* Author: The ALICE Off-line Project. *
* Contributors are mentioned in the code where appropriate. *
* *
- * Permission to use, copy, modify and distribute this software and its *
+ * Permission to use , copy, modify and distribute this software and its *
* documentation strictly for non-commercial purposes is hereby granted *
* without fee, provided that the above copyright notice appears in all *
* copies and that both the copyright notice and this permission notice *
/* $Id$ */
#include <Riostream.h>
+
#include <TMath.h>
#include <TVector2.h>
#include "AliTracker.h"
#include "AliESDtrack.h"
+
#include "AliTRDgeometry.h"
#include "AliTRDcluster.h"
#include "AliTRDtrack.h"
#include "AliTRDtracklet.h"
+// A. Bercuci - used for PID calculations
+#include "AliTRDcalibDB.h"
+#include "Cal/AliTRDCalPID.h"
+
ClassImp(AliTRDtrack)
///////////////////////////////////////////////////////////////////////////////
// //
///////////////////////////////////////////////////////////////////////////////
-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::AliTRDtrack()
+ :AliKalmanTrack()
+ ,fSeedLab(-1)
+ ,fdEdx(0)
+ ,fDE(0)
+ ,fClusterOwner(kFALSE)
+ ,fStopped(kFALSE)
+ ,fLhElectron(0)
+ ,fNWrong(0)
+ ,fNRotate(0)
+ ,fNCross(0)
+ ,fNExpected(0)
+ ,fNLast(0)
+ ,fNExpectedLast(0)
+ ,fNdedx(0)
+ ,fChi2Last(1e10)
+ ,fBackupTrack(0x0)
{
- for (Int_t i=0; i<kNplane; i++) {
- for (Int_t j=0; j<kNslice; j++) {
- fdEdxPlane[i][j] = 0;
+ //
+ // AliTRDtrack default constructor
+ //
+
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
+ fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
}
- for (UInt_t i=0; i<kMAXCLUSTERSPERTRACK; i++) {
- fIndex[i] = 0;
+
+ for (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fIndex[i] = 0;
fIndexBackup[i] = 0;
- fdQdl[i] = 0;
+ fdQdl[i] = 0;
+ fClusters[i] = 0x0;
+ }
+
+ for (Int_t i = 0; i < 3; i++) {
+ fBudget[i] = 0;
}
- for (Int_t i=0; i<3; i++) fBudget[i] = 0;
+
}
//_____________________________________________________________________________
-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::AliTRDtrack(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)
+ ,fDE(0)
+ ,fClusterOwner(kFALSE)
+ ,fStopped(kFALSE)
+ ,fLhElectron(0)
+ ,fNWrong(0)
+ ,fNRotate(0)
+ ,fNCross(0)
+ ,fNExpected(0)
+ ,fNLast(0)
+ ,fNExpectedLast(0)
+ ,fNdedx(0)
+ ,fChi2Last(1e10)
+ ,fBackupTrack(0x0)
{
- //-----------------------------------------------------------------
- // 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
- };
+ //
+ // The main AliTRDtrack constructor.
+ //
- Set(x,alpha,pp,cc);
+ Double_t cnv = 1.0 / (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];
+ Double_t c21 = x*cov[11] - cov[ 4];
+ Double_t 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);
SetNumberOfClusters(1);
- fIndex[0]=index;
+ fIndex[0] = index;
+ fClusters[0] = c;
- for (Int_t i=0;i<kNplane;i++){
- for (Int_t j=0; j<kNslice; j++) {
- fdEdxPlane[i][j] = 0;
+ for (Int_t i = 0; i < kNplane; i++) {
+ for (Int_t j = 0; j < kNslice; j++) {
+ fdEdxPlane[i][j] = 0.0;
}
fTimBinPlane[i] = -1;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
}
Double_t q = TMath::Abs(c->GetQ());
- Double_t s = GetSnp(), t=GetTgl();
- if(s*s < 1) q *= TMath::Sqrt((1-s*s)/(1+t*t));
+ Double_t s = GetSnp();
+ Double_t t = GetTgl();
+ if (s*s < 1) {
+ q *= TMath::Sqrt((1-s*s)/(1+t*t));
+ }
+
+ fdQdl[0] = q;
+ for (UInt_t i = 1; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
+ }
- 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;
}
- for (Int_t i=0;i<3;i++) fBudget[i]=0;
+
}
//_____________________________________________________________________________
-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)
+AliTRDtrack::AliTRDtrack(const AliTRDtrack &t/*, const Bool_t owner*/)
+ :AliKalmanTrack(t)
+ ,fSeedLab(t.GetSeedLabel())
+ ,fdEdx(t.fdEdx)
+ ,fDE(t.fDE)
+ ,fClusterOwner(kTRUE)
+ ,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.
