Height channel check

Cavern/Channels/ReferenceChannel.cs

@@ -1,6 +1,4 @@
-using System.Text;
-
-namespace Cavern.Channels {
+namespace Cavern.Channels {
     /// <summary>
     /// Possible channels in channel-based legacy systems.
     /// </summary>
@@ -41,23 +39,4 @@ public enum ReferenceChannel {
         TopRearCenter
 #pragma warning restore CS1591 // Missing XML comment for publicly visible type or member
     }
-
-    /// <summary>
-    /// Extension functions for reference channels.
-    /// </summary>
-    public static class ReferenceChannelExtensions {
-        /// <summary>
-        /// Get the first letters of each word in the channel's name, like TFL from Top Front Left.
-        /// </summary>
-        public static string GetShortName(this ReferenceChannel channel) {
-            StringBuilder result = new StringBuilder();
-            string source = channel.ToString();
-            for (int i = channel == ReferenceChannel.ScreenLFE ? 6 : 0; i < source.Length; i++) {
-                if ('A' <= source[i] && source[i] <= 'Z') {
-                    result.Append(source[i]);
-                }
-            }
-            return result.ToString();
-        }
-    }
 }

Cavern/Channels/ReferenceChannelExtensions.cs

@@ -0,0 +1,30 @@
+using System.Text;
+
+namespace Cavern.Channels {
+    /// <summary>
+    /// Extension functions for reference channels.
+    /// </summary>
+    public static class ReferenceChannelExtensions {
+        /// <summary>
+        /// Get the first letters of each word in the channel's name, like TFL from Top Front Left.
+        /// </summary>
+        public static string GetShortName(this ReferenceChannel channel) {
+            StringBuilder result = new StringBuilder();
+            string source = channel.ToString();
+            for (int i = channel == ReferenceChannel.ScreenLFE ? 6 : 0; i < source.Length; i++) {
+                if ('A' <= source[i] && source[i] <= 'Z') {
+                    result.Append(source[i]);
+                }
+            }
+            return result.ToString();
+        }
+
+        /// <summary>
+        /// Is the parameter a height <paramref name="channel"/>?
+        /// </summary>
+        public static bool IsHeight(this ReferenceChannel channel) =>
+            (channel >= ReferenceChannel.TopFrontLeft && channel <= ReferenceChannel.TopSideRight) ||
+            channel == ReferenceChannel.TopFrontCenter || channel == ReferenceChannel.GodsVoice ||
+            (channel >= ReferenceChannel.TopRearLeft && channel <= ReferenceChannel.TopRearCenter);
+    }
+}