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Chapter 9. Subdiv Surfaces > Subdiv Surface Components

Subdiv Surface Components

Subdiv surfaces have four types of components in standard mode: face, vertex, UV, and edge.

  • A face generally appears offset from the subdiv surface. It can have three or more sides; however, the most efficient subdiv surfaces have four sides. The number in the center indicates the display level (Figure 9.3).

    Figure 9.3. This subdiv surface sphere is at display level-0 and has its faces displayed.

  • A vertex generally appears offset from the surface. It is represented by the number of the display level it occupies. When moved, the vertex controls the area of surface nearest to it (Figure 9.4).

    Figure 9.4. A subdiv vertex, at display level-1, has been moved. The surface responds much as a NURBS surface responds to movement of a control vertex.

  • UVs are points that turn green when selected (Figure 9.5). They are used for texturing, not modeling. See Chapter 15, “Shaders, Materials, and Mapping.”

    Figure 9.5. UVs don’t have associated display levels. Thus, they show up as points, not numbers.

  • An edge is one border of a face (Figure 9.6).

    Figure 9.6. An edge of the sphere is selected in standard mode.


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