#include "AliITSclustererV2.h"
#include "AliITSclusterV2.h"
+#include "AliITSRawStreamSPD.h"
+#include "AliITSRawStreamSDD.h"
+#include "AliITSRawStreamSSD.h"
#include <Riostream.h>
#include <TFile.h>
fZshift[m] = (Double_t)z;
fNdet[m] = (lad-1)*g->GetNdetectors(lay) + (det-1);
}
+ fNModules = g->GetIndexMax();
//SPD geometry
fLastSPD1=g->GetModuleIndex(2,1,1)-1;
savedir->cd();
}
+void AliITSclustererV2::Digits2Clusters(TFile *out) {
+ //------------------------------------------------------------
+ // This function creates ITS clusters from raw data
+ //------------------------------------------------------------
+ TDirectory *savedir=gDirectory;
+ if (!out->IsOpen()) {
+ cerr<<"AliITSclustererV2::Digits2Clusters(): output file not open !\n";
+ return;
+ }
+ out->cd();
+
+ Char_t name[100];
+ sprintf(name,"TreeC_ITS_%d",fEvent);
+ TTree cTree(name,"ITS clusters V2");
+ TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
+ cTree.Branch("Clusters",&array);
+ delete array;
+
+ TClonesArray** clusters = new (TClonesArray*)[fNModules];
+ // one TClonesArray per module
+
+ AliITSRawStreamSPD inputSPD;
+ FindClustersSPD(&inputSPD, clusters);
+ AliITSRawStreamSDD inputSDD;
+ FindClustersSDD(&inputSDD, clusters);
+ AliITSRawStreamSSD inputSSD;
+ FindClustersSSD(&inputSSD, clusters);
+
+ // write all clusters to the tree
+ Int_t nClusters = 0;
+ for (Int_t iModule = 0; iModule < fNModules; iModule++) {
+ TClonesArray* array = clusters[iModule];
+ if (!array) {
+ Error("Digits2Clusters", "data for module %d missing!", iModule);
+ array = new TClonesArray("AliITSclusterV2");
+ }
+ cTree.SetBranchAddress("Clusters", &array);
+ cTree.Fill();
+ nClusters += array->GetEntriesFast();
+ delete array;
+ }
+ cTree.Write();
+
+ savedir->cd();
+
+ Info("Digits2Clusters", "total number of found clusters in ITS: %d\n",
+ nClusters);
+}
+
//**** Fast clusters *******************************
#include "TParticle.h"
//------------------------------------------------------------
// Actual SPD cluster finder
//------------------------------------------------------------
- const Int_t kMAXBIN=(fNzSPD+2)*(fNySPD+2);
+ Int_t kNzBins = fNzSPD + 2;
+ const Int_t kMAXBIN=kNzBins*(fNySPD+2);
Int_t ndigits=digits->GetEntriesFast();
AliBin *bins=new AliBin[kMAXBIN];
d=(AliITSdigitSPD*)digits->UncheckedAt(k);
Int_t i=d->GetCoord2()+1; //y
Int_t j=d->GetCoord1()+1;
- bins[i*fNzSPD+j].SetIndex(k);
- bins[i*fNzSPD+j].SetMask(1);
+ bins[i*kNzBins+j].SetIndex(k);
+ bins[i*kNzBins+j].SetMask(1);
}
Int_t n=0; TClonesArray &cl=*clusters;
for (k=0; k<kMAXBIN; k++) {
if (!bins[k].IsNotUsed()) continue;
Int_t ni=0, idx[200];
- FindCluster(k,fNzSPD,bins,ni,idx);
+ FindCluster(k,kNzBins,bins,ni,idx);
if (ni==200) {cerr<<"SPD: Too big cluster !\n"; continue;}
Int_t lab[4];
lp[4]= (zmax-zmin+1)*100 + (ymax-ymin+1);
//CheckLabels(lab);
