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006b5f7f | 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 | // Implementation of the ITS tracker class | |
18 | // | |
19 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
a9a2d814 | 20 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch |
006b5f7f | 21 | //------------------------------------------------------------------------- |
1f9a65c4 | 22 | |
006b5f7f | 23 | #include <TFile.h> |
24 | #include <TTree.h> | |
25 | #include <TRandom.h> | |
006b5f7f | 26 | |
27 | #include "AliITSgeom.h" | |
28 | #include "AliITSRecPoint.h" | |
517b130f | 29 | #include "AliTPCtrack.h" |
c630aafd | 30 | #include "AliESD.h" |
006b5f7f | 31 | #include "AliITSclusterV2.h" |
32 | #include "AliITStrackerV2.h" | |
33 | ||
8676d691 | 34 | ClassImp(AliITStrackerV2) |
006b5f7f | 35 | |
006b5f7f | 36 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers |
37 | ||
c630aafd | 38 | AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() { |
006b5f7f | 39 | //-------------------------------------------------------------------- |
61ab8ea8 | 40 | //This is the AliITStrackerV2 constructor |
006b5f7f | 41 | //-------------------------------------------------------------------- |
006b5f7f | 42 | AliITSgeom *g=(AliITSgeom*)geom; |
43 | ||
44 | Float_t x,y,z; | |
45 | Int_t i; | |
c630aafd | 46 | for (i=1; i<kMaxLayer+1; i++) { |
006b5f7f | 47 | Int_t nlad=g->GetNladders(i); |
48 | Int_t ndet=g->GetNdetectors(i); | |
49 | ||
50 | g->GetTrans(i,1,1,x,y,z); | |
51 | Double_t r=TMath::Sqrt(x*x + y*y); | |
52 | Double_t poff=TMath::ATan2(y,x); | |
53 | Double_t zoff=z; | |
54 | ||
55 | g->GetTrans(i,1,2,x,y,z); | |
56 | r += TMath::Sqrt(x*x + y*y); | |
57 | g->GetTrans(i,2,1,x,y,z); | |
58 | r += TMath::Sqrt(x*x + y*y); | |
59 | g->GetTrans(i,2,2,x,y,z); | |
60 | r += TMath::Sqrt(x*x + y*y); | |
61 | r*=0.25; | |
62 | ||
63 | new (fLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); | |
64 | ||
65 | for (Int_t j=1; j<nlad+1; j++) { | |
66 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
67 | Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift); | |
68 | Double_t rot[9]; g->GetRotMatrix(i,j,k,rot); | |
69 | ||
70 | Double_t r =-x*rot[1] + y*rot[0]; if (i==1) r=-r; | |
71 | Double_t phi=TMath::ATan2(rot[1],rot[0]); if (i==1) phi-=3.1415927; | |
61ab8ea8 | 72 | phi+=0.5*TMath::Pi(); if (phi<0) phi += 2*TMath::Pi(); |
006b5f7f | 73 | AliITSdetector &det=fLayers[i-1].GetDetector((j-1)*ndet + k-1); |
74 | ||
006b5f7f | 75 | new(&det) AliITSdetector(r,phi); |
76 | } | |
77 | } | |
c630aafd | 78 | |
006b5f7f | 79 | } |
80 | ||
61ab8ea8 | 81 | fI=kMaxLayer; |
743a19f2 | 82 | |
61ab8ea8 | 83 | fPass=0; |
84 | fConstraint[0]=1; fConstraint[1]=0; | |
8676d691 | 85 | |
86 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
87 | SetVertex(xyz,ers); | |
c0dd5278 | 88 | |
89 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
90 | fLastLayerToTrackTo=kLastLayerToTrackTo; | |
91 | ||
92 | } | |
93 | ||
94 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
95 | //-------------------------------------------------------------------- | |
96 | //This function set masks of the layers which must be not skipped | |
97 | //-------------------------------------------------------------------- | |
98 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i]; | |
61ab8ea8 | 99 | } |
006b5f7f | 100 | |
c630aafd | 101 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 102 | //-------------------------------------------------------------------- |
103 | //This function loads ITS clusters | |
104 | //-------------------------------------------------------------------- | |
61ab8ea8 | 105 | TBranch *branch=cTree->GetBranch("Clusters"); |
106 | if (!branch) { | |
c630aafd | 107 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 108 | return 1; |
61ab8ea8 | 109 | } |
006b5f7f | 110 | |
61ab8ea8 | 111 | TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy; |
112 | branch->SetAddress(&clusters); | |
006b5f7f | 113 | |
61ab8ea8 | 114 | Int_t j=0; |
115 | for (Int_t i=0; i<kMaxLayer; i++) { | |
b87bd7cd | 116 | Int_t ndet=fLayers[i].GetNdetectors(); |
117 | Int_t jmax = j + fLayers[i].GetNladders()*ndet; | |
61ab8ea8 | 118 | for (; j<jmax; j++) { |
119 | if (!cTree->GetEvent(j)) continue; | |
120 | Int_t ncl=clusters->GetEntriesFast(); | |
121 | while (ncl--) { | |
122 | AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl); | |
61ab8ea8 | 123 | fLayers[i].InsertCluster(new AliITSclusterV2(*c)); |
124 | } | |
125 | clusters->Delete(); | |
126 | } | |
b87bd7cd | 127 | fLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 128 | } |
c630aafd | 129 | |
8676d691 | 130 | return 0; |
61ab8ea8 | 131 | } |
006b5f7f | 132 | |
61ab8ea8 | 133 | void AliITStrackerV2::UnloadClusters() { |
134 | //-------------------------------------------------------------------- | |
135 | //This function unloads ITS clusters | |
136 | //-------------------------------------------------------------------- | |
137 | for (Int_t i=0; i<kMaxLayer; i++) fLayers[i].ResetClusters(); | |
006b5f7f | 138 | } |
139 | ||
880f41b9 | 140 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
141 | //-------------------------------------------------------------------- | |
142 | // Correction for the material between the TPC and the ITS | |
143 | // (should it belong to the TPC code ?) | |
144 | //-------------------------------------------------------------------- | |
145 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
146 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
147 | Double_t yr=12.8, dr=0.03; // rods ? | |
148 | Double_t zm=0.2, dm=0.40; // membrane | |
149 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
150 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
151 | ||
152 | if (t->GetX() > riw) { | |
153 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
154 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
155 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
156 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
157 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
158 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
159 | if (!t->PropagateTo(rs,ds)) return 1; | |
160 | } else if (t->GetX() < rs) { | |
