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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" |
af885e0f | 35 | #include "AliESDEvent.h" |
aad72f45 | 36 | #include "AliESDtrack.h" |
00a7cc50 | 37 | #include "AliITSRecPoint.h" |
44347160 | 38 | #include "AliITSReconstructor.h" |
006b5f7f | 39 | #include "AliITStrackerV2.h" |
40 | ||
8676d691 | 41 | ClassImp(AliITStrackerV2) |
006b5f7f | 42 | |
e50912db | 43 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[AliITSgeomTGeo::kNLayers]; //ITS layers |
006b5f7f | 44 | |
6c94f330 | 45 | AliITStrackerV2::AliITStrackerV2(): |
46 | AliTracker(), | |
e50912db | 47 | fI(AliITSgeomTGeo::GetNLayers()), |
6c94f330 | 48 | fBestTrack(), |
49 | fTrackToFollow(), | |
50 | fPass(0), | |
e50912db | 51 | fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()) |
6c94f330 | 52 | { |
53 | //-------------------------------------------------------------------- | |
54 | //This is the AliITStrackerV2 default constructor | |
55 | //-------------------------------------------------------------------- | |
56 | ||
e50912db | 57 | for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) new(fgLayers+i-1) AliITSlayer(); |
6c94f330 | 58 | |
59 | fConstraint[0]=1; fConstraint[1]=0; | |
60 | ||
44347160 | 61 | Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(), |
62 | AliITSReconstructor::GetRecoParam()->GetYVdef(), | |
63 | AliITSReconstructor::GetRecoParam()->GetZVdef()}; | |
64 | Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(), | |
65 | AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(), | |
66 | AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()}; | |
6c94f330 | 67 | SetVertex(xyz,ers); |
68 | ||
e50912db | 69 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i); |
6c94f330 | 70 | |
71 | } | |
72 | ||
73 | AliITStrackerV2::AliITStrackerV2(const AliITStrackerV2 &t): | |
74 | AliTracker(t), | |
75 | fI(t.fI), | |
76 | fBestTrack(t.fBestTrack), | |
77 | fTrackToFollow(t.fTrackToFollow), | |
78 | fPass(t.fPass), | |
79 | fLastLayerToTrackTo(t.fLastLayerToTrackTo) | |
80 | { | |
81 | //-------------------------------------------------------------------- | |
82 | //This is the AliITStrackerV2 copy constructor | |
83 | //-------------------------------------------------------------------- | |
84 | ||
e50912db | 85 | //for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) new(fgLayers+i-1) AliITSlayer(); |
6c94f330 | 86 | |
87 | fConstraint[0]=t.fConstraint[0]; fConstraint[1]=t.fConstraint[1]; | |
88 | ||
44347160 | 89 | Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(), |
90 | AliITSReconstructor::GetRecoParam()->GetYVdef(), | |
91 | AliITSReconstructor::GetRecoParam()->GetZVdef()}; | |
92 | Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(), | |
93 | AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(), | |
94 | AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()}; | |
6c94f330 | 95 | xyz[0]=t.GetX(); xyz[1]=t.GetY(); xyz[2]=t.GetZ(); |
96 | ers[0]=t.GetSigmaX(); ers[1]=t.GetSigmaY(); ers[2]=t.GetSigmaZ(); | |
97 | SetVertex(xyz,ers); | |
98 | ||
e50912db | 99 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=t.fLayersNotToSkip[i]; |
6c94f330 | 100 | |
101 | } | |
102 | ||
1f3e997f | 103 | AliITStrackerV2::AliITStrackerV2(const Char_t *geom) : |
6c94f330 | 104 | AliTracker(), |
e50912db | 105 | fI(AliITSgeomTGeo::GetNLayers()), |
6c94f330 | 106 | fBestTrack(), |
107 | fTrackToFollow(), | |
108 | fPass(0), | |
e50912db | 109 | fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()) |
6c94f330 | 110 | { |
006b5f7f | 111 | //-------------------------------------------------------------------- |
61ab8ea8 | 112 | //This is the AliITStrackerV2 constructor |
006b5f7f | 113 | //-------------------------------------------------------------------- |
e341247d | 114 | if (geom) { |
115 | AliWarning("\"geom\" is actually a dummy argument !"); | |
116 | } | |
006b5f7f | 117 | |
e50912db | 118 | for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) { |
e341247d | 119 | Int_t nlad=AliITSgeomTGeo::GetNLadders(i); |
120 | Int_t ndet=AliITSgeomTGeo::GetNDetectors(i); | |
006b5f7f | 121 | |
e341247d | 122 | Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2]; |
123 | AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz); | |
006b5f7f | 124 | Double_t poff=TMath::ATan2(y,x); |
125 | Double_t zoff=z; | |
a504d56f | 126 | Double_t r=TMath::Sqrt(x*x + y*y); |
006b5f7f | 127 | |
e341247d | 128 | AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz); |
006b5f7f | 129 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 130 | AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz); |
006b5f7f | 131 | r += TMath::Sqrt(x*x + y*y); |
e341247d | 132 | AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz); |
006b5f7f | 133 | r += TMath::Sqrt(x*x + y*y); |
134 | r*=0.25; | |
135 | ||
18856a77 | 136 | new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); |
006b5f7f | 137 | |
138 | for (Int_t j=1; j<nlad+1; j++) { | |
139 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
e341247d | 140 | TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m); |
1f3e997f | 141 | const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k); |
142 | m.Multiply(tm); | |
143 | Double_t txyz[3]={0.}, xyz[3]={0.}; | |
144 | m.LocalToMaster(txyz,xyz); | |
145 | Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); | |
146 | Double_t phi=TMath::ATan2(xyz[1],xyz[0]); | |
c219fd63 | 147 | |
148 | if (phi<0) phi+=TMath::TwoPi(); | |
149 | else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi(); | |
150 | ||
18856a77 | 151 | AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1); |
006b5f7f | 152 | new(&det) AliITSdetector(r,phi); |
153 | } | |
154 | } | |
c630aafd | 155 | |
006b5f7f | 156 | } |
157 | ||
c219fd63 | 158 | fConstraint[0]=1; fConstraint[1]=0; |
