XOBS: A formalism for representing the behavior of virtual objects

Any successful technology for the construction of complex virtual worlds must be based on an expandable repository of components and a robust technology for assembling these components into progressively more complex objects and subworlds. There are two aspects to virtual world assembly: construction of physical shape and appearance, and construction of behavior. A representation for behavior that fully supports component-based assembly technology is presented. The representation is embodied in a software product which interfaces easily to existing modeling and rendering software.<
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