1

Assets/ModuleTools/LoopIndexTool.cs

@@ -0,0 +1,21 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public static class LoopIndexTool {
+    /// <summary> 头尾循环标准化索引 </summary>
+    public static Data LoopIndex<Data>(this List<Data> list, int index) {
+        return list[LoopIndex(index, list.Count)];
+    }
+    /// <summary> 头尾循环标准化索引 </summary>
+    public static Data LoopIndex<Data>(this Data[] array, int index) {
+        return array[LoopIndex(index, array.Length)];
+    }
+    /// <summary> 头尾循环标准化索引 </summary>
+    public static int LoopIndex(int index, int maxIndex) {
+        if (maxIndex == 0) { Debug.LogError("错误索引：maxIndex = 0"); return 0; }
+        if (index < 0) { return LoopIndex(index + maxIndex, maxIndex); }
+        if (index >= maxIndex) { return LoopIndex(index - maxIndex, maxIndex); }
+        return index;
+    }
+}