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32d38de2 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | TO CHECK | |
18 | GetBz usage | |
19 | ||
20 | */ | |
21 | ||
22 | //------------------------------------------------------------------------- | |
23 | // Implementation of the ITS Upgrade tracker mother class. | |
24 | //------------------------------------------------------------------------- | |
25 | #include <TTree.h> | |
26 | #include <Riostream.h> | |
27 | #include <TMath.h> | |
28 | ||
29 | #include "AliITSUTrackerGlo.h" | |
30 | #include "AliESDEvent.h" | |
31 | #include "AliESDtrack.h" | |
32 | #include "AliITSURecoDet.h" | |
33 | #include "AliITSURecoSens.h" | |
34 | #include "AliITSUReconstructor.h" | |
35 | #include "AliITSReconstructor.h" | |
36 | #include "AliITSUSeed.h" | |
37 | #include "AliITSUAux.h" | |
c61e50c3 | 38 | #include "AliITSUClusterPix.h" |
32d38de2 | 39 | using namespace AliITSUAux; |
40 | using namespace TMath; | |
41 | ||
42 | ||
e2d2481c | 43 | |
c8d1f258 | 44 | //----------------- tmp stuff ----------------- |
c8d1f258 | 45 | |
32d38de2 | 46 | ClassImp(AliITSUTrackerGlo) |
e2d2481c | 47 | |
48 | const Double_t AliITSUTrackerGlo::fgkToler = 1e-6;// tolerance for layer on-surface check | |
49 | ||
50 | ||
32d38de2 | 51 | //_________________________________________________________________________ |
52 | AliITSUTrackerGlo::AliITSUTrackerGlo(AliITSUReconstructor* rec) | |
53 | : fReconstructor(rec) | |
54 | ,fITS(0) | |
0091e9f0 | 55 | ,fCurrESDtrack(0) |
32d38de2 | 56 | ,fCurrMass(kPionMass) |
716ccba7 | 57 | ,fHypStore(100) |
58 | ,fCurrHyp(0) | |
c61e50c3 | 59 | ,fSeedsPool("AliITSUSeed",0) |
b8b59e05 | 60 | ,fFreeSeedsID(0) |
61 | ,fNFreeSeeds(0) | |
62 | ,fLastSeedID(0) | |
c8d1f258 | 63 | ,fTrCond() |
c51c3124 | 64 | ,fTrackPhase(-1) |
8b16dbae | 65 | ,fClInfo(0) |
32d38de2 | 66 | { |
67 | // Default constructor | |
68 | if (rec) Init(rec); | |
69 | } | |
70 | ||
71 | //_________________________________________________________________________ | |
72 | AliITSUTrackerGlo::~AliITSUTrackerGlo() | |
73 | { | |
74 | // Default destructor | |
75 | // | |
76 | delete fITS; | |
8b16dbae | 77 | delete[] fClInfo; |
32d38de2 | 78 | // |
79 | } | |
80 | ||
81 | //_________________________________________________________________________ | |
82 | void AliITSUTrackerGlo::Init(AliITSUReconstructor* rec) | |
83 | { | |
84 | // init with external reconstructor | |
c61e50c3 | 85 | // |
32d38de2 | 86 | fITS = new AliITSURecoDet(rec->GetGeom(),"ITSURecoInterface"); |
8b16dbae | 87 | int nLr = fITS->GetNLayersActive(); |
88 | fClInfo = new Int_t[nLr<<1]; | |
89 | for (int ilr=nLr;ilr--;) { | |
32d38de2 | 90 | fITS->GetLayerActive(ilr)->SetClusters(rec->GetClusters(ilr)); |
91 | } | |
c61e50c3 | 92 | // |
93 | fSeedsPool.ExpandCreateFast(1000); // RS TOCHECK | |
b8b59e05 | 94 | fFreeSeedsID.Set(1000); |
c61e50c3 | 95 | // |
c8d1f258 | 96 | fTrCond.SetNLayers(fITS->GetNLayersActive()); |
97 | fTrCond.AddNewCondition(5); | |
98 | fTrCond.AddGroupPattern( (0x1<<0)|(0x1<<1) ); | |
99 | fTrCond.AddGroupPattern( (0x1<<3)|(0x1<<4) ); | |
100 | fTrCond.AddGroupPattern( (0x1<<5)|(0x1<<6) ); | |
101 | // | |
102 | fTrCond.AddNewCondition(5); | |
103 | fTrCond.AddGroupPattern( (0x1<<0)|(0x1<<2) ); | |
104 | fTrCond.AddGroupPattern( (0x1<<3)|(0x1<<4) ); | |
105 | fTrCond.AddGroupPattern( (0x1<<5)|(0x1<<6) ); | |
106 | // | |
107 | fTrCond.AddNewCondition(5); | |
108 | fTrCond.AddGroupPattern( (0x1<<1)|(0x1<<2) ); | |
109 | fTrCond.AddGroupPattern( (0x1<<3)|(0x1<<4) ); | |
110 | fTrCond.AddGroupPattern( (0x1<<5)|(0x1<<6) ); | |
111 | // | |
112 | printf("Tracking Conditions: "); | |
113 | fTrCond.Print(); | |
32d38de2 | 114 | } |
115 | ||
116 | //_________________________________________________________________________ | |
117 | Int_t AliITSUTrackerGlo::Clusters2Tracks(AliESDEvent *esdEv) | |
118 | { | |
119 | // | |
120 | // | |
b8b59e05 | 121 | ResetSeedsPool(); |
c51c3124 | 122 | fTrackPhase = kClus2Tracks; |
716ccba7 | 123 | int nTrESD = esdEv->GetNumberOfTracks(); |
c51c3124 | 124 | AliInfo(Form("Will try to find prolongations for %d tracks",nTrESD)); |
125 | AliITSUReconstructor::GetRecoParam()->Print(); | |
716ccba7 | 126 | fHypStore.Delete(); |
127 | if (fHypStore.GetSize()<nTrESD) fHypStore.Expand(nTrESD+100); | |
128 | // | |
32d38de2 | 129 | fITS->ProcessClusters(); |
130 | // select ESD tracks to propagate | |
32d38de2 | 131 | for (int itr=0;itr<nTrESD;itr++) { |
132 | AliESDtrack *esdTr = esdEv->GetTrack(itr); | |
0091e9f0 | 133 | AliInfo(Form("Processing track %d | MCLabel: %d",itr,esdTr->GetTPCLabel())); |
c51c3124 | 134 | if (!NeedToProlong(esdTr)) continue; // are we interested in this track? |
716ccba7 | 135 | FindTrack(esdTr, itr); |
32d38de2 | 136 | } |
716ccba7 | 137 | // |
b8b59e05 | 138 | AliInfo(Form("SeedsPool: %d, BookedUpTo: %d, free: %d",fSeedsPool.GetSize(),fSeedsPool.GetEntriesFast(),fNFreeSeeds)); |
716ccba7 | 139 | fHypStore.Print(); |
3e4e3c23 | 140 | FinalizeHypotheses(); |
716ccba7 | 141 | // |
32d38de2 | 142 | return 0; |
143 | } | |
144 | ||
145 | //_________________________________________________________________________ | |
c51c3124 | 146 | Int_t AliITSUTrackerGlo::PropagateBack(AliESDEvent *esdEv) |
32d38de2 | 147 | { |
148 | // | |
c51c3124 | 149 | // Do outward fits in ITS |
150 | // | |
b8b59e05 | 151 | |
c51c3124 | 152 | fTrackPhase = kPropBack; |
153 | int nTrESD = esdEv->GetNumberOfTracks(); | |
154 | AliInfo(Form("Will fit %d tracks",nTrESD)); | |
