Abstract
Internet technology opens up another domain for building a future CAD/CAM environment. The environment will be global, network-centric, and spatially distributed. In this paper, we present an approach to network-centric virtual prototyping (NetVP) in a distributed design environment. The presented approach combines the current virtual assembly modelling and analysis technique with distributed computing and communication technology for supporting virtual prototyping activities over the network. This paper focuses on shape representation and interoperability of product models for distributed virtual prototyping. STEP standard and CORBA-based interfaces allow bi-directional communication between the CAD model and the virtual prototyping model, which makes it possible to solve the problems of interoperability, heterogeneity of platforms, and data sharing. STEP AP203 is used as a means of transferring and sharing product models. In addition, Attributed Abstracted B-rep (AAB) is introduced as 3D shape abstraction for transparent transmission of 3D models and for the maintenance of naming consistency between CAD models and virtual prototyping models over the network.
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