[Gmsh] Zero volume elements in Delaunay 2d triangulation

[=?windows-1252?Q?Jean-Fran=8D=E7ois_Remacle?=]

> Sorry. I explained it too fast. It broke on the following step, for a 
> background mesh which I did not send (attached now), with dimensions that are 
> a bit exaggerated.
>
>   
Same issue here,
>
> I got the attached screenshot with the following command
> gmsh ref.geo -algo frontal -bgm ref.xxx2 -rand 1.e-11
> which produces "wrong elements" and was just wondering what is the cause of 
> the "missing edges".
>
>   

 We use robust predicates for doing geometrical operations
on the 2D mesh, so we should certainly be able to do better.
I'll have a look at that whan I have time.

For the "graphical issue", the strange behavior is principally due to 
the way
we use graphics : the zoom exceeds the resolution of the viewport. There 
again,
we should be able to do better. So, what you see is NOT what you get.

JFR

> Regards and thanks again
>
> ZP
>
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