155 | // | |
156 | double bz0 = GetBz(); | |
157 | Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()}; | |
158 | AliITSUTrackHyp dummyTr,*currTr=0; | |
159 | const double kWatchStep=10.; // for larger steps watch arc vs segment difference | |
160 | Double_t times[AliPID::kSPECIES]; | |
161 | // | |
162 | // | |
163 | for (int itr=0;itr<nTrESD;itr++) { | |
164 | AliESDtrack *esdTr = esdEv->GetTrack(itr); | |
165 | // Start time integral and add distance from current position to vertex | |
166 | if (esdTr->IsOn(AliESDtrack::kITSout)) continue; // already done | |
167 | // | |
168 | esdTr->GetXYZ(xyzTrk); | |
169 | Double_t dst = 0.; // set initial track lenght, tof | |
170 | { | |
171 | double dxs = xyzTrk[0] - xyzVtx[0]; | |
172 | double dys = xyzTrk[1] - xyzVtx[1]; | |
173 | double dzs = xyzTrk[2] - xyzVtx[2]; | |
174 | // RS: for large segment steps d use approximation of cicrular arc s by | |
175 | // s = 2R*asin(d/2R) = d/p asin(p) \approx d/p (p + 1/6 p^3) = d (1+1/6 p^2) | |
176 | // where R is the track radius, p = d/2R = 2C*d (C is the abs curvature) | |
177 | // Hence s^2/d^2 = (1+1/6 p^2)^2 | |
178 | dst = dxs*dxs + dys*dys; | |
179 | if (dst > kWatchStep*kWatchStep) { // correct circular part for arc/segment factor | |
180 | double crv = Abs(esdTr->GetC(bz0)); | |
181 | double fcarc = 1.+crv*crv*dst/6.; | |
182 | dst *= fcarc*fcarc; | |
183 | } | |
184 | dst += dzs*dzs; | |
185 | dst = Sqrt(dst); | |
186 | } | |
187 | // | |
188 | esdTr->SetStatus(AliESDtrack::kTIME); | |
189 | // | |
190 | if (!esdTr->IsOn(AliESDtrack::kITSin)) { // case of tracks w/o ITS prolongation: just set the time integration | |
e2d2481c | 191 | dummyTr.AliExternalTrackParam::operator=(*esdTr); |
c51c3124 | 192 | dummyTr.StartTimeIntegral(); |
e2d2481c | 193 | dummyTr.AddTimeStep(dst); |
c51c3124 | 194 | dummyTr.GetIntegratedTimes(times); |
195 | esdTr->SetIntegratedTimes(times); | |
196 | esdTr->SetIntegratedLength(dummyTr.GetIntegratedLength()); | |
197 | continue; | |
198 | } | |
199 | // | |
200 | currTr = GetTrackHyp(itr); | |
201 | currTr->StartTimeIntegral(); | |
202 | currTr->AddTimeStep(dst); | |
e2d2481c | 203 | printf("Before resetCov: "); currTr->AliExternalTrackParam::Print(); |
204 | currTr->ResetCovariance(10000); | |
c51c3124 | 205 | RefitTrack(currTr,fITS->GetRMax()); // propagate to exit from the ITS/TPC screen |
206 | // | |
207 | } | |
32d38de2 | 208 | // |
32d38de2 | 209 | return 0; |
210 | } | |
211 | ||
212 | //_________________________________________________________________________ | |
213 | Int_t AliITSUTrackerGlo::RefitInward(AliESDEvent * /*event*/) | |
214 | { | |
215 | // | |
216 | // To be implemented | |
217 | // | |
218 | ||
219 | Info("RefitInward","To be implemented"); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | //_________________________________________________________________________ | |
224 | Int_t AliITSUTrackerGlo::LoadClusters(TTree * treeRP) | |
225 | { | |
226 | // read from tree (if pointer provided) or directly from the ITS reco interface | |
227 | // | |
228 | return fReconstructor->LoadClusters(treeRP); | |
229 | } | |
230 | ||
231 | //_________________________________________________________________________ | |
232 | void AliITSUTrackerGlo::UnloadClusters() | |
233 | { | |
234 | // | |
235 | // To be implemented | |
236 | // | |
237 | ||
238 | Info("UnloadClusters","To be implemented"); | |
239 | } | |
240 | //_________________________________________________________________________ | |
241 | AliCluster * AliITSUTrackerGlo::GetCluster(Int_t /*index*/) const | |
242 | { | |
243 | // | |
244 | // To be implemented | |
245 | // | |
246 | ||
247 | Info("GetCluster","To be implemented"); | |
248 | return 0x0; | |
249 | } | |
250 | ||
251 | //_________________________________________________________________________ | |
252 | Bool_t AliITSUTrackerGlo::NeedToProlong(AliESDtrack* esdTr) | |
253 | { | |
254 | // do we need to match this track to ITS? | |
255 | // | |
256 | static double bz = GetBz(); | |
257 | if (!esdTr->IsOn(AliESDtrack::kTPCin) || | |
258 | esdTr->IsOn(AliESDtrack::kTPCout) || | |
259 | esdTr->IsOn(AliESDtrack::kITSin) || | |
260 | esdTr->GetKinkIndex(0)>0) return kFALSE; | |
261 | // | |
c61e50c3 | 262 | if (esdTr->Pt()<AliITSUReconstructor::GetRecoParam()->GetMinPtForProlongation()) return kFALSE; |
32d38de2 | 263 | // |
264 | float dtz[2]; | |
265 | esdTr->GetDZ(GetX(),GetY(),GetZ(),bz,dtz); | |
266 | // if track is not V0 candidata but has large offset wrt IP, reject it. RS TOCHECK | |
c61e50c3 | 267 | if ( !(esdTr->GetV0Index(0)>0 && dtz[0]>AliITSUReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()) |
268 | && (Abs(dtz[0])>AliITSUReconstructor::GetRecoParam()->GetMaxDForProlongation() || | |
269 | Abs(dtz[1])>AliITSUReconstructor::GetRecoParam()->GetMaxDZForProlongation())) return kFALSE; | |
32d38de2 | 270 | // |
271 | return kTRUE; | |
272 | } | |
273 | ||
274 | //_________________________________________________________________________ | |
716ccba7 | 275 | void AliITSUTrackerGlo::FindTrack(AliESDtrack* esdTr, Int_t esdID) |
32d38de2 | 276 | { |
277 | // find prolongaion candidates finding for single seed | |
278 | // | |
3e4e3c23 | 279 | AliITSUSeed seedUC; // copy of the seed from the upper layer |
280 | AliITSUSeed seedT; // transient seed between the seedUC and new prolongation hypothesis | |
281 | // | |
3e4e3c23 | 282 | if (!InitHypothesis(esdTr,esdID)) return; // initialize prolongations hypotheses tree |
32d38de2 | 283 | // |
