#include <TMath.h>
#include <TVector2.h>
+#include "AliTracker.h"
#include "AliESDtrack.h"
#include "AliTRDgeometry.h"
#include "AliTRDcluster.h"
// //
///////////////////////////////////////////////////////////////////////////////
-//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack()
- :AliKalmanTrack()
- ,fSeedLab(-1)
- ,fdEdx(0)
- ,fDE(0)
- ,fAlpha(0)
- ,fX(0)
- ,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(1e10)
- ,fCzy(0)
- ,fCzz(1e10)
- ,fCey(0)
- ,fCez(0)
- ,fCee(1e10)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(1e10)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(1e10)
- ,fLhElectron(0)
- ,fNWrong(0)
- ,fNRotate(0)
- ,fNCross(0)
- ,fNExpected(0)
- ,fNLast(0)
- ,fNExpectedLast(0)
- ,fNdedx(0)
- ,fChi2Last(1e10)
- ,fBackupTrack(0x0)
+AliTRDtrack::AliTRDtrack():
+ AliKalmanTrack(),
+ fSeedLab(-1),
+ fdEdx(0),
+ fdEdxT(0),
+ fDE(0),
+ fStopped(kFALSE),
+ fLhElectron(0),
+ fNWrong(0),
+ fNRotate(0),
+ fNCross(0),
+ fNExpected(0),
+ fNLast(0),
+ fNExpectedLast(0),
+ fNdedx(0),
+ fChi2Last(1e10),
+ fBackupTrack(0x0)
{
- //
- // AliTRDtrack default constructor
- //
-
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i=0; i<kNplane; i++) {
+ for (Int_t j=0; j<kNslice; j++) {
fdEdxPlane[i][j] = 0;
}
fTimBinPlane[i] = -1;
}
-
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
- fdQdl[k] = 0;
- }
-
- for (i = 0; i < 3; i++) {
- fBudget[i] = 0;
+ for (UInt_t i=0; i<kMAXCLUSTERSPERTRACK; i++) {
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fdQdl[i] = 0;
}
-
+ for (Int_t i=0; i<3; i++) fBudget[i] = 0;
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliTRDcluster *c, UInt_t index,
- const Double_t xx[5], const Double_t cc[15],
- Double_t xref, Double_t alpha)
- :AliKalmanTrack()
- ,fSeedLab(-1)
- ,fdEdx(0.0)
- ,fDE(0.0)
- ,fAlpha(alpha)
- ,fX(xref)
- ,fStopped(kFALSE)
- ,fY(xx[0])
- ,fZ(xx[1])
- ,fE(xx[2])
- ,fT(xx[3])
- ,fC(xx[4])
- ,fCyy(cc[0])
- ,fCzy(cc[1])
- ,fCzz(cc[2])
- ,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])
- ,fLhElectron(0.0)
- ,fNWrong(0)
- ,fNRotate(0)
- ,fNCross(0)
- ,fNExpected(0)
- ,fNLast(0)
- ,fNExpectedLast(0)
- ,fNdedx(0)
- ,fChi2Last(1e10)
- ,fBackupTrack(0x0)
+AliTRDtrack::AliTRDtrack(const AliTRDcluster *c, Int_t index,
+ const Double_t p[5], const Double_t cov[15],
+ Double_t x, Double_t alpha) :
+ AliKalmanTrack(),
+ fSeedLab(-1),
+ fdEdx(0),
+ fdEdxT(0),
+ fDE(0),
+ fStopped(kFALSE),
+ fLhElectron(0),
+ fNWrong(0),
+ fNRotate(0),
+ fNCross(0),
+ fNExpected(0),
+ fNLast(0),
+ fNExpectedLast(0),
+ fNdedx(0),
+ fChi2Last(1e10),
+ fBackupTrack(0x0)
{
- //
- // AliTRDtrack main constructor
- //
-
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
+ //-----------------------------------------------------------------
+ // This is the main track constructor.
+ //-----------------------------------------------------------------
+ Double_t cnv=1./(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
+ };
+
+ Set(x,alpha,pp,cc);
- SaveLocalConvConst();
-
- fIndex[0] = index;
SetNumberOfClusters(1);
+ fIndex[0]=index;
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i=0;i<kNplane;i++){
+ for (Int_t j=0; j<kNslice; j++) {
fdEdxPlane[i][j] = 0;
}
fTimBinPlane[i] = -1;
}
Double_t q = TMath::Abs(c->GetQ());
- Double_t s = fX * fC - fE;
- Double_t t = fT;
- if (s*s < 1.0) {
- q *= TMath::Sqrt((1-s*s)/(1+t*t));
- }
- fdQdl[0] = q;
-
- for (k = 1; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
- }
+ Double_t s = GetSnp(), t=GetTgl();
+ if(s*s < 1) q *= TMath::Sqrt((1-s*s)/(1+t*t));
- for (i = 0; i < 3; i++) {
- fBudget[i] = 0;
+ fdQdl[0] = q;
+ // initialisation [SR, GSI 18.02.2003] (i startd for 1)
+ for(UInt_t i=1; i<kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; //backup indexes MI
}
-
+ for (Int_t i=0;i<3;i++) fBudget[i]=0;
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliTRDtrack &t)
- :AliKalmanTrack(t)
- ,fSeedLab(t.fSeedLab)
- ,fdEdx(t.fdEdx)
- ,fDE(t.fDE)
- ,fAlpha(t.fAlpha)
- ,fX(t.fX)
- ,fStopped(t.fStopped)
- ,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)
- ,fLhElectron(0.0)
- ,fNWrong(t.fNWrong)
- ,fNRotate(t.fNRotate)
- ,fNCross(t.fNCross)
- ,fNExpected(t.fNExpected)
- ,fNLast(t.fNLast)
- ,fNExpectedLast(t.fNExpectedLast)
- ,fNdedx(t.fNdedx)
- ,fChi2Last(t.fChi2Last)
- ,fBackupTrack(0x0)
+AliTRDtrack::AliTRDtrack(const AliTRDtrack& t) :
+ AliKalmanTrack(t),
+ fSeedLab(t.GetSeedLabel()),
+ fdEdx(t.fdEdx),
+ fdEdxT(t.fdEdx),
+ fDE(t.fDE),
+ fStopped(t.fStopped),
+ fLhElectron(0),
+ fNWrong(t.fNWrong),
+ fNRotate(t.fNRotate),
+ fNCross(t.fNCross),
+ fNExpected(t.fNExpected),
+ fNLast(t.fNLast),
+ fNExpectedLast(t.fNExpectedLast),
+ fNdedx(t.fNdedx),
+ fChi2Last(t.fChi2Last),
+ fBackupTrack(0x0)
{
//
// Copy constructor.
