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.Game/Graphics/TargetLineRenderable.cs

@@ -0,0 +1,77 @@
+#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.Collections.Generic;
+using System.Linq;
+using OpenRA.Primitives;
+
+namespace OpenRA.Graphics
+{
+	public class TargetLineRenderable : IRenderable, IFinalizedRenderable
+	{
+		readonly IEnumerable<WPos> waypoints;
+		readonly Color color;
+		readonly int width;
+		readonly int markerSize;
+
+		public TargetLineRenderable(IEnumerable<WPos> waypoints, Color color, int width, int markerSize)
+		{
+			this.waypoints = waypoints;
+			this.color = color;
+			this.width = width;
+			this.markerSize = markerSize;
+		}
+
+		public WPos Pos => waypoints.First();
+		public int ZOffset => 0;
+		public bool IsDecoration => true;
+
+		public IRenderable WithZOffset(int newOffset) { return this; }
+
+		public IRenderable OffsetBy(in WVec vec)
+		{
+			// Lambdas can't use 'in' variables, so capture a copy for later
+			var offset = vec;
+			return new TargetLineRenderable(waypoints.Select(w => w + offset), color, width, markerSize);
+		}
+
+		public IRenderable AsDecoration() { return this; }
+
+		public IFinalizedRenderable PrepareRender(WorldRenderer wr) { return this; }
+		public void Render(WorldRenderer wr)
+		{
+			if (!waypoints.Any())
+				return;
+
+			var first = wr.Viewport.WorldToViewPx(wr.Screen3DPosition(waypoints.First()));
+			var a = first;
+			foreach (var b in waypoints.Skip(1).Select(pos => wr.Viewport.WorldToViewPx(wr.Screen3DPosition(pos))))
+			{
+				Game.Renderer.RgbaColorRenderer.DrawLine(a, b, width, color);
+				DrawTargetMarker(color, b, markerSize);
+				a = b;
+			}
+
+			DrawTargetMarker(color, first);
+		}
+
+		public static void DrawTargetMarker(Color color, int2 screenPos, int size = 1)
+		{
+			var offset = new int2(size, size);
+			var tl = screenPos - offset;
+			var br = screenPos + offset;
+			Game.Renderer.RgbaColorRenderer.FillRect(tl, br, color);
+		}
+
+		public void RenderDebugGeometry(WorldRenderer wr) { }
+		public Rectangle ScreenBounds(WorldRenderer wr) { return Rectangle.Empty; }
+	}
+}