// p-p collisions
////////////////////////////////////////////////////////////////
-const Int_t AliITSVertexer3D::fgkMaxNumOfClDefault = 500;
+const Int_t AliITSVertexer3D::fgkMaxNumOfClDefault = 300;
+const Int_t AliITSVertexer3D::fgkMaxNumOfClRebinDefault = 500;
+const Int_t AliITSVertexer3D::fgkMaxNumOfClDownscaleDefault = 1000;
+const Float_t AliITSVertexer3D::fgk3DBinSizeDefault = 0.1;
ClassImp(AliITSVertexer3D)
/* $Id$ */
//______________________________________________________________________
-AliITSVertexer3D::AliITSVertexer3D():
+AliITSVertexer3D::AliITSVertexer3D(Double_t zcut):
AliITSVertexer(),
fLines("AliStrLine",1000),
fVert3D(),
fBinSizeZ(0.),
fPileupAlgo(0),
fMaxNumOfCl(fgkMaxNumOfClDefault),
+ fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault),
+ fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault),
+ fNRecPLay1(0),
+ fNRecPLay2(0),
+ f3DBinSize(fgk3DBinSizeDefault),
fDoDownScale(kFALSE),
- fGenerForDownScale(0)
+ fGenerForDownScale(0),
+ f3DPeak(),
+ fHighMultAlgo(1),
+ fSwitchAlgorithm(kFALSE)
{
// Default constructor
SetCoarseDiffPhiCut();
SetCoarseMaxRCut();
SetMaxRCut();
SetMaxRCutAlgo2();
- SetZCutDiamond();
+ if(zcut>0.){
+ SetZCutDiamond(zcut);
+ }
+ else {
+ SetZCutDiamond();
+ }
SetMaxZCut();
SetDCACut();
SetDiffPhiMax();
SetPileupAlgo();
SetBinSizeR();
SetBinSizeZ();
- Double_t binsize=0.02; // default 200 micron
- Int_t nbins=static_cast<Int_t>(1+2*fZCutDiamond/binsize);
- fZHisto=new TH1F("hz","",nbins,-fZCutDiamond,-fZCutDiamond+binsize*nbins);
fGenerForDownScale=new TRandom3(987654321);
}
+//______________________________________________________________________
+AliITSVertexer3D::AliITSVertexer3D(TRootIOCtor*):
+ AliITSVertexer(),
+ fLines("AliStrLine",1000),
+ fVert3D(),
+ fCoarseDiffPhiCut(0.),
+ fFineDiffPhiCut(0.),
+ fCutOnPairs(0.),
+ fCoarseMaxRCut(0.),
+ fMaxRCut(0.),
+ fMaxRCut2(0.),
+ fZCutDiamond(0.),
+ fMaxZCut(0.),
+ fDCAcut(0.),
+ fDiffPhiMax(0.),
+ fMeanPSelTrk(0.),
+ fMeanPtSelTrk(0.),
+ fUsedCluster(kMaxCluPerMod*kNSPDMod),
+ fZHisto(0),
+ fDCAforPileup(0.),
+ fDiffPhiforPileup(0.),
+ fBinSizeR(0.),
+ fBinSizeZ(0.),
+ fPileupAlgo(0),
+ fMaxNumOfCl(fgkMaxNumOfClDefault),
+ fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault),
+ fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault),
+ fNRecPLay1(0),
+ fNRecPLay2(0),
+ f3DBinSize(fgk3DBinSizeDefault),
+ fDoDownScale(kFALSE),
+ fGenerForDownScale(0),
+ f3DPeak(),
+ fHighMultAlgo(1),
+ fSwitchAlgorithm(kFALSE)
+{
+ // I/O constructor
+
+
+}
+
//______________________________________________________________________
AliITSVertexer3D::~AliITSVertexer3D() {
// Destructor
//______________________________________________________________________
void AliITSVertexer3D::ResetVert3D(){
- //
+ // Reset the fVert3D object and reset the used clusters
ResetVertex();
fVert3D.SetXv(0.);
fVert3D.SetYv(0.);
Int_t nolines = FindTracklets(itsClusterTree,0);
Int_t rc;
if(nolines>=2){
- rc=Prepare3DVertex(0);
- if(fVert3D.GetNContributors()>0){
- fLines.Clear("C");
- nolines = FindTracklets(itsClusterTree,1);
- if(nolines>=2){
- rc=Prepare3DVertex(1);
- if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative();
- else if(fPileupAlgo!=2 && rc == 0) FindVertex3D(itsClusterTree);
- if(rc!=0) fVert3D.SetNContributors(0); // exclude this vertex
+ if(fSwitchAlgorithm) {
+ rc = Prepare3DVertexPbPb();
+ FindVertex3D(itsClusterTree);
+ } else {
+ rc=Prepare3DVertex(0);
+ if(fVert3D.GetNContributors()>0){
+ fLines.Clear("C");
+ nolines = FindTracklets(itsClusterTree,1);
+ if(nolines>=2){
+ rc=Prepare3DVertex(1);
+ if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative();
+ else if(fPileupAlgo!=2 && rc == 0) FindVertex3D(itsClusterTree);
+ if(rc!=0) fVert3D.SetNContributors(0); // exclude this vertex
+ }
}
}
}
vertz.SetHighLimit(fZCutDiamond);
AliESDVertex* vtxz = vertz.FindVertexForCurrentEvent(itsClusterTree);
if(vtxz){
- Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],vtxz->GetZv()};
+ Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],vtxz->GetZ()};
Double_t covmatrix[6];
vtxz->GetCovMatrix(covmatrix);
Double_t chi2=99999.;
//______________________________________________________________________
void AliITSVertexer3D::FindVertex3D(TTree *itsClusterTree){
-
- Double_t vRadius=TMath::Sqrt(fVert3D.GetXv()*fVert3D.GetXv()+fVert3D.GetYv()*fVert3D.GetYv());
+ // Instantiates the fCurrentVertex object. calle by FindVertexForCurrenEvent
+ Double_t vRadius=TMath::Sqrt(fVert3D.GetX()*fVert3D.GetX()+fVert3D.GetY()*fVert3D.GetY());
if(vRadius<GetPipeRadius() && fVert3D.GetNContributors()>0){
- Double_t position[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()};
+ Double_t position[3]={fVert3D.GetX(),fVert3D.GetY(),fVert3D.GetZ()};
Double_t covmatrix[6];
fVert3D.GetCovMatrix(covmatrix);
Double_t chi2=99999.;
default: AliError("Wrong pileup algorithm"); break;
}
if(fNoVertices==1){
+ delete[] fVertArray;
fVertArray = new AliESDVertex[1];
fVertArray[0]=(*fCurrentVertex);
}
//______________________________________________________________________
void AliITSVertexer3D::FindVertex3DIterative(){
- //
+ // find vertex if fPileupAlgo == 2
Int_t nLines=fLines.GetEntriesFast();
Int_t maxPoints=nLines*(nLines-1)/2;
Double_t* zP=new Double_t[maxPoints];
Int_t* index1=new Int_t[maxPoints];
Int_t* index2=new Int_t[maxPoints];
- Double_t xbeam=fVert3D.GetXv();
- Double_t ybeam=fVert3D.GetYv();
+ Double_t xbeam=fVert3D.GetX();
+ Double_t ybeam=fVert3D.GetY();
Int_t iPoint=0;
for(Int_t ilin1=0; ilin1<nLines; ilin1++){
if(nGoodVert > 1){
fIsPileup = kTRUE;
fNTrpuv = fVertArray[1].GetNContributors();
- fZpuv = fVertArray[1].GetZv();
+ fZpuv = fVertArray[1].GetZ();
}
- Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv());
+ Double_t vRadius=TMath::Sqrt(fVertArray[0].GetX()*fVertArray[0].GetX()+fVertArray[0].GetY()*fVertArray[0].GetY());
if(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>0){
- Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()};
+ Double_t position[3]={fVertArray[0].GetX(),fVertArray[0].GetY(),fVertArray[0].GetZ()};
Double_t covmatrix[6];
fVertArray[0].GetCovMatrix(covmatrix);
Double_t chi2=99999.;
// at least one second vertex is present
fIsPileup = kTRUE;
fNTrpuv = fVertArray[kk].GetNContributors();
- fZpuv = fVertArray[kk].GetZv();
+ fZpuv = fVertArray[kk].GetZ();
}
}
- Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv());
+ Double_t vRadius=TMath::Sqrt(fVertArray[0].GetX()*fVertArray[0].GetX()+fVertArray[0].GetY()*fVertArray[0].GetY());
if(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>0){
- Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()};
+ Double_t position[3]={fVertArray[0].GetX(),fVertArray[0].GetY(),fVertArray[0].GetZ()};
Double_t covmatrix[6];
fVertArray[0].GetCovMatrix(covmatrix);
Double_t chi2=99999.;
TClonesArray *itsRec = 0;
if(optCuts==0) fZHisto->Reset();
- // gc1 are local and global coordinates for layer 1
+ // gc1 are local and global coordinates for layer 1
Float_t gc1f[3]={0.,0.,0.};
Double_t gc1[3]={0.,0.,0.};
// gc2 are local and global coordinates for layer 2
Float_t gc2f[3]={0.,0.,0.};
Double_t gc2[3]={0.,0.,0.};
AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
- itsRec=rpcont->FetchClusters(0,itsClusterTree);
+ rpcont->FetchClusters(0,itsClusterTree);
if(!rpcont->IsSPDActive()){
AliWarning("No SPD rec points found, 3D vertex not calculated");
return -1;
Double_t deltaR=fCoarseMaxRCut;
Double_t dZmax=fZCutDiamond;
if(optCuts==1){
- xbeam=fVert3D.GetXv();
- ybeam=fVert3D.GetYv();
- zvert=fVert3D.GetZv();
+ xbeam=fVert3D.GetX();
+ ybeam=fVert3D.GetY();
+ zvert=fVert3D.GetZ();
deltaPhi = fDiffPhiMax;
deltaR=fMaxRCut;
dZmax=fMaxZCut;
deltaR=fMaxRCut2;
}
} else if(optCuts==2){
- xbeam=fVert3D.GetXv();
- ybeam=fVert3D.GetYv();
+ xbeam=fVert3D.GetX();
+ ybeam=fVert3D.GetY();
deltaPhi = fDiffPhiforPileup;
deltaR=fMaxRCut;
}
- Int_t nrpL1 = 0; // number of rec points on layer 1
- Int_t nrpL2 = 0; // number of rec points on layer 2
- nrpL1=rpcont->GetNClustersInLayerFast(1);
- nrpL2=rpcont->GetNClustersInLayerFast(2);
- if(nrpL1 == 0 || nrpL2 == 0){
- AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",nrpL1,nrpL2));
+ fNRecPLay1=rpcont->GetNClustersInLayerFast(1);
+ fNRecPLay2=rpcont->GetNClustersInLayerFast(2);
+ if(fNRecPLay1 == 0 || fNRecPLay2 == 0){
+ AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",fNRecPLay1,fNRecPLay2));
return -1;
}
- AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",nrpL1,nrpL2));
+ AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",fNRecPLay1,fNRecPLay2));
fDoDownScale=kFALSE;
+ fSwitchAlgorithm=kFALSE;
+
Float_t factDownScal=1.;
Int_t origLaddersOnLayer2=fLadOnLay2;
- if(nrpL1>fMaxNumOfCl || nrpL2>fMaxNumOfCl){
