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<p>Dear Sir or Madam,</p>
<p> I would like to thank you for the great work which has been done
to develop the open-source Gmsh software. <br>
</p>
<p>I am currently working on a 3D numerical method and I think I
have found a bug in the 3D meshing algorithm. I was trying to
generate a transfinite bulk in a mesh (to have a constant
orthogonality of the elements), and an unstructured layer around
it, as shown in the enclosed "sphereTransfinite.png". <br>
</p>
<p>Everything was going fine until I noticed a big error on my
discretized spherical surface, computed with the sum of the areas
of the boundary faces. I found out that my code was unable to find
the neighbours of many tetrahedrons around the bulk mesh because
many faces were not matching but crossing each other edges, as
shown in sphereTransfinite_err.png . <br>
</p>
<p>I didn't find any topics about such problem so I assume that you
didn't know about it, but I might be wrong. <br>
</p>
<p>Best regards, <br>
</p>
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