* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.10 2002/06/12 09:54:35 cblume
-Update of tracking code provided by Sergei
+/* $Id$ */
-Revision 1.8 2001/05/30 12:17:47 hristov
-Loop variables declared once
-
-Revision 1.7 2001/05/28 17:07:58 hristov
-Last minute changes; ExB correction in AliTRDclusterizerV1; taking into account of material in G10 TEC frames and material between TEC planes (C.Blume,S.Sedykh)
-
-Revision 1.4 2000/12/08 16:07:02 cblume
-Update of the tracking by Sergei
-
-Revision 1.3 2000/10/15 23:40:01 cblume
-Remove AliTRDconst
-
-Revision 1.2 2000/10/06 16:49:46 cblume
-Made Getters const
-
-Revision 1.1.2.1 2000/09/22 14:47:52 cblume
-Add the tracking code
-
-*/
-
-#include <iostream.h>
+#include <Riostream.h>
#include <TObject.h>
#include "AliTRDgeometry.h"
#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
#include "../TPC/AliTPCtrack.h"
+#include "AliESDtrack.h"
+#include "AliTRDclusterCorrection.h"
ClassImp(AliTRDtrack)
-
//_____________________________________________________________________________
AliTRDtrack::AliTRDtrack(const AliTRDcluster *c, UInt_t index,
fX=xref;
- fY=xx[0]; fZ=xx[1]; fC=xx[2]; fE=xx[3]; fT=xx[4];
+ fY=xx[0]; fZ=xx[1]; fE=xx[2]; fT=xx[3]; fC=xx[4];
fCyy=cc[0];
fCzy=cc[1]; fCzz=cc[2];
- fCcy=cc[3]; fCcz=cc[4]; fCcc=cc[5];
- fCey=cc[6]; fCez=cc[7]; fCec=cc[8]; fCee=cc[9];
- fCty=cc[10]; fCtz=cc[11]; fCtc=cc[12]; fCte=cc[13]; fCtt=cc[14];
-
+ fCey=cc[3]; fCez=cc[4]; fCee=cc[5];
+ fCty=cc[6]; fCtz=cc[7]; fCte=cc[8]; fCtt=cc[9];
+ fCcy=cc[10]; fCcz=cc[11]; fCce=cc[12]; fCct=cc[13]; fCcc=cc[14];
+
fIndex[0]=index;
SetNumberOfClusters(1);
fdEdx=0.;
+ fLhElectron = 0.0;
+ fNWrong = 0;
+ fNRotate = 0;
+ fStopped = 0;
Double_t q = TMath::Abs(c->GetQ());
Double_t s = fX*fC - fE, t=fT;
if(s*s < 1) q *= TMath::Sqrt((1-s*s)/(1+t*t));
fdQdl[0] = q;
+
+ // initialisation [SR, GSI 18.02.2003] (i startd for 1)
+ for(UInt_t i=1; i<kMAX_CLUSTERS_PER_TRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; //bacup indexes MI
+ }
}
//_____________________________________________________________________________
//
// Copy constructor.
//
-
+
SetLabel(t.GetLabel());
fSeedLab=t.GetSeedLabel();
SetChi2(t.GetChi2());
fdEdx=t.fdEdx;
+ fLhElectron = 0.0;
+ fNWrong = t.fNWrong;
+ fNRotate = t.fNRotate;
+ fStopped = t.fStopped;
fAlpha=t.fAlpha;
fX=t.fX;
- fY=t.fY; fZ=t.fZ; fC=t.fC; fE=t.fE; fT=t.fT;
+ fY=t.fY; fZ=t.fZ; fE=t.fE; fT=t.fT; fC=t.fC;
fCyy=t.fCyy;
fCzy=t.fCzy; fCzz=t.fCzz;
- fCcy=t.fCcy; fCcz=t.fCcz; fCcc=t.fCcc;
- fCey=t.fCey; fCez=t.fCez; fCec=t.fCec; fCee=t.fCee;
- fCty=t.fCty; fCtz=t.fCtz; fCtc=t.fCtc; fCte=t.fCte; fCtt=t.fCtt;
+ fCey=t.fCey; fCez=t.fCez; fCee=t.fCee;
+ fCty=t.fCty; fCtz=t.fCtz; fCte=t.fCte; fCtt=t.fCtt;
+ fCcy=t.fCcy; fCcz=t.fCcz; fCce=t.fCce; fCct=t.fCct; fCcc=t.fCcc;
Int_t n=t.GetNumberOfClusters();
SetNumberOfClusters(n);
for (Int_t i=0; i<n; i++) {
fIndex[i]=t.fIndex[i];
+ fIndexBackup[i]=t.fIndex[i]; // MI - backup indexes
fdQdl[i]=t.fdQdl[i];
}
+
+ // initialisation (i starts from n) [SR, GSI, 18.02.2003]
+ for(UInt_t i=n; i<kMAX_CLUSTERS_PER_TRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; //MI backup indexes
+ }
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliKalmanTrack& t, Double_t alpha) {
+AliTRDtrack::AliTRDtrack(const AliKalmanTrack& t, Double_t alpha)
+ :AliKalmanTrack(t) {
//
// Constructor from AliTPCtrack or AliITStrack .
