1 //-------------------------------------------------------------------------
2 // Implementation of the ITS clusterer V2 class
4 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
5 //-------------------------------------------------------------------------
10 #include "AliITSclustererV2.h"
11 #include "AliITSclusterV2.h"
12 #include "AliITSDetTypeRec.h"
13 #include "AliRawReader.h"
14 #include "AliITSRawStreamSPD.h"
15 #include "AliITSRawStreamSDD.h"
16 #include "AliITSRawStreamSSD.h"
20 #include <TClonesArray.h>
21 #include "AliITSgeomTGeo.h"
22 #include "AliITSdigitSPD.h"
23 #include "AliITSdigitSDD.h"
24 #include "AliITSdigitSSD.h"
27 ClassImp(AliITSclustererV2)
29 extern AliRun *gAlice;
31 AliITSclustererV2::AliITSclustererV2():
57 for(Int_t i=0;i<260;i++)fYSPD[i]=0.;
58 for(Int_t i=0;i<170;i++)fZSPD[i]=0.;
59 for(Int_t i=0;i<2200;i++){
67 AliITSclustererV2::AliITSclustererV2(const Char_t *geom):
68 fNModules(AliITSgeomTGeo::GetNModules()),
71 fLastSPD1(AliITSgeomTGeo::GetModuleIndex(2,1,1)-1),
86 fLastSSD1(AliITSgeomTGeo::GetModuleIndex(6,1,1)-1),
92 //------------------------------------------------------------
93 // Standard constructor
94 //------------------------------------------------------------
96 AliWarning("\"geom\" is actually a dummy argument !");
99 for (m=0; m<fNModules; m++) {
100 Int_t lay,lad,det; AliITSgeomTGeo::GetModuleId(m,lay,lad,det);
101 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(m);
102 fYshift[m] = (tm->Inverse()).GetTranslation()[1];
103 fZshift[m] = (tm->Inverse()).GetTranslation()[2];
104 fNdet[m] = (lad-1)*AliITSgeomTGeo::GetNDetectors(lay) + (det-1);
109 fYSPD[0]=0.5*fYpitchSPD;
110 for (m=1; m<fNySPD; m++) fYSPD[m]=fYSPD[m-1]+fYpitchSPD;
111 fZSPD[0]=fZ1pitchSPD;
112 for (m=1; m<fNzSPD; m++) {
113 Double_t dz=fZ1pitchSPD;
114 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
115 m==127 || m==128) dz=fZ2pitchSPD;
116 fZSPD[m]=fZSPD[m-1]+dz;
118 for (m=0; m<fNzSPD; m++) {
119 Double_t dz=0.5*fZ1pitchSPD;
120 if (m==31 || m==32 || m==63 || m==64 || m==95 || m==96 ||
121 m==127 || m==128) dz=0.5*fZ2pitchSPD;
128 Int_t AliITSclustererV2::Digits2Clusters(TTree *dTree, TTree *cTree) {
129 //------------------------------------------------------------
130 // This function creates ITS clusters
131 //------------------------------------------------------------
135 Error("Digits2Clusters","Can't get the tree with digits !");
139 TClonesArray *digitsSPD=new TClonesArray("AliITSdigitSPD",3000);
140 dTree->SetBranchAddress("ITSDigitsSPD",&digitsSPD);
141 TClonesArray *digitsSDD=new TClonesArray("AliITSdigitSDD",3000);
142 dTree->SetBranchAddress("ITSDigitsSDD",&digitsSDD);
143 TClonesArray *digitsSSD=new TClonesArray("AliITSdigitSSD",3000);
144 dTree->SetBranchAddress("ITSDigitsSSD",&digitsSSD);
146 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",1000);
147 TBranch *branch=cTree->GetBranch("Clusters");
148 if (!branch) cTree->Branch("Clusters",&clusters);
149 else branch->SetAddress(&clusters);
151 Int_t mmax=(Int_t)dTree->GetEntries();
152 if (mmax!=fNModules) {
153 Error("Digits2Clusters","Number of entries != number of modules !");
157 for (fI=0; fI<mmax; fI++) {
160 if (digitsSPD->GetEntriesFast()!=0)
161 FindClustersSPD(digitsSPD,clusters);
163 if(digitsSDD->GetEntriesFast()!=0)
164 FindClustersSDD(digitsSDD,clusters);
165 else if(digitsSSD->GetEntriesFast()!=0)
166 FindClustersSSD(digitsSSD,clusters);
168 ncl+=clusters->GetEntriesFast();
188 Info("Digits2Clusters","Number of found clusters : %d",ncl);
193 void AliITSclustererV2::Digits2Clusters(AliRawReader* rawReader) {
194 //------------------------------------------------------------
195 // This function creates ITS clusters from raw data
196 //------------------------------------------------------------
197 AliRunLoader* runLoader = AliRunLoader::Instance();
199 Error("Digits2Clusters", "no run loader found");
202 runLoader->LoadKinematics();
203 AliLoader* itsLoader = runLoader->GetLoader("ITSLoader");
205 Error("Digits2Clusters", "no loader for ITS found");
208 if (!itsLoader->TreeR()) itsLoader->MakeTree("R");
209 TTree* cTree = itsLoader->TreeR();
211 TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
212 cTree->Branch("Clusters",&array);
215 TClonesArray** clusters = new TClonesArray*[fNModules];
216 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
217 clusters[iModule] = NULL;
219 // one TClonesArray per module
222 AliITSRawStreamSPD inputSPD(rawReader);
223 FindClustersSPD(&inputSPD, clusters);
226 AliITSRawStreamSDD inputSDD(rawReader);
227 FindClustersSDD(&inputSDD, clusters);
230 AliITSRawStreamSSD inputSSD(rawReader);
231 FindClustersSSD(&inputSSD, clusters);
233 // write all clusters to the tree
235 TClonesArray *emptyArray=new TClonesArray("AliITSclusterV2");
236 for (Int_t iModule = 0; iModule < fNModules; iModule++) {
237 array = clusters[iModule];
239 Error("Digits2Clusters", "data for module %d missing!", iModule);
242 cTree->SetBranchAddress("Clusters", &array);
244 nClusters += array->GetEntriesFast();
248 itsLoader->WriteRecPoints("OVERWRITE");
252 Info("Digits2Clusters", "total number of found clusters in ITS: %d\n",
256 //**** Fast clusters *******************************
257 #include "TParticle.h"
259 //#include "AliITS.h"
260 #include "AliITSmodule.h"
261 #include "AliITSRecPoint.h"
262 #include "AliITSsimulationFastPoints.h"
263 #include "AliITSRecPoint.h"
266 static void CheckLabels(Int_t lab[3]) {
267 //------------------------------------------------------------
268 // Tries to find mother's labels
269 //------------------------------------------------------------
270 AliRunLoader *rl = AliRunLoader::Instance();
271 TTree *trK=(TTree*)rl->TreeK();
276 TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
278 while (part->P() < 0.005) {
279 Int_t m=part->GetFirstMother();
281 Info("CheckLabels","Primary momentum: %f",part->P());
284 if (part->GetStatusCode()>0) {
285 Info("CheckLabels","Primary momentum: %f",part->P());
289 part=(TParticle*)gAlice->GetMCApp()->Particle(label);
298 // cerr<<"CheckLabels : No empty labels !\n";
305 static void CheckLabels(Int_t lab[3]) {
306 //------------------------------------------------------------
307 // Tries to find mother's labels
308 //------------------------------------------------------------
310 if(lab[0]<0 && lab[1]<0 && lab[2]<0) return; // In case of no labels just exit
312 Int_t ntracks = gAlice->GetMCApp()->GetNtrack();
313 for (Int_t i=0;i<3;i++){
314 Int_t label = lab[i];
315 if (label>=0 && label<ntracks) {
316 TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
317 if (part->P() < 0.005) {
318 Int_t m=part->GetFirstMother();
322 if (part->GetStatusCode()>0) {
332 static void CheckLabels2(Int_t lab[10]) {
333 //------------------------------------------------------------
334 // Tries to find mother's labels
335 //------------------------------------------------------------
336 AliRunLoader *rl = AliRunLoader::Instance();
337 TTree *trK=(TTree*)rl->TreeK();
341 for (Int_t i=0;i<10;i++) if (lab[i]>=0) nlabels++;
342 if(nlabels == 0) return; // In case of no labels just exit
344 Int_t ntracks = gAlice->GetMCApp()->GetNtrack();
346 for (Int_t i=0;i<10;i++){
347 Int_t label = lab[i];
348 if (label>=0 && label<ntracks) {
349 TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
350 if (part->P() < 0.02) {
351 Int_t m=part->GetFirstMother();
355 if (part->GetStatusCode()>0) {
361 if (part->P() < 0.12 && nlabels>3) {
367 if ( (label>ntracks||label <0) && nlabels>3) {
374 for (Int_t i=0;i<10;i++){
376 Int_t label = lab[i];
377 if (label>=0 && label<ntracks) {
378 TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
379 if (part->P() < 0.1) {
388 //compress labels -- if multi-times the same
390 for (Int_t i=0;i<10;i++) lab2[i]=-2;
391 for (Int_t i=0;i<10 ;i++){
392 if (lab[i]<0) continue;
393 for (Int_t j=0;j<10 &&lab2[j]!=lab[i];j++){
400 for (Int_t j=0;j<10;j++) lab[j]=lab2[j];
404 static void AddLabel(Int_t lab[10], Int_t label) {
405 // add label of the particle in the kine tree which originates this cluster
406 // (used for reconstruction of MC data only, for comparison purposes)
407 AliRunLoader *rl = AliRunLoader::Instance();
408 TTree *trK=(TTree*)rl->TreeK();
411 if(label<0) return; // In case of no label just exit
413 Int_t ntracks = gAlice->GetMCApp()->GetNtrack();
414 if (label>ntracks) return;
415 for (Int_t i=0;i<10;i++){
416 // if (label<0) break;
417 if (lab[i]==label) break;
426 void AliITSclustererV2::RecPoints2Clusters
427 (const TClonesArray *points, Int_t idx, TClonesArray *clusters) {
428 //------------------------------------------------------------
429 // Conversion AliITSRecPoint -> AliITSclusterV2 for the ITS
430 // subdetector indexed by idx
431 //------------------------------------------------------------
432 TClonesArray &cl=*clusters;
433 Int_t ncl=points->GetEntriesFast();
434 for (Int_t i=0; i<ncl; i++) {
435 AliITSRecPoint *p = (AliITSRecPoint *)points->UncheckedAt(i);
437 lp[0]=-(-p->GetDetLocalX()+fYshift[idx]); if (idx<=fLastSPD1) lp[0]*=-1; //SPD1
438 lp[1]= -p->GetZ()+fZshift[idx];
439 lp[2]=p->GetSigmaDetLocX2();
440 lp[3]=p->GetSigmaZ2();
441 lp[4]=p->GetQ()*36./23333.; //electrons -> ADC
443 lab[0]=p->GetLabel(0); lab[1]=p->GetLabel(1); lab[2]=p->GetLabel(2);
446 Int_t dummy[3]={0,0,0};
447 new (cl[i]) AliITSclusterV2(lab,lp, dummy);
451 //***********************************
454 void AliITSclustererV2::
455 FindCluster(Int_t k,Int_t maxz,AliBin *bins,Int_t &n,Int_t *idx) {
456 //------------------------------------------------------------
457 // returns an array of indices of digits belonging to the cluster
458 // (needed when the segmentation is not regular)
459 //------------------------------------------------------------
460 if (n<200) idx[n++]=bins[k].GetIndex();
463 if (bins[k-maxz].IsNotUsed()) FindCluster(k-maxz,maxz,bins,n,idx);
464 if (bins[k-1 ].IsNotUsed()) FindCluster(k-1 ,maxz,bins,n,idx);
465 if (bins[k+maxz].IsNotUsed()) FindCluster(k+maxz,maxz,bins,n,idx);
466 if (bins[k+1 ].IsNotUsed()) FindCluster(k+1 ,maxz,bins,n,idx);
468 if (bins[k-maxz-1].IsNotUsed()) FindCluster(k-maxz-1,maxz,bins,n,idx);
469 if (bins[k-maxz+1].IsNotUsed()) FindCluster(k-maxz+1,maxz,bins,n,idx);
470 if (bins[k+maxz-1].IsNotUsed()) FindCluster(k+maxz-1,maxz,bins,n,idx);
471 if (bins[k+maxz+1].IsNotUsed()) FindCluster(k+maxz+1,maxz,bins,n,idx);
475 void AliITSclustererV2::
476 FindClustersSPD(const TClonesArray *digits, TClonesArray *clusters) {
477 //------------------------------------------------------------
478 // Actual SPD cluster finder
479 //------------------------------------------------------------
480 Int_t kNzBins = fNzSPD + 2;
481 const Int_t kMAXBIN=kNzBins*(fNySPD+2);
483 Int_t ndigits=digits->GetEntriesFast();
484 AliBin *bins=new AliBin[kMAXBIN];
488 for (k=0; k<ndigits; k++) {
489 d=(AliITSdigitSPD*)digits->UncheckedAt(k);
490 Int_t i=d->GetCoord2()+1; //y
