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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 | **************************************************************************/ | |
a5d0fae6 | 15 | /* $Id$ */ |
006b5f7f | 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); | |
a5d0fae6 | 143 | Double_t txyz[3]={0.}; |
144 | xyz[0]=0.; xyz[1]=0.; xyz[2]=0.; | |
1f3e997f | 145 | m.LocalToMaster(txyz,xyz); |
a5d0fae6 | 146 | r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); |
1f3e997f | 147 | Double_t phi=TMath::ATan2(xyz[1],xyz[0]); |
c219fd63 | 148 | |
149 | if (phi<0) phi+=TMath::TwoPi(); | |
150 | else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi(); | |
151 | ||
18856a77 | 152 | AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1); |
006b5f7f | 153 | new(&det) AliITSdetector(r,phi); |
154 | } | |
155 | } | |
c630aafd | 156 | |
006b5f7f | 157 | } |
158 | ||
c219fd63 | 159 | fConstraint[0]=1; fConstraint[1]=0; |
8676d691 | 160 | |
44347160 | 161 | Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(), |
162 | AliITSReconstructor::GetRecoParam()->GetYVdef(), | |
163 | AliITSReconstructor::GetRecoParam()->GetZVdef()}; | |
164 | Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(), | |
165 | AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(), | |
166 | AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()}; | |
8676d691 | 167 | SetVertex(xyz,ers); |
c0dd5278 | 168 | |
e50912db | 169 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i); |
c0dd5278 | 170 | |
171 | } | |
172 | ||
173 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
174 | //-------------------------------------------------------------------- | |
175 | //This function set masks of the layers which must be not skipped | |
176 | //-------------------------------------------------------------------- | |
e50912db | 177 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i]; |
61ab8ea8 | 178 | } |
006b5f7f | 179 | |
c630aafd | 180 | Int_t AliITStrackerV2::LoadClusters(TTree *cTree) { |
61ab8ea8 | 181 | //-------------------------------------------------------------------- |
182 | //This function loads ITS clusters | |
183 | //-------------------------------------------------------------------- | |
00a7cc50 | 184 | TBranch *branch=cTree->GetBranch("ITSRecPoints"); |
61ab8ea8 | 185 | if (!branch) { |
c630aafd | 186 | Error("LoadClusters"," can't get the branch !\n"); |
8676d691 | 187 | return 1; |
61ab8ea8 | 188 | } |
006b5f7f | 189 | |
00a7cc50 | 190 | TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy; |
61ab8ea8 | 191 | branch->SetAddress(&clusters); |
006b5f7f | 192 | |
61ab8ea8 | 193 | Int_t j=0; |
e50912db | 194 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) { |
18856a77 | 195 | Int_t ndet=fgLayers[i].GetNdetectors(); |
196 | Int_t jmax = j + fgLayers[i].GetNladders()*ndet; | |
c219fd63 | 197 | |
198 | Double_t r=fgLayers[i].GetR(); | |
199 | Double_t circ=TMath::TwoPi()*r; | |
200 | ||
61ab8ea8 | 201 | for (; j<jmax; j++) { |
202 | if (!cTree->GetEvent(j)) continue; | |
203 | Int_t ncl=clusters->GetEntriesFast(); | |
1f3e997f | 204 | |
61ab8ea8 | 205 | while (ncl--) { |
00a7cc50 | 206 | AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl); |
c219fd63 | 207 | |
75fb37cc | 208 | if (!c->Misalign()) AliWarning("Can't misalign this cluster !"); |
1f3e997f | 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 | //-------------------------------------------------------------------- | |
e50912db | 231 | for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); 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 | ||
af885e0f | 268 | Int_t AliITStrackerV2::Clusters2Tracks(AliESDEvent *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 | |
763bdf3e | 285 | AliITStrackV2 *t = new AliITStrackV2(*esd); |
286 | ||
6c94f330 | 287 | if (TMath::Abs(t->GetD(GetX(),GetY()))>4) { |
ebd8369c | 288 | delete t; |
289 | continue; | |
290 | } | |
006b5f7f | 291 | |
c630aafd | 292 | if (CorrectForDeadZoneMaterial(t)!=0) { |
293 | Warning("Clusters2Tracks", | |
294 | "failed to correct for the material in the dead zone !\n"); | |
295 | delete t; | |
296 | continue; | |
297 | } | |
298 | itsTracks.AddLast(t); | |
299 | } | |
300 | } /* End Read ESD tracks */ | |
301 | ||
302 | itsTracks.Sort(); | |
303 | Int_t nentr=itsTracks.GetEntriesFast(); | |
15dd636f | 304 | |
c630aafd | 305 | Int_t ntrk=0; |
306 | for (fPass=0; fPass<2; fPass++) { | |
307 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
308 | for (Int_t i=0; i<nentr; i++) { | |
309 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); | |
15dd636f | 310 | if (t==0) continue; //this track has been already tracked |
c630aafd | 311 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label |
