3MF support for Mittsu.
Just install:
bundle add mittsu-3mf
Then require in your code:
require 'mittsu/3mf'
Currently this gem just includes an exporter. Loading 3MF files is "coming soon".
exporter = Mittsu::ThreeMFExporter.new
exporter.export(object, "output.3mf")
This code was originally written for Manyfold, supported by funding from NLNet and NGI Zero.