Function GetNewEngineID

src/newgrf.cpp:296–307

* Return the ID of a new engine * @param file The NewGRF file providing the engine. * @param type The Vehicle type. * @param internal_id NewGRF-internal ID of the engine. * @return The new EngineID. * @note depending on the dynamic_engine setting and a possible override * property the grfID may be unique or overwriting or partially re-defining * properties of an existing engine.

 *       properties of an existing engine.
 */
EngineID GetNewEngineID(const GRFFile *file, VehicleType type, uint16_t internal_id)
{
	uint32_t scope_grfid = INVALID_GRFID; // If not using dynamic_engines, all newgrfs share their ID range
	if (_settings_game.vehicle.dynamic_engines) {
		scope_grfid = file->grfid;
		if (auto it = _grf_id_overrides.find(file->grfid); it != std::end(_grf_id_overrides)) {
			scope_grfid = it->second;
		}
	}

	return _engine_mngr.GetID(type, internal_id, scope_grfid);
}