#include "AliTPCtrack.h"
#include "AliCluster.h"
-#include "AliBarrelTrack.h"
+#include "AliTracker.h"
#include "AliESDtrack.h"
-
+#include "AliESDVertex.h"
+#include "TTreeStream.h"
+#include "AliTPCRecoParam.h"
+#include "AliTPCReconstructor.h"
ClassImp(AliTPCtrack)
//_________________________________________________________________________
-AliTPCtrack::AliTPCtrack(): AliKalmanTrack()
+AliTPCtrack::AliTPCtrack():
+ AliKalmanTrack(),
+ fdEdx(0),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(-1),
+ fFirstPoint(-1),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(-1),
+ fNShared(0),
+ fReference()
{
//-------------------------------------------------
// default constructor
//-------------------------------------------------
- fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0;
- fAlpha = fdEdx = 0.0;
- fNWrong = fNRotation = fNumber = 0; // [SR, 01.04.2003]
+ 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() {
+AliTPCtrack::AliTPCtrack(Double_t x, Double_t alpha, const Double_t p[5],
+ const Double_t cov[15], Int_t index) :
+ AliKalmanTrack(),
+ fdEdx(0),
+ 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];
+ Double_t cnv=1./(AliTracker::GetBz()*kB2C);
+
+ Double_t pp[5]={
+ p[0],
+ p[1],
+ x*p[4] - p[2],
+ p[3],
+ p[4]*cnv
+ };
+
+ Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[5];
+ Double_t c32 = x*cov[13] - cov[8];
+ Double_t c20 = x*cov[10] - cov[3],
+ c21 = x*cov[11] - cov[4], c42 = x*cov[14] - cov[12];
+
+ Double_t cc[15]={
+ cov[0 ],
+ cov[1 ], cov[2 ],
+ c20, c21, c22,
+ cov[6 ], cov[7 ], c32, cov[9 ],
+ cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv
+ };
+
+ Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
+ Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
+ Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
+ pp[4] = w0*p0 + w1*pp[4];
+ cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
+
+ Set(x,alpha,pp,cc);
- fIndex[0]=index;
SetNumberOfClusters(1);
- //
- //MI
- fSdEdx = 0;
- fNFoundable = 0;
- fBConstrain = 0;
- fLastPoint = 0;
- fFirstPoint = 0;
- fRemoval = 0;
- fTrackType = 0;
- fLab2 = 0;
- for (Int_t i=0; i<3;i++) fKinkIndexes[i]=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, TTreeSRedirector *pcstream) :
+ AliKalmanTrack(),
+ fdEdx(t.GetTPCsignal()),
+ fSdEdx(1e10),
+ fNFoundable(0),
+ fBConstrain(kFALSE),
+ fLastPoint(0),
+ fFirstPoint(0),
+ fRemoval(0),
+ fTrackType(0),
+ fLab2(0),
+ fNShared(0),
+ fReference()
+{
//-----------------------------------------------------------------
// Conversion AliESDtrack -> AliTPCtrack.
//-----------------------------------------------------------------
+ const Double_t kmaxC[4]={10,10,0.1,0.1}; // cuts on the rms /fP0,fP1,fP2,fP3
SetNumberOfClusters(t.GetTPCclusters(fIndex));
SetLabel(t.GetLabel());
SetMass(t.GetMass());
- for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.GetKinkIndex(i);
-
- 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);
- Double_t c[15]; t.GetExternalCovariance(c);
-
- 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
- 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];
+ 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;
+ //
+ // choose parameters to start
+ //
+ const AliTPCRecoParam * recoParam = AliTPCReconstructor::GetRecoParam();
+ Int_t reject=0;
+ AliExternalTrackParam param(t);
+
+ const AliExternalTrackParam *tpcout=(t.GetFriendTrack())? ((AliESDfriendTrack*)(t.GetFriendTrack()))->GetTPCOut():0;
+ const AliExternalTrackParam *tpcin = t.GetInnerParam();
+ const AliExternalTrackParam *tpc=(tpcout)?tpcout:tpcin;
+ if (!tpc) tpc=¶m;
+ Bool_t isOK=recoParam->GetUseOuterDetectors();
+ if (param.GetCovariance()[0]>kmaxC[0]*kmaxC[0]) isOK=kFALSE;
+ if (param.GetCovariance()[2]>kmaxC[1]*kmaxC[1]) isOK=kFALSE;
+ if (param.GetCovariance()[5]>kmaxC[2]*kmaxC[2]) isOK=kFALSE;
+ if (param.GetCovariance()[9]>kmaxC[3]*kmaxC[3]) isOK=kFALSE;
