//-------------------------------------------------------------------------
// 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>
-#include <iostream.h>
#include "AliITSgeom.h"
#include "AliITSRecPoint.h"
#include "AliTPCtrack.h"
+#include "AliESD.h"
#include "AliITSclusterV2.h"
#include "AliITStrackerV2.h"
-//#define DEBUG
-
-#ifdef DEBUG
-Int_t LAB=70201;
-#endif
+ClassImp(AliITStrackerV2)
-AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers
+AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; // ITS layers
-AliITStrackerV2::
-AliITStrackerV2(const AliITSgeom *geom, Int_t eventn) throw (const Char_t *) :
-AliTracker() {
+AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() {
//--------------------------------------------------------------------
- //This is the AliITStracker constructor
- //It also reads clusters from a root file
+ //This is the AliITStrackerV2 constructor
//--------------------------------------------------------------------
- fEventN=eventn; //MI change add event number - used to generate identifier
-
AliITSgeom *g=(AliITSgeom*)geom;
Float_t x,y,z;
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
Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
- Double_t r =-x*rot[1] + y*rot[0]; if (i==1) r=-r;
- Double_t phi=TMath::ATan2(rot[1],rot[0]); if (i==1) phi-=3.1415927;
- phi+=0.5*TMath::Pi();
- AliITSdetector &det=fLayers[i-1].GetDetector((j-1)*ndet + k-1);
-
-if (phi<0) phi += 2*TMath::Pi();
+ Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
+ phi+=TMath::Pi()/2;
+ if (i==1) phi+=TMath::Pi();
+ Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
+ Double_t r=x*cp+y*sp;
+ AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
new(&det) AliITSdetector(r,phi);
}
}
}
- try {
- //Read clusters
- //MI change
- char cname[100];
- sprintf(cname,"TreeC_ITS_%d",eventn);
- TTree *cTree=(TTree*)gDirectory->Get(cname);
+ fI=kMaxLayer;
- if (!cTree) throw
- ("AliITStrackerV2::AliITStrackerV2 can't get cTree !\n");
+ fPass=0;
+ fConstraint[0]=1; fConstraint[1]=0;
- TBranch *branch=cTree->GetBranch("Clusters");
- if (!branch) throw
- ("AliITStrackerV2::AliITStrackerV2 can't get Clusters branch !\n");
+ Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
+ SetVertex(xyz,ers);
- TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
- branch->SetAddress(&clusters);
+ for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
+ fLastLayerToTrackTo=kLastLayerToTrackTo;
- Int_t nentr=(Int_t)cTree->GetEntries();
- for (i=0; i<nentr; i++) {
- if (!cTree->GetEvent(i)) continue;
- Int_t lay,lad,det; g->GetModuleId(i,lay,lad,det);
- Int_t ncl=clusters->GetEntriesFast();
- while (ncl--) {
- AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
+}
-#ifdef DEBUG
-if (c->GetLabel(2)!=LAB)
-if (c->GetLabel(1)!=LAB)
-if (c->GetLabel(0)!=LAB) continue;
-cout<<lay-1<<' '<<lad-1<<' '<<det-1<<' '<<c->GetY()<<' '<<c->GetZ()<<endl;
-#endif
+void AliITStrackerV2::SetLayersNotToSkip(Int_t *l) {
+ //--------------------------------------------------------------------
+ //This function set masks of the layers which must be not skipped
+ //--------------------------------------------------------------------
+ for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
+}
- fLayers[lay-1].InsertCluster(new AliITSclusterV2(*c));
- }
- clusters->Delete();
- }
- delete cTree; //Thanks to Mariana Bondila
+Int_t AliITStrackerV2::LoadClusters(TTree *cTree) {
+ //--------------------------------------------------------------------
+ //This function loads ITS clusters
+ //--------------------------------------------------------------------
+ TBranch *branch=cTree->GetBranch("Clusters");
+ if (!branch) {
+ Error("LoadClusters"," can't get the branch !\n");
+ return 1;
}
- catch (const Char_t *msg) {
- cerr<<msg<<endl;
- throw;
+
+ TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
+ 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;
+ for (; j<jmax; j++) {
+ if (!cTree->GetEvent(j)) continue;
+ 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
}
- fI=kMaxLayer;
+ return 0;
+}
- fPass=0;
- fConstraint[0]=1; fConstraint[1]=0;
+void AliITStrackerV2::UnloadClusters() {
+ //--------------------------------------------------------------------
+ //This function unloads ITS clusters
+ //--------------------------------------------------------------------
+ for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
}
-//#ifdef DEBUG
-static Int_t lbl;
-//#endif
+static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) {
+ //--------------------------------------------------------------------
+ // Correction for the material between the TPC and the ITS
+ // (should it belong to the TPC code ?)
