Decoupled simulation in virtual reality with the MR toolkit

The Virtual Reality VR user interface style allows natural hand and body motions to manipu late virtual objects in D environments using one or more D input devices This style is best suited to application areas where traditional two dimensional styles fall short such as scienti c visualization architectural visualization and remote manipulation Currently the programming e ort required to produce a VR application is too large and many pitfalls must be avoided in the creation of successful VR programs In this paper we describe the Decoupled Simulation Model for creating successful VR applications and a software system that embodies this model The MR Toolkit simpli es the develop ment of VR applications by providing standard facilities required by a wide range of VR user interfaces These facilities include support for distributed computing head mounted displays room geometry man agement performance monitoring hand input devices and sound feedback The MR Toolkit encourages programmers to structure their applications to take advantage of the distributed computing capabilities of workstation networks improving the application s performance In this paper the motivations and the architecture of the toolkit are outlined the programmer s view is described and a simple application is brie y described CR

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