8676d691 | 159 | |
44347160 | 160 | Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(), |
161 | AliITSReconstructor::GetRecoParam()->GetYVdef(), | |
162 | AliITSReconstructor::GetRecoParam()->GetZVdef()}; | |
163 | Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(), | |
164 | AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(), | |
165 | AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()}; | |
8676d691 | 166 | SetVertex(xyz,ers); |
c0dd5278 | 167 | |
e50912db | 168 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i); |
c0dd5278 | 169 | |
170 | } | |
171 | ||
172 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
173 | //-------------------------------------------------------------------- | |
174 | //This function set masks of the layers which must be not skipped | |
175 | //-------------------------------------------------------------------- | |
e50912db | 176 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i]; |
61ab8ea8 | 177 | } |
006b5f7f | 178 | |
c630aafd | 179 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 180 | //-------------------------------------------------------------------- |
181 | //This function loads ITS clusters | |
182 | //-------------------------------------------------------------------- | |
00a7cc50 | 183 | TBranch *branch=cTree->GetBranch("ITSRecPoints"); |
61ab8ea8 | 184 | if (!branch) { |
c630aafd | 185 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 186 | return 1; |
61ab8ea8 | 187 | } |
006b5f7f | 188 | |
00a7cc50 | 189 | TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy; |
61ab8ea8 | 190 | branch->SetAddress(&clusters); |
006b5f7f | 191 | |
61ab8ea8 | 192 | Int_t j=0; |
e50912db | 193 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) { |
18856a77 | 194 | Int_t ndet=fgLayers[i].GetNdetectors(); |
195 | Int_t jmax = j + fgLayers[i].GetNladders()*ndet; | |
c219fd63 | 196 | |
197 | Double_t r=fgLayers[i].GetR(); | |
198 | Double_t circ=TMath::TwoPi()*r; | |
199 | ||
61ab8ea8 | 200 | for (; j<jmax; j++) { |
201 | if (!cTree->GetEvent(j)) continue; | |
202 | Int_t ncl=clusters->GetEntriesFast(); | |
1f3e997f | 203 | |
61ab8ea8 | 204 | while (ncl--) { |
00a7cc50 | 205 | AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl); |
c219fd63 | 206 | |
75fb37cc | 207 | if (!c->Misalign()) AliWarning("Can't misalign this cluster !"); |
1f3e997f | 208 | |
c219fd63 | 209 | Int_t idx=c->GetDetectorIndex(); |
a504d56f | 210 | AliITSdetector &det=fgLayers[i].GetDetector(idx); |
211 | ||
a504d56f | 212 | Double_t y=r*det.GetPhi()+c->GetY(); |
c219fd63 | 213 | if (y>circ) y-=circ; else if (y<0) y+=circ; |
214 | c->SetPhiR(y); | |
215 | ||
00a7cc50 | 216 | fgLayers[i].InsertCluster(new AliITSRecPoint(*c)); |
61ab8ea8 | 217 | } |
218 | clusters->Delete(); | |
219 | } | |
18856a77 | 220 | fgLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 221 | } |
c630aafd | 222 | |
8676d691 | 223 | return 0; |
61ab8ea8 | 224 | } |
006b5f7f | 225 | |
61ab8ea8 | 226 | void AliITStrackerV2::UnloadClusters() { |
227 | //-------------------------------------------------------------------- | |
228 | //This function unloads ITS clusters | |
229 | //-------------------------------------------------------------------- | |
e50912db | 230 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters(); |
006b5f7f | 231 | } |
232 | ||
880f41b9 | 233 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
234 | //-------------------------------------------------------------------- | |
235 | // Correction for the material between the TPC and the ITS | |
236 | // (should it belong to the TPC code ?) | |
237 | //-------------------------------------------------------------------- | |
238 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
239 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
240 | Double_t yr=12.8, dr=0.03; // rods ? | |
241 | Double_t zm=0.2, dm=0.40; // membrane | |
242 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
243 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
244 | ||
245 | if (t->GetX() > riw) { | |
246 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
247 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
248 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
249 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
250 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
251 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
252 | if (!t->PropagateTo(rs,ds)) return 1; | |
253 | } else if (t->GetX() < rs) { | |
254 | if (!t->PropagateTo(rs,-ds)) return 1; | |
255 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
256 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
257 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
ba1a3e1a | 258 | if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1; |
880f41b9 | 259 | } else { |
260 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
261 | return 1; | |
262 | } | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
af885e0f | 267 | Int_t AliITStrackerV2::Clusters2Tracks(AliESDEvent *event) { |
006b5f7f | 268 | //-------------------------------------------------------------------- |
c630aafd | 269 | // This functions reconstructs ITS tracks |
270 | // The clusters must be already loaded ! | |
006b5f7f | 271 | //-------------------------------------------------------------------- |
c630aafd | 272 | TObjArray itsTracks(15000); |
006b5f7f | 273 | |
c630aafd | 274 | {/* Read ESD tracks */ |
275 | Int_t nentr=event->GetNumberOfTracks(); | |
276 | Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr); | |
277 | while (nentr--) { | |
278 | AliESDtrack *esd=event->GetTrack(nentr); | |
279 | ||
ba1a3e1a | 280 | if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue; |
281 | if (esd->GetStatus()&AliESDtrack::kTPCout) continue; | |
282 | if (esd->GetStatus()&AliESDtrack::kITSin) continue; | |
