jecs-nightly/jecs/CHANGELOG.md

Changelog

Unreleased

0.6.0

Added

• World:range to restrict entity range to allow for e.g. reserving ids 1000..5000 for clients and everything above that (5000+) for entities from the server. This makes it possible to receive ids from a server that don't have to be mapped to local ids.
• jecs.component, jecs.tag and jecs.meta for preregistering ids and their metadata before a world
• Overload to World:entity to create an entity at the desired id.

Changed

• World:clear to remove the ID from every entity instead of the previous behaviour of removing all of the components on the entity. You should prefer deleting the entity instead for the previous behaviour.
• Entity ID layouts by putting the index in the lower bits, which should make every world function 1–5 nanoseconds faster.
• Hooks now pass the full component ID which is useful for pairs when you need both the relation and the target.
• Replaced OnSet with OnChange, which now only runs when the component ID was previously present on the entity.
• OnAdd now runs after the value has been set and also passes the component ID and the value.
• OnRemove now lazily looks up which archetype the entity will move to. This is meant to support interior structural changes within every hook.
• Optimized world:has for both single and multiple component presence. This comes at the cost that it cannot check the component presence for more than 4 components at a time. If this is important, consider calling this function multiple times.

Fixed

• World:delete not removing every pair with an unalive target. Specifically happened when you had at least two pairs of different relations with multiple targets each.

0.5.0

Added

• World:each to find entities with a specific Tag.
• World:children to find children of an entity.
• Query:cached to add a query cache that updates itself when an archetype matching the query gets created or deleted.

Changed

• Inference of entities' types using user-defined type functions.
• Pair<First, Second> to return Second if First is a Tag; otherwise, returns First.

Fixed

• World:target not giving adjacent pairs.

0.4.0

Added

• Recycling support to world:entity so reused entity IDs now increment generation.

Removed

• Query:drain
• Query:next
• Query:replace

Changed

• jecs.Pair type in Luau now returns the first element's type to avoid manual typecasting.

Fixed

• Query:archetypes now correctly takes self.

0.3.2 - 2024-10-01

Changed

• World:cleanup to traverse a header type for graph edges.

Fixed

• Regression when calling World:set after World:remove on the same component.
• Removed explicit error in JECS_DEBUG for World:target missing index.
• World.set type inference with NoInfer<T> in TypeScript.

0.3.1 - 2024-10-01

Added

• Index parameter to World:target.
• Global config _G.JECS_HI_COMPONENT_ID to change component ID limit (must be set before importing JECS).
• Debug mode via _G.JECS_DEBUG (must be set before importing JECS).
• world:cleanup to manually clean up empty archetypes.

Changed

• world:delete now also deletes dependent archetypes and child entities.

Fixed

• Query iterator to not drain by default.
• TypeScript package entry to src instead of src/init.
• Query.next now returns expected result tuple in typescript.
• pair returns a number instead of entity to prevent misuse.
• Exported built-in components ChildOf, Name, and world.parent.

0.2.10

Added

• Trait jecs.Tag for zero-cost tag components.
• Cleanup conditions: jecs.OnDelete, jecs.Remove.

Changed

• world:set is now idempotent when setting tags.

Fixed

• Improved performance for hooks.
• Exported types and functions: world:contains(), query:drain(), Query.
• Hook types: OnAdd, OnSet, OnRemove.
• ID flexibility for add, set, remove, get, has, query.
• world:contains() now returns boolean.
• world:has() parameters now correct.

0.2.2

Added

• query:replace(fn) for in-place replacement of component values.

Changed

• Iterator now goes backwards to avoid invalidation during iteration.

0.2.1

Added

• Built-in jecs.Component used to find all component IDs.

0.2.0

Added

• world:parent(entity) and jecs.ChildOf for parent-child relationships.

Changed

• Iteration performance improved by 20–40% through manual indexing.

0.1.1

Added

• world:clear(entity) for removing all components from an entity.
• TypeScript types.

0.1.0

Changed

• Optimized iterator.

0.1.0-rc.6

Added

• jecs.Wildcard term to query partially matched pairs.

0.1.0-rc.5

Added

• Entity relationships.
• world:__iter() for full world iteration.
• world:add(entity, component) (idempotent).

Fixed

• Component overriding when set out of order.

0.0.0-prototype.rc.3

Added

• Observers.
• query:without() for invariant queries.

Changed

• Separate ID ranges for entities and components.
• Avoid caching pointers; cache stable column indices instead.

Fixed

• Slow component updates due to unnecessary row changes.

0.0.0-prototype.rc.2 - 2024-04-26

Changed

• Query now uses smallest archetype map.
• Optimized query iterator.
• Renamed world:add to world:set.

0.0.0-prototype.rc.1

Added

• Initial release.