Merge pull request #9174 from reaperrr/radius-explode

Customizable impact victim scan radius

OpenRA.Mods.Common/Effects/Bullet.cs

@@ -166,8 +166,14 @@ namespace OpenRA.Mods.Common.Effects
 			if (info.ContrailLength > 0)
 				contrail.Update(pos);
 
-			if (ticks++ >= length || (info.Blockable && world.ActorMap
-				.GetUnitsAt(world.Map.CellContaining(pos)).Any(a => a.Info.HasTraitInfo<IBlocksProjectilesInfo>())))
+			var cell = world.Map.CellContaining(pos);
+			var height = world.Map.DistanceAboveTerrain(pos);
+
+			var shouldExplode = height.Length <= 0 // Hit the ground
+				|| ticks++ >= length // Flight length reached/exceeded
+				|| (info.Blockable && world.ActorMap.GetUnitsAt(cell).Any(a => a.Info.HasTraitInfo<IBlocksProjectilesInfo>())); // Hit a wall or other blocking obstacle
+
+			if (shouldExplode)
 				Explode(world);
 		}
 

OpenRA.Mods.Common/Lint/CheckTargetHealthRadius.cs

@@ -0,0 +1,55 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Mods.Common.Warheads;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Lint
+{
+	class CheckTargetHealthRadius : ILintRulesPass
+	{
+		public void Run(Action<string> emitError, Action<string> emitWarning, Ruleset rules)
+		{
+			foreach (var actorInfo in rules.Actors)
+			{
+				var healthTraits = actorInfo.Value.TraitInfos<HealthInfo>().ToList();
+				if (!healthTraits.Any())
+					continue;
+
+				var targetable = actorInfo.Value.TraitInfos<ITargetableInfo>().SelectMany(x => x.GetTargetTypes()).ToList();
+				if (!targetable.Any())
+					continue;
+
+				foreach (var weaponInfo in rules.Weapons)
+				{
+					var warheads = weaponInfo.Value.Warheads.OfType<SpreadDamageWarhead>().Where(dw => dw.Damage > 0);
+
+					foreach (var warhead in warheads)
+					{
+						// This is a special warhead, like the one on `weathering` in D2k.
+						if (!warhead.DamageTypes.Any())
+							continue;
+
+						// This warhead cannot affect this actor.
+						if (!warhead.ValidTargets.Overlaps(targetable))
+							continue;
+
+						if (healthTraits.Where(x => x.Radius.Length > warhead.TargetExtraSearchRadius.Length).Any())
+							emitError("Actor type `{0}` has a health radius exceeding the victim scan radius of a warhead on `{1}`!"
+								.F(actorInfo.Key, weaponInfo.Key));
+					}
+				}
+			}
+		}
+	}
+}

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -191,6 +191,7 @@
     <Compile Include="Lint\CheckDeathTypes.cs" />
     <Compile Include="Lint\CheckVoiceReferences.cs" />
     <Compile Include="Lint\CheckUpgrades.cs" />
+    <Compile Include="Lint\CheckTargetHealthRadius.cs" />
     <Compile Include="Lint\LintBuildablePrerequisites.cs" />
     <Compile Include="Lint\LintExts.cs" />
     <Compile Include="LoadScreens\ModChooserLoadScreen.cs" />

OpenRA.Mods.Common/Warheads/SpreadDamageWarhead.cs

@@ -19,6 +19,9 @@ namespace OpenRA.Mods.Common.Warheads
 		[Desc("Range between falloff steps.")]
 		public readonly WDist Spread = new WDist(43);
 
+		[Desc("Extra search radius beyond maximum spread. Required to ensure damage to actors with large health radius.")]
+		public readonly WDist TargetExtraSearchRadius = new WDist(2048);
+
 		[Desc("Damage percentage at each range step")]
 		public readonly int[] Falloff = { 100, 37, 14, 5, 2, 1, 0 };
 
@@ -46,7 +49,10 @@ namespace OpenRA.Mods.Common.Warheads
 				InitializeRange();
 
 			var world = firedBy.World;
-			var hitActors = world.FindActorsInCircle(pos, Range[Range.Length - 1]);
+
+			// This only finds actors where the center is within the search radius,
+			// so we need to search beyond the maximum spread to account for actors with large health radius
+			var hitActors = world.FindActorsInCircle(pos, Range[Range.Length - 1] + TargetExtraSearchRadius);
 
 			foreach (var victim in hitActors)
 			{