Proxy-based Haptic Feedback from Volumetric Density Data

In this paper a new approach to volume haptics is presented. The developed method makes use of a proxy that is constrained by .virtual surfaces., defined by the local gradient at the proxy position, and not by iso-values as in other approaches to volume haptics. By using a proxy, material properties like friction, stiffness and surface penetrability can be implemented. These material properties are controlled by user defined transfer functions. At the same time, using the gradient to define surfaces, rendering of infinitesimally close virtual surfaces that can be penetrated, is made possible. The algorithm exhibits very high stability, is fast and represents fine details accurately. Compared to earlier techniques, less artifacts occur and higher configurability is provided.

@inproceedings{LYG02,
  author       = {Lundin, Karljohan and Ynnerman, Anders and Gudmundsson, Bj{\"o}rn},
  title        = {{Proxy-based Haptic Feedback from Volumetric Density Data}},
  booktitle    = {Eurohaptics Conference},
  pages        = {104-109},
  year         = {2002}
}