This video demonstrates how the sine wave fitting responds to walking motions, for a walking-in-place application. From IEEE Computer Graphics and Applications magazine's May/June 2013 article, "Creating Widely Accessible Spatial Interfaces: Mobile VR for Managing Persistent Pain," by David Schroede, Fedor Korsakov, Joseph Jolton, Francis J. Keefe, Alex Haley, and Daniel F. Keefe.