回马枪：跑着跑着突然回头一枪

SL:SetActorDir(self_, SL:ReverseDir(SL:GetValue("actorDir", self_)))

fx-turnthrust

local TurnThrust = {}
local KEY = { TURN_LINE = 180, LUNGE = 0.16 }

local st = { phase = "idle", t = 0 }

local function SetPhase(name)
    st.phase = name
    st.t = 0
end

function TurnThrust.Feint(self_)
    SetPhase("retreat")
    SL:PlayActorAct(self_, "run")
    -- 撤退方向: 背对目标
    local tx = SL:GetValue("actorX", SL:GetValue("curTarget"))
    SL:SetActorDir(self_, tx > SL:GetValue("actorX", self_) and 6 or 2)
    SL:Schedule(function(dt)
        st.t = st.t + dt
        SL:SetActorVelocity(self_, SL:GetValue("actorDir", self_) == 2 and 95 or -95, 0)
        if math.random() < dt * 8 then
            SL:PlayFxAt("dust", SL:GetValue("actorX", self_),
                                  SL:GetValue("actorY", self_))
        end
        -- 退过回身线: 翻转朝向并进入贯刺
        if (SL:GetValue("actorDir", self_) == 2 and SL:GetValue("actorX", self_) <= KEY.TURN_LINE)
        or (SL:GetValue("actorDir", self_) == 6 and SL:GetValue("actorX", self_) >= KEY.TURN_LINE) then
            SL:UnSchedule("feintRun")
            SL:SetActorVelocity(self_, 0, 0)
            SL:SetActorDir(self_, SL:ReverseDir(SL:GetValue("actorDir", self_)))
            SetPhase("thrust")
            TurnThrust.Thrust(self_)
        end
    end, 0.016, "feintRun")
end

function TurnThrust.Thrust(self_)
    SL:ScheduleOnce(function()
        SL:PlayActorAct(self_, "attack")
        SL:PlayFlyFx("spear_line", SL:GetValue("actorX", self_),
                     SL:GetValue("actorY", self_) - 78, nil, nil, 0, nil)
        local target = SL:GetValue("curTarget")
        SL:DeductHp(target, 35)
        SL:ShowHitNum(target, 35, "thrust")
        SL:ScreenShake(0.22, 4)
        SL:PlayActorAct(target, "stuck")
        SL:KnockBack(target, 26)
        SetPhase("reset")
    end, KEY.LUNGE)
end

return TurnThrust