About Subdiv Primitives

Subdiv primitives come in the same six basic shapes as the polygon primitives (Figure 3.63) with one major differencethere are no attributes to adjust.

Figure 3.63. The six subdiv primitives: cube, sphere, cylinder, plane, cone, and torus.

Like the other primitives you have read about, you can use these six basic shapes to start modeling from and add detail using the modeling tools. As we will discuss in more detail in Chapter 9, "Subdiv Surfaces," you can also convert the other primitives into subdiv surfaces and use the polygonal modeling tools to indirectly manipulate a subdiv model.