+ //--------------------------------------------------------------------
+ Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
+ Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
+ Double_t yr=12.8, dr=0.03; // rods ?
+ Double_t zm=0.2, dm=0.40; // membrane
+ //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
+ Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
+
+ if (t->GetX() > riw) {
+ if (!t->PropagateTo(riw,diw,x0iw)) return 1;
+ if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
+ if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
+ if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
+ //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
+ //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
+ if (!t->PropagateTo(rs,ds)) return 1;
+ } else if (t->GetX() < rs) {
+ if (!t->PropagateTo(rs,-ds)) return 1;
+ //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+0.001,-diw,x0iw)) return 1;
+ } else {
+ ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
+ return 1;
+ }
+
+ return 0;
+}
-Int_t AliITStrackerV2::Clusters2Tracks(const TFile *inp, TFile *out) {
+Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) {
//--------------------------------------------------------------------
- //This functions reconstructs ITS tracks
+ // This functions reconstructs ITS tracks
+ // The clusters must be already loaded !
//--------------------------------------------------------------------
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
+ TObjArray itsTracks(15000);
+
+ {/* Read ESD tracks */
+ Int_t nentr=event->GetNumberOfTracks();
+ Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
+ while (nentr--) {
+ AliESDtrack *esd=event->GetTrack(nentr);
+
+ if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
+ if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSin) continue;
+
+ AliITStrackV2 *t=0;
+ try {
+ t=new AliITStrackV2(*esd);
+ } catch (const Char_t *msg) {
+ Warning("Clusters2Tracks",msg);
+ delete t;
+ continue;
+ }
+ if (TMath::Abs(t->GetD())>5) {
+ delete t;
+ continue;
+ }
+
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("Clusters2Tracks",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
+ }
+ t->fReconstructed = kFALSE;
+ itsTracks.AddLast(t);
+ }
+ } /* End Read ESD tracks */
- if (!in->IsOpen()) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): ";
- cerr<<"file with TPC tracks is not open !\n";
- return 1;
+ 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->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
+ 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);
+ }
+ //
- if (!out->IsOpen()) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): ";
- cerr<<"file for ITS tracks is not open !\n";
- return 2;
+ 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);
}
- in->cd();
-
- char tname[100];
+ 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 */
- sprintf(tname,"TreeT_TPC_%d",fEventN);
- TTree *tpcTree=(TTree*)in->Get(tname);
- if (!tpcTree) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): "
- "can't get a tree with TPC tracks !\n";
- return 3;
- }
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) {
- cerr<<msg<<endl;
+ Warning("Clusters2Tracks",msg);
delete t;
continue;
}
- if (TMath::Abs(t->GetD())>4) continue;
+ if (TMath::Abs(t->GetD())>4) {
+ delete t;
+ continue;
+ }
- t->PropagateTo(80.,0.0053);
- if (TMath::Abs(t->GetY())>13.) t->CorrectForMaterial(0.03);
- if (TMath::Abs(t->GetZ())<0.2) t->CorrectForMaterial(0.40);
- t->PropagateTo(61.,0.0052);
- Double_t xk=52.,x,y,z; t->GetGlobalXYZat(xk,x,y,z);
- if (TMath::Abs(y)<7.77) t->PropagateTo(xk,0.19,24.);
- t->PropagateTo(50.,0.001);
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("Clusters2Tracks",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
+ }
itsTracks.AddLast(t);
}
- delete tpcTree; //Thanks to Mariana Bondila
delete itrack;
}
itsTracks.Sort();
+ nentr=itsTracks.GetEntriesFast();
- out->cd();
- sprintf(tname,"TreeT_ITS_%d",fEventN);
- TTree itsTree(tname,"Tree with ITS tracks");
AliITStrackV2 *otrack=&fBestTrack;
- itsTree.Branch("tracks","AliITStrackV2",&otrack,32000,0);
+ TBranch *branch=itsTree->GetBranch("tracks");
+ if (!branch) itsTree->Branch("tracks","AliITStrackV2",&otrack,32000,3);
+ else branch->SetAddress(&otrack);
for (fPass=0; fPass<2; fPass++) {
Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
for (Int_t i=0; i<nentr; i++) {
- if (i%10==0) cerr<<nentr-i<<" \r";
AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
if (t==0) continue; //this track has been already tracked
Int_t tpcLabel=t->GetLabel(); //save the TPC track label
-lbl=tpcLabel;
-#ifdef DEBUG
-lbl=tpcLabel;
-if (TMath::Abs(tpcLabel)!=LAB) continue;
-cout<<tpcLabel<<" *****************\n";
-#endif
-
ResetTrackToFollow(*t);
ResetBestTrack();
while (TakeNextProlongation()) FollowProlongation();
}
-#ifdef DEBUG
-cout<<fBestTrack.GetNumberOfClusters()<<" number of clusters\n\n";
-#endif
+ if (fBestTrack.GetNumberOfClusters() == 0) continue;
- if (fBestTrack.GetNumberOfClusters() < kMaxLayer-kLayersToSkip) continue;
-
- if (fConstraint[fPass]) {
- Int_t index[kMaxLayer];
- Int_t k;
- for (k=0; k<kMaxLayer; k++) index[k]=-1;
- Int_t nc=fBestTrack.GetNumberOfClusters();
- for (k=0; k<nc; k++) {
- Int_t idx=fBestTrack.GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
- index[nl]=idx;
- }
- fBestTrack.~AliITStrackV2(); new(&fBestTrack) AliITStrackV2(*t);
- if (!RefitAt(3.7, &fBestTrack, index)) continue;
- }
-
- fBestTrack.SetLabel(tpcLabel);
- fBestTrack.CookdEdx();
- CookLabel(&fBestTrack,0.); //For comparison only
- itsTree.Fill();
- UseClusters(&fBestTrack);
- delete itsTracks.RemoveAt(i);
+ if (fConstraint[fPass]) {
+ ResetTrackToFollow(*t);
+ if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
+ ResetBestTrack();
+ }
+ fBestTrack.SetLabel(tpcLabel);
+ fBestTrack.CookdEdx();
+ CookLabel(&fBestTrack,0.); //For comparison only
+ itsTree->Fill();
+ //UseClusters(&fBestTrack);
+ delete itsTracks.RemoveAt(i);
}
}
- itsTree.Write();
+ nentr=(Int_t)itsTree->GetEntries();
+ Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr);
itsTracks.Delete();
- savedir->cd();
- cerr<<"Number of TPC tracks: "<<nentr<<endl;
- cerr<<"Number of prolonged tracks: "<<itsTree.GetEntries()<<endl;
return 0;
}
-Int_t AliITStrackerV2::PropagateBack(const TFile *inp, TFile *out) {
+Int_t AliITStrackerV2::PropagateBack(AliESD *event) {
//--------------------------------------------------------------------
- //This functions propagates reconstructed ITS tracks back
+ // This functions propagates reconstructed ITS tracks back
+ // The clusters must be loaded !
//--------------------------------------------------------------------
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
+ Int_t nentr=event->GetNumberOfTracks();
+ Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
- if (!in->IsOpen()) {
- cerr<<"AliITStrackerV2::PropagateBack(): ";
- cerr<<"file with ITS tracks is not open !\n";
- return 1;
- }
+ Int_t ntrk=0;
+ for (Int_t i=0; i<nentr; i++) {
+ AliESDtrack *esd=event->GetTrack(i);
+
+ if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSout) continue;
+
+ AliITStrackV2 *t=0;
+ try {
+ t=new AliITStrackV2(*esd);
+ } catch (const Char_t *msg) {
+ Warning("PropagateBack",msg);
+ delete t;
+ continue;
+ }
- if (!out->IsOpen()) {
- cerr<<"AliITStrackerV2::PropagateBack(): ";
- cerr<<"file for back propagated ITS tracks is not open !\n";
- return 2;
- }
+ ResetTrackToFollow(*t);
- in->cd();
- TTree *itsTree=(TTree*)in->Get("TreeT_ITS_0");
- if (!itsTree) {
- cerr<<"AliITStrackerV2::PropagateBack() ";
- cerr<<"can't get a tree with ITS tracks !\n";
- return 3;
+ // propagete to vertex [SR, GSI 17.02.2003]
+ // 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)) {
+ if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
+ Warning("PropagateBack",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
+ }
+ fTrackToFollow.SetLabel(t->GetLabel());
+ //fTrackToFollow.CookdEdx();
+ CookLabel(&fTrackToFollow,0.); //For comparison only
+ fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
+ //UseClusters(&fTrackToFollow);
+ ntrk++;
+ }
+ delete t;
}
- AliITStrackV2 *itrack=new AliITStrackV2;
- itsTree->SetBranchAddress("tracks",&itrack);
- out->cd();
- TTree backTree("TreeT_ITSb_0","Tree with back propagated ITS tracks");
- AliTPCtrack *otrack=0;
- backTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
+ Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
- Int_t ntrk=0;
+ return 0;
+}
- Int_t nentr=(Int_t)itsTree->GetEntries();
+Int_t AliITStrackerV2::RefitInward(AliESD *event) {
+ //--------------------------------------------------------------------
+ // This functions refits ITS tracks using the
+ // "inward propagated" TPC tracks
+ // The clusters must be loaded !
