135 lines
4.8 KiB
Python
135 lines
4.8 KiB
Python
#!/usr/bin/env python3
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"""Gera constellations.js com os signos zodiacais em coordenadas J2000.
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Os traçados são da cultura ``modern`` do Stellarium. As coordenadas J2000
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dos respectivos identificadores Hipparcos vêm do d3-celestial. Os dados são
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compactados para uso offline pelo wallpaper.
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"""
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import json
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import urllib.request
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from pathlib import Path
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STELLARIUM_URL = (
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"https://raw.githubusercontent.com/Stellarium/stellarium/master/"
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"skycultures/modern/index.json"
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)
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D3_BASE = "https://raw.githubusercontent.com/ofrohn/d3-celestial/master/data/"
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OUT = Path(__file__).resolve().parent.parent / "plugin/contents/ui/constellations.js"
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ZODIAC = {
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"Ari": "Áries",
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"Tau": "Touro",
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"Gem": "Gêmeos",
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"Cnc": "Câncer",
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"Leo": "Leão",
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"Vir": "Virgem",
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"Lib": "Libra",
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"Sco": "Escorpião",
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"Sgr": "Sagitário",
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"Cap": "Capricórnio",
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"Aqr": "Aquário",
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"Psc": "Peixes",
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}
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LICENSE = """Constellation lines: Stellarium Modern sky culture, CC BY-SA 4.0.
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https://github.com/Stellarium/stellarium/tree/master/skycultures/modern
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Hipparcos J2000 coordinates: d3-celestial.
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Copyright (c) 2015, Olaf Frohn
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor contributors may be used to
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endorse or promote products derived from this software without permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE.
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"""
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def fetch(url: str) -> dict:
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req = urllib.request.Request(url, headers={"User-Agent": "skeledance-build/1.0"})
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return json.loads(urllib.request.urlopen(req, timeout=30).read())
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def rounded_point(point: list[float]) -> list[float]:
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return [round(float(point[0]), 4), round(float(point[1]), 4)]
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def main() -> None:
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sky_culture = fetch(STELLARIUM_URL)
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star_data = fetch(D3_BASE + "stars.8.json")["features"]
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name_data = fetch(D3_BASE + "constellations.json")["features"]
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stars = {
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int(feature["id"]): rounded_point(feature["geometry"]["coordinates"])
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for feature in star_data
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}
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metadata = {
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feature["id"]: {
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"name": feature["properties"].get("name", feature["id"]),
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"label": rounded_point(feature["geometry"]["coordinates"]),
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}
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for feature in name_data
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}
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merged: dict[str, dict] = {}
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for constellation in sky_culture["constellations"]:
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ident = constellation["id"].split()[-1]
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if ident not in ZODIAC:
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continue
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lines = []
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for hip_line in constellation.get("lines", []):
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missing = [hip for hip in hip_line if hip not in stars]
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if missing:
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raise RuntimeError(f"{ident}: HIP ausente no catálogo: {missing}")
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lines.append([stars[hip] for hip in hip_line])
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image = constellation.get("image")
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art = None
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if image:
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anchors = []
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for anchor in image["anchors"]:
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hip = int(anchor["hip"])
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if hip not in stars:
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raise RuntimeError(f"{ident}: âncora HIP ausente: {hip}")
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anchors.append({"pos": anchor["pos"], "sky": stars[hip]})
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art = {
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"file": "constellation-art/" + Path(image["file"]).name,
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"size": image["size"],
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"anchors": anchors,
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}
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merged[ident] = {
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"id": ident,
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"name": ZODIAC[ident],
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"rank": 1 if ident in {"Ari", "Tau", "Gem", "Leo", "Vir", "Sco", "Sgr"} else 2,
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"label": metadata.get(ident, {}).get("label"),
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"lines": lines,
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"art": art,
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}
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payload = json.dumps(
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[merged[ident] for ident in ZODIAC],
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ensure_ascii=False,
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separators=(",", ":"),
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)
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OUT.write_text(
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"/* Gerado por tools/build_constellations.py.\n"
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" Stellarium Modern constellation lines, coordenadas Hipparcos J2000.\n\n"
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+ "\n".join((" " + line) if line else "" for line in LICENSE.rstrip().splitlines())
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+ " */\nconst CONSTELLATIONS=" + payload + ";\n",
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encoding="utf-8",
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)
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print(f"{len(merged)} signos -> {OUT} ({OUT.stat().st_size / 1024:.0f} KB)")
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if __name__ == "__main__":
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main()
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