Crystalpy is a Python program which can generate several kinds of periodic crystal mesh geometries for Gmsh:

• 2D or 3D
• rectangular or triangular (hexagonal) crystals

It can also:

• generate 2D SVG representations of those geometries
• define physical points in the meshes

Several types of inclusions can be defined:

• filled or not with a material
• circular, elliptic or rectangular
• inside or outside the host material

Crystalpy supports unit tests with nosetests.

• Define the geometry of your crystal in mesh.py
• Run python mesh.py

• 22. 1: Can generate periodic 2D meshes, with multiple inclusion types
• 22. 1.1: Add support for SVG output and triangular crystals
• 22. 2: Add support for 3D structures
• 22. 2.1: Add support for elliptic inclusions
• 22. 2.2: Add support for rectangular inclusions
• 22. 2.3: Add support for plots
• 22. 2.4: Add unit tests; fix periodicity conditions
• 22. 2.5: Add support for physical points; fix 2D crystal generation
• 22. 2.6: Add support for physical lines; fix 2D image generation
• 22. 2.7: Add usage explanations; fix crystal position