VTK/Examples/Cxx/Images/ImageContinuousErode3D

#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkImageData.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageContinuousErode3D.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkDataSetMapper.h>
 
int main(int, char *[])
{
  // Create an image
  vtkSmartPointer<vtkImageCanvasSource2D> source =
    vtkSmartPointer<vtkImageCanvasSource2D>::New();
  source->SetExtent(0, 20, 0, 20, 0, 20);
  source->Update();
 
  vtkSmartPointer<vtkImageContinuousErode3D> erodeFilter = 
    vtkSmartPointer<vtkImageContinuousErode3D>::New();
  erodeFilter->SetInputConnection(source->GetOutputPort());
  erodeFilter->Update();
 
  vtkSmartPointer<vtkDataSetMapper> originalMapper =
    vtkSmartPointer<vtkDataSetMapper>::New();
  originalMapper->SetInputConnection(source->GetOutputPort());
  originalMapper->Update();
 
  vtkSmartPointer<vtkActor> originalActor =
    vtkSmartPointer<vtkActor>::New();
  originalActor->SetMapper(originalMapper);
  originalActor->GetProperty()->SetRepresentationToPoints();
 
  vtkSmartPointer<vtkDataSetMapper> erodedMapper =
    vtkSmartPointer<vtkDataSetMapper>::New();
  erodedMapper->SetInputConnection(erodeFilter->GetOutputPort());
  erodedMapper->Update();
 
  vtkSmartPointer<vtkActor> erodedActor =
    vtkSmartPointer<vtkActor>::New();
  erodedActor->SetMapper(erodedMapper);
 
  // Visualize
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
 
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->SetSize(600, 300);
 
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);
 
  vtkSmartPointer<vtkRenderer> leftRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
  leftRenderer->SetBackground(.6, .5, .4);
 
  vtkSmartPointer<vtkRenderer> rightRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
  rightRenderer->SetBackground(.4, .5, .6);
 
  leftRenderer->AddActor(originalActor);
  rightRenderer->AddActor(erodedActor);
 
  leftRenderer->ResetCamera();
  rightRenderer->ResetCamera();
 
  renderWindow->Render();
  interactor->Start();
 
  return EXIT_SUCCESS;
}