GetMiscCellData
VTKExamples/Cxx/PolyData/GetMiscCellData
Code¶
GetMiscCellData.cxx
#include <vtkSmartPointer.h> #include <vtkCellData.h> #include <vtkCellArray.h> #include <vtkFloatArray.h> #include <vtkTriangle.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkXMLPolyDataReader.h> int main(int argc, char *argv[]) { // Parse command line arguments if(argc != 3) { std::cout << "Required arguments: Filename ArrayName" << std::endl; return EXIT_FAILURE; } // Get filename from command line std::string filename = argv[1]; //first command line argument // Get array name std::string arrayName = argv[2]; //second command line argument //read the file vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader->SetFileName(filename.c_str()); reader->Update(); vtkPolyData* polydata = reader->GetOutput(); // Get the number of cells in the polydata vtkIdType idNumCellsInFile = polydata->GetNumberOfCells(); vtkSmartPointer<vtkFloatArray> array = vtkFloatArray::SafeDownCast(polydata->GetCellData()->GetArray(arrayName.c_str())); if(array) { std::cout << "Got array " << arrayName << " with " << idNumCellsInFile << " values" << std::endl; for(int i = 0; i < idNumCellsInFile; i++) { double value; value = array->GetValue(i); std::cout << i << ": " << value << std::endl; } } else { std::cout << "The file " << filename << " does not have a CellData array named " << arrayName << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(GetMiscCellData) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(GetMiscCellData MACOSX_BUNDLE GetMiscCellData.cxx) target_link_libraries(GetMiscCellData ${VTK_LIBRARIES})
Download and Build GetMiscCellData¶
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Click here to download GetMiscCellData and its CMakeLists.txt file. Once the tarball GetMiscCellData.tar has been downloaded and extracted,
cd GetMiscCellData/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:
./GetMiscCellData
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.