Create a matplotlib projection for stereogram plots

[YagoMCastro]

Stereogram plots, often used in geology and structural geology, help visualize 3D orientation data (e.g., planes, lines, or stress directions) on a 2D plane. Creating a custom Matplotlib projection for stereogram plots allows accurate representation of angular data, which we need to represent directions. Tutorial available here.

[YagoMCastro]

Task List

1. Switch to Matplotlib Projection

   • Implement a projection in Matplotlib to facilitate grid drawing, setting ticks, etc. Refer to the Matplotlib Projections API for guidance.

2. Add Matplotlib as a Dependency

   • Add Matplotlib as a runtime dependency in pyproject.toml.
   • Determine the minimum required version, choosing a minor release from at least two years ago.
   • Consult the Matplotlib changelog to confirm an appropriate version.

3. Set Up Testing with pytest-mpl

   • Add pytest-mpl to the environment.yml file.
   • Also add pytest-mpl to env/requirements-test.txt.