65 lines
1.7 KiB
C#
65 lines
1.7 KiB
C#
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using System.Collections.Generic;
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using UnityEngine;
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namespace Gameplay
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{
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public static class ArrayEx
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{
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public static List<T> RandomArrayFromArray<T>(List<T> list,
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int count)
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{
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if (list.Count < count)
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{
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throw new System.Exception("传入list长度不足");
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}
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var cloneList = new List<T>(list);
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var result = new List<T>();
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for (var i = 0; i < count; ++i)
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{
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var index = Random.Range(0, cloneList.Count);
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result.Add(cloneList[index]);
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cloneList.RemoveAt(index);
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}
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return result;
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}
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public static T RandomFromArray<T>(List<T> list)
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{
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var randomIndex = Random.Range(0, list.Count);
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return list[randomIndex];
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}
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public static T RandomFromArray<T>(T[] list)
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{
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var randomIndex = Random.Range(0, list.Length);
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return list[randomIndex];
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}
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public static T RandomWithWeights<T>(List<T> list,
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List<int> weights)
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{
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var totalWeight = 0;
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for (var i = 0; i < weights.Count; ++i)
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{
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totalWeight += weights[i];
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}
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var randomValue = Random.Range(0, totalWeight);
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var currentWeight = 0;
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for (var i = 0; i < weights.Count; ++i)
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{
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currentWeight += weights[i];
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if (randomValue < currentWeight)
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{
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return list[i];
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}
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}
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return list[^1];
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}
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}
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}
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