//
SetLabel(t.GetLabel());
SetChi2(0.);
+ SetMass(t.GetMass());
SetNumberOfClusters(0);
fdEdx=0;
+ fLhElectron = 0.0;
+ fNWrong = 0;
+ fNRotate = 0;
+ fStopped = 0;
+
fAlpha = alpha;
if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
x = GetConvConst();
- fY=p[0]; fZ=p[1]; fC=p[4]/x;
- fE=fX*fC-p[2]; fT=p[3];
+ fY=p[0];
+ fZ=p[1];
+ fT=p[3];
+ fC=p[4]/x;
+ fE=fC*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];
+
+ fCyy=c[0 ];
+ fCzy=c[1 ]; fCzz=c[2 ];
+ fCey=c20; fCez=c21; fCee=c22;
+ fCty=c[6 ]; fCtz=c[7 ]; fCte=c32; fCtt=c[9 ];
+ fCcy=c[10]; fCcz=c[11]; fCce=c42; fCct=c[13]; fCcc=c[14];
+
+ // Initialization [SR, GSI, 18.02.2003]
+ for(UInt_t i=0; i<kMAX_CLUSTERS_PER_TRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; // MI backup indexes
+ }
+}
+//_____________________________________________________________________________
+AliTRDtrack::AliTRDtrack(const AliESDtrack& t)
+ :AliKalmanTrack() {
+ //
+ // Constructor from AliESDtrack
+ //
+
+ SetLabel(t.GetLabel());
+ SetChi2(0.);
+ SetMass(t.GetMass());
+ SetNumberOfClusters(t.GetTRDclusters(fIndex));
+ Int_t ncl = t.GetTRDclusters(fIndexBackup);
+ for (UInt_t i=ncl;i<kMAX_CLUSTERS_PER_TRACK;i++) {
+ fIndexBackup[i]=0;
+ fIndex[i] = 0; //MI store indexes
+ }
+ fdEdx=0;
+
+ fLhElectron = 0.0;
+ fNWrong = 0;
+ fStopped = 0;
+ fNRotate = 0;
+
+ fAlpha = t.GetAlpha();
+ if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi();
+ else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi();
+
+ Double_t x, p[5]; t.GetExternalParameters(x,p);
+
+ fX=x;
+
+ x = GetConvConst();
+
+ fY=p[0];
+ fZ=p[1];
+ fT=p[3];
+ fC=p[4]/x;
+ fE=fC*fX - p[2];
//Conversion of the covariance matrix
Double_t c[15]; t.GetExternalCovariance(c);
fCyy=c[0 ];
fCzy=c[1 ]; fCzz=c[2 ];
- fCcy=c[10]; fCcz=c[11]; fCcc=c[14];
- fCey=c20; fCez=c21; fCec=c42; fCee=c22;
- fCty=c[6 ]; fCtz=c[7 ]; fCtc=c[13]; fCte=c32; fCtt=c[9 ];
+ fCey=c20; fCez=c21; fCee=c22;
+ fCty=c[6 ]; fCtz=c[7 ]; fCte=c32; fCtt=c[9 ];
+ fCcy=c[10]; fCcz=c[11]; fCce=c42; fCct=c[13]; fCcc=c[14];
+
+ // Initialization [SR, GSI, 18.02.2003]
+ for(UInt_t i=0; i<kMAX_CLUSTERS_PER_TRACK; i++) {
+ fdQdl[i] = 0;
+ // fIndex[i] = 0; //MI store indexes
+ }
+
+ if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
+ StartTimeIntegral();
+ Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
+ SetIntegratedLength(t.GetIntegratedLength());
}
+//_____________________________________________________________________________
+void AliTRDtrack::GetBarrelTrack(AliBarrelTrack *track) {
+ //
+ //
+ //
+
+ if (!track) return;
+ Double_t xr, vec[5], cov[15];
+
+ track->SetLabel(GetLabel());
+ track->SetX(fX, fAlpha);
+ track->SetNClusters(GetNumberOfClusters(), GetChi2());
+ track->SetNWrongClusters(fNWrong);
+ track->SetNRotate(fNRotate);
+ Double_t times[10];
+ GetIntegratedTimes(times);
+ track->SetTime(times, GetIntegratedLength());
+
+ track->SetMass(GetMass());
+ track->SetdEdX(GetdEdx());
+
+ GetExternalParameters(xr, vec);
+ track->SetStateVector(vec);
+
+ GetExternalCovariance(cov);
+ track->SetCovarianceMatrix(cov);
+}
//____________________________________________________________________________
void AliTRDtrack::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
//
