DirectedGraphToMutableDirectedGraph
VTKExamples/Cxx/Graphs/Conversions/DirectedGraphToMutableDirectedGraph
Code¶
DirectedGraphToMutableDirectedGraph.cxx
#include <vtkSmartPointer.h> #include <vtkPoints.h> #include <vtkMutableDirectedGraph.h> #include <vtkDirectedGraph.h> int main (int, char *[]) { //create a graph vtkSmartPointer<vtkMutableDirectedGraph> mdg = vtkSmartPointer<vtkMutableDirectedGraph>::New(); //add 4 vertices to the graph vtkIdType v1 = mdg->AddVertex(); vtkIdType v2 = mdg->AddVertex(); vtkIdType v3 = mdg->AddVertex(); vtkIdType v4 = mdg->AddVertex(); //add 3 edges to the graph mdg->AddEdge ( v1, v2 ); mdg->AddEdge ( v1, v3 ); mdg->AddEdge ( v1, v4 ); //create 4 points - one for each vertex vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(0.0, 0.0, 0.0); points->InsertNextPoint(1.0, 0.0, 0.0); points->InsertNextPoint(0.0, 1.0, 0.0); points->InsertNextPoint(0.0, 0.0, 2.0); //add the coordinates of the points to the graph mdg->SetPoints(points); std::cout << "MDG: " << std::endl; std::cout << "Type: " << mdg->GetClassName() << std::endl; std::cout << "Vertices: " << mdg->GetNumberOfVertices() << std::endl; std::cout << "Edges: " << mdg->GetNumberOfEdges() << std::endl; vtkSmartPointer<vtkDirectedGraph> dg = vtkSmartPointer<vtkDirectedGraph>::New(); if(!dg->CheckedShallowCopy(mdg)) { std::cerr << "Could not convert graph to tree!" << std::endl; return EXIT_FAILURE; } std::cout << "DG: " << std::endl; std::cout << "Type: " << dg->GetClassName() << std::endl; std::cout << "Vertices: " << dg->GetNumberOfVertices() << std::endl; std::cout << "Edges: " << dg->GetNumberOfEdges() << std::endl; vtkSmartPointer<vtkMutableDirectedGraph> mdg2 = vtkSmartPointer<vtkMutableDirectedGraph>::New(); if(!mdg2->CheckedShallowCopy(dg)) { std::cerr << "Could not convert graph to tree!" << std::endl; return EXIT_FAILURE; } std::cout << "MDG2: " << std::endl; std::cout << "Type: " << mdg2->GetClassName() << std::endl; std::cout << "Vertices: " << mdg2->GetNumberOfVertices() << std::endl; std::cout << "Edges: " << mdg2->GetNumberOfEdges() << std::endl; return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(DirectedGraphToMutableDirectedGraph) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(DirectedGraphToMutableDirectedGraph MACOSX_BUNDLE DirectedGraphToMutableDirectedGraph.cxx) target_link_libraries(DirectedGraphToMutableDirectedGraph ${VTK_LIBRARIES})
Download and Build DirectedGraphToMutableDirectedGraph¶
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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 DirectedGraphToMutableDirectedGraph and its CMakeLists.txt file. Once the tarball DirectedGraphToMutableDirectedGraph.tar has been downloaded and extracted,
cd DirectedGraphToMutableDirectedGraph/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:
./DirectedGraphToMutableDirectedGraph
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.