* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$ */
+
///////////////////////////////////////////////////////////////////////////
// Implementation of the ITS track class
//
#include <TMath.h>
#include "AliCluster.h"
-#include "AliTracker.h"
#include "AliESDtrack.h"
+#include "AliESDVertex.h"
+#include "AliITSReconstructor.h"
#include "AliITStrackV2.h"
+#include "AliTracker.h"
const Int_t AliITStrackV2::fgkWARN = 5;
fdEdx(0),
fESDtrack(0)
{
- for(Int_t i=0; i<2*kMaxLayer; i++) fIndex[i]=-1;
- for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
+ for(Int_t i=0; i<2*AliITSgeomTGeo::kNLayers; i++) {fIndex[i]=-1; fModule[i]=-1;}
+ for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
}
for(Int_t i=0; i<4; i++) fdEdxSample[i]=0;
}
+//____________________________________________________________________________
+void AliITStrackV2::ResetClusters() {
+ //------------------------------------------------------------------
+ // Reset the array of attached clusters.
+ //------------------------------------------------------------------
+ for (Int_t i=0; i<2*AliITSgeomTGeo::kNLayers; i++) fIndex[i]=-1;
+ SetChi2(0.);
+ SetNumberOfClusters(0);
+}
+
void AliITStrackV2::UpdateESDtrack(ULong_t flags) const {
fESDtrack->UpdateTrackParams(this,flags);
+ // copy the module indices
+ for(Int_t i=0;i<12;i++) {
+ // printf(" %d\n",GetModuleIndex(i));
+ fESDtrack->SetITSModuleIndex(i,GetModuleIndex(i));
+ }
}
//____________________________________________________________________________
//------------------------------------------------------------------
Int_t i;
for (i=0; i<4; i++) fdEdxSample[i]=t.fdEdxSample[i];
- for (i=0; i<2*kMaxLayer; i++) fIndex[i]=t.fIndex[i];
+ for (i=0; i<2*AliITSgeomTGeo::GetNLayers(); i++) {
+ fIndex[i]=t.fIndex[i];
+ fModule[i]=t.fModule[i];
+ }
}
//_____________________________________________________________________________
//This function propagates a track to the minimal distance from the origin
//------------------------------------------------------------------
Double_t bz=GetBz();
- if (PropagateToDCA(v,bz,kVeryBig))
- if (AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass())) return kTRUE;
+ if (PropagateToDCA(v,bz,kVeryBig)) {
+ Double_t xOverX0,xTimesRho;
+ xOverX0 = d; xTimesRho = d*x0;
+ if (CorrectForMeanMaterial(xOverX0,xTimesRho,kTRUE)) return kTRUE;
+ }
return kFALSE;
}
//____________________________________________________________________________
Bool_t AliITStrackV2::
-GetGlobalXYZat(Double_t xk, Double_t &x, Double_t &y, Double_t &z) const {
+GetGlobalXYZat(Double_t xloc, Double_t &x, Double_t &y, Double_t &z) const {
//------------------------------------------------------------------
//This function returns a track position in the global system
//------------------------------------------------------------------
Double_t r[3];
- Bool_t rc=GetXYZAt(xk, AliTracker::GetBz(), r);
+ Bool_t rc=GetXYZAt(xloc, GetBz(), r);
x=r[0]; y=r[1]; z=r[2];
return rc;
}
Double_t bz=GetBz();
if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE;
- if (!AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass())) return kFALSE;
+ Double_t xOverX0,xTimesRho;
+ xOverX0 = d; xTimesRho = d*x0;
+ if (!CorrectForMeanMaterial(xOverX0,xTimesRho,kTRUE)) return kFALSE;
Double_t x=GetX(), y=GetY(), z=GetZ();
if (IsStartedTimeIntegral() && x>oldX) {
}
//____________________________________________________________________________
-Bool_t AliITStrackV2::PropagateToTGeo(Double_t xToGo, Int_t nstep) {
+Bool_t AliITStrackV2::PropagateToTGeo(Double_t xToGo, Int_t nstep, Double_t &xOverX0, Double_t &xTimesRho, Bool_t addTime) {
//-------------------------------------------------------------------
// Propagates the track to a reference plane x=xToGo in n steps.
// These n steps are only used to take into account the curvature.
if (!GetXYZAt(x, bz, end)) return kFALSE;
if (!AliExternalTrackParam::PropagateTo(x, bz)) return kFALSE;
AliTracker::MeanMaterialBudget(start, end, mparam);
- //printf("mparam: %f %f %f %f %f %f %f\n",mparam[0],mparam[1],mparam[2],mparam[3],mparam[4],mparam[5],mparam[6]);
if (mparam[1]<900000) {
- Double_t lengthTimesMeanDensity = sign*mparam[4]*mparam[0];
- Double_t xOverX0 = mparam[1];
- //printf("%f %f %f CorrectForMeanMaterial(%f,%f)\n",startx,xToGo,sign,xOverX0,lengthTimesMeanDensity);
+ xTimesRho = sign*mparam[4]*mparam[0];
+ xOverX0 = mparam[1];
if (!AliExternalTrackParam::CorrectForMeanMaterial(xOverX0,
- lengthTimesMeanDensity,GetMass())) return kFALSE;
+ xTimesRho,GetMass())) return kFALSE;
}
}
- if (IsStartedTimeIntegral() && GetX()>startx) {
+ if (addTime && IsStartedTimeIntegral() && GetX()>startx) {
Double_t l2 = ( (GetX()-startx)*(GetX()-startx) +
(GetY()-starty)*(GetY()-starty) +
(GetZ()-startz)*(GetZ()-startz) );
if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
+ Int_t n=GetNumberOfClusters();
if (!Invariant()) {
- AliWarning("Wrong invariant !");
+ if (n>fgkWARN) AliWarning("Wrong invariant !");
return kFALSE;
}
if (chi2<0) return kTRUE;
- Int_t n=GetNumberOfClusters();
+ // fill residuals for ITS+TPC tracks
+ if (fESDtrack) {
+ if (fESDtrack->GetStatus()&AliESDtrack::kTPCin) {
+ AliTracker::FillResiduals(this,p,cov,c->GetVolumeId());
+ }
+ }
+
fIndex[n]=index;
SetNumberOfClusters(n+1);
SetChi2(GetChi2()+chi2);
//------------------------------------------------------------------
Int_t n=GetNumberOfClusters();
+ // take into account the misalignment error
+ Float_t maxMisalErrY2=0,maxMisalErrZ2=0;
+ for (Int_t lay=0; lay<AliITSgeomTGeo::kNLayers; lay++) {
+ maxMisalErrY2 = TMath::Max(maxMisalErrY2,AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(lay));
+ maxMisalErrZ2 = TMath::Max(maxMisalErrZ2,AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(lay));
+ }
+ maxMisalErrY2 *= maxMisalErrY2;
+ maxMisalErrZ2 *= maxMisalErrZ2;
+ // this is because when we reset before refitting, we multiply the
+ // matrix by 10
+ maxMisalErrY2 *= 10.;
+ maxMisalErrZ2 *= 10.;
+
Double_t sP2=GetParameter()[2];
if (TMath::Abs(sP2) >= kAlmost1){
if (n>fgkWARN) Warning("Invariant","fP2=%f\n",sP2);
return kFALSE;
}
Double_t sC00=GetCovariance()[0];
- if (sC00<=0 || sC00>9.) {
+ if (sC00<=0 || sC00>(9.+maxMisalErrY2)) {
if (n>fgkWARN) Warning("Invariant","fC00=%f\n",sC00);
return kFALSE;
}
Double_t sC11=GetCovariance()[2];
- if (sC11<=0 || sC11>9.) {
+ if (sC11<=0 || sC11>(9.+maxMisalErrZ2)) {
if (n>fgkWARN) Warning("Invariant","fC11=%f\n",sC11);
return kFALSE;
}
if (!AliExternalTrackParam::Propagate(alp,xk,bz)) return kFALSE;
if (!Invariant()) {
- AliWarning("Wrong invariant !");
- return kFALSE;
+ Int_t n=GetNumberOfClusters();
+ if (n>fgkWARN) AliWarning("Wrong invariant !");
+ return kFALSE;
}
return kTRUE;
if (nstep<1) nstep = 1;
step = (GetX()-vertexX)/nstep;
- Double_t mparam[7], densMean=0, radLength=0, length=0;
+ // Double_t mparam[7], densMean=0, radLength=0, length=0;
+ Double_t mparam[7];
Double_t p1[3], p2[3], x = GetX(), bz = GetBz();
GetXYZ(p1);
SetdEdx(dedx);
}
-Double_t AliITStrackV2::GetBz() const {
- //
- // returns Bz component of the magnetic field (kG)
- //
- if (AliTracker::UniformField()) return AliTracker::GetBz();
- Double_t r[3]; GetXYZ(r);
- return AliTracker::GetBz(r);
-}
+//____________________________________________________________________________
+Bool_t AliITStrackV2::
+GetPhiZat(Double_t r, Double_t &phi, Double_t &z) const {
+ //------------------------------------------------------------------
+ // This function returns the global cylindrical (phi,z) of the track
+ // position estimated at the radius r.
+ // The track curvature is neglected.
+ //------------------------------------------------------------------
+ Double_t d=GetD(0.,0.);
+ if (TMath::Abs(d) > r) return kFALSE;
+
+ Double_t rcurr=TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
+ if (TMath::Abs(d) > rcurr) return kFALSE;
+ Double_t phicurr=GetAlpha()+TMath::ASin(GetSnp());
+ phi=phicurr+TMath::ASin(d/r)-TMath::ASin(d/rcurr);
+ z=GetZ()+GetTgl()*(TMath::Sqrt((r-d)*(r+d))-TMath::Sqrt((rcurr-d)*(rcurr+d)));
+ return kTRUE;
+}
//____________________________________________________________________________
Bool_t AliITStrackV2::
-GetPhiZat(Double_t rk, Double_t &phik, Double_t &zk) const {
+GetLocalXat(Double_t r,Double_t &xloc) const {
//------------------------------------------------------------------
- // This function returns the global cylindrical (phik,zk) of the track
- // position estimated at the radius rk.
+ // This function returns the local x of the track
+ // position estimated at the radius r.
// The track curvature is neglected.
//------------------------------------------------------------------
Double_t d=GetD(0.,0.);
- if (TMath::Abs(d) > rk) return kFALSE;
+ if (TMath::Abs(d) > r) return kFALSE;
- Double_t r=TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
- Double_t phi=GetAlpha()+TMath::ASin(GetSnp());
+ Double_t rcurr=TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
+ Double_t phicurr=GetAlpha()+TMath::ASin(GetSnp());
+ Double_t phi=phicurr+TMath::ASin(d/r)-TMath::ASin(d/rcurr);
- phik=phi+TMath::ASin(d/rk)-TMath::ASin(d/r);
- zk=GetZ()+GetTgl()*(TMath::Sqrt(rk*rk-d*d) - TMath::Sqrt(r*r-d*d));
+ xloc=r*(TMath::Cos(phi)*TMath::Cos(GetAlpha())
+ +TMath::Sin(phi)*TMath::Sin(GetAlpha()));
return kTRUE;
}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff