// IAPS - Image analysis program system
// 
// File name  : exBnd.cc
// Description: an example of usage of the classes BVertexC, EdgeC, BoundaryC
// Last change: 2.06.1994
// Author     : Radek Marik
// Libraries  : iaps
// ------------------------------------------------------------------
//
//
// Modifications:
//
//
//

#include <iostream.h>
#include <fstream.h>
#include "amma/StdType.hh"
#include "amma/Pixel.hh"
#include "amma/ImageRec.hh"
#include "amma/Boundary.hh"
#include "amma/BndRegRowIter.hh"
#include "amma/ByteImag.hh"

int LorErow(const EdgeC & e1, const EdgeC & e2){
  if (e1.Begin().Row()<=e2.Begin().Row()) return 1;
  else return 0;
};

int 
main(void)
{
  //==============
  // boundary
  //==============

  cout << "An example of boundary\n"
       << "======================\n";

  // Create the boundary of a rectangle
  ImageRectangleC rect(PixelC(3,3), PixelC(7,7));
  BoundaryC       bnd1(rect);
  cout << "Boundary created from the rectangle [(3,3),(7,7)]:\n"
       << bnd1 << '\n';

  // Write into the file in compressed format
  ofstream os("ttt.txt");
  bnd1.WriteCompressed(os);
  os << '\n';
  os.close();

  // Read from the file which boundary is in compressed format.
  BoundaryC bnd2;  // empty boundary
  ifstream is("ttt.txt");
  bnd2.ReadCompressed(is);
  is.close();

  cout << "Boundary after writing and reading:\n"
       << bnd2 << '\n';  

  // Iterate over the region enclosed by the boundary
  BndRegRowIterC br_iter(bnd2);
  ByteImageC bnd_img(rect); bnd_img.Fill(0);
  for (br_iter.First(); br_iter.IsElm(); br_iter.Next()){
    for (PixelC pxl = br_iter.Data().A(); pxl.Col() <= br_iter.Data().B().Col(); pxl.Col()++){
      bnd_img[pxl] = 186;
    }
  }
  bnd_img.SaveAs("bnd_img.pgm");

  DLIterC<EdgeC> bnd_it(bnd2);
  bnd_it.Next().Next().Next().Next();
  bnd_it.Del(); bnd_it.Del();
  // Try the Order() routine
  bnd2.MergeSort(LorErow);
  cout << "Boundary after sorting:\n"
       << bnd2 << '\n';  

  bnd2.Order(bnd2.First()); 
  cout << "Boundary after ordering:\n"
       << bnd2 << '\n';  

  cout << "End of the example.\n";

  return(0);
}

// IAPS - Image analysis program system.
// End of file exBnd.cc