VTK Reader Cube

サンプルコード

int main()
{
    std::array<std::array<double, 3>, 8> pts =
    {
        {{{0, 0, 0}},
        {{1, 0, 0}},
        {{1, 1, 0}},
        {{0, 1, 0}},
        {{0, 0, 1}},
        {{1, 0, 1}},
        {{1, 1, 1}},
        {{0, 1, 1}}}
    };

    std::array<std::array<vtkIdType, 4>, 6> ordering = { {{{0, 1, 2, 3}},
                                                     {{4, 5, 6, 7}},
                                                     {{0, 1, 5, 4}},
                                                     {{1, 2, 6, 5}},
                                                     {{2, 3, 7, 6}},
                                                     {{3, 0, 4, 7}}} };
    vtkNew<vtkPolyData> cube;
    vtkNew<vtkPoints> points;
    vtkNew<vtkCellArray> polys;
    vtkNew<vtkFloatArray> scalars;

    for (auto i = 0; i < pts.size(); ++i)
    {
        points->InsertPoint(i, pts[i].data());
        scalars->InsertTuple1(i, i);
    }

    for (auto&& i : ordering)
    {
        polys->InsertNextCell(vtkIdType(i.size()), i.data());
    }


    cube->SetPoints(points);
    cube->SetPolys(polys);
    cube->GetPointData()->SetScalars(scalars);

    vtkNew<vtkPolyDataMapper> cubeMapper;
    cubeMapper->SetInputData(cube);
    cubeMapper->SetScalarRange(cube->GetScalarRange());
    vtkNew<vtkActor> cubeActor;
    cubeActor->SetMapper(cubeMapper);


    // The usual rendering stuff.
    vtkNew<vtkCamera> camera;
    camera->SetPosition(1, 1, 1);
    camera->SetFocalPoint(0, 0, 0);

    
    vtkNew<vtkRenderWindow> renWin;
    vtkNew<vtkRenderWindowInteractor> iren;
    iren->SetRenderWindow(renWin);


    vtkNew<vtkRenderer> renderer;
    renderer->AddActor(cubeActor);

    renWin->SetSize(500, 600);
    renWin->AddRenderer(renderer);

    renWin->Render();
    iren->Start();
    return EXIT_SUCCESS;
}