Method Unload

src/cargopacket.cpp:626–640

* Unloads cargo at the given station. Deliver or transfer, depending on the * ranges defined by designation_counts. * @param dest StationCargoList to add transferred cargo to. * @param max_move Maximum amount of cargo to move. * @param cargo The cargo type of the cargo. * @param payment Payment object to register payments in. * @param current_tile Current tile the cargo handling is happening

 * @return Amount of cargo actually unloaded.
 */
uint VehicleCargoList::Unload(uint max_move, StationCargoList *dest, CargoType cargo, CargoPayment *payment, TileIndex current_tile)
{
	uint moved = 0;
	if (this->action_counts[MTA_TRANSFER] > 0) {
		uint move = std::min(this->action_counts[MTA_TRANSFER], max_move);
		this->ShiftCargo(CargoTransfer(this, dest, move, current_tile));
		moved += move;
	}
	if (this->action_counts[MTA_TRANSFER] == 0 && this->action_counts[MTA_DELIVER] > 0 && moved < max_move) {
		uint move = std::min(this->action_counts[MTA_DELIVER], max_move - moved);
		this->ShiftCargo(CargoDelivery(this, move, cargo, payment, current_tile));
		moved += move;
	}
	return moved;
}

/**
 * Truncates the cargo in this list to the given amount. It leaves the