Separate IBodyOrientation from render traits.

OpenRA.Game/Traits/BodyOrientation.cs

@@ -0,0 +1,58 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 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.Graphics;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Traits
+{
+	public class BodyOrientationInfo : ITraitInfo, IBodyOrientationInfo
+	{
+		[Desc("Camera pitch for rotation calculations")]
+		public readonly WAngle CameraPitch = WAngle.FromDegrees(40);
+		public object Create(ActorInitializer init) { return new BodyOrientation(init.self, this); }
+	}
+
+	public class BodyOrientation : IBodyOrientation
+	{
+		[Sync] public int QuantizedFacings { get; set; }
+		BodyOrientationInfo Info;
+
+		public BodyOrientation(Actor self, BodyOrientationInfo info)
+		{
+			Info = info;
+		}
+
+		public WAngle CameraPitch { get { return Info.CameraPitch; } }
+
+		public WVec LocalToWorld(WVec vec)
+		{
+			// RA's 2d perspective doesn't correspond to an orthonormal 3D
+			// coordinate system, so fudge the y axis to make things look good
+			return new WVec(vec.Y, -Info.CameraPitch.Sin()*vec.X/1024, vec.Z);
+		}
+
+		public WRot QuantizeOrientation(Actor self, WRot orientation)
+		{
+			// Quantization disabled
+			if (QuantizedFacings == 0)
+				return orientation;
+
+			// Map yaw to the closest facing
+			var facing = Util.QuantizeFacing(orientation.Yaw.Angle / 4, QuantizedFacings) * (256 / QuantizedFacings);
+
+			// Roll and pitch are always zero if yaw is quantized
+			return new WRot(WAngle.Zero, WAngle.Zero, WAngle.FromFacing(facing));
+		}
+	}
+}