491 Int_t j=d->GetCoord1()+1;
492 bins[i*kNzBins+j].SetIndex(k);
493 bins[i*kNzBins+j].SetMask(1);
496 Int_t n=0; TClonesArray &cl=*clusters;
497 for (k=0; k<kMAXBIN; k++) {
498 if (!bins[k].IsNotUsed()) continue;
499 Int_t ni=0, idx[200];
500 FindCluster(k,kNzBins,bins,ni,idx);
502 Info("FindClustersSPD","Too big cluster !");
506 for (Int_t ilab=0;ilab<10;ilab++){
510 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
511 Int_t ymin=d->GetCoord2(),ymax=ymin;
512 Int_t zmin=d->GetCoord1(),zmax=zmin;
514 for (Int_t l=0; l<ni; l++) {
515 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[l]);
517 if (ymin > d->GetCoord2()) ymin=d->GetCoord2();
518 if (ymax < d->GetCoord2()) ymax=d->GetCoord2();
519 if (zmin > d->GetCoord1()) zmin=d->GetCoord1();
520 if (zmax < d->GetCoord1()) zmax=d->GetCoord1();
521 // MI addition - find all labels in cluster
522 for (Int_t dlab=0;dlab<10;dlab++){
523 Int_t digitlab = (d->GetTracks())[dlab];
524 if (digitlab<0) continue;
525 AddLabel(milab,digitlab);
527 if (milab[9]>0) CheckLabels2(milab);
531 //Int_t idy = (fNlayer[fI]==0)? 2:3;
532 //for (Int_t iz=zmin; iz<=zmax;iz+=2)
533 //Int_t idy = (ymax-ymin)/4.; // max 2 clusters
534 Int_t idy = 0; // max 2 clusters
535 if (fNlayer[fI]==0 &&idy<3) idy=3;
536 if (fNlayer[fI]==1 &&idy<4) idy=4;
538 for (Int_t iz=zmin; iz<=zmax;iz+=idz)
539 for (Int_t iy=ymin; iy<=ymax;iy+=idy){
542 Float_t y=0.,z=0.,q=0.;
543 for (Int_t l=0; l<ni; l++) {
544 d=(AliITSdigitSPD*)digits->UncheckedAt(idx[l]);
545 if (zmax-zmin>=idz || ymax-ymin>=idy){
546 if (TMath::Abs( d->GetCoord2()-iy)>0.75*idy) continue;
547 if (TMath::Abs( d->GetCoord1()-iz)>0.75*idz) continue;
550 Float_t qq=d->GetSignal();
551 y+=qq*fYSPD[d->GetCoord2()]; z+=qq*fZSPD[d->GetCoord1()]; q+=qq;
554 if (nodigits==0) continue;
556 y-=fHwSPD; z-=fHlSPD;
559 lp[0]=-(-y+fYshift[fI]); if (fI<=fLastSPD1) lp[0]=-lp[0];
560 lp[1]= -z+fZshift[fI];
561 // Float_t factor=TMath::Max(double(ni-3.),1.5);
562 Float_t factory=TMath::Max(ymax-ymin,1);
563 Float_t factorz=TMath::Max(zmax-zmin,1);
566 //lp[2]= (fYpitchSPD*fYpitchSPD/12.)*factory;
567 //lp[3]= (fZ1pitchSPD*fZ1pitchSPD/12.)*factorz;
568 lp[2]= (fYpitchSPD*fYpitchSPD/12.);
569 lp[3]= (fZ1pitchSPD*fZ1pitchSPD/12.);
571 lp[4]= (zmax-zmin+1)*100 + (ymax-ymin+1);
574 Int_t info[3] = {ymax-ymin+1,zmax-zmin+1,fNlayer[fI]};
575 new (cl[n]) AliITSclusterV2(milab,lp,info); n++;
582 void AliITSclustererV2::FindClustersSPD(AliITSRawStream* input,
583 TClonesArray** clusters)
585 //------------------------------------------------------------
586 // Actual SPD cluster finder for raw data
587 //------------------------------------------------------------
589 Int_t nClustersSPD = 0;
590 Int_t kNzBins = fNzSPD + 2;
591 Int_t kNyBins = fNySPD + 2;
592 Int_t kMaxBin = kNzBins * kNyBins;
593 AliBin *binsSPD = new AliBin[kMaxBin];
594 AliBin *binsSPDInit = new AliBin[kMaxBin];
597 // read raw data input stream
599 Bool_t next = input->Next();
600 if (!next || input->IsNewModule()) {
601 Int_t iModule = input->GetPrevModuleID();
603 // when all data from a module was read, search for clusters
605 clusters[iModule] = new TClonesArray("AliITSclusterV2");
608 for (Int_t iBin = 0; iBin < kMaxBin; iBin++) {
609 if (bins[iBin].IsUsed()) continue;
612 FindCluster(iBin, kNzBins, bins, nBins, idxBins);
614 Error("FindClustersSPD", "SPD: Too big cluster !\n");
622 // label[3] = iModule;
623 label[3] = fNdet[iModule];
625 Int_t ymin = (idxBins[0] / kNzBins) - 1;
627 Int_t zmin = (idxBins[0] % kNzBins) - 1;
629 for (Int_t idx = 0; idx < nBins; idx++) {
630 Int_t iy = (idxBins[idx] / kNzBins) - 1;
631 Int_t iz = (idxBins[idx] % kNzBins) - 1;
632 if (ymin > iy) ymin = iy;
633 if (ymax < iy) ymax = iy;
634 if (zmin > iz) zmin = iz;
635 if (zmax < iz) zmax = iz;
638 Int_t idy = 0; // max 2 clusters
639 if ((iModule <= fLastSPD1) &&idy<3) idy=3;
640 if ((iModule > fLastSPD1) &&idy<4) idy=4;
642 for (Int_t iiz=zmin; iiz<=zmax;iiz+=idz)
643 for (Int_t iiy=ymin; iiy<=ymax;iiy+=idy){
646 Float_t y=0.,z=0.,q=0.;
647 for (Int_t idx = 0; idx < nBins; idx++) {
648 Int_t iy = (idxBins[idx] / kNzBins) - 1;
649 Int_t iz = (idxBins[idx] % kNzBins) - 1;
650 if (zmax-zmin>=idz || ymax-ymin>=idy){
651 if (TMath::Abs(iy-iiy)>0.75*idy) continue;
652 if (TMath::Abs(iz-iiz)>0.75*idz) continue;
655 Float_t qBin = bins[idxBins[idx]].GetQ();
656 y += qBin * fYSPD[iy];
657 z += qBin * fZSPD[iz];
660 if (ndigits==0) continue;
666 Float_t hit[5]; // y, z, sigma(y)^2, sigma(z)^2, charge
667 hit[0] = -(-y+fYshift[iModule]);
668 if (iModule <= fLastSPD1) hit[0] = -hit[0];
669 hit[1] = -z+fZshift[iModule];
670 hit[2] = fYpitchSPD*fYpitchSPD/12.;
671 hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
673 hit[4] = (zmax-zmin+1)*100 + (ymax-ymin+1);
674 // CheckLabels(label);
675 Int_t info[3]={ymax-ymin+1,zmax-zmin+1,fNlayer[iModule]};
676 new (clusters[iModule]->AddrAt(nClusters))
677 AliITSclusterV2(label, hit,info);
682 nClustersSPD += nClusters;
688 memcpy(binsSPD,binsSPDInit,sizeof(AliBin)*kMaxBin);
691 // fill the current digit into the bins array
693 Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
694 bins[index].SetIndex(index);
695 bins[index].SetMask(1);
700 delete [] binsSPDInit;
703 Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
707 Bool_t AliITSclustererV2::IsMaximum(Int_t k,Int_t max,const AliBin *bins) {
708 //------------------------------------------------------------
709 //is this a local maximum ?
