火药桶阵：一枪点着满地开花

SL:PlayFlyFx("spark_shot", gunX, gunY, barrelX, barrelY, 520, nil, OnHit)

fx-barrel

local BarrelTrap = {}
local KEY = { TOSS = 0.9 }

function BarrelTrap.Toss(self_, bx, by)
    SL:PlayActorAct(self_, "cast")
    local sx = SL:GetValue("actorX", self_) + 20
    local sy = SL:GetValue("actorY", self_) - 56
    SL:PlayFlyFx("powder_barrel", sx, sy, bx, by, KEY.TOSS,
                 { arc = 90, spin = 5 },
                 function()
                     SL:SetValue("barrelReady", true)
                     SL:PlayFxAt("wick_lit", bx, by - 26)
                     SL:PlayGroundFx("danger_ring", bx, by,
                                     SL:GetValue("blastRadius"))
                     BarrelTrap.Lure(bx)
                 end)
end

function BarrelTrap.Lure(bx)
    -- 引狼入圈: 目标走向桶位
    local target = SL:GetValue("curTarget")
    SL:MoveActorTo(target, bx + 70, SL:GetValue("actorY", target))
    -- 目标进圈后开火
    SL:Schedule(function(dt)
        local tx = SL:GetValue("actorX", target)
        if math.abs(tx - bx) < SL:GetValue("blastRadius") * 0.7 then
            SL:UnSchedule("lureWatch")
            local sx = SL:GetValue("actorX", SL:GetValue("selfActor")) + 22
            local sy = SL:GetValue("actorY", SL:GetValue("selfActor")) - 56
            SL:PlayFlyFx("spark_shot", sx, sy, bx, by, 520, nil, function()
                SL:PlayFxAt("barrel_boom", bx, by)
                SL:ScreenShake(0.4, 7)
                SL:FlashScreen("#ffd9a0", 0.2)
                SL:DeductHp(target, 45)
                SL:ShowHitNum(target, 45, "boom")
                SL:PlayActorAct(target, "stuck")
                SL:SetValue("barrelReady", false)
            end)
        end
    end, 0.016, "lureWatch")
end

return BarrelTrap