ReadUnknownTypeXMLFile
VTKExamples/Cxx/IO/ReadUnknownTypeXMLFile
Description¶
This examples reads either a vtu (unstructured grid) or vtp (polydata) file and displays it to the screen.
Code¶
ReadUnknownTypeXMLFile.cxx
#include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkUnstructuredGrid.h> #include <vtkDataSetMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkXMLGenericDataObjectReader.h> int main(int argc, char *argv[]) { // Ensure a filename was specified if(argc < 2) { std::cerr << "Required arguments: InputFilename" << std::endl; return EXIT_FAILURE; } // Get the filename from the command line std::string inputFilename = argv[1]; // Get all data from the file vtkSmartPointer<vtkXMLGenericDataObjectReader> reader = vtkSmartPointer<vtkXMLGenericDataObjectReader>::New(); reader->SetFileName(inputFilename.c_str()); reader->Update(); // All of the standard data types can be checked and obtained like this: if(vtkPolyData::SafeDownCast(reader->GetOutput())) { std::cout << "File is a polydata" << std::endl; } else if(vtkUnstructuredGrid::SafeDownCast(reader->GetOutput())) { std::cout << "File is an unstructured grid" << std::endl; } // Visualize vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New(); mapper->SetInputConnection(reader->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderer->AddActor(actor); renderer->SetBackground(.3, .6, .3); // Background color green renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ReadUnknownTypeXMLFile) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ReadUnknownTypeXMLFile MACOSX_BUNDLE ReadUnknownTypeXMLFile.cxx) target_link_libraries(ReadUnknownTypeXMLFile ${VTK_LIBRARIES})
Download and Build ReadUnknownTypeXMLFile¶
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 Some tarballs may be missing or out-of-date.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 ReadUnknownTypeXMLFile and its CMakeLists.txt file. Once the tarball ReadUnknownTypeXMLFile.tar has been downloaded and extracted,
cd ReadUnknownTypeXMLFile/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:
./ReadUnknownTypeXMLFile
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.