[Gmsh] Gaps and overlaps when using extrude command

[jeremy theler]

I am not sure because I seldom use the GUI. But what I am pretty sure of is
that Gmsh works the way it should.

It would help to know what the actual errors you get are.

--
jeremy theler
www.seamplex.com

On Sat, Aug 15, 2020, 07:25 Bart Deschoolmeester <
bart.deschoolmeester at bbri.be> wrote:

> Thanks again, Jeremy.
>
> You seem to have nailed the origin of the problem.
>
> It still feels as a bug to me that reloading a script one just created,
> gives a different result.
>
> Or am I missing something on how GMSH works?
>
>
>
> Stranger still:
>
> Action 1:
>
> Load the file below (without Coherence in the script).
>
> Click: 3D then Coherence then again 3D. This gives an error.
>
> Action 2:
>
> Load the file below (without Coherence in the script).
>
> Click: 3D then Coherence then 1D then again 3D. This gives the wanted
> results.
>
>
>
> This seems all unintuitive to me. Am I missing something of the GMSH logic?
>
> e.g. doesn’t clicking on the coherence command, execute that coherence
> command?
>
>
>
> Bart
>
>
>
>
>
>
>
> KanR = DefineNumber[ 0.1, Name "Parameters/KanR" ];
>
> WanD = DefineNumber[ 0.2, Name "Parameters/WanD" ];
>
> KanMeshsize = DefineNumber[ 0.01, Name "Parameters/KanMeshsize" ];
>
> SetFactory("OpenCASCADE");
>
> Rectangle(1) = {-2.5, -2.5, 0, 5, 5, 0};
>
> Circle(5) = {0, 0, 0, KanR, 0, 2*Pi};
>
> Curve Loop(2) = {5};
>
> Plane Surface(2) = {2};
>
> BooleanDifference{ Surface{1}; Delete; }{ Surface{2}; Delete; }
>
> Extrude {0, 0, WanD } {
>
>   Surface{1};
>
> }
>
> Point(15) = {0, KanR, 0};
>
> Point(16) = {0, KanR-0.05, 0};
>
> Point(17) = {0, KanR-0.05, WanD};
>
> Point(18) = {0, KanR, WanD};
>
> Line(20) = {15, 16};
>
> Line(21) = {16, 17};
>
> Line(22) = {17, 18};
>
> Line(23) = {18, 15};
>
> Curve Loop(24) = {20, 21, 22, 23};
>
> Plane Surface(8) = {24};
>
> Extrude {{0, 0, 1}, {0, 0, 0}, Pi} {
>
>   Surface{8}; Layers {10};
>
> }
>
> Field[1] = Distance;
>
> Field[1].EdgesList = {5};
>
> Field[1].NNodesByEdge = 50;
>
> Field[2] = Threshold;
>
> Field[2].DistMax = 2.5;
>
> Field[2].DistMin = 0;
>
> Field[2].IField = 1;
>
> Field[2].LcMax = 0.25;
>
> Field[2].LcMin = KanMeshsize ;
>
>
>
> Background Field = 2;
>
>
>
> Mesh.CharacteristicLengthExtendFromBoundary = 0;
>
> Mesh.CharacteristicLengthFromPoints = 0;
>
> Mesh.CharacteristicLengthFromCurvature = 0;
>
>
>
>
>
>
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