Method Process

avida-core/source/actions/PopulationActions.cc:5297–5357

  }
  
  void Process(cAvidaContext& ctx)
  {
    int src_cellid, dest_cellid;
    
    for (int d = 0; d < m_world->GetPopulation().GetNumDemes(); d++) {
      cDeme& deme = m_world->GetPopulation().GetDeme(d);
      int deme_size = deme.GetWidth() * deme.GetHeight();
      
      const cResourceCount &res = deme.GetDemeResourceCount();
      const int resid = res.GetResourceByName(m_res);
      
      if(resid == -1) {
        //Resource doesn't exist for this deme.  This is a bad situation, but just go to next deme.
        cerr << "Error: Resource \"" << m_res << "\" not defined for this deme" << endl;
        continue;
      }
      
      if(res.Get(ctx, resid) >= m_thresh) {
        //Set the resource to zero
        deme.AdjustResource(ctx, resid, (-1 * res.Get(ctx, resid)));
        
        //Pick a deme to move to
        int target_demeid = ctx.GetRandom().GetInt(0, m_world->GetConfig().NUM_DEMES.Get()-1);
        cDeme& target_deme = m_world->GetPopulation().GetDeme(target_demeid);
        int target_deme_size = target_deme.GetWidth() * target_deme.GetHeight();
        
        //Migrate up to m_numorgs orgs
        for(int i = 0; i < m_numorgs; i++) {
          src_cellid = -1;
          dest_cellid = -1;
          
          int counter = 0;
          do {
            src_cellid = ctx.GetRandom().GetInt(0, (deme.GetWidth() * deme.GetHeight())-1);
            counter++;
          } while((counter < deme_size) && (!deme.GetCell(src_cellid).IsOccupied()));
          
          counter = 0;
          do {
            dest_cellid = ctx.GetRandom().GetInt(0, target_deme_size - 1);
            counter++;
          } while((counter < target_deme_size) && (target_deme.GetCell(dest_cellid).IsOccupied())); 
          
          if( (src_cellid != -1) && (dest_cellid != -1) ) {
            
            m_world->GetPopulation().MoveOrganisms(ctx, src_cellid, dest_cellid, -1);
            
            deme.DecOrgCount();
            target_deme.IncOrgCount();
          }
          
          //migrate the organism from src_cell to dest cell
        }
        
        m_world->GetStats().IncNumMigrations();
        
      }