//
- for (Int_t i=0;i<kNplane;i++){
- for (Int_t 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];
+ fMom[i] = t.fMom[i];
+ fSnp[i] = t.fSnp[i];
+ fTgl[i] = t.fTgl[i];
}
- Int_t n=t.GetNumberOfClusters();
+ 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 (Int_t i = 0; i < n; i++) {
+ fIndex[i] = t.fIndex[i];
+ fIndexBackup[i] = t.fIndex[i];
+ fdQdl[i] = t.fdQdl[i];
+ if (fClusterOwner && t.fClusters[i]) {
+ fClusters[i] = new AliTRDcluster(*(t.fClusters[i]));
+ }
+ else {
+ fClusters[i] = t.fClusters[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 (UInt_t i = n; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
}
- for (Int_t i=0;i<3;i++) fBudget[i]=t.fBudget[i];
+
+ 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()),
- 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)
+AliTRDtrack::AliTRDtrack(const AliKalmanTrack &t, Double_t /*alpha*/)
+ :AliKalmanTrack(t)
+ ,fSeedLab(-1)
+ ,fdEdx(t.GetPIDsignal())
+ ,fDE(0)
+ ,fClusterOwner(kFALSE)
+ ,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 .
+ // Constructor from AliTPCtrack or AliITStrack
//
SetLabel(t.GetLabel());
- SetChi2(0.);
+ SetChi2(0.0);
SetMass(t.GetMass());
SetNumberOfClusters(0);
- for (Int_t i=0;i<kNplane;i++){
- for (Int_t 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;
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 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 (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fIndex[i] = 0;
+ fIndexBackup[i] = 0;
+ fClusters[i] = 0x0;
}
- for (Int_t 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()),
- 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::AliTRDtrack(const AliESDtrack &t)
+ :AliKalmanTrack()
+ ,fSeedLab(-1)
+ ,fdEdx(t.GetTRDsignal())
+ ,fDE(0)
+ ,fClusterOwner(kFALSE)
+ ,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
//
+
SetLabel(t.GetLabel());
- SetChi2(0.);
+ SetChi2(0.0);
SetMass(t.GetMass());
SetNumberOfClusters(t.GetTRDclusters(fIndex));
Int_t ncl = t.GetTRDclusters(fIndexBackup);
- for (UInt_t i=ncl;i<kMAXCLUSTERSPERTRACK;i++) {
- fIndexBackup[i]=0;
- fIndex[i] = 0; //MI store indexes
+ for (UInt_t i = ncl; i < kMAXCLUSTERSPERTRACK; i++) {
+ fIndexBackup[i] = 0;
+ fIndex[i] = 0;
}
- for (Int_t i=0;i<kNplane;i++){
- for (Int_t 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);
+ fMom[i] = -1.;
+ fSnp[i] = 0.;
+ fTgl[i] = 0.;
}
-
- const AliExternalTrackParam *par=&t;
- if (t.GetStatus()&AliESDtrack::kTRDbackup) {
- par=t.GetOuterParam();
- if (!par) {AliError("***** No backup info !!! ****"); par=&t;}
+ 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());
-
- for (UInt_t i=0; i<kMAXCLUSTERSPERTRACK; i++) fdQdl[i] = 0;
+ for (UInt_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
+ fdQdl[i] = 0;
+ fClusters[i] = 0x0;
+ }
- for (Int_t i=0;i<3;i++) fBudget[i]=0;
+ for (Int_t i = 0; i < 3; i++) {
+ fBudget[i] = 0;
+ }
+
+ if ((t.GetStatus() & AliESDtrack::kTIME) == 0) {
+ return;
+ }
- 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;
- fBackupTrack = 0;
+ if (fBackupTrack) {
+ delete fBackupTrack;
+ }
+ fBackupTrack = 0x0;
+ if (fClusterOwner) {
+ UInt_t icluster = 0;
