//-------------------------------------------------------------------------
// Implementation of the ITS tracker class
-//
+// It reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks
+// and fills with them the ESD
// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-------------------------------------------------------------------------
+#include <new>
+
#include <TFile.h>
#include <TTree.h>
#include <TRandom.h>
ClassImp(AliITStrackerV2)
-AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers
+AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; // ITS layers
AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() {
//--------------------------------------------------------------------
r += TMath::Sqrt(x*x + y*y);
r*=0.25;
- new (fLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
+ new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
for (Int_t j=1; j<nlad+1; j++) {
for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
Double_t r=x*cp+y*sp;
- AliITSdetector &det=fLayers[i-1].GetDetector((j-1)*ndet + k-1);
+ AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
new(&det) AliITSdetector(r,phi);
}
}
branch->SetAddress(&clusters);
Int_t j=0;
+ Int_t detector=0;
for (Int_t i=0; i<kMaxLayer; i++) {
- Int_t ndet=fLayers[i].GetNdetectors();
- Int_t jmax = j + fLayers[i].GetNladders()*ndet;
+ Int_t ndet=fgLayers[i].GetNdetectors();
+ Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
for (; j<jmax; j++) {
if (!cTree->GetEvent(j)) continue;
Int_t ncl=clusters->GetEntriesFast();
while (ncl--) {
AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
- fLayers[i].InsertCluster(new AliITSclusterV2(*c));
+ detector = c->GetDetectorIndex();
+ fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
}
clusters->Delete();
+ //add dead zone virtual "cluster"
+
+ if (i<1){
+ for (Float_t ydead = -2.; ydead < 2. ; ydead+=0.05){
+ Int_t lab[4] = {0,0,0,detector};
+ Int_t info[3] = {0,0,0};
+ Float_t hit[5]={ydead,0,1,0.01,0};
+ fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
+ //
+ hit[1]=-7.;
+ fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
+ }
+ }
+
}
- fLayers[i].ResetRoad(); //road defined by the cluster density
+ //
+ fgLayers[i].ResetRoad(); //road defined by the cluster density
}
return 0;
//--------------------------------------------------------------------
//This function unloads ITS clusters
//--------------------------------------------------------------------
- for (Int_t i=0; i<kMaxLayer; i++) fLayers[i].ResetClusters();
+ for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
}
static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) {
//Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
//if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
- if (!t->PropagateTo(riw,-diw,x0iw)) return 1;
+ if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
} else {
::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
return 1;
while (nentr--) {
AliESDtrack *esd=event->GetTrack(nentr);
- if (esd->GetStatus() != AliESDtrack::kTPCin) continue;
+ if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
+ if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSin) continue;
AliITStrackV2 *t=0;
try {
delete t;
continue;
}
- if (TMath::Abs(t->GetD())>4) continue;
+ if (TMath::Abs(t->GetD())>5) {
+ delete t;
+ continue;
+ }
if (CorrectForDeadZoneMaterial(t)!=0) {
Warning("Clusters2Tracks",
delete t;
continue;
}
+ t->fReconstructed = kFALSE;
itsTracks.AddLast(t);
}
} /* End Read ESD tracks */
itsTracks.Sort();
Int_t nentr=itsTracks.GetEntriesFast();
-
+ fTrackHypothesys.Expand(nentr);
Int_t ntrk=0;
for (fPass=0; fPass<2; fPass++) {
Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
for (Int_t i=0; i<nentr; i++) {
+ fCurrentEsdTrack = i;
AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
- if (t==0) continue; //this track has been already tracked
+ if (t==0) continue; //this track has been already tracked
+ if (t->fReconstructed) continue; //this track was already "succesfully" reconstructed
+ if ( (TMath::Abs(t->GetD(GetX(),GetY())) >2.) && fConstraint[fPass]) continue;
+ if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>2.) && fConstraint[fPass]) continue;
+
Int_t tpcLabel=t->GetLabel(); //save the TPC track label
ResetTrackToFollow(*t);
ResetBestTrack();
for (FollowProlongation(); fI<kMaxLayer; fI++) {
- while (TakeNextProlongation()) FollowProlongation();
+ while (TakeNextProlongation()) {
+ FollowProlongation();
+ }
}
- if (fBestTrack.GetNumberOfClusters() == 0) continue;
+ SortTrackHypothesys(fCurrentEsdTrack,0.9); //MI change
+ CompressTrackHypothesys(fCurrentEsdTrack,0.90,2); //MI change
+ /*
+ if (fBestTrack.GetNumberOfClusters() == 0) continue;
+
if (fConstraint[fPass]) {
- ResetTrackToFollow(*t);
- if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
- ResetBestTrack();
- }
-
+ ResetTrackToFollow(*t);
+ if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
+ ResetBestTrack();
+ }
+
fBestTrack.SetLabel(tpcLabel);
fBestTrack.CookdEdx();
CookLabel(&fBestTrack,0.); //For comparison only
fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
- UseClusters(&fBestTrack);
+ //UseClusters(&fBestTrack);
delete itsTracks.RemoveAt(i);
ntrk++;
+ */
+ AliITStrackV2 * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,5);
+ if (!besttrack) continue;
+ besttrack->SetLabel(tpcLabel);
+ besttrack->CookdEdx();
+ besttrack->fFakeRatio=1.;
+ CookLabel(besttrack,0.); //For comparison only
+ // besttrack->UpdateESDtrack(AliESDtrack::kITSin);
+
+ if (besttrack->GetChi2()/besttrack->GetNumberOfClusters()>3.5){
+ if ( (TMath::Abs(besttrack->GetD(GetX(),GetY()))>0.4) && fConstraint[fPass]) {
+ CompressTrackHypothesys(fCurrentEsdTrack,0.0,0);
+ continue;
+ }
+ if ( (TMath::Abs(besttrack->GetZat(GetX()) -GetZ() )>0.4) && fConstraint[fPass]){
+ CompressTrackHypothesys(fCurrentEsdTrack,0.0,0);
+ continue;
+ }
+ }
+
+ //delete itsTracks.RemoveAt(i);
+ t->fReconstructed = kTRUE;
+ ntrk++;
+
}
}
+
+ for (Int_t i=0; i<nentr; i++) {
+ fCurrentEsdTrack = i;
+ AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
+ if (t==0) continue;
+ Int_t tpcLabel=t->GetLabel(); //save the TPC track label
+ AliITStrackV2 * besttrack = GetBestHypothesysMIP(fCurrentEsdTrack,t);
+ if (!besttrack) continue;
+
+ besttrack->SetLabel(tpcLabel);
+ besttrack->CookdEdx();
+ besttrack->fFakeRatio=1.;
+ CookLabel(besttrack,0.); //For comparison only
+ besttrack->UpdateESDtrack(AliESDtrack::kITSin);
+ }
+ //
itsTracks.Delete();
+ //
+ Int_t entries = fTrackHypothesys.GetEntriesFast();
+ for (Int_t ientry=0;ientry<entries;ientry++){
+ TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
+ if (array) array->Delete();
+ delete fTrackHypothesys.RemoveAt(ientry);
+ }
+ fTrackHypothesys.Delete();
Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
return 0;
//--------------------------------------------------------------------
Int_t nentr=0; TObjArray itsTracks(15000);
+ Warning("Clusters2Tracks(TTree *, TTree *)",
+ "Will be removed soon ! Use Clusters2Tracks(AliESD *) instead.");
+
{/* Read TPC tracks */
AliTPCtrack *itrack=new AliTPCtrack;
TBranch *branch=tpcTree->GetBranch("tracks");
delete t;
continue;
}
- if (TMath::Abs(t->GetD())>4) continue;
+ if (TMath::Abs(t->GetD())>4) {
+ delete t;
+ continue;
+ }
if (CorrectForDeadZoneMaterial(t)!=0) {
Warning("Clusters2Tracks",
"failed to correct for the material in the dead zone !\n");
+ delete t;
continue;
}
fBestTrack.CookdEdx();
CookLabel(&fBestTrack,0.); //For comparison only
itsTree->Fill();
- UseClusters(&fBestTrack);
+ //UseClusters(&fBestTrack);
delete itsTracks.RemoveAt(i);
}
}
for (Int_t i=0; i<nentr; i++) {
AliESDtrack *esd=event->GetTrack(i);
- if (esd->GetStatus()!=(AliESDtrack::kTPCin|AliESDtrack::kITSin)) continue;
+ if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSout) continue;
AliITStrackV2 *t=0;
try {
ResetTrackToFollow(*t);
// propagete to vertex [SR, GSI 17.02.2003]
- fTrackToFollow.PropagateTo(3.,0.0028,65.19);
- fTrackToFollow.PropagateToVertex();
-
- // Start Time measurement [SR, GSI 17.02.2003]
- fTrackToFollow.StartTimeIntegral();
- fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
+ // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
+ if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
+ if (fTrackToFollow.PropagateToVertex()) {
+ fTrackToFollow.StartTimeIntegral();
+ }
+ fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
+ }
fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
if (RefitAt(49.,&fTrackToFollow,t)) {
continue;
}
fTrackToFollow.SetLabel(t->GetLabel());
- fTrackToFollow.CookdEdx();
+ //fTrackToFollow.CookdEdx();
CookLabel(&fTrackToFollow,0.); //For comparison only
fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
- UseClusters(&fTrackToFollow);
+ //UseClusters(&fTrackToFollow);
ntrk++;
}
delete t;
return 0;
}
-Int_t AliITStrackerV2::PropagateBack(TTree *inp, TTree *out) {
- //--------------------------------------------------------------------
- //This functions propagates reconstructed ITS tracks back
- //--------------------------------------------------------------------
- Error("PropagateBack","This method is not converted to NewIO yet (Args: %x , %x )\n",inp,out);
- return 1;
- /*
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
-
- if (LoadClusters()!=0) return 1;
-
- if (!in->IsOpen()) {
- Error("PropagateBack","file with ITS tracks is not open !\n");
- return 1;
- }
-
- if (!out->IsOpen()) {
- Error("PropagateBack","file for back propagated ITS tracks is not open !\n");
- return 2;
- }
-
- in->cd();
-
- Char_t tname[100];
- sprintf(tname,"TreeT_ITS_%d",GetEventNumber());
- TTree *itsTree=(TTree*)in->Get(tname);
- if (!itsTree) {
- Error("PropagateBack","can't get a tree with ITS tracks !\n");
- return 3;
- }
- AliITStrackV2 *itrack=new AliITStrackV2;
- itsTree->SetBranchAddress("tracks",&itrack);
-
- out->cd();
-
- sprintf(tname,"TreeT_ITSb_%d",GetEventNumber());
- TTree backTree(tname,"Tree with back propagated ITS tracks");
- AliTPCtrack *otrack=0;
- backTree.Branch("tracks","AliTPCtrack",&otrack,32000,2);
-
- Int_t nentr=(Int_t)itsTree->GetEntries();
- Int_t i;
- for (i=0; i<nentr; i++) {
- itsTree->GetEvent(i);
- Int_t itsLabel=itrack->GetLabel(); //save the ITS track label
- ResetTrackToFollow(*itrack);
-
- // propagete to vertex [SR, GSI 17.02.2003]
- fTrackToFollow.PropagateTo(3.,0.0028,65.19);
- fTrackToFollow.PropagateToVertex();
-
- // Start Time measurement [SR, GSI 17.02.2003]
- fTrackToFollow.StartTimeIntegral();
- fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
- //
-
- fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
- if (!RefitAt(49.,&fTrackToFollow,itrack)) continue;
-
- if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
- Warning("PropagateBack",
- "failed to correct for the material in the dead zone !\n");
- continue;
- }
-
- fTrackToFollow.SetLabel(itsLabel);
- otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha());
- backTree.Fill(); delete otrack;
- UseClusters(&fTrackToFollow);
- }
- i=(Int_t)backTree.GetEntries();
- backTree.Write();
-
- Info("PropagateBack","Number of ITS tracks: %d\n",nentr);
- Info("PropagateBack","Number of back propagated ITS tracks: %d\n",i);
-
- delete itrack;
- delete itsTree; //Thanks to Mariana Bondila
-
- UnloadClusters();
-
- savedir->cd();
-
- return 0;
- */
-}
-
Int_t AliITStrackerV2::RefitInward(AliESD *event) {
//--------------------------------------------------------------------
// This functions refits ITS tracks using the
for (Int_t i=0; i<nentr; i++) {
AliESDtrack *esd=event->GetTrack(i);
- ULong_t flags = AliESDtrack::kITSin | AliESDtrack::kTPCrefit;
-
- if ( (esd->GetStatus() & flags) != flags ) continue;
- if ( esd->GetStatus() & AliESDtrack::kITSrefit) continue;
+ if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
+ if (esd->GetStatus()&AliESDtrack::kTPCout)
+ if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
AliITStrackV2 *t=0;
try {
ResetTrackToFollow(*t);
fTrackToFollow.ResetClusters();
+ if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
+ fTrackToFollow.ResetCovariance();
+
//Refitting...
