* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
+/* $Id$ */
//-------------------------------------------------------------------------
// Implementation of the ITS tracker class
-// It reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks
+// 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 <new>
+#include <TError.h>
#include <TFile.h>
#include <TTree.h>
#include <TRandom.h>
+#include <TGeoMatrix.h>
-#include "AliITSgeom.h"
+#include "AliITSgeomTGeo.h"
+#include "AliAlignObj.h"
+#include "AliITSRecPoint.h"
+#include "AliESDEvent.h"
+#include "AliESDtrack.h"
#include "AliITSRecPoint.h"
-#include "AliTPCtrack.h"
-#include "AliESD.h"
-#include "AliITSclusterV2.h"
+#include "AliITSReconstructor.h"
#include "AliITStrackerV2.h"
ClassImp(AliITStrackerV2)
-AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[kMaxLayer]; // ITS layers
+AliITStrackerV2::AliITSlayer AliITStrackerV2::fgLayers[AliITSgeomTGeo::kNLayers]; //ITS layers
+
+AliITStrackerV2::AliITStrackerV2():
+ AliTracker(),
+ fI(AliITSgeomTGeo::GetNLayers()),
+ fBestTrack(),
+ fTrackToFollow(),
+ fPass(0),
+ fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo())
+{
+ //--------------------------------------------------------------------
+ //This is the AliITStrackerV2 default constructor
+ //--------------------------------------------------------------------
+
+ for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) new(fgLayers+i-1) AliITSlayer();
+
+ fConstraint[0]=1; fConstraint[1]=0;
+
+ Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetZVdef()};
+ Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
+ SetVertex(xyz,ers);
+
+ for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
-AliITStrackerV2::AliITStrackerV2(const AliITSgeom *geom) : AliTracker() {
+}
+
+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<AliITSgeomTGeo::GetNLayers()+1; i++) new(fgLayers+i-1) AliITSlayer();
+
+ fConstraint[0]=t.fConstraint[0]; fConstraint[1]=t.fConstraint[1];
+
+ Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetZVdef()};
+ Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
+ 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<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=t.fLayersNotToSkip[i];
+
+}
+
+AliITStrackerV2::AliITStrackerV2(const Char_t *geom) :
+ AliTracker(),
+ fI(AliITSgeomTGeo::GetNLayers()),
+ fBestTrack(),
+ fTrackToFollow(),
+ fPass(0),
+ fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo())
+{
//--------------------------------------------------------------------
//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<AliITSgeomTGeo::GetNLayers()+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;
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 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;
+ 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[0]=0.; xyz[1]=0.; xyz[2]=0.;
+ m.LocalToMaster(txyz,xyz);
+ 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};
+ Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetZVdef()};
+ Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
+ AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
SetVertex(xyz,ers);
- for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
- fLastLayerToTrackTo=kLastLayerToTrackTo;
+ for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
}
//--------------------------------------------------------------------
//This function set masks of the layers which must be not skipped
//--------------------------------------------------------------------
- for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
+ for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
}
Int_t AliITStrackerV2::LoadClusters(TTree *cTree) {
//--------------------------------------------------------------------
//This function loads ITS clusters
//--------------------------------------------------------------------
- TBranch *branch=cTree->GetBranch("Clusters");
+ TBranch *branch=cTree->GetBranch("ITSRecPoints");
if (!branch) {
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;
- Int_t detector=0;
- for (Int_t i=0; i<kMaxLayer; i++) {
+ for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
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);
- detector = c->GetDetectorIndex();
- fgLayers[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();
- //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
}
//--------------------------------------------------------------------
//This function unloads ITS clusters
//--------------------------------------------------------------------
- for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
+ for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
}
static Int_t CorrectForDeadZoneMaterial(AliITStrackV2 *t) {
return 0;
}
-Int_t AliITStrackerV2::Clusters2Tracks(AliESD *event) {
+Int_t AliITStrackerV2::Clusters2Tracks(AliESDEvent *event) {
//--------------------------------------------------------------------
// This functions reconstructs ITS tracks
// The clusters must be already loaded !
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) {
+ AliITStrackV2 *t = new AliITStrackV2(*esd);
+
+ if (TMath::Abs(t->GetD(GetX(),GetY()))>4) {
delete t;
continue;
}
delete t;
continue;
}
- t->fReconstructed = kFALSE;
itsTracks.AddLast(t);
}
} /* End Read ESD tracks */
itsTracks.Sort();
Int_t nentr=itsTracks.GetEntriesFast();
- fTrackHypothesys.Expand(nentr);
- Int_t ntrk=0;
- for (fPass=0; fPass<2; fPass++) {
- Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
- for (Int_t i=0; i<nentr; i++) {
- cerr<<fPass<<" "<<i<<'\r';
- fCurrentEsdTrack = i;
- AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
- if (t==0) continue; //this track has been already tracked
- if (t->fReconstructed) continue; //this track was already "succesfully" reconstructed
- if ( (TMath::Abs(t->GetD(GetX(),GetY())) >2.) && fConstraint[fPass]) continue;
- if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>2.) && fConstraint[fPass]) continue;
-
- Int_t tpcLabel=t->GetLabel(); //save the TPC track label
-
- ResetTrackToFollow(*t);
- ResetBestTrack();
-
- for (FollowProlongation(); fI<kMaxLayer; fI++) {
- while (TakeNextProlongation()) {
- FollowProlongation();
- }
- }
-
- SortTrackHypothesys(fCurrentEsdTrack,0.9); //MI change
- CompressTrackHypothesys(fCurrentEsdTrack,0.90,2); //MI change
-
- /*
- if (fBestTrack.GetNumberOfClusters() == 0) continue;
-
- if (fConstraint[fPass]) {
- ResetTrackToFollow(*t);
- if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
- ResetBestTrack();
- }
-
- fBestTrack.SetLabel(tpcLabel);
- fBestTrack.CookdEdx();
- CookLabel(&fBestTrack,0.); //For comparison only
- fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
- //UseClusters(&fBestTrack);
- delete itsTracks.RemoveAt(i);
- ntrk++;
- */
- AliITStrackV2 * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,5);
- if (!besttrack) continue;
- besttrack->SetLabel(tpcLabel);
- besttrack->CookdEdx();
- besttrack->fFakeRatio=1.;
- CookLabel(besttrack,0.); //For comparison only
- // besttrack->UpdateESDtrack(AliESDtrack::kITSin);
-
- if (besttrack->GetChi2()/besttrack->GetNumberOfClusters()>3.5){
- if ( (TMath::Abs(besttrack->GetD(GetX(),GetY()))>0.4) && fConstraint[fPass]) {
- CompressTrackHypothesys(fCurrentEsdTrack,0.0,0);
- continue;
- }
- if ( (TMath::Abs(besttrack->GetZat(GetX()) -GetZ() )>0.4) && fConstraint[fPass]){
- CompressTrackHypothesys(fCurrentEsdTrack,0.0,0);
- continue;
- }
- }
-
- //delete itsTracks.RemoveAt(i);
- t->fReconstructed = kTRUE;
- ntrk++;
-
- }
- }
-
- for (Int_t i=0; i<nentr; i++) {
- fCurrentEsdTrack = i;
- AliITStrackV2 *t=(AliITStrackV2*)itsTracks.UncheckedAt(i);
- if (t==0) continue;
- Int_t tpcLabel=t->GetLabel(); //save the TPC track label
- cerr<<i<<'\r';
- AliITStrackV2 * besttrack = GetBestHypothesysMIP(fCurrentEsdTrack,t);
- if (!besttrack) continue;
-
- besttrack->SetLabel(tpcLabel);
- besttrack->CookdEdx();
- besttrack->fFakeRatio=1.;
- CookLabel(besttrack,0.); //For comparison only
- besttrack->UpdateESDtrack(AliESDtrack::kITSin);
- }
- //
-
- itsTracks.Delete();
- //
- Int_t entries = fTrackHypothesys.GetEntriesFast();
- for (Int_t ientry=0;ientry<entries;ientry++){
- TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
- if (array) array->Delete();
- delete fTrackHypothesys.RemoveAt(ientry);
- }
-
- fTrackHypothesys.Delete();
- Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
-
- return 0;
-}
-
-Int_t AliITStrackerV2::Clusters2Tracks(TTree *tpcTree, TTree *itsTree) {
- //--------------------------------------------------------------------
- // This functions reconstructs ITS tracks
- // The clusters must be already loaded !
- //--------------------------------------------------------------------
- Int_t nentr=0; TObjArray itsTracks(15000);
-
- Warning("Clusters2Tracks(TTree *, TTree *)",
- "Will be removed soon ! Use Clusters2Tracks(AliESD *) instead.");
-
- {/* Read TPC tracks */
- AliTPCtrack *itrack=new AliTPCtrack;
- TBranch *branch=tpcTree->GetBranch("tracks");
- if (!branch) {
- Error("Clusters2Tracks","Can't get the branch !");
- return 1;
- }
- tpcTree->SetBranchAddress("tracks",&itrack);
- nentr=(Int_t)tpcTree->GetEntries();
-
- Info("Clusters2Tracks","Number of TPC tracks: %d\n",nentr);
-
- for (Int_t i=0; i<nentr; i++) {
- tpcTree->GetEvent(i);
- AliITStrackV2 *t=0;
- try {
- t=new AliITStrackV2(*itrack);
- } catch (const Char_t *msg) {
- Warning("Clusters2Tracks",msg);
- delete t;
- continue;
- }
- if (TMath::Abs(t->GetD())>4) {
- delete t;
- continue;
- }
-
- if (CorrectForDeadZoneMaterial(t)!=0) {
- Warning("Clusters2Tracks",
- "failed to correct for the material in the dead zone !\n");
- delete t;
- continue;
- }
-
- itsTracks.AddLast(t);
- }
- delete itrack;
- }
- itsTracks.Sort();
- nentr=itsTracks.GetEntriesFast();
-
-
- AliITStrackV2 *otrack=&fBestTrack;
- TBranch *branch=itsTree->GetBranch("tracks");
- if (!branch) itsTree->Branch("tracks","AliITStrackV2",&otrack,32000,3);
- else branch->SetAddress(&otrack);
+ Int_t ntrk=0;
for (fPass=0; fPass<2; fPass++) {
Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
for (Int_t i=0; i<nentr; i++) {
ResetTrackToFollow(*t);
ResetBestTrack();
- for (FollowProlongation(); fI<kMaxLayer; fI++) {
+ for (FollowProlongation(); fI<AliITSgeomTGeo::GetNLayers(); fI++) {
while (TakeNextProlongation()) FollowProlongation();
}
if (fConstraint[fPass]) {
ResetTrackToFollow(*t);
- if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
+ if (!RefitAt(3.7, &fTrackToFollow, &fBestTrack)) continue;
ResetBestTrack();
}
fBestTrack.SetLabel(tpcLabel);
fBestTrack.CookdEdx();
CookLabel(&fBestTrack,0.); //For comparison only
- itsTree->Fill();
- //UseClusters(&fBestTrack);
+ fBestTrack.UpdateESDtrack(AliESDtrack::kITSin);
+ UseClusters(&fBestTrack);
delete itsTracks.RemoveAt(i);
+ ntrk++;
}
}
- nentr=(Int_t)itsTree->GetEntries();
- Info("Clusters2Tracks","Number of prolonged tracks: %d\n",nentr);
-
itsTracks.Delete();
+ Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
+
return 0;
}
-Int_t AliITStrackerV2::PropagateBack(AliESD *event) {
+Int_t AliITStrackerV2::PropagateBack(AliESDEvent *event) {
//--------------------------------------------------------------------
// This functions propagates reconstructed ITS tracks back
// The clusters must be loaded !
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;
- }
+ AliITStrackV2 *t = new AliITStrackV2(*esd);
ResetTrackToFollow(*t);
// 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()) {
+ if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
fTrackToFollow.StartTimeIntegral();
}
- fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
+ Bool_t okProp=fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
+ if(!okProp){
+ AliWarning("Propagation to beam pipe radius failed");
+ }
}
- fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
+ fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
if (RefitAt(49.,&fTrackToFollow,t)) {
if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
Warning("PropagateBack",
//fTrackToFollow.CookdEdx();
CookLabel(&fTrackToFollow,0.); //For comparison only
fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
- //UseClusters(&fTrackToFollow);
+ UseClusters(&fTrackToFollow);
ntrk++;
}
delete t;
return 0;
}
-Int_t AliITStrackerV2::RefitInward(AliESD *event) {
+Int_t AliITStrackerV2::RefitInward(AliESDEvent *event) {
//--------------------------------------------------------------------
// This functions refits ITS tracks using the
// "inward propagated" TPC tracks
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 {
- t=new AliITStrackV2(*esd);
- } catch (const Char_t *msg) {
- Warning("RefitInward",msg);
- delete t;
- continue;
- }
+ if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
+
+ AliITStrackV2 *t = new AliITStrackV2(*esd);
if (CorrectForDeadZoneMaterial(t)!=0) {
Warning("RefitInward",
ResetTrackToFollow(*t);
fTrackToFollow.ResetClusters();
- if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
- fTrackToFollow.ResetCovariance();
-
//Refitting...
- if (RefitAt(3.7, &fTrackToFollow, t)) {
+ if (RefitAt(3.7, &fTrackToFollow, t, kTRUE)) {
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++;
- }
+ CookLabel(&fTrackToFollow,0.); //For comparison only
+
+ if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
+ fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
+ AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
+ Double_t r[3]={0.,0.,0.};
+ Double_t maxD=3.;
+ esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
+ ntrk++;
}
}
delete t;
}
//find intersection
- Double_t x,y,z;
- if (!fTrackToFollow.GetGlobalXYZat(r,x,y,z)) {
+ 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) {
//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 dz=7*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
+ Double_t dy=7*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(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]);
+ //Double_t dz=4*TMath::Sqrt(track.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
if (dz < 0.5*TMath::Abs(track.GetTgl())) dz=0.5*TMath::Abs(track.GetTgl());
- if (dz > kMaxRoad) {
+ if (dz > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) {
//Warning("FollowProlongation","too broad road in Z !\n");
return;
}
- // if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
+ if (TMath::Abs(fTrackToFollow.GetZ()-GetZ()) > r+dz) return;
- //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + kSigmaY2[i]);
- if (TMath::Abs(track.GetSnp()>kMaxSnp)) {
- fI--;
- continue; // MI
- }
+ //Double_t dy=4*TMath::Sqrt(track.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(i));
if (dy < 0.5*TMath::Abs(track.GetSnp())) dy=0.5*TMath::Abs(track.GetSnp());
- if (dy > kMaxRoad) {
+ if (dy > AliITSReconstructor::GetRecoParam()->GetMaxRoad()) {
//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;
+
+ if (!TakeNextProlongation())
+ if (fLayersNotToSkip[fI]) return;
- //take another prolongation
- if (!TakeNextProlongation()){
- //skipped++;
- fTrackToFollow.fNSkipped++;
- if (fLayersNotToSkip[fI]||fTrackToFollow.fNSkipped>1) return;
- }
- if (fTrackToFollow.fNUsed>1) return;
- if (fTrackToFollow.fNUsed+fTrackToFollow.fNSkipped>1) return;
- if ( (fI<3) && ( fTrackToFollow.GetChi2()/fTrackToFollow.GetNumberOfClusters()>kChi2PerCluster)) return;
}
//deal with the best track
Int_t ncl=fTrackToFollow.GetNumberOfClusters();
Int_t nclb=fBestTrack.GetNumberOfClusters();
- if (ncl){
- if (ncl<4) return;
- if ( (ncl<6) && (fTrackToFollow.GetChi2()/float(ncl))>3) return;
- if (fTrackToFollow.GetChi2()/ncl>5.5) return;
- fTrackToFollow.CookdEdx();
- if (fTrackToFollow.fESDtrack->GetTPCsignal()>80.)
