InEdgeIterator
VTKExamples/Cxx/Graphs/InEdgeIterator
Code¶
InEdgeIterator.cxx
#include <vtkMutableUndirectedGraph.h> #include <vtkMutableDirectedGraph.h> #include <vtkSmartPointer.h> #include <vtkInEdgeIterator.h> static void Undirected(); static void Directed(); int main(int, char *[]) { Undirected(); Directed(); return EXIT_SUCCESS; } void Undirected() { vtkSmartPointer<vtkMutableUndirectedGraph> g = vtkSmartPointer<vtkMutableUndirectedGraph>::New(); // Create a graph vtkIdType v0 = g->AddVertex(); vtkIdType v1 = g->AddVertex(); vtkIdType v2 = g->AddVertex(); g->AddEdge(v0, v1); g->AddEdge(v1, v2); g->AddEdge(v0, v2); // Find all incoming edges connected to a vertex vtkSmartPointer<vtkInEdgeIterator> it = vtkSmartPointer<vtkInEdgeIterator>::New(); g->GetInEdges(0, it); while(it->HasNext()) { vtkInEdgeType edge = it->Next(); std::cout << "Edge id: " << edge.Id << " Source: " << edge.Source << std::endl; } } void Directed() { vtkSmartPointer<vtkMutableDirectedGraph> g = vtkSmartPointer<vtkMutableDirectedGraph>::New(); // Create a graph vtkIdType v0 = g->AddVertex(); vtkIdType v1 = g->AddVertex(); vtkIdType v2 = g->AddVertex(); g->AddEdge(v0, v1); g->AddEdge(v0, v2); { std::cout << "Finding edges connected to vertex 0" << std::endl; vtkSmartPointer<vtkInEdgeIterator> it = vtkSmartPointer<vtkInEdgeIterator>::New(); g->GetInEdges(0, it); while(it->HasNext()) { vtkInEdgeType edge = it->Next(); std::cout << "Edge id: " << edge.Id << " " << "Source: " << edge.Source << std::endl; } std::cout << "Nothing should be output, vertex 0 has no incoming edges!" << std::endl; } { std::cout << "Finding edges connected to vertex 1" << std::endl; vtkSmartPointer<vtkInEdgeIterator> it = vtkSmartPointer<vtkInEdgeIterator>::New(); g->GetInEdges(1, it); while(it->HasNext()) { vtkInEdgeType edge = it->Next(); std::cout << "Edge id: " << edge.Id << " " << "Source: " << edge.Source << std::endl; } } }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(InEdgeIterator) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(InEdgeIterator MACOSX_BUNDLE InEdgeIterator.cxx) target_link_libraries(InEdgeIterator ${VTK_LIBRARIES})
Download and Build InEdgeIterator¶
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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 Some tarballs may be missing or out-of-date.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 InEdgeIterator and its CMakeLists.txt file. Once the tarball InEdgeIterator.tar has been downloaded and extracted,
cd InEdgeIterator/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:
./InEdgeIterator
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.