4.4.0

Added

• Added WorldQuery.get_entities for returning query results as a set.

Fixed

• Removed an optimization which would check the equality of component values, since this would fail when comparing some types such as NumPy arrays.
• Removed unintentional iteration behavior from World. #8

4.3.1

Fixed

• Relation component lookup tables were replacing previous entries instead of adding to them.
• Relation ellipsis lookup tables were discarding entities which still had a relevant relation.

4.3.0

Added

• tcod.ecs.typing.ComponentKey is now stable.
• Can now register a callback to be called on component changes.

Fixed

• Fixed stale caches for relation component queries.

4.2.1

Fixed

• Unpickled worlds had reversed relations from what were saved.

4.2.0

Added

• Entity.relation_components now has MutableMapping functionality.
• You can now set the value of Entity.relation_components[component_key] = {target: component}.
• Added the Entity.clear method which effectively deletes an entity by removing its components/tags/relations.
  This does not delete relations targeting the cleared entity.

4.1.0

Added

• Now supports giving a query to another relation query, allowing conditional and chained relation queries. #1

4.0.0

Changed

• The type returned by World.Q has been renamed from tcod.ecs.Query to tcod.ecs.query.WorldQuery.
• Serialization format updated.

Performance

• Added a simple query cache.
  A query is automatically cached until any of the components/tags/relations it depends on have changed.