+ d=(AliITSdigitSPD*)digits->UncheckedAt(idx[0]);
new (cl[n]) AliITSclusterV2(lab,lp); n++;
}
delete bins;
}
+void AliITSclustererV2::FindClustersSPD(AliITSRawStream* input,
+ TClonesArray** clusters)
+{
+ //------------------------------------------------------------
+ // Actual SPD cluster finder for raw data
+ //------------------------------------------------------------
+
+ Int_t nClustersSPD = 0;
+ Int_t kNzBins = fNzSPD + 2;
+ Int_t kNyBins = fNySPD + 2;
+ Int_t kMaxBin = kNzBins * kNyBins;
+ AliBin* bins = NULL;
+
+ // read raw data input stream
+ while (kTRUE) {
+ Bool_t next = input->Next();
+ if (!next || input->IsNewModule()) {
+ Int_t iModule = input->GetPrevModuleID();
+
+ // when all data from a module was read, search for clusters
+ if (bins) {
+ clusters[iModule] = new TClonesArray("AliITSclusterV2");
+ Int_t nClusters = 0;
+
+ for (Int_t iBin = 0; iBin < kMaxBin; iBin++) {
+ if (bins[iBin].IsUsed()) continue;
+ Int_t nBins = 0;
+ Int_t idxBins[200];
+ FindCluster(iBin, kNzBins, bins, nBins, idxBins);
+ if (nBins == 200) {
+ Error("FindClustersSPD", "SPD: Too big cluster !\n");
+ continue;
+ }
+
+ Int_t label[4];
+ label[0] = -2;
+ label[1] = -2;
+ label[2] = -2;
+// label[3] = iModule;
+ label[3] = fNdet[iModule];
+
+ Int_t ymin = (idxBins[0] / kNzBins) - 1;
+ Int_t ymax = ymin;
+ Int_t zmin = (idxBins[0] % kNzBins) - 1;
+ Int_t zmax = zmin;
+ Float_t y = 0.;
+ Float_t z = 0.;
+ Float_t q = 0.;
+ for (Int_t idx = 0; idx < nBins; idx++) {
+ Int_t iy = (idxBins[idx] / kNzBins) - 1;
+ Int_t iz = (idxBins[idx] % kNzBins) - 1;
+ if (ymin > iy) ymin = iy;
+ if (ymax < iy) ymax = iy;
+ if (zmin > iz) zmin = iz;
+ if (zmax < iz) zmax = iz;
+
+ Float_t qBin = bins[idxBins[idx]].GetQ();
+ y += qBin * fYSPD[iy];
+ z += qBin * fZSPD[iz];
+ q += qBin;
+ }
+ y /= q;
+ z /= q;
+ y -= fHwSPD;
+ z -= fHlSPD;
+
+ Float_t hit[5]; // y, z, sigma(y)^2, sigma(z)^2, charge
+ hit[0] = -y-fYshift[iModule];
+ if (iModule <= fLastSPD1) hit[0] = -hit[0];
+ hit[1] = z+fZshift[iModule];
+ hit[2] = fYpitchSPD*fYpitchSPD/12.;
+ hit[3] = fZ1pitchSPD*fZ1pitchSPD/12.;
+// hit[4] = q;
+ hit[4] = (zmax-zmin+1)*100 + (ymax-ymin+1);
+
+ //CheckLabels(label);
+ new (clusters[iModule]->AddrAt(nClusters))
+ AliITSclusterV2(label, hit);
+ nClusters++;
+ }
+
+ nClustersSPD += nClusters;
+ delete bins;
+ }
+
+ if (!next) break;
+ bins = new AliBin[kMaxBin];
+ }
+
+ // fill the current digit into the bins array
+ Int_t index = (input->GetCoord2()+1) * kNzBins + (input->GetCoord1()+1);
+ bins[index].SetIndex(index);
+ bins[index].SetMask(1);
+ bins[index].SetQ(1);
+ }
+
+ Info("FindClustersSPD", "found clusters in ITS SPD: %d", nClustersSPD);
+}
+
+
Bool_t AliITSclustererV2::IsMaximum(Int_t k,Int_t max,const AliBin *bins) {
//------------------------------------------------------------
//is this a local maximum ?
