ConnectivityFilter
VTKExamples/Cxx/Filtering/ConnectivityFilter
Code
ConnectivityFilter.cxx
#include <vtkSmartPointer.h>
#include <vtkUnstructuredGrid.h>
#include <vtkSphereSource.h>
#include <vtkConnectivityFilter.h>
#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkAppendFilter.h>
#include <vtkDelaunay3D.h>
int main(int, char*[])
{
vtkSmartPointer<vtkSphereSource> sphereSource1 =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource1->Update();
vtkSmartPointer<vtkDelaunay3D> delaunay1 =
vtkSmartPointer<vtkDelaunay3D>::New();
delaunay1->SetInputConnection(sphereSource1->GetOutputPort());
delaunay1->Update();
vtkSmartPointer<vtkSphereSource> sphereSource2 =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource2->SetCenter(5,0,0);
sphereSource2->Update();
vtkSmartPointer<vtkDelaunay3D> delaunay2 =
vtkSmartPointer<vtkDelaunay3D>::New();
delaunay2->SetInputConnection(sphereSource2->GetOutputPort());
delaunay2->Update();
vtkSmartPointer<vtkAppendFilter> appendFilter =
vtkSmartPointer<vtkAppendFilter>::New();
appendFilter->AddInputConnection(delaunay1->GetOutputPort());
appendFilter->AddInputConnection(delaunay2->GetOutputPort());
appendFilter->Update();
vtkSmartPointer<vtkConnectivityFilter> connectivityFilter =
vtkSmartPointer<vtkConnectivityFilter>::New();
connectivityFilter->SetInputConnection(appendFilter->GetOutputPort());
connectivityFilter->SetExtractionModeToAllRegions();
connectivityFilter->ColorRegionsOn();
connectivityFilter->Update();
// Visualize
vtkSmartPointer<vtkDataSetMapper> mapper =
vtkSmartPointer<vtkDataSetMapper>::New();
mapper->SetInputConnection(connectivityFilter->GetOutputPort());
mapper->Update();
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
vtkSmartPointer<vtkRenderWindow> renwin =
vtkSmartPointer<vtkRenderWindow>::New();
renwin->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> iren =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
iren->SetRenderWindow(renwin);
iren->Initialize();
iren->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ConnectivityFilter)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ConnectivityFilter MACOSX_BUNDLE ConnectivityFilter.cxx)
target_link_libraries(ConnectivityFilter ${VTK_LIBRARIES})
Download and Build ConnectivityFilter
Click here to download ConnectivityFilter and its CMakeLists.txt file. Once the tarball ConnectivityFilter.tar has been downloaded and extracted,
cd ConnectivityFilter/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:
./ConnectivityFilter
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.