//-------------------------------------------------------------------------
// 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 <TFile.h>
#include <TTree.h>
#include <TRandom.h>
-#include <iostream.h>
#include "AliITSgeom.h"
#include "AliITSRecPoint.h"
-#include "../TPC/AliTPCtrack.h"
+#include "AliTPCtrack.h"
+#include "AliESD.h"
#include "AliITSclusterV2.h"
#include "AliITStrackerV2.h"
-//#define DEBUG
-
-#ifdef DEBUG
-Int_t LAB=236;
-#endif
+ClassImp(AliITStrackerV2)
-extern TRandom *gRandom;
+AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; // ITS layers
-AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers
-
-AliITStrackerV2::
-AliITStrackerV2(const AliITSgeom *geom) throw (const Char_t *) {
+AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() {
//--------------------------------------------------------------------
- //This is the AliITStracker constructor
- //It also reads clusters from a root file
+ //This is the AliITStrackerV2 constructor
//--------------------------------------------------------------------
- fYV=fZV=0.;
-
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
- TTree *cTree=(TTree*)gDirectory->Get("cTree");
- if (!cTree) throw
- ("AliITStrackerV2::AliITStrackerV2 can't get cTree !\n");
-
- TBranch *branch=cTree->GetBranch("Clusters");
- if (!branch) throw
- ("AliITStrackerV2::AliITStrackerV2 can't get Clusters branch !\n");
-
- TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
- branch->SetAddress(&clusters);
-
- 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-1,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
-
- fLayers[lay-1].InsertCluster(new AliITSclusterV2(*c));
- }
- clusters->Delete();
- }
+ fI=kMaxLayer;
+
+ fPass=0;
+ fConstraint[0]=1; fConstraint[1]=0;
+
+ Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
+ SetVertex(xyz,ers);
+
+ for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
+ fLastLayerToTrackTo=kLastLayerToTrackTo;
+
+}
+
+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];
+}
+
+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;
+ 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);
+ fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
+ }
+ clusters->Delete();
+ }
+ fgLayers[i].ResetRoad(); //road defined by the cluster density
}
- fI=kMaxLayer;
+ return 0;
}
-static Int_t lbl;
-
-Int_t AliITStrackerV2::Clusters2Tracks(const TFile *inp, TFile *out) {
+void AliITStrackerV2::UnloadClusters() {
//--------------------------------------------------------------------
- //This functions reconstructs ITS tracks
+ //This function unloads ITS clusters
//--------------------------------------------------------------------
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
+ for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
+}
- if (!in->IsOpen()) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): ";
- cerr<<"file with TPC tracks is not open !\n";
- return 1;
+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;
+}
- if (!out->IsOpen()) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): ";
- cerr<<"file for ITS tracks is not open !\n";
- return 2;
+Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) {
+ //--------------------------------------------------------------------
+ // This functions reconstructs ITS tracks
+ // The clusters must be already loaded !
+ //--------------------------------------------------------------------
+ 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())>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);
+ }
+ } /* End Read ESD tracks */
+
+ itsTracks.Sort();
+ Int_t nentr=itsTracks.GetEntriesFast();
+
+ 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++) {
+ 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
+
+ ResetTrackToFollow(*t);
+ ResetBestTrack();
+
+ for (FollowProlongation(); fI<kMaxLayer; fI++) {
+ while (TakeNextProlongation()) FollowProlongation();
+ }
+
+ 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++;
+ }
}
- in->cd();
- TTree *tpcTree=(TTree*)in->Get("TreeT");
- if (!tpcTree) {
- cerr<<"AliITStrackerV2::Clusters2Tracks() ";
- cerr<<"can't get a tree with TPC tracks !\n";
- return 3;
+ itsTracks.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();
- AliTPCtrack *itrack=new AliTPCtrack;
- tpcTree->SetBranchAddress("tracks",&itrack);
- out->cd();
- TTree itsTree("TreeT","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++) {
+ 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
+
+ ResetTrackToFollow(*t);
+ ResetBestTrack();
+
+ for (FollowProlongation(); fI<kMaxLayer; fI++) {
+ while (TakeNextProlongation()) FollowProlongation();
+ }
- Int_t ntrk=0;
+ 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
+ itsTree->Fill();
+ UseClusters(&fBestTrack);
+ delete itsTracks.RemoveAt(i);
+ }
+ }
+
+ nentr=(Int_t)itsTree->GetEntries();
+ Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr);
+
+ itsTracks.Delete();
+
+ return 0;
+}
+
+Int_t AliITStrackerV2::PropagateBack(AliESD *event) {
+ //--------------------------------------------------------------------
+ // This functions propagates reconstructed ITS tracks back
+ // The clusters must be loaded !