x[1]=GetZ();
x[2]=GetSnp();
x[3]=GetTgl();
- x[4]=fC*GetConvConst();
+ x[4]=Get1Pt();
}
//_____________________________________________________________________________
//
Double_t a=GetConvConst();
- Double_t c22=fX*fX*fCcc-2*fX*fCec+fCee;
- Double_t c32=fX*fCtc-fCte;
- Double_t c20=fX*fCcy-fCey, c21=fX*fCcz-fCez, c42=fX*fCcc-fCec;
+ Double_t c22=fX*fX*fCcc-2*fX*fCce+fCee;
+ Double_t c32=fX*fCct-fCte;
+ Double_t c20=fX*fCcy-fCey, c21=fX*fCcz-fCez, c42=fX*fCcc-fCce;
cc[0 ]=fCyy;
cc[1 ]=fCzy; cc[2 ]=fCzz;
cc[3 ]=c20; cc[4 ]=c21; cc[5 ]=c22;
cc[6 ]=fCty; cc[7 ]=fCtz; cc[8 ]=c32; cc[9 ]=fCtt;
- cc[10]=fCcy*a; cc[11]=fCcz*a; cc[12]=c42*a; cc[13]=fCtc*a; cc[14]=fCcc*a*a;
+ cc[10]=fCcy*a; cc[11]=fCcz*a; cc[12]=c42*a; cc[13]=fCct*a; cc[14]=fCcc*a*a;
+
}
//_____________________________________________________________________________
void AliTRDtrack::GetCovariance(Double_t cc[15]) const {
+
cc[0]=fCyy;
cc[1]=fCzy; cc[2]=fCzz;
- cc[3]=fCcy; cc[4]=fCcz; cc[5]=fCcc;
- cc[6]=fCey; cc[7]=fCez; cc[8]=fCec; cc[9]=fCee;
- cc[10]=fCty; cc[11]=fCtz; cc[12]=fCtc; cc[13]=fCte; cc[14]=fCtt;
+ cc[3]=fCey; cc[4]=fCez; cc[5]=fCee;
+ cc[6]=fCcy; cc[7]=fCcz; cc[8]=fCce; cc[9]=fCcc;
+ cc[10]=fCty; cc[11]=fCtz; cc[12]=fCte; cc[13]=fCct; cc[14]=fCtt;
+
}
//_____________________________________________________________________________
}
-
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho,Double_t pm)
+Int_t AliTRDtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho)
{
// Propagates a track of particle with mass=pm to a reference plane
// defined by x=xk through media of density=rho and radiationLength=x0
-
- if (TMath::Abs(fC*xk - fE) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTRDtrack warning: Propagation failed !\n";
+ if (xk == fX) return 1;
+
+ if (TMath::Abs(fC*xk - fE) >= 0.90000) {
+ // Int_t n=GetNumberOfClusters();
+ //if (n>4) cerr << n << " AliTRDtrack: Propagation failed, \tPt = "
+ // << GetPt() << "\t" << GetLabel() << "\t" << GetMass() << endl;
return 0;
}
+ // track Length measurement [SR, GSI, 17.02.2003]
+ Double_t oldX = fX, oldY = fY, oldZ = fZ;
+
Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=fY, z1=fZ;
Double_t c1=fC*x1 - fE;
if((c1*c1) > 1) return 0;
Double_t r1=sqrt(1.- c1*c1);
- Double_t c2=fC*x2 - fE;
+ Double_t c2=fC*x2 - fE;
if((c2*c2) > 1) return 0;
Double_t r2=sqrt(1.- c2*c2);
//f = F - 1
Double_t rr=r1+r2, cc=c1+c2, xx=x1+x2;
- Double_t f02= dx*(rr*xx + cc*(c1*x1/r1+c2*x2/r2))/(rr*rr);
- Double_t f03=-dx*(2*rr + cc*(c1/r1 + c2/r2))/(rr*rr);
+ 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*fT*(cr*xx-cc*(r1*x2-c2*c1*x1/r1+r2*x1-c1*c2*x2/r2))/(cr*cr);
- Double_t f13=-dx*fT*(2*cr + cc*(c2*c1/r1-r1 + c1*c2/r2-r2))/(cr*cr);
- Double_t f14= dx*cc/cr;
+ Double_t f12=-dx*fT*(2*cr + cc*(c2*c1/r1-r1 + c1*c2/r2-r2))/(cr*cr);
+ Double_t f13= dx*cc/cr;
+ Double_t f14=dx*fT*(cr*xx-cc*(r1*x2-c2*c1*x1/r1+r2*x1-c1*c2*x2/r2))/(cr*cr);
//b = C*ft
- Double_t b00=f02*fCcy + f03*fCey, b01=f12*fCcy + f13*fCey + f14*fCty;
- Double_t b10=f02*fCcz + f03*fCez, b11=f12*fCcz + f13*fCez + f14*fCtz;
- Double_t b20=f02*fCcc + f03*fCec, b21=f12*fCcc + f13*fCec + f14*fCtc;
- Double_t b30=f02*fCec + f03*fCee, b31=f12*fCec + f13*fCee + f14*fCte;
