* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.2 2000/06/30 12:07:50 kowal2
-Updated from the TPC-PreRelease branch
-
-Revision 1.1.2.1 2000/06/25 08:53:55 kowal2
-Splitted from AliTPCtracking
-
-*/
+/* $Id$ */
//-------------------------------------------------------
// Implementation of the TPC tracker
//
// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-------------------------------------------------------
-
#include <TObjArray.h>
+#include <TError.h>
#include <TFile.h>
#include <TTree.h>
-#include <iostream.h>
+
+#include "AliESDEvent.h"
#include "AliTPCtracker.h"
#include "AliTPCcluster.h"
-#include "AliTPCClustersArray.h"
-#include "AliTPCClustersRow.h"
+#include "AliTPCParam.h"
+#include "AliClusters.h"
-const AliTPCParam *AliTPCtracker::AliTPCSector::fgParam;
+ClassImp(AliTPCtracker)
//_____________________________________________________________________________
-Double_t SigmaY2(Double_t r, Double_t tgl, Double_t pt)
+AliTPCtracker::AliTPCtracker():
+ AliTracker(),
+ fkNIS(0),
+ fInnerSec(0),
+ fkNOS(0),
+ fOuterSec(0),
+ fN(0),
+ fSectors(0),
+ fParam(0),
+ fSeeds(0)
{
//
- // Parametrised error of the cluster reconstruction (pad direction)
+ // The default TPC tracker constructor
//
- // Sigma rphi
- const Float_t kArphi=0.41818e-2;
- const Float_t kBrphi=0.17460e-4;
- const Float_t kCrphi=0.30993e-2;
- const Float_t kDrphi=0.41061e-3;
-
- pt=TMath::Abs(pt)*1000.;
- Double_t x=r/pt;
- tgl=TMath::Abs(tgl);
- Double_t s=kArphi - kBrphi*r*tgl + kCrphi*x*x + kDrphi*x;
- if (s<0.4e-3) s=0.4e-3;
- s*=1.3; //Iouri Belikov
-
- return s;
}
//_____________________________________________________________________________
-Double_t SigmaZ2(Double_t r, Double_t tgl)
+AliTPCtracker::AliTPCtracker(const AliTPCParam *par):
+ AliTracker(),
+ fkNIS(par->GetNInnerSector()/2),
+ fInnerSec(new AliTPCSector[fkNIS]),
+ fkNOS(par->GetNOuterSector()/2),
+ fOuterSec(new AliTPCSector[fkNOS]),
+ fN(0),
+ fSectors(0),
+ fParam((AliTPCParam*) par),
+ fSeeds(0)
{
- //
- // Parametrised error of the cluster reconstruction (drift direction)
- //
- // Sigma z
- const Float_t kAz=0.39614e-2;
- const Float_t kBz=0.22443e-4;
- const Float_t kCz=0.51504e-1;
-
+ //---------------------------------------------------------------------
+ // The main TPC tracker constructor
+ //---------------------------------------------------------------------
+
+ Int_t i;
+ for (i=0; i<fkNIS; i++) fInnerSec[i].Setup(par,0);
+ for (i=0; i<fkNOS; i++) fOuterSec[i].Setup(par,1);
- tgl=TMath::Abs(tgl);
- Double_t s=kAz - kBz*r*tgl + kCz*tgl*tgl;
- if (s<0.4e-3) s=0.4e-3;
- s*=1.3; //Iouri Belikov
+}
- return s;
+//_____________________________________________________________________________
+AliTPCtracker::~AliTPCtracker() {
+ //------------------------------------------------------------------
+ // TPC tracker destructor
+ //------------------------------------------------------------------
+ delete[] fInnerSec;
+ delete[] fOuterSec;
+ if (fSeeds) {
+ fSeeds->Delete();
+ delete fSeeds;
+ }
}
//_____________________________________________________________________________
-inline Double_t f1(Double_t x1,Double_t y1,
+Double_t f1(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
//_____________________________________________________________________________
-inline Double_t f2(Double_t x1,Double_t y1,
+Double_t f2(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
}
//_____________________________________________________________________________
-inline Double_t f3(Double_t x1,Double_t y1,
+Double_t f3(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t z1,Double_t z2)
{
}
//_____________________________________________________________________________
-Int_t AliTPCtracker::FindProlongation(AliTPCseed& t, const AliTPCSector *sec,
-Int_t s, Int_t rf)
-{
+Int_t AliTPCtracker::LoadClusters(TTree *cTree) {
+ //-----------------------------------------------------------------
+ // This function loads TPC clusters.
+ //-----------------------------------------------------------------
+ TBranch *branch=cTree->GetBranch("Segment");
+ if (!branch) {
+ Error("LoadClusters","Can't get the branch !");
+ return 1;
+ }
+
+ AliClusters carray, *addr=&carray;
+ carray.SetClass("AliTPCcluster");
+ carray.SetArray(0);
+ branch->SetAddress(&addr);
+
+ Int_t nentr=(Int_t)cTree->GetEntries();
+
+ for (Int_t i=0; i<nentr; i++) {
+ cTree->GetEvent(i);
+
+ Int_t ncl=carray.GetArray()->GetEntriesFast();
+
+ Int_t nir=fInnerSec->GetNRows(), nor=fOuterSec->GetNRows();
+ Int_t id=carray.GetID();
+ if ((id<0) || (id>2*(fkNIS*nir + fkNOS*nor))) {
+ Fatal("LoadClusters","Wrong index !");
+ }
+ Int_t outindex = 2*fkNIS*nir;
+ if (id<outindex) {
+ Int_t sec = id/nir;
+ Int_t row = id - sec*nir;
+ sec %= fkNIS;
+ AliTPCRow &padrow=fInnerSec[sec][row];
+ while (ncl--) {
+ AliTPCcluster *c=(AliTPCcluster*)carray[ncl];
+ padrow.InsertCluster(c,sec,row);
+ }
+ } else {
+ id -= outindex;
+ Int_t sec = id/nor;
+ Int_t row = id - sec*nor;
+ sec %= fkNOS;
+ AliTPCRow &padrow=fOuterSec[sec][row];
+ while (ncl--) {
+ AliTPCcluster *c=(AliTPCcluster*)carray[ncl];
+ padrow.InsertCluster(c,sec+fkNIS,row);
+ }
+ }
+ carray.GetArray()->Clear();
+ }
+
+ return 0;
+}
+
+//_____________________________________________________________________________
+void AliTPCtracker::UnloadClusters() {
+ //-----------------------------------------------------------------
+ // This function unloads TPC clusters.
