Method IsEngineCountable

src/vehicle.cpp:685–696

* Check if a vehicle is counted in num_engines in each company struct * @return true if the vehicle is counted in num_engines */

 * @return true if the vehicle is counted in num_engines
 */
bool Vehicle::IsEngineCountable() const
{
	switch (this->type) {
		case VEH_AIRCRAFT: return Aircraft::From(this)->IsNormalAircraft(); // don't count plane shadows and helicopter rotors
		case VEH_TRAIN:
			return !this->IsArticulatedPart() && // tenders and other articulated parts
					!Train::From(this)->IsRearDualheaded(); // rear parts of multiheaded engines
		case VEH_ROAD: return RoadVehicle::From(this)->IsFrontEngine();
		case VEH_SHIP: return true;
		default: return false; // Only count company buildable vehicles
	}
}

/**
 * Check whether Vehicle::engine_type has any meaning.