#include <vtkSmartPointer.h>

#include <vtk3DSImporter.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkActorCollection.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkCamera.h>

#include <vtkNamedColors.h>

int main (int argc, char *argv[])
{
  if (argc < 2)
  {
    std::cout << "Usage: " << argv[0]
              << " file.3ds"
              << std::endl;
    return EXIT_FAILURE;
  }

  vtkSmartPointer<vtk3DSImporter> importer =
    vtkSmartPointer<vtk3DSImporter>::New();
  importer->SetFileName(argv[1]);
  importer->ComputeNormalsOn();

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

  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renWin =
    vtkSmartPointer<vtkRenderWindow>::New();
  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();

  renWin->AddRenderer(renderer);
  renderer->SetBackground2 (colors->GetColor3d("Gold").GetData());
  renderer->SetBackground (colors->GetColor3d("Wheat").GetData());
  renderer->GradientBackgroundOn();

  iren->SetRenderWindow(renWin);
  importer->SetRenderWindow(renWin);
  importer->Update();

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

  renWin->Render();
  vtkSmartPointer<vtkCamera> camera =
    vtkSmartPointer<vtkCamera>::New();
  camera->SetPosition (0, -1, 0);
  camera->SetFocalPoint (0, 0, 0);
  camera->SetViewUp (0, 0, 1);
  camera->Azimuth(150);
  camera->Elevation(30);

  renderer->SetActiveCamera(camera);
  renderer->ResetCamera();
  renderer->ResetCameraClippingRange();

  iren->Start();

  return EXIT_SUCCESS;
}
