FindAllArrayNames
VTKExamples/Cxx/IO/FindAllArrayNames
Description¶
This example shows how to find out the names of all of the data arrays stored in a vtkPolyData.
Code¶
FindAllArrayNames.cxx
#include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkPointData.h> #include <vtkCellData.h> #include <vtkXMLPolyDataReader.h> #include <vtkSphereSource.h> #include <vtkCubeSource.h> #include <vtkXMLPolyDataWriter.h> #include <vector> #include <string> void FindAllData(vtkPolyData* polydata); int main(int argc, char *argv[]) { vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); if(argc < 2) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); vtkSmartPointer<vtkXMLPolyDataWriter> writer = vtkSmartPointer<vtkXMLPolyDataWriter>::New(); writer->SetFileName("test.vtp"); writer->SetInputConnection(sphereSource->GetOutputPort()); writer->Write(); polydata = sphereSource->GetOutput(); } else { vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader->SetFileName(argv[1]); reader->Update(); polydata = reader->GetOutput(); } FindAllData(polydata); return EXIT_SUCCESS; } void FindAllData(vtkPolyData* polydata) { std::cout << "Normals: " << polydata->GetPointData()->GetNormals() << std::endl; vtkIdType numberOfPointArrays = polydata->GetPointData()->GetNumberOfArrays(); std::cout << "Number of PointData arrays: " << numberOfPointArrays << std::endl; vtkIdType numberOfCellArrays = polydata->GetCellData()->GetNumberOfArrays(); std::cout << "Number of CellData arrays: " << numberOfCellArrays << std::endl; std::cout << "Type table/key: " << std::endl;; //more values can be found in <VTK_DIR>/Common/vtkSetGet.h std::cout << VTK_UNSIGNED_CHAR << " unsigned char" << std::endl; std::cout << VTK_UNSIGNED_INT << " unsigned int" << std::endl; std::cout << VTK_FLOAT << " float" << std::endl; std::cout << VTK_DOUBLE << " double" << std::endl; for(vtkIdType i = 0; i < numberOfPointArrays; i++) { // The following two lines are equivalent //arrayNames.push_back(polydata->GetPointData()->GetArray(i)->GetName()); //arrayNames.push_back(polydata->GetPointData()->GetArrayName(i)); int dataTypeID = polydata->GetPointData()->GetArray(i)->GetDataType(); std::cout << "Array " << i << ": " << polydata->GetPointData()->GetArrayName(i) << " (type: " << dataTypeID << ")" << std::endl; } for(vtkIdType i = 0; i < numberOfCellArrays; i++) { // The following two lines are equivalent //polydata->GetPointData()->GetArray(i)->GetName(); //polydata->GetPointData()->GetArrayName(i); int dataTypeID = polydata->GetCellData()->GetArray(i)->GetDataType(); std::cout << "Array " << i << ": " << polydata->GetCellData()->GetArrayName(i) << " (type: " << dataTypeID << ")" << std::endl; } }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(FindAllArrayNames) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(FindAllArrayNames MACOSX_BUNDLE FindAllArrayNames.cxx) target_link_libraries(FindAllArrayNames ${VTK_LIBRARIES})
Download and Build FindAllArrayNames¶
Danger
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Click here to download FindAllArrayNames and its CMakeLists.txt file. Once the tarball FindAllArrayNames.tar has been downloaded and extracted,
cd FindAllArrayNames/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:
./FindAllArrayNames
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.