+ //--------------------------------------------------------------------
+ Int_t nentr=event->GetNumberOfTracks();
+ Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
- Int_t nentr=(Int_t)tpcTree->GetEntries();
+ 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;
+ }
+
+ ResetTrackToFollow(*t);
- if (!tpcTree->GetEvent(i)) continue;
- Int_t tpcLabel=itrack->GetLabel(); //save the TPC track label
-lbl=tpcLabel;
+ // 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;
+ }
-#ifdef DEBUG
-if (TMath::Abs(tpcLabel)!=LAB) continue;
-cout<<tpcLabel<<" *****************\n";
-#endif
+ Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
+ return 0;
+}
+
+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++) {
+ AliESDtrack *esd=event->GetTrack(i);
+
+ if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
+ if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
+ if (esd->GetStatus()&AliESDtrack::kTPCout)
+ if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
+
+ AliITStrackV2 *t=0;
try {
- ResetTrackToFollow(AliITStrackV2(*itrack));
+ t=new AliITStrackV2(*esd);
} catch (const Char_t *msg) {
- cerr<<msg<<endl;
- continue;
- }
- ResetBestTrack();
-
- fYV=gRandom->Gaus(0.,kSigmaYV); fZV=gRandom->Gaus(0.,kSigmaZV);
-
- Double_t r2=fTrackToFollow.GetX()*fTrackToFollow.GetX();
- Double_t x0=0.082/21.82*2.33*(45*45+40*40)/r2+2.000/41.28*0.03*75*75/r2;
- fTrackToFollow.Improve(x0,fYV,fZV);
-
- //Double_t xk=77.2;
- Double_t xk=88.;
- fTrackToFollow.PropagateTo(xk,0.,0.); //Ne if it's still there
-
- xk-=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/44.77*1.71, 0.005*1.71); //Tedlar
- xk-=0.02;
- fTrackToFollow.PropagateTo(xk, 0.02/44.86*1.45, 0.02*1.45); //Kevlar
- xk-=2.0;
- fTrackToFollow.PropagateTo(xk, 2.0/41.28*0.029, 2.0*0.029);//Nomex
- xk-=0.02;
- fTrackToFollow.PropagateTo(xk, 0.02/44.86*1.45, 0.02*1.45); //Kevlar
- xk-=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/44.77*1.71, 0.005*1.71); //Tedlar
-
- xk-=14.5;
- fTrackToFollow.PropagateTo(xk,0.,0.); //C02
-
- xk -=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/24.01*2.7, 0.005*2.7); //Al
- xk -=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/44.77*1.71, 0.005*1.71); //Tedlar
- xk -=0.02;
- fTrackToFollow.PropagateTo(xk, 0.02/44.86*1.45, 0.02*1.45); //Kevlar
- xk -=0.5;
- fTrackToFollow.PropagateTo(xk, 0.5/41.28*.029, 0.5*0.029); //Nomex
- xk -=0.02;
- fTrackToFollow.PropagateTo(xk, 0.02/44.86*1.45, 0.02*1.45); //Kevlar
- xk -=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/44.77*1.71, 0.005*1.71); //Tedlar
- xk -=0.005;
- fTrackToFollow.PropagateTo(xk, 0.005/24.01*2.7, 0.005*2.7); //Al
-
-
- for (FollowProlongation(); fI<kMaxLayer; fI++) {
- while (TakeNextProlongation()) FollowProlongation();
+ Warning("RefitInward",msg);
+ delete t;
+ continue;
}
-#ifdef DEBUG
-cout<<fBestTrack.GetNumberOfClusters()<<" number of clusters\n\n";
-#endif
-
- if (fBestTrack.GetNumberOfClusters() >= kMaxLayer-kLayersToSkip) {
- cerr << ++ntrk << " \r";
- fBestTrack.SetLabel(tpcLabel);
- UseClusters(&fBestTrack);
- itsTree.Fill();
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("RefitInward",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
}
+ ResetTrackToFollow(*t);
+ fTrackToFollow.ResetClusters();
+
+ //Refitting...
