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"
24 ClassImp(AliITSclustererV2)
26 extern AliRun *gAlice;
28 AliITSclustererV2::AliITSclustererV2(const AliITSgeom *geom) {
29 //------------------------------------------------------------
30 // Standard constructor
31 //------------------------------------------------------------
32 AliITSgeom *g=(AliITSgeom*)geom;
37 Int_t mmax=geom->GetIndexMax();
39 Fatal("AliITSclustererV2","Too many ITS subdetectors !");
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);
50 fNModules = g->GetIndexMax();
53 fLastSPD1=g->GetModuleIndex(2,1,1)-1;
54 fNySPD=256; fNzSPD=160;
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;
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;
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;
75 fNySDD=256; fNzSDD=256;
78 fHwSDD=3.5085; fHlSDD=3.7632;
82 fLastSSD1=g->GetModuleIndex(6,1,1)-1;
90 Int_t AliITSclustererV2::Digits2Clusters(TTree *dTree, TTree *cTree) {
91 //------------------------------------------------------------
92 // This function creates ITS clusters
93 //------------------------------------------------------------
97 Error("Digits2Clusters","Can't get the tree with digits !");
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);
108 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
109 TBranch *branch=cTree->GetBranch("Clusters");
110 if (!branch) cTree->Branch("Clusters",&clusters);
111 else branch->SetAddress(&clusters);
113 Int_t mmax=(Int_t)dTree->GetEntries();
115 for (fI=0; fI<mmax; fI++) {
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);
125 ncl+=clusters->GetEntriesFast();
145 Info("Digits2Clusters","Number of found clusters : %d",ncl);
150 void AliITSclustererV2::Digits2Clusters(AliRawReader* rawReader) {
151 //------------------------------------------------------------
152 // This function creates ITS clusters from raw data
153 //------------------------------------------------------------
154 AliRunLoader* runLoader = AliRunLoader::GetRunLoader();
156 Error("Digits2Clusters", "no run loader found");
159 AliLoader* itsLoader = runLoader->GetLoader("ITSLoader");
161 Error("Digits2Clusters", "no loader for ITS found");
164 if (!itsLoader->TreeR()) itsLoader->MakeTree("R");
165 TTree* cTree = itsLoader->TreeR();
167 TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
168 cTree->Branch("Clusters",&array);
171 TClonesArray** clusters = new TClonesArray*[fNModules];
172 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
173 clusters[iModule] = NULL;
175 // one TClonesArray per module
178 AliITSRawStreamSPD inputSPD(rawReader);
179 FindClustersSPD(&inputSPD, clusters);
182 AliITSRawStreamSDD inputSDD(rawReader);
183 FindClustersSDD(&inputSDD, clusters);
186 AliITSRawStreamSSD inputSSD(rawReader);
187 FindClustersSSD(&inputSSD, clusters);
189 // write all clusters to the tree
191 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
192 array = clusters[iModule];
194 Error("Digits2Clusters", "data for module %d missing!", iModule);
195 array = new TClonesArray("AliITSclusterV2");
197 cTree->SetBranchAddress("Clusters", &array);
199 nClusters += array->GetEntriesFast();
202 itsLoader->WriteRecPoints("OVERWRITE");
206 Info("Digits2Clusters", "total number of found clusters in ITS: %d\n",
210 //**** Fast clusters *******************************
211 #include "TParticle.h"
214 #include "AliITSmodule.h"
215 #include "AliITSRecPoint.h"
216 #include "AliITSsimulationFastPoints.h"
217 #include "AliITSRecPoint.h"
219 static void CheckLabels(Int_t lab[3]) {
220 //------------------------------------------------------------
221 // Tries to find mother's labels
222 //------------------------------------------------------------
225 TParticle *part=(TParticle*)gAlice->Particle(label);
227 while (part->P() < 0.005) {
228 Int_t m=part->GetFirstMother();
230 Info("CheckLabels","Primary momentum: %f",part->P());
233 if (part->GetStatusCode()>0) {
234 Info("CheckLabels","Primary momentum: %f",part->P());
238 part=(TParticle*)gAlice->Particle(label);
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";
246 void AliITSclustererV2::RecPoints2Clusters
247 (const TClonesArray *points, Int_t idx, TClonesArray *clusters) {
248 //------------------------------------------------------------
249 // Conversion AliITSRecPoint -> AliITSclusterV2 for the ITS
250 // subdetector indexed by idx
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);
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();
263 lab[0]=p->GetLabel(0); lab[1]=p->GetLabel(1); lab[2]=p->GetLabel(2);
266 new (cl[i]) AliITSclusterV2(lab,lp);
270 Int_t AliITSclustererV2::Hits2Clusters(TTree *hTree, TTree *cTree) {
