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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 | |
00a7cc50 | 18 | // It reads AliITSRecPoint clusters and creates AliITStrackV2 tracks |
18856a77 | 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 | |
9c369bfe | 24 | #include <new> |
25 | ||
75fb37cc | 26 | #include <TError.h> |
006b5f7f | 27 | #include <TFile.h> |
28 | #include <TTree.h> | |
29 | #include <TRandom.h> | |
a504d56f | 30 | #include <TGeoMatrix.h> |
006b5f7f | 31 | |
e341247d | 32 | #include "AliITSgeomTGeo.h" |
a504d56f | 33 | #include "AliAlignObj.h" |
006b5f7f | 34 | #include "AliITSRecPoint.h" |
c630aafd | 35 | #include "AliESD.h" |
00a7cc50 | 36 | #include "AliITSRecPoint.h" |
006b5f7f | 37 | #include "AliITStrackerV2.h" |
38 | ||
8676d691 | 39 | ClassImp(AliITStrackerV2) |
006b5f7f | 40 | |
a504d56f | 41 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; //ITS layers |
006b5f7f | 42 | |
6c94f330 | 43 | AliITStrackerV2::AliITStrackerV2(): |
44 | AliTracker(), | |
45 | fI(kMaxLayer), | |
46 | fBestTrack(), | |
47 | fTrackToFollow(), | |
48 | fPass(0), | |
49 | fLastLayerToTrackTo(kLastLayerToTrackTo) | |
50 | { | |
51 | //-------------------------------------------------------------------- | |
52 | //This is the AliITStrackerV2 default constructor | |
53 | //-------------------------------------------------------------------- | |
54 | ||
55 | for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer(); | |
56 | ||
57 | fConstraint[0]=1; fConstraint[1]=0; | |
58 | ||
59 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
60 | SetVertex(xyz,ers); | |
61 | ||
62 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
63 | ||
64 | } | |
65 | ||
66 | AliITStrackerV2::AliITStrackerV2(const AliITStrackerV2 &t): | |
67 | AliTracker(t), | |
68 | fI(t.fI), | |
69 | fBestTrack(t.fBestTrack), | |
70 | fTrackToFollow(t.fTrackToFollow), | |
71 | fPass(t.fPass), | |
72 | fLastLayerToTrackTo(t.fLastLayerToTrackTo) | |
73 | { | |
74 | //-------------------------------------------------------------------- | |
75 | //This is the AliITStrackerV2 copy constructor | |
76 | //-------------------------------------------------------------------- | |
77 | ||
78 | //for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer(); | |
79 | ||
80 | fConstraint[0]=t.fConstraint[0]; fConstraint[1]=t.fConstraint[1]; | |
81 | ||
82 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
83 | xyz[0]=t.GetX(); xyz[1]=t.GetY(); xyz[2]=t.GetZ(); | |
84 | ers[0]=t.GetSigmaX(); ers[1]=t.GetSigmaY(); ers[2]=t.GetSigmaZ(); | |
85 | SetVertex(xyz,ers); | |
86 | ||
87 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=t.fLayersNotToSkip[i]; | |
88 | ||
89 | } | |
90 | ||
1f3e997f | 91 | AliITStrackerV2::AliITStrackerV2(const Char_t *geom) : |
6c94f330 | 92 | AliTracker(), |
93 | fI(kMaxLayer), | |
94 | fBestTrack(), | |
95 | fTrackToFollow(), | |
96 | fPass(0), | |
97 | fLastLayerToTrackTo(kLastLayerToTrackTo) | |
98 | { | |
006b5f7f | 99 | //-------------------------------------------------------------------- |
61ab8ea8 | 100 | //This is the AliITStrackerV2 constructor |
006b5f7f | 101 | //-------------------------------------------------------------------- |
e341247d | 102 | if (geom) { |
103 | AliWarning("\"geom\" is actually a dummy argument !"); | |
104 | } | |
006b5f7f | 105 | |
e341247d | 106 | for (Int_t i=1; i<kMaxLayer+1; i++) { |
107 | Int_t nlad=AliITSgeomTGeo::GetNLadders(i); | |
108 | Int_t ndet=AliITSgeomTGeo::GetNDetectors(i); | |
006b5f7f | 109 | |
e341247d | 110 | Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2]; |
111 | AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz); | |
006b5f7f | 112 | Double_t poff=TMath::ATan2(y,x); |
113 | Double_t zoff=z; | |
a504d56f | 114 | Double_t r=TMath::Sqrt(x*x + y*y); |
006b5f7f | 115 | |
e341247d | 116 | AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz); |
006b5f7f | 117 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 118 | AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz); |
006b5f7f | 119 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 120 | AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz); |
006b5f7f | 121 | r += TMath::Sqrt(x*x + y*y); |
122 | r*=0.25; | |
123 | ||
18856a77 | 124 | new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); |
006b5f7f | 125 | |
126 | for (Int_t j=1; j<nlad+1; j++) { | |
127 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
e341247d | 128 | TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m); |
1f3e997f | 129 | const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k); |
130 | m.Multiply(tm); | |
131 | Double_t txyz[3]={0.}, xyz[3]={0.}; | |
132 | m.LocalToMaster(txyz,xyz); | |
133 | Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); | |
134 | Double_t phi=TMath::ATan2(xyz[1],xyz[0]); | |
c219fd63 | 135 | |
136 | if (phi<0) phi+=TMath::TwoPi(); | |
137 | else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi(); | |
138 | ||
18856a77 | 139 | AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1); |
006b5f7f | 140 | new(&det) AliITSdetector(r,phi); |
141 | } | |
142 | } | |
c630aafd | 143 | |
006b5f7f | 144 | } |
145 | ||
c219fd63 | 146 | fConstraint[0]=1; fConstraint[1]=0; |
8676d691 | 147 | |
148 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
149 | SetVertex(xyz,ers); | |
c0dd5278 | 150 | |
151 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
c0dd5278 | 152 | |
153 | } | |
154 | ||
155 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
156 | //-------------------------------------------------------------------- | |
157 | //This function set masks of the layers which must be not skipped | |
158 | //-------------------------------------------------------------------- | |
159 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i]; | |
61ab8ea8 | 160 | } |
006b5f7f | 161 | |
c630aafd | 162 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 163 | //-------------------------------------------------------------------- |
164 | //This function loads ITS clusters | |
165 | //-------------------------------------------------------------------- | |
00a7cc50 | 166 | TBranch *branch=cTree->GetBranch("ITSRecPoints"); |
61ab8ea8 | 167 | if (!branch) { |
c630aafd | 168 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 169 | return 1; |
61ab8ea8 | 170 | } |
006b5f7f | 171 | |
00a7cc50 | 172 | TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy; |
61ab8ea8 | 173 | branch->SetAddress(&clusters); |
006b5f7f | 174 | |
61ab8ea8 | 175 | Int_t j=0; |
176 | for (Int_t i=0; i<kMaxLayer; i++) { | |
18856a77 | 177 | Int_t ndet=fgLayers[i].GetNdetectors(); |
178 | Int_t jmax = j + fgLayers[i].GetNladders()*ndet; | |
c219fd63 | 179 | |
180 | Double_t r=fgLayers[i].GetR(); | |
181 | Double_t circ=TMath::TwoPi()*r; | |
182 | ||
61ab8ea8 | 183 | for (; j<jmax; j++) { |
184 | if (!cTree->GetEvent(j)) continue; | |
185 | Int_t ncl=clusters->GetEntriesFast(); | |
1f3e997f | 186 | |
61ab8ea8 | 187 | while (ncl--) { |
00a7cc50 | 188 | AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl); |
c219fd63 | 189 | |
75fb37cc | 190 | if (!c->Misalign()) AliWarning("Can't misalign this cluster !"); |
1f3e997f | 191 | |
c219fd63 | 192 | Int_t idx=c->GetDetectorIndex(); |
a504d56f | 193 | AliITSdetector &det=fgLayers[i].GetDetector(idx); |
194 | ||
a504d56f | 195 | Double_t y=r*det.GetPhi()+c->GetY(); |
c219fd63 | 196 | if (y>circ) y-=circ; else if (y<0) y+=circ; |
197 | c->SetPhiR(y); | |
198 | ||
00a7cc50 | 199 | fgLayers[i].InsertCluster(new AliITSRecPoint(*c)); |
61ab8ea8 | 200 | } |
201 | clusters->Delete(); | |
202 | } | |
18856a77 | 203 | fgLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 204 | } |
c630aafd | 205 | |
8676d691 | 206 | return 0; |
61ab8ea8 | 207 | } |
006b5f7f | 208 | |
61ab8ea8 | 209 | void AliITStrackerV2::UnloadClusters() { |
210 | //-------------------------------------------------------------------- | |
211 | //This function unloads ITS clusters | |
212 | //-------------------------------------------------------------------- | |
18856a77 | 213 | for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters(); |
006b5f7f | 214 | } |
215 | ||
880f41b9 | 216 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
217 | //-------------------------------------------------------------------- | |
218 | // Correction for the material between the TPC and the ITS | |
219 | // (should it belong to the TPC code ?) | |
220 | //-------------------------------------------------------------------- | |
221 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
222 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
223 | Double_t yr=12.8, dr=0.03; // rods ? | |
224 | Double_t zm=0.2, dm=0.40; // membrane | |
225 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
226 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
227 | ||
228 | if (t->GetX() > riw) { | |
229 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
230 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
231 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
232 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
233 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
234 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
235 | if (!t->PropagateTo(rs,ds)) return 1; | |
236 | } else if (t->GetX() < rs) { | |
237 | if (!t->PropagateTo(rs,-ds)) return 1; | |
238 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
239 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
240 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
ba1a3e1a | 241 | if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1; |
880f41b9 | 242 | } else { |
243 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
244 | return 1; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
c630aafd | 250 | Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) { |
006b5f7f | 251 | //-------------------------------------------------------------------- |
c630aafd | 252 | // This functions reconstructs ITS tracks |
253 | // The clusters must be already loaded ! | |
006b5f7f | 254 | //-------------------------------------------------------------------- |
c630aafd | 255 | TObjArray itsTracks(15000); |
006b5f7f | 256 | |
c630aafd | 257 | {/* Read ESD tracks */ |
258 | Int_t nentr=event->GetNumberOfTracks(); | |
259 | Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr); | |
260 | while (nentr--) { | |
261 | AliESDtrack *esd=event->GetTrack(nentr); | |
262 | ||
ba1a3e1a | 263 | if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue; |
264 | if (esd->GetStatus()&AliESDtrack::kTPCout) continue; | |
265 | if (esd->GetStatus()&AliESDtrack::kITSin) continue; | |
c630aafd | 266 | |
267 | AliITStrackV2 *t=0; | |
268 | try { | |
269 | t=new AliITStrackV2(*esd); | |
270 | } catch (const Char_t *msg) { | |
271 | Warning("Clusters2Tracks",msg); | |
272 | delete t; | |
273 | continue; | |
274 | } | |
6c94f330 | 275 | if (TMath::Abs(t->GetD(GetX(),GetY()))>4) { |
ebd8369c | 276 | delete t; |
277 | continue; | |
278 | } | |
006b5f7f | 279 | |
c630aafd | 280 | if (CorrectForDeadZoneMaterial(t)!=0) { |
281 | Warning("Clusters2Tracks", | |
282 | "failed to correct for the material in the dead zone !\n"); | |
283 | delete t; | |
284 | continue; | |
285 | } | |
286 | itsTracks.AddLast(t); | |
287 | } | |
288 | } /* End Read ESD tracks */ | |
