Systems and methods provide a user the ability to select three-dimensional virtual objects in a three-dimensional modeling environment using two-dimensional representations of the objects. In broad overview, the invention involves a multidimensional degree of freedom haptic interface that controls a...http://www.google.de/patents/US6671651?utm_source=gb-gplus-sharePatent US6671651 - 3-D selection and manipulation with a multiple dimension haptic interface
