Skip to content


# VRMLImporter

VTKEx/Cxx/IO/VRMLImporter

### Description

This example loads a wrl file and displays it on the screen. An example file is here.

Seealso

VRMLImporterDemo shows how to add additional pipeline elements to imported polydata.

Warning

The vtkVRMLImporter only imports VRML 2.0 files.

Other languages

See (Java)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

### Code

VRMLImporter.cxx

    #include <vtkNamedColors.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkRenderer.h>
    #include <vtkSmartPointer.h>
    #include <vtkVRMLImporter.h>

    int main(int argc, char* argv[])
    {
      if (argc < 2)
      {
        std::cout << "Required arguments: Filename" << std::endl;
        return EXIT_FAILURE;
      }

      std::string filename = argv[1];
      std::cout << "Reading " << filename << std::endl;

      auto colors = vtkSmartPointer<vtkNamedColors>::New();

      auto renderer = vtkSmartPointer<vtkRenderer>::New();
      auto renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);

      auto renderWindowInteractor =
          vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      // VRML Import
      auto importer = vtkSmartPointer<vtkVRMLImporter>::New();
      importer->SetFileName(filename.c_str());
      importer->SetRenderWindow(renderWindow);
      importer->Update();

      auto actors = renderer->GetActors();
      std::cout << "There are " << actors->GetNumberOfItems() << " actors"
                << std::endl;

      renderer->SetBackground(colors->GetColor3d("Burlywood").GetData());
      renderWindow->SetSize(512, 512);
      renderWindow->Render();
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(VRMLImporter)

    find_package(VTK COMPONENTS
      vtkvtkCommonColor
      vtkvtkCommonCore
      vtkvtkIOImport
      vtkvtkInteractionStyle
      vtkvtkRenderingContextOpenGL2
      vtkvtkRenderingCore
      vtkvtkRenderingFreeType
      vtkvtkRenderingGL2PSOpenGL2
      vtkvtkRenderingOpenGL2 QUIET)
    if (NOT VTK_FOUND)
      message("Skipping VRMLImporter: ${VTK_NOT_FOUND_MESSAGE}")
      return ()
    endif()
    message (STATUS "VTK_VERSION: ${VTK_VERSION}")
    if (VTK_VERSION VERSION_LESS "8.90.0")
      # old system
      include(${VTK_USE_FILE})
      add_executable(VRMLImporter MACOSX_BUNDLE VRMLImporter.cxx )
      target_link_libraries(VRMLImporter PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(VRMLImporter MACOSX_BUNDLE VRMLImporter.cxx )
      target_link_libraries(VRMLImporter PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS VRMLImporter
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build VRMLImporter

Click here to download VRMLImporter and its CMakeLists.txt file. Once the tarball VRMLImporter.tar has been downloaded and extracted,

    cd VRMLImporter/build

If VTK is installed:

    cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

    cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

    make

and run it:

    ./VRMLImporter

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.