抛砖：一块砖砸出个破绽，接住就是双倍

 fx-baitbrick

-- @file BaitBrick.lua
-- 抛砖 —— 一块砖砸出个破绽，接住就是双倍

local BaitBrick = {}

local CONST = {
    BRICK_SPEED   = 320,
    BRICK_ARC     = 60,
    BRICK_GRAV    = 160,
    GUARD_TIME    = 1.2,
    BRICK_CD      = 3.0,
    OPEN_AMP      = 2.0,

    COLOR_BRICK   = "#906848",
    COLOR_DEEP    = "#3e2a14",
    COLOR_GHOST   = "#e8d0b0",

    ZORDER_BRICK  = 134,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1038000,
}

local _bricks     = {}
local _guardT     = 0
local _guardID    = 0
local _cdLeft     = 0
local _scheduler  = nil
local _autoInc    = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "BTB",
        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 OpenGuard(tid)
    _guardT = CONST.GUARD_TIME
    _guardID = tid
    SL:FreezeActorAll(tid, CONST.GUARD_TIME)
    SL:PlayGuardPoseFx(tid)
    SL:TipAbove(tid, "格挡了！")
    ShowTip("它接招了——一秒二破绽，打点上加双倍")
end

-- 抛砖入口
function BaitBrick.Throw()
    if _cdLeft > 0 then
        ShowTip("砖在飞——" .. string.format("%.1f", _cdLeft) .. "秒")
        return
    end
    if _guardT > 0 then
        ShowTip("它正格挡——快打！")
        return
    end
    local tid = SL:GetValue("MARK_TARGET_ID")
    local tp = GetActorPos(tid)
    local myID = SL:GetValue("USER_ID")
    local mp = GetActorPos(myID)
    if not tid or not tp or not mp then return end
    _cdLeft = CONST.BRICK_CD
    SL:SpawnProjectile(myID, tp.x - mp.x, CONST.BRICK_ARC,
        CONST.BRICK_SPEED, CONST.BRICK_GRAV,
        function(hitX)
            if math.abs(hitX - tp.x) <= 26 then OpenGuard(tid) end
        end)
    SL:PlayBrickTossFx(myID)
    ShowTip("砖出去了——它一接招破绽就开")
end

-- 破绽出口：格挡期的刀翻倍
SL:RegisterLUAEvent(LUA_EVENT_BEFORE_HURT, "BTB_Amp", function(tid, dmg)
    if _guardT > 0 and tid == _guardID then
        return math.floor(dmg * CONST.OPEN_AMP)
    end
    return dmg
end)

-- 定时器：破绽倒计时
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _guardT > 0 then
            _guardT = _guardT - dt
            local mp = GetActorPos(_guardID)
            if _guardFx and mp then
                GUI:setPosition(_guardFx, mp.x, mp.y - 70)
            end
            if _guardT <= 0 then
                ShowTip("它放下手了——再抛一块")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("抛砖", function()
        BaitBrick.Throw()
    end)
    ShowTip("技能已加载: 抛砖 (调试按钮触发)")
end, 1.0)

function BaitBrick.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_BEFORE_HURT, "BTB_Amp")
    SafeRemove(_guardFx)
    _guardT = 0
end

return BaitBrick