710 //------------------------------------------------------------
711 UShort_t q=bins[k].GetQ();
712 if (q==1023) return kFALSE;
713 if (bins[k-max].GetQ() > q) return kFALSE;
714 if (bins[k-1 ].GetQ() > q) return kFALSE;
715 if (bins[k+max].GetQ() > q) return kFALSE;
716 if (bins[k+1 ].GetQ() > q) return kFALSE;
717 if (bins[k-max-1].GetQ() > q) return kFALSE;
718 if (bins[k+max-1].GetQ() > q) return kFALSE;
719 if (bins[k+max+1].GetQ() > q) return kFALSE;
720 if (bins[k-max+1].GetQ() > q) return kFALSE;
724 void AliITSclustererV2::
725 FindPeaks(Int_t k,Int_t max,AliBin *b,Int_t *idx,UInt_t *msk,Int_t& n) {
726 //------------------------------------------------------------
728 //------------------------------------------------------------
730 if (IsMaximum(k,max,b)) {
731 idx[n]=k; msk[n]=(2<<n);
735 if (b[k-max].GetMask()&1) FindPeaks(k-max,max,b,idx,msk,n);
736 if (b[k-1 ].GetMask()&1) FindPeaks(k-1 ,max,b,idx,msk,n);
737 if (b[k+max].GetMask()&1) FindPeaks(k+max,max,b,idx,msk,n);
738 if (b[k+1 ].GetMask()&1) FindPeaks(k+1 ,max,b,idx,msk,n);
741 void AliITSclustererV2::
742 MarkPeak(Int_t k, Int_t max, AliBin *bins, UInt_t m) {
743 //------------------------------------------------------------
745 //------------------------------------------------------------
746 UShort_t q=bins[k].GetQ();
748 bins[k].SetMask(bins[k].GetMask()|m);
750 if (bins[k-max].GetQ() <= q)
751 if ((bins[k-max].GetMask()&m) == 0) MarkPeak(k-max,max,bins,m);
752 if (bins[k-1 ].GetQ() <= q)
753 if ((bins[k-1 ].GetMask()&m) == 0) MarkPeak(k-1 ,max,bins,m);
754 if (bins[k+max].GetQ() <= q)
755 if ((bins[k+max].GetMask()&m) == 0) MarkPeak(k+max,max,bins,m);
756 if (bins[k+1 ].GetQ() <= q)
757 if ((bins[k+1 ].GetMask()&m) == 0) MarkPeak(k+1 ,max,bins,m);
760 void AliITSclustererV2::
761 MakeCluster(Int_t k,Int_t max,AliBin *bins,UInt_t m,AliITSclusterV2 &c) {
762 //------------------------------------------------------------
763 //make cluster using digits of this peak
764 //------------------------------------------------------------
765 Float_t q=(Float_t)bins[k].GetQ();
766 Int_t i=k/max, j=k-i*max;
769 c.SetY(c.GetY()+i*q);
770 c.SetZ(c.GetZ()+j*q);
771 c.SetSigmaY2(c.GetSigmaY2()+i*i*q);
772 c.SetSigmaZ2(c.GetSigmaZ2()+j*j*q);
774 bins[k].SetMask(0xFFFFFFFE);
776 if (bins[k-max].GetMask() == m) MakeCluster(k-max,max,bins,m,c);
777 if (bins[k-1 ].GetMask() == m) MakeCluster(k-1 ,max,bins,m,c);
778 if (bins[k+max].GetMask() == m) MakeCluster(k+max,max,bins,m,c);
779 if (bins[k+1 ].GetMask() == m) MakeCluster(k+1 ,max,bins,m,c);
782 void AliITSclustererV2::
783 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
784 const TClonesArray *digits, TClonesArray *clusters) {
785 //------------------------------------------------------------
786 // Actual SDD cluster finder
787 //------------------------------------------------------------
788 Int_t ncl=0; TClonesArray &cl=*clusters;
789 for (Int_t s=0; s<2; s++)
790 for (Int_t i=0; i<nMaxBin; i++) {
791 if (bins[s][i].IsUsed()) continue;
792 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
793 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
795 if (npeaks>30) continue;
796 if (npeaks==0) continue;
799 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
800 if (idx[k] < 0) continue; //this peak is already removed
801 for (l=k+1; l<npeaks; l++) {
802 if (idx[l] < 0) continue; //this peak is already removed
803 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
804 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
805 Int_t di=TMath::Abs(ki - li);
806 Int_t dj=TMath::Abs(kj - lj);
807 if (di>1 || dj>1) continue;
808 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
819 for (k=0; k<npeaks; k++) {
820 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
823 for (k=0; k<npeaks; k++) {
824 if (idx[k] < 0) continue; //removed peak
826 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
829 for (Int_t ilab=0;ilab<10;ilab++){
832 Int_t maxi=0,mini=0,maxj=0,minj=0;
833 //AliBin *bmax=&bins[s][idx[k]];
834 //Float_t max = TMath::Max(TMath::Abs(bmax->GetQ())/5.,3.);
836 for (Int_t di=-2; di<=2;di++)
837 for (Int_t dj=-3;dj<=3;dj++){
838 Int_t index = idx[k]+di+dj*nzBins;
839 if (index<0) continue;
840 if (index>=nMaxBin) continue;
841 AliBin *b=&bins[s][index];
842 if (TMath::Abs(b->GetQ())>max){
843 if (di>maxi) maxi=di;
844 if (di<mini) mini=di;
845 if (dj>maxj) maxj=dj;
846 if (dj<minj) minj=dj;
849 if (TMath::Abs(di)<2&&TMath::Abs(dj)<2){
850 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
851 for (Int_t itrack=0;itrack<10;itrack++){
852 Int_t track = (d->GetTracks())[itrack];
854 AddLabel(milab, track);
863 Float_t s2 = c.GetSigmaY2()/c.GetQ() - c.GetY()*c.GetY();
864 Float_t w=par->GetPadPitchWidth(sec);
867 c.SetSigmaY2(c.GetSigmaY2()*0.108);
868 if (sec<par->GetNInnerSector()) c.SetSigmaY2(c.GetSigmaY2()*2.07);
870 s2 = c.GetSigmaZ2()/c.GetQ() - c.GetZ()*c.GetZ();
875 c.SetSigmaZ2(c.GetSigmaZ2()*0.169);
876 if (sec<par->GetNInnerSector()) c.SetSigmaZ2(c.GetSigmaZ2()*1.77);
880 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
883 //Float_t s2 = c.GetSigmaY2()/c.GetQ() - y*y;
885 //s2 = c.GetSigmaZ2()/c.GetQ() - z*z;
888 y=(y-0.5)*fYpitchSDD;
890 y-=fYoffSDD; //delay ?
