ColorDisconnectedRegions
VTKExamples/Cxx/PolyData/ColorDisconnectedRegions
Code¶
ColorDisconnectedRegions.cxx
#include <vtkSmartPointer.h> #include <vtkPointData.h> #include <vtkSphereSource.h> #include <vtkPolyDataConnectivityFilter.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkProperty.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkAppendPolyData.h> int main(int, char*[]) { // Create some spheres vtkSmartPointer<vtkSphereSource> sphereSource1 = vtkSmartPointer<vtkSphereSource>::New(); sphereSource1->Update(); vtkSmartPointer<vtkSphereSource> sphereSource2 = vtkSmartPointer<vtkSphereSource>::New(); sphereSource2->SetCenter(5,0,0); sphereSource2->Update(); vtkSmartPointer<vtkSphereSource> sphereSource3 = vtkSmartPointer<vtkSphereSource>::New(); sphereSource3->SetCenter(10,0,0); sphereSource3->Update(); vtkSmartPointer<vtkAppendPolyData> appendFilter = vtkSmartPointer<vtkAppendPolyData>::New(); appendFilter->AddInputConnection(sphereSource1->GetOutputPort()); appendFilter->AddInputConnection(sphereSource2->GetOutputPort()); appendFilter->AddInputConnection(sphereSource3->GetOutputPort()); appendFilter->Update(); vtkSmartPointer<vtkPolyDataConnectivityFilter> connectivityFilter = vtkSmartPointer<vtkPolyDataConnectivityFilter>::New(); connectivityFilter->SetInputConnection(appendFilter->GetOutputPort()); connectivityFilter->SetExtractionModeToAllRegions(); connectivityFilter->ColorRegionsOn(); connectivityFilter->Update(); // Visualize vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(connectivityFilter->GetOutputPort()); mapper->SetScalarRange(connectivityFilter->GetOutput()->GetPointData()->GetArray("RegionId")->GetRange()); mapper->Update(); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); interactor->Initialize(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ColorDisconnectedRegions) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ColorDisconnectedRegions MACOSX_BUNDLE ColorDisconnectedRegions.cxx) target_link_libraries(ColorDisconnectedRegions ${VTK_LIBRARIES})
Download and Build ColorDisconnectedRegions¶
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 ColorDisconnectedRegions and its CMakeLists.txt file. Once the tarball ColorDisconnectedRegions.tar has been downloaded and extracted,
cd ColorDisconnectedRegions/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:
./ColorDisconnectedRegions
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.