* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-////////////////////////////////////////////////////////////////////////
-//
-// AliTOFtrack class
-//
-// Authors: Bologna-CERN-ITEP-Salerno Group
-//
-// Description: class for handling ESD extracted tracks for TOF matching.
-/* $Id$ */
-#include <Riostream.h>
+/* $Id$ */
-#include <TObject.h>
+/////////////////////////////////////////////////////////////////////////////
+// //
+// AliTOFtrack class //
+// //
+// Authors: Bologna-CERN-ITEP-Salerno Group //
+// //
+// Description: class for handling ESD extracted tracks for TOF matching. //
+// //
+/////////////////////////////////////////////////////////////////////////////
-#include "AliLog.h"
#include "AliESDtrack.h"
+#include "AliTracker.h"
#include "AliTOFGeometry.h"
-#include "AliTOFGeometryV4.h"
-#include "AliTOFGeometryV5.h"
#include "AliTOFtrack.h"
ClassImp(AliTOFtrack)
//_____________________________________________________________________________
-AliTOFtrack::AliTOFtrack(const AliTOFtrack& t) : AliKalmanTrack(t) {
+AliTOFtrack::AliTOFtrack() :
+ AliKalmanTrack(),
+ fSeedInd(-1),
+ fSeedLab(-1)
+{
//
- // Copy constructor.
+ // Default constructor.
//
-
- SetSeedIndex(t.GetSeedIndex());
- SetLabel(t.GetLabel());
- fSeedLab=t.GetSeedLabel();
- SetChi2(t.GetChi2());
-
- fAlpha=t.fAlpha;
- fX=t.fX;
-
- fY=t.fY; fZ=t.fZ; fE=t.fE; fT=t.fT; fC=t.fC;
-
- fCyy=t.fCyy;
- fCzy=t.fCzy; fCzz=t.fCzz;
- 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;
-
- fTOFgeometry = new AliTOFGeometryV4();
+}
+//_____________________________________________________________________________
+AliTOFtrack::AliTOFtrack(const AliTOFtrack& t) :
+ AliKalmanTrack(t),
+ fSeedInd(t.fSeedInd),
+ fSeedLab(t.fSeedLab)
+{
+ //
+ // Copy constructor.
+ //
}
//_____________________________________________________________________________
-AliTOFtrack::AliTOFtrack(const AliESDtrack& t)
- :AliKalmanTrack() {
+AliTOFtrack::AliTOFtrack(const AliESDtrack& t) :
+ AliKalmanTrack(),
+ fSeedInd(-1),
+ fSeedLab(-1)
+{
//
// Constructor from AliESDtrack
//
-
- fTOFgeometry = new AliTOFGeometryV4();
-
- SetSeedIndex(-1);
SetLabel(t.GetLabel());
SetChi2(0.);
SetMass(t.GetMass());
- 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;
-
- fY=p[0];
- fZ=p[1]; SaveLocalConvConst();
- fT=p[3]; x=GetLocalConvConst();
- 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];
+ Set(t.GetX(),t.GetAlpha(),t.GetParameter(),t.GetCovariance());
if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
StartTimeIntegral();
Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
SetIntegratedLength(t.GetIntegratedLength());
-
}
-//____________________________________________________________________________
-void AliTOFtrack::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
- //
- // This function returns external TOF track representation
- //
- xr=fX;
- x[0]=GetY();
- x[1]=GetZ();
- x[2]=GetSnp();
- x[3]=GetTgl();
- x[4]=Get1Pt();
-}
-//_____________________________________________________________________________
-void AliTOFtrack::GetExternalCovariance(Double_t cc[15]) const {
- //
- // This function returns external representation of the covriance matrix.
- //
- Double_t a=GetLocalConvConst();
- 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]=fCct*a; cc[14]=fCcc*a*a;
-
-}
-
-
-//_____________________________________________________________________________
-void AliTOFtrack::GetCovariance(Double_t cc[15]) const {
- //
- // Returns the covariance matrix.
- //
+//____________________________________________________________________________
+AliTOFtrack& AliTOFtrack::operator=(const AliTOFtrack &/*source*/)
+{
+ // ass. op.
- cc[0]=fCyy;
- cc[1]=fCzy; cc[2]=fCzz;
- 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;
-
-}
+ return *this;
+}
//_____________________________________________________________________________
-Int_t AliTOFtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho)
+Bool_t AliTOFtrack::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 (xk == fX) return 1;
+ if (xk == GetX()) return kTRUE;
- if (TMath::Abs(fC*xk - fE) >= 0.90000) {
- return 0;
- }
- Double_t lcc=GetLocalConvConst();
+ Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
- // track Length measurement [SR, GSI, 17.02.2003]
+ Double_t bz=GetBz();
+ if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE;
- Double_t oldX = fX, oldY = fY, oldZ = fZ;
+ Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) +
+ (GetY()-oldY)*(GetY()-oldY) +
+ (GetZ()-oldZ)*(GetZ()-oldZ));
+ if (IsStartedTimeIntegral() && GetX()>oldX) AddTimeStep(d);
+
+ if (!AliExternalTrackParam::CorrectForMaterial(d*rho/x0,x0,GetMass()))
+ return kFALSE;
- 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;
- if((c2*c2) > 1) {
- return 0;
- }
- Double_t r2=sqrt(1.- c2*c2);
-
- fY += dx*(c1+c2)/(r1+r2);
- fZ += dx*(c1+c2)/(c1*r2 + c2*r1)*fT;
-
- //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*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*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+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;
- fCey += b20;
- fCty += b30;
- fCcy += b40;
- fCzz += a11 + 2*b11;
- fCez += b21;
- fCtz += b31;
- fCcz += b41;
-
- fX=x2;
-
- //Change of the magnetic field *************
- SaveLocalConvConst();
- cc=fC;
- fC*=lcc/GetLocalConvConst();
- fE+=fX*(fC-cc);
-
- //Multiple scattering ******************
- Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-fY)*(y1-fY)+(z1-fZ)*(z1-fZ));
- 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;
-
- 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((5940*beta2/(1-beta2+1e-10) - beta2) < 0){return 0;}
Double_t kinE = TMath::Sqrt(p2);
if (dE>0.8*kinE) dE = 0.8*kinE; //
if (dE<0) dE = 0.0; // not valid region for Bethe bloch
- //
- //
- 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;
+ return kTRUE;
}
//_____________________________________________________________________________
-Int_t AliTOFtrack::PropagateToInnerTOF( Bool_t holes)
+Bool_t AliTOFtrack::PropagateToInnerTOF()
{
// Propagates a track of particle with mass=pm to a reference plane
// defined by x=xk through media of density=rho and radiationLength=x0
- Double_t ymax=fTOFgeometry->RinTOF()*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
+ Double_t ymax=AliTOFGeometry::RinTOF()*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
Bool_t skip = kFALSE;
- Double_t y=GetYat(fTOFgeometry->RinTOF(),skip);
- if(skip){
- return 0;
+ Double_t y=GetYat(AliTOFGeometry::RinTOF(),skip);
+ if (skip) {
+ return kFALSE;
}
if (y > ymax) {
if (!Rotate(AliTOFGeometry::GetAlpha())) {
- return 0;
+ return kFALSE;
}
} else if (y <-ymax) {
if (!Rotate(-AliTOFGeometry::GetAlpha())) {
- return 0;
+ return kFALSE;
}
}
for (Int_t istep=0;istep<nsteps;istep++){
Float_t xp = x+istep*0.5;
Double_t param[2];
- GetPropagationParameters(holes,param);
+ GetPropagationParameters(param);
PropagateTo(xp,param[0],param[1]);
}
- if(!PropagateTo(fTOFgeometry->RinTOF()))return 0;
+ if(!PropagateTo(AliTOFGeometry::RinTOF()))return 0;
- return 1;
+ return kTRUE;
}
-//_____________________________________________________________________________
-Int_t AliTOFtrack::Rotate(Double_t alpha)
-{
- // Rotates track parameters in R*phi plane
-
-
- 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;
-
- fX = x1*ca + y1*sa;
- 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) >= 0.90000) {
- AliWarning("Rotation failed !");
- return 0;
- }
-
- if((r2*r2) > 1) return 0;
- Double_t y0=fY + sqrt(1.- r2*r2)/fC;
- if ((fY-y0)*fC >= 0.) {
- AliWarning("Rotation failed !!!");
- return 0;
+//_________________________________________________________________________
+Double_t AliTOFtrack::GetPredictedChi2(const AliCluster3D *c) const {
+ //
+ //
+ //
+ Double_t p[3]={c->GetX(), c->GetY(), c->GetZ()};
+ Double_t covyz[3]={c->GetSigmaY2(), c->GetSigmaYZ(), c->GetSigmaZ2()};
+ Double_t covxyz[3]={c->GetSigmaX2(), c->GetSigmaXY(), c->GetSigmaXZ()};
+ return AliExternalTrackParam::GetPredictedChi2(p, covyz, covxyz);
+}
+//_________________________________________________________________________
+Bool_t AliTOFtrack::PropagateTo(const AliCluster3D *c) {
+ //
+ //
+ //
+ Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
+ Double_t p[3]={c->GetX(), c->GetY(), c->GetZ()};
+ Double_t covyz[3]={c->GetSigmaY2(), c->GetSigmaYZ(), c->GetSigmaZ2()};
+ Double_t covxyz[3]={c->GetSigmaX2(), c->GetSigmaXY(), c->GetSigmaXZ()};
+ Double_t bz=GetBz();
+ if (!AliExternalTrackParam::PropagateTo(p, covyz, covxyz, bz)) return kFALSE;
+ if (IsStartedTimeIntegral()) {
+ Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) +
+ (GetY()-oldY)*(GetY()-oldY) +
+ (GetZ()-oldZ)*(GetZ()-oldZ));
+ if (GetX()<oldX) d=-d;
+ AddTimeStep(d);
}
-
- //f = F - 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, 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, a02=f00*b02, a22=f20*b02+f24*b42+f22*b22;
-
- //F*C*Ft = C + (a + b + bt)
- fCyy += a00 + 2*b00;
- fCzy += b10;
- fCey += a02+b20+b02;
- fCty += b30;
- fCcy += b40;
- fCez += b12;
- fCte += b32;
- fCee += a22 + 2*b22;
- fCce += b42;
-
- return 1;
-}
-
+ return kTRUE;
+}
//_________________________________________________________________________
Double_t AliTOFtrack::GetYat(Double_t xk, Bool_t & skip) const {
//-----------------------------------------------------------------
// This function calculates the Y-coordinate of a track at the plane x=xk.
// Needed for matching with the TOF (I.Belikov)
//-----------------------------------------------------------------
- skip=kFALSE;
- Double_t c1=fC*fX - fE, r1=TMath::Sqrt(TMath::Abs(1.- c1*c1));
- Double_t c2=fC*xk - fE, r2=TMath::Sqrt(TMath::Abs(1.- c2*c2));
- if( ((1.- c2*c2)<0) || ((1.- c1*c1)<0) ) skip=kTRUE;
- return fY + (xk-fX)*(c1+c2)/(r1+r2);
+ Double_t y=0.;
+ skip=(!GetYAt(xk,GetBz(),y));
+ return y;
}
-//_________________________________________________________________________
-void AliTOFtrack::GetPxPyPz(Double_t& px, Double_t& py, Double_t& pz) const
-{
- // Returns reconstructed track momentum in the global system.
-
- Double_t pt=TMath::Abs(GetPt()); // GeV/c
- Double_t r=fC*fX-fE;
-
- Double_t y0;
- if(r > 1) { py = pt; px = 0; }
- else if(r < -1) { py = -pt; px = 0; }
- else {
- y0=fY + sqrt(1.- r*r)/fC;
- px=-pt*(fY-y0)*fC; //cos(phi);
- py=-pt*(fE-fX*fC); //sin(phi);
- }
- pz=pt*fT;
- Double_t tmp=px*TMath::Cos(fAlpha) - py*TMath::Sin(fAlpha);
- py=px*TMath::Sin(fAlpha) + py*TMath::Cos(fAlpha);
- px=tmp;
-
-}
-
-//_________________________________________________________________________
-void AliTOFtrack::GetGlobalXYZ(Double_t& x, Double_t& y, Double_t& z) const
-{
- // Returns reconstructed track coordinates in the global system.
-
- x = fX; y = fY; z = fZ;
- Double_t tmp=x*TMath::Cos(fAlpha) - y*TMath::Sin(fAlpha);
- y=x*TMath::Sin(fAlpha) + y*TMath::Cos(fAlpha);
- x=tmp;
-
-}
-
-//_________________________________________________________________________
-void AliTOFtrack::ResetCovariance() {
- //
- // Resets covariance matrix
- //
-
- fCyy*=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 AliTOFtrack::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;
-}
//_____________________________________________________________________________
Int_t AliTOFtrack::Compare(const TObject *o) const {
return 0;
}
+
//_____________________________________________________________________________
-void AliTOFtrack::GetPropagationParameters(Bool_t holes, Double_t *param) {
+void AliTOFtrack::GetPropagationParameters(Double_t *param) {
//Get average medium density, x0 while propagating the track
//For TRD holes description
-
+ /*
Double_t thetamin = (90.-31.1) * TMath::Pi()/180.;
Double_t thetamax = (90.+31.1) * TMath::Pi()/180.;
Double_t zmin = -55.;
Double_t zmax = 55.;
+ */
// Detector inner/outer radii
Double_t rTPC = 261.53;
Double_t x0TRD = 171.7;
Double_t rhoTRD =0.33;
- Int_t isec = GetSector();
- Double_t xtr,ytr,ztr;
- GetGlobalXYZ(xtr,ytr,ztr);
- Float_t thetatr = TMath::ATan2(TMath::Sqrt(xtr*xtr+ytr*ytr),ztr);
+ // Int_t isec = GetSector();
+ Double_t r[3]; GetXYZ(r);
+ // Float_t thetatr = TMath::ATan2(TMath::Sqrt(r[0]*r[0]+r[1]*r[1]),r[2]);
+ /*
if(holes){
if (isec == 0 || isec == 1 || isec == 2 ) {
if( thetatr>=thetamin && thetatr<=thetamax){
}
}
if (isec == 11 || isec == 12 || isec == 13 || isec == 14 || isec == 15 ) {
- if( ztr>=zmin && ztr<=zmax){
+ if( r[2]>=zmin && r[2]<=zmax){
x0TRD= x0Air;
rhoTRD = rhoAir;
}
}
}
-
+ */
if(GetX() <= rTPC)
{param[0]=x0TPC;param[1]=rhoTPC;}
else if(GetX() > rTPC && GetX() < rTPCTRD)
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff