]>
Commit | Line | Data |
---|---|---|
6d75e4b6 | 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 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // fast TPC cluster simulation // | |
21 | // // | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include <TParticle.h> | |
25 | ||
26 | #include "AliRunLoader.h" | |
27 | #include "AliRun.h" | |
28 | #include "AliMC.h" | |
29 | #include "AliTPC.h" | |
30 | #include "AliTPCParam.h" | |
31 | #include "AliTPCClustersArray.h" | |
32 | #include "AliTPCClustersRow.h" | |
33 | #include "AliTPCcluster.h" | |
34 | #include "AliComplexCluster.h" | |
35 | #include "AliTPCFast.h" | |
8c2b3fd7 | 36 | #include "AliLog.h" |
6d75e4b6 | 37 | |
38 | ClassImp(AliTPCFast) | |
39 | ||
40 | ||
41 | //_____________________________________________________________________________ | |
42 | void AliTPCFast::Hits2Clusters(AliRunLoader* runLoader) const | |
43 | { | |
44 | //-------------------------------------------------------- | |
45 | // TPC simple cluster generator from hits | |
46 | // obtained from the TPC Fast Simulator | |
47 | // The point errors are taken from the parametrization | |
48 | //-------------------------------------------------------- | |
49 | ||
50 | //----------------------------------------------------------------- | |
51 | // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl | |
52 | //----------------------------------------------------------------- | |
53 | // Adopted to Marian's cluster data structure by I.Belikov, CERN, | |
54 | // Jouri.Belikov@cern.ch | |
55 | //---------------------------------------------------------------- | |
56 | ||
57 | ///////////////////////////////////////////////////////////////////////////// | |
58 | // | |
59 | //--------------------------------------------------------------------- | |
60 | // ALICE TPC Cluster Parameters | |
61 | //-------------------------------------------------------------------- | |
62 | ||
63 | ||
64 | ||
65 | // Cluster width in rphi | |
66 | const Float_t kACrphi=0.18322; | |
67 | const Float_t kBCrphi=0.59551e-3; | |
68 | const Float_t kCCrphi=0.60952e-1; | |
69 | // Cluster width in z | |
70 | const Float_t kACz=0.19081; | |
71 | const Float_t kBCz=0.55938e-3; | |
72 | const Float_t kCCz=0.30428; | |
73 | ||
74 | ||
75 | AliLoader* loader = runLoader->GetLoader("TPCLoader"); | |
76 | if (!loader) { | |
8c2b3fd7 | 77 | AliError("No TPC loader found"); |
6d75e4b6 | 78 | return; |
79 | } | |
80 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); | |
81 | AliRun* aliRun = runLoader->GetAliRun(); | |
82 | if (!aliRun) { | |
8c2b3fd7 | 83 | AliError("Couldn't get AliRun object"); |
6d75e4b6 | 84 | return; |
85 | } | |
86 | AliTPC* tpc = (AliTPC*) aliRun->GetDetector("TPC"); | |
87 | if (!tpc) { | |
8c2b3fd7 | 88 | AliError("Couldn't get TPC detector"); |
6d75e4b6 | 89 | return; |
90 | } | |
91 | AliTPCParam* param = tpc->GetParam(); | |
92 | if (!param) { | |
8c2b3fd7 | 93 | AliError("No TPC parameters available"); |
6d75e4b6 | 94 | return; |
95 | } | |
96 | ||
97 | //if(fDefaults == 0) SetDefaults(); | |
98 | ||
99 | Float_t sigmaRphi,sigmaZ,clRphi,clZ; | |
100 | // | |
101 | TParticle *particle; // pointer to a given particle | |
102 | AliTPChit *tpcHit; // pointer to a sigle TPC hit | |
103 | Int_t sector; | |
104 | Int_t ipart; | |
105 | Float_t xyz[5]; | |
106 | Float_t pl,pt,tanth,rpad,ratio; | |
107 | Float_t cph,sph; | |
