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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-2003, 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 | /* $Id$ */ | |
17 | ||
18 | //////////////////////////////////////////////////// | |
19 | // Stand alone tracker class // | |
20 | // Origin: Elisabetta Crescio // | |
21 | // e-mail: crescio@to.infn.it // | |
22 | // tracks are saved as AliITStrackV2 objects // | |
23 | //////////////////////////////////////////////////// | |
24 | ||
25 | #include <stdlib.h> | |
26 | ||
27 | #include <TArrayI.h> | |
28 | #include <TBranch.h> | |
29 | #include <TObjArray.h> | |
30 | #include <TTree.h> | |
31 | ||
32 | #include "AliESDEvent.h" | |
33 | #include "AliESDVertex.h" | |
34 | #include "AliESDtrack.h" | |
35 | #include "AliITSVertexer.h" | |
36 | #include "AliITSclusterTable.h" | |
37 | #include "AliITSRecPoint.h" | |
38 | #include "AliITSgeomTGeo.h" | |
39 | #include "AliITStrackSA.h" | |
40 | #include "AliITStrackerSA.h" | |
41 | #include "AliITSReconstructor.h" | |
42 | #include "AliRun.h" | |
43 | ||
44 | ClassImp(AliITStrackerSA) | |
45 | ||
46 | //____________________________________________________________________________ | |
47 | AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(), | |
48 | fPhiEstimate(0), | |
49 | fITSStandAlone(0), | |
50 | fLambdac(0), | |
51 | fPhic(0), | |
52 | fCoef1(0), | |
53 | fCoef2(0), | |
54 | fCoef3(0), | |
55 | fNloop(0), | |
56 | fPhiWin(0), | |
57 | fLambdaWin(0), | |
58 | fVert(0), | |
59 | fVertexer(0), | |
60 | fListOfTracks(0), | |
61 | fITSclusters(0), | |
62 | fSixPoints(0), | |
63 | fOuterStartLayer(0), | |
64 | fCluLayer(0), | |
65 | fCluCoord(0){ | |
66 | // Default constructor | |
67 | Init(); | |
68 | ||
69 | } | |
70 | //____________________________________________________________________________ | |
71 | AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0), | |
72 | fPhiEstimate(0), | |
73 | fITSStandAlone(0), | |
74 | fLambdac(0), | |
75 | fPhic(0), | |
76 | fCoef1(0), | |
77 | fCoef2(0), | |
78 | fCoef3(0), | |
79 | fNloop(0), | |
80 | fPhiWin(0), | |
81 | fLambdaWin(0), | |
82 | fVert(0), | |
83 | fVertexer(0), | |
84 | fListOfTracks(0), | |
85 | fITSclusters(0), | |
86 | fSixPoints(0), | |
87 | fOuterStartLayer(0), | |
88 | fCluLayer(0), | |
89 | fCluCoord(0) | |
90 | { | |
91 | // Standard constructor (Vertex is known and passed to this obj.) | |
92 | if (geom) { | |
93 | AliWarning("\"geom\" is actually a dummy argument !"); | |
94 | } | |
95 | ||
96 | Init(); | |
97 | fVert = 0; | |
98 | ||
99 | } | |
100 | ||
101 | //____________________________________________________________________________ | |
102 | AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0), | |
103 | fPhiEstimate(0), | |
104 | fITSStandAlone(0), | |
105 | fLambdac(0), | |
106 | fPhic(0), | |
107 | fCoef1(0), | |
108 | fCoef2(0), | |
109 | fCoef3(0), | |
110 | fNloop(0), | |
111 | fPhiWin(0), | |
112 | fLambdaWin(0), | |
113 | fVert(vert), | |
114 | fVertexer(0), | |
115 | fListOfTracks(0), | |
116 | fITSclusters(0), | |
117 | fSixPoints(0), | |
118 | fOuterStartLayer(0), | |
119 | fCluLayer(0), | |
120 | fCluCoord(0) | |
121 | { | |
122 | // Standard constructor (Vertex is known and passed to this obj.) | |
123 | if (geom) { | |
124 | AliWarning("\"geom\" is actually a dummy argument !"); | |
125 | } | |
126 | Init(); | |
127 | ||
128 | } | |
129 | ||
130 | //____________________________________________________________________________ | |
131 | AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0), | |
132 | fPhiEstimate(0), | |
133 | fITSStandAlone(0), | |
134 | fLambdac(0), | |
135 | fPhic(0), | |
136 | fCoef1(0), | |
137 | fCoef2(0), | |
138 | fCoef3(0), | |
139 | fNloop(0), | |
140 | fPhiWin(0), | |
141 | fLambdaWin(0), | |
142 | fVert(), | |
143 | fVertexer(vertexer), | |
144 | fListOfTracks(0), | |
145 | fITSclusters(0), | |
146 | fSixPoints(0), | |
147 | fOuterStartLayer(0), | |
148 | fCluLayer(0), | |
149 | fCluCoord(0) | |
150 | { | |
151 | // Standard constructor (Vertex is unknown - vertexer is passed to this obj) | |
152 | if (geom) { | |
153 | AliWarning("\"geom\" is actually a dummy argument !"); | |
154 | } | |
155 | Init(); | |
156 | fVertexer = vertexer; | |
157 | ||
158 | } | |
159 | ||
160 | //____________________________________________________________________________ | |
161 | AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(), | |
162 | fPhiEstimate(tracker.fPhiEstimate), | |
163 | fITSStandAlone(tracker.fITSStandAlone), | |
164 | fLambdac(tracker.fLambdac), | |
165 | fPhic(tracker.fPhic), | |
166 | fCoef1(tracker.fCoef1), | |
167 | fCoef2(tracker.fCoef2), | |
168 | fCoef3(tracker.fCoef3), | |
169 | fNloop(tracker.fNloop), | |
170 | fPhiWin(tracker.fPhiWin), | |
171 | fLambdaWin(tracker.fLambdaWin), | |
172 | fVert(tracker.fVert), | |
173 | fVertexer(tracker.fVertexer), | |
174 | fListOfTracks(tracker.fListOfTracks), | |
175 | fITSclusters(tracker.fITSclusters), | |
176 | fSixPoints(tracker.fSixPoints), | |
177 | fOuterStartLayer(tracker.fOuterStartLayer), | |
178 | fCluLayer(tracker.fCluLayer), | |
179 | fCluCoord(tracker.fCluCoord) { | |
180 | // Copy constructor | |
181 | for(Int_t i=0;i<2;i++){ | |
182 | fPoint1[i]=tracker.fPoint1[i]; | |
183 | fPoint2[i]=tracker.fPoint2[i]; | |
184 | fPoint3[i]=tracker.fPoint3[i]; | |
185 | fPointc[i]=tracker.fPointc[i]; | |
186 | } | |
187 | if(tracker.fVertexer && tracker.fVert){ | |
188 | fVert = new AliESDVertex(*tracker.fVert); | |
189 | } | |
190 | else { | |
191 | fVert = tracker.fVert; | |
192 | } | |