//
-
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i=0;i<kNplane;i++){
+ for (Int_t j=0; j<kNslice; j++) {
fdEdxPlane[i][j] = t.fdEdxPlane[i][j];
}
fTimBinPlane[i] = t.fTimBinPlane[i];
fTracklets[i] = t.fTracklets[i];
}
- Int_t n = t.GetNumberOfClusters();
- for (i = 0; i < n; i++) {
- fIndex[i] = t.fIndex[i];
- fIndexBackup[i] = t.fIndex[i];
- fdQdl[i] = t.fdQdl[i];
- }
- for (k = n; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
- }
-
- for (i = 0; i < 6; i++) {
- fTracklets[i] = t.fTracklets[i];
+ 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];
}
- for (i = 0; i < 3; i++) {
- fBudget[i] = t.fBudget[i];
+ // initialisation (i starts from n) [SR, GSI, 18.02.2003]
+ for(UInt_t i=n; i<kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; //MI backup indexes
}
-
+ for (Int_t i=0;i<3;i++) fBudget[i]=t.fBudget[i];
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliKalmanTrack &t, Double_t alpha)
- :AliKalmanTrack(t)
- ,fSeedLab(-1)
- ,fdEdx(t.GetPIDsignal())
- ,fDE(0)
- ,fAlpha(alpha)
- ,fX(0)
- ,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(0)
- ,fCzy(0)
- ,fCzz(0)
- ,fCey(0)
- ,fCez(0)
- ,fCee(0)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(0)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(0)
- ,fLhElectron(0.0)
- ,fNWrong(0)
- ,fNRotate(0)
- ,fNCross(0)
- ,fNExpected(0)
- ,fNLast(0)
- ,fNExpectedLast(0)
- ,fNdedx(0)
- ,fChi2Last(0.0)
- ,fBackupTrack(0x0)
+AliTRDtrack::AliTRDtrack(const AliKalmanTrack& t, Double_t /*alpha*/):
+ AliKalmanTrack(t),
+ fSeedLab(-1),
+ fdEdx(t.GetPIDsignal()),
+ fdEdxT(0),
+ fDE(0),
+ fStopped(kFALSE),
+ fLhElectron(0.0),
+ fNWrong(0),
+ fNRotate(0),
+ fNCross(0),
+ fNExpected(0),
+ fNLast(0),
+ fNExpectedLast(0),
+ fNdedx(0),
+ fChi2Last(0.0),
+ fBackupTrack(0x0)
{
//
// Constructor from AliTPCtrack or AliITStrack .
//
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
- SetChi2(0.0);
+ SetLabel(t.GetLabel());
+ SetChi2(0.);
+ SetMass(t.GetMass());
SetNumberOfClusters(0);
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i=0;i<kNplane;i++){
+ for (Int_t j=0;j<kNslice;j++){
fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
}
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
-
- Double_t x;
- Double_t p[5];
- t.GetExternalParameters(x,p);
- fX = x;
- fY = p[0];
- fZ = p[1];
- 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] - 2.0*fX*c[12] + c[ 5];
- Double_t c32 = fX * c[13] - c[ 8];
- Double_t c20 = fX * c[10] - c[ 3];
- Double_t c21 = fX * c[11] - c[ 4];
- Double_t 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];
-
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- fIndex[k] = 0;
- fIndexBackup[k] = 0;
+ // Initialization [SR, GSI, 18.02.2003]
+ for(UInt_t i=0; i<kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0; // MI backup indexes
}
- for (i = 0; i < 3; i++) {
- fBudget[i] = 0;
- }
-
+ for (Int_t i=0;i<3;i++) { fBudget[i]=0;};
}
//_____________________________________________________________________________
-AliTRDtrack::AliTRDtrack(const AliESDtrack &t)
- :AliKalmanTrack()
- ,fSeedLab(-1)
- ,fdEdx(t.GetTRDsignal())
- ,fDE(0)
- ,fAlpha(t.GetAlpha())
- ,fX(0)
- ,fStopped(kFALSE)
- ,fY(0)
- ,fZ(0)
- ,fE(0)
- ,fT(0)
- ,fC(0)
- ,fCyy(1e10)
- ,fCzy(0)
- ,fCzz(1e10)
- ,fCey(0)
- ,fCez(0)
- ,fCee(1e10)
- ,fCty(0)
- ,fCtz(0)
- ,fCte(0)
- ,fCtt(1e10)
- ,fCcy(0)
- ,fCcz(0)
- ,fCce(0)
- ,fCct(0)
- ,fCcc(1e10)
- ,fLhElectron(0.0)
- ,fNWrong(0)
- ,fNRotate(0)
- ,fNCross(0)
- ,fNExpected(0)
- ,fNLast(0)
- ,fNExpectedLast(0)
- ,fNdedx(0)
- ,fChi2Last(0.0)
- ,fBackupTrack(0x0)
+AliTRDtrack::AliTRDtrack(const AliESDtrack &t):
+ AliKalmanTrack(),
+ fSeedLab(-1),
+ fdEdx(t.GetTRDsignal()),
+ fdEdxT(0),
+ fDE(0),
+ fStopped(kFALSE),
+ fLhElectron(0),
+ fNWrong(0),
+ fNRotate(0),
+ fNCross(0),
+ fNExpected(0),
+ fNLast(0),
+ fNExpectedLast(0),
+ fNdedx(0),
+ fChi2Last(1e10),
+ fBackupTrack(0x0)
{
//
// Constructor from AliESDtrack
//
-
- Int_t i = 0;
- Int_t j = 0;
- UInt_t k = 0;
-
SetLabel(t.GetLabel());
SetChi2(0.);
SetMass(t.GetMass());
SetNumberOfClusters(t.GetTRDclusters(fIndex));
Int_t ncl = t.GetTRDclusters(fIndexBackup);
- for (k = ncl; k < kMAXCLUSTERSPERTRACK; k++) {
- fIndexBackup[k] = 0;
- fIndex[k] = 0;
+ for (UInt_t i=ncl;i<kMAXCLUSTERSPERTRACK;i++) {
+ fIndexBackup[i]=0;
+ fIndex[i] = 0; //MI store indexes
}
-
- for (i = 0; i < kNplane; i++) {
- for (j = 0; j < kNslice; j++) {
+ for (Int_t i=0;i<kNplane;i++){
+ for (Int_t j=0;j<kNslice;j++){
fdEdxPlane[i][j] = t.GetTRDsignals(i,j);
}
fTimBinPlane[i] = t.GetTRDTimBin(i);
}
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
- // Conversion of the covariance matrix
- Double_t x;
- Double_t p[5];
- t.GetExternalParameters(x,p);
- Double_t c[15];
- t.GetExternalCovariance(c);
- if (t.GetStatus() & AliESDtrack::kTRDbackup) {
- t.GetOuterExternalParameters(fAlpha,x,p);
- t.GetOuterExternalCovariance(c);
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
+ const AliExternalTrackParam *par=&t;
+ if (t.GetStatus()&AliESDtrack::kTRDbackup) {
+ par=t.GetOuterParam();
+ if (!par) {AliError("***** No backup info !!! ****"); par=&t;}
}
+ Set(par->GetX(),par->GetAlpha(),par->GetParameter(),par->GetCovariance());
- fX = x;
- fY = p[0];
- fZ = p[1];
- SaveLocalConvConst();
- fT = p[3];
- x = GetLocalConvConst();
- fC = p[4] / x;
- fE = fC*fX - p[2];
-
- c[10] /= x;
- c[11] /= x;
- c[12] /= x;
- c[13] /= x;
- c[14] /= x*x;
-
- Double_t c22 = fX*fX * c[14] - 2.0*fX*c[12] + c[ 5];
- Double_t c32 = fX * c[13] - c[ 8];
- Double_t c20 = fX * c[10] - c[ 3];
- Double_t c21 = fX * c[11] - c[ 4];
- Double_t 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];
-
- for (k = 0; k < kMAXCLUSTERSPERTRACK; k++) {
- fdQdl[k] = 0;
- //fIndex[k] = 0; //MI store indexes
- }
+
+ for (UInt_t i=0; i<kMAXCLUSTERSPERTRACK; i++) fdQdl[i] = 0;
- for (i = 0; i < 3; i++) {
- fBudget[i] = 0;
- }
- if ((t.GetStatus() & AliESDtrack::kTIME) == 0) {
- return;
- }
+ for (Int_t i=0;i<3;i++) fBudget[i]=0;
+ if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
StartTimeIntegral();
- Double_t times[10];
- t.GetIntegratedTimes(times);
- SetIntegratedTimes(times);
+ Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
SetIntegratedLength(t.GetIntegratedLength());
}
// Destructor
//
- if (fBackupTrack) {
- delete fBackupTrack;
- }
+ if (fBackupTrack) delete fBackupTrack;
fBackupTrack = 0;
}
-//____________________________________________________________________________
-AliTRDtrack &AliTRDtrack::operator=(const AliTRDtrack &t)
-{
- //
- // Assignment operator
- //
-
- fLhElectron = 0.0;
- fNWrong = 0;
- fStopped = 0;
- fNRotate = 0;
- fNExpected = 0;
- fNExpectedLast = 0;
- fNdedx = 0;
- fNCross = 0;
- fNLast = 0;
- fChi2Last = 0;
- fBackupTrack = 0;
-
- fAlpha = t.GetAlpha();
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- else if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
-
- return *this;
-
-}
-
//____________________________________________________________________________
Float_t AliTRDtrack::StatusForTOF()
{
// Defines the status of the TOF extrapolation
//
- // Definition of res ????
- Float_t res = (0.2 + 0.8 * (fN / (fNExpected + 5.0)))
- * (0.4 + 0.6 * fTracklets[5].GetN() / 20.0);
- res *= (0.25 + 0.8 * 40.0 / (40.0 + fBudget[2]));
+ Float_t res = (0.2 + 0.8*(fN/(fNExpected+5.)))*(0.4+0.6*fTracklets[5].GetN()/20.);
+ res *= (0.25+0.8*40./(40.+fBudget[2]));
return res;
- // This part of the function is never reached ????
- // What defines these parameters ????
- Int_t status = 0;
- if (GetNumberOfClusters() < 20) return 0;
- if ((fN > 110) &&
- (fChi2/(Float_t(fN)) < 3.0)) return 3; // Gold
- if ((fNLast > 30) &&
- (fChi2Last/(Float_t(fNLast)) < 3.0)) return 3; // Gold
- if ((fNLast > 20) &&
- (fChi2Last/(Float_t(fNLast)) < 2.0)) return 3; // Gold
- if ((fNLast/(fNExpectedLast+3.0) > 0.8) &&
- (fChi2Last/Float_t(fNLast) < 5.0) &&
- (fNLast > 20)) return 2; // Silver
- if ((fNLast > 5) &&
- (((fNLast+1.0)/(fNExpectedLast+1.0)) > 0.8) &&
- (fChi2Last/(fNLast-5.0) < 6.0)) return 1;
+ Int_t status=0;
+ if (GetNumberOfClusters()<20) return 0; //
+ if (fN>110&&fChi2/(Float_t(fN))<3) return 3; //gold
+ if (fNLast>30&&fChi2Last/(Float_t(fNLast))<3) return 3; //gold
+ if (fNLast>20&&fChi2Last/(Float_t(fNLast))<2) return 3; //gold
+ if (fNLast/(fNExpectedLast+3.)>0.8 && fChi2Last/Float_t(fNLast)<5&&fNLast>20) return 2; //silber
+ if (fNLast>5 &&((fNLast+1.)/(fNExpectedLast+1.))>0.8&&fChi2Last/(fNLast-5.)<6) return 1;
return status;
}
-
-//_____________________________________________________________________________
-void AliTRDtrack::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 - 2.0*fX*fCce+fCee;
- Double_t c32 = fX*fCct-fCte;
- Double_t c20 = fX*fCcy-fCey;
- Double_t c21 = fX*fCcz-fCez;
- Double_t 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 AliTRDtrack::GetCovariance(Double_t cc[15]) const
-{
- //
- // Returns the track covariance matrix
- //
-
- 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;
-
-}
//_____________________________________________________________________________
Int_t AliTRDtrack::Compare(const TObject *o) const
dedx /= (nu - nl + 1.0);
SetdEdx(dedx);
- delete [] index;
-
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho)
+Bool_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 (xk == fX) {
- return 1;
- }
-
- if (TMath::Abs(fC*xk - fE) >= 0.9) {
- return 0;
- }
+ if (xk == GetX()) return kTRUE;
- Double_t lcc = GetLocalConvConst();
+ Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
- Double_t oldX = fX;
- Double_t oldY = fY;
- Double_t oldZ = fZ;
+ Double_t bz=GetBz();
+ if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE;
- Double_t x1 = fX;
- Double_t x2 = x1 + (xk - x1);
- Double_t dx = x2 - x1;
- Double_t y1 = fY;
- Double_t z1 = fZ;
- Double_t c1 = fC*x1 - fE;
- if ((c1*c1) > 1) {
- return 0;
+ Double_t x=GetX(), y=GetY(), z=GetZ();
+ Double_t d=TMath::Sqrt((x-oldX)*(x-oldX)+(y-oldY)*(y-oldY)+(z-oldZ)*(z-oldZ));
+ if (oldX < xk)
+ if (IsStartedTimeIntegral()) {
+ Double_t l2=d;
+ Double_t crv=GetC();
+ if (TMath::Abs(l2*crv)>0.0001){
+ // make correction for curvature if neccesary
+ l2 = 0.5*TMath::Sqrt((x-oldX)*(x-oldX) + (y-oldY)*(y-oldY));
+ l2 = 2*TMath::ASin(l2*crv)/crv;
+ l2 = TMath::Sqrt(l2*l2+(z-oldZ)*(z-oldZ));
+ }
+ AddTimeStep(l2);
}
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*x2 - fE;
- if ((c2*c2) > 1) {
- return 0;
- }
+ Double_t ll = (oldX < xk) ? -d : d;
+ if (!AliExternalTrackParam::CorrectForMaterial(ll*rho/x0,x0,GetMass()))
+ return kFALSE;
- Double_t r2 = TMath::Sqrt(1.0 - 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;
- Double_t cc = c1+c2;
- Double_t 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;
- Double_t b01 = f12*fCey + f14*fCcy + f13*fCty;
- Double_t b10 = f02*fCez + f04*fCcz;
- Double_t b11 = f12*fCez + f14*fCcz + f13*fCtz;
- Double_t b20 = f02*fCee + f04*fCce;
- Double_t b21 = f12*fCee + f14*fCce + f13*fCte;
- Double_t b30 = f02*fCte + f04*fCct;
- Double_t b31 = f12*fCte + f14*fCct + f13*fCtt;
- Double_t b40 = f02*fCce + f04*fCcc;
- Double_t b41 = f12*fCce + f14*fCcc + f13*fCct;
-
- // a = f*b = f*C*ft
- Double_t a00 = f02*b20 + f04*b40;
- Double_t a01 = f02*b21 + f04*b41;
- Double_t a11 = f12*b21 + f14*b41 + f13*b31;
-
- // F*C*Ft = C + (a + b + bt)
- fCyy += a00 + 2.0*b00;
- fCzy += a01 + b01 + b10;
- fCey += b20;
- fCty += b30;
- fCcy += b40;
- fCzz += a11 + 2.0*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
- // What is 14.1 ????
