Adding reverse engineering tool

[u/mrichter/AliRoot.git] / PHOS / AliPHOSPIDv1.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.                                    *
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 * documentation strictly for non-commercial purposes is hereby granted   *
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 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
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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)  & Gines Martinez (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(AliPHOSTrackSegment::TrackSegmentsList * trsl, 
				  AliPHOSRecParticle::RecParticlesList * rpl)
{
  // Makes a RecParticle out of a TrackSegment

  TIter next(trsl) ; 
  AliPHOSTrackSegment * tracksegment ; 
  Int_t index = 0 ; 
  AliPHOSRecParticle * rp ; 
  Int_t type ; 
  Int_t shower_profile;  // 0 narrow and 1 wide
  Int_t cpv_detector;  // 1 hit and 0 no hit
  Int_t pc_detector;  // 1 hit and 0 no hit

  while ( (tracksegment = (AliPHOSTrackSegment *)next()) ) {
    new( (*rpl)[index] ) AliPHOSRecParticle(tracksegment) ;
    rp = (AliPHOSRecParticle *)rpl->At(index) ; 
    AliPHOSEmcRecPoint * recp = tracksegment->GetEmcRecPoint() ; 
    Float_t * lambda = new Float_t[2]; 
    recp->GetElipsAxis(lambda) ; 

 // Looking at the lateral development of the shower
    if ( ( lambda[0] > fLambda1m && lambda[0] < fLambda1M ) && // shower profile cut
	 ( lambda[1] > fLambda2m && lambda[1] < fLambda2M ) )	      shower_profile = 0 ;   // NARROW PROFILE   
    else      shower_profile = 1 ;// WIDE PROFILE
  
    // Looking at the photon conversion detector
    if( tracksegment->GetPpsdLowRecPoint() == 0 )   pc_detector = 0;  // No hit
    else      pc_detector = 1;  // hit
  
    // Looking at the photon conversion detector
    if( tracksegment->GetPpsdUpRecPoint() == 0 )         cpv_detector = 0;  // No hit
    else      cpv_detector = 1;  // Hit
     
    type = shower_profile + 2*pc_detector + 4*cpv_detector;
    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 ; 
}