FilterProgress

VTKExamples/Cxx/Developers/FilterProgress

Question

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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:
  vtkTestFilterProgressFilter();
  ~vtkTestFilterProgressFilter() override;

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

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

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

};

#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 = dynamic_cast<vtkPolyData*>(
      inInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkPolyData *output = dynamic_cast<vtkPolyData*>(
      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 3.3 FATAL_ERROR)

project(FilterProgress)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersSources QUIET)
if (NOT VTK_FOUND)
  message("Skipping FilterProgress: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(FilterProgress MACOSX_BUNDLE FilterProgress.cxx )
  target_link_libraries(FilterProgress PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(FilterProgress MACOSX_BUNDLE FilterProgress.cxx )
  target_link_libraries(FilterProgress PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS FilterProgress
    MODULES ${VTK_LIBRARIES}
    )
endif () 

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

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.