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Implement world:targets

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kurokuukyo 2026-04-20 16:17:17 -04:00
parent 19823453aa
commit 2c9f3dad34
1 changed files with 46 additions and 0 deletions
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46
src/jecs.luau
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@ -194,6 +194,7 @@ type world = {
entity: (self: world, id: i53?) -> i53,
component: (self: world) -> i53,
target: (self: world, id: i53, relation: i53, index: number?) -> i53?,
targets: (self: world, id: i53, relation: i53) -> () -> i53?,
delete: (self: world, id: i53) -> (),
add: (self: world, id: i53, component: i53) -> (),
set: (self: world, id: i53, component: i53, data: any) -> (),
@ -253,6 +254,13 @@ export type World = {
index: number?
) -> Entity<unknown>?,
-- Gets an iterator for all viable targets of a relationship
targets: <T>(
self: World,
id: Entity<T> | number,
relation: ecs_entity_t<Component>
) -> () -> Id,
--- Deletes an entity and all it's related components and relationships.
delete: <T>(self: World, id: Entity<T>) -> (),
@ -3302,6 +3310,43 @@ local function world_new(DEBUG: boolean?)
ECS_PAIR_SECOND(nth))
end
local function world_targets(world: world, entity: i53, relation: i53): () -> i53?
local record = entity_index_try_get_unsafe(entity)
if not record then
return NOOP :: () -> i53
end
local archetype = record.archetype
if not archetype then
return NOOP :: () -> i53
end
local r = ECS_PAIR(relation, EcsWildcard)
local idr = world.component_index[r]
if not idr then
return NOOP :: () -> i53
end
local archetype_id = archetype.id
local count = idr.counts[archetype_id]
if not count then
return NOOP :: () -> i53
end
local nth = 0
return function(): i53?
if nth == count then
return nil
end
local target = entity_index_get_alive(world.entity_index,
ECS_PAIR_SECOND(nth))
nth += 1
return target
end
end
local function world_parent(world: world, entity: i53): i53?
return world_target(world, entity, EcsChildOf, 0)
end
@ -3730,6 +3775,7 @@ local function world_new(DEBUG: boolean?)
world.get = world_get :: any
world.has = world_has :: any
world.target = world_target
world.targets = world_targets
world.parent = world_parent
world.contains = world_contains
world.exists = world_exists