踏灵地纹：站在灵地里，刀重三成

 fx-groundamp

-- @file GroundAmp.lua
-- 踏灵纹 —— 站在灵地里，刀重三成

local GroundAmp = {}

local CONST = {
    SIGIL_LIFE    = 10.0,
    SIGIL_CD      = 2.0,
    SIGIL_RADIUS  = 55,
    AMP_HIT       = 16,
    BASE_HIT      = 12,

    COLOR_SIGIL   = "#68b878",
    COLOR_DEEP    = "#1e4828",
    COLOR_GHOST   = "#c0f0c8",

    ZORDER_SIGIL  = 90,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1108000,
}

local _sigilT    = 0
local _sigilX    = 0
local _cdLeft    = 0
local _sigilFx   = nil
local _scheduler = nil
local _autoInc   = 0

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

-- 入圈判定：每拍拿实时坐标和圆心算距离
function GroundAmp.InSigil()
    if _sigilT <= 0 then return false end
    local myID = SL:GetValue("USER_ID")
    local mp = GetActorPos(myID)
    if not mp then return false end
    return math.abs(mp.x - _sigilX) <= CONST.SIGIL_RADIUS
end

-- 加重结算：圈里的刀走加重档
SL:RegisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "GDA_Amp", function()
    if GroundAmp.InSigil() then
        return CONST.AMP_HIT - CONST.BASE_HIT
    end
    return 0
end)

function GroundAmp.Cast()
    if _cdLeft > 0 then return end
    local myID = SL:GetValue("USER_ID")
    local mp = GetActorPos(myID)
    if not mp then return end
    _cdLeft = CONST.SIGIL_CD
    _sigilT = CONST.SIGIL_LIFE
    _sigilX = mp.x
    SafeRemove(_sigilFx)
    _sigilFx = GUI:Layout_Create(GUI:Attach_Scene(),
        GenID("Sigil"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_sigilFx, CONST.ZORDER_SIGIL)
    SL:PlaySigilUpFx(mp.x)
    ShowTip("灵地画好了——站在圈里刀十六，出去了就十二")
end

-- 定时器：地契倒计时与灵地褪色
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _sigilT > 0 then
            _sigilT = _sigilT - dt
            if _sigilT <= 0 then
                SafeRemove(_sigilFx)
                ShowTip("灵地散了——地上什么都没留下")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("踏灵", function()
        GroundAmp.Cast()
    end)
    ShowTip("技能已加载: 踏灵纹 (调试按钮触发)")
end, 1.0)

function GroundAmp.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "GDA_Amp")
    SafeRemove(_sigilFx)
    _sigilT = 0
end

return GroundAmp