WriteVTU
VTKExamples/Cxx/IO/WriteVTU
Description¶
This example writes a VTU file.
Code¶
WriteVTU.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkTetra.h> #include <vtkCellArray.h> #include <vtkXMLUnstructuredGridReader.h> #include <vtkDataSetMapper.h> #include <vtkActor.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkXMLUnstructuredGridWriter.h> #include <vtkUnstructuredGrid.h> #include <vtkPointData.h> #include <vtkVertexGlyphFilter.h> int main(int argc, char *argv[]) { // Parse command line arguments if(argc != 2) { std::cout << "Required arguments: OutputFilename" << std::endl; return EXIT_FAILURE; } std::string filename = argv[1]; vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(0, 0, 0); points->InsertNextPoint(1, 0, 0); points->InsertNextPoint(1, 1, 0); points->InsertNextPoint(0, 1, 1); vtkSmartPointer<vtkTetra> tetra = vtkSmartPointer<vtkTetra>::New(); tetra->GetPointIds()->SetId(0, 0); tetra->GetPointIds()->SetId(1, 1); tetra->GetPointIds()->SetId(2, 2); tetra->GetPointIds()->SetId(3, 3); vtkSmartPointer<vtkCellArray> cellArray = vtkSmartPointer<vtkCellArray>::New(); cellArray->InsertNextCell(tetra); vtkSmartPointer<vtkUnstructuredGrid> unstructuredGrid = vtkSmartPointer<vtkUnstructuredGrid>::New(); unstructuredGrid->SetPoints(points); unstructuredGrid->SetCells(VTK_TETRA, cellArray); // Write file vtkSmartPointer<vtkXMLUnstructuredGridWriter> writer = vtkSmartPointer<vtkXMLUnstructuredGridWriter>::New(); writer->SetFileName(filename.c_str()); #if VTK_MAJOR_VERSION <= 5 writer->SetInput(unstructuredGrid); #else writer->SetInputData(unstructuredGrid); #endif writer->Write(); // Read and display file for verification that it was written correclty vtkSmartPointer<vtkXMLUnstructuredGridReader> reader = vtkSmartPointer<vtkXMLUnstructuredGridReader>::New(); reader->SetFileName(filename.c_str()); reader->Update(); 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(WriteVTU) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(WriteVTU MACOSX_BUNDLE WriteVTU.cxx) target_link_libraries(WriteVTU ${VTK_LIBRARIES})
Download and Build WriteVTU¶
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 WriteVTU and its CMakeLists.txt file. Once the tarball WriteVTU.tar has been downloaded and extracted,
cd WriteVTU/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:
./WriteVTU
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.