血链连接：一条红线两个人命

fx-hplink

local HpLink = {}
local CONST = { KEY = "HpLink", TICK = 0.5, AMOUNT = 8 }

function HpLink.Cast(myID, targetID)
    HpLink._target = targetID
    HpLink._tickAcc = 0
    HpLink._sched = SL:Schedule(function(dt)
        HpLink:Update(dt)
    end, 0.02)
end

function HpLink:Update(dt)
    self._tickAcc = self._tickAcc + dt
    if self._tickAcc >= CONST.TICK then
        self._tickAcc = self._tickAcc - CONST.TICK
        local drained = math.min(CONST.AMOUNT,
            SL:GetValue("ACTOR_HP", self._target))
        if drained <= 0 then self:Break(); return end
        SL:SendLuaNetMsg(CONST.MSG_ID, self._target, drained, 0,
            SL:JsonEncode({ key = CONST.KEY, drain = drained }))
        SpawnDrainParticle(self._target)
    end
end

function HpLink:Break()
    SL:UnSchedule(self._sched)
    self._sched = nil
    ClearChainParticles()
end

return HpLink