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