- SetLaddersOnLayer2(2);
- fDoDownScale=kTRUE;
- factDownScal=(Float_t)fMaxNumOfCl*(Float_t)fMaxNumOfCl/(Float_t)nrpL1/(Float_t)nrpL2;
- if(optCuts==1){
- factDownScal*=(fCoarseDiffPhiCut/fDiffPhiMax)*10;
- if(factDownScal>1.){
- fDoDownScale=kFALSE;
- SetLaddersOnLayer2(origLaddersOnLayer2);
+ switch(fHighMultAlgo){
+ case 0:
+ if(fNRecPLay1>fMaxNumOfClForDownScale || fNRecPLay2>fMaxNumOfClForDownScale){
+ if(optCuts==2) return -1; // do not try to search for pileup
+ SetLaddersOnLayer2(2);
+ fDoDownScale=kTRUE;
+ factDownScal=(Float_t)fMaxNumOfClForDownScale*(Float_t)fMaxNumOfClForDownScale/(Float_t)fNRecPLay1/(Float_t)fNRecPLay2;
+ if(optCuts==1){
+ factDownScal*=(fCoarseDiffPhiCut/fDiffPhiMax)*10;
+ if(factDownScal>1.){
+ fDoDownScale=kFALSE;
+ SetLaddersOnLayer2(origLaddersOnLayer2);
+ }
}
+ if(fDoDownScale)AliDebug(1,Form("Too many recpoints on SPD(%d %d ), downscale by %f",fNRecPLay1,fNRecPLay2,factDownScal));
+ }
+ break;
+ case 1:
+ if(fNRecPLay1>fMaxNumOfCl || fNRecPLay2>fMaxNumOfCl) {
+ if(optCuts==2) return -1; // do not try to search for pileup
+ fSwitchAlgorithm=kTRUE;
+ }
+ break;
+ default: break; // no pileup algo
+ }
+
+ if(!fDoDownScale && !fSwitchAlgorithm){
+ if(fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin){
+ SetLaddersOnLayer2(2);
}
- else if(optCuts==2) return -1;
- if(fDoDownScale)AliDebug(1,Form("Too many recpoints on SPD(%d %d ), downscale by %f",nrpL1,nrpL2,factDownScal));
}
Double_t a[3]={xbeam,ybeam,0.};
Int_t nolines = 0;
// Loop on modules of layer 1
- Int_t firstL1 = AliITSgeomTGeo::GetModuleIndex(1,1,1);
+ Int_t firstL1 = TMath::Max(0,AliITSgeomTGeo::GetModuleIndex(1,1,1));
Int_t lastL1 = AliITSgeomTGeo::GetModuleIndex(2,1,1)-1;
for(Int_t modul1= firstL1; modul1<=lastL1;modul1++){ // Loop on modules of layer 1
if(!fUseModule[modul1]) continue;
if(j>kMaxCluPerMod) continue;
UShort_t idClu1=modul1*kMaxCluPerMod+j;
if(fUsedCluster.TestBitNumber(idClu1)) continue;
- if(fDoDownScale && fGenerForDownScale->Rndm()>factDownScal) continue;
+ if(fDoDownScale && !fSwitchAlgorithm){
+ if(fGenerForDownScale->Rndm()>factDownScal) continue;
+ }
AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1->At(j);
recp1->GetGlobalXYZ(gc1f);
for(Int_t ico=0;ico<3;ico++)gc1[ico]=gc1f[ico];
Int_t ladmod=fLadders[ladder-1]+ladl2;
if(ladmod>AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2);
Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1);
+ if(modul2<0)continue;
if(!fUseModule[modul2]) continue;
itsRec=rpcont->UncheckedGetClusters(modul2);
Int_t nrecp2 = itsRec->GetEntries();
}
}
- if(fDoDownScale){
- SetLaddersOnLayer2(origLaddersOnLayer2);
- }
-
+ SetLaddersOnLayer2(origLaddersOnLayer2);
if(nolines == 0)return -2;
return nolines;
Int_t AliITSVertexer3D::Prepare3DVertex(Int_t optCuts){
// Finds the 3D vertex information using tracklets
Int_t retcode = -1;
-
Double_t xbeam=GetNominalPos()[0];
Double_t ybeam=GetNominalPos()[1];
