> On 30 Oct 2018, at 23:19, Jensen, Aaron J. <[email protected]> wrote:
>
> Hello,
>
> I am working on a fairly complicated 3D model and mesh using gmsh that
> requires OpenCascade (for Boolean operations mostly). I have been running
> into some odd issues near some of the edges which I originally thought might
> be overcome by modifying my Boolean operations. However, after quite a bit
> of testing I found the problem occurs for even a simple script:
>
> SetFactory("OpenCASCADE");
> Mesh.CharacteristicLengthMax = 1.0;
> Cylinder(1) = {0, 0, 70.0, 0, 0, 60.0, 50.0};
>
> I set all of the gmsh options to their defaults except for viewing element
> faces and you can see the resulting image attached. I finally discovered
> that this does not occur in version 3.0.6 of gmsh but it does occur in
> version 4.0.4. Have you seen this behavior? I presume this is a bug or
> there is a flag of some kind that I need to set?
Thanks for the report - this is indeed a bug. As a workaround force e.g. the
frontal algorithm:
SetFactory("OpenCASCADE");
Mesh.CharacteristicLengthMax = 1;
Cylinder(1) = {0, 0, 70.0, 0, 0, 60.0, 50.0};
Mesh.Algorithm = 6;
Christophe
>
> Thanks,
> Aaron
> <gmshCylinder.png>_______________________________________________
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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