312 | ||
313 | ResetTrackToFollow(*t); | |
314 | ResetBestTrack(); | |
315 | ||
e50912db | 316 | for (FollowProlongation(); fI<AliITSgeomTGeo::GetNLayers(); fI++) { |
15dd636f | 317 | while (TakeNextProlongation()) FollowProlongation(); |
c630aafd | 318 | } |
319 | ||
de5d3595 | 320 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
15dd636f | 321 | |
c630aafd | 322 | if (fConstraint[fPass]) { |
15dd636f | 323 | ResetTrackToFollow(*t); |
324 | if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue; | |
325 | ResetBestTrack(); | |
326 | } | |
327 | ||
c630aafd | 328 | fBestTrack.SetLabel(tpcLabel); |
329 | fBestTrack.CookdEdx(); | |
330 | CookLabel(&fBestTrack,0.); //For comparison only | |
331 | fBestTrack.UpdateESDtrack(AliESDtrack::kITSin); | |
15dd636f | 332 | UseClusters(&fBestTrack); |
c630aafd | 333 | delete itsTracks.RemoveAt(i); |
334 | ntrk++; | |
335 | } | |
336 | } | |
babd135a | 337 | |
c630aafd | 338 | itsTracks.Delete(); |
2257f27e | 339 | |
c630aafd | 340 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk); |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
af885e0f | 345 | Int_t AliITStrackerV2::PropagateBack(AliESDEvent *event) { |
c630aafd | 346 | //-------------------------------------------------------------------- |
347 | // This functions propagates reconstructed ITS tracks back | |
348 | // The clusters must be loaded ! | |
349 | //-------------------------------------------------------------------- | |
350 | Int_t nentr=event->GetNumberOfTracks(); | |
351 | Info("PropagateBack", "Number of ESD tracks: %d\n", nentr); | |
352 | ||
353 | Int_t ntrk=0; | |
354 | for (Int_t i=0; i<nentr; i++) { | |
355 | AliESDtrack *esd=event->GetTrack(i); | |
356 | ||
ba1a3e1a | 357 | if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue; |
358 | if (esd->GetStatus()&AliESDtrack::kITSout) continue; | |
c630aafd | 359 | |
763bdf3e | 360 | AliITStrackV2 *t = new AliITStrackV2(*esd); |
c630aafd | 361 | |
362 | ResetTrackToFollow(*t); | |
363 | ||
364 | // propagete to vertex [SR, GSI 17.02.2003] | |
a9459f9c | 365 | // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov |
366 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) { | |
6c94f330 | 367 | if (fTrackToFollow.PropagateToVertex(event->GetVertex())) { |
a9459f9c | 368 | fTrackToFollow.StartTimeIntegral(); |
369 | } | |
f9a4a033 | 370 | Bool_t okProp=fTrackToFollow.PropagateTo(3.,-0.0028,65.19); |
371 | if(!okProp){ | |
372 | AliWarning("Propagation to beam pipe radius failed"); | |
373 | } | |
a9459f9c | 374 | } |
c630aafd | 375 | |
6c94f330 | 376 | fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters(); |
c630aafd | 377 | if (RefitAt(49.,&fTrackToFollow,t)) { |
378 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { | |
379 | Warning("PropagateBack", | |
380 | "failed to correct for the material in the dead zone !\n"); | |
381 | delete t; | |
382 | continue; | |
383 | } | |
384 | fTrackToFollow.SetLabel(t->GetLabel()); | |
ba1a3e1a | 385 | //fTrackToFollow.CookdEdx(); |
c630aafd | 386 | CookLabel(&fTrackToFollow,0.); //For comparison only |
387 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout); | |
15dd636f | 388 | UseClusters(&fTrackToFollow); |
c630aafd | 389 | ntrk++; |
390 | } | |
391 | delete t; | |
392 | } | |
393 | ||
394 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk); | |
61ab8ea8 | 395 | |
83d73500 | 396 | return 0; |
397 | } | |
398 | ||
af885e0f | 399 | Int_t AliITStrackerV2::RefitInward(AliESDEvent *event) { |
83d73500 | 400 | //-------------------------------------------------------------------- |
401 | // This functions refits ITS tracks using the | |
402 | // "inward propagated" TPC tracks | |
c630aafd | 403 | // The clusters must be loaded ! |
83d73500 | 404 | //-------------------------------------------------------------------- |
c630aafd | 405 | Int_t nentr=event->GetNumberOfTracks(); |
406 | Info("RefitInward", "Number of ESD tracks: %d\n", nentr); | |
407 | ||
408 | Int_t ntrk=0; | |
409 | for (Int_t i=0; i<nentr; i++) { | |
410 | AliESDtrack *esd=event->GetTrack(i); | |
411 | ||
ba1a3e1a | 412 | if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue; |
413 | if (esd->GetStatus()&AliESDtrack::kITSrefit) continue; | |
414 | if (esd->GetStatus()&AliESDtrack::kTPCout) | |
15dd636f | 415 | if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue; |
c630aafd | 416 | |
763bdf3e | 417 | AliITStrackV2 *t = new AliITStrackV2(*esd); |
c630aafd | 418 | |
419 | if (CorrectForDeadZoneMaterial(t)!=0) { | |
420 | Warning("RefitInward", | |
421 | "failed to correct for the material in the dead zone !\n"); | |
422 | delete t; | |
423 | continue; | |
424 | } | |
425 | ||
