Spack fenics package is missing mshr

[dokken]

There are plenty of examples across this forum. Consider for instance:

Converting simple 2D mesh from gmsh to dolfin

The code I’ve posted there is for a 3D mesh, however, it generalizes to a 2D mesh. Given this simple geo file // the square Point(1) = {0, 0, 0,0.1}; Point(2) = {0, 1, 0,0.1}; Point(3) = {1, 1, 0,0.1}; Point(4) = {1, 0, 0,0.1}; Line(1) = {1, 4}; Line(2) = {4, 3}; Line(3) = {3, 2}; Line(4) = {2, 1}; // creating the surfaces Line Loop(6) = {2, 3, 4, 1}; Plane Surface(8) = {6}; Physical Surface(2) = {8}; I call gmsh -2 mesh.geo to create the msh file Then using meshio I load the meshio import…

or

Transitioning from mesh.xml to mesh.xdmf, from dolfin-convert to meshio

I disagree with your claim. All the code I have posted above is using msh 4.1. The following illustrates a use case with the latest version of GMSH. Starting from a clean ubuntu 20.04 environment using docker: docker run -ti -v $PWD:/home/shared -w /home/shared --rm ubuntu:20.04 Installation instructions in docker apt-get update -qq apt-get install -y -qq software-properties-common python3-pip libglu1 libxrender1 libcursor1 libxft2 libxinerama1 add-apt-repository -y ppa:fenics-packages/fen…

Gmsh also has a large range of tutorials:

Files · master · gmsh / gmsh · GitLab

or my tutorial using pygmsh
https://jsdokken.com/converted_files/tutorial_pygmsh.html#second