]>
Commit | Line | Data |
---|---|---|
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 | ||
006b5f7f | 26 | #include <TFile.h> |
27 | #include <TTree.h> | |
28 | #include <TRandom.h> | |
a504d56f | 29 | #include <TGeoMatrix.h> |
006b5f7f | 30 | |
e341247d | 31 | #include "AliITSgeomTGeo.h" |
a504d56f | 32 | #include "AliAlignObj.h" |
006b5f7f | 33 | #include "AliITSRecPoint.h" |
c630aafd | 34 | #include "AliESD.h" |
00a7cc50 | 35 | #include "AliITSRecPoint.h" |
006b5f7f | 36 | #include "AliITStrackerV2.h" |
37 | ||
8676d691 | 38 | ClassImp(AliITStrackerV2) |
006b5f7f | 39 | |
a504d56f | 40 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; //ITS layers |
006b5f7f | 41 | |
6c94f330 | 42 | AliITStrackerV2::AliITStrackerV2(): |
43 | AliTracker(), | |
44 | fI(kMaxLayer), | |
45 | fBestTrack(), | |
46 | fTrackToFollow(), | |
47 | fPass(0), | |
48 | fLastLayerToTrackTo(kLastLayerToTrackTo) | |
49 | { | |
50 | //-------------------------------------------------------------------- | |
51 | //This is the AliITStrackerV2 default constructor | |
52 | //-------------------------------------------------------------------- | |
53 | ||
54 | for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer(); | |
55 | ||
56 | fConstraint[0]=1; fConstraint[1]=0; | |
57 | ||
58 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
59 | SetVertex(xyz,ers); | |
60 | ||
61 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
62 | ||
63 | } | |
64 | ||
65 | AliITStrackerV2::AliITStrackerV2(const AliITStrackerV2 &t): | |
66 | AliTracker(t), | |
67 | fI(t.fI), | |
68 | fBestTrack(t.fBestTrack), | |
69 | fTrackToFollow(t.fTrackToFollow), | |
70 | fPass(t.fPass), | |
71 | fLastLayerToTrackTo(t.fLastLayerToTrackTo) | |
72 | { | |
73 | //-------------------------------------------------------------------- | |
74 | //This is the AliITStrackerV2 copy constructor | |
75 | //-------------------------------------------------------------------- | |
76 | ||
77 | //for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer(); | |
78 | ||
79 | fConstraint[0]=t.fConstraint[0]; fConstraint[1]=t.fConstraint[1]; | |
80 | ||
81 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
82 | xyz[0]=t.GetX(); xyz[1]=t.GetY(); xyz[2]=t.GetZ(); | |
83 | ers[0]=t.GetSigmaX(); ers[1]=t.GetSigmaY(); ers[2]=t.GetSigmaZ(); | |
84 | SetVertex(xyz,ers); | |
85 | ||
86 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=t.fLayersNotToSkip[i]; | |
87 | ||
88 | } | |
89 | ||
1f3e997f | 90 | AliITStrackerV2::AliITStrackerV2(const Char_t *geom) : |
6c94f330 | 91 | AliTracker(), |
92 | fI(kMaxLayer), | |
93 | fBestTrack(), | |
94 | fTrackToFollow(), | |
95 | fPass(0), | |
96 | fLastLayerToTrackTo(kLastLayerToTrackTo) | |
97 | { | |
006b5f7f | 98 | //-------------------------------------------------------------------- |
61ab8ea8 | 99 | //This is the AliITStrackerV2 constructor |
006b5f7f | 100 | //-------------------------------------------------------------------- |
e341247d | 101 | if (geom) { |
102 | AliWarning("\"geom\" is actually a dummy argument !"); | |
103 | } | |
006b5f7f | 104 | |
e341247d | 105 | for (Int_t i=1; i<kMaxLayer+1; i++) { |
106 | Int_t nlad=AliITSgeomTGeo::GetNLadders(i); | |
107 | Int_t ndet=AliITSgeomTGeo::GetNDetectors(i); | |
006b5f7f | 108 | |
e341247d | 109 | Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2]; |
110 | AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz); | |
006b5f7f | 111 | Double_t poff=TMath::ATan2(y,x); |
112 | Double_t zoff=z; | |
a504d56f | 113 | Double_t r=TMath::Sqrt(x*x + y*y); |
006b5f7f | 114 | |
e341247d | 115 | AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz); |
006b5f7f | 116 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 117 | AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz); |
006b5f7f | 118 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 119 | AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz); |
006b5f7f | 120 | r += TMath::Sqrt(x*x + y*y); |
121 | r*=0.25; | |
122 | ||
18856a77 | 123 | new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); |
006b5f7f | 124 | |
125 | for (Int_t j=1; j<nlad+1; j++) { | |
126 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
e341247d | 127 | TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m); |
1f3e997f | 128 | const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k); |
129 | m.Multiply(tm); | |
130 | Double_t txyz[3]={0.}, xyz[3]={0.}; | |
131 | m.LocalToMaster(txyz,xyz); | |
132 | Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); | |
133 | Double_t phi=TMath::ATan2(xyz[1],xyz[0]); | |
c219fd63 | 134 | |
135 | if (phi<0) phi+=TMath::TwoPi(); | |
136 | else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi(); | |
137 | ||
18856a77 | 138 | AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1); |
006b5f7f | 139 | new(&det) AliITSdetector(r,phi); |
140 | } | |
141 | } | |
c630aafd | 142 | |
006b5f7f | 143 | } |
144 | ||
c219fd63 | 145 | fConstraint[0]=1; fConstraint[1]=0; |
8676d691 | 146 | |
147 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
148 | SetVertex(xyz,ers); | |
c0dd5278 | 149 | |
150 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
c0dd5278 | 151 | |
152 | } | |
153 | ||
154 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
155 | //-------------------------------------------------------------------- | |
156 | //This function set masks of the layers which must be not skipped | |
157 | //-------------------------------------------------------------------- | |
158 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i]; | |
61ab8ea8 | 159 | } |
006b5f7f | 160 | |
c630aafd | 161 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 162 | //-------------------------------------------------------------------- |
