// ITS Track Class
//
// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-------------------------------------------------------------------------
-
-/*****************************************************************************
- * December 18, 2000 *
- * Internal view of the ITS track parametrisation as well as the order of *
- * track parameters are subject for possible changes ! *
- * Use GetExternalParameters() and GetExternalCovariance() to access ITS *
- * track information regardless of its internal representation. *
- * This formation is now fixed in the following way: *
- * external param0: local Y-coordinate of a track (cm) *
- * external param1: local Z-coordinate of a track (cm) *
- * external param2: local sine of the track momentum azimuthal angle *
- * external param3: tangent of the track momentum dip angle *
- * external param4: 1/pt (1/(GeV/c)) *
- *****************************************************************************/
-
#include <AliKalmanTrack.h>
+#include "AliITSRecoParam.h"
+#include "AliITSgeomTGeo.h"
-#include "AliITSrecoV2.h"
+/* $Id$ */
-class AliTPCtrack;
+class AliESDtrack;
+class AliESDVertex;
+class AliTracker;
//_____________________________________________________________________________
-class AliITStrackV2 : public AliKalmanTrack {
+class AliITStrackV2 : public AliKalmanTrack {
public:
- AliITStrackV2():AliKalmanTrack(){}
- AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
+ AliITStrackV2();
+ AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
AliITStrackV2(const AliITStrackV2& t);
- Int_t PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3);
- Int_t Propagate(Double_t alpha, Double_t xr, Double_t x0, Double_t rho);
- Int_t PropagateTo(Double_t xr,Double_t x0=21.82,Double_t rho=2.33);
- Int_t Update(const Double_t *m, Double_t chi2, UInt_t i);
- Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
- Int_t Improve(Double_t x0,Double_t yv,Double_t zv);
+ ~AliITStrackV2(){fESDtrack=0;}
+
+ Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
+ Bool_t anglecorr=kFALSE) {
+ return AliExternalTrackParam::CorrectForMeanMaterial(xOverX0,xTimesRho,GetMass(),anglecorr);
+ }
+ Bool_t CorrectForMaterial(Double_t d, Double_t x0=AliITSRecoParam::GetX0Air()) {
+ // deprecated: use CorrectForMeanMaterial instead
+ return AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass());
+ }
+ Bool_t PropagateTo(Double_t xr, Double_t d, Double_t x0=AliITSRecoParam::GetX0Air());
+ Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep, Double_t &xOverX0, Double_t &xTimesRho, Bool_t addTime=kTRUE);
+ Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep=1, Bool_t addTime=kTRUE) {
+ Double_t dummy1,dummy2; return PropagateToTGeo(xToGo,nstep,dummy1,dummy2,addTime);
+ }
+ Double_t GetPredictedChi2(const AliCluster *cluster) const;
+ Bool_t Update(const AliCluster *cl, Double_t chi2, Int_t i);
+
+ Bool_t PropagateToVertex(const AliESDVertex *v,Double_t d=0.,Double_t x0=0.);
+ Bool_t Propagate(Double_t alpha, Double_t xr);
+ Bool_t Propagate(Double_t xr) { return Propagate(GetAlpha(),xr); }
+ Bool_t MeanBudgetToPrimVertex(Double_t xyz[3], Double_t step, Double_t &d) const;
+ Bool_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
+
void SetdEdx(Double_t dedx) {fdEdx=dedx;}
- void CookdEdx(Double_t low=0., Double_t up=1.) {}
+ void SetSampledEdx(Float_t q, Int_t i);
+ Float_t GetSampledEdx(Int_t i) const {return fdEdxSample[i];}
+ void CookdEdx(Double_t low=0., Double_t up=0.51);
void SetDetectorIndex(Int_t i) {SetLabel(i);}
- void ResetCovariance();
- void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
-
- void *operator new(size_t s,void *p) { return p; }
- void *operator new(size_t s) { return ::operator new(s); }
+ void ResetClusters();
+ void UpdateESDtrack(ULong_t flags) const;
+ AliESDtrack *GetESDtrack() const {return fESDtrack;}
+
Int_t GetDetectorIndex() const {return GetLabel();}
- Double_t GetX() const {return fX;}
- Double_t GetAlpha()const {return fAlpha;}
Double_t GetdEdx() const {return fdEdx;}
- Double_t GetY() const {return fP0;}
- Double_t GetZ() const {return fP1;}
- Double_t GetSnp() const {return fP2;}
- Double_t GetTgl() const {return fP3;}
- Double_t Get1Pt() const {return fP4*GetConvConst();}
- Double_t GetD() const;
- Double_t GetSigmaY2() const {return fC00;}
- Double_t GetSigmaZ2() const {return fC11;}
+ Double_t GetPIDsignal() const {return GetdEdx();}
+ using AliExternalTrackParam::GetC;
+ Double_t GetC() const {return AliExternalTrackParam::GetC(GetBz());}
+ Double_t GetD(Double_t x, Double_t y) const {
+ return AliExternalTrackParam::GetD(x,y,GetBz());
+ }
+ void GetDZ(Double_t xv, Double_t yv, Double_t zv, Float_t dz[2]) const {
+ return AliExternalTrackParam::GetDZ(xv,yv,zv,GetBz(),dz);
+ }
+
+ Bool_t GetGlobalXYZat(Double_t xloc,Double_t &x,Double_t &y,Double_t &z) const;
+ Bool_t GetPhiZat(Double_t r,Double_t &phi,Double_t &z) const;
+ Bool_t GetLocalXat(Double_t r,Double_t &xloc) const;
+
Int_t Compare(const TObject *o) const;
- void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
- void GetExternalCovariance(Double_t cov[15]) const ;
Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
- Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
- Double_t GetPredictedChi2(const AliCluster *cluster) const;
- Double_t
- GetPredictedChi2(const AliCluster *cluster, Double_t *m, Double_t x0) const;
- Int_t Invariant() const;
-
-private:
- Double_t fX; // X-coordinate of this track (reference plane)
- Double_t fAlpha; // rotation angle
+ void SetModuleIndex(Int_t ilayer,Int_t idx) {fModule[ilayer]=idx;}
+ Int_t GetModuleIndex(Int_t ilayer) const {return fModule[ilayer];}
+ void SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status=1,Float_t xloc=0,Float_t zloc=0);
+ Bool_t GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,Float_t &xloc,Float_t &zloc) const;
+ Bool_t Invariant() const;
- Double_t fdEdx; // dE/dx
+ void SetExtraCluster(Int_t ilayer, Int_t idx) {fIndex[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
+ Int_t GetExtraCluster(Int_t ilayer) const {return fIndex[AliITSgeomTGeo::kNLayers+ilayer];}
- Double_t fP0; // Y-coordinate of a track
- Double_t fP1; // Z-coordinate of a track
- Double_t fP2; // sine of the track momentum azimuthal angle
- Double_t fP3; // tangent of the track momentum dip angle
- Double_t fP4; // track curvature
+ void SetExtraModule(Int_t ilayer, Int_t idx) {fModule[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
+ Int_t GetExtraModule(Int_t ilayer) const {return fModule[AliITSgeomTGeo::kNLayers+ilayer];}
- Double_t fC00; // covariance
- Double_t fC10, fC11; // matrix
- Double_t fC20, fC21, fC22; // of the
- Double_t fC30, fC31, fC32, fC33; // track
- Double_t fC40, fC41, fC42, fC43, fC44; // parameters
+protected:
+ Double_t fdEdx; // dE/dx
- UInt_t fIndex[kMaxLayer]; // indices of associated clusters
+ static const Int_t fgkWARN; //! used for debugging purposes
+ Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
- ClassDef(AliITStrackV2,1) //ITS reconstructed track
+ Int_t fIndex[2*AliITSgeomTGeo::kNLayers]; // indices of associated clusters
+
+ Int_t fModule[2*AliITSgeomTGeo::kNLayers]; // indices of crossed modules:
+ // see SetModuleIndexInfo()
+ AliESDtrack *fESDtrack; //! pointer to the connected ESD track
+
+private:
+ AliITStrackV2 &operator=(const AliITStrackV2 &tr);
+ ClassDef(AliITStrackV2,7) //ITS reconstructed track
};
-inline
-void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
- //---------------------------------------------------------------------
- // This function return external TPC track representation
- //---------------------------------------------------------------------
- xr=fX;
- x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
+inline void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
+ //----------------------------------------------------------------------
+ // This function stores dEdx sample corrected for the track segment length
+ // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
+ //----------------------------------------------------------------------
+ if (i<0) return;
+ if (i>3) return;
+ Double_t s=GetSnp(), t=GetTgl();
+ q *= TMath::Sqrt((1-s*s)/(1+t*t));
+ fdEdxSample[i]=q;
+ return;
+}
+
+inline void AliITStrackV2::SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status,
+ Float_t xloc,Float_t zloc) {
+ //----------------------------------------------------------------------
+ // This function encodes in the module number also the status of cluster association
+ // "status" can have the following values:
+ // 1 "found" (cluster is associated),
+ // 2 "dead" (module is dead from OCDB),
+ // 3 "skipped" (module or layer forced to be skipped),
+ // 4 "outinz" (track out of z acceptance),
+ // 5 "nocls" (no clusters in the road),
+ // 6 "norefit" (cluster rejected during refit)
+ // 7 "deadzspd" (holes in z in SPD)
+ // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
+ //----------------------------------------------------------------------
+
+ if(idet<0) {
+ idet=0;
+ } else {
+ // same detector numbering as in AliITSCalib classes
+ if(ilayer==1) idet+=AliITSgeomTGeo::GetNLadders(1)*AliITSgeomTGeo::GetNDetectors(1);
+ if(ilayer==3) idet+=AliITSgeomTGeo::GetNLadders(3)*AliITSgeomTGeo::GetNDetectors(3);
+ if(ilayer==5) idet+=AliITSgeomTGeo::GetNLadders(5)*AliITSgeomTGeo::GetNDetectors(5);
+ }
+
+ Int_t xInt = Int_t(xloc*10.);
+ Int_t zInt = Int_t(zloc*10.);
+
+ if(TMath::Abs(xloc*10.-(Float_t)xInt)>0.5){
+ if(zloc>0) {
+ xInt++;
+ }
+ else {
+ xInt--;
+ }
+ }
+ if(TMath::Abs(zloc*10.-(Float_t)zInt)>0.5){
+ if(zloc>0) {
+ zInt++;
+ }
+ else {
+ zInt--;
+ }
+ }
+ Int_t signs=0;
+ if(xInt>=0 && zInt>=0) signs=10000;
+ if(xInt>=0 && zInt<0) signs=20000;
+ if(xInt<0 && zInt>=0) signs=30000;
+ if(xInt<0 && zInt<0) signs=40000;
+
+ Int_t modindex = signs;
+
+ modindex += TMath::Abs(zInt);
+ modindex += TMath::Abs(xInt)*100;
+
+ modindex += status*100000;
+
+ modindex += idet*1000000;
+
+ SetModuleIndex(ilayer,modindex);
+ return;
}
+inline Bool_t AliITStrackV2::GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,
+ Float_t &xloc,Float_t &zloc) const {
+ //----------------------------------------------------------------------
+ // This function encodes in the module number also the status of cluster association
+ // "status" can have the following values:
+ // 1 "found" (cluster is associated),
+ // 2 "dead" (module is dead from OCDB),
+ // 3 "skipped" (module or layer forced to be skipped),
+ // 4 "outinz" (track out of z acceptance),
+ // 5 "nocls" (no clusters in the road),
+ // 6 "norefit" (cluster rejected during refit),
+ // 7 "deadzspd" (holes in z in SPD)
+ // Also given are the coordinates of the crossing point of track and module
+ // (in the local module ref. system)
+ // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
+ //----------------------------------------------------------------------
+
+
+ if(fModule[ilayer]==-1) {
+ AliError("fModule was not set !");
+ idet = -1;
+ status=0;
+ xloc=-99.; zloc=-99.;
+ return kFALSE;
+ }
+
+ Int_t module = fModule[ilayer];
+
+ idet = Int_t(module/1000000);
+
+ module -= idet*1000000;
+
+ status = Int_t(module/100000);
+
+ module -= status*100000;
+
+ Int_t signs = Int_t(module/10000);
+
+ module-=signs*10000;
+
+ Int_t xInt = Int_t(module/100);
+ module -= xInt*100;
+
+ Int_t zInt = module;
+
+ if(signs==1) { xInt*=1; zInt*=1; }
+ if(signs==2) { xInt*=1; zInt*=-1; }
+ if(signs==3) { xInt*=-1; zInt*=1; }
+ if(signs==4) { xInt*=-1; zInt*=-1; }
+
+ xloc = 0.1*(Float_t)xInt;
+ zloc = 0.1*(Float_t)zInt;
+
+ if(status==4) idet = -1;
+
+ return kTRUE;
+}
+
+
#endif
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