Feeds carry many airport ground vehicles (type ZVEH) and ground stations
(GRND) that were drawn as the generic plane, some at the 10 km airborne
default.
- types.json gains aircraft_callsign rules: a ZVEH callsign starting FIRE is
a fire truck, PUSH/TUG a pushback tug, DEICER/SQUID/SQB a van, else a car.
GRND draws a new 11.8 m radio mast (other/radio_mast.glb).
- resolveAircraft and aircraftModelSpec take the callsign; a matched rule
names the model outright, ahead of the type's class model.
- The layer spec cache keys such types by the rule matched, so it holds at
most one entry per rule.
- These models (catalog category `other`) draw at their built size, as such
models already do, and a
contact with no altitude whose model is one now stands on the ground; the
feed's own type is kept for such contacts, as no airframe lookup knows it.
- Local ADS-B passes the callsign too.
121 GLBs under public/models/fleet (about 2 MB, MIT like the code) with
catalog.json and types.json. src/data/fleetModels.js picks a model by ICAO
type, aircraft class, emitter category, AIS ship type and size, GTFS route
type, transit mode or rail category, and sizes it life size; the set loads
once, up front. Trail anchors are measured from the meshes.
Sameh Khamis