173b3073 | 284 | AliITSURecoSens *hitSens[AliITSURecoSens::kNNeighbors+1]; |
f8832015 | 285 | // |
c61e50c3 | 286 | TObjArray clArr; // container for transfer of clusters matching to seed |
32d38de2 | 287 | // |
3e4e3c23 | 288 | int nLrActive = fITS->GetNLayersActive(); |
289 | for (int ila=nLrActive;ila--;) { | |
32d38de2 | 290 | int ilaUp = ila+1; // prolong seeds from layer above |
3e4e3c23 | 291 | // |
292 | // for the outermost layer the seed is created from the ESD track | |
293 | int nSeedsUp = (ilaUp==nLrActive) ? 1 : fCurrHyp->GetNSeeds(ilaUp); | |
294 | // | |
32d38de2 | 295 | for (int isd=0;isd<nSeedsUp;isd++) { |
3e4e3c23 | 296 | AliITSUSeed* seedU; |
297 | if (ilaUp==nLrActive) { | |
298 | seedU = 0; | |
299 | seedUC.InitFromESDTrack(esdTr); | |
300 | } | |
301 | else { | |
302 | seedU = fCurrHyp->GetSeed(ilaUp,isd); // seed on prev.active layer to prolong | |
303 | seedUC = *seedU; // its copy will be prolonged | |
b8b59e05 | 304 | seedUC.SetParent(seedU); |
3e4e3c23 | 305 | } |
943e1898 | 306 | seedUC.ResetFMatrix(); // reset the matrix for propagation to next layer |
32d38de2 | 307 | // go till next active layer |
c8d1f258 | 308 | AliInfo(Form("working on Lr:%d Seed:%d of %d",ila,isd,nSeedsUp)); |
f8832015 | 309 | if (!TransportToLayer(&seedUC, fITS->GetLrIDActive(ilaUp), fITS->GetLrIDActive(ila)) ) { |
32d38de2 | 310 | // |
0091e9f0 | 311 | AliInfo("Transport failed"); |
32d38de2 | 312 | // Check if the seed satisfies to track definition |
b8b59e05 | 313 | if (NeedToKill(&seedUC,kTransportFailed) && seedU) KillSeed(seedU,kTRUE); |
32d38de2 | 314 | continue; // RS TODO: decide what to do with tracks stopped on higher layers w/o killing |
315 | } | |
316 | AliITSURecoLayer* lrA = fITS->GetLayerActive(ila); | |
f8832015 | 317 | if (!GetRoadWidth(&seedUC, ila)) { // failed to find road width on the layer |
b8b59e05 | 318 | if (NeedToKill(&seedUC,kRWCheckFailed) && seedU) KillSeed(seedU,kTRUE); |
32d38de2 | 319 | continue; |
320 | } | |
173b3073 | 321 | int nsens = lrA->FindSensors(&fTrImpData[kTrPhi0], hitSens); // find detectors which may be hit by the track |
0091e9f0 | 322 | AliInfo(Form("Will check %d sensors on lr:%d ",nsens,ila)); |
32d38de2 | 323 | // |
943e1898 | 324 | double bz = GetBz(); |
32d38de2 | 325 | for (int isn=nsens;isn--;) { |
f8832015 | 326 | seedT = seedUC; |
c61e50c3 | 327 | AliITSURecoSens* sens = hitSens[isn]; |
f8832015 | 328 | // |
943e1898 | 329 | // We need to propagate the seed to sensor on lrA staying the frame of the sensor from prev.layer, |
330 | // since the transport matrix should be defined in this frame. | |
331 | double xs; // X in the TF of current seed, corresponding to intersection with sensor plane | |
332 | if (!seedT.GetTrackingXAtXAlpha(sens->GetXTF(),sens->GetPhiTF(),bz, xs)) continue; | |
8b16dbae | 333 | if (!PropagateSeed(&seedT,xs,fCurrMass)) continue; |
334 | // if (!seedT.PropagateToX(xs,bz)) continue; | |
716ccba7 | 335 | // if (!seedT.Rotate(sens->GetPhiTF())) continue; |
336 | if (!seedT.RotateToAlpha(sens->GetPhiTF())) continue; | |
943e1898 | 337 | // |
f8832015 | 338 | int clID0 = sens->GetFirstClusterId(); |
c61e50c3 | 339 | for (int icl=sens->GetNClusters();icl--;) { |
f8832015 | 340 | int res = CheckCluster(&seedT,ila,clID0+icl); |
341 | // | |
342 | if (res==kStopSearchOnSensor) break; // stop looking on this sensor | |
343 | if (res==kClusterNotMatching) continue; // cluster does not match | |
344 | // cluster is matching and it was added to the hypotheses tree | |
c61e50c3 | 345 | } |
32d38de2 | 346 | } |
f8832015 | 347 | // cluster search is done. Do we need ta have a version of this seed skipping current layer |
348 | seedT.SetLr(ila); | |
716ccba7 | 349 | if (!NeedToKill(&seedT,kMissingCluster)) { |
350 | AliITSUSeed* seedSkp = NewSeedFromPool(&seedT); | |
351 | double penalty = -AliITSUReconstructor::GetRecoParam()->GetMissPenalty(ila); | |
352 | // to do: make penalty to account for probability to miss the cluster for good reason | |
353 | seedSkp->SetChi2Cl(penalty); | |
354 | AddProlongationHypothesis(seedSkp,ila); | |
355 | } | |
32d38de2 | 356 | } |
716ccba7 | 357 | ((TObjArray*)fCurrHyp->GetLayerSeeds(ila))->Sort(); |
c8d1f258 | 358 | printf(">>> All hypotheses on lr %d: \n",ila); |
716ccba7 | 359 | for (int ih=0;ih<fCurrHyp->GetNSeeds(ila);ih++) { |
360 | printf(" #%3d ",ih); fCurrHyp->GetSeed(ila,ih)->Print(); | |
361 | // | |
362 | /* | |
363 | if (ila!=0) continue; | |
364 | double vecL[5] = {0}; | |
365 | double matL[15] = {0}; | |
366 | AliITSUSeed* sp = fCurrHyp->GetSeed(ila,ih); | |
367 | while(sp->GetParent()) { | |
368 | sp->Smooth(vecL,matL); | |
369 | if (sp->GetLayerID()>=fITS->GetNLayersActive()-1) break; | |
370 | sp = (AliITSUSeed*)sp->GetParent(); | |
371 | } | |
372 | */ | |
c8d1f258 | 373 | } |
32d38de2 | 374 | } |
375 | // | |
716ccba7 | 376 | SaveCurrentTrackHypotheses(); |
377 | // | |
32d38de2 | 378 | } |
379 | ||
380 | //_________________________________________________________________________ | |
3e4e3c23 | 381 | Bool_t AliITSUTrackerGlo::InitHypothesis(AliESDtrack *esdTr, Int_t esdID) |
32d38de2 | 382 | { |
c61e50c3 | 383 | // init prolongaion candidates finding for single seed |
716ccba7 | 384 | fCurrHyp = GetTrackHyp(esdID); |
385 | if (fCurrHyp) return kTRUE; | |
386 | // | |
32d38de2 | 387 | fCurrMass = esdTr->GetMass(); |
0091e9f0 | 388 | fCurrESDtrack = esdTr; |
32d38de2 | 389 | if (fCurrMass<kPionMass*0.9) fCurrMass = kPionMass; // don't trust to mu, e identification from TPCin |
c61e50c3 | 390 | // |
