B-rep, or Boundary Representation, is a method used in computer graphics and CAD (Computer-Aided Design) to represent the shape of a 3D object. It defines the object by its boundaries, which include vertices, edges, and faces. This approach allows for precise modeling of complex shapes and is widely used in various industries, including architecture and engineering. In B-rep, the geometry of an object is described mathematically, enabling software to render it accurately. This representation is particularly useful for tasks like 3D printing and simulation, where understanding the object's surface is crucial for creating physical models or analyzing performance under different conditions.