VTK/Examples/Cxx/Broken/Graphs/ExtractSelectedGraph
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ExtractSelectedGraph.cxx
#include <vtkSmartPointer.h>
#include <vtkDataSetAttributes.h>
#include <vtkDoubleArray.h>
#include <vtkExtractSelectedGraph.h>
#include <vtkIdTypeArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkSelection.h>
#include <vtkSelectionNode.h>
#include <vtkDataSetAttributes.h>
#include <vtkDoubleArray.h>
#include <vtkGraphLayoutView.h>
#include <vtkIntArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkStringArray.h>
int main(int, char *[])
{
vtkSmartPointer<vtkMutableUndirectedGraph> g =
vtkSmartPointer<vtkMutableUndirectedGraph>::New();
//create 3 vertices
vtkIdType v1 = g->AddVertex();
vtkIdType v2 = g->AddVertex();
vtkIdType v3 = g->AddVertex();
//add edges
g->AddEdge(v1, v2);
g->AddEdge(v2, v3);
g->AddEdge(v1, v3);
//create the vertex label array
vtkSmartPointer<vtkStringArray> vertexLabels =
vtkSmartPointer<vtkStringArray>::New();
vertexLabels->SetNumberOfComponents(1);
vertexLabels->SetName("VertexLabels");
vertexLabels->InsertNextValue("Label0");
vertexLabels->InsertNextValue("Label1");
vertexLabels->InsertNextValue("Label2");
g->GetVertexData()->AddArray(vertexLabels);
std::cout << "Number of vertices: "
<< g->GetNumberOfVertices() << std::endl;
std::cout << "Number of edges: "
<< g->GetNumberOfEdges() << std::endl;
vtkSmartPointer<vtkIdTypeArray> ids =
vtkSmartPointer<vtkIdTypeArray>::New();
ids->InsertNextValue(0);
ids->InsertNextValue(1);
vtkSmartPointer<vtkSelection> selection =
vtkSmartPointer<vtkSelection>::New();
vtkSmartPointer<vtkSelectionNode> node =
vtkSmartPointer<vtkSelectionNode>::New();
selection->AddNode(node);
node->SetSelectionList(ids);
node->SetContentType(vtkSelectionNode::INDICES);
node->SetFieldType(vtkSelectionNode::VERTEX);
vtkSmartPointer<vtkExtractSelectedGraph> extractSelectedGraph =
vtkSmartPointer<vtkExtractSelectedGraph>::New();
extractSelectedGraph->SetInput(0, g);
extractSelectedGraph->SetInput(1, selection);
extractSelectedGraph->Update();
std::cout << "Number of vertices: "
<< extractSelectedGraph->GetOutput()->GetNumberOfVertices()
<< std::endl;
std::cout << "Number of edges: "
<< extractSelectedGraph->GetOutput()->GetNumberOfEdges()
<< std::endl;
vtkSmartPointer<vtkGraphLayoutView> graphLayoutView =
vtkSmartPointer<vtkGraphLayoutView>::New();
graphLayoutView->AddRepresentationFromInput(g);
graphLayoutView->SetVertexLabelVisibility(true);
graphLayoutView->SetEdgeLabelVisibility(true);
graphLayoutView->SetVertexLabelArrayName("VertexLabels");
graphLayoutView->ResetCamera();
graphLayoutView->Render();
graphLayoutView->GetInteractor()->Start();
graphLayoutView->AddRepresentationFromInput(extractSelectedGraph->GetOutput());
graphLayoutView->ResetCamera();
graphLayoutView->Render();
graphLayoutView->GetInteractor()->Start();
return EXIT_SUCCESS;
}
Please try the new VTKExamples website.
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ExtractSelectedGraph)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ExtractSelectedGraph MACOSX_BUNDLE ExtractSelectedGraph.cxx)
if(VTK_LIBRARIES)
target_link_libraries(ExtractSelectedGraph ${VTK_LIBRARIES})
else()
target_link_libraries(ExtractSelectedGraph vtkHybrid vtkWidgets)
endif()
Download and Build ExtractSelectedGraph
Click here to download ExtractSelectedGraph. and its CMakeLists.txt file.
Once the tarball ExtractSelectedGraph.tar has been downloaded and extracted,
cd ExtractSelectedGraph/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:
./ExtractSelectedGraph
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.