let harvester splatter resources when exploding

closes #2346

OpenRA.Game/GameRules/WeaponInfo.cs

@@ -24,6 +24,8 @@ namespace OpenRA.GameRules
 		public readonly Dictionary<string, float> Versus;
 		[Desc("Can this damage resource patches?")]
 		public readonly bool DestroyResources = false;
+		[Desc("Will this splatter resources and which?")]
+		public readonly string AddsResourceType = null;
 		[Desc("Explosion effect to use.")]
 		public readonly string Explosion = null;
 		[Desc("Palette to use for explosion effect.")]

OpenRA.Game/Traits/World/ResourceLayer.cs

@@ -153,6 +153,13 @@ namespace OpenRA.Traits
 			return true;
 		}
 
+		public bool CanSpawnResourceAt(ResourceType newResourceType, CPos cell)
+		{
+			var currentResourceType = GetResource(cell);
+			return currentResourceType == newResourceType
+				|| (currentResourceType == null && AllowResourceAt(newResourceType, cell));
+		}
+
 		CellContents CreateResourceCell(ResourceType t, CPos p)
 		{
 			world.Map.CustomTerrain[p.X, p.Y] = world.TileSet.GetTerrainIndex(t.Info.TerrainType);

OpenRA.Mods.RA/Combat.cs

@@ -18,7 +18,8 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
-	public static class Combat			/* some utility bits that are shared between various things */
+	// some utility bits that are shared between various things
+	public static class Combat
 	{
 		static string GetImpactSound(WarheadInfo warhead, bool isWater)
 		{
@@ -49,10 +50,10 @@ namespace OpenRA.Mods.RA
 			Sound.Play(GetImpactSound(warhead, isWater), pos);
 
 			var smudgeLayers = world.WorldActor.TraitsImplementing<SmudgeLayer>().ToDictionary(x => x.Info.Type);
+			var resLayer = warhead.DestroyResources || !string.IsNullOrEmpty(warhead.AddsResourceType) ? world.WorldActor.Trait<ResourceLayer>() : null;
 
 			if (warhead.Size[0] > 0)
 			{
-				var resLayer = world.WorldActor.Trait<ResourceLayer>();
 				var allCells = world.Map.FindTilesInCircle(targetTile, warhead.Size[0]).ToList();
 
 				// `smudgeCells` might want to just be an outer shell of the cells:
@@ -76,10 +77,29 @@ namespace OpenRA.Mods.RA
 				}
 
 				// Destroy all resources in range, not just the outer shell:
-				foreach (var cell in allCells)
-				{
-					if (warhead.DestroyResources)
+				if (warhead.DestroyResources)
+					foreach (var cell in allCells)
 						resLayer.Destroy(cell);
+
+				// Splatter resources:
+				if (!string.IsNullOrEmpty(warhead.AddsResourceType))
+				{
+					var resourceType = world.WorldActor.TraitsImplementing<ResourceType>()
+						.FirstOrDefault(t => t.Info.Name == warhead.AddsResourceType);
+
+					if (resourceType == null)
+						Log.Write("debug", "Warhead defines an invalid resource type '{0}'".F(warhead.AddsResourceType));
+					else
+					{
+						foreach (var cell in allCells)
+						{
+							if (!resLayer.CanSpawnResourceAt(resourceType, cell))
+								continue;
+
+							var splash = world.SharedRandom.Next(1, resourceType.Info.MaxDensity - resLayer.GetResourceDensity(cell));
+							resLayer.AddResource(resourceType, cell, splash);
+						}
+					}
 				}
 			}
 			else
@@ -202,6 +222,7 @@ namespace OpenRA.Mods.RA
 				var falloff = (float)GetDamageFalloff(distance * 1f / warhead.Spread.Range);
 				rawDamage = (float)(falloff * rawDamage);
 			}
+
 			return (float)(rawDamage * modifier * (float)warhead.EffectivenessAgainst(target.Info));
 		}
 	}

OpenRA.Mods.RA/SeedsResource.cs

@@ -63,16 +63,13 @@ namespace OpenRA.Mods.RA
 				.SkipWhile(p => resLayer.GetResource(p) == resourceType && resLayer.IsFull(p.X, p.Y))
 				.Cast<CPos?>().FirstOrDefault();
 
-			if (cell != null && self.World.Map.IsInMap(cell.Value) &&
-				(resLayer.GetResource(cell.Value) == resourceType
-				|| (resLayer.GetResource(cell.Value) == null && resLayer.AllowResourceAt(resourceType, cell.Value))))
+			if (cell != null && resLayer.CanSpawnResourceAt(resourceType, cell.Value))
 				resLayer.AddResource(resourceType, cell.Value, 1);
-
 		}
 
 		static IEnumerable<CPos> RandomWalk(CPos p, MersenneTwister r)
 		{
-			for (; ; )
+			for (;;)
 			{
 				var dx = r.Next(-1, 2);
 				var dy = r.Next(-1, 2);

mods/cnc/rules/vehicles.yaml

@@ -71,6 +71,8 @@ HARV:
 		HuskActor: HARV.Husk
 	-GainsExperience:
 	RenderHarvester:
+	Explodes:
+		Weapon: TiberiumExplosion
 
 APC:
 	Inherits: ^Tank

mods/cnc/weapons.yaml

@@ -877,6 +877,21 @@ Tiberium:
 		Damage: 2
 		PreventProne: yes
 
+TiberiumExplosion:
+	Warhead:
+		Damage: 10
+		Spread: 9
+		Size: 1,1
+		Versus:
+			None: 90%
+			Wood: 75%
+			Light: 60%
+			Heavy: 25%
+		Explosion: chemball
+		InfDeath: 3
+		ImpactSound: xplosml2.aud
+		AddsResourceType: Tiberium
+
 Heal:
 	ROF: 4
 	Warhead:

mods/d2k/rules/vehicles.yaml

@@ -77,7 +77,7 @@ HARVESTER:
 	RevealsShroud:
 		Range: 4c0
 	Explodes:
-		Weapon: UnitExplodeScale
+		Weapon: SpiceExplosion
 		EmptyWeapon: UnitExplodeScale
 	LeavesHusk:
 		HuskActor: Harvester.Husk

mods/d2k/weapons.yaml

@@ -649,3 +649,18 @@ Shrapnel:
 		Damage: 60
 		ImpactSound: EXPLLG5.WAV
 
+SpiceExplosion:
+	Warhead:
+		Damage: 10
+		Spread: 9
+		Size: 2,2
+		Versus:
+			None: 90%
+			Wood: 75%
+			Light: 60%
+			Heavy: 25%
+		Explosion: med_explosion
+		InfDeath: 3
+		ImpactSound: EXPLLG5.WAV
+		AddsResourceType: Spice
+

mods/ra/rules/vehicles.yaml

@@ -285,7 +285,7 @@ HARV:
 		FullHuskActor: HARV.FullHusk
 		FullnessThreshold: 50
 	Explodes:
-		Weapon: UnitExplodeSmall
+		Weapon: OreExplosion
 		EmptyWeapon: UnitExplodeSmall
 
 MCV:

mods/ra/weapons.yaml

@@ -1360,3 +1360,18 @@ MADTankDetonate:
 		ImpactSound: mineblo1.aud
 		SmudgeType: Crater
 
+OreExplosion:
+	Warhead:
+		Damage: 10
+		Spread: 9
+		Size: 1,1
+		Versus:
+			None: 90%
+			Wood: 75%
+			Light: 60%
+			Heavy: 25%
+		Explosion: med_explosion
+		InfDeath: 3
+		ImpactSound: kaboom25.aud
+		AddsResourceType: Ore
+