893 z=(z-0.5)*fZpitchSDD;
899 q/=12.7; //this WAS consistent with SSD. To be reassessed
901 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
902 Int_t info[3] = {maxj-minj+1, maxi-mini+1, fNlayer[fI]};
904 if (c.GetQ() < 20.) continue; //noise cluster
907 // AliBin *b=&bins[s][idx[k]];
908 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
911 //lab[0]=(d->GetTracks())[0];
912 //lab[1]=(d->GetTracks())[1];
913 //lab[2]=(d->GetTracks())[2];
920 AliITSclusterV2 *cc = new (cl[ncl]) AliITSclusterV2(milab,hit,info);
927 void AliITSclustererV2::
928 FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
929 //------------------------------------------------------------
930 // Actual SDD cluster finder
931 //------------------------------------------------------------
932 Int_t kNzBins = fNzSDD + 2;
933 const Int_t kMAXBIN=kNzBins*(fNySDD+2);
936 bins[0]=new AliBin[kMAXBIN];
937 bins[1]=new AliBin[kMAXBIN];
940 Int_t i, ndigits=digits->GetEntriesFast();
941 for (i=0; i<ndigits; i++) {
942 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
943 Int_t y=d->GetCoord2()+1; //y
944 Int_t z=d->GetCoord1()+1; //z
945 Int_t q=d->GetSignal();
949 bins[0][y*kNzBins+z].SetQ(q);
950 bins[0][y*kNzBins+z].SetMask(1);
951 bins[0][y*kNzBins+z].SetIndex(i);
954 bins[1][y*kNzBins+z].SetQ(q);
955 bins[1][y*kNzBins+z].SetMask(1);
956 bins[1][y*kNzBins+z].SetIndex(i);
960 FindClustersSDD(bins, kMAXBIN, kNzBins, digits, clusters);
967 void AliITSclustererV2::FindClustersSDD(AliITSRawStream* input,
968 TClonesArray** clusters)
970 //------------------------------------------------------------
971 // Actual SDD cluster finder for raw data
972 //------------------------------------------------------------
973 Int_t nClustersSDD = 0;
974 Int_t kNzBins = fNzSDD + 2;
975 Int_t kMaxBin = kNzBins * (fNySDD+2);
976 AliBin *binsSDDInit = new AliBin[kMaxBin];
977 AliBin *binsSDD1 = new AliBin[kMaxBin];
978 AliBin *binsSDD2 = new AliBin[kMaxBin];
979 AliBin *bins[2] = {NULL, NULL};
981 // read raw data input stream
983 Bool_t next = input->Next();
984 if (!next || input->IsNewModule()) {
985 Int_t iModule = input->GetPrevModuleID();
987 // when all data from a module was read, search for clusters
989 clusters[iModule] = new TClonesArray("AliITSclusterV2");
991 FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
992 Int_t nClusters = clusters[iModule]->GetEntriesFast();
993 nClustersSDD += nClusters;
994 bins[0] = bins[1] = NULL;
1000 memcpy(binsSDD1,binsSDDInit,sizeof(AliBin)*kMaxBin);
1001 memcpy(binsSDD2,binsSDDInit,sizeof(AliBin)*kMaxBin);
1004 // fill the current digit into the bins array
1005 if(input->GetSignal()>=3) {
1006 Int_t iz = input->GetCoord1()+1;
1007 Int_t side = ((iz <= fNzSDD) ? 0 : 1);
1009 Int_t index = (input->GetCoord2()+1) * kNzBins + iz;
1010 bins[side][index].SetQ(input->GetSignal());
1011 bins[side][index].SetMask(1);
1012 bins[side][index].SetIndex(index);
1018 delete[] binsSDDInit;
1020 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
1025 void AliITSclustererV2::
1026 FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
1027 Ali1Dcluster* pos, Int_t np,
1028 TClonesArray *clusters) {
1029 //------------------------------------------------------------
1030 // Actual SSD cluster finder
1031 //------------------------------------------------------------
1032 TClonesArray &cl=*clusters;
1034 Float_t tanp=fTanP, tann=fTanN;
1035 if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
1036 Int_t idet=fNdet[fI];
1039 Int_t negativepair[30000];
1040 Int_t cnegative[3000];
1042 Int_t positivepair[30000];
1043 Int_t cpositive[3000];
1045 for (Int_t i=0;i<3000;i++) {cnegative[i]=0; cused1[i]=0;}
1046 for (Int_t i=0;i<3000;i++) {cpositive[i]=0; cused2[i]=0;}
1047 for (Int_t i=0;i<30000;i++){negativepair[i]=positivepair[i]=0;}
1048 static Short_t pairs[1000][1000];
1049 memset(pairs,0,sizeof(Short_t)*1000000);
1050 // Short_t ** pairs = new Short_t*[1000];
1051 // for (Int_t i=0; i<1000; i++) {
1052 // pairs[i] = new Short_t[1000];
1053 // memset(pairs[i],0,sizeof(Short_t)*1000);
1056 // find available pairs
1058 for (Int_t i=0; i<np; i++) {
1059 Float_t yp=pos[i].GetY()*fYpitchSSD;
1060 if (pos[i].GetQ()<3) continue;
1061 for (Int_t j=0; j<nn; j++) {
1062 if (neg[j].GetQ()<3) continue;
1063 Float_t yn=neg[j].GetY()*fYpitchSSD;
1064 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1065 Float_t yt=yn + tann*zt;
1066 zt-=fHlSSD; yt-=fHwSSD;
1067 if (TMath::Abs(yt)<fHwSSD+0.01)
1068 if (TMath::Abs(zt)<fHlSSD+0.01*(neg[j].GetNd()+pos[i].GetNd())) {
1069 negativepair[i*10+cnegative[i]] =j; //index
1070 positivepair[j*10+cpositive[j]] =i;
1071 cnegative[i]++; //counters
1078 for (Int_t i=0; i<np; i++) {
1079 Float_t yp=pos[i].GetY()*fYpitchSSD;
1080 if (pos[i].GetQ()<3) continue;
1081 for (Int_t j=0; j<nn; j++) {
1082 if (neg[j].GetQ()<3) continue;
1083 if (cpositive[j]&&cnegative[i]) continue;
1084 Float_t yn=neg[j].GetY()*fYpitchSSD;
1085 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1086 Float_t yt=yn + tann*zt;
1087 zt-=fHlSSD; yt-=fHwSSD;
1088 if (TMath::Abs(yt)<fHwSSD+0.1)
1089 if (TMath::Abs(zt)<fHlSSD+0.15) {
