How to convert WRL
to Open CASCADE?

WRL is an extension of the VRML (Virtual Reality Modeling Language) format, which enables browser plugins to display virtual reality environments.

The WRL file contains data about the coordinates of the initial viewpoints, vertices and faces, as well as surface colors, transparency, textures, etc.

The WRL format is saved in ASCII text format and can be opened with various CAD programs such as Parallel Graphics Cortona3D Viewer and IMSI Design TurboCAD.

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.