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13918578 | 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 | ||
bf6adc12 | 16 | /* $Id$ */ |
17 | ||
13918578 | 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 | ||
aa4b78e1 | 25 | #include <stdlib.h> |
bf6adc12 | 26 | |
27 | #include <TArrayI.h> | |
13918578 | 28 | #include <TBranch.h> |
13918578 | 29 | #include <TObjArray.h> |
30 | #include <TTree.h> | |
bf6adc12 | 31 | |
32 | #include "AliESD.h" | |
33 | #include "AliESDVertex.h" | |
34 | #include "AliESDtrack.h" | |
bf6adc12 | 35 | #include "AliITSVertexer.h" |
13918578 | 36 | #include "AliITSclusterTable.h" |
00a7cc50 | 37 | #include "AliITSRecPoint.h" |
13918578 | 38 | #include "AliITSgeom.h" |
13918578 | 39 | #include "AliITStrackSA.h" |
bf6adc12 | 40 | #include "AliITStrackerSA.h" |
41 | #include "AliRun.h" | |
13918578 | 42 | |
43 | ClassImp(AliITStrackerSA) | |
44 | ||
45 | //____________________________________________________________________________ | |
e399f961 | 46 | AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(), |
47 | fPhiEstimate(0), | |
48 | fLambdac(0), | |
49 | fPhic(0), | |
50 | fCoef1(0), | |
51 | fCoef2(0), | |
52 | fCoef3(0), | |
53 | fNloop(0), | |
54 | fPhiWin(0), | |
55 | fLambdaWin(0), | |
56 | fVert(0), | |
57 | fVertexer(0), | |
58 | fGeom(0), | |
59 | fListOfTracks(0), | |
60 | fITSclusters(0), | |
61 | fSixPoints(0), | |
62 | fCluLayer(0), | |
63 | fCluCoord(0){ | |
13918578 | 64 | // Default constructor |
65 | Init(); | |
627b6db6 | 66 | |
13918578 | 67 | } |
2257f27e | 68 | //____________________________________________________________________________ |
e399f961 | 69 | AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom):AliITStrackerMI(geom), |
70 | fPhiEstimate(0), | |
71 | fLambdac(0), | |
72 | fPhic(0), | |
73 | fCoef1(0), | |
74 | fCoef2(0), | |
75 | fCoef3(0), | |
76 | fNloop(0), | |
77 | fPhiWin(0), | |
78 | fLambdaWin(0), | |
79 | fVert(0), | |
80 | fVertexer(0), | |
81 | fGeom(0), | |
82 | fListOfTracks(0), | |
83 | fITSclusters(0), | |
84 | fSixPoints(0), | |
85 | fCluLayer(0), | |
86 | fCluCoord(0) | |
2257f27e | 87 | { |
88 | // Standard constructor (Vertex is known and passed to this obj.) | |
89 | Init(); | |
90 | fVert = 0; | |
91 | fGeom = geom; | |
627b6db6 | 92 | |
2257f27e | 93 | } |
94 | ||
13918578 | 95 | //____________________________________________________________________________ |
e399f961 | 96 | AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliESDVertex *vert):AliITStrackerMI(geom), |
97 | fPhiEstimate(0), | |
98 | fLambdac(0), | |
99 | fPhic(0), | |
100 | fCoef1(0), | |
101 | fCoef2(0), | |
102 | fCoef3(0), | |
103 | fNloop(0), | |
104 | fPhiWin(0), | |
105 | fLambdaWin(0), | |
106 | fVert(vert), | |
107 | fVertexer(0), | |
108 | fGeom(0), | |
109 | fListOfTracks(0), | |
110 | fITSclusters(0), | |
111 | fSixPoints(0), | |
112 | fCluLayer(0), | |
113 | fCluCoord(0) | |
13918578 | 114 | { |
115 | // Standard constructor (Vertex is known and passed to this obj.) | |
116 | Init(); | |
13918578 | 117 | fGeom = geom; |
627b6db6 | 118 | |
13918578 | 119 | } |
120 | ||
13918578 | 121 | //____________________________________________________________________________ |
e399f961 | 122 | AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliITSVertexer *vertexer):AliITStrackerMI(geom), |
123 | fPhiEstimate(0), | |
124 | fLambdac(0), | |
125 | fPhic(0), | |
126 | fCoef1(0), | |
127 | fCoef2(0), | |
128 | fCoef3(0), | |
129 | fNloop(0), | |
130 | fPhiWin(0), | |
131 | fLambdaWin(0), | |
132 | fVert(), | |
133 | fVertexer(vertexer), | |
134 | fGeom(0), | |
135 | fListOfTracks(0), | |
136 | fITSclusters(0), | |
137 | fSixPoints(0), | |
138 | fCluLayer(0), | |
139 | fCluCoord(0) | |
13918578 | 140 | { |
141 | // Standard constructor (Vertex is unknown - vertexer is passed to this obj) | |
142 | Init(); | |
143 | fVertexer = vertexer; | |
144 | fGeom = geom; | |
627b6db6 | 145 | |
13918578 | 146 | } |
147 | ||
148 | //____________________________________________________________________________ | |
e399f961 | 149 | AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(), |
150 | fPhiEstimate(tracker.fPhiEstimate), | |
151 | fLambdac(tracker.fLambdac), | |
152 | fPhic(tracker.fPhic), | |
153 | fCoef1(tracker.fCoef1), | |
154 | fCoef2(tracker.fCoef2), | |
155 | fCoef3(tracker.fCoef3), | |
156 | fNloop(tracker.fNloop), | |
157 | fPhiWin(tracker.fPhiWin), | |
158 | fLambdaWin(tracker.fLambdaWin), | |
159 | fVert(tracker.fVert), | |
160 | fVertexer(tracker.fVertexer), | |
161 | fGeom(tracker.fGeom), | |
162 | fListOfTracks(tracker.fListOfTracks), | |
163 | fITSclusters(tracker.fITSclusters), | |
164 | fSixPoints(tracker.fSixPoints), | |
165 | fCluLayer(tracker.fCluLayer), | |
166 | fCluCoord(tracker.fCluCoord) { | |
13918578 | 167 | // Copy constructor |
13918578 | 168 | for(Int_t i=0;i<2;i++){ |
169 | fPoint1[i]=tracker.fPoint1[i]; | |
170 | fPoint2[i]=tracker.fPoint2[i]; | |
171 | fPoint3[i]=tracker.fPoint3[i]; | |
172 | fPointc[i]=tracker.fPointc[i]; | |
173 | } | |
13918578 | 174 | if(tracker.fVertexer && tracker.fVert){ |
d681bb2d | 175 | fVert = new AliESDVertex(*tracker.fVert); |
13918578 | 176 | } |
177 | else { | |
