51 lines
1.4 KiB
C#
51 lines
1.4 KiB
C#
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// using System;
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using System.Collections.Generic;
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namespace EventCubeMelt.Utils
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{
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class UniqueRandom99
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{
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private readonly List<(int r, int c)> _pool = new List<(int, int)>();
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// private readonly Random _rng = new Random();
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private int _idx = 0;
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public UniqueRandom99(int[,] arr)
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{
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int m = arr.GetLength(0);
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int n = arr.GetLength(1);
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for (int i = 0; i < m; i++)
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for (int j = 0; j < n; j++)
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if (arr[i, j] == 99)
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_pool.Add((i, j));
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Shuffle(); // 初始随机化
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}
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/// <summary>
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/// 返回一个从未返回过的 99 坐标；若数组里本来就没有 99，则一直返回 (-1,-1)
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/// 所有 99 用完后自动洗牌进入下一轮。
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/// </summary>
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public (int r, int c) Next()
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{
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if (_pool.Count == 0) return (-1, -1);
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if (_idx == _pool.Count) // 本轮用完，重置并洗牌
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{
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// _idx = 0;
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// Shuffle();
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return (-1, -1);
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}
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return _pool[_idx++];
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}
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private void Shuffle()
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{
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for (int i = _pool.Count - 1; i > 0; i--)
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{
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var j = UnityEngine.Random.Range(0, i + 1);
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(_pool[i], _pool[j]) = (_pool[j], _pool[i]);
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}
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}
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}
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} |