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Assets/ModuleTools/LayerMaskTool.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+/// <summary>
+/// 图层遮罩工具
+/// </summary>
+public static class LayerMaskTool {
+    ///// <summary> 板片 </summary>
+    //public static readonly LayerMask Plate = 1 << LayerMask.NameToLayer("Plate");
+    ///// <summary> 形状 </summary>
+    //public static readonly LayerMask Shape = 1 << LayerMask.NameToLayer("Shape");
+    ///// <summary> 安排点 </summary>
+    //public static readonly LayerMask Arrange = 1 << LayerMask.NameToLayer("Arrange");
+    ///// <summary> 模特 </summary>
+    //public static readonly LayerMask Model = 1 << LayerMask.NameToLayer("Model");
+}

Assets/ModuleTools/LayerMaskTool.cs.meta

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Assets/ModuleTools/LoopIndexTool.cs

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+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;
+    }
+}

Assets/ModuleTools/LoopIndexTool.cs.meta

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