- Double_t d = TMath::Sqrt((x1-fX)*(x1-fX) + (y1-fY)*(y1-fY) + (z1-fZ)*(z1-fZ));
- Double_t p2 = (1.0 + 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;
- Double_t ez = fT;
- Double_t xz = fC*ez;
- Double_t zz1 = ez*ez + 1.0;
- Double_t xy = fE + ey;
-
- fCee += (2.0*ey*ez*ez*fE + 1.0 - 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;
-
- // Energy losses
- // What is 5940.0 ???? and 0.153e-3 ????
- if ((5940.0*beta2 / (1.0 - beta2 + 1e-10) - beta2) < 0.0) {
- return 0;
- }
- Double_t dE = 0.153e-3/beta2 * (TMath::Log(5940.0*beta2 / (1.0 - beta2 + 1e-10)) - beta2)
- * d * rho;
- Float_t budget = d * rho;
- fBudget[0] +=budget;
-
- // Suspicious part - think about it ????
+ {//Energy losses************************
+ Double_t p2=(1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt());
+ Double_t beta2=p2/(p2 + GetMass()*GetMass());
+ if ((5940*beta2/(1-beta2+1e-10) - beta2) < 0) return kFALSE;
+
+ Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2+1e-10)) - beta2)*d*rho;
+ Float_t budget = d*rho;
+ fBudget[0] += budget;
+ /*
+ // suspicious part - think about it ?
Double_t kinE = TMath::Sqrt(p2);
- if (dE > 0.8 * kinE) {
- dE = 0.8 * kinE;
- }
- if (dE < 0.0) {
- dE = 0.0; // Not valid region for Bethe bloch
- }
- fDE += dE;
- if (x1 < x2) {
- dE = -dE;
- }
- cc = fC;
- fC *= (1.0 - TMath::Sqrt(p2 + GetMass()*GetMass()) / p2 * dE);
- fE += fX * (fC - cc);
-
- // Energy loss fluctuation
- // Why 0.07 ????
- Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE));
- Double_t sigmac2 = sigmade*sigmade * fC*fC * (p2 + GetMass()*GetMass()) / (p2*p2);
+ if (dE>0.8*kinE) dE = 0.8*kinE; //
+ if (dE<0) dE = 0.0; // not valid region for Bethe bloch
+ */
+ //
+ fDE+=dE;
+ /*
+ // Suspicious ! I.B.
+ Double_t sigmade = 0.07*TMath::Sqrt(TMath::Abs(dE)); // energy loss fluctuation
+ Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
fCcc += sigmac2;
- fCee += fX*fX * sigmac2;
-
- // Track time measurement
- if (x1 < x2) {
- if (IsStartedTimeIntegral()) {
- Double_t l2 = TMath::Sqrt((fX-oldX)*(fX-oldX)
- + (fY-oldY)*(fY-oldY)
- + (fZ-oldZ)*(fZ-oldZ));
- if (TMath::Abs(l2*fC) > 0.0001){
- // <ake correction for curvature if neccesary
- l2 = 0.5 * TMath::Sqrt((fX-oldX)*(fX-oldX)
- + (fY-oldY)*(fY-oldY));
- l2 = 2.0 * TMath::ASin(l2 * fC) / fC;
- l2 = TMath::Sqrt(l2*l2 + (fZ-oldZ)*(fZ-oldZ));
- }
- AddTimeStep(l2);
- }
+ fCee += fX*fX*sigmac2;
+ */
}
- return 1;
+ return kTRUE;
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq
- , UInt_t index, Double_t h01)
+Bool_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq, Int_t index,
+ Double_t h01)
{
- //
- // Assignes a found cluster to the track and updates track information
- //
+ // Assignes found cluster to the track and updates track information
Bool_t fNoTilt = kTRUE;
- // What is 0.003 ????
- if (TMath::Abs(h01) > 0.003) {
- fNoTilt = kFALSE;
- }
-
- // Add angular effect to the error contribution
- Float_t tangent2 = (fC*fX-fE) * (fC*fX-fE);
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
+ // add angular effect to the error contribution - MI
+ Float_t tangent2 = GetSnp()*GetSnp();
if (tangent2 < 0.90000){
- tangent2 = tangent2 / (1.0 - tangent2);
- }
- // What is 0.04 ????
- Float_t errang = tangent2 * 0.04;
- Float_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
-
- Double_t r00 = c->GetSigmaY2() + errang;
- Double_t r01 = 0.0;
- Double_t r11 = c->GetSigmaZ2() * 100.0;
- 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;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
-
- Double_t dy = c->GetY() - fY;
- Double_t dz = c->GetZ() - fZ;
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
-
- if (fNoTilt) {
-
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
- return 0;
- }
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fC = cur;
-
+ tangent2 = tangent2/(1.-tangent2);
}
- else {
+ //Float_t errang = tangent2*0.04; //
- // Empirical factor set by C.Xu in the first tilt version
- // Is this factor still ok ????