3e4e3c23 | 391 | fCurrHyp = new AliITSUTrackHyp(fITS->GetNLayersActive()); |
392 | fCurrHyp->SetESDTrack(esdTr); | |
716ccba7 | 393 | fCurrHyp->SetUniqueID(esdID); |
c51c3124 | 394 | fCurrHyp->SetMass(fCurrMass); |
716ccba7 | 395 | SetTrackHyp(fCurrHyp,esdID); |
3e4e3c23 | 396 | // |
32d38de2 | 397 | return kTRUE; |
398 | // TO DO | |
399 | } | |
400 | ||
401 | //_________________________________________________________________________ | |
402 | Bool_t AliITSUTrackerGlo::TransportToLayer(AliITSUSeed* seed, Int_t lFrom, Int_t lTo) | |
403 | { | |
404 | // transport seed from layerFrom to the entrance of layerTo | |
405 | // | |
8b16dbae | 406 | // |
407 | if (lTo==lFrom) AliFatal(Form("was called with lFrom=%d lTo=%d",lFrom,lTo)); | |
408 | // | |
32d38de2 | 409 | int dir = lTo > lFrom ? 1:-1; |
410 | AliITSURecoLayer* lrFr = fITS->GetLayer(lFrom); // this can be 0 when extrapolation from TPC to ITS is requested | |
411 | Bool_t checkFirst = kTRUE; | |
412 | while(lFrom!=lTo) { | |
32d38de2 | 413 | if (lrFr) { |
e2d2481c | 414 | if (!GoToExitFromLayer(seed,lrFr,dir,checkFirst)) return kFALSE; // go till the end of current layer |
415 | checkFirst = kFALSE; | |
32d38de2 | 416 | } |
417 | AliITSURecoLayer* lrTo = fITS->GetLayer( (lFrom+=dir) ); | |
418 | if (!lrTo) AliFatal(Form("Layer %d does not exist",lFrom)); | |
419 | // | |
420 | // go the entrance of the layer, assuming no materials in between | |
8b16dbae | 421 | double xToGo = lrTo->GetR(-dir); |
dde91d5d | 422 | if (!seed->GetXatLabR(xToGo,xToGo,GetBz(),dir)) return kFALSE; |
44785f3e | 423 | if (!PropagateSeed(seed,xToGo,fCurrMass,100, kFALSE )) return kFALSE; |
32d38de2 | 424 | lrFr = lrTo; |
425 | } | |
426 | return kTRUE; | |
427 | // | |
428 | } | |
429 | ||
3e4e3c23 | 430 | //_________________________________________________________________________ |
431 | Bool_t AliITSUTrackerGlo::TransportToLayer(AliExternalTrackParam* seed, Int_t lFrom, Int_t lTo) | |
432 | { | |
433 | // transport track from layerFrom to the entrance of layerTo | |
434 | // | |
8b16dbae | 435 | if (lTo==lFrom) AliFatal(Form("was called with lFrom=%d lTo=%d",lFrom,lTo)); |
436 | // | |
3e4e3c23 | 437 | int dir = lTo > lFrom ? 1:-1; |
438 | AliITSURecoLayer* lrFr = fITS->GetLayer(lFrom); // this can be 0 when extrapolation from TPC to ITS is requested | |
439 | Bool_t checkFirst = kTRUE; | |
440 | while(lFrom!=lTo) { | |
3e4e3c23 | 441 | if (lrFr) { |
e2d2481c | 442 | if (!GoToExitFromLayer(seed,lrFr,dir,checkFirst)) return kFALSE; // go till the end of current layer |
443 | checkFirst = kFALSE; | |
3e4e3c23 | 444 | } |
445 | AliITSURecoLayer* lrTo = fITS->GetLayer( (lFrom+=dir) ); | |
446 | if (!lrTo) AliFatal(Form("Layer %d does not exist",lFrom)); | |
447 | // | |
e2d2481c | 448 | if (!GoToExitFromLayer(seed,lrTo,dir)) return kFALSE; // go the entrance of the layer, assuming no materials in between |
3e4e3c23 | 449 | lrFr = lrTo; |
450 | } | |
451 | return kTRUE; | |
452 | // | |
453 | } | |
454 | ||
e2d2481c | 455 | //_________________________________________________________________________ |
456 | Bool_t AliITSUTrackerGlo::GoToExitFromLayer(AliITSUSeed* seed, AliITSURecoLayer* lr, Int_t dir, Bool_t check) | |
457 | { | |
458 | // go to the exit from lr in direction dir, applying material corrections in steps specific for this layer | |
459 | // If check is requested, do this only provided the track has not exited the layer already | |
460 | double xToGo = lr->GetR(dir); | |
461 | if (check) { // do we need to track till the surface of the current layer ? | |
462 | double curR2 = seed->GetX()*seed->GetX() + seed->GetY()*seed->GetY(); // current radius | |
463 | if (dir>0) { if (curR2-xToGo*xToGo>fgkToler) return kTRUE; } // on the surface or outside of the layer | |
464 | else if (dir<0) { if (xToGo*xToGo-curR2>fgkToler) return kTRUE; } // on the surface or outside of the layer | |
465 | } | |
466 | if (!seed->GetXatLabR(xToGo,xToGo,GetBz(),dir)) return kFALSE; | |
467 | // go via layer to its boundary, applying material correction. | |
468 | if (!PropagateSeed(seed,xToGo,fCurrMass, lr->GetMaxStep())) return kFALSE; | |
469 | return kTRUE; | |
470 | // | |
471 | } | |
472 | ||
473 | //_________________________________________________________________________ | |
474 | Bool_t AliITSUTrackerGlo::GoToExitFromLayer(AliExternalTrackParam* seed, AliITSURecoLayer* lr, Int_t dir, Bool_t check) | |
475 | { | |
476 | // go to the exit from lr in direction dir, applying material corrections in steps specific for this layer | |
477 | // If check is requested, do this only provided the track has not exited the layer already | |
478 | double xToGo = lr->GetR(dir); | |
479 | if (check) { // do we need to track till the surface of the current layer ? | |
480 | double curR2 = seed->GetX()*seed->GetX() + seed->GetY()*seed->GetY(); // current radius | |
481 | if (dir>0) { if (curR2-xToGo*xToGo>fgkToler) return kTRUE; } // on the surface or outside of the layer | |
482 | else if (dir<0) { if (xToGo*xToGo-curR2>fgkToler) return kTRUE; } // on the surface or outside of the layer | |
483 | } | |
484 | if (!seed->GetXatLabR(xToGo,xToGo,GetBz(),dir)) return kFALSE; | |
485 | // go via layer to its boundary, applying material correction. | |
486 | if (!PropagateSeed(seed,xToGo,fCurrMass, lr->GetMaxStep())) return kFALSE; | |
487 | return kTRUE; | |
488 | // | |
489 | } | |
490 | ||
491 | ||
492 | //_________________________________________________________________________ | |
