ColorEdges
VTKExamples/Cxx/Graphs/ColorEdges
Code¶
ColorEdges.cxx
#include <vtkSmartPointer.h> #include <vtkDataSetAttributes.h> #include <vtkGraphLayoutView.h> #include <vtkIntArray.h> #include <vtkLookupTable.h> #include <vtkMutableDirectedGraph.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkViewTheme.h> int main(int, char *[]) { vtkSmartPointer<vtkMutableDirectedGraph> graph = vtkSmartPointer<vtkMutableDirectedGraph>::New(); // Create a graph vtkIdType v1 = graph->AddVertex(); vtkIdType v2 = graph->AddVertex(); vtkIdType v3 = graph->AddVertex(); graph->AddEdge(v1,v2); graph->AddEdge(v2,v3); // Create the color array vtkSmartPointer<vtkIntArray> edgeColors = vtkSmartPointer<vtkIntArray>::New(); edgeColors->SetNumberOfComponents(1); edgeColors->SetName("Color"); vtkSmartPointer<vtkLookupTable> lookupTable = vtkSmartPointer<vtkLookupTable>::New(); lookupTable->SetNumberOfTableValues(2); lookupTable->SetTableValue(0, 1.0, 0.0, 0.0); // red lookupTable->SetTableValue(1, 0.0, 1.0, 0.0); // green lookupTable->Build(); edgeColors->InsertNextValue(0); edgeColors->InsertNextValue(1); // Add the color array to the graph graph->GetEdgeData()->AddArray(edgeColors); vtkSmartPointer<vtkGraphLayoutView> graphLayoutView = vtkSmartPointer<vtkGraphLayoutView>::New(); graphLayoutView->AddRepresentationFromInput(graph); graphLayoutView->SetLayoutStrategyToTree(); graphLayoutView->SetEdgeColorArrayName("Color"); graphLayoutView->ColorEdgesOn(); vtkSmartPointer<vtkViewTheme> theme = vtkSmartPointer<vtkViewTheme>::New(); theme->SetCellLookupTable(lookupTable); graphLayoutView->ApplyViewTheme(theme); graphLayoutView->ResetCamera(); graphLayoutView->GetInteractor()->Initialize(); graphLayoutView->GetInteractor()->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ColorEdges) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ColorEdges MACOSX_BUNDLE ColorEdges.cxx) target_link_libraries(ColorEdges ${VTK_LIBRARIES})
Download and Build ColorEdges¶
Danger
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 Some tarballs may be missing or out-of-date.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 ColorEdges and its CMakeLists.txt file. Once the tarball ColorEdges.tar has been downloaded and extracted,
cd ColorEdges/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:
./ColorEdges
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.