if (RefitAt(3.7, &fTrackToFollow, t)) {
fTrackToFollow.SetLabel(t->GetLabel());
fTrackToFollow.CookdEdx();
- CookLabel(&fTrackToFollow,0.); //For comparison only
- fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
- UseClusters(&fTrackToFollow);
- ntrk++;
+ CookLabel(&fTrackToFollow,0.0); //For comparison only
+
+ if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
+ Double_t a=fTrackToFollow.GetAlpha();
+ Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
+ Double_t xv= GetX()*cs + GetY()*sn;
+ Double_t yv=-GetX()*sn + GetY()*cs;
+
+ Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
+ Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
+ Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
+ Double_t fv=TMath::ATan(tgfv);
+
+ cs=TMath::Cos(fv); sn=TMath::Sin(fv);
+ x = xv*cs + yv*sn;
+ yv=-xv*sn + yv*cs; xv=x;
+
+ if (fTrackToFollow.Propagate(fv+a,xv)) {
+ fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
+ //UseClusters(&fTrackToFollow);
+ {
+ AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
+ c.SetSigmaY2(GetSigmaY()*GetSigmaY());
+ c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
+ Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
+ if (chi2<kMaxChi2)
+ if (fTrackToFollow.Update(&c,-chi2,0))
+ fTrackToFollow.SetConstrainedESDtrack(chi2);
+ }
+ ntrk++;
+ }
+ }
}
delete t;
}
return 0;
}
-Int_t AliITStrackerV2::RefitInward(TTree *in, TTree *out) {
- //--------------------------------------------------------------------
- // This functions refits ITS tracks using the
- // "inward propagated" TPC tracks
- //--------------------------------------------------------------------
- Error("RefitInward","This method is not converted to NewIO yet (Args: %x , %x )\n",in,out);
- return 1;
- /*
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
-
- if (LoadClusters()!=0) return 1;
-
- if (!inSeeds->IsOpen()) {
- Error("RefitInward","file with inward TPC tracks is not open !\n");
- return 2;
- }
-
- if (!in->IsOpen()) {
- Error("RefitInward","file with ITS tracks is not open !\n");
- return 2;
- }
-
- if (!out->IsOpen()) {
- Error("RefitInward","file for inward ITS tracks is not open !\n");
- return 3;
- }
-
- Int_t i;
-
- //LUT used for the track matching (S.Radomski's idea)
- const Int_t nLab = 400000; // limit on the number of track labels
- Int_t lut[nLab];
- for(i=0; i<nLab; i++) lut[i] = -1;
-
- Char_t tname[100];
-
- TObjArray itsTracks(15000);
- {// Read the ITS tracks
- sprintf(tname,"TreeT_ITS_%d",GetEventNumber());
- TTree *itsTree=(TTree*)in->Get(tname);
- if (!itsTree) {
- Error("RefitInward","can't get a tree with ITS tracks !\n");
- return 3;
- }
- AliITStrackV2 *itrack=new AliITStrackV2;
- itsTree->SetBranchAddress("tracks",&itrack);
- Int_t nits=(Int_t)itsTree->GetEntries();
-
- Info("RefitInward","Number of ITS tracks: %d\n",nits);
-
- for (Int_t i=0; i<nits; i++) {
- itsTree->GetEvent(i);
- Int_t lab=TMath::Abs(itrack->GetLabel());
- if (lab < nLab) {
- if (lut[lab]>=0) Warning("RefitInward","double track %d\n",lab);
- lut[lab]=i;
- } else {
- Warning("RefitInward","Too big ITS track label: %d\n!",lab);
- continue;
- }
- itsTracks.AddLast(new AliITStrackV2(*itrack));
- }
- delete itsTree;
- delete itrack;
- }
-
- //Get the input seeds tree
- inSeeds->cd();
- sprintf(tname,"tracksTPC_%d",GetEventNumber());
- TTree *tpcTree=(TTree*)inSeeds->Get(tname);
- if (!tpcTree) {
- Error("RefitInward","can't get a tree with TPC tracks !\n");
- return 3;
- }
- AliTPCtrack *itrack=new AliTPCtrack;
- tpcTree->SetBranchAddress("tracks",&itrack);
- Int_t ntpc=(Int_t)tpcTree->GetEntries();
-
- Info("RefitInward","Number of TPC tracks: %d\n",ntpc);
-
- //Create the output tree
- out->cd();
- sprintf(tname,"TreeT_ITSinward_%d",GetEventNumber());
- TTree outTree(tname,"Tree with inward refitted ITS tracks");
- AliITStrackV2 *otrack=0;
- outTree.Branch("tracks","AliITStrackV2",&otrack,32000,0);
-
- for (i=0; i<ntpc; i++) {
- tpcTree->GetEvent(i);
- try {
- otrack=new AliITStrackV2(*itrack);
- } catch (const Char_t *msg) {
- Warning("RefitInward",msg);
- delete otrack;
- continue;
- }
- //check if this track was reconstructed in the ITS
- Int_t lab=TMath::Abs(otrack->GetLabel());
- if (lab >= nLab) {
- Warning("RefitInward","Too big TPC track label: %d\n!",lab);
- continue;
- }
- Int_t idx=lut[lab];
- if (idx<0) continue; //no prolongation in the ITS for this track
-
- if (CorrectForDeadZoneMaterial(otrack)!=0) {
- Warning("RefitInward",
- "failed to correct for the material in the dead zone !\n");
- continue;
- }
-
- //Refitting...