+ while ((icluster < kMAXCLUSTERSPERTRACK) && fClusters[icluster]) {
+ delete fClusters[icluster];
+ fClusters[icluster] = 0x0;
+ icluster++;
+ }
+ }
}
// Defines the status of the TOF extrapolation
//
- 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]));
+ // 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]));
return res;
- 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;
+ // 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)) 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) > 0.8) &&
+ // (fChi2Last/Float_t(fNLast) < 5) &&
+ // (fNLast > 20)) return 2; // Silver
+ //if ((fNLast > 5) &&
+ // (((fNLast+1.0)/(fNExpectedLast+1.0)) > 0.8) &&
+ // (fChi2Last/(fNLast-5.0) < 6)) return 1;
+ //
+ //return status;
}
//
AliTRDtrack *t = (AliTRDtrack *) o;
- // Double_t co=t->GetSigmaY2();
- // Double_t c =GetSigmaY2();
Double_t co = TMath::Abs(t->GetC());
Double_t c = TMath::Abs(GetC());
// Calculates the truncated dE/dx within the "low" and "up" cuts.
//
- Int_t i = 0;
-
// Array to sort the dEdx values according to amplitude
Float_t sorted[kMAXCLUSTERSPERTRACK];
+ fdEdx = 0.;
+
+ // Require at least 10 clusters for a dedx measurement
+ if (fNdedx < 10) return;
- // Number of clusters used for dedx
- Int_t nc = fNdedx;
+ // Can fdQdl be negative ????
+ for (Int_t i = 0; i < fNdedx; i++) {
+ sorted[i] = TMath::Abs(fdQdl[i]);
+ }
+ // Sort the dedx values by amplitude
+ Int_t *index = new Int_t[fNdedx];
+ TMath::Sort(fNdedx, sorted, index, kFALSE);
+
+ // Sum up the truncated charge between lower and upper bounds
+ Int_t nl = Int_t(low * fNdedx);
+ Int_t nu = Int_t( up * fNdedx);
+ for (Int_t i = nl; i <= nu; i++) {
+ fdEdx += sorted[index[i]];
+ }
+ fdEdx /= (nu - nl + 1.0);
- // Require at least 10 clusters for a dedx measurement
- if (nc < 10) {
- SetdEdx(0);
- return;
+ delete[] index;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDtrack::CookdEdxTimBin(const Int_t/* tid*/)
+{
+ //
+ // Set fdEdxPlane and fTimBinPlane and also get the
+ // Time bin for Max. Cluster
+ //
+ // Authors:
+ // Prashant Shukla (shukla@physi.uni-heidelberg.de)
+ // Alexandru Bercuci (A.Bercuci@gsi.de)
+ //
+
+ Double_t maxcharge[AliESDtrack::kNPlane]; // max charge in chamber
+ // Number of clusters attached to track per chamber and slice
+ Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
+ // Number of time bins in chamber
+ Int_t ntb = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
+ Int_t plane; // Plane of current cluster
+ Int_t tb; // Time bin of current cluster
+ Int_t slice; // Current slice
+ AliTRDcluster *cluster = 0x0; // Pointer to current cluster
+
+ // Reset class and local counters/variables
+ for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
+ fTimBinPlane[iPlane] = -1;
+ maxcharge[iPlane] = 0.;
+ for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
+ fdEdxPlane[iPlane][iSlice] = 0.;
+ nCluster[iPlane][iSlice] = 0;
+ }
}
- // Lower and upper bound
- Int_t nl = Int_t(low * nc);
- Int_t nu = Int_t( up * nc);
+ // Start looping over clusters attached to this track
+ for (Int_t iClus = 0; iClus < GetNumberOfClusters(); iClus++) {
- // Can fdQdl be negative ????
