铁掌：一掌送它出去老远，撞墙更疼

 fx-knockaway

-- @file KnockAway.lua
-- 铁掌 —— 一掌送它出去老远，撞墙更疼

local KnockAway = {}

local CONST = {
    PUSH_DIST     = 120,
    PUSH_TIME     = 0.25,
    PUSH_DMG      = 6,
    WALL_BONUS    = 12,
    WALL_STUN     = 1.2,
    PALM_CD       = 4.0,

    COLOR_PALM    = "#d89050",
    COLOR_DEEP    = "#5e3210",
    COLOR_GHOST   = "#f8d0a8",

    ZORDER_PUSH   = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 999000,
}

local _cdLeft    = 0
local _pushT     = 0
local _pushFrom  = 0
local _pushTo    = 0
local _pushID    = 0
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "KNA",
        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 LandPalm()
    local hitWall = SL:ClampToBoundary(_pushID)
    SL:ActorHurt(_pushID, CONST.PUSH_DMG)
    if hitWall then
        SL:StunActor(_pushID, CONST.WALL_STUN)
        SL:ActorHurt(_pushID, CONST.WALL_BONUS)
        SL:PlayWallCrashFx(_pushID)
        SL:ScreenShake(3.4, 0.22)
        ShowTip("撞墙了——眩晕加一顿，趁现在下手")
    else
        ShowTip("推出去了——离你远了一百二十步")
    end
end

function KnockAway.Cast()
    if _cdLeft > 0 or _pushT > 0 then 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.PALM_CD
    _pushT = CONST.PUSH_TIME
    _pushID = tid
    _pushFrom = tp.x
    _pushTo = tp.x + (tp.x > mp.x and CONST.PUSH_DIST
        or -CONST.PUSH_DIST)
    SL:FreezeActorMove(tid, CONST.PUSH_TIME)
    SL:PlayPalmFx(myID)
    SL:TipAbove(tid, "推！")
    ShowTip("一掌送客——看它撞不撞墙")
end

-- 定时器：滑行插值与冷却推进
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _pushT > 0 then
            _pushT = _pushT - dt
            local k = 1 - math.max(0, _pushT) / CONST.PUSH_TIME
            local x = _pushFrom + (_pushTo - _pushFrom) * k
            SL:SetActorPos(_pushID, x)
            SL:DropTrailGhost(_pushID)
            if _pushT <= 0 then LandPalm() end
        end
    end, 0.02)
end

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

function KnockAway.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    if _pushT > 0 then
        SL:SetActorPos(_pushID, _pushTo)
        _pushT = 0
    end
end

return KnockAway