if (node.pathlib_node_edgeflags == pathlib_node_edgeflag_unknown)
node.pathlib_node_edgeflags = tile_check_plus2(node, node.origin);
if (node.pathlib_node_edgeflags == pathlib_node_edgeflag_unknown)
node.pathlib_node_edgeflags = tile_check_plus2(node, node.origin);