VTK/Examples/Cxx/StructuredGrid/StructuredGrid

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkStructuredGrid.h>
#include <vtkXMLStructuredGridWriter.h>
#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
 
int main(int, char *[])
{
  // Create a grid
  vtkSmartPointer<vtkStructuredGrid> structuredGrid =
    vtkSmartPointer<vtkStructuredGrid>::New();
 
  vtkSmartPointer<vtkPoints> points =
    vtkSmartPointer<vtkPoints>::New();
  double x, y, z;
 
  x = 0.0;
  y = 0.0;
  z = 0.0;
 
  for(unsigned int k = 0; k < 2; k++)
    {
    z += 2.0;
    for(unsigned int j = 0; j < 3; j++)
      {
      y += 1.0;
      for(unsigned int i = 0; i < 2; i++)
        {
        x += .5;
        points->InsertNextPoint(x, y, z);
        }
      }
    }
 
  // Specify the dimensions of the grid
  structuredGrid->SetDimensions(2,3,2);
  structuredGrid->SetPoints(points);
 
  int* dims = structuredGrid->GetDimensions();
 
  // Retrieve the entries from the grid and print them to the screen
  unsigned int counter = 0;
 
  for (int k = 0; k < dims[2]; k++)
    {
    for (int j = 0; j < dims[1]; j++)
      {
      for (int i = 0; i < dims[0]; i++)
        {
        double p[3];
        structuredGrid->GetPoint(counter, p);
 
        double pNew[3];
        structuredGrid->GetPoint(i, j, k, pNew);
 
        std::cout << "P   : " 
                  << p[0] << " " 
                  << p[1] << " " 
                  << p[2] << std::endl;
        std::cout << "PNew: " 
                  << pNew[0] << " "
                  << pNew[1] << " " 
                  << pNew[2] << std::endl;
 
        counter++;
        }
      }
    }
 
  // Create a mapper and actor
  vtkSmartPointer<vtkDataSetMapper> mapper =
    vtkSmartPointer<vtkDataSetMapper>::New();
#if VTK_MAJOR_VERSION <= 5
  mapper->SetInputConnection(structuredGrid->GetProducerPort());
#else
  mapper->SetInputData(structuredGrid);
#endif
 
  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(.3, .6, .3); // Background color green
 
  // Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}