c630aafd | 283 | |
284 | AliITStrackV2 *t=0; | |
285 | try { | |
286 | t=new AliITStrackV2(*esd); | |
287 | } catch (const Char_t *msg) { | |
288 | Warning("Clusters2Tracks",msg); | |
289 | delete t; | |
290 | continue; | |
291 | } | |
6c94f330 | 292 | if (TMath::Abs(t->GetD(GetX(),GetY()))>4) { |
ebd8369c | 293 | delete t; |
294 | continue; | |
295 | } | |
006b5f7f | 296 | |
c630aafd | 297 | if (CorrectForDeadZoneMaterial(t)!=0) { |
298 | Warning("Clusters2Tracks", | |
299 | "failed to correct for the material in the dead zone !\n"); | |
300 | delete t; | |
301 | continue; | |
302 | } | |
303 | itsTracks.AddLast(t); | |
304 | } | |
305 | } /* End Read ESD tracks */ | |
306 | ||
307 | itsTracks.Sort(); | |
308 | Int_t nentr=itsTracks.GetEntriesFast(); | |
15dd636f | 309 | |
c630aafd | 310 | Int_t ntrk=0; |
311 | for (fPass=0; fPass<2; fPass++) { | |
312 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
313 | for (Int_t i=0; i<nentr; i++) { | |
314 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
15dd636f | 315 | if (t==0) continue; //this track has been already tracked |
c630aafd | 316 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label |
317 | ||
318 | ResetTrackToFollow(*t); | |
319 | ResetBestTrack(); | |
320 | ||
e50912db | 321 | for (FollowProlongation(); fI<AliITSgeomTGeo::GetNLayers(); fI++) { |
15dd636f | 322 | while (TakeNextProlongation()) FollowProlongation(); |
c630aafd | 323 | } |
324 | ||
de5d3595 | 325 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
15dd636f | 326 | |
c630aafd | 327 | if (fConstraint[fPass]) { |
15dd636f | 328 | ResetTrackToFollow(*t); |
329 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
330 | ResetBestTrack(); | |
331 | } | |
332 | ||
c630aafd | 333 | fBestTrack.SetLabel(tpcLabel); |
334 | fBestTrack.CookdEdx(); | |
335 | CookLabel(&fBestTrack,0.); //For comparison only | |
336 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
15dd636f | 337 | UseClusters(&fBestTrack); |
c630aafd | 338 | delete itsTracks.RemoveAt(i); |
339 | ntrk++; | |
340 | } | |
341 | } | |
babd135a | 342 | |
c630aafd | 343 | itsTracks.Delete(); |
2257f27e | 344 | |
c630aafd | 345 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
af885e0f | 350 | Int_t AliITStrackerV2::PropagateBack(AliESDEvent *event) { |
c630aafd | 351 | //-------------------------------------------------------------------- |
352 | // This functions propagates reconstructed ITS tracks back | |
353 | // The clusters must be loaded ! | |
354 | //-------------------------------------------------------------------- | |
355 | Int_t nentr=event->GetNumberOfTracks(); | |
356 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
357 | ||
358 | Int_t ntrk=0; | |
359 | for (Int_t i=0; i<nentr; i++) { | |
360 | AliESDtrack *esd=event->GetTrack(i); | |
361 | ||
ba1a3e1a | 362 | if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue; |
363 | if (esd->GetStatus()&AliESDtrack::kITSout) continue; | |
c630aafd | 364 | |
365 | AliITStrackV2 *t=0; | |
366 | try { | |
367 | t=new AliITStrackV2(*esd); | |
368 | } catch (const Char_t *msg) { | |
369 | Warning("PropagateBack",msg); | |
370 | delete t; | |
371 | continue; | |
372 | } | |
373 | ||
374 | ResetTrackToFollow(*t); | |
375 | ||
376 | // propagete to vertex [SR, GSI 17.02.2003] | |
a9459f9c | 377 | // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov |
378 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) { | |
6c94f330 | 379 | if (fTrackToFollow.PropagateToVertex(event->GetVertex())) { |
a9459f9c | 380 | fTrackToFollow.StartTimeIntegral(); |
381 | } | |
382 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
383 | } | |
c630aafd | 384 | |
6c94f330 | 385 | fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters(); |
c630aafd | 386 | if (RefitAt(49.,&fTrackToFollow,t)) { |
387 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
388 | Warning("PropagateBack", | |
389 | "failed to correct for the material in the dead zone !\n"); | |
390 | delete t; | |
391 | continue; | |
392 | } | |
393 | fTrackToFollow.SetLabel(t->GetLabel()); | |
ba1a3e1a | 394 | //fTrackToFollow.CookdEdx(); |
c630aafd | 395 | CookLabel(&fTrackToFollow,0.); //For comparison only |
396 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
15dd636f | 397 | UseClusters(&fTrackToFollow); |
c630aafd | 398 | ntrk++; |
399 | } | |
400 | delete t; | |
401 | } | |
402 | ||
403 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 404 | |
83d73500 | 405 | return 0; |
406 | } | |
407 | ||
af885e0f | 408 | Int_t AliITStrackerV2::RefitInward(AliESDEvent *event) { |
83d73500 | 409 | //-------------------------------------------------------------------- |
410 | // This functions refits ITS tracks using the | |
411 | // "inward propagated" TPC tracks | |
c630aafd | 412 | // The clusters must be loaded ! |
83d73500 | 413 | //-------------------------------------------------------------------- |
c630aafd | 414 | Int_t nentr=event->GetNumberOfTracks(); |
415 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
416 | ||
417 | Int_t ntrk=0; | |
418 | for (Int_t i=0; i<nentr; i++) { | |
419 | AliESDtrack *esd=event->GetTrack(i); | |
420 | ||
ba1a3e1a | 421 | if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue; |
422 | if (esd->GetStatus()&AliESDtrack::kITSrefit) continue; | |
423 | if (esd->GetStatus()&AliESDtrack::kTPCout) | |
15dd636f | 424 | if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue; |
c630aafd | 425 | |
426 | AliITStrackV2 *t=0; | |
427 | try { | |
428 | t=new AliITStrackV2(*esd); | |
429 | } catch (const Char_t *msg) { | |
430 | Warning("RefitInward",msg); | |
431 | delete t; | |
432 | continue; | |
433 | } | |
434 | ||
435 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
436 | Warning("RefitInward", | |
437 | "failed to correct for the material in the dead zone !\n"); | |
