SelectedVerticesAndEdges
VTKExamples/Cxx/Graphs/SelectedVerticesAndEdges
Description¶
- Thanks to Eric Monson
Other Languages
See (Python)
Code¶
SelectedVerticesAndEdges.cxx
#include <vtkSmartPointer.h> #include <vtkAnnotationLink.h> #include <vtkRenderedGraphRepresentation.h> #include <vtkRenderer.h> #include <vtkHardwareSelector.h> #include <vtkDoubleArray.h> #include <vtkSelectionNode.h> #include <vtkIdTypeArray.h> #include <vtkSelection.h> #include <vtkRenderWindow.h> #include <vtkUnsignedCharArray.h> #include <vtkObjectFactory.h> #include <vtkGraphLayoutStrategy.h> #include <vtkGraphLayoutView.h> #include <vtkGraphWriter.h> #include <vtkMutableUndirectedGraph.h> #include <vtkRenderWindowInteractor.h> #include <vtkSimple2DLayoutStrategy.h> #include <vtkInteractorStyleRubberBand2D.h> class RubberBandStyle : public vtkInteractorStyleRubberBand2D { public: static RubberBandStyle* New(); vtkTypeMacro(RubberBandStyle, vtkInteractorStyleRubberBand2D); virtual void OnLeftButtonUp() { // Forward events vtkInteractorStyleRubberBand2D::OnLeftButtonUp(); vtkSelection* selection = this->View->GetRepresentation()->GetAnnotationLink()->GetCurrentSelection(); vtkSelectionNode* vertices; vtkSelectionNode* edges; if(selection->GetNode(0)->GetFieldType() == vtkSelectionNode::VERTEX) { vertices = selection->GetNode(0); } else if(selection->GetNode(0)->GetFieldType() == vtkSelectionNode::EDGE) { edges = selection->GetNode(0); } if(selection->GetNode(1)->GetFieldType() == vtkSelectionNode::VERTEX) { vertices = selection->GetNode(1); } else if(selection->GetNode(1)->GetFieldType() == vtkSelectionNode::EDGE) { edges = selection->GetNode(1); } vtkIdTypeArray* vertexList = vtkIdTypeArray::SafeDownCast(vertices->GetSelectionList()); std::cout << "There are " << vertexList->GetNumberOfTuples() << " vertices selected." << std::endl; if(vertexList->GetNumberOfTuples() > 0) { std::cout << "Vertex Ids: "; } for(vtkIdType i = 0; i < vertexList->GetNumberOfTuples(); i++) { std::cout << vertexList->GetValue(i) << " "; } std::cout << std::endl; vtkIdTypeArray* edgeList = vtkIdTypeArray::SafeDownCast(edges->GetSelectionList()); std::cout << "There are " << edgeList->GetNumberOfTuples() << " edges selected." << std::endl; if(edgeList->GetNumberOfTuples() > 0) { std::cout << "Edge Ids: "; } for(vtkIdType i = 0; i < edgeList->GetNumberOfTuples(); i++) { std::cout << edgeList->GetValue(i) << " "; } std::cout << std::endl; } vtkGraphLayoutView* View; }; vtkStandardNewMacro(RubberBandStyle); int main(int, char *[]) { vtkSmartPointer<vtkMutableUndirectedGraph> g = vtkSmartPointer<vtkMutableUndirectedGraph>::New(); vtkIdType v1 = g->AddVertex(); vtkIdType v2 = g->AddVertex(); g->AddEdge(v1, v2); g->AddEdge(v1, v2); vtkSmartPointer<vtkGraphLayoutView> view = vtkSmartPointer<vtkGraphLayoutView>::New(); view->AddRepresentationFromInput(g); view->SetLayoutStrategy("Simple 2D"); vtkSmartPointer<RubberBandStyle> style = vtkSmartPointer<RubberBandStyle>::New(); style->View = view; view->SetInteractorStyle(style); view->ResetCamera(); view->Render(); view->GetInteractor()->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(SelectedVerticesAndEdges) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkFiltersGeneral vtkIOLegacy vtkInfovisLayout vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 vtkViewsInfovis QUIET) if (NOT VTK_FOUND) message("Skipping SelectedVerticesAndEdges: ${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(SelectedVerticesAndEdges MACOSX_BUNDLE SelectedVerticesAndEdges.cxx ) target_link_libraries(SelectedVerticesAndEdges PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(SelectedVerticesAndEdges MACOSX_BUNDLE SelectedVerticesAndEdges.cxx ) target_link_libraries(SelectedVerticesAndEdges PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS SelectedVerticesAndEdges MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build SelectedVerticesAndEdges¶
Click here to download SelectedVerticesAndEdges and its CMakeLists.txt file. Once the tarball SelectedVerticesAndEdges.tar has been downloaded and extracted,
cd SelectedVerticesAndEdges/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:
./SelectedVerticesAndEdges
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.