Igloo grid, as per Appendix A2 of (http://dx.doi.org/10.1016/j.jmr.2014.05.009).
n_long - number of longitudes in the grid
alps - alpha Euler angles of the grid (radians), zeros because these are two-angle grids bets - beta Euler angles of the grid (radians) gams - gamma Euler angles of the grid (radians) whts - Voronoi tessellation body angle weights vorn - a cell array of matrices containing the coordinates of the vertices of the Voro- noi polyhedra
Below is the Voronoi polyhedra diagram returned by grid_igloo(20).
If no outputs are requested, a schematic is drawn.
Version 2.6, authors: Ilya Kuprov