161 | if (!t->PropagateTo(rs,-ds)) return 1; | |
162 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
163 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
164 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
165 | if (!t->PropagateTo(riw,-diw,x0iw)) return 1; | |
166 | } else { | |
167 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
168 | return 1; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
c630aafd | 174 | Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) { |
006b5f7f | 175 | //-------------------------------------------------------------------- |
c630aafd | 176 | // This functions reconstructs ITS tracks |
177 | // The clusters must be already loaded ! | |
006b5f7f | 178 | //-------------------------------------------------------------------- |
c630aafd | 179 | TObjArray itsTracks(15000); |
006b5f7f | 180 | |
c630aafd | 181 | {/* Read ESD tracks */ |
182 | Int_t nentr=event->GetNumberOfTracks(); | |
183 | Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr); | |
184 | while (nentr--) { | |
185 | AliESDtrack *esd=event->GetTrack(nentr); | |
186 | ||
187 | if (esd->GetStatus() != AliESDtrack::kTPCin) continue; | |
188 | ||
189 | AliITStrackV2 *t=0; | |
190 | try { | |
191 | t=new AliITStrackV2(*esd); | |
192 | } catch (const Char_t *msg) { | |
193 | Warning("Clusters2Tracks",msg); | |
194 | delete t; | |
195 | continue; | |
196 | } | |
197 | if (TMath::Abs(t->GetD())>4) continue; | |
006b5f7f | 198 | |
c630aafd | 199 | if (CorrectForDeadZoneMaterial(t)!=0) { |
200 | Warning("Clusters2Tracks", | |
201 | "failed to correct for the material in the dead zone !\n"); | |
202 | delete t; | |
203 | continue; | |
204 | } | |
205 | itsTracks.AddLast(t); | |
206 | } | |
207 | } /* End Read ESD tracks */ | |
208 | ||
209 | itsTracks.Sort(); | |
210 | Int_t nentr=itsTracks.GetEntriesFast(); | |
211 | ||
212 | Int_t ntrk=0; | |
213 | for (fPass=0; fPass<2; fPass++) { | |
214 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
215 | for (Int_t i=0; i<nentr; i++) { | |
216 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
217 | if (t==0) continue; //this track has been already tracked | |
218 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label | |
219 | ||
220 | ResetTrackToFollow(*t); | |
221 | ResetBestTrack(); | |
222 | ||
223 | for (FollowProlongation(); fI<kMaxLayer; fI++) { | |
224 | while (TakeNextProlongation()) FollowProlongation(); | |
225 | } | |
226 | ||
227 | if (fBestTrack.GetNumberOfClusters() == 0) continue; | |
228 | ||
229 | if (fConstraint[fPass]) { | |
230 | ResetTrackToFollow(*t); | |
231 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
232 | ResetBestTrack(); | |
233 | } | |
234 | ||
235 | fBestTrack.SetLabel(tpcLabel); | |
236 | fBestTrack.CookdEdx(); | |
237 | CookLabel(&fBestTrack,0.); //For comparison only | |
238 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
239 | UseClusters(&fBestTrack); | |
240 | delete itsTracks.RemoveAt(i); | |
241 | ntrk++; | |
242 | } | |
243 | } | |
244 | ||
245 | itsTracks.Delete(); | |
246 | ||
247 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | Int_t AliITStrackerV2::Clusters2Tracks(TTree *tpcTree, TTree *itsTree) { | |
253 | //-------------------------------------------------------------------- | |
254 | // This functions reconstructs ITS tracks | |
255 | // The clusters must be already loaded ! | |
256 | //-------------------------------------------------------------------- | |
a7554aa9 | 257 | Int_t nentr=0; TObjArray itsTracks(15000); |
7f6ddf58 | 258 | |
259 | {/* Read TPC tracks */ | |
7f6ddf58 | 260 | AliTPCtrack *itrack=new AliTPCtrack; |
c630aafd | 261 | TBranch *branch=tpcTree->GetBranch("tracks"); |
262 | if (!branch) { | |
263 | Error("Clusters2Tracks","Can't get the branch !"); | |
264 | return 1; | |
265 | } | |
7f6ddf58 | 266 | tpcTree->SetBranchAddress("tracks",&itrack); |
267 | nentr=(Int_t)tpcTree->GetEntries(); | |
c630aafd | 268 | |
880f41b9 | 269 | Info("Clusters2Tracks","Number of TPC tracks: %d\n",nentr); |
270 | ||
7f6ddf58 | 271 | for (Int_t i=0; i<nentr; i++) { |
272 | tpcTree->GetEvent(i); | |
4ab260d6 | 273 | AliITStrackV2 *t=0; |
274 | try { | |
275 | t=new AliITStrackV2(*itrack); | |
276 | } catch (const Char_t *msg) { | |
8676d691 | 277 | Warning("Clusters2Tracks",msg); |
4ab260d6 | 278 | delete t; |
279 | continue; | |
280 | } | |
a9a2d814 | 281 | if (TMath::Abs(t->GetD())>4) continue; |
282 | ||
880f41b9 | 283 | if (CorrectForDeadZoneMaterial(t)!=0) { |
284 | Warning("Clusters2Tracks", | |
285 | "failed to correct for the material in the dead zone !\n"); | |
286 | continue; | |
287 | } | |
a9a2d814 | 288 | |
289 | itsTracks.AddLast(t); | |
7f6ddf58 | 290 | } |
7f6ddf58 | 291 | delete itrack; |
006b5f7f | 292 | } |
7f6ddf58 | 293 | itsTracks.Sort(); |
880f41b9 | 294 | nentr=itsTracks.GetEntriesFast(); |
006b5f7f | 295 | |
7f6ddf58 | 296 | |
006b5f7f | 297 | AliITStrackV2 *otrack=&fBestTrack; |
c630aafd | 298 | TBranch *branch=itsTree->GetBranch("tracks"); |
299 | if (!branch) itsTree->Branch("tracks","AliITStrackV2",&otrack,32000,3); | |
300 | else branch->SetAddress(&otrack); | |
006b5f7f | 301 | |
7f6ddf58 | 302 | for (fPass=0; fPass<2; fPass++) { |
303 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
304 | for (Int_t i=0; i<nentr; i++) { | |
7f6ddf58 | 305 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); |
306 | if (t==0) continue; //this track has been already tracked | |
307 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label | |
a9a2d814 | 308 | |
4ab260d6 | 309 | ResetTrackToFollow(*t); |
7f6ddf58 | 310 | ResetBestTrack(); |
006b5f7f | 311 | |
c630aafd | 312 | for (FollowProlongation(); fI<kMaxLayer; fI++) { |
313 | while (TakeNextProlongation()) FollowProlongation(); | |
314 | } | |
006b5f7f | 315 | |
c0dd5278 | 316 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
8676d691 | 317 | |
318 | if (fConstraint[fPass]) { | |
c630aafd | 319 | ResetTrackToFollow(*t); |
320 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
321 | ResetBestTrack(); | |
8676d691 | 322 | } |
4ab260d6 | 323 | |
8676d691 | 324 | fBestTrack.SetLabel(tpcLabel); |
325 | fBestTrack.CookdEdx(); | |
326 | CookLabel(&fBestTrack,0.); //For comparison only | |
c630aafd | 327 | itsTree->Fill(); |
8676d691 | 328 | UseClusters(&fBestTrack); |
329 | delete itsTracks.RemoveAt(i); | |
7f6ddf58 | 330 | } |
006b5f7f | 331 | } |
006b5f7f | 332 | |
c630aafd | 333 | nentr=(Int_t)itsTree->GetEntries(); |
880f41b9 | 334 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr); |
8676d691 | 335 | |
7f6ddf58 | 336 | itsTracks.Delete(); |
61ab8ea8 | 337 | |
c630aafd | 338 | return 0; |
339 | } | |
340 | ||
341 | Int_t AliITStrackerV2::PropagateBack(AliESD *event) { | |
342 | //-------------------------------------------------------------------- | |
343 | // This functions propagates reconstructed ITS tracks back | |
344 | // The clusters must be loaded ! | |
345 | //-------------------------------------------------------------------- | |
346 | Int_t nentr=event->GetNumberOfTracks(); | |
347 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
348 | ||
349 | Int_t ntrk=0; | |
350 | for (Int_t i=0; i<nentr; i++) { | |
351 | AliESDtrack *esd=event->GetTrack(i); | |
352 | ||
353 | if (esd->GetStatus()!=(AliESDtrack::kTPCin|AliESDtrack::kITSin)) continue; | |
354 | ||
355 | AliITStrackV2 *t=0; | |
356 | try { | |
357 | t=new AliITStrackV2(*esd); | |
358 | } catch (const Char_t *msg) { | |
359 | Warning("PropagateBack",msg); | |
360 | delete t; | |
361 | continue; | |
362 | } | |
363 | ||
364 | ResetTrackToFollow(*t); | |
365 | ||
366 | // propagete to vertex [SR, GSI 17.02.2003] | |
367 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); | |
368 | fTrackToFollow.PropagateToVertex(); | |
369 | ||
370 | // Start Time measurement [SR, GSI 17.02.2003] | |
371 | fTrackToFollow.StartTimeIntegral(); | |
372 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
373 | ||
374 | fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters(); | |
375 | if (RefitAt(49.,&fTrackToFollow,t)) { | |
376 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
377 | Warning("PropagateBack", | |
378 | "failed to correct for the material in the dead zone !\n"); | |
379 | delete t; | |
380 | continue; | |
381 | } | |
382 | fTrackToFollow.SetLabel(t->GetLabel()); | |
383 | fTrackToFollow.CookdEdx(); | |
384 | CookLabel(&fTrackToFollow,0.); //For comparison only | |
385 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
386 | UseClusters(&fTrackToFollow); | |
387 | ntrk++; | |
388 | } | |
389 | delete t; | |
390 | } | |
391 | ||
392 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 393 | |
83d73500 | 394 | return 0; |
395 | } | |
396 | ||
c630aafd | 397 | Int_t AliITStrackerV2::PropagateBack(TTree *inp, TTree *out) { |
14825d5a | 398 | //-------------------------------------------------------------------- |
399 | //This functions propagates reconstructed ITS tracks back | |
400 | //-------------------------------------------------------------------- | |
c630aafd | 401 | Error("PropagateBack","This method is not converted to NewIO yet\n"); |
402 | return 1; | |
403 | /* | |
404 | TFile *in=(TFile*)inp; | |
405 | TDirectory *savedir=gDirectory; | |
406 | ||
8676d691 | 407 | if (LoadClusters()!=0) return 1; |
61ab8ea8 | 408 | |
c630aafd | 409 | if (!in->IsOpen()) { |
410 | Error("PropagateBack","file with ITS tracks is not open !\n"); | |
8676d691 | 411 | return 1; |
c630aafd | 412 | } |
413 | ||
414 | if (!out->IsOpen()) { | |
415 | Error("PropagateBack","file for back propagated ITS tracks is not open !\n"); | |
416 | return 2; | |
417 | } | |
418 | ||
419 | in->cd(); | |
420 | ||
421 | Char_t tname[100]; | |
422 | sprintf(tname,"TreeT_ITS_%d",GetEventNumber()); | |
423 | TTree *itsTree=(TTree*)in->Get(tname); | |
14825d5a | 424 | if (!itsTree) { |
8676d691 | 425 | Error("PropagateBack","can't get a tree with ITS tracks !\n"); |
426 | return 3; | |
14825d5a | 427 | } |
428 | AliITStrackV2 *itrack=new AliITStrackV2; | |
429 | itsTree->SetBranchAddress("tracks",&itrack); | |
430 | ||
c630aafd | 431 | out->cd(); |
61ab8ea8 | 432 | |
c630aafd | 433 | sprintf(tname,"TreeT_ITSb_%d",GetEventNumber()); |
434 | TTree backTree(tname,"Tree with back propagated ITS tracks"); | |
14825d5a | 435 | AliTPCtrack *otrack=0; |
f29dbb4b | 436 | backTree.Branch("tracks","AliTPCtrack",&otrack,32000,2); |
14825d5a | 437 | |
14825d5a | 438 | Int_t nentr=(Int_t)itsTree->GetEntries(); |
880f41b9 | 439 | Int_t i; |
440 | for (i=0; i<nentr; i++) { | |
14825d5a | 441 | itsTree->GetEvent(i); |
880f41b9 | 442 | Int_t itsLabel=itrack->GetLabel(); //save the ITS track label |
14825d5a | 443 | ResetTrackToFollow(*itrack); |
f29dbb4b | 444 | |
445 | // propagete to vertex [SR, GSI 17.02.2003] | |
446 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); | |
447 | fTrackToFollow.PropagateToVertex(); | |
448 | ||
449 | // Start Time measurement [SR, GSI 17.02.2003] | |
450 | fTrackToFollow.StartTimeIntegral(); | |
451 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
452 | // | |
453 | ||
3a382e5c | 454 | fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters(); |
455 | if (!RefitAt(49.,&fTrackToFollow,itrack)) continue; | |
f29dbb4b | 456 | |
880f41b9 | 457 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { |
458 | Warning("PropagateBack", | |
459 | "failed to correct for the material in the dead zone !\n"); | |
460 | continue; | |
461 | } | |
462 | ||
463 | fTrackToFollow.SetLabel(itsLabel); | |
464 | otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha()); | |
465 | backTree.Fill(); delete otrack; | |
466 | UseClusters(&fTrackToFollow); | |
467 | } | |
468 | i=(Int_t)backTree.GetEntries(); | |
c630aafd | 469 | backTree.Write(); |
14825d5a | 470 | |
880f41b9 | 471 | Info("PropagateBack","Number of ITS tracks: %d\n",nentr); |
472 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",i); | |
f29dbb4b | 473 | |
880f41b9 | 474 | delete itrack; |
c630aafd | 475 | delete itsTree; //Thanks to Mariana Bondila |
476 | ||
880f41b9 | 477 | UnloadClusters(); |
478 | ||
c630aafd | 479 | savedir->cd(); |
480 | ||
880f41b9 | 481 | return 0; |
c630aafd | 482 | */ |
880f41b9 | 483 | } |
484 | ||
c630aafd | 485 | Int_t AliITStrackerV2::RefitInward(AliESD *event) { |
83d73500 | 486 | //-------------------------------------------------------------------- |
487 | // This functions refits ITS tracks using the | |
488 | // "inward propagated" TPC tracks | |
c630aafd | 489 | // The clusters must be loaded ! |
83d73500 | 490 | //-------------------------------------------------------------------- |
c630aafd | 491 | Int_t nentr=event->GetNumberOfTracks(); |
492 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
493 | ||
494 | Int_t ntrk=0; | |
495 | for (Int_t i=0; i<nentr; i++) { | |
496 | AliESDtrack *esd=event->GetTrack(i); | |
497 | ||
498 | ULong_t flags = AliESDtrack::kITSin | AliESDtrack::kTPCrefit; | |
499 | ||
500 | if ( (esd->GetStatus() & flags) != flags ) continue; | |
501 | if ( esd->GetStatus() & AliESDtrack::kITSrefit) continue; | |
502 | ||
503 | AliITStrackV2 *t=0; | |
504 | try { | |
505 | t=new AliITStrackV2(*esd); | |
506 | } catch (const Char_t *msg) { | |
507 | Warning("RefitInward",msg); | |
508 | delete t; | |
509 | continue; | |
510 | } | |
511 | ||
512 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
513 | Warning("RefitInward", | |
514 | "failed to correct for the material in the dead zone !\n"); | |
515 | delete t; | |
516 | continue; | |
517 | } | |
518 | ||
519 | ResetTrackToFollow(*t); | |
520 | fTrackToFollow.ResetClusters(); | |
521 | ||
522 | //Refitting... | |
523 | if (RefitAt(3.7, &fTrackToFollow, t)) { | |
524 | fTrackToFollow.SetLabel(t->GetLabel()); | |
525 | fTrackToFollow.CookdEdx(); | |
526 | CookLabel(&fTrackToFollow,0.); //For comparison only | |
527 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit); | |
528 | UseClusters(&fTrackToFollow); | |
529 | ntrk++; | |
530 | } | |
531 | delete t; | |
532 | } | |
533 | ||
534 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 535 | |
c630aafd | 536 | return 0; |
537 | } | |
83d73500 | 538 | |
c630aafd | 539 | Int_t AliITStrackerV2::RefitInward(TTree *in, TTree *out) { |
540 | //-------------------------------------------------------------------- | |
541 | // This functions refits ITS tracks using the | |
542 | // "inward propagated" TPC tracks | |
543 | //-------------------------------------------------------------------- | |
544 | Error("RefitInward","This method is not converted to NewIO yet\n"); | |
545 | return 1; | |
546 | /* | |
880f41b9 | 547 | TFile *in=(TFile*)inp; |
c630aafd | 548 | TDirectory *savedir=gDirectory; |
14825d5a | 549 | |
880f41b9 | 550 | if (LoadClusters()!=0) return 1; |
551 | ||
c630aafd | 552 | if (!inSeeds->IsOpen()) { |
880f41b9 | 553 | Error("RefitInward","file with inward TPC tracks is not open !\n"); |
554 | return 2; | |
555 | } | |
556 | ||
c630aafd | 557 | if (!in->IsOpen()) { |
558 | Error("RefitInward","file with ITS tracks is not open !\n"); | |
559 | return 2; | |
560 | } | |
561 | ||
880f41b9 | 562 | if (!out->IsOpen()) { |
563 | Error("RefitInward","file for inward ITS tracks is not open !\n"); | |
564 | return 3; | |
565 | } | |
566 | ||
567 | Int_t i; | |
568 | ||
569 | //LUT used for the track matching (S.Radomski's idea) | |
570 | const Int_t nLab = 400000; // limit on the number of track labels | |
571 | Int_t lut[nLab]; | |
572 | for(i=0; i<nLab; i++) lut[i] = -1; | |
573 | ||
574 | Char_t tname[100]; | |
575 | ||
576 | TObjArray itsTracks(15000); | |
c630aafd | 577 | {// Read the ITS tracks |
880f41b9 | 578 | sprintf(tname,"TreeT_ITS_%d",GetEventNumber()); |
c630aafd | 579 | TTree *itsTree=(TTree*)in->Get(tname); |
880f41b9 | 580 | if (!itsTree) { |
581 | Error("RefitInward","can't get a tree with ITS tracks !\n"); | |
582 | return 3; | |
14825d5a | 583 | } |
880f41b9 | 584 | AliITStrackV2 *itrack=new AliITStrackV2; |
585 | itsTree->SetBranchAddress("tracks",&itrack); | |
586 | Int_t nits=(Int_t)itsTree->GetEntries(); | |
587 | ||
588 | Info("RefitInward","Number of ITS tracks: %d\n",nits); | |
589 | ||
590 | for (Int_t i=0; i<nits; i++) { | |
591 | itsTree->GetEvent(i); | |
592 | Int_t lab=TMath::Abs(itrack->GetLabel()); | |
593 | if (lab < nLab) { | |
594 | if (lut[lab]>=0) Warning("RefitInward","double track %d\n",lab); | |
595 | lut[lab]=i; | |
596 | } else { | |
597 | Warning("RefitInward","Too big ITS track label: %d\n!",lab); | |
598 | continue; | |
599 | } | |
600 | itsTracks.AddLast(new AliITStrackV2(*itrack)); | |
14825d5a | 601 | } |
880f41b9 | 602 | delete itsTree; |
603 | delete itrack; | |
14825d5a | 604 | } |
605 | ||
c630aafd | 606 | //Get the input seeds tree |
607 | inSeeds->cd(); | |
880f41b9 | 608 | sprintf(tname,"tracksTPC_%d",GetEventNumber()); |
c630aafd | 609 | TTree *tpcTree=(TTree*)inSeeds->Get(tname); |
880f41b9 | 610 | if (!tpcTree) { |
611 | Error("RefitInward","can't get a tree with TPC tracks !\n"); | |
612 | return 3; | |
613 | } | |
614 | AliTPCtrack *itrack=new AliTPCtrack; | |
615 | tpcTree->SetBranchAddress("tracks",&itrack); | |
616 | Int_t ntpc=(Int_t)tpcTree->GetEntries(); | |
61ab8ea8 | 617 | |
880f41b9 | 618 | Info("RefitInward","Number of TPC tracks: %d\n",ntpc); |
14825d5a | 619 | |
c630aafd | 620 | //Create the output tree |
621 | out->cd(); | |
622 | sprintf(tname,"TreeT_ITSinward_%d",GetEventNumber()); | |
623 | TTree outTree(tname,"Tree with inward refitted ITS tracks"); | |
624 | AliITStrackV2 *otrack=0; | |
625 | outTree.Branch("tracks","AliITStrackV2",&otrack,32000,0); | |
626 | ||
880f41b9 | 627 | for (i=0; i<ntpc; i++) { |
628 | tpcTree->GetEvent(i); | |
880f41b9 | 629 | try { |
c630aafd | 630 | otrack=new AliITStrackV2(*itrack); |
880f41b9 | 631 | } catch (const Char_t *msg) { |
632 | Warning("RefitInward",msg); | |
c630aafd | 633 | delete otrack; |
880f41b9 | 634 | continue; |
635 | } | |
636 | //check if this track was reconstructed in the ITS | |
c630aafd | 637 | Int_t lab=TMath::Abs(otrack->GetLabel()); |
880f41b9 | 638 | if (lab >= nLab) { |
639 | Warning("RefitInward","Too big TPC track label: %d\n!",lab); | |
640 | continue; | |
641 | } | |
642 | Int_t idx=lut[lab]; | |
643 | if (idx<0) continue; //no prolongation in the ITS for this track | |
644 | ||
c630aafd | 645 | if (CorrectForDeadZoneMaterial(otrack)!=0) { |
880f41b9 | 646 | Warning("RefitInward", |
647 | "failed to correct for the material in the dead zone !\n"); | |
648 | continue; | |
649 | } | |
14825d5a | 650 | |
880f41b9 | 651 | //Refitting... |
c630aafd | 652 | { |
653 | AliITStrackV2 *ctrack=(AliITStrackV2*)itsTracks.UncheckedAt(idx); | |
654 | if (!RefitAt(3.7, otrack, ctrack)) continue; | |
655 | } | |
880f41b9 | 656 | otrack->SetLabel(itrack->GetLabel()); //For comparison only |
657 | otrack->CookdEdx(); | |
658 | CookLabel(otrack,0.); //For comparison only | |
659 | outTree.Fill(); | |
c630aafd | 660 | delete otrack; |
880f41b9 | 661 | } |
662 | i=(Int_t)outTree.GetEntries(); | |
663 | Info("RefitInward","Number of inward refitted ITS tracks: %d\n",i); | |
664 | outTree.Write(); | |
c7ee21ca | 665 | |
880f41b9 | 666 | delete tpcTree; |
667 | delete itrack; | |
c630aafd | 668 | UnloadClusters(); |
88cb7938 | 669 | itsTracks.Delete(); |
61ab8ea8 | 670 | |
c630aafd | 671 | savedir->cd(); |
672 | ||
14825d5a | 673 | return 0; |
c630aafd | 674 | */ |
14825d5a | 675 | } |
006b5f7f | 676 | |
677 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { | |
678 | //-------------------------------------------------------------------- | |
679 | // Return pointer to a given cluster | |
680 | //-------------------------------------------------------------------- | |
681 | Int_t l=(index & 0xf0000000) >> 28; | |
682 | Int_t c=(index & 0x0fffffff) >> 00; | |
683 | return fLayers[l].GetCluster(c); | |
684 | } | |
685 | ||
686 | ||
687 | void AliITStrackerV2::FollowProlongation() { | |
688 | //-------------------------------------------------------------------- | |
689 | //This function finds a track prolongation | |
690 | //-------------------------------------------------------------------- | |
c0dd5278 | 691 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 692 | Int_t i=fI-1; |
8676d691 | 693 | |
a9a2d814 | 694 | AliITSlayer &layer=fLayers[i]; |
695 | AliITStrackV2 &track=fTracks[i]; | |
006b5f7f | 696 | |
14825d5a | 697 | Double_t r=layer.GetR(); |
61ab8ea8 | 698 | |
a9a2d814 | 699 | if (i==3 || i==1) { |
700 | Double_t rs=0.5*(fLayers[i+1].GetR() + r); | |
61ab8ea8 | 701 | Double_t d=0.0034, x0=38.6; |
702 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
703 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 704 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 705 | return; |
a9a2d814 | 706 | } |
006b5f7f | 707 | } |
708 | ||
709 | //find intersection | |
710 | Double_t x,y,z; | |
14825d5a | 711 | if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) { |
8676d691 | 712 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 713 | return; |
006b5f7f | 714 | } |
715 | Double_t phi=TMath::ATan2(y,x); | |
006b5f7f | 716 | Int_t idet=layer.FindDetectorIndex(phi,z); |
717 | if (idet<0) { | |
8676d691 | 718 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 719 | return; |
006b5f7f | 720 | } |
721 | ||
722 | //propagate to the intersection | |
723 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 724 | phi=det.GetPhi(); |
a9a2d814 | 725 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 726 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 727 | return; |
006b5f7f | 728 | } |
729 | fTrackToFollow.SetDetectorIndex(idet); | |
730 | ||
731 | //Select possible prolongations and store the current track estimation | |
732 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
8676d691 | 733 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); |
734 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); | |
735 | Double_t road=layer.GetRoad(); | |
736 | if (dz*dy>road*road) { | |
737 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
738 | dz=road*scz; dy=road*scy; | |
739 | } | |
b87bd7cd | 740 | |
741 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); | |
14825d5a | 742 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
7f6ddf58 | 743 | if (dz > kMaxRoad) { |
8676d691 | 744 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 745 | return; |
006b5f7f | 746 | } |
a9a2d814 | 747 | |
c0dd5278 | 748 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 749 | |
b87bd7cd | 750 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); |
14825d5a | 751 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
7f6ddf58 | 752 | if (dy > kMaxRoad) { |
8676d691 | 753 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 754 | return; |
006b5f7f | 755 | } |
a9a2d814 | 756 | |
7f6ddf58 | 757 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 758 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 759 | Double_t ymin=track.GetY() + r*phi - dy; |
760 | Double_t ymax=track.GetY() + r*phi + dy; | |
a9a2d814 | 761 | layer.SelectClusters(zmin,zmax,ymin,ymax); |
762 | fI--; | |
006b5f7f | 763 | |
006b5f7f | 764 | //take another prolongation |
c0dd5278 | 765 | if (!TakeNextProlongation()) |
766 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 767 | |
768 | } | |
769 | ||
770 | //deal with the best track | |
771 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
772 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
773 | if (ncl) | |
774 | if (ncl >= nclb) { | |
775 | Double_t chi2=fTrackToFollow.GetChi2(); | |
776 | if (chi2/ncl < kChi2PerCluster) { | |
777 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { | |
778 | ResetBestTrack(); | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
006b5f7f | 783 | } |
784 | ||
006b5f7f | 785 | Int_t AliITStrackerV2::TakeNextProlongation() { |
786 | //-------------------------------------------------------------------- | |
a9a2d814 | 787 | // This function takes another track prolongation |
788 | // | |
789 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 790 | //-------------------------------------------------------------------- |
006b5f7f | 791 | AliITSlayer &layer=fLayers[fI]; |
4ab260d6 | 792 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 793 | |
b87bd7cd | 794 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]); |
795 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]); | |
8676d691 | 796 | Double_t road=layer.GetRoad(); |
797 | if (dz*dy>road*road) { | |
798 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
799 | dz=road*scz; dy=road*scy; | |
800 | } | |
006b5f7f | 801 | |
802 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
803 | Double_t chi2=12345.; | |
804 | while ((c=layer.GetNextCluster(ci))!=0) { | |
006b5f7f | 805 | Int_t idet=c->GetDetectorIndex(); |
806 | ||
4ab260d6 | 807 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 808 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 809 | ResetTrackToFollow(fTracks[fI]); |
810 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 811 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 812 | continue; |
