[GRASS-git] [OSGeo/grass-addons] c5acec: r.windfetch: add compass directions, fixes (#1476)

[Anna Petrasova]

  Branch: refs/heads/grass8
  Home:   https://github.com/OSGeo/grass-addons
  Commit: c5acecd432fb42dde00faf0618817896bb6e8f48
      https://github.com/OSGeo/grass-addons/commit/c5acecd432fb42dde00faf0618817896bb6e8f48
  Author: Anna Petrasova <kratochanna at gmail.com>
  Date:   2025-09-09 (Tue, 09 Sep 2025)

  Changed paths:
    M src/raster/r.windfetch/r.windfetch.py
    M src/raster/r.windfetch/testsuite/test_r_windfetch.py

  Log Message:
  -----------
  r.windfetch: add compass directions, fixes (#1476)

* Added -c flag to return the directions clockwise from N (useful for wind roses), tests added
* Fix minor directions - previously certain combinations of step and minor_step resulted in error, now the step for r.horizon is computed correctly. This should not influence previous results. I added tests.
* Currently underlying tool r.horizon returns 0 distance when no horizon is found (e.g. no land along the direction). This doesn't work well for this tool, so this PR is adding internally a one-cell boundary to the input raster to ensure distance is always returned. This potentially changes (corrects) the results depending on the specific position of land and the coordinate.
* Added documentation for compass flag, add note about points falling on water vs land.



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