RectilinearGrid
VTKExamples/Cxx/RectilinearGrid/RectilinearGrid
Question
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Code¶
RectilinearGrid.cxx
#include <vtkSmartPointer.h> #include <vtkRectilinearGrid.h> #include <vtkMath.h> #include <vtkDoubleArray.h> #include <vtkDataSetMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { // Create a grid vtkSmartPointer<vtkRectilinearGrid> grid = vtkSmartPointer<vtkRectilinearGrid>::New(); grid->SetDimensions(2,3,1); vtkSmartPointer<vtkDoubleArray> xArray = vtkSmartPointer<vtkDoubleArray>::New(); xArray->InsertNextValue(0.0); xArray->InsertNextValue(2.0); vtkSmartPointer<vtkDoubleArray> yArray = vtkSmartPointer<vtkDoubleArray>::New(); yArray->InsertNextValue(0.0); yArray->InsertNextValue(1.0); yArray->InsertNextValue(2.0); vtkSmartPointer<vtkDoubleArray> zArray = vtkSmartPointer<vtkDoubleArray>::New(); zArray->InsertNextValue(0.0); grid->SetXCoordinates(xArray); grid->SetYCoordinates(yArray); grid->SetZCoordinates(zArray); std::cout << "There are " << grid->GetNumberOfPoints() << " points." << std::endl; std::cout << "There are " << grid->GetNumberOfCells() << " cells." << std::endl; for(vtkIdType id = 0; id < grid->GetNumberOfPoints(); id++) { double p[3]; grid->GetPoint(id, p); std::cout << "Point " << id << " : (" << p[0] << " , " << p[1] << " , " << p[2] << ")" << std::endl; } // Create a mapper and actor vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New(); mapper->SetInputData(grid); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Visualize 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(RectilinearGrid) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping RectilinearGrid: ${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(RectilinearGrid MACOSX_BUNDLE RectilinearGrid.cxx ) target_link_libraries(RectilinearGrid PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(RectilinearGrid MACOSX_BUNDLE RectilinearGrid.cxx ) target_link_libraries(RectilinearGrid PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS RectilinearGrid MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build RectilinearGrid¶
Click here to download RectilinearGrid and its CMakeLists.txt file. Once the tarball RectilinearGrid.tar has been downloaded and extracted,
cd RectilinearGrid/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:
./RectilinearGrid
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.