163 | //This function loads ITS clusters | |
164 | //-------------------------------------------------------------------- | |
00a7cc50 | 165 | TBranch *branch=cTree->GetBranch("ITSRecPoints"); |
61ab8ea8 | 166 | if (!branch) { |
c630aafd | 167 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 168 | return 1; |
61ab8ea8 | 169 | } |
006b5f7f | 170 | |
00a7cc50 | 171 | TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy; |
61ab8ea8 | 172 | branch->SetAddress(&clusters); |
006b5f7f | 173 | |
61ab8ea8 | 174 | Int_t j=0; |
175 | for (Int_t i=0; i<kMaxLayer; i++) { | |
18856a77 | 176 | Int_t ndet=fgLayers[i].GetNdetectors(); |
177 | Int_t jmax = j + fgLayers[i].GetNladders()*ndet; | |
c219fd63 | 178 | |
179 | Double_t r=fgLayers[i].GetR(); | |
180 | Double_t circ=TMath::TwoPi()*r; | |
181 | ||
61ab8ea8 | 182 | for (; j<jmax; j++) { |
183 | if (!cTree->GetEvent(j)) continue; | |
184 | Int_t ncl=clusters->GetEntriesFast(); | |
1f3e997f | 185 | |
186 | //*** The Delta transformation | |
187 | TGeoHMatrix delta; | |
188 | AliITSgeomTGeo::GetTrackingMatrix(j,delta); | |
189 | TGeoHMatrix m; | |
190 | AliITSgeomTGeo::GetOrigMatrix(j,m); | |
191 | delta.MultiplyLeft(&(m.Inverse())); | |
192 | const TGeoHMatrix *tm = AliITSgeomTGeo::GetTracking2LocalMatrix(j); | |
193 | delta.MultiplyLeft(&(tm->Inverse())); | |
194 | //*** | |
195 | ||
61ab8ea8 | 196 | while (ncl--) { |
00a7cc50 | 197 | AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl); |
c219fd63 | 198 | |
1f3e997f | 199 | //*** Shift the cluster to the misaligned position |
200 | Double_t xyz[3]={c->GetX(),c->GetY(),c->GetZ()}; | |
201 | Double_t mxyz[3]={0.}; | |
202 | ||
203 | delta.LocalToMaster(xyz,mxyz); | |
204 | ||
205 | c->SetX(mxyz[0]); | |
206 | c->AliCluster::SetY(mxyz[1]); | |
207 | c->AliCluster::SetZ(mxyz[2]); | |
208 | //*** | |
209 | ||
c219fd63 | 210 | Int_t idx=c->GetDetectorIndex(); |
a504d56f | 211 | AliITSdetector &det=fgLayers[i].GetDetector(idx); |
212 | ||
a504d56f | 213 | Double_t y=r*det.GetPhi()+c->GetY(); |
c219fd63 | 214 | if (y>circ) y-=circ; else if (y<0) y+=circ; |
215 | c->SetPhiR(y); | |
216 | ||
00a7cc50 | 217 | fgLayers[i].InsertCluster(new AliITSRecPoint(*c)); |
61ab8ea8 | 218 | } |
219 | clusters->Delete(); | |
220 | } | |
18856a77 | 221 | fgLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 222 | } |
c630aafd | 223 | |
8676d691 | 224 | return 0; |
61ab8ea8 | 225 | } |
006b5f7f | 226 | |
61ab8ea8 | 227 | void AliITStrackerV2::UnloadClusters() { |
228 | //-------------------------------------------------------------------- | |
229 | //This function unloads ITS clusters | |
230 | //-------------------------------------------------------------------- | |
18856a77 | 231 | for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters(); |
006b5f7f | 232 | } |
233 | ||
880f41b9 | 234 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
235 | //-------------------------------------------------------------------- | |
236 | // Correction for the material between the TPC and the ITS | |
237 | // (should it belong to the TPC code ?) | |
238 | //-------------------------------------------------------------------- | |
239 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
240 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
241 | Double_t yr=12.8, dr=0.03; // rods ? | |
242 | Double_t zm=0.2, dm=0.40; // membrane | |
243 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
244 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
245 | ||
246 | if (t->GetX() > riw) { | |
247 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
248 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
249 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
250 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
251 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
252 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
253 | if (!t->PropagateTo(rs,ds)) return 1; | |
254 | } else if (t->GetX() < rs) { | |
255 | if (!t->PropagateTo(rs,-ds)) return 1; | |
256 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
257 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
258 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
ba1a3e1a | 259 | if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1; |
880f41b9 | 260 | } else { |
261 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
262 | return 1; | |
263 | } | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
c630aafd | 268 | Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) { |
006b5f7f | 269 | //-------------------------------------------------------------------- |
c630aafd | 270 | // This functions reconstructs ITS tracks |
271 | // The clusters must be already loaded ! | |
006b5f7f | 272 | //-------------------------------------------------------------------- |
c630aafd | 273 | TObjArray itsTracks(15000); |
006b5f7f | 274 | |
c630aafd | 275 | {/* Read ESD tracks */ |
276 | Int_t nentr=event->GetNumberOfTracks(); | |
277 | Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr); | |
278 | while (nentr--) { | |
279 | AliESDtrack *esd=event->GetTrack(nentr); | |
280 | ||
ba1a3e1a | 281 | if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue; |
282 | if (esd->GetStatus()&AliESDtrack::kTPCout) continue; | |
283 | if (esd->GetStatus()&AliESDtrack::kITSin) continue; | |
c630aafd | 284 | |
285 | AliITStrackV2 *t=0; | |
286 | try { | |
287 | t=new AliITStrackV2(*esd); | |
288 | } catch (const Char_t *msg) { | |
289 | Warning("Clusters2Tracks",msg); | |
290 | delete t; | |
291 | continue; | |
292 | } | |
6c94f330 | 293 | if (TMath::Abs(t->GetD(GetX(),GetY()))>4) { |
ebd8369c | 294 | delete t; |
