ReadExodusData
VTKExamples/Cxx/IO/ReadExodusData
Description¶
The exmaple uses vtkExodusIIReader to read an ExodusII file. The nodal variable to read is the second argument. The nodal variable is displayed with a color map.
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See (Python)
Question
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Code¶
ReadExodusData.cxx
#include <vtkNew.h> #include <vtkNamedColors.h> #include <vtkExodusIIReader.h> #include <vtkCompositeDataGeometryFilter.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkCamera.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkCompositeDataGeometryFilter.h> int main (int argc, char *argv[]) { vtkNew<vtkNamedColors> colors; if (argc < 3) { std::cout << "Ysage: " << argv[0] << " exodus_file.e nodal_variable"; return EXIT_FAILURE; } // Read Exodus Data vtkNew<vtkExodusIIReader> reader; reader->SetFileName(argv[1]); reader->UpdateInformation(); reader->SetTimeStep(10); reader->SetAllArrayStatus(vtkExodusIIReader::NODAL, 1); // enables all NODAL variables // Create Geometry vtkNew<vtkCompositeDataGeometryFilter> geometry; geometry->SetInputConnection(0, reader->GetOutputPort(0)); // Mapper vtkNew<vtkPolyDataMapper> mapper; mapper->SetInputConnection(geometry->GetOutputPort()); mapper->SelectColorArray(argv[2]); mapper->SetScalarModeToUsePointFieldData(); mapper->InterpolateScalarsBeforeMappingOn(); // Actor vtkNew<vtkActor> actor; actor->SetMapper(mapper); // Renderer vtkNew<vtkRenderer> renderer; renderer->AddViewProp(actor); renderer->SetBackground(colors->GetColor3d("DimGray").GetData()); renderer->GetActiveCamera()->SetPosition(9.0, 9.0, 7.0); renderer->GetActiveCamera()->SetFocalPoint(0, 0, 0); renderer->GetActiveCamera()->SetViewUp(0.2, -0.7, 0.7); renderer->GetActiveCamera()->SetDistance(14.5); // Window and Interactor vtkNew<vtkRenderWindow> window; window->AddRenderer(renderer); window->SetSize(600, 600); vtkNew<vtkRenderWindowInteractor> interactor; interactor->SetRenderWindow(window); interactor->Initialize(); // Show the result window->Render(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(ReadExodusData) find_package(VTK COMPONENTS vtkCommonColor vtkCommonCore vtkFiltersGeometry vtkIOExodus vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping ReadExodusData: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(ReadExodusData MACOSX_BUNDLE ReadExodusData.cxx ) target_link_libraries(ReadExodusData PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ReadExodusData MACOSX_BUNDLE ReadExodusData.cxx ) target_link_libraries(ReadExodusData PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ReadExodusData MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ReadExodusData¶
Click here to download ReadExodusData and its CMakeLists.txt file. Once the tarball ReadExodusData.tar has been downloaded and extracted,
cd ReadExodusData/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:
./ReadExodusData
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.