1 //-------------------------------------------------------------------------
2 // Implementation of the ITS clusterer V2 class
4 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
5 //-------------------------------------------------------------------------
6 //uncomment the line below for running with V1 cluster finder classes
11 #include "AliITSclustererV2.h"
12 #include "AliITSclusterV2.h"
13 #include "AliRawReader.h"
14 #include "AliITSRawStreamSPD.h"
15 #include "AliITSRawStreamSDD.h"
16 #include "AliITSRawStreamSSD.h"
20 #include <TClonesArray.h>
21 #include "AliITSgeom.h"
22 #include "AliITSdigit.h"
25 ClassImp(AliITSclustererV2)
27 extern AliRun *gAlice;
29 AliITSclustererV2::AliITSclustererV2(const AliITSgeom *geom) {
30 //------------------------------------------------------------
31 // Standard constructor
32 //------------------------------------------------------------
33 AliITSgeom *g=(AliITSgeom*)geom;
38 Int_t mmax=geom->GetIndexMax();
40 Fatal("AliITSclustererV2","Too many ITS subdetectors !");
43 for (m=0; m<mmax; m++) {
44 Int_t lay,lad,det; g->GetModuleId(m,lay,lad,det);
45 Float_t x,y,z; g->GetTrans(lay,lad,det,x,y,z);
46 Double_t rot[9]; g->GetRotMatrix(lay,lad,det,rot);
47 fYshift[m] = x*rot[0] + y*rot[1];
48 fZshift[m] = (Double_t)z;
49 fNdet[m] = (lad-1)*g->GetNdetectors(lay) + (det-1);
51 fNModules = g->GetIndexMax();
54 fLastSPD1=g->GetModuleIndex(2,1,1)-1;
55 fNySPD=256; fNzSPD=160;
57 fZ1pitchSPD=0.0425; fZ2pitchSPD=0.0625;
58 fHwSPD=0.64; fHlSPD=3.48;
59 fYSPD[0]=0.5*fYpitchSPD;
60 for (m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
62 for (m=1; m<fNzSPD; m++) {
63 Double_t dz=fZ1pitchSPD;
64 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
65 m==127 || m==128) dz=fZ2pitchSPD;
66 fZSPD[m]=fZSPD[m-1]+dz;
68 for (m=0; m<fNzSPD; m++) {
69 Double_t dz=0.5*fZ1pitchSPD;
70 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
71 m==127 || m==128) dz=0.5*fZ2pitchSPD;
76 fNySDD=256; fNzSDD=256;
79 fHwSDD=3.5085; fHlSDD=3.7632;
83 fLastSSD1=g->GetModuleIndex(6,1,1)-1;
91 Int_t AliITSclustererV2::Digits2Clusters(TTree *dTree, TTree *cTree) {
92 //------------------------------------------------------------
93 // This function creates ITS clusters
94 //------------------------------------------------------------
98 Error("Digits2Clusters","Can't get the tree with digits !");
102 TClonesArray *digitsSPD=new TClonesArray("AliITSdigitSPD",3000);
103 dTree->SetBranchAddress("ITSDigitsSPD",&digitsSPD);
104 TClonesArray *digitsSDD=new TClonesArray("AliITSdigitSDD",3000);
105 dTree->SetBranchAddress("ITSDigitsSDD",&digitsSDD);
106 TClonesArray *digitsSSD=new TClonesArray("AliITSdigitSSD",3000);
107 dTree->SetBranchAddress("ITSDigitsSSD",&digitsSSD);
109 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
110 TBranch *branch=cTree->GetBranch("Clusters");
111 if (!branch) cTree->Branch("Clusters",&clusters);
112 else branch->SetAddress(&clusters);
114 Int_t mmax=(Int_t)dTree->GetEntries();
116 for (fI=0; fI<mmax; fI++) {
119 if (digitsSPD->GetEntriesFast()!=0)
120 FindClustersSPD(digitsSPD,clusters);
121 else if(digitsSDD->GetEntriesFast()!=0)
122 FindClustersSDD(digitsSDD,clusters);
123 else if(digitsSSD->GetEntriesFast()!=0)
124 FindClustersSSD(digitsSSD,clusters);
126 ncl+=clusters->GetEntriesFast();
146 Info("Digits2Clusters","Number of found clusters : %d",ncl);
151 void AliITSclustererV2::Digits2Clusters(AliRawReader* rawReader) {
