Good morning.
I developed a plugin called Horse that might help (available on Food4Rhino). Horse allows to import, analyse and manipulate Motion Capture data from csv. files. The csv. file should have several rows (corresponding to the frames) and columns (corresponding to the coordinate x, y and z of each point in a consecutive manner).
These example was made through a capture of a person playing badmington (for biomechanics) with the Qualisys system.
