Function GetVehicleCallback

src/newgrf_engine.cpp:1198–1202

* Evaluate a newgrf callback for vehicles * @param callback The callback to evaluate * @param param1 First parameter of the callback * @param param2 Second parameter of the callback * @param engine Engine type of the vehicle to evaluate the callback for * @param v The vehicle to evaluate the callback for, or nullptr if it doesn't exist yet * @param[out] regs100 Additional result

 * @return The value the callback returned, or CALLBACK_FAILED if it failed
 */
uint16_t GetVehicleCallback(CallbackID callback, uint32_t param1, uint32_t param2, EngineID engine, const Vehicle *v, std::span<int32_t> regs100)
{
	VehicleResolverObject object(engine, v, VehicleResolverObject::WO_UNCACHED, false, callback, param1, param2);
	return object.ResolveCallback(regs100);
}

/**
 * Evaluate a newgrf callback for vehicles with a different vehicle for parent scope.