Random map generator refactoring (#762)

random map generator refactoring and improvements

lib/rmg/Functions.h

@@ -0,0 +1,48 @@
+/*
+ * Functions.h, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+
+#pragma once
+
+#include "Zone.h"
+#include <boost/heap/priority_queue.hpp> //A*
+
+class RmgMap;
+class ObjectManager;
+class ObjectTemplate;
+class CMapGenerator;
+
+class rmgException : public std::exception
+{
+	std::string msg;
+public:
+	explicit rmgException(const std::string& _Message) : msg(_Message)
+	{
+	}
+	
+	virtual ~rmgException() throw ()
+	{
+	};
+	
+	const char *what() const throw () override
+	{
+		return msg.c_str();
+	}
+};
+
+rmg::Tileset collectDistantTiles(const Zone & zone, int distance);
+
+void createBorder(RmgMap & gen, Zone & zone);
+
+void paintZoneTerrain(const Zone & zone, CRandomGenerator & generator, RmgMap & map, const Terrain & terrainType);
+
+void initTerrainType(Zone & zone, CMapGenerator & gen);
+
+int chooseRandomAppearance(CRandomGenerator & generator, si32 ObjID, const Terrain & terrain);
+