【入门夯实】祖玛祭坛巡逻：守卫召唤的基础触发写法

local function onGuardSpawn()
    setontimerex(21, 30000)
end
local function ontimerex21()
    genmon(5, 30, 30, "祖玛卫士", 5, 1, 0)
end

local GUARD_CAP = 5
local padOn = false
local function ensurePadTimer()
    if padOn then
        return
    end
    padOn = true
    setontimerex(21, 30000)
end
local function ontimerex21()
    local alive = tonumber(getsysvar("ZumaGuardCount")) or 0
    if alive >= GUARD_CAP then
        return
    end
    local need = GUARD_CAP - alive
    genmon(5, 30, 30, "祖玛卫士", 5, need, 0)
    setsysvarex("ZumaGuardCount", GUARD_CAP, 1)
end

local function onGuardDie()
    local alive = tonumber(getsysvar("ZumaGuardCount")) or 0
    setsysvarex("ZumaGuardCount", math.max(alive - 1, 0), 1)
end

local function needSpawn(alive)
    return alive < 2 and 2 - alive or 0
end