426 | ResetTrackToFollow(*t); | |
427 | fTrackToFollow.ResetClusters(); | |
428 | ||
429 | //Refitting... | |
ef7253ac | 430 | if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) { |
c630aafd | 431 | fTrackToFollow.SetLabel(t->GetLabel()); |
432 | fTrackToFollow.CookdEdx(); | |
15dd636f | 433 | CookLabel(&fTrackToFollow,0.); //For comparison only |
18856a77 | 434 | |
49d13e89 | 435 | if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe |
09cf9d66 | 436 | fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit); |
49d13e89 | 437 | AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack(); |
f7a1cc68 | 438 | Double_t r[3]={0.,0.,0.}; |
49d13e89 | 439 | Double_t maxD=3.; |
440 | esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD); | |
441 | ntrk++; | |
67c3dcbe | 442 | } |
c630aafd | 443 | } |
444 | delete t; | |
445 | } | |
446 | ||
447 | Info("RefitInward","Number of refitted tracks: %d\n",ntrk); | |
83d73500 | 448 | |
c630aafd | 449 | return 0; |
450 | } | |
83d73500 | 451 | |
006b5f7f | 452 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { |
453 | //-------------------------------------------------------------------- | |
454 | // Return pointer to a given cluster | |
455 | //-------------------------------------------------------------------- | |
456 | Int_t l=(index & 0xf0000000) >> 28; | |
457 | Int_t c=(index & 0x0fffffff) >> 00; | |
18856a77 | 458 | return fgLayers[l].GetCluster(c); |
006b5f7f | 459 | } |
460 | ||
461 | ||
462 | void AliITStrackerV2::FollowProlongation() { | |
463 | //-------------------------------------------------------------------- | |
464 | //This function finds a track prolongation | |
465 | //-------------------------------------------------------------------- | |
c0dd5278 | 466 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 467 | Int_t i=fI-1; |
8676d691 | 468 | |
18856a77 | 469 | AliITSlayer &layer=fgLayers[i]; |
a9a2d814 | 470 | AliITStrackV2 &track=fTracks[i]; |
006b5f7f | 471 | |
14825d5a | 472 | Double_t r=layer.GetR(); |
61ab8ea8 | 473 | |
a9a2d814 | 474 | if (i==3 || i==1) { |
18856a77 | 475 | Double_t rs=0.5*(fgLayers[i+1].GetR() + r); |
61ab8ea8 | 476 | Double_t d=0.0034, x0=38.6; |
477 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
478 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 479 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 480 | return; |
a9a2d814 | 481 | } |
006b5f7f | 482 | } |
483 | ||
484 | //find intersection | |
8602c008 | 485 | Double_t phi,z; |
486 | if (!fTrackToFollow.GetPhiZat(r,phi,z)) { | |
8676d691 | 487 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 488 | return; |
006b5f7f | 489 | } |
f363d377 | 490 | |
006b5f7f | 491 | Int_t idet=layer.FindDetectorIndex(phi,z); |
492 | if (idet<0) { | |
8676d691 | 493 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 494 | return; |
006b5f7f | 495 | } |
496 | ||
497 | //propagate to the intersection | |
498 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 499 | phi=det.GetPhi(); |
a9a2d814 | 500 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 501 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 502 | return; |
006b5f7f | 503 | } |
504 | fTrackToFollow.SetDetectorIndex(idet); | |
505 | ||
506 | //Select possible prolongations and store the current track estimation | |
507 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
44347160 | 508 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
509 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); | |
8676d691 | 510 | Double_t road=layer.GetRoad(); |
511 | if (dz*dy>road*road) { | |
512 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
513 | dz=road*scz; dy=road*scy; | |
514 | } | |
b87bd7cd | 515 | |
44347160 | 516 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
14825d5a | 517 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
44347160 | 518 | if (dz > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) { |
8676d691 | 519 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 520 | return; |
006b5f7f | 521 | } |
a9a2d814 | 522 | |
15dd636f | 523 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 524 | |
44347160 | 525 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); |
14825d5a | 526 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
44347160 | 527 | if (dy > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) { |
8676d691 | 528 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 529 | return; |
006b5f7f | 530 | } |
a9a2d814 | 531 | |
c219fd63 | 532 | fI--; |
533 | ||
7f6ddf58 | 534 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 535 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 536 | Double_t ymin=track.GetY() + r*phi - dy; |
537 | Double_t ymax=track.GetY() + r*phi + dy; | |
c219fd63 | 538 | if (layer.SelectClusters(zmin,zmax,ymin,ymax)==0) |
539 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 540 | |
15dd636f | 541 | if (!TakeNextProlongation()) |
542 | if (fLayersNotToSkip[fI]) return; | |
543 | ||
006b5f7f | 544 | } |
545 | ||
546 | //deal with the best track | |
547 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
548 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
15dd636f | 549 | if (ncl) |
550 | if (ncl >= nclb) { | |
551 | Double_t chi2=fTrackToFollow.GetChi2(); | |
44347160 | 552 | if (chi2/ncl < AliITSReconstructor::GetRecoParam()->GetChi2PerCluster()) { |
15dd636f | 553 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { |
554 | ResetBestTrack(); | |
006b5f7f | 555 | } |
15dd636f | 556 | } |
006b5f7f | 557 | } |
15dd636f | 558 | |
006b5f7f | 559 | } |
560 | ||
006b5f7f | 561 | Int_t AliITStrackerV2::TakeNextProlongation() { |
562 | //-------------------------------------------------------------------- | |
a9a2d814 | 563 | // This function takes another track prolongation |
564 | // | |
565 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 566 | //-------------------------------------------------------------------- |
18856a77 | 567 | AliITSlayer &layer=fgLayers[fI]; |
4ab260d6 | 568 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 569 | |
44347160 | 570 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(fI)); |
571 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(fI)); | |
8676d691 | 572 | Double_t road=layer.GetRoad(); |
573 | if (dz*dy>road*road) { | |
574 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
575 | dz=road*scz; dy=road*scy; | |
576 | } | |
006b5f7f | 577 | |
00a7cc50 | 578 | const AliITSRecPoint *c=0; Int_t ci=-1; |
579 | const AliITSRecPoint *cc=0; Int_t cci=-1; | |
44347160 | 580 | Double_t chi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); |
006b5f7f | 581 | while ((c=layer.GetNextCluster(ci))!=0) { |
006b5f7f | 582 | Int_t idet=c->GetDetectorIndex(); |
15dd636f | 583 | |
4ab260d6 | 584 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 585 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 586 | ResetTrackToFollow(fTracks[fI]); |
587 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 588 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 589 | continue; |
590 | } | |
4ab260d6 | 591 | fTrackToFollow.SetDetectorIndex(idet); |
592 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 593 | } |
594 | ||
4ab260d6 | 595 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
596 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 597 | |
c219fd63 | 598 | Double_t ch2=fTrackToFollow.GetPredictedChi2(c); |
599 | if (ch2 > chi2) continue; | |
600 | chi2=ch2; | |
601 | cc=c; cci=ci; | |
602 | break; | |
006b5f7f | 603 | } |
604 | ||
c219fd63 | 605 | if (!cc) return 0; |
006b5f7f | 606 | |
1f3e997f | 607 | {// Take into account the mis-alignment |
608 | Double_t x = fTrackToFollow.GetX() + cc->GetX(); | |
609 | if (!fTrackToFollow.PropagateTo(x,0.,0.)) return 0; | |
610 | } | |
c219fd63 | 611 | if (!fTrackToFollow.Update(cc,chi2,(fI<<28)+cci)) { |
8676d691 | 612 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 613 | return 0; |
614 | } | |
15dd636f | 615 | |
4ab260d6 | 616 | if (fTrackToFollow.GetNumberOfClusters()>1) |
6c94f330 | 617 | if (TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()))>4) return 0; |
4ab260d6 | 618 | |
a9a2d814 | 619 | fTrackToFollow. |
09cf9d66 | 620 | SetSampledEdx(cc->GetQ(),fI-2); //b.b. |
a9a2d814 | 621 | |
622 | { | |
880f41b9 | 623 | Double_t x0; |
61ab8ea8 | 624 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 625 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 626 | } |
4ab260d6 | 627 | |
a9a2d814 | 628 | if (fConstraint[fPass]) { |
4ab260d6 | 629 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 630 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
631 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
632 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 633 | } |
006b5f7f | 634 | |
006b5f7f | 635 | return 1; |
636 | } | |
637 | ||
638 | ||
6c94f330 | 639 | AliITStrackerV2::AliITSlayer::AliITSlayer(): |
640 | fR(0.), | |
641 | fPhiOffset(0.), | |
642 | fNladders(0), | |
643 | fZOffset(0.), | |
644 | fNdetectors(0), | |
645 | fDetectors(0), | |
646 | fNsel(0), | |
647 | fRoad(2*fR*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
648 | { | |
006b5f7f | 649 | //-------------------------------------------------------------------- |
650 | //default AliITSlayer constructor | |
651 | //-------------------------------------------------------------------- | |
c219fd63 | 652 | |
653 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; | |
4edc3c8c | 654 | for (Int_t i=0; i<AliITSRecoParam::kMaxClusterPerLayer; i++){ |
1e788092 | 655 | fClusters[i]=0; |
656 | fIndex[i]=0; | |
657 | } | |
006b5f7f | 658 | } |
659 | ||
660 | AliITStrackerV2::AliITSlayer:: | |
6c94f330 | 661 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd): |
662 | fR(r), | |
663 | fPhiOffset(p), | |
664 | fNladders(nl), | |
665 | fZOffset(z), | |
666 | fNdetectors(nd), | |
667 | fDetectors(new AliITSdetector[nl*nd]), | |
668 | fNsel(0), | |
669 | fRoad(2*r*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster | |
670 | { | |
006b5f7f | 671 | //-------------------------------------------------------------------- |
672 | //main AliITSlayer constructor | |
673 | //-------------------------------------------------------------------- | |
006b5f7f | 674 | |
c219fd63 | 675 | for (Int_t i=0; i<kNsector; i++) fN[i]=0; |
c219fd63 | 676 | |
4edc3c8c | 677 | for (Int_t i=0; i<AliITSRecoParam::kMaxClusterPerLayer; i++){ |
1e788092 | 678 | fClusters[i]=0; |
679 | fIndex[i]=0; | |
680 | } | |
006b5f7f | 681 | } |
682 | ||
683 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
684 | //-------------------------------------------------------------------- | |
685 | // AliITSlayer destructor | |
686 | //-------------------------------------------------------------------- | |
687 | delete[] fDetectors; | |
c219fd63 | 688 | ResetClusters(); |
006b5f7f | 689 | } |
690 | ||
61ab8ea8 | 691 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
692 | //-------------------------------------------------------------------- | |
693 | // This function removes loaded clusters | |
694 | //-------------------------------------------------------------------- | |
c219fd63 | 695 | for (Int_t s=0; s<kNsector; s++) { |
696 | Int_t &n=fN[s]; | |
697 | while (n) { | |
698 | n--; | |
699 | delete fClusters[s*kMaxClusterPerSector+n]; | |
700 | } | |
701 | } | |
61ab8ea8 | 702 | } |
703 | ||
b87bd7cd | 704 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
705 | //-------------------------------------------------------------------- | |
706 | // This function calculates the road defined by the cluster density | |
707 | //-------------------------------------------------------------------- | |
708 | Int_t n=0; | |
c219fd63 | 709 | for (Int_t s=0; s<kNsector; s++) { |
710 | Int_t i=fN[s]; | |
711 | while (i--) | |
712 | if (TMath::Abs(fClusters[s*kMaxClusterPerSector+i]->GetZ())<fR) n++; | |
b87bd7cd | 713 | } |
714 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
715 | } | |
716 | ||
00a7cc50 | 717 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSRecPoint *c) { |
006b5f7f | 718 | //-------------------------------------------------------------------- |
c219fd63 | 719 | // This function inserts a cluster to this layer in increasing |
720 | // order of the cluster's fZ | |
006b5f7f | 721 | //-------------------------------------------------------------------- |
c219fd63 | 722 | Float_t circ=TMath::TwoPi()*fR; |
723 | Int_t sec=Int_t(kNsector*c->GetPhiR()/circ); | |
81e97e0d | 724 | if (sec>=kNsector) { |
725 | ::Error("InsertCluster","Wrong sector !\n"); | |
726 | return 1; | |
727 | } | |
c219fd63 | 728 | Int_t &n=fN[sec]; |
729 | if (n>=kMaxClusterPerSector) { | |
730 | ::Error("InsertCluster","Too many clusters !\n"); | |
731 | return 1; | |
006b5f7f | 732 | } |
c219fd63 | 733 | if (n==0) fClusters[sec*kMaxClusterPerSector]=c; |
734 | else { | |
735 | Int_t i=FindClusterIndex(c->GetZ(),sec); | |
736 | Int_t k=n-i+sec*kMaxClusterPerSector; | |
00a7cc50 | 737 | memmove(fClusters+i+1 ,fClusters+i,k*sizeof(AliITSRecPoint*)); |
c219fd63 | 738 | fClusters[i]=c; |
739 | } | |
740 | n++; | |
006b5f7f | 741 | return 0; |
742 | } | |
743 | ||
c219fd63 | 744 | Int_t |
745 | AliITStrackerV2::AliITSlayer::FindClusterIndex(Float_t z,Int_t s) const { | |
006b5f7f | 746 | //-------------------------------------------------------------------- |
c219fd63 | 747 | // For the sector "s", this function returns the index of the first |
748 | // with its fZ >= "z". | |
006b5f7f | 749 | //-------------------------------------------------------------------- |
c219fd63 | 750 | Int_t nc=fN[s]; |
751 | if (nc==0) return kMaxClusterPerSector*s; | |
752 | ||
753 | Int_t b=kMaxClusterPerSector*s; | |
754 | if (z <= fClusters[b]->GetZ()) return b; | |
755 | ||
756 | Int_t e=b+nc-1; | |
757 | if (z > fClusters[e]->GetZ()) return e+1; | |
758 | ||
759 | Int_t m=(b+e)/2; | |
006b5f7f | 760 | for (; b<e; m=(b+e)/2) { |
761 | if (z > fClusters[m]->GetZ()) b=m+1; | |
762 | else e=m; | |
763 | } | |
764 | return m; | |
765 | } | |
766 | ||
c219fd63 | 767 | Int_t AliITStrackerV2::AliITSlayer:: |
768 | SelectClusters(Float_t zmin,Float_t zmax,Float_t ymin, Float_t ymax) { | |