- for (i = 0; i < nc; i++) {
- sorted[i] = TMath::Abs(fdQdl[i]);
+ cluster = fClusters[iClus]; //(AliTRDcluster*)tracker->GetCluster(fIndex[iClus]);
+ if(!cluster) continue;
+
+ // Read info from current cluster
+ plane = AliTRDgeometry::GetPlane(cluster->GetDetector());
+ if (plane < 0 || plane >= AliESDtrack::kNPlane) {
+ AliError(Form("Wrong plane %d", plane));
+ continue;
+ }
+
+ tb = cluster->GetLocalTimeBin();
+ if ((tb == 0) || (tb >= ntb)) {
+ AliWarning(Form("time bin 0 or > %d in cluster %d", ntb, iClus));
+ AliInfo(Form("dQ/dl %f", fdQdl[iClus]));
+ continue;
+ }
+
+ slice = tb * AliESDtrack::kNSlice / ntb;
+
+ fdEdxPlane[plane][slice] += fdQdl[iClus];
+ if (fdQdl[iClus] > maxcharge[plane]) {
+ maxcharge[plane] = fdQdl[iClus];
+ fTimBinPlane[plane] = tb;
+ }
+
+ nCluster[plane][slice]++;
+
+ } // End of loop over cluster
+
+ // Normalize fdEdxPlane to number of clusters and set track segments
+ for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
+ for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
+ if (nCluster[iPlane][iSlice]) {
+ fdEdxPlane[iPlane][iSlice] /= nCluster[iPlane][iSlice];
+ }
+ }
}
- // Sort the dedx values by amplitude
- Int_t *index = new Int_t[nc];
- TMath::Sort(nc,sorted,index,kFALSE);
+}
+
+//_____________________________________________________________________________
+void AliTRDtrack::CookdEdxNN(Float_t *dedx){
+
+ // This function calcuates the input for the neural networks
+ // which are used for the PID.
+
+ Int_t ntb = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();//number of time bins in chamber
+ Int_t plane; // plane of current cluster
+ Int_t tb; // time bin of current cluster
+ Int_t slice; // curent slice
+ AliTRDcluster *cluster = 0x0; // pointer to current cluster
+ const Int_t lMLPscale = 16000; // scaling of the MLP input to be smaller than 1
+
+ // Reset class and local contors/variables
+ for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++){
+ for (Int_t iSlice = 0; iSlice < kNMLPslice; iSlice++) {
+ *(dedx + (kNMLPslice * iPlane) + iSlice) = 0.;
+ }
+ }
+
+ // start looping over clusters attached to this track
+ for (Int_t iClus = 0; iClus < GetNumberOfClusters(); iClus++) {
+ cluster = fClusters[iClus]; //(AliTRDcluster*)tracker->GetCluster(fIndex[iClus]);
+ if(!cluster) continue;
+
+ // Read info from current cluster
+ plane = AliTRDgeometry::GetPlane(cluster->GetDetector());
+ if (plane < 0 || plane >= AliESDtrack::kNPlane) {
+ AliError(Form("Wrong plane %d", plane));
+ continue;
+ }
+
+ tb = cluster->GetLocalTimeBin();
+ if(tb == 0 || tb >= ntb){
+ AliWarning(Form("time bin 0 or > %d in cluster %d", ntb, iClus));
+ AliInfo(Form("dQ/dl %f", fdQdl[iClus]));
+ continue;
+ }
+
+ slice = tb * kNMLPslice / ntb;
+
+ *(dedx+(kNMLPslice * plane) + slice) += fdQdl[iClus]/lMLPscale;
+ } // End of loop over cluster
+
+}
+
+
+//_____________________________________________________________________________
+void AliTRDtrack::SetTrackSegmentDirMom(const Int_t plane)
+{
+ //
+ // Set the momenta for a track segment in a given plane
+ //
- // Sum up the truncated charge between nl and nu
- Float_t dedx = 0.0;
- for (i = nl; i <= nu; i++) {
- dedx += sorted[index[i]];
+ if ((plane < 0) ||
+ (plane>= kNplane)) {
+ AliError(Form("Trying to access out of range plane (%d)", plane));
+ return;
}
- dedx /= (nu - nl + 1.0);
- SetdEdx(dedx);
+
+ fSnp[plane] = GetSnp();
+ fTgl[plane] = GetTgl();
+ Double_t p[3];
+ GetPxPyPz(p);
+ fMom[plane] = TMath::Sqrt(p[0]*p[0] + p[1]*p[1] + p[2]*p[2]);
-}
+}
+
+//_____________________________________________________________________________
+Float_t AliTRDtrack::GetTrackLengthPlane(Int_t plane) const
+{
+ //
+ // Calculate the track length of a track segment in a given plane
+ //
+
+ if ((plane < 0) || (plane >= kNplane)) return 0.;
+
