VTK/Examples/Cxx/PolyData/PolyDataPointSampler

#include <vtkActor.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkPolyDataPointSampler.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
 
int main(int argc, char *argv[])
{
  // Create a sphere
  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
 
  // Sample the sphere
  vtkSmartPointer<vtkPolyDataPointSampler> pointSampler =
    vtkSmartPointer<vtkPolyDataPointSampler>::New();
  pointSampler->SetDistance(.1);
  pointSampler->SetInputConnection(sphereSource->GetOutputPort());
  pointSampler->Update();
 
  // Visualize
  vtkSmartPointer<vtkPolyDataMapper> sphereMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
 
  vtkSmartPointer<vtkActor> sphereActor =
    vtkSmartPointer<vtkActor>::New();
  sphereActor->SetMapper(sphereMapper);
 
  vtkSmartPointer<vtkPolyDataMapper> sampleMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  sampleMapper->SetInputConnection(pointSampler->GetOutputPort());
 
  vtkSmartPointer<vtkActor> sampleActor =
    vtkSmartPointer<vtkActor>::New();
  sampleActor->SetMapper(sampleMapper);
  sampleActor->GetProperty()->SetColor(1.0, 0.0, 0.0);
 
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  renderer->AddActor(sphereActor);
  renderer->AddActor(sampleActor);
  renderer->SetBackground(.3, .6, .3); // Background color green
 
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}