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VRMLImporter

vtk-examples/Cxx/IO/VRMLImporter


Description

This example loads a wrl file and displays it on the screen. An example file to use is src/Testing/Data/sextant.wrl.

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 question about this example, please use the VTK Discourse Forum

Code

VRMLImporter.cxx

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

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

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

  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  renderWindow->SetWindowName("VRMLImporter");

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // VRML Import
  vtkNew<vtkVRMLImporter> importer;
  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 
  vtkCommonColor
  vtkCommonCore
  vtkIOImport
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  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.