}
void AliITSclustererV2::
-FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
+FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
+ const TClonesArray *digits, TClonesArray *clusters) {
//------------------------------------------------------------
// Actual SDD cluster finder
//------------------------------------------------------------
- const Int_t kMAXBIN=(fNzSDD+2)*(fNySDD+2);
-
- AliBin *bins[2];
- bins[0]=new AliBin[kMAXBIN];
- bins[1]=new AliBin[kMAXBIN];
-
- AliITSdigitSDD *d=0;
- Int_t i, ndigits=digits->GetEntriesFast();
- for (i=0; i<ndigits; i++) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(i);
- Int_t y=d->GetCoord2()+1; //y
- Int_t z=d->GetCoord1()+1; //z
- Int_t q=d->GetSignal();
- if (z <= fNzSDD) {
- bins[0][y*fNzSDD+z].SetQ(q);
- bins[0][y*fNzSDD+z].SetMask(1);
- bins[0][y*fNzSDD+z].SetIndex(i);
- } else {
- z-=fNzSDD;
- bins[1][y*fNzSDD+z].SetQ(q);
- bins[1][y*fNzSDD+z].SetMask(1);
- bins[1][y*fNzSDD+z].SetIndex(i);
- }
- }
-
Int_t ncl=0; TClonesArray &cl=*clusters;
for (Int_t s=0; s<2; s++)
- for (i=0; i<kMAXBIN; i++) {
+ for (Int_t i=0; i<nMaxBin; i++) {
if (bins[s][i].IsUsed()) continue;
Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
- FindPeaks(i, fNzSDD, bins[s], idx, msk, npeaks);
+ FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
if (npeaks>30) continue;
if (idx[k] < 0) continue; //this peak is already removed
for (l=k+1; l<npeaks; l++) {
if (idx[l] < 0) continue; //this peak is already removed
- Int_t ki=idx[k]/fNzSDD, kj=idx[k] - ki*fNzSDD;
- Int_t li=idx[l]/fNzSDD, lj=idx[l] - li*fNzSDD;
+ Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
+ Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
Int_t di=TMath::Abs(ki - li);
Int_t dj=TMath::Abs(kj - lj);
if (di>1 || dj>1) continue;
}
for (k=0; k<npeaks; k++) {
- MarkPeak(TMath::Abs(idx[k]), fNzSDD, bins[s], msk[k]);
+ MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
}
for (k=0; k<npeaks; k++) {
if (idx[k] < 0) continue; //removed peak
AliITSclusterV2 c;
- MakeCluster(idx[k], fNzSDD, bins[s], msk[k], c);
+ MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
//if (c.GetQ() < 200) continue; //noise cluster
c.SetQ(q/20.); //to be consistent with the SSD charges
- AliBin *b=&bins[s][idx[k]];
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- Int_t l0=(d->GetTracks())[0];
- if (l0<0) {
- b=&bins[s][idx[k]-1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]+1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
+ if (digits) {
+ AliBin *b=&bins[s][idx[k]];
+ AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ Int_t l0=(d->GetTracks())[0];
+ if (l0<0) {
+ b=&bins[s][idx[k]-1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]+1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]-nzBins];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]+nzBins];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
}
- }
- if (l0<0) {
- b=&bins[s][idx[k]-fNzSDD];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]+fNzSDD];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]+fNzSDD+1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]+fNzSDD-1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]-fNzSDD+1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
