Center.java

package sim.app.geo.haiti;



import sim.engine.SimState;
import sim.engine.Steppable;
import sim.field.grid.IntGrid2D;
import sim.util.Bag;



public class Center implements Steppable
{
    private static final long serialVersionUID = 1L;


    public static int ENERGY_FROM_FOOD = 1000;

    Location loc;


    public int foodLevel;


    int foodIncrement = 1;


    IntGrid2D gradient;


    public Center(int x, int y, int foodLevel)
    {
        loc = new Location(x, y);
        this.foodLevel = foodLevel;
    }


    public Center(int x, int y, int foodLevel, int energy)
    {
        loc = new Location(x, y);
        this.foodLevel = foodLevel;
        ENERGY_FROM_FOOD = energy;
    }


    @Override
    public void step(SimState state)
    {

        if (foodLevel <= 0)
        {
            return; // if there's no food, don't bother with anything else
        }
        HaitiFood world = (HaitiFood) state;

        Bag peopleInCenter = world.population.getObjectsAtLocation(loc.x, loc.y);
        if (peopleInCenter == null || peopleInCenter.size() == 0)
        {
            return;
        }

        // distribute food to people in center
        for (Object o : peopleInCenter)
        {
            Agent a = (Agent) o;

            if (!a.hasFood)
            { // give hungry agents food

                // give it the food
                a.hasFood = true;
                a.energyLevel += ENERGY_FROM_FOOD;

                // update Center's info about its own food reserves
                foodLevel -= foodIncrement;
                if (foodLevel <= 0)
                {
                    return; // have we run out of food?
                }
            }
        }
    }


    public int getFoodLevel()
    {
        return foodLevel;
    }


    public void setFoodLevel(int fl)
    {
        foodLevel = fl;
    }


}