289 | ||
290 | itsTracks.Sort(); | |
291 | Int_t nentr=itsTracks.GetEntriesFast(); | |
15dd636f | 292 | |
c630aafd | 293 | Int_t ntrk=0; |
294 | for (fPass=0; fPass<2; fPass++) { | |
295 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
296 | for (Int_t i=0; i<nentr; i++) { | |
297 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
15dd636f | 298 | if (t==0) continue; //this track has been already tracked |
c630aafd | 299 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label |
300 | ||
301 | ResetTrackToFollow(*t); | |
302 | ResetBestTrack(); | |
303 | ||
304 | for (FollowProlongation(); fI<kMaxLayer; fI++) { | |
15dd636f | 305 | while (TakeNextProlongation()) FollowProlongation(); |
c630aafd | 306 | } |
307 | ||
de5d3595 | 308 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
15dd636f | 309 | |
c630aafd | 310 | if (fConstraint[fPass]) { |
15dd636f | 311 | ResetTrackToFollow(*t); |
312 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
313 | ResetBestTrack(); | |
314 | } | |
315 | ||
c630aafd | 316 | fBestTrack.SetLabel(tpcLabel); |
317 | fBestTrack.CookdEdx(); | |
318 | CookLabel(&fBestTrack,0.); //For comparison only | |
319 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
15dd636f | 320 | UseClusters(&fBestTrack); |
c630aafd | 321 | delete itsTracks.RemoveAt(i); |
322 | ntrk++; | |
323 | } | |
324 | } | |
babd135a | 325 | |
c630aafd | 326 | itsTracks.Delete(); |
2257f27e | 327 | |
c630aafd | 328 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
c630aafd | 333 | Int_t AliITStrackerV2::PropagateBack(AliESD *event) { |
334 | //-------------------------------------------------------------------- | |
335 | // This functions propagates reconstructed ITS tracks back | |
336 | // The clusters must be loaded ! | |
337 | //-------------------------------------------------------------------- | |
338 | Int_t nentr=event->GetNumberOfTracks(); | |
339 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
340 | ||
341 | Int_t ntrk=0; | |
342 | for (Int_t i=0; i<nentr; i++) { | |
343 | AliESDtrack *esd=event->GetTrack(i); | |
344 | ||
ba1a3e1a | 345 | if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue; |
346 | if (esd->GetStatus()&AliESDtrack::kITSout) continue; | |
c630aafd | 347 | |
348 | AliITStrackV2 *t=0; | |
349 | try { | |
350 | t=new AliITStrackV2(*esd); | |
351 | } catch (const Char_t *msg) { | |
352 | Warning("PropagateBack",msg); | |
353 | delete t; | |
354 | continue; | |
355 | } | |
356 | ||
357 | ResetTrackToFollow(*t); | |
358 | ||
359 | // propagete to vertex [SR, GSI 17.02.2003] | |
a9459f9c | 360 | // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov |
361 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) { | |
6c94f330 | 362 | if (fTrackToFollow.PropagateToVertex(event->GetVertex())) { |
a9459f9c | 363 | fTrackToFollow.StartTimeIntegral(); |
364 | } | |
365 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
366 | } | |
c630aafd | 367 | |
6c94f330 | 368 | fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters(); |
c630aafd | 369 | if (RefitAt(49.,&fTrackToFollow,t)) { |
370 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
371 | Warning("PropagateBack", | |
372 | "failed to correct for the material in the dead zone !\n"); | |
373 | delete t; | |
374 | continue; | |
375 | } | |
376 | fTrackToFollow.SetLabel(t->GetLabel()); | |
ba1a3e1a | 377 | //fTrackToFollow.CookdEdx(); |
c630aafd | 378 | CookLabel(&fTrackToFollow,0.); //For comparison only |
379 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
15dd636f | 380 | UseClusters(&fTrackToFollow); |
c630aafd | 381 | ntrk++; |
382 | } | |
383 | delete t; | |
384 | } | |
385 | ||
386 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 387 | |
83d73500 | 388 | return 0; |
389 | } | |
390 | ||
c630aafd | 391 | Int_t AliITStrackerV2::RefitInward(AliESD *event) { |
83d73500 | 392 | //-------------------------------------------------------------------- |
393 | // This functions refits ITS tracks using the | |
394 | // "inward propagated" TPC tracks | |
c630aafd | 395 | // The clusters must be loaded ! |
83d73500 | 396 | //-------------------------------------------------------------------- |
c630aafd | 397 | Int_t nentr=event->GetNumberOfTracks(); |
398 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
399 | ||
400 | Int_t ntrk=0; | |
401 | for (Int_t i=0; i<nentr; i++) { | |
402 | AliESDtrack *esd=event->GetTrack(i); | |
403 | ||
ba1a3e1a | 404 | if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue; |
405 | if (esd->GetStatus()&AliESDtrack::kITSrefit) continue; | |
406 | if (esd->GetStatus()&AliESDtrack::kTPCout) | |
15dd636f | 407 | if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue; |
c630aafd | 408 | |
409 | AliITStrackV2 *t=0; | |
410 | try { | |
411 | t=new AliITStrackV2(*esd); | |
412 | } catch (const Char_t *msg) { | |
413 | Warning("RefitInward",msg); | |
414 | delete t; | |
415 | continue; | |
416 | } | |
417 | ||
418 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
419 | Warning("RefitInward", | |
420 | "failed to correct for the material in the dead zone !\n"); | |
421 | delete t; | |
422 | continue; | |
423 | } | |
424 | ||
425 | ResetTrackToFollow(*t); | |
426 | fTrackToFollow.ResetClusters(); | |
427 | ||
428 | //Refitting... | |
ef7253ac | 429 | if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) { |
c630aafd | 430 | fTrackToFollow.SetLabel(t->GetLabel()); |
431 | fTrackToFollow.CookdEdx(); | |
15dd636f | 432 | CookLabel(&fTrackToFollow,0.); //For comparison only |
18856a77 | 433 | |
49d13e89 | 434 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe |
435 | AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack(); | |
436 | esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); | |
437 | Float_t r[3]={0.,0.,0.}; | |
438 | Double_t maxD=3.; | |
439 | esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD); | |
440 | ntrk++; | |
67c3dcbe | 441 | } |
c630aafd | 442 | } |
443 | delete t; | |
444 | } | |
445 | ||
446 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 447 | |
c630aafd | 448 | return 0; |
449 | } | |
83d73500 | 450 | |
006b5f7f | 451 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { |
452 | //-------------------------------------------------------------------- | |
453 | // Return pointer to a given cluster | |
454 | //-------------------------------------------------------------------- | |
455 | Int_t l=(index & 0xf0000000) >> 28; | |
456 | Int_t c=(index & 0x0fffffff) >> 00; | |
18856a77 | 457 | return fgLayers[l].GetCluster(c); |
006b5f7f | 458 | } |
459 | ||
460 | ||
461 | void AliITStrackerV2::FollowProlongation() { | |
462 | //-------------------------------------------------------------------- | |
463 | //This function finds a track prolongation | |
464 | //-------------------------------------------------------------------- | |
c0dd5278 | 465 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 466 | Int_t i=fI-1; |
8676d691 | 467 | |
18856a77 | 468 | AliITSlayer &layer=fgLayers[i]; |
a9a2d814 | 469 | AliITStrackV2 &track=fTracks[i]; |
006b5f7f | 470 | |
14825d5a | 471 | Double_t r=layer.GetR(); |
61ab8ea8 | 472 | |
a9a2d814 | 473 | if (i==3 || i==1) { |
18856a77 | 474 | Double_t rs=0.5*(fgLayers[i+1].GetR() + r); |
61ab8ea8 | 475 | Double_t d=0.0034, x0=38.6; |
476 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
477 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 478 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 479 | return; |
a9a2d814 | 480 | } |
006b5f7f | 481 | } |
482 | ||
483 | //find intersection | |
484 | Double_t x,y,z; | |
14825d5a | 485 | if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) { |
8676d691 | 486 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 487 | return; |
006b5f7f | 488 | } |
489 | Double_t phi=TMath::ATan2(y,x); | |
f363d377 | 490 | |
006b5f7f | 491 | Int_t idet=layer.FindDetectorIndex(phi,z); |
492 | if (idet<0) { | |
8676d691 | 493 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 494 | return; |
006b5f7f | 495 | } |
496 | ||
497 | //propagate to the intersection | |
498 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 499 | phi=det.GetPhi(); |
a9a2d814 | 500 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 501 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 502 | return; |
006b5f7f | 503 | } |
504 | fTrackToFollow.SetDetectorIndex(idet); | |
505 | ||
506 | //Select possible prolongations and store the current track estimation | |
507 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
8676d691 | 508 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); |
509 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); | |
510 | Double_t road=layer.GetRoad(); | |
511 | if (dz*dy>road*road) { | |
512 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
513 | dz=road*scz; dy=road*scy; | |
514 | } | |
b87bd7cd | 515 | |
516 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); | |
14825d5a | 517 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
7f6ddf58 | 518 | if (dz > kMaxRoad) { |
8676d691 | 519 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 520 | return; |
006b5f7f | 521 | } |
a9a2d814 | 522 | |
15dd636f | 523 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 524 | |
b87bd7cd | 525 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); |
14825d5a | 526 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
7f6ddf58 | 527 | if (dy > kMaxRoad) { |
8676d691 | 528 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 529 | return; |
006b5f7f | 530 | } |
a9a2d814 | 531 | |
c219fd63 | 532 | fI--; |
533 | ||
7f6ddf58 | 534 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 535 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 536 | Double_t ymin=track.GetY() + r*phi - dy; |
537 | Double_t ymax=track.GetY() + r*phi + dy; | |
c219fd63 | 538 | if (layer.SelectClusters(zmin,zmax,ymin,ymax)==0) |
539 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 540 | |
15dd636f | 541 | if (!TakeNextProlongation()) |
542 | if (fLayersNotToSkip[fI]) return; | |
543 | ||
006b5f7f | 544 | } |
545 | ||
546 | //deal with the best track | |
547 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
548 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
15dd636f | 549 | if (ncl) |
550 | if (ncl >= nclb) { | |
551 | Double_t chi2=fTrackToFollow.GetChi2(); | |
552 | if (chi2/ncl < kChi2PerCluster) { | |
553 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { | |
554 | ResetBestTrack(); | |
006b5f7f | 555 | } |
15dd636f | 556 | } |
006b5f7f | 557 | } |
15dd636f | 558 | |
006b5f7f | 559 | } |
560 | ||
006b5f7f | 561 | Int_t AliITStrackerV2::TakeNextProlongation() { |
562 | //-------------------------------------------------------------------- | |
a9a2d814 | 563 | // This function takes another track prolongation |
564 | // | |
565 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 566 | //-------------------------------------------------------------------- |
18856a77 | 567 | AliITSlayer &layer=fgLayers[fI]; |
4ab260d6 | 568 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 569 | |
b87bd7cd | 570 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]); |
571 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]); | |
8676d691 | 572 | Double_t road=layer.GetRoad(); |
573 | if (dz*dy>road*road) { | |
