打更巡夜：梆子声是城的钟

 fx-watchman

local Watchman = {}
local ROUTE = { { 100, 200 }, { 330, 160 }, { 560, 200 }, { 330, 240 } }
local WATCH = { 3, 1, 4, 2, 5 }   -- 每个更点的敲击次数

local routeIdx, watchIdx = 1, 1

function WM.Tick(dt)
    -- 巡街: 走向当前路线节点
    local node = ROUTE[routeIdx]
    local dx = node[1] - SL:GetValue("actorX", "watchman")
    local dy = node[2] - SL:GetValue("actorY", "watchman")
    local d = math.sqrt(dx * dx + dy * dy)
    if d > 4 then
        SL:MoveActor("watchman", dx / d * 60 * dt, dy / d * 60 * dt)
        SL:PlayActorAct("watchman", "walk")
    else
        -- 到达更点: 敲梆
        routeIdx = routeIdx % #ROUTE + 1
        local knocks = WATCH[watchIdx] or 1
        watchIdx = watchIdx % #WATCH + 1
        for k = 1, knocks do
            SL:ScheduleOnce(function()
                SL:PlaySfx("bangzi")
                SL:PlayFxAt("bang_sound", SL:GetValue("actorX", "watchman"),
                                        SL:GetValue("actorY", "watchman"))
            end, k * 0.5)
        end
        SL:ShowSystemTips(knocks .. " 更天 — 天干物燥 小心火烛")
    end
end

return WM