/// <summary>
/// Creates empty entity with default transform Component
/// </summary>
/// <returns></returns>
public Entity CreateEntity()
{
if (IsDrawing)
{
throw new EcsWorkflowException("Cannot create entity during Draw phase");
}
Entity entity = new Entity(this);
if (_freeIds.Count != 0)
{
entity.Id = _freeIds.Dequeue();
}
else
{
entity.Id = ++_maxId;
}
Transform2DComponent transform = (Transform2DComponent)AddComponent(entity, typeof(Transform2DComponent));
entity.Transform = transform;
Tree.AddEntity(entity);
_entitiesForAdding.Enqueue(entity);
return(entity);
}
internal Component GetComponentInParent(Entity entity, Type componentType)
{
Transform2DComponent transform = entity.Transform;
while (transform != null)
{
var component = GetComponent(transform.Entity, componentType);
if (component != null)
{
return(component);
}
transform = transform.Parent;
}
return(null);
}
internal IEnumerable <Component> GetComponentsInParent(Entity entity, Type componentType)
{
Transform2DComponent transform = entity.Transform;
List <Component> result = new List <Component>();
while (transform != null)
{
var component = GetComponent(transform.Entity, componentType);
if (component != null)
{
result.Add(component);
}
transform = transform.Parent;
}
return(result);
}