3.8.2: Subdivison
Now we can show how subdivision proceeds with the modified Loop rules. The implementation here applies subdivision a fixed number of times to generate a triangle mesh for rendering; Exercise 3.11 at the end of the chapter discusses adaptive subdivision, where each original face is subdivided enough times so that the result looks smooth from a particular viewpoint rather than just using a fixed number of levels of subdivision, which may over-subdivide some areas while simultaneously under-subdividing others.
The 〈Refine subdivision mesh into triangles〉 fragment repeatedly applies the subdivision rules ...
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