]>
Commit | Line | Data |
---|---|---|
006b5f7f | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | //------------------------------------------------------------------------- | |
17 | // Implementation of the ITS tracker class | |
18 | // | |
19 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
a9a2d814 | 20 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch |
006b5f7f | 21 | //------------------------------------------------------------------------- |
1f9a65c4 | 22 | |
006b5f7f | 23 | #include <TFile.h> |
24 | #include <TTree.h> | |
25 | #include <TRandom.h> | |
006b5f7f | 26 | |
27 | #include "AliITSgeom.h" | |
28 | #include "AliITSRecPoint.h" | |
517b130f | 29 | #include "AliTPCtrack.h" |
006b5f7f | 30 | #include "AliITSclusterV2.h" |
31 | #include "AliITStrackerV2.h" | |
32 | ||
88cb7938 | 33 | #include "AliRunLoader.h" |
34 | #include "AliLoader.h" | |
35 | #include "AliITSLoader.h" | |
36 | ||
8676d691 | 37 | ClassImp(AliITStrackerV2) |
006b5f7f | 38 | |
006b5f7f | 39 | AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers |
40 | ||
88cb7938 | 41 | AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom, Int_t eventn, const char* evfoldname): |
42 | AliTracker(), | |
43 | fEvFolderName(evfoldname) { | |
006b5f7f | 44 | //-------------------------------------------------------------------- |
61ab8ea8 | 45 | //This is the AliITStrackerV2 constructor |
006b5f7f | 46 | //-------------------------------------------------------------------- |
006b5f7f | 47 | AliITSgeom *g=(AliITSgeom*)geom; |
48 | ||
49 | Float_t x,y,z; | |
50 | Int_t i; | |
88cb7938 | 51 | for (i=1; i<kMaxLayer+1; i++) |
52 | { | |
006b5f7f | 53 | Int_t nlad=g->GetNladders(i); |
54 | Int_t ndet=g->GetNdetectors(i); | |
55 | ||
56 | g->GetTrans(i,1,1,x,y,z); | |
57 | Double_t r=TMath::Sqrt(x*x + y*y); | |
58 | Double_t poff=TMath::ATan2(y,x); | |
59 | Double_t zoff=z; | |
60 | ||
61 | g->GetTrans(i,1,2,x,y,z); | |
62 | r += TMath::Sqrt(x*x + y*y); | |
63 | g->GetTrans(i,2,1,x,y,z); | |
64 | r += TMath::Sqrt(x*x + y*y); | |
65 | g->GetTrans(i,2,2,x,y,z); | |
66 | r += TMath::Sqrt(x*x + y*y); | |
67 | r*=0.25; | |
68 | ||
69 | new (fLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet); | |
70 | ||
71 | for (Int_t j=1; j<nlad+1; j++) { | |
72 | for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors | |
73 | Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift); | |
74 | Double_t rot[9]; g->GetRotMatrix(i,j,k,rot); | |
75 | ||
76 | Double_t r =-x*rot[1] + y*rot[0]; if (i==1) r=-r; | |
77 | Double_t phi=TMath::ATan2(rot[1],rot[0]); if (i==1) phi-=3.1415927; | |
61ab8ea8 | 78 | phi+=0.5*TMath::Pi(); if (phi<0) phi += 2*TMath::Pi(); |
006b5f7f | 79 | AliITSdetector &det=fLayers[i-1].GetDetector((j-1)*ndet + k-1); |
80 | ||
006b5f7f | 81 | new(&det) AliITSdetector(r,phi); |
82 | } | |
83 | } | |
006b5f7f | 84 | } |
85 | ||
61ab8ea8 | 86 | fI=kMaxLayer; |
743a19f2 | 87 | |
88cb7938 | 88 | |
61ab8ea8 | 89 | fPass=0; |
90 | fConstraint[0]=1; fConstraint[1]=0; | |
8676d691 | 91 | |
92 | Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV}; | |
93 | SetVertex(xyz,ers); | |
c0dd5278 | 94 | |
95 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i]; | |
96 | fLastLayerToTrackTo=kLastLayerToTrackTo; | |
97 | ||
98 | } | |
99 | ||
100 | void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) { | |
101 | //-------------------------------------------------------------------- | |
102 | //This function set masks of the layers which must be not skipped | |
103 | //-------------------------------------------------------------------- | |
104 | for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i]; | |
61ab8ea8 | 105 | } |
006b5f7f | 106 | |
8676d691 | 107 | Int_t AliITStrackerV2::LoadClusters() { |
61ab8ea8 | 108 | //-------------------------------------------------------------------- |
109 | //This function loads ITS clusters | |
110 | //-------------------------------------------------------------------- | |
88cb7938 | 111 | //This class can go to AliITSLoader -- see AliPHOSLoader as an example |
112 | AliRunLoader* rl = AliRunLoader::GetRunLoader(fEvFolderName); | |
113 | if (rl == 0x0) | |
114 | { | |
115 | Error("LoadClusters","Can not get RL from specified folder %s",fEvFolderName.Data()); | |
116 | return 1; | |
117 | } | |
118 | AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader"); | |
119 | if (itsl == 0x0) | |
120 | { | |
121 | Error("LoadClusters","Can not get ITS loader."); | |
83d73500 | 122 | return 1; |
88cb7938 | 123 | } |
124 | ||
125 | Int_t retval; | |
126 | TTree *cTree=itsl->TreeC(); | |
127 | if (!cTree) { | |
128 | retval = itsl->LoadRawClusters("read"); | |
129 | if (retval) | |
130 | { | |
131 | Error("LoadClusters","LoadRawClusters returned error."); | |
132 | return 1; | |
133 | } | |
134 | cTree=itsl->TreeC(); | |
135 | } | |
136 | ||
61ab8ea8 | 137 | if (!cTree) { |
8676d691 | 138 | Error("LoadClusters"," can't get cTree !\n"); |
139 | return 1; | |
61ab8ea8 | 140 | } |
141 | TBranch *branch=cTree->GetBranch("Clusters"); | |
142 | if (!branch) { | |
8676d691 | 143 | Error("LoadClusters"," can't get Clusters branch !\n"); |
144 | return 1; | |
61ab8ea8 | 145 | } |
006b5f7f | 146 | |
61ab8ea8 | 147 | TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy; |
148 | branch->SetAddress(&clusters); | |
006b5f7f | 149 | |
61ab8ea8 | 150 | Int_t j=0; |
151 | for (Int_t i=0; i<kMaxLayer; i++) { | |
b87bd7cd | 152 | Int_t ndet=fLayers[i].GetNdetectors(); |
153 | Int_t jmax = j + fLayers[i].GetNladders()*ndet; | |
61ab8ea8 | 154 | for (; j<jmax; j++) { |
155 | if (!cTree->GetEvent(j)) continue; | |
156 | Int_t ncl=clusters->GetEntriesFast(); | |
157 | while (ncl--) { | |
