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authorlassulus <lassulus@lassul.us>2021-05-02 17:37:10 +0200
committermakefu <github@syntax-fehler.de>2021-05-15 13:11:34 +0200
commit714eaee3d0d79cd1b0d9243fc4bea64518b22af4 (patch)
tree2e9431ec35f5ea851144672b0e018a9507fb0c77
parent4f638ddb3da099e02ef8c5444026f0e71e553741 (diff)
realwallpaper: add version with star constellations
-rw-r--r--krebs/5pkgs/simple/realwallpaper/default.nix33
-rw-r--r--krebs/5pkgs/simple/realwallpaper/get_constellations.py36
2 files changed, 68 insertions, 1 deletions
diff --git a/krebs/5pkgs/simple/realwallpaper/default.nix b/krebs/5pkgs/simple/realwallpaper/default.nix
index aafabb7b6..c9b2e76b6 100644
--- a/krebs/5pkgs/simple/realwallpaper/default.nix
+++ b/krebs/5pkgs/simple/realwallpaper/default.nix
@@ -271,6 +271,32 @@ pkgs.writers.writeDashBin "generate-wallpaper" ''
shade=15
''}
+ ${pkgs.writers.writePython3 "get_constellations" {
+ libraries = [ pkgs.python3Packages.astropy ];
+ } ./get_constellations.py} ${pkgs.fetchurl {
+ url = "https://raw.githubusercontent.com/ofrohn/d3-celestial/d2e20e104b86429d90ac8227a5b021262b45d75a/data/constellations.lines.json";
+ sha256 = "0g71fdrnxvxd6pcqvihj2q9iaynrl7px45kzw6qm1kymynz6ckr9";
+ }} > constellations.arcs
+
+ xplanet --num_times 1 --geometry $xplanet_out_size \
+ --output xplanet-krebs-stars-output.png --projection merc \
+ -config ${pkgs.writeText "xplanet-krebs-stars.config" ''
+ [default]
+
+ arc_thickness=1
+ arc_file=constellations.arcs
+
+ [earth]
+ "Earth"
+ map=daymap-final.png
+ night_map=nightmap-final.png
+ cloud_map=clouds.png
+ cloud_threshold=1
+ cloud_gamma=10
+ marker_file=marker_file
+ shade=15
+ ''}
+
# trim xplanet output
if needs_rebuild realwallpaper.png xplanet-output.png; then
convert xplanet-output.png -crop $out_geometry \
@@ -278,7 +304,6 @@ pkgs.writers.writeDashBin "generate-wallpaper" ''
mv realwallpaper-tmp.png realwallpaper.png
fi
- # trim xplanet output
if needs_rebuild realwallpaper-marker.png xplanet-marker-output.png; then
convert xplanet-marker-output.png -crop $out_geometry \
realwallpaper-marker-tmp.png
@@ -292,6 +317,12 @@ pkgs.writers.writeDashBin "generate-wallpaper" ''
mkdir -p archive
convert realwallpaper-krebs.png archive/"$(date -Is)".jpg
fi
+
+ if needs_rebuild realwallpaper-krebs-stars.png xplanet-krebs-stars-output.png; then
+ convert xplanet-krebs-stars-output.png -crop $out_geometry \
+ realwallpaper-krebs-stars-tmp.png
+ mv realwallpaper-krebs-stars-tmp.png realwallpaper-krebs-stars.png
+ fi
}
main "$@"
diff --git a/krebs/5pkgs/simple/realwallpaper/get_constellations.py b/krebs/5pkgs/simple/realwallpaper/get_constellations.py
new file mode 100644
index 000000000..5d8d3df5d
--- /dev/null
+++ b/krebs/5pkgs/simple/realwallpaper/get_constellations.py
@@ -0,0 +1,36 @@
+from astropy.coordinates import SkyCoord, ITRS, representation
+from astropy.time import Time
+import json
+import sys
+
+
+def convert_to_itrs(coord):
+ c = SkyCoord(coord[0], coord[1], unit='degree', frame='icrs')
+ c_itrs = c.transform_to(ITRS(obstime=Time.now()))
+ rep = c_itrs.represent_as(representation.UnitSphericalRepresentation)
+ return [rep.lat.deg, rep.lon.deg]
+
+
+def points_to_lines(points):
+ lines = []
+ for x in range(len(points) - 1):
+ lines.append([points[x], points[x+1]])
+ return lines
+
+
+with open(sys.argv[1]) as f:
+ constellations = json.load(f)['features']
+
+output = []
+
+for const in constellations:
+ for line in const['geometry']['coordinates']:
+ transformed_line = []
+ for point in line:
+ transformed_line.append(convert_to_itrs(point))
+
+ line_combined = points_to_lines(transformed_line)
+ for l in line_combined: # noqa
+ output.append(f'{l[0][0]} {l[0][1]} {l[1][0]} {l[1][1]} # {const["id"]}') # noqa
+
+print('\n'.join(output))