planes_faces: for every plane, a list of faces within this plane
planes_transform: for every plane, a matrix which transforms the
plane into the 2D XY plane
faces_plane: for every face, which plane is it in
faces_winding: for every face within its plane, is the face's normal
aligned with the plane's normal (true) or flipped 180 degrees (false).
faces_plane: number[]
faces_winding: boolean[]
planes: { normal: number[]; origin: number[]; }[]
planes_faces: number[][]
planes_transform: number[][]
Description
Cluster the faces of a graph into groups of face indices where
all faces in the same group lie in the same plane in 3D.
Faces in the same plane are not required to overlap, only be coplanar.
a FOLD object