- if (l0<0) {
- b=&bins[s][idx[k]-fNzSDD-1];
- if (b->GetQ()>0) {
- d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
- l0=(d->GetTracks())[0];
- }
- }
+ if (l0<0) {
+ b=&bins[s][idx[k]+nzBins+1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]+nzBins-1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]-nzBins+1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
+ if (l0<0) {
+ b=&bins[s][idx[k]-nzBins-1];
+ if (b->GetQ()>0) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
+ l0=(d->GetTracks())[0];
+ }
+ }
- {
- Int_t lab[3];
- lab[0]=(d->GetTracks())[0];
- lab[1]=(d->GetTracks())[1];
- lab[2]=(d->GetTracks())[2];
- //CheckLabels(lab);
- c.SetLabel(lab[0],0);
- c.SetLabel(lab[1],1);
- c.SetLabel(lab[2],2);
- }
+ {
+ Int_t lab[3];
+ lab[0]=(d->GetTracks())[0];
+ lab[1]=(d->GetTracks())[1];
+ lab[2]=(d->GetTracks())[2];
+ //CheckLabels(lab);
+ c.SetLabel(lab[0],0);
+ c.SetLabel(lab[1],1);
+ c.SetLabel(lab[2],2);
+ }
+ }
new (cl[ncl]) AliITSclusterV2(c); ncl++;
}
}
+}
+
+void AliITSclustererV2::
+FindClustersSDD(const TClonesArray *digits, TClonesArray *clusters) {
+ //------------------------------------------------------------
+ // Actual SDD cluster finder
+ //------------------------------------------------------------
+ Int_t kNzBins = fNzSDD + 2;
+ const Int_t kMAXBIN=kNzBins*(fNySDD+2);
+
+ AliBin *bins[2];
+ bins[0]=new AliBin[kMAXBIN];
+ bins[1]=new AliBin[kMAXBIN];
+
+ AliITSdigitSDD *d=0;
+ Int_t i, ndigits=digits->GetEntriesFast();
+ for (i=0; i<ndigits; i++) {
+ d=(AliITSdigitSDD*)digits->UncheckedAt(i);
+ Int_t y=d->GetCoord2()+1; //y
+ Int_t z=d->GetCoord1()+1; //z
+ Int_t q=d->GetSignal();
+ if (z <= fNzSDD) {
+ bins[0][y*kNzBins+z].SetQ(q);
+ bins[0][y*kNzBins+z].SetMask(1);
+ bins[0][y*kNzBins+z].SetIndex(i);
+ } else {
+ z-=fNzSDD;
+ bins[1][y*kNzBins+z].SetQ(q);
+ bins[1][y*kNzBins+z].SetMask(1);
+ bins[1][y*kNzBins+z].SetIndex(i);
+ }
+ }
+
+ FindClustersSDD(bins, kMAXBIN, kNzBins, digits, clusters);
delete[] bins[0];
delete[] bins[1];
}
+void AliITSclustererV2::FindClustersSDD(AliITSRawStream* input,
+ TClonesArray** clusters)
+{
+ //------------------------------------------------------------
+ // Actual SDD cluster finder for raw data
+ //------------------------------------------------------------
+ Int_t nClustersSDD = 0;
+ Int_t kNzBins = fNzSDD + 2;
+ Int_t kMaxBin = kNzBins * (fNySDD+2);
+ AliBin* bins[2] = {NULL, NULL};
+
+ // read raw data input stream
+ while (kTRUE) {
+ Bool_t next = input->Next();
+ if (!next || input->IsNewModule()) {
+ Int_t iModule = input->GetPrevModuleID();
+
+ // when all data from a module was read, search for clusters
+ if (bins[0]) {
+ clusters[iModule] = new TClonesArray("AliITSclusterV2");
+ fI = iModule;
+ FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
+ Int_t nClusters = clusters[iModule]->GetEntriesFast();
+ nClustersSDD += nClusters;
+ delete[] bins[0];
+ delete[] bins[1];
+ }
+
+ if (!next) break;
+ bins[0] = new AliBin[kMaxBin];
+ bins[1] = new AliBin[kMaxBin];
+ }
+
+ // fill the current digit into the bins array
+ Int_t iz = input->GetCoord1()+1;
+ Int_t side = ((iz <= fNzSDD) ? 0 : 1);
+ iz -= side*fNzSDD;
