VTK 平面裁剪

有些时候需要显示零件内部情况，所有会对零件显示进行平面裁剪，这里用到了vtkPlane和vtkClipPolyData。

vtkPlane是定义一个平面，vtkClipPolyData使用vtkPlane定义的平面进行裁剪。

下面列出主要的代码，其他Qt框架代码参考前面文章。

QSurfaceFormat::setDefaultFormat(QVTKOpenGLNativeWidget::defaultFormat());

vtkNew<vtkRenderer> renderer;
vtkNew<vtkNamedColors> colors;

//定义球
vtkNew<vtkSphereSource> sphereSource;
sphereSource->SetRadius(10);
sphereSource->SetCenter(0, 0, 0);

//定义平面
vtkNew<vtkPlane> plane;
plane->SetOrigin(3,0,0);
plane->SetNormal(-1, 0, 0);

//定义裁剪
vtkNew<vtkClipPolyData> clipper;
clipper->SetInputConnection(sphereSource->GetOutputPort());
clipper->SetClipFunction(plane);

vtkNew<vtkDataSetMapper> clipMapper;
clipMapper->SetInputConnection(clipper->GetOutputPort());

vtkNew<vtkActor> clipActor;
clipActor->SetMapper(clipMapper);
clipActor->GetProperty()->SetDiffuseColor(colors->GetColor4d("Tomato").GetData());
clipActor->GetProperty()->EdgeVisibilityOn(); //显示线框

renderer->AddActor(clipActor);

renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("RenderWindowNoUIFile");
ui.vtk_main->setRenderWindow(renderWindow);

显示如下：