GitLab

Hi everybody

My very first post and it is very simple: just a unit square geometry. This short .geo file uses the Gmsh 4.7.1 keywords. AttractorAnisoCurve should be computing the distance from Line(1) only, using the defaults for this field as listed in the Gmsh manual.

------- start of script -------

lc = .01;

Point(1) = { 0, 0, 0, lc} ; Point(2) = { 1, 0, 0, lc} ; Point(3) = { 1, 1, 0, lc} ; Point(4) = { 0, 1, 0, lc} ;

Line(1) = {1,2} ; Line(2) = {2,3} ; Line(3) = {3,4} ; Line(4) = {4,1} ;

Curve Loop(1) = {1, 2, 3, 4} ;

Plane Surface(1) = {1} ; //air only

Field[1] = AttractorAnisoCurve; Field[1].CurvesList = {1};

Background Field = 1;

Mesh.CharacteristicLengthFromPoints = 0; Mesh.CharacteristicLengthExtendFromBoundary = 0;

------- end of script -------

When you click on Mesh 2D in the GUI you end up with a mesh dimension in the direction tangent to Line(1) that varies as you move away from Line(1) even though it is clear from the defaults that SizeMaxTangent = SizeMinTangent = .5

Moreover, you get the same generated mesh irrespective of the values you assign to any of this field keywords

Field[1].NumPointsPerCurve Field[1].dMax Field[1].dMin Field[1].SizeMaxNormal Field[1].SizeMaxTangent Field[1].SizeMinNormal Field[1].SizeMinTangent

(So you cannot even override defaults)

Therefore I conclude that either there is a bug or I else I do not even grasp the basics of Gmsh.

Any reply welcome Thank you in advance