See if this can help. I think it's mostly on a two plane but it might work.
http://blog.wolfire.com/2009/07/linear- ... rs-part-2/
local meta = minetest.get_meta(pos)
cmake . -DENABLE_GETTEXT=1 -DENABLE_FREETYPE=1 -DENABLE_LEVELDB=1 -DENABLE_REDIS=1 -DRUN_IN_PLACE=1 -DBUILD_SERVER=1