178 | fVert = tracker.fVert; | |
179 | } | |
7e5bf5af | 180 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ |
181 | fCluLayer[i] = tracker.fCluLayer[i]; | |
182 | fCluCoord[i] = tracker.fCluCoord[i]; | |
183 | } | |
13918578 | 184 | } |
7d62fb64 | 185 | //______________________________________________________________________ |
e399f961 | 186 | AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){ |
187 | // Assignment operator. | |
188 | this->~AliITStrackerSA(); | |
189 | new(this) AliITStrackerSA(source); | |
190 | return *this; | |
191 | ||
7d62fb64 | 192 | } |
13918578 | 193 | |
194 | //____________________________________________________________________________ | |
195 | AliITStrackerSA::~AliITStrackerSA(){ | |
196 | // destructor | |
d681bb2d | 197 | // if fVertexer is not null, the AliESDVertex obj. is owned by this class |
13918578 | 198 | // and is deleted here |
199 | if(fVertexer){ | |
200 | if(fVert)delete fVert; | |
201 | } | |
202 | fVert = 0; | |
203 | fVertexer = 0; | |
7e5bf5af | 204 | |
13918578 | 205 | if(fPhiWin)delete []fPhiWin; |
206 | if(fLambdaWin)delete []fLambdaWin; | |
4e05ab9a | 207 | fListOfTracks->Delete(); |
7e5bf5af | 208 | if(fCluLayer){ |
209 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
210 | if(fCluLayer[i]){ | |
211 | fCluLayer[i]->Delete(); | |
212 | delete fCluLayer[i]; | |
213 | } | |
214 | } | |
215 | delete [] fCluLayer; | |
216 | } | |
217 | if(fCluCoord){ | |
218 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
219 | if(fCluCoord[i]){ | |
220 | fCluCoord[i]->Delete(); | |
221 | delete fCluCoord[i]; | |
222 | } | |
223 | } | |
224 | delete [] fCluCoord; | |
627b6db6 | 225 | } |
7e5bf5af | 226 | |
227 | fGeom = 0; | |
228 | } | |
13918578 | 229 | |
230 | //____________________________________________________________________________ | |
231 | void AliITStrackerSA::Init(){ | |
232 | // Reset all data members | |
233 | fPhiEstimate=0; | |
234 | for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;} | |
235 | fLambdac=0; | |
236 | fPhic=0; | |
237 | fCoef1=0; | |
238 | fCoef2=0; | |
239 | fCoef3=0; | |
240 | fPointc[0]=0; | |
241 | fPointc[1]=0; | |
242 | fVert = 0; | |
243 | fVertexer = 0; | |
244 | fGeom = 0; | |
13918578 | 245 | SetWindowSizes(); |
2257f27e | 246 | fITSclusters = 0; |
247 | SetSixPoints(); | |
4e05ab9a | 248 | fListOfTracks=new TObjArray(0,0); |
7e5bf5af | 249 | fCluLayer = 0; |
250 | fCluCoord = 0; | |
627b6db6 | 251 | } |
13918578 | 252 | //_______________________________________________________________________ |
253 | void AliITStrackerSA::ResetForFinding(){ | |
254 | // Reset data members used in all loops during track finding | |
255 | fPhiEstimate=0; | |
256 | for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;} | |
257 | fLambdac=0; | |
258 | fPhic=0; | |
259 | fCoef1=0; | |
260 | fCoef2=0; | |
261 | fCoef3=0; | |
262 | fPointc[0]=0; | |
263 | fPointc[1]=0; | |
4e05ab9a | 264 | fListOfTracks->Delete(); |
13918578 | 265 | } |
bef31448 | 266 | |
7e5bf5af | 267 | |
2257f27e | 268 | |
bef31448 | 269 | //______________________________________________________________________ |
2257f27e | 270 | Int_t AliITStrackerSA::FindTracks(AliESD* event){ |
bef31448 | 271 | |
7e5bf5af | 272 | // Track finder using the ESD object |
273 | ||
2257f27e | 274 | |
7e5bf5af | 275 | //controllare numero cluster sui layer1 e 2 (morti?) |
276 | //non trova tracce...controllare.. | |
4e05ab9a | 277 | |
2257f27e | 278 | if(!fITSclusters){ |
279 | Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n"); | |
280 | return -1; | |
bef31448 | 281 | } |
7e5bf5af | 282 | |
283 | ||
284 | //Reads event and mark clusters of traks already found, with flag kITSin | |
285 | Int_t nentr=event->GetNumberOfTracks(); | |
286 | while (nentr--) { | |
287 | AliESDtrack *track=event->GetTrack(nentr); | |
288 | if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){ | |
ef7253ac | 289 | Int_t idx[12]; |
7e5bf5af | 290 | Int_t ncl = track->GetITSclusters(idx); |
291 | for(Int_t k=0;k<ncl;k++){ | |
00a7cc50 | 292 | AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]); |
7e5bf5af | 293 | cll->SetBit(kSAflag); |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | Double_t primaryVertex[3]; | |
299 | event->GetVertex()->GetXYZ(primaryVertex); | |
300 | //Creates TClonesArray with clusters for each layer. The clusters already used | |
301 | //by AliITStrackerMI are not considered | |
302 | ||
303 | Int_t nclusters[6]={0,0,0,0,0,0}; | |
304 | Int_t dmar[6]={0,0,0,0,0,0}; | |
305 | fCluLayer = new TClonesArray*[fGeom->GetNlayers()]; | |
306 | fCluCoord = new TClonesArray*[fGeom->GetNlayers()]; | |
307 | ||
308 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
309 | AliITSlayer &layer=fgLayers[i]; | |
310 | for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){ | |
00a7cc50 | 311 | AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli); |
7e5bf5af | 312 | if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol. |
313 | if(cls->GetQ()==0) continue; //fake clusters dead zones | |
314 | nclusters[i]++; | |
315 | } | |
316 | dmar[i]=0; | |
00a7cc50 | 317 | fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]); |
7e5bf5af | 318 | fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]); |