+ Int_t index = (input->GetCoord2()+1) * kNzBins + iz;
+ bins[side][index].SetQ(input->GetSignal());
+ bins[side][index].SetMask(1);
+ bins[side][index].SetIndex(index);
+ }
+
+ Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
+}
+
+void AliITSclustererV2::
+FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
+ Ali1Dcluster* pos, Int_t np,
+ TClonesArray *clusters) {
+ //------------------------------------------------------------
+ // Actual SSD cluster finder
+ //------------------------------------------------------------
+ TClonesArray &cl=*clusters;
+
+ Int_t lab[4]={-2,-2,-2,-2};
+ Float_t tanp=fTanP, tann=fTanN;
+ if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
+
+ Int_t idet=fNdet[fI];
+ Int_t ncl=0;
+ for (Int_t i=0; i<np; i++) {
+ //Float_t dq_min=1.e+33;
+ Float_t ybest=1000,zbest=1000,qbest=0;
+ Float_t yp=pos[i].GetY()*fYpitchSSD;
+ for (Int_t j=0; j<nn; j++) {
+ //if (pos[i].fTracks[0] != neg[j].fTracks[0]) continue;
+ Float_t yn=neg[j].GetY()*fYpitchSSD;
+ Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
+ Float_t yt=yn + tann*zt;
+ zt-=fHlSSD; yt-=fHwSSD;
+ if (TMath::Abs(yt)<fHwSSD+0.01)
+ if (TMath::Abs(zt)<fHlSSD+0.01) {
+ //if (TMath::Abs(pos[i].GetQ()-neg[j].GetQ())<dq_min) {
+ //dq_min=TMath::Abs(pos[i].GetQ()-neg[j].GetQ());
+ ybest=yt; zbest=zt;
+ qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
+
+ lab[0]=pos[i].GetLabel(0);
+ lab[1]=pos[i].GetLabel(1);
+ lab[2]=neg[i].GetLabel(0);
+ lab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
+ Float_t lp[5];
+ lp[0]=-ybest-fYshift[fI];
+ lp[1]= zbest+fZshift[fI];
+ lp[2]=0.0025*0.0025; //SigmaY2
+ lp[3]=0.110*0.110; //SigmaZ2
+ if (pos[i].GetNd()+neg[j].GetNd() > 4) {
+ lp[2]*=9;
+ lp[3]*=9;
+ }
+ lp[4]=qbest; //Q
+
+ //CheckLabels(lab);
+ new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
+ }
+ }
+ /*
+ if (ybest<100) {
+ lab[3]=idet;
+ Float_t lp[5];
+ lp[0]=-ybest-fYshift[fI];
+ lp[1]= zbest+fZshift[fI];
+ lp[2]=0.002*0.002; //SigmaY2
+ lp[3]=0.080*0.080; //SigmaZ2
+ lp[4]=qbest; //Q
+ //
+ new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
+ }
+ */
+ }
+}
+
void AliITSclustererV2::
FindClustersSSD(const TClonesArray *digits, TClonesArray *clusters) {
//------------------------------------------------------------
Float_t y=0., q=0., qmax=0.;
Int_t lab[4]={-2,-2,-2,-2};
- TClonesArray &cl=*clusters;
-
AliITSdigitSSD *d=(AliITSdigitSSD*)digits->UncheckedAt(0);
q += d->GetSignal();
y += d->GetCoord2()*d->GetSignal();
Int_t flag=d->GetCoord1();
Int_t *n=&nn;
Ali1Dcluster *c=neg;
- Int_t nd=0;
+ Int_t nd=1;
for (Int_t s=1; s<smax; s++) {
d=(AliITSdigitSSD*)digits->UncheckedAt(s);
Int_t strip=d->GetCoord2();
return;
}
- Float_t tanp=fTanP, tann=fTanN;
- if (fI>fLastSSD1) {tann=fTanP; tanp=fTanN;}
-
- Int_t idet=fNdet[fI];
- Int_t ncl=0;
- for (Int_t i=0; i<np; i++) {
- //Float_t dq_min=1.e+33;
- Float_t ybest=1000,zbest=1000,qbest=0;
- Float_t yp=pos[i].GetY()*fYpitchSSD;
- for (Int_t j=0; j<nn; j++) {
- //if (pos[i].fTracks[0] != neg[j].fTracks[0]) continue;
- Float_t yn=neg[j].GetY()*fYpitchSSD;
- Float_t zt=(2*fHlSSD*tanp + yp - yn)/(tann+tanp);
- Float_t yt=yn + tann*zt;
- zt-=fHlSSD; yt-=fHwSSD;
- if (TMath::Abs(yt)<fHwSSD+0.01)