Double_t zvert=0.;
Double_t deltaR=fCoarseMaxRCut;
Double_t dZmax=fZCutDiamond;
if(optCuts==1){
- xbeam=fVert3D.GetXv();
- ybeam=fVert3D.GetYv();
- zvert=fVert3D.GetZv();
+ xbeam=fVert3D.GetX();
+ ybeam=fVert3D.GetY();
+ zvert=fVert3D.GetZ();
deltaR=fMaxRCut;
dZmax=fMaxZCut;
if(fPileupAlgo == 2){
deltaR=fMaxRCut2;
}
}else if(optCuts==2){
- xbeam=fVert3D.GetXv();
- ybeam=fVert3D.GetYv();
+ xbeam=fVert3D.GetX();
+ ybeam=fVert3D.GetY();
deltaR=fMaxRCut;
}
Double_t origBinSizeR=fBinSizeR;
Double_t origBinSizeZ=fBinSizeZ;
+ Bool_t rebinned=kFALSE;
if(fDoDownScale){
SetBinSizeR(0.05);
SetBinSizeZ(0.05);
+ rebinned=kTRUE;
+ }else{
+ if(optCuts==0 && (fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin)){
+ SetBinSizeR(0.1);
+ SetBinSizeZ(0.2);
+ rebinned=kTRUE;
+ }
}
-
Double_t rl=-fCoarseMaxRCut;
Double_t rh=fCoarseMaxRCut;
Double_t zl=-fZCutDiamond;
TH3F *h3dcs = new TH3F("h3dcs","xyz distribution",nbrcs,rl,rh,nbrcs,rl,rh,nbzcs,zl,zh);
// cleanup of the TCLonesArray of tracklets (i.e. fakes are removed)
- Int_t *validate = new Int_t [fLines.GetEntriesFast()];
- for(Int_t i=0; i<fLines.GetEntriesFast();i++)validate[i]=0;
- for(Int_t i=0; i<fLines.GetEntriesFast()-1;i++){
+ Int_t vsiz = fLines.GetEntriesFast();
+ Int_t *validate = new Int_t [vsiz];
+ for(Int_t i=0; i<vsiz;i++)validate[i]=0;
+ for(Int_t i=0; i<vsiz-1;i++){
AliStrLine *l1 = (AliStrLine*)fLines.At(i);
for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){
AliStrLine *l2 = (AliStrLine*)fLines.At(j);
Int_t retc = l1->Cross(l2,point);
if(retc<0)continue;
Double_t deltaZ=point[2]-zvert;
- if(TMath::Abs(deltaZ)>dZmax)continue;
+ if(TMath::Abs(deltaZ)>dZmax)continue;
Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]);
if(rad>fCoarseMaxRCut)continue;
Double_t deltaX=point[0]-xbeam;
}
}
-
-
Int_t numbtracklets=0;
- for(Int_t i=0; i<fLines.GetEntriesFast();i++)if(validate[i]>=1)numbtracklets++;
+ for(Int_t i=0; i<vsiz;i++)if(validate[i]>=1)numbtracklets++;
if(numbtracklets<2){
delete [] validate;
delete h3d;
delete h3dcs;
+ SetBinSizeR(origBinSizeR);
+ SetBinSizeZ(origBinSizeZ);
return retcode;
}
if(fPileupAlgo == 2 && optCuts==1){
delete h3d;
delete h3dcs;
+ SetBinSizeR(origBinSizeR);
+ SetBinSizeZ(origBinSizeZ);
return 0;
}
FindPeaks(h3dcs,peak,ntrkl,ntimes);
binsizer=(rh-rl)/nbrcs;
binsizez=(zh-zl)/nbzcs;
- if(ntrkl==1 || ntimes>1){delete h3dcs; return retcode;}
+ if(ntrkl==1 || ntimes>1){
+ delete h3dcs;
+ SetBinSizeR(origBinSizeR);
+ SetBinSizeZ(origBinSizeZ);
+ return retcode;
+ }
}
delete h3dcs;
+ Double_t bs=(binsizer+binsizez)/2.;
+ for(Int_t i=0; i<fLines.GetEntriesFast();i++){
+ AliStrLine *l1 = (AliStrLine*)fLines.At(i);
+ if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i);
+ }
+ fLines.Compress();
+ AliDebug(1,Form("Number of tracklets (after 2nd compression) %d",fLines.GetEntriesFast()));
+
// Finer Histo in limited range in case of high mult.