+ return (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())
+ / TMath::Sqrt((1.0 - fSnp[plane]*fSnp[plane])
+ / (1.0 + fTgl[plane]*fTgl[plane]));
+
+}
//_____________________________________________________________________________
-Bool_t AliTRDtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho)
+Bool_t AliTRDtrack::CookPID(Int_t &pidQuality)
{
- // 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 == GetX()) return kTRUE;
-
- Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ();
-
- Double_t bz=GetBz();
- if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE;
-
- 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));
+ //
+ // This function calculates the PID probabilities based on TRD signals
+ //
+ // The method produces probabilities based on the charge
+ // and the position of the maximum time bin in each layer.
+ // The dE/dx information can be used as global charge or 2 to 3
+ // slices. Check AliTRDCalPID and AliTRDCalPIDRefMaker for the actual
+ // implementation.
+ //
+ // Author
+ // Alex Bercuci (A.Bercuci@gsi.de) 2nd May 2007
+ //
+
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliError("No access to calibration data");
+ return kFALSE;
+ }
+
+ // Retrieve the CDB container class with the probability distributions
+ const AliTRDCalPID *pd = calibration->GetPIDObject(fPIDmethod == kNN ? 0 : 1);
+ if (!pd) {
+ AliError("No access to AliTRDCalPID");
+ return kFALSE;
+ }
+
+ // Calculate the input for the NN if fPIDmethod is kNN
+ Float_t ldEdxNN[AliTRDCalPID::kNPlane * kNMLPslice], *dedx = 0x0;
+ if(fPIDmethod == kNN) {
+ CookdEdxNN(&ldEdxNN[0]);
+ }
+
+ // Sets the a priori probabilities
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
+ fPID[ispec] = 1./AliPID::kSPECIES;
+ }
+
+
+ if(AliPID::kSPECIES != 5){
+ AliError("Probabilities array defined only for 5 values. Please modify !!");
+ return kFALSE;
+ }
+
+
+ pidQuality = 0;
+ Float_t length; // track segment length in chamber
+
+ // Skip tracks which have no TRD signal at all
+ if (fdEdx == 0.) return kFALSE;
+
+ for (Int_t iPlane = 0; iPlane < AliTRDgeometry::kNplan; iPlane++) {
+
+ length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/TMath::Sqrt((1. - fSnp[iPlane]*fSnp[iPlane]) / (1. + fTgl[iPlane]*fTgl[iPlane]));
+
+ // check data
+ if((fdEdxPlane[iPlane][0] + fdEdxPlane[iPlane][1] + fdEdxPlane[iPlane][2]) <= 0.
+ || fTimBinPlane[iPlane] == -1.) continue;
+
+ // this track segment has fulfilled all requierments
+ pidQuality++;
+
+ // Get the probabilities for the different particle species
+ for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) {
+ switch(fPIDmethod){
+ case kLQ:
+ dedx = fdEdxPlane[iPlane];
+ break;
+ case kNN:
+ dedx = &ldEdxNN[iPlane*kNMLPslice];
+ break;
+ }
+ fPID[iSpecies] *= pd->GetProbability(iSpecies, fMom[iPlane], dedx, length, iPlane);
}
- AddTimeStep(l2);
}
+ if(pidQuality == 0) return kTRUE;
- Double_t ll = (oldX < xk) ? -d : d;
- if (!AliExternalTrackParam::CorrectForMaterial(ll*rho/x0,x0,GetMass()))
- return kFALSE;
+ // normalize probabilities
+ Double_t probTotal = 0.;
+ for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) probTotal += fPID[iSpecies];
+
+ if(probTotal <= 0.) {
+ AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference histograms.");
+ return kFALSE;
+ }
+ for(Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
+
+ return kTRUE;
+}
- {//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) dE = 0.0; // not valid region for Bethe bloch
- */
+//_____________________________________________________________________________
+Bool_t AliTRDtrack::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
+{
//
- 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;
- */
+ // Propagates this track to a reference plane defined by "xk" [cm]
+ // correcting for the mean crossed material.
+ //
+ // "xx0" - thickness/rad.length [units of the radiation length]
+ // "xrho" - thickness*density [g/cm^2]
+ //
+
+ if (xk == GetX()) {
+ return kTRUE;
+ }
+
+ Double_t oldX = GetX();
+ Double_t oldY = GetY();
+ Double_t oldZ = GetZ();
+
+ Double_t bz = GetBz();
+
+ if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
+ return kFALSE;
+ }
+
+ Double_t x = GetX();
+ Double_t y = GetY();
+ Double_t z = GetZ();
+
+ if (oldX < xk) {
+ xrho = -xrho;
+ if (IsStartedTimeIntegral()) {
+ Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX) + (y-oldY)*(y-oldY) + (z-oldZ)*(z-oldZ));
+ 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 = 2.0 * TMath::ASin(l2 * crv) / crv;
+ l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ));
+ }
+ AddTimeStep(l2);
+ }
+ }
+
+ if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) {
+ return kFALSE;
+ }
+
+ {
+
+ // Energy losses************************
+ Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
+ Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
+ if (beta2<1.0e-10 || (5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0) {
+ return kFALSE;
+ }
+
+ Double_t dE = 0.153e-3 / beta2
+ * (log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
+ * xrho;
+ fBudget[0] += xrho;
+
+ /*
+ // Suspicious part - think about it ?
+ 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
+ */
+
+ 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;
+ */
+
}
return kTRUE;
}
//_____________________________________________________________________________
-Bool_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq, Int_t index,
- Double_t h01)
+Bool_t AliTRDtrack::Update(const AliTRDcluster *c, Double_t chisq, Int_t index
+ , Double_t h01)
{
+ //
// 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 - MI
+ 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.-tangent2);
+ if (tangent2 < 0.90000) {
+ tangent2 = tangent2 / (1.0 - tangent2);
}
- //Float_t errang = tangent2*0.04; //
+ //Float_t errang = tangent2 * 0.04;
- 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 p[2] = {c->GetY(), c->GetZ() };
+ //Double_t cov[3] = {c->GetSigmaY2()+errang, 0.0, c->GetSigmaZ2()*100.0 };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2 };
- if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
+ 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 kTRUE;
-}
+ return kTRUE;
+
+}
//_____________________________________________________________________________
-Int_t AliTRDtrack::UpdateMI(const AliTRDcluster *c, Double_t chisq, Int_t index, Double_t h01, Int_t /*plane*/) {
+Int_t AliTRDtrack::UpdateMI(AliTRDcluster *c, Double_t chisq, Int_t index
+ , Double_t h01, Int_t /*plane*/, Int_t tid)
+{
+ //
// 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
- //
+ if (TMath::Abs(h01) > 0.003) {
+ fNoTilt = kFALSE;
+ }
+
+ // Add angular effect to the error contribution and make correction - MI
Double_t tangent2 = GetSnp()*GetSnp();
if (tangent2 < 0.90000){
- tangent2 = tangent2/(1.-tangent2);
+ tangent2 = tangent2 / (1.0-tangent2);
}
Double_t tangent = TMath::Sqrt(tangent2);
- if (GetSnp()<0) tangent*=-1;
+ if (GetSnp() < 0) {
+ tangent *= -1;
+ }
+
+ //
+ // Is the following still needed ????
