【引擎触发】蜈蚣洞黑屏：黑暗区域的视野触发与火把照明

-- 黑暗区域：视野判定
local DARK = {x0 = 200, y0 = 200, x1 = 400, y1 = 400}
local function inDark(px, py)
    return px >= DARK.x0 and px <= DARK.x1 and py >= DARK.y0 and py <= DARK.y1
end
function onDarkZoneEnter(actor)
    local player = class(actor)
    local torch = getplayvar(player, "HUMAN", "TorchLit")
    local radius = torch == 1 and 5 or 2
    setplayvar(player, "HUMAN", "DarkRadius", radius, true)
    if radius == 2 then
        sendmsg(player, 1, 0, "四周一片漆黑，点上火把才能看得更远。")
    end
end

-- 火把与游走钳虫：消耗与刷新
local player = class(actor)
local function lightTorch(player)
    if not checkitemw(player, "火把", 1) then
        sendmsg(player, 1, 0, "背包里没有火把，杂货店有售。")
        return
    end
    takeitem(player, "火把", 1)
    setplayvar(player, "HUMAN", "TorchLit", 1, true)
    setplayvar(player, "HUMAN", "DarkRadius", 5, true)
    setontimer(player, 9851, 600, 600, 0)
    sendmsg(player, 1, 0, "火把点燃，视野扩大，可支撑 10 分钟。")
end
local function spawnCrawler()
    if math.random(1, 100) > 40 then return end
    local x = DARK.x0 + math.random(0, 200)
    local y = DARK.y0 + math.random(0, 200)
    genmon("womaCave", x, y, "游走钳虫", 6, 1, 0)
end