/// <summary>
/// Updates the world
/// </summary>
/// <param name="fractionElapsed">A fraction of the simulation time</param>
public void Update(double fractionElapsed)
{
//All the fields grow
Parallel.ForEach <Field[]>(Fields, column => {
foreach (var field in column)
{
field.GrowCalories(fractionElapsed);
}
});
//Creatures update, if they split newborns are added and if they die, they are removed
creaturesToDie.Clear();
creaturesToBirth.Clear();
Parallel.ForEach <Creature.Creature>(Creatures, creature =>
{
var newBorn = creature.Update(fractionElapsed);
if (creature.ShouldDie())
{
lock (creaturesToDie)
{
creaturesToDie.Add(creature);
}
}
else if (newBorn != null)
{
lock (creaturesToBirth)
{
creaturesToBirth.Add(newBorn);
}
}
});
foreach (var deadCreature in creaturesToDie)
{
Creatures.Remove(deadCreature);
if (deadCreature == SelectedCreature)
{
SelectedCreature = null;
}
}
foreach (var newBorn in creaturesToBirth)
{
Creatures.AddFirst(newBorn);
}
//New creatures replace the dead ones
if (Creatures.Count < MinCreatures)
{
for (int i = 0; i < MinCreatures - Creatures.Count; i++)
{
AddCreature(new Creature.Creature(this));
}
}
//Old creatures over the max die
for (int i = 0; i < Creatures.Count - maxCreatures; i++)
{
if (Creatures.Last.Value == SelectedCreature)
{
SelectedCreature = null;
}
Creatures.RemoveLast();
}
}
/// <summary>
/// Registers a creature into the world
/// </summary>
/// <param name="creature">The creature</param>
public void AddCreature(Creature.Creature creature)
{
Creatures.AddFirst(creature);
}