Add DamagedWithoutFoundation trait for building weathering.

OpenRA.Mods.D2k/DamagedWithoutFoundation.cs

@@ -0,0 +1,75 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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.GameRules;
+using OpenRA.Mods.RA.Buildings;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Cnc
+{
+	class DamagedWithoutFoundationInfo : ITraitInfo, Requires<HealthInfo>
+	{
+		[WeaponReference]
+		public readonly string Weapon = "weathering";
+		public readonly string[] SafeTerrain = { "Concrete" };
+		public readonly int DamageThreshold = 50;
+
+		public object Create(ActorInitializer init) { return new DamagedWithoutFoundation(init.self, this); }
+	}
+
+	class DamagedWithoutFoundation : ITick, ISync, INotifyAddedToWorld
+	{
+		readonly DamagedWithoutFoundationInfo info;
+		readonly Health health;
+		readonly WeaponInfo weapon;
+
+		[Sync] int damageThreshold = 100;
+		[Sync] int damageTicks;
+
+		public DamagedWithoutFoundation(Actor self, DamagedWithoutFoundationInfo info)
+		{
+			this.info = info;
+			health = self.Trait<Health>();
+			weapon = Rules.Weapons[info.Weapon.ToLowerInvariant()];
+		}
+
+		public void AddedToWorld(Actor self)
+		{
+			var safeTiles = 0;
+			var totalTiles = 0;
+			foreach (var kv in self.OccupiesSpace.OccupiedCells())
+			{
+				totalTiles++;
+				if (info.SafeTerrain.Contains(self.World.GetTerrainType(kv.First)))
+					safeTiles++;
+			}
+
+			damageThreshold = (info.DamageThreshold * health.MaxHP + (100 - info.DamageThreshold) * safeTiles * health.MaxHP / totalTiles) / 100;
+
+			// Actors start with maximum damage applied
+			var delta = health.HP - damageThreshold;
+			if (delta > 0)
+				health.InflictDamage(self, self.World.WorldActor, delta, null, false);
+		}
+
+		public void Tick(Actor self)
+		{
+			if (health.HP <= damageThreshold || --damageTicks > 0)
+				return;
+
+			foreach (var w in weapon.Warheads)
+				health.InflictDamage(self, self.World.WorldActor, w.Damage, w, false);
+
+			damageTicks = weapon.ROF;
+		}
+	}
+}