I was reading about iPi's rig on the wiki, and apparently it has an odd setup.

Here is a comparison image:

http://i.imgur.com/VFtNDOL.png

On the left is standard Blender's (and most likely animators use the same setup in any other 3D apps) pelvic/hips setup and on the right is what iPi has.

I assume bones connecting vertical hip bone and legs don't do anything meaningful for animation. So technically I need to convert motion of vertical hip bone to motion of the horizontal him bone.

Is there any way to setup iPi's rig in the same way my Blender rig is set up?