同屏二十个火球：炸得多不如记得清

fx-sfx

local SfxLedger = {}
local CONST = { MAX_LIVE = 20, POOL_PER_KIND = 10 }

function SfxLedger.Play(kind, x, y, dir)
    -- 上限熔断: 满员时回收最老的一个
    if #SfxLedger._live >= CONST.MAX_LIVE then
        local oldest = table.remove(SfxLedger._live, 1)
        oldest:Stop()
        oldest:removeFromParent()
        SfxLedger:Return(oldest)
    end

    local node = SfxLedger:Borrow(kind)                 -- 池里借, 不新建
    node:setPosition(x, y)
    node:SetDirection(dir)
    node:SetEndCallback(function(ev)
        if ev == "end" then
            node:removeFromParent()
            SfxLedger:Return(node)
            SfxLedger:Erase(node)
        end
    end)
    node:Play()

    table.insert(SfxLedger._live, node)
    SL:SendLuaNetMsg(0, 0, 0, 0,
        SL:JsonEncode({ live = #SfxLedger._live }))     -- 账本上报, 调试面板可读
end

function SfxLedger:Erase(node)
    for i = 1, #SfxLedger._live do
        if SfxLedger._live[i] == node then
            table.remove(SfxLedger._live, i)
            return
        end
    end
end