438 | delete t; | |
439 | continue; | |
440 | } | |
441 | ||
442 | ResetTrackToFollow(*t); | |
443 | fTrackToFollow.ResetClusters(); | |
444 | ||
445 | //Refitting... | |
ef7253ac | 446 | if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) { |
c630aafd | 447 | fTrackToFollow.SetLabel(t->GetLabel()); |
448 | fTrackToFollow.CookdEdx(); | |
15dd636f | 449 | CookLabel(&fTrackToFollow,0.); //For comparison only |
18856a77 | 450 | |
49d13e89 | 451 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe |
452 | AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack(); | |
453 | esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); | |
454 | Float_t r[3]={0.,0.,0.}; | |
455 | Double_t maxD=3.; | |
456 | esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD); | |
457 | ntrk++; | |
67c3dcbe | 458 | } |
c630aafd | 459 | } |
460 | delete t; | |
461 | } | |
462 | ||
463 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 464 | |
c630aafd | 465 | return 0; |
466 | } | |
83d73500 | 467 | |
006b5f7f | 468 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { |
469 | //-------------------------------------------------------------------- | |
470 | // Return pointer to a given cluster | |
471 | //-------------------------------------------------------------------- | |
472 | Int_t l=(index & 0xf0000000) >> 28; | |
473 | Int_t c=(index & 0x0fffffff) >> 00; | |
18856a77 | 474 | return fgLayers[l].GetCluster(c); |
006b5f7f | 475 | } |
476 | ||
477 | ||
478 | void AliITStrackerV2::FollowProlongation() { | |
479 | //-------------------------------------------------------------------- | |
480 | //This function finds a track prolongation | |
481 | //-------------------------------------------------------------------- | |
c0dd5278 | 482 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 483 | Int_t i=fI-1; |
8676d691 | 484 | |
18856a77 | 485 | AliITSlayer &layer=fgLayers[i]; |
a9a2d814 | 486 | AliITStrackV2 &track=fTracks[i]; |
006b5f7f | 487 | |
14825d5a | 488 | Double_t r=layer.GetR(); |
61ab8ea8 | 489 | |
a9a2d814 | 490 | if (i==3 || i==1) { |
18856a77 | 491 | Double_t rs=0.5*(fgLayers[i+1].GetR() + r); |
61ab8ea8 | 492 | Double_t d=0.0034, x0=38.6; |
493 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
494 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 495 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 496 | return; |
a9a2d814 | 497 | } |
006b5f7f | 498 | } |
499 | ||
500 | //find intersection | |
8602c008 | 501 | Double_t phi,z; |
502 | if (!fTrackToFollow.GetPhiZat(r,phi,z)) { | |
8676d691 | 503 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 504 | return; |
006b5f7f | 505 | } |
f363d377 | 506 | |
006b5f7f | 507 | Int_t idet=layer.FindDetectorIndex(phi,z); |
508 | if (idet<0) { | |
8676d691 | 509 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 510 | return; |
006b5f7f | 511 | } |
512 | ||
513 | //propagate to the intersection | |
514 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 515 | phi=det.GetPhi(); |
a9a2d814 | 516 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 517 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 518 | return; |
006b5f7f | 519 | } |
520 | fTrackToFollow.SetDetectorIndex(idet); | |
521 | ||
522 | //Select possible prolongations and store the current track estimation | |
523 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
44347160 | 524 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
525 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); | |
8676d691 | 526 | Double_t road=layer.GetRoad(); |
527 | if (dz*dy>road*road) { | |
528 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
529 | dz=road*scz; dy=road*scy; | |
530 | } | |
b87bd7cd | 531 | |
44347160 | 532 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
14825d5a | 533 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
44347160 | 534 | if (dz > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) { |
8676d691 | 535 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 536 | return; |
006b5f7f | 537 | } |
a9a2d814 | 538 | |
15dd636f | 539 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 540 | |
44347160 | 541 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); |
14825d5a | 542 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
44347160 | 543 | if (dy > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) { |
8676d691 | 544 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 545 | return; |
006b5f7f | 546 | } |
a9a2d814 | 547 | |
c219fd63 | 548 | fI--; |
549 | ||
7f6ddf58 | 550 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 551 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 552 | Double_t ymin=track.GetY() + r*phi - dy; |
553 | Double_t ymax=track.GetY() + r*phi + dy; | |
c219fd63 | 554 | if (layer.SelectClusters(zmin,zmax,ymin,ymax)==0) |
555 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 556 | |
15dd636f | 557 | if (!TakeNextProlongation()) |
558 | if (fLayersNotToSkip[fI]) return; | |
559 | ||
006b5f7f | 560 | } |
561 | ||
562 | //deal with the best track | |
563 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
564 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
15dd636f | 565 | if (ncl) |
566 | if (ncl >= nclb) { | |
567 | Double_t chi2=fTrackToFollow.GetChi2(); | |
44347160 | 568 | if (chi2/ncl < AliITSReconstructor::GetRecoParam()->GetChi2PerCluster()) { |
15dd636f | 569 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { |
570 | ResetBestTrack(); | |
006b5f7f | 571 | } |
15dd636f | 572 | } |
006b5f7f | 573 | } |
15dd636f | 574 | |
006b5f7f | 575 | } |
576 | ||
006b5f7f | 577 | Int_t AliITStrackerV2::TakeNextProlongation() { |
578 | //-------------------------------------------------------------------- | |
a9a2d814 | 579 | // This function takes another track prolongation |
580 | // | |
