From Fast-BVH

Empty on creation. Populated after charts are packed.

From Fast-BVH

Basis class to compute tangent space basis, ortogonalizations and to transform vectors from one space to another.

Simple bit array.

Wrapping this in a class allows temporary arrays to be re-used.

A group of connected faces, belonging to a single atlas.

Set of charts corresponding to mesh faces in the same face group.

Charts are found by floodfilling faces without crossing UV seams.

- Insertion is o(n) - Smallest element goes at the end, so that popping it is o(1).

References invalid faces and vertices in a mesh.

Output mesh.

Input mesh declaration.

Used to map triangulated polygons back to polygons.