// EV #E by 2, Stores the edge description as pair of indices to vertices
// EV #E by 2, Stores the edge description as pair of indices to vertices
// FE : #F by max(D), Stores the Face-Edge relation
// FE : #F by max(D), Stores the Face-Edge relation
// EF : #E by 2: Stores the Edge-Face relation
// EF : #E by 2: Stores the Edge-Face relation
// EFi: #E by 2: corresponding to EF and stores the relative position of the edge in the face (e.g., if the edge is (v1,v2) and the face has (vx,vy,v2,v1,vz,va), then the value is 3)
// EFi: #E by 2: corresponding to EF and stores the relative position of the edge in the face (e.g., if the edge is (v1,v2) and the face has (vx,vy,v2,v1,vz,va), then the value is 2)
// EFs: #E by 2: if the edge is oriented positively or negatively in the face (e.g. in the example above we get -1)
// FEs: #F by max(D): if the edge is oriented positively or negatively in the face (e.g. in the example above we get -1)
// InnerEdges: indices into EV of which edges are internal (not boundary)
// InnerEdges: indices into EV of which edges are internal (not boundary)