NcTrack.cxx

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#include "NcTrack.h"
#include "Riostream.h"
 
ClassImp(NcTrack); // Class implementation to enable ROOT I/O
 
NcTrack::NcTrack() : TNamed(),Nc4Vector()
{
 
 Init();
 Reset();
}

void NcTrack::Init()
{
 
 fDecays=0;
 fSignals=0;
 fHypotheses=0;
 fBegin=0;
 fEnd=0;
 fRef=0;
 fImpactXY=0;
 fImpactXZ=0;
 fImpactYZ=0;
 fClosest=0;
 fParent=0;
 fFit=0;
 fTstamp=0;
 fEscale=1;
 fTemp=0;
 fHypCopy=1;
}

NcTrack::~NcTrack()
{
 
 Int_t nsig=GetNsignals();
 for (Int_t i=1; i<=nsig; i++)
 {
  NcSignal* s=GetSignal(i);
  if (s) s->RemoveTrack(*this,0);
 }
 
 Int_t nhyp=GetNhypotheses();
 for (Int_t j=1; j<=nhyp; j++)
 {
  NcTrack* tx=GetTrackHypothesis(j);
  if (tx)
  {
   NcTrack* parent=tx->GetParentTrack();
   if (parent==this) tx->SetParentTrack(0);
  }
 }
 
 NcTrack* parent=GetParentTrack();
 if (parent) parent->RemoveTrackHypothesis(*this);
 
 if (fDecays)
 {
  delete fDecays;
  fDecays=0;
 }
 if (fSignals)
 {
  delete fSignals;
  fSignals=0;
 }
 if (fHypotheses)
 {
  delete fHypotheses;
  fHypotheses=0;
 }
 if (fBegin)
 {
  delete fBegin;
  fBegin=0;
 }
 if (fEnd)
 {
  delete fEnd;
  fEnd=0;
 }
 if (fRef)
 {
  delete fRef;
  fRef=0;
 }
 if (fImpactXY)
 {
  delete fImpactXY;
  fImpactXY=0;
 }
 if (fImpactXZ)
 {
  delete fImpactXZ;
  fImpactXZ=0;
 }
 if (fImpactYZ)
 {
  delete fImpactYZ;
  fImpactYZ=0;
 }
 if (fClosest)
 {
  delete fClosest;
  fClosest=0;
 }
 if (fFit)
 {
  delete fFit;
  fFit=0;
 }
 if (fTstamp)
 {
  delete fTstamp;
  fTstamp=0;
 }
 if (fTemp)
 {
  delete fTemp;
  fTemp=0;
 }
}

NcTrack::NcTrack(const NcTrack& t) : TNamed(t),Nc4Vector(t)
{
 
 Init();
 
 fQ=t.fQ;
 fProb=t.fProb;
 if (t.fBegin) fBegin=new NcPositionObj(*(t.fBegin));
 if (t.fEnd) fEnd=new NcPositionObj(*(t.fEnd));
 if (t.fRef) fRef=new NcPositionObj(*(t.fRef));
 if (t.fImpactXY) fImpactXY=new NcPositionObj(*(t.fImpactXY));
 if (t.fImpactXZ) fImpactXZ=new NcPositionObj(*(t.fImpactXZ));
 if (t.fImpactYZ) fImpactYZ=new NcPositionObj(*(t.fImpactYZ));
 if (t.fClosest) fClosest=new NcPositionObj(*(t.fClosest));
 if (t.fFit) fFit=t.fFit->Clone();
 if (t.fTstamp) fTstamp=new NcTimestamp(*(t.fTstamp));
 fUserId=t.fUserId;
 fEscale=t.fEscale;
 fCode=t.fCode;
 fParent=t.fParent;
 fHypCopy=t.fHypCopy;
 
 Int_t ndec=t.GetNdecay();
 if (ndec)
 {
  fDecays=new TObjArray(ndec);
  fDecays->SetOwner();
  for (Int_t it=1; it<=ndec; it++)
  {
   NcTrack* tx=t.GetDecayTrack(it);
   fDecays->Add(new NcTrack(*tx));
  }
 }
 
 Int_t nsig=t.GetNsignals();
 if (nsig)
 {
  fSignals=new TObjArray(nsig);
  for (Int_t is=1; is<=nsig; is++)
  {
   NcSignal* sx=t.GetSignal(is);
   fSignals->Add(sx);
  }
 }
 
 Int_t nhyp=t.GetNhypotheses();
 if (nhyp)
 {
  fHypotheses=new TObjArray(nhyp);
  if (fHypCopy) fHypotheses->SetOwner();
  for (Int_t ih=1; ih<=nhyp; ih++)
  {
   NcTrack* tx=t.GetTrackHypothesis(ih);
   if (tx) AddTrackHypothesis(*tx);
  }
 }
}

void NcTrack::Reset()
{
 
 fQ=0;
 fUserId=0;
 fCode=0;
 fProb=0;
 SetZero();
 fParent=0;
 if (fDecays)
 {
  delete fDecays;
  fDecays=0;
 }
 if (fSignals)
 {
  delete fSignals;
  fSignals=0;
 }
 if (fHypotheses)
 {
  delete fHypotheses;
  fHypotheses=0;
 }
 if (fBegin)
 {
  delete fBegin;
  fBegin=0;
 }
 if (fEnd)
 {
  delete fEnd;
  fEnd=0;
 }
 if (fRef)
 {
  delete fRef;
  fRef=0;
 }
 if (fImpactXY)
 {
  delete fImpactXY;
  fImpactXY=0;
 }
 if (fImpactXZ)
 {
  delete fImpactXZ;
  fImpactXZ=0;
 }
 if (fImpactYZ)
 {
  delete fImpactYZ;
  fImpactYZ=0;
 }
 if (fClosest)
 {
  delete fClosest;
  fClosest=0;
 }
 if (fFit)
 {
  delete fFit;
  fFit=0;
 }
 if (fTstamp)
 {
  delete fTstamp;
  fTstamp=0;
 }
}

void NcTrack::Set3Momentum(Nc3Vector& p)
{
 
 Set3Vector(p);
 Double_t inv=GetInvariant();
 if (inv<0) SetMass(0.);
}

void NcTrack::Set4Momentum(Nc4Vector& p)
{
 
 Double_t E=p.GetScalar();
 Double_t dE=p.GetResultError();
 Nc3Vector pv=p.Get3Vector();
 SetVector(E,pv);
 SetScalarError(dE);
}

void NcTrack::SetMass(Double_t m,Double_t dm)
{
 
 Double_t inv=pow(m,2);
 Double_t dinv=fabs(2.*m*dm);
 SetInvariant(inv,dinv);
}

void NcTrack::SetCharge(Float_t q)
{
 
 fQ=q;
}

void NcTrack::Data(TString f,TString u)
{
 
 Double_t m=GetMass();
 Double_t dm=GetResultError();
 const char* name=GetName();
 const char* title=GetTitle();
 
 cout << " *" << ClassName() << "::Data*";
 if (strlen(name))  cout << " Name : " << name;
 if (strlen(title)) cout << " Title : " << title;
 cout << endl;
 if (fTstamp) fTstamp->Date(1);
 cout << " Id : " << fUserId << " Code : " << fCode
      << " m : " << m << " dm : " << dm << " Charge : " << fQ
      << " p : " << GetMomentum() << endl;
 cout << " Nhypotheses : " << GetNhypotheses() << " Ndecay-tracks : " << GetNdecay()
      << " Nsignals : " << GetNsignals() << " Energy scale : " << fEscale << " GeV" << endl;
 if (fParent)
 {
  cout << " Parent track Id : " << fParent->GetId() << " Code : " << fParent->GetParticleCode()
       << " m : " << fParent->GetMass() << " Q : " << fParent->GetCharge()
       << " p : " << fParent->GetMomentum();
  const char* pname=fParent->GetName();
  const char* ptitle=fParent->GetTitle();
  if (strlen(pname))  cout << " Name : " << pname;
  if (strlen(ptitle)) cout << " Title : " << ptitle;
  cout << endl;
 }
 if (fFit)
 {
  cout << " Fit details present in object of class " << fFit->ClassName() << endl; 
  if (fFit->InheritsFrom("NcSignal")) ((NcSignal*)fFit)->List(-1);
 }
 Nc4Vector::Data(f,u); 
} 

void NcTrack::List(TString f,TString u)
{
 
 Data(f,u); // Information of the current track
 if (fBegin) { cout << " Begin-point :"; fBegin->Data(f,u); }
 if (fEnd)   { cout << " End-point   :"; fEnd->Data(f,u); }
 if (fRef)   { cout << " Ref-point   :"; fRef->Data(f,u); }
 
 // Decay products of this track
 NcTrack* td; 
 for (Int_t id=1; id<=GetNdecay(); id++)
 {
  td=GetDecayTrack(id);
  if (td)
  {
   cout << "  ---Level 1 sec. track no. " << id << endl;
   td->Data(f,u); 
  }
  else
  {
   cout << " *NcTrack::List* Error : Empty decay track slot." << endl; 
  }
 }
} 

void NcTrack::ListAll(TString f,TString u)
{
 
 Data(f,u); // Information of the current track
 if (fBegin) { cout << " Begin-point :"; fBegin->Data(f,u); }
 if (fEnd)   { cout << " End-point   :"; fEnd->Data(f,u); }
 if (fRef)   { cout << " Ref-point   :"; fRef->Data(f,u); }
 
 Int_t nhyp=GetNhypotheses();
 if (nhyp)
 {
  cout << " List of the " << nhyp << " track hypotheses : " << endl;
  for (Int_t ih=1; ih<=nhyp; ih++)
  {
   NcTrack* tx=GetTrackHypothesis(ih);
   if (tx) tx->Data(f,u);
  }
 }
 
 ShowSignals("TObject",2,2,f,u);
 
 NcTrack* t=this;
 Dumps(t,1,f,u); // Information of all decay products
}

void NcTrack::Dumps(NcTrack* t,Int_t n,TString f,TString u)
{
 
 NcTrack* td; 
 for (Int_t id=1; id<=t->GetNdecay(); id++)
 {
  td=t->GetDecayTrack(id);
  if (td)
  {
   cout << "  ---Level " << n << " sec. track no. " << id << endl;
   td->Data(f,u); 
 
   Int_t nhyp=td->GetNhypotheses();
   if (nhyp)
   {
    cout << " List of the " << nhyp << " track hypotheses : " << endl;
    for (Int_t ih=1; ih<=nhyp; ih++)
    {
     NcTrack* tx=td->GetTrackHypothesis(ih);
     if (tx) tx->Data(f,u);
    }
   }
 
   Int_t nsig=td->GetNsignals();
   if (nsig)
   {
    cout << " List of the " << nsig << " related signals : " << endl;
    for (Int_t is=1; is<=nsig; is++)
    {
     NcSignal* sx=td->GetSignal(is);
     if (sx) sx->Data(f,u);
    }
   }
 
   // Go for next decay level of this decay track recursively
   Dumps(td,n+1,f,u);
  }
  else
  {
   cout << " *NcTrack::Dumps* Error : Empty decay track slot." << endl; 
  }
 }
} 

Double_t NcTrack::GetMomentum(Float_t scale)
{
 
 Double_t norm=fV.GetNorm();
 fDresult=fV.GetResultError();
 if (scale>0)
 {
  norm*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 return norm;
}

Nc3Vector NcTrack::Get3Momentum(Float_t scale) const
{
 
 Nc3Vector p=Get3Vector();
 if (scale>0) p*=fEscale/scale;
 return p;
}

Double_t NcTrack::GetMass(Float_t scale)
{
 
 Double_t inv=GetInvariant();
 Double_t dinv=GetResultError();
 Double_t dm=0;
 if (inv >= 0)
 {
 Double_t m=sqrt(inv);
 if (m) dm=dinv/(2.*m);
 if (scale>0)
 {
  m*=fEscale/scale;
  dm*=fEscale/scale;
 }
 fDresult=dm;
 return m;
 }
 else
 {
  cout << "*NcTrack::GetMass* Unphysical situation m**2 = " << inv << endl;
  cout << " Value 0 will be returned." << endl;
  fDresult=dm;
  return 0;
 }
}

Float_t NcTrack::GetCharge() const
{
 
 return fQ;
}

Double_t NcTrack::GetEnergy(Float_t scale)
{
 
 Double_t E=GetScalar();
 if (E>0)
 {
  if (scale>0)
  {
   E*=fEscale/scale;
   fDresult*=fEscale/scale;
  }
  return E;
 }
 else
 {
  cout << "*NcTrack::GetEnergy* Unphysical situation E = " << E << endl;
  cout << " Value 0 will be returned." << endl;
  return 0;
 }
}

void NcTrack::Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms)
{
 
 Double_t M=GetMass();
 
// Compute the 4-momenta of the decay products in the cms
// Note : p2=p1=pnorm for a 2-body decay
 Double_t e1=0;
 if (M) e1=((M*M)+(m1*m1)-(m2*m2))/(2.*M);
 Double_t e2=0;
 if (M) e2=((M*M)+(m2*m2)-(m1*m1))/(2.*M);
 Double_t pnorm=(e1*e1)-(m1*m1);
 if (pnorm>0.)
 {
  pnorm=sqrt(pnorm);
 }
 else
 {
  pnorm=0;
 }
 
 Double_t a[3];
 a[0]=pnorm;
 a[1]=thcms;
 a[2]=phicms;
 Nc3Vector p;
 p.SetVector(a,"sph");
 
 Nc4Vector pprim1;
 pprim1.SetVector(e1,p);
 pprim1.SetInvariant(m1*m1);
 
 Nc4Vector pprim2;
 p*=-1;
 pprim2.SetVector(e2,p);
 pprim2.SetInvariant(m2*m2);
 
 // Determine boost parameters from the parent particle
 Double_t E=GetEnergy();
 p=Get3Vector();
 Nc4Vector pmu;
 pmu.SetVector(E,p);
 
 NcBoost q;
 q.Set4Momentum(pmu);
 
 Nc4Vector p1=q.Inverse(pprim1); // Boost decay product 1
 Nc4Vector p2=q.Inverse(pprim2); // Boost decay product 2
 
 // Enter the boosted data into the decay tracks array
 if (fDecays)
 {
  delete fDecays;
  fDecays=0;
 }
 fDecays=new TObjArray(2);
 fDecays->SetOwner();
 
 fDecays->Add(new NcTrack);
 ((NcTrack*)fDecays->At(0))->Set4Momentum(p1);
 ((NcTrack*)fDecays->At(0))->SetMass(m1);
 fDecays->Add(new NcTrack);
 ((NcTrack*)fDecays->At(1))->Set4Momentum(p2);
 ((NcTrack*)fDecays->At(1))->SetMass(m2);
}

Int_t NcTrack::GetNdecay() const
{
 
 Int_t ndec=0;
 if (fDecays) ndec=fDecays->GetEntries();
 return ndec;
}

NcTrack* NcTrack::GetDecayTrack(Int_t j) const
{
 
 if (!fDecays)
 {
  cout << " *NcTrack::GetDecayTrack* No tracks present." << endl;
  return 0;
 }
 else
 {
  if ((j >= 1) && (j <= GetNdecay()))
  {
   return (NcTrack*)fDecays->At(j-1);
  }
  else
  {
   cout << " *NcTrack* decay track number : " << j << " out of range."
        << " Ndec = " << GetNdecay() << endl;
   return 0;  
  }
 }
}

void NcTrack::RemoveDecays()
{
 
 if (fDecays)
 {
  delete fDecays;
  fDecays=0;
 }
}

void NcTrack::AddSignal(NcSignal& s,Int_t mode)
{
 
 if (!fSignals) fSignals=new TObjArray(1);
 
 // Check if this signal is already stored for this track
 Int_t nsig=GetNsignals();
 for (Int_t i=0; i<nsig; i++)
 {
  if (&s==fSignals->At(i)) return; 
 }
 
 fSignals->Add(&s);
 if (mode==1) s.AddTrack(*this,0);
}

void NcTrack::RemoveSignal(NcSignal& s,Int_t mode)
{
 
 if (fSignals)
 {
  NcSignal* test=(NcSignal*)fSignals->Remove(&s);
  if (test) fSignals->Compress();
 }
 if (mode==1) s.RemoveTrack(*this,0);
}

void NcTrack::RemoveSignals(Int_t mode)
{
 
 if (!fSignals) return;
 
 Int_t ns=GetNsignals();
 for (Int_t i=0; i<ns; i++)
 {
  NcSignal* sx=(NcSignal*)fSignals->At(i);
  if (sx && mode==1) sx->RemoveTrack(*this,0);
 }
 
 delete fSignals;
 fSignals=0;
}

Int_t NcTrack::GetNsignals() const
{
 
 Int_t nsig=0;
 if (fSignals) nsig=fSignals->GetEntries();
 return nsig;
}

Int_t NcTrack::GetNsignals(const char* classname,Int_t par) const
{
 
 Int_t nsigs=0;
 for (Int_t isig=1; isig<=GetNsignals(); isig++)
 {
  NcSignal* sx=GetSignal(isig);
  if (!sx) continue;
 
  if ((par==0 || par==2) && sx->InheritsFrom(classname))
  {
   nsigs++;
   continue;
  }
  
  NcDevice* parent=sx->GetDevice();
  if (!parent) continue;
 
  if ((par==1 || par==2) && parent->InheritsFrom(classname)) nsigs++;
 }
 return nsigs;
} 

NcSignal* NcTrack::GetSignal(Int_t j) const
{
 
 if (!fSignals)
 {
  cout << " *NcTrack::GetSignal* No signals present." << endl;
  return 0;
 }
 else
 {
  if ((j >= 1) && (j <= GetNsignals()))
  {
   return (NcSignal*)fSignals->At(j-1);
  }
  else
  {
   cout << " *NcTrack* signal number : " << j << " out of range."
        << " Nsig = " << GetNsignals() << endl;
   return 0;
  }
 }
}

TObjArray* NcTrack::GetSignals(const char* classname,Int_t par,TObjArray* signals)
{
 
 if (signals)
 {
  signals->Clear();
 }
 else
 {
  if (fTemp)
  {
   fTemp->Clear();
  }
  else
  {
   fTemp=new TObjArray();
  }
 }
 
 // Generic array pointer to be used in the logic below
 TObjArray* arr=0;
 if (signals)
 {
  arr=signals;
 }
 else
 {
  arr=fTemp;
 }
 
 for (Int_t isig=1; isig<=GetNsignals(); isig++)
 {
  NcSignal* sx=GetSignal(isig);
  if (!sx) continue;
 
  if ((par==0 || par==2) && sx->InheritsFrom(classname))
  {
   arr->Add(sx);
   continue;
  }
  
  NcDevice* parent=sx->GetDevice();
  if (!parent) continue;
 
  if ((par==1 || par==2) && parent->InheritsFrom(classname)) arr->Add(sx);
 }
 
 if (signals)
 {
  return 0;
 }
 else
 {
  return fTemp;
 }
} 

void NcTrack::ShowSignals(const char* classname,Int_t par,Int_t mode,TString f,TString u)
{
 
 TObjArray hits;
 GetSignals(classname,par,&hits);
 
 Int_t nhits=hits.GetEntries();
 
 cout << " *NcTrack::ShowSignals* There are " << nhits
      << " signals recorded for (device) class " << classname << endl;
 
 if (!nhits || !mode) return;
 
 NcPosition r;
 for (Int_t i=0; i<nhits; i++)
 {
  NcSignal* sx=(NcSignal*)hits.At(i);
  if (sx) sx->Data(f,u);
  if (mode==2)
  {
   NcDevice* dev=(NcDevice*)sx->GetDevice();
   if (!dev) continue;
   r=dev->GetPosition();
   cout << "   Device Position";
   r.Data(f,u);
  }
 }
}

Double_t NcTrack::GetSignalValue(TString classname,TString varname,Int_t mode,Int_t par)
{
 
 TObjArray hits;
 GetSignals(classname.Data(),par,&hits);
 
 Int_t nhits=hits.GetEntries();
 
 if (!nhits) return 0;
 
 Double_t val=0;
 for (Int_t i=0; i<nhits; i++)
 {
  NcSignal* sx=(NcSignal*)hits.At(i);
  if (!sx) continue;
  val+=sx->GetSignal(varname,mode);
 }
 
 return val;
}

void NcTrack::SetHypCopy(Int_t flag)
{
 
 if (!fHypotheses)
 {
  if (flag==0 || flag==1)
  {
   fHypCopy=flag;
  }
  else
  {
   cout << " *" << ClassName() << "::SetHypCopy* Invalid argument : " << flag << endl;
  }
 }
}

Int_t NcTrack::GetHypCopy() const
{
 
 return fHypCopy;
}

void NcTrack::AddTrackHypothesis(NcTrack& t)
{
 
 if (!fHypotheses)
 {
  fHypotheses=new TObjArray(1);
  if (fHypCopy) fHypotheses->SetOwner();
 }
 
 t.SetParentTrack(this);
 
 if (fHypCopy)
 {
  fHypotheses->Add(t.Clone());
 }
 else
 {
  fHypotheses->Add(&t);
 }
}

void NcTrack::AddTrackHypothesis(Double_t prob,Double_t m,Double_t dm)
{
 
 NcTrack* t=new NcTrack(*this);
 t->RemoveDecays();
 t->RemoveTrackHypotheses();
 t->RemoveSignals();
 t->SetTitle("Mass hypothesis");
 t->SetMass(m,dm);
 t->SetProb(prob);
 AddTrackHypothesis(*t);
 if (fHypCopy) delete t;
}

void NcTrack::RemoveTrackHypothesis(NcTrack& t)
{
 
 if (fHypotheses)
 {
  NcTrack* test=(NcTrack*)fHypotheses->Remove(&t);
  if (test)
  {
   if (fHypCopy) delete test;
   fHypotheses->Compress();
  }
 }
}

void NcTrack::RemoveTrackHypotheses()
{
 
 if (fHypotheses)
 {
  delete fHypotheses;
  fHypotheses=0;
 }
}

Int_t NcTrack::GetNhypotheses() const
{
 
 Int_t nhyp=0;
 if (fHypotheses) nhyp=fHypotheses->GetEntries();
 return nhyp;
}

NcTrack* NcTrack::GetTrackHypothesis(Int_t j) const
{
 
 if (!fHypotheses) return 0;
 
 Int_t nhyp=GetNhypotheses();
 
 // Check validity of index j
 if (j<0 || j>nhyp)
 {
   cout << " *NcTrack* hypothesis number : " << j << " out of range."
        << " Nhyp = " << nhyp << endl;
   return 0;
 } 
 
 NcTrack* t=0;
 
 if (j==0) // Provide track hypothesis with highest probability
 {
  Float_t prob=0;   
  t=(NcTrack*)fHypotheses->At(0);
  if (t) prob=t->GetProb();
  Float_t probx=0;
  for (Int_t ih=1; ih<nhyp; ih++)
  {
   NcTrack* tx=(NcTrack*)fHypotheses->At(ih);
   if (tx)
   {
    probx=tx->GetProb();
    if (probx > prob) t=tx; 
   }
  }
  return t;
 }
 else // Provide requested j-th track hypothesis
 {
  return (NcTrack*)fHypotheses->At(j-1);
 }
}

void NcTrack::SetBeginPoint(NcPosition& p)
{
 
 if (fBegin) delete fBegin;
 fBegin=new NcPositionObj(p);
}

NcPosition* NcTrack::GetBeginPoint()
{
 
 return fBegin;
}

void NcTrack::SetEndPoint(NcPosition& p)
{
 
 if (fEnd) delete fEnd;
 fEnd=new NcPositionObj(p);
}

NcPosition* NcTrack::GetEndPoint()
{
 
 return fEnd;
}

void NcTrack::SetReferencePoint(NcPosition& p)
{
 
 if (fRef) delete fRef;
 fRef=new NcPositionObj(p);
}

NcPosition* NcTrack::GetReferencePoint()
{
 
 return fRef;
}

void NcTrack::SetMass()
{
 
 Double_t m=0,dm=0;
 
 // Select mass hypothesis with highest probability
 NcTrack* t=GetTrackHypothesis(0);
 if (t) 
 {
  m=t->GetMass();
  dm=t->GetResultError();
  SetMass(m,dm);
 }
 else
 {
  cout << " *NcTrack::SetMass()* No hypothesis present => No action." << endl;
 }
}

Double_t NcTrack::GetPt(Float_t scale)
{
 
 Nc3Vector v;
 v=GetVecTrans();
 Double_t norm=v.GetNorm();
 fDresult=v.GetResultError();
 if (scale>0)
 {
  norm*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 
 return norm;
}

Double_t NcTrack::GetPl(Float_t scale)
{
 
 Nc3Vector v;
 v=GetVecLong();
 
 Double_t pl=v.GetNorm();
 fDresult=v.GetResultError();
 
 Double_t a[3];
 v.GetVector(a,"sph");
 if (cos(a[1])<0) pl=-pl;
 if (scale>0)
 {
  pl*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 
 return pl;
}

Double_t NcTrack::GetEt(Float_t scale)
{
 
 Double_t et=GetScaTrans();
 if (scale>0)
 {
  et*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 
 return et;
}

Double_t NcTrack::GetEl(Float_t scale)
{
 
 Double_t el=GetScaLong();
 if (scale>0)
 {
  el*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 
 return el;
}

Double_t NcTrack::GetMt(Float_t scale)
{
 
 Double_t pt=GetPt();
 Double_t dpt=GetResultError();
 Double_t m=GetMass();
 Double_t dm=GetResultError();
 
 Double_t mt=sqrt(pt*pt+m*m);
 Double_t dmt2=0;
 if (mt) dmt2=(pow((pt*dpt),2)+pow((m*dm),2))/(mt*mt);
 
 fDresult=sqrt(dmt2);
 if (scale>0)
 {
  mt*=fEscale/scale;
  fDresult*=fEscale/scale;
 }
 return mt;
}

Double_t NcTrack::GetRapidity()
{
 
 Double_t e=GetEnergy();
 Double_t de=GetResultError();
 Double_t pl=GetPl();
 Double_t dpl=GetResultError();
 Double_t sum=e+pl;
 Double_t dif=e-pl;
 
 Double_t y=9999,dy2=0;
 if (sum && dif) y=0.5*log(sum/dif);
 
 if (sum*dif) dy2=(1./(sum*dif))*(pow((pl*de),2)+pow((e*dpl),2));
 
 fDresult=sqrt(dy2);
 return y;
}

void NcTrack::SetImpactPoint(NcPosition& p,TString q)
{
 
 Int_t axis=0;
 if (q=="x" || q=="X") axis=1;
 if (q=="y" || q=="Y") axis=2;
 if (q=="z" || q=="Z") axis=3;
 
 switch (axis)
 {
  case 1: // Impact-point in the plane X=0
   if (fImpactYZ) delete fImpactYZ;
   fImpactYZ=new NcPositionObj(p);
   break;
 
  case 2: // Impact-point in the plane Y=0
   if (fImpactXZ) delete fImpactXZ;
   fImpactXZ=new NcPositionObj(p);
   break;
 
  case 3: // Impact-point in the plane Z=0
   if (fImpactXY) delete fImpactXY;
   fImpactXY=new NcPositionObj(p);
   break;
 
  default: // Unsupported axis
   cout << "*NcTrack::SetImpactPoint* Unsupported axis : " << q << endl
        << " Possible axes are 'X', 'Y' and 'Z'." << endl; 
   break;
 }
}

NcPosition* NcTrack::GetImpactPoint(TString q)
{
 
 Int_t axis=0;
 if (q=="x" || q=="X") axis=1;
 if (q=="y" || q=="Y") axis=2;
 if (q=="z" || q=="Z") axis=3;
 
 switch (axis)
 {
  case 1: // Impact-point in the plane X=0
   return fImpactYZ;
 
  case 2: // Impact-point in the plane Y=0
   return fImpactXZ;
 
  case 3: // Impact-point in the plane Z=0
   return fImpactXY;
 
  default: // Unsupported axis
   cout << "*NcTrack::GetImpactPoint* Unsupported axis : " << q << endl
        << " Possible axes are 'X', 'Y' and 'Z'." << endl; 
   return 0;
 }
}

void NcTrack::SetId(Int_t id)
{
 
 fUserId=id;
}

Int_t NcTrack::GetId() const
{
 
 return fUserId;
}

void NcTrack::SetClosestPoint(NcPosition& p)
{
 
 if (fClosest) delete fClosest;
 fClosest=new NcPositionObj(p);
}

NcPosition* NcTrack::GetClosestPoint()
{
 
 return fClosest;
}

void NcTrack::SetEscale(Float_t scale)
{
 
 if (scale>0)
 {
  fEscale=scale;
 }
 else
 {
  cout << " *NcTrack::SetEscale* Invalid scale value : " << scale << endl;
 }
}

Float_t NcTrack::GetEscale() const
{
 
 return fEscale;
}

void NcTrack::SetParticleCode(Int_t code)
{
 
 fCode=code;
}

Int_t NcTrack::GetParticleCode() const
{
 
 return fCode;
}

void NcTrack::SetParentTrack(NcTrack* t)
{
 
 fParent=t;
}

NcTrack* NcTrack::GetParentTrack()
{
 
 return fParent;
}

void NcTrack::SetProb(Double_t prob)
{
 
 fProb=prob;
}

Float_t NcTrack::GetProb() const
{
 
 return fProb;
}

void NcTrack::SetFitDetails(TObject* obj)
{
 
 if (fFit)
 {
  delete fFit;
  fFit=0;
 }
 
 if (obj) fFit=obj->Clone();
}

TObject* NcTrack::GetFitDetails()
{
 
 return fFit;
}

void NcTrack::SetTimestamp(NcTimestamp& t)
{
 
 if (fTstamp) delete fTstamp;
 fTstamp=new NcTimestamp(t);
}

NcTimestamp* NcTrack::GetTimestamp()
{
 
 return fTstamp;
}

void NcTrack::RemoveTimestamp()
{
 
 if (fTstamp)
 {
  delete fTstamp;
  fTstamp=0;
 }
}

Double_t NcTrack::GetDistance(NcPosition* p,Float_t scale)
{
 
 Double_t dist=-1.;
 fDresult=0.;
 
 if (!p) return dist;
 
 // Obtain a defined position on this track
 NcPosition* rx=fRef;
 if (!rx) rx=fBegin;
 if (!rx) rx=fEnd;
 
 if (!rx) return dist;
 
 Nc3Vector p1=Get3Momentum();
 
 if (p1.GetNorm() <= 0.) return dist;
 
 Nc3Vector r0=(Nc3Vector)(*rx);
 
 Float_t tscale=rx->GetUnitScale();
 Float_t pscale=p->GetUnitScale();
 if ((tscale/pscale > 1.1) || (pscale/tscale > 1.1)) r0=r0*(tscale/pscale);
 
 // Obtain the direction unit vector of this track
 Double_t vec[3];
 Double_t err[3];
 p1.GetVector(vec,"sph");
 p1.GetErrors(err,"sph");
 vec[0]=1.;
 err[0]=0.;
 p1.SetVector(vec,"sph");
 p1.SetErrors(err,"sph");
 
 Nc3Vector q=(Nc3Vector)(*p);
 Nc3Vector r=q-r0;
 Nc3Vector d=r.Cross(p1);
 dist=d.GetNorm();
 fDresult=d.GetResultError();
 if (scale>0)
 {
  dist*=pscale/scale;
  fDresult*=pscale/scale;
 }
 return dist;
}

Double_t NcTrack::GetDistance(NcTrack* t,Float_t scale)
{
 
 Double_t dist=-1.;
 fDresult=0.;
 
 if (!t) return dist;
 
 // Obtain a defined position on this track
 NcPosition* rx=fRef;
 if (!rx) rx=fBegin;
 if (!rx) rx=fEnd;
 
 if (!rx) return dist;
 
 // Obtain a defined position on track t
 NcPosition* ry=t->GetReferencePoint();
 if (!ry) ry=t->GetBeginPoint();
 if (!ry) ry=t->GetEndPoint();
 
 if (!ry) return dist;
 
 Nc3Vector p1=Get3Momentum();
 Nc3Vector p2=t->Get3Momentum();
 
 if (p1.GetNorm() <= 0. || p2.GetNorm() <= 0.) return dist;
 
 // The vector normal to both track directions
 Nc3Vector n=p1.Cross(p2);
 
 Float_t scalex=rx->GetUnitScale();
 Float_t scaley=ry->GetUnitScale();
 
 if (n.GetNorm() > 1.e-10)
 {
  // Normalise n to a unit vector
  Double_t vec[3];
  Double_t err[3];
  n.GetVector(vec,"sph");
  n.GetErrors(err,"sph");
  vec[0]=1.;
  err[0]=0.;
  n.SetVector(vec,"sph");
  n.SetErrors(err,"sph");
  Nc3Vector r1=(Nc3Vector)(*rx);
  Nc3Vector r2=(Nc3Vector)(*ry);
  // Correct components of r2 in case of different unit scales
  if ((scaley/scalex > 1.1) || (scalex/scaley > 1.1)) r2=r2*(scaley/scalex);
  Nc3Vector r=r1-r2;
  dist=fabs(r.Dot(n));
  fDresult=r.GetResultError();
 }
 else // Parallel tracks
 {
  dist=t->GetDistance(rx);
  fDresult=t->GetResultError();
 }
 
 if (scale>0)
 {
  dist*=scalex/scale;
  fDresult*=scalex/scale;
 }
 return dist;
}

TObject* NcTrack::Clone(const char* name) const
{
 
 NcTrack* trk=new NcTrack(*this);
 if (name)
 {
  if (strlen(name)) trk->SetName(name);
 }
 return trk;
}