Abstract
Multipurpose visualization toolkit AVS/Express provides visualization function as an object called "module" and user can change visualization parameters (e.g. level of isosuface, slice axis and plain) interactively. However in VR environment (e.g. CAVE), It is difficult for observer to change visualization parameters. We improve the user interface to change visualization parameters using simple menu on PDA within the CAVE environment. Using the PDA device, users can easily change visualization parameters in VR environment.
