Dialogue structures for virtual worlds

Abstract. DLoVe (Distributed Links over Variables evaluation) is a new model for specifying and implementing virtual reality and other next-generation or "non-WIMP" user interfaces. Our approach matches the parallel and continuous structure of these interfaces by combining a data-flow or constraintlike component with an event-based component for discrete interactions. Moreover, because the underlying constraint graph naturally lends itself to parallel computation, DLoVe provides for the constraint graph to be partitioned and executed in parallel across several machines, for improved performance. With our system, one can write a program designed for a single machine but can execute it in a distributed environment with minor code modifications. The system also supports mechanics for implementing or transforming single user programs into multi-user programs. We present experiments demonstrating how DLoVe improves performance by dramatically increasing the validity of the rendered frames. We also present performance measures to measure statistical skew in the frames, which we believe is more suitable for interactive systems than traditional measures of parallel systems, such as throughput or frame rate, because they fail to capture the freshness of each rendered frame.

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Section: Constraints and Solvingmentioning

confidence: 99%

Improving Performance of Virtual Reality Applications Through Parallel Processing

Deligiannidis

Jacob

2005

J Supercomput

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“…Several interfaces incorporate traditional animation effects [3] [10]. Virtual reality research frequently coordinates simulation and novel interface devices with animation [13].…”

Section: Control Presentationmentioning

confidence: 99%

“…WorkingQ represents the current positions in the search. While there are still plans in WorkingQ, we remove the first element, call it RootPlan, call this plan's start state RootState, and its operator sequence RootOps (lines [12][13][14][15]. It is from these roots that we try to build the next plans.…”

Section: Algorithmmentioning

confidence: 99%

Planning-based control of interface animation

Kurlander

Ling

1995

Proceedings of the SIGCHI Conference on Human Factors in Computing Systems - CHI '95

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Animations express a sense of process and continuity that is difficult to convey through other techniques. Although interfaces can often benefit from animation, User Interface Management Systems (UIMSs) rarely provide the tools necessary to easily support complex, state-dependent application output, such as animations. Here we describe Player, an interface component that facilitates sequencing these animations. One difficulty of integrating animations into interactive systems is that animation scripts typically only work in very specific contexts. Care must be taken to establish the required context prior to executing an animation. Player employs a precondition and postcondition-based specification language, and automatically computes which animation scripts should be invoked to establish the necessary state. Player's specification language has been designed to make it easy to express the desired behavior of animation controllers. Since planning can be a timeconsuming process inappropriate for interactive systems, Player precompiles the plan-based specification into a state machine that executes far more quickly. Serving as an animation controller, Player hides animation script dependencies from the application. Player has been incorporated into the Persona UIMS, and is currently used in the Peedy application.

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“…Most of this work has thus far concentrated on the architecture or toolkit level, rather the user interface description language. Lewis, Koved, and Ling, addressed non-WIMP interfaces with one of the first UIMSs for virtual reality using concurrent event-based dialogues [14]. Parallel Virtual Machine PVM is a message-passing software system that allows the utilization of a heterogeneous network of parallel and serial computers as a single computational resource [38].…”

Section: Related Workmentioning

confidence: 99%

DLoVe: using constraints to allow parallel processing in multi-user virtual reality

Deligiannidis

Jacob

Proceedings IEEE Virtual Reality 2002

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Dialogue structures for virtual worlds

Abstract: We describe a so~tware architecture for virtual worlds, built on a base of multiple proccsscs conl-

Cited by 22 publications

References 7 publications

Improving Performance of Virtual Reality Applications Through Parallel Processing

Improving Performance of Virtual Reality Applications Through Parallel Processing

Planning-based control of interface animation

DLoVe: using constraints to allow parallel processing in multi-user virtual reality

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