VTK/Examples/Cxx/StructuredGrid/VisualizeStructuredGridCells

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
 
#include <vtkActor.h>
#include <vtkDataSetMapper.h>
#include <vtkMath.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkShrinkFilter.h>
#include <vtkStructuredGrid.h>
 
int main(int, char *[])
{
  // Create a grid
  vtkSmartPointer<vtkStructuredGrid> structuredGrid = 
    vtkSmartPointer<vtkStructuredGrid>::New();
 
  vtkSmartPointer<vtkPoints> points = 
    vtkSmartPointer<vtkPoints>::New();
  unsigned int numi = 3;
  unsigned int numj = 4;
  unsigned int numk = 5;
 
  for(unsigned int k = 0; k < numk; k++)
    {
    for(unsigned int j = 0; j < numj; j++)
      {
      for(unsigned int i = 0; i < numi; i++)
        {
        points->InsertNextPoint(i, j, k);
        }
      }
    }
 
  // Specify the dimensions of the grid
  structuredGrid->SetDimensions(numi, numj, numk);
  structuredGrid->SetPoints(points);
 
  std::cout << "There are "
            << structuredGrid->GetNumberOfPoints() << " points."
            << std::endl;
  std::cout << "There are "
            << structuredGrid->GetNumberOfCells() << " cells."
            << std::endl;
 
  vtkSmartPointer<vtkShrinkFilter> shrinkFilter = 
    vtkSmartPointer<vtkShrinkFilter>::New();
#if VTK_MAJOR_VERSION <= 5
  shrinkFilter->SetInputConnection(structuredGrid->GetProducerPort());
#else
  shrinkFilter->SetInputData(structuredGrid);
#endif
  shrinkFilter->SetShrinkFactor(.8);
 
  // Create a mapper and actor
  vtkSmartPointer<vtkDataSetMapper> mapper = 
    vtkSmartPointer<vtkDataSetMapper>::New();
  mapper->SetInputConnection(shrinkFilter->GetOutputPort());
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  // Create a renderer, render window, and interactor
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  // Add the actor to the scene
  renderer->AddActor(actor);
  renderer->SetBackground(.2, .3, .4);
 
  // Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}