158 | AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl); | |
61ab8ea8 | 159 | fLayers[i].InsertCluster(new AliITSclusterV2(*c)); |
160 | } | |
161 | clusters->Delete(); | |
162 | } | |
b87bd7cd | 163 | fLayers[i].ResetRoad(); //road defined by the cluster density |
006b5f7f | 164 | } |
88cb7938 | 165 | |
166 | itsl->UnloadRawClusters(); | |
8676d691 | 167 | return 0; |
61ab8ea8 | 168 | } |
006b5f7f | 169 | |
61ab8ea8 | 170 | void AliITStrackerV2::UnloadClusters() { |
171 | //-------------------------------------------------------------------- | |
172 | //This function unloads ITS clusters | |
173 | //-------------------------------------------------------------------- | |
174 | for (Int_t i=0; i<kMaxLayer; i++) fLayers[i].ResetClusters(); | |
006b5f7f | 175 | } |
176 | ||
880f41b9 | 177 | static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) { |
178 | //-------------------------------------------------------------------- | |
179 | // Correction for the material between the TPC and the ITS | |
180 | // (should it belong to the TPC code ?) | |
181 | //-------------------------------------------------------------------- | |
182 | Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ? | |
183 | Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ? | |
184 | Double_t yr=12.8, dr=0.03; // rods ? | |
185 | Double_t zm=0.2, dm=0.40; // membrane | |
186 | //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails | |
187 | Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?) | |
188 | ||
189 | if (t->GetX() > riw) { | |
190 | if (!t->PropagateTo(riw,diw,x0iw)) return 1; | |
191 | if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr); | |
192 | if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm); | |
193 | if (!t->PropagateTo(rcd,dcd,x0cd)) return 1; | |
194 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
195 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r); | |
196 | if (!t->PropagateTo(rs,ds)) return 1; | |
197 | } else if (t->GetX() < rs) { | |
198 | if (!t->PropagateTo(rs,-ds)) return 1; | |
199 | //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z); | |
200 | //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r); | |
201 | if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1; | |
202 | if (!t->PropagateTo(riw,-diw,x0iw)) return 1; | |
203 | } else { | |
204 | ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !"); | |
205 | return 1; | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
88cb7938 | 211 | Int_t AliITStrackerV2::Clusters2Tracks() { |
006b5f7f | 212 | //-------------------------------------------------------------------- |
213 | //This functions reconstructs ITS tracks | |
214 | //-------------------------------------------------------------------- | |
006b5f7f | 215 | |
88cb7938 | 216 | |
217 | AliRunLoader* rl = AliRunLoader::GetRunLoader(fEvFolderName); | |
218 | if (rl == 0x0) | |
219 | { | |
220 | Error("Clusters2Tracks","Can not get RL from specified folder %s",fEvFolderName.Data()); | |
221 | return 1; | |
222 | } | |
223 | rl->GetEvent(GetEventNumber()); | |
224 | //leave loading clusters here - than it is not necessary to GetEvent two times | |
225 | if (LoadClusters()!=0) return 1; | |
226 | ||
227 | AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader"); | |
228 | AliLoader* tpcl = rl->GetLoader("TPCLoader"); | |
229 | if ( !tpcl || !itsl) | |
230 | { | |
231 | Error("Clusters2Tracks","Can not get loaders"); | |
8676d691 | 232 | return 2; |
88cb7938 | 233 | } |
234 | ||
006b5f7f | 235 | |
a7554aa9 | 236 | Int_t nentr=0; TObjArray itsTracks(15000); |
7f6ddf58 | 237 | |
238 | {/* Read TPC tracks */ | |
88cb7938 | 239 | |
240 | if (tpcl->TreeT() == 0x0) tpcl->LoadTracks("read"); | |
241 | TTree *tpcTree = tpcl->TreeT(); | |
7f6ddf58 | 242 | if (!tpcTree) { |
8676d691 | 243 | Error("Clusters2Tracks","can't get a tree with TPC tracks !\n"); |
244 | return 3; | |
7f6ddf58 | 245 | } |
246 | AliTPCtrack *itrack=new AliTPCtrack; | |
247 | tpcTree->SetBranchAddress("tracks",&itrack); | |
248 | nentr=(Int_t)tpcTree->GetEntries(); | |
880f41b9 | 249 | Info("Clusters2Tracks","Number of TPC tracks: %d\n",nentr); |
250 | ||
7f6ddf58 | 251 | for (Int_t i=0; i<nentr; i++) { |
252 | tpcTree->GetEvent(i); | |
4ab260d6 | 253 | AliITStrackV2 *t=0; |
254 | try { | |
255 | t=new AliITStrackV2(*itrack); | |
256 | } catch (const Char_t *msg) { | |
8676d691 | 257 | Warning("Clusters2Tracks",msg); |
4ab260d6 | 258 | delete t; |
259 | continue; | |
260 | } | |
a9a2d814 | 261 | if (TMath::Abs(t->GetD())>4) continue; |
262 | ||
880f41b9 | 263 | if (CorrectForDeadZoneMaterial(t)!=0) { |
264 | Warning("Clusters2Tracks", | |
265 | "failed to correct for the material in the dead zone !\n"); | |
266 | continue; | |
267 | } | |
a9a2d814 | 268 | |
269 | itsTracks.AddLast(t); | |
7f6ddf58 | 270 | } |
7f6ddf58 | 271 | delete itrack; |
006b5f7f | 272 | } |
7f6ddf58 | 273 | itsTracks.Sort(); |
880f41b9 | 274 | nentr=itsTracks.GetEntriesFast(); |
006b5f7f | 275 | |
7f6ddf58 | 276 | |
88cb7938 | 277 | if (itsl->TreeT() == 0x0) itsl->MakeTree("T"); |
278 | ||
279 | TTree& itsTree = *itsl->TreeT(); | |
006b5f7f | 280 | AliITStrackV2 *otrack=&fBestTrack; |
88cb7938 | 281 | |
006b5f7f | 282 | itsTree.Branch("tracks","AliITStrackV2",&otrack,32000,0); |
283 | ||
7f6ddf58 | 284 | for (fPass=0; fPass<2; fPass++) { |
285 | Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue; | |
286 | for (Int_t i=0; i<nentr; i++) { | |
7f6ddf58 | 287 | AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i); |
288 | if (t==0) continue; //this track has been already tracked | |
289 | Int_t tpcLabel=t->GetLabel(); //save the TPC track label | |
a9a2d814 | 290 | |
4ab260d6 | 291 | ResetTrackToFollow(*t); |
7f6ddf58 | 292 | ResetBestTrack(); |