581 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 582 | //-------------------------------------------------------------------- |
18856a77 | 583 | AliITSlayer &layer=fgLayers[fI]; |
4ab260d6 | 584 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 585 | |
44347160 | 586 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(fI)); |
587 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(fI)); | |
8676d691 | 588 | Double_t road=layer.GetRoad(); |
589 | if (dz*dy>road*road) { | |
590 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
591 | dz=road*scz; dy=road*scy; | |
592 | } | |
006b5f7f | 593 | |
00a7cc50 | 594 | const AliITSRecPoint *c=0; Int_t ci=-1; |
595 | const AliITSRecPoint *cc=0; Int_t cci=-1; | |
44347160 | 596 | Double_t chi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); |
006b5f7f | 597 | while ((c=layer.GetNextCluster(ci))!=0) { |
006b5f7f | 598 | Int_t idet=c->GetDetectorIndex(); |
15dd636f | 599 | |
4ab260d6 | 600 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 601 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 602 | ResetTrackToFollow(fTracks[fI]); |
603 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 604 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 605 | continue; |
606 | } | |
4ab260d6 | 607 | fTrackToFollow.SetDetectorIndex(idet); |
608 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 609 | } |
610 | ||
4ab260d6 | 611 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
612 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 613 | |
c219fd63 | 614 | Double_t ch2=fTrackToFollow.GetPredictedChi2(c); |
615 | if (ch2 > chi2) continue; | |
616 | chi2=ch2; | |
617 | cc=c; cci=ci; | |
618 | break; | |
006b5f7f | 619 | } |
620 | ||
c219fd63 | 621 | if (!cc) return 0; |
006b5f7f | 622 | |
1f3e997f | 623 | {// Take into account the mis-alignment |
624 | Double_t x = fTrackToFollow.GetX() + cc->GetX(); | |
625 | if (!fTrackToFollow.PropagateTo(x,0.,0.)) return 0; | |
626 | } | |
c219fd63 | 627 | if (!fTrackToFollow.Update(cc,chi2,(fI<<28)+cci)) { |
8676d691 | 628 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 629 | return 0; |
630 | } | |
15dd636f | 631 | |
4ab260d6 | 632 | if (fTrackToFollow.GetNumberOfClusters()>1) |
6c94f330 | 633 | if (TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()))>4) return 0; |
4ab260d6 | 634 | |
a9a2d814 | 635 | fTrackToFollow. |
c219fd63 | 636 | SetSampledEdx(cc->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. |
a9a2d814 | 637 | |
638 | { | |
880f41b9 | 639 | Double_t x0; |
61ab8ea8 | 640 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 641 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 642 | } |
4ab260d6 | 643 | |
a9a2d814 | 644 | if (fConstraint[fPass]) { |
4ab260d6 | 645 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 646 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
647 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
648 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 649 | } |
006b5f7f | 650 | |
006b5f7f | 651 | return 1; |
652 | } | |
653 | ||
654 | ||
6c94f330 | 655 | AliITStrackerV2::AliITSlayer::AliITSlayer(): |
656 | fR(0.), | |
657 | fPhiOffset(0.), | |
658 | fNladders(0), | |
659 | fZOffset(0.), | |
660 | fNdetectors(0), | |
661 | fDetectors(0), | |
662 | fNsel(0), | |
663 | fRoad(2*fR*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
664 | { | |
006b5f7f | 665 | //-------------------------------------------------------------------- |
666 | //default AliITSlayer constructor | |
667 | //-------------------------------------------------------------------- | |
c219fd63 | 668 | |
669 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; | |
c219fd63 | 670 | |
006b5f7f | 671 | } |
672 | ||
673 | AliITStrackerV2::AliITSlayer:: | |
6c94f330 | 674 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd): |
675 | fR(r), | |
676 | fPhiOffset(p), | |
677 | fNladders(nl), | |
678 | fZOffset(z), | |
679 | fNdetectors(nd), | |
680 | fDetectors(new AliITSdetector[nl*nd]), | |
681 | fNsel(0), | |
682 | fRoad(2*r*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
683 | { | |
006b5f7f | 684 | //-------------------------------------------------------------------- |
685 | //main AliITSlayer constructor | |
686 | //-------------------------------------------------------------------- | |
006b5f7f | 687 | |
c219fd63 | 688 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; |
c219fd63 | 689 | |
e50912db | 690 | for (Int_t i=0; i<AliITSRecoParam::fgkMaxClusterPerLayer; i++) fClusters[i]=0; |
b87bd7cd | 691 | |
006b5f7f | 692 | } |
693 | ||
694 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
695 | //-------------------------------------------------------------------- | |
696 | // AliITSlayer destructor | |
697 | //-------------------------------------------------------------------- | |
698 | delete[] fDetectors; | |
c219fd63 | 699 | ResetClusters(); |
006b5f7f | 700 | } |
701 | ||
61ab8ea8 | 702 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
703 | //-------------------------------------------------------------------- | |
704 | // This function removes loaded clusters | |
705 | //-------------------------------------------------------------------- | |
c219fd63 | 706 | for (Int_t s=0; s<kNsector; s++) { |
707 | Int_t &n=fN[s]; | |
708 | while (n) { | |
709 | n--; | |
710 | delete fClusters[s*kMaxClusterPerSector+n]; | |
711 | } | |
712 | } | |
61ab8ea8 | 713 | } |
714 | ||
b87bd7cd | 715 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
716 | //-------------------------------------------------------------------- | |
717 | // This function calculates the road defined by the cluster density | |
718 | //-------------------------------------------------------------------- | |
719 | Int_t n=0; | |
c219fd63 | 720 | for (Int_t s=0; s<kNsector; s++) { |
721 | Int_t i=fN[s]; | |
722 | while (i--) | |
723 | if (TMath::Abs(fClusters[s*kMaxClusterPerSector+i]->GetZ())<fR) n++; | |
b87bd7cd | 724 | } |
725 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
726 | } | |
727 | ||
00a7cc50 | 728 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSRecPoint *c) { |
006b5f7f | 729 | //-------------------------------------------------------------------- |
c219fd63 | 730 | // This function inserts a cluster to this layer in increasing |
731 | // order of the cluster's fZ | |
006b5f7f | 732 | //-------------------------------------------------------------------- |
c219fd63 | 733 | Float_t circ=TMath::TwoPi()*fR; |
734 | Int_t sec=Int_t(kNsector*c->GetPhiR()/circ); | |
81e97e0d | 735 | if (sec>=kNsector) { |
736 | ::Error("InsertCluster","Wrong sector !\n"); | |
737 | return 1; | |
738 | } | |
c219fd63 | 739 | Int_t &n=fN[sec]; |
740 | if (n>=kMaxClusterPerSector) { | |
741 | ::Error("InsertCluster","Too many clusters !\n"); | |
742 | return 1; | |
006b5f7f | 743 | } |
c219fd63 | 744 | if (n==0) fClusters[sec*kMaxClusterPerSector]=c; |
745 | else { | |
746 | Int_t i=FindClusterIndex(c->GetZ(),sec); | |
747 | Int_t k=n-i+sec*kMaxClusterPerSector; | |
00a7cc50 | 748 | memmove(fClusters+i+1 ,fClusters+i,k*sizeof(AliITSRecPoint*)); |
c219fd63 | 749 | fClusters[i]=c; |
750 | } | |
751 | n++; | |
006b5f7f | 752 | return 0; |
753 | } | |
754 | ||
c219fd63 | 755 | Int_t |
756 | AliITStrackerV2::AliITSlayer::FindClusterIndex(Float_t z,Int_t s) const { | |
006b5f7f | 757 | //-------------------------------------------------------------------- |
c219fd63 | 758 | // For the sector "s", this function returns the index of the first |
759 | // with its fZ >= "z". | |
006b5f7f | 760 | //-------------------------------------------------------------------- |
c219fd63 | 761 | Int_t nc=fN[s]; |
762 | if (nc==0) return kMaxClusterPerSector*s; | |
763 | ||
764 | Int_t b=kMaxClusterPerSector*s; | |
765 | if (z <= fClusters[b]->GetZ()) return b; | |
766 | ||
767 | Int_t e=b+nc-1; | |
768 | if (z > fClusters[e]->GetZ()) return e+1; | |
769 | ||
770 | Int_t m=(b+e)/2; | |
006b5f7f | 771 | for (; b<e; m=(b+e)/2) { |
772 | if (z > fClusters[m]->GetZ()) b=m+1; | |
773 | else e=m; | |
774 | } | |
775 | return m; | |
776 | } | |
777 | ||
c219fd63 | 778 | Int_t AliITStrackerV2::AliITSlayer:: |
779 | SelectClusters(Float_t zmin,Float_t zmax,Float_t ymin, Float_t ymax) { | |
006b5f7f | 780 | //-------------------------------------------------------------------- |
c219fd63 | 781 | // This function selects clusters within the "window" |
006b5f7f | 782 | //-------------------------------------------------------------------- |
c219fd63 | 783 | Float_t circ=fR*TMath::TwoPi(); |
784 | ||
785 | if (ymin>circ) ymin-=circ; else if (ymin<0) ymin+=circ; | |
786 | if (ymax>circ) ymax-=circ; else if (ymax<0) ymax+=circ; | |
787 | ||
521f4796 | 788 | Int_t i1=Int_t(kNsector*ymin/circ); if (i1==kNsector) i1--; |
c219fd63 | 789 | if (fN[i1]!=0) { |
790 | Float_t ym = (ymax<ymin) ? ymax+circ : ymax; | |
791 | Int_t i=FindClusterIndex(zmin,i1), imax=i1*kMaxClusterPerSector+fN[i1]; | |
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()<=ymin) continue; | |
797 | if (c->GetPhiR()>ym) continue; | |
798 | fIndex[fNsel++]=i; | |
799 | } | |
800 | } | |
801 | ||
521f4796 | 802 | Int_t i2=Int_t(kNsector*ymax/circ); if (i2==kNsector) i2--; |
c219fd63 | 803 | if (i2==i1) return fNsel; |
804 | ||
805 | if (fN[i2]!=0) { | |
806 | Float_t ym = (ymin>ymax) ? ymin-circ : ymin; | |
807 | Int_t i=FindClusterIndex(zmin,i2), imax=i2*kMaxClusterPerSector+fN[i2]; | |
808 | for (; i<imax; i++) { | |
00a7cc50 | 809 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 810 | if (c->IsUsed()) continue; |
811 | if (c->GetZ()>zmax) break; | |
812 | if (c->GetPhiR()<=ym) continue; | |
813 | if (c->GetPhiR()>ymax) continue; | |
814 | fIndex[fNsel++]=i; | |
815 | } | |
816 | } | |
817 | ||
818 | return fNsel; | |
006b5f7f | 819 | } |
820 | ||
00a7cc50 | 821 | const AliITSRecPoint *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ |
006b5f7f | 822 | //-------------------------------------------------------------------- |
823 | // This function returns clusters within the "window" | |
824 | //-------------------------------------------------------------------- | |
00a7cc50 | 825 | AliITSRecPoint *c=0; |
c219fd63 | 826 | ci=-1; |
827 | if (fNsel) { | |
828 | fNsel--; | |
829 | ci=fIndex[fNsel]; | |
830 | c=fClusters[ci]; | |
006b5f7f | 831 | } |
c219fd63 | 832 | return c; |
833 | } | |
7f6ddf58 | 834 | |
c219fd63 | 835 | Int_t AliITStrackerV2::AliITSlayer::GetNumberOfClusters() const { |
836 | Int_t n=0; | |
837 | for (Int_t s=0; s<kNsector; s++) n+=fN[s]; | |
838 | return n; | |
006b5f7f | 839 | } |
840 | ||
c219fd63 | 841 | Int_t |
842 | AliITStrackerV2::AliITSlayer::FindDetectorIndex(Double_t phi,Double_t z)const { | |
006b5f7f | 843 | //-------------------------------------------------------------------- |
844 | //This function finds the detector crossed by the track | |
845 | //-------------------------------------------------------------------- | |
31fb8575 | 846 | Double_t dphi; |
847 | if (fZOffset<0) // old geometry | |
848 | dphi = -(phi-fPhiOffset); | |
849 | else // new geometry | |
850 | dphi = phi-fPhiOffset; | |
851 | ||
006b5f7f | 852 | if (dphi < 0) dphi += 2*TMath::Pi(); |
853 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
854 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 855 | if (np>=fNladders) np-=fNladders; |
856 | if (np<0) np+=fNladders; | |
006b5f7f | 857 | |
858 | Double_t dz=fZOffset-z; | |
859 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 860 | if (nz>=fNdetectors) return -1; |
861 | if (nz<0) return -1; | |
006b5f7f | 862 | |
006b5f7f | 863 | return np*fNdetectors + nz; |
864 | } | |
865 | ||
866 | Double_t | |