- {
- AliITStrackV2 *ctrack=(AliITStrackV2*)itsTracks.UncheckedAt(idx);
- if (!RefitAt(3.7, otrack, ctrack)) continue;
- }
- otrack->SetLabel(itrack->GetLabel()); //For comparison only
- otrack->CookdEdx();
- CookLabel(otrack,0.); //For comparison only
- outTree.Fill();
- delete otrack;
- }
- i=(Int_t)outTree.GetEntries();
- Info("RefitInward","Number of inward refitted ITS tracks: %d\n",i);
- outTree.Write();
-
- delete tpcTree;
- delete itrack;
- UnloadClusters();
- itsTracks.Delete();
-
- savedir->cd();
-
- return 0;
- */
-}
-
AliCluster *AliITStrackerV2::GetCluster(Int_t index) const {
//--------------------------------------------------------------------
// Return pointer to a given cluster
//--------------------------------------------------------------------
Int_t l=(index & 0xf0000000) >> 28;
Int_t c=(index & 0x0fffffff) >> 00;
- return fLayers[l].GetCluster(c);
+ return fgLayers[l].GetCluster(c);
}
while (fI>fLastLayerToTrackTo) {
Int_t i=fI-1;
- AliITSlayer &layer=fLayers[i];
+ AliITSlayer &layer=fgLayers[i];
AliITStrackV2 &track=fTracks[i];
Double_t r=layer.GetR();
if (i==3 || i==1) {
- Double_t rs=0.5*(fLayers[i+1].GetR() + r);
+ Double_t rs=0.5*(fgLayers[i+1].GetR() + r);
Double_t d=0.0034, x0=38.6;
if (i==1) {rs=9.; d=0.0097; x0=42;}
if (!fTrackToFollow.PropagateTo(rs,d,x0)) {
return;
}
- if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
+ // if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
//Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]);
+ if (TMath::Abs(track.GetSnp()>kMaxSnp)) {
+ fI--;
+ continue; // MI
+ }
if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp());
if (dy > kMaxRoad) {
//Warning("FollowProlongation","too broad road in Y !\n");
fI--;
//take another prolongation
- if (!TakeNextProlongation())
- if (fLayersNotToSkip[fI]) return;
-
+ if (!TakeNextProlongation()){
+ //skipped++;
+ fTrackToFollow.fNSkipped++;
+ if (fLayersNotToSkip[fI]||fTrackToFollow.fNSkipped>1) return;
+ }
+ if (fTrackToFollow.fNUsed>1) return;
+ if (fTrackToFollow.fNUsed+fTrackToFollow.fNSkipped>1) return;
+ if ( (fI<3) && ( fTrackToFollow.GetChi2()/fTrackToFollow.GetNumberOfClusters()>kChi2PerCluster)) return;
}
//deal with the best track
Int_t ncl=fTrackToFollow.GetNumberOfClusters();
Int_t nclb=fBestTrack.GetNumberOfClusters();
- if (ncl)
- if (ncl >= nclb) {
- Double_t chi2=fTrackToFollow.GetChi2();
- if (chi2/ncl < kChi2PerCluster) {
- if (ncl > nclb || chi2 < fBestTrack.GetChi2()) {
- ResetBestTrack();
+ if (ncl){
+ if (ncl<4) return;
+ if ( (ncl<6) && (fTrackToFollow.GetChi2()/float(ncl))>3) return;
+ if (fTrackToFollow.GetChi2()/ncl>5.5) return;
+ fTrackToFollow.CookdEdx();
+ if (fTrackToFollow.fESDtrack->GetTPCsignal()>80.)
+ if ((fTrackToFollow.GetdEdx()/fTrackToFollow.fESDtrack->GetTPCsignal())<0.35){
+ // mismatch in dedx
+ return;
+ }
+ //
+ fTrackToFollow.SetLabel(fTrackToFollow.fESDtrack->GetLabel());
+ CookLabel(&fTrackToFollow,0.); //
+ //
+ if ( (nclb>3) && ((fTrackToFollow.GetChi2()/ncl)<(3*fBestTrack.GetChi2()/(nclb))))
+ AddTrackHypothesys(new AliITStrackV2(fTrackToFollow), fCurrentEsdTrack);
+ else
+ if (ncl>3) AddTrackHypothesys(new AliITStrackV2(fTrackToFollow), fCurrentEsdTrack);
+ if (ncl >= nclb) {
+ Double_t chi2=fTrackToFollow.GetChi2();
+ if (chi2/ncl < kChi2PerCluster) {
+ if (ncl > nclb ) {
+ ResetBestTrack();
}
- }
+ if ( (ncl == nclb) && chi2 < fBestTrack.GetChi2()) {
+ ResetBestTrack();
+ }
+ }
+ }
}
-
}
Int_t AliITStrackerV2::TakeNextProlongation() {
//
// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//--------------------------------------------------------------------
- AliITSlayer &layer=fLayers[fI];
+ AliITSlayer &layer=fgLayers[fI];
ResetTrackToFollow(fTracks[fI]);
Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]);
Double_t chi2=12345.;
while ((c=layer.GetNextCluster(ci))!=0) {
Int_t idet=c->GetDetectorIndex();
-
if (fTrackToFollow.GetDetectorIndex()!=idet) {
const AliITSdetector &det=layer.GetDetector(idet);
ResetTrackToFollow(fTracks[fI]);
if (chi2>=kMaxChi2) return 0;
if (!c) return 0;
+ if (c->IsUsed()&&c->GetNy()<5) { //shared factor
+ chi2+=1;
+ chi2*=2*(1./(TMath::Max(c->GetNy(),1)));
+ }
+ if (c->GetQ()==0){ //dead zone virtual cluster
+ chi2*=4.;
+ chi2+=20;
+ fTrackToFollow.fNUsed++;
+ return 1;
+ }
+ //if ((fI<2)&&chi2>kMaxChi2In) return 0;
if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) {
//Warning("TakeNextProlongation","filtering failed !\n");
return 0;
}
-
+ if (c->IsUsed()&&c->GetNy()<5) fTrackToFollow.fNUsed++;
if (fTrackToFollow.GetNumberOfClusters()>1)
if (TMath::Abs(fTrackToFollow.GetD())>4) return 0;
Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
Double_t xyz[]={GetX(),GetY(),GetZ()};
Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
+ Double_t deltad = TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()));
+ Double_t deltaz = TMath::Abs(fTrackToFollow.GetZat(GetX())-GetZ());
