Everything is now OpenRA, not OpenRa

OpenRA.Game/Smudge.cs

@@ -0,0 +1,67 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using OpenRA.FileFormats;
+using OpenRA.GameRules;
+
+namespace OpenRA
+{
+	static class Smudge
+	{
+		const int firstScorch = 19;
+		const int firstCrater = 25;
+		const int framesPerCrater = 5;
+
+		public static void AddSmudge(this Map map, bool isCrater, int x, int y)
+		{
+			var smudge = map.MapTiles[x, y].smudge;
+			if (smudge == 0)
+				map.MapTiles[x, y].smudge = (byte) (isCrater
+					? (firstCrater + framesPerCrater * ChooseSmudge())
+					: (firstScorch + ChooseSmudge()));
+
+			if (smudge < firstCrater || !isCrater) return; /* bib or scorch; don't change */
+			
+			/* deepen the crater */
+			var amount = (smudge - firstCrater) % framesPerCrater;
+			if (amount < framesPerCrater - 1)
+				map.MapTiles[x, y].smudge++;
+		}
+
+		public static void AddSmudge(this Map map, int2 targetTile, WarheadInfo warhead)
+		{
+			switch (warhead.Explosion)		/* todo: push the scorch/crater behavior into data */
+			{
+				case 4:
+				case 5:
+					map.AddSmudge(true, targetTile.X, targetTile.Y);
+					break;
+
+				case 3:
+				case 6:
+					map.AddSmudge(false, targetTile.X, targetTile.Y);
+					break;
+			}
+		}
+
+		static int lastSmudge = 0;
+		static int ChooseSmudge() { lastSmudge = (lastSmudge + 1) % 6; return lastSmudge; }
+	}
+}