A simple footskate removal method for virtual reality applications

Lyard, E. and Magnenat-Thalmann, N.

Abstract: Footskate is a common problem encountered in interactive applications dealing with virtual characters animations. It has proven to be hard to fix without the use of complex numerical methods which require expert skills for their implementations, along with a fair amount of user interaction to correct a motion. On the other hand, deformable bodies are being increasingly used in Virtual Reality (VR) applications, allowing users to customize their avatar as they whish. This introduces the need of adapting motions without any help from a designer, as a random user seldom has the skills required to drive the existing algorithms towards the right solution. In this paper, we present a simple method to remove footskate artifacts in VR applications. Unlike previous algorithms, our approach doesn’t rely on the skeletal animation to perform the correction but rather on the skin. This ensures that the final foot planting really matches the virtual character’s motion. The changes are applied to the root joint of the skeleton only so that the resulting animation is as close as possible fromthe original one. Eventually, thanks to the simplicity of its formulation, it can be quickly and easily added to existing frameworks.

  journal = {The Visual Computer},
  author = {Lyard, E. and Magnenat-Thalmann, N.},
  title = {A simple footskate removal method for virtual reality applications},
  publisher = {Springer-Verlag},
  volume = {Vol. 23},
  number = {No. 9},
  pages = {689-695},
  year = {2007},
  topic = {Motion Capture, Body Animation and Control}