152 //------------------------------------------------------------
153 // This function creates ITS clusters from raw data
154 //------------------------------------------------------------
155 AliRunLoader* runLoader = AliRunLoader::GetRunLoader();
157 Error("Digits2Clusters", "no run loader found");
160 AliLoader* itsLoader = runLoader->GetLoader("ITSLoader");
162 Error("Digits2Clusters", "no loader for ITS found");
165 if (!itsLoader->TreeR()) itsLoader->MakeTree("R");
166 TTree* cTree = itsLoader->TreeR();
168 TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
169 cTree->Branch("Clusters",&array);
172 TClonesArray** clusters = new TClonesArray*[fNModules];
173 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
174 clusters[iModule] = NULL;
176 // one TClonesArray per module
179 AliITSRawStreamSPD inputSPD(rawReader);
180 FindClustersSPD(&inputSPD, clusters);
183 AliITSRawStreamSDD inputSDD(rawReader);
184 FindClustersSDD(&inputSDD, clusters);
187 AliITSRawStreamSSD inputSSD(rawReader);
188 FindClustersSSD(&inputSSD, clusters);
190 // write all clusters to the tree
192 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
193 array = clusters[iModule];
195 Error("Digits2Clusters", "data for module %d missing!", iModule);
196 array = new TClonesArray("AliITSclusterV2");
198 cTree->SetBranchAddress("Clusters", &array);
200 nClusters += array->GetEntriesFast();
203 itsLoader->WriteRecPoints("OVERWRITE");
207 Info("Digits2Clusters", "total number of found clusters in ITS: %d\n",
211 //**** Fast clusters *******************************
212 #include "TParticle.h"
215 #include "AliITSmodule.h"
216 #include "AliITSRecPoint.h"
217 #include "AliITSsimulationFastPoints.h"
218 #include "AliITSRecPoint.h"
220 static void CheckLabels(Int_t lab[3]) {
221 //------------------------------------------------------------
222 // Tries to find mother's labels
223 //------------------------------------------------------------
226 TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
228 while (part->P() < 0.005) {
229 Int_t m=part->GetFirstMother();
231 Info("CheckLabels","Primary momentum: %f",part->P());
234 if (part->GetStatusCode()>0) {
235 Info("CheckLabels","Primary momentum: %f",part->P());
239 part=(TParticle*)gAlice->GetMCApp()->Particle(label);
241 if (lab[1]<0) lab[1]=label;
242 else if (lab[2]<0) lab[2]=label;
243 else ;//cerr<<"CheckLabels : No empty labels !\n";
247 void AliITSclustererV2::RecPoints2Clusters
248 (const TClonesArray *points, Int_t idx, TClonesArray *clusters) {
249 //------------------------------------------------------------
250 // Conversion AliITSRecPoint -> AliITSclusterV2 for the ITS
251 // subdetector indexed by idx
252 //------------------------------------------------------------
253 TClonesArray &cl=*clusters;
254 Int_t ncl=points->GetEntriesFast();
255 for (Int_t i=0; i<ncl; i++) {
256 AliITSRecPoint *p = (AliITSRecPoint *)points->UncheckedAt(i);
258 lp[0]=-p->GetX()-fYshift[idx]; if (idx<=fLastSPD1) lp[0]*=-1; //SPD1
259 lp[1]=p->GetZ()+fZshift[idx];
260 lp[2]=p->GetSigmaX2();
261 lp[3]=p->GetSigmaZ2();
264 lab[0]=p->GetLabel(0); lab[1]=p->GetLabel(1); lab[2]=p->GetLabel(2);
267 new (cl[i]) AliITSclusterV2(lab,lp);
271 Int_t AliITSclustererV2::Hits2Clusters(TTree *hTree, TTree *cTree) {
272 //------------------------------------------------------------
273 // This function creates ITS clusters
274 //------------------------------------------------------------
276 Error("Hits2Clusters","gAlice==0 !");
