铁头功：一头撞上去，它晕你也晕，比你先醒就赢

 fx-headbutt

--------------------------------------------------------------------------------
-- @file        HeadButt.lua
-- @brief       铁头功 —— 一头撞上去，它晕你也晕，比你先醒就赢
--              客户端表现模块：配置表 / 对撞构件 / 双晕状态机 / 定时器
--------------------------------------------------------------------------------

local HeadButt = {}

--------------------------------------------------------------------------------
-- 配置与常量
--------------------------------------------------------------------------------
local CONST = {
    MY_STUN       = 1.2,        -- 我晕一点二
    FOE_STUN      = 2.5,        -- 它晕二点五
    HEAD_CD       = 9.0,        -- 铁头冷却九秒
    RUSH_LIFE     = 0.35,       -- 冲刺零点三五秒
    IMPACT_DMG    = 18,         -- 撞击十八
    FREE_DMG      = 18,         -- 白打窗口十八
    NORMAL_DMG    = 12,         -- 平时十二

    -- 颜色
    COLOR_IRON    = "#cfa96b",  -- 铁灰金
    COLOR_DEEP    = "#5a4020",  -- 深铁
    COLOR_GHOST   = "#f5ecd0",  -- 晕白

    ZORDER_GROUND = 118,
    ZORDER_STUN   = 131,
    ZORDER_EFFECT = 135,

    AUTOINC_BASE  = 960000,
}

--------------------------------------------------------------------------------
-- 模块内部状态
--------------------------------------------------------------------------------
local _myStun     = 0              -- 我晕余时
local _foeStun    = 0              -- 它晕余时
local _rushT      = 0              -- 冲刺余时
local _rushFrom   = 0
local _rushTo     = 0
local _cdLeft     = 0
local _scheduler  = nil
local _autoInc    = 0

local m_cos = math.cos
local m_sin = math.sin

--------------------------------------------------------------------------------
-- 辅助函数
--------------------------------------------------------------------------------
local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "HBT", CONST.AUTOINC_BASE + _autoInc)
end

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

---双晕构件：双方的晕圈同时亮
local function CreateStunRings(myX, foeX)
    local node = GUI:Layout_Create(GUI:Attach_SceneF(), GenID("Rings"),
        math.min(myX, foeX), 0, 0, 0, false)
    GUI:setLocalZOrder(node, CONST.ZORDER_STUN)
    for i = 1, 16 do
        local a1 = (i - 1) / 16 * 6.28
        local a2 = i / 16 * 6.28
        GUI:DrawLine_Create(node, string.format("m_%d", i), 0, 0, 2,
            m_cos(a1) * 22, m_sin(a1) * 9, m_cos(a2) * 22, m_sin(a2) * 9,
            CONST.COLOR_MAIN, 210)
    end
    return node
end

--------------------------------------------------------------------------------
-- 铁头入口：冲刺
--------------------------------------------------------------------------------
function HeadButt.Cast()
    if _cdLeft > 0 or _rushT > 0 then return end
    if _myStun > 0 then return end
    _cdLeft = CONST.HEAD_CD
    _rushT = CONST.RUSH_LIFE
    local mp = GetActorPos(SL:GetValue("USER_ID"))
    local tp = GetActorPos(SL:GetValue("MARK_TARGET_ID"))
    _rushFrom = mp and mp.x or 0
    _rushTo = tp and tp.x - 34 or _rushFrom
    ShowTip("撞了——双晕开局，你先醒两秒")
end

--------------------------------------------------------------------------------
-- 对撞结算
--------------------------------------------------------------------------------
local function Head_Impact()
    local mp = GetMyPos()
    local tp = GetActorPos(SL:GetValue("MARK_TARGET_ID"))
    if mp and tp then
        CreateStunRings(mp.x, tp.x)
    end
    _myStun = CONST.MY_STUN
    _foeStun = CONST.FOE_STUN
    SL:ActorHurt(SL:GetValue("MARK_TARGET_ID"), CONST.IMPACT_DMG)
    SL:TipAboveMe("晕" .. CONST.MY_STUN)
    SL:ScreenShake(4.8, 0.28)
end

--------------------------------------------------------------------------------
-- 定时器：冲刺、双晕与白打窗口
--------------------------------------------------------------------------------
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _rushT > 0 then
            _rushT = _rushT - dt
            local k = 1 - math.max(0, _rushT) / CONST.RUSH_LIFE
            SL:FlyActorTo(_rushFrom + (_rushTo - _rushFrom) * k)
            if _rushT <= 0 then
                Head_Impact()
            end
            return
        end
        if _myStun > 0 then
            _myStun = _myStun - dt
            if _myStun <= 0 then
                ShowTip("你醒了——它还晕着，白打窗口开")
            end
            return
        end
        _atkT = (_atkT or 1.4) - dt
        if _atkT <= 0 then
            _atkT = 1.4
            local tid = SL:GetValue("MARK_TARGET_ID")
            local free = _foeStun > 0
            local dmg = free and CONST.FREE_DMG or CONST.NORMAL_DMG
            SL:ActorHurt(tid, dmg)
            SL:TipAbove(tid, "-" .. dmg)
        end
    end, 0.02)
end

SL:RegisterLUAEvent(LUA_EVENT_SCENE_CLEAR, "HBT_Clear", function()
    _myStun, _foeStun, _rushT = 0, 0, 0
end)

SL:ScheduleOnce(function()
    ShowTip("技能已加载: 铁头功 (调试按钮触发)")
end, 1.0)

return HeadButt