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diff --git a/engines/m4/rails.h b/engines/m4/rails.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef M4_RAILS_H
+#define M4_RAILS_H
+
+#include "m4/graphics.h"
+#include "common/list.h"
+#include "common/array.h"
+#include "common/rect.h"
+
+// TODO: This needs cleaning up
+
+namespace M4 {
+
+#define MAXRAILNODES 32
+#define PATH_END	 0xffff
+
+struct RailNode {
+	uint8 nodeID;
+	int32 x, y;
+	RailNode *shortPath;
+	int32 pathWeight;
+};
+
+struct NoWalkRect {
+	int32 x1, y1, x2, y2;
+	int32 alternateWalkToNode;
+	int32 walkAroundNode1;
+	int32 walkAroundNode2;
+	int32 walkAroundNode3;
+	int32 walkAroundNode4;
+};
+
+struct PathNode {
+	PathNode *next;
+	int8 nodeID;
+};
+
+struct IsWalkableData {
+	M4Surface *codes;
+	bool result;
+};
+
+class Rails {
+public:
+	Rails();
+	~Rails();
+
+	void setCodeSurface(M4Surface *surface) { _walkCodes = surface; }
+	void clearRails();
+	int32 addRailNode(int32 x, int32 y, bool restoreEdges);
+
+private:
+	Common::Array<RailNode *> _nodes;
+	Common::Array<int16 *> _edges;
+	Common::List<NoWalkRect *> _noWalkRects;
+	M4Surface *_walkCodes;
+
+	bool lineCrossesRect(int32 x1, int32 y1, int32 x2, int32 y2, Common::Rect rect);
+	bool linePassesThroughRect(int32 x1, int32 y1, int32 x2, int32 y2);
+	void createEdge(int32 node1, int32 node2);
+	bool removeRailNode(int32 nodeID, bool restoreEdges);
+	int16 getEdgeLength(int32 node1, int32 node2);
+
+	void restoreNodeEdges(int32 nodeID);
+	void restoreEdgeList();
+	void disposePath(RailNode *pathStart);
+	bool getShortestPath(int32 origID, int32 destID, RailNode **shortPath);
+	bool isLineWalkable(int x0, int y0, int x1, int y1);
+};
+
+} // End of namespace M4
+
+#endif