First commit

Subsurface/Items/Components/Signal/NotComponent.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Xml.Linq;
+
+namespace Subsurface.Items.Components
+{
+    class NotComponent : ItemComponent
+    {
+        public NotComponent(Item item, XElement element)
+            : base (item, element)
+        {
+        }
+        
+        public override void ReceiveSignal(string signal, Connection connection, Item sender)
+        {
+            if (connection.name != "signal_in") return;
+            
+            item.SendSignal(signal=="0" ? "1" : "0", "signal_out", item);
+        }
+    }
+}