+
+ if ( (fI==4) && (deltad>2.0 || deltaz>1.5)) return 0; // don't "improve" secondaries
+ if ( (fI==3) && (deltad>1.5 || deltaz>0.9)) return 0; // don't "improve" secondaries
+ if ( (fI==2) && (deltad>0.9 || deltaz>0.6)) return 1; // don't "improve" secondaries
+ if ( (fI==1) && (deltad>0.3 || deltaz>0.3)) return 1; // don't "improve" secondaries
+ if ( (fI==0) && (deltad>0.1 || deltaz>0.1)) return 1; // don't "improve" secondaries
+
fTrackToFollow.Improve(d,xyz,ers);
}
//--------------------------------------------------------------------
delete[] fDetectors;
for (Int_t i=0; i<fN; i++) delete fClusters[i];
+ for (Int_t i=0; i<kMaxClusterPerLayer;i++) fClusterWeight[i]=0;
}
void AliITStrackerV2::AliITSlayer::ResetClusters() {
// This function removes loaded clusters
//--------------------------------------------------------------------
for (Int_t i=0; i<fN; i++) delete fClusters[i];
+ for (Int_t i=0; i<kMaxClusterPerLayer;i++) fClusterWeight[i]=0;
fN=0;
fI=0;
}
+void AliITStrackerV2::AliITSlayer::ResetWeights() {
+ //--------------------------------------------------------------------
+ // This function reset weights of the clusters
+ //--------------------------------------------------------------------
+ for (Int_t i=0; i<kMaxClusterPerLayer;i++) fClusterWeight[i]=0;
+}
+
void AliITStrackerV2::AliITSlayer::ResetRoad() {
//--------------------------------------------------------------------
// This function calculates the road defined by the cluster density
for (Int_t i=fI; i<fN; i++) {
const AliITSclusterV2 *c=fClusters[i];
if (c->GetZ() > fZmax) break;
- if (c->IsUsed()) continue;
+ // if (c->IsUsed()) continue;
const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
Double_t y=fR*det.GetPhi() + c->GetY();
Double_t d=0.0028*3*3; //beam pipe
Double_t x0=0;
- Double_t xn=fLayers[fI].GetR();
+ Double_t xn=fgLayers[fI].GetR();
for (Int_t i=0; i<fI; i++) {
- Double_t xi=fLayers[i].GetR();
- d+=fLayers[i].GetThickness(y,z,x0)*xi*xi;
+ Double_t xi=fgLayers[i].GetR();
+ d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
}
if (fI>1) {
}
if (fI>3) {
- Double_t xi=0.5*(fLayers[3].GetR()+fLayers[4].GetR());
+ Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
d+=0.0034*xi*xi;
}
}
for (Int_t i=from; i != to; i += step) {
- AliITSlayer &layer=fLayers[i];
+ AliITSlayer &layer=fgLayers[i];
Double_t r=layer.GetR();
{
Double_t hI=i-0.5*step;
if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
- Double_t rs=0.5*(fLayers[i-step].GetR() + r);
+ Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
Double_t d=0.0034, x0=38.6;
if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
if (!t->PropagateTo(rs,-step*d,x0)) {
return kTRUE;
}
+
+Float_t *AliITStrackerV2::GetWeight(Int_t index) {
+ //--------------------------------------------------------------------
+ // Return pointer to a given cluster
+ //--------------------------------------------------------------------
+ Int_t l=(index & 0xf0000000) >> 28;
+ Int_t c=(index & 0x0fffffff) >> 00;
+ return fgLayers[l].GetWeight(c);
+}
+
+
+
void AliITStrackerV2::UseClusters(const AliKalmanTrack *t, Int_t from) const {
//--------------------------------------------------------------------
// This function marks clusters assigned to the track
if (c->GetSigmaZ2()>0.1) c->Use();
}
+
+
+void AliITStrackerV2::AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex)
+{
+ //------------------------------------------------------------------
+ // add track to the list of hypothesys
+ //------------------------------------------------------------------
+
+ if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
+ //
+ TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
+ if (!array) {
+ array = new TObjArray(10);
+ fTrackHypothesys.AddAt(array,esdindex);
+ }
+ array->AddLast(track);
+}
+
+void AliITStrackerV2::SortTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel)
+{
+ //-------------------------------------------------------------------
+ // compress array of track hypothesys
+ // keep only maxsize best hypothesys
+ //-------------------------------------------------------------------
+ if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
+ if (! (fTrackHypothesys.At(esdindex)) ) return;
+ TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
+ Int_t entries = array->GetEntriesFast();
+
+ Float_t * chi2 = new Float_t[entries];
+ Float_t * probability = new Float_t[entries];
+ Float_t sumprobabilityall=0;
+ Int_t * index = new Int_t[entries];
+ //
+ //
+ for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ //
+ if (track && track->GetNumberOfClusters()>(track->fNUsed+track->fNSkipped)){
+ //
+ chi2[itrack] = track->GetChi2()/(track->GetNumberOfClusters()-track->fNUsed-track->fNSkipped);
+ if (track->fESDtrack)
+ if (track->fESDtrack->GetTPCsignal()>80){
+ track->CookdEdx();
+ if ((track->GetdEdx()/track->fESDtrack->GetTPCsignal())<0.4){
+ Float_t factor = 2.+10.*(0.6-track->GetdEdx()/track->fESDtrack->GetTPCsignal());
+ chi2[itrack]*= factor; //mismatch in dEdx
+ }
+ }
+ }
+ else
+ chi2[itrack] = 10000000.;
+ probability[itrack] = 1./(0.3+chi2[itrack]);
+ sumprobabilityall+=probability[itrack];
+ }
+
+ TMath::Sort(entries,chi2,index,kFALSE);
+ TObjArray * newarray = new TObjArray();
+ Float_t sumprobability = 0.;
+ for (Int_t i=0;i<entries;i++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(index[i]);
+ if (!track) break;
+ if (chi2[index[i]]<30){
+ newarray->AddLast(array->RemoveAt(index[i]));
+ track->fChi2MIP[0] = chi2[index[i]]; // base chi 2
+ sumprobability+= probability[index[i]]/sumprobabilityall;
+ if (sumprobability> likelihoodlevel) break;
+ }
+ else{
+ delete array->RemoveAt(index[i]);
+ }
+ }
+
+ array->Delete();
+ delete fTrackHypothesys.RemoveAt(esdindex);
+ fTrackHypothesys.AddAt(newarray,esdindex);
+
+ delete [] chi2;
+ delete [] index;
+
+}
+
+
+void AliITStrackerV2::CompressTrackHypothesys(Int_t esdindex, Float_t likelihoodlevel, Int_t maxsize)
+{
+ //
+ //
+ if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
+ if (! (fTrackHypothesys.At(esdindex)) ) return;
+ TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
+ Int_t entries = array->GetEntriesFast();
+ //
+ if (likelihoodlevel>0.000001){
+ Float_t *probability = new Float_t[entries];
+ for (Int_t i=0;i<entries;i++) probability[i]=0.;
+ Float_t sumprobabilityall=0;
+ Int_t *index = new Int_t[entries];
+
+ for (Int_t itrack=0;itrack<entries;itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ probability[itrack]=0;
+ if (!track) continue;
+ probability[itrack] = 1./(0.3+track->fChi2MIP[0]);
+ sumprobabilityall += probability[itrack];
+ //
+ }
+ if (sumprobabilityall<=0.000000000000001){
+ return;
+ }
+ for (Int_t itrack=0;itrack<entries;itrack++){
+ probability[itrack]/=sumprobabilityall;
+ }
+
+ TMath::Sort(entries, probability, index, kTRUE);
+ //
+ TObjArray * newarray = new TObjArray();
+ Float_t sumprobability = 0.;
+ for (Int_t i=0;i<entries;i++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(index[i]);
+ if (!track) continue;
+ newarray->AddLast(array->RemoveAt(index[i]));
+ sumprobability+= probability[index[i]];
+ if (sumprobability> likelihoodlevel) break;
+ if (i>maxsize) break;
+ }
+
+ array->Delete();
+ delete fTrackHypothesys.RemoveAt(esdindex);
+ fTrackHypothesys.AddAt(newarray,esdindex);
+ //
+ delete []index;
+ delete []probability;
+ }
+ else{
+ array->Delete();
+ delete fTrackHypothesys.RemoveAt(esdindex);
+ }
+}
+
+
+AliITStrackV2 * AliITStrackerV2::GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original, Int_t checkmax)
+{
+ //-------------------------------------------------------------
+ // try to find best hypothesy
+ // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
+ //-------------------------------------------------------------
+ if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
+ TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
+ if (!array) return 0;
+ Int_t entries = array->GetEntriesFast();
+ if (!entries) return 0;
+ Float_t minchi2 = 100000;
+ Int_t maxn = 3;
+ AliITStrackV2 * besttrack=0;
+ Int_t accepted =0;
+ Int_t maxindex=0;
+ //
+ Float_t sumz2=0;
+ Float_t sumy2=0;
+ Float_t sumall=0;
+ for (Int_t itrack=0;itrack<entries; itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ sumall++;
+ sumz2+=track->GetSigmaZ2();
+ sumy2+=track->GetSigmaY2();
+ }
+ sumz2/=sumall;
+ sumy2/=sumall;
+
+ Float_t dedxmismatch=1;
+ for (Int_t i=0;i<entries;i++){
+ maxindex = i;
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(i);
+ if (!track) continue;
+ track->fChi2MIP[1] = 1000000;
+ track->fChi2MIP[2] = 1000000;
+
+ if ( (track->GetNumberOfClusters()-track->fNSkipped-track->fNUsed)<2) continue;
+ //
+ if (track->fESDtrack)
+ if (track->fESDtrack->GetTPCsignal()>80){
+ track->CookdEdx();
+ if ((track->GetdEdx()/track->fESDtrack->GetTPCsignal())<0.4){
+ //mismatch in dEdx
+ dedxmismatch= 2.+ 10.*(0.6-track->GetdEdx()/track->fESDtrack->GetTPCsignal());
+ }
+ }
+
+ // track->SetLabel(original->GetLabel());
+ //CookLabel(track,0.0);
+ //if (track->GetFakeRatio()>0.01) continue;
+ //
+ //
+ // backtrack
+ AliITStrackV2 * backtrack = new AliITStrackV2(*track);
+ backtrack->ResetCovariance();
+ backtrack->ResetClusters();
+ Double_t x = original->GetX();
+ if (!RefitAt(x,backtrack,track)){
+ delete backtrack;
+ delete array->RemoveAt(i);
+ continue;
+ }
+ if ( (backtrack->GetChi2() / float(backtrack->GetNumberOfClusters()-track->fNSkipped-track->fNUsed-0.5))>6)
+ {
+ delete backtrack;
+ delete array->RemoveAt(i);
+ continue;
+ }
+ Double_t deltac = backtrack->GetC()-original->GetC();
+ Double_t deltatgl = backtrack->GetTgl()-original->GetTgl();
+ //
+ Double_t poolc2 = (deltac*deltac)/(original->fC44+backtrack->fC44);
+ Double_t pooltgl2 = (deltatgl*deltatgl)/(original->fC33+backtrack->fC33);
