#include "AliTPCtrack.h"
#include "AliCluster.h"
-#include "AliBarrelTrack.h"
#include "AliESDtrack.h"
+#include "AliTPCReconstructor.h"
ClassImp(AliTPCtrack)
//_________________________________________________________________________
-AliTPCtrack::AliTPCtrack(): AliKalmanTrack()
+AliTPCtrack::AliTPCtrack():
+ AliKalmanTrack(),
+ fX(0),
+ fAlpha(0),
+ fdEdx(0),
+ fP0(0),
+ fP1(0),
+ fP2(0),
+ fP3(0),
+ fP4(0),
+ fC00(1e10),
+ fC10(0),
+ fC11(1e10),
+ fC20(0),
+ fC21(0),
+ fC22(1e10),
+ fC30(0),
+ fC31(0),
+ fC32(0),
+ fC33(1e10),
+ fC40(0),
+ fC41(0),
+ fC42(0),
+ fC43(0),
+ fC44(0),
+ fNumber(0),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(-1),
+ fFirstPoint(-1),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(-1),
+ fNShared(0),
+ fReference()
{
- fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0;
- fAlpha = fdEdx = 0.0;
- fNWrong = fNRotation = fNumber = 0; // [SR, 01.04.2003]
+ //-------------------------------------------------
+ // default constructor
+ //-------------------------------------------------
+ for (Int_t i=0; i<kMaxRow;i++) fIndex[i]=-2;
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
}
//_________________________________________________________________________
+
+
+
AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5],
-const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
+const Double_t cc[15], Double_t xref, Double_t alpha) :
+ AliKalmanTrack(),
+ fX(xref),
+ fdEdx(0),
+ fP0(xx[0]),
+ fP1(xx[1]),
+ fP2(xx[2]),
+ fP3(xx[3]),
+ fP4(xx[4]),
+ fC00(cc[0]),
+ fC10(cc[1]),
+ fC11(cc[2]),
+ fC20(cc[3]),
+ fC21(cc[4]),
+ fC22(cc[5]),
+ fC30(cc[6]),
+ fC31(cc[7]),
+ fC32(cc[8]),
+ fC33(cc[9]),
+ fC40(cc[10]),
+ fC41(cc[11]),
+ fC42(cc[12]),
+ fC43(cc[13]),
+ fC44(cc[14]),
+ fNumber(1),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(0),
+ fFirstPoint(0),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(0),
+ fNShared(0),
+ fReference()
+{
//-----------------------------------------------------------------
// This is the main track constructor.
//-----------------------------------------------------------------
- fX=xref;
fAlpha=alpha;
if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
- fdEdx=0.;
-
- fP0=xx[0]; fP1=xx[1]; fP2=xx[2]; fP3=xx[3]; fP4=xx[4];
- fC00=cc[0];
- fC10=cc[1]; fC11=cc[2];
- fC20=cc[3]; fC21=cc[4]; fC22=cc[5];
- fC30=cc[6]; fC31=cc[7]; fC32=cc[8]; fC33=cc[9];
- fC40=cc[10]; fC41=cc[11]; fC42=cc[12]; fC43=cc[13]; fC44=cc[14];
+ SaveLocalConvConst();
- fIndex[0]=index;
SetNumberOfClusters(1);
- //
- //MI
- fSdEdx = 0;
- fNFoundable = 0;
- fBConstrain = 0;
- fLastPoint = 0;
- fFirstPoint = 0;
- fRemoval = 0;
- fTrackType = 0;
- fLab2 = 0;
-}
-
-//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) :
-AliKalmanTrack(t) {
- //-----------------------------------------------------------------
- // Conversion AliKalmanTrack -> AliTPCtrack.
- //-----------------------------------------------------------------
- SetChi2(0.);
- SetNumberOfClusters(0);
-
- fdEdx = 0.;
- fAlpha = alpha;
- 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];
- //
- //MI
- fSdEdx = 0;
- fNFoundable = 0;
- fBConstrain = 0;
- fLastPoint = 0;
- fFirstPoint = 0;
- fRemoval = 0;
- fTrackType = 0;
- fLab2 = 0;
+ fIndex[0]=index;
+ for (Int_t i=1; i<kMaxRow;i++) fIndex[i]=-2;
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
}
//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliESDtrack& t) : AliKalmanTrack() {
+AliTPCtrack::AliTPCtrack(const AliESDtrack& t) :
+ AliKalmanTrack(),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(0),
+ fFirstPoint(0),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(0),
+ fNShared(0),
+ fReference()
+{
//-----------------------------------------------------------------
// Conversion AliESDtrack -> AliTPCtrack.
