GeometryFilter
VTKExamples/Cxx/PolyData/GeometryFilter
Description¶
This example demonstrates how to convert an unstructured grid to a polydata. Currently nothing is done with the resulting polydata. If someone has a good data set that demonstrates the conversion, please let us know.
Code¶
GeometryFilter.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkUnstructuredGrid.h> #include <vtkCellArray.h> #include <vtkGeometryFilter.h> #include <vtkPointSource.h> int main(int, char *[]) { vtkSmartPointer<vtkUnstructuredGrid> unstructuredGrid = vtkSmartPointer<vtkUnstructuredGrid>::New(); vtkSmartPointer<vtkGeometryFilter> geometryFilter = vtkSmartPointer<vtkGeometryFilter>::New(); #if VTK_MAJOR_VERSION <= 5 geometryFilter->SetInput(unstructuredGrid); #else geometryFilter->SetInputData(unstructuredGrid); #endif geometryFilter->Update(); vtkPolyData* polydata = geometryFilter->GetOutput(); std::cout << "Output has " << polydata->GetNumberOfPoints() << " points." << std::endl; return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(GeometryFilter) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(GeometryFilter MACOSX_BUNDLE GeometryFilter.cxx) target_link_libraries(GeometryFilter ${VTK_LIBRARIES})
Download and Build GeometryFilter¶
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 Some tarballs may be missing or out-of-date.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 GeometryFilter and its CMakeLists.txt file. Once the tarball GeometryFilter.tar has been downloaded and extracted,
cd GeometryFilter/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:
./GeometryFilter
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.