Function create_face_from_diagonals 

pub fn create_face_from_diagonals(
    block: &Block,
    imin: usize,
    jmin: usize,
    kmin: usize,
    imax: usize,
    jmax: usize,
    kmax: usize,
) -> Face

Build a face from diagonal index pairs on a block.

Arguments

• block - Parent block.
• imin, jmin, kmin - Lower corner indices.
• imax, jmax, kmax - Upper corner indices.

Returns

New Face populated with the four corner nodes.