1090 if (cnegative[i]==0) pos[i].SetNd(100); // not available pair
1091 if (cpositive[j]==0) neg[j].SetNd(100); // not available pair
1092 negativepair[i*10+cnegative[i]] =j; //index
1093 positivepair[j*10+cpositive[j]] =i;
1094 cnegative[i]++; //counters
1108 for (Int_t ip=0;ip<np;ip++){
1109 Float_t ybest=1000,zbest=1000,qbest=0;
1111 // select gold clusters
1112 if ( (cnegative[ip]==1) && cpositive[negativepair[10*ip]]==1){
1113 Float_t yp=pos[ip].GetY()*fYpitchSSD;
1114 Int_t j = negativepair[10*ip];
1115 ratio = (pos[ip].GetQ()-neg[j].GetQ())/(pos[ip].GetQ()+neg[j].GetQ());
1117 Float_t yn=neg[j].GetY()*fYpitchSSD;
1118 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1119 Float_t yt=yn + tann*zt;
1120 zt-=fHlSSD; yt-=fHwSSD;
1122 qbest=0.5*(pos[ip].GetQ()+neg[j].GetQ());
1123 lp[0]=-(-ybest+fYshift[fI]);
1124 lp[1]= -zbest+fZshift[fI];
1125 lp[2]=0.0025*0.0025; //SigmaY2
1126 lp[3]=0.110*0.110; //SigmaZ2
1129 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1130 for (Int_t ilab=0;ilab<3;ilab++){
1131 milab[ilab] = pos[ip].GetLabel(ilab);
1132 milab[ilab+3] = neg[j].GetLabel(ilab);
1135 CheckLabels2(milab);
1136 milab[3]=(((ip<<10) + j)<<10) + idet; // pos|neg|det
1137 Int_t info[3] = {pos[ip].GetNd(),neg[j].GetNd(),fNlayer[fI]};
1138 AliITSclusterV2 * cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1140 cl2->SetChargeRatio(ratio);
1143 if ((pos[ip].GetNd()+neg[j].GetNd())>6){ //multi cluster
1152 for (Int_t ip=0;ip<np;ip++){
1153 Float_t ybest=1000,zbest=1000,qbest=0;
1156 // select "silber" cluster
1157 if ( cnegative[ip]==1 && cpositive[negativepair[10*ip]]==2){
1158 Int_t in = negativepair[10*ip];
1159 Int_t ip2 = positivepair[10*in];
1160 if (ip2==ip) ip2 = positivepair[10*in+1];
1161 Float_t pcharge = pos[ip].GetQ()+pos[ip2].GetQ();
1162 if (TMath::Abs(pcharge-neg[in].GetQ())<10){
1165 if (pairs[ip][in]==100){ //
1166 Float_t yp=pos[ip].GetY()*fYpitchSSD;
1167 Float_t yn=neg[in].GetY()*fYpitchSSD;
1168 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1169 Float_t yt=yn + tann*zt;
1170 zt-=fHlSSD; yt-=fHwSSD;
1171 ybest =yt; zbest=zt;
1172 qbest =pos[ip].GetQ();
1173 lp[0]=-(-ybest+fYshift[fI]);
1174 lp[1]= -zbest+fZshift[fI];
1175 lp[2]=0.0025*0.0025; //SigmaY2
1176 lp[3]=0.110*0.110; //SigmaZ2
1179 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1180 for (Int_t ilab=0;ilab<3;ilab++){
1181 milab[ilab] = pos[ip].GetLabel(ilab);
1182 milab[ilab+3] = neg[in].GetLabel(ilab);
1185 CheckLabels2(milab);
1186 ratio = (pos[ip].GetQ()-neg[in].GetQ())/(pos[ip].GetQ()+neg[in].GetQ());
1187 milab[3]=(((ip<<10) + in)<<10) + idet; // pos|neg|det
1188 Int_t info[3] = {pos[ip].GetNd(),neg[in].GetNd(),fNlayer[fI]};
1189 AliITSclusterV2 * cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1191 cl2->SetChargeRatio(ratio);
1194 if ((pos[ip].GetNd()+neg[in].GetNd())>6){ //multi cluster
1202 // if (!(cused1[ip2] || cused2[in])){ //
1203 if (pairs[ip2][in]==100){
1204 Float_t yp=pos[ip2].GetY()*fYpitchSSD;
1205 Float_t yn=neg[in].GetY()*fYpitchSSD;
1206 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1207 Float_t yt=yn + tann*zt;
1208 zt-=fHlSSD; yt-=fHwSSD;
1209 ybest =yt; zbest=zt;
1210 qbest =pos[ip2].GetQ();
1211 lp[0]=-(-ybest+fYshift[fI]);
1212 lp[1]= -zbest+fZshift[fI];
1213 lp[2]=0.0025*0.0025; //SigmaY2
1214 lp[3]=0.110*0.110; //SigmaZ2
1217 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1218 for (Int_t ilab=0;ilab<3;ilab++){
1219 milab[ilab] = pos[ip2].GetLabel(ilab);
1220 milab[ilab+3] = neg[in].GetLabel(ilab);
1223 CheckLabels2(milab);
1224 ratio = (pos[ip2].GetQ()-neg[in].GetQ())/(pos[ip2].GetQ()+neg[in].GetQ());
1225 milab[3]=(((ip2<<10) + in)<<10) + idet; // pos|neg|det
1226 Int_t info[3] = {pos[ip2].GetNd(),neg[in].GetNd(),fNlayer[fI]};
1227 AliITSclusterV2 *cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1229 cl2->SetChargeRatio(ratio);
1232 if ((pos[ip2].GetNd()+neg[in].GetNd())>6){ //multi cluster
1245 for (Int_t jn=0;jn<nn;jn++){
1246 if (cused2[jn]) continue;
1247 Float_t ybest=1000,zbest=1000,qbest=0;
1248 // select "silber" cluster
1249 if ( cpositive[jn]==1 && cnegative[positivepair[10*jn]]==2){
1250 Int_t ip = positivepair[10*jn];
1251 Int_t jn2 = negativepair[10*ip];
1252 if (jn2==jn) jn2 = negativepair[10*ip+1];
1253 Float_t pcharge = neg[jn].GetQ()+neg[jn2].GetQ();
1255 if (TMath::Abs(pcharge-pos[ip].GetQ())<10){
1258 // if (!(cused1[ip]||cused2[jn])){
1259 if (pairs[ip][jn]==100){
1260 Float_t yn=neg[jn].GetY()*fYpitchSSD;
1261 Float_t yp=pos[ip].GetY()*fYpitchSSD;
1262 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1263 Float_t yt=yn + tann*zt;
1264 zt-=fHlSSD; yt-=fHwSSD;
1265 ybest =yt; zbest=zt;
1266 qbest =neg[jn].GetQ();
1267 lp[0]=-(-ybest+fYshift[fI]);
1268 lp[1]= -zbest+fZshift[fI];
1269 lp[2]=0.0025*0.0025; //SigmaY2
1270 lp[3]=0.110*0.110; //SigmaZ2
1273 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1274 for (Int_t ilab=0;ilab<3;ilab++){
1275 milab[ilab] = pos[ip].GetLabel(ilab);
1276 milab[ilab+3] = neg[jn].GetLabel(ilab);
1279 CheckLabels2(milab);
1280 ratio = (pos[ip].GetQ()-neg[jn].GetQ())/(pos[ip].GetQ()+neg[jn].GetQ());
