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7f4044f0 1//-------------------------------------------------------------------------
2// Implementation of the ITS clusterer V2 class
3//
4// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
5//-------------------------------------------------------------------------
6//uncomment the line below for running with V1 cluster finder classes
7//#define V1
8
9#include "AliRun.h"
10
11#include "AliITSclustererV2.h"
12#include "AliITSclusterV2.h"
7941072e 13#include "AliRawReader.h"
c391f9d9 14#include "AliITSRawStreamSPD.h"
15#include "AliITSRawStreamSDD.h"
16#include "AliITSRawStreamSSD.h"
7f4044f0 17
7f4044f0 18#include <TFile.h>
19#include <TTree.h>
20#include <TClonesArray.h>
21#include "AliITSgeom.h"
22#include "AliITSdigit.h"
23
24ClassImp(AliITSclustererV2)
25
26extern AliRun *gAlice;
27
28AliITSclustererV2::AliITSclustererV2(const AliITSgeom *geom) {
29 //------------------------------------------------------------
30 // Standard constructor
31 //------------------------------------------------------------
32 AliITSgeom *g=(AliITSgeom*)geom;
33
34 fEvent=0;
35 fI=0;
36
37 Int_t mmax=geom->GetIndexMax();
c630aafd 38 if (mmax>2200) {
caa92d6a 39 Fatal("AliITSclustererV2","Too many ITS subdetectors !");
c630aafd 40 }
7f4044f0 41 Int_t m;
42 for (m=0; m<mmax; m++) {
43 Int_t lay,lad,det; g->GetModuleId(m,lay,lad,det);
44 Float_t x,y,z; g->GetTrans(lay,lad,det,x,y,z);
45 Double_t rot[9]; g->GetRotMatrix(lay,lad,det,rot);
46 fYshift[m] = x*rot[0] + y*rot[1];
47 fZshift[m] = (Double_t)z;
48 fNdet[m] = (lad-1)*g->GetNdetectors(lay) + (det-1);
49 }
c391f9d9 50 fNModules = g->GetIndexMax();
7f4044f0 51
52 //SPD geometry
53 fLastSPD1=g->GetModuleIndex(2,1,1)-1;
54 fNySPD=256; fNzSPD=160;
55 fYpitchSPD=0.0050;
56 fZ1pitchSPD=0.0425; fZ2pitchSPD=0.0625;
57 fHwSPD=0.64; fHlSPD=3.48;
58 fYSPD[0]=0.5*fYpitchSPD;
59 for (m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
60 fZSPD[0]=fZ1pitchSPD;
61 for (m=1; m<fNzSPD; m++) {
62 Double_t dz=fZ1pitchSPD;
63 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
64 m==127 || m==128) dz=fZ2pitchSPD;
65 fZSPD[m]=fZSPD[m-1]+dz;
66 }
67 for (m=0; m<fNzSPD; m++) {
68 Double_t dz=0.5*fZ1pitchSPD;
69 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
70 m==127 || m==128) dz=0.5*fZ2pitchSPD;
71 fZSPD[m]-=dz;
72 }
73
74 //SDD geometry
75 fNySDD=256; fNzSDD=256;
76 fYpitchSDD=0.01825;
77 fZpitchSDD=0.02940;
78 fHwSDD=3.5085; fHlSDD=3.7632;
79 fYoffSDD=0.0425;
80
81 //SSD geometry
82 fLastSSD1=g->GetModuleIndex(6,1,1)-1;
83 fYpitchSSD=0.0095;
84 fHwSSD=3.65;
85 fHlSSD=2.00;
86 fTanP=0.0275;
87 fTanN=0.0075;
88}
89
c630aafd 90Int_t AliITSclustererV2::Digits2Clusters(TTree *dTree, TTree *cTree) {
7f4044f0 91 //------------------------------------------------------------
92 // This function creates ITS clusters
93 //------------------------------------------------------------
94 Int_t ncl=0;
7f4044f0 95
7f4044f0 96 if (!dTree) {
c630aafd 97 Error("Digits2Clusters","Can't get the tree with digits !");
98 return 1;
7f4044f0 99 }
100
101 TClonesArray *digitsSPD=new TClonesArray("AliITSdigitSPD",3000);
102 dTree->SetBranchAddress("ITSDigitsSPD",&digitsSPD);
103 TClonesArray *digitsSDD=new TClonesArray("AliITSdigitSDD",3000);
104 dTree->SetBranchAddress("ITSDigitsSDD",&digitsSDD);
105 TClonesArray *digitsSSD=new TClonesArray("AliITSdigitSSD",3000);
106 dTree->SetBranchAddress("ITSDigitsSSD",&digitsSSD);
107
7f4044f0 108 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
c630aafd 109 TBranch *branch=cTree->GetBranch("Clusters");
110 if (!branch) cTree->Branch("Clusters",&clusters);
111 else branch->SetAddress(&clusters);
112
113 Int_t mmax=(Int_t)dTree->GetEntries();
7f4044f0 114
115 for (fI=0; fI<mmax; fI++) {
116 dTree->GetEvent(fI);
117
118 if (digitsSPD->GetEntriesFast()!=0)
119 FindClustersSPD(digitsSPD,clusters);
120 else if(digitsSDD->GetEntriesFast()!=0)
121 FindClustersSDD(digitsSDD,clusters);
122 else if(digitsSSD->GetEntriesFast()!=0)
123 FindClustersSSD(digitsSSD,clusters);
124
125 ncl+=clusters->GetEntriesFast();
126
c630aafd 127 cTree->Fill();
7f4044f0 128
129 digitsSPD->Clear();
130 digitsSDD->Clear();
131 digitsSSD->Clear();
