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/Graphics/LineAnnotationRenderable.cs

@@ -0,0 +1,61 @@
+#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 OpenRA.Graphics;
+using OpenRA.Primitives;
+
+namespace OpenRA.Mods.Common.Graphics
+{
+	public class LineAnnotationRenderable : IRenderable, IFinalizedRenderable
+	{
+		readonly WPos end;
+		readonly float width;
+		readonly Color startColor;
+		readonly Color endColor;
+
+		public LineAnnotationRenderable(WPos start, WPos end, float width, Color color)
+		{
+			Pos = start;
+			this.end = end;
+			this.width = width;
+			startColor = endColor = color;
+		}
+
+		public LineAnnotationRenderable(WPos start, WPos end, float width, Color startColor, Color endColor)
+		{
+			Pos = start;
+			this.end = end;
+			this.width = width;
+			this.startColor = startColor;
+			this.endColor = endColor;
+		}
+
+		public WPos Pos { get; }
+		public int ZOffset => 0;
+		public bool IsDecoration => true;
+
+		public IRenderable WithZOffset(int newOffset) { return new LineAnnotationRenderable(Pos, end, width, startColor, endColor); }
+		public IRenderable OffsetBy(in WVec vec) { return new LineAnnotationRenderable(Pos + vec, end + vec, width, startColor, endColor); }
+		public IRenderable AsDecoration() { return this; }
+
+		public IFinalizedRenderable PrepareRender(WorldRenderer wr) { return this; }
+		public void Render(WorldRenderer wr)
+		{
+			Game.Renderer.RgbaColorRenderer.DrawLine(
+				wr.Viewport.WorldToViewPx(wr.ScreenPosition(Pos)),
+				wr.Viewport.WorldToViewPx(wr.Screen3DPosition(end)),
+				width, startColor, endColor);
+		}
+
+		public void RenderDebugGeometry(WorldRenderer wr) { }
+		public Rectangle ScreenBounds(WorldRenderer wr) { return Rectangle.Empty; }
+	}
+}