295 | continue; | |
296 | } | |
006b5f7f | 297 | |
c630aafd | 298 | if (CorrectForDeadZoneMaterial(t)!=0) { |
299 | Warning("Clusters2Tracks", | |
300 | "failed to correct for the material in the dead zone !\n"); | |
301 | delete t; | |
302 | continue; | |
303 | } | |
304 | itsTracks.AddLast(t); | |
305 | } | |
306 | } /* End Read ESD tracks */ | |
307 | ||
308 | itsTracks.Sort(); | |
309 | Int_t nentr=itsTracks.GetEntriesFast(); | |
15dd636f | 310 | |
c630aafd | 311 | Int_t ntrk=0; |
312 | for (fPass=0; fPass<2; fPass++) { | |
313 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
314 | for (Int_t i=0; i<nentr; i++) { | |
315 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
15dd636f | 316 | if (t==0) continue; //this track has been already tracked |
c630aafd | 317 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label |
318 | ||
319 | ResetTrackToFollow(*t); | |
320 | ResetBestTrack(); | |
321 | ||
322 | for (FollowProlongation(); fI<kMaxLayer; fI++) { | |
15dd636f | 323 | while (TakeNextProlongation()) FollowProlongation(); |
c630aafd | 324 | } |
325 | ||
de5d3595 | 326 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
15dd636f | 327 | |
c630aafd | 328 | if (fConstraint[fPass]) { |
15dd636f | 329 | ResetTrackToFollow(*t); |
330 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
331 | ResetBestTrack(); | |
332 | } | |
333 | ||
c630aafd | 334 | fBestTrack.SetLabel(tpcLabel); |
335 | fBestTrack.CookdEdx(); | |
336 | CookLabel(&fBestTrack,0.); //For comparison only | |
337 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
15dd636f | 338 | UseClusters(&fBestTrack); |
c630aafd | 339 | delete itsTracks.RemoveAt(i); |
340 | ntrk++; | |
341 | } | |
342 | } | |
babd135a | 343 | |
c630aafd | 344 | itsTracks.Delete(); |
2257f27e | 345 | |
c630aafd | 346 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
c630aafd | 351 | Int_t AliITStrackerV2::PropagateBack(AliESD *event) { |
352 | //-------------------------------------------------------------------- | |
353 | // This functions propagates reconstructed ITS tracks back | |
354 | // The clusters must be loaded ! | |
355 | //-------------------------------------------------------------------- | |
356 | Int_t nentr=event->GetNumberOfTracks(); | |
357 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
358 | ||
359 | Int_t ntrk=0; | |
360 | for (Int_t i=0; i<nentr; i++) { | |
361 | AliESDtrack *esd=event->GetTrack(i); | |
362 | ||
ba1a3e1a | 363 | if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue; |
364 | if (esd->GetStatus()&AliESDtrack::kITSout) continue; | |
c630aafd | 365 | |
366 | AliITStrackV2 *t=0; | |
367 | try { | |
368 | t=new AliITStrackV2(*esd); | |
369 | } catch (const Char_t *msg) { | |
370 | Warning("PropagateBack",msg); | |
371 | delete t; | |
372 | continue; | |
373 | } | |
374 | ||
375 | ResetTrackToFollow(*t); | |
376 | ||
377 | // propagete to vertex [SR, GSI 17.02.2003] | |
a9459f9c | 378 | // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov |
379 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) { | |
6c94f330 | 380 | if (fTrackToFollow.PropagateToVertex(event->GetVertex())) { |
a9459f9c | 381 | fTrackToFollow.StartTimeIntegral(); |
382 | } | |
383 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
384 | } | |
c630aafd | 385 | |
6c94f330 | 386 | fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters(); |
c630aafd | 387 | if (RefitAt(49.,&fTrackToFollow,t)) { |
388 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
389 | Warning("PropagateBack", | |
390 | "failed to correct for the material in the dead zone !\n"); | |
391 | delete t; | |
392 | continue; | |
393 | } | |
394 | fTrackToFollow.SetLabel(t->GetLabel()); | |
ba1a3e1a | 395 | //fTrackToFollow.CookdEdx(); |
c630aafd | 396 | CookLabel(&fTrackToFollow,0.); //For comparison only |
397 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
15dd636f | 398 | UseClusters(&fTrackToFollow); |
c630aafd | 399 | ntrk++; |
400 | } | |
401 | delete t; | |
402 | } | |
403 | ||
404 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 405 | |
83d73500 | 406 | return 0; |
407 | } | |
408 | ||
c630aafd | 409 | Int_t AliITStrackerV2::RefitInward(AliESD *event) { |
83d73500 | 410 | //-------------------------------------------------------------------- |
411 | // This functions refits ITS tracks using the | |
412 | // "inward propagated" TPC tracks | |
c630aafd | 413 | // The clusters must be loaded ! |
83d73500 | 414 | //-------------------------------------------------------------------- |
c630aafd | 415 | Int_t nentr=event->GetNumberOfTracks(); |
416 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
417 | ||
418 | Int_t ntrk=0; | |
419 | for (Int_t i=0; i<nentr; i++) { | |
420 | AliESDtrack *esd=event->GetTrack(i); | |
421 | ||
ba1a3e1a | 422 | if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue; |
423 | if (esd->GetStatus()&AliESDtrack::kITSrefit) continue; | |
424 | if (esd->GetStatus()&AliESDtrack::kTPCout) | |
15dd636f | 425 | if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue; |
c630aafd | 426 | |
427 | AliITStrackV2 *t=0; | |
428 | try { | |
429 | t=new AliITStrackV2(*esd); | |
430 | } catch (const Char_t *msg) { | |
431 | Warning("RefitInward",msg); | |
432 | delete t; | |
433 | continue; | |
434 | } | |
435 | ||
436 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
437 | Warning("RefitInward", | |
438 | "failed to correct for the material in the dead zone !\n"); | |
439 | delete t; | |
440 | continue; | |
441 | } | |
442 | ||
443 | ResetTrackToFollow(*t); | |
444 | fTrackToFollow.ResetClusters(); | |
445 | ||
446 | //Refitting... | |
ef7253ac | 447 | if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) { |
c630aafd | 448 | fTrackToFollow.SetLabel(t->GetLabel()); |
449 | fTrackToFollow.CookdEdx(); | |
15dd636f | 450 | CookLabel(&fTrackToFollow,0.); //For comparison only |
18856a77 | 451 | |
49d13e89 | 452 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe |
453 | AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack(); | |
454 | esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); | |
455 | Float_t r[3]={0.,0.,0.}; | |
456 | Double_t maxD=3.; | |
457 | esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD); | |
458 | ntrk++; | |
67c3dcbe | 459 | } |
c630aafd | 460 | } |
461 | delete t; | |
462 | } | |
463 | ||
464 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 465 | |
c630aafd | 466 | return 0; |
467 | } | |
83d73500 | 468 | |
006b5f7f | 469 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { |
470 | //-------------------------------------------------------------------- | |
471 | // Return pointer to a given cluster | |
472 | //-------------------------------------------------------------------- | |
473 | Int_t l=(index & 0xf0000000) >> 28; | |
474 | Int_t c=(index & 0x0fffffff) >> 00; | |
18856a77 | 475 | return fgLayers[l].GetCluster(c); |
006b5f7f | 476 | } |
477 | ||
478 | ||
479 | void AliITStrackerV2::FollowProlongation() { | |
480 | //-------------------------------------------------------------------- | |
481 | //This function finds a track prolongation | |
482 | //-------------------------------------------------------------------- | |
c0dd5278 | 483 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 484 | Int_t i=fI-1; |
8676d691 | 485 | |
18856a77 | 486 | AliITSlayer &layer=fgLayers[i]; |
a9a2d814 | 487 | AliITStrackV2 &track=fTracks[i]; |
006b5f7f | 488 | |
14825d5a | 489 | Double_t r=layer.GetR(); |
61ab8ea8 | 490 | |
a9a2d814 | 491 | if (i==3 || i==1) { |
18856a77 | 492 | Double_t rs=0.5*(fgLayers[i+1].GetR() + r); |
61ab8ea8 | 493 | Double_t d=0.0034, x0=38.6; |
494 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
495 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 496 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 497 | return; |
a9a2d814 | 498 | } |
006b5f7f | 499 | } |
500 | ||
501 | //find intersection | |
502 | Double_t x,y,z; | |
14825d5a | 503 | if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) { |
8676d691 | 504 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 505 | return; |
006b5f7f | 506 | } |
507 | Double_t phi=TMath::ATan2(y,x); | |
f363d377 | 508 | |
006b5f7f | 509 | Int_t idet=layer.FindDetectorIndex(phi,z); |
510 | if (idet<0) { | |
8676d691 | 511 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 512 | return; |
006b5f7f | 513 | } |
514 | ||
515 | //propagate to the intersection | |
516 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 517 | phi=det.GetPhi(); |
a9a2d814 | 518 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 519 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 520 | return; |
006b5f7f | 521 | } |
522 | fTrackToFollow.SetDetectorIndex(idet); | |
523 | ||
524 | //Select possible prolongations and store the current track estimation | |
525 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
8676d691 | 526 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); |
527 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); | |
528 | Double_t road=layer.GetRoad(); | |
529 | if (dz*dy>road*road) { | |
530 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
531 | dz=road*scz; dy=road*scy; | |
532 | } | |
b87bd7cd | 533 | |
534 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); | |
14825d5a | 535 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
7f6ddf58 | 536 | if (dz > kMaxRoad) { |
8676d691 | 537 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 538 | return; |
006b5f7f | 539 | } |
a9a2d814 | 540 | |
15dd636f | 541 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 542 | |
b87bd7cd | 543 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); |
14825d5a | 544 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
7f6ddf58 | 545 | if (dy > kMaxRoad) { |
8676d691 | 546 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 547 | return; |
006b5f7f | 548 | } |
a9a2d814 | 549 | |
c219fd63 | 550 | fI--; |
551 | ||
7f6ddf58 | 552 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 553 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 554 | Double_t ymin=track.GetY() + r*phi - dy; |
555 | Double_t ymax=track.GetY() + r*phi + dy; | |
c219fd63 | 556 | if (layer.SelectClusters(zmin,zmax,ymin,ymax)==0) |
557 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 558 | |
15dd636f | 559 | if (!TakeNextProlongation()) |
560 | if (fLayersNotToSkip[fI]) return; | |
561 | ||
006b5f7f | 562 | } |
563 | ||
564 | //deal with the best track | |
565 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
566 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
15dd636f | 567 | if (ncl) |
568 | if (ncl >= nclb) { | |
569 | Double_t chi2=fTrackToFollow.GetChi2(); | |
570 | if (chi2/ncl < kChi2PerCluster) { | |
571 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { | |
572 | ResetBestTrack(); | |
006b5f7f | 573 | } |
15dd636f | 574 | } |
006b5f7f | 575 | } |
15dd636f | 576 | |
006b5f7f | 577 | } |
578 | ||
006b5f7f | 579 | Int_t AliITStrackerV2::TakeNextProlongation() { |
580 | //-------------------------------------------------------------------- | |
a9a2d814 | 581 | // This function takes another track prolongation |
582 | // | |
583 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 584 | //-------------------------------------------------------------------- |
18856a77 | 585 | AliITSlayer &layer=fgLayers[fI]; |
4ab260d6 | 586 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 587 | |
