Convert IGS to BREP

The IGS file extension refers to the Initial Graphics Exchange Specification (IGES), a standardized ASCII-based format developed by the United States Air Force under the ICAM (Integrated Computer-Aided Manufacturing) program in the late 1970s. Designed to facilitate interoperability among diverse CAD systems, IGS files store 2D and 3D vector data including wireframes, surface models, and engineering drawings. Widely adopted across aerospace, automotive, and defense industries, IGES became an ANSI standard in 1980 and was instrumental in streamlining digital product data exchange. Although superseded by newer formats like STEP, IGS remains relevant for legacy system compatibility and long-term archival of CAD data.

The BREP file extension stands for Boundary Representation, a format used by Open CASCADE Technology to store precise 3D model data. It encodes topological and geometric elements such as vertices, edges, faces, and solids, along with spatial orientation and triangulation details. Widely adopted in CAD applications, BREP files support accurate modeling of complex mechanical parts and assemblies. Originating from Matra Datavision's CASCADE platform in the 1990s and later maintained as open-source by Open CASCADE, the format remains integral to engineering workflows requiring high-fidelity surface and solid modeling.