X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TPC%2FAliTPCtrack.cxx;h=a3238802548f3e5271ab71749510de54b17dee5a;hb=ccb771e140afcc86606864d3a38facaa7cea4032;hp=dc292ebb96cbffba656648e0228be9a6ebad0aee;hpb=9c9d24878414db1f6729c0cd67a98d61a65bc92d;p=u%2Fmrichter%2FAliRoot.git diff --git a/TPC/AliTPCtrack.cxx b/TPC/AliTPCtrack.cxx index dc292ebb96c..a3238802548 100644 --- a/TPC/AliTPCtrack.cxx +++ b/TPC/AliTPCtrack.cxx @@ -13,40 +13,7 @@ * provided "as is" without express or implied warranty. * **************************************************************************/ -/* -$Log$ -Revision 1.19 2003/03/03 16:56:53 hristov -Corrections to obey coding conventions - -Revision 1.18 2003/02/19 08:57:04 hristov -Control^M removed - -Revision 1.17 2003/02/19 08:49:46 hristov -Track time measurement (S.Radomski) - -Revision 1.16 2003/02/06 11:11:36 kowal2 -Added a few get methods by Jiri Chudoba - -Revision 1.15 2002/11/25 09:33:30 hristov -Tracking of secondaries (M.Ivanov) - -Revision 1.14 2002/10/23 13:45:00 hristov -Fatal if no magnetic field set for the reconstruction (Y.Belikov) - -Revision 1.13 2002/10/23 07:17:34 alibrary -Introducing Riostream.h - -Revision 1.12 2002/10/14 14:57:43 hristov -Merging the VirtualMC branch to the main development branch (HEAD) - -Revision 1.9.6.1 2002/10/11 08:34:48 hristov -Updating VirtualMC to v3-09-02 - -Revision 1.11 2002/07/19 07:34:42 kowal2 -Logs added - -*/ - +/* $Id$ */ //----------------------------------------------------------------- // Implementation of the TPC track class @@ -58,141 +25,196 @@ Logs added #include "AliTPCtrack.h" #include "AliCluster.h" -#include "AliBarrelTrack.h" +#include "AliTracker.h" +#include "AliESDtrack.h" ClassImp(AliTPCtrack) //_________________________________________________________________________ -AliTPCtrack::AliTPCtrack(): 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() { - fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0; - fAlpha = fdEdx = 0.0; - fNWrong = fNRotation = fNumber = 0; // [SR, 01.04.2003] + //------------------------------------------------- + // default constructor + //------------------------------------------------- + for (Int_t i=0; i=TMath::Pi()) fAlpha -= 2*TMath::Pi(); - fdEdx=0.; - - fP0=xx[0]; fP1=xx[1]; fP2=xx[2]; fP3=xx[3]; fP4=xx[4]; + 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 mostProbablePt=AliExternalTrackParam::GetMostProbablePt(); + Double_t p0=TMath::Sign(1/mostProbablePt,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); - 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. //----------------------------------------------------------------- - SetChi2(0.); - SetNumberOfClusters(0); - - 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]; - + SetNumberOfClusters(t.GetTPCclusters(fIndex)); + SetLabel(t.GetLabel()); + SetMass(t.GetMass()); + 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; iSetLabel(GetLabel()); - track->SetX(fX, fAlpha); - track->SetNClusters(GetNumberOfClusters(), GetChi2()); - track->SetTime(fIntegratedTime, fIntegratedLength); - - track->SetMass(fMass); - track->SetdEdX(fdEdx); +AliTPCtrack& AliTPCtrack::operator=(const AliTPCtrack& o){ + if(this!=&o){ + AliKalmanTrack::operator=(o); + fdEdx = o.fdEdx; + for(Int_t i = 0;iSetNWrongClusters(fNWrong); - track->SetNRotate(fNRotation); +} - GetExternalParameters(xr, vec); - track->SetStateVector(vec); - - GetExternalCovariance(cov); - track->SetCovarianceMatrix(cov); -} //_____________________________________________________________________________ Int_t AliTPCtrack::Compare(const TObject *o) const { //----------------------------------------------------------------- // This function compares tracks according to the their curvature //----------------------------------------------------------------- AliTPCtrack *t=(AliTPCtrack*)o; - //Double_t co=TMath::Abs(t->Get1Pt()); - //Double_t c =TMath::Abs(Get1Pt()); + //Double_t co=t->OneOverPt(); + //Double_t c = OneOverPt(); Double_t co=t->GetSigmaY2()*t->GetSigmaZ2(); Double_t c =GetSigmaY2()*GetSigmaZ2(); if (c>co) return 1; @@ -200,306 +222,179 @@ Int_t AliTPCtrack::Compare(const TObject *o) const { return 0; } -//_____________________________________________________________________________ -void AliTPCtrack::GetExternalCovariance(Double_t cc[15]) const { - //------------------------------------------------------------------------- - // This function returns an external representation of the covriance matrix. - // (See comments in AliTPCtrack.h about external track representation) - //------------------------------------------------------------------------- - Double_t a=GetConvConst(); - - Double_t c22=fX*fX*fC44-2*fX*fC42+fC22; - Double_t c32=fX*fC43-fC32; - Double_t c20=fX*fC40-fC20, c21=fX*fC41-fC21, c42=fX*fC44-fC42; - - cc[0 ]=fC00; - cc[1 ]=fC10; cc[2 ]=fC11; - cc[3 ]=c20; cc[4 ]=c21; cc[5 ]=c22; - cc[6 ]=fC30; cc[7 ]=fC31; cc[8 ]=c32; cc[9 ]=fC33; - cc[10]=fC40*a; cc[11]=fC41*a; cc[12]=c42*a; cc[13]=fC43*a; cc[14]=fC44*a*a; - -} - -//_____________________________________________________________________________ -Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const -{ +Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const { //----------------------------------------------------------------- // This function calculates a predicted chi2 increment. //----------------------------------------------------------------- - Double_t r00=c->GetSigmaY2(), 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) >= 0.9) { - // 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 1; + 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 p[2]={c->GetY(), c->GetZ()}; + Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()}; - // update the number of wrong SR[20.03.2003] - Int_t absLabel = TMath::Abs(GetLabel()); - if ( (c->GetLabel(0) != absLabel) && - (c->GetLabel(0) != absLabel) && - (c->GetLabel(0) != absLabel)) fNWrong++; - // - - 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) >= 0.9) { - // Int_t n=GetNumberOfClusters(); - //if (n>4) cerr<GetVolumeId()); Int_t n=GetNumberOfClusters(); fIndex[n]=index; SetNumberOfClusters(n+1); SetChi2(GetChi2()+chisq); - return 1; + return kTRUE; } -//_____________________________________________________________________________ -Int_t AliTPCtrack::Rotate(Double_t alpha) -{ - //----------------------------------------------------------------- - // This function rotates this track. - //----------------------------------------------------------------- +//////////////////////////////////////////////////////////////////////// +// MI ADDITION - if (alpha != 0) fNRotation++; // [SR, 01.04.2003] +Float_t AliTPCtrack::Density(Int_t row0, Int_t row1) +{ + // + // calculate cluster density + Int_t good = 0; + Int_t found = 0; + //if (row0fLastPoint) row1 = fLastPoint; - 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<0) found++; } - - Double_t y0=fP0 + sqrt(1.- r2*r2)/fP4; - if ((fP0-y0)*fP4 >= 0.) { - Int_t n=GetNumberOfClusters(); - if (n>4) cerr<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]=2*TMath::Pi()) phi-=2*TMath::Pi(); - return phi; +Double_t AliTPCtrack::GetBz() const { + // + // returns Bz component of the magnetic field (kG) + // + if (AliTracker::UniformField()) return AliTracker::GetBz(); + Double_t r[3]; GetXYZ(r); + return AliTracker::GetBz(r); } -////////////////////////////////////////////////////////////////////////