#include "AliITSgeom.h"
#include "AliITSRecPoint.h"
-#include "AliTPCtrack.h"
#include "AliESD.h"
#include "AliITSclusterV2.h"
#include "AliITStrackerV2.h"
fI=kMaxLayer;
fPass=0;
- fConstraint[0]=1; fConstraint[1]=0;
+ fConstraint[0]=1; fConstraint[1]=0;//-1;
Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
SetVertex(xyz,ers);
branch->SetAddress(&clusters);
Int_t j=0;
- Int_t detector=0;
for (Int_t i=0; i<kMaxLayer; i++) {
Int_t ndet=fgLayers[i].GetNdetectors();
Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
Int_t ncl=clusters->GetEntriesFast();
while (ncl--) {
AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
- 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));
- }
- }
-
}
- //
fgLayers[i].ResetRoad(); //road defined by the cluster density
}
delete t;
continue;
}
- if (TMath::Abs(t->GetD())>5) {
+ if (TMath::Abs(t->GetD())>4) {
delete t;
continue;
}
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++) {
- cerr<<fPass<<" "<<i<<'\r';
- fCurrentEsdTrack = i;
- AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
- 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();
- }
- }
-
- 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();
- }
-
- fBestTrack.SetLabel(tpcLabel);
- fBestTrack.CookdEdx();
- CookLabel(&fBestTrack,0.); //For comparison only
- fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
- //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
- cerr<<i<<'\r';
- 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 AliITStrackerV2::Clusters2Tracks(TTree *tpcTree, TTree *itsTree) {
- //--------------------------------------------------------------------
- // This functions reconstructs ITS tracks
- // The clusters must be already loaded !
- //--------------------------------------------------------------------
- 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");
- if (!branch) {
- Error("Clusters2Tracks","Can't get the branch !");
- return 1;
- }
- tpcTree->SetBranchAddress("tracks",&itrack);
- nentr=(Int_t)tpcTree->GetEntries();
-
- Info("Clusters2Tracks","Number of TPC tracks: %d\n",nentr);
-
- for (Int_t i=0; i<nentr; i++) {
- tpcTree->GetEvent(i);
- AliITStrackV2 *t=0;
- try {
- t=new AliITStrackV2(*itrack);
- } catch (const Char_t *msg) {
- Warning("Clusters2Tracks",msg);
- delete t;
- 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;
- }
-
- itsTracks.AddLast(t);
- }
- delete itrack;
- }
- itsTracks.Sort();
- nentr=itsTracks.GetEntriesFast();
-
-
- AliITStrackV2 *otrack=&fBestTrack;
- TBranch *branch=itsTree->GetBranch("tracks");
- if (!branch) itsTree->Branch("tracks","AliITStrackV2",&otrack,32000,3);
- else branch->SetAddress(&otrack);
+ 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++) {
if (fConstraint[fPass]) {
ResetTrackToFollow(*t);
- if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
+ if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
ResetBestTrack();
}
fBestTrack.SetLabel(tpcLabel);
fBestTrack.CookdEdx();
CookLabel(&fBestTrack,0.); //For comparison only
- itsTree->Fill();
- //UseClusters(&fBestTrack);
+ fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
+ UseClusters(&fBestTrack);
delete itsTracks.RemoveAt(i);
+ ntrk++;
}
}
- nentr=(Int_t)itsTree->GetEntries();
- Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr);
-
itsTracks.Delete();
+ Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
+
return 0;
}
//fTrackToFollow.CookdEdx();
CookLabel(&fTrackToFollow,0.); //For comparison only
fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
- //UseClusters(&fTrackToFollow);
+ UseClusters(&fTrackToFollow);
ntrk++;
}
delete t;
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;
+ 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,0.0); //For comparison only
+ CookLabel(&fTrackToFollow,0.); //For comparison only
if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
Double_t a=fTrackToFollow.GetAlpha();
if (fTrackToFollow.Propagate(fv+a,xv)) {
fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
- //UseClusters(&fTrackToFollow);
+ UseClusters(&fTrackToFollow);
{
AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
c.SetSigmaY2(GetSigmaY()*GetSigmaY());
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()){
- //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;
+ if (!TakeNextProlongation())
+ if (fLayersNotToSkip[fI]) return;
+
}
//deal with the best track
Int_t ncl=fTrackToFollow.GetNumberOfClusters();
Int_t nclb=fBestTrack.GetNumberOfClusters();
- 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)
+ if (ncl >= nclb) {
+ Double_t chi2=fTrackToFollow.GetChi2();
+ if (chi2/ncl < kChi2PerCluster) {
+ if (ncl > nclb || chi2 < fBestTrack.GetChi2()) {
+ ResetBestTrack();
}
- if ( (ncl == nclb) && chi2 < fBestTrack.GetChi2()) {
- ResetBestTrack();
- }
- }
- }
+ }
}
+
}
Int_t AliITStrackerV2::TakeNextProlongation() {
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();
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