Lua随机选取表中元素&处理

mapmonsters{

	{
		mapid = 150404,
		monsters = {
		
			{monsterId = 100402, weight = 147},
			{monsterId = 100403, weight = 147},
			{monsterId = 100404, weight = 147},
			{monsterId = 100406, weight = 147},
			{monsterId = 100405, weight = 147},
			{monsterId = 100502, weight = 5},
			{monsterId = 100503, weight = 5},
			{monsterId = 100504, weight = 5},
			
		}
	},
}

math.randomseed(tostring(os.time()):reverse():sub(1, 6)) -- 随机种子


function offline_random_monster(x)
	totalWeight = 0
	tempRate = {}
	bingo = 0

	-- 处理权重
	for i=1, table.getn(mapmonsters) do
		if mapmonsters[i].mapid == x then	-- 找到了地图
			bingo = i;
			for j = 1, table.getn(mapmonsters[i].monsters) do
				totalWeight = totalWeight + mapmonsters[i].monsters[j].weight
				table.insert(tempRate, totalWeight)
			end
		end
	end


	keynum = math.random(totalWeight)	-- 保存找到的地图索引

	for k=1, table.getn(tempRate)-1 do
		if keynum <= tempRate[k] then
			return mapmonsters[bingo].monsters[k].monsterId
		elseif keynum > tempRate[k] and keynum <= tempRate[k+1] then
			return mapmonsters[bingo].monsters[k+1].monsterId
		end

	end
end

Lua随机选取表中元素&处理,布布扣,bubuko.com

原文：http://blog.csdn.net/lightupheaven/article/details/22940905