X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TPC%2FAliTPCtrack.cxx;h=42c78d0732137ed7b12fd3a968d404edc8ad0f9c;hb=c55ca9e5ff7ba48642d44e3cc714cd5d35693441;hp=c754a8c47997ba36f2663c3852a956f35c850409;hpb=1936493934365ed89c915ea283ff553376bffc14;p=u%2Fmrichter%2FAliRoot.git

diff --git a/TPC/AliTPCtrack.cxx b/TPC/AliTPCtrack.cxx
index c754a8c4799..42c78d07321 100644
--- a/TPC/AliTPCtrack.cxx
+++ b/TPC/AliTPCtrack.cxx
@@ -13,35 +13,31 @@
  * provided "as is" without express or implied warranty.                  *
  **************************************************************************/
 
-/*
-$Log$
-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
-//
-// 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 <Riostream.h>
 
 #include "AliTPCtrack.h"
-#include "AliTPCcluster.h"
-#include "AliTPCClustersRow.h"
-#include "AliTPCClustersArray.h"
+#include "AliCluster.h"
+#include "AliBarrelTrack.h"
+#include "AliESDtrack.h"
 
 ClassImp(AliTPCtrack)
 
+//_________________________________________________________________________
+AliTPCtrack::AliTPCtrack(): AliKalmanTrack() 
+{
+  fX = fP0 = fP1 = fP2 = fP3 = fP3 = fP4 = 0.0;
+  fAlpha = fdEdx = 0.0;
+  fNWrong = fNRotation = fNumber = 0;  // [SR, 01.04.2003]
+}
+
 //_________________________________________________________________________
 AliTPCtrack::AliTPCtrack(UInt_t index, const Double_t xx[5],
 const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
@@ -64,19 +60,26 @@ const Double_t cc[15], Double_t xref, Double_t alpha) : AliKalmanTrack() {
 
   fIndex[0]=index;
   SetNumberOfClusters(1);
-
+  //
+  //MI
+  fSdEdx      = 0;
+  fNFoundable = 0;
+  fBConstrain = 0;
+  fLastPoint  = 0;
+  fFirstPoint = 0;
+  fRemoval    = 0;
+  fTrackType  = 0;
+  fLab2       = 0;
 }
 
 //_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) {
+AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) :
+AliKalmanTrack(t) {
   //-----------------------------------------------------------------
   // Conversion AliKalmanTrack -> AliTPCtrack.
   //-----------------------------------------------------------------
-  SetLabel(t.GetLabel());
   SetChi2(0.);
-  SetMass(t.GetMass());
   SetNumberOfClusters(0);
-  //SetConvConst(t.GetConvConst());
 
   fdEdx  = 0.;
   fAlpha = alpha;
@@ -105,7 +108,69 @@ AliTPCtrack::AliTPCtrack(const AliKalmanTrack& t,Double_t alpha) {
   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];
+  //
+  //MI
+  fSdEdx      = 0;
+  fNFoundable = 0;
+  fBConstrain = 0;
+  fLastPoint  = 0;
+  fFirstPoint = 0;
+  fRemoval    = 0;
+  fTrackType  = 0;
+  fLab2       = 0;
+}
 
+//_____________________________________________________________________________
+AliTPCtrack::AliTPCtrack(const AliESDtrack& t) : AliKalmanTrack() {
+  //-----------------------------------------------------------------
+  // Conversion AliESDtrack -> AliTPCtrack.
+  //-----------------------------------------------------------------
+  SetNumberOfClusters(t.GetTPCclusters(fIndex));
+  SetLabel(t.GetLabel());
+  SetMass(t.GetMass());
+
+  fdEdx  = t.GetTPCsignal();
+  fAlpha = t.GetAlpha();
+  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];
+
+  if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return;
+  StartTimeIntegral();
+  Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times);
+  SetIntegratedLength(t.GetIntegratedLength());
+  //
+  //MI
+  fSdEdx      = 0;
+  fNFoundable = 0;
+  fBConstrain = 0;
+  fLastPoint  = 0;
+  fFirstPoint = 0;
+  fRemoval    = 0;
+  fTrackType  = 0;
+  fLab2       = 0;
 }
 
 //_____________________________________________________________________________
@@ -125,10 +190,53 @@ AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : AliKalmanTrack(t) {
   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;
 
-  Int_t n=GetNumberOfClusters();
-  for (Int_t i=0; i<n; i++) fIndex[i]=t.fIndex[i];
+  //Int_t n=GetNumberOfClusters();
+  for (Int_t i=0; i<kMaxRow; i++) fIndex[i]=t.fIndex[i];
+  //
+  //MI 
+  fSdEdx      = t.fSdEdx;
+  fNFoundable = t.fNFoundable;
+  fBConstrain = t.fBConstrain;
+  fLastPoint  = t.fLastPoint;
+  fFirstPoint = t.fFirstPoint;
+  fRemoval    = t.fRemoval ;
+  fTrackType  = t.fTrackType;
+  fLab2       = t.fLab2;
+
 }
+//_____________________________________________________________________________
+
+void  AliTPCtrack::GetBarrelTrack(AliBarrelTrack *track) {
+  //
+  // Create a Barrel Track out of this track
+  // Current track is propagated to the reference plane
+  // by the tracker
+  //
+  // [SR, 01.04.2003]
+  
+  if (!track) return;
+  Double_t xr, vec[5], cov[15];
+
+  track->SetLabel(GetLabel());
+  track->SetX(fX, fAlpha);
+  track->SetNClusters(GetNumberOfClusters(), GetChi2());
+  Double_t times[10];
+  GetIntegratedTimes(times);
+  track->SetTime(times, GetIntegratedLength());
+
+  track->SetMass(GetMass());
+  track->SetdEdX(GetdEdx());
 
+  track->SetNWrongClusters(fNWrong);
+  track->SetNRotate(fNRotation);
+
+  GetExternalParameters(xr, vec);
+  track->SetStateVector(vec);
+  
+  GetExternalCovariance(cov);
+  track->SetCovarianceMatrix(cov);
+
+}
 //_____________________________________________________________________________
 Int_t AliTPCtrack::Compare(const TObject *o) const {
   //-----------------------------------------------------------------
@@ -186,16 +294,37 @@ Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const
   return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
 }
 
+Double_t AliTPCtrack::GetYat(Double_t xk) const {
+//-----------------------------------------------------------------
+// This function calculates the Y-coordinate of a track at the plane x=xk.
+//-----------------------------------------------------------------
+    Double_t c1=fP4*fX - fP2, r1=TMath::Sqrt(1.- c1*c1);
+    Double_t c2=fP4*xk - fP2;
+    if (c2*c2>0.99999) {
+       Int_t n=GetNumberOfClusters();
+       if (n>4) cerr<<n<<"AliTPCtrack::GetYat: can't evaluate the y-coord !\n";
+       return 1e10;
+    } 
+    Double_t r2=TMath::Sqrt(1.- c2*c2);
+    return fP0 + (xk-fX)*(c1+c2)/(r1+r2);
+}
+
 //_____________________________________________________________________________
-Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho) {
+Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t /*x0*/,Double_t rho) {
   //-----------------------------------------------------------------
   // This function propagates a track to a reference plane x=xk.
   //-----------------------------------------------------------------
-  if (TMath::Abs(fP4*xk - fP2) >= 0.99999) {
-    Int_t n=GetNumberOfClusters();
-    if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
+  if (TMath::Abs(fP4*xk - fP2) >= 0.9) {
+    //    Int_t n=GetNumberOfClusters();
+    //if (n>4) cerr<<n<<" AliTPCtrack warning: Propagation failed !\n";
     return 0;
   }
+  
+  // old position for time [SR, GSI 17.02.2003]
+  Double_t oldX = fX;
+  Double_t oldY = fP0;
+  Double_t oldZ = fP1;
+  //
 
   Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=fP0, z1=fP1;
   Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1);
@@ -245,21 +374,49 @@ Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho) {
 
   Double_t ey=fP4*fX - fP2, ez=fP3;
   Double_t xz=fP4*ez, zz1=ez*ez+1, xy=fP2+ey;
-
+    
   fC22 += (2*ey*ez*ez*fP2+1-ey*ey+ez*ez+fP2*fP2*ez*ez)*theta2;
   fC32 += ez*zz1*xy*theta2;
   fC33 += zz1*zz1*theta2;
   fC42 += xz*ez*xy*theta2;
   fC43 += xz*zz1*theta2;
   fC44 += xz*xz*theta2;
-
+  /*
+  //
+  //MI coeficints
+  Double_t dc22 = (1-ey*ey+xz*xz*fX*fX)*theta2;
+  Double_t dc32 = (xz*fX*zz1)*theta2;
+  Double_t dc33 = (zz1*zz1)*theta2;
+  Double_t dc42 = (xz*fX*xz)*theta2;
+  Double_t dc43 = (zz1*xz)*theta2;
+  Double_t dc44 = (xz*xz)*theta2; 
+  fC22 += dc22;
+  fC32 += dc32;
+  fC33 += dc33;
+  fC42 += dc42;
+  fC43 += dc43;
+  fC44 += dc44;
+  */
   //Energy losses************************
   Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
   if (x1 < x2) dE=-dE;
   cc=fP4;
+
+  //Double_t E = sqrt(p2+GetMass()*GetMass());
+  //Double_t mifac  = TMath::Sqrt(1.+dE*dE/p2+2*E*dE/p2)-1;
+  //Double_t belfac = E*dE/p2;
+			       //
   fP4*=(1.- sqrt(p2+GetMass()*GetMass())/p2*dE);
   fP2+=fX*(fP4-cc);
 