+ //
+
// Double_t correction = 0*plane;
/*
Double_t errang = tangent2*0.04; //
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};
- if (!AliExternalTrackParam::Update(p,cov)) return kFALSE;
+ Double_t p[2] = { c->GetY(), c->GetZ() };
+ //Double_t cov[3]={ (c->GetSigmaY2()+errang+errsys)*extend, 0.0, c->GetSigmaZ2()*10000.0 };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2 };
+
+ if (!AliExternalTrackParam::Update(p,cov)) {
+ return kFALSE;
+ }
- Int_t n=GetNumberOfClusters();
- fIndex[n]=index;
+ // Register cluster to track
+ Int_t n = GetNumberOfClusters();
+ fIndex[n] = index;
+ fClusters[n] = c;
SetNumberOfClusters(n+1);
- SetChi2(GetChi2()+chisq);
+ SetChi2(GetChi2() + chisq);
+
+ return kTRUE;
- return kTRUE;
}
-/*
-//_____________________________________________________________________________
-Int_t AliTRDtrack::UpdateMI(const AliTRDtracklet &tracklet)
-{
- //
- // Assignes found tracklet to the track and updates track information
- //
- //
- 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, dz=tracklet.GetZ() - fZ;
+// //_____________________________________________________________________________
+// Int_t AliTRDtrack::UpdateMI(const AliTRDtracklet &tracklet)
+// {
+// //
+// // Assignes found tracklet to the track and updates track information
+// //
+// // Can this be removed ????
+// //
+//
+// 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, dz=tracklet.GetZ() - fZ;
- 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;
-
- 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;
+// 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;
+
+// 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;
- // 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;
- fE = eta;
- fT += k30*dy + k31*dz;
- fC = cur;
+// // 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;
+// fE = eta;
+// fT += k30*dy + k31*dz;
+// fC = cur;
- //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;
- //
+// //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();
- //fIndex[n]=index;
- //SetNumberOfClusters(n+1);
+// //Int_t n=GetNumberOfClusters();
+// //fIndex[n]=index;
+// //SetNumberOfClusters(n+1);
- //SetChi2(GetChi2()+chisq);
- // cerr<<"in update: fIndex["<<fN<<"] = "<<index<<endl;
+// //SetChi2(GetChi2()+chisq);
+// // cerr<<"in update: fIndex["<<fN<<"] = "<<index<<endl;
- return 1;
+// return 1;
-}
-*/
+// }
//_____________________________________________________________________________
Bool_t AliTRDtrack::Rotate(Double_t alpha, Bool_t absolute)
{
+ //
// 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 -= GetAlpha();
}
}
return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
+
}
//_____________________________________________________________________________
// Returns the track chi2
//
- 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};
+ Double_t p[2] = { c->GetY(), c->GetZ() };
+ Double_t sy2 = c->GetSigmaY2() * 4.0;
+ Double_t sz2 = c->GetSigmaZ2() * 4.0;
+ Double_t cov[3] = { sy2 + h01*h01*sz2, h01*(sy2-sz2), sz2 + h01*h01*sy2 };
return AliExternalTrackParam::GetPredictedChi2(p,cov);
+ //
+ // Can the following be removed ????
+ //
/*
Bool_t fNoTilt = kTRUE;
if(TMath::Abs(h01) > 0.003) fNoTilt = kFALSE;
return chi2;
*/
-}
+
+}
//_____________________________________________________________________________
void AliTRDtrack::MakeBackupTrack()
// Creates a backup track
//
- if (fBackupTrack) delete fBackupTrack;
+ if (fBackupTrack) {
+ delete fBackupTrack;
+ }
fBackupTrack = new AliTRDtrack(*this);
}
Int_t AliTRDtrack::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
{
//
- // Find prolongation at given x
- // return 0 if not exist
-
- Double_t bz=GetBz();
+ // Find a prolongation at given x
+ // Return 0 if it does not exist
+ //
+
+ Double_t bz = GetBz();
- if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
- if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;
+ if (!AliExternalTrackParam::GetYAt(xk,bz,y)) {
+ return 0;
+ }
+ if (!AliExternalTrackParam::GetZAt(xk,bz,z)) {
+ return 0;
+ }
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 given x position
- // works inside of the 20 degree segmentation (local cooordinate frame for TRD , TPC, TOF)
+ // Works inside of the 20 degree segmentation
+ // (local cooordinate frame for TRD , TPC, TOF)
//
- // material budget from geo manager
+ // Material budget from geo manager
//
- Double_t xyz0[3], xyz1[3],y,z;
- const Double_t kAlphac = TMath::Pi()/9.;
+
+ Double_t xyz0[3];
+ Double_t xyz1[3];
+ Double_t y;
+ Double_t z;
+
+ const Double_t kAlphac = TMath::Pi()/9.0;
const Double_t kTalphac = TMath::Tan(kAlphac*0.5);
- // 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){
- //
+
+ // Critical alpha - cross sector indication
+ Double_t dir = (GetX() > xr) ? -1.0 : 1.0;
+
+ // 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(GetAlpha())+y*TMath::Sin(GetAlpha());
- xyz1[1] = x*TMath::Sin(GetAlpha())-y*TMath::Cos(GetAlpha());
+ 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&¶m[1]>0) PropagateTo(x,param[1],param[0]);
- if (GetY()>GetX()*kTalphac){
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+
+ if ((param[0] > 0) &&
+ (param[1] > 0)) {
+ PropagateTo(x,param[1],param[0]*param[4]);
+ }
+
+ if (GetY() > GetX()*kTalphac) {
Rotate(-kAlphac);
}
- if (GetY()<-GetX()*kTalphac){
- Rotate(kAlphac);
+ if (GetY() < -GetX()*kTalphac) {
+ Rotate( kAlphac);
}
+
}
- //
+
PropagateTo(xr);
return 0;
Int_t AliTRDtrack::PropagateToR(Double_t r,Double_t step)
{
//
- // propagate track to the radial position
- // rotation 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], xyz1[3],y,z;
+
+ Double_t xyz0[3];
+ Double_t xyz1[3];
+ Double_t y;
+ Double_t 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){
+ // Direction +-
+ Double_t dir = (radius > r) ? -1.0 : 1.0;
+
+ 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);
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) param[1] =100000000;
- PropagateTo(x,param[1],param[0]);
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+ if (param[1] <= 0) {
+ param[1] = 100000000;
+ }
+ PropagateTo(x,param[1],param[0]*param[4]);
+
}
+
GetXYZ(xyz0);
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
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) param[1] =100000000;
- PropagateTo(r,param[1],param[0]);
+ AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
+
+ if (param[1] <= 0) {
+ param[1] = 100000000;
+ }
+ PropagateTo(r,param[1],param[0]*param[4]);
return 0;
// Return the current sector
//
- return Int_t(TVector2::Phi_0_2pi(GetAlpha())
- / AliTRDgeometry::GetAlpha())
+ return Int_t(TVector2::Phi_0_2pi(GetAlpha()) / AliTRDgeometry::GetAlpha())
% AliTRDgeometry::kNsect;
}
Double_t s = GetSnp();
Double_t t = GetTgl();
- q *= TMath::Sqrt((1-s*s)/(1+t*t));
+ q *= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
fdQdl[i] = q;
}
- //_____________________________________________________________________________
+//_____________________________________________________________________________
void AliTRDtrack::SetSampledEdx(Float_t q)
{
//
Double_t s = GetSnp();
Double_t t = GetTgl();
- q*= TMath::Sqrt((1-s*s)/(1+t*t));
+ q *= TMath::Sqrt((1.0 - s*s) / (1.0 + t*t));
fdQdl[fNdedx] = q;
fNdedx++;
}
-Double_t AliTRDtrack::GetBz() const {
+//_____________________________________________________________________________
+Double_t AliTRDtrack::GetBz() const
+{
//
- // returns Bz component of the magnetic field (kG)
+ // Returns Bz component of the magnetic field (kG)
//
- if (AliTracker::UniformField()) return AliTracker::GetBz();
- Double_t r[3]; GetXYZ(r);
- return AliTracker::GetBz(r);
-}
+ if (AliTracker::UniformField()) {
+ return AliTracker::GetBz();
+ }
+ Double_t r[3];
+ GetXYZ(r);
+ return AliTracker::GetBz(r);
+
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff