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https://github.com/Ukendio/jecs.git
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67 lines
1.4 KiB
Text
67 lines
1.4 KiB
Text
--!optimize 2
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--!native
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--!strict
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local ReplicatedStorage = game:GetService("ReplicatedStorage")
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local jecs = require(ReplicatedStorage.ecs)
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local __ = jecs.Wildcard
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local std = ReplicatedStorage.std
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local world = require(std.world)
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local Position = world:component() :: jecs.Entity<vector>
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local Previous = jecs.Rest
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local pre = jecs.pair(Position, Previous)
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local added = world
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:query(Position)
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:without(pre)
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:cached()
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local changed = world
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:query(Position, pre)
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:cached()
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local removed = world
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:query(pre)
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:without(Position)
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:cached()
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local children = {}
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for i = 1, 10 do
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local e = world:entity()
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world:set(e, Position, vector.create(i, i, i))
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table.insert(children, e)
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end
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local function flip()
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return math.random() > 0.5
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end
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local function system()
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for i, child in children do
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world:set(child, Position, vector.create(i,i,i))
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end
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for e, p in added:iter() do
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world:set(e, pre, p)
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end
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for i, child in children do
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if flip() then
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world:set(child, Position, vector.create(i + 1, i + 1, i + 1))
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end
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end
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for e, new, old in changed:iter() do
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if new ~= old then
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world:set(e, pre, new)
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end
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end
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for i, child in children do
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world:remove(child, Position)
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end
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for e in removed:iter() do
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world:remove(e, pre)
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end
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end
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local scheduler = require(std.scheduler)
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scheduler.SYSTEM(system)
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return 0
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