added AttackTurreted.

OpenRa.Game/Traits/AttackTurreted.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits
+{
+	class AttackTurreted : ITick
+	{
+		public Actor target;
+
+		// time (in frames) until each weapon can fire again.
+		int primaryFireDelay = 0;
+		int secondaryFireDelay = 0;
+
+		public AttackTurreted( Actor self )
+		{
+			self.traits.Get<Turreted>();
+		}
+
+		public void Tick( Actor self, Game game, int dt )
+		{
+			if( primaryFireDelay > 0 )
+				--primaryFireDelay;
+			if( secondaryFireDelay > 0 )
+				--secondaryFireDelay;
+
+			if( target == null )
+				return;
+
+			var mobile = self.traits.Get<Mobile>();
+			var turreted = self.traits.Get<Turreted>();
+			turreted.desiredFacing = mobile.GetFacing( target.Location - self.Location );
+			if( turreted.desiredFacing != turreted.turretFacing )
+				return;
+
+			if( self.unitInfo.Primary != null && CheckFire( self, game, self.unitInfo.Primary, ref primaryFireDelay ) )
+			{
+				secondaryFireDelay = Math.Max( 4, secondaryFireDelay );
+				return;
+			}
+			if( self.unitInfo.Secondary != null && CheckFire( self, game, self.unitInfo.Secondary, ref secondaryFireDelay ) )
+				return;
+		}
+
+		bool CheckFire( Actor self, Game game, string weaponName, ref int fireDelay )
+		{
+			if( fireDelay > 0 )
+				return false;
+			var weapon = Rules.WeaponInfo[ weaponName ];
+			var d = target.Location - self.Location;
+			if( weapon.Range * weapon.Range < d.X * d.X + d.Y * d.Y )
+				return false;
+
+			// FIXME: rules specifies ROF in 1/15 sec units; ticks are 1/25 sec
+			fireDelay = weapon.ROF;
+
+			game.world.Add( new Bullet( weaponName, self.Owner, self, self.CenterLocation.ToInt2(), target.CenterLocation.ToInt2(), game ) );
+			return true;
+		}
+	}
+}