Really interesting experiments using open frameworks in collaboration with dancers wearing Motioner. They call it the RAMDanceToolkit  and it was created by YCAM InterLab, including Yoshito Onishi, Satoru Higa, Motoi Shimizu and Kyle McDonald (who does super interesting work).

Check out this second video if you really want to get under the hood.

For more  info at RAMDanceToolkit wiki. Download Mac and Windows applications here or visit GutHub for full source including addons.