斗气反震：打我一下自己掉一截

fx-reflect

local Reflect = {}
local KEY = { RATIO = 0.5, BACK_DELAY = 0.12 }
local active = false

function Reflect.Toggle()
    active = not active
    if active then
        -- 罩体金光：呼吸感靠定时器驱动
        SL:Schedule(function(dt)
            if not active then SL:UnSchedule("rfGlow") return end
            local a = 120 + math.floor(math.sin(os.clock() * 5) * 60)
            SL:SetActorAlpha(SL:GetValue("selfActor"), a + 100)
        end, 0.05, "rfGlow")
        SL:ShowSystemTips("斗气反震·开")
    else
        SL:ShowSystemTips("斗气反震·收")
    end
end

-- 引擎受击回调：被打了就走这里
function Reflect.OnBeHit(attacker, damage)
    if not active then return end
    local self_ = SL:GetValue("selfActor")
    local hx = SL:GetValue("actorX", self_) + 20
    local hy = SL:GetValue("actorY", self_) - 58
    -- 接触点火花
    SL:PlayBurst(hx, hy, "gold", 10)
    -- 0.12 秒后伤害弹回攻击方
    SL:ScheduleOnce(function()
        local back = math.floor(damage * KEY.RATIO)
        SL:DeductHp(attacker, back)
        SL:ShowHitNum(attacker, back, "gold_reflect")
        SL:PlayActorAct(attacker, "stuck")   -- 攻击方硬直半拍
        SL:PlayBurst(SL:GetValue("actorX", attacker),
                     SL:GetValue("actorY", attacker) - 58, "gold", 8)
    end, KEY.BACK_DELAY)
end

return Reflect