006b5f7f | 293 | |
88cb7938 | 294 | for (FollowProlongation(); fI<kMaxLayer; fI++) |
295 | { | |
296 | // Info("Clusters2Tracks","PASS%d track %d fI = %d",fPass,i,fI); | |
297 | while (TakeNextProlongation()) | |
298 | { | |
299 | // Info("Clusters2Tracks","Next Prolonagtion Taken"); | |
300 | FollowProlongation(); | |
301 | } | |
302 | } | |
006b5f7f | 303 | |
c0dd5278 | 304 | if (fBestTrack.GetNumberOfClusters() == 0) continue; |
8676d691 | 305 | |
306 | if (fConstraint[fPass]) { | |
88cb7938 | 307 | if (!RefitAt(3.7, t, &fBestTrack)) continue; |
8676d691 | 308 | } |
4ab260d6 | 309 | |
8676d691 | 310 | fBestTrack.SetLabel(tpcLabel); |
311 | fBestTrack.CookdEdx(); | |
312 | CookLabel(&fBestTrack,0.); //For comparison only | |
313 | itsTree.Fill(); | |
314 | UseClusters(&fBestTrack); | |
315 | delete itsTracks.RemoveAt(i); | |
7f6ddf58 | 316 | } |
006b5f7f | 317 | } |
006b5f7f | 318 | |
880f41b9 | 319 | nentr=(Int_t)itsTree.GetEntries(); |
320 | Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr); | |
8676d691 | 321 | |
88cb7938 | 322 | itsl->WriteTracks("OVERWRITE"); |
c7ee21ca | 323 | |
7f6ddf58 | 324 | itsTracks.Delete(); |
61ab8ea8 | 325 | |
326 | UnloadClusters(); | |
327 | ||
83d73500 | 328 | return 0; |
329 | } | |
330 | ||
88cb7938 | 331 | Int_t AliITStrackerV2::PropagateBack() { |
14825d5a | 332 | //-------------------------------------------------------------------- |
333 | //This functions propagates reconstructed ITS tracks back | |
334 | //-------------------------------------------------------------------- | |
8676d691 | 335 | if (LoadClusters()!=0) return 1; |
61ab8ea8 | 336 | |
88cb7938 | 337 | AliRunLoader* rl = AliRunLoader::GetRunLoader(fEvFolderName); |
338 | if (rl == 0x0) | |
339 | { | |
340 | Error("Clusters2Tracks","Can not get RL from specified folder %s",fEvFolderName.Data()); | |
341 | return 1; | |
342 | } | |
343 | rl->GetEvent(GetEventNumber()); | |
344 | AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader"); | |
345 | if (itsl == 0x0) | |
346 | { | |
347 | Error("LoadClusters","Can not get ITS loader."); | |
8676d691 | 348 | return 1; |
88cb7938 | 349 | } |
350 | ||
351 | if (itsl->TreeT() == 0x0) itsl->LoadTracks("read"); | |
352 | TTree *itsTree=itsl->TreeT(); | |
14825d5a | 353 | if (!itsTree) { |
8676d691 | 354 | Error("PropagateBack","can't get a tree with ITS tracks !\n"); |
355 | return 3; | |
14825d5a | 356 | } |
357 | AliITStrackV2 *itrack=new AliITStrackV2; | |
358 | itsTree->SetBranchAddress("tracks",&itrack); | |
359 | ||
88cb7938 | 360 | |
361 | itsl->MakeTree("B");//nake tree for back propagated tracks | |
362 | if (itsl->TreeB() == 0x0) | |
363 | { | |
364 | Error("PropagateBack","Can not create tree for back propagated tracks !\n"); | |
365 | return 3; | |
366 | } | |
367 | TTree &backTree = *itsl->TreeB(); | |
61ab8ea8 | 368 | |
14825d5a | 369 | AliTPCtrack *otrack=0; |
f29dbb4b | 370 | backTree.Branch("tracks","AliTPCtrack",&otrack,32000,2); |
14825d5a | 371 | |
14825d5a | 372 | Int_t nentr=(Int_t)itsTree->GetEntries(); |
880f41b9 | 373 | Int_t i; |
374 | for (i=0; i<nentr; i++) { | |
14825d5a | 375 | itsTree->GetEvent(i); |
880f41b9 | 376 | Int_t itsLabel=itrack->GetLabel(); //save the ITS track label |
14825d5a | 377 | ResetTrackToFollow(*itrack); |
f29dbb4b | 378 | |
379 | // propagete to vertex [SR, GSI 17.02.2003] | |
380 | fTrackToFollow.PropagateTo(3.,0.0028,65.19); | |
381 | fTrackToFollow.PropagateToVertex(); | |
382 | ||
383 | // Start Time measurement [SR, GSI 17.02.2003] | |
384 | fTrackToFollow.StartTimeIntegral(); | |
385 | fTrackToFollow.PropagateTo(3.,-0.0028,65.19); | |
386 | // | |
387 | ||
3a382e5c | 388 | fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters(); |
389 | if (!RefitAt(49.,&fTrackToFollow,itrack)) continue; | |
f29dbb4b | 390 | |
880f41b9 | 391 | if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) { |
392 | Warning("PropagateBack", | |
393 | "failed to correct for the material in the dead zone !\n"); | |
394 | continue; | |
395 | } | |
396 | ||
397 | fTrackToFollow.SetLabel(itsLabel); | |
398 | otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha()); | |
399 | backTree.Fill(); delete otrack; | |
400 | UseClusters(&fTrackToFollow); | |
401 | } | |
402 | i=(Int_t)backTree.GetEntries(); | |
88cb7938 | 403 | |
404 | ||
405 | itsl->WriteBackTracks("OVERWRITE"); | |
14825d5a | 406 | |
880f41b9 | 407 | Info("PropagateBack","Number of ITS tracks: %d\n",nentr); |
408 | Info("PropagateBack","Number of back propagated ITS tracks: %d\n",i); | |
f29dbb4b | 409 | |
880f41b9 | 410 | delete itrack; |
88cb7938 | 411 | |
412 | itsl->UnloadTracks(); | |
413 | itsl->UnloadBackTracks(); | |
414 | ||
880f41b9 | 415 | UnloadClusters(); |
416 | ||
880f41b9 | 417 | return 0; |
418 | } | |
419 | ||
88cb7938 | 420 | Int_t AliITStrackerV2::RefitInward() { |
83d73500 | 421 | //-------------------------------------------------------------------- |
422 | // This functions refits ITS tracks using the | |
423 | // "inward propagated" TPC tracks | |
83d73500 | 424 | //-------------------------------------------------------------------- |
83d73500 | 425 | |
88cb7938 | 426 | //PH 19/05 This function has to be adapted to the NewIO |
427 | TFile * inp = 0x0; | |
428 | TFile * out = 0x0; | |
83d73500 | 429 | |
880f41b9 | 430 | TFile *in=(TFile*)inp; |
14825d5a | 431 | |
880f41b9 | 432 | if (LoadClusters()!=0) return 1; |
433 | ||
434 | if (!in->IsOpen()) { | |
435 | Error("RefitInward","file with inward TPC tracks is not open !\n"); | |
436 | return 2; | |
437 | } | |
438 | ||
439 | if (!out->IsOpen()) { | |
440 | Error("RefitInward","file for inward ITS tracks is not open !\n"); | |
441 | return 3; | |
442 | } | |
443 | ||
444 | Int_t i; | |
445 | ||
446 | //LUT used for the track matching (S.Radomski's idea) | |
447 | const Int_t nLab = 400000; // limit on the number of track labels | |
448 | Int_t lut[nLab]; | |
449 | for(i=0; i<nLab; i++) lut[i] = -1; | |
450 | ||
451 | Char_t tname[100]; | |
452 | ||
453 | TObjArray itsTracks(15000); | |
454 | {/* Read the ITS tracks */ | |
455 | sprintf(tname,"TreeT_ITS_%d",GetEventNumber()); | |
456 | TTree *itsTree=(TTree*)out->Get(tname); | |
457 | if (!itsTree) { | |
458 | Error("RefitInward","can't get a tree with ITS tracks !\n"); | |
459 | return 3; | |
14825d5a | 460 | } |
880f41b9 | 461 | AliITStrackV2 *itrack=new AliITStrackV2; |
462 | itsTree->SetBranchAddress("tracks",&itrack); | |
463 | Int_t nits=(Int_t)itsTree->GetEntries(); | |
464 | ||
465 | Info("RefitInward","Number of ITS tracks: %d\n",nits); | |
466 | ||
467 | for (Int_t i=0; i<nits; i++) { | |
468 | itsTree->GetEvent(i); | |
469 | Int_t lab=TMath::Abs(itrack->GetLabel()); | |
470 | if (lab < nLab) { | |
471 | if (lut[lab]>=0) Warning("RefitInward","double track %d\n",lab); | |
472 | lut[lab]=i; | |
473 | } else { | |
474 | Warning("RefitInward","Too big ITS track label: %d\n!",lab); | |
475 | continue; | |
476 | } | |
477 | itsTracks.AddLast(new AliITStrackV2(*itrack)); | |
14825d5a | 478 | } |
880f41b9 | 479 | delete itsTree; |
480 | delete itrack; | |
14825d5a | 481 | } |
482 | ||
880f41b9 | 483 | out->cd(); |
484 | ||
485 | //Create the output tree | |
486 | sprintf(tname,"TreeT_ITSinward_%d",GetEventNumber()); | |
487 | TTree outTree(tname,"Tree with inward refitted ITS tracks"); | |
488 | AliITStrackV2 *otrack=0; | |
489 | outTree.Branch("tracks","AliITStrackV2",&otrack,32000,0); | |
490 | ||
491 | //Get the input tree | |
492 | sprintf(tname,"tracksTPC_%d",GetEventNumber()); | |
493 | TTree *tpcTree=(TTree*)in->Get(tname); | |
494 | if (!tpcTree) { | |
495 | Error("RefitInward","can't get a tree with TPC tracks !\n"); | |
496 | return 3; | |
497 | } | |
498 | AliTPCtrack *itrack=new AliTPCtrack; | |
499 | tpcTree->SetBranchAddress("tracks",&itrack); | |
500 | Int_t ntpc=(Int_t)tpcTree->GetEntries(); | |
61ab8ea8 | 501 | |
880f41b9 | 502 | Info("RefitInward","Number of TPC tracks: %d\n",ntpc); |
14825d5a | 503 | |
880f41b9 | 504 | for (i=0; i<ntpc; i++) { |
505 | tpcTree->GetEvent(i); | |
88cb7938 | 506 | AliITStrackV2 *t=0; |
880f41b9 | 507 | try { |
88cb7938 | 508 | t=new AliITStrackV2(*itrack); |
880f41b9 | 509 | } catch (const Char_t *msg) { |
510 | Warning("RefitInward",msg); | |
88cb7938 | 511 | delete t; |
880f41b9 | 512 | continue; |
513 | } | |
514 | //check if this track was reconstructed in the ITS | |
88cb7938 | 515 | Int_t lab=TMath::Abs(t->GetLabel()); |
880f41b9 | 516 | if (lab >= nLab) { |
517 | Warning("RefitInward","Too big TPC track label: %d\n!",lab); | |
518 | continue; | |
519 | } | |
520 | Int_t idx=lut[lab]; | |
521 | if (idx<0) continue; //no prolongation in the ITS for this track | |
522 | ||
88cb7938 | 523 | if (CorrectForDeadZoneMaterial(t)!=0) { |
880f41b9 | 524 | Warning("RefitInward", |
525 | "failed to correct for the material in the dead zone !\n"); | |
526 | continue; | |
527 | } | |
14825d5a | 528 | |
880f41b9 | 529 | //Refitting... |
88cb7938 | 530 | otrack=(AliITStrackV2*)itsTracks.UncheckedAt(idx); |
531 | if (!RefitAt(3.7, t, otrack)) continue; | |
880f41b9 | 532 | otrack->SetLabel(itrack->GetLabel()); //For comparison only |
533 | otrack->CookdEdx(); | |
534 | CookLabel(otrack,0.); //For comparison only | |
535 | outTree.Fill(); | |
88cb7938 | 536 | delete t; |
880f41b9 | 537 | } |
538 | i=(Int_t)outTree.GetEntries(); | |
539 | Info("RefitInward","Number of inward refitted ITS tracks: %d\n",i); | |
540 | outTree.Write(); | |
c7ee21ca | 541 | |
880f41b9 | 542 | delete tpcTree; |
543 | delete itrack; | |
61ab8ea8 | 544 | |
88cb7938 | 545 | itsTracks.Delete(); |
61ab8ea8 | 546 | |
14825d5a | 547 | return 0; |
548 | } | |
006b5f7f | 549 | |
550 | AliCluster *AliITStrackerV2::GetCluster(Int_t index) const { | |
551 | //-------------------------------------------------------------------- | |
552 | // Return pointer to a given cluster | |
553 | //-------------------------------------------------------------------- | |
554 | Int_t l=(index & 0xf0000000) >> 28; | |
555 | Int_t c=(index & 0x0fffffff) >> 00; | |
556 | return fLayers[l].GetCluster(c); | |
557 | } | |
558 | ||
559 | ||
560 | void AliITStrackerV2::FollowProlongation() { | |
561 | //-------------------------------------------------------------------- | |
562 | //This function finds a track prolongation | |
563 | //-------------------------------------------------------------------- | |
c0dd5278 | 564 | while (fI>fLastLayerToTrackTo) { |
a9a2d814 | 565 | Int_t i=fI-1; |
8676d691 | 566 | |
a9a2d814 | 567 | AliITSlayer &layer=fLayers[i]; |
568 | AliITStrackV2 &track=fTracks[i]; | |
006b5f7f | 569 | |
14825d5a | 570 | Double_t r=layer.GetR(); |
61ab8ea8 | 571 | |
a9a2d814 | 572 | if (i==3 || i==1) { |
573 | Double_t rs=0.5*(fLayers[i+1].GetR() + r); | |
61ab8ea8 | 574 | Double_t d=0.0034, x0=38.6; |
575 | if (i==1) {rs=9.; d=0.0097; x0=42;} | |
576 | if (!fTrackToFollow.PropagateTo(rs,d,x0)) { | |
8676d691 | 577 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 578 | return; |
a9a2d814 | 579 | } |
006b5f7f | 580 | } |
581 | ||
582 | //find intersection | |
583 | Double_t x,y,z; | |
14825d5a | 584 | if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) { |
8676d691 | 585 | //Warning("FollowProlongation","failed to estimate track !\n"); |
c0dd5278 | 586 | return; |
006b5f7f | 587 | } |
588 | Double_t phi=TMath::ATan2(y,x); | |
006b5f7f | 589 | Int_t idet=layer.FindDetectorIndex(phi,z); |
590 | if (idet<0) { | |
