The [hexasphere] library provides a customizable interface for subdividing 3D

triangle meshes. Custom and stateful interpolation functions can be implemented

as well as per-vertex attributes.

All that's required to define a base shape are the initial vertices, triangles

based on the indices of the vertices in the initial vertices, and numbered

edges. As long as the winding of the triangles remains consistend throughout

the base mesh, all of the resulting triangles will retain that winding.

This library also provides a few interesting base shapes (which can be used alone

if the shape is not subdivided):

Icosahedron, Tetrahedron, Cube, Square Plane, Triangle Plane

(all of which are pictured above).

[hexasphere]: https://crates.io/crates/hexasphere