GammaRayTelDigitizer.cc

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//
// $Id$
// ------------------------------------------------------------
//      GEANT 4 class implementation file
//      CERN Geneva Switzerland
//
//
//      ------------ GammaRayTelDigitizer  ------
//           by   F.Longo, R.Giannitrapani & G.Santin (13 nov 2000)
//
// ************************************************************

#include <vector>

#include "GammaRayTelDigitizer.hh"
#include "GammaRayTelDigi.hh"
#include "GammaRayTelDigitizerMessenger.hh"

#include "GammaRayTelTrackerHit.hh"
#include "GammaRayTelCalorimeterHit.hh"
#include "GammaRayTelAnticoincidenceHit.hh"

#include "G4SystemOfUnits.hh"
#include "G4EventManager.hh"
#include "G4Event.hh"
#include "G4SDManager.hh"
#include "G4DigiManager.hh"
#include "G4ios.hh"

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GammaRayTelDigitizer::GammaRayTelDigitizer(G4String name)
  :G4VDigitizerModule(name)
{


  G4String colName = "DigitsCollection";
  collectionName.push_back(colName);
  Energy_Threshold = 120.*keV;
  TotalEnergy = 0.;
  ACDThreshold = 15*keV;

//create a messenger for this class
  digiMessenger = new GammaRayTelDigitizerMessenger(this);

}

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GammaRayTelDigitizer::~GammaRayTelDigitizer()
{
  delete digiMessenger;
}

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void GammaRayTelDigitizer::Digitize()
{
  DigitsCollection = new GammaRayTelDigitsCollection
    ("GammaRayTelDigitizer","DigitsCollection"); // to create the Digi Collection
  
  G4DigiManager* DigiMan = G4DigiManager::GetDMpointer();
  
  G4int THCID; // TrackerCollection
  G4int CHCID; // CalorimeterCollection
  G4int AHCID; // AnticoincidenceCollection

  TotalEnergy = 0.; // at each event
  
  // TKR Hits collection
  
  THCID = DigiMan->GetHitsCollectionID("TrackerCollection");  
  GammaRayTelTrackerHitsCollection* THC = 0; 
  THC = (GammaRayTelTrackerHitsCollection*)
    (DigiMan->GetHitsCollection(THCID));


  // CAL Hits collection

  CHCID = DigiMan->GetHitsCollectionID("CalorimeterCollection");
  GammaRayTelCalorimeterHitsCollection* CHC = 0;
  CHC = (GammaRayTelCalorimeterHitsCollection*)
         (DigiMan->GetHitsCollection(CHCID));

  // ACD Hits collection

  AHCID = DigiMan->GetHitsCollectionID("AnticoincidenceCollection");  
  GammaRayTelAnticoincidenceHitsCollection* AHC = 0;
  AHC = (GammaRayTelAnticoincidenceHitsCollection*)
         (DigiMan->GetHitsCollection(AHCID));

  
  if (THC)
    {
      G4int n_hit = THC->entries();

      for (G4int i=0;i<n_hit;i++)
    {
      G4double ESil = (*THC)[i]->GetEdepSil();
      G4int NStrip = (*THC)[i]->GetNStrip();
      G4int NPlane = (*THC)[i]->GetNSilPlane();
      G4int IsX = (*THC)[i]->GetPlaneType();
      
       // digi generation only if energy deposit greater than threshold

      if (ESil>Energy_Threshold)
        {
          GammaRayTelDigi* Digi = new GammaRayTelDigi();
          Digi->SetPlaneNumber(NPlane);
          Digi->SetPlaneType(IsX);
          Digi->SetStripNumber(NStrip);
          Digi->SetDigiType(0);
          Digi->SetEnergy(0.);
          DigitsCollection->insert(Digi);   
        }  
    }
    }
  if (CHC)
    {
      G4int n_hit = CHC->entries();
      
      for (G4int i=0;i<n_hit;i++)
    {
      TotalEnergy +=(*CHC)[i]->GetEdepCAL();
    }
      // digi generation only if energy deposit greater than 0.
      
      if (TotalEnergy>0.)
    {
      GammaRayTelDigi* Digi = new GammaRayTelDigi();
      Digi->SetPlaneNumber(0);
      Digi->SetPlaneType(0);
      Digi->SetStripNumber(0);
      Digi->SetDigiType(1);
      Digi->SetEnergy(TotalEnergy);
      DigitsCollection->insert(Digi);   
    }  

    }

  if (AHC)
    {
      G4int n_hit = AHC->entries();
      
      for (G4int i=0;i<n_hit;i++)
    {
      G4double energy = (*AHC)[i]->GetEdepACD();
      G4int type = (*AHC)[i]->GetACDTileNumber();
      
      // digi generation only if energy deposit greater than 0.
      
      if (energy>ACDThreshold)
        {
          GammaRayTelDigi* Digi = new GammaRayTelDigi();
          Digi->SetPlaneNumber(0);
          Digi->SetPlaneType(0);
          Digi->SetStripNumber(type);
          Digi->SetDigiType(2);
          Digi->SetEnergy(energy);
          DigitsCollection->insert(Digi);   
        }  
      
    }
    }
  
  if (THC||AHC||CHC){
    G4cout << "Number of digits in this event =  " 
       << DigitsCollection->entries()  
      // << " " << DigitsCollection->GetName()  
      // << " " << DigitsCollection->GetDMname() 
       << G4endl;
  }
  
  StoreDigiCollection(DigitsCollection);
  
  G4int DCID = -1;
  if(DCID<0)
    { 
      //      DigiMan->List();
      DCID = DigiMan->GetDigiCollectionID("GammaRayTelDigitizer/DigitsCollection");
    }
  
  
}



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