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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 | |
18856a77 | 18 | // It reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks |
19 | // and fills with them the ESD | |
006b5f7f | 20 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch |
a9a2d814 | 21 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch |
006b5f7f | 22 | //------------------------------------------------------------------------- |
1f9a65c4 | 23 | |
006b5f7f | 24 | #include <TFile.h> |
25 | #include <TTree.h> | |
26 | #include <TRandom.h> | |
006b5f7f | 27 | |
28 | #include "AliITSgeom.h" | |
29 | #include "AliITSRecPoint.h" | |
517b130f | 30 | #include "AliTPCtrack.h" |
c630aafd | 31 | #include "AliESD.h" |
006b5f7f | 32 | #include "AliITSclusterV2.h" |
33 | #include "AliITStrackerV2.h" | |
34 | ||
8676d691 | 35 | ClassImp(AliITStrackerV2) |
006b5f7f | 36 | |
18856a77 | 37 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; // ITS layers |
006b5f7f | 38 | |
c630aafd | 39 | AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() { |
006b5f7f | 40 | //-------------------------------------------------------------------- |
61ab8ea8 | 41 | //This is the AliITStrackerV2 constructor |
006b5f7f | 42 | //-------------------------------------------------------------------- |
006b5f7f | 43 | AliITSgeom *g=(AliITSgeom*)geom; |
44 | ||
45 | Float_t x,y,z; | |
46 | Int_t i; | |
c630aafd | 47 | for (i=1; i<kMaxLayer+1; i++) { |
006b5f7f | 48 | Int_t nlad=g->GetNladders(i); |
49 | Int_t ndet=g->GetNdetectors(i); | |
50 | ||
51 | g->GetTrans(i,1,1,x,y,z); | |
52 | Double_t r=TMath::Sqrt(x*x + y*y); | |
53 | Double_t poff=TMath::ATan2(y,x); | |
54 | Double_t zoff=z; | |
55 | ||
56 | g->GetTrans(i,1,2,x,y,z); | |
57 | r += TMath::Sqrt(x*x + y*y); | |
58 | g->GetTrans(i,2,1,x,y,z); | |
59 | r += TMath::Sqrt(x*x + y*y); | |
60 | g->GetTrans(i,2,2,x,y,z); | |
61 | r += TMath::Sqrt(x*x + y*y); | |
62 | r*=0.25; | |
63 | ||
18856a77 | 64 | new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); |
006b5f7f | 65 | |
66 | for (Int_t j=1; j<nlad+1; j++) { | |
67 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
68 | Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift); | |
69 | Double_t rot[9]; g->GetRotMatrix(i,j,k,rot); | |
70 | ||
f363d377 | 71 | Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi(); |
72 | phi+=TMath::Pi()/2; | |
73 | if (i==1) phi+=TMath::Pi(); | |
74 | Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi); | |
75 | Double_t r=x*cp+y*sp; | |
006b5f7f | 76 | |
18856a77 | 77 | AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1); |
006b5f7f | 78 | new(&det) AliITSdetector(r,phi); |
79 | } | |
80 | } | |
c630aafd | 81 | |
006b5f7f | 82 | } |
83 | ||
61ab8ea8 | 84 | fI=kMaxLayer; |
743a19f2 | 85 | |
61ab8ea8 | 86 | fPass=0; |
87 | fConstraint[0]=1; fConstraint[1]=0; | |
8676d691 | 88 | |
89 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
90 | SetVertex(xyz,ers); | |
c0dd5278 | 91 | |
92 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
93 | fLastLayerToTrackTo=kLastLayerToTrackTo; | |
94 | ||
95 | } | |
96 | ||
97 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
98 | //-------------------------------------------------------------------- | |
99 | //This function set masks of the layers which must be not skipped | |
100 | //-------------------------------------------------------------------- | |
101 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i]; | |
61ab8ea8 | 102 | } |
006b5f7f | 103 | |
c630aafd | 104 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 105 | //-------------------------------------------------------------------- |
106 | //This function loads ITS clusters | |
107 | //-------------------------------------------------------------------- | |
61ab8ea8 | 108 | TBranch *branch=cTree->GetBranch("Clusters"); |
109 | if (!branch) { | |
c630aafd | 110 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 111 | return 1; |
61ab8ea8 | 112 | } |
006b5f7f | 113 | |
61ab8ea8 | 114 | TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy; |
115 | branch->SetAddress(&clusters); | |
006b5f7f | 116 | |
61ab8ea8 | 117 | Int_t j=0; |
118 | for (Int_t i=0; i<kMaxLayer; i++) { | |
18856a77 | 119 | Int_t ndet=fgLayers[i].GetNdetectors(); |
120 | Int_t jmax = j + fgLayers[i].GetNladders()*ndet; | |
61ab8ea8 | 121 | for (; j<jmax; j++) { |
122 | if (!cTree->GetEvent(j)) continue; | |
123 | Int_t ncl=clusters->GetEntriesFast(); | |
124 | while (ncl--) { | |
125 | AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl); | |
18856a77 | 126 | fgLayers[i].InsertCluster(new AliITSclusterV2(*c)); |
61ab8ea8 | 127 | } |
128 | clusters->Delete(); | |
129 | } | |
18856a77 | 130 | fgLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 131 | } |
c630aafd | 132 | |
8676d691 | 133 | return 0; |
61ab8ea8 | 134 | } |
006b5f7f | 135 | |
61ab8ea8 | 136 | void AliITStrackerV2::UnloadClusters() { |
137 | //-------------------------------------------------------------------- | |
138 | //This function unloads ITS clusters | |
139 | //-------------------------------------------------------------------- | |
18856a77 | 140 | for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters(); |
006b5f7f | 141 | } |
142 | ||
880f41b9 | 143 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
144 | //-------------------------------------------------------------------- | |
145 | // Correction for the material between the TPC and the ITS | |
146 | // (should it belong to the TPC code ?) | |
147 | //-------------------------------------------------------------------- | |
148 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
149 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
150 | Double_t yr=12.8, dr=0.03; // rods ? | |
151 | Double_t zm=0.2, dm=0.40; // membrane | |
152 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
153 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
154 | ||
155 | if (t->GetX() > riw) { | |
156 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
157 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
158 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
159 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
160 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
161 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
162 | if (!t->PropagateTo(rs,ds)) return 1; | |
163 | } else if (t->GetX() < rs) { | |
164 | if (!t->PropagateTo(rs,-ds)) return 1; | |
165 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
166 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
167 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
168 | if (!t->PropagateTo(riw,-diw,x0iw)) return 1; | |
169 | } else { | |
170 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
171 | return 1; | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
c630aafd | 177 | Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) { |
006b5f7f | 178 | //-------------------------------------------------------------------- |
c630aafd | 179 | // This functions reconstructs ITS tracks |
180 | // The clusters must be already loaded ! | |
006b5f7f | 181 | //-------------------------------------------------------------------- |
c630aafd | 182 | TObjArray itsTracks(15000); |
006b5f7f | 183 | |
c630aafd | 184 | {/* Read ESD tracks */ |
185 | Int_t nentr=event->GetNumberOfTracks(); | |
186 | Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr); | |
187 | while (nentr--) { | |
188 | AliESDtrack *esd=event->GetTrack(nentr); | |
189 | ||
190 | if (esd->GetStatus() != AliESDtrack::kTPCin) continue; | |
191 | ||
192 | AliITStrackV2 *t=0; | |
193 | try { | |
194 | t=new AliITStrackV2(*esd); | |
195 | } catch (const Char_t *msg) { | |
196 | Warning("Clusters2Tracks",msg); | |
197 | delete t; | |
198 | continue; | |
199 | } | |
200 | if (TMath::Abs(t->GetD())>4) continue; | |
006b5f7f | 201 | |
c630aafd | 202 | if (CorrectForDeadZoneMaterial(t)!=0) { |
203 | Warning("Clusters2Tracks", | |
204 | "failed to correct for the material in the dead zone !\n"); | |
205 | delete t; | |
206 | continue; | |
207 | } | |
208 | itsTracks.AddLast(t); | |
209 | } | |
210 | } /* End Read ESD tracks */ | |
211 | ||
212 | itsTracks.Sort(); | |
213 | Int_t nentr=itsTracks.GetEntriesFast(); | |
214 | ||
215 | Int_t ntrk=0; | |
216 | for (fPass=0; fPass<2; fPass++) { | |
217 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
218 | for (Int_t i=0; i<nentr; i++) { | |
219 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
220 | if (t==0) continue; //this track has been already tracked | |
221 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label | |
222 | ||
223 | ResetTrackToFollow(*t); | |
224 | ResetBestTrack(); | |
225 | ||
226 | for (FollowProlongation(); fI<kMaxLayer; fI++) { | |
227 | while (TakeNextProlongation()) FollowProlongation(); | |
228 | } | |
229 | ||
230 | if (fBestTrack.GetNumberOfClusters() == 0) continue; | |
231 | ||
232 | if (fConstraint[fPass]) { | |
233 | ResetTrackToFollow(*t); | |
234 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
235 | ResetBestTrack(); | |
236 | } | |
237 | ||
238 | fBestTrack.SetLabel(tpcLabel); | |
239 | fBestTrack.CookdEdx(); | |
240 | CookLabel(&fBestTrack,0.); //For comparison only | |
241 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
242 | UseClusters(&fBestTrack); | |
243 | delete itsTracks.RemoveAt(i); | |
244 | ntrk++; | |
245 | } | |
246 | } | |
247 | ||
248 | itsTracks.Delete(); | |
249 | ||
250 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | Int_t AliITStrackerV2::Clusters2Tracks(TTree *tpcTree, TTree *itsTree) { | |
256 | //-------------------------------------------------------------------- | |
257 | // This functions reconstructs ITS tracks | |
258 | // The clusters must be already loaded ! | |
259 | //-------------------------------------------------------------------- | |
a7554aa9 | 260 | Int_t nentr=0; TObjArray itsTracks(15000); |
7f6ddf58 | 261 | |
262 | {/* Read TPC tracks */ | |
7f6ddf58 | 263 | AliTPCtrack *itrack=new AliTPCtrack; |
c630aafd | 264 | TBranch *branch=tpcTree->GetBranch("tracks"); |
265 | if (!branch) { | |
266 | Error("Clusters2Tracks","Can't get the branch !"); | |
267 | return 1; | |
268 | } | |
7f6ddf58 | 269 | tpcTree->SetBranchAddress("tracks",&itrack); |
270 | nentr=(Int_t)tpcTree->GetEntries(); | |
c630aafd | 271 | |
880f41b9 | 272 | Info("Clusters2Tracks","Number of TPC tracks: %d\n",nentr); |
273 | ||
7f6ddf58 | 274 | for (Int_t i=0; i<nentr; i++) { |
275 | tpcTree->GetEvent(i); | |
4ab260d6 | 276 | AliITStrackV2 *t=0; |
277 | try { | |
278 | t=new AliITStrackV2(*itrack); | |
279 | } catch (const Char_t *msg) { | |
8676d691 | 280 | Warning("Clusters2Tracks",msg); |
4ab260d6 | 281 | delete t; |
282 | continue; | |
283 | } | |
a9a2d814 | 284 | if (TMath::Abs(t->GetD())>4) continue; |
285 | ||
880f41b9 | 286 | if (CorrectForDeadZoneMaterial(t)!=0) { |
287 | Warning("Clusters2Tracks", | |
288 | "failed to correct for the material in the dead zone !\n"); | |
289 | continue; | |
290 | } | |
a9a2d814 | 291 | |
292 | itsTracks.AddLast(t); | |
7f6ddf58 | 293 | } |
7f6ddf58 | 294 | delete itrack; |
006b5f7f | 295 | } |
7f6ddf58 | 296 | itsTracks.Sort(); |
880f41b9 | 297 | nentr=itsTracks.GetEntriesFast(); |
006b5f7f | 298 | |
7f6ddf58 | 299 | |
006b5f7f | 300 | AliITStrackV2 *otrack=&fBestTrack; |
c630aafd | 301 | TBranch *branch=itsTree->GetBranch("tracks"); |
302 | if (!branch) itsTree->Branch("tracks","AliITStrackV2",&otrack,32000,3); | |
303 | else branch->SetAddress(&otrack); | |
006b5f7f | 304 | |
7f6ddf58 | 305 | for (fPass=0; fPass<2; fPass++) { |
306 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
307 | for (Int_t i=0; i<nentr; i++) { | |
7f6ddf58 | 308 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); |
309 | if (t==0) continue; //this track has been already tracked | |
310 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label | |
a9a2d814 | 311 | |
4ab260d6 | 312 | ResetTrackToFollow(*t); |
7f6ddf58 | 313 | ResetBestTrack(); |
006b5f7f | 314 | |
c630aafd | 315 | for (FollowProlongation(); fI<kMaxLayer; fI++) { |
316 | while (TakeNextProlongation()) FollowProlongation(); | |
317 | } | |
006b5f7f | 318 | |
c0dd5278 | 319 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
8676d691 | 320 | |
321 | if (fConstraint[fPass]) { | |
c630aafd | 322 | ResetTrackToFollow(*t); |
323 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
324 | ResetBestTrack(); | |
8676d691 | 325 | } |
4ab260d6 | 326 | |
8676d691 | 327 | fBestTrack.SetLabel(tpcLabel); |
328 | fBestTrack.CookdEdx(); | |
329 | CookLabel(&fBestTrack,0.); //For comparison only | |
c630aafd | 330 | itsTree->Fill(); |