132 clusters->Clear();
133 }
c630aafd 134
135 //cTree->Write();
7f4044f0 136
137 delete clusters;
138
139 delete digitsSPD;
140 delete digitsSDD;
141 delete digitsSSD;
142
7941072e 143 //delete dTree;
144
c630aafd 145 Info("Digits2Clusters","Number of found clusters : %d",ncl);
7f4044f0 146
c630aafd 147 return 0;
7f4044f0 148}
149
7941072e 150void AliITSclustererV2::Digits2Clusters(AliRawReader* rawReader) {
c391f9d9 151 //------------------------------------------------------------
152 // This function creates ITS clusters from raw data
153 //------------------------------------------------------------
7941072e 154 AliRunLoader* runLoader = AliRunLoader::GetRunLoader();
155 if (!runLoader) {
156 Error("Digits2Clusters", "no run loader found");
157 return;
158 }
159 AliLoader* itsLoader = runLoader->GetLoader("ITSLoader");
160 if (!itsLoader) {
161 Error("Digits2Clusters", "no loader for ITS found");
c391f9d9 162 return;
163 }
7941072e 164 if (!itsLoader->TreeR()) itsLoader->MakeTree("R");
165 TTree* cTree = itsLoader->TreeR();
c391f9d9 166
c391f9d9 167 TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
7941072e 168 cTree->Branch("Clusters",&array);
c391f9d9 169 delete array;
170
f1e0c1c5 171 TClonesArray** clusters = new TClonesArray*[fNModules];
04fa961a 172 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
173 clusters[iModule] = NULL;
174 }
c391f9d9 175 // one TClonesArray per module
176
7941072e 177 rawReader->Reset();
178 AliITSRawStreamSPD inputSPD(rawReader);
c391f9d9 179 FindClustersSPD(&inputSPD, clusters);
7941072e 180
181 rawReader->Reset();
182 AliITSRawStreamSDD inputSDD(rawReader);
c391f9d9 183 FindClustersSDD(&inputSDD, clusters);
7941072e 184
185 rawReader->Reset();
186 AliITSRawStreamSSD inputSSD(rawReader);
c391f9d9 187 FindClustersSSD(&inputSSD, clusters);
188
189 // write all clusters to the tree
190 Int_t nClusters = 0;
191 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
04fa961a 192 array = clusters[iModule];
c391f9d9 193 if (!array) {
194 Error("Digits2Clusters", "data for module %d missing!", iModule);
195 array = new TClonesArray("AliITSclusterV2");
196 }
7941072e 197 cTree->SetBranchAddress("Clusters", &array);
198 cTree->Fill();
c391f9d9 199 nClusters += array->GetEntriesFast();
200 delete array;
201 }
7941072e 202 itsLoader->WriteRecPoints("OVERWRITE");
c391f9d9 203
04fa961a 204 delete[] clusters;
205
c391f9d9 206 Info("Digits2Clusters", "total number of found clusters in ITS: %d\n",
207 nClusters);
208}
209
7f4044f0 210//**** Fast clusters *******************************
211#include "TParticle.h"
212
213#include "AliITS.h"
214#include "AliITSmodule.h"
215#include "AliITSRecPoint.h"
216#include "AliITSsimulationFastPoints.h"
217#include "AliITSRecPoint.h"
218
219static void CheckLabels(Int_t lab[3]) {
220 //------------------------------------------------------------
221 // Tries to find mother's labels
222 //------------------------------------------------------------
223 Int_t label=lab[0];
224 if (label>=0) {
225 TParticle *part=(TParticle*)gAlice->Particle(label);
226 label=-3;
227 while (part->P() < 0.005) {
228 Int_t m=part->GetFirstMother();
c630aafd 229 if (m<0) {
230 Info("CheckLabels","Primary momentum: %f",part->P());
231 break;
232 }
1cca57bf 233 if (part->GetStatusCode()>0) {
c630aafd 234 Info("CheckLabels","Primary momentum: %f",part->P());
235 break;
1cca57bf 236 }
7f4044f0 237 label=m;
238 part=(TParticle*)gAlice->Particle(label);
239 }
240 if (lab[1]<0) lab[1]=label;
241 else if (lab[2]<0) lab[2]=label;
242 else ;//cerr<<"CheckLabels : No empty labels !\n";
243 }
244}
245
1cca57bf 246void AliITSclustererV2::RecPoints2Clusters
247(const TClonesArray *points, Int_t idx, TClonesArray *clusters) {
7f4044f0 248 //------------------------------------------------------------
1cca57bf 249 // Conversion AliITSRecPoint -> AliITSclusterV2 for the ITS
250 // subdetector indexed by idx
7f4044f0 251 //------------------------------------------------------------
252 TClonesArray &cl=*clusters;
253 Int_t ncl=points->GetEntriesFast();
254 for (Int_t i=0; i<ncl; i++) {
255 AliITSRecPoint *p = (AliITSRecPoint *)points->UncheckedAt(i);
256 Float_t lp[5];
1cca57bf 257 lp[0]=-p->GetX()-fYshift[idx]; if (idx<=fLastSPD1) lp[0]*=-1; //SPD1
258 lp[1]=p->GetZ()+fZshift[idx];
259 lp[2]=p->GetSigmaX2();
260 lp[3]=p->GetSigmaZ2();
261 lp[4]=p->GetQ();
7f4044f0 262 Int_t lab[4];
263 lab[0]=p->GetLabel(0); lab[1]=p->GetLabel(1); lab[2]=p->GetLabel(2);
1cca57bf 264 lab[3]=fNdet[idx];
7f4044f0 265 CheckLabels(lab);
266 new (cl[i]) AliITSclusterV2(lab,lp);
267 }
268}
269
c630aafd 270Int_t AliITSclustererV2::Hits2Clusters(TTree *hTree, TTree *cTree) {
7f4044f0 271 //------------------------------------------------------------
272 // This function creates ITS clusters
273 //------------------------------------------------------------
7f4044f0 274 if (!gAlice) {
c630aafd 275 Error("Hits2Clusters","gAlice==0 !");
276 return 1;
7f4044f0 277 }
278
279 AliITS *its = (AliITS*)gAlice->GetModule("ITS");
280 if (!its) {
c630aafd 281 Error("Hits2Clusters","Can't find the ITS !");
282 return 2;
7f4044f0 283 }
284 AliITSgeom *geom=its->GetITSgeom();
285 Int_t mmax=geom->GetIndexMax();
286
287 its->InitModules(-1,mmax);
c630aafd 288 its->FillModules(hTree,0);
7f4044f0 289
7f4044f0 290 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
c630aafd 291 TBranch *branch=cTree->GetBranch("Clusters");
292 if (!branch) cTree->Branch("Clusters",&clusters);
293 else branch->SetAddress(&clusters);
7f4044f0 294
295 static TClonesArray *points=its->RecPoints();
296 AliITSsimulationFastPoints sim;
297 Int_t ncl=0;
298 for (Int_t m=0; m<mmax; m++) {
299 AliITSmodule *mod=its->GetModule(m);
300 sim.CreateFastRecPoints(mod,m,gRandom);
301
1cca57bf 302 RecPoints2Clusters(points, m, clusters);
7f4044f0 303 its->ResetRecPoints();
304
305 ncl+=clusters->GetEntriesFast();
c630aafd 306 cTree->Fill();
7f4044f0 307 clusters->Clear();
308 }
7f4044f0 309
c630aafd 310 Info("Hits2Clusters","Number of found fast clusters : %d",ncl);
311
312 //cTree->Write();
7f4044f0 313
314 delete clusters;
315
c630aafd 316 return 0;
7f4044f0 317}
318
319//***********************************
320
321#ifndef V1
322
323void AliITSclustererV2::
324FindCluster(Int_t k,Int_t maxz,AliBin *bins,Int_t &n,Int_t *idx) {
325 //------------------------------------------------------------
326 // returns an array of indices of digits belonging to the cluster
327 // (needed when the segmentation is not regular)
328 //------------------------------------------------------------
329 if (n<200) idx[n++]=bins[k].GetIndex();
330 bins[k].Use();
331
332 if (bins[k-maxz].IsNotUsed()) FindCluster(k-maxz,maxz,bins,n,idx);
333 if (bins[k-1 ].IsNotUsed()) FindCluster(k-1 ,maxz,bins,n,idx);
334 if (bins[k+maxz].IsNotUsed()) FindCluster(k+maxz,maxz,bins,n,idx);
335 if (bins[k+1 ].IsNotUsed()) FindCluster(k+1 ,maxz,bins,n,idx);
336 /*
337 if (bins[k-maxz-1].IsNotUsed()) FindCluster(k-maxz-1,maxz,bins,n,idx);
338 if (bins[k-maxz+1].IsNotUsed()) FindCluster(k-maxz+1,maxz,bins,n,idx);
339 if (bins[k+maxz-1].IsNotUsed()) FindCluster(k+maxz-1,maxz,bins,n,idx);
340 if (bins[k+maxz+1].IsNotUsed()) FindCluster(k+maxz+1,maxz,bins,n,idx);
341 */
342}
343
344void AliITSclustererV2::
345FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
346 //------------------------------------------------------------
347 // Actual SPD cluster finder
348 //------------------------------------------------------------
c391f9d9 349 Int_t kNzBins = fNzSPD + 2;
350 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
7f4044f0 351
352 Int_t ndigits=digits->GetEntriesFast();
353 AliBin *bins=new AliBin[kMAXBIN];
354
355 Int_t k;
356 AliITSdigitSPD *d=0;
357 for (k=0; k<ndigits; k++) {
358 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
359 Int_t i=d->GetCoord2()+1; //y
360 Int_t j=d->GetCoord1()+1;
c391f9d9 361 bins[i*kNzBins+j].SetIndex(k);
362 bins[i*kNzBins+j].SetMask(1);
7f4044f0 363 }
364
365 Int_t n=0; TClonesArray &cl=*clusters;
366 for (k=0; k<kMAXBIN; k++) {
367 if (!bins[k].IsNotUsed()) continue;
368 Int_t ni=0, idx[200];
c391f9d9 369 FindCluster(k,kNzBins,bins,ni,idx);
c630aafd 370 if (ni==200) {
371 Info("FindClustersSPD","Too big cluster !");
372 continue;
373 }
7f4044f0 374 Int_t lab[4];
375 lab[0]=-2;
376 lab[1]=-2;
377 lab[2]=-2;
378 lab[3]=fNdet[fI];
379
380 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
381 Int_t ymin=d->GetCoord2(),ymax=ymin;
382 Int_t zmin=d->GetCoord1(),zmax=zmin;
383 Float_t y=0.,z=0.,q=0.;
384 for (Int_t l=0; l<ni; l++) {
385 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[l]);
386
387 if (ymin > d->GetCoord2()) ymin=d->GetCoord2();
388 if (ymax < d->GetCoord2()) ymax=d->GetCoord2();
389 if (zmin > d->GetCoord1()) zmin=d->GetCoord1();
390 if (zmax < d->GetCoord1()) zmax=d->GetCoord1();
391
392 Int_t lab0=(d->GetTracks())[0];
393 if (lab0>=0) {
394 if (lab[0]<0) {
395 lab[0]=lab0;
396 } else if (lab[1]<0) {
397 if (lab0!=lab[0]) lab[1]=lab0;
398 } else if (lab[2]<0) {
399 if (lab0!=lab[0])
400 if (lab0!=lab[1]) lab[2]=lab0;
401 }
402 }
403 Float_t qq=d->GetSignal();
404 y+=qq*fYSPD[d->GetCoord2()]; z+=qq*fZSPD[d->GetCoord1()]; q+=qq;
405 }
406 y/=q; z/=q;
407 y-=fHwSPD; z-=fHlSPD;
408
409 Float_t lp[5];
410 lp[0]=-y-fYshift[fI]; if (fI<=fLastSPD1) lp[0]=-lp[0];
411 lp[1]= z+fZshift[fI];
412 lp[2]= fYpitchSPD*fYpitchSPD/12.;
413 lp[3]= fZ1pitchSPD*fZ1pitchSPD/12.;
414 //lp[4]= q;
415 lp[4]= (zmax-zmin+1)*100 + (ymax-ymin+1);
416
417 //CheckLabels(lab);
c391f9d9 418 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
7f4044f0 419 new (cl[n]) AliITSclusterV2(lab,lp); n++;
420 }
421
38bcdcc1 422 delete [] bins;
7f4044f0 423}
424
c391f9d9 425void AliITSclustererV2::FindClustersSPD(AliITSRawStream* input,
426 TClonesArray** clusters)
427{
428 //------------------------------------------------------------
429 // Actual SPD cluster finder for raw data
430 //------------------------------------------------------------
431
432 Int_t nClustersSPD = 0;
433 Int_t kNzBins = fNzSPD + 2;
434 Int_t kNyBins = fNySPD + 2;
435 Int_t kMaxBin = kNzBins * kNyBins;
436 AliBin* bins = NULL;
437
438 // read raw data input stream
439 while (kTRUE) {
440 Bool_t next = input->Next();
441 if (!next || input->IsNewModule()) {
442 Int_t iModule = input->GetPrevModuleID();
443
444 // when all data from a module was read, search for clusters
445 if (bins) {
446 clusters[iModule] = new TClonesArray("AliITSclusterV2");
447 Int_t nClusters = 0;
448
449 for (Int_t iBin = 0; iBin < kMaxBin; iBin++) {
450 if (bins[iBin].IsUsed()) continue;
451 Int_t nBins = 0;
452 Int_t idxBins[200];
453 FindCluster(iBin, kNzBins, bins, nBins, idxBins);
454 if (nBins == 200) {
455 Error("FindClustersSPD", "SPD: Too big cluster !\n");
456 continue;
457 }
458
459 Int_t label[4];
460 label[0] = -2;
461 label[1] = -2;
462 label[2] = -2;
463// label[3] = iModule;
464 label[3] = fNdet[iModule];
465
466 Int_t ymin = (idxBins[0] / kNzBins) - 1;
467 Int_t ymax = ymin;
468 Int_t zmin = (idxBins[0] % kNzBins) - 1;
469 Int_t zmax = zmin;
470 Float_t y = 0.;
471 Float_t z = 0.;
472 Float_t q = 0.;
473 for (Int_t idx = 0; idx < nBins; idx++) {
474 Int_t iy = (idxBins[idx] / kNzBins) - 1;
475 Int_t iz = (idxBins[idx] % kNzBins) - 1;
476 if (ymin > iy) ymin = iy;
477 if (ymax < iy) ymax = iy;
478 if (zmin > iz) zmin = iz;
479 if (zmax < iz) zmax = iz;
480
481 Float_t qBin = bins[idxBins[idx]].GetQ();
482 y += qBin * fYSPD[iy];
483 z += qBin * fZSPD[iz];
484 q += qBin;
485 }
486 y /= q;
487 z /= q;
488 y -= fHwSPD;
489 z -= fHlSPD;
490
491 Float_t hit[5]; // y, z, sigma(y)^2, sigma(z)^2, charge
492 hit[0] = -y-fYshift[iModule];
493 if (iModule <= fLastSPD1) hit[0] = -hit[0];
494 hit[1] = z+fZshift[iModule];
495 hit[2] = fYpitchSPD*fYpitchSPD/12.;
496 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
497// hit[4] = q;
498 hit[4] = (zmax-zmin+1)*100 + (ymax-ymin+1);
499
500 //CheckLabels(label);
501 new (clusters[iModule]->AddrAt(nClusters))
502 AliITSclusterV2(label, hit);
503 nClusters++;
504 }
505
506 nClustersSPD += nClusters;
507 delete bins;
508 }
509
510 if (!next) break;
511 bins = new AliBin[kMaxBin];
512 }
513
514 // fill the current digit into the bins array
515 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
516 bins[index].SetIndex(index);
517 bins[index].SetMask(1);
518 bins[index].SetQ(1);
519 }
520
521 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
522}
523
524
7f4044f0 525Bool_t AliITSclustererV2::IsMaximum(Int_t k,Int_t max,const AliBin *bins) {
526 //------------------------------------------------------------
527 //is this a local maximum ?