8676d691 | 591 | //Warning("FollowProlongation","failed to find a detector !\n"); |
c0dd5278 | 592 | return; |
006b5f7f | 593 | } |
594 | ||
595 | //propagate to the intersection | |
596 | const AliITSdetector &det=layer.GetDetector(idet); | |
14825d5a | 597 | phi=det.GetPhi(); |
a9a2d814 | 598 | if (!fTrackToFollow.Propagate(phi,det.GetR())) { |
8676d691 | 599 | //Warning("FollowProlongation","propagation failed !\n"); |
c0dd5278 | 600 | return; |
006b5f7f | 601 | } |
602 | fTrackToFollow.SetDetectorIndex(idet); | |
603 | ||
604 | //Select possible prolongations and store the current track estimation | |
605 | track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow); | |
8676d691 | 606 | Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); |
607 | Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); | |
608 | Double_t road=layer.GetRoad(); | |
609 | if (dz*dy>road*road) { | |
610 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
611 | dz=road*scz; dy=road*scy; | |
612 | } | |
b87bd7cd | 613 | |
614 | //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]); | |
14825d5a | 615 | if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl()); |
7f6ddf58 | 616 | if (dz > kMaxRoad) { |
8676d691 | 617 | //Warning("FollowProlongation","too broad road in Z !\n"); |
c0dd5278 | 618 | return; |
006b5f7f | 619 | } |
a9a2d814 | 620 | |
c0dd5278 | 621 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return; |
a9a2d814 | 622 | |
b87bd7cd | 623 | //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]); |
14825d5a | 624 | if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp()); |
7f6ddf58 | 625 | if (dy > kMaxRoad) { |
8676d691 | 626 | //Warning("FollowProlongation","too broad road in Y !\n"); |
c0dd5278 | 627 | return; |
006b5f7f | 628 | } |
a9a2d814 | 629 | |
7f6ddf58 | 630 | Double_t zmin=track.GetZ() - dz; |
006b5f7f | 631 | Double_t zmax=track.GetZ() + dz; |
14825d5a | 632 | Double_t ymin=track.GetY() + r*phi - dy; |
633 | Double_t ymax=track.GetY() + r*phi + dy; | |
a9a2d814 | 634 | layer.SelectClusters(zmin,zmax,ymin,ymax); |
635 | fI--; | |
006b5f7f | 636 | |
006b5f7f | 637 | //take another prolongation |
c0dd5278 | 638 | if (!TakeNextProlongation()) |
639 | if (fLayersNotToSkip[fI]) return; | |
006b5f7f | 640 | |
641 | } | |
642 | ||
643 | //deal with the best track | |
644 | Int_t ncl=fTrackToFollow.GetNumberOfClusters(); | |
645 | Int_t nclb=fBestTrack.GetNumberOfClusters(); | |
646 | if (ncl) | |
647 | if (ncl >= nclb) { | |
648 | Double_t chi2=fTrackToFollow.GetChi2(); | |
649 | if (chi2/ncl < kChi2PerCluster) { | |
650 | if (ncl > nclb || chi2 < fBestTrack.GetChi2()) { | |
651 | ResetBestTrack(); | |
652 | } | |
653 | } | |
654 | } | |
655 | ||
006b5f7f | 656 | } |
657 | ||
006b5f7f | 658 | Int_t AliITStrackerV2::TakeNextProlongation() { |
659 | //-------------------------------------------------------------------- | |
a9a2d814 | 660 | // This function takes another track prolongation |
661 | // | |
662 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
006b5f7f | 663 | //-------------------------------------------------------------------- |
006b5f7f | 664 | AliITSlayer &layer=fLayers[fI]; |
4ab260d6 | 665 | ResetTrackToFollow(fTracks[fI]); |
006b5f7f | 666 | |
b87bd7cd | 667 | Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]); |
668 | Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]); | |
8676d691 | 669 | Double_t road=layer.GetRoad(); |
670 | if (dz*dy>road*road) { | |
671 | Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd; | |
672 | dz=road*scz; dy=road*scy; | |
673 | } | |
006b5f7f | 674 | |
675 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
676 | Double_t chi2=12345.; | |
677 | while ((c=layer.GetNextCluster(ci))!=0) { | |
006b5f7f | 678 | Int_t idet=c->GetDetectorIndex(); |
679 | ||
4ab260d6 | 680 | if (fTrackToFollow.GetDetectorIndex()!=idet) { |
006b5f7f | 681 | const AliITSdetector &det=layer.GetDetector(idet); |
4ab260d6 | 682 | ResetTrackToFollow(fTracks[fI]); |
683 | if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) { | |
8676d691 | 684 | //Warning("TakeNextProlongation","propagation failed !\n"); |
006b5f7f | 685 | continue; |
686 | } | |
4ab260d6 | 687 | fTrackToFollow.SetDetectorIndex(idet); |
688 | if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue; | |
006b5f7f | 689 | } |
690 | ||
4ab260d6 | 691 | if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue; |
692 | if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue; | |
006b5f7f | 693 | |
4ab260d6 | 694 | chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break; |
006b5f7f | 695 | } |
696 | ||
006b5f7f | 697 | if (chi2>=kMaxChi2) return 0; |
698 | if (!c) return 0; | |
699 | ||
006b5f7f | 700 | if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) { |
8676d691 | 701 | //Warning("TakeNextProlongation","filtering failed !\n"); |
006b5f7f | 702 | return 0; |
703 | } | |
23efe5f1 | 704 | |
4ab260d6 | 705 | if (fTrackToFollow.GetNumberOfClusters()>1) |
706 | if (TMath::Abs(fTrackToFollow.GetD())>4) return 0; | |
707 | ||
a9a2d814 | 708 | fTrackToFollow. |
709 | SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b. | |
710 | ||
711 | { | |
880f41b9 | 712 | Double_t x0; |
61ab8ea8 | 713 | Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0); |
880f41b9 | 714 | fTrackToFollow.CorrectForMaterial(d,x0); |
a9a2d814 | 715 | } |
4ab260d6 | 716 | |
a9a2d814 | 717 | if (fConstraint[fPass]) { |
4ab260d6 | 718 | Double_t d=GetEffectiveThickness(0,0); //Think of this !!!! |
8676d691 | 719 | Double_t xyz[]={GetX(),GetY(),GetZ()}; |
720 | Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()}; | |
721 | fTrackToFollow.Improve(d,xyz,ers); | |
a9a2d814 | 722 | } |
006b5f7f | 723 | |
006b5f7f | 724 | return 1; |
725 | } | |
726 | ||
727 | ||
006b5f7f | 728 | AliITStrackerV2::AliITSlayer::AliITSlayer() { |
729 | //-------------------------------------------------------------------- | |
730 | //default AliITSlayer constructor | |
731 | //-------------------------------------------------------------------- | |
732 | fN=0; | |
733 | fDetectors=0; | |
734 | } | |
735 | ||
736 | AliITStrackerV2::AliITSlayer:: | |
737 | AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) { | |
738 | //-------------------------------------------------------------------- | |
739 | //main AliITSlayer constructor | |
740 | //-------------------------------------------------------------------- | |
741 | fR=r; fPhiOffset=p; fZOffset=z; | |
742 | fNladders=nl; fNdetectors=nd; | |
743 | fDetectors=new AliITSdetector[fNladders*fNdetectors]; | |
744 | ||
745 | fN=0; | |
746 | fI=0; | |
b87bd7cd | 747 | |
748 | fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster | |
006b5f7f | 749 | } |
750 | ||
751 | AliITStrackerV2::AliITSlayer::~AliITSlayer() { | |
752 | //-------------------------------------------------------------------- | |
753 | // AliITSlayer destructor | |
754 | //-------------------------------------------------------------------- | |
755 | delete[] fDetectors; | |
756 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
757 | } | |
758 | ||
61ab8ea8 | 759 | void AliITStrackerV2::AliITSlayer::ResetClusters() { |
760 | //-------------------------------------------------------------------- | |
761 | // This function removes loaded clusters | |
762 | //-------------------------------------------------------------------- | |
763 | for (Int_t i=0; i<fN; i++) delete fClusters[i]; | |
764 | fN=0; | |
765 | fI=0; | |
766 | } | |
767 | ||
b87bd7cd | 768 | void AliITStrackerV2::AliITSlayer::ResetRoad() { |
769 | //-------------------------------------------------------------------- | |
770 | // This function calculates the road defined by the cluster density | |
771 | //-------------------------------------------------------------------- | |
772 | Int_t n=0; | |
773 | for (Int_t i=0; i<fN; i++) { | |
774 | if (TMath::Abs(fClusters[i]->GetZ())<fR) n++; | |
775 | } | |
776 | if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n); | |
777 | } | |
778 | ||
006b5f7f | 779 | Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSclusterV2 *c) { |
780 | //-------------------------------------------------------------------- | |
781 | //This function adds a cluster to this layer | |
782 | //-------------------------------------------------------------------- | |
783 | if (fN==kMaxClusterPerLayer) { | |
8676d691 | 784 | ::Error("InsertCluster","Too many clusters !\n"); |
785 | return 1; | |
006b5f7f | 786 | } |
787 | ||
788 | if (fN==0) {fClusters[fN++]=c; return 0;} | |
789 | Int_t i=FindClusterIndex(c->GetZ()); | |
790 | memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*)); | |
791 | fClusters[i]=c; fN++; | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | Int_t AliITStrackerV2::AliITSlayer::FindClusterIndex(Double_t z) const { | |
797 | //-------------------------------------------------------------------- | |
798 | // This function returns the index of the nearest cluster | |
799 | //-------------------------------------------------------------------- | |
800 | if (fN==0) return 0; | |
801 | if (z <= fClusters[0]->GetZ()) return 0; | |
802 | if (z > fClusters[fN-1]->GetZ()) return fN; | |
803 | Int_t b=0, e=fN-1, m=(b+e)/2; | |
804 | for (; b<e; m=(b+e)/2) { | |
805 | if (z > fClusters[m]->GetZ()) b=m+1; | |
806 | else e=m; | |
807 | } | |
808 | return m; | |
809 | } | |
810 | ||
811 | void AliITStrackerV2::AliITSlayer:: | |
812 | SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) { | |
813 | //-------------------------------------------------------------------- | |
814 | // This function sets the "window" | |
815 | //-------------------------------------------------------------------- | |
816 | fI=FindClusterIndex(zmin); fZmax=zmax; | |
14825d5a | 817 | Double_t circle=2*TMath::Pi()*fR; |
818 | if (ymax>circle) { ymax-=circle; ymin-=circle; } | |
006b5f7f | 819 | fYmin=ymin; fYmax=ymax; |
820 | } | |
821 | ||
822 | const AliITSclusterV2 *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){ | |
823 | //-------------------------------------------------------------------- | |
824 | // This function returns clusters within the "window" | |
825 | //-------------------------------------------------------------------- | |
826 | const AliITSclusterV2 *cluster=0; | |
827 | for (Int_t i=fI; i<fN; i++) { | |
828 | const AliITSclusterV2 *c=fClusters[i]; | |
829 | if (c->GetZ() > fZmax) break; | |
830 | if (c->IsUsed()) continue; | |
831 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); | |
832 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
833 | ||
834 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
835 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
836 | ||
837 | if (y<fYmin) continue; | |
838 | if (y>fYmax) continue; | |
839 | cluster=c; ci=i; | |
840 | fI=i+1; | |
841 | break; | |
842 | } | |
7f6ddf58 | 843 | |
006b5f7f | 844 | return cluster; |
845 | } | |
846 | ||
847 | Int_t AliITStrackerV2::AliITSlayer:: | |
848 | FindDetectorIndex(Double_t phi, Double_t z) const { | |
849 | //-------------------------------------------------------------------- | |
850 | //This function finds the detector crossed by the track | |
851 | //-------------------------------------------------------------------- | |
852 | Double_t dphi=phi-fPhiOffset; | |
853 | if (dphi < 0) dphi += 2*TMath::Pi(); | |
854 | else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi(); | |
855 | Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5); | |
3e3e8427 | 856 | if (np>=fNladders) np-=fNladders; |
857 | if (np<0) np+=fNladders; | |
006b5f7f | 858 | |
859 | Double_t dz=fZOffset-z; | |
860 | Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5); | |
3e3e8427 | 861 | if (nz>=fNdetectors) return -1; |
862 | if (nz<0) return -1; | |
006b5f7f | 863 | |
88cb7938 | 864 | #ifdef DEBUG |
865 | cout<<np<<' '<<nz<<endl; | |
866 | #endif | |
867 | ||
006b5f7f | 868 | return np*fNdetectors + nz; |
869 | } | |
870 | ||
871 | Double_t | |
61ab8ea8 | 872 | AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0) |
873 | const { | |
a9a2d814 | 874 | //-------------------------------------------------------------------- |
875 | //This function returns the layer thickness at this point (units X0) | |
876 | //-------------------------------------------------------------------- | |
877 | Double_t d=0.0085; | |
61ab8ea8 | 878 | x0=21.82; |
a9a2d814 | 879 | |
880 | if (43<fR&&fR<45) { //SSD2 | |
61ab8ea8 | 881 | Double_t dd=0.0034; |
882 | d=dd; | |
883 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
884 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
885 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 886 | for (Int_t i=0; i<12; i++) { |
61ab8ea8 | 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+3.9*(i+0.5))<0.15) { | |
893 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
894 | d+=0.0034; | |
895 | break; | |
896 | } | |
897 | if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
898 | if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 899 | } |
900 | } else | |
901 | if (37<fR&&fR<41) { //SSD1 | |
61ab8ea8 | 902 | Double_t dd=0.0034; |
903 | d=dd; | |
904 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
905 | if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);} | |
906 | if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);} | |
a9a2d814 | 907 | for (Int_t i=0; i<11; i++) { |
61ab8ea8 | 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+3.9*i)<0.15) { | |
914 | if (TMath::Abs(y-0.00)>3.40) d+=dd; | |
915 | d+=dd; | |
916 | break; | |
917 | } | |
918 | if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
919 | if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;} | |
a9a2d814 | 920 | } |
921 | } else | |
922 | if (13<fR&&fR<26) { //SDD | |
61ab8ea8 | 923 | Double_t dd=0.0033; |
924 | d=dd; | |
925 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
926 | ||
927 | if (TMath::Abs(y-1.80)<0.55) { | |
928 | d+=0.016; | |
929 | for (Int_t j=0; j<20; j++) { | |
930 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
931 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
932 | } | |
933 | } | |
934 | if (TMath::Abs(y+1.80)<0.55) { | |
935 | d+=0.016; | |
936 | for (Int_t j=0; j<20; j++) { | |
937 | if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
938 | if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;} | |
939 | } | |
940 | } | |
941 | ||
942 | for (Int_t i=0; i<4; i++) { | |
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 | } | |
948 | if (TMath::Abs(z+7.3*i)<0.60) { | |
949 | d+=dd; | |
950 | if (TMath::Abs(y-0.00)>3.30) d+=dd; | |
951 | break; | |
952 | } | |
a9a2d814 | 953 | } |
954 | } else | |
955 | if (6<fR&&fR<8) { //SPD2 | |
61ab8ea8 | 956 | Double_t dd=0.0063; x0=21.5; |
957 | d=dd; | |
958 | if (TMath::Abs(y-3.08)>0.5) d+=dd; | |
959 | //if (TMath::Abs(y-3.08)>0.45) d+=dd; | |
960 | if (TMath::Abs(y-3.03)<0.10) {d+=0.014;} | |
a9a2d814 | 961 | } else |
962 | if (3<fR&&fR<5) { //SPD1 | |
61ab8ea8 | 963 | Double_t dd=0.0063; x0=21.5; |
964 | d=dd; | |
965 | if (TMath::Abs(y+0.21)>0.6) d+=dd; | |
966 | //if (TMath::Abs(y+0.21)>0.45) d+=dd; | |
967 | if (TMath::Abs(y+0.10)<0.10) {d+=0.014;} | |
a9a2d814 | 968 | } |
969 | ||
a9a2d814 | 970 | return d; |
971 | } | |
006b5f7f | 972 | |
a9a2d814 | 973 | Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const |
006b5f7f | 974 | { |
975 | //-------------------------------------------------------------------- | |
a9a2d814 | 976 | //Returns the thickness between the current layer and the vertex (units X0) |
006b5f7f | 977 | //-------------------------------------------------------------------- |
61ab8ea8 | 978 | Double_t d=0.0028*3*3; //beam pipe |
979 | Double_t x0=0; | |
006b5f7f | 980 | |
981 | Double_t xn=fLayers[fI].GetR(); | |
982 | for (Int_t i=0; i<fI; i++) { | |
983 | Double_t xi=fLayers[i].GetR(); | |
61ab8ea8 | 984 | d+=fLayers[i].GetThickness(y,z,x0)*xi*xi; |
006b5f7f | 985 | } |
986 | ||
987 | if (fI>1) { | |
61ab8ea8 | 988 | Double_t xi=9.; |
989 | d+=0.0097*xi*xi; | |
006b5f7f | 990 | } |
991 | ||
992 | if (fI>3) { | |
993 | Double_t xi=0.5*(fLayers[3].GetR()+fLayers[4].GetR()); | |
61ab8ea8 | 994 | d+=0.0034*xi*xi; |
006b5f7f | 995 | } |
61ab8ea8 | 996 | |
006b5f7f | 997 | return d/(xn*xn); |
998 | } | |
999 | ||
006b5f7f | 1000 | Int_t AliITStrackerV2::AliITSlayer::InRoad() const { |
1001 | //-------------------------------------------------------------------- | |
1002 | // This function returns number of clusters within the "window" | |
1003 | //-------------------------------------------------------------------- | |
1004 | Int_t ncl=0; | |
1005 | for (Int_t i=fI; i<fN; i++) { | |
1006 | const AliITSclusterV2 *c=fClusters[i]; | |
1007 | if (c->GetZ() > fZmax) break; | |
a9a2d814 | 1008 | if (c->IsUsed()) continue; |
006b5f7f | 1009 | const AliITSdetector &det=GetDetector(c->GetDetectorIndex()); |
1010 | Double_t y=fR*det.GetPhi() + c->GetY(); | |
1011 | ||
1012 | if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi(); | |
1013 | if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi(); | |
1014 | ||
1015 | if (y<fYmin) continue; | |
1016 | if (y>fYmax) continue; | |
1017 | ncl++; | |
1018 | } | |
1019 | return ncl; | |