108 | ||
109 | //--------------------------------------------------------------- | |
110 | // Get the access to the tracks | |
111 | //--------------------------------------------------------------- | |
112 | ||
113 | TTree *tH = loader->TreeH(); | |
114 | if (tH == 0x0) | |
8c2b3fd7 | 115 | AliFatal("Can not find TreeH in folder"); |
116 | ||
6d75e4b6 | 117 | tpc->SetTreeAddress(); |
118 | ||
119 | Stat_t ntracks = tH->GetEntries(); | |
120 | ||
121 | //Switch to the output file | |
122 | ||
123 | if (loader->TreeR() == 0x0) loader->MakeTree("R"); | |
124 | ||
8c2b3fd7 | 125 | AliDebug(1,Form("param->GetTitle() = %s",param->GetTitle())); |
6d75e4b6 | 126 | |
127 | runLoader->CdGAFile(); | |
128 | //param->Write(param->GetTitle()); | |
129 | ||
130 | AliTPCClustersArray carray; | |
131 | carray.Setup(param); | |
132 | carray.SetClusterType("AliTPCcluster"); | |
133 | carray.MakeTree(loader->TreeR()); | |
134 | ||
135 | Int_t nclusters=0; //cluster counter | |
136 | ||
137 | //------------------------------------------------------------ | |
138 | // Loop over all sectors (72 sectors for 20 deg | |
139 | // segmentation for both lower and upper sectors) | |
140 | // Sectors 0-35 are lower sectors, 0-17 z>0, 17-35 z<0 | |
141 | // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0 | |
142 | // | |
143 | // First cluster for sector 0 starts at "0" | |
144 | //------------------------------------------------------------ | |
145 | ||
146 | for(Int_t isec=0;isec<param->GetNSector();isec++){ | |
147 | //MI change | |
148 | param->AdjustCosSin(isec,cph,sph); | |
149 | ||
150 | //------------------------------------------------------------ | |
151 | // Loop over tracks | |
152 | //------------------------------------------------------------ | |
153 | ||
154 | for(Int_t track=0;track<ntracks;track++){ | |
155 | tpc->ResetHits(); | |
156 | tH->GetEvent(track); | |
157 | // | |
158 | // Get number of the TPC hits | |
159 | // | |
160 | tpcHit = (AliTPChit*)tpc->FirstHit(-1); | |
161 | ||
162 | // Loop over hits | |
163 | // | |
164 | while(tpcHit){ | |
165 | ||
166 | if (tpcHit->fQ == 0.) { | |
167 | tpcHit = (AliTPChit*) tpc->NextHit(); | |
168 | continue; //information about track (I.Belikov) | |
169 | } | |
170 | sector=tpcHit->fSector; // sector number | |
171 | ||
172 | if(sector != isec){ | |
173 | tpcHit = (AliTPChit*) tpc->NextHit(); | |
174 | continue; | |
175 | } | |
176 | ipart=tpcHit->Track(); | |
177 | particle=aliRun->GetMCApp()->Particle(ipart); | |
178 | pl=particle->Pz(); | |
179 | pt=particle->Pt(); | |
180 | if(pt < 1.e-9) pt=1.e-9; | |
181 | tanth=pl/pt; | |
182 | tanth = TMath::Abs(tanth); | |
183 | rpad=TMath::Sqrt(tpcHit->X()*tpcHit->X() + tpcHit->Y()*tpcHit->Y()); | |
184 | ratio=0.001*rpad/pt; // pt must be in MeV/c - historical reason | |
185 | ||
186 | // space-point resolutions | |
187 | ||
188 | sigmaRphi=AliTPCcluster::SigmaY2(rpad,tanth,pt); | |
189 | sigmaZ =AliTPCcluster::SigmaZ2(rpad,tanth ); | |
190 | ||
191 | // cluster widths | |
192 | ||
193 | clRphi=kACrphi-kBCrphi*rpad*tanth+kCCrphi*ratio*ratio; | |
194 | clZ=kACz-kBCz*rpad*tanth+kCCz*tanth*tanth; | |
195 | ||
196 | // temporary protection | |
197 | ||
198 | if(sigmaRphi < 0.) sigmaRphi=0.4e-3; | |
199 | if(sigmaZ < 0.) sigmaZ=0.4e-3; | |
200 | if(clRphi < 0.) clRphi=2.5e-3; | |
201 | if(clZ < 0.) clZ=2.5e-5; | |
202 | ||
203 | // | |
204 | ||
205 | // | |