528 //------------------------------------------------------------
529 UShort_t q=bins[k].GetQ();
530 if (q==1023) return kFALSE;
531 if (bins[k-max].GetQ() > q) return kFALSE;
532 if (bins[k-1 ].GetQ() > q) return kFALSE;
533 if (bins[k+max].GetQ() > q) return kFALSE;
534 if (bins[k+1 ].GetQ() > q) return kFALSE;
535 if (bins[k-max-1].GetQ() > q) return kFALSE;
536 if (bins[k+max-1].GetQ() > q) return kFALSE;
537 if (bins[k+max+1].GetQ() > q) return kFALSE;
538 if (bins[k-max+1].GetQ() > q) return kFALSE;
539 return kTRUE;
540}
541
542void AliITSclustererV2::
543FindPeaks(Int_t k,Int_t max,AliBin *b,Int_t *idx,UInt_t *msk,Int_t& n) {
544 //------------------------------------------------------------
545 //find local maxima
546 //------------------------------------------------------------
547 if (n<31)
548 if (IsMaximum(k,max,b)) {
549 idx[n]=k; msk[n]=(2<<n);
550 n++;
551 }
552 b[k].SetMask(0);
553 if (b[k-max].GetMask()&1) FindPeaks(k-max,max,b,idx,msk,n);
554 if (b[k-1 ].GetMask()&1) FindPeaks(k-1 ,max,b,idx,msk,n);
555 if (b[k+max].GetMask()&1) FindPeaks(k+max,max,b,idx,msk,n);
556 if (b[k+1 ].GetMask()&1) FindPeaks(k+1 ,max,b,idx,msk,n);
557}
558
559void AliITSclustererV2::
560MarkPeak(Int_t k, Int_t max, AliBin *bins, UInt_t m) {
561 //------------------------------------------------------------
562 //mark this peak
563 //------------------------------------------------------------
564 UShort_t q=bins[k].GetQ();
565
566 bins[k].SetMask(bins[k].GetMask()|m);
567
568 if (bins[k-max].GetQ() <= q)
569 if ((bins[k-max].GetMask()&m) == 0) MarkPeak(k-max,max,bins,m);
570 if (bins[k-1 ].GetQ() <= q)
571 if ((bins[k-1 ].GetMask()&m) == 0) MarkPeak(k-1 ,max,bins,m);
572 if (bins[k+max].GetQ() <= q)
573 if ((bins[k+max].GetMask()&m) == 0) MarkPeak(k+max,max,bins,m);
574 if (bins[k+1 ].GetQ() <= q)
575 if ((bins[k+1 ].GetMask()&m) == 0) MarkPeak(k+1 ,max,bins,m);
576}
577
578void AliITSclustererV2::
579MakeCluster(Int_t k,Int_t max,AliBin *bins,UInt_t m,AliITSclusterV2 &c) {
580 //------------------------------------------------------------
581 //make cluster using digits of this peak
582 //------------------------------------------------------------
583 Float_t q=(Float_t)bins[k].GetQ();
584 Int_t i=k/max, j=k-i*max;
585
586 c.SetQ(c.GetQ()+q);
587 c.SetY(c.GetY()+i*q);
588 c.SetZ(c.GetZ()+j*q);
589 c.SetSigmaY2(c.GetSigmaY2()+i*i*q);
590 c.SetSigmaZ2(c.GetSigmaZ2()+j*j*q);
591
592 bins[k].SetMask(0xFFFFFFFE);
593
594 if (bins[k-max].GetMask() == m) MakeCluster(k-max,max,bins,m,c);
595 if (bins[k-1 ].GetMask() == m) MakeCluster(k-1 ,max,bins,m,c);
596 if (bins[k+max].GetMask() == m) MakeCluster(k+max,max,bins,m,c);
597 if (bins[k+1 ].GetMask() == m) MakeCluster(k+1 ,max,bins,m,c);
598}
599
600void AliITSclustererV2::
c391f9d9 601FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
602 const TClonesArray *digits, TClonesArray *clusters) {
7f4044f0 603 //------------------------------------------------------------
604 // Actual SDD cluster finder
605 //------------------------------------------------------------
7f4044f0 606 Int_t ncl=0; TClonesArray &cl=*clusters;
607 for (Int_t s=0; s<2; s++)
c391f9d9 608 for (Int_t i=0; i<nMaxBin; i++) {
7f4044f0 609 if (bins[s][i].IsUsed()) continue;
610 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
c391f9d9 611 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
7f4044f0 612
613 if (npeaks>30) continue;
614
615 Int_t k,l;
616 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
617 if (idx[k] < 0) continue; //this peak is already removed
618 for (l=k+1; l<npeaks; l++) {
619 if (idx[l] < 0) continue; //this peak is already removed
c391f9d9 620 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
621 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
7f4044f0 622 Int_t di=TMath::Abs(ki - li);
623 Int_t dj=TMath::Abs(kj - lj);
624 if (di>1 || dj>1) continue;
625 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
626 msk[l]=msk[k];
627 idx[l]*=-1;
628 } else {
629 msk[k]=msk[l];
630 idx[k]*=-1;
631 break;
632 }
633 }
634 }
635
636 for (k=0; k<npeaks; k++) {
c391f9d9 637 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
7f4044f0 638 }
639
640 for (k=0; k<npeaks; k++) {
641 if (idx[k] < 0) continue; //removed peak
642 AliITSclusterV2 c;
c391f9d9 643 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
7f4044f0 644
645 //if (c.GetQ() < 200) continue; //noise cluster
646
647 /*
648 Float_t s2 = c.GetSigmaY2()/c.GetQ() - c.GetY()*c.GetY();
649 Float_t w=par->GetPadPitchWidth(sec);
650 c.SetSigmaY2((s2 + 1./12.)*w*w);
651 if (s2 != 0.) {
652 c.SetSigmaY2(c.GetSigmaY2()*0.108);
653 if (sec<par->GetNInnerSector()) c.SetSigmaY2(c.GetSigmaY2()*2.07);
654 }
655
656 s2 = c.GetSigmaZ2()/c.GetQ() - c.GetZ()*c.GetZ();
657 w=par->GetZWidth();
658 c.SetSigmaZ2((s2 + 1./12.)*w*w);
659 if (s2 != 0.) {
660 c.SetSigmaZ2(c.GetSigmaZ2()*0.169);
661 if (sec<par->GetNInnerSector()) c.SetSigmaZ2(c.GetSigmaZ2()*1.77);
662 }
663 */
664
665 c.SetSigmaY2(0.0030*0.0030);
666 c.SetSigmaZ2(0.0020*0.0020);
667 c.SetDetectorIndex(fNdet[fI]);
668
669 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
670 y/=q; z/=q;
671
672 y=(y-0.5)*fYpitchSDD;
673 y-=fHwSDD;
674 y-=fYoffSDD; //delay ?