- if (TMath::Abs(zt)<fHlSSD+0.01) {
- //if (TMath::Abs(pos[i].GetQ()-neg[j].GetQ())<dq_min) {
- //dq_min=TMath::Abs(pos[i].GetQ()-neg[j].GetQ());
- ybest=yt; zbest=zt;
- qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
-
- lab[0]=pos[i].GetLabel(0);
- lab[1]=pos[i].GetLabel(1);
- lab[2]=neg[i].GetLabel(0);
- lab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
- Float_t lp[5];
- lp[0]=-ybest-fYshift[fI];
- lp[1]= zbest+fZshift[fI];
- lp[2]=0.0025*0.0025; //SigmaY2
- lp[3]=0.110*0.110; //SigmaZ2
- if (pos[i].GetNd()+neg[j].GetNd() > 4) {
- lp[2]*=9;
- lp[3]*=9;
- }
- lp[4]=qbest; //Q
+ FindClustersSSD(neg, nn, pos, np, clusters);
+}
- //CheckLabels(lab);
- new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
+void AliITSclustererV2::FindClustersSSD(AliITSRawStream* input,
+ TClonesArray** clusters)
+{
+ //------------------------------------------------------------
+ // Actual SSD cluster finder for raw data
+ //------------------------------------------------------------
+ Int_t nClustersSSD = 0;
+ const Int_t MAX = 1000;
+ Ali1Dcluster clusters1D[2][MAX];
+ Int_t nClusters[2] = {0, 0};
+ Float_t q = 0.;
+ Float_t y = 0.;
+ Int_t nDigits = 0;
+ Int_t prevStrip = -1;
+ Int_t prevFlag = -1;
+
+ // read raw data input stream
+ while (kTRUE) {
+ Bool_t next = input->Next();
+
+ // check if a new cluster starts
+ Int_t strip = input->GetCoord2();
+ Int_t flag = input->GetCoord1();
+ if ((!next || input->IsNewModule() ||
+ (strip-prevStrip > 1) || (flag != prevFlag)) &&
+ (nDigits > 0)) {
+ if (nClusters[prevFlag] == MAX) {
+ Error("FindClustersSSD", "Too many 1D clusters !");
+ return;
+ }
+ Ali1Dcluster& cluster = clusters1D[prevFlag][nClusters[prevFlag]++];
+ cluster.SetY(y/q);
+ cluster.SetQ(q);
+ cluster.SetNd(nDigits);
+
+ //Split suspiciously big cluster
+ if (nDigits > 3) {
+ cluster.SetY(y/q - 0.5*nDigits);
+ cluster.SetQ(0.5*q);
+ if (nClusters[prevFlag] == MAX) {
+ Error("FindClustersSSD", "Too many 1D clusters !");
+ return;
+ }
+ Ali1Dcluster& cluster2 = clusters1D[prevFlag][nClusters[prevFlag]++];
+ cluster2.SetY(y/q + 0.5*nDigits);
+ cluster2.SetQ(0.5*q);
+ cluster2.SetNd(nDigits);
}
+ y = q = 0.;
+ nDigits = 0;
}
- /*
- if (ybest<100) {
- lab[3]=idet;
- Float_t lp[5];
- lp[0]=-ybest-fYshift[fI];
- lp[1]= zbest+fZshift[fI];
- lp[2]=0.002*0.002; //SigmaY2
- lp[3]=0.080*0.080; //SigmaZ2
- lp[4]=qbest; //Q
- //
- new (cl[ncl]) AliITSclusterV2(lab,lp); ncl++;
+
+ if (!next || input->IsNewModule()) {
+ Int_t iModule = input->GetPrevModuleID();
+
+ // when all data from a module was read, search for clusters
+ if (prevFlag >= 0) {
+ clusters[iModule] = new TClonesArray("AliITSclusterV2");
+ fI = iModule;
+ FindClustersSSD(&clusters1D[0][0], nClusters[0],
+ &clusters1D[1][0], nClusters[1], clusters[iModule]);
+ Int_t nClusters = clusters[iModule]->GetEntriesFast();
+ nClustersSSD += nClusters;
+ }
+
+ if (!next) break;
+ nClusters[0] = nClusters[1] = 0;
+ y = q = 0.;
+ nDigits = 0;
}
- */
+
+ // add digit to current cluster
+ q += input->GetSignal();
+ y += strip * input->GetSignal();
+ nDigits++;
+ prevStrip = strip;
+ prevFlag = flag;
}
+
+ Info("FindClustersSSD", "found clusters in ITS SSD: %d", nClustersSSD);
}
#else //V1