#76 smudge

OpenRa.Game/Smudge.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game
+{
+	static class Smudge
+	{
+		const int firstScorch = 11;
+		const int firstCrater = 17;
+		const int framesPerCrater = 5;
+
+		public static void AddSmudge(bool isCrater, int x, int y)
+		{
+			var smudge = Rules.Map.MapTiles[x, y].smudge;
+			if (smudge == 0)
+				Rules.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)
+				Rules.Map.MapTiles[x, y].smudge++;
+		}
+
+		static int lastSmudge = 0;
+		static int ChooseSmudge() { lastSmudge = (lastSmudge + 1) % 6; return lastSmudge; }
+	}
+}