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Ensure entity exists

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Ukendio 2024-05-12 04:58:59 +02:00
parent 9fad8311c4
commit 2b0d55db83
2 changed files with 22 additions and 8 deletions
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22
lib/init.lua
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@ -302,20 +302,21 @@ local function nextEntityId(world: World, index: i24, name: string?)
entityIndex.dense[index] = id entityIndex.dense[index] = id
local entityLookup = world.entityLookup local entityLookup = world.entityLookup
if name then if name then
local entityLookupName = entityLookup.name
local entity = entityLookupName[name]
if entity then
return entity
end
entityLookup.id[id] = name entityLookup.id[id] = name
entityLookupName[name] = id entityLookup.name[name] = id
end end
return id return id
end end
function World.component(world: World, name: string?) function World.component(world: World, name: string?)
if name then
local entity = world.entityLookup.name[name]
if entity then
return entity
end
end
local componentId = world.nextComponentId + 1 local componentId = world.nextComponentId + 1
if componentId > HI_COMPONENT_ID then if componentId > HI_COMPONENT_ID then
-- IDs are partitioned into ranges because component IDs are not nominal, -- IDs are partitioned into ranges because component IDs are not nominal,
@ -327,6 +328,13 @@ function World.component(world: World, name: string?)
end end
function World.entity(world: World, name: string?) function World.entity(world: World, name: string?)
if name then
local entity = world.entityLookup.name[name]
if entity then
return entity
end
end
local entityId = world.nextEntityId + 1 local entityId = world.nextEntityId + 1
world.nextEntityId = entityId world.nextEntityId = entityId
return nextEntityId(world, entityId + REST, name) return nextEntityId(world, entityId + REST, name)

8
tests/world.lua
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@ -222,7 +222,13 @@ TEST("world", function()
CHECK(world:lookup("Eats") == Eats) CHECK(world:lookup("Eats") == Eats)
CHECK(world:name(Apples) == "Apples") CHECK(world:name(Apples) == "Apples")
end
do CASE "should return existing entity"
local world = jecs.World.new()
local Eats = world:entity("Eats")
CHECK(Eats == world:entity("Eats"))
end end
end) end)