花蝶扇：一把扇子扇出三条火线

fx-fan

local FanBlades = {}
local KEY = { SPEED = 1.5 }

function FanBlades.Cast(self_, target)
    if SL:GetValue("fanFlying") then return end
    SL:SetValue("fanFlying", true)
    SL:PlayActorAct(self_, "cast")
    local spread = math.rad(SL:GetValue("fanSpread") or 30)
    local tx = SL:GetValue("actorX", target)
    local ty = SL:GetValue("actorY", target) - 58
    local sx = SL:GetValue("actorX", self_) + 20
    local sy = SL:GetValue("actorY", self_) - 56
    local dist = math.sqrt((tx - sx) ^ 2 + (ty - sy) ^ 2)
    local hitCount = 0
    for wing = -1, 1 do
        local ang = wing * spread / 2
        SL:PlayFlyFx("iron_fan", sx, sy,
                     sx + math.cos(ang) * dist,
                     sy + math.sin(ang) * dist,
                     KEY.SPEED, { spin = 14 },
                     function()
                         hitCount = hitCount + 1
                         SL:PlayBurst(tx + wing * 18, ty, "fire_petal", 8)
                         if hitCount == 3 then
                             SL:FreezeFrame(0.05)
                             SL:ScreenShake(0.18, 3)
                             SL:DeductHp(target, 22)
                             SL:ShowHitNum(target, 22, "fan")
                             SL:PlayActorAct(target, "stuck")
                             SL:ScheduleOnce(function()
                                 SL:SetValue("fanFlying", false)
                             end, 0.6)
                         end
                     end)
    end
end

return FanBlades