【玩法设计】经脉修炼：十八穴位的消耗曲线与战力成长设计

local function meridianCost(n)
    return 300 * math.pow(2, n - 1)
end

function openMeridian(actor, idx)
    local player = class(actor)
    local opened = tonumber(getplayvar(actor, 2, "MERIDIAN_N") or "0")
    if idx ~= opened + 1 then
        sendmsg(actor, 0, "请按顺序点亮第" .. (opened + 1) .. "个穴位")
        return
    end
    local cost = meridianCost(idx)
    local gas = tonumber(getplayvar(actor, 2, "ZHENQI") or "0")
    if gas < cost then
        sendmsg(actor, 0, "真气不足，还差" .. cost - gas .. "点")
        return
    end
    setplayvar(actor, "HUMAN", "ZHENQI", gas - cost, 1)
    setplayvar(actor, "HUMAN", "MERIDIAN_N", idx, 1)
    addbuff(actor, "MERIDIAN_UP", 86400)
    sendmsg(actor, 0, "第" .. idx .. "穴位已通，战力提升" .. idx * 50)
end