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
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.