Is the root joint concerned as free joint?

[xiaohu-art]

Hi, thanks for your work.
I am curious about the estimated 3D pose.
Is the root joint regarded as a free joint?
In the demo script, I noticed the zero index of the outputed result is forced to be zero.

[xiu-cs]

Hi @xiaohu-art, the prediction is a root-relative 3D pose, and the zero index is the root joint.