VTK/Examples/Cxx/Graphs/EdgeWeights
From KitwarePublic
Jump to navigationJump to searchContents
EdgeWeights.cxx
#include <vtkSmartPointer.h>
#include <vtkDataSetAttributes.h>
#include <vtkDoubleArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkCircularLayoutStrategy.h>
#include <vtkDoubleArray.h>
#include <vtkGraphLayoutView.h>
#include <vtkIntArray.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkRenderWindowInteractor.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();
// Create a fully connected graph
g->AddEdge(v1, v2);
g->AddEdge(v2, v3);
g->AddEdge(v1, v3);
// Create the edge weight array
vtkSmartPointer<vtkDoubleArray> weights =
vtkSmartPointer<vtkDoubleArray>::New();
weights->SetNumberOfComponents(1);
weights->SetName("Weights");
// Set the edge weights
weights->InsertNextValue(1.0);
weights->InsertNextValue(1.0);
weights->InsertNextValue(2.0);
// Add the edge weight array to the graph
g->GetEdgeData()->AddArray(weights);
std::cout << "Number of Weights: "
<< vtkDoubleArray::SafeDownCast(
g->GetEdgeData()->GetArray("Weights"))->GetNumberOfTuples()
<< std::endl;
for(vtkIdType i = 0; i < weights->GetNumberOfTuples(); i++)
{
double w = weights->GetValue(i);
std::cout << "Weight " << i << " : " << w << std::endl;
}
vtkSmartPointer<vtkGraphLayoutView> graphLayoutView =
vtkSmartPointer<vtkGraphLayoutView>::New();
graphLayoutView->AddRepresentationFromInput(g);
graphLayoutView->SetEdgeLabelVisibility(true);
graphLayoutView->SetEdgeLabelArrayName("Weights");
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(EdgeWeights)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(EdgeWeights MACOSX_BUNDLE EdgeWeights.cxx)
if(VTK_LIBRARIES)
target_link_libraries(EdgeWeights ${VTK_LIBRARIES})
else()
target_link_libraries(EdgeWeights vtkHybrid vtkWidgets)
endif()
Download and Build EdgeWeights
Click here to download EdgeWeights. and its CMakeLists.txt file.
Once the tarball EdgeWeights.tar has been downloaded and extracted,
cd EdgeWeights/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:
./EdgeWeights
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.