+ //-----------------------------------------------------------------
+ Int_t i;
+ for (i=0; i<fkNIS; i++) {
+ Int_t nr=fInnerSec->GetNRows();
+ for (Int_t n=0; n<nr; n++) fInnerSec[i][n].ResetClusters();
+ }
+ for (i=0; i<fkNOS; i++) {
+ Int_t nr=fOuterSec->GetNRows();
+ for (Int_t n=0; n<nr; n++) fOuterSec[i][n].ResetClusters();
+ }
+}
+
+//_____________________________________________________________________________
+Int_t AliTPCtracker::FollowProlongation(AliTPCseed& t, Int_t rf) {
//-----------------------------------------------------------------
// This function tries to find a track prolongation.
//-----------------------------------------------------------------
- const Int_t kSKIP=(t.GetNumberOfClusters()<10) ?
- 10 : Int_t(0.5*sec->GetNRows());
+ Double_t xt=t.GetX();
+ const Int_t kSKIP=(t.GetNumberOfClusters()<10) ? kRowsToSkip :
+ Int_t(0.5*fSectors->GetNRows());
Int_t tryAgain=kSKIP;
- Double_t alpha=sec->GetAlpha();
- Int_t ns=Int_t(2*TMath::Pi()/alpha+0.5);
- for (Int_t nr=sec->GetRowNumber(t.GetX())-1; nr>=rf; nr--) {
- Double_t x=sec->GetX(nr), ymax=sec->GetMaxY(nr);
+ Double_t alpha=t.GetAlpha() - fSectors->GetAlphaShift();
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+ Int_t s=Int_t(alpha/fSectors->GetAlpha())%fN;
+
+ Int_t nrows=fSectors->GetRowNumber(xt)-1;
+ for (Int_t nr=nrows; nr>=rf; nr--) {
+ Double_t x=fSectors->GetX(nr), ymax=fSectors->GetMaxY(nr);
if (!t.PropagateTo(x)) return 0;
AliTPCcluster *cl=0;
UInt_t index=0;
- Double_t maxchi2=12.;
- const AliTPCRow &krow=sec[s][nr];
- Double_t sy2=SigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
- Double_t sz2=SigmaZ2(t.GetX(),t.GetTgl());
+ Double_t maxchi2=kMaxCHI2;
+ const AliTPCRow &krow=fSectors[s][nr];
+ Double_t pt=1./t.Get1Pt();
+ Double_t sy2=AliTPCcluster::SigmaY2(t.GetX(),t.GetTgl(),pt);
+ Double_t sz2=AliTPCcluster::SigmaZ2(t.GetX(),t.GetTgl());
Double_t road=4.*sqrt(t.GetSigmaY2() + sy2), y=t.GetY(), z=t.GetZ();
- if (road>30) {
+ if (road>kMaxROAD) {
if (t.GetNumberOfClusters()>4)
- cerr<<t.GetNumberOfClusters()
- <<"FindProlongation warning: Too broad road !\n";
+ Warning("FindProlongation","Too broad road !");
return 0;
}
}
}
if (cl) {
- Float_t l=sec->GetPadPitchWidth();
- t.SetSampledEdx(cl->GetQ()/l,t.GetNumberOfClusters());
- t.Update(cl,maxchi2,index);
- tryAgain=kSKIP;
+ Float_t l=fSectors->GetPadPitchWidth();
+ Float_t corr=1.; if (nr>63) corr=0.67; // new (third) pad response !
+ t.SetSampledEdx(cl->GetQ()/l*corr,t.GetNumberOfClusters());
+ if (!t.Update(cl,maxchi2,index)) {
+ if (!tryAgain--) return 0;
+ } else tryAgain=kSKIP;
} else {
if (tryAgain==0) break;
if (y > ymax) {
- s = (s+1) % ns;
- if (!t.Rotate(alpha)) return 0;
+ s = (s+1) % fN;
+ if (!t.Rotate(fSectors->GetAlpha())) return 0;
} else if (y <-ymax) {
- s = (s-1+ns) % ns;
- if (!t.Rotate(-alpha)) return 0;
+ s = (s-1+fN) % fN;
+ if (!t.Rotate(-fSectors->GetAlpha())) return 0;
}
tryAgain--;
}
}
return 1;
+}
+//_____________________________________________________________________________
+
+Int_t AliTPCtracker::FollowRefitInward(AliTPCseed *seed, AliTPCtrack *track) {
+ //
+ // This function propagates seed inward TPC using old clusters
+ // from the track.
+ //
+ // Sylwester Radomski, GSI
+ // 26.02.2003
+ //
+
+ // loop over rows
+
+ Int_t nRows = fSectors->GetNRows();
+ for (Int_t iRow = nRows-1; iRow >= 0; iRow--) {
+
+ Double_t x = fSectors->GetX(iRow);
+ if (!seed->PropagateTo(x)) return 0;
+
+ // try to find an assigned cluster in this row
+
+ AliTPCcluster* cluster = NULL;
+ Int_t idx = -1;
+ Int_t sec = -1;
+ for (Int_t iCluster = 0; iCluster < track->GetNumberOfClusters(); iCluster++) {
+ idx = track->GetClusterIndex(iCluster);
+ sec = (idx&0xff000000)>>24;
+ Int_t row = (idx&0x00ff0000)>>16;
+ if (((fSectors == fInnerSec) && (sec >= fkNIS)) ||
+ ((fSectors == fOuterSec) && (sec < fkNIS))) continue;
+ if (row == iRow) {
+ cluster = (AliTPCcluster*) GetCluster(idx);
+ break;
+ }
+ }
+
+ // update the track seed with the found cluster
+
+ if (cluster) {
+ Double_t dAlpha = fParam->GetAngle(sec) - seed->GetAlpha();
+ if (TMath::Abs(dAlpha) > 0.0001) {
+ if (!seed->Rotate(dAlpha)) return 0;
+ if (!seed->PropagateTo(x)) return 0;
+ }
+
+ seed->Update(cluster, seed->GetPredictedChi2(cluster), idx);
+ }
+ }
+
+ return 1;
+}
+
+//_____________________________________________________________________________
+Int_t AliTPCtracker::FollowBackProlongation
+(AliTPCseed& seed, const AliTPCtrack &track) {
+ //-----------------------------------------------------------------
+ // This function propagates tracks back through the TPC
+ //-----------------------------------------------------------------
+ Double_t alpha=seed.GetAlpha() - fSectors->GetAlphaShift();
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+ Int_t s=Int_t(alpha/fSectors->GetAlpha())%fN;
+
+ Int_t idx=-1, sec=-1, row=-1;
+ Int_t nc=track.GetNumberOfClusters();
+
+ if (nc--) {
+ idx=track.GetClusterIndex(nc);
+ sec=(idx&0xff000000)>>24; row=(idx&0x00ff0000)>>16;
+ }
+ if (fSectors==fInnerSec) { if (sec >= fkNIS) row=-1; }
+ else { if (sec < fkNIS) row=-1; }
+
+ Int_t nr=fSectors->GetNRows();
+ for (Int_t i=0; i<nr; i++) {
+ Double_t x=fSectors->GetX(i), ymax=fSectors->GetMaxY(i);
+ Double_t y;
+ if (!seed.GetYAt(x,GetBz(),y)) return 0;
+
+ if (y > ymax) {
+ s = (s+1) % fN;
+ if (!seed.Rotate(fSectors->GetAlpha())) return 0;
+ } else if (y <-ymax) {
+ s = (s-1+fN) % fN;
+ if (!seed.Rotate(-fSectors->GetAlpha())) return 0;
+ }
+
+ if (!seed.PropagateTo(x)) return 0;
+
+ AliTPCcluster *cl=0;
+ Int_t index=0;
+ Double_t maxchi2=kMaxCHI2;
+ Double_t pt=1./seed.Get1Pt();
+ Double_t sy2=AliTPCcluster::SigmaY2(seed.GetX(),seed.GetTgl(),pt);
+ Double_t sz2=AliTPCcluster::SigmaZ2(seed.GetX(),seed.GetTgl());
+ Double_t road=4.*sqrt(seed.GetSigmaY2() + sy2), z=seed.GetZ();
+ if (road>kMaxROAD) {
+ Warning("FollowBackProlongation","Too broad road !");
+ return 0;
+ }
+ Int_t accepted=seed.GetNumberOfClusters();
+ if (row==i) {
+ //try to accept already found cluster
+ AliTPCcluster *c=(AliTPCcluster*)GetCluster(idx);
+ Double_t chi2;
+ if ((chi2=seed.GetPredictedChi2(c))<maxchi2 || accepted<27) {
+ index=idx; cl=c; maxchi2=chi2;
+ } //else cerr<<"AliTPCtracker::FollowBackProlongation: oulier !\n";
+
+ if (nc--) {
+ idx=track.GetClusterIndex(nc);
+ sec=(idx&0xff000000)>>24; row=(idx&0x00ff0000)>>16;
+ }
+ if (fSectors==fInnerSec) { if (sec >= fkNIS) row=-1; }
+ else { if (sec < fkNIS) row=-1; }
+
+ }
+ if (!cl) {
+ //try to fill the gap
+ const AliTPCRow &krow=fSectors[s][i];
+ if (accepted>27)
+ if (krow) {
+ for (Int_t i=krow.Find(y-road); i<krow; i++) {
+ AliTPCcluster *c=(AliTPCcluster*)(krow[i]);
+ if (c->GetY() > y+road) break;
+ if (c->IsUsed()) continue;
+ if ((c->GetZ()-z)*(c->GetZ()-z)>16.*(seed.GetSigmaZ2()+sz2)) continue;
+ Double_t chi2=seed.GetPredictedChi2(c);
+ if (chi2 > maxchi2) continue;
+ maxchi2=chi2;
+ cl=c;
+ index=krow.GetIndex(i);
+ }
+ }
+ }
+
+ if (cl) {
+ Float_t l=fSectors->GetPadPitchWidth();
+ Float_t corr=1.; if (i>63) corr=0.67; // new (third) pad response !
+ seed.SetSampledEdx(cl->GetQ()/l*corr,seed.GetNumberOfClusters());
+ seed.Update(cl,maxchi2,index);
+ }
+
+ }
+
+ return 1;
}
//_____________________________________________________________________________
-void
-AliTPCtracker::MakeSeeds(TObjArray& seeds,const AliTPCSector *sec, Int_t max,
-Int_t i1, Int_t i2)
-{
+void AliTPCtracker::MakeSeeds(Int_t i1, Int_t i2) {
//-----------------------------------------------------------------
// This function creates track seeds.
//-----------------------------------------------------------------
Double_t x[5], c[15];
- Double_t alpha=sec->GetAlpha(), shift=sec->GetAlphaShift();
+ Double_t alpha=fSectors->GetAlpha(), shift=fSectors->GetAlphaShift();
Double_t cs=cos(alpha), sn=sin(alpha);
- Double_t x1 =sec->GetX(i1);
- Double_t xx2=sec->GetX(i2);
+ Double_t x1 =fSectors->GetX(i1);
+ Double_t xx2=fSectors->GetX(i2);
- for (Int_t ns=0; ns<max; ns++) {
- Int_t nl=sec[(ns-1+max)%max][i2];
- Int_t nm=sec[ns][i2];
- Int_t nu=sec[(ns+1)%max][i2];
- const AliTPCRow& kr1=sec[ns][i1];
+ for (Int_t ns=0; ns<fN; ns++) {
+ Int_t nl=fSectors[(ns-1+fN)%fN][i2];
+ Int_t nm=fSectors[ns][i2];
+ Int_t nu=fSectors[(ns+1)%fN][i2];
+ const AliTPCRow& kr1=fSectors[ns][i1];
for (Int_t is=0; is < kr1; is++) {
Double_t y1=kr1[is]->GetY(), z1=kr1[is]->GetZ();
for (Int_t js=0; js < nl+nm+nu; js++) {
const AliTPCcluster *kcl;
Double_t x2, y2, z2;
- Double_t x3=0.,y3=0.;
+ Double_t x3=GetX(), y3=GetY(), z3=GetZ();
if (js<nl) {
- const AliTPCRow& kr2=sec[(ns-1+max)%max][i2];
+ const AliTPCRow& kr2=fSectors[(ns-1+fN)%fN][i2];
kcl=kr2[js];
y2=kcl->GetY(); z2=kcl->GetZ();
x2= xx2*cs+y2*sn;
y2=-xx2*sn+y2*cs;
} else
if (js<nl+nm) {
- const AliTPCRow& kr2=sec[ns][i2];
+ const AliTPCRow& kr2=fSectors[ns][i2];
kcl=kr2[js-nl];
x2=xx2; y2=kcl->GetY(); z2=kcl->GetZ();
} else {
- const AliTPCRow& kr2=sec[(ns+1)%max][i2];
+ const AliTPCRow& kr2=fSectors[(ns+1)%fN][i2];
kcl=kr2[js-nl-nm];
y2=kcl->GetY(); z2=kcl->GetZ();
x2=xx2*cs-y2*sn;
y2=xx2*sn+y2*cs;
}
- Double_t zz=z1 - z1/x1*(x1-x2);
+ Double_t zz=z1 - (z1-z3)/(x1-x3)*(x1-x2);
if (TMath::Abs(zz-z2)>5.) continue;
Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
- if (d==0.) {cerr<<"MakeSeeds warning: Straight seed !\n"; continue;}
-
+ if (d==0.) {
+ Warning("MakeSeeds","Straight seed !");
+ continue;
+ }
x[0]=y1;
x[1]=z1;
- x[3]=f1(x1,y1,x2,y2,x3,y3);
- if (TMath::Abs(x[3]) >= 0.0066) continue;
+ x[4]=f1(x1,y1,x2,y2,x3,y3);
+ if (TMath::Abs(x[4]) >= 0.0066) continue;
x[2]=f2(x1,y1,x2,y2,x3,y3);
- //if (TMath::Abs(x[3]*x1-x[2]) >= 0.99999) continue;
- x[4]=f3(x1,y1,x2,y2,z1,z2);
- if (TMath::Abs(x[4]) > 1.2) continue;
+ //if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
+ x[3]=f3(x1,y1,x2,y2,z1,z2);
+ if (TMath::Abs(x[3]) > 1.2) continue;
Double_t a=asin(x[2]);
- Double_t zv=z1 - x[4]/x[3]*(a+asin(x[3]*x1-x[2]));
- if (TMath::Abs(zv)>10.) continue;
+ Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
+ if (TMath::Abs(zv-z3)>10.) continue;
Double_t sy1=kr1[is]->GetSigmaY2(), sz1=kr1[is]->GetSigmaZ2();
Double_t sy2=kcl->GetSigmaY2(), sz2=kcl->GetSigmaZ2();
- Double_t sy3=100*0.025, sy=0.1, sz=0.1;
+ //Double_t sy3=400*3./12., sy=0.1, sz=0.1;
+ Double_t sy3=25000*x[4]*x[4]+0.1, sy=0.1, sz=0.1;
- Double_t f30=(f1(x1,y1+sy,x2,y2,x3,y3)-x[3])/sy;
- Double_t f32=(f1(x1,y1,x2,y2+sy,x3,y3)-x[3])/sy;
- Double_t f34=(f1(x1,y1,x2,y2,x3,y3+sy)-x[3])/sy;
+ Double_t f40=(f1(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
+ Double_t f42=(f1(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
+ Double_t f43=(f1(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
Double_t f20=(f2(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
Double_t f22=(f2(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
- Double_t f24=(f2(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
- Double_t f40=(f3(x1,y1+sy,x2,y2,z1,z2)-x[4])/sy;
- Double_t f41=(f3(x1,y1,x2,y2,z1+sz,z2)-x[4])/sz;
- Double_t f42=(f3(x1,y1,x2,y2+sy,z1,z2)-x[4])/sy;
- Double_t f43=(f3(x1,y1,x2,y2,z1,z2+sz)-x[4])/sz;
+ Double_t f23=(f2(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
+ Double_t f30=(f3(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
+ Double_t f31=(f3(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
+ Double_t f32=(f3(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
+ Double_t f34=(f3(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
c[0]=sy1;
c[1]=0.; c[2]=sz1;
- c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f24*sy3*f24;
- c[6]=f30*sy1; c[7]=0.; c[8]=f30*sy1*f20+f32*sy2*f22+f34*sy3*f24;
- c[9]=f30*sy1*f30+f32*sy2*f32+f34*sy3*f34;
- c[10]=f40*sy1; c[11]=f41*sz1; c[12]=f40*sy1*f20+f42*sy2*f22;
- c[13]=f40*sy1*f30+f42*sy2*f32;
- c[14]=f40*sy1*f40+f41*sz1*f41+f42*sy2*f42+f43*sz2*f43;
-
- UInt_t index=kr1.GetIndex(is);
- AliTPCseed *track=new AliTPCseed(index, x, c, x1, ns*alpha+shift);
- Float_t l=sec->GetPadPitchWidth();
+ c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
+ c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
+ c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
+ c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
+ c[13]=f30*sy1*f40+f32*sy2*f42;
+ c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
+
+ Int_t index=kr1.GetIndex(is);
+ AliTPCseed *track=new AliTPCseed(x1, ns*alpha+shift, x, c, index);
+ Float_t l=fSectors->GetPadPitchWidth();
track->SetSampledEdx(kr1[is]->GetQ()/l,0);
- Int_t rc=FindProlongation(*track,sec,ns,i2);
- if (rc<0 || track->GetNumberOfClusters()<(i1-i2)/2) delete track;
- else seeds.AddLast(track);
+ Int_t rc=FollowProlongation(*track, i2);
+ if (rc==0 || track->GetNumberOfClusters()<(i1-i2)/2) delete track;
+ else fSeeds->AddLast(track);
}
}
}
}
//_____________________________________________________________________________
-Int_t AliTPCtracker::Clusters2Tracks(const AliTPCParam *par, TFile *of) {
+Int_t AliTPCtracker::ReadSeeds(const TFile *inp) {
//-----------------------------------------------------------------
- // This is a track finder.
+ // This function reades track seeds.
//-----------------------------------------------------------------
TDirectory *savedir=gDirectory;
- if (!of->IsOpen()) {
- cerr<<"AliTPCtracker::Clusters2Tracks(): output file not open !\n";
+ TFile *in=(TFile*)inp;
+ if (!in->IsOpen()) {
+ Error("ReadSeeds","Input file has not been open !");
return 1;
}
- AliTPCClustersArray carray;
- carray.Setup(par);
- carray.SetClusterType("AliTPCcluster");
- carray.ConnectTree("Segment Tree");
+ in->cd();
+ TTree *seedTree=(TTree*)in->Get("Seeds");
+ if (!seedTree) {
+ Error("ReadSeeds","Can't get a tree with track seeds !");
+ return 2;
+ }
+ AliTPCtrack *seed=new AliTPCtrack;
+ seedTree->SetBranchAddress("tracks",&seed);
+
+ if (fSeeds==0) fSeeds=new TObjArray(15000);
- of->cd();
- TTree tracktree("TreeT","Tree with TPC tracks");
- AliTPCtrack *iotrack=0;
- tracktree.Branch("tracks","AliTPCtrack",&iotrack,32000,0);
+ Int_t n=(Int_t)seedTree->GetEntries();
+ for (Int_t i=0; i<n; i++) {
+ seedTree->GetEvent(i);
+ seed->ResetClusters();
+ fSeeds->AddLast(new AliTPCseed(*seed));
+ }
+
+ delete seed;
- AliTPCSector::SetParam(par);
+ delete seedTree; //Thanks to Mariana Bondila
- const Int_t kNIS=par->GetNInnerSector()/2;
- AliTPCSSector *ssec=new AliTPCSSector[kNIS];
- Int_t nlow=ssec->GetNRows();
+ savedir->cd();
- const Int_t kNOS=par->GetNOuterSector()/2;
- AliTPCLSector *lsec=new AliTPCLSector[kNOS];
- Int_t nup=lsec->GetNRows();
-
- //Load outer sectors
- UInt_t index;
- Int_t i,j;
-
- j=Int_t(carray.GetTree()->GetEntries());
- for (i=0; i<j; i++) {
- AliSegmentID *s=carray.LoadEntry(i);
- Int_t sec,row;
- par->AdjustSectorRow(s->GetID(),sec,row);
- if (sec<kNIS*2) continue;
- AliTPCClustersRow *clrow=carray.GetRow(sec,row);
- Int_t ncl=clrow->GetArray()->GetEntriesFast();
- while (ncl--) {
- AliTPCcluster *c=(AliTPCcluster*)(*clrow)[ncl];
- index=(((sec<<8)+row)<<16)+ncl;
- lsec[(sec-kNIS*2)%kNOS][row].InsertCluster(c,index);
- }
- }
+ return 0;
+}
+
+//_____________________________________________________________________________
+Int_t AliTPCtracker::Clusters2Tracks(AliESDEvent *event) {
+ //-----------------------------------------------------------------
+ // This is a track finder.
+ // The clusters must be already loaded !
+ //-----------------------------------------------------------------
//find track seeds
- TObjArray seeds(20000);
+ Int_t nup=fOuterSec->GetNRows(), nlow=fInnerSec->GetNRows();
Int_t nrows=nlow+nup;
- Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
- MakeSeeds(seeds, lsec, kNOS, nup-1, nup-1-gap);
- MakeSeeds(seeds, lsec, kNOS, nup-1-shift, nup-1-shift-gap);
- seeds.Sort();
-
- //tracking in outer sectors
- Int_t nseed=seeds.GetEntriesFast();
- for (i=0; i<nseed; i++) {
- AliTPCseed *pt=(AliTPCseed*)seeds.UncheckedAt(i), &t=*pt;
- Double_t alpha=t.GetAlpha();
- if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
- if (alpha < 0. ) alpha += 2.*TMath::Pi();
- Int_t ns=Int_t(alpha/lsec->GetAlpha())%kNOS;
-
- if (FindProlongation(t,lsec,ns)) {
- t.UseClusters(&carray);
+ if (fSeeds==0) {
+ Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
+ fSectors=fOuterSec; fN=fkNOS;
+ fSeeds=new TObjArray(15000);
+ MakeSeeds(nup-1, nup-1-gap);
+ MakeSeeds(nup-1-shift, nup-1-shift-gap);
+ }
+ fSeeds->Sort();
+
+ Int_t nseed=fSeeds->GetEntriesFast();
+ for (Int_t i=0; i<nseed; i++) {
+ //tracking in the outer sectors
+ fSectors=fOuterSec; fN=fkNOS;
+
+ AliTPCseed *pt=(AliTPCseed*)fSeeds->UncheckedAt(i), &t=*pt;
+ if (!FollowProlongation(t)) {
+ delete fSeeds->RemoveAt(i);
continue;
}
- delete seeds.RemoveAt(i);
- }
-
- //unload outer sectors
- for (i=0; i<kNOS; i++) {
- for (j=0; j<nup; j++) {
- if (carray.GetRow(i+kNIS*2,j)) carray.ClearRow(i+kNIS*2,j);
- if (carray.GetRow(i+kNIS*2+kNOS,j)) carray.ClearRow(i+kNIS*2+kNOS,j);
+
+ //tracking in the inner sectors
+ fSectors=fInnerSec; fN=fkNIS;
+
+ Double_t alpha=t.GetAlpha() - fInnerSec->GetAlphaShift();
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+ Int_t ns=Int_t(alpha/fInnerSec->GetAlpha())%fkNIS;
+
+ alpha=ns*fInnerSec->GetAlpha()+fInnerSec->GetAlphaShift()-t.GetAlpha();
+
+ if (t.Rotate(alpha)) {
+ if (FollowProlongation(t)) {
+ if (t.GetNumberOfClusters() >= Int_t(0.4*nrows)) {
+ t.CookdEdx();
+ CookLabel(pt,0.1); //For comparison only
+ pt->PropagateTo(fParam->GetInnerRadiusLow());
+ AliESDtrack iotrack;
+ iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);
+
+ event->AddTrack(&iotrack);
+
+ UseClusters(&t);
+ }
}
+ }
+ delete fSeeds->RemoveAt(i);
}
- //load inner sectors
- j=Int_t(carray.GetTree()->GetEntries());
- for (i=0; i<j; i++) {
- AliSegmentID *s=carray.LoadEntry(i);
- Int_t sec,row;
- par->AdjustSectorRow(s->GetID(),sec,row);
- if (sec>=kNIS*2) continue;
- AliTPCClustersRow *clrow=carray.GetRow(sec,row);
- Int_t ncl=clrow->GetArray()->GetEntriesFast();
- while (ncl--) {
- AliTPCcluster *c=(AliTPCcluster*)(*clrow)[ncl];
- index=(((sec<<8)+row)<<16)+ncl;
- ssec[sec%kNIS][row].InsertCluster(c,index);
- }
+ Info("Clusters2Tracks","Number of found tracks : %d",
+ event->GetNumberOfTracks());
+
+ fSeeds->Clear(); delete fSeeds; fSeeds=0;
+
+ return 0;
+}
+
+//_____________________________________________________________________________
+Int_t AliTPCtracker::RefitInward(AliESDEvent* event) {
+ //
+ // The function propagates tracks throught TPC inward
+ // using already associated clusters.
+ // The clusters must be already loaded !
+ //
+
+ Int_t nTracks = event->GetNumberOfTracks();
+ Int_t nRefited = 0;
+
+ for (Int_t i = 0; i < nTracks; i++) {
+ AliESDtrack* track = event->GetTrack(i);
+ ULong_t status = track->GetStatus();
+
+ if ( (status & AliESDtrack::kTPCrefit) != 0 ) continue;
+ if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
+
+ if ( (status & AliESDtrack::kTRDout ) != 0 )
+ if ( (status & AliESDtrack::kTRDrefit ) == 0 ) continue;
+
+ AliTPCtrack* tpcTrack = new AliTPCtrack(*track);
+ AliTPCseed* seed=new AliTPCseed(*tpcTrack); seed->ResetClusters();
+
+ if ( (status & AliESDtrack::kTRDrefit) == 0 ) seed->ResetCovariance(10.);
+
+ fSectors = fOuterSec;
+
+ Int_t res = FollowRefitInward(seed, tpcTrack);
+ UseClusters(seed);
+ Int_t nc = seed->GetNumberOfClusters();
+
+ fSectors = fInnerSec;
+
+ res = FollowRefitInward(seed, tpcTrack);
+ UseClusters(seed, nc);
+
+ if (res) {
+ seed->PropagateTo(fParam->GetInnerRadiusLow());
+ seed->SetLabel(tpcTrack->GetLabel());
+ seed->SetdEdx(tpcTrack->GetdEdx());
+ track->UpdateTrackParams(seed, AliESDtrack::kTPCrefit);
+ nRefited++;
+ }
+
+ delete seed;
+ delete tpcTrack;
}
- //tracking in inner sectors
- Int_t found=0;
- for (i=0; i<nseed; i++) {
- AliTPCseed *pt=(AliTPCseed*)seeds.UncheckedAt(i), &t=*pt;
- if (!pt) continue;
- Int_t nc=t.GetNumberOfClusters();
+ Info("RefitInward","Number of refitted tracks : %d",nRefited);
+
+ return 0;
+}
+
+Int_t AliTPCtracker::PropagateBack(AliESDEvent *event) {
+ //-----------------------------------------------------------------
+ // This function propagates tracks back through the TPC.
+ // The clusters must be already loaded !
+ //-----------------------------------------------------------------
+ Int_t nentr=event->GetNumberOfTracks();
+ Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
+
+ Int_t ntrk=0;
+ for (Int_t i=0; i<nentr; i++) {
+ AliESDtrack *esd=event->GetTrack(i);
+ ULong_t status=esd->GetStatus();
+
+ if ( (status & AliESDtrack::kTPCin ) == 0 ) continue;
+ if ( (status & AliESDtrack::kTPCout) != 0 ) continue;
+ if ( (status & AliESDtrack::kITSin) != 0 )
+ if ( (status & AliESDtrack::kITSout) == 0 ) continue;
+
+ const AliTPCtrack t(*esd);
+ AliTPCseed s(t); s.ResetClusters();
+
+ if ( (status & AliESDtrack::kITSout) == 0 ) s.ResetCovariance(10.);
- Double_t alpha=t.GetAlpha() - ssec->GetAlphaShift();
+ //inner sectors
+ fSectors=fInnerSec; fN=fkNIS;
+
+ Double_t alpha=s.GetAlpha() - fSectors->GetAlphaShift();
if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
if (alpha < 0. ) alpha += 2.*TMath::Pi();
- Int_t ns=Int_t(alpha/ssec->GetAlpha())%kNIS;
+ Int_t ns=Int_t(alpha/fSectors->GetAlpha())%fN;
+ alpha =ns*fSectors->GetAlpha() + fSectors->GetAlphaShift();
+ alpha-=s.GetAlpha();
- alpha=ns*ssec->GetAlpha() + ssec->GetAlphaShift() - t.GetAlpha();
+ if (!s.Rotate(alpha)) continue;
+ if (!FollowBackProlongation(s,t)) continue;
- if (t.Rotate(alpha)) {
- if (FindProlongation(t,ssec,ns)) {
- if (t.GetNumberOfClusters() >= Int_t(0.4*nrows)) {
- t.CookdEdx();
- //t.CookLabel(&carray);
- iotrack=pt;
- tracktree.Fill();
- t.UseClusters(&carray,nc);
- cerr<<found++<<'\r';
- }
- }
+ UseClusters(&s);
+
+ //outer sectors
+ fSectors=fOuterSec; fN=fkNOS;
+
+ Int_t nc=s.GetNumberOfClusters();
+
+ alpha=s.GetAlpha() - fSectors->GetAlphaShift();
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+ ns=Int_t(alpha/fSectors->GetAlpha())%fN;
+
+ alpha =ns*fSectors->GetAlpha() + fSectors->GetAlphaShift();
+ alpha-=s.GetAlpha();
+
+ if (!s.Rotate(alpha)) continue;
+ if (!FollowBackProlongation(s,t)) continue;
+ {
+ Int_t nrows=fOuterSec->GetNRows()+fInnerSec->GetNRows();
+ if (s.GetNumberOfClusters() < Int_t(0.4*nrows)) continue;
}
- delete seeds.RemoveAt(i);
- }
- tracktree.Write();
-
- //unload inner sectors
- for (i=0; i<kNIS; i++) {
- for (j=0; j<nlow; j++) {
- if (carray.GetRow(i,j)) carray.ClearRow(i,j);
- if (carray.GetRow(i+kNIS,j)) carray.ClearRow(i+kNIS,j);
- }
+ s.PropagateTo(fParam->GetOuterRadiusUp());
+ s.CookdEdx();
+ CookLabel(&s,0.1); //For comparison only
+ UseClusters(&s,nc);
+ esd->UpdateTrackParams(&s,AliESDtrack::kTPCout);
+ ntrk++;
}
+ Info("PropagateBack","Number of back propagated tracks: %d",ntrk);
- cerr<<"Number of found tracks : "<<found<<endl;
+ return 0;
+}
- delete[] ssec;
- delete[] lsec;
+//_________________________________________________________________________
+AliCluster *AliTPCtracker::GetCluster(Int_t index) const {
+ //--------------------------------------------------------------------
+ // Return pointer to a given cluster
+ //--------------------------------------------------------------------
+ Int_t sec=(index&0xff000000)>>24;
+ Int_t row=(index&0x00ff0000)>>16;
+ Int_t ncl=(index&0x0000ffff)>>00;
+
+ const AliTPCcluster *cl=0;
+
+ if (sec<fkNIS) {
+ cl=fInnerSec[sec][row].GetUnsortedCluster(ncl);
+ } else {
+ sec-=fkNIS;
+ cl=fOuterSec[sec][row].GetUnsortedCluster(ncl);
+ }
- savedir->cd();
+ return (AliCluster*)cl;
+}
- return 0;
+//__________________________________________________________________________
+void AliTPCtracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
+ //--------------------------------------------------------------------
+ //This function "cooks" a track label. If label<0, this track is fake.
+ //--------------------------------------------------------------------
+ Int_t noc=t->GetNumberOfClusters();
+ Int_t *lb=new Int_t[noc];
+ Int_t *mx=new Int_t[noc];
+ AliCluster **clusters=new AliCluster*[noc];
+
+ Int_t i;
+ for (i=0; i<noc; i++) {
+ lb[i]=mx[i]=0;
+ Int_t index=t->GetClusterIndex(i);
+ clusters[i]=GetCluster(index);
+ }
+
+ Int_t lab=123456789;
+ for (i=0; i<noc; i++) {
+ AliCluster *c=clusters[i];
+ lab=TMath::Abs(c->GetLabel(0));
+ Int_t j;
+ for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
+ lb[j]=lab;
+ (mx[j])++;
+ }
+
+ Int_t max=0;
+ for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
+
+ for (i=0; i<noc; i++) {
+ AliCluster *c=clusters[i];
+ if (TMath::Abs(c->GetLabel(1)) == lab ||
+ TMath::Abs(c->GetLabel(2)) == lab ) max++;
+ }
+
+ if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
+
+ else {
+ Int_t tail=Int_t(0.10*noc);
+ max=0;
+ for (i=1; i<=tail; i++) {
+ AliCluster *c=clusters[noc-i];
+ if (lab == TMath::Abs(c->GetLabel(0)) ||
+ lab == TMath::Abs(c->GetLabel(1)) ||
+ lab == TMath::Abs(c->GetLabel(2))) max++;
+ }
+ if (max < Int_t(0.5*tail)) lab=-lab;
+ }
+
+ t->SetLabel(lab);
+
+ delete[] lb;
+ delete[] mx;
+ delete[] clusters;
+}
+
+//_________________________________________________________________________
+void AliTPCtracker::AliTPCSector::Setup(const AliTPCParam *par, Int_t f) {
+ //-----------------------------------------------------------------------
+ // Setup inner sector
+ //-----------------------------------------------------------------------
+ if (f==0) {
+ fAlpha=par->GetInnerAngle();
+ fAlphaShift=par->GetInnerAngleShift();
+ fPadPitchWidth=par->GetInnerPadPitchWidth();
+ f1PadPitchLength=par->GetInnerPadPitchLength();
+ f2PadPitchLength=f1PadPitchLength;
+
+ fN=par->GetNRowLow();
+ fRow=new AliTPCRow[fN];
+ for (Int_t i=0; i<fN; i++) fRow[i].SetX(par->GetPadRowRadiiLow(i));
+ } else {
+ fAlpha=par->GetOuterAngle();
+ fAlphaShift=par->GetOuterAngleShift();
+ fPadPitchWidth=par->GetOuterPadPitchWidth();
+ f1PadPitchLength=par->GetOuter1PadPitchLength();
+ f2PadPitchLength=par->GetOuter2PadPitchLength();
+
+ fN=par->GetNRowUp();
+ fRow=new AliTPCRow[fN];
+ for (Int_t i=0; i<fN; i++){
+ fRow[i].SetX(par->GetPadRowRadiiUp(i));
+ }
+ }
}
//_________________________________________________________________________
-void
-AliTPCtracker::AliTPCRow::InsertCluster(const AliTPCcluster* c, UInt_t index) {
+void AliTPCtracker::
+AliTPCRow::InsertCluster(const AliTPCcluster* c, Int_t sec, Int_t row) {
//-----------------------------------------------------------------------
// Insert a cluster into this pad row in accordence with its y-coordinate
//-----------------------------------------------------------------------
- if (fN==kMAXCLUSTER) {
- cerr<<"AliTPCRow::InsertCluster(): Too many clusters !\n"; return;
+ if (fN==kMaxClusterPerRow) {
+ ::Error("InsertCluster","Too many clusters !");
+ return;
}
- if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
+
+ Int_t index=(((sec<<8)+row)<<16)+fN;
+
+ if (fN==0) {
+ fSize=kMaxClusterPerRow/8;
+ fClusterArray=new AliTPCcluster[fSize];
+ fIndex[0]=index;
+ fClusterArray[0]=*c; fClusters[fN++]=fClusterArray;
+ return;
+ }
+
+ if (fN==fSize) {
+ Int_t size=fSize*2;
+ AliTPCcluster *buff=new AliTPCcluster[size];
+ memcpy(buff,fClusterArray,fSize*sizeof(AliTPCcluster));
+ for (Int_t i=0; i<fN; i++)
+ fClusters[i]=buff+(fClusters[i]-fClusterArray);
+ delete[] fClusterArray;
+ fClusterArray=buff;
+ fSize=size;
+ }
+
Int_t i=Find(c->GetY());
memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTPCcluster*));
memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
- fIndex[i]=index; fClusters[i]=c; fN++;
+ fIndex[i]=index;
+ fClusters[i]=fClusterArray+fN; fClusterArray[fN++]=*c;
}
//___________________________________________________________________
//-----------------------------------------------------------------------
// Return the index of the nearest cluster
//-----------------------------------------------------------------------
+ if(fN<=0) return 0;
if (y <= fClusters[0]->GetY()) return 0;
if (y > fClusters[fN-1]->GetY()) return fN;
Int_t b=0, e=fN-1, m=(b+e)/2;
// This funtion calculates dE/dX within the "low" and "up" cuts.
//-----------------------------------------------------------------
Int_t i;
+ Int_t nc=GetNumberOfClusters();
Int_t swap;//stupid sorting
do {
swap=0;
- for (i=0; i<fN-1; i++) {
- if (fdEdx[i]<=fdEdx[i+1]) continue;
- Float_t tmp=fdEdx[i]; fdEdx[i]=fdEdx[i+1]; fdEdx[i+1]=tmp;
+ for (i=0; i<nc-1; i++) {
+ if (fdEdxSample[i]<=fdEdxSample[i+1]) continue;
+ Float_t tmp=fdEdxSample[i];
+ fdEdxSample[i]=fdEdxSample[i+1]; fdEdxSample[i+1]=tmp;
swap++;
}
} while (swap);
- Int_t nl=Int_t(low*fN), nu=Int_t(up*fN);
+ Int_t nl=Int_t(low*nc), nu=Int_t(up*nc);
Float_t dedx=0;
- for (i=nl; i<=nu; i++) dedx += fdEdx[i];
+ for (i=nl; i<=nu; i++) dedx += fdEdxSample[i];
dedx /= (nu-nl+1);
SetdEdx(dedx);
-}
-//_____________________________________________________________________________
-void AliTPCtracker::AliTPCseed::UseClusters(AliTPCClustersArray *ca, Int_t n) {
- //-----------------------------------------------------------------
- // This function marks clusters associated with this track.
- //-----------------------------------------------------------------
- Int_t sec,row,ncl;
- for (Int_t i=n; i<fN; i++) {
- GetCluster(i,sec,row,ncl);
- AliTPCClustersRow *clrow=ca->GetRow(sec,row);
- AliTPCcluster *c=(AliTPCcluster*)(*clrow)[ncl];
- c->Use();
- }
+ return;
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff