圆月剑舞：转身一周剑光满圈

fx-circleslash

local CircleSlash = {}
local KEY = { SPIN_SPD = 3.2, ARC_LEN = 2.1 }

function Circle.Cast(self_)
    local spin = { a = 0 }
    SL:PlayActorAct(self_, "attack")
    SL:Schedule(function(dt)
        spin.a = spin.a + dt * KEY.SPIN_SPD * 6.28
        local total = SL:GetValue("spinRings") * 6.28
        -- 两道对称弧
        for half = 0, 1 do
            local a0 = spin.a + half * 3.1416
            SL:DrawArcFx("blade_arc", SL:GetValue("actorX", self_),
                         SL:GetValue("actorY", self_) - 46,
                         a0, a0 + KEY.ARC_LEN, 0.42)
        end
        -- 火花沿弧随机洒
        if math.random() < 0.5 then
            local ra = spin.a * 2
            SL:PlayBurst(SL:GetValue("actorX", self_) + math.cos(ra) * 74,
                         SL:GetValue("actorY", self_) - 46 + math.sin(ra) * 30,
                         "gold_spark", 1)
        end
        -- 扫中判定: 目标落在旋转半径覆盖区
        local target = SL:GetValue("curTarget")
        if target then
            local dx = SL:GetValue("actorX", target) - SL:GetValue("actorX", self_)
            if math.abs(dx) < 74 and not SL:GetValue("circleHitDone") then
                SL:SetValue("circleHitDone", true)
                SL:FreezeFrame(0.08)
                SL:PlayFxAt("impact_ring", SL:GetValue("actorX", self_),
                                           SL:GetValue("actorY", self_))
                SL:DeductHp(target, 26)
                SL:KnockBack(target, 42)
                SL:PlayActorAct(target, "stuck")
            end
        end
        if spin.a >= total then
            SL:UnSchedule("circleRun")
            SL:SetValue("circleHitDone", false)
            SL:PlayActorAct(self_, "idle")
        end
    end, 0.016, "circleRun")
end

return Circle