Alex Vakaloudis
Babis Theodoulidis
ABSTRACT
The introduction of VRML has facilitated the production of virtual worlds. Apart from being a format for defining 3D geometries, VRML also provides the foundation for specifying interactive behaviour. However this mechanism is rather primitive, there is no direct modelling for composite events or conditions and no efficient treatment of time. The approach presented in this paper, seeks to address these issues while formalising interactive behaviour in 3D-spatiotemporal worlds. We define the 3D-STECA (3D-SpatioTemporal Event Condition Action) Rules which apply to the user and the objects of a virtual environment. The set of rules comprise a scenario which can be mapped to VRML or Java3D. With this work we document behaviour by using formal expressions and provide the basis for guaranteeing consistency in the interaction.
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Index Terms
- Formalising interactive behaviour in 3D-spatiotemporal worlds
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