Computes the average length of all face edges (each edge is counted once
per incident face, so edges shared by two faces are counted twice). Useful
as a scale-aware reference length, e.g. to derive a vertex-merge tolerance
such as the one used internally by vcg_fix_defects.
Examples
if (is_not_cran()) {
sphere <- vcg_sphere()
vcg_average_edge_length(sphere)
}
#> [1] 0.1507297