574 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
575 | dz=road*scz; dy=road*scy; | |
576 | } | |
006b5f7f | 577 | |
00a7cc50 | 578 | const AliITSRecPoint *c=0; Int_t ci=-1; |
579 | const AliITSRecPoint *cc=0; Int_t cci=-1; | |
c219fd63 | 580 | Double_t chi2=kMaxChi2; |
006b5f7f | 581 | while ((c=layer.GetNextCluster(ci))!=0) { |
006b5f7f | 582 | Int_t idet=c->GetDetectorIndex(); |
15dd636f | 583 | |
4ab260d6 | 584 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 585 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 586 | ResetTrackToFollow(fTracks[fI]); |
587 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 588 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 589 | continue; |
590 | } | |
4ab260d6 | 591 | fTrackToFollow.SetDetectorIndex(idet); |
592 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 593 | } |
594 | ||
4ab260d6 | 595 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
596 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 597 | |
c219fd63 | 598 | Double_t ch2=fTrackToFollow.GetPredictedChi2(c); |
599 | if (ch2 > chi2) continue; | |
600 | chi2=ch2; | |
601 | cc=c; cci=ci; | |
602 | break; | |
006b5f7f | 603 | } |
604 | ||
c219fd63 | 605 | if (!cc) return 0; |
006b5f7f | 606 | |
1f3e997f | 607 | {// Take into account the mis-alignment |
608 | Double_t x = fTrackToFollow.GetX() + cc->GetX(); | |
609 | if (!fTrackToFollow.PropagateTo(x,0.,0.)) return 0; | |
610 | } | |
c219fd63 | 611 | if (!fTrackToFollow.Update(cc,chi2,(fI<<28)+cci)) { |
8676d691 | 612 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 613 | return 0; |
614 | } | |
15dd636f | 615 | |
4ab260d6 | 616 | if (fTrackToFollow.GetNumberOfClusters()>1) |
6c94f330 | 617 | if (TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()))>4) return 0; |
4ab260d6 | 618 | |
a9a2d814 | 619 | fTrackToFollow. |
c219fd63 | 620 | SetSampledEdx(cc->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. |
a9a2d814 | 621 | |
622 | { | |
880f41b9 | 623 | Double_t x0; |
61ab8ea8 | 624 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 625 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 626 | } |
4ab260d6 | 627 | |
a9a2d814 | 628 | if (fConstraint[fPass]) { |
4ab260d6 | 629 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 630 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
631 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
632 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 633 | } |
006b5f7f | 634 | |
006b5f7f | 635 | return 1; |
636 | } | |
637 | ||
638 | ||
6c94f330 | 639 | AliITStrackerV2::AliITSlayer::AliITSlayer(): |
640 | fR(0.), | |
641 | fPhiOffset(0.), | |
642 | fNladders(0), | |
643 | fZOffset(0.), | |
644 | fNdetectors(0), | |
645 | fDetectors(0), | |
646 | fNsel(0), | |
647 | fRoad(2*fR*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
648 | { | |
006b5f7f | 649 | //-------------------------------------------------------------------- |
650 | //default AliITSlayer constructor | |
651 | //-------------------------------------------------------------------- | |
c219fd63 | 652 | |
653 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; | |
c219fd63 | 654 | |
006b5f7f | 655 | } |
656 | ||
657 | AliITStrackerV2::AliITSlayer:: | |
6c94f330 | 658 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd): |
659 | fR(r), | |
660 | fPhiOffset(p), | |
661 | fNladders(nl), | |
662 | fZOffset(z), | |
663 | fNdetectors(nd), | |
664 | fDetectors(new AliITSdetector[nl*nd]), | |
665 | fNsel(0), | |
666 | fRoad(2*r*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
667 | { | |
006b5f7f | 668 | //-------------------------------------------------------------------- |
669 | //main AliITSlayer constructor | |
670 | //-------------------------------------------------------------------- | |
006b5f7f | 671 | |
c219fd63 | 672 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; |
c219fd63 | 673 | |
674 | for (Int_t i=0; i<kMaxClusterPerLayer; i++) fClusters[i]=0; | |
b87bd7cd | 675 | |
006b5f7f | 676 | } |
677 | ||
678 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
679 | //-------------------------------------------------------------------- | |
680 | // AliITSlayer destructor | |
681 | //-------------------------------------------------------------------- | |
682 | delete[] fDetectors; | |
c219fd63 | 683 | ResetClusters(); |
006b5f7f | 684 | } |
685 | ||
61ab8ea8 | 686 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
687 | //-------------------------------------------------------------------- | |
688 | // This function removes loaded clusters | |
689 | //-------------------------------------------------------------------- | |
c219fd63 | 690 | for (Int_t s=0; s<kNsector; s++) { |
691 | Int_t &n=fN[s]; | |
692 | while (n) { | |
693 | n--; | |
694 | delete fClusters[s*kMaxClusterPerSector+n]; | |
695 | } | |
696 | } | |
61ab8ea8 | 697 | } |
698 | ||
b87bd7cd | 699 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
700 | //-------------------------------------------------------------------- | |
701 | // This function calculates the road defined by the cluster density | |
702 | //-------------------------------------------------------------------- | |
703 | Int_t n=0; | |
c219fd63 | 704 | for (Int_t s=0; s<kNsector; s++) { |
705 | Int_t i=fN[s]; | |
706 | while (i--) | |
707 | if (TMath::Abs(fClusters[s*kMaxClusterPerSector+i]->GetZ())<fR) n++; | |
b87bd7cd | 708 | } |
709 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
710 | } | |
711 | ||
00a7cc50 | 712 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSRecPoint *c) { |
006b5f7f | 713 | //-------------------------------------------------------------------- |
c219fd63 | 714 | // This function inserts a cluster to this layer in increasing |
715 | // order of the cluster's fZ | |
006b5f7f | 716 | //-------------------------------------------------------------------- |
c219fd63 | 717 | Float_t circ=TMath::TwoPi()*fR; |
718 | Int_t sec=Int_t(kNsector*c->GetPhiR()/circ); | |
81e97e0d | 719 | if (sec>=kNsector) { |
720 | ::Error("InsertCluster","Wrong sector !\n"); | |
721 | return 1; | |
722 | } | |
c219fd63 | 723 | Int_t &n=fN[sec]; |
724 | if (n>=kMaxClusterPerSector) { | |
725 | ::Error("InsertCluster","Too many clusters !\n"); | |
726 | return 1; | |
006b5f7f | 727 | } |
c219fd63 | 728 | if (n==0) fClusters[sec*kMaxClusterPerSector]=c; |
729 | else { | |
730 | Int_t i=FindClusterIndex(c->GetZ(),sec); | |
731 | Int_t k=n-i+sec*kMaxClusterPerSector; | |
00a7cc50 | 732 | memmove(fClusters+i+1 ,fClusters+i,k*sizeof(AliITSRecPoint*)); |
c219fd63 | 733 | fClusters[i]=c; |
734 | } | |
735 | n++; | |
006b5f7f | 736 | return 0; |
737 | } | |
738 | ||
c219fd63 | 739 | Int_t |
740 | AliITStrackerV2::AliITSlayer::FindClusterIndex(Float_t z,Int_t s) const { | |
006b5f7f | 741 | //-------------------------------------------------------------------- |
c219fd63 | 742 | // For the sector "s", this function returns the index of the first |
743 | // with its fZ >= "z". | |
006b5f7f | 744 | //-------------------------------------------------------------------- |
c219fd63 | 745 | Int_t nc=fN[s]; |
746 | if (nc==0) return kMaxClusterPerSector*s; | |
747 | ||
748 | Int_t b=kMaxClusterPerSector*s; | |
749 | if (z <= fClusters[b]->GetZ()) return b; | |
750 | ||
751 | Int_t e=b+nc-1; | |
752 | if (z > fClusters[e]->GetZ()) return e+1; | |
753 | ||
754 | Int_t m=(b+e)/2; | |
006b5f7f | 755 | for (; b<e; m=(b+e)/2) { |
756 | if (z > fClusters[m]->GetZ()) b=m+1; | |
757 | else e=m; | |
758 | } | |
759 | return m; | |
760 | } | |
761 | ||
c219fd63 | 762 | Int_t AliITStrackerV2::AliITSlayer:: |
763 | SelectClusters(Float_t zmin,Float_t zmax,Float_t ymin, Float_t ymax) { | |
006b5f7f | 764 | //-------------------------------------------------------------------- |
c219fd63 | 765 | // This function selects clusters within the "window" |
006b5f7f | 766 | //-------------------------------------------------------------------- |
c219fd63 | 767 | Float_t circ=fR*TMath::TwoPi(); |
768 | ||
769 | if (ymin>circ) ymin-=circ; else if (ymin<0) ymin+=circ; | |
770 | if (ymax>circ) ymax-=circ; else if (ymax<0) ymax+=circ; | |
771 | ||
521f4796 | 772 | Int_t i1=Int_t(kNsector*ymin/circ); if (i1==kNsector) i1--; |
c219fd63 | 773 | if (fN[i1]!=0) { |
774 | Float_t ym = (ymax<ymin) ? ymax+circ : ymax; | |
775 | Int_t i=FindClusterIndex(zmin,i1), imax=i1*kMaxClusterPerSector+fN[i1]; | |
776 | for (; i<imax; i++) { | |
00a7cc50 | 777 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 778 | if (c->IsUsed()) continue; |
779 | if (c->GetZ()>zmax) break; | |
780 | if (c->GetPhiR()<=ymin) continue; | |
781 | if (c->GetPhiR()>ym) continue; | |
782 | fIndex[fNsel++]=i; | |
783 | } | |
784 | } | |
785 | ||
521f4796 | 786 | Int_t i2=Int_t(kNsector*ymax/circ); if (i2==kNsector) i2--; |
c219fd63 | 787 | if (i2==i1) return fNsel; |
788 | ||
789 | if (fN[i2]!=0) { | |
790 | Float_t ym = (ymin>ymax) ? ymin-circ : ymin; | |
791 | Int_t i=FindClusterIndex(zmin,i2), imax=i2*kMaxClusterPerSector+fN[i2]; | |
792 | for (; i<imax; i++) { | |
00a7cc50 | 793 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 794 | if (c->IsUsed()) continue; |
795 | if (c->GetZ()>zmax) break; | |
796 | if (c->GetPhiR()<=ym) continue; | |
797 | if (c->GetPhiR()>ymax) continue; | |
798 | fIndex[fNsel++]=i; | |
799 | } | |
800 | } | |
801 | ||
802 | return fNsel; | |
006b5f7f | 803 | } |
804 | ||
00a7cc50 | 805 | const AliITSRecPoint *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ |
006b5f7f | 806 | //-------------------------------------------------------------------- |
807 | // This function returns clusters within the "window" | |
808 | //-------------------------------------------------------------------- | |
00a7cc50 | 809 | AliITSRecPoint *c=0; |
c219fd63 | 810 | ci=-1; |
811 | if (fNsel) { | |
812 | fNsel--; | |
813 | ci=fIndex[fNsel]; | |
814 | c=fClusters[ci]; | |
006b5f7f | 815 | } |
c219fd63 | 816 | return c; |
817 | } | |
7f6ddf58 | 818 | |
c219fd63 | 819 | Int_t AliITStrackerV2::AliITSlayer::GetNumberOfClusters() const { |
820 | Int_t n=0; | |
821 | for (Int_t s=0; s<kNsector; s++) n+=fN[s]; | |
822 | return n; | |
006b5f7f | 823 | } |
824 | ||
c219fd63 | 825 | Int_t |
826 | AliITStrackerV2::AliITSlayer::FindDetectorIndex(Double_t phi,Double_t z)const { | |
006b5f7f | 827 | //-------------------------------------------------------------------- |
828 | //This function finds the detector crossed by the track | |
829 | //-------------------------------------------------------------------- | |
31fb8575 | 830 | Double_t dphi; |
831 | if (fZOffset<0) // old geometry | |
832 | dphi = -(phi-fPhiOffset); | |
833 | else // new geometry | |
834 | dphi = phi-fPhiOffset; | |
835 | ||
006b5f7f | 836 | if (dphi < 0) dphi += 2*TMath::Pi(); |
837 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
838 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 839 | if (np>=fNladders) np-=fNladders; |
840 | if (np<0) np+=fNladders; | |
006b5f7f | 841 | |
842 | Double_t dz=fZOffset-z; | |
843 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 844 | if (nz>=fNdetectors) return -1; |
845 | if (nz<0) return -1; | |
006b5f7f | 846 | |
006b5f7f | 847 | return np*fNdetectors + nz; |
848 | } | |
849 | ||
850 | Double_t | |
61ab8ea8 | 851 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
852 | const { | |
a9a2d814 | 853 | //-------------------------------------------------------------------- |
854 | //This function returns the layer thickness at this point (units X0) | |
855 | //-------------------------------------------------------------------- | |
856 | Double_t d=0.0085; | |
61ab8ea8 | 857 | x0=21.82; |
a9a2d814 | 858 | |
859 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 860 | Double_t dd=0.0034; |
861 | d=dd; | |
862 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
863 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
864 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 865 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 866 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
867 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
868 | d+=0.0034; | |
869 | break; | |
870 | } | |
871 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
872 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
873 | d+=0.0034; | |
874 | break; | |
875 | } | |
876 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
877 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 878 | } |
879 | } else | |
880 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 881 | Double_t dd=0.0034; |
882 | d=dd; | |
883 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
884 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
885 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 886 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 887 | if (TMath::Abs(z-3.9*i)<0.15) { |
888 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
889 | d+=dd; | |
890 | break; | |
891 | } | |
892 | if (TMath::Abs(z+3.9*i)<0.15) { | |
893 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
894 | d+=dd; | |
895 | break; | |
896 | } | |
897 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
898 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 899 | } |
900 | } else | |
901 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 902 | Double_t dd=0.0033; |
903 | d=dd; | |
904 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
905 | ||
906 | if (TMath::Abs(y-1.80)<0.55) { | |
907 | d+=0.016; | |
908 | for (Int_t j=0; j<20; j++) { | |
909 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
910 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
911 | } | |
912 | } | |
913 | if (TMath::Abs(y+1.80)<0.55) { | |
914 | d+=0.016; | |
915 | for (Int_t j=0; j<20; j++) { | |
916 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
917 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
918 | } | |
919 | } | |
920 | ||
921 | for (Int_t i=0; i<4; i++) { | |
922 | if (TMath::Abs(z-7.3*i)<0.60) { | |
923 | d+=dd; | |
924 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
925 | break; | |
926 | } | |
927 | if (TMath::Abs(z+7.3*i)<0.60) { | |
928 | d+=dd; | |
929 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
930 | break; | |
931 | } | |
a9a2d814 | 932 | } |
933 | } else | |
934 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 935 | Double_t dd=0.0063; x0=21.5; |
936 | d=dd; | |
937 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
938 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
939 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 940 | } else |
941 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 942 | Double_t dd=0.0063; x0=21.5; |
943 | d=dd; | |
944 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
945 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
946 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 947 | } |
948 | ||
a9a2d814 | 949 | return d; |
950 | } | |
006b5f7f | 951 | |
a9a2d814 | 952 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 953 | { |
954 | //-------------------------------------------------------------------- | |
a9a2d814 | 955 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 956 | //-------------------------------------------------------------------- |
61ab8ea8 | 957 | Double_t d=0.0028*3*3; //beam pipe |
958 | Double_t x0=0; | |
006b5f7f | 959 | |
18856a77 | 960 | Double_t xn=fgLayers[fI].GetR(); |
006b5f7f | 961 | for (Int_t i=0; i<fI; i++) { |
18856a77 | 962 | Double_t xi=fgLayers[i].GetR(); |
963 | d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi; | |
006b5f7f | 964 | } |
965 | ||
966 | if (fI>1) { | |
61ab8ea8 | 967 | Double_t xi=9.; |
968 | d+=0.0097*xi*xi; | |
006b5f7f | 969 | } |
970 | ||
971 | if (fI>3) { | |
18856a77 | 972 | Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR()); |
61ab8ea8 | 973 | d+=0.0034*xi*xi; |
006b5f7f | 974 | } |
61ab8ea8 | 975 | |
006b5f7f | 976 | return d/(xn*xn); |
977 | } | |
978 | ||
ef7253ac | 979 | Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t, |
980 | const AliITStrackV2 *c, Bool_t extra) { | |
4ab260d6 | 981 | //-------------------------------------------------------------------- |
c630aafd | 982 | // This function refits the track "t" at the position "x" using |
983 | // the clusters from "c" | |
ef7253ac | 984 | // If "extra"==kTRUE, |
985 | // the clusters from overlapped modules get attached to "t" | |
4ab260d6 | 986 | //-------------------------------------------------------------------- |
880f41b9 | 987 | Int_t index[kMaxLayer]; |
988 | Int_t k; | |
989 | for (k=0; k<kMaxLayer; k++) index[k]=-1; | |
c630aafd | 990 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 991 | for (k=0; k<nc; k++) { |
c630aafd | 992 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 993 | index[nl]=idx; |
994 | } | |
880f41b9 | 995 | |
4ab260d6 | 996 | Int_t from, to, step; |
ee34184f | 997 | if (xx > t->GetX()) { |
4ab260d6 | 998 | from=0; to=kMaxLayer; |
999 | step=+1; | |
1000 | } else { | |
1001 | from=kMaxLayer-1; to=-1; | |
