topology/ctopo-1.cpp

A simple example of cellular grid space with several cells instantiated and visualized. This program outputs this image.

See also

Creating (unsigned) cells in a cellular grid space

 
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/io/boards/Board2D.h"
#include "DGtal/io/Color.h"
 
 
using namespace std;
using namespace DGtal;
using namespace DGtal::Z2i;
 
int main()
{
  KSpace K;
  Point plow(-3,-2);
  Point pup(5,3);
  Domain domain( plow, pup );
  Board2D board; // for 2D display
  K.init( plow, pup, true );
  board << SetMode( domain.className(), "Paving" )
        << domain;
  Cell pixlow = K.uSpel( plow ); // pixel (-3*2+1,-2*2+1)
  Cell ptlow = K.uPointel( plow ); // pointel (-3*2,-2*2)
  Cell pixup = K.uSpel( pup ); // pixel (5*2+1,3*2+1)
  Cell ptup1 = K.uPointel( pup );   // pointel (5*2,3*2)
  Cell ptup2 = K.uTranslation( ptup1, Point::diagonal() ); // pointel (6*2,4*2)
  Cell linelb = K.uCell( Point( 1, 0 ) ); // linel (1,0) bottom
  Cell linelt = K.uCell( Point( 1, 2 ) ); // linel (1,2) top
  Cell linell = K.uCell( Point( 0, 1 ) ); // linel (0,1) left
  Cell linelr = K.uCell( Point( 2, 1 ) ); // linel (2,1) right
  board << CustomStyle( ptlow.className(),
                        new CustomColors( Color( 0, 0, 200 ),
                                          Color( 100, 100, 255 ) ) )
        << ptlow << ptup2;
  board << CustomStyle( pixlow.className(),
                        new CustomColors( Color( 200, 0, 0 ),
                                          Color( 255, 100, 100 ) ) )
        << pixlow << pixup;
  board << CustomStyle( linelb.className(),
                        new CustomColors( Color( 0, 200, 0 ),
                                          Color( 100, 255, 100 ) ) )
        << linelb << linelt << linell << linelr;
  board.saveSVG("ctopo-1.svg");
  board.saveEPS("ctopo-1.eps");
  return 0;
}
//                                                                           //