X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TPC%2FAliTPCtrack.cxx;h=de4d841160dd02361a569ff169f2ec80e24c7a95;hb=72600597e34e128f6b1e58cc3ebd220aeec02a5b;hp=cef7ab52373e555174433d0b99069b066e391301;hpb=024a7fe95dfb0f18bd4b1747687ebdb86d0d239f;p=u%2Fmrichter%2FAliRoot.git diff --git a/TPC/AliTPCtrack.cxx b/TPC/AliTPCtrack.cxx index cef7ab52373..de4d841160d 100644 --- a/TPC/AliTPCtrack.cxx +++ b/TPC/AliTPCtrack.cxx @@ -13,106 +13,170 @@ * provided "as is" without express or implied warranty. * **************************************************************************/ +/* $Id$ */ + //----------------------------------------------------------------- // Implementation of the TPC track class -// -// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch +// This class is used by the AliTPCtracker class +// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //----------------------------------------------------------------- -#include +#include #include "AliTPCtrack.h" -#include "AliTPCcluster.h" -#include "AliTPCClustersRow.h" -#include "AliTPCClustersArray.h" +#include "AliCluster.h" +#include "AliTracker.h" +#include "AliESDtrack.h" ClassImp(AliTPCtrack) //_________________________________________________________________________ -AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5], -const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() { +AliTPCtrack::AliTPCtrack(): + AliKalmanTrack(), + fdEdx(0), + fSdEdx(1e10), + fNFoundable(0), + fBConstrain(kFALSE), + fLastPoint(-1), + fFirstPoint(-1), + fRemoval(0), + fTrackType(0), + fLab2(-1), + fNShared(0), + fReference() +{ + //------------------------------------------------- + // default constructor + //------------------------------------------------- + for (Int_t i=0; i=TMath::Pi()) fAlpha -= 2*TMath::Pi(); - fdEdx=0.; + Double_t cnv=1./(AliTracker::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 + }; + + Double_t p0=TMath::Sign(1/kMostProbablePt,pp[4]); + Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0); + pp[4] = w0*p0 + w1*pp[4]; + cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1; + + Set(x,alpha,pp,cc); - fP0=xx[0]; fP1=xx[1]; fP2=xx[2]; fP3=xx[3]; fP4=xx[4]; - - fC00=cc[0]; - fC10=cc[1]; fC11=cc[2]; - fC20=cc[3]; fC21=cc[4]; fC22=cc[5]; - fC30=cc[6]; fC31=cc[7]; fC32=cc[8]; fC33=cc[9]; - fC40=cc[10]; fC41=cc[11]; fC42=cc[12]; fC43=cc[13]; fC44=cc[14]; - - fIndex[0]=index; SetNumberOfClusters(1); - + + fIndex[0]=index; + for (Int_t i=1; i AliTPCtrack. + // Conversion AliESDtrack -> AliTPCtrack. //----------------------------------------------------------------- + SetNumberOfClusters(t.GetTPCclusters(fIndex)); SetLabel(t.GetLabel()); - SetChi2(0.); SetMass(t.GetMass()); - SetNumberOfClusters(0); - //SetConvConst(t.GetConvConst()); - - fdEdx = 0.; - fAlpha = alpha; - if (fAlpha < -TMath::Pi()) fAlpha += 2*TMath::Pi(); - else if (fAlpha >= TMath::Pi()) fAlpha -= 2*TMath::Pi(); - - //Conversion of the track parameters - Double_t x,p[5]; t.GetExternalParameters(x,p); - fX=x; x=GetConvConst(); - fP0=p[0]; - fP1=p[1]; - fP3=p[3]; - fP4=p[4]/x; - fP2=fP4*fX - p[2]; - - //Conversion of the covariance matrix - Double_t c[15]; t.GetExternalCovariance(c); - c[10]/=x; c[11]/=x; c[12]/=x; c[13]/=x; c[14]/=x*x; - - Double_t c22=fX*fX*c[14] - 2*fX*c[12] + c[5]; - Double_t c32=fX*c[13] - c[8]; - Double_t c20=fX*c[10] - c[3], c21=fX*c[11] - c[4], c42=fX*c[14] - c[12]; - - fC00=c[0 ]; - fC10=c[1 ]; fC11=c[2 ]; - fC20=c20; fC21=c21; fC22=c22; - fC30=c[6 ]; fC31=c[7 ]; fC32=c32; fC33=c[9 ]; - fC40=c[10]; fC41=c[11]; fC42=c42; fC43=c[13]; fC44=c[14]; + for (Int_t i=0; i<4;i++) fPoints[i]=0.; + for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.; + for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0; + for (Int_t i=0; i<3;i++) fV0Indexes[i]=0; + Set(t.GetX(),t.GetAlpha(),t.GetParameter(),t.GetCovariance()); + + if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return; + StartTimeIntegral(); + Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times); + SetIntegratedLength(t.GetIntegratedLength()); } //_____________________________________________________________________________ -AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) { +AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : + AliKalmanTrack(t), + fdEdx(t.fdEdx), + fSdEdx(t.fSdEdx), + fNFoundable(t.fNFoundable), + fBConstrain(t.fBConstrain), + fLastPoint(t.fLastPoint), + fFirstPoint(t.fFirstPoint), + fRemoval(t.fRemoval), + fTrackType(t.fTrackType), + fLab2(t.fLab2), + fNShared(t.fNShared), + fReference(t.fReference) + +{ //----------------------------------------------------------------- // This is a track copy constructor. //----------------------------------------------------------------- - fX=t.fX; - fAlpha=t.fAlpha; - fdEdx=t.fdEdx; - - fP0=t.fP0; fP1=t.fP1; fP2=t.fP2; fP3=t.fP3; fP4=t.fP4; - - fC00=t.fC00; - fC10=t.fC10; fC11=t.fC11; - fC20=t.fC20; fC21=t.fC21; fC22=t.fC22; - fC30=t.fC30; fC31=t.fC31; fC32=t.fC32; fC33=t.fC33; - fC40=t.fC40; fC41=t.fC41; fC42=t.fC42; fC43=t.fC43; fC44=t.fC44; + Set(t.GetX(),t.GetAlpha(),t.GetParameter(),t.GetCovariance()); - Int_t n=GetNumberOfClusters(); - for (Int_t i=0; iGetSigmaY2(), r01=0., r11=c->GetSigmaZ2(); - r00+=fC00; r01+=fC10; r11+=fC11; - - Double_t det=r00*r11 - r01*r01; - if (TMath::Abs(det) < 1.e-10) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<GetY() - fP0, dz=c->GetZ() - fP1; - - return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det; + Double_t p[2]={c->GetY(), c->GetZ()}; + Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()}; + return AliExternalTrackParam::GetPredictedChi2(p,cov); } //_____________________________________________________________________________ -Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho) { +Bool_t AliTPCtrack::PropagateTo(Double_t xk,Double_t rho,Double_t x0) { //----------------------------------------------------------------- - // This function propagates a track to a reference plane x=xk. + // This function propagates a track to a reference plane x=xk. + // rho - density of the crossed matrial (g/cm^3) + // x0 - radiation length of the crossed material (g/cm^2) //----------------------------------------------------------------- - if (TMath::Abs(fP4*xk - fP2) >= 0.99999) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<oldX) AddTimeStep(d); + + if (oldX < xk) d = -d; + if (!AliExternalTrackParam::CorrectForMaterial(d*rho/x0,x0,GetMass())) + return kFALSE; + + return kTRUE; } //_____________________________________________________________________________ -Int_t AliTPCtrack::PropagateToVertex(Double_t x0,Double_t rho) +Bool_t +AliTPCtrack::PropagateToVertex(const AliESDVertex *v,Double_t d,Double_t x0) { //----------------------------------------------------------------- - // This function propagates tracks to the "vertex". + // This function propagates tracks to the vertex. //----------------------------------------------------------------- - Double_t c=fP4*fX - fP2; - Double_t tgf=-fP2/(fP4*fP0 + sqrt(1-c*c)); - Double_t snf=tgf/sqrt(1.+ tgf*tgf); - Double_t xv=(fP2+snf)/fP4; - return PropagateTo(xv,x0,rho); + Double_t bz=GetBz(); + if (PropagateToDCA(v,bz,kVeryBig)) + if (AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass())) return kTRUE; + return kFALSE; } //_____________________________________________________________________________ -Int_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, UInt_t index) { +Bool_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, Int_t index) { //----------------------------------------------------------------- // This function associates a cluster with this track. //----------------------------------------------------------------- - Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2(); - r00+=fC00; r01+=fC10; r11+=fC11; - Double_t det=r00*r11 - r01*r01; - Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det; - - Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11; - Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11; - Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11; - Double_t k30=fC30*r00+fC31*r01, k31=fC30*r01+fC31*r11; - Double_t k40=fC40*r00+fC41*r01, k41=fC40*r01+fC41*r11; - - Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1; - Double_t cur=fP4 + k40*dy + k41*dz, eta=fP2 + k20*dy + k21*dz; - if (TMath::Abs(cur*fX-eta) >= 0.99999) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<GetY(), c->GetZ()}; + Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()}; - fC11-=k10*c01+k11*fC11; - fC21-=k10*c02+k11*c12; fC31-=k10*c03+k11*c13; - fC41-=k10*c04+k11*c14; - - fC22-=k20*c02+k21*c12; fC32-=k20*c03+k21*c13; - fC42-=k20*c04+k21*c14; - - fC33-=k30*c03+k31*c13; - fC43-=k40*c03+k41*c13; - - fC44-=k40*c04+k41*c14; + if (!AliExternalTrackParam::Update(p,cov)) return kFALSE; Int_t n=GetNumberOfClusters(); fIndex[n]=index; SetNumberOfClusters(n+1); SetChi2(GetChi2()+chisq); - return 1; + return kTRUE; } -//_____________________________________________________________________________ -Int_t AliTPCtrack::Rotate(Double_t alpha) +//////////////////////////////////////////////////////////////////////// +// MI ADDITION + +Float_t AliTPCtrack::Density(Int_t row0, Int_t row1) { - //----------------------------------------------------------------- - // This function rotates this track. - //----------------------------------------------------------------- - fAlpha += alpha; - if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi(); - if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi(); - - Double_t x1=fX, y1=fP0; - Double_t ca=cos(alpha), sa=sin(alpha); - Double_t r1=fP4*fX - fP2; - - fX = x1*ca + y1*sa; - fP0=-x1*sa + y1*ca; - fP2=fP2*ca + (fP4*y1 + sqrt(1.- r1*r1))*sa; - - Double_t r2=fP4*fX - fP2; - if (TMath::Abs(r2) >= 0.99999) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<fLastPoint) row1 = fLastPoint; + - Double_t y0=fP0 + sqrt(1.- r2*r2)/fP4; - if ((fP0-y0)*fP4 >= 0.) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<0) found++; } - - //f = F - 1 - Double_t f00=ca-1, f24=(y1 - r1*x1/sqrt(1.- r1*r1))*sa, - f20=fP4*sa, f22=(ca + sa*r1/sqrt(1.- r1*r1))-1; - - //b = C*ft - Double_t b00=fC00*f00, b02=fC00*f20+fC40*f24+fC20*f22; - Double_t b10=fC10*f00, b12=fC10*f20+fC41*f24+fC21*f22; - Double_t b20=fC20*f00, b22=fC20*f20+fC42*f24+fC22*f22; - Double_t b30=fC30*f00, b32=fC30*f20+fC43*f24+fC32*f22; - Double_t b40=fC40*f00, b42=fC40*f20+fC44*f24+fC42*f22; - - //a = f*b = f*C*ft - Double_t a00=f00*b00, a02=f00*b02, a22=f20*b02+f24*b42+f22*b22; - - // *** Double_t dy2=fCyy; - - //F*C*Ft = C + (a + b + bt) - fC00 += a00 + 2*b00; - fC10 += b10; - fC20 += a02+b20+b02; - fC30 += b30; - fC40 += b40; - fC21 += b12; - fC32 += b32; - fC22 += a22 + 2*b22; - fC42 += b42; - - // *** fCyy+=dy2*sa*sa*r1*r1/(1.- r1*r1); - // *** fCzz+=d2y*sa*sa*fT*fT/(1.- r1*r1); - - return 1; + Float_t density=0; + if (good>0) density = Float_t(found)/Float_t(good); + return density; } -void AliTPCtrack::ResetCovariance() { - //------------------------------------------------------------------ - //This function makes a track forget its history :) - //------------------------------------------------------------------ - fC00*=10.; - fC10=0.; fC11*=10.; - fC20=0.; fC21=0.; fC22*=10.; - fC30=0.; fC31=0.; fC32=0.; fC33*=10.; - fC40=0.; fC41=0.; fC42=0.; fC43=0.; fC44*=10.; +Float_t AliTPCtrack::Density2(Int_t row0, Int_t row1) +{ + // + // calculate cluster density + Int_t good = 0; + Int_t found = 0; + // + for (Int_t i=row0;i<=row1;i++){ + Int_t index = fIndex[i]; + if (index!=-1) good++; + if (index>0) found++; + } + Float_t density=0; + if (good>0) density = Float_t(found)/Float_t(good); + return density; +} + +void AliTPCtrack::UpdatePoints() +{ + //-------------------------------------------------- + //calculates first ,amx dens and last points + //-------------------------------------------------- + Float_t density[160]; + for (Int_t i=0;i<160;i++) density[i]=-1.; + fPoints[0]= 160; + fPoints[1] = -1; + // + Int_t ngood=0; + Int_t undeff=0; + Int_t nall =0; + Int_t range=20; + for (Int_t i=0;i<160;i++){ + Int_t last = i-range; + if (nall=0){ + if (fIndex[last]>0&& (fIndex[last]&0x8000)==0) ngood--; + if (fIndex[last]==-1) undeff--; + } + if (fIndex[i]>0&& (fIndex[i]&0x8000)==0) ngood++; + if (fIndex[i]==-1) undeff++; + if (nall==range &&undeffmaxdens){ + maxdens=density[i]; + indexmax=i; + } + } + // + //max dens point + fPoints[3] = maxdens; + fPoints[1] = indexmax; + // + // last point + for (Int_t i=indexmax;i<160;i++){ + if (density[i]<0) continue; + if (density[i]0;i--){ + if (density[i]<0) continue; + if (density[i]