813 | } | |
4ab260d6 | 814 | fTrackToFollow.SetDetectorIndex(idet); |
815 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 816 | } |
817 | ||
4ab260d6 | 818 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
819 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 820 | |
4ab260d6 | 821 | chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break; |
006b5f7f | 822 | } |
823 | ||
006b5f7f | 824 | if (chi2>=kMaxChi2) return 0; |
825 | if (!c) return 0; | |
826 | ||
006b5f7f | 827 | if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) { |
8676d691 | 828 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 829 | return 0; |
830 | } | |
23efe5f1 | 831 | |
4ab260d6 | 832 | if (fTrackToFollow.GetNumberOfClusters()>1) |
833 | if (TMath::Abs(fTrackToFollow.GetD())>4) return 0; | |
834 | ||
a9a2d814 | 835 | fTrackToFollow. |
836 | SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. | |
837 | ||
838 | { | |
880f41b9 | 839 | Double_t x0; |
61ab8ea8 | 840 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 841 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 842 | } |
4ab260d6 | 843 | |
a9a2d814 | 844 | if (fConstraint[fPass]) { |
4ab260d6 | 845 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 846 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
847 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
848 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 849 | } |
006b5f7f | 850 | |
006b5f7f | 851 | return 1; |
852 | } | |
853 | ||
854 | ||
006b5f7f | 855 | AliITStrackerV2::AliITSlayer::AliITSlayer() { |
856 | //-------------------------------------------------------------------- | |
857 | //default AliITSlayer constructor | |
858 | //-------------------------------------------------------------------- | |
859 | fN=0; | |
860 | fDetectors=0; | |
861 | } | |
862 | ||
863 | AliITStrackerV2::AliITSlayer:: | |
864 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) { | |
865 | //-------------------------------------------------------------------- | |
866 | //main AliITSlayer constructor | |
867 | //-------------------------------------------------------------------- | |
868 | fR=r; fPhiOffset=p; fZOffset=z; | |
869 | fNladders=nl; fNdetectors=nd; | |
870 | fDetectors=new AliITSdetector[fNladders*fNdetectors]; | |
871 | ||
872 | fN=0; | |
873 | fI=0; | |
b87bd7cd | 874 | |
875 | fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster | |
006b5f7f | 876 | } |
877 | ||
878 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
879 | //-------------------------------------------------------------------- | |
880 | // AliITSlayer destructor | |
881 | //-------------------------------------------------------------------- | |
882 | delete[] fDetectors; | |
883 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
884 | } | |
885 | ||
61ab8ea8 | 886 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
887 | //-------------------------------------------------------------------- | |
888 | // This function removes loaded clusters | |
889 | //-------------------------------------------------------------------- | |
890 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
891 | fN=0; | |
892 | fI=0; | |
893 | } | |
894 | ||
b87bd7cd | 895 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
896 | //-------------------------------------------------------------------- | |
897 | // This function calculates the road defined by the cluster density | |
898 | //-------------------------------------------------------------------- | |
899 | Int_t n=0; | |
900 | for (Int_t i=0; i<fN; i++) { | |
901 | if (TMath::Abs(fClusters[i]->GetZ())<fR) n++; | |
902 | } | |
903 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
904 | } | |
905 | ||
006b5f7f | 906 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSclusterV2 *c) { |
907 | //-------------------------------------------------------------------- | |
908 | //This function adds a cluster to this layer | |
909 | //-------------------------------------------------------------------- | |
910 | if (fN==kMaxClusterPerLayer) { | |
8676d691 | 911 | ::Error("InsertCluster","Too many clusters !\n"); |
912 | return 1; | |
006b5f7f | 913 | } |
914 | ||
915 | if (fN==0) {fClusters[fN++]=c; return 0;} | |
916 | Int_t i=FindClusterIndex(c->GetZ()); | |
917 | memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*)); | |
918 | fClusters[i]=c; fN++; | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | Int_t AliITStrackerV2::AliITSlayer::FindClusterIndex(Double_t z) const { | |
924 | //-------------------------------------------------------------------- | |
925 | // This function returns the index of the nearest cluster | |
926 | //-------------------------------------------------------------------- | |
927 | if (fN==0) return 0; | |
928 | if (z <= fClusters[0]->GetZ()) return 0; | |
929 | if (z > fClusters[fN-1]->GetZ()) return fN; | |
930 | Int_t b=0, e=fN-1, m=(b+e)/2; | |
931 | for (; b<e; m=(b+e)/2) { | |
932 | if (z > fClusters[m]->GetZ()) b=m+1; | |
933 | else e=m; | |
934 | } | |
935 | return m; | |
936 | } | |
937 | ||
938 | void AliITStrackerV2::AliITSlayer:: | |
939 | SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) { | |
940 | //-------------------------------------------------------------------- | |
941 | // This function sets the "window" | |
942 | //-------------------------------------------------------------------- | |
943 | fI=FindClusterIndex(zmin); fZmax=zmax; | |
14825d5a | 944 | Double_t circle=2*TMath::Pi()*fR; |
945 | if (ymax>circle) { ymax-=circle; ymin-=circle; } | |
006b5f7f | 946 | fYmin=ymin; fYmax=ymax; |
947 | } | |
948 | ||
949 | const AliITSclusterV2 *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ | |
950 | //-------------------------------------------------------------------- | |
951 | // This function returns clusters within the "window" | |
952 | //-------------------------------------------------------------------- | |
953 | const AliITSclusterV2 *cluster=0; | |
954 | for (Int_t i=fI; i<fN; i++) { | |
955 | const AliITSclusterV2 *c=fClusters[i]; | |
956 | if (c->GetZ() > fZmax) break; | |
957 | if (c->IsUsed()) continue; | |
958 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); | |
