ReadRectilinearGrid
VTKExamples/Cxx/IO/ReadRectilinearGrid
Description¶
This example reads a rectilinear grid (.vtr) file. An example file can be found at VTKData/Data/cth.vtr
Other Languages
See (CSharp)
Code¶
ReadRectilinearGrid.cxx
#include <vtkSmartPointer.h> #include <vtkProperty.h> #include <vtkDataSetMapper.h> #include <vtkXMLRectilinearGridReader.h> #include <vtkRectilinearGridGeometryFilter.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> int main(int argc, char* argv[]) { // Verify input arguments if(argc < 2) { std::cout << "Usage: " << argv[0] << " Filename.vtr" << std::endl; return EXIT_FAILURE; } // Parse arguments std::string inputFilename = argv[1]; // Read the file vtkSmartPointer<vtkXMLRectilinearGridReader> reader = vtkSmartPointer<vtkXMLRectilinearGridReader>::New(); reader->SetFileName(inputFilename.c_str()); reader->Update(); /* vtkSmartPointer<vtkRectilinearGridGeometryFilter> geometryFilter = vtkSmartPointer<vtkRectilinearGridGeometryFilter>::New(); geometryFilter->SetInputConnection(reader->GetOutputPort()); geometryFilter->Update(); */ // Visualize vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New(); //mapper->SetInputConnection(geometryFilter->GetOutputPort()); mapper->SetInputConnection(reader->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); actor->GetProperty()->SetRepresentationToWireframe(); 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 3.3 FATAL_ERROR) project(ReadRectilinearGrid) find_package(VTK COMPONENTS vtkCommonCore vtkFiltersGeometry vtkIOXML vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping ReadRectilinearGrid: ${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(ReadRectilinearGrid MACOSX_BUNDLE ReadRectilinearGrid.cxx ) target_link_libraries(ReadRectilinearGrid PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ReadRectilinearGrid MACOSX_BUNDLE ReadRectilinearGrid.cxx ) target_link_libraries(ReadRectilinearGrid PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ReadRectilinearGrid MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ReadRectilinearGrid¶
Click here to download ReadRectilinearGrid and its CMakeLists.txt file. Once the tarball ReadRectilinearGrid.tar has been downloaded and extracted,
cd ReadRectilinearGrid/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:
./ReadRectilinearGrid
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.