Description:

Since the barycentric interpolation routines are used by more than one model_mod, this pull request extracts the subroutines into a separate barycentric_utilities_mod.f90.

Fixes issue

Fixes issue #764 Feature request: Barycentric interpolation module.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Documentation changes needed?

Not yet. Documentation changes will be written when the actual model mods are changed.

Tests

I removed the five subroutines stored in the aether_cube_sphere model_mod.f90 and instead imported them from the utilities module:

use barycentric_utils_mod, only: inside_triangle, get_3d_weights, get_barycentric_weights, &
                                 latlon_to_xyz, barycentric_average

I reran quickbuild.sh and everything compiled. After that, I ran model_mod_check and all of the checks passed.

Checklist for merging

Note well: I can edit the changelog and conf.py once the pull request has been reviewed. However, I haven't done so at this time because on past pull requests, the code took long enough to merge that my edits to the changelog and conf.py became obsolete.

• Updated changelog entry
• Documentation updated
• Update conf.py

Checklist for release

• Merge into main
• Create release from the main branch with appropriate tag
• Delete feature-branch

Testing Datasets

• Dataset download instructions included

Instructions for downloading the testing datasets, and the model_mod.f90 used to test this pull request are available on the aether_cube_sphere branch.