[Gmsh] Documentation on Quality Histograms

[Christophe Geuzaine]

Jacques Kools wrote:
> Gentlemen,
>  
> we are looking at quantifying 3D mesh quality using the histograms 
> available via the "Statistics" entry under "Tools". We could not find 
> the definition of the three metrics (rho ,eta , gamma) in the 
> documentation. What is exactly being plotted there ??
>  

Hi Jacques:

rho ~ min_edge_length / max_edge_length
eta ~ volume^(2/3) / sum_edge_length^2
gamma ~ volume / sum_face_area / max_edge_length

Have a look at Mesh/Simplex.cpp for the exact definitions.

Take care,

Christophe

-- 
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org