+ if ((poolc2+pooltgl2)>32){ //4 sigma
+ delete backtrack;
+ delete array->RemoveAt(i);
+ continue;
+ }
+ //Double_t bpoolc = (deltac*deltac)/(original->fC44);
+ //Double_t bpooltgl = (deltatgl*deltatgl)/(original->fC33);
+
+ //
+ //forward track - without constraint
+ AliITStrackV2 * forwardtrack = new AliITStrackV2(*original);
+ // forwardtrack->ResetCovariance();
+ forwardtrack->ResetClusters();
+ x = track->GetX();
+ if (!RefitAt(x,forwardtrack,track)){
+ delete forwardtrack;
+ delete backtrack;
+ delete array->RemoveAt(i);
+ continue;
+ }
+ if ( (forwardtrack->GetChi2()/float(forwardtrack->GetNumberOfClusters()-track->fNSkipped-track->fNUsed))>6)
+ {
+ delete forwardtrack;
+ delete array->RemoveAt(i);
+ continue;
+ }
+ //
+ accepted++;
+ if (accepted>checkmax){
+ delete backtrack;
+ delete forwardtrack;
+ break;
+ }
+ Double_t chi2 = (backtrack->GetChi2()/(backtrack->GetNumberOfClusters()-1-track->fNSkipped-track->fNUsed)+
+ forwardtrack->GetChi2()/(forwardtrack->GetNumberOfClusters()-track->fNSkipped-track->fNUsed));
+ // bpoolc+bpooltgl;
+ // chi2 *= (forwardtrack->GetSigmaZ2()/sumz2+forwardtrack->GetSigmaY2()/sumy2);
+ chi2 *= dedxmismatch;
+ //
+ //
+ track->fChi2MIP[1] = backtrack->GetChi2()/(backtrack->GetNumberOfClusters()-1-track->fNSkipped-track->fNUsed);
+ track->fChi2MIP[2] = forwardtrack->GetChi2()/(forwardtrack->GetNumberOfClusters()-track->fNSkipped-track->fNUsed);
+ track->fChi2MIP[3] = poolc2+pooltgl2;
+ //
+
+ if (track->GetNumberOfClusters()>maxn){
+ besttrack = new AliITStrackV2(*forwardtrack);
+ maxn = track->GetNumberOfClusters();
+ minchi2 = chi2;
+ delete backtrack;
+ delete forwardtrack;
+ continue;
+ }
+ //
+ if (chi2 < minchi2){
+ besttrack = new AliITStrackV2(*forwardtrack);
+ minchi2 = chi2;
+ }
+ delete backtrack;
+ delete forwardtrack;
+ }
+ //
+ //
+ if (!besttrack || besttrack->GetNumberOfClusters()<4) {
+ return 0;
+ }
+
+ //
+ besttrack->SetLabel(original->GetLabel());
+ CookLabel(besttrack,0.0);
+ //
+ // calculate "weight of the cluster"
+ //
+
+ {
+ //sign usage information for clusters
+ Int_t clusterindex[6][100];
+ Double_t clusterweight[6][100];
+ for (Int_t ilayer=0;ilayer<6;ilayer++)
+ for (Int_t icluster=0;icluster<100;icluster++){
+ clusterindex[ilayer][icluster] = -1;
+ clusterweight[ilayer][icluster] = 0;
+ }
+ //printf("%d\t%d\n",esdindex, entries);
+ //
+ Float_t sumchi2=0;
+ for (Int_t itrack=0;itrack<entries; itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ if (track->fChi2MIP[1]>1000) continue; //not accepted
+ sumchi2 +=1./(0.3+track->fChi2MIP[1]+track->fChi2MIP[2]);
+ }
+ for (Int_t itrack=0;itrack<entries;itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ if (track->fChi2MIP[1]>1000) continue; //not accepted
+ for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
+ Int_t tindex = track->GetClusterIndex(icluster);
+ Int_t ilayer = (tindex & 0xf0000000) >> 28;
+ if (tindex<0) continue;
+ Int_t cindex =0;
+ //
+ for (cindex=0;cindex<100;cindex++){
+ if (clusterindex[ilayer][cindex]<0) break;
+ if (clusterindex[ilayer][cindex]==tindex) break;
+ }
+ if (cindex>100) break;
+ if (clusterindex[ilayer][cindex]!=tindex) clusterindex[ilayer][cindex] = tindex;
+ clusterweight[ilayer][cindex]+= (1./(0.3+track->fChi2MIP[1]+track->fChi2MIP[2]))* (1./sumchi2);
+ Float_t *weight = GetWeight(tindex);
+
+ if (weight){
+ *weight+= (1./(0.3+track->fChi2MIP[1]+track->fChi2MIP[2]))* (1./sumchi2);
+ }
+ }
+ }
+
+ if (besttrack->GetChi2()/besttrack->GetNumberOfClusters()>3.5) return besttrack; //don't sign clusters
+ Int_t current=0;
+ Double_t deltad = besttrack->GetD(GetX(),GetY());
+ Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
+ Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
+
+ for (Int_t icluster=0;icluster<besttrack->GetNumberOfClusters();icluster++){
+ Int_t index = besttrack->GetClusterIndex(icluster);
+ Int_t ilayer = (index & 0xf0000000) >> 28;
+ AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
+ if (!c) continue;
+ //
+ for (Int_t icluster=0;icluster<100;icluster++){
+ // sign non "doubt" clusters as used
+ if (clusterindex[ilayer][icluster]!=index) continue;
+ // Float_t * weight = GetWeight(index);
+ //if (weight) if (*weight>1){
+ // if (c->IsUsed()) continue;
+ // c->Use();
+ //}
+ if ( (ilayer*0.2+0.2)<deltaprim) continue; // secondaries
+ if (c->GetNy()>4) continue; // don sign cluster
+ if ( (ilayer>1&&clusterweight[ilayer][icluster]>0.7) || (ilayer<2&&clusterweight[ilayer][icluster]>0.8) ){
+ current++;
+ if (c->IsUsed()) continue;
+ c->Use();
+ }
+ }
+ }
+ }
+
+ //
+ return besttrack;
+}
+
+
+AliITStrackV2 * AliITStrackerV2::GetBestHypothesysMIP(Int_t esdindex, AliITStrackV2 * original)
+{
+ //-------------------------------------------------------------
+ // try to find best hypothesy
+ // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
+ //-------------------------------------------------------------
