On Choosing the Technology of Application Software Integration with a CAD-System

Computer programs for scientific research with complex geometric models should be integrated with a CAD-system. In the paper, we consider three approaches based on data exchange in the DXF (drawing exchange format); COM-technologies; and application programming interface (API) ObjectARX. DXF data exchange with CAD is a simple and universal way available to most researchers, but it excludes interactive CAD control. COM technologies provide simple, reliable mechanisms of interactive CAD control from an external program, although they do not have the highest level of performance. Combination with DXF increases their performance. For problems with complex geometric models, Auto-CAD-system provides ObjectARX API and .NET API — low-level technologies that ensure the maximum possible functionality and performance, compared to other technologies, but have some limitations. We present program listings that simplify the understanding of considered technologies. Their performance analysis has been conducted, and recommendations for their use are given from the researcher's perspective.