A method for haptically deforming a virtual surface within a haptic virtual environment is used to plastically deform the virtual surface of a virtual object by sensing a user's position in real space, determining a haptic interface location in the haptic environment based thereon, and determining whether...http://www.google.de/patents/US6191796?utm_source=gb-gplus-sharePatent US6191796 - Method and apparatus for generating and interfacing with rigid and deformable surfaces in a haptic virtual reality environment
