[Gmsh] coloring 2d surfaces

[Ruth V. Sabariego]

Hi Jeremy, 

It looks like the normal of your surfaces is different. I mean the rectangle on the left has an outward normal, the one on the right, an inward one.
For seen the same colors,  you can do two things:
- modifying the geometry for having all normals oriented in the same sense;
- turning off the lighting: Tools->Options->Mesh->Enable lighting, or add "Mesh.Light = 0;" at the beginning of your file.

Ruth



On 24 Apr 2013, at 00:38, jeremy theler <jeremy at talador.com.ar> wrote:

> Dear all,
> 
> Find attached a simple geometry 2D file with a central square surronded by two 
> symmetrical rectangles. Assume the central square is made of one material and 
> the two rectangles are made of another one. Hence, I have two physical 
> entities, one with the central square and other with the two rectangles.
> 
> Now, for the automatic preparation of figures for a report by means of a bash 
> script, I would like to have gmsh to paint the meshes of the rectangles in one 
> color (say red) and the central square in another one (say green).
> 
> By entering 
> 
> Color Green {Surface {12};}
> Color Red {Surface {14, 16};}
> 
> I get the two rectangles in different kinds of red (see attached png). I have 
> tried to reference the physical entity with no luck.
> 
> Moreover, I did not get how the property Mesh.ColorCarousel works.
> 
> 
> BTW, the geo file is just and example I made up in order to ask the question. 
> What I want to accomplish involves more surfaces and physical entities, but 
> the geo files are also only two-dimensional geometries.
> 
> Any help would be appreciated.
> Thanks in advance.
> --
> jeremy
> 
> <color.geo><color.png>_______________________________________________
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—
Dr. Ir. Ruth V. Sabariego
University of Liege, Electrical Engineering and Computer Science
http://ace.montefiore.ulg.ac.be/







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