8676d691 | 331 | UseClusters(&fBestTrack); |
332 | delete itsTracks.RemoveAt(i); | |
7f6ddf58 | 333 | } |
006b5f7f | 334 | } |
006b5f7f | 335 | |
c630aafd | 336 | nentr=(Int_t)itsTree->GetEntries(); |
880f41b9 | 337 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr); |
8676d691 | 338 | |
7f6ddf58 | 339 | itsTracks.Delete(); |
61ab8ea8 | 340 | |
c630aafd | 341 | return 0; |
342 | } | |
343 | ||
344 | Int_t AliITStrackerV2::PropagateBack(AliESD *event) { | |
345 | //-------------------------------------------------------------------- | |
346 | // This functions propagates reconstructed ITS tracks back | |
347 | // The clusters must be loaded ! | |
348 | //-------------------------------------------------------------------- | |
349 | Int_t nentr=event->GetNumberOfTracks(); | |
350 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
351 | ||
352 | Int_t ntrk=0; | |
353 | for (Int_t i=0; i<nentr; i++) { | |
354 | AliESDtrack *esd=event->GetTrack(i); | |
355 | ||
356 | if (esd->GetStatus()!=(AliESDtrack::kTPCin|AliESDtrack::kITSin)) continue; | |
357 | ||
358 | AliITStrackV2 *t=0; | |
359 | try { | |
360 | t=new AliITStrackV2(*esd); | |
361 | } catch (const Char_t *msg) { | |
362 | Warning("PropagateBack",msg); | |
363 | delete t; | |
364 | continue; | |
365 | } | |
366 | ||
367 | ResetTrackToFollow(*t); | |
368 | ||
369 | // propagete to vertex [SR, GSI 17.02.2003] | |
370 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); | |
371 | fTrackToFollow.PropagateToVertex(); | |
372 | ||
373 | // Start Time measurement [SR, GSI 17.02.2003] | |
374 | fTrackToFollow.StartTimeIntegral(); | |
375 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
376 | ||
377 | fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters(); | |
378 | if (RefitAt(49.,&fTrackToFollow,t)) { | |
379 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
380 | Warning("PropagateBack", | |
381 | "failed to correct for the material in the dead zone !\n"); | |
382 | delete t; | |
383 | continue; | |
384 | } | |
385 | fTrackToFollow.SetLabel(t->GetLabel()); | |
386 | fTrackToFollow.CookdEdx(); | |
387 | CookLabel(&fTrackToFollow,0.); //For comparison only | |
388 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
389 | UseClusters(&fTrackToFollow); | |
390 | ntrk++; | |
391 | } | |
392 | delete t; | |
393 | } | |
394 | ||
395 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 396 | |
83d73500 | 397 | return 0; |
398 | } | |
399 | ||
c630aafd | 400 | Int_t AliITStrackerV2::PropagateBack(TTree *inp, TTree *out) { |
14825d5a | 401 | //-------------------------------------------------------------------- |
402 | //This functions propagates reconstructed ITS tracks back | |
403 | //-------------------------------------------------------------------- | |
088e0b8d | 404 | Error("PropagateBack","This method is not converted to NewIO yet (Args: %x , %x )\n",inp,out); |
c630aafd | 405 | return 1; |
406 | /* | |
407 | TFile *in=(TFile*)inp; | |
408 | TDirectory *savedir=gDirectory; | |
409 | ||
8676d691 | 410 | if (LoadClusters()!=0) return 1; |
61ab8ea8 | 411 | |
c630aafd | 412 | if (!in->IsOpen()) { |
413 | Error("PropagateBack","file with ITS tracks is not open !\n"); | |
8676d691 | 414 | return 1; |
c630aafd | 415 | } |
416 | ||
417 | if (!out->IsOpen()) { | |
418 | Error("PropagateBack","file for back propagated ITS tracks is not open !\n"); | |
419 | return 2; | |
420 | } | |
421 | ||
422 | in->cd(); | |
423 | ||
424 | Char_t tname[100]; | |
425 | sprintf(tname,"TreeT_ITS_%d",GetEventNumber()); | |
426 | TTree *itsTree=(TTree*)in->Get(tname); | |
14825d5a | 427 | if (!itsTree) { |
8676d691 | 428 | Error("PropagateBack","can't get a tree with ITS tracks !\n"); |
429 | return 3; | |
14825d5a | 430 | } |
431 | AliITStrackV2 *itrack=new AliITStrackV2; | |
432 | itsTree->SetBranchAddress("tracks",&itrack); | |
433 | ||
c630aafd | 434 | out->cd(); |
61ab8ea8 | 435 | |
c630aafd | 436 | sprintf(tname,"TreeT_ITSb_%d",GetEventNumber()); |
437 | TTree backTree(tname,"Tree with back propagated ITS tracks"); | |
14825d5a | 438 | AliTPCtrack *otrack=0; |
f29dbb4b | 439 | backTree.Branch("tracks","AliTPCtrack",&otrack,32000,2); |
14825d5a | 440 | |
14825d5a | 441 | Int_t nentr=(Int_t)itsTree->GetEntries(); |
880f41b9 | 442 | Int_t i; |
443 | for (i=0; i<nentr; i++) { | |
14825d5a | 444 | itsTree->GetEvent(i); |
880f41b9 | 445 | Int_t itsLabel=itrack->GetLabel(); //save the ITS track label |
14825d5a | 446 | ResetTrackToFollow(*itrack); |
f29dbb4b | 447 | |
448 | // propagete to vertex [SR, GSI 17.02.2003] | |
449 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); | |
450 | fTrackToFollow.PropagateToVertex(); | |
451 | ||
452 | // Start Time measurement [SR, GSI 17.02.2003] | |
453 | fTrackToFollow.StartTimeIntegral(); | |
454 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
455 | // | |
456 | ||
3a382e5c | 457 | fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters(); |
458 | if (!RefitAt(49.,&fTrackToFollow,itrack)) continue; | |
f29dbb4b | 459 | |
880f41b9 | 460 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { |
461 | Warning("PropagateBack", | |
462 | "failed to correct for the material in the dead zone !\n"); | |
463 | continue; | |
464 | } | |
465 | ||
466 | fTrackToFollow.SetLabel(itsLabel); | |
467 | otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha()); | |
468 | backTree.Fill(); delete otrack; | |
469 | UseClusters(&fTrackToFollow); | |
470 | } | |
471 | i=(Int_t)backTree.GetEntries(); | |
c630aafd | 472 | backTree.Write(); |
14825d5a | 473 | |
880f41b9 | 474 | Info("PropagateBack","Number of ITS tracks: %d\n",nentr); |
475 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",i); | |
f29dbb4b | 476 | |
880f41b9 | 477 | delete itrack; |
c630aafd | 478 | delete itsTree; //Thanks to Mariana Bondila |
479 | ||
880f41b9 | 480 | UnloadClusters(); |
481 | ||
c630aafd | 482 | savedir->cd(); |
483 | ||
880f41b9 | 484 | return 0; |
c630aafd | 485 | */ |
880f41b9 | 486 | } |
487 | ||
c630aafd | 488 | Int_t AliITStrackerV2::RefitInward(AliESD *event) { |
83d73500 | 489 | //-------------------------------------------------------------------- |
490 | // This functions refits ITS tracks using the | |
491 | // "inward propagated" TPC tracks | |
c630aafd | 492 | // The clusters must be loaded ! |
83d73500 | 493 | //-------------------------------------------------------------------- |
c630aafd | 494 | Int_t nentr=event->GetNumberOfTracks(); |
495 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
496 | ||
497 | Int_t ntrk=0; | |
498 | for (Int_t i=0; i<nentr; i++) { | |
499 | AliESDtrack *esd=event->GetTrack(i); | |
500 | ||
501 | ULong_t flags = AliESDtrack::kITSin | AliESDtrack::kTPCrefit; | |
502 | ||
503 | if ( (esd->GetStatus() & flags) != flags ) continue; | |
504 | if ( esd->GetStatus() & AliESDtrack::kITSrefit) continue; | |
505 | ||
506 | AliITStrackV2 *t=0; | |
507 | try { | |
508 | t=new AliITStrackV2(*esd); | |
509 | } catch (const Char_t *msg) { | |
510 | Warning("RefitInward",msg); | |
511 | delete t; | |
512 | continue; | |
513 | } | |
514 | ||
515 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
516 | Warning("RefitInward", | |
517 | "failed to correct for the material in the dead zone !\n"); | |
518 | delete t; | |
519 | continue; | |
520 | } | |
521 | ||
522 | ResetTrackToFollow(*t); | |
523 | fTrackToFollow.ResetClusters(); | |
524 | ||
525 | //Refitting... | |
526 | if (RefitAt(3.7, &fTrackToFollow, t)) { | |
527 | fTrackToFollow.SetLabel(t->GetLabel()); | |
528 | fTrackToFollow.CookdEdx(); | |
529 | CookLabel(&fTrackToFollow,0.); //For comparison only | |
18856a77 | 530 | |
531 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); //The beam pipe | |
532 | fTrackToFollow.PropagateToVertex(); | |
533 | ||
c630aafd | 534 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit); |
535 | UseClusters(&fTrackToFollow); | |
536 | ntrk++; | |
537 | } | |
538 | delete t; | |
539 | } | |
540 | ||
541 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 542 | |
c630aafd | 543 | return 0; |
544 | } | |
83d73500 | 545 | |
c630aafd | 546 | Int_t AliITStrackerV2::RefitInward(TTree *in, TTree *out) { |
547 | //-------------------------------------------------------------------- | |
548 | // This functions refits ITS tracks using the | |
549 | // "inward propagated" TPC tracks | |
550 | //-------------------------------------------------------------------- | |
088e0b8d | 551 | Error("RefitInward","This method is not converted to NewIO yet (Args: %x , %x )\n",in,out); |
c630aafd | 552 | return 1; |
553 | /* | |
880f41b9 | 554 | TFile *in=(TFile*)inp; |
c630aafd | 555 | TDirectory *savedir=gDirectory; |
14825d5a | 556 | |
880f41b9 | 557 | if (LoadClusters()!=0) return 1; |
558 | ||
c630aafd | 559 | if (!inSeeds->IsOpen()) { |
880f41b9 | 560 | Error("RefitInward","file with inward TPC tracks is not open !\n"); |
561 | return 2; | |
562 | } | |
563 | ||
c630aafd | 564 | if (!in->IsOpen()) { |
565 | Error("RefitInward","file with ITS tracks is not open !\n"); | |
566 | return 2; | |
567 | } | |
568 | ||
880f41b9 | 569 | if (!out->IsOpen()) { |
570 | Error("RefitInward","file for inward ITS tracks is not open !\n"); | |
571 | return 3; | |
572 | } | |
573 | ||
574 | Int_t i; | |
575 | ||
576 | //LUT used for the track matching (S.Radomski's idea) | |
577 | const Int_t nLab = 400000; // limit on the number of track labels | |
578 | Int_t lut[nLab]; | |
579 | for(i=0; i<nLab; i++) lut[i] = -1; | |
580 | ||
581 | Char_t tname[100]; | |
582 | ||
583 | TObjArray itsTracks(15000); | |
c630aafd | 584 | {// Read the ITS tracks |
880f41b9 | 585 | sprintf(tname,"TreeT_ITS_%d",GetEventNumber()); |
c630aafd | 586 | TTree *itsTree=(TTree*)in->Get(tname); |
880f41b9 | 587 | if (!itsTree) { |
588 | Error("RefitInward","can't get a tree with ITS tracks !\n"); | |
589 | return 3; | |
14825d5a | 590 | } |
880f41b9 | 591 | AliITStrackV2 *itrack=new AliITStrackV2; |
592 | itsTree->SetBranchAddress("tracks",&itrack); | |
593 | Int_t nits=(Int_t)itsTree->GetEntries(); | |
594 | ||
595 | Info("RefitInward","Number of ITS tracks: %d\n",nits); | |
596 | ||
597 | for (Int_t i=0; i<nits; i++) { | |
598 | itsTree->GetEvent(i); | |
599 | Int_t lab=TMath::Abs(itrack->GetLabel()); | |
600 | if (lab < nLab) { | |
601 | if (lut[lab]>=0) Warning("RefitInward","double track %d\n",lab); | |
602 | lut[lab]=i; | |
603 | } else { | |
604 | Warning("RefitInward","Too big ITS track label: %d\n!",lab); | |
605 | continue; | |
606 | } | |
607 | itsTracks.AddLast(new AliITStrackV2(*itrack)); | |
14825d5a | 608 | } |
880f41b9 | 609 | delete itsTree; |
610 | delete itrack; | |
14825d5a | 611 | } |
612 | ||
c630aafd | 613 | //Get the input seeds tree |
614 | inSeeds->cd(); | |
880f41b9 | 615 | sprintf(tname,"tracksTPC_%d",GetEventNumber()); |
c630aafd | 616 | TTree *tpcTree=(TTree*)inSeeds->Get(tname); |
880f41b9 | 617 | if (!tpcTree) { |
618 | Error("RefitInward","can't get a tree with TPC tracks !\n"); | |
619 | return 3; | |
620 | } | |
621 | AliTPCtrack *itrack=new AliTPCtrack; | |
622 | tpcTree->SetBranchAddress("tracks",&itrack); | |
623 | Int_t ntpc=(Int_t)tpcTree->GetEntries(); | |
61ab8ea8 | 624 | |
880f41b9 | 625 | Info("RefitInward","Number of TPC tracks: %d\n",ntpc); |
14825d5a | 626 | |
c630aafd | 627 | //Create the output tree |
628 | out->cd(); | |
629 | sprintf(tname,"TreeT_ITSinward_%d",GetEventNumber()); | |
630 | TTree outTree(tname,"Tree with inward refitted ITS tracks"); | |
631 | AliITStrackV2 *otrack=0; | |
632 | outTree.Branch("tracks","AliITStrackV2",&otrack,32000,0); | |
633 | ||
880f41b9 | 634 | for (i=0; i<ntpc; i++) { |
635 | tpcTree->GetEvent(i); | |
880f41b9 | 636 | try { |
c630aafd | 637 | otrack=new AliITStrackV2(*itrack); |
880f41b9 | 638 | } catch (const Char_t *msg) { |
639 | Warning("RefitInward",msg); | |
c630aafd | 640 | delete otrack; |
880f41b9 | 641 | continue; |
642 | } | |
643 | //check if this track was reconstructed in the ITS | |
c630aafd | 644 | Int_t lab=TMath::Abs(otrack->GetLabel()); |
880f41b9 | 645 | if (lab >= nLab) { |
646 | Warning("RefitInward","Too big TPC track label: %d\n!",lab); | |
647 | continue; | |
648 | } | |
649 | Int_t idx=lut[lab]; | |
650 | if (idx<0) continue; //no prolongation in the ITS for this track | |
651 | ||
c630aafd | 652 | if (CorrectForDeadZoneMaterial(otrack)!=0) { |
880f41b9 | 653 | Warning("RefitInward", |
654 | "failed to correct for the material in the dead zone !\n"); | |
655 | continue; | |
656 | } | |
14825d5a | 657 | |
880f41b9 | 658 | //Refitting... |
c630aafd | 659 | { |
660 | AliITStrackV2 *ctrack=(AliITStrackV2*)itsTracks.UncheckedAt(idx); | |
661 | if (!RefitAt(3.7, otrack, ctrack)) continue; | |
662 | } | |
880f41b9 | 663 | otrack->SetLabel(itrack->GetLabel()); //For comparison only |
664 | otrack->CookdEdx(); | |
665 | CookLabel(otrack,0.); //For comparison only | |
666 | outTree.Fill(); | |
c630aafd | 667 | delete otrack; |
880f41b9 | 668 | } |
669 | i=(Int_t)outTree.GetEntries(); | |
670 | Info("RefitInward","Number of inward refitted ITS tracks: %d\n",i); | |
671 | outTree.Write(); | |
c7ee21ca | 672 | |
880f41b9 | 673 | delete tpcTree; |
674 | delete itrack; | |
c630aafd | 675 | UnloadClusters(); |
88cb7938 | 676 | itsTracks.Delete(); |
61ab8ea8 | 677 | |
c630aafd | 678 | savedir->cd(); |
679 | ||
14825d5a | 680 | return 0; |
c630aafd | 681 | */ |
14825d5a | 682 | } |
006b5f7f | 683 | |
684 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { | |
685 | //-------------------------------------------------------------------- | |
686 | // Return pointer to a given cluster | |
687 | //-------------------------------------------------------------------- | |
688 | Int_t l=(index & 0xf0000000) >> 28; | |
689 | Int_t c=(index & 0x0fffffff) >> 00; | |
18856a77 | 690 | return fgLayers[l].GetCluster(c); |
006b5f7f | 691 | } |
692 | ||
693 | ||
694 | void AliITStrackerV2::FollowProlongation() { | |
695 | //-------------------------------------------------------------------- | |
696 | //This function finds a track prolongation | |
697 | //-------------------------------------------------------------------- | |
c0dd5278 | 698 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 699 | Int_t i=fI-1; |
8676d691 | 700 | |
18856a77 | 701 | AliITSlayer &layer=fgLayers[i]; |
a9a2d814 | 702 | AliITStrackV2 &track=fTracks[i]; |
006b5f7f | 703 | |
14825d5a | 704 | Double_t r=layer.GetR(); |
61ab8ea8 | 705 | |
a9a2d814 | 706 | if (i==3 || i==1) { |
18856a77 | 707 | Double_t rs=0.5*(fgLayers[i+1].GetR() + r); |
61ab8ea8 | 708 | Double_t d=0.0034, x0=38.6; |
709 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
710 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 711 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 712 | return; |
a9a2d814 | 713 | } |
006b5f7f | 714 | } |
715 | ||
716 | //find intersection | |
717 | Double_t x,y,z; | |
14825d5a | 718 | if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) { |
8676d691 | 719 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 720 | return; |
006b5f7f | 721 | } |
722 | Double_t phi=TMath::ATan2(y,x); | |
f363d377 | 723 | |
006b5f7f | 724 | Int_t idet=layer.FindDetectorIndex(phi,z); |
725 | if (idet<0) { | |
8676d691 | 726 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 727 | return; |
006b5f7f | 728 | } |
729 | ||
730 | //propagate to the intersection | |
731 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 732 | phi=det.GetPhi(); |
a9a2d814 | 733 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 734 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 735 | return; |
006b5f7f | 736 | } |
737 | fTrackToFollow.SetDetectorIndex(idet); | |
738 | ||
739 | //Select possible prolongations and store the current track estimation | |
740 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
8676d691 | 741 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); |
742 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); | |
743 | Double_t road=layer.GetRoad(); | |
744 | if (dz*dy>road*road) { | |
745 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
746 | dz=road*scz; dy=road*scy; | |
747 | } | |
b87bd7cd | 748 | |
749 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); | |
14825d5a | 750 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
7f6ddf58 | 751 | if (dz > kMaxRoad) { |
8676d691 | 752 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 753 | return; |
006b5f7f | 754 | } |
a9a2d814 | 755 | |
c0dd5278 | 756 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 757 | |
b87bd7cd | 758 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); |
14825d5a | 759 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
7f6ddf58 | 760 | if (dy > kMaxRoad) { |
8676d691 | 761 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 762 | return; |
006b5f7f | 763 | } |
a9a2d814 | 764 | |
7f6ddf58 | 765 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 766 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 767 | Double_t ymin=track.GetY() + r*phi - dy; |
768 | Double_t ymax=track.GetY() + r*phi + dy; | |
a9a2d814 | 769 | layer.SelectClusters(zmin,zmax,ymin,ymax); |
770 | fI--; | |
006b5f7f | 771 | |
006b5f7f | 772 | //take another prolongation |
c0dd5278 | 773 | if (!TakeNextProlongation()) |
774 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 775 | |
776 | } | |
777 | ||
778 | //deal with the best track | |
779 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
780 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
781 | if (ncl) | |
782 | if (ncl >= nclb) { | |
783 | Double_t chi2=fTrackToFollow.GetChi2(); | |
784 | if (chi2/ncl < kChi2PerCluster) { | |
785 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { | |
786 | ResetBestTrack(); | |
787 | } | |
788 | } | |
789 | } | |
790 | ||
006b5f7f | 791 | } |
792 | ||
006b5f7f | 793 | Int_t AliITStrackerV2::TakeNextProlongation() { |
794 | //-------------------------------------------------------------------- | |
a9a2d814 | 795 | // This function takes another track prolongation |
796 | // | |
797 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 798 | //-------------------------------------------------------------------- |
18856a77 | 799 | AliITSlayer &layer=fgLayers[fI]; |
4ab260d6 | 800 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 801 | |
b87bd7cd | 802 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]); |
803 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]); | |
8676d691 | 804 | Double_t road=layer.GetRoad(); |
805 | if (dz*dy>road*road) { | |
806 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
807 | dz=road*scz; dy=road*scy; | |
808 | } | |
006b5f7f | 809 | |
810 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
811 | Double_t chi2=12345.; | |
812 | while ((c=layer.GetNextCluster(ci))!=0) { | |
006b5f7f | 813 | Int_t idet=c->GetDetectorIndex(); |
814 | ||
4ab260d6 | 815 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 816 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 817 | ResetTrackToFollow(fTracks[fI]); |
818 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 819 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 820 | continue; |
821 | } | |
4ab260d6 | 822 | fTrackToFollow.SetDetectorIndex(idet); |
823 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 824 | } |
825 | ||
4ab260d6 | 826 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
827 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 828 | |
4ab260d6 | 829 | chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break; |
006b5f7f | 830 | } |
831 | ||
006b5f7f | 832 | if (chi2>=kMaxChi2) return 0; |
833 | if (!c) return 0; | |
834 | ||
006b5f7f | 835 | if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) { |
8676d691 | 836 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 837 | return 0; |
838 | } | |
23efe5f1 | 839 | |
4ab260d6 | 840 | if (fTrackToFollow.GetNumberOfClusters()>1) |
841 | if (TMath::Abs(fTrackToFollow.GetD())>4) return 0; | |
842 | ||
a9a2d814 | 843 | fTrackToFollow. |
844 | SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. | |
845 | ||
846 | { | |
880f41b9 | 847 | Double_t x0; |
61ab8ea8 | 848 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 849 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 850 | } |
4ab260d6 | 851 | |
a9a2d814 | 852 | if (fConstraint[fPass]) { |
4ab260d6 | 853 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 854 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
855 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
856 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 857 | } |
006b5f7f | 858 | |
006b5f7f | 859 | return 1; |
860 | } | |
861 | ||
862 | ||
006b5f7f | 863 | AliITStrackerV2::AliITSlayer::AliITSlayer() { |
864 | //-------------------------------------------------------------------- | |
865 | //default AliITSlayer constructor | |
866 | //-------------------------------------------------------------------- | |
867 | fN=0; | |
868 | fDetectors=0; | |
869 | } | |
870 | ||
871 | AliITStrackerV2::AliITSlayer:: | |
872 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) { | |
873 | //-------------------------------------------------------------------- | |
874 | //main AliITSlayer constructor | |
875 | //-------------------------------------------------------------------- | |
876 | fR=r; fPhiOffset=p; fZOffset=z; | |
877 | fNladders=nl; fNdetectors=nd; | |
878 | fDetectors=new AliITSdetector[fNladders*fNdetectors]; | |
879 | ||
880 | fN=0; | |
881 | fI=0; | |
b87bd7cd | 882 | |
883 | fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster | |
006b5f7f | 884 | } |
885 | ||
886 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
887 | //-------------------------------------------------------------------- | |
888 | // AliITSlayer destructor | |
889 | //-------------------------------------------------------------------- | |
890 | delete[] fDetectors; | |
891 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
892 | } | |
893 | ||
61ab8ea8 | 894 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
895 | //-------------------------------------------------------------------- | |
896 | // This function removes loaded clusters | |
897 | //-------------------------------------------------------------------- | |
898 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
899 | fN=0; | |
900 | fI=0; | |
901 | } | |
902 | ||
b87bd7cd | 903 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
904 | //-------------------------------------------------------------------- | |
905 | // This function calculates the road defined by the cluster density | |
906 | //-------------------------------------------------------------------- | |
907 | Int_t n=0; | |
908 | for (Int_t i=0; i<fN; i++) { | |
909 | if (TMath::Abs(fClusters[i]->GetZ())<fR) n++; | |
910 | } | |
911 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
912 | } | |
913 | ||
006b5f7f | 914 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSclusterV2 *c) { |
915 | //-------------------------------------------------------------------- | |
916 | //This function adds a cluster to this layer | |
917 | //-------------------------------------------------------------------- | |
918 | if (fN==kMaxClusterPerLayer) { | |
8676d691 | 919 | ::Error("InsertCluster","Too many clusters !\n"); |
920 | return 1; | |
006b5f7f | 921 | } |
922 | ||
923 | if (fN==0) {fClusters[fN++]=c; return 0;} | |
924 | Int_t i=FindClusterIndex(c->GetZ()); | |
925 | memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*)); | |
926 | fClusters[i]=c; fN++; | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | Int_t AliITStrackerV2::AliITSlayer::FindClusterIndex(Double_t z) const { | |
932 | //-------------------------------------------------------------------- | |
933 | // This function returns the index of the nearest cluster | |
934 | //-------------------------------------------------------------------- | |
935 | if (fN==0) return 0; | |
936 | if (z <= fClusters[0]->GetZ()) return 0; | |
937 | if (z > fClusters[fN-1]->GetZ()) return fN; | |
938 | Int_t b=0, e=fN-1, m=(b+e)/2; | |
939 | for (; b<e; m=(b+e)/2) { | |
940 | if (z > fClusters[m]->GetZ()) b=m+1; | |
941 | else e=m; | |
942 | } | |
943 | return m; | |
944 | } | |
945 | ||
946 | void AliITStrackerV2::AliITSlayer:: | |
947 | SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) { | |
948 | //-------------------------------------------------------------------- | |
949 | // This function sets the "window" | |
950 | //-------------------------------------------------------------------- | |
951 | fI=FindClusterIndex(zmin); fZmax=zmax; | |
14825d5a | 952 | Double_t circle=2*TMath::Pi()*fR; |
953 | if (ymax>circle) { ymax-=circle; ymin-=circle; } | |
006b5f7f | 954 | fYmin=ymin; fYmax=ymax; |
955 | } | |
956 | ||
957 | const AliITSclusterV2 *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ | |
958 | //-------------------------------------------------------------------- | |
959 | // This function returns clusters within the "window" | |
960 | //-------------------------------------------------------------------- | |
961 | const AliITSclusterV2 *cluster=0; | |
962 | for (Int_t i=fI; i<fN; i++) { | |
963 | const AliITSclusterV2 *c=fClusters[i]; | |
964 | if (c->GetZ() > fZmax) break; | |
965 | if (c->IsUsed()) continue; | |
966 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); | |