206 | // smearing --> rotate to the 1 (13) or to the 25 (49) sector, | |
207 | // then the inaccuracy in a X-Y plane is only along Y (pad row)! | |
208 | // | |
209 | Float_t xprim= tpcHit->X()*cph + tpcHit->Y()*sph; | |
210 | Float_t yprim=-tpcHit->X()*sph + tpcHit->Y()*cph; | |
211 | xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigmaRphi)); // y | |
212 | Float_t alpha=(isec < param->GetNInnerSector()) ? | |
213 | param->GetInnerAngle() : param->GetOuterAngle(); | |
214 | Float_t ymax=xprim*TMath::Tan(0.5*alpha); | |
215 | if (TMath::Abs(xyz[0])>ymax) xyz[0]=yprim; | |
216 | xyz[1]=gRandom->Gaus(tpcHit->Z(),TMath::Sqrt(sigmaZ)); // z | |
217 | if (TMath::Abs(xyz[1])>param->GetZLength()) xyz[1]=tpcHit->Z(); | |
218 | xyz[2]=sigmaRphi; // fSigmaY2 | |
219 | xyz[3]=sigmaZ; // fSigmaZ2 | |
220 | xyz[4]=tpcHit->fQ; // q | |
221 | ||
222 | AliTPCClustersRow *clrow=carray.GetRow(sector,tpcHit->fPadRow); | |
223 | if (!clrow) clrow=carray.CreateRow(sector,tpcHit->fPadRow); | |
224 | ||
225 | Int_t tracks[3]={tpcHit->Track(), -1, -1}; | |
226 | AliTPCcluster cluster(tracks,xyz); | |
227 | ||
228 | clrow->InsertCluster(&cluster); nclusters++; | |
229 | ||
230 | tpcHit = (AliTPChit*)tpc->NextHit(); | |
231 | ||
232 | ||
233 | } // end of loop over hits | |
234 | ||
235 | } // end of loop over tracks | |
236 | ||
237 | Int_t nrows=param->GetNRow(isec); | |
238 | for (Int_t irow=0; irow<nrows; irow++) { | |
239 | AliTPCClustersRow *clrow=carray.GetRow(isec,irow); | |
240 | if (!clrow) continue; | |
241 | carray.StoreRow(isec,irow); | |
242 | carray.ClearRow(isec,irow); | |
243 | } | |
244 | ||
245 | } // end of loop over sectors | |
246 | ||
247 | // cerr<<"Number of made clusters : "<<nclusters<<" \n"; | |
248 | loader->WriteRecPoints("OVERWRITE"); | |
249 | ||
250 | ||
251 | } // end of function | |
252 | ||
253 | //_________________________________________________________________ | |
254 | void AliTPCFast::Hits2ExactClustersSector(AliRunLoader* runLoader, | |
255 | AliTPCClustersArray* clustersArray, | |
256 | Int_t isec) const | |
257 | { | |
258 | //-------------------------------------------------------- | |
259 | //calculate exact cross point of track and given pad row | |
260 | //resulting values are expressed in "digit" coordinata | |
261 | //-------------------------------------------------------- | |
262 | ||
263 | //----------------------------------------------------------------- | |
264 | // Origin: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de | |
265 | //----------------------------------------------------------------- | |
266 | // | |
267 | if (clustersArray==0){ | |
268 | return; | |
269 | } | |
270 | AliLoader* loader = runLoader->GetLoader("TPCLoader"); | |
271 | if (!loader) { | |
8c2b3fd7 | 272 | AliError("No TPC loader found"); |
6d75e4b6 | 273 | return; |
274 | } | |
275 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); | |
276 | AliRun* aliRun = runLoader->GetAliRun(); | |
277 | if (!aliRun) { | |
8c2b3fd7 | 278 | AliError("Couldn't get AliRun object"); |
6d75e4b6 | 279 | return; |
280 | } | |
281 | AliTPC* tpc = (AliTPC*) aliRun->GetDetector("TPC"); | |
282 | if (!tpc) { | |
8c2b3fd7 | 283 | AliError("Couldn't get TPC detector"); |
6d75e4b6 | 284 | return; |
285 | } | |
286 | AliTPCParam* param = tpc->GetParam(); | |
287 | if (!param) { | |
8c2b3fd7 | 288 | AliError("No TPC parameters available"); |
6d75e4b6 | 289 | return; |
290 | } | |
291 | // | |
292 | TParticle *particle; // pointer to a given particle | |
293 | AliTPChit *tpcHit; // pointer to a sigle TPC hit | |
294 | // Int_t sector,nhits; | |
295 | Int_t ipart; | |
296 | const Int_t kcmaxhits=30000; | |
8c2b3fd7 | 297 | TVector * xxxx = new TVector(kcmaxhits*4); |
298 | TVector & xxx = *xxxx; | |
6d75e4b6 | 299 | Int_t maxhits = kcmaxhits; |
300 | //construct array for each padrow | |
301 | for (Int_t i=0; i<param->GetNRow(isec);i++) | |
302 | clustersArray->CreateRow(isec,i); | |
303 | ||
304 | //--------------------------------------------------------------- | |
305 | // Get the access to the tracks | |
306 | //--------------------------------------------------------------- | |
307 | ||
308 | TTree *tH = loader->TreeH(); | |
309 | if (tH == 0x0) | |
8c2b3fd7 | 310 | AliFatal("Can not find TreeH in folder"); |
311 | ||
6d75e4b6 | 312 | tpc->SetTreeAddress(); |
313 | ||
314 | Stat_t ntracks = tH->GetEntries(); | |
315 | Int_t npart = aliRun->GetMCApp()->GetNtrack(); | |
316 | //MI change | |
317 | TBranch * branch=0; | |
318 | if (tpc->GetHitType()>1) branch = tH->GetBranch("TPC2"); | |
319 | else branch = tH->GetBranch("TPC"); | |
320 | ||
321 | //------------------------------------------------------------ | |
322 | // Loop over tracks | |
323 | //------------------------------------------------------------ | |
324 | ||
325 | for(Int_t track=0;track<ntracks;track++){ | |
326 | Bool_t isInSector=kTRUE; | |
327 | tpc->ResetHits(); | |
328 | isInSector = tpc->TrackInVolume(isec,track); | |
329 | if (!isInSector) continue; | |
330 | //MI change | |
331 | branch->GetEntry(track); // get next track | |
332 | // | |
333 | // Get number of the TPC hits and a pointer | |
334 | // to the particles | |
335 | // Loop over hits | |
336 | // | |
337 | Int_t currentIndex=0; | |
338 | Int_t lastrow=-1; //last writen row | |
339 | ||
340 | //M.I. changes | |
341 | ||
342 | tpcHit = (AliTPChit*)tpc->FirstHit(-1); | |
343 | while(tpcHit){ | |
344 | ||
345 | Int_t sector=tpcHit->fSector; // sector number | |
346 | if(sector != isec){ | |
347 | tpcHit = (AliTPChit*) tpc->NextHit(); | |
348 | continue; | |
349 | } | |
350 | ||
351 | ipart=tpcHit->Track(); | |
352 | if (ipart<npart) particle=aliRun->GetMCApp()->Particle(ipart); | |
353 | ||
354 | //find row number | |
355 | ||
356 | Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()}; | |
357 | Int_t index[3]={1,isec,0}; | |
358 | Int_t currentrow = param->GetPadRow(x,index) ; | |
359 | if (currentrow<0) {tpcHit = (AliTPChit*)tpc->NextHit(); continue;} | |
360 | if (lastrow<0) lastrow=currentrow; | |
361 | if (currentrow==lastrow){ | |
362 | if ( currentIndex>=maxhits){ | |
363 | maxhits+=kcmaxhits; | |
364 | xxx.ResizeTo(4*maxhits); | |
365 | } | |
366 | xxx(currentIndex*4)=x[0]; | |
367 | xxx(currentIndex*4+1)=x[1]; | |
368 | xxx(currentIndex*4+2)=x[2]; | |
369 | xxx(currentIndex*4+3)=tpcHit->fQ; | |
370 | currentIndex++; | |
371 | } | |
372 | else | |
373 | if (currentIndex>2){ | |
374 | Float_t sumx=0; | |
375 | Float_t sumx2=0; | |
376 | Float_t sumx3=0; | |
377 | Float_t sumx4=0; | |
378 | Float_t sumy=0; | |
379 | Float_t sumxy=0; | |
380 | Float_t sumx2y=0; | |
381 | Float_t sumz=0; | |
382 | Float_t sumxz=0; | |
383 | Float_t sumx2z=0; | |
384 | Float_t sumq=0; | |
385 | for (Int_t index=0;index<currentIndex;index++){ | |
386 | Float_t x,x2,x3,x4; | |
387 | x=x2=x3=x4=xxx(index*4); | |
388 | x2*=x; | |
389 | x3*=x2; | |
390 | x4*=x3; | |
391 | sumx+=x; | |
392 | sumx2+=x2; | |
393 | sumx3+=x3; | |
394 | sumx4+=x4; | |
395 | sumy+=xxx(index*4+1); | |
396 | sumxy+=xxx(index*4+1)*x; | |
397 | sumx2y+=xxx(index*4+1)*x2; | |
398 | sumz+=xxx(index*4+2); | |
399 | sumxz+=xxx(index*4+2)*x; | |
400 | sumx2z+=xxx(index*4+2)*x2; | |
401 | sumq+=xxx(index*4+3); | |
402 | } | |
403 | Float_t centralPad = (param->GetNPads(isec,lastrow)-1)/2; | |
404 | Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+ | |
405 | sumx2*(sumx*sumx3-sumx2*sumx2); | |
406 | ||
407 | Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+ | |
408 | sumx2*(sumxy*sumx3-sumx2y*sumx2); | |
409 | Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+ | |
410 | sumx2*(sumxz*sumx3-sumx2z*sumx2); | |
411 | ||
412 | Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+ | |
413 | sumx2*(sumx*sumx2y-sumx2*sumxy); | |
414 | Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+ | |
415 | sumx2*(sumx*sumx2z-sumx2*sumxz); | |
416 | ||
417 | if (TMath::Abs(det)<0.00001){ | |
418 | tpcHit = (AliTPChit*)tpc->NextHit(); | |
419 | continue; | |
420 | } | |
421 | ||
422 | Float_t y=detay/det+centralPad; | |
423 | Float_t z=detaz/det; | |
424 | Float_t by=detby/det; //y angle | |
425 | Float_t bz=detbz/det; //z angle | |
426 | sumy/=Float_t(currentIndex); | |
427 | sumz/=Float_t(currentIndex); | |
428 | ||
429 | AliTPCClustersRow * row = (clustersArray->GetRow(isec,lastrow)); | |
430 | if (row!=0) { | |
431 | AliComplexCluster* cl = new((AliComplexCluster*)row->Append()) AliComplexCluster ; | |
432 | // AliComplexCluster cl; | |
433 | cl->fX=z; | |
434 | cl->fY=y; | |
435 | cl->fQ=sumq; | |
436 | cl->fSigmaX2=bz; | |
437 | cl->fSigmaY2=by; | |
438 | cl->fTracks[0]=ipart; | |
439 | } | |
440 | currentIndex=0; | |
441 | lastrow=currentrow; | |
442 | } //end of calculating cluster for given row | |
443 | ||
444 | ||
445 | tpcHit = (AliTPChit*)tpc->NextHit(); | |
446 | } // end of loop over hits | |
447 | } // end of loop over tracks | |
448 | //write padrows to tree | |
449 | for (Int_t ii=0; ii<param->GetNRow(isec);ii++) { | |
450 | clustersArray->StoreRow(isec,ii); | |
451 | clustersArray->ClearRow(isec,ii); | |
452 | } | |
453 | xxxx->Delete(); | |
454 | ||
455 | } | |
456 | ||
457 | ||
458 | void AliTPCFast::FindTrackHitsIntersection(AliRunLoader* runLoader, | |
459 | AliTPCClustersArray* clustersArray) const | |
460 | { | |
461 | ||
462 | // | |
463 | //fill clones array with intersection of current point with the | |
464 | //middle of the row | |
465 | AliLoader* loader = runLoader->GetLoader("TPCLoader"); | |
466 | if (!loader) { | |
8c2b3fd7 | 467 | AliError("No TPC loader found"); |
6d75e4b6 | 468 | return; |
469 | } | |
470 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); | |
471 | AliRun* aliRun = runLoader->GetAliRun(); | |
472 | if (!aliRun) { | |
8c2b3fd7 | 473 | AliError("Couldn't get AliRun object"); |
6d75e4b6 | 474 | return; |
475 | } | |
476 | AliTPC* tpc = (AliTPC*) aliRun->GetDetector("TPC"); | |
477 | if (!tpc) { | |
8c2b3fd7 | 478 | AliError("Couldn't get TPC detector"); |
6d75e4b6 | 479 | return; |
480 | } | |
481 | AliTPCParam* param = tpc->GetParam(); | |
482 | if (!param) { | |
8c2b3fd7 | 483 | AliError("No TPC parameters available"); |
6d75e4b6 | 484 | return; |
485 | } | |
486 | ||
487 | Int_t sector; | |
488 | Int_t ipart; | |
489 | ||
490 | const Int_t kcmaxhits=30000; | |
8c2b3fd7 | 491 | TVector * xxxx = new TVector(kcmaxhits*4); |
492 | TVector & xxx = *xxxx; | |
6d75e4b6 | 493 | Int_t maxhits = kcmaxhits; |
494 | ||
495 | // | |
496 | AliTPChit * tpcHit=0; | |
497 | tpcHit = (AliTPChit*)tpc->FirstHit2(-1); | |
498 | Int_t currentIndex=0; | |
499 | Int_t lastrow=-1; //last writen row | |
500 | ||
501 | while (tpcHit){ | |
502 | if (tpcHit==0) continue; | |
503 | sector=tpcHit->fSector; // sector number | |
504 | ipart=tpcHit->Track(); | |
505 | ||
506 | //find row number | |
507 | ||
508 | Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()}; | |
509 | Int_t index[3]={1,sector,0}; | |
510 | Int_t currentrow = param->GetPadRow(x,index) ; | |
511 | if (currentrow<0) continue; | |
512 | if (lastrow<0) lastrow=currentrow; | |
513 | if (currentrow==lastrow){ | |
514 | if ( currentIndex>=maxhits){ | |
515 | maxhits+=kcmaxhits; | |
516 | xxx.ResizeTo(4*maxhits); | |
517 | } | |
518 | xxx(currentIndex*4)=x[0]; | |
519 | xxx(currentIndex*4+1)=x[1]; | |
520 | xxx(currentIndex*4+2)=x[2]; | |
521 | xxx(currentIndex*4+3)=tpcHit->fQ; | |
522 | currentIndex++; | |
523 | } | |
524 | else | |
525 | if (currentIndex>2){ | |
526 | Float_t sumx=0; | |
527 | Float_t sumx2=0; | |
528 | Float_t sumx3=0; | |
529 | Float_t sumx4=0; | |
530 | Float_t sumy=0; | |
531 | Float_t sumxy=0; | |
532 | Float_t sumx2y=0; | |
533 | Float_t sumz=0; | |
534 | Float_t sumxz=0; | |
535 | Float_t sumx2z=0; | |
536 | Float_t sumq=0; | |
537 | for (Int_t index=0;index<currentIndex;index++){ | |
538 | Float_t x,x2,x3,x4; | |
539 | x=x2=x3=x4=xxx(index*4); | |
540 | x2*=x; | |
541 | x3*=x2; | |
542 | x4*=x3; | |
543 | sumx+=x; | |
544 | sumx2+=x2; | |
545 | sumx3+=x3; | |
546 | sumx4+=x4; | |
547 | sumy+=xxx(index*4+1); | |
548 | sumxy+=xxx(index*4+1)*x; | |
549 | sumx2y+=xxx(index*4+1)*x2; | |
550 | sumz+=xxx(index*4+2); | |
551 | sumxz+=xxx(index*4+2)*x; | |
552 | sumx2z+=xxx(index*4+2)*x2; | |
553 | sumq+=xxx(index*4+3); | |
554 | } | |
555 | Float_t centralPad = (param->GetNPads(sector,lastrow)-1)/2; | |
556 | Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+ | |
557 | sumx2*(sumx*sumx3-sumx2*sumx2); | |
558 | ||
559 | Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+ | |
560 | sumx2*(sumxy*sumx3-sumx2y*sumx2); | |
561 | Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+ | |
562 | sumx2*(sumxz*sumx3-sumx2z*sumx2); | |
563 | ||
564 | Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+ | |
565 | sumx2*(sumx*sumx2y-sumx2*sumxy); | |
566 | Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+ | |
567 | sumx2*(sumx*sumx2z-sumx2*sumxz); | |
568 | ||
569 | Float_t y=detay/det+centralPad; | |
570 | Float_t z=detaz/det; | |
571 | Float_t by=detby/det; //y angle | |
572 | Float_t bz=detbz/det; //z angle | |
573 | sumy/=Float_t(currentIndex); | |
574 | sumz/=Float_t(currentIndex); | |
575 | ||
576 | AliComplexCluster cl; | |
577 | cl.fX=z; | |
578 | cl.fY=y; | |
579 | cl.fQ=sumq; | |
580 | cl.fSigmaX2=bz; | |
581 | cl.fSigmaY2=by; | |
582 | cl.fTracks[0]=ipart; | |
583 | ||
584 | AliTPCClustersRow * row = (clustersArray->GetRow(sector,lastrow)); | |
585 | if (row!=0) row->InsertCluster(&cl); | |
586 | currentIndex=0; | |
587 | lastrow=currentrow; | |
588 | } //end of calculating cluster for given row | |
589 | ||
590 | } // end of loop over hits | |
591 | xxxx->Delete(); | |
592 | ||
593 | } | |
594 |