add range circle for gap generator

OpenRA.Mods.RA/RenderShroudCircle.cs

@@ -0,0 +1,45 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Drawing;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class RenderShroudCircleInfo : TraitInfo<RenderShroudCircle>, IPlaceBuildingDecoration
+	{
+		public void Render(WorldRenderer wr, World w, ActorInfo ai, int2 centerLocation)
+		{
+			wr.DrawRangeCircle(
+				Color.FromArgb(128, Color.Cyan),
+				centerLocation,
+				ai.Traits.Get<CreatesShroudInfo>().Range);
+
+			foreach (var a in w.ActorsWithTrait<RenderShroudCircle>())
+				if (a.Actor.Owner == a.Actor.World.LocalPlayer)
+					a.Trait.RenderBeforeWorld(wr, a.Actor);
+		}
+	}
+
+	class RenderShroudCircle : IPreRenderSelection
+	{
+		public void RenderBeforeWorld(WorldRenderer wr, Actor self)
+		{
+			if (self.Owner != self.World.LocalPlayer)
+				return;
+
+			wr.DrawRangeCircle(
+				Color.FromArgb(128, Color.Cyan),
+				self.CenterLocation, (int)self.Info.Traits.Get<CreatesShroudInfo>().Range);
+		}
+	}
+}
+