119 lines
		
	
	
		
			4.0 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
			
		
		
	
	
			119 lines
		
	
	
		
			4.0 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
| ---@class ItemGenerator 物品生成器类
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| local ItemGenerator = {
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|     item_data = {},
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|     period = 100,
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|     item_distributions = {}
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| }
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| ItemGenerator.__index = ItemGenerator
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| 
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| ---数组洗牌函数(Fisher-Yates算法)
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| ---@param array any[] 需要打乱顺序的数组
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| local function ShuffleArray(array)
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|     for i = #array, 2, -1 do  -- 从后往前遍历
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|         local j = math.random(i)  -- 生成1到i的随机数
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|         array[i], array[j] = array[j], array[i]  -- 交换元素位置
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|     end
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| end
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| 
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| ---创建物品生成器实例
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| ---@param period number 生成周期次数
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| ---@param item_data table<number, number> 物品配置表 {物品ID = 总生成数量}
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| ---@return ItemGenerator 物品生成器实例
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| local function CreateItemGenerator(period, item_data)
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|     local self = setmetatable({}, ItemGenerator)
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|     ---@type number 存储生成周期
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|     self.period = period
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|     ---@type table<number, number> 原始配置数据
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|     self.item_data = item_data
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|     ---@type number 当前调用次数
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|     self.current_call = 0
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|     ---@type table<number, number[]> 物品分布数据结构
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|     self.item_distributions = {}
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|     self:InitializeDistributions()
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|     return self
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| end
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| 
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| ---初始化物品分布数据
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| function ItemGenerator:InitializeDistributions()
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|     -- 遍历所有物品配置
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|     for item_id, total in pairs(self.item_data) do
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|         -- 计算基础值和余数(保证总数 = 基础值*period + 余数)
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|         local base = math.floor(total / self.period)
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|         local remainder = total % self.period
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| 
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|         -- 创建初始分布数组(全部填充基础值)
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|         local distribution = {}
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|         for i = 1, self.period do
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|             distribution[i] = base
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|         end
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| 
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|         -- 生成索引数组并洗牌(用于随机分配余数)
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|         local indices = {}
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|         for i = 1, self.period do
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|             indices[i] = i
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|         end
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|         ShuffleArray(indices)  -- 打乱索引顺序
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| 
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|         -- 将余数随机分配到前remainder个位置
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|         for i = 1, remainder do
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|             distribution[indices[i]] = distribution[indices[i]] + 1
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|         end
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| 
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|         -- 存储当前物品的分布数组
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|         self.item_distributions[item_id] = distribution
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|     end
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| end
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| 
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| ---重置生成器状态(当调用次数超过N时触发)
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| function ItemGenerator:Reinitialize()
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|     self:InitializeDistributions()  -- 重新生成分布数据
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|     self.current_call = 0           -- 重置调用计数器
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| end
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| 
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| ---生成物品列表(每次调用产生一个周期的结果)
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| ---@return number[] 包含物品ID的数组(结果经过随机排序)
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| function ItemGenerator:Generate()
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|     -- 当超过周期次数时重置状态
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|     if self.current_call >= self.period then
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|         self:Reinitialize()
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|     end
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| 
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|     local current_step = self.current_call + 1  -- 获取当前步骤(1-based)
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|     local result = {}  -- 结果收集器
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| 
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|     -- 遍历所有物品的分布数据
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|     for item_id, distribution in pairs(self.item_distributions) do
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|         local count = distribution[current_step]  -- 获取当前步骤应生成数量
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|         for _ = 1, count do
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|             table.insert(result, item_id)  -- 按数量添加物品ID到结果集
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|         end
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|     end
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| 
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|     ShuffleArray(result)  -- 打乱结果顺序保证随机性
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|     self.current_call = self.current_call + 1  -- 增加调用计数器
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| 
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|     return result
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| end
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| 
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| ---获取当前未生成的物品剩余数量
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| ---@return table<number, number> 返回物品ID和剩余数量的映射表
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| function ItemGenerator:GetRemainingItems()
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|     local remaining = {}
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|     local current_step = self.current_call  -- 注意这里使用已调用次数(0-based)
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| 
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|     -- 遍历所有物品的分布数据
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|     for item_id, distribution in pairs(self.item_distributions) do
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|         local total_remaining = 0
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| 
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|         -- 计算从下一个步骤到周期结束的总数量
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|         for step = current_step + 1, self.period do
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|             total_remaining = total_remaining + distribution[step]
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|         end
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| 
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|         remaining[item_id] = total_remaining
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|     end
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| 
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|     return remaining
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| end
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| 
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| return CreateItemGenerator |