+  // Integrated Time [SR, GSI, 17.02.2003]
+ if (x1 < x2)
+ if (IsStartedTimeIntegral()) {
+    Double_t l2 = (fX-oldX)*(fX-oldX)+(fP0-oldY)*(fP0-oldY)+(fP1-oldZ)*(fP1-oldZ);
+    AddTimeStep(TMath::Sqrt(l2));
+  }
+  //
+
   return 1;
 }
 
@@ -281,6 +438,14 @@ Int_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, UInt_t index) {
   //-----------------------------------------------------------------
   // This function associates a cluster with this track.
   //-----------------------------------------------------------------
+
+  // 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;
@@ -294,9 +459,9 @@ Int_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, UInt_t index) {
 
   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<<n<<" AliTPCtrack warning: Filtering failed !\n";
+  if (TMath::Abs(cur*fX-eta) >= 0.9) {
+    //    Int_t n=GetNumberOfClusters();
+    //if (n>4) cerr<<n<<" AliTPCtrack warning: Filtering failed !\n";
     return 0;
   }
 
@@ -339,6 +504,9 @@ Int_t AliTPCtrack::Rotate(Double_t alpha)
   //-----------------------------------------------------------------
   // This function rotates this track.
   //-----------------------------------------------------------------
+
+  if (alpha != 0) fNRotation++;  // [SR, 01.04.2003]
+
   fAlpha += alpha;
   if (fAlpha<-TMath::Pi()) fAlpha += 2*TMath::Pi();
   if (fAlpha>=TMath::Pi()) fAlpha -= 2*TMath::Pi();
@@ -410,3 +578,93 @@ void AliTPCtrack::ResetCovariance() {
   fC40=0.;  fC41=0.;  fC42=0.;  fC43=0.;  fC44*=10.;
 
 }
+
+////////////////////////////////////////////////////////////////////////
+Double_t AliTPCtrack::Phi() const {
+//
+//
+//
+  Double_t phi =  TMath::ASin(GetSnp()) + fAlpha;
+  if (phi<0) phi+=2*TMath::Pi();
+  if (phi>=2*TMath::Pi()) phi-=2*TMath::Pi();
+  return phi;
+}
+////////////////////////////////////////////////////////////////////////
+
+
+
+////////////////////////////////////////////////////////////////////////
+// MI ADDITION
+
+Float_t AliTPCtrack::Density(Int_t row0, Int_t row1)
+{
+  //
+  // calculate cluster density
+  Int_t good  = 0;
+  Int_t found = 0;
+  //if (row0<fFirstPoint) row0 = fFirstPoint;
+  if (row1>fLastPoint) row1 = fLastPoint;
+
+  
+  for (Int_t i=row0;i<=row1;i++){ 
+    //    Int_t index = fClusterIndex[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;
+}
+
+
+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;
+}
+
+
+Double_t AliTPCtrack::GetZat0() const
+{
+  //
+  // return virtual z - supposing that x = 0
+  if (TMath::Abs(fP2)>1) return 0;
+  if (TMath::Abs(fX*fP4-fP2)>1) return 0;
+  Double_t vz = fP1+fP3/fP4*(asin(-fP2)-asin(fX*fP4-fP2));
+  return vz;
+}
+
+
+Double_t AliTPCtrack::GetD(Double_t x, Double_t y) const {
+  //------------------------------------------------------------------
+  // This function calculates the transverse impact parameter
+  // with respect to a point with global coordinates (x,y)
+  //------------------------------------------------------------------
+  //Double_t xt=fX, yt=fP0;
+
+  Double_t sn=TMath::Sin(fAlpha), cs=TMath::Cos(fAlpha);
+  Double_t a = x*cs + y*sn;
+  y = -x*sn + y*cs; x=a;
+  //
+  Double_t r  = TMath::Abs(1/fP4);
+  Double_t x0 = TMath::Abs(fP2*r);
+  Double_t y0 = fP0;
+  y0= fP0+TMath::Sqrt(1-(fP4*fX-fP2)*(fP4*fX-fP2))/fP4;
+  
+  Double_t  delta = TMath::Sqrt((x-x0)*(x-x0)+(y-y0)*(y-y0));  
+  //  Double_t  delta = TMath::Sqrt(TMath::Abs(x*x-2*x0*x+x0*x0+ y*y-2*y*y0+y0*y0));
+  delta -= TMath::Abs(r);
+  return delta;  
+}