- if ((fTrackToFollow.GetdEdx()/fTrackToFollow.fESDtrack->GetTPCsignal())<0.35){
- // mismatch in dedx
- return;
- }
- //
- fTrackToFollow.SetLabel(fTrackToFollow.fESDtrack->GetLabel());
- CookLabel(&fTrackToFollow,0.); //
- //
- if ( (nclb>3) && ((fTrackToFollow.GetChi2()/ncl)<(3*fBestTrack.GetChi2()/(nclb))))
- AddTrackHypothesys(new AliITStrackV2(fTrackToFollow), fCurrentEsdTrack);
- else
- if (ncl>3) AddTrackHypothesys(new AliITStrackV2(fTrackToFollow), fCurrentEsdTrack);
- if (ncl >= nclb) {
- Double_t chi2=fTrackToFollow.GetChi2();
- if (chi2/ncl < kChi2PerCluster) {
- if (ncl > nclb ) {
- ResetBestTrack();
+ if (ncl)
+ if (ncl >= nclb) {
+ Double_t chi2=fTrackToFollow.GetChi2();
+ if (chi2/ncl < AliITSReconstructor::GetRecoParam()->GetChi2PerCluster()) {
+ if (ncl > nclb || chi2 < fBestTrack.GetChi2()) {
+ ResetBestTrack();
}
- if ( (ncl == nclb) && chi2 < fBestTrack.GetChi2()) {
- ResetBestTrack();
- }
- }
- }
+ }
}
+
}
Int_t AliITStrackerV2::TakeNextProlongation() {
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 dz=7*TMath::Sqrt(fTrackToFollow.GetSigmaZ2() + AliITSReconstructor::GetRecoParam()->GetSigmaZ2(fI));
+ Double_t dy=7*TMath::Sqrt(fTrackToFollow.GetSigmaY2() + AliITSReconstructor::GetRecoParam()->GetSigmaY2(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.;
+ const AliITSRecPoint *c=0; Int_t ci=-1;
+ const AliITSRecPoint *cc=0; Int_t cci=-1;
+ Double_t chi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2();
while ((c=layer.GetNextCluster(ci))!=0) {
Int_t idet=c->GetDetectorIndex();
+
if (fTrackToFollow.GetDetectorIndex()!=idet) {
const AliITSdetector &det=layer.GetDetector(idet);
ResetTrackToFollow(fTracks[fI]);
if (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;
}
- 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 (!cc) return 0;
- if (!fTrackToFollow.Update(c,chi2,(fI<<28)+ci)) {
+ {// 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 (c->IsUsed()&&c->GetNy()<5) fTrackToFollow.fNUsed++;
+
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(),fI-2); //b.b.
{
Double_t x0;
Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
Double_t xyz[]={GetX(),GetY(),GetZ()};
Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
- Double_t deltad = TMath::Abs(fTrackToFollow.GetD(GetX(),GetY()));
- Double_t deltaz = TMath::Abs(fTrackToFollow.GetZat(GetX())-GetZ());
-
- if ( (fI==4) && (deltad>2.0 || deltaz>1.5)) return 0; // don't "improve" secondaries
- if ( (fI==3) && (deltad>1.5 || deltaz>0.9)) return 0; // don't "improve" secondaries
- if ( (fI==2) && (deltad>0.9 || deltaz>0.6)) return 1; // don't "improve" secondaries
- if ( (fI==1) && (deltad>0.3 || deltaz>0.3)) return 1; // don't "improve" secondaries
- if ( (fI==0) && (deltad>0.1 || deltaz>0.1)) return 1; // don't "improve" secondaries
-
fTrackToFollow.Improve(d,xyz,ers);
}
}
-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;
+ for (Int_t i=0; i<AliITSRecoParam::kMaxClusterPerLayer; i++){
+ fClusters[i]=0;
+ fIndex[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;
- fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
+ for (Int_t i=0; i<AliITSRecoParam::kMaxClusterPerLayer; i++){
+ fClusters[i]=0;
+ fIndex[i]=0;
+ }
}
AliITStrackerV2::AliITSlayer::~AliITSlayer() {
// AliITSlayer destructor
//--------------------------------------------------------------------
delete[] fDetectors;
- for (Int_t i=0; i<fN; i++) delete fClusters[i];
- for (Int_t i=0; i<kMaxClusterPerLayer;i++) fClusterWeight[i]=0;
+ ResetClusters();
}
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;
+ 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) {
- ::Error("InsertCluster","Too many clusters !\n");
- return 1;
+ 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);
return d/(xn*xn);
}
-Int_t AliITStrackerV2::AliITSlayer::InRoad() const {
- //--------------------------------------------------------------------
- // This function returns number of clusters within the "window"
- //--------------------------------------------------------------------
- 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++;
- }
- return ncl;
-}
-
-Bool_t
-AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,const AliITStrackV2 *c) {
+Bool_t AliITStrackerV2::RefitAt(Double_t xx,AliITStrackV2 *t,
+ const AliITStrackV2 *c, Bool_t extra) {
//--------------------------------------------------------------------
// 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 index[kMaxLayer];
+ Int_t index[AliITSgeomTGeo::kNLayers];
Int_t k;
- for (k=0; k<kMaxLayer; k++) index[k]=-1;
+ for (k=0; k<AliITSgeomTGeo::GetNLayers(); 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;
Int_t from, to, step;
if (xx > t->GetX()) {
- from=0; to=kMaxLayer;
+ from=0; to=AliITSgeomTGeo::GetNLayers();
step=+1;
} else {
- from=kMaxLayer-1; to=-1;
+ from=AliITSgeomTGeo::GetNLayers()-1; to=-1;
step=-1;
}
{
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;
- }
+ if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
+ Int_t iLay = i-step;
+ Double_t rs = 0.;
+ if(iLay<0 || iLay>= AliITSgeomTGeo::kNLayers){
+ AliError(Form("Invalid layer %d ",iLay));
+ return kFALSE;
+ }
+ else{
+ 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;
+ }
}
}
}
//
- Double_t x,y,z;
- if (!t->GetGlobalXYZat(r,x,y,z)) {
+ 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;
- Double_t maxchi2=kMaxChi2;
+ const AliITSRecPoint *cl=0;
+ Double_t maxchi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2();
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())) {
+ if (idx>=0) {
+ const AliITSRecPoint *ccc=(AliITSRecPoint *)GetCluster(idx);
+ if (idet != ccc->GetDetectorIndex()) {
+ idet=ccc->GetDetectorIndex();
+ const AliITSdetector &det2=layer.GetDetector(idet);
+ if (!t->Propagate(det2.GetPhi(),det2.GetR())) {
return kFALSE;
}
t->SetDetectorIndex(idet);
}
- Double_t chi2=t->GetPredictedChi2(c);
+ Double_t chi2=t->GetPredictedChi2(ccc);
if (chi2<maxchi2) {
- cl=c;
+ cl=ccc;
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) {
+ // 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);
+ t->SetSampledEdx(cl->GetQ(),i-2);
}
{
t->CorrectForMaterial(-step*d,x0);
}
+ if (extra) { //search for extra clusters
+ AliITStrackV2 tmp(*t);
+ Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
+ if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
+ Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(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 AliITSRecPoint *cx=0; Int_t ci=-1,cci=-1;
+ maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
+ Double_t tolerance=0.1;
+ while ((cx=layer.GetNextCluster(ci))!=0) {
+ if (idet == cx->GetDetectorIndex()) continue;
+
+ const AliITSdetector &detx=layer.GetDetector(cx->GetDetectorIndex());
+
+ if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
+
+ if (TMath::Abs(tmp.GetZ() - cx->GetZ()) > tolerance) continue;
+ if (TMath::Abs(tmp.GetY() - cx->GetY()) > tolerance) continue;
+
+ Double_t chi2=tmp.GetPredictedChi2(cx);
+ if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
+ }
+ if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
+ }
+
// track time update [SR, GSI 17.02.2003]
if (t->IsStartedTimeIntegral() && step==1) {
Double_t newX, newY, newZ;
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);
+ Int_t clusterIndex = t->GetClusterIndex(0);
+ AliITSRecPoint *c= 0x0;
- delete [] chi2;
- delete [] index;
+ 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();
-
-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