b87bd7cd | 588 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]); |
589 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]); | |
8676d691 | 590 | Double_t road=layer.GetRoad(); |
591 | if (dz*dy>road*road) { | |
592 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
593 | dz=road*scz; dy=road*scy; | |
594 | } | |
006b5f7f | 595 | |
00a7cc50 | 596 | const AliITSRecPoint *c=0; Int_t ci=-1; |
597 | const AliITSRecPoint *cc=0; Int_t cci=-1; | |
c219fd63 | 598 | Double_t chi2=kMaxChi2; |
006b5f7f | 599 | while ((c=layer.GetNextCluster(ci))!=0) { |
006b5f7f | 600 | Int_t idet=c->GetDetectorIndex(); |
15dd636f | 601 | |
4ab260d6 | 602 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 603 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 604 | ResetTrackToFollow(fTracks[fI]); |
605 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 606 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 607 | continue; |
608 | } | |
4ab260d6 | 609 | fTrackToFollow.SetDetectorIndex(idet); |
610 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 611 | } |
612 | ||
4ab260d6 | 613 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
614 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 615 | |
c219fd63 | 616 | Double_t ch2=fTrackToFollow.GetPredictedChi2(c); |
617 | if (ch2 > chi2) continue; | |
618 | chi2=ch2; | |
619 | cc=c; cci=ci; | |
620 | break; | |
006b5f7f | 621 | } |
622 | ||
c219fd63 | 623 | if (!cc) return 0; |
006b5f7f | 624 | |
1f3e997f | 625 | {// Take into account the mis-alignment |
626 | Double_t x = fTrackToFollow.GetX() + cc->GetX(); | |
627 | if (!fTrackToFollow.PropagateTo(x,0.,0.)) return 0; | |
628 | } | |
c219fd63 | 629 | if (!fTrackToFollow.Update(cc,chi2,(fI<<28)+cci)) { |
8676d691 | 630 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 631 | return 0; |
632 | } | |
15dd636f | 633 | |
4ab260d6 | 634 | if (fTrackToFollow.GetNumberOfClusters()>1) |
6c94f330 | 635 | if (TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()))>4) return 0; |
4ab260d6 | 636 | |
a9a2d814 | 637 | fTrackToFollow. |
c219fd63 | 638 | SetSampledEdx(cc->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. |
a9a2d814 | 639 | |
640 | { | |
880f41b9 | 641 | Double_t x0; |
61ab8ea8 | 642 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 643 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 644 | } |
4ab260d6 | 645 | |
a9a2d814 | 646 | if (fConstraint[fPass]) { |
4ab260d6 | 647 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 648 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
649 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
650 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 651 | } |
006b5f7f | 652 | |
006b5f7f | 653 | return 1; |
654 | } | |
655 | ||
656 | ||
6c94f330 | 657 | AliITStrackerV2::AliITSlayer::AliITSlayer(): |
658 | fR(0.), | |
659 | fPhiOffset(0.), | |
660 | fNladders(0), | |
661 | fZOffset(0.), | |
662 | fNdetectors(0), | |
663 | fDetectors(0), | |
664 | fNsel(0), | |
665 | fRoad(2*fR*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
666 | { | |
006b5f7f | 667 | //-------------------------------------------------------------------- |
668 | //default AliITSlayer constructor | |
669 | //-------------------------------------------------------------------- | |
c219fd63 | 670 | |
671 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; | |
c219fd63 | 672 | |
006b5f7f | 673 | } |
674 | ||
675 | AliITStrackerV2::AliITSlayer:: | |
6c94f330 | 676 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd): |
677 | fR(r), | |
678 | fPhiOffset(p), | |
679 | fNladders(nl), | |
680 | fZOffset(z), | |
681 | fNdetectors(nd), | |
682 | fDetectors(new AliITSdetector[nl*nd]), | |
683 | fNsel(0), | |
684 | fRoad(2*r*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
685 | { | |
006b5f7f | 686 | //-------------------------------------------------------------------- |
687 | //main AliITSlayer constructor | |
688 | //-------------------------------------------------------------------- | |
006b5f7f | 689 | |
c219fd63 | 690 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; |
c219fd63 | 691 | |
692 | for (Int_t i=0; i<kMaxClusterPerLayer; i++) fClusters[i]=0; | |
b87bd7cd | 693 | |
006b5f7f | 694 | } |
695 | ||
696 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
697 | //-------------------------------------------------------------------- | |
698 | // AliITSlayer destructor | |
699 | //-------------------------------------------------------------------- | |
700 | delete[] fDetectors; | |
c219fd63 | 701 | ResetClusters(); |
006b5f7f | 702 | } |
703 | ||
61ab8ea8 | 704 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
705 | //-------------------------------------------------------------------- | |
706 | // This function removes loaded clusters | |
707 | //-------------------------------------------------------------------- | |
c219fd63 | 708 | for (Int_t s=0; s<kNsector; s++) { |
709 | Int_t &n=fN[s]; | |
710 | while (n) { | |
711 | n--; | |
712 | delete fClusters[s*kMaxClusterPerSector+n]; | |
713 | } | |
714 | } | |
61ab8ea8 | 715 | } |
716 | ||
b87bd7cd | 717 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
718 | //-------------------------------------------------------------------- | |
719 | // This function calculates the road defined by the cluster density | |
720 | //-------------------------------------------------------------------- | |
721 | Int_t n=0; | |
c219fd63 | 722 | for (Int_t s=0; s<kNsector; s++) { |
723 | Int_t i=fN[s]; | |
724 | while (i--) | |
725 | if (TMath::Abs(fClusters[s*kMaxClusterPerSector+i]->GetZ())<fR) n++; | |
b87bd7cd | 726 | } |
727 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
728 | } | |
729 | ||
00a7cc50 | 730 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSRecPoint *c) { |
006b5f7f | 731 | //-------------------------------------------------------------------- |
c219fd63 | 732 | // This function inserts a cluster to this layer in increasing |
733 | // order of the cluster's fZ | |
006b5f7f | 734 | //-------------------------------------------------------------------- |
c219fd63 | 735 | Float_t circ=TMath::TwoPi()*fR; |
736 | Int_t sec=Int_t(kNsector*c->GetPhiR()/circ); | |
81e97e0d | 737 | if (sec>=kNsector) { |
738 | ::Error("InsertCluster","Wrong sector !\n"); | |
739 | return 1; | |
740 | } | |
c219fd63 | 741 | Int_t &n=fN[sec]; |
742 | if (n>=kMaxClusterPerSector) { | |
743 | ::Error("InsertCluster","Too many clusters !\n"); | |
744 | return 1; | |
006b5f7f | 745 | } |
c219fd63 | 746 | if (n==0) fClusters[sec*kMaxClusterPerSector]=c; |
747 | else { | |
748 | Int_t i=FindClusterIndex(c->GetZ(),sec); | |
749 | Int_t k=n-i+sec*kMaxClusterPerSector; | |
00a7cc50 | 750 | memmove(fClusters+i+1 ,fClusters+i,k*sizeof(AliITSRecPoint*)); |
c219fd63 | 751 | fClusters[i]=c; |
752 | } | |
753 | n++; | |
006b5f7f | 754 | return 0; |
755 | } | |
756 | ||
c219fd63 | 757 | Int_t |
758 | AliITStrackerV2::AliITSlayer::FindClusterIndex(Float_t z,Int_t s) const { | |
006b5f7f | 759 | //-------------------------------------------------------------------- |
c219fd63 | 760 | // For the sector "s", this function returns the index of the first |
761 | // with its fZ >= "z". | |
006b5f7f | 762 | //-------------------------------------------------------------------- |
c219fd63 | 763 | Int_t nc=fN[s]; |
764 | if (nc==0) return kMaxClusterPerSector*s; | |
765 | ||
766 | Int_t b=kMaxClusterPerSector*s; | |
767 | if (z <= fClusters[b]->GetZ()) return b; | |
768 | ||
769 | Int_t e=b+nc-1; | |
770 | if (z > fClusters[e]->GetZ()) return e+1; | |
771 | ||
772 | Int_t m=(b+e)/2; | |
006b5f7f | 773 | for (; b<e; m=(b+e)/2) { |
774 | if (z > fClusters[m]->GetZ()) b=m+1; | |
775 | else e=m; | |
776 | } | |
777 | return m; | |
778 | } | |
779 | ||
c219fd63 | 780 | Int_t AliITStrackerV2::AliITSlayer:: |
781 | SelectClusters(Float_t zmin,Float_t zmax,Float_t ymin, Float_t ymax) { | |
006b5f7f | 782 | //-------------------------------------------------------------------- |
c219fd63 | 783 | // This function selects clusters within the "window" |
006b5f7f | 784 | //-------------------------------------------------------------------- |
c219fd63 | 785 | Float_t circ=fR*TMath::TwoPi(); |
786 | ||
787 | if (ymin>circ) ymin-=circ; else if (ymin<0) ymin+=circ; | |
788 | if (ymax>circ) ymax-=circ; else if (ymax<0) ymax+=circ; | |
789 | ||
521f4796 | 790 | Int_t i1=Int_t(kNsector*ymin/circ); if (i1==kNsector) i1--; |
c219fd63 | 791 | if (fN[i1]!=0) { |
792 | Float_t ym = (ymax<ymin) ? ymax+circ : ymax; | |
793 | Int_t i=FindClusterIndex(zmin,i1), imax=i1*kMaxClusterPerSector+fN[i1]; | |
794 | for (; i<imax; i++) { | |
00a7cc50 | 795 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 796 | if (c->IsUsed()) continue; |
797 | if (c->GetZ()>zmax) break; | |
798 | if (c->GetPhiR()<=ymin) continue; | |
799 | if (c->GetPhiR()>ym) continue; | |
800 | fIndex[fNsel++]=i; | |
801 | } | |
802 | } | |
803 | ||
521f4796 | 804 | Int_t i2=Int_t(kNsector*ymax/circ); if (i2==kNsector) i2--; |
c219fd63 | 805 | if (i2==i1) return fNsel; |
806 | ||
807 | if (fN[i2]!=0) { | |
808 | Float_t ym = (ymin>ymax) ? ymin-circ : ymin; | |
809 | Int_t i=FindClusterIndex(zmin,i2), imax=i2*kMaxClusterPerSector+fN[i2]; | |
810 | for (; i<imax; i++) { | |
00a7cc50 | 811 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 812 | if (c->IsUsed()) continue; |
813 | if (c->GetZ()>zmax) break; | |
814 | if (c->GetPhiR()<=ym) continue; | |
815 | if (c->GetPhiR()>ymax) continue; | |
816 | fIndex[fNsel++]=i; | |
817 | } | |
818 | } | |
819 | ||
820 | return fNsel; | |
006b5f7f | 821 | } |
822 | ||
00a7cc50 | 823 | const AliITSRecPoint *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ |
006b5f7f | 824 | //-------------------------------------------------------------------- |
825 | // This function returns clusters within the "window" | |
826 | //-------------------------------------------------------------------- | |
00a7cc50 | 827 | AliITSRecPoint *c=0; |
c219fd63 | 828 | ci=-1; |
829 | if (fNsel) { | |
830 | fNsel--; | |
831 | ci=fIndex[fNsel]; | |
832 | c=fClusters[ci]; | |
006b5f7f | 833 | } |
c219fd63 | 834 | return c; |
835 | } | |
7f6ddf58 | 836 | |
c219fd63 | 837 | Int_t AliITStrackerV2::AliITSlayer::GetNumberOfClusters() const { |
838 | Int_t n=0; | |
839 | for (Int_t s=0; s<kNsector; s++) n+=fN[s]; | |
840 | return n; | |
006b5f7f | 841 | } |
842 | ||
c219fd63 | 843 | Int_t |
844 | AliITStrackerV2::AliITSlayer::FindDetectorIndex(Double_t phi,Double_t z)const { | |
006b5f7f | 845 | //-------------------------------------------------------------------- |
846 | //This function finds the detector crossed by the track | |
847 | //-------------------------------------------------------------------- | |
f363d377 | 848 | Double_t dphi=-(phi-fPhiOffset); |
006b5f7f | 849 | if (dphi < 0) dphi += 2*TMath::Pi(); |
850 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
851 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 852 | if (np>=fNladders) np-=fNladders; |
853 | if (np<0) np+=fNladders; | |
006b5f7f | 854 | |
855 | Double_t dz=fZOffset-z; | |
856 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 857 | if (nz>=fNdetectors) return -1; |
858 | if (nz<0) return -1; | |
006b5f7f | 859 | |
006b5f7f | 860 | return np*fNdetectors + nz; |
861 | } | |
862 | ||
863 | Double_t | |
