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FilterSelfProgress

vtk-examples/Cxx/Developers/FilterSelfProgress

Question

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Code

FilterSelfProgress.cxx

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

#include "vtkTestFilterSelfProgressFilter.h"

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

int main(int /* argc */, char** /* argv */)
{
  vtkNew<vtkSphereSource> sphereSource;
  sphereSource->Update();

  vtkNew<vtkTestFilterSelfProgressFilter> testFilter;
  testFilter->SetInputConnection(sphereSource->GetOutputPort());
  testFilter->Update();

  return EXIT_SUCCESS;
}

vtkTestFilterSelfProgressFilter.h

#ifndef __vtkTestFilterSelfProgressFilter_h
#define __vtkTestFilterSelfProgressFilter_h

#include <vtkPolyDataAlgorithm.h>

class vtkTestFilterSelfProgressFilter : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkTestFilterSelfProgressFilter,vtkAlgorithm);

  static vtkTestFilterSelfProgressFilter *New();

protected:
  vtkTestFilterSelfProgressFilter();
  ~vtkTestFilterSelfProgressFilter() {}

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

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

private:
  vtkTestFilterSelfProgressFilter(const vtkTestFilterSelfProgressFilter&) = delete;
  void operator=(const vtkTestFilterSelfProgressFilter&) = delete;

};

#endif

vtkTestFilterSelfProgressFilter.cxx

#include <vtkCallbackCommand.h>
#include <vtkDataObject.h>
#include <vtkInformation.h>
#include <vtkInformationVector.h>
#include <vtkNew.h>
#include <vtkObjectFactory.h>
#include <vtkStreamingDemandDrivenPipeline.h>

#include "vtkTestFilterSelfProgressFilter.h"

vtkStandardNewMacro(vtkTestFilterSelfProgressFilter);

vtkTestFilterSelfProgressFilter::vtkTestFilterSelfProgressFilter()
{
  vtkNew<vtkCallbackCommand> progressCallback;
  progressCallback->SetCallback(this->ProgressFunction);

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

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

int vtkTestFilterSelfProgressFilter::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(FilterSelfProgress)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersSources
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping FilterSelfProgress: ${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(FilterSelfProgress MACOSX_BUNDLE FilterSelfProgress.cxx )
  target_link_libraries(FilterSelfProgress PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(FilterSelfProgress MACOSX_BUNDLE FilterSelfProgress.cxx )
  target_link_libraries(FilterSelfProgress PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS FilterSelfProgress
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build FilterSelfProgress

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

cd FilterSelfProgress/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:

./FilterSelfProgress

WINDOWS USERS

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