vtkTestGraphAlgorithmFilter

VTKExamples/Cxx/Developers/vtkTestGraphAlgorithmFilter

Code

vtkTestGraphAlgorithmFilter.cxx

#include "vtkTestGraphAlgorithmFilter.h"

#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkDataObject.h"
#include "vtkSmartPointer.h"
#include "vtkMutableUndirectedGraph.h"
#include "vtkMutableDirectedGraph.h"
#include "vtkMutableGraphHelper.h"

vtkStandardNewMacro(vtkTestGraphAlgorithmFilter);

int vtkTestGraphAlgorithmFilter::RequestData(vtkInformation *vtkNotUsed(request),
                                             vtkInformationVector **inputVector,
                                             vtkInformationVector *outputVector)
{

  // get the info objects
  vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the input and ouptut
  vtkGraph *input = vtkGraph::SafeDownCast(
      inInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkGraph *output = vtkGraph::SafeDownCast(
                                    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkSmartPointer<vtkMutableDirectedGraph> mdg =
    vtkSmartPointer<vtkMutableDirectedGraph>::New();

  vtkSmartPointer<vtkMutableUndirectedGraph> mug =
    vtkSmartPointer<vtkMutableUndirectedGraph>::New();

  if(input->IsA("vtkMutableUndirectedGraph"))
  {
    vtkSmartPointer<vtkMutableUndirectedGraph> ug =
      vtkSmartPointer<vtkMutableUndirectedGraph>::New();
    ug->AddVertex();
    output->ShallowCopy(ug);
  }
  else if(input->IsA("vtkMutableDirectedGraph"))
  {
    vtkSmartPointer<vtkMutableDirectedGraph> dg =
      vtkSmartPointer<vtkMutableDirectedGraph>::New();
    dg->AddVertex();
    output->ShallowCopy(dg);
  }


  std::cout << "Output is type: " << output->GetClassName() << std::endl;

  return 1;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(vtkTestGraphAlgorithmFilter)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(vtkTestGraphAlgorithmFilter MACOSX_BUNDLE vtkTestGraphAlgorithmFilter.cxx)

target_link_libraries(vtkTestGraphAlgorithmFilter ${VTK_LIBRARIES})

Download and Build vtkTestGraphAlgorithmFilter

Click here to download vtkTestGraphAlgorithmFilter and its CMakeLists.txt file. Once the tarball vtkTestGraphAlgorithmFilter.tar has been downloaded and extracted,

cd vtkTestGraphAlgorithmFilter/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:

./vtkTestGraphAlgorithmFilter

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.