The wireframe model and the solid model are worth mentioning. Another method is Constructive Solid Geometry (CSG), which works with spatial primitives. The basis of the CSG method is three-dimensional geometric models such as the sphere or pyramid, the cuboid, cylinder, ring or others.
In the CSG method, Boolean operations are used to combine the basic models in a linkage hierarchy. By adding or subtracting several base models, new models are created, which in turn can be combined with surfaces or solids.
In this way, complex bodies can be modeled with recesses and protrusions, which in principle are combined from several individual objects.