- Double_t b40=f02*fCtc + f03*fCte, b41=f12*fCtc + f13*fCte + f14*fCtt;
+ Double_t b00=f02*fCey + f04*fCcy, b01=f12*fCey + f14*fCcy + f13*fCty;
+ Double_t b10=f02*fCez + f04*fCcz, b11=f12*fCez + f14*fCcz + f13*fCtz;
+ Double_t b20=f02*fCee + f04*fCce, b21=f12*fCee + f14*fCce + f13*fCte;
+ Double_t b30=f02*fCte + f04*fCct, b31=f12*fCte + f14*fCct + f13*fCtt;
+ Double_t b40=f02*fCce + f04*fCcc, b41=f12*fCce + f14*fCcc + f13*fCct;
//a = f*b = f*C*ft
- Double_t a00=f02*b20+f03*b30,a01=f02*b21+f03*b31,a11=f12*b21+f13*b31+f14*b41;
+ 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)
fCyy += a00 + 2*b00;
fCzy += a01 + b01 + b10;
- fCcy += b20;
- fCey += b30;
- fCty += b40;
+ fCey += b20;
+ fCty += b30;
+ fCcy += b40;
fCzz += a11 + 2*b11;
- fCcz += b21;
- fCez += b31;
- fCtz += b41;
-
- fX=x2;
+ fCez += b21;
+ fCtz += b31;
+ fCcz += b41;
+ fX=x2;
//Multiple scattering ******************
-
Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fY)*(y1-fY)+(z1-fZ)*(z1-fZ));
- Double_t p2=GetPt()*GetPt()*(1.+fT*fT);
- p2 = TMath::Min(p2,1e+08); // to avoid division by (1-1) for stiff tracks
- Double_t beta2=p2/(p2 + pm*pm);
+ Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
+ Double_t beta2=p2/(p2 + GetMass()*GetMass());
+ Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
Double_t ey=fC*fX - fE, ez=fT;
Double_t xz=fC*ez, zz1=ez*ez+1, xy=fE+ey;
-
- Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
- fCcc += xz*xz*theta2;
- fCec += xz*ez*xy*theta2;
- fCtc += xz*zz1*theta2;
+
fCee += (2*ey*ez*ez*fE+1-ey*ey+ez*ez+fE*fE*ez*ez)*theta2;
fCte += ez*zz1*xy*theta2;
fCtt += zz1*zz1*theta2;
-
-
+ fCce += xz*ez*xy*theta2;
+ fCct += xz*zz1*theta2;
+ fCcc += xz*xz*theta2;
+ /*
+ 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;
+ fCee += dc22;
+ fCte += dc32;
+ fCtt += dc33;
+ fCce += dc42;
+ fCct += dc43;
+ fCcc += dc44;
+ */
//Energy losses************************
- if (x1 < x2) d=-d;
- Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
- //PH SetLength(GetLength()+d);
-
- cc = fC;
- fC*=(1.- sqrt(p2+pm*pm)/p2*dE);
- fE+=fX*(fC-cc);
-
- return 1;
+ if((5940*beta2/(1-beta2+1e-10) - beta2) < 0) return 0;
+
+ Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2+1e-10)) - beta2)*d*rho;
+ if (x1 < x2) dE=-dE;
+ cc=fC;
+ fC*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
+ fE+=fX*(fC-cc);
+
+ // track time measurement [SR, GSI 17.02.2002]
+ if (x1 < x2)
+ if (IsStartedTimeIntegral()) {
+ Double_t l2 = (fX-oldX)*(fX-oldX) + (fY-oldY)*(fY-oldY) + (fZ-oldZ)*(fZ-oldZ);
+ AddTimeStep(TMath::Sqrt(l2));
+ }
+ return 1;
}
+
//_____________________________________________________________________________
-Int_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq, UInt_t index)
+Int_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq, UInt_t index, Double_t h01)
{
// Assignes found cluster to the track and updates track information
- Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
+ Bool_t fNoTilt = kTRUE;
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
+ // add angular effect to the error contribution - MI
+ Float_t tangent2 = (fC*fX-fE)*(fC*fX-fE);
+ if (tangent2 < 0.90000){
+ tangent2 = tangent2/(1.-tangent2);
+ }
+ Float_t errang = tangent2*0.04; //
+ Float_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
+
+ Double_t r00=c->GetSigmaY2() +errang, r01=0., r11=c->GetSigmaZ2()*100.;
r00+=fCyy; r01+=fCzy; r11+=fCzz;
Double_t det=r00*r11 - r01*r01;
Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
Double_t k00=fCyy*r00+fCzy*r01, k01=fCyy*r01+fCzy*r11;
Double_t k10=fCzy*r00+fCzz*r01, k11=fCzy*r01+fCzz*r11;
- Double_t k20=fCcy*r00+fCcz*r01, k21=fCcy*r01+fCcz*r11;
- Double_t k30=fCey*r00+fCez*r01, k31=fCey*r01+fCez*r11;
- Double_t k40=fCty*r00+fCtz*r01, k41=fCty*r01+fCtz*r11;
+ Double_t k20=fCey*r00+fCez*r01, k21=fCey*r01+fCez*r11;
+ Double_t k30=fCty*r00+fCtz*r01, k31=fCty*r01+fCtz*r11;
+ Double_t k40=fCcy*r00+fCcz*r01, k41=fCcy*r01+fCcz*r11;
Double_t dy=c->GetY() - fY, dz=c->GetZ() - fZ;
- Double_t cur=fC + k20*dy + k21*dz, eta=fE + k30*dy + k31*dz;
- if (TMath::Abs(cur*fX-eta) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTRDtrack warning: Filtering failed !\n";
- return 0;
- }
+ Double_t cur=fC + k40*dy + k41*dz, eta=fE + k20*dy + k21*dz;
+
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fC = cur;
- fE = eta;
- fT += k40*dy + k41*dz;
+ if(fNoTilt) {
+ if (TMath::Abs(cur*fX-eta) >= 0.90000) {
+ // Int_t n=GetNumberOfClusters();
+ //if (n>4) cerr<<n<<" AliTRDtrack warning: Filtering failed !\n";
+ return 0;
+ }
+ fY += k00*dy + k01*dz;
+ fZ += k10*dy + k11*dz;
+ fE = eta;
+ //fT += k30*dy + k31*dz;
+ fC = cur;
+ }
+ else {
+ Double_t xu_factor = 100.; // empirical factor set by C.Xu
+ // in the first tilt version
+ dy=c->GetY() - fY; dz=c->GetZ() - fZ;
+ dy=dy+h01*dz;
+ Float_t add=0;
+ if (TMath::Abs(dz)>padlength/2.){
+ Float_t dy2 = c->GetY() - fY;
+ Float_t sign = (dz>0) ? -1.: 1.;
+ dy2+=h01*sign*padlength/2.;
+ dy = dy2;
+ add = 0;
+ }
+
+
+
+ r00=c->GetSigmaY2()+errang+add, r01=0., r11=c->GetSigmaZ2()*xu_factor;
+ r00+=(fCyy+2.0*h01*fCzy+h01*h01*fCzz);
+
+ r01+=(fCzy+h01*fCzz);
+ det=r00*r11 - r01*r01;
+ tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
+
+ k00=fCyy*r00+fCzy*(r01+h01*r00),k01=fCyy*r01+fCzy*(r11+h01*r01);
+ k10=fCzy*r00+fCzz*(r01+h01*r00),k11=fCzy*r01+fCzz*(r11+h01*r01);
+ k20=fCey*r00+fCez*(r01+h01*r00),k21=fCey*r01+fCez*(r11+h01*r01);
+ k30=fCty*r00+fCtz*(r01+h01*r00),k31=fCty*r01+fCtz*(r11+h01*r01);
+ k40=fCcy*r00+fCcz*(r01+h01*r00),k41=fCcy*r01+fCcz*(r11+h01*r01);
+
+
+ cur=fC + k40*dy + k41*dz; eta=fE + k20*dy + k21*dz;
+ if (TMath::Abs(cur*fX-eta) >= 0.90000) {
+ // Int_t n=GetNumberOfClusters();
+ //if (n>4) cerr<<n<<" AliTRDtrack warning: Filtering failed !\n";
+ return 0;
+ }
+ fY += k00*dy + k01*dz;
+ fZ += k10*dy + k11*dz;
+ fE = eta;
+ fT += k30*dy + k31*dz;
+ fC = cur;
+
+ k01+=h01*k00;
+ k11+=h01*k10;
+ k21+=h01*k20;
+ k31+=h01*k30;
+ k41+=h01*k40;
+
+ }
+ Double_t c01=fCzy, c02=fCey, c03=fCty, c04=fCcy;
+ Double_t c12=fCez, c13=fCtz, c14=fCcz;
- Double_t c01=fCzy, c02=fCcy, c03=fCey, c04=fCty;
- Double_t c12=fCcz, c13=fCez, c14=fCtz;
fCyy-=k00*fCyy+k01*fCzy; fCzy-=k00*c01+k01*fCzz;
- fCcy-=k00*c02+k01*c12; fCey-=k00*c03+k01*c13;
- fCty-=k00*c04+k01*c14;
-
+ fCey-=k00*c02+k01*c12; fCty-=k00*c03+k01*c13;
+ fCcy-=k00*c04+k01*c14;
+
fCzz-=k10*c01+k11*fCzz;
- fCcz-=k10*c02+k11*c12; fCez-=k10*c03+k11*c13;
- fCtz-=k10*c04+k11*c14;
+ fCez-=k10*c02+k11*c12; fCtz-=k10*c03+k11*c13;
+ fCcz-=k10*c04+k11*c14;
+
+ fCee-=k20*c02+k21*c12; fCte-=k20*c03+k21*c13;
+ fCce-=k20*c04+k21*c14;
+
+ fCtt-=k30*c03+k31*c13;
+ fCct-=k40*c03+k41*c13;
+ //fCct-=k30*c04+k31*c14; // symmetric formula MI
+
+ fCcc-=k40*c04+k41*c14;
+
+ Int_t n=GetNumberOfClusters();
+ fIndex[n]=index;
+ SetNumberOfClusters(n+1);
+
+ SetChi2(GetChi2()+chisq);
+ // cerr<<"in update: fIndex["<<fN<<"] = "<<index<<endl;
+
+ return 1;
+}
+//_____________________________________________________________________________
+Int_t AliTRDtrack::UpdateMI(const AliTRDcluster *c, Double_t chisq, UInt_t index, Double_t h01,
+ Int_t plane)
+{
+ // Assignes found cluster to the track and updates track information
+
+ Bool_t fNoTilt = kTRUE;
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
+ // add angular effect to the error contribution and make correction - MI
+ AliTRDclusterCorrection *corrector = AliTRDclusterCorrection::GetCorrection();
+ //
+ Double_t tangent2 = (fC*fX-fE)*(fC*fX-fE);
+ if (tangent2 < 0.90000){
+ tangent2 = tangent2/(1.-tangent2);
+ }
+ Double_t tangent = TMath::Sqrt(tangent2);
+ if ((fC*fX-fE)<0) tangent*=-1;
+ Double_t correction = 0;
+ Double_t errang = tangent2*0.04; //
+ if (corrector!=0){
+ //if (0){
+ correction = corrector->GetCorrection(plane,c->GetLocalTimeBin(),tangent);
+ if (TMath::Abs(correction)>0){
+ //if we have info
+ errang = corrector->GetSigma(plane,c->GetLocalTimeBin(),tangent);
+ errang *= errang;
+ errang += tangent2*0.04;
+ }
+ }
+
+ //
+ Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
+
+ Double_t r00=c->GetSigmaY2() +errang, r01=0., r11=c->GetSigmaZ2()*10000.;
+ r00+=fCyy; r01+=fCzy; r11+=fCzz;
+ Double_t det=r00*r11 - r01*r01;
+ Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
+
+ Double_t k00=fCyy*r00+fCzy*r01, k01=fCyy*r01+fCzy*r11;
+ Double_t k10=fCzy*r00+fCzz*r01, k11=fCzy*r01+fCzz*r11;
+ Double_t k20=fCey*r00+fCez*r01, k21=fCey*r01+fCez*r11;
+ Double_t k30=fCty*r00+fCtz*r01, k31=fCty*r01+fCtz*r11;
+ Double_t k40=fCcy*r00+fCcz*r01, k41=fCcy*r01+fCcz*r11;
- fCcc-=k20*c02+k21*c12; fCec-=k20*c03+k21*c13;
- fCtc-=k20*c04+k21*c14;
+ Double_t dy=c->GetY() - fY, dz=c->GetZ() - fZ;
+ Double_t cur=fC + k40*dy + k41*dz, eta=fE + k20*dy + k21*dz;
- fCee-=k30*c03+k31*c13;
- fCte-=k30*c04+k31*c14;
- fCtt-=k40*c04+k41*c14;
+ if(fNoTilt) {
+ if (TMath::Abs(cur*fX-eta) >= 0.90000) {
+ // Int_t n=GetNumberOfClusters();
+ //if (n>4) cerr<<n<<" AliTRDtrack warning: Filtering failed !\n";
+ return 0;
+ }
+ fY += k00*dy + k01*dz;
+ fZ += k10*dy + k11*dz;
+ fE = eta;
+ //fT += k30*dy + k31*dz;
+ fC = cur;
+ }
+ else {
+ Double_t xu_factor = 1000.; // empirical factor set by C.Xu
+ // in the first tilt version
+ dy=c->GetY() - fY; dz=c->GetZ() - fZ;
+ dy=dy+h01*dz+correction;
+ Double_t add=0;
+ if (TMath::Abs(dz)>padlength/2.){
+ //Double_t dy2 = c->GetY() - fY;
+ //Double_t sign = (dz>0) ? -1.: 1.;
+ //dy2-=h01*sign*padlength/2.;
+ //dy = dy2;
+ add =1.;
+ }
+ Double_t s00 = c->GetSigmaY2()+errang+add; // error pad
+ Double_t s11 = c->GetSigmaZ2()*xu_factor; // error pad-row
+ //
+ r00 = fCyy + 2*fCzy*h01 + fCzz*h01*h01+s00;
+ r01 = fCzy + fCzz*h01;
+ r11 = fCzz + s11;
+ det = r00*r11 - r01*r01;
+ // inverse matrix
+ tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
+
+ // K matrix
+ k00=fCyy*r00+fCzy*(r01+h01*r00),k01=fCyy*r01+fCzy*(r11+h01*r01);
+ k10=fCzy*r00+fCzz*(r01+h01*r00),k11=fCzy*r01+fCzz*(r11+h01*r01);
+ k20=fCey*r00+fCez*(r01+h01*r00),k21=fCey*r01+fCez*(r11+h01*r01);
+ k30=fCty*r00+fCtz*(r01+h01*r00),k31=fCty*r01+fCtz*(r11+h01*r01);
+ k40=fCcy*r00+fCcz*(r01+h01*r00),k41=fCcy*r01+fCcz*(r11+h01*r01);
+ //
+ //Update measurement
+ cur=fC + k40*dy + k41*dz; eta=fE + k20*dy + k21*dz;
+ if (TMath::Abs(cur*fX-eta) >= 0.90000) {
+ //Int_t n=GetNumberOfClusters();
+ // if (n>4) cerr<<n<<" AliTRDtrack warning: Filtering failed !\n";
+ return 0;
+ }
+ fY += k00*dy + k01*dz;
+ fZ += k10*dy + k11*dz;
+ fE = eta;
+ fT += k30*dy + k31*dz;
+ fC = cur;
+
+ k01+=h01*k00;
+ k11+=h01*k10;
+ k21+=h01*k20;
+ k31+=h01*k30;
+ k41+=h01*k40;
+
+ }
+ //Update covariance
+ //
+ //
+ Double_t oldyy = fCyy, oldzz = fCzz; //, oldee=fCee, oldcc =fCcc;
+ Double_t oldzy = fCzy, oldey = fCey, oldty=fCty, oldcy =fCcy;
+ Double_t oldez = fCez, oldtz = fCtz, oldcz=fCcz;
+ //Double_t oldte = fCte, oldce = fCce;
+ //Double_t oldct = fCct;
+
+ fCyy-=k00*oldyy+k01*oldzy;
+ fCzy-=k10*oldyy+k11*oldzy;
+ fCey-=k20*oldyy+k21*oldzy;
+ fCty-=k30*oldyy+k31*oldzy;
+ fCcy-=k40*oldyy+k41*oldzy;
+ //
+ fCzz-=k10*oldzy+k11*oldzz;
+ fCez-=k20*oldzy+k21*oldzz;
+ fCtz-=k30*oldzy+k31*oldzz;
+ fCcz-=k40*oldzy+k41*oldzz;
+ //
+ fCee-=k20*oldey+k21*oldez;
+ fCte-=k30*oldey+k31*oldez;
+ fCce-=k40*oldey+k41*oldez;
+ //
+ fCtt-=k30*oldty+k31*oldtz;
+ fCct-=k40*oldty+k41*oldtz;
+ //
+ fCcc-=k40*oldcy+k41*oldcz;
+ //
- Int_t n=GetNumberOfClusters();
+ Int_t n=GetNumberOfClusters();
fIndex[n]=index;
- SetNumberOfClusters(n+1);
+ SetNumberOfClusters(n+1);
- SetChi2(GetChi2()+chisq);
+ SetChi2(GetChi2()+chisq);
// cerr<<"in update: fIndex["<<fN<<"] = "<<index<<endl;
- return 1;
+ return 1;
}
+
//_____________________________________________________________________________
Int_t AliTRDtrack::Rotate(Double_t alpha)
{
// Rotates track parameters in R*phi plane
+
+ fNRotate++;
fAlpha += alpha;
+ if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
+ if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
Double_t x1=fX, y1=fY;
Double_t ca=cos(alpha), sa=sin(alpha);
Double_t r1=fC*fX - fE;
- if (TMath::Abs(r1) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
- if (n>4) cerr<<n<<" AliTRDtrack warning: Rotation failed !\n";
- return 0;
- }
-
fX = x1*ca + y1*sa;
- fY=-x1*sa + y1*ca;
+ fY =-x1*sa + y1*ca;
+ if((r1*r1) > 1) return 0;
fE=fE*ca + (fC*y1 + sqrt(1.- r1*r1))*sa;
Double_t r2=fC*fX - fE;
- if (TMath::Abs(r2) >= 0.99999) {
- Int_t n=GetNumberOfClusters();
+ if (TMath::Abs(r2) >= 0.90000) {
+ Int_t n=GetNumberOfClusters();
if (n>4) cerr<<n<<" AliTRDtrack warning: Rotation failed !\n";
return 0;
}
+ if((r2*r2) > 1) return 0;
Double_t y0=fY + sqrt(1.- r2*r2)/fC;
if ((fY-y0)*fC >= 0.) {
- Int_t n=GetNumberOfClusters();
+ Int_t n=GetNumberOfClusters();
if (n>4) cerr<<n<<" AliTRDtrack warning: Rotation failed !!!\n";
return 0;
}
//f = F - 1
- Double_t f00=ca-1, f32=(y1 - r1*x1/sqrt(1.- r1*r1))*sa,
- f30=fC*sa, f33=(ca + sa*r1/sqrt(1.- r1*r1))-1;
+ Double_t f00=ca-1, f24=(y1 - r1*x1/sqrt(1.- r1*r1))*sa,
+ f20=fC*sa, f22=(ca + sa*r1/sqrt(1.- r1*r1))-1;
//b = C*ft
- Double_t b00=fCyy*f00, b03=fCyy*f30+fCcy*f32+fCey*f33;
- Double_t b10=fCzy*f00, b13=fCzy*f30+fCcz*f32+fCez*f33;
- Double_t b20=fCcy*f00, b23=fCcy*f30+fCcc*f32+fCec*f33;
- Double_t b30=fCey*f00, b33=fCey*f30+fCec*f32+fCee*f33;
- Double_t b40=fCty*f00, b43=fCty*f30+fCtc*f32+fCte*f33;
+ Double_t b00=fCyy*f00, b02=fCyy*f20+fCcy*f24+fCey*f22;
+ Double_t b10=fCzy*f00, b12=fCzy*f20+fCcz*f24+fCez*f22;
+ Double_t b20=fCey*f00, b22=fCey*f20+fCce*f24+fCee*f22;
+ Double_t b30=fCty*f00, b32=fCty*f20+fCct*f24+fCte*f22;
+ Double_t b40=fCcy*f00, b42=fCcy*f20+fCcc*f24+fCce*f22;
//a = f*b = f*C*ft
- Double_t a00=f00*b00, a03=f00*b03, a33=f30*b03+f32*b23+f33*b33;
+ 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)
fCyy += a00 + 2*b00;
fCzy += b10;
- fCcy += b20;
- fCey += a03+b30+b03;
- fCty += b40;
- fCez += b13;
- fCec += b23;
- fCee += a33 + 2*b33;
- fCte += b43;
-
- // *** fCyy+=dy2*sa*sa*r1*r1/(1.- r1*r1);
- // *** fCzz+=d2y*sa*sa*fT*fT/(1.- r1*r1);
-
- return 1;
+ fCey += a02+b20+b02;
+ fCty += b30;
+ fCcy += b40;
+ fCez += b12;
+ fCte += b32;
+ fCee += a22 + 2*b22;
+ fCce += b42;
+
+ return 1;
}
//_____________________________________________________________________________
-Double_t AliTRDtrack::GetPredictedChi2(const AliTRDcluster *c) const
+Double_t AliTRDtrack::GetPredictedChi2(const AliTRDcluster *c, Double_t h01) const
{
- /*
- Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
- r00+=fCyy; r01+=fCzy; r11+=fCzz;
-
- Double_t det=r00*r11 - r01*r01;
- if (TMath::Abs(det) < 1.e-10) {
- if (fN>4) cerr<<fN<<" AliTRDtrack warning: Singular matrix !\n";
- return 1e10;
+
+ Bool_t fNoTilt = kTRUE;
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
+ Double_t chi2, dy, r00, r01, r11;
+
+ if(fNoTilt) {
+ dy=c->GetY() - fY;
+ r00=c->GetSigmaY2();
+ chi2 = (dy*dy)/r00;
}
- Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
-
- Double_t dy=c->GetY() - fY, dz=c->GetZ() - fZ;
-
- return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
- */
-
- Double_t dy=c->GetY() - fY;
- Double_t r00=c->GetSigmaY2();
-
- return (dy*dy)/r00;
+ else {
+ r00=c->GetSigmaY2(); r01=0.; r11=c->GetSigmaZ2();
+ r00+=fCyy; r01+=fCzy; r11+=fCzz;
+
+ Double_t det=r00*r11 - r01*r01;
+ if (TMath::Abs(det) < 1.e-10) {
+ Int_t n=GetNumberOfClusters();
+ if (n>4) cerr<<n<<" AliTRDtrack warning: Singular matrix !\n";
+ return 1e10;
+ }
+ Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
+ Double_t dy=c->GetY() - fY, dz=c->GetZ() - fZ;
+ dy=dy+h01*dz;
-}
+ chi2 = (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
+ }
+ return chi2;
+}
//_________________________________________________________________________
//
fCyy*=10.;
- fCzy=0.; fCzz*=10.;
- fCcy=0.; fCcz=0.; fCcc*=10.;
- fCey=0.; fCez=0.; fCec=0.; fCee*=10.;
- fCty=0.; fCtz=0.; fCtc=0.; fCte=0.; fCtt*=10.;
+ fCzy=0.; fCzz*=10.;
+ fCey=0.; fCez=0.; fCee*=10.;
+ fCty=0.; fCtz=0.; fCte=0.; fCtt*=10.;
+ fCcy=0.; fCcz=0.; fCce=0.; fCct=0.; fCcc*=10.;
+}
+
+void AliTRDtrack::ResetCovariance(Float_t mult) {
+ //
+ // Resets covariance matrix
+ //
+ fCyy*=mult;
+ fCzy*=0.; fCzz*=mult;
+ fCey*=0.; fCez*=0.; fCee*=mult;
+ fCty*=0.; fCtz*=0.; fCte*=0.; fCtt*=mult;
+ fCcy*=0.; fCcz*=0.; fCce*=0.; fCct*=0.; fCcc*=mult;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff