+bool collision_object_map(const base_type& object);
+bool collision_object_map(const Rectangle& rect);
+
+/** Return a pointer to the tile at the given x/y coordinates */
+const Tile* gettile(float x, float y);
+
+// Some little helper function to check for tile properties
+bool issolid(float x, float y);
+bool isbrick(float x, float y);
+bool isice(float x, float y);
+bool isspike(float x, float y);
+bool isfullbox(float x, float y);