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Issue No. 05 - May (2011 vol. 17)
ISSN: 1077-2626
pp: 655-668
Helmut Prendinger , National Institute of Informatics, Tokyo
Sebastian Ullrich , RWTH Aachen University, Aachen
Arturo Nakasone , National Institute of Informatics, Tokyo
Mitsuru Ishizuka , University of Tokyo, Tokyo
The aim of this paper is two-fold. First, it describes a scripting language for specifying communicative behavior and interaction of computer-controlled agents ("bots”) in the popular three-dimensional (3D) multiuser online world of "Second Life” and the emerging "OpenSimulator” project. While tools for designing avatars and in-world objects in Second Life exist, technology for nonprogrammer content creators of scenarios involving scripted agents is currently missing. Therefore, we have implemented new client software that controls bots based on the Multimodal Presentation Markup Language 3D (MPML3D), a highly expressive XML-based scripting language for controlling the verbal and nonverbal behavior of interacting animated agents. Second, the paper compares Second Life and OpenSimulator platforms and discusses the merits and limitations of each from the perspective of agent control. Here, we also conducted a small study that compares the network performance of both platforms.
Artificial, augmented, and virtual realities, graphical user interfaces, synchronous interaction, visualization, markup languages, scripting languages.

M. Ishizuka, H. Prendinger, S. Ullrich and A. Nakasone, "MPML3D: Scripting Agents for the 3D Internet," in IEEE Transactions on Visualization & Computer Graphics, vol. 17, no. , pp. 655-668, 2010.
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