影枪：一道暗影穿身过，线上全挨六十

 fx-shadowspear

-- @file ShadowSpear.lua
-- 影枪 —— 一道暗影穿身过，线上全挨

local ShadowSpear = {}

local CONST = {
    SPEAR_CD     = 4.0,
    SPEAR_DMG    = 60,
    SPEAR_RANGE  = 500,
    SPEAR_HEIGHT = 40,

    COLOR_SPEAR  = "#9a7ab8",
    COLOR_DEEP   = "#2a1a4a",
    COLOR_GHOST  = "#e0d8f8",

    ZORDER_FX    = 135,
    AUTOINC_BASE = 969000,
}

local _cdLeft    = 0
local _spearT    = 0
local _scheduler = nil
local _autoInc   = 0

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

-- 影枪入口
function ShadowSpear.Cast()
    if _cdLeft > 0 then return end
    _cdLeft = CONST.SPEAR_CD
    _spearT = 0.4
    local myID = SL:GetValue("USER_ID")
    local mp = GetActorPos(myID)
    if not mp then return end
    for _, id in ipairs(SL:GetAllActorsInView()) do
        if id ~= myID then
            local tp = GetActorPos(id)
            if tp and math.abs(tp.y - mp.y) <= CONST.SPEAR_HEIGHT
                and tp.x > mp.x then
                SL:ActorHurt(id, CONST.SPEAR_DMG)
                SL:TipAbove(id, "-" .. CONST.SPEAR_DMG)
            end
        end
    end
    ShowTip("影枪出去了——线上全挨")
end

if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _spearT > 0 then
            _spearT = _spearT - dt
        end
    end, 0.02)
end

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

return ShadowSpear