Function LiveryHelper

src/newgrf_engine.cpp:373–387

* Determines the livery of an engine. * * This always uses dual company colours independent of GUI settings. So it is desync-safe. * * @param engine Engine type * @param v Vehicle, nullptr in purchase list. * @return Livery to use */

 * @return Livery to use
 */
static const Livery *LiveryHelper(EngineID engine, const Vehicle *v)
{
	const Livery *l;

	if (v == nullptr) {
		if (!Company::IsValidID(_current_company)) return nullptr;
		l = GetEngineLivery(engine, _current_company, EngineID::Invalid(), nullptr, LIT_ALL);
	} else if (v->IsGroundVehicle()) {
		l = GetEngineLivery(v->engine_type, v->owner, v->GetGroundVehicleCache()->first_engine, v, LIT_ALL);
	} else {
		l = GetEngineLivery(v->engine_type, v->owner, EngineID::Invalid(), v, LIT_ALL);
	}

	return l;
}

/**
 * Helper to get the position of a vehicle within a chain of vehicles.