+ if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
+ TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
+ if (!array) return 0;
+ Int_t entries = array->GetEntriesFast();
+ if (!entries) return 0;
+ AliITStrackV2 * besttrack=0;
+ //
+ //sign usage information for clusters
+ Int_t clusterindex[6][100];
+ Double_t clusterweight[6][100];
+ for (Int_t ilayer=0;ilayer<6;ilayer++)
+ for (Int_t icluster=0;icluster<100;icluster++){
+ clusterindex[ilayer][icluster] = -1;
+ clusterweight[ilayer][icluster] = 0;
+ }
+ //printf("%d\t%d\n",esdindex, entries);
+ //
+ Float_t sumchi2=0;
+ for (Int_t itrack=0;itrack<entries; itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ if (track->fChi2MIP[1]>1000) continue; //not accepted - before
+ sumchi2 +=1./(0.3+track->fChi2MIP[1]+track->fChi2MIP[2]);
+ }
+ //
+ // get cluster weight
+ for (Int_t itrack=0;itrack<entries;itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ if (track->fChi2MIP[1]>1000) continue; // track not accepted in previous iterration
+ for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
+ Int_t tindex = track->GetClusterIndex(icluster);
+ Int_t ilayer = (tindex & 0xf0000000) >> 28;
+ if (tindex<0) continue;
+ Int_t cindex =0;
+ //
+ for (cindex=0;cindex<100;cindex++){
+ if (clusterindex[ilayer][cindex]<0) break;
+ if (clusterindex[ilayer][cindex]==tindex) break;
+ }
+ if (cindex>100) break;
+ if (clusterindex[ilayer][cindex]!=tindex) clusterindex[ilayer][cindex] = tindex;
+ clusterweight[ilayer][cindex]+= (1./(0.3+track->fChi2MIP[1]+track->fChi2MIP[2]))* (1./sumchi2);
+ }
+ }
+ //
+ // get cluster relative sharing - factor
+ //
+ //
+ for (Int_t ilayer=0;ilayer<6;ilayer++)
+ for (Int_t cindex=0;cindex<100;cindex++){
+ if (clusterindex[ilayer][cindex]<0) continue;
+ Int_t tindex = clusterindex[ilayer][cindex];
+ Float_t *weight = GetWeight(tindex);
+ if (!weight){
+ printf("Problem 1\n"); // not existing track
+ continue;
+ }
+ if (*weight<(clusterweight[ilayer][cindex]-0.00001)){
+ printf("Problem 2\n"); // not normalized probability
+ continue;
+ }
+ AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(tindex);
+ if (c->GetNy()<5){
+ clusterweight[ilayer][cindex]/= *weight;
+ }
+ else{
+ Float_t weight2 = TMath::Max(*weight-0.5*clusterweight[ilayer][cindex],0.0000001);
+ clusterweight[ilayer][cindex]/= weight2;
+ if ( clusterweight[ilayer][cindex]>1) clusterweight[ilayer][cindex] =1.;
+ }
+ }
+ //
+ //take to the account sharing factor
+ //
+ Float_t chi2 =10000000;
+ Float_t sharefactor=0;
+ Float_t minchi2 = 100000000;
+ Float_t secchi2 = 100000000;
+ Float_t norm=0;
+ for (Int_t itrack=0;itrack<entries; itrack++){
+ AliITStrackV2 * track = (AliITStrackV2*)array->At(itrack);
+ if (!track) continue;
+ if (track->fChi2MIP[1]>1000) continue; //not accepted - before
+ chi2 = track->fChi2MIP[1];
+ Float_t newchi2=0;
+ sharefactor=0;
+ norm =0;
+ //
+ for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
+ Int_t tindex = track->GetClusterIndex(icluster);
+ Int_t ilayer = (tindex & 0xf0000000) >> 28;
+ if (tindex<0) continue;
+ Int_t cindex =0;
+ Float_t cchi2 = (track->fDy[ilayer]*track->fDy[ilayer])/(track->fSigmaY[ilayer]*track->fSigmaY[ilayer]) +
+ (track->fDz[ilayer]*track->fDz[ilayer])/(track->fSigmaZ[ilayer]*track->fSigmaZ[ilayer]) ;
+ //
+ for (cindex=0;cindex<100;cindex++){
+ if (clusterindex[ilayer][cindex]<0) break;
+ if (clusterindex[ilayer][cindex]==tindex) break;
+ }
+ if (cindex>100) continue;
+ if (clusterweight[ilayer][cindex]>0.00001){
+ sharefactor+= clusterweight[ilayer][cindex];
+ cchi2/=clusterweight[ilayer][cindex];
+ norm++;
+ }
+ newchi2+=cchi2;
+ }
+ newchi2/=(norm-track->fNSkipped-track->fNUsed);
+ track->fChi2MIP[4] = newchi2;
+ //if (norm>0) sharefactor/=norm;
+ //if (sharefactor<0.5) return 0;
+ // chi2*=1./(0.5+sharefactor);
+ if (newchi2<minchi2){
+ besttrack = track;
+ minchi2 = newchi2;
+ }
+ else{
+ if (newchi2<secchi2){
+ secchi2 = newchi2;
+ }
+ }
+ //
+ }
+
+ //
+ //
+ if (!besttrack || besttrack->GetNumberOfClusters()<4) {
+ return 0;
+ }
+ //
+ if ((minchi2/secchi2)<0.7){
+ //
+ //increase the weight for clusters if the probability of other hypothesys is small
+ Double_t deltad = besttrack->GetD(GetX(),GetY());
+ Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
+ Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
+ //
+ for (Int_t icluster=0;icluster<besttrack->GetNumberOfClusters();icluster++){
+ Int_t index = besttrack->GetClusterIndex(icluster);
+ Int_t ilayer = (index & 0xf0000000) >> 28;
+ AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
+ if (!c) continue;
+ if (c->GetNy()>3) continue;
+ if ( (ilayer*0.2+0.2)<deltaprim) continue; // secondaries
+ Float_t * weight = GetWeight(index);
+ *weight*=2.;
+ *weight+=1.;
+ }
+ }
+
+
+ besttrack->SetLabel(original->GetLabel());
+ CookLabel(besttrack,0.0);
+
+ //
+ return besttrack;
+}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff