FillHoles
VTKExamples/Cxx/Meshes/FillHoles
Description¶
This filter finds holes in a mesh and closes them.
Code¶
FillHoles.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkSelectionNode.h> #include <vtkInformation.h> #include <vtkUnstructuredGrid.h> #include <vtkPolyData.h> #include <vtkPolyDataNormals.h> #include <vtkPointData.h> #include <vtkXMLPolyDataReader.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkSelection.h> #include <vtkSelectionNode.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkCamera.h> #include <vtkProperty.h> #include <vtkIdTypeArray.h> #include <vtkExtractSelection.h> #include <vtkDataSetSurfaceFilter.h> #include <vtkFillHolesFilter.h> static void GenerateData(vtkPolyData*); int main(int argc, char *argv[]) { vtkSmartPointer<vtkPolyData> input = vtkSmartPointer<vtkPolyData>::New(); if(argc == 1) { GenerateData(input); } else { std::string inputFilename = argv[1]; vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader->SetFileName(inputFilename.c_str()); reader->Update(); input->ShallowCopy(reader->GetOutput()); } vtkSmartPointer<vtkFillHolesFilter> fillHolesFilter = vtkSmartPointer<vtkFillHolesFilter>::New(); #if VTK_MAJOR_VERSION <= 5 fillHolesFilter->SetInputConnection(input->GetProducerPort()); #else fillHolesFilter->SetInputData(input); #endif fillHolesFilter->SetHoleSize(1000.0); // Make the triangle windong order consistent vtkSmartPointer<vtkPolyDataNormals> normals = vtkSmartPointer<vtkPolyDataNormals>::New(); normals->SetInputConnection(fillHolesFilter->GetOutputPort()); normals->ConsistencyOn(); normals->SplittingOff(); normals->Update(); // Restore the original normals normals->GetOutput()->GetPointData()-> SetNormals(input->GetPointData()->GetNormals()); // Visualize // Define viewport ranges // (xmin, ymin, xmax, ymax) double leftViewport[4] = {0.0, 0.0, 0.5, 1.0}; double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> originalMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); #if VTK_MAJOR_VERSION <= 5 originalMapper->SetInputConnection(input->GetProducerPort()); #else originalMapper->SetInputData(input); #endif vtkSmartPointer<vtkProperty> backfaceProp = vtkSmartPointer<vtkProperty>::New(); backfaceProp->SetDiffuseColor(0.89,0.81,0.34); vtkSmartPointer<vtkActor> originalActor = vtkSmartPointer<vtkActor>::New(); originalActor->SetMapper(originalMapper); originalActor->SetBackfaceProperty(backfaceProp); originalActor->GetProperty()->SetDiffuseColor(1.0, 0.3882, 0.2784); vtkSmartPointer<vtkPolyDataMapper> filledMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); filledMapper->SetInputConnection(normals->GetOutputPort()); vtkSmartPointer<vtkActor> filledActor = vtkSmartPointer<vtkActor>::New(); filledActor->SetMapper(filledMapper); filledActor->GetProperty()->SetDiffuseColor(1.0, 0.3882, 0.2784); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> leftRenderer = vtkSmartPointer<vtkRenderer>::New(); leftRenderer->SetViewport(leftViewport); vtkSmartPointer<vtkRenderer> rightRenderer = vtkSmartPointer<vtkRenderer>::New(); rightRenderer->SetViewport(rightViewport); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetSize(600,300); renderWindow->AddRenderer(leftRenderer); renderWindow->AddRenderer(rightRenderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene leftRenderer->AddActor(originalActor); rightRenderer->AddActor(filledActor); leftRenderer->SetBackground(.3, .6, .3); // Background color green leftRenderer->GetActiveCamera()->SetPosition(0, -1, 0); leftRenderer->GetActiveCamera()->SetFocalPoint(0, 0, 0); leftRenderer->GetActiveCamera()->SetViewUp(0, 0, 1); leftRenderer->GetActiveCamera()->Azimuth(30); leftRenderer->GetActiveCamera()->Elevation(30); leftRenderer->ResetCamera(); rightRenderer->SetBackground(.5, .6, .1); // Background color green // Share the camera rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera()); // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; } void GenerateData(vtkPolyData* input) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); // Remove some cells vtkSmartPointer<vtkIdTypeArray> ids = vtkSmartPointer<vtkIdTypeArray>::New(); ids->SetNumberOfComponents(1); // Set values ids->InsertNextValue(2); ids->InsertNextValue(10); vtkSmartPointer<vtkSelectionNode> selectionNode = vtkSmartPointer<vtkSelectionNode>::New(); selectionNode->SetFieldType(vtkSelectionNode::CELL); selectionNode->SetContentType(vtkSelectionNode::INDICES); selectionNode->SetSelectionList(ids); selectionNode->GetProperties()->Set(vtkSelectionNode::INVERSE(), 1); //invert the selection vtkSmartPointer<vtkSelection> selection = vtkSmartPointer<vtkSelection>::New(); selection->AddNode(selectionNode); vtkSmartPointer<vtkExtractSelection> extractSelection = vtkSmartPointer<vtkExtractSelection>::New(); extractSelection->SetInputConnection(0, sphereSource->GetOutputPort()); #if VTK_MAJOR_VERSION <= 5 extractSelection->SetInput(1, selection); #else extractSelection->SetInputData(1, selection); #endif extractSelection->Update(); // In selection vtkSmartPointer<vtkDataSetSurfaceFilter> surfaceFilter = vtkSmartPointer<vtkDataSetSurfaceFilter>::New(); surfaceFilter->SetInputConnection(extractSelection->GetOutputPort()); surfaceFilter->Update(); input->ShallowCopy(surfaceFilter->GetOutput()); }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(FillHoles) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(FillHoles MACOSX_BUNDLE FillHoles.cxx) target_link_libraries(FillHoles ${VTK_LIBRARIES})
Download and Build FillHoles¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download FillHoles and its CMakeLists.txt file. Once the tarball FillHoles.tar has been downloaded and extracted,
cd FillHoles/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./FillHoles
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.