如何使用 VTK 加载 STL 文件显示 3D 模型？

void loadFileWhitSTL(vtkSmartPointer<vtkRenderer> renderer);
void createText(vtkSmartPointer<vtkRenderer> renderer);
void createAxes(vtkSmartPointer<vtkRenderer> renderer);
void createGround(vtkSmartPointer<vtkRenderer> renderer);



int main(int, char *[])
{
    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);
    vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
    renderWindowInteractor->SetInteractorStyle(style);

    loadFileWhitSTL(renderer);
    createText(renderer);
    createAxes(renderer);
    createGround(renderer);

    renderer->SetBackground(.2, .2, .2);
    renderer->ResetCameraClippingRange();
          
    renderWindow->Render();
    renderWindowInteractor->Initialize();
    renderWindowInteractor->Start();

    return EXIT_SUCCESS;
}

void loadFileWhitSTL(vtkSmartPointer<vtkRenderer> renderer) 
{
    const char *path = R"(D:\Qt\Qmake\VTK\stl\5e1bd9bc2958e.stl)";

    vtkSmartPointer<vtkSTLReader> reader = vtkSmartPointer<vtkSTLReader>::New();
    reader->SetFileName(path);
    reader->Update();

    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(reader->GetOutputPort());

    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    renderer->AddActor(actor);
}

void createText(vtkSmartPointer<vtkRenderer> renderer) 
{
    vtkSmartPointer<vtkVectorText> text = vtkSmartPointer<vtkVectorText>::New();
    text->SetText("20200311");
    text->Update();

    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(text->GetOutputPort());

    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->SetPosition(5.0, 5.0, 30.0);
    actor->SetScale(10.0);
    actor->GetProperty()->SetPointSize(48);
    actor->GetProperty()->SetColor(1.0, 0.0, 0.0);
    renderer->AddActor(actor);
}

void createAxes(vtkSmartPointer<vtkRenderer> renderer)
{
    //轴
    vtkSmartPointer<vtkAxesActor> axes = vtkSmartPointer<vtkAxesActor>::New();
    axes->SetTotalLength(150.0, 100.0, 50.0);
    axes->SetShaftType(vtkAxesActor::CYLINDER_SHAFT);//设置轴类型圆柱形状
    axes->SetCylinderRadius(0.01);
    axes->GetXAxisCaptionActor2D()->SetWidth(0.03);
    axes->GetYAxisCaptionActor2D()->SetWidth(0.03);
    axes->GetZAxisCaptionActor2D()->SetWidth(0.03);

    renderer->AddActor(axes);
}

//底板
void createGround(vtkSmartPointer<vtkRenderer> renderer)
{
    vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New();
    plane->SetXResolution(50);
    plane->SetYResolution(50);
    plane->SetCenter(0, 0, 0);
    plane->SetNormal(0, 0, 1);

    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(plane->GetOutputPort());
    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->SetScale(300.0, 300.0, 1.0);
    actor->GetProperty()->SetRepresentationToWireframe();

    renderer->AddActor(actor);
}

如何使用 VTK 加载 STL 文件显示 3D 模型？

原文：https://www.cnblogs.com/cheungxiongwei/p/12465206.html