- if(fDoDownScale){
+ if(rebinned){
SetBinSizeR(0.01);
SetBinSizeZ(0.01);
Double_t xl=peak[0]-0.3;
AliStrLine *l1 = (AliStrLine*)fLines.At(i);
for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){
AliStrLine *l2 = (AliStrLine*)fLines.At(j);
+ Double_t dca=l1->GetDCA(l2);
+ if(dca > fDCAcut || dca<0.00001) continue;
Double_t point[3];
Int_t retc = l1->Cross(l2,point);
if(retc<0)continue;
+ Double_t deltaZ=point[2]-zvert;
+ if(TMath::Abs(deltaZ)>dZmax)continue;
+ Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]);
+ if(rad>fCoarseMaxRCut)continue;
+ Double_t deltaX=point[0]-xbeam;
+ Double_t deltaY=point[1]-ybeam;
+ Double_t raddist=TMath::Sqrt(deltaX*deltaX+deltaY*deltaY);
+ if(raddist>deltaR)continue;
h3dfs->Fill(point[0],point[1],point[2]);
}
}
binsizez=fBinSizeZ;
}
delete h3dfs;
- SetBinSizeR(origBinSizeR);
- SetBinSizeZ(origBinSizeZ);
+ bs=(binsizer+binsizez)/2.;
+ for(Int_t i=0; i<fLines.GetEntriesFast();i++){
+ AliStrLine *l1 = (AliStrLine*)fLines.At(i);
+ if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i);
+ }
+ fLines.Compress();
+ AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast()));
}
+ SetBinSizeR(origBinSizeR);
+ SetBinSizeZ(origBinSizeZ);
// Second selection loop
- Double_t bs=(binsizer+binsizez)/2.;
- for(Int_t i=0; i<fLines.GetEntriesFast();i++){
- AliStrLine *l1 = (AliStrLine*)fLines.At(i);
- if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i);
- }
- fLines.Compress();
- AliDebug(1,Form("Number of tracklets (after 2nd compression) %d",fLines.GetEntriesFast()));
if(fLines.GetEntriesFast()>1){
retcode=0;
return retcode;
}
+//________________________________________________________
+Int_t AliITSVertexer3D::Prepare3DVertexPbPb(){
+ // Finds the 3D vertex information in Pb-Pb events using tracklets
+ AliDebug(1,"High multiplicity event.\n");
+
+ Int_t nxy=(Int_t)(2.*fCoarseMaxRCut/f3DBinSize);
+ Double_t xymi= -nxy*f3DBinSize/2.;
+ Double_t xyma= nxy*f3DBinSize/2.;
+ Int_t nz=(Int_t)(2.*fZCutDiamond/f3DBinSize);
+ Double_t zmi=-nz*f3DBinSize/2.;
+ Double_t zma=nz*f3DBinSize/2.;
+ Int_t nolines=fLines.GetEntriesFast();
+ TH3F *h3dv = new TH3F("h3dv","3d tracklets",nxy,xymi,xyma,nxy,xymi,xyma,nz,zmi,zma);
+
+ for(Int_t itra=0; itra<nolines; itra++){
+ Double_t wei = GetFraction(itra);
+ //printf("tracklet %d ) - weight %f \n",itra,wei);
+ if(wei>1.e-6){
+ AliStrLine *str=(AliStrLine*)fLines.At(itra);
+ Double_t t1,t2;
+ if(str->GetParamAtRadius(fCoarseMaxRCut,t1,t2)){
+ do{
+ Double_t punt[3];
+ str->ComputePointAtT(t1,punt);
+ h3dv->Fill(punt[0],punt[1],punt[2],wei);
+ t1+=f3DBinSize/3.;
+ } while(t1<t2);
+ }
+ }
+ }
+ Int_t noftrk,noftim;
+ FindPeaks(h3dv,f3DPeak,noftrk,noftim); // arg: histo3d, peak, # of contrib., # of other peak with same magnitude
+
+
+ // Remove all the tracklets which are not passing near peak
+
+ while(nolines--){
+ AliStrLine *str=(AliStrLine*)fLines.At(nolines);
+ Double_t dist = str->GetDistFromPoint(f3DPeak);
+ if(dist>(2.*f3DBinSize)) fLines.RemoveAt(nolines);
+ }
+ fLines.Compress();
+ nolines=fLines.GetEntriesFast();
+
+ delete h3dv;
+
+ Int_t *validate2 = new Int_t [fLines.GetEntriesFast()];