193 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
194 | fCluLayer[i] = tracker.fCluLayer[i]; | |
195 | fCluCoord[i] = tracker.fCluCoord[i]; | |
196 | } | |
197 | } | |
198 | //______________________________________________________________________ | |
199 | AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){ | |
200 | // Assignment operator. | |
201 | this->~AliITStrackerSA(); | |
202 | new(this) AliITStrackerSA(source); | |
203 | return *this; | |
204 | ||
205 | } | |
206 | ||
207 | //____________________________________________________________________________ | |
208 | AliITStrackerSA::~AliITStrackerSA(){ | |
209 | // destructor | |
210 | // if fVertexer is not null, the AliESDVertex obj. is owned by this class | |
211 | // and is deleted here | |
212 | if(fVertexer){ | |
213 | if(fVert)delete fVert; | |
214 | } | |
215 | fVert = 0; | |
216 | fVertexer = 0; | |
217 | ||
218 | if(fPhiWin)delete []fPhiWin; | |
219 | if(fLambdaWin)delete []fLambdaWin; | |
220 | fListOfTracks->Delete(); | |
221 | delete fListOfTracks; | |
222 | if(fCluLayer){ | |
223 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
224 | if(fCluLayer[i]){ | |
225 | fCluLayer[i]->Delete(); | |
226 | delete fCluLayer[i]; | |
227 | } | |
228 | } | |
229 | delete [] fCluLayer; | |
230 | } | |
231 | if(fCluCoord){ | |
232 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
233 | if(fCluCoord[i]){ | |
234 | fCluCoord[i]->Delete(); | |
235 | delete fCluCoord[i]; | |
236 | } | |
237 | } | |
238 | delete [] fCluCoord; | |
239 | } | |
240 | ||
241 | } | |
242 | ||
243 | //____________________________________________________________________________ | |
244 | Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){ | |
245 | // This method is used to find and fit the tracks. By default the corresponding | |
246 | // method in the parent class is invoked. In this way a combined tracking | |
247 | // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking | |
248 | // is done in the ITS only. In the standard reconstruction chain this option | |
249 | // can be set via AliReconstruction::SetOption("ITS","onlyITS") | |
250 | Int_t rc=0; | |
251 | if(!fITSStandAlone){ | |
252 | rc=AliITStrackerMI::Clusters2Tracks(event); | |
253 | } | |
254 | else { | |
255 | AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n"); | |
256 | } | |
257 | if(!rc) rc=FindTracks(event); | |
258 | return rc; | |
259 | } | |
260 | ||
261 | //____________________________________________________________________________ | |
262 | void AliITStrackerSA::Init(){ | |
263 | // Reset all data members | |
264 | fPhiEstimate=0; | |
265 | for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;} | |
266 | fLambdac=0; | |
267 | fPhic=0; | |
268 | fCoef1=0; | |
269 | fCoef2=0; | |
270 | fCoef3=0; | |
271 | fPointc[0]=0; | |
272 | fPointc[1]=0; | |
273 | fVert = 0; | |
274 | fVertexer = 0; | |
275 | SetWindowSizes(); | |
276 | fITSclusters = 0; | |
277 | SetSixPoints(); | |
278 | SetOuterStartLayer(0); | |
279 | SetSAFlag(kFALSE); | |
280 | fListOfTracks=new TObjArray(0,0); | |
281 | fCluLayer = 0; | |
282 | fCluCoord = 0; | |
283 | } | |
284 | //_______________________________________________________________________ | |
285 | void AliITStrackerSA::ResetForFinding(){ | |
286 | // Reset data members used in all loops during track finding | |
287 | fPhiEstimate=0; | |
288 | for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;} | |
289 | fLambdac=0; | |
290 | fPhic=0; | |
291 | fCoef1=0; | |
292 | fCoef2=0; | |
293 | fCoef3=0; | |
294 | fPointc[0]=0; | |
295 | fPointc[1]=0; | |
296 | fListOfTracks->Delete(); | |
297 | } | |
298 | ||
299 | ||
300 | ||
301 | //______________________________________________________________________ | |
302 | Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){ | |
303 | ||
304 | // Track finder using the ESD object | |
305 | ||
306 | ||
307 | //controllare numero cluster sui layer1 e 2 (morti?) | |
308 | //non trova tracce...controllare.. | |
309 | ||
310 | if(!fITSclusters){ | |
311 | Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n"); | |
312 | return -1; | |
313 | } | |
314 | ||
315 | ||
316 | //Reads event and mark clusters of traks already found, with flag kITSin | |
317 | Int_t nentr=event->GetNumberOfTracks(); | |
318 | while (nentr--) { | |
319 | AliESDtrack *track=event->GetTrack(nentr); | |
320 | if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){ | |
321 | Int_t idx[12]; | |
322 | Int_t ncl = track->GetITSclusters(idx); | |
323 | for(Int_t k=0;k<ncl;k++){ | |
324 | AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]); | |
325 | cll->SetBit(kSAflag); | |
326 | } | |
327 | } | |
328 | } | |
329 | //Get primary vertex | |
330 | Double_t primaryVertex[3]; | |
331 | event->GetVertex()->GetXYZ(primaryVertex); | |
332 | //Creates TClonesArray with clusters for each layer. The clusters already used | |
333 | //by AliITStrackerMI are not considered | |
334 | Int_t nclusters[6]={0,0,0,0,0,0}; | |
335 | Int_t dmar[6]={0,0,0,0,0,0}; | |
336 | if (fCluLayer == 0) { | |
337 | fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()]; | |
338 | fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()]; | |
339 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) { | |
340 | fCluLayer[i]=0; | |
341 | fCluCoord[i]=0; | |
342 | } | |
343 | } | |
344 | Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
345 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
346 | firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1); | |
347 | AliITSlayer &layer=fgLayers[i]; | |
348 | if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) { | |
349 | for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){ | |
350 | AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli); | |
351 | if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol. | |
352 | if(cls->GetQ()==0) continue; //fake clusters dead zones | |
353 | nclusters[i]++; | |
354 | } | |
355 | } | |
356 | dmar[i]=0; | |
357 | delete fCluLayer[i]; | |
358 | fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]); | |
359 | delete fCluCoord[i]; | |
360 | fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]); | |
361 | } | |
362 | ||
363 | for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){ | |
364 | TClonesArray &clulay = *fCluLayer[ilay]; | |
365 | TClonesArray &clucoo = *fCluCoord[ilay]; | |
366 | AliITSlayer &layer=fgLayers[ilay]; | |
367 | if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilay)) { | |
368 | for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){ | |
369 | AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli); | |
370 | if(cls->TestBit(kSAflag)==kTRUE) continue; | |
371 | if(cls->GetQ()==0) continue; | |
372 | Double_t phi=0;Double_t lambda=0; | |
373 | Float_t x=0;Float_t y=0;Float_t z=0; | |
374 | Float_t sx=0;Float_t sy=0;Float_t sz=0; | |
375 | GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex); | |
376 | GetCoorErrors(cls,sx,sy,sz); | |
377 | new (clulay[dmar[ilay]]) AliITSRecPoint(*cls); | |
378 | new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli); | |
379 | dmar[ilay]++; | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
384 | Int_t minNPoints = (fSixPoints ? AliITSgeomTGeo::GetNLayers() : AliITSgeomTGeo::GetNLayers()-1); | |
385 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) { | |
386 | if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) { | |
387 | minNPoints--; | |
388 | } | |
389 | } | |
390 | ||
391 | ||
392 | Int_t ntrack=0; | |
393 | //loop on the different windows | |
394 | Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer | |
395 | for(Int_t nloop=0;nloop<fNloop;nloop++){ | |
396 | for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0 | |
397 | ||
398 | ResetForFinding(); | |
399 | Int_t pflag=0; | |
400 | ||
401 | AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl); | |
402 | ||
403 | if(!cl) continue; | |
404 | if (cl->GetQ()<=0) continue; | |
405 | ||
406 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl); | |
407 | fPhic = arr->GetPhi(); | |
408 | fLambdac = arr->GetLambda(); | |
409 | if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue; | |
410 | fPhiEstimate = fPhic; | |
411 | AliITStrackSA* trs = new AliITStrackSA(); | |
412 | fPoint1[0]=primaryVertex[0]; | |
413 | fPoint1[1]=primaryVertex[1]; | |
414 | ||
415 | ||
416 | fPoint2[0]=arr->GetX(); | |
417 | fPoint2[1]=arr->GetY(); | |
418 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;} | |
419 | nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
420 | nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
421 | if(nn[1]>0){ | |
422 | pflag=1; | |
423 | fPoint3[0] = fPointc[0]; | |
424 | fPoint3[1] = fPointc[1]; | |
425 | } | |
426 | nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
427 | if(nn[1]==0 && nn[2]==0) pflag=0; | |
428 | if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();} | |
429 | if(nn[2]!=0 && nn[1]==0){ | |
430 | pflag=1; | |
431 | fPoint3[0]=fPointc[0]; | |
432 | fPoint3[1]=fPointc[1]; | |
433 | } | |
434 | ||
435 | nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
436 | pflag=1; | |
437 | if(nn[3]!=0) UpdatePoints(); | |
438 | nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
439 | pflag=1; | |
440 | if(nn[4]!=0) UpdatePoints(); | |
441 | nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
442 | ||
443 | ||
444 | Int_t layOK=0; | |
445 | //check of the candidate track | |
446 | for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++) { | |
447 | if(nn[nnp]!=0) layOK+=1; | |
448 | } | |
449 | ||
450 | if(layOK>=minNPoints){ | |
451 | AliITStrackV2* tr2 = 0; | |
452 | tr2 = FitTrack(trs,primaryVertex); | |
453 | if(!tr2) continue; | |
454 | ||
455 | AliESDtrack outtrack; | |
456 | outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin); | |
457 | event->AddTrack(&outtrack); | |
458 | ntrack++; | |
459 | } | |
460 | delete trs; | |
461 | }//end loop on clusters of layer1 | |
462 | //end loop2 | |
463 | } | |
464 | ||
465 | delete[] nn; | |
466 | ||
467 | ||
468 | minNPoints--; | |
469 | ||
470 | //if 5/6 points are required, second loop starting | |
471 | //from second layer (SPD2), to find tracks with point of | |
472 | //layer 1 missing | |
473 | if(!fSixPoints) { | |
474 | //printf("looking from SPD2\n"); | |
475 | // counter for clusters on each layer | |
476 | Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1]; | |
477 | for(Int_t nloop=0;nloop<fNloop;nloop++){ | |
478 | Int_t ncl2=fCluLayer[1]->GetEntries(); | |
479 | while(ncl2--){ //loop starting from layer 2 | |
480 | ResetForFinding(); | |
481 | Int_t pflag=0; | |
482 | AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2); | |
483 | ||
484 | if(!cl) continue; | |
485 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2); | |
486 | fPhic = arr->GetPhi(); | |
487 | fLambdac = arr->GetLambda(); | |
488 | fPhiEstimate = fPhic; | |
489 | ||
490 | AliITStrackSA* trs = new AliITStrackSA(); | |
491 | fPoint1[0]=primaryVertex[0]; | |
492 | fPoint1[1]=primaryVertex[1]; | |
493 | ||
494 | fPoint2[0]=arr->GetX(); | |
495 | fPoint2[1]=arr->GetY(); | |
496 | for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0; | |
497 | nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop], | |
498 | trs,primaryVertex[2],pflag); | |
499 | nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop], | |
500 | trs,primaryVertex[2],pflag); | |
501 | if(nn[1]!=0){ | |
502 | pflag=1; | |
503 | fPoint3[0]=fPointc[0]; | |
504 | fPoint3[1]=fPointc[1]; | |
505 | } | |
506 | nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop], | |
507 | trs,primaryVertex[2],pflag); | |
508 | if(nn[2]!=0){ | |
509 | pflag=1; | |
510 | UpdatePoints(); | |
511 | } | |
512 | nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop], | |
513 | trs,primaryVertex[2],pflag); | |
514 | if(nn[3]!=0){ | |
515 | pflag=1; | |
516 | UpdatePoints(); | |
517 | } | |
518 | nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop], | |
519 | trs,primaryVertex[2],pflag); | |
520 | ||
521 | Int_t fl=0; | |
522 | for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){ | |
523 | if(nn[nnp]!=0) fl+=1; | |
524 | } | |
525 | if(fl>=minNPoints){ // 5/6 | |
526 | AliITStrackV2* tr2 = 0; | |
527 | tr2 = FitTrack(trs,primaryVertex); | |
528 | if(!tr2) continue; | |
529 | ||
530 | AliESDtrack outtrack; | |
531 | outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin); | |
532 | event->AddTrack(&outtrack); | |
533 | ntrack++; | |
534 | ||
535 | } | |
536 | ||
537 | delete trs; | |
538 | }//end loop on clusters of layer2 | |
539 | } | |
540 | ||
541 | delete [] nn; | |
542 | } //end opt="5/6" | |
543 | ||
544 | // search for tracks starting from SPD2, SDD1, SDD2, SSD2 | |
545 | // for cosmics (A. Dainese 31.07.07) | |
546 | if(fOuterStartLayer>0) { | |
547 | for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) { | |
548 | //printf("Searching from layer %d outward\n",innLay); | |
549 | minNPoints=AliITSgeomTGeo::GetNLayers()-innLay; | |
550 | for(Int_t i=innLay;i<AliITSgeomTGeo::GetNLayers();i++) | |
551 | if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) | |
552 | minNPoints--; | |
553 | // counter for clusters on each layer | |
554 | Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay]; | |
555 | for(Int_t nloop=0;nloop<fNloop;nloop++){ | |
556 | Int_t nclInnLay=fCluLayer[innLay]->GetEntries(); | |
557 | while(nclInnLay--){ //loop starting from layer innLay | |
558 | ResetForFinding(); | |
559 | Int_t pflag=0; | |
560 | AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay); | |
561 | ||
562 | if(!cl) continue; | |
563 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay); | |
564 | fPhic = arr->GetPhi(); | |
565 | fLambdac = arr->GetLambda(); | |
566 | fPhiEstimate = fPhic; | |
567 | ||
568 | AliITStrackSA* trs = new AliITStrackSA(); | |
569 | fPoint1[0]=primaryVertex[0]; | |
570 | fPoint1[1]=primaryVertex[1]; | |
571 | fPoint2[0]=arr->GetX(); | |
572 | fPoint2[1]=arr->GetY(); | |
573 | ||
574 | Int_t kk; | |
575 | for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0; | |
576 | ||
577 | kk=0; | |
578 | nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop], | |
579 | trs,primaryVertex[2],pflag); | |
580 | for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) { | |
581 | kk++; | |
582 | nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop], | |
583 | trs,primaryVertex[2],pflag); | |
584 | if(nn[kk]!=0){ | |
585 | pflag=1; | |
586 | if(kk==1) { | |
587 | fPoint3[0]=fPointc[0]; | |
588 | fPoint3[1]=fPointc[1]; | |
589 | } else { | |
590 | UpdatePoints(); | |
591 | } | |
592 | } | |
593 | } | |
594 | ||
595 | Int_t fl=0; | |
596 | for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){ | |
597 | if(nn[nnp]!=0) fl+=1; | |
598 | } | |
599 | if(fl>=minNPoints){ | |
600 | AliITStrackV2* tr2 = 0; | |
601 | tr2 = FitTrack(trs,primaryVertex); | |
602 | if(!tr2) continue; | |
603 | ||
604 | ||
605 | AliESDtrack outtrack; | |
606 | outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin); | |
607 | event->AddTrack(&outtrack); | |
608 | ntrack++; | |
609 | ||
610 | } | |
611 | ||
612 | delete trs; | |
613 | }//end loop on clusters of innLay | |
614 | } //end loop on window sizes | |
615 | ||
616 | delete [] nn; | |
617 | } //end loop on innLay | |
618 | } //end if(fOuterStartLayer>0) | |
619 | ||
620 | ||
621 | delete [] firstmod; | |
622 | Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks()); | |
623 | return 0; | |
624 | ||
625 | } | |
626 | ||
627 | //________________________________________________________________________ | |
628 | ||
629 | AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex) { | |
630 | //fit of the found track (most general case, also <6 points, layers missing) | |
631 | // A.Dainese 16.11.07 | |
632 | ||
633 | ||
634 | Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
635 | TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()]; | |
636 | Int_t ** clind=new Int_t*[AliITSgeomTGeo::GetNLayers()]; | |
637 | Int_t ** clmark=new Int_t*[AliITSgeomTGeo::GetNLayers()]; | |
638 | Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
639 | Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
640 | ||
641 | const Int_t maxclu=AliITStrackSA::GetMaxNumberOfClusters(); | |
642 | ||
643 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) { | |
644 | firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1); | |
645 | listlayer[i] = new TObjArray(0,0); | |
646 | nnn[i]=0; | |
647 | kkk[i]=0; | |
648 | clind[i]=new Int_t[maxclu]; | |
649 | clmark[i]=new Int_t[maxclu]; | |
650 | for(Int_t j=0;j<maxclu; j++){ | |
651 | clind[i][j]=0; | |
652 | clmark[i][j]=0; | |
653 | } | |
654 | } | |
655 | ||
656 | ||
657 | Int_t nclusters = tr->GetNumberOfClustersSA(); | |
658 | for(Int_t ncl=0;ncl<nclusters;ncl++){ | |
659 | Int_t index = tr->GetClusterIndexSA(ncl); | |
660 | AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index); | |
661 | if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag); | |
662 | Int_t lay = (index & 0xf0000000) >> 28; | |
663 | listlayer[lay]->AddLast(cl); | |
664 | Int_t ind=nnn[lay]; | |
665 | clind[lay][ind]=index; | |
666 | } | |
667 | delete [] nnn; | |
668 | ||
669 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
670 | for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){ | |
671 | Int_t mark = tr->GetClusterMark(nlay,ncl); | |
672 | Int_t ind=kkk[nlay]; | |
673 | clmark[nlay][ind]=mark; | |
674 | } | |
675 | } | |
676 | ||
677 | delete [] kkk; | |
678 | ||
679 | Int_t firstLay=-1,secondLay=-1; | |
680 | Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
681 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) { | |
682 | if(listlayer[i]->GetEntries()==0) { | |
683 | end[i]=1; | |
684 | } else { | |
685 | end[i]=listlayer[i]->GetEntries(); | |
686 | if(firstLay==-1) { | |
687 | firstLay=i; | |
688 | } else if(secondLay==-1) { | |
689 | secondLay=i; | |
690 | } | |
691 | } | |
692 | } | |
693 | ||
694 | if(firstLay==-1 || secondLay==-1) { | |
695 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
696 | delete listlayer[i]; | |
697 | delete clind[i]; | |
698 | delete clmark[i]; | |
699 | } | |
700 | delete [] listlayer; | |
701 | delete [] clind; | |
702 | delete [] clmark; | |
703 | delete [] firstmod; | |
704 | delete [] end; | |
705 | return 0; | |
706 | } | |
707 | ||
708 | TClonesArray* listSA = new TClonesArray("AliITStrackSA"); | |
709 | TClonesArray &tri = *listSA; | |
710 | Int_t nlist=0; | |
711 | ||
712 | for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1 | |
713 | AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l0); | |
714 | for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2 | |
715 | AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l1); | |
716 | for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3 | |
717 | AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l2); | |
718 | for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4 | |
719 | AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l3); | |
720 | for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5 | |
721 | AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l4); | |
722 | for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6 | |
723 | AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l5); | |
724 | ||
725 | ||
726 | Double_t x1,y1,z1,sx1,sy1,sz1; | |
727 | Double_t x2,y2,z2,sx2,sy2,sz2; | |
728 | AliITSRecPoint* p1=0; | |
729 | AliITSRecPoint* p2=0; | |
730 | Int_t index1=0,index2=0; | |
731 | Int_t mrk1=0,mrk2=0; | |
732 | ||
733 | switch(firstLay) { | |
734 | case 0: | |
735 | p1=cl0; | |
736 | index1=clind[0][l0];mrk1=clmark[0][l0]; | |
737 | break; | |
738 | case 1: | |
739 | p1=cl1; | |
740 | index1=clind[1][l1];mrk1=clmark[1][l1]; | |
741 | break; | |
742 | case 2: | |
743 | p1=cl2; | |
744 | index1=clind[2][l2];mrk1=clmark[2][l2]; | |
745 | break; | |
746 | case 3: | |
747 | p1=cl3; | |
748 | index1=clind[3][l3];mrk1=clmark[3][l3]; | |
749 | break; | |
750 | case 4: | |
751 | p1=cl4; | |
752 | index1=clind[4][l4];mrk1=clmark[4][l4]; | |
753 | break; | |
754 | } | |
755 | ||
756 | switch(secondLay) { | |
757 | case 1: | |
758 | p2=cl1; | |
759 | index2=clind[1][l1];mrk2=clmark[1][l1]; | |
760 | break; | |
761 | case 2: | |
762 | p2=cl2; | |
763 | index2=clind[2][l2];mrk2=clmark[2][l2]; | |
764 | break; | |
765 | case 3: | |
766 | p2=cl3; | |
767 | index2=clind[3][l3];mrk2=clmark[3][l3]; | |
768 | break; | |
769 | case 4: | |
770 | p2=cl4; | |
771 | index2=clind[4][l4];mrk2=clmark[4][l4]; | |
772 | break; | |
773 | case 5: | |
774 | p2=cl5; | |
775 | index2=clind[5][l5];mrk2=clmark[5][l5]; | |
776 | break; | |
777 | } | |
778 | ||
779 | Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay]; | |
780 | ||
781 | Int_t cln1=mrk1; | |
782 | Int_t cln2=mrk2; | |
783 | AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1); | |
784 | AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2); | |
785 | x1 = arr1->GetX(); | |
786 | x2 = arr2->GetX(); | |
787 | y1 = arr1->GetY(); | |
788 | y2 = arr2->GetY(); | |
789 | z1 = arr1->GetZ(); | |
790 | z2 = arr2->GetZ(); | |
791 | sx1 = arr1->GetSx(); | |
792 | sx2 = arr2->GetSx(); | |
793 | sy1 = arr1->GetSy(); | |
794 | sy2 = arr2->GetSy(); | |
795 | sz1 = arr1->GetSz(); | |
796 | sz2 = arr2->GetSz(); | |
797 | ||
798 | Int_t layer,ladder,detector; | |
799 | AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector); | |
800 | Float_t yclu1 = p1->GetY(); | |
801 | Float_t zclu1 = p1->GetZ(); | |
802 | Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2); | |
803 | Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); | |
804 | Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1)); | |
805 | AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1); | |
806 | ||
807 | ||
808 | if(cl5!=0) { | |
809 | trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0); | |
810 | trac->AddClusterMark(5,clmark[5][l5]); | |
811 | } | |
812 | if(cl4!=0){ | |
813 | trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0); | |
814 | trac->AddClusterMark(4,clmark[4][l4]); | |
815 | } | |
816 | if(cl3!=0){ | |
817 | trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0); | |
818 | trac->AddClusterMark(3,clmark[3][l3]); | |
819 | } | |
820 | if(cl2!=0){ | |
821 | trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0); | |
822 | trac->AddClusterMark(2,clmark[2][l2]); | |
823 | } | |
824 | if(cl1!=0){ | |
825 | trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0); | |
826 | trac->AddClusterMark(1,clmark[1][l1]); | |
827 | } | |
828 | if(cl0!=0){ | |
829 | trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0); | |
830 | trac->AddClusterMark(0,clmark[0][l0]); | |
831 | } | |
832 | ||
833 | //fit with Kalman filter using AliITStrackerMI::RefitAt() | |
834 | AliITStrackMI* ot = new AliITStrackSA(*trac); | |
835 | ||
836 | ot->ResetCovariance(10.); | |
837 | ot->ResetClusters(); | |
838 | ||
839 | if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6 | |
840 | AliITStrackMI *otrack2 = new AliITStrackMI(*ot); | |
841 | otrack2->ResetCovariance(10.); | |
842 | otrack2->ResetClusters(); | |
843 | //fit from layer 6 to layer 1 | |
844 | if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) { | |
845 | fListOfTracks->AddLast(otrack2); | |
846 | new (tri[nlist]) AliITStrackSA(*trac); | |
847 | nlist++; | |
848 | } else { | |
849 | delete otrack2; | |
850 | } | |
851 | ||
852 | } | |
853 | ||
854 | delete ot; | |
855 | delete trac; | |
856 | }//end loop layer 6 | |
857 | }//end loop layer 5 | |
858 | }//end loop layer 4 | |
859 | }//end loop layer 3 | |
860 | }//end loop layer 2 | |
861 | }//end loop layer 1 | |
862 | ||
863 | delete [] end; | |
864 | ||
865 | ||
866 | ||
867 | Int_t dim=fListOfTracks->GetEntries(); | |
868 | if(dim==0){ | |
869 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
870 | delete listlayer[i]; | |
871 | delete clind[i]; | |
872 | delete clmark[i]; | |
873 | } | |
874 | delete [] listlayer; | |
875 | delete [] clind; | |
876 | delete [] clmark; | |
877 | listSA->Delete(); | |
878 | delete listSA; | |
879 | delete [] firstmod; | |
880 | return 0; | |
881 | } | |
882 | ||
883 | Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim); | |
884 | AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2); | |
885 | AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2); | |
886 | ||
887 | if(otrack==0) { | |
888 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
889 | delete listlayer[i]; | |
890 | delete clind[i]; | |
891 | delete clmark[i]; | |
892 | } | |
893 | delete [] listlayer; | |
894 | delete [] clind; | |
895 | delete [] clmark; | |
896 | listSA->Delete(); | |
897 | delete listSA; | |
898 | delete [] firstmod; | |
899 | delete [] clind; | |
900 | delete [] clmark; | |
901 | return 0; | |
902 | } | |
903 | Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()]; | |
904 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0; | |
905 | for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){ | |
906 | indexc[nind] = otrack->GetClusterIndex(nind); | |
907 | } | |
908 | Int_t labl[6][3]; | |
909 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) { | |
910 | if(i<otrack->GetNumberOfClusters()) { | |
911 | AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]); | |
912 | labl[i][0]=cl->GetLabel(0); | |
913 | labl[i][1]=cl->GetLabel(1); | |
914 | labl[i][2]=cl->GetLabel(2); | |
915 | } else { | |
916 | labl[i][0]=-1; | |
917 | labl[i][1]=-1; | |
918 | labl[i][2]=-1; | |
919 | } | |
920 | } | |
921 | delete [] indexc; | |
922 | ||
923 | CookLabel(otrack,0.); //MI change - to see fake ratio | |
924 | ||
925 | Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]); | |
926 | Int_t lflag=0; | |
927 | for(Int_t i=0;i<otrack->GetNumberOfClusters();i++) | |
928 | if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++; | |
929 | ||
930 | if(lflag<otrack->GetNumberOfClusters()) label = -label; | |
931 | otrack->SetLabel(label); | |
932 | ||
933 | //remove clusters of found track | |
934 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
935 | for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){ | |
936 | Int_t index = trsa->GetClusterMark(nlay,cln); | |
937 | fCluLayer[nlay]->RemoveAt(index); | |
938 | RemoveClusterCoord(nlay,index); | |
939 | fCluLayer[nlay]->Compress(); | |
940 | } | |
941 | } | |
942 | listSA->Delete(); | |
943 | delete listSA; | |
944 | ||
945 | for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ | |
946 | delete listlayer[i]; | |
947 | delete clind[i]; | |
948 | delete clmark[i]; | |
949 | } | |
950 | delete [] listlayer; | |
951 | delete [] firstmod; | |
952 | delete [] clind; | |
953 | delete [] clmark; | |
954 | return otrack; | |
955 | ||
956 | } | |
957 | ||
958 | ||
959 | ||
960 | //_______________________________________________________ | |
961 | Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){ | |
962 | //function used to to find the clusters associated to the track | |
963 | ||
964 | if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(layer)) return 0; | |
965 | ||
966 | Int_t nc=0; | |
967 | AliITSlayer &lay = fgLayers[layer]; | |
968 | Double_t r=lay.GetR(); | |
969 | if(pflag==1){ | |
970 | Float_t cx1,cx2,cy1,cy2; | |
971 | FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3); | |
972 | if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0) | |
973 | return 0; | |
974 | Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]); | |
975 | Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]); | |
976 | fPhiEstimate=ChoosePoint(fi1,fi2,fPhic); | |
977 | } | |
978 | ||
979 | ||
980 | Int_t ncl = fCluLayer[layer]->GetEntries(); | |
981 | for (Int_t index=0; index<ncl; index++) { | |
982 | AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index); | |
983 | if (!c) continue; | |
984 | if (c->GetQ()<=0) continue; | |
985 | ||
986 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index); | |
987 | Double_t phi = arr->GetPhi(); | |
988 | if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue; | |
