Function main

Examples/Emscripten/Cxx/ConeMultiBackend/ConeMultiBackend.cxx:24–109

//------------------------------------------------------------------------------

int main(int argc, char* argv[])
{
  // Create a renderer, render window, and interactor
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetMultiSamples(0);
  renderWindow->AddRenderer(renderer);

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

  vtkNew<vtkInteractorStyleTrackballCamera> style;
  renderWindowInteractor->SetInteractorStyle(style);
  style->SetDefaultRenderer(renderer);

  vtkNew<vtkMinimalStandardRandomSequence> seq;

  double spacingX = 2.0, spacingY = 2.0, spacingZ = 2.0;
  int nx, ny, nz, mapperIsStatic;
  VTK_FROM_CHARS_IF_ERROR_RETURN(argv[1], nx, EXIT_FAILURE);
  VTK_FROM_CHARS_IF_ERROR_RETURN(argv[2], ny, EXIT_FAILURE);
  VTK_FROM_CHARS_IF_ERROR_RETURN(argv[3], nz, EXIT_FAILURE);
  VTK_FROM_CHARS_IF_ERROR_RETURN(argv[4], mapperIsStatic, EXIT_FAILURE);

  double x = 0.0, y = 0.0, z = 0.0;
  for (int k = 0; k < nz; ++k)
  {
    for (int j = 0; j < ny; ++j)
    {
      for (int i = 0; i < nx; ++i)
      {
        vtkNew<vtkConeSource> coneSrc;
        coneSrc->SetResolution(10);
        // position the cone
        coneSrc->SetCenter(x, y, z);

        coneSrc->Update();
        vtkPolyData* cone = coneSrc->GetOutput();

        // generate random colors for each face of the cone.
        vtkNew<vtkUnsignedCharArray> colors;
        colors->SetNumberOfComponents(4);
        seq->SetSeed(k * ny * nx + j * nx + i);
        for (vtkIdType cellId = 0; cellId < cone->GetNumberOfPolys(); ++cellId)
        {
          double red = seq->GetNextRangeValue(0, 255.);
          double green = seq->GetNextRangeValue(0, 255.);
          double blue = seq->GetNextRangeValue(0, 255.);
          colors->InsertNextTuple4(red, green, blue, 255);
        }
        cone->GetCellData()->SetScalars(colors);

        vtkNew<vtkPolyDataMapper> mapper;
        mapper->SetInputData(cone);
        mapper->Update();
        mapper->SetStatic(mapperIsStatic);

        vtkNew<vtkActor> actor;