Add a basic set of voxel render traits.

OpenRA.Mods.RA/Render/WithVoxelTurret.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007-2013 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.Collections.Generic;
+using System.Linq;
+using OpenRA.FileFormats;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Render
+{
+	public class WithVoxelTurretInfo : ITraitInfo, Requires<RenderVoxelsInfo>
+	{
+		[Desc("Voxel sequence name to use")]
+		public readonly string Sequence = "turret";
+
+		[Desc("Turreted 'Turret' key to display")]
+		public readonly string Turret = "primary";
+
+		public object Create(ActorInitializer init) { return new WithVoxelTurret(init.self, this); }
+	}
+
+	public class WithVoxelTurret
+	{
+		Actor self;
+		Turreted turreted;
+		IBodyOrientation body;
+
+		public WithVoxelTurret(Actor self, WithVoxelTurretInfo info)
+		{
+			this.self = self;
+			body = self.Trait<IBodyOrientation>();
+			turreted = self.TraitsImplementing<Turreted>()
+				.First(tt => tt.Name == info.Turret);
+
+			var rv = self.Trait<RenderVoxels>();
+			rv.Add(new VoxelAnimation(VoxelProvider.GetVoxel(rv.Image, info.Sequence),
+			                          () => turreted.Position(self), () => TurretRotation(),
+			                          () => false, () => 0));
+		}
+
+		IEnumerable<WRot> TurretRotation()
+		{
+			var b = self.Orientation;
+			var qb = body.QuantizeOrientation(self, b);
+			yield return turreted.LocalOrientation(self) + WRot.FromYaw(b.Yaw - qb.Yaw);
+			yield return qb;
+		}
+	}
+}