public void Should_behave_correctly_when_key_changed()
{
using World world = new World();
using EntitiesMap <int> map = world.GetEntities().AsMultiMap <int>();
Entity entity = world.CreateEntity();
entity.Set(42);
Check.That(map.TryGetEntities(42, out ReadOnlySpan <Entity> result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
entity.Set(1337);
Check.That(map.TryGetEntities(42, out result)).IsFalse();
Check.That(map.TryGetEntities(1337, out result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
entity.Get <int>() = 42;
entity.NotifyChanged <int>();
Check.That(map.TryGetEntities(1337, out result)).IsFalse();
Check.That(map.TryGetEntities(42, out result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
}
public void TryGetEntities_Should_return_weither_a_key_is_in_or_not()
{
using World world = new World();
using EntitiesMap <int> map = world.GetEntities().AsMultiMap <int>();
Entity entity = world.CreateEntity();
Check.That(map.TryGetEntities(42, out ReadOnlySpan <Entity> result)).IsFalse();
entity.Set(42);
Check.That(map.TryGetEntities(42, out result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
entity.Disable <int>();
Check.That(map.TryGetEntities(42, out result)).IsFalse();
entity.Enable <int>();
Check.That(map.TryGetEntities(42, out result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
entity.Remove <int>();
Check.That(map.TryGetEntities(42, out result)).IsFalse();
}
protected override void Update(float state, ReadOnlySpan <Entity> entities)
{
Components <CellId> gridIds = _world.GetComponents <CellId>();
Components <Behavior> behaviors = _world.GetComponents <Behavior>();
Components <Velocity> velocities = _world.GetComponents <Velocity>();
Components <DrawInfo> drawInfos = _world.GetComponents <DrawInfo>();
foreach (ref readonly Entity entity in entities)
{
Vector2 center = Vector2.Zero;
Vector2 direction = Vector2.Zero;
int count = 0;
if (_grid.TryGetEntities(gridIds[entity], out ReadOnlySpan <Entity> neighbors))
{
foreach (ref readonly Entity neighbor in neighbors)
{
center += drawInfos[neighbor].Position;
direction += velocities[neighbor].Value;
}
count = neighbors.Length;
}
behaviors[entity] = new Behavior(center, direction, count);
}
}
public void Complete_Should_empty_When_reative()
{
using World world = new World();
using EntitiesMap <int> map = world.GetEntities().WhenAddedEither <int>().AsMultiMap <int>();
Entity entity = world.CreateEntity();
entity.Set(42);
Check.That(map.TryGetEntities(42, out ReadOnlySpan <Entity> result)).IsTrue();
Check.That(result.ToArray()).ContainsExactly(entity);
map.Complete();
Check.That(map.TryGetEntities(42, out result)).IsFalse();
entity.Set(1337);
Check.That(map.TryGetEntities(42, out result)).IsFalse();
}