FilterProgress

VTKExamples/Cxx/Developers/FilterProgress

Code

FilterProgress.cxx

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkSphereSource.h>
#include <vtkCallbackCommand.h>
#include <vtkCommand.h>

#include "vtkTestFilterProgressFilter.h"

void ProgressFunction(vtkObject* caller,
                      long unsigned int eventId,
                      void* clientData,
                      void* callData);

int main(int, char *[])
{ 
  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();

  vtkSmartPointer<vtkTestFilterProgressFilter> testFilter = 
    vtkSmartPointer<vtkTestFilterProgressFilter>::New();
  testFilter->SetInputConnection(sphereSource->GetOutputPort());
  testFilter->Update();

  return EXIT_SUCCESS;
}

vtkTestFilterProgressFilter.h

#ifndef __vtkTestFilterProgressFilter_h
#define __vtkTestFilterProgressFilter_h

#include "vtkPolyDataAlgorithm.h"

class vtkTestFilterProgressFilter : public vtkPolyDataAlgorithm 
{
public:
  static vtkTestFilterProgressFilter *New();
  vtkTypeMacro(vtkTestFilterProgressFilter,vtkAlgorithm);

protected:
  vtkTestFilterProgressFilterr();
  ~vtkTestFilterProgressFilter() VTK_OVERRIDE {}

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE; 

  static void ProgressFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData);

private:
  vtkTestFilterProgressFilter(const vtkTestFilterProgressFilter&) VTK_DELETE_FUNCTION;
  void operator=(const vtkTestFilterProgressFilterr&) VTK_DELETE_FUNCTION;

};

#endif

vtkTestFilterProgressFilter.cxx

#include "vtkSmartPointer.h"

#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkInformationVector.h"
#include "vtkInformation.h"
#include "vtkDataObject.h"
#include "vtkCallbackCommand.h"

#include "vtkTestFilterProgressFilter.h"

vtkStandardNewMacro(vtkTestFilterProgressFilter);

vtkTestFilterProgressFilter::vtkTestFilterProgressFilter()
{
  vtkSmartPointer<vtkCallbackCommand> progressCallback =
      vtkSmartPointer<vtkCallbackCommand>::New();
  progressCallback->SetCallback(this->ProgressFunction);

  this->AddObserver(vtkCommand::ProgressEvent, progressCallback);
}

void vtkTestFilterProgressFilter::ProgressFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData)
{
  vtkTestFilterProgressFilterr* testFilter = static_cast<vtkTestFilterProgressFilter*>(caller);
  cout << "Progress: " << testFilter->GetProgress() << endl;
}

int vtkTestFilterProgressFilter::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
  vtkPolyData *input = vtkPolyData::SafeDownCast(
      inInfo->Get(vtkDataObject::DATA_OBJECT()));

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

  for(vtkIdType i = 0; i < input->GetNumberOfPoints(); i++)
  {
    this->UpdateProgress(static_cast<double>(i)/input->GetNumberOfPoints());
  }

  output->ShallowCopy(input);

  return 1;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(FilterProgress)

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

add_executable(FilterProgress MACOSX_BUNDLE FilterProgress.cxx  vtkTestFilterProgressFilter.cxx)

target_link_libraries(FilterProgress ${VTK_LIBRARIES})

Download and Build FilterProgress

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

cd FilterProgress/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:

./FilterProgress

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.