//-----------------------------------------------------------------
SetNumberOfClusters(t.GetTPCclusters(fIndex));
SetLabel(t.GetLabel());
SetMass(t.GetMass());
+ for (Int_t i=0; i<4;i++) fPoints[i]=0.;
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.;
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=0;
fdEdx = t.GetTPCsignal();
fAlpha = t.GetAlpha();
//Conversion of the track parameters
Double_t x,p[5]; t.GetExternalParameters(x,p);
- fX=x; x=GetConvConst();
+ Double_t c[15]; t.GetExternalCovariance(c);
+
+ fX=x;
fP0=p[0];
- fP1=p[1];
- fP3=p[3];
+ fP1=p[1]; SaveLocalConvConst();
+ fP3=p[3]; x=GetLocalConvConst();
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];
StartTimeIntegral();
Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
SetIntegratedLength(t.GetIntegratedLength());
- //
- //MI
- fSdEdx = 0;
- fNFoundable = 0;
- fBConstrain = 0;
- fLastPoint = 0;
- fFirstPoint = 0;
- fRemoval = 0;
- fTrackType = 0;
- fLab2 = 0;
}
//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) {
+AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) :
+ AliKalmanTrack(t),
+ fX(t.fX),
+ fAlpha(t.fAlpha),
+ fdEdx(t.fdEdx),
+ fP0(t.fP0),
+ fP1(t.fP1),
+ fP2(t.fP2),
+ fP3(t.fP3),
+ fP4(t.fP4),
+ fC00(t.fC00),
+ fC10(t.fC10),
+ fC11(t.fC11),
+ fC20(t.fC20),
+ fC21(t.fC21),
+ fC22(t.fC22),
+ fC30(t.fC30),
+ fC31(t.fC31),
+ fC32(t.fC32),
+ fC33(t.fC33),
+ fC40(t.fC40),
+ fC41(t.fC41),
+ fC42(t.fC42),
+ fC43(t.fC43),
+ fC44(t.fC44),
+ fNumber(t.fNumber),
+ fSdEdx(t.fSdEdx),
+ fNFoundable(t.fNFoundable),
+ fBConstrain(t.fBConstrain),
+ fLastPoint(t.fLastPoint),
+ fFirstPoint(t.fFirstPoint),
+ fRemoval(t.fRemoval),
+ fTrackType(t.fTrackType),
+ fLab2(t.fLab2),
+ fNShared(t.fNShared),
+ fReference(t.fReference)
+
+{
//-----------------------------------------------------------------
// This is a track copy constructor.
//-----------------------------------------------------------------
- fX=t.fX;
- fAlpha=t.fAlpha;
- fdEdx=t.fdEdx;
-
- fP0=t.fP0; fP1=t.fP1; fP2=t.fP2; fP3=t.fP3; fP4=t.fP4;
-
- fC00=t.fC00;
- fC10=t.fC10; fC11=t.fC11;
- fC20=t.fC20; fC21=t.fC21; fC22=t.fC22;
- fC30=t.fC30; fC31=t.fC31; fC32=t.fC32; fC33=t.fC33;
- fC40=t.fC40; fC41=t.fC41; fC42=t.fC42; fC43=t.fC43; fC44=t.fC44;
-
- //Int_t n=GetNumberOfClusters();
for (Int_t i=0; i<kMaxRow; i++) fIndex[i]=t.fIndex[i];
- //
- //MI
- fSdEdx = t.fSdEdx;
- fNFoundable = t.fNFoundable;
- fBConstrain = t.fBConstrain;
- fLastPoint = t.fLastPoint;
- fFirstPoint = t.fFirstPoint;
- fRemoval = t.fRemoval ;
- fTrackType = t.fTrackType;
- fLab2 = t.fLab2;
-
+ for (Int_t i=0; i<4;i++) fPoints[i]=t.fPoints[i];
+ for (Int_t i=0; i<12;i++) fKinkPoint[i]=t.fKinkPoint[i];
+ for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.fKinkIndexes[i];
+ for (Int_t i=0; i<3;i++) fV0Indexes[i]=t.fV0Indexes[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 {
//-----------------------------------------------------------------
//_____________________________________________________________________________
void AliTPCtrack::GetExternalCovariance(Double_t cc[15]) const {
- //-------------------------------------------------------------------------
+ //-------------------------------------------------------------------------
// This function returns an external representation of the covriance matrix.
// (See comments in AliTPCtrack.h about external track representation)
//-------------------------------------------------------------------------
- Double_t a=GetConvConst();
+ Double_t a=GetLocalConvConst();
Double_t c22=fX*fX*fC44-2*fX*fC42+fC22;
Double_t c32=fX*fC43-fC32;
//-----------------------------------------------------------------
// This function calculates the Y-coordinate of a track at the plane x=xk.
//-----------------------------------------------------------------
+ if (TMath::Abs(fP4*fX - fP2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
Double_t c1=fP4*fX - fP2, r1=TMath::Sqrt(1.- c1*c1);
- Double_t c2=fP4*xk - fP2, r2=TMath::Sqrt(1.- c2*c2);
+ Double_t c2=fP4*xk - fP2;
+ if (c2*c2>AliTPCReconstructor::GetMaxSnpTrack()) {
+ // Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<"AliTPCtrack::GetYat: can't evaluate the y-coord !\n";
+ return 0;
+ }
+ Double_t r2=TMath::Sqrt(1.- c2*c2);
return fP0 + (xk-fX)*(c1+c2)/(r1+r2);
}
//-----------------------------------------------------------------
// This function propagates a track to a reference plane x=xk.
//-----------------------------------------------------------------
- if (TMath::Abs(fP4*xk - fP2) >= 0.9) {
+ if (TMath::Abs(fP4*xk - fP2) >= AliTPCReconstructor::GetMaxSnpTrack()) {
// Int_t n=GetNumberOfClusters();
//if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
return 0;
}
-
+ Double_t lcc=GetLocalConvConst();
+
// old position for time [SR, GSI 17.02.2003]
Double_t oldX = fX;
Double_t oldY = fP0;
fX=x2;
- //Multiple scattering******************
+ //Change of the magnetic field *************
+ SaveLocalConvConst();
+ cc=fP4;
+ fP4*=lcc/GetLocalConvConst();
+ fP2+=fX*(fP4-cc);
+
+ //Multiple scattering ******************
Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fP0)*(y1-fP0)+(z1-fP1)*(z1-fP1));
Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
Double_t beta2=p2/(p2 + GetMass()*GetMass());
+ beta2 = TMath::Min(beta2,0.99999999999);
//Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
Double_t theta2=1.0259e-6*10*10/20/(beta2*p2)*d*rho;
Double_t ey=fP4*fX - fP2, ez=fP3;
Double_t xz=fP4*ez, zz1=ez*ez+1, xy=fP2+ey;
-
+
fC22 += (2*ey*ez*ez*fP2+1-ey*ey+ez*ez+fP2*fP2*ez*ez)*theta2;
fC32 += ez*zz1*xy*theta2;
fC33 += zz1*zz1*theta2;
fC42 += xz*ez*xy*theta2;
fC43 += xz*zz1*theta2;
fC44 += xz*xz*theta2;
-
- //Energy losses************************
+ /*
+ //
+ //MI coeficients
+ Double_t dc22 = (1-ey*ey+xz*xz*fX*fX)*theta2;
+ Double_t dc32 = (xz*fX*zz1)*theta2;
+ Double_t dc33 = (zz1*zz1)*theta2;
+ Double_t dc42 = (xz*fX*xz)*theta2;
+ Double_t dc43 = (zz1*xz)*theta2;
+ Double_t dc44 = (xz*xz)*theta2;
+ fC22 += dc22;
+ fC32 += dc32;
+ fC33 += dc33;
+ fC42 += dc42;
+ fC43 += dc43;
+ fC44 += dc44;
+ */
+ //Energy losses ************************
Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
if (x1 < x2) dE=-dE;
cc=fP4;
+
+ //Double_t E = sqrt(p2+GetMass()*GetMass());
+ //Double_t mifac = TMath::Sqrt(1.+dE*dE/p2+2*E*dE/p2)-1;
+ //Double_t belfac = E*dE/p2;
+ //
fP4*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
fP2+=fX*(fP4-cc);
// Integrated Time [SR, GSI, 17.02.2003]
- if (IsStartedTimeIntegral()) {
+ if (x1 < x2)
+ if (IsStartedTimeIntegral()) {
Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+(fP1-oldZ)*(fP1-oldZ);
AddTimeStep(TMath::Sqrt(l2));
}
//-----------------------------------------------------------------
// 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;
Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
Double_t cur=fP4 + k40*dy + k41*dz, eta=fP2 + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
+ if (TMath::Abs(cur*fX-eta) >= AliTPCReconstructor::GetMaxSnpTrack()) {
// Int_t n=GetNumberOfClusters();
//if (n>4) cerr<<n<<" AliTPCtrack warning: Filtering failed !\n";
return 0;
//-----------------------------------------------------------------
// 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 ca=cos(alpha), sa=sin(alpha);
Double_t r1=fP4*fX - fP2;
+ if (TMath::Abs(r1)>=AliTPCReconstructor::GetMaxSnpTrack()) return 0; //patch 01 jan 06
+
fX = x1*ca + y1*sa;
fP0=-x1*sa + y1*ca;
fP2=fP2*ca + (fP4*y1 + sqrt(1.- r1*r1))*sa;
Double_t r2=fP4*fX - fP2;
- if (TMath::Abs(r2) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !\n";
+ if (TMath::Abs(r2) >= AliTPCReconstructor::GetMaxSnpTrack()) {
+ //Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !\n";
return 0;
}
Double_t y0=fP0 + sqrt(1.- r2*r2)/fP4;
if ((fP0-y0)*fP4 >= 0.) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !!!\n";
+ //Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<" AliTPCtrack warning: Rotation failed !!!\n";
return 0;
}
delta -= TMath::Abs(r);
return delta;
}
+
+//
+//
+
+void AliTPCtrack::UpdatePoints()
+{
+ //--------------------------------------------------
+ //calculates first ,amx dens and last points
+ //--------------------------------------------------
+ Float_t density[160];
+ for (Int_t i=0;i<160;i++) density[i]=-1.;
+ fPoints[0]= 160;
+ fPoints[1] = -1;
+ //
+ Int_t ngood=0;
+ Int_t undeff=0;
+ Int_t nall =0;
+ Int_t range=20;
+ for (Int_t i=0;i<160;i++){
+ Int_t last = i-range;
+ if (nall<range) nall++;
+ if (last>=0){
+ if (fIndex[last]>0&& (fIndex[last]&0x8000)==0) ngood--;
+ if (fIndex[last]==-1) undeff--;
+ }
+ if (fIndex[i]>0&& (fIndex[i]&0x8000)==0) ngood++;
+ if (fIndex[i]==-1) undeff++;
+ if (nall==range &&undeff<range/2) density[i-range/2] = Float_t(ngood)/Float_t(nall-undeff);
+ }
+ Float_t maxdens=0;
+ Int_t indexmax =0;
+ for (Int_t i=0;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]>maxdens){
+ maxdens=density[i];
+ indexmax=i;
+ }
+ }
+ //
+ //max dens point
+ fPoints[3] = maxdens;
+ fPoints[1] = indexmax;
+ //
+ // last point
+ for (Int_t i=indexmax;i<160;i++){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[2]=i;
+ }
+ //
+ // first point
+ for (Int_t i=indexmax;i>0;i--){
+ if (density[i]<0) continue;
+ if (density[i]<maxdens/2.) {
+ break;
+ }
+ fPoints[0]=i;
+ }
+ //
+}
+
+Double_t AliTPCtrack::Get1Pt() const {
+ //--------------------------------------------------------------
+ // Returns the inverse Pt (1/GeV/c)
+ // (or 1/"most probable pt", if the field is too weak)
+ //--------------------------------------------------------------
+ if (TMath::Abs(GetLocalConvConst()) > kVeryBigConvConst)
+ return 1./kMostProbableMomentum/TMath::Sqrt(1.+ GetTgl()*GetTgl());
+ return (TMath::Sign(1e-9,fP4) + fP4)*GetLocalConvConst();
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff