Added 2 methos to retrieve the primary particles

[u/mrichter/AliRoot.git] / PHOS / AliPHOSRecParticle.cxx

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 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
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 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
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/* $Id$ */
//_________________________________________________________________________
//  A Reconstructed Particle in PHOS    
//  To become a general class of AliRoot ?       
//  Why should I put meaningless comments
//  just to satisfy
//  the code checker                 
//       
//*-- Author: Yves Schutz (SUBATECH)


// --- ROOT system ---

// --- Standard library ---


// --- AliRoot header files ---

#include "AliPHOSRecParticle.h"
#include "AliPHOSGetter.h" 
#include "TParticle.h"

ClassImp(AliPHOSRecParticle)


//____________________________________________________________________________
 AliPHOSRecParticle::AliPHOSRecParticle(const AliPHOSRecParticle & rp)
{
  // copy ctor

  fPHOSTrackSegment = rp.fPHOSTrackSegment ; 
  fType             = rp.fType ; 
  fIndexInList      = rp.fIndexInList ;

  fPdgCode     = rp.fPdgCode;
  fStatusCode  = rp.fStatusCode;
  fMother[0]   = rp.fMother[0];
  fMother[1]   = rp.fMother[1];
  fDaughter[0] = rp.fDaughter[0];
  fDaughter[1] = rp.fDaughter[1];
  fWeight      = rp.fWeight;
  fCalcMass    = rp.fCalcMass;
  fPx          = rp.fPx;
  fPy          = rp.fPy;
  fPz          = rp.fPz;
  fE           = rp.fE;
  fVx          = rp.fVx;
  fVy          = rp.fVy;
  fVz          = rp.fVz;
  fVt          = rp.fVt;
  fPolarTheta  = rp.fPolarTheta;
  fPolarPhi    = rp.fPolarPhi;
  fParticlePDG = rp.fParticlePDG; 
  
}

//____________________________________________________________________________
const Int_t AliPHOSRecParticle::GetNPrimaries() const  
{ 

  Int_t rv = 0 ;
  AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ; 
  gime->EmcRecPoint(gime->TrackSegment(GetPHOSTSIndex())->GetEmcIndex())->GetPrimaries(rv) ; 
  return rv ; 
}

//____________________________________________________________________________
const TParticle * AliPHOSRecParticle::GetPrimary(Int_t index) const  
{
  if ( index > GetNPrimaries() ) 
    cout << "WARNING : AliPHOSRecParticle::GetPrimary -> " << index << " is larger that the number of primaries " 
	 <<  GetNPrimaries() << endl ; 
  else { 
    Int_t dummy ; 
    AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ; 
    Int_t primaryindex = gime->EmcRecPoint(gime->TrackSegment(GetPHOSTSIndex())->GetEmcIndex())->GetPrimaries(dummy)[index] ; 
    if (primaryindex >= 10000000) 
      cout << "WARNING : AliPHOSRecParticle::GetPrimary -> not a signal primary" << endl ; 
    else 
      return gime->Primary(primaryindex) ; 
  }
  return 0 ; 
}