C++ Vehicle::GetEngine方法代码示例

//.........这里部分代码省略.........
				if (result.Failed()) {
					/* The train can't be joined to make the same consist as the original.
					 * Sell what we already made (clean up) and return an error.           */
					DoCommand(w_front->tile, w_front->index | 1 << 20, 0, flags, GetCmdSellVeh(w_front));
					DoCommand(w_front->tile, w->index       | 1 << 20, 0, flags, GetCmdSellVeh(w));
					return result; // return error and the message returned from CMD_MOVE_RAIL_VEHICLE
				}
			} else {
				/* this is a front engine or not a train. */
				w_front = w;
				w->service_interval = v->service_interval;
				w->SetServiceIntervalIsCustom(v->ServiceIntervalIsCustom());
				w->SetServiceIntervalIsPercent(v->ServiceIntervalIsPercent());
			}
			w_rear = w; // trains needs to know the last car in the train, so they can add more in next loop
		}
	} while (v->type == VEH_TRAIN && (v = v->GetNextVehicle()) != NULL);

	if ((flags & DC_EXEC) && v_front->type == VEH_TRAIN) {
		/* for trains this needs to be the front engine due to the callback function */
		_new_vehicle_id = w_front->index;
	}

	if (flags & DC_EXEC) {
		/* Cloned vehicles belong to the same group */
		DoCommand(0, v_front->group_id, w_front->index, flags, CMD_ADD_VEHICLE_GROUP);
	}


	/* Take care of refitting. */
	w = w_front;
	v = v_front;

	/* Both building and refitting are influenced by newgrf callbacks, which
	 * makes it impossible to accurately estimate the cloning costs. In
	 * particular, it is possible for engines of the same type to be built with
	 * different numbers of articulated parts, so when refitting we have to
	 * loop over real vehicles first, and then the articulated parts of those
	 * vehicles in a different loop. */
	do {
		do {
			if (flags & DC_EXEC) {
				assert(w != NULL);

				/* Find out what's the best sub type */
				byte subtype = GetBestFittingSubType(v, w, v->cargo_type);
				if (w->cargo_type != v->cargo_type || w->cargo_subtype != subtype) {
					CommandCost cost = DoCommand(0, w->index, v->cargo_type | 1U << 7 | (subtype << 8), flags, GetCmdRefitVeh(v));
					if (cost.Succeeded()) total_cost.AddCost(cost);
				}

				if (w->IsGroundVehicle() && w->HasArticulatedPart()) {
					w = w->GetNextArticulatedPart();
				} else {
					break;
				}
			} else {
				const Engine *e = v->GetEngine();
				CargoID initial_cargo = (e->CanCarryCargo() ? e->GetDefaultCargoType() : (CargoID)CT_INVALID);

				if (v->cargo_type != initial_cargo && initial_cargo != CT_INVALID) {
					bool dummy;
					total_cost.AddCost(GetRefitCost(NULL, v->engine_type, v->cargo_type, v->cargo_subtype, &dummy));
				}
			}

			if (v->IsGroundVehicle() && v->HasArticulatedPart()) {
				v = v->GetNextArticulatedPart();
			} else {
				break;
			}
		} while (v != NULL);

		if ((flags & DC_EXEC) && v->type == VEH_TRAIN) w = w->GetNextVehicle();
	} while (v->type == VEH_TRAIN && (v = v->GetNextVehicle()) != NULL);

	if (flags & DC_EXEC) {
		/*
		 * Set the orders of the vehicle. Cannot do it earlier as we need
		 * the vehicle refitted before doing this, otherwise the moved
		 * cargo types might not match (passenger vs non-passenger)
		 */
		DoCommand(0, w_front->index | (p2 & 1 ? CO_SHARE : CO_COPY) << 30, v_front->index, flags, CMD_CLONE_ORDER);

		/* Now clone the vehicle's name, if it has one. */
		if (v_front->name != NULL) CloneVehicleName(v_front, w_front);
	}

	/* Since we can't estimate the cost of cloning a vehicle accurately we must
	 * check whether the company has enough money manually. */
	if (!CheckCompanyHasMoney(total_cost)) {
		if (flags & DC_EXEC) {
			/* The vehicle has already been bought, so now it must be sold again. */
			DoCommand(w_front->tile, w_front->index | 1 << 20, 0, flags, GetCmdSellVeh(w_front));
		}
		return total_cost;
	}

	return total_cost;
}