+ //--------------------------------------------------------------------
+ Int_t nentr=event->GetNumberOfTracks();
+ Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
+
+ Int_t ntrk=0;
for (Int_t i=0; i<nentr; i++) {
- itsTree->GetEvent(i);
- ResetTrackToFollow(*itrack);
- fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
- Int_t itsLabel=fTrackToFollow.GetLabel(); //save the ITS track label
+ AliESDtrack *esd=event->GetTrack(i);
-#ifdef DEBUG
-if (TMath::Abs(itsLabel)!=LAB) continue;
-cout<<itsLabel<<" *****************\n";
-#endif
+ 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 {
- Int_t nc=itrack->GetNumberOfClusters();
-#ifdef DEBUG
-for (Int_t k=0; k<nc; k++) {
- Int_t index=itrack->GetClusterIndex(k);
- AliITSclusterV2 *c=(AliITSclusterV2*)GetCluster(index);
- cout<<c->GetLabel(0)<<' '<<c->GetLabel(1)<<' '<<c->GetLabel(2)<<endl;
-}
-#endif
- Int_t idx=0, l=0;
- const AliITSclusterV2 *c=0;
- if (nc--) {
- idx=itrack->GetClusterIndex(nc); l=(idx&0xf0000000)>>28;
- c=(AliITSclusterV2*)GetCluster(idx);
- }
- for (fI=0; fI<kMaxLayer; fI++) {
- AliITSlayer &layer=fLayers[fI];
- Double_t r=layer.GetR();
- if (fI==2 || fI==4) {
- Double_t rs=0.5*(fLayers[fI-1].GetR() + r);
- Double_t ds=0.034; if (fI==4) ds=0.039;
- Double_t dx0r=ds/21.82*2.33, dr=ds*2.33;
- if (!fTrackToFollow.PropagateTo(rs,1*dx0r,dr)) throw "";
- }
-
- Double_t x,y,z;
- if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z))
- throw "AliITStrackerV2::PropagateBack: failed to estimate track !";
- Double_t phi=TMath::ATan2(y,x);
- Int_t idet=layer.FindDetectorIndex(phi,z);
- if (idet<0)
- throw "AliITStrackerV2::PropagateBack: failed to find a detector !\n";
- const AliITSdetector &det=layer.GetDetector(idet);
- r=det.GetR(); phi=det.GetPhi();
- if (!fTrackToFollow.Propagate(phi,r)) throw "";
- fTrackToFollow.SetDetectorIndex(idet);
-
- const AliITSclusterV2 *cl=0;
- Int_t index=0;
- Double_t maxchi2=kMaxChi2;
-
- if (l==fI) {
- idet=c->GetDetectorIndex();
- if (idet != fTrackToFollow.GetDetectorIndex()) {
- const AliITSdetector &det=layer.GetDetector(idet);
- r=det.GetR(); phi=det.GetPhi();
- if (!fTrackToFollow.Propagate(phi,r)) throw "";
- fTrackToFollow.SetDetectorIndex(idet);
- }
- Double_t chi2=fTrackToFollow.GetPredictedChi2(c);
- if (chi2<kMaxChi2) {
- cl=c; maxchi2=chi2; index=idx;
- }
- if (nc--) {
- idx=itrack->GetClusterIndex(nc); l=(idx&0xf0000000)>>28;
- c=(AliITSclusterV2*)GetCluster(idx);
- }
- }
+ t=new AliITStrackV2(*esd);
+ } catch (const Char_t *msg) {
+ Warning("RefitInward",msg);
+ delete t;
+ continue;
+ }
- if (fTrackToFollow.GetNumberOfClusters()>2) {
- Double_t dz=3*TMath::Sqrt(fTrackToFollow.GetSigmaZ2()+kSigmaZ2[fI]);
- Double_t dy=3*TMath::Sqrt(fTrackToFollow.GetSigmaY2()+kSigmaY2[fI]);
- Double_t zmin=fTrackToFollow.GetZ() - dz;
- Double_t zmax=fTrackToFollow.GetZ() + dz;
- Double_t ymin=fTrackToFollow.GetY() + phi*r - dy;
- Double_t ymax=fTrackToFollow.GetY() + phi*r + dy;
- layer.SelectClusters(zmin,zmax,ymin,ymax);
-
- const AliITSclusterV2 *cc=0; Int_t ci;
- while ((cc=layer.GetNextCluster(ci))!=0) {
- idet=cc->GetDetectorIndex();
- if (idet != fTrackToFollow.GetDetectorIndex()) continue;
- Double_t chi2=fTrackToFollow.GetPredictedChi2(cc);
- if (chi2<maxchi2) {
- cl=cc; index=(fI<<28)+ci; maxchi2=chi2;
- }
- }
- }
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("RefitInward",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
+ }
- if (cl) {
- if (!fTrackToFollow.Update(cl,maxchi2,index))
- cerr<<"AliITStrackerV2::PropagateBack: filtering failed !\n";
+ 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
+
+ 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++;
}
-
- x=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ());
- fTrackToFollow.CorrectForMaterial(-x);
-
}
-