1002 | step=-1; | |
1003 | } | |
1004 | ||
1005 | for (Int_t i=from; i != to; i += step) { | |
18856a77 | 1006 | AliITSlayer &layer=fgLayers[i]; |
4ab260d6 | 1007 | Double_t r=layer.GetR(); |
1008 | ||
1009 | { | |
1010 | Double_t hI=i-0.5*step; | |
880f41b9 | 1011 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
18856a77 | 1012 | Double_t rs=0.5*(fgLayers[i-step].GetR() + r); |
61ab8ea8 | 1013 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1014 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1015 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1016 | return kFALSE; |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | ||
880f41b9 | 1021 | // remember old position [SR, GSI 18.02.2003] |
1022 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1023 | if (t->IsStartedTimeIntegral() && step==1) { | |
1024 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1025 | } | |
1026 | // | |
1027 | ||
4ab260d6 | 1028 | Double_t x,y,z; |
1029 | if (!t->GetGlobalXYZat(r,x,y,z)) { | |
1030 | return kFALSE; | |
1031 | } | |
1032 | Double_t phi=TMath::ATan2(y,x); | |
1033 | Int_t idet=layer.FindDetectorIndex(phi,z); | |
1034 | if (idet<0) { | |
1035 | return kFALSE; | |
1036 | } | |
1037 | const AliITSdetector &det=layer.GetDetector(idet); | |
1038 | phi=det.GetPhi(); | |
1039 | if (!t->Propagate(phi,det.GetR())) { | |
1040 | return kFALSE; | |
1041 | } | |
1042 | t->SetDetectorIndex(idet); | |
1043 | ||
00a7cc50 | 1044 | const AliITSRecPoint *cl=0; |
4ab260d6 | 1045 | Double_t maxchi2=kMaxChi2; |
1046 | ||
1047 | Int_t idx=index[i]; | |
1048 | if (idx>0) { | |
00a7cc50 | 1049 | const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx); |
4ab260d6 | 1050 | if (idet != c->GetDetectorIndex()) { |
1051 | idet=c->GetDetectorIndex(); | |
1052 | const AliITSdetector &det=layer.GetDetector(idet); | |
1053 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1054 | return kFALSE; | |
1055 | } | |
1056 | t->SetDetectorIndex(idet); | |
1057 | } | |
1058 | Double_t chi2=t->GetPredictedChi2(c); | |
c630aafd | 1059 | if (chi2<maxchi2) { |
1060 | cl=c; | |
1061 | maxchi2=chi2; | |
1062 | } else { | |
1063 | return kFALSE; | |
1064 | } | |
4ab260d6 | 1065 | } |
ef7253ac | 1066 | |
4ab260d6 | 1067 | if (cl) { |
1f3e997f | 1068 | // Take into account the mis-alignment |
1069 | Double_t x=t->GetX()+cl->GetX(); | |
1070 | if (!t->PropagateTo(x,0.,0.)) return kFALSE; | |
4ab260d6 | 1071 | if (!t->Update(cl,maxchi2,idx)) { |
1072 | return kFALSE; | |
1073 | } | |
880f41b9 | 1074 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1075 | } |
1076 | ||
1077 | { | |
61ab8ea8 | 1078 | Double_t x0; |
1079 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1080 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1081 | } |
880f41b9 | 1082 | |
ef7253ac | 1083 | if (extra) { //search for extra clusters |
1084 | AliITStrackV2 tmp(*t); | |
1085 | Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]); | |
1086 | if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl()); | |
1087 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]); | |
1088 | if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp()); | |
1089 | Double_t zmin=t->GetZ() - dz; | |
1090 | Double_t zmax=t->GetZ() + dz; | |
1091 | Double_t ymin=t->GetY() + phi*r - dy; | |
1092 | Double_t ymax=t->GetY() + phi*r + dy; | |
1093 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1094 | ||
1095 | const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1; | |
1096 | Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1; | |
1097 | while ((c=layer.GetNextCluster(ci))!=0) { | |
1098 | if (idet == c->GetDetectorIndex()) continue; | |
1099 | ||
1100 | const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex()); | |
1101 | ||
1102 | if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue; | |
1103 | ||
1104 | if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue; | |
1105 | if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue; | |
1106 | ||
1107 | Double_t chi2=tmp.GetPredictedChi2(c); | |
1108 | if (chi2<maxchi2) { maxchi2=chi2; cci=ci; } | |
1109 | } | |
1110 | if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci); | |
1111 | } | |
1112 | ||
880f41b9 | 1113 | // track time update [SR, GSI 17.02.2003] |
1114 | if (t->IsStartedTimeIntegral() && step==1) { | |
1115 | Double_t newX, newY, newZ; | |
1116 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1117 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1118 | (oldZ-newZ)*(oldZ-newZ); | |
1119 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1120 | } | |
1121 | // | |
4ab260d6 | 1122 | |
1123 | } | |
1124 | ||
ee34184f | 1125 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1126 | return kTRUE; |
1127 | } | |
1128 | ||
b87bd7cd | 1129 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1130 | //-------------------------------------------------------------------- | |
1131 | // This function marks clusters assigned to the track | |
1132 | //-------------------------------------------------------------------- | |
1133 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1134 | |
5482d29d | 1135 | Int_t clusterIndex = t->GetClusterIndex(0); |
1136 | AliITSRecPoint *c= 0x0; | |
1137 | ||
1138 | if (clusterIndex>-1) | |
1139 | c = (AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1140 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
5482d29d | 1141 | |
1142 | c = 0x0; | |
1143 | clusterIndex = t->GetClusterIndex(1); | |
1144 | if (clusterIndex>-1) | |
1145 | c=(AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1146 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
880f41b9 | 1147 | |
b87bd7cd | 1148 | } |