+ if (RefitAt(3.7, &fTrackToFollow, t)) {
+ fTrackToFollow.SetLabel(t->GetLabel());
+ fTrackToFollow.CookdEdx();
+ CookLabel(&fTrackToFollow,0.); //For comparison only
+
+ if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
+ Double_t a=fTrackToFollow.GetAlpha();
+ Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
+ Double_t xv= GetX()*cs + GetY()*sn;
+ Double_t yv=-GetX()*sn + GetY()*cs;
+
+ Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
+ Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
+ Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
+ Double_t fv=TMath::ATan(tgfv);
+
+ cs=TMath::Cos(fv); sn=TMath::Sin(fv);
+ x = xv*cs + yv*sn;
+ yv=-xv*sn + yv*cs; xv=x;
+
+ if (fTrackToFollow.Propagate(fv+a,xv)) {
+ fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
+ UseClusters(&fTrackToFollow);
+ {
+ AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
+ c.SetSigmaY2(GetSigmaY()*GetSigmaY());
+ c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
+ Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
+ if (chi2<kMaxChi2)
+ if (fTrackToFollow.Update(&c,-chi2,0))
+ fTrackToFollow.SetConstrainedESDtrack(chi2);
+ }
+ ntrk++;
+ }
+ }
+ }
+ delete t;
}
- itsTree.Write();
- savedir->cd();
- cerr<<"Number of TPC tracks: "<<nentr<<endl;
- cerr<<"Number of prolonged tracks: "<<ntrk<<endl;
-
- delete itrack;
+ 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>fLastLayerToTrackTo) {
+ Int_t i=fI-1;
- while (fI) {
- fI--;
+ AliITSlayer &layer=fgLayers[i];
+ AliITStrackV2 &track=fTracks[i];
-#ifdef DEBUG
-cout<<fI<<' ';
-#endif
+ Double_t r=layer.GetR();
- AliITSlayer &layer=fLayers[fI];
- AliITStrackV2 &track=fTracks[fI];
-
- if (fI==3 || fI==1) {
- Double_t rs=0.5*(fLayers[fI+1].GetR() + layer.GetR());
- Double_t ds=0.034; if (fI==3) ds=0.039;
- Double_t dx0r=ds/21.82*2.33, dr=ds*2.33;
- fTrackToFollow.Propagate(fTrackToFollow.GetAlpha(),rs,1*dx0r,dr);
+ if (i==3 || i==1) {
+ 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(layer.GetR(),x,y,z)) {
- cerr<<"AliITStrackerV2::FollowProlongation: failed to estimate track !\n";
- break;
+ if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) {
+ //Warning("FollowProlongation","failed to estimate track !\n");
+ return;
}
Double_t phi=TMath::ATan2(y,x);
- Double_t d=layer.GetThickness(phi,z);
+
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);
- if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR(),1*d/21.82*2.33,d*2.33))
- {
- cerr<<"AliITStrackerV2::FollowProlongation: propagation failed !\n";
- break;
+ phi=det.GetPhi();
+ if (!fTrackToFollow.Propagate(phi,det.GetR())) {
+ //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[fI]);
- if (dz<0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl());
- if (dz > kMaxRoad/4) {
- //cerr<<"AliITStrackerV2::FollowProlongation: too broad road in Z !\n";
- break;
- }
- Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[fI]);
- if (dy<0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp());
- if (dy > kMaxRoad/4) {
- //cerr<<"AliITStrackerV2::FollowProlongation: too broad road in Y !\n";
- break;
+ 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) {
+ //Warning("FollowProlongation","too broad road in Z !\n");
+ return;
}
- Double_t zmin=track.GetZ() - dz;
- Double_t zmax=track.GetZ() + dz;
- Double_t ymin=track.GetY() + layer.GetR()*det.GetPhi() - dy;
- Double_t ymax=track.GetY() + layer.GetR()*det.GetPhi() + dy;
- if (ymax>layer.GetR()*2*TMath::Pi()) {
- ymax-=layer.GetR()*2*TMath::Pi();
- ymin-=layer.GetR()*2*TMath::Pi();
+ if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