+ for(Int_t i=0; i<fLines.GetEntriesFast();i++) validate2[i]=1;
+ for(Int_t i=0; i<fLines.GetEntriesFast();i++){
+ if(validate2[i]==0) continue;
+ AliStrLine *l1 = (AliStrLine*)fLines.At(i);
+ if(l1->GetDistFromPoint(f3DPeak)> fDCAcut)fLines.RemoveAt(i);
+ for(Int_t j=i+1; j<fLines.GetEntriesFast();j++){
+ AliStrLine *l2 = (AliStrLine*)fLines.At(j);
+ if(l1->GetDCA(l2)<0.00001){
+ Int_t delta1=(Int_t)l1->GetIdPoint(0)-(Int_t)l2->GetIdPoint(0);
+ Int_t delta2=(Int_t)l1->GetIdPoint(1)-(Int_t)l2->GetIdPoint(1);
+ Int_t deltamod1=(Int_t)l1->GetIdPoint(0)/kMaxCluPerMod
+ -(Int_t)l2->GetIdPoint(0)/kMaxCluPerMod;
+ Int_t deltamod2=(Int_t)l1->GetIdPoint(1)/kMaxCluPerMod
+ -(Int_t)l2->GetIdPoint(1)/kMaxCluPerMod;
+ // remove tracklets sharing a point
+ if( (delta1==0 && deltamod2==0) ||
+ (delta2==0 && deltamod1==0) ) validate2[j]=0;
+
+ }
+ }
+ }
+ for(Int_t i=0; i<fLines.GetEntriesFast();i++){
+ if(validate2[i]==0) fLines.RemoveAt(i);
+ }
+
+ delete [] validate2;
+ fLines.Compress();
+
+
+ AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast()));
+
+ fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0);
+ fVert3D.GetXYZ(f3DPeak);
+
+ return 0;
+}
+
//________________________________________________________
void AliITSVertexer3D::SetMeanPPtSelTracks(Double_t fieldTesla){
// Sets mean values of Pt based on the field
}
}
+//________________________________________________________
+void AliITSVertexer3D::SetZCutDiamond(Double_t zcut){
+ // The fiducial region along Z is set. The TH1 object pointed by
+ // fZHisto is created
+ if(TMath::AreEqualAbs(zcut,fZCutDiamond,1.e-10))return;
+ fZCutDiamond=zcut;
+ if(fZHisto) delete fZHisto;
+ Double_t binsize=0.02; // default 200 micron
+ Int_t nbins=static_cast<Int_t>(1+2*fZCutDiamond/binsize);
+ fZHisto=new TH1F("hz","",nbins,-fZCutDiamond,-fZCutDiamond+binsize*nbins);
+ fZHisto->SetDirectory(0);
+}
+
//________________________________________________________
void AliITSVertexer3D::FindPeaks(TH3F* histo, Double_t *peak, Int_t &nOfTracklets, Int_t &nOfTimes){
// Finds bin with max contents in 3D histo of tracket intersections
//________________________________________________________
Int_t AliITSVertexer3D::RemoveTracklets(){
// Remove trackelts close to first found vertex
- Double_t vert[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()};
+ Double_t vert[3]={fVert3D.GetX(),fVert3D.GetY(),fVert3D.GetZ()};
Int_t nRemoved=0;
for(Int_t i=0; i<fLines.GetEntriesFast();i++){
AliStrLine *lin = (AliStrLine*)fLines.At(i);
//________________________________________________________
void AliITSVertexer3D::FindOther3DVertices(TTree *itsClusterTree){
// pileup identification based on 3D vertexing with not used clusters
- MarkUsedClusters();
- fLines.Clear("C");
- Int_t nolines = FindTracklets(itsClusterTree,2);
- if(nolines>=2){
- Int_t nr=RemoveTracklets();
- nolines-=nr;
+
+ fVertArray = new AliESDVertex[kMaxPileupVertices+1];
+ fVertArray[0]=(*fCurrentVertex);
+ Int_t nFoundVert=1;
+ for(Int_t iPilV=1; iPilV<=kMaxPileupVertices; iPilV++){
+ MarkUsedClusters();
+ fLines.Clear("C");
