//-------------------------------------------------------------------------
// Implementation of the ITS tracker class
-//
+// It reads AliITSRecPoint 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 <stdlib.h>
+#include <new>
+
+#include <TError.h>
#include <TFile.h>
#include <TTree.h>
#include <TRandom.h>
-#include <Riostream.h>
+#include <TGeoMatrix.h>
-#include "AliITSgeom.h"
+#include "AliITSgeomTGeo.h"
+#include "AliAlignObj.h"
+#include "AliITSRecPoint.h"
+#include "AliESD.h"
#include "AliITSRecPoint.h"
-#include "AliTPCtrack.h"
-#include "AliITSclusterV2.h"
#include "AliITStrackerV2.h"
-//#define DEBUG
+ClassImp(AliITStrackerV2)
+
+AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; //ITS layers
+
+AliITStrackerV2::AliITStrackerV2():
+ AliTracker(),
+ fI(kMaxLayer),
+ fBestTrack(),
+ fTrackToFollow(),
+ fPass(0),
+ fLastLayerToTrackTo(kLastLayerToTrackTo)
+{
+ //--------------------------------------------------------------------
+ //This is the AliITStrackerV2 default constructor
+ //--------------------------------------------------------------------
+
+ for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer();
+
+ 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];
-#ifdef DEBUG
-Int_t LAB=38;
-#endif
+}
+
+AliITStrackerV2::AliITStrackerV2(const AliITStrackerV2 &t):
+ AliTracker(t),
+ fI(t.fI),
+ fBestTrack(t.fBestTrack),
+ fTrackToFollow(t.fTrackToFollow),
+ fPass(t.fPass),
+ fLastLayerToTrackTo(t.fLastLayerToTrackTo)
+{
+ //--------------------------------------------------------------------
+ //This is the AliITStrackerV2 copy constructor
+ //--------------------------------------------------------------------
+
+ //for (Int_t i=1; i<kMaxLayer+1; i++) new(fgLayers+i-1) AliITSlayer();
-AliITStrackerV2::AliITSlayer AliITStrackerV2::fLayers[kMaxLayer]; // ITS layers
+ fConstraint[0]=t.fConstraint[0]; fConstraint[1]=t.fConstraint[1];
-AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() {
+ Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
+ xyz[0]=t.GetX(); xyz[1]=t.GetY(); xyz[2]=t.GetZ();
+ ers[0]=t.GetSigmaX(); ers[1]=t.GetSigmaY(); ers[2]=t.GetSigmaZ();
+ SetVertex(xyz,ers);
+
+ for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=t.fLayersNotToSkip[i];
+
+}
+
+AliITStrackerV2::AliITStrackerV2(const Char_t *geom) :
+ AliTracker(),
+ fI(kMaxLayer),
+ fBestTrack(),
+ fTrackToFollow(),
+ fPass(0),
+ fLastLayerToTrackTo(kLastLayerToTrackTo)
+{
//--------------------------------------------------------------------
//This is the AliITStrackerV2 constructor
//--------------------------------------------------------------------
- AliITSgeom *g=(AliITSgeom*)geom;
+ if (geom) {
+ AliWarning("\"geom\" is actually a dummy argument !");
+ }
- Float_t x,y,z;
- Int_t i;
- for (i=1; i<kMaxLayer+1; i++) {
- Int_t nlad=g->GetNladders(i);
- Int_t ndet=g->GetNdetectors(i);
+ for (Int_t i=1; i<kMaxLayer+1; i++) {
+ Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
+ Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
- g->GetTrans(i,1,1,x,y,z);
- Double_t r=TMath::Sqrt(x*x + y*y);
+ Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
+ AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
Double_t poff=TMath::ATan2(y,x);
Double_t zoff=z;
+ Double_t r=TMath::Sqrt(x*x + y*y);
- g->GetTrans(i,1,2,x,y,z);
+ AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
r += TMath::Sqrt(x*x + y*y);
- g->GetTrans(i,2,1,x,y,z);
+ AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
r += TMath::Sqrt(x*x + y*y);
- g->GetTrans(i,2,2,x,y,z);
+ AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
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(); if (phi<0) phi += 2*TMath::Pi();
- AliITSdetector &det=fLayers[i-1].GetDetector((j-1)*ndet + k-1);
-
+ TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
+ const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
+ m.Multiply(tm);
+ Double_t txyz[3]={0.}, xyz[3]={0.};
+ m.LocalToMaster(txyz,xyz);
+ Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
+ Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
+
+ if (phi<0) phi+=TMath::TwoPi();
+ else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
+
+ AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
new(&det) AliITSdetector(r,phi);
}
}
}
- 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];
+
+}
+
+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];
}
-void AliITStrackerV2::LoadClusters() {
+Int_t AliITStrackerV2::LoadClusters(TTree *cTree) {
//--------------------------------------------------------------------
//This function loads ITS clusters
//--------------------------------------------------------------------
- char cname[100];
- sprintf(cname,"TreeC_ITS_%d",GetEventNumber());
- TTree *cTree=(TTree*)gDirectory->Get(cname);
- if (!cTree) {
- cerr<<"AliITStrackerV2::LoadClusters can't get cTree !\n";
- exit(1);
- }
- TBranch *branch=cTree->GetBranch("Clusters");
+ TBranch *branch=cTree->GetBranch("ITSRecPoints");
if (!branch) {
- cerr<<"AliITStrackerV2::LoadClusters can't get Clusters branch !\n";
- exit(1);
+ Error("LoadClusters"," can't get the branch !\n");
+ return 1;
}
- TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
+ TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
branch->SetAddress(&clusters);
Int_t j=0;
for (Int_t i=0; i<kMaxLayer; i++) {
- Int_t ndet=fLayers[i].GetNdetectors();
- Int_t jmax = j + fLayers[i].GetNladders()*ndet;
+ Int_t ndet=fgLayers[i].GetNdetectors();
+ Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
+
+ Double_t r=fgLayers[i].GetR();
+ Double_t circ=TMath::TwoPi()*r;
+
for (; j<jmax; j++) {
if (!cTree->GetEvent(j)) continue;
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;
-Int_t idx=c->GetDetectorIndex();
-Int_t lay=i, lad=idx/ndet, det=idx-lad*ndet;
-cout<<lay<<' '<<lad<<' '<<det<<' '<<c->GetY()<<' '<<c->GetZ()<<endl;
-#endif
-
- fLayers[i].InsertCluster(new AliITSclusterV2(*c));
+ AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
+
+ if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
+
+ Int_t idx=c->GetDetectorIndex();
+ AliITSdetector &det=fgLayers[i].GetDetector(idx);
+
+ Double_t y=r*det.GetPhi()+c->GetY();
+ if (y>circ) y-=circ; else if (y<0) y+=circ;
+ c->SetPhiR(y);
+
+ fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
}
clusters->Delete();
}
- fLayers[i].ResetRoad(); //road defined by the cluster density
+ fgLayers[i].ResetRoad(); //road defined by the cluster density
}
- delete cTree; //Thanks to Mariana Bondila
+
+ return 0;
}
void AliITStrackerV2::UnloadClusters() {
//--------------------------------------------------------------------
//This function unloads ITS clusters
//--------------------------------------------------------------------
- for (Int_t i=0; i<kMaxLayer; i++) fLayers[i].ResetClusters();
+ for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
}
-//#ifdef DEBUG
-static Int_t lbl;
-//#endif
-
-Int_t AliITStrackerV2::Clusters2Tracks(const TFile *inp, TFile *out) {
+static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) {
//--------------------------------------------------------------------
- //This functions reconstructs ITS tracks
+ // Correction for the material between the TPC and the ITS
+ // (should it belong to the TPC code ?)
//--------------------------------------------------------------------
- TFile *in=(TFile*)inp;
- TDirectory *savedir=gDirectory;
-
- LoadClusters();
-
- if (!in->IsOpen()) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): ";
- cerr<<"file with TPC tracks is not open !\n";
- return 1;
+ 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(GetX(),GetY()))>4) {
+ delete t;
+ continue;
+ }
- in->cd();
-
- Char_t tname[100];
- Int_t nentr=0; TObjArray itsTracks(15000);
-
- {/* Read TPC tracks */
- sprintf(tname,"TreeT_TPC_%d",GetEventNumber());
- TTree *tpcTree=(TTree*)in->Get(tname);
- if (!tpcTree) {
- cerr<<"AliITStrackerV2::Clusters2Tracks(): "
- "can't get a tree with TPC tracks !\n";
- return 3;
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("Clusters2Tracks",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
+ }
+ itsTracks.AddLast(t);
}
- AliTPCtrack *itrack=new AliTPCtrack;
- tpcTree->SetBranchAddress("tracks",&itrack);
- nentr=(Int_t)tpcTree->GetEntries();
- 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;
- delete t;
- continue;
- }
- if (TMath::Abs(t->GetD())>4) continue;
-
- t->PropagateTo(80.,0.0053,30);
- if (TMath::Abs(t->GetY())>12.8) t->CorrectForMaterial(0.03);
- if (TMath::Abs(t->GetZ())<0.2) t->CorrectForMaterial(0.40);
- t->PropagateTo(61.,0.0053,30);
- //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);
+ } /* End Read ESD tracks */
- itsTracks.AddLast(t);
- }
- delete tpcTree; //Thanks to Mariana Bondila
- delete itrack;
- }
itsTracks.Sort();
+ Int_t nentr=itsTracks.GetEntriesFast();
- out->cd();
-
- sprintf(tname,"TreeT_ITS_%d",GetEventNumber());
- TTree itsTree(tname,"Tree with ITS tracks");
- AliITStrackV2 *otrack=&fBestTrack;
- itsTree.Branch("tracks","AliITStrackV2",&otrack,32000,0);
-
+ Int_t ntrk=0;
for (fPass=0; fPass<2; fPass++) {
Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
for (Int_t i=0; i<nentr; i++) {
- if (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
+ fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
+ UseClusters(&fBestTrack);
+ delete itsTracks.RemoveAt(i);
+ ntrk++;
}
}
- itsTree.Write();
-
itsTracks.Delete();
- UnloadClusters();
-
- savedir->cd();
- cerr<<"Number of TPC tracks: "<<nentr<<endl;
- cerr<<"Number of prolonged tracks: "<<itsTree.GetEntries()<<endl;
+ Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
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;
-
- LoadClusters();
+ 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();
+ // 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(event->GetVertex())) {
+ fTrackToFollow.StartTimeIntegral();
+ }
+ fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
+ }
- Char_t tname[100];
- sprintf(tname,"TreeT_ITS_%d",GetEventNumber());
- TTree *itsTree=(TTree*)in->Get(tname);
- if (!itsTree) {
- cerr<<"AliITStrackerV2::PropagateBack() ";
- cerr<<"can't get a tree with ITS tracks !\n";
- return 3;
+ fTrackToFollow.ResetCovariance(10.); 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();
+ Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
- sprintf(tname,"TreeT_ITSb_%d",GetEventNumber());
- TTree backTree(tname,"Tree with back propagated ITS tracks");
- AliTPCtrack *otrack=0;
- backTree.Branch("tracks","AliTPCtrack",&otrack,32000,2);
+ return 0;
+}
- Int_t ntrk=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 nentr=(Int_t)itsTree->GetEntries();
+ Int_t ntrk=0;
for (Int_t i=0; i<nentr; i++) {
- itsTree->GetEvent(i);
- ResetTrackToFollow(*itrack);
-
- // propagete to vertex [SR, GSI 17.02.2003]
- fTrackToFollow.PropagateTo(3.,0.0028,65.19);
- fTrackToFollow.PropagateToVertex();
-
- // Start Time measurement [SR, GSI 17.02.2003]
- fTrackToFollow.StartTimeIntegral();
- fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
- //
+ AliESDtrack *esd=event->GetTrack(i);
- fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
-
- Int_t itsLabel=fTrackToFollow.GetLabel(); //save the ITS track label
-
-#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 d=0.0034, x0=38.6;
- if (fI==2) {rs=9.; d=0.0097; x0=42.;}
- if (!fTrackToFollow.PropagateTo(rs,-d,x0)) throw "";
- }
-
- // remember old position [SR, GSI 18.02.2003]
- Double_t oldX, oldY, oldZ;
- fTrackToFollow.GetGlobalXYZat(fTrackToFollow.GetX(),oldX,oldY,oldZ);
- //
-
- 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);
- }
- }
-
- 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 (cl) {
- if (!fTrackToFollow.Update(cl,maxchi2,index))
- cerr<<"AliITStrackerV2::PropagateBack: filtering failed !\n";
- }
- {
- Double_t x0;
- x=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0);
- fTrackToFollow.CorrectForMaterial(-x,x0);
- }
-
- // track time update [SR, GSI 17.02.2003]
- Double_t newX, newY, newZ;
- fTrackToFollow.GetGlobalXYZat(fTrackToFollow.GetX(),newX,newY,newZ);
- Double_t dL2 = (oldX-newX)*(oldX-newX)+(oldY-newY)*(oldY-newY)+(oldZ-newZ)*(oldZ-newZ);
- fTrackToFollow.AddTimeStep(TMath::Sqrt(dL2));
- //
-
- }
+ t=new AliITStrackV2(*esd);
+ } catch (const Char_t *msg) {
+ Warning("RefitInward",msg);
+ delete t;
+ continue;
+ }
- fTrackToFollow.PropagateTo(50.,-0.001);
- //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,-0.0053,30);
- fTrackToFollow.PropagateTo(80.,-0.0053,30);
-
- fTrackToFollow.SetLabel(itsLabel);
- otrack=new AliTPCtrack(fTrackToFollow,fTrackToFollow.GetAlpha());
- backTree.Fill(); delete otrack;
- UseClusters(&fTrackToFollow);
- cerr << ++ntrk << " \r";
+ if (CorrectForDeadZoneMaterial(t)!=0) {
+ Warning("RefitInward",
+ "failed to correct for the material in the dead zone !\n");
+ delete t;
+ continue;
}
- catch (const Char_t *msg) {
- cerr<<msg<<endl;
+
+ ResetTrackToFollow(*t);
+ fTrackToFollow.ResetClusters();
+
+ //Refitting...
+ if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) {
+ fTrackToFollow.SetLabel(t->GetLabel());
+ fTrackToFollow.CookdEdx();
+ CookLabel(&fTrackToFollow,0.); //For comparison only
+
+ if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
+ AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
+ esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
+ Float_t r[3]={0.,0.,0.};
+ Double_t maxD=3.;
+ esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
+ ntrk++;
+ }
}
+ delete t;
}
- backTree.Write();
-
- cerr<<"Number of ITS tracks: "<<nentr<<endl;
- cerr<<"Number of back propagated ITS tracks: "<<ntrk<<endl;
-
- delete itrack;
-
- delete itsTree; //Thanks to Mariana Bondila
-
- UnloadClusters();
-
- savedir->cd();
+ Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
return 0;
}
//--------------------------------------------------------------------
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 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)) {
- //cerr<<"AliITStrackerV2::FollowProlongation: "
- //"propagation failed !\n";
- break;
+ //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;
+ Double_t phi,z;
+ if (!fTrackToFollow.GetPhiZat(r,phi,z)) {
+ //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=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=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]);
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;
}
+ fI--;
+
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--;
+ if (layer.SelectClusters(zmin,zmax,ymin,ymax)==0)
+ if (fLayersNotToSkip[fI]) return;
- //take another prolongation
- if (!TakeNextProlongation()) if (!tryAgain--) break;
- tryAgain=kLayersToSkip;
+ if (!TakeNextProlongation())
+ if (fLayersNotToSkip[fI]) return;
}
//
// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//--------------------------------------------------------------------
- AliITSlayer &layer=fLayers[fI];
+ AliITSlayer &layer=fgLayers[fI];
ResetTrackToFollow(fTracks[fI]);
Double_t dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + kSigmaZ2[fI]);
Double_t 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.;
+ 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 AliITSRecPoint *c=0; Int_t ci=-1;
+ const AliITSRecPoint *cc=0; Int_t cci=-1;
+ Double_t chi2=kMaxChi2;
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;
if (TMath::Abs(fTrackToFollow.GetY() - c->GetY()) > dy) continue;
- chi2=fTrackToFollow.GetPredictedChi2(c); if (chi2<kMaxChi2) break;
+ Double_t ch2=fTrackToFollow.GetPredictedChi2(c);
+ if (ch2 > chi2) continue;
+ chi2=ch2;
+ cc=c; cci=ci;
+ break;
}
-#ifdef DEBUG
-cout<<fI<<" chi2="<<chi2<<' '
- <<fTrackToFollow.GetY()<<' '<<fTrackToFollow.GetZ()<<' '
- <<dy<<' '<<dz<<endl;
-{
-Double_t phi=TMath::ATan(fTrackToFollow.GetY()/fTrackToFollow.GetX())
- +fTrackToFollow.GetAlpha(); phi=phi*180./3.141593;
-cout<<phi<<endl;
-}
-#endif
-
- if (chi2>=kMaxChi2) return 0;
- if (!c) return 0;
+ if (!cc) return 0;
- if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) {
- //cerr<<"AliITStrackerV2::TakeNextProlongation: filtering failed !\n";
+ {// Take into account the mis-alignment
+ Double_t x = fTrackToFollow.GetX() + cc->GetX();
+ if (!fTrackToFollow.PropagateTo(x,0.,0.)) return 0;
+ }
+ if (!fTrackToFollow.Update(cc,chi2,(fI<<28)+cci)) {
+ //Warning("TakeNextProlongation","filtering failed !\n");
return 0;
}
if (fTrackToFollow.GetNumberOfClusters()>1)
- if (TMath::Abs(fTrackToFollow.GetD())>4) return 0;
+ if (TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()))>4) return 0;
fTrackToFollow.
- SetSampledEdx(c->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b.
+ SetSampledEdx(cc->GetQ(),fTrackToFollow.GetNumberOfClusters()-1); //b.b.
{
- Double_t x0;
+ Double_t x0;
Double_t d=layer.GetThickness(fTrackToFollow.GetY(),fTrackToFollow.GetZ(),x0);
- fTrackToFollow.CorrectForMaterial(d,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()};
+ 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;
}
-AliITStrackerV2::AliITSlayer::AliITSlayer() {
+AliITStrackerV2::AliITSlayer::AliITSlayer():
+ fR(0.),
+ fPhiOffset(0.),
+ fNladders(0),
+ fZOffset(0.),
+ fNdetectors(0),
+ fDetectors(0),
+ fNsel(0),
+ fRoad(2*fR*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster
+{
//--------------------------------------------------------------------
//default AliITSlayer constructor
//--------------------------------------------------------------------
- fN=0;
- fDetectors=0;
+
+ for (Int_t i=0; i<kNsector; i++) fN[i]=0;
+
}
AliITStrackerV2::AliITSlayer::
-AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) {
+AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
+ fR(r),
+ fPhiOffset(p),
+ fNladders(nl),
+ fZOffset(z),
+ fNdetectors(nd),
+ fDetectors(new AliITSdetector[nl*nd]),
+ fNsel(0),
+ fRoad(2*r*TMath::Sqrt(3.14/1.)) //assuming that there's only one cluster
+{
//--------------------------------------------------------------------
//main AliITSlayer constructor
//--------------------------------------------------------------------
- fR=r; fPhiOffset=p; fZOffset=z;
- fNladders=nl; fNdetectors=nd;
- fDetectors=new AliITSdetector[fNladders*fNdetectors];
- fN=0;
- fI=0;
+ for (Int_t i=0; i<kNsector; i++) fN[i]=0;
+
+ for (Int_t i=0; i<kMaxClusterPerLayer; i++) fClusters[i]=0;
- fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
}
AliITStrackerV2::AliITSlayer::~AliITSlayer() {
// AliITSlayer destructor
//--------------------------------------------------------------------
delete[] fDetectors;
- for (Int_t i=0; i<fN; i++) delete fClusters[i];
+ ResetClusters();
}
void AliITStrackerV2::AliITSlayer::ResetClusters() {
//--------------------------------------------------------------------
// This function removes loaded clusters
//--------------------------------------------------------------------
- for (Int_t i=0; i<fN; i++) delete fClusters[i];
- fN=0;
- fI=0;
+ for (Int_t s=0; s<kNsector; s++) {
+ Int_t &n=fN[s];
+ while (n) {
+ n--;
+ delete fClusters[s*kMaxClusterPerSector+n];
+ }
+ }
}
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++;
+ for (Int_t s=0; s<kNsector; s++) {
+ Int_t i=fN[s];
+ while (i--)
+ if (TMath::Abs(fClusters[s*kMaxClusterPerSector+i]->GetZ())<fR) n++;
}
if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
}
-Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
+Int_t AliITStrackerV2::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
//--------------------------------------------------------------------
- //This function adds a cluster to this layer
+ // This function inserts a cluster to this layer in increasing
+ // order of the cluster's fZ
//--------------------------------------------------------------------
- if (fN==kMaxClusterPerLayer) {
- cerr<<"AliITStrackerV2::AliITSlayer::InsertCluster(): "
- "Too many clusters !\n";
+ Float_t circ=TMath::TwoPi()*fR;
+ Int_t sec=Int_t(kNsector*c->GetPhiR()/circ);
+ if (sec>=kNsector) {
+ ::Error("InsertCluster","Wrong sector !\n");
return 1;
}
-
- if (fN==0) {fClusters[fN++]=c; return 0;}
- Int_t i=FindClusterIndex(c->GetZ());
- memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*));
- fClusters[i]=c; fN++;
-
+ Int_t &n=fN[sec];
+ if (n>=kMaxClusterPerSector) {
+ ::Error("InsertCluster","Too many clusters !\n");
+ return 1;
+ }
+ if (n==0) fClusters[sec*kMaxClusterPerSector]=c;
+ else {
+ Int_t i=FindClusterIndex(c->GetZ(),sec);
+ Int_t k=n-i+sec*kMaxClusterPerSector;
+ memmove(fClusters+i+1 ,fClusters+i,k*sizeof(AliITSRecPoint*));
+ fClusters[i]=c;
+ }
+ n++;
return 0;
}
-Int_t AliITStrackerV2::AliITSlayer::FindClusterIndex(Double_t z) const {
+Int_t
+AliITStrackerV2::AliITSlayer::FindClusterIndex(Float_t z,Int_t s) const {
//--------------------------------------------------------------------
- // This function returns the index of the nearest cluster
+ // For the sector "s", this function returns the index of the first
+ // with its fZ >= "z".
//--------------------------------------------------------------------
- if (fN==0) return 0;
- if (z <= fClusters[0]->GetZ()) return 0;
- if (z > fClusters[fN-1]->GetZ()) return fN;
- Int_t b=0, e=fN-1, m=(b+e)/2;
+ Int_t nc=fN[s];
+ if (nc==0) return kMaxClusterPerSector*s;
+
+ Int_t b=kMaxClusterPerSector*s;
+ if (z <= fClusters[b]->GetZ()) return b;
+
+ Int_t e=b+nc-1;
+ if (z > fClusters[e]->GetZ()) return e+1;
+
+ Int_t m=(b+e)/2;
for (; b<e; m=(b+e)/2) {
if (z > fClusters[m]->GetZ()) b=m+1;
else e=m;
return m;
}
-void AliITStrackerV2::AliITSlayer::
-SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
+Int_t AliITStrackerV2::AliITSlayer::
+SelectClusters(Float_t zmin,Float_t zmax,Float_t ymin, Float_t ymax) {
//--------------------------------------------------------------------
- // This function sets the "window"
+ // This function selects clusters within 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;
+ Float_t circ=fR*TMath::TwoPi();
+
+ if (ymin>circ) ymin-=circ; else if (ymin<0) ymin+=circ;
+ if (ymax>circ) ymax-=circ; else if (ymax<0) ymax+=circ;
+
+ Int_t i1=Int_t(kNsector*ymin/circ); if (i1==kNsector) i1--;
+ if (fN[i1]!=0) {
+ Float_t ym = (ymax<ymin) ? ymax+circ : ymax;
+ Int_t i=FindClusterIndex(zmin,i1), imax=i1*kMaxClusterPerSector+fN[i1];
+ for (; i<imax; i++) {
+ AliITSRecPoint *c=fClusters[i];
+ if (c->IsUsed()) continue;
+ if (c->GetZ()>zmax) break;
+ if (c->GetPhiR()<=ymin) continue;
+ if (c->GetPhiR()>ym) continue;
+ fIndex[fNsel++]=i;
+ }
+ }
+
+ Int_t i2=Int_t(kNsector*ymax/circ); if (i2==kNsector) i2--;
+ if (i2==i1) return fNsel;
+
+ if (fN[i2]!=0) {
+ Float_t ym = (ymin>ymax) ? ymin-circ : ymin;
+ Int_t i=FindClusterIndex(zmin,i2), imax=i2*kMaxClusterPerSector+fN[i2];
+ for (; i<imax; i++) {
+ AliITSRecPoint *c=fClusters[i];
+ if (c->IsUsed()) continue;
+ if (c->GetZ()>zmax) break;
+ if (c->GetPhiR()<=ym) continue;
+ if (c->GetPhiR()>ymax) continue;
+ fIndex[fNsel++]=i;
+ }
+ }
+
+ return fNsel;
}
-const AliITSclusterV2 *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){
+const AliITSRecPoint *AliITStrackerV2::AliITSlayer::GetNextCluster(Int_t &ci){
//--------------------------------------------------------------------
// This function returns clusters within the "window"
//--------------------------------------------------------------------
- const AliITSclusterV2 *cluster=0;
- for (Int_t i=fI; i<fN; i++) {
- const AliITSclusterV2 *c=fClusters[i];
- if (c->GetZ() > fZmax) break;
- if (c->IsUsed()) continue;
- const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
- Double_t y=fR*det.GetPhi() + c->GetY();
-
- if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
- if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
-
- if (y<fYmin) continue;
- if (y>fYmax) continue;
- cluster=c; ci=i;
- fI=i+1;
- break;
+ AliITSRecPoint *c=0;
+ ci=-1;
+ if (fNsel) {
+ fNsel--;
+ ci=fIndex[fNsel];
+ c=fClusters[ci];
}
+ return c;
+}
- return cluster;
+Int_t AliITStrackerV2::AliITSlayer::GetNumberOfClusters() const {
+ Int_t n=0;
+ for (Int_t s=0; s<kNsector; s++) n+=fN[s];
+ return n;
}
-Int_t AliITStrackerV2::AliITSlayer::
-FindDetectorIndex(Double_t phi, Double_t z) const {
+Int_t
+AliITStrackerV2::AliITSlayer::FindDetectorIndex(Double_t phi,Double_t z)const {
//--------------------------------------------------------------------
//This function finds the detector crossed by the track
//--------------------------------------------------------------------
- Double_t dphi=phi-fPhiOffset;
+ Double_t dphi;
+ if (fZOffset<0) // old geometry
+ dphi = -(phi-fPhiOffset);
+ else // new geometry
+ 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);
if (nz>=fNdetectors) return -1;
if (nz<0) return -1;
-#ifdef DEBUG
-cout<<np<<' '<<nz<<endl;
-#endif
-
return np*fNdetectors + nz;
}
if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
}
-#ifdef DEBUG
- cout<<"d="<<d<<endl;
-#endif
-
return d;
}
Double_t d=0.0028*3*3; //beam pipe
Double_t x0=0;
- Double_t xn=fLayers[fI].GetR();
+ Double_t xn=fgLayers[fI].GetR();
for (Int_t i=0; i<fI; i++) {
- Double_t xi=fLayers[i].GetR();
- d+=fLayers[i].GetThickness(y,z,x0)*xi*xi;
+ Double_t xi=fgLayers[i].GetR();
+ d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
}
if (fI>1) {
}
if (fI>3) {
- Double_t xi=0.5*(fLayers[3].GetR()+fLayers[4].GetR());
+ Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
d+=0.0034*xi*xi;
}
return d/(xn*xn);
}
-Int_t AliITStrackerV2::AliITSlayer::InRoad() const {
+Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,
+ const AliITStrackV2 *c, Bool_t extra) {
//--------------------------------------------------------------------
- // This function returns number of clusters within the "window"
+ // This function refits the track "t" at the position "x" using
+ // the clusters from "c"
+ // If "extra"==kTRUE,
+ // the clusters from overlapped modules get attached to "t"
//--------------------------------------------------------------------
- Int_t ncl=0;
- for (Int_t i=fI; i<fN; i++) {
- const AliITSclusterV2 *c=fClusters[i];
