cargo: added cargo-related sequences for APC/LST/TRAN; moved Passengers onto UnitInfo for convenience (and to allow garrisoning without a big hack); added Cargo trait to all known transports

OpenRa.Game/Traits/Cargo.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.GameRules;
+
+namespace OpenRa.Game.Traits
+{
+	class Cargo : IPips, IOrder
+	{
+		List<Actor> cargo = new List<Actor>();
+
+		public Cargo(Actor self) { }
+
+		public Order IssueOrder(Actor self, int2 xy, MouseInput mi, Actor underCursor)
+		{
+			// todo: check if there is an unoccupied `land` tile adjacent
+			if (mi.Button == MouseButton.Right && underCursor == self && cargo.Count > 0)
+				return new Order("Deploy", self, null, int2.Zero, null);
+
+			return null;
+		}
+
+		public void ResolveOrder(Actor self, Order order)
+		{
+			if (order.OrderString == "Deploy")
+			{
+				// todo: eject the units
+				self.CancelActivity();
+			}
+		}
+
+		public bool IsFull(Actor self)
+		{
+			return cargo.Count == self.Info.Passengers;
+		}
+
+		public IEnumerable<PipType> GetPips( Actor self )
+		{
+			for (var i = 0; i < self.Info.Passengers; i++)
+				if (i >= cargo.Count)
+					yield return PipType.Transparent;
+				else
+					yield return GetPipForPassenger(cargo[i]);
+		}
+
+		static PipType GetPipForPassenger(Actor a)
+		{
+			// probably not actually right yet; fix to match real-ra
+
+			if (a.traits.Contains<AutoHeal>())
+				return PipType.Yellow;
+			if (!a.traits.WithInterface<AttackBase>().Any())
+				return PipType.Yellow;	// noncombat [E6,SPY,THF]
+			if (a.traits.Contains<C4Demolition>())
+				return PipType.Red;		// E7
+
+			return PipType.Green;
+		}
+	}
+}