Add additional methods for layers.

Source/Engine/Core/Types/LayersMask.cs

@@ -39,6 +39,48 @@ namespace FlaxEngine
             return HasLayer(Level.GetLayerIndex(layerName));
         }
 
+        /// <summary>
+        /// Gets a layer mask based on a specific layer names.
+        /// </summary>
+        /// <param name="layerNames">The names of the layers (from layers settings).</param>
+        /// <returns>A layer mask with the mask set to the layers found. Returns a mask with 0 if not found. </returns>
+        public static LayersMask GetMask(params string[] layerNames)
+        {
+            LayersMask mask = new LayersMask();
+            foreach (var layerName in layerNames)
+            {
+                // Ignore blank entries
+                if (layerName.Length == 0)
+                    continue;
+                int index = Level.GetLayerIndex(layerName);
+                if (index != -1 && !mask.HasLayer(index))
+                {
+                    mask.Mask |= (uint)(1 << index);
+                }
+            }
+            return mask;
+        }
+        
+        /// <summary>
+        /// Gets the layer index based on the layer name.
+        /// </summary>
+        /// <param name="layerName">The name of the layer.</param>
+        /// <returns>The index if found, otherwise, returns -1.</returns>
+        public static int GetLayerIndex(string layerName)
+        {
+            return Level.GetLayerIndex(layerName);
+        }
+
+        /// <summary>
+        /// Gets the layer name based on the layer index.
+        /// </summary>
+        /// <param name="layerIndex">The index of the layer.</param>
+        /// <returns>The name of the layer if found, otherwise, a blank string.</returns>
+        public static string GetLayerName(int layerIndex)
+        {
+            return Level.GetLayerName(layerIndex);
+        }
+
         /// <summary>
         /// Adds two masks.
         /// </summary>

Source/Engine/Core/Types/LayersMask.h

@@ -27,12 +27,29 @@ public:
     {
     }
 
+    /// <summary>
+    /// Determines whether the specified layer index is set in the mask.
+    /// </summary>
+    /// <param name="layerIndex">Index of the layer (zero-based).</param>
+    /// <returns><c>true</c> if the specified layer is set; otherwise, <c>false</c>.</returns>
     FORCE_INLINE bool HasLayer(int32 layerIndex) const
     {
         return (Mask & (1 << layerIndex)) != 0;
     }
 
-    bool HasLayer(const StringView& layerName) const;
+    /// <summary>
+    /// Determines whether the specified layer name is set in the mask.
+    /// </summary>
+    /// <param name="layerName">Name of the layer (from layers settings).</param>
+    /// <returns><c>true</c> if the specified layer is set; otherwise, <c>false</c>.</returns>
+    bool HasLayer(const StringView& layerName);
+
+    /// <summary>
+    /// Gets a layers mask from a specific layer name.
+    /// </summary>
+    /// <param name="layerNames">The layer names.</param>
+    /// <returns>A layers mask with the Mask set to the same Mask as the layer name passed in. Returns a LayersMask with a mask of 0 if no layer found.</returns>
+    static LayersMask GetMask(StringView layerNames[]);
 
     operator uint32() const
     {