震地拍纹：地气一震，它的招乱了拍

 fx-quakepulse

-- @file QuakePulse.lua
-- 震地纹 —— 地气一震，它的招乱了拍

local QuakePulse = {}

local CONST = {
    CREST_LIFE    = 10.0,
    CREST_CD      = 4.0,
    PULSE_GAP     = 2.5,
    ZONE_RADIUS   = 75,
    PULSE_DMG     = 6,
    RESET_FLOOR   = 2.2,
    SAME_CD       = 5.0,

    COLOR_QUAKE   = "#a07850",
    COLOR_DEEP    = "#483018",
    COLOR_GHOST   = "#e8d0b0",

    ZORDER_QUAKE  = 90,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1110000,
}

local _crestT    = 0
local _cdLeft    = 0
local _pulseT    = 0
local _zoneX     = 0
local _sameCD    = 0
local _crestFx   = nil
local _scheduler = nil
local _autoInc   = 0

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

function QuakePulse.InZone()
    local tid = SL:GetValue("MARK_TARGET_ID")
    local tp = tid and GetActorPos(tid)
    if not tp then return false end
    return math.abs(tp.x - _zoneX) <= CONST.ZONE_RADIUS
end

-- 脉冲与断拍：圈内怪的出手计时重置
local function Pulse()
    SL:PlayPulseFx(_zoneX)
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid or not QuakePulse.InZone() then return end
    if _sameCD > 0 then return end
    _sameCD = CONST.SAME_CD
    SL:ResetAttackTimer(tid, CONST.RESET_FLOOR)
    SL:ActorHurt(tid, CONST.PULSE_DMG)
    SL:TipAbove(tid, "断拍-" .. CONST.PULSE_DMG)
end

function QuakePulse.Cast()
    if _cdLeft > 0 or _crestT > 0 then return end
    local myID = SL:GetValue("USER_ID")
    local tid = SL:GetValue("MARK_TARGET_ID")
    local mp = GetActorPos(myID)
    local tp = tid and GetActorPos(tid)
    if not mp or not tp then return end
    _cdLeft = CONST.CREST_CD
    _crestT = CONST.CREST_LIFE
    _pulseT = CONST.PULSE_GAP
    _sameCD = 0
    _zoneX = (mp.x + tp.x) / 2
    SafeRemove(_crestFx)
    _crestFx = GUI:Layout_Create(GUI:Attach_Scene(),
        GenID("Quake"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_crestFx, CONST.ZORDER_QUAKE)
    SL:PlayQuakeUpFx(_zoneX)
    ShowTip("地气通了——它在这片地上出手，两秒半断一拍")
end

-- 定时器：地脉倒计时与脉冲驱动
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        _sameCD = math.max(0, _sameCD - dt)
        if _crestT > 0 then
            _crestT = _crestT - dt
            _pulseT = _pulseT - dt
            if _pulseT <= 0 then
                _pulseT = CONST.PULSE_GAP
                Pulse()
            end
            if _crestT <= 0 then
                SafeRemove(_crestFx)
                ShowTip("地气散了——拍子归它自己了")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("震地", function()
        QuakePulse.Cast()
    end)
    ShowTip("技能已加载: 震地纹 (调试按钮触发)")
end, 1.0)

function QuakePulse.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_crestFx)
    _crestT = 0
    _sameCD = 0
end

return QuakePulse