271 //------------------------------------------------------------
272 // This function creates ITS clusters
273 //------------------------------------------------------------
275 Error("Hits2Clusters","gAlice==0 !");
279 AliITS *its = (AliITS*)gAlice->GetModule("ITS");
281 Error("Hits2Clusters","Can't find the ITS !");
284 AliITSgeom *geom=its->GetITSgeom();
285 Int_t mmax=geom->GetIndexMax();
287 its->InitModules(-1,mmax);
288 its->FillModules(hTree,0);
290 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
291 TBranch *branch=cTree->GetBranch("Clusters");
292 if (!branch) cTree->Branch("Clusters",&clusters);
293 else branch->SetAddress(&clusters);
295 static TClonesArray *points=its->RecPoints();
296 AliITSsimulationFastPoints sim;
298 for (Int_t m=0; m<mmax; m++) {
299 AliITSmodule *mod=its->GetModule(m);
300 sim.CreateFastRecPoints(mod,m,gRandom);
302 RecPoints2Clusters(points, m, clusters);
303 its->ResetRecPoints();
305 ncl+=clusters->GetEntriesFast();
310 Info("Hits2Clusters","Number of found fast clusters : %d",ncl);
319 //***********************************
323 void AliITSclustererV2::
324 FindCluster(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();
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);
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);
344 void AliITSclustererV2::
345 FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
346 //------------------------------------------------------------
347 // Actual SPD cluster finder
348 //------------------------------------------------------------
349 Int_t kNzBins = fNzSPD + 2;
350 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
352 Int_t ndigits=digits->GetEntriesFast();
353 AliBin *bins=new AliBin[kMAXBIN];
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;
361 bins[i*kNzBins+j].SetIndex(k);
362 bins[i*kNzBins+j].SetMask(1);
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];
369 FindCluster(k,kNzBins,bins,ni,idx);
371 Info("FindClustersSPD","Too big cluster !");
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]);
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();
392 Int_t lab0=(d->GetTracks())[0];
396 } else if (lab[1]<0) {
397 if (lab0!=lab[0]) lab[1]=lab0;
398 } else if (lab[2]<0) {
400 if (lab0!=lab[1]) lab[2]=lab0;
403 Float_t qq=d->GetSignal();
404 y+=qq*fYSPD[d->GetCoord2()]; z+=qq*fZSPD[d->GetCoord1()]; q+=qq;
407 y-=fHwSPD; z-=fHlSPD;
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.;
415 lp[4]= (zmax-zmin+1)*100 + (ymax-ymin+1);
418 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
419 new (cl[n]) AliITSclusterV2(lab,lp); n++;
425 void AliITSclustererV2::FindClustersSPD(AliITSRawStream* input,
426 TClonesArray** clusters)
428 //------------------------------------------------------------
429 // Actual SPD cluster finder for raw data
430 //------------------------------------------------------------
432 Int_t nClustersSPD = 0;
433 Int_t kNzBins = fNzSPD + 2;
434 Int_t kNyBins = fNySPD + 2;
435 Int_t kMaxBin = kNzBins * kNyBins;
438 // read raw data input stream
440 Bool_t next = input->Next();
441 if (!next || input->IsNewModule()) {
442 Int_t iModule = input->GetPrevModuleID();
444 // when all data from a module was read, search for clusters
446 clusters[iModule] = new TClonesArray("AliITSclusterV2");
449 for (Int_t iBin = 0; iBin < kMaxBin; iBin++) {
450 if (bins[iBin].IsUsed()) continue;
453 FindCluster(iBin, kNzBins, bins, nBins, idxBins);
455 Error("FindClustersSPD", "SPD: Too big cluster !\n");
463 // label[3] = iModule;
464 label[3] = fNdet[iModule];
466 Int_t ymin = (idxBins[0] / kNzBins) - 1;
468 Int_t zmin = (idxBins[0] % kNzBins) - 1;
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;
481 Float_t qBin = bins[idxBins[idx]].GetQ();
482 y += qBin * fYSPD[iy];
483 z += qBin * fZSPD[iz];
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.;
498 hit[4] = (zmax-zmin+1)*100 + (ymax-ymin+1);
500 //CheckLabels(label);
501 new (clusters[iModule]->AddrAt(nClusters))
502 AliITSclusterV2(label, hit);
506 nClustersSPD += nClusters;
511 bins = new AliBin[kMaxBin];
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);
521 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
525 Bool_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;
542 void AliITSclustererV2::
543 FindPeaks(Int_t k,Int_t max,AliBin *b,Int_t *idx,UInt_t *msk,Int_t& n) {
544 //------------------------------------------------------------
546 //------------------------------------------------------------
548 if (IsMaximum(k,max,b)) {
549 idx[n]=k; msk[n]=(2<<n);
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);
559 void AliITSclustererV2::
