Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/HitShapes/Circle.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using OpenRA.Graphics;
+using OpenRA.Mods.Common.Graphics;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Primitives;
+
+namespace OpenRA.Mods.Common.HitShapes
+{
+	public class CircleShape : IHitShape
+	{
+		public WDist OuterRadius => Radius;
+
+		[FieldLoader.Require]
+		public readonly WDist Radius = new(426);
+
+		[Desc("Defines the top offset relative to the actor's center.")]
+		public readonly int VerticalTopOffset = 0;
+
+		[Desc("Defines the bottom offset relative to the actor's center.")]
+		public readonly int VerticalBottomOffset = 0;
+
+		public CircleShape() { }
+
+		public CircleShape(WDist radius) { Radius = radius; }
+
+		public void Initialize()
+		{
+			if (VerticalTopOffset < VerticalBottomOffset)
+				throw new YamlException("VerticalTopOffset must be equal to or higher than VerticalBottomOffset.");
+		}
+
+		public WDist DistanceFromEdge(in WVec v)
+		{
+			return new WDist(Math.Max(0, v.Length - Radius.Length));
+		}
+
+		public WDist DistanceFromEdge(WPos pos, WPos origin, WRot orientation)
+		{
+			if (pos.Z > origin.Z + VerticalTopOffset)
+				return DistanceFromEdge(pos - (origin + new WVec(0, 0, VerticalTopOffset)));
+
+			if (pos.Z < origin.Z + VerticalBottomOffset)
+				return DistanceFromEdge(pos - (origin + new WVec(0, 0, VerticalBottomOffset)));
+
+			return DistanceFromEdge(pos - new WPos(origin.X, origin.Y, pos.Z));
+		}
+
+		IEnumerable<IRenderable> IHitShape.RenderDebugOverlay(HitShape hs, WorldRenderer wr, WPos origin, WRot orientation)
+		{
+			var shapeColor = hs.IsTraitDisabled ? Color.LightGray : Color.Yellow;
+			yield return new CircleAnnotationRenderable(origin + new WVec(0, 0, VerticalTopOffset), Radius, 1, shapeColor);
+			yield return new CircleAnnotationRenderable(origin + new WVec(0, 0, VerticalBottomOffset), Radius, 1, shapeColor);
+		}
+	}
+}