feat(flights): aircraft draw life-size fleet models chosen by type

Flights, Military Flights and Local ADS-B draw each aircraft with the fleet
model its ICAO type, class or emitter category selects, scaled to the type's
length, built from the up-front loaded bytes. The eight third-party aircraft
models and their attribution are removed; every shipped model is now the
project's own.

public/models/README.md

@@ -1,20 +1,33 @@
-# Bundled 3D Model Attribution
+# Bundled 3D Models
 
-The model files in this directory are third-party visual assets. They are not
-covered by the repository's MIT source-code license; each remains available
-under the license listed below.
+Every 3D model shipped in this directory is one of the project's procedural
+fleet models under [`fleet/`](fleet/): aircraft, helicopters, ships, buoys,
+transit and rail vehicles, and a few other airborne and ground objects. They
+are generated from code by the project maintainers, contain no third-party
+artwork, and are covered by the repository's [MIT license](../../LICENSE)
+like the source code.
 
-| File | Original work and creator | Source | License | Project modifications |
-|---|---|---|---|---|
-| `airplane.glb` | “boeing 747” by [zairiq-123](https://sketchfab.com/zairiq-123) | [Sketchfab model](https://sketchfab.com/3d-models/boeing-747-9b16672038ba48f98e6d80a159044ed9) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Substantially modified and optimized for God's Eye View, including geometry/material simplification and coordinate/orientation preparation. The former 24× runtime calibration is baked into the mesh; location, rotation, and scale are applied; the bounding-box centre is at the origin; and the model uses glTF +Y-up with its nose toward local −X. Geometry remains uncompressed so the aircraft asset does not compete with photogrammetry for Draco worker capacity. |
-| `jet.glb` | “Private Jet” by [Nick the Name](https://sketchfab.com/Nick_The_Name) | [Sketchfab model](https://sketchfab.com/3d-models/private-jet-cbdd1de6ced9461e950eafaa302cc82b) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Repackaged as a glTF binary for the project's military-flight visualization. Imported hierarchy transforms are baked into the meshes; location, rotation, and scale are applied; the bounding-box centre is at the origin; and the model uses meter scale, glTF +Y-up, and the shared nose −X convention. Existing materials are preserved. |
-| `bell206.glb` | “Bell 206 JetRanger” by [terran4627](https://sketchfab.com/terran4627) | [Sketchfab model](https://sketchfab.com/3d-models/bell-206-jetranger-d2f7ba1d671549d4b26aaf834139a1dd) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures resized to 256 px WebP, orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
-| `c172.glb` | “Cessna 172” by [e737](https://sketchfab.com/e0057537) | [Sketchfab model](https://sketchfab.com/3d-models/cessna-172-64cddaee5aff470682659a8c08525046) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures resized to 256 px WebP, orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
-| `citation2.glb` | “1990 Cessna Citation, Texture Detailed, Exterior” by [BlenderCommunityHead](https://sketchfab.com/aboodgoudagad) | [Sketchfab model](https://sketchfab.com/3d-models/1990-cessna-citation-texture-detailed-exterior-a78839624fe64900a8352cb23462350a) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures resized to 256 px WebP, orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
-| `mq9.glb` | “MQ-9” by [IProZenoN](https://sketchfab.com/IProZenoN) | [Sketchfab model](https://sketchfab.com/3d-models/mq-9-fabe963feb354c5584b51f9c470c3f7e) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures resized to 256 px WebP, orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
-| `b789.glb` | “Boeing 787-9” by [Nobilis 2](https://sketchfab.com/nobilishornet2) | [Sketchfab model](https://sketchfab.com/3d-models/boeing-787-9-b6711e2e698e4e469675c1154a50b7a3) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures resized to 256 px WebP, orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
-| `atr72.glb` | “ATR 72 - 600” by [Oyan3D](https://sketchfab.com/oyan3D) | [Sketchfab model](https://sketchfab.com/3d-models/atr-72-600-1e1a7186f7444d288675262fcee44744) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | Optimized for God's Eye View: geometry/material simplification, textures removed with dominant material colors baked into PBR factors (flat “abstracted” style), orientation/scale vertex-baked to real-world meters (Y-up, nose −X), origin centered. |
+| Path | What it holds |
+|---|---|
+| `fleet/catalog.json` | Every model by name: its file, category, built length, beam and bounds (metres, glTF axes, Z up, nose toward −X), the clearance below its origin, and its 2D icon class. |
+| `fleet/types.json` | Which model draws which vehicle, and at what length: ICAO aircraft and helicopter type codes, ADS-B emitter categories, AIS ship-type and length ranges, GTFS route types, transit modes and rail categories, with the defaults. |
+| `fleet/aircraft/`, `fleet/helicopters/`, `fleet/ships/`, `fleet/buoys/`, `fleet/transit/`, `fleet/other/` | The models, one GLB each (EXT_meshopt_compression and KHR_mesh_quantization, vertex colours, no textures). |
 
-CC BY 4.0 permits sharing and adaptation, including commercial use, provided
-appropriate credit is retained, the license is linked, and modifications are
-identified. These credits do not imply endorsement by the original creators.
+How the layers use them:
+
+- Each layer draws a vehicle with the model its type selects, scaled to the
+  type's published length (a vessel to its reported AIS length and beam), so
+  every model is drawn life size. Ground objects, balloons and obstacles in
+  the `other` category are drawn at the size they are built.
+- An aircraft model's origin is its axis; it stands that model's scaled
+  clearance above the ground. A ship's origin is its waterline, and a transit
+  or rail vehicle's the road or rail top (a monorail or gondola is raised by
+  its `transit.elevation` entry).
+- Transit and rail models carry a `_TINT` vertex attribute that marks where
+  the route or category colour is painted.
+- The whole set loads once, up front, when a layer that draws it starts; no
+  model is fetched while a session runs.
+
+`src/data/fleetModels.js` reads the set and chooses each vehicle's model;
+`src/data/fleetModels.test.mjs` checks that every model `types.json` names is
+in the catalog and on disk, and that no GLB exceeds 3 MB.