560 MarkPeak(Int_t k, Int_t max, AliBin *bins, UInt_t m) {
561 //------------------------------------------------------------
563 //------------------------------------------------------------
564 UShort_t q=bins[k].GetQ();
566 bins[k].SetMask(bins[k].GetMask()|m);
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);
578 void AliITSclustererV2::
579 MakeCluster(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;
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);
592 bins[k].SetMask(0xFFFFFFFE);
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);
600 void AliITSclustererV2::
601 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
602 const TClonesArray *digits, TClonesArray *clusters) {
603 //------------------------------------------------------------
604 // Actual SDD cluster finder
605 //------------------------------------------------------------
606 Int_t ncl=0; TClonesArray &cl=*clusters;
607 for (Int_t s=0; s<2; s++)
608 for (Int_t i=0; i<nMaxBin; i++) {
609 if (bins[s][i].IsUsed()) continue;
610 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
611 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
613 if (npeaks>30) continue;
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
620 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
621 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
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()) {
636 for (k=0; k<npeaks; k++) {
637 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
640 for (k=0; k<npeaks; k++) {
641 if (idx[k] < 0) continue; //removed peak
643 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
645 //if (c.GetQ() < 200) continue; //noise cluster
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);
652 c.SetSigmaY2(c.GetSigmaY2()*0.108);
653 if (sec<par->GetNInnerSector()) c.SetSigmaY2(c.GetSigmaY2()*2.07);
656 s2 = c.GetSigmaZ2()/c.GetQ() - c.GetZ()*c.GetZ();
658 c.SetSigmaZ2((s2 + 1./12.)*w*w);
660 c.SetSigmaZ2(c.GetSigmaZ2()*0.169);
661 if (sec<par->GetNInnerSector()) c.SetSigmaZ2(c.GetSigmaZ2()*1.77);
665 c.SetSigmaY2(0.0030*0.0030);
666 c.SetSigmaZ2(0.0020*0.0020);
667 c.SetDetectorIndex(fNdet[fI]);
669 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
672 y=(y-0.5)*fYpitchSDD;
674 y-=fYoffSDD; //delay ?
677 z=(z-0.5)*fZpitchSDD;
685 c.SetQ(q/20.); //to be consistent with the SSD charges
688 AliBin *b=&bins[s][idx[k]];
689 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
690 Int_t l0=(d->GetTracks())[0];
692 b=&bins[s][idx[k]-1];
694 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
695 l0=(d->GetTracks())[0];
699 b=&bins[s][idx[k]+1];
701 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
702 l0=(d->GetTracks())[0];
706 b=&bins[s][idx[k]-nzBins];
708 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
709 l0=(d->GetTracks())[0];
713 b=&bins[s][idx[k]+nzBins];
715 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
716 l0=(d->GetTracks())[0];
721 b=&bins[s][idx[k]+nzBins+1];
723 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
724 l0=(d->GetTracks())[0];
728 b=&bins[s][idx[k]+nzBins-1];
730 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
731 l0=(d->GetTracks())[0];
735 b=&bins[s][idx[k]-nzBins+1];
737 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
738 l0=(d->GetTracks())[0];
742 b=&bins[s][idx[k]-nzBins-1];
744 d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
745 l0=(d->GetTracks())[0];
751 lab[0]=(d->GetTracks())[0];
752 lab[1]=(d->GetTracks())[1];
753 lab[2]=(d->GetTracks())[2];
755 c.SetLabel(lab[0],0);
756 c.SetLabel(lab[1],1);
757 c.SetLabel(lab[2],2);
761 new (cl[ncl]) AliITSclusterV2(c); ncl++;
766 void AliITSclustererV2::
767 FindClustersSDD(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);
775 bins[0]=new AliBin[kMAXBIN];
776 bins[1]=new AliBin[kMAXBIN];
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();
786 bins[0][y*kNzBins+z].SetQ(q);
787 bins[0][y*kNzBins+z].SetMask(1);
788 bins[0][y*kNzBins+z].SetIndex(i);
791 bins[1][y*kNzBins+z].SetQ(q);
792 bins[1][y*kNzBins+z].SetMask(1);
793 bins[1][y*kNzBins+z].SetIndex(i);
797 FindClustersSDD(bins, kMAXBIN, kNzBins, digits, clusters);
803 void AliITSclustererV2::FindClustersSDD(AliITSRawStream* input,
804 TClonesArray** clusters)
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};
814 // read raw data input stream
816 Bool_t next = input->Next();
817 if (!next || input->IsNewModule()) {
818 Int_t iModule = input->GetPrevModuleID();
820 // when all data from a module was read, search for clusters
822 clusters[iModule] = new TClonesArray("AliITSclusterV2");
824 FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
825 Int_t nClusters = clusters[iModule]->GetEntriesFast();
