Walking through the process of creating what he calls the Sliding Pivot Foot Roll in Autodesk Maya, Armin Halac shows how to create a foot rig where the pivot is dynamic and can be moved to any part of the foot.

In this tutorial Armin Halac shows how you can create a sliding pivot foot roll using nodes

Moreover, Armin shows how to create a sliding foot pivot completely using Maya Nodes. Armin notes that for the most part, this technique builds upon Chris Lesage’s foot rig, adding the ability to make the rig work on any shape. Check out the tutorial for Creating a Sliding Pivot Foot Roll in Maya here.