280 AliITS *its = (AliITS*)gAlice->GetModule("ITS");
282 Error("Hits2Clusters","Can't find the ITS !");
285 AliITSgeom *geom=its->GetITSgeom();
286 Int_t mmax=geom->GetIndexMax();
288 its->InitModules(-1,mmax);
289 its->FillModules(hTree,0);
291 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
292 TBranch *branch=cTree->GetBranch("Clusters");
293 if (!branch) cTree->Branch("Clusters",&clusters);
294 else branch->SetAddress(&clusters);
296 static TClonesArray *points=its->RecPoints();
297 AliITSsimulationFastPoints sim;
299 for (Int_t m=0; m<mmax; m++) {
300 AliITSmodule *mod=its->GetModule(m);
301 sim.CreateFastRecPoints(mod,m,gRandom);
303 RecPoints2Clusters(points, m, clusters);
304 its->ResetRecPoints();
306 ncl+=clusters->GetEntriesFast();
311 Info("Hits2Clusters","Number of found fast clusters : %d",ncl);
320 //***********************************
324 void AliITSclustererV2::
325 FindCluster(Int_t k,Int_t maxz,AliBin *bins,Int_t &n,Int_t *idx) {
326 //------------------------------------------------------------
327 // returns an array of indices of digits belonging to the cluster
328 // (needed when the segmentation is not regular)
329 //------------------------------------------------------------
330 if (n<200) idx[n++]=bins[k].GetIndex();
333 if (bins[k-maxz].IsNotUsed()) FindCluster(k-maxz,maxz,bins,n,idx);
334 if (bins[k-1 ].IsNotUsed()) FindCluster(k-1 ,maxz,bins,n,idx);
335 if (bins[k+maxz].IsNotUsed()) FindCluster(k+maxz,maxz,bins,n,idx);
336 if (bins[k+1 ].IsNotUsed()) FindCluster(k+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 if (bins[k+maxz+1].IsNotUsed()) FindCluster(k+maxz+1,maxz,bins,n,idx);
345 void AliITSclustererV2::
346 FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
347 //------------------------------------------------------------
348 // Actual SPD cluster finder
349 //------------------------------------------------------------
350 Int_t kNzBins = fNzSPD + 2;
351 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
353 Int_t ndigits=digits->GetEntriesFast();
354 AliBin *bins=new AliBin[kMAXBIN];
358 for (k=0; k<ndigits; k++) {
359 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
360 Int_t i=d->GetCoord2()+1; //y
361 Int_t j=d->GetCoord1()+1;
362 bins[i*kNzBins+j].SetIndex(k);
363 bins[i*kNzBins+j].SetMask(1);
366 Int_t n=0; TClonesArray &cl=*clusters;
367 for (k=0; k<kMAXBIN; k++) {
368 if (!bins[k].IsNotUsed()) continue;
369 Int_t ni=0, idx[200];
370 FindCluster(k,kNzBins,bins,ni,idx);
372 Info("FindClustersSPD","Too big cluster !");
381 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
382 Int_t ymin=d->GetCoord2(),ymax=ymin;
383 Int_t zmin=d->GetCoord1(),zmax=zmin;
384 Float_t y=0.,z=0.,q=0.;
385 for (Int_t l=0; l<ni; l++) {
386 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[l]);
388 if (ymin > d->GetCoord2()) ymin=d->GetCoord2();
389 if (ymax < d->GetCoord2()) ymax=d->GetCoord2();
390 if (zmin > d->GetCoord1()) zmin=d->GetCoord1();
391 if (zmax < d->GetCoord1()) zmax=d->GetCoord1();
393 Int_t lab0=(d->GetTracks())[0];
397 } else if (lab[1]<0) {
398 if (lab0!=lab[0]) lab[1]=lab0;
399 } else if (lab[2]<0) {
401 if (lab0!=lab[1]) lab[2]=lab0;
404 Float_t qq=d->GetSignal();
405 y+=qq*fYSPD[d->GetCoord2()]; z+=qq*fZSPD[d->GetCoord1()]; q+=qq;
408 y-=fHwSPD; z-=fHlSPD;
411 lp[0]=-y-fYshift[fI]; if (fI<=fLastSPD1) lp[0]=-lp[0];
412 lp[1]= z+fZshift[fI];
413 lp[2]= fYpitchSPD*fYpitchSPD/12.;
414 lp[3]= fZ1pitchSPD*fZ1pitchSPD/12.;
