[Gmsh] Postprocessing high-order fields - strange colors

Christophe Geuzaine cgeuzaine at ulg.ac.be
Wed Jan 4 12:02:48 CET 2017

> On 22 Dec 2016, at 18:52, Grégory LEGRAIN <gregory.legrain at ec-nantes.fr> wrote:
> I have also seen this in the last version of gmsh (even for P1 fields). It seems linked to the lighting : if you swap the viewpoint from +z to -z, everything is OK.
> Alternatively, you can also disable lighting in the options of the view.

The default lighting option changed in recent builds, from "two-side" to "single side" : beside being faster, it also allows to see when surfaces are not oriented correctly.

You can restore "two-side" lighting in Options->Color->Use two-side lighting.

Adaptive visualization can indeed change the orientation of the mesh: we will fix this.


> Best regards,
> Gregory
> Le 21/12/2016 à 19:09, Martin Vymazal a écrit :
>> Hello,
>> when I open a field stored in gmsh on high-order elements (i.e. at least P2) and click on Tools -> Options -> Adapt visualization grid, the colors in the plot suddenly become much darker (observed with recent builds of gmsh). These colors are then preserved when I save the plot to a file (say png). Could you please fix this. Thank you.
>> Best regards,
>> Martin
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 

Free software: http://gmsh.info | http://getdp.info | http://onelab.info

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