testBreadthFirstPropagation.cpp

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#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/io/boards/Board2D.h"
#include "DGtal/io/Color.h"
#include "DGtal/io/colormaps/GradientColorMap.h"
#include "DGtal/shapes/Shapes.h"
#include "DGtal/graph/CUndirectedSimpleGraph.h"
#include "DGtal/graph/BreadthFirstVisitor.h"
#include "DGtal/graph/CGraphVisitor.h"
#include <set>
#include <iterator>
 
 
using namespace std;
using namespace DGtal;
using namespace DGtal::concepts;
 
// Functions for testing objects as graph.
 
typedef ImageSelector < Z2i::Domain, int>::Type Image;
void testBreadthFirstPropagation()
{
  typedef Z2i::Point Point;
  typedef Z2i::Domain Domain;
  typedef Z2i::DigitalSet DigitalSet;
  typedef Z2i::Object4_8 Object;
  
  BOOST_CONCEPT_ASSERT(( CUndirectedSimpleGraph<Z2i::Object4_8> ));
  
  Point p1( -41, -36 );
  Point p2( 18, 18 );
  Domain domain( p1, p2 );
  Point c1( -2, -1 );
  Point c2( -14, 5 );
  Point c3( -30, -15 );
  Point c4( -10, -20 );
  Point c5( 12, -1 );
  DigitalSet shape_set( domain );
  
  Shapes<Domain>::addNorm2Ball( shape_set, c1, 9 );
  Shapes<Domain>::addNorm1Ball( shape_set, c2, 9 );
  Shapes<Domain>::addNorm1Ball( shape_set, c3, 10 );
  Shapes<Domain>::addNorm2Ball( shape_set, c4, 12 );
  Shapes<Domain>::addNorm1Ball( shape_set, c5, 4 );
 
  Object obj(Z2i::dt4_8, shape_set);
  
  
  GradientColorMap<int> cmap_grad( 0, 52);
  cmap_grad.addColor( Color( 0, 0, 255 ) );
  cmap_grad.addColor( Color( 0, 255, 0 ) );
  cmap_grad.addColor( Color( 255, 0, 0 ) );
  
  Board2D board;
  board << SetMode( domain.className(), "Paving" )
        << domain
        << SetMode( p1.className(), "Paving" );
  
  Image image = ImageFromSet<Image>::create(shape_set, 1);
  
  typedef BreadthFirstVisitor<Object, set<Point> > Visitor;
  BOOST_CONCEPT_ASSERT(( CGraphVisitor< Visitor > ));
  Visitor bfv (obj, c1);
  
  
  while( !bfv.finished() )
  {
    image.setValue(bfv.current().first, bfv.current().second);
    bfv.expand();
  }
  
  string specificStyle = p1.className() + "/Paving";
  
  for ( DigitalSet::ConstIterator it = shape_set.begin();
        it != shape_set.end();
        ++it )
    {
      if( image(*it) == 0)
        {
          board << CustomStyle( specificStyle,
                                new CustomColors( Color::Black,
                                                  Color::Red ) )
                << *it;
        }
      else
        {
          if( image(*it) > 0 )
            {
              board << CustomStyle( specificStyle,
                                    new CustomColors( Color::Black,
                                                      cmap_grad( image(*it) ) ) )
                    << *it;
            }
          else
            {
              board << CustomStyle( specificStyle,
                                    new CustomColors( Color::Black,
                                                      cmap_grad( 0 ) ) )
                    << *it;
            }
        }
    }
  
  board.saveEPS("testBreadthFirstPropagation.eps");
}
 
int main( int /*argc*/, char** /*argv*/ )
{
  testBreadthFirstPropagation();
  return 0;
}