////
if (this!=&t) {
fNClusters=t.fNClusters;
- fNStoredClusters=fNStoredClusters;
delete fClusters;
if (t.fClusters) {
fClusters=new AliTPCclusterMI[t.fNStoredClusters];
delete fPrimary;
}
-void AliTPCTracklet::FitKalman(const AliTPCseed *track,Int_t sector) {
+
+
+
+
+void AliTPCTracklet::FitKalman(const AliTPCseed *seed,Int_t sector) {
//
// Fit using Kalman filter
//
- AliTPCseed *t=new AliTPCseed(*track);
- if (!t->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-t->GetAlpha())) {
- delete t;
+ AliTPCseed *track=new AliTPCseed(*seed);
+ if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
+ delete track;
return;
}
// fit from inner to outer row
- AliTPCseed *outerSeed=new AliTPCseed(*t);
- Int_t n=0;
- for (Int_t i=0;i<160;++i) {
- AliTPCclusterMI *c=t->GetClusterPointer(i);
- if (c && RejectCluster(c,outerSeed)) continue;
- if (c&&c->GetDetector()==sector) {
- if (n==1) {
- outerSeed->ResetCovariance(100.);
- }
- ++n;
- Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
- Double_t cov[3]={0.1,0.,0.1}; //TODO: correct error parametrisation
- if (!outerSeed->PropagateTo(r[0]) ||
- !static_cast<AliExternalTrackParam*>(outerSeed)->Update(&r[1],cov)) {
- delete outerSeed;
- outerSeed=0;
- break;
- }
+ Double_t covar[15];
+ for (Int_t i=0;i<15;i++) covar[i]=0;
+ covar[0]=1.*1.;
+ covar[2]=1.*1.;
+ covar[5]=1.*1./(64.*64.);
+ covar[9]=1.*1./(64.*64.);
+ covar[14]=0; // keep pt
+ Float_t xmin=1000, xmax=-10000;
+ Int_t imin=158, imax=0;
+ for (Int_t i=0;i<160;i++) {
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c) continue;
+ if (c->GetDetector()!=sector) continue;
+ if (c->GetX()<xmin) xmin=c->GetX();
+ if (c->GetX()>xmax) xmax=c->GetX();
+ if (i<imin) imin=i;
+ if (i>imax) imax=i;
+ }
+ if(imax-imin<10) {
+ delete track;
+ return;
+ }
+
+ for (Float_t x=track->GetX(); x<xmin; x++) track->PropagateTo(x);
+ track->AddCovariance(covar);
+ //
+ AliExternalTrackParam paramIn;
+ AliExternalTrackParam paramOut;
+ Bool_t isOK=kTRUE;
+ //
+ //
+ //
+ for (Int_t i=imin; i<=imax; i++){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c) continue;
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
+ AliTPCseed::GetError(c, track,cov[0],cov[2]);
+ cov[0]*=cov[0];
+ cov[2]*=cov[2];
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ break;
}
+ if (RejectCluster(c,track)) continue;
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
}
- if (outerSeed)
- fOuter=new AliExternalTrackParam(*outerSeed);
- delete outerSeed;
- // fit from outer to inner rows
- AliTPCseed *innerSeed=new AliTPCseed(*t);
- n=0;
- for (Int_t i=159;i>=0;--i) {
- AliTPCclusterMI *c=t->GetClusterPointer(i);
- if (c && RejectCluster(c, innerSeed)) continue;
- if (c&&c->GetDetector()==sector) {
- if (n==1) {
- innerSeed->ResetCovariance(100.);
- }
- ++n;
- Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
- Double_t cov[3]={0.1,0.,0.1};
- if (!innerSeed->PropagateTo(r[0]) ||
- !static_cast<AliExternalTrackParam*>(innerSeed)->Update(&r[1],cov)) {
- delete innerSeed;
- innerSeed=0;
- break;
- }
+ if (!isOK) { delete track; return;}
+ track->AddCovariance(covar);
+ //
+ //
+ //
+ for (Int_t i=imax; i>=imin; i--){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c) continue;
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01};
+ AliTPCseed::GetError(c, track,cov[0],cov[2]);
+ cov[0]*=cov[0];
+ cov[2]*=cov[2];
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ break;
}
+ if (RejectCluster(c,track)) continue;
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
}
- if (innerSeed)
- fInner=new AliExternalTrackParam(*innerSeed);
- // propagate to the primary vertex
- if (innerSeed) {
- AliTPCseed *primarySeed=new AliTPCseed(*innerSeed);
- Double_t pos[]={0.,0.,0.};
- Double_t sigma[]={.1,.1,.1}; //TODO: is this correct?
- AliESDVertex vertex(pos,sigma);
- if (primarySeed->PropagateToVertex(&vertex))
- fPrimary=new AliExternalTrackParam(*primarySeed);
- delete primarySeed;
- // for better comparison one does not want to have alpha changed...
- if (fPrimary) if (!fPrimary->Rotate(fInner->GetAlpha())) {
- delete fPrimary;
- fPrimary=0;
+ if (!isOK) { delete track; return;}
+ paramIn = *track;
+ track->AddCovariance(covar);
+ //
+ //
+ for (Int_t i=imin; i<=imax; i++){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c) continue;
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01};
+ AliTPCseed::GetError(c, track,cov[0],cov[2]);
+ cov[0]*=cov[0];
+ cov[2]*=cov[2];
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ break;
}
+ if (RejectCluster(c,track)) continue;
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
}
- delete innerSeed;
-
- delete t;
+ if (!isOK) { delete track; return;}
+ paramOut=*track;
+ //
+ //
+ //
+ fOuter=new AliExternalTrackParam(paramOut);
+ fInner=new AliExternalTrackParam(paramIn);
+ //
+ delete track;
}
+
+
+
void AliTPCTracklet::FitLinear(const AliTPCseed *track,Int_t sector,
TrackType type) {
TLinearFitter fy(1);
Double_t R=.5*TMath::Sqrt(4.*a[0]+a[1]*a[1]+a[2]*a[2]);
Double_t dx=x0-xr0;
if (dx*dx>=R*R) return kFALSE;
- Double_t dy=TMath::Sqrt(R*R-dx*dx); //sign!!
+ Double_t dy=TMath::Sqrt((R-dx)*(R+dx)); //sign!!
if (TMath::Abs(yr0+dy)>TMath::Abs(yr0-dy))
dy=-dy;
Double_t y0=yr0+dy;
t2m=new AliExternalTrackParam(*t2.GetOuter());
}
Double_t mx=.5*(t1m->GetX()+t2m->GetX());
- Double_t b1,b2;
+ //Double_t b1,b2;
Double_t xyz[3];
t1m->GetXYZ(xyz);
- b1=GetBz(xyz);
+ //b1=GetBz(xyz);
+ Double_t b1[3]; AliTracker::GetBxByBz(xyz,b1);
t2m->GetXYZ(xyz);
- b2=GetBz(xyz);
+ //b2=GetBz(xyz);
+ Double_t b2[3]; AliTracker::GetBxByBz(xyz,b2);
if (t1m->Rotate(t2m->GetAlpha())
- && t1m->PropagateTo(mx,b1)
- && t2m->PropagateTo(mx,b2));
+ //&& t1m->PropagateTo(mx,b1)
+ //&& t2m->PropagateTo(mx,b2));
+ && t1m->PropagateToBxByBz(mx,b1)
+ && t2m->PropagateToBxByBz(mx,b2));
else
if (t2m->Rotate(t1m->GetAlpha())
- && t1m->PropagateTo(mx,b1)
- && t2m->PropagateTo(mx,b2));
+ //&& t1m->PropagateTo(mx,b1)
+ //&& t2m->PropagateTo(mx,b2));
+ && t1m->PropagateToBxByBz(mx,b1)
+ && t2m->PropagateToBxByBz(mx,b2));
else {
delete t1m;
delete t2m;
return t1m&&t2m;
}
-double AliTPCTracklet::GetBz(Double_t *xyz) {
- if (AliTracker::UniformField())
- return AliTracker::GetBz();
- else
- return AliTracker::GetBz(xyz);
+double AliTPCTracklet::GetBz(Double_t *xyz)
+{
+ return AliTracker::GetBz(xyz);
}
void AliTPCTracklet::RandomND(Int_t ndim,const Double_t *p,const Double_t *c,
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff