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Python module for generating dual meshes

Project description

DualMesh Build Status

Python module for generating dual meshes.


  • meshio >= 4.0
  • numpy >= 1.16.3


Either install using pip

pip install dualmesh

or copy the file from the dualmesh directory in this repository.


We can go through the example of using module.

First, we import all the needed modules

# For opening a mesh file
import meshio
# For generating a dual mesh
import dualmesh as dm
# For plotting both the mesh and dual mesh
import matplotlib.pyplot as plt

We load the mesh for which we want a dual mesh

msh ="example.msh")

We get the dual mesh object using

dual_msh = dm.get_dual(msh, order=True)

We use matplotlib to plot the original mesh

fig, ax = plt.subplots()
ax.triplot(msh.points[:, 0], msh.points[:, 1], msh.cells["triangle"])

We loop over the polygons (cells) in the dual mesh and we plot them

for cell in dual_msh.cells["polygon"]:
    # We get the coordinates of the current polygon.
    # We repeat one of the points, so that when plotted, we get a complete polygon
    cell_points = dual_msh.points[cell + [cell[0]]]

    # We plot the points of the current polygon
    ax.plot(cell_points[:, 0], cell_points[:, 1], ":", color="black")

And finally we add the legend and save the resulting figure

# We add a legend to the figure
fig.legend([ax.lines[0], ax.lines[-1]], ["Mesh", "Dual mesh"])
# We save the resulting figure

Mesh and dual mesh

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Files for dualmesh, version 0.14.0
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