From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. byZeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox
A sensor node senses the user actions with a pointing device, such as mouse.
There are two different pointing device types: 2-D pointing devices and 3-D pointing devices.
Mouse, trackball, trackpad and joystick belong to the first class.
A data glove and a CAVE wand belong to the second class.