61ab8ea8 | 867 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
868 | const { | |
a9a2d814 | 869 | //-------------------------------------------------------------------- |
870 | //This function returns the layer thickness at this point (units X0) | |
871 | //-------------------------------------------------------------------- | |
872 | Double_t d=0.0085; | |
61ab8ea8 | 873 | x0=21.82; |
a9a2d814 | 874 | |
875 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 876 | Double_t dd=0.0034; |
877 | d=dd; | |
878 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
879 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
880 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 881 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 882 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
883 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
884 | d+=0.0034; | |
885 | break; | |
886 | } | |
887 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
888 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
889 | d+=0.0034; | |
890 | break; | |
891 | } | |
892 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
893 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 894 | } |
895 | } else | |
896 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 897 | Double_t dd=0.0034; |
898 | d=dd; | |
899 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
900 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
901 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 902 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 903 | if (TMath::Abs(z-3.9*i)<0.15) { |
904 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
905 | d+=dd; | |
906 | break; | |
907 | } | |
908 | if (TMath::Abs(z+3.9*i)<0.15) { | |
909 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
910 | d+=dd; | |
911 | break; | |
912 | } | |
913 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
914 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 915 | } |
916 | } else | |
917 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 918 | Double_t dd=0.0033; |
919 | d=dd; | |
920 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
921 | ||
922 | if (TMath::Abs(y-1.80)<0.55) { | |
923 | d+=0.016; | |
924 | for (Int_t j=0; j<20; j++) { | |
925 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
926 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
927 | } | |
928 | } | |
929 | if (TMath::Abs(y+1.80)<0.55) { | |
930 | d+=0.016; | |
931 | for (Int_t j=0; j<20; j++) { | |
932 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
933 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
934 | } | |
935 | } | |
936 | ||
937 | for (Int_t i=0; i<4; i++) { | |
938 | if (TMath::Abs(z-7.3*i)<0.60) { | |
939 | d+=dd; | |
940 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
941 | break; | |
942 | } | |
943 | if (TMath::Abs(z+7.3*i)<0.60) { | |
944 | d+=dd; | |
945 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
946 | break; | |
947 | } | |
a9a2d814 | 948 | } |
949 | } else | |
950 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 951 | Double_t dd=0.0063; x0=21.5; |
952 | d=dd; | |
953 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
954 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
955 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 956 | } else |
957 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 958 | Double_t dd=0.0063; x0=21.5; |
959 | d=dd; | |
960 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
961 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
962 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 963 | } |
964 | ||
a9a2d814 | 965 | return d; |
966 | } | |
006b5f7f | 967 | |
a9a2d814 | 968 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 969 | { |
970 | //-------------------------------------------------------------------- | |
a9a2d814 | 971 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 972 | //-------------------------------------------------------------------- |
61ab8ea8 | 973 | Double_t d=0.0028*3*3; //beam pipe |
974 | Double_t x0=0; | |
006b5f7f | 975 | |
18856a77 | 976 | Double_t xn=fgLayers[fI].GetR(); |
006b5f7f | 977 | for (Int_t i=0; i<fI; i++) { |
18856a77 | 978 | Double_t xi=fgLayers[i].GetR(); |
979 | d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi; | |
006b5f7f | 980 | } |
981 | ||
982 | if (fI>1) { | |
61ab8ea8 | 983 | Double_t xi=9.; |
984 | d+=0.0097*xi*xi; | |
006b5f7f | 985 | } |
986 | ||
987 | if (fI>3) { | |
18856a77 | 988 | Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR()); |
61ab8ea8 | 989 | d+=0.0034*xi*xi; |
006b5f7f | 990 | } |
61ab8ea8 | 991 | |
006b5f7f | 992 | return d/(xn*xn); |
993 | } | |
994 | ||
ef7253ac | 995 | Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t, |
996 | const AliITStrackV2 *c, Bool_t extra) { | |
4ab260d6 | 997 | //-------------------------------------------------------------------- |
c630aafd | 998 | // This function refits the track "t" at the position "x" using |
999 | // the clusters from "c" | |
ef7253ac | 1000 | // If "extra"==kTRUE, |
1001 | // the clusters from overlapped modules get attached to "t" | |
4ab260d6 | 1002 | //-------------------------------------------------------------------- |
e50912db | 1003 | Int_t index[AliITSgeomTGeo::kNLayers]; |
880f41b9 | 1004 | Int_t k; |
e50912db | 1005 | for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1; |
c630aafd | 1006 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 1007 | for (k=0; k<nc; k++) { |
c630aafd | 1008 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 1009 | index[nl]=idx; |
1010 | } | |
880f41b9 | 1011 | |
4ab260d6 | 1012 | Int_t from, to, step; |
ee34184f | 1013 | if (xx > t->GetX()) { |
e50912db | 1014 | from=0; to=AliITSgeomTGeo::GetNLayers(); |
4ab260d6 | 1015 | step=+1; |
1016 | } else { | |
