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.Cnc/Traits/PaletteEffects/LightPaletteRotator.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.Collections.Frozen;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Cnc.Traits
+{
+	[TraitLocation(SystemActors.World | SystemActors.EditorWorld)]
+	[Desc("Palette effect used for blinking \"animations\" on actors.")]
+	sealed class LightPaletteRotatorInfo : TraitInfo
+	{
+		[Desc("Palettes this effect should not apply to.")]
+		public readonly FrozenSet<string> ExcludePalettes = FrozenSet<string>.Empty;
+
+		[Desc("'Speed' at which the effect cycles through palette indices.")]
+		public readonly float TimeStep = .5f;
+
+		[Desc("Palette index to map to rotating color indices.")]
+		public readonly int ModifyIndex = 103;
+
+		[Desc("Palette indices to rotate through.")]
+		public readonly ImmutableArray<int> RotationIndices = [230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 238, 237, 236, 235, 234, 233, 232, 231];
+
+		public override object Create(ActorInitializer init) { return new LightPaletteRotator(this); }
+	}
+
+	sealed class LightPaletteRotator : ITick, IPaletteModifier
+	{
+		readonly LightPaletteRotatorInfo info;
+		float t = 0;
+
+		public LightPaletteRotator(LightPaletteRotatorInfo info)
+		{
+			this.info = info;
+		}
+
+		void ITick.Tick(Actor self)
+		{
+			t += info.TimeStep;
+		}
+
+		void IPaletteModifier.AdjustPalette(IReadOnlyDictionary<string, MutablePalette> palettes)
+		{
+			foreach (var pal in palettes)
+			{
+				if (info.ExcludePalettes.Contains(pal.Key))
+					continue;
+
+				var rotate = (int)t % info.RotationIndices.Length;
+				pal.Value.SetColor(info.ModifyIndex, pal.Value.GetColor(info.RotationIndices[rotate]));
+			}
+		}
+	}
+}