319 | } | |
320 | ||
321 | ||
322 | Int_t * firstmod = new Int_t[fGeom->GetNlayers()]; | |
323 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
324 | firstmod[i]=fGeom->GetModuleIndex(i+1,1,1); | |
325 | } | |
326 | ||
327 | for(Int_t ilay=0;ilay<fGeom->GetNlayers();ilay++){ | |
328 | TClonesArray &clulay = *fCluLayer[ilay]; | |
329 | TClonesArray &clucoo = *fCluCoord[ilay]; | |
330 | AliITSlayer &layer=fgLayers[ilay]; | |
331 | for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){ | |
00a7cc50 | 332 | AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli); |
7e5bf5af | 333 | if(cls->TestBit(kSAflag)==kTRUE) continue; |
334 | if(cls->GetQ()==0) continue; | |
335 | Double_t phi=0;Double_t lambda=0; | |
336 | Float_t x=0;Float_t y=0;Float_t z=0; | |
337 | Float_t sx=0;Float_t sy=0;Float_t sz=0; | |
338 | Int_t module = cls->GetDetectorIndex()+firstmod[ilay]; | |
339 | GetCoorAngles(cls,module,phi,lambda,x,y,z,primaryVertex); | |
340 | GetCoorErrors(cls,module,sx,sy,sz); | |
00a7cc50 | 341 | new (clulay[dmar[ilay]]) AliITSRecPoint(*cls); |
7e5bf5af | 342 | new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli); |
343 | dmar[ilay]++; | |
344 | } | |
345 | } | |
346 | ||
2257f27e | 347 | |
348 | //Get primary vertex | |
7e5bf5af | 349 | |
350 | Int_t ntrack=0; | |
351 | //loop on the different windows | |
352 | for(Int_t nloop=0;nloop<fNloop;nloop++){ | |
353 | for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0 | |
354 | ||
355 | ResetForFinding(); | |
356 | Int_t pflag=0; | |
357 | ||
00a7cc50 | 358 | AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl); |
7e5bf5af | 359 | |
360 | if(!cl) continue; | |
361 | ||
362 | ||
363 | if (cl->GetQ()<=0) continue; | |
364 | ||
365 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl); | |
366 | fPhic = arr->GetPhi(); | |
367 | fLambdac = arr->GetLambda(); | |
368 | if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue; | |
369 | fPhiEstimate = fPhic; | |
370 | AliITStrackSA* trs = new AliITStrackSA(); | |
371 | fPoint1[0]=primaryVertex[0]; | |
372 | fPoint1[1]=primaryVertex[1]; | |
373 | ||
374 | ||
375 | fPoint2[0]=arr->GetX(); | |
376 | fPoint2[1]=arr->GetY(); | |
377 | Int_t * nn = new Int_t[fGeom->GetNlayers()];//counter for clusters on each layer | |
378 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ nn[i]=0;} | |
379 | nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
380 | ||
381 | nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); | |
bef31448 | 382 | if(nn[1]>0){ |
383 | pflag=1; | |
384 | fPoint3[0] = fPointc[0]; | |
385 | fPoint3[1] = fPointc[1]; | |
386 | } | |
cfe729e0 | 387 | nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); |
bef31448 | 388 | if(nn[1]==0 && nn[2]==0) pflag=0; |
389 | if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();} | |
390 | if(nn[2]!=0 && nn[1]==0){ | |
391 | pflag=1; | |
392 | fPoint3[0]=fPointc[0]; | |
393 | fPoint3[1]=fPointc[1]; | |
394 | } | |
13918578 | 395 | |
cfe729e0 | 396 | nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); |
bef31448 | 397 | pflag=1; |
398 | if(nn[3]!=0) UpdatePoints(); | |
cfe729e0 | 399 | nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); |
bef31448 | 400 | pflag=1; |
401 | if(nn[4]!=0) UpdatePoints(); | |
cfe729e0 | 402 | nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag); |
bef31448 | 403 | |
404 | ||
405 | Int_t layOK=0; | |
406 | Int_t numberofpoints; | |
2257f27e | 407 | if(fSixPoints) numberofpoints=6; //check of the candidate track |
bef31448 | 408 | else numberofpoints=5; //if track is good (with the required number |
409 | for(Int_t nnp=0;nnp<fGeom->GetNlayers();nnp++){ //of points) it is written on file | |
410 | if(nn[nnp]!=0) layOK+=1; | |
411 | } | |
412 | if(layOK>=numberofpoints){ | |
7e5bf5af | 413 | |
414 | AliITStrackV2* tr2 = FitTrack(trs,primaryVertex); | |
bef31448 | 415 | |
7e5bf5af | 416 | if(tr2==0) continue; |
417 | ||
bef31448 | 418 | AliESDtrack outtrack; |
419 | outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin); | |
420 | event->AddTrack(&outtrack); | |
bef31448 | 421 | ntrack++; |
7e5bf5af | 422 | |
bef31448 | 423 | } |
7e5bf5af | 424 | |
425 | ||
bef31448 | 426 | delete trs; |
2257f27e | 427 | delete[] nn; |
627b6db6 | 428 | |
7e5bf5af | 429 | }//end loop on clusters of layer1 |
627b6db6 | 430 | |
7e5bf5af | 431 | //end loop2 |
432 | } | |
bef31448 | 433 | |
7e5bf5af | 434 | //if 5/6 points are required, second loop starting |
435 | //from second layer, to find tracks with point of | |
436 | //layer 1 missing | |
bef31448 | 437 | |
7e5bf5af | 438 | if(!fSixPoints){ |
439 | // counter for clusters on each layer | |
440 | Int_t * nn = new Int_t[fGeom->GetNlayers()-1]; | |
441 | for(Int_t nloop=0;nloop<fNloop;nloop++){ | |
442 | Int_t ncl2=fCluLayer[1]->GetEntries(); | |
443 | while(ncl2--){ //loop starting from layer 2 | |
444 | ResetForFinding(); | |
445 | Int_t pflag=0; | |
00a7cc50 | 446 | AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2); |
7e5bf5af | 447 | |
448 | if(!cl) continue; | |
449 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2); | |
450 | fPhic = arr->GetPhi(); | |
451 | fLambdac = arr->GetLambda(); | |
452 | fPhiEstimate = fPhic; | |