- if (c->GetZ() > fZmax) break;
- if (c->IsUsed()) continue;
- const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
- Double_t y=fR*det.GetPhi() + c->GetY();
-
- if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
- if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
-
- if (y<fYmin) continue;
- if (y>fYmax) continue;
- ncl++;
+ 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;
}
- return ncl;
-}
-Bool_t AliITStrackerV2::RefitAt(Double_t x, AliITStrackV2 *t, Int_t *index) {
- //--------------------------------------------------------------------
- // This function refits a track at a given position
- //--------------------------------------------------------------------
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);
+ 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 (hI==1.5) {rs=9.; d=0.0097; x0=42;}
- if (!t->PropagateTo(rs,d,x0)) {
+ if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
+ if (!t->PropagateTo(rs,-step*d,x0)) {
return kFALSE;
}
}
}
- Double_t x,y,z;
- if (!t->GetGlobalXYZat(r,x,y,z)) {
+ // 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 phi,z;
+ if (!t->GetPhiZat(r,phi,z)) {
return kFALSE;
}
- Double_t phi=TMath::ATan2(y,x);
+
Int_t idet=layer.FindDetectorIndex(phi,z);
if (idet<0) {
return kFALSE;
}
t->SetDetectorIndex(idet);
- const AliITSclusterV2 *cl=0;
+ const AliITSRecPoint *cl=0;
Double_t maxchi2=kMaxChi2;
Int_t idx=index[i];
- if (idx>0) {
- const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
+ if (idx>=0) {
+ const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
if (idet != c->GetDetectorIndex()) {
idet=c->GetDetectorIndex();
const AliITSdetector &det=layer.GetDetector(idet);
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) {
+ // Take into account the mis-alignment
+ Double_t x=t->GetX()+cl->GetX();
+ if (!t->PropagateTo(x,0.,0.)) return kFALSE;
+ if (!t->Update(cl,maxchi2,idx)) {
+ return kFALSE;
+ }
+ t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
}
- /*
- if (cl==0)
- if (t->GetNumberOfClusters()>2) {
- Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
+ {
+ Double_t x0;
+ Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
+ t->CorrectForMaterial(-step*d,x0);
+ }
+
+ if (extra) { //search for extra clusters
+ AliITStrackV2 tmp(*t);
+ Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]);
+ if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
+ if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
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;
+ const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
+ Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1;
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 (idet == c->GetDetectorIndex()) continue;
- if (cl) {
- if (!t->Update(cl,maxchi2,idx)) {
- return kFALSE;
- }
+ const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
+
+ if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
+
+ if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
+ if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
+
+ Double_t chi2=tmp.GetPredictedChi2(c);
+ if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
+ }
+ if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
}
- {
- 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;
}
// 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();
- */
+
+ Int_t clusterIndex = t->GetClusterIndex(0);
+ AliITSRecPoint *c= 0x0;
+
+ if (clusterIndex>-1)
+ c = (AliITSRecPoint *)GetCluster(clusterIndex);
+ if (c && c->GetSigmaZ2()>0.1) c->UnUse();
+
+ c = 0x0;
+ clusterIndex = t->GetClusterIndex(1);
+ if (clusterIndex>-1)
+ c=(AliITSRecPoint *)GetCluster(clusterIndex);
+ if (c && c->GetSigmaZ2()>0.1) c->UnUse();
+
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff