Minimal VTFx File

This is the most basic example of a VTFx.

The minimum requirements for a VTFx file are:

• one database with

  • one node block

  • one element block, referencing the node block

  • one geometry block, referencing the element block

  • one state info block

• one case with a reference to the database

This example shows how to create such a minimal VTFx file with a simple part consisting of just one hexahedron element. The VTFx file has only one state, no results of any kind nor any properties.

    //--------------------------------------------------------------------------
    // Create the VTFx file
    // -------------------------------------------------------------------------
    cee::PtrRef<cee::vtfx::File> file = new cee::vtfx::File;

    // Create VTFx file settings struct
    cee::vtfx::FileSettings fileSettings;
    fileSettings.applicationName = "VTFx: VTFxMinimal";
    fileSettings.vendorName = "My Company AS";

    // Let the API create the VTFx file 
    const cee::Str fileName = "ExampleMinimal.vtfx";
    if (!file->create(fileName, fileSettings))
    {
        return EXIT_FAILURE;
    }

    // Create a single database (could have many)
    cee::PtrRef<cee::vtfx::Database> database = new cee::vtfx::Database(file.get(), "Only Database", 1, cee::vtfx::Database::SIMULATION_TYPE_STRUCTURAL, cee::vtfx::Database::SOLUTION_TYPE_TRANSIENT, "Database description"); // database id 1

    // Create a single case (could have many)
    cee::PtrRef<cee::vtfx::Case> singleCase = new cee::vtfx::Case(file.get(), "Only Case", 1, 1); // case id 1 using database with id 1

    //--------------------------------------------------------------------------
    // Add nodes
    // -------------------------------------------------------------------------

    // Create the node block
    cee::PtrRef<cee::vtfx::NodeBlock> nodeBlock = new cee::vtfx::NodeBlock(1, false); // node block id 1, not using node ids

    // Set the node data (Note: The VTFx component expects interleaved node coordinates (xyzxyzxyz...))
    const float NODES_PART[] =
    {
        0.0f, 0.0f, 0.0f,
        1.0f, 0.0f, 0.0f,
        1.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 1.0f,
        0.0f, 1.0f, 1.0f
    };

    std::vector<float> nodesPart(NODES_PART, NODES_PART + sizeof(NODES_PART) / sizeof(NODES_PART[0]));
    if (!nodeBlock->setNodes(nodesPart))
    {
        return EXIT_FAILURE;
    }

    // Write the block
    if (!database->writeBlock(nodeBlock.get()))
    {
        return EXIT_FAILURE;
    }


    //--------------------------------------------------------------------------
    // Add elements
    // -------------------------------------------------------------------------

    // Create the element block
    cee::PtrRef<cee::vtfx::ElementBlock> elementBlock = new cee::vtfx::ElementBlock(1, false, false); // element block id 1, not using element ids, referring nodes by index
    elementBlock->setNodeBlockId(1); // Use node block with id = 1

    // Set the element data
    const int CONNECTS_PART[] =
    {
        0, 1, 2, 3, 4, 5, 6, 7
    };

    std::vector<int> elementNodes(CONNECTS_PART, CONNECTS_PART + sizeof(CONNECTS_PART) / sizeof(CONNECTS_PART[0]));
    if (!elementBlock->addElements(cee::vtfx::ElementBlock::HEXAHEDRONS, elementNodes))
    {
        return EXIT_FAILURE;
    }

    // Write the element block
    if (!database->writeBlock(elementBlock.get()))
    {
        return EXIT_FAILURE;
    }

    
    //--------------------------------------------------------------------------
    // Add geometry
    // -------------------------------------------------------------------------

    // Create geometry block
    cee::PtrRef<cee::vtfx::GeometryBlock> geoBlock = new cee::vtfx::GeometryBlock(1); // Only one geometry per state

    size_t geoIndex = 0;
    int partId = 1;

    // Set to use element block with id 1
    if (!geoBlock->addElementBlock(geoIndex, 1, partId)) // Element block with id = 1
    {
        return EXIT_FAILURE;
    }

    // Write the geometry block
    if (!database->writeBlock(geoBlock.get()))
    {
        return EXIT_FAILURE;
    }

    // Create geometry info block
    cee::PtrRef<cee::vtfx::GeometryInfoBlock> infoBlock = new cee::vtfx::GeometryInfoBlock(1); // Only one geometry per state
    infoBlock->addPartInfo(geoIndex, partId, cee::Str("Only part"));

    // Write the geometry info block
    if (!database->writeBlock(infoBlock.get()))
    {
        return EXIT_FAILURE;
    }


    //--------------------------------------------------------------------------
    // Add one state
    // -------------------------------------------------------------------------

    // Create state info block
    cee::PtrRef<cee::vtfx::StateInfoBlock> stepInfo = new cee::vtfx::StateInfoBlock;
    if (!stepInfo->addStateInfo(1, "Only step", 42.0f, cee::vtfx::StateInfoBlock::TIME))
    {
        return EXIT_FAILURE;
    }

    // Write the state info block
    if (!database->writeBlock(stepInfo.get()))
    {
        return EXIT_FAILURE;
    }

    // Finally close the file
    if (!file->close())
    {
        return EXIT_FAILURE;
    }
    
    std::cout << "Exported successfully to file: " << fileName.toStdString() << std::endl;
    std::cout << std::endl << "Press enter to exit..." << std::endl;
    std::cin.ignore();

    return EXIT_SUCCESS;