453 | ||
454 | AliITStrackSA* trs = new AliITStrackSA(); | |
455 | fPoint1[0]=primaryVertex[0]; | |
456 | fPoint1[1]=primaryVertex[1]; | |
457 | ||
458 | fPoint2[0]=arr->GetX(); | |
459 | fPoint2[1]=arr->GetY(); | |
460 | for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++)nn[kk] = 0; | |
461 | nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop], | |
462 | trs,primaryVertex[2],pflag); | |
463 | nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop], | |
464 | trs,primaryVertex[2],pflag); | |
465 | if(nn[1]!=0){ | |
466 | pflag=1; | |
467 | fPoint3[0]=fPointc[0]; | |
468 | fPoint3[1]=fPointc[1]; | |
469 | } | |
470 | nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop], | |
471 | trs,primaryVertex[2],pflag); | |
472 | if(nn[2]!=0){ | |
473 | pflag=1; | |
474 | UpdatePoints(); | |
475 | } | |
476 | nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop], | |
477 | trs,primaryVertex[2],pflag); | |
478 | if(nn[3]!=0){ | |
479 | pflag=1; | |
480 | UpdatePoints(); | |
481 | } | |
482 | nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop], | |
483 | trs,primaryVertex[2],pflag); | |
484 | ||
485 | Int_t fl=0; | |
486 | for(Int_t nnp=0;nnp<fGeom->GetNlayers()-1;nnp++){ | |
487 | if(nn[nnp]!=0) fl+=1; | |
488 | } | |
489 | if(fl>=5){ // 5/6 | |
490 | AliITStrackV2* tr2 = FitTrack(trs,primaryVertex); | |
491 | if(tr2==0){ | |
492 | continue; | |
493 | } | |
494 | ||
495 | AliESDtrack outtrack; | |
496 | outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin); | |
497 | event->AddTrack(&outtrack); | |
498 | ntrack++; | |
499 | ||
500 | } | |
501 | ||
502 | ||
bef31448 | 503 | delete trs; |
504 | }//end loop on clusters of layer2 | |
7e5bf5af | 505 | } |
506 | ||
bef31448 | 507 | delete [] nn; |
508 | } //end opt="5/6" | |
7e5bf5af | 509 | |
bef31448 | 510 | delete [] firstmod; |
bef31448 | 511 | Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks()); |
2257f27e | 512 | return 0; |
bef31448 | 513 | |
514 | } | |
7e5bf5af | 515 | |
516 | ||
517 | ||
2257f27e | 518 | |
519 | ||
13918578 | 520 | //________________________________________________________________________ |
521 | ||
7e5bf5af | 522 | AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex){ |
13918578 | 523 | //fit of the found track |
524 | ||
13918578 | 525 | |
037efb75 | 526 | Int_t * firstmod = new Int_t[fGeom->GetNlayers()]; |
13918578 | 527 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ |
528 | firstmod[i]=fGeom->GetModuleIndex(i+1,1,1); | |
529 | } | |
15dd636f | 530 | |
13918578 | 531 | Int_t nclusters = tr->GetNumberOfClustersSA(); |
532 | TObjArray** listlayer = new TObjArray*[fGeom->GetNlayers()]; | |
533 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
534 | listlayer[i] = new TObjArray(0,0); | |
535 | } | |
536 | ||
537 | TArrayI clind0(20); | |
538 | TArrayI clind1(20); | |
539 | TArrayI clind2(20); | |
540 | TArrayI clind3(20); | |
541 | TArrayI clind4(20); | |
542 | TArrayI clind5(20); | |
543 | ||
7e5bf5af | 544 | TArrayI mark0(20); |
545 | TArrayI mark1(20); | |
546 | TArrayI mark2(20); | |
547 | TArrayI mark3(20); | |
548 | TArrayI mark4(20); | |
549 | TArrayI mark5(20); | |
550 | ||
551 | ||
037efb75 | 552 | Int_t * nnn = new Int_t[fGeom->GetNlayers()]; |
7e5bf5af | 553 | Int_t * kkk = new Int_t[fGeom->GetNlayers()]; |
554 | for(Int_t i=0;i<fGeom->GetNlayers();i++) {nnn[i]=0;kkk[i]=0;} | |
13918578 | 555 | |
556 | for(Int_t ncl=0;ncl<nclusters;ncl++){ | |
7e5bf5af | 557 | Int_t index = tr->GetClusterIndexSA(ncl); |
00a7cc50 | 558 | AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index); |
627b6db6 | 559 | if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag); |
13918578 | 560 | Int_t lay = (index & 0xf0000000) >> 28; |
561 | if(lay==0) { listlayer[0]->AddLast(cl); clind0[nnn[0]]=index;nnn[0]++;} | |
562 | if(lay==1) { listlayer[1]->AddLast(cl); clind1[nnn[1]]=index;nnn[1]++;} | |
563 | if(lay==2) { listlayer[2]->AddLast(cl); clind2[nnn[2]]=index;nnn[2]++;} | |
564 | if(lay==3) { listlayer[3]->AddLast(cl); clind3[nnn[3]]=index;nnn[3]++;} | |
565 | if(lay==4) { listlayer[4]->AddLast(cl); clind4[nnn[4]]=index;nnn[4]++;} | |
566 | if(lay==5) { listlayer[5]->AddLast(cl); clind5[nnn[5]]=index;nnn[5]++;} | |
567 | } | |
037efb75 | 568 | delete [] nnn; |
13918578 | 569 | |
7e5bf5af | 570 | for(Int_t nlay=0;nlay<fGeom->GetNlayers();nlay++){ |
571 | for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){ | |
572 | Int_t mark = tr->GetClusterMark(nlay,ncl); | |
573 | if(nlay==0) { mark0[kkk[0]]=mark;kkk[0]++;} | |
574 | if(nlay==1) { mark1[kkk[1]]=mark;kkk[1]++;} | |
575 | if(nlay==2) { mark2[kkk[2]]=mark;kkk[2]++;} | |
576 | if(nlay==3) { mark3[kkk[3]]=mark;kkk[3]++;} | |
577 | if(nlay==4) { mark4[kkk[4]]=mark;kkk[4]++;} | |
578 | if(nlay==5) { mark5[kkk[5]]=mark;kkk[5]++;} | |
579 | ||
580 | } | |
581 | } | |
582 | ||
583 | delete [] kkk; | |
584 | ||
13918578 | 585 | |
037efb75 | 586 | Int_t * end = new Int_t[fGeom->GetNlayers()]; |
13918578 | 587 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ |
588 | if(listlayer[i]->GetEntries()==0) end[i]=1; | |
589 | else end[i]=listlayer[i]->GetEntries(); | |
590 | } | |
591 | ||
7e5bf5af | 592 | TClonesArray* listSA = new TClonesArray("AliITStrackSA"); |
593 | TClonesArray &tri = *listSA; | |
594 | Int_t nlist=0; | |
595 | ||
596 | if(end[0]==0) end[0]=1; //for tracks with cluster on layer 0 missing | |
13918578 | 597 | for(Int_t l1=0;l1<end[0];l1++){//loop on layer 1 |
00a7cc50 | 598 | AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l1); |
13918578 | 599 | Double_t x1,y1,z1,sx1,sy1,sz1; |
600 | Double_t x2,y2,z2,sx2,sy2,sz2; | |
00a7cc50 | 601 | AliITSRecPoint* p1=0; |
602 | AliITSRecPoint* p2=0; | |
bef31448 | 603 | Int_t index1=clind0[l1]; |
604 | Int_t index2=0; | |
7e5bf5af | 605 | Int_t mrk1 = mark0[l1]; |
606 | Int_t mrk2 = 0; | |
607 | Int_t lay1=0; | |
608 | Int_t lay2=1; | |
609 | Int_t module1=-1; | |
13918578 | 610 | for(Int_t l2=0;l2<end[1];l2++){//loop on layer 2 |
00a7cc50 | 611 | AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l2); |
bef31448 | 612 | index2=clind1[l2]; |
7e5bf5af | 613 | mrk2 = mark1[l2]; |
13918578 | 614 | for(Int_t l3=0;l3<end[2];l3++){ //loop on layer 3 |
00a7cc50 | 615 | AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l3); |
bef31448 | 616 | |
617 | if(cl0==0 && cl1!=0) { | |
7e5bf5af | 618 | p2 = cl2;index1=clind2[l3];mrk1=mark2[l3];lay1=2; |
bef31448 | 619 | p1=cl1; |
7e5bf5af | 620 | module1 = p1->GetDetectorIndex()+firstmod[1]; |
bef31448 | 621 | } |
622 | if(cl0!=0 && cl1==0){ | |
623 | p1=cl0; | |
7e5bf5af | 624 | p2=cl2;index2=clind2[l3];mrk2=mark2[l3];lay2=2; |
625 | module1 = p1->GetDetectorIndex()+firstmod[0]; | |
bef31448 | 626 | } |
627 | if(cl0!=0 && cl1!=0){ | |
628 | p1=cl0; | |
629 | p2=cl1; | |
7e5bf5af | 630 | module1 = p1->GetDetectorIndex()+firstmod[0]; |
bef31448 | 631 | } |
7e5bf5af | 632 | |
633 | Int_t cln1=mrk1; | |
634 | Int_t cln2=mrk2; | |
635 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay1,cln1); | |
636 | AliITSclusterTable* arr1= (AliITSclusterTable*)GetClusterCoord(lay2,cln2); | |
637 | x1 = arr->GetX(); | |
638 | x2 = arr1->GetX(); | |
639 | y1 = arr->GetY(); | |
640 | y2 = arr1->GetY(); | |
641 | z1 = arr->GetZ(); | |
642 | z2 = arr1->GetZ(); | |
643 | sx1 = arr->GetSx(); | |
644 | sx2 = arr1->GetSx(); | |
645 | sy1 = arr->GetSy(); | |
646 | sy2 = arr1->GetSy(); | |
647 | sz1 = arr->GetSz(); | |
648 | sz2 = arr1->GetSz(); | |
649 | ||
13918578 | 650 | Int_t layer,ladder,detector; |
651 | fGeom->GetModuleId(module1,layer,ladder,detector); | |
bef31448 | 652 | Float_t yclu1 = p1->GetY(); |
653 | Float_t zclu1 = p1->GetZ(); | |
654 | Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2); | |
7e5bf5af | 655 | |
656 | Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); | |
657 | Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1)); | |
658 | ||
bef31448 | 659 | for(Int_t l4=0;l4<end[3];l4++){ //loop on layer 4 |
00a7cc50 | 660 | AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l4); |
bef31448 | 661 | for(Int_t l5=0;l5<end[4];l5++){ //loop on layer 5 |
00a7cc50 | 662 | AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l5); |
bef31448 | 663 | for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6 |
00a7cc50 | 664 | AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l6); |
7e5bf5af | 665 | AliITStrackSA* trac = new AliITStrackSA(fGeom,layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1); |
bef31448 | 666 | |
7e5bf5af | 667 | if(cl5!=0) { |
668 | trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0); | |
669 | trac->AddClusterMark(5,mark5[l6]); | |
670 | } | |
671 | if(cl4!=0){ | |
672 | trac->AddClusterV2(4,(clind4[l5] & 0x0fffffff)>>0); | |
673 | trac->AddClusterMark(4,mark4[l5]); | |
674 | } | |
675 | if(cl3!=0){ | |
676 | trac->AddClusterV2(3,(clind3[l4] & 0x0fffffff)>>0); | |
677 | trac->AddClusterMark(3,mark3[l4]); | |
678 | } | |
679 | if(cl2!=0){ | |
680 | trac->AddClusterV2(2,(clind2[l3] & 0x0fffffff)>>0); | |
681 | trac->AddClusterMark(2,mark2[l3]); | |
682 | } | |
683 | if(cl1!=0){ | |
684 | trac->AddClusterV2(1,(clind1[l2] & 0x0fffffff)>>0); | |
685 | trac->AddClusterMark(1,mark1[l2]); | |
686 | } | |
687 | if(cl0!=0){ | |
688 | trac->AddClusterV2(0,(clind0[l1] & 0x0fffffff)>>0); | |
689 | trac->AddClusterMark(0,mark0[l1]); | |
690 | } | |
e43c066c | 691 | //fit with Kalman filter using AliITStrackerMI::RefitAt() |
bef31448 | 692 | |
7e5bf5af | 693 | |
15dd636f | 694 | AliITStrackMI* ot = new AliITStrackSA(*trac); |
bef31448 | 695 | |
6c94f330 | 696 | ot->ResetCovariance(10.); |
bef31448 | 697 | ot->ResetClusters(); |
698 | ||
699 | if(RefitAt(49.,ot,trac)){ //fit from layer 1 to layer 6 | |
15dd636f | 700 | AliITStrackMI *otrack2 = new AliITStrackMI(*ot); |
6c94f330 | 701 | otrack2->ResetCovariance(10.); |
bef31448 | 702 | otrack2->ResetClusters(); |
703 | //fit from layer 6 to layer 1 | |
73f446a0 | 704 | if(RefitAt(3.7,otrack2,ot)) { |
705 | fListOfTracks->AddLast(otrack2); | |
7e5bf5af | 706 | new (tri[nlist]) AliITStrackSA(*trac); |
707 | nlist++; | |
73f446a0 | 708 | } else { |
709 | delete otrack2; | |
710 | } | |
bef31448 | 711 | |
712 | } | |
713 | ||
714 | delete ot; | |
715 | delete trac; | |
716 | }//end loop layer 6 | |
717 | }//end loop layer 5 | |
718 | }//end loop layer 4 | |
719 | ||
13918578 | 720 | }//end loop layer 3 |
bef31448 | 721 | }//end loop layer 2 |
13918578 | 722 | }//end loop layer 1 |
