internal EntityMap(
bool needClearing,
World world,
Predicate <ComponentEnum> filter,
List <Predicate <int> > predicates,
List <Func <EntityContainerWatcher, World, IDisposable> > subscriptions,
IEqualityComparer <TKey> comparer)
{
_needClearing = needClearing;
_worldId = world.WorldId;
_worldMaxCapacity = world.MaxCapacity;
_container = new EntityContainerWatcher(this, filter, predicates);
_subscriptions = Enumerable.Repeat(world.Subscribe <ComponentChangedMessage <TKey> >(OnChange), 1).Concat(subscriptions.Select(s => s(_container, world))).Merge();
_previousComponents = ComponentManager <TKey> .GetOrCreatePrevious(_worldId);
_components = ComponentManager <TKey> .GetOrCreate(_worldId);
_entities = new Dictionary <TKey, Entity>(comparer);
_entityIds = EmptyArray <bool> .Value;
if (!_needClearing)
{
IEntityContainer @this = this as IEntityContainer;
foreach (Entity entity in _components.GetEntities())
{
if (filter(entity.Components))
{
@this.Add(entity.EntityId);
}
}
}
}