Debugger output in AliPHOSReconstructioner

[u/mrichter/AliRoot.git] / PHOS / AliPHOSPIDv1.cxx

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/* $Id$ */

//_________________________________________________________________________
// Implementation version v1 of the PHOS particle identifier 
// Identification is based on information from PPSD and EMC
//                  
//*-- Author: Yves Schutz (SUBATECH)


// --- ROOT system ---

// --- Standard library ---

#include <iostream.h>

// --- AliRoot header files ---

#include "AliPHOSPIDv1.h"
#include "AliPHOSTrackSegment.h"
#include "AliPHOSRecParticle.h"
#include "AliPHOSIndexToObject.h"

ClassImp( AliPHOSPIDv1) 

//____________________________________________________________________________
void  AliPHOSPIDv1::MakeParticles(TrackSegmentsList * trsl, RecParticlesList * rpl)
{
  // Makes a RecParticle out of a TrackSegment

  TIter next(trsl) ; 
  AliPHOSTrackSegment * tracksegment ; 
  Int_t index = 0 ; 
  AliPHOSRecParticle * rp ; 
  Int_t type ; 

  while ( (tracksegment = (AliPHOSTrackSegment *)next()) ) {
    new( (*rpl)[index] ) AliPHOSRecParticle(tracksegment) ;
    rp = (AliPHOSRecParticle *)rpl->At(index) ; 

    // try to figure out the type of particle:
    //    1. just looking at the PPSD information 
    
    if( tracksegment->GetPpsdUpRecPoint() == 0 ) {     // Neutral
      
      if( tracksegment->GetPpsdLowRecPoint() == 0 )    // Neutral  
	type = kNEUTRAL ;   
      else {    // check the shower profile       
	AliPHOSEmcRecPoint * recp = tracksegment->GetEmcRecPoint() ; 
	Float_t * lambda = new Float_t[2]; 
	recp->GetElipsAxis(lambda) ; 
	if ( ( lambda[0] > fLambda1m && lambda[0] < fLambda1M ) && // shower profile cut
	     ( lambda[1] > fLambda2m && lambda[1] < fLambda2M ) )	
	  type = kGAMMA ;                      // a well identified photon 
	else 
	  type = kGAMMAHADRON ;                // looks like a photon but is a hadron (most likely)  
      }
    } // Neutral
    else                            // Charged           
      type = kCHARGED ;   
    
    //   2. from the shower profile analysis
    if ( type == kNEUTRAL ) { 
      AliPHOSEmcRecPoint * recp = tracksegment->GetEmcRecPoint() ; 
      Float_t * lambda = new Float_t[2]; 
      recp->GetElipsAxis(lambda) ; 
      if ( ( lambda[0] > fLambda1m && lambda[0] < fLambda1M ) && // shower profile cut
	   ( lambda[1] > fLambda2m && lambda[1] < fLambda2M ) )
	type = kNEUTRALEM ; 
      else 
	type = kNEUTRALHADRON ; 
      delete lambda ; 
   }

    //   3. from the shower dispersion 
    if (type == kCHARGED) { 
      
      if( tracksegment->GetEmcRecPoint()->GetDispersion() > fCutOnDispersion)  // shower dispersion cut
	type = kCHARGEDHADRON ;
	//     else  
	//	type = kELECTRON ; 
    } 
    rp->SetType(type) ; 
    index++ ; 
  }
    
}

//____________________________________________________________________________
void  AliPHOSPIDv1:: Print() 
{
  // Print the parameters used for the particle type identification
  
  cout << "AliPHOSPIDv1 : cuts for the particle idendification based on the shower profile " << endl 
       << fLambda1m << " < value1 < " << fLambda1M << endl 
       << fLambda2m << " < value2 < " << fLambda2M << endl ;  

}

//____________________________________________________________________________
void  AliPHOSPIDv1::SetShowerProfileCuts(Float_t l1m, Float_t l1M, Float_t l2m, Float_t l2M)
{
  // Modifies the parameters used for the particle type identification

  fLambda1m = l1m ; 
  fLambda1M = l1M ; 
  fLambda2m = l2m ; 
  fLambda2M = l2M ; 
}