723 | ||
037efb75 | 724 | delete [] end; |
725 | ||
7e5bf5af | 726 | |
727 | ||
4e05ab9a | 728 | Int_t dim=fListOfTracks->GetEntries(); |
13918578 | 729 | if(dim==0){ |
13918578 | 730 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ |
731 | delete listlayer[i]; | |
732 | } | |
c09cece6 | 733 | delete [] listlayer; |
00a7cc50 | 734 | listSA->Delete(); |
735 | delete listSA; | |
73f446a0 | 736 | delete [] firstmod; |
13918578 | 737 | return 0; |
738 | } | |
739 | ||
7e5bf5af | 740 | Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim); |
741 | AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2); | |
742 | AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2); | |
743 | ||
73f446a0 | 744 | if(otrack==0) { |
745 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ | |
746 | delete listlayer[i]; | |
747 | } | |
c09cece6 | 748 | delete [] listlayer; |
00a7cc50 | 749 | listSA->Delete(); |
750 | delete listSA; | |
73f446a0 | 751 | delete [] firstmod; |
752 | return 0; | |
753 | } | |
037efb75 | 754 | Int_t * indexc = new Int_t[fGeom->GetNlayers()]; |
13918578 | 755 | for(Int_t i=0;i<fGeom->GetNlayers();i++) indexc[i]=0; |
756 | for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){ | |
757 | indexc[nind] = otrack->GetClusterIndex(nind); | |
758 | } | |
00a7cc50 | 759 | AliITSRecPoint* cl0 = (AliITSRecPoint*)GetCluster(indexc[0]); |
760 | AliITSRecPoint* cl1 = (AliITSRecPoint*)GetCluster(indexc[1]); | |
761 | AliITSRecPoint* cl2 = (AliITSRecPoint*)GetCluster(indexc[2]); | |
762 | AliITSRecPoint* cl3 = (AliITSRecPoint*)GetCluster(indexc[3]); | |
763 | AliITSRecPoint* cl4 = (AliITSRecPoint*)GetCluster(indexc[4]); | |
13918578 | 764 | Int_t labl[3]={-1,-1,-1}; |
765 | if(otrack->GetNumberOfClusters()==fGeom->GetNlayers()){ | |
00a7cc50 | 766 | AliITSRecPoint* cl5 = (AliITSRecPoint*)GetCluster(indexc[5]); |
13918578 | 767 | labl[0]=cl5->GetLabel(0); |
768 | labl[1]=cl5->GetLabel(1); | |
769 | labl[2]=cl5->GetLabel(2); | |
770 | } | |
037efb75 | 771 | delete [] indexc; |
13918578 | 772 | if(otrack->GetNumberOfClusters()==(fGeom->GetNlayers()-1)){ |
773 | labl[0]=-1; | |
774 | labl[1]=-1; | |
775 | labl[2]=-1; | |
776 | } | |
777 | Int_t numberofpoints; | |
2257f27e | 778 | if(fSixPoints) numberofpoints=6; |
13918578 | 779 | else numberofpoints=5; |
e43c066c | 780 | CookLabel(otrack,0.); //MI change - to see fake ratio |
13918578 | 781 | Int_t label = Label(cl0->GetLabel(0),cl1->GetLabel(0), |
bef31448 | 782 | cl2->GetLabel(0),cl3->GetLabel(0), |
783 | cl4->GetLabel(0),labl[0], | |
784 | cl0->GetLabel(1),cl1->GetLabel(1), | |
785 | cl2->GetLabel(1),cl3->GetLabel(1), | |
786 | cl4->GetLabel(1),labl[1], | |
787 | cl0->GetLabel(2),cl1->GetLabel(2), | |
788 | cl2->GetLabel(2),cl3->GetLabel(2), | |
789 | cl4->GetLabel(2),labl[2],numberofpoints); | |
13918578 | 790 | |
791 | otrack->SetLabel(label); | |
7e5bf5af | 792 | //remove clusters of found track |
793 | ||
794 | for(Int_t nlay=0;nlay<fGeom->GetNlayers();nlay++){ | |
795 | for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){ | |
796 | Int_t index = trsa->GetClusterMark(nlay,cln); | |
797 | fCluLayer[nlay]->RemoveAt(index); | |
798 | RemoveClusterCoord(nlay,index); | |
799 | fCluLayer[nlay]->Compress(); | |
800 | } | |
801 | } | |
802 | listSA->Delete(); | |
803 | delete listSA; | |
804 | ||
13918578 | 805 | for(Int_t i=0;i<fGeom->GetNlayers();i++){ |
806 | delete listlayer[i]; | |
807 | } | |
c09cece6 | 808 | delete [] listlayer; |
037efb75 | 809 | delete [] firstmod; |
13918578 | 810 | return otrack; |
811 | ||
812 | } | |
813 | ||
bef31448 | 814 | |
4e05ab9a | 815 | |
bef31448 | 816 | //_______________________________________________________ |
7e5bf5af | 817 | Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){ |
13918578 | 818 | //function used to to find the clusters associated to the track |
819 | Int_t nc=0; | |
820 | AliITSlayer &lay = fgLayers[layer]; | |
7e5bf5af | 821 | Double_t r=lay.GetR(); |
822 | if(pflag==1){ | |
cfe729e0 | 823 | Float_t cx1,cx2,cy1,cy2; |
824 | FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3); | |
825 | if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0) | |
826 | return 0; | |
827 | Double_t fi1=TMath::ATan2(cy1,cx1); | |
828 | Double_t fi2=TMath::ATan2(cy2,cx2); | |
829 | fPhiEstimate=ChoosePoint(fi1,fi2,fPhic); | |
830 | } | |
13918578 | 831 | |
7e5bf5af | 832 | |
833 | Int_t ncl = fCluLayer[layer]->GetEntries(); | |
834 | for (Int_t index=0; index<ncl; index++) { | |
00a7cc50 | 835 | AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index); |
7e5bf5af | 836 | if (!c) continue; |
837 | if (c->GetQ()<=0) continue; | |
838 | ||
839 | AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index); | |
840 | Double_t phi = arr->GetPhi(); | |
cfe729e0 | 841 | if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue; |
494fda7c | 842 | |
7e5bf5af | 843 | Double_t lambda = arr->GetLambda(); |
cfe729e0 | 844 | if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue; |
845 | ||
7e5bf5af | 846 | if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0; |
847 | if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0; | |
848 | Int_t orind = arr->GetOrInd(); | |
849 | trs->AddClusterSA(layer,orind); | |
