Boundary Representation, often abbreviated as B-rep, is a method used in computer graphics and computer-aided design (CAD) 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 by detailing how the surfaces connect and interact. In B-rep, the geometry of an object is described mathematically, enabling accurate rendering and manipulation. This representation is particularly useful in applications like 3D printing and virtual reality, where understanding the object's surface is crucial for creating realistic visualizations and physical models.