Function setTrackTypeTabs

src/OpenLoco/src/Ui/Windows/BuildVehicle.cpp:1722–1786

0x4C2D8A

    // 0x4C2D8A
    static void setTrackTypeTabs(Ui::Window* window)
    {
        VehicleType currentTransportTabType = _transportTypeTabInformation[window->currentTab].type;
        generateBuildableVehiclesArray(currentTransportTabType, 0xFF, nullptr);

        auto railTrackTypes = 0;
        auto roadTrackTypes = 0;
        for (auto i = 0; i < _numAvailableVehicles; i++)
        {
            auto vehicleObj = ObjectManager::get<VehicleObject>(_availableVehicles[i]);
            if (vehicleObj && vehicleObj->mode == TransportMode::rail)
            {
                railTrackTypes |= (1 << vehicleObj->trackType);
            }
            else if (vehicleObj && vehicleObj->mode == TransportMode::road)
            {
                auto trackType = vehicleObj->trackType;
                if (trackType == 0xFF)
                {
                    trackType = getGameState().lastTrackTypeOption;
                }
                roadTrackTypes |= (1 << trackType);
            }
            else
            {
                // Reset the tabs
                _trackTypesForTab[0] = 0xFF;
                _numTrackTypeTabs = 1;
                window->widgets[tab_track_type_0].hidden = false;
                for (WidgetIndex_t j = tab_track_type_1; j <= tab_track_type_7; ++j)
                {
                    window->widgets[j].hidden = true;
                }
                return;
            }
        }

        WidgetIndex_t trackTypeTab = tab_track_type_0;
        auto trackType = 0;
        for (trackType = Numerics::bitScanForward(railTrackTypes); trackType != -1 && trackTypeTab <= tab_track_type_7; trackType = Numerics::bitScanForward(railTrackTypes))
        {
            railTrackTypes &= ~(1 << trackType);
            window->widgets[trackTypeTab].hidden = false;
            _trackTypesForTab[widxToTrackTypeTab(trackTypeTab)] = trackType;
            trackTypeTab++;
        }

        if (trackType == -1 && trackTypeTab <= tab_track_type_7)
        {
            for (trackType = Numerics::bitScanForward(roadTrackTypes); trackType != -1 && trackTypeTab <= tab_track_type_7; trackType = Numerics::bitScanForward(roadTrackTypes))
            {
                roadTrackTypes &= ~(1 << trackType);
                window->widgets[trackTypeTab].hidden = false;
                _trackTypesForTab[widxToTrackTypeTab(trackTypeTab)] = trackType | (1 << 7);
                trackTypeTab++;
            }
        }