850 | trs->AddClusterMark(layer,index); | |
851 | ||
cfe729e0 | 852 | nc++; |
853 | fLambdac=lambda; | |
854 | fPhiEstimate=phi; | |
cfe729e0 | 855 | |
7e5bf5af | 856 | fPointc[0]=arr->GetX(); |
857 | fPointc[1]=arr->GetY(); | |
858 | ||
cfe729e0 | 859 | } |
860 | return nc; | |
861 | } | |
13918578 | 862 | |
bef31448 | 863 | //________________________________________________________________ |
864 | void AliITStrackerSA::UpdatePoints(){ | |
865 | //update of points for the estimation of the curvature | |
13918578 | 866 | |
bef31448 | 867 | fPoint2[0]=fPoint3[0]; |
868 | fPoint2[1]=fPoint3[1]; | |
869 | fPoint3[0]=fPointc[0]; | |
870 | fPoint3[1]=fPointc[1]; | |
13918578 | 871 | |
872 | ||
13918578 | 873 | } |
13918578 | 874 | |
13918578 | 875 | //___________________________________________________________________ |
876 | 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){ | |
877 | ||
878 | //given (x,y) of three recpoints (in global coordinates) | |
879 | //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c | |
880 | ||
881 | Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1); | |
882 | if(den==0) return 0; | |
883 | a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den; | |
884 | b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1); | |
885 | c = -x1*x1-y1*y1-a*x1-b*y1; | |
886 | return 1; | |
887 | } | |
888 | //__________________________________________________________________________ | |
889 | 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){ | |
890 | ||
891 | //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer | |
892 | //c2 is -rlayer*rlayer | |
893 | ||
894 | if(a1==0) return 0; | |
3a2f227d | 895 | Double_t m = c2-c1; |
896 | Double_t aA = (b1*b1)/(a1*a1)+1; | |
897 | Double_t bB = (-2*m*b1/(a1*a1)); | |
898 | Double_t cC = c2+(m*m)/(a1*a1); | |
899 | Double_t dD = bB*bB-4*aA*cC; | |
900 | if(dD<0) return 0; | |
13918578 | 901 | |
3a2f227d | 902 | y1 = (-bB+TMath::Sqrt(dD))/(2*aA); |
903 | y2 = (-bB-TMath::Sqrt(dD))/(2*aA); | |
13918578 | 904 | x1 = (c2-c1-b1*y1)/a1; |
905 | x2 = (c2-c1-b1*y2)/a1; | |
906 | ||
907 | return 1; | |
908 | } | |
909 | //____________________________________________________________________ | |
910 | Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t | |
911 | x2,Double_t y2,Double_t x3,Double_t y3){ | |
912 | ||
913 | //calculates the curvature of track | |
914 | Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1); | |
915 | if(den==0) return 0; | |
916 | Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den; | |
917 | Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1); | |
918 | Double_t c = -x1*x1-y1*y1-a*x1-b*y1; | |
919 | Double_t xc=-a/2.; | |
920 | ||
921 | if((a*a+b*b-4*c)<0) return 0; | |
922 | Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.; | |
923 | if(rad==0) return 0; | |
924 | ||
925 | if((x1>0 && y1>0 && x1<xc)) rad*=-1; | |
926 | if((x1<0 && y1>0 && x1<xc)) rad*=-1; | |
927 | // if((x1<0 && y1<0 && x1<xc)) rad*=-1; | |
928 | // if((x1>0 && y1<0 && x1<xc)) rad*=-1; | |
929 | ||
930 | return 1/rad; | |
931 | ||
932 | } | |
7e5bf5af | 933 | |
934 | ||
13918578 | 935 | //____________________________________________________________________ |
936 | Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){ | |
937 | ||
938 | //Returns the point closest to pp | |
939 | ||
940 | Double_t diff1 = p1-pp; | |
941 | Double_t diff2 = p2-pp; | |
942 | ||
943 | if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1; | |
944 | else fPhiEstimate=p2; | |
945 | return fPhiEstimate; | |
946 | ||
947 | } | |
948 | ||
949 | ||
950 | //_________________________________________________________________ | |
7e5bf5af | 951 | Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const { |
13918578 | 952 | // returns track with lowes chi square |
953 | if(dim==1){ | |
7e5bf5af | 954 | //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0); |
955 | //return trk; | |
956 | return 0; | |
13918578 | 957 | } |
7e5bf5af | 958 | //if(dim==0) return 0; |
037efb75 | 959 | Double_t * chi2 = new Double_t[dim]; |
960 | Int_t * index = new Int_t[dim]; | |
13918578 | 961 | for(Int_t i=0;i<dim;i++){ |
962 | AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i); | |
963 | chi2[i]=trk->GetChi2(); | |
964 | index[i]=i; | |
965 | } | |
966 | ||
967 | Int_t w=0;Double_t value; | |
968 | Int_t lp; | |
969 | while(w<dim){ | |
970 | for(Int_t j=w+1;j<dim;j++){ | |
971 | if(chi2[w]<chi2[j]){ | |
bef31448 | 972 | value=chi2[w]; |
973 | chi2[w]=chi2[j]; | |
974 | chi2[j]=value; | |
975 | lp=index[w]; | |
976 | index[w]=index[j]; | |
977 | index[j]=lp; | |
13918578 | 978 | } |
979 | } | |
980 | w++; | |
981 | } | |
982 | ||
037efb75 | 983 | delete [] chi2; |
984 | delete [] index; | |
7e5bf5af | 985 | return index[dim-1]; |
13918578 | 986 | } |
987 | ||
988 | //__________________________________________________________ | |
989 | Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5, Int_t l6){ | |
990 | ||
991 | //function used to determine the track label | |
992 | ||
993 | Int_t lb[6] = {l1,l2,l3,l4,l5,l6}; | |
994 | Int_t aa[6]={1,1,1,1,1,1}; | |
995 | Int_t ff=0; | |
996 | Int_t ll=0; | |
997 | Int_t k=0;Int_t w=0;Int_t num=6; | |
998 | if(lb[5]==-1) num=5; | |