61ab8ea8 | 864 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
865 | const { | |
a9a2d814 | 866 | //-------------------------------------------------------------------- |
867 | //This function returns the layer thickness at this point (units X0) | |
868 | //-------------------------------------------------------------------- | |
869 | Double_t d=0.0085; | |
61ab8ea8 | 870 | x0=21.82; |
a9a2d814 | 871 | |
872 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 873 | Double_t dd=0.0034; |
874 | d=dd; | |
875 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
876 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
877 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 878 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 879 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
880 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
881 | d+=0.0034; | |
882 | break; | |
883 | } | |
884 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
885 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
886 | d+=0.0034; | |
887 | break; | |
888 | } | |
889 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
890 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 891 | } |
892 | } else | |
893 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 894 | Double_t dd=0.0034; |
895 | d=dd; | |
896 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
897 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
898 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 899 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 900 | if (TMath::Abs(z-3.9*i)<0.15) { |
901 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
902 | d+=dd; | |
903 | break; | |
904 | } | |
905 | if (TMath::Abs(z+3.9*i)<0.15) { | |
906 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
907 | d+=dd; | |
908 | break; | |
909 | } | |
910 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
911 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 912 | } |
913 | } else | |
914 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 915 | Double_t dd=0.0033; |
916 | d=dd; | |
917 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
918 | ||
919 | if (TMath::Abs(y-1.80)<0.55) { | |
920 | d+=0.016; | |
921 | for (Int_t j=0; j<20; j++) { | |
922 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
923 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
924 | } | |
925 | } | |
926 | if (TMath::Abs(y+1.80)<0.55) { | |
927 | d+=0.016; | |
928 | for (Int_t j=0; j<20; j++) { | |
929 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
930 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
931 | } | |
932 | } | |
933 | ||
934 | for (Int_t i=0; i<4; i++) { | |
935 | if (TMath::Abs(z-7.3*i)<0.60) { | |
936 | d+=dd; | |
937 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
938 | break; | |
939 | } | |
940 | if (TMath::Abs(z+7.3*i)<0.60) { | |
941 | d+=dd; | |
942 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
943 | break; | |
944 | } | |
a9a2d814 | 945 | } |
946 | } else | |
947 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 948 | Double_t dd=0.0063; x0=21.5; |
949 | d=dd; | |
950 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
951 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
952 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 953 | } else |
954 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 955 | Double_t dd=0.0063; x0=21.5; |
956 | d=dd; | |
957 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
958 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
959 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 960 | } |
961 | ||
a9a2d814 | 962 | return d; |
963 | } | |
006b5f7f | 964 | |
a9a2d814 | 965 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 966 | { |
967 | //-------------------------------------------------------------------- | |
a9a2d814 | 968 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 969 | //-------------------------------------------------------------------- |
61ab8ea8 | 970 | Double_t d=0.0028*3*3; //beam pipe |
971 | Double_t x0=0; | |
006b5f7f | 972 | |
18856a77 | 973 | Double_t xn=fgLayers[fI].GetR(); |
006b5f7f | 974 | for (Int_t i=0; i<fI; i++) { |
18856a77 | 975 | Double_t xi=fgLayers[i].GetR(); |
976 | d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi; | |
006b5f7f | 977 | } |
978 | ||
979 | if (fI>1) { | |
61ab8ea8 | 980 | Double_t xi=9.; |
981 | d+=0.0097*xi*xi; | |
006b5f7f | 982 | } |
983 | ||
984 | if (fI>3) { | |
18856a77 | 985 | Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR()); |
61ab8ea8 | 986 | d+=0.0034*xi*xi; |
006b5f7f | 987 | } |
61ab8ea8 | 988 | |
006b5f7f | 989 | return d/(xn*xn); |
990 | } | |
991 | ||
ef7253ac | 992 | Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t, |
993 | const AliITStrackV2 *c, Bool_t extra) { | |
4ab260d6 | 994 | //-------------------------------------------------------------------- |
c630aafd | 995 | // This function refits the track "t" at the position "x" using |
996 | // the clusters from "c" | |
ef7253ac | 997 | // If "extra"==kTRUE, |
998 | // the clusters from overlapped modules get attached to "t" | |
4ab260d6 | 999 | //-------------------------------------------------------------------- |
880f41b9 | 1000 | Int_t index[kMaxLayer]; |
1001 | Int_t k; | |
1002 | for (k=0; k<kMaxLayer; k++) index[k]=-1; | |
c630aafd | 1003 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 1004 | for (k=0; k<nc; k++) { |
c630aafd | 1005 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 1006 | index[nl]=idx; |
1007 | } | |
880f41b9 | 1008 | |
4ab260d6 | 1009 | Int_t from, to, step; |
ee34184f | 1010 | if (xx > t->GetX()) { |
4ab260d6 | 1011 | from=0; to=kMaxLayer; |
1012 | step=+1; | |
1013 | } else { | |