+
+ //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]);
+ 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");
+ return;
}
- layer.SelectClusters(zmin,zmax,ymin,ymax);
- //if (1/TMath::Abs(track.Get1Pt())<0.2)
- //cout<<fI<<' '<<1/TMath::Abs(track.Get1Pt())<<' '
- // <<dy<<' '<<dz<<' '<<layer.InRoad()<<endl;
+ Double_t zmin=track.GetZ() - dz;
+ Double_t zmax=track.GetZ() + dz;
+ Double_t ymin=track.GetY() + r*phi - dy;
+ Double_t ymax=track.GetY() + r*phi + dy;
+ layer.SelectClusters(zmin,zmax,ymin,ymax);
+ fI--;
//take another prolongation
- if (!TakeNextProlongation()) if (!tryAgain--) break;
- tryAgain=kLayersToSkip;
+ if (!TakeNextProlongation())
+ if (fLayersNotToSkip[fI]) return;
}
}
}
- if (fI) fI++;
}
-
Int_t AliITStrackerV2::TakeNextProlongation() {
//--------------------------------------------------------------------
- //This function takes another track prolongation
+ // This function takes another track prolongation
+ //
+ // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//--------------------------------------------------------------------
- //Double_t m[20];
- Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
-
- AliITSlayer &layer=fLayers[fI];
- AliITStrackV2 &t=fTracks[fI];
-
- Double_t dz=4*TMath::Sqrt(t.GetSigmaZ2() + kSigmaZ2[fI]);
- Double_t dy=4*TMath::Sqrt(t.GetSigmaY2() + kSigmaY2[fI]);
+ AliITSlayer &layer=fgLayers[fI];
+ ResetTrackToFollow(fTracks[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 (fI==0)
- //if (c->GetLabel(0)!=TMath::Abs(lbl)) continue; //88888888888888888888
Int_t idet=c->GetDetectorIndex();
- if (t.GetDetectorIndex()!=idet) {
+ if (fTrackToFollow.GetDetectorIndex()!=idet) {
const AliITSdetector &det=layer.GetDetector(idet);
- if (!t.Propagate(det.GetPhi(),det.GetR(),0.,0.)) {
- cerr<<"AliITStrackerV2::TakeNextProlongation: propagation failed !\n";
+ ResetTrackToFollow(fTracks[fI]);
+ if (!fTrackToFollow.Propagate(det.GetPhi(),det.GetR())) {
+ //Warning("TakeNextProlongation","propagation failed !\n");
continue;
}
- t.SetDetectorIndex(idet);
-
-#ifdef DEBUG
-cout<<fI<<" change detector !\n";
-#endif
-
+ fTrackToFollow.SetDetectorIndex(idet);
+ if (TMath::Abs(fTrackToFollow.GetZ()-GetZ())>layer.GetR()+dz) continue;
}
- if (TMath::Abs(t.GetZ() - c->GetZ()) > dz) continue;
- if (TMath::Abs(t.GetY() - c->GetY()) > dy) continue;
-
- //m[0]=fYV; m[1]=fZV;
- //chi2=t.GetPredictedChi2(c,m,d/21.82*2.33);
- chi2=t.GetPredictedChi2(c);
+ if (TMath::Abs(fTrackToFollow.GetZ() - c->GetZ()) > dz) continue;
+ if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue;
- if (chi2<kMaxChi2) break;
+ chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break;
}
-#ifdef DEBUG
-cout<<fI<<" chi2="<<chi2<<' '<<t.GetY()<<' '<<t.GetZ()<<' '<<dy<<' '<<dz<<endl;
-#endif
-
if (chi2>=kMaxChi2) return 0;
if (!c) return 0;
- ResetTrackToFollow(t);
-
- //if (!fTrackToFollow.Update(m,chi2,(fI<<28)+ci)) {
if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) {
- cerr<<"AliITStrackerV2::TakeNextProlongation: filtering failed !\n";
+ //Warning("TakeNextProlongation","filtering failed !\n");
return 0;
}
- fTrackToFollow.Improve(d/21.82*2.33,fYV,fZV);
-#ifdef DEBUG
-cout<<"accepted lab="<<c->GetLabel(0)<<' '
- <<fTrackToFollow.GetNumberOfClusters()<<' '
- <<fTrackToFollow.GetY()<<' '<<fTrackToFollow.GetZ()<<endl<<endl;
-#endif
+ if (fTrackToFollow.GetNumberOfClusters()>1)
+ if (TMath::Abs(fTrackToFollow.GetD())>4) return 0;
- return 1;
-}
+ fTrackToFollow.
+ SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b.
+ {
+ 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 !!!!