- Double_t xk=52.,x,y,z; fTrackToFollow.GetGlobalXYZat(xk,x,y,z);
- if (TMath::Abs(y)<7.77)
- fTrackToFollow.PropagateTo(xk,-0.19,24.);
- fTrackToFollow.PropagateTo(61,-0.0110);
- fTrackToFollow.PropagateTo(80.,-0.0053);
-
- fTrackToFollow.SetLabel(itsLabel);
- otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha());
- backTree.Fill(); delete otrack;
- UseClusters(&fTrackToFollow);
- cerr << ++ntrk << " \r";
- }
- catch (const Char_t *msg) {
- cerr<<msg<<endl;
}
+ delete t;
}
- backTree.Write();
- savedir->cd();
- cerr<<"Number of ITS tracks: "<<nentr<<endl;
- cerr<<"Number of back propagated ITS tracks: "<<ntrk<<endl;
-
- delete itrack;
-
- delete itsTree; //Thanks to Mariana Bondila
+ Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
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);
}
//--------------------------------------------------------------------
//This function finds a track prolongation
//--------------------------------------------------------------------
- Int_t tryAgain=kLayersToSkip;
-
- while (fI) {
+ while (fI>fLastLayerToTrackTo) {
Int_t i=fI-1;
-#ifdef DEBUG
-cout<<i<<' ';
-#endif
- 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 d=0.011; if (i==3) d=0.0053;
- if (!fTrackToFollow.PropagateTo(rs,d)) {
- //cerr<<"AliITStrackerV2::FollowProlongation: "
- //"propagation failed !\n";
- break;
+ 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)) {
+ //Warning("FollowProlongation","propagation failed !\n");
+ return;
}
}
//find intersection
Double_t x,y,z;
if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) {
- //cerr<<"AliITStrackerV2::FollowProlongation: "
- //"failed to estimate track !\n";
- break;
+ //Warning("FollowProlongation","failed to estimate track !\n");
+ return;
}
Double_t phi=TMath::ATan2(y,x);
+
Int_t idet=layer.FindDetectorIndex(phi,z);
if (idet<0) {
- //cerr<<"AliITStrackerV2::FollowProlongation: "
- //"failed to find a detector !\n";
- break;
+ //Warning("FollowProlongation","failed to find a detector !\n");
+ return;
}
//propagate to the intersection
const AliITSdetector &det=layer.GetDetector(idet);
phi=det.GetPhi();
if (!fTrackToFollow.Propagate(phi,det.GetR())) {
- //cerr<<"AliITStrackerV2::FollowProlongation: propagation failed !\n";
- break;
+ //Warning("FollowProlongation","propagation failed !\n");
+ return;
}
fTrackToFollow.SetDetectorIndex(idet);
//Select possible prolongations and store the current track estimation
track.~AliITStrackV2(); new(&track) AliITStrackV2(fTrackToFollow);
- Double_t dz=3*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]);
+ Double_t dz=7*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]);
+ Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]);
+ Double_t road=layer.GetRoad();
+ if (dz*dy>road*road) {
+ Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd;
+ dz=road*scz; dy=road*scy;
+ }
+
+ //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + kSigmaZ2[i]);
if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl());
if (dz > kMaxRoad) {
- //cerr<<"AliITStrackerV2::FollowProlongation: too broad road in Z !\n";
- break;
+ //Warning("FollowProlongation","too broad road in Z !\n");
+ return;
}
- if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) break;
+ // if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
- Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]);
+ //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) {
- //cerr<<"AliITStrackerV2::FollowProlongation: too broad road in Y !\n";
- break;
+ //Warning("FollowProlongation","too broad road in Y !\n");
+ return;
}
Double_t zmin=track.GetZ() - dz;
fI--;
//take another prolongation
- if (!TakeNextProlongation()) if (!tryAgain--) break;
- tryAgain=kLayersToSkip;
-
+ 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=4*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]);
