* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.15 2002/11/25 09:33:30 hristov
-Tracking of secondaries (M.Ivanov)
-
-Revision 1.14 2002/10/23 13:45:00 hristov
-Fatal if no magnetic field set for the reconstruction (Y.Belikov)
-
-Revision 1.13 2002/10/23 07:17:34 alibrary
-Introducing Riostream.h
-
-Revision 1.12 2002/10/14 14:57:43 hristov
-Merging the VirtualMC branch to the main development branch (HEAD)
-
-Revision 1.9.6.1 2002/10/11 08:34:48 hristov
-Updating VirtualMC to v3-09-02
-
-Revision 1.11 2002/07/19 07:34:42 kowal2
-Logs added
-
-*/
-
+/* $Id$ */
//-----------------------------------------------------------------
// Implementation of the TPC track class
-//
-// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+// This class is used by the AliTPCtracker class
+// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-----------------------------------------------------------------
#include <Riostream.h>
#include "AliTPCtrack.h"
-#include "AliTPCcluster.h"
-#include "AliTPCClustersRow.h"
-#include "AliTPCClustersArray.h"
+#include "AliCluster.h"
+#include "AliBarrelTrack.h"
+#include "AliESDtrack.h"
ClassImp(AliTPCtrack)
+//_________________________________________________________________________
+AliTPCtrack::AliTPCtrack(): AliKalmanTrack()
+{
+ fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0;
+ fAlpha = fdEdx = 0.0;
+ fNWrong = fNRotation = fNumber = 0; // [SR, 01.04.2003]
+}
+
//_________________________________________________________________________
AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5],
const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
}
+//_____________________________________________________________________________
+AliTPCtrack::AliTPCtrack(const AliESDtrack& t) : AliKalmanTrack() {
+ //-----------------------------------------------------------------
+ // Conversion AliESDtrack -> AliTPCtrack.
+ //-----------------------------------------------------------------
+ SetNumberOfClusters(t.GetTPCclusters(fIndex));
+ SetLabel(t.GetLabel());
+ SetMass(t.GetMass());
+
+ fdEdx = t.GetTPCsignal();
+ fAlpha = t.GetAlpha();
+ if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
+ else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
+
+ //Conversion of the track parameters
+ Double_t x,p[5]; t.GetExternalParameters(x,p);
+ fX=x; x=GetConvConst();
+ fP0=p[0];
+ fP1=p[1];
+ fP3=p[3];
+ fP4=p[4]/x;
+ fP2=fP4*fX - p[2];
+
+ //Conversion of the covariance matrix
+ Double_t c[15]; t.GetExternalCovariance(c);
+ c[10]/=x; c[11]/=x; c[12]/=x; c[13]/=x; c[14]/=x*x;
+
+ Double_t c22=fX*fX*c[14] - 2*fX*c[12] + c[5];
+ Double_t c32=fX*c[13] - c[8];
+ Double_t c20=fX*c[10] - c[3], c21=fX*c[11] - c[4], c42=fX*c[14] - c[12];
+
+ fC00=c[0 ];
+ fC10=c[1 ]; fC11=c[2 ];
+ fC20=c20; fC21=c21; fC22=c22;
+ fC30=c[6 ]; fC31=c[7 ]; fC32=c32; fC33=c[9 ];
+ fC40=c[10]; fC41=c[11]; fC42=c42; fC43=c[13]; fC44=c[14];
+
+ if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
+ StartTimeIntegral();
+ Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
+ SetIntegratedLength(t.GetIntegratedLength());
+}
+
//_____________________________________________________________________________
AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) {
//-----------------------------------------------------------------
Int_t n=GetNumberOfClusters();
for (Int_t i=0; i<n; i++) fIndex[i]=t.fIndex[i];
}
+//_____________________________________________________________________________
+void AliTPCtrack::GetBarrelTrack(AliBarrelTrack *track) {
+ //
+ // Create a Barrel Track out of this track
+ // Current track is propagated to the reference plane
+ // by the tracker
+ //
+ // [SR, 01.04.2003]
+
+ if (!track) return;
+ Double_t xr, vec[5], cov[15];
+
+ track->SetLabel(GetLabel());
+ track->SetX(fX, fAlpha);
+ track->SetNClusters(GetNumberOfClusters(), GetChi2());
+ Double_t times[10];
+ GetIntegratedTimes(times);
+ track->SetTime(times, GetIntegratedLength());
+
+ track->SetMass(GetMass());
+ track->SetdEdX(GetdEdx());
+
+ track->SetNWrongClusters(fNWrong);
+ track->SetNRotate(fNRotation);
+
+ GetExternalParameters(xr, vec);
+ track->SetStateVector(vec);
+
+ GetExternalCovariance(cov);
+ track->SetCovarianceMatrix(cov);
+
+}
//_____________________________________________________________________________
Int_t AliTPCtrack::Compare(const TObject *o) const {
//-----------------------------------------------------------------
return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
}
+Double_t AliTPCtrack::GetYat(Double_t xk) const {
+//-----------------------------------------------------------------
+// This function calculates the Y-coordinate of a track at the plane x=xk.
+//-----------------------------------------------------------------
+ Double_t c1=fP4*fX - fP2, r1=TMath::Sqrt(1.- c1*c1);
+ Double_t c2=fP4*xk - fP2, r2=TMath::Sqrt(1.- c2*c2);
+ return fP0 + (xk-fX)*(c1+c2)/(r1+r2);
+}
+
//_____________________________________________________________________________
Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho) {
//-----------------------------------------------------------------
//if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
return 0;
}
+
+ // old position for time [SR, GSI 17.02.2003]
+ Double_t oldX = fX;
+ Double_t oldY = fP0;
+ Double_t oldZ = fP1;
+ //
Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=fP0, z1=fP1;
Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1);
fP4*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
fP2+=fX*(fP4-cc);
+ // Integrated Time [SR, GSI, 17.02.2003]
+ if (IsStartedTimeIntegral()) {
+ Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+(fP1-oldZ)*(fP1-oldZ);
+ AddTimeStep(TMath::Sqrt(l2));
+ }
+ //
+
return 1;
}
//-----------------------------------------------------------------
// This function associates a cluster with this track.
//-----------------------------------------------------------------
+
+ // update the number of wrong SR[20.03.2003]
+ Int_t absLabel = TMath::Abs(GetLabel());
+ if ( (c->GetLabel(0) != absLabel) &&
+ (c->GetLabel(0) != absLabel) &&
+ (c->GetLabel(0) != absLabel)) fNWrong++;
+ //
+
Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
r00+=fC00; r01+=fC10; r11+=fC11;
Double_t det=r00*r11 - r01*r01;
//-----------------------------------------------------------------
// This function rotates this track.
//-----------------------------------------------------------------
+
+ if (alpha != 0) fNRotation++; // [SR, 01.04.2003]
+
fAlpha += alpha;
if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
////////////////////////////////////////////////////////////////////////
Double_t AliTPCtrack::Phi() const {
-
+//
+//
+//
Double_t phi = TMath::ASin(GetSnp()) + fAlpha;
if (phi<0) phi+=2*TMath::Pi();
if (phi>=2*TMath::Pi()) phi-=2*TMath::Pi();
}
////////////////////////////////////////////////////////////////////////
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff