Module subdivision 

Mesh subdivision schemes.

Provides:

• Midpoint (linear) subdivision: split each edge at midpoint, 1→4 triangles.
• Loop subdivision: smooth approximating scheme for triangle meshes.
• Butterfly subdivision: interpolating scheme for triangle meshes.
• Catmull–Clark subdivision: approximating scheme for quad meshes.
• Doo–Sabin subdivision: dual approximating scheme.
• Simple quad midpoint subdivision.
• Adaptive subdivision based on element quality thresholds.

Structs

QuadMesh

A quad mesh used by Catmull–Clark subdivision.

SubdivMesh

A triangle mesh used as input/output for subdivision.

Enums

AdaptiveCriterion

Criterion for adaptive subdivision.

Functions

adaptive_midpoint_subdivision

Apply adaptive midpoint subdivision to a triangle mesh.

butterfly_subdivision

Apply one level of Butterfly subdivision.

catmull_clark_subdivision

Apply one level of Catmull–Clark subdivision to a quad mesh.

doo_sabin_step

Apply one level of Doo–Sabin subdivision (face-based dual scheme).

loop_subdivision

Apply one level of Loop subdivision.

midpoint_subdivision

Apply one level of midpoint (linear) subdivision.

subdivide_n_times_butterfly

Apply n levels of Butterfly subdivision.

subdivide_n_times_loop

Apply n levels of Loop subdivision.

subdivide_n_times_midpoint

Apply n levels of midpoint subdivision.

subdivide_quad_n_times

Apply n levels of Catmull–Clark subdivision to a quad mesh.