How to convert files from BricsCAD
to Open CASCADE?

BricsCAD is a CAD application for 3D mechanical design, simulation, visualization and documentation. It is built on ShapeManager, geometric modeling kernel by Autodesk.

BricsCAD enables 2D and 3D data integration in a single environment, virtually representing the final product. It allows users to check the form, fit, and functions of the product before it is built. The application provides strong parametric, direct edit and freeform modeling tools as well as multi-CAD translation abilities.

In solid modeling and computer-aided design, boundary representation—often abbreviated as B-rep or BREP—is a method for representing shapes using the limits. A solid is represented as a collection of connected surface elements, the boundary between solid and non-solid.

Boundary representation of models are composed of two parts: topology and geometry (surfaces, curves and points). The main topological items are: faces, edges and vertices. A face is a bounded portion of a surface; an edge is a bounded piece of a curve and a vertex lies at a point. Other elements are the shell (a set of connected faces), the loop (a circuit of edges bounding a face) and loop-edge links (also known as winged edge links or half-edges) which are used to create the edge circuits. The edges are like the edges of a table, bounding a surface portion.

Compared to the constructive solid geometry (CSG) representation, which uses only primitive objects and Boolean operations to combine them, boundary representation is more flexible and has a much richer operation set. In addition to the Boolean operations, B-rep has extrusion (or sweeping), chamfer, blending, drafting, shelling, tweaking and other operations which make use of these.