493 | Bool_t AliITSUTrackerGlo::GoToEntranceToLayer(AliITSUSeed* seed, AliITSURecoLayer* lr, Int_t dir, Bool_t check) | |
494 | { | |
495 | // go to the entrance of lr in direction dir, w/o applying material corrections. | |
496 | // If check is requested, do this only provided the track did not reach the layer already | |
497 | double xToGo = lr->GetR(-dir); | |
498 | if (check) { // do we need to track till the surface of the current layer ? | |
499 | double curR2 = seed->GetX()*seed->GetX() + seed->GetY()*seed->GetY(); // current radius | |
500 | if (dir>0) { if (curR2-xToGo*xToGo>fgkToler) return kTRUE; } // already passed | |
501 | else if (dir<0) { if (xToGo*xToGo-curR2>fgkToler) return kTRUE; } // already passed | |
502 | } | |
503 | if (!seed->GetXatLabR(xToGo,xToGo,GetBz(),dir)) return kFALSE; | |
504 | // go via layer to its boundary, applying material correction. | |
505 | if (!PropagateSeed(seed,xToGo,fCurrMass, 100, kFALSE)) return kFALSE; | |
506 | return kTRUE; | |
507 | // | |
508 | } | |
509 | ||
510 | //_________________________________________________________________________ | |
511 | Bool_t AliITSUTrackerGlo::GoToEntranceToLayer(AliExternalTrackParam* seed, AliITSURecoLayer* lr, Int_t dir, Bool_t check) | |
512 | { | |
513 | // go to the entrance of lr in direction dir, w/o applying material corrections. | |
514 | // If check is requested, do this only provided the track did not reach the layer already | |
515 | double xToGo = lr->GetR(-dir); | |
516 | if (check) { // do we need to track till the surface of the current layer ? | |
517 | double curR2 = seed->GetX()*seed->GetX() + seed->GetY()*seed->GetY(); // current radius | |
518 | if (dir>0) { if (curR2-xToGo*xToGo>fgkToler) return kTRUE; } // already passed | |
519 | else if (dir<0) { if (xToGo*xToGo-curR2>fgkToler) return kTRUE; } // already passed | |
520 | } | |
521 | if (!seed->GetXatLabR(xToGo,xToGo,GetBz(),dir)) return kFALSE; | |
522 | // go via layer to its boundary, applying material correction. | |
523 | if (!PropagateSeed(seed,xToGo,fCurrMass, 100, kFALSE)) return kFALSE; | |
524 | return kTRUE; | |
525 | // | |
526 | } | |
527 | ||
32d38de2 | 528 | //_________________________________________________________________________ |
c61e50c3 | 529 | Bool_t AliITSUTrackerGlo::GetRoadWidth(AliITSUSeed* seed, int ilrA) |
32d38de2 | 530 | { |
531 | // calculate road width in terms of phi and z for the track which MUST be on the external radius of the layer | |
532 | // as well as some aux info | |
533 | double bz = GetBz(); | |
534 | AliITSURecoLayer* lrA = fITS->GetLayerActive(ilrA); | |
c61e50c3 | 535 | seed->GetXYZ(&fTrImpData[kTrXIn]); // lab position at the entrance from above |
943e1898 | 536 | static AliExternalTrackParam sc; // seed copy for manipalitions |
537 | sc = *seed; | |
32d38de2 | 538 | // |
c61e50c3 | 539 | fTrImpData[kTrPhiIn] = ATan2(fTrImpData[kTrYIn],fTrImpData[kTrXIn]); |
943e1898 | 540 | if (!sc.Rotate(fTrImpData[kTrPhiIn])) return kFALSE; // go to the frame of the entry point into the layer |
c61e50c3 | 541 | double dr = lrA->GetDR(); // approximate X dist at the inner radius |
943e1898 | 542 | if (!sc.GetXYZAt(sc.GetX()-dr, bz, fTrImpData + kTrXOut)) { |
32d38de2 | 543 | // special case: track does not reach inner radius, might be tangential |
943e1898 | 544 | double r = sc.GetD(0,0,bz); |
32d38de2 | 545 | double x; |
943e1898 | 546 | if (!sc.GetXatLabR(r,x,bz,-1)) { |
547 | sc.Print(); | |
548 | AliFatal(Form("This should not happen: r=%f",r)); | |
32d38de2 | 549 | } |
943e1898 | 550 | dr = Abs(sc.GetX() - x); |
551 | if (!sc.GetXYZAt(x, bz, fTrImpData + kTrXOut)) { | |
552 | sc.Print(); | |
553 | AliFatal(Form("This should not happen: x=%f",x)); | |
32d38de2 | 554 | } |
555 | } | |
556 | // | |
c61e50c3 | 557 | fTrImpData[kTrPhiOut] = ATan2(fTrImpData[kTrYOut],fTrImpData[kTrXOut]); |
943e1898 | 558 | double sgy = sc.GetSigmaY2() + dr*dr*sc.GetSigmaSnp2() + AliITSUReconstructor::GetRecoParam()->GetSigmaY2(ilrA); |
559 | double sgz = sc.GetSigmaZ2() + dr*dr*sc.GetSigmaTgl2() + AliITSUReconstructor::GetRecoParam()->GetSigmaZ2(ilrA); | |
c61e50c3 | 560 | sgy = Sqrt(sgy)*AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadY(); |
561 | sgz = Sqrt(sgz)*AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadZ(); | |
562 | fTrImpData[kTrPhi0] = 0.5*(fTrImpData[kTrPhiOut]+fTrImpData[kTrPhiIn]); | |
173b3073 | 563 | fTrImpData[kTrZ0] = 0.5*(fTrImpData[kTrZOut]+fTrImpData[kTrZIn]); |
c61e50c3 | 564 | fTrImpData[kTrDPhi] = 0.5*Abs(fTrImpData[kTrPhiOut]-fTrImpData[kTrPhiIn]) + sgy/lrA->GetR(); |
173b3073 | 565 | fTrImpData[kTrDZ] = 0.5*Abs(fTrImpData[kTrZOut]-fTrImpData[kTrZIn]) + sgz; |
32d38de2 | 566 | // |
567 | return kTRUE; | |
568 | } | |
569 | ||
b8b59e05 | 570 | //________________________________________ |
571 | void AliITSUTrackerGlo::ResetSeedsPool() | |
572 | { | |
573 | // mark all seeds in the pool as unused | |
574 | AliInfo(Form("CurrentSize: %d, BookedUpTo: %d, free: %d",fSeedsPool.GetSize(),fSeedsPool.GetEntriesFast(),fNFreeSeeds)); | |
575 | fNFreeSeeds = 0; | |
576 | fSeedsPool.Clear(); // seeds don't allocate memory | |
577 | } | |
578 | ||
579 | ||
580 | //________________________________________ | |
581 | void AliITSUTrackerGlo::MarkSeedFree(AliITSUSeed *sd) | |
32d38de2 | 582 | { |
b8b59e05 | 583 | // account that this seed is "deleted" |
584 | int id = sd->GetPoolID(); | |
585 | if (id<0) { | |
586 | AliError(Form("Freeing of seed %p NOT from the pool is requested",sd)); | |
587 | return; | |
588 | } | |
589 | // AliInfo(Form("%d %p",id, seed)); | |
590 | fSeedsPool.RemoveAt(id); | |
591 | if (fFreeSeedsID.GetSize()<=fNFreeSeeds) fFreeSeedsID.Set( 2*fNFreeSeeds + 100 ); | |
592 | fFreeSeedsID.GetArray()[fNFreeSeeds++] = id; | |
32d38de2 | 593 | } |
f8832015 | 594 | |
595 | //_________________________________________________________________________ | |
596 | Int_t AliITSUTrackerGlo::CheckCluster(AliITSUSeed* track, Int_t lr, Int_t clID) | |
597 | { | |
598 | // Check if the cluster (in tracking frame!) is matching to track. | |
599 | // The track must be already propagated to sensor tracking frame. | |
600 | // Returns: kStopSearchOnSensor if the search on given sensor should be stopped, | |
601 | // kClusterMatching if the cluster is matching | |
602 | // kClusterMatching otherwise | |
603 | // | |
f8832015 | 604 | const double kTolerX = 5e-4; |
605 | AliCluster *cl = fITS->GetLayerActive(lr)->GetCluster(clID); | |
606 | // | |
c8d1f258 | 607 | Bool_t goodCl = kFALSE; |
716ccba7 | 608 | int currLabel = Abs(fCurrESDtrack->GetTPCLabel()); |
609 | // | |
8b16dbae | 610 | if (cl->GetLabel(0)>=0) { |
611 | for (int i=0;i<3;i++) if (cl->GetLabel(i)>=0 && cl->GetLabel(i)==currLabel) {goodCl = kTRUE; break;} | |
612 | } | |
716ccba7 | 613 | else goodCl = kTRUE; |
c8d1f258 | 614 | // |
f8832015 | 615 | if (TMath::Abs(cl->GetX())>kTolerX) { // if due to the misalingment X is large, propagate track only |
c8d1f258 | 616 | if (!track->PropagateParamOnlyTo(track->GetX()+cl->GetX(),GetBz())) { |
3dd9c283 | 617 | if (goodCl) {printf("Loose good cl: Failed propagation. |"); cl->Print();} |
c8d1f258 | 618 | return kStopSearchOnSensor; // propagation failed, seedT is intact |
619 | } | |
f8832015 | 620 | } |
3dd9c283 | 621 | double dy = cl->GetY()-track->GetY(); |
c8d1f258 | 622 | double dz = cl->GetZ()-track->GetZ(); |
0091e9f0 | 623 | // |
f8832015 | 624 | double dy2 = dy*dy; |
625 | double tol2 = (track->GetSigmaY2() + AliITSUReconstructor::GetRecoParam()->GetSigmaY2(lr))* | |
626 | AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadY()*AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadY(); // RS TOOPTIMIZE | |
627 | if (dy2>tol2) { // the clusters are sorted in Z(col) then in Y(row). | |
3dd9c283 | 628 | if (goodCl) {printf("Loose good cl: dy2=%e > tol2=%e |",dy2,tol2); cl->Print();} |
f8832015 | 629 | if (dy>0) return kStopSearchOnSensor; // No chance that other cluster of this sensor will match (all Y's will be even larger) |
630 | else return kClusterNotMatching; // Other clusters may match | |
631 | } | |
c8d1f258 | 632 | double dz2 = dz*dz; |
f8832015 | 633 | tol2 = (track->GetSigmaZ2() + AliITSUReconstructor::GetRecoParam()->GetSigmaZ2(lr))* |
634 | AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadZ()*AliITSUReconstructor::GetRecoParam()->GetNSigmaRoadZ(); // RS TOOPTIMIZE | |
c8d1f258 | 635 | if (dz2>tol2) { |
3dd9c283 | 636 | if (goodCl) {printf("Loose good cl: dz2=%e > tol2=%e |",dz2,tol2); cl->Print();} |
c8d1f258 | 637 | return kClusterNotMatching; // Other clusters may match |
638 | } | |
f8832015 | 639 | // |
640 | // check chi2 | |
641 | Double_t p[2]={cl->GetY(), cl->GetZ()}; | |
642 | Double_t cov[3]={cl->GetSigmaY2(), cl->GetSigmaYZ(), cl->GetSigmaZ2()}; | |
643 | double chi2 = track->GetPredictedChi2(p,cov); | |
c8d1f258 | 644 | if (chi2>AliITSUReconstructor::GetRecoParam()->GetMaxTr2ClChi2(lr)) { |
3dd9c283 | 645 | if (goodCl) { |
716ccba7 | 646 | printf("Loose good cl: Chi2=%e > Chi2Max=%e |dy: %+.3e dz: %+.3e\n", |
647 | chi2,AliITSUReconstructor::GetRecoParam()->GetMaxTr2ClChi2(lr),dy,dz); | |
3dd9c283 | 648 | track->Print("etp"); |
649 | cl->Print(""); | |
650 | } | |
c8d1f258 | 651 | return kClusterNotMatching; |
652 | } | |
f8832015 | 653 | // |
654 | track = NewSeedFromPool(track); // input track will be reused, use its clone for updates | |
943e1898 | 655 | if (!track->Update()) { |
3dd9c283 | 656 | if (goodCl) {printf("Loose good cl: Failed update |"); cl->Print();} |
b8b59e05 | 657 | MarkSeedFree(track); |
c8d1f258 | 658 | return kClusterNotMatching; |
659 | } | |
f8832015 | 660 | track->SetChi2Cl(chi2); |
661 | track->SetLrClusterID(lr,clID); | |
662 | cl->IncreaseClusterUsage(); | |
663 | // | |
716ccba7 | 664 | track->SetFake(!goodCl); |
665 | // | |
666 | AliInfo(Form("AddCl(%d) Cl%d lr:%d: dY:%+8.4f dZ:%+8.4f (MC: %5d %5d %5d) |Chi2=%f(%c)", | |
667 | goodCl,clID,lr,dy,dz2,cl->GetLabel(0),cl->GetLabel(1),cl->GetLabel(2), chi2, track->IsFake() ? '-':'+')); | |
c8d1f258 | 668 | // |
f8832015 | 669 | AddProlongationHypothesis(track,lr); |
670 | // | |
671 | return kClusterMatching; | |
672 | } | |
c8d1f258 | 673 | |
674 | //_________________________________________________________________________ | |
675 | Bool_t AliITSUTrackerGlo::NeedToKill(AliITSUSeed *seed, Int_t flag) | |
676 | { | |
677 | // check if the seed should not be discarded | |
678 | const UShort_t kMask = 0xffff; | |
679 | if (flag==kMissingCluster) { | |
680 | int lastChecked = seed->GetLayerID(); | |
681 | UShort_t patt = seed->GetHitsPattern(); | |
682 | if (lastChecked) patt |= ~(kMask<<lastChecked); // not all layers were checked, complete unchecked once by potential hits | |
683 | Bool_t seedOK = fTrCond.CheckPattern(patt); | |
684 | return !seedOK; | |
685 | } | |
686 | return kTRUE; | |
687 | } | |
44785f3e | 688 | |
689 | //______________________________________________________________________________ | |
690 | Bool_t AliITSUTrackerGlo::PropagateSeed(AliITSUSeed *seed, Double_t xToGo, Double_t mass, Double_t maxStep, Bool_t matCorr) | |
691 | { | |
692 | // propagate seed to given x applying material correction if requested | |
693 | const Double_t kEpsilon = 1e-5; | |
694 | Double_t xpos = seed->GetX(); | |
695 | Int_t dir = (xpos<xToGo) ? 1:-1; | |
696 | Double_t xyz0[3],xyz1[3],param[7]; | |
697 | // | |
8b16dbae | 698 | Bool_t updTime = dir>0 && seed->IsStartedTimeIntegral(); |
f497470c | 699 | if (matCorr || updTime) seed->GetXYZ(xyz1); //starting global position |
44785f3e | 700 | while ( (xToGo-xpos)*dir > kEpsilon){ |
701 | Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos), maxStep); | |
702 | Double_t x = xpos+step; | |
703 | Double_t bz=GetBz(); // getting the local Bz | |
704 | if (!seed->PropagateToX(x,bz)) return kFALSE; | |
8b16dbae | 705 | double ds = 0; |
706 | if (matCorr || updTime) { | |
44785f3e | 707 | xyz0[0]=xyz1[0]; // global pos at the beginning of step |
708 | xyz0[1]=xyz1[1]; | |
709 | xyz0[2]=xyz1[2]; | |
710 | seed->GetXYZ(xyz1); // // global pos at the end of step | |
8b16dbae | 711 | if (matCorr) { |
712 | MeanMaterialBudget(xyz0,xyz1,param); | |
713 | Double_t xrho=param[0]*param[4], xx0=param[1]; | |
714 | if (dir>0) xrho = -xrho; // outward should be negative | |
715 | if (!seed->ApplyMaterialCorrection(xx0,xrho,mass,kFALSE)) return kFALSE; | |
716 | ds = param[4]; | |
717 | } | |
718 | else { // matCorr is not requested but time integral is | |
719 | double d0 = xyz1[0]-xyz0[0]; | |
720 | double d1 = xyz1[1]-xyz0[1]; | |
721 | double d2 = xyz1[2]-xyz0[2]; | |
722 | ds = TMath::Sqrt(d0*d0+d1*d1+d2*d2); | |
723 | } | |
44785f3e | 724 | } |
8b16dbae | 725 | if (updTime) seed->AddTimeStep(ds); |
44785f3e | 726 | xpos = seed->GetX(); |
727 | } | |
728 | return kTRUE; | |
729 | } | |
716ccba7 | 730 | |
3e4e3c23 | 731 | //______________________________________________________________________________ |
732 | Bool_t AliITSUTrackerGlo::PropagateSeed(AliExternalTrackParam *seed, Double_t xToGo, Double_t mass, Double_t maxStep, Bool_t matCorr) | |
733 | { | |
734 | // propagate seed to given x applying material correction if requested | |
735 | const Double_t kEpsilon = 1e-5; | |
736 | Double_t xpos = seed->GetX(); | |
737 | Int_t dir = (xpos<xToGo) ? 1:-1; | |
738 | Double_t xyz0[3],xyz1[3],param[7]; | |
739 | // | |
740 | Bool_t updTime = dir>0 && seed->IsStartedTimeIntegral(); | |
741 | if (matCorr || updTime) seed->GetXYZ(xyz1); //starting global position | |
742 | while ( (xToGo-xpos)*dir > kEpsilon){ | |
743 | Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos), maxStep); | |
744 | Double_t x = xpos+step; | |
745 | Double_t bz=GetBz(); // getting the local Bz | |
746 | if (!seed->PropagateTo(x,bz)) return kFALSE; | |
747 | double ds = 0; | |
748 | if (matCorr || updTime) { | |
749 | xyz0[0]=xyz1[0]; // global pos at the beginning of step | |
750 | xyz0[1]=xyz1[1]; | |
751 | xyz0[2]=xyz1[2]; | |
752 | seed->GetXYZ(xyz1); // // global pos at the end of step | |
753 | // | |
754 | if (matCorr) { | |
755 | MeanMaterialBudget(xyz0,xyz1,param); | |
756 | Double_t xrho=param[0]*param[4], xx0=param[1]; | |
757 | if (dir>0) xrho = -xrho; // outward should be negative | |
758 | if (!seed->CorrectForMeanMaterial(xx0,xrho,mass)) return kFALSE; | |
759 | ds = param[4]; | |
760 | } | |
761 | else { // matCorr is not requested but time integral is | |
762 | double d0 = xyz1[0]-xyz0[0]; | |
763 | double d1 = xyz1[1]-xyz0[1]; | |
764 | double d2 = xyz1[2]-xyz0[2]; | |
765 | ds = TMath::Sqrt(d0*d0+d1*d1+d2*d2); | |
766 | } | |
767 | } | |
768 | if (updTime) seed->AddTimeStep(ds); | |
769 | // | |
770 | xpos = seed->GetX(); | |
771 | } | |
772 | return kTRUE; | |
773 | } | |
774 | ||
716ccba7 | 775 | //______________________________________________________________________________ |
776 | void AliITSUTrackerGlo::SaveCurrentTrackHypotheses() | |
777 | { | |
778 | // RS: shall we clean up killed seeds? | |
779 | fCurrHyp = 0; | |
780 | // TODO | |
781 | ||
782 | } | |
3e4e3c23 | 783 | |
784 | //______________________________________________________________________________ | |
785 | void AliITSUTrackerGlo::FinalizeHypotheses() | |
786 | { | |
787 | // select winner for each hypothesis, remove cl. sharing conflicts | |
788 | AliInfo("TODO"); | |
789 | // | |
790 | int nh = fHypStore.GetEntriesFast(); | |
791 | for (int ih=0;ih<nh;ih++) { | |
792 | AliITSUTrackHyp* hyp = (AliITSUTrackHyp*) fHypStore.UncheckedAt(ih); | |
793 | if (!hyp) continue; | |
c51c3124 | 794 | hyp->DefineWinner(); // TODO |
795 | UpdateESDTrack(hyp); | |
3e4e3c23 | 796 | } |
797 | ||
798 | } | |
c51c3124 | 799 | |
800 | //______________________________________________________________________________ | |
801 | void AliITSUTrackerGlo::UpdateESDTrack(AliITSUTrackHyp* hyp) | |
802 | { | |
803 | // update ESD track with current best hypothesis | |
804 | AliESDtrack* esdTr = hyp->GetESDTrack(); | |
805 | if (!esdTr) return; | |
806 | AliITSUSeed* win = hyp->GetWinner(); | |
807 | if (!win) return; | |
808 | esdTr->UpdateTrackParams(hyp,AliESDtrack::kITSin); | |
809 | // | |
810 | // transfer module indices | |
811 | // TODO | |
812 | } | |
813 | ||
814 | //______________________________________________________________________________ | |
815 | Bool_t AliITSUTrackerGlo::RefitTrack(AliITSUTrackHyp* trc, Double_t rDest) | |
816 | { | |
817 | // refit track till radius rDest | |
8b16dbae | 818 | AliITSUTrackHyp tmpTr; |
819 | // | |
c51c3124 | 820 | double rCurr = Sqrt(trc->GetX()*trc->GetX() + trc->GetY()*trc->GetY()); |
821 | int dir,lrStart,lrStop; | |
822 | // | |
8b16dbae | 823 | dir = rCurr<rDest ? 1 : -1; |
824 | lrStart = fITS->FindFirstLayerID(rCurr,dir); | |
825 | lrStop = fITS->FindLastLayerID(rDest,dir); | |
e2d2481c | 826 | printf("Refit %d: Lr:%d (%f) -> Lr:%d (%f)\n",dir,lrStart,rCurr, lrStop,rDest); |
827 | printf("Before refit: "); trc->AliExternalTrackParam::Print(); | |
8b16dbae | 828 | if (lrStop<0 || lrStart<0) AliFatal(Form("Failed to find start(%d) or last(%d) layers. Track from %.3f to %.3f",lrStart,lrStop,rCurr,rDest)); |
829 | // | |
830 | trc->FetchClusterInfo(fClInfo); | |
831 | fCurrMass = trc->GetMass(); | |
832 | tmpTr.AliKalmanTrack::operator=(*trc); | |
833 | tmpTr.SetChi2(0); | |
834 | int iclLr[2],nclLr; | |
c51c3124 | 835 | // |
836 | for (int ilr=lrStart;ilr!=lrStop;ilr+=dir) { | |
837 | AliITSURecoLayer* lr = fITS->GetLayer(ilr); | |
838 | if ( dir*(rCurr-lr->GetR(dir))>0) continue; // this layer is already passed | |
8b16dbae | 839 | int ilrA2,ilrA = lr->GetActiveID(); |
840 | // passive layer or active w/o hits will be traversed on the way to next cluster | |
841 | if (!lr->IsActive() || fClInfo[ilrA2=(ilrA<<1)]<0) continue; | |
842 | // | |
e2d2481c | 843 | if (ilr!=lrStart && !TransportToLayer(&tmpTr,lrStart,ilr)) { |
844 | printf("Failed to transport %d -> %d\n",lrStart,ilr); | |
845 | return kFALSE; // go to the entrance to the layer | |
846 | } | |
8b16dbae | 847 | lrStart = ilr; |
848 | // | |
849 | // select the order in which possible 2 clusters (in case of the overlap) will be traversed and fitted | |
850 | nclLr=0; | |
851 | if (dir>0) { // clusters are stored in increasing radius order | |
852 | iclLr[nclLr++]=fClInfo[ilrA2++]; | |
853 | if (fClInfo[ilrA2]>=0) iclLr[nclLr++]=fClInfo[ilrA2]; | |
854 | } | |
855 | else { | |
856 | if ( fClInfo[ilrA2+1]>=0 ) iclLr[nclLr++]=fClInfo[ilrA2+1]; | |
857 | iclLr[nclLr++]=fClInfo[ilrA2]; | |
858 | } | |
859 | // | |
860 | for (int icl=0;icl<nclLr;icl++) { | |
861 | AliITSUClusterPix* clus = (AliITSUClusterPix*)lr->GetCluster(iclLr[icl]); | |
862 | AliITSURecoSens* sens = lr->GetSensorFromID(clus->GetVolumeId()); | |
863 | if (!tmpTr.Rotate(sens->GetPhiTF())) return kFALSE; | |
e2d2481c | 864 | printf("Refit cl:%d on lr %d Need to go %.4f -> %.4f\n",icl,ilrA,tmpTr.GetX(),sens->GetXTF()+clus->GetX()); |
8b16dbae | 865 | if (!PropagateSeed(&tmpTr,sens->GetXTF()+clus->GetX(),fCurrMass)) return kFALSE; |
866 | if (!tmpTr.Update(clus)) return kFALSE; | |
e2d2481c | 867 | printf("AfterRefit: "); tmpTr.AliExternalTrackParam::Print(); |
8b16dbae | 868 | } |
c51c3124 | 869 | // |
870 | } | |
8b16dbae | 871 | // All clusters were succesfully fitted. Even if the track does not reach rDest, this is enough to validate it. |
872 | // Still, try to go as close as possible to rDest. | |
873 | // | |
874 | if (lrStart!=lrStop) { | |
e2d2481c | 875 | printf("Going to last layer %d -> %d\n",lrStart,lrStop); |
876 | if (!TransportToLayer(&tmpTr,lrStart,lrStop)) return kTRUE; | |
877 | if (!GoToExitFromLayer(&tmpTr,fITS->GetLayer(lrStop),dir)) return kFALSE; // go till the exit from layer | |
878 | // | |
879 | printf("On exit from last layer\n"); | |
880 | tmpTr.AliExternalTrackParam::Print(); | |
881 | // go to the destination radius | |
882 | if (!tmpTr.GetXatLabR(rDest,rDest,GetBz(),dir)) return kTRUE; | |
883 | if (!PropagateSeed(&tmpTr,rDest,fCurrMass, 100, kFALSE)) return kTRUE; | |
8b16dbae | 884 | } |
885 | trc->AliKalmanTrack::operator=(tmpTr); | |
e2d2481c | 886 | printf("After refit (now at lr %d): ",lrStart); trc->AliExternalTrackParam::Print(); |
8b16dbae | 887 | return kTRUE; |
c51c3124 | 888 | } |
dd2117a2 | 889 | |
890 | //__________________________________________________________________ | |
891 | void AliITSUTrackerGlo::CookMCLabel(AliITSUTrackHyp* hyp) | |
892 | { | |
893 | // build MC label | |
894 | // | |
895 | const int kMaxLbPerCl = 3; | |
896 | int lbID[kMaxLayers*6],lbStat[kMaxLayers*6]; | |
897 | Int_t lr,nLab=0,nCl=0; | |
898 | AliITSUSeed *seed = hyp->GetWinner(); | |
899 | while(seed) { | |
900 | int clID = seed->GetLrCluster(lr); | |
901 | if (clID>=0) { | |
902 | AliCluster *cl = fITS->GetLayerActive(lr)->GetCluster(clID); | |
903 | nCl++; | |
904 | for (int imc=0;imc<kMaxLbPerCl;imc++) { // labels within single cluster | |
905 | int trLb = cl->GetLabel(imc); | |
906 | if (imc<0) break; | |
907 | // search this mc track in already accounted ones | |
908 | int iLab; | |
909 | for (iLab=0;iLab<nLab;iLab++) if (lbID[iLab]==trLb) break; | |
910 | if (iLab<nLab) lbStat[iLab]++; | |
911 | else { | |
912 | lbID[nLab] = trLb; | |
913 | lbStat[nLab++] = 1; | |
914 | } | |
915 | } // loop over given cluster's labels | |
916 | } | |
917 | seed = (AliITSUSeed*)seed->GetParent(); | |
918 | } // loop over clusters | |
919 | // | |
920 | if (nCl) { | |
921 | int maxLab=0,nTPCok=0; | |
922 | AliESDtrack* esdTr = hyp->GetESDTrack(); | |
923 | int tpcLab = esdTr ? Abs(esdTr->GetTPCLabel()) : -kDummyLabel; | |
924 | for (int ilb=nLab;ilb--;) { | |
925 | int st = lbStat[ilb]; | |
926 | if (lbStat[maxLab]<st) maxLab=ilb; | |
927 | if (tpcLab==lbID[ilb]) nTPCok += st; | |
928 | } | |
929 | hyp->SetFakeRatio(1.-float(nTPCok)/nCl); | |
930 | hyp->SetLabel( nTPCok==nCl ? tpcLab : -tpcLab); | |
931 | hyp->SetITSLabel( lbStat[maxLab]==nCl ? lbStat[maxLab] : -lbStat[maxLab]); // winner label | |
932 | return; | |
933 | } | |
934 | // | |
935 | hyp->SetFakeRatio(-1.); | |
936 | hyp->SetLabel( kDummyLabel ); | |
937 | hyp->SetITSLabel( kDummyLabel ); | |
938 | } |