1020 | } | |
1021 | ||
880f41b9 | 1022 | Bool_t |
88cb7938 | 1023 | AliITStrackerV2::RefitAt(Double_t x,const AliITStrackV2 *s,AliITStrackV2 *ot) { |
4ab260d6 | 1024 | //-------------------------------------------------------------------- |
88cb7938 | 1025 | // This function refits a track at a given position |
4ab260d6 | 1026 | //-------------------------------------------------------------------- |
88cb7938 | 1027 | AliITStrackV2 save(*ot), *t=&save; |
880f41b9 | 1028 | Int_t index[kMaxLayer]; |
1029 | Int_t k; | |
1030 | for (k=0; k<kMaxLayer; k++) index[k]=-1; | |
88cb7938 | 1031 | Int_t nc=t->GetNumberOfClusters(); |
880f41b9 | 1032 | for (k=0; k<nc; k++) { |
88cb7938 | 1033 | Int_t idx=t->GetClusterIndex(k),nl=(idx&0xf0000000)>>28; |
880f41b9 | 1034 | index[nl]=idx; |
1035 | } | |
88cb7938 | 1036 | t->~AliITStrackV2(); new (t) AliITStrackV2(*s); |
880f41b9 | 1037 | |
4ab260d6 | 1038 | Int_t from, to, step; |
1039 | if (x > t->GetX()) { | |
1040 | from=0; to=kMaxLayer; | |
1041 | step=+1; | |
1042 | } else { | |
1043 | from=kMaxLayer-1; to=-1; | |
1044 | step=-1; | |
1045 | } | |
1046 | ||
1047 | for (Int_t i=from; i != to; i += step) { | |
1048 | AliITSlayer &layer=fLayers[i]; | |
1049 | Double_t r=layer.GetR(); | |
1050 | ||
1051 | { | |
1052 | Double_t hI=i-0.5*step; | |
880f41b9 | 1053 | if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) { |
4ab260d6 | 1054 | Double_t rs=0.5*(fLayers[i-step].GetR() + r); |
61ab8ea8 | 1055 | Double_t d=0.0034, x0=38.6; |
880f41b9 | 1056 | if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;} |
1057 | if (!t->PropagateTo(rs,-step*d,x0)) { | |
4ab260d6 | 1058 | return kFALSE; |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
880f41b9 | 1063 | // remember old position [SR, GSI 18.02.2003] |
1064 | Double_t oldX=0., oldY=0., oldZ=0.; | |
1065 | if (t->IsStartedTimeIntegral() && step==1) { | |
1066 | t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ); | |
1067 | } | |
1068 | // | |
1069 | ||
4ab260d6 | 1070 | Double_t x,y,z; |
1071 | if (!t->GetGlobalXYZat(r,x,y,z)) { | |
1072 | return kFALSE; | |
1073 | } | |
1074 | Double_t phi=TMath::ATan2(y,x); | |
1075 | Int_t idet=layer.FindDetectorIndex(phi,z); | |
1076 | if (idet<0) { | |
1077 | return kFALSE; | |
1078 | } | |
1079 | const AliITSdetector &det=layer.GetDetector(idet); | |
1080 | phi=det.GetPhi(); | |
1081 | if (!t->Propagate(phi,det.GetR())) { | |
1082 | return kFALSE; | |
1083 | } | |
1084 | t->SetDetectorIndex(idet); | |
1085 | ||
1086 | const AliITSclusterV2 *cl=0; | |
1087 | Double_t maxchi2=kMaxChi2; | |
1088 | ||
1089 | Int_t idx=index[i]; | |
1090 | if (idx>0) { | |
1091 | const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx); | |
1092 | if (idet != c->GetDetectorIndex()) { | |
1093 | idet=c->GetDetectorIndex(); | |
1094 | const AliITSdetector &det=layer.GetDetector(idet); | |
1095 | if (!t->Propagate(det.GetPhi(),det.GetR())) { | |
1096 | return kFALSE; | |
1097 | } | |
1098 | t->SetDetectorIndex(idet); | |
1099 | } | |
1100 | Double_t chi2=t->GetPredictedChi2(c); | |
1101 | if (chi2<maxchi2) { cl=c; maxchi2=chi2; } | |
1102 | else return kFALSE; | |
1103 | } | |
4ab260d6 | 1104 | /* |
1105 | if (cl==0) | |
1106 | if (t->GetNumberOfClusters()>2) { | |
1107 | Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]); | |
1108 | Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]); | |
1109 | Double_t zmin=t->GetZ() - dz; | |
1110 | Double_t zmax=t->GetZ() + dz; | |
1111 | Double_t ymin=t->GetY() + phi*r - dy; | |
1112 | Double_t ymax=t->GetY() + phi*r + dy; | |
1113 | layer.SelectClusters(zmin,zmax,ymin,ymax); | |
1114 | ||
1115 | const AliITSclusterV2 *c=0; Int_t ci=-1; | |
1116 | while ((c=layer.GetNextCluster(ci))!=0) { | |
1117 | if (idet != c->GetDetectorIndex()) continue; | |
1118 | Double_t chi2=t->GetPredictedChi2(c); | |
1119 | if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; } | |
1120 | } | |
1121 | } | |
1122 | */ | |
4ab260d6 | 1123 | if (cl) { |
1124 | if (!t->Update(cl,maxchi2,idx)) { | |
1125 | return kFALSE; | |
1126 | } | |
880f41b9 | 1127 | t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1); |
4ab260d6 | 1128 | } |
1129 | ||
1130 | { | |
61ab8ea8 | 1131 | Double_t x0; |
1132 | Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0); | |
1133 | t->CorrectForMaterial(-step*d,x0); | |
4ab260d6 | 1134 | } |
880f41b9 | 1135 | |
1136 | // track time update [SR, GSI 17.02.2003] | |
1137 | if (t->IsStartedTimeIntegral() && step==1) { | |
1138 | Double_t newX, newY, newZ; | |
1139 | t->GetGlobalXYZat(t->GetX(),newX,newY,newZ); | |
1140 | Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) + | |
1141 | (oldZ-newZ)*(oldZ-newZ); | |
1142 | t->AddTimeStep(TMath::Sqrt(dL2)); | |
1143 | } | |
1144 | // | |
4ab260d6 | 1145 | |
1146 | } | |
1147 | ||
1148 | if (!t->PropagateTo(x,0.,0.)) return kFALSE; | |
88cb7938 | 1149 | ot->~AliITStrackV2(); new (ot) AliITStrackV2(*t); |
4ab260d6 | 1150 | return kTRUE; |
1151 | } | |
1152 | ||
b87bd7cd | 1153 | void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const { |
1154 | //-------------------------------------------------------------------- | |
1155 | // This function marks clusters assigned to the track | |
1156 | //-------------------------------------------------------------------- | |
1157 | AliTracker::UseClusters(t,from); | |
880f41b9 | 1158 | |
b87bd7cd | 1159 | AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0)); |
1160 | //if (c->GetQ()>2) c->Use(); | |
1161 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
1162 | c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1)); | |
1163 | //if (c->GetQ()>2) c->Use(); | |
1164 | if (c->GetSigmaZ2()>0.1) c->Use(); | |
880f41b9 | 1165 | |
b87bd7cd | 1166 | } |