--nodedb.lua--database of all nodes that have 'save_in_nodedb' field set to true in node definition--serialization format:--(2byte z) (2byte y) (2byte x) (2byte contentid)--contentid := (14bit nodeid, 2bit param2)local functionint_to_bytes(i)local x=i+32768--clip to positive integerslocal cH = math.floor(x /256) %256;