Graphics Reference
In-Depth Information
Figure 4.1 7. Varying internal factors for a quad.
same way, since the bottom-left and top-right halves of the diagram are effectively mirror
copies.
Triangles have only one internal tessellation factor, and the surface appears to grow
an island of triangles outward from the midpoint as demonstrated in Figure 4.18.
As can be seen in Figure 4.17 and Figure 4.18, having a high internal tessellation
factor with a low edge tessellation factor produces the inverse issue that we saw earlier. In
this case, the interiors of the primitives are highly tessellated, while they must meet up with
very minimal geometry at the edges. Keeping all of the tessellation factors (both internal
Figure 4.18. Varying internal factors for a triangle.
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