稳刀秤纹：大起大落全抹平，刀刀一个价

 fx-smoothcut

-- @file SmoothCut.lua
-- 稳刀秤纹 —— 大起大落全抹平，刀刀一个价

local SmoothCut = {}

local CONST = {
    CREST_LIFE    = 12.0,
    CREST_CD      = 4.0,
    ROLL_MIN      = 4,
    ROLL_MAX      = 20,
    WINDOW_N      = 3,

    COLOR_SMOOTH  = "#6088a0",
    COLOR_DEEP    = "#1e3448",
    COLOR_GHOST   = "#b0d0e8",

    ZORDER_SMOOTH = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1106000,
}

local _crestT    = 0
local _cdLeft    = 0
local _rolls     = {}
local _crestFx   = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "SMC",
        CONST.AUTOINC_BASE + _autoInc)
end

local function GetActorPos(id)
    if not id then return nil end
    local x = SL:GetValue("ACTOR_POSITION_X", id)
    local y = SL:GetValue("ACTOR_POSITION_Y", id)
    if not x or not y then return nil end
    return { x = x, y = y }
end

local function SafeRemove(node)
    if node and not GUI:Widget_IsNull(node) then
        GUI:removeFromParent(node)
    end
end

local function ShowTip(msg)
    if msg and msg ~= "" then SL:ShowSystemTips(msg) end
end

local function RollDice()
    return math.random(CONST.ROLL_MIN, CONST.ROLL_MAX)
end

function SmoothCut.Average()
    local sum, n = 0, 0
    for _, v in ipairs(_rolls) do
        sum = sum + v
        n = n + 1
    end
    if n == 0 then return 0 end
    return math.floor(sum / n)
end

-- 入秤与拉平：掷点进原料，落刀取均值
SL:RegisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "SMC_Flat", function()
    if _crestT <= 0 then return 0 end
    local roll = RollDice()
    table.insert(_rolls, roll)
    while #_rolls > CONST.WINDOW_N do
        table.remove(_rolls, 1)
    end
    SL:TipAbove(SL:GetValue("MARK_TARGET_ID"),
        "掷" .. roll)
    return SmoothCut.Average() - roll
end)

function SmoothCut.Cast()
    if _cdLeft > 0 or _crestT > 0 then return end
    local myID = SL:GetValue("USER_ID")
    _cdLeft = CONST.CREST_CD
    _crestT = CONST.CREST_LIFE
    _rolls = {}
    SafeRemove(_crestFx)
    _crestFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Scale"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_crestFx, CONST.ZORDER_SMOOTH)
    SL:PlayScaleUpFx(myID)
    ShowTip("秤上了——近三刀拉平，心电图拉成直线")
end

-- 定时器：纹成倒计时与秤环跟画
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _crestT > 0 then
            _crestT = _crestT - dt
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _crestFx and mp then
                GUI:setPosition(_crestFx, mp.x, mp.y - 62)
            end
            if _crestT <= 0 then
                SafeRemove(_crestFx)
                ShowTip("纹收了——刀又回到大起大落")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("稳刀", function()
        SmoothCut.Cast()
    end)
    ShowTip("技能已加载: 稳刀秤纹 (调试按钮触发)")
end, 1.0)

function SmoothCut.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "SMC_Flat")
    SafeRemove(_crestFx)
    _crestT = 0
    _rolls = {}
end

return SmoothCut