Actually add the file

OpenRa.Game/Traits/DemoTruck.cs

@@ -0,0 +1,59 @@
+using OpenRa.Game.Effects;
+using OpenRa.Game.Traits;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRa.Game.Orders;
+
+namespace OpenRa.Game.Traits
+{
+	class DemoTruck : IOrder, ISpeedModifier, INotifyDamage, IChronoshiftable
+	{
+		readonly Actor self;
+		public DemoTruck(Actor self)
+		{
+			this.self = self;
+		}
+		
+		// Fire primary on Chronoshift
+		public Order IssueOrder(Actor self, int2 xy, MouseInput mi, Actor underCursor)
+		{
+			return null; // Chronoshift order is issued through Chrome.
+		}
+		
+		public void ResolveOrder(Actor self, Order order)
+		{
+			if (order.OrderString == "ChronosphereSelect")
+				Game.controller.orderGenerator = new ChronoshiftDestinationOrderGenerator(self);
+			
+			var movement = self.traits.WithInterface<IMovement>().FirstOrDefault();
+			var chronosphere = Game.world.Actors.Where(a => a.Owner == order.Subject.Owner && a.traits.Contains<Chronosphere>()).FirstOrDefault();
+			if (order.OrderString == "Chronoshift" && movement.CanEnterCell(order.TargetLocation))
+				self.InflictDamage(chronosphere, self.Health, Rules.WarheadInfo["Super"]);
+		}
+		
+		// Fire primary on death
+		public void Damaged(Actor self, AttackInfo e)
+		{
+			if (e.DamageState == DamageState.Dead)
+				Detonate(self, e.Attacker);
+		}
+
+		public void Detonate(Actor self, Actor detonatedBy)
+		{
+			self.InflictDamage(detonatedBy, self.Health, Rules.WarheadInfo["Super"]);
+			var unit = self.traits.GetOrDefault<Unit>();
+			var altitude = unit != null ? unit.Altitude : 0;
+			int2 detonateLocation = self.CenterLocation.ToInt2();
+			
+			Game.world.AddFrameEndTask(
+				w => w.Add(new Bullet(self.Info.Primary, detonatedBy.Owner, detonatedBy,
+					detonateLocation, detonateLocation,	altitude, altitude)));
+		}
+
+		public float GetSpeedModifier()
+		{
+			// ARGH! You must not do this, it will desync!
+			return (Game.controller.orderGenerator is ChronoshiftDestinationOrderGenerator) ? 0f : 1f;
+		}
+	}
+}