959 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
960 | ||
961 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
962 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
963 | ||
964 | if (y<fYmin) continue; | |
965 | if (y>fYmax) continue; | |
966 | cluster=c; ci=i; | |
967 | fI=i+1; | |
968 | break; | |
969 | } | |
7f6ddf58 | 970 | |
006b5f7f | 971 | return cluster; |
972 | } | |
973 | ||
974 | Int_t AliITStrackerV2::AliITSlayer:: | |
975 | FindDetectorIndex(Double_t phi, Double_t z) const { | |
976 | //-------------------------------------------------------------------- | |
977 | //This function finds the detector crossed by the track | |
978 | //-------------------------------------------------------------------- | |
979 | Double_t dphi=phi-fPhiOffset; | |
980 | if (dphi < 0) dphi += 2*TMath::Pi(); | |
981 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
982 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 983 | if (np>=fNladders) np-=fNladders; |
984 | if (np<0) np+=fNladders; | |
006b5f7f | 985 | |
986 | Double_t dz=fZOffset-z; | |
987 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 988 | if (nz>=fNdetectors) return -1; |
989 | if (nz<0) return -1; | |
006b5f7f | 990 | |
006b5f7f | 991 | return np*fNdetectors + nz; |
992 | } | |
993 | ||
994 | Double_t | |
61ab8ea8 | 995 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
996 | const { | |
a9a2d814 | 997 | //-------------------------------------------------------------------- |
998 | //This function returns the layer thickness at this point (units X0) | |
999 | //-------------------------------------------------------------------- | |
1000 | Double_t d=0.0085; | |
61ab8ea8 | 1001 | x0=21.82; |
a9a2d814 | 1002 | |
1003 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 1004 | Double_t dd=0.0034; |
1005 | d=dd; | |
1006 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1007 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
1008 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 1009 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 1010 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
1011 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1012 | d+=0.0034; | |
1013 | break; | |
1014 | } | |
1015 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
1016 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1017 | d+=0.0034; | |
1018 | break; | |
1019 | } | |
1020 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
1021 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 1022 | } |
1023 | } else | |
1024 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 1025 | Double_t dd=0.0034; |
1026 | d=dd; | |
1027 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1028 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
1029 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 1030 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 1031 | if (TMath::Abs(z-3.9*i)<0.15) { |
1032 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1033 | d+=dd; | |
1034 | break; | |
1035 | } | |
1036 | if (TMath::Abs(z+3.9*i)<0.15) { | |
1037 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1038 | d+=dd; | |
1039 | break; | |
1040 | } | |
1041 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
1042 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 1043 | } |
1044 | } else | |
1045 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 1046 | Double_t dd=0.0033; |
1047 | d=dd; | |
1048 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1049 | ||
1050 | if (TMath::Abs(y-1.80)<0.55) { | |
1051 | d+=0.016; | |
1052 | for (Int_t j=0; j<20; j++) { | |
1053 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1054 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1055 | } | |
1056 | } | |
1057 | if (TMath::Abs(y+1.80)<0.55) { | |
1058 | d+=0.016; | |
1059 | for (Int_t j=0; j<20; j++) { | |
1060 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1061 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | for (Int_t i=0; i<4; i++) { | |
1066 | if (TMath::Abs(z-7.3*i)<0.60) { | |
1067 | d+=dd; | |
1068 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1069 | break; | |
1070 | } | |
1071 | if (TMath::Abs(z+7.3*i)<0.60) { | |
1072 | d+=dd; | |
1073 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1074 | break; | |
1075 | } | |
a9a2d814 | 1076 | } |
1077 | } else | |
1078 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 1079 | Double_t dd=0.0063; x0=21.5; |
1080 | d=dd; | |
1081 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
1082 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
1083 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 1084 | } else |
1085 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 1086 | Double_t dd=0.0063; x0=21.5; |
1087 | d=dd; | |
1088 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
1089 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
1090 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 1091 | } |
1092 | ||
a9a2d814 | 1093 | return d; |
1094 | } | |
006b5f7f | 1095 | |
a9a2d814 | 1096 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 1097 | { |
1098 | //-------------------------------------------------------------------- | |
a9a2d814 | 1099 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 1100 | //-------------------------------------------------------------------- |
61ab8ea8 | 1101 | Double_t d=0.0028*3*3; //beam pipe |
1102 | Double_t x0=0; | |
006b5f7f | 1103 | |
1104 | Double_t xn=fLayers[fI].GetR(); | |
1105 | for (Int_t i=0; i<fI; i++) { | |
1106 | Double_t xi=fLayers[i].GetR(); | |
61ab8ea8 | 1107 | d+=fLayers[i].GetThickness(y,z,x0)*xi*xi; |
006b5f7f | 1108 | } |
1109 | ||
1110 | if (fI>1) { | |
61ab8ea8 | 1111 | Double_t xi=9.; |
1112 | d+=0.0097*xi*xi; | |
006b5f7f | 1113 | } |
1114 | ||
1115 | if (fI>3) { | |
1116 | Double_t xi=0.5*(fLayers[3].GetR()+fLayers[4].GetR()); | |
61ab8ea8 | 1117 | d+=0.0034*xi*xi; |
006b5f7f | 1118 | } |
61ab8ea8 | 1119 | |
006b5f7f | 1120 | return d/(xn*xn); |
1121 | } | |
1122 | ||
006b5f7f | 1123 | Int_t AliITStrackerV2::AliITSlayer::InRoad() const { |
1124 | //-------------------------------------------------------------------- | |
1125 | // This function returns number of clusters within the "window" | |
1126 | //-------------------------------------------------------------------- | |
