airliner mesh is generated in-repo: tools/plane_gen.py writes vendor/plane3d.js (480 tris, CC0, same unit extent as the old Grab3D derivative); attribution updated

README.md

@@ -23,7 +23,8 @@ dropped into an iframe or kiosk browser and left running.
 - **Realistic night sky**: ~8700 stars from the Yale Bright Star Catalogue
   (points sized by magnitude, coloured by temperature), rotated at the sidereal
   rate for the site's latitude, a Milky Way band and a phase-correct moon.
-- **Aircraft**: low-poly jets (CC0 model) on curved routes between real
+- **Aircraft**: low-poly jets (own CC0 mesh, generated by `tools/plane_gen.py`)
+  on curved routes between real
   airfields, with a destination rolled at every take-off, sun-lit silhouettes
   and contrails by day, strobing position lights by night.
 - **Night lights**: vehicle lights moving along the real road network (Overpass)
@@ -237,6 +238,8 @@ window.TRANSLATIONS['Sunrise']['xx'] = 'MyTranslation';
 ├── ash.css                  default colour theme
 ├── gruvbox.css              alternative colour theme
 ├── nord.css                 alternative colour theme
+├── tools/
+│   └── plane_gen.py         generates vendor/plane3d.js (the airliner mesh)
 ├── vendor/
 │   ├── clouds3d.js          WebGL scene renderer (sky, clouds, terrain, lights)
 │   ├── suncalc.js           sun/moon positions - ISC (SunCalc by mourner)
@@ -255,7 +258,8 @@ window.TRANSLATIONS['Sunrise']['xx'] = 'MyTranslation';
 
 - **Background application code**: MIT (see `LICENSE`)
 - **SunCalc** (vendored): ISC - <https://github.com/mourner/suncalc>
-- **Aircraft model** (`vendor/plane3d.js`): CC0
+- **Aircraft model** (`vendor/plane3d.js`): own geometry, generated by
+  `tools/plane_gen.py`, CC0
 - **Open-Meteo** (weather API): CC BY 4.0 - <https://open-meteo.com/>
 - **ESRI** basemaps (`World_Imagery`, `World_Street_Map`) served through the
   bundled proxy: Esri, its licensors and contributors -