Add a debug visualization for muzzle positions.

OpenRA.Mods.RA/DebugMuzzlePositions.cs

@@ -0,0 +1,62 @@
+#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;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using OpenRA.FileFormats;
+using OpenRA.GameRules;
+using OpenRA.Graphics;
+using OpenRA.Mods.RA.Render;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	public class DebugMuzzlePositionsInfo : ITraitInfo
+	{
+		public object Create(ActorInitializer init) { return new DebugFiringOffsets(init.self); }
+	}
+
+	public class DebugFiringOffsets : IPostRender
+	{
+		Lazy<IEnumerable<Armament>> armaments;
+
+		public DebugFiringOffsets(Actor self)
+		{
+			armaments = Lazy.New(() => self.TraitsImplementing<Armament>()
+				.Where(a => a.Info.OffsetModel == CoordinateModel.World));
+		}
+
+		public void RenderAfterWorld(WorldRenderer wr, Actor self)
+		{
+			if (self.World.LocalPlayer == null || !self.World.LocalPlayer.PlayerActor.Trait<DeveloperMode>().ShowMuzzles)
+				return;
+
+			var wlr = Game.Renderer.WorldLineRenderer;
+			var c = Color.White;
+
+			foreach (var a in armaments.Value)
+				foreach (var b in a.Barrels)
+				{
+					var muzzle = self.CenterPosition + a.MuzzleOffset(self, b);
+					var dirOffset = new WVec(0,-224,0).Rotate(a.MuzzleOrientation(self, b));
+
+					var sm = wr.ScreenPosition(muzzle);
+					var sd = wr.ScreenPosition(muzzle + dirOffset);
+					wlr.DrawLine(sm, sd, c, c);
+					wlr.DrawLine(sm + new float2(-1, -1), sm + new float2(-1, 1), c, c);
+					wlr.DrawLine(sm + new float2(-1, 1), sm + new float2(1, 1), c, c);
+					wlr.DrawLine(sm + new float2(1, 1), sm + new float2(1, -1), c, c);
+					wlr.DrawLine(sm + new float2(1, -1), sm + new float2(-1, -1), c, c);
+				}
+		}
+	}
+}