826 nClustersSDD += nClusters;
832 bins[0] = new AliBin[kMaxBin];
833 bins[1] = new AliBin[kMaxBin];
836 // fill the current digit into the bins array
837 Int_t iz = input->GetCoord1()+1;
838 Int_t side = ((iz <= fNzSDD) ? 0 : 1);
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);
846 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
849 void AliITSclustererV2::
850 FindClustersSSD(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;
858 Int_t lab[4]={-2,-2,-2,-2};
859 Float_t tanp=fTanP, tann=fTanN;
860 if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
862 Int_t idet=fNdet[fI];
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());
879 qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
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
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) {
897 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
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
910 new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
916 void AliITSclustererV2::
917 FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
918 //------------------------------------------------------------
919 // Actual SSD cluster finder
920 //------------------------------------------------------------
921 Int_t smax=digits->GetEntriesFast();
924 const Int_t MAX=1000;
926 Ali1Dcluster pos[MAX], neg[MAX];
927 Float_t y=0., q=0., qmax=0.;
928 Int_t lab[4]={-2,-2,-2,-2};
930 AliITSdigitSSD *d=(AliITSdigitSSD*)digits->UncheckedAt(0);
932 y += d->GetCoord2()*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();
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()) {
947 c[*n].SetLabels(lab);
948 //Split suspiciously big cluster
950 c[*n].SetY(y/q-0.5*nd);
954 Error("FindClustersSSD","Too many 1D clusters !");
957 c[*n].SetY(y/q+0.5*nd);
960 c[*n].SetLabels(lab);
964 Error("FindClustersSSD","Too many 1D clusters !");
969 lab[0]=lab[1]=lab[2]=-2;
970 if (flag!=d->GetCoord1()) { n=&np; c=pos; }
974 y += d->GetCoord2()*d->GetSignal();
976 if (d->GetSignal()>qmax) {
978 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
985 c[*n].SetLabels(lab);
986 //Split suspiciously big cluster
988 c[*n].SetY(y/q-0.5*nd);
992 Error("FindClustersSSD","Too many 1D clusters !");
995 c[*n].SetY(y/q+0.5*nd);
998 c[*n].SetLabels(lab);
1002 Error("FindClustersSSD","Too many 1D clusters !");
1006 FindClustersSSD(neg, nn, pos, np, clusters);
1009 void AliITSclustererV2::FindClustersSSD(AliITSRawStream* input,
1010 TClonesArray** clusters)
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};
1022 Int_t prevStrip = -1;
1023 Int_t prevFlag = -1;
1025 // read raw data input stream
1027 Bool_t next = input->Next();
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)) &&
1035 if (nClusters[prevFlag] == MAX) {
1036 Error("FindClustersSSD", "Too many 1D clusters !");
1039 Ali1Dcluster& cluster = clusters1D[prevFlag][nClusters[prevFlag]++];
1042 cluster.SetNd(nDigits);
1044 //Split suspiciously big cluster
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 !");
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);
1061 if (!next || input->IsNewModule()) {
1062 Int_t iModule = input->GetPrevModuleID();
1064 // when all data from a module was read, search for clusters
1065 if (prevFlag >= 0) {
1066 clusters[iModule] = new TClonesArray("AliITSclusterV2");
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;
1075 nClusters[0] = nClusters[1] = 0;
1080 // add digit to current cluster
1081 q += input->GetSignal();
1082 y += strip * input->GetSignal();
1088 Info("FindClustersSSD", "found clusters in ITS SSD: %d", nClustersSSD);
1093 #include "AliITSDetType.h"
1095 #include "AliITSsegmentationSPD.h"
1096 #include "AliITSClusterFinderSPD.h"
1098 #include "AliITSresponseSDD.h"
1099 #include "AliITSsegmentationSDD.h"
1100 #include "AliITSClusterFinderSDD.h"
1102 #include "AliITSsegmentationSSD.h"
1103 #include "AliITSClusterFinderSSD.h"
1106 void AliITSclustererV2::
1107 FindClustersSPD(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);
1117 cf.FindRawClusters(fI);
1118 RecPoints2Clusters(points, fI, clusters);
1119 its->ResetRecPoints();
1123 void AliITSclustererV2::
1124 FindClustersSDD(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));
1137 cf.FindRawClusters(fI);
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.);
1143 RecPoints2Clusters(points, fI, clusters);
1144 its->ResetClusters(1);
1145 its->ResetRecPoints();
1149 void AliITSclustererV2::
1150 FindClustersSSD(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);
1160 cf.FindRawClusters(fI);
1161 RecPoints2Clusters(points, fI, clusters);
1162 its->ResetRecPoints();