【玩法策划】远征三选一：借鉴肉鸽游戏的随机增益层设计

local POOL = {
    { name = "攻击精进", buff = "ATK15", w = 50 },
    { name = "狂暴回复", buff = "HP_REGEN", w = 35 },
    { name = "寻宝直觉", buff = "DROP20", w = 15 },
}
local function rollThree()
    local picks, used = {}, {}
    while #picks < 3 do
        local total, acc = 0, 0
        for i, p in ipairs(POOL) do
            if used[i] ~= true then total = total + p.w end
        end
        local r, chosen = math.random(1, total), nil
        for i, p in ipairs(POOL) do
            if used[i] ~= true then
                acc = acc + p.w
                if r <= acc then chosen = i break end
            end
        end
        used[chosen] = true
        picks[#picks + 1] = POOL[chosen]
    end
    return picks
end

local function applyChoice(actor, pick)
    local player = class(actor)
    addbuff(actor, pick.buff, 1800)
    local seq = getplayvar(actor, 2, "EXPED_SEQ") or ""
    setplayvar(actor, "HUMAN", "EXPED_SEQ", seq .. pick.name .. ";", 1)
    sendmsg(actor, 0, "已选择增益：" .. pick.name .. "（持续30分钟）")
end