Add IBlocksProjectiles interface to avoid using BlocksProjectiles directly

OpenRA.Mods.Common/Traits/BlocksProjectiles.cs

@@ -9,9 +9,16 @@
 #endregion
 
 using System.Linq;
+using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
 {
+	[RequireExplicitImplementation]
+	public interface IBlocksProjectiles
+	{
+		WDist BlockingHeight { get; }
+	}
+
 	[Desc("This actor blocks bullets and missiles with 'Blockable' property.")]
 	public class BlocksProjectilesInfo : UpgradableTraitInfo
 	{
@@ -20,17 +27,20 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new BlocksProjectiles(init.Self, this); }
 	}
 
-	public class BlocksProjectiles : UpgradableTrait<BlocksProjectilesInfo>
+	public class BlocksProjectiles : UpgradableTrait<BlocksProjectilesInfo>, IBlocksProjectiles
 	{
 		public BlocksProjectiles(Actor self, BlocksProjectilesInfo info)
 			: base(info) { }
 
+		WDist IBlocksProjectiles.BlockingHeight { get { return Info.Height; } }
+
 		public static bool AnyBlockingActorAt(World world, WPos pos)
 		{
 			var dat = world.Map.DistanceAboveTerrain(pos);
+
 			return world.ActorMap.GetActorsAt(world.Map.CellContaining(pos))
-				.Any(a => a.TraitsImplementing<BlocksProjectiles>()
-					.Where(t => t.Info.Height.Length >= dat.Length)
+				.Any(a => a.TraitsImplementing<IBlocksProjectiles>()
+					.Where(t => t.BlockingHeight >= dat)
 					.Any(Exts.IsTraitEnabled));
 		}
 
@@ -41,7 +51,7 @@ namespace OpenRA.Mods.Common.Traits
 
 			foreach (var a in actors)
 			{
-				var blockers = a.TraitsImplementing<BlocksProjectiles>()
+				var blockers = a.TraitsImplementing<IBlocksProjectiles>()
 					.Where(Exts.IsTraitEnabled).ToList();
 
 				if (!blockers.Any())
@@ -49,7 +59,7 @@ namespace OpenRA.Mods.Common.Traits
 
 				var hitPos = WorldExtensions.MinimumPointLineProjection(start, end, a.CenterPosition);
 				var dat = world.Map.DistanceAboveTerrain(hitPos);
-				if ((hitPos - start).Length < length && blockers.Any(t => t.Info.Height.Length >= dat.Length))
+				if ((hitPos - start).Length < length && blockers.Any(t => t.BlockingHeight >= dat))
 				{
 					hit = hitPos;
 					return true;

OpenRA.Mods.Common/Traits/CombatDebugOverlay.cs

@@ -9,7 +9,9 @@
 #endregion
 
 using System;
+using System.Collections.Generic;
 using System.Drawing;
+using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Effects;
 using OpenRA.Traits;
@@ -22,19 +24,18 @@ namespace OpenRA.Mods.Common.Traits
 		public object Create(ActorInitializer init) { return new CombatDebugOverlay(init.Self); }
 	}
 
-	public class CombatDebugOverlay : IPostRender, INotifyDamage
+	public class CombatDebugOverlay : IPostRender, INotifyDamage, INotifyCreated
 	{
 		readonly DeveloperMode devMode;
 
 		readonly HealthInfo healthInfo;
-		readonly BlocksProjectilesInfo blockInfo;
+		IBlocksProjectiles[] allBlockers;
 		Lazy<AttackBase> attack;
 		Lazy<BodyOrientation> coords;
 
 		public CombatDebugOverlay(Actor self)
 		{
 			healthInfo = self.Info.TraitInfoOrDefault<HealthInfo>();
-			blockInfo = self.Info.TraitInfoOrDefault<BlocksProjectilesInfo>();
 			attack = Exts.Lazy(() => self.TraitOrDefault<AttackBase>());
 			coords = Exts.Lazy(() => self.Trait<BodyOrientation>());
 
@@ -42,6 +43,11 @@ namespace OpenRA.Mods.Common.Traits
 			devMode = localPlayer != null ? localPlayer.PlayerActor.Trait<DeveloperMode>() : null;
 		}
 
+		public void Created(Actor self)
+		{
+			allBlockers = self.TraitsImplementing<IBlocksProjectiles>().ToArray();
+		}
+
 		public void RenderAfterWorld(WorldRenderer wr, Actor self)
 		{
 			if (devMode == null || !devMode.ShowCombatGeometry)
@@ -53,10 +59,11 @@ namespace OpenRA.Mods.Common.Traits
 			if (healthInfo != null)
 				healthInfo.Shape.DrawCombatOverlay(wr, wcr, self);
 
-			if (blockInfo != null)
+			var blockers = allBlockers.Where(Exts.IsTraitEnabled).ToList();
+			if (blockers.Count > 0)
 			{
 				var hc = Color.Orange;
-				var height = new WVec(0, 0, blockInfo.Height.Length);
+				var height = new WVec(0, 0, blockers.Max(b => b.BlockingHeight.Length));
 				var ha = wr.ScreenPosition(self.CenterPosition);
 				var hb = wr.ScreenPosition(self.CenterPosition + height);
 				wcr.DrawLine(ha, hb, iz, hc);