989 | ||
990 | Double_t lambda = arr->GetLambda(); | |
991 | if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue; | |
992 | ||
993 | if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0; | |
994 | if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0; | |
995 | Int_t orind = arr->GetOrInd(); | |
996 | trs->AddClusterSA(layer,orind); | |
997 | trs->AddClusterMark(layer,index); | |
998 | ||
999 | nc++; | |
1000 | fLambdac=lambda; | |
1001 | fPhiEstimate=phi; | |
1002 | ||
1003 | fPointc[0]=arr->GetX(); | |
1004 | fPointc[1]=arr->GetY(); | |
1005 | ||
1006 | } | |
1007 | return nc; | |
1008 | } | |
1009 | ||
1010 | //________________________________________________________________ | |
1011 | void AliITStrackerSA::UpdatePoints(){ | |
1012 | //update of points for the estimation of the curvature | |
1013 | ||
1014 | fPoint2[0]=fPoint3[0]; | |
1015 | fPoint2[1]=fPoint3[1]; | |
1016 | fPoint3[0]=fPointc[0]; | |
1017 | fPoint3[1]=fPointc[1]; | |
1018 | ||
1019 | ||
1020 | } | |
1021 | ||
1022 | //___________________________________________________________________ | |
1023 | Int_t AliITStrackerSA::FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2, Float_t x3, Float_t y3,Float_t& a, Float_t& b, Float_t& c){ | |
1024 | ||
1025 | //given (x,y) of three recpoints (in global coordinates) | |
1026 | //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c | |
1027 | ||
1028 | Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1); | |
1029 | if(den==0) return 0; | |
1030 | a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den; | |
1031 | b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1); | |
1032 | c = -x1*x1-y1*y1-a*x1-b*y1; | |
1033 | return 1; | |
1034 | } | |
1035 | //__________________________________________________________________________ | |
1036 | Int_t AliITStrackerSA::FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2,Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2){ | |
1037 | ||
1038 | //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer | |
1039 | //c2 is -rlayer*rlayer | |
1040 | ||
1041 | if(a1==0) return 0; | |
1042 | Double_t m = c2-c1; | |
1043 | Double_t aA = (b1*b1)/(a1*a1)+1; | |
1044 | Double_t bB = (-2*m*b1/(a1*a1)); | |
1045 | Double_t cC = c2+(m*m)/(a1*a1); | |
1046 | Double_t dD = bB*bB-4*aA*cC; | |
1047 | if(dD<0) return 0; | |
1048 | ||
1049 | y1 = (-bB+TMath::Sqrt(dD))/(2*aA); | |
1050 | y2 = (-bB-TMath::Sqrt(dD))/(2*aA); | |
1051 | x1 = (c2-c1-b1*y1)/a1; | |
1052 | x2 = (c2-c1-b1*y2)/a1; | |
1053 | ||
1054 | return 1; | |
1055 | } | |
1056 | //____________________________________________________________________ | |
1057 | Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t | |
1058 | x2,Double_t y2,Double_t x3,Double_t y3){ | |
1059 | ||
1060 | //calculates the curvature of track | |
1061 | Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1); | |
1062 | if(den==0) return 0; | |
1063 | Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den; | |
1064 | Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1); | |
1065 | Double_t c = -x1*x1-y1*y1-a*x1-b*y1; | |
1066 | Double_t xc=-a/2.; | |
1067 | ||
1068 | if((a*a+b*b-4*c)<0) return 0; | |
1069 | Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.; | |
1070 | if(rad==0) return 0; | |
1071 | ||
1072 | if((x1>0 && y1>0 && x1<xc)) rad*=-1; | |
1073 | if((x1<0 && y1>0 && x1<xc)) rad*=-1; | |
1074 | // if((x1<0 && y1<0 && x1<xc)) rad*=-1; | |
1075 | // if((x1>0 && y1<0 && x1<xc)) rad*=-1; | |
1076 | ||
1077 | return 1/rad; | |
1078 | ||
1079 | } | |
1080 | ||
1081 | ||
1082 | //____________________________________________________________________ | |
1083 | Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){ | |
1084 | ||
1085 | //Returns the point closest to pp | |
1086 | ||
1087 | Double_t diff1 = p1-pp; | |
1088 | Double_t diff2 = p2-pp; | |
1089 | ||
1090 | if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1; | |
1091 | else fPhiEstimate=p2; | |
1092 | return fPhiEstimate; | |
1093 | ||
1094 | } | |
1095 | ||
1096 | ||
1097 | //_________________________________________________________________ | |
1098 | Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const { | |
1099 | // returns track with lowers chi square | |
1100 | if(dim==1){ | |
1101 | //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0); | |
1102 | //return trk; | |
1103 | return 0; | |
1104 | } | |
1105 | if(dim==0) return 0; | |
1106 | Double_t * chi2 = new Double_t[dim]; | |
1107 | Int_t * index = new Int_t[dim]; | |
1108 | for(Int_t i=0;i<dim;i++){ | |
1109 | AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i); | |
1110 | chi2[i]=trk->GetChi2(); | |
1111 | index[i]=i; | |
1112 | } | |
1113 | ||
1114 | Int_t w=0;Double_t value; | |
1115 | Int_t lp; | |
1116 | while(w<dim){ | |
1117 | for(Int_t j=w+1;j<dim;j++){ | |
1118 | if(chi2[w]<chi2[j]){ | |
1119 | value=chi2[w]; | |
1120 | chi2[w]=chi2[j]; | |
1121 | chi2[j]=value; | |
1122 | lp=index[w]; | |
1123 | index[w]=index[j]; | |
1124 | index[j]=lp; | |
1125 | } | |
1126 | } | |
1127 | w++; | |
1128 | } | |
1129 | Int_t tmp = index[dim-1]; | |
1130 | delete [] chi2; | |
1131 | delete [] index; | |
1132 | return tmp; | |
1133 | } | |
1134 | ||
1135 | //__________________________________________________________ | |
1136 | Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){ | |
1137 | ||
1138 | //function used to determine the track label | |
1139 | ||
1140 | Int_t lb[6] = {l0,l1,l2,l3,l4,l5}; | |
1141 | Int_t aa[6]={1,1,1,1,1,1}; | |
1142 | Int_t ff=0; | |
1143 | Int_t ll=0; | |
1144 | Int_t k=0;Int_t w=0;Int_t num=6; | |
1145 | for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i; | |
1146 | ||
1147 | while(k<num){ | |
1148 | ||
1149 | for(Int_t i=k+1;i<num;i++){ | |
1150 | ||
1151 | if(lb[k]==lb[i] && aa[k]!=0){ | |
1152 | ||
1153 | aa[k]+=1; | |
1154 | aa[i]=0; | |
1155 | } | |
1156 | } | |
1157 | k++; | |
1158 | } | |
1159 | ||
1160 | while(w<num){ | |
1161 | ||
1162 | for(Int_t j=0;j<6;j++){ | |
1163 | if(aa[w]<aa[j]){ | |
1164 | ff=aa[w]; | |
1165 | aa[w]=aa[j]; | |
1166 | aa[j]=ff; | |
1167 | ll=lb[w]; | |
1168 | lb[w]=lb[j]; | |
1169 | lb[j]=ll; | |
1170 | } | |
1171 | } | |
1172 | w++; | |
1173 | } | |
1174 | ||
1175 | if(num<1) return -1; | |
1176 | return lb[num-1]; | |
1177 | } | |
1178 | ||
1179 | //_____________________________________________________________________________ | |
1180 | Int_t AliITStrackerSA::Label(Int_t gl1, Int_t gl2, Int_t gl3, Int_t gl4, Int_t gl5, Int_t gl6,Int_t gl7, Int_t gl8, Int_t gl9, Int_t gl10,Int_t gl11, | |
1181 | Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){ | |
1182 | ||
1183 | ||
1184 | //function used to assign label to the found track. If track is fake, the label is negative | |
1185 | ||
1186 | Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6}; | |
1187 | Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12}; | |
1188 | Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18}; | |
1189 | Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]); | |
1190 | Int_t lflag=0;Int_t num=6; | |
1191 | if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5; | |
1192 | ||
1193 | for(Int_t i=0;i<num;i++){ | |
1194 | if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1; | |
1195 | } | |
1196 | ||
1197 | if(lflag>=minNPoints) return ll; | |
1198 | else return -ll; | |
1199 | ||
1200 | ||
1201 | } | |
1202 | ||
1203 | //_____________________________________________________________________________ | |
1204 | void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){ | |
1205 | // Set sizes of the phi and lambda windows used for track finding | |
1206 | fNloop = n; | |
1207 | if(phi){ // user defined values | |
1208 | fPhiWin = new Double_t[fNloop]; | |
1209 | fLambdaWin = new Double_t[fNloop]; | |
1210 | for(Int_t k=0;k<fNloop;k++){ | |
1211 | fPhiWin[k]=phi[k]; | |
1212 | fLambdaWin[k]=lam[k]; | |
1213 | } | |
1214 | } | |
1215 | else { // default values | |
1216 | ||
1217 | Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047, | |
1218 | 0.005,0.0053,0.0055, | |
1219 | 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077, | |
1220 | 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097, | |
1221 | 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145}; | |
1222 | Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005, | |
1223 | 0.005,0.005,0.006, | |
1224 | 0.006,0.006,0.006,0.007,0.007,0.007,0.007, | |
1225 | 0.007,0.007,0.007,0.007,0.007,0.007,0.007, | |
1226 | 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008}; | |
1227 | ||
1228 | if(fNloop!=33){ | |
1229 | fNloop = 33; | |
1230 | } | |
1231 | ||
1232 | ||
1233 | fPhiWin = new Double_t[fNloop]; | |
1234 | fLambdaWin = new Double_t[fNloop]; | |
1235 | ||
1236 | Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese) | |
1237 | ||
1238 | for(Int_t k=0;k<fNloop;k++){ | |
1239 | fPhiWin[k]=phid[k]*factor; | |
1240 | fLambdaWin[k]=lambdad[k]*factor; | |
1241 | } | |
1242 | ||
1243 | } | |
1244 | ||
1245 | } | |
1246 | //_______________________________________________________________________ | |
1247 | void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){ | |
1248 | //Returns values of phi (azimuthal) and lambda angles for a given cluster | |
1249 | /* | |
1250 | Double_t rot[9]; fGeom->GetRotMatrix(module,rot); | |
1251 | Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det); | |
1252 | Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz); | |
1253 | ||
1254 | Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi(); | |
1255 | Double_t phi1=TMath::Pi()/2+alpha; | |
1256 | if (lay==1) phi1+=TMath::Pi(); | |
1257 | ||
1258 | Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1); | |
1259 | Float_t r=tx*cp+ty*sp; | |
1260 | ||
1261 | xyz= r*cp - cl->GetY()*sp; | |
1262 | y= r*sp + cl->GetY()*cp; | |
1263 | z=cl->GetZ(); | |
1264 | */ | |
1265 | Float_t xyz[3]; | |
1266 | cl->GetGlobalXYZ(xyz); | |
1267 | x=xyz[0]; | |
1268 | y=xyz[1]; | |
1269 | z=xyz[2]; | |
1270 | ||
1271 | phi=TMath::ATan2(y-vertex[1],x-vertex[0]); | |
1272 | lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1]))); | |
1273 | } | |
1274 | ||
1275 | //________________________________________________________________________ | |
1276 | void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){ | |
1277 | ||
1278 | //returns sigmax, y, z of cluster in global coordinates | |
1279 | /* | |
1280 | Double_t rot[9]; fGeom->GetRotMatrix(module,rot); | |
1281 | Int_t lay,lad,det; | |
1282 | AliITSgeomTGeo::GetModuleId(module,lay,lad,det); | |
1283 | ||
1284 | Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi(); | |
1285 | Double_t phi=TMath::Pi()/2+alpha; | |
1286 | if (lay==1) phi+=TMath::Pi(); | |
1287 | ||
1288 | Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi); | |
1289 | */ | |
1290 | Float_t covm[6]; | |
1291 | cl->GetGlobalCov(covm); | |
1292 | sx=TMath::Sqrt(covm[0]); | |
1293 | sy=TMath::Sqrt(covm[3]); | |
1294 | sz=TMath::Sqrt(covm[5]); | |
1295 | /* | |
1296 | sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2()); | |
1297 | sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2()); | |
1298 | sz = TMath::Sqrt(cl->GetSigmaZ2()); | |
1299 | */ | |
1300 | } |