To build this tool you have to install openvdb and all of its dependencies. If you are on Mac we recommend using:

brew install openvdb

If you are on Linux we recommend you use:

sudo apt install libopenvdb-dev

Unfortunatly I (zack) do not use Windows machines so please refer to openvdb.org for how to set everything up for Windows.

These commands should also install the dependencies needed for this tool, however, we have to manually set the paths to the include folders before building the project. To do so, open CMakeLists.txt and look for the lines setting OPENVDB_INCLUDE_DIR, BOOST_INCLUDE_DIR, and TBB_INCLUDE_DIR. The paths which are currently there will not work for your machine so you will have to replace them. To find where they are located you should first update the locate database on your computer using the following command:

On Mac:

sudo /usr/libexec/locate.updatedb

On Linux:

sudo updatedb

Now you can find the paths for the three libraries above using

locate /tbb/
locate /openvdb/
locate /boost/

You will get many results, mostly of the form:

prefix/{name}/{version}/postfix

where {name} is either tbb, openvdb, or boost, and the version number will be dependent on what you have installed. You should overwrite what is in CMakeLists.txt with:

set(OPENVDB_INCLUDE_DIR
   prefix/openvdb/{version}/include)

set(BOOST_INCLUDE_DIR
   prefix/boost/{version}/include)

set(TBB_INCLUDE_DIR
   prefix/tbb/{version}/include)

Once you have done this, you can build the project by running:

mkdir build && cd build && cmake .. && make -j

Then you can run the converter by using:

./opentonano {path_to_input.vdb} {path_to_output.nvdb}