- Double_t dy=4*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]);
+ Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]);
+ Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + kSigmaY2[fI]);
+ Double_t road=layer.GetRoad();
+ if (dz*dy>road*road) {
+ Double_t dd=TMath::Sqrt(dz*dy), scz=dz/dd, scy=dy/dd;
+ dz=road*scz; dy=road*scy;
+ }
const AliITSclusterV2 *c=0; Int_t ci=-1;
Double_t chi2=12345.;
while ((c=layer.GetNextCluster(ci))!=0) {
- //if (c->GetLabel(0)!=TMath::Abs(lbl)) continue;
Int_t idet=c->GetDetectorIndex();
-
if (fTrackToFollow.GetDetectorIndex()!=idet) {
const AliITSdetector &det=layer.GetDetector(idet);
ResetTrackToFollow(fTracks[fI]);
if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) {
- //cerr<<"AliITStrackerV2::TakeNextProlongation: "
- //"propagation failed !\n";
+ //Warning("TakeNextProlongation","propagation failed !\n");
continue;
}
fTrackToFollow.SetDetectorIndex(idet);
if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue;
-
-#ifdef DEBUG
-cout<<fI<<" change detector !\n";
-#endif
-
}
if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue;
chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break;
}
-#ifdef DEBUG
-cout<<fI<<" chi2="<<chi2<<' '
- <<fTrackToFollow.GetY()<<' '<<fTrackToFollow.GetZ()<<' '
- <<dy<<' '<<dz<<endl;
-#endif
-
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)) {
- //cerr<<"AliITStrackerV2::TakeNextProlongation: filtering failed !\n";
+ //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;
SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b.
{
- Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ());
- fTrackToFollow.CorrectForMaterial(d);
+ Double_t x0;
+ Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0);
+ fTrackToFollow.CorrectForMaterial(d,x0);
}
if (fConstraint[fPass]) {
Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
- fTrackToFollow.Improve(d,GetY(),GetZ());
+ 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);
}
-#ifdef DEBUG
-cout<<"accepted lab="<<c->GetLabel(0)<<' '
- <<fTrackToFollow.GetNumberOfClusters()<<' '
- <<fTrackToFollow.GetY()<<' '<<fTrackToFollow.GetZ()<<' '
- <<fTrackToFollow.Get1Pt()<<endl<<endl;
-#endif
-
return 1;
}
fN=0;
fI=0;
+
+ fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
}
AliITStrackerV2::AliITSlayer::~AliITSlayer() {
//--------------------------------------------------------------------
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
+ //--------------------------------------------------------------------
+ Int_t n=0;
+ for (Int_t i=0; i<fN; i++) {
+ if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
+ }
+ if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
}
Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
//This function adds a cluster to this layer
//--------------------------------------------------------------------
if (fN==kMaxClusterPerLayer) {
- cerr<<"AliITStrackerV2::AliITSlayer::InsertCluster(): "
- "Too many clusters !\n";
- return 1;
+ ::Error("InsertCluster","Too many clusters !\n");
+ return 1;
}
if (fN==0) {fClusters[fN++]=c; return 0;}
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();
//--------------------------------------------------------------------
//This function finds the detector crossed by the track
//--------------------------------------------------------------------
- Double_t dphi=phi-fPhiOffset;
+ Double_t dphi=-(phi-fPhiOffset);
if (dphi < 0) dphi += 2*TMath::Pi();
else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
-
- Double_t dz=fZOffset-z;
- Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
-
if (np>=fNladders) np-=fNladders;
if (np<0) np+=fNladders;
-#ifdef DEBUG
-cout<<np<<' '<<nz<<endl;
-#endif
+ Double_t dz=fZOffset-z;
+ Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
+ if (nz>=fNdetectors) return -1;
+ if (nz<0) return -1;
