diff -r 9cb1a8fd9155 -r 4a72310c9cf5 tile.c
--- a/tile.c	Sat May 20 20:16:08 2006 +0000
+++ b/tile.c	Sat May 20 20:56:31 2006 +0000
@@ -68,3 +68,19 @@
 	GetTileSlope(tile, &h);
 	return h;
 }
+
+uint GetTileMaxZ(TileIndex t)
+{
+	uint max;
+	uint h;
+
+	h = TileHeight(t);
+	max = h;
+	h = TileHeight(t + TileDiffXY(1, 0));
+	if (h > max) max = h;
+	h = TileHeight(t + TileDiffXY(0, 1));
+	if (h > max) max = h;
+	h = TileHeight(t + TileDiffXY(1, 1));
+	if (h > max) max = h;
+	return max * 8;
+}