/// <summary>
/// Groups the specified component types.
/// </summary>
/// <param name="componentTypes">The component types.</param>
/// <returns></returns>
public EntityGroup Group(Type[] componentTypes)
{
if (_groups.TryGetValue(EntityGroup.GetHashCode(componentTypes), out EntityGroup entityGroup))
{
return(entityGroup);
}
entityGroup = new EntityGroup(componentTypes);
foreach (Entity entity in _entities.Values)
{
entityGroup.TryAdd(entity);
}
_groups.Add(EntityGroup.GetHashCode(componentTypes), entityGroup);
return(entityGroup);
}
/// <summary>
/// Initializes a new instance of the <see cref="LocalEntityManager"/> class.
/// </summary>
public LocalEntityManager()
{
All = new EntityGroup();
_groups.Add(All.GetHashCode(), All);
}