006b5f7f | 769 | //-------------------------------------------------------------------- |
c219fd63 | 770 | // This function selects clusters within the "window" |
006b5f7f | 771 | //-------------------------------------------------------------------- |
c219fd63 | 772 | Float_t circ=fR*TMath::TwoPi(); |
773 | ||
774 | if (ymin>circ) ymin-=circ; else if (ymin<0) ymin+=circ; | |
775 | if (ymax>circ) ymax-=circ; else if (ymax<0) ymax+=circ; | |
776 | ||
521f4796 | 777 | Int_t i1=Int_t(kNsector*ymin/circ); if (i1==kNsector) i1--; |
c219fd63 | 778 | if (fN[i1]!=0) { |
779 | Float_t ym = (ymax<ymin) ? ymax+circ : ymax; | |
780 | Int_t i=FindClusterIndex(zmin,i1), imax=i1*kMaxClusterPerSector+fN[i1]; | |
781 | for (; i<imax; i++) { | |
00a7cc50 | 782 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 783 | if (c->IsUsed()) continue; |
784 | if (c->GetZ()>zmax) break; | |
785 | if (c->GetPhiR()<=ymin) continue; | |
786 | if (c->GetPhiR()>ym) continue; | |
787 | fIndex[fNsel++]=i; | |
788 | } | |
789 | } | |
790 | ||
521f4796 | 791 | Int_t i2=Int_t(kNsector*ymax/circ); if (i2==kNsector) i2--; |
c219fd63 | 792 | if (i2==i1) return fNsel; |
793 | ||
794 | if (fN[i2]!=0) { | |
795 | Float_t ym = (ymin>ymax) ? ymin-circ : ymin; | |
796 | Int_t i=FindClusterIndex(zmin,i2), imax=i2*kMaxClusterPerSector+fN[i2]; | |
797 | for (; i<imax; i++) { | |
00a7cc50 | 798 | AliITSRecPoint *c=fClusters[i]; |
c219fd63 | 799 | if (c->IsUsed()) continue; |
800 | if (c->GetZ()>zmax) break; | |
801 | if (c->GetPhiR()<=ym) continue; | |
802 | if (c->GetPhiR()>ymax) continue; | |
803 | fIndex[fNsel++]=i; | |
804 | } | |
805 | } | |
806 | ||
807 | return fNsel; | |
006b5f7f | 808 | } |
809 | ||
00a7cc50 | 810 | const AliITSRecPoint *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ |
006b5f7f | 811 | //-------------------------------------------------------------------- |
812 | // This function returns clusters within the "window" | |
813 | //-------------------------------------------------------------------- | |
00a7cc50 | 814 | AliITSRecPoint *c=0; |
c219fd63 | 815 | ci=-1; |
816 | if (fNsel) { | |
817 | fNsel--; | |
818 | ci=fIndex[fNsel]; | |
819 | c=fClusters[ci]; | |
006b5f7f | 820 | } |
c219fd63 | 821 | return c; |
822 | } | |
7f6ddf58 | 823 | |
c219fd63 | 824 | Int_t AliITStrackerV2::AliITSlayer::GetNumberOfClusters() const { |
825 | Int_t n=0; | |
826 | for (Int_t s=0; s<kNsector; s++) n+=fN[s]; | |
827 | return n; | |
006b5f7f | 828 | } |
829 | ||
c219fd63 | 830 | Int_t |
831 | AliITStrackerV2::AliITSlayer::FindDetectorIndex(Double_t phi,Double_t z)const { | |
006b5f7f | 832 | //-------------------------------------------------------------------- |
833 | //This function finds the detector crossed by the track | |
834 | //-------------------------------------------------------------------- | |
31fb8575 | 835 | Double_t dphi; |
836 | if (fZOffset<0) // old geometry | |
837 | dphi = -(phi-fPhiOffset); | |
838 | else // new geometry | |
839 | dphi = phi-fPhiOffset; | |
840 | ||
006b5f7f | 841 | if (dphi < 0) dphi += 2*TMath::Pi(); |
842 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
843 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 844 | if (np>=fNladders) np-=fNladders; |
845 | if (np<0) np+=fNladders; | |
006b5f7f | 846 | |
847 | Double_t dz=fZOffset-z; | |
848 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 849 | if (nz>=fNdetectors) return -1; |
850 | if (nz<0) return -1; | |
006b5f7f | 851 | |
006b5f7f | 852 | return np*fNdetectors + nz; |
853 | } | |
854 | ||
855 | Double_t | |
61ab8ea8 | 856 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
857 | const { | |
a9a2d814 | 858 | //-------------------------------------------------------------------- |
859 | //This function returns the layer thickness at this point (units X0) | |
860 | //-------------------------------------------------------------------- | |
861 | Double_t d=0.0085; | |
61ab8ea8 | 862 | x0=21.82; |
a9a2d814 | 863 | |
864 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 865 | Double_t dd=0.0034; |
866 | d=dd; | |
867 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
868 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
869 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 870 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 871 | if (TMath::Abs(z-3.9*(i+0.5))<0.15) { |
872 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
873 | d+=0.0034; | |
874 | break; | |
875 | } | |
876 | if (TMath::Abs(z+3.9*(i+0.5))<0.15) { | |
877 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
878 | d+=0.0034; | |
879 | break; | |
880 | } | |
881 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