e50912db | 1017 | from=AliITSgeomTGeo::GetNLayers()-1; to=-1; |
4ab260d6 | 1018 | step=-1; |
1019 | } | |
1020 | ||
1021 | for (Int_t i=from; i != to; i += step) { | |
18856a77 | 1022 | AliITSlayer &layer=fgLayers[i]; |
4ab260d6 | 1023 | Double_t r=layer.GetR(); |
1024 | ||
1025 | { | |
1026 | Double_t hI=i-0.5*step; | |
880f41b9 | 1027 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
18856a77 | 1028 | Double_t rs=0.5*(fgLayers[i-step].GetR() + r); |
61ab8ea8 | 1029 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1030 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1031 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1032 | return kFALSE; |
1033 | } | |
1034 | } | |
1035 | } | |
1036 | ||
880f41b9 | 1037 | // remember old position [SR, GSI 18.02.2003] |
1038 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1039 | if (t->IsStartedTimeIntegral() && step==1) { | |
1040 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1041 | } | |
1042 | // | |
1043 | ||
8602c008 | 1044 | Double_t phi,z; |
1045 | if (!t->GetPhiZat(r,phi,z)) { | |
4ab260d6 | 1046 | return kFALSE; |
1047 | } | |
8602c008 | 1048 | |
4ab260d6 | 1049 | Int_t idet=layer.FindDetectorIndex(phi,z); |
1050 | if (idet<0) { | |
1051 | return kFALSE; | |
1052 | } | |
1053 | const AliITSdetector &det=layer.GetDetector(idet); | |
1054 | phi=det.GetPhi(); | |
1055 | if (!t->Propagate(phi,det.GetR())) { | |
1056 | return kFALSE; | |
1057 | } | |
1058 | t->SetDetectorIndex(idet); | |
1059 | ||
00a7cc50 | 1060 | const AliITSRecPoint *cl=0; |
44347160 | 1061 | Double_t maxchi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); |
4ab260d6 | 1062 | |
1063 | Int_t idx=index[i]; | |
c0342e67 | 1064 | if (idx>=0) { |
00a7cc50 | 1065 | const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx); |
4ab260d6 | 1066 | if (idet != c->GetDetectorIndex()) { |
1067 | idet=c->GetDetectorIndex(); | |
1068 | const AliITSdetector &det=layer.GetDetector(idet); | |
1069 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1070 | return kFALSE; | |
1071 | } | |
1072 | t->SetDetectorIndex(idet); | |
1073 | } | |
1074 | Double_t chi2=t->GetPredictedChi2(c); | |
c630aafd | 1075 | if (chi2<maxchi2) { |
1076 | cl=c; | |
1077 | maxchi2=chi2; | |
1078 | } else { | |
1079 | return kFALSE; | |
1080 | } | |
4ab260d6 | 1081 | } |
ef7253ac | 1082 | |
4ab260d6 | 1083 | if (cl) { |
1f3e997f | 1084 | // Take into account the mis-alignment |
1085 | Double_t x=t->GetX()+cl->GetX(); | |
1086 | if (!t->PropagateTo(x,0.,0.)) return kFALSE; | |
4ab260d6 | 1087 | if (!t->Update(cl,maxchi2,idx)) { |
1088 | return kFALSE; | |
1089 | } | |
880f41b9 | 1090 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1091 | } |
1092 | ||
1093 | { | |
61ab8ea8 | 1094 | Double_t x0; |
1095 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1096 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1097 | } |
880f41b9 | 1098 | |
ef7253ac | 1099 | if (extra) { //search for extra clusters |
1100 | AliITStrackV2 tmp(*t); | |
44347160 | 1101 | Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
ef7253ac | 1102 | if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl()); |
44347160 | 1103 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); |
ef7253ac | 1104 | if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp()); |
1105 | Double_t zmin=t->GetZ() - dz; | |
1106 | Double_t zmax=t->GetZ() + dz; | |
1107 | Double_t ymin=t->GetY() + phi*r - dy; | |
1108 | Double_t ymax=t->GetY() + phi*r + dy; | |
1109 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1110 | ||
1111 | const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1; | |
44347160 | 1112 | Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(), tolerance=0.1; |
ef7253ac | 1113 | while ((c=layer.GetNextCluster(ci))!=0) { |
1114 | if (idet == c->GetDetectorIndex()) continue; | |
1115 | ||
1116 | const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex()); | |
1117 | ||
1118 | if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue; | |
1119 | ||
1120 | if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue; | |
1121 | if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue; | |
1122 | ||
1123 | Double_t chi2=tmp.GetPredictedChi2(c); | |
1124 | if (chi2<maxchi2) { maxchi2=chi2; cci=ci; } | |
1125 | } | |
1126 | if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci); | |
1127 | } | |
1128 | ||
880f41b9 | 1129 | // track time update [SR, GSI 17.02.2003] |
1130 | if (t->IsStartedTimeIntegral() && step==1) { | |
1131 | Double_t newX, newY, newZ; | |
1132 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1133 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1134 | (oldZ-newZ)*(oldZ-newZ); | |
1135 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1136 | } | |
1137 | // | |
4ab260d6 | 1138 | |
1139 | } | |
1140 | ||
ee34184f | 1141 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1142 | return kTRUE; |
1143 | } | |
1144 | ||
b87bd7cd | 1145 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1146 | //-------------------------------------------------------------------- | |
1147 | // This function marks clusters assigned to the track | |
1148 | //-------------------------------------------------------------------- | |
1149 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1150 | |
5482d29d | 1151 | Int_t clusterIndex = t->GetClusterIndex(0); |
1152 | AliITSRecPoint *c= 0x0; | |
1153 | ||
1154 | if (clusterIndex>-1) | |
1155 | c = (AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1156 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
5482d29d | 1157 | |
1158 | c = 0x0; | |
1159 | clusterIndex = t->GetClusterIndex(1); | |
1160 | if (clusterIndex>-1) | |
1161 | c=(AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1162 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
880f41b9 | 1163 | |
b87bd7cd | 1164 | } |