MRJ works; moved ProvidesRadar.IsActive update to Tick to avoid desync if any other actor code relies on it.

OpenRa.Game/Traits/ProvidesRadar.cs

@@ -1,20 +1,26 @@
-
+using System.Linq;
+
 namespace OpenRa.Traits
 {
 	class ProvidesRadarInfo : StatelessTraitInfo<ProvidesRadar> {}
 
-	class ProvidesRadar
+	class ProvidesRadar : ITick
 	{
-		public bool IsActive(Actor self)
+		public bool IsActive { get; private set; }
+
+		public void Tick(Actor self) { IsActive = UpdateActive(self); }
+
+		bool UpdateActive(Actor self)
 		{
-			// TODO: Check for nearby MRJ
-			
 			// Check if powered
 			var b = self.traits.Get<Building>();
-			if (b != null && b.Disabled)
-				return false;
-			
-			return true;
+			if (b != null && b.Disabled) return false;
+
+			var isJammed = self.World.Actors.Any(a => a.traits.Contains<JamsRadar>()
+				&& self.Owner != a.Owner
+				&& (self.Location - a.Location).Length < a.Info.Traits.Get<JamsRadarInfo>().Range);
+
+			return !isJammed;
 		}
 	}
 }