1014 | from=kMaxLayer-1; to=-1; | |
1015 | step=-1; | |
1016 | } | |
1017 | ||
1018 | for (Int_t i=from; i != to; i += step) { | |
18856a77 | 1019 | AliITSlayer &layer=fgLayers[i]; |
4ab260d6 | 1020 | Double_t r=layer.GetR(); |
1021 | ||
1022 | { | |
1023 | Double_t hI=i-0.5*step; | |
880f41b9 | 1024 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
18856a77 | 1025 | Double_t rs=0.5*(fgLayers[i-step].GetR() + r); |
61ab8ea8 | 1026 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1027 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1028 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1029 | return kFALSE; |
1030 | } | |
1031 | } | |
1032 | } | |
1033 | ||
880f41b9 | 1034 | // remember old position [SR, GSI 18.02.2003] |
1035 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1036 | if (t->IsStartedTimeIntegral() && step==1) { | |
1037 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1038 | } | |
1039 | // | |
1040 | ||
4ab260d6 | 1041 | Double_t x,y,z; |
1042 | if (!t->GetGlobalXYZat(r,x,y,z)) { | |
1043 | return kFALSE; | |
1044 | } | |
1045 | Double_t phi=TMath::ATan2(y,x); | |
1046 | Int_t idet=layer.FindDetectorIndex(phi,z); | |
1047 | if (idet<0) { | |
1048 | return kFALSE; | |
1049 | } | |
1050 | const AliITSdetector &det=layer.GetDetector(idet); | |
1051 | phi=det.GetPhi(); | |
1052 | if (!t->Propagate(phi,det.GetR())) { | |
1053 | return kFALSE; | |
1054 | } | |
1055 | t->SetDetectorIndex(idet); | |
1056 | ||
00a7cc50 | 1057 | const AliITSRecPoint *cl=0; |
4ab260d6 | 1058 | Double_t maxchi2=kMaxChi2; |
1059 | ||
1060 | Int_t idx=index[i]; | |
1061 | if (idx>0) { | |
00a7cc50 | 1062 | const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx); |
4ab260d6 | 1063 | if (idet != c->GetDetectorIndex()) { |
1064 | idet=c->GetDetectorIndex(); | |
1065 | const AliITSdetector &det=layer.GetDetector(idet); | |
1066 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1067 | return kFALSE; | |
1068 | } | |
1069 | t->SetDetectorIndex(idet); | |
1070 | } | |
1071 | Double_t chi2=t->GetPredictedChi2(c); | |
c630aafd | 1072 | if (chi2<maxchi2) { |
1073 | cl=c; | |
1074 | maxchi2=chi2; | |
1075 | } else { | |
1076 | return kFALSE; | |
1077 | } | |
4ab260d6 | 1078 | } |
ef7253ac | 1079 | |
4ab260d6 | 1080 | if (cl) { |
1f3e997f | 1081 | // Take into account the mis-alignment |
1082 | Double_t x=t->GetX()+cl->GetX(); | |
1083 | if (!t->PropagateTo(x,0.,0.)) return kFALSE; | |
4ab260d6 | 1084 | if (!t->Update(cl,maxchi2,idx)) { |
1085 | return kFALSE; | |
1086 | } | |
880f41b9 | 1087 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1088 | } |
1089 | ||
1090 | { | |
61ab8ea8 | 1091 | Double_t x0; |
1092 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1093 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1094 | } |
880f41b9 | 1095 | |
ef7253ac | 1096 | if (extra) { //search for extra clusters |
1097 | AliITStrackV2 tmp(*t); | |
1098 | Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]); | |
1099 | if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl()); | |
1100 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]); | |
1101 | if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp()); | |
1102 | Double_t zmin=t->GetZ() - dz; | |
1103 | Double_t zmax=t->GetZ() + dz; | |
1104 | Double_t ymin=t->GetY() + phi*r - dy; | |
1105 | Double_t ymax=t->GetY() + phi*r + dy; | |
1106 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1107 | ||
1108 | const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1; | |
1109 | Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1; | |
1110 | while ((c=layer.GetNextCluster(ci))!=0) { | |
1111 | if (idet == c->GetDetectorIndex()) continue; | |
1112 | ||
1113 | const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex()); | |
1114 | ||
1115 | if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue; | |
1116 | ||
1117 | if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue; | |
1118 | if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue; | |
1119 | ||
1120 | Double_t chi2=tmp.GetPredictedChi2(c); | |
1121 | if (chi2<maxchi2) { maxchi2=chi2; cci=ci; } | |
1122 | } | |
1123 | if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci); | |
1124 | } | |
1125 | ||
880f41b9 | 1126 | // track time update [SR, GSI 17.02.2003] |
1127 | if (t->IsStartedTimeIntegral() && step==1) { | |
1128 | Double_t newX, newY, newZ; | |
1129 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1130 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1131 | (oldZ-newZ)*(oldZ-newZ); | |
1132 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1133 | } | |
1134 | // | |
4ab260d6 | 1135 | |
1136 | } | |
1137 | ||
ee34184f | 1138 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1139 | return kTRUE; |
1140 | } | |
1141 | ||
b87bd7cd | 1142 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1143 | //-------------------------------------------------------------------- | |
1144 | // This function marks clusters assigned to the track | |
1145 | //-------------------------------------------------------------------- | |
1146 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1147 | |
5482d29d | 1148 | Int_t clusterIndex = t->GetClusterIndex(0); |
1149 | AliITSRecPoint *c= 0x0; | |
1150 | ||
1151 | if (clusterIndex>-1) | |
1152 | c = (AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1153 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
5482d29d | 1154 | |
1155 | c = 0x0; | |
1156 | clusterIndex = t->GetClusterIndex(1); | |
1157 | if (clusterIndex>-1) | |
1158 | c=(AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1159 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
880f41b9 | 1160 | |
b87bd7cd | 1161 | } |