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Assets/ithappy/Creative_Characters_FREE/Scripts/Editor/LayerMaskUtility.cs

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+using System;
+using UnityEditor;
+using UnityEngine;
+
+namespace CharacterCustomizationTool.Editor
+{
+    public class LayerMaskUtility
+    {
+        public static void CreateLayer(string name)
+        {
+            if (string.IsNullOrEmpty(name))
+            {
+                throw new ArgumentNullException(nameof(name), "New layer name string is either null or empty.");
+            }
+
+            var tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
+            var layerProps = tagManager.FindProperty("layers");
+            var propCount = layerProps.arraySize;
+
+            SerializedProperty firstEmptyProp = null;
+
+            for (var i = 0; i < propCount; i++)
+            {
+                var layerProp = layerProps.GetArrayElementAtIndex(i);
+                var stringValue = layerProp.stringValue;
+                if (stringValue == name)
+                {
+                    return;
+                }
+
+                if (i < 8 || stringValue != string.Empty)
+                {
+                    continue;
+                }
+
+                firstEmptyProp ??= layerProp;
+            }
+
+            if (firstEmptyProp == null)
+            {
+                Debug.LogError("Maximum limit of " + propCount + " layers exceeded. Layer \"" + name + "\" not created.");
+
+                return;
+            }
+
+            firstEmptyProp.stringValue = name;
+            tagManager.ApplyModifiedProperties();
+        }
+    }
+}