c3d_importer is a script that loads Graphics Lab Motion Capture file
MAY I HAVE A DEMO ?
For sure, download the demo_c3d.blend .. the c3d_importer script is already loaded in it.
Run the script (Alt-P with mouse over TextEditorWindows)
Choose the 18_01.c3d with the file selector that is displayed.
Press import C3D button
HOW TO INSTALL THIS SCRIPT ?
file into the ".blender/scripts" directory of
your Blender installation.
In a Script window, go to the "Script"
menu entry and perform an "Update
Now, still in a Script window, go to Menu "Script->Import".
You should see a "Motion Capture (.c3d)..." entry.