[Gmsh] 360 degree rotation of structured hexahedral mesh using OpenCASCADE factory leads to "findRootSourceFaceForFace() failed"

[Sigve Karolius]

Hello,


First of all I would like to thank you for making the excellent GMSH software publicly available.


Now on to my question. I am trying to rotate a surface around an axis four times; thus, generating a structured hex mesh of a volume in the shape of a "shell".


In the attached example you can try to generate the shape of a hollow pipe (simple example for illustration purposes) with and without  `SetFactory("OpenCASCADE");` by rotating a rectangle four times about an axis. By running the example (requires version 3.X) in the GUI you can see how the error `findRootSourceFaceForFace() failed` appears when the OpenCASCADE is used. The attached PNGs are screenshots of the respective result.


My question is if there is simply something I have completely missed in the manual?


Regards,


Sigve Karolius



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://onelab.info/pipermail/gmsh/attachments/20180820/2db5610f/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: no_opencascade.png
Type: image/png
Size: 168808 bytes
Desc: no_opencascade.png
URL: <http://onelab.info/pipermail/gmsh/attachments/20180820/2db5610f/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: opencascade.png
Type: image/png
Size: 104251 bytes
Desc: opencascade.png
URL: <http://onelab.info/pipermail/gmsh/attachments/20180820/2db5610f/attachment-0003.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: untitled.geo
Type: application/octet-stream
Size: 6013 bytes
Desc: untitled.geo
URL: <http://onelab.info/pipermail/gmsh/attachments/20180820/2db5610f/attachment-0001.geo>