VTK/Examples/Cxx/Graphs/InEdgeIterator
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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;
}
}
}
Please try the new VTKExamples website.
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)
if(VTK_LIBRARIES)
target_link_libraries(InEdgeIterator ${VTK_LIBRARIES})
else()
target_link_libraries(InEdgeIterator vtkHybrid vtkWidgets)
endif()
Download and Build InEdgeIterator
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.