[Gmsh] making an equilateral mesh.
Dr Colin J. Cotter
colin.cotter at imperial.ac.uk
Wed Oct 7 11:07:47 CEST 2009
Dear Gmsh list,
I have been trying to make a mesh of equilateral triangles by
extruding a horizontal line at a 60 degree angle (later I will use
periodic boundary conditions so I have an equilateral mesh on the
torus). I have noticed that if you do this then the extrusion divides
the quadrilaterals in the wrong direction and you don't get a Delaunay
mesh (the equilateral one):
Point(1) = {0,0,0,0.1};
Extrude {1,0,0} {
Point{1}; Layers{5};
}
Extrude {0.5,0.866025403784,0} {
Line{1}; Layers{5};
}
but it works if you extrude at a -60 degree angle instead:
Point(1) = {0,0,0,0.1};
Extrude {1,0,0} {
Point{1}; Layers{5};
}
Extrude {-0.5,0.866025403784,0} {
Line{1}; Layers{5};
}
Is there a way to force Gmsh to produce a Delaunay mesh in the first case?
all the best
--cjc