675 if (s) y=-y;
676
677 z=(z-0.5)*fZpitchSDD;
678 z-=fHlSDD;
679
680 y=-y-fYshift[fI];
681 z= z+fZshift[fI];
682 c.SetY(y);
683 c.SetZ(z);
684
685 c.SetQ(q/20.); //to be consistent with the SSD charges
686
c391f9d9 687 if (digits) {
688 AliBin *b=&bins[s][idx[k]];
689 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
690 Int_t l0=(d->GetTracks())[0];
691 if (l0<0) {
692 b=&bins[s][idx[k]-1];
693 if (b->GetQ()>0) {
694 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
695 l0=(d->GetTracks())[0];
696 }
697 }
698 if (l0<0) {
699 b=&bins[s][idx[k]+1];
700 if (b->GetQ()>0) {
701 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
702 l0=(d->GetTracks())[0];
703 }
704 }
705 if (l0<0) {
706 b=&bins[s][idx[k]-nzBins];
707 if (b->GetQ()>0) {
708 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
709 l0=(d->GetTracks())[0];
710 }
711 }
712 if (l0<0) {
713 b=&bins[s][idx[k]+nzBins];
714 if (b->GetQ()>0) {
715 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
716 l0=(d->GetTracks())[0];
717 }
7f4044f0 718 }
7f4044f0 719
c391f9d9 720 if (l0<0) {
721 b=&bins[s][idx[k]+nzBins+1];
722 if (b->GetQ()>0) {
723 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
724 l0=(d->GetTracks())[0];
725 }
726 }
727 if (l0<0) {
728 b=&bins[s][idx[k]+nzBins-1];
729 if (b->GetQ()>0) {
730 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
731 l0=(d->GetTracks())[0];
732 }
733 }
734 if (l0<0) {
735 b=&bins[s][idx[k]-nzBins+1];
736 if (b->GetQ()>0) {
737 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
738 l0=(d->GetTracks())[0];
739 }
740 }
741 if (l0<0) {
742 b=&bins[s][idx[k]-nzBins-1];
743 if (b->GetQ()>0) {
744 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
745 l0=(d->GetTracks())[0];
746 }
747 }
7f4044f0 748
c391f9d9 749 {
750 Int_t lab[3];
751 lab[0]=(d->GetTracks())[0];
752 lab[1]=(d->GetTracks())[1];
753 lab[2]=(d->GetTracks())[2];
754 //CheckLabels(lab);
755 c.SetLabel(lab[0],0);
756 c.SetLabel(lab[1],1);
757 c.SetLabel(lab[2],2);
758 }
759 }
7f4044f0 760
761 new (cl[ncl]) AliITSclusterV2(c); ncl++;
762 }
763 }
c391f9d9 764}
765
766void AliITSclustererV2::
767FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
768 //------------------------------------------------------------
769 // Actual SDD cluster finder
770 //------------------------------------------------------------
771 Int_t kNzBins = fNzSDD + 2;
772 const Int_t kMAXBIN=kNzBins*(fNySDD+2);
773
774 AliBin *bins[2];
775 bins[0]=new AliBin[kMAXBIN];
776 bins[1]=new AliBin[kMAXBIN];
777
778 AliITSdigitSDD *d=0;
779 Int_t i, ndigits=digits->GetEntriesFast();
780 for (i=0; i<ndigits; i++) {
781 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
782 Int_t y=d->GetCoord2()+1; //y
783 Int_t z=d->GetCoord1()+1; //z
784 Int_t q=d->GetSignal();
785 if (z <= fNzSDD) {
786 bins[0][y*kNzBins+z].SetQ(q);
787 bins[0][y*kNzBins+z].SetMask(1);
788 bins[0][y*kNzBins+z].SetIndex(i);
789 } else {
790 z-=fNzSDD;
791 bins[1][y*kNzBins+z].SetQ(q);
792 bins[1][y*kNzBins+z].SetMask(1);
793 bins[1][y*kNzBins+z].SetIndex(i);
794 }
795 }
796
797 FindClustersSDD(bins, kMAXBIN, kNzBins, digits, clusters);
7f4044f0 798
799 delete[] bins[0];
800 delete[] bins[1];
801}
802
c391f9d9 803void AliITSclustererV2::FindClustersSDD(AliITSRawStream* input,
804 TClonesArray** clusters)
805{
806 //------------------------------------------------------------
807 // Actual SDD cluster finder for raw data
808 //------------------------------------------------------------
809 Int_t nClustersSDD = 0;
810 Int_t kNzBins = fNzSDD + 2;
811 Int_t kMaxBin = kNzBins * (fNySDD+2);
812 AliBin* bins[2] = {NULL, NULL};
813
814 // read raw data input stream
815 while (kTRUE) {
816 Bool_t next = input->Next();
817 if (!next || input->IsNewModule()) {
818 Int_t iModule = input->GetPrevModuleID();
819
820 // when all data from a module was read, search for clusters
821 if (bins[0]) {
822 clusters[iModule] = new TClonesArray("AliITSclusterV2");
823 fI = iModule;
824 FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
825 Int_t nClusters = clusters[iModule]->GetEntriesFast();
826 nClustersSDD += nClusters;
827 delete[] bins[0];
828 delete[] bins[1];
829 }
830
831 if (!next) break;
832 bins[0] = new AliBin[kMaxBin];
833 bins[1] = new AliBin[kMaxBin];
834 }
835
836 // fill the current digit into the bins array
837 Int_t iz = input->GetCoord1()+1;
838 Int_t side = ((iz <= fNzSDD) ? 0 : 1);
839 iz -= side*fNzSDD;
840 Int_t index = (input->GetCoord2()+1) * kNzBins + iz;
841 bins[side][index].SetQ(input->GetSignal());
842 bins[side][index].SetMask(1);
843 bins[side][index].SetIndex(index);
844 }
845
846 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
847}
848
849void AliITSclustererV2::
850FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
851 Ali1Dcluster* pos, Int_t np,
852 TClonesArray *clusters) {
853 //------------------------------------------------------------
854 // Actual SSD cluster finder
855 //------------------------------------------------------------
856 TClonesArray &cl=*clusters;
857
858 Int_t lab[4]={-2,-2,-2,-2};
859 Float_t tanp=fTanP, tann=fTanN;
860 if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
861
862 Int_t idet=fNdet[fI];
863 Int_t ncl=0;
864 for (Int_t i=0; i<np; i++) {
865 //Float_t dq_min=1.e+33;
866 Float_t ybest=1000,zbest=1000,qbest=0;
867 Float_t yp=pos[i].GetY()*fYpitchSSD;
868 for (Int_t j=0; j<nn; j++) {
869 //if (pos[i].fTracks[0] != neg[j].fTracks[0]) continue;
870 Float_t yn=neg[j].GetY()*fYpitchSSD;
871 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
872 Float_t yt=yn + tann*zt;
873 zt-=fHlSSD; yt-=fHwSSD;
874 if (TMath::Abs(yt)<fHwSSD+0.01)
875 if (TMath::Abs(zt)<fHlSSD+0.01) {
876 //if (TMath::Abs(pos[i].GetQ()-neg[j].GetQ())<dq_min) {
877 //dq_min=TMath::Abs(pos[i].GetQ()-neg[j].GetQ());
878 ybest=yt; zbest=zt;
879 qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
880
881 lab[0]=pos[i].GetLabel(0);
882 lab[1]=pos[i].GetLabel(1);
883 lab[2]=neg[i].GetLabel(0);
884 lab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
885 Float_t lp[5];
886 lp[0]=-ybest-fYshift[fI];
887 lp[1]= zbest+fZshift[fI];
888 lp[2]=0.0025*0.0025; //SigmaY2
889 lp[3]=0.110*0.110; //SigmaZ2
890 if (pos[i].GetNd()+neg[j].GetNd() > 4) {
891 lp[2]*=9;
892 lp[3]*=9;
893 }
894 lp[4]=qbest; //Q
895
896 //CheckLabels(lab);
897 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
898 }
899 }
900 /*
901 if (ybest<100) {
902 lab[3]=idet;
903 Float_t lp[5];
904 lp[0]=-ybest-fYshift[fI];
905 lp[1]= zbest+fZshift[fI];
906 lp[2]=0.002*0.002; //SigmaY2
907 lp[3]=0.080*0.080; //SigmaZ2
908 lp[4]=qbest; //Q
909 //
910 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
911 }
912 */
913 }
914}
915
7f4044f0 916void AliITSclustererV2::
917FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
918 //------------------------------------------------------------
919 // Actual SSD cluster finder
920 //------------------------------------------------------------
921 Int_t smax=digits->GetEntriesFast();
922 if (smax==0) return;
923
924 const Int_t MAX=1000;
925 Int_t np=0, nn=0;
926 Ali1Dcluster pos[MAX], neg[MAX];
927 Float_t y=0., q=0., qmax=0.;
928 Int_t lab[4]={-2,-2,-2,-2};
929
7f4044f0 930 AliITSdigitSSD *d=(AliITSdigitSSD*)digits->UncheckedAt(0);
931 q += d->GetSignal();
932 y += d->GetCoord2()*d->GetSignal();
933 qmax=d->GetSignal();
934 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
935 Int_t curr=d->GetCoord2();
936 Int_t flag=d->GetCoord1();
937 Int_t *n=&nn;
938 Ali1Dcluster *c=neg;
c391f9d9 939 Int_t nd=1;
7f4044f0 940 for (Int_t s=1; s<smax; s++) {
941 d=(AliITSdigitSSD*)digits->UncheckedAt(s);
942 Int_t strip=d->GetCoord2();
943 if ((strip-curr) > 1 || flag!=d->GetCoord1()) {
944 c[*n].SetY(y/q);
945 c[*n].SetQ(q);
946 c[*n].SetNd(nd);
947 c[*n].SetLabels(lab);
948 //Split suspiciously big cluster
949 if (nd>3) {
950 c[*n].SetY(y/q-0.5*nd);
951 c[*n].SetQ(0.5*q);
952 (*n)++;
953 if (*n==MAX) {
c630aafd 954 Error("FindClustersSSD","Too many 1D clusters !");
7f4044f0 955 return;
956 }
957 c[*n].SetY(y/q+0.5*nd);
958 c[*n].SetQ(0.5*q);
959 c[*n].SetNd(nd);
960 c[*n].SetLabels(lab);
961 }
962 (*n)++;
963 if (*n==MAX) {
c630aafd 964 Error("FindClustersSSD","Too many 1D clusters !");
7f4044f0 965 return;
966 }
967 y=q=qmax=0.;
968 nd=0;
969 lab[0]=lab[1]=lab[2]=-2;
970 if (flag!=d->GetCoord1()) { n=&np; c=pos; }
971 }
972 flag=d->GetCoord1();
973 q += d->GetSignal();
974 y += d->GetCoord2()*d->GetSignal();
975 nd++;
976 if (d->GetSignal()>qmax) {
977 qmax=d->GetSignal();
978 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
979 }
980 curr=strip;
981 }
982 c[*n].SetY(y/q);
983 c[*n].SetQ(q);
984 c[*n].SetNd(nd);
985 c[*n].SetLabels(lab);
986 //Split suspiciously big cluster
987 if (nd>3) {
988 c[*n].SetY(y/q-0.5*nd);
989 c[*n].SetQ(0.5*q);
990 (*n)++;
991 if (*n==MAX) {
c630aafd 992 Error("FindClustersSSD","Too many 1D clusters !");
7f4044f0 993 return;
994 }
995 c[*n].SetY(y/q+0.5*nd);
996 c[*n].SetQ(0.5*q);
997 c[*n].SetNd(nd);
998 c[*n].SetLabels(lab);
999 }
1000 (*n)++;
1001 if (*n==MAX) {
c630aafd 1002 Error("FindClustersSSD","Too many 1D clusters !");
7f4044f0 1003 return;
1004 }
1005
c391f9d9 1006 FindClustersSSD(neg, nn, pos, np, clusters);
1007}
7f4044f0 1008
c391f9d9 1009void AliITSclustererV2::FindClustersSSD(AliITSRawStream* input,
1010 TClonesArray** clusters)
1011{
1012 //------------------------------------------------------------
1013 // Actual SSD cluster finder for raw data
1014 //------------------------------------------------------------
1015 Int_t nClustersSSD = 0;
1016 const Int_t MAX = 1000;
1017 Ali1Dcluster clusters1D[2][MAX];
1018 Int_t nClusters[2] = {0, 0};
1019 Float_t q = 0.;
1020 Float_t y = 0.;
1021 Int_t nDigits = 0;
1022 Int_t prevStrip = -1;
1023 Int_t prevFlag = -1;
1024
1025 // read raw data input stream
1026 while (kTRUE) {
1027 Bool_t next = input->Next();
1028
1029 // check if a new cluster starts
1030 Int_t strip = input->GetCoord2();
1031 Int_t flag = input->GetCoord1();
1032 if ((!next || input->IsNewModule() ||
1033 (strip-prevStrip > 1) || (flag != prevFlag)) &&
1034 (nDigits > 0)) {
1035 if (nClusters[prevFlag] == MAX) {
1036 Error("FindClustersSSD", "Too many 1D clusters !");
1037 return;
1038 }
1039 Ali1Dcluster& cluster = clusters1D[prevFlag][nClusters[prevFlag]++];
1040 cluster.SetY(y/q);
1041 cluster.SetQ(q);
1042 cluster.SetNd(nDigits);
1043
1044 //Split suspiciously big cluster
1045 if (nDigits > 3) {
1046 cluster.SetY(y/q - 0.5*nDigits);
1047 cluster.SetQ(0.5*q);
1048 if (nClusters[prevFlag] == MAX) {
1049 Error("FindClustersSSD", "Too many 1D clusters !");
1050 return;
1051 }
1052 Ali1Dcluster& cluster2 = clusters1D[prevFlag][nClusters[prevFlag]++];
1053 cluster2.SetY(y/q + 0.5*nDigits);
1054 cluster2.SetQ(0.5*q);
1055 cluster2.SetNd(nDigits);
7f4044f0 1056 }
c391f9d9 1057 y = q = 0.;
1058 nDigits = 0;
7f4044f0 1059 }
c391f9d9 1060
1061 if (!next || input->IsNewModule()) {
1062 Int_t iModule = input->GetPrevModuleID();
1063
1064 // when all data from a module was read, search for clusters
1065 if (prevFlag >= 0) {
1066 clusters[iModule] = new TClonesArray("AliITSclusterV2");
1067 fI = iModule;
1068 FindClustersSSD(&clusters1D[0][0], nClusters[0],
1069 &clusters1D[1][0], nClusters[1], clusters[iModule]);
1070 Int_t nClusters = clusters[iModule]->GetEntriesFast();
1071 nClustersSSD += nClusters;
1072 }
1073
1074 if (!next) break;
1075 nClusters[0] = nClusters[1] = 0;
1076 y = q = 0.;
1077 nDigits = 0;
7f4044f0 1078 }
c391f9d9 1079
1080 // add digit to current cluster
1081 q += input->GetSignal();
1082 y += strip * input->GetSignal();
1083 nDigits++;
1084 prevStrip = strip;
1085 prevFlag = flag;
7f4044f0 1086 }
c391f9d9 1087
1088 Info("FindClustersSSD", "found clusters in ITS SSD: %d", nClustersSSD);
7f4044f0 1089}
1090
1091#else //V1
1092
1093#include "AliITSDetType.h"
1094
1095#include "AliITSsegmentationSPD.h"
1096#include "AliITSClusterFinderSPD.h"
1097
1098#include "AliITSresponseSDD.h"
1099#include "AliITSsegmentationSDD.h"
1100#include "AliITSClusterFinderSDD.h"
1101
1102#include "AliITSsegmentationSSD.h"
1103#include "AliITSClusterFinderSSD.h"
1104
1105
1106void AliITSclustererV2::
1107FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
1108 //------------------------------------------------------------
1109 // Actual SPD cluster finding based on AliITSClusterFinderSPD
1110 //------------------------------------------------------------
1111 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1112 static TClonesArray *points=its->RecPoints();
1113 static AliITSsegmentationSPD *seg=
1114 (AliITSsegmentationSPD *)its->DetType(0)->GetSegmentationModel();
1115 static AliITSClusterFinderSPD cf(seg, (TClonesArray*)digits, points);
1116
1117 cf.FindRawClusters(fI);
1cca57bf 1118 RecPoints2Clusters(points, fI, clusters);
7f4044f0 1119 its->ResetRecPoints();
1120
1121}
1122
1123void AliITSclustererV2::
1124FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
1125 //------------------------------------------------------------
1126 // Actual SDD cluster finding based on AliITSClusterFinderSDD
1127 //------------------------------------------------------------
1128 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1129 static TClonesArray *points=its->RecPoints();
1130 static AliITSresponseSDD *resp=
1131 (AliITSresponseSDD *)its->DetType(1)->GetResponseModel();
1132 static AliITSsegmentationSDD *seg=
1133 (AliITSsegmentationSDD *)its->DetType(1)->GetSegmentationModel();
1134 static AliITSClusterFinderSDD
1135 cf(seg,resp,(TClonesArray*)digits,its->ClustersAddress(1));
1136
1137 cf.FindRawClusters(fI);
1cca57bf 1138 Int_t nc=points->GetEntriesFast();
1139 while (nc--) { //To be consistent with the SSD cluster charges
1140 AliITSRecPoint *p=(AliITSRecPoint*)points->UncheckedAt(nc);
1141 p->SetQ(p->GetQ/12.);
1142 }
1143 RecPoints2Clusters(points, fI, clusters);
7f4044f0 1144 its->ResetClusters(1);
1145 its->ResetRecPoints();
1146
1147}
1148
1149void AliITSclustererV2::
1150FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
1151 //------------------------------------------------------------
1152 // Actual SSD cluster finding based on AliITSClusterFinderSSD
1153 //------------------------------------------------------------
1154 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1155 static TClonesArray *points=its->RecPoints();
1156 static AliITSsegmentationSSD *seg=
1157 (AliITSsegmentationSSD *)its->DetType(2)->GetSegmentationModel();
1158 static AliITSClusterFinderSSD cf(seg,(TClonesArray*)digits);
1159
1160 cf.FindRawClusters(fI);
1cca57bf 1161 RecPoints2Clusters(points, fI, clusters);
7f4044f0 1162 its->ResetRecPoints();
1163
1164}
1165
1166#endif