999 | ||
1000 | while(k<num){ | |
1001 | ||
1002 | for(Int_t i=k+1;i<num;i++){ | |
1003 | ||
1004 | if(lb[k]==lb[i] && aa[k]!=0){ | |
1005 | ||
1006 | aa[k]+=1; | |
1007 | aa[i]=0; | |
1008 | } | |
1009 | } | |
1010 | k++; | |
1011 | } | |
1012 | ||
1013 | while(w<num){ | |
1014 | ||
1015 | for(Int_t j=0;j<6;j++){ | |
1016 | if(aa[w]<aa[j]){ | |
1017 | ff=aa[w]; | |
1018 | aa[w]=aa[j]; | |
1019 | aa[j]=ff; | |
1020 | ll=lb[w]; | |
1021 | lb[w]=lb[j]; | |
1022 | lb[j]=ll; | |
1023 | } | |
1024 | } | |
1025 | w++; | |
1026 | } | |
1027 | if(num==6) return lb[5]; | |
1028 | else return lb[4]; | |
1029 | } | |
1030 | ||
1031 | //_____________________________________________________________________________ | |
1032 | 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, | |
1033 | Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t numberofpoints){ | |
1034 | ||
1035 | ||
1036 | //function used to assign label to the found track. If track is fake, the label is negative | |
1037 | ||
1038 | Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6}; | |
1039 | Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12}; | |
1040 | Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18}; | |
1041 | Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]); | |
1042 | Int_t lflag=0;Int_t num=6; | |
1043 | if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5; | |
1044 | ||
1045 | for(Int_t i=0;i<num;i++){ | |
1046 | if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1; | |
1047 | } | |
1048 | ||
1049 | if(lflag>=numberofpoints) return ll; | |
1050 | else return -ll; | |
1051 | ||
1052 | ||
1053 | } | |
1054 | ||
1055 | //_____________________________________________________________________________ | |
1056 | void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){ | |
1057 | // Set sizes of the phi and lambda windows used for track finding | |
1058 | fNloop = n; | |
1059 | if(phi){ // user defined values | |
1060 | fPhiWin = new Double_t[fNloop]; | |
1061 | fLambdaWin = new Double_t[fNloop]; | |
1062 | for(Int_t k=0;k<fNloop;k++){ | |
1063 | fPhiWin[k]=phi[k]; | |
1064 | fLambdaWin[k]=lam[k]; | |
1065 | } | |
1066 | } | |
1067 | else { // default values | |
627b6db6 | 1068 | |
1069 | Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047, | |
bef31448 | 1070 | 0.005,0.0053,0.0055, |
1071 | 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077, | |
1072 | 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097, | |
627b6db6 | 1073 | 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145}; |
1074 | Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005, | |
1075 | 0.005,0.005,0.006, | |
1076 | 0.006,0.006,0.006,0.007,0.007,0.007,0.007, | |
1077 | 0.007,0.007,0.007,0.007,0.007,0.007,0.007, | |
1078 | 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008}; | |
bef31448 | 1079 | |
627b6db6 | 1080 | if(fNloop!=33){ |
1081 | fNloop = 33; | |
13918578 | 1082 | } |
627b6db6 | 1083 | |
1084 | ||
13918578 | 1085 | fPhiWin = new Double_t[fNloop]; |
1086 | fLambdaWin = new Double_t[fNloop]; | |
1087 | ||
1088 | for(Int_t k=0;k<fNloop;k++){ | |
1089 | fPhiWin[k]=phid[k]; | |
1090 | fLambdaWin[k]=lambdad[k]; | |
1091 | } | |
1092 | ||
1093 | } | |
1094 | ||
1095 | } | |
7e5bf5af | 1096 | //_______________________________________________________________________ |
00a7cc50 | 1097 | void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Int_t module,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){ |
7e5bf5af | 1098 | //Returns values of phi (azimuthal) and lambda angles for a given cluster |
1099 | ||
1100 | Double_t rot[9]; fGeom->GetRotMatrix(module,rot); | |
1101 | Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det); | |
1102 | Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz); | |
1103 | ||
1104 | Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi(); | |
1105 | Double_t phi1=TMath::Pi()/2+alpha; | |
1106 | if (lay==1) phi1+=TMath::Pi(); | |
1107 | ||
1108 | Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1); | |
1109 | Float_t r=tx*cp+ty*sp; | |
1110 | ||
1111 | x= r*cp - cl->GetY()*sp; | |
1112 | y= r*sp + cl->GetY()*cp; | |
1113 | z=cl->GetZ(); | |
1114 | ||
1115 | phi=TMath::ATan2(y,x); | |
1116 | lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1]))); | |
1117 | } | |
13918578 | 1118 | |
7e5bf5af | 1119 | //________________________________________________________________________ |
00a7cc50 | 1120 | void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl, Int_t module,Float_t &sx,Float_t &sy, Float_t &sz){ |
7e5bf5af | 1121 | |
1122 | //returns x,y,z of cluster in global coordinates | |
1123 | ||
1124 | Double_t rot[9]; fGeom->GetRotMatrix(module,rot); | |
1125 | Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det); | |
1126 | ||
1127 | Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi(); | |
1128 | Double_t phi=TMath::Pi()/2+alpha; | |
1129 | if (lay==1) phi+=TMath::Pi(); | |
1130 | ||
1131 | Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi); | |
1132 | ||
1133 | sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2()); | |
1134 | sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2()); | |
1135 | sz = TMath::Sqrt(cl->GetSigmaZ2()); | |
1136 | ||
1137 | } |