+ Double_t xyz[]={GetX(),GetY(),GetZ()};
+ Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
+ fTrackToFollow.Improve(d,xyz,ers);
+ }
+
+ return 1;
+}
AliITStrackerV2::AliITSlayer::AliITSlayer() {
fN=0;
fI=0;
+
+ fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
}
AliITStrackerV2::AliITSlayer::~AliITSlayer() {
for (Int_t i=0; i<fN; i++) delete fClusters[i];
}
+void AliITStrackerV2::AliITSlayer::ResetClusters() {
+ //--------------------------------------------------------------------
+ // This function removes loaded clusters
+ //--------------------------------------------------------------------
+ for (Int_t i=0; i<fN; i++) delete fClusters[i];
+ fN=0;
+ fI=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;}
// This function sets the "window"
//--------------------------------------------------------------------
fI=FindClusterIndex(zmin); fZmax=zmax;
+ Double_t circle=2*TMath::Pi()*fR;
+ if (ymax>circle) { ymax-=circle; ymin-=circle; }
fYmin=ymin; fYmax=ymax;
}
fI=i+1;
break;
}
+
return cluster;
}
//--------------------------------------------------------------------
//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 phi, Double_t z) const {
+AliITStrackerV2::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
+const {
//--------------------------------------------------------------------
- //This function returns the thickness of this layer
+ //This function returns the layer thickness at this point (units X0)
//--------------------------------------------------------------------
- //-pi<phi<+pi
- if (3 <fR&&fR<8 ) return 1.1*0.096;
- if (13<fR&&fR<26) return 1.1*0.088;
- if (37<fR&&fR<41) return 1.1*0.085;
- return 1.1*0.081;
-}
+ Double_t d=0.0085;
+ x0=21.82;
+
+ if (43<fR&&fR<45) { //SSD2
+ 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-3.9*(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
+ 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-3.9*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
+ 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
+ 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
+ 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;}
+ }
-Double_t AliITStrackerV2::GetEffectiveThickness(Double_t phi,Double_t z) const
+ return d;
+}
+
+Double_t AliITStrackerV2::GetEffectiveThickness(Double_t y,Double_t z) const
{
//--------------------------------------------------------------------
- //Returns the thickness between the current layer and the vertex
+ //Returns the thickness between the current layer and the vertex (units X0)
//--------------------------------------------------------------------
- //-pi<phi<+pi
- Double_t d=0.1;
+ 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(phi,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+=0.034*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+=0.039*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"
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 ncl;
}
+Bool_t
+AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,const AliITStrackV2 *c) {
+ //--------------------------------------------------------------------
+ // 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 (xx > t->GetX()) {
+ from=0; to=kMaxLayer;
+ step=+1;
+ } else {
+ from=kMaxLayer-1; to=-1;
+ step=-1;
+ }
+
+ for (Int_t i=from; i != to; i += step) {
+ AliITSlayer &layer=fgLayers[i];
+ Double_t r=layer.GetR();
+
+ {
+ Double_t hI=i-0.5*step;
+ if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
+ Double_t rs=0.5*(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;
+ }
+ Double_t phi=TMath::ATan2(y,x);
+ Int_t idet=layer.FindDetectorIndex(phi,z);
+ if (idet<0) {
+ return kFALSE;
+ }
+ const AliITSdetector &det=layer.GetDetector(idet);
+ phi=det.GetPhi();
+ if (!t->Propagate(phi,det.GetR())) {
+ return kFALSE;
+ }
+ t->SetDetectorIndex(idet);
+
+ const AliITSclusterV2 *cl=0;
+ Double_t maxchi2=kMaxChi2;
+
+ Int_t idx=index[i];
+ if (idx>0) {
+ const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
+ if (idet != c->GetDetectorIndex()) {
+ idet=c->GetDetectorIndex();
+ const AliITSdetector &det=layer.GetDetector(idet);
+ if (!t->Propagate(det.GetPhi(),det.GetR())) {
+ return kFALSE;
+ }
+ t->SetDetectorIndex(idet);
+ }
+ Double_t chi2=t->GetPredictedChi2(c);
+ if (chi2<maxchi2) {
+ cl=c;
+ maxchi2=chi2;
+ } else {
+ return kFALSE;
+ }
+ }
+ /*
+ if (cl==0)
+ if (t->GetNumberOfClusters()>2) {
+ Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
+ Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
+ Double_t zmin=t->GetZ() - dz;
+ Double_t zmax=t->GetZ() + dz;
+ Double_t ymin=t->GetY() + phi*r - dy;
+ Double_t ymax=t->GetY() + phi*r + dy;
+ layer.SelectClusters(zmin,zmax,ymin,ymax);
+
+ const AliITSclusterV2 *c=0; Int_t ci=-1;
+ while ((c=layer.GetNextCluster(ci))!=0) {
+ if (idet != c->GetDetectorIndex()) continue;
+ Double_t chi2=t->GetPredictedChi2(c);
+ if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
+ }
+ }
+ */
+ if (cl) {
+ if (!t->Update(cl,maxchi2,idx)) {
+ return kFALSE;
+ }
+ t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
+ }
+
+ {
+ 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(xx,0.,0.)) return kFALSE;
+ return kTRUE;
+}
+
+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();
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff