2 = zDipole1 - GetSimpleBLength(); | |
83dbc640 | 1296 | |
1297 | // Print hits | |
b035a148 | 1298 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[0]); |
8f373020 | 1299 | |
b035a148 | 1300 | if (trackK->DebugLevel() > 0) { |
1301 | for (Int_t i1=0; i1<fNHitsForRec; i1++) { | |
1302 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[i1]); | |
b035a148 | 1303 | printf(" Hit # %d %10.4f %10.4f %10.4f", |
1304 | hit->GetChamberNumber(), hit->GetBendingCoor(), | |
1305 | hit->GetNonBendingCoor(), hit->GetZ()); | |
8f373020 | 1306 | |
1307 | // from raw clusters | |
1308 | rawclusters = fMUONData->RawClusters(hit->GetChamberNumber()); | |
1309 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(hit-> | |
1310 | GetHitNumber()); | |
1311 | printf(" %d", clus->GetTrack(1)); | |
1312 | if (clus->GetTrack(2) != -1) printf(" %d \n", clus->GetTrack(2)); | |
1313 | else printf("\n"); | |
1314 | ||
83dbc640 | 1315 | } |
b035a148 | 1316 | } // if (trackK->DebugLevel() > 0) |
83dbc640 | 1317 | |
1318 | icand = -1; | |
b035a148 | 1319 | Int_t nSeeds; |
1320 | nSeeds = fNRecTracks; // starting number of seeds | |
83dbc640 | 1321 | // Loop over track candidates |
1322 | while (icand < fNRecTracks-1) { | |
1323 | icand ++; | |
b035a148 | 1324 | if (trackK->DebugLevel()>0) cout << " *** Kalman track candidate No. " << icand << endl; |
83dbc640 | 1325 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); |
b035a148 | 1326 | if (trackK->GetRecover() < 0) continue; // failed track |
83dbc640 | 1327 | |
1328 | // Discard candidate which will produce the double track | |
b035a148 | 1329 | /* |
83dbc640 | 1330 | if (icand > 0) { |
30178c30 | 1331 | ok = CheckCandidateK(icand,nSeeds); |
1332 | if (!ok) { | |
b035a148 | 1333 | trackK->SetRecover(-1); // mark candidate to be removed |
1334 | continue; | |
83dbc640 | 1335 | } |
1336 | } | |
b035a148 | 1337 | */ |
83dbc640 | 1338 | |
30178c30 | 1339 | ok = kTRUE; |
8f373020 | 1340 | if (trackK->GetRecover() == 0) |
1341 | hit = (AliMUONHitForRec*) trackK->GetTrackHits()->Last(); // last hit | |
1342 | else | |
1343 | hit = trackK->GetHitLastOk(); // hit where track stopped | |
1344 | ||
b035a148 | 1345 | if (hit) ichamBeg = hit->GetChamberNumber(); |
83dbc640 | 1346 | ichamEnd = 0; |
1347 | // Check propagation direction | |
cc87ebcd | 1348 | if (!hit) { ichamBeg = ichamEnd; AliFatal(" ??? "); } |
b035a148 | 1349 | else if (trackK->GetTrackDir() < 0) { |
83dbc640 | 1350 | ichamEnd = 9; // forward propagation |
30178c30 | 1351 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); |
1352 | if (ok) { | |
83dbc640 | 1353 | ichamBeg = ichamEnd; |
1354 | ichamEnd = 6; // backward propagation | |
1355 | // Change weight matrix and zero fChi2 for backpropagation | |
1356 | trackK->StartBack(); | |
b035a148 | 1357 | trackK->SetTrackDir(1); |
30178c30 | 1358 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); |
83dbc640 | 1359 | ichamBeg = ichamEnd; |
1360 | ichamEnd = 0; | |
1361 | } | |
1362 | } else { | |
1363 | if (trackK->GetBPFlag()) { | |
1364 | // backpropagation | |
1365 | ichamEnd = 6; // backward propagation | |
1366 | // Change weight matrix and zero fChi2 for backpropagation | |
1367 | trackK->StartBack(); | |
30178c30 | 1368 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kTRUE,zDipole1,zDipole2); |
83dbc640 | 1369 | ichamBeg = ichamEnd; |
1370 | ichamEnd = 0; | |
1371 | } | |
1372 | } | |
1373 | ||
30178c30 | 1374 | if (ok) { |
b035a148 | 1375 | trackK->SetTrackDir(1); |
83dbc640 | 1376 | trackK->SetBPFlag(kFALSE); |
30178c30 | 1377 | ok = trackK->KalmanFilter(ichamBeg,ichamEnd,kFALSE,zDipole1,zDipole2); |
83dbc640 | 1378 | } |
b035a148 | 1379 | if (!ok) { trackK->SetRecover(-1); continue; } // mark candidate to be removed |
1380 | ||
1381 | // Apply smoother | |
1382 | if (trackK->GetRecover() >= 0) { | |
1383 | ok = trackK->Smooth(); | |
1384 | if (!ok) trackK->SetRecover(-1); // mark candidate to be removed | |
1385 | } | |
83dbc640 | 1386 | |
1387 | // Majority 3 of 4 in first 2 stations | |
b035a148 | 1388 | if (!ok) continue; |
83dbc640 | 1389 | chamBits = 0; |
f29ba3e1 | 1390 | Double_t chi2max = 0; |
83dbc640 | 1391 | for (Int_t i=0; i<trackK->GetNTrackHits(); i++) { |
fff097e0 | 1392 | hit = (AliMUONHitForRec*) (*trackK->GetTrackHits())[i]; |
b035a148 | 1393 | chamBits |= BIT(hit->GetChamberNumber()); |
f29ba3e1 | 1394 | if (trackK->GetChi2PerPoint(i) > chi2max) chi2max = trackK->GetChi2PerPoint(i); |
83dbc640 | 1395 | } |
f29ba3e1 | 1396 | if (!((chamBits&3)==3 || (chamBits>>2&3)==3) && chi2max > 25) { |
b035a148 | 1397 | //trackK->Recover(); |
1398 | trackK->SetRecover(-1); //mark candidate to be removed | |
1399 | continue; | |
1400 | } | |
1401 | if (ok) trackK->SetTrackQuality(0); // compute "track quality" | |
83dbc640 | 1402 | } // while |
1403 | ||
1404 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1405 | trackK = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1406 | if (trackK->GetRecover() < 0) fRecTracksPtr->RemoveAt(i); | |
1407 | } | |
1408 | ||
1409 | // Compress TClonesArray | |
1410 | fRecTracksPtr->Compress(); | |
1411 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
1412 | return; | |
1413 | } | |
1414 | ||
1415 | //__________________________________________________________________________ | |
29f1b13a | 1416 | Bool_t AliMUONTrackReconstructor::CheckCandidateK(Int_t icand, Int_t nSeeds) const |
83dbc640 | 1417 | { |
1418 | // Discards track candidate if it will produce the double track (having | |
1419 | // the same seed segment hits as hits of a good track found before) | |
1420 | AliMUONTrackK *track1, *track2; | |
1421 | AliMUONHitForRec *hit1, *hit2, *hit; | |
1422 | ||
1423 | track1 = (AliMUONTrackK*) ((*fRecTracksPtr)[icand]); | |
fff097e0 | 1424 | hit1 = (AliMUONHitForRec*) (*track1->GetTrackHits())[0]; // 1'st hit |
1425 | hit2 = (AliMUONHitForRec*) (*track1->GetTrackHits())[1]; // 2'nd hit | |
83dbc640 | 1426 | |
1427 | for (Int_t i=0; i<icand; i++) { | |
1428 | track2 = (AliMUONTrackK*) ((*fRecTracksPtr)[i]); | |
1429 | //if (track2->GetRecover() < 0) continue; | |
1430 | if (track2->GetRecover() < 0 && icand >= nSeeds) continue; | |
1431 | ||
1432 | if (track1->GetStartSegment() == track2->GetStartSegment()) { | |
1433 | return kFALSE; | |
1434 | } else { | |
1435 | Int_t nSame = 0; | |
1436 | for (Int_t j=0; j<track2->GetNTrackHits(); j++) { | |
fff097e0 | 1437 | hit = (AliMUONHitForRec*) (*track2->GetTrackHits())[j]; |
83dbc640 | 1438 | if (hit == hit1 || hit == hit2) { |
1439 | nSame++; | |
1440 | if (nSame == 2) return kFALSE; | |
1441 | } | |
1442 | } // for (Int_t j=0; | |
1443 | } | |
1444 | } // for (Int_t i=0; | |
1445 | return kTRUE; | |
1446 | } | |
1447 | ||
1448 | //__________________________________________________________________________ | |
29f1b13a | 1449 | void AliMUONTrackReconstructor::RemoveDoubleTracksK(void) |
83dbc640 | 1450 | { |
1451 | // Removes double tracks (sharing more than half of their hits). Keeps | |
1452 | // the track with higher quality | |
1453 | AliMUONTrackK *track1, *track2, *trackToKill; | |
1454 | ||
1455 | // Sort tracks according to their quality | |
1456 | fRecTracksPtr->Sort(); | |
1457 | ||
1458 | // Loop over first track of the pair | |
1459 | track1 = (AliMUONTrackK*) fRecTracksPtr->First(); | |
b035a148 | 1460 | Int_t debug = track1->DebugLevel(); |
83dbc640 | 1461 | while (track1) { |
1462 | // Loop over second track of the pair | |
1463 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1464 | while (track2) { | |
1465 | // Check whether or not to keep track2 | |
1466 | if (!track2->KeepTrack(track1)) { | |
b035a148 | 1467 | if (debug >= 0) cout << " Killed track: " << 1/(*track2->GetTrackParameters())(4,0) << |
83dbc640 | 1468 | " " << track2->GetTrackQuality() << endl; |
1469 | trackToKill = track2; | |
1470 | track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1471 | trackToKill->Kill(); | |
1472 | fRecTracksPtr->Compress(); | |
1473 | } else track2 = (AliMUONTrackK*) fRecTracksPtr->After(track2); | |
1474 | } // track2 | |
1475 | track1 = (AliMUONTrackK*) fRecTracksPtr->After(track1); | |
1476 | } // track1 | |
1477 | ||
1478 | fNRecTracks = fRecTracksPtr->GetEntriesFast(); | |
b035a148 | 1479 | if (debug >= 0) cout << " Number of Kalman tracks: " << fNRecTracks << endl; |
83dbc640 | 1480 | } |
1481 | ||
1482 | //__________________________________________________________________________ | |
29f1b13a | 1483 | void AliMUONTrackReconstructor::GoToVertex(void) |
83dbc640 | 1484 | { |
1485 | // Propagates track to the vertex thru absorber | |
1486 | // (using Branson correction for now) | |
1487 | ||
1488 | Double_t zVertex; | |
1489 | zVertex = 0; | |
1490 | for (Int_t i=0; i<fNRecTracks; i++) { | |
1491 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->Branson(); | |
83dbc640 | 1492 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->SetTrackQuality(1); // compute Chi2 |
b035a148 | 1493 | //((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToZ(zVertex); // w/out absorber |
1494 | ((AliMUONTrackK*)(*fRecTracksPtr)[i])->GoToVertex(1); // with absorber | |
83dbc640 | 1495 | } |
1496 | } | |
b035a148 | 1497 | |
1498 | //__________________________________________________________________________ | |
29f1b13a | 1499 | void AliMUONTrackReconstructor::SetTrackMethod(Int_t iTrackMethod) |
b035a148 | 1500 | { |
1501 | // Set track method and recreate track container if necessary | |
1502 | ||
cc87ebcd | 1503 | fTrackMethod = TMath::Min (iTrackMethod, 3); |
1504 | fTrackMethod = TMath::Max (fTrackMethod, 1); | |
1505 | if (fTrackMethod != 1) { | |
b035a148 | 1506 | if (fRecTracksPtr) delete fRecTracksPtr; |
1507 | fRecTracksPtr = new TClonesArray("AliMUONTrackK", 10); | |
cc87ebcd | 1508 | if (fTrackMethod == 2) cout << " *** Tracking with the Kalman filter *** " << endl; |
1509 | else cout << " *** Combined cluster / track finder ***" << endl; | |
fff097e0 | 1510 | } else cout << " *** Original tracking *** " << endl; |
b035a148 | 1511 | |
1512 | } |