public override void Visit(Grass grass)
{
if (grass == null)
{
throw new ArgumentNullException("grass");
}
if (grass.IsAlive == false)
{
return;
}
GainWeight(1.00);
grass.Deactivate();
base.Visit(grass);
}
public override void Visit(Grass grass)
{
if (grass == null)
{
throw new ArgumentNullException("grass");
}
if (grass.IsAlive == false)
{
return;
}
GainWeight(1.00);
grass.Deactivate();
base.Visit(grass);
}
private IEnumerable <Action> Act(Animal animal)
{
if (animal.IsAlive == false)
{
yield break;
}
animal.GetOlder();
animal.LoseWeight(animal.Weight * 0.25);
// Dies from overpopulation or starvation?
int max = this.savannah.NumTiles;
int animals = this.savannah.Animals.Count(a => a.GetType() == animal.GetType());
double k = Random.NextDouble();
bool dies = k <((1.0 * animals) / (1.0 * max)) || animal.Age> Random.Next(5, 20);
if (dies)
{
yield return(animal.Deactivate);
yield break;
}
for (int dy = -1; dy <= 1; dy++)
{
for (int dx = -1; dx <= 1; dx++)
{
int x = animal.X + dx;
int y = animal.Y + dy;
Grass neighbourGrass = this.savannah.Grasses.SingleOrDefault(g => g.X == x && g.Y == y);
Animal neighbourAnimal = this.savannah.Animals.SingleOrDefault(a => a.IsAlive && a.X == x && a.Y == y);
if (neighbourGrass != null)
{
yield return(() => neighbourGrass.Accept(animal));
}
if (neighbourAnimal != null)
{
yield return(() => animal.Accept(neighbourAnimal));
}
}
}
}