vtkTestFilter

VTKExamples/Cxx/Demos/vtkTestFilter

Code

vtkTestFilter.cxx

#include "vtkTestFilter.h"

#include "vtkObjectFactory.h"
#include "vtkCommand.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkDataObject.h"
#include "vtkSmartPointer.h"
#include "vtkAppendPolyData.h"
#include "vtkSphereSource.h"

vtkStandardNewMacro(vtkTestFilter);

vtkTestFilter::vtkTestFilter()
{
  this->SetNumberOfInputPorts(0);
  this->Output = vtkSmartPointer<vtkPolyData>::New();

  this->RefreshEvent = vtkCommand::UserEvent + 1;

}

int vtkTestFilter::RequestData(vtkInformation *vtkNotUsed(request),
                                             vtkInformationVector **inputVector,
                                             vtkInformationVector *outputVector)
{
  // Get the info object
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

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

  this->Output->DeepCopy(output);

  for(unsigned int i = 0; i < 10; i++)
  {
    Iterate(i);
    this->InvokeEvent(this->RefreshEvent, NULL);
  }

  output->ShallowCopy(this->Output);

  return 1;
}

void vtkTestFilter::Iterate(unsigned int iteration)
{
  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->SetCenter(iteration, 0, 0);
  sphereSource->SetRadius(0.2);
  sphereSource->Update();

  vtkSmartPointer<vtkAppendPolyData> appendFilter =
    vtkSmartPointer<vtkAppendPolyData>::New();
  appendFilter->AddInputConnection(this->Output->GetProducerPort());
  appendFilter->AddInputConnection(sphereSource->GetOutputPort());
  appendFilter->Update();

  this->Output->DeepCopy(appendFilter->GetOutput());
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(vtkTestFilter)

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

add_executable(vtkTestFilter MACOSX_BUNDLE vtkTestFilter.cxx)

target_link_libraries(vtkTestFilter ${VTK_LIBRARIES})

Download and Build vtkTestFilter

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 Some tarballs may be missing or out-of-date.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 vtkTestFilter and its CMakeLists.txt file. Once the tarball vtkTestFilter.tar has been downloaded and extracted,

cd vtkTestFilter/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:

./vtkTestFilter

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.