# UnstructGrid: Apply Part Settings to a Model

Each part has part settings that can be configured to make a better visual appearance of your data, for instance settings such as visibility, draw style, coloring, highlighting and result visibility.

The demo file (contact.vtfx) contains a geometry with four parts. This example shows how to set the following settings on these parts:

- Part 1: Set invisible
- Part 2: Set color to red
- Part 3: Set draw style surface mesh
- Part 4: Set transparent

    void TutorialRunnerMainWindow::setPartSettings()
    {
        //--------------------------------------------------------------------------
        // Load an UnstructGridModel from file
        // Apply some part settings
        //--------------------------------------------------------------------------

        // Create the model and data source
        cee::PtrRef<cee::ug::UnstructGridModel> ugModel = new cee::ug::UnstructGridModel();
        cee::PtrRef<cee::ug::DataSourceVTFx> source = new cee::ug::DataSourceVTFx(42);

        // Open the VTFx file
        cee::Str vtfxFile = TutorialUtils::testDataDir() + "contact.vtfx";
        if (!source->open(vtfxFile, 0))
        {
            // VTFx file not found
            return;
        }

        // Add the data source to the model
        ugModel->setDataSource(source.get());

        // Set the first state as current
        std::vector<cee::ug::StateInfo> stateInfos = source->directory()->stateInfos();
        int stateId = stateInfos[0].id();
        ugModel->modelSpec().setStateId(stateId);

        // This model contains 4 parts
        // Part 1: Set invisible
        // Part 2: Set color to blue
        // Part 3: Set draw style surface mesh
        // Part 4: Set transparent

        // Get the id for all the parts through the meta data directory
        // Get the corresponding part settings
        // Set the part setting as listed above
        std::vector<cee::ug::PartInfo> partInfos = source->directory()->partInfos(0);
        int firstPartId     = partInfos[0].id();
        int secondPartId    = partInfos[1].id();
        int thirdPartId     = partInfos[2].id();
        int fourthPartId    = partInfos[3].id();

        // Part 1: Set invisible
        ugModel->partSettings(0, firstPartId)->setVisible(false);

        // Part 2: Set color to blue
        ugModel->partSettings(0, secondPartId)->setColor(cee::Color3f(0.0, 0.0, 1.0));

        // Part 3: Set draw style surface mesh
        ugModel->partSettings(0, thirdPartId)->setDrawStyle(cee::ug::PartSettings::SURFACE_MESH);

        // Part 4: Set transparent
        ugModel->partSettings(0, fourthPartId)->setOpacity(0.5f);

        // Add model to view. Ensure that old models are removed first
        cee::vis::View* gcView = getTutorialView();
        gcView->removeAllModels();
        gcView->addModel(ugModel.get());

        ugModel->updateVisualization();

        cee::BoundingBox bb = gcView->boundingBox();
        gcView->camera().fitView(bb, cee::Vec3d(0, 0, -1), cee::Vec3d(0, 1, 0));
        gcView->camera().inputHandler()->setRotationPoint(bb.center());

        gcView->requestRedraw();
    }

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