vtkTestGraphAlgorithmSource

VTKExamples/Cxx/Developers/vtkTestGraphAlgorithmSource

Code

vtkTestGraphAlgorithmSource.cxx

#include "vtkTestGraphAlgorithmSource.h"

#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkDataObject.h"
#include "vtkSmartPointer.h"
#include "vtkMutableUndirectedGraph.h"
#include "vtkUndirectedGraph.h"
#include "vtkGraph.h"

vtkStandardNewMacro(vtkTestGraphAlgorithmSource);

vtkTestGraphAlgorithmSource::vtkTestGraphAlgorithmSource()
{
  this->SetNumberOfInputPorts(0);
  this->SetNumberOfOutputPorts(1);
}

vtkTestGraphAlgorithmSource::~vtkTestGraphAlgorithmSource()
{

}

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

  vtkInformation *outInfo = outputVector->GetInformationObject(0);

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

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

  //add 3 vertices
  NewGraph->AddVertex();
  NewGraph->AddVertex();
  NewGraph->AddVertex();

  output->ShallowCopy(NewGraph);

  return 1;
}

int vtkTestGraphAlgorithmSource::RequestDataObject(
  vtkInformation*, 
  vtkInformationVector**, 
  vtkInformationVector* )
{

  vtkUndirectedGraph *output = 0;
  output = vtkUndirectedGraph::New();


  this->GetExecutive()->SetOutputData(0, output);
  output->Delete();

  return 1;
}

//----------------------------------------------------------------------------
void vtkTestGraphAlgorithmSource::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(vtkTestGraphAlgorithmSource)

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

add_executable(vtkTestGraphAlgorithmSource MACOSX_BUNDLE vtkTestGraphAlgorithmSource.cxx)

target_link_libraries(vtkTestGraphAlgorithmSource ${VTK_LIBRARIES})

Download and Build vtkTestGraphAlgorithmSource

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

cd vtkTestGraphAlgorithmSource/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:

./vtkTestGraphAlgorithmSource

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.