882 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 883 | } |
884 | } else | |
885 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 886 | Double_t dd=0.0034; |
887 | d=dd; | |
888 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
889 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
890 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 891 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 892 | if (TMath::Abs(z-3.9*i)<0.15) { |
893 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
894 | d+=dd; | |
895 | break; | |
896 | } | |
897 | if (TMath::Abs(z+3.9*i)<0.15) { | |
898 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
899 | d+=dd; | |
900 | break; | |
901 | } | |
902 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
903 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 904 | } |
905 | } else | |
906 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 907 | Double_t dd=0.0033; |
908 | d=dd; | |
909 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
910 | ||
911 | if (TMath::Abs(y-1.80)<0.55) { | |
912 | d+=0.016; | |
913 | for (Int_t j=0; j<20; j++) { | |
914 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
915 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
916 | } | |
917 | } | |
918 | if (TMath::Abs(y+1.80)<0.55) { | |
919 | d+=0.016; | |
920 | for (Int_t j=0; j<20; j++) { | |
921 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
922 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
923 | } | |
924 | } | |
925 | ||
926 | for (Int_t i=0; i<4; i++) { | |
927 | if (TMath::Abs(z-7.3*i)<0.60) { | |
928 | d+=dd; | |
929 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
930 | break; | |
931 | } | |
932 | if (TMath::Abs(z+7.3*i)<0.60) { | |
933 | d+=dd; | |
934 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
935 | break; | |
936 | } | |
a9a2d814 | 937 | } |
938 | } else | |
939 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 940 | Double_t dd=0.0063; x0=21.5; |
941 | d=dd; | |
942 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
943 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
944 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 945 | } else |
946 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 947 | Double_t dd=0.0063; x0=21.5; |
948 | d=dd; | |
949 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
950 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
951 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 952 | } |
953 | ||
a9a2d814 | 954 | return d; |
955 | } | |
006b5f7f | 956 | |
a9a2d814 | 957 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 958 | { |
959 | //-------------------------------------------------------------------- | |
a9a2d814 | 960 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 961 | //-------------------------------------------------------------------- |
61ab8ea8 | 962 | Double_t d=0.0028*3*3; //beam pipe |
963 | Double_t x0=0; | |
006b5f7f | 964 | |
18856a77 | 965 | Double_t xn=fgLayers[fI].GetR(); |
006b5f7f | 966 | for (Int_t i=0; i<fI; i++) { |
18856a77 | 967 | Double_t xi=fgLayers[i].GetR(); |
968 | d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi; | |
006b5f7f | 969 | } |
970 | ||
971 | if (fI>1) { | |
61ab8ea8 | 972 | Double_t xi=9.; |
973 | d+=0.0097*xi*xi; | |
006b5f7f | 974 | } |
975 | ||
976 | if (fI>3) { | |
18856a77 | 977 | Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR()); |
61ab8ea8 | 978 | d+=0.0034*xi*xi; |
006b5f7f | 979 | } |
61ab8ea8 | 980 | |
006b5f7f | 981 | return d/(xn*xn); |
982 | } | |
983 | ||
ef7253ac | 984 | Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t, |
985 | const AliITStrackV2 *c, Bool_t extra) { | |
4ab260d6 | 986 | //-------------------------------------------------------------------- |
c630aafd | 987 | // This function refits the track "t" at the position "x" using |
988 | // the clusters from "c" | |
ef7253ac | 989 | // If "extra"==kTRUE, |
990 | // the clusters from overlapped modules get attached to "t" | |
4ab260d6 | 991 | //-------------------------------------------------------------------- |
e50912db | 992 | Int_t index[AliITSgeomTGeo::kNLayers]; |
880f41b9 | 993 | Int_t k; |
e50912db | 994 | for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1; |
c630aafd | 995 | Int_t nc=c->GetNumberOfClusters(); |
880f41b9 | 996 | for (k=0; k<nc; k++) { |
c630aafd | 997 | Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 998 | index[nl]=idx; |
999 | } | |
880f41b9 | 1000 | |
4ab260d6 | 1001 | Int_t from, to, step; |
ee34184f | 1002 | if (xx > t->GetX()) { |
e50912db | 1003 | from=0; to=AliITSgeomTGeo::GetNLayers(); |
4ab260d6 | 1004 | step=+1; |
1005 | } else { | |
e50912db | 1006 | from=AliITSgeomTGeo::GetNLayers()-1; to=-1; |