1281 milab[3]=(((ip<<10) + jn)<<10) + idet; // pos|neg|det
1282 Int_t info[3] = {pos[ip].GetNd(),neg[jn].GetNd(),fNlayer[fI]};
1283 AliITSclusterV2 * cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1285 cl2->SetChargeRatio(ratio);
1288 if ((pos[ip].GetNd()+neg[jn].GetNd())>6){ //multi cluster
1295 // if (!(cused1[ip]||cused2[jn2])){
1296 if (pairs[ip][jn2]==100){
1297 Float_t yn=neg[jn2].GetY()*fYpitchSSD;
1298 Double_t yp=pos[ip].GetY()*fYpitchSSD;
1299 Double_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1300 Double_t yt=yn + tann*zt;
1301 zt-=fHlSSD; yt-=fHwSSD;
1302 ybest =yt; zbest=zt;
1303 qbest =neg[jn2].GetQ();
1304 lp[0]=-(-ybest+fYshift[fI]);
1305 lp[1]= -zbest+fZshift[fI];
1306 lp[2]=0.0025*0.0025; //SigmaY2
1307 lp[3]=0.110*0.110; //SigmaZ2
1310 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1311 for (Int_t ilab=0;ilab<3;ilab++){
1312 milab[ilab] = pos[ip].GetLabel(ilab);
1313 milab[ilab+3] = neg[jn2].GetLabel(ilab);
1316 CheckLabels2(milab);
1317 ratio = (pos[ip].GetQ()-neg[jn2].GetQ())/(pos[ip].GetQ()+neg[jn2].GetQ());
1318 milab[3]=(((ip<<10) + jn2)<<10) + idet; // pos|neg|det
1319 Int_t info[3] = {pos[ip].GetNd(),neg[jn2].GetNd(),fNlayer[fI]};
1320 AliITSclusterV2* cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1322 cl2->SetChargeRatio(ratio);
1325 if ((pos[ip].GetNd()+neg[jn2].GetNd())>6){ //multi cluster
1337 for (Int_t ip=0;ip<np;ip++){
1338 Float_t ybest=1000,zbest=1000,qbest=0;
1342 if ( (cnegative[ip]<5) && cpositive[negativepair[10*ip]]<5){
1343 Float_t minchargediff =4.;
1345 for (Int_t di=0;di<cnegative[ip];di++){
1346 Int_t jc = negativepair[ip*10+di];
1347 Float_t chargedif = pos[ip].GetQ()-neg[jc].GetQ();
1348 if (TMath::Abs(chargedif)<minchargediff){
1350 minchargediff = TMath::Abs(chargedif);
1353 if (j<0) continue; // not proper cluster
1355 for (Int_t di=0;di<cnegative[ip];di++){
1356 Int_t jc = negativepair[ip*10+di];
1357 Float_t chargedif = pos[ip].GetQ()-neg[jc].GetQ();
1358 if (TMath::Abs(chargedif)<minchargediff+3.) count++;
1360 if (count>1) continue; // more than one "proper" cluster for positive
1363 for (Int_t dj=0;dj<cpositive[j];dj++){
1364 Int_t ic = positivepair[j*10+dj];
1365 Float_t chargedif = pos[ic].GetQ()-neg[j].GetQ();
1366 if (TMath::Abs(chargedif)<minchargediff+3.) count++;
1368 if (count>1) continue; // more than one "proper" cluster for negative
1373 for (Int_t dj=0;dj<cnegative[jp];dj++){
1374 Int_t ic = positivepair[jp*10+dj];
1375 Float_t chargedif = pos[ic].GetQ()-neg[jp].GetQ();
1376 if (TMath::Abs(chargedif)<minchargediff+4.) count++;
1378 if (count>1) continue;
1379 if (pairs[ip][j]<100) continue;
1381 //almost gold clusters
1382 Float_t yp=pos[ip].GetY()*fYpitchSSD;
1383 Float_t yn=neg[j].GetY()*fYpitchSSD;
1384 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1385 Float_t yt=yn + tann*zt;
1386 zt-=fHlSSD; yt-=fHwSSD;
1388 qbest=0.5*(pos[ip].GetQ()+neg[j].GetQ());
1389 lp[0]=-(-ybest+fYshift[fI]);
1390 lp[1]= -zbest+fZshift[fI];
1391 lp[2]=0.0025*0.0025; //SigmaY2
1392 lp[3]=0.110*0.110; //SigmaZ2
1394 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1395 for (Int_t ilab=0;ilab<3;ilab++){
1396 milab[ilab] = pos[ip].GetLabel(ilab);
1397 milab[ilab+3] = neg[j].GetLabel(ilab);
1400 CheckLabels2(milab);
1401 ratio = (pos[ip].GetQ()-neg[j].GetQ())/(pos[ip].GetQ()+neg[j].GetQ());
1402 milab[3]=(((ip<<10) + j)<<10) + idet; // pos|neg|det
1403 Int_t info[3] = {pos[ip].GetNd(),neg[j].GetNd(),fNlayer[fI]};
1404 AliITSclusterV2 * cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1406 cl2->SetChargeRatio(ratio);
1409 if ((pos[ip].GetNd()+neg[j].GetNd())>6){ //multi cluster
1420 for (Int_t i=0; i<np; i++) {
1421 Float_t ybest=1000,zbest=1000,qbest=0;
1422 Float_t yp=pos[i].GetY()*fYpitchSSD;
1423 if (pos[i].GetQ()<3) continue;
1424 for (Int_t j=0; j<nn; j++) {
1425 // for (Int_t di = 0;di<cpositive[i];di++){
1426 // Int_t j = negativepair[10*i+di];
1427 if (neg[j].GetQ()<3) continue;
1428 if (cused2[j]||cused1[i]) continue;
1429 if (pairs[i][j]>0 &&pairs[i][j]<100) continue;
1430 ratio = (pos[i].GetQ()-neg[j].GetQ())/(pos[i].GetQ()+neg[j].GetQ());
1431 Float_t yn=neg[j].GetY()*fYpitchSSD;
1432 Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
1433 Float_t yt=yn + tann*zt;
1434 zt-=fHlSSD; yt-=fHwSSD;
1435 if (TMath::Abs(yt)<fHwSSD+0.01)
1436 if (TMath::Abs(zt)<fHlSSD+0.01*(neg[j].GetNd()+pos[i].GetNd())) {
1438 qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
1439 lp[0]=-(-ybest+fYshift[fI]);
1440 lp[1]= -zbest+fZshift[fI];
1441 lp[2]=0.0025*0.0025; //SigmaY2
1442 lp[3]=0.110*0.110; //SigmaZ2
1445 for (Int_t ilab=0;ilab<10;ilab++) milab[ilab]=-2;
1446 for (Int_t ilab=0;ilab<3;ilab++){
1447 milab[ilab] = pos[i].GetLabel(ilab);
1448 milab[ilab+3] = neg[j].GetLabel(ilab);
1451 CheckLabels2(milab);
1452 milab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
1453 Int_t info[3] = {pos[i].GetNd(),neg[j].GetNd(),fNlayer[fI]};
1454 AliITSclusterV2 * cl2 = new (cl[ncl]) AliITSclusterV2(milab,lp,info);
1456 cl2->SetChargeRatio(ratio);
1457 cl2->SetType(100+cpositive[j]+cnegative[i]);