416 lp[4]= (zmax-zmin+1)*100 + (ymax-ymin+1);
419 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
420 new (cl[n]) AliITSclusterV2(lab,lp); n++;
426 void AliITSclustererV2::FindClustersSPD(AliITSRawStream* input,
427 TClonesArray** clusters)
429 //------------------------------------------------------------
430 // Actual SPD cluster finder for raw data
431 //------------------------------------------------------------
433 Int_t nClustersSPD = 0;
434 Int_t kNzBins = fNzSPD + 2;
435 Int_t kNyBins = fNySPD + 2;
436 Int_t kMaxBin = kNzBins * kNyBins;
439 // read raw data input stream
441 Bool_t next = input->Next();
442 if (!next || input->IsNewModule()) {
443 Int_t iModule = input->GetPrevModuleID();
445 // when all data from a module was read, search for clusters
447 clusters[iModule] = new TClonesArray("AliITSclusterV2");
450 for (Int_t iBin = 0; iBin < kMaxBin; iBin++) {
451 if (bins[iBin].IsUsed()) continue;
454 FindCluster(iBin, kNzBins, bins, nBins, idxBins);
456 Error("FindClustersSPD", "SPD: Too big cluster !\n");
464 // label[3] = iModule;
465 label[3] = fNdet[iModule];
467 Int_t ymin = (idxBins[0] / kNzBins) - 1;
469 Int_t zmin = (idxBins[0] % kNzBins) - 1;
474 for (Int_t idx = 0; idx < nBins; idx++) {
475 Int_t iy = (idxBins[idx] / kNzBins) - 1;
476 Int_t iz = (idxBins[idx] % kNzBins) - 1;
477 if (ymin > iy) ymin = iy;
478 if (ymax < iy) ymax = iy;
479 if (zmin > iz) zmin = iz;
480 if (zmax < iz) zmax = iz;
482 Float_t qBin = bins[idxBins[idx]].GetQ();
483 y += qBin * fYSPD[iy];
484 z += qBin * fZSPD[iz];
492 Float_t hit[5]; // y, z, sigma(y)^2, sigma(z)^2, charge
493 hit[0] = -y-fYshift[iModule];
494 if (iModule <= fLastSPD1) hit[0] = -hit[0];
495 hit[1] = z+fZshift[iModule];
496 hit[2] = fYpitchSPD*fYpitchSPD/12.;
497 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
499 hit[4] = (zmax-zmin+1)*100 + (ymax-ymin+1);
501 //CheckLabels(label);
502 new (clusters[iModule]->AddrAt(nClusters))
503 AliITSclusterV2(label, hit);
507 nClustersSPD += nClusters;
512 bins = new AliBin[kMaxBin];
515 // fill the current digit into the bins array
516 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
517 bins[index].SetIndex(index);
518 bins[index].SetMask(1);
522 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
526 Bool_t AliITSclustererV2::IsMaximum(Int_t k,Int_t max,const AliBin *bins) {
527 //------------------------------------------------------------
528 //is this a local maximum ?
529 //------------------------------------------------------------
530 UShort_t q=bins[k].GetQ();
531 if (q==1023) return kFALSE;
532 if (bins[k-max].GetQ() > q) return kFALSE;
533 if (bins[k-1 ].GetQ() > q) return kFALSE;
534 if (bins[k+max].GetQ() > q) return kFALSE;
535 if (bins[k+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 if (bins[k-max+1].GetQ() > q) return kFALSE;
543 void AliITSclustererV2::
544 FindPeaks(Int_t k,Int_t max,AliBin *b,Int_t *idx,UInt_t *msk,Int_t& n) {
545 //------------------------------------------------------------
547 //------------------------------------------------------------
549 if (IsMaximum(k,max,b)) {
550 idx[n]=k; msk[n]=(2<<n);
554 if (b[k-max].GetMask()&1) FindPeaks(k-max,max,b,idx,msk,n);
555 if (b[k-1 ].GetMask()&1) FindPeaks(k-1 ,max,b,idx,msk,n);
556 if (b[k+max].GetMask()&1) FindPeaks(k+max,max,b,idx,msk,n);
557 if (b[k+1 ].GetMask()&1) FindPeaks(k+1 ,max,b,idx,msk,n);
560 void AliITSclustererV2::
561 MarkPeak(Int_t k, Int_t max, AliBin *bins, UInt_t m) {
562 //------------------------------------------------------------
564 //------------------------------------------------------------
565 UShort_t q=bins[k].GetQ();
567 bins[k].SetMask(bins[k].GetMask()|m);
569 if (bins[k-max].GetQ() <= q)
570 if ((bins[k-max].GetMask()&m) == 0) MarkPeak(k-max,max,bins,m);
571 if (bins[k-1 ].GetQ() <= q)
572 if ((bins[k-1 ].GetMask()&m) == 0) MarkPeak(k-1 ,max,bins,m);
573 if (bins[k+max].GetQ() <= q)
574 if ((bins[k+max].GetMask()&m) == 0) MarkPeak(k+max,max,bins,m);
575 if (bins[k+1 ].GetQ() <= q)
576 if ((bins[k+1 ].GetMask()&m) == 0) MarkPeak(k+1 ,max,bins,m);
579 void AliITSclustererV2::
580 MakeCluster(Int_t k,Int_t max,AliBin *bins,UInt_t m,AliITSclusterV2 &c) {
581 //------------------------------------------------------------
582 //make cluster using digits of this peak
583 //------------------------------------------------------------
584 Float_t q=(Float_t)bins[k].GetQ();
585 Int_t i=k/max, j=k-i*max;
588 c.SetY(c.GetY()+i*q);
589 c.SetZ(c.GetZ()+j*q);
590 c.SetSigmaY2(c.GetSigmaY2()+i*i*q);
591 c.SetSigmaZ2(c.GetSigmaZ2()+j*j*q);
593 bins[k].SetMask(0xFFFFFFFE);
595 if (bins[k-max].GetMask() == m) MakeCluster(k-max,max,bins,m,c);
596 if (bins[k-1 ].GetMask() == m) MakeCluster(k-1 ,max,bins,m,c);
597 if (bins[k+max].GetMask() == m) MakeCluster(k+max,max,bins,m,c);
598 if (bins[k+1 ].GetMask() == m) MakeCluster(k+1 ,max,bins,m,c);
601 void AliITSclustererV2::
602 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
603 const TClonesArray *digits, TClonesArray *clusters) {
604 //------------------------------------------------------------
605 // Actual SDD cluster finder
606 //------------------------------------------------------------
607 Int_t ncl=0; TClonesArray &cl=*clusters;
608 for (Int_t s=0; s<2; s++)
609 for (Int_t i=0; i<nMaxBin; i++) {
610 if (bins[s][i].IsUsed()) continue;
611 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
612 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
614 if (npeaks>30) continue;
617 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
618 if (idx[k] < 0) continue; //this peak is already removed
619 for (l=k+1; l<npeaks; l++) {
620 if (idx[l] < 0) continue; //this peak is already removed
621 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
622 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
623 Int_t di=TMath::Abs(ki - li);
624 Int_t dj=TMath::Abs(kj - lj);
625 if (di>1 || dj>1) continue;
626 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
637 for (k=0; k<npeaks; k++) {
638 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
641 for (k=0; k<npeaks; k++) {
642 if (idx[k] < 0) continue; //removed peak
644 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
646 //if (c.GetQ() < 200) continue; //noise cluster
649 Float_t s2 = c.GetSigmaY2()/c.GetQ() - c.GetY()*c.GetY();
650 Float_t w=par->GetPadPitchWidth(sec);
651 c.SetSigmaY2((s2 + 1./12.)*w*w);
653 c.SetSigmaY2(c.GetSigmaY2()*0.108);
654 if (sec<par->GetNInnerSector()) c.SetSigmaY2(c.GetSigmaY2()*2.07);
657 s2 = c.GetSigmaZ2()/c.GetQ() - c.GetZ()*c.GetZ();
659 c.SetSigmaZ2((s2 + 1./12.)*w*w);
661 c.SetSigmaZ2(c.GetSigmaZ2()*0.169);
662 if (sec<par->GetNInnerSector()) c.SetSigmaZ2(c.GetSigmaZ2()*1.77);
666 c.SetSigmaY2(0.0030*0.0030);
667 c.SetSigmaZ2(0.0020*0.0020);
668 c.SetDetectorIndex(fNdet[fI]);
670 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
673 y=(y-0.5)*fYpitchSDD;
675 y-=fYoffSDD; //delay ?
678 z=(z-0.5)*fZpitchSDD;
686 c.SetQ(q/20.); //to be consistent with the SSD charges
689 AliBin *b=&bins[s][idx[k]];
690 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
691 Int_t l0=(d->GetTracks())[0];
693 b=&bins[s][idx[k]-1];
695 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
696 l0=(d->GetTracks())[0];
700 b=&bins[s][idx[k]+1];
702 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
703 l0=(d->GetTracks())[0];
707 b=&bins[s][idx[k]-nzBins];
709 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
710 l0=(d->GetTracks())[0];
714 b=&bins[s][idx[k]+nzBins];
716 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
717 l0=(d->GetTracks())[0];
722 b=&bins[s][idx[k]+nzBins+1];
724 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
725 l0=(d->GetTracks())[0];
729 b=&bins[s][idx[k]+nzBins-1];
731 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
732 l0=(d->GetTracks())[0];
736 b=&bins[s][idx[k]-nzBins+1];
738 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
739 l0=(d->GetTracks())[0];
743 b=&bins[s][idx[k]-nzBins-1];
745 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
746 l0=(d->GetTracks())[0];
752 lab[0]=(d->GetTracks())[0];
753 lab[1]=(d->GetTracks())[1];
754 lab[2]=(d->GetTracks())[2];
756 c.SetLabel(lab[0],0);
757 c.SetLabel(lab[1],1);
758 c.SetLabel(lab[2],2);
762 new (cl[ncl]) AliITSclusterV2(c); ncl++;
767 void AliITSclustererV2::
768 FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
769 //------------------------------------------------------------
770 // Actual SDD cluster finder
771 //------------------------------------------------------------
772 Int_t kNzBins = fNzSDD + 2;
773 const Int_t kMAXBIN=kNzBins*(fNySDD+2);
776 bins[0]=new AliBin[kMAXBIN];
777 bins[1]=new AliBin[kMAXBIN];
780 Int_t i, ndigits=digits->GetEntriesFast();
781 for (i=0; i<ndigits; i++) {
782 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
783 Int_t y=d->GetCoord2()+1; //y
784 Int_t z=d->GetCoord1()+1; //z
785 Int_t q=d->GetSignal();
787 bins[0][y*kNzBins+z].SetQ(q);
788 bins[0][y*kNzBins+z].SetMask(1);
789 bins[0][y*kNzBins+z].SetIndex(i);
792 bins[1][y*kNzBins+z].SetQ(q);
793 bins[1][y*kNzBins+z].SetMask(1);
794 bins[1][y*kNzBins+z].SetIndex(i);
798 FindClustersSDD(bins, kMAXBIN, kNzBins, digits, clusters);
804 void AliITSclustererV2::FindClustersSDD(AliITSRawStream* input,
805 TClonesArray** clusters)
807 //------------------------------------------------------------
808 // Actual SDD cluster finder for raw data
809 //------------------------------------------------------------
810 Int_t nClustersSDD = 0;
811 Int_t kNzBins = fNzSDD + 2;
812 Int_t kMaxBin = kNzBins * (fNySDD+2);
813 AliBin* bins[2] = {NULL, NULL};
815 // read raw data input stream
817 Bool_t next = input->Next();
818 if (!next || input->IsNewModule()) {
819 Int_t iModule = input->GetPrevModuleID();
821 // when all data from a module was read, search for clusters
823 clusters[iModule] = new TClonesArray("AliITSclusterV2");
825 FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
826 Int_t nClusters = clusters[iModule]->GetEntriesFast();
827 nClustersSDD += nClusters;
833 bins[0] = new AliBin[kMaxBin];
834 bins[1] = new AliBin[kMaxBin];
837 // fill the current digit into the bins array
838 Int_t iz = input->GetCoord1()+1;
839 Int_t side = ((iz <= fNzSDD) ? 0 : 1);
841 Int_t index = (input->GetCoord2()+1) * kNzBins + iz;
842 bins[side][index].SetQ(input->GetSignal());
843 bins[side][index].SetMask(1);
844 bins[side][index].SetIndex(index);
847 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
850 void AliITSclustererV2::
851 FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
852 Ali1Dcluster* pos, Int_t np,
853 TClonesArray *clusters) {
854 //------------------------------------------------------------
855 // Actual SSD cluster finder
856 //------------------------------------------------------------
