The correct answer is: C. boundary representation.
Boundary representation (B-rep) is a method of representing 3D objects by defining the surfaces that enclose them. It is a common method used in computer-aided design (CAD) and computer-aided manufacturing (CAM).
In B-rep, each face is defined by a set of edges, and each edge is defined by a set of vertices. The topology of the faces, edges, and vertices is stored in a data structure called a face graph. The surface in which each face lies is defined by a set of equations that describe the surface’s shape.
B-rep is a powerful method for representing 3D objects because it can represent complex shapes with a high degree of accuracy. It is also a relatively efficient method for storing and manipulating 3D data.
The other options are incorrect for the following reasons:
- Constructive solid geometry (CSG) is a method of representing 3D objects by combining simpler objects using Boolean operations such as union, intersection, and difference.
- Layering is a method of representing 3D objects by stacking layers of 2D shapes.
- Isometric is a type of projection that shows three sides of an object at the same time.
I hope this helps! Let me know if you have any other questions.