Missing boundary cells?

[cghernandez]

I've recently started using dmsh to generate some simple grids, and after some testing I've noticed that some cells are missing close or at the boundary, even using primitive classes. Is this an expected behavior?

Python script:

import dmsh
import optimesh
import numpy as np

c1 = dmsh.Circle([0.0,0.0],1.0)

X, cells = dmsh.generate(c1,0.1,tol=1.0e-10)

X, cells = optimesh.cvt.quasi_newton_uniform_full(X, cells, 1.0e-10,200)

np.savetxt("nodeCoords.txt", X, delimiter=" ")
np.savetxt("cellIndices.txt", cells, fmt='%i', delimiter=" ")

with open("toplot.txt","w") as toplotFile:
    for cell in range(len(cells)):

        for i in range(3):
            node = cells[cell][i]
            nodeX = X[node][0]
            nodeY = X[node][1]

            toplotFile.write(str(nodeX)+" "+str(nodeY)+"\n")

        toplotFile.write("\n")

gnuplot script:

set size ratio -1
p "toplot.txt" w l

Thank you very much.

[cghernandez]

This was related to the way gnuplot draws the domain, no cells were missing.