- Double_t xuFactor = 100.0;
- dy = c->GetY() - fY;
- dz = c->GetZ() - fZ;
- dy = dy + h01*dz;
-
- Float_t add = 0.0;
- if (TMath::Abs(dz) > padlength/2.0) {
- Float_t dy2 = c->GetY() - fY;
- Float_t sign = (dz > 0.0) ? -1.0 : 1.0;
- dy2 += h01 * sign * padlength/2.0;
- dy = dy2;
- add = 0.0;
- }
-
- r00 = c->GetSigmaY2() + errang + add;
- r01 = 0.0;
- r11 = c->GetSigmaZ2() * xuFactor;
- r00 += (fCyy + 2.0*h01*fCzy + h01*h01*fCzz);
- r01 += (fCzy + h01*fCzz);
- r11 += 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) >= 0.9) {
- 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 p[2]={c->GetY(), c->GetZ()};
+ //Double_t cov[3]={c->GetSigmaY2()+errang, 0., c->GetSigmaZ2()*100.};
+ Double_t sy2=c->GetSigmaY2()*4;
+ Double_t sz2=c->GetSigmaZ2()*4;
+ Double_t cov[3]={sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2};
- Double_t c01 = fCzy;
- Double_t c02 = fCey;
- Double_t c03 = fCty;
- Double_t c04 = fCcy;
- Double_t c12 = fCez;
- Double_t c13 = fCtz;
- Double_t c14 = fCcz;
-
- fCyy -= k00*fCyy + k01*fCzy;
- fCzy -= k00*c01 + k01*fCzz;
- fCey -= k00*c02 + k01*c12;
- fCty -= k00*c03 + k01*c13;
- fCcy -= k00*c04 + k01*c14;
-
- fCzz -= k10*c01 + k11*fCzz;
- 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;
-
- fCcc -= k40*c04 + k41*c14;
+ if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
- Int_t n = GetNumberOfClusters();
- fIndex[n] = index;
+ Int_t n=GetNumberOfClusters();
+ fIndex[n]=index;
SetNumberOfClusters(n+1);
SetChi2(GetChi2()+chisq);
- return 1;
-
+ return kTRUE;
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::UpdateMI(const AliTRDcluster *c, Double_t chisq
- , UInt_t index, Double_t h01
- , Int_t /*plane*/)
-{
- //
+Int_t AliTRDtrack::UpdateMI(const AliTRDcluster *c, Double_t chisq, Int_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
- // Still needed ????
- // AliTRDclusterCorrection *corrector = AliTRDclusterCorrection::GetCorrection();
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
+ // add angular effect to the error contribution and make correction - MI
//
-
- Double_t tangent2 = (fC*fX-fE) * (fC*fX-fE);
- if (tangent2 < 0.9) {
- tangent2 = tangent2 / (1.0 - tangent2);
- }
- Double_t tangent = TMath::Sqrt(tangent2);
- if ((fC*fX-fE) < 0.0) {
- tangent *= -1.0;
+ Double_t tangent2 = GetSnp()*GetSnp();
+ if (tangent2 < 0.90000){
+ tangent2 = tangent2/(1.-tangent2);
}
+ Double_t tangent = TMath::Sqrt(tangent2);
+ if (GetSnp()<0) tangent*=-1;
+ // Double_t correction = 0*plane;
+ /*
+ Double_t errang = tangent2*0.04; //
+ Double_t errsys =0.025*0.025*20; //systematic error part
- // Where are the parameters from ????
- Double_t errang = tangent2 * 0.04;
- Double_t errsys = 0.025*0.025 * 20.0; // Systematic error part
-
- Float_t extend = 1.0;
- if (c->GetNPads() == 4) extend = 2.0;
+ Float_t extend =1;
+ if (c->GetNPads()==4) extend=2;
+ */
+ //if (c->GetNPads()==5) extend=3;
+ //if (c->GetNPads()==6) extend=3;
+ //if (c->GetQ()<15) return 1;
- /////////////////////////////////////////////////////////////////////////////
- //
- // Is this still needed or will it be needed ????
- //
- //if (c->GetNPads() == 5) extend = 3.0;
- //if (c->GetNPads() == 6) extend = 3.0;
- //if (c->GetQ() < 15) {
- // return 1;
- //}
- //
- // Will this be needed ????
/*
- if (corrector !=0 ) {
+ if (corrector!=0){
//if (0){
correction = corrector->GetCorrection(plane,c->GetLocalTimeBin(),tangent);
if (TMath::Abs(correction)>0){
}
}
*/
- //
- // Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
- /////////////////////////////////////////////////////////////////////////////
-
- Double_t r00 = (c->GetSigmaY2() + errang + errsys) * extend;
- Double_t r01 = 0.0;
- Double_t r11 = c->GetSigmaZ2()*10000.0;
- 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;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
-
- Double_t dy = c->GetY() - fY;
- Double_t dz = c->GetZ() - fZ;
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
-
- if (fNoTilt) {
-
- if (TMath::Abs(cur*fX - eta) >= 0.9) {
- return 0;
- }
-
- fY += k00*dy + k01*dz;
- fZ += k10*dy + k11*dz;
- fE = eta;
- fC = cur;
-
- }
- else {
-
- Double_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
- // Empirical factor set by C.Xu in the first tilt version
- Double_t xuFactor = 1000.0;
-
- dy = c->GetY() - fY;
- dz = c->GetZ() - fZ;
- //dy = dy + h01*dz + correction; // Still needed ????
-
- Double_t tiltdz = dz;
- if (TMath::Abs(tiltdz) > padlength/2.0) {
- tiltdz = TMath::Sign(padlength/2.0,dz);
- }
- dy = dy + h01*tiltdz;
-
- Double_t add = 0.0;
- if (TMath::Abs(dz) > padlength/2.0) {
- //Double_t dy2 = c->GetY() - fY; // Still needed ????
- //Double_t sign = (dz>0) ? -1.: 1.;
- //dy2-=h01*sign*padlength/2.;
- //dy = dy2;
- add = 1.0;
+ //
+ //Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
+ /*
+ {
+ Double_t dy=c->GetY() - GetY(), dz=c->GetZ() - GetZ();
+ printf("%e %e %e %e\n",dy,dz,padlength/2,h01);
}
+ */
+ Double_t p[2]={c->GetY(), c->GetZ()};
+ /*
+ Double_t cov[3]={(c->GetSigmaY2()+errang+errsys)*extend, 0.,
+ c->GetSigmaZ2()*10000.};
+ */
+ Double_t sy2=c->GetSigmaY2()*4;
+ Double_t sz2=c->GetSigmaZ2()*4;
+ Double_t cov[3]={sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2};
- Double_t s00 = (c->GetSigmaY2() + errang) * extend + errsys + add; // Error pad
- Double_t s11 = c->GetSigmaZ2() * xuFactor; // 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) >= 0.9) {
- 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 the covariance matrix
- Double_t oldyy = fCyy;
- Double_t oldzz = fCzz;
- //Double_t oldee = fCee;
- //Double_t oldcc = fCcc;
- Double_t oldzy = fCzy;
- Double_t oldey = fCey;
- Double_t oldty = fCty;
- Double_t oldcy = fCcy;
- Double_t oldez = fCez;
- Double_t oldtz = fCtz;
- Double_t oldcz = fCcz;
- //Double_t oldte = fCte;
- //Double_t oldce = fCce;
- //Double_t oldct = fCct;
+ if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
- 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();
- fIndex[n] = index;
+ Int_t n=GetNumberOfClusters();
+ fIndex[n]=index;
SetNumberOfClusters(n+1);
+ SetChi2(GetChi2()+chisq);
- SetChi2(GetChi2() + chisq);
-
- return 1;
-
+ return kTRUE;
}
-
+/*
//_____________________________________________________________________________
Int_t AliTRDtrack::UpdateMI(const AliTRDtracklet &tracklet)
{
//
// Assignes found tracklet to the track and updates track information
//
-
- Double_t r00 = (tracklet.GetTrackletSigma2());
- Double_t r01 = 0.0;
- Double_t r11 = 10000.0;
- 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 r00=(tracklet.GetTrackletSigma2()), r01=0., r11= 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 dy = tracklet.GetY() - fY;
- Double_t dz = tracklet.GetZ() - fZ;
+ Double_t dy=tracklet.GetY() - fY, dz=tracklet.GetZ() - fZ;
- Double_t s00 = tracklet.GetTrackletSigma2(); // Error pad
- Double_t s11 = 100000.0; // Error pad-row
- Float_t h01 = tracklet.GetTilt();
- r00 = fCyy + fCzz*h01*h01 + s00;
- r01 = fCzy;
+ Double_t s00 = tracklet.GetTrackletSigma2(); // error pad
+ Double_t s11 = 100000; // error pad-row
+ Float_t h01 = tracklet.GetTilt();
+ //
+ // r00 = fCyy + 2*fCzy*h01 + fCzz*h01*h01+s00;
+ r00 = fCyy + fCzz*h01*h01+s00;
+ // r01 = fCzy + fCzz*h01;
+ r01 = fCzy ;
r11 = fCzz + s11;
det = r00*r11 - r01*r01;
-
- // Inverse matrix
- tmp = r00;
- r00 = r11 / det;
- r11 = tmp / det;
- r01 = -r01 / det;
-
- // K matrix
- Double_t k00 = fCyy*r00 + fCzy*r01;
- Double_t k01 = fCyy*r01 + fCzy*r11;
- Double_t k10 = fCzy*r00 + fCzz*r01;
- Double_t k11 = fCzy*r01 + fCzz*r11;
- Double_t k20 = fCey*r00 + fCez*r01;
- Double_t k21 = fCey*r01 + fCez*r11;
- Double_t k30 = fCty*r00 + fCtz*r01;
- Double_t k31 = fCty*r01 + fCtz*r11;
- Double_t k40 = fCcy*r00 + fCcz*r01;
- Double_t k41 = fCcy*r01 + fCcz*r11;
+ // inverse matrix
+ 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;
- // Update measurement
- Double_t cur = fC + k40*dy + k41*dz;
- Double_t eta = fE + k20*dy + k21*dz;
- if (TMath::Abs(cur*fX-eta) >= 0.9) {
+ // 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
+ Double_t cur=fC + k40*dy + k41*dz, eta=fE + k20*dy + k21*dz;
+ // 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;
}
+// k01+=h01*k00;
+// k11+=h01*k10;
+// k21+=h01*k20;
+// k31+=h01*k30;
+// k41+=h01*k40;
+
fY += k00*dy + k01*dz;
fZ += k10*dy + k11*dz;
fT += k30*dy + k31*dz;
fC = cur;
- // Update the covariance matrix
- Double_t oldyy = fCyy;
- Double_t oldzz = fCzz;
- //Double_t oldee = fCee;
- //Double_t oldcc = fCcc;
- Double_t oldzy = fCzy;
- Double_t oldey = fCey;
- Double_t oldty = fCty;
- Double_t oldcy = fCcy;
- Double_t oldez = fCez;
- Double_t oldtz = fCtz;
- Double_t oldcz = fCcz;
- //Double_t oldte = fCte;
- //Double_t oldce = fCce;
+
+ //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;
+ 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;
+ //
- fCcc -= k40*oldcy + k41*oldcz;
+ //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::Rotate(Double_t alpha, Bool_t absolute)
+Bool_t AliTRDtrack::Rotate(Double_t alpha, Bool_t absolute)
{
- //
- // Rotates the track parameters in the R*phi plane,
- // if the absolute rotation alpha is in global system.
