Abstract
While standards for the exchange of wireframe and surface models have been in use in industry for a couple of years, there so far exists no such standard for solid model exchange. The present paper gives a short overview of some concepts that have been recently developed for the exchange of solid models. The solids interface developed in the ESPRIT Project No. 322 CAD-Interfaces (CAD∗I) is described in some detail. The development of prototype processors for the Matra Datavision EUCLID system and first test parts are presented. Finally, the influence of the CAD∗I project on the development of the international standard STEP is outlined.
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