+ param.Rotate(tpc->GetAlpha());
+ Double_t oldX=param.GetX(), oldY=param.GetY(), oldZ=param.GetZ();
+ if (!isOK ){
+ param=*tpc;
+ isOK=kTRUE;
+ reject=1;
+ }
+ isOK=AliTracker::PropagateTrackToBxByBz(¶m,tpc->GetX(),t.GetMass(),2.,kFALSE);
+ if (param.GetCovariance()[0]>kmaxC[0]*kmaxC[0]) isOK=kFALSE;
+ if (param.GetCovariance()[2]>kmaxC[1]*kmaxC[1]) isOK=kFALSE;
+ if (param.GetCovariance()[5]>kmaxC[2]*kmaxC[2]) isOK=kFALSE;
+ if (param.GetCovariance()[9]>kmaxC[3]*kmaxC[3]) isOK=kFALSE;
+ if (!isOK){
+ param=*tpc;
+ isOK=kTRUE;
+ reject=2;
+ }
+ if (reject>0){
+ param.ResetCovariance(4.); // reset covariance if start from backup param
+ }
+ //
+ //
+ if (pcstream){
+ AliExternalTrackParam dummy;
+ AliExternalTrackParam *ptpc=(AliExternalTrackParam *)tpc;
+ if (!ptpc) ptpc=&dummy;
+ AliESDtrack *esd= (AliESDtrack *)&t;
+ (*pcstream)<<"trackP"<<
+ "reject="<<reject<< // flag - rejection of current esd track parameters
+ "esd.="<<esd<< // original esd track
+ "tr.="<<¶m<< // starting track parameters
+ "out.="<<ptpc<< // backup tpc parameters
+ "\n";
+ }
- 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];
+ Set(param.GetX(),param.GetAlpha(),param.GetParameter(),param.GetCovariance());
if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
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;
- // SetFakeRatio(t.GetTPCFakeRatio());
+
+ if (GetX()>oldX) {
+ Double_t dX=GetX()-oldX, dY=GetY()-oldY, dZ=GetZ()-oldZ;
+ Double_t d=TMath::Sqrt(dX*dX + dY*dY + dZ*dZ);
+ AddTimeStep(d);
+ }
}
//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) {
+AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) :
+ AliKalmanTrack(t),
+ fdEdx(t.fdEdx),
+ 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;
+ Set(t.GetX(),t.GetAlpha(),t.GetParameter(),t.GetCovariance());
- 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) const{
- //
- // 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());
+AliTPCtrack& AliTPCtrack::operator=(const AliTPCtrack& o){
+ if(this!=&o){
+ AliKalmanTrack::operator=(o);
+ fdEdx = o.fdEdx;
+ for(Int_t i = 0;i<kMaxRow;++i)fIndex[i] = o.fIndex[i];
+ for(Int_t i = 0;i<4;++i)fPoints[i] = o.fPoints[i];
+ fSdEdx = o.fSdEdx;
+ fNFoundable = o.fNFoundable;
+ fBConstrain = o.fBConstrain;
+ fLastPoint = o.fLastPoint;
+ fFirstPoint = o.fFirstPoint;
+ fTrackType = o.fTrackType;
+ fLab2 = o.fLab2;
+ fNShared = o.fNShared;
+ fReference = o.fReference;
+ for(Int_t i = 0;i<12;++i) fKinkPoint[i] = o.fKinkPoint[i];
+
+ for(Int_t i = 0;i<3;++i){
+ fKinkIndexes[i] = o.fKinkIndexes[i];
+ fV0Indexes[i] = o.fV0Indexes[i];
+ }
+ }
+ return *this;
- 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 {
//-----------------------------------------------------------------
// This function compares tracks according to the their curvature
//-----------------------------------------------------------------
AliTPCtrack *t=(AliTPCtrack*)o;
- //Double_t co=TMath::Abs(t->Get1Pt());
- //Double_t c =TMath::Abs(Get1Pt());
+ //Double_t co=t->OneOverPt();
+ //Double_t c = OneOverPt();
Double_t co=t->GetSigmaY2()*t->GetSigmaZ2();
Double_t c =GetSigmaY2()*GetSigmaZ2();
if (c>co) return 1;
return 0;
}
-//_____________________________________________________________________________
-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 c22=fX*fX*fC44-2*fX*fC42+fC22;
- Double_t c32=fX*fC43-fC32;
- Double_t c20=fX*fC40-fC20, c21=fX*fC41-fC21, c42=fX*fC44-fC42;
-
- cc[0 ]=fC00;
- cc[1 ]=fC10; cc[2 ]=fC11;
- cc[3 ]=c20; cc[4 ]=c21; cc[5 ]=c22;
- cc[6 ]=fC30; cc[7 ]=fC31; cc[8 ]=c32; cc[9 ]=fC33;
- cc[10]=fC40*a; cc[11]=fC41*a; cc[12]=c42*a; cc[13]=fC43*a; cc[14]=fC44*a*a;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const
-{
+Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const {
//-----------------------------------------------------------------
// This function calculates a predicted chi2 increment.
//-----------------------------------------------------------------
- Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
- r00+=fC00; r01+=fC10; r11+=fC11;
-
- Double_t det=r00*r11 - r01*r01;
- if (TMath::Abs(det) < 1.e-10) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliKalmanTrack warning: Singular matrix !\n";
- return 1e10;
- }
- Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
-
- Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
-
- 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;
- if (c2*c2>0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<"AliTPCtrack::GetYat: can't evaluate the y-coord !\n";
- return 1e10;
- }
- Double_t r2=TMath::Sqrt(1.- c2*c2);
- return fP0 + (xk-fX)*(c1+c2)/(r1+r2);
+ Double_t p[2]={c->GetY(), c->GetZ()};
+ Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()};
+ return AliExternalTrackParam::GetPredictedChi2(p,cov);
}
//_____________________________________________________________________________
-Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t /*x0*/,Double_t rho) {
+Bool_t AliTPCtrack::PropagateTo(Double_t xk,Double_t rho,Double_t x0) {
//-----------------------------------------------------------------
- // This function propagates a track to a reference plane x=xk.
+ // This function propagates a track to a reference plane x=xk.
+ // rho - density of the crossed matrial (g/cm^3)
+ // x0 - radiation length of the crossed material (g/cm^2)
//-----------------------------------------------------------------
- if (TMath::Abs(fP4*xk - fP2) >= 0.9) {
- // Int_t n=GetNumberOfClusters();
- //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);
- Double_t c2=fP4*x2 - fP2, r2=sqrt(1.- c2*c2);
-
- fP0 += dx*(c1+c2)/(r1+r2);
- fP1 += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
-
- //f = F - 1
- Double_t rr=r1+r2, cc=c1+c2, xx=x1+x2;
- Double_t f02=-dx*(2*rr + cc*(c1/r1 + c2/r2))/(rr*rr);
- Double_t f04= dx*(rr*xx + cc*(c1*x1/r1+c2*x2/r2))/(rr*rr);
- Double_t cr=c1*r2+c2*r1;
- Double_t f12=-dx*fP3*(2*cr + cc*(c2*c1/r1-r1 + c1*c2/r2-r2))/(cr*cr);
- Double_t f13= dx*cc/cr;
- Double_t f14=dx*fP3*(cr*xx-cc*(r1*x2-c2*c1*x1/r1+r2*x1-c1*c2*x2/r2))/(cr*cr);
-
- //b = C*ft
- Double_t b00=f02*fC20 + f04*fC40, b01=f12*fC20 + f14*fC40 + f13*fC30;
- Double_t b10=f02*fC21 + f04*fC41, b11=f12*fC21 + f14*fC41 + f13*fC31;
- Double_t b20=f02*fC22 + f04*fC42, b21=f12*fC22 + f14*fC42 + f13*fC32;
- Double_t b30=f02*fC32 + f04*fC43, b31=f12*fC32 + f14*fC43 + f13*fC33;
- Double_t b40=f02*fC42 + f04*fC44, b41=f12*fC42 + f14*fC44 + f13*fC43;
-
- //a = f*b = f*C*ft
- Double_t a00=f02*b20+f04*b40,a01=f02*b21+f04*b41,a11=f12*b21+f14*b41+f13*b31;
-
- //F*C*Ft = C + (a + b + bt)
- fC00 += a00 + 2*b00;
- fC10 += a01 + b01 + b10;
- fC20 += b20;
- fC30 += b30;
- fC40 += b40;
- fC11 += a11 + 2*b11;
- fC21 += b21;
- fC31 += b31;
- fC41 += b41;
-
- fX=x2;
-
- //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;
- /*
//
- //MI coeficints
- 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 (x1 < x2)
- if (IsStartedTimeIntegral()) {
- Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+(fP1-oldZ)*(fP1-oldZ);
- AddTimeStep(TMath::Sqrt(l2));
+ Double_t bz=GetBz();
+ Double_t zat=0;
+ if (!GetZAt(xk, bz,zat)) return kFALSE;
+ if (TMath::Abs(zat)>250.){
+ // Don't propagate track outside of the fiducial volume - material budget not proper one
+ //
+ //AliWarning("Propagate outside of fiducial volume");
+ return kFALSE;
}
- //
- return 1;
+ Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
+ //if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE;
+ Double_t b[3]; GetBxByBz(b);
+ if (!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
+
+ Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) +
+ (GetY()-oldY)*(GetY()-oldY) +
+ (GetZ()-oldZ)*(GetZ()-oldZ));
+ if (IsStartedTimeIntegral() && GetX()>oldX) AddTimeStep(d);
+
+ if (oldX < xk) d = -d;
+ if (!AliExternalTrackParam::CorrectForMeanMaterial(d*rho/x0,d*rho,GetMass(),
+ kFALSE,AliExternalTrackParam::BetheBlochGas)) return kFALSE;
+
+ return kTRUE;
}
//_____________________________________________________________________________
-Int_t AliTPCtrack::PropagateToVertex(Double_t x0,Double_t rho)
+Bool_t
+AliTPCtrack::PropagateToVertex(const AliESDVertex *v,Double_t rho,Double_t x0)
{
//-----------------------------------------------------------------
- // This function propagates tracks to the "vertex".
+ // This function propagates tracks to the vertex
+ // rho - density of the crossed matrial (g/cm3)
+ // x0 - radiation length of the crossed material (g/cm2)
//-----------------------------------------------------------------
- Double_t c=fP4*fX - fP2;
- Double_t tgf=-fP2/(fP4*fP0 + sqrt(1-c*c));
- Double_t snf=tgf/sqrt(1.+ tgf*tgf);
- Double_t xv=(fP2+snf)/fP4;
- return PropagateTo(xv,x0,rho);
+ Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
+
+ //Double_t bz=GetBz();
+ //if (!PropagateToDCA(v,bz,kVeryBig)) return kFALSE;
+ Double_t b[3]; GetBxByBz(b);
+ if (!PropagateToDCABxByBz(v,b,kVeryBig)) return kFALSE;
+
+ Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) +
+ (GetY()-oldY)*(GetY()-oldY) +
+ (GetZ()-oldZ)*(GetZ()-oldZ));
+
+ if (oldX < GetX()) d = -d;
+ if (!AliExternalTrackParam::CorrectForMeanMaterial(d*rho/x0,d*rho,GetMass(),
+ kFALSE,AliExternalTrackParam::BetheBlochGas)) return kFALSE;
+
+ return kTRUE;
}
//_____________________________________________________________________________
-Int_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, UInt_t index) {
+Bool_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, Int_t index) {
//-----------------------------------------------------------------
// This function associates a cluster with this track.
//-----------------------------------------------------------------
+ Double_t p[2]={c->GetY(), c->GetZ()};
+ Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()};
- // 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++;
- //
+ if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
- 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 tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
-
- Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11;
- Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11;
- Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11;
- Double_t k30=fC30*r00+fC31*r01, k31=fC30*r01+fC31*r11;
- Double_t k40=fC40*r00+fC41*r01, k41=fC40*r01+fC41*r11;
-
- 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) {
- // Int_t n=GetNumberOfClusters();
- //if (n>4) cerr<<n<<" AliTPCtrack warning: Filtering failed !\n";
- return 0;
- }
-
- fP0 += k00*dy + k01*dz;
- fP1 += k10*dy + k11*dz;
- fP2 = eta;
- fP3 += k30*dy + k31*dz;
- fP4 = cur;
-
- Double_t c01=fC10, c02=fC20, c03=fC30, c04=fC40;
- Double_t c12=fC21, c13=fC31, c14=fC41;
-
- fC00-=k00*fC00+k01*fC10; fC10-=k00*c01+k01*fC11;
- fC20-=k00*c02+k01*c12; fC30-=k00*c03+k01*c13;
- fC40-=k00*c04+k01*c14;
-
- fC11-=k10*c01+k11*fC11;
- fC21-=k10*c02+k11*c12; fC31-=k10*c03+k11*c13;
- fC41-=k10*c04+k11*c14;
-
- fC22-=k20*c02+k21*c12; fC32-=k20*c03+k21*c13;
- fC42-=k20*c04+k21*c14;
-
- fC33-=k30*c03+k31*c13;
- fC43-=k40*c03+k41*c13;
-
- fC44-=k40*c04+k41*c14;
+ AliTracker::FillResiduals(this,p,cov,c->GetVolumeId());
Int_t n=GetNumberOfClusters();
fIndex[n]=index;
SetNumberOfClusters(n+1);
SetChi2(GetChi2()+chisq);
- return 1;
+ return kTRUE;
}
-//_____________________________________________________________________________
-Int_t AliTPCtrack::Rotate(Double_t alpha)
-{
- //-----------------------------------------------------------------
- // 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 x1=fX, y1=fP0;
- Double_t ca=cos(alpha), sa=sin(alpha);
- Double_t r1=fP4*fX - fP2;
-
- 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";
- 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";
- return 0;
- }
-
- //f = F - 1
- Double_t f00=ca-1, f24=(y1 - r1*x1/sqrt(1.- r1*r1))*sa,
- f20=fP4*sa, f22=(ca + sa*r1/sqrt(1.- r1*r1))-1;
-
- //b = C*ft
- Double_t b00=fC00*f00, b02=fC00*f20+fC40*f24+fC20*f22;
- Double_t b10=fC10*f00, b12=fC10*f20+fC41*f24+fC21*f22;
- Double_t b20=fC20*f00, b22=fC20*f20+fC42*f24+fC22*f22;
- Double_t b30=fC30*f00, b32=fC30*f20+fC43*f24+fC32*f22;
- Double_t b40=fC40*f00, b42=fC40*f20+fC44*f24+fC42*f22;
-
- //a = f*b = f*C*ft
- Double_t a00=f00*b00, a02=f00*b02, a22=f20*b02+f24*b42+f22*b22;
-
- // *** Double_t dy2=fCyy;
-
- //F*C*Ft = C + (a + b + bt)
- fC00 += a00 + 2*b00;
- fC10 += b10;
- fC20 += a02+b20+b02;
- fC30 += b30;
- fC40 += b40;
- fC21 += b12;
- fC32 += b32;
- fC22 += a22 + 2*b22;
- fC42 += b42;
-
- // *** fCyy+=dy2*sa*sa*r1*r1/(1.- r1*r1);
- // *** fCzz+=d2y*sa*sa*fT*fT/(1.- r1*r1);
-
- return 1;
-}
-
-void AliTPCtrack::ResetCovariance() {
- //------------------------------------------------------------------
- //This function makes a track forget its history :)
- //------------------------------------------------------------------
-
- fC00*=10.;
- fC10=0.; fC11*=10.;
- fC20=0.; fC21=0.; fC22*=10.;
- fC30=0.; fC31=0.; fC32=0.; fC33*=10.;
- fC40=0.; fC41=0.; fC42=0.; fC43=0.; fC44*=10.;
-
-}
-
-////////////////////////////////////////////////////////////////////////
-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();
- return phi;
-}
-////////////////////////////////////////////////////////////////////////
-
-
-
////////////////////////////////////////////////////////////////////////
// MI ADDITION
return density;
}
-
-Double_t AliTPCtrack::GetZat0() const
-{
- //
- // return virtual z - supposing that x = 0
- if (TMath::Abs(fP2)>1) return 0;
- if (TMath::Abs(fX*fP4-fP2)>1) return 0;
- Double_t vz = fP1+fP3/fP4*(asin(-fP2)-asin(fX*fP4-fP2));
- return vz;
-}
-
-
-Double_t AliTPCtrack::GetD(Double_t x, Double_t y) const {
- //------------------------------------------------------------------
- // This function calculates the transverse impact parameter
- // with respect to a point with global coordinates (x,y)
- //------------------------------------------------------------------
- //Double_t xt=fX, yt=fP0;
-
- Double_t sn=TMath::Sin(fAlpha), cs=TMath::Cos(fAlpha);
- Double_t a = x*cs + y*sn;
- y = -x*sn + y*cs; x=a;
- //
- Double_t r = TMath::Abs(1/fP4);
- Double_t x0 = TMath::Abs(fP2*r);
- Double_t y0 = fP0;
- y0= fP0+TMath::Sqrt(1-(fP4*fX-fP2)*(fP4*fX-fP2))/fP4;
-
- Double_t delta = TMath::Sqrt((x-x0)*(x-x0)+(y-y0)*(y-y0));
- // Double_t delta = TMath::Sqrt(TMath::Abs(x*x-2*x0*x+x0*x0+ y*y-2*y*y0+y0*y0));
- delta -= TMath::Abs(r);
- return delta;
-}
-
-//
-//
-
void AliTPCtrack::UpdatePoints()
{
//--------------------------------------------------
}
//
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff