CleanPolyData
VTKExamples/Cxx/PolyData/CleanPolyData
Description¶
When a cube is created, it has 24 vertices (4 for each face). This is done because the normal at each face is very different. Often we would want a cube to only have 8 vertices. The vtkCleanPolyData filter removes coincident points, resulting in the cube we would expect.
Code¶
CleanPolyData.cxx
#include <vtkSmartPointer.h> #include <vtkCubeSource.h> #include <vtkPolyData.h> #include <vtkCleanPolyData.h> int main(int, char *[]) { vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New(); cubeSource->Update(); std::cout << "Input cube has " << cubeSource->GetOutput()->GetNumberOfPoints() << " vertices." << std::endl; vtkSmartPointer<vtkCleanPolyData> cleanPolyData = vtkSmartPointer<vtkCleanPolyData>::New(); cleanPolyData->SetInputConnection(cubeSource->GetOutputPort()); cleanPolyData->Update(); std::cout << "Cleaned cube has " << cleanPolyData->GetOutput()->GetNumberOfPoints() << " vertices." << std::endl; return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(CleanPolyData) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(CleanPolyData MACOSX_BUNDLE CleanPolyData.cxx) target_link_libraries(CleanPolyData ${VTK_LIBRARIES})
Download and Build CleanPolyData¶
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 Some tarballs may be missing or out-of-date.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 CleanPolyData and its CMakeLists.txt file. Once the tarball CleanPolyData.tar has been downloaded and extracted,
cd CleanPolyData/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:
./CleanPolyData
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.