857 TClonesArray &cl=*clusters;
859 Int_t lab[4]={-2,-2,-2,-2};
860 Float_t tanp=fTanP, tann=fTanN;
861 if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
863 Int_t idet=fNdet[fI];
865 for (Int_t i=0; i<np; i++) {
866 //Float_t dq_min=1.e+33;
867 Float_t ybest=1000,zbest=1000,qbest=0;
868 Float_t yp=pos[i].GetY()*fYpitchSSD;
869 for (Int_t j=0; j<nn; j++) {
870 //if (pos[i].fTracks[0] != neg[j].fTracks[0]) continue;
871 Float_t yn=neg[j].GetY()*fYpitchSSD;
872 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
873 Float_t yt=yn + tann*zt;
874 zt-=fHlSSD; yt-=fHwSSD;
875 if (TMath::Abs(yt)<fHwSSD+0.01)
876 if (TMath::Abs(zt)<fHlSSD+0.01) {
877 //if (TMath::Abs(pos[i].GetQ()-neg[j].GetQ())<dq_min) {
878 //dq_min=TMath::Abs(pos[i].GetQ()-neg[j].GetQ());
880 qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
882 lab[0]=pos[i].GetLabel(0);
883 lab[1]=pos[i].GetLabel(1);
884 lab[2]=neg[i].GetLabel(0);
885 lab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
887 lp[0]=-ybest-fYshift[fI];
888 lp[1]= zbest+fZshift[fI];
889 lp[2]=0.0025*0.0025; //SigmaY2
890 lp[3]=0.110*0.110; //SigmaZ2
891 if (pos[i].GetNd()+neg[j].GetNd() > 4) {
898 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
905 lp[0]=-ybest-fYshift[fI];
906 lp[1]= zbest+fZshift[fI];
907 lp[2]=0.002*0.002; //SigmaY2
908 lp[3]=0.080*0.080; //SigmaZ2
911 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
917 void AliITSclustererV2::
918 FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
919 //------------------------------------------------------------
920 // Actual SSD cluster finder
921 //------------------------------------------------------------
922 Int_t smax=digits->GetEntriesFast();
925 const Int_t MAX=1000;
927 Ali1Dcluster pos[MAX], neg[MAX];
928 Float_t y=0., q=0., qmax=0.;
929 Int_t lab[4]={-2,-2,-2,-2};
931 AliITSdigitSSD *d=(AliITSdigitSSD*)digits->UncheckedAt(0);
933 y += d->GetCoord2()*d->GetSignal();
935 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
936 Int_t curr=d->GetCoord2();
937 Int_t flag=d->GetCoord1();
941 for (Int_t s=1; s<smax; s++) {
942 d=(AliITSdigitSSD*)digits->UncheckedAt(s);
943 Int_t strip=d->GetCoord2();
944 if ((strip-curr) > 1 || flag!=d->GetCoord1()) {
948 c[*n].SetLabels(lab);
949 //Split suspiciously big cluster
951 c[*n].SetY(y/q-0.5*nd);
955 Error("FindClustersSSD","Too many 1D clusters !");
958 c[*n].SetY(y/q+0.5*nd);
961 c[*n].SetLabels(lab);
965 Error("FindClustersSSD","Too many 1D clusters !");
970 lab[0]=lab[1]=lab[2]=-2;
971 if (flag!=d->GetCoord1()) { n=&np; c=pos; }
975 y += d->GetCoord2()*d->GetSignal();
977 if (d->GetSignal()>qmax) {
979 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
986 c[*n].SetLabels(lab);
987 //Split suspiciously big cluster
989 c[*n].SetY(y/q-0.5*nd);
993 Error("FindClustersSSD","Too many 1D clusters !");
996 c[*n].SetY(y/q+0.5*nd);
999 c[*n].SetLabels(lab);
1003 Error("FindClustersSSD","Too many 1D clusters !");
1007 FindClustersSSD(neg, nn, pos, np, clusters);
1010 void AliITSclustererV2::FindClustersSSD(AliITSRawStream* input,
1011 TClonesArray** clusters)
1013 //------------------------------------------------------------
1014 // Actual SSD cluster finder for raw data
1015 //------------------------------------------------------------
1016 Int_t nClustersSSD = 0;
1017 const Int_t MAX = 1000;
1018 Ali1Dcluster clusters1D[2][MAX];
1019 Int_t nClusters[2] = {0, 0};
1023 Int_t prevStrip = -1;
1024 Int_t prevFlag = -1;
1026 // read raw data input stream
1028 Bool_t next = input->Next();
1030 // check if a new cluster starts
1031 Int_t strip = input->GetCoord2();
1032 Int_t flag = input->GetCoord1();
1033 if ((!next || input->IsNewModule() ||
1034 (strip-prevStrip > 1) || (flag != prevFlag)) &&
1036 if (nClusters[prevFlag] == MAX) {
1037 Error("FindClustersSSD", "Too many 1D clusters !");
1040 Ali1Dcluster& cluster = clusters1D[prevFlag][nClusters[prevFlag]++];
1043 cluster.SetNd(nDigits);
1045 //Split suspiciously big cluster
1047 cluster.SetY(y/q - 0.5*nDigits);
1048 cluster.SetQ(0.5*q);
1049 if (nClusters[prevFlag] == MAX) {
1050 Error("FindClustersSSD", "Too many 1D clusters !");
1053 Ali1Dcluster& cluster2 = clusters1D[prevFlag][nClusters[prevFlag]++];
1054 cluster2.SetY(y/q + 0.5*nDigits);
1055 cluster2.SetQ(0.5*q);
1056 cluster2.SetNd(nDigits);
1062 if (!next || input->IsNewModule()) {
1063 Int_t iModule = input->GetPrevModuleID();
1065 // when all data from a module was read, search for clusters
1066 if (prevFlag >= 0) {
1067 clusters[iModule] = new TClonesArray("AliITSclusterV2");
1069 FindClustersSSD(&clusters1D[0][0], nClusters[0],
1070 &clusters1D[1][0], nClusters[1], clusters[iModule]);
1071 Int_t nClusters = clusters[iModule]->GetEntriesFast();
1072 nClustersSSD += nClusters;
1076 nClusters[0] = nClusters[1] = 0;
1081 // add digit to current cluster
1082 q += input->GetSignal();
1083 y += strip * input->GetSignal();
1089 Info("FindClustersSSD", "found clusters in ITS SSD: %d", nClustersSSD);
1094 #include "AliITSDetType.h"
1096 #include "AliITSsegmentationSPD.h"
1097 #include "AliITSClusterFinderSPD.h"
1099 #include "AliITSresponseSDD.h"
1100 #include "AliITSsegmentationSDD.h"
1101 #include "AliITSClusterFinderSDD.h"
1103 #include "AliITSsegmentationSSD.h"
1104 #include "AliITSClusterFinderSSD.h"
1107 void AliITSclustererV2::
1108 FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
1109 //------------------------------------------------------------
1110 // Actual SPD cluster finding based on AliITSClusterFinderSPD
1111 //------------------------------------------------------------
1112 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1113 static TClonesArray *points=its->RecPoints();
1114 static AliITSsegmentationSPD *seg=
1115 (AliITSsegmentationSPD *)its->DetType(0)->GetSegmentationModel();
1116 static AliITSClusterFinderSPD cf(seg, (TClonesArray*)digits, points);
1118 cf.FindRawClusters(fI);
1119 RecPoints2Clusters(points, fI, clusters);
1120 its->ResetRecPoints();
1124 void AliITSclustererV2::
1125 FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
1126 //------------------------------------------------------------
1127 // Actual SDD cluster finding based on AliITSClusterFinderSDD
1128 //------------------------------------------------------------
1129 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1130 static TClonesArray *points=its->RecPoints();
1131 static AliITSresponseSDD *resp=
1132 (AliITSresponseSDD *)its->DetType(1)->GetResponseModel();
1133 static AliITSsegmentationSDD *seg=
1134 (AliITSsegmentationSDD *)its->DetType(1)->GetSegmentationModel();
1135 static AliITSClusterFinderSDD
1136 cf(seg,resp,(TClonesArray*)digits,its->ClustersAddress(1));
1138 cf.FindRawClusters(fI);
1139 Int_t nc=points->GetEntriesFast();
1140 while (nc--) { //To be consistent with the SSD cluster charges
1141 AliITSRecPoint *p=(AliITSRecPoint*)points->UncheckedAt(nc);
1142 p->SetQ(p->GetQ/12.);
1144 RecPoints2Clusters(points, fI, clusters);
1145 its->ResetClusters(1);
1146 its->ResetRecPoints();
1150 void AliITSclustererV2::
1151 FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
1152 //------------------------------------------------------------
1153 // Actual SSD cluster finding based on AliITSClusterFinderSSD
1154 //------------------------------------------------------------
1155 static AliITS *its=(AliITS*)gAlice->GetModule("ITS");
1156 static TClonesArray *points=its->RecPoints();
1157 static AliITSsegmentationSSD *seg=
1158 (AliITSsegmentationSSD *)its->DetType(2)->GetSegmentationModel();
1159 static AliITSClusterFinderSSD cf(seg,(TClonesArray*)digits);
1161 cf.FindRawClusters(fI);
1162 RecPoints2Clusters(points, fI, clusters);
1163 its->ResetRecPoints();