[Gmsh] Bug Report :Extrude to make spiral

[Christophe Geuzaine]

Jacques Kools wrote:

> Gentlemen,
> 
> first of all : congrats with GMSH and GetDP. I think it can look a
> lot of commercial products straight in the eye !!
> 
> Second: I was trying to make a spiral by a combined
> translation/rotation extraction (geo file attached) and I found that
> the shape becomes quite funky. When I try to make a 3D mesh, it urges
> me to send a bug report.
> 

The geometrical shape you generate is singular (it wraps around itself).
See the attachment for how I would do it.

Cheers,

Christophe

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

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