Added WithFacingSpriteBody trait.

Extracted AutoSelectionSize into its own trait.

RenderUnit -> RenderSprites + WithFacingSpriteBody upgrade rule

Remove RenderSimple dependencies of ThrowsParticle
and WithHarvestAnimation.

OpenRA.Mods.Common/Traits/Render/WithFacingSpriteBody.cs

@@ -0,0 +1,46 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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 OpenRA.Graphics;
+using OpenRA.Mods.Common.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	public class WithFacingSpriteBodyInfo : WithSpriteBodyInfo, Requires<IBodyOrientationInfo>, Requires<IFacingInfo>
+	{
+		public override object Create(ActorInitializer init) { return new WithFacingSpriteBody(init, this); }
+
+		public override IEnumerable<IActorPreview> RenderPreviewSprites(ActorPreviewInitializer init, RenderSpritesInfo rs, string image, int facings, PaletteReference p)
+		{
+			var ifacing = init.Actor.Traits.GetOrDefault<IFacingInfo>();
+			var facing = ifacing != null ? init.Contains<FacingInit>() ? init.Get<FacingInit, int>() : ifacing.GetInitialFacing() : 0;
+
+			var anim = new Animation(init.World, image, () => facing);
+			anim.PlayRepeating(RenderSprites.NormalizeSequence(anim, init.GetDamageState(), Sequence));
+
+			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
+		}
+
+		public override int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string race)
+		{
+			var rsi = ai.Traits.Get<RenderSpritesInfo>();
+			return sequenceProvider.GetSequence(rsi.GetImage(ai, sequenceProvider, race), Sequence).Facings;
+		}
+	}
+
+	public class WithFacingSpriteBody : WithSpriteBody
+	{
+		public WithFacingSpriteBody(ActorInitializer init, WithFacingSpriteBodyInfo info)
+			: base(init, info, RenderSprites.MakeFacingFunc(init.Self)) { }
+	}
+}