1127 | Int_t ncl=0; | |
1128 | for (Int_t i=fI; i<fN; i++) { | |
1129 | const AliITSclusterV2 *c=fClusters[i]; | |
1130 | if (c->GetZ() > fZmax) break; | |
a9a2d814 | 1131 | if (c->IsUsed()) continue; |
006b5f7f | 1132 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); |
1133 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
1134 | ||
1135 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
1136 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
1137 | ||
1138 | if (y<fYmin) continue; | |
1139 | if (y>fYmax) continue; | |
1140 | ncl++; | |
1141 | } | |
1142 | return ncl; | |
1143 | } | |
1144 | ||
880f41b9 | 1145 | Bool_t |
c630aafd | 1146 | AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,const AliITStrackV2 *c) { |
4ab260d6 | 1147 | //-------------------------------------------------------------------- |
c630aafd | 1148 | // This function refits the track "t" at the position "x" using |
1149 | // the clusters from "c" | |
4ab260d6 | 1150 | //-------------------------------------------------------------------- |
880f41b9 | 1151 | Int_t index[kMaxLayer]; |
1152 | Int_t k; | |
1153 | for (k=0; k<kMaxLayer; k++) index[k]=-1; | |
c630aafd | 1154 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 1155 | for (k=0; k<nc; k++) { |
c630aafd | 1156 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 1157 | index[nl]=idx; |
1158 | } | |
880f41b9 | 1159 | |
4ab260d6 | 1160 | Int_t from, to, step; |
ee34184f | 1161 | if (xx > t->GetX()) { |
4ab260d6 | 1162 | from=0; to=kMaxLayer; |
1163 | step=+1; | |
1164 | } else { | |
1165 | from=kMaxLayer-1; to=-1; | |
1166 | step=-1; | |
1167 | } | |
1168 | ||
1169 | for (Int_t i=from; i != to; i += step) { | |
1170 | AliITSlayer &layer=fLayers[i]; | |
1171 | Double_t r=layer.GetR(); | |
1172 | ||
1173 | { | |
1174 | Double_t hI=i-0.5*step; | |
880f41b9 | 1175 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
4ab260d6 | 1176 | Double_t rs=0.5*(fLayers[i-step].GetR() + r); |
61ab8ea8 | 1177 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1178 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1179 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1180 | return kFALSE; |
1181 | } | |
1182 | } | |
1183 | } | |
1184 | ||
880f41b9 | 1185 | // remember old position [SR, GSI 18.02.2003] |
1186 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1187 | if (t->IsStartedTimeIntegral() && step==1) { | |
1188 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1189 | } | |
1190 | // | |
1191 | ||
4ab260d6 | 1192 | Double_t x,y,z; |
1193 | if (!t->GetGlobalXYZat(r,x,y,z)) { | |
1194 | return kFALSE; | |
1195 | } | |
1196 | Double_t phi=TMath::ATan2(y,x); | |
1197 | Int_t idet=layer.FindDetectorIndex(phi,z); | |
1198 | if (idet<0) { | |
1199 | return kFALSE; | |
1200 | } | |
1201 | const AliITSdetector &det=layer.GetDetector(idet); | |
1202 | phi=det.GetPhi(); | |
1203 | if (!t->Propagate(phi,det.GetR())) { | |
1204 | return kFALSE; | |
1205 | } | |
1206 | t->SetDetectorIndex(idet); | |
1207 | ||
1208 | const AliITSclusterV2 *cl=0; | |
1209 | Double_t maxchi2=kMaxChi2; | |
1210 | ||
1211 | Int_t idx=index[i]; | |
1212 | if (idx>0) { | |
1213 | const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx); | |
1214 | if (idet != c->GetDetectorIndex()) { | |
1215 | idet=c->GetDetectorIndex(); | |
1216 | const AliITSdetector &det=layer.GetDetector(idet); | |
1217 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1218 | return kFALSE; | |
1219 | } | |
1220 | t->SetDetectorIndex(idet); | |
1221 | } | |
1222 | Double_t chi2=t->GetPredictedChi2(c); | |
c630aafd | 1223 | if (chi2<maxchi2) { |
1224 | cl=c; | |
1225 | maxchi2=chi2; | |
1226 | } else { | |
1227 | return kFALSE; | |
1228 | } | |
4ab260d6 | 1229 | } |
4ab260d6 | 1230 | /* |
1231 | if (cl==0) | |
1232 | if (t->GetNumberOfClusters()>2) { | |
1233 | Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]); | |
1234 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]); | |
1235 | Double_t zmin=t->GetZ() - dz; | |
1236 | Double_t zmax=t->GetZ() + dz; | |
1237 | Double_t ymin=t->GetY() + phi*r - dy; | |
1238 | Double_t ymax=t->GetY() + phi*r + dy; | |
1239 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1240 | ||
1241 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
1242 | while ((c=layer.GetNextCluster(ci))!=0) { | |
1243 | if (idet != c->GetDetectorIndex()) continue; | |
1244 | Double_t chi2=t->GetPredictedChi2(c); | |
1245 | if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; } | |
1246 | } | |
1247 | } | |
1248 | */ | |
4ab260d6 | 1249 | if (cl) { |
1250 | if (!t->Update(cl,maxchi2,idx)) { | |
1251 | return kFALSE; | |
1252 | } | |
880f41b9 | 1253 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1254 | } |
1255 | ||
1256 | { | |
61ab8ea8 | 1257 | Double_t x0; |
1258 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1259 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1260 | } |
880f41b9 | 1261 | |
1262 | // track time update [SR, GSI 17.02.2003] | |
1263 | if (t->IsStartedTimeIntegral() && step==1) { | |
1264 | Double_t newX, newY, newZ; | |
1265 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1266 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1267 | (oldZ-newZ)*(oldZ-newZ); | |
1268 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1269 | } | |
1270 | // | |
4ab260d6 | 1271 | |
1272 | } | |
1273 | ||
ee34184f | 1274 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1275 | return kTRUE; |
1276 | } | |
1277 | ||
b87bd7cd | 1278 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1279 | //-------------------------------------------------------------------- | |
1280 | // This function marks clusters assigned to the track | |
1281 | //-------------------------------------------------------------------- | |
1282 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1283 | |
b87bd7cd | 1284 | AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0)); |
1285 | //if (c->GetQ()>2) c->Use(); | |
1286 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
1287 | c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1)); | |
1288 | //if (c->GetQ()>2) c->Use(); | |
1289 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
880f41b9 | 1290 | |
b87bd7cd | 1291 | } |