- // Otherwise the rotation is relative to the current rotation angle
- //
-
+ // Rotates track parameters in R*phi plane
+ // if absolute rotation alpha is in global system
+ // otherwise alpha rotation is relative to the current rotation angle
+
if (absolute) {
- alpha -= fAlpha;
+ alpha -= GetAlpha();
}
else{
fNRotate++;
}
- fAlpha += alpha;
- if (fAlpha < -TMath::Pi()) {
- fAlpha += 2.0 * TMath::Pi();
- }
- if (fAlpha >= TMath::Pi()) {
- fAlpha -= 2.0 * TMath::Pi();
- }
-
- Double_t x1 = fX;
- Double_t y1 = fY;
- Double_t ca = TMath::Cos(alpha);
- Double_t sa = TMath::Sin(alpha);
- Double_t r1 = fC*fX - fE;
-
- fX = x1*ca + y1*sa;
- fY = -x1*sa + y1*ca;
- if ((r1*r1) > 1.0) {
- return 0;
- }
- fE = fE*ca + (fC*y1 + TMath::Sqrt(1.0 - r1*r1)) * sa;
-
- Double_t r2 = fC*fX - fE;
- if (TMath::Abs(r2) >= 0.9) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Rotation failed N = %d !\n",n));
- }
- return 0;
- }
-
- if ((r2*r2) > 1.0) {
- return 0;
- }
- Double_t y0 = fY + TMath::Sqrt(1.0 - r2*r2) / fC;
- if ((fY-y0)*fC >= 0.0) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Rotation failed N = %d !\n",n));
- }
- return 0;
- }
-
- // f = F - 1
- Double_t f00 = ca-1.0;
- Double_t f24 = (y1 - r1*x1/TMath::Sqrt(1.0 - r1*r1)) * sa;
- Double_t f20 = fC*sa;
- Double_t f22 = (ca + sa*r1/TMath::Sqrt(1.0 - r1*r1)) - 1.0;
-
- // b = C*ft
- Double_t b00 = fCyy*f00;
- Double_t b02 = fCyy*f20 + fCcy*f24 + fCey*f22;
- Double_t b10 = fCzy*f00;
- Double_t b12 = fCzy*f20 + fCcz*f24 + fCez*f22;
- Double_t b20 = fCey*f00;
- Double_t b22 = fCey*f20 + fCce*f24 + fCee*f22;
- Double_t b30 = fCty*f00;
- Double_t b32 = fCty*f20 + fCct*f24 + fCte*f22;
- Double_t b40 = fCcy*f00;
- Double_t b42 = fCcy*f20 + fCcc*f24 + fCce*f22;
-
- // a = f*b = f*C*ft
- Double_t a00 = f00*b00;
- Double_t a02 = f00*b02;
- Double_t a22 = f20*b02 + f24*b42 + f22*b22;
-
- // F*C*Ft = C + (a + b + bt)
- fCyy += a00 + 2.0*b00;
- fCzy += b10;
- fCey += a02 + b20 + b02;
- fCty += b30;
- fCcy += b40;
- fCez += b12;
- fCte += b32;
- fCee += a22 + 2.0*b22;
- fCce += b42;
-
- return 1;
+ if (GetLabel()==277)
+ printf("Rotate %e %e %e %e\n",GetAlpha(),GetX(),GetY(),GetZ());
+ return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
}
//_____________________________________________________________________________
// Returns the track chi2
//
- Bool_t fNoTilt = kTRUE;
- if (TMath::Abs(h01) > 0.003) {
- fNoTilt = kFALSE;
- }
+ Double_t p[2]={c->GetY(), c->GetZ()};
+ Double_t sy2=c->GetSigmaY2()*4;
+ Double_t sz2=c->GetSigmaZ2()*4;
+ Double_t cov[3]={sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2};
+
+ return AliExternalTrackParam::GetPredictedChi2(p,cov);
- Double_t chi2;
- Double_t dy;
- Double_t r00;
- Double_t r01;
- Double_t r11;
+ /*
+ Bool_t fNoTilt = kTRUE;
+ if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
- if (fNoTilt) {
+ return (c->GetY() - GetY())*(c->GetY() - GetY())/c->GetSigmaY2();
+ */
- dy = c->GetY() - fY;
- r00 = c->GetSigmaY2();
- chi2 = (dy*dy) / r00;
+ /*
+ Double_t chi2, dy, r00, r01, r11;
+ if(fNoTilt) {
+ dy=c->GetY() - fY;
+ r00=c->GetSigmaY2();
+ chi2 = (dy*dy)/r00;
}
else {
+ Double_t padlength = TMath::Sqrt(c->GetSigmaZ2()*12);
+ //
+ r00=c->GetSigmaY2(); r01=0.; r11=c->GetSigmaZ2();
+ r00+=fCyy; r01+=fCzy; r11+=fCzz;
- Double_t padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
-
- r00 = c->GetSigmaY2();
- r01 = 0.0;
- r11 = c->GetSigmaZ2();
- r00 += fCyy;
- r01 += fCzy;
- r11 += fCzz;
-
- Double_t det = r00*r11 - r01*r01;
+ Double_t det=r00*r11 - r01*r01;
if (TMath::Abs(det) < 1.e-10) {
- Int_t n = GetNumberOfClusters();
- if (n > 4) {
- AliError(Form("Singular matrix N = %d!\n",n));
- }
+ 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;
- Double_t dz = c->GetZ() - fZ;
+ Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
+ Double_t dy=c->GetY() - fY, dz=c->GetZ() - fZ;
Double_t tiltdz = dz;
- if (TMath::Abs(tiltdz) > padlength/2.0) {
- tiltdz = TMath::Sign(padlength/2.0,dz);
+ if (TMath::Abs(tiltdz)>padlength/2.) {
+ tiltdz = TMath::Sign(padlength/2,dz);
}
- dy = dy + h01*tiltdz;
-
- chi2 = (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz) / det;
+ // dy=dy+h01*dz;
+ dy=dy+h01*tiltdz;
+ chi2 = (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
}
return chi2;
-
+ */
}
-//_________________________________________________________________________
-void AliTRDtrack::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());
- Double_t r = fC*fX - fE;
-
- Double_t y0;
- if (r > 1) {
- py = pt;
- px = 0.0;
- }
- else if (r < -1) {
- py = -pt;
- px = 0.0;
- }
- else {
- y0 = fY + TMath::Sqrt(1.0 - 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 AliTRDtrack::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 AliTRDtrack::ResetCovariance()
-{
- //
- // Resets covariance matrix
- //
-
- fCyy *= 10.0;
- fCzy = 0.0; fCzz *= 10.0;
- fCey = 0.0; fCez = 0.0; fCee *= 10.0;
- fCty = 0.0; fCtz = 0.0; fCte = 0.0; fCtt *= 10.0;
- fCcy = 0.0; fCcz = 0.0; fCce = 0.0; fCct = 0.0; fCcc *= 10.0;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtrack::ResetCovariance(Float_t mult)
-{
- //
- // Resets covariance matrix
- //
-
- fCyy *= mult;
- fCzy *= 0.0; fCzz *= 1.0;
- fCey *= 0.0; fCez *= 0.0; fCee *= mult;
- fCty *= 0.0; fCtz *= 0.0; fCte *= 0.0; fCtt *= 1.0;
- fCcy *= 0.0; fCcz *= 0.0; fCce *= 0.0; fCct *= 0.0; fCcc *= mult;
-
-}
-
//_____________________________________________________________________________
void AliTRDtrack::MakeBackupTrack()
{
// Creates a backup track
//
- if (fBackupTrack) {
- delete fBackupTrack;
- }
-
+ if (fBackupTrack) delete fBackupTrack;
fBackupTrack = new AliTRDtrack(*this);
}
{
//
// Find prolongation at given x
- // Return 0 if it does not exist
- //
+ // return 0 if not exist
- Double_t c1 = fC*fX - fE;
- if (TMath::Abs(c1) > 1.0) {
- return 0;
- }
-
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*xk - fE;
- if (TMath::Abs(c2) > 1.0) {
- return 0;
- }
+ Double_t bz=GetBz();
- Double_t r2 = TMath::Sqrt(1.0 - c2*c2);
- y = fY + (xk-fX)*(c1+c2)/(r1+r2);
- z = fZ + (xk-fX)*(c1+c2)/(c1*r2 + c2*r1)*fT;
+ if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
+ if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;
- return 1;
-
+ return 1;
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateToX(Double_t xr, Double_t step)
+Int_t AliTRDtrack::PropagateToX(Double_t xr, Double_t step)
{
//
- // Propagate track to a given x position
- // Works inside of the 20 degree segmentation
- // (local cooordinate frame for TRD , TPC, TOF)
+ // Propagate track to given x position
+ // works inside of the 20 degree segmentation (local cooordinate frame for TRD , TPC, TOF)
//
- // The material budget is taken from the geo manager
- //
-
- Double_t xyz0[3];
- Double_t xyz1[3];
- Double_t y;
- Double_t z;
-
- // Critical alpha - cross sector indication
- const Double_t kAlphac = TMath::Pi()/9.0;
+ // material budget from geo manager
+ //
+ Double_t xyz0[3], xyz1[3],y,z;
+ const Double_t kAlphac = TMath::Pi()/9.;
const Double_t kTalphac = TMath::Tan(kAlphac*0.5);
-
- // Direction +-
- Double_t dir = (fX > xr) ? -1.0 : 1.0;
-
- for (Double_t x = fX + dir*step; dir*x < dir*xr; x += dir*step) {
-
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ // critical alpha - cross sector indication
+ //
+ Double_t dir = (GetX()>xr) ? -1.:1.;
+ // direction +-
+ for (Double_t x=GetX()+dir*step;dir*x<dir*xr;x+=dir*step){
+ //
+ GetXYZ(xyz0);
GetProlongation(x,y,z);
- xyz1[0] = x * TMath::Cos(fAlpha) + y * TMath::Sin(fAlpha);
- xyz1[1] = x * TMath::Sin(fAlpha) - y * TMath::Cos(fAlpha);
+ xyz1[0] = x*TMath::Cos(GetAlpha())+y*TMath::Sin(GetAlpha());
+ xyz1[1] = x*TMath::Sin(GetAlpha())-y*TMath::Cos(GetAlpha());
xyz1[2] = z;
Double_t param[7];
AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
-
- if ((param[0] > 0) &&
- (param[1] > 0)) {
- PropagateTo(x,param[1],param[0]);
- }
- if (fY > fX*kTalphac) {
+ //
+ if (param[0]>0&¶m[1]>0) PropagateTo(x,param[1],param[0]);
+ if (GetY()>GetX()*kTalphac){
Rotate(-kAlphac);
}
- if (fY < -fX*kTalphac) {
+ if (GetY()<-GetX()*kTalphac){
Rotate(kAlphac);
}
-
}
-
+ //
PropagateTo(xr);
return 0;
}
//_____________________________________________________________________________
-Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
+Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
{
//
- // Propagate a track to a given radial position
- // The rotation is always connected to the last track position
+ // propagate track to the radial position
+ // rotation always connected to the last track position
//
-
- Double_t xyz0[3];
- Double_t xyz1[3];
- Double_t y;
- Double_t z;
-
- // Direction +-
- Double_t radius = TMath::Sqrt(fX*fX + fY*fY);
- Double_t dir = (radius > r) ? -1.0 : 1.0;
-
- for (Double_t x = radius + dir*step; dir*x < dir*r; x += dir*step) {
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ Double_t xyz0[3], xyz1[3],y,z;
+ Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
+ Double_t dir = (radius>r) ? -1.:1.; // direction +-
+ //
+ for (Double_t x=radius+dir*step;dir*x<dir*r;x+=dir*step){
+ GetXYZ(xyz0);
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
GetProlongation(x,y,z);
- xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
- xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
+ xyz1[0] = x*TMath::Cos(alpha)+y*TMath::Sin(alpha);
+ xyz1[1] = x*TMath::Sin(alpha)-y*TMath::Cos(alpha);
xyz1[2] = z;
Double_t param[7];
AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
- if (param[1] <= 0.0) {
- param[1] = 100000000.0;
- }
+ if (param[1]<=0) param[1] =100000000;
PropagateTo(x,param[1],param[0]);
}
-
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
- GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
+ GetXYZ(xyz0);
GetProlongation(r,y,z);
- xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
- xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
+ xyz1[0] = r*TMath::Cos(alpha)+y*TMath::Sin(alpha);
+ xyz1[1] = r*TMath::Sin(alpha)-y*TMath::Cos(alpha);
xyz1[2] = z;
Double_t param[7];
AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
-
- if (param[1] <= 0.0) {
- param[1] = 100000000.0;
- }
+ //
+ if (param[1]<=0) param[1] =100000000;
PropagateTo(r,param[1],param[0]);
return 0;
// Return the current sector
//
- return Int_t(TVector2::Phi_0_2pi(fAlpha)
+ return Int_t(TVector2::Phi_0_2pi(GetAlpha())
/ AliTRDgeometry::GetAlpha())
% AliTRDgeometry::kNsect;
}
-//_____________________________________________________________________________
-Double_t AliTRDtrack::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 1.0 / kMostProbableMomentum
- / TMath::Sqrt(1.0 + GetTgl()*GetTgl());
- }
-
- return (TMath::Sign(1.0e-9,fC) + fC) * GetLocalConvConst();
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtrack::GetP() const
-{
- //
- // Returns the total momentum
- //
-
- return TMath::Abs(GetPt()) * TMath::Sqrt(1.0 + GetTgl()*GetTgl());
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtrack::GetYat(Double_t xk) const
-{
- //
- // This function calculates the Y-coordinate of a track at
- // the plane x = xk.
- // Needed for matching with the TOF (I.Belikov)
- //
-
- Double_t c1 = fC*fX - fE;
- Double_t r1 = TMath::Sqrt(1.0 - c1*c1);
- Double_t c2 = fC*xk - fE;
- Double_t r2 = TMath::Sqrt(1.0- c2*c2);
-
- return fY + (xk-fX)*(c1+c2)/(r1+r2);
-
-}
-
//_____________________________________________________________________________
void AliTRDtrack::SetSampledEdx(Float_t q, Int_t i)
{
Double_t s = GetSnp();
Double_t t = GetTgl();
-
- q *= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
+ q *= TMath::Sqrt((1-s*s)/(1+t*t));
fdQdl[i] = q;
}
Double_t s = GetSnp();
Double_t t = GetTgl();
-
- q*= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
+ q*= TMath::Sqrt((1-s*s)/(1+t*t));
fdQdl[fNdedx] = q;
fNdedx++;
}
-//_____________________________________________________________________________
-void AliTRDtrack::GetXYZ(Float_t r[3]) const
-{
+Double_t AliTRDtrack::GetBz() const {
//
- // Returns the position of the track in the global coord. system
+ // returns Bz component of the magnetic field (kG)
//
+ if (AliTracker::UniformField()) return AliTracker::GetBz();
+ Double_t r[3]; GetXYZ(r);
+ return AliTracker::GetBz(r);
+}
- Double_t cs = TMath::Cos(fAlpha);
- Double_t sn = TMath::Sin(fAlpha);
- r[0] = fX*cs - fY*sn;
- r[1] = fX*sn + fY*cs;
- r[2] = fZ;
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff