internal int RegisterEntityFilter(Type requires, Type excludes, Type requiresOne, Action <Entity> OnAdded, Action <Entity> OnRemoved)
{
ComponentsFilter newOne = new ComponentsFilter()
{
RequiresAll = requires.GetGenericArguments(),
RequiresOne = excludes?.GetGenericArguments() ?? ComponentsFilter.EmptyTypes,
Excludes = requiresOne?.GetGenericArguments() ?? ComponentsFilter.EmptyTypes,
};
int filterID;
if (m_RegisteredFiltersList.IndexOf(newOne) > -1)
{
filterID = m_RegisteredFiltersList.IndexOf(newOne);
m_RegisteredFiltersCallbacks[filterID].OnAdded += OnAdded;
m_RegisteredFiltersCallbacks[filterID].OnRemoved += OnRemoved;
return(filterID);
}
m_RegisteredFiltersList.Add(newOne);
m_FilteredEntities.Add(new List <Entity>());
m_RegisteredFiltersCallbacks.Add(new Callbacks());
filterID = m_RegisteredFiltersList.Count - 1;
m_RegisteredFiltersCallbacks[filterID].OnAdded += OnAdded;
m_RegisteredFiltersCallbacks[filterID].OnRemoved += OnRemoved;
FilterCreatedEntities(filterID);
return(filterID);
}
internal bool DoesEntityPassFilter(Entity entity, int FilterId)
{
bool result = true;
ComponentsFilter Filter = m_RegisteredFiltersList[FilterId];
// Entity must have all of these components
foreach (Type componentType in Filter.RequiresAll)
{
if (!entity.HasComponent(componentType))
{
result = false;
break;
}
}
// Entity must have at least one of these components
if (Filter.RequiresOne.Length > 0)
{
bool hasOne = false;
foreach (Type componentType in Filter.RequiresOne)
{
if (entity.HasComponent(componentType))
{
hasOne = true;
break;
}
}
result &= hasOne;
}
// Entity must have none of these components
if (Filter.Excludes.Length > 0)
{
bool hasOne = false;
foreach (Type componentType in Filter.Excludes)
{
if (entity.HasComponent(componentType))
{
hasOne = true;
break;
}
}
result &= !hasOne;
}
return(result);
}
