VTK系列55_VTK对几何体连通区域分析

#include <>

VTK_MODULE_INIT(vtkRenderingOpenGL2);

VTK_MODULE_INIT(vtkRenderingFreeType);

VTK_MODULE_INIT(vtkInteractionStyle);

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int main(int, char *[])

{

vtkSmartPointer<vtkSphereSource> sphereSource =

vtkSmartPointer<vtkSphereSource>::New();

sphereSource->SetRadius(10);

sphereSource->SetThetaResolution(10);

sphereSource->SetPhiResolution(10);

sphereSource->Update();

vtkSmartPointer<vtkConeSource> coneSource =

vtkSmartPointer<vtkConeSource>::New();

coneSource->SetRadius(5);

coneSource->SetHeight(10);

coneSource->SetCenter(25,0,0);

coneSource->Update();

vtkSmartPointer<vtkAppendPolyData> appendFilter =

vtkSmartPointer<vtkAppendPolyData>::New();

appendFilter->AddInputData(sphereSource->GetOutput());

appendFilter->AddInputData(coneSource->GetOutput());

appendFilter->Update();

vtkSmartPointer<vtkPolyDataConnectivityFilter> connectivityFilter =

vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();

connectivityFilter->SetInputData(appendFilter->GetOutput());

connectivityFilter->SetExtractionModeToCellSeededRegions();

connectivityFilter->AddSeed(100);

connectivityFilter->Update();

vtkSmartPointer<vtkPolyDataMapper> originalMapper =

vtkSmartPointer<vtkPolyDataMapper>::New();

originalMapper->SetInputConnection(appendFilter->GetOutputPort());

originalMapper->Update();

vtkSmartPointer<vtkActor> originalActor =

vtkSmartPointer<vtkActor>::New();

originalActor->SetMapper(originalMapper);

vtkSmartPointer<vtkPolyDataMapper> extractedMapper =

vtkSmartPointer<vtkPolyDataMapper>::New();

extractedMapper->SetInputConnection(connectivityFilter->GetOutputPort());

extractedMapper->Update();

vtkSmartPointer<vtkActor> extractedActor =

vtkSmartPointer<vtkActor>::New();

extractedActor->SetMapper(extractedMapper);

double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};

double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};

vtkSmartPointer<vtkRenderer> leftRenderer =

vtkSmartPointer<vtkRenderer>::New();

leftRenderer->SetViewport(leftViewport);

leftRenderer->AddActor(originalActor);

leftRenderer->SetBackground(0.8, 0.8, 0.8);

vtkSmartPointer<vtkRenderer> rightRenderer =

vtkSmartPointer<vtkRenderer>::New();

rightRenderer->SetViewport(rightViewport);

rightRenderer->AddActor(extractedActor);

rightRenderer->SetBackground(1.0, 1.0, 1.0);

vtkSmartPointer<vtkRenderWindow> renderWindow =

vtkSmartPointer<vtkRenderWindow>::New();

renderWindow->AddRenderer(leftRenderer);

renderWindow->AddRenderer(rightRenderer);

renderWindow->SetSize(640, 320);

renderWindow->Render();

renderWindow->SetWindowName("PolyDataConnectedCompExtract");

leftRenderer->ResetCamera();

rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());

vtkSmartPointer<vtkRenderWindowInteractor> interactor =

vtkSmartPointer<vtkRenderWindowInteractor>::New();

interactor->SetRenderWindow(renderWindow);

interactor->Initialize();

interactor->Start();

return EXIT_SUCCESS;

}