lovexp/asteroids/actors.lua

local phys = require("phys")
local inspect = require("inspect")

local actors = {}

function actors.buildActors(game)
    local asteroids = {}
    local asteroids_mt = { __index = asteroids }

    function asteroids.new(asteroid)
        local stageIndex = asteroid.stage or #game.asteroids.stages
        local stage = game.asteroids.stages[stageIndex]
        local instance = {
            angle = math.random() * phys.tau,
            speed = stage.speed,
            facing = math.random() * phys.tau,
            spin = (math.random() - 0.5),
            radius = stage.radius,
            sprite = stage.sprite,
        }
        for k, v in pairs(asteroid) do
            instance[k] = v
        end
        instance.stage = stageIndex
        setmetatable(instance, asteroids_mt)
        return instance
    end

    return {
        asteroids = asteroids,
    }
end

return actors