return np*fNdetectors + nz;
}
Double_t
-AliITStrackerV2::AliITSlayer::GetThickness(Double_t y, Double_t z) const {
+AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
+const {
//--------------------------------------------------------------------
//This function returns the layer thickness at this point (units X0)
//--------------------------------------------------------------------
Double_t d=0.0085;
+ x0=21.82;
if (43<fR&&fR<45) { //SSD2
- d=0.0036;
- if (TMath::Abs(y-0.00)>3.40) d+=0.0036;
- if (TMath::Abs(y-2.50)<0.10) d+=(0.02-0.0036);
- if (TMath::Abs(y+1.90)<0.10) d+=(0.02-0.0036);
+ Double_t dd=0.0034;
+ d=dd;
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
+ if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
for (Int_t i=0; i<12; i++) {
- if (TMath::Abs(z-3.6*(i+0.5))<0.20) {d+=0.0036; break;}
- if (TMath::Abs(z+3.6*(i+0.5))<0.20) {d+=0.0036; break;}
- if (TMath::Abs(z-3.6*(i+0.929))<0.50) {d+=(0.02-0.0036); break;}
- if (TMath::Abs(z+3.6*(i+0.104))<0.50) {d+=(0.02-0.0036); break;}
+ if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ d+=0.0034;
+ break;
+ }
+ if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ d+=0.0034;
+ break;
+ }
+ if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
+ if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
}
} else
if (37<fR&&fR<41) { //SSD1
- d=0.0036;
- if (TMath::Abs(y-0.00)>3.40) d+=0.0036;
- if (TMath::Abs(y-2.20)<0.10) d+=(0.02-0.0036);
- if (TMath::Abs(y+2.20)<0.10) d+=(0.02-0.0036);
+ Double_t dd=0.0034;
+ d=dd;
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
+ if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
for (Int_t i=0; i<11; i++) {
- if (TMath::Abs(z-3.6*i)<0.20) {d+=0.0036; break;}
- if (TMath::Abs(z+3.6*i)<0.20) {d+=0.0036; break;}
- if (TMath::Abs(z-3.6*(i+0.54))<0.50) {d+=(0.02-0.0036); break;}
- if (TMath::Abs(z+3.6*(i+0.58))<0.50) {d+=(0.02-0.0036); break;}
+ if (TMath::Abs(z-3.9*i)<0.15) {
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ d+=dd;
+ break;
+ }
+ if (TMath::Abs(z+3.9*i)<0.15) {
+ if (TMath::Abs(y-0.00)>3.40) d+=dd;
+ d+=dd;
+ break;
+ }
+ if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
+ if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
}
} else
if (13<fR&&fR<26) { //SDD
- d=0.0034;
- if (TMath::Abs(y-0.00)>3.30) d+=0.0034;
- if (TMath::Abs(y-2.10)<0.20) d+=0.0034*3;
- if (TMath::Abs(y+2.10)<0.20) d+=0.0034*3;
- for (Int_t i=0; i<4; i++) {
- if (TMath::Abs(z-7.3*i)<0.60) {d+=0.0034; break;}
- if (TMath::Abs(z+7.3*i)<0.60) {d+=0.0034; break;}
+ Double_t dd=0.0033;
+ d=dd;
+ if (TMath::Abs(y-0.00)>3.30) d+=dd;
+
+ if (TMath::Abs(y-1.80)<0.55) {
+ d+=0.016;
+ for (Int_t j=0; j<20; j++) {
+ if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
+ if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
+ }
+ }
+ if (TMath::Abs(y+1.80)<0.55) {
+ d+=0.016;
+ for (Int_t j=0; j<20; j++) {
+ if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
+ if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
+ }
+ }
+
+ for (Int_t i=0; i<4; i++) {
+ if (TMath::Abs(z-7.3*i)<0.60) {
+ d+=dd;
+ if (TMath::Abs(y-0.00)>3.30) d+=dd;
+ break;
+ }
+ if (TMath::Abs(z+7.3*i)<0.60) {
+ d+=dd;
+ if (TMath::Abs(y-0.00)>3.30) d+=dd;
+ break;
+ }
}
} else
if (6<fR&&fR<8) { //SPD2
- d=0.0093;
- if (TMath::Abs(y-3.08)>0.45) d+=0.0064;
- if (TMath::Abs(y-3.03)<0.10) d+=0.0192;
+ Double_t dd=0.0063; x0=21.5;
+ d=dd;
+ if (TMath::Abs(y-3.08)>0.5) d+=dd;
+ //if (TMath::Abs(y-3.08)>0.45) d+=dd;
+ if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
} else
if (3<fR&&fR<5) { //SPD1
- d=0.0093;
- if (TMath::Abs(y+0.21)>0.55) d+=0.0064;
- if (TMath::Abs(y+0.10)<0.10) d+=0.0192;
+ Double_t dd=0.0063; x0=21.5;
+ d=dd;
+ if (TMath::Abs(y+0.21)>0.6) d+=dd;
+ //if (TMath::Abs(y+0.21)>0.45) d+=dd;
+ if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
}
- d+=0.002;
-
return d;
}
//--------------------------------------------------------------------
//Returns the thickness between the current layer and the vertex (units X0)
//--------------------------------------------------------------------
- Double_t d=0.1/65.19*1.848;
+ 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)*xi*xi;
+ Double_t xi=fgLayers[i].GetR();
+ d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
}
if (fI>1) {
- Double_t xi=0.5*(fLayers[1].GetR()+fLayers[2].GetR());
- d+=0.011*xi*xi;
+ Double_t xi=9.;
+ d+=0.0097*xi*xi;
}
if (fI>3) {
- Double_t xi=0.5*(fLayers[3].GetR()+fLayers[4].GetR());
- d+=0.0053*xi*xi;
+ Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
+ d+=0.0034*xi*xi;
}
+
return d/(xn*xn);
}
-
-
Int_t AliITStrackerV2::AliITSlayer::InRoad() const {
//--------------------------------------------------------------------
// This function returns number of clusters within the "window"
return ncl;
}
-Bool_t AliITStrackerV2::RefitAt(Double_t x, AliITStrackV2 *t, Int_t *index) {
+Bool_t
+AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,const AliITStrackV2 *c) {
//--------------------------------------------------------------------
- // This function refits a track at a given position
+ // This function refits the track "t" at the position "x" using
+ // the clusters from "c"
//--------------------------------------------------------------------
+ Int_t index[kMaxLayer];
+ Int_t k;
+ for (k=0; k<kMaxLayer; k++) index[k]=-1;
+ Int_t nc=c->GetNumberOfClusters();
+ for (k=0; k<nc; k++) {
+ Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
+ index[nl]=idx;
+ }
+
Int_t from, to, step;
- if (x > t->GetX()) {
+ if (xx > t->GetX()) {
from=0; to=kMaxLayer;
step=+1;
} else {
}
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 (hI==1.5 || hI==3.5) {
- Double_t rs=0.5*(fLayers[i-step].GetR() + r);
- Double_t ds=0.011; if (hI==3.5) ds=0.0053;
- if (!t->PropagateTo(rs,ds)) {
+ if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
+ 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 kFALSE;
}
}
}
+ // remember old position [SR, GSI 18.02.2003]
+ Double_t oldX=0., oldY=0., oldZ=0.;
+ if (t->IsStartedTimeIntegral() && step==1) {
+ t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
+ }
+ //
+
Double_t x,y,z;
if (!t->GetGlobalXYZat(r,x,y,z)) {
return kFALSE;
t->SetDetectorIndex(idet);
}
Double_t chi2=t->GetPredictedChi2(c);
- if (chi2<maxchi2) { cl=c; maxchi2=chi2; }
- else return kFALSE;
+ if (chi2<maxchi2) {
+ cl=c;
+ maxchi2=chi2;
+ } else {
+ return kFALSE;
+ }
}
-
/*
if (cl==0)
if (t->GetNumberOfClusters()>2) {
}
}
*/
-
if (cl) {
if (!t->Update(cl,maxchi2,idx)) {
return kFALSE;
}
+ t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
}
{
- Double_t d=layer.GetThickness(t->GetY(),t->GetZ());
- t->CorrectForMaterial(-step*d);
+ Double_t x0;
+ Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
+ t->CorrectForMaterial(-step*d,x0);
}
+
+ // track time update [SR, GSI 17.02.2003]
+ if (t->IsStartedTimeIntegral() && step==1) {
+ Double_t newX, newY, newZ;
+ t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
+ Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
+ (oldZ-newZ)*(oldZ-newZ);
+ t->AddTimeStep(TMath::Sqrt(dL2));
+ }
+ //
}
- if (!t->PropagateTo(x,0.,0.)) return kFALSE;
+ if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
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
+ //--------------------------------------------------------------------
+ AliTracker::UseClusters(t,from);
+
+ AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
+ //if (c->GetQ()>2) c->Use();
+ if (c->GetSigmaZ2()>0.1) c->Use();
+ c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
+ //if (c->GetQ()>2) c->Use();
+ 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