Adds damage debug overlay

OpenRA.Mods.RA/CombatDebugOverlay.cs

@@ -12,6 +12,7 @@ using System;
 using System.Drawing;
 using OpenRA.Graphics;
 using OpenRA.Traits;
+using OpenRA.Mods.RA.Effects;
 
 namespace OpenRA.Mods.RA
 {
@@ -20,7 +21,7 @@ namespace OpenRA.Mods.RA
 		public object Create(ActorInitializer init) { return new CombatDebugOverlay(init.self); }
 	}
 
-	public class CombatDebugOverlay : IPostRender
+	public class CombatDebugOverlay : IPostRender, INotifyDamage
 	{
 		Lazy<AttackBase> attack;
 		Lazy<IBodyOrientation> coords;
@@ -87,5 +88,19 @@ namespace OpenRA.Mods.RA
 				}
 			}
 		}
+
+		public void Damaged(Actor self, AttackInfo e)
+		{
+			if (devMode == null || !devMode.ShowCombatGeometry || e.Damage == 0)
+				return;
+
+			var health = self.TraitOrDefault<Health>();
+			if (health == null)
+				return;
+
+			var damageText = "{0} ({1}%)".F(-e.Damage, e.Damage * 100 / health.MaxHP);
+
+			self.World.AddFrameEndTask(w => w.Add(new FloatingText(self.CenterPosition, e.Attacker.Owner.Color.RGB, damageText, 30)));
+		}
 	}
 }