+ Int_t nolines = FindTracklets(itsClusterTree,2);
if(nolines>=2){
- Int_t rc=Prepare3DVertex(2);
- if(rc==0){
- fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0);
- if(fVert3D.GetNContributors()>=fMinTrackletsForPilup){
- fIsPileup=kTRUE;
- fNoVertices=2;
- fVertArray = new AliESDVertex[2];
- fVertArray[0]=(*fCurrentVertex);
- fVertArray[1]=fVert3D;
- fZpuv=fVert3D.GetZv();
- fNTrpuv=fVert3D.GetNContributors();
+ Int_t nr=RemoveTracklets();
+ nolines-=nr;
+ if(nolines>=2){
+ Int_t rc=Prepare3DVertex(2);
+ if(rc==0){
+ fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0);
+ if(fVert3D.GetNContributors()>=fMinTrackletsForPilup){
+ fIsPileup=kTRUE;
+ fVertArray[nFoundVert]=fVert3D;
+ nFoundVert++;
+ if(nFoundVert==2){
+ fZpuv=fVert3D.GetZ();
+ fNTrpuv=fVert3D.GetNContributors();
+ }
+ }
}
}
}
}
+ fNoVertices=nFoundVert;
}
//______________________________________________________________________
void AliITSVertexer3D::PileupFromZ(){
}
}
}
+
+//________________________________________________________
+Double_t AliITSVertexer3D::GetFraction(Int_t itr) const {
+ // this method is used to fill a 3D histogram representing
+ // the trajectories of the candidate tracklets
+ // The computed fraction is used as a weight at filling time
+ AliStrLine *str = (AliStrLine*)fLines.At(itr);
+ Double_t spigolo=10.;
+ Double_t cd[3];
+ str->GetCd(cd);
+ Double_t par=0.;
+ Double_t maxl=TMath::Sqrt(3.)*spigolo;
+ // intersection with a plane normal to the X axis
+ if(TMath::AreEqualAbs(cd[0],0.,1.e-9)){
+ par=1000000.;
+ }
+ else {
+ par=spigolo/cd[0];
+ }
+ Double_t zc=cd[2]*par;
+ Double_t yc=cd[1]*par;
+ if((-spigolo<=yc && yc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl);
+ // intersection with a plane normal to the Y axis
+ if(TMath::AreEqualAbs(cd[1],0.,1.e-9)){
+ par=1000000.;
+ }
+ else {
+ par=spigolo/cd[1];
+ }
+ zc=cd[2]*par;
+ Double_t xc=cd[0]*par;
+ if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl);
+ // intersection with a plane normal to the Z axis
+ if(TMath::AreEqualAbs(cd[2],0.,1.e-9)){
+ par=1000000.;
+ }
+ else {
+ par=spigolo/cd[2];
+ }
+ yc=cd[1]*par;
+ xc=cd[0]*par;
+ if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=yc && yc<=spigolo))return TMath::Abs(par/maxl);
+ // control should never reach the following lines
+ AliError(Form("anomalous tracklet direction for tracklet %d in fLines\n",itr));
+ str->PrintStatus();
+ return 0.;
+}
+
//________________________________________________________
void AliITSVertexer3D::PrintStatus() const {
// Print current status
printf("Pileup algo: %d\n",fPileupAlgo);
printf("Min DCA to 1st vertex for pileup (algo 0 and 1): %f\n",fDCAforPileup);
printf("Cut on distance between pair-vertices (algo 2): %f\n",fCutOnPairs);
- printf("Maximum number of clusters allowed on L1 or L2: %d\n",fMaxNumOfCl);
+ printf("Maximum number of clusters on L1 or L2 for downscale: %d\n",fMaxNumOfClForDownScale);
+ printf("Maximum number of clusters on L1 or L2 for histo rebin: %d\n",fMaxNumOfClForRebin);
printf("=======================================================\n");
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff