VRMLImporter

VTKExamples/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.

Code

VRMLImporter.cxx

#include <vtkSmartPointer.h>
#include <vtkVRMLImporter.h>

#include <vtkActorCollection.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>

#include <vtkNamedColors.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;

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

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

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

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

  vtkSmartPointer<vtkActorCollection> actors =
    vtkSmartPointer<vtkActorCollection>::New();
  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
  vtkRenderingCore
  vtkRenderingFreeType
  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.