一化三清：大火球裂变的小心思

fx-multifire

local MultiFire = {}
local CONST = { MSG_ID = 12110, KEY = "MultiFire", SPLIT_T = 0.55, ANG = 40 }

function MultiFire.Cast(myID, targetID)
    MultiFire._big = CreateBigFire(myX + 26, myY - 64)
    MultiFire._tid = targetID
    PerformWithDelayGlobal(function()
        MultiFire.Split()
    end, CONST.SPLIT_T * 1000)
end

function MultiFire:Split()
    local big = self._big
    local ang = CONST.ANG * math.pi / 180
    for i = -1, 1 do
        local a = i * ang / 2
        local child = CreateFireOrb(big.x, big.y)
        child:SetVelocity(math.cos(a) * 300, math.sin(a) * 300)
        child:SetHoming(self._tid, 4.0)              -- 追踪转向力 4/s
        child:OnArrive(function()
            SpawnSmallBoom(child:GetPos())
            self._target:OnHit(30)
        end)
    end
    big:Remove()
    SpawnSplitFlash(big.x, big.y)                    -- 分裂点的爆闪
end

return MultiFire