Glyph3DImage
VTKExamples/Cxx/Visualization/Glyph3DImage
Description¶
Supply an image to this example and see the image points glyphed with a vtkPoint. To see the points you may have to interactively zoom the image.
Note
vtkGlyph3DMapper can glyph points from any type of vtkDataObject that has vtkPoints.
Question
If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum
Code¶
Glyph3DImage.cxx
#include <vtkSmartPointer.h> #include <vtkGlyph3DMapper.h> #include <vtkImageReader2Factory.h> #include <vtkImageReader2.h> #include <vtkImageData.h> #include <vtkCellArray.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkActor.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkNamedColors.h> int main(int argc, char *argv[]) { // Verify command line arguments if (argc < 2 ) { std::cout << "Usage: " << argv[0] << " BinaryImage" << std::endl; return EXIT_FAILURE; } // Read file vtkSmartPointer<vtkImageReader2Factory> readerFactory = vtkSmartPointer<vtkImageReader2Factory>::New(); vtkSmartPointer<vtkImageReader2> reader; reader.TakeReference( readerFactory->CreateImageReader2(argv[1])); reader->SetFileName(argv[1]); // Create anything you want here, we will use a point // Create the geometry of a point (the coordinate) vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); const float p[3] = {0.0, 0.0, 0.0}; points->InsertNextPoint(p); vtkSmartPointer<vtkCellArray> vertices = vtkSmartPointer<vtkCellArray>::New(); vtkIdType pid[1]; pid[0] = points->InsertNextPoint(p); vertices->InsertNextCell(1,pid); // Create a polydata object vtkSmartPointer<vtkPolyData> point = vtkSmartPointer<vtkPolyData>::New(); point->SetPoints(points); point->SetVerts(vertices); vtkSmartPointer<vtkGlyph3DMapper> glyph3Dmapper = vtkSmartPointer<vtkGlyph3DMapper>::New(); glyph3Dmapper->SetSourceData(point); glyph3Dmapper->SetInputConnection(reader->GetOutputPort()); glyph3Dmapper->Update(); vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New(); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(glyph3Dmapper); actor->GetProperty()->SetPointSize(3); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene renderer->AddActor(actor); renderer->SetBackground(colors->GetColor3d("SlateGray").GetData()); // Render and interact renderWindow->SetSize(640, 480); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(Glyph3DImage) find_package(VTK COMPONENTS vtkCommonColor vtkCommonCore vtkCommonDataModel vtkFiltersSources vtkIOImage vtkInteractionStyle vtkRenderingContextOpenGL2 vtkRenderingCore vtkRenderingFreeType vtkRenderingGL2PSOpenGL2 vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping Glyph3DImage: ${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(Glyph3DImage MACOSX_BUNDLE Glyph3DImage.cxx ) target_link_libraries(Glyph3DImage PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(Glyph3DImage MACOSX_BUNDLE Glyph3DImage.cxx ) target_link_libraries(Glyph3DImage PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS Glyph3DImage MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build Glyph3DImage¶
Click here to download Glyph3DImage and its CMakeLists.txt file. Once the tarball Glyph3DImage.tar has been downloaded and extracted,
cd Glyph3DImage/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:
./Glyph3DImage
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.