vcg_average_edge_length: Compute the average edge length of a triangular mesh
Description
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.
Usage
vcg_average_edge_length(mesh)
Value
A single numeric value: the average edge length, in mesh units.