967 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
968 | ||
969 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
970 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
971 | ||
972 | if (y<fYmin) continue; | |
973 | if (y>fYmax) continue; | |
974 | cluster=c; ci=i; | |
975 | fI=i+1; | |
976 | break; | |
977 | } | |
7f6ddf58 | 978 | |
006b5f7f | 979 | return cluster; |
980 | } | |
981 | ||
982 | Int_t AliITStrackerV2::AliITSlayer:: | |
983 | FindDetectorIndex(Double_t phi, Double_t z) const { | |
984 | //-------------------------------------------------------------------- | |
985 | //This function finds the detector crossed by the track | |
986 | //-------------------------------------------------------------------- | |
f363d377 | 987 | Double_t dphi=-(phi-fPhiOffset); |
006b5f7f | 988 | if (dphi < 0) dphi += 2*TMath::Pi(); |
989 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
990 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 991 | if (np>=fNladders) np-=fNladders; |
992 | if (np<0) np+=fNladders; | |
006b5f7f | 993 | |
994 | Double_t dz=fZOffset-z; | |
995 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 996 | if (nz>=fNdetectors) return -1; |
997 | if (nz<0) return -1; | |
006b5f7f | 998 | |
006b5f7f | 999 | return np*fNdetectors + nz; |
1000 | } | |
1001 | ||
1002 | Double_t | |
61ab8ea8 | 1003 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
1004 | const { | |
a9a2d814 | 1005 | //-------------------------------------------------------------------- |
1006 | //This function returns the layer thickness at this point (units X0) | |
1007 | //-------------------------------------------------------------------- | |
1008 | Double_t d=0.0085; | |
61ab8ea8 | 1009 | x0=21.82; |
a9a2d814 | 1010 | |
1011 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 1012 | Double_t dd=0.0034; |
1013 | d=dd; | |
1014 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1015 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
1016 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 1017 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 1018 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
1019 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1020 | d+=0.0034; | |
1021 | break; | |
1022 | } | |
1023 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
1024 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1025 | d+=0.0034; | |
1026 | break; | |
1027 | } | |
1028 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
1029 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 1030 | } |
1031 | } else | |
1032 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 1033 | Double_t dd=0.0034; |
1034 | d=dd; | |
1035 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1036 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
1037 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 1038 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 1039 | if (TMath::Abs(z-3.9*i)<0.15) { |
1040 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1041 | d+=dd; | |
1042 | break; | |
1043 | } | |
1044 | if (TMath::Abs(z+3.9*i)<0.15) { | |
1045 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
1046 | d+=dd; | |
1047 | break; | |
1048 | } | |
1049 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
1050 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 1051 | } |
1052 | } else | |
1053 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 1054 | Double_t dd=0.0033; |
1055 | d=dd; | |
1056 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1057 | ||
1058 | if (TMath::Abs(y-1.80)<0.55) { | |
1059 | d+=0.016; | |
1060 | for (Int_t j=0; j<20; j++) { | |
1061 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1062 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1063 | } | |
1064 | } | |
1065 | if (TMath::Abs(y+1.80)<0.55) { | |
1066 | d+=0.016; | |
1067 | for (Int_t j=0; j<20; j++) { | |
1068 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1069 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | for (Int_t i=0; i<4; i++) { | |
1074 | if (TMath::Abs(z-7.3*i)<0.60) { | |
1075 | d+=dd; | |
1076 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1077 | break; | |
1078 | } | |
1079 | if (TMath::Abs(z+7.3*i)<0.60) { | |
1080 | d+=dd; | |
1081 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
1082 | break; | |
1083 | } | |
a9a2d814 | 1084 | } |
1085 | } else | |
1086 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 1087 | Double_t dd=0.0063; x0=21.5; |
1088 | d=dd; | |
1089 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
1090 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
1091 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 1092 | } else |
1093 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 1094 | Double_t dd=0.0063; x0=21.5; |
1095 | d=dd; | |
1096 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
1097 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
1098 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 1099 | } |
1100 | ||
a9a2d814 | 1101 | return d; |
1102 | } | |
006b5f7f | 1103 | |
a9a2d814 | 1104 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 1105 | { |
1106 | //-------------------------------------------------------------------- | |
a9a2d814 | 1107 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 1108 | //-------------------------------------------------------------------- |
61ab8ea8 | 1109 | Double_t d=0.0028*3*3; //beam pipe |
1110 | Double_t x0=0; | |
006b5f7f | 1111 | |
18856a77 | 1112 | Double_t xn=fgLayers[fI].GetR(); |
006b5f7f | 1113 | for (Int_t i=0; i<fI; i++) { |
18856a77 | 1114 | Double_t xi=fgLayers[i].GetR(); |
1115 | d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi; | |
006b5f7f | 1116 | } |
1117 | ||
1118 | if (fI>1) { | |
61ab8ea8 | 1119 | Double_t xi=9.; |
1120 | d+=0.0097*xi*xi; | |
006b5f7f | 1121 | } |
1122 | ||
1123 | if (fI>3) { | |
18856a77 | 1124 | Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR()); |
61ab8ea8 | 1125 | d+=0.0034*xi*xi; |
006b5f7f | 1126 | } |
61ab8ea8 | 1127 | |
006b5f7f | 1128 | return d/(xn*xn); |
1129 | } | |
1130 | ||
006b5f7f | 1131 | Int_t AliITStrackerV2::AliITSlayer::InRoad() const { |
1132 | //-------------------------------------------------------------------- | |
1133 | // This function returns number of clusters within the "window" | |
1134 | //-------------------------------------------------------------------- | |
1135 | Int_t ncl=0; | |
1136 | for (Int_t i=fI; i<fN; i++) { | |
1137 | const AliITSclusterV2 *c=fClusters[i]; | |
1138 | if (c->GetZ() > fZmax) break; | |
a9a2d814 | 1139 | if (c->IsUsed()) continue; |
006b5f7f | 1140 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); |
1141 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
1142 | ||
1143 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
1144 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
1145 | ||
1146 | if (y<fYmin) continue; | |
1147 | if (y>fYmax) continue; | |
1148 | ncl++; | |
1149 | } | |
1150 | return ncl; | |
1151 | } | |
1152 | ||
880f41b9 | 1153 | Bool_t |
c630aafd | 1154 | AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,const AliITStrackV2 *c) { |
4ab260d6 | 1155 | //-------------------------------------------------------------------- |
c630aafd | 1156 | // This function refits the track "t" at the position "x" using |
1157 | // the clusters from "c" | |
4ab260d6 | 1158 | //-------------------------------------------------------------------- |
880f41b9 | 1159 | Int_t index[kMaxLayer]; |
1160 | Int_t k; | |
1161 | for (k=0; k<kMaxLayer; k++) index[k]=-1; | |
c630aafd | 1162 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 1163 | for (k=0; k<nc; k++) { |
c630aafd | 1164 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 1165 | index[nl]=idx; |
1166 | } | |
880f41b9 | 1167 | |
4ab260d6 | 1168 | Int_t from, to, step; |
ee34184f | 1169 | if (xx > t->GetX()) { |
4ab260d6 | 1170 | from=0; to=kMaxLayer; |
1171 | step=+1; | |
1172 | } else { | |
1173 | from=kMaxLayer-1; to=-1; | |
1174 | step=-1; | |
1175 | } | |
1176 | ||
1177 | for (Int_t i=from; i != to; i += step) { | |
18856a77 | 1178 | AliITSlayer &layer=fgLayers[i]; |
4ab260d6 | 1179 | Double_t r=layer.GetR(); |
1180 | ||
1181 | { | |
1182 | Double_t hI=i-0.5*step; | |
880f41b9 | 1183 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
18856a77 | 1184 | Double_t rs=0.5*(fgLayers[i-step].GetR() + r); |
61ab8ea8 | 1185 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1186 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1187 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1188 | return kFALSE; |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | ||
880f41b9 | 1193 | // remember old position [SR, GSI 18.02.2003] |
1194 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1195 | if (t->IsStartedTimeIntegral() && step==1) { | |
1196 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1197 | } | |
1198 | // | |
1199 | ||
4ab260d6 | 1200 | Double_t x,y,z; |
1201 | if (!t->GetGlobalXYZat(r,x,y,z)) { | |
1202 | return kFALSE; | |
1203 | } | |
1204 | Double_t phi=TMath::ATan2(y,x); | |
1205 | Int_t idet=layer.FindDetectorIndex(phi,z); | |
1206 | if (idet<0) { | |
1207 | return kFALSE; | |
1208 | } | |
1209 | const AliITSdetector &det=layer.GetDetector(idet); | |
1210 | phi=det.GetPhi(); | |
1211 | if (!t->Propagate(phi,det.GetR())) { | |
1212 | return kFALSE; | |
1213 | } | |
1214 | t->SetDetectorIndex(idet); | |
1215 | ||
1216 | const AliITSclusterV2 *cl=0; | |
1217 | Double_t maxchi2=kMaxChi2; | |
1218 | ||
1219 | Int_t idx=index[i]; | |
1220 | if (idx>0) { | |
1221 | const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx); | |
1222 | if (idet != c->GetDetectorIndex()) { | |
1223 | idet=c->GetDetectorIndex(); | |
1224 | const AliITSdetector &det=layer.GetDetector(idet); | |
1225 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1226 | return kFALSE; | |
1227 | } | |
1228 | t->SetDetectorIndex(idet); | |
1229 | } | |
1230 | Double_t chi2=t->GetPredictedChi2(c); | |
c630aafd | 1231 | if (chi2<maxchi2) { |
1232 | cl=c; | |
1233 | maxchi2=chi2; | |
1234 | } else { | |
1235 | return kFALSE; | |
1236 | } | |
4ab260d6 | 1237 | } |
4ab260d6 | 1238 | /* |
1239 | if (cl==0) | |
1240 | if (t->GetNumberOfClusters()>2) { | |
1241 | Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]); | |
1242 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]); | |
1243 | Double_t zmin=t->GetZ() - dz; | |
1244 | Double_t zmax=t->GetZ() + dz; | |
1245 | Double_t ymin=t->GetY() + phi*r - dy; | |
1246 | Double_t ymax=t->GetY() + phi*r + dy; | |
1247 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1248 | ||
1249 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
1250 | while ((c=layer.GetNextCluster(ci))!=0) { | |
1251 | if (idet != c->GetDetectorIndex()) continue; | |
1252 | Double_t chi2=t->GetPredictedChi2(c); | |
1253 | if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; } | |
1254 | } | |
1255 | } | |
1256 | */ | |
4ab260d6 | 1257 | if (cl) { |
1258 | if (!t->Update(cl,maxchi2,idx)) { | |
1259 | return kFALSE; | |
1260 | } | |
880f41b9 | 1261 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1262 | } |
1263 | ||
1264 | { | |
61ab8ea8 | 1265 | Double_t x0; |
1266 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1267 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1268 | } |
880f41b9 | 1269 | |
1270 | // track time update [SR, GSI 17.02.2003] | |
1271 | if (t->IsStartedTimeIntegral() && step==1) { | |
1272 | Double_t newX, newY, newZ; | |
1273 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1274 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1275 | (oldZ-newZ)*(oldZ-newZ); | |
1276 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1277 | } | |
1278 | // | |
4ab260d6 | 1279 | |
1280 | } | |
1281 | ||
ee34184f | 1282 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1283 | return kTRUE; |
1284 | } | |
1285 | ||
b87bd7cd | 1286 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1287 | //-------------------------------------------------------------------- | |
1288 | // This function marks clusters assigned to the track | |
1289 | //-------------------------------------------------------------------- | |
1290 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1291 | |
b87bd7cd | 1292 | AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0)); |
1293 | //if (c->GetQ()>2) c->Use(); | |
1294 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
1295 | c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1)); | |
1296 | //if (c->GetQ()>2) c->Use(); | |
1297 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
880f41b9 | 1298 | |
b87bd7cd | 1299 | } |