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
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.