1460 if (pairs[i][j]<100){
1461 printf("problem:- %d\n", pairs[i][j]);
1463 if (cnegative[i]<2&&cpositive[j]<2){
1464 printf("problem:- %d\n", pairs[i][j]);
1471 // for (Int_t i=0; i<1000; i++) delete [] pairs[i];
1477 void AliITSclustererV2::
1478 FindClustersSSD(const TClonesArray *alldigits, TClonesArray *clusters) {
1479 //------------------------------------------------------------
1480 // Actual SSD cluster finder
1481 //------------------------------------------------------------
1482 Int_t smaxall=alldigits->GetEntriesFast();
1483 if (smaxall==0) return;
1484 TObjArray *digits = new TObjArray;
1485 for (Int_t i=0;i<smaxall; i++){
1486 AliITSdigitSSD *d=(AliITSdigitSSD*)alldigits->UncheckedAt(i);
1487 if (d->GetSignal()<3) continue;
1490 Int_t smax = digits->GetEntriesFast();
1491 if (smax==0) return;
1493 const Int_t MAX=1000;
1495 Ali1Dcluster pos[MAX], neg[MAX];
1496 Float_t y=0., q=0., qmax=0.;
1497 Int_t lab[4]={-2,-2,-2,-2};
1499 AliITSdigitSSD *d=(AliITSdigitSSD*)digits->UncheckedAt(0);
1500 q += d->GetSignal();
1501 y += d->GetCoord2()*d->GetSignal();
1502 qmax=d->GetSignal();
1503 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
1504 Int_t curr=d->GetCoord2();
1505 Int_t flag=d->GetCoord1();
1507 Ali1Dcluster *c=neg;
1510 for (Int_t ilab=0;ilab<10;ilab++){
1513 milab[0]=d->GetTrack(0); milab[1]=d->GetTrack(1); milab[2]=d->GetTrack(2);
1515 for (Int_t s=1; s<smax; s++) {
1516 d=(AliITSdigitSSD*)digits->UncheckedAt(s);
1517 Int_t strip=d->GetCoord2();
1518 if ((strip-curr) > 1 || flag!=d->GetCoord1()) {
1522 CheckLabels2(milab);
1523 c[*n].SetLabels(milab);
1524 //Split suspiciously big cluster
1527 c[*n].SetY(y/q-0.3*nd);
1531 Error("FindClustersSSD","Too many 1D clusters !");
1534 c[*n].SetY(y/q-0.0*nd);
1539 Error("FindClustersSSD","Too many 1D clusters !");
1543 c[*n].SetY(y/q+0.3*nd);
1546 c[*n].SetLabels(milab);
1551 c[*n].SetY(y/q-0.25*nd);
1555 Error("FindClustersSSD","Too many 1D clusters !");
1558 c[*n].SetY(y/q+0.25*nd);
1561 c[*n].SetLabels(milab);
1565 Error("FindClustersSSD","Too many 1D clusters !");
1570 lab[0]=lab[1]=lab[2]=-2;
1572 for (Int_t ilab=0;ilab<10;ilab++){
1576 if (flag!=d->GetCoord1()) { n=&np; c=pos; }
1578 flag=d->GetCoord1();
1579 q += d->GetSignal();
1580 y += d->GetCoord2()*d->GetSignal();
1582 if (d->GetSignal()>qmax) {
1583 qmax=d->GetSignal();
1584 lab[0]=d->GetTrack(0); lab[1]=d->GetTrack(1); lab[2]=d->GetTrack(2);
1586 for (Int_t ilab=0;ilab<10;ilab++) {
1587 if (d->GetTrack(ilab)>=0) AddLabel(milab, (d->GetTrack(ilab)));
1594 c[*n].SetLabels(lab);
1595 //Split suspiciously big cluster
1596 if (nd>4 && nd<25) {
1597 c[*n].SetY(y/q-0.25*nd);
1601 Error("FindClustersSSD","Too many 1D clusters !");
1604 c[*n].SetY(y/q+0.25*nd);
1607 c[*n].SetLabels(lab);
1611 Error("FindClustersSSD","Too many 1D clusters !");
1615 FindClustersSSD(neg, nn, pos, np, clusters);
1618 void AliITSclustererV2::FindClustersSSD(AliITSRawStream* input,
1619 TClonesArray** clusters)
1621 //------------------------------------------------------------
1622 // Actual SSD cluster finder for raw data
1623 //------------------------------------------------------------
1624 Int_t nClustersSSD = 0;
1625 const Int_t MAX = 1000;
1626 Ali1Dcluster clusters1D[2][MAX];
1627 Int_t nClusters[2] = {0, 0};
1628 Int_t lab[3]={-2,-2,-2};
1632 Int_t prevStrip = -1;
1633 Int_t prevFlag = -1;
1634 Int_t prevModule = -1;
1636 // read raw data input stream
1638 Bool_t next = input->Next();
1640 if(input->GetSignal()<3 && next) continue;
1641 // check if a new cluster starts
1642 Int_t strip = input->GetCoord2();
1643 Int_t flag = input->GetCoord1();
1644 if ((!next || (input->GetModuleID() != prevModule)||
1645 (strip-prevStrip > 1) || (flag != prevFlag)) &&
1647 if (nClusters[prevFlag] == MAX) {
1648 Error("FindClustersSSD", "Too many 1D clusters !");
1651 Ali1Dcluster& cluster = clusters1D[prevFlag][nClusters[prevFlag]++];
1654 cluster.SetNd(nDigits);
1655 cluster.SetLabels(lab);
1657 //Split suspiciously big cluster
1658 if (nDigits > 4&&nDigits < 25) {
1659 cluster.SetY(y/q - 0.25*nDigits);
1660 cluster.SetQ(0.5*q);
1661 if (nClusters[prevFlag] == MAX) {
1662 Error("FindClustersSSD", "Too many 1D clusters !");
1665 Ali1Dcluster& cluster2 = clusters1D[prevFlag][nClusters[prevFlag]++];
1666 cluster2.SetY(y/q + 0.25*nDigits);
1667 cluster2.SetQ(0.5*q);
1668 cluster2.SetNd(nDigits);
1669 cluster2.SetLabels(lab);
1675 if (!next || (input->GetModuleID() != prevModule)) {
1676 Int_t iModule = prevModule;
1678 // when all data from a module was read, search for clusters
1679 if (prevFlag >= 0) {
1680 clusters[iModule] = new TClonesArray("AliITSclusterV2");
1682 FindClustersSSD(&clusters1D[0][0], nClusters[0],
1683 &clusters1D[1][0], nClusters[1], clusters[iModule]);
1684 Int_t noClusters = clusters[iModule]->GetEntriesFast();
1685 nClustersSSD += noClusters;
1689 nClusters[0] = nClusters[1] = 0;
1694 // add digit to current cluster
1695 q += input->GetSignal();
1696 y += strip * input->GetSignal();
1700 prevModule = input->GetModuleID();
1704 Info("FindClustersSSD", "found clusters in ITS SSD: %d", nClustersSSD);