[Gmsh] Problem with Ruled Surface interpolation in Gmsh 2.6?

[Christophe Geuzaine]

Trevor - I've restored the old kind of transfinite interpolation with an option (not the best solution, but it will at least solve the problem for now): set

  Geometry.OldRuledSurface=1; 

to restore things to the way they were in 2.5.

Thanks for the report,

Christophe

On 22 Jan 2013, at 17:25, Trevor Strickler <trevor.strickler at gmail.com> wrote:

> Hello,
> 
> A few weeks ago, I wrote because I was having troubles with ruled surfaces in Gmsh 2.6.  I had some triangular patches that worked well in 2.5 but were too curvy in 2.6. I finally figured out how to revert Gmsh 2.6 ruled surface interpolation of triangular patches back to that of 2.5 so that I can mesh my geometry with in 2.6.  One must change GeoInterpolation.cpp AND gmshEdge::reparamOnFace().   
> 
> Anyway, I think you should keep the old style of triangular ruled surface interpolation as an option, at least.  I can see how both approaches could be useful in different situations. However, I think it is important to allow meshing of a simple curved triangular patch without such such strong curvature--curvature which is demonstrated by running the attached file in Gmsh 2.6.
> 
> Cheers,
> 
> Trevor Strickler
> Rice University
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine