VisualizeStructuredGrid
VTKExamples/Cxx/StructuredGrid/VisualizeStructuredGrid
Description¶
Visualize the points of a structured grid.
Code¶
VisualizeStructuredGrid.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkStructuredGrid.h> #include <vtkXMLStructuredGridWriter.h> #include <vtkMath.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkStructuredGridGeometryFilter.h> int main(int, char *[]) { // Create a grid vtkSmartPointer<vtkStructuredGrid> structuredGrid = vtkSmartPointer<vtkStructuredGrid>::New(); vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); unsigned int numi = 2; unsigned int numj = 3; unsigned int numk = 2; for(unsigned int k = 0; k < numk; k++) { for(unsigned int j = 0; j < numj; j++) { for(unsigned int i = 0; i < numi; i++) { points->InsertNextPoint(i, j, k); } } } // Specify the dimensions of the grid structuredGrid->SetDimensions(numi, numj, numk); structuredGrid->SetPoints(points); std::cout << "There are " << structuredGrid->GetNumberOfPoints() << " points." << std::endl; // there should be 2*3*2 = 12 points std::cout << "There are " << structuredGrid->GetNumberOfCells() << " cells." << std::endl; // The 12 points define the corners of 2 cubes/cells (4 points are shared by both cubes) vtkSmartPointer<vtkStructuredGridGeometryFilter> geometryFilter = vtkSmartPointer<vtkStructuredGridGeometryFilter>::New(); #if VTK_MAJOR_VERSION <= 5 geometryFilter->SetInputConnection(structuredGrid->GetProducerPort()); #else geometryFilter->SetInputData(structuredGrid); #endif geometryFilter->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(geometryFilter->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); actor->GetProperty()->SetPointSize(3); // 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(.2, .3, .4); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(VisualizeStructuredGrid) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(VisualizeStructuredGrid MACOSX_BUNDLE VisualizeStructuredGrid.cxx) target_link_libraries(VisualizeStructuredGrid ${VTK_LIBRARIES})
Download and Build VisualizeStructuredGrid¶
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 VisualizeStructuredGrid and its CMakeLists.txt file. Once the tarball VisualizeStructuredGrid.tar has been downloaded and extracted,
cd VisualizeStructuredGrid/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:
./VisualizeStructuredGrid
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.