4ab260d6 | 1007 | step=-1; |
1008 | } | |
1009 | ||
1010 | for (Int_t i=from; i != to; i += step) { | |
18856a77 | 1011 | AliITSlayer &layer=fgLayers[i]; |
4ab260d6 | 1012 | Double_t r=layer.GetR(); |
1013 | ||
1014 | { | |
1015 | Double_t hI=i-0.5*step; | |
225cff59 | 1016 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
1017 | Int_t iLay = i-step; | |
1018 | Double_t rs = 0.; | |
1019 | if(iLay<0 || iLay>= AliITSgeomTGeo::kNLayers){ | |
225cff59 | 1020 | AliError(Form("Invalid layer %d ",iLay)); |
1021 | return kFALSE; | |
1022 | } | |
1e788092 | 1023 | else{ |
1024 | rs=0.5*(fgLayers[i-step].GetR() + r); | |
1025 | } | |
225cff59 | 1026 | Double_t d=0.0034, x0=38.6; |
1027 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} | |
1028 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
1029 | return kFALSE; | |
1030 | } | |
4ab260d6 | 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 | ||
8602c008 | 1041 | Double_t phi,z; |
1042 | if (!t->GetPhiZat(r,phi,z)) { | |
4ab260d6 | 1043 | return kFALSE; |
1044 | } | |
8602c008 | 1045 | |
4ab260d6 | 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; |
44347160 | 1058 | Double_t maxchi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); |
4ab260d6 | 1059 | |
1060 | Int_t idx=index[i]; | |
c0342e67 | 1061 | if (idx>=0) { |
a5d0fae6 | 1062 | const AliITSRecPoint *ccc=(AliITSRecPoint *)GetCluster(idx); |
1063 | if (idet != ccc->GetDetectorIndex()) { | |
1064 | idet=ccc->GetDetectorIndex(); | |
1065 | const AliITSdetector &det2=layer.GetDetector(idet); | |
1066 | if (!t->Propagate(det2.GetPhi(),det2.GetR())) { | |
4ab260d6 | 1067 | return kFALSE; |
1068 | } | |
1069 | t->SetDetectorIndex(idet); | |
1070 | } | |
a5d0fae6 | 1071 | Double_t chi2=t->GetPredictedChi2(ccc); |
c630aafd | 1072 | if (chi2<maxchi2) { |
a5d0fae6 | 1073 | cl=ccc; |
c630aafd | 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 | } | |
09cf9d66 | 1087 | t->SetSampledEdx(cl->GetQ(),i-2); |
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); | |
44347160 | 1098 | Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i)); |
ef7253ac | 1099 | if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl()); |
44347160 | 1100 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(i)); |
ef7253ac | 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 | ||
a5d0fae6 | 1108 | const AliITSRecPoint *cx=0; Int_t ci=-1,cci=-1; |
1109 | maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(); | |
1110 | Double_t tolerance=0.1; | |
1111 | while ((cx=layer.GetNextCluster(ci))!=0) { | |
1112 | if (idet == cx->GetDetectorIndex()) continue; | |
ef7253ac | 1113 | |
a5d0fae6 | 1114 | const AliITSdetector &detx=layer.GetDetector(cx->GetDetectorIndex()); |
ef7253ac | 1115 | |
a5d0fae6 | 1116 | if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue; |
ef7253ac | 1117 | |
a5d0fae6 | 1118 | if (TMath::Abs(tmp.GetZ() - cx->GetZ()) > tolerance) continue; |
1119 | if (TMath::Abs(tmp.GetY() - cx->GetY()) > tolerance) continue; | |
ef7253ac | 1120 | |
a5d0fae6 | 1121 | Double_t chi2=tmp.GetPredictedChi2(cx); |
ef7253ac | 1122 | if (chi2<maxchi2) { maxchi2=chi2; cci=ci; } |
1123 | } | |
1124 | if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci); | |
1125 | } | |
1126 | ||
880f41b9 | 1127 | // track time update [SR, GSI 17.02.2003] |
1128 | if (t->IsStartedTimeIntegral() && step==1) { | |
1129 | Double_t newX, newY, newZ; | |
1130 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1131 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1132 | (oldZ-newZ)*(oldZ-newZ); | |
1133 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1134 | } | |
1135 | // | |
4ab260d6 | 1136 | |
1137 | } | |
1138 | ||
ee34184f | 1139 | if (!t->PropagateTo(xx,0.,0.)) return kFALSE; |
4ab260d6 | 1140 | return kTRUE; |
1141 | } | |
1142 | ||
b87bd7cd | 1143 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1144 | //-------------------------------------------------------------------- | |
1145 | // This function marks clusters assigned to the track | |
1146 | //-------------------------------------------------------------------- | |
1147 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1148 | |
5482d29d | 1149 | Int_t clusterIndex = t->GetClusterIndex(0); |
1150 | AliITSRecPoint *c= 0x0; | |
1151 | ||
1152 | if (clusterIndex>-1) | |
1153 | c = (AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1154 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
5482d29d | 1155 | |
1156 | c = 0x0; | |
1157 | clusterIndex = t->GetClusterIndex(1); | |
1158 | if (clusterIndex>-1) | |
1159 | c=(AliITSRecPoint *)GetCluster(clusterIndex); | |
d920bdee | 1160 | if (c && c->GetSigmaZ2()>0.1) c->UnUse(); |
880f41b9 | 1161 | |
b87bd7cd | 1162 | } |